/* ===== 内容故事 · 页面专属样式（作用域：.page-news） ===== */
.page-news {
  --news-line: rgba(143, 163, 184, .24);
  --news-line-soft: rgba(143, 163, 184, .12);
  --news-panel: rgba(20, 42, 69, .72);
  --news-panel-deep: rgba(6, 14, 24, .5);
  --news-ink: #0B1A2E;
  --news-gap: clamp(20px, 3vw, 34px);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-news .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--c-stone);
}

.page-news .crumbs a {
  color: var(--c-lake);
  text-decoration: none;
}

.page-news .crumbs a:hover {
  color: var(--c-volt);
}

.page-news .crumb-sep {
  color: rgba(143, 163, 184, .55);
}

.page-news .crumbs [aria-current="page"] {
  color: var(--c-mist);
}

/* ---------- 首屏：章节预览式刊头 ---------- */
.page-news .stories-head {
  display: grid;
  gap: 30px;
  padding: 24px 0 38px;
  border-bottom: 1px solid var(--news-line);
}

.page-news .stories-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 50px);
  line-height: 1.08;
  letter-spacing: .04em;
  color: var(--c-mist);
}

.page-news .stories-lede {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-news .stories-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-news .chapter-preview {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--news-line);
  border-radius: var(--r);
  background: linear-gradient(180deg, var(--news-panel), rgba(11, 26, 46, .78));
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-news .chapter-preview::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-lake), var(--c-gold));
}

.page-news .chapter-preview-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.page-news .chapter-preview ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .chapter-preview li + li {
  border-top: 1px dashed var(--news-line-soft);
}

.page-news .chapter-preview a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 10px 2px;
  color: var(--c-mist);
  font-size: 14px;
  text-decoration: none;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.page-news .chapter-preview a:hover,
.page-news .chapter-preview a:focus-visible {
  color: var(--c-volt);
  padding-left: 6px;
}

.page-news .chapter-preview a .mono {
  font-size: 12px;
  color: var(--c-lake);
}

/* ---------- 通用章节 ---------- */
.page-news .stories-section {
  padding: clamp(38px, 6vw, 66px) 0;
  border-bottom: 1px solid var(--news-line-soft);
}

.page-news .stories-section--last {
  border-bottom: 0;
  padding-bottom: clamp(46px, 7vw, 80px);
}

.page-news .section-head {
  max-width: 44em;
  margin-bottom: 24px;
}

.page-news .stories-h2 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 3.6vw, 31px);
  line-height: 1.25;
  letter-spacing: .04em;
  color: var(--c-mist);
}

.page-news .stories-p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-stone);
}

.page-news .media-frame img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--r);
}

.page-news .stories-figure {
  margin: 0 0 var(--news-gap);
  border: 1px solid var(--news-line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--news-panel-deep);
}

/* ---------- 01 更新节奏 ---------- */
.page-news .rhythm-grid {
  display: grid;
  gap: 14px;
}

.page-news .rhythm-card {
  position: relative;
  border-left: 3px solid var(--c-slate);
  padding: 20px 20px 18px;
}

.page-news .rhythm-card--lead {
  border-left-color: var(--c-gold);
}

.page-news .rhythm-card:nth-child(3) {
  border-left-color: var(--c-lake);
}

.page-news .rhythm-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-lake);
}

.page-news .rhythm-title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .03em;
  color: var(--c-mist);
}

.page-news .rhythm-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-stone);
}

.page-news .rhythm-foot {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--news-line-soft);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--c-stone);
  opacity: .8;
}

/* ---------- 02 本期专题（反色叠纸） ---------- */
.page-news .feature-paper {
  display: grid;
  gap: 24px;
  padding: clamp(22px, 3.4vw, 34px);
  border-radius: var(--r);
  background: var(--c-paper);
  color: var(--news-ink);
  box-shadow: 10px 10px 0 rgba(6, 14, 24, .55), 0 24px 40px -30px rgba(0, 0, 0, .9);
}

.page-news .feature-eyebrow {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #3E5A6B;
}

