/* ============================================
   EastCMS 官网模板 - eastcms.css
   依赖：static/layui/css/layui.css
   ============================================ */

/* ===== CSS 变量 ===== */
:root {
  --primary: #1677ff;
  --primary-dark: #0958d9;
  --primary-light: #e6f4ff;
  --bg-white: #ffffff;
  --bg-light: #f7f8fa;
  --bg-dark: #141a23;
  --text: #1d2129;
  --text-light: #4e5969;
  --text-muted: #86909c;
  --border: #e5e6eb;
  --shadow: 0 2px 20px rgba(0,0,0,.06);
  --shadow-hover: 0 6px 30px rgba(0,0,0,.1);
  --radius: 8px;
}

/* ===== 全局 ===== */
* { box-sizing: border-box; }
body { background: #fff; color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--text); transition: color .2s; }
a:hover { color: var(--primary); text-decoration: none; }
img { max-width: 100%; height: auto; }
.layui-container { max-width: 1200px; }

/* ===== 顶部工具栏 ===== */
.toolbar { background: var(--bg-light); border-bottom: 1px solid var(--border); font-size: 12px; color: var(--text-muted); line-height: 32px; }
.toolbar a { color: var(--text-muted); }
.toolbar a:hover { color: var(--primary); }
.toolbar .toolbar-inner { display: flex; justify-content: space-between; align-items: center; }
.toolbar .welcome-text { white-space: nowrap; }
.toolbar .tblinks { white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.toolbar .sep { color: var(--border); }

/* ===== 头部导航 ===== */
.header-main { background: linear-gradient(180deg, #0d1b3e 0%, #0f2147 50%, #142e63 100%); box-shadow: 0 2px 16px rgba(0,0,0,.25); position: sticky; top: 0; z-index: 999; }
.header-main .header-row { display: flex; align-items: center; flex-wrap: wrap; }
.header-main .logo { padding: 10px 0; }
.header-main .logo img { height: 42px; filter: brightness(1.2); }
.header-main .logo h1 { margin: 0; font-size: 22px; color: #fff; font-weight: 700; letter-spacing: 1px; }

/* 导航栏 */
.nav-wrap { background: #142e63; border-top: 1px solid rgba(255,255,255,.08); }
.nav-menu .layui-nav { background: transparent; padding: 0; }
.nav-menu .layui-nav .layui-nav-item { line-height: 52px; }
.nav-menu .layui-nav .layui-nav-item a { font-size: 15px; color: rgba(255,255,255,.82); padding: 0 22px; transition: all .2s; letter-spacing: .5px; }
.nav-menu .layui-nav .layui-nav-item a:hover { color: #fff; background: rgba(255,255,255,.06); }
.nav-menu .layui-nav .layui-nav-item.layui-this a { color: #fff; font-weight: 600; background: rgba(255,255,255,.08); }
.nav-menu .layui-nav .layui-this:after { background: #4dabf7; height: 3px; }

/* 搜索框 */
.header-search { padding: 8px 0; }
.header-search form { display: flex; align-items: center; justify-content: flex-end; }
.header-search .layui-input { height: 36px; border-radius: 4px 0 0 4px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); color: #fff; }
.header-search .layui-input::placeholder { color: rgba(255,255,255,.4); }
.header-search .layui-input:focus { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.3); }
.header-search .layui-btn { border-radius: 0 4px 4px 0; height: 36px; line-height: 36px; padding: 0 16px; }
.header-search .layui-form-select .layui-edge { border-top-color: rgba(255,255,255,.5); }
.header-search .layui-form-select dl { color: var(--text); }

/* 移动端 */
.mobile-menu-btn { display: none; position: absolute; right: 15px; top: 20px; font-size: 26px; cursor: pointer; color: rgba(255,255,255,.8); }
@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }
  .nav-menu { display: none; width: 100%; }
  .nav-menu.show { display: block; }
  .nav-menu .layui-nav .layui-nav-item { display: block; line-height: 44px; text-align: center; border-bottom: 1px solid rgba(255,255,255,.08); }
  .toolbar { display: none; }
  .header-search { padding: 5px 0; }
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-block;
  padding: 14px 40px;
  background: var(--primary);
  color: #fff !important;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  transition: all .3s;
  border: none;
  cursor: pointer;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(22,119,255,.35); }
.btn-outline {
  display: inline-block;
  padding: 14px 40px;
  background: transparent;
  color: var(--primary) !important;
  border: 1.5px solid var(--primary);
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  transition: all .3s;
  cursor: pointer;
}
.btn-outline:hover { background: var(--primary-light); transform: translateY(-1px); }

