.page-news {
  --news-rail-w: 200px;
  --news-gap: clamp(24px, 4vw, 56px);
}

/* ============ 面包屑 ============ */
.page-news .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-dim);
}
.page-news .breadcrumbs a {
  color: var(--ink-dim);
  text-decoration: none;
  transition: color .2s var(--ease);
}
.page-news .breadcrumbs a:hover,
.page-news .breadcrumbs a:focus-visible {
  color: var(--cyan);
}
.page-news .breadcrumbs [aria-current="page"] {
  color: var(--ink-soft);
}

/* ============ 页首大标题区 ============ */
.page-news .news-masthead {
  padding-top: clamp(26px, 4.5vw, 52px);
}
.page-news .news-masthead__grid {
  display: grid;
  gap: clamp(30px, 4.5vw, 60px);
  align-items: end;
}
.page-news .news-masthead__text .eyebrow {
  display: inline-block;
  margin: 0;
}
.page-news .news-masthead h1 {
  font-family: var(--font-display);
  font-size: var(--display-xl);
  line-height: 1.02;
  letter-spacing: .01em;
  color: var(--ink);
  margin: 14px 0 0;
  max-width: 15ch;
}
.page-news .news-masthead .lede {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}
.page-news .news-masthead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  font-size: 13px;
  color: var(--ink-dim);
}
.page-news .news-masthead__meta li {
  display: flex;
  align-items: baseline;
  gap: 9px;
}
.page-news .news-masthead__meta .mono {
  font-size: 15px;
  color: var(--ink);
  letter-spacing: .02em;
}

.page-news .news-masthead__art {
  margin: 0;
  position: relative;
}
.page-news .news-masthead__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 560;
  object-fit: cover;
  border: 1px solid var(--line);
}
.page-news .news-masthead__art::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--amber), rgba(242,160,61,0) 42%, rgba(53,225,208,0) 58%, var(--cyan));
  pointer-events: none;
}

/* ============ 通用区块标题 ============ */
.page-news .news-section__head {
  max-width: 66ch;
}
.page-news .news-section__head::before {
  content: "";
  display: block;
  width: 42px;
  height: 2px;
  margin-bottom: 16px;
  background: var(--cyan);
}
.page-news .news-section__head--old::before {
  background: var(--amber);
}
.page-news .news-section__head h2 {
  font-family: var(--font-display);
  font-size: var(--display-l);
  line-height: 1.06;
  letter-spacing: .015em;
  color: var(--ink);
  margin: 0;
}
.page-news .news-section__head p {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}
.page-news .news-section__head a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53,225,208,.4);
}
.page-news .news-section__head a:hover {
  border-bottom-color: var(--cyan);
}

/* ============ 本期摘要 ============ */
.page-news .news-brief {
  padding-top: clamp(56px, 8vw, 100px);
}
.page-news .news-brief__grid {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 46px);
  border-top: 1px solid var(--line);
}
.page-news .news-brief__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.page-news .news-brief__no {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--slate);
  padding-top: 4px;
}
.page-news .news-brief__body h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  font-weight: 600;
}
.page-news .news-brief__body p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}
.page-news .news-brief__item:first-child .news-brief__no {
  color: var(--cyan);
}
.page-news .news-brief__item:last-child .news-brief__no {
  color: var(--amber);
}

/* ============ 更新记录 ============ */
.page-news .news-ledger__grid {
  display: grid;
  gap: 28px;
  margin-top: clamp(28px, 4vw, 46px);
}

/* 分类索引轨道 */
.page-news .news-rail {
  margin: 0;
}
.page-news .news-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.page-news .news-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 12px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-news .news-rail__list::-webkit-scrollbar {
  display: none;
}
.page-news .news-rail__list li {
  flex: 0 0 auto;
}
.page-news .news-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}
.page-news .news-rail__list .mono {
  font-size: 11px;
  color: var(--slate);
}
.page-news .news-rail__list a:hover,
.page-news .news-rail__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--ink);
}

