/* roulang page: index */
:root{
  --ink:#0d1a24;
  --ink-2:#162c3a;
  --ink-3:#1f3b4c;
  --gold:#c9a24a;
  --gold-lt:#e8cd90;
  --gold-dp:#a8842f;
  --bg:#f4f6f8;
  --card:#ffffff;
  --text:#1c2a35;
  --muted:#5f6f7d;
  --line:#e1e6ec;
  --green:#1f7a5c;
  --red:#b8443c;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 12px 32px rgba(13,26,36,.08);
  --shadow-lg:0 22px 50px rgba(13,26,36,.14);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
img{max-width:100%;height:auto;display:block;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px;}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.07);
  box-shadow:0 6px 20px rgba(13,26,36,.18);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px;}
.brand{display:flex;align-items:center;gap:11px;min-width:0;}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  background:linear-gradient(135deg,var(--gold),var(--gold-lt));
  color:#0d1a24;font-weight:800;font-size:17px;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:0;
}
.brand-name{color:#fff;font-size:16px;font-weight:700;line-height:1.3;white-space:nowrap;}
.brand-sub{color:#8fa4b4;font-size:12px;line-height:1.4;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  display:inline-block;padding:9px 14px;border-radius:9px;
  color:#c6d2dc;font-size:15px;transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.08);}
.nav-links a.is-active{color:var(--gold-lt);background:rgba(201,162,74,.14);font-weight:600;}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--gold),var(--gold-lt));
  color:#0d1a24 !important;font-weight:700;font-size:15px;
  padding:10px 18px;border-radius:10px;
  box-shadow:0 8px 18px rgba(201,162,74,.28);
  transition:transform .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(201,162,74,.36);}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);
  color:#fff;font-size:18px;cursor:pointer;align-items:center;justify-content:center;
}
.mobile-panel{display:none;border-top:1px solid rgba(255,255,255,.08);padding:10px 0 16px;}
.mobile-panel a{
  display:block;padding:12px 4px;color:#c6d2dc;font-size:15px;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-panel a:last-child{border-bottom:0;}
.mobile-panel.is-open{display:block;}

/* hero */
.hero{
  position:relative;overflow:hidden;color:#eaf1f6;
  background:radial-gradient(1100px 460px at 82% -12%,rgba(201,162,74,.22),transparent 62%),
             radial-gradient(760px 420px at 4% 108%,rgba(31,59,76,.85),transparent 68%),
             linear-gradient(160deg,#0d1a24 0%,#132736 58%,#0f2130 100%);
  padding:64px 0 72px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 88%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 88%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:48px;align-items:start;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(201,162,74,.16);border:1px solid rgba(201,162,74,.42);
  color:var(--gold-lt);font-size:13px;font-weight:600;
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--gold);display:inline-block;}
.hero h1{
  font-size:38px;line-height:1.32;font-weight:800;color:#fff;
  letter-spacing:-.4px;margin-bottom:18px;
}
.hero h1 .hl{color:var(--gold-lt);}
.hero-lead{font-size:16px;line-height:1.9;color:#a9bdcb;max-width:640px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:11px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease;
}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-lt));color:#0d1a24;box-shadow:0 12px 26px rgba(201,162,74,.32);}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(201,162,74,.42);}
.btn-ghost{background:rgba(255,255,255,.06);color:#e9f1f6;border-color:rgba(255,255,255,.22);}
.btn-ghost:hover{background:rgba(255,255,255,.13);transform:translateY(-2px);}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:30px;font-size:13.5px;color:#93a9b8;}
.hero-points li{display:flex;align-items:center;gap:7px;}
.hero-points li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--gold);display:inline-block;}

/* hero card */
.hero-card{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  border-radius:18px;padding:22px;
  backdrop-filter:blur(6px);
  box-shadow:var(--shadow-lg);
}
.hero-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.hero-card-head h2{font-size:16px;color:#fff;font-weight:700;}
.hero-card-head span{font-size:12px;color:var(--gold-lt);background:rgba(201,162,74,.16);border:1px solid rgba(201,162,74,.35);padding:3px 9px;border-radius:6px;}
.speed-list{display:grid;gap:10px;}
.speed-item{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:12px;align-items:center;
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);
  border-radius:11px;padding:11px 13px;
}
.speed-item b{color:var(--gold-lt);font-size:14px;font-weight:700;}
.speed-item p{font-size:13px;color:#9fb4c2;line-height:1.65;}
.speed-note{margin-top:14px;font-size:12px;color:#7f95a5;line-height:1.7;}

/* generic section */
.section{padding:66px 0;}
.section-alt{background:#fff;}
.section-dark{background:linear-gradient(160deg,#0d1a24,#183040);color:#dbe6ee;}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.5px;
  color:var(--gold-dp);background:rgba(201,162,74,.14);
  border:1px solid rgba(201,162,74,.32);
  padding:5px 12px;border-radius:6px;margin-bottom:14px;
}
.section-dark .sec-tag{color:var(--gold-lt);background:rgba(201,162,74,.18);border-color:rgba(201,162,74,.36);}
.sec-head h2{font-size:28px;line-height:1.4;font-weight:800;color:var(--ink);letter-spacing:-.2px;}
.section-dark .sec-head h2{color:#fff;}
.sec-head p{margin-top:12px;font-size:15px;line-height:1.85;color:var(--muted);}
.section-dark .sec-head p{color:#a6bccb;}

