/* ==========================================================================
   《保持偏见》THE DEEP BB — v3.0 编辑式视觉系统
   暖白纸面 + 深炭黑版块 + 克制的橙红强调色
   ========================================================================== */

:root {
  --bp-bg: #f6f4ef;
  --bp-paper: #ffffff;
  --bp-ink: #171717;
  --bp-muted: #686868;
  --bp-dark: #131518;
  --bp-accent: #e65c36;
  --bp-accent-ink: #c4451f;
  --bp-line: #dedbd5;
  --bp-line-soft: #ebe8e2;
  --bp-max: 1320px;
  --bp-reading: 740px;
  --bp-gutter: 40px;
  --bp-font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body.bp-body {
  margin: 0;
  background: var(--bp-bg);
  color: var(--bp-ink);
  font-family: var(--bp-font);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
}

::selection {
  background: rgba(230, 92, 54, .18);
}

:focus-visible {
  outline: 2px solid var(--bp-accent);
  outline-offset: 3px;
}

.bp-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--bp-dark);
  color: #fff;
  padding: 10px 16px;
  font-size: 14px;
  text-decoration: none;
}

.bp-skip:focus {
  left: 12px;
  top: 12px;
}

/* ---------- 通用排版元素 ---------- */
.bp-eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--bp-accent-ink);
}

.bp-eyebrow::before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 2px;
  background: var(--bp-accent);
}

.bp-eyebrow--light {
  color: #f0a08a;
}

.bp-sep {
  color: var(--bp-line);
  font-weight: 400;
  padding: 0 2px;
}

.bp-eyebrow--light .bp-sep {
  color: rgba(255, 255, 255, .28);
}

.bp-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--bp-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--bp-ink);
  padding-bottom: 3px;
  transition: color .15s, border-color .15s;
}

.bp-link-arrow::after {
  content: "→";
  font-weight: 400;
  transition: transform .15s;
}

.bp-link-arrow:hover {
  color: var(--bp-accent-ink);
  border-bottom-color: var(--bp-accent);
}

.bp-link-arrow:hover::after {
  transform: translateX(3px);
}

/* ---------- 页眉 ---------- */
.bp-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 244, 239, .94);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--bp-line);
}

.bp-header-inner {
  max-width: var(--bp-max);
  margin: 0 auto;
  padding: 16px var(--bp-gutter);
  display: flex;
  align-items: center;
  gap: 32px;
}

.bp-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  line-height: 1.1;
  flex-shrink: 0;
}

.bp-brand-text {
  display: flex;
  flex-direction: column;
}

.bp-brand-logo {
  display: block;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  object-fit: cover;
}

.bp-brand-name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .08em;
  color: var(--bp-ink);
}

.bp-brand-en {
  margin-top: 5px;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .26em;
  color: var(--bp-muted);
}

.bp-header .blog-header-nav {
  margin-left: auto;
}

.bp-header .nav-list {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.bp-header .nav-list > li > a {
  display: inline-block;
  color: #3d3d3d;
  text-decoration: none;
  font-size: 14.5px;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}

.bp-header .nav-list > li > a:hover,
.bp-header .nav-list > li > a[aria-current="page"] {
  color: var(--bp-ink);
  border-bottom-color: var(--bp-accent);
}

.bp-nav-toggle {
  display: none;
  box-shadow: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  padding: 0;
  background: none;
  border: 1px solid var(--bp-line);
  border-radius: 0;
  cursor: pointer;
}

.bp-nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 4px auto;
  background: var(--bp-ink);
  transition: transform .2s, opacity .2s;
}

.bp-nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.bp-nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.bp-nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* ---------- 主区域 ---------- */
.bp-main {
  max-width: var(--bp-max);
  margin: 0 auto;
  padding: 0 var(--bp-gutter) 96px;
}

/* ---------- 首页：刊头 ---------- */
.bp-masthead {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  gap: 72px;
  align-items: center;
  padding: 80px 0 72px;
}

.bp-masthead-title {
  margin: 0 0 30px;
  font-size: clamp(40px, 4.5vw, 62px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -.02em;
}

.bp-masthead-title span {
  display: block;
}

.bp-masthead-lead {
  max-width: 32em;
  margin: 0 0 36px;
  font-size: 17.5px;
  line-height: 1.9;
  color: var(--bp-muted);
}

