:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-glass: rgba(255, 255, 255, 0.72);
  --text: #1a2634;
  --text-secondary: #4a5a6e;
  --primary: #0b1a2f;
  --accent: #2b5f9e;
  --accent-light: #e8f0fe;
  --accent-glow: rgba(43, 95, 158, 0.28);
  --border: #d9e2ec;
  --border-glass: rgba(255, 255, 255, 0.4);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 16px 40px rgba(11, 26, 47, 0.14);
  --shadow-glass: 0 8px 32px rgba(11, 26, 47, 0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 40px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Songti SC", "SimSun", Georgia, serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-glass: rgba(22, 27, 34, 0.78);
  --text: #e6edf3;
  --text-secondary: #9ca9b8;
  --primary: #e6edf3;
  --accent: #58a6ff;
  --accent-light: #1c2a3a;
  --accent-glow: rgba(88, 166, 255, 0.3);
  --border: #30363d;
  --border-glass: rgba(255, 255, 255, 0.08);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.45);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(43, 95, 158, 0.06) 0%, transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(43, 95, 158, 0.05) 0%, transparent 40%);
  color: var(--text);
  line-height: 1.75;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 12% 8%, rgba(88, 166, 255, 0.07) 0%, transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(88, 166, 255, 0.05) 0%, transparent 40%);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--primary);
  text-decoration: underline;
}

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

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

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 6px;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--surface-glass);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--primary);
  letter-spacing: 0.5px;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.03);
  text-decoration: none;
}

.logo svg {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover svg {
  transform: rotate(180deg);
}

.nav-links {
  display: flex;
  gap: 22px;
  list-style: none;
  font-size: 0.95rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  position: relative;
  transition: color var(--transition), border-color var(--transition);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-glow));
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

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

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

.search-toggle,
.menu-toggle,
.theme-toggle {
  background: var(--surface-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 11px;
  cursor: pointer;
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1;
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.search-toggle:hover,
.menu-toggle:hover,
.theme-toggle:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--accent-glow);
}

.search-toggle:active,
.menu-toggle:active,
.theme-toggle:active {
  transform: translateY(0) scale(0.96);
}

.menu-toggle {
  display: none;
}

.search-bar {
  display: none;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  background: var(--surface-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.search-bar.active {
  display: block;
  animation: slideDown 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-bar form {
  display: flex;
  gap: 8px;
  max-width: 520px;
  margin: 0 auto;
}

.search-bar input {
  flex: 1;
  padding: 11px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-bar input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-bar button {
  padding: 11px 22px;
  background: linear-gradient(135deg, var(--accent), #1a3a5c);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  transition: transform var(--transition), box-shadow var(--transition);
}

.search-bar button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--accent-glow);
}

.breadcrumb {
  padding: 18px 0 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 6px;
  align-items: center;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 6px;
  color: var(--border);
  font-size: 1rem;
}

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

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

.hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  margin: 24px 0 32px;
  background: linear-gradient(135deg, #0b1a2f 0%, #1a3a5c 50%, #0d2847 100%);
  min-height: 340px;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-glass);
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(88, 166, 255, 0.22) 0%, transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(43, 95, 158, 0.28) 0%, transparent 50%),
    radial-gradient(circle at 50% 120%, rgba(255, 255, 255, 0.06) 0%, transparent 60%);
  z-index: 0;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 22%, rgba(255, 255, 255, 0.85) 50%, transparent 50%),
    radial-gradient(1px 1px at 28% 68%, rgba(255, 255, 255, 0.7) 50%, transparent 50%),
    radial-gradient(1.8px 1.8px at 45% 18%, rgba(255, 255, 255, 0.9) 50%, transparent 50%),
    radial-gradient(1px 1px at 62% 82%, rgba(255, 255, 255, 0.6) 50%, transparent 50%),
    radial-gradient(1.4px 1.4px at 78% 35%, rgba(255, 255, 255, 0.8) 50%, transparent 50%),
    radial-gradient(1px 1px at 88% 62%, rgba(255, 255, 255, 0.65) 50%, transparent 50%),
    radial-gradient(1.2px 1.2px at 35% 88%, rgba(255, 255, 255, 0.75) 50%, transparent 50%),
    radial-gradient(1px 1px at 55% 50%, rgba(255, 255, 255, 0.55) 50%, transparent 50%);
  background-repeat: repeat;
  background-size: 100% 100%;
  opacity: 0.9;
  z-index: 0;
  pointer-events: none;
  animation: twinkle 6s ease-in-out infinite alternate;
}