/* download */
.dl-band{
  background:linear-gradient(135deg,#132c3c 0%,#0f2330 52%,#1b3a2e 100%);
  color:#e6eff5;position:relative;overflow:hidden;
}
.dl-band::before{
  content:"";position:absolute;right:-120px;top:-90px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,162,74,.28),transparent 66%);
}
.dl-inner{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:40px;align-items:center;}
.dl-band h2{font-size:26px;font-weight:800;color:#fff;line-height:1.45;}
.dl-band p{margin-top:12px;font-size:15px;line-height:1.85;color:#a8bfcd;max-width:520px;}
.dl-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;}
.dl-btn{
  display:flex;flex-direction:column;align-items:flex-start;gap:4px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  border-radius:13px;padding:16px 16px;color:#eaf3f8;
  transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease;
  min-width:0;
}
.dl-btn:hover{transform:translateY(-3px);background:rgba(255,255,255,.12);border-color:rgba(201,162,74,.55);box-shadow:0 16px 30px rgba(0,0,0,.24);}
.dl-btn .dl-ico{font-size:18px;color:var(--gold-lt);line-height:1;}
.dl-btn .dl-name{font-size:15px;font-weight:700;}
.dl-btn .dl-tip{font-size:12px;color:#93aab9;}
.dl-note{margin-top:16px;font-size:12.5px;color:#8fa6b5;line-height:1.7;}

/* category entry board */
.entry-board{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:24px;}
.entry-main{
  background:linear-gradient(150deg,#12293a,#1b3d4f);
  border-radius:var(--radius);padding:32px;color:#e6f0f6;position:relative;overflow:hidden;
  border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow);
}
.entry-main::after{
  content:"";position:absolute;right:-60px;bottom:-70px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,162,74,.28),transparent 68%);
}
.entry-main h3{font-size:21px;font-weight:800;color:#fff;margin-bottom:12px;}
.entry-main p{font-size:14.5px;line-height:1.85;color:#a9c0ce;max-width:520px;}
.entry-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;position:relative;z-index:2;}
.entry-link{
  display:inline-flex;align-items:center;gap:7px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);
  border-radius:9px;padding:9px 16px;font-size:14px;color:#e8f2f8;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.entry-link:hover{background:rgba(201,162,74,.2);border-color:rgba(201,162,74,.5);transform:translateY(-2px);}
.entry-link.is-primary{background:linear-gradient(135deg,var(--gold),var(--gold-lt));color:#0d1a24;font-weight:700;border-color:transparent;}
.entry-link.is-primary:hover{background:linear-gradient(135deg,var(--gold-lt),var(--gold));}
.entry-side{display:grid;gap:14px;}
.entry-mini{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:18px 20px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease;
}
.entry-mini:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.entry-mini h4{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.entry-mini p{font-size:13.5px;color:var(--muted);line-height:1.75;}

/* feature grid */
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow);min-width:0;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(201,162,74,.45);}
.feature-ico{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(201,162,74,.15);color:var(--gold-dp);font-size:19px;font-weight:800;margin-bottom:16px;
}
.feature-card h3{font-size:16.5px;font-weight:700;color:var(--ink);margin-bottom:9px;}
.feature-card p{font-size:13.8px;line-height:1.8;color:var(--muted);}

/* calculator demo */
.demo-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:26px;align-items:stretch;}
.demo-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);min-width:0;
}
.demo-panel h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.demo-panel .sub{font-size:13px;color:var(--muted);margin-bottom:20px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.field input[type="range"]{width:100%;accent-color:var(--gold-dp);}
.field .val{
  display:inline-block;font-size:14px;font-weight:700;color:var(--gold-dp);
  background:rgba(201,162,74,.13);border-radius:6px;padding:2px 10px;margin-left:8px;
}
.demo-result{background:linear-gradient(150deg,#12293a,#1c3b4f);color:#e7f1f7;border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-lg);}
.demo-result h3{font-size:16px;color:#fff;margin-bottom:16px;}
.res-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.14);
}
.res-row:last-of-type{border-bottom:0;}
.res-row span{font-size:13.5px;color:#a2b9c7;}
.res-row b{font-size:19px;color:var(--gold-lt);font-weight:800;letter-spacing:.3px;}
.demo-result .tip{margin-top:16px;font-size:12.5px;line-height:1.7;color:#8ba3b2;}

/* scene matrix */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.scene-card{
  display:grid;grid-template-columns:52px minmax(0,1fr);gap:16px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);min-width:0;
  transition:transform .2s ease,box-shadow .2s ease;
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.scene-num{
  width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#12293a,#1f4256);color:var(--gold-lt);font-weight:800;font-size:16px;
}
.scene-card h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:7px;}
.scene-card p{font-size:13.8px;line-height:1.8;color:var(--muted);}

/* steps */
.step-track{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;counter-reset:step;}
.step-card{
  position:relative;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius);padding:26px 22px;min-width:0;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.step-card:hover{background:rgba(255,255,255,.09);border-color:rgba(201,162,74,.45);transform:translateY(-3px);}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;font-weight:800;font-size:15px;
  background:linear-gradient(135deg,var(--gold),var(--gold-lt));color:#0d1a24;margin-bottom:16px;
}
.step-card h3{font-size:16.5px;font-weight:700;color:#fff;margin-bottom:8px;}
.step-card p{font-size:13.8px;line-height:1.8;color:#a4bbca;}

/* table */
.param-table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
.param-table th,.param-table td{padding:15px 18px;text-align:left;font-size:14px;border-bottom:1px solid var(--line);vertical-align:top;}
.param-table th{background:#f0f3f6;color:var(--ink);font-weight:700;font-size:13.5px;white-space:nowrap;}
.param-table tr:last-child td{border-bottom:0;}
.param-table td b{color:var(--gold-dp);}
.table-note{margin-top:14px;font-size:13px;color:var(--muted);line-height:1.8;}

/* risk */
.risk-box{
  background:#fff8ef;border:1px solid #f0d9b6;border-left:5px solid var(--gold);
  border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow);
}
.risk-box h3{font-size:17px;font-weight:800;color:#7a5416;margin-bottom:12px;}
.risk-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 26px;}
.risk-list li{font-size:14px;line-height:1.8;color:#6d5732;padding-left:16px;position:relative;}
.risk-list li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--gold-dp);}

