/* roulang page: index */
:root{
  --bg-base:#070B14;
  --bg-raise:#0C1424;
  --bg-panel:#111B2E;
  --ink-1:#EAF2FF;
  --ink-2:#A9B8D0;
  --ink-3:#6C7C96;
  --line:rgba(150,180,220,.14);
  --brand:#2F8BFF;
  --accent:#FFA53B;
  --ok:#2FD2A8;
  --glow-brand:rgba(47,139,255,.45);
  --glow-accent:rgba(255,165,59,.42);
  --r-card:18px;
  --r-sm:12px;
  --r-btn:10px;
  --r-img:16px;
  --r-badge:8px;
  --sh-card:0 1px 0 rgba(255,255,255,.06) inset, 0 24px 48px -24px rgba(0,0,0,.7);
  --sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SF Mono",Consolas,"Roboto Mono",monospace;
  --sec:clamp(72px,8vw,128px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--ink-1);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(1200px 620px at 8% -12%,rgba(47,139,255,.12),transparent 62%),
    radial-gradient(900px 520px at 104% 34%,rgba(255,165,59,.08),transparent 60%),
    linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:auto,auto,24px 24px,24px 24px;
}
h1,h2,h3,h4,h5,h6,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none;transition:color 180ms cubic-bezier(.2,.7,.3,1)}
a:hover{color:var(--brand)}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input,select,textarea{font:inherit;color:var(--ink-1);width:100%}
strong{color:var(--ink-1);font-weight:600}
::selection{background:rgba(47,139,255,.35)}
.container{width:100%;max-width:1320px;margin:0 auto;padding-inline:32px}
@media (max-width:1023px){.container{padding-inline:24px}}
@media (max-width:639px){.container{padding-inline:20px}}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px}
.section{padding-block:var(--sec);position:relative}
.section--raise{background:linear-gradient(180deg,rgba(12,20,36,.72),rgba(7,11,20,0))}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-2);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-radius:var(--r-badge);
  padding:6px 12px;
  margin-bottom:20px;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok)}
h1,.h1{font-size:clamp(34px,4.4vw,56px);line-height:1.18;font-weight:700;letter-spacing:-.01em}
h2,.h2{font-size:clamp(26px,2.6vw,38px);line-height:1.24;font-weight:700;letter-spacing:-.005em}
h3,.h3{font-size:20px;line-height:1.35;font-weight:600}
.lead{color:var(--ink-2);font-size:16.5px;line-height:1.85}
.muted{color:var(--ink-3);font-size:14px;line-height:1.8}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head .desc{color:var(--ink-2);font-size:14px;margin-top:12px;max-width:640px}
.glass{
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sh-card);
}
@supports not ((backdrop-filter:blur(4px)) or (-webkit-backdrop-filter:blur(4px))){
  .glass{background:var(--bg-panel)}
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform 180ms cubic-bezier(.2,.7,.3,1),box-shadow 180ms cubic-bezier(.2,.7,.3,1),background-color 180ms cubic-bezier(.2,.7,.3,1),border-color 180ms cubic-bezier(.2,.7,.3,1),filter 180ms cubic-bezier(.2,.7,.3,1);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{
  background:linear-gradient(180deg,#FFBA68,#FFA53B);
  color:#22160A;
  box-shadow:0 0 0 1px rgba(255,255,255,.2) inset,0 14px 30px -14px var(--glow-accent);
}
.btn-primary:hover{color:#22160A;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,255,255,.24) inset,0 16px 34px -12px var(--glow-accent),0 0 0 6px rgba(255,165,59,.14)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,255,255,.18) inset}
.btn-ghost{
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  color:var(--ink-1);
}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(47,139,255,.3);color:var(--ink-1);transform:translateY(-1px)}
.btn-block{width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 4px var(--glow-brand);border-radius:var(--r-btn)}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
  border-radius:var(--r-badge);font-size:12.5px;font-weight:600;
  background:rgba(47,139,255,.14);color:#9CC8FF;border:1px solid rgba(47,139,255,.24)
}
.badge-accent{background:rgba(255,165,59,.14);color:#FFC888;border-color:rgba(255,165,59,.26)}
.badge-ok{background:rgba(47,210,168,.14);color:#8BEFD4;border-color:rgba(47,210,168,.26)}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  font-size:13px;color:var(--ink-2);background:rgba(255,255,255,.04);border:1px solid var(--line);
  transition:all 180ms cubic-bezier(.2,.7,.3,1);cursor:pointer;white-space:nowrap;
}
.chip:hover{color:var(--ink-1);border-color:rgba(47,139,255,.32);background:rgba(255,255,255,.07)}
.chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 20px -10px var(--glow-brand)}
.text-link{color:#9CC8FF;font-size:14px;display:inline-flex;align-items:center;gap:6px;font-weight:600}
.text-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,11,20,.72);
  border-bottom:1px solid transparent;
  transition:height 200ms cubic-bezier(.2,.7,.3,1),background-color 200ms,border-color 200ms,backdrop-filter 200ms;
}
.site-header.is-scrolled{background:rgba(7,11,20,.86);border-bottom-color:var(--line);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;transition:height 200ms cubic-bezier(.2,.7,.3,1)}
.site-header.is-scrolled .header-inner{height:56px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--brand),var(--accent));
  box-shadow:0 8px 18px -8px var(--glow-brand);
  position:relative;
}
.logo-mark::after{content:"";position:absolute;inset:6px;border-radius:3px;background:rgba(7,11,20,.72)}
.logo-text{font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:36px;padding:0 12px;border-radius:999px;
  font-size:15px;color:var(--ink-2);white-space:nowrap;
  transition:color 180ms,background-color 180ms;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-16px;transform:translateX(-50%);
  width:0;height:2px;background:var(--brand);transition:width 180ms cubic-bezier(.2,.7,.3,1);
  box-shadow:0 0 10px var(--glow-brand);
}
.nav-link:hover{color:var(--ink-1);background:rgba(255,255,255,.06)}
.nav-link:hover::after{width:22px}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{width:22px}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.command-search{
  display:flex;align-items:center;gap:8px;width:220px;height:40px;padding:0 10px 0 12px;
  border-radius:var(--r-sm);background:rgba(255,255,255,.045);border:1px solid var(--line);
  transition:border-color 180ms,background-color 180ms,box-shadow 180ms;
}
.command-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,139,255,.2)}
.command-search svg{flex:0 0 auto;color:var(--ink-3)}
.command-search input{flex:1 1 auto;border:0;background:transparent;height:100%;font-size:13.5px;padding:0;outline:none}
.command-search input::placeholder{color:var(--ink-3)}
.kbd-chip{
  flex:0 0 auto;font-family:var(--mono);font-size:11.5px;color:var(--ink-3);
  border:1px solid var(--line);border-radius:6px;padding:1px 6px;background:rgba(255,255,255,.04)
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;
  background:rgba(255,255,255,.045);border:1px solid var(--line);color:var(--ink-2);
  transition:all 180ms cubic-bezier(.2,.7,.3,1)
}
.icon-btn:hover{color:var(--ink-1);border-color:rgba(47,139,255,.34);background:rgba(255,255,255,.08);transform:translateY(-1px)}
.hamburger{display:none;width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line);align-items:center;justify-content:center;background:rgba(255,255,255,.045)}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink-1);border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-1);border-radius:2px}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:0 0 0 auto;width:min(88vw,360px);z-index:120;
  background:rgba(12,20,36,.94);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform 260ms cubic-bezier(.2,.7,.3,1);
  padding:24px 20px;display:flex;flex-direction:column;gap:16px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-mask{position:fixed;inset:0;z-index:110;background:rgba(4,7,13,.66);opacity:0;pointer-events:none;transition:opacity 260ms}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{display:flex;align-items:center;height:48px;padding:0 12px;border-radius:var(--r-sm);font-size:15.5px;color:var(--ink-2)}
.drawer-nav a.is-active{color:var(--brand);background:rgba(47,139,255,.12)}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px}

/* ---------- command palette ---------- */
.cmd-overlay{
  position:fixed;inset:0;z-index:140;display:flex;align-items:flex-start;justify-content:center;
  padding:14vh 20px 40px;background:rgba(4,7,13,.7);backdrop-filter:blur(6px);
  opacity:0;pointer-events:none;transition:opacity 200ms;
}
.cmd-overlay.is-open{opacity:1;pointer-events:auto}
.cmd-panel{width:min(640px,100%);padding:18px;border-radius:var(--r-card);transform:translateY(-8px);transition:transform 200ms cubic-bezier(.2,.7,.3,1)}
.cmd-overlay.is-open .cmd-panel{transform:translateY(0)}
.cmd-input-row{display:flex;align-items:center;gap:10px;height:48px;padding:0 14px;border-radius:var(--r-sm);background:rgba(255,255,255,.05);border:1px solid var(--line)}
.cmd-input-row input{border:0;background:transparent;height:100%;outline:none;font-size:15px}
.cmd-suggest{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.cmd-suggest a{display:flex;flex-direction:column;gap:2px;padding:12px 14px;border-radius:var(--r-sm);background:rgba(255,255,255,.035);border:1px solid transparent;transition:all 180ms}
.cmd-suggest a:hover{background:rgba(47,139,255,.1);border-color:rgba(47,139,255,.3)}
.cmd-suggest a span{font-size:14.5px;font-weight:600}
.cmd-suggest a em{font-style:normal;font-size:12.5px;color:var(--ink-3)}
.cmd-hint{margin-top:14px;font-size:12.5px;color:var(--ink-3);text-align:right}

/* ---------- hero ---------- */
.hero{position:relative;padding-block:clamp(56px,7vw,104px) clamp(64px,7vw,112px);overflow:hidden;min-height:88vh;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.11;z-index:0}
.hero-mask{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(7,11,20,.72),rgba(7,11,20,.94) 62%,var(--bg-base))}
.hero .container{position:relative;z-index:2}
.hero-sub{color:var(--ink-2);font-size:17px;line-height:1.8;margin-top:22px;max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-row{display:flex;flex-wrap:wrap;gap:28px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.trust-item{display:flex;flex-direction:column;gap:2px}
.trust-item b{font-family:var(--mono);font-size:19px;font-weight:600;color:var(--ink-1)}
.trust-item span{font-size:13px;color:var(--ink-3)}
.hero-panel{padding:28px;border-radius:var(--r-card)}
.panel-title{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-3);margin-bottom:18px}
.panel-main{display:flex;align-items:flex-end;gap:12px}
.panel-main b{font-family:var(--mono);font-size:44px;line-height:1;color:var(--ink-1)}
.panel-main em{font-style:normal;font-size:13px;color:var(--ok)}
.panel-sub{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}
.panel-sub div{padding:14px;border-radius:var(--r-sm);background:rgba(255,255,255,.04);border:1px solid var(--line)}
.panel-sub span{display:block;font-size:12.5px;color:var(--ink-3)}
.panel-sub b{font-family:var(--mono);font-size:18px;color:var(--ink-1)}
.mini-bar{margin-top:22px}
.mini-bar .track{height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden}
.mini-bar .fill{height:100%;width:78%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--accent))}
.mini-bar .cap{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-3);margin-top:8px}
.pulse{display:flex;align-items:center;gap:8px;margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-2)}
.pulse i{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(47,210,168,.5);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(47,210,168,.45)}70%{box-shadow:0 0 0 12px rgba(47,210,168,0)}100%{box-shadow:0 0 0 0 rgba(47,210,168,0)}}
@media (prefers-reduced-motion:reduce){.pulse i{animation:none}.btn,.card,.metric-card{transition:none}}

/* ---------- metric board ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.metric-card{position:relative;overflow:hidden;padding:24px;border-radius:var(--r-card)}
.metric-card::before{content:"";position:absolute;top:0;left:0;height:2px;width:100%;background:linear-gradient(90deg,var(--brand),var(--accent));transition:width 320ms cubic-bezier(.2,.7,.3,1)}
.metric-card:hover::before{width:112%}
.metric-card .name{font-size:14px;color:var(--ink-2)}
.metric-card .num{font-family:var(--mono);font-size:38px;line-height:1.1;font-weight:600;margin:12px 0 10px;color:var(--ink-1);transition:color 180ms}
.metric-card:hover .num{color:var(--brand)}
.metric-card .foot{font-size:12.5px;color:var(--ink-3);margin-top:12px}
.trend{display:inline-flex;align-items:center;gap:4px;font-size:12.5px;font-family:var(--mono)}
.trend-up{color:var(--ok)}
.trend-down{color:var(--accent)}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento-main{grid-column:span 6;grid-row:span 2;padding:0;overflow:hidden;display:flex;flex-direction:column;border-radius:var(--r-card)}
.bento-main img{width:100%;aspect-ratio:16/9;border-radius:0}
.bento-main .body{padding:26px 26px 28px;display:flex;flex-direction:column;gap:14px;flex:1}
.bento-main ul{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.bento-main ul li{position:relative;padding-left:20px;font-size:14.5px;color:var(--ink-2)}
.bento-main ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.bento-card{grid-column:span 3;padding:24px;border-radius:var(--r-card);display:flex;flex-direction:column;gap:12px;transition:transform 220ms cubic-bezier(.2,.7,.3,1),border-color 220ms,box-shadow 220ms}
.bento-card:hover{transform:translateY(-2px);border-color:rgba(120,170,255,.28)}
.icon-box{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(47,139,255,.12);border:1px solid rgba(47,139,255,.24);color:#9CC8FF}
.icon-box.accent{background:rgba(255,165,59,.12);border-color:rgba(255,165,59,.26);color:#FFC888}
.icon-box.ok{background:rgba(47,210,168,.12);border-color:rgba(47,210,168,.26);color:#8BEFD4}
.bento-card p{font-size:14px;color:var(--ink-2)}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:var(--ink-3);margin-top:auto}
.bento-card:hover .arrow-link{color:var(--brand)}