/* ===== Hero 主视觉 ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0a1f44 0%, #14377a 40%, #1a56b0 100%);
  padding: 100px 0 80px;
  text-align: center;
  overflow: hidden;
}
.hero .hero-bg {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,.06) 0%, transparent 50%),
              radial-gradient(circle at 70% 30%, rgba(22,119,255,.15) 0%, transparent 40%);
}
.hero .hero-content { position: relative; z-index: 1; }
.hero h1 { font-size: 56px; color: #fff; margin: 0 0 15px; font-weight: 800; letter-spacing: 2px; }
.hero h1 .layui-icon { font-size: 56px; }
.hero .hero-subtitle { font-size: 22px; color: rgba(255,255,255,.85); margin: 0 0 24px; font-weight: 300; letter-spacing: 8px; }
.hero .hero-desc { font-size: 16px; color: rgba(255,255,255,.65); line-height: 1.8; margin-bottom: 36px; }
.hero .hero-actions { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-bottom: 24px; }
.hero .hero-version { font-size: 13px; color: rgba(255,255,255,.45); }

/* 首页 Hero 单独覆盖 btn-outline */
.hero .btn-outline { color: #fff !important; border-color: rgba(255,255,255,.4); }
.hero .btn-outline:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.6); }

@media (max-width: 768px) {
  .hero { padding: 60px 20px 50px; }
  .hero h1 { font-size: 36px; }
  .hero .hero-subtitle { font-size: 16px; letter-spacing: 4px; }
  .hero .hero-desc { font-size: 14px; }
  .hero .hero-actions { flex-direction: column; align-items: center; }
  .hero .hero-actions a { width: 220px; text-align: center; }
}

/* ===== 通用标题 ===== */
.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.section-title h2 { font-size: 24px; margin: 0; color: var(--text); position: relative; padding-left: 14px; }
.section-title h2:before { content: ''; position: absolute; left: 0; top: 3px; bottom: 3px; width: 4px; background: var(--primary); border-radius: 2px; }
.section-title .sc-more { font-size: 13px; color: var(--text-muted); }
.section-title .sc-more:hover { color: var(--primary); }

/* ===== 功能特性卡片 ===== */
.features { padding: 80px 0; background: #fff; }
.features .section-title { text-align: center; display: block; border-bottom: none; }
.features .section-title h2 { padding-left: 0; display: inline-block; }
.features .section-title h2:before { display: none; }
.features .section-title h2:after { content: ''; display: block; margin: 10px auto 0; width: 50px; height: 3px; background: var(--primary); border-radius: 2px; }
.features .section-title p { color: var(--text-muted); font-size: 15px; margin-top: 10px; }

.feature-card {
  text-align: center;
  padding: 40px 24px;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all .3s;
  height: 100%;
}
.feature-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.feature-card .fc-icon { width: 64px; height: 64px; line-height: 64px; margin: 0 auto 20px; background: var(--primary-light); border-radius: 16px; }
.feature-card .fc-icon i { font-size: 32px; color: var(--primary); }
.feature-card h3 { font-size: 18px; margin: 0 0 12px; color: var(--text); }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.8; margin: 0; }

@media (max-width: 768px) {
  .features { padding: 50px 15px; }
}

/* ===== 数据统计条 ===== */
.stats-bar { background: var(--bg-dark); padding: 50px 0; margin: 0; }
.stat-item { text-align: center; padding: 10px 15px; position: relative; }
.stat-item::after {
  content: '';
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background: rgba(255,255,255,.08);
}
.layui-col-xs6:nth-child(2n) .stat-item::after,
.layui-col-sm3:last-child .stat-item::after { display: none; }
.stat-item i { display: block; font-size: 28px; color: #4dabf7; margin-bottom: 12px; }
.stat-item strong { display: block; font-size: 18px; color: #fff; font-weight: 600; margin-bottom: 8px; }
.stat-item span { display: block; font-size: 13px; color: rgba(255,255,255,.45); line-height: 1.8; }

@media (max-width: 768px) {
  .stats-bar { padding: 35px 15px; }
  .stat-item { padding: 15px 10px; }
  .stat-item strong { font-size: 16px; }
}

