/* ============================================
   v2 \u00b7 \u9662\u5fbd\u63a5\u5165\u4e0e\u5934\u90e8\u4e09\u65b9\u6848\u6837\u5f0f
   ============================================ */

/* \u4e09\u4e2a\u65b9\u6848\u9ed8\u8ba4\u5168\u90e8\u9690\u85cf\uff0c\u6839\u636e body[data-masthead] \u5207\u6362 */
.masthead-v2,
.masthead-centered,
.masthead-gov { display: none; }
body[data-masthead="classic"] .masthead-v2 { display: block; }
body[data-masthead="centered"] .masthead-centered { display: block; }
body[data-masthead="gov"] .masthead-gov { display: block; }

/* \u9690\u85cf\u539f\u59cb\u7684\u65e7 masthead\uff08\u5982\u679c\u5b58\u5728\uff09 */
body .masthead:not(.masthead-v2):not(.masthead-centered):not(.masthead-gov) { display: none; }

/* ============================================
   \u65b9\u6848 A \u00b7 classic\uff1a\u5de6\u5fbd\u53f3\u5bfc\u822a/\u641c\u7d22\uff08\u5b66\u9662\u98ce\uff09
   ============================================ */
.masthead-v2 {
  background: var(--bg-card);
  padding: 26px 0 22px;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.masthead-v2::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 92% 50%, color-mix(in oklch, var(--capest-blue) 8%, transparent), transparent 55%);
  pointer-events: none;
}
/* \u53f3\u4fa7\u9662\u5fbd\u6c34\u5370 */
.masthead-v2::after {
  content: "";
  position: absolute;
  right: -60px; top: 50%;
  transform: translateY(-50%);
  width: 240px; height: 240px;
  background: var(--emblem-url-512) center / contain no-repeat;
  opacity: 0.04;
  pointer-events: none;
}
.masthead-v2 .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  position: relative;
  z-index: 1;
}
.masthead-v2 .emblem-lockup .lockup-cn {
  font-size: 26px;
  letter-spacing: 4px;
}
.masthead-v2 .emblem-lockup .lockup-en {
  font-size: 10px;
  margin-top: 4px;
}
.masthead-v2 .masthead-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ============================================
   \u65b9\u6848 B \u00b7 centered\uff1a\u5fbd\u5fd7\u5c45\u4e2d\u5178\u793c
   ============================================ */
.masthead-centered {
  background: var(--bg-card);
  padding: 36px 0 30px;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  text-align: center;
}
.masthead-centered::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg,
      transparent 0 24px,
      color-mix(in oklch, var(--capest-blue) 1.5%, transparent) 24px 25px),
    radial-gradient(ellipse at 50% 0%, color-mix(in oklch, var(--capest-blue) 6%, transparent), transparent 55%);
  pointer-events: none;
}
.masthead-centered .wrap {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 100px 1fr 100px;
  align-items: center;
  gap: 20px;
}
.masthead-centered .centered-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.masthead-centered .centered-stack .emblem {
  margin-bottom: 6px;
  filter: drop-shadow(0 2px 0 rgba(0,0,0,0.04));
}
.masthead-centered .centered-cn {
  font-family: var(--f-serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 8px;
  color: var(--brand-deep);
  line-height: 1.2;
  padding-left: 8px; /* \u5e73\u8861\u8ddd\u79bb */
}
.masthead-centered .centered-en {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--fg-muted);
  margin-top: 2px;
}
.masthead-centered .centered-tag {
  font-family: var(--f-serif);
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--accent);
  display: flex;
  gap: 0;
  justify-content: center;
  margin-top: 8px;
}
.masthead-centered .centered-tag span {
  display: inline-block;
  padding: 0 4px;
}
.masthead-centered .centered-rule {
  height: 2px;
  background: linear-gradient(to right,
    transparent 0,
    var(--line-strong) 40%,
    var(--brand) 50%,
    var(--line-strong) 60%,
    transparent 100%);
  position: relative;
}
.masthead-centered .centered-rule::before,
.masthead-centered .centered-rule::after {
  content: "";
  position: absolute;
  top: -3px;
  width: 8px; height: 8px;
  background: var(--brand);
  border-radius: 50%;
}
.masthead-centered .centered-rule::before { left: 30%; }
.masthead-centered .centered-rule::after { right: 30%; }

