/* roulang page: index */
:root{
  --ink-900:#060D12;
  --ink-800:#0B1620;
  --ink-700:#10222C;
  --ink-600:#16303C;
  --brand-500:#14E3B4;
  --brand-400:#4CF0C8;
  --brand-700:#0A8E72;
  --amber-500:#FFB020;
  --text-100:#E6F1F4;
  --text-300:#C4D4DB;
  --text-500:#8FA5AE;
  --text-700:#5E747E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(20,227,180,.35);
  --ok:#35D07F;
  --warn:#FFB020;
  --err:#FF6B57;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-pill:999px;
  --shadow-card:0 24px 60px -32px rgba(0,0,0,.85);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-300);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--text-100);line-height:1.28}
p{margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
svg{display:block}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0;border-top:1px solid var(--line)}
.section:first-of-type{border-top:0}
.nums{font-variant-numeric:tabular-nums;letter-spacing:.02em;font-weight:700}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,13,18,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .22s ease-out;
}
.site-header.scrolled{background:rgba(6,13,18,.94)}
.nav-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
  height:72px;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.nav-left{display:flex;justify-content:flex-end}
.nav-right{display:flex;align-items:center;justify-content:space-between;gap:10px}
.nav-list{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  height:44px;padding:0 12px;
  font-size:14.5px;color:var(--text-300);
  border-radius:var(--r-sm);
  transition:color .2s ease-out;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:8px;height:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:center;
  transition:transform .22s ease-out;border-radius:2px;
}
.nav-link:hover{color:var(--text-100)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand-500)}
.nav-link.is-active::before{
  content:"";width:5px;height:5px;border-radius:50%;background:var(--brand-500);flex:none;
}
.brand{display:inline-flex;align-items:center;gap:10px;padding:6px 8px;border-radius:var(--r-sm)}
.brand-text{font-size:17px;font-weight:600;letter-spacing:.01em;color:var(--text-100);white-space:nowrap}
.brand:hover .brand-text{color:#fff}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-sm);border:1px solid transparent;
  font-size:14.5px;font-weight:600;line-height:1;
  padding:0 18px;height:44px;cursor:pointer;
  transition:transform .18s ease-out,box-shadow .22s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn-primary{
  background:var(--amber-500);color:#1A1200;
  box-shadow:0 0 0 1px rgba(255,176,32,.35),0 14px 34px -16px rgba(255,176,32,.6);
}
.btn-primary:hover{background:#FFC24D;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  background:rgba(16,34,44,.6);color:var(--text-100);border-color:var(--line);
}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--brand-400);transform:translateY(-1px)}
.btn-brand{
  background:transparent;color:var(--brand-500);border-color:var(--line-strong);
  box-shadow:0 0 0 1px rgba(20,227,180,.18),0 14px 34px -18px rgba(20,227,180,.55);
}
.btn-brand:hover{background:rgba(20,227,180,.1);color:var(--brand-400);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:rgba(16,34,44,.7);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--text-100);border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out}
.nav-toggle span+span{margin-top:5px}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-panel{
  display:none;
  background:var(--ink-800);
  border-bottom:1px solid var(--line);
}
.nav-panel.open{display:block}
.nav-panel .container{padding-top:10px;padding-bottom:18px}
.nav-panel a{
  display:flex;align-items:center;
  height:48px;padding:0 12px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text-300);
}
.nav-panel a:hover{background:var(--ink-700);color:var(--text-100)}
.nav-panel a.is-active{color:var(--brand-500)}
.nav-panel .btn{width:100%;margin-top:12px;height:48px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;background-image:url("/assets/images/backpic/back-1.png");background-size:cover;background-position:center}
.hero-bg::before{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(0deg,rgba(255,255,255,.03) 0 1px,transparent 1px 40px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.03) 0 1px,transparent 1px 40px);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(6,13,18,.88),rgba(6,13,18,.96)),
    radial-gradient(60% 60% at 10% 0%,rgba(20,227,180,.16),transparent 70%);
}
.hero-line{position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(20,227,180,.75),transparent)}
.hero-inner{position:relative;padding:104px 0}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:center}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:11.5px;line-height:1;font-weight:600;letter-spacing:.01em;
}
.badge-brand{color:var(--brand-500);border:1px solid var(--line-strong);background:rgba(20,227,180,.12)}
.badge-warn{color:var(--amber-500);border:1px solid rgba(255,176,32,.4);background:rgba(255,176,32,.1)}
.badge-neutral{color:var(--text-500);border:1px solid var(--line);background:rgba(255,255,255,.04)}
.hero h1{
  font-size:clamp(30px,4.6vw,54px);
  line-height:1.15;font-weight:700;letter-spacing:-.01em;
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--brand-500);position:relative;white-space:nowrap}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:6px;border-radius:3px;
  background:rgba(20,227,180,.22);
}
.hero-sub{max-width:34ch;font-size:16.5px;line-height:1.8;color:var(--text-300);margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-actions .btn{height:48px;padding:0 22px}
.hero-metrics{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13.5px;color:var(--text-500)}
.hero-metrics .m{display:inline-flex;align-items:center;gap:7px}
.hero-metrics .m svg{color:var(--brand-500)}
.hero-metrics .sep{color:var(--text-700)}
.hero-metrics b{color:var(--text-100);font-weight:700}

.panel{
  position:relative;
  border-radius:var(--r-lg);
  background:rgba(16,34,44,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  padding:26px 24px 20px;
  overflow:hidden;
}
.panel::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(20,227,180,.9),transparent)}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.panel-title{font-size:14px;font-weight:600;color:var(--text-100);letter-spacing:.02em}
.panel-live{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--ok)}
.dot-live{width:6px;height:6px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(53,208,127,.16)}
.metric-row{padding:14px 0;border-bottom:1px solid var(--line)}
.metric-row:last-of-type{border-bottom:0}
.metric-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:8px}
.metric-label{font-size:13px;color:var(--text-500)}
.metric-value{font-size:31px;line-height:1;color:var(--text-100);font-variant-numeric:tabular-nums;letter-spacing:.02em;font-weight:700}
.metric-value small{font-size:13px;color:var(--text-500);font-weight:500;margin-left:4px}
.bar{height:4px;border-radius:2px;background:var(--ink-600);overflow:hidden}
.bar i{display:block;height:100%;border-radius:2px;background:var(--brand-500);box-shadow:0 0 12px rgba(20,227,180,.75)}
.panel-foot{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-700);display:flex;align-items:center;gap:8px}

/* ---------- 指标条 ---------- */
.strip{background:var(--ink-800);border-bottom:1px solid var(--line)}
.strip-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.strip-item{padding:26px 20px;border-left:1px solid var(--line)}
.strip-item:first-child{border-left:0}
.strip-k{font-size:12.5px;color:var(--text-500);margin-bottom:6px}
.strip-v{font-size:22px;color:var(--text-100);font-variant-numeric:tabular-nums;letter-spacing:.02em;font-weight:700}
.strip-v small{font-size:13px;color:var(--brand-500);font-weight:600;margin-left:6px}

/* ---------- 板块标题 ---------- */
.sec-head{max-width:62ch;margin-bottom:38px}
.sec-head h2{position:relative;padding-left:14px;font-size:clamp(22px,2.6vw,34px);font-weight:650;margin-bottom:14px}
.sec-head h2::before{content:"";position:absolute;left:0;top:8px;width:3px;height:18px;border-radius:2px;background:var(--brand-500)}
.sec-head p{font-size:15.5px;line-height:1.8;color:var(--text-500)}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:38px}
.sec-head-row .sec-head{margin-bottom:0}
.link-more{display:inline-flex;align-items:center;gap:6px;height:44px;font-size:14px;font-weight:600;color:var(--brand-500);white-space:nowrap;transition:color .2s ease-out}
.link-more svg{transition:transform .2s ease-out}
.link-more:hover{color:var(--brand-400)}
.link-more:hover svg{transform:translateX(4px)}

/* ---------- 服务矩阵 ---------- */
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.card{
  position:relative;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
  overflow:hidden;
}
.card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 30px 70px -34px rgba(0,0,0,.9)}
.card-media{position:relative;aspect-ratio:16/10;background:var(--ink-600);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:22px 24px 24px}
.card-body h3{font-size:22px;font-weight:650;margin-bottom:10px}
.card-body p{font-size:14.5px;line-height:1.8;color:var(--text-500)}
.card-link{display:inline-flex;align-items:center;gap:7px;margin-top:16px;font-size:14px;font-weight:600;color:var(--brand-500)}
.card-link svg{transition:transform .2s ease-out}
.card:hover .card-link svg{transform:translateX(4px)}
.span-7{grid-column:span 7}
.span-5{grid-column:span 5}
.span-4{grid-column:span 4}
.card-plain{padding:26px 26px 24px;display:flex;flex-direction:column}
.card-plain .ico{width:44px;height:44px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;background:rgba(20,227,180,.1);border:1px solid var(--line-strong);color:var(--brand-500);margin-bottom:18px}
.card-plain h3{font-size:20px;font-weight:650;margin-bottom:12px}
.point-list{margin-top:4px}
.point-list li{display:flex;gap:9px;font-size:14px;line-height:1.75;color:var(--text-300);padding:5px 0}
.point-list li svg{flex:none;margin-top:5px;color:var(--brand-500)}
.card-mini{padding:22px 22px 20px;display:flex;flex-direction:column;min-height:100%}
.card-mini .ico{width:38px;height:38px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;background:rgba(20,227,180,.08);border:1px solid var(--line);color:var(--brand-500);margin-bottom:14px}
.card-mini h3{font-size:17px;font-weight:600;margin-bottom:8px}
.card-mini p{font-size:13.5px;line-height:1.75;color:var(--text-500)}
.card-mini .arrow{margin-top:auto;padding-top:16px;display:flex;justify-content:flex-end;color:var(--brand-500)}
.card-mini:hover .arrow svg{transform:translateX(4px)}
.card-mini .arrow svg{transition:transform .2s ease-out}

/* ---------- 对比区 ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:48px;position:relative}
.compare::before{
  content:"";position:absolute;left:50%;top:8px;bottom:8px;transform:translateX(-50%);
  border-left:1px dashed rgba(255,255,255,.14);
}
.compare-badge{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink-800);border:1px solid var(--line-strong);
  color:var(--brand-500);font-size:12px;font-weight:700;letter-spacing:.08em;
  box-shadow:0 0 0 8px var(--ink-900);
}
.compare h3{font-size:14px;font-weight:600;letter-spacing:.06em;margin-bottom:20px;color:var(--text-500)}
.compare .right h3{color:var(--brand-500)}
.compare li{display:flex;gap:12px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line);font-size:15px;line-height:1.7}
.compare li:last-child{border-bottom:0}
.compare .left li{color:var(--text-500)}
.compare .left li svg{color:var(--text-700)}
.compare .right li{color:var(--text-100)}
.compare .right li svg{color:var(--brand-500)}
.compare li svg{flex:none;margin-top:4px}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out}
.news-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 30px 70px -34px rgba(0,0,0,.9)}
.news-thumb{position:relative;aspect-ratio:16/10;background:var(--ink-600);overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.news-thumb .ph{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:var(--brand-500)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.news-title{font-size:17px;font-weight:600;line-height:1.5;color:var(--text-100);margin:10px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-desc{font-size:14px;line-height:1.7;color:var(--text-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-700)}
.news-foot .sep{width:3px;height:3px;border-radius:50%;background:var(--text-700)}
.news-foot .go{margin-left:auto;color:var(--brand-500);display:inline-flex;align-items:center;gap:4px;font-weight:600}
.news-card:hover .news-foot .go svg{transform:translateX(3px)}
.news-foot .go svg{transition:transform .2s ease-out}
.empty-state{grid-column:1/-1;border:1px dashed var(--line);border-radius:var(--r-lg);padding:52px 24px;text-align:center;background:rgba(16,34,44,.35)}
.empty-state .ph{display:flex;justify-content:center;color:var(--text-700);margin-bottom:14px}
.empty-state p{font-size:15px;color:var(--text-500);margin-bottom:18px}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.faq-intro h2{position:relative;padding-left:14px;font-size:clamp(22px,2.6vw,34px);font-weight:650;margin-bottom:16px}
.faq-intro h2::before{content:"";position:absolute;left:0;top:8px;width:3px;height:18px;border-radius:2px;background:var(--brand-500)}
.faq-intro p{font-size:15px;line-height:1.85;color:var(--text-500);margin-bottom:24px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:18px 12px;background:transparent;border:0;cursor:pointer;
  text-align:left;border-radius:var(--r-sm);
  transition:background .2s ease-out;
}
.faq-q:hover{background:rgba(255,255,255,.03)}
.faq-num{font-size:12.5px;color:rgba(20,227,180,.6);font-variant-numeric:tabular-nums;letter-spacing:.06em;flex:none;font-weight:700}
.faq-t{flex:1;font-size:17px;font-weight:600;color:var(--text-100);line-height:1.5}
.faq-ico{flex:none;color:var(--text-500);transition:transform .22s ease-out,color .2s ease-out}
.faq-item.open .faq-ico{transform:rotate(45deg);color:var(--brand-500)}
.faq-a{display:none;padding:0 12px 20px 46px}
.faq-item.open .faq-a{display:block}
.faq-item.open{background:rgba(16,34,44,.55);border-radius:var(--r-md);border-bottom-color:transparent;margin:6px 0;box-shadow:inset 0 0 0 1px var(--line)}
.faq-a p{font-size:15px;line-height:1.85;color:var(--text-300);max-width:68ch}

/* ---------- 表单 ---------- */
.contact-wrap{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.contact-left h2{position:relative;padding-left:14px;font-size:clamp(22px,2.6vw,34px);font-weight:650;margin-bottom:16px}
.contact-left h2::before{content:"";position:absolute;left:0;top:8px;width:3px;height:18px;border-radius:2px;background:var(--brand-500)}
.contact-left p{font-size:15px;line-height:1.85;color:var(--text-500);margin-bottom:26px}
.value-list li{display:flex;gap:12px;align-items:flex-start;padding:12px 0;font-size:15px;color:var(--text-300);border-bottom:1px solid var(--line)}
.value-list li svg{flex:none;margin-top:4px;color:var(--brand-500)}
.privacy-note{display:flex;gap:8px;align-items:flex-start;margin-top:22px;font-size:12.5px;line-height:1.7;color:var(--text-700)}
.privacy-note svg{flex:none;margin-top:3px}
.form-card{
  background:rgba(16,34,44,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  padding:28px 26px;
}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:var(--text-300);margin-bottom:8px;font-weight:600}
.field input,.field select,.field textarea{
  width:100%;
  background:#0A1519;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  padding:12px 14px;
  font-size:14.5px;
  color:var(--text-100);
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.field input{height:46px}
.field textarea{resize:vertical;min-height:112px;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#5E747E}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(20,227,180,.18);
}
.field select{height:46px;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238FA5AE' stroke-width='1.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:40px}
.check-row{display:flex;gap:10px;align-items:flex-start;margin:6px 0 22px}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--brand-500);flex:none}
.check-row label{font-size:13px;line-height:1.7;color:var(--text-500);margin:0;font-weight:400}
.form-card .btn{width:100%;height:48px}
.form-msg{display:none;margin-top:16px;padding:12px 14px;border-radius:var(--r-sm);border:1px solid var(--line-strong);background:rgba(20,227,180,.08);color:var(--brand-400);font-size:13.5px}
.form-msg.show{display:block}

