:root{--bg:#0f0f16;--surface:#191925;--soft:#232335;--line:#34344c;--primary:#8585ac;--accent:#b6b6d3;--text:#fff;--muted:#b9b9ca;--success:#69d5ad}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at 85% 0,#24243f 0,transparent 35%),var(--bg);color:var(--text);line-height:1.7}a{color:inherit;text-decoration:none}.wrap{width:min(1120px,calc(100% - 40px));margin:auto}.topbar{position:sticky;top:0;z-index:10;background:rgba(15,15,22,.9);backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.08)}.nav{height:72px;display:flex;align-items:center;justify-content:space-between}.brand{font-weight:800;font-size:22px;letter-spacing:.04em}.brand span{color:var(--accent)}.links{display:flex;align-items:center;gap:28px;color:var(--muted);font-size:15px}.links a:hover{color:#fff}.nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:11px 22px;border:1px solid #606080;background:#242438;color:#fff;font-weight:700}.hero{padding:96px 0 72px;text-align:center}.eyebrow{display:inline-block;padding:6px 14px;border:1px solid #444461;border-radius:999px;color:var(--accent);font-size:14px;background:rgba(89,89,126,.18)}h1{font-size:clamp(38px,7vw,68px);line-height:1.15;margin:24px auto 20px;max-width:860px;letter-spacing:-.04em}.lead{max-width:720px;margin:auto;color:var(--muted);font-size:18px}.actions{display:flex;gap:14px;justify-content:center;margin-top:34px}.btn.primary{background:linear-gradient(135deg,#4f4f76,#77779e);border-color:#8d8db0}.btn.ghost{background:transparent}.section{padding:72px 0}.section.alt{background:rgba(255,255,255,.025);border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05)}.section-head{margin-bottom:32px}.section-head h2{font-size:34px;margin-bottom:8px}.section-head p{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.card{background:linear-gradient(145deg,var(--surface),#171720);border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:0 18px 45px rgba(0,0,0,.18)}.icon{width:48px;height:48px;display:grid;place-items:center;border-radius:14px;background:#2b2b42;font-size:24px;margin-bottom:18px}.card h3{font-size:19px;margin-bottom:8px}.card p{color:var(--muted);font-size:15px}.price-card{position:relative}.price-card.recommend{border-color:#8585ac;box-shadow:0 18px 50px rgba(92,92,138,.22)}.tag{position:absolute;right:18px;top:18px;color:#101018;background:var(--accent);font-size:12px;font-weight:800;padding:4px 10px;border-radius:999px}.price{font-size:38px;font-weight:800;margin:14px 0 2px}.price small{font-size:16px;color:var(--muted)}.points{font-size:22px;color:var(--accent);font-weight:700}.meta{margin-top:18px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.notice{display:grid;grid-template-columns:1.4fr .6fr;gap:22px;align-items:stretch}.notice .card{height:100%}.list{list-style:none;display:grid;gap:12px;margin-top:18px}.list li{color:var(--muted);padding-left:24px;position:relative}.list li:before{content:"✓";position:absolute;left:0;color:var(--success);font-weight:800}.legal{font-size:14px;color:var(--muted)}.footer{padding:34px 0;border-top:1px solid rgba(255,255,255,.08);color:#8e8e9f;font-size:13px}.footer-row{display:flex;gap:16px;justify-content:space-between;align-items:center;flex-wrap:wrap}.footer a{text-decoration:underline}.breadcrumb{padding-top:38px;color:var(--muted);font-size:14px}.page-title{padding:42px 0 52px}.page-title h1{margin:0 0 14px;font-size:48px;max-width:none}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.detail-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px}.detail-card h3{margin-bottom:10px}.detail-card p{color:var(--muted)}.return-page{min-height:100vh;display:grid;place-items:center;padding:24px}.return-card{width:min(520px,100%);text-align:center;background:var(--surface);border:1px solid var(--line);padding:42px 28px;border-radius:24px}.return-icon{width:68px;height:68px;border-radius:50%;display:grid;place-items:center;margin:0 auto 20px;background:rgba(105,213,173,.14);color:var(--success);font-size:34px}.return-card p{color:var(--muted);margin:12px 0 24px}@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.notice,.detail-grid{grid-template-columns:1fr}}@media(max-width:640px){.wrap{width:min(100% - 28px,1120px)}.nav{height:62px}.links a:not(.nav-cta){display:none}.hero{padding:68px 0 52px}.lead{font-size:16px}.actions{flex-direction:column}.btn{width:100%}.section{padding:52px 0}.section-head h2{font-size:28px}.grid{grid-template-columns:1fr}.page-title h1{font-size:38px}.footer-row{display:block}.footer-row>*{display:block;margin-top:8px}}