:root {
  --color-primary: #1268d8;
  --color-primary-dark: #0b3d75;
  --color-accent: #16a3c7;
  --color-bg: #ffffff;
  --color-muted: #f3f7fb;
  --color-text: #1f2937;
  --color-subtle: #64748b;
  --color-line: #d9e3ef;
  --color-dark: #111827;
  --shadow: 0 18px 45px rgba(15, 41, 77, 0.12);
  --radius: 8px;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(217, 227, 239, 0.85);
  backdrop-filter: blur(14px);
}

.navbar {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

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

.brand-mark {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius);
}

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

.brand strong {
  color: var(--color-dark);
  font-size: 18px;
  line-height: 1.2;
}

.brand small {
  margin-top: 2px;
  color: var(--color-subtle);
  font-size: 12px;
  line-height: 1.2;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.nav-menu a {
  color: #334155;
  transition: color 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a:focus,
.nav-menu a.is-active {
  color: var(--color-primary);
}

.nav-contact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  color: #fff !important;
  background: var(--color-primary);
  border-radius: var(--radius);
}

.nav-contact.is-active {
  color: #fff !important;
  background: var(--color-primary-dark);
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  background: var(--color-muted);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.language-switcher button {
  min-height: 32px;
  padding: 0 10px;
  color: #334155;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  background: transparent;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.language-switcher button:hover,
.language-switcher button:focus,
.language-switcher button.is-active {
  color: #fff;
  background: var(--color-primary);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  cursor: pointer;
}

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

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 86px;
  color: #fff;
  background:
    linear-gradient(120deg, rgba(8, 33, 67, 0.96), rgba(14, 88, 164, 0.88)),
    radial-gradient(circle at 80% 20%, rgba(22, 163, 199, 0.42), transparent 34%),
    #0b2342;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -36% 48%;
  height: 380px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0));
  transform: rotate(-12deg);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: 56px;
  align-items: center;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.15;
  letter-spacing: 0;
}

.hero-text {
  max-width: 680px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 700;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn:hover,
.btn:focus {
  transform: translateY(-2px);
}

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

.btn-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.08);
}

.hero-panel {
  padding: 22px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-hero {
  color: #fff;
  background:
    linear-gradient(120deg, rgba(8, 33, 67, 0.98), rgba(14, 88, 164, 0.9)),
    radial-gradient(circle at 78% 16%, rgba(22, 163, 199, 0.34), transparent 34%),
    #0b2342;
}

.page-hero-inner {
  max-width: 860px;
  padding: 78px 0 72px;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 54px);
  line-height: 1.15;
}

.page-hero p:last-child {
  max-width: 760px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
}

.panel-header {
  display: flex;
  gap: 8px;
  margin-bottom: 22px;
}

.panel-header span {
  width: 10px;
  height: 10px;
  background: rgba(255, 255, 255, 0.55);
  border-radius: 50%;
}

.metric-card,
.metric-row > div {
  padding: 20px;
  background: rgba(255, 255, 255, 0.13);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
}

.metric-card strong,
.metric-row strong {
  display: block;
  font-size: 26px;
  line-height: 1.2;
}

.metric-card span,
.metric-row span {
  color: rgba(255, 255, 255, 0.74);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 14px;
}

.signal-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 16px;
}

.signal-list span {
  padding: 9px 12px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.08);
  border-left: 3px solid var(--color-accent);
  border-radius: 4px;
  font-size: 14px;
}

.section {
  padding: 84px 0;
}

.section-muted {
  background: var(--color-muted);
}

.split {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.section h2,
.contact-card h2 {
  margin: 0;
  color: var(--color-dark);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
  letter-spacing: 0;
}

.section-copy p,
.section-heading p,
.contact-card p {
  color: var(--color-subtle);
}

.section-copy p:first-child {
  margin-top: 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 36px;
}

.section-heading h2 {
  margin-bottom: 12px;
}

.card-grid {
  display: grid;
  gap: 20px;
}

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

.card {
  min-height: 240px;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(15, 41, 77, 0.06);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.detail-card {
  min-height: 210px;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(15, 41, 77, 0.06);
}

