/* ===== USDT冷钱包 - 全局样式 ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --deep-space: #0a0e27;
  --aurora-purple: #6c3ce0;
  --aurora-blue: #1a73e8;
  --neon-cyan: #00e5ff;
  --neon-green: #00ff88;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --text-primary: #e8eaf6;
  --text-secondary: #9fa8da;
  --text-muted: #7986cb;
  --gradient-main: linear-gradient(135deg, #0a0e27 0%, #1a1040 40%, #2d1b69 70%, #1a237e 100%);
  --gradient-card: linear-gradient(135deg, rgba(108,60,224,0.15), rgba(26,115,232,0.1));
  --gradient-accent: linear-gradient(90deg, #6c3ce0, #1a73e8, #00e5ff);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-glow: 0 0 30px rgba(108,60,224,0.3);
}

* { margin:0; padding:0; box-sizing:border-box; }

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

body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--gradient-main);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* 背景网格 */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-image:
    linear-gradient(rgba(108,60,224,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108,60,224,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* 粒子效果层 */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background:
    radial-gradient(2px 2px at 20% 30%, rgba(0,229,255,0.4), transparent),
    radial-gradient(2px 2px at 40% 70%, rgba(108,60,224,0.3), transparent),
    radial-gradient(1px 1px at 60% 20%, rgba(0,255,136,0.3), transparent),
    radial-gradient(2px 2px at 80% 50%, rgba(26,115,232,0.4), transparent),
    radial-gradient(1px 1px at 10% 80%, rgba(0,229,255,0.2), transparent),
    radial-gradient(1px 1px at 90% 10%, rgba(108,60,224,0.2), transparent);
  pointer-events: none;
  z-index: 0;
  animation: particleFloat 20s ease-in-out infinite;
}

@keyframes particleFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10,14,39,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 20px;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(10,14,39,0.95);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.3rem;
}

.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--neon-cyan);
  background: rgba(0,229,255,0.08);
}

.nav-search {
  position: relative;
}

.nav-search input {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 25px;
  padding: 8px 16px 8px 36px;
  color: var(--text-primary);
  font-size: 0.85rem;
  width: 200px;
  outline: none;
  transition: all 0.3s ease;
}

.nav-search input:focus {
  border-color: var(--aurora-purple);
  width: 260px;
  box-shadow: 0 0 15px rgba(108,60,224,0.2);
}

.nav-search .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.search-result-tip {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 8px;
  background: rgba(10,14,39,0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  color: var(--neon-cyan);
  font-size: 0.85rem;
  animation: pulse 1.5s infinite;
}

.search-result-tip.active { display: block; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* 移动端汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
  z-index: 1001;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 90px 0 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

.breadcrumb a:hover { color: var(--neon-cyan); }
.breadcrumb span { margin: 0 8px; }

/* ===== Hero区域 ===== */
.hero {
  padding: 140px 0 80px;
  text-align: center;
  position: relative;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h2 {
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-accent);
  color: #fff;
  border: none;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(108,60,224,0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108,60,224,0.6);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--neon-cyan);
  transform: translateY(-2px);
}

/* ===== 磨砂玻璃卡片 ===== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 30px;
  transition: all 0.3s ease;
}

.glass-card:hover {
  border-color: rgba(108,60,224,0.3);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

/* ===== 区块标题 ===== */
.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* ===== 仪表盘 ===== */
.dashboard {
  padding: 60px 0;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  text-align: center;
  padding: 24px 16px;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

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

.stat-card .stat-change {
  font-size: 0.8rem;
  margin-top: 6px;
  color: var(--neon-green);
}

.stat-card .stat-change.down { color: #ff5252; }

/* 仪表盘动画 */
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.stat-card { animation: countUp 0.6s ease-out forwards; }
.stat-card:nth-child(2) { animation-delay: 0.1s; }
.stat-card:nth-child(3) { animation-delay: 0.2s; }
.stat-card:nth-child(4) { animation-delay: 0.3s; }

/* ===== 新闻/文章卡片 ===== */
.news-section, .community-section, .expert-section, .review-section {
  padding: 60px 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-card {
  overflow: hidden;
  cursor: pointer;
}

.article-card .card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  transition: transform 0.4s ease;
}

.article-card:hover .card-img {
  transform: scale(1.05);
}

.article-card .card-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(108,60,224,0.2);
  color: var(--aurora-purple);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.article-card h5 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.5;
}

.article-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.article-card .card-meta {
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

/* ===== Video卡片 ===== */
.video-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.video-card .video-thumb {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  transition: transform 0.4s ease;
}

