/* ===== 基础重置与变量 ===== */
:root {
  --primary: #00B8A0;
  --primary-dark: #009688;
  --primary-light: #00D4AA;
  --accent: #0088CC;
  --accent-light: #00A8E8;
  --secondary: #3b82f6;
  --gradient-primary: linear-gradient(135deg, #00D4AA 0%, #0088CC 100%);
  --gradient-hero: linear-gradient(135deg, #00B8A0 0%, #0066AA 100%);
  --dark: #0a1628;
  --dark-2: #112240;
  --dark-3: #1a365d;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-tertiary: #a0aec0;
  --bg-light: #f7fafc;
  --bg-gray: #edf2f7;
  --bg: #ffffff;
  --border: #e2e8f0;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --section-py: 100px;
  --font-sans: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

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

ul {
  list-style: none;
}

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

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

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.3s ease;
  background: rgba(10, 22, 40, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.navbar.navbar-light {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(10, 22, 40, 0.95);
}

.navbar.navbar-light.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.navbar-hero {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

.navbar-hero .logo-text {
  color: var(--dark);
}

.navbar-hero .nav-link {
  color: var(--text-secondary);
}

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

.navbar-hero .nav-link.active {
  color: var(--primary);
}

.navbar-hero.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-icon {
  display: flex;
  align-items: center;
}

.logo-icon img {
  height: 52px;
  width: auto;
  display: block;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: white;
  letter-spacing: 1px;
}

.navbar-light .logo-text {
  color: var(--dark);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  transition: color 0.2s;
  position: relative;
}

.navbar-light .nav-link {
  color: var(--text-secondary);
}

.nav-link:hover {
  color: white;
}

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

.nav-link.active {
  color: white;
}

.navbar-light .nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.nav-cta {
  padding: 8px 20px;
  background: var(--gradient-primary);
  border-radius: 100px;
  color: white !important;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 184, 160, 0.4);
}

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark);
  overflow: hidden;
  padding-top: 80px;
}

.hero-light {
  background: linear-gradient(180deg, #e8faf6 0%, #f0f9ff 50%, #ffffff 100%);
}

.hero-banner-img {
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 100%;
  overflow: hidden;
}

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

.hero-banner-overlay {
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, #f0f9ff 0%, rgba(240, 249, 255, 0.7) 20%, rgba(240, 249, 255, 0) 50%);
  z-index: 1;
}

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



.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #00D4AA 0%, transparent 70%);
  top: -100px;
  left: -100px;
  animation: floatGlow 8s ease-in-out infinite;
}

.glow-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #0088CC 0%, transparent 70%);
  bottom: -200px;
  right: -150px;
  animation: floatGlow 10s ease-in-out infinite reverse;
}

.glow-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #00B8A0 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.15;
  animation: pulseGlow 6s ease-in-out infinite;
}

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, 30px); }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.15; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.25; transform: translate(-50%, -50%) scale(1.15); }
}

.floating-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(0, 212, 170, 0.6);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(0, 212, 170, 0.8);
}

.p1 { top: 20%; left: 15%; animation: floatParticle 6s ease-in-out infinite; }
.p2 { top: 60%; left: 25%; animation: floatParticle 8s ease-in-out infinite 1s; }
.p3 { top: 30%; right: 20%; animation: floatParticle 7s ease-in-out infinite 2s; }
.p4 { top: 70%; right: 15%; animation: floatParticle 9s ease-in-out infinite 0.5s; }
.p5 { top: 45%; left: 50%; animation: floatParticle 5s ease-in-out infinite 3s; }
.p6 { top: 80%; left: 60%; animation: floatParticle 7.5s ease-in-out infinite 1.5s; }

@keyframes floatParticle {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.6; }
  50% { transform: translateY(-30px) scale(1.3); opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 860px;
  padding: 0 24px;
}

.hero-light .hero-content {
  text-align: left;
  max-width: 1200px;
  width: 100%;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge-light {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 184, 160, 0.2);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(0, 212, 170, 0.12);
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: 100px;
  color: var(--primary-light);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 28px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--primary-light);
  border-radius: 50%;
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-size: 56px;
  font-weight: 900;
  line-height: 1.2;
  color: white;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-title-light {
  color: var(--dark);
  font-size: 52px;
  max-width: 560px;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 40px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle-light {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 0 40px 0;
  font-size: 17px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-light .hero-actions {
  justify-content: flex-start;
  margin-bottom: 0;
}

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

.btn-light-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: white;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: 100px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  text-decoration: none;
}

.btn-sm {
  padding: 12px 24px;
  font-size: 14px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(0, 184, 160, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 184, 160, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-icon {
  width: 18px;
  height: 18px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: white;
  line-height: 1;
  margin-bottom: 6px;
}

.stat-unit {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary-light);
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: rgba(255, 255, 255, 0.15);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
  z-index: 10;
}

.scroll-indicator {
  width: 20px;
  height: 32px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
  0%, 100% { top: 6px; opacity: 1; }
  50% { top: 18px; opacity: 0.3; }
}

/* ===== 通用 Section ===== */
.section-header {
  margin-bottom: 56px;
  max-width: 640px;
}

.section-header.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 184, 160, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-tag.light {
  background: rgba(255, 255, 255, 0.15);
  color: var(--primary-light);
}

.section-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 公司简介 ===== */
.about-section {
  padding: 120px 0;
  background: var(--white);
}

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

.about-text p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 32px;
}

.value-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  transition: all 0.3s;
}

.value-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.value-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  color: white;
  flex-shrink: 0;
}

.value-icon svg {
  width: 24px;
  height: 24px;
}

.value-info h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.value-info p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}

.about-visual {
  display: flex;
  justify-content: center;
}

.visual-card {
  position: relative;
  width: 420px;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visual-orbit {
  position: relative;
  width: 100%;
  height: 100%;
}

.orbit-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px dashed rgba(0, 184, 160, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.ring-1 {
  width: 180px;
  height: 180px;
  animation: spin 20s linear infinite;
}

.ring-2 {
  width: 280px;
  height: 280px;
  animation: spin 30s linear infinite reverse;
}

.ring-3 {
  width: 380px;
  height: 380px;
  animation: spin 40s linear infinite;
}

@keyframes spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.orbit-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 28px;
  font-weight: 800;
  box-shadow: 0 0 40px rgba(0, 184, 160, 0.5);
  z-index: 5;
}

.orbit-node {
  position: absolute;
  width: 48px;
  height: 48px;
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  box-shadow: var(--shadow-md);
  z-index: 3;
}

.orbit-node svg {
  width: 24px;
  height: 24px;
}

.node-1 {
  top: calc(50% - 90px);
  left: 50%;
  transform: translateX(-50%);
}

.node-2 {
  top: 50%;
  right: calc(50% - 140px);
  transform: translateY(-50%);
}

.node-3 {
  bottom: calc(50% - 190px);
  left: 50%;
  transform: translateX(-50%);
}

/* ===== 产品卡片 ===== */
.products-section {
  padding: 120px 0;
  background: var(--bg-light);
}

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

.product-card {
  position: relative;
  padding: 48px;
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.card-glow {
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  transition: opacity 0.4s;
}

.product-card-travel .card-glow {
  background: #00D4AA;
}

.product-card-english .card-glow {
  background: #0088CC;
}

.product-card:hover .card-glow {
  opacity: 0.25;
}

.card-icon-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.card-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 16px;
  color: white;
}

.product-card-english .card-icon {
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
}

.card-icon svg {
  width: 32px;
  height: 32px;
}

.card-tag {
  padding: 4px 12px;
  background: rgba(0, 184, 160, 0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
}