/* ===== 新闻动态 ===== */
.news-section { padding: 60px 0; background: var(--bg-light); }
.news-list { list-style: none; padding: 0; margin: 0; background: #fff; border-radius: var(--radius); padding: 10px 24px; box-shadow: var(--shadow); }
.news-list li { padding: 14px 0; border-bottom: 1px dotted var(--border); display: flex; align-items: center; gap: 12px; }
.news-list li:last-child { border-bottom: none; }
.news-list li a { flex: 1; font-size: 15px; }
.news-list .nl-date { color: var(--text-muted); font-size: 12px; white-space: nowrap; }
.news-list .nl-cat { font-size: 12px; color: var(--primary); background: var(--primary-light); padding: 2px 8px; border-radius: 3px; white-space: nowrap; }

@media (max-width: 768px) {
  .news-list li { flex-wrap: wrap; }
  .news-list li a { flex: 0 0 100%; order: -1; }
}

/* ===== 适用场景 ===== */
.scenarios-section { padding: 70px 0; background: var(--bg-light); }
.scenarios-section .section-title .sc-sub { font-size: 14px; color: var(--text-muted); }

/* 场景卡片 */
.scenario-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all .3s;
  height: 100%;
}
.scenario-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.scenario-card .sci-top {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.scenario-card .sci-top i { font-size: 44px; color: #fff; position: relative; z-index: 1; }
.scenario-card .sci-top::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: .85;
  transition: opacity .3s;
}
.scenario-card:hover .sci-top::before { opacity: 1; }
.scenario-card:nth-child(1) .sci-top { background: linear-gradient(135deg, #1677ff, #4096ff); }
.scenario-card:nth-child(2) .sci-top { background: linear-gradient(135deg, #fa8c16, #ffc069); }
.scenario-card:nth-child(3) .sci-top { background: linear-gradient(135deg, #0fa881, #36cfc9); }
.scenario-card:nth-child(4) .sci-top { background: linear-gradient(135deg, #eb2f96, #ff85c0); }
.scenario-card:nth-child(5) .sci-top { background: linear-gradient(135deg, #722ed1, #b37feb); }
.scenario-card:nth-child(6) .sci-top { background: linear-gradient(135deg, #08979c, #5cdbd3); }
.scenario-card .sci-body { padding: 24px 20px; text-align: center; }
.scenario-card .sci-body h3 { font-size: 18px; margin: 0 0 8px; color: var(--text); }
.scenario-card .sci-body p { font-size: 13px; color: var(--text-light); line-height: 1.7; margin: 0; }

/* 右侧边栏卡片组 */
.sidebar-card { display: flex; flex-direction: column; gap: 20px; }
.sidebar-card-item {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 38px 24px;
  text-align: center;
  transition: all .3s;
}
.sidebar-card-item:hover { box-shadow: var(--shadow-hover); }
.sidebar-card-item .sci-icon { margin-bottom: 12px; }
.sidebar-card-item .sci-icon i { font-size: 38px; color: var(--primary); }
.sidebar-card-item h3 { font-size: 18px; margin: 0 0 18px; color: var(--text); }
.sidebar-card-item p { font-size: 13px; color: var(--text-light); line-height: 1.6; margin: 0 0 15px; }

/* 商业授权卡片（高亮） */
.sidebar-card-primary {
  background: linear-gradient(155deg, #f0f5ff 0%, #e6f4ff 100%);
  border: 1px solid #b3d4ff;
}

/* 联系列表 */
.contact-list { list-style: none; padding: 0; margin: 8px 0 0; text-align: left; }
.contact-list li { padding: 8px 0; font-size: 13px; color: var(--text-light); border-bottom: 1px dashed var(--border); display: flex; align-items: center; gap: 10px; }
.contact-list li:last-child { border-bottom: none; }
.contact-list li span { display: inline-block; min-width: 40px; color: var(--text-muted); font-size: 12px; }

/* 小号按钮 */
.btn-sm { padding: 8px 26px !important; font-size: 14px !important; }

@media (max-width: 768px) {
  .scenarios-section { padding: 50px 15px; }
  .scenario-card .sci-top { height: 80px; }
  .scenario-card .sci-top i { font-size: 34px; }
  .sidebar-card { gap: 16px; }
}

/* ===== 下载卡片 ===== */
.download-card {
  background: linear-gradient(135deg, var(--primary-light) 0%, #f0f5ff 100%);
  border: 1px solid #b3d4ff;
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
}
.download-card .dc-icon i { font-size: 48px; color: var(--primary); }
.download-card .dc-info h3 { font-size: 20px; margin: 10px 0 6px; }
.download-card .dc-info p { font-size: 13px; color: var(--text-muted); margin: 0; }

