:root { --ink:#0F2A3F; --steel:#23445F; --signal:#E8632A; --signal-deep:#C84E1F; --road:#F3F6F8; --line:#D8E1E8; --muted:#5B7488; }
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif; color:var(--ink); line-height:1.75; background:#fff; -webkit-font-smoothing:antialiased; }
.container { max-width:1160px; margin:0 auto; padding:0 20px; }
a { text-decoration:none; color:inherit; }
.topbar { background:var(--ink); color:#dbe7f0; font-size:13px; padding:8px 0; }
.topbar .container { display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap; }
.topbar b { color:#FFB28A; }
header.sticky { position:sticky; top:0; z-index:50; background:rgba(255,255,255,.97); border-bottom:1px solid var(--line); }
.nav { display:flex; align-items:center; justify-content:space-between; padding:12px 0; gap:16px; }
.brand { display:flex; align-items:center; gap:10px; font-weight:800; font-size:19px; }
.brand .mark { width:32px; height:32px; border-radius:8px; background:var(--ink); color:#fff; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.brand small { display:block; font-size:11px; font-weight:500; color:var(--muted); }
nav.menu { display:none; }
nav.menu ul { list-style:none; display:flex; gap:22px; }
nav.menu a { color:var(--steel); font-size:15px; font-weight:500; }
nav.menu a:hover { color:var(--signal); }
.nav-cta { background:var(--signal); color:#fff; font-weight:700; padding:9px 16px; border-radius:6px; font-size:14px; display:inline-flex; align-items:center; gap:8px; }
.hero { color:#fff; background:linear-gradient(100deg,rgba(15,42,63,.95) 0%,rgba(15,42,63,.72) 55%,rgba(15,42,63,.45) 100%),url("https://smartindust.com/assets/hero.jpg") center/cover no-repeat; padding:70px 0 56px; }
.hero .kicker { display:inline-flex; background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.25); padding:6px 14px; border-radius:999px; font-size:13px; letter-spacing:1px; margin-bottom:20px; }
.hero h1 { font-size:clamp(26px,4.2vw,44px); font-weight:900; line-height:1.2; }
.hero .lead { font-size:clamp(15px,2vw,18px); max-width:680px; margin:16px 0 8px; color:#EAF1F6; }
.hero .chips { display:flex; flex-wrap:wrap; gap:10px; margin:20px 0 28px; }
.hero .chips span { border:1px solid rgba(255,255,255,.3); padding:6px 14px; border-radius:6px; font-size:14px; background:rgba(0,0,0,.12); }
.hero .actions { display:flex; flex-wrap:wrap; gap:14px; }
.btn { display:inline-flex; align-items:center; gap:8px; padding:14px 26px; border-radius:8px; font-weight:700; font-size:16px; }
.btn-primary { background:var(--signal); color:#fff; }
.btn-ghost { border:1px solid rgba(255,255,255,.5); color:#fff; }
.hero-stats { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:40px; }
.stat { background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.2); border-radius:10px; padding:15px 18px; }
.stat b { display:block; font-size:21px; font-weight:800; color:#fff; }
.stat b em { font-style:normal; color:#FFB28A; }
.stat small { color:#C9D9E6; font-size:13px; }
.hero .grid { display:grid; grid-template-columns:1fr; gap:28px; align-items:center; }
.route-card { background:rgba(255,255,255,.09); border:1px solid rgba(255,255,255,.22); border-radius:14px; padding:24px; }
.route-card h3 { font-size:15px; color:#C9D9E6; font-weight:600; margin-bottom:14px; letter-spacing:1px; }
.route-card dl { display:grid; grid-template-columns:1fr 1fr; gap:12px 16px; }
.route-card dt { font-size:12px; color:#9DB4C6; }
.route-card dd { font-size:16px; font-weight:800; color:#fff; }
