/* roulang page: index */
:root{
  --ink:#111c2b;
  --navy:#132a44;
  --navy-2:#1d3c5e;
  --navy-3:#28527d;
  --gold:#a97c2f;
  --gold-2:#c1953f;
  --gold-soft:#f0e4cb;
  --bg:#f5f6f8;
  --bg-2:#eceff3;
  --surface:#ffffff;
  --line:#e1e6ee;
  --line-2:#cdd6e2;
  --muted:#5d6b7d;
  --ok:#2f7a5b;
  --warn:#b4552f;
  --radius:14px;
  --radius-sm:9px;
  --shadow-sm:0 1px 2px rgba(17,28,43,.05),0 10px 26px rgba(17,28,43,.06);
  --shadow-md:0 2px 6px rgba(17,28,43,.07),0 18px 40px rgba(17,28,43,.10);
  --space:clamp(56px,7vw,88px);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy-2);text-decoration:none;transition:color .22s ease,opacity .22s ease}
a:hover{color:var(--gold)}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:.1px}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--gold-2);outline-offset:3px;border-radius:4px}

.site-container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 22px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,#122740 0%,#132a44 100%);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 6px 22px rgba(11,23,38,.16);
}
.header-inner{
  display:flex;align-items:center;gap:22px;
  min-height:70px;
}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:#fff}
.brand:hover{color:#fff;opacity:.92}
.brand-mark{
  width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--gold-2),#8a6220);
  color:#10202f;font-weight:800;font-size:19px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:19px;letter-spacing:1.2px;color:#fff}
.brand-text small{font-size:11px;color:rgba(255,255,255,.62);letter-spacing:2px}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:12px;flex-wrap:wrap}
.site-nav .nav-link{
  display:inline-block;
  padding:8px 14px;border-radius:8px;
  color:rgba(255,255,255,.78);
  font-size:15px;letter-spacing:.4px;
  transition:background .22s ease,color .22s ease;
}
.site-nav .nav-link:hover{background:rgba(255,255,255,.09);color:#fff}
.site-nav .nav-link.active{background:rgba(193,149,63,.18);color:#f3dfb8;box-shadow:inset 0 0 0 1px rgba(193,149,63,.35)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.btn-ghost{
  display:inline-block;padding:8px 15px;border-radius:8px;
  border:1px solid rgba(255,255,255,.24);
  color:rgba(255,255,255,.86);font-size:14px;
  transition:all .22s ease;
}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.42)}
.btn-gold{
  display:inline-block;padding:9px 18px;border-radius:8px;
  background:linear-gradient(140deg,var(--gold-2),#98711f);
  color:#132a44;font-weight:700;font-size:14px;letter-spacing:.5px;
  border:1px solid rgba(255,255,255,.18);
  box-shadow:0 6px 18px rgba(169,124,47,.28);
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease;
}
.btn-gold:hover{color:#0e2033;transform:translateY(-1px);box-shadow:0 10px 24px rgba(169,124,47,.36);filter:brightness(1.04)}
.btn-gold:active{transform:translateY(0)}
.nav-toggle{
  display:none;margin-left:auto;
  background:rgba(255,255,255,.08);color:#fff;
  border:1px solid rgba(255,255,255,.2);
  border-radius:8px;padding:7px 13px;font-size:14px;cursor:pointer;
}
.nav-toggle:hover{background:rgba(255,255,255,.16)}

/* ---------- buttons ---------- */
.btn-outline{
  display:inline-block;padding:11px 22px;border-radius:var(--radius-sm);
  border:1px solid var(--line-2);background:#fff;color:var(--navy-2);
  font-weight:600;font-size:15px;
  transition:all .22s ease;
}
.btn-outline:hover{border-color:var(--navy-3);color:var(--navy);box-shadow:var(--shadow-sm);transform:translateY(-1px)}
.btn-solid{
  display:inline-block;padding:11px 22px;border-radius:var(--radius-sm);
  background:var(--navy);color:#fff;font-weight:600;font-size:15px;
  border:1px solid var(--navy);
  transition:all .22s ease;
}
.btn-solid:hover{background:var(--navy-3);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn-block{display:block;text-align:center}

/* ---------- hero ---------- */
.hero{
  position:relative;
  background:
    radial-gradient(1100px 460px at 78% -12%,rgba(193,149,63,.16),transparent 62%),
    linear-gradient(180deg,#0f2137 0%,#152c47 62%,#1a3350 100%);
  color:#eef2f7;
  padding:clamp(48px,6vw,78px) 0 clamp(46px,6vw,72px);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(193,149,63,.5),transparent);
}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
  gap:clamp(28px,4vw,54px);
  align-items:start;
  position:relative;z-index:2;
}
.eyebrow{
  display:inline-block;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;letter-spacing:2.4px;
  color:#f0d8a8;background:rgba(193,149,63,.14);
  border:1px solid rgba(193,149,63,.4);
  margin-bottom:18px;
}
.hero h1{
  font-size:clamp(25px,3.1vw,37px);
  line-height:1.32;
  color:#fff;
  letter-spacing:.4px;
  margin-bottom:18px;
}
.hero-lead{
  font-size:15.6px;
  color:rgba(232,240,248,.84);
  line-height:1.85;
  max-width:640px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 20px}
.hero .btn-outline{
  background:transparent;color:#e8f0f8;border-color:rgba(255,255,255,.34);
}
.hero .btn-outline:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.6)}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px}
.hero-points li{
  font-size:13.5px;color:rgba(232,240,248,.72);
  padding-left:18px;position:relative;
}
.hero-points li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:7px;height:7px;border-radius:2px;
  background:var(--gold-2);
}
.hero-panel{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.15);
  border-radius:16px;
  padding:20px 20px 18px;
  backdrop-filter:blur(6px);
  box-shadow:0 24px 60px rgba(6,16,28,.4);
}
.panel-head{
  display:flex;align-items:center;gap:9px;
  font-size:13.5px;letter-spacing:1.2px;color:#f0d8a8;
  padding-bottom:12px;margin-bottom:6px;
  border-bottom:1px dashed rgba(255,255,255,.18);
}
.panel-dot{width:8px;height:8px;border-radius:50%;background:var(--gold-2);box-shadow:0 0 0 4px rgba(193,149,63,.16)}
.panel-list li{
  display:flex;align-items:flex-start;gap:10px;
  padding:12px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
  font-size:14.4px;color:rgba(238,244,250,.9);
}
.panel-list li:last-child{border-bottom:none}
.panel-state{
  margin-left:auto;flex:0 0 auto;
  font-size:11.5px;letter-spacing:.6px;
  padding:2px 8px;border-radius:999px;
  border:1px solid rgba(193,149,63,.5);color:#f0d8a8;
}
.panel-note{
  margin-top:14px;padding:11px 13px;
  border-radius:10px;background:rgba(193,149,63,.1);
  border-left:3px solid var(--gold-2);
  font-size:13px;color:rgba(238,244,250,.8);line-height:1.7;
}

