/* ========================================
   算力超级工厂 - Landing Page Styles
   ======================================== */

/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --bg-primary: #06090F;
  --bg-secondary: #0D1117;
  --bg-card: #111827;
  --bg-card-hover: #1A1F2E;
  --accent-blue: #00B4D8;
  --accent-blue-dark: #0077B6;
  --accent-gold: #F59E0B;
  --accent-gold-light: #FBBF24;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border-color: #1E293B;
  --border-light: #2D3748;

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --section-padding: 120px;
  --container-max: 1200px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 0.3s var(--ease-out);
  --transition-slow: 0.6s var(--ease-out);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* === Navigation === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(6, 9, 15, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}

.logo-text {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-img {
  height: 36px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-base);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  transition: width var(--transition-base);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 24px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 180, 216, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 180, 216, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-outline:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(0, 180, 216, 0.05);
}

/* === Hero Section === */
.hero {
  position: relative;
  min-height: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(6, 9, 15, 0.95) 0%,
    rgba(6, 9, 15, 0.5) 35%,
    rgba(6, 9, 15, 0.8) 80%,
    rgba(6, 9, 15, 1) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 16px 24px 24px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(0, 180, 216, 0.1);
  border: 1px solid rgba(0, 180, 216, 0.2);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-blue);
  margin-bottom: 16px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: clamp(28px, 4.5vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text {
  background: linear-gradient(90deg, #00D4FF, #0077B6, #F5A623);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(13px, 1.4vw, 15px);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  font-family: 'Inter', sans-serif;
}

.hero-stat-unit {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent-blue);
}

.hero-stat-label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.hero-stat-divider {
  width: 1px;
  height: 32px;
  background: var(--border-color);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent-blue), transparent);
  animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
  0% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.5; transform: scaleY(0.6); }
  100% { opacity: 1; transform: scaleY(1); }
}

/* === Video Showcase Section === */
.video-showcase {
  padding: 60px 0 12px;
  background: #06090F;
  position: relative;
  overflow: hidden;
}

.video-showcase-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.video-showcase-header {
  text-align: center;
  margin-bottom: 16px;
}

.video-showcase-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.video-showcase-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.video-wrapper {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow:
    0 0 0 1px rgba(0, 180, 216, 0.05),
    0 24px 60px rgba(0, 0, 0, 0.5),
    0 0 80px rgba(0, 180, 216, 0.06);
  transition: box-shadow 0.6s var(--ease-out);
}

.video-wrapper:hover {
  box-shadow:
    0 0 0 1px rgba(0, 180, 216, 0.15),
    0 32px 80px rgba(0, 0, 0, 0.6),
    0 0 120px rgba(0, 180, 216, 0.1);
}

.showcase-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-controls {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: linear-gradient(to top, rgba(6, 9, 15, 0.9) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.video-wrapper:hover .video-controls {
  opacity: 1;
}

.video-play-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.video-play-btn:hover {
  background: rgba(0, 180, 216, 0.3);
  border-color: var(--accent-blue);
}

.video-progress {
  flex: 1;
  height: 3px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  overflow: hidden;
}

.video-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-blue-dark));
  border-radius: 2px;
  transition: width 0.1s linear;
}

.video-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  white-space: nowrap;
  flex-shrink: 0;
}

.video-glow {
  position: absolute;
  inset: -1px;
  border-radius: 20px;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(0, 180, 216, 0.08), transparent 40%, transparent 60%, rgba(245, 158, 11, 0.05));
}

/* === Stats Bar === */
.stats-bar {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 40px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 180, 216, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  flex-shrink: 0;
}

.stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  font-family: 'Inter', sans-serif;
}

.stat-suffix {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent-blue);
}

.stat-label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* === Section Common === */
.section {
  padding: var(--section-padding) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-blue);
  margin-bottom: 16px;
  padding: 6px 14px;
  background: rgba(0, 180, 216, 0.08);
  border-radius: 4px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* === Opportunity Section === */
.opportunity {
  background: var(--bg-primary);
}

.opportunity-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.opportunity-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px 32px;
  transition: all var(--transition-base);
}

.opportunity-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 180, 216, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 180, 216, 0.1);
}

.opp-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 180, 216, 0.15), rgba(0, 119, 182, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  margin-bottom: 24px;
}

.opportunity-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.opportunity-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.opp-highlight {
  padding: 16px 20px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.opp-number {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent-gold);
  font-family: 'Inter', sans-serif;
}

.opp-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* === Advantages Section === */
.advantages {
  background: var(--bg-secondary);
}

.advantages-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.advantages-text .section-title {
  text-align: left;
}

.advantages-text .section-desc {
  text-align: left;
  margin-bottom: 40px;
}

.advantage-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.advantage-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.advantage-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 180, 216, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  flex-shrink: 0;
  margin-top: 2px;
}

.advantage-item h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.advantage-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.advantages-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4/3;
}

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

.image-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(6, 9, 15, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 10px;
}

.badge-number {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-blue);
}

.badge-text {
  font-size: 12px;
  color: var(--text-secondary);
}

/* === Products Section === */
.products {
  background: var(--bg-primary);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  position: relative;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 180, 216, 0.2);
}