/* 时间线配图 */
.page-news .news-log__art {
  margin: 0 0 34px;
}
.page-news .news-log__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 420;
  object-fit: cover;
  border: 1px solid var(--line);
}
.page-news .news-log__caption {
  display: block;
  margin-top: 12px;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* 分组 */
.page-news .news-log__group {
  margin-top: 46px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.page-news .news-log__group:first-of-type {
  margin-top: 0;
}
.page-news .news-log__group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--ink-soft);
}
.page-news .news-log__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.page-news .news-log__dot--new {
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(53,225,208,.14);
}
.page-news .news-log__dot--old {
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(242,160,61,.16);
}

/* 条目 */
.page-news .news-log__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-news .news-log__list > li {
  border-bottom: 1px solid var(--line);
}
.page-news .log-entry {
  position: relative;
}
.page-news .log-entry > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "no    time"
    "title title"
    "tag   tag";
  align-items: center;
  gap: 6px 14px;
  padding: 18px 34px 18px 14px;
  border-left: 2px solid transparent;
  cursor: pointer;
  list-style: none;
  transition: border-color .24s var(--ease), background-color .24s var(--ease);
}
.page-news .log-entry > summary::-webkit-details-marker {
  display: none;
}
.page-news .log-entry > summary::marker {
  content: "";
}
.page-news .log-entry > summary::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 26px;
  width: 7px;
  height: 7px;
  border-right: 1px solid var(--ink-dim);
  border-bottom: 1px solid var(--ink-dim);
  transform: rotate(45deg);
  transition: transform .26s var(--ease), border-color .26s var(--ease);
}
.page-news .log-entry[open] > summary::after {
  transform: rotate(225deg);
  border-color: var(--cyan);
}
.page-news .log-entry > summary:hover,
.page-news .log-entry > summary:focus-visible {
  border-left-color: var(--cyan);
  background-color: rgba(53,225,208,.045);
}
.page-news .log-entry--legacy > summary:hover,
.page-news .log-entry--legacy > summary:focus-visible {
  border-left-color: var(--amber);
  background-color: rgba(242,160,61,.05);
}
.page-news .log-entry[open] > summary {
  border-left-color: var(--cyan);
}
.page-news .log-entry__no {
  grid-area: no;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ink);
}
.page-news .log-entry__time {
  grid-area: time;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-dim);
}
.page-news .log-entry__title {
  grid-area: title;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  padding-top: 2px;
}
.page-news .log-entry .tag {
  grid-area: tag;
  justify-self: start;
}
.page-news .log-entry__body {
  padding: 0 34px 24px 14px;
  max-width: 72ch;
}
.page-news .log-entry__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ink-soft);
}
.page-news .log-entry__fields {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 18px;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px dashed var(--line);
  font-size: 13px;
}
.page-news .log-entry__fields dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--ink-dim);
  white-space: nowrap;
}
.page-news .log-entry__fields dd {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ============ 案例合集 ============ */
.page-news .news-cases {
  padding-top: clamp(56px, 8vw, 100px);
}
.page-news .news-cases__art {
  margin: clamp(26px, 4vw, 44px) 0 0;
}
.page-news .news-cases__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 600;
  object-fit: cover;
  border: 1px solid var(--line);
}
.page-news .news-cases__grid {
  margin-top: clamp(28px, 4vw, 46px);
  column-gap: 24px;
}
.page-news .case-card {
  break-inside: avoid;
  margin: 0 0 24px;
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(30,44,85,.6), rgba(16,26,58,.35));
  transition: transform .3s var(--ease), border-color .3s var(--ease), background-color .3s var(--ease);
}
.page-news .case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(53,225,208,.45);
}
.page-news .case-card__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber);
}
.page-news .case-card__title {
  margin: 12px 0 0;
  font-size: 16.5px;
  line-height: 1.55;
  font-weight: 600;
  color: var(--ink);
}
.page-news .case-card__rows {
  margin: 16px 0 0;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 0;
}
.page-news .case-card__rows dt {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink-dim);
}
.page-news .case-card__rows dd {
  margin: 0;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ink-soft);
}
.page-news .case-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  opacity: .72;
  transition: opacity .3s var(--ease);
}
.page-news .case-card:hover .case-card__tags,
.page-news .case-card:focus-within .case-card__tags {
  opacity: 1;
}

