:root {
  --primary: #4a90b8;
  --primary-light: #6baed6;
  --accent: #7ec8e3;
  --accent-glow: #a8dce8;
  --gold: #5ba4cf;
  --gold-light: #7ec8e3;
  --surface: #ffffff;
  --surface-dim: #f0f8ff;
  --surface-dark: #2c5f7c;
  --text: #2c3e50;
  --text-light: #6b8a9e;
  --text-on-dark: #e0f0fa;
  --border: #d4eaf5;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(74, 144, 184, 0.08);
  --shadow-lg: 0 12px 48px rgba(74, 144, 184, 0.12);
}

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

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, #e8f4f8 0%, #f0f8ff 50%, #e3f2fd 100%);
  min-height: 100vh;
  line-height: 1.8;
  overflow-x: hidden;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e8f4f8 0%, #d1ecf5 30%, #b8e0ef 60%, #a0d4e8 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(126, 200, 227, 0.4) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(91, 164, 207, 0.25) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(168, 220, 232, 0.35) 0%, transparent 40%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

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

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(74, 144, 184, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 184, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(74, 144, 184, 0.25);
  border-radius: 50%;
  animation: float linear infinite;
}

@keyframes float {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(74, 144, 184, 0.2);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--primary);
  margin-bottom: 2rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-light);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 3rem;
}

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

.hero-stat-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 4px;
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: var(--text-light);
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

.hero-scroll svg { width: 20px; height: 20px; }

/* ===== NAV ===== */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  transition: box-shadow 0.3s;
}

.nav-bar.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 900;
}

.nav-links {
  display: flex;
  gap: 0.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-light);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 6px;
  transition: all 0.2s;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
  background: rgba(126, 200, 227, 0.15);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  transition: 0.3s;
}

/* ===== SECTIONS ===== */
.section {
  padding: 6rem 2rem;
}

.section-alt { background: var(--surface-dim); }

.container {
  max-width: 80vw;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 50px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-light);
  max-width: 640px;
  margin: 0 auto;
}

/* ===== PLATFORM CARDS ===== */
.platform {
  margin-bottom: 6rem;
}

.platform:last-child { margin-bottom: 0; }

.platform-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 3rem;
}

.platform-hero.reverse { direction: rtl; }
.platform-hero.reverse > * { direction: ltr; }

.platform-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.platform-visual-bg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  font-weight: 900;
  color: rgba(255,255,255,0.08);
  letter-spacing: 4px;
}

.platform-visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.1), transparent);
}

.platform-visual-content {
  position: relative;
  z-index: 2;
  padding: 2rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
  letter-spacing: 1px;
  width: fit-content;
  margin-bottom: 0.75rem;
}

.platform-num {
  font-size: 6rem;
  font-weight: 900;
  color: rgba(255,255,255,0.15);
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  line-height: 1;
}

.platform-info h2 {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.platform-info .subtitle {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1rem;
}

.platform-info p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 1.5rem;
}

.platform-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: rgba(126, 200, 227, 0.12);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 50px;
  border: 1px solid rgba(126, 200, 227, 0.25);
}

/* ===== KEY METRICS ===== */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s;
}

.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}

.metric-icon {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.metric-value {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.2;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* ===== DETAIL GRID ===== */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all 0.3s;
}

.detail-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.detail-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.detail-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.detail-card p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===== PLATFORM COLORS ===== */
.color-tongji {
  background: linear-gradient(135deg, #5b9bd5, #7ec8e3);
}
.color-qingrui {
  background: linear-gradient(135deg, #6baed6, #a0d4e8);
}
.color-donghua {
  background: linear-gradient(135deg, #4a90b8, #7ec8e3);
}
.color-jiaoda {
  background: linear-gradient(135deg, #3a7ca5, #6baed6);
}

.bg-tongji { color: #5b9bd5; }
.bg-qingrui { color: #6baed6; }
.bg-donghua { color: #4a90b8; }
.bg-jiaoda { color: #3a7ca5; }

