:root{--ink:#1b2f33;--muted:#5d6b6f;--line:#d9e4e2;--brand:#0a7f83;--brand2:#135c68;--soft:#eef7f4;--paper:#fff;--accent:#d7973b}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fbfdfc;line-height:1.7}a{color:var(--brand2);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.96);backdrop-filter:saturate(150%) blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:24px;padding:12px clamp(18px,4vw,56px)}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);min-width:310px}.brand img{border-radius:6px;object-fit:contain}.brand strong{display:block;font-size:18px;line-height:1.2}.brand small{display:block;color:var(--muted);font-size:12px;line-height:1.25;margin-top:2px}.nav{display:flex;gap:2px;flex:1;justify-content:center}.mobile-nav{display:none}.nav a{padding:8px 10px;border-radius:6px;color:var(--ink);font-size:14px}.nav a[aria-current=page],.nav a:hover{background:var(--soft);text-decoration:none}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--brand);border-radius:6px;padding:10px 16px;color:var(--brand2);font-weight:700;background:#fff}.btn.primary{background:var(--brand);color:#fff}.breadcrumbs{max-width:1180px;margin:18px auto 0;padding:0 20px;color:var(--muted);font-size:13px;display:flex;gap:8px;flex-wrap:wrap}main section,.article-page{max-width:1180px;margin:0 auto;padding:54px 20px}.hero{max-width:none;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,48vw);gap:36px;align-items:center;padding:46px clamp(20px,5vw,70px) 58px;background:linear-gradient(90deg,#f7fbf9 0%,#edf7f4 100%)}.hero-copy{max-width:760px}.kicker{color:var(--brand);font-weight:800;letter-spacing:0;margin:0 0 8px}.hero h1,.page-hero h1,.article-page h1{font-size:clamp(34px,5vw,64px);line-height:1.08;margin:0 0 18px;letter-spacing:0}.lead{font-size:clamp(17px,2vw,21px);color:#34494d;max-width:820px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0}.hero-image{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:8px}.hero-video{background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px;box-shadow:0 14px 34px rgba(19,43,49,.08)}.hero-video h2{font-size:clamp(22px,3vw,32px);margin:0 0 8px;line-height:1.2}.hero-video p:not(.kicker){color:var(--muted);margin:0 0 14px}.hero-video video{width:100%;aspect-ratio:16/9;border-radius:8px;background:#0d2024}.metric-row{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:0}.metric-row div{border-top:3px solid var(--brand);background:#fff;padding:12px;border-radius:6px}.metric-row dt{font-size:24px;font-weight:900}.metric-row dd{margin:0;color:var(--muted);font-size:13px}.summary-band{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:20px;margin-top:32px}.section-head{max-width:760px;margin-bottom:22px}.section-head h2,section h2{font-size:clamp(24px,3vw,36px);line-height:1.18;margin:0 0 10px}.section-head p{color:var(--muted);margin:0}.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.strength-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:16px}.strength-grid article{background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px}.strength-grid strong{display:block;color:var(--brand);font-size:32px;line-height:1;font-weight:900}.strength-grid h3{margin:10px 0 8px;font-size:20px}.strength-grid p{color:var(--muted);margin:0}.service-mode-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.service-mode-grid article{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:18px;text-align:center}.service-mode-grid h3{margin:0 0 8px;color:var(--brand2)}.service-mode-grid p{margin:0;color:var(--muted);font-size:14px}.cert-section img{width:100%;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 12px 30px rgba(19,43,49,.08)}.home-cert-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:22px;align-items:center}.home-cert-layout img{width:100%;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 12px 30px rgba(19,43,49,.08)}.cert-points{background:#fff;border:1px solid var(--line);border-radius:8px;padding:22px}.cert-points h3{margin-top:0;font-size:22px}.cert-points .btn{margin-top:10px}.card,.article-card,.contact-grid article,.timeline article{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:20px}.card h3,.article-card h3{margin-top:0;font-size:20px}.card p,.article-card p{color:var(--muted)}.split{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}.split img,.image-grid img{border-radius:8px;object-fit:cover;width:100%;aspect-ratio:4/3}.check-list{padding-left:20px}.check-list li{margin:8px 0}.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}.tag-cloud span{background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:6px;padding:10px 12px}.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.timeline span{font-weight:900;color:var(--brand);font-size:22px}.cta{background:var(--brand2);color:#fff;border-radius:0;max-width:none;text-align:center}.cta p{color:#e7f7f4}.article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.case-strip,.