:root { color-scheme: light; --brand: #009eff; --ink: #0f2744; --muted: #64748b; --line: #dfe7ef; --surface: #f5f8fb; --accent: #0077c8; --accent-hover: #005f9f; }
* { box-sizing: border-box; }
html { scroll-padding-top: 100px; scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif; font-size: 15px; line-height: 1.75; letter-spacing: 0; overflow-wrap: anywhere; }
[hidden] { display: none !important; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; letter-spacing: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin: 0; }
.page-width { width: min(1200px, calc(100% - 80px)); margin-inline: auto; }
.icon { width: 18px; height: 18px; flex: 0 0 18px; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 22px; padding: 10px 24px; border: 1px solid transparent; border-radius: 3px; font-size: 15px; font-weight: 500; line-height: 1.6; white-space: nowrap; transition: background-color 150ms; }
.button-primary { color: #fff; background: var(--accent); border-color: var(--accent); }
.button-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.button-primary .icon { filter: brightness(0) invert(1); }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: #fff; }
.header-inner { min-height: 74px; display: flex; align-items: center; gap: 48px; }
.brand { flex: 0 0 auto; }
.brand img { width: 150px; height: auto; }
.main-nav { display: flex; align-items: center; gap: 34px; font-size: 14px; }
.main-nav a:hover { color: var(--accent); }
.header-entry { margin-left: auto; min-height: 40px; padding: 8px 20px; font-size: 14px; }
.hero { position: relative; background: #f4f9fd; isolation: isolate; touch-action: pan-y; }
.hero-stage { position: relative; height: 500px; }
.hero-slide { position: absolute; inset: 0; overflow: hidden; animation: arrive 280ms ease-out; }
.hero-art { position: absolute; inset: 0; z-index: -1; width: 100%; height: 100%; object-fit: cover; object-position: center 52%; }
.hero-inner { height: 100%; display: flex; align-items: flex-start; padding-top: 66px; }
.hero-copy { width: 56%; max-width: 650px; }
.eyebrow { color: var(--muted); font-size: 13px; line-height: 1.6; font-weight: 500; }
.hero-title { margin-top: 13px; font-size: 44px; font-weight: 600; line-height: 1.35; }
.hero-subtitle { margin-top: 13px; font-size: 23px; line-height: 1.6; font-weight: 500; }
.hero-description { margin-top: 16px; color: var(--muted); font-size: 16px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; margin-top: 28px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; }
.text-link:hover { color: var(--accent); }
.text-link .icon { width: 16px; height: 16px; }
.carousel-controls { position: absolute; bottom: 20px; inset-inline: 0; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.slide-tabs { display: flex; align-items: center; gap: 26px; }
.slide-tab { display: flex; align-items: center; gap: 9px; min-height: 44px; padding: 10px 0; background: none; border: 0; border-bottom: 2px solid transparent; color: #67717e; font-size: 14px; white-space: nowrap; }
.slide-tab span { font-size: 11px; font-variant-numeric: tabular-nums; }
.slide-tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--brand); font-weight: 600; }
.carousel-navigation { display: flex; align-items: center; gap: 8px; }
.slide-counter { display: flex; align-items: center; gap: 10px; margin-right: 13px; color: #737d89; font-size: 12px; font-variant-numeric: tabular-nums; }
.slide-counter b { color: var(--ink); font-size: 15px; font-weight: 500; }
.icon-button { display: grid; place-items: center; width: 34px; height: 34px; padding: 7px; border: 1px solid #d2d9e2; border-radius: 3px; background: #ffffffd9; }
.icon-button:hover { background: #fff; border-color: #92a0b2; }
.overview-band { border-bottom: 1px solid var(--line); }
.overview-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); padding-block: 22px; }
.overview-grid > a { display: flex; align-items: center; gap: 16px; min-width: 0; padding: 1px 28px; border-right: 1px solid var(--line); }
.overview-grid > a:first-child { padding-left: 0; }
.overview-grid > a:last-child { padding-right: 0; border: 0; }
.overview-grid > a > img { flex: 0 0 28px; }
.overview-grid h2 { font-size: 16px; font-weight: 500; line-height: 1.6; }
.overview-grid p { margin-top: 3px; font-size: 12px; color: var(--muted); }
