.page-news {
  --n-card-bg: rgba(20, 28, 75, .58);
  --n-card-bg-hover: rgba(20, 28, 75, .92);
  --n-shadow: rgba(8, 40, 43, .9);
  --n-rule: rgba(90, 102, 143, .34);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-news .news-mast {
  position: relative;
  padding: clamp(18px, 3.4vw, 34px) 0 clamp(26px, 5vw, 56px);
  overflow: hidden;
}

.page-news .news-mast::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: min(420px, 60vw);
  background:
    radial-gradient(58% 100% at 10% 0%, rgba(43, 240, 208, .18), transparent 68%),
    radial-gradient(52% 100% at 92% 12%, rgba(255, 107, 44, .16), transparent 70%);
  pointer-events: none;
}

.page-news .news-mast__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 32px);
}

.page-news .news-mast__main {
  min-width: 0;
}

.page-news .news-mast__title {
  margin: 12px 0 0;
  font-size: clamp(46px, 12vw, 96px);
  font-weight: 300;
  line-height: .94;
  letter-spacing: -.03em;
  color: var(--text);
}

.page-news .news-mast__title::after {
  content: "";
  display: block;
  width: clamp(64px, 16vw, 148px);
  height: 4px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.page-news .news-mast__lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.95;
  color: var(--text-body);
}

.page-news .news-mast__lede--dim {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-news .news-mast__aside {
  align-self: start;
  display: grid;
  gap: 0;
  padding: 4px 18px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  box-shadow: 6px 6px 0 -1px var(--n-shadow);
}

.page-news .news-aside__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
}

.page-news .news-aside__row--last {
  border-bottom: 0;
}

.page-news .news-aside__key {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-mute);
}

.page-news .news-aside__val {
  font-size: 13px;
  color: var(--amber);
  text-align: right;
}

.page-news .news-mast__shot {
  margin-top: clamp(22px, 3.6vw, 44px);
}

/* ---------- 筛选与索引层 ---------- */
.page-news .news-index {
  position: relative;
  margin-top: clamp(10px, 2vw, 22px);
}

.page-news .news-filter {
  position: sticky;
  top: 0;
  z-index: 4;
  padding: 12px 0;
  background: linear-gradient(180deg, var(--bg) 72%, rgba(10, 16, 48, 0));
  border-bottom: 1px solid var(--line);
}

.page-news .news-board {
  display: grid;
  gap: clamp(34px, 6vw, 72px);
  padding-top: clamp(26px, 4.4vw, 52px);
}

/* ---------- 栏目块 ---------- */
.page-news .news-block {
  position: relative;
  min-width: 0;
}

.page-news .news-block::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 3px;
  height: 44px;
  background: var(--slate);
}

.page-news .news-block--c1::before { background: var(--cyan); }
.page-news .news-block--c2::before { background: var(--amber); }
.page-news .news-block--c3::before { background: var(--orange); }
.page-news .news-block--c4::before { background: var(--cyan-soft); }
.page-news .news-block--rhythm::before { background: var(--amber); }

.page-news .news-block__head {
  padding-left: 18px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-news .news-block__title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 300;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--text);
  max-width: 24ch;
}

.page-news .news-block__note {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 卡片网格 ---------- */
.page-news .news-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2vw, 20px);
}

.page-news .news-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 16px 18px 18px;
  min-width: 0;
  background: var(--n-card-bg);
  border: 1px solid var(--n-rule);
  border-left: 3px solid var(--slate);
  box-shadow: 5px 5px 0 -1px var(--n-shadow);
  transition: transform var(--dur) var(--ease),
              background var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.page-news .news-card:hover,
.page-news .news-card:focus-within {
  transform: translateY(-3px);
  background: var(--n-card-bg-hover);
  box-shadow: 9px 9px 0 -1px var(--n-shadow);
}

.page-news .news-card[data-tags="功能"] { border-left-color: var(--cyan); }
.page-news .news-card[data-tags="数据"] { border-left-color: var(--amber); }
.page-news .news-card[data-tags="规则"] { border-left-color: var(--slate); }
.page-news .news-card[data-tags="体验"] { border-left-color: var(--orange); }
.page-news .news-card[data-tags="合作"] { border-left-color: var(--cyan-soft); }

