@import"https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap";main{min-height:calc(100vh - 140px)}:root{--bg-base: #f4f7fb;--card: #ffffff;--muted: #546277;--text: #0b1526;--brand: #1f6feb;--brand-2: #0ea5e9;--accent: #22d3ee;--radius: 14px;--border: rgba(12,21,38,.12);--border-strong: rgba(12,21,38,.2);--surface: rgba(12,21,38,.04);--surface-strong: rgba(12,21,38,.08);--glass: #ffffff;--sheet-bg: #ffffff;--grid-line: rgba(12,21,38,.06);--input-bg: rgba(12,21,38,.04);--btn-bg: var(--surface);--btn-glow: rgba(31,111,235,.18);--card-grad: var(--card);--card-inset: none;--shadow-soft: 0 8px 20px rgba(12,21,38,.08);--bg-glow-1: transparent;--bg-glow-2: transparent;--focus-ring: rgba(31,111,235,.35);color-scheme:light}:root[data-theme=dark]{--bg-base: #0b0f14;--card: #0f1621;--muted: #97a4b8;--text: #e6edf6;--brand: #4ea1ff;--brand-2: #22d3ee;--accent: #22d3ee;--border: rgba(255,255,255,.08);--border-strong: rgba(255,255,255,.16);--surface: rgba(255,255,255,.06);--surface-strong: rgba(255,255,255,.1);--glass: #0f1621;--sheet-bg: #0f1621;--grid-line: rgba(255,255,255,.05);--input-bg: rgba(255,255,255,.05);--btn-bg: rgba(255,255,255,.06);--btn-glow: rgba(78,161,255,.2);--card-grad: var(--card);--card-inset: none;--shadow-soft: 0 10px 24px rgba(0,0,0,.35);--bg-glow-1: transparent;--bg-glow-2: transparent;--focus-ring: rgba(78,161,255,.45);color-scheme:dark}*{box-sizing:border-box}html,body,#app{height:100%}body{margin:0;font-family:Space Grotesk,Noto Sans,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg-base);letter-spacing:.01em}a{color:inherit;text-decoration:none}.container{max-width:1200px;margin:0 auto;padding:0 20px}.grid{display:grid;gap:24px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:12px;border:1px solid var(--border-strong);background:var(--btn-bg);color:var(--text);font-weight:600;transition:.2s transform,.2s box-shadow,.2s border-color}.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px var(--btn-glow);border-color:var(--brand)}.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 10px 26px #1f6feb47}.card{background:var(--card-grad);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-soft)}.nav{position:sticky;top:0;z-index:50;background:var(--glass);border-bottom:1px solid var(--border)}.nav .bar{display:flex;align-items:center;height:64px}.brand{display:flex;align-items:center;gap:10px;font-weight:700}.brand svg{width:28px;height:28px}.navlinks{display:flex;gap:18px;margin-left:auto}.navlinks a{padding:10px 12px;border-radius:10px}.navlinks a.active,.navlinks a:hover{background:var(--surface)}.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--border-strong);border-radius:0;padding:8px;color:var(--text);width:40px;height:36px;align-items:center;justify-content:center}.menu-icon{width:20px;height:20px;display:block}.theme-select{margin-left:24px;display:inline-flex;align-items:center;gap:8px}.theme-swatch{width:14px;height:14px;border:1px solid var(--border-strong);border-radius:0;background:#f4f7fb;cursor:pointer;padding:0}.theme-swatch.dark{background:#0b0f14}.theme-swatch.active{transform:translateY(-1px);box-shadow:0 8px 14px var(--btn-glow)}.theme-swatch:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}.hero{position:relative;overflow:hidden;padding:80px 0 40px}.hero h1{font-size:clamp(28px,6vw,56px);line-height:1.05;margin:0 0 16px}.hero p{max-width:720px;color:var(--muted);font-size:clamp(14px,2.4vw,18px)}.hero .cta{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap}.section{padding:56px 0}.section h2{font-size:clamp(22px,4.5vw,34px);margin:0 0 12px}.section .muted{color:var(--muted);max-width:800px}.features{grid-template-columns:repeat(3,1fr)}@media (max-width: 960px){.features{grid-template-columns:1fr 1fr}.navlinks{display:none}.menu-btn{display:inline-flex}.theme-select{margin-left:auto}.menu-btn{margin-left:8px}}@media (max-width: 640px){.features{grid-template-columns:1fr}}.footer{border-top:1px solid var(--border);padding:28px 0;color:var(--muted)}.sheet{position:fixed;inset:0 0 auto auto;top:68px;right:12px;width:min(92vw,320px);background:var(--sheet-bg);border:1px solid var(--border);border-radius:16px;padding:12px;display:none;flex-direction:column;gap:6px;box-shadow:var(--shadow-soft)}.sheet.open{display:flex}.sheet a{padding:12px;border-radius:10px}.sheet a:hover{background:var(--surface)}.bg-grid{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;opacity:.08;background-image:linear-gradient(to right,var(--grid-line) 1px,transparent 1px),linear-gradient(to bottom,var(--grid-line) 1px,transparent 1px);background-size:32px 32px}.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}@media (max-width: 1024px){.cards-3{grid-template-columns:1fr 1fr}}@media (max-width: 640px){.cards-3{grid-template-columns:1fr}}.card h3{margin:0 0 6px;font-size:clamp(16px,2.4vw,20px)}.card p{margin:8px 0 0}.card,.card *{word-break:break-word}@media (max-width: 640px){.card .btn{width:100%}}