/* roulang page: index */
:root{
  --brand:#3b5bfd;
  --brand-2:#16b8cf;
  --brand-deep:#0b1a2b;
  --ink:#0f2438;
  --ink-2:#22394f;
  --muted:#5f7791;
  --bg:#f5f8fc;
  --surface:#ffffff;
  --line:#e2e9f3;
  --line-strong:#cdd9ea;
  --gold:#eda233;
  --grad:linear-gradient(135deg,#3b5bfd 0%,#16b8cf 100%);
  --grad-soft:linear-gradient(135deg,rgba(59,91,253,.10),rgba(22,184,207,.12));
  --radius-lg:22px;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(15,42,74,.06);
  --shadow:0 12px 30px rgba(15,42,74,.09);
  --shadow-lg:0 24px 52px rgba(15,42,74,.16);
  --container:1180px;
  --ease:.22s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(59,91,253,.45);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) 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 rgba(15,42,74,.10)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(59,91,253,.32);
}
.brand-mark svg{width:21px;height:21px}
.brand-text{font-size:16px;font-weight:800;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:8px 14px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:background var(--ease),color var(--ease);
  white-space:nowrap;
}
.nav-link:hover{background:rgba(59,91,253,.08);color:var(--brand)}
.nav-link.is-active{color:var(--brand);background:rgba(59,91,253,.11)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:11px 20px;border-radius:9px;font-size:14.5px;font-weight:700;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 22px rgba(59,91,253,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(59,91,253,.36);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(59,91,253,.3)}
.btn-ghost{background:transparent;border:1px solid var(--line-strong);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:8px}
.btn-light{background:#fff;color:var(--brand);box-shadow:var(--shadow-sm)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow);color:var(--brand)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  align-items:center;justify-content:center;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{
  content:'';position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding:74px 0 68px;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(158deg,rgba(6,18,35,.94) 0%,rgba(10,26,45,.90) 42%,rgba(17,77,118,.82) 100%);
}
.hero::after{
  content:'';position:absolute;right:-140px;top:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,184,207,.34),transparent 68%);pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:900px;margin:0 auto;text-align:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.02em;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);color:#dbeafe;
}
.hero-badge::before{content:'';width:7px;height:7px;border-radius:50%;background:#37e0c8;box-shadow:0 0 0 4px rgba(55,224,200,.22)}
.hero h1{
  margin:20px 0 0;font-size:clamp(28px,4.1vw,44px);line-height:1.24;letter-spacing:-.02em;
  text-shadow:0 4px 22px rgba(0,0,0,.28);
}
.hero h1 strong{color:#6ff0da;font-weight:800}
.hero-lead{
  margin:18px auto 0;max-width:790px;font-size:15.5px;line-height:1.85;color:rgba(229,240,252,.9);
}
.search-form{
  display:flex;align-items:center;gap:10px;margin:30px auto 0;max-width:640px;
  padding:8px;border-radius:16px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.30);
  backdrop-filter:blur(10px);box-shadow:0 18px 40px rgba(0,0,0,.22);
}
.search-form input{
  flex:1;min-width:0;border:0;background:transparent;color:#fff;
  padding:12px 14px;font-size:15px;outline:none;
}
.search-form input::placeholder{color:rgba(226,238,252,.62)}
.search-form .btn-primary{padding:12px 22px;box-shadow:none;background:#fff;color:#1b3fa8}
.search-form .btn-primary:hover{background:#eef4ff;box-shadow:0 10px 22px rgba(0,0,0,.2)}
.hero-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:9px;margin-top:18px}
.hero-chips span{font-size:13px;color:rgba(226,238,252,.7);align-self:center}
.chip{
  display:inline-flex;align-items:center;padding:7px 14px;border-radius:999px;font-size:13px;font-weight:600;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.24);color:#e6f0fb;
  transition:background var(--ease),border-color var(--ease),transform var(--ease);
}
.chip:hover{background:rgba(255,255,255,.22);border-color:rgba(255,255,255,.5);color:#fff;transform:translateY(-2px)}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:36px auto 0;max-width:830px;
}
.hero-metric{
  padding:14px 12px;border-radius:var(--radius);background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.18);text-align:center;
}
.hero-metric b{display:block;font-size:23px;font-weight:800;color:#7cf0dd;letter-spacing:-.02em}
.hero-metric small{display:block;margin-top:4px;font-size:12.5px;color:rgba(226,238,252,.76)}

/* ============ Sections ============ */
.section{padding:74px 0}
.section--alt{background:var(--bg)}
.section--dark{background:linear-gradient(135deg,#0a1728 0%,#13314f 100%);color:#e7f1fb}
.section--dark .eyebrow{color:#7cf0dd}
.section--dark p{color:rgba(224,238,251,.82)}
.section-head{max-width:760px;margin:0 auto 44px;text-align:center}
.section-head--left{margin:0 0 40px;text-align:left;max-width:820px}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:700;
  letter-spacing:.08em;color:var(--brand);
}
.eyebrow::before{content:'';width:20px;height:2px;border-radius:2px;background:var(--grad)}
.section-head h2{margin-top:13px;font-size:clamp(22px,2.9vw,31px);letter-spacing:-.015em}
.section-desc{margin-top:13px;font-size:15px;line-height:1.85;color:var(--muted)}
.section--dark .section-desc{color:rgba(219,234,250,.8)}

/* ============ Cards ============ */
.grid{display:grid;gap:20px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(59,91,253,.32)}
.card-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:var(--grad-soft);color:var(--brand);margin-bottom:15px;
}
.card-icon svg{width:21px;height:21px}
.card h3{font-size:17px;margin-bottom:9px}
.card p{font-size:14.5px;line-height:1.78;color:var(--muted)}
.card-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:15px}
.tag{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:7px;
  font-size:12px;font-weight:600;background:rgba(59,91,253,.09);color:#2c48b8;
}
.tag--gold{background:rgba(237,162,51,.14);color:#a5670c}
.tag--teal{background:rgba(22,184,207,.14);color:#0c7f8f}

/* ============ Metrics strip ============ */
.metric-card{
  text-align:center;padding:26px 18px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease);
}
.metric-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.metric-card b{
  display:block;font-size:32px;font-weight:800;letter-spacing:-.03em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric-card span{display:block;margin-top:6px;font-size:14px;font-weight:600;color:var(--ink-2)}
.metric-card small{display:block;margin-top:7px;font-size:12.5px;color:var(--muted);line-height:1.6}

/* ============ Table ============ */
.table-wrap{
  border-radius:var(--radius-lg);border:1px solid var(--line);overflow:hidden;
  background:var(--surface);box-shadow:var(--shadow);
}
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;min-width:720px}
thead th{
  background:linear-gradient(180deg,#f2f6fd,#e9f0fb);
  padding:15px 18px;text-align:left;font-size:13.5px;font-weight:700;color:var(--ink-2);
  letter-spacing:.02em;white-space:nowrap;
}
tbody td{padding:15px 18px;font-size:14.5px;color:var(--ink-2);border-top:1px solid var(--line)}
tbody tr:nth-child(even){background:#fafcff}
tbody tr:hover{background:#f2f7ff}
td.strong{font-weight:700;color:var(--ink)}
.is-recommend{background:rgba(59,91,253,.07)!important;position:relative}
.is-recommend td{border-top-color:rgba(59,91,253,.2)}
td .tag{white-space:nowrap}

/* ============ Case cards ============ */
.case-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(59,91,253,.3)}
.case-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--grad-soft)}
.case-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .45s ease}
.case-card:hover .case-media img{transform:scale(1.05)}
.case-media::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(9,24,42,0) 45%,rgba(9,24,42,.6) 100%)}
.case-body{padding:22px}
.case-body h3{font-size:16.5px;margin-bottom:9px}
.case-body p{font-size:14.5px;color:var(--muted);line-height:1.78}

/* ============ Process ============ */
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.step{
  position:relative;padding:26px 22px 24px;border-radius:var(--radius);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  transition:transform var(--ease),border-color var(--ease),background var(--ease);
}
.step:hover{transform:translateY(-4px);border-color:rgba(124,240,221,.5);background:rgba(255,255,255,.1)}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;font-size:14px;font-weight:800;
  background:var(--grad);color:#fff;margin-bottom:14px;
}
.step h3{font-size:16px;color:#fff;margin-bottom:9px}
.step p{font-size:14px;line-height:1.78;color:rgba(219,234,250,.82)}

/* ============ Channel entries ============ */
.channel-card{
  display:block;padding:28px 26px;border-radius:var(--radius-lg);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(59,91,253,.35);color:inherit}
.channel-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.channel-num{font-size:12.5px;font-weight:800;letter-spacing:.12em;color:var(--brand)}
.channel-card h3{font-size:18.5px;margin-bottom:10px}
.channel-card p{font-size:14.5px;color:var(--muted);line-height:1.78}
.channel-more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13.5px;font-weight:700;color:var(--brand)}
.channel-card:hover .channel-more{gap:10px}

/* ============ Ranking ============ */
.rank-list{border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm)}
.rank-item{
  display:grid;grid-template-columns:44px 1fr 96px 96px 84px;align-items:center;gap:12px;
  padding:16px 22px;border-top:1px solid var(--line);font-size:14.5px;
  transition:background var(--ease);
}
.rank-item:first-child{border-top:0}
.rank-item:hover{background:#f6f9ff}
.rank-no{
  width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  font-size:13px;font-weight:800;background:#eef2fb;color:var(--muted);
}
.rank-item:nth-child(1) .rank-no{background:var(--grad);color:#fff}
.rank-item:nth-child(2) .rank-no{background:rgba(59,91,253,.18);color:#2c48b8}
.rank-item:nth-child(3) .rank-no{background:rgba(22,184,207,.18);color:#0c7f8f}
.rank-title{font-weight:600;color:var(--ink)}
.rank-num{font-size:13.5px;color:var(--muted);font-weight:600}
.rank-trend{font-size:13px;font-weight:700;text-align:right}
.trend-up{color:#10897a}
.trend-flat{color:var(--muted)}
.trend-down{color:#c2683a}

