:root{
    --primary:rgb(70,139,223);
    --primary-dark:#236fc7;
    --primary-soft:#e8f2ff;
    --text:#14233b;
    --muted:#66758c;
    --line:#e6edf7;
    --card:#ffffff;
    --bg:#f7fbff;
    --shadow:0 14px 40px rgba(35,111,199,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;background:linear-gradient(180deg,#eef7ff 0%,#ffffff 42%,#f7fbff 100%);color:var(--text);line-height:1.75;font-size:15px}
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,.86);backdrop-filter:blur(16px);border-bottom:1px solid rgba(230,237,247,.9)}
.header-inner{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;max-width:780px;margin:0 auto}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;color:#10213b;letter-spacing:.2px}
.brand img{width:34px;height:34px;border-radius:11px;box-shadow:0 8px 18px rgba(70,139,223,.25)}
.nav{display:flex;align-items:center;gap:12px;font-size:13px;color:#53627a;white-space:nowrap}
.nav a{padding:6px 0}.nav a:hover{color:var(--primary)}
.hero{padding:26px 16px 28px;max-width:780px;margin:0 auto}
.hero-card{overflow:hidden;border-radius:30px;background:linear-gradient(145deg,#ffffff 0%,#eef6ff 46%,#ddecff 100%);box-shadow:var(--shadow);padding:28px 22px;position:relative;border:1px solid rgba(255,255,255,.8)}
.hero-card:before{content:"";position:absolute;width:180px;height:180px;border-radius:50%;right:-70px;top:-70px;background:rgba(70,139,223,.18)}
.hero-card:after{content:"";position:absolute;width:110px;height:110px;border-radius:50%;left:-38px;bottom:-50px;background:rgba(70,139,223,.12)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:rgba(70,139,223,.12);color:var(--primary-dark);font-size:12px;font-weight:700;margin-bottom:12px}
h1{font-size:28px;line-height:1.25;margin:0 0 12px;letter-spacing:-.6px;color:#0f213a}
h2{font-size:22px;line-height:1.35;margin:0 0 12px;color:#132642}h3{font-size:17px;margin:0 0 8px;color:#132642}p{margin:0 0 12px;color:#52627a}.lead{font-size:16px;color:#45566f}.hero-actions{margin:18px 0 20px}.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;border-radius:999px;background:linear-gradient(135deg,var(--primary),#2b74cf);color:#fff!important;font-weight:800;box-shadow:0 12px 24px rgba(70,139,223,.28);border:none;letter-spacing:.2px}.download-btn:active{transform:translateY(1px)}.app-show{position:relative;z-index:1;margin:18px auto 0;max-width:260px;filter:drop-shadow(0 20px 28px rgba(35,111,199,.18))}.section{max-width:780px;margin:0 auto;padding:22px 16px}.section-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.section-title span{font-size:12px;color:var(--primary);font-weight:800;background:var(--primary-soft);padding:4px 10px;border-radius:999px}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 10px 28px rgba(27,43,70,.06);margin-bottom:14px}.grid{display:grid;grid-template-columns:1fr;gap:14px}.feature-card{position:relative;overflow:hidden}.feature-card:before{content:"";position:absolute;right:-24px;top:-24px;width:72px;height:72px;border-radius:24px;background:rgba(70,139,223,.1)}.icon{width:38px;height:38px;border-radius:14px;background:linear-gradient(135deg,#eaf4ff,#d9ebff);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:900;margin-bottom:10px}.steps{counter-reset:step}.step{position:relative;padding-left:48px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:0;top:18px;width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}.faq-item{border-bottom:1px solid var(--line);padding:16px 0}.faq-item:last-child{border-bottom:none}.faq-item strong{display:block;color:#132642;margin-bottom:6px}.notice{background:linear-gradient(135deg,#f4f9ff,#ffffff);border:1px solid #dbeaff;border-radius:22px;padding:18px;color:#45566f}.page-hero{max-width:780px;margin:0 auto;padding:30px 16px 10px}.page-hero .card{background:linear-gradient(135deg,#fff,#edf6ff)}.article-list a{display:block}.site-footer{padding:20px 16px 34px;max-width:780px;margin:0 auto}.footer-card{text-align:center;background:#10213b;color:#fff;border-radius:28px;padding:24px 18px;box-shadow:0 18px 40px rgba(16,33,59,.16)}.footer-card p{color:#c7d3e6}.footer-logo{width:44px;height:44px;margin:0 auto 10px;border-radius:14px}.footer-links{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin:14px 0;font-size:13px;color:#e8f2ff}.copyright{font-size:12px;margin-bottom:0!important;color:#90a2bf!important}.mini-nav{display:flex;gap:10px;overflow-x:auto;padding:0 16px 10px;max-width:780px;margin:0 auto}.mini-nav a{flex:0 0 auto;padding:8px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#53627a}.center{text-align:center}.download-panel{text-align:center;padding:24px 18px}.single-download-note{font-size:13px;color:#718096;margin-top:10px}.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.tag{font-size:12px;color:var(--primary-dark);background:var(--primary-soft);border-radius:999px;padding:5px 10px;font-weight:700}@media(min-width:720px){body:before{content:"";position:fixed;inset:0;background:#f6f9ff;z-index:-2}.grid.two{grid-template-columns:1fr 1fr}.hero-card{display:grid;grid-template-columns:1.1fr .9fr;align-items:center}h1{font-size:34px}}