:root {
  --ink: #152033;
  --muted: #647084;
  --subtle: #7a8694;
  --line: #e6eaf0;
  --paper: #fff;
  --soft: #f6f8fa;
  --orange: #e95d1d;
  --orange-dark: #c94810;
  --orange-soft: #fff4ed;
  --dark: #111a27;
  --success: #14735a;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 16px/1.75 Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
picture { display: block; }
button, select { font: inherit; }
button { color: inherit; }
:focus-visible { outline: 3px solid rgba(233, 93, 29, .32); outline-offset: 3px; }
::selection { background: #ffd8c5; }
h1, h2, h3, h4, p { margin-top: 0; }
h1, h2, h3, h4 { line-height: 1.3; letter-spacing: -.025em; }
h1 { margin-bottom: 22px; font-size: 48px; }
h2 { margin-bottom: 14px; font-size: 31px; }
h3 { margin-bottom: 10px; font-size: 19px; }
p { margin-bottom: 20px; }
.container { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.narrow { width: min(calc(100% - 48px), 800px); margin-inline: auto; }
.section { padding: 78px 0; }
.section-soft { background: var(--soft); }
.section-head { max-width: 650px; margin-bottom: 34px; }
.section-head p { margin-bottom: 0; }
.lead { color: var(--muted); font-size: 17px; line-height: 1.85; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.label, .eyebrow {
  display: block;
  margin-bottom: 13px;
  color: var(--orange-dark);
  font-size: 13px;
  font-weight: 700;
}
.text-link { color: var(--orange-dark); font-size: 14px; font-weight: 700; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.skip-link { position: fixed; top: -60px; left: 20px; z-index: 2000; padding: 10px 16px; color: #fff; border-radius: 8px; background: var(--dark); }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 68px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(12px);
}
.nav { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; flex: 0 0 auto; }
.logo { width: 122px; }
.site-nav { display: flex; align-items: center; gap: 29px; font-size: 14px; font-weight: 600; }
.site-nav a { color: #465266; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--orange-dark); }
.site-nav .nav-console { padding-left: 26px; border-left: 1px solid var(--line); }
.site-nav .nav-contact { padding: 8px 15px; color: #fff; border-radius: 7px; background: var(--orange); }
.site-nav .nav-contact:hover { color: #fff; background: var(--orange-dark); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; border-radius: 8px; background: transparent; cursor: pointer; }
.menu-toggle svg { width: 24px; height: 24px; }

.btn { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 10px 18px; color: var(--ink); border: 1px solid var(--line); border-radius: 8px; background: #fff; font-size: 14px; font-weight: 700; line-height: 1.4; cursor: pointer; }
.btn:hover { border-color: #bdc7d2; background: #fbfcfd; }
.btn-primary { color: #fff; border-color: var(--orange); background: var(--orange); }
.btn-primary:hover { color: #fff; border-color: var(--orange-dark); background: var(--orange-dark); }
.btn-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.button-note { margin: 12px 0 0; color: var(--muted); font-size: 12px; }

.hero { padding: 72px 0 76px; }
.hero-grid { display: grid; grid-template-columns: 1fr .9fr; align-items: center; gap: 76px; }
.hero-copy { max-width: 570px; }
.hero-copy .lead { max-width: 545px; }
.hero-note { margin: 20px 0 0; color: var(--muted); font-size: 13px; }
.hero-figure { margin: 0; padding: 28px 28px 20px; border: 1px solid #edf0f2; border-radius: 12px; background: linear-gradient(145deg, #fafbfc, #f1f4f6); }
.hero-figure img { width: 100%; max-height: 360px; margin: auto; object-fit: contain; }
.hero-figure figcaption { padding-top: 18px; color: var(--muted); border-top: 1px solid #e0e5e9; font-size: 13px; text-align: center; }

