/* ========== im冷钱包 全站样式表 ========== */
/* 深空蓝到极光紫渐变色系 + 磨砂玻璃效果 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

/* ===== CSS Variables ===== */
:root {
  --deep-space: #0a0e27;
  --space-blue: #0d1137;
  --aurora-purple: #6c3ce0;
  --aurora-blue: #3b82f6;
  --aurora-cyan: #06b6d4;
  --aurora-pink: #a855f7;
  --neon-green: #22c55e;
  --neon-orange: #f59e0b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --glass-bg: rgba(15, 23, 42, 0.6);
  --glass-border: rgba(148, 163, 184, 0.15);
  --glass-hover: rgba(148, 163, 184, 0.25);
  --card-bg: rgba(15, 23, 42, 0.7);
  --gradient-primary: linear-gradient(135deg, #6c3ce0 0%, #3b82f6 50%, #06b6d4 100%);
  --gradient-dark: linear-gradient(180deg, #0a0e27 0%, #0d1137 50%, #1a1145 100%);
  --gradient-card: linear-gradient(135deg, rgba(108,60,224,0.1) 0%, rgba(59,130,246,0.1) 100%);
  --shadow-glow: 0 0 30px rgba(108, 60, 224, 0.3);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-main: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--gradient-dark);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--aurora-cyan); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--aurora-purple); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ===== 粒子背景 ===== */
.particle-bg {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: -1; overflow: hidden;
  background: var(--gradient-dark);
}
.particle-bg::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    radial-gradient(2px 2px at 20px 30px, rgba(108,60,224,0.4), transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(59,130,246,0.3), transparent),
    radial-gradient(2px 2px at 50px 160px, rgba(6,182,212,0.3), transparent),
    radial-gradient(2px 2px at 90px 40px, rgba(168,85,247,0.4), transparent),
    radial-gradient(2px 2px at 130px 80px, rgba(108,60,224,0.3), transparent),
    radial-gradient(2px 2px at 160px 120px, rgba(59,130,246,0.4), transparent);
  background-size: 200px 200px;
  animation: particleFloat 20s linear infinite;
}
.particle-bg::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background:
    linear-gradient(90deg, transparent 49.5%, rgba(108,60,224,0.03) 49.5%, rgba(108,60,224,0.03) 50.5%, transparent 50.5%),
    linear-gradient(0deg, transparent 49.5%, rgba(59,130,246,0.03) 49.5%, rgba(59,130,246,0.03) 50.5%, transparent 50.5%);
  background-size: 60px 60px;
}
@keyframes particleFloat {
  0% { transform: translateY(0); }
  100% { transform: translateY(-200px); }
}

/* ===== 容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 20px; }

/* ===== 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-lg);
  padding: 28px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.glass-card:hover {
  border-color: var(--glass-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

/* ===== 头部导航 ===== */
.site-header {
  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);
  transition: all 0.3s;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1400px; margin: 0 auto; padding: 0 24px; height: 72px;
}
.brand-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.brand-logo img { height: 36px; width: auto; }
.brand-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 900;
  -webkit-text-fill-color: #fff;
}
.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-menu a {
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.3s;
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--text-primary);
  background: rgba(108, 60, 224, 0.15);
}
.nav-download-btn {
  background: var(--gradient-primary) !important;
  color: #fff !important;
  padding: 10px 22px !important;
  border-radius: 50px !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 15px rgba(108, 60, 224, 0.4);
}
.nav-download-btn:hover { transform: scale(1.05); box-shadow: 0 6px 20px rgba(108, 60, 224, 0.6); }

/* 移动端菜单 */
.mobile-menu-btn {
  display: none; background: none; border: none;
  color: var(--text-primary); font-size: 1.5rem; cursor: pointer;
  padding: 8px;
}
.mobile-menu-btn span {
  display: block; width: 24px; height: 2px;
  background: var(--text-primary); margin: 5px 0;
  transition: all 0.3s;
}

