:root{--bg:#f6f8fc;--card:#fff;--ink:#111827;--muted:#5f6b7a;--soft:#e8edf6;--line:#dce4f0;--brand:#155eef;--brand2:#0b2b6f;--accent:#00a3ff;--green:#0f9f6e;--shadow:0 22px 70px rgba(17,24,39,.10);--radius:26px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.72;text-rendering:optimizeLegibility}a{text-decoration:none;color:inherit}img{display:block;max-width:100%;height:auto}button{font:inherit}.container{width:min(1180px,calc(100% - 40px));margin:auto}
.topbar{position:sticky;top:0;z-index:900;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid rgba(220,228,240,.82)}.topbar-inner{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:.04em}.brand img{width:44px;height:44px}.brand em{display:block;color:var(--muted);font-size:12px;font-style:normal;font-weight:600;letter-spacing:0}.nav{display:flex;align-items:center;gap:18px}.nav a{font-size:14px;color:#273244;font-weight:700}.nav a.active,.nav a:hover{color:var(--brand)}.top-actions{display:flex;gap:10px}.btn{border:0;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 19px;font-weight:850;transition:.22s ease;white-space:nowrap}.btn:hover{transform:translateY(-1px)}.btn-blue{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;box-shadow:0 12px 30px rgba(21,94,239,.25)}.btn-dark{background:var(--brand2);color:#fff}.btn-white{background:#fff;color:var(--brand2);border:1px solid var(--line)}.menu-toggle{display:none;background:transparent;border:0;flex-direction:column;gap:5px;margin-left:auto}.menu-toggle span{width:24px;height:2px;background:var(--brand2)}
.breadcrumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:18px}.breadcrumb a{color:var(--brand)}.eyebrow{display:inline-flex;color:var(--brand);font-size:12px;letter-spacing:.18em;text-transform:uppercase;font-weight:900}
.hero-atlas{padding:64px 0 34px;background:radial-gradient(circle at 82% 10%,rgba(0,163,255,.18),transparent 28%),linear-gradient(180deg,#fff 0%,#f6f8fc 100%)}.atlas-grid{display:grid;grid-template-columns:1fr .95fr;gap:34px;align-items:center}.atlas-copy h1,.sub-hero h1,.section-copy h2,.section-head h2,.seo-layout h2{font-size:clamp(38px,5.5vw,72px);line-height:.98;letter-spacing:-.055em;margin:14px 0 16px;color:#0f172a}.atlas-copy p,.sub-hero p,.section-copy p,.section-head p,.seo-layout p,.river-card p,.process-grid p,.verify-steps p,.tutorial-grid p,.aftersale-grid p,.entry-grid p{color:var(--muted);margin:0}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.trust-row span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 12px;font-size:13px;color:var(--brand2);font-weight:750}.atlas-products{position:relative;min-height:540px}.product-focus{position:absolute;inset:0 70px 40px 20px;background:#fff;border:1px solid var(--line);border-radius:36px;box-shadow:var(--shadow);display:grid;place-items:center;padding:36px}.product-focus img{width:min(460px,100%);object-fit:contain}.mini-device{position:absolute;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:16px}.mini-device img{width:120px;aspect-ratio:1/1;object-fit:contain}.mini-device.d1{right:0;top:30px}.mini-device.d2{right:20px;bottom:90px}.mini-device.d3{left:0;bottom:0}
.quick-entry{padding:22px 0 62px}.quick-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.quick-grid a,.quick-grid button{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;text-align:left;box-shadow:var(--shadow);cursor:pointer}.quick-grid b{display:block;font-size:18px;color:#0f172a;margin-bottom:6px}.quick-grid span{display:block;color:var(--muted);font-size:13px}
.section{padding:74px 0}.service-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:34px;align-items:start}.sticky-copy{position:sticky;top:100px}.map-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}.map-list a{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}.map-list small{color:var(--brand);font-weight:900}.map-list strong{display:block;font-size:22px;margin:8px 0;color:#0f172a}.map-list p{margin:0;color:var(--muted)}
.section-head{max-width:820px;margin-bottom:26px}.product-river{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.river-card{background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);padding:18px;display:grid;grid-template-columns:180px 1fr;gap:18px;align-items:center}.river-card.primary-product{grid-column:span 2;grid-template-columns:330px 1fr}.river-card img{background:#f8fbff;border:1px solid var(--line);border-radius:22px;padding:12px;width:100%;aspect-ratio:1/1;object-fit:contain}.river-card span{color:var(--brand);font-size:12px;font-weight:900;letter-spacing:.12em}.river-card h3{font-size:28px;margin:8px 0;color:#0f172a}.river-card ul{display:flex;gap:8px;flex-wrap:wrap;list-style:none;margin:14px 0 0;padding:0}.river-card li{padding:7px 10px;border:1px solid var(--line);background:#f8fbff;border-radius:999px;font-size:13px}
