/* roulang page: index */
:root{
  --bg:#05080F;
  --panel:#0B1220;
  --panel-2:#101A2B;
  --line:rgba(122,160,214,.14);
  --line-strong:rgba(122,160,214,.28);
  --primary:#1FD8B4;
  --primary-hover:#3BEBC8;
  --primary-dark:#12A98C;
  --blue:#4E8CFF;
  --amber:#FFB65C;
  --negative:#FF6B7A;
  --text:#E8F1FF;
  --text-2:#93A4BD;
  --text-3:#6D7F99;
  --r-lg:16px;
  --r-md:14px;
  --r-sm:12px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
  --sink:0 18px -8px rgba(0,0,0,.6);
  --glow:0 0 0 1px rgba(31,216,180,.35),0 8px 26px -6px rgba(31,216,180,.32);

  --bs-body-bg:#05080F;
  --bs-body-color:#E8F1FF;
  --bs-primary:#1FD8B4;
  --bs-primary-rgb:31,216,180;
  --bs-border-color:rgba(122,160,214,.14);
  --bs-border-radius:12px;
  --bs-link-color:#1FD8B4;
  --bs-link-hover-color:#3BEBC8;
  --bs-font-sans-serif:var(--font-sans);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:68px;
  font-family:var(--font-sans);
  font-size:15px;
  line-height:1.85;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(122,160,214,.030) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.030) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color 180ms var(--ease);}
a:hover{color:var(--primary-hover);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul{list-style:none;margin:0;padding:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.sec{padding:96px 0;}
.sec-tight{padding:72px 0;}
.sec-head{margin-bottom:28px;}
.sec-title{
  display:flex;align-items:center;gap:14px;
  font-size:clamp(22px,3vw,32px);line-height:1.28;font-weight:700;
}
.sec-title::before{
  content:"";flex:0 0 auto;width:4px;height:24px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--primary-dark));
}
.sec-desc{margin-top:12px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:760px;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ---------- 按钮 ---------- */
.btn-main,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-sm);font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),filter 180ms var(--ease),background 180ms var(--ease),color 180ms var(--ease);
}
.btn-main{
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#04120E;box-shadow:var(--glow);
}
.btn-main:hover{transform:translateY(-1px);filter:brightness(1.06);color:#04120E;
  box-shadow:0 0 0 1px rgba(31,216,180,.55),0 14px 32px -8px rgba(31,216,180,.5);}
.btn-main:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;color:var(--text);border-color:var(--line-strong);
}
.btn-ghost:hover{color:var(--primary-hover);border-color:rgba(31,216,180,.55);background:rgba(31,216,180,.06);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-line{
  background:transparent;color:var(--text-2);border-color:var(--line);padding:10px 20px;font-size:14px;
}
.btn-line:hover{color:var(--text);border-color:var(--line-strong);background:var(--panel-2);}
.btn-sm{padding:10px 20px;font-size:14px;}

/* ---------- 顶栏 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  background:rgba(5,8,15,.72);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 180ms var(--ease);
}
.site-header.scrolled{box-shadow:0 8px 24px -12px #000;}
.nav-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap;}
.brand:hover{color:var(--text);}
.brand-mark{display:inline-flex;width:26px;height:26px;flex:0 0 auto;}
.brand-mark svg{width:100%;height:100%;display:block;}
.nav-links{display:flex;align-items:center;gap:2px;}
.nav-links a{
  position:relative;display:block;padding:10px 14px;font-size:15px;color:var(--text-2);border-radius:10px;
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform 180ms var(--ease);
}
.nav-links a:hover{color:var(--text);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--primary);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-actions .btn-main{padding:10px 20px;font-size:14px;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 76px;}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.14;pointer-events:none;
  -webkit-mask-image:linear-gradient(to bottom,#000,transparent 88%);
  mask-image:linear-gradient(to bottom,#000,transparent 88%);
}
.hero .wrap{position:relative;z-index:1;}
.hero-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:center;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:5px 14px;border-radius:999px;
  font-size:12px;letter-spacing:.08em;color:var(--primary);
  border:1px solid rgba(31,216,180,.32);background:rgba(31,216,180,.07);margin-bottom:20px;
}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px rgba(31,216,180,.9);}
.hero h1{font-size:clamp(30px,5vw,54px);line-height:1.14;letter-spacing:-.02em;font-weight:700;}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero-sub{margin-top:20px;font-size:clamp(15px,1.5vw,18px);line-height:1.8;color:var(--text-2);max-width:620px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  margin-top:36px;padding-top:24px;border-top:1px solid var(--line);
}
.hero-stats b{display:block;font-family:var(--font-mono);font-size:18px;font-weight:600;color:var(--text);font-variant-numeric:tabular-nums;}
.hero-stats span{display:block;font-size:12px;color:var(--text-3);margin-top:2px;}
.hero-visual{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line-strong);background:var(--panel);
  aspect-ratio:16/10;box-shadow:var(--sink);
}
.hero-visual img{width:100%;height:100%;object-fit:cover;}
.hero-visual::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(122,160,214,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.06) 1px,transparent 1px);
  background-size:32px 32px;
}
.hero-visual::before{
  content:"";position:absolute;top:0;right:0;width:64px;height:64px;z-index:2;
  border-top:1px solid var(--primary);border-right:1px solid var(--primary);
}

/* ---------- 指标看板 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric-card{
  position:relative;padding:22px;
  background:rgba(16,26,43,.62);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:var(--r-lg);
  transition:border-color 180ms var(--ease),transform 180ms var(--ease);
}
.metric-card:hover{border-color:var(--line-strong);transform:translateY(-4px);}
.metric-label{font-size:12px;color:var(--text-3);letter-spacing:.06em;}
.metric-num{
  margin-top:6px;font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3.4vw,40px);font-weight:600;line-height:1.15;color:var(--text);
}
.metric-num small{font-size:13px;font-weight:400;color:var(--text-3);margin-left:5px;font-family:var(--font-sans);}
.metric-bar{height:3px;border-radius:2px;background:rgba(122,160,214,.16);margin-top:16px;overflow:hidden;}
.metric-bar i{display:block;height:100%;border-radius:2px;background:linear-gradient(90deg,var(--primary-dark),var(--primary));}
.delta{
  position:absolute;top:16px;right:16px;
  font-family:var(--font-mono);font-size:11px;line-height:1.6;padding:1px 9px;border-radius:999px;
}
.delta.up{color:var(--primary);background:rgba(31,216,180,.12);border:1px solid rgba(31,216,180,.3);}
.delta.warn{color:var(--amber);background:rgba(255,182,92,.1);border:1px solid rgba(255,182,92,.3);}

.trend-row{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:24px;}
.trend-card{
  padding:22px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--panel);transition:border-color 180ms var(--ease);
}
.trend-card:hover{border-color:var(--line-strong);}
.trend-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;}
.trend-head strong{font-size:15px;font-weight:600;}
.trend-head span{font-family:var(--font-mono);font-size:12px;color:var(--text-3);}
.bars{display:flex;align-items:flex-end;gap:8px;height:66px;margin-top:18px;}
.bars i{flex:1;border-radius:3px 3px 0 0;background:rgba(31,216,180,.6);transition:background 180ms var(--ease);}
.bars i:nth-child(even){background:rgba(78,140,255,.42);}
.trend-card:hover .bars i{background:rgba(31,216,180,.85);}
.trend-card:hover .bars i:nth-child(even){background:rgba(78,140,255,.62);}
.bars-legend{display:flex;justify-content:space-between;margin-top:10px;font-family:var(--font-mono);font-size:11px;color:var(--text-3);}

/* ---------- 服务矩阵 ---------- */
.matrix{display:grid;grid-template-columns:1fr 1fr;gap:0 36px;border-top:1px solid var(--line);}
.matrix-item{
  display:flex;gap:18px;align-items:flex-start;
  padding:26px 16px 26px 16px;border-bottom:1px solid var(--line);
  color:inherit;border-radius:0;
  transition:background 180ms var(--ease),transform 180ms var(--ease),box-shadow 180ms var(--ease),color 180ms var(--ease);
}
.matrix-item:hover{background:var(--panel-2);transform:translateX(6px);color:inherit;}
.matrix-item .no{
  flex:0 0 auto;font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;
  color:var(--primary);padding-top:3px;
}
.matrix-item h3{font-size:17px;font-weight:600;line-height:1.5;}
.matrix-item p{margin-top:4px;font-size:14px;line-height:1.7;color:var(--text-2);}
.matrix-item .arrow{margin-left:auto;color:var(--text-3);align-self:center;font-size:14px;transition:color 180ms var(--ease),transform 180ms var(--ease);}
.matrix-item:hover .arrow{color:var(--primary);transform:translateX(3px);}
.matrix-item.featured{
  background:var(--panel-2);border:1px solid rgba(31,216,180,.32);
  border-radius:var(--r-lg);padding:30px 22px;margin-top:0;
  box-shadow:0 0 0 1px rgba(31,216,180,.10);
}
.matrix-item.featured h3{font-size:19px;}

/* ---------- 对比 ---------- */
.compare-panel{
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--panel);
  padding:28px 26px;position:relative;overflow:hidden;
}
.compare-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(122,160,214,.05) 0 1px,transparent 1px 96px);
}
.compare-lead{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:24px;}
.compare-lead p{font-size:15px;color:var(--text-2);}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;padding:3px 12px;border-radius:999px;
  color:var(--primary);background:rgba(31,216,180,.1);border:1px solid rgba(31,216,180,.28);
}
.chip.blue{color:#9FBDFF;background:rgba(78,140,255,.1);border-color:rgba(78,140,255,.3);}
.compare-row{
  position:relative;display:grid;grid-template-columns:170px 1fr;gap:20px;align-items:center;
  padding:16px 0;border-bottom:1px dashed rgba(122,160,214,.16);
}
.compare-row:last-child{border-bottom:0;}
.compare-row .row-label{font-size:14px;color:var(--text-2);}
.cbar{display:flex;align-items:center;gap:12px;margin-bottom:8px;}
.cbar:last-child{margin-bottom:0;}
.cbar .track{flex:1;height:10px;border-radius:5px;background:rgba(122,160,214,.10);overflow:hidden;}
.cbar i{display:block;height:100%;border-radius:5px;transition:width 600ms var(--ease);}
.cbar.before i{background:rgba(109,127,153,.42);}
.cbar.after i{background:linear-gradient(90deg,var(--primary-dark),var(--primary));}
.cbar b{
  flex:0 0 62px;text-align:right;font-family:var(--font-mono);font-size:13px;
  font-weight:500;color:var(--text-2);font-variant-numeric:tabular-nums;
}
.cbar.after b{color:var(--primary);}

