:root {
  --bg: #f7fafc;
  --surface: #ffffff;
  --surface-soft: #edf7fb;
  --ink: #142033;
  --muted: #5d6d7f;
  --line: #dbe6ef;
  --blue: #1264d8;
  --blue-dark: #0d3d8f;
  --cyan: #10b7d8;
  --green: #0f766e;
  --navy: #0f1b2d;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 5vw;
  color: var(--ink);
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  color: var(--ink);
  font-size: 17px;
  line-height: 1.2;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}

.nav a {
  padding: 24px 0;
}

.nav a:hover {
  color: var(--blue-dark);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  align-items: center;
  gap: 48px;
  padding: 72px 5vw 80px;
  background: linear-gradient(180deg, #ffffff 0%, #edf7fb 100%);
}

.hero-image {
  width: min(520px, 42vw);
  height: auto;
  min-height: 360px;
  justify-self: end;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(18, 32, 51, 0.16);
}

.hero-content {
  width: min(720px, 100%);
  color: var(--ink);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(36px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-copy {
  width: min(610px, 100%);
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-metrics span {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  min-height: 42px;
  padding: 0 14px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero-metrics strong {
  color: var(--blue-dark);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 700;
}

.primary-action {
  color: #fff;
  background: var(--blue);
}

.primary-action:hover {
  background: var(--blue-dark);
}

.secondary-action {
  color: var(--blue-dark);
  border-color: rgba(18, 100, 216, 0.24);
  background: #fff;
}

.section {
  padding: 88px 5vw;
}

.section-heading {
  width: min(760px, 100%);
  margin-bottom: 34px;
}

.section h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  letter-spacing: 0;
}

.policy-page {
  min-height: calc(100vh - 150px);
  padding-top: 76px;
}

.policy-page h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.1;
  letter-spacing: 0;
}

.intro-grid,
.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.intro-grid article,
.capability-card,
.contact-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
}

.intro-grid span,
.timeline-list span {
  color: var(--blue);
  font-weight: 800;
}

h3 {
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.28;
}

p {
  margin: 0;
  color: var(--muted);
}

.split {
  background: #eef3f8;
}

.service-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.service-list article {
  min-height: 190px;
  padding: 30px;
  background: #fff;
}

.timeline-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.timeline-list article {
  min-height: 230px;
}

.timeline-list span {
  display: inline-flex;
  margin-bottom: 18px;
}

.capability-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.capability-card {
  min-height: 188px;
}

.cases {
  background: var(--navy);
  color: #fff;
}

.cases .section-heading h2,
.cases .case-table strong {
  color: #fff;
}

.case-table {
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.case-table div {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.case-table span {
  color: rgba(255, 255, 255, 0.72);
}

.about-body {
  width: min(920px, 100%);
}

.about-body p + p {
  margin-top: 18px;
}

.contact {
  background: #eef3f8;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(280px, 720px);
  gap: 24px;
}

.notice {
  margin-top: 18px;
  color: var(--green);
  font-size: 14px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 5vw;
  color: rgba(255, 255, 255, 0.84);
  background: var(--navy);
}

.site-footer p {
  color: rgba(255, 255, 255, 0.62);
}

.copyright {
  margin-top: 6px;
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
}

@media (max-width: 900px) {
  .site-header {
    min-height: 64px;
  }

  .brand small {
    white-space: normal;
  }

  .nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 10px 5vw 18px;
    background: #fff;
    border-bottom: 1px solid var(--line);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 12px 0;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 56px;
  }

  .hero-image {
    width: 100%;
    min-height: 280px;
    justify-self: stretch;
  }

  .intro-grid,
  .capability-grid,
  .service-list,
  .timeline-list,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .case-table div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-footer {
    flex-direction: column;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 1180px) and (min-width: 901px) {
  .timeline-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .brand strong {
    font-size: 15px;
  }

  .brand small {
    display: none;
  }

  .brand-logo {
    width: 38px;
    height: 38px;
  }

  .hero {
    padding: 44px 5vw 60px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .hero-metrics span {
    width: 100%;
  }

  .section {
    padding: 64px 5vw;
  }
}