/* ==========================================================
   后台框架层
   左侧固定导航 + 顶部栏 + 内容区（卡片网格）
   在 style.css 之后加载，负责覆盖共享组件的观感
   ========================================================== */

/* ---------- 骨架 ---------- */
.admin-shell {
  display: flex;
  min-height: 100vh;
  background: var(--bg);
}

/* ---------- 左侧导航 ---------- */
.admin-side {
  width: var(--side-w);
  flex: none;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: #fff;
  border-right: 1px solid var(--border);
  z-index: 60;
}

.admin-side-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  flex: none;
  text-decoration: none;
  color: var(--text);
}
.admin-side-brand:hover { color: var(--text); }

.admin-side-brand .logo {
  width: 30px; height: 30px;
  flex: none;
  border-radius: 7px;
  display: grid; place-items: center;
  background: linear-gradient(140deg, #2d7ff9, #1668dc);
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.admin-side-brand .nm {
  min-width: 0;
  line-height: 1.25;
}
.admin-side-brand .nm b {
  display: block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .01em;
}
.admin-side-brand .nm span {
  display: block;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.admin-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px 8px 14px;
}
.admin-nav::-webkit-scrollbar { width: 6px; }

.admin-nav-group { margin-top: 12px; }
.admin-nav-group:first-child { margin-top: 2px; }

.admin-nav-label {
  font-size: 11px;
  color: var(--faint);
  letter-spacing: .06em;
  padding: 6px 10px;
  font-weight: 600;
}

.admin-nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 8px 10px;
  margin-bottom: 1px;
  border: 0;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--text-2);
  font-size: 13.5px;
  text-align: left;
  cursor: pointer;
  text-decoration: none;
  transition: background .14s, color .14s;
}
.admin-nav-item:hover { background: var(--surface-3); color: var(--text); }
.admin-nav-item.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

.admin-nav-item .ico {
  width: 17px;
  flex: none;
  text-align: center;
  font-size: 14px;
  opacity: .92;
}
.admin-nav-item .txt {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.admin-nav-item .n {
  flex: none;
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  padding: 0 2px;
}
.admin-nav-item.active .n { color: var(--primary); }

/* 导航里的进度小条 */
.admin-nav-progress {
  margin: 10px 10px 2px;
  padding: 11px 12px;
  border-radius: var(--r-sm);
  background: var(--surface-3);
}
.admin-nav-progress .ph {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--muted);
  margin-bottom: 7px;
}
.admin-nav-progress .ph b {
  font-size: 15px;
  color: var(--text);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.admin-nav-progress .track {
  height: 5px;
  border-radius: 99px;
  background: #e3e7ee;
  overflow: hidden;
}
.admin-nav-progress .track i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--primary);
  transition: width .8s cubic-bezier(.2, .8, .2, 1);
}

/* 侧栏里的「境界」块（钉在 nav 与页脚之间，不随 nav 滚动） */
.realm-nav { flex: none; margin: 8px 10px 0; }
.realm-nav .ph .rz-name {
  font-style: normal;
  font-weight: 700;
  font-size: 12.5px;
  color: var(--text);
  letter-spacing: .02em;
}
.realm-nav .ph b em { font-style: normal; font-weight: 500; font-size: 11.5px; color: var(--muted); }
.realm-nav .track i { background: linear-gradient(90deg, #3f56e0, #8b5cf6); }
.nav-realm-hint {
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--muted);
}
.nav-realm-hint b { color: var(--text-2); font-weight: 700; }

/* ==========================================================
   修炼境界（仪表盘）
   ========================================================== */
.realm-now { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.realm-main { flex: 1; min-width: 0; }
.realm-title { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 5px; }
.realm-title b { font-size: 19px; font-weight: 700; color: var(--text); letter-spacing: -.01em; }
.realm-title span { font-size: 12.5px; color: var(--muted); }
.realm-nums {
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--muted); margin-bottom: 9px;
}
.realm-nums b { font-size: 14px; color: var(--text); font-variant-numeric: tabular-nums; }
.realm-sep { width: 1px; height: 11px; background: var(--border-strong); }
.realm-bar { height: 6px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.realm-bar i {
  display: block; height: 100%; width: 0; border-radius: inherit;
  background: linear-gradient(90deg, #3f56e0, #8b5cf6);
  transition: width .9s cubic-bezier(.2, .8, .2, 1);
}