/* ---------- news ---------- */
.chips-row{display:flex;gap:10px;flex-wrap:wrap}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{border-radius:var(--r-card);overflow:hidden;display:flex;flex-direction:column;transition:transform 220ms cubic-bezier(.2,.7,.3,1),border-color 220ms}
.news-card:hover{transform:translateY(-2px);border-color:rgba(120,170,255,.28)}
.news-card.is-feature{grid-column:span 2;flex-direction:row}
.news-thumb{position:relative;overflow:hidden;border-radius:0}
.news-thumb img{width:100%;aspect-ratio:16/10;transition:transform 320ms cubic-bezier(.2,.7,.3,1)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-card.is-feature .news-thumb{flex:0 0 46%}
.news-card.is-feature .news-thumb img{height:100%;aspect-ratio:auto}
.news-thumb .badge{position:absolute;top:12px;left:12px;background:rgba(9,14,26,.7);backdrop-filter:blur(10px);color:#9CC8FF;border-color:rgba(150,180,220,.24)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-body h3{font-size:17px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-3);margin-top:auto;padding-top:12px;border-top:1px solid var(--line)}
.news-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-3)}
.news-meta .go{margin-left:auto;color:var(--brand)}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:56px 24px;border-radius:var(--r-card);border:1px dashed rgba(255,255,255,.18);
  color:var(--ink-2);font-size:14px;text-align:center;background:rgba(255,255,255,.02)
}
.empty-state svg{color:var(--ok)}

/* ---------- compare ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-col{padding:26px;border-radius:var(--r-card);position:relative;overflow:hidden}
.compare-col.after{border-color:rgba(47,139,255,.34)}
.compare-col.after::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--accent))}
.compare-col h3{margin-bottom:6px}
.compare-col .tag{font-size:12.5px;color:var(--ink-3);margin-bottom:20px;display:block}
.cmp-row{margin-bottom:18px}
.cmp-row .line{display:flex;justify-content:space-between;font-size:14px;color:var(--ink-2);margin-bottom:8px}
.cmp-row .line b{font-family:var(--mono);color:var(--ink-1)}
.track{height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden}
.bar-fill{height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--accent));transition:width 900ms cubic-bezier(.2,.7,.3,1)}
.compare-col.before .bar-fill{background:linear-gradient(90deg,rgba(150,180,220,.5),rgba(150,180,220,.28))}
.conclusion{margin-top:24px;padding:18px 22px;border-radius:var(--r-card);display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.conclusion p{font-size:14px;color:var(--ink-2)}
.conclusion .text-link{margin-left:auto}

/* ---------- faq ---------- */
.faq-aside h2{margin-bottom:12px}
.faq-aside .lead{font-size:15px;margin-bottom:20px}
.help-card{padding:20px;border-radius:var(--r-card);display:flex;flex-direction:column;gap:10px}
.help-card b{font-size:15px}
.faq-wrap .accordion{border:0;background:transparent;margin:0}
.faq-wrap .accordion-item{border:1px solid var(--line)!important;background:rgba(255,255,255,.045);border-radius:14px!important;margin-bottom:12px;overflow:hidden}
.faq-wrap .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:15.5px;font-weight:600;color:var(--ink-1);
  background:transparent!important;border:0!important;
}
.faq-wrap .accordion-title::before{display:none!important}
.faq-wrap .accordion-title::after{
  content:"+";font-family:var(--mono);font-size:20px;line-height:1;color:var(--brand);
  transition:transform 200ms cubic-bezier(.2,.7,.3,1);display:block;
}
.faq-wrap .accordion-title[aria-expanded="true"]::after{transform:rotate(45deg)}
.faq-wrap .accordion-title:hover{background:rgba(255,255,255,.03)!important}
.faq-wrap .accordion-content{border:0!important;background:transparent!important;padding:0 20px 18px!important;color:var(--ink-2);font-size:14.5px;line-height:1.8}

/* ---------- form ---------- */
.form-aside h2{margin-bottom:14px}
.check-list{display:flex;flex-direction:column;gap:12px;margin:22px 0}
.check-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2)}
.check-list svg{flex:0 0 auto;color:var(--ok);margin-top:5px}
.contact-line{display:flex;flex-wrap:wrap;gap:20px;font-size:14px;color:var(--ink-2);padding-top:20px;border-top:1px solid var(--line)}
.form-aside img{border-radius:var(--r-img);margin-top:24px;width:100%;aspect-ratio:16/9}
.form-card{padding:28px;border-radius:var(--r-card)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px}
.field input,.field select,.field textarea{
  height:47px;padding:0 14px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.05);border:1px solid var(--line);outline:none;
  transition:border-color 180ms,box-shadow 180ms,background-color 180ms;
}
.field textarea{height:auto;min-height:118px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,139,255,.2);background:rgba(255,255,255,.06)}
.field select option{background:var(--bg-panel);color:var(--ink-1)}
.field.is-error input,.field.is-error textarea{border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,165,59,.16)}
.field .err{display:none;font-size:12.5px;color:var(--accent);margin-top:6px}
.field.is-error .err{display:block}
.privacy-note{font-size:12.5px;color:var(--ink-3);margin-top:12px}
.form-msg{display:none;margin-top:14px;padding:12px 16px;border-radius:var(--r-sm);font-size:14px;background:rgba(47,210,168,.1);border:1px solid rgba(47,210,168,.28);color:#8BEFD4}
.form-msg.is-show{display:block}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(12,20,36,.7),rgba(7,11,20,1));margin-top:0;padding-top:64px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand p{font-size:14px;color:var(--ink-2);margin:16px 0 20px;max-width:340px}
.footer-social{display:flex;gap:12px}
.footer-social a{display:inline-flex;width:36px;height:36px;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--ink-2)}
.footer-social a:hover{color:var(--brand);border-color:rgba(47,139,255,.3);transform:translateY(-1px)}
.footer-col h4{font-size:14px;color:var(--ink-1);margin-bottom:16px;font-weight:600}
.footer-col ul{display:flex;flex-direction:column;gap:2px}
.footer-col a{font-size:14px;color:var(--ink-2);line-height:2}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 28px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--ink-3)}
.footer-bottom .right{margin-left:auto;display:flex;align-items:center;gap:16px}
.to-top{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;border-radius:var(--r-btn);border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--ink-2);font-size:13px}
.to-top:hover{color:var(--ink-1);border-color:rgba(47,139,255,.32)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .command-search{width:180px}
  .nav-link{padding:0 9px;font-size:14.5px}
}
@media (max-width:1023px){
  body{font-size:16px}
  .main-nav{display:none}
  .command-search{display:none}
  .hamburger{display:flex}
  .hero{min-height:auto}
  .metric-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .bento-main{grid-column:span 12;grid-row:auto}
  .bento-card{grid-column:span 6}
  .news-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .news-card.is-feature{grid-column:span 2;flex-direction:column}
  .news-card.is-feature .news-thumb{flex:auto}
  .news-card.is-feature .news-thumb img{aspect-ratio:16/9;height:auto}
  .compare{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section-head{margin-bottom:28px}
}
@media (max-width:767px){
  .header-actions .btn{display:none}
  .hero-cta .btn{width:100%}
  .trust-row{gap:20px}
  .news-grid{grid-template-columns:1fr}
  .news-card.is-feature{grid-column:span 1}
  .bento-card{grid-column:span 12}
  .form-card,.compare-col,.hero-panel{padding:22px}
}
@media (max-width:520px){
  body{font-size:16px}
  h3,.h3{font-size:18px}
  .metric-grid{grid-template-columns:1fr 1fr;gap:12px}
  .metric-card{padding:18px}
  .metric-card .num{font-size:28px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom .right{margin-left:0;width:100%}
}

/* roulang page: category1 */
:root{
  --bg-base:#070B14;
  --bg-raise:#0C1424;
  --bg-panel:#111B2E;
  --ink-1:#EAF2FF;
  --ink-2:#A9B8D0;
  --ink-3:#6C7C96;
  --line:rgba(150,180,220,.14);
  --line-strong:rgba(120,170,255,.28);
  --brand:#2F8BFF;
  --accent:#FFA53B;
  --ok:#2FD2A8;
  --glow-brand:rgba(47,139,255,.45);
  --glow-accent:rgba(255,165,59,.42);
  --r-card:18px;
  --r-sm:12px;
  --r-btn:10px;
  --r-img:16px;
  --r-badge:8px;
  --maxw:1320px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset,0 24px 48px -24px rgba(0,0,0,.7);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.87;
  color:var(--ink-1);
  background-color:var(--bg-base);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(900px 620px at 8% -6%, rgba(47,139,255,.12), transparent 62%),
    radial-gradient(820px 560px at 106% 104%, rgba(255,165,59,.08), transparent 62%),
    #070B14;
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.9;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(/%23n)' opacity='.035'/%3E%3C/svg%3E");
  background-size:24px 24px, 24px 24px, 140px 140px;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--ink-1);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.24;color:var(--ink-1);letter-spacing:.2px}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--ink-1)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;box-shadow:0 0 0 4px var(--glow-brand);border-radius:6px}
::selection{background:rgba(47,139,255,.35)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:32px;padding-right:32px}
.section{padding-block:clamp(72px,8vw,128px)}
.section--tight{padding-block:clamp(56px,6vw,88px)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:clamp(26px,2.6vw,38px)}
.section-head .sub{color:var(--ink-3);font-size:14px;margin-top:10px}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.6px;color:var(--ink-2);
  padding:6px 12px;border-radius:var(--r-badge);
  background:rgba(47,139,255,.10);
  border:1px solid rgba(47,139,255,.22);
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok)}

.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
  font-size:12.5px;border-radius:var(--r-badge);
  background:rgba(255,255,255,.06);border:1px solid var(--line);color:var(--ink-2);
}
.badge--accent{background:rgba(255,165,59,.14);border-color:rgba(255,165,59,.30);color:#FFD8A6}
.badge--ok{background:rgba(47,210,168,.12);border-color:rgba(47,210,168,.28);color:#9CF0DA}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.3px;
  transition:transform .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn-primary{
  background:var(--accent);color:#241503;
  box-shadow:0 0 0 1px rgba(255,255,255,.18) inset,0 10px 28px -10px var(--glow-accent);
}
.btn-primary:hover{
  background:#FFB45C;color:#241503;transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(255,255,255,.22) inset,0 14px 34px -8px var(--glow-accent);
}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,255,255,.12) inset}
.btn-ghost{
  background:rgba(255,255,255,.045);color:var(--ink-1);
  border:1px solid var(--line);
  backdrop-filter:blur(12px);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.08);color:var(--ink-1);
  border-color:rgba(47,139,255,.30);transform:translateY(-1px);
}
.btn-block{width:100%}
.btn-sm{height:38px;padding:0 16px;font-size:14px}

.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--brand)}
.link-arrow svg{transition:transform .18s var(--ease)}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px}
.link-arrow:hover svg{transform:translateX(3px)}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,20,.72);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease);
}
.site-header.is-scrolled{background:rgba(7,11,20,.9);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px;transition:height .22s var(--ease)}
.site-header.is-scrolled .header-inner{height:56px}

.logo{display:inline-flex;align-items:center;gap:10px;white-space:nowrap;font-weight:700}
.logo-mark{
  width:24px;height:24px;border-radius:7px;flex:none;
  background:linear-gradient(135deg,var(--brand),#7CC0FF 58%,var(--accent));
  box-shadow:0 0 0 1px rgba(255,255,255,.14) inset,0 8px 20px -8px var(--glow-brand);
}
.logo-text{font-size:17px;letter-spacing:.2px;color:var(--ink-1)}
.logo:hover .logo-text{color:#fff}

.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:36px;
  padding:0 12px;border-radius:9px;font-size:15px;color:var(--ink-2);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link:hover{color:var(--ink-1);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:#fff;background:rgba(47,139,255,.10)}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;box-shadow:0 0 10px var(--glow-brand);
}

.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.command-search{
  display:inline-flex;align-items:center;gap:8px;width:220px;height:38px;
  padding:0 10px;border-radius:10px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--ink-3);font-size:13.5px;text-align:left;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.command-search:hover{border-color:var(--line-strong);background:rgba(255,255,255,.07)}
.command-search .kbd{
  margin-left:auto;font-family:var(--font-mono);font-size:11px;
  padding:2px 6px;border-radius:6px;color:var(--ink-2);
  background:rgba(255,255,255,.07);border:1px solid var(--line);
}
.quick-entry{
  width:38px;height:38px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--ink-2);
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.quick-entry:hover{color:var(--brand);border-color:var(--line-strong);transform:translateY(-1px)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  align-items:center;justify-content:center;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--ink-1);
}

/* command palette */
.command-overlay{
  position:fixed;inset:0;z-index:90;display:none;
  background:rgba(4,8,16,.62);backdrop-filter:blur(8px);
}
.command-overlay.is-open{display:flex;align-items:flex-start;justify-content:center;padding:12vh 20px 20px}
.command-panel{
  width:min(560px,94vw);border-radius:var(--r-card);padding:18px;
  background:rgba(17,27,46,.92);border:1px solid var(--line);
  box-shadow:0 40px 80px -30px rgba(0,0,0,.85);
}
.command-panel input{
  width:100%;height:46px;padding:0 14px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.command-panel input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--glow-brand)}
.command-hint{font-size:12.5px;color:var(--ink-3);margin:12px 0 8px}
.command-item{
  display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:10px;
  font-size:14.5px;color:var(--ink-2);
}
.command-item:hover{background:rgba(255,255,255,.06);color:var(--ink-1)}
.command-item .esc{margin-left:auto;font-size:12px;color:var(--ink-3);font-family:var(--font-mono)}

/* mobile drawer */
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:95;width:min(340px,86vw);
  padding:20px;background:rgba(12,20,36,.96);
  backdrop-filter:blur(18px) saturate(140%);
  border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .26s var(--ease);
  display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.drawer .drawer-search{width:100%;height:44px;margin-bottom:8px}
.drawer .nav-link{height:48px;font-size:16px;padding:0 14px}
.drawer .btn{width:100%;margin-top:12px}
.drawer-scrim{position:fixed;inset:0;z-index:94;background:rgba(4,8,16,.6);display:none}
.drawer-scrim.is-open{display:block}
body.is-locked{overflow:hidden}