/* ============ News ============ */
.news-layout{display:grid;grid-template-columns:1fr 328px;gap:32px;align-items:start}
.news-list{display:grid;gap:16px}
.news-card{
  display:block;padding:22px 24px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(59,91,253,.3);color:inherit}
.news-card h3{font-size:16.5px;margin-bottom:8px}
.news-card p{font-size:14px;color:var(--muted);line-height:1.75}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:13px;font-size:12.5px;color:var(--muted)}
.news-meta .tag{font-size:11.5px}
.empty-state{
  padding:38px 24px;text-align:center;border-radius:var(--radius);
  border:1px dashed var(--line-strong);background:#fbfdff;color:var(--muted);font-size:14.5px;
}
.side-card{
  border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--surface);
  padding:24px;box-shadow:var(--shadow-sm);position:sticky;top:88px;
}
.side-card h3{font-size:16px;margin-bottom:14px}
.side-links{display:grid;gap:10px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-radius:10px;background:#f5f8fe;
  font-size:14px;font-weight:600;color:var(--ink-2);
  transition:background var(--ease),color var(--ease),transform var(--ease);
}
.side-links a:hover{background:rgba(59,91,253,.1);color:var(--brand);transform:translateX(3px)}
.side-note{margin-top:16px;font-size:13px;line-height:1.75;color:var(--muted)}

/* ============ Partners ============ */
.partner-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.partner-item{
  padding:22px 18px;border-radius:var(--radius);text-align:center;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  transition:transform var(--ease),border-color var(--ease);
}
.partner-item:hover{transform:translateY(-4px);border-color:rgba(124,240,221,.5)}
.partner-item b{display:block;font-size:15px;color:#fff}
.partner-item small{display:block;margin-top:7px;font-size:12.5px;color:rgba(219,234,250,.72);line-height:1.65}

/* ============ Notice ============ */
.notice{
  display:flex;gap:16px;align-items:flex-start;padding:24px 26px;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,rgba(237,162,51,.10),rgba(237,162,51,.03));
  border:1px solid rgba(237,162,51,.35);
}
.notice-icon{
  flex-shrink:0;width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(237,162,51,.2);color:#a5670c;
}
.notice h3{font-size:15.5px;margin-bottom:7px;color:#7b4a05}
.notice p{font-size:14px;line-height:1.78;color:#6f5b3a}

/* ============ FAQ ============ */
.faq{display:grid;gap:14px;max-width:900px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);
  box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item:hover{border-color:rgba(59,91,253,.3);box-shadow:var(--shadow)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:19px 24px;font-size:15.5px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';flex-shrink:0;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  background:rgba(59,91,253,.1);color:var(--brand);font-size:16px;font-weight:700;
  transition:transform var(--ease),background var(--ease);
}
.faq-item[open] summary::after{content:'−';background:var(--grad);color:#fff}
.faq-body{padding:0 24px 21px;font-size:14.5px;line-height:1.85;color:var(--muted)}

/* ============ Form ============ */
.form-shell{
  display:grid;grid-template-columns:1fr 1.05fr;gap:0;border-radius:var(--radius-lg);
  overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-lg);background:var(--surface);
}
.form-aside{
  padding:40px 38px;color:#fff;
  background:linear-gradient(150deg,#12294a 0%,#1b4a86 60%,#0f7f95 100%);
  position:relative;overflow:hidden;
}
.form-aside::after{
  content:'';position:absolute;right:-90px;bottom:-90px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,240,221,.28),transparent 70%);
}
.form-aside h2{font-size:24px;margin-bottom:14px;position:relative}
.form-aside p{font-size:14.5px;line-height:1.85;color:rgba(226,240,253,.85);position:relative}
.form-aside ul{margin-top:22px;display:grid;gap:11px;position:relative}
.form-aside li{display:flex;gap:10px;font-size:14px;color:rgba(226,240,253,.9);align-items:flex-start}
.form-aside li::before{
  content:'';flex-shrink:0;width:7px;height:7px;margin-top:8px;border-radius:50%;background:#7cf0dd;
}
.form-body{padding:40px 38px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;font-weight:700;color:var(--ink-2);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 15px;border-radius:10px;border:1px solid var(--line-strong);
  background:#fbfdff;font-size:14.5px;color:var(--ink);
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(59,91,253,.13);
}
.field textarea{resize:vertical;min-height:112px;line-height:1.7}
.form-tip{margin-top:14px;font-size:13.5px;font-weight:600;min-height:20px}
.form-tip.is-error{color:#c2683a}
.form-tip.is-ok{color:#10897a}
.form-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:6px}
.form-hint{font-size:12.5px;color:var(--muted)}

/* ============ Footer ============ */
.site-footer{background:#08131f;color:#b9cbdd;padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:15px;color:#fff}
.footer-brand .brand-mark{box-shadow:none}
.footer-brand b{font-size:16px}
.site-footer p{font-size:13.5px;line-height:1.85;color:#8ea6bd}
.footer-title{font-size:14px;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:13.5px;color:#9db3c9;transition:color var(--ease),transform var(--ease)}
.footer-links a:hover{color:#7cf0dd;transform:translateX(3px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
}
.footer-bottom p{font-size:12.5px;color:#7e94ab}
.footer-bottom .domain{color:#9db3c9}

/* ============ Responsive ============ */
@media (max-width:1080px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .process{grid-template-columns:repeat(2,1fr)}
  .partner-grid{grid-template-columns:repeat(2,1fr)}
  .news-layout{grid-template-columns:1fr}
  .side-card{position:static}
  .form-shell{grid-template-columns:1fr}
  .hero-metrics{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .header-inner{height:60px;gap:12px}
  .main-nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;border-bottom:1px solid var(--line);
    padding:12px 20px 18px;box-shadow:0 18px 30px rgba(15,42,74,.14);
    display:none;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px 14px;font-size:15px;border-radius:10px}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-primary{display:none}
  .btn{padding:12px 18px}
  .section{padding:56px 0}
  .hero{padding:58px 0 54px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .process{grid-template-columns:1fr}
  .rank-item{grid-template-columns:36px 1fr 80px;gap:10px;padding:14px 16px}
  .rank-num:nth-of-type(2),.rank-trend{display:none}
  .news-card{padding:18px}
  .form-aside,.form-body{padding:30px 24px}
}
@media (max-width:560px){
  .container{padding:0 16px}
  .grid-4{grid-template-columns:1fr}
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:10px}
  .hero h1{font-size:26px}
  .hero-lead{font-size:14.5px}
  .search-form{flex-direction:column;align-items:stretch;padding:10px;border-radius:14px}
  .search-form .btn-primary{width:100%}
  .partner-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .faq-item summary{font-size:14.5px;padding:16px 18px}
  .faq-body{padding:0 18px 18px}
  .metric-card b{font-size:27px}
  .rank-item{grid-template-columns:32px 1fr;padding:13px 14px}
  .rank-num{display:none}
}

/* roulang page: article */
:root{
 --brand:#3b5bfd;
 --brand-2:#16b8cf;
 --brand-deep:#0b1a2b;
 --ink:#0f2438;
 --ink-2:#22394f;
 --muted:#5f7791;
 --bg:#f5f8fc;
 --surface:#ffffff;
 --line:#e2e9f3;
 --line-strong:#cdd9ea;
 --gold:#eda233;
 --grad:linear-gradient(135deg,#3b5bfd 0%,#16b8cf 100%);
 --grad-soft:linear-gradient(135deg,rgba(59,91,253,.10),rgba(22,184,207,.12));
 --radius-lg:22px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 2px 10px rgba(15,42,74,.06);
 --shadow:0 12px 30px rgba(15,42,74,.09);
 --shadow-lg:0 24px 52px rgba(15,42,74,.16);
 --container:1180px;
 --ease:.22s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--ink);
 background:var(--surface);
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ Header ============ */
.site-header{
 position:sticky;top:0;z-index:100;
 background:rgba(255,255,255,.92);
 backdrop-filter:saturate(180%) 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 rgba(15,42,74,.10)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
 width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
 background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(59,91,253,.32);
}
.brand-mark svg{width:21px;height:21px}
.brand-text{font-size:16px;font-weight:800;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
 padding:8px 14px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--ink-2);
 transition:background var(--ease),color var(--ease);
 white-space:nowrap;
}
.nav-link:hover{background:rgba(59,91,253,.08);color:var(--brand)}
.nav-link.is-active{color:var(--brand);background:rgba(59,91,253,.11)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:7px;
 padding:11px 20px;border-radius:9px;font-size:14.5px;font-weight:700;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
 white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 22px rgba(59,91,253,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(59,91,253,.36);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(59,91,253,.3)}
.btn-ghost{background:transparent;border:1px solid var(--line-strong);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:8px}
.btn-light{background:#fff;color:var(--brand);box-shadow:var(--shadow-sm)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow);color:var(--brand)}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
 align-items:center;justify-content:center;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{
 content:'';position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.read-progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:var(--grad);border-radius:0 2px 2px 0;transition:width .12s linear}

