:root{
  --bg-0:#07090f; --bg-1:#0b0f18; --bg-2:#10151f; --bg-3:#161c2a;
  --line:rgba(212,175,55,.16); --line-soft:rgba(255,255,255,.07);
  --gold:#d4af37; --gold-2:#f0c75e; --gold-dim:#a8893c;
  --red:#c13b2f; --red-2:#e0644f;
  --ink:#eae7df; --ink-dim:#a7aebd; --ink-faint:#79839a;
  --font-d:'Noto Serif SC','Songti SC','SimSun',serif;
  --font-b:'Noto Sans SC','Microsoft YaHei','PingFang SC',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg-0);color:var(--ink);font-family:var(--font-b);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{width:min(1200px,92%);margin:0 auto}
::selection{background:rgba(212,175,55,.3);color:#fff}

.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;transition:background .35s,box-shadow .35s;border-bottom:1px solid transparent}
.navbar.scrolled{background:rgba(8,11,18,.92);backdrop-filter:blur(12px);border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(0,0,0,.45)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-d);font-weight:700;font-size:20px;letter-spacing:1px;color:var(--ink)}
.logo .mark{width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,#d4af37,#8a6d26);display:flex;align-items:center;justify-content:center;color:#0b0f18;box-shadow:0 0 18px rgba(212,175,55,.35)}
.logo b{color:var(--gold-2)}
.nav-menu{display:flex;align-items:center;gap:6px;height:100%}
.nav-menu a{position:relative;padding:0 16px;height:100%;display:flex;align-items:center;font-size:15px;color:var(--ink-dim);transition:color .25s}
.nav-menu a::after{content:'';position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:0;height:2px;background:linear-gradient(90deg,transparent,var(--gold),transparent);transition:width .3s}
.nav-menu a:hover,.nav-menu a.active{color:var(--gold-2)}
.nav-menu a.active::after,.nav-menu a:hover::after{width:70%}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--gold-2);font-size:20px;cursor:pointer;align-items:center;justify-content:center}

.hero{position:relative;min-height:88vh;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#07090f}
.hero .bg{position:absolute;inset:0}
.hero .bg img{width:100%;height:100%;object-fit:cover;object-position:center;filter:brightness(.78)}
.hero .bg::after{content:'';position:absolute;inset:0;background:
  radial-gradient(ellipse at 50% 30%,transparent 0%,rgba(7,9,15,.35) 60%,rgba(7,9,15,.92) 100%),
  linear-gradient(180deg,rgba(7,9,15,.25) 0%,transparent 30%,transparent 55%,var(--bg-0) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;padding:120px 20px 60px;max-width:960px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:4px;color:var(--gold-2);text-transform:uppercase;border:1px solid var(--line);padding:7px 18px;border-radius:40px;background:rgba(212,175,55,.06);margin-bottom:26px}
.hero-eyebrow::before,.hero-eyebrow::after{content:'';width:26px;height:1px;background:linear-gradient(90deg,transparent,var(--gold))}
.hero-eyebrow::after{background:linear-gradient(90deg,var(--gold),transparent)}
.hero h1{font-family:var(--font-d);font-weight:900;font-size:clamp(34px,6vw,64px);line-height:1.18;color:#fff;letter-spacing:2px;text-shadow:0 4px 30px rgba(0,0,0,.6)}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,#f6d98a,var(--gold),#d4af37 60%,#f0c75e);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sign{font-family:var(--font-d);font-weight:700;font-size:clamp(22px,3.6vw,36px);margin:16px 0 8px;color:var(--gold-2);letter-spacing:6px}
.hero-sign .dot{color:var(--red-2)}
.hero-sub{max-width:680px;margin:0 auto;color:var(--ink-dim);font-size:16px;font-weight:300;line-height:1.9}
.hero-cta{display:flex;gap:16px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:40px;font-size:15px;font-weight:500;cursor:pointer;transition:transform .25s,box-shadow .25s,background .25s;border:1px solid transparent}
.btn svg{width:16px;height:16px}
.btn-gold{background:linear-gradient(120deg,var(--gold-2),var(--gold) 55%,var(--gold-dim));color:#13100a;box-shadow:0 8px 26px rgba(212,175,55,.3)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(212,175,55,.45)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:rgba(255,255,255,.03)}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--gold);color:var(--gold-2)}
.hero-scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;color:var(--ink-faint);font-size:12px;letter-spacing:3px;display:flex;flex-direction:column;align-items:center;gap:6px}
.hero-scroll span{display:block;width:1px;height:38px;background:linear-gradient(180deg,var(--gold),transparent);animation:drop 2s ease-in-out infinite}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}55%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

.section{padding:96px 0;position:relative}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-eyebrow{font-size:13px;letter-spacing:5px;color:var(--gold);font-weight:600;margin-bottom:14px}
.section-eyebrow::before,.section-eyebrow::after{content:'—';color:var(--gold-dim);margin:0 8px}
.section-head h2{font-family:var(--font-d);font-weight:700;font-size:clamp(28px,3.6vw,42px);color:#fff;letter-spacing:2px}
.section-head p{color:var(--ink-dim);font-size:15px;margin-top:14px;font-weight:300}