/* ---------- 页脚 ---------- */
.site-footer{background:#050A0E;border-top:1px solid var(--line);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:32px;padding-bottom:48px}
.f-brand{grid-column:span 5}
.f-quick{grid-column:span 2}
.f-cat{grid-column:span 2}
.f-legal{grid-column:span 3}
.f-brand p{font-size:14px;line-height:1.8;color:var(--text-500);margin:16px 0 18px;max-width:32ch}
.f-contact{font-size:13.5px;line-height:2;color:var(--text-500)}
.f-contact b{color:var(--text-300);font-weight:600}
.f-social{display:flex;gap:10px;margin-top:18px}
.f-social a{
  width:38px;height:38px;border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--text-500);
  transition:color .2s ease-out,border-color .2s ease-out,transform .2s ease-out;
}
.f-social a:hover{color:var(--brand-500);border-color:var(--line-strong);transform:translateY(-2px)}
.f-title{font-size:13px;font-weight:700;color:var(--text-100);letter-spacing:.06em;margin-bottom:16px}
.f-links li{margin-bottom:11px}
.f-links a{font-size:14px;color:var(--text-500);transition:color .2s ease-out}
.f-links a:hover{color:var(--brand-500);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
.f-legal p{font-size:13px;line-height:1.9;color:var(--text-700);margin-bottom:10px}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 28px}
.footer-bottom .container{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:12.5px;color:var(--text-700)}
.footer-bottom .sep{width:3px;height:3px;border-radius:50%;background:var(--text-700)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-left,.nav-right{display:none}
  .nav-inner{grid-template-columns:44px 1fr 44px;height:64px;padding:0 20px}
  .nav-inner .brand{justify-self:center;grid-column:2}
  .nav-toggle{display:flex;grid-column:3;justify-self:end;margin-left:0}
  .hero-inner{padding:64px 0}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-sub{max-width:56ch}
  .span-7,.span-5{grid-column:span 12}
  .span-4{grid-column:span 6}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .faq-wrap,.contact-wrap{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:repeat(6,1fr)}
  .f-brand{grid-column:span 6}
  .f-quick{grid-column:span 3}
  .f-cat{grid-column:span 3}
  .f-legal{grid-column:span 6}
}
@media (max-width:767px){
  .section{padding:64px 0}
  .container{padding:0 20px}
  .strip-grid{grid-template-columns:repeat(2,1fr)}
  .strip-item:nth-child(3){border-left:0}
  .strip-item:nth-child(1),.strip-item:nth-child(2){border-bottom:1px solid var(--line)}
  .span-4{grid-column:span 12}
  .news-grid{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr;gap:28px}
  .compare::before{left:0;right:0;top:50%;bottom:auto;transform:none;border-left:0;border-top:1px dashed rgba(255,255,255,.14)}
  .compare-badge{top:50%;left:50%;transform:translate(-50%,-50%)}
  .sec-head-row{flex-direction:column;align-items:flex-start;gap:6px}
  .grid-12{gap:20px}
  .footer-grid{gap:26px;padding-bottom:36px}
  .f-quick,.f-cat{grid-column:span 6}
  .hero-metrics{font-size:12.5px;gap:10px}
  .hero-metrics .sep{display:none}
  .hero-metrics .m{width:100%}
  .card-body h3{font-size:20px}
}
@media (max-width:519px){
  .hero h1{font-size:30px}
  .hero-actions .btn{width:100%}
  .news-grid{gap:18px}
  .form-card{padding:22px 18px}
  .btn{height:46px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
  .card:hover,.news-card:hover,.btn:hover{transform:none !important}
}

/* roulang page: article */
:root{
  --ink-900:#060D12;
  --ink-800:#0B1620;
  --ink-700:#10222C;
  --ink-600:#16303C;
  --brand-500:#14E3B4;
  --brand-400:#4CF0C8;
  --brand-700:#0A8E72;
  --amber-500:#FFB020;
  --text-100:#E6F1F4;
  --text-300:#C4D4DB;
  --text-500:#8FA5AE;
  --text-700:#5E747E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(20,227,180,.35);
  --success:#35D07F;
  --danger:#FF6B57;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-card:0 24px 60px -32px rgba(0,0,0,.85);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-300);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--text-100);font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px;margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,13,18,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .24s ease-out;
}
.site-header.is-scrolled{background:rgba(6,13,18,.92)}
.nav-inner{
  position:relative;
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:72px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
}
.nav-left{display:flex;justify-content:flex-end}
.nav-right{display:flex;justify-content:flex-start;align-items:center;gap:20px}
.nav-list{display:flex;align-items:center;gap:24px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  font-size:14.5px;color:var(--text-300);padding:8px 2px;
  transition:color .2s ease-out;
}
.nav-link:hover{color:var(--text-100)}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;
  background:var(--brand-500);border-radius:2px;transform:translateX(-50%);
  transition:width .22s ease-out;
}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand-500)}
.nav-link.is-active::after{width:100%}
.nav-link.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;width:5px;height:5px;
  border-radius:50%;background:var(--brand-500);transform:translateY(-50%);
}
.brand{display:inline-flex;align-items:center;gap:9px;white-space:nowrap}
.brand-text{font-size:17px;font-weight:600;letter-spacing:.01em;color:var(--text-100)}
.brand:hover .brand-text{color:var(--brand-400)}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:44px;height:44px;padding:0;border:1px solid var(--line);
  background:transparent;border-radius:var(--radius-sm);cursor:pointer;
  margin-left:auto;
}
.nav-toggle span{display:block;width:18px;height:2px;margin:0 auto;background:var(--text-100);border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-panel{display:none;background:var(--ink-800);border-bottom:1px solid var(--line)}
.nav-panel.open{display:block}
.nav-panel .container{padding-top:8px;padding-bottom:16px}
.nav-panel a{
  display:flex;align-items:center;min-height:48px;font-size:15px;
  color:var(--text-300);border-bottom:1px solid var(--line);
}
.nav-panel a:hover,.nav-panel a.is-active{color:var(--brand-500)}
.nav-panel .btn{margin-top:14px;border-bottom:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-sm);
  font-size:14.5px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn:active{transform:translateY(1px)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.btn-brand{
  background:rgba(20,227,180,.12);color:var(--brand-400);
  border-color:rgba(20,227,180,.45);
  box-shadow:0 0 0 1px rgba(20,227,180,.18),0 14px 34px -14px rgba(20,227,180,.55);
}
.btn-brand:hover{
  background:rgba(20,227,180,.2);color:#EFFFFA;transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(20,227,180,.45),0 18px 38px -14px rgba(20,227,180,.75);
}
.btn-amber{
  background:var(--amber-500);color:#0A1519;
  box-shadow:0 0 0 1px rgba(255,176,32,.45),0 14px 34px -12px rgba(255,176,32,.55);
}
.btn-amber:hover{background:#FFC24D;transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-100)}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--brand-400);transform:translateY(-1px)}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:11.5px;font-weight:600;letter-spacing:.02em;
  border:1px solid var(--line-strong);color:var(--brand-400);background:rgba(20,227,180,.12);
}
.badge-amber{border-color:rgba(255,176,32,.45);color:var(--amber-500);background:rgba(255,176,32,.1)}
.badge-neutral{border-color:var(--line);color:var(--text-500);background:rgba(255,255,255,.04)}

/* ---------- 文章头部 ---------- */
.article-top{
  border-bottom:1px solid var(--line);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px),
    radial-gradient(60% 70% at 8% 0%,rgba(20,227,180,.14),transparent 62%);
  background-size:40px 40px,40px 40px,100% 100%;
  padding:36px 0 48px;
}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:12.5px;color:var(--text-500);margin-bottom:26px;
}
.breadcrumb a{color:var(--text-500);transition:color .2s ease-out}
.breadcrumb a:hover{color:var(--brand-400)}
.breadcrumb .current{color:var(--brand-400);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.breadcrumb svg{flex:0 0 auto;color:var(--text-700)}
.article-title{
  font-size:clamp(28px,4vw,44px);
  line-height:1.22;font-weight:700;letter-spacing:-.01em;color:var(--text-100);
  max-width:900px;
}
.article-title .accent{color:var(--brand-400)}
.article-sub{
  margin-top:16px;max-width:62ch;font-size:15.5px;line-height:1.85;color:var(--text-500);
}
.meta-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  margin-top:26px;font-size:12.5px;color:var(--text-500);
}
.meta-row .m-item{display:inline-flex;align-items:center;gap:6px}
.meta-row svg{color:var(--brand-500);opacity:.85}
.meta-row .dot{color:var(--text-700)}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}

/* ---------- 封面 ---------- */
.cover-wrap{max-width:940px;margin:-32px auto 0;padding:0 24px;position:relative;z-index:2}
.cover-frame{
  position:relative;aspect-ratio:16/10;overflow:hidden;border-radius:14px;
  border:1px solid var(--line);background:var(--ink-600);
  box-shadow:var(--shadow-card);
}
.cover-frame img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.cover-frame:hover img{transform:scale(1.03)}
.cover-cap{margin-top:12px;font-size:12.5px;color:var(--text-700);text-align:center}

/* ---------- 正文 ---------- */
.article-main{padding:56px 0 8px}
.article-body{
  max-width:760px;margin:0 auto;padding:0 24px;
  font-size:16.5px;line-height:1.9;color:var(--text-300);
}
.article-body p{margin:0 0 22px}
.article-body h2{
  position:relative;font-size:22px;line-height:1.5;font-weight:650;color:var(--text-100);
  margin:40px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:9px;width:3px;height:18px;
  background:var(--brand-500);border-radius:2px;
}
.article-body h3{font-size:18px;line-height:1.5;font-weight:600;color:var(--text-100);margin:28px 0 12px}
.article-body ul{margin:0 0 22px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  background:var(--brand-500);border-radius:1px;
}
.article-body ol{counter-reset:item;margin:0 0 22px}
.article-body ol li{position:relative;padding-left:26px;margin-bottom:10px;counter-increment:item}
.article-body ol li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;left:0;top:0;color:var(--brand-500);font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.article-body blockquote{
  margin:0 0 22px;padding:16px 20px;border-left:3px solid var(--brand-500);
  background:var(--ink-800);border-radius:0 12px 12px 0;
  font-size:15.5px;font-weight:500;color:var(--text-300);
}
.article-body a{color:var(--brand-400);border-bottom:1px solid rgba(20,227,180,.35)}
.article-body a:hover{color:var(--brand-500);border-bottom-color:var(--brand-500)}
.article-body img{border-radius:14px;border:1px solid var(--line);margin:24px auto;height:auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:12.5px;color:var(--text-700);text-align:center;margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--ink-800);color:var(--text-100)}

/* 空态 */
.empty-box{
  max-width:760px;margin:0 auto;padding:48px 24px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--radius-lg);background:var(--ink-800);
}
.empty-box svg{color:var(--brand-500);margin:0 auto 14px}
.empty-box h2{font-size:20px;color:var(--text-100);margin-bottom:10px}
.empty-box p{font-size:14.5px;color:var(--text-500);margin-bottom:22px}

/* ---------- 文末标签 ---------- */
.article-foot{max-width:760px;margin:48px auto 0;padding:24px 24px 0;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.foot-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.back-link{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--brand-400);
  transition:gap .2s ease-out,color .2s ease-out;
}
.back-link:hover{gap:12px;color:var(--brand-500)}

/* ---------- 相关推荐 ---------- */
.related{padding:64px 0 8px}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:20px;flex-wrap:wrap;margin-bottom:32px;
}
.sec-head h2{
  position:relative;font-size:clamp(22px,2.6vw,30px);line-height:1.3;
  padding-top:14px;color:var(--text-100);font-weight:650;
}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:0;width:3px;height:18px;
  background:var(--brand-500);border-radius:2px;
}
.sec-head p{font-size:14px;color:var(--text-500);margin-top:6px;max-width:62ch}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--brand-400);
  transition:gap .2s ease-out,color .2s ease-out;
}
.text-link:hover{gap:12px;color:var(--brand-500)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.post-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 30px 66px -30px rgba(0,0,0,.95)}
.post-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink-600)}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--text-100)}
.post-body .desc{font-size:14px;line-height:1.7;color:var(--text-500)}
.post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-700)}
.post-foot svg{transition:transform .2s ease-out;color:var(--brand-400)}
.post-card:hover .post-foot svg{transform:translateX(4px)}

/* ---------- CTA 条 ---------- */
.cta-strip{padding:64px 0 88px}
.cta-box{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding:28px 32px;border-radius:var(--radius-lg);
  background:linear-gradient(120deg,rgba(20,227,180,.1),rgba(11,22,32,.9) 55%),var(--ink-800);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card);
}
.cta-box h2{font-size:20px;line-height:1.4;color:var(--text-100);font-weight:650}
.cta-box p{font-size:14px;color:var(--text-500);margin-top:6px;max-width:56ch}