/* ============ Article head ============ */
.article-head{position:relative;overflow:hidden;padding:38px 0 46px;background:var(--surface);border-bottom:1px solid var(--line)}
.article-head::before{
 content:'';position:absolute;left:0;right:0;top:0;height:210px;
 background:var(--grad-soft);
 clip-path:polygon(0 0,100% 0,100% 58%,0 100%);
 z-index:0;
}
.article-head::after{
 content:'';position:absolute;right:-90px;top:-70px;width:260px;height:260px;border-radius:50%;
 background:radial-gradient(circle,rgba(22,184,207,.22),transparent 68%);z-index:0;
}
.article-head .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{opacity:.55}
.article-kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--line-strong);font-size:12.5px;font-weight:700;color:var(--brand);box-shadow:var(--shadow-sm)}
.article-kicker::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 3px rgba(22,184,207,.18)}
.article-head h1{
 margin:16px 0 0;font-size:clamp(24px,3.2vw,36px);line-height:1.3;letter-spacing:-.015em;
 max-width:920px;color:var(--ink);
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:20px;font-size:13.5px;color:var(--muted)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
.article-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--line-strong)}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{
 display:inline-flex;align-items:center;padding:6px 13px;border-radius:999px;font-size:12.5px;
 background:rgba(59,91,253,.09);color:var(--brand);font-weight:600;border:1px solid rgba(59,91,253,.16);
}

/* ============ Layout ============ */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 322px;gap:40px;padding:48px 0 12px;align-items:start}
.article-main{min-width:0}
.article-panel{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:34px 36px;box-shadow:var(--shadow-sm);
}
.article-content{font-size:16px;line-height:1.85;color:var(--ink-2)}
.article-content p{margin:0 0 18px}
.article-content p:last-child{margin-bottom:0}
.article-content h2{
 font-size:22px;line-height:1.42;margin:34px 0 14px;color:var(--ink);
 position:relative;padding-left:15px;
}
.article-content h2::before{content:'';position:absolute;left:0;top:.34em;width:4px;height:1.05em;border-radius:2px;background:var(--grad)}
.article-content h2:first-child{margin-top:0}
.article-content h3{font-size:18px;margin:26px 0 10px;color:var(--ink);font-weight:700}
.article-content ul,.article-content ol{margin:0 0 18px;padding-left:22px}
.article-content li{margin:7px 0}
.article-content strong{color:var(--ink);font-weight:700}
.article-content a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-content blockquote{
 margin:24px 0;padding:16px 20px;border-left:4px solid var(--brand-2);
 background:var(--grad-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--ink-2);
}
.article-content img{margin:24px 0;border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.article-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px}
.article-content th,.article-content td{border:1px solid var(--line);padding:10px 13px;text-align:left}
.article-content th{background:#f1f5fb;font-weight:700;color:var(--ink)}
.article-empty{padding:12px 0 4px;text-align:center}
.article-empty h2{margin:0 0 10px;font-size:21px;color:var(--ink)}
.article-empty p{margin:0 0 22px;color:var(--muted);font-size:15px}

/* ============ Aside ============ */
.article-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:18px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 20px;box-shadow:var(--shadow-sm);transition:box-shadow var(--ease),border-color var(--ease),transform var(--ease)}
.side-card:hover{box-shadow:var(--shadow);border-color:var(--line-strong);transform:translateY(-2px)}
.side-title{display:flex;align-items:center;gap:9px;font-size:14.5px;font-weight:800;color:var(--ink);margin:0 0 14px}
.side-title i{width:20px;height:20px;border-radius:7px;background:var(--grad);display:grid;place-items:center;color:#fff;font-style:normal;font-size:11px;font-weight:800}
.side-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.side-list li{display:flex;gap:10px;font-size:14px;color:var(--ink-2);line-height:1.65}
.side-list li b{flex-shrink:0;width:20px;height:20px;border-radius:6px;background:rgba(59,91,253,.1);color:var(--brand);font-size:11.5px;display:grid;place-items:center;margin-top:2px}
.side-links{display:flex;flex-direction:column;gap:2px}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 10px;border-radius:9px;font-size:14px;color:var(--ink-2);transition:background var(--ease),color var(--ease)}
.side-links a::after{content:'›';font-size:16px;color:var(--line-strong);transition:color var(--ease),transform var(--ease)}
.side-links a:hover{background:rgba(59,91,253,.07);color:var(--brand)}
.side-links a:hover::after{color:var(--brand);transform:translateX(3px)}
.side-note{font-size:13.5px;color:var(--muted);line-height:1.75;margin:0}
.side-note strong{color:var(--ink-2)}

/* ============ Sections ============ */
.section{padding:64px 0}
.section-alt{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:32px}
.section-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:800;letter-spacing:.08em;color:var(--brand);text-transform:uppercase;margin-bottom:12px}
.section-eyebrow::before{content:'';width:22px;height:3px;border-radius:2px;background:var(--grad)}
.section-head h2{margin:0;font-size:clamp(22px,2.6vw,30px);line-height:1.34;letter-spacing:-.01em;color:var(--ink)}
.section-head p{margin:12px 0 0;font-size:15px;line-height:1.8;color:var(--muted)}

/* stats strip */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:6px}
.stat{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:20px 20px 18px;box-shadow:var(--shadow-sm);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.stat .num{font-size:26px;font-weight:800;letter-spacing:-.02em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.2}
.stat .label{margin-top:6px;font-size:14px;font-weight:700;color:var(--ink)}
.stat .desc{margin-top:6px;font-size:13px;line-height:1.65;color:var(--muted)}

/* mechanics cards */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
 display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg)}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-body h3{margin:0;font-size:16.5px;line-height:1.45;color:var(--ink)}
.card-body p{margin:0;font-size:14px;line-height:1.75;color:var(--muted)}
.card-badges{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto;padding-top:12px}
.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;background:rgba(59,91,253,.08);color:var(--brand)}
.badge-alt{background:rgba(22,184,207,.12);color:#0e8b9d}
.badge-gold{background:rgba(237,162,51,.15);color:#a86d0c}

/* deep dive (卖点摘要条 + 长文) */
.brief{
 display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;
 padding:18px 24px;border-radius:var(--radius);background:var(--grad-soft);
 border:1px solid rgba(59,91,253,.16);margin:0 0 28px;
}
.brief span{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--ink-2)}
.brief span::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--brand)}
.longform{max-width:860px;color:var(--ink-2);font-size:16px;line-height:1.85}
.longform h3{font-size:19px;margin:30px 0 12px;color:var(--ink)}
.longform h3:first-child{margin-top:0}
.longform p{margin:0 0 18px}
.longform ul{margin:0 0 18px;padding-left:22px}
.longform li{margin:7px 0}
.longform strong{color:var(--ink)}
.inline-cta{
 display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
 margin:28px 0 0;padding:22px 26px;border-radius:var(--radius);
 background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.inline-cta p{margin:0;font-size:15px;font-weight:700;color:var(--ink)}
.inline-cta small{display:block;margin-top:4px;font-size:13.5px;font-weight:400;color:var(--muted)}

/* CTA band */
.cta-band{
 position:relative;overflow:hidden;color:#fff;border-radius:var(--radius-lg);
 padding:44px 46px;background:url('/assets/images/backpic/back-4.webp') center/cover no-repeat;
 box-shadow:var(--shadow);
}
.cta-band::before{content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(8,22,42,.94),rgba(18,86,120,.86))}
.cta-band-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px}
.cta-band h2{margin:0;font-size:clamp(21px,2.4vw,28px);line-height:1.35;letter-spacing:-.01em}
.cta-band p{margin:10px 0 0;font-size:15px;color:rgba(226,238,252,.86);max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff}

/* next steps cards */
.link-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.link-card{
 display:flex;flex-direction:column;gap:10px;padding:24px 24px 22px;border-radius:var(--radius);
 background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);color:inherit}
.link-card .lc-icon{width:40px;height:40px;border-radius:12px;background:var(--grad);display:grid;place-items:center;color:#fff;box-shadow:0 8px 18px rgba(59,91,253,.28)}
.link-card .lc-icon svg{width:20px;height:20px}
.link-card h3{margin:0;font-size:16.5px;color:var(--ink)}
.link-card p{margin:0;font-size:14px;line-height:1.75;color:var(--muted)}
.link-card .lc-more{margin-top:6px;font-size:13.5px;font-weight:700;color:var(--brand)}

/* FAQ */
.faq-wrap{max-width:900px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 margin-bottom:12px;box-shadow:var(--shadow-sm);overflow:hidden;
 transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:rgba(59,91,253,.3);box-shadow:var(--shadow)}
.faq-item summary{
 list-style:none;cursor:pointer;padding:18px 52px 18px 22px;position:relative;
 font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:'';position:absolute;right:22px;top:50%;width:9px;height:9px;
 border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
 transform:translateY(-70%) rotate(45deg);transition:transform var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-item .faq-body{padding:0 22px 20px;font-size:14.5px;line-height:1.85;color:var(--muted)}
.faq-item .faq-body p{margin:0}

/* ============ Footer ============ */
.site-footer{background:#0b1a2b;color:#c8d6e6;padding:56px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;color:#fff;font-size:16px}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px}
.site-footer p{margin:0;font-size:14px;line-height:1.85;color:rgba(200,214,230,.78)}
.footer-title{font-size:14.5px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(200,214,230,.78);transition:color var(--ease),transform var(--ease);display:inline-block}
.footer-links a:hover{color:#6ff0da;transform:translateX(3px)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;padding-top:22px}
.footer-bottom .domain{font-size:13px;color:rgba(200,214,230,.55);letter-spacing:.02em}