/* news */
.news-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:26px;align-items:start;}
.news-list{display:grid;gap:14px;}
.news-item{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:20px 22px;box-shadow:var(--shadow);min-width:0;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-item:hover{transform:translateX(4px);box-shadow:var(--shadow-lg);border-color:rgba(201,162,74,.45);}
.news-item h3{font-size:16px;font-weight:700;color:var(--ink);line-height:1.55;margin-bottom:8px;}
.news-item p{font-size:13.8px;line-height:1.8;color:var(--muted);margin-bottom:12px;}
.news-meta{display:flex;flex-wrap:wrap;gap:8px;font-size:12.5px;color:#8194a2;}
.news-meta span{background:#f0f3f6;border-radius:6px;padding:3px 10px;}
.news-side{display:grid;gap:14px;}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px;box-shadow:var(--shadow);}
.side-card h3{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.side-link{display:flex;gap:10px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:13.8px;color:#2f4152;line-height:1.6;transition:color .2s ease;}
.side-link:last-child{border-bottom:0;}
.side-link:hover{color:var(--gold-dp);}
.side-link i{flex:0 0 6px;width:6px;height:6px;border-radius:50%;background:var(--gold);margin-top:9px;}
.more-link{
  display:inline-flex;align-items:center;gap:7px;margin-top:20px;
  font-size:14px;font-weight:700;color:var(--gold-dp);
  border:1px solid rgba(201,162,74,.45);background:rgba(201,162,74,.1);
  padding:10px 18px;border-radius:9px;
  transition:background .2s ease,transform .2s ease;
}
.more-link:hover{background:rgba(201,162,74,.2);transform:translateY(-2px);}
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius-sm);
  padding:28px;text-align:center;color:var(--muted);font-size:14px;
}

/* topics */
.topic-cloud{display:flex;flex-wrap:wrap;gap:11px;}
.topic-chip{
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:9px 18px;font-size:13.8px;color:#31485a;
  transition:border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.topic-chip:hover{border-color:rgba(201,162,74,.55);color:var(--gold-dp);transform:translateY(-2px);box-shadow:0 8px 18px rgba(13,26,36,.08);}

/* glossary */
.glossary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
.glossary-card{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--gold);
  border-radius:var(--radius-sm);padding:20px;box-shadow:var(--shadow);min-width:0;
}
.glossary-card h3{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:8px;}
.glossary-card p{font-size:13.6px;line-height:1.8;color:var(--muted);}

/* faq */
.faq-list{display:grid;gap:13px;max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:20px 22px;box-shadow:var(--shadow);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(201,162,74,.45);box-shadow:var(--shadow-lg);}
.faq-item h3{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:9px;line-height:1.6;}
.faq-item p{font-size:14px;line-height:1.85;color:var(--muted);}

/* final cta */
.final-cta{
  background:linear-gradient(135deg,#0d1a24 0%,#173349 55%,#123a2f 100%);
  color:#eaf2f7;text-align:center;padding:66px 0;position:relative;overflow:hidden;
}
.final-cta::before{
  content:"";position:absolute;left:50%;top:-140px;transform:translateX(-50%);
  width:620px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,162,74,.25),transparent 66%);
}
.final-cta .inner{position:relative;z-index:2;max-width:760px;margin:0 auto;}
.final-cta h2{font-size:27px;font-weight:800;color:#fff;line-height:1.45;}
.final-cta p{margin-top:14px;font-size:15px;line-height:1.9;color:#a9c0ce;}
.final-cta .btn-row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px;}

/* footer */
.site-footer{background:#0b1720;color:#8fa4b3;padding:54px 0 26px;}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,.72fr));gap:32px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:13.6px;line-height:1.9;color:#7e94a4;max-width:360px;}
.footer-col h4{font-size:14.5px;color:#e2ecf3;font-weight:700;margin-bottom:14px;}
.footer-col a,.footer-col span{display:block;font-size:13.6px;color:#8ba0af;padding:5px 0;transition:color .2s ease;}
.footer-col a:hover{color:var(--gold-lt);}
.footer-bottom{
  margin-top:38px;padding-top:22px;border-top:1px solid rgba(255,255,255,.09);
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  font-size:12.8px;color:#6f8492;line-height:1.7;
}

/* floating bar */
.float-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:55;
  background:rgba(13,26,36,.96);border-top:1px solid rgba(201,162,74,.35);
  padding:10px 16px;display:none;
  backdrop-filter:blur(6px);
}
.float-bar .fb-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;max-width:1180px;margin:0 auto;}
.float-bar .fb-text{font-size:13px;color:#c3d3de;line-height:1.5;}
.float-bar .fb-text b{color:var(--gold-lt);}
.float-bar .btn{padding:9px 16px;font-size:13.5px;border-radius:9px;}

/* responsive */
@media (max-width:1024px){
  .hero{padding:52px 0 58px;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:34px;}
  .hero h1{font-size:32px;}
  .dl-inner{grid-template-columns:minmax(0,1fr);gap:26px;}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .entry-board{grid-template-columns:minmax(0,1fr);}
  .demo-grid{grid-template-columns:minmax(0,1fr);}
  .news-layout{grid-template-columns:minmax(0,1fr);}
  .glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}
  .step-track{grid-template-columns:minmax(0,1fr);}
  .float-bar{display:block;}
  body{padding-bottom:64px;}
}
@media (max-width:820px){
  .nav-links{display:none;}
  .menu-toggle{display:flex;}
  .scene-grid{grid-template-columns:minmax(0,1fr);}
  .risk-list{grid-template-columns:minmax(0,1fr);}
  .section{padding:52px 0;}
  .sec-head h2{font-size:24px;}
}
@media (max-width:560px){
  .wrap{padding:0 16px;}
  .hero h1{font-size:25px;line-height:1.4;}
  .hero-lead{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .dl-buttons{grid-template-columns:minmax(0,1fr);}
  .feature-grid{grid-template-columns:minmax(0,1fr);}
  .glossary-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .param-table th,.param-table td{padding:12px 12px;font-size:13px;}
  .sec-head h2{font-size:21px;}
  .brand-name{font-size:15px;}
  .brand-sub{display:none;}
  .final-cta h2{font-size:21px;}
  .demo-panel,.demo-result{padding:20px;}
}

