/* 基础设置 */
:root {
  /* 主要颜色 - 魔幻风格 */
  --primary-color: #6a11cb;
  --primary-gradient: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  --secondary-color: #2575fc;
  --accent-color: #fd5e53;
  --success-color: #00d1b2;
  --warning-color: #ffdd57;
  --danger-color: #ff3860;
  
  /* 中性色 */
  --text-dark: #2c3e50;
  --text-light: #f8f9fa;
  --text-muted: #6c757d;
  --background-light: #ffffff;
  --background-dark: #1a1a2e;
  --border-color: #e9ecef;
  
  /* 字体 */
  --font-primary: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  
  /* 尺寸 */
  --header-height: 80px;
  --container-max-width: 1200px;
  --border-radius-sm: 4px;
  --border-radius: 8px;
  --border-radius-lg: 16px;
  
  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  
  /* 阴影 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-magic: 0 10px 20px rgba(106, 17, 203, 0.15);
  
  /* 动画 */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;
  --transition-slow: all 0.5s ease;
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--text-dark);
  background-color: var(--background-light);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

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

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

/* 容器 */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* 浮动元素清除 */
.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
  padding-bottom: var(--spacing-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--primary-gradient);
  border-radius: var(--border-radius);
}

.section-subtitle {
  text-align: center;
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-top: -20px;
  margin-bottom: var(--spacing-xl);
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-magic);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 25px rgba(106, 17, 203, 0.25);
  color: white;
}

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

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

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

.btn-outline:hover {
  background-color: var(--border-color);
  color: var(--text-dark);
}

.pulse-btn {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(106, 17, 203, 0.7);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(106, 17, 203, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(106, 17, 203, 0);
  }
}

/* 导航栏 */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: var(--transition);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

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

.logo img {
  height: 40px;
  margin-right: var(--spacing-sm);
}

.logo h1 {
  font-size: 1.5rem;
  margin-bottom: 0;
  color: var(--primary-color);
  font-weight: 700;
}

nav ul {
  display: flex;
  align-items: center;
}

nav ul li {
  margin-left: var(--spacing-xl);
}

nav ul li a {
  color: var(--text-dark);
  font-weight: 600;
  position: relative;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: var(--transition);
}

nav ul li a:hover::after,
nav ul li a.active::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
}

.language-selector select {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  background-color: white;
  font-size: 0.9rem;
  cursor: pointer;
}

/* 英雄区 */
.hero {
  padding: calc(var(--header-height) + var(--spacing-xxl)) 0 var(--spacing-xxl);
  background: linear-gradient(135deg, #f5f7fa 0%, #e0e6ed 100%);
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 10;
}

.hero-content {
  flex: 1;
  padding-right: var(--spacing-xl);
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  color: var(--text-muted);
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}

.phone-mockup {
  position: relative;
  width: 300px;
  height: 600px;
  background: white;
  border-radius: 40px;
  box-shadow: var(--shadow-lg);
  padding: 10px;
  border: 8px solid #333;
  overflow: hidden;
}

.phone-mockup::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 24px;
  background: #333;
  border-radius: 0 0 16px 16px;
  z-index: 10;
}

.phone-mockup img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 30px;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
}

.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.floating-emoji {
  position: absolute;
  font-size: 2rem;
  opacity: 0.7;
  animation: float 8s ease-in-out infinite;
}

.smile-1 {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.smile-2 {
  top: 60%;
  left: 20%;
  animation-delay: 1s;
}

.smile-3 {
  top: 30%;
  right: 15%;
  animation-delay: 2s;
}

.smile-4 {
  bottom: 20%;
  right: 10%;
  animation-delay: 3s;
}

.smile-5 {
  bottom: 40%;
  left: 30%;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(10px, 15px);
  }
  50% {
    transform: translate(5px, -10px);
  }
  75% {
    transform: translate(-10px, 5px);
  }
}

/* 社会认同 */
.social-proof {
  background-color: white;
  padding: var(--spacing-xl) 0;
  box-shadow: var(--shadow);
}

.social-proof .container {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  text-align: center;
}

.users-count, .rating, .featured {
  padding: var(--spacing-md);
}

.users-count i, .rating i {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.counter, .rating-value {
  font-size: 2rem;
  font-weight: 700;
  display: block;
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
}

.stars {
  color: #ffc107;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.featured span {
  display: block;
  margin-bottom: var(--spacing-sm);
}

.featured-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
}

.featured-logos img {
  height: 30px;
  opacity: 0.7;
  transition: var(--transition);
}

.featured-logos img:hover {
  opacity: 1;
}

/* 功能特点 */
.features {
  padding: var(--spacing-xxl) 0;
  background-color: #f9f9f9;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background-color: white;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.feature-card p {
  color: var(--text-muted);
}

/* 痛点部分 */
.pain-points {
  padding: var(--spacing-xxl) 0;
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  color: white;
}

.pain-points .section-title {
  color: white;
}

.pain-points .section-title::after {
  background: white;
}

.pain-points-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xxl);
}

.pain-point {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  transition: var(--transition);
  text-align: center;
}

