:root {
  --brand-primary: #2b5a8c;
  --brand-primary-light: #3d78b5;
  --brand-primary-dark: #1e4266;
  --brand-secondary: #e87a5c;
  --brand-secondary-light: #f09a82;
  --brand-accent: #f2c94c;
  --brand-accent-light: #f7dc8a;
  --gradient-hero: linear-gradient(135deg, #2b5a8c 0%, #3d78b5 40%, #e87a5c 100%);
  --gradient-card: linear-gradient(135deg, rgba(43, 90, 140, 0.06) 0%, rgba(232, 122, 92, 0.06) 100%);
  --gradient-accent: linear-gradient(135deg, #e87a5c 0%, #f2c94c 100%);
  --bg-body: #f7f9fc;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.5);
  --text-primary: #1e2b3a;
  --text-secondary: #4a5c6e;
  --text-muted: #7a8a9a;
  --border-light: #dce3ea;
  --border-glass: rgba(255, 255, 255, 0.35);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(43, 90, 140, 0.12);
  --shadow-glow: 0 0 24px rgba(43, 90, 140, 0.18);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-base: 0.25s ease;
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --glass-blur: 16px;
}

[data-theme="dark"] {
  --brand-primary: #4a8fd4;
  --brand-primary-light: #6aa8e8;
  --brand-primary-dark: #2b5a8c;
  --brand-secondary: #f09a82;
  --brand-secondary-light: #f5b8a6;
  --brand-accent: #f7dc8a;
  --gradient-hero: linear-gradient(135deg, #1a2d42 0%, #2b5a8c 45%, #c96a4e 100%);
  --gradient-card: linear-gradient(135deg, rgba(74, 143, 212, 0.08) 0%, rgba(240, 154, 130, 0.08) 100%);
  --bg-body: #12181f;
  --bg-card: #1e2a36;
  --bg-glass: rgba(30, 42, 54, 0.78);
  --bg-glass-border: rgba(74, 143, 212, 0.18);
  --text-primary: #e8eef5;
  --text-secondary: #b0c0d0;
  --text-muted: #7a8a9a;
  --border-light: #2e3e4e;
  --border-glass: rgba(74, 143, 212, 0.15);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px rgba(74, 143, 212, 0.25);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.8;
  font-size: 16px;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--brand-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--brand-secondary);
}

ul,
ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 8px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--brand-primary);
  transition: transform var(--transition-bounce);
}

.logo:hover {
  transform: scale(1.04);
  color: var(--brand-primary);
}

.logo svg {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-bounce);
}

.logo:hover svg {
  box-shadow: var(--shadow-glow);
  transform: rotate(-4deg);
}

.nav-menu {
  display: flex;
  gap: 22px;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-menu a {
  color: var(--text-secondary);
  padding: 6px 0;
  position: relative;
  transition: color var(--transition-base);
}

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

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

.nav-menu a:hover::after {
  width: 100%;
}

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 40px;
  padding: 4px 6px 4px 16px;
  border: 1px solid var(--border-glass);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.search-box:focus-within {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(43, 90, 140, 0.12);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 6px 0;
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  width: 140px;
  font-family: inherit;
}

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

.search-box button {
  background: var(--gradient-accent);
  border: none;
  border-radius: 40px;
  padding: 6px 16px;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition-base), transform var(--transition-bounce), box-shadow var(--transition-base);
  font-family: inherit;
}

.search-box button:hover {
  opacity: 0.9;
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

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

.theme-toggle:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #fff;
  transform: rotate(20deg) scale(1.08);
  box-shadow: var(--shadow-glow);
}

.mobile-menu-btn {
  display: none;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-primary);
  transition: background var(--transition-base), transform var(--transition-bounce);
}

.mobile-menu-btn:hover {
  background: var(--brand-primary);
  color: #fff;
  transform: scale(1.05);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  width: 100%;
  padding: 10px 20px 20px;
  background: var(--bg-glass);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--border-glass);
  animation: slideDown 0.3s ease;
}

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

.mobile-nav a {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-base), padding-left var(--transition-base);
}

.mobile-nav a:hover {
  color: var(--brand-primary);
  padding-left: 8px;
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 16px 0 0;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.breadcrumb a:hover {
  color: var(--brand-primary);
}

.breadcrumb span {
  margin: 0 6px;
}

.hero {
  padding: 48px 0 72px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  border-bottom: none;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(242, 201, 76, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.6rem;
  line-height: 1.3;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.hero-content h1 span {
  color: var(--brand-accent);
  position: relative;
  display: inline-block;
}

.hero-content h1 span::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 6px;
  background: rgba(242, 201, 76, 0.3);
  border-radius: 3px;
  z-index: -1;
}

