:root {
  --color-primary: #345daa;
  --color-primary-dark: #274a8c;
  --color-primary-light: #eef3fb;
  --color-primary-lighter: #f6f9fe;
  --color-accent: #ff6b35;
  --color-success: #1a9e6c;
  --color-warning: #f5a623;
  --color-danger: #e5484d;
  --color-violet: #7c5cdb;
  --color-cyan: #0e9aa7;
  --color-teal: #0b7285;
  --color-bg: #f4f6fb;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-text-secondary: #5b6472;
  --color-text-muted: #9aa3b2;
  --color-border: #e4e8f0;
  --font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", var(--font-heading);
  --space-1: 4px; --space-2: 8px; --space-3: 12px;
  --space-4: 16px; --space-5: 24px; --space-6: 32px; --space-7: 48px;
  --radius-sm: 6px; --radius: 10px; --radius-lg: 16px;
  --shadow-card: 0 1px 2px rgba(31,41,55,.04), 0 8px 24px rgba(31,41,55,.06);
  --shadow-pop: 0 16px 40px rgba(31,41,55,.14);
  --sidebar-w: 340px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* 顶栏 */
.topbar { background: var(--color-primary-dark); color: #dbe4f5; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; height: 36px; }
.topbar .dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #7ee2b0; margin-right: 6px; vertical-align: 1px; }
.topbar a { color: #fff; }
.topbar .right span { margin-left: 16px; }

/* 头部 */
.header { background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.header .container { display: flex; align-items: center; gap: 20px; padding: 18px 24px; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo-img { height: 52px; width: auto; display: block; }
.brand-divider { width: 1px; height: 28px; background: var(--color-border); }
.brand-slogan { font-size: 13px; color: var(--color-text-secondary); letter-spacing: .5px; white-space: nowrap; }
.header-spacer { flex: 1; }
.search { display: flex; border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; background: #fff; }
.search input { border: none; outline: none; padding: 10px 14px; width: 280px; font-size: 14px; color: var(--color-text); }
.search button { border: none; background: var(--color-primary); color: #fff; padding: 0 20px; font-size: 14px; cursor: pointer; }
.cta-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-accent); color: #fff; border: none; border-radius: var(--radius);
  padding: 11px 20px; font-size: 14px; font-weight: 600; cursor: pointer;
  box-shadow: 0 6px 16px rgba(255,107,53,.28);
}

/* 导航 */
.nav { background: var(--color-surface); border-bottom: 2px solid var(--color-primary); }
.nav .container { display: flex; align-items: center; height: 48px; }
.nav .links { display: flex; align-items: center; flex: 1; }
.nav a { padding: 0 18px; font-size: 15px; color: var(--color-text); height: 48px; line-height: 48px; border-bottom: 3px solid transparent; }
.nav a.active { color: var(--color-primary); font-weight: 700; border-bottom-color: var(--color-primary); }
.nav a:hover { color: var(--color-primary); }
.nav .spacer { flex: 1; }
.nav .timeline-link { color: var(--color-text-secondary); font-size: 14px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 6px 10px; font-size: 16px; cursor: pointer; }