.bp-masthead-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 28px;
}

.bp-masthead-note {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

.bp-masthead-visual {
  margin: 0;
}

.bp-masthead-visual img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--bp-line-soft);
}

.bp-masthead-visual figcaption {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  border-top: 2px solid var(--bp-ink);
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.6;
}

.bp-visual-label {
  flex-shrink: 0;
  letter-spacing: .16em;
  color: var(--bp-accent-ink);
  font-weight: 600;
}

.bp-visual-title {
  color: var(--bp-muted);
  text-align: right;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* ---------- 首页：本期重点 ---------- */
.bp-feature {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: 64px;
  align-items: center;
  background: var(--bp-dark);
  color: #fff;
  padding: 56px;
  margin: 0 0 96px;
}

.bp-feature-media {
  display: block;
  text-decoration: none;
}

.bp-feature-media img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.bp-feature-title {
  margin: 0 0 22px;
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -.01em;
}

.bp-feature-title a {
  color: #fff;
  text-decoration: none;
}

.bp-feature-title a:hover {
  color: #f5b39f;
}

.bp-feature-desc {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .68);
}

.bp-feature-meta {
  margin: 0 0 34px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .5);
  font-variant-numeric: tabular-nums;
}

.bp-feature-meta .bp-sep {
  color: rgba(255, 255, 255, .25);
  margin: 0 6px;
}

.bp-play {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
}

.bp-play-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .45);
  color: #fff;
  transition: background .18s, border-color .18s, color .18s;
}

.bp-play:hover .bp-play-dot {
  background: var(--bp-accent);
  border-color: var(--bp-accent);
  color: #fff;
}

.bp-cover-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--bp-dark);
  color: rgba(255, 255, 255, .82);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}

.bp-cover-fallback--sm {
  font-size: 20px;
}

/* ---------- 区块标题 ---------- */
.bp-section {
  margin: 0 0 96px;
}

.bp-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--bp-ink);
  margin-bottom: 36px;
}

.bp-section-head h2 {
  margin: 0;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  letter-spacing: .01em;
}

.bp-section-more {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--bp-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .15s;
}

.bp-section-more::after {
  content: " →";
  transition: transform .15s;
  display: inline-block;
}

.bp-section-more:hover {
  color: var(--bp-accent-ink);
}

.bp-section-more:hover::after {
  transform: translateX(3px);
}

.bp-section-note {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--bp-muted);
}

/* ---------- 精选节目 ---------- */
.bp-picks {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 40px 28px;
}

.bp-pick {
  min-width: 0;
}

.bp-pick--lg {
  grid-column: span 2;
  grid-row: span 2;
}

.bp-pick-cover {
  display: block;
  overflow: hidden;
  background: var(--bp-line-soft);
  text-decoration: none;
}

.bp-pick-cover img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  transition: transform .4s ease, opacity .2s;
}

.bp-pick:hover .bp-pick-cover img {
  transform: scale(1.025);
}

.bp-pick-body {
  padding-top: 14px;
}

.bp-pick-meta {
  display: flex;
  gap: 10px;
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

.bp-pick-meta span + span::before {
  content: "/";
  margin-right: 10px;
  color: var(--bp-line);
}

.bp-pick-title {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.55;
  font-weight: 600;
}

.bp-pick-title a {
  text-decoration: none;
  color: var(--bp-ink);
  transition: color .15s;
}

.bp-pick-title a:hover {
  color: var(--bp-accent-ink);
}

.bp-pick--lg .bp-pick-title {
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.4;
  font-weight: 700;
}

.bp-pick--wide {
  grid-column: span 2;
  display: grid;
  grid-template-columns: minmax(0, 46%) minmax(0, 1fr);
  gap: 0 26px;
  align-items: stretch;
  min-height: 230px;
}

.bp-pick--wide .bp-pick-cover img {
  height: 100%;
  aspect-ratio: auto;
}

.bp-pick--wide .bp-pick-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 0;
}

.bp-pick--wide .bp-pick-title {
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.45;
  font-weight: 700;
}

/* ---------- 剑锋观察 ---------- */
.bp-obs {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
  gap: 56px;
}

.bp-obs-date {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

.bp-obs-title {
  margin: 0 0 20px;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -.01em;
}

.bp-obs-title a {
  text-decoration: none;
  color: var(--bp-ink);
}

.bp-obs-title a:hover {
  color: var(--bp-accent-ink);
}

.bp-obs-desc {
  margin: 0 0 26px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--bp-muted);
  max-width: 34em;
}

