:root { --ink:#16243b; --body:#5c6a7e; --blue:#1265ee; --blue-hover:#0952ce; --white:#fff; --mist:#f3f7fc; --line:#e3e9f1; --radius:20px; --header-height:80px; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-padding-top:calc(var(--header-height) + 24px); }
body { margin:0; color:var(--ink); background:var(--white); font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif; -webkit-font-smoothing:antialiased; line-height:1.65; }
button,a { -webkit-tap-highlight-color:transparent; touch-action:manipulation; }
button { font:inherit; cursor:pointer; }
a { color:inherit; text-decoration:none; }
button,summary { -webkit-user-select:none; user-select:none; }
button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible { outline:3px solid var(--blue); outline-offset:5px; border-radius:4px; }
[hidden] { display:none !important; }
img { display:block; max-width:100%; height:auto; object-fit:contain; }
figure,p,h1,h2,h3 { margin:0; }
h1,h2,h3 { line-height:1.3; }
h2 { font-size:40px; font-weight:600; letter-spacing:-.04em; }
h3 { font-weight:600; }
.container { width:min(1240px,calc(100% - 96px)); margin-inline:auto; }
.icon-definitions { width:0; height:0; position:absolute; overflow:hidden; }
.icon { width:24px; height:24px; flex:0 0 auto; stroke:currentColor; stroke-width:1.65; stroke-linecap:round; stroke-linejoin:round; fill:none; }
.skip-link { position:fixed; z-index:50; top:8px; left:8px; padding:12px 20px; color:var(--white); background:var(--ink); transform:translateY(-160%); }
.skip-link:focus { transform:none; }
.header { position:sticky; top:0; z-index:20; background:var(--white); border-bottom:1px solid #edf1f6; }
.nav { height:var(--header-height); display:flex; align-items:center; gap:56px; }
.brand { display:inline-flex; align-items:center; gap:8px; white-space:nowrap; }
.brand img { width:44px; height:44px; }
.brand span { font-size:28px; line-height:1; letter-spacing:-.035em; font-weight:700; }
.desktop-nav { display:flex; gap:32px; margin-left:16px; }
.desktop-nav a { font-size:15px; padding-block:12px; transition:color .18s; }
.desktop-nav a:hover { color:var(--blue); }
.nav-actions { display:flex; align-items:center; gap:16px; margin-left:auto; }
.button { display:inline-flex; justify-content:center; align-items:center; gap:24px; min-height:54px; padding:14px 28px; color:var(--white); background:var(--blue); border:0; border-radius:8px; font-size:16px; font-weight:500; transition:background .18s; }
.button:hover { background:var(--blue-hover); }
.button:active { background:#0645b0; }
.button-small { min-height:42px; padding:10px 24px; font-size:14px; }
.menu-button { display:none; width:44px; height:44px; border:0; background:transparent; color:var(--ink); align-items:center; justify-content:center; }
.mobile-nav { padding:12px 24px 20px; border-top:1px solid var(--line); }
.mobile-nav a { display:block; padding:12px; }
.quiet-link { display:inline-flex; align-items:center; gap:12px; min-height:44px; font-size:15px; font-weight:500; transition:color .18s; }
.quiet-link:hover { color:var(--blue); }
.quiet-link .icon { width:20px; height:20px; }
.hero { background:linear-gradient(112deg,#f7f9fc 0%,#f3f7fc 58%,#eef5ff 100%); overflow:clip; }
.hero-stage { min-height:528px; display:grid; grid-template-columns:44% 56%; align-items:center; position:relative; }
.hero-copy { position:relative; z-index:1; padding-block:48px 12px; }
.hero-context { font-size:15px; color:var(--body); margin-bottom:22px; }
h1 { font-size:clamp(42px,4.4vw,62px); font-weight:650; letter-spacing:-.065em; line-height:1.25; }