/* 页面骨架 */
.page { padding: var(--space-5) 0 var(--space-7); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) var(--sidebar-w); gap: var(--space-5); }
.hero-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  min-height: 300px; display: flex; flex-direction: column; justify-content: flex-end;
  background: linear-gradient(135deg, #22437e 0%, #345daa 55%, #5b8adf 100%);
  color: #fff; padding: 28px; box-shadow: var(--shadow-card);
}
.hero-card::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(circle at 78% 22%, rgba(255,255,255,.16) 0 40px, transparent 41px),
    radial-gradient(circle at 88% 38%, rgba(255,255,255,.10) 0 26px, transparent 27px),
    radial-gradient(circle at 70% 60%, rgba(255,255,255,.07) 0 18px, transparent 19px);
}
.hero-tag {
  display: inline-flex; align-items: center; align-self: flex-start; gap: 8px;
  background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.35);
  border-radius: 999px; padding: 4px 12px; font-size: 12px; margin-bottom: 16px; z-index: 1;
}
.hero-tag .new { background: var(--color-accent); color: #fff; border-radius: 4px; padding: 1px 6px; font-size: 11px; font-weight: 700; }
.hero-title { font-family: var(--font-heading); font-size: 26px; font-weight: 800; line-height: 1.45; z-index: 1; }
.hero-title a { color: #fff; }
.hero-title a:hover { text-decoration: underline; }
.hero-meta { z-index: 1; margin-top: 12px; font-size: 13px; color: rgba(255,255,255,.85); }
.headline-list { margin-top: var(--space-4); background: var(--color-surface); border-radius: var(--radius); box-shadow: var(--shadow-card); padding: 6px 0; }
.headline-list .item { display: flex; align-items: center; gap: 10px; padding: 10px 18px; font-size: 14px; }
.headline-list .item + .item { border-top: 1px solid var(--color-border); }
.headline-list .rank { color: var(--color-text-muted); font-family: var(--font-num); font-size: 15px; font-weight: 700; }
.headline-list .item:hover { background: var(--color-primary-lighter); }
.headline-list .txt { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.headline-list .time { color: var(--color-text-muted); font-size: 12px; flex: none; }

/* 倒计时卡片 */
.countdown { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: var(--space-5); }
.countdown .head { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-3); }
.countdown .head h3 { font-size: 16px; font-weight: 700; }
.countdown .head .label { font-size: 12px; color: var(--color-text-muted); }
.count-num { text-align: center; background: var(--color-primary-lighter); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 14px 0 10px; margin-bottom: var(--space-4); }
.count-num .days { font-family: var(--font-num); font-size: 44px; font-weight: 800; color: var(--color-primary); line-height: 1.1; }
.count-num .days b { color: var(--color-accent); font-weight: 800; }
.count-num .desc { font-size: 13px; color: var(--color-text-secondary); margin-top: 4px; }
.node { display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 13px; }
.node + .node { border-top: 1px dashed var(--color-border); }
.node .date { color: var(--color-text-muted); font-family: var(--font-num); width: 74px; flex: none; }
.node .name { flex: 1; }
.node .flag { font-size: 11px; color: #fff; border-radius: 4px; padding: 1px 6px; }
.node .flag.hot { background: var(--color-accent); }
.node .flag.next { background: var(--color-primary); }
.countdown .cta { display: block; text-align: center; margin-top: var(--space-4); background: var(--color-primary); color: #fff; border-radius: var(--radius); padding: 11px; font-size: 14px; font-weight: 600; }

/* 主体栅格 */
.main-grid { display: grid; grid-template-columns: minmax(0, 1fr) var(--sidebar-w); gap: var(--space-5); margin-top: var(--space-6); align-items: start; }

/* 频道板块 */
.channels { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.channel-block { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: var(--space-4) var(--space-5) var(--space-2); }
.c-head { display: flex; align-items: center; gap: 8px; padding-bottom: var(--space-3); margin-bottom: var(--space-2); border-bottom: 1px solid var(--color-border); }
.c-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c, var(--color-primary)); flex: none; }
.c-name { font-size: 16px; font-weight: 700; }
.c-count { font-size: 12px; color: var(--color-text-muted); margin-left: 2px; }
.c-more { margin-left: auto; font-size: 13px; color: var(--color-primary); font-weight: 600; }
.c-item { padding: var(--space-3) 0; }
.c-item + .c-item { border-top: 1px dashed var(--color-border); }
.c-title { font-size: 14px; font-weight: 600; line-height: 1.5; color: var(--color-text); }
.c-title:hover { color: var(--color-primary); }
.c-new { background: var(--color-accent); color: #fff; border-radius: 4px; padding: 1px 6px; font-size: 11px; font-weight: 700; margin-left: 6px; vertical-align: 1px; }
.c-meta { font-size: 12px; color: var(--color-text-muted); margin-top: 3px; }
.c-meta .src { color: var(--color-primary); }

