/* roulang page: index */
:root{
  --bg:#0A0B0D;
  --surface:#131519;
  --raised:#1B1E24;
  --line:#262A31;
  --line-soft:rgba(255,255,255,.06);
  --text:#F2F4F7;
  --muted:#A6AEBB;
  --weak:#6B7280;
  --accent:#FF5A1F;
  --accent-soft:rgba(255,90,31,.12);
  --volt:#2BE3C6;
  --volt-soft:rgba(43,227,198,.12);
  --lemon:#F5E14C;
  --inverse:#F4F1EC;
  --inverse-text:#16171A;
  --inverse-muted:#5B554D;
  --radius-sm:12px;
  --radius:16px;
  --radius-lg:20px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-display:"Space Grotesk",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:640px){.container{padding:0 16px}}

/* ---------- 顶部信息条 ---------- */
.topbar{background:#0F1115;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:38px;gap:16px}
.topbar-left{display:flex;align-items:center;gap:8px;font-family:var(--font-display);letter-spacing:.02em;color:var(--muted);white-space:nowrap}
.topbar-left svg{width:14px;height:14px;color:var(--volt)}
.topbar-mid{flex:1;text-align:center;color:var(--weak);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:18px;white-space:nowrap}
.topbar-link{color:var(--muted);transition:color .2s var(--ease)}
.topbar-link:hover{color:var(--accent)}
@media (max-width:860px){
  .topbar-mid{display:none}
  .topbar-right{gap:12px}
}
@media (max-width:420px){
  .topbar-left span.txt{display:none}
}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,11,13,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(120%) blur(0px);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.scrolled{box-shadow:0 8px 30px rgba(0,0,0,.5)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:19px;letter-spacing:-.02em;color:var(--text)}
.brand-mark{
  width:26px;height:26px;border-radius:8px;background:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:12px;height:12px;color:#0A0B0D}
.brand:hover .brand-mark{background:#FF6E3C;transform:translateY(-1px)}
.brand-mark{transition:background .2s var(--ease),transform .2s var(--ease)}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;display:inline-block;padding:8px 14px;border-radius:999px;
  font-size:15px;color:var(--muted);transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-link.is-active{color:var(--text);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:auto;bottom:2px;width:20px;height:2px;
  background:var(--accent);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:12px}
.menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-toggle span{display:block;width:16px;height:1.5px;background:var(--text);border-radius:2px;transition:transform .25s var(--ease),opacity .25s var(--ease)}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
@media (max-width:900px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .nav-actions .btn-sm{display:none}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;font-size:15px;font-weight:600;
  padding:14px 28px;line-height:1.2;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-primary{background:var(--accent);color:#12100E}
.btn-primary:hover{background:#FF6E3C;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-dark{background:#16171A;color:#F4F1EC}
.btn-dark:hover{background:#26272B;transform:translateY(-1px)}
.link-more{display:inline-flex;align-items:center;gap:6px;color:var(--accent);font-size:14px;font-weight:600}
.link-more svg{width:14px;height:14px;transition:transform .2s var(--ease)}
.link-more:hover svg{transform:translateX(4px)}

/* ---------- 通用区块 ---------- */
.section{padding:110px 0;border-top:1px solid var(--line-soft)}
.section:first-of-type{border-top:0}
@media (max-width:1024px){.section{padding:80px 0}}
@media (max-width:640px){.section{padding:58px 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-no{
  display:block;font-family:var(--font-display);font-size:12px;letter-spacing:.24em;
  color:var(--volt);margin-bottom:10px;text-transform:uppercase;
}
.section-title{font-size:32px;font-weight:800;letter-spacing:-.02em;line-height:1.25}
.section-title.on-inverse{color:var(--inverse-text)}
.section-desc{color:var(--muted);font-size:15px;margin-top:10px;max-width:560px}
@media (max-width:640px){.section-title{font-size:24px}}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:88px 0 96px;border-bottom:1px solid var(--line-soft)}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(118deg,transparent 49.75%,rgba(255,255,255,.05) 49.75%,rgba(255,255,255,.05) 50.25%,transparent 50.25%);
}
.hero::after{
  content:"PLAY";position:absolute;right:-30px;bottom:-70px;
  font-family:var(--font-display);font-size:220px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.06);
  pointer-events:none;user-select:none;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-copy{max-width:600px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;color:var(--volt);
  background:var(--volt-soft);border-radius:999px;padding:6px 14px;margin-bottom:22px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--volt);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.8)}}
.hero-title{font-size:56px;line-height:1.12;font-weight:800;letter-spacing:-.025em}
.hero-sub{font-size:18px;color:var(--muted);margin-top:20px;max-width:520px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-stats{display:flex;flex-wrap:wrap;gap:32px;margin-top:46px;padding-top:28px;border-top:1px solid var(--line)}
.hero-stats > div{display:flex;flex-direction:column;gap:2px}
.hero-stats strong{font-family:var(--font-display);font-size:20px;font-weight:700;letter-spacing:-.01em}
.hero-stats span{font-size:13px;color:var(--weak)}
.seal{
  display:inline-block;background:var(--lemon);color:#16171A;
  font-size:11px;font-weight:700;letter-spacing:.12em;padding:4px 8px;border-radius:4px;
}

.hero-stage{display:grid;grid-template-columns:1.15fr .88fr .88fr;gap:18px;align-items:end}
.stage-card{position:relative}
.stage-card.stage-sub{transform:translateY(34px)}
.ratio-9x16{position:relative;width:100%;aspect-ratio:9/16;overflow:hidden;border-radius:var(--radius-lg);background:var(--raised);border:1px solid var(--line)}
.ratio-9x16 img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease),filter .3s var(--ease)}
.stage-card:hover .ratio-9x16 img{transform:scale(1.03)}
.stage-card:hover .ratio-9x16{border-color:var(--accent)}
.stage-shade{position:absolute;inset:0;background:linear-gradient(to top,rgba(10,11,13,.92) 0%,rgba(10,11,13,.35) 32%,transparent 62%)}
.badge-time{
  position:absolute;top:12px;left:12px;z-index:3;
  background:rgba(43,227,198,.16);color:var(--volt);
  font-size:11px;font-weight:600;letter-spacing:.08em;
  padding:4px 9px;border-radius:6px;border:1px solid rgba(43,227,198,.3);
}
.play-dot{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:3;
  width:44px;height:44px;border-radius:50%;background:rgba(255,90,31,.92);
  display:flex;align-items:center;justify-content:center;
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.play-dot svg{width:15px;height:15px;color:#12100E;margin-left:2px}
.stage-card:hover .play-dot{transform:translate(-50%,-50%) scale(1.08)}
.stage-caption{position:absolute;left:14px;right:14px;bottom:14px;z-index:3;font-size:14px;font-weight:600;line-height:1.5}
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-title{font-size:44px}
  .hero-stage{grid-template-columns:1.1fr .9fr .9fr}
}
@media (max-width:900px){
  .hero{padding:60px 0 72px}
  .hero-title{font-size:34px}
  .hero-sub{font-size:16px}
  .hero-stage{
    display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:14px;
    padding-bottom:14px;margin:0 -16px;padding-left:16px;padding-right:16px;
    scrollbar-width:none;
  }
  .hero-stage::-webkit-scrollbar{display:none}
  .hero-stage .stage-card{flex:0 0 72vw;max-width:300px;scroll-snap-align:center;transform:none!important}
  .hero-stats{gap:22px;margin-top:34px}
}

/* ---------- 片段卡片网格 ---------- */
.clip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media (max-width:1024px){.clip-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.clip-grid{grid-template-columns:1fr}}
.clip-card{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.clip-card:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:0 12px 40px rgba(0,0,0,.45)}
.clip-cover{position:relative;aspect-ratio:3/4;overflow:hidden;background:var(--raised)}
.clip-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.clip-card:hover .clip-cover img{transform:scale(1.03)}
.clip-cover .stage-shade{opacity:.9}
.tag-hot{
  position:absolute;top:12px;right:12px;z-index:3;
  background:rgba(245,225,76,.14);color:var(--lemon);border:1px solid rgba(245,225,76,.28);
  font-size:11px;font-weight:600;padding:4px 9px;border-radius:6px;letter-spacing:.06em;
}
.clip-body{padding:16px 18px 18px}
.clip-title{font-size:16px;font-weight:700;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:50px}
.clip-meta{display:flex;align-items:center;justify-content:space-between;margin-top:14px;font-size:12px;color:var(--weak)}
.clip-tag{color:var(--volt);background:var(--volt-soft);border-radius:6px;padding:2px 8px;font-size:11px}

/* ---------- 反相种草清单 ---------- */
.inverse{background:var(--inverse);color:var(--inverse-text)}
.inverse .section-desc,.inverse .picks-sub{color:var(--inverse-muted)}
.picks-grid{display:grid;grid-template-columns:0.85fr 1.4fr;gap:56px;align-items:start}
.picks-intro{position:sticky;top:96px}
.picks-sub{font-size:15px;margin-top:14px;max-width:320px}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{
  font-size:13px;padding:7px 16px;border-radius:999px;
  border:1px solid rgba(22,23,26,.18);color:var(--inverse-muted);
  transition:all .2s var(--ease);background:transparent;
}
.chip:hover,.chip.is-on{background:#16171A;color:#F4F1EC;border-color:#16171A}
.pick-list{border-top:1px solid rgba(22,23,26,.14)}
.pick-row{
  display:grid;grid-template-columns:76px 1fr auto;gap:20px;align-items:center;
  padding:24px 12px;border-bottom:1px solid rgba(22,23,26,.14);
  transition:background .2s var(--ease),padding .2s var(--ease);
}
.pick-row:hover{background:rgba(22,23,26,.045)}
.pick-no{
  font-family:var(--font-display);font-size:38px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px rgba(22,23,26,.32);
}
.pick-title{font-size:18px;font-weight:700;letter-spacing:-.01em}
.pick-desc{font-size:14px;color:var(--inverse-muted);margin-top:4px}
.pick-go{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;
  color:var(--inverse-text);white-space:nowrap;
}
.pick-go svg{width:13px;height:13px;transition:transform .2s var(--ease)}
.pick-row:hover .pick-go svg{transform:translateX(4px)}
@media (max-width:1024px){
  .picks-grid{grid-template-columns:1fr;gap:36px}
  .picks-intro{position:static}
}
@media (max-width:640px){
  .pick-row{grid-template-columns:52px 1fr;gap:14px;padding:20px 6px}
  .pick-no{font-size:28px}
  .pick-go{grid-column:2;margin-top:6px}
}