.overview-grid .overview-arrow { flex: 0 0 16px; margin-left: auto; opacity: .6; }
.overview-grid > a:hover h2 { color: var(--accent); }
.highlights-section { padding-block: 64px 60px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 36px; margin-bottom: 36px; }
.section-heading h2 { margin-top: 8px; font-size: 29px; line-height: 1.5; font-weight: 500; }
.section-heading > p { color: var(--muted); font-size: 14px; flex-shrink: 0; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.feature { padding: 4px 26px; border-left: 1px solid var(--line); scroll-margin-top: 20px; }
.feature:first-child { padding-left: 0; border: 0; }
.feature:last-child { padding-right: 0; }
.feature > img { margin-bottom: 18px; }
.feature h3 { margin-bottom: 12px; font-size: 18px; font-weight: 500; }
.feature > p { color: var(--muted); font-size: 14px; line-height: 1.85; }
.feature ul { list-style: none; margin: 18px 0 0; padding: 0; font-size: 12px; color: #475362; }
.feature li { position: relative; padding-left: 12px; margin-top: 6px; }
.feature li::before { position: absolute; left: 0; top: 10px; content: ""; width: 4px; height: 4px; background: var(--brand); }
.collaboration-band { padding-block: 44px; background: var(--surface); border-block: 1px solid #eff1f5; }
.collaboration-inner { display: grid; grid-template-columns: 260px minmax(0, 1fr); align-items: center; gap: 42px; }
.collaboration-heading h2 { margin-top: 9px; font-size: 25px; line-height: 1.65; font-weight: 500; }
.workflow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; list-style: none; padding: 0; margin: 0; }
.workflow li { position: relative; min-width: 0; padding-top: 10px; }
.workflow li:not(:last-child)::after { content: ""; position: absolute; top: 29px; left: 42px; right: 0; border-top: 1px solid #d9dfe8; }
.workflow span { font-size: 20px; color: var(--accent); font-weight: 500; font-variant-numeric: tabular-nums; }
.workflow h3 { font-size: 16px; margin-top: 14px; font-weight: 500; }
.workflow p { font-size: 12px; margin-top: 5px; color: var(--muted); }
.entry-band { padding-block: 40px; }
.entry-inner { display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.entry-inner h2 { font-size: 25px; line-height: 1.5; font-weight: 500; text-wrap: balance; }
.entry-inner p { font-size: 14px; margin-top: 9px; color: var(--muted); }
.entry-inner .button { min-width: 170px; flex-shrink: 0; }
.site-footer { padding-block: 28px 18px; background: var(--surface); border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-about { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-name { color: var(--ink); font-size: 14px; margin-bottom: 6px; }
.access-note { display: flex; align-items: center; gap: 8px; }
.service-scope { margin-top: 14px; font-size: 11px; }
.footer-bottom { margin-top: 20px; padding-top: 15px; border-top: 1px solid var(--line); display: flex; gap: 20px; justify-content: space-between; font-size: 11px; }
.footer-bottom a:hover { color: var(--accent); text-decoration: underline; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 30; padding: 8px 16px; background: #fff; border: 1px solid var(--line); }
.skip-link:focus { top: 10px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
@keyframes arrive { from { opacity: .55; } to { opacity: 1; } }
@media (min-width: 1600px) {
  .hero-art { object-position: center 52%; }
  .hero-stage { height: 530px; }
  .hero-inner { padding-top: 76px; }
}
@media (max-width: 1100px) {
  .page-width { width: calc(100% - 56px); }
  .header-inner { gap: 30px; }
  .main-nav { gap: 25px; }
  .hero-title { font-size: 36px; }
  .hero-subtitle { font-size: 21px; }
  .hero-description { font-size: 14px; }
  .hero-copy { width: 58%; }
  .hero-art { object-position: 46% center; }
  .overview-grid > a { padding-inline: 20px; gap: 12px; }
  .overview-grid .overview-arrow { display: none; }
  .section-heading h2 { font-size: 26px; }
  .feature { padding-inline: 20px; }
  .collaboration-inner { grid-template-columns: 220px minmax(0, 1fr); gap: 30px; }
  .workflow { gap: 18px; }
}
@media (max-width: 800px) {
  .page-width { width: calc(100% - 40px); }
  .header-inner { min-height: 68px; }
  .brand img { width: 132px; }
  .main-nav { display: none; }
  .hero-stage { height: 470px; }
  .hero-inner { padding-top: 48px; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 19px; }