.hero-description { color:var(--body); font-size:17px; line-height:1.85; max-width:390px; margin-top:24px; }
.hero-actions { display:flex; align-items:center; gap:28px; margin-top:30px; }
.hero-benefits { display:flex; flex-wrap:wrap; gap:24px; list-style:none; padding:0; margin:24px 0 0; color:var(--body); font-size:13px; }
.hero-benefits li { display:flex; align-items:center; gap:8px; }
.hero-benefits li::before { content:""; width:5px; height:5px; border-radius:50%; background:var(--blue); }
.hero-art { width:104%; margin-left:-1%; position:relative; padding-top:8px; }
.hero-art img { width:100%; aspect-ratio:1.4; }
figcaption { color:#65758a; font-size:11px; letter-spacing:.01em; text-align:right; }
.hero-art figcaption { position:absolute; right:8%; bottom:1%; }
.hero-controls { display:flex; gap:18px; align-items:center; padding-bottom:28px; }
.scene-tabs { display:flex; gap:30px; }
.scene-tabs button { position:relative; min-height:44px; border:0; padding:8px 0; font-size:14px; color:var(--body); background:transparent; }
.scene-tabs button::after { content:""; position:absolute; height:2px; inset:auto 0 0; background:transparent; }
.scene-tabs button[aria-selected="true"] { color:var(--blue); font-weight:600; }
.scene-tabs button[aria-selected="true"]::after { background:var(--blue); }
.icon-button { display:flex; align-items:center; justify-content:center; width:44px; height:44px; border:1px solid #cbd7e6; border-radius:50%; background:transparent; color:var(--body); }
.icon-button:hover { color:var(--blue); background:#fff8; }
.icon-button .icon { width:16px; height:16px; }
.carousel-position { font-size:12px; color:var(--body); margin-left:auto; font-variant-numeric:tabular-nums; }
.carousel-position #scene-position { color:var(--ink); }
.product-rail { display:grid; grid-template-columns:repeat(4,1fr); padding:32px 0; border-bottom:1px solid var(--line); }
.product-rail a { display:flex; align-items:center; gap:14px; padding:4px 24px; border-left:1px solid var(--line); }
.product-rail a:first-child { border-left:0; padding-left:0; }
.product-rail a:last-child { padding-right:0; }
.product-rail a > .icon:first-child { width:28px; height:28px; color:var(--blue); }
.product-rail strong { display:block; font-size:16px; font-weight:600; }
.product-rail span { display:block; color:var(--body); font-size:12px; margin-top:4px; }
.rail-arrow { width:16px; height:16px; margin-left:auto; color:var(--body); }
.product-rail a:hover strong { color:var(--blue); }
.service-metrics { display:grid; grid-template-columns:repeat(3,1fr); padding-block:40px 44px; text-align:center; }
.service-metrics strong { font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif; font-size:44px; line-height:1.2; font-weight:600; letter-spacing:-.045em; }
.service-metrics strong span { font-size:26px; margin-left:2px; }
.service-metrics .metric-words { font-size:30px; line-height:1.76; letter-spacing:-.045em; }
.service-metrics p { margin-top:12px; font-size:13px; color:var(--body); }
.unit { font-size:11px; }
.section { padding-block:88px; }
.section-heading { text-align:center; margin-bottom:44px; }
.section-heading p { margin-top:18px; color:var(--body); font-size:16px; }
.technology { border-top:1px solid var(--line); }
.technology-tabs { display:grid; grid-template-columns:repeat(4,1fr); max-width:840px; margin:0 auto 28px; border-bottom:1px solid var(--line); }
.technology-tabs button { display:flex; align-items:center; justify-content:center; gap:12px; background:transparent; border:0; border-bottom:3px solid transparent; margin-bottom:-1px; padding:16px 8px; font-size:16px; color:var(--body); }