/* ---------- 口碑跑马灯 ---------- */
.marquee{position:relative;overflow:hidden;padding:6px 0}
.marquee::before,.marquee::after{
  content:"";position:absolute;top:0;bottom:0;width:90px;z-index:2;pointer-events:none;
}
.marquee::before{left:0;background:linear-gradient(to right,var(--bg),transparent)}
.marquee::after{right:0;background:linear-gradient(to left,var(--bg),transparent)}
.marquee-track{display:flex;gap:18px;width:max-content;animation:marquee 46s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.voice-card{
  width:300px;flex:0 0 auto;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px;
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.voice-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.voice-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:38px;height:38px;border-radius:50%;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:700;font-size:14px;color:#12100E;
  background:var(--volt);
}
.voice-name{font-size:14px;font-weight:600}
.stars{display:flex;gap:2px;margin-top:2px}
.stars svg{width:12px;height:12px;color:var(--lemon)}
.voice-text{font-size:14px;color:var(--muted);line-height:1.7}

/* ---------- 最新信息 / CMS ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media (max-width:1024px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.news-grid{grid-template-columns:1fr}}
.news-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.news-card:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:0 12px 40px rgba(0,0,0,.45)}
.news-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--raised)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.03)}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.news-cat{
  align-self:flex-start;font-size:11px;letter-spacing:.08em;
  color:var(--accent);background:var(--accent-soft);border-radius:6px;padding:3px 9px;
}
.news-title{
  font-size:17px;font-weight:700;line-height:1.55;margin-top:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-sum{
  font-size:14px;color:var(--muted);margin-top:10px;line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line-soft);font-size:12px;color:var(--weak);
}
.news-foot svg{width:14px;height:14px;color:var(--accent);transition:transform .2s var(--ease)}
.news-card:hover .news-foot svg{transform:translateX(3px)}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:64px 24px;text-align:center;color:var(--weak);
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius);
}
.empty-state svg{width:32px;height:32px;color:var(--weak)}
.empty-state p{font-size:15px}
.empty-state a{color:var(--accent);font-weight:600;font-size:14px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;text-align:left;font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent)}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent);border-radius:2px;
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a-inner{padding:0 4px 24px;max-width:720px;color:var(--muted);font-size:15px;line-height:1.8}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--accent);color:#12100E;border-radius:24px;
  padding:56px 56px;display:flex;align-items:center;justify-content:space-between;gap:36px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border-radius:50%;border:1px solid rgba(18,16,14,.18);
}
.cta-band h2{font-size:30px;font-weight:800;letter-spacing:-.02em;line-height:1.3}
.cta-band p{margin-top:10px;font-size:15px;color:rgba(18,16,14,.78);max-width:520px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:2}
@media (max-width:860px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 26px;border-radius:20px}
  .cta-band h2{font-size:24px}
}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);margin-top:110px;background:#0C0D10}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:44px;padding:64px 0 48px}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:16px;max-width:280px}
.footer-domain{
  display:inline-block;margin-top:16px;font-family:var(--font-display);font-size:13px;
  color:var(--weak);letter-spacing:.04em;
}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--weak);text-transform:uppercase;margin-bottom:18px;font-weight:600}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14px;color:var(--muted);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.sub-form{margin-top:4px}
.sub-form label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.sub-row{display:flex;gap:10px}
.sub-row input{
  flex:1;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;color:var(--text);font-size:14px;transition:border-color .2s var(--ease);
}
.sub-row input::placeholder{color:var(--weak)}
.sub-row input:focus{outline:none;border-color:var(--accent)}
.sub-note{font-size:12px;color:var(--weak);margin-top:10px}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0}
.footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:var(--weak);flex-wrap:wrap}
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:48px 0 36px}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .site-footer{margin-top:70px}
}

/* ---------- 移动端抽屉 ---------- */
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:min(88vw,360px);z-index:90;
  background:#0C0D10;border-right:1px solid var(--line);
  transform:translateX(-102%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:22px;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line)}
.drawer-close{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--muted)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-top:24px}
.drawer-nav a{
  padding:14px 8px;font-size:16px;color:var(--muted);border-radius:10px;
  border-bottom:1px solid var(--line-soft);transition:color .2s var(--ease),background .2s var(--ease);
}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--text);background:rgba(255,255,255,.03)}
.drawer-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--line);font-size:13px;color:var(--weak)}
.drawer-foot .btn{width:100%;margin-bottom:14px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer-mask.open{opacity:1;visibility:visible}

/* ---------- 移动吸底 CTA ---------- */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:#0C0D10;border-top:1px solid var(--line);
  padding:10px 16px;display:none;
}
.sticky-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:14px}
.sticky-cta span{font-size:13px;color:var(--muted);line-height:1.4}
@media (max-width:900px){
  .sticky-cta{display:block}
  body{padding-bottom:84px}
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#FF5A1F;
  --brand-hover:#FF7038;
  --brand-soft:rgba(255,90,31,.12);
  --cyan:#2BE3C6;
  --cyan-soft:rgba(43,227,198,.12);
  --lemon:#F5E14C;
  --bg:#0A0B0D;
  --bg-top:#0F1115;
  --surface:#131519;
  --surface-2:#1B1E24;
  --line:#262A31;
  --text:#F2F4F7;
  --text-2:#A6AEBB;
  --text-3:#6B7280;
  --paper:#F4F1EC;
  --paper-text:#16171A;
  --paper-sub:#5B554D;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shadow-card:0 12px 40px rgba(0,0,0,.45);
  --shadow-paper:0 2px 8px rgba(20,20,20,.06);
  --ease:cubic-bezier(.2,.8,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Space Grotesk","PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
button{font:inherit;cursor:pointer}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
::selection{background:var(--brand);color:#1A0E08}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#0F1115}
::-webkit-scrollbar-thumb{background:#2B303A;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:#3A414D}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部信息条 ---------- */
.topbar{height:38px;background:var(--bg-top);border-bottom:1px solid var(--line);overflow:hidden;transition:height .2s var(--ease),opacity .2s var(--ease)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:38px;gap:16px;font-size:13px;color:var(--text-3)}
.topbar-domain{display:inline-flex;align-items:center;gap:7px;color:var(--text-2);white-space:nowrap}
.topbar-domain svg{width:14px;height:14px;color:var(--brand);flex:none}
.topbar-tip{color:var(--text-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-actions{display:flex;align-items:center;gap:18px;white-space:nowrap}
.topbar-link{color:var(--text-2);transition:color .2s var(--ease)}
.topbar-link:hover{color:var(--brand)}
.topbar-link-accent{color:var(--brand)}
.topbar-link-accent:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(10,11,13,.94);transition:background .2s var(--ease)}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:transparent;transition:background .2s var(--ease)}
.site-header.is-scrolled{background:#0A0B0D}
.site-header.is-scrolled::after{background:var(--line)}
.site-header.is-scrolled .topbar{height:0;opacity:0;border-color:transparent}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:70px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:800;font-size:19px;letter-spacing:-.02em}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:var(--brand);color:#1A0E08;flex:none;transition:background .2s var(--ease)}
.brand-mark svg{width:15px;height:15px}
.brand:hover .brand-mark{background:var(--brand-hover)}
.main-nav{display:flex;align-items:center;gap:30px}
.nav-link{position:relative;font-size:15px;color:var(--text-2);padding:6px 0;transition:color .2s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);transition:width .2s var(--ease)}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:20px}
.nav-link.is-active{color:var(--text);font-weight:600}
.nav-link.is-active::after{width:20px}
.nav-actions{display:flex;align-items:center;gap:12px}
.hamburger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:transparent;flex-direction:column;align-items:center;justify-content:center;gap:5px;transition:border-color .2s var(--ease)}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s var(--ease)}
.hamburger:hover{border-color:var(--brand)}
.hamburger:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;font-weight:600;font-size:15px;padding:14px 28px;border:1px solid transparent;transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);cursor:pointer}
.btn-primary{background:var(--brand);color:#1A0E08}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-dark{background:#16171A;color:#F4F1EC}
.btn-dark:hover{background:#26282D;transform:translateY(-1px)}
.btn-dark:active{transform:translateY(1px)}
.btn-outline-dark{background:transparent;border-color:rgba(22,23,26,.24);color:var(--paper-text)}
.btn-outline-dark:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:14px}
.link-arrow .arr{transition:transform .2s var(--ease)}
.link-arrow:hover .arr{transform:translateX(4px)}

/* ---------- 分类页头图 ---------- */
.cat-hero{position:relative;overflow:hidden;background:var(--surface);min-height:300px;display:flex;align-items:flex-end}
.cat-hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.48}
.cat-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,11,13,.70) 0%,rgba(10,11,13,.90) 68%,var(--bg) 100%)}
.cat-hero-inner{position:relative;z-index:2;padding-top:56px;padding-bottom:54px;max-width:900px}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--text-3);margin-bottom:18px}
.breadcrumb a{color:var(--text-3);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.12em;font-weight:600;color:var(--brand);background:var(--brand-soft);border:1px solid rgba(255,90,31,.28);border-radius:6px;padding:5px 12px;margin-bottom:18px}
.hero-title{font-size:44px;line-height:1.18;font-weight:800;letter-spacing:-.02em;color:#fff}
.hero-lead{margin-top:18px;font-size:17px;line-height:1.8;color:var(--text-2);max-width:740px}

