.page-news {
  --pn-cut: clamp(140px, 24vw, 300px);
  background: var(--paper);
  color: var(--ink);
}

.page-news [hidden] {
  display: none !important;
}

/* 首屏 */
.page-news__hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.6vw, 52px) 0 clamp(26px, 4.6vw, 54px);
  border-bottom: var(--line);
}

.pn-hero__cut {
  position: absolute;
  top: -12%;
  right: -18%;
  width: min(700px, 96vw);
  height: min(430px, 64vw);
  background: var(--winter);
  opacity: .1;
  clip-path: polygon(16% 0, 100% 0, 100% 74%, 0 100%);
  pointer-events: none;
}

.pn-hero__inner {
  position: relative;
  z-index: 1;
}

.pn-hero__title {
  margin: 10px 0 0;
  max-width: 18ch;
  font-size: clamp(32px, 8.2vw, 76px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.02em;
}

.pn-hero__title span {
  display: inline-block;
  color: var(--winter);
  border-bottom: 6px solid var(--summer);
  padding-bottom: 2px;
}

.pn-lead {
  margin: 20px 0 28px;
  max-width: 60ch;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.85;
}

.pn-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  padding: 16px 0 0;
  border-top: var(--line);
}

.pn-stats .stat {
  border-left: 4px solid var(--winter);
  padding-left: 10px;
}

.pn-stats .stat__value {
  display: block;
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 900;
  line-height: 1.1;
}

.pn-stats .stat__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

/* 筛选带 */
.pn-filters {
  position: sticky;
  top: 0;
  z-index: 6;
  background: var(--paper);
  border-top: var(--line);
  border-bottom: var(--line);
  padding: 10px 0;
}

.pn-filters__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.pn-filters .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pn-filters .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: var(--line);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.pn-filters .filter-btn[aria-pressed="true"] {
  background: var(--hl);
  box-shadow: var(--shadow-soft);
}

.pn-filters .filter-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.pn-filters .filter-btn[aria-pressed="true"] .filter-count {
  color: var(--ink);
}

/* 目录 + 正文流 */
.pn-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(24px, 4vw, 48px) 0 clamp(32px, 5vw, 64px);
}

.pn-rail {
  display: none;
}

.pn-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 5vw, 58px);
  min-width: 0;
}

.pn-section {
  padding-top: 18px;
  border-top: 4px solid var(--winter);
}

.pn-section--spring { border-top-color: var(--spring); }
.pn-section--summer { border-top-color: var(--summer); }
.pn-section--autumn { border-top-color: var(--autumn); }

/* 本季头条 */
.pn-headline {
  border: var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--paper);
  padding-top: 0;
  border-top: var(--line);
}

.pn-headline__head {
  background: var(--winter);
  color: #fff;
  padding: clamp(18px, 3vw, 30px) clamp(18px, 3vw, 34px) clamp(30px, 5vw, 48px);
  clip-path: polygon(0 0, 100% 0, 100% 84%, 0 100%);
}

.pn-headline__head .eyebrow {
  color: rgba(255, 255, 255, .74);
}

.pn-headline__title {
  margin: 8px 0 0;
  max-width: 22ch;
  color: #fff;
  font-size: clamp(24px, 4.4vw, 44px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.01em;
}

.pn-headline__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding: clamp(18px, 3vw, 28px);
}

.pn-headline__text p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
}

.pn-points {
  list-style: none;
  margin: 16px 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.pn-points li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.75;
}

.pn-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 10px;
  height: 10px;
  background: var(--winter);
}

.pn-headline__media,
.pn-chart__media,
.pn-journal__media,
.pn-case__media {
  margin: 0;
}

.pn-media--3x2 { aspect-ratio: 3 / 2; }
.pn-media--wide { aspect-ratio: 5 / 3; }

/* 渠道更新条目 */
.pn-log {
  display: flex;
  flex-direction: column;
}

.pn-log__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px 20px;
  padding: 16px 0;
  border-top: 4px solid var(--winter);
}

.pn-log__row--autumn { border-top-color: var(--autumn); }
.pn-log__row--summer { border-top-color: var(--summer); }
.pn-log__row--spring { border-top-color: var(--spring); }

.pn-log__quarter {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

.pn-log__quarter i {
  display: block;
  margin-top: 4px;
  font-style: normal;
  font-size: 12px;
  color: var(--ink);
}

.pn-log__title {
  margin: 0 0 6px;
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 800;
  line-height: 1.32;
}

.pn-log__text p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
}

/* 季度趋势图 */
.pn-chart-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.pn-chart {
  border: var(--line);
  background: #fff;
  box-shadow: var(--shadow-soft);
  padding: 12px;
}

.pn-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.pn-chart__grid {
  stroke: rgba(20, 22, 26, .16);
  stroke-width: 1;
  stroke-dasharray: 4 6;
}

