/* ============================================
   殴易App交易所 - 主样式表
   配色：深蓝色主题 + 金色强调色
   ============================================ */

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

:root {
  --primary-bg: #0a0e1a;
  --secondary-bg: #111827;
  --card-bg: #1a2234;
  --card-hover: #243049;
  --primary-color: #f0b90b;
  --primary-dark: #d4a00a;
  --secondary-color: #00c076;
  --text-primary: #ffffff;
  --text-secondary: #b0b8c9;
  --text-muted: #6b7280;
  --border-color: #2d3748;
  --gradient-primary: linear-gradient(135deg, #f0b90b 0%, #ffd666 100%);
  --gradient-dark: linear-gradient(135deg, #0a0e1a 0%, #1a2234 100%);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 4px 15px rgba(0, 0, 0, 0.2);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.8;
  overflow-x: hidden;
}

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

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

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   导航栏
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-brand-logo {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--primary-bg);
  font-size: 1.25rem;
}

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

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-login {
  color: var(--text-secondary);
  font-weight: 500;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--gradient-primary);
  color: var(--primary-bg);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(240, 185, 11, 0.4);
  color: var(--primary-bg);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: transparent;
  color: var(--primary-color);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid var(--primary-color);
  transition: var(--transition);
  cursor: pointer;
  font-family: inherit;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 6px 0;
  transition: var(--transition);
}

/* ============================================
   Hero 区域
   ============================================ */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
  background: var(--gradient-dark);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(240, 185, 11, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 192, 118, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #ffffff 0%, #f0b90b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 1s ease-out;
}

.hero-text .hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  margin-bottom: 48px;
  animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  animation: fadeInUp 1s ease-out 0.6s both;
}

.hero-stat-item {
  text-align: left;
}

.hero-stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 4px;
}

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

.hero-visual {
  position: relative;
  animation: fadeInRight 1s ease-out 0.3s both;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.hero-float-card {
  position: absolute;
  background: rgba(26, 34, 52, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-lg);
}

.hero-float-card.card-1 {
  top: -20px;
  left: -40px;
  animation: float 6s ease-in-out infinite;
}

.hero-float-card.card-2 {
  bottom: -30px;
  right: -30px;
  animation: float 6s ease-in-out infinite 2s;
}

.float-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  font-size: 1.5rem;
}

.float-card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.float-card-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--secondary-color);
}

/* ============================================
   通用 Section 样式
   ============================================ */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(240, 185, 11, 0.15);
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================
   核心特性 Features
   ============================================ */
.features {
  background: var(--secondary-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  background: rgba(240, 185, 11, 0.15);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 24px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

/* ============================================
   服务介绍 Services
   ============================================ */
.services {
  background: var(--primary-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  align-items: center;
}

.services-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.services-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.services-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.services-list {
  list-style: none;
  display: grid;
  gap: 16px;
}

.services-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.services-list li::before {
  content: '✓';
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: var(--secondary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 2px;
}

/* ============================================
   产品展示 Products
   ============================================ */
.products {
  background: var(--secondary-bg);
}

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

.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.product-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.product-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(240, 185, 11, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.product-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.product-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.product-change {
  font-size: 0.875rem;
  font-weight: 600;
}

.product-change.up {
  color: var(--secondary-color);
}

.product-change.down {
  color: #ef4444;
}

/* ============================================
   下载区域 Download
   ============================================ */
.download {
  background: linear-gradient(135deg, #1a2234 0%, #0a0e1a 100%);
  position: relative;
  overflow: hidden;
}

.download::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(240, 185, 11, 0.1) 0%, transparent 50%);
}

.download-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.download-text h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.download-text p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.download-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 28px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
}

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

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

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

.download-btn-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.download-btn-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.download-phone {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  width: 280px;
  height: 560px;
  background: var(--card-bg);
  border-radius: 40px;
  border: 8px solid #2d3748;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--primary-bg);
}

.phone-notch {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 28px;
  background: #2d3748;
  border-radius: 0 0 20px 20px;
}

/* ============================================
   行动号召 CTA
   ============================================ */
.cta {
  background: var(--gradient-primary);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.cta .container {
  position: relative;
  z-index: 2;
}

.cta h2 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-bg);
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.25rem;
  color: var(--primary-bg);
  opacity: 0.8;
  margin-bottom: 32px;
}

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

.cta .btn-primary:hover {
  background: #1a2234;
  color: var(--primary-color);
  box-shadow: 0 8px 25px rgba(10, 14, 26, 0.4);
}

/* ============================================
   页脚 Footer
   ============================================ */
.footer {
  background: #050810;
  padding: 80px 0 32px;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-brand {
  margin-bottom: 24px;
}

.footer-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 16px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 1.25rem;
}

.footer-social a:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 12px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--primary-color);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

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

.footer-links {
  display: flex;
  gap: 24px;
}

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

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

/* ============================================
   内页通用 - 页面头部 Banner
   ============================================ */
.page-banner {
  padding: 180px 0 100px;
  background: var(--gradient-dark);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 30%, rgba(240, 185, 11, 0.1) 0%, transparent 60%);
}

.page-banner .container {
  position: relative;
  z-index: 2;
}

.page-banner h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 0%, #f0b90b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-banner p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

