/*
 * @kanway-css-index
 * 文件: css/case/case-studies.css
 * 层级: 案例
 * 引用页面: case-studies.html
 * 依赖: case-showcase.css
 * 修改指引: .case-studies-* 案例总览
 * 索引: css/00-样式文件索引.css
 */
/* Case Showcase — Kanway */
:root {
    --case-blue: #1d5198;
    --case-blue-light: #3a7bd5;
    --case-text: #1a1a1a;
    --case-muted: #6c757d;
    --case-border: #e1e5ea;
    --case-bg: #f8f9fa;
    --case-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    --case-radius: 10px;
}

.case-main {
    padding: 48px 0 72px;
    background: #fff;
}

.case-main .container {
    max-width: 1450px;
    margin: 0 auto;
}

.case-intro {
    text-align: center;
    max-width: 820px;
    margin: 0 auto 40px;
    padding: 0 16px;
}

.case-intro h2 {
    font-size: clamp(26px, 4vw, 34px);
    font-weight: 700;
    color: var(--case-blue);
    margin-bottom: 14px;
    line-height: 1.25;
}

.case-intro p {
    font-size: 17px;
    color: var(--case-muted);
    line-height: 1.75;
    margin: 0;
}

.case-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 48px;
}

.case-stat {
    text-align: center;
    padding: 22px 14px;
    background: var(--case-bg);
    border-radius: var(--case-radius);
    border: 1px solid var(--case-border);
}

.case-stat strong {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: var(--case-blue);
    line-height: 1.15;
}

.case-stat span {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    color: var(--case-muted);
    line-height: 1.4;
}

.case-section-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--case-text);
    margin-bottom: 20px;
    border-left: 4px solid var(--case-blue);
    padding-left: 12px;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
    margin-bottom: 40px;
}

.case-card {
    border-radius: var(--case-radius);
    overflow: hidden;
    border: 1px solid var(--case-border);
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--case-shadow);
}

.case-card a {
    display: block;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

.case-card-visual {
    position: relative;
    overflow: hidden;
    height: 168px;
    background-size: cover;
}

.case-card-visual--hotel {
    background: linear-gradient(135deg, #1d5198, #5a9fd4);
}

.case-card-visual--building {
    background: linear-gradient(135deg, #0f3460, #1d5198);
}

.case-card-visual--house {
    background: linear-gradient(135deg, #e67e22, #f39c12);
}

.case-card-visual--public {
    background: linear-gradient(135deg, #2c3e50, #4a6278);
}

.case-card-visual--system {
    background: linear-gradient(135deg, #1abc9c, #16a085);
}

.case-card-visual--project {
    background: linear-gradient(135deg, #8e44ad, #9b59b6);
}

.case-card-visual img {
    position: absolute;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.38s ease;
}

.case-card:hover .case-card-visual img {
    transform: scale(1.06);
}

.case-card-visual::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.45) 0%, transparent 45%);
    pointer-events: none;
}

/* Gallery & featured video */
.case-media-section-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--case-text);
    margin: 0 0 8px;
    padding-left: 12px;
    border-left: 4px solid var(--case-blue);
}

.case-video-section {
    margin: 52px auto 56px;
    max-width: 980px;
    padding: 0 14px;
}

.case-video-section .case-video-caption {
    font-size: 15px;
    color: var(--case-muted);
    margin: 0 0 16px;
    line-height: 1.55;
}

.case-video-shell {
    position: relative;
    border-radius: var(--case-radius);
    overflow: hidden;
    border: 1px solid var(--case-border);
    background: #0a1628;
    box-shadow: var(--case-shadow);
}

.case-showreel-video {
    display: block;
    width: 100%;
    max-height: min(68vh, 560px);
    margin: 0 auto;
}

.case-showreel-play {
    display: block;
    width: 100%;
    padding: 0;
    border: none;
    background: #0a1628;
    cursor: pointer;
    position: relative;
}

.case-showreel-play img {
    width: 100%;
    max-height: min(68vh, 560px);
    object-fit: cover;
    display: block;
    opacity: 0.85;
}

.case-showreel-play__icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 72px;
    color: #fff;
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}

.case-gallery-intro {
    font-size: 15px;
    color: var(--case-muted);
    margin: -4px 0 20px;
    max-width: 720px;
    line-height: 1.6;
}

.case-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 12px;
}

.case-gallery-item {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: var(--case-radius);
    border: 1px solid var(--case-border);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

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

.case-gallery-item:hover img {
    transform: scale(1.04);
}

.case-gallery-caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 12px 14px;
    margin: 0;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.72));
}

.case-gallery-item a {
    display: block;
    height: 100%;
    text-decoration: none;
    color: inherit;
}

.case-gallery-footnote {
    font-size: 13px;
    color: var(--case-muted);
    margin: 0 0 40px;
}

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

@media (max-width: 480px) {
    .case-gallery {
        grid-template-columns: 1fr;
    }
}

.case-card-body {
    padding: 22px 22px 20px;
}

.case-card-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--case-text);
    margin: 0 0 10px;
    line-height: 1.3;
}

.case-card-body p {
    font-size: 14px;
    color: var(--case-muted);
    line-height: 1.65;
    margin: 0 0 16px;
}

.case-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--case-blue);
}

.case-card-link i {
    font-size: 18px;
    transition: transform 0.2s ease;
}

.case-card:hover .case-card-link i {
    transform: translateX(4px);
}

.case-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 48px 0;
}

.case-highlight {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 26px 24px;
    background: linear-gradient(135deg, #f0f4fa 0%, #fff 100%);
    border: 1px solid var(--case-border);
    border-radius: var(--case-radius);
}

.case-highlight-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 10px;
    background: var(--case-blue);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
}

.case-highlight h3 {
    margin: 0 0 8px;
    font-size: 17px;
    font-weight: 700;
    color: var(--case-text);
}

.case-highlight p {
    margin: 0 0 12px;
    font-size: 14px;
    color: var(--case-muted);
    line-height: 1.6;
}

.case-highlight a {
    font-size: 14px;
    font-weight: 600;
    color: var(--case-blue);
    text-decoration: none;
}

.case-highlight a:hover {
    text-decoration: underline;
}

.case-cta {
    text-align: center;
    padding: 44px 24px;
    background: var(--case-bg);
    border-radius: var(--case-radius);
    border: 1px solid var(--case-border);
}

.case-cta h3 {
    margin: 0 0 10px;
    font-size: 24px;
    color: var(--case-text);
}

.case-cta p {
    margin: 0 0 22px;
    font-size: 16px;
    color: var(--case-muted);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.case-cta-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
}

.case-cta-btns a {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.case-cta-primary {
    background: var(--case-blue);
    color: #fff;
    border: 2px solid var(--case-blue);
}

.case-cta-primary:hover {
    background: #164a87;
    border-color: #164a87;
    color: #fff;
}

.case-cta-outline {
    background: #fff;
    color: var(--case-blue);
    border: 2px solid var(--case-blue);
}

.case-cta-outline:hover {
    background: #eef3f9;
}

@media (max-width: 1024px) {
    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .case-grid {
        grid-template-columns: 1fr;
    }

    .case-stats {
        grid-template-columns: 1fr 1fr;
    }

    .case-highlights {
        grid-template-columns: 1fr;
    }
}