/* roulang page: article */
:root{
  --ink:#0d1a24;
  --ink-2:#162c3a;
  --ink-3:#1f3b4c;
  --gold:#c9a24a;
  --gold-lt:#e8cd90;
  --gold-dp:#a8842f;
  --bg:#f4f6f8;
  --card:#ffffff;
  --text:#1c2a35;
  --muted:#5f6f7d;
  --line:#e1e6ec;
  --green:#1f7a5c;
  --red:#b8443c;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 12px 32px rgba(13,26,36,.08);
  --shadow-lg:0 22px 50px rgba(13,26,36,.14);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.07);
  box-shadow:0 6px 20px rgba(13,26,36,.18);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px;}
.brand{display:flex;align-items:center;gap:11px;min-width:0;}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  background:linear-gradient(135deg,var(--gold),var(--gold-lt));
  color:#0d1a24;font-weight:800;font-size:17px;
  display:flex;align-items:center;justify-content:center;
}
.brand-name{color:#fff;font-size:16px;font-weight:700;line-height:1.3;white-space:nowrap;}
.brand-sub{color:#8fa4b4;font-size:12px;line-height:1.4;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  display:inline-block;padding:9px 14px;border-radius:9px;
  color:#c6d2dc;font-size:15px;transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.08);}
.nav-links a.is-active{color:var(--gold-lt);background:rgba(201,162,74,.14);font-weight:600;}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--gold),var(--gold-lt));
  color:#0d1a24 !important;font-weight:700;font-size:15px;
  padding:10px 18px;border-radius:10px;
  box-shadow:0 8px 18px rgba(201,162,74,.28);
  transition:transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(201,162,74,.36);}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);
  color:#fff;font-size:18px;cursor:pointer;align-items:center;justify-content:center;
}
.mobile-panel{display:none;border-top:1px solid rgba(255,255,255,.08);padding:10px 0 16px;}
.mobile-panel a{
  display:block;padding:12px 4px;color:#c6d2dc;font-size:15px;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-panel a:last-child{border-bottom:0;}
.mobile-panel.is-open{display:block;}

/* page head */
.page-head{
  position:relative;
  background:radial-gradient(900px 380px at 86% -20%,rgba(201,162,74,.20),transparent 62%),
             linear-gradient(160deg,#0d1a24 0%,#132736 62%,#0f2130 100%);
  color:#eaf1f6;padding:34px 0 46px;overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.65),transparent 90%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.65),transparent 90%);
}
.crumb{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#93a9b8;margin-bottom:18px;}
.crumb a{color:#a9bdcb;}
.crumb a:hover{color:var(--gold-lt);}
.crumb span.sep{color:#4d6374;}
.art-tagline{
  position:relative;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(201,162,74,.16);border:1px solid rgba(201,162,74,.42);
  color:var(--gold-lt);font-size:12.5px;font-weight:600;
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
.art-tagline .dot{width:7px;height:7px;border-radius:50%;background:var(--gold);display:inline-block;}
.page-head h1{
  position:relative;z-index:2;
  font-size:32px;line-height:1.42;font-weight:800;color:#fff;letter-spacing:-.3px;
  max-width:900px;
}
.art-meta{
  position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:10px 22px;
  margin-top:18px;font-size:13.5px;color:#93a9b8;
}
.art-meta span{display:inline-flex;align-items:center;gap:7px;}
.art-meta span::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--gold);display:inline-block;}

/* layout */
.main-body{padding:48px 0 10px;}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:36px;align-items:start;}
.panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.article-shell{padding:34px 34px 38px;min-width:0;}
.article-shell .art-body{min-width:0;}

/* cms article prose */
.art-body{font-size:16.5px;line-height:1.95;color:#26343f;overflow-wrap:break-word;word-break:normal;}
.art-body h2{
  font-size:23px;line-height:1.5;color:var(--ink);font-weight:800;
  margin:34px 0 14px;padding-left:14px;border-left:4px solid var(--gold);
}
.art-body h3{font-size:18.5px;line-height:1.6;color:var(--ink-2);font-weight:700;margin:26px 0 10px;}
.art-body h4{font-size:16.5px;color:var(--ink-3);font-weight:700;margin:20px 0 8px;}
.art-body p{margin:0 0 16px;}
.art-body ul,.art-body ol{margin:0 0 18px;padding-left:0;}
.art-body ul li,.art-body ol li{
  position:relative;padding-left:20px;margin-bottom:9px;color:#33424e;
}
.art-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:6px;height:6px;border-radius:2px;background:var(--gold);
}
.art-body ol{counter-reset:olc;}
.art-body ol li{counter-increment:olc;padding-left:26px;}
.art-body ol li::before{
  content:counter(olc) ".";
  position:absolute;left:0;top:0;color:var(--gold-dp);font-weight:700;
}
.art-body blockquote{
  margin:20px 0;padding:16px 20px;background:#f8f5ec;
  border-left:4px solid var(--gold);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:#4a5a66;
}
.art-body a{color:var(--gold-dp);text-decoration:underline;text-underline-offset:3px;}
.art-body a:hover{color:var(--ink);}
.art-body strong{color:var(--ink);font-weight:700;}
.art-body img{border-radius:var(--radius-sm);margin:20px auto;}
.art-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px;}
.art-body th,.art-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.art-body th{background:#f2f5f8;color:var(--ink-2);font-weight:700;}
.art-body hr{border:0;border-top:1px solid var(--line);margin:26px 0;}