.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

.learning{background:var(--bg-1)}
.learning-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.learn-card{background:linear-gradient(180deg,var(--bg-3),var(--bg-2));border:1px solid var(--line-soft);border-radius:16px;padding:34px 26px;position:relative;overflow:hidden;transition:transform .35s,border-color .35s}
.learn-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:0;transition:opacity .3s}
.learn-card:hover{transform:translateY(-8px);border-color:var(--line)}
.learn-card:hover::before{opacity:1}
.learn-card .num{position:absolute;top:16px;right:22px;font-family:var(--font-d);font-size:44px;font-weight:700;color:rgba(212,175,55,.12)}
.learn-icon{width:58px;height:58px;border-radius:14px;background:linear-gradient(135deg,rgba(212,175,55,.16),rgba(193,59,47,.12));border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--gold-2);margin-bottom:22px}
.learn-icon svg{width:26px;height:26px}
.learn-card h3{font-size:19px;color:#fff;font-weight:600;margin-bottom:10px}
.learn-card p{font-size:14px;color:var(--ink-dim);font-weight:300}

.server{background:
  radial-gradient(1100px 500px at 80% -10%,rgba(212,175,55,.06),transparent 60%),
  radial-gradient(900px 460px at 10% 110%,rgba(193,59,47,.07),transparent 60%),
  var(--bg-0)}
.server-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.server-card{background:var(--bg-2);border:1px solid var(--line-soft);border-radius:16px;overflow:hidden;transition:transform .35s,border-color .35s,box-shadow .35s}
.server-card:hover{transform:translateY(-6px);border-color:var(--line);box-shadow:0 18px 40px rgba(0,0,0,.4)}
.server-head{background:linear-gradient(120deg,var(--bg-3),var(--bg-2));border-bottom:1px solid var(--line-soft);padding:20px 24px;display:flex;align-items:center;justify-content:space-between}
.server-head h3{font-family:var(--font-d);font-size:18px;color:#fff;font-weight:700}
.server-tag{font-size:12px;color:#16130a;background:linear-gradient(120deg,var(--gold-2),var(--gold));padding:3px 12px;border-radius:30px;font-weight:600;white-space:nowrap}
.server-body{padding:8px 24px 16px}
.spec-row{display:flex;align-items:center;justify-content:space-between;padding:13px 0;border-bottom:1px dashed rgba(255,255,255,.07)}
.spec-row:last-child{border-bottom:none}
.spec-name{display:flex;align-items:center;gap:10px;color:var(--ink-dim);font-size:14px}
.spec-name svg{width:16px;height:16px;color:var(--gold-dim)}
.spec-value{font-size:14px;color:var(--gold-2);font-weight:600}

.versions{background:var(--bg-1)}
.version-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.version-card{background:var(--bg-2);border:1px solid var(--line-soft);border-radius:16px;overflow:hidden;transition:transform .35s,box-shadow .35s}
.version-card:hover{transform:translateY(-8px);box-shadow:0 22px 46px rgba(0,0,0,.45)}
.version-media{position:relative;height:178px;overflow:hidden}
.version-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.version-card:hover .version-media img{transform:scale(1.06)}
.version-media::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,var(--bg-2))}
.version-tag{position:absolute;top:14px;right:14px;z-index:2;font-size:12px;color:#fff;background:linear-gradient(120deg,var(--red-2),var(--red));padding:4px 12px;border-radius:30px;font-weight:600;letter-spacing:1px}
.version-body{padding:6px 22px 24px}
.version-body h3{font-family:var(--font-d);font-size:19px;color:#fff;margin:8px 0 8px;font-weight:700}
.version-body p{font-size:14px;color:var(--ink-dim);font-weight:300;line-height:1.7;margin-bottom:16px}
.version-chips{display:flex;flex-wrap:wrap;gap:8px}
.version-chips span{font-size:12px;color:var(--gold-2);background:rgba(212,175,55,.08);border:1px solid var(--line);padding:4px 12px;border-radius:6px;font-weight:400}

.tools{background:var(--bg-0)}
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tool-card{background:var(--bg-2);border:1px solid var(--line-soft);border-radius:16px;padding:26px;display:flex;flex-direction:column;transition:transform .35s,border-color .35s}
.tool-card:hover{transform:translateY(-6px);border-color:var(--line)}
.tool-top{display:flex;align-items:center;gap:16px;margin-bottom:16px}
.tool-icon{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,rgba(212,175,55,.15),rgba(193,59,47,.1));border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--gold-2);flex-shrink:0}
.tool-icon svg{width:24px;height:24px}
.tool-title{min-width:0}
.tool-title h3{font-size:16px;color:#fff;font-weight:600;line-height:1.4}
.tool-meta{font-size:12px;color:var(--ink-faint);margin-top:3px}
.tool-desc{font-size:14px;color:var(--ink-dim);font-weight:300;margin-bottom:16px;flex-grow:1}
.tool-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.tool-chips span{font-size:12px;color:var(--ink-dim);background:rgba(255,255,255,.04);border:1px solid var(--line-soft);padding:4px 10px;border-radius:6px}
.tool-link{display:flex;align-items:center;justify-content:center;gap:8px;padding:12px;border-radius:10px;background:linear-gradient(120deg,rgba(212,175,55,.14),rgba(193,59,47,.1));border:1px solid var(--line);color:var(--gold-2);font-size:14px;font-weight:600;transition:background .3s,color .3s}
.tool-link svg{width:16px;height:16px}
.tool-link:hover{background:linear-gradient(120deg,var(--gold-2),var(--gold));color:#13100a}

