/* 基础样式和重置 */
:root {
  --primary-color: #4a6cf7;
  --primary-dark: #3551c7;
  --primary-light: #eef1ff;
  --secondary-color: #f55f8d;
  --text-color: #333;
  --text-light: #666;
  --background-color: #fff;
  --background-light: #f5f8ff;
  --background-dark: #1e293b;
  --border-color: #e0e0e0;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --font-family: 'Noto Sans SC', sans-serif;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --border-radius: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--background-color);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
}

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

a:hover {
  color: var(--primary-dark);
}

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
  font-family: var(--font-family);
  transition: var(--transition);
}

.container {
  width: 95%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 20px;
}

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

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
  font-weight: 800;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 700px;
  margin: 1.5rem auto 0;
  line-height: 1.8;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-align: center;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: white;
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

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

.btn-lg {
  padding: 14px 30px;
  font-size: 1.1rem;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  padding: 15px 0;
  z-index: 1000;
  transition: all 0.3s ease;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
}

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

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

.logo img {
  height: 36px;
  margin-right: 10px;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s ease;
}

.logo:hover h1 {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  gap: 0.5rem;
}

.nav-link {
  color: var(--text-color);
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
  font-size: 0.95rem;
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.nav-link:hover {
  color: var(--primary-color);
  background: rgba(74, 108, 247, 0.05);
}

.nav-link:hover::before {
  transform: translateX(-50%) scaleX(1);
}

.language-switcher {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-right: 1rem;
}

.lang-btn {
  padding: 6px 12px;
  border: 2px solid var(--primary-color);
  background-color: transparent;
  color: var(--primary-color);
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: var(--font-family);
}

.lang-btn:hover {
  background-color: var(--primary-light);
  transform: translateY(-2px);
}

.lang-btn.active {
  background-color: var(--primary-color);
  color: white;
  box-shadow: 0 2px 8px rgba(74, 108, 247, 0.3);
}

.mobile-language-switcher {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  margin-top: 1rem;
}

.mobile-language-switcher .lang-btn {
  flex: 1;
  text-align: center;
}

.auth-buttons {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.auth-buttons .btn-outline {
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 12px;
  transition: all 0.3s ease;
  background: transparent;
}

.auth-buttons .btn-outline:hover {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
}

.auth-buttons .btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 12px;
  border: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
}

.auth-buttons .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(74, 108, 247, 0.4);
}

.mobile-menu-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--text-color);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-menu-toggle i {
  pointer-events: none;
  user-select: none;
}

.mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
  z-index: 999;
  display: none;
  transform: translateY(-100%);
  transition: transform 0.3s ease;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.mobile-menu.active {
  transform: translateY(0);
  display: block;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  padding: 1rem;
}

.mobile-nav-link {
  color: var(--text-color);
  padding: 0.8rem 0;
  font-weight: 500;
  border-bottom: 1px solid var(--border-color);
}

.mobile-auth-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.btn-primary-mobile, .btn-outline-mobile {
  text-align: center;
  padding: 10px;
}

.btn-primary-mobile {
  background-color: var(--primary-color);
  color: white;
  border-radius: var(--border-radius);
}

.btn-outline-mobile {
  background-color: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  border-radius: var(--border-radius);
}

/* 英雄区域 */
.hero {
  padding: 180px 0 120px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 50%, rgba(74, 108, 247, 0.9) 100%);
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

.hero-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
  animation: particleFloat 20s ease-in-out infinite;
}

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

.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 5rem;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 0 0 45%;
  max-width: 600px;
  color: white;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  animation: fadeInUp 0.8s ease;
}

.hero-badge i {
  color: #ffd700;
  animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.2) rotate(180deg); }
}

.hero-content h1 {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease 0.2s both;
}

.hero-title-main {
  font-size: 2.8rem;
  line-height: 1.2;
  font-weight: 800;
  color: white;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
}

.hero-title-sub {
  font-size: 1.5rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.9);
  margin-top: 0.5rem;
}

.hero-description {
  font-size: 1.15rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease 0.4s both;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-bottom: 2.5rem;
  animation: fadeInUp 1s ease 0.6s both;
}

