:root{--bg:#F6EDE4;--deep:#E8D8C8;--card:#FFF8F2;--soft:#F0E4D6;--ink:#1A1612;--text:#2A241C;--muted:#5A5048;--aux:#7A7068;--orange:#E07030;--copper:#B06030;--border:rgba(26,22,18,.12);--hot:rgba(224,112,48,.50);--shadow:0 12px 28px rgba(26,22,18,.10);--max:960px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden;padding-top:120px}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.top-rail{position:fixed;z-index:80;top:0;left:0;right:0;height:20px;background:var(--ink);color:#F6EDE4;font-size:12px}.top-rail-inner,.header-inner,.quick-nav-inner,.footer-inner{width:min(var(--max),calc(100% - 32px));margin:auto}.top-rail-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.text-button{border:0;background:transparent;color:#F6EDE4;padding:0 4px;min-height:20px}.site-header{position:fixed;z-index:75;top:20px;left:0;right:0;height:54px;background:var(--card);border-bottom:1px solid var(--orange)}.header-inner{height:54px;display:flex;align-items:center;justify-content:space-between}.brand-link,.header-actions{display:flex;align-items:center}.brand-link{min-width:44px;min-height:44px}.brand-logo{height:24px;max-width:112px;object-fit:contain}.brand-fallback{font-size:20px;font-weight:800;color:var(--ink)}.header-actions{gap:8px}.header-app,.menu-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:4px;font-size:14px}.header-app{padding:0 13px;border:1px solid var(--hot);background:var(--card);color:var(--ink)}.menu-button{padding:0 14px;border:1px solid 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