html {
  scroll-behavior: smooth;
}

:root {
  --blue: #3370ff;        /* 品牌主蓝 */
  --blue-deep: #0052d9;   /* 深蓝（导航激活） */
  --blue-light: #b8d3fe;  /* 浅蓝（序号） */
  --blue-pale: #f2f3ff;   /* 导航激活底 */
  --dot-blue: #d6e1ff;    /* 时间轴激活外圈 */
  --ink: #000000;
  --gray: #4e5969;        /* 正文辅助色 */
  --slate: #404f80;       /* 统计标签色 */
  --bg-gray: #f6f6f6;     /* 分区浅灰底 */
  --bg-stats: #f5f5f5;    /* 数据条底 */
  --card: #fefefe;        /* 卡片底 */
  --medal: #a8906f;       /* 资质勋章色 */
  --white: #ffffff;
  --radius-btn: 8px;
  --radius-card: 12px;
  --container: 1440px;
  --color-bg: hsl(210 40% 99%);
  --color-surface: hsl(214 32% 96%);
  --color-surface-hover: hsl(214 32% 92%);
  --color-border: hsl(214 25% 89%);
  --color-border-strong: hsl(214 25% 76%);
  --color-text-primary: hsl(215 35% 12%);
  --color-text-secondary: hsl(215 18% 38%);
  --color-text-tertiary: hsl(215 12% 55%);
  --color-accent: hsl(212 95% 48%);
  --color-accent-hover: hsl(212 95% 42%);
  --color-accent-2: hsl(200 90% 46%);
  --color-accent-soft: hsl(212 95% 96%);
  --color-accent-border: hsl(212 85% 88%);
  --color-dark: hsl(218 55% 14%);
  --color-dark-2: hsl(218 45% 22%);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Menlo', monospace;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 30px -10px rgba(0, 0, 0, 0.10), 0 4px 12px -4px rgba(0, 0, 0, 0.05);
  --dur-fast: 120ms;
  --dur-base: 180ms;
  --dur-slow: 320ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
}

.container {
  width: var(--container);
  margin: 0 auto;
  padding: 60px 120px;
}

/* 顶部导航 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
  background-color: #fff;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 120px;
}

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

.logo-img {
  width: 168px;
  height: 40px;
}

.nav {
  display: flex;
  gap: 16px;
}

.nav-link {
  font-size: 14px;
  line-height: 22px;
  color: #000;
  text-decoration: none;
  transition: color 0.3s;
  padding: 5px 12px;
}

.nav-link:hover,
.nav-link.active {
  color: var(--blue-deep);
}
.nav-link.active {
  background: var(--blue-pale);
  color: var(--blue-deep);
}

.btn-about {
  font-size: 14px;
  color: var(--white);
  text-decoration: none;
  border: 2px solid var(--blue);
  background-color: var(--blue);
  padding: 10px 24px;
  border-radius: 6px;
  transition: all 0.3s;
}

/* Hero 区域 */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  padding-top: 64px;
  overflow: hidden;
  background-image: url('/img/hero-bg.jpg');
  background-size: cover;
  background-position: center;
}
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #0c1929 0%, #1a365d 50%, #1e40af 100%);
  z-index: -1;
}

.hero-bg-image {
  width: 100%;
  height: 100%;
  background: url('hero-bg-placeholder.png') center/cover;
  opacity: 0.8;
}

/* 科技感光效 */
.hero-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 120px;
  padding-left: 120px;
  padding-right: 100px;
}

.hero-text {
  flex: 1;
  color: #fff;
}

.hero-text h1 {
  font-size: 64px;
  font-weight: 700;
  line-height: 72px;
  margin-bottom: 28px;
}

.hero-text .highlight {
  color: #5BE4FC;
}

.hero-subtitle {
  font-size: 24px;
  color: #fff;
  margin-bottom: 32px;
  line-height: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

.btn {
  width: 138px;
  height: 42px;
  line-height: 42px;
  text-align: center;
  opacity: 1;
  gap: 10px;
  border-radius: 8px;
  border-width: 1px;
  font-size: 16px;
  color: #fff;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(90deg, #3E94FF 0%, #5862FF 50.48%, #2546FF 94.71%);
}