.masthead-centered .centered-meta-l,
.masthead-centered .centered-meta-r {
  position: absolute;
  top: 36px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--fg-muted);
}
.masthead-centered .centered-meta-l {
  left: 24px;
  text-align: left;
}
.masthead-centered .centered-meta-l .k {
  color: var(--fg-sub);
  font-size: 9px;
  letter-spacing: 3px;
}
.masthead-centered .centered-meta-l .v {
  font-size: 18px;
  font-family: var(--f-serif);
  color: var(--brand-deep);
  font-weight: 700;
  line-height: 1;
  margin-top: 1px;
  letter-spacing: 1px;
}
.masthead-centered .centered-meta-r {
  right: 24px;
  text-align: right;
}
.masthead-centered .centered-meta-r a {
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 1px;
}
.masthead-centered .centered-meta-r a:hover { color: var(--brand); }
.masthead-centered .centered-search {
  margin-top: 14px;
  width: 200px;
  padding: 3px 3px 3px 12px;
  margin-left: auto;
}
.masthead-centered .centered-search input { font-size: 12px; }
.masthead-centered .centered-search button { width: 24px; height: 24px; }

/* ============================================
   \u65b9\u6848 C \u00b7 gov-deep\uff1a\u591c\u7a7a\u84dd\u653f\u52a1\u98ce
   ============================================ */
.masthead-gov {
  background:
    radial-gradient(ellipse at 90% 50%, color-mix(in oklch, var(--gold) 18%, transparent), transparent 50%),
    linear-gradient(135deg,
      var(--brand-deep) 0,
      color-mix(in oklch, var(--brand-deep) 70%, black) 100%);
  color: #fff;
  padding: 30px 0 26px;
  position: relative;
  overflow: hidden;
  border-bottom: 4px solid var(--gold);
}
.masthead-gov::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(135deg,
      rgba(255,255,255,0.02) 0 14px,
      rgba(255,255,255,0.05) 14px 28px);
  pointer-events: none;
}
.masthead-gov::after {
  content: "";
  position: absolute;
  right: 5%; top: 50%;
  transform: translateY(-50%);
  width: 200px; height: 200px;
  background: var(--emblem-url-white) center / contain no-repeat;
  opacity: 0.07;
  pointer-events: none;
}
.masthead-gov .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  position: relative;
  z-index: 1;
}
.masthead-gov .emblem-lockup .lockup-cn {
  color: #fff;
  font-size: 26px;
  letter-spacing: 4px;
}
.masthead-gov .emblem-lockup .lockup-en {
  color: rgba(255,255,255,0.55);
  font-size: 10px;
  margin-top: 4px;
}
.masthead-gov .gov-meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.masthead-gov .gov-stamp-area {
  text-align: right;
}
.masthead-gov .gov-tag-line {
  font-family: var(--f-serif);
  font-size: 18px;
  letter-spacing: 5px;
  color: var(--gold);
  font-weight: 600;
}
.masthead-gov .gov-meta-row {
  margin-top: 6px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 3px;
  color: rgba(255,255,255,0.55);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.masthead-gov .gov-meta-row .k {
  color: var(--gold);
  letter-spacing: 4px;
}
.masthead-gov .gov-search {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.25);
  width: 240px;
  position: relative;
}
.masthead-gov .gov-search input {
  color: #fff;
}
.masthead-gov .gov-search input::placeholder {
  color: rgba(255,255,255,0.5);
}
.masthead-gov .gov-search button {
  background: var(--gold);
  color: var(--brand-deep);
}
.masthead-gov .gov-search-help {
  position: absolute;
  top: 100%;
  right: 4px;
  margin-top: 6px;
  font-family: var(--f-mono);
  font-size: 10px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 1px;
}