.technology-tabs button[aria-selected="true"] { color:var(--blue); border-bottom-color:var(--blue); font-weight:600; }
.technology-tabs button:hover { color:var(--blue); }
.tech-panel { display:grid; grid-template-columns:40% 60%; align-items:center; min-height:480px; background:var(--mist); border-radius:var(--radius); overflow:hidden; }
.tech-copy { padding:48px 8px 48px 56px; }
.tech-copy h3 { font-size:32px; line-height:1.4; letter-spacing:-.045em; }
.tech-copy > p { margin-top:20px; font-size:15px; line-height:1.9; color:var(--body); max-width:325px; }
.check-list { display:flex; flex-direction:column; gap:12px; padding:0; margin:24px 0; list-style:none; font-size:14px; }
.check-list li { display:flex; align-items:baseline; gap:10px; }
.check-list li::before { content:""; width:9px; height:5px; border-left:2px solid var(--blue); border-bottom:2px solid var(--blue); transform:rotate(-45deg) translateY(-3px); flex:0 0 auto; }
.tech-copy .quiet-link { color:var(--blue); }
.tech-art { width:100%; padding:16px 24px 24px 0; }
.tech-art img { width:100%; }
.tech-art figcaption { margin-top:-22px; padding-right:16px; }
.devices-section { background:#f7f9fc; padding-block:56px; }
.devices-layout { display:grid; grid-template-columns:minmax(0,56fr) minmax(0,44fr); align-items:center; gap:8px; }
.devices-art { width:104%; margin-left:-4%; }
.devices-art figcaption { padding-right:36px; }
.devices-copy { padding:24px 8px 24px 36px; }
.devices-copy h2 { line-height:1.45; }
.devices-copy > p { font-size:16px; color:var(--body); line-height:1.9; margin-top:20px; }
.platform-list { display:grid; grid-template-columns:1fr 1fr; gap:20px 16px; margin-top:30px; }
.platform-list span { display:flex; align-items:center; gap:10px; font-size:14px; }
.platform-list .icon { color:var(--blue); width:22px; height:22px; }
.devices-copy .platform-note { font-size:12px; line-height:1.8; margin-top:24px; }
.devices-copy .quiet-link { margin-top:16px; }
.split-heading { display:flex; align-items:end; justify-content:space-between; gap:48px; margin-bottom:48px; }
.split-heading p { font-size:16px; color:var(--body); line-height:1.9; }
.solutions-layout { display:grid; grid-template-columns:42% 58%; align-items:center; }
.scenario-list { padding-right:48px; }
.scenario-list article { display:flex; align-items:flex-start; gap:20px; padding:28px 0; border-bottom:1px solid var(--line); }
.scenario-list article:first-child { padding-top:0; }
.scenario-list article > .icon { width:28px; height:28px; color:var(--blue); margin-top:3px; }
.scenario-list h3 { font-size:20px; }
.scenario-list p { font-size:14px; color:var(--body); line-height:1.9; margin-top:12px; }
.scenario-list .quiet-link { margin-top:16px; }
.solution-art { background:var(--mist); border-radius:var(--radius); padding:8px 0 24px; }
.solution-art figcaption { padding-right:24px; }
.experience-section { background:#f7f9fc; padding-block:88px; }
.experience-layout { display:grid; grid-template-columns:minmax(0,40fr) minmax(0,60fr); gap:16px; }
.experience-heading p { margin-top:24px; color:var(--body); line-height:1.9; }
.experience-heading .quiet-link { margin-top:24px; }
.experience-grid { display:grid; grid-template-columns:1fr 1fr; gap:40px 48px; padding-right:16px; }
.experience-grid article { border-top:1px solid #dbe3ed; padding-top:24px; }
.experience-grid .icon { width:28px; height:28px; color:var(--blue); }
.experience-grid h3 { margin-top:16px; font-size:18px; }
.experience-grid p { margin-top:12px; font-size:14px; color:var(--body); line-height:1.9; }