.route-card dd em { font-style:normal; color:#FFB28A; }
section { padding:58px 0; }
.section-head { max-width:820px; margin-bottom:36px; }
.section-head .tag { color:var(--signal); font-weight:700; letter-spacing:2px; font-size:13px; display:block; margin-bottom:8px; }
.section-head h2 { font-size:clamp(23px,3.4vw,32px); font-weight:800; line-height:1.3; }
.section-head p { color:var(--muted); margin-top:12px; font-size:16px; }
.center .section-head { margin-left:auto; margin-right:auto; text-align:center; }
.alt { background:var(--road); }
.article-body p { color:#2c3b48; font-size:16px; margin-bottom:18px; }
.article-body p:last-child { margin-bottom:0; }
.price-table { width:100%; border-collapse:collapse; margin-top:8px; background:#fff; border:1px solid var(--line); border-radius:12px; overflow:hidden; table-layout:fixed; }
.price-table th, .price-table td { padding:14px 16px; text-align:left; font-size:15px; }
.price-table thead th { background:var(--ink); color:#fff; font-weight:600; }
.price-table tbody tr:nth-child(even) { background:#F8FAFC; }
.price-table tbody td { border-top:1px solid var(--line); color:#33424F; }
.price-cards { display:grid; grid-template-columns:1fr; gap:16px; }
.price-card { background:#fff; border:1px solid var(--line); border-top:4px solid var(--signal); border-radius:12px; padding:22px; }
.price-card h3 { font-size:16px; color:var(--steel); margin-bottom:6px; }
.price-card .amt { font-size:21px; font-weight:900; color:var(--ink); }
.price-card .amt em { font-style:normal; color:var(--signal); }
.price-card p { color:var(--muted); font-size:14px; margin-top:8px; }
.fee-grid { display:grid; grid-template-columns:1fr; gap:14px; }
.fee-row { display:flex; justify-content:space-between; align-items:center; gap:14px; background:#fff; border:1px solid var(--line); border-radius:10px; padding:16px 20px; }
.fee-row .k { font-weight:700; font-size:15px; color:var(--ink); }
.fee-row .k small { display:block; font-weight:400; color:var(--muted); font-size:13px; }
.fee-row .v { color:var(--signal); font-weight:800; font-size:17px; }
.cover-grid { display:grid; grid-template-columns:1fr; gap:16px; }
.cover-card { background:#fff; border:1px solid var(--line); border-radius:12px; padding:24px; }
.cover-card h3 { display:flex; align-items:center; gap:10px; font-size:18px; margin-bottom:10px; }
.cover-card ul { list-style:none; display:flex; flex-wrap:wrap; gap:8px; }
.cover-card li { background:var(--road); border:1px solid var(--line); border-radius:999px; padding:5px 14px; font-size:14px; color:#33424F; }
.cover-card p { color:var(--muted); font-size:14px; margin-top:12px; }
.guar-grid { display:grid; grid-template-columns:1fr; gap:16px; }
.guar-card { background:#fff; border:1px solid var(--line); border-radius:12px; padding:22px; }
.guar-card h3 { font-size:17px; margin:10px 0 8px; }
.guar-card p { color:var(--muted); font-size:15px; }
.svc-grid { display:grid; grid-template-columns:1fr; gap:16px; }
.svc-card { background:#fff; border:1px solid var(--line); border-radius:12px; padding:22px; }
.svc-card h3 { font-size:18px; margin-bottom:8px; }
.svc-card p { color:var(--muted); font-size:15px; }
.hl-grid { display:grid; grid-template-columns:1fr; gap:16px; }
.hl-card { background:#fff; border:1px solid var(--line); border-radius:14px; padding:26px; }
.hl-card .ic { width:44px; height:44px; border-radius:12px; background:var(--road); display:flex; align-items:center; justify-content:center; margin-bottom:14px; }