/* ---------- 最新信息 ---------- */
.list-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;}
.list-head .more{
  font-size:14px;color:var(--primary);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
}
.list-head .more:hover{color:var(--primary-hover);}
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.info-card{
  display:flex;flex-direction:column;height:100%;
  padding:20px;border-radius:var(--r-lg);
  background:var(--panel);border:1px solid var(--line);color:inherit;
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.info-card:hover{
  transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sink);color:inherit;
}
.info-thumb{
  border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:16/9;background:var(--panel-2);margin-bottom:16px;
}
.info-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease);}
.info-card:hover .info-thumb img{transform:scale(1.03);}
.info-tag{
  display:inline-block;align-self:flex-start;margin-bottom:10px;
  font-size:12px;letter-spacing:.06em;padding:2px 10px;border-radius:999px;
  color:#9FBDFF;background:rgba(78,140,255,.08);border:1px solid rgba(78,140,255,.32);
}
.info-card h3{
  font-size:17px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.info-card .excerpt{
  margin-top:8px;font-size:14px;line-height:1.7;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.info-foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-family:var(--font-mono);font-size:12px;color:var(--text-3);
}
.info-foot .go{color:var(--text-3);transition:color 180ms var(--ease),transform 180ms var(--ease);}
.info-card:hover .info-foot .go{color:var(--primary);transform:translateX(3px);}
.empty-state{
  grid-column:1/-1;padding:52px 24px;text-align:center;
  border:1px dashed var(--line-strong);border-radius:var(--r-lg);background:var(--panel);
  color:var(--text-2);
}
.empty-state svg{width:38px;height:38px;stroke:var(--text-3);fill:none;stroke-width:1.4;margin:0 auto 14px;}
.empty-state p{margin-bottom:18px;font-size:15px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:920px;}
.faq .accordion-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-sm);
  margin-bottom:12px;overflow:hidden;
  transition:background 180ms var(--ease),border-color 180ms var(--ease);
}
.faq .accordion-item:hover{border-color:var(--line-strong);}
.faq .accordion-header{margin:0;}
.faq .accordion-button{
  display:flex;align-items:center;gap:14px;
  padding:19px 56px 19px 22px;font-size:16px;font-weight:600;color:var(--text);
  background:transparent;box-shadow:none;border:0;border-radius:0;
  transition:background 180ms var(--ease),color 180ms var(--ease);
}
.faq .accordion-button:not(.collapsed){
  color:var(--primary-hover);background:var(--panel-2);
  box-shadow:inset 3px 0 0 var(--primary);
}
.faq .accordion-button:focus{box-shadow:none;}
.faq .accordion-button::after{
  content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
  width:26px;height:26px;margin:0;background-image:none;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:18px;line-height:1;
  color:var(--text-2);border:1px solid var(--line-strong);border-radius:50%;
  transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{
  content:"−";color:var(--primary);border-color:rgba(31,216,180,.5);background:rgba(31,216,180,.1);
}
.faq .faq-no{
  font-family:var(--font-mono);font-size:13px;color:var(--text-3);letter-spacing:.08em;flex:0 0 auto;
}
.faq .accordion-button:not(.collapsed) .faq-no{color:var(--primary);}
.faq .accordion-body{padding:0 22px 22px 58px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- 表单 ---------- */
.form-panel{
  display:grid;grid-template-columns:1.25fr .85fr;gap:40px;
  padding:34px;border-radius:var(--r-lg);
  background:rgba(16,26,43,.62);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--line-strong);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px;}
.field .form-control,.field .form-select{
  width:100%;padding:11px 14px;font-size:15px;line-height:1.5;
  color:var(--text);background:var(--panel);
  border:1px solid var(--line);border-radius:var(--r-sm);
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease);
}
.field .form-control::placeholder{color:var(--text-3);}
.field .form-control:focus,.field .form-select:focus{
  color:var(--text);background:var(--panel);
  border-color:var(--primary);box-shadow:0 0 0 3px rgba(31,216,180,.18);outline:none;
}
.field .form-select option{background:var(--panel);color:var(--text);}
.check-row{display:flex;align-items:flex-start;gap:10px;margin:4px 0 22px;}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--primary);flex:0 0 auto;}
.check-row span{font-size:13px;line-height:1.7;color:var(--text-2);}
.form-actions{display:flex;justify-content:flex-end;}
.form-actions .btn-main{min-width:168px;}
.form-msg{
  margin-top:18px;padding:11px 16px;border-radius:var(--r-sm);font-size:14px;
  color:var(--primary);background:rgba(31,216,180,.08);border:1px solid rgba(31,216,180,.3);
}
.form-side{border-left:1px solid var(--line);padding-left:34px;display:flex;flex-direction:column;gap:20px;}
.side-item{display:flex;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--line);}
.side-item:last-child{border-bottom:0;padding-bottom:0;}
.side-item i{color:var(--primary);font-size:15px;line-height:1.9;}
.side-item strong{display:block;font-size:14px;font-weight:600;color:var(--text);}
.side-item span{font-size:13px;color:var(--text-2);line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,18,32,.55),rgba(5,8,15,1));
  padding-top:64px;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:48px 48px;
}
.site-footer .wrap{position:relative;z-index:1;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:13px;line-height:1.85;color:var(--text-2);max-width:320px;}
.footer-icons{display:flex;gap:12px;margin-top:18px;}
.footer-icons a{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;border:1px solid var(--line);color:var(--text-2);
  transition:all 180ms var(--ease);
}
.footer-icons a:hover{color:var(--primary);border-color:rgba(31,216,180,.45);background:rgba(31,216,180,.07);transform:translateY(-2px);}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;letter-spacing:.02em;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:13px;color:var(--text-2);}
.footer-col a:hover{color:var(--text);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}
.footer-bottom .mono{font-size:12px;}

/* ---------- 移动底 Tab ---------- */
.tabbar{display:none;}
@media (max-width:991.98px){
  .tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:1040;
    height:62px;padding-bottom:env(safe-area-inset-bottom);
    background:rgba(8,13,24,.94);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-top:1px solid var(--line);
  }
  .tabbar a{
    position:relative;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:3px;font-size:11px;line-height:1.2;color:var(--text-3);
    transition:color 180ms var(--ease);
  }
  .tabbar a svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:transform 180ms var(--ease);}
  .tabbar a.active{color:var(--primary);}
  .tabbar a.active svg{transform:translateY(-2px);}
  .tabbar a.active::before{
    content:"";position:absolute;top:0;left:20%;right:20%;height:2px;border-radius:0 0 2px 2px;
    background:var(--primary);box-shadow:0 0 10px rgba(31,216,180,.8);
  }
  body{padding-bottom:76px;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .hero-grid{grid-template-columns:1.2fr 1fr;gap:36px;}
  .info-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  .sec{padding:64px 0;}
  .sec-tight{padding:56px 0;}
  .nav-links{display:none;}
  .nav-inner{height:60px;}
  body{padding-top:60px;}
  .hero{padding:44px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-visual{order:2;max-width:560px;}
  .hero-stats{grid-template-columns:repeat(4,1fr);}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .trend-row{grid-template-columns:1fr;}
  .matrix{grid-template-columns:1fr;gap:0;}
  .matrix-item:hover{transform:none;}
  .matrix-item.featured{margin:14px 0;padding:24px 18px;}
  .form-panel{grid-template-columns:1fr;gap:28px;padding:26px;}
  .form-side{border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767.98px){
  .compare-row{grid-template-columns:1fr;gap:10px;}
  .compare-row .row-label{font-size:13px;}
  .faq .accordion-body{padding-left:22px;}
}
@media (max-width:575.98px){
  .wrap{padding:0 18px;}
  .sec{padding:56px 0;}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:14px;}
  .metrics{grid-template-columns:1fr 1fr;gap:14px;}
  .metric-card{padding:18px;}
  .info-grid{grid-template-columns:1fr;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .hero-cta .btn-main,.hero-cta .btn-ghost{width:100%;}
  .form-actions .btn-main{width:100%;}
  .form-side{padding-top:20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .list-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .faq .accordion-button{font-size:15px;padding:17px 52px 17px 18px;}
  .compare-panel{padding:20px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}

/* roulang page: article */
:root{
  --bg:#05080F;
  --panel:#0B1220;
  --panel-2:#101A2B;
  --line:rgba(122,160,214,.14);
  --line-strong:rgba(122,160,214,.28);
  --brand:#1FD8B4;
  --brand-hover:#3BEBC8;
  --brand-deep:#12A98C;
  --blue:#4E8CFF;
  --amber:#FFB65C;
  --neg:#FF6B7A;
  --text:#E8F1FF;
  --text-2:#93A4BD;
  --text-3:#6D7F99;
  --radius:16px;
  --radius-sm:12px;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,monospace;
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --shadow-sink:0 18px -8px rgba(0,0,0,.6);
  --shadow-glow:0 0 0 1px rgba(31,216,180,.35),0 8px 26px -6px rgba(31,216,180,.32);

  --bs-body-bg:#05080F;
  --bs-body-color:#E8F1FF;
  --bs-primary:#1FD8B4;
  --bs-primary-rgb:31,216,180;
  --bs-border-radius:12px;
  --bs-border-color:rgba(122,160,214,.14);
  --bs-link-color:#1FD8B4;
  --bs-link-hover-color:#3BEBC8;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:15px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  padding-bottom:0;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(122,160,214,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(122,160,214,.035) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.9;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease)}
a:hover{color:var(--brand-hover)}
h1,h2,h3,h4,h5{margin:0;color:var(--text);font-weight:650;line-height:1.28;letter-spacing:-.01em}
p{margin:0 0 16px}
ul,ol{margin:0 0 16px;padding-left:1.25em}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;position:relative;z-index:1}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.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}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,15,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px -12px #000;background:rgba(5,8,15,.9)}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text);letter-spacing:.01em;flex:0 0 auto}
.brand:hover{color:var(--text)}
.brand-mark{display:inline-flex;width:26px;height:26px;flex:0 0 auto}
.brand-mark svg{width:100%;height:100%;display:block}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:8px;flex:1 1 auto}
.nav-links a{
  position:relative;
  padding:9px 13px;
  font-size:15px;
  color:var(--text-2);
  border-radius:10px;
  transition:color var(--ease),background var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left center;
  transition:transform var(--ease);
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:600;color:#04140F;
  background:linear-gradient(135deg,var(--brand-hover),var(--brand) 55%,var(--brand-deep));
  box-shadow:var(--shadow-glow);
  border:1px solid rgba(31,216,180,.6);
  transition:transform var(--ease),filter var(--ease),box-shadow var(--ease);
  white-space:nowrap;
}
.btn-main:hover{color:#04140F;filter:brightness(1.07);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,216,180,.5),0 12px 30px -8px rgba(31,216,180,.45)}
.btn-main:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:600;color:var(--text);
  background:transparent;border:1px solid var(--line-strong);
  transition:border-color var(--ease),color var(--ease),background var(--ease),transform var(--ease);
  white-space:nowrap;
}
.btn-ghost:hover{color:var(--brand);border-color:rgba(31,216,180,.55);background:rgba(31,216,180,.06);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}

/* ---------- breadcrumb ---------- */
.crumb{padding:26px 0 0}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;margin:0;padding:0;font-size:13px;color:var(--text-2)}
.crumb li{display:inline-flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:var(--text-3)}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--brand)}
.crumb [aria-current="page"]{color:var(--text-3)}