.flow { display: grid; grid-template-columns: repeat(3, 1fr); margin-bottom: 32px; }
.flow-item { position: relative; padding: 0 28px 0 54px; }
.flow-item:first-child { padding-left: 42px; }
.flow-number { position: absolute; top: 1px; left: 0; color: var(--orange); font-size: 13px; font-weight: 800; }
.flow-item:not(:last-child)::after { content: ""; position: absolute; top: 17px; right: 0; width: 28px; height: 1px; background: #cbd3dc; }
.flow-item p { margin: 0; color: var(--muted); font-size: 14px; }
.connection { margin: 0; padding: 22px 22px 15px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.connection img { width: 100%; object-fit: contain; }
.connection figcaption { padding: 10px 0 0; color: var(--muted); font-size: 12px; text-align: center; }
.center-link { margin-top: 22px; text-align: center; }

.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.product-card { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.product-media { position: relative; height: 250px; display: flex; align-items: center; justify-content: center; background: var(--soft); }
.product-media img { width: 82%; height: 225px; object-fit: contain; }
.interface-badge { position: absolute; top: 18px; left: 18px; padding: 4px 9px; color: var(--muted); border: 1px solid #dbe1e7; border-radius: 999px; background: rgba(255, 255, 255, .88); font-size: 10px; font-weight: 700; letter-spacing: .07em; }
.product-body { padding: 25px; }
.product-body h3 { font-size: 23px; }
.product-use { margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.product-specs { margin: 0 0 20px; padding: 0; list-style: none; }
.product-specs li { display: flex; justify-content: space-between; gap: 20px; padding: 8px 0; border-bottom: 1px solid #edf0f3; font-size: 13px; }
.product-specs li:last-child { border: 0; }
.product-specs span { color: var(--muted); }
.product-actions { display: flex; align-items: center; gap: 20px; }

.client-grid { display: grid; grid-template-columns: 1.18fr .82fr; align-items: center; gap: 56px; }
.client-shot { overflow: hidden; margin: 0; border: 1px solid #dce2e8; border-radius: 10px; background: #fff; box-shadow: 0 12px 30px rgba(21, 32, 51, .06); }
.client-shot img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top center; }
.client-shot figcaption, .doc-image figcaption { padding: 10px 14px; color: var(--muted); border-top: 1px solid var(--line); background: #fff; font-size: 12px; line-height: 1.6; }
.client-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; margin: 22px 0 26px; padding: 0; list-style: none; font-size: 14px; }
.client-list li::before { content: "✓"; margin-right: 8px; color: var(--orange); font-weight: 800; }
.download-meta { margin: 12px 0 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.client-alt { margin: 16px 0 0; color: var(--muted); font-size: 13px; line-height: 1.85; }
.client-alt span { color: var(--subtle); }

.support-layout { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(320px, .88fr); align-items: start; gap: 64px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 18px 38px 18px 0; font-size: 14px; font-weight: 700; line-height: 1.6; list-style: none; cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; top: 15px; right: 7px; color: var(--muted); font-size: 22px; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: 0; padding: 0 32px 19px 0; color: var(--muted); font-size: 13px; }
.arrow-link { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.arrow-link:first-child { border-top: 1px solid var(--line); }
.arrow-link p { margin: 3px 0 0; color: var(--muted); font-size: 14px; }
.arrow-link b { color: var(--orange); font-size: 21px; font-weight: 400; }
.docs-panel { padding: 30px; color: #fff; border-radius: 12px; background: var(--dark); }
.docs-panel .label { color: #f3a47e; }
.docs-panel h2 { margin-bottom: 12px; font-size: 27px; }
.docs-panel > p { margin-bottom: 20px; color: #a7b3c0; font-size: 13px; }
.docs-panel .arrow-link { border-color: #33404e; }
.docs-panel .arrow-link strong { color: #fff; }
.docs-panel .arrow-link p { color: #a7b3c0; font-size: 12px; }
.docs-panel .arrow-link b { color: #f3a47e; }

