.page-news {
  --nf-sec: clamp(52px, 8vw, 104px);
  --nf-card-line: var(--line-light);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-news h1,
.page-news h2,
.page-news h3,
.page-news h4 {
  margin: 0;
}

.page-news p {
  margin: 0;
}

.page-news .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-news .section-no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 84px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--clay);
}

.page-news .nf-sec-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-news .nf-sec-head__lede {
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-news .nf-textlink {
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-news .nf-textlink:hover,
.page-news .nf-textlink:focus-visible {
  color: var(--signal);
  border-color: var(--signal);
}

/* ---------- 首屏 ---------- */
.page-news .nf-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 34px) 0 var(--nf-sec);
  background: var(--ink);
  color: var(--paper);
}

.page-news .nf-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: 52%;
  height: 120%;
  background: var(--ink-soft);
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}

.page-news .nf-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(240px, 40%);
  height: 4px;
  background: var(--signal);
}

.page-news .nf-hero .shell {
  position: relative;
  z-index: 1;
}

.page-news .nf-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(22px, 4vw, 40px);
}

.page-news .nf-hero__lead h1 {
  margin-top: 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(44px, 9.5vw, 96px);
  line-height: 0.98;
  letter-spacing: -0.01em;
}

.page-news .nf-hero__lede {
  max-width: 46ch;
  margin-top: 20px;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.85;
  color: var(--steel);
}

.page-news .nf-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-news .nf-hero__side {
  display: grid;
  gap: 16px;
  align-content: end;
}

.page-news .nf-bignum {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  padding-left: 16px;
  border-left: 2px solid var(--signal);
}

.page-news .nf-bignum__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(72px, 18vw, 140px);
  line-height: 0.8;
  letter-spacing: -0.05em;
  color: var(--signal);
}

.page-news .nf-bignum__label {
  padding-bottom: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-news .nf-hero__figure {
  margin: 0;
  border: 1px solid var(--line-dark);
}

/* ---------- 本期封面 ---------- */
.page-news .nf-cover {
  padding: var(--nf-sec) 0;
  background: var(--paper);
}

.page-news .nf-cover__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-news .nf-cover__head h2 {
  margin-top: 10px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.01em;
}

.page-news .nf-cover__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-news .nf-cover__lede {
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.page-news .nf-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-news .nf-points li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-news .nf-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 9px;
  height: 9px;
  background: var(--signal);
}

.page-news .nf-cover__link {
  margin-top: 26px;
}

.page-news .nf-cover__figure {
  margin: 0;
}

.page-news .nf-cover__figure .media-frame__caption {
  color: var(--slate);
}

.page-news .nf-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin: clamp(28px, 5vw, 46px) 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line-light);
}

.page-news .nf-stats li {
  display: grid;
  gap: 4px;
}

.page-news .nf-stats__num {
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
}

.page-news .nf-stats__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
}

/* ---------- 专题索引 ---------- */
.page-news .nf-index {
  padding: var(--nf-sec) 0;
  background: var(--moss-wash);
  border-top: 1px solid var(--line-light);
}

.page-news .nf-index h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.06;
}

.page-news .nf-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-news .nf-jump a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 13.5px;
  color: var(--ink);
  text-decoration: none;
  background: var(--paper);
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.page-news .nf-jump a:hover,
.page-news .nf-jump a:focus-visible {
  border-color: var(--signal);
  color: var(--clay);
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-news .nf-groups {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
}

.page-news .nf-group {
  scroll-margin-top: 96px;
}

.page-news .nf-group__title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 23px);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-news .nf-group__count {
  font-size: 12px;
  font-weight: 500;
  color: var(--slate);
}

.page-news .nf-series {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .nf-series li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line-light);
  transition: background var(--dur-fast) var(--ease);
}

.page-news .nf-series li:hover {
  background: var(--signal-wash);
}

.page-news .nf-series__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 7px;
}

.page-news .nf-series__time {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--clay);
}

.page-news .nf-series h4 {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
}

.page-news .nf-series p {
  margin-top: 5px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

.page-news .nf-index__more {
  max-width: 62ch;
  margin-top: clamp(26px, 4vw, 40px);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 规则图解 ---------- */
.page-news .nf-diagrams {
  padding: var(--nf-sec) 0;
  background: var(--ink);
  color: var(--paper);
}

.page-news .nf-diagrams h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.06;
}

.page-news .nf-diagrams .nf-sec-head__lede {
  color: var(--steel);
}

.page-news .nf-diagrams__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-news .nf-diagrams__figure {
  margin: 0;
  border: 1px solid var(--line-dark);
}

.page-news .nf-rules {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-news .nf-rule {
  border: 1px solid var(--line-dark);
  background: rgba(199, 208, 202, 0.04);
  transition: border-color var(--dur-base) var(--ease), background var(--dur-base) var(--ease);
}

