:root{--primary:rgb(70,139,223);--primary-dark:#226cc7;--text:#17233d;--muted:#66788f;--bg:#f5f9ff;--card:#ffffff;--line:#dce9f8;--soft:#eef6ff;--shadow:0 14px 35px rgba(70,139,223,.14);--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;background:linear-gradient(180deg,#eef7ff 0%,#ffffff 46%,#f7fbff 100%);color:var(--text);line-height:1.72}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(220,233,248,.9)}.topbar{height:62px;display:flex;align-items:center;justify-content:space-between;padding:0 16px}.brand{display:flex;align-items:center;gap:10px}.logo{width:36px;height:36px;border-radius:12px;object-fit:cover;box-shadow:0 8px 20px rgba(70,139,223,.2)}.brand-text{font-size:18px;font-weight:800;letter-spacing:.2px}.nav-download,.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:999px;background:linear-gradient(135deg,var(--primary),#6eb7ff);color:#fff!important;font-weight:800;box-shadow:0 12px 26px rgba(70,139,223,.28);border:0}.nav-download{min-height:36px;padding:0 16px;font-size:14px}.nav-tabs{display:flex;gap:8px;overflow-x:auto;padding:0 14px 12px}.nav-tabs a{white-space:nowrap;padding:8px 14px;border-radius:999px;color:var(--muted);font-size:14px;background:#f4f8fd}.nav-tabs a.active{background:rgba(70,139,223,.12);color:var(--primary);font-weight:700}.page-main{padding-bottom:28px}.hero{position:relative;overflow:hidden;padding:28px 18px 32px;background:radial-gradient(circle at top right,rgba(70,139,223,.26),transparent 36%),linear-gradient(135deg,#f8fcff 0%,#e6f2ff 52%,#ffffff 100%)}.hero:before{content:"";position:absolute;right:-70px;top:28px;width:180px;height:180px;background:rgba(70,139,223,.12);border-radius:50%;filter:blur(4px)}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:999px;background:rgba(70,139,223,.12);color:var(--primary);font-weight:700;font-size:13px}.hero h1,.page-title h1{font-size:30px;line-height:1.2;margin:16px 0 12px;letter-spacing:-.6px}.hero p,.page-title p{color:var(--muted);font-size:16px;margin:0 0 20px}.hero-actions{display:flex;align-items:center;gap:12px;margin:22px 0}.trust-note{font-size:13px;color:#7a8aa0}.app-showcase{margin:24px auto 0;padding:14px;max-width:280px;border-radius:34px;background:rgba(255,255,255,.68);box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.85)}.app-showcase img{border-radius:26px}.section{padding:26px 18px}.section h2{font-size:23px;line-height:1.28;margin:0 0 12px}.section p{color:var(--muted);margin:0 0 12px}.card-grid{display:grid;grid-template-columns:1fr;gap:14px;margin-top:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:0 10px 25px rgba(42,87,140,.07)}.card h3{margin:0 0 8px;font-size:18px}.card p{margin:0;color:var(--muted);font-size:15px}.icon-pill{width:42px;height:42px;border-radius:15px;background:linear-gradient(135deg,rgba(70,139,223,.16),rgba(110,183,255,.22));display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:900;margin-bottom:12px}.page-title{padding:28px 18px 12px;background:linear-gradient(180deg,#edf7ff 0%,#fff 100%)}.content-block{padding:10px 18px 28px}.article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}.article h2{font-size:22px;margin:0 0 12px}.article h3{font-size:18px;margin:18px 0 8px}.article p,.article li{color:var(--muted);font-size:15px}.steps{counter-reset:step;display:grid;gap:12px;margin:18px 0}.step{position:relative;padding:16px 16px 16px 54px;border-radius:18px;background:var(--soft);border:1px solid var(--line)}.step:before{counter-increment:step;content:counter(step);position:absolute;left:16px;top:17px;width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;font-weight:800}.faq-item{padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line);margin-bottom:12px}.faq-item h3{font-size:16px;margin:0 0 8px}.faq-item p{margin:0;color:var(--muted);font-size:15px}.cta-panel{margin:18px;border-radius:26px;background:linear-gradient(135deg,var(--primary),#78c2ff);padding:24px;color:#fff;box-shadow:0 16px 32px rgba(70,139,223,.28)}.cta-panel h2{margin:0 0 8px}.cta-panel p{margin:0 0 18px;color:rgba(255,255,255,.9)}.cta-panel .download-btn{background:#fff;color:var(--primary)!important;box-shadow:none}.site-footer{padding:16px 18px 28px;background:#f3f8ff}.footer-card{border-radius:24px;background:#fff;border:1px solid var(--line);padding:20px;text-align:center}.footer-logo{width:44px;height:44px;margin:0 auto 8px;border-radius:14px}.footer-card h2{margin:4px 0}.footer-card p{color:var(--muted);font-size:14px}.footer-links{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;color:var(--primary);font-weight:700;font-size:14px}.copyright{text-align:center;color:#8a99aa;font-size:12px;margin:16px 0 0}.mini-list{display:grid;gap:10px;margin:14px 0}.mini-list a{display:block;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:18px;color:var(--primary);font-weight:700}.notice{padding:14px 16px;border-radius:18px;background:#fff8e7;border:1px solid #ffe3a6;color:#87620d;font-size:14px;margin-top:14px}@media (min-width:520px){body{max-width:520px;margin:0 auto;background:#fff}.site-header{max-width:520px;margin:0 auto}.hero h1,.page-title h1{font-size:34px}.card-grid{grid-template-columns:1fr 1fr}.section,.hero,.page-title,.content-block{padding-left:24px;padding-right:24px}}