:root {
  --bg-primary: #0b0e1a;
  --bg-secondary: #13172b;
  --bg-card: #1a1f3a;
  --bg-elevated: #212845;
  --text-primary: #f0f3ff;
  --text-secondary: #b8c2e0;
  --text-muted: #7a86b0;
  --accent-cyan: #3de0ff;
  --accent-purple: #9d6eff;
  --accent-gold: #ffd166;
  --accent-pink: #ff6b9d;
  --border-subtle: #2a3155;
  --shadow-glow: 0 0 30px rgba(61, 224, 255, 0.15);
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-primary: linear-gradient(135deg, #3de0ff 0%, #9d6eff 100%);
  --gradient-warm: linear-gradient(135deg, #ffd166 0%, #ff6b9d 100%);
  --gradient-cool: linear-gradient(135deg, #9d6eff 0%, #3de0ff 100%);
  --glass-bg: rgba(26, 31, 58, 0.65);
  --glass-border: rgba(61, 224, 255, 0.12);
  --glass-blur: blur(16px);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(61, 224, 255, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(157, 110, 255, 0.06) 0%, transparent 60%);
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

input, textarea {
  font-family: inherit;
}

::selection {
  background: rgba(61, 224, 255, 0.3);
  color: var(--text-primary);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* ============ 吸顶导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 14, 26, 0.75);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 24px;
  transition: box-shadow var(--transition-base), background var(--transition-base), border-color var(--transition-base);
}

.site-header.scrolled {
  background: rgba(11, 14, 26, 0.92);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  border-bottom-color: rgba(61, 224, 255, 0.15);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: opacity var(--transition-base);
}

.logo:hover {
  opacity: 0.85;
}

.logo-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.logo:hover .logo-icon {
  transform: rotate(15deg) scale(1.05);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-base);
  position: relative;
  padding-bottom: 2px;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--accent-cyan);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
  border-radius: 2px;
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  width: 100%;
}

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 40px;
  padding: 6px 16px;
  gap: 8px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.search-box:focus-within {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(61, 224, 255, 0.15), 0 0 20px rgba(61, 224, 255, 0.1);
  background: rgba(26, 31, 58, 0.85);
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  width: 160px;
  font-family: inherit;
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  padding: 0;
  transition: color var(--transition-base), transform var(--transition-base);
}

.search-box button:hover {
  color: var(--accent-cyan);
  transform: scale(1.1);
}

.theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(61, 224, 255, 0.2);
  transform: rotate(20deg);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
  transition: color var(--transition-base);
}

.mobile-menu-btn:hover {
  color: var(--accent-cyan);
}

/* ============ 面包屑 ============ */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.breadcrumb a:hover {
  color: var(--accent-cyan);
}

.breadcrumb span {
  margin: 0 8px;
}

/* ============ 主容器 ============ */
.main-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ============ Hero轮播 ============ */
.hero-carousel {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 24px 0 48px;
  min-height: 420px;
  background: var(--bg-secondary);
  box-shadow: var(--shadow-glow), 0 20px 60px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--glass-border);
}

.hero-carousel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(61, 224, 255, 0.05) 0%, transparent 40%, rgba(157, 110, 255, 0.05) 100%);
  pointer-events: none;
  z-index: 1;
}

.carousel-slide {
  display: none;
  padding: 60px 48px;
  min-height: 420px;
  align-items: center;
  position: relative;
}

.carousel-slide.active {
  display: flex;
  animation: fadeSlide 0.8s ease;
}

@keyframes fadeSlide {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-content {
  max-width: 600px;
  position: relative;
  z-index: 2;
}

.slide-tag {
  display: inline-block;
  background: rgba(61, 224, 255, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(61, 224, 255, 0.3);
  border-radius: 40px;
  padding: 4px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.slide-content h2 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.slide-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 28px;
  line-height: 1.8;
}