/* 侧栏 */
.side { display: flex; flex-direction: column; gap: var(--space-5); }
.panel { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: var(--space-5); }
.panel h3 { font-size: 16px; font-weight: 700; margin-bottom: var(--space-4); display: flex; align-items: center; gap: 8px; }
.panel h3::before { content: ""; width: 4px; height: 16px; border-radius: 2px; background: var(--color-primary); }
.topic { border-radius: var(--radius); overflow: hidden; margin-bottom: var(--space-4); box-shadow: var(--shadow-card); }
.topic .cover { height: 76px; display: flex; align-items: flex-end; padding: 10px 14px; color: #fff; font-weight: 700; font-size: 15px; }
.topic .cover.t1 { background: linear-gradient(120deg, #274a8c, #4f7fd8); }
.topic .cover.t2 { background: linear-gradient(120deg, #b4543a, #ff6b35); }
.topic .cover.t3 { background: linear-gradient(120deg, #167a56, #1a9e6c); }
.topic .count { font-size: 12px; font-weight: 400; opacity: .9; margin-left: 8px; }
.topic .links { padding: 10px 14px; font-size: 13px; }
.topic .links div { display: flex; justify-content: space-between; color: var(--color-text-secondary); padding: 4px 0; }
.topic .links .time { color: var(--color-text-muted); }
.rank-list { counter-reset: rank; }
.rank-item { display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 13px; }
.rank-item + .rank-item { border-top: 1px dashed var(--color-border); }
.rank-item .no { font-family: var(--font-num); font-weight: 800; width: 20px; color: var(--color-text-muted); flex: none; }
.rank-item:nth-child(-n+3) .no { color: #fff; background: var(--color-accent); border-radius: 5px; text-align: center; width: 20px; height: 20px; line-height: 20px; font-size: 12px; }
.rank-item .txt { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-item .views { color: var(--color-text-muted); font-size: 11px; flex: none; }
.ad-slot { position: relative; }
.ad {
  border: 1.5px dashed var(--color-border); border-radius: var(--radius); height: 220px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  color: var(--color-text-muted); font-size: 13px;
  background: repeating-linear-gradient(45deg, #fbfcfe, #fbfcfe 10px, #f6f8fc 10px, #f6f8fc 20px);
}

/* 时间轴 */
.timeline-section { margin-top: var(--space-6); background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: var(--space-6); }
.timeline-section h2 { font-size: 20px; font-weight: 800; margin-bottom: 4px; }
.timeline-section .sub { font-size: 13px; color: var(--color-text-secondary); margin-bottom: var(--space-5); }
.timeline { display: grid; grid-template-columns: repeat(var(--tl-cols, 8), minmax(0, 1fr)); gap: var(--space-3); }
.tl-node { position: relative; padding-top: 22px; }
.tl-node::before { content: ""; position: absolute; top: 6px; left: 0; right: 0; height: 3px; background: var(--color-border); border-radius: 2px; }
.tl-node::after { content: ""; position: absolute; top: 0; left: 0; width: 15px; height: 15px; border-radius: 50%; background: #fff; border: 4px solid var(--color-primary); }
.tl-node.hot::after { border-color: var(--color-accent); box-shadow: 0 0 0 4px rgba(255,107,53,.15); }
.tl-node .date { font-family: var(--font-num); font-size: 12px; color: var(--color-text-muted); }
.tl-node .name { font-size: 14px; font-weight: 600; margin-top: 2px; }
.tl-node .desc { font-size: 12px; color: var(--color-text-secondary); margin-top: 2px; }

/* 面包屑 */
.breadcrumb { font-size: 13px; color: var(--color-text-muted); margin-bottom: var(--space-4); }
.breadcrumb a { color: var(--color-primary); }
.breadcrumb .cur { color: var(--color-text-secondary); }