/* ============ Responsive ============ */
@media (max-width:1024px){
 .article-layout{grid-template-columns:minmax(0,1fr);gap:28px;padding-top:36px}
 .article-side{position:static;flex-direction:row;flex-wrap:wrap}
 .article-side .side-card{flex:1 1 280px}
 .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
 .link-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
 .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
 .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:860px){
 .main-nav{
  position:absolute;left:0;right:0;top:64px;
  flex-direction:column;align-items:stretch;gap:2px;margin:0;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 18px 32px rgba(15,42,74,.14);
  padding:12px 18px 16px;display:none;
 }
 .main-nav.is-open{display:flex}
 .nav-link{padding:12px 12px;font-size:15px}
 .nav-toggle{display:inline-flex}
 .header-actions .btn-primary{display:none}
 .article-panel{padding:26px 22px}
 .cta-band{padding:34px 26px}
 .section{padding:52px 0}
}
@media (max-width:768px){
 .grid-3,.grid-2,.link-cards{grid-template-columns:minmax(0,1fr)}
 .footer-grid{grid-template-columns:1fr;gap:26px}
 .article-head{padding:28px 0 36px}
 .article-head::before{height:170px}
 .inline-cta{padding:20px}
}
@media (max-width:520px){
 .container{padding:0 16px}
 .brand-text{font-size:14.6px}
 .article-head h1{font-size:23px}
 .article-meta{font-size:12.8px;gap:8px 14px}
 .stats{grid-template-columns:1fr}
 .section{padding:42px 0}
 .cta-actions .btn{width:100%}
 .footer-bottom{flex-direction:column;align-items:flex-start}
 .side-links a{padding:11px 10px}
 .btn{min-height:42px}
}

/* roulang page: category1 */
:root{
 --brand:#3b5bfd;
 --brand-2:#16b8cf;
 --brand-deep:#0b1a2b;
 --ink:#0f2438;
 --ink-2:#22394f;
 --muted:#5f7791;
 --bg:#f5f8fc;
 --surface:#ffffff;
 --line:#e2e9f3;
 --line-strong:#cdd9ea;
 --gold:#eda233;
 --grad:linear-gradient(135deg,#3b5bfd 0%,#16b8cf 100%);
 --grad-soft:linear-gradient(135deg,rgba(59,91,253,.10),rgba(22,184,207,.12));
 --radius-lg:22px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 2px 10px rgba(15,42,74,.06);
 --shadow:0 12px 30px rgba(15,42,74,.09);
 --shadow-lg:0 24px 52px rgba(15,42,74,.16);
 --container:1180px;
 --ease:.22s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;line-height:1.75;color:var(--ink);background:var(--surface);
 -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid rgba(59,91,253,.45);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ Header ============ */
.site-header{
 position:sticky;top:0;z-index:100;
 background:rgba(255,255,255,.92);
 backdrop-filter:saturate(180%) 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 rgba(15,42,74,.10)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
 width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
 background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(59,91,253,.32);
}
.brand-mark svg{width:21px;height:21px}
.brand-text{font-size:16px;font-weight:800;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
 padding:8px 14px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--ink-2);
 transition:background var(--ease),color var(--ease);white-space:nowrap;
}
.nav-link:hover{background:rgba(59,91,253,.08);color:var(--brand)}
.nav-link.is-active{color:var(--brand);background:rgba(59,91,253,.11)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:7px;
 padding:11px 20px;border-radius:9px;font-size:14.5px;font-weight:700;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
 white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 22px rgba(59,91,253,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(59,91,253,.36);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(59,91,253,.3)}
.btn-ghost{background:transparent;border:1px solid var(--line-strong);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:8px}
.btn-light{background:#fff;color:var(--brand);box-shadow:var(--shadow-sm)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow);color:var(--brand)}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
 align-items:center;justify-content:center;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{
 content:'';position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ Page Hero ============ */
.page-hero{
 position:relative;overflow:hidden;color:#fff;
 background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
 padding:56px 0 64px;
}
.page-hero::before{
 content:'';position:absolute;inset:0;
 background:linear-gradient(122deg,rgba(6,18,35,.95) 0%,rgba(10,30,52,.90) 52%,rgba(17,86,124,.80) 100%);
}
.page-hero::after{
 content:'';position:absolute;left:-160px;bottom:-180px;width:420px;height:420px;border-radius:50%;
 background:radial-gradient(circle,rgba(59,91,253,.32),transparent 70%);pointer-events:none;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(210,226,244,.72);margin-bottom:18px}
.crumb a{color:rgba(210,226,244,.72)}
.crumb a:hover{color:#fff}
.crumb i{font-style:normal;opacity:.5}
.hero-badge{
 display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
 font-size:12.5px;font-weight:600;letter-spacing:.02em;
 background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);color:#dbeafe;
}
.hero-badge::before{content:'';width:7px;height:7px;border-radius:50%;background:#37e0c8;box-shadow:0 0 0 4px rgba(55,224,200,.22)}
.page-hero h1{
 margin:16px 0 0;font-size:clamp(26px,3.6vw,40px);line-height:1.26;letter-spacing:-.02em;
 text-shadow:0 4px 20px rgba(0,0,0,.3);
}
.page-hero h1 strong{color:#6ff0da;font-weight:800}
.hero-lead{margin-top:16px;max-width:620px;font-size:15px;line-height:1.85;color:rgba(226,238,252,.88)}
.lookup-form{
 display:flex;align-items:center;gap:10px;margin-top:26px;max-width:540px;padding:7px;border-radius:16px;
 background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);
 backdrop-filter:blur(10px);box-shadow:0 18px 40px rgba(0,0,0,.22);
}
.lookup-form input{
 flex:1;min-width:0;border:0;background:transparent;color:#fff;padding:11px 14px;font-size:14.5px;outline:none;
}
.lookup-form input::placeholder{color:rgba(226,238,252,.6)}
.lookup-form .btn-primary{box-shadow:none;background:#fff;color:#1b3fa8;padding:11px 20px}
.lookup-form .btn-primary:hover{background:#eef4ff;box-shadow:0 10px 22px rgba(0,0,0,.2);color:#1b3fa8}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.chip{
 display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;
 font-size:12.5px;font-weight:600;color:#dbeafe;
 background:rgba(255,255,255,.11);border:1px solid rgba(255,255,255,.24);
}
.hero-panel{
 background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.22);
 border-radius:var(--radius-lg);padding:22px 22px 14px;backdrop-filter:blur(12px);
 box-shadow:0 24px 50px rgba(0,0,0,.26);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px}
.panel-head b{font-size:14.5px;color:#fff;letter-spacing:.02em}
.panel-head span{font-size:11.5px;color:rgba(226,238,252,.6)}
.panel-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.16);font-size:13.8px}
.panel-row:last-child{border-bottom:0}
.panel-row span{color:rgba(226,238,252,.76)}
.panel-row b{color:#6ff0da;font-weight:700;white-space:nowrap}

/* ============ Common Section ============ */
.section{padding:72px 0}
.section-alt{background:var(--bg)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:34px;flex-wrap:wrap}
.eyebrow{
 display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:700;letter-spacing:.14em;
 color:var(--brand);text-transform:uppercase;margin-bottom:10px;
}
.eyebrow::before{content:'';width:24px;height:3px;border-radius:3px;background:var(--grad)}
.section-title{font-size:clamp(21px,2.5vw,29px);line-height:1.34;letter-spacing:-.01em}
.section-title strong{color:var(--brand)}
.section-desc{margin-top:12px;max-width:640px;color:var(--muted);font-size:14.8px;line-height:1.8}

/* ============ Metrics ============ */
.metrics{padding:0;margin-top:-34px;position:relative;z-index:5}
.metric-bar{
 display:grid;grid-template-columns:repeat(4,1fr);gap:1px;overflow:hidden;
 background:var(--line);border:1px solid var(--line);border-radius:var(--radius-lg);
 box-shadow:var(--shadow);
}
.metric{background:#fff;padding:24px 22px;text-align:left}
.metric b{display:block;font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.02em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.metric span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted)}

/* ============ Card Grid ============ */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{
 display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card-thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.card-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s ease}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:9px;flex:1}
.card-title{font-size:16.5px;font-weight:800;line-height:1.45}
.card-text{font-size:14px;line-height:1.75;color:var(--muted);flex:1}
.tag-row{display:flex;flex-wrap:wrap;gap:7px}
.tag{
 display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;
 font-size:12px;font-weight:700;color:#2c46c8;background:rgba(59,91,253,.10);
}
.tag-cyan{color:#0e8fa2;background:rgba(22,184,207,.14)}
.tag-gold{color:#a9701a;background:rgba(237,162,51,.18)}

/* ============ Table ============ */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-sm)}
.data-table{width:100%;min-width:760px;border-collapse:collapse;font-size:14.5px}
.data-table caption{text-align:left;padding:16px 18px 0;font-size:13px;color:var(--muted)}
.data-table th{
 background:var(--grad-soft);color:var(--ink-2);text-align:left;font-size:13.5px;font-weight:800;
 padding:14px 18px;letter-spacing:.02em;white-space:nowrap;
}
.data-table td{padding:14px 18px;border-top:1px solid var(--line);color:var(--ink-2);vertical-align:top}
.data-table tbody tr{transition:background var(--ease)}
.data-table tbody tr:hover{background:#f8fbff}
.data-table .em{font-weight:800;color:var(--brand)}
.data-table .tip{color:var(--muted);font-size:13.5px}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:800;white-space:nowrap}
.badge-low{background:rgba(22,184,207,.15);color:#0e8fa2}
.badge-mid{background:rgba(59,91,253,.13);color:#2c46c8}
.badge-high{background:rgba(237,162,51,.18);color:#a9701a}
.table-note{margin-top:16px;font-size:13.5px;color:var(--muted);display:flex;gap:10px;align-items:flex-start}
.table-note::before{content:'';flex-shrink:0;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--brand-2)}