/* ---------- sections ---------- */
.section{padding:var(--space) 0}
.section-tight{padding:calc(var(--space) * .72) 0}
.section-alt{background:var(--bg-2)}
.section-dark{
  background:linear-gradient(180deg,#122740,#193352);
  color:#e9f0f7;
}
.section-dark .section-sub,
.section-dark .section-desc{color:rgba(233,240,247,.75)}
.section-head{max-width:820px;margin-bottom:34px}
.section-kicker{
  display:inline-block;font-size:12.5px;letter-spacing:2.6px;
  color:var(--gold);margin-bottom:10px;
}
.section-dark .section-kicker{color:#e3c98f}
.section-title{
  font-size:clamp(21px,2.3vw,28px);
  color:var(--navy);
  margin-bottom:14px;
}
.section-dark .section-title{color:#fff}
.section-desc{
  font-size:15.2px;color:var(--muted);line-height:1.85;
}

/* ---------- metrics ---------- */
.metric-grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
}
.metric-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 20px;
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  min-width:0;
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.metric-num{
  font-size:34px;font-weight:800;line-height:1.1;
  color:var(--navy);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.5px;
}
.metric-num span{font-size:15px;font-weight:600;color:var(--gold);margin-left:3px}
.metric-label{margin-top:8px;font-size:14.5px;font-weight:600;color:var(--ink)}
.metric-hint{margin-top:6px;font-size:13px;color:var(--muted);line-height:1.65}

/* ---------- dimension cards ---------- */
.dim-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.site-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  min-width:0;
}
.site-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.card-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:9px;
  background:var(--gold-soft);color:#7d5a1c;
  font-weight:800;font-size:14.5px;margin-bottom:14px;
}
.card-title{font-size:17px;color:var(--navy);margin-bottom:9px}
.card-text{font-size:14.3px;color:var(--muted);line-height:1.78}

/* ---------- compare table ---------- */
.table-wrap{
  overflow-x:auto;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
}
.compare-table{
  width:100%;min-width:720px;border-collapse:collapse;
  font-size:14.2px;
}
.compare-table th,.compare-table td{
  padding:15px 18px;text-align:left;vertical-align:top;
  border-bottom:1px solid var(--line);
}
.compare-table thead th{
  background:#eef2f7;color:var(--navy);
  font-size:13.6px;letter-spacing:.6px;
  border-bottom:1px solid var(--line-2);
  white-space:nowrap;
}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody tr:hover{background:#fafbfd}
.compare-table .col-good{background:#f3f8f4}
.compare-table thead .col-good{background:#e3efe6;color:#25614a}
.cell-key{font-weight:600;color:var(--ink);white-space:nowrap}
.tag{
  display:inline-block;padding:2px 9px;border-radius:999px;
  font-size:12px;letter-spacing:.4px;
  background:#eef2f7;color:var(--navy-2);border:1px solid var(--line-2);
}
.tag-good{background:#e6f2e9;color:#25614a;border-color:#c7e2cf}
.tag-warn{background:#fbeee7;color:#94401e;border-color:#f0d3c3}

/* ---------- case ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.case-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 22px;
  box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .25s ease,box-shadow .25s ease;
  border-top:3px solid var(--gold-2);
}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.case-label{font-size:12.5px;letter-spacing:2px;color:var(--gold);margin-bottom:10px}
.case-title{font-size:16.5px;color:var(--navy);margin-bottom:10px}
.case-text{font-size:14.2px;color:var(--muted);line-height:1.8}

/* ---------- before / after ---------- */
.compare-col-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.compare-box{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 22px;min-width:0;
  box-shadow:var(--shadow-sm);
}
.compare-box.is-good{border-color:#c7e2cf;background:#f8fbf8}
.compare-box h3{font-size:16.5px;margin-bottom:14px;color:var(--navy)}
.compare-box.is-bad h3{color:#8c3d20}
.compare-list li{
  position:relative;padding-left:22px;margin-bottom:11px;
  font-size:14.3px;color:#3c4a5b;line-height:1.75;
}
.compare-list li:last-child{margin-bottom:0}
.compare-list li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:9px;height:9px;border-radius:2px;background:#d8a99a;
}
.compare-box.is-good .compare-list li::before{background:#7fb894}

/* ---------- steps ---------- */
.step-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.step-card{
  position:relative;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 20px 22px;min-width:0;
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.step-num{
  font-size:13px;font-weight:700;letter-spacing:2px;color:var(--gold);
  display:block;margin-bottom:10px;
}
.step-card h3{font-size:16px;color:var(--navy);margin-bottom:9px}
.step-card p{font-size:14px;color:var(--muted);line-height:1.75}
.step-line{height:2px;background:linear-gradient(90deg,var(--gold-2),rgba(193,149,63,0));margin-top:16px;border-radius:2px}

/* ---------- milestone ---------- */
.milestone{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.mile-card{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);padding:24px 22px;min-width:0;
  transition:background .25s ease,transform .25s ease;
}
.mile-card:hover{background:rgba(255,255,255,.09);transform:translateY(-3px)}
.mile-step{font-size:12.5px;letter-spacing:2px;color:#e3c98f;margin-bottom:10px}
.mile-card h3{font-size:17px;color:#fff;margin-bottom:10px}
.mile-card p{font-size:14.2px;color:rgba(233,240,247,.78);line-height:1.8}

/* ---------- channel entry ---------- */
.channel-card{
  display:grid;grid-template-columns:minmax(0,1fr) auto;
  gap:24px;align-items:center;
  background:var(--surface);
  border:1px solid var(--line);
  border-left:4px solid var(--gold-2);
  border-radius:var(--radius);
  padding:28px 26px;
  box-shadow:var(--shadow-sm);
}
.channel-card h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.channel-card p{font-size:14.6px;color:var(--muted);line-height:1.8;max-width:760px}
.channel-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ---------- checklist ---------- */
.check-panel{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 24px;
  box-shadow:var(--shadow-sm);
}
.check-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px 0 20px}
.check-item{
  display:flex;align-items:flex-start;gap:11px;
  padding:14px 15px;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:#fafbfd;
  font-size:14.2px;color:#3c4a5b;line-height:1.7;
  cursor:pointer;transition:border-color .2s ease,background .2s ease;
}
.check-item:hover{border-color:var(--line-2);background:#f5f8fb}
.check-item input{
  margin-top:4px;width:17px;height:17px;flex:0 0 auto;
  accent-color:var(--navy-3);cursor:pointer;
}
.progress-head{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;font-size:13.6px;color:var(--muted);
}
.progress-bar-track{
  height:9px;border-radius:999px;background:#e8edf3;
  overflow:hidden;margin-top:8px;
}
.progress-bar-fill{
  height:100%;width:0%;
  background:linear-gradient(90deg,var(--navy-3),var(--gold-2));
  border-radius:999px;
  transition:width .35s ease;
}