/* ---------- article head ---------- */
.article-head{padding:22px 0 0;max-width:840px}
.badge-cat{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:999px;
  font-size:12px;letter-spacing:.08em;color:var(--blue);
  background:transparent;border:1px solid rgba(78,140,255,.45);
}
.badge-cat i{font-size:11px}
.article-title{
  font-size:clamp(26px,3.6vw,38px);
  line-height:1.32;
  font-weight:700;
  letter-spacing:-.02em;
  margin:18px 0 18px;
  color:var(--text);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  font-size:13px;color:var(--text-3);
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);display:inline-block}
.article-meta .mono{color:var(--text-2)}

/* ---------- article body ---------- */
.article-main{padding:0 0 96px}
.article-shell{max-width:800px;margin:0 auto}
.article-body{padding:34px 0 8px;font-size:16px;line-height:1.95;color:#D6E2F5}
.article-body>*:first-child{margin-top:0}
.article-body h2{
  position:relative;
  font-size:clamp(21px,2.6vw,28px);
  line-height:1.4;font-weight:650;
  margin:40px 0 16px;padding-left:16px;
  color:var(--text);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;width:3px;height:18px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:18px;font-weight:650;margin:30px 0 12px;color:var(--text)}
.article-body p{margin:0 0 18px;color:#C8D6EA}
.article-body a{color:var(--brand);border-bottom:1px dashed rgba(31,216,180,.6)}
.article-body a:hover{color:var(--brand-hover);border-bottom-color:var(--brand-hover)}
.article-body strong{color:#fff;font-weight:650}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:0;list-style:none}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;margin-bottom:10px;color:#C8D6EA}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:5px;height:5px;border-radius:1px;background:var(--brand);
}
.article-body ol{counter-reset:li}
.article-body ol li{counter-increment:li}
.article-body ol li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-family:var(--mono);font-size:13px;color:var(--brand);
}
.article-body blockquote{
  margin:24px 0;padding:20px 24px;
  border-left:3px solid var(--brand);
  background:rgba(16,26,43,.55);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;border:1px solid var(--line);margin:22px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-3);margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;font-size:14px;margin:22px 0}
.article-body .table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-sm);margin:22px 0}
.article-body table th{
  text-align:left;padding:12px;color:var(--text);font-weight:650;
  border-top:2px solid var(--brand);border-bottom:1px solid var(--line-strong);
  white-space:nowrap;background:rgba(16,26,43,.6);
}
.article-body table td{padding:12px;border-bottom:1px solid var(--line);color:#C8D6EA}
.article-body table tr:nth-child(even) td{background:rgba(16,26,43,.35)}
.article-body pre{
  background:#070C16;border:1px solid var(--line);border-radius:12px;
  padding:18px;overflow-x:auto;font-family:var(--mono);font-size:13px;line-height:1.7;color:#B9CBDF;
}
.article-body code{font-family:var(--mono);font-size:.92em;background:rgba(31,216,180,.1);color:var(--brand-hover);padding:2px 6px;border-radius:6px}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:34px 0}

/* ---------- empty state ---------- */
.empty-state{
  margin:40px 0 0;padding:56px 28px;text-align:center;
  border:1px dashed var(--line-strong);border-radius:var(--radius);
  background:rgba(11,18,32,.6);
}
.empty-state i{font-size:30px;color:var(--text-3);margin-bottom:14px;display:block}
.empty-state h2{font-size:20px;margin-bottom:8px}
.empty-state p{color:var(--text-2);margin-bottom:22px}

/* ---------- continue / related ---------- */
.section-gap{padding-top:8px}
.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
}
.next-links{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:32px}
.next-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--panel);color:var(--text);font-size:14px;font-weight:600;
  transition:border-color var(--ease),transform var(--ease),background var(--ease),color var(--ease);
}
.next-links a:hover{border-color:rgba(31,216,180,.5);transform:translateY(-3px);background:var(--panel-2);color:var(--brand)}
.next-links i{color:var(--brand);font-size:13px}

.related{padding:0 0 96px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.sec-head h2{
  position:relative;padding-left:16px;
  font-size:clamp(22px,3vw,30px);
}
.sec-head h2::before{content:"";position:absolute;left:0;top:.24em;width:3px;height:22px;border-radius:2px;background:var(--brand)}
.sec-head p{margin:8px 0 0;color:var(--text-2);font-size:14px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rcard{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.rcard:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 18px 34px -22px #000}
.rcard .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line)}
.rcard .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.2,.7,.3,1)}
.rcard:hover .thumb img{transform:scale(1.03)}
.rcard-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1 1 auto}
.rcard-body h3{font-size:17px;line-height:1.5;font-weight:650}
.rcard-body p{font-size:13px;line-height:1.75;color:var(--text-2);margin:0}
.rcard-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:auto;padding-top:14px;font-size:12px;color:var(--text-3);
}
.rcard-foot i{color:var(--brand);font-size:12px}

/* ---------- cta band ---------- */
.cta-band{
  border:1px solid var(--line-strong);border-radius:var(--radius);
  background:linear-gradient(120deg,rgba(16,26,43,.95),rgba(11,18,32,.95));
  padding:30px 32px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  margin-bottom:96px;
}
.cta-band h2{font-size:clamp(19px,2.4vw,24px);margin-bottom:6px}
.cta-band p{margin:0;font-size:14px;color:var(--text-2)}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background-image:linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:56px 56px;
  padding:56px 0 0;
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
.footer-brand p{margin:14px 0 18px;font-size:13px;line-height:1.85;color:var(--text-2);max-width:300px}
.footer-icons{display:flex;gap:10px}
.footer-icons a{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  border:1px solid var(--line);color:var(--text-2);font-size:13px;
  transition:color var(--ease),border-color var(--ease),transform var(--ease);
}
.footer-icons a:hover{color:var(--brand);border-color:rgba(31,216,180,.5);transform:translateY(-2px)}
.footer-col h4{font-size:14px;font-weight:650;margin-bottom:14px;color:var(--text)}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footer-col a{font-size:13px;color:var(--text-2)}
.footer-col a:hover{color:var(--text)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  border-top:1px solid var(--line);padding:18px 0 22px;
  font-size:13px;color:var(--text-3);
}

/* ---------- mobile tabs ---------- */
.mobile-tabs{display:none}
@media (max-width:991px){
  .mobile-tabs{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;
    height:62px;padding-bottom:env(safe-area-inset-bottom);
    background:rgba(5,8,15,.92);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-top:1px solid var(--line);
  }
  .mobile-tabs a{
    flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:11px;color:var(--text-3);position:relative;
    transition:color var(--ease),transform var(--ease);
  }
  .mobile-tabs a i{font-size:17px;transition:transform var(--ease)}
  .mobile-tabs a::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%) scaleX(0);
    width:26px;height:2px;border-radius:2px;background:var(--brand);
    box-shadow:0 0 10px rgba(31,216,180,.8);
    transition:transform var(--ease);
  }
  .mobile-tabs a.active{color:var(--brand)}
  .mobile-tabs a.active::before{transform:translateX(-50%) scaleX(1)}
  .mobile-tabs a.active i{transform:translateY(-2px)}
  body{padding-bottom:76px}
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .related-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:991px){
  .wrap{padding:0 24px}
  .nav-links{display:none}
  .nav-inner{height:56px;gap:14px}
  .nav-actions{margin-left:auto}
  .btn-main{padding:8px 16px;font-size:13px}
  .article-head,.article-shell{max-width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-brand{grid-column:1 / -1}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .next-links{grid-template-columns:1fr}
  .article-main{padding-bottom:64px}
  .related{padding-bottom:64px}
  .cta-band{margin-bottom:64px}
}
@media (max-width:575px){
  .wrap{padding:0 18px}
  body{font-size:14.5px}
  .crumb{padding-top:18px}
  .article-title{margin:14px 0 14px}
  .article-body{font-size:15.5px;line-height:1.95;padding-top:26px}
  .article-body h2{margin-top:34px}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .cta-band{padding:24px 20px;gap:18px}
  .cta-actions{width:100%}
  .cta-actions .btn-main,.cta-actions .btn-ghost{flex:1 1 100%;justify-content:center}
  .sec-head{flex-direction:column;align-items:flex-start;gap:8px}
  .empty-state{padding:40px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --bg:#05080F;
  --panel:#0B1220;
  --panel-2:#101A2B;
  --line:rgba(122,160,214,.14);
  --line-strong:rgba(122,160,214,.28);
  --brand:#1FD8B4;
  --brand-hover:#3BEBC8;
  --brand-deep:#12A98C;
  --blue:#4E8CFF;
  --amber:#FFB65C;
  --neg:#FF6B7A;
  --text:#E8F1FF;
  --muted:#93A4BD;
  --dim:#6D7F99;
  --r-card:16px;
  --r-img:14px;
  --r-btn:12px;
  --sink:0 18px 30px -18px rgba(0,0,0,.75);
  --glow:0 0 0 1px rgba(31,216,180,.35),0 8px 26px -6px rgba(31,216,180,.32);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --bs-primary:#1FD8B4;
  --bs-body-bg:#05080F;
  --bs-body-color:#E8F1FF;
  --bs-border-radius:12px;
  --bs-link-color:#1FD8B4;
  --bs-link-hover-color:#3BEBC8;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:15px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand);text-decoration:none;transition:color 180ms var(--ease);}
a:hover{color:var(--brand-hover);}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.3;color:var(--text);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,15,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px -12px rgba(0,0,0,.9);}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px;}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--text);
  white-space:nowrap;
}
.brand:hover{color:var(--text);}
.brand-mark{display:inline-flex;width:26px;height:26px;}
.brand-mark svg{width:100%;height:100%;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-links a{
  position:relative;
  padding:8px 12px;
  font-size:15px;color:var(--muted);
  border-radius:8px;
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform 200ms var(--ease);
}
.nav-links a:hover{color:var(--text);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;font-size:14px;font-weight:600;
  color:#04120F;
  background:linear-gradient(180deg,var(--brand-hover),var(--brand-deep));
  border:1px solid rgba(31,216,180,.6);
  border-radius:var(--r-btn);
  box-shadow:var(--glow);
  transition:transform 180ms var(--ease),filter 180ms var(--ease),box-shadow 180ms var(--ease);
}
.btn-main:hover{color:#04120F;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,216,180,.45),0 10px 30px -6px rgba(31,216,180,.42);}
.btn-main:active{transform:translateY(0);filter:brightness(.98);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;font-size:14px;font-weight:600;
  color:var(--text);
  background:transparent;
  border:1px solid var(--line-strong);
  border-radius:var(--r-btn);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease),color 180ms var(--ease);
}
.btn-ghost:hover{color:var(--brand);border-color:rgba(31,216,180,.55);background:rgba(31,216,180,.06);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}

/* ============ Breadcrumb ============ */
.crumb{
  padding:26px 0 0;
  font-size:13px;color:var(--muted);
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--dim);}
.crumb .cur{color:var(--dim);}

