.page-news {
  --news-notch: 16px;
  --news-spring-bg: #E3F0E9;
  --news-summer-bg: #DDECF2;
  --news-autumn-bg: #F7E8D2;
  --news-winter-bg: #E4E9F3;
}

.page-news .section {
  padding: clamp(46px, 7vw, 92px) 0;
}

.page-news .section--mist {
  background: var(--mist);
}

/* —— 季节色带与章节题头 —— */
.page-news .season-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: 6px;
}

.page-news .season-band span:nth-child(1) { background: var(--spring); }
.page-news .season-band span:nth-child(2) { background: var(--summer); }
.page-news .season-band span:nth-child(3) { background: var(--autumn); }
.page-news .season-band span:nth-child(4) { background: var(--winter-deep); }

.page-news .eyebrow {
  color: var(--season, var(--electric));
}

.page-news .section-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-news .section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 4.2vw, 40px);
  line-height: 1.25;
  margin: 10px 0 12px;
}

.page-news .section-head__note {
  color: var(--ink-soft);
  line-height: 1.85;
  font-size: 15.5px;
  margin: 0;
}

/* —— 首屏 —— */
.page-news .news-hero {
  padding: clamp(30px, 5vw, 62px) 0 0;
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(0, 179, 164, .10), transparent 60%),
    radial-gradient(90% 80% at 4% 2%, rgba(127, 181, 154, .16), transparent 62%),
    var(--paper);
}

.page-news .news-hero__grid {
  display: grid;
  gap: 28px;
  padding-bottom: clamp(32px, 5.5vw, 62px);
}

.page-news .news-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.18;
  letter-spacing: .01em;
  margin: 14px 0 18px;
}

.page-news .news-hero__lede {
  max-width: 60ch;
  color: var(--ink-soft);
  line-height: 1.9;
  font-size: 16px;
  margin: 0 0 18px;
}

.page-news .news-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

.page-news .news-hero__side {
  background: var(--white);
  border: 1px solid var(--rule-soft);
  padding: 22px 22px 18px;
  clip-path: polygon(0 0, calc(100% - var(--news-notch)) 0, 100% var(--news-notch), 100% 100%, 0 100%);
}

.page-news .news-hero__side-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

.page-news .news-facts {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-news .news-facts > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  border-bottom: 1px dashed var(--rule-soft);
  padding-bottom: 10px;
}

.page-news .news-facts > div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-news .news-facts dt {
  font-size: 13.5px;
  color: var(--ink-soft);
}

.page-news .news-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--ink);
  white-space: nowrap;
}

/* —— 反馈时间轴 —— */
.page-news .log-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(18px, 2.6vw, 26px);
}

.page-news .log-timeline::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  opacity: .45;
  background: linear-gradient(180deg, var(--spring), var(--summer) 34%, var(--autumn) 68%, var(--winter-deep));
}

.page-news .log-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.page-news .log-item__rail {
  position: relative;
  display: flex;
  justify-content: center;
  z-index: 1;
}

.page-news .log-item__num {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-news .log-item[data-season="spring"] .log-item__num { background: var(--news-spring-bg); }
.page-news .log-item[data-season="summer"] .log-item__num { background: var(--news-summer-bg); }
.page-news .log-item[data-season="autumn"] .log-item__num { background: var(--news-autumn-bg); }
.page-news .log-item[data-season="winter"] .log-item__num { background: var(--news-winter-bg); }

.page-news .log-item[data-season="spring"] .log-card { --season: var(--spring); }
.page-news .log-item[data-season="summer"] .log-card { --season: var(--summer); }
.page-news .log-item[data-season="autumn"] .log-card { --season: var(--autumn); }
.page-news .log-item[data-season="winter"] .log-card { --season: var(--winter-deep); }

.page-news .log-card {
  background: var(--white);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid var(--season, var(--electric));
  padding: 18px 20px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--news-notch)), calc(100% - var(--news-notch)) 100%, 0 100%);
  transition: box-shadow .22s ease, border-color .22s ease;
}

.page-news .log-card:hover {
  box-shadow: 0 14px 30px -20px rgba(30, 38, 36, .55);
  border-color: var(--rule);
}

.page-news .log-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
}

.page-news .log-card__when {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-soft);
}

.page-news .log-card__title {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  line-height: 1.42;
  margin: 0 0 8px;
}

.page-news .log-card__text {
  color: var(--ink-soft);
  line-height: 1.85;
  font-size: 15px;
  margin: 0 0 12px;
  max-width: 64ch;
}

.page-news .log-card__link {
  display: inline-block;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--rule);
  transition: color .2s ease, border-color .2s ease;
}

.page-news .log-card__link:hover,
.page-news .log-card__link:focus-visible {
  color: var(--season, var(--electric));
  border-color: currentColor;
}

/* —— 内容中心索引 —— */
.page-news .index-grid {
  display: grid;
  gap: clamp(20px, 2.8vw, 28px);
}