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.case-grid{grid-template-columns:repeat(3,1fr)}.case-strip article,.case-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px}.case-card strong{display:block;color:var(--brand2);margin-top:12px}.more-link{margin-top:18px;font-weight:800}.video-band video,.inline-video video{width:100%;max-height:620px;border-radius:8px;background:#0d2024}.inline-video p{margin:8px 0 0;color:var(--muted);font-size:14px}.wechat-float{position:fixed;right:24px;bottom:72px;z-index:30}.wechat-card{width:210px;background:#fff;border:1px solid var(--line);box-shadow:0 16px 36px rgba(19,43,49,.18);border-radius:8px;padding:14px;text-align:center}.wechat-card strong{display:block;font-size:18px;color:var(--brand2)}.wechat-card p{font-size:13px;line-height:1.55;color:var(--muted);margin:8px 0}.wechat-card img{width:150px;height:auto;margin:8px auto;border-radius:6px}.wechat-card span{display:block;background:var(--soft);color:var(--brand2);font-weight:800;border-radius:6px;padding:7px}.wechat-mobile{display:none}.wechat-page{display:grid;grid-template-columns:1fr 360px;gap:42px;align-items:center}.wechat-qr-panel{background:#fff;border:1px solid var(--line);border-radius:8px;padding:22px;text-align:center;box-shadow:0 14px 34px rgba(19,43,49,.12)}.wechat-qr-panel img{width:100%;max-width:300px;margin:0 auto 14px;border-radius:6px}.wechat-qr-panel strong{font-size:22px;color:var(--brand2)}.wechat-qr-panel p{color:var(--muted)}.wechat-actions{display:flex;gap:12px;flex-wrap:wrap}.page-hero{padding-top:36px;padding-bottom:32px}.compare{overflow:auto}.compare table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line)}th,td{border-bottom:1px solid var(--line);padding:14px;text-align:left;vertical-align:top}th{background:var(--soft)}.image-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.image-grid figure{margin:0}.image-grid figcaption{font-size:14px;color:var(--muted);margin-top:8px}.faq-list{display:grid;gap:10px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:8px;padding:16px}.faq-list summary{cursor:pointer;font-weight:800}.article-page header{padding-bottom:24px}.meta{color:var(--muted);font-size:14px}.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}.sitemap-list{max-width:1180px;margin:0 auto 60px;padding:0 20px;list-style:none}.sitemap-list li{border-bottom:1px solid var(--line);padding:14px 0}.sitemap-list span{display:block;color:var(--muted);font-size:14px}.site-footer{background:#132b31;color:#eaf5f2;padding:36px clamp(20px,5vw,70px);display:grid;grid-template-columns:1.4fr .8fr;gap:30px}.site-footer a{color:#fff}.site-footer p{color:#c7d8d7}@media(max-width:980px){.site-header{align-items:flex-start;flex-wrap:wrap}.brand{order:1}.nav{display:none}.mobile-nav{display:flex;gap:8px;order:3;flex:0 0 100%;width:100%;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:8px 0;overflow-x:auto;scrollbar-color:#b8c1c0 #f4f7f6;scrollbar-width:auto}.mobile-nav a{display:flex;align-items:center;justify-content:center;white-space:nowrap;min-height:42px;padding:8px 14px;border-radius:6px;color:var(--ink);font-size:14px}.mobile-nav a[aria-current=page],.mobile-nav a:hover{background:var(--soft);color:var(--brand2);font-weight:800;text-decoration:none}.hero{grid-template-columns:1fr}.metric-row,.card-grid,.timeline,.article-list,.image-grid,.case-strip,.case-grid,.strength-grid{grid-template-columns:repeat(2,1fr)}.service-mode-grid{grid-template-columns:repeat(2,1fr)}.split,.contact-grid,.site-footer,.wechat-page,.home-cert-layout{grid-template-columns:1fr}.wechat-float{right:12px;bottom:82px}.wechat-card{display:none}.wechat-mobile{display:inline-flex;align-items:center;justify-content:center;width:58px;height:58px;border-radius:50%;background:var(--brand);color:#fff;font-weight:900;box-shadow:0 12px 28px rgba(19,43,49,.25);text-decoration:none}}@media(max-width:620px){.site-header{padding:12px 14px;gap:10px}.brand{min-width:0;width:100%;align-items:center}.brand img{width:78px;height:auto}.brand strong{font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.brand small{display:block;font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.brand span{min-width:0;flex:1}.mobile-nav a{min-height:40px}.nav{padding-top:2px}.nav a{white-space:nowrap}.hero{padding:30px 18px 42px;gap:22px}.hero h1,.page-hero h1,.article-page h1{font-size:30px}.metric-row,.card-grid,.timeline,.article-list,.image-grid,.case-strip,.case-grid,.strength-grid,.service-mode-grid{grid-template-columns:1fr}.section-head{margin-bottom:14px}.section-head h2,section h2{font-size:26px}.section-head p,.lead{font-size:16px;line-height:1.65}.card,.article-card,.contact-grid article,.timeline article,.case-strip article,.case-card,.strength-grid article,.service-mode-grid article{padding:14px}.card h3,.article-card h3{font-size:18px}.tag-cloud{gap:8px}.tag-cloud span{padding:8px 10px;font-size:14px;line-height:1.35}.timeline{gap:10px}.timeline span{font-size:18px}.timeline article h3{margin:4px 0}.timeline article p{font-size:14px;line-height:1.55;margin:0}.case-strip,.case-grid,.card-grid,.article-list{gap:10px}main section,.article-page{padding:26px 18px}.summary-band{margin-top:14px}.hero-actions .btn{width:100%}.site-footer{padding:30px 18px}.wechat-mobile{width:54px;height:54px;font-size:14px}.wechat-page{gap:24px}.wechat-actions .btn{width:100%}}