:root{--brand: #185fa5;--brand-dark: #0c447c;--accent: #d85a30;--ink: #1f2933;--ink-soft: #52606d;--line: #e4e7eb;--bg-soft: #f5f7fa;--radius: 12px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Microsoft YaHei,PingFang SC,Noto Sans SC,system-ui,sans-serif;color:var(--ink);line-height:1.7;background:#fff}.container{max-width:1080px;margin:0 auto;padding:0 20px}h1,h2,h3{line-height:1.35;margin:0 0 12px}h2{font-size:26px}h3{font-size:18px}p{margin:0 0 12px}a{color:var(--brand);text-decoration:none}a:hover{color:var(--brand-dark)}.section{padding:64px 0}.section.alt{background:var(--bg-soft)}.section-head{max-width:640px;margin:0 auto 36px;text-align:center}.section-head p{color:var(--ink-soft)}.btn{display:inline-block;padding:10px 24px;border-radius:8px;font-size:15px;border:1px solid transparent;cursor:pointer;transition:background-color .15s,color .15s}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark);color:#fff}.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}.btn-sm{padding:6px 16px;font-size:14px}.badge{display:inline-block;padding:4px 14px;border-radius:999px;background:#e6f1fb;color:var(--brand-dark);font-size:13px;margin-bottom:16px}.site-header{position:sticky;top:0;z-index:10;background:#fffffff0;border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;gap:28px;height:62px}.brand{font-size:19px;font-weight:600;color:var(--ink)}.brand span{color:var(--brand)}.site-header nav{display:flex;gap:22px;margin-left:auto}.site-header nav a{color:var(--ink-soft);font-size:15px}.site-header nav a:hover{color:var(--brand)}.hero{padding:80px 0 64px;background:linear-gradient(180deg,#f5f9ff,#fff)}.hero-inner{max-width:720px;margin:0 auto;text-align:center}.hero h1{font-size:40px;margin-bottom:16px}.hero h1 .hl{color:var(--brand)}.hero .desc{font-size:17px;color:var(--ink-soft);max-width:560px;margin:0 auto 28px}.hero-actions{display:flex;gap:14px;justify-content:center}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center}.stat .num{font-size:34px;font-weight:600;color:var(--brand)}.stat .num small{font-size:16px;font-weight:500;margin-left:2px}.stat .label{color:var(--ink-soft);font-size:14px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:border-color .15s,transform .15s;color:inherit;display:block}.card:hover{border-color:var(--brand);transform:translateY(-2px)}.card .icon{width:44px;height:44px;border-radius:10px;background:#e6f1fb;display:flex;align-items:center;justify-content:center;margin-bottom:14px}.card .icon svg{width:22px;height:22px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.card p{color:var(--ink-soft);font-size:14px;margin:0}.card .more{display:inline-block;margin-top:12px;font-size:14px;color:var(--brand)}.why-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;counter-reset:why}.why-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}.why-item .no{font-size:13px;color:var(--accent);font-weight:600;margin-bottom:8px}.why-item p{color:var(--ink-soft);font-size:14px;margin:0}.case-card{overflow:hidden;padding:0}.case-card .pic{height:150px;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;color:#b4b2a9;font-size:13px}.case-card img{width:100%;height:150px;object-fit:cover;display:block}.case-card .body{padding:18px 20px}.case-meta{font-size:13px;color:var(--ink-soft);margin-bottom:6px}.case-meta .tag{color:var(--brand);margin-right:10px}.case-card .summary{font-size:14px;color:var(--ink-soft);margin:0}.contact-wrap{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;align-items:start}.contact-info li{list-style:none;margin-bottom:14px;color:var(--ink-soft)}.contact-info li strong{color:var(--ink);font-weight:500;margin-right:8px}.contact-info{padding:0;margin:0}.wechat-qr{display:block;margin-top:8px;border:1px solid var(--line);border-radius:8px;background:#fff}.lead-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}.lead-form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}.lead-form input,.lead-form textarea{width:100%;padding:10px 14px;border:1px solid var(--line);border-radius:8px;font-size:15px;font-family:inherit;color:var(--ink)}.lead-form input:focus,.lead-form textarea:focus{outline:none;border-color:var(--brand)}.lead-form textarea{min-height:110px;resize:vertical}.form-msg{margin-top:12px;font-size:14px;display:none}.form-msg.ok{display:block;color:#1d7a3e}.form-msg.err{display:block;color:#c0392b}.page{padding:48px 