:root{
  --bg:#111722;--surface:#18202D;--surface2:#1E2736;--surface3:#253044;
  --gold:#F0D89A;--gold2:#E4C77D;--text:#E8EDF6;--muted:#BAC3D2;--subtle:#8F9AAF;
  --footer:#0B1018;--line:rgba(240,216,154,.14);--shadow:0 16px 42px rgba(0,0,0,.26);
  --radius:18px;--card:14px;--max:1280px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%}
button{font:inherit}
.site-header{position:sticky;top:0;z-index:9999;width:100%;background:#111722;box-shadow:0 10px 30px rgba(0,0,0,.24)}
.header-inner{max-width:1280px;min-height:72px;margin:0 auto;padding:0 22px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:24px}
.brand-logo,.mobile-logo,.drawer-logo{display:flex;align-items:center;min-width:0}
.brand-logo img,.mobile-logo img,.drawer-logo img,.footer-brand img{height:46px;width:auto;max-width:165px;object-fit:contain}
.logo-fallback{font-size:25px;font-weight:800;color:var(--gold);letter-spacing:2px;white-space:nowrap}
.main-nav{display:flex;align-items:center;justify-content:center;gap:clamp(14px,2vw,30px);min-width:0}
.main-nav a{font-size:15px;font-weight:700;color:var(--muted);white-space:nowrap;transition:.2s}
.main-nav a:hover,.main-nav a.active{color:var(--gold)}
.header-actions{display:flex;gap:10px;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 17px;border-radius:999px;font-weight:800;font-size:14px}
.btn-dark{background:var(--surface2);border:1px solid var(--line)}
.btn-gold{background:var(--gold);color:#111722}
.category-nav{border-top:1px solid rgba(255,255,255,.04);background:#151D29}
.category-inner{max-width:1280px;margin:0 auto;padding:9px 22px;display:flex;gap:18px;overflow-x:auto;scrollbar-width:thin}
.category-inner a{white-space:nowrap;color:var(--muted);font-size:13px}
.category-inner a:hover{color:var(--gold)}
.mobile-header{display:none;height:64px;padding:0 14px;grid-template-columns:74px minmax(0,1fr) 94px;align-items:center}
.menu-button{width:42px;height:42px;border:0;border-radius:12px;background:var(--surface2);display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;padding:0}
.menu-button span{width:20px;height:2px;background:var(--text);display:block}
.mobile-logo{justify-self:center;max-width:150px}
.mobile-logo img{height:40px;max-width:145px}
.mobile-register{justify-self:end;color:#111722;background:var(--gold);border-radius:999px;font-size:13px;font-weight:800;padding:8px 12px;white-space:nowrap}
.drawer-overlay{position:fixed;inset:0;background:rgba(4,8,14,.68);z-index:10000;opacity:0;transition:.2s}
.drawer-overlay.show{opacity:1}
.mobile-drawer{position:fixed;top:0;left:0;width:min(86vw,330px);height:100dvh;background:#18202D;z-index:10001;transform:translateX(-105%);transition:transform .22s ease;box-shadow:20px 0 40px rgba(0,0,0,.35)}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{height:68px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;border:0;border-radius:12px;background:var(--surface3);color:var(--text);font-size:28px;line-height:1}
.drawer-scroll{height:calc(100dvh - 68px);overflow-y:auto;padding:14px 14px 28px}
.drawer-group{display:grid;gap:6px;padding:12px 0;border-bottom:1px solid rgba(240,216,154,.08)}
.drawer-group strong{font-size:13px;color:var(--gold);letter-spacing:.08em;margin:0 8px 4px}
.drawer-group a{padding:8px;border-radius:10px;color:var(--muted);font-size:14px}
.drawer-group a:hover{background:var(--surface2);color:var(--text)}
.site-main{min-height:60vh}
.container{width:min(calc(100% - 44px),var(--max));margin:0 auto}
.reading-width{width:min(calc(100% - 44px),860px);margin:0 auto}
.section{padding:86px 0}
.section.compact{padding:64px 0}
.section.alt{background:var(--surface)}
.eyebrow{color:var(--gold);font-size:13px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
h1,h2,h3{line-height:1.25;margin-top:0}
h1{font-size:clamp(32px,4vw,52px);letter-spacing:-.02em;margin-bottom:22px;color:var(--gold)}
h2{font-size:clamp(26px,3vw,36px);color:var(--gold);margin-bottom:18px}
h3{font-size:20px;color:#f5e5b7;margin-bottom:10px}
p{margin:0 0 16px;color:var(--muted)}
.lead{font-size:clamp(17px,2vw,20px);max-width:820px;color:var(--text)}