/* ============ Mini Hero ============ */
.mini-hero{padding:22px 0 0;}
.mini-hero-box{
  position:relative;
  display:grid;grid-template-columns:1fr 420px;gap:40px;align-items:center;
  min-height:340px;
  padding:36px 38px;
  background:
    radial-gradient(600px 240px at 12% -10%,rgba(31,216,180,.10),transparent 70%),
    linear-gradient(180deg,var(--panel-2),var(--panel));
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
}
.mini-hero-box::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(122,160,214,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.045) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(120deg,#000 20%,transparent 78%);
  -webkit-mask-image:linear-gradient(120deg,#000 20%,transparent 78%);
}
.mini-hero-copy{position:relative;z-index:1;}
.tag-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;font-size:12px;letter-spacing:.08em;
  color:var(--brand);
  background:rgba(31,216,180,.08);
  border:1px solid rgba(31,216,180,.32);
  border-radius:999px;
}
.mini-hero h1{
  margin:16px 0 0;
  font-size:clamp(26px,3.6vw,38px);
  line-height:1.24;letter-spacing:-.02em;
}
.mini-hero h1 em{color:var(--brand);font-style:normal;}
.mini-hero p.lead{
  margin-top:14px;max-width:560px;
  font-size:15.5px;line-height:1.85;color:var(--muted);
}
.mini-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:26px;margin-top:26px;}
.hero-facts div{display:flex;flex-direction:column;}
.hero-facts b{font-family:var(--mono);font-size:18px;color:var(--text);font-weight:600;}
.hero-facts span{font-size:12px;color:var(--dim);letter-spacing:.04em;}
.mini-hero-media{position:relative;z-index:1;}
.mini-hero-media .frame{
  position:relative;
  border:1px solid var(--line-strong);
  border-radius:var(--r-img);
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--panel);
  box-shadow:var(--sink);
}
.mini-hero-media img{width:100%;height:100%;object-fit:cover;opacity:.9;}
.mini-hero-media .frame::before{
  content:"";position:absolute;top:0;right:0;width:32px;height:32px;z-index:2;
  border-top:1px solid var(--brand);border-right:1px solid var(--brand);
}
.mini-hero-media .frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(5,8,15,.35) 1px,transparent 1px),
    linear-gradient(90deg,rgba(5,8,15,.35) 1px,transparent 1px);
  background-size:26px 26px;
}

/* ============ Section base ============ */
.section{padding:88px 0 0;}
.sec-head{max-width:760px;}
.sec-head h2{
  position:relative;
  padding-left:16px;
  font-size:clamp(22px,3vw,32px);
  line-height:1.28;font-weight:650;
}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;
  background:var(--brand);border-radius:2px;
}
.sec-head p{margin-top:12px;font-size:15px;color:var(--muted);}

/* ============ Steps timeline ============ */
.steps{margin-top:36px;display:flex;flex-direction:column;}
.step{
  position:relative;
  display:grid;grid-template-columns:66px 1fr;gap:22px;
  padding:0 0 30px;
}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:31px;top:56px;bottom:0;width:2px;
  background:linear-gradient(180deg,rgba(31,216,180,.55),rgba(31,216,180,.06));
}
.step:last-child::before{display:none;}
.step-num{
  position:relative;z-index:1;
  width:64px;height:64px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:18px;font-weight:600;
  color:var(--brand);
  background:var(--panel);
  border:1px solid rgba(31,216,180,.32);
  border-radius:14px;
  box-shadow:inset 0 0 0 1px rgba(31,216,180,.08);
}
.step-body{
  padding:20px 24px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease);
}
.step-body:hover{transform:translateX(6px);border-color:var(--line-strong);background:var(--panel-2);}
.step-body h3{font-size:18px;font-weight:600;}
.step-body p{margin-top:8px;font-size:15px;color:var(--muted);}
.step-points{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;font-size:12px;
  color:var(--muted);
  background:rgba(78,140,255,.07);
  border:1px solid rgba(78,140,255,.26);
  border-radius:999px;
}
.chip i{font-size:10px;color:var(--blue);}

/* ============ Info cards ============ */
.info-grid{
  margin-top:36px;
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;
}
.info-card{
  display:flex;gap:20px;
  padding:22px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.info-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sink);}
.info-card .thumb{
  flex:0 0 112px;width:112px;height:112px;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--panel-2);
}
.info-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease);}
.info-card:hover .thumb img{transform:scale(1.05);}
.info-card .txt{min-width:0;}
.info-card .idx{
  font-family:var(--mono);font-size:12px;color:var(--brand);letter-spacing:.1em;
}
.info-card h3{margin-top:6px;font-size:18px;font-weight:600;}
.info-card p{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ============ Notice ============ */
.notice{
  margin-top:32px;
  display:flex;gap:14px;align-items:flex-start;
  padding:18px 22px;
  background:rgba(255,182,92,.06);
  border:1px solid rgba(255,182,92,.32);
  border-left:3px solid var(--amber);
  border-radius:12px;
}
.notice i{color:var(--amber);font-size:16px;margin-top:4px;}
.notice p{font-size:14.5px;color:#E9D7BD;}
.notice b{color:var(--amber);}

/* ============ FAQ ============ */
.faq-list{margin-top:32px;display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
  transition:background 200ms var(--ease),border-color 200ms var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-q{
  width:100%;
  display:flex;align-items:center;gap:16px;
  padding:18px 22px;
  background:transparent;border:0;
  color:var(--text);
  font-size:16px;font-weight:600;text-align:left;
  cursor:pointer;
  transition:color 180ms var(--ease);
}
.faq-q:hover{color:var(--brand-hover);}
.faq-q .qnum{
  font-family:var(--mono);font-size:12px;color:var(--dim);letter-spacing:.08em;
}
.faq-q .qi{
  margin-left:auto;flex:0 0 24px;
  width:24px;height:24px;line-height:22px;text-align:center;
  border:1px solid var(--line-strong);border-radius:50%;
  color:var(--muted);font-size:12px;
  transition:transform 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease);
}
.faq-q[aria-expanded="true"]{
  color:var(--brand);
  background:var(--panel-2);
  box-shadow:inset 3px 0 0 0 var(--brand);
}
.faq-q[aria-expanded="true"] .qi{color:var(--brand);border-color:rgba(31,216,180,.5);transform:rotate(180deg);}
.faq-a{padding:0 22px 20px 60px;font-size:15px;line-height:1.85;color:var(--muted);}
.faq-a b{color:var(--text);font-weight:600;}

/* ============ CTA bar ============ */
.cta-bar{
  margin-top:80px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:32px 36px;
  background:
    radial-gradient(500px 200px at 88% 0%,rgba(31,216,180,.12),transparent 70%),
    linear-gradient(180deg,var(--panel-2),var(--panel));
  border:1px solid var(--line-strong);
  border-radius:var(--r-card);
}
.cta-bar h2{font-size:clamp(20px,2.4vw,26px);font-weight:650;}
.cta-bar p{margin-top:8px;font-size:14.5px;color:var(--muted);max-width:560px;}
.cta-bar .acts{display:flex;flex-wrap:wrap;gap:12px;}
.cta-bar .acts .btn-main{padding:12px 26px;}

/* ============ Footer ============ */
.site-footer{
  position:relative;z-index:1;
  margin-top:96px;
  padding-top:64px;
  border-top:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(16,26,43,.35),rgba(5,8,15,0));
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:64px 64px;
}
.site-footer .wrap{position:relative;z-index:1;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:44px;
}
.footer-brand p{
  margin-top:14px;font-size:13.5px;line-height:1.85;color:var(--muted);max-width:300px;
}
.footer-icons{display:flex;gap:10px;margin-top:18px;}
.footer-icons a{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--muted);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:10px;font-size:14px;
  transition:color 180ms var(--ease),border-color 180ms var(--ease),transform 180ms var(--ease);
}
.footer-icons a:hover{color:var(--brand);border-color:rgba(31,216,180,.45);transform:translateY(-2px);}
.footer-col h4{font-size:14px;font-weight:600;letter-spacing:.02em;color:var(--text);}
.footer-col ul{margin-top:14px;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--muted);}
.footer-col a:hover{color:var(--text);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--dim);
}

/* ============ Mobile tab bar ============ */
.mobile-tab{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  height:62px;
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(5,8,15,.88);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--line);
}
.mobile-tab ul{display:flex;height:62px;}
.mobile-tab li{flex:1;min-width:0;}
.mobile-tab a{
  position:relative;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:62px;
  font-size:11px;color:var(--dim);
  transition:color 180ms var(--ease);
}
.mobile-tab a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:transform 180ms var(--ease);}
.mobile-tab a.active{color:var(--brand);}
.mobile-tab a.active svg{transform:translateY(-2px);}
.mobile-tab a.active::before{
  content:"";position:absolute;top:0;left:26%;right:26%;height:2px;
  background:var(--brand);border-radius:2px;
  box-shadow:0 0 10px rgba(31,216,180,.8);
}

/* ============ Responsive ============ */
@media (max-width:1199.98px){
  .mini-hero-box{grid-template-columns:1fr 360px;gap:32px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;}
}
@media (max-width:991.98px){
  .wrap{padding:0 24px;}
  .nav-links{display:none;}
  .nav-inner{height:60px;}
  .mini-hero-box{grid-template-columns:1fr;min-height:auto;padding:30px 26px;}
  .mini-hero-media{order:2;}
  .mini-hero-media .frame{aspect-ratio:16/9;}
  .section{padding:64px 0 0;}
  .info-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-bar{padding:28px 26px;}
}
@media (max-width:767.98px){
  body{padding-bottom:76px;font-size:15px;}
  .mobile-tab{display:block;}
  .nav-actions .btn-main{padding:8px 14px;font-size:13px;}
  .mini-hero h1{font-size:26px;}
  .mini-hero p.lead{font-size:14.5px;}
  .hero-facts{gap:20px;}
  .step{grid-template-columns:52px 1fr;gap:14px;}
  .step::before{left:25px;top:48px;}
  .step-num{width:52px;height:52px;font-size:15px;border-radius:12px;}
  .step-body{padding:16px 18px;}
  .info-card{flex-direction:column;gap:14px;}
  .info-card .thumb{width:100%;flex:none;height:150px;}
  .faq-a{padding:0 18px 18px 18px;}
  .faq-q{padding:16px 18px;gap:10px;font-size:15px;}
  .cta-bar .acts{width:100%;}
  .cta-bar .acts a{flex:1;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-bottom{font-size:12px;}
}
@media (max-width:519.98px){
  .wrap{padding:0 18px;}
  .brand{font-size:15.5px;}
  .brand-mark{width:23px;height:23px;}
  .mini-hero-box{padding:24px 18px;}
  .mini-hero-actions a{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-bar{padding:22px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  a:hover,.step-body:hover,.info-card:hover{transform:none;}
}