/* ============ Turret Matrix ============ */
.turret-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.turret{
 position:relative;padding:24px 20px;border-radius:var(--radius);background:#fff;
 border:1px solid var(--line);box-shadow:var(--shadow-sm);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.turret:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(59,91,253,.35)}
.turret-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}
.turret-range{
 font-size:13px;font-weight:800;color:#fff;background:var(--grad);
 padding:5px 12px;border-radius:999px;letter-spacing:.02em;
}
.turret-top small{font-size:12px;color:var(--muted);font-weight:700}
.turret h3{font-size:17px;font-weight:800;margin-bottom:10px}
.turret ul{display:flex;flex-direction:column;gap:8px;font-size:13.8px;color:var(--muted)}
.turret li{display:flex;gap:8px;line-height:1.65}
.turret li::before{content:'';flex-shrink:0;width:5px;height:5px;margin-top:9px;border-radius:50%;background:var(--brand-2)}
.turret li b{color:var(--ink-2)}

/* ============ Timeline ============ */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{
 position:relative;padding:26px 22px 24px;background:#fff;border-radius:var(--radius);
 border:1px solid var(--line);box-shadow:var(--shadow-sm);
 transition:transform var(--ease),box-shadow var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step-no{
 counter-increment:step;display:inline-flex;align-items:center;justify-content:center;
 width:38px;height:38px;border-radius:12px;background:var(--grad-soft);color:var(--brand);
 font-weight:800;font-size:15px;margin-bottom:14px;
}
.step-no::before{content:"0" counter(step)}
.step h3{font-size:16px;font-weight:800;margin-bottom:8px}
.step p{font-size:13.8px;color:var(--muted);line-height:1.75}

/* ============ News List ============ */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px;flex-wrap:wrap}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{
 display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
 border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.post-cover{aspect-ratio:16/9;overflow:hidden}
.post-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s ease}
.post-card:hover .post-cover img{transform:scale(1.04)}
.post-body{padding:18px;display:flex;flex-direction:column;gap:9px;flex:1}
.post-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--muted)}
.post-meta .post-cat{color:#2c46c8;font-weight:800;background:rgba(59,91,253,.10);padding:2px 9px;border-radius:999px}
.post-title{font-size:16px;font-weight:800;line-height:1.5}
.post-title a:hover{color:var(--brand)}
.post-excerpt{font-size:13.6px;color:var(--muted);line-height:1.72;flex:1}
.post-more{font-size:13px;font-weight:800;color:var(--brand);display:inline-flex;align-items:center;gap:5px}
.post-more::after{content:'→';transition:transform var(--ease)}
.post-card:hover .post-more::after{transform:translateX(3px)}
.empty-state{
 padding:48px 24px;text-align:center;border:1px dashed var(--line-strong);border-radius:var(--radius);
 color:var(--muted);font-size:14px;background:#fff;
}

/* ============ Assurance (dark) ============ */
.assurance{
 position:relative;overflow:hidden;color:#e6f0fb;
 background:linear-gradient(128deg,#0b1a2b 0%,#122c47 58%,#134a63 100%);
}
.assurance::after{
 content:'';position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
 background:radial-gradient(circle,rgba(22,184,207,.28),transparent 68%);pointer-events:none;
}
.assurance .section-title{color:#fff}
.assurance .section-desc{color:rgba(210,226,244,.78)}
.assurance .eyebrow{color:#6ff0da}
.assurance .eyebrow::before{background:linear-gradient(135deg,#6ff0da,#3b5bfd)}
.assure-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:8px}
.assure{
 padding:24px 20px;border-radius:var(--radius);
 background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
 transition:transform var(--ease),background var(--ease),border-color var(--ease);
}
.assure:hover{transform:translateY(-4px);background:rgba(255,255,255,.11);border-color:rgba(111,240,218,.4)}
.assure h3{font-size:15.5px;font-weight:800;color:#fff;margin-bottom:8px}
.assure p{font-size:13.6px;line-height:1.72;color:rgba(210,226,244,.78)}

/* ============ Quick answers & FAQ ============ */
.qa-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:44px}
.qa{
 padding:22px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);
 box-shadow:var(--shadow-sm);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.qa:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(59,91,253,.3)}
.qa q{display:block;font-size:15px;font-weight:800;color:var(--ink);line-height:1.5;margin-bottom:10px;quotes:none}
.qa p{font-size:13.8px;color:var(--muted);line-height:1.75}
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px}
.faq-item{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:rgba(59,91,253,.32);box-shadow:var(--shadow)}
.faq-item summary{
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 padding:18px 22px;font-size:15px;font-weight:800;cursor:pointer;list-style:none;
 transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:'+';flex-shrink:0;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
 background:rgba(59,91,253,.10);color:var(--brand);font-size:16px;font-weight:800;transition:transform var(--ease),background var(--ease);
}
.faq-item[open] summary{color:var(--brand)}
.faq-item[open] summary::after{content:'−';background:rgba(59,91,253,.16);transform:rotate(180deg)}
.faq-item p{padding:0 22px 20px;font-size:14.2px;color:var(--muted);line-height:1.8}

/* ============ CTA band ============ */
.cta-band{
 position:relative;overflow:hidden;background:var(--grad);color:#fff;padding:64px 0;
}
.cta-band::after{
 content:'';position:absolute;left:50%;bottom:-220px;width:560px;height:560px;transform:translateX(-50%);
 border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 66%);pointer-events:none;
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.cta-band h2{font-size:clamp(22px,2.8vw,32px);line-height:1.3;letter-spacing:-.01em}
.cta-band p{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.9);max-width:520px}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.cta-points span{
 font-size:12.8px;font-weight:700;padding:6px 14px;border-radius:999px;
 background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.32);
}
.cta-form{
 background:#fff;border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-lg);color:var(--ink);
}
.cta-form h3{font-size:17px;font-weight:800;margin-bottom:6px}
.cta-form .form-tip{font-size:13px;color:var(--muted);margin-bottom:18px;line-height:1.7}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:800;color:var(--ink-2);margin-bottom:7px}
.field input,.field select{
 width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line-strong);
 background:#fbfdff;font-size:14.5px;outline:none;
 transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field input:focus,.field select:focus{
 border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(59,91,253,.14);
}
.cta-form .btn{width:100%;margin-top:6px}
.form-note{margin-top:12px;font-size:12.5px;color:var(--muted);line-height:1.7}

/* ============ Footer ============ */
.site-footer{background:#0b1a2b;color:#c6d5e6;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:42px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:800;margin-bottom:14px}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px}
.footer-brand .brand-mark svg{width:19px;height:19px}
.site-footer p{font-size:13.8px;line-height:1.8;color:#95abc2}
.footer-title{font-size:14px;font-weight:800;color:#fff;margin-bottom:14px;letter-spacing:.04em}
.footer-links{display:flex;flex-direction:column;gap:9px;font-size:14px}
.footer-links a{color:#9db2c9}
.footer-links a:hover{color:#6ff0da}
.footer-bottom{
 border-top:1px solid rgba(255,255,255,.12);padding:18px 0;
 display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
 font-size:13px;color:#8299b2;
}
.footer-bottom .domain{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px;letter-spacing:.01em}

/* ============ Responsive ============ */
@media (max-width:1024px){
 .hero-grid{grid-template-columns:1fr;gap:34px}
 .hero-panel{max-width:560px}
 .metric-bar{grid-template-columns:repeat(2,1fr)}
 .card-grid{grid-template-columns:repeat(2,1fr)}
 .turret-grid{grid-template-columns:repeat(2,1fr)}
 .timeline{grid-template-columns:repeat(2,1fr)}
 .news-grid{grid-template-columns:repeat(2,1fr)}
 .assure-grid{grid-template-columns:repeat(2,1fr)}
 .qa-grid{grid-template-columns:1fr}
 .cta-grid{grid-template-columns:1fr;gap:32px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:860px){
 .header-inner{height:60px;gap:14px}
 .nav-toggle{display:inline-flex}
 .main-nav{
  position:absolute;left:0;right:0;top:100%;margin-left:0;
  flex-direction:column;align-items:stretch;gap:4px;padding:12px 18px 18px;
  background:#fff;border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(15,42,74,.14);
  display:none;
 }
 .main-nav.is-open{display:flex}
 .nav-link{padding:12px 14px;font-size:15px}
 .header-actions .btn-sm{display:none}
 .section{padding:56px 0}
 .page-hero{padding:44px 0 56px}
}
@media (max-width:768px){
 .section-head{flex-direction:column;align-items:flex-start;gap:14px}
 .card-grid{grid-template-columns:1fr}
 .news-grid{grid-template-columns:1fr}
 .assure-grid{grid-template-columns:1fr}
 .timeline{grid-template-columns:1fr}
 .turret-grid{grid-template-columns:1fr}
 .metrics{margin-top:-24px}
}
@media (max-width:520px){
 .container{padding:0 16px}
 .brand-text{font-size:14.5px}
 .metric-bar{grid-template-columns:1fr 1fr}
 .metric{padding:18px 16px}
 .lookup-form{flex-direction:column;align-items:stretch;padding:10px;border-radius:14px}
 .lookup-form .btn-primary{width:100%}
 .hero-tags{gap:7px}
 .chip{font-size:12px;padding:5px 11px}
 .footer-grid{grid-template-columns:1fr;gap:28px}
 .footer-bottom{flex-direction:column;align-items:flex-start}
 .cta-form{padding:20px}
 .faq-item summary{padding:15px 16px;font-size:14.2px}
 .faq-item p{padding:0 16px 18px}
}

