/* ============================================================
   News Detail — 文章详情页
   Figma: #662:27563 News-Detail
   news-detail#section #662:27624 (1920×2900) 渐变 -46deg 白→浅蓝
   结构：面包屑 → 标题 → 日期 → 5px 分隔线 → Reading Guide 蓝底引文
         → 正文（32px #666 + 蓝色 ExtraBold 小标题）→ Previous/Next 导航
   ============================================================ */

.nd-detail {
  position: relative;
  width: 100%;
  background: linear-gradient(-46deg, var(--color-white) 0%, var(--color-soft-blue) 100%);
  padding: 0 var(--container-padding) 110px;
  overflow: hidden;
  box-sizing: border-box;
}

.nd-detail__inner {
  position: relative;
  max-width: 1420px;               /* 1920 - 250×2 = 1420 */
  margin: 0 auto;
}

/* --- 面包屑（设计稿 @54,59，18px var(--color-primary)） --- */
.nd-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 120px 0 0;
}

.nd-crumb__home {
  display: inline-flex;
  align-items: center;
}

.nd-crumb__home img {
  display: block;
  width: 21px;
  height: 20px;
}

.nd-crumb__arrow {
  display: block;
  width: 7px;
  height: 14px;
}

.nd-crumb__link {
  font-family: var(--font-primary);
  font-size: clamp(1rem, 0.08vw + 0.98rem, 1.125rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  text-decoration: none;
}

.nd-crumb__link--current {
  color: var(--color-primary);
  max-width: min(52vw, 720px);      /* 长文章标题截断省略，避免撑破面包屑 */
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- 标题（设计稿 @180,187，1560 宽 76px ExtraBold var(--color-primary) 居中） --- */
.nd-title {
  font-family: var(--font-primary);
  font-size: min(3.167vw, 3.75rem);
  font-weight: 600;
  line-height: min(3.75vw, 4.5rem);
  letter-spacing: -0.02em;
  color: var(--color-primary);
  text-align: center;
  margin: min(2.604vw, 50px) auto 0;   /* 187-59-90 标题上缘相对面包屑的余量 */
  max-width: 1560px;
}

/* --- 日期（设计稿 @839,437，28px #666 居中）；动态效果同标题（m-anim-title 词级揭示） --- */
.nd-date {
  display: block;
  font-family: var(--font-primary);
  font-size: min(1.667vw, 1.75rem);
  font-weight: 300;
  line-height: min(2.5vw, 2.75rem);
  letter-spacing: -0.02em;
  color: var(--color-text-secondary);
  text-align: center;
  margin: min(2.6vw, 50px) auto 0;
}

/* --- 分隔线（设计稿 1640×5） --- */
.nd-rule {
  display: none;   /* 移除灰色分隔线：其占位（margin-top 94px + 高 5px）消失，下方内容整体上移 99px ≈ 100px */
}

/* --- 正文容器（设计稿 @140,686） --- */
.nd-body {
  margin: min(3.65vw, 70px) auto 0;   /* 686-581-5 = 100 */
}

/* Reading Guide（设计稿 1640×238 蓝底 + 引文 @70,47 32px #666） */
.nd-guide {
  position: relative;
  width: 100%;
  aspect-ratio: 1640 / 238;
  background: url(../images/news-detail-guide-bg.png) no-repeat center / cover;
}

.nd-guide__text {
  position: absolute;
  left: 4.27%;                        /* 70/1640 */
  top: 19.75%;                        /* 47/238 */
  width: 92.87%;                      /* 1523/1640 */
  font-family: var(--font-primary);
  font-size: min(1.333vw, 1.375rem);
  font-weight: 300;
  line-height: min(2vw, 2.125rem);
  letter-spacing: -0.02em;
  color: var(--color-text-secondary);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 正文（设计稿 @0,288 起，32px #666，蓝色 ExtraBold 小标题） */
.nd-copy {
  margin-top: min(3vw, 50px);
  font-family: var(--font-primary);
  font-size: min(1.333vw, 1.375rem);
  font-weight: 300;
  line-height: min(2vw, 2.125rem);
  letter-spacing: -0.02em;
  color: var(--color-text-secondary);
}

.nd-copy p {
  margin: 0 0 1.5em;
}

.nd-copy__title {
  font-family: var(--font-primary);
  font-size: min(1.333vw, 1.375rem);
  font-weight: 600;
  line-height: min(2vw, 2.125rem);
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin: 0 0 0.25em;
}

/* 文章内图片组 → 轮播卡片 */
.nd-carousel {
  width: min(667px, 100%);
  margin: min(3vw, 50px) auto;
}

.nd-carousel__viewport {
  overflow: hidden;
}

/* 轨道：横向排列，JS 控制 translateX 切换 */
.nd-images {
  display: flex;
  transition: transform var(--duration-slow, 500ms) var(--ease-standard);
}

.nd-images__item {
  flex: 0 0 100%;
  margin: 0;
}

.nd-carousel__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 16px;
}

.nd-carousel__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 35px;
  height: 35px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: 0;               /* 六边形箭头，不需要圆角 */
}

.nd-carousel__btn img {
  width: 100%;
  height: 100%;
  object-fit: fill;
  display: block;
  transition: filter var(--duration-base) var(--ease-standard);
}

.nd-carousel__btn:hover img {
  filter: brightness(0.85);
}

.nd-carousel__btn:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

.nd-carousel__dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nd-carousel__dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--color-dot);
  cursor: pointer;
  transition: background var(--duration-base) var(--ease-standard);
}

.nd-carousel__dot.is-active {
  background: var(--color-secondary);  /* #A8CE50 */
}