/* roulang page: category2 */
:root{
  --bg:#05080F;
  --panel:#0B1220;
  --panel-2:#101A2B;
  --line:rgba(122,160,214,.14);
  --line-strong:rgba(122,160,214,.28);
  --primary:#1FD8B4;
  --primary-h:#3BEBC8;
  --primary-d:#12A98C;
  --accent:#4E8CFF;
  --warn:#FFB65C;
  --neg:#FF6B7A;
  --text:#E8F1FF;
  --muted:#93A4BD;
  --dim:#6D7F99;
  --r-lg:16px;
  --r-md:14px;
  --r-sm:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --sink:0 18px -8px rgba(0,0,0,.6);
  --glow:0 0 0 1px rgba(31,216,180,.35),0 8px 26px -6px rgba(31,216,180,.32);
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --bs-primary:#1FD8B4;
  --bs-body-bg:#05080F;
  --bs-body-color:#E8F1FF;
  --bs-link-color:#1FD8B4;
  --bs-link-hover-color:#3BEBC8;
  --bs-border-radius:12px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:56px 56px;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color 180ms var(--ease);}
a:hover{color:var(--primary-h);}
p{margin:0 0 14px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.01em;color:var(--text);}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em;}

.wrap{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  height:68px;
  display:flex;
  align-items:center;
  background:rgba(5,8,15,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease),background 220ms var(--ease);
}
.site-header.scrolled{
  box-shadow:0 8px 24px -12px rgba(0,0,0,.9);
  background:rgba(5,8,15,.9);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:100%;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  font-size:17px;
  font-weight:700;
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--text);}
.brand-mark{display:inline-flex;width:28px;height:28px;flex:0 0 28px;}
.brand-mark svg{width:100%;height:100%;display:block;}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  justify-content:center;
}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  color:var(--muted);
  border-radius:10px;
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:2px;
  height:2px;
  background:var(--primary);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 180ms var(--ease);
}
.nav-links a:hover{color:var(--text);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--primary);}
.nav-links a.active::after{transform:scaleX(1);opacity:.85;}
.nav-actions{display:flex;align-items:center;gap:12px;}
.btn-main{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:40px;
  padding:0 20px;
  background:linear-gradient(180deg,var(--primary-h),var(--primary));
  color:#04120E;
  font-size:14px;
  font-weight:700;
  border-radius:var(--r-sm);
  border:1px solid rgba(31,216,180,.55);
  box-shadow:var(--glow);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),filter 180ms var(--ease);
}
.btn-main:hover{
  color:#04120E;
  filter:brightness(1.06);
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(31,216,180,.5),0 10px 30px -6px rgba(31,216,180,.45);
}
.btn-main:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:40px;
  padding:0 20px;
  background:transparent;
  color:var(--text);
  font-size:14px;
  font-weight:600;
  border-radius:var(--r-sm);
  border:1px solid var(--line-strong);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease);
}
.btn-ghost:hover{
  color:var(--text);
  border-color:rgba(31,216,180,.5);
  background:rgba(16,26,43,.7);
  transform:translateY(-1px);
}
.btn-ghost:active{transform:translateY(0);}

/* ---------- breadcrumb ---------- */
.crumb{
  padding:26px 0 0;
  font-size:13px;
  color:var(--muted);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:var(--dim);}
.crumb .now{color:var(--dim);}

/* ---------- hero ---------- */
.hero{
  padding:34px 0 0;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.32fr 1fr;
  gap:44px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--primary);
  border:1px solid rgba(31,216,180,.3);
  background:rgba(31,216,180,.07);
  border-radius:999px;
  padding:5px 14px;
  margin-bottom:20px;
}
.eyebrow i{font-size:11px;}
.hero h1{
  font-size:clamp(26px,3.7vw,40px);
  line-height:1.24;
  font-weight:700;
  letter-spacing:-.02em;
  margin-bottom:16px;
}
.hero h1 .hl{color:var(--primary);}
.hero-sub{
  font-size:16px;
  line-height:1.9;
  color:var(--muted);
  max-width:640px;
  margin-bottom:24px;
}
.hero-cta{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:26px;
}
.hero-cta .btn-main,.hero-cta .btn-ghost{height:46px;padding:0 26px;font-size:15px;}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-stats .num{
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:20px;
  color:var(--text);
  font-weight:600;
  display:block;
  line-height:1.2;
}
.hero-stats .lbl{
  font-size:12px;
  color:var(--dim);
  display:block;
  margin-top:4px;
}
.hero-visual{
  position:relative;
  border-radius:var(--r-md);
  border:1px solid var(--line-strong);
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--panel);
  box-shadow:var(--sink);
}
.hero-visual img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.86;
}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(31,216,180,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(31,216,180,.05) 1px,transparent 1px);
  background-size:34px 34px;
  pointer-events:none;
}
.hero-visual .corner{
  position:absolute;
  top:0;
  right:0;
  width:34px;
  height:34px;
  border-left:1px solid var(--primary);
  border-bottom:1px solid var(--primary);
  z-index:2;
}
.hero-visual .tagline{
  position:absolute;
  left:16px;
  bottom:16px;
  z-index:2;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--text);
  background:rgba(5,8,15,.72);
  border:1px solid var(--line-strong);
  border-radius:999px;
  padding:6px 14px;
  font-family:var(--mono);
}

/* ---------- sections ---------- */
.section{padding:88px 0 0;}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:28px;
}
.section-head h2{
  position:relative;
  font-size:clamp(22px,2.8vw,30px);
  line-height:1.3;
  padding-left:14px;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  bottom:6px;
  width:3px;
  border-radius:2px;
  background:var(--primary);
}
.section-desc{
  font-size:14px;
  color:var(--muted);
  max-width:640px;
  margin-top:10px;
  padding-left:14px;
}
.section-link{
  font-size:14px;
  color:var(--muted);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.section-link:hover{color:var(--primary);}

/* ---------- checklist grid ---------- */
.check-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
}
.check-card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px 24px 22px;
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.check-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:var(--sink);
}
.check-card .idx{
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  color:var(--primary);
  letter-spacing:.1em;
  display:block;
  margin-bottom:12px;
}
.check-card h3{
  font-size:18px;
  font-weight:650;
  margin-bottom:10px;
  display:flex;
  align-items:center;
  gap:10px;
}
.check-card h3 i{
  font-size:15px;
  color:var(--accent);
}
.check-card p{
  font-size:14.5px;
  line-height:1.85;
  color:var(--muted);
  margin:0;
}
.check-card .bar{
  position:absolute;
  left:24px;
  right:24px;
  bottom:14px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,rgba(31,216,180,.5),rgba(31,216,180,0));
  opacity:0;
  transition:opacity 180ms var(--ease);
}
.check-card:hover .bar{opacity:1;}

/* ---------- alert bar ---------- */
.alert-bar{
  margin-top:24px;
  display:flex;
  gap:16px;
  align-items:flex-start;
  background:rgba(255,182,92,.07);
  border:1px solid rgba(255,182,92,.34);
  border-left:3px solid var(--warn);
  border-radius:var(--r-md);
  padding:18px 22px;
}
.alert-bar i{
  color:var(--warn);
  font-size:17px;
  line-height:1.6;
  flex:0 0 auto;
}
.alert-bar strong{
  color:var(--warn);
  font-weight:650;
  display:block;
  margin-bottom:4px;
  font-size:15px;
}
.alert-bar p{
  margin:0;
  font-size:14px;
  color:var(--muted);
  line-height:1.8;
}

/* ---------- compare table ---------- */
.table-shell{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
table.cmp{
  width:100%;
  min-width:720px;
  border-collapse:collapse;
  font-size:14.5px;
}
table.cmp thead th{
  text-align:left;
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--primary);
  font-weight:650;
  padding:16px 20px;
  background:rgba(16,26,43,.85);
  border-bottom:2px solid rgba(31,216,180,.45);
  white-space:nowrap;
}
table.cmp tbody td{
  padding:15px 20px;
  border-bottom:1px solid var(--line);
  color:var(--muted);
  vertical-align:top;
  line-height:1.7;
}
table.cmp tbody tr:nth-child(even){background:rgba(16,26,43,.45);}
table.cmp tbody tr:last-child td{border-bottom:none;}
table.cmp tbody tr:hover{background:rgba(16,26,43,.8);}
table.cmp td.item{color:var(--text);font-weight:600;white-space:nowrap;}
table.cmp td.before{color:var(--dim);}
table.cmp td.after{color:var(--primary);font-weight:600;}
table.cmp td .mono{font-family:var(--mono);font-size:12.5px;}

/* ---------- steps rows ---------- */
.order-list{
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--panel);
  overflow:hidden;
}
.order-row{
  display:flex;
  align-items:center;
  gap:20px;
  padding:20px 24px;
  border-bottom:1px solid var(--line);
  transition:background 180ms var(--ease),transform 180ms var(--ease);
}
.order-row:last-child{border-bottom:none;}
.order-row:hover{
  background:var(--panel-2);
  transform:translateX(6px);
}
.order-row .oidx{
  font-family:var(--mono);
  font-size:13px;
  color:var(--primary);
  letter-spacing:.1em;
  flex:0 0 42px;
}
.order-row .otxt{flex:1 1 auto;min-width:0;}
.order-row .otxt h3{
  font-size:16.5px;
  font-weight:600;
  margin-bottom:4px;
}
.order-row .otxt p{
  margin:0;
  font-size:14px;
  color:var(--muted);
  line-height:1.75;
}
.order-row .oarrow{
  color:var(--dim);
  font-size:14px;
  transition:color 180ms var(--ease),transform 180ms var(--ease);
}
.order-row:hover .oarrow{color:var(--primary);transform:translateX(4px);}

/* ---------- cover card ---------- */
.cover-card{
  display:grid;
  grid-template-columns:1fr 1.15fr;
  gap:0;
  border:1px solid var(--line-strong);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--panel);
}
.cover-card .pic{
  position:relative;
  min-height:260px;
  overflow:hidden;
}
.cover-card .pic img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 320ms var(--ease);
}
.cover-card:hover .pic img{transform:scale(1.04);}
.cover-card .body{
  padding:30px 32px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.cover-card .body h3{
  font-size:20px;
  margin-bottom:12px;
}
.cover-card .body p{
  font-size:14.5px;
  color:var(--muted);
  line-height:1.85;
  margin-bottom:18px;
}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
  border:1px solid var(--line-strong);
  border-radius:999px;
  padding:4px 12px;
  background:rgba(16,26,43,.6);
}
.chip.on{
  color:var(--primary);
  border-color:rgba(31,216,180,.4);
  background:rgba(31,216,180,.08);
}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  position:relative;
  overflow:hidden;
  transition:background 200ms var(--ease),border-color 200ms var(--ease);
}
.faq-item::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:3px;
  background:var(--primary);
  transform:scaleY(0);
  transform-origin:top center;
  transition:transform 200ms var(--ease);
}
.faq-item.open{
  background:var(--panel-2);
  border-color:var(--line-strong);
}
.faq-item.open::before{transform:scaleY(1);}
.faq-btn{
  width:100%;
  display:flex;
  align-items:center;
  gap:14px;
  padding:20px 22px;
  background:none;
  border:none;
  text-align:left;
  color:var(--text);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
}
.faq-btn .fidx{
  font-family:var(--mono);
  font-size:13px;
  color:var(--dim);
  flex:0 0 auto;
}
.faq-btn .ftext{flex:1 1 auto;}
.faq-btn .fplus{
  flex:0 0 auto;
  width:26px;
  height:26px;
  border-radius:50%;
  border:1px solid var(--line-strong);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  font-size:11px;
  transition:color 200ms var(--ease),border-color 200ms var(--ease),transform 200ms var(--ease);
}
.faq-item.open .fplus{color:var(--primary);border-color:rgba(31,216,180,.5);}
.faq-panel{
  max-height:0;
  overflow:hidden;
  transition:max-height 240ms var(--ease);
}
.faq-panel .inner{
  padding:0 22px 22px 58px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
@media (max-width:575px){
  .faq-panel .inner{padding-left:22px;}
}