.product-card-english .card-tag {
  background: rgba(0, 136, 204, 0.1);
  color: var(--accent);
}

.card-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-weight: 500;
}

.card-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 28px;
}

.card-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.card-features span {
  padding: 6px 14px;
  background: var(--bg-light);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-secondary);
}

.card-cta {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
}

.product-card-english .card-cta {
  color: var(--accent);
}

.card-cta svg {
  width: 18px;
  height: 18px;
  transition: transform 0.3s;
}

.product-card:hover .card-cta svg {
  transform: translateX(4px);
}

/* ===== APP 下载 ===== */
.download-section {
  padding: 100px 0;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}

.download-section::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(60px);
}

.download-content {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.download-info h2 {
  font-size: 36px;
  font-weight: 800;
  color: white;
  margin: 16px 0 20px;
  line-height: 1.3;
}

.download-info p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin-bottom: 32px;
}

.download-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  background: white;
  border-radius: 12px;
  color: var(--dark);
  transition: all 0.3s;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.download-btn svg {
  width: 28px;
  height: 28px;
}

.btn-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.btn-label {
  font-size: 11px;
  color: var(--text-muted);
}

.btn-name {
  font-size: 16px;
  font-weight: 700;
}

.download-qr {
  display: flex;
  justify-content: center;
}

.qr-card {
  padding: 32px;
  background: white;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-xl);
}

.qr-code {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 0 auto 16px;
}

.qr-pattern {
  width: 100%;
  height: 100%;
}

.qr-logo {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  background: white;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.qr-logo svg {
  width: 100%;
  height: 100%;
}

.qr-card p {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-light);
  border-top: 1px solid var(--border);
  padding: 64px 0 24px;
  color: var(--text-secondary);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.7;
}

.footer-logo .logo-icon img {
  height: 44px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h5 {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  margin-bottom: 12px;
  transition: color 0.2s;
}

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

.footer-bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--text-muted);
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom a {
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.police-icp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.police-icon {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  flex-shrink: 0;
  object-fit: contain;
}

/* ===== 产品页面通用 ===== */
.product-page {
  background: var(--bg-light);
}

.product-hero {
  position: relative;
  padding: 140px 0 100px;
  background: linear-gradient(180deg, #e6fffa 0%, var(--bg-light) 100%);
  overflow: hidden;
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(0, 212, 170, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(0, 136, 204, 0.1) 0%, transparent 50%);
}

.english-pattern {
  background:
    radial-gradient(circle at 80% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 20% 70%, rgba(0, 136, 204, 0.12) 0%, transparent 50%);
}

.product-hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.product-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: white;
  border: 1px solid rgba(0, 184, 160, 0.2);
  border-radius: 100px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.english-badge {
  color: var(--accent);
  border-color: rgba(0, 136, 204, 0.2);
}

.product-badge svg {
  width: 16px;
  height: 16px;
}

.product-hero-title {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.product-hero-tagline {
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.product-hero-tagline {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 20px;
}

.english-page .product-hero-tagline {
  color: var(--accent);
}

.product-hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.product-hero-slogans {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.slogan-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  color: var(--text-secondary);
}

.slogan-line {
  width: 24px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.product-hero-cta {
  display: flex;
  gap: 12px;
}

.english-btn {
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  box-shadow: 0 4px 20px rgba(0, 136, 204, 0.3);
}

/* ===== Hero CTA 卡片 + 按钮 ===== */
.hero-cta-cards {
  display: flex;
  gap: 14px;
  align-items: stretch;
  flex-wrap: wrap;
}

.cta-action-card {
  flex: 1;
  min-width: 220px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
  overflow: hidden;
}

.cta-action-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
  transition: width 0.25s ease;
}

.cta-action-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #bceadd;
}

.cta-action-card:hover::after {
  width: 6px;
}

.cta-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0, 184, 160, 0.12), rgba(0, 136, 204, 0.12));
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cta-card-icon svg {
  width: 22px;
  height: 22px;
}

.cta-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cta-card-body h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  margin: 0;
}

.cta-card-body p {
  font-size: 12px;
  color: var(--text-tertiary);
  margin: 0;
}

.cta-card-arrow {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.25s ease, background 0.25s ease;
}

.cta-card-arrow svg {
  width: 14px;
  height: 14px;
}

.cta-action-card:hover .cta-card-arrow {
  transform: translateX(3px);
}

/* 英语阅读蓝色主题 */
.cta-english .cta-card-icon {
  background: linear-gradient(135deg, rgba(0, 136, 204, 0.12), rgba(99, 102, 241, 0.12));
  color: var(--secondary);
}

.cta-english::after {
  background: var(--secondary);
}

.cta-english:hover {
  border-color: #c7d8f5;
}

.cta-english .cta-card-arrow {
  background: var(--secondary);
}

/* 实心主按钮 - 返回首页 */
.cta-solid-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 24px;
  min-width: 140px;
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(0, 184, 160, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  flex-shrink: 0;
}

.cta-solid-btn svg {
  width: 16px;
  height: 16px;
}

.cta-solid-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 184, 160, 0.45);
}

.cta-btn-english {
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  box-shadow: 0 6px 20px rgba(0, 136, 204, 0.35);
}

.cta-btn-english:hover {
  box-shadow: 0 10px 28px rgba(0, 136, 204, 0.45);
}

@media (max-width: 600px) {
  .hero-cta-cards {
    flex-direction: column;
  }
  
  .cta-solid-btn {
    min-width: 100%;
    padding: 14px 20px;
  }
}

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

.visual-mockup {
  position: relative;
  width: 100%;
  max-width: 500px;
}

.mockup-main {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.mockup-mobile {
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 140px;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  border: 4px solid white;
}

/* ===== 功能模块 ===== */
.features-section {
  padding: 100px 0;
  background: white;
}

.feature-modules {
  display: flex;
  flex-direction: column;
  gap: 100px;
}

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

.feature-number {
  font-size: 64px;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: 8px;
  font-family: 'Inter', sans-serif;
}

.feature-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-subtitle {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
}

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

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.list-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(0, 184, 160, 0.15);
  position: relative;
  margin-top: 3px;
}

.list-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
}

.feature-visual {
  display: flex;
  justify-content: center;
}

.feature-card {
  width: 100%;
  max-width: 480px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.feature-card img {
  width: 100%;
  display: block;
}

.mobile-card {
  max-width: 240px;
}

.showcase-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.showcase-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  transition: all 0.3s;
}

.showcase-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.showcase-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 12px;
  color: white;
  flex-shrink: 0;
}

.showcase-icon svg {
  width: 22px;
  height: 22px;
}

.showcase-item h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--text-primary);
}

.showcase-item p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

.app-badges-inline {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.app-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--dark);
  border-radius: 10px;
  color: white;
  font-size: 13px;
  font-weight: 500;
}

.app-badge svg {
  width: 22px;
  height: 22px;
}

/* ===== 用户反馈 ===== */
.testimonials-section {
  padding: 100px 0;
  background: var(--bg-light);
}

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

.testimonial-card {
  position: relative;
  padding: 32px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

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

.testimonial-type {
  display: inline-block;
  padding: 4px 12px;
  background: var(--gradient-primary);
  color: white;
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 16px;
}

.testimonial-quote {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-style: normal;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.author-avatar {
  width: 44px;
  height: 44px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 16px;
}

.author-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

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

/* ===== 英语阅读页面 ===== */
.english-hero {
  background: linear-gradient(180deg, #eff6ff 0%, var(--bg-light) 100%);
}

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

.english-hero-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
  max-width: 400px;
}