.contact{background:radial-gradient(800px 420px at 50% -10%,rgba(212,175,55,.07),transparent 60%),var(--bg-1)}
.contact-grid{display:flex;gap:30px;justify-content:center;flex-wrap:wrap}
.qr-card{width:300px;background:var(--bg-2);border:1px solid var(--line-soft);border-radius:18px;padding:30px 26px;text-align:center;transition:transform .3s,border-color .3s}
.qr-card:hover{transform:translateY(-6px);border-color:var(--line)}
.qr-head{font-size:17px;color:#fff;font-weight:600;margin-bottom:18px;display:flex;align-items:center;justify-content:center;gap:10px}
.qr-head svg{width:24px;height:24px}
.qr-head .wx{color:#2ecc71}
.qr-head .qq{color:#4aa3e8}
.qr-box{width:180px;height:180px;margin:0 auto 16px;padding:12px;background:#fff;border-radius:14px;box-shadow:0 10px 30px rgba(0,0,0,.4)}
.qr-box img{width:100%;height:100%;object-fit:contain}
.qr-desc{font-size:13px;color:var(--ink-faint)}

.footer{background:#06080d;border-top:1px solid var(--line);padding:64px 0 30px;position:relative}
.footer::before{content:'';position:absolute;top:-1px;left:50%;transform:translateX(-50%);width:70%;height:1px;background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:.5}
.footer-brand{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;margin-bottom:34px}
.footer-logo{display:flex;align-items:center;gap:12px;font-family:var(--font-d);font-weight:700;font-size:26px;color:var(--gold-2)}
.footer-logo .mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#d4af37,#8a6d26);display:flex;align-items:center;justify-content:center;color:#0b0f18}
.footer-slogan{font-size:15px;color:var(--ink-dim);border:1px solid var(--line-soft);padding:9px 20px;border-radius:40px;background:rgba(212,175,55,.05);display:flex;align-items:center;gap:8px}
.footer-slogan svg{width:16px;height:16px;color:var(--gold)}
.group-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:40px}
.group-card{display:flex;align-items:center;gap:14px;background:var(--bg-2);border:1px solid var(--line-soft);border-radius:12px;padding:14px 16px;cursor:pointer;transition:border-color .25s,transform .25s;user-select:none}
.group-card:hover{border-color:var(--line);transform:translateY(-3px)}
.group-ico{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,rgba(212,175,55,.18),rgba(193,59,47,.1));border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--gold-2);flex-shrink:0}
.group-ico svg{width:19px;height:19px}
.group-info{flex:1;min-width:0}
.group-label{font-size:12px;color:var(--ink-faint);letter-spacing:1px}
.group-num{font-size:17px;color:var(--gold-2);font-weight:600;font-family:var(--font-d);letter-spacing:1px}
.group-copy{color:var(--ink-faint);font-size:13px;opacity:.6;transition:opacity .2s}
.group-card:hover .group-copy{opacity:1;color:var(--gold-2)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding-top:24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;font-size:13px;color:var(--ink-faint)}
.beian{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line-soft);background:rgba(212,175,55,.05);color:var(--ink-dim);padding:4px 14px;border-radius:30px}
.beian svg{width:13px;height:13px;color:var(--gold)}
.footer-note{display:inline-flex;align-items:center;gap:6px}

.toast{position:fixed;bottom:34px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--bg-3);border:1px solid var(--line);color:var(--ink);padding:12px 24px;border-radius:40px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;z-index:2000;box-shadow:0 12px 34px rgba(0,0,0,.5)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:1024px){
  .learning-grid{grid-template-columns:repeat(2,1fr)}
  .server-grid{grid-template-columns:repeat(2,1fr)}
  .version-grid{grid-template-columns:repeat(2,1fr)}
  .tools-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .section{padding:70px 0}
  .nav-toggle{display:flex}
  .nav-menu{position:fixed;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:rgba(8,11,18,.98);border-bottom:1px solid var(--line);padding:8px 0;height:auto;display:none;box-shadow:0 20px 40px rgba(0,0,0,.5)}
  .nav-menu.open{display:flex}
  .nav-menu a{height:48px;padding:0 24px;justify-content:center}
  .hero{min-height:84vh}
  .hero-sub{font-size:15px}
  .learning-grid,.server-grid,.version-grid,.tools-grid,.group-grid{grid-template-columns:1fr}
  .footer-brand{flex-direction:column;align-items:flex-start}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media(max-width:480px){
  .learning-grid,.server-grid,.version-grid,.tools-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .hero-scroll span{animation:none}
}