.page-hero{padding:78px 0 50px;background:linear-gradient(180deg,#141c29 0%,#111722 100%)}
.hero-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--gold);font-weight:800}
.text-link:hover{color:var(--gold2)}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:16px;background:#111722;border:1px solid rgba(240,216,154,.10)}
.media img{position:absolute;inset:0;width:100%;height:100%;display:block;object-fit:contain;object-position:center center}
.media-placeholder{position:absolute;inset:0;background:radial-gradient(circle at 30% 30%,#253044,#111722 70%)}
.media-poster{aspect-ratio:16/7;min-height:260px;max-height:380px}
.media-topic{aspect-ratio:16/10;min-height:150px;max-height:210px}
.media-main{aspect-ratio:4/3;min-height:220px;max-height:320px}
.media-app{aspect-ratio:4/3;min-height:210px;max-height:300px}
.hero-slider{position:relative}
.hero-slide{display:none}
.hero-slide.active{display:block}
.hero-slide .media{border-radius:0;border-left:0;border-right:0}
.hero-caption{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);width:min(calc(100% - 44px),1180px);background:rgba(11,16,24,.78);backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:var(--shadow)}
.hero-caption h1,.hero-caption h2{font-size:clamp(25px,3.5vw,44px);margin:0 0 8px}
.hero-caption p{max-width:720px;margin:0;font-size:15px;color:var(--text)}
.slider-dots{position:absolute;right:22px;bottom:22px;display:flex;gap:8px;z-index:2}
.slider-dot{width:10px;height:10px;border-radius:50%;border:1px solid var(--gold);background:transparent;padding:0}
.slider-dot.active{background:var(--gold)}
.guide-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:22px}
.guide-side{display:grid;gap:22px}
.panel{background:var(--surface2);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.panel.soft{background:var(--surface)}
.panel.emphasis{background:var(--surface3)}
.timeline{display:grid;grid-template-columns:repeat(6,minmax(140px,1fr));gap:0;overflow-x:auto;padding-bottom:6px}
.timeline-item{padding:18px 20px;border-left:1px solid var(--line);min-width:160px}
.timeline-item:first-child{border-left:0}
.timeline-item strong{display:block;color:var(--gold);margin-bottom:6px}
.split{display:grid;grid-template-columns:45fr 55fr;gap:34px;align-items:center}
.split.reverse{grid-template-columns:55fr 45fr}
.channel-grid{display:grid;grid-template-columns:1.15fr .85fr .85fr;gap:22px;align-items:start}
.channel-grid .wide{grid-row:span 2;min-height:340px}
.stack{display:grid;gap:22px}
.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.topic-card{background:var(--surface2);border:1px solid var(--line);border-radius:var(--card);overflow:hidden}
.topic-card .topic-body{padding:18px}
.topic-card h3{font-size:18px}
.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.feature-list{display:grid;gap:12px;padding:0;margin:22px 0 0;list-style:none}
.feature-list li{position:relative;padding:16px 18px 16px 46px;background:var(--surface2);border:1px solid var(--line);border-radius:14px;color:var(--muted)}
.feature-list li:before{content:"";position:absolute;left:18px;top:24px;width:10px;height:10px;border-radius:50%;background:var(--gold)}
.link-list{display:grid;gap:10px}
.link-list a{padding:12px 0;border-bottom:1px solid rgba(240,216,154,.10);color:var(--text)}
.link-list a:hover{color:var(--gold)}
.feedback-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.feedback{background:var(--surface2);border-left:3px solid var(--gold);border-radius:0 14px 14px 0;padding:22px}
.faq-list{display:grid;gap:14px}
.faq-item{background:var(--surface2);border:1px solid var(--line);border-radius:14px;padding:22px}
.faq-item h3{font-size:18px;margin-bottom:8px}
.notice{padding:22px 24px;border-radius:14px;background:#151d29;border:1px solid var(--line)}
.notice strong{color:var(--gold)}
.callout{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;padding:28px;background:var(--surface3);border:1px solid var(--line);border-radius:18px}
.callout p{margin:0}
.site-footer{background:var(--footer);padding:60px 0 28px}
.footer-grid{width:min(calc(100% - 44px),1280px);margin:0 auto;display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:36px}