/* ===== 搜索框 ===== */
.search-bar {
  background: rgba(10, 14, 39, 0.7);
  border-bottom: 1px solid var(--glass-border);
  padding: 12px 0;
  margin-top: 72px;
}
.search-wrapper {
  max-width: 680px; margin: 0 auto; position: relative;
  display: flex; align-items: center;
}
.search-wrapper input {
  width: 100%; padding: 12px 48px 12px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px; color: var(--text-primary);
  font-size: 0.95rem; outline: none;
  transition: border-color 0.3s;
}
.search-wrapper input:focus { border-color: var(--aurora-purple); }
.search-wrapper input::placeholder { color: var(--text-muted); }
.search-wrapper .search-icon {
  position: absolute; right: 16px;
  color: var(--aurora-cyan); font-size: 1.1rem; cursor: pointer;
}
.search-overlay {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(10, 14, 39, 0.9); z-index: 2000;
  justify-content: center; align-items: center;
  flex-direction: column;
}
.search-overlay.active { display: flex; }
.search-overlay .search-status {
  color: var(--aurora-cyan); font-size: 1.2rem;
  margin-top: 20px;
}
.search-overlay .spinner {
  width: 50px; height: 50px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--aurora-purple);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb span { margin: 0 8px; }

/* ===== Hero 区域 ===== */
.hero-section {
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero-section::before {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(108,60,224,0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 50%, rgba(59,130,246,0.1) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}
@keyframes heroGlow {
  0% { transform: rotate(0deg) scale(1); }
  100% { transform: rotate(5deg) scale(1.1); }
}
.hero-content {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
  position: relative; z-index: 1;
}
.hero-text h1 {
  font-size: 3rem; font-weight: 900;
  line-height: 1.2; margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #c4b5fd 50%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-text .hero-subtitle {
  font-size: 1.15rem; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 32px;
}
.hero-text .hero-tags {
  display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px;
}
.hero-text .hero-tags span {
  padding: 6px 16px;
  background: rgba(108, 60, 224, 0.15);
  border: 1px solid rgba(108, 60, 224, 0.3);
  border-radius: 50px;
  font-size: 0.82rem;
  color: var(--aurora-purple);
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-primary);
  color: #fff; font-weight: 600; font-size: 1rem;
  border-radius: 50px; border: none; cursor: pointer;
  box-shadow: 0 4px 20px rgba(108, 60, 224, 0.4);
  transition: all 0.3s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(108, 60, 224, 0.6); color: #fff; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-primary); font-weight: 600; font-size: 1rem;
  border-radius: 50px;
  border: 1px solid var(--glass-border);
  cursor: pointer; transition: all 0.3s;
}
.btn-secondary:hover { border-color: var(--aurora-purple); background: rgba(108, 60, 224, 0.1); color: #fff; }
.hero-image {
  display: flex; justify-content: center; align-items: center;
  position: relative;
}
.hero-image img {
  max-width: 420px; border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glow);
}
.hero-image::after {
  content: '';
  position: absolute; top: -20px; right: -20px; bottom: -20px; left: -20px;
  border: 1px solid rgba(108, 60, 224, 0.2);
  border-radius: var(--radius-xl);
  animation: pulseRing 3s ease-in-out infinite;
}
@keyframes pulseRing {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.02); }
}

/* ===== 统计数据条 ===== */
.stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px; margin: 40px 0;
}
.stat-item {
  text-align: center; padding: 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
}
.stat-number {
  font-size: 2rem; font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ===== 仪表盘 ===== */
.dashboard-section { padding: 60px 0; }
.dashboard-grid {
  display: grid; grid-template-columns: 2fr 1fr;
  gap: 24px;
}
.dashboard-main {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.dashboard-title {
  font-size: 1.1rem; font-weight: 700; margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}
.dashboard-title .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--neon-green);
  animation: blink 2s infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.price-display {
  display: flex; align-items: baseline; gap: 12px;
  margin-bottom: 16px;
}
.price-display .price {
  font-size: 2.5rem; font-weight: 900;
  color: var(--text-primary);
}
.price-display .change {
  font-size: 1rem; font-weight: 600;
  padding: 4px 12px;
  border-radius: 50px;
}
.price-display .change.up { color: var(--neon-green); background: rgba(34, 197, 94, 0.15); }
.price-display .change.down { color: #ef4444; background: rgba(239, 68, 68, 0.15); }
.chart-area {
  height: 200px; position: relative;
  background: linear-gradient(180deg, rgba(108,60,224,0.05) 0%, transparent 100%);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.chart-line {
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 100%;
}
.chart-line svg { width: 100%; height: 100%; }
.dashboard-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px; flex: 1;
}
.risk-counter {
  font-size: 2.8rem; font-weight: 900;
  background: linear-gradient(135deg, var(--neon-green), var(--aurora-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: countPulse 2s ease-in-out infinite;
}
@keyframes countPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* ===== 区块标题 ===== */
.section-header {
  text-align: center; margin-bottom: 48px;
}
.section-header h2 {
  font-size: 2.2rem; font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 0%, #c4b5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-header h3, .section-header h4, .section-header h5, .section-header h6 {
  font-weight: 700; margin-bottom: 8px;
}
.section-header p {
  color: var(--text-secondary); font-size: 1.05rem;
  max-width: 640px; margin: 0 auto;
}
.section-divider {
  width: 60px; height: 3px;
  background: var(--gradient-primary);
  margin: 16px auto;
  border-radius: 2px;
}