.bp-obs-side {
  border-left: 1px solid var(--bp-line);
  padding-left: 40px;
}

.bp-obs-item {
  padding: 20px 0;
  border-top: 1px solid var(--bp-line);
}

.bp-obs-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.bp-obs-item time {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

.bp-obs-item h3 {
  margin: 8px 0 8px;
  font-size: 17px;
  line-height: 1.55;
  font-weight: 600;
}

.bp-obs-item h3 a {
  text-decoration: none;
  color: var(--bp-ink);
}

.bp-obs-item h3 a:hover {
  color: var(--bp-accent-ink);
}

.bp-obs-item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--bp-muted);
}

/* ---------- 专题 ---------- */
.bp-topics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 48px 32px;
}

.bp-topic {
  min-width: 0;
}

.bp-topic-cover {
  display: block;
  margin-bottom: 18px;
  background: var(--bp-line-soft);
  overflow: hidden;
}

.bp-topic-cover img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.bp-topic h3 {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.5;
  font-weight: 700;
}

.bp-topic h3 a {
  text-decoration: none;
  color: var(--bp-ink);
}

.bp-topic h3 a:hover {
  color: var(--bp-accent-ink);
}

.bp-topic p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--bp-muted);
}

.bp-topic time {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

/* ---------- 最新节目索引 ---------- */
.bp-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.bp-index-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--bp-line);
}

.bp-index-item:first-child {
  padding-top: 0;
}

.bp-index-cover {
  display: block;
  width: 84px;
  height: 84px;
  background: var(--bp-line-soft);
  text-decoration: none;
  overflow: hidden;
}

.bp-index-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bp-index-body {
  min-width: 0;
}

.bp-index-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 6px;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

.bp-index-meta .bp-sep {
  color: var(--bp-line);
}

.bp-index-title {
  margin: 0 0 4px;
  font-size: 18px;
  line-height: 1.5;
  font-weight: 650;
}

.bp-index-title a {
  text-decoration: none;
  color: var(--bp-ink);
  transition: color .15s;
}

.bp-index-title a:hover {
  color: var(--bp-accent-ink);
}

.bp-index-desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--bp-muted);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.bp-pagination {
  margin-top: 48px;
}

.bp-pagination ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.bp-pagination a,
.bp-pagination span {
  display: inline-block;
  min-width: 36px;
  padding: 6px 10px;
  text-align: center;
  font-size: 13px;
  color: var(--bp-muted);
  text-decoration: none;
  border: 1px solid var(--bp-line);
  font-variant-numeric: tabular-nums;
}

.bp-pagination a:hover {
  border-color: var(--bp-ink);
  color: var(--bp-ink);
}

.bp-pagination .current,
.bp-pagination span.current {
  background: var(--bp-ink);
  border-color: var(--bp-ink);
  color: #fff;
}

.bp-empty {
  padding: 48px 0;
  color: var(--bp-muted);
  font-size: 15px;
}

/* ---------- 播客详情页 ---------- */
.bp-episode {
  padding-top: 56px;
}

.bp-ep-head {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--bp-line);
}

.bp-ep-cover {
  margin: 0;
  background: var(--bp-line-soft);
  position: sticky;
  top: 96px;
}

.bp-ep-cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.bp-ep-info {
  min-width: 0;
  padding-top: 4px;
}

.bp-ep-title {
  margin: 0 0 20px;
  font-size: clamp(30px, 4.2vw, 56px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -.02em;
}

.bp-ep-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 32px;
  font-size: 13px;
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

.bp-player-card {
  border-top: 2px solid var(--bp-ink);
  padding-top: 22px;
}

.bp-audio {
  display: block;
  width: 100%;
  margin-bottom: 14px;
}

.bp-player-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px 28px;
}

.bp-rates {
  display: flex;
  align-items: center;
  gap: 4px;
}

.bp-rates-label {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--bp-muted);
  margin-right: 6px;
}

.bp-rate {
  border: 1px solid var(--bp-line);
  border-radius: 0;
  box-shadow: none;
  background: transparent;
  color: var(--bp-muted);
  font-size: 12.5px;
  padding: 4px 10px;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
  transition: border-color .15s, color .15s, background .15s;
}

.bp-rate:hover {
  border-color: var(--bp-ink);
  color: var(--bp-ink);
}

.bp-rate.is-active {
  background: var(--bp-ink);
  border-color: var(--bp-ink);
  color: #fff;
}