@keyframes twinkle {
  0% {
    opacity: 0.6;
  }
  100% {
    opacity: 1;
  }
}

.hero-slides {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-slide {
  min-width: 100%;
  padding: 52px 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: #ffffff;
}

.hero-slide h1 {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: 1px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
  animation: fadeInUp 0.8s ease both;
}

.hero-slide p {
  font-size: 1.05rem;
  opacity: 0.92;
  max-width: 640px;
  margin-bottom: 26px;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.35);
  animation: fadeInUp 0.8s 0.15s ease both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-slide .hero-cta {
  display: inline-block;
  background: rgba(255, 255, 255, 0.95);
  color: #0b1a2f;
  padding: 13px 30px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 1rem;
  align-self: flex-start;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  animation: fadeInUp 0.8s 0.3s ease both;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hero-slide .hero-cta:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), 0 0 0 4px rgba(255, 255, 255, 0.15);
  text-decoration: none;
  background: #ffffff;
}

.hero-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 2;
}

.hero-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), width var(--transition);
  padding: 0;
}

.hero-dots button:hover {
  background: rgba(255, 255, 255, 0.7);
}

.hero-dots button.active {
  background: #ffffff;
  transform: scale(1.2);
  width: 24px;
  border-radius: var(--radius-pill);
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.stat-card {
  background: var(--surface-glass);
  border-radius: var(--radius);
  padding: 30px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

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

.stat-number {
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 8px;
  font-weight: 500;
}

.section {
  margin: 60px 0;
}

.section-title {
  font-size: 1.7rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--primary);
  position: relative;
  padding-left: 18px;
  letter-spacing: 0.3px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), var(--accent-glow));
  border-radius: 2px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 30px;
  padding-left: 18px;
}

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

.card {
  background: var(--surface-glass);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

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

.card:hover::after {
  opacity: 0.35;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--primary);
  position: relative;
  z-index: 1;
  transition: color var(--transition);
}

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

.card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  position: relative;
  z-index: 1;
}

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

.article-item {
  background: var(--surface-glass);
  border-radius: var(--radius);
  padding: 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  position: relative;
  overflow: hidden;
}

.article-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), transparent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.article-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

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

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

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

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

.article-meta time {
  font-variant-numeric: tabular-nums;
}

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

.read-more {
  font-weight: 600;
  font-size: 0.9rem;
  align-self: flex-start;
  color: var(--accent);
  transition: transform var(--transition), color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more:hover {
  transform: translateX(4px);
  text-decoration: none;
  color: var(--primary);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--surface-glass);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.faq-item.open {
  border-color: var(--accent);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 24px;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: inherit;
  transition: background var(--transition), color var(--transition);
}

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

.faq-question .arrow {
  font-size: 1rem;
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
  color: var(--accent);
}

.faq-item.open .faq-question .arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 640px;
  padding: 0 24px 22px;
}

.howto-steps {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.howto-step {
  background: var(--surface-glass);
  border-radius: var(--radius);
  padding: 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
  padding-left: 78px;
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.howto-step:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.howto-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 22px;
  top: 26px;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent), #1a3a5c);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 4px 12px var(--accent-glow);
  transition: transform var(--transition);
}

.howto-step:hover::before {
  transform: scale(1.1) rotate(-6deg);
}

.howto-step h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--primary);
}

.howto-step p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 22px;
}

.team-card {
  background: var(--surface-glass);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.team-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.team-avatar {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, #2b5f9e, #0b1a2f);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.6rem;
  font-weight: 700;
  box-shadow: 0 8px 24px var(--accent-glow);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.team-avatar::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: linear-gradient(135deg, var(--accent), transparent) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition);
}