/* 展开按钮 */
.realm-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  margin: 2px 0 10px;
  padding: 6px 12px;
  font-size: 12.5px; font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid var(--primary-line);
  border-radius: 99px;
  cursor: pointer;
  transition: background .16s, box-shadow .16s, transform .16s;
}
.realm-toggle:hover { background: #e2e8ff; box-shadow: 0 3px 10px rgba(63, 86, 224, .14); transform: translateY(-1px); }
.realm-toggle .rt-arrow { font-style: normal; font-size: 11px; transition: transform .25s; }
.realm-toggle[aria-expanded="true"] .rt-arrow { transform: rotate(180deg); }

/* 收起 / 展开容器 */
.realm-ladder-wrap { display: none; }
.realm-ladder-wrap.open { display: flex; flex-direction: column; gap: 6px; animation: rise .3s ease both; }

/* 阶梯：一行一个大境界（行首竖排名称），行内 4 个小境界 */
.realm-ladder { display: flex; flex-direction: column; gap: 6px; }

.rl-row { display: flex; align-items: stretch; gap: 8px; }

.rl-realm {
  flex: none; width: 56px;
  display: grid; place-items: center;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.rl-realm b {
  writing-mode: vertical-rl;                 /* 竖排，像书脊 */
  font-size: 13.5px; font-weight: 700; letter-spacing: .3em;
  color: var(--text-2);
}
.rl-row.done .rl-realm { border-color: var(--imp-key-line); background: var(--imp-key-soft); }
.rl-row.done .rl-realm b { color: var(--imp-key); }
.rl-row.cur .rl-realm {
  border-color: transparent;
  background: linear-gradient(160deg, #6b7cff, #3f56e0 65%, #8b5cf6);
  box-shadow: 0 4px 12px rgba(63, 86, 224, .24);
}
.rl-row.cur .rl-realm b { color: #fff; }
.rl-row.todo .rl-realm { opacity: .62; }

.rl-subs { flex: 1; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }

.rl {
  position: relative;
  padding: 9px 4px 7px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  text-align: center;
  transition: transform .16s, box-shadow .16s;
}
.rl b { display: block; font-size: 12.5px; font-weight: 700; color: var(--text-2); letter-spacing: .02em; }
.rl span { display: block; font-size: 10.5px; color: var(--faint); font-variant-numeric: tabular-nums; margin-top: 2px; }
.rl.done { border-color: var(--imp-key-line); background: var(--imp-key-soft); }
.rl.done b { color: var(--imp-key); }
.rl.done span { color: var(--imp-key); opacity: .75; }
.rl.todo { opacity: .58; }
.rl.cur {
  border-color: transparent;
  background: linear-gradient(140deg, #6b7cff, #3f56e0 60%, #8b5cf6);
  box-shadow: 0 6px 16px rgba(63, 86, 224, .26);
}
.rl.cur b { color: #fff; }
.rl.cur span { color: rgba(255, 255, 255, .82); }
.rl-flag {
  position: absolute; top: -8px; left: 50%; transform: translateX(-50%);
  font-size: 10px; line-height: 1.6; padding: 0 6px; border-radius: 99px;
  background: var(--text); color: #fff; white-space: nowrap;
}

@media (max-width: 640px) {
  .rl-row { flex-wrap: wrap; }
  .rl-realm { width: 100%; padding: 5px 0; }
  .rl-realm b { writing-mode: horizontal-tb; letter-spacing: .2em; text-indent: .2em; }
}

.admin-side-foot {
  flex: none;
  border-top: 1px solid var(--border);
  padding: 9px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.admin-side-foot .ver {
  font-size: 11.5px;
  color: var(--faint);
  margin-left: auto;
}

/* ---------- 主内容列 ---------- */
.admin-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.admin-top {
  height: var(--top-h);
  flex: none;
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 18px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.crumb {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  color: var(--muted);
  min-width: 0;
}
.crumb .sep { color: var(--faint); }
.crumb b { color: var(--text); font-weight: 600; }
.crumb .back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-2);
  text-decoration: none;
}
.crumb .back:hover { color: var(--primary); }

