/* ============================================
   ETH钱包官网 - 全局样式表
   配色：以太坊紫蓝色系 (#627EEA, #4A6CF7)
   ============================================ */

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

/* ---- 自定义属性 ---- */
:root {
  --primary: #627EEA;
  --primary-dark: #4A6CF7;
  --primary-light: #8B9FF7;
  --accent: #34D399;
  --bg-dark: #0B1120;
  --bg-card: #111827;
  --bg-section: #151C2E;
  --text-primary: #F9FAFB;
  --text-secondary: #B0B8C8;
  --text-muted: #6B7280;
  --border-color: #1F2937;
  --gradient-primary: linear-gradient(135deg, #627EEA 0%, #4A6CF7 50%, #3B5BDB 100%);
  --gradient-bg: linear-gradient(180deg, #0B1120 0%, #111827 100%);
  --shadow-card: 0 4px 24px rgba(98, 126, 234, 0.15);
  --shadow-hover: 0 8px 40px rgba(98, 126, 234, 0.25);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --container-max: 1200px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- 基础样式 ---- */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* ---- 容器 ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---- 导航栏 ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 17, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(11, 17, 32, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-brand .brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-menu a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 0.5rem 0;
}

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

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

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

.nav-cta {
  padding: 0.6rem 1.5rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  color: #fff !important;
  font-weight: 600;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(98, 126, 234, 0.4);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

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

/* ---- Hero区域 ---- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(98, 126, 234, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(52, 211, 153, 0.1) 0%, transparent 50%),
    var(--gradient-bg);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23627EEA' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {
  animation: fadeInUp 1s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(98, 126, 234, 0.15);
  border: 1px solid rgba(98, 126, 234, 0.3);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--primary-light);
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #FFFFFF 0%, #C7D2FE 50%, #818CF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(98, 126, 234, 0.4);
  color: #fff;
}

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

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-3px);
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
}

.stat-item h3 {
  font-size: 1.75rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item p {
  font-size: 0.85rem;
  margin: 0;
}

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

.hero-visual img {
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.hero-float-card {
  position: absolute;
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-card);
  animation: float 4s ease-in-out infinite;
}

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

.hero-float-card.card-2 {
  bottom: 15%;
  right: -5%;
  animation-delay: 2s;
}

.float-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.float-icon.green { background: rgba(52, 211, 153, 0.2); color: var(--accent); }
.float-icon.blue { background: rgba(98, 126, 234, 0.2); color: var(--primary); }

.float-text strong {
  display: block;
  font-size: 0.9rem;
}

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

/* ---- 通用Section ---- */
section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.section-tag {
  display: inline-block;
  padding: 0.3rem 1rem;
  background: rgba(98, 126, 234, 0.15);
  border: 1px solid rgba(98, 126, 234, 0.3);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--primary-light);
  margin-bottom: 1rem;
  letter-spacing: 1px;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  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);
  transform-origin: left;
  transition: var(--transition);
}

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

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(98, 126, 234, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.95rem;
  margin: 0;
}

/* ---- 服务介绍 ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.service-item {
  display: flex;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.service-item:hover {
  border-color: var(--primary);
  transform: translateX(8px);
}

.service-num {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
}

.service-item h3 {
  margin-bottom: 0.75rem;
}

/* ---- 详细介绍区 ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-visual img {
  border-radius: var(--radius-lg);
}

.about-content h2 {
  margin-bottom: 1.5rem;
}

.about-content p {
  margin-bottom: 1.25rem;
}

.about-list {
  list-style: none;
  margin-top: 1.5rem;
}

.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  color: var(--text-secondary);
}

.about-list li::before {
  content: '✓';
  color: var(--accent);
  font-weight: bold;
  flex-shrink: 0;
  margin-top: 2px;
}

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

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

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

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

.product-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.product-info {
  padding: 1.5rem;
}

.product-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(52, 211, 153, 0.15);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.75rem;
  margin-bottom: 0.75rem;
}

.product-info h3 {
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.product-info p {
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
}

/* ---- 新闻列表 ---- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

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

.news-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
}

.news-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-body {
  padding: 1.5rem;
}

.news-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.news-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.news-card h3 a {
  color: var(--text-primary);
}

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

.news-card p {
  font-size: 0.9rem;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.faq-item {
  border-bottom: 1px solid var(--border-color);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: var(--transition);
}

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

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: rgba(98, 126, 234, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 0.75rem;
}

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

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

.faq-answer p {
  padding-bottom: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---- CTA区域 ---- */
.cta {
  background:
    radial-gradient(ellipse at center, rgba(98, 126, 234, 0.2) 0%, transparent 70%),
    var(--bg-section);
  text-align: center;
}

.cta h2 {
  margin-bottom: 1rem;
}

.cta p {
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---- 页脚 ---- */
.site-footer {
  background: #080C18;
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  margin: 1rem 0;
  font-size: 0.9rem;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

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

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

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.75rem;
}

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

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---- 内部页面 Hero ---- */
.page-hero {
  padding: 160px 0 80px;
  text-align: center;
  background:
    radial-gradient(ellipse at 50% 30%, rgba(98, 126, 234, 0.15) 0%, transparent 60%),
    var(--gradient-bg);
  position: relative;
}

.page-hero h1 {
  margin-bottom: 1rem;
}

.page-hero p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

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

.article-header {
  margin-bottom: 2.5rem;
}

.article-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.article-cover {
  border-radius: var(--radius-lg);
  margin-bottom: 2rem;
  width: 100%;
}

.article-body h2 {
  margin: 2rem 0 1rem;
  font-size: 1.4rem;
}

.article-body p {
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 1.25rem;
}

.article-body ul,
.article-body ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.article-body li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

/* ---- 联系我们 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info-item {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  transition: var(--transition);
}

.contact-info-item:hover {
  border-color: var(--primary);
  transform: translateX(5px);
}

.contact-info-item .icon {
  width: 48px;
  height: 48px;
  background: rgba(98, 126, 234, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.9rem 1rem;
  background: var(--bg-dark);
  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-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(98, 126, 234, 0.15);
}

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

/* ---- 动画 ---- */
@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 fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .features-grid,
  .products-grid,
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-dark);
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

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

  .mobile-toggle {
    display: flex;
  }

  .hero-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-float-card.card-1 {
    left: 5%;
  }

  .hero-float-card.card-2 {
    right: 5%;
  }

  section {
    padding: 4rem 0;
  }

  .features-grid,
  .products-grid,
  .news-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

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

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }
}