:root{--brand: #2a9df4;--brand-soft: #16324a;--bg: #0b1220;--card: #111b2e;--text: #e8eef6;--muted: #8b9bb4}*{box-sizing:border-box;margin:0}body{font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text)}.site{min-height:100vh}.nav{position:sticky;top:0;z-index:10;background:#0b1220d9;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid #1c2a42}.nav-inner{max-width:1080px;margin:0 auto;padding:14px 24px;display:flex;justify-content:space-between;align-items:center}.brand{font-size:20px;font-weight:800}.brand span{color:var(--brand)}.nav nav{display:flex;gap:22px}.nav a{color:var(--muted);text-decoration:none;font-size:14px}.nav a:hover{color:var(--text)}.nav .nav-admin{color:var(--brand)}.hero{position:relative;overflow:hidden;padding:110px 24px 90px;text-align:center}.hero-glow{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(600px 300px at 50% 0%,rgba(42,157,244,.18),transparent);pointer-events:none}.hero-inner{position:relative;max-width:860px;margin:0 auto}.hero h1{font-size:44px;line-height:1.25;letter-spacing:-1px}.hero h1 em{font-style:normal;color:var(--brand)}.sub{margin-top:18px;font-size:17px;color:var(--muted)}.hero-actions{margin-top:34px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.btn-primary{background:var(--brand);color:#fff;border:0;padding:14px 30px;border-radius:999px;font-size:16px;font-weight:600;cursor:pointer;transition:transform .15s,box-shadow .15s}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px #2a9df459}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-ghost{padding:14px 30px;border-radius:999px;border:1px solid #2a3b58;color:var(--muted);text-decoration:none;font-size:15px}.hero-meta{margin-top:18px;font-size:13px;color:var(--muted)}section h2{text-align:center;font-size:28px;margin-bottom:34px}.features{max-width:1080px;margin:0 auto;padding:70px 24px}.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}.feature-card{background:var(--card);border:1px solid #1c2a42;border-radius:14px;padding:26px;transition:transform .15s,border-color .15s}.feature-card:hover{transform:translateY(-4px);border-color:var(--brand)}.feature-icon{font-size:30px;margin-bottom:14px}.feature-card h3{font-size:17px;margin-bottom:8px}.feature-card p{font-size:14px;color:var(--muted);line-height:1.7}.changelog{max-width:720px;margin:0 auto;padding:40px 24px 70px;text-align:center}.changelog-body{background:var(--card);border:1px solid #1c2a42;border-radius:12px;padding:20px;text-align:left;white-space:pre-wrap;font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:22px}.hint{margin-top:12px;font-size:12px;color:var(--muted)}.hint code{color:var(--brand)}.contact{max-width:720px;margin:0 auto;padding:40px 24px 70px}.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.contact-item{background:var(--card);border:1px solid #1c2a42;border-radius:12px;padding:16px 20px}.contact-label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}.contact-value{font-size:15px;font-weight:600;word-break:break-all}.footer{border-top:1px solid #1c2a42;padding:30px 24px;text-align:center;font-size:14px}.footer .muted{margin-top:8px;font-size:12px;color:var(--muted)}