/* roulang page: category2 */
:root{
  --brand:#3b5bfd;
  --brand-2:#16b8cf;
  --brand-deep:#0b1a2b;
  --ink:#0f2438;
  --ink-2:#22394f;
  --muted:#5f7791;
  --bg:#f5f8fc;
  --surface:#ffffff;
  --line:#e2e9f3;
  --line-strong:#cdd9ea;
  --gold:#eda233;
  --grad:linear-gradient(135deg,#3b5bfd 0%,#16b8cf 100%);
  --grad-soft:linear-gradient(135deg,rgba(59,91,253,.10),rgba(22,184,207,.12));
  --radius-lg:22px;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(15,42,74,.06);
  --shadow:0 12px 30px rgba(15,42,74,.09);
  --shadow-lg:0 24px 52px rgba(15,42,74,.16);
  --container:1180px;
  --ease:.22s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) 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 rgba(15,42,74,.10)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(59,91,253,.32);
}
.brand-mark svg{width:21px;height:21px}
.brand-text{font-size:16px;font-weight:800;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:8px 14px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:background var(--ease),color var(--ease);white-space:nowrap;
}
.nav-link:hover{background:rgba(59,91,253,.08);color:var(--brand)}
.nav-link.is-active{color:var(--brand);background:rgba(59,91,253,.11)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:11px 20px;border-radius:9px;font-size:14.5px;font-weight:700;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 22px rgba(59,91,253,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(59,91,253,.36);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(59,91,253,.3)}
.btn-ghost{background:transparent;border:1px solid var(--line-strong);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-light{background:#fff;color:#1b3fa8;box-shadow:0 10px 24px rgba(6,20,45,.18)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(6,20,45,.26);color:#15328a}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:8px}
.btn-lg{padding:14px 26px;font-size:15.5px;border-radius:10px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  align-items:center;justify-content:center;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{
  content:'';position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding:64px 0 88px;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(158deg,rgba(6,18,35,.95) 0%,rgba(10,26,45,.91) 45%,rgba(17,77,118,.83) 100%);
}
.hero::after{
  content:'';position:absolute;right:-150px;top:-140px;width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,184,207,.32),transparent 68%);pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;
  gap:48px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.02em;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);color:#dbeafe;
}
.hero-badge::before{content:'';width:7px;height:7px;border-radius:50%;background:#37e0c8;box-shadow:0 0 0 4px rgba(55,224,200,.22)}
.hero h1{
  margin:18px 0 0;font-size:clamp(27px,3.5vw,41px);line-height:1.26;
  text-shadow:0 4px 22px rgba(0,0,0,.28);
}
.hero h1 strong{color:#6ff0da;font-weight:800}
.hero-lead{
  margin:16px 0 0;max-width:600px;font-size:15.5px;line-height:1.85;color:rgba(229,240,252,.9);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.chip{
  display:inline-flex;align-items:center;padding:7px 14px;border-radius:999px;font-size:13px;
  color:#dbeafe;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.22);
  transition:background var(--ease),border-color var(--ease);
}
.chip:hover{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.4);color:#fff}

/* 快捷入口网格 */
.quick-panel{
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.24);
  border-radius:var(--radius-lg);
  padding:20px;
  backdrop-filter:blur(12px);
  box-shadow:0 24px 52px rgba(3,12,28,.34);
}
.quick-panel-title{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;font-weight:700;letter-spacing:.08em;color:rgba(219,234,254,.75);
  text-transform:uppercase;margin-bottom:14px;
}
.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.quick-item{
  display:flex;flex-direction:column;gap:6px;
  padding:14px 14px 15px;border-radius:var(--radius);
  background:rgba(255,255,255,.92);
  border:1px solid rgba(255,255,255,.6);
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease);
  min-height:92px;
}
.quick-item:hover{transform:translateY(-3px);box-shadow:0 16px 30px rgba(3,12,28,.28);background:#fff;color:var(--ink)}
.quick-item .qi-icon{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:var(--grad-soft);color:var(--brand);
}
.quick-item .qi-icon svg{width:16px;height:16px}
.quick-item b{font-size:14.5px;color:var(--ink);line-height:1.4}
.quick-item span{font-size:12.5px;color:var(--muted);line-height:1.5}

/* ============ 指标看板 ============ */
.stats-strip{position:relative;z-index:3;margin-top:-46px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 18px;box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.stat-card .stat-num{
  font-size:26px;font-weight:800;letter-spacing:-.02em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  line-height:1.2;
}
.stat-card .stat-num small{font-size:14px;font-weight:700;-webkit-text-fill-color:var(--muted);color:var(--muted)}
.stat-card .stat-label{margin-top:6px;font-size:13.5px;font-weight:700;color:var(--ink-2)}
.stat-card .stat-desc{margin-top:4px;font-size:12.5px;color:var(--muted);line-height:1.6}

/* ============ Section 基础 ============ */
.section{padding:72px 0}
.section-alt{background:var(--bg)}
.section-head{max-width:760px;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:800;letter-spacing:.12em;color:var(--brand);
  text-transform:uppercase;
}
.eyebrow::before{content:'';width:22px;height:2px;border-radius:2px;background:var(--grad)}
.section-head.center .eyebrow::before{display:none}
.section-head h2{margin-top:12px;font-size:clamp(22px,2.4vw,30px);font-weight:800;color:var(--ink)}
.section-head p{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.85}

/* ============ 场景卡片 ============ */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:var(--grad-soft);color:var(--brand);margin-bottom:14px;
}
.card-icon svg{width:21px;height:21px}
.card h3{font-size:16.5px;font-weight:800;color:var(--ink)}
.card p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.75}
.card-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto;padding-top:16px}
.tag{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:700;color:var(--brand);
  background:rgba(59,91,253,.09);border:1px solid rgba(59,91,253,.16);
}
.tag.gold{color:#9a6206;background:rgba(237,162,51,.14);border-color:rgba(237,162,51,.3)}

/* ============ 炮台档位对照 ============ */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.split-media{position:relative}
.split-media img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.split-media .media-badge{
  position:absolute;left:18px;bottom:18px;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 15px;border-radius:999px;font-size:12.5px;font-weight:700;color:#fff;
  background:rgba(11,26,43,.82);border:1px solid rgba(255,255,255,.22);
  backdrop-filter:blur(6px);
}
.table-wrap{
  margin-top:22px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);
}
table.spec{width:100%;border-collapse:collapse;font-size:14px}
table.spec thead th{
  background:var(--grad-soft);color:var(--ink-2);font-weight:800;font-size:13px;
  text-align:left;padding:13px 16px;letter-spacing:.02em;border-bottom:1px solid var(--line);
}
table.spec tbody td{padding:13px 16px;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top}
table.spec tbody tr:last-child td{border-bottom:0}
table.spec tbody tr{transition:background var(--ease)}
table.spec tbody tr:hover{background:rgba(59,91,253,.04)}
table.spec td b{color:var(--ink);font-weight:800}
.note-list{margin-top:22px;display:grid;gap:12px}
.note-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 16px;border-radius:var(--radius-sm);
  background:var(--surface);border:1px solid var(--line);
}
.note-item .dot{
  width:8px;height:8px;border-radius:50%;background:var(--grad);flex-shrink:0;margin-top:9px;
}
.note-item p{font-size:14px;color:var(--ink-2);line-height:1.75;margin:0}

/* ============ 流程 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.step{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 20px 20px;box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;font-size:13px;font-weight:800;color:#fff;
  background:var(--grad);box-shadow:0 8px 18px rgba(59,91,253,.28);margin-bottom:14px;
}
.step h3{font-size:15.5px;font-weight:800;color:var(--ink)}
.step p{margin-top:8px;font-size:13.8px;color:var(--muted);line-height:1.75}

/* ============ 误区对照 ============ */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.compare-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.compare-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.compare-card.bad{border-top:3px solid #e08a6b}
.compare-card.good{border-top:3px solid var(--brand-2)}
.compare-card h3{font-size:16px;font-weight:800;display:flex;align-items:center;gap:9px}
.compare-card h3 .mc{
  width:26px;height:26px;border-radius:8px;display:grid;place-items:center;flex-shrink:0;
}
.compare-card.bad h3 .mc{background:rgba(224,138,107,.16);color:#b8573a}
.compare-card.good h3 .mc{background:rgba(22,184,207,.16);color:#0e8ba0}
.compare-card h3 .mc svg{width:15px;height:15px}
.compare-list{margin-top:16px;display:grid;gap:12px}
.compare-list li{
  display:flex;gap:10px;font-size:14px;color:var(--ink-2);line-height:1.7;
}
.compare-list li::before{
  content:'';width:6px;height:6px;border-radius:50%;background:var(--line-strong);
  flex-shrink:0;margin-top:10px;
}
.compare-card.good .compare-list li::before{background:var(--brand-2)}
.compare-card.bad .compare-list li::before{background:#e08a6b}