.team-card:hover .team-avatar {
  transform: scale(1.08);
  box-shadow: 0 12px 32px var(--accent-glow);
}

.team-card:hover .team-avatar::after {
  opacity: 1;
}

.team-card h4 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--primary);
}

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

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.contact-item {
  background: var(--surface-glass);
  border-radius: var(--radius);
  padding: 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.contact-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.contact-item:hover::before {
  transform: scaleX(1);
}

.contact-item h4 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--primary);
  transition: color var(--transition);
}

.contact-item:hover h4 {
  color: var(--accent);
}

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

.site-footer {
  background: linear-gradient(160deg, var(--primary) 0%, #0a1422 100%);
  color: #c9d4e0;
  padding: 52px 0 26px;
  margin-top: 80px;
  font-size: 0.9rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

[data-theme="dark"] .site-footer {
  background: linear-gradient(160deg, #0a0e14 0%, #06090d 100%);
}

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

.footer-col h4 {
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

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

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

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

.footer-col a {
  color: #a8b8cc;
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

.footer-col a:hover {
  color: #ffffff;
  padding-left: 4px;
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
  color: #8fa0b8;
}

.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #1a3a5c);
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 20px var(--accent-glow);
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  z-index: 900;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}

.back-to-top.visible {
  display: flex;
  animation: popIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: scale(0.5);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 12px 32px var(--accent-glow);
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.75s cubic-bezier(0.4, 0, 0.2, 1), transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

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

.lazy-img {
  background: linear-gradient(135deg, var(--accent-light), var(--border));
  border-radius: var(--radius);
  min-height: 120px;
  position: relative;
  overflow: hidden;
}

.lazy-img::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shimmer 1.6s infinite;
}

@keyframes shimmer {
  100% {
    left: 100%;
  }
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--surface-glass);
  border-top: 1px solid var(--border);
  padding: 12px 0;
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
}

.mobile-menu.active {
  display: flex;
  animation: slideDown 0.3s ease;
}

.mobile-menu a {
  padding: 12px 24px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
  border-left: 3px solid transparent;
}

.mobile-menu a:hover {
  background: var(--accent-light);
  color: var(--accent);
  text-decoration: none;
  padding-left: 30px;
  border-left-color: var(--accent);
}

@media (max-width: 820px) {
  .nav-links {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    min-height: 300px;
  }

  .hero-slide h1 {
    font-size: 1.6rem;
  }

  .hero-slide {
    padding: 38px 26px;
  }

  .hero-slide p {
    font-size: 0.98rem;
  }

  .section-title {
    font-size: 1.45rem;
  }

  .section {
    margin: 48px 0;
  }

  .howto-step {
    padding-left: 66px;
  }

  .howto-step::before {
    left: 18px;
    width: 34px;
    height: 34px;
  }

  .back-to-top {
    bottom: 18px;
    right: 18px;
    width: 42px;
    height: 42px;
    font-size: 1.15rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-slide h1 {
    font-size: 1.35rem;
    letter-spacing: 0.5px;
  }

  .hero-slide {
    padding: 32px 20px;
  }

  .hero-slide .hero-cta {
    padding: 11px 24px;
    font-size: 0.92rem;
  }

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

  .stat-card {
    padding: 24px 16px;
  }

  .card {
    padding: 24px 20px;
  }

  .article-item {
    padding: 22px 20px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

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

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

  .howto-step {
    padding: 22px 20px 22px 62px;
  }

  .howto-step::before {
    left: 16px;
    top: 22px;
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  }

  .section-title {
    font-size: 1.3rem;
  }

  .section-subtitle {
    font-size: 0.92rem;
  }
}

@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .site-header,
  .back-to-top,
  .hero-dots,
  .search-bar,
  .mobile-menu {
    display: none !important;
  }

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

  .card,
  .article-item,
  .faq-item,
  .howto-step,
  .team-card,
  .contact-item {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
}