.faq-section { display:grid; grid-template-columns:40% 60%; }
.faq-section > div:first-child { padding-right:40px; }
.faq-section > div:first-child p { margin-top:20px; color:var(--body); font-size:14px; }
.faq-section .quiet-link { margin-top:24px; }
.faq-list details { border-bottom:1px solid var(--line); }
.faq-list details:first-child { border-top:1px solid var(--line); }
.faq-list summary { display:flex; align-items:center; justify-content:space-between; gap:24px; padding:24px 4px; cursor:pointer; list-style:none; font-size:16px; }
.faq-list summary::-webkit-details-marker { display:none; }
.faq-toggle { position:relative; display:block; width:16px; height:16px; flex:0 0 auto; }
.faq-toggle::before,.faq-toggle::after { content:""; position:absolute; background:var(--body); }
.faq-toggle::before { width:14px; height:1.5px; top:7px; left:1px; }
.faq-toggle::after { width:1.5px; height:14px; left:7px; top:1px; transition:transform .18s; }
details[open] .faq-toggle::after { transform:rotate(90deg); }
.faq-list details p { padding:0 36px 24px 4px; color:var(--body); font-size:14px; line-height:1.95; }
.business-section { color:var(--white); background:#125bd6; padding-block:72px; }
.business-layout { display:flex; align-items:center; justify-content:space-between; gap:48px; }
.business-layout h2 { font-size:42px; line-height:1.45; }
.business-layout > div:first-child p { color:#e0ebff; margin-top:20px; font-size:15px; }
.business-contact { border-left:1px solid #ffffff4d; padding-left:48px; display:grid; grid-template-columns:28px 1fr; gap:12px; }
.business-contact .icon { grid-row:1 / 4; margin-top:2px; }
.business-contact > span { font-size:14px; color:#e0ebff; }
.business-contact strong { font-family:"Segoe UI",sans-serif; font-size:25px; font-weight:500; word-break:break-word; line-height:1.5; }
.business-contact p { color:#e0ebff; font-size:12px; }
.footer { padding-block:56px 24px; }
.footer-top { display:grid; grid-template-columns:2fr 1fr 1fr 1.2fr; gap:32px; padding-bottom:44px; }
.footer-brand > p { color:var(--body); font-size:13px; margin-top:18px; }
.footer nav { display:flex; flex-direction:column; align-items:start; gap:10px; font-size:13px; color:var(--body); }
.footer nav strong { margin-bottom:8px; color:var(--ink); font-weight:500; font-size:14px; }
.footer nav a { min-height:28px; }
.footer nav a:hover { color:var(--blue); }
.footer-bottom { display:flex; justify-content:space-between; border-top:1px solid var(--line); padding-top:24px; color:var(--body); font-size:12px; }
.footer-bottom a { display:flex; gap:8px; align-items:center; }
.footer-bottom .icon { width:16px; height:16px; transform:rotate(-90deg); }
@media (min-width:1600px) { .hero-stage { min-height:528px; } .hero-art { width:104%; margin-left:-1%; } }
@media (max-width:1100px) {
  .container { width:calc(100% - 64px); }
  .nav { gap:32px; }
  .desktop-nav { gap:24px; margin-left:0; }
  .product-rail a { gap:10px; padding-inline:16px; }
  .product-rail .rail-arrow { display:none; }
  .product-rail span { font-size:11px; }
  .tech-copy { padding-left:40px; }
  .tech-copy h3 { font-size:28px; }
  .business-contact { padding-left:32px; }
  .business-contact strong { font-size:21px; }
}
@media (max-width:900px) {
  :root { --header-height:72px; }
  .desktop-nav { display:none; }
  .menu-button { display:flex; }
  .hero-stage { min-height:450px; grid-template-columns:46% 54%; }
  h1 { font-size:44px; }
  .hero-context { font-size:12px; }
  .hero-description { font-size:15px; }
  .hero-actions { gap:16px; }
  .hero-actions .button { padding-inline:20px; }