.hero-content .hero-desc {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 28px;
  max-width: 560px;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.hero-stat-item {
  text-align: left;
}

.hero-stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--brand-accent);
  line-height: 1.2;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 2px;
}

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

.carousel {
  position: relative;
  width: 100%;
  max-width: 480px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.25);
  background: var(--bg-glass);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-glass);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.carousel:hover {
  transform: translateY(-6px);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.3);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
  min-width: 100%;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.carousel-slide svg {
  width: 100%;
  max-width: 240px;
  height: auto;
  margin-bottom: 16px;
  border-radius: var(--radius-md);
  transition: transform var(--transition-smooth);
}

.carousel-slide:hover svg {
  transform: scale(1.04);
}

.carousel-slide h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.carousel-slide p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 14px 0;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-light);
  border: none;
  cursor: pointer;
  transition: background var(--transition-base), transform var(--transition-bounce), width var(--transition-smooth);
}

.carousel-dot.active {
  background: var(--gradient-accent);
  width: 28px;
  border-radius: 6px;
}

.carousel-dot:hover {
  transform: scale(1.2);
}

.section {
  padding: 72px 0;
  position: relative;
}

.section-header {
  margin-bottom: 44px;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
  opacity: 0.35;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 720px;
  margin-top: 8px;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: 2px;
  margin-top: 14px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-glass);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth), background var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-smooth);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-primary);
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.75;
}

.card .card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: auto;
}

.card .card-tag {
  display: inline-block;
  background: rgba(43, 90, 140, 0.1);
  color: var(--brand-primary);
  font-size: 0.75rem;
  padding: 3px 12px;
  border-radius: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.article-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-smooth);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-secondary);
}

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

.article-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.5;
}

.article-card .article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-card .article-summary {
  font-size: 0.92rem;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 16px;
  line-height: 1.75;
}

.article-card .read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-base), color var(--transition-base);
}

.article-card .read-more:hover {
  color: var(--brand-secondary);
  gap: 8px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glass);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--brand-primary);
}

.faq-item.active {
  border-color: var(--brand-secondary);
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: 20px 26px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  transition: background var(--transition-base), color var(--transition-base);
  gap: 12px;
}

.faq-question:hover {
  background: rgba(43, 90, 140, 0.04);
  color: var(--brand-primary);
}

.faq-question .faq-icon {
  font-size: 1.3rem;
  color: var(--brand-primary);
  transition: transform var(--transition-smooth), color var(--transition-base);
  flex-shrink: 0;
  font-weight: 300;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(43, 90, 140, 0.08);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--brand-secondary);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.3s ease;
  padding: 0 26px;
  opacity: 0;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 26px 22px;
  opacity: 1;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 24px;
  counter-reset: step-counter;
}

.howto-step {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 30px 24px 24px;
  border: 1px solid var(--border-glass);
  position: relative;
  counter-increment: step-counter;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.howto-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-primary);
}

.howto-step::before {
  content: counter(step-counter);
  position: absolute;
  top: -14px;
  left: 22px;
  background: var(--gradient-accent);
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(232, 122, 92, 0.35);
  transition: transform var(--transition-bounce);
}

.howto-step:hover::before {
  transform: scale(1.15) rotate(-8deg);
}

.howto-step h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  margin-top: 6px;
}

.howto-step p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.team-member {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.team-member:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-secondary);
}

.team-member svg {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  border-radius: 50%;
  transition: transform var(--transition-bounce);
}

.team-member:hover svg {
  transform: scale(1.1) rotate(4deg);
}

.team-member h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.team-member .role {
  font-size: 0.85rem;
  color: var(--brand-secondary);
  font-weight: 600;
  margin-bottom: 8px;
  margin-top: 2px;
}

.team-member p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.contact-info {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.contact-info:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.contact-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text-primary);
  position: relative;
  padding-bottom: 10px;
}

.contact-info h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.contact-info ul li {
  display: flex;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: padding-left var(--transition-base), color var(--transition-base);
}

.contact-info ul li:hover {
  padding-left: 6px;
  color: var(--text-primary);
}

.contact-info ul li:last-child {
  border-bottom: none;
}

.contact-info ul li strong {
  color: var(--text-primary);
  min-width: 80px;
  font-weight: 600;
  flex-shrink: 0;
}

.site-footer {
  background: var(--bg-glass);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--border-glass);
  padding: 56px 0 28px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 36px;
  margin-bottom: 36px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 1px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-base), padding-left var(--transition-base);
  display: inline-block;
}

.footer-col ul li a:hover {
  color: var(--brand-primary);
  padding-left: 4px;
}

.footer-col ul li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-muted);
  transition: color var(--transition-base);
}

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

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-bounce), box-shadow var(--transition-base);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: var(--shadow-glow);
}