.bp-ep-body {
  max-width: var(--bp-reading);
  margin-left: 396px;
  padding-top: 48px;
}

/* 本期导读 */
.bp-guide {
  margin: 0 0 56px;
  padding-top: 26px;
  border-top: 2px solid var(--bp-ink);
}

.bp-guide-kicker {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--bp-accent-ink);
}

.bp-guide-lead {
  margin: 0 0 26px;
  font-size: 19px;
  line-height: 1.75;
  font-weight: 500;
  color: var(--bp-ink);
}

.bp-guide-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 36px;
  margin: 0;
}

.bp-guide-facts > div {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 10px;
  padding: 11px 0;
  border-top: 1px solid var(--bp-line-soft);
}

.bp-guide-facts dt {
  margin: 0;
  font-size: 10.5px;
  line-height: 1.9;
  letter-spacing: .12em;
  color: var(--bp-muted);
}

.bp-guide-facts dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--bp-ink);
}

.bp-guide-section {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--bp-line-soft);
}

.bp-guide-section p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--bp-ink);
}

.bp-guide-section p:last-child {
  margin-bottom: 0;
}

.bp-guide-points {
  margin-top: 26px;
}

.bp-guide-points ul {
  margin: 0;
  padding-left: 18px;
}

.bp-guide-points li {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--bp-ink);
}

.bp-guide-points li::marker {
  color: var(--bp-accent);
}

.bp-guide-qa {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--bp-line-soft);
}

.bp-guide-qa summary {
  cursor: pointer;
  list-style: none;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--bp-muted);
}

.bp-guide-qa summary::-webkit-details-marker {
  display: none;
}

.bp-guide-qa summary::before {
  content: "+";
  display: inline-block;
  width: 16px;
  margin-right: 6px;
  color: var(--bp-accent);
  font-weight: 400;
}

.bp-guide-qa[open] summary::before {
  content: "−";
}

.bp-guide-qa ol {
  margin: 14px 0 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--bp-muted);
}

.bp-guide-qa li + li {
  margin-top: 6px;
}

/* 区块小标题 */
.bp-block-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 20px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--bp-ink);
}

.bp-block-title span {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .02em;
  color: var(--bp-muted);
}

.bp-mini-title {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--bp-muted);
}

.bp-timeline,
.bp-mentions,
.bp-sources,
.bp-related,
.bp-transcript {
  margin: 56px 0;
}

.bp-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--bp-line);
}

.bp-timeline-list li {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--bp-line);
  font-size: 15px;
  line-height: 1.75;
}

.bp-ts {
  justify-self: start;
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--bp-accent-ink);
  cursor: pointer;
  font-variant-numeric: tabular-nums;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}

.bp-ts:hover {
  border-bottom-color: var(--bp-accent);
}

.bp-ts--static {
  color: var(--bp-line);
}

.bp-mention-group {
  margin-bottom: 28px;
}

.bp-mention-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
}

.bp-mention-list li {
  color: var(--bp-ink);
}

.bp-mention-list a {
  color: var(--bp-accent-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(196, 69, 31, .3);
}

.bp-sources-body,
.bp-transcript-body {
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--bp-muted);
  overflow-wrap: anywhere;
}

.bp-content,
.bp-ep-body,
.bp-article {
  overflow-wrap: break-word;
}

.bp-transcript summary {
  cursor: pointer;
  list-style: none;
}

.bp-transcript summary::-webkit-details-marker {
  display: none;
}

.bp-transcript[open] summary {
  margin-bottom: 18px;
}

.bp-related-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--bp-line);
}

.bp-related-list li {
  border-bottom: 1px solid var(--bp-line);
}

.bp-related-list a {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 0;
  font-size: 15px;
  text-decoration: none;
  color: var(--bp-ink);
  transition: color .15s;
}

.bp-related-list a::after {
  content: "→";
  color: var(--bp-muted);
  transition: transform .15s;
}

.bp-related-list a:hover {
  color: var(--bp-accent-ink);
}

.bp-related-list a:hover::after {
  transform: translateX(3px);
}

.bp-note {
  margin: 40px 0;
  padding: 14px 0;
  border-top: 1px solid var(--bp-line);
  border-bottom: 1px solid var(--bp-line);
  font-size: 13px;
  color: var(--bp-muted);
}