  .hero-benefits { gap:16px; font-size:11px; }
  .product-rail { grid-template-columns:1fr 1fr; padding-block:16px; }
  .product-rail a { padding:16px 24px; }
  .product-rail a:nth-child(3) { border-left:0; padding-left:0; }
  .product-rail span { font-size:12px; }
  h2 { font-size:32px; }
  .section { padding-block:64px; }
  .tech-panel { grid-template-columns:46% 54%; min-height:420px; }
  .tech-copy { padding:32px 0 32px 32px; }
  .tech-art { padding-right:8px; }
  .tech-copy > p { font-size:14px; }
  .check-list { font-size:12px; }
  .devices-copy { padding-left:20px; }
  .devices-copy > p { font-size:14px; }
  .platform-list { gap:16px 8px; }
  .platform-list span { font-size:12px; }
  .split-heading { gap:32px; }
  .split-heading p { font-size:14px; }
  .scenario-list { padding-right:32px; }
  .scenario-list article { gap:12px; }
  .experience-grid { gap:32px 24px; }
  .experience-layout { grid-template-columns:36% 64%; gap:0; }
  .experience-heading { padding-right:24px; }
  .faq-section { grid-template-columns:36% 64%; }
  .business-layout { gap:32px; }
  .business-layout h2 { font-size:32px; }
  .business-contact { padding-left:24px; grid-template-columns:1fr; }
  .business-contact .icon { display:none; }
  .footer-top { grid-template-columns:1.4fr 1fr 1fr; gap:24px; }
  .footer nav:last-child { grid-column:2 / 4; }
  .footer-brand { grid-row:1 / 3; }
}
@media (max-width:640px) {
  :root { --header-height:64px; }
  .container { width:calc(100% - 40px); }
  .brand img { width:34px; height:34px; }
  .brand span { font-size:25px; }
  .nav-actions { gap:8px; }
  .button-small { min-height:40px; padding:8px 16px; font-size:12px; }
  .hero-stage { display:flex; flex-direction:column; align-items:stretch; min-height:auto; }
  .hero-copy { padding-top:36px; padding-bottom:0; }
  .hero-context { margin-bottom:16px; font-size:12px; }
  h1 { font-size:clamp(38px,9.8vw,52px); letter-spacing:-.065em; line-height:1.25; }
  .hero-description { max-width:350px; font-size:14px; margin-top:18px; line-height:1.85; }
  .hero-actions { margin-top:24px; gap:24px; }
  .hero-actions .button { min-height:48px; padding:12px 24px; font-size:14px; }
  .hero-actions .quiet-link { font-size:14px; }
  .hero-benefits { margin-top:18px; font-size:12px; gap:20px; }
  .hero-art { width:112%; margin:4px 0 0 -6%; padding:0; }
  .hero-art figcaption { font-size:9px; right:7%; bottom:3%; }
  .hero-controls { gap:12px; padding-bottom:24px; }
  .scene-tabs { gap:24px; }
  .scene-tabs button { font-size:12px; }
  .carousel-position { display:none; }
  .icon-button { margin-left:auto; flex-shrink:0; }
  .product-rail a { padding:12px 0 12px 16px; gap:10px; }
  .product-rail a:nth-child(odd) { padding-left:0; }
  .product-rail a > .icon:first-child { width:24px; height:24px; }
  .product-rail strong { font-size:14px; }
  .product-rail span { font-size:10px; margin-top:4px; }
  .service-metrics { padding-block:28px 36px; grid-template-columns:1fr 1fr; gap:24px 16px; }
  .service-metrics strong { font-size:36px; }
  .service-metrics strong span { font-size:22px; }
  .service-metrics p { font-size:11px; margin-top:10px; }
  .service-metrics > div:last-child { grid-column:1 / -1; border-top:1px solid var(--line); padding-top:20px; display:flex; align-items:center; justify-content:center; gap:16px; }
  .service-metrics .metric-words { font-size:19px; }
  .service-metrics > div:last-child p { margin:0; font-size:11px; }
  .section { padding-block:52px; }
  h2 { font-size:28px; line-height:1.4; }
  .section-heading { margin-bottom:24px; text-align:left; }