.video-card:hover .video-thumb {
  transform: scale(1.05);
}

.video-card .play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 60px;
  height: 60px;
  background: rgba(108,60,224,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.video-card:hover .play-btn {
  transform: translate(-50%, -50%) scale(1);
}

.play-btn::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}

.video-card .video-info {
  padding: 16px 0 0;
}

.video-card h5 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.video-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== 专家卡片 ===== */
.expert-card {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.expert-card .expert-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-accent);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.expert-card .expert-info h5 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.expert-card .expert-info .expert-title {
  font-size: 0.8rem;
  color: var(--neon-cyan);
  margin-bottom: 10px;
}

.expert-card .expert-info p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 用户评价 ===== */
.review-card {
  position: relative;
}

.review-card .stars {
  color: #ffc107;
  margin-bottom: 12px;
  font-size: 0.9rem;
  letter-spacing: 2px;
}

.review-card blockquote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  font-style: italic;
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 3px solid var(--aurora-purple);
}

.review-card .reviewer {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-card .reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.review-card .reviewer-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.review-card .reviewer-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===== 互动分享 ===== */
.share-section {
  padding: 60px 0;
}

.share-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 25px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  text-decoration: none;
}

.share-btn:hover {
  transform: translateY(-2px);
  border-color: var(--neon-cyan);
}

/* ===== 步骤条 (guide页面) ===== */
.steps-container {
  max-width: 800px;
  margin: 0 auto;
}

.step-item {
  margin-bottom: 16px;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.step-header:hover {
  border-color: var(--aurora-purple);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.step-header h5 {
  font-size: 1.05rem;
  font-weight: 600;
  flex: 1;
}

.step-arrow {
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.step-item.active .step-arrow {
  transform: rotate(180deg);
}

.step-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 24px;
}

.step-item.active .step-content {
  max-height: 500px;
  padding: 0 24px 24px;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
  padding-top: 12px;
  border-top: 1px solid var(--glass-border);
}

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 60px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h4 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-col h6 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.3s;
}

.footer-col ul li a:hover {
  color: var(--neon-cyan);
}

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-bottom .update-time {
  color: var(--neon-cyan);
}

/* ===== 内页内容区 ===== */
.page-content {
  padding: 100px 0 60px;
}

.page-content h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 24px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-content h4 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 30px 0 16px;
  color: var(--text-primary);
}

.page-content h5 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text-primary);
}

.page-content h6 {
  font-size: 1rem;
  font-weight: 600;
  margin: 20px 0 10px;
  color: var(--text-secondary);
}

.page-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-content .content-img {
  width: 100%;
  max-width: 720px;
  border-radius: var(--radius);
  margin: 24px 0;
  border: 1px solid var(--glass-border);
}

.page-content ul, .page-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.page-content li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

/* ===== 论坛帖子 ===== */
.forum-post {
  margin-bottom: 20px;
}

.forum-post .post-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.forum-post .post-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.forum-post .author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
}

.forum-post .post-tag {
  padding: 4px 10px;
  background: rgba(0,229,255,0.1);
  color: var(--neon-cyan);
  border-radius: 12px;
  font-size: 0.75rem;
}

.forum-post h5 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.forum-post p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.forum-post .post-stats {
  margin-top: 12px;
  display: flex;
  gap: 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== 懒加载 ===== */
.lazy-img {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.lazy-img.loaded {
  opacity: 1;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  html { font-size: 15px; }

  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: fixed;
    top: 70px;
    left: 0; right: 0;
    background: rgba(10,14,39,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid var(--glass-border);
  }

  .nav-links.active { display: flex; }

  .nav-search {
    display: none;
  }

  .hero { padding: 110px 0 50px; }
  .hero h1 { font-size: 2rem; }
  .hero h2 { font-size: 1.05rem; }

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

  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .expert-card { flex-direction: column; align-items: center; text-align: center; }

  .glass-card { padding: 20px; }

  .page-content { padding: 80px 0 40px; }
  .page-content h2 { font-size: 1.6rem; }

  .stat-card .stat-value { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
  .hero h1 { font-size: 1.7rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .dashboard-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 16px 10px; }
  .stat-card .stat-value { font-size: 1.3rem; }
  .share-buttons { flex-direction: column; }
  .share-btn { justify-content: center; }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--deep-space); }
::-webkit-scrollbar-thumb { background: var(--aurora-purple); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--aurora-blue); }

/* ===== 选中文本 ===== */
::selection {
  background: rgba(108,60,224,0.4);
  color: #fff;
}