/* ============ 频道矩阵 ============ */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.channel-card{
  position:relative;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  display:flex;flex-direction:column;
}
.channel-card::after{
  content:'';position:absolute;right:-40px;top:-40px;width:130px;height:130px;border-radius:50%;
  background:var(--grad-soft);opacity:.85;transition:transform var(--ease);
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);color:var(--ink)}
.channel-card:hover::after{transform:scale(1.15)}
.channel-card .cc-tag{
  position:relative;z-index:1;font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--brand);
  text-transform:uppercase;
}
.channel-card h3{position:relative;z-index:1;margin-top:10px;font-size:18px;font-weight:800;color:var(--ink)}
.channel-card p{position:relative;z-index:1;margin-top:10px;font-size:14px;color:var(--muted);line-height:1.75}
.channel-card .cc-more{
  position:relative;z-index:1;margin-top:18px;display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;font-weight:800;color:var(--brand);
}
.channel-card .cc-more svg{width:15px;height:15px;transition:transform var(--ease)}
.channel-card:hover .cc-more svg{transform:translateX(4px)}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:rgba(59,91,253,.32);box-shadow:var(--shadow)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:15.5px;font-weight:800;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  width:24px;height:24px;border-radius:7px;display:grid;place-items:center;flex-shrink:0;
  background:var(--grad-soft);color:var(--brand);transition:transform var(--ease);
}
.faq-item summary .plus svg{width:13px;height:13px}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-body{padding:0 22px 20px;font-size:14.2px;color:var(--muted);line-height:1.85}
.faq-body p{margin-bottom:10px}

/* ============ CTA ============ */
.cta-band{padding:0 0 76px}
.cta-inner{
  position:relative;overflow:hidden;
  background:url('/assets/images/backpic/back-5.webp') center/cover no-repeat;
  border-radius:var(--radius-lg);
  padding:48px 44px;
  color:#fff;
  box-shadow:var(--shadow-lg);
}
.cta-inner::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(8,22,42,.95) 0%,rgba(20,52,120,.9) 58%,rgba(17,120,138,.82) 100%);
}
.cta-content{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-content h2{font-size:clamp(21px,2.3vw,28px);font-weight:800;color:#fff}
.cta-content p{margin-top:10px;max-width:620px;font-size:14.8px;color:rgba(226,238,252,.86);line-height:1.8}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ============ Footer ============ */
.site-footer{background:var(--brand-deep);color:#c6d5e6;padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:800}
.footer-brand .brand-mark{box-shadow:none}
.site-footer p{font-size:14px;line-height:1.85;color:#9fb3c9;margin-top:16px;max-width:420px}
.footer-title{font-size:14px;font-weight:800;color:#fff;margin-bottom:14px;letter-spacing:.02em}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:#9fb3c9;transition:color var(--ease),transform var(--ease);display:inline-block}
.footer-links a:hover{color:#6ff0da;transform:translateX(3px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;align-items:center;justify-content:space-between;
  gap:14px;flex-wrap:wrap;font-size:13.5px;color:#8299b1;
}
.footer-bottom p{margin:0;font-size:13.5px;color:#8299b1;max-width:none}
.footer-bottom .domain{color:#6b8299;letter-spacing:.02em}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-lead{max-width:none}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:30px}
  .channel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .main-nav{
    display:none;position:absolute;top:64px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;padding:12px 16px 16px;
    border-bottom:1px solid var(--line);
    box-shadow:0 18px 34px rgba(15,42,74,.14);
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px 14px;font-size:15px}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-sm{display:none}
  .section{padding:52px 0}
  .hero{padding:48px 0 84px}
  .hero-actions .btn{flex:1 1 auto;justify-content:center}
  .quick-grid{grid-template-columns:1fr 1fr}
  .compare{grid-template-columns:1fr}
  .channel-grid{grid-template-columns:1fr}
  .cta-inner{padding:34px 24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .stats-grid{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .quick-grid{grid-template-columns:1fr}
  .hero h1{font-size:25px}
  .brand-text{font-size:14.5px}
  table.spec{font-size:13px}
  table.spec thead th,table.spec tbody td{padding:11px 12px}
  .cta-actions .btn{width:100%}
}

/* roulang page: category3 */
:root{
 --brand:#3b5bfd;
 --brand-2:#16b8cf;
 --brand-deep:#0b1a2b;
 --ink:#0f2438;
 --ink-2:#22394f;
 --muted:#5f7791;
 --bg:#f5f8fc;
 --surface:#ffffff;
 --line:#e2e9f3;
 --line-strong:#cdd9ea;
 --gold:#eda233;
 --grad:linear-gradient(135deg,#3b5bfd 0%,#16b8cf 100%);
 --grad-soft:linear-gradient(135deg,rgba(59,91,253,.10),rgba(22,184,207,.12));
 --radius-lg:22px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 2px 10px rgba(15,42,74,.06);
 --shadow:0 12px 30px rgba(15,42,74,.09);
 --shadow-lg:0 24px 52px rgba(15,42,74,.16);
 --container:1180px;
 --ease:.22s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;line-height:1.75;color:var(--ink);background:var(--surface);
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ Header ============ */
.site-header{
 position:sticky;top:0;z-index:100;
 background:rgba(255,255,255,.92);
 backdrop-filter:saturate(180%) 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 rgba(15,42,74,.10)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;position:relative}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
 width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
 background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(59,91,253,.32);
}
.brand-mark svg{width:21px;height:21px}
.brand-text{font-size:16px;font-weight:800;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
 padding:8px 14px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--ink-2);
 transition:background var(--ease),color var(--ease);white-space:nowrap;
}
.nav-link:hover{background:rgba(59,91,253,.08);color:var(--brand)}
.nav-link.is-active{color:var(--brand);background:rgba(59,91,253,.11)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:7px;
 padding:11px 20px;border-radius:9px;font-size:14.5px;font-weight:700;
 transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
 white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 22px rgba(59,91,253,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(59,91,253,.36);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(59,91,253,.3)}
.btn-ghost{background:transparent;border:1px solid var(--line-strong);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:8px}
.btn-light{background:#fff;color:var(--brand);box-shadow:var(--shadow-sm)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow);color:var(--brand)}
.btn:focus-visible,.nav-link:focus-visible,.nav-toggle:focus-visible,input:focus-visible{
 outline:3px solid rgba(59,91,253,.45);outline-offset:2px;
}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
 align-items:center;justify-content:center;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{
 content:'';position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ Hero ============ */
.hero-ver{
 position:relative;overflow:hidden;color:#fff;padding:62px 0 70px;
 background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.hero-ver::before{
 content:'';position:absolute;inset:0;
 background:linear-gradient(152deg,rgba(6,18,35,.95) 0%,rgba(11,26,43,.92) 44%,rgba(23,80,120,.84) 100%);
}
.hero-ver::after{
 content:'';position:absolute;left:-160px;bottom:-180px;width:480px;height:480px;border-radius:50%;
 background:radial-gradient(circle,rgba(59,91,253,.34),transparent 68%);pointer-events:none;
}
.hero-grid{
 position:relative;z-index:2;display:grid;grid-template-columns:1.25fr .85fr;gap:44px;align-items:center;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(219,234,254,.72);margin-bottom:16px}
.crumb a{color:rgba(219,234,254,.9)}
.crumb a:hover{color:#7af0dd}
.crumb span{opacity:.55}
.hero-badge{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:600;letter-spacing:.02em;
 background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);color:#dbeafe;
}
.hero-badge::before{content:'';width:7px;height:7px;border-radius:50%;background:#37e0c8;box-shadow:0 0 0 4px rgba(55,224,200,.22)}
.hero-ver h1{
 margin:18px 0 0;font-size:clamp(27px,3.6vw,40px);line-height:1.26;letter-spacing:-.02em;
 text-shadow:0 4px 22px rgba(0,0,0,.3);
}
.hero-ver h1 strong{color:#6ff0da;font-weight:800}
.hero-lead{margin-top:16px;max-width:620px;font-size:15px;line-height:1.85;color:rgba(229,240,252,.9)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tag{
 display:inline-flex;align-items:center;padding:6px 13px;border-radius:999px;
 font-size:12.5px;font-weight:600;color:#cfe0f7;
 background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);
}
.flash-strip{
 margin-top:26px;display:flex;flex-wrap:wrap;align-items:center;gap:16px;
 padding:14px 18px;border-radius:16px;
 background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.26);
 backdrop-filter:blur(10px);box-shadow:0 18px 40px rgba(0,0,0,.22);
}
.flash-label{
 display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:#a7f3e4;
}
.flash-label::before{content:'';width:8px;height:8px;border-radius:50%;background:#fa6f6f;box-shadow:0 0 0 4px rgba(250,111,111,.2)}
.countdown{display:flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums}
.cd-unit{
 min-width:44px;padding:5px 6px;text-align:center;border-radius:9px;
 background:rgba(8,20,36,.55);border:1px solid rgba(255,255,255,.18);
}
.cd-unit b{display:block;font-size:16px;font-weight:800;line-height:1.2;color:#fff}
.cd-unit i{display:block;font-style:normal;font-size:10px;color:rgba(203,224,247,.7);letter-spacing:.04em}
.flash-strip .btn{margin-left:auto}