  .section-heading p { font-size:13px; margin-top:12px; }
  .technology-tabs { margin-bottom:20px; }
  .technology-tabs button { flex-direction:column; gap:8px; font-size:12px; padding:12px 2px; }
  .technology-tabs .icon { width:22px; height:22px; }
  .tech-panel { display:flex; flex-direction:column; align-items:stretch; min-height:0; border-radius:16px; }
  .tech-copy { padding:28px 28px 0; }
  .tech-copy h3 { font-size:28px; }
  .tech-copy > p { font-size:13px; margin-top:16px; max-width:none; }
  .check-list { font-size:12px; gap:10px; margin:18px 0 12px; }
  .tech-copy .quiet-link { font-size:13px; }
  .tech-art { padding:0 12px 20px; margin-top:-4px; }
  .tech-art figcaption { margin-top:-4px; padding-right:8px; font-size:9px; }
  .devices-section { padding-block:48px; }
  .devices-layout { display:flex; flex-direction:column-reverse; gap:16px; }
  .devices-copy { width:100%; padding:0; }
  .devices-copy h2 { line-height:1.4; }
  .devices-copy > p { font-size:14px; margin-top:16px; }
  .platform-list { max-width:360px; gap:20px 24px; margin-top:24px; }
  .platform-list span { font-size:14px; }
  .devices-copy .platform-note { font-size:11px; max-width:360px; }
  .devices-art { width:100%; margin-left:0; }
  .devices-art figcaption { font-size:9px; }
  .split-heading { display:block; margin-bottom:28px; }
  .split-heading p { margin-top:16px; font-size:14px; }
  .split-heading p br { display:none; }
  .solutions-layout { display:flex; flex-direction:column; gap:28px; }
  .scenario-list { padding:0; }
  .scenario-list article { gap:16px; padding-block:24px; }
  .scenario-list h3 { font-size:18px; }
  .scenario-list p { font-size:13px; margin-top:8px; }
  .solution-art figcaption { font-size:9px; }
  .experience-section { padding-block:48px; }
  .experience-layout { display:block; }
  .experience-heading { padding-right:0; }
  .experience-heading > p { font-size:14px; margin-top:16px; }
  .experience-heading > p br { display:none; }
  .experience-heading .quiet-link { margin-top:12px; }
  .experience-grid { margin-top:24px; padding-right:0; gap:28px 24px; }
  .experience-grid article { padding-top:20px; }
  .experience-grid h3 { font-size:16px; line-height:1.55; }
  .experience-grid p { font-size:12px; }
  .faq-section { display:block; }
  .faq-section > div:first-child { padding-right:0; }
  .faq-list { margin-top:24px; }
  .faq-list summary { padding-block:20px; font-size:14px; }
  .faq-list details p { font-size:13px; }
  .business-section { padding-block:48px; }
  .business-layout { display:block; }
  .business-layout h2 { font-size:32px; }
  .business-layout > div:first-child p { font-size:13px; max-width:300px; }
  .business-contact { border-left:0; border-top:1px solid #ffffff4d; margin-top:28px; padding:24px 0 0; gap:8px; }
  .business-contact strong { font-size:23px; }
  .footer { padding-top:40px; }
  .footer-top { grid-template-columns:1fr 1fr; gap:28px; padding-bottom:28px; }
  .footer-brand { grid-column:1 / -1; grid-row:auto; }
  .footer nav:last-child { grid-column:1 / -1; }
  .footer nav { gap:4px; font-size:12px; }
  .footer nav a { min-height:36px; display:flex; align-items:center; }
}
@media (prefers-reduced-motion:reduce) {
  html { scroll-behavior:auto; }
  *,*::before,*::after { animation:none !important; transition:none !important; }
}

@keyframes scene-in { from { opacity:.2; transform:translateX(12px); } to { opacity:1; transform:translateX(0); } }
.hero-art img:not([hidden]), .tech-panel:not([hidden]) .tech-art img { animation:scene-in .4s ease-out both; }
.icon-button:disabled { cursor:default; opacity:.55; }