.page-news {
  --news-rail-w: 288px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(44px, 7vw, 92px);
}

/* ---------- 首屏 ---------- */
.page-news .news-masthead {
  position: relative;
  padding: clamp(18px, 3.5vw, 30px) 0 clamp(30px, 5vw, 54px);
  isolation: isolate;
}
.page-news .news-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(92% 76% at 100% 0%, rgba(127, 169, 164, 0.45), rgba(127, 169, 164, 0) 62%),
    linear-gradient(165deg, var(--paper-deep) 0%, var(--paper) 70%);
  clip-path: polygon(0 0, 100% 0, 100% 74%, 0 100%);
  z-index: -1;
}
.page-news .news-masthead h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 5.6vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--sea);
  margin: 0.32em 0 0.5em;
  max-width: 15ch;
}
.page-news .news-lede {
  max-width: 60ch;
  margin: 0 0 1.3em;
  font-size: clamp(1rem, 1.5vw, 1.08rem);
  line-height: 1.8;
  color: var(--ink);
}
.page-news .news-masthead-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
}
.page-news .news-next {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--tea);
}

/* ---------- 本月补记 ---------- */
.page-news .news-lead-card {
  display: grid;
  gap: clamp(18px, 3vw, 34px);
  padding: clamp(20px, 3.4vw, 38px);
  background: var(--paper-light);
  border: 1px solid var(--shadow);
  border-top: 4px solid var(--copper);
  border-radius: var(--radius-lg);
}
.page-news .news-stamp {
  margin: 0 0 0.6em;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--copper);
}
.page-news .news-lead-copy h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.42rem, 3vw, 2.1rem);
  line-height: 1.35;
  color: var(--sea);
  margin: 0 0 0.7em;
}
.page-news .news-lead-text {
  margin: 0 0 1em;
  max-width: 58ch;
  line-height: 1.8;
}
.page-news .news-lead-points {
  list-style: none;
  margin: 0 0 1.4em;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-news .news-lead-points li {
  position: relative;
  padding-left: 20px;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--tea);
}
.page-news .news-lead-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background: var(--tag);
}
.page-news .news-lead-figure {
  margin: 0;
}
.page-news .figure-frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: var(--radius-md);
}
.page-news .figure figcaption {
  margin-top: 8px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--tea);
}

/* ---------- 主体两栏 ---------- */
.page-news .news-layout {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(30px, 5vw, 56px);
}

/* 侧栏 */
.page-news .news-rail {
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
  align-content: start;
}
.page-news .rail-card,
.page-news .rhythm-card {
  background: var(--paper-light);
  border: 1px solid var(--shadow);
  border-radius: var(--radius-md);
  padding: clamp(16px, 2.4vw, 22px);
}
.page-news .rail-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.08rem;
  color: var(--sea);
  margin: 0 0 0.85em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--shadow);
}
.page-news .news-rail .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-news .news-rail .filter-btn {
  font-family: var(--font-body);
  font-size: 0.86rem;
  line-height: 1.2;
  padding: 8px 14px;
  border-radius: var(--pill);
  border: 1px solid var(--shadow);
  background: var(--paper);
  color: var(--tea);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.page-news .news-rail .filter-btn:hover {
  background: var(--paper-deep);
  transform: translateY(-1px);
}
.page-news .news-rail .filter-btn[aria-pressed="true"] {
  background: var(--tag);
  border-color: var(--tag);
  color: var(--sea-deep);
  font-weight: 600;
}
.page-news .rail-hint {
  margin: 0.9em 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--tea);
}
.page-news .rail-hint .filter-count {
  color: var(--copper);
  font-weight: 600;
  font-size: 0.92rem;
}
.page-news .news-rail-figure {
  margin: 0;
}
.page-news .rhythm-list {
  list-style: none;
  margin: 0 0 clamp(14px, 2vw, 18px);
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-news .rhythm-list li {
  display: grid;
  grid-template-columns: 4.4em minmax(0, 1fr);
  gap: 10px;
  font-size: 0.9rem;
  line-height: 1.65;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--shadow);
}
.page-news .rhythm-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-news .rhythm-key {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--copper);
  padding-top: 0.18em;
}
.page-news .news-rhythm-figure {
  margin: 0;
}

