/* ========================================
   AI会员充值官网 - 现代化样式
   ======================================== */

/* CSS 变量 */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-glass: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --border-color: rgba(255, 255, 255, 0.1);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 60px rgba(99, 102, 241, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-primary) var(--bg-secondary);
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 4px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 背景粒子 */
.bg-particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(217, 70, 239, 0.05) 0%, transparent 70%);
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.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;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--accent-primary);
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

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

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

/* 限时福利按钮 */
.nav-welfare {
  background: transparent !important;
  color: #ffd93d !important;
  padding: 8px 16px !important;
  border-radius: 100px !important;
  font-weight: 600 !important;
  font-size: 0.85rem !important;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1.5px solid rgba(255, 217, 61, 0.6) !important;
  animation: welfareGlow 2s ease-in-out infinite, welfareFloat 3s ease-in-out infinite;
  transition: all 0.3s ease;
}

.nav-welfare:hover {
  background: rgba(255, 217, 61, 0.1) !important;
  border-color: #ffd93d !important;
  color: #ffd93d !important;
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(255, 217, 61, 0.3);
  animation-play-state: paused;
}

.nav-welfare::after {
  display: none !important;
}

.nav-welfare svg {
  animation: starSpin 2s linear infinite;
}

@keyframes welfareGlow {
  0%, 100% {
    box-shadow: 0 0 5px rgba(255, 217, 61, 0.2);
  }
  50% {
    box-shadow: 0 0 15px rgba(255, 217, 61, 0.4);
  }
}

@keyframes welfareFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-3px);
  }
}

@keyframes starSpin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
  min-height: auto;
  padding: 100px 24px 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100vw;
  height: 100vw;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.hero-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 80px;
  max-width: 1200px;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1;
  max-width: 600px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  backdrop-filter: blur(10px);
  animation: fadeInUp 0.4s ease-out;
}

.hero-badge svg {
  color: #fbbf24;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  white-space: nowrap;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-title .gradient-text {
  display: block;
}

.hero-title .subtitle {
  display: inline;
}

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

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-stats {
  display: flex;
  gap: 40px;
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.hero-visual {
  flex: 1;
  max-width: 500px;
  display: none;
}

@media (min-width: 1024px) {
  .hero-visual {
    display: block;
  }
}

.floating-cards {
  position: relative;
  width: 100%;
  height: 400px;
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  animation: float 6s ease-in-out infinite;
}

.float-card .card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.float-card .card-icon svg {
  width: 24px;
  height: 24px;
  color: #fff;
}

.float-card span {
  font-weight: 600;
  font-size: 0.95rem;
}

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

.card-2 {
  top: 25%;
  right: 5%;
  animation-delay: 1s;
}

.card-3 {
  bottom: 35%;
  left: 0;
  animation-delay: 2s;
}

.card-4 {
  bottom: 15%;
  right: 15%;
  animation-delay: 3s;
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-primary);
}

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

.btn-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
}

/* ========================================
   通用 Section
   ======================================== */
.section {
  padding: 60px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-header {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.view-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding: 8px 20px;
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  color: white;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 100px;
  box-shadow: 0 4px 20px rgba(249, 115, 22, 0.4);
  transition: all 0.3s ease;
}

.view-more-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(249, 115, 22, 0.5);
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 100px;
  font-size: 0.875rem;
  color: var(--accent-primary);
  font-weight: 500;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* ========================================
   产品轮播
   ======================================== */
.products-carousel {
  position: relative;
  margin: 0 -40px;
  padding: 0 60px;
}

.carousel-viewport {
  overflow: hidden;
  position: relative;
}

.products-track {
  display: flex;
  gap: 24px;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 10px 0;
}

.products-track .product-card {
  flex: 0 0 calc(25% - 18px);
  min-width: 260px;
}

/* 轮播箭头 */
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 10;
}

.carousel-arrow:not(:disabled) {
  animation: arrowFloat 2s ease-in-out infinite, arrowGlow 2s ease-in-out infinite;
}