.pn-chart__axis {
  stroke: var(--ink);
  stroke-width: 2;
}

.pn-chart__bar {
  fill: var(--winter);
  opacity: .82;
  transition: opacity var(--dur) var(--ease);
}

.pn-chart__bar:hover { opacity: 1; }

.pn-chart__line {
  fill: none;
  stroke: var(--summer);
  stroke-width: 3;
  stroke-linejoin: round;
}

.pn-chart__dot {
  fill: var(--paper);
  stroke: var(--summer);
  stroke-width: 3;
}

.pn-chart__label {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--muted);
}

.pn-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.pn-legend__item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.pn-legend__swatch {
  width: 22px;
  height: 6px;
  display: inline-block;
}

.pn-legend__swatch--bar { background: var(--winter); }
.pn-legend__swatch--line { background: var(--summer); height: 4px; }

/* 安装标准更新 */
.pn-std {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.pn-std__item {
  border: var(--line);
  border-top: 6px solid var(--autumn);
  background: var(--paper);
  box-shadow: var(--shadow-soft);
  padding: 14px 16px 18px;
}

.pn-std__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.pn-std__item h3 {
  margin: 8px 0;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.35;
}

.pn-std__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}

/* 案例专题 */
.pn-cases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.pn-case {
  display: flex;
  flex-direction: column;
  border: var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

.pn-case .media-frame {
  border-bottom: var(--line);
}

.pn-case__body {
  padding: 16px 18px 20px;
}

.pn-case__body h3 {
  margin: 10px 0 8px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.32;
}

.pn-case__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}

.pn-more {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.pn-more a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 季刊索引 */
.pn-journal {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.pn-journal__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pn-journal__item {
  border: var(--line);
  border-left-width: 6px;
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.pn-journal__item[open] {
  background: var(--paper);
}

.pn-journal__item--spring { border-left-color: var(--spring); }
.pn-journal__item--summer { border-left-color: var(--summer); }
.pn-journal__item--autumn { border-left-color: var(--autumn); }
.pn-journal__item--winter { border-left-color: var(--winter); }

.pn-journal__item summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.pn-journal__item summary::-webkit-details-marker { display: none; }

.pn-journal__item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 700;
}

.pn-journal__item[open] summary::after { content: "−"; }

.pn-journal__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.pn-journal__item ul {
  margin: 0;
  padding: 0 18px 16px 34px;
  display: grid;
  gap: 7px;
  font-size: 15px;
  line-height: 1.7;
}

/* 结尾 */
.pn-closing {
  padding-top: 0;
  border-top: 0;
}

.pn-closing__box {
  border: var(--line);
  background: var(--winter);
  color: #fff;
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 3.4vw, 36px);
}

.pn-closing__box h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 900;
  line-height: 1.2;
}

.pn-closing__box p {
  margin: 0 0 18px;
  max-width: 62ch;
  line-height: 1.8;
  color: rgba(255, 255, 255, .88);
}

.pn-closing__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pn-btn-light {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--ink);
}

.pn-btn-ghost {
  background: transparent;
  color: #fff;
  border-color: #fff;
}

.pn-closing__contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 20px 0 0;
  font-size: 14px;
}

.pn-copy {
  color: #fff;
  border-color: rgba(255, 255, 255, .7);
}

/* 响应式 */
@media (min-width: 640px) {
  .pn-log__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: start;
  }

  .pn-filters .filter-btn { padding: 8px 14px; }
}

@media (min-width: 720px) {
  .pn-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 780px) {
  .pn-std { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .pn-cases { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .pn-case--feature {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    align-items: stretch;
  }

  .pn-case--feature .media-frame {
    border-bottom: 0;
    border-right: var(--line);
    height: 100%;
  }

  .pn-case--feature .pn-case__body {
    padding: clamp(18px, 3vw, 30px);
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .pn-case--feature .pn-case__body h3 { font-size: clamp(20px, 2.6vw, 26px); }
}

@media (min-width: 860px) {
  .pn-headline__grid {
    grid-template-columns: 1.15fr .85fr;
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .pn-chart-grid {
    grid-template-columns: 1.3fr .7fr;
    align-items: start;
    gap: 24px;
  }

  .pn-journal {
    grid-template-columns: .85fr 1.15fr;
    align-items: start;
    gap: 28px;
  }
}

@media (min-width: 1000px) {
  .pn-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 44px);
  }

  .pn-rail {
    display: block;
    position: sticky;
    top: 84px;
    align-self: start;
  }

  .pn-rail .index-rail__link {
    display: block;
    padding: 6px 0 6px 10px;
    border-left: 3px solid transparent;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--muted);
    text-decoration: none;
  }

  .pn-rail .index-rail__link[aria-current] {
    color: var(--ink);
    border-left-color: var(--winter);
    font-weight: 700;
  }
}
<<<END>>>