.btn-outline {
  background: transparent;
  background: #FFFFFF33;
  border: 1px solid #FFFFFF80;
}

/* Hero 右侧 3D 图形 */
.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 516px;
  height: 387px;
}
.hero-image-img {
  width: 100%;
  height: 100%;
}

.hero-3d-placeholder {
  position: relative;
  width: 400px;
  height: 400px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.sphere {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle at 30% 30%, #60a5fa, #2563eb, #1e40af);
  border-radius: 50%;
  box-shadow: 0 0 60px rgba(59, 130, 246, 0.5), inset 0 0 40px rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 10;
}

.sphere::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 25%;
  width: 30%;
  height: 20%;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  filter: blur(10px);
}

.orbit {
  position: absolute;
  border: 2px solid rgba(96, 165, 250, 0.3);
  border-radius: 50%;
  animation: rotate 20s linear infinite;
}

.orbit-1 {
  width: 280px;
  height: 280px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotateX(60deg);
}

.orbit-2 {
  width: 320px;
  height: 320px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotateX(60deg) rotateZ(60deg);
  animation-delay: -7s;
}

.orbit-3 {
  width: 360px;
  height: 360px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotateX(60deg) rotateZ(120deg);
  animation-delay: -14s;
}

@keyframes rotate {
  from {
    transform: translate(-50%, -50%) rotateX(60deg) rotateZ(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotateX(60deg) rotateZ(360deg);
  }
}

.icon {
  position: absolute;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(96, 165, 250, 0.5);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #60a5fa;
  font-size: 20px;
  backdrop-filter: blur(5px);
  animation: float 3s ease-in-out infinite;
}

.icon-1 { top: 10%; left: 60%; animation-delay: 0s; }
.icon-2 { top: 30%; left: 80%; animation-delay: 0.5s; }
.icon-3 { top: 70%; left: 85%; animation-delay: 1s; }
.icon-4 { top: 85%; left: 55%; animation-delay: 1.5s; }
.icon-5 { top: 75%; left: 20%; animation-delay: 2s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* 数据统计 */
.stats {
  background: #f8fafc;
  border-top: 1px solid #e2e8f0;
}
.stats .container {
  padding: 32px 120px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  text-align: center;
}

.stat-number {
  margin-bottom: 10px;
}

.number {
  font-size: 64px;
  font-weight: 600;
  color: var(--blue);
}

.unit {
  font-size: 28px;
  font-weight: 600;
  color: var(--blue);
}

.stat-desc {
  font-size: 20px;
  color: var(--gray);
}

/* 其他内容区域 */
.content-section {
  padding: 80px 0;
  background: #fff;
}

.content-section p {
  text-align: center;
  color: #94a3b8;
  font-size: 18px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 36px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-3d-placeholder {
    width: 300px;
    height: 300px;
  }

  .sphere {
    width: 150px;
    height: 150px;
  }

  .orbit-1 { width: 210px; height: 210px; }
  .orbit-2 { width: 240px; height: 240px; }
  .orbit-3 { width: 270px; height: 270px; }

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

@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .hero-text h1 {
    font-size: 28px;
  }

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

  .btn {
    padding: 12px 24px;
    font-size: 14px;
  }

  .number {
    font-size: 40px;
  }

  .unit {
    font-size: 18px;
  }
}

/* 关于我们 */
.about {
  background: #fff;
}

.about-container {
  padding: 94px 120px;
  padding-right: 0;
  position: relative;
}

.about-content {
  width: 648px;
}

.about-title {
  font-size: 40px;
  line-height: 60px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.about-text {
  margin-bottom: 32px;
}

.about-text p {
  font-size: 14px;
  line-height: 24px;
  color: var(--ink);
}

.certifications {
  display: flex;
  gap: 40px;
  margin-bottom: 32px;
}

.cert-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.cert-icon {
  width: 100%;
  height: 24px;
}
.cert-icon img {
  width: 24px;
  height: 24px; 
}

.cert-text {
  font-size: 14px;
  line-height: 22px;
  color: var(--ink);
  white-space: nowrap;
  font-weight: 600;
}