.carousel-arrow:not(:disabled):hover {
  background: rgba(99, 102, 241, 0.3);
  border-color: var(--accent-primary);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 0 25px rgba(99, 102, 241, 0.5);
}

@keyframes arrowFloat {
  0%, 100% {
    transform: translateY(-50%) translateX(0);
  }
  50% {
    transform: translateY(calc(-50% - 6px)) translateX(0);
  }
}

@keyframes arrowGlow {
  0%, 100% {
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
  }
  50% {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
  }
}

.carousel-arrow.left:not(:disabled) {
  animation-name: arrowFloatLeft, arrowGlowLeft;
}

.carousel-arrow.right:not(:disabled) {
  animation-name: arrowFloatRight, arrowGlowRight;
}

@keyframes arrowGlowLeft {
  0%, 100% {
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
  }
  50% {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.5), -4px 0 15px rgba(99, 102, 241, 0.3);
  }
}

@keyframes arrowGlowRight {
  0%, 100% {
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
  }
  50% {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.5), 4px 0 15px rgba(99, 102, 241, 0.3);
  }
}

@keyframes arrowFloatLeft {
  0%, 100% {
    transform: translateY(-50%) translateX(0);
  }
  50% {
    transform: translateY(calc(-50% - 6px)) translateX(4px);
  }
}

@keyframes arrowFloatRight {
  0%, 100% {
    transform: translateY(-50%) translateX(0);
  }
  50% {
    transform: translateY(calc(-50% - 6px)) translateX(-4px);
  }
}

.carousel-arrow.left {
  left: 0;
}

.carousel-arrow.right {
  right: 0;
}

.carousel-arrow:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  animation: none;
}

.carousel-arrow:disabled:hover {
  background: var(--bg-glass);
  border-color: var(--border-color);
  transform: translateY(-50%) scale(1);
}

/* 轮播指示器 */
.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 30px;
}

.carousel-indicators .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  cursor: pointer;
}

.carousel-indicators .dot.active {
  background: var(--accent-primary);
  width: 24px;
  border-radius: 4px;
}

@media (max-width: 1024px) {
  .products-track .product-card {
    flex: 0 0 calc(50% - 12px);
    min-width: 220px;
  }
}

@media (max-width: 768px) {
  .products-carousel {
    margin: 0 -20px;
    padding: 0 50px;
  }
  
  .products-track .product-card {
    flex: 0 0 calc(80% - 10px);
    min-width: 240px;
  }
  
  .carousel-arrow {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 480px) {
  .products-track .product-card {
    flex: 0 0 calc(85%);
    min-width: 260px;
  }
}

/* ========================================
   产品卡片
   ======================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
}

.product-card {
  position: relative;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: var(--transition);
}

.product-card[data-product="chatgpt"] {
  border-color: rgba(99, 102, 241, 0.6);
  box-shadow: 0 0 40px rgba(99, 102, 241, 0.25), 0 0 80px rgba(99, 102, 241, 0.1);
}

.product-card[data-product="chatgpt"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    transparent 30%,
    rgba(99, 102, 241, 0.2) 50%,
    rgba(139, 92, 246, 0.25) 55%,
    transparent 70%
  );
  animation: shimmer 2.5s infinite;
  pointer-events: none;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%) translateY(-100%);
  }
  100% {
    transform: translateX(100%) translateY(100%);
  }
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.product-card:hover::before {
  opacity: 1;
}

.product-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 6px 12px;
  background: rgba(99, 102, 241, 0.2);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.product-badge.hot {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.3);
  color: #ef4444;
}

.product-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  overflow: hidden;
  background: transparent !important;
  padding: 8px;
}

.product-icon .brand-icon,
.product-icon .product-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 8px;
  line-height: 1.6;
}

.product-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 16px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border-color);
}

.product-price .price-value {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, #f97316 0%, #ef4444 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.product-price .price-unit {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.product-features span {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.product-btn {
  display: block;
  width: 100%;
  padding: 12px 24px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-align: center;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.product-btn:hover {
  background: var(--accent-gradient);
  border-color: transparent;
}