.eh-card {
  padding: 24px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all 0.3s;
}

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

.ehc-1 { animation: floatCard 4s ease-in-out infinite; }
.ehc-2 { animation: floatCard 4s ease-in-out infinite 0.5s; }
.ehc-3 { animation: floatCard 4s ease-in-out infinite 1s; }
.ehc-4 { animation: floatCard 4s ease-in-out infinite 1.5s; }

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

.ehc-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  border-radius: 14px;
  color: white;
}

.ehc-icon svg {
  width: 24px;
  height: 24px;
}

.ehc-title {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.ehc-num {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== 场景切换 ===== */
.scenes-section {
  padding: 100px 0;
  background: white;
}

.scene-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 56px;
}

.scene-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s;
  font-family: var(--font-sans);
}

.scene-tab svg {
  width: 18px;
  height: 18px;
}

.scene-tab:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.scene-tab.active {
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  border-color: transparent;
  color: white;
  box-shadow: 0 4px 16px rgba(0, 136, 204, 0.3);
}

.scene-panel {
  display: none;
  animation: fadeInUp 0.5s ease;
}

.scene-panel.active {
  display: block;
}

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

.scene-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.scene-content.reverse {
  direction: rtl;
}

.scene-content.reverse > * {
  direction: ltr;
}

.scene-text h3 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.scene-lead {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.scene-feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.sf-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
}

.sf-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  border-radius: 10px;
  color: white;
  flex-shrink: 0;
}

.sf-icon svg {
  width: 20px;
  height: 20px;
}

.sf-item h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--text-primary);
}

.sf-item p {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.scene-visual {
  display: flex;
  justify-content: center;
}

.phone-mockup {
  width: 280px;
  background: var(--dark);
  border-radius: 36px;
  padding: 12px;
  box-shadow: var(--shadow-xl);
}

.phone-screen {
  background: white;
  border-radius: 28px;
  overflow: hidden;
  min-height: 500px;
}

.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 20px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
}

.status-icons {
  display: flex;
  gap: 4px;
}

.status-icons span {
  width: 14px;
  height: 10px;
  background: var(--text-primary);
  border-radius: 2px;
  opacity: 0.7;
}

.screen-header {
  padding: 8px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.screen-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.screen-body {
  padding: 16px;
}

.class-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  background: var(--bg-light);
  border-radius: 12px;
  margin-bottom: 10px;
  border-left: 3px solid transparent;
}

.class-item.class-active {
  background: rgba(0, 136, 204, 0.08);
  border-left-color: var(--accent);
}

.class-time {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  width: 48px;
}

.class-info {
  flex: 1;
}

.class-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.class-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.class-status {
  font-size: 11px;
  padding: 3px 8px;
  background: var(--accent);
  color: white;
  border-radius: 100px;
  font-weight: 500;
}

.class-item:not(.class-active) .class-status {
  background: var(--text-muted);
}

.task-section {
  margin-top: 20px;
}

.task-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.task-badge {
  width: 22px;
  height: 22px;
  background: #fef3c7;
  color: #d97706;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.student-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
}

.greeting-hi {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.greeting-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.student-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.progress-card {
  margin: 0 16px 16px;
  padding: 16px;
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  border-radius: 16px;
  color: white;
}

.progress-title {
  font-size: 13px;
  opacity: 0.9;
  margin-bottom: 10px;
}

.progress-bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  background: white;
  border-radius: 100px;
  transition: width 0.5s;
}

.progress-stats {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  opacity: 0.8;
}

.learn-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding: 0 16px 16px;
}

.learn-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 8px;
  background: var(--bg-light);
  border-radius: 12px;
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
}

.learn-icon {
  font-size: 24px;
}

.multi-device-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.md-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
}

.md-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.md-icon svg {
  width: 28px;
  height: 28px;
}

.md-item h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--text-primary);
}

.md-item p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

.device-showcase {
  position: relative;
  width: 100%;
  height: 400px;
}

.device-desktop {
  position: absolute;
  top: 0;
  left: 0;
  width: 85%;
}

.device-screen {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
}

.desktop-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}

.desktop-nav {
  display: flex;
  gap: 6px;
}

.nav-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ddd;
}

.desktop-title {
  font-size: 12px;
  color: var(--text-muted);
}

.desktop-body {
  display: flex;
  height: 220px;
}

.sidebar {
  width: 140px;
  background: var(--dark);
  padding: 16px 12px;
}

.sidebar-item {
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 4px;
}

.sidebar-item.active {
  background: rgba(0, 212, 170, 0.2);
  color: var(--primary-light);
}

.main-area {
  flex: 1;
  padding: 16px;
}

.stat-row {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.stat-box {
  flex: 1;
  padding: 10px;
  background: var(--bg-light);
  border-radius: 8px;
}

.stat-val {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
}

.stat-lab {
  font-size: 10px;
  color: var(--text-muted);
}

.chart-area {
  height: 100px;
  background: var(--bg-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-muted);
}

.device-tablet {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 40%;
}

.tablet-content {
  padding: 20px;
}

.tablet-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.tablet-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  background: linear-gradient(135deg, rgba(0, 136, 204, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
  border-radius: 10px;
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}

.tc-icon {
  font-size: 24px;
}

/* ===== 课程卡片 ===== */
.courses-section {
  padding: 100px 0 60px;
  background: var(--bg-light);
}

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

.course-card {
  padding: 32px;
  background: white;
  border-radius: var(--radius-lg);
  transition: all 0.3s;
  box-shadow: var(--shadow-sm);
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.cc-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  color: white;
  margin-bottom: 20px;
}

.cc-icon svg {
  width: 28px;
  height: 28px;
}

.cc-icon-1 { background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%); }
.cc-icon-2 { background: linear-gradient(135deg, #00B8A0 0%, #0088CC 100%); }
.cc-icon-3 { background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); }
.cc-icon-4 { background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%); }
.cc-icon-5 { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.cc-icon-6 { background: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%); }

.course-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

/* ===== AI 伴学 ===== */
.ai-section {
  padding: 100px 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  position: relative;
  overflow: hidden;
}

.ai-section::before {
  content: '';
  position: absolute;
  top: -300px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(80px);
}

.ai-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.ai-text h2 {
  font-size: 36px;
  font-weight: 800;
  color: white;
  margin: 16px 0 20px;
  line-height: 1.3;
}

.ai-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin-bottom: 32px;
}

.ai-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ai-feature {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  backdrop-filter: blur(10px);
}

.af-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  border-radius: 14px;
  color: white;
  flex-shrink: 0;
}

.af-icon svg {
  width: 24px;
  height: 24px;
}

.ai-feature h4 {
  font-size: 16px;
  font-weight: 700;
  color: white;
  margin-bottom: 4px;
}

.ai-feature p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}

.ai-visual {
  display: flex;
  justify-content: center;
}

.ai-orb {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.orb-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.orb-r1 {
  width: 160px;
  height: 160px;
  animation: spin 15s linear infinite;
}

.orb-r2 {
  width: 240px;
  height: 240px;
  animation: spin 25s linear infinite reverse;
}

.orb-r3 {
  width: 320px;
  height: 320px;
  animation: spin 35s linear infinite;
}

.orb-core {
  position: relative;
  z-index: 5;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, #0088CC 0%, #6366f1 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 60px rgba(99, 102, 241, 0.6);
}

.orb-core svg {
  width: 50px;
  height: 50px;
}

.orb-particles {
  position: absolute;
  inset: 0;
}

.orb-particles span {
  position: absolute;
  width: 6px;
  height: 6px;
  background: rgba(99, 102, 241, 0.8);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(99, 102, 241, 1);
}

