/* 设计依据：参考站首页 43810.e3de057e8d.css 的 .td-surface 配色；仅供独立落地页使用。 */
:root {
  color-scheme: light;
  --paper: #f6f6f7;
  --surface: #fff;
  --ink: #18181b;
  --muted: #55555d;
  --line: #e4e4e7;
  --accent: #2b59c3;
  --accent-dark: #22489e;
  --soft: #e8eefa;
  font-family: "HarmonyOS Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 15px; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
a, button, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
img { max-width: 100%; height: auto; }
p, h1, h2, h3 { margin-top: 0; }
p { margin-bottom: 20px; }
h1, h2, h3 { font-weight: 700; letter-spacing: -.035em; line-height: 1.25; }
h1 { margin-bottom: 25px; font-size: clamp(48px, 5.1vw, 74px); line-height: 1.18; }
h2 { margin-bottom: 22px; font-size: clamp(32px, 3.2vw, 46px); }
h3 { margin-bottom: 14px; font-size: 21px; }
code, pre { font-family: Consolas, "SFMono-Regular", monospace; }
pre { margin: 0; white-space: pre; overflow-x: auto; }
.wrap { width: min(1200px, calc(100% - 96px)); margin-inline: auto; }
.accent { color: var(--accent); }
.skip-link { position: fixed; top: -70px; left: 16px; z-index: 100; padding: 10px 20px; color: white; background: var(--ink); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.site-header { position: relative; z-index: 20; border-bottom: 1px solid var(--line); background: var(--surface); }
.header-inner { height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; gap: 10px; align-items: center; font-size: 23px; font-weight: 700; white-space: nowrap; letter-spacing: -.04em; }
.brand img { width: 36px; height: 36px; object-fit: contain; }
.site-nav { display: flex; align-items: center; gap: 32px; font-size: 14px; }
.site-nav > a:not(.button) { color: var(--muted); }
.site-nav > a:hover { color: var(--accent); }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: 25px; padding: 12px 23px; border: 1px solid transparent; border-radius: 8px; font-size: 15px; font-weight: 500; transition: background .18s, border-color .18s; }
.button span, .text-link span { font-size: 19px; line-height: 1; }
.primary { background: var(--accent); color: white; }
.primary:hover { color: white !important; background: var(--accent-dark); }
.nav-cta { min-height: 42px; padding: 8px 19px; font-size: 14px; gap: 22px; }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 12px 10px; border: 1px solid var(--line); border-radius: 8px; background: white; }
.nav-toggle span { display: block; height: 2px; margin: 4px 0; background: var(--ink); }
.eyebrow { display: flex; align-items: center; gap: 13px; margin-bottom: 28px; color: var(--muted); font-size: 11px; letter-spacing: .1em; font-weight: 500; }
.eyebrow-index { color: var(--accent); font-family: Consolas, monospace; letter-spacing: 0; }
.eyebrow-rule { width: 24px; height: 1px; background: #c6c8ce; }
.hero { display: grid; grid-template-columns: 1fr 1fr; gap: 74px; align-items: center; padding-top: 78px; padding-bottom: 72px; }
.hero-copy { padding-bottom: 10px; }
.hero-lead { max-width: 430px; margin-bottom: 30px; color: var(--muted); font-size: 18px; line-height: 1.9; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 26px; }
.text-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 14px; font-weight: 500; }
.text-link:hover { color: var(--accent); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 30px; font-size: 11px; color: var(--muted); }
.hero-meta span::before { display: inline-block; content: ""; width: 4px; height: 4px; margin-right: 8px; border-radius: 50%; background: #8b9bb8; vertical-align: middle; }
.hero-visual { min-width: 0; border: 1px solid var(--line); border-radius: 12px; background: #efeff1; padding: 20px; }
.visual-topline { display: flex; justify-content: space-between; color: #62636c; font: 10px/1.5 Consolas, monospace; letter-spacing: .07em; }
.visual-grid { padding: 24px 10px 25px; }
