/*
  File: website2-product/css/style.css
  Agent: @uidesigner
  Task: T2 - UI/UX 设计
  Created: 2026-03-23
*/

/* ==================== CSS 变量 ==================== */
:root {
  /* 配色方案 */
  --primary-dark: #0F172A;
  --primary: #1e293b;
  --secondary: #7C3AED;
  --secondary-light: #8b5cf6;
  --accent: #10B981;
  --accent-hover: #059669;
  
  /* 文字颜色 */
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  /* 背景色 */
  --bg-dark: #0F172A;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  
  /* 边框 */
  --border-color: #334155;
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #7C3AED 0%, #3b82f6 100%);
  --gradient-accent: linear-gradient(135deg, #10B981 0%, #3b82f6 100%);
  --gradient-text: linear-gradient(135deg, #7C3AED 0%, #3b82f6 50%, #10B981 100%);
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(124, 58, 237, 0.3);
  
  /* 间距 */
  --section-padding: 100px 0;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* 动画 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ==================== 通用样式 ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

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

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.5);
}

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

.btn-outline:hover {
  border-color: var(--secondary);
  color: var(--secondary);
}

.btn-large {
  padding: 16px 32px;
  font-size: 18px;
}

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
}

/* ==================== 导航栏 ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  padding: 15px 0;
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
}

.logo-icon {
  color: var(--secondary);
  font-size: 24px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  transition: color var(--transition-fast);
}

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

.nav-cta {
  padding: 10px 20px;
  font-size: 14px;
}

/* ==================== Hero 区域 ==================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
  z-index: -1;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(124, 58, 237, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 58, 237, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.5;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  padding: 40px;
  background: rgba(30, 41, 59, 0.5);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
}

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

.stat-number {
  display: block;
  font-size: 36px;
  font-weight: 700;
  color: var(--secondary-light);
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 14px;
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 20px;
  height: 30px;
  border: 2px solid var(--text-muted);
  border-radius: 10px;
  position: relative;
}

.scroll-arrow::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 2px;
  animation: scrollDown 2s infinite;
}

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

@keyframes scrollDown {
  0%, 100% { opacity: 1; top: 6px; }
  50% { opacity: 0.3; top: 12px; }
}

/* ==================== 痛点分析 ==================== */
.pain-points {
  padding: var(--section-padding);
  background: var(--bg-dark);
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition-normal);
}

.pain-card:hover {
  transform: translateY(-8px);
  border-color: var(--secondary);
  box-shadow: var(--shadow-glow);
}

.pain-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.pain-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

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

/* ==================== 解决方案 ==================== */
.solutions {
  padding: var(--section-padding);
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--primary) 100%);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.solution-card:hover {
  transform: translateY(-4px);
  border-color: var(--secondary);
}

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

.solution-number {
  font-size: 48px;
  font-weight: 800;
  color: rgba(124, 58, 237, 0.2);
  position: absolute;
  top: 20px;
  right: 24px;
}

.solution-card h3 {
  font-size: 22px;
  margin-bottom: 16px;
  padding-right: 60px;
}

.solution-card > p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

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

.solution-features li {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 8px;
}

/* ==================== 核心产品 ==================== */
.products {
  padding: var(--section-padding);
  background: var(--primary);
}

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

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.2);
}

.product-icon {
  font-size: 40px;
  margin-bottom: 20px;
}

.product-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.product-card > p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 20px;
  line-height: 1.7;
}

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

.product-tags span {
  background: rgba(124, 58, 237, 0.1);
  color: var(--secondary-light);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
}

/* ==================== 数据展示 ==================== */
.stats-section {
  padding: var(--section-padding);
  background: var(--gradient-primary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-card {
  text-align: center;
  padding: 32px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}

.stat-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.stat-value {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 8px;
}

.stat-number-animated {
  display: inline;
}

.stat-suffix {
  font-size: 32px;
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