/* ============================================
   \u9876\u90e8\u516c\u544a\u6761\u00b7\u5728 gov \u6a21\u5f0f\u4e0b\u53d8\u6df1\u8272
   ============================================ */
body[data-masthead="gov"] .topbar {
  background: color-mix(in oklch, var(--brand-deep) 92%, black);
  color: rgba(255,255,255,0.65);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
body[data-masthead="gov"] .topbar-left .date,
body[data-masthead="gov"] .topbar-left b {
  color: rgba(255,255,255,0.85) !important;
}
body[data-masthead="gov"] .topbar a {
  color: rgba(255,255,255,0.65);
}
body[data-masthead="gov"] .topbar a:hover {
  color: var(--gold);
}
body[data-masthead="gov"] .topbar .divider {
  color: rgba(255,255,255,0.2);
}

/* ============================================
   \u4e3b\u5bfc\u822a\u00b7\u9002\u914d\u4e09\u79cd\u5934\u90e8
   ============================================ */
/* \u5728 centered \u6a21\u5f0f\u4e0b\uff0c\u5bfc\u822a\u4e5f\u5e94\u8be5\u53d8\u4e0d\u540c\u4e00\u70b9 */
body[data-masthead="centered"] .mainnav {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  border-bottom: 2px solid var(--brand);
}
body[data-masthead="centered"] .mainnav li > a {
  color: var(--fg);
  line-height: 44px;
  font-weight: 500;
}
body[data-masthead="centered"] .mainnav li > a:hover,
body[data-masthead="centered"] .mainnav li.active > a {
  background: transparent;
  color: var(--brand-deep);
  box-shadow: inset 0 -3px 0 var(--accent);
}

/* ============================================
   \u9970\u9970\uff1a\u9876\u90e8\u516c\u544a\u6761 \u00b7 left \u6dfb\u52a0\u5fbd\u5fd7\u5c0f\u70b9
   ============================================ */
.topbar-left::before {
  content: "";
  display: inline-block;
  width: 14px; height: 14px;
  background: var(--emblem-url-512) center / contain no-repeat;
  margin-right: -4px;
  opacity: 0.7;
  vertical-align: middle;
}
body[data-masthead="gov"] .topbar-left::before {
  background-image: var(--emblem-url-white);
  opacity: 0.85;
}

/* ============================================
   Footer brand emblem-lockup \u8c03\u6574
   ============================================ */
.footer-brand .emblem-footer-lockup {
  margin-bottom: 4px;
}


/* ============================================
   Hero-block 印章定位
   ============================================ */
.hero-block .wrap { position: relative; }

/* ============================================
   Brand matrix · CACA 旗舰卡 添加院徽水印
   ============================================ */
.brand-item.featured {
  position: relative;
  overflow: hidden;
}
.brand-item.featured::after {
  content: "";
  position: absolute;
  right: -30px; bottom: -30px;
  width: 180px; height: 180px;
  background: var(--emblem-url-white) center / contain no-repeat;
  opacity: 0.08;
  pointer-events: none;
}

/* ============================================
   研究主线卡片 · hover 时浮现院徽角标
   ============================================ */
.research-card { position: relative; }
.research-card .corner-emblem {
  position: absolute;
  bottom: 14px; right: 14px;
  width: 22px; height: 22px;
  background: var(--emblem-url-512) center / contain no-repeat;
  opacity: 0;
  transition: 0.25s;
  pointer-events: none;
}
.research-card:hover .corner-emblem { opacity: 0.45; }

/* ============================================
   数据条 · 添加大背景院徽水印
   ============================================ */
.data-strip {
  position: relative;
  overflow: hidden;
}
.data-strip::before {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 320px; height: 320px;
  background: var(--emblem-url-512) center / contain no-repeat;
  opacity: 0.045;
  pointer-events: none;
  z-index: 0;
}
.data-strip .wrap { position: relative; z-index: 1; }