.footer-grid h2{font-size:16px;margin-bottom:14px}
.footer-grid a{display:block;color:var(--muted);margin:6px 0;font-size:14px}
.footer-grid a:hover{color:var(--gold)}
.footer-brand p{max-width:360px;font-size:14px}
.footer-legal{width:min(calc(100% - 44px),1280px);margin:32px auto 0;padding-top:24px;border-top:1px solid rgba(240,216,154,.10)}
.footer-legal p{font-size:13px;color:var(--subtle);margin:5px 0}
.footer-legal strong{color:var(--muted)}
.desktop-tools{position:fixed;right:18px;bottom:26px;z-index:8000;display:grid;gap:8px}
.desktop-tools a,.desktop-tools button{border:1px solid var(--line);background:var(--surface2);color:var(--text);border-radius:10px;padding:9px 12px;font-size:12px;text-align:center;box-shadow:0 8px 20px rgba(0,0,0,.2);cursor:pointer}
.desktop-tools .tool-gold{background:var(--gold);color:#111722;font-weight:800}
.mobile-bottom{display:none}
.meta-row{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0 0}
.meta-chip{padding:6px 10px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:13px}
.content-columns{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.9fr);gap:30px;align-items:start}
.narrow-list{display:grid;gap:18px}
.narrow-list article{padding-bottom:18px;border-bottom:1px solid var(--line)}
.article-body p{font-size:17px;line-height:1.86}
.article-body h2{margin-top:42px}
.article-body h3{margin-top:28px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1100px){
  .header-inner{gap:15px;padding:0 16px}
  .main-nav{gap:13px}.main-nav a{font-size:14px}
  .header-actions{gap:7px}.btn{padding:0 13px}
  .topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .channel-grid{grid-template-columns:1fr 1fr}.channel-grid .wide{grid-column:1/-1;grid-row:auto;min-height:auto}
}
@media(max-width:900px){
  .desktop-header{display:none}.mobile-header{display:grid}
  .site-header{height:64px}
  .section{padding:64px 0}.section.compact{padding:48px 0}
  .page-hero{padding:54px 0 36px}
  .container,.reading-width{width:min(calc(100% - 32px),var(--max))}
  .guide-grid,.split,.split.reverse,.content-columns{grid-template-columns:1fr}
  .split .media{order:-1}.split.reverse .media{order:0}
  .three-col{grid-template-columns:1fr 1fr}
  .topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
  .footer-grid>div:last-child{grid-column:2/-1}
  .desktop-tools{display:none}
  .hero-caption{bottom:18px}
  .media-poster{aspect-ratio:16/8;min-height:220px;max-height:320px}
}
@media(max-width:720px){
  body{padding-bottom:62px}
  .section{padding:54px 0}
  .media-poster{aspect-ratio:16/10;min-height:190px;max-height:280px}
  .hero-caption{position:relative;left:auto;bottom:auto;transform:none;width:auto;margin:-1px 16px 0;border-radius:0 0 16px 16px;background:var(--surface2)}
  .hero-caption h1,.hero-caption h2{font-size:30px}
  .slider-dots{right:24px;bottom:auto;top:18px}
  .timeline{grid-template-columns:repeat(6,150px)}
  .channel-grid,.two-col,.three-col{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  .topic-card .topic-body{padding:14px}
  .feedback-list{grid-template-columns:1fr}
  .callout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-grid>div:first-child{grid-column:1/-1}
  .footer-grid>div:last-child{grid-column:auto}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9000;height:62px;display:grid;grid-template-columns:repeat(5,1fr);background:#0B1018;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
  .mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--muted)}
  .mobile-bottom a:hover{color:var(--gold)}
}
@media(max-width:460px){
  .mobile-header{grid-template-columns:62px minmax(0,1fr) 88px;padding:0 10px}
  .menu-button{width:40px;height:40px}
  .mobile-logo img{max-width:132px;height:38px}
  .mobile-register{padding:7px 10px;font-size:12px}
  .container,.reading-width{width:min(calc(100% - 24px),var(--max))}
  h1{font-size:32px}
  .panel{padding:22px}
  .topic-grid{gap:12px}
  .topic-card h3{font-size:16px}
  .topic-card p{font-size:13px}
  .footer-grid{grid-template-columns:1fr}
  .footer-grid>div:first-child,.footer-grid>div:last-child{grid-column:auto}
}