.admin-top-spacer { flex: 1; }

.admin-top-stat {
  display: flex;
  align-items: center;
  gap: 13px;
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}
.admin-top-stat b {
  color: var(--text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.admin-top-stat .divider {
  width: 1px; height: 14px;
  background: var(--border-strong);
}

.admin-body {
  flex: 1;
  width: 100%;
  max-width: 1640px;
  padding: 16px 18px 30px;
}

/* 移动端汉堡按钮（桌面隐藏） */
.admin-burger {
  display: none;
  width: 32px; height: 32px;
  flex: none;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: #fff;
  color: var(--text-2);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
}
.admin-burger:hover { border-color: var(--border-strong); color: var(--text); }

.admin-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(15, 20, 30, .35);
}

/* ==========================================================
   仪表盘组件
   ========================================================== */

/* ---------- 顶部横幅（背景图只露出中间一条，缩放比小 → 更锐利） ---------- */
.dash-hero {
  position: relative;
  min-height: 174px;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: #10192b;
  display: flex;
  align-items: center;
  padding: 24px 28px;
  margin-bottom: 14px;
  border: 1px solid var(--border);
}

.dash-hero-img {
  position: absolute;
  inset: 0;
  /* 直接复用 Backdrop 写入的 --cover-image，换图后横幅自动跟着变 */
  background-image: var(--cover-image, none);
  background-size: cover;
  background-position: center var(--hero-pos, 34%);
  background-repeat: no-repeat;
  background-color: #10192b;
  transform: scale(1.01);
}

.dash-hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(100deg, rgba(9, 15, 28, .90) 0%, rgba(9, 15, 28, .74) 38%, rgba(9, 15, 28, .40) 72%, rgba(9, 15, 28, .28) 100%),
    linear-gradient(180deg, rgba(9, 15, 28, .12), rgba(9, 15, 28, .42));
}

.dash-hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 30px;
  width: 100%;
  flex-wrap: wrap;
}

.dash-hero-txt { flex: 1; min-width: 0; color: #fff; }

.dash-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .74);
  margin-bottom: 10px;
}
.dash-hero-eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #46d6a0;
  box-shadow: 0 0 0 3px rgba(70, 214, 160, .22);
}

.dash-hero h1 {
  font-size: 27px;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.2;
  margin-bottom: 7px;
}
.dash-hero p {
  font-size: 13.5px;
  line-height: 1.68;
  color: rgba(255, 255, 255, .78);
  margin: 0 0 15px;
  max-width: 640px;
}
.dash-hero-actions { display: flex; gap: 9px; flex-wrap: wrap; }

.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background .16s, border-color .16s, color .16s;
}
.btn-hero.solid { background: #fff; color: #14213a; }
.btn-hero.solid:hover { background: #eef3ff; color: #14213a; }
.btn-hero.line {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .3);
  color: #fff;
}
.btn-hero.line:hover { background: rgba(255, 255, 255, .22); color: #fff; }

/* 横幅右侧的三个小指标 */
.dash-hero-kpi {
  display: flex;
  gap: 10px;
  flex: none;
  flex-wrap: wrap;
}
.hero-kpi {
  min-width: 86px;
  padding: 11px 14px;
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .16);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  text-align: left;
}
.hero-kpi b {
  display: block;
  font-size: 21px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.02em;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}
.hero-kpi span {
  display: block;
  font-size: 11.5px;
  color: rgba(255, 255, 255, .66);
  margin-top: 2px;
}

/* ---------- 统计卡片行（截图的核心元素） ---------- */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.s-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 15px 17px 13px;
  transition: border-color .16s, box-shadow .16s;
}
.s-card:hover { border-color: var(--border-strong); box-shadow: var(--sh-1); }

.s-card-top {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.s-card-main { flex: 1; min-width: 0; }
.s-card-num {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -.025em;
  line-height: 1.12;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.s-card-label {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 5px;
}
.s-card-badge {
  flex: none;
  font-size: 11.5px;
  line-height: 1.5;
  padding: 1px 7px;
  border-radius: var(--r-xs);
  background: var(--surface-3);
  color: var(--muted);
  white-space: nowrap;
}
.s-card-badge.blue { background: var(--primary-soft); color: var(--primary); }
.s-card-badge.green { background: var(--easy-soft); color: var(--easy); }
.s-card-badge.amber { background: var(--medium-soft); color: var(--medium); }
.s-card-badge.red { background: var(--hard-soft); color: var(--hard); }

