:root{--c-bg: #f7f8fa;--c-surface: #ffffff;--c-ink: #0f172a;--c-ink-soft: #475569;--c-ink-faint: #94a3b8;--c-line: #e2e8f0;--c-line-soft: #eef2f6;--c-brand: #4f46e5;--c-brand-dark: #4338ca;--c-brand-soft: #eef2ff;--c-accent: #0ea5e9;--c-ok: #059669;--radius: 12px;--radius-sm: 8px;--shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .06);--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--maxw: 1080px;--font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);background:var(--c-bg);color:var(--c-ink);line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1,h2,h3{line-height:1.25;color:var(--c-ink);font-weight:700}h1{font-size:clamp(1.9rem,4vw,2.6rem);letter-spacing:-.02em}h2{font-size:clamp(1.4rem,3vw,1.8rem);letter-spacing:-.01em}a{color:var(--c-brand);text-decoration:none}a:hover{text-decoration:underline}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{background:#ffffffd9;backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--c-line);position:sticky;top:0;z-index:50}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.15rem;color:var(--c-ink);letter-spacing:-.02em}.brand:hover{text-decoration:none}.brand .dot{width:10px;height:10px;border-radius:3px;background:linear-gradient(135deg,var(--c-brand),var(--c-accent))}.nav{display:flex;gap:22px;align-items:center}.nav a{color:var(--c-ink-soft);font-size:.93rem;font-weight:500}.nav a:hover{color:var(--c-brand);text-decoration:none}.nav .nav-lang{border:1px solid var(--c-line);border-radius:99px;padding:4px 11px;font-size:.82rem;font-weight:600;color:var(--c-ink-soft)}.nav .nav-lang:hover{border-color:var(--c-brand);color:var(--c-brand)}@media(max-width:640px){.site-header .wrap{flex-direction:column;align-items:flex-start;gap:12px;padding-block:14px 12px}.nav{display:flex;gap:14px;width:100%;overflow-x:auto;padding-bottom:2px;scrollbar-width:none}.nav::-webkit-scrollbar{display:none}.nav a{flex:0 0 auto;font-size:.86rem}}.site-footer{border-top:1px solid var(--c-line);margin-top:72px;padding:36px 0;color:var(--c-ink-faint);font-size:.86rem;background:var(--c-surface)}.site-footer .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;align-items:center}.site-footer a{color:var(--c-ink-soft)}.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:var(--radius-sm);font-weight:600;font-size:.95rem;cursor:pointer;border:1px solid transparent;transition:all .15s ease;text-decoration:none;line-height:1}.btn:hover{text-decoration:none}.btn:disabled{opacity:.48;cursor:not-allowed;transform:none;box-shadow:none}.btn:disabled:hover{transform:none}.btn-primary{background:var(--c-brand);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{background:var(--c-brand-dark);transform:translateY(-1px)}.btn-ghost{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-line)}.btn-ghost:hover{border-color:var(--c-ink-faint)}.btn-lg{padding:14px 26px;font-size:1rem}.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow)}label.field{display:block;margin-bottom:14px}label.field>span{display:block;font-size:.82rem;font-weight:600;color:var(--c-ink-soft);margin-bottom:5px}input,textarea,select{width:100%;padding:9px 11px;font:inherit;font-size:.92rem;color:var(--c-ink);background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-sm);transition:border-color .15s,box-shadow .15s}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--c-brand);box-shadow:0 0 0 3px var(--c-brand-soft)}textarea{resize:vertical;min-height:80px}.crumbs{border-bottom:1px solid var(--c-line-soft);background:var(--c-surface)}.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:10px 0;font-size:.84rem}.crumbs li{display:flex;align-items:center;gap:6px}.crumbs li:not(:first-child):before{content:"/";color:var(--c-ink-faint)}.crumbs a{color:var(--c-ink-soft)}.crumbs a:hover{color:var(--c-brand)}.crumbs span[aria-current]{color:var(--c-ink);font-weight:500;max-width:22ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.muted{color:var(--c-ink-soft)}.faint{color:var(--c-ink-faint)}.center{text-align:center}