  .hero-copy { width: 65%; }
  .hero-actions { gap: 20px; }
  .hero-actions .button { padding-inline: 17px; }
  .overview-grid { gap: 16px; }
  .overview-grid > a { padding: 0 16px 0 0; align-items: flex-start; gap: 10px; }
  .overview-grid > a > img { width: 22px; flex-basis: 22px; }
  .overview-grid h2 { font-size: 14px; }
  .overview-grid p { font-size: 11px; }
  .section-heading { align-items: flex-start; }
  .section-heading > p { display: none; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 0; }
  .feature { padding-inline: 24px; }
  .feature:nth-child(odd) { border: 0; padding-left: 0; }
  .feature:nth-child(even) { padding-right: 0; }
  .collaboration-inner { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .collaboration-heading h2 br { display: none; }
  .entry-inner h2 { font-size: 22px; }
  .footer-about { flex-direction: column; align-items: flex-start; gap: 12px; }
}
@media (max-width: 540px) {
  html { scroll-padding-top: 84px; }
  .page-width { width: calc(100% - 36px); }
  .header-inner { min-height: 64px; gap: 12px; }
  .brand img { width: 120px; }
  .header-entry { min-height: 36px; font-size: 12px; gap: 12px; padding: 7px 13px; }
  .hero-stage { height: 490px; }
  .hero-inner { padding-top: 30px; }
  .hero-copy { width: 100%; max-width: 100%; }
  .hero-art { top: auto; bottom: 32px; width: 100%; height: 260px; object-fit: cover; object-position: right center; opacity: .7; }
  .hero-title { margin-top: 10px; font-size: 28px; }
  .hero-subtitle { margin-top: 8px; font-size: 18px; }
  .hero-description { font-size: 13px; margin-top: 12px; line-height: 1.8; }
  .eyebrow { font-size: 11px; }
  .hero-actions { margin-top: 20px; flex-wrap: nowrap; gap: 16px; }
  .hero-actions .button { min-height: 42px; padding: 9px 15px; font-size: 13px; gap: 12px; }
  .hero-actions .text-link { font-size: 12px; gap: 0; }
  .carousel-controls { bottom: 16px; flex-wrap: wrap; gap: 8px; }
  .slide-tabs { justify-content: space-between; width: 100%; gap: 8px; }
  .slide-tab { min-height: 38px; padding: 7px 0; font-size: 12px; gap: 6px; }
  .slide-tab span { font-size: 10px; }
  .carousel-navigation { justify-content: flex-end; width: 100%; gap: 8px; }
  .icon-button { width: 30px; height: 30px; padding: 5px; }
  .slide-counter { font-size: 10px; margin-right: 4px; }
  .slide-counter b { font-size: 12px; }
  .overview-grid { padding-block: 18px; gap: 10px; }
  .overview-grid > a { flex-direction: column; gap: 8px; padding-right: 10px; }
  .overview-grid p { display: none; }
  .overview-grid h2 { font-size: 12px; }
  .overview-grid > a > img { width: 23px; height: 23px; }
  .highlights-section { padding-block: 36px; }
  .section-heading { margin-bottom: 28px; }
  .section-heading h2 { font-size: 23px; }
  .feature { padding-inline: 17px; }
  .feature h3 { font-size: 16px; margin-bottom: 9px; }
  .feature > img { width: 28px; height: 28px; margin-bottom: 14px; }
  .feature > p { font-size: 12px; }
  .feature ul { font-size: 11px; margin-top: 12px; }
  .feature li { padding-left: 10px; }
  .collaboration-band { padding-block: 30px; }
  .collaboration-heading h2 { font-size: 22px; }
  .workflow { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 24px; }
  .workflow li:nth-child(2)::after { display: none; }
  .workflow h3 { font-size: 15px; margin-top: 8px; }
  .workflow p { font-size: 11px; }
  .entry-band { padding-block: 30px; }
  .entry-inner { flex-direction: column; align-items: flex-start; gap: 22px; }
  .entry-inner h2 { font-size: 22px; }
  .entry-inner p { font-size: 12px; }
  .entry-inner .button { min-height: 42px; font-size: 13px; }
  .site-footer { font-size: 11px; padding-top: 24px; }
  .footer-name { font-size: 13px; }
  .footer-bottom { flex-direction: column; gap: 7px; }
}
@media (max-height: 550px) and (min-width: 541px) {
  .hero-stage { height: 310px; }
  .hero-inner { padding-top: 22px; }
  .hero-title { font-size: 28px; margin-top: 4px; }
  .hero-subtitle { margin-top: 4px; font-size: 17px; }
  .hero-description { margin-top: 6px; font-size: 12px; line-height: 1.6; }
  .hero-actions { margin-top: 12px; }
  .hero-actions .button { min-height: 36px; padding-block: 6px; font-size: 13px; }
  .carousel-controls { bottom: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}