:root { --accent: #6c8cff; --bg: #0c1120; --card: rgba(255,255,255,.06); --text: #eef1ff; --muted: #9aa3c0; }
* { box-sizing: border-box; }
body { margin: 0; color: var(--text); font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif; background: var(--bg); }
.bg { position: fixed; inset: 0; z-index: -1;
  background: radial-gradient(800px 400px at 20% -5%, rgba(108,140,255,.35), transparent),
              radial-gradient(700px 380px at 90% 10%, rgba(64,224,208,.18), transparent), var(--bg); }
/* 自定义背景图层: 原始尺寸居中, 超出视口才等比缩小, 绝不拉伸; 未覆盖处透出默认背景 */
#bgImg { position: fixed; left: 50%; top: 50%; transform: translate(-50%, -50%);
  max-width: 100vw; max-height: 100vh; z-index: -1; pointer-events: none; display: none; }
.wrap { max-width: 860px; margin: 0 auto; padding: 24px 16px 60px; }
.glass { background: var(--card); backdrop-filter: blur(14px); border: 1px solid rgba(255,255,255,.12); border-radius: 18px; }
.nav { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; }
.brand { display: flex; gap: 10px; align-items: center; }
.dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.logo { width: 30px; height: 30px; border-radius: 8px; }
.hero .logo { width: 84px; height: 84px; border-radius: 20px; margin-bottom: 10px; }
.badge { padding: 4px 12px; border-radius: 999px; background: rgba(108,140,255,.2); border: 1px solid rgba(108,140,255,.5); font-size: 12px; margin-left: 8px; }
.badge.dim { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.2); }
.badge.ok { background: rgba(46,204,113,.18); border-color: rgba(46,204,113,.5); }
.hero { margin-top: 18px; padding: 44px 32px; text-align: center; }
.hero h1 { margin: 0 0 8px; font-size: 34px; letter-spacing: 1px; }
.muted { color: var(--muted); } .small { font-size: 12px; } .center { text-align: center; margin-top: 22px; }
.cta { display: flex; gap: 12px; justify-content: center; align-items: center; margin: 22px 0 12px; flex-wrap: wrap; }
button { padding: 12px 26px; border-radius: 12px; border: none; background: var(--accent); color: #fff; font-size: 15px; cursor: pointer; }
button.ghost { background: rgba(255,255,255,.12); padding: 6px 14px; font-size: 12px; }
button:disabled { opacity: .45; cursor: not-allowed; }
.card { margin-top: 18px; padding: 20px; } .card h2 { margin: 0 0 12px; font-size: 15px; display: flex; justify-content: space-between; align-items: center; }
.files { display: flex; flex-direction: column; gap: 8px; }
.file { display: flex; justify-content: space-between; align-items: center; padding: 12px 14px; border-radius: 12px; background: rgba(0,0,0,.3); }
.file a { color: var(--accent); text-decoration: none; font-weight: 600; }