*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Microsoft YaHei",Arial,sans-serif;background:#071225;color:#eef6ff;line-height:1.85;padding-bottom:78px}
a{color:inherit;text-decoration:none}
.header{position:sticky;top:0;z-index:9;background:rgba(7,18,37,.96);border-bottom:1px solid rgba(255,255,255,.08);padding:12px 14px}
.logo{font-size:19px;font-weight:800;color:#70b7ff}
.nav{display:flex;gap:8px;overflow-x:auto;margin-top:10px;padding-bottom:2px}
.nav a{white-space:nowrap;background:#10284d;border:1px solid rgba(112,183,255,.18);padding:7px 11px;border-radius:999px;font-size:14px;color:#cfe8ff}
.hero{padding:28px 16px 18px;background:linear-gradient(180deg,#0d2b58,#071225)}
.hero h1{font-size:28px;line-height:1.35;margin-bottom:12px}
.hero p{font-size:16px;color:#d9ecff}
.card{margin:14px 12px;padding:18px 16px;background:#0d1d38;border:1px solid rgba(255,255,255,.08);border-radius:16px;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.card h2{font-size:21px;color:#79bdff;margin-bottom:8px}
.card p{font-size:16px;color:#e8f3ff}
.notice{margin:14px 12px;padding:14px 16px;border-radius:14px;background:#112b4d;border-left:4px solid #79bdff;color:#e8f3ff}
.btns{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:14px 12px}
.btn{display:block;text-align:center;border-radius:12px;padding:13px 8px;background:#1f73d8;font-weight:700}
.footer{padding:22px 14px 90px;text-align:center;color:#9db7d2;font-size:13px}
.bottom{position:fixed;left:0;right:0;bottom:0;background:#081a33;border-top:1px solid rgba(255,255,255,.1);display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:10px 12px;z-index:10}
.bottom a{background:#1f73d8;text-align:center;padding:12px 8px;border-radius:12px;font-weight:800}
@media(min-width:700px){body{max-width:520px;margin:0 auto;background:#071225}.bottom{max-width:520px;margin:0 auto}}

.hero-chat{padding:0 12px 6px;background:#071225}
.hero-chat-btn{display:block;text-align:center;background:#ffb21a;color:#071225;border-radius:14px;padding:14px 10px;font-weight:900;font-size:17px;box-shadow:0 8px 18px rgba(255,178,26,.25)}
.float-chat{position:fixed;right:14px;bottom:86px;background:#ffb21a;color:#071225;border-radius:999px;padding:12px 15px;font-weight:900;z-index:20;box-shadow:0 8px 22px rgba(0,0,0,.28)}