/* ---------- 信任数据条 ---------- */
.trust{margin-top:-30px;position:relative;z-index:3}
.trust-inner{display:grid;grid-template-columns:repeat(4,1fr);background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}
.trust-item{padding:22px 24px;border-right:1px solid var(--line)}
.trust-item:last-child{border-right:0}
.trust-num{font-size:26px;font-weight:800;letter-spacing:-.02em;color:#fff;line-height:1.2}
.trust-num em{font-style:normal;color:var(--brand)}
.trust-label{margin-top:6px;font-size:13px;color:var(--text-2);line-height:1.6}

/* ---------- 主体两栏 ---------- */
.section{padding:80px 0}
.section-tight{padding:56px 0}
.cat-body{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start}
.cat-side{position:sticky;top:118px;display:flex;flex-direction:column;gap:18px}
.filter-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:20px}
.filter-title{font-size:12px;letter-spacing:.12em;font-weight:600;color:var(--text-3)}
.filter-title.mt{margin-top:24px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{display:inline-flex;align-items:center;padding:7px 13px;border-radius:999px;border:1px solid var(--line);font-size:13px;color:var(--text-2);transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease)}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.is-on{background:var(--brand-soft);border-color:rgba(255,90,31,.5);color:var(--brand)}
.side-list{margin-top:12px;display:flex;flex-direction:column}
.side-list li a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--text-2);transition:color .2s var(--ease),padding .2s var(--ease)}
.side-list li:last-child a{border-bottom:0}
.side-list li a:hover{color:var(--brand);padding-left:4px}
.side-list li a span{color:var(--text-3);font-size:12px}
.side-note{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-md);padding:20px}
.side-note-badge{display:inline-block;font-size:11px;letter-spacing:.12em;font-weight:600;color:var(--lemon);background:rgba(245,225,76,.12);border:1px solid rgba(245,225,76,.3);border-radius:6px;padding:3px 8px;margin-bottom:12px}
.side-note p{font-size:13.5px;line-height:1.75;color:var(--text-2)}

/* ---------- 板块标题 ---------- */
.section-head{margin-bottom:28px}
.section-title{display:flex;align-items:center;gap:12px;font-size:32px;font-weight:800;letter-spacing:-.02em;color:#fff;line-height:1.3}
.section-title .num{font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--brand);border:1px solid rgba(255,90,31,.4);border-radius:6px;padding:3px 8px;flex:none}
.section-sub{margin-top:10px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:660px}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}
.card:hover{transform:translateY(-2px);border-color:rgba(255,90,31,.55);box-shadow:var(--shadow-card)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-badge{position:absolute;left:12px;top:12px;font-size:11px;letter-spacing:.08em;font-weight:600;padding:4px 10px;border-radius:6px;background:rgba(10,11,13,.74);color:var(--cyan);border:1px solid rgba(43,227,198,.35)}
.card-body{padding:18px}
.card-title{font-size:18px;font-weight:700;line-height:1.45;color:#fff;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-text{margin-top:8px;font-size:14px;line-height:1.7;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12.5px;color:var(--text-3)}
.card-foot b{color:var(--cyan);font-weight:600}

/* ---------- 四步流程 ---------- */
.flow-wrap{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.flow-item{padding-top:16px;border-top:2px solid var(--line);transition:border-color .2s var(--ease)}
.flow-item:hover{border-color:var(--brand)}
.flow-num{font-size:40px;font-weight:800;line-height:1;letter-spacing:-.04em;color:transparent;-webkit-text-stroke:1px rgba(242,244,247,.3)}
.flow-title{margin-top:12px;font-size:18px;font-weight:700;color:#fff;line-height:1.45}
.flow-text{margin-top:8px;font-size:14px;line-height:1.75;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq-list{max-width:840px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:56px;padding:16px 0;font-size:16.5px;font-weight:600;color:var(--text);list-style:none;cursor:pointer;transition:color .2s var(--ease)}
.faq-q::-webkit-details-marker{display:none}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:relative;width:20px;height:20px;flex:none;transition:transform .2s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-a{padding:0 0 22px;max-width:720px;font-size:15.5px;line-height:1.8;color:var(--text-2)}

/* ---------- 反相行动区 ---------- */
.paper-block{background:var(--paper);color:var(--paper-text);border-radius:var(--r-lg);padding:52px;box-shadow:var(--shadow-paper)}
.paper-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center}
.paper-title{font-size:32px;font-weight:800;letter-spacing:-.02em;line-height:1.28;color:var(--paper-text)}
.paper-text{margin-top:14px;font-size:15.5px;line-height:1.8;color:var(--paper-sub);max-width:580px}
.paper-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.paper-side{border-left:1px solid rgba(22,23,26,.12);padding-left:32px;display:flex;flex-direction:column;gap:16px}
.paper-point{display:flex;align-items:flex-start;gap:10px;font-size:14.5px;line-height:1.7;color:var(--paper-sub)}
.paper-point i{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:999px;background:var(--brand);color:#1A0E08;font-size:11px;font-style:normal;font-weight:700;flex:none;margin-top:3px}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:#08090B}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;padding-top:64px;padding-bottom:56px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.75;color:var(--text-2);max-width:320px}
.footer-domain{display:inline-block;margin-top:14px;font-size:13px;color:var(--text-3)}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:var(--text-2);transition:color .2s var(--ease)}
.footer-col ul a:hover{color:var(--brand)}
.sub-form label{display:block;font-size:13px;line-height:1.7;color:var(--text-2);margin-bottom:12px}
.sub-row{display:flex;gap:8px}
.sub-row input{flex:1;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);padding:11px 14px;font-size:14px;font-family:inherit;color:var(--text);transition:border-color .2s var(--ease)}
.sub-row input::placeholder{color:var(--text-3)}
.sub-row input:focus{outline:none;border-color:var(--brand)}
.sub-note{margin-top:10px;font-size:12.5px;color:var(--text-3)}
.sub-note.is-error{color:var(--brand)}
.footer-bottom{border-top:1px solid var(--line)}
.footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:20px;padding-bottom:20px;font-size:13px;color:var(--text-3)}

/* ---------- 移动抽屉 ---------- */
.drawer{position:fixed;inset:0;z-index:90;background:rgba(10,11,13,.65);opacity:0;visibility:hidden;transition:opacity .2s var(--ease),visibility .2s var(--ease)}
.drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{position:absolute;top:0;right:0;width:min(360px,86vw);height:100%;background:#0F1115;border-left:1px solid var(--line);padding:22px;display:flex;flex-direction:column;transform:translateX(100%);transition:transform .3s var(--ease);overflow-y:auto}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:transparent;color:var(--text);font-size:16px;line-height:1;transition:border-color .2s var(--ease),color .2s var(--ease)}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{padding:15px 0;border-bottom:1px solid var(--line);font-size:16px;color:var(--text-2);transition:color .2s var(--ease)}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--brand)}
.drawer-foot{margin-top:auto;padding-top:24px;display:flex;flex-direction:column;gap:14px;font-size:12.5px;color:var(--text-3)}

/* ---------- 移动吸底条 ---------- */
.mobile-bar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;height:64px;background:#0F1115;border-top:1px solid var(--line);align-items:center;justify-content:space-between;gap:12px;padding:0 16px}
.mobile-bar-text{font-size:12.5px;line-height:1.4;color:var(--text-2)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .cat-body{grid-template-columns:1fr}
  .cat-side{position:static;flex-direction:row;flex-wrap:wrap;gap:16px}
  .cat-side > *{flex:1 1 280px}
  .flow-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .paper-grid{grid-template-columns:1fr;gap:28px}
  .paper-side{border-left:0;border-top:1px solid rgba(22,23,26,.12);padding-left:0;padding-top:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .main-nav{display:none}
  .hamburger{display:flex}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .hero-title{font-size:30px}
  .hero-lead{font-size:15.5px}
  .cat-hero-inner{padding-top:38px;padding-bottom:44px}
  .section-title{font-size:24px}
  .paper-block{padding:30px}
  .paper-title{font-size:24px}
  .trust{margin-top:-20px}
  .trust-inner{grid-template-columns:1fr 1fr}
  .trust-item{padding:18px 18px}
  .trust-item:nth-child(1),.trust-item:nth-child(2){border-bottom:1px solid var(--line)}
  .trust-item:nth-child(2){border-right:0}
  .flow-grid{grid-template-columns:1fr;gap:22px}
  .mobile-bar{display:flex}
  body{padding-bottom:64px}
  .footer-grid{padding-top:48px;padding-bottom:40px}
}
@media (max-width:560px){
  .container{padding:0 16px}
  .card-grid{grid-template-columns:1fr}
  .topbar-tip{display:none}
  .nav-cta{display:none}
  .footer-grid{grid-template-columns:1fr}
  .card-title{font-size:17px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

.reveal{opacity:1;transform:none}

/* roulang page: article */
:root{
  --bg:#0A0B0D;
  --surface:#131519;
  --surface-2:#1B1E24;
  --border:#262A31;
  --primary:#FF5A1F;
  --primary-hover:#FF6F3C;
  --primary-soft:rgba(255,90,31,.12);
  --accent:#2BE3C6;
  --accent-soft:rgba(43,227,198,.12);
  --lemon:#F5E14C;
  --text:#F2F4F7;
  --text-2:#A6AEBB;
  --text-weak:#6B7280;
  --paper:#F4F1EC;
  --ink:#16171A;
  --ink-2:#5B554D;
  --radius:16px;
  --radius-sm:12px;
  --radius-lg:20px;
  --shadow:0 12px 40px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.8,.2,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
::selection{background:var(--primary);color:#0A0B0D;}

