/* 沿用 App 的深灰表盘与铜色；文档窄栏，主页以真实界面为主体。 */
:root{color-scheme:dark;--canvas:#111316;--surface:#1b1e22;--text:#edf0f3;--muted:#cfd4db;--border:#343940;--accent:#b87a46;--font:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at top,var(--surface),var(--canvas) 65%);color:var(--text);font:18px/1.8 var(--font)}a{color:var(--muted);text-underline-offset:5px}a:hover{color:var(--text)}a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}header,main,footer{width:min(100% - 40px,1040px);margin:auto}header{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:24px 0;border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:12px;font-weight:700;text-decoration:none;color:var(--text)}.brand img{border-radius:12px}nav{display:flex;gap:24px;flex-wrap:wrap}main{padding:56px 0 72px}article{max-width:760px;margin:auto}h1{font-size:38px;letter-spacing:-.03em;line-height:1.25;text-wrap:balance;margin:0 0 24px}h2{font-size:24px;margin:40px 0 12px}p{margin:0 0 20px}li{margin-bottom:10px}.muted{color:var(--muted)}.intro{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:48px}.intro h1{font-size:46px}.screens{display:flex;gap:12px;align-items:center}.screens img{width:calc(50% - 6px);height:auto;border-radius:18px;border:1px solid var(--border)}.action{display:inline-block;padding:10px 22px;border:1px solid var(--accent);border-radius:8px;text-decoration:none;color:var(--text);background:linear-gradient(var(--surface),var(--canvas))}.details{margin-top:56px;padding-top:24px;border-top:1px solid var(--border)}footer{border-top:1px solid var(--border);padding:24px 0 40px;color:var(--muted);font-size:15px}footer p{margin-bottom:8px}@media(max-width:700px){body{font-size:17px}.intro{grid-template-columns:1fr;gap:32px}.intro h1{font-size:36px}h1{font-size:30px}header{align-items:flex-start}nav{gap:16px}main{padding-top:36px}.screens{max-width:420px}.details{margin-top:36px}}