.color-weina {
  background: linear-gradient(135deg, #3170a7, #5b9bd5);
}
.color-donghua-gn {
  background: linear-gradient(135deg, #2e8b8b, #5bb8b8);
}
.color-shisu {
  background: linear-gradient(135deg, #5b6ea8, #8599cc);
}
.color-guanggu {
  background: linear-gradient(135deg, #3a8a8a, #6bc4c4);
}
.color-yiqi {
  background: linear-gradient(135deg, #4a6f8a, #7aadcc);
}
.color-6g {
  background: linear-gradient(135deg, #2878a8, #52b0e0);
}

.icon-weina { background: rgba(49, 112, 167, 0.12); color: #3170a7; }
.icon-donghua-gn { background: rgba(46, 139, 139, 0.12); color: #2e8b8b; }
.icon-shisu { background: rgba(91, 110, 168, 0.12); color: #5b6ea8; }
.icon-guanggu { background: rgba(58, 138, 138, 0.12); color: #3a8a8a; }
.icon-yiqi { background: rgba(74, 111, 138, 0.12); color: #4a6f8a; }
.icon-6g { background: rgba(40, 120, 168, 0.12); color: #2878a8; }

/* ===== COMPARISON ===== */
.comparison-table-wrap {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.comparison-table th {
  background: var(--primary);
  color: rgba(255,255,255,0.95);
  padding: 1rem 1.2rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.comparison-table td {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.comparison-table tr:nth-child(even) td { background: var(--surface-dim); }
.comparison-table tr:hover td { background: rgba(126, 200, 227, 0.06); }

.comparison-table td:first-child {
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
}

/* ===== TIMELINE ===== */
.timeline {
  position: relative;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--primary));
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 2rem;
  position: relative;
}

.timeline-item:nth-child(odd) { flex-direction: row-reverse; }

.timeline-content {
  width: 45%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  transition: all 0.3s;
}

.timeline-content:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--surface);
  box-shadow: 0 0 0 3px var(--accent);
  z-index: 2;
}

.timeline-date {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.timeline-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.3rem;
}

.timeline-desc {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.footer {
  background: linear-gradient(135deg, #2c5f7c, #3a7ca5);
  color: var(--text-on-dark);
  padding: 4rem 2rem 2rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
}

.footer h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
}

.footer p {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
}

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

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

.footer-links a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}

.footer-links a:hover { color: #fff; }

.footer-bottom {
  max-width: 1200px;
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.15);
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
}

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

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

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .platform-hero {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .platform-hero.reverse { direction: ltr; }
  
  .hero-stats { gap: 1.5rem; }
  
  .timeline::before { left: 20px; }
  .timeline-item,
  .timeline-item:nth-child(odd) { flex-direction: column; padding-left: 50px; }
  .timeline-content { width: 100%; }
  .timeline-dot { left: 20px; }
  
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  .nav-toggle { display: block; }
}

@media (max-width: 600px) {
  .section { padding: 3rem 1rem; }
  .hero h1 { font-size: 2rem; }
  .metrics-row { grid-template-columns: 1fr 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
}

/* Color-specific card icons */
.icon-tongji { background: rgba(91, 155, 213, 0.12); color: #5b9bd5; }
.icon-qingrui { background: rgba(107, 174, 214, 0.12); color: #6baed6; }
.icon-donghua { background: rgba(74, 144, 184, 0.12); color: #4a90b8; }
.icon-jiaoda { background: rgba(58, 124, 165, 0.12); color: #3a7ca5; }

/* Highlight box */
.highlight-box {
  background: linear-gradient(135deg, rgba(126, 200, 227, 0.08), rgba(168, 220, 232, 0.08));
  border: 1px solid rgba(126, 200, 227, 0.2);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2rem 0;
}

.highlight-box h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.highlight-box ul {
  list-style: none;
  padding: 0;
}

.highlight-box li {
  font-size: 0.9rem;
  color: var(--text);
  padding: 0.4rem 0;
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.7;
}