/* not found */
.notfound{padding:52px 8px;text-align:center;}
.notfound h2{font-size:22px;color:var(--ink);margin-bottom:10px;}
.notfound p{color:var(--muted);margin-bottom:22px;}

/* sidebar */
.side{display:grid;gap:20px;min-width:0;}
.side-card{padding:22px 22px 24px;min-width:0;}
.side-card h3{
  font-size:15.5px;color:var(--ink);font-weight:800;margin-bottom:14px;
  padding-bottom:10px;border-bottom:1px solid var(--line);
}
.info-row{display:flex;justify-content:space-between;gap:14px;font-size:14px;padding:8px 0;border-bottom:1px dashed #eef2f6;}
.info-row:last-child{border-bottom:0;}
.info-row dt{color:var(--muted);flex:0 0 auto;}
.info-row dd{color:var(--ink-2);font-weight:600;text-align:right;min-width:0;overflow-wrap:break-word;}
.dl-mini{display:grid;gap:9px;}
.dl-mini a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-radius:10px;font-size:14px;font-weight:700;
  background:#f4f6f8;border:1px solid var(--line);color:var(--ink-2);
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.dl-mini a:hover{background:#eef2f6;border-color:#cfd8e0;transform:translateY(-1px);}
.dl-mini a em{font-style:normal;color:var(--gold-dp);font-size:12.5px;font-weight:700;}
.side-links{display:grid;gap:4px;}
.side-links a{
  display:block;padding:9px 10px;border-radius:9px;font-size:14px;color:#3b4b58;
  border-left:3px solid transparent;transition:all .2s ease;
}
.side-links a:hover{background:#f4f7f9;border-left-color:var(--gold);color:var(--ink);}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:11px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease;
}
.btn:focus-visible{outline:3px solid rgba(201,162,74,.5);outline-offset:2px;}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-lt));color:#0d1a24;box-shadow:0 12px 26px rgba(201,162,74,.32);}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(201,162,74,.42);}
.btn-ghost{background:rgba(255,255,255,.06);color:#e9f1f6;border-color:rgba(255,255,255,.22);}
.btn-ghost:hover{background:rgba(255,255,255,.13);transform:translateY(-2px);}
.btn-line{background:#fff;border-color:#cfd8e0;color:var(--ink-2);}
.btn-line:hover{border-color:var(--gold);color:var(--gold-dp);transform:translateY(-2px);}

/* sections */
.section{padding:62px 0;}
.section-alt{background:#fff;}
.section-dark{background:linear-gradient(160deg,#0d1a24,#183040);color:#dbe6ee;}
.sec-head{max-width:760px;margin-bottom:34px;}
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.6px;
  color:var(--gold-dp);background:rgba(201,162,74,.14);
  border:1px solid rgba(201,162,74,.34);
  padding:4px 12px;border-radius:999px;margin-bottom:14px;
}
.sec-head h2{font-size:28px;line-height:1.45;color:var(--ink);font-weight:800;letter-spacing:-.2px;}
.sec-head p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.9;}
.section-dark .sec-head h2{color:#fff;}
.section-dark .sec-head p{color:#a9bdcb;}

/* glossary */
.glossary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.glossary-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px 20px;min-width:0;box-shadow:0 6px 18px rgba(13,26,36,.05);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.glossary-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d6dee6;}
.glossary-card h3{font-size:16.5px;color:var(--ink);font-weight:800;margin-bottom:9px;}
.glossary-card p{font-size:14.5px;color:var(--muted);line-height:1.85;}

/* risk list */
.risk-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.risk-item{
  display:grid;grid-template-columns:44px minmax(0,1fr);gap:14px;min-width:0;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);padding:20px 20px;
}
.risk-num{
  width:44px;height:44px;border-radius:12px;flex:0 0 44px;
  background:linear-gradient(135deg,var(--gold),var(--gold-lt));color:#0d1a24;
  font-weight:800;font-size:16px;display:flex;align-items:center;justify-content:center;
}
.risk-item h3{font-size:16.5px;color:#fff;font-weight:700;margin-bottom:7px;}
.risk-item p{font-size:14.5px;color:#a9bdcb;line-height:1.85;}

/* cost */
.cost-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:28px;align-items:start;}
.cost-text h2{font-size:27px;color:var(--ink);font-weight:800;line-height:1.45;margin-bottom:14px;}
.cost-text p{color:var(--muted);font-size:15.5px;line-height:1.9;margin-bottom:14px;}
.formula{
  background:#0d1a24;color:#e8cd90;border-radius:var(--radius);
  padding:20px 22px;font-size:15.5px;line-height:1.9;letter-spacing:.2px;
  border:1px solid rgba(201,162,74,.3);overflow-wrap:break-word;
}
.cost-table{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
.cost-table th,.cost-table td{padding:13px 16px;border-bottom:1px solid var(--line);text-align:left;}
.cost-table th{background:#f2f5f8;color:var(--ink-2);font-weight:700;font-size:14px;}
.cost-table tr:last-child td{border-bottom:0;}
.cost-table td{color:#3b4b58;}

/* faq */
.faq-list{display:grid;gap:12px;max-width:920px;}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:rgba(201,162,74,.5);box-shadow:var(--shadow);}
.faq-item summary{
  cursor:pointer;padding:16px 20px;font-size:16px;font-weight:700;color:var(--ink);
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";color:var(--gold-dp);font-size:20px;font-weight:700;flex:0 0 auto;line-height:1;
}
.faq-item[open] summary::after{content:"–";}
.faq-item .faq-body{padding:0 20px 18px;color:var(--muted);font-size:15px;line-height:1.9;}