.visual-label { text-align: center; margin-bottom: 12px; font: 9px/1.5 Consolas, monospace; color: #656873; letter-spacing: .17em; }
.tool-pills { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.tool-pills span { padding: 8px 4px; border: 1px solid #dcdfe7; border-radius: 6px; background: #f9f9fa; text-align: center; color: #4c5261; font-size: 11px; }
.connector-line { height: 28px; display: grid; grid-template-columns: repeat(3, 1fr); padding-inline: 10px; }
.connector-line i { justify-self: center; height: 28px; width: 1px; background: #c0cce4; }
.gateway-card { display: flex; gap: 12px; align-items: center; padding: 17px; border: 1px solid #c8d5ef; border-radius: 8px; background: var(--soft); }
.gateway-mark { flex-shrink: 0; display: grid; place-items: center; width: 46px; height: 46px; border-radius: 10px; background: white; }
.gateway-mark img { width: 34px; height: 34px; }
.gateway-card strong { display: block; font-size: 18px; line-height: 1.5; }
.gateway-card small { display: block; color: #506185; font: 9px/1.6 Consolas, monospace; letter-spacing: .08em; }
.live-badge { display: inline-flex; gap: 6px; align-items: center; margin-left: auto; color: var(--accent-dark); font: 9px/1.6 Consolas, monospace; }
.live-badge i { width: 5px; height: 5px; background: var(--accent); border-radius: 50%; }
.code-card { background: white; border: 1px solid #e0e1e6; border-radius: 8px; overflow: hidden; }
.code-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 39px; padding: 7px 16px; border-bottom: 1px solid var(--line); font: 10px/1.5 Consolas, monospace; color: #6b6d78; }
.code-toolbar > span:first-child:has(i) { display: flex; gap: 4px; }
.code-toolbar i { width: 5px; height: 5px; border-radius: 50%; background: #cdd0d8; }
.code-toolbar button { border: 0; border-radius: 4px; padding: 4px 7px; color: inherit; font-size: 10px; line-height: 1.5; background: transparent; }
.code-toolbar button:hover { background: var(--soft); color: var(--accent); }
.code-card pre { padding: 18px 19px; font-size: 10.5px; line-height: 1.8; color: #4a4e5c; }
.code-card b { color: var(--accent); font-weight: 500; }
.code-card em { color: #575d6d; font-style: normal; }
.code-card strong { color: #2c6391; font-weight: 400; }
.code-status { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; padding: 10px 13px; border-top: 1px solid #ededf1; color: #666b77; font-size: 9px; }
.status-dot { width: 4px; height: 4px; border-radius: 50%; background: #637fa9; }
.status-divider { margin-inline: 2px; }
.signal-strip { display: grid; grid-template-columns: 1.8fr repeat(4, 1fr); gap: 16px; align-items: center; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding-block: 25px; }
.signal-strip p { margin: 0; color: var(--muted); font-size: 12px; }
.signal-strip > span { text-align: center; color: #4a4a53; font-size: 14px; font-weight: 500; }
.section { padding-block: 80px; }
.section-heading { display: flex; justify-content: space-between; gap: 48px; align-items: end; margin-bottom: 36px; }
.section-heading .eyebrow { margin-bottom: 20px; }
.section-heading h2 { margin: 0; }
.section-heading > p { width: 345px; max-width: 40%; margin: 0 0 3px; color: var(--muted); font-size: 14px; line-height: 1.95; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card { position: relative; min-width: 0; padding: 28px; background: white; border: 1px solid var(--line); border-radius: 12px; }
.feature-card-primary { background: var(--soft); border-color: #d9e1f3; }
.card-number { position: absolute; top: 24px; right: 26px; color: #b2b6c1; font: 12px/1.5 Consolas, monospace; }
.feature-icon { display: grid; place-items: center; width: 46px; height: 46px; margin-bottom: 34px; border: 1px solid var(--line); border-radius: 9px; color: var(--accent); font: 19px/1 Consolas, monospace; background: var(--paper); }
.feature-card-primary .feature-icon { background: #f5f7fd; border-color: #d5def2; }