.s-card-sub {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  padding-top: 11px;
  border-top: 1px solid var(--border);
}
.s-sub {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 12.5px;
  color: var(--muted);
}
.s-sub b {
  color: var(--text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.s-sub b.easy { color: var(--easy); }
.s-sub b.medium { color: var(--medium); }
.s-sub b.hard { color: var(--hard); }

/* 进度条（卡片内） */
.s-card-bar {
  margin-top: 11px;
  height: 5px;
  border-radius: 99px;
  background: #eceff4;
  overflow: hidden;
}
.s-card-bar i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--primary);
  transition: width .9s cubic-bezier(.2, .8, .2, 1);
}

/* ---------- 通用卡（截图那种带标题栏的面板） ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}
.card + .card { margin-top: 12px; }

.card-head {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 7px;
}
.card-title::before {
  content: "";
  width: 3px; height: 13px;
  border-radius: 2px;
  background: var(--primary);
}
.card-tag {
  font-size: 11.5px;
  line-height: 1.6;
  padding: 1px 7px;
  border-radius: var(--r-xs);
  background: var(--medium-soft);
  color: var(--medium);
  font-weight: 500;
}
.card-tag.blue { background: var(--primary-soft); color: var(--primary); }
.card-tag.plain { background: var(--surface-3); color: var(--muted); }
.card-tag.purple { background: #f3ecff; color: #6d3fc4; }
.card-head-spacer { flex: 1; }
.card-link {
  font-size: 12.5px;
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
  background: none;
  border: 0;
  padding: 0;
}
.card-link:hover { text-decoration: underline; }
.card-body { padding: 8px; }
.card-body.pad { padding: 15px 16px; }
.card-body.flush { padding: 0; }

/* ---------- 两栏 ---------- */
.dash-cols {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}
.dash-cols-2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

/* ---------- 圆点列表（截图左侧公告那种） ---------- */
.feed { display: flex; flex-direction: column; }
.feed-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 9px;
  border-radius: var(--r-sm);
  text-decoration: none;
  color: inherit;
  transition: background .14s;
}
a.feed-item:hover, button.feed-item:hover { background: var(--surface-3); }
.feed-item + .feed-item { border-top: 1px solid var(--border); border-radius: 0; }
.feed-dot {
  width: 7px; height: 7px;
  flex: none;
  border-radius: 50%;
  margin-top: 6px;
  background: var(--faint);
}
.feed-dot.blue { background: var(--primary); }
.feed-dot.green { background: var(--easy); }
.feed-dot.amber { background: var(--medium); }
.feed-dot.red { background: var(--hard); }
.feed-dot.violet { background: #7c5cf0; }

.feed-main { flex: 1; min-width: 0; }
.feed-title {
  font-size: 13.5px;
  color: var(--text);
  line-height: 1.55;
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
}
.feed-meta {
  font-size: 12px;
  color: var(--faint);
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}
.feed-right {
  flex: none;
  font-size: 12.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  padding-top: 1px;
}
.feed-right b { color: var(--text); font-weight: 600; }

/* 列表项里的小标记 */
.pill {
  font-size: 11px;
  line-height: 1.6;
  padding: 0 6px;
  border-radius: var(--r-xs);
  font-weight: 500;
}
.pill.red { background: var(--hard-soft); color: var(--hard); }
.pill.blue { background: var(--primary-soft); color: var(--primary); }
.pill.green { background: var(--easy-soft); color: var(--easy); }
.pill.amber { background: var(--medium-soft); color: var(--medium); }
.pill.plain { background: var(--surface-3); color: var(--muted); }