.detail-card h3,
.service-detail h2,
.statement-block h2 {
  margin: 0 0 12px;
  color: var(--color-dark);
  line-height: 1.3;
}

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

.detail-card p,
.service-detail p,
.statement-block p {
  margin: 0;
  color: var(--color-subtle);
}

.statement-block {
  max-width: 860px;
}

.statement-block p:last-child {
  margin-top: 16px;
  font-size: 18px;
}

.service-detail-list {
  display: grid;
  gap: 18px;
}

.service-detail {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  padding: 30px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(15, 41, 77, 0.06);
}

.service-detail .card-icon {
  margin-bottom: 0;
}

.service-detail h2 {
  font-size: 28px;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 10px 12px;
  color: #334155;
  background: var(--color-muted);
  border-left: 3px solid var(--color-primary);
  border-radius: 4px;
  font-size: 14px;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 22px;
  color: var(--color-primary);
  font-weight: 800;
  background: #e9f2ff;
  border-radius: var(--radius);
}

.card h3,
.case-item h3,
.advantage-item h3 {
  margin: 0 0 10px;
  color: var(--color-dark);
  font-size: 20px;
  line-height: 1.35;
}

.card p,
.case-item p,
.advantage-item p {
  margin: 0;
  color: var(--color-subtle);
}

.case-list {
  display: grid;
  gap: 16px;
}

.case-item {
  display: grid;
  grid-template-columns: 150px 1fr 1.5fr;
  gap: 22px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
}

.case-item span {
  color: var(--color-primary);
  font-weight: 800;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--color-line);
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
}

.advantage-item {
  padding: 28px;
  border-right: 1px solid var(--color-line);
}

.advantage-item:last-child {
  border-right: 0;
}

.contact-section {
  background:
    linear-gradient(90deg, rgba(18, 104, 216, 0.08), rgba(22, 163, 199, 0.06)),
    #fff;
}

.contact-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: center;
  padding: 42px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-info {
  padding: 26px;
  background: var(--color-muted);
  border-radius: var(--radius);
}

.contact-info p {
  margin: 0 0 12px;
}

.contact-info p:last-child {
  margin-bottom: 0;
}

.site-footer {
  padding: 28px 0;
  color: rgba(255, 255, 255, 0.72);
  background: var(--color-dark);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 980px) {
  .hero-grid,
  .split,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .services-grid,
  .advantage-grid,
  .detail-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .check-list {
    grid-template-columns: 1fr;
  }

  .advantage-item:nth-child(2) {
    border-right: 0;
  }

  .advantage-item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--color-line);
  }

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

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: var(--header-height);
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

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

  .nav-menu a {
    display: block;
    padding: 12px 10px;
  }

  .nav-contact {
    margin-top: 6px;
  }

  .language-switcher {
    margin-left: auto;
  }
}

@media (max-width: 760px) {
  :root {
    --header-height: 68px;
  }

  .container {
    width: min(100% - 28px, 1120px);
  }

  .brand small {
    display: none;
  }

  .hero {
    padding: 64px 0;
  }

  .page-hero-inner {
    padding: 58px 0 54px;
  }

  .hero h1 {
    font-size: 34px;
  }

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

  .hero-panel {
    padding: 16px;
  }

  .metric-row,
  .signal-list,
  .services-grid,
  .advantage-grid,
  .detail-grid,
  .service-detail {
    grid-template-columns: 1fr;
  }

  .service-detail {
    gap: 18px;
    padding: 24px;
  }

  .section {
    padding: 62px 0;
  }

  .card {
    min-height: auto;
  }

  .advantage-item,
  .advantage-item:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .advantage-item:last-child {
    border-bottom: 0;
  }

  .contact-card {
    padding: 26px;
  }

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

@media (max-width: 520px) {
  .navbar {
    flex-wrap: wrap;
  }

  .language-switcher {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .nav-toggle {
    margin-left: auto;
  }
}