/* ============ 顶部信息条 ============ */
.topbar{background:#0F1115;border-bottom:1px solid var(--border);font-size:13px;color:var(--text-2);}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:38px;}
.topbar-domain{display:inline-flex;align-items:center;gap:8px;color:var(--text-2);white-space:nowrap;}
.topbar-domain svg{width:14px;height:14px;color:var(--accent);flex:0 0 auto;}
.topbar-tip{color:var(--text-weak);white-space:nowrap;}
.topbar-actions{display:flex;align-items:center;gap:20px;white-space:nowrap;}
.topbar-link{color:var(--text-2);transition:color .2s var(--ease);}
.topbar-link:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.topbar-link-strong{color:var(--text);font-weight:600;}

/* ============ 主导航 ============ */
.site-header{position:sticky;top:0;z-index:50;background:rgba(10,11,13,.96);border-bottom:1px solid var(--border);transition:box-shadow .2s var(--ease);}
.site-header.is-scrolled{box-shadow:0 8px 28px rgba(0,0,0,.45);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em;color:#fff;}
.brand-mark{width:30px;height:30px;border-radius:9px;background:var(--primary);color:#0A0B0D;display:grid;place-items:center;flex:0 0 auto;}
.brand-mark svg{width:16px;height:16px;}
.main-nav{display:flex;align-items:center;gap:28px;}
.nav-link{position:relative;font-size:15px;color:var(--text-2);padding:6px 0;transition:color .2s var(--ease);white-space:nowrap;}
.nav-link:hover{color:#fff;}
.nav-link.is-active{color:#fff;font-weight:600;}
.nav-link.is-active::after{content:"";position:absolute;left:0;bottom:-2px;width:20px;height:2px;border-radius:2px;background:var(--primary);}
.header-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--border);background:var(--surface);align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;transition:border-color .2s var(--ease);}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;}
.nav-toggle:hover{border-color:var(--primary);}
.nav-toggle:focus-visible,.btn:focus-visible,.nav-link:focus-visible,a:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;font-weight:600;font-size:15px;padding:14px 28px;cursor:pointer;text-align:center;
  transition:transform .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);}
.btn-sm{padding:9px 20px;font-size:14px;}
.btn-primary{background:var(--primary);color:#0A0B0D;}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text);}
.btn-ghost:hover{border-color:var(--primary);color:#fff;transform:translateY(-1px);}
.btn-dark{background:var(--ink);color:var(--paper);}
.btn-dark:hover{background:#22242a;transform:translateY(-1px);}
.btn-block{width:100%;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:14px;}
.link-arrow svg{width:16px;height:16px;transition:transform .2s var(--ease);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ============ 移动端抽屉 ============ */
.nav-drawer{position:fixed;inset:0;z-index:90;background:#0A0B0D;transform:translateX(100%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:18px 22px 34px;overflow-y:auto;}
.nav-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--border);}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--border);background:transparent;color:var(--text);font-size:22px;line-height:1;cursor:pointer;}
.drawer-close:hover{border-color:var(--primary);color:var(--primary);}
.drawer-nav{display:flex;flex-direction:column;padding:14px 0;flex:1 1 auto;}
.drawer-nav a{padding:16px 0;font-size:17px;color:var(--text);border-bottom:1px solid var(--border);}
.drawer-nav a:hover{color:var(--primary);}
.drawer-foot{padding-top:22px;display:flex;flex-direction:column;gap:14px;}
.drawer-foot span{font-size:13px;color:var(--text-weak);}

/* ============ 面包屑 ============ */
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--text-weak);padding:24px 0 0;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.crumb-current{color:var(--text-weak);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头部 ============ */
.article-head{padding:26px 0 34px;border-bottom:1px solid var(--border);}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;letter-spacing:.08em;padding:5px 12px;border-radius:999px;}
.badge-primary{background:var(--primary-soft);color:var(--primary);}
.badge-accent{background:var(--accent-soft);color:var(--accent);}
.article-title{font-size:44px;line-height:1.22;font-weight:800;letter-spacing:-.02em;margin:16px 0 18px;color:#fff;max-width:20ch;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--text-weak);}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--border);}

/* ============ 文章布局 ============ */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start;padding:44px 0 0;}
.article-main{min-width:0;}

/* ============ 正文排版 ============ */
.article-body{font-size:17px;line-height:1.9;color:var(--text);}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 1.5em;color:#DDE2EA;}
.article-body h2{font-size:26px;line-height:1.45;font-weight:800;letter-spacing:-.01em;color:#fff;margin:2em 0 .8em;position:relative;padding-left:16px;}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:2px;background:var(--primary);}
.article-body h3{font-size:20px;line-height:1.5;font-weight:700;color:#fff;margin:1.7em 0 .6em;}
.article-body h4{font-size:17px;font-weight:700;color:#fff;margin:1.4em 0 .5em;}
.article-body a{color:var(--primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;}
.article-body a:hover{color:var(--primary-hover);}
.article-body strong{color:#fff;font-weight:700;}
.article-body ul{list-style:none;margin:0 0 1.5em;padding-left:0;}
.article-body ul>li{position:relative;padding-left:1.5em;margin-bottom:.6em;}
.article-body ul>li::before{content:"";position:absolute;left:.15em;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--primary);}
.article-body ol{list-style:none;counter-reset:cmsli;margin:0 0 1.5em;padding-left:0;}
.article-body ol>li{counter-increment:cmsli;position:relative;padding-left:2.2em;margin-bottom:.7em;}
.article-body ol>li::before{content:counter(cmsli,decimal-leading-zero);position:absolute;left:0;top:0;font-size:13px;font-weight:700;color:var(--primary);letter-spacing:.06em;}
.article-body blockquote{margin:1.8em 0;padding:20px 24px;border-left:3px solid var(--primary);background:var(--paper);color:var(--ink);border-radius:0 12px 12px 0;}
.article-body blockquote p{color:var(--ink-2);margin-bottom:.6em;}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:12px;margin:1.6em auto;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--text-weak);text-align:center;margin-top:10px;}
.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(--border);padding:10px 14px;text-align:left;}
.article-body thead th{background:var(--surface-2);color:#fff;font-weight:700;}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.025);}
.article-body hr{border:0;border-top:1px solid var(--border);margin:2.4em 0;}
.article-body code{background:var(--surface-2);border-radius:6px;padding:2px 6px;font-size:.9em;color:var(--accent);}
.article-body pre{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px 18px;overflow-x:auto;font-size:14px;line-height:1.7;}

/* ============ 文章标签 ============ */
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:42px;padding-top:28px;border-top:1px solid var(--border);}
.tag{font-size:13px;color:var(--text-2);background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:6px 14px;transition:border-color .2s var(--ease),color .2s var(--ease);}
.tag:hover{border-color:var(--primary);color:#fff;}

/* ============ 空状态 ============ */
.empty-state{border:1px dashed var(--border);border-radius:var(--radius);background:var(--surface);padding:56px 28px;text-align:center;}
.empty-state svg{width:40px;height:40px;color:var(--text-weak);margin:0 auto 16px;}
.empty-state h2{font-size:20px;font-weight:700;color:#fff;margin-bottom:8px;}
.empty-state p{color:var(--text-2);font-size:15px;margin:0 0 22px;}

/* ============ 侧栏 ============ */
.article-side{position:sticky;top:92px;display:flex;flex-direction:column;gap:18px;}
.side-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;}
.side-title{display:flex;align-items:center;justify-content:space-between;font-size:12px;letter-spacing:.12em;color:var(--text-weak);font-weight:600;margin-bottom:14px;}
.side-title b{color:var(--accent);font-weight:600;letter-spacing:0;}
.toc-list{list-style:none;}
.toc-list li+li{margin-top:2px;}
.toc-link{display:block;font-size:14px;line-height:1.5;color:var(--text-2);padding:7px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);}
.toc-link:hover{color:#fff;background:var(--surface-2);}
.toc-link.is-current{color:var(--primary);border-left-color:var(--primary);background:var(--primary-soft);}
.side-hint{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:16px;}
.side-links{display:flex;flex-direction:column;gap:10px;}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px;color:var(--text);background:var(--surface-2);border:1px solid transparent;border-radius:10px;padding:11px 14px;transition:border-color .2s var(--ease),color .2s var(--ease);}
.side-links a:hover{border-color:var(--primary);color:#fff;}
.side-links a span{color:var(--text-weak);font-size:12px;}

/* ============ 相关推荐 ============ */
.related{margin-top:72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.section-head h2{font-size:28px;font-weight:800;letter-spacing:-.02em;color:#fff;}
.section-head p{font-size:14px;color:var(--text-2);margin:6px 0 0;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.post-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);}
.post-card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:var(--shadow);}
.post-cover{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.post-card:hover .post-cover img{transform:scale(1.03);}
.post-body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.post-body h3{font-size:17px;font-weight:700;line-height:1.5;color:#fff;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body p{font-size:14px;color:var(--text-2);line-height:1.7;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-weak);padding-top:6px;}

/* ============ FAQ ============ */
.faq-section{margin-top:88px;}
.faq-list{max-width:840px;margin:0 auto;border-top:1px solid var(--border);}
.faq-item{border-bottom:1px solid var(--border);}
.faq-q{width:100%;background:none;border:0;min-height:56px;padding:16px 4px;display:flex;align-items:center;justify-content:space-between;gap:20px;
  color:var(--text);font-size:17px;font-weight:600;text-align:left;cursor:pointer;transition:color .2s var(--ease);}
.faq-q:hover{color:var(--primary);}
.plus{position:relative;flex:0 0 auto;width:20px;height:20px;transition:transform .25s var(--ease);}
.plus::before,.plus::after{content:"";position:absolute;background:var(--primary);border-radius:2px;}
.plus::before{left:0;right:0;top:9px;height:2px;}
.plus::after{top:0;bottom:0;left:9px;width:2px;}
.faq-item.is-open .plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a-inner{padding:0 4px 22px;color:var(--text-2);font-size:15px;line-height:1.8;max-width:720px;}

