/* ==========================================================================
   每日一本书
   ========================================================================== */

:root {
  --paper: #FBFAF6;
  --card: #FFFFFF;
  --ink: #1F1C18;
  --ink-2: #4A453D;
  --ink-3: #837B70;
  --ink-4: #A79E92;
  --line: #E9E4D9;
  --gold: #A8792F;
  --gold-d: #8A611F;
  --gold-l: #F6EEDC;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(1100px 420px at 50% -140px, #FFFDF6 0%, rgba(255,253,246,0) 70%);
}

a { color: inherit; text-decoration: none; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶栏 ---------- */

.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 14px;
  height: 58px; padding: 0 22px;
  background: rgba(251, 250, 246, .88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.topbar .back { font-size: 13px; color: var(--ink-2); padding: 6px 10px; border-radius: 8px; }
.topbar .back:hover { background: #F2EEE4; }
.topbar .tb-title { font-size: 13.5px; color: var(--ink-3); }
.topbar .tb-title b { color: var(--ink); font-weight: 600; }
.topbar .tb-right { margin-left: auto; font-size: 12.5px; color: var(--ink-3); display: flex; align-items: center; gap: 12px; }

.tb-progress { width: 110px; height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; }
.tb-progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--gold), #C79A4E); transition: width .35s; }

.readbar { position: fixed; top: 0; left: 0; height: 2px; width: 0; background: linear-gradient(90deg, var(--gold), #D8AE63); z-index: 40; }

/* ---------- 首页 ---------- */

.hero { padding: 60px 0 40px; }
.eyebrow { font-size: 12px; letter-spacing: .22em; color: var(--gold-d); text-transform: uppercase; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.eyebrow::before { content: ""; width: 24px; height: 1px; background: var(--gold); }
.hero h1 { margin: 0 0 14px; font-family: var(--serif); font-size: 40px; line-height: 1.3; font-weight: 700; }
.hero p { margin: 0; font-size: 15.5px; line-height: 1.9; color: var(--ink-2); max-width: 34em; }

.list { padding: 10px 0 80px; display: flex; flex-direction: column; gap: 14px; }

.bcard {
  display: grid;
  grid-template-columns: 92px 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: transform .18s, box-shadow .18s;
}
.bcard:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(31,28,24,.08); }

.bcard h3 { margin: 0 0 6px; font-family: var(--serif); font-size: 19px; font-weight: 700; }
.bcard .sub { margin: 0 0 8px; font-size: 13px; color: var(--ink-3); line-height: 1.7; }
.bcard .meta { display: flex; gap: 14px; font-size: 11.5px; color: var(--ink-4); }
.bcard .go { font-size: 12.5px; color: var(--gold-d); white-space: nowrap; }

/* 封面（纯 CSS 画的书封） */
.cover {
  position: relative;
  width: 92px; height: 130px;
  border-radius: 6px 10px 10px 6px;
  overflow: hidden;
  flex: none;
  box-shadow: 0 8px 20px rgba(31,28,24,.16);
  display: flex; flex-direction: column; justify-content: space-between;
  padding: 12px 10px 12px 14px;
  color: #FBF6EC;
}
.cover::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px;
  background: rgba(0,0,0,.28);
}
.cover .c-t { font-family: var(--serif); font-size: 13px; line-height: 1.35; font-weight: 700; }
.cover .c-t::after {
  content: "";
  display: block;
  width: 16px; height: 1.5px;
  margin-top: 9px;
  background: rgba(233, 160, 60, .85);
}
.cover::after {
  content: "";
  position: absolute; right: 10px; bottom: 12px;
  width: 7px; height: 7px; border-radius: 2px;
  background: rgba(233, 160, 60, .7);
}
.cover .c-a { font-size: 9px; opacity: .8; letter-spacing: .08em; }
.cover.big { width: 148px; height: 208px; padding: 18px 14px 18px 20px; }
.cover.big .c-t { font-size: 19px; }
.cover.big .c-a { font-size: 11px; }

/* ---------- 详情页 ---------- */

.b-hero { padding: 46px 0 36px; display: grid; grid-template-columns: 148px 1fr; gap: 38px; align-items: start; }
.b-hero .h1 { margin: 0 0 10px; font-family: var(--serif); font-size: 34px; line-height: 1.32; font-weight: 700; }
.b-hero .h1-sub { margin: 0 0 18px; font-size: 15px; color: var(--ink-3); font-family: var(--serif); }
.b-hero .lead { margin: 0 0 20px; font-size: 16px; line-height: 1.95; color: var(--ink-2); }
.b-meta { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-size: 11.5px; padding: 4px 10px; border-radius: 20px;
  background: #F3EEE2; color: var(--gold-d);
}
.chip.plain { background: #F1EFE9; color: var(--ink-3); }

.sec { padding: 38px 0; border-top: 1px solid var(--line); }
.sec-hd { display: flex; align-items: baseline; gap: 12px; margin-bottom: 22px; }
.sec-hd h2 { margin: 0; font-family: var(--serif); font-size: 21px; font-weight: 700; }
.sec-hd span { font-size: 12px; color: var(--ink-4); }