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: white;
  line-height: 1;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #ffd700, #ffed4e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: nowrap;
  align-items: center;
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease 0.8s both;
}

.hero-buttons .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-trust {
  animation: fadeInUp 1s ease 1s both;
}

.trust-text {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 1rem;
}

.trust-text strong {
  color: #ffd700;
  font-weight: 700;
}

.trust-badges {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.1);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  backdrop-filter: blur(10px);
}

.trust-badge i {
  color: #4ade80;
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  position: relative;
  animation: fadeInRight 1s ease 0.5s both;
  min-width: 0;
}

.hero-image-wrapper {
  position: relative;
  max-width: 800px;
  width: 100%;
  min-width: 500px;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
  transition: transform 0.5s ease;
  border: 3px solid rgba(255, 255, 255, 0.2);
}

.hero-image img:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.hero-image-glow {
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.3) 0%, transparent 70%);
  border-radius: 30px;
  z-index: -1;
  animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

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

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

/* 特点区域 */
.features {
  padding: 120px 0;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: white;
  border-radius: 20px;
  padding: 2.5rem;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

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

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 20px;
  color: white;
  font-size: 2rem;
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
  transition: all 0.3s ease;
  position: relative;
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 6px 20px rgba(74, 108, 247, 0.4);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
  font-weight: 700;
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.8;
}

/* 功能区域 */
.functions {
  padding: 120px 0;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  position: relative;
}

.function-tabs {
  margin-top: 3rem;
}

.tab-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
  background: white;
  padding: 1rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.tab-btn {
  padding: 14px 28px;
  border: none;
  background-color: transparent;
  color: var(--text-light);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 12px;
  position: relative;
}

.tab-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 12px;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.tab-btn:hover {
  color: var(--primary-color);
  transform: translateY(-2px);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
  transform: translateY(-2px);
}

.tab-btn.active::before {
  opacity: 1;
}

.tab-content {
  position: relative;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.5s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.tab-grid {
  display: flex;
  align-items: center;
  gap: 4rem;
  background: white;
  padding: 3rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.tab-grid:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.tab-image {
  flex: 1;
  position: relative;
}

.tab-image::before {
  content: '';
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  background: linear-gradient(135deg, rgba(74, 108, 247, 0.1), rgba(255, 95, 141, 0.1));
  border-radius: 24px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tab-grid:hover .tab-image::before {
  opacity: 1;
}

.tab-image img {
  border-radius: 16px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease;
  width: 100%;
  height: auto;
}

.tab-grid:hover .tab-image img {
  transform: scale(1.02);
}

.tab-info {
  flex: 1;
}

.tab-info h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-color);
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: 8px;
  transition: background 0.3s ease;
}

.feature-list li:hover {
  background: rgba(74, 108, 247, 0.05);
}

.feature-list i {
  color: var(--success-color);
  font-size: 0.9rem;
  width: 20px;
  flex-shrink: 0;
}

/* 开发日志区域 */
.dev-log {
  padding: 120px 0;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  position: relative;
}

.version-slider {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem 0;
  gap: 1.5rem;
}

.version-container {
  position: relative;
  flex: 1;
  min-height: 400px;
  overflow: hidden;
}

.version-loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 3rem;
  background-color: white;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  min-height: 200px;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.version-loading p {
  color: var(--text-color);
  font-size: 1.1rem;
  opacity: 0.6;
}

.version-item {
  display: none;
  flex-direction: column;
  background: white;
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
  min-height: 400px;
}

/* 顶部渐变条（与其他卡片保持一致） */
.version-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transition: transform 0.3s ease;
  transform-origin: left;
}

.version-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

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

.version-item.active {
  display: flex;
  animation: fadeInUp 0.5s ease;
}

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

.version-header {
  display: flex;
  flex-direction: column;
  margin-bottom: 1.5rem;
}

.version-date {
  background: linear-gradient(135deg, var(--primary-light), rgba(74, 108, 247, 0.1));
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  display: inline-block;
  font-weight: 600;
  color: var(--primary-color);
  align-self: flex-start;
  margin-bottom: 1rem;
  border: 1px solid rgba(74, 108, 247, 0.2);
}