.bp-cta {
  margin: 48px 0;
}

/* ---------- 文章阅读页 ---------- */
.bp-article {
  max-width: var(--bp-reading);
  margin: 0 auto;
  padding-top: 72px;
}

.bp-article-head {
  margin-bottom: 40px;
}

.bp-article-title {
  margin: 0 0 22px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -.02em;
}

.bp-article-dek {
  margin: 0 0 24px;
  font-size: 19px;
  line-height: 1.8;
  color: var(--bp-muted);
}

.bp-byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--bp-line);
  font-size: 13px;
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

.bp-byline a {
  color: inherit;
}

.bp-edit {
  display: inline-block;
}

.bp-edit a {
  font-size: 12px;
  color: var(--bp-accent-ink);
}

.bp-article-cover {
  margin: 32px 0 0;
  background: var(--bp-line-soft);
}

.bp-article-cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.bp-toc-box {
  margin: 0 0 40px;
  padding: 18px 22px;
  border: 1px solid var(--bp-line);
  background: var(--bp-paper);
}

.bp-toc-box summary {
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--bp-muted);
}

.bp-toc-box summary::-webkit-details-marker {
  display: none;
}

.bp-toc-box summary::before {
  content: "+";
  display: inline-block;
  width: 16px;
  margin-right: 6px;
  color: var(--bp-accent);
  font-weight: 400;
}

.bp-toc-box[open] summary::before {
  content: "−";
}

.bp-toc-box ol {
  margin: 14px 0 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.9;
}

.bp-toc-box a {
  text-decoration: none;
  color: var(--bp-ink);
}

.bp-toc-box a:hover {
  color: var(--bp-accent-ink);
}

.bp-content {
  font-size: 18px;
  line-height: 1.9;
  color: var(--bp-ink);
}

.bp-content > p {
  margin: 0 0 1.4em;
}

.bp-content h2 {
  margin: 2.2em 0 .7em;
  font-size: 26px;
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -.01em;
}

.bp-content h3 {
  margin: 1.9em 0 .6em;
  font-size: 21px;
  line-height: 1.4;
  font-weight: 700;
}

.bp-content img {
  max-width: 100%;
  height: auto;
  margin: 1.5em 0;
}

.bp-content blockquote {
  margin: 2em 0;
  padding: 4px 0 4px 24px;
  border-left: 3px solid var(--bp-accent);
  color: #4a4a4a;
  font-size: 18px;
}

.bp-content a {
  color: var(--bp-accent-ink);
  text-underline-offset: 3px;
}

.bp-content ul,
.bp-content ol {
  margin: 0 0 1.4em;
  padding-left: 1.4em;
}

.bp-content li {
  margin-bottom: .5em;
}

.bp-topic-summary {
  margin: 40px 0;
  padding: 24px 0;
  border-top: 2px solid var(--bp-ink);
  border-bottom: 1px solid var(--bp-line);
  font-size: 17px;
  line-height: 1.9;
}

.bp-topic-block {
  margin: 56px 0;
}

.bp-kt-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--bp-line);
}

.bp-kt-list li {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 24px;
  padding: 13px 0;
  border-bottom: 1px solid var(--bp-line);
  font-size: 14.5px;
  line-height: 1.75;
}

.bp-kt-key {
  color: var(--bp-muted);
  font-variant-numeric: tabular-nums;
}

.bp-neighbor {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin: 56px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--bp-line);
  font-size: 13.5px;
}

.bp-neighbor a {
  text-decoration: none;
  color: var(--bp-muted);
}

.bp-neighbor .neighbor-link {
  padding: 4px 0;
  border: 0;
  border-radius: 0;
  background: none;
}

.bp-neighbor .neighbor-link:hover {
  background: none;
  border-color: transparent;
  color: var(--bp-accent-ink);
}

.bp-neighbor .neighbor-title {
  font-size: 15px;
  color: var(--bp-ink);
}

.bp-neighbor .neighbor-dir {
  font-size: 11.5px;
  letter-spacing: .08em;
}

.bp-tags {
  margin: 28px 0 0;
  font-size: 12px;
  color: var(--bp-muted);
}

.bp-tags a {
  color: var(--bp-muted);
  text-decoration: none;
}

.bp-tags a:hover {
  color: var(--bp-accent-ink);
}

.bp-comments {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 2px solid var(--bp-ink);
}