/* download */
.dl-band{
  background:radial-gradient(760px 320px at 88% 0%,rgba(201,162,74,.24),transparent 62%),
             linear-gradient(150deg,#0d1a24,#1a3244);
  border-radius:22px;padding:38px 34px;color:#e6eef4;
  box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.08);
}
.dl-band-head{max-width:660px;}
.dl-band-head h2{font-size:26px;color:#fff;font-weight:800;line-height:1.45;}
.dl-band-head p{margin-top:12px;color:#a9bdcb;font-size:15px;line-height:1.9;}
.dl-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:26px;}
.dl-btn{
  display:flex;flex-direction:column;gap:3px;align-items:flex-start;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  border-radius:12px;padding:15px 18px;min-width:0;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.dl-btn strong{font-size:15.5px;color:#fff;font-weight:700;}
.dl-btn span{font-size:12.5px;color:#9fb4c2;word-break:break-all;}
.dl-btn:hover{background:rgba(201,162,74,.18);border-color:rgba(201,162,74,.55);transform:translateY(-2px);}

/* cta strip */
.cta-strip{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 34px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:20px;box-shadow:var(--shadow);
}
.cta-strip h2{font-size:23px;color:var(--ink);font-weight:800;line-height:1.5;}
.cta-strip p{margin-top:8px;color:var(--muted);font-size:15px;max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* footer */
.site-footer{background:#0b1620;color:#93a9b8;padding:54px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:34px;}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:14px;line-height:1.9;color:#8ba0b0;max-width:420px;}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px;}
.footer-col a{display:block;font-size:14px;color:#8ba0b0;padding:5px 0;overflow-wrap:break-word;}
.footer-col a:hover{color:var(--gold-lt);}
.footer-bottom{
  margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.09);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:#71869a;
}

/* responsive */
@media (max-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr);gap:26px;}
  .side{grid-template-columns:repeat(2,minmax(0,1fr));}
  .glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cost-grid{grid-template-columns:minmax(0,1fr);}
  .page-head h1{font-size:28px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:900px){
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .menu-toggle{display:flex;}
  .risk-grid{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:768px){
  .section{padding:48px 0;}
  .article-shell{padding:24px 20px 28px;}
  .page-head{padding:26px 0 36px;}
  .page-head h1{font-size:24px;line-height:1.5;}
  .sec-head h2{font-size:23px;}
  .side{grid-template-columns:minmax(0,1fr);}
  .glossary-grid{grid-template-columns:minmax(0,1fr);}
  .dl-actions{grid-template-columns:minmax(0,1fr);}
  .dl-band{padding:28px 22px;border-radius:18px;}
  .cta-strip{padding:24px 22px;}
  .art-body{font-size:16px;}
  .art-body h2{font-size:20px;}
}
@media (max-width:520px){
  .wrap{padding:0 15px;}
  .brand-sub{display:none !important;}
  .brand-name{font-size:15px;}
  .page-head h1{font-size:21px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .cost-table th,.cost-table td{padding:10px 11px;font-size:13.5px;}
  .btn{width:100%;}
  .cta-actions{width:100%;}
  .hero-actions .btn, .dl-actions .dl-btn{width:100%;}
}

