/* ============================================================
   IDC 导航 — 全屏纯白导航网站主题
   风格：白色 · 大气 · 导航网站
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
/* ---------- 设计令牌 ---------- */
:root {
  --c-primary:       #1f1f1f;
  --c-primary-h:     #000000;
  --c-primary-soft:  #f2f2f2;
  --c-accent:        #2b2b2b;
  /* 纯白体系 */
  --c-bg:            #ffffff;
  --c-bg-soft:       #fbfbfb;
  --c-bg-card:       #ffffff;
  /* 主操作色（下载、播放等，深浅色各自一套） */
  --c-action:        #1a6cf5;
  --c-action-hover:  #1557cc;
  /* 热门服务器 / 推荐卡片强调色 */
  --trial-accent:       #ff6b35;
  --trial-accent-deep:  #e15724;
  /* 文字 */
  --c-text:          #161616;
  --c-text-2:        #4a4a4a;
  --c-text-3:        #8a8a8a;
  /* 边框 */
  --c-line:          #ebebeb;
  --c-line-strong:   #dfdfdf;
  /* 圆角 */
  --r-sm:   6px;
  --r-md:   10px;
  --r-lg:   14px;
  --r-xl:   20px;
  /* 阴影 */
  --s-xs:   0 1px 4px rgba(0,0,0,.04);
  --s-sm:   0 2px 10px rgba(0,0,0,.06);
  --s-md:   0 8px 24px rgba(0,0,0,.10);
  --s-card: 0 10px 28px rgba(0,0,0,.08);
  /* 字体 */
  --font:   'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  /* 行高 */
  --lh-tight:  1.35;
  --lh-normal: 1.625;
  --lh-loose:  1.85;
  /* 过渡 */
  --ease: .16s cubic-bezier(.4,0,.2,1);
  /* 布局 */
  --header-h: 60px;
  /* 锚点滚动时在固定顶栏下预留空白，避免栏目标题被挡 */
  --anchor-offset: calc(var(--header-h) + 24px);
  /* 全站：顶栏 / 主区 / 页脚 竖向分区；主区内左右栏宽度与间距统一 */
  --layout-sidebar-w: 220px;
  --layout-split-gap: 24px;
  --layout-main-pad-x: 24px;
  --layout-main-pad-y-top: 24px;
  --layout-main-pad-y-bottom: 40px;
  --layout-main-pad-x-sm: 16px;
  --layout-main-pad-y-top-sm: 20px;
  --layout-main-pad-y-bottom-sm: 32px;
  /* 窄屏再收紧（仅移动端覆盖，桌面不用） */
  --layout-main-pad-x-xs: 12px;
  /* 右下角浮动按钮区预留高度，避免主内容最后一屏被挡住 */
  --layout-float-clearance: 120px;
}

@media (max-width: 767px) {
  :root {
    /* 移动端：减少底部预留空白，避免页脚前留白过大 */
    --layout-main-pad-y-bottom-sm: 4px;
    --layout-float-clearance: 0.5rem;
  }
}
/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font);
  font-size: 14px;
  line-height: var(--lh-normal);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
}
h1,h2,h3,h4,h5,h6 {
  font-weight: 700;
  line-height: var(--lh-tight);
  color: var(--c-text);
  margin: 0;
}
h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.0625rem; }
p { margin: 0 0 1em; line-height: var(--lh-normal); }
a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color var(--ease);
}
a:hover { color: var(--c-primary-h); }
/* ============================================================
   Page Skeleton
   ============================================================ */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--c-bg);
}
.page-main { flex: 1; }
/* ============================================================
   顶部导航栏 — 纯白贴顶
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-line);
  box-shadow: 0 1px 6px rgba(0,0,0,.05);
}
.site-header .container-inner {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 var(--layout-main-pad-x);
  gap: 0;
}
/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--c-text) !important;
  white-space: nowrap;
  flex-shrink: 0;
  margin-right: 36px;
  letter-spacing: -.01em;
}
.site-logo .logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: none;
  color: inherit;
  font-size: 1.12rem;
  line-height: 1;
}
.site-logo .logo-icon i {
  color: inherit;
}
.site-logo:hover { color: var(--c-primary) !important; }
/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0;
  height: 100%;
  flex: 1;
}
.site-nav a {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 16px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--c-text-2);
  border-bottom: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease);
  white-space: nowrap;
}
.site-nav a:hover { color: var(--c-primary); border-bottom-color: var(--c-primary); }
.site-nav a.active { color: var(--c-primary); border-bottom-color: var(--c-primary); font-weight: 600; }
.site-nav .free-trial-link {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 0 16px;
}
.site-nav .free-trial-label {
  flex-shrink: 0;
}
/* 末字「器」下垂挂小吊牌，不占右侧横向宽度 */
.site-nav .free-trial-anchor {
  position: relative;
  display: inline-block;
}
.site-nav .nav-hot-tag {
  position: absolute;
  left: auto;
  right: 0;
  top: calc(100% - 4px);
  /* 以吊牌顶端为轴摆动：-30° ↔ -60°（与原先 -45° 同向） */
  transform-origin: 50% 0;
  transform: translate(12px, 2px) rotate(-45deg);
  animation: nav-hot-tag-swing 2.4s ease-in-out infinite;
  display: block;
  pointer-events: none;
  z-index: 2;
}
@keyframes nav-hot-tag-swing {
  0%, 100% { transform: translate(12px, 2px) rotate(-30deg); }
  50% { transform: translate(12px, 2px) rotate(-60deg); }