/* 频道页 */
.channel-hero {
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-5);
  background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  padding: var(--space-5) var(--space-6); margin-bottom: var(--space-4);
  border-left: 4px solid var(--color-primary);
}
.ch-title-row { display: flex; align-items: center; gap: 10px; margin-bottom: var(--space-2); }
.ch-name { font-size: 24px; font-weight: 800; }
.ch-count { background: var(--color-primary); color: #fff; border-radius: 999px; padding: 3px 12px; font-size: 12px; font-weight: 600; }
.ch-desc { font-size: 14px; color: var(--color-text-secondary); max-width: 620px; }
.ch-stats { display: flex; align-items: center; gap: var(--space-5); flex: none; }
.stat { text-align: center; }
.stat .num { font-family: var(--font-num); font-size: 26px; font-weight: 800; color: var(--color-primary); line-height: 1.2; }
.stat .label { font-size: 12px; color: var(--color-text-muted); }
.ch-sub { flex: none; }
.subfilters { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-4); flex-wrap: wrap; }
.subfilters a {
  border: 1px solid var(--color-border); background: #fff; color: var(--color-text-secondary);
  border-radius: 999px; padding: 7px 16px; font-size: 13px;
}
.subfilters a.on { background: var(--color-primary); border-color: var(--color-primary); color: #fff; font-weight: 600; }
.subfilters .sort { margin-left: auto; display: flex; gap: var(--space-2); font-size: 13px; color: var(--color-text-muted); }
.ch-list { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: 0 var(--space-5); }
.ch-post { display: flex; gap: var(--space-5); padding: var(--space-5) 0; }
.ch-post + .ch-post { border-top: 1px solid var(--color-border); }
.ch-post-body { flex: 1; min-width: 0; }
.ch-post-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--color-text-muted); margin-bottom: 8px; flex-wrap: wrap; }
.ch-post-meta .tag { color: var(--color-primary); background: var(--color-primary-light); border-radius: 4px; padding: 1px 8px; font-weight: 600; }
.ch-post-meta .new { background: var(--color-accent); color: #fff; border-radius: 4px; padding: 1px 6px; font-size: 11px; font-weight: 700; }
.ch-post-meta .src { color: var(--color-primary); }
.ch-post-title { font-size: 18px; font-weight: 700; line-height: 1.5; }
.ch-post-title:hover { color: var(--color-primary); }
.ch-post-desc { font-size: 13px; color: var(--color-text-secondary); margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.ch-post-foot { display: flex; gap: 12px; margin-top: 10px; font-size: 12px; color: var(--color-text-muted); }
.ch-post .thumb { width: 168px; height: 104px; border-radius: var(--radius-sm); flex: none; background: linear-gradient(135deg, #dfe7f7, #c6d5f0); position: relative; overflow: hidden; }
.ch-post .thumb::after { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(45deg, rgba(52,93,170,.08) 0 12px, transparent 12px 24px); }
.pagination { display: flex; align-items: center; gap: 6px; padding: var(--space-5) 0; }
.pagination a, .pagination span { min-width: 34px; height: 34px; line-height: 34px; text-align: center; border-radius: var(--radius-sm); font-size: 13px; color: var(--color-text-secondary); border: 1px solid var(--color-border); background: #fff; }
.pagination .cur { background: var(--color-primary); border-color: var(--color-primary); color: #fff; font-weight: 700; }
.pagination .more { border: none; }
.pagination .next { color: var(--color-primary); font-weight: 600; padding: 0 14px; }

