:root{--a:#2c6b52;--pale:#e8f1ec;--ink:#232a27;--mut:#6d7772;--line:#dde5e0}
*{box-sizing:border-box}
body{margin:0;background:#fff;color:var(--ink);font:15px/1.9 "Songti SC","SimSun","Microsoft YaHei",serif}
a{color:inherit;text-decoration:none}ul{margin:0;padding:0;list-style:none}button{font:inherit;cursor:pointer}
.s4-head{border-bottom:1px solid var(--line);background:#fff}
.s4-headin{max-width:1100px;margin:auto;height:82px;display:flex;align-items:center;justify-content:space-between}
.s4-logo{display:flex;align-items:center;color:var(--a)}
.s4-logo .s4-lg{font-size:24px;font-weight:700;letter-spacing:3px;padding-bottom:5px;border-bottom:1px solid var(--a)}
.s4-nav{display:flex;gap:30px}.s4-nav a{font-size:15px;color:#4d5b54;padding:8px 0;border-bottom:2px solid transparent}
.s4-nav a:first-child,.s4-nav a:hover{color:var(--a);border-bottom-color:var(--a)}
.s4-wrap{max-width:1100px;margin:auto}
.s4-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center;padding:76px 0 70px;border-bottom:1px solid var(--line)}
.s4-kicker{display:inline-block;border-left:4px solid var(--a);padding-left:12px;color:var(--a);font-size:14px;letter-spacing:3px}
.s4-hero h1{font-size:44px;line-height:1.35;margin:22px 0 16px;letter-spacing:1px}
.s4-hero .sub{font-size:19px;color:var(--a);margin:0 0 18px}
.s4-hero .lead{color:var(--mut);font-size:15px;max-width:500px;margin:0 0 30px}
.s4-actions{display:flex;gap:14px;align-items:center}
.s4-actions a{border:1px solid var(--a);color:var(--a);padding:11px 28px;font-size:15px}
.s4-actions a:first-child{background:var(--a);color:#fff}
.s4-qr{margin-left:16px;text-align:center;font-size:12px;color:var(--mut)}
.s4-qrbox{width:76px;height:76px;border:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr);gap:2px;padding:7px;margin-bottom:5px}
.s4-qrbox i{background:var(--a)}.s4-qrbox i:nth-child(3n){background:#fff}
.s4-art{background:var(--pale);padding:36px;position:relative}
.s4-art:before{content:"";position:absolute;inset:16px;border:1px solid #c5d9cd}
.s4-art svg{width:100%;height:auto;display:block;position:relative}
.s4-sec{padding:64px 0;border-bottom:1px solid var(--line)}
.s4-title{font-size:29px;margin:0 0 8px;letter-spacing:1px}.s4-title:after{content:"";display:block;width:46px;height:3px;background:var(--a);margin-top:14px}
.s4-intro{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;margin-top:34px}
.s4-intro p{color:#4e5a54;font-size:15px;margin:0 0 14px}
.s4-intro .side{background:#f7faf8;border-left:3px solid var(--a);padding:24px 26px;color:#4e5a54;font-size:14px;height:fit-content}
.s4-adv{display:grid;grid-template-columns:1fr 1fr;gap:0 54px;margin-top:30px}
.s4-adv div{display:flex;gap:17px;padding:19px 0;border-bottom:1px dashed var(--line)}
.s4-adv .no{font-size:26px;color:#c6d8ce;font-weight:700;line-height:1.2;min-width:44px}
.s4-adv h3{margin:0 0 5px;font-size:17px}.s4-adv p{margin:0;color:var(--mut);font-size:13px}
.s4-contact{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:30px}
.s4-contact .card{background:var(--pale);padding:30px 32px}
.s4-contact h3{margin:0 0 12px;font-size:19px}.s4-contact p{margin:0;color:#4e5a54;font-size:14px}
.s4-faq{margin-top:26px}
.s4-faq .qa{display:flex;gap:20px;padding:21px 0;border-bottom:1px solid var(--line)}
.s4-faq .qn{font-size:22px;color:#b9cdc2;min-width:40px}
.s4-faq h3{margin:0 0 8px;font-size:17px}.s4-faq p{margin:0;color:var(--mut);font-size:14px}
.ft{background:var(--a);color:#d8e7de}
.fw{max-width:1100px;margin:auto;display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;padding:44px 0 28px}
.fname{display:inline-block;font-size:20px;font-weight:700;color:#fff;vertical-align:middle}
.fbrand p{font-size:13px;line-height:1.9;margin:12px 0 0;color:#c6ddd0}
.fcol h4{color:#fff;font-size:15px;margin:0 0 12px}.fcol li{font-size:13px;line-height:2.1;color:#c6ddd0}
.fb{border-top:1px solid rgba(255,255,255,.22);text-align:center;padding:16px;font-size:12px;color:#b7d2c2}.fb a{color:#fff}
@media(max-width:900px){.s4-nav{display:none}.s4-hero,.s4-intro,.s4-adv,.s4-contact,.fw{grid-template-columns:1fr}.s4-hero{padding:40px 0}.s4-hero h1{font-size:31px}.s4-sec{padding:42px 0}}

@media(max-width:640px){
.s4-headin{padding:12px 14px}
}