/* ---------- 板块卡（浅色版） ---------- */
.board-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
  gap: 12px;
}
.bcard {
  position: relative;
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 15px 17px 14px;
  text-decoration: none;
  color: inherit;
  transition: border-color .16s, box-shadow .16s, transform .16s;
}
.bcard:hover {
  border-color: var(--primary-line);
  box-shadow: var(--sh-2);
  color: inherit;
  transform: translateY(-1px);
}
.bcard-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
  margin-bottom: 4px;
}
.bcard-name .ico {
  width: 22px; height: 22px;
  flex: none;
  border-radius: var(--r-xs);
  display: grid; place-items: center;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
}
.bcard-desc {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.6;
  min-height: 20px;
  margin-bottom: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bcard-foot {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--muted);
}
.bcard-foot .n {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.bcard-foot .dots { display: inline-flex; gap: 4px; margin-left: auto; }
.bcard-foot .dots i {
  width: 6px; height: 6px;
  border-radius: 50%;
  display: block;
}

/* ---------- 面试必看 · 重要程度卡片 ---------- */
.imp-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
@media (max-width: 1000px) { .imp-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.icard {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--muted);
  border-radius: var(--r);
  padding: 13px 15px 12px;
  text-decoration: none;
  color: inherit;
  transition: border-color .16s, box-shadow .16s, transform .16s;
}
.icard:hover { box-shadow: var(--sh-2); color: inherit; transform: translateY(-1px); }
.icard.must { border-left-color: var(--imp-must); }
.icard.key { border-left-color: var(--imp-key); }
.icard.aware { border-left-color: var(--imp-aware); }
.icard.normal { border-left-color: var(--muted); }
.icard.must:hover { border-color: var(--imp-must-line); border-left-color: var(--imp-must); }
.icard.key:hover { border-color: var(--imp-key-line); border-left-color: var(--imp-key); }
.icard.aware:hover { border-color: var(--imp-aware-line); border-left-color: var(--imp-aware); }

.icard-top { display: flex; align-items: center; gap: 7px; margin-bottom: 6px; }
.icard-name { font-size: 13px; font-weight: 700; color: var(--text); }
.icard.must .icard-name { color: var(--imp-must); }
.icard.key .icard-name { color: var(--imp-key); }
.icard.aware .icard-name { color: var(--imp-aware); }
.icard-num {
  font-size: 25px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.icard-num small { font-size: 12px; font-weight: 500; color: var(--muted); margin-left: 3px; }
.icard-sub { font-size: 12px; color: var(--muted); margin-top: 3px; }
.icard-bar {
  height: 4px;
  border-radius: 99px;
  background: var(--surface-3);
  overflow: hidden;
  margin-top: 10px;
}
.icard-bar i { display: block; height: 100%; width: 0; border-radius: inherit; background: var(--muted); transition: width .9s cubic-bezier(.2, .8, .2, 1); }
.icard.must .icard-bar i { background: var(--imp-must); }
.icard.key .icard-bar i { background: var(--imp-key); }
.icard.aware .icard-bar i { background: var(--imp-aware); }
.bcard-foot .dots i.e { background: var(--easy); }
.bcard-foot .dots i.m { background: var(--medium); }
.bcard-foot .dots i.h { background: var(--hard); }

.bcard-bar {
  margin-top: 11px;
  height: 3px;
  border-radius: 99px;
  background: #eceff4;
  overflow: hidden;
}
.bcard-bar i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--primary);
  transition: width .8s cubic-bezier(.2, .8, .2, 1);
}

/* ---------- 快捷入口（小方块） ---------- */
.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}
.quick {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--text-2);
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
  transition: border-color .14s, background .14s, color .14s;
}
.quick:hover {
  border-color: var(--primary-line);
  background: var(--primary-soft);
  color: var(--primary);
}
.quick .ico {
  width: 24px; height: 24px;
  flex: none;
  border-radius: var(--r-xs);
  display: grid; place-items: center;
  background: var(--surface-3);
  font-size: 13px;
}
.quick:hover .ico { background: #fff; }

/* ==========================================================
   明细表（仪表盘里的紧凑表格）
   ========================================================== */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th {
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  padding: 9px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.tbl td {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.tbl tr:last-child td { border-bottom: 0; }
.tbl tbody tr:hover td { background: var(--surface-2); }
.tbl td b { color: var(--text); font-weight: 600; }
.tbl .num { font-variant-numeric: tabular-nums; text-align: right; }
.tbl .mini-bar {
  width: 74px;
  height: 5px;
  border-radius: 99px;
  background: #eceff4;
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
}
.tbl .mini-bar i {
  display: block;
  height: 100%;
  border-radius: 99px;
  background: var(--primary);
}