/* ============ CTA ============ */
.cta-band{margin-top:96px;border-radius:var(--radius-lg);background:var(--paper);color:var(--ink);padding:48px;display:flex;align-items:center;justify-content:space-between;gap:36px;}
.cta-band h2{font-size:32px;font-weight:800;letter-spacing:-.02em;line-height:1.3;margin-bottom:10px;}
.cta-band p{color:var(--ink-2);font-size:15px;margin:0;max-width:52ch;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--border);margin-top:96px;background:#0C0D10;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.5fr;gap:40px;padding:64px 24px 48px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.75;margin:0 0 14px;max-width:34ch;}
.footer-domain{display:inline-block;font-size:12px;color:var(--text-weak);background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:4px 12px;letter-spacing:.04em;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin:0 0 16px;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--primary);}
.sub-form label{display:block;font-size:14px;color:var(--text-2);line-height:1.7;margin-bottom:12px;}
.sub-row{display:flex;gap:10px;}
.sub-row input{flex:1 1 auto;min-width:0;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:11px 14px;color:var(--text);font-size:14px;outline:none;transition:border-color .2s var(--ease);}
.sub-row input::placeholder{color:var(--text-weak);}
.sub-row input:focus{border-color:var(--primary);}
.sub-note{font-size:12px;color:var(--text-weak);margin:10px 0 0;}
.sub-note.is-error{color:var(--primary);}
.footer-bottom{border-top:1px solid var(--border);}
.footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;font-size:13px;color:var(--text-weak);flex-wrap:wrap;}

/* ============ 移动端吸底 ============ */
.mobile-cta{display:none;}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .article-layout{grid-template-columns:1fr;gap:40px;}
  .article-side{position:static;}
  .article-title{font-size:36px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:860px){
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .topbar-tip{display:none;}
  .topbar-actions{gap:14px;}
  .header-actions .btn{display:none;}
  .article-title{font-size:30px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px;}
  .related-grid{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px 24px;}
  .cta-band h2{font-size:26px;}
  .mobile-cta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;height:64px;align-items:center;justify-content:space-between;gap:12px;
    padding:0 16px;background:#0A0B0D;border-top:1px solid var(--border);}
  .mobile-cta span{font-size:13px;color:var(--text-2);}
  body{padding-bottom:76px;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .header-inner{height:62px;}
  .brand{font-size:17px;}
  .article-title{font-size:27px;}
  .article-head{padding:20px 0 26px;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:22px;}
  .article-body h3{font-size:18px;}
  .crumb-current{max-width:34ch;}
  .footer-grid{grid-template-columns:1fr;padding:48px 16px 36px;}
  .footer-bottom-inner{padding:18px 16px;}
  .empty-state{padding:40px 20px;}
  .cta-band{padding:28px 20px;}
}

/* roulang page: category2 */
:root{
    --bg:#0A0B0D;
    --surface:#131519;
    --raise:#1B1E24;
    --line:#262A31;
    --line-soft:rgba(38,42,49,.65);
    --brand:#FF5A1F;
    --brand-hi:#FF6E38;
    --brand-soft:rgba(255,90,31,.12);
    --cyan:#2BE3C6;
    --cyan-soft:rgba(43,227,198,.12);
    --yellow:#F5E14C;
    --text:#F2F4F7;
    --muted:#A6AEBB;
    --faint:#6B7280;
    --warm:#F4F1EC;
    --warm-2:#E7E1D8;
    --ink:#16171A;
    --ink-2:#5B554D;
    --r-xl:20px;
    --r-lg:16px;
    --r-sm:12px;
    --ease:cubic-bezier(.2,.8,.2,1);
    --font-cn: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  button{ font-family:inherit; }
  ::selection{ background:var(--brand); color:#160A04; }

  .container{
    width:100%;
    max-width:1200px !important;
    margin-left:auto;
    margin-right:auto;
    padding-left:24px;
    padding-right:24px;
  }

  :focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:6px;
  }

  /* ---------- 顶部信息条 ---------- */
  .topbar{
    background:#0F1115;
    border-bottom:1px solid var(--line);
    font-size:13px;
    color:var(--muted);
  }
  .topbar-inner{
    display:flex;
    align-items:center;
    gap:16px;
    height:40px;
    white-space:nowrap;
  }
  .topbar-domain{
    display:inline-flex;
    align-items:center;
    gap:7px;
    color:var(--text);
    font-weight:600;
    letter-spacing:.01em;
    letter-spacing:.02em;
    flex:none;
  }
  .topbar-domain svg{ width:14px; height:14px; color:var(--brand); }
  .topbar-tip{
    flex:1;
    min-width:0;
    overflow:hidden;
    text-overflow:ellipsis;
    color:var(--faint);
  }
  .topbar-actions{ display:flex; align-items:center; gap:18px; flex:none; }
  .topbar-link{
    color:var(--muted);
    transition:color .2s var(--ease);
    border-bottom:1px solid transparent;
    padding-bottom:1px;
  }
  .topbar-link:hover{ color:var(--brand); border-bottom-color:var(--brand); }
  .topbar-link-strong{ color:var(--brand); font-weight:600; }

  /* ---------- 主导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(10,11,13,.95);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    display:flex;
    align-items:center;
    gap:20px;
    height:72px;
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-size:18px;
    font-weight:800;
    letter-spacing:-.02em;
    color:var(--text);
    flex:none;
  }
  .brand-mark{
    width:30px;
    height:30px;
    border-radius:9px;
    background:var(--brand);
    color:#180C05;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    transition:transform .2s var(--ease);
  }
  .brand-mark svg{ width:16px; height:16px; }
  .brand:hover .brand-mark{ transform:translateY(-1px) scale(1.04); }

  .main-nav{
    display:flex;
    align-items:center;
    gap:4px;
    margin-left:14px;
  }
  .nav-link{
    position:relative;
    display:inline-block;
    padding:9px 14px;
    border-radius:999px;
    font-size:15px;
    color:var(--muted);
    transition:color .2s var(--ease), background-color .2s var(--ease);
  }
  .nav-link:hover{ color:var(--text); background:var(--raise); }
  .nav-link.is-active{ color:var(--text); font-weight:600; }
  .nav-link.is-active::after{
    content:"";
    position:absolute;
    left:14px;
    bottom:3px;
    width:20px;
    height:2px;
    border-radius:2px;
    background:var(--brand);
  }
  .header-right{ margin-left:auto; display:flex; align-items:center; gap:12px; }

  .menu-toggle{
    display:none;
    width:42px;
    height:42px;
    align-items:center;
    justify-content:center;
    border:1px solid var(--line);
    border-radius:12px;
    background:transparent;
    color:var(--text);
    cursor:pointer;
    transition:border-color .2s var(--ease);
  }
  .menu-toggle:hover{ border-color:var(--brand); }
  .menu-toggle svg{ width:20px; height:20px; }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:14px 28px;
    border-radius:999px;
    border:1px solid transparent;
    font-size:15px;
    font-weight:600;
    line-height:1.2;
    cursor:pointer;
    transition:background-color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease), color .2s var(--ease);
  }
  .btn-primary{ background:var(--brand); color:#180B04; }
  .btn-primary:hover{ background:var(--brand-hi); transform:translateY(-1px); }
  .btn-primary:active{ transform:translateY(1px); }
  .btn-ghost{ background:transparent; border-color:var(--line); color:var(--text); }
  .btn-ghost:hover{ border-color:var(--brand); color:var(--brand); transform:translateY(-1px); }
  .btn-ghost:active{ transform:translateY(1px); }
  .btn-dark{ background:var(--ink); color:var(--warm); }
  .btn-dark:hover{ background:#000; transform:translateY(-1px); }
  .btn-sm{ padding:10px 20px; font-size:14px; }
  .btn-lg{ padding:16px 34px; font-size:16px; }

  .link-arrow{
    display:inline-flex;
    align-items:center;
    gap:6px;
    color:var(--brand);
    font-weight:600;
    font-size:14px;
  }
  .link-arrow svg{ width:15px; height:15px; transition:transform .2s var(--ease); }
  .link-arrow:hover svg{ transform:translateX(4px); }

  /* ---------- 徽章 / 标签 ---------- */
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 11px;
    border-radius:6px;
    font-size:11.5px;
    font-weight:600;
    letter-spacing:.08em;
    background:var(--brand-soft);
    color:#FF9163;
  }
  .badge-cyan{ background:var(--cyan-soft); color:var(--cyan); }
  .badge-line{ background:rgba(166,174,187,.10); color:var(--muted); }
  .badge-lime{ background:rgba(245,225,76,.14); color:var(--yellow); }
  .seal{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:44px;
    height:44px;
    border:1px solid var(--brand);
    border-radius:8px;
    color:var(--brand);
    font-size:12px;
    font-weight:700;
    letter-spacing:.1em;
    line-height:1.15;
    text-align:center;
  }

  /* ---------- 内页头图 ---------- */
  .page-hero{
    position:relative;
    min-height:310px;
    display:flex;
    align-items:flex-end;
    overflow:hidden;
    border-bottom:1px solid var(--line);
  }
  .page-hero-bg{
    position:absolute;
    inset:0;
    background-size:cover;
    background-position:center;
    transform:scale(1.02);
  }
  .page-hero-mask{
    position:absolute;
    inset:0;
    background:linear-gradient(180deg, rgba(10,11,13,.72) 0%, rgba(10,11,13,.88) 62%, rgba(10,11,13,.98) 100%);
  }
  .page-hero-inner{
    position:relative;
    padding-top:56px;
    padding-bottom:44px;
  }
  .breadcrumb{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:8px;
    font-size:13px;
    color:var(--faint);
    margin-bottom:18px;
  }
  .breadcrumb a{ color:var(--muted); transition:color .2s var(--ease); }
  .breadcrumb a:hover{ color:var(--brand); }
  .breadcrumb .sep{ color:#3A4049; }
  .page-title{
    margin:14px 0 14px;
    font-size:44px;
    line-height:1.22;
    font-weight:800;
    letter-spacing:-.02em;
    max-width:900px;
  }
  .page-sub{
    margin:0;
    font-size:16px;
    color:var(--muted);
    max-width:640px;
  }