/* ============ 回溯说明 ============ */
.page-news .news-archive__grid {
  display: grid;
  gap: clamp(30px, 4.5vw, 58px);
  align-items: center;
}
.page-news .news-archive__list {
  list-style: none;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
}
.page-news .news-archive__list li {
  display: grid;
  gap: 8px;
  padding: 16px 0 16px 16px;
  border-left: 1px solid var(--line-strong);
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}
.page-news .news-archive__list li + li {
  margin-top: 2px;
}
.page-news .news-archive__key {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}
.page-news .news-archive__text .btn {
  margin-top: clamp(24px, 3.5vw, 34px);
}
.page-news .news-archive__art {
  margin: 0;
}
.page-news .news-archive__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 900 / 520;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* ============ 投稿与反馈 ============ */
.page-news .news-submit {
  padding-top: clamp(52px, 7vw, 88px);
  padding-bottom: clamp(56px, 8vw, 100px);
}
.page-news .news-submit__inner {
  position: relative;
  display: grid;
  gap: 28px;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(118deg, rgba(30,44,85,.72), rgba(10,17,41,.88));
  overflow: hidden;
}
.page-news .news-submit__inner::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--amber), var(--cyan));
}
.page-news .news-submit__text h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--display-m);
  line-height: 1.14;
  letter-spacing: .02em;
  color: var(--ink);
}
.page-news .news-submit__text p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ink-soft);
}
.page-news .news-submit__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-news .news-brief__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-news .news-brief__item {
    border-bottom: 1px solid var(--line);
  }
  .page-news .news-brief__item:nth-child(odd) {
    padding-right: 40px;
    border-right: 1px solid var(--line);
  }
  .page-news .news-brief__item:nth-child(even) {
    padding-left: 40px;
  }
  .page-news .news-brief__item:nth-last-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .page-news .log-entry > summary {
    grid-template-columns: 92px 84px minmax(0, 1fr) auto;
    grid-template-areas: "no time title tag";
    gap: 20px;
    padding: 20px 36px 20px 14px;
  }
  .page-news .log-entry__title {
    padding-top: 0;
  }
  .page-news .log-entry > summary::after {
    top: 50%;
    margin-top: -5px;
  }
  .page-news .log-entry__body {
    padding-left: 126px;
  }

  .page-news .news-cases__grid {
    column-count: 2;
  }
}

@media (min-width: 900px) {
  .page-news .news-masthead__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
  .page-news .news-archive__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
  }
  .page-news .news-submit__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-news .news-ledger__grid {
    grid-template-columns: var(--news-rail-w) minmax(0, 1fr);
    gap: var(--news-gap);
  }
  .page-news .news-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    padding-top: 14px;
    border-top: 1px solid var(--line-strong);
  }
  .page-news .news-rail__list {
    flex-direction: column;
    gap: 0;
    padding: 0;
    overflow: visible;
  }
  .page-news .news-rail__list li {
    flex: 1 1 auto;
  }
  .page-news .news-rail__list a {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    padding: 11px 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    white-space: normal;
  }
  .page-news .news-rail__list a:hover,
  .page-news .news-rail__list a:focus-visible {
    border-bottom-color: var(--cyan);
  }
  .page-news .log-entry__body {
    padding-left: 126px;
  }
}

@media (min-width: 1180px) {
  .page-news .news-cases__grid {
    column-count: 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .case-card,
  .page-news .log-entry > summary,
  .page-news .log-entry > summary::after {
    transition: none;
  }
  .page-news .case-card:hover {
    transform: none;
  }
}