/* ============ Banner ============ */
.cat-banner{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.cat-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.10;
}
.cat-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.55) 0%,rgba(7,11,20,.86) 62%,rgba(7,11,20,.98) 100%);
}
.cat-banner .inner{position:relative;z-index:2;padding-block:clamp(72px,7vw,110px) clamp(56px,5vw,84px);min-height:440px;display:flex;flex-direction:column;justify-content:center}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(150,180,220,.4)}
.breadcrumb .current{color:var(--brand)}
.cat-banner h1{font-size:clamp(34px,4.4vw,56px);max-width:18ch;margin-bottom:20px}
.cat-banner .lead{max-width:62ch;font-size:16.5px;color:var(--ink-2);margin-bottom:32px}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;font-size:13px;
  border-radius:var(--r-badge);background:rgba(255,255,255,.05);
  border:1px solid var(--line);color:var(--ink-2);
}
.tag--brand{background:rgba(47,139,255,.14);border-color:rgba(47,139,255,.3);color:#B9DAFF}

/* ============ Zigzag ============ */
.zigzag{display:grid;gap:clamp(56px,6vw,92px)}
.zigzag-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,60px);align-items:center}
.zigzag-row.is-reverse .zigzag-media{order:2}
.zigzag-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.zigzag-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s var(--ease)}
.zigzag-media:hover img{transform:scale(1.03)}
.zigzag-body .idx{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:13px;color:var(--accent);letter-spacing:2px;margin-bottom:14px;display:block;
}
.zigzag-body h2{font-size:clamp(24px,2.2vw,32px);margin-bottom:16px}
.zigzag-body p{color:var(--ink-2);font-size:16px;line-height:1.88}
.mini-list{margin-top:22px;display:grid;gap:10px}
.mini-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink-2)}
.mini-list li .mark{
  width:6px;height:6px;border-radius:50%;background:var(--brand);
  margin-top:9px;flex:none;box-shadow:0 0 8px var(--glow-brand);
}

/* ============ Checklist ============ */
.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.check-card{
  display:flex;gap:16px;align-items:flex-start;padding:24px;
  border-radius:var(--r-sm);border:1px solid var(--line);
  background:rgba(255,255,255,.045);
  box-shadow:var(--shadow-card);
  transition:transform .18s var(--ease),border-color .18s var(--ease);
}
.check-card:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.check-card .tick{
  width:28px;height:28px;flex:none;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,210,168,.12);border:1px solid rgba(47,210,168,.32);color:var(--ok);
}
.check-card h3{font-size:17px;margin-bottom:6px}
.check-card p{font-size:14.5px;color:var(--ink-2);line-height:1.8}

/* ============ Stat strip ============ */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-radius:var(--r-card);border:1px solid var(--line);
  background:rgba(255,255,255,.045);
  backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.stat-cell{padding:28px 26px;border-right:1px solid var(--line)}
.stat-cell:last-child{border-right:none}
.stat-cell .name{font-size:14px;color:var(--ink-3);margin-bottom:10px}
.stat-cell .num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:30px;font-weight:700;color:var(--ink-1);letter-spacing:-.5px;
}
.stat-cell .num em{font-style:normal;font-size:15px;color:var(--ink-3);margin-left:6px;font-weight:400}
.stat-cell .note{font-size:12.5px;color:var(--ink-3);margin-top:8px}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:3fr 9fr;gap:clamp(28px,4vw,56px);align-items:start}
.faq-aside h2{font-size:clamp(26px,2.6vw,38px);margin-bottom:14px}
.faq-aside p{font-size:14.5px;color:var(--ink-3);line-height:1.85}
.faq-card{
  margin-top:24px;padding:20px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.045);border:1px solid var(--line);
}
.faq-card strong{display:block;font-size:15px;margin-bottom:6px}
.faq-card span{font-size:13.5px;color:var(--ink-2);line-height:1.8;display:block;margin-bottom:12px}

.faq-accordion{background:transparent;border:none;margin:0}
.faq-accordion .accordion-item{
  background:rgba(255,255,255,.045);border:1px solid var(--line);
  border-radius:14px;margin-bottom:12px;overflow:hidden;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.faq-accordion .accordion-item:hover{border-color:var(--line-strong)}
.faq-accordion .accordion-item.is-active{background:rgba(255,255,255,.06);border-color:var(--line-strong)}
.faq-accordion .accordion-title{
  position:relative;display:block;padding:18px 56px 18px 20px;
  font-size:15.5px;font-weight:600;color:var(--ink-1);
  background:transparent;border:none;line-height:1.55;
}
.faq-accordion .accordion-title::before{
  content:"+";position:absolute;right:20px;top:50%;
  transform:translateY(-50%);font-size:22px;font-weight:300;color:var(--accent);
  transition:transform .25s var(--ease);line-height:1;
}
.faq-accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg)}
.faq-accordion .accordion-content{
  padding:0 20px 20px;border:none;background:transparent;
  color:var(--ink-2);font-size:14.5px;line-height:1.82;
}
.faq-accordion .accordion-content p{margin:0}

/* ============ CTA strip ============ */
.cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:clamp(28px,3.4vw,44px);
  border-radius:var(--r-card);border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(47,139,255,.13),rgba(255,165,59,.09));
  box-shadow:var(--shadow-card);
  flex-wrap:wrap;
}
.cta-strip h2{font-size:clamp(22px,2.1vw,30px);margin-bottom:10px}
.cta-strip p{font-size:14.5px;color:var(--ink-2);max-width:62ch}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ Footer ============ */
.site-footer{border-top:1px solid var(--line);background:rgba(9,14,26,.9);padding-top:clamp(48px,5vw,72px);margin-top:clamp(56px,6vw,96px)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px}
.footer-brand p{font-size:14px;color:var(--ink-3);line-height:1.85;margin-top:16px;max-width:34ch}
.footer-social{display:flex;gap:12px;margin-top:18px}
.footer-social a{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--ink-2);
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.footer-social a:hover{color:var(--brand);border-color:var(--line-strong);transform:translateY(-1px)}
.footer-col h4{font-size:15px;margin-bottom:14px}
.footer-col ul{display:grid;gap:2px}
.footer-col a{font-size:14px;color:var(--ink-2);line-height:2}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  margin-top:clamp(36px,4vw,56px);padding:20px 0 26px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}
.footer-bottom .right{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--ink-2)}
.to-top:hover{color:var(--brand)}

/* ============ Responsive ============ */
@media screen and (max-width:1279px){
  .container{padding-left:24px;padding-right:24px}
}
@media screen and (max-width:1023px){
  .main-nav{display:none}
  .command-search{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions{gap:10px}
  .zigzag-row{grid-template-columns:1fr;gap:24px}
  .zigzag-row.is-reverse .zigzag-media{order:0}
  .zigzag-media img{aspect-ratio:16/9}
  .check-grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr 1fr}
  .stat-cell:nth-child(2){border-right:none}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line)}
  .faq-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media screen and (max-width:639px){
  body{font-size:16px}
  .container{padding-left:20px;padding-right:20px}
  .header-inner{height:60px;gap:12px}
  .logo-text{font-size:16px}
  .cat-banner .inner{min-height:0;padding-block:56px 48px}
  .cat-banner h1{max-width:100%}
  .btn{height:44px;padding:0 18px;font-size:14.5px}
  .banner-actions .btn{width:100%}
  .stat-strip{grid-template-columns:1fr}
  .stat-cell{border-right:none;border-bottom:1px solid var(--line)}
  .stat-cell:last-child{border-bottom:none}
  .stat-cell:nth-child(2){border-bottom:1px solid var(--line)}
  .check-card{padding:20px}
  .cta-strip{padding:24px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --bg-base:#070B14;
  --bg-raise:#0C1424;
  --bg-panel:#111B2E;
  --ink-1:#EAF2FF;
  --ink-2:#A9B8D0;
  --ink-3:#6C7C96;
  --line:rgba(150,180,220,.14);
  --brand:#2F8BFF;
  --accent:#FFA53B;
  --ok:#2FD2A8;
  --glow-brand:rgba(47,139,255,.45);
  --glow-accent:rgba(255,165,59,.42);
  --r-card:18px;
  --r-sm:12px;
  --r-btn:10px;
  --r-img:16px;
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset,0 24px 48px -24px rgba(0,0,0,.7);
  --glass:rgba(255,255,255,.045);
  --mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-1);
  background-color:var(--bg-base);
  background-image:
    radial-gradient(900px 620px at 6% -8%,rgba(47,139,255,.12),transparent 62%),
    radial-gradient(820px 620px at 102% 104%,rgba(255,165,59,.08),transparent 62%),
    linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:auto,auto,24px 24px,24px 24px;
  background-attachment:fixed;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:var(--ink-1);text-decoration:none;transition:color .18s cubic-bezier(.2,.7,.3,1)}
a:hover{color:var(--brand)}
p{margin:0 0 1.25em}
h1,h2,h3,h4{margin:0;line-height:1.22;font-weight:700;letter-spacing:-.01em}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 4px rgba(47,139,255,.28)}
::selection{background:rgba(47,139,255,.35)}
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 32px}
.section{padding-block:clamp(72px,8vw,128px)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  transition:background .22s ease,border-color .22s ease,backdrop-filter .22s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(7,11,20,.82);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:68px;transition:height .22s ease}
.site-header.is-stuck .nav-inner{height:56px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:24px;height:24px;border-radius:8px;
  background:linear-gradient(135deg,var(--brand),#7CC0FF 55%,var(--accent));
  box-shadow:0 0 18px rgba(47,139,255,.45);
}
.logo-text{font-weight:700;font-size:16.5px;color:var(--ink-1);white-space:nowrap;letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:12px}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;border-radius:10px;
  font-size:15px;color:var(--ink-2);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--ink-1);background:rgba(255,255,255,.06)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand)}
.nav-link.is-active::before{
  content:"";position:absolute;left:4px;top:50%;width:4px;height:4px;margin-top:-2px;
  border-radius:50%;background:var(--brand);
}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;width:220px;height:38px;padding:0 10px;
  border:1px solid var(--line);border-radius:var(--r-btn);
  background:rgba(255,255,255,.05);color:var(--ink-3);cursor:pointer;
  transition:border-color .18s ease,background .18s ease,box-shadow .18s ease;
}
.command-search:hover{border-color:rgba(120,170,255,.28);background:rgba(255,255,255,.07)}
.command-search .ph{flex:1;text-align:left;font-size:14px;color:var(--ink-3)}
.kbd{
  font-family:var(--mono);font-size:12px;padding:2px 6px;border-radius:6px;
  border:1px solid var(--line);background:rgba(255,255,255,.06);color:var(--ink-2);
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--ink-2);
  transition:border-color .18s ease,color .18s ease,transform .18s ease;
}
.icon-btn:hover{color:var(--ink-1);border-color:rgba(120,170,255,.3);transform:translateY(-1px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 20px;height:42px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .18s cubic-bezier(.2,.7,.3,1),background .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary{
  background:var(--accent);color:#181004;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28),0 10px 30px -12px var(--glow-accent);
}
.btn-primary:hover{background:#FFB355;color:#181004;transform:translateY(-1px);box-shadow:inset 0 0 0 1px rgba(255,255,255,.34),0 14px 34px -12px var(--glow-accent)}
.btn-primary:active{transform:translateY(1px);box-shadow:inset 0 0 0 1px rgba(255,255,255,.24)}
.btn-ghost{
  background:rgba(255,255,255,.05);border-color:var(--line);color:var(--ink-1);
}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(47,139,255,.3);color:var(--ink-1);transform:translateY(-1px)}
.btn-block{width:100%}
.hamburger{display:none}

/* 命令面板 */
.cmd-overlay{
  position:fixed;inset:0;z-index:120;display:none;
  background:rgba(4,7,13,.66);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.cmd-overlay.is-open{display:block}
.cmd-panel{
  width:min(620px,calc(100% - 40px));margin:96px auto 0;
  border-radius:var(--r-card);border:1px solid var(--line);
  background:rgba(17,27,46,.92);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.cmd-head{display:flex;align-items:center;gap:10px;padding:16px 18px;border-bottom:1px solid var(--line)}
.cmd-head input{flex:1;background:transparent;border:0;outline:none;font-size:15.5px;color:var(--ink-1)}
.cmd-list{list-style:none;margin:0;padding:8px}
.cmd-list a{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;font-size:15px;color:var(--ink-2)}
.cmd-list a:hover{background:rgba(255,255,255,.06);color:var(--ink-1)}
.cmd-list .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--glow-brand)}

/* 移动抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);z-index:130;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.2,.7,.3,1);
  background:rgba(12,20,36,.96);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--line);padding:20px;display:flex;flex-direction:column;gap:16px;overflow:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between}
.drawer nav{display:flex;flex-direction:column}
.drawer nav a{
  display:flex;align-items:center;height:48px;padding:0 10px;border-radius:12px;
  font-size:16px;color:var(--ink-2);border-bottom:1px solid rgba(150,180,220,.08);
}
.drawer nav a:hover,.drawer nav a.is-active{color:var(--ink-1);background:rgba(255,255,255,.05)}
.drawer-scrim{position:fixed;inset:0;z-index:125;background:rgba(4,7,13,.6);display:none}
.drawer-scrim.is-open{display:block}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding-top:104px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin:0}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(108,124,150,.6)}
.breadcrumb .current{color:var(--brand)}