  /* ---------- 通用板块 ---------- */
  .section{ padding:96px 0; }
  .section-tight{ padding:64px 0; }
  .section-head{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:24px;
    flex-wrap:wrap;
    margin-bottom:36px;
  }
  .section-index{
    font-size:13px;
    font-weight:700;
    letter-spacing:.14em;
    color:var(--brand);
    margin-bottom:10px;
    display:block;
  }
  .section-title{
    margin:0;
    font-size:32px;
    line-height:1.3;
    font-weight:800;
    letter-spacing:-.02em;
  }
  .section-desc{
    margin:12px 0 0;
    color:var(--muted);
    max-width:660px;
    font-size:15.5px;
  }

  /* ---------- 导语 + 数据条 ---------- */
  .intro-grid{
    display:grid;
    grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
    gap:52px;
    align-items:start;
  }
  .intro-text p{
    margin:0 0 18px;
    color:var(--muted);
    font-size:16.5px;
    line-height:1.85;
  }
  .intro-text p:last-child{ margin-bottom:0; }
  .intro-text strong{ color:var(--text); }
  .stat-panel{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-xl);
    padding:8px 24px;
  }
  .stat-item{
    padding:20px 0;
    border-bottom:1px solid var(--line-soft);
  }
  .stat-item:last-child{ border-bottom:0; }
  .stat-label{
    font-size:12.5px;
    letter-spacing:.08em;
    color:var(--faint);
    margin-bottom:6px;
  }
  .stat-value{
    font-size:26px;
    font-weight:800;
    letter-spacing:-.02em;
    font-variant-numeric:tabular-nums;
    display:flex;
    align-items:baseline;
    gap:8px;
  }
  .stat-value small{ font-size:13px; font-weight:500; color:var(--muted); }

  /* ---------- 主体两栏 ---------- */
  .list-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 320px;
    gap:56px;
    align-items:start;
  }

  .rank-list{ border-top:1px solid var(--line); }
  .rank-item{
    display:grid;
    grid-template-columns:88px minmax(0,1fr) auto;
    gap:22px;
    align-items:center;
    padding:26px 16px 26px 8px;
    border-bottom:1px solid var(--line);
    border-radius:12px;
    transition:background-color .2s var(--ease), transform .2s var(--ease);
  }
  .rank-item:hover{
    background:rgba(27,30,36,.72);
    transform:translateX(2px);
  }
  .rank-num{
    font-size:44px;
    line-height:1;
    font-weight:800;
    color:transparent;
    -webkit-text-stroke:1px #3B4149;
    font-variant-numeric:tabular-nums;
    text-align:center;
  }
  .rank-item:hover .rank-num{ -webkit-text-stroke:1px var(--brand); }
  .rank-body h3{
    margin:0 0 6px;
    font-size:20px;
    font-weight:700;
    letter-spacing:-.01em;
  }
  .rank-body p{
    margin:0;
    color:var(--muted);
    font-size:14.5px;
    line-height:1.7;
    max-width:620px;
  }
  .rank-tags{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-bottom:10px;
  }
  .rank-side{
    display:flex;
    flex-direction:column;
    align-items:flex-end;
    gap:10px;
    flex:none;
  }
  .rank-meta{
    font-size:12.5px;
    color:var(--faint);
    font-variant-numeric:tabular-nums;
  }

  /* ---------- 侧栏 ---------- */
  .side-sticky{
    position:sticky;
    top:96px;
    display:flex;
    flex-direction:column;
    gap:20px;
  }
  .side-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:22px;
  }
  .side-title{
    margin:0 0 14px;
    font-size:15px;
    font-weight:700;
    letter-spacing:.01em;
    display:flex;
    align-items:center;
    gap:8px;
  }
  .side-title::before{
    content:"";
    width:3px;
    height:14px;
    border-radius:2px;
    background:var(--brand);
  }
  .toc{
    list-style:none;
    margin:0;
    padding:0;
    display:flex;
    flex-direction:column;
    gap:2px;
  }
  .toc a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    padding:9px 10px;
    border-radius:10px;
    font-size:14px;
    color:var(--muted);
    transition:color .2s var(--ease), background-color .2s var(--ease);
  }
  .toc a span.num{
    font-size:12px;
    color:var(--faint);
    font-variant-numeric:tabular-nums;
  }
  .toc a:hover{ color:var(--text); background:var(--raise); }
  .toc a.is-current{ color:var(--brand); background:var(--brand-soft); }

  .side-list{
    list-style:none;
    margin:0;
    padding:0;
    display:flex;
    flex-direction:column;
    gap:12px;
  }
  .side-list li{
    display:flex;
    gap:10px;
    font-size:14px;
    color:var(--muted);
    line-height:1.65;
  }
  .side-list li::before{
    content:"";
    flex:none;
    width:6px;
    height:6px;
    margin-top:9px;
    border-radius:2px;
    background:var(--cyan);
  }

  .live-row{
    display:flex;
    align-items:center;
    gap:9px;
    padding:12px 14px;
    border:1px solid var(--line);
    border-radius:12px;
    background:rgba(43,227,198,.06);
    font-size:13.5px;
    color:var(--text);
  }
  .live-dot{
    width:8px;
    height:8px;
    border-radius:50%;
    background:var(--cyan);
    flex:none;
    animation:pulse 2s infinite;
  }
  @keyframes pulse{
    0%{ box-shadow:0 0 0 0 rgba(43,227,198,.55); }
    70%{ box-shadow:0 0 0 9px rgba(43,227,198,0); }
    100%{ box-shadow:0 0 0 0 rgba(43,227,198,0); }
  }
  .live-row b{ font-variant-numeric:tabular-nums; color:var(--cyan); }

  .side-cover{
    border-radius:var(--r-lg);
    overflow:hidden;
    border:1px solid var(--line);
    aspect-ratio:4/3;
    background:var(--raise);
  }
  .side-cover img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .4s var(--ease);
  }
  .side-cover:hover img{ transform:scale(1.03); }
  .side-cover-cap{
    margin:10px 0 0;
    font-size:12.5px;
    color:var(--faint);
    line-height:1.6;
  }

  /* ---------- 反相暖米板块 ---------- */
  .warm-panel{
    background:var(--warm);
    color:var(--ink);
    border-radius:24px;
    padding:56px;
  }
  .warm-panel .section-index{ color:#C2450F; }
  .warm-panel .section-title{ color:var(--ink); }
  .warm-panel .section-desc{ color:var(--ink-2); }
  .step-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:24px;
    margin-top:40px;
  }
  .step-card{
    background:#FFFFFF;
    border:1px solid rgba(22,23,26,.08);
    border-radius:var(--r-lg);
    padding:26px 24px;
    box-shadow:0 2px 8px rgba(20,20,20,.06);
    transition:transform .2s var(--ease), box-shadow .2s var(--ease);
  }
  .step-card:hover{ transform:translateY(-2px); box-shadow:0 12px 28px rgba(20,20,20,.10); }
  .step-num{
    font-size:13px;
    font-weight:800;
    letter-spacing:.12em;
    color:#C2450F;
    margin-bottom:14px;
    display:block;
  }
  .step-card h3{
    margin:0 0 10px;
    font-size:18px;
    font-weight:700;
    color:var(--ink);
  }
  .step-card p{
    margin:0;
    font-size:14.5px;
    line-height:1.75;
    color:var(--ink-2);
  }

  /* ---------- FAQ ---------- */
  .faq-wrap{ max-width:820px; }
  .faq-item{
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:var(--surface);
    margin-bottom:12px;
    overflow:hidden;
    transition:border-color .2s var(--ease);
  }
  .faq-item[open]{ border-color:#3A4049; }
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    padding:18px 22px;
    min-height:56px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    font-size:16px;
    font-weight:600;
    transition:color .2s var(--ease);
  }
  .faq-item summary::-webkit-details-marker{ display:none; }
  .faq-item summary:hover{ color:var(--brand); }
  .faq-icon{
    flex:none;
    width:22px;
    height:22px;
    position:relative;
    transition:transform .25s var(--ease);
  }
  .faq-icon::before,
  .faq-icon::after{
    content:"";
    position:absolute;
    left:50%;
    top:50%;
    background:var(--brand);
    border-radius:2px;
  }
  .faq-icon::before{ width:14px; height:2px; transform:translate(-50%,-50%); }
  .faq-icon::after{ width:2px; height:14px; transform:translate(-50%,-50%); }
  .faq-item[open] .faq-icon{ transform:rotate(45deg); }
  .faq-answer{
    padding:0 22px 22px;
    color:var(--muted);
    font-size:15px;
    line-height:1.8;
    max-width:720px;
  }

  /* ---------- CTA ---------- */
  .cta-band{
    background:var(--brand);
    border-radius:24px;
    padding:52px 56px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
    flex-wrap:wrap;
  }
  .cta-band h2{
    margin:0 0 10px;
    font-size:30px;
    font-weight:800;
    letter-spacing:-.02em;
    color:#180B04;
  }
  .cta-band p{
    margin:0;
    color:rgba(24,11,4,.78);
    font-size:15.5px;
    max-width:560px;
  }
  .cta-actions{ display:flex; gap:14px; flex-wrap:wrap; }
  .cta-band .btn-dark{ background:#180B04; color:#FFF3EC; }
  .cta-band .btn-dark:hover{ background:#000; }
  .cta-band .btn-line{
    background:transparent;
    border-color:rgba(24,11,4,.35);
    color:#180B04;
  }
  .cta-band .btn-line:hover{ border-color:#180B04; background:rgba(24,11,4,.08); }