/* ---------- 页脚 ---------- */
.site-footer{background:#050A0E;border-top:1px solid var(--line);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:5fr 2fr 2fr 3fr;gap:32px}
.f-brand .brand{margin-bottom:14px}
.f-brand p{font-size:14px;line-height:1.7;color:var(--text-500);max-width:24ch}
.f-contact{margin-top:16px;font-size:13px;line-height:1.9;color:var(--text-500)}
.f-contact b{color:var(--text-300);font-weight:600}
.f-social{display:flex;gap:10px;margin-top:18px}
.f-social a{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--text-500);
  transition:color .2s ease-out,border-color .2s ease-out,transform .2s ease-out;
}
.f-social a:hover{color:var(--brand-400);border-color:var(--line-strong);transform:translateY(-2px)}
.f-title{font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--text-100);margin-bottom:14px}
.f-links li{margin-bottom:10px}
.f-links a{
  font-size:14px;color:var(--text-500);border-bottom:1px solid transparent;
  transition:color .2s ease-out,border-color .2s ease-out;
}
.f-links a:hover{color:var(--brand-400);border-bottom-color:var(--brand-400)}
.f-legal p{font-size:13px;line-height:1.9;color:var(--text-700)}
.footer-bottom{
  margin-top:44px;padding:20px 0 26px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.5px;color:var(--text-700);
}
.footer-bottom .sep{color:var(--text-700);opacity:.6}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-inner{height:64px;grid-template-columns:1fr auto 1fr}
  .nav-left,.nav-right{display:none}
  .brand{position:absolute;left:50%;transform:translateX(-50%)}
  .nav-toggle{display:flex}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .f-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .narrow{padding:0 20px}
  .article-top{padding:24px 0 36px}
  .cover-wrap{margin-top:-24px;padding:0 20px}
  .article-main{padding:40px 0 0}
  .article-body{padding:0 20px;font-size:16px;line-height:1.85}
  .article-foot{padding:20px 20px 0;margin-top:36px}
  .related{padding:48px 0 0}
  .card-grid{grid-template-columns:minmax(0,1fr);gap:18px}
  .cta-strip{padding:48px 0 64px}
  .cta-box{padding:22px}
  .cta-box .btn{width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .site-footer{padding-top:44px}
  .breadcrumb .current{white-space:normal}
}
@media (max-width:520px){
  .brand-text{font-size:15.5px}
  .article-title{font-size:26px}
  .meta-row{font-size:12px}
  .btn{width:100%}
  .foot-actions{flex-direction:column;align-items:stretch}
  .foot-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .post-card:hover,.cover-frame:hover img,.btn:hover{transform:none !important}
}

/* roulang page: category1 */
:root{
    --ink-900:#060D12; --ink-800:#0B1620; --ink-700:#10222C; --ink-600:#16303C;
    --brand-500:#14E3B4; --brand-400:#4CF0C8; --brand-700:#0A8E72;
    --amber-500:#FFB020;
    --text-100:#E6F1F4; --text-300:#C4D4DB; --text-500:#8FA5AE; --text-700:#5E747E;
    --line:rgba(255,255,255,.08); --line-strong:rgba(20,227,180,.35);
    --ok:#35D07F; --warn:#FFB020; --err:#FF6B57;
    --r-lg:16px; --r-md:12px; --r-sm:10px;
    --shadow-card:0 24px 60px -32px rgba(0,0,0,.85);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;background:var(--ink-900);color:var(--text-300);
    font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  h1,h2,h3,h4,p,ul,ol{margin:0;}
  ul,ol{padding:0;list-style:none;}
  :focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 22px;border-radius:var(--r-sm);
    font-size:14.5px;font-weight:600;letter-spacing:.01em;
    border:1px solid transparent;transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,border-color .2s ease-out,color .2s ease-out;
  }
  .btn svg{flex:none;}
  .btn-brand{
    background:var(--amber-500);color:#0A1519;border-color:rgba(255,176,32,.5);
    box-shadow:0 0 0 1px rgba(255,176,32,.28),0 14px 34px -14px rgba(255,176,32,.6);
  }
  .btn-brand:hover{background:#FFC24D;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,176,32,.45),0 18px 38px -14px rgba(255,176,32,.7);}
  .btn-brand:active{transform:translateY(0);}
  .btn-ghost{
    background:transparent;color:var(--text-100);border-color:var(--line);
  }
  .btn-ghost:hover{border-color:var(--line-strong);color:var(--brand-400);transform:translateY(-1px);}
  .btn-outline-brand{
    background:rgba(20,227,180,.08);color:var(--brand-400);border-color:var(--line-strong);
    box-shadow:0 0 0 1px rgba(20,227,180,.18),0 14px 34px -14px rgba(20,227,180,.45);
  }
  .btn-outline-brand:hover{background:rgba(20,227,180,.16);border-color:rgba(20,227,180,.75);transform:translateY(-1px);}
  .btn-sm{min-height:38px;padding:0 16px;font-size:13.5px;border-radius:var(--r-sm);}
  .link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-size:14px;font-weight:600;}
  .link-arrow svg{transition:transform .2s ease-out;}
  .link-arrow:hover svg{transform:translateX(4px);}

  /* ============ 导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(6,13,18,.72);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
    transition:background-color .24s ease-out,border-color .24s ease-out;
  }
  .site-header.is-scrolled{background:rgba(6,13,18,.94);border-bottom-color:rgba(255,255,255,.12);}
  .nav-inner{
    display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
    gap:16px;height:72px;max-width:1200px;margin:0 auto;padding:0 24px;
  }
  .nav-left{display:flex;justify-content:flex-end;}
  .nav-right{display:flex;align-items:center;gap:18px;justify-content:flex-start;}
  .nav-list{display:flex;align-items:center;gap:26px;}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;
    min-height:44px;font-size:14.5px;color:var(--text-300);
    transition:color .2s ease-out;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:8px;height:2px;width:0;
    background:var(--brand-500);transform:translateX(-50%);
    transition:width .22s ease-out;border-radius:2px;
  }
  .nav-link:hover{color:var(--text-100);}
  .nav-link:hover::after{width:100%;}
  .nav-link.is-active{color:var(--brand-500);}
  .nav-link.is-active::before{
    content:"";width:5px;height:5px;border-radius:50%;
    background:var(--brand-500);margin-right:7px;
    box-shadow:0 0 8px rgba(20,227,180,.8);
  }
  .nav-link.is-active::after{width:100%;}
  .brand{display:inline-flex;align-items:center;gap:9px;justify-self:center;}
  .brand-text{
    font-size:17px;font-weight:600;letter-spacing:.01em;color:var(--text-100);white-space:nowrap;
  }
  .brand:hover .brand-text{color:var(--brand-400);}
  .brand-text{transition:color .2s ease-out;}
  .nav-toggle{
    display:none;justify-self:end;width:44px;height:44px;
    flex-direction:column;align-items:center;justify-content:center;gap:5px;
    border-radius:var(--r-sm);border:1px solid var(--line);
  }
  .nav-toggle span{display:block;width:18px;height:1.6px;background:var(--text-100);border-radius:2px;transition:transform .22s ease-out,opacity .18s ease-out;}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.6px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg);}
  .nav-panel{display:none;}

  /* ============ 页头横幅 ============ */
  .page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
  .page-hero::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center;
    opacity:.5;
  }
  .page-hero::after{
    content:"";position:absolute;inset:0;
    background:
      radial-gradient(60% 80% at 8% 0%, rgba(20,227,180,.16), transparent 70%),
      linear-gradient(180deg, rgba(6,13,18,.86) 0%, rgba(6,13,18,.96) 100%);
  }
  .page-hero-line{
    position:absolute;top:0;left:0;right:0;height:1px;z-index:3;
    background:linear-gradient(90deg,transparent,rgba(20,227,180,.75),transparent);
  }
  .page-hero-inner{position:relative;z-index:2;padding:40px 0 60px;}
  .grid-texture{
    position:absolute;inset:0;z-index:1;pointer-events:none;
    background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
    background-size:40px 40px;
    mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 78%);
    -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 78%);
  }
  .crumbs{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-500);margin-bottom:22px;flex-wrap:wrap;}
  .crumbs a{color:var(--text-500);transition:color .2s ease-out;}
  .crumbs a:hover{color:var(--brand-400);}
  .crumbs svg{color:var(--text-700);}
  .crumbs .current{color:var(--brand-500);}
  .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
  .badge{
    display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
    border-radius:999px;font-size:11.5px;font-weight:500;letter-spacing:.01em;
    border:1px solid var(--line-strong);background:rgba(20,227,180,.12);color:var(--brand-400);
  }
  .badge-amber{border-color:rgba(255,176,32,.4);background:rgba(255,176,32,.12);color:#FFC65C;}
  .badge-neutral{border-color:var(--line);background:rgba(255,255,255,.05);color:var(--text-500);}
  .page-hero h1{
    font-size:clamp(30px,4.6vw,52px);line-height:1.15;font-weight:700;color:var(--text-100);
    letter-spacing:-.005em;max-width:20ch;
  }
  .page-hero h1 em{font-style:normal;color:var(--brand-500);}
  .page-hero-lead{
    margin-top:20px;font-size:16px;line-height:1.85;color:var(--text-300);max-width:62ch;
  }
  .hero-metrics{
    display:flex;flex-wrap:wrap;gap:14px 34px;margin-top:32px;
    padding-top:24px;border-top:1px solid var(--line);
  }
  .hero-metric{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--text-500);}
  .hero-metric svg{color:var(--brand-500);flex:none;}
  .hero-metric b{color:var(--text-100);font-weight:600;font-variant-numeric:tabular-nums;}

  /* ============ 通用板块 ============ */
  .section{padding:88px 0;}
  .section + .section{padding-top:0;}
  .section-head{max-width:64ch;margin-bottom:36px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
    font-size:12.5px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--brand-500);
  }
  .eyebrow::before{content:"";width:18px;height:1px;background:var(--brand-500);}
  h2{
    position:relative;padding-left:14px;font-size:clamp(22px,2.6vw,32px);
    line-height:1.25;font-weight:650;color:var(--text-100);
  }
  h2::before{
    content:"";position:absolute;left:0;top:6px;width:3px;height:18px;
    background:var(--brand-500);border-radius:2px;box-shadow:0 0 10px rgba(20,227,180,.6);
  }
  .section-sub{margin-top:14px;padding-left:14px;font-size:15.5px;line-height:1.8;color:var(--text-500);max-width:62ch;}
  h3{font-size:19px;line-height:1.4;font-weight:600;color:var(--text-100);}
  .divider{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);}

  /* ============ 开始之前 ============ */
  .prep-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
  .prep-card{
    background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:26px 24px;box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
    transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
  }
  .prep-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 30px 64px -30px rgba(0,0,0,.9),0 0 0 1px rgba(20,227,180,.14);}
  .prep-icon{
    width:44px;height:44px;display:flex;align-items:center;justify-content:center;
    border-radius:var(--r-md);background:rgba(20,227,180,.1);border:1px solid var(--line-strong);
    color:var(--brand-500);margin-bottom:18px;
  }
  .prep-card h3{font-size:17px;margin-bottom:10px;}
  .prep-card p{font-size:14.5px;line-height:1.8;color:var(--text-500);}

  /* ============ 时间线 + 目录 ============ */
  .timeline-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:44px;align-items:start;}
  .steps{position:relative;}
  .step{position:relative;display:grid;grid-template-columns:76px minmax(0,1fr);gap:24px;padding-bottom:26px;}
  .step:last-child{padding-bottom:0;}
  .step::before{
    content:"";position:absolute;left:37px;top:62px;bottom:0;width:1px;
    background:linear-gradient(180deg,var(--line-strong),var(--line));
  }
  .step:last-child::before{display:none;}
  .step-num{
    width:76px;height:56px;display:flex;align-items:center;justify-content:center;
    font-size:24px;font-weight:700;letter-spacing:.02em;font-variant-numeric:tabular-nums;
    color:var(--brand-500);background:var(--ink-800);
    border:1px solid var(--line);border-radius:var(--r-md);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
  }
  .step-card{
    background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:24px 26px;box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
    transition:transform .22s ease-out,border-color .22s ease-out;
  }
  .step-card:hover{transform:translateY(-2px);border-color:var(--line-strong);}
  .step-card h3{margin-bottom:10px;}
  .step-card > p{font-size:14.8px;line-height:1.85;color:var(--text-500);}
  .step-tips{display:flex;flex-wrap:wrap;gap:8px 10px;margin-top:16px;}
  .step-tips li{
    display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--text-300);
    background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:999px;padding:4px 11px;
  }
  .step-tips li svg{color:var(--brand-500);flex:none;}
  .toc{
    position:sticky;top:96px;
    background:rgba(16,34,44,.55);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 20px;
    box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  }
  .toc-title{font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-500);margin-bottom:14px;}
  .toc ul{display:flex;flex-direction:column;gap:2px;}
  .toc a{
    display:flex;align-items:center;min-height:40px;padding:0 10px;border-radius:var(--r-sm);
    font-size:14px;color:var(--text-300);border-left:2px solid transparent;
    transition:color .2s ease-out,background-color .2s ease-out,border-color .2s ease-out;
  }
  .toc a:hover{color:var(--text-100);background:rgba(255,255,255,.04);}
  .toc a.is-active{color:var(--brand-500);border-left-color:var(--brand-500);background:rgba(20,227,180,.08);}
  .toc .btn{width:100%;margin-top:18px;}

  /* ============ 图文概览 ============ */
  .figure-block{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:44px;align-items:center;}
  .figure-media{
    position:relative;border-radius:var(--r-lg);overflow:hidden;
    border:1px solid var(--line);background:var(--ink-600);
    box-shadow:var(--shadow-card);aspect-ratio:16/10;
  }
  .figure-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out;}
  .figure-media:hover img{transform:scale(1.03);}
  .figure-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(6,13,18,.05),rgba(6,13,18,.55));
    pointer-events:none;
  }
  .figure-list{display:flex;flex-direction:column;gap:18px;}
  .figure-item{display:flex;gap:14px;padding-bottom:18px;border-bottom:1px solid var(--line);}
  .figure-item:last-child{border-bottom:0;padding-bottom:0;}
  .figure-item .dot{
    flex:none;width:32px;height:32px;border-radius:var(--r-sm);
    display:flex;align-items:center;justify-content:center;
    background:rgba(20,227,180,.1);border:1px solid var(--line-strong);color:var(--brand-500);
  }
  .figure-item h3{font-size:16.5px;margin-bottom:6px;}
  .figure-item p{font-size:14.5px;line-height:1.8;color:var(--text-500);}

  /* ============ 状态信号 ============ */
  .signal-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
  .signal-card{
    background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:24px;box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
    transition:transform .22s ease-out,border-color .22s ease-out;
  }
  .signal-card:hover{transform:translateY(-3px);border-color:var(--line-strong);}
  .signal-head{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
  .signal-dot{width:9px;height:9px;border-radius:50%;flex:none;}
  .signal-dot.ok{background:var(--ok);box-shadow:0 0 10px rgba(53,208,127,.8);}
  .signal-dot.warn{background:var(--warn);box-shadow:0 0 10px rgba(255,176,32,.8);}
  .signal-dot.err{background:var(--err);box-shadow:0 0 10px rgba(255,107,87,.8);}
  .signal-head h3{font-size:16.5px;}
  .signal-card p{font-size:14.5px;line-height:1.8;color:var(--text-500);}
  .signal-tag{margin-top:16px;display:inline-flex;}
  .signal-card ul{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
  .signal-card ul li{position:relative;padding-left:16px;font-size:13.5px;color:var(--text-300);line-height:1.7;}
  .signal-card ul li::before{
    content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:1px;background:var(--brand-500);
  }

