:root {
  --ink: #142033;
  --muted: #5f6c7d;
  --line: #d9e1ea;
  --bg: #f5f7fa;
  --soft: #eef3f8;
  --navy: #10233f;
  --blue: #1467b3;
  --cyan: #18a6c8;
  --gold: #d4a64a;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(16, 35, 63, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  background: var(--white);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(217, 225, 234, 0.85);
  backdrop-filter: blur(16px);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  min-height: 74px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--white);
  font-weight: 800;
  letter-spacing: 1px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--navy), var(--blue));
}

.brand strong {
  display: block;
  font-size: 16px;
  line-height: 1.2;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
  color: #2f3d4f;
  font-size: 15px;
}

.nav-menu a {
  white-space: nowrap;
}

.nav-cta {
  padding: 10px 16px;
  color: var(--white);
  border-radius: 6px;
  background: var(--blue);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 680px;
  overflow: hidden;
  color: var(--white);
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(13, 26, 47, 0.9) 0%, rgba(13, 26, 47, 0.68) 42%, rgba(13, 26, 47, 0.18) 100%),
    linear-gradient(180deg, rgba(13, 26, 47, 0.15), rgba(13, 26, 47, 0.34));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 150px 0 110px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero p:not(.eyebrow) {
  max-width: 640px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 22px;
  border: 0;
  border-radius: 6px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.button.primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 14px 30px rgba(20, 103, 179, 0.25);
}

.button.secondary {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.1);
}

.section-band {
  width: min(1180px, calc(100% - 32px));
  margin: -70px auto 0;
  position: relative;
  z-index: 3;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.stat {
  padding: 30px;
  border-right: 1px solid var(--line);
}

.stat:last-child {
  border-right: 0;
}

.stat strong {
  display: block;
  color: var(--blue);
  font-size: 32px;
  line-height: 1.1;
}

.stat span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 96px 0;
}

.section-muted,
.section-dark {
  width: 100%;
  padding-left: max(16px, calc((100% - 1180px) / 2));
  padding-right: max(16px, calc((100% - 1180px) / 2));
}

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

.section-dark {
  color: var(--white);
  background: linear-gradient(135deg, var(--navy), #071225);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 40px;
}

.section-heading.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.18;
  letter-spacing: 0;
}

.section-intro {
  margin: 18px auto 0;
  max-width: 820px;
  color: rgba(255, 255, 255, 0.76);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 42px;
  align-items: start;
}

.about-copy {
  color: #344256;
  font-size: 18px;
}

.about-copy p {
  margin: 0 0 18px;
}

.about-panel {
  padding: 30px;
  border-radius: 8px;
  background: var(--soft);
  border: 1px solid var(--line);
}

.about-panel h3 {
  margin: 0 0 16px;
  font-size: 22px;
}

.about-panel ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.about-panel li + li {
  margin-top: 10px;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.media-card {
  overflow: hidden;
  border-radius: 8px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(16, 35, 63, 0.08);
}

.media-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.media-card div {
  padding: 28px;
}

.media-card h3,
.solution-item h3,
.case-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.media-card p,
.solution-item p,
.case-card p {
  margin: 0;
  color: var(--muted);
}

.text-card {
  padding: 34px;
}

.card-number {
  display: inline-block;
  margin-bottom: 40px;
  color: var(--gold);
  font-size: 44px;
  font-weight: 800;
}

.solution-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 44px;
  align-items: stretch;
}

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

.solution-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.solution-item span {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: var(--white);
  font-weight: 800;
  border-radius: 8px;
  background: var(--navy);
}

.quote-box {
  display: flex;
  align-items: end;
  min-height: 420px;
  padding: 34px;
  color: var(--white);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(16, 35, 63, 0.1), rgba(16, 35, 63, 0.88)),
    url("../images/station-lcd-media.png") center / cover;
  box-shadow: var(--shadow);
}

.quote-box p {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.35;
}

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

.case-card {
  min-height: 220px;
  padding: 30px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.case-card p {
  color: rgba(255, 255, 255, 0.72);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 32px max(16px, calc((100% - 1180px) / 2));
  color: rgba(255, 255, 255, 0.72);
  background: #081120;
}

.site-footer strong {
  color: var(--white);
}

.site-footer p {
  margin: 4px 0 0;
}

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

  .nav-menu {
    position: absolute;
    top: 74px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

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

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

  .hero {
    min-height: 620px;
  }

  .hero-content {
    padding-top: 120px;
  }

  .stats,
  .about-grid,
  .media-grid,
  .solution-layout,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .stats {
    margin-top: -40px;
  }

  .stat {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stat:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 72px 0;
  }

  .section-muted,
  .section-dark {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .quote-box {
    min-height: 300px;
  }
}

@media (max-width: 560px) {
  .brand strong {
    font-size: 14px;
  }

  .brand small {
    display: none;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero p:not(.eyebrow) {
    font-size: 17px;
  }

  .about-panel,
  .text-card {
    padding: 24px;
  }

  .site-footer {
    display: block;
  }

  .site-footer a {
    display: inline-block;
    margin-top: 16px;
  }
}