/* 案例频道与详情页仅使用项目既有色板。 */
.cases-page .site-header { background: var(--white); box-shadow: 0 2px 14px color-mix(in srgb, var(--deep-blue) 8%, transparent); }
.cases-page .site-header .brand img { filter: brightness(0) saturate(100%) invert(30%) sepia(89%) saturate(2212%) hue-rotate(211deg) brightness(91%) contrast(96%); }
.cases-page .site-header .nav-link { color: var(--deep-blue); }
.cases-page .site-header .nav-link:hover, .cases-page .site-header .nav-link.active { color: var(--light-blue); }
.cases-page .site-header .navbar .main-nav .nav-link::after { background: var(--light-blue); }
.cases-page .site-header .consult-link { border-color: var(--light-blue); color: var(--white); background: var(--light-blue); }
.cases-page .site-header .search-icon { color: var(--deep-blue); }
.cases-page main { padding-top: 78px; }
.cases-intro { padding: 72px 0 56px; background: var(--surface); }
.cases-intro .page-breadcrumb, .case-article .page-breadcrumb { color: var(--gray); }
.cases-intro .page-breadcrumb a:hover, .case-article .page-breadcrumb a:hover { color: var(--light-blue); }
.cases-eyebrow { display: flex; align-items: center; gap: 12px; margin: 0 0 14px; color: var(--gray); font-size: 14px; letter-spacing: .06em; }
.cases-eyebrow::before { width: 34px; height: 3px; content: ""; background: var(--light-blue); }
.cases-intro h1, .case-article h1 { margin: 0; color: var(--deep-blue); font-size: clamp(30px, 3.2vw, 48px); font-weight: 700; line-height: 1.3; }
.cases-lead { max-width: 700px; margin: 24px 0 0; color: var(--gray); font-size: 16px; line-height: 1.8; }
.cases-status { display: inline-block; margin-top: 24px; padding: 7px 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--gray); background: var(--white); font-size: 13px; }
.case-category-nav { position: sticky; top: 78px; z-index: 5; border-bottom: 1px solid var(--line); background: var(--white); }
.case-category-nav .site-container { display: flex; gap: 8px; overflow-x: auto; padding-top: 12px; padding-bottom: 12px; scrollbar-width: none; }
.case-category-nav .site-container::-webkit-scrollbar { display: none; }
.case-category-nav a { flex: none; padding: 10px 16px; border-radius: 99px; color: var(--gray); font-size: 14px; }
.case-category-nav a:hover, .case-category-nav a:focus-visible { color: var(--light-blue); background: var(--surface); }
.case-category-nav a[aria-current="location"] { color: var(--white); background: var(--light-blue); }
.case-group { padding: 64px 0; scroll-margin-top: 152px; }
.case-group:nth-of-type(even) { background: var(--surface); }
.case-group-heading { display: flex; align-items: baseline; gap: 16px; margin-bottom: 32px; }
.case-group-number { color: var(--light-blue); font-size: 14px; }
.case-group h2 { margin: 0; color: var(--deep-blue); font-size: 24px; font-weight: 700; }
.case-feature { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr); overflow: hidden; min-height: 340px; border-radius: 12px; background: var(--white); box-shadow: 0 12px 30px color-mix(in srgb, var(--deep-blue) 8%, transparent); }
.case-feature-image { width: 100%; height: 100%; min-height: 340px; object-fit: cover; }
.case-feature-copy { display: flex; align-items: flex-start; justify-content: center; flex-direction: column; padding: clamp(24px, 4vw, 56px); }
.case-feature-copy .case-label, .case-article .case-label { margin: 0 0 16px; color: var(--light-blue); font-size: 14px; font-weight: 600; }
.case-feature-copy h3 { margin: 0 0 20px; color: var(--black); font-size: 24px; font-weight: 700; line-height: 1.45; }
.case-feature-copy p:not(.case-label) { margin: 0; color: var(--gray); font-size: 16px; line-height: 1.8; }
.case-view, .case-back { display: inline-flex; align-items: center; gap: 10px; margin-top: 32px; color: var(--light-blue); font-size: 14px; font-weight: 700; letter-spacing: .1em; }
.case-view:hover, .case-back:hover { color: var(--deep-blue); }
.case-article { padding: 64px 0 80px; }
.case-article-top { max-width: 850px; }
.case-article .page-breadcrumb { flex-wrap: wrap; }
.case-article h1 { font-size: clamp(28px, 3vw, 40px); }
.case-article-intro { max-width: 800px; margin: 24px 0 0; color: var(--gray); font-size: 18px; line-height: 1.8; }
.case-article-image { display: block; width: 100%; max-height: 520px; aspect-ratio: 16 / 9; margin-top: 48px; border-radius: 12px; object-fit: cover; }
.case-image-note { margin: 10px 0 0; color: var(--gray); font-size: 13px; }
.case-article-body { display: grid; grid-template-columns: minmax(0, 2fr) minmax(220px, 1fr); gap: 64px; margin-top: 56px; }
.case-article-body h2 { margin: 0 0 20px; color: var(--deep-blue); font-size: 24px; }
.case-article-body p { color: var(--gray); font-size: 16px; line-height: 1.9; }
.case-article-body aside { align-self: start; padding: 24px; border-left: 3px solid var(--light-blue); background: var(--surface); }
.case-article-body aside h2 { font-size: 18px; }
.case-article-body aside p { margin: 0; font-size: 14px; }
.case-article-body aside a { display: inline-block; margin-top: 20px; color: var(--light-blue); font-size: 14px; }
@media (hover: hover) and (pointer: fine) {
  .case-feature { transition: transform .2s ease, box-shadow .2s ease; }
  .case-feature:hover { transform: translateY(-3px); box-shadow: 0 16px 34px color-mix(in srgb, var(--deep-blue) 14%, transparent); }
}
@media (max-width: 991.98px) {
  .cases-page .site-header .menu-toggle { border-color: var(--line); }
  .cases-page .site-header .menu-toggle .navbar-toggler-icon { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%23102369' stroke-linecap='round' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E"); }
  .cases-page .site-header .navbar-collapse { border-top-color: var(--line); }
  .cases-page .site-header:has(.navbar-collapse.show) { background: var(--white); }
  .cases-page main { padding-top: 70px; }
  .case-category-nav { top: 70px; }
  .case-feature { grid-template-columns: 1fr 1fr; }
  .case-article-body { gap: 32px; }
}
@media (max-width: 575.98px) {
  .cases-intro { padding: 40px 0; }
  .cases-lead { margin-top: 16px; font-size: 14px; }
  .case-category-nav .site-container { gap: 4px; }
  .case-category-nav a { padding: 8px 12px; }
  .case-group { padding: 40px 0; scroll-margin-top: 126px; }
  .case-group-heading { margin-bottom: 24px; }
  .case-group h2 { font-size: 20px; }
  .case-feature { grid-template-columns: 1fr; }
  .case-feature-image { min-height: 0; aspect-ratio: 16 / 10; }
  .case-feature-copy { padding: 24px; }
  .case-feature-copy h3 { margin-bottom: 12px; font-size: 20px; }
  .case-feature-copy p:not(.case-label) { font-size: 14px; }
  .case-view { margin-top: 24px; }
  .case-article { padding: 40px 0 56px; }
  .case-article-intro { margin-top: 16px; font-size: 14px; }
  .case-article-image { margin-top: 32px; aspect-ratio: 16 / 10; }
  .case-article-body { grid-template-columns: 1fr; gap: 24px; margin-top: 40px; }
  .case-article-body h2 { font-size: 20px; }
  .case-article-body p { font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) { .case-feature { transition: none; } }