/* ============================================
   党建卡 · 替换右上 ★ 为院徽（白色）
   ============================================ */
.party-card { overflow: hidden; }
.party-card::before {
  content: "" !important;
  position: absolute;
  top: -20px; right: -20px;
  width: 200px !important; height: 200px !important;
  background: var(--emblem-url-white) center / contain no-repeat !important;
  opacity: 0.12 !important;
  font-size: 0 !important;
  color: transparent !important;
  line-height: 0 !important;
}

/* ============================================
   体能说·节目专区 加入超大型院徽水印作为底纹
   ============================================ */
.tineng-shuo { position: relative; }
.tineng-shuo::after {
  content: "";
  position: absolute;
  right: -120px; top: 50%;
  transform: translateY(-50%);
  width: 480px; height: 480px;
  background: var(--emblem-url-white) center / contain no-repeat;
  opacity: 0.05;
  pointer-events: none;
  z-index: 0;
}
.tineng-shuo > .wrap { position: relative; z-index: 1; }

/* ============================================
   Topbar fix · 让左侧 flex 行内居中（emblem 小点已加）
   ============================================ */
.topbar-left { display: flex; align-items: center; gap: 14px; }

/* ============================================
   头条 (.headlines) 顶部 · 加 emblem 装饰
   ============================================ */
.headlines {
  position: relative;
  overflow: hidden;
}
.headlines::before {
  content: "";
  position: absolute;
  bottom: -40px; right: -40px;
  width: 160px; height: 160px;
  background: var(--emblem-url-512) center / contain no-repeat;
  opacity: 0.04;
  pointer-events: none;
}

/* ============================================
   logo-mark（旧版）兼容隐藏
   ============================================ */
.logo-mark { display: none !important; }


/* ============================================
   v2 视觉精修 · Visual Polish Pass
   ============================================ */

/* ---------- Topbar：精致化 ---------- */
.topbar {
  background:
    linear-gradient(to right,
      var(--bg-alt) 0,
      color-mix(in oklch, var(--brand) 4%, var(--bg-alt)) 50%,
      var(--bg-alt) 100%);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 1px;
}
.topbar .weather { color: var(--accent); font-weight: 500; }
.topbar-right a {
  position: relative;
  padding: 0 2px;
  transition: 0.2s;
}
.topbar-right a:hover {
  color: var(--brand-deep);
}
.topbar-right a:hover::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--brand);
}

/* ---------- 占位图：去重复条纹，改为细网格底纹 ---------- */
.placeholder {
  background-color: var(--bg-card) !important;
  background-image:
    linear-gradient(to right,
      color-mix(in oklch, var(--brand) 7%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom,
      color-mix(in oklch, var(--brand) 7%, transparent) 1px, transparent 1px),
    linear-gradient(135deg,
      color-mix(in oklch, var(--brand) 5%, var(--bg-card)) 0,
      var(--bg-card) 100%) !important;
  background-size: 32px 32px, 32px 32px, auto !important;
  background-position: 0 0, 0 0, 0 0 !important;
  background-repeat: repeat, repeat, no-repeat !important;
  position: relative;
}
.placeholder::after {
  content: "";
  position: absolute;
  right: -30px; bottom: -30px;
  width: 200px; height: 200px;
  background: var(--emblem-url-512) center / contain no-repeat;
  opacity: 0.07;
  pointer-events: none;
}
.placeholder::before { display: none; }
.placeholder span {
  background: var(--bg-card);
  border: 1px solid var(--line-strong);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--fg-muted);
  padding: 6px 14px;
  box-shadow: 0 2px 0 var(--line-strong);
}

