/* ============================================
   云极客官网 - 浅色科技风主题
   3D元素 + 微交互设计
   ============================================ */

/* @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap'); */

/* CSS 变量 - 浅色科技配色 */
:root {
  /* 主色调 - 科技蓝 */
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #2563eb;

  --secondary: #8b5cf6;
  --secondary-light: #a78bfa;
  --secondary-dark: #7c3aed;

  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --accent-dark: #0891b2;

  /* 浅色主题 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-elevated: #ffffff;

  /* 文字颜色 */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-glow: #1e293b;

  /* 边框和分割线 */
  --border: rgba(59, 130, 246, 0.15);
  --border-hover: rgba(59, 130, 246, 0.3);
  --divider: #e2e8f0;

  /* 阴影 - 科技感渐变阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.1);

  /* 科技感阴影 - 蓝色光晕 */
  --shadow-glow: 0 4px 24px rgba(59, 130, 246, 0.15);
  --shadow-glow-strong: 0 8px 40px rgba(59, 130, 246, 0.25);

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --gradient-surface: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  --gradient-mesh: radial-gradient(at 40% 20%, rgba(59, 130, 246, 0.08) 0px, transparent 50%),
                    radial-gradient(at 80% 0%, rgba(139, 92, 246, 0.06) 0px, transparent 50%),
                    radial-gradient(at 0% 50%, rgba(6, 182, 212, 0.06) 0px, transparent 50%);

  /* 3D 变换 */
  --transform-3d: perspective(1000px);
  --rotate-x: rotateX(var(--rx, 0deg));
  --rotate-y: rotateY(var(--ry, 0deg));

  /* 过渡动画 */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 确保页面内容可见 */
body {
  visibility: visible !important;
  opacity: 1 !important;
}

section {
  visibility: visible !important;
  opacity: 1 !important;
  display: block !important;
}

[data-reveal] {
  opacity: 1 !important;
  transform: none !important;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 背景网格装饰 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* 背景渐变装饰 */
body::after {
  content: '';
  position: fixed;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: var(--gradient-mesh);
  pointer-events: none;
  z-index: 0;
  animation: mesh-move 20s ease-in-out infinite;
}

@keyframes mesh-move {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(-5%, -5%) rotate(5deg); }
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary-light), var(--primary));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ============================================
   导航栏 - 玻璃拟态
   ============================================ */

.navbar {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-normal);
  padding: 1rem 0;
  position: relative;
  z-index: 100;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

.navbar::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.navbar.scrolled::after {
  opacity: 1;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary) !important;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: transform var(--transition-normal);
}

.navbar-brand:hover {
  transform: scale(1.02);
}

.navbar-brand img {
  height: 40px;
  width: auto;
  filter: drop-shadow(0 2px 8px rgba(59, 130, 246, 0.2));
}

.navbar-brand span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  padding: 0.75rem 1.25rem !important;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--primary) !important;
}

.nav-link:hover::before,
.nav-link.active::before {
  width: 60%;
}

.nav-link.active {
  color: var(--primary) !important;
}

/* ============================================
   Hero 区域 - 3D 浮动元素
   ============================================ */

#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gradient-surface);
  padding-top: 80px;
}

/* 3D 浮动装饰球 */
.hero-sphere {
  position: absolute;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0.25;
  filter: blur(40px);
  animation: float 8s ease-in-out infinite;
}

.hero-sphere:nth-child(1) {
  width: 400px;
  height: 400px;
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.hero-sphere:nth-child(2) {
  width: 300px;
  height: 300px;
  bottom: -50px;
  left: -50px;
  background: var(--gradient-accent);
  animation-delay: 2s;
}

.hero-sphere:nth-child(3) {
  width: 200px;
  height: 200px;
  top: 50%;
  left: 20%;
  background: var(--gradient-primary);
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(80px, -60px) scale(1.1); }
  66% { transform: translate(-50px, 40px) scale(0.9); }
}