  /* ============ FAQ ============ */
  .faq-layout{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:start;}
  .faq-aside p{margin-top:14px;padding-left:14px;font-size:15px;line-height:1.85;color:var(--text-500);max-width:34ch;}
  .faq-aside .btn{margin-top:24px;}
  .faq-list{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{
    display:flex;align-items:center;gap:16px;width:100%;text-align:left;
    padding:18px 4px;min-height:56px;transition:color .2s ease-out;
  }
  .faq-idx{
    font-variant-numeric:tabular-nums;font-size:13px;font-weight:700;color:rgba(20,227,180,.6);
    letter-spacing:.04em;flex:none;width:24px;
  }
  .faq-text{flex:1;font-size:17px;font-weight:600;color:var(--text-100);line-height:1.5;}
  .faq-icon{flex:none;color:var(--text-500);transition:transform .22s ease-out,color .2s ease-out;}
  .faq-q:hover .faq-text{color:var(--brand-400);}
  .faq-q:hover .faq-icon{color:var(--brand-500);}
  .faq-q[aria-expanded="true"] .faq-icon{transform:rotate(45deg);color:var(--brand-500);}
  .faq-a{
    padding:0 4px 20px 44px;font-size:15px;line-height:1.85;color:var(--text-300);max-width:68ch;
  }
  .faq-a[hidden]{display:none;}
  .faq-a-inner{
    background:rgba(16,34,44,.55);border:1px solid var(--line);border-radius:var(--r-md);
    padding:16px 18px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  }

  /* ============ CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-lg);
    background:var(--ink-800);padding:44px 40px;
    box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  }
  .cta-band::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(20,227,180,.7),transparent);
  }
  .cta-band::after{
    content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
    background:radial-gradient(circle,rgba(20,227,180,.14),transparent 68%);pointer-events:none;
  }
  .cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
  .cta-inner h2{padding-left:14px;}
  .cta-inner p{margin-top:12px;padding-left:14px;font-size:15px;color:var(--text-500);max-width:52ch;}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

  /* ============ 页脚 ============ */
  .site-footer{background:#050A0E;border-top:1px solid var(--line);padding:64px 0 0;margin-top:0;}
  .footer-grid{
    display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:32px 24px;
    padding-bottom:48px;border-bottom:1px solid var(--line);
  }
  .f-brand{grid-column:span 5;}
  .f-quick{grid-column:span 2;}
  .f-cat{grid-column:span 2;}
  .f-legal{grid-column:span 3;}
  .f-brand .brand{margin-bottom:16px;}
  .f-brand p{font-size:14px;line-height:1.8;color:var(--text-500);max-width:34ch;}
  .f-contact{margin-top:18px;display:flex;flex-direction:column;gap:6px;font-size:13.5px;color:var(--text-500);}
  .f-contact b{color:var(--text-300);font-weight:500;}
  .f-social{display:flex;gap:10px;margin-top:20px;}
  .f-social a{
    width:44px;height:44px;display:flex;align-items:center;justify-content:center;
    border-radius:var(--r-sm);border:1px solid var(--line);color:var(--text-500);
    transition:color .2s ease-out,border-color .2s ease-out,background-color .2s ease-out,transform .2s ease-out;
  }
  .f-social a:hover{color:var(--brand-500);border-color:var(--line-strong);background:rgba(20,227,180,.08);transform:translateY(-2px);}
  .f-title{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--text-100);margin-bottom:16px;}
  .f-links{display:flex;flex-direction:column;gap:2px;}
  .f-links a{
    display:inline-flex;align-items:center;min-height:40px;font-size:14px;color:var(--text-500);
    border-bottom:2px solid transparent;transition:color .2s ease-out,border-color .2s ease-out;
  }
  .f-links a:hover{color:var(--brand-500);border-bottom-color:var(--brand-500);}
  .f-legal p{font-size:13.5px;line-height:1.85;color:var(--text-500);}
  .f-legal ul{margin-top:14px;display:flex;flex-direction:column;gap:6px;font-size:12.5px;color:var(--text-700);}
  .footer-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
    padding:22px 0 26px;font-size:12.5px;color:var(--text-700);
  }
  .footer-bottom .dot-sep{color:var(--text-700);}

  /* ============ 响应式 ============ */
  @media (max-width:1023px){
    .nav-inner{height:64px;grid-template-columns:1fr auto 1fr;}
    .nav-list,.nav-right .btn{display:none;}
    .nav-right{gap:0;}
    .nav-toggle{display:inline-flex;}
    .brand{position:absolute;left:50%;transform:translateX(-50%);}
    .site-header{position:sticky;}
    .nav-panel{
      display:none;background:var(--ink-800);border-bottom:1px solid var(--line);
      padding:8px 0 18px;
    }
    .nav-panel.is-open{display:block;}
    .nav-panel .container{display:flex;flex-direction:column;gap:2px;}
    .nav-panel a{
      display:flex;align-items:center;min-height:48px;padding:0 4px;
      font-size:15px;color:var(--text-300);border-bottom:1px solid var(--line);
      transition:color .2s ease-out;
    }
    .nav-panel a:hover{color:var(--brand-400);}
    .nav-panel a.is-active{color:var(--brand-500);}
    .nav-panel .btn{margin-top:14px;border-bottom:0;justify-content:center;color:#0A1519;}
    .timeline-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
    .toc{position:static;order:-1;}
    .toc ul{flex-direction:row;flex-wrap:wrap;gap:6px;}
    .toc a{border-left:0;border-bottom:2px solid transparent;min-height:36px;padding:0 8px;font-size:13px;}
    .toc a.is-active{border-left:0;border-bottom-color:var(--brand-500);}
    .toc .btn{display:none;}
    .faq-layout{grid-template-columns:minmax(0,1fr);gap:28px;}
    .figure-block{grid-template-columns:minmax(0,1fr);gap:28px;}
    .footer-grid{gap:32px 20px;}
    .f-brand{grid-column:span 12;}
    .f-quick{grid-column:span 4;}
    .f-cat{grid-column:span 4;}
    .f-legal{grid-column:span 4;}
    .section{padding:64px 0;}
  }
  @media (max-width:767px){
    .prep-grid,.signal-grid{grid-template-columns:minmax(0,1fr);}
    .page-hero-inner{padding:28px 0 44px;}
    .hero-metrics{gap:12px 24px;}
    .step{grid-template-columns:52px minmax(0,1fr);gap:16px;}
    .step-num{width:52px;height:46px;font-size:18px;border-radius:var(--r-sm);}
    .step::before{left:25px;top:52px;}
    .step-card{padding:20px 18px;}
    .cta-band{padding:32px 22px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{flex:1;min-width:160px;}
    .f-quick,.f-cat{grid-column:span 6;}
    .f-legal{grid-column:span 12;}
    .footer-bottom{justify-content:flex-start;}
    .faq-a{padding-left:4px;}
  }
  @media (max-width:519px){
    .container{padding:0 20px;}
    .nav-inner{padding:0 20px;}
    .brand-text{font-size:15px;}
    .section{padding:48px 0;}
    .hero-badges{gap:8px;}
    .faq-text{font-size:15.5px;}
  }
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
    .prep-card:hover,.signal-card:hover,.step-card:hover,.btn:hover,.figure-media:hover img{transform:none !important;}
  }

/* roulang page: category2 */
:root{
  --ink-900:#060D12; --ink-800:#0B1620; --ink-700:#10222C; --ink-600:#16303C;
  --brand-500:#14E3B4; --brand-400:#4CF0C8; --brand-700:#0A8E72;
  --amber-500:#FFB020;
  --text-100:#E6F1F4; --text-300:#C4D4DB; --text-500:#8FA5AE; --text-700:#5E747E;
  --line:rgba(255,255,255,.08); --line-strong:rgba(20,227,180,.35);
  --ok:#35D07F; --warn:#FFB020; --err:#FF6B57;
  --r-lg:16px; --r-md:12px; --r-sm:10px;
  --shadow-card:0 24px 60px -32px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ink-900);color:var(--text-300);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul{list-style:none;padding:0}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-tight{padding:64px 0}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line) 18%,var(--line) 82%,transparent)}
.mono{font-variant-numeric:tabular-nums;letter-spacing:.02em}
::selection{background:rgba(20,227,180,.28);color:#fff}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,13,18,.72);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background-color .22s var(--ease);
}
.site-header.is-scrolled{background:rgba(6,13,18,.94)}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;height:72px;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
}
.nav-left,.nav-right{display:flex;align-items:center;gap:22px}
.nav-left{justify-content:flex-end}
.nav-right{justify-content:flex-start}
.nav-list{display:flex;align-items:center;gap:24px}
.nav-link{
  position:relative;font-size:14.5px;color:var(--text-300);padding:6px 0;
  transition:color .2s var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;width:0;height:2px;
  background:var(--brand-500);transform:translateX(-50%);
  transition:width .22s var(--ease);border-radius:2px;
}
.nav-link:hover{color:var(--text-100)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand-500)}
.nav-link.is-active::after{width:100%}
.nav-link.is-active::before{
  content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--brand-500);
}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand-text{
  font-size:17px;font-weight:600;letter-spacing:.01em;color:var(--text-100);
  white-space:nowrap;
}
.brand:hover .brand-text{color:var(--brand-400)}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:rgba(16,34,44,.7);cursor:pointer;align-items:center;justify-content:center;
  flex-direction:column;gap:4px;transition:border-color .2s var(--ease);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-100);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle:hover{border-color:var(--line-strong)}
.nav-toggle:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-panel{display:none;background:var(--ink-800);border-bottom:1px solid var(--line)}
.nav-panel.is-open{display:block}
.nav-panel .container{
  max-width:1200px;margin:0 auto;padding:10px 24px 20px;
  display:flex;flex-direction:column;
}
.nav-panel a{
  display:flex;align-items:center;min-height:48px;padding:0 6px;
  font-size:15px;color:var(--text-300);border-bottom:1px solid var(--line);
  transition:color .2s var(--ease);
}
.nav-panel a:hover{color:var(--brand-400)}
.nav-panel a.is-active{color:var(--brand-500)}
.nav-panel a.btn{margin-top:14px;justify-content:center;border-bottom:0;min-height:48px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.btn-brand{
  background:var(--amber-500);color:#08110F;
  box-shadow:0 0 0 1px rgba(255,176,32,.45),0 14px 34px -12px rgba(255,176,32,.55);
}
.btn-brand:hover{background:#FFC24A;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,176,32,.65),0 18px 42px -12px rgba(255,176,32,.6)}
.btn-brand:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-100)}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--brand-400);background:rgba(20,227,180,.06)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:38px;font-size:14px;padding:0 15px}
.btn .arw{transition:transform .2s var(--ease)}
.btn:hover .arw{transform:translateX(3px)}

/* ============ 徽章 / 面包屑 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
  border-radius:999px;font-size:11.5px;font-weight:600;line-height:1;
}
.badge-brand{border:1px solid var(--line-strong);background:rgba(20,227,180,.12);color:var(--brand-400)}
.badge-warn{border:1px solid rgba(255,176,32,.42);background:rgba(255,176,32,.1);color:var(--amber-500)}
.badge-muted{border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text-500)}
.crumbs{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-500);flex-wrap:wrap}
.crumbs a{color:var(--text-500);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--brand-400)}
.crumbs .now{color:var(--brand-500)}
.crumbs svg{opacity:.6;flex:none}

/* ============ 页头横幅 ============ */
.page-hero{
  position:relative;overflow:hidden;
  background-image:
    linear-gradient(180deg,rgba(6,13,18,.88),rgba(6,13,18,.96)),
    radial-gradient(60% 70% at 12% 6%,rgba(20,227,180,.16),transparent 62%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover,cover,cover;
  background-position:center,center,center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:40px 40px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 82%);
  mask-image:linear-gradient(180deg,#000,transparent 82%);
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(20,227,180,.65),transparent);
}
.page-hero .wrap{position:relative;z-index:1;padding-top:64px;padding-bottom:64px}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);line-height:1.15;font-weight:700;
  color:var(--text-100);letter-spacing:-.01em;margin:20px 0 18px;max-width:20ch;
}
.page-hero h1 em{font-style:normal;color:var(--brand-400)}
.page-hero .lead{font-size:17px;line-height:1.8;color:var(--text-300);max-width:52ch}
.hero-metrics{display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;margin-top:30px}
.hero-metrics .m{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-500)}
.hero-metrics .m b{color:var(--text-100);font-weight:700;font-size:16px}
.hero-metrics .dot{width:4px;height:4px;border-radius:50%;background:var(--text-700)}

/* ============ 通用标题 ============ */
.sec-head{max-width:62ch;margin-bottom:36px}
.sec-title{
  position:relative;padding-left:16px;
  font-size:clamp(22px,2.6vw,34px);line-height:1.25;font-weight:650;
  color:var(--text-100);letter-spacing:-.005em;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:.62em;border-radius:2px;background:var(--brand-500);
}
.sec-sub{margin-top:14px;font-size:15.5px;line-height:1.8;color:var(--text-500)}

/* ============ 提示条 ============ */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px 18px;border-radius:var(--r-md);
  border:1px solid rgba(255,176,32,.42);
  background:rgba(255,176,32,.08);
}
.notice .nt-ic{flex:none;color:var(--amber-500);margin-top:2px}
.notice .nt-title{font-size:14.5px;font-weight:600;color:#FFD37A;margin-bottom:2px}
.notice p{font-size:14px;line-height:1.75;color:var(--text-300)}

