/* ============================================================
   HBR 经典文章收藏站 · 深色编辑风格
   强调色取 HBR 经典深红，标题用衬线营造杂志感
   ============================================================ */

:root {
  --bg: #0e1014;
  --bg-elev: #161a21;
  --bg-card: #1a1f29;
  --bg-card-hover: #20262f;
  --border: #2a313c;
  --border-soft: #232a34;
  --text: #e8eaf0;
  --text-dim: #9aa3b2;
  --text-faint: #6b7484;
  --accent: #c8102e;        /* HBR red */
  --accent-soft: #e23b50;
  --accent-bg: rgba(200, 16, 46, 0.12);
  --tag-bg: #232b36;
  --tag-text: #b9c2d0;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ---------- 顶部 ---------- */
.hero {
  position: relative;
  padding: 56px 24px 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-soft);
  background: radial-gradient(
      1200px 400px at 50% -120px,
      rgba(200, 16, 46, 0.18),
      transparent 70%
    ),
    var(--bg);
  overflow: hidden;
}

.hero .kicker {
  display: inline-block;
  letter-spacing: 0.32em;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 18px;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.hero h1 .red {
  color: var(--accent);
}

.hero p.sub {
  margin: 16px auto 0;
  max-width: 640px;
  color: var(--text-dim);
  font-size: 15px;
}

.hero .stats {
  margin-top: 26px;
  display: flex;
  gap: 30px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .stats .stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero .stats .num {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}

.hero .stats .lbl {
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.05em;
}

.auto-update {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--text-dim);
  font-size: 13px;
  border: 1px solid var(--border-soft);
}

.auto-update .live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #2ecc71;
  box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.4);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.4); }
  70% { box-shadow: 0 0 0 8px rgba(46, 204, 113, 0); }
  100% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0); }
}

.auto-update .new {
  margin-left: 2px;
}

/* ---------- 本期专题 ---------- */
.featured-issue {
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border-soft);
  padding: 40px 24px;
}
.featured-inner {
  max-width: 1180px;
  margin: 0 auto;
}
.featured-kicker {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 14px;
}
.featured-issue h2 {
  font-family: var(--serif);
  font-size: clamp(22px, 3.5vw, 34px);
  line-height: 1.25;
  margin-bottom: 10px;
}
#featured-hook {
  color: var(--text-dim);
  max-width: 680px;
  margin-bottom: 28px;
  font-size: 15px;
}
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.featured-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  cursor: pointer;
  transition: transform .15s, background .15s, border-color .15s;
}
.featured-card:hover,
.featured-card:focus {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  outline: none;
}
.featured-card h4 {
  font-size: 17px;
  margin: 10px 0 6px;
  line-height: 1.35;
}
.featured-card p {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.featured-author {
  color: var(--text-faint);
  font-size: 12px;
  margin-bottom: 8px;
}
.featured-all {
  display: inline-block;
  color: var(--accent-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}
.featured-all:hover {
  border-bottom-color: var(--accent-soft);
}

/* ---------- 月度回顾 ---------- */
.monthly-review {
  background: var(--bg);
  border-bottom: 1px solid var(--border-soft);
  padding: 40px 24px;
}
.monthly-inner {
  max-width: 1180px;
  margin: 0 auto;
}
.monthly-kicker {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 14px;
}
.monthly-review h2 {
  font-family: var(--serif);
  font-size: clamp(22px, 3.5vw, 34px);
  line-height: 1.25;
  margin-bottom: 10px;
}
#monthly-hook {
  color: var(--text-dim);
  max-width: 680px;
  margin-bottom: 28px;
  font-size: 15px;
}
.monthly-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.monthly-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  cursor: pointer;
  transition: transform .15s, background .15s, border-color .15s;
}
.monthly-card:hover,
.monthly-card:focus {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  outline: none;
}
.monthly-card h4 {
  font-size: 17px;
  margin: 10px 0 6px;
  line-height: 1.35;
}
.monthly-card p {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.monthly-author {
  color: var(--text-faint);
  font-size: 12px;
  margin-bottom: 8px;
}
.monthly-all {
  display: inline-block;
  color: var(--accent-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}
.monthly-all:hover {
  border-bottom-color: var(--accent-soft);
}

.controls {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(14, 16, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
  padding: 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.search-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  width: 100%;
}

.search-box {
  position: relative;
  flex: 1 1 320px;
}

.search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  stroke: var(--text-faint);
}