.feature-card h3 { margin-bottom: 13px; font-size: 20px; }
.feature-card p { min-height: 80px; color: var(--muted); font-size: 13px; line-height: 1.95; }
.feature-card .text-link { width: 100%; padding-top: 20px; border-top: 1px solid var(--line); font-size: 12px; }
.feature-card-primary .text-link { border-color: #d0dbf1; color: var(--accent-dark); }
.integration-section { border-block: 1px solid var(--line); background: white; padding-block: 80px; }
.integration-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 100px; align-items: center; }
.integration-grid .eyebrow { margin-bottom: 22px; }
.section-lead { max-width: 400px; color: var(--muted); font-size: 14px; line-height: 1.95; }
.steps { list-style: none; margin: 30px 0 25px; padding: 0; }
.steps li { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 20px; }
.steps li > span { display: grid; place-items: center; width: 32px; height: 32px; flex-shrink: 0; border: 1px solid var(--line); border-radius: 6px; color: #52678d; font: 11px/1.5 Consolas, monospace; }
.steps h3 { margin-bottom: 4px; font-size: 15px; line-height: 1.5; }
.steps p { margin: 0; font-size: 12px; color: var(--muted); }
.integration-grid > div > .text-link { color: var(--accent); }
.code-panel { min-width: 0; background: #1d2127; color: #eef1f5; border: 1px solid #2a3038; border-radius: 12px; overflow: hidden; }
.code-panel .code-toolbar { min-height: 48px; border-color: #343942; color: #b9bdc6; font-size: 11px; }
.code-panel .code-toolbar button { font-size: 11px; padding: 5px 9px; }
.code-panel .code-toolbar button:hover { background: #343942; color: white; }
.code-panel pre { padding: 28px 24px; font-size: 12px; line-height: 2; }
.syntax-muted { color: #b4c8f2; }
.syntax-value { color: #a8c7ee; }
.faq-section { padding-block: 80px; }
.compact-heading { margin-bottom: 32px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; align-items: center; gap: 20px; min-height: 78px; padding: 20px 0; font-size: 16px; font-weight: 500; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { font-size: 23px; font-weight: 400; color: #666c79; transition: transform .15s; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details > p { max-width: 850px; margin-bottom: 25px; padding-right: 36px; color: var(--muted); font-size: 14px; }
.faq-list p a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.closing-section { background: #18181b; color: white; text-align: center; padding-block: 85px; }
.closing-inner .eyebrow { justify-content: center; color: #b4b4bd; margin-bottom: 27px; }
.closing-inner .eyebrow-index { color: #86a6ec; }
.closing-inner .eyebrow-rule { background: #52525b; }
.closing-inner h2 { margin-bottom: 20px; font-size: clamp(38px, 4vw, 56px); line-height: 1.22; }
.closing-inner h2 > span { color: #86a6ec; }
.closing-inner > p:not(.eyebrow) { margin-bottom: 30px; color: #bfbfc7; font-size: 14px; }
.closing-inner .actions { justify-content: center; gap: 14px; }
.light { background: white; color: var(--ink); }
.light:hover { background: var(--soft); }
.outline-light { border-color: #52525b; color: white; }
.outline-light:hover { background: #27272a; border-color: #71717a; }
.site-footer { background: white; padding-top: 43px; }
.footer-top { display: flex; justify-content: space-between; gap: 32px; padding-bottom: 30px; }
.footer-top .brand { font-size: 20px; }
.footer-top .brand img { width: 32px; height: 32px; }
.footer-top p { color: var(--muted); font-size: 12px; margin: 12px 0 0; }
.footer-links { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 28px; padding-top: 9px; color: var(--muted); font-size: 12px; }
.footer-links a:hover, .footer-bottom a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); padding-block: 20px; color: #72727b; font-size: 10px; }
.footer-bottom p { margin: 0; }
@media (min-width: 1600px) { .hero { padding-block: 100px; } }