/* ---------- download ---------- */
.download{
  background:linear-gradient(180deg,#122740,#16304f);
  color:#eaf1f8;
}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:30px}
.dl-card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius);
  padding:24px 22px;min-width:0;
  display:flex;flex-direction:column;
  transition:background .25s ease,border-color .25s ease,transform .25s ease;
}
.dl-card:hover{background:rgba(255,255,255,.1);border-color:rgba(193,149,63,.5);transform:translateY(-3px)}
.dl-name{font-size:17px;color:#fff;margin-bottom:8px}
.dl-desc{font-size:13.7px;color:rgba(233,240,247,.75);line-height:1.75;flex:1 1 auto}
.dl-btn{
  margin-top:18px;display:block;text-align:center;
  padding:11px 16px;border-radius:var(--radius-sm);
  background:linear-gradient(140deg,var(--gold-2),#98711f);
  color:#132a44;font-weight:700;font-size:14.5px;
  transition:filter .22s ease,transform .22s ease;
}
.dl-btn:hover{filter:brightness(1.06);transform:translateY(-1px);color:#0e2033}
.dl-btn:active{transform:translateY(0)}
.dl-note{
  margin-top:22px;font-size:13px;color:rgba(233,240,247,.65);
  border-top:1px dashed rgba(255,255,255,.18);padding-top:16px;
}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:minmax(0,1.62fr) minmax(0,1fr);gap:26px;align-items:start}
.news-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.news-card{display:flex;flex-direction:column;min-width:0}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:9px;margin-bottom:11px}
.news-date{font-size:12.5px;color:var(--muted);letter-spacing:.4px}
.news-title{font-size:16px;line-height:1.55;margin-bottom:9px}
.news-title a{color:var(--navy)}
.news-title a:hover{color:var(--gold)}
.news-summary{font-size:13.9px;color:var(--muted);line-height:1.75;flex:1 1 auto}
.news-more{
  display:inline-block;margin-top:14px;
  font-size:13.4px;color:var(--navy-3);font-weight:600;
  padding-left:16px;position:relative;
}
.news-more::before{
  content:"";position:absolute;left:0;top:.62em;
  width:8px;height:8px;border-radius:2px;background:var(--gold-2);
}
.news-more:hover{color:var(--gold)}
.news-empty{
  padding:26px;border:1px dashed var(--line-2);border-radius:var(--radius);
  background:#fafbfd;color:var(--muted);font-size:14.4px;
}
.news-side{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 22px;
  box-shadow:var(--shadow-sm);
}
.news-side h3{font-size:16.5px;color:var(--navy);margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-list li{padding:11px 0;border-bottom:1px dashed var(--line);font-size:14.2px;line-height:1.7}
.side-list li:last-child{border-bottom:none;padding-bottom:0}
.side-list a{color:#33445a;display:block}
.side-list a:hover{color:var(--gold)}
.side-foot{margin-top:16px;font-size:13.4px}

/* ---------- risk / badges ---------- */
.risk-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.risk-card{
  background:var(--surface);border:1px solid var(--line);
  border-left:3px solid var(--warn);
  border-radius:var(--radius);padding:22px 20px;
  box-shadow:var(--shadow-sm);min-width:0;
}
.risk-card h3{font-size:16px;color:var(--navy);margin-bottom:9px}
.risk-card p{font-size:14.1px;color:var(--muted);line-height:1.78}
.badge-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.badge-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px 18px;
  box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .25s ease,box-shadow .25s ease;
}
.badge-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.badge-icon{
  width:32px;height:32px;border-radius:9px;
  display:grid;place-items:center;margin-bottom:12px;
  background:var(--gold-soft);color:#7d5a1c;font-weight:800;font-size:14px;
}
.badge-card h3{font-size:15.4px;color:var(--navy);margin-bottom:7px}
.badge-card p{font-size:13.6px;color:var(--muted);line-height:1.7}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:980px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:0;
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item[open]{border-color:var(--line-2);box-shadow:var(--shadow-md)}
.faq-item summary{
  cursor:pointer;list-style:none;
  padding:18px 52px 18px 22px;
  font-size:15.6px;font-weight:600;color:var(--navy);
  position:relative;
  transition:color .2s ease,background .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--gold);background:#fafbfd}
.faq-item summary::after{
  content:"";position:absolute;right:22px;top:50%;
  width:9px;height:9px;
  border-right:2px solid var(--gold);border-bottom:2px solid var(--gold);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s ease;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-answer{padding:0 22px 20px;font-size:14.4px;color:var(--muted);line-height:1.85}

/* ---------- close cta ---------- */
.close-cta{
  background:linear-gradient(135deg,#16304f,#20406a);
  border-radius:18px;
  padding:clamp(28px,4vw,44px);
  color:#eaf1f8;
  display:grid;grid-template-columns:minmax(0,1fr) auto;
  gap:26px;align-items:center;
  box-shadow:0 24px 60px rgba(17,28,43,.22);
}
.close-cta h2{font-size:clamp(19px,2.2vw,25px);color:#fff;margin-bottom:12px}
.close-cta p{font-size:14.8px;color:rgba(233,240,247,.8);line-height:1.85;max-width:720px}
.close-actions{display:flex;flex-wrap:wrap;gap:12px}
.close-cta .btn-outline{background:transparent;color:#e8f0f8;border-color:rgba(255,255,255,.34)}
.close-cta .btn-outline:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.6)}