.btn-more {
  display: inline-block;
  width: 120px;
  height: 48px;
  line-height: 48px;
  text-align: center;
  background: var(--blue);
  color: #fff;
  border-radius: 8px;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.3s;
}

.btn-more:hover {
  background: var(--blue-deep);
}

.about-image {
  /* width: 638px; */
  height: 100%;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  right: 0;
}

.about-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}



/* 发展历程 */
.history.gray { background: var(--bg-gray); }
.history .container {
  height: 500px;
}
.section-title {
  font-size: 40px;
  font-weight: 600;
  line-height: 60px;
  margin-bottom: 32px;
}
.section-title.center { text-align: center; }
  .timeline { position: relative; padding: 46px 0 0; overflow: hidden; }
  .timeline-axis {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    top: 100px;
    height: 1px;
    background: #dfe3ea;
  }
  .timeline-track-wrapper {
    /* overflow: hidden; */
    position: relative;
  }
  .timeline-track { position: relative; display: flex; justify-content: space-between; padding: 0 34px; transition: transform 0.4s ease; }
  .tl-arrow {
    position: absolute;
    top: 84px;
    width: 33px;
    height: 33px;
    border-radius: 50%;
    background: #d9d9d9;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #707070;
    z-index: 3;
    cursor: pointer;
  }
  .tl-arrow.prev { left: 0; }
  .tl-arrow.next { right: 0; }
  .tl-arrow:hover { background: var(--blue-light); color: var(--blue-deep); }
  .tl-node {
    position: relative;
    z-index: 2;
    background: none;
    border: none;
    text-align: center;
    width: 110px;
  }
  .tl-node .year { font-size: 18px; font-weight: 600; color: var(--ink); }
  .tl-node .dot {
    margin: 16px auto 0;
    width: 33px;
    height: 33px;
    border-radius: 50%;
    background: #d9d9d9;
    position: relative;
    transition: background .2s;
    cursor: pointer;
  }
  .tl-node .dot::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: #707070;
    transition: background .2s;
  }
  .tl-node.active .dot { background: var(--dot-blue); box-shadow: 0 0 0 6px rgba(51, 112, 255, .12); }
  .tl-node.active .dot::after { background: var(--blue); }
  .tl-node:hover .dot { background: var(--dot-blue); }
  .tl-detail {
    margin: 40px auto 0;
    width: 600px;
    max-width: 100%;
    text-align: center;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  }
  .tl-detail h3 { font-size: 20px; font-weight: 600; color: #333; margin-bottom: 12px; }
  .tl-detail p { margin-top: 0; font-size: 14px; color: var(--gray); line-height: 22px; }

/* 企业级AI能力 */
.ai-capability {
  background: white;
}
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;

}

.ai-card {
  background: #fefefe;
  box-shadow: 0px 0px 40px 0px #92929233;
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.ai-icon {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  border-radius: 50%;
}

.ai-card-info {
  flex: 1;
}

.ai-card-title {
  font-size: 18px;
  line-height: 26px;
  font-weight: 600;
  color: #000;
  margin-bottom: 8px;
}

.ai-card-desc {
  font-size: 14px;
  line-height: 22px;
  color: var(--gray);
}

/* 业务模块 */
.business {
  background: #f6f6f6;
}
.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.business-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.business-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.business-card-img {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.business-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.business-card-content {
  padding: 24px;
}

.business-card-title {
  font-size: 20px;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 12px;
}

.business-card-desc {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.6;
}

/* 自研六大平台 */
.platform {
  background: white;
}
.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.platform-card {
  background: #fefefe;
  box-shadow: 0px 0px 40px 0px #92929233;
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.3s ease;
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.platform-card-info {
  flex: 1;
  padding-right: 20px;
}

.platform-card-title {
  font-size: 20px;
  font-weight: 600;
  color: #000;
  margin-bottom: 12px;
}

.platform-card-desc {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.6;
}

.platform-card-img {
  width: 120px;
  height: 120px;
  flex-shrink: 0;
}

.platform-card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* 产品组合 */
.product {
  background: #f6f6f6;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: #fff;
  border-radius: 12px;
  padding: 32px;
  position: relative;
  min-height: 280px;
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.product-card-title {
  font-size: 20px;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 20px;
}