}
/* 吊绳：随父级 rotate 一起斜挂，此处保持竖直向上即可 */
.site-nav .nav-hot-tag::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  width: 1px;
  height: 7px;
  transform: translateX(-50%);
  background: linear-gradient(to top, rgba(234, 88, 12, .95), rgba(249, 115, 22, .15));
}
.site-nav .nav-hot-tag__body {
  position: relative;
  display: block;
  min-width: 18px;
  padding: 8px 2px 3px;
  border-radius: 2px 2px 5px 5px;
  background: linear-gradient(155deg, #fb923c 0%, #ea580c 55%, #c2410c 100%);
  color: #fff;
  font-size: 7px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: .06em;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, .28);
  box-shadow:
    0 1px 3px rgba(234, 88, 12, .4),
    0 0 12px rgba(251, 146, 60, .35);
  overflow: hidden;
}
/* 顶部透明穿绳孔（与顶栏背景同色） */
.site-nav .nav-hot-tag__body::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-bg);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .22);
  z-index: 2;
}
/* 扫光 */
.site-nav .nav-hot-tag__body::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    100deg,
    transparent 0%,
    transparent 38%,
    rgba(255, 255, 255, .55) 50%,
    transparent 62%,
    transparent 100%
  );
  background-size: 220% 100%;
  animation: nav-hot-tag-shine 2.8s ease-in-out infinite;
  pointer-events: none;
}
@keyframes nav-hot-tag-shine {
  0%, 12% { background-position: 120% 0; }
  55%, 100% { background-position: -120% 0; }
}
.site-nav .free-trial-link:hover .nav-hot-tag__body {
  box-shadow:
    0 2px 6px rgba(234, 88, 12, .5),
    0 0 16px rgba(251, 146, 60, .5);
  border-color: rgba(255, 255, 255, .42);
}
html.io-dark-mode .site-header .nav-hot-tag__body::before {
  background: var(--c-bg-card);
}
html.io-dark-mode .site-nav .nav-hot-tag__body {
  box-shadow:
    0 1px 4px rgba(0, 0, 0, .4),
    0 0 14px rgba(251, 146, 60, .28);
}
@media (prefers-reduced-motion: reduce) {
  .site-nav .nav-hot-tag {
    animation: none;
    transform: translate(12px, 2px) rotate(-45deg);
  }
  .site-nav .nav-hot-tag__body::after {
    animation: none;
  }
}
@media (max-width: 767px) and (prefers-reduced-motion: reduce) {
  .site-nav {
    transition: none;
  }
}
/* Header 右侧 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  margin-left: auto;
}
.lang-switcher {
  display: flex;
  align-items: center;
  border-radius: 8px;
  border: 1px solid var(--c-line);
  background: var(--c-bg-soft);
  padding: 0 8px;
  height: 36px;
}
.lang-select {
  border: none;
  outline: none;
  background: transparent;
  color: var(--c-text);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.25;
  min-width: 96px;
  cursor: pointer;
  font-family: var(--font);
}
.lang-select option {
  color: #1a1a1a;
  background: #fff;
  font-size: 14px;
}
/* 手机端汉堡按钮：桌面端隐藏，由 @media (max-width: 767px) 显示 */
.mobile-nav-toggle {
  display: none;
  box-sizing: border-box;
}
.mobile-nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  /* 低于展开后的顶栏，高于主内容，避免菜单与遮罩错位 */
  z-index: 1001;
  background: rgba(15, 18, 28, 0.45);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  cursor: pointer;
}
.mobile-nav-backdrop.is-visible {
  display: block;
}
/* ============================================================
   内容区 — 全屏两栏
   ============================================================ */
.layout-body {
  display: flex;
  min-height: 0;
  width: 100%;
  gap: var(--layout-split-gap);
  align-items: stretch;
  background: var(--c-bg);
}
/* 左侧分类侧栏 */
.nav-sidebar {
  width: var(--layout-sidebar-w);
  flex-shrink: 0;
  background: var(--c-bg-card);
  border-right: 1px solid var(--c-line);
  padding: 16px 0;
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
}
.nav-sidebar::-webkit-scrollbar { width: 4px; }
.nav-sidebar::-webkit-scrollbar-track { background: transparent; }
.nav-sidebar::-webkit-scrollbar-thumb { background: var(--c-line); border-radius: 99px; }
.sidebar-group { margin-bottom: 6px; }
.sidebar-group-title {
  font-size: .7rem;
  font-weight: 700;
  color: var(--c-text-3);
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: 6px 18px 4px;
}
.sidebar-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 18px;
  font-size: .8375rem;
  font-weight: 500;
  color: var(--c-text-2);
  cursor: pointer;
  transition: background var(--ease), color var(--ease);
  border-left: 2px solid transparent;
  text-decoration: none;
}
.sidebar-item:hover { background: var(--c-bg-soft); color: var(--c-primary); }
.sidebar-item.active {
  background: var(--c-primary-soft);
  color: var(--c-primary);
  border-left-color: var(--c-primary);
  font-weight: 600;
}
.sidebar-item .si-flag { font-size: 1rem; line-height: 1; }