/* ---------- 数据条：改为深色 + 大数字 + 院徽水印 + 院训装饰条 ---------- */
.data-strip {
  background:
    radial-gradient(ellipse at 80% 30%, color-mix(in oklch, var(--gold) 18%, transparent), transparent 50%),
    linear-gradient(135deg, var(--brand-deep) 0, color-mix(in oklch, var(--brand-deep) 75%, black) 100%);
  color: #fff;
  padding: 56px 0 50px;
  position: relative;
  border-top: 4px solid var(--gold);
  border-bottom: 1px solid color-mix(in oklch, var(--brand-deep) 50%, black);
}
.data-strip::after {
  content: "用 科 学 铸 能 · 以 智 能 强 体";
  position: absolute;
  top: 14px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--f-serif);
  font-size: 11px;
  letter-spacing: 6px;
  color: var(--gold);
  opacity: 0.85;
}
.data-strip .data-grid {
  position: relative;
  z-index: 1;
}
.data-strip .data-item {
  position: relative;
  padding: 8px 0;
}
.data-strip .data-item + .data-item::before {
  content: "";
  position: absolute;
  left: 0; top: 20%;
  width: 1px; height: 60%;
  background: linear-gradient(to bottom,
    transparent 0,
    rgba(255,255,255,0.18) 50%,
    transparent 100%);
}
.data-strip .data-item .num {
  color: #fff !important;
  font-family: var(--f-serif);
  font-size: 44px !important;
  font-weight: 700;
  line-height: 1;
}
.data-strip .data-item .num .unit {
  color: var(--gold);
  font-size: 16px;
  margin-left: 4px;
  font-weight: 400;
}
.data-strip .data-item .label {
  color: rgba(255,255,255,0.7) !important;
  font-size: 12px !important;
  letter-spacing: 2px;
  margin-top: 8px;
}

/* ---------- 党建卡：换深红 + 旗帜纹理 ---------- */
.party-card {
  background:
    radial-gradient(ellipse at 100% 0%,
      color-mix(in oklch, var(--accent) 30%, transparent), transparent 60%),
    linear-gradient(135deg,
      var(--accent) 0,
      color-mix(in oklch, var(--accent) 70%, black) 100%) !important;
  color: #fff !important;
  position: relative;
  overflow: hidden;
}
.party-card h3 {
  color: #fff !important;
  font-family: var(--f-serif);
  font-size: 22px;
  letter-spacing: 4px;
}
.party-card .en {
  color: rgba(255,255,255,0.55);
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 3px;
  margin-top: 4px;
}
.party-card ul li {
  color: rgba(255,255,255,0.92) !important;
  border-bottom-color: rgba(255,255,255,0.15) !important;
  font-size: 12.5px;
  padding: 8px 0;
}
.party-card ul li .date { color: rgba(255,255,255,0.5); }

/* ---------- 国际合作 globe 视觉重做 ---------- */
.coop-card .coop-globe {
  position: relative;
  height: 140px;
  margin: 14px 0 18px;
  background:
    radial-gradient(circle at 50% 50%, transparent 38%, color-mix(in oklch, var(--brand) 8%, transparent) 38%, color-mix(in oklch, var(--brand) 8%, transparent) 39%, transparent 39%),
    radial-gradient(circle at 50% 50%, transparent 60%, color-mix(in oklch, var(--brand) 6%, transparent) 60%, color-mix(in oklch, var(--brand) 6%, transparent) 61%, transparent 61%),
    radial-gradient(circle at 50% 50%, transparent 80%, color-mix(in oklch, var(--brand) 4%, transparent) 80%, color-mix(in oklch, var(--brand) 4%, transparent) 81%, transparent 81%);
  border-radius: 50%;
  overflow: hidden;
}
.coop-card .coop-globe::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, transparent 49.5%, color-mix(in oklch, var(--brand) 8%, transparent) 50%, transparent 50.5%),
    linear-gradient(to bottom, transparent 49.5%, color-mix(in oklch, var(--brand) 8%, transparent) 50%, transparent 50.5%);
}
.coop-card .city {
  position: absolute;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--fg);
  background: var(--bg-card);
  border: 1px solid var(--line-strong);
  padding: 3px 8px;
  white-space: nowrap;
}
.coop-card .city::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
  box-shadow: 0 0 0 2px color-mix(in oklch, var(--accent) 30%, transparent);
}
.coop-card .city.xm { left: 35%; top: 55%; border-color: var(--accent); color: var(--accent); font-weight: 500; }
.coop-card .city.sg { right: 8%; top: 75%; }
.coop-card .city.tk { right: 8%; top: 30%; }
.coop-card .city.sv { left: 5%; top: 30%; }

