/*
 * 文章分类页面样式
 * 独立命名空间：vc-category-
 */

/* ==================== CSS变量 ==================== */
:root {
    --vc-primary: #FF6A00;
    --vc-primary-dark: #E65C00;
    --vc-accent: #FFB800;
    --vc-text-dark: #1A1A1A;
    --vc-text-light: #666666;
    --vc-white: #FFFFFF;
    --vc-bg-light: #F8F9FA;
    --vc-border: #E0E0E0;
}

/* ==================== 页面头部 ==================== */
.vc-category-hero {
    background: linear-gradient(135deg, #1A1A1A 0%, #2C2C2C 100%);
    padding: 60px 0 80px;
    position: relative;
    overflow: hidden;
}

.vc-category-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 106, 0, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: vc-float 20s ease-in-out infinite;
}

.vc-category-hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 184, 0, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: vc-float 15s ease-in-out infinite reverse;
}

@keyframes vc-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.vc-category-hero-container {
    max-width: 1350px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.vc-category-title {
    font-size: 48px;
    font-weight: 700;
    color: #FFFFFF;
    margin: 0 0 15px 0;
    line-height: 1.2;
}

.vc-category-description {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    max-width: 700px;
    margin: 0 0 25px 0;
    line-height: 1.6;
}

.vc-category-description p {
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
}

.vc-category-meta {
    display: flex;
    gap: 20px;
    align-items: center;
}

.vc-category-count {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 106, 0, 0.15);
    border: 1px solid rgba(255, 106, 0, 0.3);
    border-radius: 20px;
    color: var(--vc-accent);
    font-size: 14px;
    font-weight: 600;
}

.vc-category-count svg {
    flex-shrink: 0;
}

/* ==================== 主容器 ==================== */
.vc-category-container {
    max-width: 1350px;
    margin: 40px auto 80px;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    position: relative;
    z-index: 2;
}

/* ==================== 文章列表 ==================== */
.vc-category-content {
    min-width: 0;
}

.vc-category-posts {
    display: grid;
    gap: 30px;
}

/* ==================== 文章卡片 ==================== */
.vc-category-card {
    background: var(--vc-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 0;
}

.vc-category-card:hover {
    box-shadow: 0 12px 40px rgba(255, 106, 0, 0.15);
    transform: translateY(-4px);
}

.vc-category-card.no-thumbnail {
    grid-template-columns: 1fr;
}

.vc-category-card-image {
    position: relative;
    overflow: hidden;
    height: 100%;
    min-height: 280px;
}

.vc-category-card-image a {
    display: block;
    height: 100%;
    position: relative;
}

.vc-category-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.vc-category-card:hover .vc-category-card-image img {
    transform: scale(1.08);
}

.vc-category-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
    opacity: 0;
    transition: opacity 0.4s;
}

.vc-category-card:hover .vc-category-card-overlay {
    opacity: 1;
}

.vc-category-card-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 14px;
    background: linear-gradient(135deg, var(--vc-primary) 0%, var(--vc-primary-dark) 100%);
    color: var(--vc-white);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(255, 106, 0, 0.3);
    z-index: 2;
}

.vc-category-card-badge-inline {
    display: inline-block;
    padding: 6px 12px;
    background: var(--vc-bg-light);
    color: var(--vc-primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 6px;
    margin-bottom: 16px;
    border: 1px solid var(--vc-border);
    width: auto;
    max-width: fit-content;
}

.vc-category-card-body {
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.vc-category-card.no-thumbnail .vc-category-card-body {
    padding: 40px;
    background: linear-gradient(135deg, #FFFFFF 0%, #F8F9FA 100%);
}

.vc-category-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
}

.vc-category-card-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--vc-text-light);
}

.vc-category-card-meta svg {
    flex-shrink: 0;
    color: var(--vc-primary);
}

.vc-category-card-title {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.4;
    margin: 0 0 16px 0;
}

.vc-category-card-title a {
    color: var(--vc-text-dark);
    text-decoration: none;
    transition: color 0.3s;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.vc-category-card-title a:hover {
    color: var(--vc-primary);
}

.vc-category-card.no-thumbnail .vc-category-card-title {
    font-size: 28px;
    margin-bottom: 20px;
}

.vc-category-card.no-thumbnail .vc-category-card-title a {
    -webkit-line-clamp: 3;
}