.orb-particles span:nth-child(1) { top: 10%; left: 50%; }
.orb-particles span:nth-child(2) { top: 25%; right: 20%; }
.orb-particles span:nth-child(3) { bottom: 25%; right: 15%; }
.orb-particles span:nth-child(4) { bottom: 10%; left: 50%; }
.orb-particles span:nth-child(5) { bottom: 25%; left: 20%; }
.orb-particles span:nth-child(6) { top: 25%; left: 15%; }

/* 英语下载区 */
.english-download {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 44px; }
  .section-title { font-size: 32px; }
  .about-content,
  .product-cards,
  .download-content,
  .product-hero-inner,
  .feature-module,
  .scene-content,
  .ai-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .about-visual,
  .download-qr,
  .product-hero-visual {
    order: -1;
  }
  .feature-module.feature-right .feature-visual {
    order: -1;
  }
  .testimonial-cards {
    grid-template-columns: 1fr 1fr;
  }
  .course-cards {
    grid-template-columns: 1fr 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* 平板导航栏收缩 */
  .nav-links {
    gap: 24px;
  }
  
  .nav-link {
    font-size: 14px;
  }
  
  .nav-cta {
    padding: 7px 16px;
    font-size: 13px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    gap: 20px;
  }
  .nav-link {
    font-size: 14px;
  }
  .nav-cta {
    padding: 6px 14px;
    font-size: 13px;
  }
  .hero-title {
    font-size: 34px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }
  .stat-divider {
    width: 48px;
    height: 1px;
  }
  .section-title {
    font-size: 26px;
  }
  .about-section,
  .products-section,
  .features-section,
  .testimonials-section,
  .courses-section,
  .ai-section {
    padding: 64px 0;
  }
  .product-card {
    padding: 32px;
  }
  .card-title {
    font-size: 26px;
  }
  .testimonial-cards,
  .course-cards,
  .scene-feature-grid {
    grid-template-columns: 1fr;
  }
  .product-hero-title {
    font-size: 38px;
  }
  .feature-title {
    font-size: 26px;
  }
  .scene-tabs {
    flex-wrap: wrap;
  }
  .footer-links {
    grid-template-columns: 1fr 1fr;
  }
  .download-buttons {
    flex-direction: column;
  }
  .download-btn {
    justify-content: center;
  }
}

/* ===== 明亮风格新增样式 ===== */

/* Hero 明亮网格与粒子 */
.hero-grid.light-grid {
  background-image:
    linear-gradient(rgba(0, 136, 204, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 136, 204, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 30% center, black 30%, transparent 60%);
  -webkit-mask-image: radial-gradient(ellipse at 30% center, black 30%, transparent 60%);
  opacity: 0.7;
}

.light-particles .particle {
  background: rgba(0, 184, 160, 0.5);
  box-shadow: 0 0 12px rgba(0, 212, 170, 0.6);
}

/* Hero 滚动指示明亮版 */
.hero-scroll-light {
  color: var(--text-muted);
}

.hero-scroll-light .scroll-indicator {
  border-color: rgba(0, 136, 204, 0.3);
}

.hero-scroll-light .scroll-indicator::before {
  background: var(--primary);
}

/* About 大图 */
.about-visual-large {
  margin-bottom: 56px;
}

.about-visual-sm {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}

.about-image-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.about-image-wrap img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-xl);
}

.about-image-glow {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  box-shadow: inset 0 0 80px rgba(0, 184, 160, 0.15);
  pointer-events: none;
}

.about-content-bottom {
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: end;
}

.about-content-align-end {
  padding-bottom: 8px;
}

.about-text-center p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-secondary);
  margin-bottom: 16px;
  text-align: center;
}

.about-values-grid {
  margin-top: 0;
}

/* 产品配图卡片 */
.product-cards-image {
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.product-card-image {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card-image {
  position: relative;
  height: 240px;
  overflow: hidden;
  background: var(--bg-light);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card-image:hover .card-image img {
  transform: scale(1.05);
}

.card-image-tag {
  position: absolute;
  top: 20px;
  left: 20px;
  padding: 6px 14px;
  background: rgba(0, 184, 160, 0.95);
  color: white;
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  backdrop-filter: blur(10px);
  z-index: 2;
}

.card-image-tag.english-tag {
  background: rgba(99, 102, 241, 0.95);
}

.card-image-vertical {
  height: 280px;
  background: linear-gradient(180deg, #0a1628 0%, #1e3a5f 100%);
}

.card-image-vertical img {
  object-fit: contain;
  object-position: center bottom;
  padding: 20px 20px 0 20px;
  height: 100%;
}

.card-image-light {
  background: linear-gradient(135deg, #e8faf6 0%, #f0f9ff 100%);
}

.card-image-light img {
  object-fit: cover;
  object-position: center;
  width: 100%;
  height: 100%;
}

.product-card-image .card-body {
  padding: 32px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card-image .card-title {
  font-size: 28px;
}

.product-card-image .card-cta {
  margin-top: auto;
}

/* 路书 Hero 大图 */
.hero-mockup-large {
  max-width: 100%;
  width: 100%;
}

.mockup-full {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

/* 场景截图 */
.scene-screenshot {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.scene-screenshot img {
  width: 100%;
  display: block;
}

.scene-screenshot-wide {
  max-width: 520px;
}

/* 课程配图卡片 */
.course-cards-image {
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.course-card-image {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

.course-card-image:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.cc-image {
  height: 200px;
  overflow: hidden;
  background: var(--bg-light);
}

.cc-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.course-card-image:hover .cc-image img {
  transform: scale(1.05);
}

.cc-body {
  padding: 24px;
  flex: 1;
}

.cc-body h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.cc-body p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

/* AI 伴学双图卡片 */
.cc-ai-wide {
  grid-column: span 2;
  flex-direction: row;
}

.cc-ai-images {
  display: flex;
  width: 50%;
  gap: 2px;
  background: var(--bg-light);
}

.cc-ai-img {
  position: relative;
  flex: 1;
  overflow: hidden;
}

.cc-ai-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cc-ai-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  font-size: 11px;
  font-weight: 600;
  border-radius: 100px;
  backdrop-filter: blur(4px);
}

.cc-ai-wide .cc-body {
  width: 50%;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.cc-ai-wide .cc-body h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.cc-ai-wide .cc-body p {
  font-size: 14px;
}

/* 明亮下载区 */
.download-light {
  background: linear-gradient(135deg, #e8faf6 0%, #f0f9ff 100%);
}

.download-light::before {
  background: radial-gradient(circle, rgba(0, 212, 170, 0.15) 0%, transparent 70%);
}

.download-light .download-info h2 {
  color: var(--dark);
}

.download-light .download-info p {
  color: var(--text-secondary);
}

.download-light .download-btn {
  background: var(--dark);
  color: white;
}

.download-light .download-btn:hover {
  background: var(--dark-2);
}

.download-light .btn-label {
  color: rgba(255, 255, 255, 0.6);
}

.download-light .btn-name {
  color: white;
}

.download-light .qr-card {
  background: white;
  box-shadow: var(--shadow-lg);
}

.download-light .qr-card p {
  color: var(--text-secondary);
}

/* 英语 Hero 配图 */
.english-hero-image {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.english-hero-image img {
  width: 100%;
  display: block;
}

/* 响应式 - 新增样式适配 */
@media (max-width: 1024px) {
  .about-content-bottom {
    grid-template-columns: 1fr;
  }
  