  /* ---------- 页脚 ---------- */
  .site-footer{
    border-top:1px solid var(--line);
    background:#0C0E11;
    margin-top:96px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1.4fr;
    gap:44px;
    padding:64px 24px 48px;
  }
  .footer-brand .brand{ margin-bottom:16px; }
  .footer-brand p{
    margin:0 0 14px;
    color:var(--muted);
    font-size:14px;
    line-height:1.75;
    max-width:300px;
  }
  .footer-domain{
    display:inline-block;
    font-size:12.5px;
    color:var(--faint);
    letter-spacing:.04em;
    padding:4px 10px;
    border:1px solid var(--line);
    border-radius:8px;
  }
  .footer-col h4{
    margin:0 0 16px;
    font-size:14px;
    font-weight:700;
    letter-spacing:.02em;
    color:var(--text);
  }
  .footer-col ul{
    list-style:none;
    margin:0;
    padding:0;
    display:flex;
    flex-direction:column;
    gap:10px;
  }
  .footer-col a{
    font-size:14px;
    color:var(--muted);
    transition:color .2s var(--ease);
  }
  .footer-col a:hover{ color:var(--brand); }

  .sub-form label{
    display:block;
    font-size:13.5px;
    color:var(--muted);
    margin-bottom:12px;
    line-height:1.65;
  }
  .sub-row{ display:flex; gap:10px; }
  .sub-row input{
    flex:1;
    min-width:0;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:12px;
    padding:11px 14px;
    color:var(--text);
    font-size:14px;
    font-family:inherit;
    transition:border-color .2s var(--ease);
  }
  .sub-row input::placeholder{ color:var(--faint); }
  .sub-row input:focus{
    outline:none;
    border-color:var(--brand);
  }
  .sub-note{
    margin:10px 0 0;
    font-size:12.5px;
    color:var(--faint);
  }
  .sub-note.is-ok{ color:var(--cyan); }
  .sub-note.is-err{ color:var(--brand); }

  .footer-bottom{
    border-top:1px solid var(--line);
  }
  .footer-bottom-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding-top:22px;
    padding-bottom:22px;
    font-size:13px;
    color:var(--faint);
    flex-wrap:wrap;
  }

  /* ---------- 移动抽屉 ---------- */
  .drawer{
    position:fixed;
    inset:0;
    z-index:100;
    background:var(--bg);
    display:flex;
    flex-direction:column;
    padding:20px 20px 32px;
    transform:translateX(102%);
    transition:transform .3s var(--ease);
    visibility:hidden;
  }
  .drawer.is-open{ transform:translateX(0); visibility:visible; }
  .drawer-head{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding-bottom:18px;
    border-bottom:1px solid var(--line);
  }
  .drawer-close{
    width:40px;
    height:40px;
    border:1px solid var(--line);
    border-radius:12px;
    background:transparent;
    color:var(--text);
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:center;
    transition:border-color .2s var(--ease);
  }
  .drawer-close:hover{ border-color:var(--brand); color:var(--brand); }
  .drawer-nav{
    display:flex;
    flex-direction:column;
    padding:18px 0;
    gap:2px;
  }
  .drawer-nav a{
    padding:16px 6px;
    font-size:19px;
    font-weight:600;
    color:var(--muted);
    border-bottom:1px solid var(--line-soft);
    transition:color .2s var(--ease), padding-left .2s var(--ease);
  }
  .drawer-nav a:hover{ color:var(--text); padding-left:12px; }
  .drawer-nav a.is-active{ color:var(--brand); }
  .drawer-foot{ margin-top:auto; display:flex; flex-direction:column; gap:16px; }
  .drawer-foot .drawer-domain{ font-size:13px; color:var(--faint); letter-spacing:.04em; }

  /* ---------- 吸底 CTA ---------- */
  .mobile-cta{
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    z-index:70;
    display:none;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    height:64px;
    padding:0 16px;
    background:#0F1115;
    border-top:1px solid var(--line);
  }
  .mobile-cta span{
    font-size:13px;
    color:var(--muted);
    line-height:1.4;
  }

  /* ---------- 入场动画 ---------- */
  .reveal{
    opacity:0;
    transform:translateY(12px);
    transition:opacity .4s var(--ease), transform .4s var(--ease);
  }
  .reveal.is-in{ opacity:1; transform:none; }

  /* ---------- 响应式 ---------- */
  @media (max-width:1024px){
    .container{ padding-left:20px; padding-right:20px; }
    .section{ padding:72px 0; }
    .section-tight{ padding:56px 0; }
    .page-title{ font-size:34px; }
    .section-title{ font-size:26px; }
    .intro-grid{ grid-template-columns:1fr; gap:32px; }
    .list-layout{ grid-template-columns:1fr; gap:36px; }
    .side-sticky{ position:static; }
    .footer-grid{ grid-template-columns:1fr 1fr; gap:36px; padding:48px 20px 36px; }
    .warm-panel{ padding:40px 32px; }
    .step-grid{ grid-template-columns:1fr; }
    .cta-band{ padding:40px 32px; }
  }

  @media (max-width:860px){
    .main-nav{ display:none; }
    .menu-toggle{ display:inline-flex; }
    .header-right .btn{ display:none; }
    .mobile-cta{ display:flex; }
    body{ padding-bottom:72px; }
    .topbar-tip{ display:none; }
    .topbar-inner{ justify-content:space-between; }
    .site-footer{ margin-top:72px; }
  }

  @media (max-width:640px){
    .container{ padding-left:16px; padding-right:16px; }
    .section{ padding:56px 0; }
    .page-hero{ min-height:280px; }
    .page-hero-inner{ padding-top:36px; padding-bottom:32px; }
    .page-title{ font-size:27px; }
    .page-sub{ font-size:15px; }
    .section-title{ font-size:24px; }
    .rank-item{
      grid-template-columns:56px minmax(0,1fr);
      gap:14px;
      padding:20px 8px;
    }
    .rank-num{ font-size:32px; }
    .rank-side{
      grid-column:2 / 3;
      align-items:flex-start;
      flex-direction:row;
      justify-content:space-between;
      width:100%;
    }
    .rank-body h3{ font-size:18px; }
    .warm-panel{ padding:30px 20px; border-radius:20px; }
    .cta-band{ padding:32px 22px; border-radius:20px; }
    .cta-band h2{ font-size:24px; }
    .footer-grid{ grid-template-columns:1fr; gap:30px; padding:40px 16px 30px; }
    .sub-row{ flex-direction:column; }
    .sub-row .btn{ width:100%; }
    .stat-panel{ padding:4px 18px; }
    .faq-item summary{ font-size:15px; padding:16px 18px; }
    .faq-answer{ padding:0 18px 18px; font-size:14.5px; }
  }

  @media (max-width:420px){
    .topbar-domain span{ font-size:12px; }
    .brand{ font-size:16px; }
    .page-title{ font-size:24px; }
  }

  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior:auto; }
    *,*::before,*::after{
      animation-duration:.001ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.001ms !important;
    }
    .reveal{ opacity:1; transform:none; }
  }

/* roulang page: category3 */
:root{
  --bg:#0A0B0D;
  --surface:#131519;
  --surface-2:#1B1E24;
  --line:#262A31;
  --line-strong:#3A4049;
  --text:#F2F4F7;
  --muted:#A6AEBB;
  --dim:#6B7280;
  --brand:#FF5A1F;
  --brand-hi:#FF6F3A;
  --brand-soft:rgba(255,90,31,.12);
  --cyan:#2BE3C6;
  --cyan-soft:rgba(43,227,198,.12);
  --lemon:#F5E14C;
  --paper:#F4F1EC;
  --paper-text:#16171A;
  --paper-muted:#5B554D;
  --paper-line:#E3DDD3;
  --radius-sm:12px;
  --radius:16px;
  --radius-lg:20px;
  --shadow-hover:0 12px 40px rgba(0,0,0,.45);
  --shadow-paper:0 2px 8px rgba(20,20,20,.06);
  --ease:cubic-bezier(.2,.8,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* 顶部信息条 */
.topbar{background:#0F1115;border-bottom:1px solid var(--line);font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:40px}
.topbar-domain{display:inline-flex;align-items:center;gap:7px;color:var(--muted);letter-spacing:.02em;white-space:nowrap}
.topbar-domain svg{width:13px;height:13px;color:var(--cyan)}
.topbar-note{color:var(--dim);letter-spacing:.02em;white-space:nowrap}
.topbar-actions{display:flex;align-items:center;gap:18px;white-space:nowrap}
.topbar-actions a{color:var(--muted);transition:color .2s var(--ease)}
.topbar-actions a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.topbar-actions a.topbar-cta{color:var(--brand);font-weight:600}

/* 主导航 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(10,11,13,.95);border-bottom:1px solid var(--line);transition:background .2s var(--ease)}
.site-header.is-scrolled{background:#0A0B0D;border-bottom-color:var(--line-strong)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em;color:var(--text)}
.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--brand);color:#0A0B0D;display:grid;place-items:center;flex:none}
.brand-mark svg{width:15px;height:15px}
.main-nav{display:flex;align-items:center;gap:30px}
.nav-link{position:relative;font-size:15px;color:var(--muted);padding:6px 2px;transition:color .2s var(--ease)}
.nav-link:hover{color:var(--text)}
.nav-link.is-active{color:var(--text);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:0;bottom:-2px;width:20px;height:2px;border-radius:2px;background:var(--brand)}
.nav-right{display:flex;align-items:center;gap:12px}
.menu-btn{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--text);align-items:center;justify-content:center;cursor:pointer;transition:border-color .2s var(--ease)}
.menu-btn:hover{border-color:var(--brand)}
.menu-btn svg{width:20px;height:20px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:14px 28px;font-size:15px;font-weight:600;letter-spacing:.02em;border:1px solid transparent;cursor:pointer;transition:background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#0A0B0D}
.btn-primary:hover{background:var(--brand-hi);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-dark{background:#16171A;color:#F4F1EC}
.btn-dark:hover{background:#232529;transform:translateY(-1px)}
.btn-outline-dark{background:transparent;border-color:rgba(22,23,26,.28);color:#16171A}
.btn-outline-dark:hover{border-color:#16171A;transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:13px}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:14px;background:none;border:0;padding:0;cursor:pointer}
.btn-link .arrow{transition:transform .2s var(--ease)}
.btn-link:hover .arrow{transform:translateX(4px)}
.btn-link:hover{text-decoration:underline;text-underline-offset:4px}