/* ---------- footer ---------- */
.site-footer{
  margin-top:calc(var(--space) * .6);
  background:#0e1e31;
  color:rgba(226,236,246,.72);
  padding:clamp(40px,5vw,58px) 0 26px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:30px;
  padding-bottom:30px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:13.8px;line-height:1.85;color:rgba(226,236,246,.66);max-width:420px}
.footer-col h4{
  font-size:14px;color:#fff;letter-spacing:1px;margin-bottom:14px;font-weight:600;
}
.footer-col li{margin-bottom:9px;font-size:13.8px}
.footer-col a{color:rgba(226,236,246,.72)}
.footer-col a:hover{color:var(--gold-2)}
.footer-bottom{
  padding-top:20px;
  display:flex;flex-wrap:wrap;gap:10px 22px;
  justify-content:space-between;align-items:center;
  font-size:13px;color:rgba(226,236,246,.55);
}
.footer-disclaimer{
  margin-top:20px;padding:14px 16px;
  border-radius:10px;background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  font-size:12.8px;line-height:1.8;color:rgba(226,236,246,.62);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .dim-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-nav{margin-left:6px}
  .header-actions .btn-ghost{display:none}
  .step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-grid{grid-template-columns:minmax(0,1fr)}
  .badge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .risk-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .close-cta{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:860px){
  .site-nav{
    display:none;
    width:100%;margin:0 0 14px;
    flex-direction:column;align-items:stretch;gap:4px;
    padding:10px;border-radius:12px;
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.12);
  }
  .site-nav.is-open{display:flex}
  .site-nav .nav-link{padding:11px 13px}
  .header-inner{flex-wrap:wrap;padding-top:12px;padding-bottom:12px;min-height:0;gap:12px}
  .nav-toggle{display:inline-block}
  .header-actions{margin-left:0;width:100%;padding-bottom:4px}
  .header-actions .btn-gold{width:100%;text-align:center;padding:11px 16px}
  .dl-grid{grid-template-columns:minmax(0,1fr)}
  .check-list{grid-template-columns:minmax(0,1fr)}
  .channel-card{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:768px){
  .dim-grid,.case-grid,.milestone,.risk-grid,.news-cards,.compare-col-grid,.step-grid{grid-template-columns:minmax(0,1fr)}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .badge-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .section{padding:clamp(42px,8vw,60px) 0}
  .hero{padding-top:38px}
  .close-actions{width:100%}
  .close-actions a{width:100%;text-align:center}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .metric-grid{grid-template-columns:minmax(0,1fr)}
  .brand-text strong{font-size:17px}
  .brand-text small{font-size:10px;letter-spacing:1.4px}
  .metric-num{font-size:29px}
  .hero-lead{font-size:14.8px}
  .compare-table{font-size:13.4px}
  .compare-table th,.compare-table td{padding:12px 14px}
}

