:root{--bg: #0b1220;--bg-soft: #111a2e;--card: #16213a;--line: #24304d;--text: #e8edf6;--text-2: #9aa8c7;--accent: #38bdf8;--accent-2: #6366f1;--ok: #34d399;--warn: #fbbf24}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7}a{color:inherit;text-decoration:none}.container{max-width:1120px;margin:0 auto;padding:0 24px}.nav{position:sticky;top:0;z-index:50;background:#0b1220d9;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700}.logo-badge{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:linear-gradient(135deg,var(--accent),var(--accent-2));font-size:18px}.nav-links{display:flex;align-items:center;gap:26px;color:var(--text-2);font-size:15px}.nav-links a:hover{color:var(--text)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:all .2s}.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}.btn-primary:hover{filter:brightness(1.12);transform:translateY(-1px)}.btn-ghost{border-color:var(--line);color:var(--text);background:transparent}.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}.btn-sm{padding:8px 16px;font-size:14px}.hero{padding:96px 0 72px;text-align:center;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:-40% -20% auto;height:70%;background:radial-gradient(closest-side,rgba(56,189,248,.16),transparent);pointer-events:none}.hero-tag{display:inline-block;padding:6px 16px;border-radius:999px;font-size:13px;color:var(--accent);border:1px solid var(--line);background:var(--bg-soft);margin-bottom:24px}.hero h1{font-size:52px;line-height:1.25;letter-spacing:1px}.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}.hero-sub{max-width:720px;margin:20px auto 36px;color:var(--text-2);font-size:18px}.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.hero-meta{margin-top:22px;color:var(--text-2);font-size:13px}.section{padding:72px 0}.section-alt{background:var(--bg-soft);border-block:1px solid var(--line)}.section-head{text-align:center;margin-bottom:44px}.section-head h2{font-size:32px}.section-head p{color:var(--text-2);margin-top:10px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px 22px;transition:all .2s}.card:hover{transform:translateY(-3px);border-color:var(--accent)}.card-icon{font-size:28px;margin-bottom:12px}.card h3{font-size:17px;margin-bottom:8px}.card p{color:var(--text-2);font-size:14px}.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.dl-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px 24px;text-align:center;display:flex;flex-direction:column;gap:12px}.dl-card.recommend{border-color:var(--accent);box-shadow:0 0 0 1px #38bdf840,0 12px 40px -18px #38bdf866}.dl-flag{font-size:12px;color:var(--accent);letter-spacing:2px;min-height:18px}.dl-icon{font-size:40px}.dl-card h3{font-size:19px}.dl-card .desc{color:var(--text-2);font-size:14px;flex:1}.dl-spec{color:var(--text-2);font-size:13px}.dl-spec b{color:var(--text);font-weight:600}.dl-note{margin-top:26px;color:var(--text-2);font-size:14px;text-align:center}.dl-note code{background:var(--bg-soft);border:1px solid var(--line);border-radius:6px;padding:2px 8px;font-size:13px}.link-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.link-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;transition:all .2s}.link-card:hover{border-color:var(--accent);transform:translateY(-3px)}.link-card h3{font-size:16px;margin:10px 0 6px}.link-card p{color:var(--text-2);font-size:14px}.stack{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:34px}.stack span{padding:6px 14px;border-radius:999px;font-size:13px;color:var(--text-2);background:var(--bg-soft);border:1px solid var(--line)}.footer{border-top:1px solid var(--line);padding:36px 0;color:var(--text-2);font-size:14px}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.footer a:hover{color:var(--accent)}.footer-legal{display:flex;align-items:center;flex-wrap:wrap;gap:6px}@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.dl-grid,.link-grid{grid-template-columns:1fr}.hero h1{font-size:36px}.nav-links .desk-only{display:none}}@media(max-width:560px){.grid{grid-template-columns:1fr}.hero{padding:64px 0 48px}}