.nd-images__media {
  height: 500px;   /* 固定高度（替代原 4:3 / 16:9 比例） */
  background: var(--color-soft-blue);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.nd-images__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 图注行：固定不随轮播滑动，文字由 JS 随当前卡切换 */
.nd-carousel__caption {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-family: var(--font-primary);
  font-size: min(1.333vw, 1.375rem);
  font-weight: 300;
  line-height: min(2vw, 2.125rem);
  letter-spacing: -0.02em;
  color: var(--color-text-secondary);
}

.nd-carousel__caption-text {
  transition: opacity var(--duration-base) var(--ease-standard);
}

.nd-images__pin {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nd-images__pin svg {
  width: 18px;
  height: 20px;
}

/* --- Previous / Next 导航（设计稿 @140,2684，1640 宽上分隔线） --- */
.nd-nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: min(3.65vw, 70px);
  padding-top: 40px;
  border-top: 1px solid var(--color-placeholder);
}

.nd-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  font-family: var(--font-primary);
  font-size: min(1.333vw, 1.375rem);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color var(--duration-base) var(--ease-standard);
}

.nd-nav__link:hover {
  color: var(--color-secondary);
}

.nd-nav__link--next {
  flex-direction: row;
}

.nd-nav__arrow {
  display: block;
  flex-shrink: 0;
  overflow: visible;
  width: 0.93em;
  height: 0.7em;
  transform: scale(0.85);
}

.nd-nav__arrow path {
  stroke: var(--color-text-muted);
  transition: stroke var(--duration-base) var(--ease-standard);
}

.nd-nav__link:hover .nd-nav__arrow path {
  stroke: var(--color-secondary);
}

/* ==================== 响应式 ==================== */
@media (max-width: 1200px) {
  .nd-detail {
    padding-bottom: 80px;
  }

  .nd-title {
    font-size: clamp(1.5rem, 0.65vw + 1.35rem, 2.5rem);
    line-height: 1.15;
  }

  .nd-date {
    font-size: 1rem;
    line-height: 1.5;
  }

  .nd-guide__text,
  .nd-copy,
  .nd-copy__title {
    font-size: clamp(0.75rem, 0.04vw + 0.74rem, 0.8125rem);
    line-height: 1.5;
  }

  .nd-nav__link {
    font-size: clamp(0.75rem, 0.04vw + 0.74rem, 0.8125rem);
    line-height: 1.5;
  }
}

@media (max-width: 768px) {
  .nd-detail {
    padding-left: 21px;
    padding-right: 21px;
    padding-bottom: 56px;
  }

  .nd-guide {
    aspect-ratio: auto;
    min-height: auto;
    padding: 15px 24px 15px 28px;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    background-image: none;
    background-color: var(--color-soft-blue);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
  }

  .nd-guide__text {
    position: static;
    width: 91%;
    margin: 0 auto;
    display: block;
    -webkit-line-clamp: unset;
    -webkit-box-orient: unset;
    overflow: visible;
  }

  .nd-images__media {
    height: 270px;   /* 移动端轮播图高度（PC 端固定 500px 不变） */
  }

  .nd-carousel__caption {
    font-size: clamp(0.875rem, 0.04vw + 0.86rem, 1rem);
    line-height: 1.5;
  }

  .nd-crumb {
    padding-top: 80px;
  }

  .nd-title {
    font-size: clamp(1.5rem, 0.57vw + 1.37rem, 2.375rem);
    line-height: 1.25;
    margin-top: 30px;
  }

  .nd-date {
    font-size: clamp(0.8125rem, 0.04vw + 0.8rem, 0.875rem);
    line-height: 1.5;
  }

  .nd-guide__text,
  .nd-copy,
  .nd-copy__title {
    font-size: clamp(0.875rem, 0.04vw + 0.86rem, 1rem);
    line-height: 1.5;
  }

  .nd-nav__link {
    font-size: clamp(0.875rem, 0.04vw + 0.86rem, 1rem);
    line-height: 1.5;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .nd-title {
    font-size: clamp(1.25rem, 0.48vw + 1.14rem, 2rem);
    line-height: 1.25;
  }

  /* Previous/Next 保持与上一行两端同行排布（移动端不堆叠） */
  .nd-nav {
    flex-direction: row;
    align-items: center;
    gap: 0;
  }

  .nd-nav__link--next {
    flex-direction: row;
    align-self: auto;
  }
}

/* PC端：导航背景透明，文字保持深色 */
@media (min-width: 993px) {
  .navbar {
    background: rgba(255, 255, 255, 0) !important;
  }

  .navbar.scrolled {
    background: rgba(255, 255, 255, 1) !important;
  }

  .navbar__menu-item > a {
    color: #333333 !important;
  }

  .navbar__brochure {
    color: #333333 !important;
  }

  .navbar__brochure .navbar__icon path {
    fill: #333333 !important;
  }

  .navbar__divider {
    background: var(--color-divider) !important;
  }

  .navbar__lang {
    color: #333333 !important;
  }

  .navbar__lang .navbar__icon path {
    fill: #333333 !important;
  }
}

/* ==================== PC 端：标题与日期间距 ==================== */
/* 仅 PC（>768）实际间距固定 10px；≤768 移动端保持原 margin min(2.6vw, 50px) 不变。
   标题动画层 .m-line 自带 margin-bottom:-0.1em（防 descender 裁切），会折叠抵消 0.1×标题字号（4~6px），
   故 margin 需补偿：10px + 0.1×min(3.167vw, 3.75rem)，保证盒间距恰为 10px */
@media (min-width: 769px) {
  .nd-date {
    margin-top: calc(10px + 0.1 * min(3.167vw, 3.75rem));
  }
}

/* ==================== 无障碍降级 ==================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}