/* ============ 风险 / 措施 对照 ============ */
.compare{
  display:grid;grid-template-columns:1fr 48px 1fr;
  background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow-card);overflow:hidden;
}
.compare-col{padding:30px 28px}
.compare-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.compare-head h3{font-size:15px;font-weight:600;letter-spacing:.01em}
.compare-head.risk h3{color:var(--text-500)}
.compare-head.safe h3{color:var(--brand-500)}
.compare-mid{position:relative;display:flex;align-items:center;justify-content:center}
.compare-mid::before{
  content:"";position:absolute;top:18px;bottom:18px;left:50%;
  border-left:1px dashed rgba(255,255,255,.16);
}
.compare-badge{
  position:relative;z-index:1;width:44px;height:44px;border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink-800);border:1px solid var(--line-strong);
  color:var(--brand-500);font-size:12px;font-weight:600;
}
.cmp-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:13px 0;border-bottom:1px solid var(--line);
  font-size:15px;line-height:1.7;
}
.cmp-item:last-child{border-bottom:0;padding-bottom:0}
.cmp-item .ic{flex:none;margin-top:3px}
.risk .cmp-item{color:var(--text-500)}
.risk .cmp-item .ic{color:var(--text-700)}
.safe .cmp-item{color:var(--text-300)}
.safe .cmp-item .ic{color:var(--brand-500)}

/* ============ 自检清单 ============ */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.check-card{
  display:flex;gap:16px;padding:24px;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.check-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 30px 64px -30px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.08)}
.check-ic{
  flex:none;width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(20,227,180,.1);border:1px solid var(--line-strong);color:var(--brand-500);
}
.check-card h3{font-size:17px;font-weight:600;color:var(--text-100);margin-bottom:6px}
.check-card p{font-size:14.5px;line-height:1.75;color:var(--text-500)}

/* ============ 图文核对区 ============ */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.media{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  background:var(--ink-600);border:1px solid var(--line);aspect-ratio:16/10;
}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.media:hover img{transform:scale(1.03)}
.split-body h2{position:relative;padding-left:16px;font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:650;color:var(--text-100)}
.split-body h2::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:.62em;border-radius:2px;background:var(--brand-500);
}
.split-body > p{margin-top:16px;font-size:15.5px;line-height:1.85;color:var(--text-300)}
.point-list{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.point-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-300)}
.point-list .ic{flex:none;margin-top:3px;color:var(--brand-500)}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{
  position:relative;padding:26px 22px 24px;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.step:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.step-num{
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
  font-size:32px;font-weight:700;line-height:1;color:rgba(20,227,180,.4);margin-bottom:14px;
}
.step h3{font-size:17px;font-weight:600;color:var(--text-100);margin-bottom:8px}
.step p{font-size:14px;line-height:1.75;color:var(--text-500)}
.step::after{
  content:"";position:absolute;left:0;top:26px;bottom:26px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand-500),transparent);opacity:.5;
}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.faq-side p{margin-top:14px;font-size:15px;line-height:1.8;color:var(--text-500);max-width:34ch}
.faq-side .btn{margin-top:24px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;
  padding:18px 0;background:none;border:0;cursor:pointer;text-align:left;
  color:var(--text-100);font-size:17px;font-weight:600;line-height:1.5;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-400)}
.faq-q:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.faq-idx{font-variant-numeric:tabular-nums;font-size:13px;font-weight:700;letter-spacing:.04em;color:rgba(20,227,180,.6);min-width:22px;flex:none}
.faq-ic{margin-left:auto;flex:none;color:var(--brand-500);transition:transform .22s var(--ease)}
.faq-item.is-open .faq-ic{transform:rotate(45deg)}
.faq-a{
  display:none;padding:0 0 20px 38px;
  font-size:15px;line-height:1.85;color:var(--text-300);max-width:68ch;
}
.faq-item.is-open .faq-a{display:block}
.faq-item.is-open .faq-q{color:var(--brand-400)}

/* ============ CTA 条 ============ */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  padding:34px 36px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(16,34,44,.92),rgba(11,22,32,.96));
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);line-height:1.35;font-weight:650;color:var(--text-100)}
.cta-band p{margin-top:8px;font-size:14.5px;line-height:1.75;color:var(--text-500);max-width:52ch}

/* ============ 页脚 ============ */
.site-footer{background:#050A0E;border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:5fr 2fr 2fr 3fr;gap:36px}
.f-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-500);max-width:26ch}
.f-contact{margin-top:18px;display:flex;flex-direction:column;gap:6px;font-size:13.5px;color:var(--text-500)}
.f-contact b{color:var(--text-300);font-weight:600}
.f-social{display:flex;gap:10px;margin-top:20px}
.f-social a{
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--text-500);
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.f-social a:hover{color:var(--brand-500);border-color:var(--line-strong);transform:translateY(-2px)}
.f-social a:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.f-title{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--text-100);margin-bottom:16px}
.f-links{display:flex;flex-direction:column;gap:10px}
.f-links a{
  font-size:14px;color:var(--text-500);
  transition:color .2s var(--ease);display:inline-block;
}
.f-links a:hover{color:var(--brand-500);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
.f-legal p{font-size:13.5px;line-height:1.85;color:var(--text-500);margin-bottom:10px}
.f-legal b{color:var(--text-300);font-weight:600}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--line);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;
  font-size:12.5px;color:var(--text-700);
}
.footer-bottom .sep{color:var(--text-700);opacity:.7}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-inner{display:flex;justify-content:center;position:relative;height:64px;padding:0 20px}
  .nav-left,.nav-right{display:none}
  .brand{position:absolute;left:50%;transform:translateX(-50%)}
  .nav-toggle{display:flex;position:absolute;right:20px;top:50%;transform:translateY(-50%)}
  .split{grid-template-columns:1fr;gap:32px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .faq-layout{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .f-brand{grid-column:1/-1}
}
@media (min-width:1024px){
  .nav-panel{display:none !important}
}
@media (max-width:768px){
  .wrap{padding:0 20px}
  .section{padding:52px 0}
  .section-tight{padding:44px 0}
  .page-hero .wrap{padding-top:44px;padding-bottom:44px}
  .page-hero h1{max-width:none}
  .hero-metrics{gap:10px 18px}
  .compare{grid-template-columns:1fr}
  .compare-col{padding:24px 20px}
  .compare-mid{height:46px}
  .compare-mid::before{
    top:50%;left:18px;right:18px;bottom:auto;border-left:0;
    border-top:1px dashed rgba(255,255,255,.16);
  }
  .check-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:26px 22px}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .faq-a{padding-left:0}
}
@media (max-width:520px){
  .brand-text{font-size:15.5px}
  .btn{width:100%}
  .nav-panel a.btn{width:100%}
  .hero-metrics .m{font-size:12.5px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
  .check-card:hover,.step:hover,.media:hover img,.f-social a:hover{transform:none}
}

/* roulang page: category3 */
:root{
  --ink-900:#060D12;
  --ink-800:#0B1620;
  --ink-700:#10222C;
  --ink-600:#16303C;
  --brand-500:#14E3B4;
  --brand-400:#4CF0C8;
  --brand-700:#0A8E72;
  --amber-500:#FFB020;
  --text-100:#E6F1F4;
  --text-300:#C4D4DB;
  --text-500:#8FA5AE;
  --text-700:#5E747E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(20,227,180,.35);
  --ok:#35D07F;
  --warn:#FFB020;
  --err:#FF6B57;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --shadow-card:0 24px 60px -32px rgba(0,0,0,.85);
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-300);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,13,18,.72);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .22s ease-out;
}
.site-header.is-scrolled{background:rgba(6,13,18,.93)}
.nav-inner{
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
  height:72px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
}
.nav-left{display:flex;justify-content:flex-end}
.nav-right{display:flex;justify-content:flex-start;align-items:center;gap:20px}
.nav-list{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  font-size:14.5px;
  color:var(--text-300);
  transition:color .18s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:6px;width:0;height:2px;
  background:var(--brand-500);transform:translateX(-50%);
  transition:width .2s ease-out;
}
.nav-link:hover{color:var(--text-100)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand-500)}
.nav-link.is-active::after{width:0}
.nav-link.is-active::before{
  content:"";position:absolute;left:-11px;top:50%;width:5px;height:5px;
  border-radius:50%;background:var(--brand-500);transform:translateY(-50%);
}
.brand{display:inline-flex;align-items:center;gap:9px;color:var(--text-100);min-height:44px}
.brand svg{flex:none}
.brand-text{font-size:17px;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.brand:hover .brand-text{color:var(--brand-400)}
.brand-text{transition:color .18s ease-out}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;
  border:1px solid var(--line);border-radius:var(--r-sm);
  transition:border-color .18s ease-out;
}
.nav-toggle:hover{border-color:var(--line-strong)}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--text-100);transition:transform .2s ease-out,opacity .2s ease-out}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}

.nav-panel{display:none;background:var(--ink-800);border-bottom:1px solid var(--line)}
.nav-panel.is-open{display:block}
.nav-panel .container{display:flex;flex-direction:column;padding-top:6px;padding-bottom:18px}
.nav-panel a{
  display:flex;align-items:center;min-height:48px;padding:0 4px;
  font-size:15px;color:var(--text-300);border-bottom:1px solid var(--line);
  transition:color .18s ease-out;
}
.nav-panel a:hover{color:var(--brand-400)}
.nav-panel a.is-active{color:var(--brand-500)}
.nav-panel a.btn{margin-top:16px;border:0;justify-content:center;background:var(--amber-500);color:#1A1204;font-weight:600}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-sm);
  font-size:14.5px;font-weight:600;letter-spacing:.01em;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn-sm{min-height:38px;padding:0 16px;font-size:13.5px}
.btn-brand{
  background:var(--amber-500);color:#1A1204;
  box-shadow:0 0 0 1px rgba(255,176,32,.35),0 14px 34px -14px rgba(255,176,32,.6);
}
.btn-brand:hover{background:#FFC24D;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,176,32,.5),0 18px 40px -14px rgba(255,176,32,.7)}
.btn-brand:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;border:1px solid var(--line);color:var(--text-100);
}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--brand-400);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-arrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand-500);font-size:14px;font-weight:600;min-height:44px}
.btn-arrow svg{transition:transform .2s ease-out}
.btn-arrow:hover{color:var(--brand-400)}
.btn-arrow:hover svg{transform:translateX(4px)}

/* ---------- 页面头部 ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:
    radial-gradient(60% 90% at 0% 0%, rgba(20,227,180,.16), transparent 68%),
    linear-gradient(180deg, rgba(6,13,18,.88), rgba(6,13,18,.96)),
    url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:40px 40px;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(20,227,180,.8),transparent);
}
.page-hero .container{position:relative;z-index:1;padding-top:72px;padding-bottom:56px}

.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12.5px;color:var(--text-500);margin-bottom:22px;
}
.crumbs a{color:var(--text-500);transition:color .18s ease-out}
.crumbs a:hover{color:var(--brand-400)}
.crumbs .sep{color:var(--text-700);display:inline-flex;align-items:center}
.crumbs .current{color:var(--brand-500)}

.hero-badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:999px;
  font-size:11.5px;font-weight:500;
  border:1px solid rgba(20,227,180,.45);
  background:rgba(20,227,180,.12);
  color:var(--brand-400);
}
.chip-amber{border-color:rgba(255,176,32,.45);background:rgba(255,176,32,.1);color:#FFC85A}

.page-title{
  font-size:clamp(28px,4vw,46px);
  line-height:1.16;
  font-weight:700;
  color:var(--text-100);
  letter-spacing:.005em;
  max-width:20ch;
}
.page-title em{font-style:normal;color:var(--brand-500)}
.page-lead{
  margin-top:18px;max-width:62ch;
  font-size:16px;line-height:1.85;color:var(--text-300);
}
.hero-metrics{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:30px;font-size:13.5px;color:var(--text-500);
}
.hero-metrics .m{display:inline-flex;align-items:baseline;gap:7px}
.hero-metrics b{
  font-size:20px;font-weight:700;color:var(--text-100);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.hero-metrics .dot{color:var(--text-700)}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0}
.section-tight{padding:56px 0 88px}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:62ch;margin-bottom:36px}
.section-head h2{
  position:relative;padding-left:14px;
  font-size:clamp(22px,2.6vw,34px);
  line-height:1.25;font-weight:650;color:var(--text-100);
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.42em;
  width:3px;height:18px;border-radius:2px;background:var(--brand-500);
}
.section-head p{margin-top:14px;color:var(--text-500);font-size:15px;max-width:62ch}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px}

/* ---------- 适配矩阵 ---------- */
.adapt-group{margin-bottom:34px}
.adapt-group:last-of-type{margin-bottom:0}
.group-label{
  display:flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--text-500);
  margin-bottom:16px;
}
.group-label::after{content:"";flex:1;height:1px;background:var(--line)}
.adapt-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.device-card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.device-card:hover{
  transform:translateY(-3px);
  border-color:var(--line-strong);
  box-shadow:0 32px 70px -30px rgba(0,0,0,.95), inset 0 1px 0 rgba(255,255,255,.08);
}
.device-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.device-card h3{font-size:19px;line-height:1.4;font-weight:600;color:var(--text-100)}
.device-card .device-icon{color:var(--brand-500);flex:none;opacity:.85}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;font-size:11.5px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text-300);
}
.badge{
  display:inline-flex;align-items:center;gap:5px;
  height:24px;padding:0 10px;border-radius:999px;
  font-size:11.5px;font-weight:600;white-space:nowrap;
}
.badge-ok{border:1px solid rgba(20,227,180,.45);background:rgba(20,227,180,.12);color:var(--brand-400)}
.badge-warn{border:1px solid rgba(255,176,32,.45);background:rgba(255,176,32,.1);color:#FFC85A}
.badge-neutral{border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text-500)}
.device-note{font-size:13.5px;line-height:1.7;color:var(--text-500);margin-top:auto}

/* ---------- 终端图标条 ---------- */
.terminal-strip{
  margin-top:34px;
  display:grid;grid-template-columns:repeat(6,1fr);gap:12px;
  padding:22px;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--ink-800);
}
.terminal-item{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  padding:12px 8px;border-radius:var(--r-md);
  color:var(--text-500);font-size:12.5px;
  transition:color .2s ease-out,background .2s ease-out;
}
.terminal-item:hover{color:var(--brand-400);background:rgba(20,227,180,.06)}
.terminal-item svg{color:var(--brand-500);opacity:.8}
.terminal-item:hover svg{opacity:1}

/* ---------- 图文说明 ---------- */
.split{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.figure-card{
  margin:0;border-radius:14px;overflow:hidden;
  border:1px solid var(--line);background:var(--ink-600);
  box-shadow:var(--shadow-card);
}
.figure-card .fig-media{aspect-ratio:16/10;overflow:hidden;background:var(--ink-600)}
.figure-card img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.figure-card:hover img{transform:scale(1.03)}
.figure-card figcaption{
  padding:12px 16px;font-size:12.5px;color:var(--text-500);
  border-top:1px solid var(--line);background:var(--ink-800);
}
.note-list{display:grid;gap:16px;margin-top:22px}
.note-item{display:flex;gap:12px;align-items:flex-start;font-size:15px;line-height:1.8;color:var(--text-300)}
.note-item svg{flex:none;margin-top:5px;color:var(--brand-500)}

