:root {
  --bg: #eaf2fb;
  --surface: #ffffff;
  --surface-soft: #f4f8ff;
  --primary: #0b56c9;
  --primary-deep: #061f54;
  --accent: #00d0ff;
  --accent-2: #19ffa8;
  --text: #13263f;
  --muted: #596e88;
  --border: #d4e0f0;
  --radius: 18px;
  --shadow: 0 20px 42px rgba(8, 45, 109, 0.12);
  --shadow-strong: 0 26px 70px rgba(6, 31, 84, 0.18);
  --glass: rgba(255, 255, 255, 0.72);
  --glass-2: rgba(255, 255, 255, 0.55);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(180deg, #f6fbff 0%, #eef5ff 45%, #e6eef7 100%);
  overflow: hidden;
}

.site-bg::before,
.site-bg::after {
  content: "";
  position: absolute;
  inset: -40%;
}

.site-bg::before {
  background:
    radial-gradient(520px 360px at 20% 20%, rgba(0, 208, 255, 0.22), transparent 68%),
    radial-gradient(620px 420px at 70% 15%, rgba(25, 255, 168, 0.16), transparent 70%),
    radial-gradient(820px 520px at 65% 78%, rgba(11, 86, 201, 0.18), transparent 72%),
    linear-gradient(120deg, rgba(0, 208, 255, 0.08), transparent 40%, rgba(25, 255, 168, 0.07));
  animation: bgFloat 18s ease-in-out infinite;
  opacity: 0.95;
}

.site-bg::after {
  background:
    repeating-linear-gradient(
      0deg,
      rgba(8, 45, 109, 0.08) 0px,
      rgba(8, 45, 109, 0.08) 1px,
      transparent 1px,
      transparent 48px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(8, 45, 109, 0.06) 0px,
      rgba(8, 45, 109, 0.06) 1px,
      transparent 1px,
      transparent 48px
    );
  animation: bgGrid 26s linear infinite;
  opacity: 0.7;
}

@keyframes bgFloat {
  0% {
    transform: translate3d(-1.5%, -1%, 0) scale(1);
  }
  50% {
    transform: translate3d(1.2%, 1.4%, 0) scale(1.03);
  }
  100% {
    transform: translate3d(-1.5%, -1%, 0) scale(1);
  }
}

@keyframes bgGrid {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(-48px, -48px, 0);
  }
}

.container {
  width: min(1140px, 92vw);
  margin: 0 auto;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.35;
  font-family: "Source Han Serif SC", "Songti SC", "STSong", serif;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(147, 173, 208, 0.35);
  background: rgba(246, 250, 255, 0.76);
  backdrop-filter: blur(12px);
}

.nav-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
}

.brand {
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 14px 34px rgba(6, 31, 84, 0.16);
}

.brand-mark img {
  display: block;
  width: 42px;
  height: 42px;
}

.brand-text {
  font-size: 16px;
  font-weight: 650;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  font-weight: 560;
}

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

.nav-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.lang-link {
  text-decoration: none;
  color: var(--primary-deep);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.8);
}

.lang-link.is-active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(140deg, var(--primary), #1f77cd);
}

.menu-btn {
  display: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  background: #fff;
  color: var(--primary-deep);
  font-size: 13px;
  font-weight: 600;
}

.hero {
  padding: 82px 0 58px;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.hero h1 {
  margin-top: 12px;
  max-width: 14ch;
  font-size: clamp(34px, 6vw, 64px);
  background: linear-gradient(90deg, var(--primary-deep) 0%, #0b56c9 42%, #1a7bd6 70%, #00bfe8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  margin: 18px 0 0;
  max-width: 680px;
  color: var(--muted);
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  text-decoration: none;
  border-radius: 12px;
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(140deg, #0b56c9, #07a2d5 62%, #00d0ff);
  box-shadow: 0 16px 40px rgba(11, 86, 201, 0.22);
}

.btn-ghost {
  color: var(--primary-deep);
  background: #fff;
  border: 1px solid var(--border);
}

.btn::after {
  content: "";
  position: absolute;
  inset: -2px;
  background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.55) 50%, transparent 100%);
  transform: translateX(-140%);
  transition: transform 0.65s ease;
}

.btn:hover::after {
  transform: translateX(140%);
}

.hero-badges {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: 900px;
}

.hero-badges span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(212, 224, 240, 0.9);
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(10px);
  color: #16427d;
  font-size: 12px;
  font-weight: 650;
}

.hero-badges span::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, var(--accent-2), var(--accent));
  box-shadow: 0 0 0 4px rgba(0, 208, 255, 0.12);
}

.hero-metrics {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.hero-metrics article,
.card,
.case-card,
.news-card,
.partner-item,
.about-panel {
  background: linear-gradient(180deg, var(--glass), var(--glass-2));
  border: 1px solid rgba(212, 224, 240, 0.92);
  border-radius: var(--radius);
  box-shadow: var(--shadow-strong);
  backdrop-filter: blur(14px);
}