/* ---------- 文章头部 ---------- */
.article-head{padding-top:22px;padding-bottom:26px}
.cat-label{
  display:inline-flex;align-items:center;gap:8px;height:24px;padding:0 10px;
  border-radius:8px;font-size:12.5px;color:var(--ink-1);
  background:rgba(47,139,255,.16);border:1px solid rgba(47,139,255,.32);
}
.cat-label .pulse{
  width:6px;height:6px;border-radius:50%;background:var(--ok);
  box-shadow:0 0 0 0 rgba(47,210,168,.55);animation:breathe 2.4s ease-in-out infinite;
}
@keyframes breathe{
  0%,100%{box-shadow:0 0 0 0 rgba(47,210,168,.45);opacity:1}
  50%{box-shadow:0 0 0 8px rgba(47,210,168,0);opacity:.7}
}
.article-head h1{
  margin:18px 0 0;font-size:clamp(34px,4.4vw,56px);
  line-height:1.2;letter-spacing:-.02em;max-width:18em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:20px;
  font-size:13px;color:var(--ink-3);
}
.article-meta .num{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink-2)}
.article-meta .dot-sep{width:4px;height:4px;border-radius:50%;background:rgba(150,180,220,.35)}

/* 封面 */
.article-cover{margin-top:28px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line)}
.article-cover img{width:100%;aspect-ratio:16/7;object-fit:cover}
.cover-caption{
  margin:12px 0 0;font-size:13px;color:var(--ink-3);text-align:center;
}

/* ---------- 阅读布局 ---------- */
.read-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:24px;align-items:start}
.article-panel{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:rgba(255,255,255,.045);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-card);
  padding:clamp(24px,3vw,40px);
}
@supports not (backdrop-filter:blur(2px)){
  .article-panel,.side-card,.glass-card{background:var(--bg-panel)}
}
.article-body{max-width:760px}
.article-body p{line-height:1.9;margin:0 0 1.25em;color:var(--ink-2)}
.article-body h2{
  position:relative;margin:2em 0 .8em;padding-left:16px;
  font-size:clamp(26px,2.6vw,38px);line-height:1.28;color:var(--ink-1);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--accent));
}
.article-body h3{margin:1.6em 0 .6em;font-size:20px;line-height:1.4;color:var(--ink-1)}
.article-body ul,.article-body ol{margin:0 0 1.25em;padding-left:1.4em;color:var(--ink-2)}
.article-body li{margin-bottom:.6em;line-height:1.85}
.article-body ul{list-style:none;padding-left:0}
.article-body ul li{position:relative;padding-left:22px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 10px var(--glow-brand);
}
.article-body ol{counter-reset:none}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;border-left:2px solid var(--brand);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:rgba(255,255,255,.045);color:var(--ink-2);
}
.article-body img{border-radius:var(--r-img);margin:1.6em auto}
.article-body code{
  font-family:var(--mono);font-size:.92em;padding:2px 7px;border-radius:6px;
  background:rgba(8,14,26,.9);border:1px solid var(--line);color:#9FD0FF;
}
.article-body pre{
  font-family:var(--mono);font-size:14px;line-height:1.7;color:#CFE2FF;
  background:rgba(8,14,26,.92);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:16px 18px;overflow:auto;margin:1.6em 0;
}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.article-body a:hover{color:#7CC0FF}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;color:var(--ink-2)}
.article-body th{background:rgba(255,255,255,.05);color:var(--ink-1)}

/* 空态 */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  text-align:center;padding:56px 24px;border:1px dashed rgba(255,255,255,.18);border-radius:var(--r-card);
}
.empty-state svg{color:var(--ok)}
.empty-state h2{font-size:22px;color:var(--ink-1)}
.empty-state p{font-size:14.5px;color:var(--ink-3);margin:0;max-width:32em}

/* 标签行 */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:8px;
  font-size:13px;color:var(--ink-2);border:1px solid var(--line);background:rgba(255,255,255,.05);
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.chip:hover{border-color:rgba(47,139,255,.32);color:var(--ink-1);background:rgba(255,255,255,.08)}
.chip.is-accent{border-color:rgba(255,165,59,.34);color:#FFC784;background:rgba(255,165,59,.1)}

/* 上一篇 / 下一篇 */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px}
.pager-card{
  display:block;padding:18px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:rgba(255,255,255,.04);transition:transform .18s ease,border-color .18s ease;
}
.pager-card:hover{transform:translateY(-2px);border-color:rgba(120,170,255,.28);color:var(--ink-1)}
.pager-card .k{display:block;font-size:12.5px;color:var(--ink-3);margin-bottom:6px}
.pager-card .t{display:block;font-size:15.5px;font-weight:600;color:var(--ink-1);line-height:1.5}
.pager-card.right{text-align:right}

/* 相关推荐 */
.related{margin-top:44px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:20px}
.sec-head h2{font-size:clamp(22px,2.2vw,28px)}
.sec-head .more{font-size:14px;color:var(--brand)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rel-card{
  display:flex;flex-direction:column;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:rgba(255,255,255,.045);
  box-shadow:var(--shadow-card);transition:transform .2s ease,border-color .2s ease;
}
.rel-card:hover{transform:translateY(-2px);border-color:rgba(120,170,255,.28)}
.rel-card .thumb{overflow:hidden;aspect-ratio:16/10}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.rel-card:hover .thumb img{transform:scale(1.03)}
.rel-card .body{padding:18px}
.rel-card h3{font-size:17px;line-height:1.5;color:var(--ink-1)}
.rel-card p{margin:8px 0 0;font-size:14px;color:var(--ink-3);line-height:1.7}
.rel-card .foot{
  margin-top:14px;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--ink-3);
}
.rel-card .foot .num{font-family:var(--mono);color:var(--ink-2)}
.rel-card .foot .arrow{margin-left:auto;color:var(--brand)}

/* 返回列表 */
.back-row{margin-top:32px;display:flex;justify-content:center}
.back-link{
  display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:rgba(255,255,255,.05);font-size:14.5px;color:var(--ink-2);
}
.back-link:hover{color:var(--ink-1);border-color:rgba(47,139,255,.3);background:rgba(255,255,255,.08)}

/* ---------- 侧栏 ---------- */
.read-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:92px}
.side-card{
  border:1px solid var(--line);border-radius:var(--r-card);padding:22px;
  background:rgba(255,255,255,.045);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--shadow-card);
}
.side-card h3{font-size:15.5px;color:var(--ink-1);margin-bottom:14px}
.side-card ul{list-style:none;margin:0;padding:0}
.side-card li{display:flex;gap:10px;padding:10px 0;border-bottom:1px solid rgba(150,180,220,.09);font-size:14px;color:var(--ink-2)}
.side-card li:last-child{border-bottom:0;padding-bottom:0}
.side-card li .idx{
  font-family:var(--mono);font-size:12.5px;color:var(--accent);min-width:20px;
}
.side-card li a{color:var(--ink-2)}
.side-card li a:hover{color:var(--brand)}
.side-card.hot li{justify-content:space-between;align-items:center}
.side-card.hot .heat{
  font-family:var(--mono);font-size:12px;color:#FFC784;padding:2px 8px;border-radius:8px;
  background:rgba(255,165,59,.12);border:1px solid rgba(255,165,59,.25);
}
.side-cta p{font-size:14px;color:var(--ink-3);margin:0 0 16px}
.side-stat{display:flex;gap:18px;margin-bottom:16px}
.side-stat div{flex:1}
.side-stat .v{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:22px;color:var(--ink-1)}
.side-stat .k{font-size:12.5px;color:var(--ink-3)}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:rgba(9,14,25,.7);margin-top:clamp(72px,8vw,128px)}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;
  padding:clamp(48px,6vw,72px) 0 40px;
}
.footer-brand p{font-size:14px;color:var(--ink-3);max-width:34em;margin:16px 0 18px;line-height:1.8}
.footer-social{display:flex;gap:10px}
.footer-social a{
  display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--ink-2);
}
.footer-social a:hover{color:var(--brand);border-color:rgba(47,139,255,.3)}
.footer-col h4{font-size:14px;color:var(--ink-1);margin-bottom:14px;font-weight:600}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:6px}
.footer-col a{font-size:14px;color:var(--ink-3);line-height:2}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);padding:20px 0 32px;font-size:13px;color:var(--ink-3);
}
.footer-bottom .right{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.to-top{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-2)}
.to-top:hover{color:var(--brand)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 24px}
  .main-nav,.command-search{display:none}
  .hamburger{display:inline-flex}
  .read-grid{grid-template-columns:1fr}
  .read-side{position:static;margin-top:24px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .crumb-bar{padding-top:96px}
}
@media (max-width:639px){
  body{font-size:16px}
  .container{padding:0 20px}
  .nav-inner{height:60px}
  .logo-text{font-size:15.5px}
  .article-head h1{max-width:none}
  .rel-grid{grid-template-columns:1fr}
  .pager{grid-template-columns:1fr}
  .pager-card.right{text-align:left}
  .article-cover img{aspect-ratio:16/10}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .sec-head{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
/* ==================== 设计变量 ==================== */
:root{
  --bg-base:#070B14;
  --bg-raise:#0C1424;
  --bg-panel:#111B2E;
  --ink-1:#EAF2FF;
  --ink-2:#A9B8D0;
  --ink-3:#6C7C96;
  --line:rgba(150,180,220,.14);
  --line-strong:rgba(120,170,255,.28);
  --brand:#2F8BFF;
  --accent:#FFA53B;
  --ok:#2FD2A8;
  --glow-brand:rgba(47,139,255,.45);
  --glow-accent:rgba(255,165,59,.42);
  --glass:rgba(255,255,255,.045);
  --glass-hover:rgba(255,255,255,.08);
  --radius-card:18px;
  --radius-sm:12px;
  --radius-btn:10px;
  --radius-img:16px;
  --radius-badge:8px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.06), 0 24px 48px -24px rgba(0,0,0,.7);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SF Mono",Consolas,monospace;
  --container:1320px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ==================== 基础重置 ==================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--bg-base);
  color:var(--ink-1);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(900px 620px at 6% -8%, rgba(47,139,255,.12), transparent 62%),
    radial-gradient(780px 560px at 104% 106%, rgba(255,165,59,.08), transparent 60%),
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(/%23n)' opacity='0.03'/%3E%3C/svg%3E");
  background-size:100% 100%,100% 100%,24px 24px,24px 24px,140px 140px;
  background-repeat:no-repeat,no-repeat,repeat,repeat,repeat;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color 180ms var(--ease),border-color 180ms var(--ease),background-color 180ms var(--ease)}
a:hover{color:var(--brand)}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 4px var(--glow-brand);border-radius:6px}
.site-header,.site-main,.site-footer{position:relative;z-index:1}

/* ==================== 容器 ==================== */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:32px}
.section{padding-block:clamp(72px,8vw,128px)}
.section-tight{padding-block:clamp(48px,6vw,88px)}
.grid-gap-x{margin-inline:-12px}
.grid-gap-x > .cell{padding-inline:12px;margin-bottom:24px}

/* ==================== 通用排版组件 ==================== */
h1{font-size:clamp(34px,4.4vw,56px);line-height:1.2;font-weight:700;letter-spacing:-.5px}
h2{font-size:clamp(26px,2.6vw,38px);line-height:1.24;font-weight:700;letter-spacing:-.3px}
h3{font-size:20px;line-height:1.35;font-weight:600}
p{color:var(--ink-2)}
.lead{font-size:17px;line-height:1.8}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:28px;padding:0 12px;border-radius:var(--radius-badge);
  background:rgba(47,139,255,.12);
  border:1px solid rgba(47,139,255,.28);
  color:#9CC8FF;font-size:13px;letter-spacing:.4px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(47,139,255,.16)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{margin:16px 0 14px}
.section-head p{font-size:15.5px}
.section-head.center{margin-inline:auto;text-align:center}
.section-head.center .eyebrow{justify-content:center}
.divider{height:1px;background:var(--line);border:0;margin:0}

.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 9px;
  border-radius:var(--radius-badge);font-size:12.5px;line-height:1;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
}
.badge.is-brand{background:rgba(47,139,255,.14);border-color:rgba(47,139,255,.3);color:#9CC8FF}
.badge.is-ok{background:rgba(47,210,168,.13);border-color:rgba(47,210,168,.3);color:#7BE6CB}
.badge.is-accent{background:rgba(255,165,59,.14);border-color:rgba(255,165,59,.32);color:#FFC983}

.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--radius-badge);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  font-size:13px;color:var(--ink-2);transition:all 180ms var(--ease);
}
.tag:hover{background:rgba(47,139,255,.12);border-color:var(--line-strong);color:var(--ink-1)}

/* ==================== 按钮 ==================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform 180ms var(--ease),background-color 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);
}
.btn svg{flex:none}
.btn-primary{
  background:var(--accent);
  color:#12100B;
  border:1px solid rgba(255,255,255,.22);
  box-shadow:0 0 0 0 var(--glow-accent),0 12px 28px -14px rgba(255,165,59,.6);
}
.btn-primary:hover{
  background:#FFB157;color:#12100B;transform:translateY(-1px);
  box-shadow:0 0 0 4px rgba(255,165,59,.18),0 16px 34px -14px rgba(255,165,59,.7);
}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);
}
.btn-ghost:hover{background:var(--glass-hover);border-color:var(--line-strong);color:var(--ink-1)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}
.text-link{color:#9CC8FF;font-size:14.5px;display:inline-flex;align-items:center;gap:6px}
.text-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}

/* ==================== 玻璃卡 ==================== */
.glass-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-card);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),background-color 220ms var(--ease);
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .glass-card{background:#111B2E}
}

