/* 新闻动态 - news_center.html (设计基准 1920px) */

:root {
  --nc-primary: #14126f;
  --nc-accent: #1bb8ce;
  --nc-text: #333333;
  --nc-text-muted: #666666;
  --nc-text-light: #999999;
  --nc-line: #e5e5e5;
  --nc-font-hero: clamp(32px, 3.125vw, 60px);
}

.site-main--nc {
  min-height: auto;
  overflow: hidden;
}

/* ========== Hero ========== */

.nc-hero {
  position: relative;
  min-height: clamp(320px, 33.854vw, 650px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #0a1a4a;
}

.nc-hero__bg {
  position: absolute;
  inset: 0;
}

.nc-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.nc-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(10, 26, 74, 0.55) 0%,
    rgba(10, 26, 74, 0.22) 50%,
    rgba(10, 26, 74, 0.08) 100%
  );
}

.nc-hero__inner {
  position: relative;
  z-index: 1;
  padding: clamp(48px, 5.208vw, 100px) 0;
}

.nc-hero__title {
  margin: 0;
  font-size: var(--nc-font-hero);
  font-weight: 600;
  line-height: 1.2;
  color: #ffffff;
}

.nc-hero__desc {
  margin: clamp(16px, 1.458vw, 28px) 0 0;
  max-width: 34em;
  font-size: clamp(14px, 0.9375vw, 18px);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.92);
}

.nc-hero__scroll {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(48px, 3.125vw, 60px);
  height: clamp(48px, 3.125vw, 60px);
  margin-top: clamp(28px, 2.5vw, 48px);
  color: var(--nc-primary);
  background: #ffffff;
  border: none;
  border-radius: 50%;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

.nc-hero__scroll:hover {
  transform: translateY(3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.14);
}

.nc-hero__scroll-icon {
  display: block;
  width: clamp(14px, 0.885vw, 17px);
  height: clamp(14px, 0.885vw, 17px);
}

/* ========== Breadcrumb ========== */

.nc-intro {
  padding: clamp(32px, 2.917vw, 56px) 0 0;
  background: #ffffff;
}

.nc-breadcrumb {
  margin: 0;
  font-size: clamp(13px, 0.8333vw, 16px);
  line-height: 1.6;
  color: var(--nc-text-light);
}

.nc-breadcrumb a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nc-breadcrumb a:hover {
  color: var(--nc-accent);
}

.nc-breadcrumb [aria-current="page"] {
  color: var(--nc-text-muted);
}

.nc-breadcrumb__sep {
  margin: 0 0.35em;
}

/* ========== Main layout ========== */

.nc-main {
  padding: clamp(28px, 2.5vw, 48px) 0 clamp(64px, 5.729vw, 110px);
  background: #ffffff;
}

.nc-main__layout {
  display: grid;
  grid-template-columns: minmax(200px, 300px) minmax(0, 1fr);
  gap: clamp(36px, 4.167vw, 80px);
  align-items: start;
}

/* ========== Sidebar ========== */

.nc-sidebar {
  min-width: 0;
}

.nc-sidebar__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0 0 clamp(14px, 1.042vw, 20px);
  border-bottom: 1px solid var(--nc-line);
  text-align: left;
  cursor: pointer;
}

.nc-sidebar__title {
  font-size: clamp(16px, 1.042vw, 20px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--nc-text);
}

.nc-sidebar__chevron {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-right: 1.5px solid #999;
  border-bottom: 1.5px solid #999;
  transform: rotate(-135deg);
  transition: transform 0.25s ease;
}

.nc-sidebar__toggle[aria-expanded="false"] .nc-sidebar__chevron {
  transform: rotate(45deg);
  margin-top: -4px;
}

.nc-sidebar__panel {
  overflow: hidden;
  transition:
    max-height 0.3s ease,
    opacity 0.25s ease;
  max-height: 320px;
  opacity: 1;
}

.nc-sidebar__panel.is-collapsed {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
}

.nc-cat {
  margin: clamp(16px, 1.25vw, 24px) 0 0;
  padding: 0;
  list-style: none;
}

.nc-cat > li + li {
  margin-top: clamp(12px, 0.833vw, 16px);
}

.nc-cat__item {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.nc-cat__item input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  margin: 0;
}

.nc-cat__box {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  border: 1px solid #cccccc;
  border-radius: 2px;
  background: #ffffff;
  position: relative;
  transition:
    background 0.2s ease,
    border-color 0.2s ease;
}

.nc-cat__item input:checked + .nc-cat__box {
  background: #333333;
  border-color: #333333;
}

.nc-cat__item input:checked + .nc-cat__box::after {
  content: "";
  position: absolute;
  left: 4.5px;
  top: 1.5px;
  width: 4px;
  height: 8px;
  border: solid #ffffff;
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(45deg);
}

.nc-cat__item input:focus-visible + .nc-cat__box {
  outline: 2px solid var(--nc-accent);
  outline-offset: 2px;
}

.nc-cat__label {
  font-size: clamp(14px, 0.8333vw, 16px);
  color: var(--nc-text);
  line-height: 1.4;
}

.nc-cat__count {
  font-size: clamp(13px, 0.781vw, 15px);
  color: var(--nc-text-light);
  line-height: 1.4;
}

/* ========== News list ========== */

.nc-list-wrap {
  min-width: 0;
}

.nc-list {
  display: flex;
  flex-direction: column;
}

.nc-card__link {
  display: flex;
  gap: clamp(28px, 3.333vw, 64px);
  align-items: stretch;
  padding: clamp(24px, 2.083vw, 40px) 0 0;
  text-decoration: none;
  color: inherit;
}