/* ---------- CTA band ---------- */
.cta-band{
  margin-top:88px;
  border:1px solid rgba(31,216,180,.28);
  border-radius:var(--r-lg);
  background:
    radial-gradient(120% 160% at 0% 0%,rgba(31,216,180,.12),transparent 55%),
    var(--panel);
  padding:34px 36px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:22px;
}
.cta-band .txt h2{
  font-size:clamp(19px,2.3vw,24px);
  margin-bottom:8px;
}
.cta-band .txt p{
  margin:0;
  font-size:14px;
  color:var(--muted);
  max-width:620px;
}
.cta-band .act{display:flex;flex-wrap:wrap;gap:12px;}
.cta-band .btn-main,.cta-band .btn-ghost{height:46px;padding:0 26px;font-size:15px;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  background-image:
    linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:56px 56px;
  padding:56px 0 26px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
}
.footer-brand p{
  font-size:13.5px;
  color:var(--muted);
  line-height:1.85;
  margin:16px 0 18px;
  max-width:320px;
}
.footer-icons{display:flex;gap:10px;}
.footer-icons a{
  width:36px;
  height:36px;
  border-radius:10px;
  border:1px solid var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  font-size:14px;
  transition:color 180ms var(--ease),border-color 180ms var(--ease),transform 180ms var(--ease);
}
.footer-icons a:hover{
  color:var(--primary);
  border-color:rgba(31,216,180,.45);
  transform:translateY(-2px);
}
.footer-col h4{
  font-size:14px;
  font-weight:650;
  color:var(--text);
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  font-size:13.5px;
  color:var(--muted);
}
.footer-col a:hover{color:var(--text);}
.footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--dim);
}
.footer-bottom .mono{font-size:12.5px;}

/* ---------- mobile tab ---------- */
.m-tab{
  display:none;
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:1100;
  height:62px;
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(5,8,15,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-top:1px solid var(--line-strong);
}
.m-tab a{
  flex:1 1 0;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  position:relative;
  color:var(--dim);
  font-size:11px;
  line-height:1.2;
  transition:color 180ms var(--ease);
}
.m-tab a svg{
  width:22px;
  height:22px;
  stroke:currentColor;
  stroke-width:1.6;
  fill:none;
  stroke-linecap:round;
  stroke-linejoin:round;
  transition:transform 180ms var(--ease);
}
.m-tab a.active{color:var(--primary);}
.m-tab a.active svg{transform:translateY(-2px);}
.m-tab a.active::before{
  content:"";
  position:absolute;
  top:0;
  left:50%;
  transform:translateX(-50%);
  width:28px;
  height:2px;
  border-radius:0 0 2px 2px;
  background:var(--primary);
  box-shadow:0 0 10px rgba(31,216,180,.8);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero-grid{gap:32px;}
}
@media (max-width:991px){
  .wrap{padding:0 24px;}
  .site-header{height:56px;}
  .nav-links{display:none;}
  .nav-actions .btn-main{height:36px;padding:0 16px;font-size:13.5px;}
  .m-tab{display:flex;}
  body{padding-bottom:76px;}
  .hero{padding-top:26px;}
  .hero-grid{grid-template-columns:1fr;gap:28px;}
  .hero-visual{order:-1;aspect-ratio:16/9;}
  .hero-stats{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;}
  .check-grid{grid-template-columns:1fr;}
  .cover-card{grid-template-columns:1fr;}
  .cover-card .pic{min-height:200px;}
  .section{padding-top:64px;}
  .cta-band{margin-top:64px;padding:26px 24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
  .site-footer{margin-top:72px;padding-top:44px;}
}
@media (max-width:575px){
  .wrap{padding:0 18px;}
  body{font-size:15.5px;}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .hero-cta .btn-main,.hero-cta .btn-ghost{width:100%;}
  .hero-visual{aspect-ratio:4/3;}
  .check-card{padding:20px 18px;}
  .order-row{padding:16px 18px;gap:14px;flex-wrap:wrap;}
  .order-row .oarrow{display:none;}
  .faq-btn{padding:16px 16px;font-size:15px;gap:10px;}
  .cta-band .act{width:100%;flex-direction:column;}
  .cta-band .btn-main,.cta-band .btn-ghost{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .alert-bar{padding:16px 16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category3 */
:root{
  --bg:#05080F;
  --panel:#0B1220;
  --panel-2:#101A2B;
  --line:rgba(122,160,214,.14);
  --line-strong:rgba(122,160,214,.28);
  --main:#1FD8B4;
  --main-h:#3BEBC8;
  --main-d:#12A98C;
  --blue:#4E8CFF;
  --amber:#FFB65C;
  --neg:#FF6B7A;
  --text:#E8F1FF;
  --muted:#93A4BD;
  --muted-3:#6D7F99;
  --r-card:16px;
  --r-img:14px;
  --r-btn:12px;
  --shadow-sink:0 18px -8px rgba(0,0,0,.6);
  --glow:0 0 0 1px rgba(31,216,180,.35),0 8px 26px -6px rgba(31,216,180,.32);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --bs-primary:#1FD8B4;
  --bs-body-bg:#05080F;
  --bs-body-color:#E8F1FF;
  --bs-border-radius:16px;
  --bs-link-color:#1FD8B4;
  --bs-link-hover-color:#3BEBC8;
  --bs-font-sans-serif:var(--font-sans);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  padding-bottom:calc(76px + env(safe-area-inset-bottom));
  background-image:
    linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:48px 48px,48px 48px;
}
img{max-width:100%;display:block}
a{color:var(--main);text-decoration:none;transition:color 180ms var(--ease)}
a:hover{color:var(--main-h)}
h1,h2,h3,h4,h5{margin:0;color:var(--text);font-weight:650;line-height:1.28}
p{margin:0 0 14px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--main);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.section{padding:96px 0}
.section-sm{padding:64px 0}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-head h2{
  font-size:clamp(22px,3vw,32px);
  position:relative;
  padding-left:18px;
  margin-bottom:12px;
}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:.32em;width:4px;height:1.05em;
  background:var(--main);border-radius:2px;
}
.sec-head p{color:var(--muted);font-size:15px;margin:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;color:var(--main);
  text-transform:uppercase;font-family:var(--font-mono);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--main);opacity:.7}

/* ===== Header / Nav ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(5,8,15,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 200ms var(--ease),background 200ms var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px -12px rgba(0,0,0,.9);background:rgba(5,8,15,.9)}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--text);font-weight:700;font-size:17px;letter-spacing:.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--text)}
.brand-mark{width:26px;height:26px;display:inline-flex;flex:0 0 26px}
.brand-mark svg{width:100%;height:100%}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{
  position:relative;display:inline-block;
  padding:10px 12px;font-size:15px;color:var(--muted);
  border-radius:10px;transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--main);border-radius:2px;transform:scaleX(0);
  transform-origin:left center;transition:transform 180ms var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(122,160,214,.06)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--main)}
.nav-links a.active::after{transform:scaleX(1);opacity:.85}
.nav-actions{margin-left:8px}
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:14px;font-weight:600;cursor:pointer;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.btn-main{
  background:linear-gradient(180deg,var(--main-h),var(--main));
  color:#04140F;border:1px solid rgba(31,216,180,.55);box-shadow:var(--glow);
}
.btn-main:hover{color:#04140F;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,216,180,.5),0 12px 30px -8px rgba(31,216,180,.44)}
.btn-main:active{transform:translateY(0)}
.btn-ghost{
  background:transparent;color:var(--text);border:1px solid var(--line-strong);
}
.btn-ghost:hover{color:var(--main);border-color:rgba(31,216,180,.55);transform:translateY(-1px);background:rgba(31,216,180,.06)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{min-height:38px;padding:0 16px;font-size:13px}

/* ===== Hero ===== */
.page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 64px;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(900px 320px at 12% -10%,rgba(31,216,180,.10),transparent 70%);
}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted-3);margin-bottom:22px;
}
.crumb a{color:var(--muted-3)}
.crumb a:hover{color:var(--main)}
.crumb .sep{color:rgba(122,160,214,.35)}
.crumb .cur{color:var(--muted-3)}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;z-index:1}
h1.page-title{
  font-size:clamp(26px,3.6vw,38px);
  line-height:1.24;letter-spacing:-.01em;margin-bottom:18px;
}
.hero-lead{color:var(--muted);font-size:16px;line-height:1.85;max-width:560px;margin-bottom:26px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}
.mini-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:560px}
.mini-stats li{
  border:1px solid var(--line);border-radius:12px;background:var(--panel);
  padding:12px 14px;
}
.mini-stats b{
  display:block;font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:18px;color:var(--main);line-height:1.3;
}
.mini-stats span{font-size:12px;color:var(--muted-3);display:block;margin-top:4px}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--line-strong);
  box-shadow:var(--shadow-sink);
}
.hero-media .corner{
  position:absolute;top:-1px;right:-1px;width:56px;height:56px;
  border-top:1px solid var(--main);border-right:1px solid var(--main);
  border-top-right-radius:var(--r-img);opacity:.8;
}
.hero-media .cap{
  position:absolute;left:14px;bottom:14px;
  font-family:var(--font-mono);font-size:12px;color:var(--text);
  background:rgba(5,8,15,.72);border:1px solid var(--line-strong);
  border-radius:999px;padding:5px 12px;backdrop-filter:blur(6px);
}

/* ===== Chips ===== */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(16,26,43,.55);
  color:var(--muted);font-size:13px;letter-spacing:.02em;
  cursor:pointer;transition:all 180ms var(--ease);
}
.chip:hover{color:var(--text);border-color:rgba(31,216,180,.4);transform:translateY(-1px)}
.chip.is-on{
  color:#04140F;background:linear-gradient(180deg,var(--main-h),var(--main));
  border-color:rgba(31,216,180,.6);font-weight:600;
  box-shadow:0 6px 18px -8px rgba(31,216,180,.5);
}
.chip .num{font-family:var(--font-mono);font-size:12px;opacity:.7}

