/* ============================================
   Trust冷钱包 - 全站共享样式表
   深空蓝 → 极光紫 科技渐变主题
   ============================================ */

/* === 基础重置与字体 === */
@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');

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

:root {
  --deep-space: #0a0e27;
  --space-blue: #0d1440;
  --aurora-purple: #6c3ce0;
  --aurora-light: #a855f7;
  --neon-blue: #3b82f6;
  --neon-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-gold: #f59e0b;
  --danger-red: #ef4444;
  --glass-bg: rgba(13, 20, 64, 0.6);
  --glass-border: rgba(108, 60, 224, 0.3);
  --glass-hover: rgba(108, 60, 224, 0.15);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --card-radius: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--deep-space);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

/* === 粒子背景 + 网格线 === */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  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;
}

.bg-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(108, 60, 224, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(6, 182, 212, 0.05) 0%, transparent 70%);
}

/* === 粒子动画 === */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--aurora-purple);
  border-radius: 50%;
  opacity: 0.4;
  animation: float-particle linear infinite;
}

.particle:nth-child(1) { left: 10%; top: 20%; animation-duration: 20s; animation-delay: 0s; }
.particle:nth-child(2) { left: 30%; top: 60%; animation-duration: 25s; animation-delay: -5s; }
.particle:nth-child(3) { left: 50%; top: 40%; animation-duration: 18s; animation-delay: -3s; }
.particle:nth-child(4) { left: 70%; top: 80%; animation-duration: 22s; animation-delay: -8s; }
.particle:nth-child(5) { left: 90%; top: 10%; animation-duration: 30s; animation-delay: -2s; }
.particle:nth-child(6) { left: 15%; top: 70%; animation-duration: 24s; animation-delay: -6s; }
.particle:nth-child(7) { left: 85%; top: 50%; animation-duration: 28s; animation-delay: -10s; }
.particle:nth-child(8) { left: 45%; top: 90%; animation-duration: 19s; animation-delay: -4s; }

@keyframes float-particle {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { transform: translateY(-100vh) translateX(50px); opacity: 0; }
}

/* === 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(--card-radius);
  transition: var(--transition);
}

.glass-card:hover {
  border-color: var(--aurora-light);
  box-shadow: 0 8px 32px rgba(108, 60, 224, 0.2);
  transform: translateY(-2px);
}

/* === 头部导航 === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  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);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.3rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--aurora-purple), var(--neon-blue));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #fff;
  font-weight: 900;
}

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

.nav-menu a {
  display: block;
  padding: 8px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 8px;
  transition: var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

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

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--aurora-purple), var(--neon-blue));
  color: #fff;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-download:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(108, 60, 224, 0.4);
}

/* === 搜索框 === */
.search-bar {
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  justify-content: center;
}

.search-wrapper {
  position: relative;
  width: 100%;
  max-width: 600px;
}

.search-wrapper input {
  width: 100%;
  padding: 12px 20px 12px 44px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.search-wrapper input:focus {
  border-color: var(--aurora-purple);
  box-shadow: 0 0 20px rgba(108, 60, 224, 0.2);
}

.search-wrapper .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

.search-result {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  margin-top: 8px;
  padding: 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--neon-cyan);
  font-size: 0.85rem;
  z-index: 100;
}

/* === Hero 区域 === */
.hero {
  padding: 140px 24px 80px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, var(--aurora-light) 50%, var(--neon-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.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: linear-gradient(135deg, var(--aurora-purple), var(--neon-blue));
  color: #fff;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108, 60, 224, 0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  cursor: pointer;
}

.btn-secondary:hover {
  border-color: var(--aurora-light);
  background: var(--glass-hover);
}

/* === 面包屑 === */
.breadcrumb {
  max-width: 1400px;
  margin: 0 auto;
  padding: 100px 24px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--aurora-light);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* === 内容区域 === */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff, var(--aurora-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* === 仪表盘 === */
.dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

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

.dash-card .dash-value {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-green), var(--neon-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.dash-card .dash-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.dash-card .dash-change {
  font-size: 0.8rem;
  font-weight: 600;
}

.dash-change.up { color: var(--accent-green); }
.dash-change.down { color: var(--danger-red); }

/* 数字跳动动画 */
@keyframes pulse-number {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.dash-value.animate {
  animation: pulse-number 2s ease-in-out infinite;
}

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

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

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

/* === 文章/新闻卡片 === */
.article-card {
  padding: 0;
  overflow: hidden;
}

.article-card .card-image {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.article-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.article-card .card-body {
  padding: 20px;
}

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

.article-card h3,
.article-card h4,
.article-card h5 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.5;
}

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

.article-card .card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(108, 60, 224, 0.15);
  font-size: 0.78rem;
  color: var(--text-muted);
}

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

.video-card .video-thumb {
  position: relative;
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--space-blue), var(--aurora-purple));
  overflow: hidden;
}

.video-card .video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
  transition: var(--transition);
}

.video-card:hover .video-thumb img {
  opacity: 0.5;
  transform: scale(1.05);
}

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 60px;
  height: 60px;
  background: rgba(108, 60, 224, 0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

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

.video-play-btn::after {
  content: '';
  display: block;
  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-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  padding: 2px 8px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 4px;
  font-size: 0.75rem;
  color: #fff;
}