.sidebar-item .si-icon { width: 18px; text-align: center; font-size: .8rem; color: var(--c-text-3); }
/* 右侧主体 */
.main-content {
  flex: 1 1 auto;
  min-width: 0;
  max-width: none;
  margin: 0;
  /* 与侧栏间距由 .layout-body gap 承担，避免与 padding-left 双重留白 */
  padding: var(--layout-main-pad-y-top) var(--layout-main-pad-x) var(--layout-main-pad-y-bottom) 0;
  background: var(--c-bg);
}
/* 机房卡片列更宽，减少单卡压缩感 */
.main-content .row.g-3 > [class*="col-"] {
  flex: 0 0 25%;
  max-width: 25%;
  margin-bottom: 12px;
}
/* articles.php: align cards with toolbar edges */
.main-content .row.g-3.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-left: 0;
  margin-right: 0;
}
.main-content .row.g-3.articles-grid > [class*="col-"] {
  width: 100%;
  min-width: 0;
  flex: none;
  max-width: none;
  padding: 0;
  margin-bottom: 0;
}
@media (max-width: 1200px) {
  .main-content .row.g-3.articles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .main-content .row.g-3.articles-grid > [class*="col-"] {
    max-width: none;
  }
}
@media (max-width: 700px) {
  .main-content .row.g-3.articles-grid {
    grid-template-columns: 1fr;
  }
  .main-content .row.g-3.articles-grid > [class*="col-"] {
    max-width: none;
  }
}
/* 强制取消旧模板可能带来的中间留白 */
.layout-body > .main-content > * {
  max-width: none !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
}
/* ============================================================
   区块标题
   ============================================================ */
.section-hd {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}
/* 与 mall .trial-section-title:before 一致的竖条装饰 */
.section-hd .s-flag {
  flex-shrink: 0;
  width: 4px;
  height: 16px;
  border-radius: 2px;
  background: var(--c-text-3);
}
.section-hd h2 {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--c-text);
}
.section-hd .s-count {
  font-size: .75rem;
  color: var(--c-text-3);
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  padding: 1px 9px;
}
.section-hd .s-more {
  margin-left: auto;
  font-size: .78rem;
  color: #9a9a9a;
  font-weight: 400;
  opacity: 1;
  background: transparent;
  transition: color var(--ease);
}
.section-hd .s-more:hover { color: #6f6f6f; }
/* section-title 兼容旧结构 */
.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}
.section-title .section-flag { font-size: 1.25rem; line-height: 1; }
.section-title h2 { font-size: 1rem; font-weight: 700; color: var(--c-text); }
.section-title .section-more {
  margin-left: auto;
  font-size: .78rem;
  color: var(--c-primary);
  font-weight: 500;
  opacity: .8;
}
.section-title .section-more:hover { opacity: 1; }
/* ============================================================
   IDC 网站卡片
   ============================================================ */
.idc-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: box-shadow var(--ease), transform var(--ease), border-color var(--ease);
  height: 100%;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}
.idc-card:hover {
  box-shadow: var(--s-card);
  transform: translateY(-2px);
  border-color: rgba(0,0,0,.18);
}
.idc-card .card-main {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 14px 10px;
  flex: 1;
}
.idc-card .card-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--r-sm);
  background: var(--c-bg-card);
  border: 1px solid var(--c-line);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}
.idc-card .card-logo img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}
.idc-card .card-info { flex: 1; min-width: 0; }
.idc-card .card-name {
  font-size: .875rem;
  font-weight: 600;
  color: var(--c-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
  margin-bottom: 3px;
}
.idc-card .card-desc {
  font-size: .75rem;
  color: var(--c-text-3);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.idc-card .card-tags {
  padding: 8px 14px 12px;
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  overflow: hidden;
  min-width: 0;
}
.tag-chip {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: .68rem;
  font-weight: 500;
  background: #f5f5f5;
  color: var(--c-primary);
  border: 1px solid #ededed;
  transition: background var(--ease);
  white-space: nowrap;
}
.tag-chip:hover { background: #f1f1f1; }
/* ============================================================
   城市 Tab（横向）
   ============================================================ */
.city-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 16px;
  flex-wrap: wrap;
  background: var(--c-bg-card);
  border-radius: var(--r-sm);
  overflow: hidden;
  border: none;
}
.city-tabs .tab-btn {
  position: relative;
  padding: 8px 18px;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--c-text-2);
  cursor: pointer;
  border: none;
  background: none;
