:root {
  --paper: #F7F3EA;
  --paper-2: #FBF8F1;
  --ink: #2C2516;
  --ink-soft: #6B6151;
  --line: #E4DCCB;
  --vermilion: #9E3D2F;
  --gold: #B8893C;
  --shadow: 0 8px 28px rgba(44, 37, 22, 0.08);
  --shadow-hover: 0 14px 40px rgba(44, 37, 22, 0.16);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Songti SC", "STSong", "SimSun", "Noto Serif SC", ui-serif, Georgia, serif;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 6vw;
  background: rgba(247, 243, 234, 0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; }

.seal {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--vermilion);
  color: #fff;
  border-radius: 8px;
  font-size: 22px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(158, 61, 47, 0.3);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 19px; letter-spacing: 1px; }
.brand-text span { font-size: 12px; color: var(--ink-soft); letter-spacing: 2px; }

.search input {
  width: min(360px, 42vw);
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.search input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(184, 137, 60, 0.15);
}

/* ---------- 标题区 ---------- */
.hero {
  padding: 8vh 6vw 4vh;
  text-align: center;
}
.hero h1 {
  font-size: clamp(28px, 4.4vw, 46px);
  letter-spacing: 3px;
  font-weight: 700;
}
.hero p {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: clamp(14px, 1.6vw, 18px);
  letter-spacing: 1px;
}

/* ---------- 分类筛选 ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 0 6vw 3vh;
}
.chip {
  padding: 7px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: all .18s;
}
.chip:hover { border-color: var(--gold); color: var(--ink); }
.chip.active {
  background: var(--ink);
  color: var(--paper-2);
  border-color: var(--ink);
}

/* ---------- 卡片网格 ---------- */
.grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 26px;
  padding: 0 6vw 10vh;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

.card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .22s ease, box-shadow .22s ease;
  display: flex;
  flex-direction: column;
}
.card:hover, .card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  outline: none;
}

.cover {
  position: relative;
  height: 150px;
  background:
    radial-gradient(circle at 80% 20%, rgba(255,255,255,.22), transparent 60%),
    linear-gradient(135deg, var(--cov, #9E3D2F), color-mix(in srgb, var(--cov, #9E3D2F) 70%, #000 30%));
  display: flex;
  align-items: center;
  justify-content: center;
}
.cov-initial {
  font-size: 64px;
  color: rgba(255, 255, 255, 0.92);
  font-weight: 700;
  text-shadow: 0 4px 16px rgba(0,0,0,.25);
}
.cov-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font-size: 12px;
  letter-spacing: 1px;
  border-radius: 999px;
}

.body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.body h3 { font-size: 18px; line-height: 1.45; letter-spacing: .5px; }
.desc { color: var(--ink-soft); font-size: 13.5px; line-height: 1.6; flex: 1; }
.meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}
.meta .date { font-size: 12px; color: var(--ink-soft); letter-spacing: 1px; }
.meta .open { font-size: 13px; color: var(--vermilion); font-weight: 600; }

/* ---------- 空状态 / 页脚 ---------- */
.empty {
  text-align: center;
  color: var(--ink-soft);
  padding: 8vh 6vw 12vh;
  font-size: 16px;
  letter-spacing: 1px;
}
.footer {
  text-align: center;
  padding: 28px 6vw 40px;
  color: var(--ink-soft);
  font-size: 13px;
  letter-spacing: 1px;
  border-top: 1px solid var(--line);
}
.footer .dot { margin: 0 10px; }

@media (max-width: 560px) {
  .topbar { flex-direction: column; align-items: stretch; gap: 12px; }
  .search input { width: 100%; }
}