/* 主推版本卡 */
.hero-card{
 background:rgba(255,255,255,.96);border-radius:var(--radius-lg);padding:14px;
 box-shadow:var(--shadow-lg);color:var(--ink);border:1px solid rgba(255,255,255,.6);
}
.hero-card img{width:100%;height:170px;object-fit:cover;border-radius:16px}
.hero-card-body{padding:16px 8px 6px}
.hero-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.badge{
 display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;
 font-size:12px;font-weight:700;color:var(--brand);background:rgba(59,91,253,.1);
}
.badge-gold{color:#9a6209;background:rgba(237,162,51,.16)}
.hero-card h2{font-size:17.5px;font-weight:800;line-height:1.45}
.hero-card p{margin-top:8px;font-size:13.5px;line-height:1.75;color:var(--muted)}
.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}
.mini-stats div{
 text-align:center;padding:9px 4px;border-radius:10px;background:var(--bg);border:1px solid var(--line);
}
.mini-stats b{display:block;font-size:15px;font-weight:800;color:var(--ink)}
.mini-stats span{display:block;font-size:11.5px;color:var(--muted)}

/* ============ Section 基础 ============ */
.section{padding:72px 0}
.section-alt{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:38px}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:800;color:var(--brand);
 letter-spacing:.06em;margin-bottom:10px;
}
.eyebrow::before{content:'';width:22px;height:3px;border-radius:2px;background:var(--grad)}
.section-title{font-size:clamp(22px,2.6vw,29px);line-height:1.34;font-weight:800;letter-spacing:-.01em}
.section-desc{margin-top:12px;font-size:15px;line-height:1.8;color:var(--muted)}

/* 数据看板 */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:24px 22px;box-shadow:var(--shadow-sm);position:relative;overflow:hidden;
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.stat-card::after{
 content:'';position:absolute;right:-28px;top:-28px;width:96px;height:96px;border-radius:50%;
 background:var(--grad-soft);
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.stat-num{font-size:34px;font-weight:800;line-height:1.1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;position:relative;z-index:1}
.stat-num small{font-size:15px;font-weight:700;margin-left:2px}
.stat-label{margin-top:8px;font-size:14px;font-weight:700;color:var(--ink-2)}
.stat-note{margin-top:4px;font-size:12.5px;color:var(--muted)}

/* 版本矩阵 */
.matrix-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.ver-card{
 display:grid;grid-template-columns:180px 1fr;gap:0;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 overflow:hidden;box-shadow:var(--shadow-sm);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.ver-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.ver-thumb{height:100%;min-height:180px;object-fit:cover;border-radius:0}
.ver-body{padding:22px}
.ver-body h3{font-size:17px;font-weight:800;margin-top:10px}
.ver-body p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--muted)}
.ver-list{margin-top:14px;display:flex;flex-wrap:wrap;gap:7px}
.ver-list span{
 font-size:12px;font-weight:600;padding:4px 10px;border-radius:7px;
 background:var(--bg);color:var(--ink-2);border:1px solid var(--line);
}

/* 对比 */
.compare{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 overflow:hidden;box-shadow:var(--shadow);
}
.compare-head,.compare-row{
 display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:14px;align-items:center;
 padding:16px 24px;
}
.compare-head{
 background:var(--grad);color:#fff;font-size:14px;font-weight:800;letter-spacing:.02em;
}
.compare-row{border-top:1px solid var(--line);font-size:14.5px;transition:background var(--ease)}
.compare-row:nth-child(odd){background:#fbfdff}
.compare-row:hover{background:rgba(59,91,253,.05)}
.cmp-label{font-weight:700;color:var(--ink-2)}
.cmp-old{color:var(--muted)}
.cmp-new{font-weight:800;color:var(--brand)}
.cmp-note{
 display:flex;align-items:flex-start;gap:10px;margin-top:18px;padding:16px 20px;
 border-radius:var(--radius);background:var(--grad-soft);border:1px solid rgba(59,91,253,.16);
 font-size:14px;line-height:1.75;color:var(--ink-2);
}
.cmp-note b{color:var(--brand)}

/* 里程碑 */
.timeline{display:grid;gap:16px}
.tl-item{display:grid;grid-template-columns:132px 1fr;gap:20px;align-items:start}
.tl-tag{
 font-size:14px;font-weight:800;color:var(--brand);padding-top:16px;
 position:relative;padding-left:18px;
}
.tl-tag::before{
 content:'';position:absolute;left:0;top:23px;width:9px;height:9px;border-radius:50%;
 background:var(--grad);box-shadow:0 0 0 4px rgba(59,91,253,.14);
}
.tl-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:18px 22px;box-shadow:var(--shadow-sm);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.tl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.tl-card h3{font-size:15.5px;font-weight:800}
.tl-card p{margin-top:6px;font-size:14px;line-height:1.75;color:var(--muted)}

/* 保障 */
.assure-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.assure-item{
 display:flex;gap:16px;padding:22px;border-radius:var(--radius);
 background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.assure-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.assure-icon{
 flex:0 0 auto;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
 background:var(--grad-soft);color:var(--brand);
}
.assure-icon svg{width:22px;height:22px}
.assure-item h3{font-size:15.5px;font-weight:800}
.assure-item p{margin-top:6px;font-size:14px;line-height:1.75;color:var(--muted)}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:rgba(59,91,253,.34);box-shadow:var(--shadow)}
.faq-item summary{
 list-style:none;cursor:pointer;padding:18px 56px 18px 22px;position:relative;
 font-size:15.5px;font-weight:700;color:var(--ink);transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:'';position:absolute;right:24px;top:50%;width:10px;height:10px;
 border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
 transform:translateY(-70%) rotate(45deg);transition:transform var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-item summary:hover{color:var(--brand)}
.faq-item p{padding:0 22px 20px;font-size:14.5px;line-height:1.8;color:var(--muted)}

/* CTA */
.cta-panel{
 position:relative;overflow:hidden;border-radius:var(--radius-lg);
 padding:48px 44px;color:#fff;
 background:url('/assets/images/backpic/back-4.webp') center/cover no-repeat;
 box-shadow:var(--shadow-lg);
}
.cta-panel::before{
 content:'';position:absolute;inset:0;
 background:linear-gradient(130deg,rgba(9,23,40,.95),rgba(15,54,92,.86) 55%,rgba(26,110,140,.8));
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.cta-inner h2{font-size:clamp(21px,2.4vw,28px);font-weight:800;line-height:1.36}
.cta-inner p{margin-top:12px;font-size:14.5px;line-height:1.8;color:rgba(226,238,252,.88)}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap}
.subscribe-form input{
 flex:1;min-width:180px;padding:13px 16px;border-radius:10px;border:1px solid rgba(255,255,255,.32);
 background:rgba(255,255,255,.14);color:#fff;outline:none;transition:border-color var(--ease),background var(--ease);
}
.subscribe-form input::placeholder{color:rgba(226,238,252,.62)}
.subscribe-form input:focus{border-color:#7af0dd;background:rgba(255,255,255,.2)}
.subscribe-form .btn-primary{background:#fff;color:#1b3fa8;box-shadow:0 10px 24px rgba(0,0,0,.24)}
.subscribe-form .btn-primary:hover{background:#eef4ff;color:#1b3fa8}
.form-hint{margin-top:12px;font-size:12.5px;color:rgba(226,238,252,.66)}
.form-msg{margin-top:12px;font-size:13.5px;font-weight:700;color:#7af0dd;min-height:20px}

/* ============ Footer ============ */
.site-footer{background:var(--brand-deep);color:#c6d6e8;padding:56px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:38px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:800;margin-bottom:14px}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px}
.site-footer p{font-size:13.8px;line-height:1.85;color:#9db4cd}
.footer-title{font-size:14px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-links{display:grid;gap:9px}
.footer-links a{font-size:13.8px;color:#9db4cd;transition:color var(--ease),transform var(--ease)}
.footer-links a:hover{color:#7af0dd}
.footer-bottom{
 margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
 display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
}
.footer-bottom p{font-size:13px;color:#8199b3}
.footer-bottom .domain{font-size:12.5px;color:#6f879f;letter-spacing:.02em}

/* ============ 响应式 ============ */
@media (max-width:1024px){
 .hero-grid{grid-template-columns:1fr;gap:32px}
 .stats-grid{grid-template-columns:repeat(2,1fr)}
 .matrix-grid{grid-template-columns:1fr}
 .cta-inner{grid-template-columns:1fr;gap:26px}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
 .nav-toggle{display:inline-flex}
 .main-nav{
  position:absolute;top:64px;left:0;right:0;margin-left:0;
  flex-direction:column;align-items:stretch;gap:2px;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 16px 30px rgba(15,42,74,.12);
  padding:12px 18px 18px;display:none;
 }
 .main-nav.is-open{display:flex}
 .nav-link{padding:12px 14px;font-size:15px}
}
@media (max-width:768px){
 .section{padding:56px 0}
 .hero-ver{padding:48px 0 56px}
 .ver-card{grid-template-columns:1fr}
 .ver-thumb{min-height:160px;height:170px}
 .compare-head,.compare-row{grid-template-columns:1fr 1fr;gap:8px;padding:14px 18px}
 .compare-head span:first-child,.compare-row .cmp-label{grid-column:1 / -1;font-size:13px}
 .compare-head span:first-child{visibility:hidden;height:0;padding:0}
 .cmp-label{color:var(--brand);font-size:13px;letter-spacing:.02em}
 .assure-grid{grid-template-columns:1fr}
 .tl-item{grid-template-columns:1fr;gap:8px}
 .tl-tag{padding-top:0}
 .tl-tag::before{top:8px}
 .cta-panel{padding:34px 24px}
 .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:520px){
 .container{padding:0 18px}
 .stats-grid{grid-template-columns:1fr}
 .header-actions .btn{display:none}
 .flash-strip{flex-direction:column;align-items:flex-start}
 .flash-strip .btn{margin-left:0;width:100%}
 .hero-card img{height:150px}
 .footer-bottom{flex-direction:column}
 .subscribe-form .btn-primary{width:100%}
}