/* ---------- 现象与处理对照 ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:8px}
.compare-col{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
}
.compare-col h3{
  font-size:13px;letter-spacing:.06em;font-weight:600;margin-bottom:18px;
  color:var(--text-500);text-transform:none;
}
.compare-col.accent h3{color:var(--brand-500)}
.compare-item{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15px;line-height:1.7;color:var(--text-300);
  padding:12px 0;border-bottom:1px dashed var(--line);
}
.compare-item:last-child{border-bottom:0;padding-bottom:0}
.compare-item svg{flex:none;margin-top:4px;color:var(--text-700)}
.compare-col.accent .compare-item svg{color:var(--brand-500)}
.compare-col.accent .compare-item{color:var(--text-100)}

/* ---------- 自检步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step-card{
  position:relative;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px 24px;
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,border-color .22s ease-out;
}
.step-card:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.step-num{
  display:block;font-size:26px;font-weight:700;letter-spacing:.02em;
  font-variant-numeric:tabular-nums;color:rgba(20,227,180,.55);
  margin-bottom:12px;
}
.step-card h3{font-size:17px;font-weight:600;color:var(--text-100);margin-bottom:10px}
.step-card p{font-size:14px;line-height:1.8;color:var(--text-500)}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.faq-aside h2{
  position:relative;padding-left:14px;
  font-size:clamp(22px,2.6vw,34px);line-height:1.25;font-weight:650;color:var(--text-100);
}
.faq-aside h2::before{
  content:"";position:absolute;left:0;top:.42em;width:3px;height:18px;
  border-radius:2px;background:var(--brand-500);
}
.faq-aside p{margin:16px 0 24px;font-size:15px;color:var(--text-500);max-width:38ch}
.acc{border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line);transition:background .2s ease-out}
.acc-item.is-open{
  background:rgba(16,34,44,.55);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:inset 0 0 0 1px var(--line);
  border-radius:var(--r-md);
}
.acc-btn{
  display:flex;align-items:center;gap:14px;width:100%;
  padding:18px 14px;text-align:left;min-height:44px;
}
.acc-num{
  font-size:12.5px;font-weight:700;font-variant-numeric:tabular-nums;
  color:rgba(20,227,180,.6);flex:none;
}
.acc-q{flex:1;font-size:17px;font-weight:600;line-height:1.5;color:var(--text-100)}
.acc-icon{flex:none;color:var(--brand-500);transition:transform .2s ease-out}
.acc-btn[aria-expanded="true"] .acc-icon{transform:rotate(45deg)}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .24s ease-out}
.acc-panel-inner{
  padding:0 14px 18px 48px;font-size:15px;line-height:1.85;
  color:var(--text-300);max-width:68ch;
}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding:36px;
  border:1px solid var(--line-strong);
  border-radius:var(--r-lg);
  background:
    radial-gradient(80% 130% at 0% 0%, rgba(20,227,180,.12), transparent 62%),
    var(--ink-800);
  box-shadow:var(--shadow-card);
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);font-weight:650;color:var(--text-100);line-height:1.35}
.cta-band p{margin-top:10px;font-size:15px;color:var(--text-500);max-width:52ch}

/* ---------- 页脚 ---------- */
.site-footer{background:#050A0E;border-top:1px solid var(--line);padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:32px}
.f-brand{grid-column:span 5}
.f-quick,.f-cat{grid-column:span 2}
.f-legal{grid-column:span 3}
.f-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-500);max-width:34ch}
.f-contact{margin-top:18px;font-size:13.5px;line-height:1.9;color:var(--text-500)}
.f-contact b{color:var(--text-300);font-weight:500}
.f-social{display:flex;gap:10px;margin-top:20px}
.f-social a{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line);color:var(--text-500);
  transition:color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.f-social a:hover{color:var(--brand-400);border-color:var(--line-strong);transform:translateY(-2px)}
.f-title{font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--text-100);margin-bottom:16px}
.f-links li{margin-bottom:2px}
.f-links a{
  display:inline-flex;align-items:center;min-height:34px;
  font-size:14px;color:var(--text-500);
  border-bottom:2px solid transparent;
  transition:color .18s ease-out,border-color .18s ease-out;
}
.f-links a:hover{color:var(--brand-400);border-bottom-color:rgba(20,227,180,.5)}
.f-legal p{font-size:13.5px;line-height:1.85;color:var(--text-500)}
.f-legal .f-meta{margin-top:14px;font-size:12.5px;color:var(--text-700);line-height:1.9}
.footer-bottom{
  margin-top:44px;padding:20px 0 28px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:12.5px;color:var(--text-700);
}
.footer-bottom .dot{color:var(--text-700)}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .adapt-row,.steps{gap:20px}
}

@media (max-width:1023px){
  .nav-inner{height:64px;padding:0 20px}
  .nav-list{display:none}
  .nav-right{display:none}
  .nav-left{display:none}
  .brand{grid-column:2;justify-self:center}
  .nav-toggle{display:flex;grid-column:3;justify-self:end}
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section-tight{padding:48px 0 64px}
  .page-hero .container{padding-top:52px;padding-bottom:44px}
  .adapt-row{grid-template-columns:repeat(2,1fr)}
  .terminal-strip{grid-template-columns:repeat(3,1fr)}
  .split{grid-template-columns:1fr;gap:32px}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .compare{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .f-brand{grid-column:span 12}
  .f-quick,.f-cat{grid-column:span 6}
  .f-legal{grid-column:span 12}
  .cta-band{padding:28px}
}

@media (max-width:640px){
  body{font-size:15.5px}
  .section{padding:48px 0}
  .adapt-row{grid-template-columns:1fr}
  .terminal-strip{grid-template-columns:repeat(2,1fr);padding:16px;gap:8px}
  .page-title{max-width:100%}
  .hero-metrics{font-size:13px;gap:8px 14px}
  .hero-metrics b{font-size:18px}
  .acc-btn{padding:16px 10px;gap:10px}
  .acc-q{font-size:15.5px}
  .acc-panel-inner{padding-left:10px;padding-right:10px}
  .f-brand,.f-quick,.f-cat,.f-legal{grid-column:span 12}
  .btn{min-height:48px}
  .btn-sm{min-height:44px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:24px}
  .cta-band .btn{width:100%}
}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
  .device-card:hover,.step-card:hover,.btn:hover,.f-social a:hover{transform:none !important}
  .figure-card:hover img{transform:none !important}
}

/* roulang page: category4 */
:root{
  --ink-900:#060D12;
  --ink-800:#0B1620;
  --ink-700:#10222C;
  --ink-600:#16303C;
  --brand-500:#14E3B4;
  --brand-400:#4CF0C8;
  --brand-700:#0A8E72;
  --amber-500:#FFB020;
  --text-100:#E6F1F4;
  --text-300:#C4D4DB;
  --text-500:#8FA5AE;
  --text-700:#5E747E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(20,227,180,.35);
  --ok:#35D07F;
  --warn:#FFB020;
  --err:#FF6B57;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --shadow-card:0 24px 60px -32px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
.site-body{
  margin:0;
  padding:0;
  background:var(--ink-900);
  color:var(--text-300);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:52px 0}
@media(min-width:768px){.section{padding:64px 0}}
@media(min-width:1024px){.section{padding:88px 0}}
.section + .section{border-top:1px solid rgba(255,255,255,.05)}
.section-head{max-width:760px;margin-bottom:32px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;color:var(--brand-500);text-transform:uppercase;margin-bottom:12px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand-500);opacity:.7}
h2.section-title{position:relative;font-size:clamp(22px,2.6vw,32px);line-height:1.28;font-weight:650;color:var(--text-100);padding-left:14px;letter-spacing:-.01em}
h2.section-title::before{content:"";position:absolute;left:0;top:8px;width:3px;height:18px;border-radius:2px;background:var(--brand-500)}
.section-desc{margin-top:14px;font-size:15px;line-height:1.8;color:var(--text-500);max-width:62ch}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 20px;border-radius:var(--r-sm);
  font-size:14.5px;font-weight:600;line-height:1;letter-spacing:.01em;
  transition:transform .2s var(--ease),box-shadow .22s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn svg{flex:none}
.btn-brand{
  background:var(--brand-500);color:#04140F;
  box-shadow:0 0 0 1px rgba(20,227,180,.45),0 14px 34px -12px rgba(20,227,180,.55);
}
.btn-brand:hover{background:var(--brand-400);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(76,240,200,.75),0 18px 40px -12px rgba(20,227,180,.6)}
.btn-amber{
  background:var(--amber-500);color:#1A1200;
  box-shadow:0 0 0 1px rgba(255,176,32,.4),0 16px 38px -14px rgba(255,176,32,.6);
}
.btn-amber:hover{background:#FFC24D;transform:translateY(-1px)}
.btn-ghost{
  border:1px solid var(--line);color:var(--text-100);background:rgba(255,255,255,.02);
}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--brand-400);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.btn-block{width:100%}
.btn-text{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--brand-500)}
.btn-text svg{transition:transform .2s var(--ease)}
.btn-text:hover{color:var(--brand-400)}
.btn-text:hover svg{transform:translateX(4px)}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;
  font-size:11.5px;line-height:1;letter-spacing:.04em;white-space:nowrap;
  border:1px solid rgba(20,227,180,.4);color:var(--brand-400);background:rgba(20,227,180,.12);
}
.badge-amber{border-color:rgba(255,176,32,.42);color:#FFC85C;background:rgba(255,176,32,.1)}
.badge-muted{border-color:var(--line);color:var(--text-500);background:rgba(255,255,255,.04)}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,13,18,.72);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.site-header.is-scrolled{background:rgba(6,13,18,.94)}
.nav-inner{
  position:relative;max-width:1200px;margin:0 auto;padding:0 24px;height:72px;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;
}
.nav-left{display:flex;justify-content:flex-end;min-width:0}
.nav-right{display:flex;align-items:center;justify-content:flex-start;gap:26px;min-width:0}
.nav-list{display:flex;align-items:center;gap:26px}
.brand{display:inline-flex;align-items:center;gap:10px;padding:6px 0}
.brand-text{font-size:17px;font-weight:600;letter-spacing:.01em;color:var(--text-100);white-space:nowrap}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:12px 0;font-size:14.5px;line-height:1;color:var(--text-300);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:4px;width:0;height:2px;border-radius:2px;
  background:var(--brand-500);transform:translateX(-50%);
  transition:width .22s var(--ease);
}
.nav-link:hover{color:var(--text-100)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand-500)}
.nav-link.is-active::before{
  content:"";position:absolute;left:-13px;top:50%;width:5px;height:5px;border-radius:50%;
  background:var(--brand-500);transform:translateY(-50%);
}
.nav-link.is-active::after{width:100%}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;justify-self:end;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--line-strong);background:rgba(20,227,180,.06)}
.nav-toggle span{display:block;width:18px;height:1.6px;border-radius:2px;background:var(--text-100);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
.nav-panel{display:none}
.nav-panel.open{display:block}

@media(max-width:1023px){
  .nav-inner{height:64px;grid-template-columns:1fr auto 1fr;padding:0 20px}
  .nav-left,.nav-right{display:none}
  .brand{position:absolute;left:50%;transform:translateX(-50%)}
  .brand-text{font-size:16px}
  .nav-toggle{display:flex;grid-column:3}
  .nav-panel{
    background:var(--ink-800);border-bottom:1px solid var(--line);
    padding:6px 0 18px;
  }
  .nav-panel .container{display:flex;flex-direction:column;padding:0 20px}
  .nav-panel a{
    display:flex;align-items:center;min-height:48px;font-size:15px;color:var(--text-300);
    border-bottom:1px solid rgba(255,255,255,.05);transition:color .2s var(--ease),padding-left .2s var(--ease);
  }
  .nav-panel a:hover{color:var(--brand-400);padding-left:4px}
  .nav-panel a.is-active{color:var(--brand-500)}
  .nav-panel a.btn{margin-top:16px;justify-content:center;color:#04140F;border-bottom:0;min-height:46px;padding:0 20px}
  .nav-panel a.btn:hover{color:#04140F;padding-left:20px}
}

/* 页头横幅 */
.page-hero{
  position:relative;overflow:hidden;
  padding:44px 0 56px;
  border-bottom:1px solid var(--line);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(180deg,rgba(6,13,18,.88) 0%,rgba(6,13,18,.96) 100%),
    radial-gradient(60% 78% at 6% 0%,rgba(20,227,180,.16) 0%,rgba(20,227,180,0) 70%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover,cover,cover;
  background-position:center,center,center;
  background-repeat:no-repeat;
}
.page-hero::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(20,227,180,0),rgba(20,227,180,.85),rgba(20,227,180,0));
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.9;
  background-image:
    linear-gradient(to right,rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:40px 40px,40px 40px;
  -webkit-mask-image:radial-gradient(80% 90% at 50% 10%,#000 0%,transparent 85%);
  mask-image:radial-gradient(80% 90% at 50% 10%,#000 0%,transparent 85%);
}
.hero-inner{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:0 24px}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:12.5px;line-height:1.6;color:var(--text-500);margin-bottom:22px}
.breadcrumb a{color:var(--text-500);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--brand-400)}
.breadcrumb .sep{opacity:.55}
.breadcrumb .current{color:var(--brand-500)}
.hero-bages{display:flex;flex-wrap:wrap;gap:10px}
.page-title{
  font-size:clamp(29px,4.4vw,50px);line-height:1.16;font-weight:700;letter-spacing:-.015em;
  color:var(--text-100);margin:16px 0 16px;max-width:22ch;
}
.page-title em{font-style:normal;color:var(--brand-500);position:relative;white-space:nowrap}
.page-title em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:3px;border-radius:2px;
  background:linear-gradient(90deg,rgba(20,227,180,.85),rgba(20,227,180,0));
}
.page-sub{font-size:15.5px;line-height:1.8;color:var(--text-300);max-width:60ch}
.hero-metrics{display:flex;flex-wrap:wrap;gap:14px 36px;margin-top:28px;padding-top:24px;border-top:1px solid var(--line);max-width:820px}
.hero-metric{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--text-500)}
.hero-metric svg{color:var(--brand-500);flex:none}
.hero-metric b{font-size:15px;color:var(--text-100);font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:.02em}
@media(min-width:1024px){.page-hero{padding:56px 0 72px}}