.highlight-box li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* Synergy section */
.synergy-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.2rem;
  margin: 3rem 0;
}

.synergy-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s;
}

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

.synergy-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 1rem;
}

.synergy-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.synergy-card p {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.7;
}

@media (max-width: 1100px) {
  .synergy-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 700px) {
  .synergy-grid { grid-template-columns: 1fr 1fr; }
}

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

/* Flow chain */
.flow-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 3rem 0;
  padding: 2rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius);
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem 1.5rem;
  color: rgba(255,255,255,0.95);
}

.flow-step-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.flow-step-label {
  font-size: 0.82rem;
  font-weight: 500;
}

.flow-arrow {
  color: rgba(255,255,255,0.7);
  font-size: 1.2rem;
  font-weight: 700;
  padding: 0 0.3rem;
}

@media (max-width: 600px) {
  .flow-step { padding: 0.5rem 0.8rem; }
  .flow-step-icon { width: 36px; height: 36px; font-size: 1rem; }
  .flow-step-label { font-size: 0.7rem; }
}

/* ===== DETAIL PAGE STYLES ===== */
.detail-hero {
  position: relative;
  min-height: 50vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #e8f4f8 0%, #d1ecf5 30%, #b8e0ef 60%, #a0d4e8 100%);
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}

.detail-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(126, 200, 227, 0.4) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(91, 164, 207, 0.25) 0%, transparent 40%);
}

.detail-hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 50px;
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(74, 144, 184, 0.2);
  margin-bottom: 2rem;
  transition: all 0.3s;
}

.back-link:hover {
  background: rgba(255,255,255,0.9);
  transform: translateX(-4px);
}

.detail-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.detail-hero .platform-visual {
  aspect-ratio: 4/3;
}

.detail-hero .platform-info h1 {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.detail-hero .platform-info .subtitle {
  font-size: 1.05rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.2rem;
}

.detail-hero .platform-info p {
  font-size: 1rem;
  color: var(--text);
  line-height: 2;
}

.detail-body {
  padding: 4rem 2rem 6rem;
  max-width: 1200px;
  margin: 0 auto;
}

.detail-body .section-label {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 50px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.detail-body h2 {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 2rem;
}

.detail-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  margin: 3rem 0 1.5rem;
}

.next-prev-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.next-prev-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s;
}

.next-prev-nav a:hover {
  background: var(--surface-dim);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

@media (max-width: 900px) {
  .detail-hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .detail-hero { padding: 5rem 1.5rem 3rem; }
  .detail-hero .platform-info h1 { font-size: 1.6rem; }
}

/* === 详情页交互效果 === */
.detail-card {
  transition: all 0.3s ease;
  cursor: pointer;
}
.detail-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(74, 144, 184, 0.15);
  background: linear-gradient(135deg, #ffffff 0%, #f0f8ff 100%);
}
.detail-card:active {
  transform: scale(0.98);
}

.metric-card {
  transition: all 0.3s ease;
  cursor: pointer;
}
.metric-card:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 6px 20px rgba(74, 144, 184, 0.12);
}
.metric-card:active {
  transform: scale(0.97);
}

.back-link {
  transition: all 0.3s ease;
}
.back-link:hover {
  transform: translateX(-4px);
  color: var(--accent);
}
.back-link:active {
  transform: translateX(-2px) scale(0.98);
}

.next-prev-nav a {
  transition: all 0.3s ease;
}
.next-prev-nav a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(74, 144, 184, 0.15);
}
.next-prev-nav a:active {
  transform: scale(0.96);
}

/* 详情页卡片浅蓝色背景 */
.detail-body {
  background: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(240,248,255,0.95) 100%);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  margin: 2rem auto;
  padding: 2.5rem;
  box-shadow: 0 4px 24px rgba(74, 144, 184, 0.08);
}

/* 详情页标签浅蓝色 */
.platform-tags .tag {
  background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
  border-color: rgba(74, 144, 184, 0.2);
}