/* roulang page: article */
:root{
  --ink:#111c2b;
  --navy:#132a44;
  --navy-2:#1d3c5e;
  --navy-3:#28527d;
  --gold:#a97c2f;
  --gold-2:#c1953f;
  --gold-soft:#f0e4cb;
  --bg:#f5f6f8;
  --bg-2:#eceff3;
  --surface:#ffffff;
  --line:#e1e6ee;
  --line-2:#cdd6e2;
  --muted:#5d6b7d;
  --ok:#2f7a5b;
  --warn:#b4552f;
  --radius:14px;
  --radius-sm:9px;
  --shadow-sm:0 1px 2px rgba(17,28,43,.05),0 10px 26px rgba(17,28,43,.06);
  --shadow-md:0 2px 6px rgba(17,28,43,.07),0 18px 40px rgba(17,28,43,.10);
  --space:clamp(56px,7vw,88px);
}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy-2);text-decoration:none;transition:color .22s ease,opacity .22s ease}
a:hover{color:var(--gold)}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.site-container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 22px;
}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,#122740 0%,#132a44 100%);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 6px 22px rgba(11,23,38,.16);
}
.header-inner{
  display:flex;align-items:center;gap:22px;
  min-height:70px;
}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:#fff}
.brand:hover{color:#fff;opacity:.92}
.brand-mark{
  width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--gold-2),#8a6220);
  color:#10202f;font-weight:800;font-size:19px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:19px;letter-spacing:1.2px;color:#fff}
.brand-text small{font-size:11px;color:rgba(255,255,255,.62);letter-spacing:2px}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:12px;flex-wrap:wrap}
.site-nav .nav-link{
  display:inline-block;
  padding:8px 14px;border-radius:8px;
  color:rgba(255,255,255,.78);
  font-size:15px;letter-spacing:.4px;
  transition:background .22s ease,color .22s ease;
}
.site-nav .nav-link:hover{background:rgba(255,255,255,.09);color:#fff}
.site-nav .nav-link.active{background:rgba(193,149,63,.18);color:#f3dfb8;box-shadow:inset 0 0 0 1px rgba(193,149,63,.35)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.btn-ghost{
  display:inline-block;padding:8px 15px;border-radius:8px;
  border:1px solid rgba(255,255,255,.24);
  color:rgba(255,255,255,.86);font-size:14px;
  transition:all .22s ease;
}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.42)}
.btn-gold{
  display:inline-block;padding:9px 18px;border-radius:8px;
  background:linear-gradient(140deg,var(--gold-2),#98711f);
  color:#132a44;font-weight:700;font-size:14px;letter-spacing:.5px;
  border:1px solid rgba(255,255,255,.18);
  box-shadow:0 6px 18px rgba(169,124,47,.28);
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease;
}
.btn-gold:hover{color:#0e2033;transform:translateY(-1px);box-shadow:0 10px 24px rgba(169,124,47,.36);filter:brightness(1.04)}
.btn-gold:active{transform:translateY(0)}
.nav-toggle{
  display:none;margin-left:auto;
  background:rgba(255,255,255,.08);color:#fff;
  border:1px solid rgba(255,255,255,.2);
  border-radius:8px;padding:7px 13px;font-size:14px;cursor:pointer;
}
.nav-toggle:hover{background:rgba(255,255,255,.16)}
/* ---------- buttons ---------- */
.btn-outline{
  display:inline-block;padding:11px 22px;border-radius:var(--radius-sm);
  border:1px solid var(--line-2);background:#fff;color:var(--navy-2);
  font-weight:600;font-size:15px;
  transition:all .22s ease;
}
.btn-outline:hover{border-color:var(--navy-3);color:var(--navy);box-shadow:var(--shadow-sm);transform:translateY(-1px)}
.btn-solid{
  display:inline-block;padding:11px 22px;border-radius:var(--radius-sm);
  background:var(--navy);color:#fff;font-weight:600;font-size:15px;
  border:1px solid var(--navy);
  transition:all .22s ease;
}
.btn-solid:hover{background:var(--navy-3);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn-block{display:block;text-align:center}
/* ---------- article hero ---------- */
.article-hero{
  position:relative;
  background:
    radial-gradient(900px 380px at 82% -20%,rgba(193,149,63,.18),transparent 62%),
    linear-gradient(180deg,#0f2137 0%,#152c47 68%,#1a3350 100%);
  color:#eef2f7;
  padding:clamp(34px,4.4vw,54px) 0 clamp(36px,4.6vw,56px);
  overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(193,149,63,.5),transparent);
}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:rgba(232,240,248,.62);margin-bottom:18px;
}
.crumb a{color:rgba(232,240,248,.8)}
.crumb a:hover{color:var(--gold-2)}
.crumb span.sep{color:rgba(232,240,248,.34)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.tag-pill{
  display:inline-block;padding:4px 12px;border-radius:999px;
  font-size:12.5px;letter-spacing:1.4px;
  color:#f0d8a8;background:rgba(193,149,63,.14);
  border:1px solid rgba(193,149,63,.4);
}
.tag-pill.plain{
  color:rgba(232,240,248,.78);
  background:rgba(255,255,255,.06);
  border-color:rgba(255,255,255,.18);
  letter-spacing:.6px;
}
.article-hero h1{
  font-size:clamp(24px,2.9vw,34px);
  line-height:1.36;
  color:#fff;
  letter-spacing:.3px;
  max-width:900px;
}
.hero-lead{
  margin-top:16px;
  font-size:15.4px;
  color:rgba(232,240,248,.84);
  line-height:1.9;
  max-width:820px;
}
.meta-row{
  display:flex;flex-wrap:wrap;gap:10px 26px;
  margin-top:22px;font-size:13.4px;color:rgba(232,240,248,.68);
}
.meta-row i{margin-right:6px;color:var(--gold-2)}
/* ---------- article layout ---------- */
.article-section{padding:var(--space) 0}
.article-section.tight{padding-top:clamp(34px,4vw,52px)}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 330px;
  gap:clamp(22px,3vw,38px);
  align-items:start;
}
.article-paper{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  padding:clamp(22px,3vw,40px);
  min-width:0;
}
.article-body{
  color:#243244;
  font-size:16.2px;
  line-height:1.95;
  min-width:0;
  overflow-wrap:break-word;
}
.article-body h2{
  font-size:clamp(19px,2.1vw,23px);
  color:var(--navy);
  margin:36px 0 14px;
  padding-left:14px;
  border-left:4px solid var(--gold-2);
  line-height:1.5;
}
.article-body h2:first-child{margin-top:0}
.article-body h3{
  font-size:17.5px;
  color:var(--navy-2);
  margin:26px 0 10px;
  line-height:1.6;
}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;list-style:revert}
.article-body li{margin-bottom:8px}
.article-body a{color:var(--navy-3);border-bottom:1px solid rgba(40,82,125,.28)}
.article-body a:hover{color:var(--gold);border-bottom-color:rgba(169,124,47,.4)}
.article-body img{border-radius:var(--radius-sm);margin:18px 0;box-shadow:var(--shadow-sm)}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;
  background:var(--bg-2);
  border-left:4px solid var(--navy-3);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--navy-2);
}
.article-body table{
  display:block;width:100%;overflow-x:auto;
  border-collapse:collapse;margin:18px 0;font-size:15px;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--bg-2);color:var(--navy)}
.article-body strong{color:var(--navy)}
.empty-note{
  padding:46px 20px;text-align:center;
  background:var(--bg-2);border-radius:var(--radius-sm);
}
.empty-note strong{display:block;font-size:19px;color:var(--navy);margin-bottom:8px}
.empty-note p{color:var(--muted);font-size:14.6px;margin-bottom:18px}
/* ---------- sidebar ---------- */
.side-stack{display:grid;gap:18px;min-width:0}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  padding:20px;
  min-width:0;
}
.side-card h3{
  font-size:15.5px;color:var(--navy);
  display:flex;align-items:center;gap:8px;
  margin-bottom:14px;letter-spacing:.4px;
}
.side-card h3::before{
  content:"";width:6px;height:16px;border-radius:2px;
  background:linear-gradient(180deg,var(--gold-2),#8a6220);
}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  padding:10px 0;border-bottom:1px dashed var(--line);
  font-size:14.2px;color:#33445a;line-height:1.7;
}
.check-list li:last-child{border-bottom:none;padding-bottom:0}
.check-list i{color:var(--gold);margin-top:5px;font-size:12px}
.side-card .btn-solid,.side-card .btn-outline{width:100%;text-align:center;margin-top:6px}
.side-note{font-size:12.8px;color:var(--muted);line-height:1.7;margin-top:12px}
/* ---------- download band ---------- */
.dl-band{
  background:linear-gradient(150deg,#132a44 0%,#1b3a5b 60%,#22456a 100%);
  border-radius:18px;
  padding:clamp(24px,3.4vw,40px);
  color:#eaf1f8;
  box-shadow:var(--shadow-md);
  position:relative;overflow:hidden;
}
.dl-band::before{
  content:"";position:absolute;right:-60px;top:-70px;
  width:250px;height:250px;border-radius:50%;
  background:radial-gradient(circle,rgba(193,149,63,.28),transparent 68%);
}
.dl-band-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);
  gap:clamp(20px,3vw,40px);align-items:center;
}
.dl-band h2{font-size:clamp(20px,2.3vw,26px);color:#fff;margin-bottom:12px}
.dl-band p{font-size:14.6px;color:rgba(234,241,248,.8);line-height:1.85}
.dl-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.dl-btn{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:16px 10px;border-radius:12px;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.2);
  color:#eef4fa;font-size:14px;font-weight:600;
  transition:all .24s ease;text-align:center;
}
.dl-btn i{font-size:19px;color:var(--gold-2)}
.dl-btn small{font-size:11.5px;color:rgba(234,241,248,.6);font-weight:400;letter-spacing:.4px}
.dl-btn:hover{
  background:rgba(193,149,63,.22);
  border-color:rgba(193,149,63,.6);
  color:#fff;transform:translateY(-2px);
}
.dl-btn:focus-visible{outline:2px solid var(--gold-2);outline-offset:3px}
/* ---------- dimension grid ---------- */
.section-head{margin-bottom:clamp(26px,3vw,38px);max-width:760px}
.section-eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:2.4px;
  color:var(--gold);font-weight:600;margin-bottom:10px;
}
.section-head h2{
  font-size:clamp(21px,2.5vw,29px);
  color:var(--navy);line-height:1.45;
}
.section-head p{margin-top:12px;color:var(--muted);font-size:15.2px;line-height:1.85}
.dim-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.dim-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 20px;
  box-shadow:var(--shadow-sm);
  min-width:0;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.dim-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.dim-num{
  font-size:12.5px;font-weight:700;letter-spacing:1.6px;
  color:var(--gold);margin-bottom:10px;
}
.dim-card h3{font-size:16.5px;color:var(--navy);margin-bottom:8px}
.dim-card p{font-size:14.4px;color:var(--muted);line-height:1.8}
/* ---------- steps ---------- */
.step-wrap{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
}
.step-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-top:3px solid var(--navy-3);
  border-radius:var(--radius-sm);
  padding:20px 18px;
  min-width:0;
}
.step-card span.step-idx{
  display:inline-grid;place-items:center;
  width:26px;height:26px;border-radius:8px;
  background:var(--bg-2);color:var(--navy);
  font-size:13px;font-weight:700;margin-bottom:12px;
}
.step-card h3{font-size:15.5px;color:var(--navy);margin-bottom:8px}
.step-card p{font-size:14px;color:var(--muted);line-height:1.8}
/* ---------- compare list ---------- */
.compare-box{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.compare-row{
  display:grid;
  grid-template-columns:minmax(0,180px) minmax(0,1fr) minmax(0,1fr);
  gap:0;
  border-bottom:1px solid var(--line);
}
.compare-row:last-child{border-bottom:none}
.compare-row > div{
  padding:14px 16px;font-size:14.4px;line-height:1.75;min-width:0;
}
.compare-row .c-key{
  background:var(--bg-2);color:var(--navy);font-weight:600;
  border-right:1px solid var(--line);
}
.compare-row .c-good{color:#2c4a36;background:#f6faf7}
.compare-row .c-bad{color:#5b3524;background:#fdf7f3}
.compare-head > div{font-weight:700;color:var(--navy);background:#eef2f7}
/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.faq-item summary{
  cursor:pointer;list-style:none;
  padding:16px 20px;
  font-size:15.6px;font-weight:600;color:var(--navy);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  transition:background .22s ease,color .22s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#f7f9fc;color:var(--navy-3)}
.faq-item summary:focus-visible{outline:2px solid var(--navy-3);outline-offset:-3px}
.faq-item summary::after{
  content:"+";font-size:19px;color:var(--gold);flex:0 0 auto;line-height:1;
  transition:transform .22s ease;
}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-body{
  padding:0 20px 18px;
  font-size:14.8px;color:var(--muted);line-height:1.9;
  border-top:1px solid var(--line);
  padding-top:16px;
}
/* ---------- footer ---------- */
.site-footer{
  background:linear-gradient(180deg,#0f2137 0%,#0d1c2e 100%);
  color:rgba(232,240,248,.72);
  padding:clamp(40px,5vw,62px) 0 26px;
  margin-top:clamp(40px,5vw,64px);
  border-top:1px solid rgba(193,149,63,.22);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:clamp(22px,3vw,40px);
}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:13.8px;line-height:1.85;color:rgba(232,240,248,.62);max-width:420px}
.footer-col h4{
  font-size:14.5px;color:#fff;margin-bottom:14px;letter-spacing:.6px;
}
.footer-col ul li{margin-bottom:9px}
.footer-col ul li a{font-size:13.8px;color:rgba(232,240,248,.7)}
.footer-col ul li a:hover{color:var(--gold-2)}
.footer-disclaimer{
  margin-top:34px;padding:16px 18px;
  font-size:12.8px;line-height:1.9;color:rgba(232,240,248,.58);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.09);
  border-radius:var(--radius-sm);
}
.footer-bottom{
  margin-top:20px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.09);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.8px;color:rgba(232,240,248,.5);
}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .dim-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step-wrap{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .dl-band-inner{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:900px){
  .site-nav{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    background:#132a44;
    padding:12px 18px 18px;
    flex-direction:column;align-items:stretch;gap:4px;
    border-bottom:1px solid rgba(255,255,255,.1);
    box-shadow:0 18px 30px rgba(8,18,30,.28);
  }
  .site-nav.is-open{display:flex}
  .site-nav .nav-link{padding:11px 12px;border-radius:8px}
  .nav-toggle{display:block}
  .header-actions{display:none}
  .header-inner{position:relative;min-height:64px}
}
@media (max-width:768px){
  .compare-row{grid-template-columns:minmax(0,1fr)}
  .compare-row .c-key{border-right:none;border-bottom:1px solid var(--line)}
  .compare-head{display:none}
  .dl-buttons{grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}
  .dl-btn{padding:13px 6px;font-size:13px}
  .dl-btn i{font-size:17px}
  .dl-btn small{display:none}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .dim-grid{grid-template-columns:minmax(0,1fr)}
  .step-wrap{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .article-body{font-size:15.6px}
  .article-paper{padding:20px 16px}
  .dl-buttons{grid-template-columns:minmax(0,1fr)}
  .dl-btn{flex-direction:row;justify-content:center;gap:10px;padding:14px 12px}
  .dl-btn small{display:inline}
}