.seo-block{background:#fff}.seo-layout{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.seo-layout article{border:1px solid var(--line);border-radius:28px;padding:24px;background:#fff;box-shadow:var(--shadow)}.seo-layout h2{font-size:30px}
.sub-hero{padding:64px 0;background:linear-gradient(180deg,#fff 0%,#f6f8fc 100%)}.sub-grid{display:grid;grid-template-columns:1fr .9fr;gap:34px;align-items:center}.sub-visual{background:#fff;border:1px solid var(--line);border-radius:34px;box-shadow:var(--shadow);padding:26px;display:grid;place-items:center}.sub-visual img{max-height:360px;object-fit:contain}.logo-visual img{max-height:220px}
.compare-table{background:#fff;border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow);overflow:hidden}.compare-row{display:grid;grid-template-columns:1fr 1.4fr 1.1fr 1fr 1.45fr .65fr;gap:14px;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line)}.compare-row:last-child{border-bottom:0}.compare-row.head{background:var(--brand2);color:#fff;font-weight:900}.mini{border:1px solid var(--line);background:#fff;color:var(--brand);border-radius:999px;padding:9px 12px;font-weight:900;cursor:pointer}
.process-grid,.tutorial-grid,.aftersale-grid,.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.process-grid article,.tutorial-grid article,.aftersale-grid article,.entry-grid article,.verify-steps article,.faq-list details{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:22px}.process-grid b,.tutorial-grid b{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:var(--brand2);color:#fff;margin-bottom:16px}.process-grid h2,.tutorial-grid h2,.aftersale-grid h2,.entry-grid h2{font-size:24px;line-height:1.1;margin:0 0 10px}.verify-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.verify-steps span,.entry-grid span{color:var(--brand);font-size:12px;font-weight:900;letter-spacing:.12em}.faq-list{display:grid;gap:12px}.faq-list summary{font-size:22px;font-weight:900;cursor:pointer;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list p{margin-top:10px;color:var(--muted)}
.site-footer{background:#0b2b6f;color:#fff;padding:34px 0 58px}.footer-grid{display:flex;justify-content:space-between;gap:26px}.footer-brand{display:flex;gap:14px;align-items:flex-start}.footer-brand img{border-radius:14px}.footer-brand strong{font-size:22px}.footer-brand p{max-width:620px;margin:8px 0 0;color:#d9e5ff}.footer-links{display:flex;flex-direction:column;gap:8px;align-items:flex-end}.footer-btn{border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.1);color:#fff;border-radius:999px;padding:10px 14px;font-weight:900;cursor:pointer}
.contact-modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;z-index:999}.contact-modal.open{display:flex}.modal-mask{position:absolute;inset:0;background:rgba(10,24,48,.58);backdrop-filter:blur(8px)}.modal-card{position:relative;z-index:2;background:#fff;border-radius:28px;padding:28px;width:min(430px,calc(100% - 28px));text-align:center;box-shadow:0 40px 100px rgba(0,0,0,.28)}.modal-close{position:absolute;right:16px;top:10px;border:0;background:transparent;font-size:30px;cursor:pointer}.modal-card h2{margin:0 0 6px}.modal-card p{margin:0 0 16px;color:var(--muted)}.qr-frame{border:1px solid var(--line);border-radius:22px;padding:10px}.qr-frame img{width:100%;border-radius:14px}.modal-links{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:16px}.modal-links a{padding:10px 14px;background:#f3f7ff;border-radius:999px;color:var(--brand2);font-weight:800}.float-service{position:fixed;right:18px;bottom:18px;z-index:100;border:0;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;border-radius:999px;padding:14px 18px;font-weight:900;box-shadow:0 15px 34px rgba(21,94,239,.26);cursor:pointer}.lock{overflow:hidden}
@media(max-width:1180px){.nav,.top-actions{display:none}.menu-toggle{display:flex}.atlas-grid,.service-layout,.sub-grid{grid-template-columns:1fr}.atlas-products{min-height:430px}.quick-grid,.seo-layout,.product-river,.process-grid,.tutorial-grid,.aftersale-grid,.entry-grid{grid-template-columns:repeat(2,1fr)}.river-card.primary-product,.river-card{grid-column:auto;grid-template-columns:1fr}.map-list,.verify-steps{grid-template-columns:repeat(2,1fr)}.compare-row{grid-template-columns:1fr 1fr}.compare-row.head{display:none}.footer-grid{flex-direction:column}.footer-links{align-items:flex-start}.sticky-copy{position:static}}
@media(max-width:760px){.container{width:min(100%,calc(100% - 24px))}.hero-atlas,.section,.sub-hero{padding:48px 0}.quick-grid,.seo-layout,.product-river,.process-grid,.tutorial-grid,.aftersale-grid,.entry-grid,.map-list,.verify-steps{grid-template-columns:1fr}.atlas-copy h1,.sub-hero h1,.section-copy h2,.section-head h2{font-size:38px}.atlas-products{min-height:auto}.product-focus,.mini-device{position:static;margin-top:12px}.product-focus{padding:22px}.mini-device img{width:100%}.compare-row{grid-template-columns:1fr}.footer-brand{flex-direction:column}}