.hl-card h3 { font-size:19px; margin-bottom:8px; }
.hl-card p { color:var(--muted); font-size:15px; }
.hl-card b { color:var(--signal); }
.angle-grid { display:grid; grid-template-columns:1fr; gap:16px; }
.angle-card { border:1px solid var(--line); border-left:4px solid var(--signal); background:#fff; border-radius:10px; padding:22px 24px; }
.angle-card .num { font-size:12px; font-weight:800; letter-spacing:2px; color:var(--signal); }
.angle-card h3 { font-size:18px; margin:6px 0 10px; }
.angle-card ul { list-style:none; display:grid; gap:8px; }
.angle-card li { position:relative; padding-left:20px; color:#33424F; font-size:15px; }
.angle-card li::before { content:""; position:absolute; left:2px; top:9px; width:8px; height:8px; border-radius:50%; background:var(--signal); }
.steps { display:grid; grid-template-columns:1fr; gap:12px; }
.step { display:flex; gap:16px; background:#fff; border:1px solid var(--line); border-radius:10px; padding:18px 20px; }
.step .dot { width:40px; height:40px; border-radius:50%; background:var(--ink); color:#fff; font-weight:800; display:flex; align-items:center; justify-content:center; font-size:16px; flex-shrink:0; }
.step h3 { font-size:17px; margin-bottom:4px; }
.step p { color:var(--muted); font-size:15px; }
.file-list { display:grid; grid-template-columns:1fr; gap:14px; }
.file-row { display:flex; gap:14px; background:#fff; border:1px solid var(--line); border-radius:10px; padding:16px 20px; align-items:flex-start; }
.file-row .k { font-size:13px; color:var(--signal); font-weight:800; letter-spacing:1px; width:80px; flex-shrink:0; padding-top:2px; }
.file-row .v { color:#33424F; font-size:15px; }
.value-grid { display:grid; grid-template-columns:1fr; gap:16px; }
.value-card { background:#fff; border:1px solid var(--line); border-radius:12px; padding:24px; }
.value-card .num { font-size:12px; font-weight:800; letter-spacing:2px; color:var(--signal); }
.value-card h3 { font-size:18px; margin:8px 0 10px; }
.value-card p { color:var(--muted); font-size:15px; }
.biz { background:linear-gradient(120deg,var(--ink),var(--steel)); color:#fff; border-radius:14px; padding:32px; }
.biz h3 { font-size:22px; margin-bottom:8px; }
.biz > p { color:#C9D9E6; max-width:680px; margin-bottom:20px; }
.biz-grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.biz-item { background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.18); border-radius:10px; padding:14px; }
.biz-item b { display:block; margin-bottom:4px; }
.biz-item span { font-size:13px; color:#C9D9E6; }
.fragile { background:linear-gradient(120deg,var(--ink),var(--steel)); color:#fff; border-radius:14px; padding:32px; }
.fragile h3 { font-size:22px; margin-bottom:10px; }
.fragile > p { color:#C9D9E6; max-width:720px; margin-bottom:22px; }
.frag-grid { display:grid; grid-template-columns:1fr; gap:12px; }
.frag-item { background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.18); border-radius:10px; padding:16px; }
.frag-item b { display:block; font-size:15px; margin-bottom:6px; }
.frag-item span { font-size:13px; color:#C9D9E6; }
.faq-wrap { max-width:860px; margin:0 auto; }
.faq-item { border:1px solid var(--line); border-radius:10px; margin-bottom:12px; background:#fff; overflow:hidden; }
.faq-q { display:flex; justify-content:space-between; align-items:center; gap:12px; padding:16px 20px; font-weight:600; font-size:15px; cursor:pointer; background:none; border:none; width:100%; text-align:left; color:var(--ink); }