/* ============================================
   关于我们页面
   ============================================ */
.about-intro {
  padding: 100px 0;
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.about-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

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

.mission-vision {
  padding: 100px 0;
  background: var(--secondary-bg);
}

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

.mv-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  transition: var(--transition);
}

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

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

.mv-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.mv-card p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.stats-section {
  padding: 80px 0;
  background: var(--primary-bg);
}

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

.stat-item h3 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.stat-item p {
  font-size: 1rem;
  color: var(--text-secondary);
}

.team-section {
  padding: 100px 0;
  background: var(--secondary-bg);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.team-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

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

.team-image {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.team-info {
  padding: 24px;
  text-align: center;
}

.team-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-role {
  font-size: 0.875rem;
  color: var(--primary-color);
}

/* ============================================
   联系我们页面
   ============================================ */
.contact-section {
  padding: 100px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info > p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  background: rgba(240, 185, 11, 0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-form-wrapper {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  background: var(--primary-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(240, 185, 11, 0.15);
}

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

.form-submit {
  width: 100%;
  justify-content: center;
  padding: 16px;
  font-size: 1rem;
}

/* ============================================
   产品中心页面
   ============================================ */
.products-detail {
  padding: 100px 0;
}

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

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

.product-detail-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
}

.product-detail-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.product-detail-icon {
  width: 56px;
  height: 56px;
  background: rgba(240, 185, 11, 0.15);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.product-detail-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.product-detail-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.product-features {
  list-style: none;
  display: grid;
  gap: 10px;
}

.product-features li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.product-features li::before {
  content: '◆';
  color: var(--primary-color);
  font-size: 0.75rem;
}

.faq-section {
  padding: 100px 0;
  background: var(--secondary-bg);
}

.faq-grid {
  display: grid;
  gap: 16px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 24px 28px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary-color);
}

.faq-icon {
  font-size: 1.5rem;
  color: var(--primary-color);
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 28px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================
   新闻列表页面
   ============================================ */
.news-section {
  padding: 100px 0;
}

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

.news-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.news-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.news-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.news-tag {
  padding: 2px 10px;
  background: rgba(240, 185, 11, 0.15);
  color: var(--primary-color);
  border-radius: 50px;
  font-size: 0.75rem;
}

.news-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
  transition: var(--transition);
}

.news-card:hover .news-title {
  color: var(--primary-color);
}

.news-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}

.pagination a {
  width: 40px;
  height: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.pagination a:hover,
.pagination a.active {
  background: var(--primary-color);
  color: var(--primary-bg);
  border-color: var(--primary-color);
}

/* ============================================
   新闻详情页面
   ============================================ */
.news-detail {
  padding: 100px 0;
}

.news-detail-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
}

.news-article {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
}

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

.article-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 24px;
}

.article-cover {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 32px;
}

.article-content {
  font-size: 1rem;
  line-height: 2;
  color: var(--text-secondary);
}

.article-content p {
  margin-bottom: 20px;
}

.article-content h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 16px;
}

.article-content ul {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content ul li {
  margin-bottom: 8px;
}

.article-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding: 16px 24px;
  background: rgba(240, 185, 11, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  font-style: italic;
  color: var(--text-primary);
}

.sidebar {
  display: grid;
  gap: 24px;
}

.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.sidebar-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-news-list {
  list-style: none;
  display: grid;
  gap: 16px;
}

.sidebar-news-item {
  display: flex;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-news-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.sidebar-news-image {
  width: 80px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}

.sidebar-news-info h4 {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 4px;
  transition: var(--transition);
}

.sidebar-news-item:hover h4 {
  color: var(--primary-color);
}

.sidebar-news-info time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

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

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

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

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-15px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
  .hero-text h1 {
    font-size: 2.75rem;
  }

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

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

  .about-intro-grid,
  .services-grid,
  .download-content,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .news-detail-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .nav-links,
  .nav-cta .btn-login {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--primary-bg);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
  }

  .hero {
    padding: 140px 0 80px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .hero-text h1 {
    font-size: 2.25rem;
  }

  .hero-visual {
    order: -1;
  }

  .hero-float-card.card-1 {
    left: -20px;
  }

  .hero-float-card.card-2 {
    right: -10px;
  }

  .hero-stats {
    gap: 20px;
  }

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

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 2rem;
  }

  .features-grid,
  .products-grid,
  .stats-grid,
  .team-grid,
  .mv-grid,
  .products-detail-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .page-banner {
    padding: 140px 0 60px;
  }

  .page-banner h1 {
    font-size: 2rem;
  }

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

  .news-article {
    padding: 24px;
  }

  .news-article .article-cover {
    height: 220px;
  }

  .contact-form-wrapper {
    padding: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 1.85rem;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 12px;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .section-title,
  .cta h2,
  .download-text h2 {
    font-size: 1.75rem;
  }

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

  .phone-mockup {
    width: 240px;
    height: 480px;
  }
}

/* ============================================
   滚动条美化
   ============================================ */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

/* ============================================
   选择高亮
   ============================================ */
::selection {
  background: var(--primary-color);
  color: var(--primary-bg);
}