  .cc-ai-wide {
    grid-column: span 1;
    flex-direction: column;
  }
  
  .cc-ai-images {
    width: 100%;
    height: 200px;
  }
  
  .cc-ai-wide .cc-body {
    width: 100%;
    padding: 24px;
  }
}

@media (max-width: 768px) {
  .hero-banner-img {
    width: 100%;
    opacity: 0.15;
  }
  
  .hero-banner-overlay {
    width: 100%;
    background: linear-gradient(180deg, rgba(240, 249, 255, 0.8) 0%, #f0f9ff 100%);
  }
  
  .hero-light .hero-content {
    text-align: center;
    align-items: center;
  }
  
  .hero-title-light {
    font-size: 34px;
  }
  
  .hero-subtitle-light {
    margin: 0 auto 40px;
    text-align: center;
  }
  
  .hero-light .hero-actions {
    justify-content: center;
  }
  
  .product-cards-image {
    grid-template-columns: 1fr;
  }
  
  .course-cards-image {
    grid-template-columns: 1fr;
  }
  
  .card-image {
    height: 200px;
  }
}

/* ===== 首页下载区 - 统一明亮风格 ===== */
.download-unified {
  background: var(--bg);
  padding: var(--section-py) 0;
  position: relative;
}

.download-unified .section-header {
  margin-bottom: 60px;
}

.download-product-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.download-product-card {
  display: flex;
  flex-direction: column;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: inherit;
  position: relative;
}

.download-product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.dp-illustration {
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.dp-travel .dp-illustration {
  background: linear-gradient(135deg, #e8faf6 0%, #f0f9ff 100%);
}

.dp-english .dp-illustration {
  background: linear-gradient(135deg, #eef2ff 0%, #f0f9ff 100%);
}

.dp-illustration img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.1));
  transition: transform 0.4s ease;
}

.download-product-card:hover .dp-illustration img {
  transform: scale(1.04);
}

.dp-body {
  padding: 28px 30px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dp-body h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--dark);
  margin: 0;
}

.dp-body p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  flex: 1;
}

.dp-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  align-self: flex-start;
  margin-top: 8px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.dp-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.download-product-card:hover .dp-btn {
  transform: translateX(3px);
  background: #00a88a;
}

.dp-btn-alt {
  background: var(--secondary);
  color: white;
}

.download-product-card:hover .dp-btn-alt {
  background: #006eb3;
}

@media (max-width: 768px) {
  .download-product-cards {
    grid-template-columns: 1fr;
    max-width: 420px;
  }
  
  .dp-illustration {
    height: 180px;
  }
  
  .dp-body {
    padding: 22px 24px 26px;
  }
  
  .dp-body h3 {
    font-size: 20px;
  }
}
.lushu-hero-light {
  position: relative;
  background: linear-gradient(135deg, #e8faf6 0%, #f0f9ff 50%, #f5f7ff 100%);
  color: var(--dark);
  min-height: 620px;
  padding: 140px 0 100px;
  overflow: hidden;
}

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

.hero-light-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 184, 160, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 184, 160, 0.06) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at 70% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 50%, black 30%, transparent 70%);
}

.hero-light-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}

.light-glow-a {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.4) 0%, transparent 70%);
  top: 5%;
  right: 10%;
  animation: lightFloat 8s ease-in-out infinite;
}

.light-glow-b {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(0, 136, 204, 0.3) 0%, transparent 70%);
  bottom: -10%;
  right: -5%;
  animation: lightFloat 10s ease-in-out infinite reverse;
}

@keyframes lightFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.1); }
}

.floating-light-dots {
  position: absolute;
  inset: 0;
}

.floating-light-dots .l-dot {
  position: absolute;
  width: 6px;
  height: 6px;
  background: #00D4AA;
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(0, 212, 170, 0.6);
  opacity: 0.5;
  animation: lightDotFloat 6s ease-in-out infinite;
}

.l-dot-1 { top: 20%; left: 15%; animation-delay: 0s; }
.l-dot-2 { top: 30%; left: 30%; width: 4px; height: 4px; animation-delay: 1.5s; }
.l-dot-3 { top: 65%; left: 12%; animation-delay: 2s; }
.l-dot-4 { top: 75%; left: 28%; width: 5px; height: 5px; animation-delay: 1s; }
.l-dot-5 { top: 25%; left: 48%; width: 3px; height: 3px; animation-delay: 3s; }
.l-dot-6 { top: 50%; left: 22%; width: 4px; height: 4px; animation-delay: 0.5s; }

@keyframes lightDotFloat {
  0%, 100% { transform: translateY(0) translateX(0); opacity: 0.3; }
  50% { transform: translateY(-15px) translateX(8px); opacity: 0.7; }
}

.hero-light-inner {
  align-items: center;
  gap: 60px;
}

.hero-light-text {
  flex: 1;
  max-width: 500px;
}

.badge-light {
  background: white;
  border: 1px solid rgba(0, 184, 160, 0.2);
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.hero-light-title {
  color: var(--dark) !important;
  font-size: 60px;
}

.hero-light-tagline {
  color: var(--text-secondary) !important;
  font-size: 22px;
}

.slogan-light {
  color: var(--text-secondary) !important;
}

.slogan-light .slogan-line {
  background: linear-gradient(90deg, var(--primary), #0088CC) !important;
}

/* 插画主视觉 */
.hero-light-visual {
  flex: 1.1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-illustration-wrap {
  position: relative;
  width: 100%;
  max-width: 560px;
}

.illustration-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  height: 80%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.2) 0%, transparent 70%);
  filter: blur(40px);
  z-index: 0;
}

.hero-illustration {
  position: relative;
  z-index: 1;
  width: 100%;
  animation: illustrationFloat 6s ease-in-out infinite;
}

.hero-illustration img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 20px 40px rgba(0, 136, 204, 0.15));
}

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

/* 英语阅读Hero插画包装 */
.english-visual {
  flex: 1.1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.english-ill-wrap {
  position: relative;
  width: 100%;
  max-width: 520px;
  animation: heroFadeIn 1s ease 0.3s both;
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.eng-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  height: 80%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 136, 204, 0.25) 0%, transparent 70%);
  filter: blur(50px);
  z-index: 0;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

.english-hero-illus {
  position: relative;
  z-index: 1;
  width: 100%;
  animation: illustrationFloat 6s ease-in-out infinite;
}

.english-hero-illus img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 20px 40px rgba(0, 100, 180, 0.2));
}

.eng-float {
  position: absolute;
  padding: 10px 18px;
  background: white;
  border-radius: 100px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  z-index: 2;
  animation: badgeFloat 4s ease-in-out infinite;
}

.eng-float-1 {
  top: 18%;
  left: -5px;
  animation-delay: 0s;
}

.eng-float-1::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -6px;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--secondary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--secondary);
}

.eng-float-2 {
  bottom: 22%;
  right: 0px;
  animation-delay: 1.5s;
}

.eng-float-2::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -6px;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--primary);
}

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

/* ===== 产品页下载区 - 明亮风格单卡片 ===== */
.product-download-light {
  background: var(--bg);
  padding: var(--section-py) 0;
  position: relative;
}

.product-download-light .section-header {
  margin-bottom: 50px;
}

.product-download-single {
  max-width: 520px;
  margin: 0 auto;
}

.pd-single-card {
  display: flex;
  flex-direction: column;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: inherit;
}

.pd-single-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.pd-s-illus {
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.pd-single-travel .pd-s-illus {
  background: linear-gradient(135deg, #e8faf6 0%, #f0f9ff 100%);
}

.pd-single-english .pd-s-illus {
  background: linear-gradient(135deg, #eef2ff 0%, #f0f9ff 100%);
}

