/* ===== 更新动态页 /trends/ ===== */

.page-news {
  --news-rail-w: 232px;
  --news-gap: 32px;
}

/* ---------- 页头 ---------- */
.page-news .news-head {
  padding: 36px 0 30px;
}

.page-news .news-head .page-title {
  margin: 12px 0 14px;
  font-size: clamp(27px, 5vw, 44px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-news .news-head .page-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 两栏骨架 ---------- */
.page-news .news-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--news-gap);
  padding-bottom: 64px;
}

/* ---------- 期号索引 ---------- */
.page-news .issue-rail {
  border-top: 2px solid var(--red);
  padding-top: 14px;
  min-width: 0;
}

.page-news .issue-rail__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-news .issue-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-news .issue-rail__item {
  margin: 0;
}

.page-news .issue-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.2;
  transition: border-color 0.18s ease-out, background 0.18s ease-out, color 0.18s ease-out;
}

.page-news .issue-rail__link:hover,
.page-news .issue-rail__link.is-active {
  border-color: var(--red);
  background: rgba(215, 38, 61, 0.07);
  color: var(--red);
}

.page-news .issue-rail__num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--red);
}

.page-news .issue-rail__label {
  white-space: nowrap;
}

.page-news .issue-rail__art {
  display: none;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

/* ---------- 条目流 ---------- */
.page-news .issue-stream {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 52px;
}

.page-news .chapter {
  scroll-margin-top: calc(var(--bar-h, 64px) + 24px);
}

.page-news .chapter__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

.page-news .chapter__title {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-news .chapter__meta {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 01 更新节奏 ---------- */
.page-news .pace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-news .pace-copy p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.page-news .pace-copy p:last-child {
  margin-bottom: 0;
}

/* ---------- 02 本期头条 ---------- */
.page-news .lead-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--red);
  border-radius: 2px;
}

.page-news .lead-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.page-news .lead-item__title {
  margin: 0 0 12px;
  font-size: 21px;
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-news .lead-item__body > p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-news .lead-item__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-news .lead-item__list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-news .lead-item__list li:last-child {
  margin-bottom: 0;
}

.page-news .lead-item__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--red);
}

.page-news .lead-item__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

/* ---------- 03 版本迭代记录 ---------- */
.page-news .issue-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .issue-item {
  position: relative;
  margin-bottom: 14px;
  padding: 16px 18px 16px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--mist);
  border-radius: 2px;
  transition: transform 0.18s ease-out, border-left-color 0.18s ease-out, box-shadow 0.18s ease-out;
  scroll-margin-top: calc(var(--bar-h, 64px) + 24px);
}

.page-news .issue-item:last-child {
  margin-bottom: 0;
}

.page-news .issue-item:hover {
  transform: translateX(4px);
  border-left-color: var(--red);
  box-shadow: 0 10px 22px -18px rgba(26, 26, 46, 0.6);
}

.page-news .issue-item__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.page-news .issue-item__title {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
}

.page-news .issue-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 期号与栏目标签 ---------- */
.page-news .issue-badge {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 9px;
  border-radius: 2px;
  background: var(--red);
  color: #ffffff;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1;
  white-space: nowrap;
}

.page-news .issue-tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 9px;
  border-radius: 2px;
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.page-news .issue-tag--red {
  background: #F6D6DA;
  color: #9C1A2C;
}

.page-news .issue-tag--gold {
  background: #FBE3C8;
  color: #8A5210;
}

.page-news .issue-tag--mint {
  background: #C8EFEB;
  color: #10615B;
}

/* ---------- 04 分类调整记录 ---------- */
.page-news .tax-feature {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 4px solid var(--mint);
  border-radius: 2px;
  margin-bottom: 8px;
}

.page-news .tax-feature__body h3 {
  margin: 12px 0 10px;
  font-size: 20px;
  line-height: 1.45;
  font-weight: 800;
}

.page-news .tax-feature__body > p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-news .tax-feature__list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.7;
}

.page-news .tax-feature__list li:last-child {
  margin-bottom: 0;
}

.page-news .tax-feature__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--mint);
}