/* 3D 网格地板 */
.hero-grid {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 60%;
  background:
    linear-gradient(rgba(59, 130, 246, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
  transform: perspective(500px) rotateX(60deg);
  transform-origin: bottom;
  mask-image: linear-gradient(to bottom, transparent, black);
  -webkit-mask-image: linear-gradient(to bottom, transparent, black);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 2rem;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
  animation: badge-appear 0.6s ease-out;
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes badge-appear {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.4); }
  50% { opacity: 0.8; transform: scale(1.1); box-shadow: 0 0 0 8px rgba(6, 182, 212, 0); }
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: title-appear 0.8s ease-out 0.2s backwards;
}

@keyframes title-appear {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  font-weight: 400;
  animation: subtitle-appear 0.8s ease-out 0.4s backwards;
}

@keyframes subtitle-appear {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: cta-appear 0.8s ease-out 0.6s backwards;
}

@keyframes cta-appear {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 按钮样式 - 3D 悬停效果 */
.btn {
  padding: 1rem 2rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
  transform: translateY(0);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
  color: white;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.05);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* 滚动提示 */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  animation: bounce 2s infinite;
}

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

.scroll-indicator::after {
  content: '';
  width: 24px;
  height: 40px;
  border: 2px solid var(--border);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator::before {
  content: '';
  position: absolute;
  width: 4px;
  height: 8px;
  background: var(--primary);
  border-radius: 2px;
  top: 30px;
  animation: scroll-dot 2s infinite;
}

@keyframes scroll-dot {
  0%, 100% { opacity: 0; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(10px); }
}

/* ============================================
   通用区块样式
   ============================================ */

section {
  padding: 4rem 0;
  position: relative;
  background: var(--bg-primary);
}

section:nth-child(even) {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   服务项目 - 3D 卡片
   ============================================ */

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem;
  transition: all var(--transition-normal);
  height: 100%;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  perspective: 1000px;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
  border-radius: 20px;
}

.service-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(59, 130, 246, 0.1), transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  border-radius: 20px;
  pointer-events: none;
}

.service-card:hover::after {
  opacity: 1;
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow-strong);
}

.service-card:hover::before {
  opacity: 0.03;
}

.service-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.75rem;
  color: white;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
  transition: transform var(--transition-normal);
}

.service-card:hover .service-icon {
  transform: scale(1.1) rotateY(10deg);
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}

.service-card p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
}

.service-tag {
  padding: 0.25rem 0.75rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 500;
}

/* ============================================
   产品案例 - 立体卡片
   ============================================ */

.portfolio-filter {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 30px;
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.filter-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.filter-btn span {
  position: relative;
  z-index: 1;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: transparent;
  color: white;
}

.filter-btn:hover::before,
.filter-btn.active::before {
  opacity: 1;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.portfolio-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
  transform-style: preserve-3d;
}

.portfolio-item:hover {
  transform: translateY(-8px) rotateX(2deg);
  border-color: var(--primary);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.portfolio-image {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.portfolio-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-item:hover .portfolio-image img {
  transform: scale(1.1);
}

.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.95), transparent);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-content {
  padding: 1.5rem;
}

.portfolio-content h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.portfolio-content p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.portfolio-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.portfolio-tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  border-radius: 6px;
  font-weight: 500;
}

/* ============================================
   关于我们
   ============================================ */

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.about-image {
  position: relative;
}

.about-image img {
  width: 100%;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-normal);
}

.about-image:hover img {
  transform: scale(1.02);
}

.about-image::before {
  content: '';
  position: absolute;
  top: -20px;
  left: -20px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--primary);
  border-radius: 24px;
  opacity: 0.2;
  transition: all var(--transition-normal);
}

.about-image:hover::before {
  top: -10px;
  left: -10px;
  opacity: 0.3;
}

.about-content h3 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

/* 统计数据 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.stat-card {
  text-align: center;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: all var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
}