.faq-q .ic { flex-shrink:0; width:24px; height:24px; border-radius:50%; border:1.5px solid var(--signal); color:var(--signal); display:flex; align-items:center; justify-content:center; font-size:16px; font-weight:700; transition:transform .25s; }
.faq-item.open .faq-q .ic { transform:rotate(45deg); }
.faq-a { max-height:0; overflow:hidden; transition:max-height .3s ease; }
.faq-a p { padding:0 20px 18px; color:var(--muted); font-size:15px; }
.contact { background:var(--ink); color:#fff; }
.contact .section-head h2 { color:#fff; }
.contact .section-head p { color:#C9D9E6; }
.contact-grid { display:grid; grid-template-columns:1fr; gap:16px; max-width:760px; margin:0 auto; }
.contact-card { background:#fff; color:var(--ink); border-radius:14px; padding:26px; }
.contact-card h4 { font-size:13px; color:var(--muted); font-weight:500; }
.contact-card p { font-size:22px; font-weight:800; margin-top:4px; }
.contact-card p.small { font-size:14px; font-weight:500; color:#33424F; margin-top:0; }
.contact-actions { display:flex; flex-wrap:wrap; gap:12px; max-width:760px; margin:22px auto 0; }
.contact-actions .btn { flex:1; min-width:230px; justify-content:center; }
.fixed-call { position:fixed; left:0; right:0; bottom:0; z-index:60; background:var(--signal); padding:12px 16px; text-align:center; }
.fixed-call a { color:#fff; font-size:18px; font-weight:800; display:inline-flex; align-items:center; gap:10px; }
footer { background:#0B2133; color:#B7C7D4; padding:36px 0 80px; }
.footer-inner { display:grid; gap:10px; font-size:13px; color:#8FA5B6; }
.footer-inner a { color:#C9D9E6; }
@media (min-width:640px){ .hero-stats{grid-template-columns:repeat(3,1fr);} .svc-grid{grid-template-columns:repeat(2,1fr);} .cover-grid{grid-template-columns:1fr 1fr;} .guar-grid{grid-template-columns:repeat(2,1fr);} .price-cards{grid-template-columns:repeat(3,1fr);} .hl-grid{grid-template-columns:repeat(3,1fr);} .contact-grid{grid-template-columns:1fr 1fr;} nav.menu{display:block;} .route-card dl{grid-template-columns:1fr 1fr 1fr;} }
@media (min-width:900px){ .angle-grid{grid-template-columns:repeat(2,1fr);} .guar-grid{grid-template-columns:repeat(4,1fr);} .hero .grid{grid-template-columns:1.1fr .9fr;} .value-grid{grid-template-columns:repeat(3,1fr);} .biz-grid{grid-template-columns:repeat(4,1fr);} .frag-grid{grid-template-columns:repeat(4,1fr);} .fee-grid{grid-template-columns:repeat(2,1fr);} }
.related-sec{background:var(--ink,#0F2A3F);color:#fff;padding:46px 0;margin-top:0}
.related-sec .rc{max-width:1160px;margin:0 auto;padding:0 20px}
.related-sec h2{font-size:22px;font-weight:800;margin-bottom:6px;color:#fff}
.related-sec .sub{color:#B9C9D6;font-size:13px;margin-bottom:22px}
.related-links{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;padding:0}
.related-links li{margin:0}
.related-links li a{display:block;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);padding:11px 14px;border-radius:8px;font-size:14px;color:#EAF1F6;line-height:1.4}
.related-links li a:hover{border-color:var(--signal,#E8632A);color:#FFB28A}
.wxkf-fab{position:fixed;left:16px;top:50%;transform:translateY(-50%);z-index:999;width:94px;background:#fff;border:2px solid var(--signal,#E8632A);border-radius:12px;padding:8px;box-shadow:0 8px 24px rgba(15,42,63,.22);text-align:center;display:none}
.wxkf-fab img{width:100%;border-radius:6px;display:block;border:0}
.wxkf-fab .t{font-size:12px;color:var(--ink,#0F2A3F);font-weight:700;margin-top:6px;line-height:1.3}
@media (min-width:768px){.wxkf-fab{display:block}}
@media (max-width:767px){.wxkf-fab{display:none}}