:root { color-scheme: dark; font-family: "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif; }
* { box-sizing: border-box; }
body { display: grid; min-width: 320px; min-height: 100vh; margin: 0; color: #edf3fc; background: #10141b; place-items: center; }
.page { width: min(620px, calc(100% - 40px)); }
.hero { padding: 52px 30px; text-align: center; border: 1px solid #2a3544; border-radius: 14px; background: linear-gradient(145deg, #171e29, #11161e); }
.brand-icon { width: 72px; height: 72px; border-radius: 18px; box-shadow: 0 12px 30px #0006; }
.eyebrow { margin: 22px 0 5px; color: #779bd0; font-size: 12px; font-weight: 700; letter-spacing: .16em; }
h1 { margin: 0; font-size: clamp(34px, 6vw, 48px); letter-spacing: .08em; }
.intro { margin: 12px 0 28px; color: #aebdce; font-size: 16px; }
.download { display: inline-flex; flex-direction: column; gap: 5px; min-width: 288px; padding: 13px 24px; color: white; text-decoration: none; border-radius: 7px; background: #447dd5; font-size: 17px; font-weight: 700; transition: background .16s ease, transform .16s ease; }
.download:hover { background: #548ce3; transform: translateY(-1px); }
.download span { color: #dce9ff; font-size: 12px; font-weight: 400; }
@media (max-width: 680px) { .page { width: min(100% - 28px, 520px); } .hero { padding: 38px 18px; } .download { min-width: min(100%, 288px); } }