  transition: color var(--ease), background var(--ease);
}
.city-tabs .tab-btn:hover { color: var(--c-primary); background: var(--c-bg-soft); }
.city-tabs .tab-btn.active { color: var(--c-primary); background: var(--c-bg-card); font-weight: 600; }
.city-tabs .tab-btn.active {
  text-decoration-line: underline;
  text-decoration-color: #e14b4b;
  text-decoration-thickness: 1px;
  text-underline-offset: 8px;
  border-bottom: 0 !important;
}
.city-tabs .tab-btn.active::after { content: none !important; }
/* ============================================================
   内容卡片（文章/视频/资源）
   ============================================================ */
.content-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: 20px 22px;
  transition: box-shadow var(--ease), transform var(--ease), border-color var(--ease);
  display: block;
  color: inherit;
}
.content-card .content-main {
  display: block;
  color: inherit;
}
.content-card .content-main:hover { color: inherit; }
.content-card .card-tags {
  margin-top: 10px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
/* 列表/首页 IDC 卡与文章卡：标签与卡面同色阶（亮暗色均走令牌） */
.idc-card .card-tags .tag-chip,
.content-card .card-tags .tag-chip {
  flex-shrink: 0;
  background: var(--c-bg-card);
  border: 1px solid var(--c-line);
  color: var(--c-text-2);
}
.idc-card .card-tags .tag-chip:hover,
.content-card .card-tags .tag-chip:hover {
  background: var(--c-bg-soft);
  color: var(--c-text);
}
.content-card:hover {
  box-shadow: var(--s-card);
  transform: translateY(-2px);
  border-color: rgba(0,0,0,.18);
  color: inherit;
}
.content-card .card-title {
  font-size: .9375rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 6px;
  line-height: 1.45;
}
.content-card .card-summary {
  font-size: .8125rem;
  color: var(--c-text-2);
  line-height: 1.65;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.content-card .card-meta {
  font-size: .75rem;
  color: var(--c-text-3);
  margin-top: 10px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
/* ============================================================
   详情页
   ============================================================ */
.detail-layout {
  display: flex;
  gap: var(--layout-split-gap);
  align-items: flex-start;
  max-width: 1200px;
  margin: 0 auto;
  /* 竖向略大于列表页，左右与全站主区水平内边距一致 */
  padding: 32px var(--layout-main-pad-x) 48px;
}
.detail-main { flex: 1; min-width: 0; }
.detail-aside {
  width: 280px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-h) + 20px);
}
/* 面包屑 */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .78rem;
  color: var(--c-text-3);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb-nav a { color: var(--c-text-3); }
.breadcrumb-nav a:hover { color: var(--c-primary); }
.breadcrumb-nav .sep { color: var(--c-line-strong); }
.breadcrumb-nav .current { color: var(--c-text-2); font-weight: 500; }
/* 文章正文 */
.article-body {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: 36px 40px;
}
.article-body img,
.article-body video {
  max-width: 100%;
  height: auto;
}
.article-body table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.article-body h1 {
  font-size: 1.625rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
  color: var(--c-text);
  letter-spacing: -.02em;
}
.article-body .article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: .78rem;
  color: var(--c-text-3);
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}
.article-body .article-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}
.article-body p {
  font-size: .9375rem;
  line-height: var(--lh-loose);
  color: var(--c-text);
  margin-bottom: 1.1em;
}
.article-body h2 { font-size: 1.25rem; margin: 1.8em 0 .8em; }
.article-body h3 { font-size: 1.0625rem; margin: 1.5em 0 .6em; }
.article-body ul, .article-body ol {
  padding-left: 1.5em;
  margin-bottom: 1.1em;
}
.article-body li {
  font-size: .9375rem;
  line-height: var(--lh-loose);
  margin-bottom: .35em;
}
.article-body code {
  font-size: .875em;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: 4px;
  padding: 1px 6px;
}
/* 视频播放器 */
.video-placeholder {
  aspect-ratio: 16/9;
  background: #f0f0f5;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: #ccc;
  margin-bottom: 20px;
  border: 1px solid var(--c-line);
  position: relative;
  overflow: hidden;
}
/* 侧边栏卡片 */
.aside-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: 18px 20px;
  margin-bottom: 16px;
}
.aside-card-title {
  font-size: .8125rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  display: flex;
  align-items: center;
  gap: 7px;
}
/* ============================================================
   回到顶部浮动按钮
