/* ===== 第1套：经典官网蓝 ===== */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#1f2937;background:#f5f7fb;line-height:1.8}
a{color:#1a5cff;text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
/* 头部 */
.s1-header{background:#fff;box-shadow:0 2px 12px rgba(15,40,90,.08);position:sticky;top:0;z-index:50}
.s1-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:#1a5cff}
.brand svg{flex:none}
.s1-nav{display:flex;gap:6px}
.s1-nav a{padding:8px 18px;border-radius:20px;color:#374151;font-size:15px;font-weight:500}
.s1-nav a:hover{background:#eef4ff;text-decoration:none;color:#1a5cff}
.s1-nav a.on{background:#1a5cff;color:#fff}
/* Hero */
.s1-hero{background:linear-gradient(135deg,#0f3aa8 0%,#1a5cff 55%,#3b82f6 100%);color:#fff;padding:88px 0 96px;position:relative;overflow:hidden}
.s1-hero::after{content:"";position:absolute;right:-140px;top:-140px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.08)}
.s1-hero::before{content:"";position:absolute;left:-100px;bottom:-160px;width:360px;height:360px;border-radius:50%;background:rgba(255,255,255,.06)}
.s1-hero h1{font-size:40px;line-height:1.35;max-width:760px;margin-bottom:20px;position:relative;z-index:1}
.s1-hero .sub{font-size:18px;max-width:720px;opacity:.92;position:relative;z-index:1}
.s1-hero .actions{margin-top:34px;position:relative;z-index:1}
.btn-main{display:inline-block;background:#fff;color:#1a5cff;font-weight:700;font-size:17px;padding:14px 38px;border-radius:32px;box-shadow:0 8px 24px rgba(0,20,80,.25)}
.btn-main:hover{transform:translateY(-2px);text-decoration:none}
.btn-ghost{display:inline-block;margin-left:14px;color:#fff;border:1.5px solid rgba(255,255,255,.7);padding:13px 32px;border-radius:32px;font-size:16px}
.btn-ghost:hover{background:rgba(255,255,255,.12);text-decoration:none}
/* 区块 */
.s1-sec{padding:72px 0}
.s1-sec.alt{background:#fff}
.s1-sec h2{font-size:30px;color:#0f2a6b;margin-bottom:26px;padding-left:16px;border-left:6px solid #1a5cff;line-height:1.4}
.s1-sec p{margin-bottom:16px;font-size:16px;color:#374151}
.s1-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:10px}
.s1-card{background:#fff;border:1px solid #e5e9f2;border-radius:14px;padding:22px 24px;font-size:15px;color:#374151;box-shadow:0 4px 14px rgba(20,50,120,.05)}
.s1-card::before{content:"";display:block;width:34px;height:4px;border-radius:2px;background:#1a5cff;margin-bottom:12px}
.s1-alt .s1-card{background:#f5f7fb}
table.s1-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(20,50,120,.06);font-size:15px;margin-top:8px}
.s1-table th{background:#1a5cff;color:#fff;padding:14px 18px;text-align:left;font-weight:600}
.s1-table td{padding:13px 18px;border-bottom:1px solid #edf0f7;color:#374151}
.s1-table tr:last-child td{border-bottom:none}
.s1-table tr:nth-child(even) td{background:#f8faff}
ol.s1-steps{counter-reset:st;list-style:none;margin-top:8px}
ol.s1-steps li{counter-increment:st;position:relative;padding:14px 0 14px 58px;font-size:16px;color:#374151;border-bottom:1px dashed #dbe2f0}
ol.s1-steps li::before{content:counter(st);position:absolute;left:0;top:12px;width:38px;height:38px;border-radius:50%;background:#1a5cff;color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:17px}
.s1-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px;margin-top:14px}
.s1-stat{background:linear-gradient(160deg,#1a5cff,#0f3aa8);color:#fff;border-radius:14px;padding:26px 20px;text-align:center}
.s1-stat b{display:block;font-size:30px;margin-bottom:6px}
.s1-stat span{font-size:14px;opacity:.85}
.s1-quotes{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.s1-quote{background:#fff;border-radius:14px;padding:24px;border:1px solid #e5e9f2;font-size:15px;color:#374151}
.s1-quote p{margin:0 0 12px}
.s1-quote cite{display:block;font-style:normal;color:#1a5cff;font-weight:600;font-size:14px}
.s1-faq .qa{background:#fff;border:1px solid #e5e9f2;border-radius:12px;padding:20px 24px;margin-bottom:14px}
.s1-faq h3{font-size:17px;color:#0f2a6b;margin-bottom:8px}
.s1-faq p{margin:0;font-size:15px}
.s1-ctaband{background:linear-gradient(120deg,#0f3aa8,#1a5cff);color:#fff;text-align:center;padding:56px 0}
.s1-ctaband p{font-size:18px;margin-bottom:22px}
/* 页脚 */
.s1-footer{background:#101b33;color:#93a1c0;padding:44px 0 30px;font-size:14px}
.s1-footer .cols{display:flex;flex-wrap:wrap;gap:36px;justify-content:space-between;margin-bottom:26px}
.s1-footer h4{color:#fff;font-size:16px;margin-bottom:12px}
.s1-footer a{color:#93a1c0;display:block;margin-bottom:8px}
.s1-footer a:hover{color:#fff}
.s1-footer .note{border-top:1px solid #22304f;padding-top:20px;line-height:1.9}
@media(max-width:760px){.s1-hero h1{font-size:28px}.s1-sec h2{font-size:23px}.s1-nav a{padding:6px 10px;font-size:14px}.brand{font-size:17px}}