/* ============================================
   TRX交易所平台 - 全局样式表
   ============================================ */

/* CSS 变量 */
:root {
  --primary: #2596be;
  --primary-dark: #1a6f8f;
  --primary-light: #4ec4e8;
  --secondary: #f7a440;
  --accent: #7c3aed;
  --bg-dark: #0b1120;
  --bg-card: #131b2e;
  --bg-card-hover: #1b2540;
  --text-primary: #ffffff;
  --text-secondary: #b0bacd;
  --text-muted: #7a8499;
  --border: rgba(255, 255, 255, 0.08);
  --gradient-primary: linear-gradient(135deg, #2596be 0%, #7c3aed 100%);
  --gradient-hero: linear-gradient(160deg, #0b1120 0%, #131b2e 45%, #1a3055 100%);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.3);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul, ol { list-style: none; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 容器 */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   导航栏 Header
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 17, 32, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

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

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
  box-shadow: 0 4px 20px rgba(37, 150, 190, 0.4);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.nav-cta {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}

.btn-outline {
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  color: var(--text-primary);
  border-color: var(--primary-light);
  background: rgba(37, 150, 190, 0.1);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(37, 150, 190, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37, 150, 190, 0.5);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

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

/* ============================================
   Hero 区域
   ============================================ */
.hero {
  min-height: 100vh;
  padding: 140px 0 80px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(37, 150, 190, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  animation: fadeInUp 0.8s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(37, 150, 190, 0.15);
  border: 1px solid rgba(37, 150, 190, 0.3);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--primary-light);
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--primary-light);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
}

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

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 520px;
}

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

.hero-stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

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

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.hero-image {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.hero-float-card {
  position: absolute;
  background: rgba(19, 27, 46, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  animation: float 4s ease-in-out infinite;
}

.hero-float-card.card-1 {
  top: 30px;
  left: -30px;
  animation-delay: 0s;
}

.hero-float-card.card-2 {
  bottom: 40px;
  right: -30px;
  animation-delay: 1.5s;
}

.float-card-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.float-card-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-light);
}

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

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
}

.section-header {
  margin-bottom: 64px;
}

/* ============================================
   核心特性 Features
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  border-color: rgba(37, 150, 190, 0.3);
  box-shadow: var(--shadow-lg);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(37, 150, 190, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.6rem;
  color: var(--primary-light);
}

.feature-title {
  font-size: 1.2rem;
  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-section {
  background: linear-gradient(180deg, var(--bg-dark) 0%, #0f1830 50%, var(--bg-dark) 100%);
}

.services-grid {
  display: grid;
  gap: 32px;
}

.service-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.service-item:nth-child(even) {
  direction: rtl;
}

.service-item:nth-child(even) > * {
  direction: ltr;
}

.service-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.service-image img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.service-item:hover .service-image img {
  transform: scale(1.05);
}

.service-content h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.service-content p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.service-feature-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(37, 150, 190, 0.2);
  color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* ============================================
   数据统计 Stats
   ============================================ */
.stats-section {
  background: var(--gradient-primary);
  padding: 80px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

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

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
}

/* ============================================
   产品列表 Products Page
   ============================================ */
.page-banner {
  padding: 160px 0 80px;
  background: var(--gradient-hero);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(37, 150, 190, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.page-banner h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
}

.page-banner p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

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

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(37, 150, 190, 0.35);
  box-shadow: var(--shadow-lg);
}

.product-image {
  height: 200px;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.08);
}

.product-body {
  padding: 28px;
}

.product-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary-light);
  background: rgba(37, 150, 190, 0.15);
  border-radius: 50px;
  margin-bottom: 14px;
}

.product-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.product-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.7;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-light);
  font-weight: 600;
  font-size: 0.95rem;
}

.product-link:hover {
  gap: 10px;
}

/* ============================================
   新闻列表 News
   ============================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

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

.news-card:hover {
  transform: translateY(-6px);
  border-color: rgba(37, 150, 190, 0.35);
  box-shadow: var(--shadow-lg);
}