   ============================================================ */
.float-toolbar {
  position: fixed;
  right: 20px;
  bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  z-index: 999;
}
.float-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--c-line);
  box-shadow: var(--s-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-3);
  font-size: .8125rem;
  cursor: pointer;
  transition: var(--ease);
  text-decoration: none;
}
.float-btn:hover {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
  box-shadow: var(--s-md);
}
/* ============================================================
   页脚 Footer — 白色简洁版
   ============================================================ */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--c-line);
  padding: 40px 0 0;
  font-size: .8375rem;
  line-height: var(--lh-loose);
  color: var(--c-text-2);
}
.site-footer .footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--layout-main-pad-x);
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--c-line);
}
@media (max-width: 860px) {
  .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 540px) {
  .site-footer .footer-grid { grid-template-columns: 1fr; }
}
/* 「产品 / 关于」外层包裹：桌面参与原 footer 栅格，移动端整段隐藏 */
.footer-nav-columns {
  display: contents;
}
.footer-brand .logo-text {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--c-text);
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 12px;
}

.footer-brand-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: nowrap;
}

.footer-brand-top .logo-text {
  margin-bottom: 0;
  white-space: nowrap;
}

.site-footer .footer-lang {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.site-footer .footer-lang .lang-switcher {
  height: 32px;
}

.site-footer .footer-lang .lang-select {
  min-width: 92px;
}
.footer-brand .logo-text .logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: none;
  color: inherit;
  font-size: 1.05rem;
  line-height: 1;
}
.footer-brand .logo-text .logo-icon i {
  color: inherit;
}
.footer-brand p {
  color: var(--c-text-3);
  font-size: .8125rem;
  line-height: 1.75;
  margin: 0 0 16px;
}

@media (max-width: 767px) {
  .site-footer {
    padding-top: 26px;
  }
  .site-footer .footer-grid {
    padding-bottom: 20px;
    gap: 20px;
  }
  .footer-brand p {
    margin-bottom: 10px;
  }
}
.footer-col-title {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--c-text);
  margin-bottom: 12px;
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 7px; }
.footer-links a {
  color: var(--c-text-3);
  font-size: .8125rem;
  transition: color var(--ease);
}
.footer-links a:hover { color: var(--c-primary); }
.footer-social { display: flex; gap: 8px; margin-top: 2px; }
.footer-social a {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--c-line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-3);
  font-size: .78rem;
  transition: var(--ease);
}
.footer-social a:hover {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}
.footer-bottom {
  padding: 16px 0;
  font-size: .75rem;
  color: var(--c-text-3);
}

@media (max-width: 640px) {
  .footer-brand-top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
  }

  .site-footer .footer-lang .lang-select {
    min-width: 76px;
  }
}

/* 小屏：语言下拉文字偏小，单独放大以提高清晰度 */
@media (max-width: 767px) {
  .lang-switcher {
    height: 38px;
    padding: 0 10px;
  }
  .lang-select {
    font-size: 16px;
    min-width: 92px;
    letter-spacing: .1px;
  }
  .lang-select option {
    font-size: 16px;
  }
}
/* ============================================================
   Floor 区块间距
   ============================================================ */
.floor-section { margin-bottom: 36px; }
.floor-section:last-child { margin-bottom: 0; }
.floor-section[id],
.trial-section[id] {
  scroll-margin-top: var(--anchor-offset);
}

/* 移动端：最后一个楼层与页脚之间留白收紧 */
@media (max-width: 767px) {
  .main-content .floor-section:last-of-type {
    margin-bottom: 18px;
  }
}
/* ============================================================
   折叠/展开功能
   ============================================================ */
.collapse-toggle {
  margin-left: auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--c-line);
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-3);
  font-size: .75rem;
  transition: var(--ease);
}
.collapse-toggle:hover {
  background: var(--c-bg-soft);
  color: var(--c-primary);
  border-color: var(--c-primary);
}
.collapse-toggle.collapsed i {
  transform: rotate(-90deg);
}
.collapse-toggle i {
  transition: transform var(--ease);
}
.collapse-content {
  overflow: hidden;
  transition: max-height .3s ease, opacity .2s ease;
  max-height: 2000px;
  opacity: 1;
}
.collapse-content.collapsed {