.page-news .tax-feature__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

.page-news .tax-rows {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-bottom: 1px solid var(--line);
}

.page-news .tax-row {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-news .tax-row__k {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--red);
}

.page-news .tax-row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 05 专题系列 ---------- */
.page-news .section-intro {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-news .topic-cover {
  margin-bottom: 18px;
}

.page-news .topic-cover img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

.page-news .topic-list {
  display: grid;
  gap: 12px;
}

.page-news .topic-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--gold);
  border-radius: 2px;
  transition: border-left-color 0.18s ease-out;
}

.page-news .topic-card[open] {
  border-left-color: var(--red);
}

.page-news .topic-card__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

.page-news .topic-card__summary::-webkit-details-marker {
  display: none;
}

.page-news .topic-card__index {
  padding: 3px 8px;
  border-radius: 2px;
  background: var(--gold-soft);
  color: var(--gold-text);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1.4;
  white-space: nowrap;
}

.page-news .topic-card__title {
  flex: 1 1 220px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
}

.page-news .topic-card__arrow {
  margin-left: auto;
  font-size: 18px;
  line-height: 1;
  color: var(--red);
  transition: transform 0.18s ease-out;
}

.page-news .topic-card[open] .topic-card__arrow {
  transform: rotate(45deg);
}

.page-news .topic-card__body {
  padding: 0 16px 16px;
}

.page-news .topic-card__body p {
  margin: 0 0 12px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-news .topic-card__body ul {
  margin: 0;
  padding-left: 18px;
}

.page-news .topic-card__body li {
  margin-bottom: 6px;
  font-size: 15px;
  line-height: 1.7;
}

.page-news .topic-card__body li:last-child {
  margin-bottom: 0;
}

/* ---------- 06 回看与建议 ---------- */
.page-news .review-box {
  display: grid;
  border-top: 1px solid var(--line);
}

.page-news .review-box__row {
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-news .review-box__k {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--red);
}

.page-news .review-box__row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-news .review-box__row a {
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-news .review-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-top: 20px;
  padding: 13px 15px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--mint);
  border-radius: 2px;
}

.page-news .review-copy__label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-news .review-copy__value {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 14px;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.page-news .review-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-news .pace-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-news .tax-rows {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-news .tax-row {
    padding: 18px 20px 18px 0;
    border-top: 1px solid var(--line);
  }

  .page-news .tax-row + .tax-row {
    padding-left: 20px;
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 860px) {
  .page-news .lead-item {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 34px;
    padding: 30px;
  }

  .page-news .lead-item__title {
    font-size: 28px;
  }

  .page-news .tax-feature {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    align-items: center;
    gap: 32px;
    padding: 26px;
  }
}

/* ---------- 桌面：左侧期号索引常驻 ---------- */
@media (min-width: 1000px) {
  .page-news .news-layout {
    grid-template-columns: var(--news-rail-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-news .issue-rail {
    position: sticky;
    top: calc(var(--bar-h, 64px) + 26px);
    max-height: calc(100vh - var(--bar-h, 64px) - 52px);
    overflow-y: auto;
    padding-right: 4px;
  }

  .page-news .issue-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-news .issue-rail__item {
    width: 100%;
  }

  .page-news .issue-rail__link {
    display: flex;
    width: 100%;
    padding: 8px 10px 8px 12px;
    border: 0;
    border-left: 3px solid var(--mist);
    border-radius: 0;
    background: transparent;
    font-size: 13.5px;
  }

  .page-news .issue-rail__link:hover,
  .page-news .issue-rail__link.is-active {
    border-left-color: var(--red);
    background: rgba(215, 38, 61, 0.07);
    color: var(--red);
  }

  .page-news .issue-rail__label {
    white-space: normal;
    line-height: 1.35;
  }

  .page-news .issue-rail__art {
    display: block;
    margin-top: 20px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-news .issue-rail__link,
  .page-news .issue-item,
  .page-news .topic-card,
  .page-news .topic-card__arrow {
    transition: none;
  }

  .page-news .issue-item:hover {
    transform: none;
  }
}