/* 客户案例列表页 — 主色 #00378b / 深绿 #002a6b */
body.case-studies-page {
  background: var(--home-color-surface, #f9fafb);
}

.case-studies-page main.site-main {
  padding-bottom: 0;
}

.cs-page,
.case-studies-main {
  --cs-primary: var(--theme-default-color, #00378b);
  --cs-primary-dark: var(--home-color-primary-dark, #002a6b);
  --cs-primary-soft: color-mix(in srgb, var(--cs-primary) 10%, transparent);
  --cs-text: #101828;
  --cs-text-soft: #4a5565;
  --cs-text-muted: #6a7282;
  --cs-border: #e5e7eb;
  --cs-surface: #f3f4f6;
  --cs-white: #fff;
  --cs-shell: var(--site-content-shell);
  color: var(--cs-text);
}

/* 顶部 Banner */
.cs-hero {
  position: relative;
  min-height: var(--site-page-hero-min-height, 72vh);
  overflow: hidden;
  color: #fff;
  background: var(--cs-primary);
}

.cs-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    color-mix(in srgb, var(--cs-primary) 55%, transparent) 0%,
    color-mix(in srgb, var(--cs-primary) 18%, transparent) 42%,
    rgba(10, 22, 40, 0.62) 100%
  );
  pointer-events: none;
  z-index: 1;
}

.cs-hero-media {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}

.cs-hero-media--fallback {
  background: radial-gradient(circle at 72% 18%, color-mix(in srgb, var(--cs-primary) 28%, transparent), transparent 42%),
    linear-gradient(115deg, #05080d 0%, #101828 55%, #0a1628 100%);
}

.cs-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(5, 8, 13, 0.72) 0%,
    rgba(16, 24, 40, 0.35) 52%,
    rgba(16, 24, 40, 0.45) 100%
  );
  pointer-events: none;
  z-index: 1;
}

.cs-hero-container {
  position: relative;
  z-index: 2;
  width: var(--cs-shell);
  margin: 0 auto;
}

/* 精选轮播 */
.cs-featured {
  width: 100%;
  margin: 0 0 48px;
}

.cs-featured__shell {
  display: none;
  position: relative;
  grid-template-columns: 1fr;
  background: var(--cs-white);
  border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--cs-primary) 12%, var(--cs-border));
  box-shadow: 0 10px 36px rgba(0, 146, 216, 0.08);
  overflow: hidden;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.cs-featured__shell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cs-primary) 0%, #00a8e8 100%);
  z-index: 2;
}

.cs-featured__shell.is-active {
  display: grid;
}

@media (min-width: 960px) {
  .cs-featured__shell {
    grid-template-columns: 1.15fr 1fr;
    min-height: 360px;
  }
}

.cs-featured__media {
  position: relative;
  aspect-ratio: 3 / 2;
  background: color-mix(in srgb, var(--cs-primary) 6%, #eef0f2);
  overflow: hidden;
}

@media (min-width: 960px) {
  .cs-featured__media {
    aspect-ratio: auto;
    min-height: 100%;
  }
}

.cs-featured__media img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.cs-featured__shell:hover .cs-featured__media img {
  transform: scale(1.03);
}

.cs-featured__aside {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.cs-featured__body-link {
  display: block;
  flex: 1;
  color: inherit;
  text-decoration: none;
}

.cs-featured__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 32px 28px 24px;
}

@media (min-width: 960px) {
  .cs-featured__body {
    padding: 40px 40px 28px;
  }
}

.cs-featured__title {
  margin: 0 0 16px;
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--cs-text);
  transition: color 0.2s ease;
}

.cs-featured__shell:hover .cs-featured__title {
  color: var(--cs-primary);
}

.cs-featured__desc {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cs-text-soft);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cs-featured__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 28px 24px;
}

@media (min-width: 960px) {
  .cs-featured__controls {
    padding: 0 40px 32px;
  }
}

.cs-featured__nav {
  display: flex;
  gap: 8px;
}

.cs-featured__nav button {
  width: 40px;
  height: 40px;
  border: 1px solid color-mix(in srgb, var(--cs-primary) 28%, transparent);
  background: color-mix(in srgb, var(--cs-primary) 6%, #fff);
  color: var(--cs-primary);
  cursor: pointer;
  border-radius: 6px;
  font-size: 18px;
  line-height: 1;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.cs-featured__nav button:hover {
  background: var(--cs-primary);
  border-color: var(--cs-primary);
  color: #fff;
}

.cs-featured__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.cs-featured__tags span {
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--cs-primary) 18%, var(--cs-border));
  background: color-mix(in srgb, var(--cs-primary) 6%, #fff);
  color: var(--cs-text-soft);
}