.version-title {
  color: var(--text-color);
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
}

.version-content {
  flex: 1;
}

.version-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.slider-nav {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 2;
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
  flex-shrink: 0;
}

.slider-nav:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(74, 108, 247, 0.4);
}

.slider-nav:active {
  transform: scale(0.95);
}

.slider-nav:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.2);
}

.slider-nav:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.slider-nav i {
  font-size: 1.2rem;
}

.version-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--border-color);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.dot::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: transparent;
  transition: all 0.3s ease;
}

.dot:hover {
  background-color: rgba(74, 108, 247, 0.3);
  transform: scale(1.2);
}

.dot.active {
  background-color: var(--primary-color);
  transform: scale(1.3);
  box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.2);
}

.dot.active::after {
  background-color: var(--primary-color);
  width: 6px;
  height: 6px;
}

.update-list {
  margin: 1.5rem 0;
  list-style: none;
  padding: 0;
}

.update-list li {
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  padding: 0.75rem;
  border-radius: 8px;
  transition: background-color 0.2s ease;
}

.update-list li:hover {
  background-color: var(--primary-light);
}

.update-list i {
  color: var(--primary-color);
  margin-right: 0.75rem;
  min-width: 20px;
  margin-top: 3px;
  font-size: 0.9rem;
}

.update-list li:has(i.fa-star) i {
  color: #ffd700;
}

.update-list li:has(i.fa-wrench) i {
  color: var(--primary-color);
}

.update-list li:has(i.fa-ellipsis-h) i {
  color: var(--text-light);
}

.read-more {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  font-weight: 600;
  margin-top: 1rem;
  transition: all 0.3s ease;
  padding: 0.5rem 1rem;
  border-radius: 8px;
}

.read-more:hover {
  color: var(--primary-dark);
  background-color: var(--primary-light);
  transform: translateX(3px);
}

.read-more i {
  margin-left: 0.5rem;
  transition: transform 0.3s ease;
}

.read-more:hover i {
  transform: translateX(5px);
}

/* 演示视频区域 */
.demo {
  padding: 100px 0;
  background-color: var(--background-color);
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* 场景化展示区域 */
.scenarios {
  padding: 120px 0;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  position: relative;
}

.scenarios-timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0;
}

.scenarios-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
  transform: translateX(-50%);
  border-radius: 2px;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 4rem;
  position: relative;
  animation: fadeInUp 0.8s ease both;
}

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

.timeline-item:nth-child(even) .timeline-content {
  text-align: right;
}

.timeline-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
  position: relative;
  z-index: 2;
  flex-shrink: 0;
  margin: 0 1rem;
  animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3); }
  50% { transform: scale(1.1); box-shadow: 0 6px 20px rgba(74, 108, 247, 0.5); }
}

.timeline-content {
  flex: 1;
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.timeline-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.timeline-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.timeline-features {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.timeline-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-color);
  font-size: 0.95rem;
}

.timeline-features i {
  color: var(--success-color);
  font-size: 0.9rem;
}

/* 客户评价区域 */
.testimonials {
  padding: 120px 0;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.testimonial-card {
  background: white;
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.testimonial-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.testimonial-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

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

.testimonial-card.featured {
  border: 2px solid var(--primary-color);
  background: linear-gradient(135deg, rgba(74, 108, 247, 0.02) 0%, rgba(255, 95, 141, 0.02) 100%);
}

.testimonial-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.testimonial-rating {
  display: flex;
  gap: 0.3rem;
}

.testimonial-rating i {
  color: #ffd700;
  font-size: 0.9rem;
}

.testimonial-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--primary-light);
  color: var(--primary-color);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.testimonial-content {
  margin-bottom: 1.5rem;
}

.testimonial-content p {
  font-style: italic;
  line-height: 1.8;
  color: var(--text-color);
  position: relative;
  padding-left: 1.5rem;
}