.pain-point:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-5px);
}

.pain-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.pain-point h3 {
  color: white;
  font-size: 1.5rem;
}

.pain-point p {
  color: rgba(255, 255, 255, 0.8);
}

.solution {
  text-align: center;
  background-color: white;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  max-width: 700px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.solution h3 {
  color: var(--text-dark);
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

.solution p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
}

/* 截图展示 */
.screenshots {
  padding: var(--spacing-xxl) 0;
  background-color: #f9f9f9;
}

.screenshot-tabs {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
}

.tab-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: none;
  border: none;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 3px solid transparent;
}

.tab-btn.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.screenshots-slider {
  display: flex;
  overflow-x: auto;
  gap: var(--spacing-lg);
  padding: var(--spacing-md) 0;
  -ms-overflow-style: none;
  scrollbar-width: none;
  scroll-snap-type: x mandatory;
}

.screenshots-slider::-webkit-scrollbar {
  display: none;
}

.screenshot-card {
  flex: 0 0 auto;
  width: 250px;
  scroll-snap-align: center;
  text-align: center;
}

.phone-frame {
  width: 250px;
  height: 500px;
  background: white;
  border-radius: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  border: 8px solid #333;
  position: relative;
}

.phone-frame::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 15px;
  background: #333;
  border-radius: 0 0 10px 10px;
  z-index: 2;
}

.phone-frame iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.screenshot-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xs);
}

.screenshot-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.slider-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: var(--spacing-lg);
  gap: var(--spacing-md);
}

.prev-btn, .next-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: white;
  border: 1px solid var(--border-color);
  color: var(--text-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.prev-btn:hover, .next-btn:hover {
  background: var(--primary-color);
  color: white;
}

.slider-dots {
  display: flex;
  gap: var(--spacing-sm);
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.slider-dot.active {
  background-color: var(--primary-color);
  transform: scale(1.2);
}

.demo-link {
  text-align: center;
  margin-top: var(--spacing-xl);
}

/* 用户评价 */
.testimonials {
  padding: var(--spacing-xxl) 0;
  background-color: white;
}

.testimonials-slider {
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
}

.testimonial-card {
  padding: var(--spacing-xl);
  background-color: #f9f9f9;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.testimonial-avatar {
  flex-shrink: 0;
}

.testimonial-avatar img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid white;
  box-shadow: var(--shadow);
}

.testimonial-rating {
  color: #ffc107;
  margin-bottom: var(--spacing-md);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: var(--spacing-md);
}

.testimonial-author {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 700;
  color: var(--text-dark);
}

.author-title {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.testimonial-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: var(--spacing-lg);
  gap: var(--spacing-md);
}

.prev-testimonial, .next-testimonial {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: white;
  border: 1px solid var(--border-color);
  color: var(--text-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.prev-testimonial:hover, .next-testimonial:hover {
  background: var(--primary-color);
  color: white;
}

.testimonial-dots {
  display: flex;
  gap: var(--spacing-sm);
}

.testimonial-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.testimonial-dot.active {
  background-color: var(--primary-color);
  transform: scale(1.2);
}

/* 如何使用 */
.how-it-works {
  padding: var(--spacing-xxl) 0;
  background-color: #f9f9f9;
}

.steps {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  flex: 1;
  min-width: 200px;
  text-align: center;
  padding: var(--spacing-md);
  position: relative;
}

.step-number {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 30px;
  background: var(--primary-gradient);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  box-shadow: var(--shadow);
}

.step-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--primary-color);
  box-shadow: var(--shadow);
}

.step h3 {
  margin-bottom: var(--spacing-sm);
}

.step p {
  color: var(--text-muted);
}

.step-arrow {
  color: var(--primary-color);
  font-size: 1.5rem;
  padding: 0 var(--spacing-sm);
}

/* 价格 */
.pricing {
  padding: var(--spacing-xxl) 0;
  background-color: white;
}

.pricing-cards {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.pricing-card {
  flex: 1;
  min-width: 280px;
  max-width: 350px;
  background-color: #f9f9f9;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
  transform: scale(1.05);
  border: 2px solid var(--primary-color);
  z-index: 10;
}

.pricing-card.popular:hover {
  transform: scale(1.05) translateY(-10px);
}

.popular-tag {
  position: absolute;
  top: 15px;
  right: -35px;
  background: var(--primary-gradient);
  color: white;
  padding: 5px 40px;
  font-size: 0.8rem;
  font-weight: 700;
  transform: rotate(45deg);
}

.pricing-header {
  background: white;
  padding: var(--spacing-xl);
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.pricing-header h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
}

.currency {
  font-size: 1.2rem;
  font-weight: 700;
  margin-right: 2px;
}

.amount {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.period {
  color: var(--text-muted);
  margin-left: 4px;
}

.pricing-save {
  display: inline-block;
  background-color: rgba(106, 17, 203, 0.1);
  color: var(--primary-color);
  padding: 2px 8px;
  border-radius: var(--border-radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
}