.bp-comments .form-control,
.bp-comments #comment,
.bp-comments .captcha_input {
  border: 1px solid var(--bp-line);
  border-radius: 0;
  box-shadow: none;
  background: var(--bp-paper);
  padding: 11px 14px;
  font-size: 14.5px;
  font-family: var(--bp-font);
  color: var(--bp-ink);
}

.bp-comments .form-control:focus,
.bp-comments #comment:focus {
  border-color: var(--bp-ink);
  outline: none;
}

.bp-comments .comment-post {
  border-radius: 0;
  background: transparent;
  border: 0;
}

.bp-comments #comment_submit,
.bp-comments input[type="submit"],
.bp-comments button[type="submit"] {
  background: var(--bp-ink);
  border: 0;
  border-radius: 0;
  box-shadow: none;
  color: #fff;
  padding: 11px 26px;
  font-size: 14px;
  cursor: pointer;
}

.bp-comments #comment_submit:hover,
.bp-comments input[type="submit"]:hover,
.bp-comments button[type="submit"]:hover {
  background: var(--bp-accent);
}

.bp-comments .captcha {
  border-radius: 0;
}

/* ---------- 404 ---------- */
.bp-404 {
  max-width: var(--bp-reading);
  margin: 0 auto;
  padding: 120px 24px 140px;
}

.bp-404-code {
  margin: 0;
  font-size: 13px;
  letter-spacing: .3em;
  color: var(--bp-accent-ink);
  font-weight: 600;
}

.bp-404-title {
  margin: 16px 0 16px;
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.02em;
}

.bp-404-desc {
  margin: 0 0 36px;
  max-width: 30em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--bp-muted);
}

.bp-404-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 28px;
}

.bp-404-link {
  font-size: 14px;
  color: var(--bp-muted);
  text-decoration: none;
}

.bp-404-link:hover {
  color: var(--bp-accent-ink);
}

/* ---------- 页脚 ---------- */
.bp-footer {
  background: var(--bp-dark);
  color: rgba(255, 255, 255, .6);
  margin-top: 96px;
}

.bp-footer-inner {
  max-width: var(--bp-max);
  margin: 0 auto;
  padding: 72px var(--bp-gutter) 40px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 32px 48px;
}

.bp-footer-name {
  color: #fff;
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 800;
  letter-spacing: .06em;
  line-height: 1.1;
}

.bp-footer-name::before {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--bp-accent);
  margin-bottom: 20px;
}

.bp-footer-slogan {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .45);
  max-width: 26em;
}

.bp-footer-links {
  display: flex;
  flex-wrap: wrap;
  align-content: start;
  justify-content: flex-end;
  gap: 12px 24px;
}

.bp-footer-links a {
  font-size: 13.5px;
  color: rgba(255, 255, 255, .68);
  text-decoration: none;
}

.bp-footer-links a:hover {
  color: #fff;
}

.bp-footer-meta {
  grid-column: 1 / -1;
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-size: 12px;
  color: rgba(255, 255, 255, .38);
}

.bp-footer-meta a {
  color: rgba(255, 255, 255, .55);
  text-decoration: none;
}

.bp-totop {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 40;
}

.bp-totop button {
  width: 42px;
  height: 42px;
  border-radius: 0;
  box-shadow: none;
  border: 1px solid var(--bp-line);
  background: var(--bp-bg);
  color: var(--bp-ink);
  font-size: 15px;
  cursor: pointer;
  transition: background .15s, color .15s;
}

.bp-totop button:hover {
  background: var(--bp-ink);
  color: #fff;
}

/* ---------- 响应式：平板 ---------- */
@media (max-width: 1080px) {
  :root {
    --bp-gutter: 28px;
  }
  .bp-masthead {
    gap: 40px;
    padding: 64px 0 56px;
  }
  .bp-feature {
    gap: 40px;
    padding: 40px;
    margin-bottom: 72px;
  }
  .bp-picks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .bp-pick--lg {
    grid-column: span 2;
    grid-row: span 1;
  }
  .bp-pick--wide {
    grid-template-columns: minmax(0, 42%) minmax(0, 1fr);
    min-height: 0;
  }
  .bp-obs {
    gap: 36px;
  }
  .bp-obs-side {
    padding-left: 28px;
  }
  .bp-ep-head {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 40px;
  }
  .bp-ep-body {
    margin-left: 300px;
  }
}