/* ===== 内容网格 ===== */
.content-grid {
  display: grid; gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ===== 新闻/文章卡片 ===== */
.article-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s;
}
.article-card:hover {
  border-color: var(--aurora-purple);
  box-shadow: var(--shadow-glow);
  transform: translateY(-6px);
}
.article-card .card-image {
  position: relative; overflow: hidden;
  height: 200px;
}
.article-card .card-image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s;
}
.article-card:hover .card-image img { transform: scale(1.08); }
.article-card .card-tag {
  position: absolute; top: 12px; left: 12px;
  padding: 4px 12px;
  background: rgba(108, 60, 224, 0.8);
  backdrop-filter: blur(4px);
  border-radius: 50px;
  font-size: 0.75rem; font-weight: 600;
  color: #fff;
}
.article-card .card-body { padding: 20px; }
.article-card .card-body h4, .article-card .card-body h5, .article-card .card-body h6 {
  font-size: 1.05rem; font-weight: 700;
  margin-bottom: 10px; line-height: 1.5;
  color: var(--text-primary);
}
.article-card .card-body p {
  font-size: 0.88rem; color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 3;
  -webkit-box-orient: vertical; overflow: hidden;
}
.article-card .card-meta {
  display: flex; justify-content: space-between;
  padding: 12px 20px;
  border-top: 1px solid var(--glass-border);
  font-size: 0.8rem; color: var(--text-muted);
}

/* ===== 视频卡片 ===== */
.video-card {
  position: relative; overflow: hidden;
  border-radius: var(--radius-lg);
  cursor: pointer;
}
.video-card .video-thumb {
  width: 100%; height: 220px; object-fit: cover;
  transition: transform 0.5s;
}
.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: 64px; height: 64px;
  background: rgba(108, 60, 224, 0.85);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.4s;
}
.video-card:hover .play-btn { transform: translate(-50%, -50%) scale(1); }
.video-card .play-btn::after {
  content: '';
  width: 0; height: 0;
  border-left: 18px solid #fff;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  margin-left: 4px;
}
.video-card .video-overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 16px;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: #fff;
}
.video-card .video-overlay h5 { font-size: 0.95rem; margin-bottom: 4px; }
.video-card .video-overlay span { font-size: 0.8rem; opacity: 0.7; }

/* ===== AI 赋能区 ===== */
.ai-section { padding: 80px 0; }
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ai-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
}
.ai-card::before {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(108,60,224,0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
}
.ai-card:hover::before { opacity: 1; }
.ai-card:hover { border-color: var(--aurora-purple); transform: translateY(-6px); }
.ai-icon {
  width: 72px; height: 72px; margin: 0 auto 20px;
  background: var(--gradient-primary);
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
  position: relative;
}
.ai-icon::after {
  content: '';
  position: absolute; inset: -4px;
  border: 1px solid rgba(108, 60, 224, 0.3);
  border-radius: 24px;
  animation: pulseRing 3s ease-in-out infinite;
}

/* ===== 专家展示 ===== */
.expert-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex; gap: 16px; align-items: flex-start;
  transition: all 0.3s;
}
.expert-card:hover { border-color: var(--aurora-purple); }
.expert-avatar {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--gradient-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; font-weight: 700;
  flex-shrink: 0;
}
.expert-info h5 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.expert-info .expert-title { font-size: 0.82rem; color: var(--aurora-cyan); margin-bottom: 8px; }
.expert-info p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