  max-height: 0;
  opacity: 0;
}
/* ============================================================
   工具栏（筛选/排序条）
   ============================================================ */
.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding: 14px 18px 2px 0 ;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-line);
}
.toolbar .toolbar-label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--c-text-2);
  white-space: nowrap;
}
.toolbar > a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 2px 0;
  font-size: .82rem;
  color: var(--c-text-2);
}
.article-category-toolbar > a { margin-right: 12px; }
.article-category-toolbar > a:last-of-type { margin-right: 0; }
.toolbar > a:hover { color: var(--c-text); }
.toolbar > a.active {
  color: var(--c-text);
  font-weight: 600;
}
.toolbar > a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  border-radius: 2px;
  background: #ef4444;
}
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 500;
  color: var(--c-text-2);
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  cursor: pointer;
  transition: var(--ease);
  white-space: nowrap;
}
.filter-chip:hover,
.filter-chip.active {
  background: var(--c-primary-soft);
  color: var(--c-primary);
  border-color: rgba(0,0,0,.18);
}
.toolbar .ml-auto { margin-left: auto; }
/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .nav-sidebar { display: none; }
  .layout-body { gap: 0; }
  .main-content {
    width: 100%;
    padding: var(--layout-main-pad-y-top-sm) var(--layout-main-pad-x-sm) var(--layout-main-pad-y-bottom-sm);
  }
  .main-content .row.g-3 > [class*="col-"] {
    flex: 0 0 50%;
    max-width: 50%;
  }
  .detail-layout {
    flex-direction: column;
    padding: var(--layout-main-pad-y-top-sm) var(--layout-main-pad-x-sm) var(--layout-main-pad-y-bottom-sm);
  }
  .detail-aside { width: 100%; position: static; }
  .site-footer .footer-inner {
    padding: 0 var(--layout-main-pad-x-sm);
  }
}
@media (max-width: 767px) {
  /* 手机：左右略收紧 + 底部为浮动工具条留空，卡片区能完整滚到可视区 */
  .main-content {
    padding-top: max(16px, env(safe-area-inset-top));
    padding-left: max(var(--layout-main-pad-x-xs), env(safe-area-inset-left));
    padding-right: max(var(--layout-main-pad-x-xs), env(safe-area-inset-right));
    padding-bottom: calc(
      var(--layout-main-pad-y-bottom-sm) + var(--layout-float-clearance) + env(safe-area-inset-bottom, 0px)
    );
  }
  .site-footer .footer-nav-columns {
    display: none;
  }
  body.mobile-nav-open {
    overflow: hidden;
    touch-action: none;
  }
  /* 高度随菜单展开，避免固定 60px 把两行挤在一起导致 Logo 行被压扁、视觉上「往上跳」 */
  .site-header {
    position: sticky;
    z-index: 1000;
    height: auto;
    min-height: var(--header-h);
  }
  /* 打开菜单时整顶栏（含 Logo 行与下拉导航）叠在遮罩之上，层级连贯无割裂 */
  body.mobile-nav-open .site-header {
    z-index: 1002;
  }
  .site-header .container-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: var(--header-h) auto;
    align-items: center;
    align-content: start;
    min-height: var(--header-h);
    height: auto;
    padding: 0 var(--layout-main-pad-x-sm);
    row-gap: 0;
    column-gap: 0;
  }
  .site-logo {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
    align-self: center;
    margin-right: 0;
    flex: none;
  }
  .mobile-nav-toggle {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    align-self: center;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 34px;
    height: 34px;
    margin: 0;
    padding: 0;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--c-text);
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--ease);
  }
  .mobile-nav-toggle:hover {
    background: transparent;
  }
  .mobile-nav-toggle-bar {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    transition: transform var(--ease), opacity var(--ease);
  }
  .site-header.mobile-nav-open .mobile-nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .site-header.mobile-nav-open .mobile-nav-toggle-bar:nth-child(2) {
    opacity: 0;
  }
  .site-header.mobile-nav-open .mobile-nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  /* 语言切换移至右下角浮动区；grid 内占位不占行，避免挤出菜单区 */
  .header-actions {
    position: fixed;
    right: calc(20px + env(safe-area-inset-right, 0px));
    bottom: calc(28px + env(safe-area-inset-bottom, 0px));
    z-index: 999;
    margin: 0;
    grid-column: 2;
    grid-row: 1;
    width: 0;
    height: 0;
    padding: 0;
    overflow: visible;
    pointer-events: none;
  }
  .header-actions .lang-switcher {
    position: relative;
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    box-shadow: var(--s-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
  }
  .header-actions .lang-switcher::before {