.pd-s-illus img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.1));
  transition: transform 0.4s ease;
}

.pd-single-card:hover .pd-s-illus img {
  transform: scale(1.04);
}

.pd-s-body {
  padding: 30px 34px 34px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
  align-items: center;
}

.pd-s-body h3 {
  font-size: 26px;
  font-weight: 700;
  color: var(--dark);
  margin: 0;
}

.pd-s-body p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.pd-s-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  margin-top: 12px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.pd-s-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.pd-single-card:hover .pd-s-btn {
  transform: translateY(-2px);
  background: #00a88a;
}

.pd-single-english .pd-s-btn {
  background: var(--primary);
}

.pd-single-english:hover .pd-s-btn {
  background: #00a88a;
}

/* ===== 用户评价板块 ===== */
.eng-testimonials {
  background: linear-gradient(180deg, #f0f6ff 0%, var(--bg) 100%);
  padding: 60px 0 100px;
  position: relative;
}

.eng-testimonials .section-header {
  margin-bottom: 48px;
}

.testimonial-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
}

.testimonial-card {
  background: white;
  border: 1px solid #e0e7f5;
  border-radius: var(--radius-lg);
  padding: 32px 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.testimonial-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary), #60a5fa);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0, 100, 180, 0.12);
  border-color: #c7d8f5;
}

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

.tm-stars {
  display: flex;
  gap: 4px;
}

.tm-stars svg {
  width: 18px;
  height: 18px;
  color: #fbbf24;
}

.tm-text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-primary);
  margin: 0;
  flex: 1;
}

.tm-user {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.tm-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  font-weight: 600;
  flex-shrink: 0;
}

.tm-info h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  margin: 0 0 2px;
}

.tm-info span {
  font-size: 13px;
  color: var(--text-tertiary);
}

@media (max-width: 900px) {
  .testimonial-cards {
    grid-template-columns: 1fr;
    max-width: 460px;
  }
}

@media (max-width: 768px) {
  .product-download-single {
    max-width: 420px;
  }
  
  .pd-s-illus {
    height: 200px;
  }
  
  .pd-s-body {
    padding: 24px 26px 28px;
  }
  
  .pd-s-body h3 {
    font-size: 22px;
  }
}

.float-badge {
  position: absolute;
  padding: 10px 18px;
  background: white;
  border-radius: 100px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  z-index: 2;
  animation: badgeFloat 4s ease-in-out infinite;
}

.float-badge-1 {
  top: 15%;
  left: -10px;
  animation-delay: 0s;
}

.float-badge-1::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -6px;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--primary);
}

.float-badge-2 {
  bottom: 20%;
  right: -5px;
  animation-delay: 1.5s;
}

.float-badge-2::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -6px;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: #0088CC;
  border-radius: 50%;
  box-shadow: 0 0 8px #0088CC;
}

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

/* 路书明亮Hero响应式 */
@media (max-width: 768px) {
  .lushu-hero-light {
    min-height: auto;
    padding: 120px 0 80px;
  }
  
  .hero-light-inner {
    flex-direction: column;
    gap: 40px;
  }
  
  .hero-light-text {
    text-align: center;
    max-width: 100%;
  }
  
  .hero-light-title {
    font-size: 42px;
  }
  
  .hero-illustration-wrap {
    max-width: 400px;
  }
  
  .float-badge {
    padding: 8px 14px;
    font-size: 12px;
  }
}
.lushu-hero-dark {
  position: relative;
  background: linear-gradient(135deg, #0a1628 0%, #0f2847 40%, #1e3a5f 100%);
  color: white;
  min-height: 680px;
  padding: 140px 0 120px;
  overflow: hidden;
}

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

.hero-dark-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 170, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 170, 0.08) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at 70% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 50%, black 20%, transparent 70%);
}

.hero-dark-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.hero-glow-a {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #00D4AA 0%, transparent 70%);
  top: 10%;
  right: 15%;
  animation: floatGlow 8s ease-in-out infinite;
}

.hero-glow-b {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #0088CC 0%, transparent 70%);
  bottom: -10%;
  right: -5%;
  animation: floatGlow 10s ease-in-out infinite reverse;
}

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.1); }
}

.floating-dots {
  position: absolute;
  inset: 0;
}

.floating-dots .dot {
  position: absolute;
  width: 4px;
  height: 4px;
  background: #00D4AA;
  border-radius: 50%;
  box-shadow: 0 0 10px #00D4AA, 0 0 20px rgba(0, 212, 170, 0.5);
  opacity: 0.7;
  animation: dotFloat 6s ease-in-out infinite;
}

.dot-1 { top: 15%; left: 10%; animation-delay: 0s; }
.dot-2 { top: 25%; left: 25%; width: 3px; height: 3px; animation-delay: 1s; }
.dot-3 { top: 60%; left: 8%; width: 5px; height: 5px; animation-delay: 2s; }
.dot-4 { top: 70%; left: 30%; animation-delay: 1.5s; }
.dot-5 { top: 20%; left: 45%; width: 3px; height: 3px; animation-delay: 3s; }
.dot-6 { top: 45%; left: 20%; animation-delay: 0.5s; }
.dot-7 { top: 80%; left: 15%; width: 4px; height: 4px; animation-delay: 2.5s; }
.dot-8 { top: 35%; left: 35%; width: 2px; height: 2px; animation-delay: 4s; }

@keyframes dotFloat {
  0%, 100% { transform: translateY(0) translateX(0); opacity: 0.4; }
  50% { transform: translateY(-20px) translateX(10px); opacity: 0.9; }
}

.hero-dark-inner {
  align-items: center;
}

.hero-dark-text {
  flex: 1;
  max-width: 520px;
}

.badge-dark {
  background: rgba(0, 212, 170, 0.15);
  border: 1px solid rgba(0, 212, 170, 0.3);
  color: #00D4AA;
}

.hero-dark-title {
  color: white !important;
  font-size: 64px;
  text-shadow: 0 0 40px rgba(0, 212, 170, 0.3);
}

.hero-dark-tagline {
  color: rgba(255, 255, 255, 0.85) !important;
  font-size: 22px;
}

.slogan-dark {
  color: rgba(255, 255, 255, 0.75) !important;
}

.slogan-dark .slogan-line {
  background: linear-gradient(90deg, #00D4AA, #0088CC) !important;
}

.btn-ghost-light {
  background: rgba(255, 255, 255, 0.08) !important;
  border: 1px solid rgba(255, 255, 255, 0.2) !important;
  color: white !important;
}

.btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.15) !important;
  border-color: rgba(255, 255, 255, 0.35) !important;
  color: white !important;
}

/* 悬浮手机 */
.hero-dark-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  height: 560px;
}

.phone-floating-wrap {
  position: relative;
  width: 300px;
  height: 580px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-glow-ring {
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.25) 0%, transparent 70%);
  animation: ringPulse 4s ease-in-out infinite;
}

.phone-glow-ring.ring-2 {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(0, 136, 204, 0.3) 0%, transparent 70%);
  animation: ringPulse 4s ease-in-out infinite 1s;
}

@keyframes ringPulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.1); opacity: 1; }
}

.phone-floating {
  position: relative;
  z-index: 2;
  width: 260px;
  height: 520px;
  animation: phoneFloat 5s ease-in-out infinite;
  filter: drop-shadow(0 20px 60px rgba(0, 0, 0, 0.5));
}

.phone-floating img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 32px;
}

@keyframes phoneFloat {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-15px) rotate(2deg); }
}

