:root {
  color-scheme: light;
  --paper: #f7fafd;
  --white: #ffffff;
  --blue: #246bfd;
  --ink: #142d4e;
  --muted: #61758b;
  --pale: #e5eeff;
  --display-font: "Microsoft YaHei UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --body-font: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--body-font); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 6px; border-radius: 4px; }
svg { display: block; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { font-family: var(--display-font); }
.container { width: min(1200px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 10; top: 12px; left: 12px; padding: 12px 18px; background: var(--white); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.site-header { background: var(--paper); }
.header-inner { min-height: 104px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--pale); }
.brand { display: inline-flex; align-items: center; gap: 12px; font-family: var(--display-font); font-size: 27px; font-weight: 800; letter-spacing: 1px; }
.brand-mark { width: 38px; height: 38px; color: var(--blue); }
.main-nav { display: flex; align-items: center; gap: 40px; font-size: 14px; }
.main-nav a { padding-block: 14px; transition: color 160ms ease; }
.main-nav a:hover { text-decoration: underline; text-underline-offset: 6px; }
.hero-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 12px; padding-block: 64px 82px; }
.hero-copy { position: relative; z-index: 1; }
.hero-copy .eyebrow { color: var(--ink); }
.eyebrow { display: flex; align-items: center; gap: 9px; color: var(--blue); font-size: 13px; line-height: 1.6; font-weight: 700; letter-spacing: 1px; }
.status-dot { width: 6px; height: 6px; background: var(--blue); border-radius: 50%; }
h1 { margin-top: 25px; font-size: clamp(40px, 4.2vw, 60px); line-height: 1.4; font-weight: 800; letter-spacing: -2px; }
h1 span { color: var(--blue); }
.hero-description { max-width: 420px; margin-top: 24px; font-size: 16px; line-height: 1.95; color: var(--muted); }
.primary-button { display: inline-flex; align-items: center; justify-content: center; gap: 28px; margin-top: 34px; padding: 16px 24px; border: 1px solid var(--blue); border-radius: 8px; background: var(--blue); color: var(--white); font-size: 14px; font-weight: 700; transition: background-color 160ms ease, color 160ms ease; }
.primary-button svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.primary-button:hover { background: var(--white); color: var(--blue); }
.hero-visual { min-width: 0; }
.trajectory { width: 100%; height: auto; }
.hero-visual figcaption { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: -8px; color: var(--muted); font-size: 12px; letter-spacing: 1px; }
.hero-visual figcaption span { width: 22px; height: 1px; background: var(--muted); }
.section { padding-block: 76px; }
.services { background: var(--white); }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; margin-bottom: 36px; }
h2 { margin-top: 14px; font-size: 32px; font-weight: 700; line-height: 1.6; letter-spacing: -1px; }
.section-intro { flex-shrink: 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
.service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.service-card { padding: 30px; background: var(--paper); border: 1px solid var(--pale); border-radius: 14px; }
.service-icon { display: flex; align-items: center; justify-content: center; width: 50px; height: 50px; margin-bottom: 25px; color: var(--blue); background: var(--pale); border-radius: 12px; }
.service-icon svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.service-card h3 { font-size: 21px; font-weight: 700; }
.service-card > p { margin-top: 15px; color: var(--muted); font-size: 14px; line-height: 1.95; }
.service-card .service-detail { margin-top: 25px; padding-top: 20px; border-top: 1px solid var(--pale); color: var(--ink); font-size: 12px; }
.service-detail span { padding-inline: 8px; color: var(--muted); }
.about { padding-block: 68px; }
.about-panel { display: grid; grid-template-columns: .95fr 1.05fr; gap: 60px; padding: 48px; border-radius: 16px; background: var(--pale); }
.about-heading h2 { font-size: 30px; }
.about-heading .eyebrow { color: var(--ink); }
.about-copy { align-self: center; }
.about-copy h3 { font-size: 20px; line-height: 1.7; font-weight: 700; }
.about-copy p { margin-top: 16px; color: var(--ink); font-size: 14px; line-height: 1.95; }
.site-footer { background: var(--white); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 28px; padding-block: 34px; }
.footer-company { display: flex; align-items: center; gap: 22px; }
.footer-brand { font-family: var(--display-font); font-weight: 800; font-size: 19px; }
.footer-company p, .icp-link { color: var(--muted); font-size: 12px; line-height: 1.8; }
.icp-link { display: inline-flex; align-items: center; gap: 6px; flex-shrink: 0; }
.icp-link:hover { color: var(--blue); text-decoration: underline; text-underline-offset: 4px; }
.icp-link svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.3; stroke-linecap: round; stroke-linejoin: round; }

@media (max-width: 1000px) {
  .container { width: calc(100% - 64px); }
  .hero-layout { padding-block: 60px; }
  h1 { font-size: 42px; }
  .hero-description { font-size: 14px; }
  .hero-visual figcaption { font-size: 10px; letter-spacing: 0; }
  h2 { font-size: 27px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 14px; }
  .section-intro br { display: none; }
  .service-grid { gap: 14px; }
  .service-card { padding: 22px; }
  .service-card h3 { font-size: 18px; }
  .about-panel { padding: 36px; gap: 30px; }
  .about-heading h2 { font-size: 25px; }
  .about-copy h3 { font-size: 18px; }
  .footer-company { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (max-width: 700px) {
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 82px; }
  .brand { font-size: 22px; gap: 8px; }
  .brand-mark { width: 30px; height: 30px; }
  .main-nav { gap: 20px; font-size: 12px; }
  .hero-layout { grid-template-columns: 1fr; gap: 18px; padding-block: 44px 36px; }
  h1 { font-size: clamp(34px, 8.8vw, 48px); margin-top: 20px; letter-spacing: -1px; }
  .hero-description { margin-top: 20px; max-width: 390px; font-size: 14px; }
  .primary-button { margin-top: 26px; padding: 14px 22px; }
  .hero-visual { width: min(100%, 450px); margin-inline: auto; }
  .hero-visual figcaption { margin-top: -4px; font-size: 11px; }
  .section { padding-block: 48px; }
  h2 { font-size: 25px; letter-spacing: -.5px; }
  .section-heading { margin-bottom: 26px; }
  .section-intro { font-size: 13px; }
  .service-grid { grid-template-columns: 1fr; gap: 16px; }
  .service-card { padding: 26px; }
  .service-icon { margin-bottom: 20px; }
  .service-card h3 { font-size: 21px; }
  .service-card .service-detail { margin-top: 20px; padding-top: 16px; }
  .about-panel { grid-template-columns: 1fr; gap: 28px; padding: 30px 24px; }
  .about-heading h2 { font-size: 24px; }
  .about-copy h3 { font-size: 18px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 20px; padding-block: 28px; }
}

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