/* ============================================
   二级页面样式 - 产品与包装
   ============================================ */

/* 二级页面基础样式 */
body.subpage {
    background-color: var(--color-bg);
    color: var(--color-text);
}

/* 二级页面头部 */
.subpage-header {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
    position: relative;
    overflow: hidden;
}

.subpage-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0, 255, 136, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 30px;
    transition: color var(--transition-normal);
}

.back-link:hover {
    color: var(--color-accent);
}

.back-arrow {
    transition: transform var(--transition-normal);
}

.back-link:hover .back-arrow {
    transform: translateX(-4px);
}

.subpage-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subpage-subtitle {
    font-size: 1.2rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.subpage-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    line-height: 1.8;
}

/* 筛选区域 */
.filter-section {
    padding: 40px 0;
    border-bottom: 1px solid var(--color-border);
}

.filter-tabs {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 10px 24px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 30px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.filter-tab:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.filter-tab.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}

/* 案例展示区 */
.cases-section {
    padding: 80px 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--color-bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.case-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.case-image-wrapper {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.case-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.case-card:hover .case-image {
    transform: scale(1.05);
}

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.case-card:hover .case-overlay {
    opacity: 1;
}

.case-view {
    padding: 12px 28px;
    background: var(--color-accent);
    color: var(--color-bg);
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.case-card:hover .case-view {
    transform: translateY(0);
}

.case-info {
    padding: 24px;
}

.case-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 255, 136, 0.1);
    color: var(--color-accent);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.case-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.case-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.case-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 10px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* 合作客户 */
.clients-section {
    padding: 80px 0;
    background: var(--color-bg-secondary);
}

.clients-section .section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--color-text);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 20px;
}

.client-item {
    padding: 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
}

.client-item:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

/* CTA区域 */
.cta-section {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.cta-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
}

.cta-desc {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 40px;
    background: var(--color-accent);
    color: var(--color-bg);
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.cta-btn:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-arrow {
    transition: transform var(--transition-normal);
}

.cta-btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* 响应式适配 */
@media (max-width: 768px) {
    .subpage-header {
        padding: 120px 0 60px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-tabs {
        justify-content: flex-start;
    }
    
    .filter-tab {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 隐藏案例（筛选用） */
.case-card.hidden {
    display: none;
}

/* 页脚 */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--color-text);
}

.footer-copyright {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

/* ============================================
   三级页面样式 - 项目详情
   ============================================ */

/* 项目头部增强 */
.project-header {
    padding: 160px 0 60px;
}

.project-client {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(0, 255, 136, 0.1);
    color: var(--color-accent);
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.project-meta {
    display: flex;
    gap: 40px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.meta-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.meta-value {
    font-size: 1rem;
    color: var(--color-text);
    font-weight: 500;
}

/* 项目主图 */
.project-hero {
    padding: 0 0 60px;
}

.project-hero-image {
    border-radius: 16px;
    overflow: hidden;
}

.project-hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 项目介绍 */
.project-intro {
    padding: 80px 0;
    background: var(--color-bg-secondary);
}

.intro-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

.intro-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--color-text);
}

.intro-text {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.intro-services {
    background: var(--color-bg-card);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.services-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}

.services-list {
    list-style: none;
}

.services-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.services-list li:last-child {
    border-bottom: none;
}

.services-list li::before {
    content: '◆';
    color: var(--color-accent);
    margin-right: 10px;
}

/* 设计展示画廊 */
.project-gallery {
    padding: 100px 0;
}

.gallery-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 40px;
    color: var(--color-text);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
}

.gallery-item.large {
    grid-column: span 2;
}

.gallery-item.wide {
    grid-column: span 2;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--color-text);
    font-size: 0.9rem;
    font-weight: 500;
}

/* 品牌视觉 */
.project-branding {
    padding: 100px 0;
    background: var(--color-bg-secondary);
}

.project-branding .section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 60px;
}

.branding-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.branding-image {
    border-radius: 16px;
    overflow: hidden;
}

.branding-image img {
    width: 100%;
    height: auto;
    display: block;
}

.branding-info h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--color-text);
}

.branding-info p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

.branding-features {
    list-style: none;
}

.branding-features li {
    padding: 15px 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.branding-features li strong {
    color: var(--color-accent);
    display: block;
    margin-bottom: 5px;
}

/* 设计亮点 */
.project-highlights {
    padding: 100px 0;
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.highlight-card {
    background: var(--color-bg-card);
    padding: 40px 30px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all var(--transition-normal);
}

.highlight-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.highlight-icon {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: 20px;
    display: block;
}

.highlight-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--color-text);
}

.highlight-card p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* 相关项目 */
.related-projects {
    padding: 100px 0;
    background: var(--color-bg-secondary);
}

.related-projects .section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.related-card {
    background: var(--color-bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
}

.related-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.related-image {
    aspect-ratio: 4/3;
    overflow: hidden;
}

.related-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.related-card:hover .related-image img {
    transform: scale(1.05);
}

.related-category {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(0, 255, 136, 0.1);
    color: var(--color-accent);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    margin: 15px 15px 8px;
}

.related-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 15px 15px;
}

/* 案例卡片链接 */
.case-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.case-card-link:hover {
    color: inherit;
}

/* 响应式适配 */
@media (max-width: 992px) {
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .branding-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .highlights-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .project-meta {
        flex-direction: column;
        gap: 20px;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-item.large,
    .gallery-item.wide {
        grid-column: span 1;
    }
    
    .highlights-grid {
        grid-template-columns: 1fr;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
}