    content: "\f1ab";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.9375rem;
    color: var(--c-text-3);
    pointer-events: none;
    z-index: 0;
  }
  .header-actions .lang-switcher:hover {
    background: var(--c-primary);
    border-color: var(--c-primary);
  }
  .header-actions .lang-switcher:hover::before {
    color: #fff;
  }
  .header-actions .lang-select {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    min-width: 0;
    opacity: 0;
    cursor: pointer;
    font-size: 16px;
    -webkit-appearance: none;
    appearance: none;
    z-index: 1;
  }
  .float-toolbar {
    right: calc(20px + env(safe-area-inset-right, 0px));
    bottom: calc(28px + 40px + 9px + env(safe-area-inset-bottom, 0px));
  }
  .site-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    min-width: 0;
    flex-direction: column;
    align-items: stretch;
    align-self: stretch;
    height: auto;
    max-height: 0;
    overflow: hidden;
    margin: 0 calc(-1 * var(--layout-main-pad-x-sm));
    padding: 0 var(--layout-main-pad-x-sm);
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: max-height 0.34s cubic-bezier(0.4, 0, 0.2, 1);
    mask-image: none;
    gap: 0;
  }
  .site-header.mobile-nav-open .site-nav {
    max-height: min(78vh, 520px);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    margin: 4px calc(-1 * var(--layout-main-pad-x-sm)) 0;
    padding: 10px 10px 18px;
    border-bottom-color: transparent;
    background: linear-gradient(180deg, var(--c-bg-card) 0%, var(--c-bg-soft) 100%);
    border-radius: 0 0 var(--r-lg) var(--r-lg);
    box-shadow:
      0 18px 40px rgba(0, 0, 0, 0.1),
      0 0 0 1px rgba(0, 0, 0, 0.04);
    gap: 6px;
  }
  .site-nav a,
  .site-nav .free-trial-link {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: auto;
    min-height: 50px;
    padding: 14px 16px;
    border-bottom: none;
    border-left: none;
    border-radius: var(--r-md);
    font-size: 0.9375rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--c-text-2);
    white-space: normal;
    transition: background var(--ease), color var(--ease), box-shadow var(--ease);
  }
  .site-nav a:hover,
  .site-nav .free-trial-link:hover {
    color: var(--c-text);
    background: rgba(0, 0, 0, 0.035);
    border-bottom-color: transparent !important;
  }
  .site-nav a:last-child,
  .site-nav .free-trial-link:last-child {
    border-bottom: none;
  }
  .site-nav a.active {
    color: var(--c-text);
    font-weight: 600;
    background: rgba(31, 31, 31, 0.06);
    box-shadow: inset 4px 0 0 0 var(--c-primary);
    border-bottom-color: transparent !important;
  }
  .site-nav .nav-hot-tag {
    animation: none;
    transform: translate(8px, 1px) rotate(-45deg);
  }
  .toolbar {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    gap: 8px;
    padding: 10px 0 10px;
    margin-bottom: 14px;
    scrollbar-width: thin;
  }
  .toolbar .toolbar-label {
    flex-shrink: 0;
  }
  .article-category-toolbar > a {
    flex-shrink: 0;
    margin-right: 14px;
  }
  .article-category-toolbar > a:last-of-type {
    margin-right: 8px;
  }
  .floor-section .city-tabs,
  .city-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 6px;
    scrollbar-width: none;
    -ms-overflow-style: none;
    gap: 0;
    column-gap: 0;
    row-gap: 0;
    justify-content: flex-start;
  }
  .city-tabs::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
  }
  .floor-section .city-tabs .tab-btn,
  .city-tabs .tab-btn {
    flex-shrink: 0;
    padding: 3px 5px;
    margin: 0;
    font-size: 0.78rem;
  }
  .city-tabs .tab-btn.active {
    text-underline-offset: 4px;
  }
  .section-hd {
    flex-wrap: wrap;
    gap: 4px 8px;
    margin-bottom: 8px;
    padding-bottom: 6px;
  }
  .section-hd .s-flag {
    height: 14px;
    width: 3px;
  }
  .section-hd .s-count {
    display: none;
  }
  .section-hd .s-more {
    margin-left: 0;
    font-size: 0.72rem;
  }
  .section-hd h2 {
    flex: 1 1 auto;
    min-width: 0;
    font-size: 0.9375rem;
    font-weight: 700;
    line-height: 1.35;
  }
  .floor-section {
    margin-bottom: 18px;
  }
  .breadcrumb-nav {
    font-size: .74rem;
    margin-bottom: 14px;
    row-gap: 4px;
  }
  .article-body {
    padding: 18px max(var(--layout-main-pad-x-xs), env(safe-area-inset-right)) 18px
      max(var(--layout-main-pad-x-xs), env(safe-area-inset-left));
  }
  .detail-layout-wide .detail-main .breadcrumb-nav + *,
  .detail-main .breadcrumb-nav {
    margin-bottom: 14px;
  }
  .site-footer {
    padding: 28px 0 0;
  }
  .content-card .card-meta {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 10px;
    scrollbar-width: thin;
    padding-bottom: 2px;
  }
  .content-card .card-meta > span {
