:root {
  color-scheme: light;
  --ink: #152033;
  --muted: #5d6b82;
  --line: #dce3ec;
  --paper: #ffffff;
  --soft: #f4f7fb;
  --navy: #0d1b2f;
  --blue: #2457d6;
  --teal: #0f8b8d;
  --gold: #c99322;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 7vw;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.25;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: #fff;
  background: var(--blue);
  border-radius: 7px;
  font-weight: 900;
}

.site-nav {
  flex: 0 0 auto;
  display: flex;
  gap: 30px;
  color: var(--muted);
  font-weight: 700;
}

.site-nav a {
  text-decoration: none;
}

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

.site-nav a[aria-current="page"] {
  color: var(--blue);
}

.hero {
  position: relative;
  display: grid;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 90px 7vw;
  overflow: hidden;
  color: #fff;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(13, 27, 47, 0.92), rgba(13, 27, 47, 0.55), rgba(13, 27, 47, 0.15)),
    linear-gradient(0deg, rgba(13, 27, 47, 0.35), rgba(13, 27, 47, 0.05));
}

.hero-content {
  position: relative;
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero h1,
.section h2,
.contact-section h2 {
  margin: 0;
  line-height: 1.16;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 720px;
  font-size: clamp(42px, 6vw, 76px);
}

.hero-copy {
  max-width: 680px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 20px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 7px;
  font-weight: 800;
  text-decoration: none;
}

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

.button.secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.55);
}

.section {
  padding: 84px 7vw;
}

.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: 56px;
  align-items: center;
  min-height: 620px;
  padding: 88px 7vw;
  color: #fff;
  background:
    linear-gradient(110deg, rgba(13, 27, 47, 0.97), rgba(36, 87, 214, 0.82)),
    url("https://images.unsplash.com/photo-1551434678-e076c223a692?auto=format&fit=crop&w=1800&q=85") center/cover;
}

.page-hero h1 {
  margin: 0;
  max-width: 780px;
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1.16;
  letter-spacing: 0;
}

.page-hero p {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 20px;
}

.product-preview {
  overflow: hidden;
  min-height: 390px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(16px);
}

.preview-topbar {
  display: flex;
  gap: 8px;
  align-items: center;
  height: 46px;
  padding: 0 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.preview-topbar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
}

.preview-grid {
  display: grid;
  grid-template-columns: 110px 1fr;
  min-height: 344px;
}

.preview-sidebar {
  border-right: 1px solid rgba(255, 255, 255, 0.18);
  background:
    linear-gradient(rgba(255, 255, 255, 0.2) 0 0) 22px 34px/58px 12px no-repeat,
    linear-gradient(rgba(255, 255, 255, 0.14) 0 0) 22px 74px/66px 12px no-repeat,
    linear-gradient(rgba(255, 255, 255, 0.14) 0 0) 22px 114px/54px 12px no-repeat,
    linear-gradient(rgba(255, 255, 255, 0.14) 0 0) 22px 154px/70px 12px no-repeat;
}

.preview-main {
  padding: 28px;
}

.preview-chart {
  height: 142px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(15, 139, 141, 0.9), rgba(36, 87, 214, 0.65)),
    repeating-linear-gradient(90deg, transparent 0 18px, rgba(255, 255, 255, 0.14) 18px 20px);
}

.preview-row {
  height: 14px;
  margin-top: 22px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.52);
}

.preview-row.short {
  width: 68%;
  margin-top: 12px;
  background: rgba(255, 255, 255, 0.32);
}

.preview-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 26px;
}

.preview-cards i {
  height: 76px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.22);
}

.muted {
  background: var(--soft);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

.section h2,
.contact-section h2 {
  font-size: clamp(32px, 4vw, 48px);
}

.intro-grid,
.split-section,
.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 48px;
  align-items: start;
}

.lead {
  margin-top: 0;
  font-size: 22px;
  font-weight: 800;
}

.metrics {
  display: grid;
  gap: 14px;
}

.metrics div,
.advantage-item,
.contact-panel {
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
}

.metrics div {
  padding: 22px;
}

.metrics strong {
  display: block;
  color: var(--blue);
  font-size: 30px;
  line-height: 1.2;
}

.metrics span,
.service-card p,
.advantage-item span,
.process-grid p,
.contact-section p {
  color: var(--muted);
}

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

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  min-height: 300px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.product-card.featured {
  background: #f8fbff;
  border-color: rgba(36, 87, 214, 0.28);
}

.product-card h3 {
  margin: 28px 0 12px;
  font-size: 26px;
}

.product-card p {
  color: var(--muted);
}

.product-card ul {
  display: grid;
  gap: 9px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.product-card li {
  position: relative;
  padding-left: 18px;
  color: var(--ink);
  font-weight: 700;
}

.product-card li::before {
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 7px;
  height: 7px;
  content: "";
  background: var(--teal);
  border-radius: 50%;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.scenario-grid div {
  min-height: 170px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.scenario-grid strong {
  display: block;
  margin-bottom: 12px;
  font-size: 21px;
}

.scenario-grid span {
  color: var(--muted);
}

.service-card {
  min-height: 236px;
  padding: 30px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.card-index {
  color: var(--teal);
  font-weight: 900;
}

.service-card h3 {
  margin: 34px 0 12px;
  font-size: 25px;
}

.split-copy {
  max-width: 520px;
}

.split-copy p:last-child {
  color: var(--muted);
}

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

.advantage-item {
  padding: 24px;
}

.advantage-item strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.process-section {
  border-top: 1px solid var(--line);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.process-grid div {
  padding: 26px 24px;
  background: #f9fbfd;
  border-left: 4px solid var(--blue);
}

.process-grid span {
  display: block;
  color: var(--gold);
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
}

.process-grid strong {
  display: block;
  margin-top: 18px;
  font-size: 20px;
}

.contact-section {
  padding: 80px 7vw;
  color: #fff;
  background: var(--navy);
}

.contact-section .eyebrow,
.contact-section p {
  color: rgba(255, 255, 255, 0.78);
}

.contact-panel {
  padding: 28px;
  color: var(--ink);
}

.contact-panel p {
  margin: 10px 0;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.contact-panel a {
  color: var(--blue);
  text-decoration: none;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 7vw;
  color: #d2dae6;
  background: #081223;
}

@media (max-width: 900px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding: 18px 6vw;
  }

  .site-nav {
    width: 100%;
    gap: 16px;
    overflow-x: auto;
    white-space: nowrap;
  }

  .brand {
    font-size: 18px;
  }

  .hero,
  .page-hero,
  .section,
  .contact-section {
    padding-left: 6vw;
    padding-right: 6vw;
  }

  .hero {
    min-height: 680px;
  }

  .intro-grid,
  .split-section,
  .contact-section,
  .service-grid,
  .product-grid,
  .page-hero,
  .scenario-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .page-hero {
    min-height: auto;
    padding-top: 70px;
    padding-bottom: 70px;
  }

  .product-preview {
    min-height: 340px;
  }

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

@media (max-width: 560px) {
  .hero h1 {
    font-size: 38px;
  }

  .hero-copy {
    font-size: 18px;
  }

  .button {
    width: 100%;
  }

  .page-hero p {
    font-size: 18px;
  }

  .preview-grid {
    grid-template-columns: 76px 1fr;
  }

  .preview-main {
    padding: 20px;
  }

  .preview-cards {
    grid-template-columns: 1fr;
  }
}