/* 路线发光节点 */
.route-node {
  position: absolute;
  width: 12px;
  height: 12px;
  background: #00D4AA;
  border-radius: 50%;
  box-shadow: 0 0 20px #00D4AA, 0 0 40px rgba(0, 212, 170, 0.6);
  z-index: 3;
  animation: nodePulse 3s ease-in-out infinite;
}

.node-a {
  top: 15%;
  left: 5%;
  width: 10px;
  height: 10px;
  animation-delay: 0s;
}

.node-b {
  top: 45%;
  right: 0%;
  width: 14px;
  height: 14px;
  animation-delay: 1s;
}

.node-c {
  bottom: 20%;
  left: 10%;
  width: 8px;
  height: 8px;
  animation-delay: 2s;
}

@keyframes nodePulse {
  0%, 100% { transform: scale(1); opacity: 0.8; box-shadow: 0 0 20px #00D4AA, 0 0 40px rgba(0, 212, 170, 0.6); }
  50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 30px #00D4AA, 0 0 60px rgba(0, 212, 170, 0.8); }
}

/* 底部到明亮区的过渡 */
.hero-dark-bottom-transition {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(180deg, transparent 0%, var(--bg) 100%);
  z-index: 1;
}

/* 导航栏在深色Hero上的样式 */
.navbar-product-hero {
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
}

.navbar-product-hero .logo-text {
  color: white;
}

.navbar-product-hero .nav-link {
  color: rgba(255, 255, 255, 0.75);
}

.navbar-product-hero .nav-link:hover {
  color: #00D4AA;
}

.navbar-product-hero .nav-link.active {
  color: #00D4AA;
}

.navbar-product-hero .nav-cta {
  background: rgba(0, 212, 170, 0.15) !important;
  border: 1px solid rgba(0, 212, 170, 0.4) !important;
  color: #00D4AA !important;
}

.navbar-product-hero .nav-cta:hover {
  background: rgba(0, 212, 170, 0.25) !important;
}

.navbar-product-hero.scrolled {
  background: rgba(255, 255, 255, 0.95) !important;
  border-bottom: 1px solid var(--border) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
  box-shadow: var(--shadow-sm) !important;
}

.navbar-product-hero.scrolled .logo-text {
  color: var(--dark) !important;
}

.navbar-product-hero.scrolled .nav-link {
  color: var(--text-secondary) !important;
}

.navbar-product-hero.scrolled .nav-link:hover,
.navbar-product-hero.scrolled .nav-link.active {
  color: var(--primary) !important;
}

.navbar-product-hero.scrolled .nav-cta {
  background: var(--primary) !important;
  border-color: var(--primary) !important;
  color: white !important;
}

/* ========================================
   全面响应式优化 - 平板与手机适配
   ======================================== */

/* --- 平板 (≤1024px) 通用调整 --- */
@media (max-width: 1024px) {
  .container,
  .nav-container {
    max-width: 960px;
    padding: 0 20px;
  }

  .hero-title {
    font-size: 44px;
  }

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

  .about-content,
  .product-cards,
  .download-content,
  .product-hero-inner,
  .feature-module,
  .scene-content,
  .ai-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-content-bottom {
    grid-template-columns: 1fr;
  }

  .about-visual,
  .download-qr,
  .product-hero-visual {
    order: -1;
  }

  .feature-module.feature-right .feature-visual {
    order: -1;
  }

  .testimonial-cards {
    grid-template-columns: 1fr 1fr;
  }

  .course-cards {
    grid-template-columns: 1fr 1fr;
  }

  .course-cards-image {
    grid-template-columns: 1fr 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .cc-ai-wide {
    grid-column: span 1;
    flex-direction: column;
  }

  .cc-ai-images {
    width: 100%;
    height: 200px;
  }

  .cc-ai-wide .cc-body {
    width: 100%;
    padding: 24px;
  }

  .hero-cta-cards {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-action-card,
  .cta-solid-btn {
    width: 100%;
    max-width: 360px;
  }

  .product-hero-inner {
    gap: 40px;
  }

  .product-hero-visual {
    max-width: 420px;
    margin: 0 auto;
  }

  .showcase-cards {
    grid-template-columns: 1fr;
  }
}

/* --- 手机 (≤768px) 通用调整 --- */
@media (max-width: 768px) {
  .container,
  .nav-container {
    padding: 0 16px;
  }

  /* 导航栏 - 紧凑间距 */
  .navbar {
    padding: 12px 0;
  }

  .logo-icon img {
    height: 40px;
  }

  .nav-links {
    gap: 16px;
  }

  .nav-link {
    font-size: 13px;
  }

  .nav-cta {
    padding: 6px 12px;
    font-size: 12px;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .hero-title {
    font-size: 32px;
    line-height: 1.25;
  }

  .hero-subtitle {
    font-size: 15px;
    line-height: 1.7;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .hero-actions .btn {
    justify-content: center;
    width: 100%;
  }

  .hero-badge {
    font-size: 12px;
    padding: 6px 14px;
  }

  /* 明亮英雄区 */
  .hero-banner-img {
    width: 100%;
    opacity: 0.15;
  }

  .hero-banner-overlay {
    width: 100%;
    background: linear-gradient(180deg, rgba(240, 249, 255, 0.85) 0%, #f0f9ff 100%);
  }

  .hero-light .hero-content {
    text-align: center;
    align-items: center;
  }

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

  .hero-subtitle-light {
    margin: 0 auto 32px;
    text-align: center;
  }

  .hero-light .hero-actions {
    justify-content: center;
  }

  /* 板块通用 */
  .section-title {
    font-size: 26px;
  }

  .section-desc {
    font-size: 15px;
  }

  .section-tag {
    font-size: 12px;
    padding: 5px 12px;
  }

  .about-section,
  .products-section,
  .features-section,
  .testimonials-section,
  .courses-section,
  .ai-section,
  .scenes-section {
    padding: 56px 0;
  }

  /* 产品卡片 */
  .product-cards-image {
    grid-template-columns: 1fr;
  }

  .product-card {
    padding: 28px 24px;
  }

  .card-title {
    font-size: 24px;
  }

  .card-image {
    height: 200px;
  }

  .card-features {
    flex-wrap: wrap;
    gap: 8px;
  }

  .card-features span {
    font-size: 12px;
    padding: 5px 10px;
  }

  /* 关于我们 */
  .about-visual-large {
    margin-bottom: 36px;
  }

  .about-visual-sm {
    max-width: 100%;
  }

  .about-text p {
    font-size: 15px;
    line-height: 1.8;
  }

  .value-item {
    padding: 16px;
  }

  .value-icon {
    width: 44px;
    height: 44px;
  }

  .value-icon svg {
    width: 22px;
    height: 22px;
  }

  .value-info h4 {
    font-size: 16px;
  }

  .value-info p {
    font-size: 13px;
  }

  /* 下载卡片 */
  .download-product-cards {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .dp-illustration {
    height: 180px;
  }

  .dp-body {
    padding: 22px 24px 26px;
  }

  .dp-body h3 {
    font-size: 20px;
  }

  .dp-body p {
    font-size: 14px;
  }

  .dp-btn {
    font-size: 14px;
    padding: 10px 20px;
  }

  /* 产品页 Hero */
  .lushu-hero-light,
  .english-hero,
  .product-hero {
    min-height: auto;
    padding: 110px 0 70px;
  }