/* ---------- 招聘卡：列表样式精修 ---------- */
.jobs-card .jobs-list li {
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-card);
  padding: 12px 14px !important;
  margin-bottom: 8px;
  transition: 0.2s;
  border-left: 3px solid var(--brand);
}
.jobs-card .jobs-list li:hover {
  border-left-color: var(--accent);
  background: var(--brand-wash);
  transform: translateX(2px);
}
.jobs-card .jobs-list li .job-title {
  font-weight: 600;
  font-size: 14px;
}
.jobs-card .jobs-list li .job-meta {
  font-family: var(--f-mono);
  font-size: 10.5px;
  color: var(--fg-muted);
  margin-top: 3px;
  letter-spacing: 1px;
}
.jobs-card .jobs-list li .count {
  /* 固定浅蓝色 (hsl 含义：色相 220 蓝、饱和度低、亮度高 ≈ 学院蓝淡彩) */
  background: hsl(212, 55%, 94%);
  color: hsl(215, 60%, 32%);
  border: 1px solid hsl(212, 50%, 80%);
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  font-family: var(--f-mono);
  letter-spacing: 1.5px;
  border-radius: 2px;
  white-space: nowrap;
}
.jobs-card .jobs-list li:hover .count {
  background: hsl(212, 60%, 88%);
  border-color: hsl(212, 55%, 65%);
  color: hsl(215, 70%, 25%);
}

/* ---------- topics-grid：banner 重做 ---------- */
.topic-banner {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  isolation: isolate;
}
.topic-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0.95;
  z-index: -1;
  transition: 0.4s;
}
.topic-banner:hover::before { transform: scale(1.06); }

.topic-banner.t-cold::before {
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.25), transparent 40%),
    repeating-linear-gradient(45deg,
      oklch(0.85 0.06 220) 0 12px,
      oklch(0.78 0.08 220) 12px 24px),
    linear-gradient(135deg, oklch(0.7 0.1 220), oklch(0.5 0.13 230));
}
.topic-banner.t-ai::before {
  background:
    radial-gradient(circle at 70% 30%, oklch(0.7 0.18 290 / 0.4), transparent 50%),
    linear-gradient(135deg,
      oklch(0.35 0.1 280) 0,
      oklch(0.25 0.15 270) 50%,
      oklch(0.2 0.12 250) 100%);
}
.topic-banner.t-ai::after {
  content: "010 1101 0010 0011 1110";
  position: absolute;
  bottom: 30%;
  left: 12px;
  font-family: var(--f-mono);
  font-size: 10px;
  color: rgba(0,255,200,0.4);
  letter-spacing: 2px;
}
.topic-banner.t-youth::before {
  background:
    radial-gradient(circle at 70% 70%, rgba(255,200,0,0.3), transparent 50%),
    linear-gradient(135deg,
      oklch(0.75 0.15 60) 0,
      oklch(0.6 0.18 50) 100%);
}
.topic-banner.t-judge::before {
  background:
    repeating-linear-gradient(90deg,
      oklch(0.25 0.05 30) 0 30px,
      oklch(0.3 0.08 30) 30px 31px),
    linear-gradient(135deg,
      oklch(0.4 0.15 20) 0,
      oklch(0.25 0.13 25) 100%);
}
.topic-banner .t1 {
  color: #fff;
  font-family: var(--f-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 4px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.35);
}
.topic-banner .t2 {
  color: rgba(255,255,255,0.7);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 3px;
  margin-top: 6px;
  text-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

/* ---------- 友情链接：更典雅 ---------- */
.friend-links {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  padding: 28px 0;
}
.friend-links h4 {
  font-family: var(--f-serif);
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--brand-deep);
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.friend-links h4::before {
  content: "";
  display: inline-block;
  width: 18px; height: 18px;
  background: var(--emblem-url-512) center / contain no-repeat;
  opacity: 0.7;
}
.friend-links ul li {
  color: var(--fg-muted);
  font-size: 12px;
  padding: 4px 14px;
  border-right: 1px solid var(--line-strong);
  cursor: pointer;
  transition: 0.2s;
}
.friend-links ul li:last-child { border-right: 0; }
.friend-links ul li:hover { color: var(--brand); }