/* ==========================================================
   刷题页：筛选列 + 题目列
   ========================================================== */
.practice-layout {
  display: grid;
  grid-template-columns: 244px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.practice-layout > .side {
  min-width: 0;
}

/* 收起筛选 */
body.filter-hidden .practice-layout { grid-template-columns: minmax(0, 1fr); }
body.filter-hidden .practice-layout > .side { display: none; }

@media (max-width: 900px) {
  .practice-layout { grid-template-columns: minmax(0, 1fr); }
}

/* 题目列的顶部条 */
.q-col > .bar {
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 10px 14px;
  margin-bottom: 12px;
}

/* ==========================================================
   共享组件的后台化覆盖（必须放在 style.css 之后）
   ========================================================== */

/* 按钮：去掉胶囊和大投影，改成 6px 方角 */
.btn {
  border-radius: var(--r-sm);
  padding: 9px 17px;
  font-size: 13.5px;
  font-weight: 500;
  gap: 7px;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--primary);
  box-shadow: none;
}
.btn-primary:hover {
  background: var(--primary-600);
  box-shadow: none;
  transform: none;
}

.btn-line {
  box-shadow: none;
}
.btn-line:hover { background: var(--primary-soft); }

.btn-danger {
  background: var(--bad);
  box-shadow: none;
}
.btn-danger:hover { background: #bd2f3c; box-shadow: none; transform: none; }

.btn-ink { background: var(--text); }
.btn-ink:hover { background: #2f3542; }

.btn-ghost-danger:hover { background: var(--hard-soft); }

.btn-sm { padding: 7px 13px; font-size: 13px; }
.btn-xs { padding: 5px 10px; font-size: 12px; border-radius: var(--r-xs); }

/* 输入控件：方角 + 聚焦描边 */
.input, .input-area, .sel, .textarea, .search-box {
  border-radius: var(--r-sm);
}
.input:focus, .input-area:focus, .sel:focus, .textarea:focus, .search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(22, 104, 220, .10);
}

/* 面板：更像截图里的小卡片 */
.panel {
  border-radius: var(--r);
  box-shadow: none;
}
.panel-head {
  font-size: 13px;
  font-weight: 600;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
}
.panel-body { padding: 12px 13px; }

/* 标签页：下划线式，更像后台 */
.nav-tabs {
  display: flex;
  gap: 4px;
}
.nav-tab {
  border-radius: var(--r-sm) var(--r-sm) 0 0;
  padding: 8px 14px;
  font-size: 13.5px;
  border: 1px solid transparent;
  border-bottom: 2px solid transparent;
  background: transparent;
}
.nav-tab:hover { background: var(--surface-3); color: var(--text); }
.nav-tab.active {
  background: transparent;
  border-color: transparent;
  border-bottom-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

/* chip：方角小标签 */
.chip {
  border-radius: var(--r-sm);
  padding: 6px 11px;
  font-size: 13px;
}

/* 顶栏（内页原有）也统一高度与描边 */
.topbar {
  height: var(--top-h);
  padding: 0 18px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

/* 题卡与详情卡：方角 */
.q-card, .explain-block, .q-row, .modal {
  border-radius: var(--r);
}
.modal { box-shadow: var(--sh-3); }

/* 空状态 */
.empty { padding: 44px 20px; }

/* 首页底部的快捷键提示（浅色版） */
.cover-foot {
  position: static;
  padding: 16px 20px 30px;
  justify-content: flex-start;
  gap: 18px;
  color: var(--muted);
}
.cover-foot kbd {
  background: var(--surface-3);
  border-color: var(--border);
  color: var(--text-2);
}

/* 后台风格下内页不铺整页背景图 —— 图片只在首页横幅里出现，画面才干净 */
.app-page.has-bg::before { display: none !important; }
body.has-bg { background: var(--bg); }

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width: 1180px) {
  .stat-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dash-cols, .dash-cols-2 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 1024px) {
  .dash-hero { min-height: 156px; padding: 20px 22px; }
  .dash-hero h1 { font-size: 23px; }
  .dash-hero-kpi { width: 100%; }
  .hero-kpi { flex: 1; min-width: 76px; }
}