.testimonial-content p::before {
  content: '"';
  position: absolute;
  left: 0;
  top: -10px;
  font-size: 3rem;
  color: var(--primary-color);
  opacity: 0.2;
  font-family: Georgia, serif;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.author-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.author-info h4 {
  margin-bottom: 0.3rem;
  font-size: 1rem;
  color: var(--text-color);
}

.author-info p {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.author-stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.author-stats span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--success-color);
  background: rgba(16, 185, 129, 0.1);
  padding: 0.3rem 0.6rem;
  border-radius: 12px;
  font-weight: 600;
}

.author-stats i {
  font-size: 0.75rem;
}

.testimonial-content p {
  font-style: italic;
  color: var(--text-color);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.testimonial-author img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
}

.author-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.author-avatar i {
  font-size: 1.8rem;
  color: var(--primary-color);
}

.author-info h4 {
  font-size: 1.1rem;
  margin-bottom: 0.2rem;
  color: var(--text-color);
}

.author-info p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

/* 行动召唤区域 */
.cta {
  padding: 120px 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.cta-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.95) 0%, rgba(118, 75, 162, 0.95) 50%, rgba(74, 108, 247, 0.95) 100%);
  animation: gradientShift 15s ease infinite;
}

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

.cta-content {
  max-width: 800px;
  margin: 0 auto;
}

.cta-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  animation: bounce 2s ease-in-out infinite;
  display: inline-block;
}

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

.cta-content h2 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: white;
  font-weight: 800;
}

.cta-description {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.cta-benefits {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.cta-benefit {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
}

.cta-benefit i {
  color: #4ade80;
  font-size: 1.1rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.btn-cta-primary {
  background: white;
  color: var(--primary-color);
  font-weight: 700;
  padding: 16px 32px;
  font-size: 1.1rem;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.btn-cta-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.3);
  background: #f8f9fa;
}

.btn-cta-secondary {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: white;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.btn-cta-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-3px);
}

.cta-note {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.cta-note i {
  color: #4ade80;
}

.cta .btn-primary {
  background-color: white;
  color: var(--primary-color);
}

.cta .btn-primary:hover {
  background-color: rgba(255, 255, 255, 0.9);
}

/* 关于我们区域 */
.about {
  padding: 120px 0;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  position: relative;
}

.about-content {
  display: flex;
  justify-content: center;
  align-items: center;
  background: white;
  padding: 3rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.about-content:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.about-text {
  width: 100%;
  text-align: left;
}

.about-text p {
  line-height: 1.8;
  color: var(--text-color);
  margin-bottom: 1.5rem;
}

.about-text strong {
  color: var(--primary-color);
  font-weight: 700;
}

.about-image {
  flex: 1;
}

.about-image img {
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
}

.about-placeholder {
  width: 100%;
  height: 300px;
  background-color: var(--primary-light);
  border-radius: var(--border-radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.about-placeholder i {
  font-size: 4rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.about-placeholder p {
  font-size: 1.2rem;
  color: var(--text-color);
  font-weight: 500;
  margin: 0;
}

/* 联系我们区域 */
.contact {
  padding: 120px 0;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  position: relative;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  background: white;
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  height: fit-content;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem;
  border-radius: 12px;
  transition: all 0.3s ease;
}

.contact-item:hover {
  background: rgba(74, 108, 247, 0.05);
  transform: translateX(5px);
}

.contact-item i {
  font-size: 1.5rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
  flex-shrink: 0;
}

.contact-item p {
  margin-bottom: 0;
  color: var(--text-color);
  font-weight: 500;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
  text-decoration: none;
  font-size: 1.2rem;
}

.social-link i {
  display: inline-block;
  font-size: 1.2rem;
  line-height: 1;
  color: white;
}

.social-link:hover {
  transform: translateY(-3px) scale(1.1);
  box-shadow: 0 6px 20px rgba(74, 108, 247, 0.4);
}

.social-link:hover i {
  color: white;
}

.contact-form {
  background: white;
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.contact-form:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-color);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  font-family: var(--font-family);
  font-size: 1rem;
  transition: all 0.3s ease;
  background: #f8fafc;
}

