.page-news {
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
}

.page-news .news-topbar {
  padding-top: 1.25rem;
  padding-bottom: 0.75rem;
}

.page-news .news-topbar .breadcrumb a {
  color: var(--mist);
}

.page-news .news-topbar .breadcrumb a:hover,
.page-news .news-topbar .breadcrumb a:focus-visible {
  color: var(--cyan);
}

/* ---------- 首屏 masthead ---------- */
.page-news .news-masthead {
  position: relative;
  background: var(--cream);
  color: var(--cocoa);
  border-top: 4px solid var(--cocoa);
  border-bottom: 6px solid var(--cocoa);
  margin-top: 0.5rem;
}

.page-news .masthead-inner {
  position: relative;
  padding-top: 2rem;
  padding-bottom: 2.25rem;
  padding-right: 0.5rem;
}

.page-news .news-masthead .eyebrow {
  color: var(--cocoa);
  opacity: 0.7;
  font-family: var(--font-data);
  letter-spacing: 0.28em;
  font-size: 0.7rem;
  margin: 0;
}

.page-news .masthead-title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 14vw, 7.5rem);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--cocoa);
}

.page-news .masthead-sub {
  display: block;
  margin-top: 1.15rem;
  font-size: clamp(1rem, 3.4vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: 0;
  font-weight: 700;
  max-width: 22ch;
}

.page-news .masthead-lede {
  margin: 1.25rem 0 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--cocoa);
  opacity: 0.88;
}

.page-news .masthead-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
  margin: 1.75rem 0 0;
  padding: 1rem 0 0;
  border-top: 3px solid var(--cocoa);
}

.page-news .masthead-meta li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-news .meta-value {
  font-family: var(--font-data);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cocoa);
}

.page-news .meta-label {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--cocoa);
  opacity: 0.6;
}

.page-news .masthead-rotate {
  display: none;
}

.page-news .news-figure {
  margin: 0;
  border-top: 6px solid var(--cocoa);
  overflow: hidden;
}

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

.page-news .news-figure--hero img {
  height: clamp(200px, 42vw, 430px);
}

/* ---------- 列表区 ---------- */
.page-news .news-list-section {
  padding: 2.75rem 0 3.5rem;
}

.page-news .list-layout {
  display: grid;
  gap: 2rem;
}

.page-news .index-eyebrow {
  color: var(--cyan);
  font-family: var(--font-data);
  letter-spacing: 0.26em;
  font-size: 0.68rem;
  margin: 0 0 0.75rem;
}

.page-news .index-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  border-top: 3px solid var(--deep);
  border-bottom: 3px solid var(--deep);
  padding: 0.85rem 0;
}

.page-news .index-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.45rem 0.7rem;
  border: 2px solid rgba(201, 213, 228, 0.28);
  color: var(--mist);
  text-decoration: none;
  font-size: 0.88rem;
  transition: border-color 0.16s ease, color 0.16s ease, background 0.16s ease;
}

.page-news .index-link:hover,
.page-news .index-link:focus-visible {
  border-color: var(--orange);
  color: var(--white);
  background: var(--deep);
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}

.page-news .index-num {
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--cyan);
}

.page-news .index-note {
  margin: 1rem 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--steel);
  max-width: 30ch;
}

.page-news .news-h2 {
  margin: 0.4rem 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.7rem, 5.4vw, 2.75rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--cocoa);
}

.page-news .news-h2--light {
  color: var(--white);
}

.page-news .list-lede {
  margin: 0 0 2rem;
  max-width: 52ch;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-news .obs-group + .obs-group {
  margin-top: 2.5rem;
}

.page-news .group-title {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  margin: 0 0 0.25rem;
  padding-bottom: 0.6rem;
  border-bottom: 4px solid var(--deep);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-news .group-num {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--orange);
}

.page-news .obs-row {
  padding: 1.15rem 0.3rem 1.3rem 1rem;
  border-left: 6px solid transparent;
  border-bottom: 1px solid rgba(201, 213, 228, 0.16);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-news .obs-row:hover,
.page-news .obs-row:focus-within {
  border-left-color: var(--orange);
  background: var(--deep);
}

.page-news .obs-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.8rem;
  margin: 0 0 0.55rem;
}

.page-news .obs-num {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--cyan);
}

.page-news .obs-when {
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-news .obs-time {
  font-family: var(--font-data);
  font-size: 0.74rem;
  color: var(--steel);
}

.page-news .obs-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-news .obs-summary {
  margin: 0;
  max-width: 64ch;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 专题系列 ---------- */
.page-news .series-section {
  background: var(--deep);
  border-top: 6px solid var(--cocoa);
  border-bottom: 6px solid var(--cocoa);
  padding: 3rem 0 3.5rem;
}

.page-news .series-head .eyebrow {
  color: var(--cyan);
  font-family: var(--font-data);
  letter-spacing: 0.26em;
  font-size: 0.68rem;
  margin: 0;
}

.page-news .series-lede {
  margin: 0;
  max-width: 54ch;
  font-size: 0.98rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-news .series-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.25rem;
}

.page-news .series-card {
  background: var(--ink);
  border: 3px solid rgba(201, 213, 228, 0.25);
  box-shadow: 8px 8px 0 rgba(55, 240, 211, 0.22);
  padding: 0;
  overflow: hidden;
}

.page-news .series-card:nth-child(2) {
  box-shadow: 8px 8px 0 rgba(255, 106, 43, 0.24);
}

.page-news .series-body {
  padding: 1.4rem 1.2rem 1.5rem;
}

.page-news .series-num {
  display: block;
  font-family: var(--font-data);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--cyan);
  margin-bottom: 0.6rem;
}