.slide-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-primary);
  color: #0b0e1a;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 40px;
  text-decoration: none;
  font-size: 1rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.slide-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.slide-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(61, 224, 255, 0.35), 0 0 40px rgba(157, 110, 255, 0.2);
}

.slide-cta:hover::before {
  opacity: 1;
}

.slide-visual {
  position: absolute;
  right: 40px;
  top: 50%;
  transform: translateY(-50%);
  width: 340px;
  height: 340px;
  opacity: 0.9;
  pointer-events: none;
  animation: floatVisual 6s ease-in-out infinite;
}

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

.carousel-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  padding: 0;
}

.carousel-dot:hover {
  background: rgba(255, 255, 255, 0.5);
}

.carousel-dot.active {
  background: var(--accent-cyan);
  width: 28px;
  border-radius: 6px;
  box-shadow: 0 0 12px rgba(61, 224, 255, 0.6);
}

/* ============ 数据统计 ============ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}

.stat-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: rgba(61, 224, 255, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(61, 224, 255, 0.1);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 6px;
}

/* ============ 通用区块 ============ */
.section {
  margin-bottom: 64px;
  position: relative;
}

.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 720px;
}

.section-header .accent-line {
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 3px;
  margin-bottom: 16px;
  position: relative;
}

.section-header .accent-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  filter: blur(6px);
  opacity: 0.6;
  border-radius: 3px;
}

/* ============ 卡片网格 ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(61, 224, 255, 0.06) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(61, 224, 255, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(61, 224, 255, 0.08);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  transition: transform var(--transition-base);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-5deg);
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ============ 文章列表 ============ */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.article-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-cool);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(157, 110, 255, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(157, 110, 255, 0.08);
}

.article-card:hover::after {
  transform: scaleX(1);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.article-meta .category {
  background: rgba(157, 110, 255, 0.15);
  color: var(--accent-purple);
  padding: 2px 12px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.75rem;
  border: 1px solid rgba(157, 110, 255, 0.2);
}

.article-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.5;
  transition: color var(--transition-base);
}

.article-card:hover h3 {
  color: var(--accent-cyan);
}

.article-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  flex: 1;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-cyan);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 18px;
  transition: gap var(--transition-base), color var(--transition-base);
}

.read-more:hover {
  gap: 10px;
  color: var(--accent-purple);
}

/* ============ FAQ ============ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.faq-item:hover {
  border-color: rgba(61, 224, 255, 0.3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.faq-item.open {
  border-color: rgba(61, 224, 255, 0.4);
  box-shadow: 0 4px 24px rgba(61, 224, 255, 0.08);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  padding: 20px 24px;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: inherit;
  transition: color var(--transition-base);
}

.faq-question:hover {
  color: var(--accent-cyan);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  transition: transform var(--transition-base), color var(--transition-base);
  color: var(--text-muted);
}

.faq-item.open .faq-question .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-cyan);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
}

/* ============ HowTo ============ */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  counter-reset: step;
}

.howto-step {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
  counter-increment: step;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  margin-top: 16px;
}

.howto-step:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 209, 102, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(255, 209, 102, 0.08);
}

.howto-step::before {
  content: counter(step);
  position: absolute;
  top: -16px;
  left: 24px;
  width: 36px;
  height: 36px;
  background: var(--gradient-warm);
  color: #0b0e1a;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 4px 16px rgba(255, 209, 102, 0.3);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.howto-step:hover::before {
  transform: scale(1.15);
  box-shadow: 0 6px 24px rgba(255, 209, 102, 0.5);
}

.howto-step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 12px 0 10px;
}

.howto-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ============ 客户评价 ============ */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  overflow: hidden;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: rgba(157, 110, 255, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(157, 110, 255, 0.08);
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 12px;
  right: 24px;
  font-size: 4rem;
  color: rgba(61, 224, 255, 0.12);
  font-family: Georgia, serif;
  line-height: 1;
  transition: color var(--transition-base), transform var(--transition-base);
}