.form-group input:hover,
.form-group textarea:hover {
  border-color: var(--primary-color);
  background: white;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background: white;
  box-shadow: 0 0 0 4px rgba(74, 108, 247, 0.1);
  transform: translateY(-2px);
}

/* 页脚 */
.footer {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #4a6cf7 100%);
  color: white;
  padding: 80px 0 0;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.footer::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
}

.footer-logo:hover {
  transform: scale(1.05);
}

.footer-logo img {
  height: 40px;
  width: 40px;
  margin-right: 12px;
  transition: all 0.3s ease;
  display: block;
  opacity: 1;
  object-fit: contain;
  background: transparent;
}

.footer-logo:hover img {
  opacity: 1;
  transform: scale(1.05);
}

.footer-logo h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0;
  background: linear-gradient(135deg, #ffffff, rgba(255, 255, 255, 0.8));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-column p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.footer-column h4 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: white;
  font-weight: 700;
  position: relative;
  display: inline-block;
  padding-bottom: 0.5rem;
}

.footer-column h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: all 0.3s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: #ffd700;
  transform: translateX(5px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 30px 0;
  text-align: center;
  position: relative;
}

.footer-bottom::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.footer-bottom p:last-child {
  margin-bottom: 0;
}

.icp-license {
  margin-top: 0.5rem;
}

.icp-license a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 0.85rem;
}

.icp-license a:hover {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: underline;
}

/* 页脚中的社交链接 */
.footer .social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.footer .social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
  text-decoration: none;
  font-size: 1.2rem;
}

.footer .social-link i {
  display: inline-block;
  font-size: 1.2rem;
  line-height: 1;
  color: white;
}

.footer .social-link:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px) scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
}

.footer .social-link:hover i {
  color: white;
}

/* 回到顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  cursor: pointer;
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  box-shadow: 0 4px 20px rgba(74, 108, 247, 0.4);
  z-index: 99;
}

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

.back-to-top:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 8px 30px rgba(74, 108, 247, 0.6);
}

/* 响应式设计 */
@media (max-width: 1400px) {
  .container {
    max-width: 1400px;
  }
  
  .hero-image-wrapper {
    max-width: 700px;
    min-width: 400px;
  }
}

@media (max-width: 1024px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
    gap: 3rem;
  }

  .hero-content {
    max-width: 100%;
    flex: 1;
  }
  
  .hero-image-wrapper {
    max-width: 100%;
    min-width: auto;
  }

  .hero-title-main {
    font-size: 2.2rem;
    white-space: normal;
  }

  .hero-title-sub {
    font-size: 1.2rem;
  }

  .hero-stats {
    justify-content: center;
  }

  .scenarios-timeline::before {
    left: 30px;
  }

  .timeline-item {
    flex-direction: row !important;
    padding-left: 80px;
  }

  .timeline-item .timeline-content {
    text-align: left !important;
  }

  .timeline-icon {
    position: absolute;
    left: 0;
    margin: 0;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .section-header h2 {
    font-size: 2.2rem;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-content h1 {
    font-size: 2.5rem;
    line-height: 1.3;
  }

  .hero-content p {
    max-width: 100%;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tab-grid {
    flex-direction: column;
    gap: 2rem;
  }

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

  .about-content {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links, .auth-buttons, .language-switcher {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .hero .container {
    flex-direction: column;
    text-align: center;
  }

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

  .hero-content {
    margin-bottom: 2rem;
  }

  .hero-title-main {
    font-size: 1.8rem;
    white-space: normal;
  }

  .hero-title-sub {
    font-size: 1rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .hero-stats {
    flex-direction: row;
    gap: 0.8rem;
    justify-content: center;
    flex-wrap: nowrap;
  }

  .stat-item {
    flex: 1;
    min-width: 0;
  }

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

  .stat-label {
    font-size: 0.75rem;
  }

  .hero-buttons {
    justify-content: center;
    flex-direction: column;
    width: 100%;
  }