    flex-shrink: 0;
  }
  /* 移动端下拉菜单 — 深色下独立渐变与阴影 */
  html.io-dark-mode .site-header.mobile-nav-open .site-nav {
    background: linear-gradient(180deg, #1e314d 0%, #16263d 100%);
    box-shadow:
      0 18px 40px rgba(0, 0, 0, 0.45),
      0 0 0 1px rgba(255, 255, 255, 0.07);
  }
  html.io-dark-mode .site-nav a:hover,
  html.io-dark-mode .site-nav .free-trial-link:hover {
    background: rgba(255, 255, 255, 0.07);
  }
  html.io-dark-mode .site-nav a.active {
    background: rgba(255, 255, 255, 0.1);
    box-shadow: inset 4px 0 0 0 #6b9fff;
  }
}
@media (max-width: 640px) {
  .main-content .row.g-3 > [class*="col-"] {
    flex: 0 0 100%;
    max-width: 100%;
  }
}
/* ============================================================
   深色模式
   ============================================================ */
html.io-dark-mode {
  --c-bg:           #0f1b2d;
  --c-bg-soft:      #13243a;
  --c-bg-card:      #1a2e47;
  --c-text:         #e9f1ff;
  --c-text-2:       #b9cbe2;
  --c-text-3:       #8fa5c1;
  --c-line:         rgba(185,203,226,.16);
  --c-line-strong:  rgba(185,203,226,.26);
  --c-primary:      #dbe8ff;
  --c-primary-h:    #ffffff;
  --c-primary-soft: rgba(219,232,255,.12);
  --c-action:        #3b82f6;
  --c-action-hover:  #2563eb;
  --trial-accent:       #ff9f7a;
  --trial-accent-deep:  #ffb59a;
}
html.io-dark-mode .site-header,
html.io-dark-mode .site-footer,
html.io-dark-mode .idc-card,
html.io-dark-mode .content-card,
html.io-dark-mode .resource-card,
html.io-dark-mode .aside-card,
html.io-dark-mode .article-body,
html.io-dark-mode .toolbar,
html.io-dark-mode .city-tabs {
  background: var(--c-bg-card);
}
/* 分类工具栏：暗色下左侧留空、略抬高叠层；亮色保持原样 */
html.io-dark-mode .toolbar.article-category-toolbar {
  position: relative;
  z-index: 1;
  padding-left: 14px;
}
html.io-dark-mode body { background: var(--c-bg); }
html.io-dark-mode .main-content { background: var(--c-bg); }
html.io-dark-mode .nav-sidebar { background: var(--c-bg-card); }
html.io-dark-mode .lang-switcher {
  background: rgba(19,36,58,.55);
  border-color: rgba(185,203,226,.28);
}
html.io-dark-mode .mobile-nav-toggle {
  background: transparent;
  color: #dbe8fb;
}
html.io-dark-mode .mobile-nav-toggle:hover {
  background: rgba(219, 232, 255, 0.1);
}
html.io-dark-mode .lang-select { color: #dbe8fb; }
html.io-dark-mode .lang-select option {
  color: #e9f1ff;
  background: #1a2e47;
}
html.io-dark-mode .header-actions .lang-switcher::before {
  color: #dbe8fb;
}
html.io-dark-mode .header-actions .lang-switcher:hover::before {
  color: #fff;
}
html.io-dark-mode .section-hd .s-more { color: var(--c-text-3); }
html.io-dark-mode .section-hd .s-more:hover { color: var(--c-text-2); }
html.io-dark-mode .section-hd .s-count {
  color: #d7e5f7;
  background: rgba(185,203,226,.10);
  border-color: rgba(185,203,226,.30);
}
html.io-dark-mode .idc-card .card-desc { color: #a9bdd8; }
html.io-dark-mode .sidebar-group-title { color: #9fb6d2; }
html.io-dark-mode .sidebar-item { color: #c4d3e8; }
html.io-dark-mode .sidebar-item .si-icon { color: #a9bdd8; }
html.io-dark-mode .city-tabs .tab-btn { color: #c6d6ea; }
html.io-dark-mode .city-tabs .tab-btn:hover { color: #edf4ff; }
html.io-dark-mode .city-tabs .tab-btn {
  background: rgba(19,36,58,.35);
}
html.io-dark-mode .city-tabs .tab-btn.active {
  color: #ffffff;
  background: rgba(26,46,71,.95);
}
html.io-dark-mode .city-tabs {
  border: none;
  box-shadow: none;
}
html.io-dark-mode .tag-chip {
  background: rgba(185,203,226,.13);
  border-color: rgba(185,203,226,.30);
  color: #dbe8fb;
}
html.io-dark-mode .tag-chip:hover { background: rgba(185,203,226,.16); }
/* ============================================================
   全站正文区行高（沿用 --lh-normal，不新增配色）
   ============================================================ */
.article-body,
.detail-main .article-body {
  line-height: var(--lh-normal);
}
/* so.html */
.so-redirect-page {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  font-family: var(--font);
  font-size: 14px;
  line-height: var(--lh-normal);
  color: var(--c-text);
  background: var(--c-bg);
}
.so-redirect-msg {
  margin: 0;
  text-align: center;
  max-width: 28rem;
}
/* ============================================================
   旧样式兼容 & 覆盖
   ============================================================ */
#sidebar { display: none !important; }
.content-container {
  max-width: 100%;
  margin: 0;
  padding: var(--layout-main-pad-y-top) var(--layout-main-pad-x) var(--layout-main-pad-y-bottom);
}
@media (max-width: 640px) {
  .content-container {
    padding: var(--layout-main-pad-y-top-sm) var(--layout-main-pad-x-sm) var(--layout-main-pad-y-bottom-sm);
  }
}