/* ==================== 客户评价 ==================== */
.testimonials {
  padding: var(--section-padding);
  background: var(--bg-dark);
}

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  border-color: var(--secondary);
  transform: translateY(-4px);
}

.testimonial-content {
  margin-bottom: 24px;
}

.testimonial-content p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 18px;
}

.author-info {
  flex: 1;
}

.author-name {
  font-weight: 600;
  margin-bottom: 4px;
}

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

/* ==================== 价格方案 ==================== */
.pricing {
  padding: var(--section-padding);
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--primary) 100%);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--secondary);
}

.pricing-card-featured {
  border-color: var(--secondary);
  box-shadow: var(--shadow-glow);
  transform: scale(1.05);
}

.pricing-card-featured:hover {
  transform: scale(1.05) translateY(-8px);
}

.featured-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: white;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.pricing-header {
  margin-bottom: 32px;
}

.pricing-header h3 {
  font-size: 22px;
  margin-bottom: 16px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.price-currency {
  font-size: 24px;
  color: var(--text-secondary);
}

.price-amount {
  font-size: 42px;
  font-weight: 800;
  color: var(--secondary-light);
}

.price-period {
  font-size: 14px;
  color: var(--text-muted);
}

.price-text {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  text-align: left;
}

.pricing-features li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-secondary);
}

.pricing-features li.disabled {
  color: var(--text-muted);
  opacity: 0.5;
}

.pricing-features li:last-child {
  border-bottom: none;
}

/* ==================== FAQ ==================== */
.faq {
  padding: var(--section-padding);
  background: var(--primary);
}

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

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-item:hover {
  border-color: var(--secondary);
}

.faq-checkbox {
  display: none;
}

.faq-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 500;
}

.faq-question {
  font-size: 16px;
}

.faq-icon {
  width: 24px;
  height: 24px;
  position: relative;
  transition: transform var(--transition-normal);
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--text-secondary);
  transition: all var(--transition-normal);
}

.faq-icon::before {
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  transform: translateY(-50%);
}

.faq-icon::after {
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
}

.faq-checkbox:checked + .faq-label .faq-icon::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-checkbox:checked ~ .faq-content {
  max-height: 200px;
}

.faq-content p {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}

/* ==================== CTA 区域 ==================== */
.cta-section {
  padding: var(--section-padding);
  background: var(--bg-dark);
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.cta-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-subtitle {
  color: var(--text-secondary);
  margin-bottom: 40px;
  font-size: 18px;
}

.cta-form {
  margin-bottom: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.form-input {
  width: 100%;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 16px;
  transition: all var(--transition-fast);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 14px;
}

.contact-icon {
  font-size: 18px;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

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

.footer-desc {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}

.footer-links h4 {
  font-size: 16px;
  margin-bottom: 20px;
}

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

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--secondary-light);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 13px;
}

.footer-bottom p {
  margin-bottom: 8px;
}

/* ==================== 悬浮咨询按钮 ==================== */
.floating-consult {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
}

.consult-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.consult-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.5);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
  .pain-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-title {
    font-size: 36px;
  }
  
  .hero-subtitle {
    font-size: 16px;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-stats {
    flex-wrap: wrap;
    gap: 30px;
  }
  
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card-featured {
    transform: none;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .pain-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero {
    padding: 100px 0 60px;
  }
  
  .hero-title {
    font-size: 28px;
  }
  
  .stat-number {
    font-size: 28px;
  }
  
  .stat-card {
    padding: 20px;
  }
  
  .stat-value {
    font-size: 32px;
  }
  
  .consult-btn span:last-child {
    display: none;
  }
}

/* ============================================
   ICP 备案号样式
   ============================================ */
.icp-footer {
  text-align: center;
  padding: 15px 20px;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  margin-top: 24px;
}

.icp-footer a {
  color: var(--text-muted);
  text-decoration: none;
}

.icp-footer a:hover {
  color: var(--secondary-light);
  text-decoration: underline;
}