/* ==================== 导航 ==================== */
.site-header{
  position:sticky;top:0;z-index:60;
  height:68px;
  display:flex;align-items:center;
  transition:height 220ms var(--ease),background-color 220ms var(--ease),border-color 220ms var(--ease),backdrop-filter 220ms var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  height:56px;
  background:rgba(7,11,20,.82);
  backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{
  width:24px;height:24px;border-radius:7px;flex:none;
  background:linear-gradient(135deg,var(--brand),#1E63C4 55%,var(--accent));
  box-shadow:0 0 0 1px rgba(255,255,255,.14) inset,0 6px 18px -8px var(--glow-brand);
}
.logo-text{font-size:16.5px;font-weight:700;letter-spacing:-.2px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.main-nav .nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:34px;padding:0 12px;border-radius:8px;
  font-size:15px;color:var(--ink-2);
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-11px;height:2px;
  background:var(--brand);border-radius:2px;opacity:0;transform:scaleX(.4);
  transition:opacity 180ms var(--ease),transform 180ms var(--ease);
}
.main-nav .nav-link:hover{background:rgba(255,255,255,.06);color:var(--ink-1)}
.main-nav .nav-link:hover::after{opacity:.55;transform:scaleX(1)}
.main-nav .nav-link.is-active{color:var(--brand);font-weight:600}
.main-nav .nav-link.is-active::after{opacity:1;transform:scaleX(1)}
.main-nav .nav-link.is-active::before{
  content:"";position:absolute;left:3px;top:50%;width:5px;height:5px;margin-top:-2.5px;border-radius:50%;background:var(--brand);
}
.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-trigger{
  display:flex;align-items:center;gap:8px;width:220px;height:38px;padding:0 10px;
  border-radius:var(--radius-btn);background:rgba(255,255,255,.04);
  border:1px solid var(--line);color:var(--ink-3);font-size:14px;
  transition:border-color 180ms var(--ease),background-color 180ms var(--ease);
}
.search-trigger:hover{border-color:var(--line-strong);background:rgba(255,255,255,.06);color:var(--ink-2)}
.search-trigger span{flex:1;text-align:left}
.search-trigger kbd{
  font-family:var(--font-mono);font-size:11.5px;color:var(--ink-3);
  padding:2px 6px;border-radius:6px;background:rgba(255,255,255,.06);border:1px solid var(--line);
}
.tool-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
}
.tool-icon:hover{color:var(--brand);border-color:var(--line-strong);background:var(--glass-hover)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--line-strong)}

/* 搜索面板 */
.search-panel{
  position:fixed;inset:0;z-index:90;display:none;
  background:rgba(5,8,14,.72);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  padding:12vh 20px 40px;
}
.search-panel.is-open{display:block;animation:fadeIn 200ms var(--ease)}
.search-box{
  max-width:640px;margin-inline:auto;background:var(--bg-panel);
  border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.search-box .search-field{
  display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--line);
}
.search-box input{
  flex:1;height:34px;background:transparent;border:0;outline:none;font-size:16px;color:var(--ink-1);
}
.search-box input::placeholder{color:var(--ink-3)}
.search-suggests{padding:10px}
.search-suggests a{
  display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:10px;font-size:14.5px;color:var(--ink-2);
}
.search-suggests a:hover{background:rgba(255,255,255,.06);color:var(--ink-1)}
.search-suggests a em{font-style:normal;color:var(--ink-3);font-size:13px;margin-left:auto}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:95;display:none;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer::before{
  content:"";position:absolute;inset:0;background:rgba(5,8,14,.7);backdrop-filter:blur(8px);
}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(360px,86vw);
  background:rgba(12,20,36,.96);
  border-left:1px solid var(--line);
  backdrop-filter:blur(20px) saturate(150%);
  -webkit-backdrop-filter:blur(20px) saturate(150%);
  display:flex;flex-direction:column;gap:20px;
  padding:20px;overflow-y:auto;
  animation:slideIn 260ms var(--ease);
}
@keyframes slideIn{from{transform:translateX(24px);opacity:.6}to{transform:none;opacity:1}}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--glass);color:var(--ink-2);font-size:18px;line-height:1}
.drawer-nav{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-block:12px}
.drawer-nav .nav-link{
  display:flex;align-items:center;height:48px;padding:0 12px;border-radius:10px;
  font-size:15.5px;color:var(--ink-2);
}
.drawer-nav .nav-link:hover,.drawer-nav .nav-link.is-active{background:rgba(47,139,255,.12);color:#9CC8FF}
body.nav-locked{overflow:hidden}

/* ==================== 分类横幅 ==================== */
.page-banner{
  position:relative;
  padding-block:clamp(72px,8vw,128px) clamp(56px,6vw,96px);
  background-image:linear-gradient(180deg,rgba(7,11,20,.55) 0%,rgba(7,11,20,.94) 62%,var(--bg-base) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-banner::after{
  content:"";position:absolute;left:50%;top:-120px;width:760px;height:420px;transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(47,139,255,.22),transparent 78%);
  pointer-events:none;
}
.banner-inner{position:relative;z-index:1;max-width:840px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:20px}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(150,180,220,.4)}
.breadcrumb .current{color:var(--brand)}
.page-banner h1{margin-bottom:18px}
.banner-lead{font-size:17px;max-width:620px;margin-bottom:28px}
.banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}
.banner-meta{display:flex;flex-wrap:wrap;gap:24px;align-items:center;font-size:13px;color:var(--ink-3)}
.banner-meta strong{display:block;font-family:var(--font-mono);font-size:22px;color:var(--ink-1);font-weight:600;line-height:1.3}

/* ==================== 时间轴 ==================== */
.timeline{position:relative;padding-top:8px}
.timeline::before{
  content:"";position:absolute;left:23px;top:16px;bottom:16px;width:1px;
  background:linear-gradient(180deg,rgba(47,139,255,.55),rgba(150,180,220,.14) 62%,rgba(47,210,168,.35));
}
.tl-item{position:relative;padding-left:84px;margin-bottom:24px}
.tl-item:last-child{margin-bottom:0}
.tl-marker{
  position:absolute;left:0;top:22px;width:48px;height:48px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-panel);border:1px solid var(--line);
  font-family:var(--font-mono);font-size:13px;color:var(--brand);
  font-variant-numeric:tabular-nums;
  box-shadow:0 0 0 6px rgba(7,11,20,.9);
}
.tl-item.is-final .tl-marker{color:var(--ok);border-color:rgba(47,210,168,.32)}
.tl-card{padding:26px 28px}
.tl-card:hover{border-color:var(--line-strong);background:var(--glass-hover);transform:translateY(-2px)}
.tl-card h3{margin-bottom:10px}
.tl-card > p{font-size:15px;margin-bottom:16px}
.tl-points{display:flex;flex-wrap:wrap;gap:8px}
.tl-points li{
  display:inline-flex;align-items:center;gap:6px;
  height:30px;padding:0 12px;border-radius:8px;font-size:13px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--ink-2);
}
.tl-points li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand)}
.tl-item.is-final .tl-points li::before{background:var(--ok)}

/* ==================== 通栏宽卡 ==================== */
.wide-card{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  align-items:stretch;gap:0;overflow:hidden;margin-bottom:32px;
}
.wide-card:last-child{margin-bottom:0}
.wide-card.is-reverse .wide-media{order:2}
.wide-media{position:relative;min-height:300px;overflow:hidden}
.wide-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.wide-card:hover .wide-media img{transform:scale(1.04)}
.wide-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.12),rgba(7,11,20,.52));
}
.wide-body{padding:clamp(28px,3.4vw,44px);display:flex;flex-direction:column;justify-content:center;gap:16px}
.wide-body h3{font-size:22px}
.wide-body p{font-size:15px}
.wide-list{display:grid;gap:10px;margin-top:2px}
.wide-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);align-items:flex-start}
.wide-list li svg{flex:none;margin-top:5px;color:var(--ok)}
.wide-body .text-link{margin-top:6px}

/* ==================== FAQ ==================== */
.faq-side h2{margin-bottom:14px}
.faq-side p{font-size:15px;margin-bottom:22px}
.faq-help{padding:20px;border-radius:var(--radius-sm);background:var(--glass);border:1px solid var(--line)}
.faq-help strong{display:block;font-size:15px;margin-bottom:6px}
.faq-help p{font-size:13.5px;margin-bottom:14px}
.faq-accordion{background:transparent;border:0;margin:0;padding:0;list-style:none}
.faq-accordion .accordion-item{
  background:var(--glass);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  transition:border-color 200ms var(--ease),background-color 200ms var(--ease);
}
.faq-accordion .accordion-item:hover{border-color:var(--line-strong)}
.faq-accordion .accordion-item.is-active{background:rgba(255,255,255,.07);border-color:var(--line-strong)}
.faq-accordion .accordion-title{
  position:relative;display:block;padding:18px 56px 18px 20px;
  font-size:15.5px;font-weight:600;color:var(--ink-1);
  background:transparent;border:0;line-height:1.5;
}
.faq-accordion .accordion-title:hover{color:var(--brand)}
.faq-accordion .accordion-title::before,
.faq-accordion .accordion-title::after{
  content:"";position:absolute;right:22px;top:50%;background:var(--brand);border-radius:2px;
  transition:transform 220ms var(--ease),opacity 220ms var(--ease);
}
.faq-accordion .accordion-title::before{width:13px;height:1.8px;transform:translateY(-50%)}
.faq-accordion .accordion-title::after{width:1.8px;height:13px;transform:translateY(-50%) rotate(0deg)}
.faq-accordion .accordion-item.is-active .accordion-title::after{transform:translateY(-50%) rotate(90deg);opacity:0}
.faq-accordion .accordion-content{
  padding:0 20px 20px;border:0;background:transparent;
  color:var(--ink-2);font-size:14.5px;line-height:1.8;
}
.faq-accordion .accordion-content p{font-size:14.5px;color:var(--ink-2)}
.faq-accordion .accordion-content p + p{margin-top:10px}

/* ==================== 表单 ==================== */
.contact-aside h2{margin-bottom:16px}
.check-list{display:grid;gap:12px;margin-bottom:24px}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink-2)}
.check-list li svg{flex:none;margin-top:5px;color:var(--accent)}
.contact-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--ink-3);margin-bottom:20px}
.contact-figure{border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line)}
.contact-figure img{width:100%;height:220px;object-fit:cover}
.contact-form{padding:clamp(24px,3vw,36px)}
.form-row{margin-bottom:18px}
.form-row label{display:block;font-size:13px;color:var(--ink-3);margin-bottom:8px;letter-spacing:.3px}
.form-row input[type="text"],
.form-row input[type="tel"],
.form-row textarea{
  width:100%;background:rgba(255,255,255,.05);border:1px solid var(--line);
  border-radius:var(--radius-sm);color:var(--ink-1);font-size:15px;
  padding:0 14px;height:46px;transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease),background-color 180ms var(--ease);
  outline:none;
}
.form-row textarea{height:auto;min-height:112px;padding:12px 14px;line-height:1.75;resize:vertical}
.form-row input:focus,.form-row textarea:focus{
  border-color:var(--brand);background:rgba(47,139,255,.06);
  box-shadow:0 0 0 3px rgba(47,139,255,.22);
}
.form-row input::placeholder,.form-row textarea::placeholder{color:#5A6A83}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip-input{position:absolute;opacity:0;pointer-events:none}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:9px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  font-size:14px;color:var(--ink-2);cursor:pointer;
  transition:all 180ms var(--ease);
}
.chip:hover{border-color:var(--line-strong);color:var(--ink-1)}
.chip-input:checked + .chip{background:rgba(255,165,59,.16);border-color:rgba(255,165,59,.45);color:#FFCB8C}
.chip-input:focus-visible + .chip{outline:2px solid var(--brand);outline-offset:2px}
.form-note{font-size:12.5px;color:var(--ink-3);margin-top:12px;line-height:1.7}
.form-feedback{margin-top:14px;padding:12px 14px;border-radius:var(--radius-sm);background:var(--glass);border:1px solid var(--line);font-size:13.5px;color:var(--ink-2);display:none}
.form-feedback.is-visible{display:block}

/* ==================== 页脚 ==================== */
.site-footer{
  margin-top:0;
  background:linear-gradient(180deg,rgba(12,20,36,.5),rgba(7,11,20,1));
  border-top:1px solid var(--line);
  padding-block:clamp(48px,5vw,72px) 0;
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;
  padding-bottom:40px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;max-width:340px;margin-bottom:18px}
.footer-social{display:flex;gap:12px}
.footer-social a{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
}
.footer-social a:hover{color:var(--brand);border-color:var(--line-strong);background:var(--glass-hover)}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--ink-1);letter-spacing:.3px}
.footer-col ul li{margin-bottom:2px}
.footer-col ul a{font-size:14px;line-height:2;color:var(--ink-2)}
.footer-col ul a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding-block:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);
}
.footer-bottom .right{display:flex;align-items:center;gap:20px}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--ink-2)}
.to-top:hover{color:var(--brand)}

/* ==================== 动效与响应式 ==================== */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

@media screen and (max-width:1023px){
  .container{padding-inline:24px}
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .search-trigger{width:170px}
  .wide-card{grid-template-columns:1fr}
  .wide-card.is-reverse .wide-media{order:0}
  .wide-media{min-height:240px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
}

@media screen and (max-width:767px){
  body{font-size:16px}
  .container{padding-inline:20px}
  .search-trigger{display:none}
  .header-tools .tool-icon{display:none}
  .tl-item{padding-left:66px}
  .tl-marker{width:40px;height:40px;border-radius:12px;font-size:12px;top:20px}
  .timeline::before{left:19px}
  .tl-card{padding:22px 20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

@media screen and (max-width:520px){
  .banner-actions .btn{width:100%}
  .banner-meta{gap:18px}
  .header-tools .btn-primary{display:none}
  .tl-item{padding-left:56px}
  .tl-marker{width:34px;height:34px;font-size:11px;border-radius:10px}
  .timeline::before{left:16px}
  .contact-form{padding:20px}
}

/* roulang page: category3 */
:root{
  --bg-base:#070B14;
  --bg-raise:#0C1424;
  --bg-panel:#111B2E;
  --ink-1:#EAF2FF;
  --ink-2:#A9B8D0;
  --ink-3:#6C7C96;
  --line:rgba(150,180,220,.14);
  --line-strong:rgba(120,170,255,.28);
  --brand:#2F8BFF;
  --accent:#FFA53B;
  --ok:#2FD2A8;
  --glow-brand:rgba(47,139,255,.45);
  --glow-accent:rgba(255,165,59,.42);
  --r-card:18px;
  --r-sm:12px;
  --r-btn:10px;
  --r-img:16px;
  --r-badge:8px;
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset, 0 24px 48px -24px rgba(0,0,0,.7);
  --sec-pad:clamp(72px,8vw,128px);
  --container:1320px;
  --header-h:68px;
  --font-cn:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:var(--header-h);
  background-color:var(--bg-base);
  color:var(--ink-1);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 600px at 8% -6%, rgba(47,139,255,.12), transparent 62%),
    radial-gradient(820px 620px at 96% 108%, rgba(255,165,59,.08), transparent 60%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:24px 24px;
}
body.is-locked{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,text-decoration-color .18s ease;}
a:hover{color:#7DB6FF;text-decoration:underline;text-underline-offset:4px;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.24;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 4px var(--glow-brand);}