.cs-featured__dots {
  display: flex;
  gap: 6px;
}

.cs-featured__dot {
  width: 20px;
  height: 4px;
  padding: 0;
  border: none;
  border-radius: 2px;
  background: color-mix(in srgb, var(--cs-primary) 22%, transparent);
  cursor: pointer;
  transition: background 0.2s ease, width 0.2s ease;
}

.cs-featured__dot.is-active {
  width: 28px;
  background: var(--cs-primary);
}

/* 筛选 + 列表 */
.cs-list-wrap {
  background: var(--cs-surface);
  padding: 36px 0 80px;
}

.cs-list-inner {
  width: var(--cs-shell);
  margin: 0 auto;
}

.cs-filters {
  position: sticky;
  top: 64px;
  z-index: 20;
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 0 24px;
  margin: 0 0 8px;
  background: var(--cs-surface);
  scrollbar-width: none;
}

.cs-filters::-webkit-scrollbar {
  display: none;
}

.cs-filters a {
  flex-shrink: 0;
  padding: 8px 16px;
  font-size: 14px;
  border-radius: 4px;
  text-decoration: none;
  color: var(--cs-text-soft);
  background: var(--cs-white);
  border: 1px solid transparent;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.cs-filters a:hover:not(.is-active) {
  color: var(--cs-primary, #00378b);
}

.cs-filters a.is-active,
.cs-filters a.is-active:hover,
.cs-filters a.is-active:focus-visible {
  background: var(--cs-primary, #00378b);
  color: var(--cs-white);
  border-color: var(--cs-primary, #00378b);
  font-weight: 500;
}

.cs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px 32px;
}

@media (min-width: 768px) {
  .cs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .cs-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.cs-card {
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--cs-white);
  border-radius: 14px;
  border: 1px solid var(--cs-border);
  box-shadow: 0 6px 24px rgba(16, 24, 40, 0.05);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.cs-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cs-primary) 0%, #00a8e8 100%);
  opacity: 0;
  transition: opacity 0.25s ease;
  z-index: 1;
}

.cs-card:hover {
  border-color: color-mix(in srgb, var(--cs-primary) 28%, transparent);
  box-shadow: 0 12px 32px rgba(0, 146, 216, 0.12);
  transform: translateY(-3px);
}

.cs-card:hover::before {
  opacity: 1;
}

.cs-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  background: color-mix(in srgb, var(--cs-primary) 5%, #eef0f2);
  overflow: hidden;
}

.cs-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 45%,
    color-mix(in srgb, var(--cs-primary) 42%, transparent) 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.cs-card:hover .cs-card__media::after {
  opacity: 1;
}

.cs-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.cs-card:hover .cs-card__media img {
  transform: scale(1.04);
}

.cs-card__body {
  padding: 24px 28px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.cs-card__body h3 {
  margin: 0 0 12px;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--cs-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}

.cs-card:hover .cs-card__body h3 {
  color: var(--cs-primary);
}

.cs-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--cs-text-muted);
  margin-bottom: 12px;
}

.cs-card__meta .cs-divider {
  width: 1px;
  height: 14px;
  background: color-mix(in srgb, var(--cs-primary) 35%, var(--cs-text-muted));
}

.cs-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.cs-card__tags span {
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--cs-primary) 18%, var(--cs-border));
  background: color-mix(in srgb, var(--cs-primary) 6%, #fff);
  color: var(--cs-text-soft);
}

/* 徽章 / 元信息 */
.cs-badge {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  width: fit-content;
  max-width: 100%;
  gap: 8px;
  margin-bottom: 12px;
  padding: 5px 12px 5px 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--cs-primary);
  border-radius: 999px;
  background: color-mix(in srgb, var(--cs-primary) 10%, #fff);
  border: 1px solid color-mix(in srgb, var(--cs-primary) 20%, transparent);
}

.cs-badge--card {
  margin-bottom: 10px;
}

.cs-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cs-primary);
  box-shadow: 0 0 0 3px var(--cs-primary-soft);
}

.cs-meta {
  display: flex;
  align-items: center;
  align-self: flex-start;
  width: fit-content;
  max-width: 100%;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--cs-text-muted);
  background: color-mix(in srgb, var(--cs-primary) 6%, transparent);
}

.cs-meta .cs-divider {
  width: 1px;
  height: 14px;
  background: color-mix(in srgb, var(--cs-primary) 35%, var(--cs-text-muted));
}

/* 查看详情 */
.cs-readmore {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  width: fit-content;
  max-width: 100%;
  gap: 10px;
  margin-top: auto;
  padding: 8px 14px 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cs-primary);
  background: color-mix(in srgb, var(--cs-primary) 9%, #fff);
  border: 1px solid color-mix(in srgb, var(--cs-primary) 24%, transparent);
  transition:
    color 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    gap 0.2s ease;
}