/* roulang page: category1 */
:root{
  --ink:#111c2b;
  --navy:#132a44;
  --navy-2:#1d3c5e;
  --navy-3:#28527d;
  --gold:#a97c2f;
  --gold-2:#c1953f;
  --gold-soft:#f0e4cb;
  --bg:#f5f6f8;
  --bg-2:#eceff3;
  --surface:#ffffff;
  --line:#e1e6ee;
  --line-2:#cdd6e2;
  --muted:#5d6b7d;
  --ok:#2f7a5b;
  --warn:#b4552f;
  --radius:14px;
  --radius-sm:9px;
  --shadow-sm:0 1px 2px rgba(17,28,43,.05),0 10px 26px rgba(17,28,43,.06);
  --shadow-md:0 2px 6px rgba(17,28,43,.07),0 18px 40px rgba(17,28,43,.10);
  --space:clamp(56px,7vw,88px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy-2);text-decoration:none;transition:color .22s ease,opacity .22s ease}
a:hover{color:var(--gold)}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700}
p{margin:0}
:focus-visible{outline:2px solid var(--gold-2);outline-offset:3px}
.site-container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 22px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,#122740 0%,#132a44 100%);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 6px 22px rgba(11,23,38,.16);
}
.header-inner{
  display:flex;align-items:center;gap:22px;
  min-height:70px;
}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:#fff}
.brand:hover{color:#fff;opacity:.92}
.brand-mark{
  width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--gold-2),#8a6220);
  color:#10202f;font-weight:800;font-size:19px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:19px;letter-spacing:1.2px;color:#fff}
.brand-text small{font-size:11px;color:rgba(255,255,255,.62);letter-spacing:2px}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:12px;flex-wrap:wrap}
.site-nav .nav-link{
  display:inline-block;
  padding:8px 14px;border-radius:8px;
  color:rgba(255,255,255,.78);
  font-size:15px;letter-spacing:.4px;
  transition:background .22s ease,color .22s ease;
}
.site-nav .nav-link:hover{background:rgba(255,255,255,.09);color:#fff}
.site-nav .nav-link.active{background:rgba(193,149,63,.18);color:#f3dfb8;box-shadow:inset 0 0 0 1px rgba(193,149,63,.35)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.btn-ghost{
  display:inline-block;padding:8px 15px;border-radius:8px;
  border:1px solid rgba(255,255,255,.24);
  color:rgba(255,255,255,.86);font-size:14px;
  transition:all .22s ease;
}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.42)}
.btn-gold{
  display:inline-block;padding:9px 18px;border-radius:8px;
  background:linear-gradient(140deg,var(--gold-2),#98711f);
  color:#132a44;font-weight:700;font-size:14px;letter-spacing:.5px;
  border:1px solid rgba(255,255,255,.18);
  box-shadow:0 6px 18px rgba(169,124,47,.28);
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease;
}
.btn-gold:hover{color:#0e2033;transform:translateY(-1px);box-shadow:0 10px 24px rgba(169,124,47,.36);filter:brightness(1.04)}
.btn-gold:active{transform:translateY(0)}
.nav-toggle{
  display:none;margin-left:auto;
  background:rgba(255,255,255,.08);color:#fff;
  border:1px solid rgba(255,255,255,.2);
  border-radius:8px;padding:7px 13px;font-size:14px;cursor:pointer;
}
.nav-toggle:hover{background:rgba(255,255,255,.16)}