.page-news .series-title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  line-height: 1.25;
  color: var(--white);
}

.page-news .series-text {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-news .series-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-news .series-figure {
  border-top: 3px solid rgba(201, 213, 228, 0.25);
}

.page-news .series-figure img {
  height: clamp(160px, 38vw, 240px);
}

/* ---------- 编辑方法 ---------- */
.page-news .method-section {
  padding: 3rem 0 3.5rem;
}

.page-news .method-layout {
  display: grid;
  gap: 2.25rem;
}

.page-news .method-intro .eyebrow {
  color: var(--cyan);
  font-family: var(--font-data);
  letter-spacing: 0.26em;
  font-size: 0.68rem;
  margin: 0;
}

.page-news .method-lede {
  margin: 0 0 1.5rem;
  max-width: 46ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-news .method-details {
  border: 3px solid rgba(201, 213, 228, 0.28);
  background: var(--deep);
}

.page-news .method-details summary {
  list-style: none;
  cursor: pointer;
  padding: 0.9rem 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.94rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

.page-news .method-details summary::after {
  content: "+";
  font-family: var(--font-data);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--orange);
}

.page-news .method-details[open] summary::after {
  content: "–";
}

.page-news .method-details summary:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: -3px;
}

.page-news .method-details-body {
  padding: 0 1rem 1rem;
  border-top: 2px solid rgba(201, 213, 228, 0.2);
}

.page-news .method-details-body p {
  margin: 0.9rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-news .method-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 4px solid var(--deep);
}

.page-news .method-step {
  padding: 1.2rem 0 1.25rem 0.9rem;
  border-bottom: 1px solid rgba(201, 213, 228, 0.16);
  border-left: 6px solid transparent;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-news .method-step:hover {
  border-left-color: var(--cyan);
  background: rgba(15, 36, 64, 0.55);
}

.page-news .step-num {
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--orange);
}

.page-news .step-title {
  margin: 0.3rem 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--white);
}

.page-news .step-text {
  margin: 0;
  max-width: 56ch;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 返回入口 ---------- */
.page-news .next-section {
  background: var(--cream);
  color: var(--cocoa);
  border-top: 6px solid var(--cocoa);
  padding: 2.75rem 0 3.25rem;
}

.page-news .next-head .eyebrow {
  color: var(--cocoa);
  opacity: 0.65;
  font-family: var(--font-data);
  letter-spacing: 0.26em;
  font-size: 0.68rem;
  margin: 0;
}

.page-news .next-lede {
  margin: 0;
  max-width: 52ch;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--cocoa);
  opacity: 0.82;
}

.page-news .next-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-news .next-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.3rem 1.15rem 1.4rem;
  background: var(--white);
  border: 3px solid var(--cocoa);
  box-shadow: 8px 8px 0 var(--cocoa);
  color: var(--cocoa);
  text-decoration: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}

.page-news .next-card:hover,
.page-news .next-card:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--orange);
  box-shadow: 10px 10px 0 var(--orange);
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}

.page-news .next-num {
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--orange);
}

.page-news .next-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

.page-news .next-text {
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--cocoa);
  opacity: 0.82;
}

.page-news .next-go {
  margin-top: 0.35rem;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--cocoa);
  border-bottom: 2px solid var(--cyan);
  align-self: flex-start;
  padding-bottom: 2px;
}

.page-news .next-contact {
  margin: 2rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--cocoa);
  opacity: 0.85;
}

.page-news .next-contact a {
  color: var(--cocoa);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 3px solid var(--orange);
}

.page-news .next-contact a:hover,
.page-news .next-contact a:focus-visible {
  color: var(--orange);
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-news .masthead-inner {
    padding-right: 3.5rem;
  }

  .page-news .obs-row {
    padding-left: 1.35rem;
  }

  .page-news .next-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-news .news-topbar {
    padding-top: 1.5rem;
  }

  .page-news .masthead-inner {
    padding-top: 3rem;
    padding-bottom: 2.75rem;
    padding-right: 5rem;
  }

  .page-news .masthead-rotate {
    display: block;
    position: absolute;
    right: 0.5rem;
    top: 3rem;
    margin: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-data);
    font-size: 0.68rem;
    letter-spacing: 0.34em;
    text-transform: uppercase;
    color: var(--cocoa);
    opacity: 0.55;
  }

  .page-news .news-list-section {
    padding: 3.5rem 0 4.5rem;
  }

  .page-news .list-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-news .index-rail {
    position: sticky;
    top: 6rem;
  }

  .page-news .index-nav {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-news .index-link {
    display: flex;
    width: 100%;
    border: 0;
    border-bottom: 1px solid rgba(201, 213, 228, 0.2);
    padding: 0.6rem 0.4rem;
  }

  .page-news .ob-list,
  .page-news .list-lede {
    max-width: 62ch;
  }

  .page-news .series-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.75rem;
  }

  .page-news .series-card:first-child {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    align-items: stretch;
  }

  .page-news .series-card:first-child .series-figure {
    border-top: 0;
    border-left: 3px solid rgba(201, 213, 228, 0.25);
  }

  .page-news .series-card:first-child .series-figure img,
  .page-news .series-figure img {
    height: 100%;
    min-height: 220px;
  }

  .page-news .series-body {
    padding: 1.75rem 1.6rem 1.8rem;
  }

  .page-news .method-layout {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-news .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

@media (min-width: 1200px) {
  .page-news .masthead-inner {
    padding-top: 3.75rem;
    padding-bottom: 3.25rem;
  }

  .page-news .masthead-sub {
    max-width: 26ch;
  }

  .page-news .list-layout {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 4.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .obs-row,
  .page-news .index-link,
  .page-news .method-step,
  .page-news .next-card {
    transition: none;
  }
}