/* ============================================
   ETH官网 - 以太坊钱包官网下载
   主题色: #627EEA (Ethereum 紫色)
   辅助色: #8CA0FF, #4A5FC1
   深色背景: #0F0F1A, #1A1A2E
   ============================================ */

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

:root {
  --primary: #627EEA;
  --primary-light: #8CA0FF;
  --primary-dark: #4A5FC1;
  --secondary: #00D4AA;
  --accent: #FF6B9D;
  --bg-dark: #0F0F1A;
  --bg-card: #1A1A2E;
  --bg-light: #F5F6FA;
  --text-white: #FFFFFF;
  --text-gray: #A0A0B8;
  --text-dark: #2D2D3F;
  --gradient-main: linear-gradient(135deg, #627EEA 0%, #8CA0FF 100%);
  --gradient-dark: linear-gradient(180deg, #0F0F1A 0%, #1A1A2E 100%);
  --shadow-sm: 0 2px 8px rgba(98, 126, 234, 0.1);
  --shadow-md: 0 8px 24px rgba(98, 126, 234, 0.15);
  --shadow-lg: 0 16px 48px rgba(98, 126, 234, 0.25);
  --shadow-glow: 0 0 40px rgba(98, 126, 234, 0.4);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

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

ul {
  list-style: none;
}

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

/* ===== 通用容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
  color: var(--text-dark);
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-gray);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-label {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(98, 126, 234, 0.1);
  color: var(--primary);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

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

/* ===== 按钮样式 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-main);
  color: var(--text-white);
  box-shadow: 0 4px 16px rgba(98, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(98, 126, 234, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--text-white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: var(--text-white);
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.9rem;
}

/* ===== 导航栏 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 15, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(15, 15, 26, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-white);
  font-weight: 700;
  font-size: 1.2rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-main);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-white);
}

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

.nav-link {
  padding: 10px 20px;
  color: var(--text-gray);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-white);
  background: rgba(98, 126, 234, 0.15);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-white);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  background: var(--gradient-dark);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 120px;
  padding-bottom: 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(98, 126, 234, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 30%, rgba(140, 160, 255, 0.1) 0%, transparent 50%);
  animation: heroGlow 15s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-5%, -5%); }
}

.hero-particles {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle, rgba(98, 126, 234, 0.3) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: particleFloat 20s linear infinite;
  opacity: 0.4;
}

@keyframes particleFloat {
  0% { background-position: 0 0; }
  100% { background-position: 500px 500px; }
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(98, 126, 234, 0.2);
  border: 1px solid rgba(98, 126, 234, 0.4);
  border-radius: 100px;
  color: var(--primary-light);
  font-size: 0.85rem;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease-out;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease-out 0.1s both;
}

.hero-text h1 .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text p {
  font-size: 1.15rem;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 36px;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

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

.hero-stat .stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-white);
}

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

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

.hero-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 480px;
  margin: 0 auto;
}

.hero-image-wrapper .ring {
  position: absolute;
  inset: 0;
  border: 2px solid rgba(98, 126, 234, 0.3);
  border-radius: 50%;
  animation: rotate 30s linear infinite;
}

.hero-image-wrapper .ring:nth-child(2) {
  inset: 10%;
  border-color: rgba(140, 160, 255, 0.2);
  animation-direction: reverse;
  animation-duration: 25s;
}

.hero-image-wrapper .ring:nth-child(3) {
  inset: 20%;
  border-color: rgba(0, 212, 170, 0.2);
  animation-duration: 20s;
}

@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.hero-image-wrapper img {
  position: absolute;
  inset: 25%;
  border-radius: 50%;
  box-shadow: var(--shadow-glow);
  animation: float 6s ease-in-out infinite;
}

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

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

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

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

.feature-card {
  background: var(--text-white);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  transition: var(--transition);
  border: 1px solid rgba(98, 126, 234, 0.08);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

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

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

.feature-icon {
  width: 64px;
  height: 64px;
  background: rgba(98, 126, 234, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 24px;
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
}

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

/* ===== 服务介绍 ===== */
.services {
  background: var(--bg-dark);
  color: var(--text-white);
}

.services .section-title {
  color: var(--text-white);
}

.services .section-subtitle {
  color: var(--text-gray);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  margin-top: 48px;
}

.service-item {
  display: flex;
  gap: 24px;
  padding: 32px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.service-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(98, 126, 234, 0.4);
  transform: translateY(-4px);
}

.service-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--gradient-main);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
}

.service-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.service-info p {
  color: var(--text-gray);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ===== 详细内容区 ===== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

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

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

.about-text .section-label {
  margin-bottom: 16px;
}

.about-text h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  line-height: 1.3;
}