.hero-metrics article {
  padding: 18px 20px;
}

.hero-metrics h2 {
  font-size: clamp(24px, 3vw, 30px);
  color: var(--primary);
}

.hero-metrics p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 54px 0;
}

.section h2 {
  margin-top: 10px;
  font-size: clamp(28px, 3.8vw, 44px);
  color: var(--primary-deep);
}

.section-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

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

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

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

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

.card,
.case-card,
.news-card {
  padding: 22px 20px;
  transition: transform 0.25s ease, border-color 0.25s ease;
  position: relative;
}

.card:hover,
.case-card:hover,
.news-card:hover,
.partner-item:hover,
.about-panel:hover {
  transform: translateY(-4px);
  border-color: rgba(12, 169, 200, 0.48);
}

.card::before,
.case-card::before,
.news-card::before,
.about-panel::before,
.partner-item::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 208, 255, 0.65), rgba(25, 255, 168, 0.35), rgba(11, 86, 201, 0.35));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.card:hover::before,
.case-card:hover::before,
.news-card:hover::before,
.about-panel:hover::before,
.partner-item:hover::before {
  opacity: 1;
}

.card h3,
.case-card h3,
.news-card h3 {
  font-size: 21px;
  color: #10376d;
}

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

.highlight {
  overflow: hidden;
  position: relative;
}

.highlight::after {
  content: "";
  position: absolute;
  top: -46px;
  right: -40px;
  width: 140px;
  height: 140px;
  border-radius: 44%;
  background: radial-gradient(circle at center, rgba(12, 169, 200, 0.24), transparent 68%);
}

.timeline {
  margin-top: 24px;
  border-left: 2px solid #9bc1e0;
  padding-left: 26px;
  display: grid;
  gap: 18px;
}

.timeline article {
  position: relative;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
}

.timeline article::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 23px;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: linear-gradient(145deg, var(--accent), var(--primary));
  box-shadow: 0 0 0 5px rgba(12, 169, 200, 0.2);
}

.timeline h3 {
  color: #10376d;
  font-size: 20px;
}

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

.case-tag {
  margin: 0;
  width: fit-content;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(13, 74, 165, 0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.case-card h3 {
  margin-top: 12px;
}

.partner-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.partner-item {
  min-height: 112px;
  display: grid;
  place-items: center;
  padding: 18px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: #17407a;
  transition: transform 0.25s ease, border-color 0.25s ease;
  position: relative;
}

.news-card time {
  display: inline-flex;
  color: #3a5f93;
  font-size: 13px;
  font-weight: 700;
}

.news-card h3 {
  margin-top: 10px;
}

.about-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 14px;
}

.about-panel {
  padding: 24px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.about-panel h3 {
  color: #10376d;
  font-size: 23px;
}

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

.value-list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.value-list li + li {
  margin-top: 8px;
}

.contact {
  margin: 18px auto 62px;
  padding: 42px;
  color: #fff;
  border-radius: 22px;
  box-shadow: 0 28px 68px rgba(6, 31, 84, 0.3);
  background:
    radial-gradient(800px 220px at 20% 0%, rgba(0, 208, 255, 0.35), transparent 60%),
    radial-gradient(700px 260px at 78% 20%, rgba(25, 255, 168, 0.22), transparent 62%),
    linear-gradient(145deg, #072a6a 0%, #0b56c9 55%, #00bfe8 100%);
}

.contact h2 {
  color: #fff;
}

.contact p {
  margin: 10px 0 0;
  opacity: 0.92;
}

.contact-list {
  margin-top: 18px;
  display: grid;
  gap: 8px;
}

.contact-list a,
.contact-list span {
  width: fit-content;
  color: #fff;
  text-decoration: none;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.13);
  padding: 8px 12px;
}

.site-footer {
  border-top: 1px solid rgba(147, 173, 208, 0.38);
  padding: 20px 0 34px;
}

.site-footer p {
  margin: 0;
  color: #6a809b;
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.7s ease;
}

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

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

  .site-bg::before,
  .site-bg::after,
  .reveal {
    animation: none !important;
    transition: none !important;
  }

  .btn::after {
    display: none;
  }
}

@media (max-width: 1130px) {
  .cards-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cards-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .brand-text {
    font-size: 15px;
  }

  .nav-links {
    gap: 12px;
  }

  .nav-links a {
    font-size: 13px;
  }

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

  .about-grid,
  .cards-2,
  .partner-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .menu-btn {
    display: block;
  }

  .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: 70px;
    display: grid;
    gap: 8px;
    padding: 14px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-links a {
    padding: 8px;
  }

  .hero {
    padding-top: 66px;
  }
}

@media (max-width: 680px) {
  .cards-4,
  .cards-3 {
    grid-template-columns: 1fr;
  }

  .brand-text {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-badges {
    gap: 8px;
  }

  .contact {
    padding: 26px 20px;
  }
}