/* ========================================
   购买方式
   ======================================== */
.purchase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) {
  .purchase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .purchase-grid {
    grid-template-columns: 1fr;
  }
}

.purchase-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.purchase-card.primary {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 0 40px rgba(99, 102, 241, 0.2), 0 0 80px rgba(99, 102, 241, 0.08);
  position: relative;
  overflow: hidden;
}

.purchase-card.primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    transparent 30%,
    rgba(99, 102, 241, 0.15) 50%,
    rgba(139, 92, 246, 0.2) 55%,
    transparent 70%
  );
  animation: shimmer 2.5s infinite;
  pointer-events: none;
}

.purchase-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition);
}

.purchase-card.primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  opacity: 1;
}

/* 购买渠道标签 */
.purchase-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 6px 14px;
  background: var(--accent-gradient);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  z-index: 1;
}

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

.purchase-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.purchase-icon svg {
  width: 28px;
  height: 28px;
  color: var(--accent-primary);
}

.purchase-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.purchase-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.purchase-desc .desc-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.9rem;
  transition: var(--transition);
}

.purchase-desc .desc-item:last-child {
  border-bottom: none;
}

.purchase-desc .desc-item:hover {
  padding-left: 8px;
}

.purchase-desc .desc-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--accent-gradient);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  flex-shrink: 0;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.contact-item:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
}

.contact-icon {
  font-size: 1.2rem;
}

.purchase-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 24px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  color: white;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.purchase-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.purchase-btn.secondary {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
}

.purchase-btn.secondary:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
}

/* ========================================
   质保说明
   ======================================== */
.warranty-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.warranty-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: var(--transition);
}

.warranty-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.3);
}

.warranty-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.warranty-icon svg {
  width: 28px;
  height: 28px;
  color: var(--accent-primary);
}

.warranty-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.warranty-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.refund-example {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 24px;
  background: rgba(99, 102, 241, 0.05);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-lg);
}

.refund-icon {
  font-size: 2rem;
  line-height: 1;
}

.refund-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.refund-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.refund-formula {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px;
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  font-family: 'Monaco', 'Consolas', monospace;
}

.refund-formula .formula {
  color: var(--accent-primary);
}

/* ========================================
   交付方式
   ======================================== */
.delivery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 24px;
}

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

.delivery-card {
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: var(--transition);
}

.delivery-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.3);
}

.delivery-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.delivery-icon svg {
  width: 32px;
  height: 32px;
  color: var(--accent-primary);
}

.delivery-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.delivery-card > p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.delivery-features {
  list-style: none;
}

.delivery-features li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.delivery-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: 600;
}

/* ========================================
   价格说明
   ======================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.pricing-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: var(--transition);
  text-align: center;
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.3);
}

.pricing-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.pricing-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.pricing-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ========================================
   关于我们
   ======================================== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

@media (max-width: 900px) {
  .about-content {
    grid-template-columns: 1fr;
  }
}

.about-text .section-tag,
.about-text .section-title {
  text-align: left;
}

.advantages-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 32px 0;
}

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

.advantage-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
  font-size: 1.5rem;
}

.advantage-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.advantage-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.trust-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

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

.trust-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent-primary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.trust-link:hover {
  color: var(--accent-secondary);
}

.trust-sep {
  color: var(--border-color);
}

.trust-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
}

.trust-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.trust-stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
}

.trust-score {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.trust-quote {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.trust-quote:last-child {
  border-bottom: none;
}

/* ========================================
   CTA 区域
   ======================================== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

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

.cta-content h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ========================================
   页脚
   ======================================== */
.footer {
  padding: 60px 0 30px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 60px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

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

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

@media (max-width: 480px) {
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 12px;
  transition: var(--transition);
}

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ========================================
   Toast 提示
   ======================================== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 14px 28px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

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

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
  }

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

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    padding: 100px 0 60px;
    text-align: center;
  }

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

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

  .section {
    padding: 60px 0;
  }

  .refund-example {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 入场动画 */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}