@media (max-width: 1100px) {
  .wrap { width: calc(100% - 64px); }
  .site-nav { gap: 23px; }
  .hero { gap: 40px; padding-block: 62px; }
  h1 { font-size: 54px; }
  .hero-lead { font-size: 16px; }
  .hero-copy .eyebrow { font-size: 9px; gap: 10px; }
  .hero-visual { padding: 15px; }
  .hero .actions { gap: 20px; }
  .feature-card { padding: 23px; }
  .integration-grid { gap: 55px; }
  .code-panel pre { font-size: 10px; padding: 25px 18px; }
}
@media (max-width: 800px) {
  .wrap { width: calc(100% - 40px); }
  .header-inner { height: 70px; }
  .brand { font-size: 21px; }
  .brand img { width: 32px; height: 32px; }
  .nav-toggle { display: block; }
  .site-nav { display: flex; position: absolute; left: 0; right: 0; top: 70px; flex-wrap: wrap; padding: 15px 20px 20px; gap: 12px 24px; background: white; border-bottom: 1px solid var(--line); }
  .site-header { margin-bottom: 130px; }
  .js .site-header { margin-bottom: 0; }
  .js .site-nav { display: none; }
  .js .site-nav.is-open { display: flex; }
  .site-nav > a { padding-block: 8px; }
  .site-nav .button { margin-left: auto; }
  .hero { grid-template-columns: 1fr; gap: 38px; padding-top: 45px; padding-bottom: 40px; }
  .hero-copy { padding: 0; }
  .hero-copy .eyebrow { margin-bottom: 22px; font-size: 10px; }
  h1 { font-size: clamp(42px, 8vw, 62px); margin-bottom: 23px; }
  .hero-lead { max-width: 480px; margin-bottom: 26px; font-size: 16px; }
  .hero-meta { margin-top: 22px; }
  .hero-visual { width: 100%; max-width: 600px; justify-self: center; padding: 20px; }
  .code-card pre { font-size: 12px; }
  .signal-strip { grid-template-columns: repeat(4, 1fr); gap: 18px 10px; padding-block: 24px; }
  .signal-strip p { grid-column: 1 / -1; text-align: center; }
  .signal-strip > span { font-size: 12px; }
  .section, .faq-section { padding-block: 50px; }
  .section-heading { display: block; margin-bottom: 28px; }
  .section-heading > p { width: auto; max-width: 100%; margin: 20px 0 0; font-size: 14px; }
  h2 { font-size: 35px; }
  .feature-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 25px; }
  .feature-card p { min-height: 0; max-width: 570px; }
  .feature-icon { margin-bottom: 23px; }
  .feature-card .text-link { padding-top: 15px; }
  .integration-section { padding-block: 50px; }
  .integration-grid { grid-template-columns: 1fr; gap: 36px; }
  .section-lead { max-width: 600px; }
  .code-panel pre { font-size: 12px; padding: 24px; }
  .faq-list summary { font-size: 15px; min-height: 72px; }
  .closing-section { padding-block: 65px; }
  .closing-inner h2 { font-size: 40px; }
  .footer-top { display: block; }
  .footer-links { gap: 24px; margin-top: 25px; }
  .footer-bottom { display: block; }
  .footer-bottom p + p { margin-top: 9px; }
}
@media (max-width: 420px) {
  .wrap { width: calc(100% - 36px); }
  .hero-copy .eyebrow { font-size: 9px; gap: 9px; letter-spacing: .06em; }
  h1 { font-size: 43px; }
  .hero-lead { font-size: 15px; }
  .hero .actions { gap: 19px; }
  .button { min-height: 48px; padding: 11px 18px; font-size: 14px; gap: 17px; }
  .hero .text-link { font-size: 13px; gap: 12px; }
  .hero-meta { gap: 7px 12px; font-size: 10px; }
  .hero-visual { padding: 14px; }
  .visual-grid { padding-inline: 1px; }
  .tool-pills { gap: 7px; }
  .tool-pills span { font-size: 10px; }
  .gateway-card { padding: 12px; gap: 10px; }
  .gateway-card strong { font-size: 17px; }
  .gateway-mark { width: 40px; height: 40px; }
  .code-card pre { font-size: 10px; padding: 15px 12px; }
  .code-status { font-size: 8px; gap: 4px; padding-inline: 9px; }
  h2 { font-size: 31px; }
  .code-panel pre { font-size: 10px; padding: 22px 16px; }
  .closing-inner h2 { font-size: 36px; }
  .closing-inner .actions { gap: 10px; }
  .closing-inner .button { gap: 12px; padding-inline: 16px; font-size: 13px; }
  .footer-links { gap: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}