.about-text p {
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.about-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.about-feature-item .check {
  width: 24px;
  height: 24px;
  background: rgba(98, 126, 234, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 0.8rem;
}

.about-feature-item span {
  color: var(--text-dark);
  font-weight: 500;
}

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

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

.product-card {
  background: var(--text-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid rgba(98, 126, 234, 0.08);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  aspect-ratio: 16/10;
  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(1.05);
}

.product-info {
  padding: 28px;
}

.product-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.product-info p {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.product-info .btn-link {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

/* ===== 新闻列表 ===== */
.news-list {
  background: var(--bg-light);
}

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

.news-card {
  background: var(--text-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid rgba(98, 126, 234, 0.08);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.news-image {
  aspect-ratio: 16/9;
  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(1.05);
}

.news-body {
  padding: 28px;
}

.news-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 0.85rem;
  color: var(--text-gray);
}

.news-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
  line-height: 1.4;
  transition: var(--transition);
}

.news-card:hover .news-body h3 {
  color: var(--primary);
}

.news-body p {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== FAQ区域 ===== */
.faq {
  background: var(--text-white);
}

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

.faq-item {
  border-bottom: 1px solid rgba(98, 126, 234, 0.1);
}

.faq-question {
  width: 100%;
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  transition: var(--transition);
}

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

.faq-question .icon {
  width: 28px;
  height: 28px;
  background: rgba(98, 126, 234, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

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

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

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 24px;
}

.faq-answer p {
  color: var(--text-gray);
  line-height: 1.8;
}

/* ===== 行动号召(CTA) ===== */
.cta {
  position: relative;
  background: var(--bg-dark);
  padding: 100px 0;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(98, 126, 234, 0.2) 0%, transparent 70%);
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-content p {
  font-size: 1.1rem;
  color: var(--text-gray);
  margin-bottom: 36px;
}

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

/* ===== 联系方式 ===== */
.contact-section {
  background: var(--bg-light);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact-info {
  background: var(--text-white);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(98, 126, 234, 0.08);
}

.contact-item:last-child {
  border-bottom: none;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: rgba(98, 126, 234, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-detail h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 4px;
}

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

.contact-form {
  background: var(--text-white);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.contact-form h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 24px;
}

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

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

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(98, 126, 234, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  background: var(--bg-light);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(98, 126, 234, 0.1);
  background: var(--text-white);
}

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

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

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: var(--text-gray);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 60px;
}

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

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 320px;
}

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

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-gray);
  font-size: 1.1rem;
  transition: var(--transition);
}

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

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

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

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

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

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

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

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

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

/* ===== 面包屑导航 ===== */
.breadcrumb {
  background: var(--bg-dark);
  padding: 120px 0 40px;
  color: var(--text-gray);
}

.breadcrumb h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}

.breadcrumb-nav {
  font-size: 0.9rem;
}

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

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

.breadcrumb-nav span {
  margin: 0 8px;
  color: var(--text-gray);
}

/* ===== 新闻详情页 ===== */
.article-content {
  max-width: 800px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 40px;
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.4;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  gap: 24px;
  color: var(--text-gray);
  font-size: 0.9rem;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-cover {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 40px;
  box-shadow: var(--shadow-md);
}

.article-body {
  font-size: 1.05rem;
  line-height: 2;
  color: var(--text-dark);
}

.article-body p {
  margin-bottom: 24px;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 40px 0 20px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 32px 0 16px;
}

.article-body ul,
.article-body ol {
  margin: 16px 0 24px 24px;
}

.article-body li {
  margin-bottom: 12px;
  color: var(--text-dark);
}

/* ===== 回顶按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--gradient-main);
  color: var(--text-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(98, 126, 234, 0.5);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .products-grid,
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .hero-text h1 {
    font-size: 2.8rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-link {
    width: 100%;
    padding: 14px 20px;
  }
  
  .header-actions .btn-primary {
    display: none;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .hero {
    padding-top: 100px;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .hero-text h1 {
    font-size: 2.2rem;
  }
  
  .hero-text p {
    font-size: 1rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
    gap: 24px;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .features-grid,
  .services-grid,
  .products-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .cta-content h2 {
    font-size: 1.8rem;
  }
  
  .breadcrumb h1 {
    font-size: 1.8rem;
  }
  
  .article-header h1 {
    font-size: 1.5rem;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .hero-text h1 {
    font-size: 1.8rem;
  }
  
  .hero-stat {
    text-align: center;
  }
  
  .btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
  }
  
  .feature-card,
  .service-item,
  .contact-info,
  .contact-form {
    padding: 24px 20px;
  }
}