/* ===== Version timeline ===== */
.tl-head,.tl-row{
  display:grid;grid-template-columns:180px 1fr 220px;gap:28px;
  align-items:start;
}
.tl-head{
  padding:0 22px 14px;font-size:12px;letter-spacing:.12em;
  color:var(--muted-3);font-family:var(--font-mono);text-transform:uppercase;
  border-bottom:1px solid var(--line);
}
.tl-row{
  padding:24px 22px;border-bottom:1px solid var(--line);
  transition:background 180ms var(--ease),transform 180ms var(--ease),border-color 180ms var(--ease);
}
.tl-list{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:rgba(11,18,32,.5)}
.tl-row:hover{background:var(--panel-2);transform:translateX(6px);border-color:var(--line-strong)}
.tl-ver{display:flex;flex-direction:column;gap:6px}
.tl-ver b{font-family:var(--font-mono);font-size:17px;color:var(--main);font-variant-numeric:tabular-nums}
.tl-ver time{font-family:var(--font-mono);font-size:12px;color:var(--muted-3)}
.tl-body h3{font-size:16px;margin-bottom:6px;font-weight:600}
.tl-body p{font-size:14px;color:var(--muted);margin:0 0 10px}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
  font-size:12px;letter-spacing:.04em;
  border:1px solid rgba(78,140,255,.35);color:#9CBDFF;background:rgba(78,140,255,.08);
}
.tag.green{border-color:rgba(31,216,180,.35);color:var(--main);background:rgba(31,216,180,.08)}
.tag.amber{border-color:rgba(255,182,92,.35);color:var(--amber);background:rgba(255,182,92,.08)}
.tl-scope{display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.tl-scope span{font-size:13px;color:var(--muted)}
.bar{width:100%;height:6px;border-radius:999px;background:rgba(122,160,214,.14);overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:rgba(31,216,180,.6)}
.bar.amber i{background:rgba(255,182,92,.6)}
.bar.blue i{background:rgba(78,140,255,.55)}

/* ===== Cards ===== */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;transition:transform 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-sink)}
.card .idx{
  font-family:var(--font-mono);font-size:12px;color:var(--main);
  letter-spacing:.14em;display:block;margin-bottom:14px;
}
.card h3{font-size:18px;margin-bottom:10px}
.card p{font-size:14px;color:var(--muted);margin:0}
.card .foot{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted-3);display:flex;justify-content:space-between;gap:10px;font-family:var(--font-mono)}

/* ===== Steps + compare ===== */
.step-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;position:relative;margin-bottom:36px}
.step{
  position:relative;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px 24px 24px;
}
.step::before{
  content:"";position:absolute;left:0;top:22px;width:3px;height:26px;
  background:var(--main);border-radius:0 3px 3px 0;
}
.step b{
  display:block;font-family:var(--font-mono);font-size:12px;
  color:var(--muted-3);letter-spacing:.16em;margin-bottom:10px;
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted);margin:0}
.compare{
  background:rgba(16,26,43,.62);border:1px solid var(--line-strong);
  border-radius:var(--r-card);padding:26px;backdrop-filter:blur(10px);
}
.compare-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px}
.compare-head h3{font-size:18px}
.compare-head .badges{display:flex;gap:8px;flex-wrap:wrap}
.cmp-row{display:grid;grid-template-columns:160px 1fr;gap:18px;align-items:center;padding:12px 0;border-top:1px solid var(--line)}
.cmp-row:first-of-type{border-top:0}
.cmp-label{font-size:14px;color:var(--muted)}
.cmp-bars{display:flex;flex-direction:column;gap:6px}
.cmp-bar{display:flex;align-items:center;gap:10px}
.cmp-bar i{display:block;height:8px;border-radius:999px}
.cmp-bar i.before{background:rgba(109,127,153,.4)}
.cmp-bar i.after{background:var(--main)}
.cmp-bar em{font-style:normal;font-family:var(--font-mono);font-size:12px;color:var(--muted-3);white-space:nowrap}

/* ===== FAQ ===== */
.faq .accordion-item{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;transition:border-color 180ms var(--ease),background 180ms var(--ease);
}
.faq .accordion-item:has(.accordion-button:not(.collapsed)){background:var(--panel-2);border-color:rgba(31,216,180,.35);box-shadow:inset 3px 0 0 var(--main)}
.faq .accordion-button{
  background:transparent;color:var(--text);font-size:16px;font-weight:600;
  padding:18px 20px 18px 54px;box-shadow:none;gap:12px;line-height:1.6;
}
.faq .accordion-button:not(.collapsed){color:var(--main)}
.faq .accordion-button::after{
  content:"+";margin-left:auto;width:26px;height:26px;flex:0 0 26px;
  border:1px solid var(--line-strong);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:15px;color:var(--muted);
  background-image:none;transform:none;transition:all 180ms var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{
  content:"−";color:var(--main);border-color:rgba(31,216,180,.5);
  transform:none;
}
.faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--main);outline-offset:-2px}
.faq .accordion-body{padding:0 20px 20px 54px;color:var(--muted);font-size:15px;line-height:1.85}
.faq-num{
  position:absolute;left:20px;top:19px;
  font-family:var(--font-mono);font-size:12px;color:var(--main);letter-spacing:.1em;
}
.faq .accordion-button{position:relative}

/* ===== CTA ===== */
.cta-band{
  border:1px solid var(--line-strong);border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(16,26,43,.95),rgba(11,18,32,.85));
  padding:40px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border:1px solid rgba(31,216,180,.18);border-radius:50%;
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);margin-bottom:8px}
.cta-band p{color:var(--muted);font-size:15px;margin:0;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}

/* ===== Footer ===== */
.site-footer{
  border-top:1px solid var(--line);margin-top:20px;
  background-image:linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:48px 48px,48px 48px;
  padding:56px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
.footer-brand p{color:var(--muted);font-size:13px;line-height:1.85;margin:16px 0 18px;max-width:280px}
.footer-icons{display:flex;gap:10px}
.footer-icons a{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--muted);
  transition:all 180ms var(--ease);
}
.footer-icons a:hover{color:var(--main);border-color:rgba(31,216,180,.45);background:rgba(31,216,180,.06);transform:translateY(-2px)}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:14px;font-weight:600}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--muted);font-size:13px}
.footer-col a:hover{color:var(--text)}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--muted-3);
}

/* ===== Mobile tab bar ===== */
.mobile-tabs{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;
  height:calc(62px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(5,8,15,.9);backdrop-filter:blur(14px);
  border-top:1px solid var(--line-strong);
  grid-template-columns:repeat(5,1fr);
}
.mobile-tabs a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--muted-3);font-size:11px;position:relative;
  transition:color 180ms var(--ease),transform 180ms var(--ease);
}
.mobile-tabs a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6}
.mobile-tabs a.active{color:var(--main)}
.mobile-tabs a.active svg{transform:translateY(-2px)}
.mobile-tabs a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;background:var(--main);border-radius:0 0 2px 2px;
  box-shadow:0 0 8px rgba(31,216,180,.8);
}

/* ===== Responsive ===== */
@media (max-width:1199px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .tl-head,.tl-row{grid-template-columns:150px 1fr 180px;gap:22px}
}
@media (max-width:991px){
  .wrap{padding:0 24px}
  .nav-links{display:none}
  .nav-actions{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .mini-stats{grid-template-columns:repeat(2,1fr);max-width:none}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .step-flow{grid-template-columns:1fr}
  .tl-head{display:none}
  .tl-row{grid-template-columns:1fr;gap:14px;padding:22px 20px}
  .tl-scope{flex-direction:row;align-items:center;justify-content:space-between;width:100%}
  .tl-scope .bar{max-width:60%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:64px 0}
  .mobile-tabs{display:grid}
}
@media (max-width:575px){
  .wrap{padding:0 18px}
  .nav-inner{height:56px;gap:12px}
  .brand{font-size:15px}
  .brand-mark{width:22px;height:22px;flex:0 0 22px}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .mini-stats{grid-template-columns:repeat(2,1fr);gap:10px}
  .hero-cta .btn-main,.hero-cta .btn-ghost{width:100%}
  .cmp-row{grid-template-columns:1fr;gap:8px}
  .cta-band{padding:26px}
  .cta-actions{width:100%}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .faq .accordion-button{padding-left:48px;font-size:15px}
  .faq .accordion-body{padding-left:48px}
  .section{padding:56px 0}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: category4 */
:root{
  --bg:#05080F;
  --panel:#0B1220;
  --panel-2:#101A2B;
  --line:rgba(122,160,214,.14);
  --line-strong:rgba(122,160,214,.28);
  --primary:#1FD8B4;
  --primary-h:#3BEBC8;
  --primary-d:#12A98C;
  --blue:#4E8CFF;
  --amber:#FFB65C;
  --neg:#FF6B7A;
  --text:#E8F1FF;
  --text-2:#93A4BD;
  --text-3:#6D7F99;
  --r-card:16px;
  --r-img:14px;
  --r-btn:12px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --bs-primary:#1FD8B4;
  --bs-body-bg:#05080F;
  --bs-body-color:#E8F1FF;
  --bs-border-radius:12px;
  --bs-link-color:#1FD8B4;
  --bs-link-hover-color:#3BEBC8;
  --bs-font-sans-serif:var(--font);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:56px 56px;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--primary-h)}
p{margin:0 0 14px}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:650;letter-spacing:-.01em}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;position:relative;z-index:1}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(5,8,15,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.scrolled{box-shadow:0 8px 24px -12px #000;background:rgba(5,8,15,.9)}
.nav-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--text);font-weight:700;font-size:17px;letter-spacing:.01em;
  text-decoration:none;flex:0 0 auto;
}
.brand:hover{color:var(--text)}
.brand-mark{display:inline-flex;width:26px;height:26px}
.brand-mark svg{width:26px;height:26px;display:block}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{
  position:relative;font-size:15px;color:var(--text-2);text-decoration:none;
  padding:22px 0;transition:color var(--t);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform var(--t);border-radius:2px;
}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--text)}
.nav-links a:hover::after,.nav-links a:focus-visible::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:linear-gradient(180deg,var(--primary-h),var(--primary));
  color:#04120E;font-weight:700;font-size:15px;line-height:1;
  padding:12px 20px;border-radius:var(--r-btn);border:1px solid rgba(31,216,180,.5);
  text-decoration:none;cursor:pointer;
  box-shadow:0 0 0 1px rgba(31,216,180,.35),0 8px 26px -6px rgba(31,216,180,.32);
  transition:transform var(--t),filter var(--t),box-shadow var(--t);
}
.btn-main:hover{color:#04120E;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,216,180,.45),0 12px 30px -6px rgba(31,216,180,.45)}
.btn-main:active{transform:translateY(0);filter:brightness(.98)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--text);font-weight:600;font-size:15px;line-height:1;
  padding:12px 20px;border-radius:var(--r-btn);border:1px solid var(--line-strong);
  text-decoration:none;cursor:pointer;transition:border-color var(--t),color var(--t),background var(--t),transform var(--t);
}
.btn-ghost:hover{color:var(--primary);border-color:rgba(31,216,180,.6);background:rgba(31,216,180,.06);transform:translateY(-1px)}

/* ---------- hero ---------- */
.hero{position:relative;padding:52px 0 56px;border-bottom:1px solid var(--line);overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.16;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.25));
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.25));
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-2);margin-bottom:18px}
.crumbs a{color:var(--text-2);text-decoration:none}
.crumbs a:hover{color:var(--primary)}
.crumbs span.sep{color:var(--text-3)}
.crumbs span.now{color:var(--text-3)}
.tag-pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.06em;color:var(--primary);
  padding:6px 12px;border-radius:999px;border:1px solid rgba(31,216,180,.35);
  background:rgba(31,216,180,.07);margin-bottom:16px;
}
.hero h1{
  font-size:clamp(28px,3.9vw,40px);line-height:1.2;font-weight:700;letter-spacing:-.02em;
  margin-bottom:16px;
}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-sub{font-size:16px;color:var(--text-2);max-width:600px;margin-bottom:22px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px}