.page-news .feature-title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.3;
  letter-spacing: .04em;
  color: var(--news-ink);
}

.page-news .feature-lede {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: #3E5A6B;
}

.page-news .feature-points {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-news .feature-points li {
  position: relative;
  margin: 0;
  padding: 9px 0 9px 22px;
  font-size: 14px;
  line-height: 1.8;
  color: #24384B;
  border-top: 1px solid rgba(62, 90, 107, .22);
}

.page-news .feature-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 18px;
  width: 9px;
  height: 9px;
  background: var(--c-coral);
  transform: skewX(-8deg);
}

.page-news .feature-link {
  margin: 20px 0 0;
}

.page-news .feature-link a {
  display: inline-block;
  padding: 10px 18px;
  background: var(--news-ink);
  color: var(--c-paper);
  font-size: 14px;
  letter-spacing: .02em;
  text-decoration: none;
  border-radius: var(--r);
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-news .feature-link a:hover,
.page-news .feature-link a:focus-visible {
  background: var(--c-gold);
  color: var(--news-ink);
}

.page-news .feature-figure {
  margin: 0;
  border-radius: var(--r);
  overflow: hidden;
  border: 1px solid rgba(11, 26, 46, .35);
}

/* ---------- 03 版本迭代纪事 ---------- */
.page-news .ledger-layout {
  display: grid;
  gap: 0;
}

.page-news .ledger-scale {
  display: none;
}

.page-news .ledger {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .ledger-item {
  padding: 20px 0 22px;
  border-top: 1px solid var(--news-line);
}

.page-news .ledger-item:last-child {
  border-bottom: 1px solid var(--news-line);
}

.page-news .ledger-time {
  margin: 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-gold);
}

.page-news .ledger-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 10px;
}

.page-news .ledger-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--c-mist);
}

.page-news .collapse {
  margin-top: 12px;
  border-top: 1px dashed var(--news-line-soft);
}

.page-news .collapse summary {
  position: relative;
  padding: 10px 0 10px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-lake);
}

.page-news .collapse summary::-webkit-details-marker {
  display: none;
}

.page-news .collapse summary::before {
  content: "+";
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--font-mono);
  color: var(--c-volt);
}

.page-news .collapse[open] summary::before {
  content: "−";
}

.page-news .collapse[open] summary {
  color: var(--c-volt);
  box-shadow: inset 2px 0 0 var(--c-gold);
  padding-left: 22px;
}

.page-news .collapse-body {
  padding: 4px 0 14px 22px;
}

.page-news .collapse-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-stone);
}

/* ---------- 04 案例合集选摘 ---------- */
.page-news .picks {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .pick {
  position: relative;
  padding: 20px 20px 18px;
  border: 1px solid var(--news-line);
  border-radius: var(--r);
  background: linear-gradient(160deg, var(--news-panel), rgba(11, 26, 46, .6));
  transition: border-color .18s var(--ease), transform .2s var(--ease);
}

.page-news .pick:hover {
  border-color: rgba(47, 182, 196, .55);
  transform: translateX(3px);
}

.page-news .pick-head {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.page-news .pick-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: .02em;
  color: var(--c-mist);
}

.page-news .pick-text {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-stone);
}

.page-news .pick-foot {
  margin: 14px 0 0;
  padding-top: 11px;
  border-top: 1px dashed var(--news-line-soft);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--c-lake);
}

/* ---------- 05 术语微课系列 ---------- */
.page-news .course-layout {
  display: grid;
  gap: var(--news-gap);
}

.page-news .course-figure {
  margin: 0;
  border: 1px solid var(--news-line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--news-panel-deep);
}

.page-news .course-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .course-item {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 0;
  border-top: 1px solid var(--news-line-soft);
}

.page-news .course-item:first-child {
  border-top: 1px solid var(--news-line);
}

.page-news .course-no {
  margin: 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-gold);
}

.page-news .course-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--c-mist);
}

.page-news .course-text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-stone);
}

.page-news .course-when {
  grid-column: 2;
  margin: 10px 0 0;
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--c-lake);
}