/* FAQ 工具条 */
.faq-toolbar{
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:rgba(16,34,44,.55);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset,var(--shadow-card);
  padding:20px;
  display:grid;gap:18px;
}
@media(min-width:768px){.faq-toolbar{padding:24px 26px;grid-template-columns:auto 1fr;align-items:center;gap:24px}}
.search-box{position:relative;width:100%;max-width:560px}
.search-box svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-700);pointer-events:none}
.search-box input{
  width:100%;height:46px;padding:0 14px 0 44px;border-radius:var(--r-sm);
  background:#0A1519;border:1px solid var(--line);color:var(--text-100);
  font-size:14.5px;line-height:1;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-box input::placeholder{color:var(--text-700)}
.search-box input:hover{border-color:rgba(255,255,255,.16)}
.search-box input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(20,227,180,.18)}
.anchor-list{display:flex;flex-wrap:wrap;gap:10px}
.anchor-list a{
  display:inline-flex;align-items:center;height:38px;padding:0 15px;border-radius:999px;
  border:1px solid var(--line);font-size:13.5px;color:var(--text-300);background:rgba(255,255,255,.02);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
}
.anchor-list a:hover{border-color:var(--line-strong);color:var(--brand-400);background:rgba(20,227,180,.07);transform:translateY(-1px)}

/* FAQ 布局 */
.faq-layout{display:grid;grid-template-columns:1fr;gap:28px;margin-top:34px}
@media(min-width:1024px){.faq-layout{grid-template-columns:236px minmax(0,1fr);gap:44px}}
.faq-side{align-self:start}
@media(min-width:1024px){.faq-side{position:sticky;top:96px}}
.side-card{
  border-radius:var(--r-lg);border:1px solid var(--line);background:var(--ink-700);
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset,var(--shadow-card);
  padding:20px;
}
.side-card .side-title{font-size:13px;letter-spacing:.08em;color:var(--text-500);margin-bottom:14px}
.side-nav{display:flex;flex-direction:column;gap:2px}
.side-nav a{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:44px;padding:0 12px;border-radius:var(--r-sm);
  font-size:14px;color:var(--text-300);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.side-nav a svg{color:var(--text-700);transition:color .2s var(--ease)}
.side-nav a:hover{background:rgba(255,255,255,.04);color:var(--text-100)}
.side-nav a:hover svg{color:var(--brand-500)}
.side-nav a.is-current{background:rgba(20,227,180,.1);color:var(--brand-400)}
.side-nav a.is-current::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:2px;border-radius:2px;background:var(--brand-500)}
.side-nav a.is-current svg{color:var(--brand-500)}
.side-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:12.5px;line-height:1.7;color:var(--text-500)}

.faq-group{margin-bottom:34px;scroll-margin-top:96px}
.faq-group:last-of-type{margin-bottom:0}
.faq-group-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.faq-group-head h2{font-size:20px;line-height:1.4;font-weight:600;color:var(--text-100);letter-spacing:-.005em}
.faq-item{
  border-top:1px solid var(--line);
  padding:0 12px;border-radius:var(--r-md);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item.open{
  background:rgba(16,34,44,.55);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);
}
.faq-q{
  display:flex;align-items:flex-start;gap:14px;width:100%;
  padding:18px 0;text-align:left;color:var(--text-100);
  font-size:16.5px;line-height:1.55;font-weight:500;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-400)}
.faq-num{
  flex:none;min-width:22px;padding-top:4px;
  font-size:12.5px;letter-spacing:.04em;color:rgba(20,227,180,.6);
  font-variant-numeric:tabular-nums;
}
.faq-q-text{flex:1;min-width:0}
.faq-sign{
  flex:none;width:24px;height:24px;margin-top:1px;color:var(--text-500);
  transition:transform .24s var(--ease),color .2s var(--ease);
}
.faq-item.open .faq-sign{transform:rotate(45deg);color:var(--brand-500)}
.faq-a{display:none;padding:0 0 20px 36px}
.faq-item.open .faq-a{display:block}
.faq-a p{font-size:15px;line-height:1.85;color:var(--text-300);max-width:68ch}
.faq-a p + p{margin-top:10px}
.faq-a strong{color:var(--text-100);font-weight:600}
.faq-empty{display:none;margin-top:18px;padding:22px;border-radius:var(--r-md);border:1px dashed var(--line);text-align:center;font-size:14.5px;color:var(--text-500)}
@media(max-width:520px){
  .faq-q{font-size:15.5px;gap:10px;padding:16px 0}
  .faq-a{padding-left:0}
  .faq-item{padding:0 10px}
}

/* 自查清单 */
.check-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:640px){.check-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.check-grid{grid-template-columns:repeat(4,1fr);gap:22px}}
.check-card{
  position:relative;padding:24px 22px;border-radius:var(--r-lg);
  background:var(--ink-700);border:1px solid var(--line);
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset,var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.check-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 1px 0 rgba(255,255,255,.08) inset,0 30px 66px -30px rgba(0,0,0,.95)}
.check-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--r-md);
  background:rgba(20,227,180,.1);border:1px solid rgba(20,227,180,.25);color:var(--brand-500);
  margin-bottom:16px;
}
.check-card h3{font-size:17px;line-height:1.45;font-weight:600;color:var(--text-100);margin-bottom:8px}
.check-card p{font-size:14px;line-height:1.75;color:var(--text-500)}
.check-step{
  position:absolute;right:18px;top:18px;font-size:12.5px;letter-spacing:.08em;
  color:var(--text-700);font-variant-numeric:tabular-nums;
}

/* 支持区 */
.support-wrap{display:grid;grid-template-columns:1fr;gap:26px;align-items:stretch}
@media(min-width:1024px){.support-wrap{grid-template-columns:.95fr 1.05fr;gap:44px;align-items:center}}
.support-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--ink-600);
  aspect-ratio:16/10;
  box-shadow:var(--shadow-card);
}
.support-media img{width:100%;height:100%;object-fit:cover;transition:transform .28s var(--ease)}
.support-media:hover img{transform:scale(1.03)}
.support-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,13,18,.05) 40%,rgba(6,13,18,.72) 100%);
}
.support-media .media-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
}
.support-body h2{margin-bottom:14px}
.support-body > p{font-size:15px;line-height:1.85;color:var(--text-300);max-width:56ch}
.support-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.channel-list{display:grid;gap:12px;margin-top:22px}
.channel{
  display:flex;align-items:center;gap:14px;
  padding:14px 16px;border-radius:var(--r-md);
  background:var(--ink-700);border:1px solid var(--line);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.channel:hover{border-color:var(--line-strong);transform:translateX(3px)}
.channel svg{flex:none;color:var(--brand-500)}
.channel .ch-label{font-size:12.5px;color:var(--text-500);line-height:1.5}
.channel .ch-value{font-size:14.5px;color:var(--text-100);font-weight:600;line-height:1.5;word-break:break-all}

/* CTA 条 */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(16,34,44,.96),rgba(11,22,32,.96));
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset,var(--shadow-card);
  padding:30px 24px;
  display:grid;gap:20px;
}
.cta-band::before{
  content:"";position:absolute;left:0;top:0;height:1px;right:0;
  background:linear-gradient(90deg,rgba(20,227,180,0),rgba(20,227,180,.7),rgba(20,227,180,0));
}
@media(min-width:768px){.cta-band{grid-template-columns:1fr auto;align-items:center;padding:36px 36px;gap:28px}}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);line-height:1.35;font-weight:650;color:var(--text-100);margin-bottom:8px}
.cta-band p{font-size:14.5px;line-height:1.8;color:var(--text-500);max-width:58ch}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* 页脚 */
.site-footer{background:#050A0E;border-top:1px solid var(--line);padding:52px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);gap:36px}}
@media(min-width:1024px){.footer-grid{grid-template-columns:5fr 2fr 2fr 3fr;gap:44px}}
.f-brand .brand{margin-bottom:16px}
.f-brand p{font-size:14px;line-height:1.8;color:var(--text-500);max-width:34ch}
.f-contact{margin-top:18px;display:grid;gap:6px;font-size:13.5px;color:var(--text-500)}
.f-contact b{color:var(--text-100);font-weight:600}
.f-social{display:flex;gap:10px;margin-top:18px}
.f-social a{
  display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:var(--r-sm);border:1px solid var(--line);color:var(--text-300);
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),background .2s var(--ease);
}
.f-social a:hover{color:var(--brand-500);border-color:var(--line-strong);background:rgba(20,227,180,.07);transform:translateY(-2px)}
.f-title{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--text-100);margin-bottom:16px}
.f-links li + li{margin-top:10px}
.f-links a{
  display:inline-block;font-size:14px;color:var(--text-300);line-height:1.6;
  transition:color .2s var(--ease),text-decoration-color .2s var(--ease);
}
.f-links a:hover{color:var(--brand-500);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
.f-legal p{font-size:13px;line-height:1.8;color:var(--text-500)}
.f-legal p + p{margin-top:10px}
.f-legal .f-legal-meta{margin-top:14px;font-size:12.5px;color:var(--text-700)}
.footer-bottom{
  margin-top:42px;border-top:1px solid var(--line);
  padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--text-500);line-height:1.7;
}
.footer-bottom .dot{color:var(--text-700)}
.footer-bottom a{color:var(--text-500);transition:color .2s var(--ease)}
.footer-bottom a:hover{color:var(--brand-400)}

@media(prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category5 */
:root{
    --ink-900:#060D12;
    --ink-800:#0B1620;
    --ink-700:#10222C;
    --ink-600:#16303C;
    --brand-500:#14E3B4;
    --brand-400:#4CF0C8;
    --brand-700:#0A8E72;
    --amber-500:#FFB020;
    --text-100:#E6F1F4;
    --text-300:#C4D4DB;
    --text-500:#8FA5AE;
    --text-700:#5E747E;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(20,227,180,.35);
    --success:#35D07F;
    --warn:#FFB020;
    --error:#FF6B57;
    --radius-lg:16px;
    --radius-md:12px;
    --radius-sm:10px;
    --shadow-card:0 24px 60px -32px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
    --shadow-hover:0 32px 70px -30px rgba(0,0,0,.9), 0 0 0 1px rgba(20,227,180,.28), inset 0 1px 0 rgba(255,255,255,.08);
    --ease:cubic-bezier(.22,.61,.36,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    color:var(--text-300);
    background:var(--ink-900);
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
  button,input,select,textarea{font:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}
  .container{max-width:1200px;margin:0 auto;padding:0 24px}
  .section{padding:88px 0}
  .section-sm{padding:64px 0}
  .divider{height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.12),transparent)}

  /* ---------- 头部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(6,13,18,.72);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
    transition:background-color .24s var(--ease);
  }
  .site-header.is-scrolled{background:rgba(6,13,18,.92)}
  .nav-inner{
    max-width:1200px;margin:0 auto;padding:0 24px;
    height:72px;display:grid;grid-template-columns:1fr auto 1fr;
    align-items:center;gap:16px;position:relative;
  }
  .nav-left{display:flex;justify-content:flex-end;min-width:0}
  .nav-right{display:flex;align-items:center;justify-content:flex-start;gap:20px;min-width:0}
  .nav-list{display:flex;align-items:center;gap:24px}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;
    font-size:14.5px;color:var(--text-300);padding:8px 0;white-space:nowrap;
    transition:color .2s var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:2px;height:2px;width:0;
    background:var(--brand-500);border-radius:2px;transform:translateX(-50%);
    transition:width .22s var(--ease);
  }
  .nav-link:hover{color:var(--text-100)}
  .nav-link:hover::after{width:100%}
  .nav-link.is-active{color:var(--brand-500)}
  .nav-link.is-active::after{width:100%;opacity:.35}
  .nav-link.is-active::before{
    content:"";width:5px;height:5px;border-radius:50%;
    background:var(--brand-500);margin-right:7px;flex:none;
  }
  .brand{display:inline-flex;align-items:center;gap:9px;white-space:nowrap}
  .brand-text{font-size:17px;font-weight:600;letter-spacing:.01em;color:var(--text-100)}
  .brand:hover .brand-text{color:var(--brand-400)}
  .nav-toggle{
    display:none;position:absolute;right:16px;top:50%;transform:translateY(-50%);
    width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px;
    background:transparent;border:1px solid var(--line);border-radius:var(--radius-sm);cursor:pointer;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--text-100);border-radius:2px;transition:transform .22s var(--ease),opacity .2s var(--ease)}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav-panel{display:none;background:var(--ink-800);border-bottom:1px solid var(--line)}
  .nav-panel.is-open{display:block}
  .nav-panel .container{display:flex;flex-direction:column;padding-top:8px;padding-bottom:16px}
  .nav-panel a{
    display:flex;align-items:center;min-height:48px;font-size:15px;color:var(--text-300);
    border-bottom:1px solid var(--line);
  }
  .nav-panel a:hover{color:var(--brand-400)}
  .nav-panel a.is-active{color:var(--brand-500)}
  .nav-panel .btn{margin-top:14px;border-bottom:none;justify-content:center;min-height:44px}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 20px;border-radius:var(--radius-sm);
    font-size:14.5px;font-weight:600;letter-spacing:.01em;
    border:1px solid transparent;cursor:pointer;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
  }
  .btn:active{transform:translateY(1px)}
  .btn-sm{min-height:38px;padding:0 16px;font-size:13.5px}
  .btn-primary{
    background:var(--amber-500);color:#10171B;
    box-shadow:0 14px 34px -14px rgba(255,176,32,.65);
  }
  .btn-primary:hover{background:#FFC043;transform:translateY(-1px);box-shadow:0 18px 38px -14px rgba(255,176,32,.75)}
  .btn-brand{
    background:rgba(20,227,180,.12);color:var(--brand-400);
    border-color:rgba(20,227,180,.45);
    box-shadow:0 0 0 1px rgba(20,227,180,.2),0 14px 34px -18px rgba(20,227,180,.55);
  }
  .btn-brand:hover{background:rgba(20,227,180,.2);color:#7FF7DB;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(20,227,180,.45),0 16px 36px -16px rgba(20,227,180,.6)}
  .btn-ghost{background:transparent;border-color:var(--line);color:var(--text-100)}
  .btn-ghost:hover{border-color:var(--line-strong);color:var(--brand-400);transform:translateY(-1px)}
  .link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-size:14.5px;font-weight:600;min-height:44px}
  .link-arrow svg{transition:transform .2s var(--ease)}
  .link-arrow:hover{color:var(--brand-400)}
  .link-arrow:hover svg{transform:translateX(4px)}