.news-image {
  height: 200px;
  overflow: hidden;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.news-card:hover .news-image img {
  transform: scale(1.08);
}

.news-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.news-category {
  color: var(--primary-light);
  font-weight: 600;
}

.news-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.5;
  transition: var(--transition);
}

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

.news-excerpt {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  flex: 1;
}

/* 新闻详情 */
.news-detail {
  padding: 160px 0 80px;
}

.news-detail-container {
  max-width: 820px;
  margin: 0 auto;
}

.news-detail-header {
  margin-bottom: 40px;
}

.news-detail-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 20px;
}

.news-detail-meta {
  display: flex;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.news-detail-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}

.news-detail-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.news-detail-content {
  font-size: 1.05rem;
  line-height: 2;
  color: var(--text-secondary);
}

.news-detail-content p {
  margin-bottom: 24px;
}

.news-detail-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 16px;
}

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

.about-text h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.about-image img {
  width: 100%;
  height: 440px;
  object-fit: cover;
}

/* 团队 */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}

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

.team-card:hover {
  transform: translateY(-6px);
  border-color: rgba(37, 150, 190, 0.3);
}

.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 20px;
  overflow: hidden;
  border: 3px solid var(--gradient-primary);
}

.team-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.team-role {
  color: var(--primary-light);
  font-size: 0.9rem;
}

/* 资质 */
.licenses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.license-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.license-card:hover {
  border-color: var(--primary-light);
}

.license-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.license-name {
  font-weight: 600;
  margin-bottom: 6px;
}

.license-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============================================
   联系我们 Contact
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  gap: 20px;
  transition: var(--transition);
}

.contact-card:hover {
  border-color: rgba(37, 150, 190, 0.35);
}

.contact-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(37, 150, 190, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

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

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-light);
  background: rgba(255, 255, 255, 0.06);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

/* ============================================
   FAQ
   ============================================ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 820px;
  margin: 0 auto;
}

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

.faq-item.active {
  border-color: rgba(37, 150, 190, 0.35);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 28px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  background: none;
  cursor: pointer;
}

.faq-question-icon {
  transition: transform 0.3s ease;
  color: var(--primary-light);
  font-size: 1.3rem;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 28px 22px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================
   CTA
   ============================================ */
.cta-section {
  padding: 100px 0;
  text-align: center;
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
}

.cta-desc {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto 36px;
  position: relative;
}

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

.btn-white {
  background: #fff;
  color: var(--primary);
  font-weight: 700;
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.btn-outline-white {
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.7);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: #070c18;
  border-top: 1px solid var(--border);
  padding: 70px 0 30px;
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-top: 16px;
  line-height: 1.8;
  max-width: 320px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--gradient-primary);
  transform: translateY(-3px);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.92rem;
  transition: var(--transition);
}

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

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
  .service-item,
  .about-content,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .service-item:nth-child(even) {
    direction: ltr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-menu,
  .nav-cta {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .nav-menu.open {
    display: flex;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: var(--bg-card);
    padding: 20px;
    border-bottom: 1px solid var(--border);
  }
  .nav-menu.open + .nav-cta {
    display: flex;
    position: absolute;
    top: calc(72px + 280px);
    left: 0;
    width: 100%;
    flex-direction: column;
    padding: 20px;
    background: var(--bg-card);
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero {
    padding: 120px 0 60px;
  }
  .hero-image {
    height: 320px;
  }
  .hero-float-card.card-1 {
    left: 10px;
  }
  .hero-float-card.card-2 {
    right: 10px;
  }
  .section {
    padding: 70px 0;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .news-detail-image img,
  .service-image img,
  .about-image img {
    height: 280px;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }
  .hero-stat-value {
    font-size: 1.4rem;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .btn-lg {
    padding: 14px 28px;
    font-size: 0.95rem;
  }
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: rgba(37, 150, 190, 0.3);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(37, 150, 190, 0.5);
}