/* ============================================
   binance最新官网 - 主样式表
   配色：币安黄 #F0B90B + 深色主题
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --primary-color: #F0B90B;
  --primary-dark: #D4A00A;
  --primary-light: #FCD535;
  --secondary-color: #848E9C;
  --dark-bg: #0B0E11;
  --dark-bg-2: #1E2329;
  --dark-bg-3: #2B3139;
  --dark-card: #181A20;
  --text-white: #EAECEF;
  --text-light: #B7BDC6;
  --text-muted: #848E9C;
  --success: #0ECB81;
  --danger: #F6465D;
  --border-color: #2B3139;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-primary: 0 8px 30px rgba(240, 185, 11, 0.25);
  --transition: all 0.3s ease;
  --radius: 8px;
  --radius-lg: 16px;
  --max-width: 1200px;
}

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

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--dark-bg);
  color: var(--text-white);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* ---------- 通用容器 ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 80px 0;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-white);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 48px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 按钮样式 ---------- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: var(--dark-bg);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
  color: var(--dark-bg);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(240, 185, 11, 0.4);
}

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

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

.btn-white {
  background: var(--text-white);
  color: var(--dark-bg);
}

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

/* ---------- Header / 导航栏 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 14, 17, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary-color);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark-bg);
  font-weight: 900;
  font-size: 1.1rem;
}

.logo-text {
  color: var(--text-white);
}

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

.nav-link {
  padding: 8px 16px;
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  background: rgba(240, 185, 11, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-actions .btn {
  padding: 10px 22px;
  font-size: 0.9rem;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: transparent;
}

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

/* ---------- Hero 区 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-bg-2) 50%, #262930 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(240, 185, 11, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14, 203, 129, 0.08) 0%, transparent 70%);
  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: fadeInLeft 0.8s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(240, 185, 11, 0.1);
  border: 1px solid rgba(240, 185, 11, 0.3);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--primary-color);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  color: var(--primary-color);
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-light);
  margin-bottom: 36px;
  max-width: 520px;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

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

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-color);
  display: block;
}

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

/* Hero 右侧视觉 */
.hero-visual {
  position: relative;
  animation: fadeInRight 0.8s ease-out;
}

.hero-image {
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
  position: relative;
  z-index: 2;
}

.hero-float-card {
  position: absolute;
  background: var(--dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow);
  z-index: 3;
  animation: floatUp 4s ease-in-out infinite;
}

.hero-float-card.card-1 {
  top: -20px;
  left: -40px;
  animation-delay: 0s;
}

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

.float-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.float-icon.yellow {
  background: rgba(240, 185, 11, 0.15);
  color: var(--primary-color);
}

.float-icon.green {
  background: rgba(14, 203, 129, 0.15);
  color: var(--success);
}

.float-text strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-white);
}

.float-text span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- 核心特性区 ---------- */
.features {
  background: var(--dark-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--success));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.feature-card:hover {
  border-color: rgba(240, 185, 11, 0.4);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(240, 185, 11, 0.15), rgba(240, 185, 11, 0.05));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 24px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
}

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

/* ---------- 服务介绍区 ---------- */
.services {
  background: var(--dark-bg-2);
}

.services-wrapper {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

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

.service-row.reverse {
  direction: rtl;
}

.service-row.reverse > * {
  direction: ltr;
}

.service-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}

.service-content p {
  color: var(--text-light);
  margin-bottom: 20px;
  font-size: 1rem;
  line-height: 1.8;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

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

.service-list li::before {
  content: '✓';
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background: rgba(240, 185, 11, 0.15);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  margin-top: 2px;
}

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

.service-image-wrapper img {
  width: 100%;
  transition: transform 0.6s ease;
}

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

/* ---------- 详细内容区（安全保障） ---------- */
.security {
  background: var(--dark-bg);
}

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

.security-card {
  background: linear-gradient(135deg, var(--dark-card) 0%, rgba(30, 35, 41, 0.8) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  gap: 24px;
  transition: var(--transition);
}

.security-card:hover {
  border-color: rgba(240, 185, 11, 0.3);
  transform: translateY(-4px);
}

.security-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--primary-color);
  color: var(--dark-bg);
  font-weight: 800;
  font-size: 1.25rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.security-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.security-card p {
  color: var(--text-light);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ---------- 数据统计区 ---------- */
.stats-bar {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  padding: 60px 0;
}

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

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

.stats-bar .stat-value {
  font-size: 2.75rem;
  color: var(--dark-bg);
  font-weight: 800;
}

.stats-bar .stat-label {
  color: rgba(11, 14, 17, 0.75);
  font-size: 1rem;
  font-weight: 500;
}

/* ---------- 产品区 ---------- */
.products {
  background: var(--dark-bg-2);
}

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

.product-card {
  background: var(--dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}

.product-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.product-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.product-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
}

.product-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- 常见问题 FAQ ---------- */
.faq {
  background: var(--dark-bg);
}

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

.faq-item {
  background: var(--dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--primary-color);
}

.faq-question {
  width: 100%;
  padding: 22px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  color: var(--text-white);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  transition: var(--transition);
}

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

.faq-toggle {
  font-size: 1.25rem;
  color: var(--primary-color);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 28px 22px;
}

.faq-answer p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- CTA 区 ---------- */
.cta {
  background: linear-gradient(135deg, var(--dark-bg-2) 0%, var(--dark-bg) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(240, 185, 11, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.cta .container {
  position: relative;
  z-index: 1;
}