.product-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.product-card-list li {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.8;
  position: relative;
  padding-left: 16px;
}

.product-card-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #3370FF;
}

.product-card-img {
  position: absolute;
  bottom: 20px;
  right: 5px;
  width: 140px;
  height: 100px;
}

.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* 核心优势 */
.advantage {
  background: white;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  background: #fff;
  box-shadow: 0px 0px 40px 0px #92929233;
  border-radius: 12px;
  padding: 32px;
  position: relative;
  transition: all 0.3s ease;
}

.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.advantage-card-img {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 80px;
  height: 80px;
}

.advantage-card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.advantage-card-num {
  font-size: 28px;
  font-weight: 700;
  color: #3370FF;
  margin-bottom: 8px;
}

.advantage-card-num span {
  font-size: 14px;
  font-weight: 400;
  color: #999;
}

.advantage-card-title {
  font-size: 18px;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 20px;
}

.advantage-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.advantage-card-list li {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.8;
  position: relative;
  padding-left: 16px;
}

.advantage-card-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #3370FF;
}

/* 使用场景 */
.scenario {
  background: #f7f8fa;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.scenario-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
}

.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.scenario-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.scenario-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scenario-card-info {
  flex: 1;
}

.scenario-card-tag {
  font-size: 12px;
  line-height: 20px;
  color: var(--blue);
  font-weight: 600;
  padding: 0px 4px;
  border-radius: 4px;
  background-color: #EEF5FE;
}

.scenario-card-title {
  font-size: 18px;
  line-height: 26px;
  font-weight: 600;
  color: #1a1a1a;
}

.scenario-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scenario-tag {
  font-size: 12px;
  color: var(--gray);
  background: #EEF5FE;
  padding: 0px 4px;
  border-radius: 4px;
  line-height: 20px;
}

/* 荣誉证书 */
.certificate {
  background: white;
}

.certificate-content {
  text-align: center;
}

.certificate-img {
  max-width: 100%;
  height: auto;
}

/* 合作伙伴 */
.partner {
  background: var(--bg-gray);
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.partner-item {
  background: #fff;
  border-radius: 8px;
  padding: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  transition: all 0.3s ease;
}

.partner-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.partner-item img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* 联系合作 */
.contact {
  background: var(--color-dark);
  color: #fff;
}

.contact-title {
    font-size: clamp(28px, 3.6vw, 44px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-4);
}

.contact-subtitle {
    color: rgba(255, 255, 255, 0.66);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 48px;
}

.contact-cards {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-6);
  align-items: stretch;
}

.contact-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: background-color 200ms var(--ease-out), border-color 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.contact-card-header {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: hsl(212 95% 78%);
  letter-spacing: 0.02em;
}
.contact-card-header svg {
  color: hsl(212 95% 72%);
}
.contact-qr {
  width: 120px;
  height: 120px;
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 8px 24px -8px rgba(0, 0, 0, 0.4);
  align-self: flex-start;
}

.contact-qr img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.contact-qr-text {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: auto;
}

.contact-phone {
  font-family: var(--font-mono);
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #ffffff;
  line-height: 1.2;
  transition: color 150ms var(--ease-out);
}

.contact-phone-desc {
  font-size: 14px;
  color: #666;
}

/* 页脚 */
.footer {
  background: white;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  margin-bottom: var(--space-8);
  
}

.footer-logo-img {
  height: 40px;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 13px;
  color: rgb(102, 102, 102);
  line-height: 1.7;
  margin-top: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer-center h4,
.footer-right h4 {
  font-size: 16px;
  font-weight: 600;
  color: #333;
  margin-bottom: 20px;
}

.footer-center a {
  display: block;
  font-size: 14px;
  color: #666;
  text-decoration: none;
  margin-bottom: 12px;
  transition: color 0.3s;
}

.footer-center a:hover {
  color: #3370FF;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 14px;
  color: #666;
}

.footer-contact-item svg {
  color: #3370FF;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-tertiary);
}
.footer__bottom a {
    color: var(--color-text-tertiary);
    margin-left: var(--space-3);
    text-decoration: none;
}