.cs-readmore__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--cs-primary) 14%, #fff);
  transition: background 0.2s ease, transform 0.2s ease;
}

.cs-readmore-icon {
  width: 10px;
  height: 10px;
}

.cs-readmore-featured {
  padding: 10px 18px 10px 20px;
  font-size: 15px;
}

.cs-readmore-featured .cs-readmore__icon {
  width: 26px;
  height: 26px;
}

.cs-card:hover .cs-readmore,
.cs-featured__shell:hover .cs-readmore {
  color: #fff;
  background: var(--cs-primary);
  border-color: var(--cs-primary);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--cs-primary) 30%, transparent);
  gap: 12px;
}

.cs-card:hover .cs-readmore__icon,
.cs-featured__shell:hover .cs-readmore__icon {
  background: rgba(255, 255, 255, 0.22);
  transform: translate(2px, -2px);
}

.cs-pagination {
  margin-top: 56px;
  display: flex;
  justify-content: center;
}

.cs-pagination-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cs-pagination-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 14px;
  border-radius: 8px;
  font-size: 14px;
  text-decoration: none;
  color: var(--cs-text-soft);
  border: 1px solid var(--cs-border);
  background: var(--cs-white);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

a.cs-pagination-item:hover {
  border-color: var(--cs-primary);
  color: var(--cs-primary);
  background: color-mix(in srgb, var(--cs-primary) 10%, #fff);
}

.cs-pagination-item--nav {
  font-weight: 600;
  color: var(--cs-primary);
  border-color: color-mix(in srgb, var(--cs-primary) 28%, var(--cs-border));
  background: color-mix(in srgb, var(--cs-primary) 6%, #fff);
}

a.cs-pagination-item--nav:hover {
  color: #fff;
  background: var(--cs-primary);
  border-color: var(--cs-primary);
}

.cs-pagination-item.is-active {
  background: var(--cs-primary);
  border-color: var(--cs-primary);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 6px 16px color-mix(in srgb, var(--cs-primary) 24%, transparent);
}

.cs-pagination-item.is-disabled,
.cs-pagination-item.is-ellipsis {
  border-color: transparent;
  background: transparent;
  color: var(--cs-text-muted);
  cursor: default;
}

.cs-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 24px;
  border-radius: 16px;
  border: 1px dashed color-mix(in srgb, var(--cs-primary) 28%, transparent);
  background: color-mix(in srgb, var(--cs-primary) 4%, #fff);
  color: var(--cs-text-muted);
  font-size: 16px;
}

/* 详情页 */
.cs-detail {
  width: var(--cs-shell);
  margin: 0 auto;
  padding: 40px 0 72px;
  background: var(--cs-primary);
}

.cs-detail__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 8px 14px;
  border-radius: 6px;
  color: var(--cs-primary);
  background: color-mix(in srgb, var(--cs-primary) 8%, #fff);
  border: 1px solid color-mix(in srgb, var(--cs-primary) 22%, transparent);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.cs-detail__back:hover {
  color: #fff;
  background: var(--cs-primary);
  border-color: var(--cs-primary);
}

.cs-detail__cover {
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 32px;
  aspect-ratio: 16 / 9;
  background: color-mix(in srgb, var(--cs-primary) 5%, #eef0f2);
  border: 1px solid color-mix(in srgb, var(--cs-primary) 12%, var(--cs-border));
  box-shadow: 0 10px 36px rgba(0, 146, 216, 0.08);
}

.cs-detail__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cs-detail h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 32px;
  color: var(--cs-text);
}

.cs-detail h1::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  margin-top: 18px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cs-primary) 0%, #00a8e8 100%);
}

.cs-detail__meta {
  margin-bottom: 20px;
}

.cs-detail__content {
  font-size: 16px;
  line-height: 1.85;
  color: var(--cs-text-soft);
}

.cs-detail__content :first-child {
  margin-top: 0;
}

.cs-detail__content a {
  color: var(--cs-primary);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--cs-primary) 35%, transparent);
  text-underline-offset: 3px;
}

.cs-detail__content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.cs-detail__content h2::before,
.cs-detail__content h3::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 0.9em;
  margin-right: 10px;
  border-radius: 2px;
  vertical-align: -0.08em;
  background: var(--cs-primary-dark);
}

.cs-detail-related {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid color-mix(in srgb, var(--cs-primary) 14%, var(--cs-border));
}

.cs-detail-related__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 32px;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--cs-text);
}

.cs-detail-related__title::before {
  content: "";
  flex-shrink: 0;
  width: 4px;
  height: 24px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cs-primary) 0%, var(--cs-primary-dark) 100%);
}

/* 响应式见 public/css/site-responsive.css */