/* ---------- 响应式：手机 ---------- */
@media (max-width: 780px) {
  :root {
    --bp-gutter: 20px;
  }
  body.bp-body {
    font-size: 16.5px;
  }
  .bp-header-inner {
    padding: 12px var(--bp-gutter);
    flex-wrap: wrap;
    gap: 0;
  }
  .bp-brand-logo {
    width: 34px;
    height: 34px;
  }
  .bp-brand-name {
    font-size: 17px;
  }
  .bp-brand-en {
    font-size: 8px;
    margin-top: 3px;
  }
  .bp-nav-toggle {
    display: block;
  }
  .bp-header .blog-header-nav {
    flex-basis: 100%;
    display: none;
    margin-left: 0;
  }
  .bp-header .blog-header-nav.is-open {
    display: block;
  }
  .bp-header .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 14px;
    border-top: 1px solid var(--bp-line);
    margin-top: 12px;
  }
  .bp-header .nav-list > li > a {
    display: block;
    padding: 13px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--bp-line-soft);
  }

  .bp-main {
    padding-bottom: 64px;
  }
  .bp-masthead {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 44px 0 40px;
  }
  .bp-masthead-title {
    font-size: clamp(30px, 8.4vw, 40px);
    margin-bottom: 22px;
  }
  .bp-masthead-lead {
    font-size: 16px;
    margin-bottom: 28px;
  }
  .bp-masthead-visual img {
    aspect-ratio: 4 / 3;
  }

  .bp-feature {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 24px;
    margin-bottom: 56px;
  }
  .bp-feature-media img {
    aspect-ratio: 1 / 1;
    max-height: 62vh;
    object-fit: cover;
  }
  .bp-feature-desc {
    font-size: 15px;
  }

  .bp-section {
    margin-bottom: 64px;
  }
  .bp-section-head {
    margin-bottom: 24px;
    padding-bottom: 12px;
  }
  .bp-picks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 16px;
  }
  .bp-pick--lg {
    grid-column: span 2;
  }
  .bp-pick--lg .bp-pick-title {
    font-size: 20px;
  }
  .bp-pick-title {
    font-size: 15px;
  }
  .bp-pick--wide {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 0 16px;
    min-height: 118px;
  }
  .bp-pick--wide .bp-pick-title {
    font-size: 15.5px;
  }
  .bp-pick-meta {
    font-size: 10.5px;
  }

  .bp-obs {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }
  .bp-obs-side {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--bp-line);
  }

  .bp-topics {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .bp-index-item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 16px;
    padding: 16px 0;
  }
  .bp-index-cover {
    width: 64px;
    height: 64px;
  }
  .bp-index-title {
    font-size: 16px;
  }
  .bp-index-desc {
    display: none;
  }

  .bp-episode {
    padding-top: 28px;
  }
  .bp-ep-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-bottom: 36px;
  }
  .bp-ep-cover {
    position: static;
    max-width: 320px;
  }
  .bp-ep-title {
    font-size: clamp(27px, 7.6vw, 36px);
  }
  .bp-ep-meta {
    margin-bottom: 24px;
  }
  .bp-player-actions {
    gap: 14px 20px;
  }
  .bp-ep-body {
    margin-left: 0;
    padding-top: 36px;
  }
  .bp-guide {
    margin-bottom: 40px;
  }
  .bp-guide-lead {
    font-size: 17px;
    line-height: 1.8;
  }
  .bp-guide-facts {
    grid-template-columns: minmax(0, 1fr);
  }
  .bp-guide-facts > div {
    padding: 10px 0;
  }
  .bp-guide-section p {
    font-size: 15.5px;
    line-height: 1.85;
  }
  .bp-guide-points li {
    font-size: 15px;
  }

  .bp-timeline-list li {
    grid-template-columns: 66px minmax(0, 1fr);
    gap: 14px;
    font-size: 14.5px;
  }
  .bp-block-title {
    font-size: 16.5px;
  }

  .bp-article {
    padding-top: 40px;
  }
  .bp-article-dek {
    font-size: 17px;
  }
  .bp-content {
    font-size: 17px;
  }
  .bp-content h2 {
    font-size: 22px;
  }
  .bp-content h3 {
    font-size: 19px;
  }
  .bp-kt-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .bp-footer {
    margin-top: 64px;
  }
  .bp-footer-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 48px var(--bp-gutter) 32px;
  }
  .bp-footer-links {
    justify-content: flex-start;
  }
  .bp-totop {
    right: 16px;
    bottom: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}