@media (max-width: 900px) {
  /* 侧栏改成抽屉 */
  .admin-side {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: transform .24s cubic-bezier(.2, .8, .2, 1);
    box-shadow: var(--sh-3);
  }
  body.nav-open .admin-side { transform: none; }
  body.nav-open .admin-scrim { display: block; }

  .admin-burger { display: inline-flex; align-items: center; justify-content: center; }
  .admin-body { padding: 12px 12px 26px; }
  .admin-top { padding: 0 12px; }
  .admin-top-stat { display: none; }
}

@media (max-width: 720px) {
  .stat-cards { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .dash-hero { min-height: auto; padding: 18px; }
  .dash-hero h1 { font-size: 21px; }
  .dash-hero p { font-size: 13px; }
  .board-cards { grid-template-columns: minmax(0, 1fr); }
  .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .crumb .keep-sm { display: none; }
}


/* ==========================================================
   知识讲堂
   ========================================================== */
.study-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}
.study-toc {
  position: sticky;
  top: calc(var(--top-h) + 12px);
  max-height: calc(100vh - var(--top-h) - 26px);
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--surface);
  padding: 8px;
}
.toc-chapter { margin-bottom: 6px; }
.toc-chapter-title {
  font-size: 12.5px; font-weight: 700; color: var(--text-2);
  padding: 8px 10px 4px;
  display: flex; align-items: center; justify-content: space-between;
}
.toc-chapter-title span { font-weight: 500; color: var(--faint); font-size: 11px; }
.toc-note {
  list-style: none;
  font-size: 13px; color: var(--text-2);
  padding: 7px 10px; border-radius: var(--r-xs);
  cursor: pointer;
  transition: background .14s, color .14s;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.toc-note:hover { background: var(--surface-3); color: var(--text); }
.toc-note.on { background: var(--primary-soft); color: var(--primary); font-weight: 600; }

.study-article { min-height: 400px; }
.study-empty { color: var(--muted); font-size: 14px; line-height: 1.9; }
.study-doc { font-size: 14.5px; line-height: 1.95; color: var(--text-2); word-break: break-word; }
.study-doc h1, .study-doc h2, .study-doc h3 {
  color: var(--text); font-weight: 700; line-height: 1.5;
  margin: 26px 0 12px; padding-left: 10px; border-left: 3px solid var(--primary);
}
.study-doc h1 { font-size: 19px; }
.study-doc h2 { font-size: 17px; }
.study-doc h3 { font-size: 15.5px; }
.study-doc p { margin: 0 0 14px; }
.study-doc ul, .study-doc ol { margin: 0 0 14px; padding-left: 26px; }
.study-doc li { margin-bottom: 6px; }
.study-doc pre {
  background: #ffffff; color: #111111;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  padding: 14px 16px; margin: 0 0 16px;
  overflow-x: auto;
  font-size: 13px; line-height: 1.75;
  font-family: var(--mono);
}
.study-doc code {
  font-family: var(--mono); font-size: 13px;
  background: var(--surface-3); color: var(--text);
  padding: 1.5px 6px; border-radius: 5px;
}
.study-doc pre code { background: transparent; color: inherit; padding: 0; }
.study-doc img { max-width: 100%; height: auto; border-radius: var(--r-sm); border: 1px solid var(--border); margin: 6px 0; }
.study-doc table { border-collapse: collapse; margin: 0 0 16px; width: 100%; font-size: 13.5px; }
.study-doc th, .study-doc td { border: 1px solid var(--border-strong); padding: 8px 12px; text-align: left; }
.study-doc th { background: var(--surface-3); color: var(--text); font-weight: 700; }
.study-doc blockquote {
  margin: 0 0 14px; padding: 10px 14px;
  border-left: 3px solid var(--medium-line);
  background: var(--medium-soft);
  border-radius: 0 var(--r-xs) var(--r-xs) 0;
  color: var(--text-2);
}
.study-doc hr { border: none; border-top: 1px solid var(--border); margin: 22px 0; }

@media (max-width: 900px) {
  .study-layout { grid-template-columns: minmax(0, 1fr); }
  .study-toc { position: static; max-height: 320px; }
}