/* ===== 用户评价 ===== */
.review-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.review-stars { color: var(--neon-orange); margin-bottom: 12px; font-size: 1rem; letter-spacing: 2px; }
.review-text { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-author .avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 600;
}
.review-author .name { font-size: 0.88rem; font-weight: 600; }
.review-author .date { font-size: 0.78rem; color: var(--text-muted); }

/* ===== 分享按钮 ===== */
.share-bar {
  display: flex; gap: 12px; flex-wrap: wrap;
  padding: 20px 0;
}
.share-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.3s;
}
.share-btn:hover {
  border-color: var(--aurora-purple);
  color: var(--text-primary);
  background: rgba(108, 60, 224, 0.15);
}

/* ===== 三层加密动效 ===== */
.encryption-layers {
  display: flex; justify-content: center; align-items: center;
  padding: 60px 0; position: relative;
}
.layer-ring {
  position: absolute; border-radius: 50%;
  border: 2px solid transparent;
  display: flex; align-items: center; justify-content: center;
}
.layer-ring.outer {
  width: 320px; height: 320px;
  border-color: rgba(108, 60, 224, 0.3);
  animation: rotateLayer 20s linear infinite;
}
.layer-ring.middle {
  width: 220px; height: 220px;
  border-color: rgba(59, 130, 246, 0.4);
  animation: rotateLayer 15s linear infinite reverse;
}
.layer-ring.inner {
  width: 120px; height: 120px;
  border-color: rgba(6, 182, 212, 0.5);
  animation: rotateLayer 10s linear infinite;
}
.layer-ring .node {
  position: absolute; width: 12px; height: 12px;
  border-radius: 50%;
  box-shadow: 0 0 10px currentColor;
}
.layer-ring.outer .node { background: var(--aurora-purple); color: var(--aurora-purple); top: -6px; left: 50%; }
.layer-ring.middle .node { background: var(--aurora-blue); color: var(--aurora-blue); bottom: -6px; right: 20%; }
.layer-ring.inner .node { background: var(--aurora-cyan); color: var(--aurora-cyan); top: 50%; right: -6px; }
@keyframes rotateLayer { to { transform: rotate(360deg); } }
.core-shield {
  width: 60px; height: 60px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 0 40px rgba(108, 60, 224, 0.5);
  z-index: 1;
}

/* ===== 交互式步骤条 ===== */
.step-bar {
  display: flex; justify-content: center; gap: 0;
  margin: 40px 0 30px;
  position: relative;
}
.step-bar::before {
  content: '';
  position: absolute; top: 20px; left: 15%; right: 15%;
  height: 2px;
  background: var(--glass-border);
}
.step-item {
  display: flex; flex-direction: column; align-items: center;
  cursor: pointer; position: relative; z-index: 1;
  padding: 0 24px;
}
.step-item .step-num {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem;
  transition: all 0.3s;
  margin-bottom: 8px;
}
.step-item.active .step-num {
  background: var(--gradient-primary);
  border-color: var(--aurora-purple);
  box-shadow: 0 0 20px rgba(108, 60, 224, 0.5);
}
.step-item .step-label {
  font-size: 0.82rem; color: var(--text-muted);
  transition: color 0.3s;
}
.step-item.active .step-label { color: var(--text-primary); }
.step-content {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  min-height: 200px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: rgba(5, 7, 18, 0.9);
  border-top: 1px solid var(--glass-border);
  padding: 60px 0 0;
  margin-top: 80px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 40px;
}
.footer-brand .brand-name {
  font-size: 1.3rem; font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-brand p {
  color: var(--text-muted); font-size: 0.88rem;
  line-height: 1.7; margin-bottom: 16px;
}
.footer-col h5 {
  font-size: 0.95rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 16px;
}
.footer-col a {
  display: block; color: var(--text-muted);
  font-size: 0.88rem; padding: 5px 0;
  transition: color 0.3s;
}
.footer-col a:hover { color: var(--aurora-cyan); }
.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding: 20px 0;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  font-size: 0.82rem; color: var(--text-muted);
}

