:root{--bg:#f7fafc;--card:#fff;--ink:#173042;--muted:#647684;--line:#dce8ee;--accent:#11bfd1;--accent2:#ff6d5d;--link:#087f96}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:linear-gradient(180deg,#f4fbfd 0%,var(--bg) 28%,var(--bg) 100%);line-height:1.65}
.container{width:min(920px,calc(100% - 32px));margin:0 auto}header{padding:56px 0 28px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700}.dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,#15d6c7,#7f59f0 55%,#ff6d5d)}
h1{font-size:clamp(2rem,6vw,3.4rem);line-height:1.1;margin:18px 0 12px}h2{font-size:1.35rem;margin:38px 0 10px}p,li{color:#304b5c}.muted{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:0 10px 30px rgba(24,70,90,.06);margin:18px 0}.app-card{display:flex;justify-content:space-between;gap:18px;align-items:center}
.button{display:inline-block;text-decoration:none;color:#fff;background:#145e73;padding:10px 16px;border-radius:999px;white-space:nowrap}a{color:var(--link)}ul{padding-left:1.2rem}.notice{border-left:4px solid var(--accent);background:#edfafd;padding:14px 16px;border-radius:8px}
footer{border-top:1px solid var(--line);margin-top:56px;padding:28px 0 48px;color:var(--muted);font-size:.92rem}nav a{margin-right:14px}@media(max-width:640px){.app-card{align-items:flex-start;flex-direction:column}}