:root{--ink: #1a1f2c;--muted: #5c6478;--brand: #ae0e14;--brand-deep: #8a0b10;--page: #f7f3f3;--card: #ffffff;--line: #ebe3e3;--font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body.landing{margin:0;color:var(--ink);font-family:var(--font);line-height:1.6;background:radial-gradient(1200px 480px at 10% -10%,rgba(174,14,20,.1),transparent 55%),radial-gradient(900px 420px at 100% 0%,rgba(174,14,20,.05),transparent 50%),var(--page);-webkit-font-smoothing:antialiased}.skip{position:absolute;left:-999px;top:0}.skip:focus{left:12px;top:12px;z-index:40;background:#fff;padding:8px 12px}.top{position:sticky;top:0;z-index:30;background:#fffffff0;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.top-inner{display:flex;align-items:center;justify-content:space-between;height:52px;max-width:720px;margin:0 auto;padding:0 20px}.top-brand{display:inline-flex;align-items:center;gap:8px;font-size:16px;font-weight:700;color:var(--brand);text-decoration:none}.top-brand img{width:28px;height:28px;border-radius:6px;display:block}.top-cta{display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:8px;background:var(--brand);color:#fff;font-size:13px;font-weight:600;text-decoration:none}.top-cta:hover{background:var(--brand-deep)}main{max-width:720px;margin:0 auto;padding:36px 20px 48px}.hero{margin-bottom:40px}.hero h1{margin:0 0 14px;font-size:clamp(26px,5vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em}.hero-lead{margin:0 0 22px;font-size:16px;color:var(--muted);max-width:36em}.hero-actions{display:flex;flex-wrap:wrap;gap:10px}.btn-primary,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border-radius:8px;font-size:14px;font-weight:600;text-decoration:none}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-deep)}.btn-ghost{border:1px solid var(--line);background:var(--card);color:var(--ink)}.btn-ghost:hover{border-color:#c5cce0}.section{margin-bottom:32px;padding:22px;background:var(--card);border:1px solid var(--line);border-radius:12px}.section h2{margin:0 0 12px;font-size:18px;font-weight:650}.section p{margin:0;color:var(--muted);font-size:15px}.section a{color:var(--brand)}.steps{margin:0;padding-left:1.2em;color:var(--muted);font-size:15px}.steps li+li{margin-top:8px}.steps strong{color:var(--ink)}.faq{margin:0}.faq>div+div{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}.faq dt{margin:0 0 6px;font-size:14px;font-weight:650;color:var(--ink)}.faq dd{margin:0;font-size:14px;color:var(--muted)}.foot{max-width:720px;margin:0 auto;padding:8px 20px 40px;font-size:12px;color:var(--muted);text-align:center}.foot a{color:var(--brand);text-decoration:none}.foot p{margin:0 0 6px}