:root{color-scheme:dark;--bg:#080b14;--card:#121a2b;--line:rgba(90,130,255,.2);--txt:#eef2fb;--muted:#9ba9cc;--accent:#00d4ff;--grad:linear-gradient(135deg,#4f8cff,#00d4ff)}
*{box-sizing:border-box;margin:0;padding:0}
body{min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--txt);font-family:"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--accent);outline-offset:5px;border-radius:4px}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
header{border-bottom:1px solid var(--line);background:rgba(8,11,20,.95)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:76px}
.logo{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:800;flex-shrink:0}
.mark{width:38px;height:38px;border-radius:10px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff;box-shadow:0 0 18px rgba(79,140,255,.3)}
.logo small{display:block;font-size:10.5px;font-weight:500;color:var(--muted)}
nav{display:flex;gap:24px;align-items:center;font-size:14px}
nav a{white-space:nowrap;color:var(--muted);padding:12px 0}
nav a:hover,nav a[aria-current="page"]{color:var(--accent)}
main{flex:1;padding:70px 0 88px;background:radial-gradient(ellipse at 50% 0,rgba(79,140,255,.14),transparent 65%)}
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:36px}
.breadcrumb a:hover{color:var(--accent)}
.intro{text-align:center;margin-bottom:36px}
.kicker{font-size:12px;letter-spacing:3px;color:var(--accent)}
h1{font-size:40px;line-height:1.3;margin:12px 0 16px}
.intro p,.empty p{color:var(--muted)}
.empty{max-width:760px;margin:0 auto;text-align:center;padding:48px 32px;background:var(--card);border:1px solid var(--line);border-radius:18px}
.download-icon{width:56px;height:56px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;border:1px solid var(--line);border-radius:14px;color:var(--accent);background:rgba(79,140,255,.1)}
.download-icon svg{width:28px;height:28px}
h2{font-size:22px;margin-bottom:12px}
.actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:28px}
.btn{display:inline-block;padding:11px 24px;border-radius:9px;font-size:14px;font-weight:700;border:1px solid var(--line)}
.btn.primary{background:var(--grad);color:#fff;border-color:transparent}
.btn:hover{box-shadow:0 6px 20px rgba(79,140,255,.2)}
footer{padding:24px 0;border-top:1px solid var(--line);text-align:center;font-size:12px;color:var(--muted)}
footer p+p{margin-top:6px}
@media(max-width:680px){.header-row{flex-wrap:wrap;gap:4px;padding-top:14px}nav{width:100%;gap:22px;overflow-x:auto}main{padding:32px 0 56px}h1{font-size:30px}.empty{padding:32px 20px}.wrap{padding:0 20px}}