20px 72px}.backlink{font-size:14px;color:var(--ink-soft);display:inline-block;margin-bottom:20px}.points{padding-left:0;list-style:none;margin:20px 0}.points li{padding:8px 0 8px 28px;position:relative;border-bottom:1px dashed var(--line)}.points li:before{content:"";position:absolute;left:6px;top:16px;width:8px;height:8px;border-radius:2px;background:var(--brand)}.detail-block{margin-top:36px}.feature-grid{list-style:none;padding:0;margin:16px 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px}.feature-grid li{position:relative;padding:12px 16px 12px 42px;background:var(--bg-soft);border-radius:10px;font-size:14px}.feature-grid li:before{content:"";position:absolute;left:18px;top:18px;width:12px;height:7px;border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(-45deg)}.spec-group{margin-top:18px}.spec-group h4{font-size:14px;font-weight:500;color:var(--ink-soft);margin:0 0 8px}.spec-table{width:100%;border-collapse:collapse;font-size:14px}.spec-table th{text-align:left;font-weight:400;color:var(--ink-soft);padding:10px 12px;background:var(--bg-soft);width:180px;border-bottom:1px solid var(--line)}.spec-table td{padding:10px 12px;border-bottom:1px solid var(--line)}.file-list{list-style:none;padding:0;margin:16px 0 0}.file-list li{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 16px;border:1px solid var(--line);border-radius:10px;margin-bottom:10px}.file-list strong{display:block;font-weight:500;font-size:14px}.file-meta{font-size:12px;color:var(--ink-soft)}.page-hero{padding:40px 0 4px;text-align:center}.page-hero h1{font-size:34px;margin-bottom:14px}.page-hero-desc{max-width:640px;margin:0 auto;font-size:17px;color:var(--ink-soft)}.page-blocks{margin-top:28px}.blk-heading{margin-top:40px}.blk-para p{margin-bottom:14px}.blk-figure{margin:26px 0}.blk-figure img{width:100%;border-radius:12px;display:block}.blk-figure figcaption{margin-top:8px;font-size:13px;color:var(--ink-soft);text-align:center}.blk-quote{margin:26px 0;padding:20px 24px;border-left:3px solid var(--brand);background:var(--bg-soft);border-radius:0 10px 10px 0}.blk-quote p{margin:0;font-size:16px}.blk-quote cite{display:block;margin-top:10px;font-size:13px;color:var(--ink-soft);font-style:normal}.blk-cards,.blk-faq{margin:26px 0}.blk-faq details{border-bottom:1px solid var(--line);padding:14px 0}.blk-faq summary{cursor:pointer;font-weight:500;font-size:15px}.blk-faq details p{margin:10px 0 0;color:var(--ink-soft);font-size:14px}.blk-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin:28px 0}.blk-stat{background:var(--bg-soft);border-radius:12px;padding:18px;text-align:center}.blk-stat .num{display:block;font-size:30px;font-weight:500;color:var(--brand)}.blk-stat .num em{font-size:15px;font-style:normal;margin-left:2px}.blk-stat .lab{display:block;margin-top:6px;font-size:13px;color:var(--ink-soft)}.video-block{margin:28px 0}.video-frame{position:relative;padding-bottom:56.25%;background:#10161d;border-radius:12px;overflow:hidden}.video-frame img,.video-frame iframe,.video-frame .video-placeholder{position:absolute;inset:0;width:100%;height:100%;border:0;object-fit:cover;display:block}.video-placeholder{background:#1f2933}.video-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:72px;height:72px;border-radius:50%;border:0;background:#0c447ceb;cursor:pointer;transition:background-color .15s}.video-play:hover{background:var(--brand)}.video-play:after{content:"";position:absolute;left:50%;top:50%;transform:translate(-40%,-50%);border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent}.video-block figcaption{margin-top:8px;font-size:13px;color:var(--ink-soft);text-align:center}.cta-box{margin-top:28px;padding:24px;background:#f5f9ff;border:1px solid #d5e5f7;border-radius:var(--radius);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.cta-box p{margin:0;font-weight:500}.site-footer{background:#1f2933;color:#c9d1d9;padding:36px 0;margin-top:64px}.footer-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;font-size:14px}.footer-inner a{color:#c9d1d9}.footer-inner a:hover{color:#fff}.footer-nav{display:flex;gap:18px}@media(max-width:760px){.hero h1{font-size:30px}.site-header nav{display:none}.contact-wrap,.stats{grid-template-columns:1fr}}