/* ---------- 06 订阅与回看 ---------- */
.page-news .recall {
  display: grid;
  gap: var(--news-gap);
}

.page-news .recall-steps {
  display: grid;
  gap: 0;
}

.page-news .recall-step {
  position: relative;
  padding: 0 0 22px 26px;
  border-left: 1px solid var(--news-line);
}

.page-news .recall-step:last-child {
  padding-bottom: 0;
}

.page-news .recall-step::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-volt);
  box-shadow: 0 0 0 3px var(--c-night);
}

.page-news .recall-no {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-gold);
}

.page-news .recall-title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--c-mist);
}

.page-news .recall-text {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-stone);
}

.page-news .recall-card {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--news-line);
  border-radius: var(--r);
  background: linear-gradient(180deg, rgba(232, 178, 76, .12), rgba(20, 42, 69, .55));
  overflow: hidden;
}

.page-news .recall-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--c-gold), var(--c-coral));
}

.page-news .recall-card-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.page-news .recall-mail {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.4vw, 19px);
  letter-spacing: .02em;
  color: var(--c-mist);
  word-break: break-all;
}

.page-news .recall-card-note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-stone);
}

.page-news .recall-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-news .recall-back {
  margin: 30px 0 0;
  font-size: 13px;
}

.page-news .recall-back a {
  color: var(--c-lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 182, 196, .4);
  padding-bottom: 2px;
}

.page-news .recall-back a:hover {
  color: var(--c-volt);
  border-bottom-color: var(--c-volt);
}

/* ---------- 断点：平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-news .stories-head {
    padding: 30px 0 46px;
  }

  .page-news .rhythm-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 16px;
  }

  .page-news .rhythm-card--lead {
    grid-row: 1 / span 2;
  }

  .page-news .picks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-news .pick:nth-child(3) {
    margin-top: 18px;
  }

  .page-news .pick:nth-child(5) {
    margin-top: 18px;
  }

  .page-news .course-item {
    grid-template-columns: 74px minmax(0, 1fr) 84px;
    align-items: start;
    gap: 0 18px;
  }

  .page-news .course-when {
    grid-column: 3;
    grid-row: 1;
    margin: 2px 0 0;
    text-align: right;
  }
}

@media (min-width: 960px) {
  .page-news .stories-head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: end;
    padding: 42px 0 56px;
  }

  .page-news .feature-paper {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: clamp(26px, 3.6vw, 44px);
    align-items: center;
  }

  .page-news .ledger-layout {
    grid-template-columns: 98px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-news .ledger-scale {
    display: flex;
    flex-direction: column;
    gap: 26px;
    position: sticky;
    top: 96px;
    padding-left: 14px;
    border-left: 1px solid var(--news-line);
  }

  .page-news .scale-tick {
    position: relative;
    font-size: 12px;
    letter-spacing: .06em;
    color: var(--c-slate);
  }

  .page-news .scale-tick::before {
    content: "";
    position: absolute;
    left: -19px;
    top: 6px;
    width: 10px;
    height: 1px;
    background: var(--c-slate);
  }

  .page-news .scale-tick:first-child {
    color: var(--c-gold);
  }

  .page-news .scale-tick:first-child::before {
    background: var(--c-gold);
    width: 14px;
    left: -23px;
  }

  .page-news .scale-note {
    margin-top: 6px;
    font-size: 10px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: rgba(143, 163, 184, .6);
  }

  .page-news .ledger-item:first-child {
    border-top-color: var(--c-gold);
  }

  .page-news .course-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(30px, 4vw, 52px);
    align-items: start;
  }

  .page-news .course-figure {
    position: sticky;
    top: 96px;
  }

  .page-news .recall {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(30px, 4vw, 56px);
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-news .picks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-news .pick:nth-child(2) {
    margin-top: 22px;
  }

  .page-news .pick:nth-child(3) {
    margin-top: 44px;
  }

  .page-news .pick:nth-child(5) {
    margin-top: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .pick,
  .page-news .chapter-preview a,
  .page-news .feature-link a {
    transition: none;
  }

  .page-news .pick:hover {
    transform: none;
  }
}