.container{
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding-inline:32px;
  position:relative;
  z-index:1;
}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
.section{padding-block:var(--sec-pad);position:relative;z-index:1;}
.section-head{margin-bottom:40px;max-width:760px;}
.section-head--split{display:flex;flex-wrap:wrap;gap:24px;align-items:flex-end;justify-content:space-between;max-width:none;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:24px;padding:0 10px;border-radius:var(--r-badge);
  background:rgba(47,139,255,.12);border:1px solid rgba(47,139,255,.3);
  color:#9CC9FF;font-size:13px;line-height:1;margin-bottom:18px;
}
.eyebrow--accent{background:rgba(255,165,59,.12);border-color:rgba(255,165,59,.32);color:#FFC982;}
h1{font-size:clamp(34px,4.4vw,56px);line-height:1.16;}
h2{font-size:clamp(26px,2.6vw,38px);line-height:1.22;}
h3{font-size:20px;line-height:1.35;}
.lead{font-size:16.5px;color:var(--ink-2);line-height:1.85;}
.muted{color:var(--ink-3);font-size:14px;}
.tiny{font-size:12.5px;color:var(--ink-3);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .18s cubic-bezier(.2,.7,.3,1),box-shadow .18s cubic-bezier(.2,.7,.3,1),background-color .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent);
  color:#20130A;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.22),0 0 0 0 var(--glow-accent);
}
.btn-primary:hover{
  background:#FFB255;color:#20130A;text-decoration:none;transform:translateY(-1px);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28),0 0 0 6px rgba(255,165,59,.16),0 0 26px var(--glow-accent);
}
.btn-primary:active{transform:translateY(1px);box-shadow:inset 0 0 0 1px rgba(255,255,255,.2);}
.btn-ghost{
  background:rgba(255,255,255,.045);
  border-color:var(--line);color:var(--ink-1);
  backdrop-filter:blur(14px) saturate(140%);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.08);border-color:rgba(47,139,255,.3);color:#fff;text-decoration:none;transform:translateY(-1px);
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);}
.text-link:hover{text-decoration:underline;text-underline-offset:4px;color:#7DB6FF;}
.text-link svg{transition:transform .18s ease;}
.text-link:hover svg{transform:translateX(3px);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:var(--header-h);
  display:flex;align-items:center;
  background:rgba(7,11,20,.72);
  border-bottom:1px solid transparent;
  transition:height .22s ease,background-color .22s ease,border-color .22s ease,backdrop-filter .22s ease;
}
.site-header.is-scrolled{
  height:56px;
  background:rgba(7,11,20,.88);
  border-bottom-color:var(--line);
  backdrop-filter:blur(16px) saturate(140%);
}
.header-inner{display:flex;align-items:center;gap:20px;width:100%;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink-1);font-weight:700;white-space:nowrap;}
.logo:hover{text-decoration:none;color:var(--ink-1);}
.logo-mark{
  width:24px;height:24px;border-radius:7px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),var(--ok));
  box-shadow:0 0 18px var(--glow-brand);
}
.logo-text{font-size:16px;letter-spacing:.01em;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:12px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:36px;
  padding:0 12px;border-radius:8px;font-size:15px;color:var(--ink-2);
  transition:background-color .18s ease,color .18s ease;
}
.nav-link:hover{background:rgba(255,255,255,.06);color:var(--ink-1);text-decoration:none;}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-2px;height:2px;border-radius:2px;background:var(--brand);
}
.nav-link.is-active::before{
  content:"";position:absolute;left:-2px;top:50%;width:4px;height:4px;margin-top:-2px;border-radius:50%;background:var(--brand);
}
.header-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:220px;height:38px;padding:0 10px;
  border-radius:var(--r-btn);border:1px solid var(--line);
  background:rgba(255,255,255,.045);color:var(--ink-3);
  font-size:14px;cursor:pointer;transition:border-color .18s ease,background-color .18s ease;
}
.command-search:hover{border-color:var(--line-strong);background:rgba(255,255,255,.07);}
.command-search .cs-label{flex:1;text-align:left;}
.kbd{
  font-family:var(--font-mono);font-size:11.5px;line-height:1;
  padding:4px 6px;border-radius:6px;border:1px solid var(--line);
  background:rgba(255,255,255,.06);color:var(--ink-2);
}
.icon-btn{
  width:38px;height:38px;border-radius:50%;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:rgba(255,255,255,.045);color:var(--ink-2);
  transition:border-color .18s ease,color .18s ease,background-color .18s ease,transform .18s ease;
}
.icon-btn:hover{border-color:var(--line-strong);color:var(--ink-1);background:rgba(255,255,255,.08);transform:translateY(-1px);}
.menu-toggle{display:none;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:rgba(255,255,255,.045);color:var(--ink-1);align-items:center;justify-content:center;}

/* 命令面板 */
.command-panel{
  position:fixed;inset:0;z-index:90;display:none;
  align-items:flex-start;justify-content:center;
  padding:14vh 20px 20px;
  background:rgba(4,7,13,.62);
  backdrop-filter:blur(10px);
}
.command-panel.is-open{display:flex;}
.command-box{
  width:100%;max-width:620px;border-radius:var(--r-card);
  background:rgba(17,27,46,.94);border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card);padding:18px;
}
.command-input{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--ink-1);
}
.command-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--glow-brand);}
.command-list{margin-top:14px;display:flex;flex-direction:column;gap:6px;}
.command-list a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:11px 12px;border-radius:var(--r-sm);color:var(--ink-2);font-size:14.5px;
}
.command-list a:hover{background:rgba(255,255,255,.06);color:var(--ink-1);text-decoration:none;}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(88vw,360px);z-index:95;
  background:rgba(12,20,36,.96);backdrop-filter:blur(18px) saturate(140%);
  border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .26s cubic-bezier(.2,.7,.3,1);
  padding:20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.mobile-drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  height:48px;display:flex;align-items:center;padding:0 12px;border-radius:var(--r-sm);
  color:var(--ink-2);font-size:16px;
}
.drawer-nav a:hover,.drawer-nav a.is-active{background:rgba(255,255,255,.06);color:var(--ink-1);text-decoration:none;}
.drawer-nav a.is-active{color:var(--brand);}
.scrim{position:fixed;inset:0;background:rgba(4,7,13,.6);z-index:92;display:none;}
.scrim.is-open{display:block;}

/* ---------- Banner ---------- */
.banner{
  position:relative;overflow:hidden;
  padding-block:clamp(56px,7vw,96px);
  border-bottom:1px solid var(--line);
}
.banner-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(7,11,20,.9),rgba(7,11,20,.74)),url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
  opacity:.14;
}
.banner-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:48px;align-items:center;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--ink-3);opacity:.6;}
.breadcrumb .current{color:var(--brand);}
.banner h1{margin-bottom:18px;}
.banner .lead{max-width:640px;margin-bottom:28px;}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;}

.banner-panel{
  border-radius:var(--r-card);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-card);
  padding:22px;
}
@supports not (backdrop-filter:blur(1px)){.banner-panel{background:#111B2E;}}
.banner-panel .panel-title{font-size:13px;color:var(--ink-3);margin-bottom:14px;letter-spacing:.04em;}
.mini-param{display:flex;flex-direction:column;gap:14px;}
.mini-param .row-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;font-size:14px;color:var(--ink-2);}
.mini-param .row-top b{font-size:19px;color:var(--ink-1);font-weight:700;}
.mini-track{height:6px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;margin-top:8px;}
.mini-fill{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),var(--accent));}
.status-dot{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;padding-top:16px;
  border-top:1px solid var(--line);font-size:13px;color:var(--ink-3);
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(47,210,168,.6);animation:breathe 2.4s infinite;}
@keyframes breathe{
  0%{box-shadow:0 0 0 0 rgba(47,210,168,.55);}
  70%{box-shadow:0 0 0 10px rgba(47,210,168,0);}
  100%{box-shadow:0 0 0 0 rgba(47,210,168,0);}
}

/* ---------- 矩阵卡 ---------- */
.matrix-cell{display:flex;margin-bottom:24px;}
.matrix-card{
  width:100%;display:flex;flex-direction:column;gap:14px;
  padding:28px 24px;border-radius:var(--r-card);
  background:var(--bg-panel);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .2s cubic-bezier(.2,.7,.3,1),border-color .2s ease,box-shadow .2s ease;
}
.matrix-card:hover{transform:translateY(-2px);border-color:var(--line-strong);}
.matrix-icon{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(47,139,255,.12);border:1px solid rgba(47,139,255,.28);color:var(--brand);
}
.matrix-card h3{font-size:20px;}
.matrix-card p{font-size:14.5px;color:var(--ink-2);line-height:1.8;}
.matrix-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);}
.matrix-foot .idx{font-size:12.5px;color:var(--ink-3);}

/* ---------- 参数条 ---------- */
.param-panel{
  border-radius:var(--r-card);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-card);
  padding:32px;
}
@supports not (backdrop-filter:blur(1px)){.param-panel{background:#111B2E;}}
.param-row{
  display:grid;grid-template-columns:minmax(120px,1.1fr) minmax(0,2.6fr) minmax(84px,auto);
  align-items:center;gap:20px;padding:16px 0;border-bottom:1px solid var(--line);
}
.param-row:last-child{border-bottom:none;padding-bottom:0;}
.param-row:first-child{padding-top:0;}
.param-name{font-size:15px;color:var(--ink-1);}
.param-track{height:8px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;}
.param-fill{
  display:block;height:100%;width:0;border-radius:99px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  transition:width .9s cubic-bezier(.2,.7,.3,1);
}
.param-value{font-size:17px;font-weight:700;color:var(--ink-1);text-align:right;}
.param-value span{font-size:12.5px;color:var(--ink-3);font-weight:400;margin-left:4px;}

/* ---------- 双栏说明 ---------- */
.dual-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.info-card{
  border-radius:var(--r-card);padding:28px;
  background:rgba(255,255,255,.045);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);box-shadow:var(--shadow-card);
}
@supports not (backdrop-filter:blur(1px)){.info-card{background:#111B2E;}}
.info-card h3{margin-bottom:14px;}
.info-card p{color:var(--ink-2);font-size:14.8px;margin-bottom:16px;}
.check-list{display:flex;flex-direction:column;gap:12px;}
.check-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);}
.check-list svg{flex:0 0 auto;margin-top:5px;color:var(--ok);}
.dual-figure{margin-top:24px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);}
.dual-figure img{width:100%;height:auto;object-fit:cover;aspect-ratio:16/7;}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:40px;align-items:start;}
.faq-aside h2{margin-bottom:14px;}
.faq-aside p{color:var(--ink-2);font-size:14.8px;margin-bottom:20px;}
.faq-hint{
  border-radius:var(--r-card);padding:20px;
  background:rgba(255,255,255,.045);border:1px solid var(--line);
  display:flex;flex-direction:column;gap:10px;
}
.faq-hint strong{font-size:15px;}
.faq-hint a{font-size:14px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border-radius:14px;border:1px solid var(--line);
  background:rgba(255,255,255,.045);
  overflow:hidden;transition:border-color .2s ease,background-color .2s ease;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item.is-open{background:rgba(255,255,255,.07);border-color:var(--line-strong);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:transparent;border:0;text-align:left;
  color:var(--ink-1);font-size:15.5px;font-weight:600;
}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;color:var(--brand);
  transition:transform .22s cubic-bezier(.2,.7,.3,1);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item.is-open .faq-icon{transform:rotate(135deg);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .28s ease;
}
.faq-a p{
  padding:0 20px 20px;color:var(--ink-2);font-size:14.5px;line-height:1.8;
}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;overflow:hidden;
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(47,139,255,.12),rgba(12,20,36,.9) 55%);
  box-shadow:var(--shadow-card);
  padding:44px;
  display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:36px;align-items:center;
}
.cta-panel h2{margin-bottom:14px;}
.cta-panel p{color:var(--ink-2);font-size:15px;margin-bottom:22px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-figure{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);}
.cta-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:clamp(56px,6vw,96px);
  border-top:1px solid var(--line);
  background:rgba(9,14,24,.86);
  padding-top:64px;
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:44px;
}
.footer-brand p{color:var(--ink-2);font-size:14px;margin:16px 0 20px;max-width:340px;}
.footer-social{display:flex;gap:12px;}
.footer-social a{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--ink-2);background:rgba(255,255,255,.04);
  transition:border-color .18s ease,color .18s ease,transform .18s ease;
}
.footer-social a:hover{border-color:var(--line-strong);color:var(--brand);transform:translateY(-1px);text-decoration:none;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--ink-1);}
.footer-col ul{display:flex;flex-direction:column;gap:4px;}
.footer-col a{color:var(--ink-2);font-size:14px;line-height:2;}
.footer-col a:hover{color:var(--brand);text-decoration:none;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.footer-bottom .right{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--ink-2);font-size:13px;}
.to-top:hover{color:var(--brand);text-decoration:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .main-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .command-search{width:180px;}
}
@media (max-width:1023px){
  .container{padding-inline:24px;}
  .banner-inner{grid-template-columns:1fr;gap:32px;}
  .faq-grid{grid-template-columns:1fr;gap:28px;}
  .cta-panel{grid-template-columns:1fr;padding:32px;}
  .dual-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
  h1{font-size:clamp(30px,6vw,40px);}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding-inline:20px;}
  .header-right .command-search{display:none;}
  .header-right .btn{display:none;}
  .matrix-cell{margin-bottom:16px;}
  .param-row{grid-template-columns:1fr;gap:10px;align-items:flex-start;}
  .param-value{text-align:left;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-actions .btn{width:100%;}
  .banner-actions .btn{width:100%;}
}
@media (max-width:520px){
  .container{padding-inline:16px;}
  .matrix-card{padding:22px 18px;}
  .param-panel{padding:22px 18px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
/* ============================================================
   hth官方网页版 · 常见问题与支持（category4）
   设计系统 / 变量 / reset / 布局 / 组件 / 响应式
   ============================================================ */
:root{
  --bg-base:#070B14;
  --bg-raise:#0C1424;
  --bg-panel:#111B2E;
  --ink-1:#EAF2FF;
  --ink-2:#A9B8D0;
  --ink-3:#6C7C96;
  --line:rgba(150,180,220,.14);
  --line-strong:rgba(120,170,255,.28);
  --brand:#2F8BFF;
  --accent:#FFA53B;
  --ok:#2FD2A8;
  --glow-brand:rgba(47,139,255,.45);
  --glow-accent:rgba(255,165,59,.42);
  --glass:rgba(255,255,255,.045);
  --glass-hi:rgba(255,255,255,.08);
  --r-card:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-btn:10px;
  --r-img:16px;
  --r-badge:8px;
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset, 0 24px 48px -24px rgba(0,0,0,.7);
  --shadow-lift:0 1px 0 rgba(255,255,255,.09) inset, 0 30px 58px -22px rgba(0,0,0,.8);
  --shell:1320px;
  --sec-pad:clamp(72px,8vw,128px);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-1);
  background-color:var(--bg-base);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed; inset:0; z-index:-2; pointer-events:none;
  background:
    radial-gradient(900px 620px at 6% -6%, rgba(47,139,255,.12), transparent 62%),
    radial-gradient(820px 640px at 102% 104%, rgba(255,165,59,.08), transparent 60%),
    var(--bg-base);
}
body::after{
  content:"";
  position:fixed; inset:0; z-index:-1; pointer-events:none; opacity:.9;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(/%23n)' opacity='.03'/%3E%3C/svg%3E");
  background-size:24px 24px, 24px 24px, 140px 140px;
}
img{ max-width:100%; display:block; border:0; }
a{ color:inherit; text-decoration:none; }
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(47,139,255,.28);
  border-radius:8px;
}
p{ margin:0 0 1.1em; color:var(--ink-2); }
h1,h2,h3,h4{ margin:0; color:var(--ink-1); line-height:1.24; font-weight:700; }
ul{margin:0;padding:0;list-style:none;}
button{ font-family:inherit; cursor:pointer; }
::selection{ background:rgba(47,139,255,.35); color:#fff; }