/* ---------- buttons ---------- */
.btn-outline{
  display:inline-block;padding:11px 22px;border-radius:var(--radius-sm);
  border:1px solid var(--line-2);background:#fff;color:var(--navy-2);
  font-weight:600;font-size:15px;
  transition:all .22s ease;
}
.btn-outline:hover{border-color:var(--navy-3);color:var(--navy);box-shadow:var(--shadow-sm);transform:translateY(-1px)}
.btn-solid{
  display:inline-block;padding:11px 22px;border-radius:var(--radius-sm);
  background:var(--navy);color:#fff;font-weight:600;font-size:15px;
  border:1px solid var(--navy);
  transition:all .22s ease;
}
.btn-solid:hover{background:var(--navy-3);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn-block{display:block;text-align:center}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  background:
    radial-gradient(1000px 420px at 82% -16%,rgba(193,149,63,.16),transparent 62%),
    linear-gradient(180deg,#0f2137 0%,#152c47 64%,#1a3350 100%);
  color:#eef2f7;
  padding:clamp(40px,5vw,64px) 0 clamp(44px,5.5vw,68px);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(193,149,63,.5),transparent);
}
.hero-columns{
  display:grid;
  grid-template-columns:minmax(0,1.14fr) minmax(0,.86fr);
  gap:clamp(26px,4vw,52px);
  align-items:start;
  position:relative;z-index:2;
}
.crumb{font-size:12.5px;letter-spacing:1.6px;color:rgba(232,240,248,.58)}
.crumb span{color:rgba(193,149,63,.9)}
.eyebrow{
  display:inline-block;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;letter-spacing:2.2px;
  color:#f0d8a8;background:rgba(193,149,63,.14);
  border:1px solid rgba(193,149,63,.4);
  margin:16px 0 16px;
}
.page-hero h1{
  font-size:clamp(24px,2.9vw,34px);
  line-height:1.36;
  color:#fff;
  letter-spacing:.4px;
  margin-bottom:16px;
}
.hero-lead{
  font-size:15.6px;
  color:rgba(232,240,248,.85);
  line-height:1.9;
  max-width:640px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.page-hero .btn-outline{background:transparent;color:#e8f0f8;border-color:rgba(255,255,255,.34)}
.page-hero .btn-outline:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.6)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.tag{
  display:inline-block;padding:4px 11px;border-radius:999px;
  font-size:12.5px;color:rgba(232,240,248,.78);
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.05);
}
.board-card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.16);
  border-radius:16px;
  padding:20px 20px 12px;
  box-shadow:0 24px 60px rgba(6,16,28,.4);
  min-width:0;
}
.board-head{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;letter-spacing:2px;color:#f0d8a8;
  padding-bottom:12px;margin-bottom:4px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.board-head em{font-style:normal;font-size:11.5px;letter-spacing:1px;color:rgba(232,240,248,.55)}
.board-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 0;font-size:14px;color:rgba(238,244,250,.92);
  border-bottom:1px dashed rgba(255,255,255,.1);
}
.board-row:last-child{border-bottom:0}
.board-row .val{
  flex:0 0 auto;font-size:12.5px;color:#f0d8a8;
  border:1px solid rgba(193,149,63,.42);
  background:rgba(193,149,63,.14);
  border-radius:999px;padding:2px 10px;white-space:nowrap;
}

/* ---------- sections ---------- */
.section{padding:var(--space) 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:34px}
.section-head .kicker{
  display:inline-block;font-size:12.5px;letter-spacing:2px;color:var(--gold);
  border-left:3px solid var(--gold);padding-left:10px;margin-bottom:12px;
}
.section-head h2{font-size:clamp(21px,2.4vw,28px);line-height:1.42;color:var(--navy);margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15px;line-height:1.92}

.kpi-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.kpi-card{
  min-width:0;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 22px 20px;
  box-shadow:var(--shadow-sm);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.kpi-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.kpi-num{font-size:12.5px;font-weight:700;letter-spacing:2px;color:var(--gold)}
.kpi-card h3{font-size:17px;color:var(--navy);margin:9px 0 10px;line-height:1.5}
.kpi-card p{color:var(--muted);font-size:14.4px;line-height:1.86}
.kpi-note{
  margin-top:15px;padding-top:12px;border-top:1px dashed var(--line);
  font-size:13px;color:#7b8899;line-height:1.7;
}

.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.scene-card{
  min-width:0;display:flex;gap:16px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.scene-idx{
  flex:0 0 auto;width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;font-size:15px;font-weight:700;
  color:var(--navy);background:var(--gold-soft);border:1px solid rgba(169,124,47,.28);
}
.scene-card h3{font-size:16.5px;color:var(--navy);margin-bottom:8px;line-height:1.5}
.scene-card p{color:var(--muted);font-size:14.4px;line-height:1.86}

.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.compare-panel{
  min-width:0;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);
}
.compare-panel.is-a{border-top:4px solid var(--ok)}
.compare-panel.is-b{border-top:4px solid var(--warn)}
.compare-panel h3{font-size:17.5px;color:var(--navy);margin-bottom:6px}
.compare-panel .panel-sub{font-size:13px;color:#7b8899;letter-spacing:.5px;margin-bottom:16px}
.compare-list li{
  position:relative;padding-left:20px;margin-bottom:12px;
  font-size:14.5px;line-height:1.86;color:#3a4857;
}
.compare-list li:last-child{margin-bottom:0}
.compare-list li::before{
  content:"";position:absolute;left:0;top:.68em;
  width:7px;height:7px;border-radius:2px;background:var(--gold-2);
}
.compare-panel.is-a .compare-list li::before{background:var(--ok)}
.compare-panel.is-b .compare-list li::before{background:var(--warn)}
.compare-foot{
  margin-top:24px;padding:18px 22px;border-radius:var(--radius);
  background:#fff;border:1px dashed var(--line-2);
  font-size:14.8px;line-height:1.9;color:#3a4857;
}