.contact { padding: 44px 0; border-top: 1px solid #f0ded3; background: var(--orange-soft); }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 64px; }
.contact-copy { max-width: 570px; }
.contact-copy h2 { margin-bottom: 10px; font-size: 28px; }
.contact-copy p { margin-bottom: 12px; color: var(--muted); }
.contact-email { margin: 0 !important; font-size: 13px; }
.contact-email a { color: var(--orange-dark); font-weight: 700; }
.wechat-card { display: flex; align-items: center; gap: 18px; padding: 16px 18px; border: 1px solid #ecd9ce; border-radius: 12px; background: #fff; }
.contact-qr { flex: 0 0 108px; width: 108px; padding: 5px; }
.wechat-detail { display: flex; min-width: 190px; flex-direction: column; align-items: flex-start; }
.wechat-title { color: var(--muted); font-size: 12px; }
.wechat-detail strong { margin: 2px 0 3px; font-size: 20px; letter-spacing: .01em; }
.wechat-hint { margin-bottom: 12px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.wechat-detail .btn { min-height: 38px; padding: 7px 14px; font-size: 13px; }

.site-footer { padding: 32px 0 22px; color: #aab5c3; background: var(--dark); }
.footer-main { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.footer-brand { display: flex; align-items: center; gap: 18px; }
.footer-brand img { width: 112px; margin: 0; filter: brightness(0) invert(1); }
.footer-brand p { margin: 0; color: #8593a4; font-size: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; font-size: 12px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 24px; padding-top: 18px; border-top: 1px solid #283344; color: #758396; font-size: 11px; }
.footer-bottom p { margin: 0; }

.breadcrumbs { padding: 22px 0 0; color: var(--muted); font-size: 12px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #b2bac4; }
.breadcrumbs a:hover { color: var(--orange-dark); }
.page-hero { padding: 42px 0 64px; }
.page-hero-grid { display: grid; grid-template-columns: 1fr .85fr; align-items: center; gap: 64px; }
.page-hero h1 { margin-bottom: 18px; font-size: 43px; }
.page-hero-media { margin: 0; padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--soft); }
.page-hero-media img { width: 100%; max-height: 340px; object-fit: contain; }
.page-hero-media.client-shot { padding: 0; background: #fff; }
.page-hero-media.client-shot img { max-height: none; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--soft); font-size: 14px; }
td { color: var(--muted); }
td:first-child { color: var(--ink); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.info-panel { padding-top: 22px; border-top: 2px solid var(--ink); }
.info-panel h2 { font-size: 24px; }
.check-list { margin: 0; padding: 0; list-style: none; }
.check-list li { position: relative; margin-bottom: 12px; padding-left: 24px; color: var(--muted); }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--orange); font-weight: 800; }
.number-list { padding-left: 22px; color: var(--muted); }
.number-list li { margin-bottom: 12px; padding-left: 5px; }
.next-version { padding: 34px 0; border-top: 1px solid var(--line); background: var(--soft); }
.next-version p { margin-bottom: 8px; }

.download-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 24px; }
.download-panel { padding: 28px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.download-panel.featured { border-color: #edb99f; }
.download-panel h2 { font-size: 25px; }
.download-panel .btn { margin-top: 8px; }
.download-panel .download-meta { margin-bottom: 0; }
.platform-note { padding-top: 20px; border-top: 1px solid var(--line); }
.platform-note p { color: var(--muted); font-size: 14px; }
.notice { margin: 24px 0; padding: 18px 20px; border-left: 3px solid var(--orange); background: var(--orange-soft); }
.notice p:last-child { margin-bottom: 0; }
.hash { overflow-wrap: anywhere; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12px; }
.driver-details { border-top: 1px solid var(--line); }
.driver-details summary { padding: 20px 0; font-weight: 700; cursor: pointer; }
.driver-details summary::marker { color: var(--orange); }
.driver-content { padding-bottom: 24px; }
.driver-links { display: grid; gap: 10px; }
.driver-link { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.driver-link span { color: var(--orange-dark); font-weight: 700; }