.vc-category-card-excerpt {
    font-size: 15px;
    line-height: 1.7;
    color: var(--vc-text-light);
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.vc-category-card.no-thumbnail .vc-category-card-excerpt {
    font-size: 16px;
    line-height: 1.8;
    -webkit-line-clamp: 4;
    margin-bottom: 24px;
}

.vc-category-card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--vc-primary);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    margin-top: auto;
}

.vc-category-card-link:hover {
    gap: 12px;
    color: var(--vc-primary-dark);
}

.vc-category-card-link svg {
    transition: transform 0.3s;
}

.vc-category-card-link:hover svg {
    transform: translateX(4px);
}

/* ==================== 分页 ==================== */
.vc-category-pagination {
    margin-top: 50px;
    display: flex;
    justify-content: center;
}

.vc-load-more-container {
    text-align: center;
    width: 100%;
}

.vc-load-more-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    background: var(--vc-white);
    color: var(--vc-text-dark);
    font-size: 15px;
    font-weight: 600;
    border: 2px solid var(--vc-border);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.vc-load-more-btn:hover {
    background: var(--vc-primary);
    color: var(--vc-white);
    border-color: var(--vc-primary);
    box-shadow: 0 4px 12px rgba(255, 106, 0, 0.3);
    transform: translateY(-2px);
}

.vc-load-more-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.vc-load-more-btn.loading .vc-load-more-text {
    display: none;
}

.vc-load-more-spinner {
    display: none;
    animation: spin 1s linear infinite;
}

.vc-load-more-btn.loading .vc-load-more-spinner {
    display: block;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.vc-load-more-end {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    color: var(--vc-text-light);
    font-size: 15px;
}

.vc-load-more-end svg {
    color: #28A745;
}

/* ==================== 空状态 ==================== */
.vc-category-empty {
    text-align: center;
    padding: 80px 20px;
    background: var(--vc-white);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.vc-category-empty svg {
    color: var(--vc-text-light);
    opacity: 0.3;
    margin-bottom: 24px;
}

.vc-category-empty h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--vc-text-dark);
    margin: 0 0 12px 0;
}

.vc-category-empty p {
    font-size: 16px;
    color: var(--vc-text-light);
    margin: 0 0 30px 0;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .vc-category-container {
        grid-template-columns: 1fr 350px;
        gap: 30px;
    }
    
    .vc-category-form-wrapper.fixed {
        width: 350px;
    }
    
    .vc-category-card {
        grid-template-columns: 280px 1fr;
    }
}

@media (max-width: 992px) {
    .vc-category-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .vc-category-sidebar {
        order: 1;
    }
    
    .vc-category-card {
        grid-template-columns: 240px 1fr;
    }
    
    .vc-category-card.no-thumbnail {
        grid-template-columns: 1fr;
    }
    
    .vc-category-card-body {
        padding: 24px;
    }
    
    .vc-category-card.no-thumbnail .vc-category-card-body {
        padding: 32px;
    }
}

@media (max-width: 768px) {
    .vc-category-hero {
        padding: 40px 0 60px;
    }
    
    .vc-category-title {
        font-size: 36px;
    }
    
    .vc-category-description {
        font-size: 16px;
    }
    
    .vc-category-container {
        margin-top: 40px;
    }
    
    .vc-category-card {
        grid-template-columns: 1fr;
    }
    
    .vc-category-card.no-thumbnail {
        grid-template-columns: 1fr;
    }
    
    .vc-category-card-image {
        min-height: 220px;
    }
    
    .vc-category-card-title {
        font-size: 20px;
    }
    
    .vc-category-card.no-thumbnail .vc-category-card-title {
        font-size: 24px;
    }
    
    .vc-category-card.no-thumbnail .vc-category-card-body {
        padding: 28px;
    }
}

@media (max-width: 480px) {
    .vc-category-title {
        font-size: 28px;
    }
    
    .vc-category-card-body {
        padding: 20px;
    }
    
    .vc-category-card.no-thumbnail .vc-category-card-body {
        padding: 24px;
    }
    
    .vc-category-card-title {
        font-size: 18px;
    }
    
    .vc-category-card.no-thumbnail .vc-category-card-title {
        font-size: 22px;
    }
    
    .vc-category-card-excerpt {
        font-size: 14px;
    }
    
    .vc-category-card.no-thumbnail .vc-category-card-excerpt {
        font-size: 15px;
    }
}