.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.step{
  min-width:0;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow-sm);
  transition:transform .24s ease,box-shadow .24s ease;
}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.step-num{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--gold-2),#96701f);
  color:#12253a;font-weight:800;font-size:15px;margin-bottom:14px;
}
.step h3{font-size:16.5px;color:var(--navy);margin-bottom:8px}
.step p{color:var(--muted);font-size:14.2px;line-height:1.84}

.checklist-tools{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-bottom:20px;font-size:14px;color:var(--muted);
}
.check-count{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line-2);
  color:var(--navy);font-weight:600;font-size:13.5px;
}
.check-count b{color:var(--gold);font-size:15px}
.checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.check-item{
  min-width:0;display:flex;gap:12px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:15px 17px;
  font-size:14.5px;line-height:1.82;color:#33414f;
  cursor:pointer;transition:border-color .2s ease,background .2s ease,box-shadow .2s ease;
}
.check-item:hover{border-color:var(--line-2);box-shadow:var(--shadow-sm)}
.check-item input{
  flex:0 0 auto;margin-top:5px;width:16px;height:16px;
  accent-color:#a97c2f;cursor:pointer;
}
.check-item:has(input:checked){background:#f2f8f5;border-color:rgba(47,122,91,.45)}

.risk-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.risk-card{
  min-width:0;background:var(--surface);border:1px solid var(--line);
  border-left:4px solid var(--warn);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm);
}
.risk-card h3{font-size:16.5px;color:var(--navy);margin-bottom:9px;line-height:1.5}
.risk-card .wrong{font-size:14px;color:#8a5a3f;margin-bottom:10px}
.risk-card p{font-size:14.4px;line-height:1.86;color:var(--muted)}

.faq-list{display:grid;gap:12px;max-width:920px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);
  border-radius:12px;overflow:hidden;box-shadow:var(--shadow-sm);
  transition:border-color .2s ease;
}
.faq-item:hover{border-color:var(--line-2)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 20px;cursor:pointer;list-style:none;
  font-size:15.6px;font-weight:600;color:var(--navy);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-size:20px;font-weight:400;
  color:var(--gold);line-height:1;
}
.faq-item[open] summary::after{content:"−"}
.faq-body{
  padding:14px 20px 18px;border-top:1px dashed var(--line);
  font-size:14.6px;line-height:1.9;color:var(--muted);
}

.download-band{
  background:linear-gradient(135deg,#132a44 0%,#1d3c5e 62%,#22456a 100%);
  border-radius:18px;
  padding:clamp(26px,3.6vw,42px);
  color:#eef2f7;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:clamp(22px,3vw,38px);
  align-items:center;
  box-shadow:0 24px 60px rgba(11,23,38,.22);
}
.download-band h2{font-size:clamp(20px,2.3vw,26px);color:#fff;margin-bottom:12px;line-height:1.42}
.download-band p{font-size:14.8px;line-height:1.9;color:rgba(232,240,248,.82)}
.dl-actions{display:grid;gap:12px}
.dl-btn{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 18px;border-radius:12px;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.2);
  color:#fff;font-weight:600;font-size:15px;
  transition:background .22s ease,border-color .22s ease,transform .22s ease,color .22s ease;
}
.dl-btn:hover{
  background:rgba(193,149,63,.2);border-color:rgba(193,149,63,.62);
  color:#fff;transform:translateX(3px);
}
.dl-btn .sys{font-size:12.5px;font-weight:400;color:rgba(232,240,248,.66)}
.dl-btn:hover .sys{color:rgba(240,216,168,.92)}

.closing{
  margin-top:26px;display:grid;grid-template-columns:minmax(0,1fr) auto;
  gap:18px;align-items:center;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow-sm);
}
.closing h3{font-size:17.5px;color:var(--navy);margin-bottom:7px}
.closing p{font-size:14.4px;color:var(--muted);line-height:1.86}

/* ---------- footer ---------- */
.site-footer{
  background:linear-gradient(180deg,#122740 0%,#0e1f33 100%);
  color:rgba(232,240,248,.72);
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:32px 28px;
}
.footer-brand .brand{color:#fff}
.footer-brand .brand:hover{opacity:.92}
.footer-brand p{
  margin-top:14px;font-size:14px;line-height:1.9;
  color:rgba(232,240,248,.66);max-width:430px;
}
.footer-col h4{font-size:14px;color:#fff;letter-spacing:1px;margin-bottom:14px}
.footer-col ul{display:grid;gap:9px}
.footer-col a{color:rgba(232,240,248,.7);font-size:14px}
.footer-col a:hover{color:#f0d8a8}
.footer-disclaimer{
  margin-top:34px;padding:16px 18px;border-radius:12px;
  border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.03);
  font-size:13px;line-height:1.92;color:rgba(232,240,248,.6);
}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:22px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:rgba(232,240,248,.5);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-columns{grid-template-columns:minmax(0,1fr)}
  .kpi-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-band{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .closing{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:768px){
  .header-inner{flex-wrap:wrap;padding:10px 0;gap:12px}
  .nav-toggle{display:inline-block}
  .site-nav{
    display:none;width:100%;order:5;margin-left:0;
    flex-direction:column;align-items:stretch;gap:2px;
    padding:10px 0 4px;border-top:1px solid rgba(255,255,255,.1);
  }
  .site-nav.open{display:flex}
  .site-nav .nav-link{padding:11px 12px;border-radius:8px}
  .header-actions{display:none}
  .scene-grid{grid-template-columns:minmax(0,1fr)}
  .compare-grid{grid-template-columns:minmax(0,1fr)}
  .checklist{grid-template-columns:minmax(0,1fr)}
  .risk-grid{grid-template-columns:minmax(0,1fr)}
  .section{padding:clamp(44px,8vw,64px) 0}
  .section-head{margin-bottom:26px}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .kpi-grid{grid-template-columns:minmax(0,1fr)}
  .steps{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .page-hero h1{font-size:22px}
  .hero-lead{font-size:14.8px}
  .board-card{padding:16px 16px 8px}
  .board-row{font-size:13.4px}
  .btn-solid,.btn-outline{width:100%;text-align:center}
  .hero-actions{gap:10px}
  .closing{padding:20px}
  .download-band{border-radius:14px}
}