.page-news .nf-rule:hover {
  border-color: var(--line-dark-strong);
}

.page-news .nf-rule[open] {
  border-color: var(--signal);
  background: rgba(199, 208, 202, 0.07);
}

.page-news .nf-rule summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-news .nf-rule summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--signal);
}

.page-news .nf-rule[open] summary::after {
  content: "−";
}

.page-news .nf-rule summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-news .nf-rule__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ember);
}

.page-news .nf-rule__title {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
}

.page-news .nf-rule__body {
  padding: 0 16px 18px;
  border-top: 1px solid var(--line-dark);
}

.page-news .nf-steps {
  display: grid;
  gap: 9px;
  margin: 14px 0 0;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--steel);
}

.page-news .nf-rule__tip {
  margin-top: 14px;
  padding: 10px 12px;
  border-left: 2px solid var(--signal);
  background: var(--signal-wash);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--paper);
}

/* ---------- 更新日志 ---------- */
.page-news .nf-updates {
  padding: var(--nf-sec) 0;
  background: var(--paper);
}

.page-news .nf-updates__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-news .nf-updates h2 {
  margin-top: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.06;
}

.page-news .nf-updates__lede {
  margin-top: 16px;
  max-width: 42ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-news .nf-feed {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .nf-feed li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-light);
}

.page-news .nf-feed__when {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--clay);
}

.page-news .nf-feed__text strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
}

.page-news .nf-feed__text p {
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

.page-news .nf-archive {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line-light);
}

.page-news .nf-archive summary {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--clay);
  cursor: pointer;
  list-style: none;
}

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

.page-news .nf-archive summary::after {
  content: "＋";
  font-family: var(--font-mono);
  color: var(--signal);
}

.page-news .nf-archive[open] summary::after {
  content: "－";
}

.page-news .nf-archive summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.page-news .nf-feed--past li {
  border-bottom-style: dashed;
}

/* ---------- 深度阅读 ---------- */
.page-news .nf-longread {
  padding: var(--nf-sec) 0;
  background: linear-gradient(180deg, var(--paper) 0%, #EFE7D6 100%);
  border-top: 1px solid var(--line-light);
}

.page-news .nf-longread__figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-news .nf-longread .prose {
  max-width: 720px;
  margin: 0 auto;
}

.page-news .nf-article h2 {
  margin-top: 10px;
  font-family: var(--font-editorial);
  font-weight: 700;
  font-size: clamp(28px, 4.2vw, 42px);
  line-height: 1.24;
  letter-spacing: 0.01em;
}

.page-news .nf-article h3 {
  margin: 30px 0 10px;
  font-family: var(--font-editorial);
  font-weight: 700;
  font-size: clamp(19px, 2.5vw, 24px);
  line-height: 1.4;
  color: var(--ink);
}

.page-news .nf-article p {
  margin-top: 14px;
  font-size: 16.5px;
  line-height: 1.95;
  color: var(--ink-soft);
}

.page-news .nf-article > p:first-of-type {
  font-size: 17.5px;
  color: var(--ink);
}

/* ---------- 共建 ---------- */
.page-news .nf-join {
  position: relative;
  padding: var(--nf-sec) 0;
  background: var(--ink);
  color: var(--paper);
}

.page-news .nf-join::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--signal) 0 42%, var(--clay) 42% 62%, transparent 62%);
}

.page-news .nf-join__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-news .nf-join h2 {
  margin-top: 10px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.06;
}

.page-news .nf-join__lede {
  margin-top: 16px;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--steel);
}

.page-news .nf-join__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 24px;
  font-size: 14.5px;
}

.page-news .nf-join__links .nf-textlink {
  color: var(--ember);
}

.page-news .nf-join__links .nf-textlink:hover,
.page-news .nf-join__links .nf-textlink:focus-visible {
  color: var(--signal);
}

.page-news .nf-join__card {
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line-dark-strong);
  background: rgba(245, 240, 228, 0.05);
}

.page-news .nf-join__line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: 14.5px;
}

.page-news .nf-join__label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-news .nf-join__value {
  color: var(--paper);
}

.page-news .nf-join__note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--steel);
}

.page-news .nf-join__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-news .nf-feed li {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
  }

  .page-news .nf-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-news .nf-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 44px;
  }

  .page-news .nf-groups > .nf-group:nth-child(even) {
    padding-top: 46px;
  }

  .page-news .nf-cover__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-news .nf-updates__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-news .nf-join__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-news .nf-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }

  .page-news .nf-diagrams__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .nf-textlink,
  .page-news .nf-jump a,
  .page-news .nf-series li,
  .page-news .nf-rule {
    transition: none;
  }
}