.search-box input {
  width: 100%;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 12px 14px 12px 42px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

.sort-select {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
  outline: none;
  cursor: pointer;
}

.sort-select:focus {
  border-color: var(--accent);
}

.chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  max-width: 1180px;
  margin: 0 auto;
  width: 100%;
}

.chip {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.chip:hover {
  border-color: var(--accent);
  color: var(--text);
}

.chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

/* ---------- 网格 ---------- */
.grid {
  max-width: 1180px;
  margin: 28px auto 60px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.15s, border-color 0.15s, background 0.15s;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.15s;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--border);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow);
}

.card:hover::before {
  opacity: 1;
}

.card .meta-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-faint);
}

.card .cat-badge {
  background: var(--accent-bg);
  color: var(--accent-soft);
  border: 1px solid rgba(200, 16, 46, 0.3);
  border-radius: 6px;
  padding: 2px 8px;
  font-weight: 600;
}

.card .year {
  font-family: var(--serif);
  font-size: 13px;
}

.card h3 {
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.3;
  color: var(--text);
}

.card .en-title {
  font-size: 13px;
  color: var(--text-faint);
  font-style: italic;
  margin-top: -6px;
}

.card .author {
  font-size: 13px;
  color: var(--text-dim);
}

.card .author b {
  color: var(--text);
  font-weight: 600;
}

.card .summary {
  font-size: 14px;
  color: var(--text-dim);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card .tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: auto;
}

.card .tag {
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 11px;
  border-radius: 5px;
  padding: 3px 8px;
}

.card .new-badge {
  background: #1f9d55;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 5px;
  padding: 2px 7px;
  letter-spacing: 0.05em;
}

.empty {
  text-align: center;
  color: var(--text-faint);
  padding: 60px 20px;
  grid-column: 1 / -1;
}

/* ---------- 弹窗 ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 16px;
  max-width: 640px;
  width: 100%;
  max-height: 86vh;
  overflow-y: auto;
  padding: 30px;
  position: relative;
  transform: translateY(12px);
  transition: transform 0.18s;
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal .close {
  position: absolute;
  top: 18px;
  right: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 34px;
  height: 34px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  transition: all 0.15s;
}

.modal .close:hover {
  color: var(--text);
  border-color: var(--accent);
}

.modal .cat-badge {
  display: inline-block;
  background: var(--accent-bg);
  color: var(--accent-soft);
  border: 1px solid rgba(200, 16, 46, 0.3);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 14px;
}

.modal h2 {
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.25;
  margin-bottom: 6px;
}

.modal .en-title {
  font-style: italic;
  color: var(--text-faint);
  font-size: 14px;
  margin-bottom: 16px;
}

.modal .byline {
  font-size: 14px;
  color: var(--text-dim);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 18px;
}

.modal .byline b {
  color: var(--text);
}

.modal .section-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 8px;
}

.modal .detail {
  font-size: 15px;
  color: var(--text-dim);
  margin-bottom: 22px;
}

.modal .tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.modal .tag {
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 12px;
  border-radius: 6px;
  padding: 4px 10px;
}

.modal .read-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  padding: 12px 20px;
  border-radius: 10px;
  transition: background 0.15s;
}

.modal .read-link:hover {
  background: var(--accent-soft);
}

.modal .read-link svg {
  width: 16px;
  height: 16px;
  stroke: #fff;
}

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border-soft);
  padding: 28px 24px 40px;
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
  max-width: 760px;
  margin: 0 auto;
}

.footer a {
  color: var(--text-dim);
}

/* ---------- 响应式 ---------- */
@media (max-width: 600px) {
  .hero {
    padding: 40px 18px 30px;
  }
  .grid {
    grid-template-columns: 1fr;
    padding: 0 16px;
  }
  .controls {
    padding: 14px 16px;
  }
}

/* ---------- 主题切换按钮 ---------- */
.theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 60;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--text);
}

/* ---------- 每日一文 ---------- */
.daily-btn {
  margin-top: 22px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 11px 22px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  letter-spacing: 0.02em;
}
.daily-btn:hover {
  background: var(--accent-soft);
}