/* roulang page: category1 */
:root{
  --ink:#0d1a24;
  --ink-2:#162c3a;
  --ink-3:#1f3b4c;
  --gold:#c9a24a;
  --gold-lt:#e8cd90;
  --gold-dp:#a8842f;
  --bg:#f4f6f8;
  --card:#ffffff;
  --text:#1c2a35;
  --muted:#5f6f7d;
  --line:#e1e6ec;
  --green:#1f7a5c;
  --red:#b8443c;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 12px 32px rgba(13,26,36,.08);
  --shadow-lg:0 22px 50px rgba(13,26,36,.14);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
html body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease;}
img{max-width:100%;height:auto;display:block;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px;width:100%;}
/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.07);
  box-shadow:0 6px 20px rgba(13,26,36,.18);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px;}
.brand{display:flex;align-items:center;gap:11px;min-width:0;}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  background:linear-gradient(135deg,var(--gold),var(--gold-lt));
  color:#0d1a24;font-weight:800;font-size:17px;
  display:flex;align-items:center;justify-content:center;
}
.brand-name{color:#fff;font-size:16px;font-weight:700;line-height:1.3;white-space:nowrap;}
.brand-sub{color:#8fa4b4;font-size:12px;line-height:1.4;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  display:inline-block;padding:9px 14px;border-radius:9px;
  color:#c6d2dc;font-size:15px;transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.08);}
.nav-links a.is-active{color:var(--gold-lt);background:rgba(201,162,74,.14);font-weight:600;}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--gold),var(--gold-lt));
  color:#0d1a24 !important;font-weight:700;font-size:15px;
  padding:10px 18px;border-radius:10px;
  box-shadow:0 8px 18px rgba(201,162,74,.28);
  transition:transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(201,162,74,.36);}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);
  color:#fff;font-size:18px;cursor:pointer;align-items:center;justify-content:center;
}
.mobile-panel{display:none;border-top:1px solid rgba(255,255,255,.08);padding:10px 0 16px;}
.mobile-panel a{
  display:block;padding:12px 4px;color:#c6d2dc;font-size:15px;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-panel a:last-child{border-bottom:0;}
.mobile-panel.is-open{display:block;}
/* page hero */
.page-hero{
  position:relative;overflow:hidden;color:#e8f0f6;
  background:radial-gradient(900px 400px at 88% -20%,rgba(201,162,74,.20),transparent 62%),
             linear-gradient(155deg,#0d1a24 0%,#162c3a 55%,#1f3b4c 100%);
  padding:46px 0 56px;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.65),transparent 90%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.65),transparent 90%);
}
.page-hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:44px;align-items:center;}
.breadcrumb{font-size:13px;color:#8fa4b4;margin-bottom:16px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.breadcrumb a{color:#c6d2dc;}
.breadcrumb a:hover{color:var(--gold-lt);}
.breadcrumb .sep{color:#4d6376;}
.breadcrumb .now{color:var(--gold-lt);}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(201,162,74,.16);border:1px solid rgba(201,162,74,.42);
  color:var(--gold-lt);font-size:13px;font-weight:600;
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.page-hero h1{
  font-size:36px;line-height:1.32;font-weight:800;color:#fff;
  letter-spacing:-.4px;margin-bottom:16px;
}
.page-hero h1 .hl{color:var(--gold-lt);}
.hero-lead{font-size:15.5px;line-height:1.9;color:#a9bdcb;max-width:660px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:11px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease;
  text-align:center;
}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-lt));color:#0d1a24;box-shadow:0 12px 26px rgba(201,162,74,.32);}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(201,162,74,.42);}
.btn-ghost{background:rgba(255,255,255,.06);color:#e9f1f6;border-color:rgba(255,255,255,.22);}
.btn-ghost:hover{background:rgba(255,255,255,.13);transform:translateY(-2px);}
.btn:focus-visible{outline:2px solid var(--gold-lt);outline-offset:3px;}
.hero-panel{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  border-radius:18px;padding:22px;
  backdrop-filter:blur(6px);
  box-shadow:var(--shadow-lg);
}
.hero-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.hero-panel-head h2{font-size:16px;color:#fff;font-weight:700;}
.hero-panel-head span{font-size:12px;color:var(--gold-lt);background:rgba(201,162,74,.16);border:1px solid rgba(201,162,74,.35);padding:3px 9px;border-radius:6px;white-space:nowrap;}
.panel-list{display:grid;gap:10px;}
.panel-item{
  display:grid;grid-template-columns:22px minmax(0,1fr);gap:12px;align-items:start;
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);
  border-radius:11px;padding:11px 13px;
}
.panel-item i{color:var(--gold);font-size:14px;line-height:1.7;}
.panel-item b{display:block;color:#eaf1f6;font-size:14px;font-weight:700;margin-bottom:2px;}
.panel-item p{font-size:13px;color:#9fb4c2;line-height:1.65;}
/* section */
.section{padding:64px 0;}
.section-alt{background:#fff;}
.section-dark{background:linear-gradient(160deg,#0d1a24,#183040);color:#dbe6ee;}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.5px;
  color:var(--gold-dp);background:rgba(201,162,74,.14);
  border:1px solid rgba(201,162,74,.32);
  padding:4px 12px;border-radius:999px;margin-bottom:14px;
}
.section-dark .sec-tag{color:var(--gold-lt);background:rgba(201,162,74,.16);border-color:rgba(201,162,74,.4);}
.sec-title{font-size:28px;line-height:1.4;font-weight:800;color:var(--ink);letter-spacing:-.2px;}
.section-dark .sec-title{color:#fff;}
.sec-desc{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.9;}
.section-dark .sec-desc{color:#a9bdcb;}
/* feature cards */
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.feature-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:0 4px 14px rgba(13,26,36,.05);
  min-width:0;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(201,162,74,.45);}
.feature-icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(201,162,74,.14);color:var(--gold-dp);font-size:17px;margin-bottom:16px;
}
.feature-card h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:8px;}
.feature-card p{font-size:14px;color:var(--muted);line-height:1.85;}
/* cost block */
.cost-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:28px;align-items:start;}
.formula-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);
}
.formula-card h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.formula{
  display:block;background:#0f2433;color:var(--gold-lt);
  font-size:16px;font-weight:700;letter-spacing:.3px;
  border-radius:var(--radius-sm);padding:16px 18px;margin:8px 0 16px;
  overflow-wrap:anywhere;
}
.formula-card p{font-size:14.5px;color:var(--muted);line-height:1.9;}
.cost-note{
  margin-top:16px;border-left:3px solid var(--gold);
  background:rgba(201,162,74,.08);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:12px 16px;font-size:13.5px;color:#7a6532;line-height:1.8;
}
.cost-side{display:grid;gap:16px;}
.cost-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:18px 20px;min-width:0;
}
.cost-item .label{font-size:12.5px;font-weight:700;color:var(--gold-dp);letter-spacing:.4px;}
.cost-item h4{font-size:15.5px;font-weight:700;color:var(--ink);margin:6px 0 6px;}
.cost-item p{font-size:14px;color:var(--muted);line-height:1.8;}