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

  .scenarios {
    padding: 80px 0;
  }

  .scenarios-timeline::before {
    left: 20px;
  }

  .timeline-item {
    flex-direction: row !important;
    padding-left: 60px;
    margin-bottom: 2.5rem;
  }

  .timeline-item .timeline-content {
    text-align: left !important;
  }

  .timeline-icon {
    position: absolute;
    left: 0;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    margin: 0;
  }

  .timeline-content {
    padding: 1.5rem;
  }

  .timeline-content h3 {
    font-size: 1.2rem;
  }

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

  .cta-content h2 {
    font-size: 2rem;
  }

  .cta-description {
    font-size: 1rem;
  }

  .cta-benefits {
    flex-direction: column;
    gap: 1rem;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-buttons .btn {
    width: 100%;
  }

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

  .version-slider {
    flex-direction: row;
    padding: 1rem;
    gap: 0.5rem;
    position: relative;
  }

  .version-container {
    width: 100%;
    min-height: 350px;
  }

  .slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 40px;
    height: 40px;
  }

  .slider-nav.prev-btn {
    left: 5px;
    margin-right: 0;
  }

  .slider-nav.next-btn {
    right: 5px;
    margin-left: 0;
  }

  .version-item {
    padding: 1.5rem;
    min-height: 350px;
  }

  .version-title {
    font-size: 1.2rem;
  }

  .version-date {
    font-size: 0.8rem;
    padding: 6px 12px;
  }

  .version-dots {
    margin-top: 1.5rem;
  }

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

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

@media (max-width: 480px) {
  .section-header h2 {
    font-size: 1.8rem;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-content h1 {
    font-size: 2rem;
    line-height: 1.3;
  }

  .hero-content p {
    max-width: 100%;
  }

  .hero-stats {
    flex-direction: row;
    gap: 0.5rem;
    justify-content: space-between;
    flex-wrap: nowrap;
  }

  .stat-item {
    flex: 1;
    min-width: 0;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .stat-label {
    font-size: 0.7rem;
  }

  .hero-image img {
    transform: none;
    max-width: 100%;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 1rem;
  }

  .tab-buttons {
    flex-direction: column;
  }

  .version-slider {
    padding: 0.5rem;
    gap: 0.25rem;
  }

  .version-container {
    min-height: 300px;
  }

  .version-item {
    padding: 1.2rem;
    min-height: 300px;
  }

  .version-title {
    font-size: 1.1rem;
  }

  .version-date {
    font-size: 0.75rem;
    padding: 6px 10px;
  }

  .slider-nav {
    width: 36px;
    height: 36px;
    font-size: 0.9rem;
  }

  .slider-nav i {
    font-size: 1rem;
  }

  .update-list li {
    margin-bottom: 0.75rem;
    padding: 0.5rem;
  }

  .update-list i {
    font-size: 0.85rem;
    margin-right: 0.5rem;
  }

  .version-dots {
    gap: 0.5rem;
  }

  .dot {
    width: 8px;
    height: 8px;
  }

  .testimonial-card {
    min-width: 280px;
  }
}

/* 页面加载动画 */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.page-loader.active {
  display: flex;
  opacity: 1;
}

.loader-content {
  text-align: center;
  color: white;
}

.loader-logo {
  margin-bottom: 2rem;
  animation: logoFloat 2s ease-in-out infinite;
}

.loader-logo img {
  width: 120px;
  height: 120px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

.loader-spinner {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto 2rem;
}

.spinner-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 4px solid transparent;
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1.5s linear infinite;
}

.spinner-ring:nth-child(1) {
  animation-delay: 0s;
  opacity: 1;
}

.spinner-ring:nth-child(2) {
  animation-delay: 0.5s;
  opacity: 0.7;
  width: 70%;
  height: 70%;
  top: 15%;
  left: 15%;
}

.spinner-ring:nth-child(3) {
  animation-delay: 1s;
  opacity: 0.5;
  width: 50%;
  height: 50%;
  top: 25%;
  left: 25%;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.loader-text {
  font-size: 2rem;
  font-weight: 700;
  color: white;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  letter-spacing: 2px;
}

.loader-subtext {
  font-size: 1rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 0;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}