.product-card.featured {
  border-color: var(--accent-blue);
  background: linear-gradient(180deg, rgba(0, 180, 216, 0.05) 0%, var(--bg-card) 30%);
  box-shadow: 0 0 40px rgba(0, 180, 216, 0.1);
}

.product-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 16px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  white-space: nowrap;
}

.product-header {
  margin-bottom: 24px;
}

.product-tier {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-blue);
  margin-bottom: 8px;
  display: block;
}

.product-header h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-desc {
  font-size: 14px;
  color: var(--text-muted);
}

.product-price {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.price-currency {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-secondary);
  vertical-align: top;
}

.price-amount {
  font-size: 48px;
  font-weight: 800;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  line-height: 1;
}

.price-unit {
  font-size: 16px;
  color: var(--text-muted);
  margin-left: 4px;
}

.price-custom {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
}

.product-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.product-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-secondary);
}

.product-features li svg {
  color: var(--accent-blue);
  flex-shrink: 0;
}

/* === Campus Section === */
.campus {
  background: var(--bg-secondary);
}

.campus-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.campus-image {
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4/3;
}

.campus-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-out);
}

.campus-image:hover img {
  transform: scale(1.03);
}

.campus-text .section-title {
  text-align: left;
}

.campus-text .section-desc {
  text-align: left;
  margin-bottom: 32px;
}

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

.campus-feature {
  text-align: center;
}

.campus-feature-value {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent-blue);
  font-family: 'Inter', sans-serif;
  margin-bottom: 4px;
}

.campus-feature-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* === Process Section === */
.process {
  background: var(--bg-primary);
}

.process-timeline {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 1000px;
  margin: 0 auto;
}

.process-step {
  flex: 1;
  text-align: center;
  padding: 0 20px;
}

.step-number {
  font-size: 48px;
  font-weight: 800;
  color: rgba(0, 180, 216, 0.15);
  font-family: 'Inter', sans-serif;
  margin-bottom: 16px;
  line-height: 1;
}

.step-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.process-connector {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), rgba(0, 180, 216, 0.2));
  margin-top: 24px;
  flex-shrink: 0;
}

/* === Trust Section === */
.trust {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

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

.trust-text {
  margin-bottom: 48px;
}

.trust-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.trust-logo-item {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 1px;
  opacity: 0.5;
  transition: opacity var(--transition-base);
}

.trust-logo-item:hover {
  opacity: 1;
}

/* === FAQ Section === */
.faq {
  background: var(--bg-primary);
}

.faq-grid {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.faq-item:hover,
.faq-item.active {
  border-color: rgba(0, 180, 216, 0.3);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition-base);
}

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

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

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-blue);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out);
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* === CTA Section === */
.cta-section {
  position: relative;
  padding: 120px 0;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
}

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

.cta-overlay {
  position: absolute;
  inset: 0;
  background: rgba(6, 9, 15, 0.88);
  backdrop-filter: blur(4px);
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-input {
  flex: 1;
  padding: 14px 18px;
  background: rgba(17, 24, 39, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition-base);
}

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

.form-input:focus {
  border-color: var(--accent-blue);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

.cta-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 16px;
}

/* === Footer === */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo {
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
}

.footer-links h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links a,
.footer-links p {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: color var(--transition-base);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-legal a:hover {
  color: var(--accent-blue);
}

/* === Animations === */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

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

[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.animate-in:nth-child(2) { transition-delay: 0.1s; }
.animate-in:nth-child(3) { transition-delay: 0.2s; }
.animate-in:nth-child(4) { transition-delay: 0.3s; }
.animate-in:nth-child(5) { transition-delay: 0.4s; }

[data-animate]:nth-child(2) { transition-delay: 0.1s; }
[data-animate]:nth-child(3) { transition-delay: 0.2s; }
[data-animate]:nth-child(4) { transition-delay: 0.3s; }

/* === Responsive === */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .advantages-layout,
  .campus-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .advantages-image {
    order: -1;
  }

  .products-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .opportunity-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .process-timeline {
    flex-direction: column;
    align-items: center;
  }

  .process-connector {
    width: 2px;
    height: 40px;
    background: linear-gradient(180deg, var(--accent-blue), rgba(0, 180, 216, 0.2));
    margin: 0;
  }

  .process-step {
    padding: 0;
    max-width: 400px;
  }

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

  .video-showcase {
    padding: 60px 0 60px;
  }

  .video-wrapper {
    border-radius: 14px;
  }

  .video-glow {
    border-radius: 14px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(6, 9, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-actions {
    display: none;
  }

  .hero-content {
    padding: 60px 24px 80px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  .hero-stat-divider {
    width: 40px;
    height: 1px;
  }

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

  .campus-features {
    flex-wrap: wrap;
    gap: 24px;
  }

  .form-row {
    flex-direction: column;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .trust-logos {
    gap: 24px;
  }

  .video-showcase {
    padding: 48px 0 48px;
  }

  .video-showcase-header {
    margin-bottom: 32px;
  }

  .video-controls {
    padding: 12px 14px;
    gap: 10px;
  }

  .video-label {
    display: none;
  }
}

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

  .hero-title {
    font-size: 32px;
  }

  .section-title {
    font-size: 26px;
  }
}