/* 条目流 */
.page-news .news-stream {
  min-width: 0;
}
.page-news .stream-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  padding-bottom: 0.7em;
  border-bottom: 2px solid var(--sea);
}
.page-news .stream-head h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  color: var(--sea);
  margin: 0;
}
.page-news .stream-sub {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--tea);
}
.page-news .log-list {
  display: grid;
}
.page-news .log-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px dashed var(--shadow);
}
.page-news .log-item[hidden],
.page-news .log-item.is-hidden {
  display: none;
}
.page-news .log-rail {
  position: relative;
  display: flex;
  justify-content: center;
}
.page-news .log-num {
  position: relative;
  z-index: 1;
  align-self: start;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--copper);
  background: var(--paper);
  padding: 2px 0 4px;
}
.page-news .log-rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 1.9em;
  bottom: calc(-1 * clamp(18px, 2.6vw, 26px));
  width: 1px;
  background: var(--shadow);
}
.page-news .log-item:last-child .log-rail::before {
  display: none;
}
.page-news .log-body {
  min-width: 0;
}
.page-news .log-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 0.6em;
}
.page-news .tag--tea {
  background: rgba(90, 63, 50, 0.12);
  color: var(--tea);
}
.page-news .tag--sea {
  background: rgba(23, 58, 74, 0.1);
  color: var(--sea);
}
.page-news .log-body h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.08rem, 2.2vw, 1.28rem);
  line-height: 1.45;
  color: var(--sea);
  margin: 0 0 0.45em;
}
.page-news .log-body > p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.76;
  color: var(--ink);
}
.page-news .log-more {
  margin-top: 10px;
}
.page-news .log-more summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--sea);
  list-style: none;
}
.page-news .log-more summary::-webkit-details-marker {
  display: none;
}
.page-news .log-more summary::before {
  content: "+";
  display: inline-grid;
  place-items: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--mist);
  color: var(--paper-light);
  font-size: 0.76rem;
  line-height: 1;
}
.page-news .log-more[open] summary::before {
  content: "−";
}
.page-news .log-more p {
  margin: 8px 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--tea);
  padding-left: 12px;
  border-left: 2px solid var(--mist);
}
.page-news .news-notice {
  margin-top: clamp(20px, 3vw, 28px);
  font-size: 0.9rem;
  line-height: 1.7;
}
.page-news .news-notice a {
  color: var(--copper);
  text-underline-offset: 3px;
}

/* ---------- 往期索引 ---------- */
.page-news .news-archive {
  margin-top: clamp(40px, 6vw, 76px);
  padding-top: clamp(26px, 4vw, 42px);
  border-top: 2px solid var(--sea);
  background: linear-gradient(180deg, rgba(235, 227, 214, 0.5), rgba(244, 239, 230, 0));
}
.page-news .archive-head {
  margin-bottom: clamp(18px, 3vw, 28px);
}
.page-news .archive-head h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  color: var(--sea);
  margin: 0 0 0.4em;
}
.page-news .archive-lede {
  margin: 0;
  max-width: 54ch;
  line-height: 1.75;
  color: var(--tea);
}
.page-news .archive-body {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}
.page-news .archive-list {
  display: grid;
}
.page-news .archive-item {
  padding: 16px 0;
  border-bottom: 1px dashed var(--shadow);
}
.page-news .archive-item:first-child {
  padding-top: 0;
}
.page-news .archive-time {
  margin: 0 0 0.5em;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--copper);
}
.page-news .archive-item h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--sea);
  margin: 0 0 0.35em;
}
.page-news .archive-item p {
  margin: 0 0 0.6em;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--ink);
}
.page-news .archive-link {
  font-size: 0.88rem;
  color: var(--copper);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-news .news-archive-figure {
  margin: 0;
  align-self: start;
}
.page-news .archive-jump {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--tea);
}
.page-news .archive-jump a {
  color: var(--sea);
  text-underline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-news .news-lead-card {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
  .page-news .news-lead-figure {
    margin-top: 6px;
  }
  .page-news .archive-body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
  .page-news .log-item {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 18px;
  }
}

@media (min-width: 980px) {
  .page-news .news-layout {
    grid-template-columns: var(--news-rail-w) minmax(0, 1fr);
    align-items: start;
  }
  .page-news .rail-sticky {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }
  .page-news .news-rail .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .page-news .news-rail .filter-btn {
    text-align: left;
  }
  .page-news .archive-jump {
    text-align: right;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .news-rail .filter-btn,
  .page-news .log-more summary {
    transition: none;
  }
  .page-news .news-rail .filter-btn:hover {
    transform: none;
  }
}
<<<END>>>