:root {
  --bg: #f2f4f7;
  --text: #1f2937;
  --muted: #667085;
  --brand: #1f3a5f;
  --brand-dark: #13253e;
  --card: #ffffff;
  --line: #d0d5dd;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(16, 24, 40, 0.05);
}

.nav-wrap {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-size: 22px;
  font-weight: 800;
  color: var(--brand-dark);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

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

.header-phone {
  font-weight: 800;
  color: var(--brand);
  white-space: nowrap;
}

.hero {
  padding: 72px 0 48px;
  background: linear-gradient(180deg, #eef2f6 0%, #f7f8fa 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  align-items: stretch;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 10px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #e4e7ec;
  color: #344054;
  font-size: 13px;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.2;
}

.hero-desc {
  margin: 16px 0 0;
  color: var(--muted);
  max-width: 680px;
}

.hero-cta {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 11px 18px;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: #163252;
}

.btn-light {
  background: #fff;
  border-color: var(--line);
  color: var(--text);
}

.btn-dark {
  background: var(--brand-dark);
  color: #fff;
}

.hero-stats {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.hero-stats li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
}

.hero-stats strong {
  display: block;
  font-size: 26px;
  line-height: 1.1;
  color: var(--brand-dark);
}

.hero-stats span {
  font-size: 13px;
  color: var(--muted);
}

.hero-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.08);
}

.hero-card h2 {
  margin: 0;
}

.hero-card ul {
  margin: 14px 0 20px;
  padding-left: 18px;
  color: var(--muted);
}

.section {
  padding: 66px 0;
}

.section-alt {
  background: #eceff3;
}

.section-tag {
  margin: 0;
  color: #475467;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 12px;
}

.section h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 3vw, 34px);
}

.section-intro {
  margin: 12px 0 0;
  color: var(--muted);
}

.cards {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

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

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

.cards.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  box-shadow: 0 4px 14px rgba(16, 24, 40, 0.04);
}

.card h3 {
  margin: 0;
  font-size: 20px;
}

.card p {
  margin: 10px 0 0;
  color: var(--muted);
}

.card-image {
  width: 100%;
  height: 170px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  margin-bottom: 10px;
}

.process-card {
  position: relative;
  overflow: hidden;
}

.step-no {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 700;
  color: #344054;
  background: #eaecf0;
  border-radius: 999px;
  padding: 2px 10px;
}

.dot-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 18px;
  align-items: stretch;
}

.about-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
}

.about-panel h3 {
  margin-top: 0;
}

.faq-list {
  margin-top: 22px;
  display: grid;
  gap: 10px;
}

.faq-list details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
}

.faq-list p {
  margin: 10px 0 0;
  color: var(--muted);
}

.logo-wall {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.logo-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #33415e;
  font-weight: 700;
  font-size: 14px;
}

.showcase-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.showcase-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
}

.showcase-media {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.showcase-card h3 {
  margin: 12px 0 0;
}

.showcase-card p {
  margin: 8px 0 0;
  color: var(--muted);
}

.gallery-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.gallery-grid img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}

.wechat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.wechat-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
}

.section-contact {
  background: #eceff3;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
}

.contact-phone {
  margin-top: 14px;
  font-size: 20px;
  font-weight: 700;
}

.contact-phone a {
  color: var(--brand-dark);
}

.site-footer {
  background: #101828;
  color: #d0d5dd;
}

.footer-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-wrap a {
  color: #f2f4f7;
  font-weight: 700;
}

.floating-phone {
  position: fixed;
  right: 16px;
  bottom: 18px;
  z-index: 20;
  background: #111827;
  color: #fff;
  border-radius: 999px;
  padding: 12px 16px;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(16, 24, 40, 0.28);
}

.floating-phone:hover {
  background: #1f2937;
}

@media (max-width: 1024px) {
  .cards.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid,
  .about-grid,
  .wechat-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav {
    display: none;
  }

  .hero {
    padding-top: 54px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .cards.three,
  .cards.two,
  .cards.four {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .logo-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .floating-phone {
    left: 12px;
    right: 12px;
    bottom: 12px;
    text-align: center;
  }
}