:root {
  --b:#6ed89a; --b-d:#22b86f; --b-s:#11844c;
  --ink:#1f2937; --ink-s:#4b5563; --ink-m:#9ca3af;
  --line:rgba(110,216,154,0.18);
  --bg:#f6f8f7;
}
body { background:var(--bg); min-height:100vh; }

/* ===== 紧凑标题栏（替代 hero） ===== */
.cat-bar {
  padding: 20px 0 16px;
  border-bottom: 1px solid var(--line);
}
.cat-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.cat-bar__left {
  display: flex;
  align-items: center;
  gap: 14px;
}
.cat-bar__back {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 10px;
  background: #fff; border: 1px solid var(--line);
  color: var(--ink-s); text-decoration: none;
  font-size: 16px; transition: all .2s;
}
.cat-bar__back:hover {
  background: var(--b); color: #fff; border-color: var(--b);
}
.cat-bar__title {
  margin: 0;
  font-size: 22px; font-weight: 800; color: var(--ink);
  display: flex; align-items: center; gap: 10px;
}
.cat-bar__title .emoji { font-size: 26px; }
.cat-bar__stats {
  display: flex; gap: 8px;
}
.cat-bar__stat {
  padding: 5px 14px; border-radius: 999px;
  background: #fff; border: 1px solid var(--line);
  font-size: 13px; color: var(--ink-s);
  font-weight: 500;
}
.cat-bar__stat strong {
  color: var(--b-s); font-weight: 700;
}

/* ===== 主体两栏 ===== */
.cat-main {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 28px;
  padding: 24px 0 60px;
}

/* 左侧导航 - 同 demo1 */
.cat-nav {
  position: sticky; top: 20px; align-self: start;
}
.cat-nav__title {
  font-size: 12px; font-weight: 800; color: var(--ink-m);
  text-transform: uppercase; letter-spacing: .8px;
  margin-bottom: 12px; padding-left: 10px;
}
.cat-nav__list {
  display: flex; flex-direction: column;
}
.cat-nav__list a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 12px;
  text-decoration: none; color: var(--ink-s);
  font-size: 14px; font-weight: 500;
  transition: all .2s ease;
  border-bottom: 1px solid rgba(110,216,154,0.08);
}
.cat-nav__list a:last-child { border-bottom: none; }
.cat-nav__list a:hover {
  background: rgba(110,216,154,.08); color: var(--b-s);
}
.cat-nav__list a.active {
  background: linear-gradient(135deg, #e6f7ef, #f0fdf4);
  color: var(--b-s); font-weight: 700;
  box-shadow: inset 3px 0 0 var(--b);
  border-bottom-color: transparent;
}
.cat-nav__list a .icon { font-size: 18px; width: 24px; text-align: center; }

/* ===== 子分类 - 彩色小卡片 ===== */
.sub-section { margin-bottom: 32px; }
.sub-section__head {
  display: flex; align-items: baseline; gap: 10px;
  margin-bottom: 16px;
}
.sub-section__head h2 {
  margin: 0; font-size: 18px; font-weight: 800; color: var(--ink);
}
.sub-section__head span {
  font-size: 13px; color: var(--ink-m);
}

.sub-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.sub-tile {
  display: flex; flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--line);
  text-decoration: none; color: var(--ink);
  transition: all .25s ease;
  position: relative;
  overflow: hidden;
}
.sub-tile::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--b-d), var(--b));
  opacity: .5; transition: opacity .2s;
}
.sub-tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(110,216,154,.1);
  border-color: rgba(110,216,154,.3);
}
.sub-tile:hover::before { opacity: 1; }
.sub-tile__name {
  font-size: 15px; font-weight: 700;
}
.sub-tile__count {
  font-size: 12px; color: var(--ink-m);
}
.sub-tile__arrow {
  margin-top: 4px;
  font-size: 12px; color: var(--b-d); font-weight: 600;
}

/* ===== 提示词卡片 - demo1 风格 ===== */
.prompt-section__head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 18px;
}
.prompt-section__head h2 {
  margin: 0; font-size: 18px; font-weight: 800; color: var(--ink);
  display: flex; align-items: center; gap: 8px;
}
.prompt-section__head span {
  font-size: 13px; color: var(--ink-m);
}

.card-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
.p-card {
  background: #fff; border-radius: 18px;
  border: 1px solid var(--line);
  padding: 24px 22px 20px 26px;
  text-decoration: none; color: inherit;
  transition: all .35s cubic-bezier(.4,0,.2,1);
  position: relative; overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
.p-card::before {
  content: ""; position: absolute; top: 16px; left: 0; width: 4px;
  height: calc(100% - 32px); border-radius: 0 4px 4px 0;
  background: linear-gradient(180deg, var(--b-d), var(--b));
  opacity: .6; transition: opacity .3s;
}
.p-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(110,216,154,.1), 0 6px 16px rgba(0,0,0,.05);
  border-color: rgba(110,216,154,.28);
}
.p-card:hover::before { opacity: 1; }

.p-card__head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 10px; margin-bottom: 10px;
}
.p-card__title { margin: 0; font-size: 16px; font-weight: 800; color: var(--ink); line-height: 1.35; }
.p-card__desc { margin: 0 0 16px; font-size: 13px; color: var(--ink-s); line-height: 1.7; }
.p-card__foot {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 12px; border-top: 1px solid rgba(110,216,154,.12);
}
.p-card__cat { font-size: 12px; color: var(--ink-m); font-weight: 500; }
.p-card__arrow {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, #e6f7ef, #f0fdf4);
  color: var(--b-s); display: grid; place-items: center;
  font-size: 12px; transition: all .25s ease;
}
.p-card:hover .p-card__arrow {
  background: linear-gradient(135deg, var(--b-d), var(--b)); color: #fff;
  transform: scale(1.1);
}

.acc-tag {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 3px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 800; flex-shrink: 0; letter-spacing: .3px;
}
.acc-free { background: #f0fdf4; color: var(--b-s); }
.acc-login { background: #eff6ff; color: #2563eb; }
.acc-vip { background: linear-gradient(135deg, #fef3c7, #fde68a); color: #92400e; }

/* 响应式 */
@media (max-width: 920px) {
  .cat-main { grid-template-columns: 1fr; }
  .cat-nav { position: static; display: flex; flex-wrap: wrap; gap: 6px; }
  .cat-nav__title { width: 100%; margin-bottom: 6px; }
  .cat-nav__list { flex-direction: row; flex-wrap: wrap; gap: 6px; }
  .cat-nav__list a { width: auto; padding: 7px 14px; font-size: 13px; border-bottom: none; }
  .cat-nav__list a.active { box-shadow: none; background: linear-gradient(135deg, var(--b-d), var(--b)); color: #fff; }
  .sub-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: 1fr; }
}