.container{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-inline:32px;
}
.section{ padding-block:var(--sec-pad); position:relative; }
.section-head{ margin-bottom:clamp(32px,4vw,56px); }
.section-head h2{ font-size:clamp(26px,2.6vw,38px); letter-spacing:-.01em; }
.section-head p{ margin:14px 0 0; font-size:15px; max-width:640px; }
.section-head.split{
  display:flex; align-items:flex-end; justify-content:space-between; gap:32px; flex-wrap:wrap;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:13px; letter-spacing:.06em; color:var(--brand);
  padding:6px 12px; border:1px solid rgba(47,139,255,.32);
  border-radius:var(--r-badge); background:rgba(47,139,255,.08);
  margin-bottom:18px;
}
.eyebrow::before{
  content:""; width:6px; height:6px; border-radius:50%;
  background:var(--brand); box-shadow:0 0 10px var(--glow-brand);
}
.mono{ font-family:var(--font-mono); font-variant-numeric:tabular-nums; }
.glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
}
@supports not ((backdrop-filter:blur(4px)) or (-webkit-backdrop-filter:blur(4px))){
  .glass{ background:var(--bg-panel); }
}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:48px; padding:0 24px;
  font-size:15px; font-weight:600; line-height:1;
  border-radius:var(--r-btn); border:1px solid transparent;
  transition:transform 180ms var(--ease), background-color 180ms var(--ease),
             box-shadow 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease);
  white-space:nowrap;
}
.btn-sm{ height:40px; padding:0 18px; font-size:14px; }
.btn-primary{
  background:var(--accent);
  color:#231404;
  box-shadow:0 0 0 1px rgba(255,255,255,.18) inset, 0 10px 28px -12px var(--glow-accent);
}
.btn-primary:hover{
  background:#ffb154;
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(255,255,255,.22) inset, 0 14px 34px -10px var(--glow-accent);
}
.btn-primary:active{ transform:translateY(1px); box-shadow:0 0 0 1px rgba(255,255,255,.14) inset; }
.btn-ghost{
  background:var(--glass);
  border-color:var(--line);
  color:var(--ink-1);
}
.btn-ghost:hover{
  background:var(--glass-hi);
  border-color:rgba(47,139,255,.3);
  transform:translateY(-1px);
}
.btn-ghost:active{ transform:translateY(1px); }
.text-link{
  color:var(--brand); font-weight:600; font-size:14.5px;
  display:inline-flex; align-items:center; gap:6px;
  transition:color 180ms var(--ease), text-decoration-color 180ms var(--ease);
  text-decoration:underline transparent; text-underline-offset:4px;
}
.text-link:hover{ color:#68aaff; text-decoration-color:currentColor; }
.text-link svg{ transition:transform 200ms var(--ease); }
.text-link:hover svg{ transform:translateX(4px); }

.badge{
  display:inline-flex; align-items:center; gap:6px; height:24px; padding:0 10px;
  font-size:12.5px; font-weight:600; border-radius:var(--r-badge);
  background:rgba(47,139,255,.12); border:1px solid rgba(47,139,255,.28); color:#9fcaff;
}
.badge-ok{ background:rgba(47,210,168,.12); border-color:rgba(47,210,168,.32); color:#7ff0d2; }
.badge-accent{ background:rgba(255,165,59,.12); border-color:rgba(255,165,59,.32); color:#ffc57e; }
.chip{
  display:inline-flex; align-items:center; height:32px; padding:0 14px;
  font-size:13px; border-radius:var(--r-badge);
  border:1px solid var(--line); background:rgba(255,255,255,.04); color:var(--ink-2);
}

/* ---------------- Header ---------------- */
.site-header{
  position:sticky; top:0; z-index:60;
  height:68px; display:flex; align-items:center;
  transition:height 220ms var(--ease), background-color 220ms var(--ease),
             backdrop-filter 220ms var(--ease), border-color 220ms var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  height:56px;
  background:rgba(7,11,20,.72);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom-color:var(--line);
}
.header-inner{ display:flex; align-items:center; gap:24px; width:100%; }
.logo{ display:inline-flex; align-items:center; gap:10px; flex:0 0 auto; }
.logo-mark{
  width:24px; height:24px; border-radius:7px;
  background:linear-gradient(140deg,var(--brand),#1a5fd0 55%,var(--accent));
  box-shadow:0 0 18px -4px var(--glow-brand);
}
.logo-text{
  font-size:16px; font-weight:700; letter-spacing:.01em; color:var(--ink-1);
  white-space:nowrap;
}
.main-nav{ display:flex; align-items:center; gap:4px; margin-inline:auto; }
.nav-link{
  position:relative; display:inline-flex; align-items:center;
  height:36px; padding:0 14px; font-size:15px; color:var(--ink-2);
  border-radius:999px;
  transition:color 180ms var(--ease), background-color 180ms var(--ease);
}
.nav-link::after{
  content:""; position:absolute; left:14px; right:14px; bottom:-14px; height:2px;
  background:var(--brand); border-radius:2px; transform:scaleX(0); transform-origin:center;
  transition:transform 220ms var(--ease);
}
.nav-link:hover{ color:var(--ink-1); background:rgba(255,255,255,.05); }
.nav-link:hover::after{ transform:scaleX(1); }
.nav-link.is-active{ color:#8fc2ff; background:rgba(47,139,255,.1); }
.nav-link.is-active::after{ transform:scaleX(1); }
.header-actions{ display:flex; align-items:center; gap:12px; flex:0 0 auto; }
.command-search{
  display:inline-flex; align-items:center; gap:8px;
  width:220px; height:38px; padding:0 10px 0 12px;
  background:rgba(255,255,255,.045);
  border:1px solid var(--line); border-radius:var(--r-btn);
  color:var(--ink-3); font-size:13.5px;
  transition:border-color 180ms var(--ease), background-color 180ms var(--ease);
}
.command-search:hover{ border-color:var(--line-strong); background:rgba(255,255,255,.07); }
.command-search svg{ flex:0 0 auto; color:var(--ink-3); }
.cs-placeholder{ flex:1; text-align:left; color:var(--ink-3); }
.cs-key{
  font-family:var(--font-mono); font-size:11.5px; color:var(--ink-3);
  border:1px solid var(--line); border-radius:6px; padding:1px 6px;
}
.icon-btn{
  display:inline-flex; align-items:center; justify-content:center;
  width:38px; height:38px; border-radius:50%;
  border:1px solid var(--line); background:rgba(255,255,255,.04); color:var(--ink-2);
  transition:all 180ms var(--ease);
}
.icon-btn:hover{ color:var(--ink-1); border-color:var(--line-strong); background:rgba(255,255,255,.08); transform:translateY(-1px); }
.nav-toggle{
  display:none; align-items:center; justify-content:center;
  width:40px; height:40px; border-radius:var(--r-btn);
  border:1px solid var(--line); background:rgba(255,255,255,.04); color:var(--ink-1);
}

/* 命令面板 */
.command-mask{
  position:fixed; inset:0; z-index:90;
  background:rgba(4,7,13,.66);
  -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px);
  opacity:0; visibility:hidden; transition:opacity 200ms var(--ease), visibility 200ms var(--ease);
}
.command-mask.is-open{ opacity:1; visibility:visible; }
.command-panel{
  position:fixed; z-index:91; left:50%; top:16vh; transform:translate(-50%,-12px);
  width:min(620px, calc(100% - 32px));
  padding:18px; border-radius:var(--r-card);
  background:rgba(12,20,36,.86);
  -webkit-backdrop-filter:blur(20px) saturate(150%);
  backdrop-filter:blur(20px) saturate(150%);
  border:1px solid var(--line); box-shadow:0 40px 90px -30px rgba(0,0,0,.9);
  opacity:0; visibility:hidden;
  transition:opacity 200ms var(--ease), transform 220ms var(--ease), visibility 200ms var(--ease);
}
.command-panel.is-open{ opacity:1; visibility:visible; transform:translate(-50%,0); }
.command-panel .cp-input{
  width:100%; height:48px; padding:0 16px; font-size:15px; color:var(--ink-1);
  background:rgba(255,255,255,.05); border:1px solid var(--line); border-radius:var(--r-sm);
}
.command-panel .cp-input::placeholder{ color:var(--ink-3); }
.cp-list{ margin-top:14px; display:grid; gap:8px; }
.cp-item{
  display:flex; align-items:center; gap:12px; padding:12px 14px;
  border-radius:var(--r-sm); border:1px solid transparent; color:var(--ink-2); font-size:14.5px;
  transition:all 160ms var(--ease);
}
.cp-item:hover{ background:rgba(255,255,255,.06); border-color:var(--line); color:var(--ink-1); }
.cp-item span.k{ font-family:var(--font-mono); font-size:12px; color:var(--ink-3); margin-left:auto; }

/* 移动抽屉 */
.drawer-mask{
  position:fixed; inset:0; z-index:80; background:rgba(4,7,13,.62);
  -webkit-backdrop-filter:blur(4px); backdrop-filter:blur(4px);
  opacity:0; visibility:hidden; transition:opacity 200ms var(--ease), visibility 200ms var(--ease);
}
.drawer-mask.is-open{ opacity:1; visibility:visible; }
.drawer{
  position:fixed; top:0; right:0; z-index:81;
  width:min(360px, 86vw); height:100%;
  padding:22px 20px 28px;
  background:rgba(10,16,30,.94);
  -webkit-backdrop-filter:blur(22px) saturate(150%);
  backdrop-filter:blur(22px) saturate(150%);
  border-left:1px solid var(--line);
  transform:translateX(102%); transition:transform 280ms var(--ease);
  display:flex; flex-direction:column; gap:18px; overflow-y:auto;
}
.drawer.is-open{ transform:translateX(0); }
.drawer .drawer-head{ display:flex; align-items:center; justify-content:space-between; }
.drawer .drawer-search{
  width:100%; height:44px; padding:0 14px; font-size:14px; color:var(--ink-1);
  background:rgba(255,255,255,.05); border:1px solid var(--line); border-radius:var(--r-sm);
}
.drawer-nav{ display:flex; flex-direction:column; }
.drawer-nav a{
  display:flex; align-items:center; height:48px; padding:0 12px;
  border-bottom:1px solid var(--line); font-size:15px; color:var(--ink-2);
}
.drawer-nav a.is-active{ color:#8fc2ff; }
.drawer .btn{ width:100%; }

/* ---------------- 面包屑 ---------------- */
.breadcrumb{
  display:flex; align-items:center; gap:8px; flex-wrap:wrap;
  font-size:13px; color:var(--ink-3); margin-bottom:22px;
}
.breadcrumb a{ color:var(--ink-3); transition:color 160ms var(--ease); }
.breadcrumb a:hover{ color:var(--brand); }
.breadcrumb .sep{ color:rgba(108,124,150,.6); }
.breadcrumb .current{ color:var(--brand); }

