@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&display=swap');
:root{--bg:#F8FAFC;--surface:#FFFFFF;--line:rgba(15,23,42,.06);--ink:#0F172A;--muted:#64748B;--purple:#8B5CF6;--grad:linear-gradient(135deg,#8B5CF6,#4F46E5)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;color:var(--ink);min-height:100vh;line-height:1.7;background:radial-gradient(800px 600px at 10% -10%,rgba(139,92,246,.08),transparent 60%),var(--bg)}
.container{max-width:600px;margin:0 auto;padding:40px 20px 20px}
.back-btn{display:inline-flex;align-items:center;gap:6px;color:var(--purple);text-decoration:none;font-weight:600;margin-bottom:28px;padding:8px 16px;background:rgba(139,92,246,.08);border-radius:99px}
.back-btn:hover{background:rgba(139,92,246,.15)}
h1{font-size:26px;font-weight:900;margin-bottom:22px;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
h2{font-size:19px;font-weight:800;margin:28px 0 14px;color:var(--ink);border-left:4px solid var(--purple);padding-left:12px}
p{color:var(--muted);margin-bottom:14px;font-size:15px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:14px;box-shadow:0 4px 6px -1px rgba(0,0,0,.02)}
.card h3{font-size:17px;margin-bottom:8px;color:var(--ink)}
.foot-nav{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;padding:30px 20px;border-top:1px solid var(--line);margin-top:40px}
.foot-nav a{padding:8px 14px;background:var(--surface);border:1px solid var(--line);border-radius:99px;font-size:12px;font-weight:600;color:var(--muted);text-decoration:none}
.foot-nav a:hover{border-color:rgba(139,92,246,.4);color:var(--purple)}
.footer{text-align:center;padding:0 20px 30px;font-size:11px;color:var(--muted)}