.pricing-features {
  padding: var(--spacing-xl);
}

.pricing-features ul li {
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
}

.pricing-features ul li i {
  color: var(--success-color);
  margin-right: var(--spacing-sm);
  font-size: 1.1rem;
}

.pricing-cta {
  padding: 0 var(--spacing-xl) var(--spacing-xl);
  text-align: center;
}

.pricing-guarantee {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  background-color: #f9f9f9;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

.pricing-guarantee i {
  font-size: 2rem;
  color: var(--success-color);
}

.pricing-guarantee p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* 下载部分 */
.download {
  padding: var(--spacing-xxl) 0;
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  color: white;
}

.download .section-title,
.download .section-subtitle {
  color: white;
}

.download .section-title::after {
  background: white;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.download-btn {
  display: flex;
  align-items: center;
  background-color: white;
  color: var(--text-dark);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.download-btn:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  color: var(--text-dark);
}

.download-btn i {
  font-size: 2rem;
  margin-right: var(--spacing-md);
}

.download-btn span {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.download-btn small {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.download-btn strong {
  font-size: 1.2rem;
}

.countdown-timer {
  background-color: rgba(255, 255, 255, 0.1);
  max-width: 500px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.countdown-timer p {
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

.timer {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
}

.timer-item {
  background-color: white;
  color: var(--primary-color);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  min-width: 60px;
  text-align: center;
}

.timer-item span:first-child {
  font-size: 1.5rem;
  font-weight: 700;
  display: block;
}

.timer-divider {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  display: flex;
  align-items: center;
}

/* FAQ */
.faq {
  padding: var(--spacing-xxl) 0;
  background-color: #f9f9f9;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: white;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.faq-question {
  padding: var(--spacing-lg);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question h3 {
  font-size: 1.2rem;
  margin-bottom: 0;
}

.faq-toggle {
  color: var(--primary-color);
  font-size: 1.2rem;
  transition: var(--transition);
}

.faq-answer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  display: none;
  border-top: 1px solid var(--border-color);
}

.faq-answer p {
  margin: var(--spacing-md) 0 0;
  color: var(--text-muted);
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-item.active .faq-answer {
  display: block;
}

/* 页脚 */
footer {
  background-color: var(--background-dark);
  color: var(--text-light);
  padding: var(--spacing-xxl) 0 var(--spacing-xl);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-logo img {
  height: 40px;
  margin-right: var(--spacing-sm);
}

.footer-logo h2 {
  color: white;
  font-size: 1.5rem;
  margin-bottom: 0;
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-icon:hover {
  background-color: var(--primary-color);
  transform: translateY(-3px);
  color: white;
}

.footer-middle {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.footer-column {
  flex: 1;
  min-width: 180px;
  margin-bottom: var(--spacing-lg);
}

.footer-column h3 {
  color: white;
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.footer-column h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--primary-gradient);
}

.footer-column ul li {
  margin-bottom: var(--spacing-md);
}

.footer-column ul li a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-column ul li a:hover {
  color: white;
  padding-left: var(--spacing-sm);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

.footer-language select {
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: white;
  box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
  padding: var(--spacing-md) 0;
  z-index: 1000;
  display: none;
}

.cookie-banner .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.cookie-banner p {
  margin: 0;
  flex: 1;
  min-width: 280px;
}

.cookie-buttons {
  display: flex;
  gap: var(--spacing-md);
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-gradient);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 100;
  box-shadow: var(--shadow);
}

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

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* 响应式设计 */
@media (max-width: 1100px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .hero-content p {
    font-size: 1.1rem;
  }
  
  .phone-mockup {
    width: 250px;
    height: 500px;
  }
}

@media (max-width: 900px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-content {
    padding-right: 0;
    margin-bottom: var(--spacing-xl);
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .step-arrow {
    display: none;
  }
  
  .steps {
    flex-direction: column;
    gap: var(--spacing-xl);
  }
  
  .step {
    width: 100%;
  }
  
  .testimonial-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .testimonial-avatar {
    margin-bottom: var(--spacing-md);
  }
  
  .testimonial-author {
    align-items: center;
  }
}

@media (max-width: 768px) {
  nav ul {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .features-grid,
  .pain-points-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card {
    width: 100%;
  }
  
  .pricing-card.popular {
    transform: none;
  }
  
  .pricing-card.popular:hover {
    transform: translateY(-10px);
  }
  
  .footer-top,
  .footer-middle,
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .footer-top {
    gap: var(--spacing-lg);
  }
  
  .footer-column h3::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .footer-column ul li a:hover {
    padding-left: 0;
  }
  
  .footer-bottom {
    gap: var(--spacing-lg);
  }
  
  .copyright {
    margin-bottom: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .download-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .timer {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .cookie-banner .container {
    flex-direction: column;
    text-align: center;
  }
  
  .cookie-buttons {
    width: 100%;
    justify-content: center;
  }
  
  .back-to-top {
    right: 15px;
    bottom: 15px;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}