.search-box{
  display:flex;align-items:center;gap:10px;
  background:rgba(16,26,43,.62);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border:1px solid var(--line-strong);
  border-radius:14px;
  padding:8px 8px 8px 16px;
  max-width:600px;
  box-shadow:0 18px -8px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.03);
}
.search-box i{color:var(--primary);font-size:15px}
.search-box input{
  flex:1 1 auto;min-width:0;background:transparent;border:0;outline:none;
  color:var(--text);font-size:15px;padding:10px 0;
}
.search-box input::placeholder{color:var(--text-3)}
.search-box .btn-main{padding:10px 18px;font-size:14px;white-space:nowrap}
.search-note{margin-top:10px;font-size:13px;color:var(--text-3)}
.hero-alert{
  margin-top:14px;display:none;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--text);background:rgba(31,216,180,.08);
  border:1px solid rgba(31,216,180,.32);border-radius:12px;padding:12px 14px;
}
.hero-alert.show{display:flex}
.hero-figure{position:relative}
.hero-figure img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--line-strong);
  background:var(--panel);
}
.hero-figure::after{
  content:"";position:absolute;top:-1px;right:-1px;width:26px;height:26px;
  border-top:2px solid var(--primary);border-right:2px solid var(--primary);
  border-top-right-radius:var(--r-img);
  pointer-events:none;
}
.hero-figure .fig-cap{
  margin-top:10px;font-size:12px;color:var(--text-3);text-align:right;
}

/* ---------- chips ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;font-size:13px;
  color:var(--text-2);border:1px solid var(--line);
  background:rgba(16,26,43,.55);
  text-decoration:none;transition:all var(--t);
}
.chip .mono{color:var(--primary);font-size:12px}
.chip:hover,.chip:focus-visible{color:var(--text);border-color:rgba(31,216,180,.55);background:rgba(31,216,180,.09);transform:translateY(-1px)}

/* ---------- sections ---------- */
.section{padding:72px 0;position:relative;z-index:1}
.section + .section{border-top:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:32px}
.section-head h2{
  font-size:clamp(22px,2.7vw,30px);font-weight:650;
  padding-left:16px;position:relative;margin-bottom:12px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  border-radius:2px;background:var(--primary);
}
.section-head p{color:var(--text-2);font-size:15px;margin:0}
.section-head .eyebrow{
  display:block;font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  color:var(--text-3);margin-bottom:10px;
}

/* ---------- 自助入口卡 ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.entry-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 22px;display:flex;flex-direction:column;gap:10px;
  transition:transform var(--t),border-color var(--t),box-shadow var(--t),background var(--t);
}
.entry-card:hover{transform:translateY(-4px);border-color:var(--line-strong);background:var(--panel-2);box-shadow:0 18px 24px -18px rgba(0,0,0,.9)}
.entry-card .num{font-family:var(--mono);font-size:12px;color:var(--primary);letter-spacing:.1em}
.entry-card h3{font-size:18px;font-weight:600}
.entry-card p{font-size:14px;color:var(--text-2);margin:0;line-height:1.75}
.entry-card .go{
  margin-top:auto;padding-top:12px;display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--primary);
}
.entry-card:hover .go{gap:12px}
.entry-card .go i{transition:transform var(--t)}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:1fr;gap:14px;max-width:920px}
.accordion{--bs-accordion-transition:180ms cubic-bezier(.2,.7,.3,1)}
.accordion-item{
  background:var(--panel);border:1px solid var(--line);
  border-radius:12px;overflow:hidden;margin-bottom:12px;position:relative;
  transition:border-color var(--t),background var(--t);
}
.accordion-item:has(.accordion-button:not(.collapsed)){background:var(--panel-2);border-color:var(--line-strong)}
.accordion-item:has(.accordion-button:not(.collapsed))::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary);
}
.accordion-button{
  background:transparent;color:var(--text);
  font-size:16px;font-weight:600;line-height:1.6;
  padding:18px 20px 18px 18px;gap:12px;
  box-shadow:none !important;border:0;
  display:flex;align-items:flex-start;
}
.accordion-button:not(.collapsed){background:transparent;color:var(--text)}
.accordion-button:focus,.accordion-button:focus-visible{outline:2px solid var(--primary);outline-offset:-4px;border-radius:10px}
.accordion-button .q-num{
  font-family:var(--mono);font-size:12px;color:var(--primary);
  flex:0 0 auto;padding-top:4px;letter-spacing:.08em;
}
.accordion-button::after{
  background-image:none !important;
  content:"+";
  font-family:var(--mono);font-size:18px;line-height:1;
  width:24px;height:24px;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);border-radius:999px;
  color:var(--text-2);margin-left:auto;
  transition:color var(--t),border-color var(--t),transform var(--t);
}
.accordion-button:not(.collapsed)::after{
  content:"−";color:var(--primary);border-color:rgba(31,216,180,.55);
  transform:rotate(180deg);
}
.accordion-body{
  padding:0 20px 20px 52px;font-size:15px;line-height:1.9;color:var(--text-2);
}
.accordion-body strong{color:var(--text);font-weight:600}

/* ---------- 联系/表单 ---------- */
.contact-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:28px;align-items:start}
.contact-info{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;
}
.contact-info h3{font-size:19px;margin-bottom:8px}
.contact-info > p{font-size:14px;color:var(--text-2);margin-bottom:18px}
.info-list li{
  display:flex;gap:12px;padding:14px 0;border-top:1px solid var(--line);
  font-size:14px;color:var(--text-2);
}
.info-list li:first-child{border-top:0;padding-top:0}
.info-list li i{color:var(--primary);font-size:15px;margin-top:4px;flex:0 0 auto}
.info-list li b{display:block;color:var(--text);font-weight:600;margin-bottom:2px;font-size:14px}
.contact-figure{margin-top:20px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line)}
.contact-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 400ms var(--t)}
.contact-figure:hover img{transform:scale(1.03)}

.form-card{
  background:rgba(16,26,43,.62);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border:1px solid var(--line-strong);border-radius:var(--r-card);
  padding:28px 26px;
}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-hint{font-size:13px;color:var(--text-3);margin-bottom:20px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px}
.field .req{color:var(--amber);margin-left:2px}
.form-control,.form-select{
  width:100%;background:#0B1220;border:1px solid var(--line-strong);
  border-radius:var(--r-btn);color:var(--text);font-size:15px;padding:11px 14px;
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.form-control::placeholder{color:var(--text-3)}
.form-control:focus,.form-select:focus{
  outline:none;background:#0B1220;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(31,216,180,.16);color:var(--text);
}
.form-select option{background:#0B1220;color:var(--text)}
textarea.form-control{min-height:118px;resize:vertical;line-height:1.8}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text-2);margin:4px 0 20px}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--primary);flex:0 0 auto}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.form-foot .btn-main{min-width:168px}
.form-msg{
  display:none;margin-top:16px;font-size:14px;padding:12px 14px;border-radius:12px;
  border:1px solid rgba(31,216,180,.32);background:rgba(31,216,180,.08);color:var(--text);
}
.form-msg.show{display:block}
.form-msg.err{border-color:rgba(255,107,122,.4);background:rgba(255,107,122,.08)}

/* ---------- CTA 条 ---------- */
.cta-bar{
  margin-top:36px;display:flex;align-items:center;justify-content:space-between;
  gap:20px;flex-wrap:wrap;
  background:linear-gradient(90deg,rgba(31,216,180,.10),rgba(78,140,255,.06));
  border:1px solid var(--line-strong);border-radius:var(--r-card);
  padding:22px 26px;
}
.cta-bar h3{font-size:17px;margin-bottom:4px}
.cta-bar p{margin:0;font-size:14px;color:var(--text-2)}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,18,32,.9),rgba(5,8,15,.98));
  padding:56px 0 28px;position:relative;z-index:1;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(122,160,214,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(122,160,214,.03) 1px,transparent 1px);
  background-size:56px 56px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;position:relative}
.footer-brand p{font-size:13px;color:var(--text-2);margin:14px 0 16px;max-width:300px;line-height:1.8}
.footer-icons{display:flex;gap:10px}
.footer-icons a{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;color:var(--text-2);
  transition:all var(--t);font-size:14px;
}
.footer-icons a:hover{color:var(--primary);border-color:rgba(31,216,180,.5);background:rgba(31,216,180,.07);transform:translateY(-2px)}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:14px;font-weight:600}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:13px;color:var(--text-2);text-decoration:none}
.footer-col a:hover{color:var(--text)}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);position:relative;
}

/* ---------- mobile tabbar ---------- */
.tabbar{display:none}
@media (max-width:767px){
  body{padding-bottom:calc(76px + env(safe-area-inset-bottom))}
  .tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:1040;
    height:calc(62px + env(safe-area-inset-bottom));
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(5,8,15,.86);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-top:1px solid var(--line);
  }
  .tabbar a{
    flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:4px;font-size:11px;color:var(--text-3);text-decoration:none;position:relative;
    transition:color var(--t);
  }
  .tabbar a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--t)}
  .tabbar a.active{color:var(--primary)}
  .tabbar a.active svg{transform:translateY(-2px)}
  .tabbar a.active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:34px;height:2px;background:var(--primary);border-radius:2px;
    box-shadow:0 0 12px 1px rgba(31,216,180,.7);
  }
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .entry-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  .wrap{padding:0 24px}
  .nav-links{gap:18px}
  .nav-links a{font-size:14px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-figure{order:2}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:60px 0}
}
@media (max-width:767px){
  .wrap{padding:0 18px}
  .nav-inner{height:56px;gap:12px}
  .nav-links{display:none}
  .nav-actions{margin-left:auto}
  .nav-actions .btn-main{padding:10px 14px;font-size:13px}
  .brand{font-size:16px}
  .brand-mark,.brand-mark svg{width:24px;height:24px}
  .hero{padding:34px 0 42px}
  .hero h1{font-size:clamp(24px,6.4vw,30px)}
  .hero-sub{font-size:15px}
  .hero-cta .btn-main,.hero-cta .btn-ghost{flex:1 1 100%;justify-content:center}
  .search-box{flex-wrap:wrap;padding:12px 14px;border-radius:14px}
  .search-box input{width:100%;flex:1 1 100%;padding:4px 0}
  .search-box .btn-main{width:100%;margin-top:6px}
  .section{padding:48px 0}
  .entry-grid{grid-template-columns:1fr;gap:14px}
  .accordion-button{font-size:15px;padding:16px 14px}
  .accordion-body{padding:0 16px 18px 14px;font-size:14.5px}
  .form-row{grid-template-columns:1fr}
  .form-card{padding:22px 18px}
  .form-foot .btn-main{width:100%}
  .cta-bar{padding:18px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (max-width:520px){
  .chip{font-size:12px;padding:7px 12px}
  .hero-figure .fig-cap{text-align:left}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}