/* 文章详情 */
.article-main { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: var(--space-6); }
.article-header h1 { font-size: 28px; font-weight: 800; line-height: 1.45; margin: var(--space-2) 0 var(--space-3); }
.article-meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--color-text-muted); flex-wrap: wrap; }
.article-meta .tag { color: var(--color-primary); background: var(--color-primary-light); border-radius: 4px; padding: 2px 10px; font-weight: 600; }
.article-meta .src { color: var(--color-primary); }
.lead-card {
  margin: var(--space-4) 0; padding: var(--space-4) var(--space-5);
  background: var(--color-primary-lighter); border-left: 4px solid var(--color-primary);
  border-radius: var(--radius); font-size: 15px; line-height: 1.75;
}
.lead-card .lead-label { font-size: 12px; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; display: block; }
.toc { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius); padding: var(--space-4) var(--space-5); margin-bottom: var(--space-5); font-size: 14px; }
.toc b { display: block; margin-bottom: 6px; }
.toc ol { padding-left: 22px; }
.toc a { color: var(--color-primary); }
.prose { font-size: 16px; line-height: 1.9; color: var(--color-text); }
.prose h2 { font-size: 21px; font-weight: 800; margin: var(--space-6) 0 var(--space-3); padding-bottom: 8px; border-bottom: 1px solid var(--color-border); }
.prose h3 { font-size: 17px; font-weight: 700; margin: var(--space-5) 0 var(--space-2); }
.prose p { margin: var(--space-3) 0; }
.prose ul, .prose ol { margin: var(--space-3) 0; padding-left: 24px; }
.prose li { margin: 4px 0; }
.prose table { width: 100%; border-collapse: collapse; margin: var(--space-4) 0; font-size: 14px; }
.prose th, .prose td { border: 1px solid var(--color-border); padding: 10px 12px; text-align: left; }
.prose th { background: var(--color-primary-lighter); font-weight: 700; }
.prose blockquote { margin: var(--space-4) 0; padding: var(--space-3) var(--space-4); background: var(--color-bg); border-left: 3px solid var(--color-text-muted); border-radius: var(--radius-sm); color: var(--color-text-secondary); font-size: 14px; }
.prose code { background: var(--color-bg); padding: 2px 6px; border-radius: 4px; font-size: 14px; }
.prose input[type="checkbox"] { margin-right: 6px; }
.h2-answer {
  margin: var(--space-3) 0; padding: var(--space-3) var(--space-4);
  background: #fffdf5; border: 1px solid #f3e6c9; border-radius: var(--radius);
  font-size: 15px; line-height: 1.8;
}
.evidence-box {
  margin: var(--space-5) 0; padding: var(--space-4) var(--space-5);
  background: var(--color-bg); border: 1px dashed var(--color-border); border-radius: var(--radius);
  font-size: 13px; color: var(--color-text-secondary);
}
.evidence-box b { color: var(--color-text); }
.related { margin-top: var(--space-6); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.related h2 { font-size: 18px; font-weight: 800; margin-bottom: var(--space-4); }
.related .c-item { padding: var(--space-3) 0; }

/* 问答 / 专题 / 时间轴 / 页面 */
.ask-list .ask-item { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: var(--space-5); margin-bottom: var(--space-4); }
.ask-item h2 { font-size: 18px; font-weight: 700; margin-bottom: var(--space-3); }
.ask-item h2::before { content: "Q "; color: var(--color-primary); }
.ask-item p { color: var(--color-text-secondary); font-size: 15px; }
.page-head { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: var(--space-5) var(--space-6); margin-bottom: var(--space-4); }
.page-head h1 { font-size: 26px; font-weight: 800; }
.page-head .sub { color: var(--color-text-secondary); font-size: 14px; margin-top: 6px; }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.topic-card { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); overflow: hidden; }
.topic-card .cover { height: 110px; display: flex; align-items: flex-end; padding: 16px; color: #fff; font-size: 18px; font-weight: 800; }
.topic-card .body { padding: var(--space-4) var(--space-5); }
.topic-card .desc { font-size: 13px; color: var(--color-text-secondary); margin-bottom: var(--space-3); }
.topic-card .links a { display: block; font-size: 14px; color: var(--color-text); padding: 6px 0; border-top: 1px dashed var(--color-border); }
.topic-card .links a:hover { color: var(--color-primary); }
.timeline-page .timeline-section { margin-top: 0; }
.page-prose { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: var(--space-6); }

/* 搜索页 */
.search-page .search-big { display: flex; gap: var(--space-2); margin-bottom: var(--space-5); }
.search-page .search-big input { flex: 1; padding: 14px 16px; border: 1px solid var(--color-border); border-radius: var(--radius); font-size: 15px; outline: none; }
.search-page .search-big button { padding: 14px 28px; background: var(--color-primary); color: #fff; border: none; border-radius: var(--radius); font-size: 15px; cursor: pointer; }
.search-result { background: var(--color-surface); border-radius: var(--radius); box-shadow: var(--shadow-card); padding: var(--space-4) var(--space-5); margin-bottom: var(--space-3); }
.search-result h2 { font-size: 16px; font-weight: 700; }
.search-result h2:hover { color: var(--color-primary); }
.search-result .meta { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }
.search-empty { text-align: center; color: var(--color-text-muted); padding: var(--space-6) 0; }