/* ---------- 视频中心：tile 改进 ---------- */
.video-tile {
  border: 1px solid var(--line);
  background: var(--bg-card);
  transition: 0.25s;
  position: relative;
}
.video-tile:hover {
  border-color: var(--brand);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -10px color-mix(in oklch, var(--brand) 50%, transparent);
}
.video-tile .thumb {
  position: relative;
}
.video-tile .thumb::after {
  content: "▶";
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 44px; height: 44px;
  display: grid; place-items: center;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border-radius: 50%;
  font-size: 14px;
  pointer-events: none;
  transition: 0.25s;
}
.video-tile:hover .thumb::after {
  background: var(--accent);
  transform: translate(-50%, -50%) scale(1.1);
}
.video-tile .dur {
  background: rgba(0,0,0,0.75);
  color: #fff;
  position: absolute;
  bottom: 8px; right: 8px;
  font-family: var(--f-mono);
  font-size: 11px;
  padding: 2px 6px;
  border: 0;
  letter-spacing: 1px;
}
.video-tile .info {
  padding: 12px 14px;
}
.video-tile .info .t {
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--fg);
}
.video-tile .info .m {
  font-family: var(--f-mono);
  font-size: 10.5px;
  color: var(--fg-muted);
  margin-top: 6px;
  letter-spacing: 1px;
}

/* ---------- 专家卡片：精修 ---------- */
.expert-card {
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-card);
  transition: 0.25s;
}
.expert-card:hover {
  border-color: var(--brand);
  box-shadow: 0 6px 16px -8px color-mix(in oklch, var(--brand) 60%, transparent);
}
.expert-card .avatar {
  background:
    radial-gradient(circle at 30% 30%,
      color-mix(in oklch, var(--brand) 30%, var(--bg-alt)) 0,
      var(--bg-alt) 100%);
  color: var(--brand-deep);
  font-family: var(--f-serif);
  font-weight: 600;
  border: 1px solid var(--line-strong);
}

/* ---------- News-list 微调：日期更弱 + hover 更细腻 ---------- */
.news-list li {
  transition: 0.2s;
}
.news-list li:hover {
  background: linear-gradient(to right,
    var(--brand-wash) 0,
    transparent 100%);
  padding-left: 6px;
}
.news-list li .date {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--fg-sub);
}

/* ---------- 头条 (.headlines) 细节 ---------- */
.headlines .lead {
  position: relative;
  padding: 16px 18px;
  background:
    linear-gradient(135deg,
      var(--brand-wash) 0,
      transparent 60%);
  border-left: 3px solid var(--accent);
  margin-bottom: 14px;
}
.headlines .lead .kicker {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 3px;
  color: var(--accent);
  font-weight: 500;
}
.headlines .lead h3 {
  font-family: var(--f-serif);
  font-size: 17px;
  line-height: 1.55;
  margin: 8px 0;
  color: var(--fg);
}
.headlines .lead h3 a:hover { color: var(--brand); }
.headlines .lead p {
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--fg-muted);
}

/* ---------- 主导航：active 状态强化 ---------- */
.mainnav li.active > a {
  color: var(--gold);
  position: relative;
}
.mainnav li.active > a::after {
  content: "";
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 32px; height: 3px;
  background: var(--gold);
}

/* ---------- 体能说·tineng-shuo 头部装饰 ---------- */
.tineng-shuo .tineng-header h2.serif {
  font-family: var(--f-serif);
  font-size: 38px;
  letter-spacing: 12px;
  color: #fff;
  font-weight: 700;
}
.tineng-shuo .tineng-header h2.serif .quote {
  color: var(--gold);
  font-size: 48px;
  vertical-align: -8px;
  font-weight: 400;
  margin: 0 4px;
}
.tineng-shuo .tineng-header .sub {
  color: rgba(255,255,255,0.45);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 5px;
  margin-top: 8px;
}