/* ===== 通用卡片模块 ===== */
.section-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 20px; overflow: hidden; }
.section-card .sc-header { padding: 15px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.section-card .sc-header strong { font-size: 16px; color: var(--text); border-left: 3px solid var(--primary); padding-left: 10px; }
.section-card .sc-header .sc-more { font-size: 13px; color: var(--text-muted); }
.section-card .sc-header .sc-more:hover { color: var(--primary); }
.section-card .sc-body { padding: 15px 20px; }

/* ===== 文章列表 ===== */
.article-list { list-style: none; padding: 0; margin: 0; }
.article-list li { padding: 12px 0; border-bottom: 1px solid var(--border); display: flex; gap: 15px; }
.article-list li:last-child { border-bottom: none; }
.article-list .al-thumb { flex-shrink: 0; width: 160px; height: 110px; border-radius: 4px; overflow: hidden; }
.article-list .al-thumb img { width: 100%; height: 100%; object-fit: cover; }
.article-list .al-info { flex: 1; min-width: 0; }
.article-list .al-info h3 { font-size: 16px; margin: 0 0 8px; line-height: 1.4; }
.article-list .al-info h3 a:hover { color: var(--primary); }
.article-list .al-info .al-desc { color: var(--text-light); font-size: 13px; line-height: 1.6; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-list .al-info .al-meta { font-size: 12px; color: var(--text-muted); }
.article-list .al-info .al-meta span { margin-right: 12px; }
@media (max-width: 600px) {
  .article-list li { flex-direction: column; }
  .article-list .al-thumb { width: 100%; height: 180px; }
}

/* ===== 侧边栏 ===== */
.side-hot-list { list-style: none; padding: 0; margin: 0; }
.side-hot-list li { padding: 8px 0; border-bottom: 1px dotted var(--border); }
.side-hot-list li:last-child { border-bottom: none; }
.side-hot-list li a { font-size: 14px; }
.side-hot-list .sh-num { display: inline-block; width: 20px; height: 20px; line-height: 20px; text-align: center; border-radius: 3px; background: #eee; color: var(--text-muted); font-size: 12px; margin-right: 8px; }
.side-hot-list li:first-child .sh-num,
.side-hot-list li:nth-child(2) .sh-num,
.side-hot-list li:nth-child(3) .sh-num { background: var(--primary); color: #fff; }

.side-channel-list { list-style: none; padding: 0; margin: 0; }
.side-channel-list li { border-bottom: 1px dotted var(--border); }
.side-channel-list li a { display: block; padding: 10px 15px; font-size: 14px; transition: all .2s; }
.side-channel-list li a:hover,
.side-channel-list li a.thisclass { background: var(--primary-light); color: var(--primary); }

/* ===== 文章详情页 ===== */
.article-detail { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 36px; }
.article-detail .ad-title { text-align: center; margin-bottom: 20px; }
.article-detail .ad-title h1 { font-size: 26px; margin: 0 0 12px; color: var(--text); font-weight: 700; line-height: 1.4; }
.article-detail .ad-meta { text-align: center; color: var(--text-muted); font-size: 13px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.article-detail .ad-meta span { margin: 0 12px; }
.article-detail .ad-intro { background: var(--bg-light); border-left: 4px solid var(--primary); padding: 14px 20px; margin: 24px 0; color: var(--text-light); font-size: 14px; line-height: 1.9; border-radius: 0 4px 4px 0; }
.article-detail .ad-content { font-size: 16px; line-height: 2.1; color: var(--text); word-wrap: break-word; }
.article-detail .ad-content p { margin: 0 0 18px; }
.article-detail .ad-content img { max-width: 100%; height: auto; border-radius: 4px; margin: 12px 0; }
.article-detail .ad-content blockquote { background: var(--bg-light); border-left: 4px solid var(--primary); padding: 12px 20px; margin: 18px 0; color: var(--text-light); }

.article-detail .ad-pages { text-align: center; margin: 20px 0; }
.article-detail .ad-pages ul { display: inline-flex; gap: 5px; padding: 0; }
.article-detail .ad-pages a { display: inline-block; padding: 8px 16px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.article-detail .ad-pages a:hover,
.article-detail .ad-pages .thisclass { background: var(--primary); color: #fff; border-color: var(--primary); }

.article-detail .ad-prevnext { display: flex; justify-content: space-between; border-top: 1px solid var(--border); padding-top: 18px; margin-top: 24px; }
.article-detail .ad-prevnext a { font-size: 14px; color: var(--text-light); }
.article-detail .ad-prevnext a:hover { color: var(--primary); }