/* 404 */
.nf { text-align: center; padding: var(--space-7) 0; }
.nf .code { font-family: var(--font-num); font-size: 80px; font-weight: 800; color: var(--color-primary); line-height: 1.2; }
.nf p { color: var(--color-text-secondary); margin: var(--space-3) 0 var(--space-5); }

/* 页脚 */
.footer { background: #1c2a45; color: #c7d2e4; margin-top: var(--space-7); }
.footer .container { padding: var(--space-6) 24px var(--space-5); }
.footer-grid { display: flex; gap: var(--space-7); flex-wrap: wrap; }
.footer .col h4 { color: #fff; font-size: 15px; margin-bottom: var(--space-3); }
.footer .col a { display: block; font-size: 13px; color: #c7d2e4; padding: 3px 0; }
.footer .col a:hover { color: #fff; }
.footer .brand-block { max-width: 320px; }
.footer-logo { background: #fff; border-radius: 10px; padding: 8px 14px; display: inline-flex; }
.footer-logo-img { height: 40px; width: auto; }
.footer-slogan { color: #fff; font-weight: 700; font-size: 15px; margin-top: 12px; }
.footer .bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: var(--space-5); padding-top: var(--space-4); font-size: 12px; color: #8fa1bd; display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2); }
.demo-note { position: fixed; left: 16px; bottom: 16px; z-index: 50; background: rgba(28,42,69,.92); color: #fff; font-size: 12px; border-radius: 999px; padding: 8px 16px; box-shadow: var(--shadow-pop); }

/* 响应式 */
@media (max-width: 1024px) {
  .main-grid { grid-template-columns: 1fr; }
  .side { display: grid; grid-template-columns: 1fr 1fr; }
  .ad-slot { grid-column: 1 / -1; }
  .topic-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .header .container { flex-wrap: wrap; padding: 14px 16px; gap: 12px; }
  .search { order: 3; width: 100%; }
  .search input { width: 100%; }
  .nav .container { height: auto; flex-wrap: wrap; padding: 8px 16px; gap: 4px; }
  .nav-toggle { display: inline-block; }
  .nav .links { display: none; width: 100%; }
  .nav.open .links { display: flex; flex-wrap: wrap; }
  .nav a { height: 40px; line-height: 40px; padding: 0 12px; font-size: 14px; }
  .nav .spacer, .nav .timeline-link { display: none; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-card { min-height: 240px; }
  .hero-title { font-size: 21px; }
  .main-grid { margin-top: var(--space-4); }
  .channels { grid-template-columns: 1fr; }
  .channel-hero { flex-direction: column; align-items: flex-start; }
  .ch-stats { width: 100%; justify-content: space-between; }
  .subfilters { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 6px; }
  .subfilters .sort { margin-left: 0; }
  .ch-post .thumb { width: 112px; height: 80px; }
  .side { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: repeat(2, 1fr); row-gap: var(--space-5); }
  .timeline-section { padding: var(--space-5) var(--space-4); }
  .footer-grid { gap: var(--space-5); }
  .article-main, .page-prose { padding: var(--space-5) var(--space-4); }
  .article-header h1 { font-size: 22px; }
  .topic-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .topbar .right span:first-child { display: none; }
  .logo-img { height: 44px; }
  .brand-divider { height: 24px; }
  .brand-slogan { display: none; }
  .cta-btn { padding: 10px 14px; font-size: 13px; }
  .c-count { display: none; }
  .ch-post { gap: var(--space-3); }
  .ch-post-desc { display: none; }
  .ch-post-title { font-size: 16px; }
  .ch-stats .stat .num { font-size: 22px; }
  .pagination { flex-wrap: wrap; }
  .prose { font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}