/* 徽章 */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:6px;font-size:11px;font-weight:500;letter-spacing:.08em;line-height:1.6}
.badge-brand{background:var(--brand-soft);color:#FF9163}
.badge-cyan{background:var(--cyan-soft);color:var(--cyan)}
.badge-lemon{background:rgba(245,225,76,.14);color:var(--lemon)}
.badge-line{border:1px solid var(--line);color:var(--muted)}

/* 版块 */
.section{padding:96px 0;border-top:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px}
.sec-num{display:block;font-size:12px;font-weight:600;letter-spacing:.24em;color:var(--brand);margin-bottom:12px}
.h1-title{font-size:44px;line-height:1.25;font-weight:800;letter-spacing:-.02em}
.h2{font-size:32px;line-height:1.3;font-weight:800;letter-spacing:-.02em}
.h3{font-size:20px;line-height:1.45;font-weight:700;letter-spacing:-.01em}
.sec-sub{max-width:420px;color:var(--muted);font-size:15px}
.lead-sm{color:var(--muted);font-size:16px;margin-top:16px;max-width:420px}

/* 面包屑与页头 */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--dim);margin-bottom:18px}
.breadcrumb a{color:var(--muted);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span.sep{color:var(--line-strong)}
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:56px 0 48px}
.page-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3}
.page-hero-veil{position:absolute;inset:0;background:linear-gradient(to top,#0A0B0D 8%,rgba(10,11,13,.78) 55%,rgba(10,11,13,.6) 100%)}
.page-hero-inner{position:relative;z-index:2}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:6px;background:var(--brand-soft);color:#FF9163;font-size:12px;letter-spacing:.12em;font-weight:600;margin-bottom:20px}
.hero-lead{max-width:720px;color:var(--muted);font-size:17px;margin-top:20px}
.trust-bar{display:flex;flex-wrap:wrap;gap:14px 34px;margin-top:32px;padding-top:22px;border-top:1px solid var(--line)}
.trust-item{display:flex;flex-direction:column;gap:2px}
.trust-num{font-size:22px;font-weight:800;letter-spacing:-.01em}
.trust-num em{font-style:normal;color:var(--cyan)}
.trust-label{font-size:13px;color:var(--dim)}

/* 分栏 */
.split-2{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:64px;align-items:start}
.split-side{position:sticky;top:104px}

/* 清单 */
.tick-list{border-top:1px solid var(--line)}
.tick-item{display:grid;grid-template-columns:72px minmax(0,1fr) 168px;gap:24px;align-items:start;padding:26px 0;border-bottom:1px solid var(--line);transition:background-color .2s var(--ease)}
.tick-item:hover{background:rgba(255,255,255,.02)}
.tick-item:hover .tick-index{-webkit-text-stroke-color:var(--brand)}
.tick-index{font-size:34px;font-weight:800;line-height:1.1;color:transparent;-webkit-text-stroke:1px var(--line-strong);transition:-webkit-text-stroke-color .2s var(--ease)}
.tick-body p{color:var(--muted);font-size:15px;margin-top:8px}
.tick-meta{font-size:13px;color:var(--dim);text-align:right;line-height:1.9}

/* 反相暖米区 */
.paper{background:var(--paper);color:var(--paper-text);border-top:1px solid var(--paper-line)}
.paper .h2,.paper .h3{color:var(--paper-text)}
.paper .sec-num{color:#B23A0C}
.paper .sec-sub,.paper .lead-sm{color:var(--paper-muted)}
.step-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step-card{background:#FFFFFF;border:1px solid var(--paper-line);border-radius:var(--radius);padding:24px 20px;box-shadow:var(--shadow-paper);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.step-card:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(20,20,20,.1)}
.step-num{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.16em;color:#B23A0C;margin-bottom:14px}
.step-card .h3{font-size:18px;margin-bottom:8px}
.step-card p{color:var(--paper-muted);font-size:14px;line-height:1.7}
.paper-note{margin-top:28px;padding:18px 20px;border-left:3px solid var(--brand);background:rgba(255,90,31,.06);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--paper-muted);font-size:14px}

/* 卡片 */
.card-grid{display:grid;gap:22px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}
.card:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--shadow-hover)}
.card:hover .media img{transform:scale(1.03)}
.media{position:relative;overflow:hidden;background:var(--surface-2)}
.media-16-9{aspect-ratio:16 / 9}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.media-tag{position:absolute;top:12px;left:12px}
.media-time{position:absolute;right:12px;bottom:12px;padding:3px 8px;border-radius:6px;background:rgba(10,11,13,.72);color:var(--cyan);font-size:11px;letter-spacing:.06em}
.card-body{padding:18px 18px 20px}
.card-text{color:var(--muted);font-size:14px;line-height:1.7;margin-top:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
.meta{font-size:12px;color:var(--dim);letter-spacing:.04em}

/* 图文对开 */
.duo{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
.duo-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);aspect-ratio:4 / 3}
.duo-media img{width:100%;height:100%;object-fit:cover}
.dot-list{margin-top:24px;border-top:1px solid var(--line)}
.dot-list li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--muted)}
.dot-list li strong{color:var(--text);font-weight:600}
.dot-mark{flex:none;width:6px;height:6px;margin-top:11px;border-radius:2px;background:var(--brand)}

/* FAQ */
.faq-wrap{max-width:840px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 0;background:none;border:0;color:var(--text);text-align:left;font-size:17px;font-weight:600;cursor:pointer;transition:color .2s var(--ease)}
.faq-q:hover{color:var(--brand)}
.faq-icon{flex:none;width:22px;height:22px;display:grid;place-items:center;color:var(--brand);transition:transform .2s var(--ease)}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a-inner{max-width:720px;padding:0 0 22px;color:var(--muted);font-size:15px}

/* CTA 通栏 */
.cta-band{background:var(--brand);color:#0A0B0D;padding:64px 0;border-top:1px solid var(--line)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-title{color:#0A0B0D;margin-top:12px}
.cta-text{color:rgba(10,11,13,.72);margin-top:10px;font-size:16px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.badge-onbrand{background:rgba(10,11,13,.14);color:#0A0B0D}

/* 页脚 */
.site-footer{border-top:1px solid var(--line);background:#0C0D10}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.5fr;gap:40px;padding:72px 24px 48px}
.footer-brand p{color:var(--muted);font-size:14px;margin-top:14px;max-width:300px}
.footer-domain{display:inline-block;margin-top:14px;font-size:13px;color:var(--dim);letter-spacing:.04em}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:var(--muted);transition:color .2s var(--ease)}
.footer-col ul li a:hover{color:var(--brand)}
.sub-form label{display:block;font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:12px}
.sub-row{display:flex;gap:8px}
.sub-row input{flex:1;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 14px;color:var(--text);font-size:14px;transition:border-color .2s var(--ease)}
.sub-row input::placeholder{color:var(--dim)}
.sub-row input:focus{border-color:var(--brand);outline:none}
.sub-note{font-size:12px;color:var(--dim);margin-top:10px}
.sub-note.is-error{color:var(--brand)}
.footer-bottom{border-top:1px solid var(--line)}
.footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:20px 24px;font-size:13px;color:var(--dim)}

/* 移动抽屉 */
.drawer{position:fixed;inset:0;z-index:80;background:var(--bg);padding:24px;overflow-y:auto;transform:translateX(100%);transition:transform .3s var(--ease);display:flex;flex-direction:column;gap:8px}
.drawer.is-open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--text);display:grid;place-items:center;cursor:pointer}
.drawer-close:hover{border-color:var(--brand)}
.drawer-link{display:block;padding:16px 4px;font-size:19px;font-weight:600;border-bottom:1px solid var(--line);color:var(--muted)}
.drawer-link.is-active{color:var(--brand)}
.drawer-foot{margin-top:auto;padding-top:28px}
.drawer-foot .footer-domain{display:block;margin-top:16px}

/* 吸底 CTA */
.mobile-cta{position:fixed;left:0;right:0;bottom:0;z-index:60;display:none;align-items:center;justify-content:space-between;gap:14px;padding:10px 16px;background:#0F1115;border-top:1px solid var(--line)}
.mobile-cta span{font-size:13px;color:var(--muted)}

/* 入场动效 */
.reveal-init{opacity:0;transform:translateY(12px)}
.reveal-in{opacity:1;transform:none;transition:opacity .4s var(--ease),transform .4s var(--ease)}

/* 响应式 */
@media (max-width:1024px){
  .section{padding:72px 0}
  .split-2{grid-template-columns:1fr;gap:36px}
  .split-side{position:static}
  .duo{grid-template-columns:1fr;gap:32px}
  .step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:56px 24px 38px}
  .h1-title{font-size:36px}
  .h2{font-size:27px}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .main-nav{display:none}
  .menu-btn{display:flex}
  .topbar-note{display:none}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px}
  .h1-title{font-size:30px}
  .h2{font-size:24px}
  .h3{font-size:18px}
  .hero-lead{font-size:15.5px}
  .page-hero{padding:40px 0 34px}
  .tick-item{grid-template-columns:auto minmax(0,1fr);gap:16px}
  .tick-index{font-size:26px}
  .tick-meta{grid-column:2;text-align:left}
  .step-grid{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .mobile-cta{display:flex}
  body{padding-bottom:76px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;padding:48px 16px 32px}
  .footer-bottom-inner{padding:18px 16px}
  .topbar-inner{height:38px;gap:10px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .sub-row{flex-direction:column;align-items:stretch}
  .sub-row .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal-init{opacity:1;transform:none}
  .reveal-in{transition:none}
  *{transition:none !important;animation:none !important}
}