.article-detail .ad-qrcode { text-align: center; margin: 24px 0; }

.article-detail .ad-digg { text-align: center; margin: 24px 0; }
.article-detail .ad-digg button { padding: 10px 36px; margin: 0 10px; border: none; border-radius: 6px; font-size: 14px; cursor: pointer; transition: all .3s; }
.article-detail .ad-digg .digg-up { background: #f0f7ff; color: var(--primary); border: 1px solid #b3d4ff; }
.article-detail .ad-digg .digg-down { background: #fff5f5; color: #f5222d; border: 1px solid #ffccc7; }
.article-detail .ad-digg .digg-up:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.article-detail .ad-digg .digg-down:hover { background: #f5222d; color: #fff; border-color: #f5222d; }

.article-detail .ad-actions { text-align: center; margin: 18px 0; }
.article-detail .ad-actions a { display: inline-block; margin: 0 10px; color: var(--text-light); font-size: 13px; }
.article-detail .ad-actions a:hover { color: var(--primary); }

@media (max-width: 768px) {
  .article-detail { padding: 20px 15px; }
  .article-detail .ad-title h1 { font-size: 20px; }
  .article-detail .ad-content { font-size: 15px; line-height: 1.9; }
}

/* ===== 分页 ===== */
.pagination-wrap { text-align: center; padding: 30px 0; }
.pagination-wrap .pageinfo { margin-bottom: 10px; color: var(--text-muted); font-size: 13px; }
.pagination-wrap a,
.pagination-wrap .thisclass { display: inline-block; height: 38px; line-height: 38px; padding: 0 16px; border: 1px solid var(--border); border-radius: 6px; margin: 0 4px; font-size: 14px; color: var(--text); transition: all .2s; }
.pagination-wrap a:hover { color: var(--primary); border-color: var(--primary); }
.pagination-wrap .thisclass { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===== 面包屑 ===== */
.breadcrumb { padding: 14px 0; color: var(--text-muted); font-size: 13px; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }

/* ===== 搜索页 ===== */
.search-header-box { background: linear-gradient(135deg, var(--primary-light) 0%, #f0f5ff 100%); padding: 40px 0; text-align: center; margin-bottom: 24px; }
.search-header-box .search-title { font-size: 22px; margin-bottom: 16px; color: var(--text); font-weight: 600; }
.search-header-box .layui-inline .layui-input { height: 44px; width: 320px; border-radius: 22px 0 0 22px; }
.search-header-box .layui-inline .layui-btn { height: 44px; border-radius: 0 22px 22px 0; }
.search-result-bar { padding: 12px 0; color: var(--text-muted); font-size: 14px; }
.search-result-bar strong { color: var(--primary); }
.search-result-item { background: #fff; padding: 22px 28px; margin-bottom: 14px; border-radius: var(--radius); box-shadow: var(--shadow); transition: all .2s; }
.search-result-item:hover { box-shadow: var(--shadow-hover); }
.search-result-item h3 { margin: 0 0 10px; font-size: 17px; }
.search-result-item p { color: var(--text-light); font-size: 13px; line-height: 1.7; margin-bottom: 10px; }
.search-result-item .sri-meta { font-size: 12px; color: var(--text-muted); }

/* ===== TAG标签 ===== */
.tag-cloud { padding: 15px; text-align: left; }
.tag-cloud a { display: inline-block; margin: 5px 6px; padding: 6px 16px; border-radius: 20px; background: var(--primary-light); color: var(--primary); font-size: 13px; transition: all .3s; }
.tag-cloud a:hover { background: var(--primary); color: #fff; }

/* ===== 单页面 ===== */
.singlepage-box { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 36px; }
.singlepage-box .sp-title { text-align: center; margin-bottom: 30px; }
.singlepage-box .sp-title h1 { font-size: 24px; }
.singlepage-box .sp-content { font-size: 16px; line-height: 2.1; }

/* ===== 底部 ===== */
.footer { background: var(--bg-dark); color: #b0b8c4; padding: 30px 0; border-top: 1px solid rgba(255, 255, 255, .08); }
.footer a { color: #b0b8c4; }
.footer a:hover { color: var(--primary); }
.footer-bottom { text-align: center; }
.footer-bottom p { font-size: 13px; line-height: 1.8; margin: 0; }

/* ===== 辅助 ===== */
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.text-center { text-align: center; }