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.card-grid.fade-in .card,
.article-list.fade-in .article-card,
.howto-steps.fade-in .howto-step,
.team-grid.fade-in .team-member {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible .card,
.fade-in.visible .article-card,
.fade-in.visible .howto-step,
.fade-in.visible .team-member {
  opacity: 1;
  transform: translateY(0);
}

.fade-in.visible .card:nth-child(1),
.fade-in.visible .article-card:nth-child(1),
.fade-in.visible .howto-step:nth-child(1),
.fade-in.visible .team-member:nth-child(1) {
  transition-delay: 0.05s;
}

.fade-in.visible .card:nth-child(2),
.fade-in.visible .article-card:nth-child(2),
.fade-in.visible .howto-step:nth-child(2),
.fade-in.visible .team-member:nth-child(2) {
  transition-delay: 0.1s;
}

.fade-in.visible .card:nth-child(3),
.fade-in.visible .article-card:nth-child(3),
.fade-in.visible .howto-step:nth-child(3),
.fade-in.visible .team-member:nth-child(3) {
  transition-delay: 0.15s;
}

.fade-in.visible .card:nth-child(4),
.fade-in.visible .article-card:nth-child(4),
.fade-in.visible .howto-step:nth-child(4),
.fade-in.visible .team-member:nth-child(4) {
  transition-delay: 0.2s;
}

.fade-in.visible .article-card:nth-child(5) {
  transition-delay: 0.25s;
}

.fade-in.visible .article-card:nth-child(6) {
  transition-delay: 0.3s;
}

.fade-in.visible .article-card:nth-child(7) {
  transition-delay: 0.35s;
}

.fade-in.visible .article-card:nth-child(8) {
  transition-delay: 0.4s;
}

.fade-in.visible .article-card:nth-child(9) {
  transition-delay: 0.45s;
}

.fade-in.visible .article-card:nth-child(10) {
  transition-delay: 0.5s;
}

[id] {
  scroll-margin-top: 80px;
}

::selection {
  background: var(--brand-primary);
  color: #fff;
}

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

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

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

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

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-content h1 {
    font-size: 2rem;
  }
  .hero-content .hero-desc {
    max-width: 100%;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    justify-content: center;
  }
  .carousel {
    max-width: 440px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .search-box input {
    width: 100px;
  }
  .header-inner {
    padding: 10px 16px;
  }
  .hero {
    padding: 36px 0 56px;
  }
  .hero-content h1 {
    font-size: 1.7rem;
  }
  .hero-content .hero-desc {
    font-size: 0.98rem;
  }
  .hero-stats {
    gap: 24px;
  }
  .hero-stat-number {
    font-size: 1.5rem;
  }
  .section {
    padding: 48px 0;
  }
  .section-header h2 {
    font-size: 1.5rem;
  }
  .section-header {
    margin-bottom: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 18px;
  }
  .article-list {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
  }
  .howto-steps {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 18px;
  }
  .team-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 18px;
  }
  .contact-info {
    padding: 28px 24px;
  }
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .search-box {
    display: none;
  }
  .hero-content h1 {
    font-size: 1.4rem;
  }
  .hero-content .hero-desc {
    font-size: 0.92rem;
  }
  .hero-stats {
    gap: 18px;
  }
  .hero-stat-number {
    font-size: 1.3rem;
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
  .article-list {
    grid-template-columns: 1fr;
  }
  .howto-steps {
    grid-template-columns: 1fr;
  }
  .team-grid {
    grid-template-columns: 1fr;
  }
  .carousel {
    max-width: 100%;
  }
  .carousel-slide {
    padding: 28px 20px;
  }
  .container {
    padding: 0 16px;
  }
  .section {
    padding: 40px 0;
  }
  .card {
    padding: 22px 18px;
  }
  .article-card {
    padding: 22px 18px;
  }
  .faq-question {
    padding: 16px 20px;
    font-size: 0.95rem;
  }
  .faq-answer {
    padding: 0 20px;
  }
  .faq-item.active .faq-answer {
    padding: 0 20px 18px;
  }
  .contact-info {
    padding: 24px 20px;
  }
  .contact-info ul li {
    flex-direction: column;
    gap: 2px;
  }
  .contact-info ul li strong {
    min-width: auto;
  }
}

@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;
  }
}

@media print {
  .site-header,
  .back-to-top,
  .mobile-nav,
  .search-box,
  .theme-toggle,
  .mobile-menu-btn {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .card,
  .article-card,
  .faq-item,
  .contact-info {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  .hero {
    background: none;
    color: #000;
  }
  .hero-content h1,
  .hero-content .hero-desc,
  .hero-stat-number,
  .hero-stat-label {
    color: #000;
    text-shadow: none;
  }
}