/* ============================================
   核心团队
   ============================================ */

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: all var(--transition-normal);
  transform-style: preserve-3d;
}

.team-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.team-image {
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--bg-tertiary);
  position: relative;
}

.team-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.team-card:hover .team-image img {
  transform: scale(1.1);
}

.team-info {
  padding: 1.5rem;
  text-align: center;
}

.team-info h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.team-info p {
  font-size: 0.875rem;
  color: var(--primary);
  margin-bottom: 1rem;
  font-weight: 500;
}

.team-social {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}

.team-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 12px;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
  border: 1px solid var(--border);
}

.team-social a:hover {
  background: var(--gradient-primary);
  color: white;
  border-color: transparent;
  transform: translateY(-2px);
}

/* ============================================
   招聘信息
   ============================================ */

.job-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.job-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.job-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.job-header {
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  flex-wrap: wrap;
  gap: 1rem;
  transition: background var(--transition-fast);
}

.job-header:hover {
  background: var(--bg-secondary);
}

.job-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.job-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.job-meta span {
  padding: 0.25rem 0.75rem;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 20px;
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 500;
}

.job-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.job-body.active {
  max-height: 1000px;
}

.job-content {
  padding: 0 2rem 2rem;
}

.job-content h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.job-content ul {
  list-style: none;
  padding-left: 0;
}

.job-content li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.job-content li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.job-footer {
  padding: 1rem 2rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.job-salary {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary);
}

/* ============================================
   联系我们
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.contact-info {
  display: contents;
}

.contact-item {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all var(--transition-normal);
}

.contact-item:hover {
  border-color: var(--primary);
  transform: translateX(4px);
  box-shadow: var(--shadow-glow);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: white;
  flex-shrink: 0;
}

.contact-text h4 {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
  font-weight: 500;
}

.contact-text p {
  color: var(--text-primary);
  font-weight: 600;
}

.contact-map {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xl);
  height: 100%;
  min-height: 350px;
}

.contact-map iframe {
  width: 100%;
  height: 100%;
  min-height: 350px;
  border: none;
}

#dituContent {
  width: 100%;
  height: 100%;
  min-height: 350px;
  background: var(--bg-tertiary);
}

/* ============================================
   页脚
   ============================================ */

footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--divider);
  padding: 3rem 0 1.5rem;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-brand img {
  height: 40px;
  width: auto;
  max-width: none;
  object-fit: contain;
  display: block;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-links h4 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-weight: 700;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--divider);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-bottom a {
  color: var(--primary);
  text-decoration: none;
}

/* ============================================
   3D 效果类
   ============================================ */

.card-3d {
  transform-style: preserve-3d;
  transition: transform var(--transition-normal);
}

.card-3d:hover {
  transform: translateY(-8px) rotateX(5deg) rotateY(5deg);
}

/* ============================================
   微交互效果
   ============================================ */

/* 磁性按钮效果 */
.btn-magnetic {
  transition: transform var(--transition-fast);
}

/* 点击波纹效果 */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width var(--transition-normal), height var(--transition-normal);
}

.ripple:active::after {
  width: 200px;
  height: 200px;
}

/* 文字渐变动画 */
.gradient-text-animated {
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent), var(--primary));
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* 光标跟随效果 */
.cursor-glow {
  position: fixed;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity var(--transition-fast);
  z-index: 9999;
  opacity: 0;
}

.cursor-glow.active {
  opacity: 1;
}

/* ============================================
   响应式设计
   ============================================ */

@media (max-width: 992px) {
  section {
    padding: 3rem 0;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .portfolio-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 0.75rem 0;
  }

  section {
    padding: 2rem 0;
  }

  .hero-content {
    padding: 1rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .job-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .job-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  /* 移动端隐藏装饰元素 */
  .hero-sphere,
  .hero-grid {
    display: none;
  }
}

/* ============================================
   加载动画
   ============================================ */

.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader {
  width: 50px;
  height: 50px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}