.video-card .card-body {
  padding: 16px 20px;
}

.video-card h5 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.video-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* === 专家/用户卡片 === */
.expert-card {
  padding: 24px;
  text-align: center;
}

.expert-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--aurora-purple), var(--neon-blue));
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
}

.expert-card h5 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.expert-card .expert-title {
  font-size: 0.82rem;
  color: var(--aurora-light);
  margin-bottom: 12px;
}

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

/* === 用户评价 === */
.review-card {
  padding: 24px;
}

.review-stars {
  color: var(--accent-gold);
  font-size: 0.9rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-card blockquote {
  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: linear-gradient(135deg, var(--neon-cyan), var(--aurora-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.review-author-info .name {
  font-weight: 600;
  font-size: 0.88rem;
}

.review-author-info .date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* === 社交分享 === */
.share-section {
  text-align: center;
  padding: 40px 0;
}

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

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  color: #fff;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.share-btn.wechat { background: #07c160; }
.share-btn.weibo { background: #e6162d; }
.share-btn.douyin { background: #161823; border: 1px solid #333; }
.share-btn.bilibili { background: #fb7299; }

/* === 步骤条 === */
.steps-container {
  max-width: 900px;
  margin: 0 auto;
}

.steps-nav {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 32px;
  position: relative;
}

.step-btn {
  padding: 12px 24px;
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.step-btn:first-child { border-radius: 10px 0 0 10px; }
.step-btn:last-child { border-radius: 0 10px 10px 0; }

.step-btn.active {
  background: linear-gradient(135deg, var(--aurora-purple), var(--neon-blue));
  border-color: var(--aurora-purple);
  color: #fff;
}

.step-content {
  display: none;
  padding: 32px;
  animation: fadeIn 0.4s ease;
}

.step-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === SVG 动效区域 === */
.encryption-visual {
  max-width: 800px;
  margin: 40px auto;
  padding: 40px;
  text-align: center;
}

.encryption-layers {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.layer-box {
  width: 180px;
  padding: 24px;
  text-align: center;
  position: relative;
}

.layer-box .layer-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 12px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.layer-box:nth-child(1) .layer-icon { background: rgba(16, 185, 129, 0.2); color: var(--accent-green); }
.layer-box:nth-child(2) .layer-icon { background: rgba(108, 60, 224, 0.2); color: var(--aurora-light); }
.layer-box:nth-child(3) .layer-icon { background: rgba(59, 130, 246, 0.2); color: var(--neon-blue); }

.layer-arrow {
  font-size: 1.5rem;
  color: var(--aurora-light);
  animation: arrowPulse 1.5s ease-in-out infinite;
}

@keyframes arrowPulse {
  0%, 100% { opacity: 0.4; transform: translateX(0); }
  50% { opacity: 1; transform: translateX(5px); }
}

.layer-box h5 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.layer-box p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* === 内容文章区 === */
.content-article {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 0;
}

.content-article h2,
.content-article h3,
.content-article h4 {
  margin: 32px 0 16px;
  font-weight: 700;
}

.content-article h2 { font-size: 1.6rem; }
.content-article h3 { font-size: 1.3rem; }
.content-article h4 { font-size: 1.1rem; color: var(--aurora-light); }

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

.content-article ul,
.content-article ol {
  margin: 16px 0;
  padding-left: 24px;
  color: var(--text-secondary);
}

.content-article li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.content-article img {
  max-width: 100%;
  height: auto;
  border-radius: var(--card-radius);
  margin: 24px 0;
}

/* === 论坛/社区 === */
.forum-post {
  padding: 20px 24px;
  margin-bottom: 16px;
  display: flex;
  gap: 16px;
}

.forum-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--aurora-purple), var(--neon-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.forum-content {
  flex: 1;
}

.forum-content .forum-user {
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 4px;
}

.forum-content .forum-time {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.forum-content .forum-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.forum-stats {
  display: flex;
  gap: 16px;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* === 页脚 === */
.site-footer {
  background: rgba(10, 14, 39, 0.9);
  border-top: 1px solid var(--glass-border);
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

.footer-col ul li {
  margin-bottom: 8px;
}

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

.footer-col ul a:hover {
  color: var(--aurora-light);
}

.footer-bottom {
  max-width: 1400px;
  margin: 40px auto 0;
  padding: 20px 24px 0;
  border-top: 1px solid rgba(108, 60, 224, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  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) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--glass-border);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .header-actions .btn-download span {
    display: none;
  }

  .hero {
    padding: 120px 16px 60px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

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

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

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

  .encryption-layers {
    flex-direction: column;
  }

  .layer-arrow {
    transform: rotate(90deg);
  }

  .steps-nav {
    flex-wrap: wrap;
  }

  .step-btn {
    flex: 1;
    min-width: 120px;
    border-radius: 8px !important;
    margin: 4px;
  }

  .forum-post {
    flex-direction: column;
  }

  .share-buttons {
    flex-direction: column;
    align-items: center;
  }

  .share-btn {
    width: 200px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .dashboard {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .hero p {
    font-size: 0.9rem;
  }

  .section {
    padding: 48px 0;
  }

  .header-inner {
    height: 60px;
  }

  .hero {
    padding: 100px 16px 48px;
  }
}

/* === 工具类 === */
.text-gradient {
  background: linear-gradient(135deg, #fff, var(--aurora-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }

/* === JSON-LD 隐藏 === */
script[type="application/ld+json"] {
  display: none;
}