/* 全局样式 - SaaS科技公司风格 */
:root {
  --primary-blue: #1e3cb4;
  --primary-purple: #6c3bdb;
  --accent-cyan: #00d4ff;
  --accent-green: #00e676;
  --bg-dark: #0a0e27;
  --bg-card: #141832;
  --bg-light: #f4f7ff;
  --text-primary: #ffffff;
  --text-secondary: #b0b8d4;
  --text-dark: #1a1a2e;
  --gradient-main: linear-gradient(135deg, #1e3cb4 0%, #6c3bdb 50%, #9b59b6 100%);
  --gradient-card: linear-gradient(145deg, #1a2040 0%, #141832 100%);
  --gradient-btn: linear-gradient(135deg, #00e676 0%, #00d4ff 100%);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-btn: 0 4px 16px rgba(0, 212, 255, 0.3);
  --border-radius: 12px;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.8;
  min-height: 100vh;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent-green);
}

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

/* 导航栏 */
.navbar {
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(100, 200, 255, 0.1);
  padding: 1rem 2rem;
  z-index: 1000;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.nav-menu a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-primary);
  background: rgba(100, 200, 255, 0.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: 0.3s;
}

/* 面包屑导航 */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--accent-cyan);
}

.breadcrumb span {
  margin: 0 0.5rem;
  color: var(--text-secondary);
}

/* 主内容区 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* 英雄区 */
.hero {
  background: var(--gradient-main);
  padding: 4rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(108, 59, 219, 0.2) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.hero p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* 设备检测区 */
.device-detect {
  background: var(--gradient-card);
  border: 1px solid rgba(100, 200, 255, 0.2);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin: 2rem auto;
  max-width: 600px;
  text-align: center;
}

.device-detect .device-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.device-detect .detect-text {
  color: var(--accent-cyan);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

/* 按钮样式 */
.btn-primary {
  display: inline-block;
  background: var(--gradient-btn);
  color: var(--bg-dark);
  font-weight: 700;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-size: 1.1rem;
  box-shadow: var(--shadow-btn);
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 212, 255, 0.5);
  color: var(--bg-dark);
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--accent-cyan);
  border: 2px solid var(--accent-cyan);
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-size: 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent-cyan);
}

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  padding: 2rem 0;
}

.card {
  background: var(--gradient-card);
  border: 1px solid rgba(100, 200, 255, 0.1);
  border-radius: var(--border-radius);
  padding: 2rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-main);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  color: var(--text-primary);
}

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

.card .tag {
  display: inline-block;
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent-cyan);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  margin-top: 1rem;
  margin-right: 0.5rem;
}

/* 内容区块 */
.section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 1rem;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

/* 文字内容区 */
.content-block {
  background: var(--gradient-card);
  border: 1px solid rgba(100, 200, 255, 0.1);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  margin-bottom: 2rem;
}

.content-block h2 {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
}

.content-block h3 {
  font-size: 1.3rem;
  margin: 1.5rem 0 1rem;
  color: var(--text-primary);
}

.content-block p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.9;
}

.content-block ul,
.content-block ol {
  color: var(--text-secondary);
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.content-block li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

/* 表格样式 */
.table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--border-radius);
  border: 1px solid rgba(100, 200, 255, 0.1);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
}

.data-table th {
  background: var(--gradient-main);
  color: var(--text-primary);
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.data-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid rgba(100, 200, 255, 0.05);
  color: var(--text-secondary);
}

.data-table tr:hover td {
  background: rgba(100, 200, 255, 0.03);
}

.data-table .status-yes {
  color: var(--accent-green);
  font-weight: 600;
}

.data-table .status-no {
  color: #ff5252;
}

/* FAQ样式 */
.faq-item {
  background: var(--gradient-card);
  border: 1px solid rgba(100, 200, 255, 0.1);
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  padding: 1.5rem 2rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-primary);
  transition: background 0.3s ease;
}

.faq-question:hover {
  background: rgba(100, 200, 255, 0.05);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
}

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

.faq-answer {
  padding: 0 2rem;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  padding: 0 2rem 1.5rem;
  max-height: 500px;
}

/* 下载区域 */
.download-section {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--gradient-card);
  border-radius: var(--border-radius);
  border: 1px solid rgba(100, 200, 255, 0.15);
  margin: 2rem 0;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(100, 200, 255, 0.2);
  border-radius: 12px;
  padding: 1rem 2rem;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.download-btn:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.download-btn .icon {
  font-size: 2rem;
}

.download-btn .info {
  text-align: left;
}

.download-btn .info small {
  display: block;
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.download-btn .info strong {
  font-size: 1rem;
}

/* 测速动画 */
.speed-meter {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 8px solid rgba(100, 200, 255, 0.2);
  margin: 2rem auto;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--bg-card);
}

.speed-meter::before {
  content: '';
  position: absolute;
  top: -8px;
  left: -8px;
  right: -8px;
  bottom: -8px;
  border-radius: 50%;
  border: 8px solid transparent;
  border-top-color: var(--accent-cyan);
  border-right-color: var(--accent-green);
  animation: spin 2s linear infinite;
}

.speed-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.speed-unit {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 设备Tab切换 */
.device-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.device-tab {
  padding: 0.8rem 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(100, 200, 255, 0.1);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.device-tab:hover,
.device-tab.active {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

/* 页脚 */
.footer {
  background: rgba(10, 14, 39, 0.98);
  border-top: 1px solid rgba(100, 200, 255, 0.1);
  padding: 3rem 2rem 1.5rem;
  margin-top: 4rem;
}

.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

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

.footer-col a {
  display: block;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(100, 200, 255, 0.05);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* 图片容器 */
.img-container {
  border-radius: var(--border-radius);
  overflow: hidden;
  margin: 2rem 0;
  border: 1px solid rgba(100, 200, 255, 0.1);
}

.img-container img {
  width: 100%;
  height: auto;
  display: block;
}

/* 特性列表 */
.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  border: 1px solid rgba(100, 200, 255, 0.05);
}

.feature-item .icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: var(--gradient-main);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.feature-item .text h4 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
}

.feature-item .text p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* 步骤指南 */
.steps {
  counter-reset: step;
  margin: 2rem 0;
}

.step-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--gradient-card);
  border-radius: var(--border-radius);
  border: 1px solid rgba(100, 200, 255, 0.1);
}

.step-item::before {
  counter-increment: step;
  content: counter(step);
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.step-content h4 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.98);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid rgba(100, 200, 255, 0.1);
  }

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

  .nav-toggle {
    display: flex;
  }

  .navbar {
    position: relative;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

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

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

  .section-title {
    font-size: 1.5rem;
  }

  .container {
    padding: 0 1rem;
  }

  .content-block {
    padding: 1.5rem;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }

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

  .step-item {
    flex-direction: column;
    gap: 1rem;
  }

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

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero {
    padding: 2.5rem 1rem;
  }

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

  .device-tabs {
    gap: 0.3rem;
  }

  .device-tab {
    padding: 0.6rem 1rem;
    font-size: 0.8rem;
  }
}

/* 页面内容区域 - 白色背景变体 */
.page-content {
  padding: 3rem 0;
}

/* 线路卡片 */
.line-card {
  background: var(--gradient-card);
  border: 1px solid rgba(100, 200, 255, 0.1);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.line-card .line-info h4 {
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.line-card .line-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.line-card .line-status {
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.line-card .line-status.good {
  background: rgba(0, 230, 118, 0.1);
  color: var(--accent-green);
}

.line-card .line-status.normal {
  background: rgba(255, 193, 7, 0.1);
  color: #ffc107;
}

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

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* 脉冲动画 */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}