/* ---------------- Banner ---------------- */
.page-banner{
  position:relative; overflow:hidden;
  padding-block:clamp(56px,7vw,96px) clamp(48px,6vw,80px);
  border-bottom:1px solid var(--line);
}
.page-banner::before{
  content:""; position:absolute; inset:0; z-index:0;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover; background-position:center 26%;
  opacity:.11; filter:saturate(.8);
}
.page-banner::after{
  content:""; position:absolute; inset:0; z-index:1;
  background:linear-gradient(180deg, rgba(7,11,20,.55) 0%, rgba(7,11,20,.86) 62%, var(--bg-base) 100%);
}
.page-banner > .container{ position:relative; z-index:2; }
.banner-grid{
  display:grid; grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);
  gap:clamp(28px,3.4vw,56px); align-items:end;
}
.banner-copy h1{
  font-size:clamp(34px,4.4vw,56px); letter-spacing:-.02em; line-height:1.18;
  max-width:16em;
}
.banner-copy p{
  margin-top:20px; font-size:16.5px; max-width:600px; color:var(--ink-2);
}
.banner-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-top:30px; }
.banner-aside{ padding:22px; }
.banner-aside .ba-title{
  font-size:13px; color:var(--ink-3); letter-spacing:.05em; margin-bottom:14px;
}
.banner-aside ul{ display:grid; gap:12px; }
.banner-aside li{
  display:flex; align-items:center; gap:10px; font-size:14px; color:var(--ink-2);
  padding-bottom:12px; border-bottom:1px solid var(--line);
}
.banner-aside li:last-child{ border-bottom:0; padding-bottom:0; }
.banner-aside li .dot{
  width:7px; height:7px; border-radius:50%; background:var(--ok);
  box-shadow:0 0 10px rgba(47,210,168,.6); flex:0 0 auto;
}

/* ---------------- 对比双栏 ---------------- */
.cmp-grid{
  display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:24px; align-items:stretch;
}
.cmp-col{
  padding:28px 26px 26px; border-radius:var(--r-card);
  background:var(--bg-raise); border:1px solid var(--line);
  box-shadow:var(--shadow-card); position:relative; overflow:hidden;
}
.cmp-col.after{
  background:linear-gradient(180deg, rgba(47,139,255,.07), rgba(17,27,46,.96) 42%);
  border-color:var(--line-strong);
}
.cmp-col.after::before{
  content:""; position:absolute; left:0; right:0; top:0; height:3px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
}
.cmp-col.before::before{
  content:""; position:absolute; left:0; right:0; top:0; height:3px;
  background:linear-gradient(90deg,rgba(150,180,220,.32),rgba(150,180,220,.06));
}
.cmp-head{ display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:24px; }
.cmp-head h3{ font-size:20px; }
.cmp-head .tag{
  font-size:12.5px; color:var(--ink-3); border:1px solid var(--line);
  border-radius:var(--r-badge); padding:2px 10px;
}
.cmp-row{ margin-bottom:20px; }
.cmp-row:last-child{ margin-bottom:0; }
.cmp-top{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:8px; }
.cmp-label{ font-size:14px; color:var(--ink-2); }
.cmp-val{ font-family:var(--font-mono); font-variant-numeric:tabular-nums; font-size:14px; color:var(--ink-1); }
.cmp-bar{ height:8px; border-radius:6px; background:rgba(255,255,255,.08); overflow:hidden; }
.cmp-fill{
  display:block; height:100%; width:0; border-radius:6px;
  transition:width 900ms var(--ease);
}
.cmp-col.before .cmp-fill{ background:linear-gradient(90deg,rgba(150,180,220,.45),rgba(150,180,220,.24)); }
.cmp-col.after .cmp-fill{ background:linear-gradient(90deg,var(--brand),var(--accent)); box-shadow:0 0 14px -2px var(--glow-brand); }
.cmp-note{
  margin-top:26px; display:flex; align-items:flex-start; gap:12px;
  padding:16px 18px; border-radius:var(--r-sm);
  background:rgba(255,255,255,.04); border:1px solid var(--line); font-size:14px; color:var(--ink-2);
}
.cmp-note svg{ flex:0 0 auto; color:var(--brand); margin-top:3px; }

/* ---------------- 编号清单 ---------------- */
.steps{ display:grid; gap:16px; }
.step{
  display:grid; grid-template-columns:88px minmax(0,1fr);
  gap:24px; align-items:center;
  padding:22px 26px; border-radius:var(--r-card);
  background:var(--bg-raise); border:1px solid var(--line);
  transition:transform 200ms var(--ease), border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}
.step:hover{
  transform:translateY(-2px); border-color:var(--line-strong); box-shadow:var(--shadow-lift);
}
.step-num{
  font-family:var(--font-mono); font-variant-numeric:tabular-nums;
  font-size:34px; font-weight:700; line-height:1;
  color:transparent; -webkit-text-stroke:1px rgba(47,139,255,.55);
}
.step h3{ font-size:18px; margin-bottom:6px; }
.step p{ margin:0; font-size:14.5px; }
.step .step-tag{ margin-top:12px; display:flex; gap:8px; flex-wrap:wrap; }

/* ---------------- 指标看板（3 列） ---------------- */
.kpi-grid{ display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:24px; }
.kpi-card{
  position:relative; overflow:hidden; padding:28px 24px 24px;
  border-radius:var(--r-card);
}
.kpi-card::before{
  content:""; position:absolute; left:0; right:0; top:0; height:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  transition:transform 300ms var(--ease); transform-origin:left;
}
.kpi-card:hover::before{ transform:scaleX(1.12); }
.kpi-name{ font-size:14px; color:var(--ink-3); letter-spacing:.02em; }
.kpi-value{
  font-family:var(--font-mono); font-variant-numeric:tabular-nums;
  font-size:clamp(30px,3.4vw,40px); font-weight:700; line-height:1.1;
  margin:14px 0 12px; color:var(--ink-1);
  transition:color 200ms var(--ease);
}
.kpi-card:hover .kpi-value{ color:var(--brand); }
.kpi-foot{ font-size:12.5px; color:var(--ink-3); }

/* ---------------- FAQ ---------------- */
.faq-layout{ display:grid; grid-template-columns:3fr 9fr; gap:clamp(28px,4vw,64px); align-items:start; }
.faq-side h2{ font-size:clamp(26px,2.6vw,38px); }
.faq-side p{ margin-top:16px; font-size:15px; }
.faq-side .side-card{
  margin-top:26px; padding:20px; border-radius:var(--r-md);
  background:var(--glass); border:1px solid var(--line);
}
.faq-side .side-card strong{ display:block; font-size:15px; color:var(--ink-1); margin-bottom:6px; }
.faq-side .side-card span{ font-size:13.5px; color:var(--ink-3); display:block; margin-bottom:14px; }
.faq-acc{ list-style:none; margin:0; padding:0; background:transparent; border:0; }
.faq-acc .accordion-item{ margin:0 0 12px; background:transparent; border:0; }
.faq-acc .accordion-title{
  position:relative; display:block;
  padding:18px 58px 18px 22px;
  font-size:15.5px; font-weight:600; color:var(--ink-1);
  background:var(--glass); border:1px solid var(--line); border-radius:14px;
  transition:background-color 180ms var(--ease), border-color 180ms var(--ease);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
}
@supports not ((backdrop-filter:blur(4px)) or (-webkit-backdrop-filter:blur(4px))){
  .faq-acc .accordion-title{ background:var(--bg-panel); }
}
.faq-acc .accordion-title:hover{ background:var(--glass-hi); border-color:var(--line-strong); }
.faq-acc .accordion-title::after{
  content:""; position:absolute; right:22px; top:50%; margin-top:-7px;
  width:14px; height:14px;
  background-image:
    linear-gradient(var(--ink-2),var(--ink-2)),
    linear-gradient(var(--ink-2),var(--ink-2));
  background-position:center center, center center;
  background-size:14px 2px, 2px 14px;
  background-repeat:no-repeat;
  transition:transform 240ms var(--ease);
}
.faq-acc .accordion-title[aria-expanded="true"]::after{
  transform:rotate(45deg);
}
.faq-acc .accordion-title[aria-expanded="true"]{
  background:var(--glass-hi); border-color:var(--line-strong);
  border-radius:14px 14px 0 0;
}
.faq-acc .accordion-content{
  padding:6px 22px 20px;
  background:rgba(255,255,255,.028);
  border:1px solid var(--line); border-top:0; border-radius:0 0 14px 14px;
  color:var(--ink-2); font-size:14.5px; line-height:1.8;
}
.faq-acc .accordion-content p{ font-size:14.5px; margin:0 0 .8em; }
.faq-acc .accordion-content p:last-child{ margin-bottom:0; }

/* ---------------- CTA ---------------- */
.cta-wrap{
  display:grid; grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:clamp(24px,3vw,48px); align-items:stretch;
}
.cta-copy h2{ font-size:clamp(26px,2.6vw,38px); }
.cta-copy > p{ margin-top:16px; font-size:15px; }
.cta-checks{ margin-top:26px; display:grid; gap:12px; }
.cta-checks li{ display:flex; align-items:flex-start; gap:10px; font-size:14.5px; color:var(--ink-2); }
.cta-checks svg{ flex:0 0 auto; color:var(--ok); margin-top:5px; }
.cta-media{
  margin-top:28px; border-radius:var(--r-img); overflow:hidden;
  border:1px solid var(--line); aspect-ratio:16/9;
}
.cta-media img{ width:100%; height:100%; object-fit:cover; }
.form-card{ padding:clamp(22px,2.6vw,32px); }
.form-card h3{ font-size:20px; margin-bottom:8px; }
.form-card .form-hint{ font-size:13.5px; color:var(--ink-3); margin-bottom:22px; }
.field{ margin-bottom:18px; }
.field label{ display:block; font-size:13px; color:var(--ink-3); margin-bottom:8px; }
.field input,.field select,.field textarea{
  width:100%; height:46px; padding:0 14px; font-size:14.5px;
  color:var(--ink-1); background:rgba(255,255,255,.05);
  border:1px solid var(--line); border-radius:var(--r-sm);
  transition:border-color 180ms var(--ease), box-shadow 180ms var(--ease), background-color 180ms var(--ease);
  font-family:inherit;
}
.field textarea{ height:auto; min-height:104px; padding:12px 14px; line-height:1.7; resize:vertical; }
.field input::placeholder,.field textarea::placeholder{ color:var(--ink-3); }
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(47,139,255,.28);
  background:rgba(255,255,255,.07);
}
.field select{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236C7C96' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 14px center;
  padding-right:38px;
}
.form-card .btn{ width:100%; }
.form-privacy{ margin-top:12px; font-size:12px; color:var(--ink-3); line-height:1.7; }
.form-msg{
  margin-top:14px; display:none; align-items:center; gap:10px;
  padding:12px 14px; border-radius:var(--r-sm);
  background:var(--glass); border:1px solid var(--line); font-size:13.5px; color:var(--ink-2);
}
.form-msg.is-visible{ display:flex; }
.form-msg svg{ color:var(--ok); flex:0 0 auto; }

/* ---------------- Footer ---------------- */
.site-footer{
  margin-top:clamp(48px,6vw,96px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(12,20,36,.5), rgba(7,11,20,.9));
  padding-top:clamp(48px,5vw,72px);
}
.footer-grid{
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:clamp(24px,3vw,48px);
  padding-bottom:44px;
}
.footer-brand .logo{ margin-bottom:16px; }
.footer-brand p{ font-size:14px; max-width:320px; margin-bottom:20px; }
.footer-social{ display:flex; gap:12px; }
.footer-social a{
  display:inline-flex; align-items:center; justify-content:center;
  width:36px; height:36px; border-radius:50%;
  border:1px solid var(--line); background:rgba(255,255,255,.04); color:var(--ink-2);
  transition:all 180ms var(--ease);
}
.footer-social a:hover{ color:var(--ink-1); border-color:var(--line-strong); background:rgba(255,255,255,.08); }
.footer-col h4{ font-size:14px; color:var(--ink-1); margin-bottom:16px; }
.footer-col ul{ display:grid; gap:2px; }
.footer-col a{
  font-size:14px; line-height:2; color:var(--ink-3);
  transition:color 180ms var(--ease);
}
.footer-col a:hover{ color:var(--brand); }
.footer-bottom{
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  padding:20px 0 28px; border-top:1px solid var(--line);
  font-size:13px; color:var(--ink-3);
}
.footer-bottom .right{ display:flex; align-items:center; gap:18px; flex-wrap:wrap; }
.to-top{
  display:inline-flex; align-items:center; gap:6px; color:var(--ink-2);
  transition:color 180ms var(--ease);
}
.to-top:hover{ color:var(--brand); }

/* ---------------- 动效克制 ---------------- */
@keyframes pulseDot{
  0%,100%{ opacity:1; transform:scale(1); }
  50%{ opacity:.45; transform:scale(.85); }
}
.pulse-dot{
  width:8px; height:8px; border-radius:50%; background:var(--ok);
  box-shadow:0 0 12px rgba(47,210,168,.7);
  animation:pulseDot 2.4s ease-in-out infinite;
}
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition-duration:.01ms !important; }
  html{ scroll-behavior:auto; }
}

/* ---------------- 响应式 ---------------- */
@media (max-width:1279px){
  .container{ padding-inline:24px; }
}
@media (max-width:1023px){
  .container{ padding-inline:24px; }
  .main-nav,
  .header-actions .command-search,
  .header-actions .icon-btn,
  .header-actions .btn-sm{ display:none; }
  .nav-toggle{ display:inline-flex; }
  .banner-grid{ grid-template-columns:1fr; align-items:start; }
  .banner-aside{ max-width:520px; }
  .cmp-grid{ grid-template-columns:1fr; }
  .kpi-grid{ grid-template-columns:repeat(2, minmax(0,1fr)); }
  .faq-layout{ grid-template-columns:1fr; }
  .cta-wrap{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .footer-brand{ grid-column:1 / -1; }
}
@media (max-width:639px){
  body{ font-size:16px; }
  .container{ padding-inline:20px; }
  .logo-text{ font-size:15px; }
  .page-banner{ padding-block:44px 40px; }
  .banner-copy h1{ font-size:30px; }
  .banner-copy p{ font-size:15.5px; }
  .banner-actions .btn{ width:100%; }
  .kpi-grid{ grid-template-columns:1fr; }
  .cmp-col{ padding:22px 18px; }
  .step{ grid-template-columns:1fr; gap:12px; padding:20px; }
  .step-num{ font-size:28px; }
  .footer-grid{ grid-template-columns:1fr; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
  .accordion-title{ font-size:15px; padding:16px 52px 16px 18px; }
}