.doc-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); justify-content: space-between; gap: 70px; padding-top: 34px; padding-bottom: 80px; }
.doc-sidebar { position: sticky; top: 96px; align-self: start; max-height: calc(100vh - 120px); overflow-y: auto; padding-right: 22px; border-right: 1px solid var(--line); }
.doc-sidebar-title { margin-bottom: 15px; font-size: 13px; font-weight: 800; }
.doc-nav, .doc-nav ul { margin: 0; padding: 0; list-style: none; }
.doc-nav li { margin-bottom: 4px; }
.doc-nav a { display: block; padding: 7px 10px; color: var(--muted); border-radius: 6px; font-size: 13px; }
.doc-nav a:hover, .doc-nav a.active { color: var(--orange-dark); background: var(--orange-soft); }
.doc-nav .sidebar-group-title { font-weight: 700; }
.doc-nav .sidebar-submenu { margin: 3px 0 8px 10px; }
.doc-nav .sidebar-submenu a { padding-top: 4px; padding-bottom: 4px; font-size: 12px; font-weight: 400; }
.doc-mobile-toc { display: none; }
.doc-header { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.doc-header h1 { margin-bottom: 12px; font-size: 38px; }
.doc-header p { margin: 0; color: var(--muted); font-size: 14px; }
.doc-section { padding-top: 42px; }
.doc-section h2 { margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--line); font-size: 25px; }
.doc-section h3 { margin-top: 30px; font-size: 18px; scroll-margin-top: 92px; }
.doc-section h4 { margin-top: 25px; font-size: 16px; }
.doc-section p, .doc-section li { color: #465266; }
.doc-section ul, .doc-section ol { padding-left: 22px; }
.doc-section li { margin-bottom: 8px; }
.doc-section a.doc-link { color: var(--orange-dark); text-decoration: underline; text-underline-offset: 3px; }
.doc-image { overflow: hidden; margin: 22px 0; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.doc-image img { width: 100%; }
.doc-image img, .screenshot { cursor: zoom-in; }
.doc-port img { padding: 8px; }
.screenshot { width: 100%; margin: 20px 0 26px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.image-dialog { width: min(94vw, 1400px); max-width: none; max-height: 92vh; padding: 0; border: 0; border-radius: 12px; background: transparent; overflow: visible; }
.image-dialog::backdrop { background: rgba(10, 18, 27, .84); backdrop-filter: blur(4px); }
.image-dialog img { max-width: 100%; max-height: 88vh; margin: auto; border-radius: 8px; background: #fff; object-fit: contain; }
.dialog-close { position: absolute; top: -44px; right: 0; width: 34px; height: 34px; padding: 0; color: #fff; border: 1px solid #687687; border-radius: 50%; background: #243142; font-size: 20px; line-height: 1; cursor: pointer; }
.port-list { padding-left: 0 !important; list-style: none; }
.port-list li { position: relative; padding-left: 20px; }
.port-list li::before { content: ""; position: absolute; top: 12px; left: 0; width: 6px; height: 6px; border-radius: 50%; background: var(--orange); }
.connect-steps { counter-reset: connect; padding-left: 0 !important; list-style: none; }
.connect-steps li { position: relative; min-height: 30px; padding-left: 42px; }
.connect-steps li::before { counter-increment: connect; content: counter(connect); position: absolute; top: 1px; left: 0; width: 26px; height: 26px; display: grid; place-items: center; color: var(--orange-dark); border-radius: 50%; background: var(--orange-soft); font-size: 12px; font-weight: 800; }
.callout { margin: 24px 0; padding: 16px 18px; border-left: 3px solid var(--orange); background: var(--orange-soft); }
.callout-warning { border-left-color: #c13b32; background: #fff5f3; }
.callout-title { margin-bottom: 6px; font-weight: 700; }
.callout-title svg { display: inline-block; margin-right: 6px; vertical-align: -3px; }
.callout p { margin: 0; font-size: 14px; }
.kbd { display: inline-block; padding: 1px 7px; border: 1px solid var(--line); border-radius: 5px; background: var(--soft); font: 12px ui-monospace, SFMono-Regular, Consolas, monospace; }
code { padding: 2px 5px; border-radius: 4px; background: var(--soft); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .9em; }
.faq-item { padding: 18px 0; border-bottom: 1px solid var(--line); }
.faq-question { margin-bottom: 6px; font-weight: 700; }
.faq-answer { margin: 0; font-size: 14px; }