.nc-card__media {
  flex: 0 0 clamp(200px, 22.5vw, 432px);
  width: clamp(200px, 22.5vw, 432px);
  overflow: hidden;
  background: #f0f0f0;
  align-self: flex-start;
}

.nc-card__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 432 / 300;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.nc-card__link:hover .nc-card__media img {
  transform: scale(1.03);
}

.nc-card__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  align-self: stretch;
  /* 与左侧 432×300 图片同高，使底部分割线与图片底边对齐 */
  min-height: calc(clamp(200px, 22.5vw, 432px) * 300 / 432);
  border-bottom: 1px solid var(--nc-line);
}

.nc-card__date {
  display: block;
  margin: 0;
  font-size: clamp(13px, 0.8333vw, 16px);
  line-height: 1.4;
  color: var(--nc-accent);
}

.nc-card__title {
  margin: clamp(8px, 0.625vw, 12px) 0 0;
  font-size: clamp(16px, 1.042vw, 20px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--nc-text);
  transition: color 0.2s ease;
}

.nc-card__link:hover .nc-card__title {
  color: var(--nc-primary);
}

.nc-card__excerpt {
  margin: clamp(10px, 0.833vw, 16px) 0 0;
  font-size: clamp(13px, 0.8333vw, 16px);
  line-height: 1.75;
  color: var(--nc-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.nc-card__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  margin-top: clamp(12px, 1.042vw, 16px);
  border-radius: 50%;
  background: #dddddd;
  transition: background 0.25s ease;
}

.nc-card__link:hover .nc-card__arrow {
  background: var(--nc-primary);
}

.nc-card__arrow img {
  width: auto;
  height: clamp(8px, 0.521vw, 10px);
  filter: brightness(0) invert(1);
}

/* ========== Pagination ========== */

.nc-pagination {
  --nc-pagination-size: clamp(36px, 2.083vw, 40px);
  --nc-pagination-radius: 4px;
  --nc-pagination-border: #dddddd;
  --nc-pagination-gap: clamp(8px, 0.625vw, 12px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  margin-top: clamp(40px, 3.333vw, 64px);
}

.nc-pagination__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--nc-pagination-gap);
}

.nc-pagination__btn,
.nc-pagination__page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  min-width: var(--nc-pagination-size);
  height: var(--nc-pagination-size);
  padding: 0;
  font-size: clamp(14px, 0.8333vw, 16px);
  color: var(--nc-text-muted);
  background: #ffffff;
  border: 1px solid var(--nc-pagination-border);
  border-radius: var(--nc-pagination-radius);
  cursor: pointer;
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

.nc-pagination__btn {
  width: var(--nc-pagination-size);
}

.nc-pagination__page:hover:not(.is-active) {
  color: var(--nc-accent);
  border-color: var(--nc-accent);
}

.nc-pagination__btn:hover:not(:disabled) {
  color: var(--nc-accent);
  border-color: var(--nc-accent);
}

.nc-pagination__btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.nc-pagination__icon {
  display: block;
  width: clamp(12px, 0.781vw, 15px);
  height: auto;
  filter: brightness(0);
  opacity: 0.45;
  transition: opacity 0.2s ease;
}

.nc-pagination__btn:hover:not(:disabled) .nc-pagination__icon {
  opacity: 0.7;
}

.nc-pagination__btn--prev .nc-pagination__icon {
  transform: scaleX(-1);
}

.nc-pagination__pages {
  display: flex;
  align-items: center;
  gap: var(--nc-pagination-gap);
}

.nc-pagination__page.is-active {
  font-weight: 600;
  color: #ffffff;
  background: var(--nc-accent);
  border-color: var(--nc-accent);
  cursor: default;
}

.nc-pagination__page.is-active:hover {
  color: #ffffff;
  border-color: var(--nc-accent);
}

.nc-pagination__back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  min-height: var(--nc-pagination-size);
  padding: 0 clamp(16px, 1.042vw, 20px);
  font-size: clamp(14px, 0.8333vw, 16px);
  font-weight: 500;
  line-height: 1;
  color: var(--nc-text-muted);
  text-decoration: none;
  white-space: nowrap;
  background: #ffffff;
  border: 1px solid var(--nc-pagination-border);
  border-radius: var(--nc-pagination-radius);
  transition:
    color 0.2s ease,
    border-color 0.2s ease;
}

.nc-pagination__back:hover {
  color: var(--nc-accent);
  border-color: var(--nc-accent);
}

/* ========== Responsive ========== */

@media (max-width: 991px) {
  .nc-main__layout {
    grid-template-columns: 1fr;
    gap: clamp(24px, 4vw, 36px);
  }

  .nc-sidebar {
    max-width: 360px;
  }

  .nc-card__link {
    gap: 20px;
  }

  .nc-card__media {
    flex-basis: 42%;
    width: 42%;
  }

  .nc-card__body {
    /* 跟随左侧图片高度（stretch），不再写死桌面端比例 */
    min-height: 0;
  }
}

@media (max-width: 767px) {
  .nc-hero {
    min-height: 280px;
  }

  .nc-card__link {
    flex-direction: column;
  }

  .nc-card__media {
    flex-basis: auto;
    width: 100%;
    align-self: stretch;
  }

  .nc-card__body {
    min-height: 0;
    padding-bottom: clamp(20px, 4vw, 28px);
  }

  .nc-pagination__group {
    gap: 8px;
  }

  .nc-pagination__back {
    width: 100%;
    margin-top: 4px;
  }
}