/* ---------- 卡片：阅读状态与动作 ---------- */
.card .meta-top {
  flex-wrap: wrap;
  gap: 8px;
}
.card .meta-acts {
  margin-left: auto;
  display: flex;
  gap: 6px;
}
.card .act {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.card .act:hover {
  border-color: var(--accent);
  color: var(--text);
}
.card .act.later.on {
  color: #f5b301;
  border-color: #f5b301;
}
.card .act.read.on {
  color: #1f9d55;
  border-color: #1f9d55;
}
.card.read h3 {
  color: var(--text-dim);
}
.card .read-time {
  font-size: 12px;
  color: var(--text-faint);
  margin-top: 4px;
}
.card.read .read-time {
  color: #1f9d55;
}

/* ---------- 弹窗：动作 + 相关 ---------- */
.modal .modal-actions {
  display: flex;
  gap: 10px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.modal .mini-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.modal .mini-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}
.modal .mini-btn.later.on {
  color: #f5b301;
  border-color: #f5b301;
}
.modal .mini-btn.read.on {
  color: #1f9d55;
  border-color: #1f9d55;
}
.modal .related-label {
  margin-top: 2px;
}
.modal .related {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}
.modal .rel-item {
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  transition: all 0.15s;
}
.modal .rel-item:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}
.modal .rel-cat {
  font-size: 11px;
  color: var(--accent-soft);
  background: var(--accent-bg);
  border-radius: 5px;
  padding: 2px 7px;
  white-space: nowrap;
}
.modal .rel-title {
  flex: 1;
  font-size: 14px;
  color: var(--text);
}
.modal .rel-year {
  font-size: 12px;
  color: var(--text-faint);
  font-family: var(--serif);
}

/* ---------- 浅色主题 ---------- */
:root.light {
  --bg: #f6f7f9;
  --bg-elev: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f2f5;
  --border: #e2e6ec;
  --border-soft: #eaeef3;
  --text: #1a1f29;
  --text-dim: #5a6472;
  --text-faint: #97a0ad;
  --accent-bg: rgba(200, 16, 46, 0.08);
  --tag-bg: #eef1f5;
  --tag-text: #5a6472;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}
:root.light .hero {
  background: radial-gradient(
      1200px 400px at 50% -120px,
      rgba(200, 16, 46, 0.1),
      transparent 70%
    ),
    var(--bg);
}
:root.light .controls {
  background: rgba(246, 247, 249, 0.85);
}
:root.light .card.read h3 {
  color: var(--text-faint);
}

/* ---------- 搜索高亮 ---------- */
mark {
  background: rgba(200, 16, 46, 0.25);
  color: #fff;
  padding: 0 2px;
  border-radius: 3px;
}
:root.light mark {
  background: rgba(200, 16, 46, 0.15);
  color: var(--accent);
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 60;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all 0.2s;
  box-shadow: var(--shadow);
}
.back-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-top:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- 弹窗 CTA ---------- */
.cta-box {
  background: var(--accent-bg);
  border: 1px solid rgba(200, 16, 46, 0.25);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 20px;
}
.cta-box .cta-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-soft);
  margin-bottom: 6px;
}
.cta-box p {
  font-size: 13px;
  color: var(--text-dim);
  margin: 0;
  line-height: 1.5;
}
.cta-box strong {
  color: var(--text);
}

/* ---------- 页脚公众号入口 ---------- */
.footer-cta {
  margin-top: 16px;
  padding: 14px 18px;
  background: var(--bg-elev);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  text-align: left;
}
.footer-cta .cta-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-soft);
  margin-bottom: 4px;
}
.footer-cta p {
  color: var(--text-dim);
  margin: 0;
  line-height: 1.5;
}

/* ---------- 检查更新按钮 ---------- */
.update-btn {
  margin-left: 6px;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent-soft);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.update-btn:hover {
  background: var(--accent);
  color: #fff;
}
.update-btn:disabled {
  opacity: 0.6;
  cursor: default;
}
.update-btn.has-update {
  background: var(--accent);
  color: #fff;
  animation: pulse-btn 1.8s infinite;
}
@keyframes pulse-btn {
  0% { box-shadow: 0 0 0 0 rgba(200, 16, 46, 0.5); }
  70% { box-shadow: 0 0 0 7px rgba(200, 16, 46, 0); }
  100% { box-shadow: 0 0 0 0 rgba(200, 16, 46, 0); }
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translate(-50%, 20px);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
  padding: 12px 20px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  z-index: 200;
  transition: opacity 0.2s, transform 0.2s;
  max-width: 86vw;
  text-align: center;
}
.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}