.page-news .news-card__toprow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.page-news .news-card__when {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--text-mute);
  padding: 3px 8px;
  border: 1px solid var(--line-soft);
}

.page-news .news-card__when::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 6px;
  border-radius: 50%;
  background: currentColor;
  vertical-align: 1px;
}

.page-news .tag--ghost {
  color: var(--silver);
  border-color: var(--line-strong);
  background: transparent;
}

.page-news .tag--amber {
  color: var(--ink-900);
  background: var(--amber);
  border-color: var(--amber);
}

.page-news .news-card__title {
  margin: 2px 0 0;
  font-size: clamp(17px, 1.9vw, 20px);
  font-weight: 400;
  line-height: 1.5;
  color: var(--text);
}

.page-news .news-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-body);
}

.page-news .news-card__fold {
  margin-top: 2px;
  border-top: 1px dashed var(--line-soft);
}

.page-news .news-card__fold .fold__summary {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-news .news-card__fold .fold__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-dim);
}

/* ---------- 配图 ---------- */
.page-news .news-media {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
}

.page-news .news-media .shot {
  margin: 0;
}

.page-news .news-media .shot__caption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-mute);
}

/* ---------- 节奏轨道 ---------- */
.page-news .news-track {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 48px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  counter-reset: none;
}

.page-news .news-track__step {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--surface-2);
  border: 1px solid var(--n-rule);
  border-top: 3px solid var(--cyan);
}

.page-news .news-track__step:nth-child(2) { border-top-color: var(--amber); }
.page-news .news-track__step:nth-child(3) { border-top-color: var(--orange); }

.page-news .news-track__num {
  display: block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--text-mute);
}

.page-news .news-track__title {
  margin: 8px 0 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 400;
  line-height: 1.4;
  color: var(--text);
}

.page-news .news-track__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-body);
}

/* ---------- 标签图例 ---------- */
.page-news .news-legend {
  padding: clamp(18px, 2.6vw, 28px);
  background: linear-gradient(135deg, rgba(20, 28, 75, .9), rgba(10, 16, 48, .6));
  border: 1px solid var(--line);
}

.page-news .news-legend__title {
  margin: 0 0 16px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--text-dim);
}

.page-news .news-legend__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-news .news-legend__item {
  display: grid;
  grid-template-columns: 10px minmax(48px, auto) 1fr;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: rgba(10, 16, 48, .5);
  border: 1px solid var(--line-soft);
}

.page-news .news-legend__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--slate);
}

.page-news .news-legend__item[data-tags="功能"] .news-legend__dot { background: var(--cyan); }
.page-news .news-legend__item[data-tags="数据"] .news-legend__dot { background: var(--amber); }
.page-news .news-legend__item[data-tags="规则"] .news-legend__dot { background: var(--silver); }
.page-news .news-legend__item[data-tags="体验"] .news-legend__dot { background: var(--orange); }
.page-news .news-legend__item[data-tags="合作"] .news-legend__dot { background: var(--cyan-soft); }

.page-news .news-legend__name {
  font-size: 14px;
  color: var(--text);
}

.page-news .news-legend__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-mute);
}

/* ---------- 后续选题 ---------- */
.page-news .news-next {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--surface-2);
  border: 1px dashed var(--line);
}

.page-news .news-next__title {
  margin: 0 0 14px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 400;
  color: var(--cyan);
}

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

.page-news .news-next__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-body);
}

.page-news .news-next__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 12px;
  height: 2px;
  background: var(--orange);
}

.page-news .news-next__foot {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-news .news-next__foot .link-arrow {
  margin: 0 4px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-news .news-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-news .news-mast__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .68fr);
    align-items: start;
  }

  .page-news .news-mast__aside {
    margin-top: 34px;
  }

  .page-news .news-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 1080px) {
  .page-news .news-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-news .news-block__head {
    padding-left: 22px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-news .news-card {
    transition: background var(--dur) var(--ease);
  }

  .page-news .news-card:hover,
  .page-news .news-card:focus-within {
    transform: none;
  }
}