:root {
  --bg: #0b0f1a;
  --bg-soft: #111827;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --text: #f5f7fb;
  --text-muted: #a3aab9;
  --accent: #46d0ff;
  --accent-2: #f4b33b;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-soft: #e9edf5;
  --surface: #ffffff;
  --surface-strong: #f1f5ff;
  --text: #0b1020;
  --text-muted: #5a6375;
  --accent: #1a73e8;
  --accent-2: #f49a1b;
  --border: rgba(10, 16, 32, 0.12);
  --shadow: 0 18px 40px rgba(17, 24, 39, 0.12);
}

* {
  box-sizing: border-box;
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #1a2340 0%, #0b0f1a 55%, #070b12 100%);
  line-height: 1.6;
  scroll-behavior: smooth;
}

[data-theme="light"] body {
  background: radial-gradient(circle at top, #ffffff 0%, #f1f4fa 55%, #e6ebf5 100%);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-parallax] {
  transform: translateY(var(--parallax-y, 0));
  transition: transform 0.2s ease;
}

.cards .card,
.solutions .solution,
.case-card,
.news-item,
.contact-card,
.qual-card,
.subsidiary-card,
.about-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.cards .card:hover,
.solutions .solution:hover,
.case-card:hover,
.news-item:hover,
.contact-card:hover,
.qual-card:hover,
.subsidiary-card:hover,
.about-card:hover {
  transform: translateY(-6px);
  border-color: rgba(70, 208, 255, 0.35);
  box-shadow: var(--shadow);
}

[data-parallax].subsidiary-card:hover {
  transform: translateY(calc(var(--parallax-y, 0) - 6px));
}

[data-theme="light"] body {
  background: radial-gradient(circle at top, #ffffff 0%, #f1f4fa 55%, #e6ebf5 100%);
}

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(10, 15, 26, 0.8);
  border-bottom: 1px solid var(--border);
}

[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.86);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

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

.logo-mark {
  width: 44px;
  height: 44px;
  display: block;
  object-fit: contain;
}

.logo-text .cn {
  font-weight: 600;
  font-size: 16px;
}

.logo-text .en {
  font-size: 12px;
  color: var(--text-muted);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.lang-toggle,
.theme-toggle {
  background: var(--surface-strong);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
}

.hero {
  padding: 80px 0 60px;
}

.hero-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 6px 12px;
  background: rgba(70, 208, 255, 0.16);
  border: 1px solid rgba(70, 208, 255, 0.4);
  color: var(--accent);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.8px;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  margin: 16px 0;
}

.hero p {
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 22px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), #4b75ff);
  color: #0b0f1a;
  box-shadow: var(--shadow);
}

.btn.ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

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

.hero-visual {
  display: flex;
  justify-content: center;
}

.grid-card {
  width: min(420px, 100%);
  height: 320px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  border-radius: 20px;
  position: relative;
  padding: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.grid-line {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
      90deg,
      transparent,
      transparent 30px,
      rgba(255, 255, 255, 0.06) 30px,
      rgba(255, 255, 255, 0.06) 31px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 30px,
      rgba(255, 255, 255, 0.06) 30px,
      rgba(255, 255, 255, 0.06) 31px
    );
  opacity: 0.4;
}

.grid-card .stat {
  position: relative;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 16px;
  margin-bottom: 12px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
}

.stat-value {
  font-size: 24px;
  font-weight: 600;
}

.section {
  padding: 70px 0;
}

.section.alt {
  background: rgba(255, 255, 255, 0.02);
}

.section-header {
  margin-bottom: 36px;
}

.section-header h2 {
  margin: 0 0 8px;
  font-size: clamp(22px, 3vw, 32px);
}

.section-header p {
  color: var(--text-muted);
  margin: 0;
}

#subsidiary .section-header {
  margin-bottom: 4px;
}

#subsidiary .section-header p {
  line-height: 1.35;
}

#subsidiary .subsidiary-info p {
  line-height: 1.45;
}

#qualifications.section {
  margin-top: 56px;
}


.about-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
}

.about-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.meta-item {
  padding: 12px;
  background: var(--surface-strong);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.cards,
.solutions,
.case-grid,
.qualifications,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.subsidiary-card {
  display: grid;
  grid-template-columns: minmax(200px, 0.8fr) minmax(220px, 1.2fr) minmax(160px, 0.8fr);
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
}

.subsidiary-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.subsidiary-logo img {
  width: 160px;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  background: #0b0f1a;
  padding: 10px;
  border: 1px solid var(--border);
}

.subsidiary-list {
  margin: 16px 0 0;
  padding-left: 18px;
  color: var(--text-muted);
}

.subsidiary-link {
  display: grid;
  place-items: center;
}

@media (max-width: 860px) {
  .subsidiary-card {
    grid-template-columns: 1fr;
  }
}

.partners-tools {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}

.partners-search {
  width: 100%;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 14px;
}

.partners-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  background: var(--surface-strong);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
}

.filter-btn.active {
  color: #0b0f1a;
  background: var(--accent);
  border-color: transparent;
}

.scroll-list {
  max-height: 360px;
  overflow: auto;
  padding-right: 6px;
}

.scroll-list::-webkit-scrollbar {
  width: 8px;
}

.scroll-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 8px;
}

.partner-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--text);
}

.card,
.solution,
.case-card,
.qual-card,
.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
}

.contact-link {
  color: var(--text);
  text-decoration: none;
  display: inline-block;
}

.contact-link:hover {
  color: var(--accent);
}

.card h3,
.solution h3,
.case-card h3,
.contact-card h3 {
  margin-top: 0;
}

.case-card h3 {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.case-card h3,
.case-card p {
  text-align: left;
}

.case-card p[data-i18n^="cases.item"] {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
  min-height: 3.2em;
}

.case-detail {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

.case-tag {
  display: inline-block;
  background: rgba(244, 179, 59, 0.18);
  color: var(--accent-2);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  margin-bottom: 10px;
}

.case-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
}

.case-media {
  margin-top: 28px;
}

.section-header.small h3 {
  margin: 0 0 6px;
}

.case-video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.case-video-grid video,
.case-video-grid iframe {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #000;
}

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

.news-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 16px;
}

.news-date {
  font-size: 13px;
  color: var(--accent);
}

.news-detail {
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  background: #070b12;
}

[data-theme="light"] .site-footer {
  background: #eef2f7;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-left {
  color: var(--text-muted);
}

.footer-right {
  color: var(--text-muted);
  font-size: 12px;
}

@media (max-width: 860px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
  }

  .news-item {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}