  .product-hero-title {
    font-size: 36px;
  }

  .product-hero-tagline {
    font-size: 16px;
  }

  .product-hero-desc {
    font-size: 14px;
  }

  .product-badge {
    font-size: 12px;
    padding: 6px 14px;
  }

  .hero-illustration-wrap {
    max-width: 320px;
    margin: 0 auto;
  }

  .float-badge {
    font-size: 11px;
    padding: 6px 12px;
  }

  .float-badge-1 {
    top: 8%;
    left: 0;
  }

  .float-badge-2 {
    bottom: 12%;
    right: 0;
  }

  /* 功能模块 */
  .feature-title {
    font-size: 24px;
  }

  .feature-subtitle {
    font-size: 15px;
  }

  .feature-list li span:last-child {
    font-size: 14px;
  }

  .feature-number {
    font-size: 48px;
  }

  .showcase-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .showcase-item {
    padding: 16px;
  }

  .app-badges-inline {
    flex-wrap: wrap;
  }

  .app-badge {
    font-size: 13px;
    padding: 8px 16px;
  }

  /* 场景切换 */
  .scene-tabs {
    flex-wrap: wrap;
    gap: 8px;
  }

  .scene-tab {
    flex: 1;
    min-width: calc(33.33% - 8px);
    font-size: 13px;
    padding: 10px 12px;
    gap: 6px;
  }

  .scene-tab svg {
    width: 18px;
    height: 18px;
  }

  .scene-text h3 {
    font-size: 24px;
  }

  .scene-lead {
    font-size: 15px;
  }

  .scene-feature-grid {
    grid-template-columns: 1fr;
  }

  .sf-item {
    padding: 16px;
  }

  .sf-icon {
    width: 40px;
    height: 40px;
  }

  .sf-icon svg {
    width: 20px;
    height: 20px;
  }

  .multi-device-list {
    grid-template-columns: 1fr;
  }

  .md-item {
    padding: 16px;
  }

  /* 课程卡片 */
  .course-cards-image {
    grid-template-columns: 1fr;
  }

  .cc-image {
    height: 180px;
  }

  .cc-body {
    padding: 20px 22px 24px;
  }

  .cc-body h3 {
    font-size: 18px;
  }

  .cc-body p {
    font-size: 14px;
  }

  /* 用户评价 */
  .testimonial-cards {
    grid-template-columns: 1fr;
  }

  .testimonial-card {
    padding: 24px;
  }

  .testimonial-quote,
  .tm-text {
    font-size: 14px;
    line-height: 1.7;
  }

  /* 产品下载单卡 */
  .product-download-single {
    max-width: 420px;
    margin: 0 auto;
  }

  .pd-s-illus {
    height: 200px;
  }

  .pd-s-body {
    padding: 24px 26px 28px;
  }

  .pd-s-body h3 {
    font-size: 22px;
  }

  /* 页脚 */
  .footer-top {
    padding: 48px 0 32px;
    gap: 32px;
  }

  .footer-brand p {
    font-size: 14px;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .footer-col h5 {
    font-size: 14px;
    margin-bottom: 14px;
  }

  .footer-col a {
    font-size: 13px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 10px;
    padding: 20px 0;
    font-size: 12px;
    text-align: center;
  }

  .footer-icp {
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 10px;
  }

  .footer-icp .icp-sep {
    display: none;
  }

  .police-icp {
    font-size: 12px;
  }

  /* Hero滚动提示在手机上隐藏 */
  .hero-scroll {
    display: none;
  }

  /* 浮动粒子在手机上减弱 */
  .floating-particles,
  .floating-light-dots {
    opacity: 0.4;
  }

  /* 产品Hero slogan */
  .product-hero-slogans {
    gap: 12px;
  }

  .slogan-item {
    font-size: 14px;
  }

  /* CTA卡片 */
  .cta-action-card {
    padding: 16px 20px;
  }

  .cta-card-icon {
    width: 44px;
    height: 44px;
  }

  .cta-card-icon svg {
    width: 22px;
    height: 22px;
  }

  .cta-card-body h4 {
    font-size: 16px;
  }

  .cta-card-body p {
    font-size: 13px;
  }
}

/* --- 小屏手机 (≤480px) 极限适配 --- */
@media (max-width: 480px) {
  .container,
  .nav-container {
    padding: 0 14px;
  }

  /* 导航 - 进一步压缩 */
  .navbar {
    padding: 10px 0;
  }

  .logo-icon img {
    height: 36px;
  }

  .nav-links {
    gap: 10px;
  }

  .nav-link {
    font-size: 12px;
  }

  .nav-link:not(.nav-cta) {
    display: none;
  }

  .nav-link.nav-cta {
    display: inline-flex;
    padding: 6px 12px;
    font-size: 12px;
  }

  /* Hero */
  .hero {
    padding: 100px 0 60px;
  }

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

  .hero-title-light {
    font-size: 26px;
  }

  .hero-subtitle {
    font-size: 14px;
    margin-bottom: 28px;
  }

  .hero-badge {
    font-size: 11px;
    margin-bottom: 20px;
  }

  /* 板块 */
  .section-title {
    font-size: 22px;
  }

  .section-desc {
    font-size: 14px;
  }

  .about-section,
  .products-section,
  .features-section,
  .testimonials-section,
  .courses-section,
  .ai-section,
  .scenes-section,
  .download-unified {
    padding: 48px 0;
  }

  /* 产品页Hero */
  .lushu-hero-light,
  .english-hero,
  .product-hero {
    padding: 95px 0 60px;
  }

  .product-hero-title {
    font-size: 30px;
  }

  .hero-light-title {
    font-size: 30px;
  }

  .product-hero-tagline {
    font-size: 15px;
  }

  /* 场景tab - 两列布局 */
  .scene-tab {
    min-width: calc(50% - 6px);
    font-size: 12px;
    padding: 8px 10px;
  }

  .scene-tab:nth-child(3) {
    min-width: 100%;
  }

  /* 页脚 */
  .footer-links {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-bottom {
    font-size: 11px;
  }

  .police-icp .police-icon {
    width: 12px;
    height: 12px;
  }

  /* 浮动徽章隐藏防止溢出 */
  .float-badge {
    display: none;
  }

  /* 卡片内边距缩小 */
  .product-card,
  .testimonial-card,
  .dp-body,
  .pd-s-body,
  .cc-body {
    padding: 20px;
  }

  .card-title,
  .dp-body h3,
  .pd-s-body h3 {
    font-size: 20px;
  }

  .card-desc,
  .dp-body p,
  .pd-s-body p,
  .tm-text,
  .cc-body p {
    font-size: 13px;
  }

  /* CTA按钮 */
  .btn {
    font-size: 14px;
    padding: 12px 24px;
  }

  /* 价值观卡片 */
  .value-item {
    padding: 14px;
    gap: 12px;
  }

  .value-icon {
    width: 40px;
    height: 40px;
  }

  .value-icon svg {
    width: 20px;
    height: 20px;
  }

  .value-info h4 {
    font-size: 15px;
  }

  .value-info p {
    font-size: 12px;
  }
}

/* --- 横屏小手机优化 (≤667px且矮屏) --- */
@media (max-height: 500px) and (orientation: landscape) {
  .hero,
  .product-hero {
    min-height: auto;
    padding: 90px 0 50px;
  }

  .hero-title {
    font-size: 30px;
    margin-bottom: 12px;
  }

  .hero-subtitle {
    margin-bottom: 24px;
    font-size: 14px;
  }
}

/* --- 大屏桌面 (≥1440px) 优化 --- */
@media (min-width: 1440px) {
  .container,
  .nav-container {
    max-width: 1280px;
  }

  .hero-title {
    font-size: 64px;
  }

  .section-title {
    font-size: 42px;
  }
}

/* 防止溢出 - 全局防护 */
img,
video,
iframe {
  max-width: 100%;
  height: auto;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
}

body {
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}