  /* ---------- 徽章 ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
    font-size:11.5px;font-weight:600;letter-spacing:.02em;border-radius:999px;
    border:1px solid transparent;white-space:nowrap;
  }
  .badge-brand{color:var(--brand-400);background:rgba(20,227,180,.12);border-color:rgba(20,227,180,.45)}
  .badge-amber{color:var(--amber-500);background:rgba(255,176,32,.1);border-color:rgba(255,176,32,.4)}
  .badge-muted{color:var(--text-500);background:rgba(255,255,255,.04);border-color:var(--line)}
  .badge-success{color:var(--success);background:rgba(53,208,127,.1);border-color:rgba(53,208,127,.38)}

  /* ---------- 卡片 ---------- */
  .card{
    background:var(--ink-700);border:1px solid var(--line);
    border-radius:var(--radius-lg);box-shadow:var(--shadow-card);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  }
  .card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
  .glass{
    background:rgba(16,34,44,.55);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  }

  /* ---------- 页头横幅 ---------- */
  .page-hero{
    position:relative;overflow:hidden;
    border-bottom:1px solid var(--line);
    background-image:
      linear-gradient(180deg,rgba(6,13,18,.88),rgba(6,13,18,.96)),
      radial-gradient(60% 60% at 8% 0%,rgba(20,227,180,.16),transparent 70%),
      url('/assets/images/backpic/back-2.png');
    background-size:cover,cover,cover;
    background-position:center,center,center;
    padding:56px 0 64px;
  }
  .page-hero::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(20,227,180,.7),transparent);
  }
  .page-hero::after{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
    background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
    background-size:40px 40px;
  }
  .page-hero .container{position:relative;z-index:2}
  .crumb{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-500);flex-wrap:wrap}
  .crumb a{color:var(--text-500)}
  .crumb a:hover{color:var(--brand-400)}
  .crumb svg{opacity:.55}
  .crumb .current{color:var(--brand-500)}
  .hero-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:36px;align-items:start;margin-top:26px}
  h1{
    font-size:clamp(30px,4.6vw,50px);line-height:1.15;font-weight:700;color:var(--text-100);
    letter-spacing:-.01em;margin-top:18px;
  }
  h1 .accent{color:var(--brand-500)}
  .hero-sub{margin-top:18px;font-size:16.5px;line-height:1.85;color:var(--text-300);max-width:56ch}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
  .hero-panel{padding:24px;border-radius:var(--radius-lg);position:relative;overflow:hidden}
  .hero-panel::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(20,227,180,.8),transparent);
  }
  .panel-title{font-size:13px;color:var(--text-500);letter-spacing:.06em;text-transform:uppercase}
  .panel-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}
  .panel-row:last-of-type{border-bottom:none}
  .panel-label{font-size:13px;color:var(--text-300)}
  .panel-value{font-size:26px;font-weight:700;color:var(--text-100);font-variant-numeric:tabular-nums;letter-spacing:.02em}
  .panel-value small{font-size:12.5px;color:var(--text-500);font-weight:500;margin-left:3px}
  .panel-foot{font-size:12.5px;color:var(--text-700);margin-top:10px}
  .hero-strip{
    margin-top:44px;display:grid;grid-template-columns:repeat(4,1fr);
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  }
  .strip-item{padding:18px 20px;border-left:1px solid var(--line)}
  .strip-item:first-child{border-left:none;padding-left:0}
  .strip-label{font-size:12.5px;color:var(--text-500)}
  .strip-value{font-size:17px;font-weight:700;color:var(--text-100);margin-top:4px;font-variant-numeric:tabular-nums}

  /* ---------- 板块标题 ---------- */
  .sec-head{max-width:62ch;margin-bottom:36px}
  .sec-kicker{font-size:12.5px;letter-spacing:.14em;color:var(--brand-500);text-transform:uppercase;font-weight:600}
  h2{
    position:relative;font-size:clamp(22px,2.6vw,32px);line-height:1.3;font-weight:650;
    color:var(--text-100);margin-top:14px;padding-top:8px;
  }
  h2::before{
    content:"";position:absolute;top:-6px;left:0;width:3px;height:18px;
    background:var(--brand-500);border-radius:2px;
  }
  .sec-desc{margin-top:12px;font-size:15.5px;color:var(--text-500);line-height:1.85}
  h3{font-size:19px;line-height:1.4;font-weight:600;color:var(--text-100)}

  /* ---------- 渠道卡 ---------- */
  .channel-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:24px}
  .channel-main{grid-row:span 2;display:flex;flex-direction:column;padding:30px;overflow:hidden}
  .channel-main .thumb{
    border-radius:var(--radius-md);overflow:hidden;background:var(--ink-600);
    aspect-ratio:16/10;margin-bottom:24px;
  }
  .channel-main .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
  .channel-main:hover .thumb img{transform:scale(1.03)}
  .channel-card{padding:26px;display:flex;flex-direction:column;gap:12px}
  .channel-icon{
    width:40px;height:40px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;
    background:rgba(20,227,180,.1);border:1px solid rgba(20,227,180,.28);color:var(--brand-400);flex:none;
  }
  .channel-body{font-size:14.5px;line-height:1.8;color:var(--text-300)}
  .channel-meta{font-size:12.5px;color:var(--text-700)}
  .channel-main .channel-actions{margin-top:auto;padding-top:22px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}

  /* ---------- 服务时间条 ---------- */
  .timebar{
    display:grid;grid-template-columns:repeat(3,1fr);gap:0;
    border:1px solid var(--line);border-radius:var(--radius-lg);
    background:var(--ink-800);overflow:hidden;margin-top:28px;
  }
  .timebar-item{padding:24px 26px;border-left:1px solid var(--line)}
  .timebar-item:first-child{border-left:none}
  .timebar-item .t-label{font-size:12.5px;letter-spacing:.08em;color:var(--text-500);text-transform:uppercase}
  .timebar-item .t-value{font-size:16px;color:var(--text-100);font-weight:600;margin-top:6px;font-variant-numeric:tabular-nums}
  .timebar-item .t-desc{font-size:13.5px;color:var(--text-500);margin-top:6px;line-height:1.75}

  /* ---------- 流程 ---------- */
  .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
  .flow-item{position:relative;padding:26px 22px;background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-lg);transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease)}
  .flow-item:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
  .flow-num{font-size:32px;font-weight:700;color:rgba(20,227,180,.4);font-variant-numeric:tabular-nums;letter-spacing:.02em;line-height:1}
  .flow-item h3{font-size:17px;margin-top:14px}
  .flow-item p{font-size:14px;color:var(--text-500);margin-top:8px;line-height:1.8}

  /* ---------- 支持范围 ---------- */
  .scope-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .scope-card{padding:26px;display:flex;flex-direction:column;gap:12px}
  .scope-card .scope-top{display:flex;align-items:center;gap:12px}
  .scope-card h3{font-size:17px}
  .scope-card p{font-size:14px;color:var(--text-500);line-height:1.8}

  /* ---------- 表单 ---------- */
  .form-grid{display:grid;grid-template-columns:5fr 7fr;gap:36px;align-items:start}
  .form-side .v-item{display:flex;gap:12px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line)}
  .form-side .v-item:last-of-type{border-bottom:none}
  .form-side .v-item span{font-size:14.5px;color:var(--text-300);line-height:1.75}
  .form-side .v-icon{color:var(--brand-500);flex:none;margin-top:4px}
  .privacy-note{font-size:12.5px;color:var(--text-700);margin-top:18px;line-height:1.7}
  .support-form{padding:30px;border-radius:var(--radius-lg)}
  .field{margin-bottom:18px}
  .field label{display:block;font-size:13.5px;color:var(--text-300);margin-bottom:8px;font-weight:500}
  .field .req{color:var(--amber-500);margin-left:2px}
  .field input,.field select,.field textarea{
    width:100%;background:#0A1519;border:1px solid var(--line);border-radius:var(--radius-sm);
    color:var(--text-100);font-size:14.5px;padding:12px 14px;min-height:46px;
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
  }
  .field textarea{min-height:120px;resize:vertical;line-height:1.8}
  .field input::placeholder,.field textarea::placeholder{color:var(--text-700)}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--brand-500);
    box-shadow:0 0 0 3px rgba(20,227,180,.18);background:#0C191E;
  }
  .field select{appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238FA5AE' stroke-width='1.5'><path d='M6 9l6 6 6-6'/></svg>");background-repeat:no-repeat;background-position:right 14px center}
  .check-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text-500);line-height:1.7;margin:6px 0 20px}
  .check-row input{width:16px;height:16px;margin-top:3px;accent-color:var(--brand-500);flex:none}
  .form-submit{width:100%;min-height:48px}
  .form-alert{
    display:none;margin-top:16px;padding:12px 14px;border-radius:var(--radius-sm);
    border:1px solid rgba(20,227,180,.45);background:rgba(20,227,180,.1);
    color:var(--brand-400);font-size:13.5px;
  }
  .form-alert.is-visible{display:block}

  /* ---------- FAQ ---------- */
  .faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:start}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item summary{
    display:flex;align-items:center;gap:14px;padding:18px 0;cursor:pointer;list-style:none;
    font-size:16.5px;color:var(--text-100);font-weight:600;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-num{font-size:13px;font-weight:700;color:rgba(20,227,180,.6);font-variant-numeric:tabular-nums;flex:none}
  .faq-plus{margin-left:auto;color:var(--text-500);flex:none;transition:transform .22s var(--ease),color .2s var(--ease)}
  .faq-item[open] .faq-plus{transform:rotate(45deg);color:var(--brand-500)}
  .faq-item summary:hover{color:var(--brand-400)}
  .faq-body{
    padding:0 0 20px 30px;font-size:15px;line-height:1.85;color:var(--text-300);max-width:68ch;
  }
  .faq-item[open] .faq-body{
    background:rgba(16,34,44,.55);border-radius:var(--radius-md);
    padding:16px 18px 18px 18px;margin-bottom:14px;border:1px solid var(--line);
  }

  /* ---------- CTA 条 ---------- */
  .cta-band{
    position:relative;overflow:hidden;border-radius:var(--radius-lg);
    border:1px solid var(--line-strong);
    background:linear-gradient(120deg,rgba(20,227,180,.1),rgba(16,34,44,.9) 45%,rgba(11,22,32,.95));
    padding:40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  }
  .cta-band::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(20,227,180,.8),transparent);
  }
  .cta-band h2{font-size:clamp(20px,2.4vw,26px);margin:0;padding:0}
  .cta-band h2::before{display:none}
  .cta-band p{font-size:14.5px;color:var(--text-500);margin-top:8px}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

  /* ---------- 页脚 ---------- */
  .site-footer{background:#050A0E;border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
  .footer-grid{display:grid;grid-template-columns:5fr 2fr 2fr 3fr;gap:36px;padding-bottom:44px}
  .f-brand .brand{margin-bottom:16px}
  .f-brand p{font-size:14px;color:var(--text-500);line-height:1.8;max-width:34ch}
  .f-contact{margin-top:18px;font-size:13.5px;color:var(--text-500);line-height:2}
  .f-contact b{color:var(--text-300);font-weight:600}
  .f-social{display:flex;gap:12px;margin-top:18px}
  .f-social a{
    width:36px;height:36px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line);color:var(--text-500);
    transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  }
  .f-social a:hover{color:var(--brand-500);border-color:var(--line-strong);transform:translateY(-2px)}
  .f-title{font-size:13px;font-weight:600;color:var(--text-100);letter-spacing:.04em;margin-bottom:16px}
  .f-links li{margin-bottom:10px}
  .f-links a{font-size:14px;color:var(--text-500);border-bottom:2px solid transparent;padding-bottom:2px;transition:color .2s var(--ease),border-color .2s var(--ease)}
  .f-links a:hover{color:var(--brand-500);border-bottom-color:var(--brand-500)}
  .f-legal p{font-size:13px;color:var(--text-500);line-height:1.85;max-width:34ch}
  .f-legal .f-meta{font-size:12.5px;color:var(--text-700);margin-top:10px}
  .f-bottom{
    border-top:1px solid var(--line);padding:20px 0;display:flex;align-items:center;gap:12px;
    font-size:12.5px;color:var(--text-700);flex-wrap:wrap;
  }
  .f-bottom .dot{width:3px;height:3px;border-radius:50%;background:var(--text-700)}

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .nav-inner{height:64px;grid-template-columns:1fr auto 1fr}
    .nav-left,.nav-right{display:none}
    .nav-toggle{display:flex}
    .brand{justify-self:center}
    .section{padding:64px 0}
    .hero-grid{grid-template-columns:1fr;gap:28px}
    .hero-strip{grid-template-columns:repeat(2,1fr)}
    .strip-item:nth-child(3){border-left:none;padding-left:0}
    .strip-item{border-top:1px solid var(--line)}
    .strip-item:nth-child(1),.strip-item:nth-child(2){border-top:none}
    .channel-grid{grid-template-columns:1fr}
    .channel-main{grid-row:auto}
    .timebar{grid-template-columns:1fr}
    .timebar-item{border-left:none;border-top:1px solid var(--line)}
    .timebar-item:first-child{border-top:none}
    .flow{grid-template-columns:repeat(2,1fr)}
    .scope-grid{grid-template-columns:repeat(2,1fr)}
    .form-grid{grid-template-columns:1fr;gap:28px}
    .faq-grid{grid-template-columns:1fr;gap:28px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  }
  @media (max-width:767px){
    .container{padding:0 20px}
    .nav-inner{padding:0 20px}
    .page-hero{padding:40px 0 48px}
    .section{padding:48px 0}
    h1{font-size:clamp(26px,7vw,34px)}
    .hero-strip{grid-template-columns:1fr 1fr}
    .strip-item{padding:14px 16px}
    .flow{grid-template-columns:1fr}
    .scope-grid{grid-template-columns:1fr}
    .channel-main{padding:22px}
    .channel-card{padding:22px}
    .support-form{padding:22px}
    .cta-band{padding:28px}
    .cta-actions{width:100%}
    .cta-actions .btn{flex:1 1 auto}
    .footer-grid{grid-template-columns:1fr}
    .f-legal p,.f-brand p{max-width:none}
    .faq-item summary{font-size:15.5px}
  }
  @media (max-width:519px){
    .hero-strip{grid-template-columns:1fr}
    .strip-item{border-left:none;padding-left:0}
    .hero-actions .btn{width:100%}
  }
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
    .card:hover,.flow-item:hover,.btn:hover{transform:none}
  }