:root{--dark:#0e141b;--dark-soft:#16202b;--primary:#0d9488;--primary-deep:#0f766e;--accent:#14b8a6;--accent-soft:#5eead4;--ink:#16211e;--ink-soft:#5b6b66;--bg:#fff;--bg-soft:#f6f8f7;--border:#e5ebe9;--radius:12px;--shadow:0 6px 24px #0e141b0f;--maxw:1160px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}ul,ol{list-style:none}.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}.nav{z-index:50;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);color:var(--ink);background:#ffffffeb;position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;height:66px;display:flex}.nav-brand{color:var(--ink);font-size:17px;font-weight:700}.nav-brand 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