.testimonial-card:hover::before {
  color: rgba(61, 224, 255, 0.25);
  transform: scale(1.1);
}

.testimonial-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

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

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 2px solid var(--border-subtle);
  transition: border-color var(--transition-base);
}

.testimonial-card:hover .testimonial-avatar {
  border-color: var(--accent-cyan);
}

.testimonial-author .name {
  font-weight: 700;
  font-size: 0.9rem;
}

.testimonial-author .role {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ============ 新闻中心 ============ */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 22px 24px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.news-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

.news-item:hover {
  transform: translateX(6px);
  border-color: rgba(61, 224, 255, 0.3);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.news-item:hover::before {
  transform: scaleY(1);
}

.news-date {
  flex-shrink: 0;
  text-align: center;
  min-width: 56px;
}

.news-date .day {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1.2;
  transition: color var(--transition-base);
}

.news-item:hover .news-date .day {
  color: var(--accent-purple);
}

.news-date .month {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.news-content h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  transition: color var(--transition-base);
}

.news-item:hover .news-content h3 {
  color: var(--accent-cyan);
}

.news-content p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ============ 团队 ============ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.team-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.team-card:hover {
  transform: translateY(-4px);
  border-color: rgba(157, 110, 255, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(157, 110, 255, 0.08);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: block;
  border: 2px solid var(--border-subtle);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.team-card:hover .team-avatar {
  transform: scale(1.08);
  border-color: var(--accent-purple);
}

.team-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-card .role {
  color: var(--accent-purple);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.team-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ============ 联系信息 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.contact-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: rgba(61, 224, 255, 0.3);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.contact-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.contact-card:hover .contact-icon {
  transform: scale(1.1);
}

.contact-card h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.contact-card p,
.contact-card a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color var(--transition-base);
  word-break: break-all;
}

.contact-card a:hover {
  color: var(--accent-cyan);
}

/* ============ 页脚 ============ */
.site-footer {
  border-top: 1px solid var(--glass-border);
  margin-top: 64px;
  padding: 48px 24px 32px;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-primary);
  opacity: 0.3;
}

.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-base), padding-left var(--transition-base);
  display: inline-block;
}

.footer-col a:hover {
  color: var(--accent-cyan);
  padding-left: 4px;
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

.footer-bottom a:hover {
  color: var(--accent-cyan);
}

/* ============ 返回顶部 ============ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0b0e1a;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
  box-shadow: 0 4px 20px rgba(61, 224, 255, 0.3);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(61, 224, 255, 0.45), 0 0 40px rgba(157, 110, 255, 0.3);
}

.back-to-top:active {
  transform: translateY(-2px) scale(0.95);
}

/* ============ 滚动动画 ============ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ 亮色模式 ============ */
body.light-mode {
  --bg-primary: #f5f7fc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-elevated: #f0f2f8;
  --text-primary: #0b0e1a;
  --text-secondary: #4a5578;
  --text-muted: #8892b0;
  --border-subtle: #e0e5f0;
  --shadow-glow: 0 0 30px rgba(61, 224, 255, 0.1);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(61, 224, 255, 0.15);
}

body.light-mode::before {
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(61, 224, 255, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(157, 110, 255, 0.08) 0%, transparent 60%);
}

body.light-mode .site-header {
  background: rgba(245, 247, 252, 0.8);
}

body.light-mode .site-header.scrolled {
  background: rgba(245, 247, 252, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

body.light-mode .slide-content h2 {
  background: linear-gradient(135deg, #0b0e1a 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.light-mode .slide-cta {
  color: #ffffff;
}

body.light-mode .stat-number {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.light-mode .howto-step::before {
  color: #ffffff;
}

body.light-mode .back-to-top {
  color: #ffffff;
}

body.light-mode .hero-carousel {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1), 0 0 30px rgba(61, 224, 255, 0.08);
}

body.light-mode .card,
body.light-mode .article-card,
body.light-mode .stat-card,
body.light-mode .faq-item,
body.light-mode .howto-step,
body.light-mode .testimonial-card,
body.light-mode .news-item,
body.light-mode .team-card,
body.light-mode .contact-card {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