/* 章节脉络 */
.outline { display: grid; grid-template-columns: 1fr 1fr; gap: 0 34px; }
.ol-item { display: flex; gap: 12px; padding: 9px 0; border-bottom: 1px dashed var(--line); }
.ol-item .n { font-family: var(--serif); font-size: 12px; color: var(--ink-4); flex: none; width: 20px; padding-top: 2px; }
.ol-item .t { font-size: 13.5px; color: var(--ink); line-height: 1.6; }
.ol-item .h { display: block; font-size: 11.5px; color: var(--ink-4); margin-top: 2px; }

/* 十个观点 */
.ideas { counter-reset: idea; }
.idea {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.idea:first-child { border-top: 0; }
.idea .num {
  font-family: var(--serif);
  font-size: 34px;
  line-height: 1;
  color: #E4D6B8;
  font-weight: 700;
  letter-spacing: -.02em;
}
.idea h3 { margin: 0 0 12px; font-size: 19px; line-height: 1.5; font-weight: 700; }
.idea p { margin: 0 0 12px; font-size: 15.5px; line-height: 1.95; color: var(--ink-2); }
.idea p strong { color: var(--ink); font-weight: 600; }
.idea blockquote {
  margin: 0 0 14px; padding: 14px 18px;
  border-left: 2px solid var(--gold);
  background: #FFFDF7;
  border-radius: 0 8px 8px 0;
  font-size: 14.5px; line-height: 1.9; color: var(--ink-2);
}
.act {
  margin-top: 14px;
  display: flex; gap: 10px;
  padding: 13px 16px;
  background: var(--gold-l);
  border-radius: 10px;
  font-size: 13.5px;
  line-height: 1.8;
  color: #6F4E12;
}
.act b { flex: none; font-weight: 600; color: var(--gold-d); }

/* 带走一句话 */
.take {
  margin: 40px 0 0;
  padding: 34px 32px;
  border-radius: 16px;
  background: linear-gradient(160deg, #232019, #1B1814);
  color: #F6EFE2;
}
.take .k { font-size: 11.5px; letter-spacing: .22em; color: #C9A26A; margin-bottom: 16px; }
.take p {
  margin: 0;
  font-family: var(--serif);
  font-size: 23px;
  line-height: 1.7;
  color: #FBF6EC;
}

/* 上下本 */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 36px 0 80px; }
.pg { padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); transition: border-color .16s; }
.pg:hover { border-color: var(--ink-4); }
.pg span { display: block; font-size: 11.5px; color: var(--ink-4); margin-bottom: 6px; }
.pg b { font-size: 14.5px; font-weight: 500; }
.pg.next { text-align: right; }
.pg.empty { visibility: hidden; }

/* 底部行动 */
.cta {
  margin: 10px 0 90px;
  padding: 30px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--card);
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.cta .t { flex: 1; min-width: 220px; }
.cta .t b { display: block; font-size: 16px; margin-bottom: 8px; font-family: var(--serif); }
.cta .t p { margin: 0; font-size: 13.5px; color: var(--ink-3); line-height: 1.8; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 42px; padding: 0 20px; border-radius: 10px;
  border: 1px solid var(--line); background: #fff;
  font-size: 14px; color: var(--ink); cursor: pointer;
  font-family: inherit;
}
.btn:hover { border-color: var(--ink-4); }
.btn-gold { background: linear-gradient(180deg, #B98A3A, var(--gold-d)); border-color: var(--gold-d); color: #FFF9EC; }

@media (max-width: 760px) {
  /* 顶部工具条：返回、书名、时长三样挤不下，书名省略、时长藏起来 */
  .topbar { gap: 8px; padding: 0 14px; }
  .topbar .back { flex: none; white-space: nowrap; padding: 6px 6px; }
  .topbar .tb-title {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .topbar .tb-right { flex: none; gap: 8px; }
  #tb-min { display: none; }
  .tb-progress { width: 54px; }

  .hero h1 { font-size: 30px; }
  .b-hero { grid-template-columns: 1fr; gap: 22px; }
  .b-hero .h1 { font-size: 26px; }
  .cover.big { width: 116px; height: 164px; }
  .cover.big .c-t { font-size: 16px; }
  .outline { grid-template-columns: 1fr; }
  .idea { grid-template-columns: 44px 1fr; gap: 14px; }
  .idea .num { font-size: 26px; }
  .idea h3 { font-size: 17px; }
  .take p { font-size: 19px; }
  .pager { grid-template-columns: 1fr; }
  .pg.next { text-align: left; }
  .bcard { grid-template-columns: 72px 1fr; gap: 16px; }
  .bcard .go { display: none; }
  .cover { width: 72px; height: 102px; padding: 10px 8px 10px 12px; }
  .cover .c-t { font-size: 11px; }
}