/* compare */
.compare-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.compare-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius);padding:26px 22px;min-width:0;
  transition:border-color .2s ease,transform .2s ease;
}
.compare-card:hover{border-color:rgba(201,162,74,.55);transform:translateY(-3px);}
.compare-card .ratio{font-size:32px;font-weight:800;color:var(--gold-lt);line-height:1.2;}
.compare-card .ratio span{font-size:14px;color:#93a9b8;font-weight:600;margin-left:6px;}
.compare-card ul{margin-top:16px;display:grid;gap:10px;}
.compare-card li{
  font-size:14px;color:#a9bdcb;line-height:1.8;padding-left:16px;position:relative;
}
.compare-card li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--gold);}
.compare-foot{
  margin-top:26px;font-size:13.5px;color:#8fa4b4;line-height:1.9;
  border-top:1px solid rgba(255,255,255,.1);padding-top:18px;
}
/* steps */
.step-list{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;}
.step-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:22px 18px;min-width:0;position:relative;
  transition:box-shadow .2s ease,transform .2s ease;
}
.step-item:hover{box-shadow:var(--shadow);transform:translateY(-2px);}
.step-num{
  width:30px;height:30px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  background:var(--ink);color:var(--gold-lt);font-size:13.5px;font-weight:800;margin-bottom:14px;
}
.step-item h3{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:7px;}
.step-item p{font-size:13.5px;color:var(--muted);line-height:1.8;}
/* checklist */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.check-item{
  display:grid;grid-template-columns:26px minmax(0,1fr);gap:12px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:18px 20px;min-width:0;
}
.check-item i{color:var(--green);font-size:16px;line-height:1.7;}
.check-item b{display:block;font-size:15px;color:var(--ink);margin-bottom:4px;}
.check-item p{font-size:14px;color:var(--muted);line-height:1.8;}
/* glossary */
.gloss-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
.gloss-item{
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--gold);
  border-radius:var(--radius-sm);padding:18px 20px;min-width:0;
}
.gloss-item h3{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.gloss-item p{font-size:13.8px;color:var(--muted);line-height:1.85;}
/* news */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;min-width:0;display:flex;flex-direction:column;gap:10px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(201,162,74,.45);}
.news-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:12.5px;color:#8697a5;}
.news-meta .tag{
  background:rgba(201,162,74,.14);color:var(--gold-dp);border:1px solid rgba(201,162,74,.3);
  border-radius:6px;padding:2px 8px;font-weight:600;
}
.news-card h3{font-size:16.5px;font-weight:700;color:var(--ink);line-height:1.55;}
.news-card h3 a:hover{color:var(--gold-dp);}
.news-card p{font-size:14px;color:var(--muted);line-height:1.8;}
.news-card .more{margin-top:auto;font-size:13.5px;font-weight:700;color:var(--gold-dp);display:inline-flex;align-items:center;gap:6px;}
.news-card .more:hover{gap:10px;}
.empty-tip{
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius-sm);
  padding:26px;text-align:center;color:var(--muted);font-size:14.5px;
}
/* download */
.download-band{
  position:relative;overflow:hidden;
  background:linear-gradient(150deg,#0d1a24,#1a3345 60%,#12293a);
  border:1px solid rgba(201,162,74,.28);
  border-radius:20px;padding:40px;color:#e6eef4;
  box-shadow:var(--shadow-lg);
}
.download-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,162,74,.28),transparent 68%);
  pointer-events:none;
}
.download-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:32px;align-items:center;}
.download-inner h2{font-size:26px;font-weight:800;color:#fff;line-height:1.4;margin-bottom:12px;}
.download-inner p{font-size:14.5px;color:#a9bdcb;line-height:1.9;}
.download-btns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;}
.dl-btn{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-sm);padding:18px 10px;min-width:0;text-align:center;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.dl-btn i{font-size:20px;color:var(--gold-lt);}
.dl-btn b{font-size:14.5px;color:#fff;font-weight:700;}
.dl-btn small{font-size:12px;color:#93a9b8;word-break:break-word;}
.dl-btn:hover{background:rgba(201,162,74,.16);border-color:rgba(201,162,74,.55);transform:translateY(-2px);}
.dl-btn:focus-visible{outline:2px solid var(--gold-lt);outline-offset:3px;}
/* faq */
.faq-list{display:grid;gap:14px;max-width:920px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 22px;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:rgba(201,162,74,.5);box-shadow:var(--shadow);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 0;
  font-size:15.5px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"\002B";color:var(--gold-dp);font-size:18px;font-weight:700;line-height:1;flex:0 0 auto;
}
.faq-item[open] summary::after{content:"\2212";}
.faq-item p{padding:0 0 20px;font-size:14.5px;color:var(--muted);line-height:1.9;}
/* footer */
.site-footer{background:#0b1620;color:#9fb2c0;padding:52px 0 26px;border-top:3px solid var(--gold);}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:34px;}
.footer-brand p{font-size:13.5px;line-height:1.9;color:#8296a6;margin-top:14px;max-width:420px;}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:#7f93a3;}
.footer-col h4{font-size:14.5px;color:#e6eef4;font-weight:700;margin-bottom:14px;}
.footer-col a{display:block;font-size:13.5px;color:#9fb2c0;padding:5px 0;line-height:1.7;transition:color .2s ease,padding-left .2s ease;}
.footer-col a:hover{color:var(--gold-lt);padding-left:4px;}
.footer-bottom{
  margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.09);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:#7b8f9e;line-height:1.8;
}
/* responsive */
@media (max-width:1080px){
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .step-list{grid-template-columns:repeat(3,minmax(0,1fr));}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .gloss-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:960px){
  .nav-links,.nav-cta{display:none;}
  .menu-toggle{display:flex;}
  .page-hero-grid{grid-template-columns:minmax(0,1fr);gap:30px;}
  .page-hero h1{font-size:30px;}
  .cost-grid{grid-template-columns:minmax(0,1fr);}
  .download-inner{grid-template-columns:minmax(0,1fr);gap:24px;}
  .compare-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:768px){
  .section{padding:48px 0;}
  .sec-title{font-size:23px;}
  .page-hero{padding:36px 0 44px;}
  .page-hero h1{font-size:26px;}
  .feature-grid,.check-grid{grid-template-columns:minmax(0,1fr);}
  .step-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-grid,.gloss-grid{grid-template-columns:minmax(0,1fr);}
  .download-band{padding:28px 22px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-brand p{max-width:none;}
}
@media (max-width:560px){
  .wrap{padding:0 16px;}
  .brand-sub{display:none !important;}
  .page-hero h1{font-size:23px;}
  .hero-lead{font-size:14.5px;}
  .compare-grid{grid-template-columns:minmax(0,1fr);}
  .step-list{grid-template-columns:minmax(0,1fr);}
  .download-btns{grid-template-columns:minmax(0,1fr);}
  .btn{width:100%;padding:12px 18px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .footer-bottom{flex-direction:column;}
}