.cta h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ---------- Footer ---------- */
.site-footer {
  background: var(--dark-bg);
  border-top: 1px solid var(--border-color);
  padding: 72px 0 32px;
}

.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: 0.9rem;
  line-height: 1.8;
  margin-top: 16px;
  max-width: 320px;
}

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

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

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

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

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

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

/* ---------- 内页通用 Banner ---------- */
.page-banner {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-bg-2) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(240, 185, 11, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.page-banner h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.page-banner p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

.breadcrumb a {
  color: var(--text-muted);
}

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

/* ---------- 关于我们页 ---------- */
.about-hero-content {
  text-align: center;
}

.about-section {
  background: var(--dark-bg);
}

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

.about-text h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

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

/* 核心价值观 */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.value-card {
  background: var(--dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  transition: var(--transition);
}

.value-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-6px);
}

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

.value-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
}

.value-card p {
  color: var(--text-light);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* 时间线 */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding: 24px 0;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  padding-right: 60px;
  text-align: right;
  left: 0;
}

.timeline-item:nth-child(even) {
  padding-left: 60px;
  left: 50%;
}

.timeline-item::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--primary-color);
  border: 3px solid var(--dark-bg);
  border-radius: 50%;
  top: 30px;
  z-index: 2;
}

.timeline-item:nth-child(odd)::before {
  right: -9px;
}

.timeline-item:nth-child(even)::before {
  left: -9px;
}

.timeline-year {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.timeline-item h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 6px;
}

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

/* ---------- 产品页 ---------- */
.products-detail {
  background: var(--dark-bg);
}

.product-detail-card {
  background: var(--dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin-bottom: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  transition: var(--transition);
}

.product-detail-card:hover {
  border-color: rgba(240, 185, 11, 0.3);
}

.product-detail-card.reverse {
  direction: rtl;
}

.product-detail-card.reverse > * {
  direction: ltr;
}

.product-detail-image {
  border-radius: var(--radius);
  overflow: hidden;
}

.product-detail-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}

.product-detail-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 20px;
}

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

.product-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-light);
  font-size: 0.92rem;
}

.product-features li::before {
  content: '★';
  color: var(--primary-color);
}

/* ---------- 新闻列表页 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

.news-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.news-image {
  aspect-ratio: 16/10;
  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;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.news-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(240, 185, 11, 0.15);
  color: var(--primary-color);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.news-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 10px;
  line-height: 1.5;
}

.news-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
  flex: 1;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--primary-color);
  font-size: 0.88rem;
  font-weight: 500;
}

.read-more:hover {
  gap: 10px;
}

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

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

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

/* ---------- 新闻详情页 ---------- */
.news-detail {
  background: var(--dark-bg);
}

.news-detail-wrapper {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
}

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

.news-detail-main h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
  line-height: 1.4;
}

.news-detail-meta {
  display: flex;
  gap: 20px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 28px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.news-detail-content {
  color: var(--text-light);
  line-height: 1.9;
  font-size: 1rem;
}

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

.news-detail-content h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-white);
  margin: 32px 0 16px;
}

.news-detail-content img {
  border-radius: var(--radius);
  margin: 24px 0;
}

/* 侧边栏 */
.news-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.sidebar-box h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-news-item {
  display: flex;
  gap: 14px;
  transition: var(--transition);
}

.sidebar-news-item:hover {
  opacity: 0.85;
}

.sidebar-news-item img {
  width: 80px;
  height: 60px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}

.sidebar-news-item h4 {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-white);
  line-height: 1.4;
  margin-bottom: 4px;
}

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

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

.contact-form-box,
.contact-info-box {
  background: var(--dark-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-form h2,
.contact-info-box h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 18px;
  background: var(--dark-bg-2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-white);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary-color);
  outline: none;
  background: var(--dark-bg-3);
}

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

.form-group select {
  appearance: none;
  cursor: pointer;
}

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

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

.contact-info-item .icon {
  width: 48px;
  height: 48px;
  background: rgba(240, 185, 11, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-info-item h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 4px;
}

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

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--primary-color);
  color: var(--dark-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-light);
  transform: translateY(-4px);
}

/* ---------- 动画 ---------- */
@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

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

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

/* 滚动触发动画 */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    max-width: 500px;
    margin: 0 auto;
  }

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

  .service-row {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .service-row.reverse {
    direction: ltr;
  }

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

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

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

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

  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .product-detail-card {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .product-detail-card.reverse {
    direction: ltr;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--dark-bg);
    flex-direction: column;
    padding: 20px;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .header-actions {
    display: none;
  }

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero h1 {
    font-size: 2rem;
  }

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

  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .stat-value {
    font-size: 1.35rem;
  }

  .section-padding {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

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

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

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

  .stats-bar .container {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .stats-bar .stat-value {
    font-size: 2rem;
  }

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

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

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(even),
  .timeline-item:nth-child(odd) {
    width: 100%;
    left: 0;
    padding-left: 60px;
    padding-right: 0;
    text-align: left;
  }

  .timeline-item::before,
  .timeline-item:nth-child(odd)::before,
  .timeline-item:nth-child(even)::before {
    left: 12px;
    right: auto;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .page-banner {
    padding: 130px 0 60px;
  }

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

  .news-detail-main {
    padding: 28px;
  }

  .contact-form-box,
  .contact-info-box {
    padding: 28px;
  }

  .hero-float-card.card-1 {
    left: -10px;
  }

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

  .cta h2 {
    font-size: 1.85rem;
  }

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

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

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

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

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .stats-bar .container {
    grid-template-columns: 1fr;
  }
}