.page-news .index-block {
  border-top: 3px solid var(--season, var(--electric));
  padding-top: 16px;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-news .index-block[data-season="spring"] { --season: var(--spring); }
.page-news .index-block[data-season="summer"] { --season: var(--summer); }
.page-news .index-block[data-season="autumn"] { --season: var(--autumn); }
.page-news .index-block[data-season="winter"] { --season: var(--winter-deep); }

.page-news .index-block h3 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--season, var(--ink));
}

.page-news .index-block h3 span {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

.page-news .index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-news .index-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-news .index-list b {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--ink);
  padding-top: 3px;
}

/* —— 版本与帮助文档动态 —— */
.page-news .changelog {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-news .changelog__col {
  background: var(--white);
  border: 1px solid var(--rule-soft);
  padding: 24px 24px 26px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  display: grid;
  gap: 16px;
  align-content: start;
  --season: var(--electric);
}

.page-news .changelog__col[data-season="summer"] { --season: var(--summer); }
.page-news .changelog__col[data-season="autumn"] { --season: var(--autumn); }

.page-news .change-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-news .change-list li {
  padding-left: 14px;
  border-left: 2px solid var(--season, var(--electric));
}

.page-news .change-list__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-soft);
  margin-bottom: 5px;
}

.page-news .change-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-soft);
}

/* —— 季节专题 —— */
.page-news .topic-grid {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-news .topic-card {
  background: var(--white);
  border: 1px solid var(--rule-soft);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: box-shadow .22s ease, border-color .22s ease;
}

.page-news .topic-card[data-season="spring"] { --season: var(--spring); }
.page-news .topic-card[data-season="summer"] { --season: var(--summer); }
.page-news .topic-card[data-season="autumn"] { --season: var(--autumn); }
.page-news .topic-card[data-season="winter"] { --season: var(--winter-deep); }

.page-news .topic-card:hover {
  box-shadow: 0 18px 34px -24px rgba(30, 38, 36, .5);
  border-color: var(--rule);
}

.page-news .news-figure {
  margin: 0;
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, var(--mist), var(--paper));
}

.page-news .news-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-news .topic-card__body {
  padding: 20px 22px 24px;
  display: grid;
  gap: 10px;
  align-content: start;
  flex: 1;
}

.page-news .topic-card__body h3 {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.35;
  margin: 0;
}

.page-news .topic-card__body p:not(.eyebrow) {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.82;
  margin: 0;
}

.page-news .topic-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-news .topic-list li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.62;
  color: var(--ink-soft);
}

.page-news .topic-list li::before {
  content: "—";
  font-family: var(--font-mono);
  color: var(--season, var(--electric));
  flex: none;
}

/* —— 回访提示 —— */
.page-news .revisit {
  background: var(--winter-deep);
  color: var(--winter);
  padding: clamp(28px, 5vw, 54px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
  display: grid;
  gap: 26px;
}

.page-news .revisit .eyebrow {
  color: var(--electric);
}

.page-news .revisit h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.28;
  margin: 10px 0 14px;
  color: var(--winter);
}

.page-news .revisit__body p:not(.eyebrow) {
  margin: 0;
  max-width: 56ch;
  line-height: 1.9;
  font-size: 15.5px;
  color: rgba(244, 248, 248, .82);
}

.page-news .revisit__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.page-news .revisit__links .btn--ghost {
  color: var(--winter);
  border-color: rgba(244, 248, 248, .45);
}

.page-news .revisit__links .btn--ghost:hover,
.page-news .revisit__links .btn--ghost:focus-visible {
  border-color: var(--winter);
}

.page-news .revisit__links .btn--primary {
  background: var(--electric);
  color: #FFFFFF;
  border-color: var(--electric);
}

/* —— 响应式 —— */
@media (min-width: 680px) {
  .page-news .index-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-news .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .topic-card:nth-child(2) {
    margin-top: clamp(18px, 3vw, 40px);
  }

  .page-news .topic-card:nth-child(4) {
    margin-top: clamp(18px, 3vw, 40px);
  }
}

@media (min-width: 820px) {
  .page-news .changelog {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-news .news-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 48px;
    align-items: end;
  }

  .page-news .revisit {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
    gap: 40px;
  }

  .page-news .log-timeline::before {
    left: 27px;
  }

  .page-news .log-item {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 26px;
  }

  .page-news .log-item__num {
    width: 54px;
    height: 54px;
    font-size: 14px;
  }

  .page-news .log-item:nth-child(even) {
    margin-left: clamp(20px, 5vw, 70px);
  }
}

@media (min-width: 1060px) {
  .page-news .index-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .page-news .log-item {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 12px;
  }

  .page-news .log-item__num {
    width: 38px;
    height: 38px;
    font-size: 12px;
  }

  .page-news .log-timeline::before {
    left: 18px;
  }

  .page-news .log-card {
    padding: 16px 16px 18px;
  }

  .page-news .revisit__links .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .log-card,
  .page-news .log-card__link,
  .page-news .log-item__num,
  .page-news .topic-card {
    transition: none;
  }
}