body.light-mode .card:hover,
body.light-mode .article-card:hover,
body.light-mode .stat-card:hover,
body.light-mode .howto-step:hover,
body.light-mode .testimonial-card:hover,
body.light-mode .team-card:hover,
body.light-mode .contact-card:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1), 0 0 30px rgba(61, 224, 255, 0.08);
}

body.light-mode .search-box {
  background: rgba(255, 255, 255, 0.9);
}

body.light-mode .search-box:focus-within {
  background: #ffffff;
}

body.light-mode .theme-toggle {
  background: rgba(255, 255, 255, 0.9);
}

body.light-mode ::-webkit-scrollbar-track {
  background: #f0f2f8;
}

body.light-mode ::-webkit-scrollbar-thumb {
  background: #c8d0e0;
}

body.light-mode ::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .slide-visual {
    width: 240px;
    height: 240px;
    right: 20px;
    opacity: 0.5;
  }

  .slide-content h2 {
    font-size: 1.9rem;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 0 16px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(19, 23, 43, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  }

  body.light-mode .nav-links {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  }

  .nav-links.open {
    display: flex;
    animation: slideDown 0.3s ease;
  }

  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .mobile-menu-btn {
    display: flex;
  }

  .search-box {
    display: none;
  }

  .nav-container {
    height: 64px;
  }

  .logo {
    font-size: 1.15rem;
  }

  .logo-icon {
    width: 30px;
    height: 30px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-bottom: 40px;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .stat-card {
    padding: 20px 14px;
  }

  .hero-carousel {
    min-height: 360px;
    margin: 16px 0 36px;
    border-radius: var(--radius-md);
  }

  .carousel-slide {
    padding: 40px 24px;
    min-height: 360px;
  }

  .slide-content h2 {
    font-size: 1.5rem;
  }

  .slide-content p {
    font-size: 0.95rem;
  }

  .slide-visual {
    display: none;
  }

  .slide-cta {
    padding: 12px 26px;
    font-size: 0.92rem;
  }

  .section {
    margin-bottom: 48px;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }

  .section-header p {
    font-size: 0.92rem;
  }

  .card-grid,
  .article-list,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .howto-steps {
    grid-template-columns: 1fr;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }

  .breadcrumb {
    padding: 12px 16px 0;
    font-size: 0.8rem;
  }

  .main-container {
    padding: 0 16px;
  }

  .news-item {
    padding: 18px 16px;
    gap: 14px;
  }

  .news-date .day {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: 1fr;
  }

  .slide-content h2 {
    font-size: 1.25rem;
  }

  .slide-content p {
    font-size: 0.88rem;
    margin-bottom: 20px;
  }

  .slide-tag {
    font-size: 0.72rem;
    padding: 3px 12px;
  }

  .hero-carousel {
    min-height: 320px;
  }

  .carousel-slide {
    padding: 32px 18px;
    min-height: 320px;
  }

  .section-header h2 {
    font-size: 1.25rem;
  }

  .card,
  .article-card {
    padding: 22px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.92rem;
  }

  .faq-answer {
    padding: 0 18px;
  }

  .faq-item.open .faq-answer {
    padding: 0 18px 16px;
  }

  .howto-step {
    padding: 22px;
  }

  .contact-card {
    padding: 18px;
  }

  .footer-bottom {
    font-size: 0.75rem;
  }
}

/* ============ 无障碍与动效偏好 ============ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

/* ============ 打印样式 ============ */
@media print {
  .site-header,
  .back-to-top,
  .carousel-dots,
  .theme-toggle,
  .mobile-menu-btn,
  .search-box {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .card,
  .article-card,
  .faq-item,
  .howto-step,
  .testimonial-card,
  .news-item,
  .team-card,
  .contact-card {
    border: 1px solid #ddd;
    box-shadow: none;
  }
}