/* ===== 内页通用 ===== */
.page-hero {
  padding: 120px 0 60px;
  text-align: center;
  position: relative;
}
.page-hero h1 {
  font-size: 2.5rem; font-weight: 900;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #c4b5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-hero p {
  font-size: 1.1rem; color: var(--text-secondary);
  max-width: 600px; margin: 0 auto;
}
.page-content {
  padding: 40px 0 80px;
}
.content-article {
  max-width: 860px; margin: 0 auto;
  font-size: 1rem; line-height: 1.8;
  color: var(--text-secondary);
}
.content-article h2, .content-article h3, .content-article h4 {
  color: var(--text-primary); margin: 32px 0 16px;
}
.content-article h2 { font-size: 1.6rem; }
.content-article h3 { font-size: 1.3rem; }
.content-article h4 { font-size: 1.1rem; }
.content-article p { margin-bottom: 16px; }
.content-article img {
  border-radius: var(--radius-md);
  margin: 24px 0;
  box-shadow: var(--shadow-card);
}

/* ===== JSON 数据展示 ===== */
.json-block {
  background: rgba(10, 14, 39, 0.8);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 20px;
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  color: var(--aurora-cyan);
  overflow-x: auto;
  line-height: 1.6;
}
.json-block .key { color: var(--aurora-purple); }
.json-block .string { color: var(--neon-green); }
.json-block .number { color: var(--neon-orange); }

/* ===== 科技图标 (纯CSS) ===== */
.css-icon { display: inline-flex; align-items: center; justify-content: center; }
.icon-shield {
  width: 24px; height: 28px;
  background: var(--gradient-primary);
  clip-path: polygon(50% 0%, 100% 15%, 100% 65%, 50% 100%, 0% 65%, 0% 15%);
}
.icon-lock {
  width: 20px; height: 24px; position: relative;
}
.icon-lock::before {
  content: '';
  position: absolute; top: 0; left: 3px;
  width: 14px; height: 10px;
  border: 2px solid var(--aurora-cyan);
  border-bottom: none;
  border-radius: 7px 7px 0 0;
}
.icon-lock::after {
  content: '';
  position: absolute; bottom: 0; left: 0;
  width: 20px; height: 14px;
  background: var(--aurora-cyan);
  border-radius: 3px;
}
.icon-chain {
  width: 24px; height: 24px; position: relative;
}
.icon-chain::before, .icon-chain::after {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  border: 2px solid var(--aurora-purple);
  border-radius: 50%;
}
.icon-chain::before { top: 0; left: 0; }
.icon-chain::after { bottom: 0; right: 0; }

/* ===== 懒加载 ===== */
.lazy-img {
  opacity: 0; transition: opacity 0.5s;
}
.lazy-img.loaded { opacity: 1; }

/* ===== 响应式布局 ===== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-image { order: -1; }
  .hero-image img { max-width: 300px; }
  .hero-buttons { justify-content: center; }
  .hero-text .hero-tags { justify-content: center; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  html { font-size: 15px; }
  .nav-menu { display: none; }
  .nav-menu.active {
    display: flex; flex-direction: column;
    position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(20px);
    padding: 20px;
    border-bottom: 1px solid var(--glass-border);
  }
  .mobile-menu-btn { display: block; }
  .hero-section { padding: 120px 0 60px; }
  .hero-text h1 { font-size: 2rem; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-number { font-size: 1.5rem; }
  .ai-grid { grid-template-columns: 1fr; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .page-hero h1 { font-size: 1.8rem; }
  .encryption-layers { transform: scale(0.7); }
  .step-bar { flex-wrap: wrap; gap: 12px; }
  .step-bar::before { display: none; }
}

@media (max-width: 480px) {
  .hero-text h1 { font-size: 1.6rem; }
  .hero-buttons { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .glass-card { padding: 20px; }
  .section-header h2 { font-size: 1.6rem; }
  .price-display .price { font-size: 1.8rem; }
}

/* ===== 动画辅助 ===== */
.fade-in {
  opacity: 0; transform: translateY(20px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }
.slide-in-left {
  opacity: 0; transform: translateX(-30px);
  transition: all 0.6s;
}
.slide-in-left.visible { opacity: 1; transform: translateX(0); }
.slide-in-right {
  opacity: 0; transform: translateX(30px);
  transition: all 0.6s;
}
.slide-in-right.visible { opacity: 1; transform: translateX(0); }