.error-page { min-height: 70vh; display: grid; place-items: center; padding: 60px 0; text-align: center; }
.error-code { margin-bottom: 8px; color: var(--orange); font-size: 80px; font-weight: 800; line-height: 1; }

@media (max-width: 960px) {
  .hero-grid { gap: 38px; }
  .doc-layout { grid-template-columns: 200px minmax(0, 1fr); gap: 38px; }
  .contact-grid { gap: 32px; }
}

@media (max-width: 800px) {
  .container, .narrow { width: calc(100% - 32px); }
  .section { padding: 54px 0; }
  h1 { font-size: 35px; }
  h2 { font-size: 27px; }
  .lead { font-size: 16px; }
  .site-header { height: 62px; }
  .logo { width: 108px; }
  .menu-toggle { display: block; }
  .site-nav { position: fixed; top: 62px; right: 0; left: 0; display: none; padding: 18px 24px 24px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 18px 30px rgba(21, 32, 51, .08); }
  .site-nav.open { display: grid; gap: 4px; }
  .site-nav a { display: block; padding: 11px 4px; font-size: 15px; }
  .site-nav .nav-console { padding-left: 4px; border-left: 0; }
  .site-nav .nav-contact { margin-top: 6px; padding: 11px 15px; text-align: center; }
  .hero { padding: 44px 0 50px; }
  .hero-grid, .page-hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-copy { max-width: none; }
  .hero-figure { padding: 20px; }
  .hero-figure img { max-height: 290px; }
  .flow { grid-template-columns: 1fr; gap: 20px; }
  .flow-item, .flow-item:first-child { padding: 0 0 0 42px; }
  .flow-item::after { display: none; }
  .connection { padding: 12px 10px; }
  .product-grid, .content-grid, .download-layout { grid-template-columns: 1fr; }
  .product-media img { width: 88%; }
  .client-grid { grid-template-columns: 1fr; gap: 32px; }
  .client-shot figcaption { font-size: 11px; }
  .download-meta { font-size: 11px; }
  .support-layout { grid-template-columns: 1fr; gap: 34px; }
  .docs-panel { padding: 25px 22px; }
  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .wechat-card { width: 100%; max-width: 420px; margin: 0 auto; }
  .footer-main { align-items: flex-start; flex-direction: column; gap: 20px; }
  .footer-brand { align-items: flex-start; flex-direction: column; gap: 10px; }
  .footer-links { gap: 14px 20px; }
  .footer-bottom { flex-direction: column; gap: 5px; }
  .page-hero { padding: 24px 0 48px; }
  .page-hero h1 { font-size: 34px; }
  .doc-layout { display: block; padding-top: 18px; }
  .doc-sidebar { display: none; }
  .doc-mobile-toc { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 16px; margin-bottom: 24px; color: var(--muted); font-size: 13px; }
  .doc-mobile-toc select { width: 100%; min-width: 0; padding: 11px 12px; color: var(--ink); border: 1px solid var(--line); border-radius: 8px; background: #fff; }
  .doc-header h1 { font-size: 31px; }
  .doc-section { padding-top: 32px; }
  .doc-port img { padding: 0; }
}

@media (max-width: 390px) {
  h1 { font-size: 32px; }
  .btn-row .btn { width: 100%; }
  .client-list { grid-template-columns: 1fr; }
  .product-body, .download-panel { padding: 21px; }
  .contact { padding: 36px 0; }
  .wechat-card { gap: 13px; padding: 13px; }
  .contact-qr { flex-basis: 96px; width: 96px; }
  .wechat-detail { min-width: 0; }
  .wechat-detail strong { font-size: 18px; }
  .wechat-hint { font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

@media print {
  .site-header, .site-footer, .doc-sidebar, .doc-mobile-toc, .btn { display: none !important; }
  body { color: #000; }
  .doc-layout { display: block; padding: 0; }
  .section, .page-hero { padding: 24px 0; }
}