/* === price.css - ChatGPT Plus价格对比页面专用样式 === */

/* 确保导航栏price页面处于激活状态 */
.nav-link[href="price.html"] {
    color: var(--primary-light) !important;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(99, 102, 241, 0.15));
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.25);
    border: 1px solid rgba(14, 165, 233, 0.3);
}
/* === 面包屑导航样式（简洁直线版） === */
.breadcrumb-nav {
    margin-bottom: 25px;
    padding-top: 15px;
}
.breadcrumb {
    display: flex;
    align-items: center;
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.9rem;
    font-weight: 400;
}
.breadcrumb-item {
    display: flex;
    align-items: center;
}
.breadcrumb-item a {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
}
.breadcrumb-item a:hover {
    color: var(--primary-light);
    background: rgba(14, 165, 233, 0.08);
    transform: translateY(-1px);
}
.breadcrumb-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    transition: all 0.3s ease;
}
.breadcrumb-item a:hover .breadcrumb-icon {
    transform: scale(1.1);
    color: var(--primary);
}
.breadcrumb-separator {
    margin: 0 12px;
    color: var(--text-secondary);
    opacity: 0.6;
    display: flex;
    align-items: center;
    font-size: 0.8rem;
}
.breadcrumb-separator svg {
    width: 12px;
    height: 12px;
}
.breadcrumb-item.current {
    color: var(--primary-light);
    font-weight: 600;
}
.breadcrumb-item.current span {
    color: var(--primary-light);
    position: relative;
}
/* 当前页面下划线效果 */
.breadcrumb-item.current span::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 1px;
    animation: underlineExpand 0.5s ease-out;
}
@keyframes underlineExpand {
    from {
        width: 0;
        opacity: 0;
    }
    to {
        width: 100%;
        opacity: 1;
    }
}
/* 面包屑入场动画 */
@keyframes breadcrumbSlideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}
.breadcrumb-nav {
    animation: breadcrumbSlideIn 0.4s ease-out;
}
.breadcrumb-item {
    animation: breadcrumbSlideIn 0.5s ease-out;
}
.breadcrumb-item:nth-child(1) { animation-delay: 0.1s; }
.breadcrumb-item:nth-child(2) { animation-delay: 0.2s; }
.breadcrumb-item:nth-child(3) { animation-delay: 0.3s; }
/* === 面包屑响应式设计 === */
@media (max-width: 768px) {
    .breadcrumb-nav {
        margin-bottom: 20px;
        padding-top: 12px;
    }
    
    .breadcrumb {
        font-size: 0.85rem;
        flex-wrap: wrap;
        gap: 4px;
    }
    
    .breadcrumb-item a {
        padding: 3px 6px;
        gap: 4px;
    }
    
    .breadcrumb-icon {
        width: 14px;
        height: 14px;
    }
    
    .breadcrumb-separator {
        margin: 0 8px;
    }
    
    .breadcrumb-separator svg {
        width: 10px;
        height: 10px;
    }
}
@media (max-width: 480px) {
    .breadcrumb-nav {
        margin-bottom: 15px;
        padding-top: 10px;
    }
    
    .breadcrumb {
        font-size: 0.8rem;
    }
    
    .breadcrumb-item a {
        padding: 2px 4px;
        gap: 3px;
        border-radius: 4px;
    }
    
    .breadcrumb-icon {
        width: 12px;
        height: 12px;
    }
    
    .breadcrumb-separator {
        margin: 0 6px;
    }
    
    .breadcrumb-separator svg {
        width: 8px;
        height: 8px;
    }
}
/* === 微交互效果 === */
.breadcrumb-item a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.1), transparent);
    transition: left 0.6s ease;
    border-radius: 6px;
}
.breadcrumb-item a:hover::before {
    left: 100%;
}
/* === 高对比度模式适配 === */
@media (prefers-contrast: high) {
    .breadcrumb-item a {
        border: 1px solid transparent;
    }
    
    .breadcrumb-item a:hover {
        border-color: var(--primary);
        background: transparent;
    }
    
    .breadcrumb-item.current span::after {
        height: 3px;
        background: var(--primary);
    }
}
/* === 价格对比表格样式 === */
.price-comparison-section {
    margin: 80px 0;
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-top: 40px;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    min-width: 600px;
}

.comparison-table th,
.comparison-table td {
    padding: 20px 25px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.comparison-table th {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(99, 102, 241, 0.1));
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.comparison-table td:first-child {
    background: rgba(255, 255, 255, 0.02);
    font-weight: 500;
    color: var(--text-primary);
    border-right: 1px solid var(--border);
    width: 25%;
}

.column-header {
    text-align: center;
    position: relative;
}

.column-title {
    font-size: 1.2rem;
    font-weight: 700;
    display: block;
    margin-bottom: 4px;
}

.column-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.official-column {
    background: linear-gradient(135deg, rgba(107, 114, 128, 0.08), rgba(75, 85, 99, 0.08));
    width: 35%;
}

.our-column {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(99, 102, 241, 0.12));
    position: relative;
    width: 40%;
}

.recommended-badge {
    position: absolute;
    top: -8px;
    right: 15px;
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.positive-cell {
    color: var(--success);
    font-weight: 600;
    position: relative;
}

.positive-cell::before {
    content: '✓';
    color: var(--success);
    font-weight: bold;
    margin-right: 8px;
}

.negative-cell {
    color: #ef4444;
    font-weight: 500;
    opacity: 0.8;
    position: relative;
}

.negative-cell::before {
    content: '✗';
    color: #ef4444;
    font-weight: bold;
    margin-right: 8px;
}

/* === 价格优势网格样式 === */
.price-advantages {
    margin: 80px 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.advantage-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--success));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-card:hover {
    transform: translateY(-5px);
    border-color: rgba(14, 165, 233, 0.3);
    box-shadow: 0 15px 40px rgba(14, 165, 233, 0.15);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--success));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
    transition: all 0.3s ease;
}

.advantage-card:hover .advantage-icon {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(14, 165, 233, 0.4);
}

.advantage-icon svg {
    width: 30px;
    height: 30px;
    color: white;
}

.advantage-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.advantage-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* === 成本分析样式 === */
.cost-analysis {
    margin: 80px 0;
    padding: 50px 40px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(5, 150, 105, 0.05));
    border-radius: 20px;
    border: 1px solid rgba(16, 185, 129, 0.1);
}

.analysis-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    align-items: start;
    margin-top: 30px;
}

.analysis-text h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.analysis-text ul {
    list-style: none;
    padding: 0;
}

.analysis-text li {
    color: var(--text-secondary);
    padding: 10px 0;
    font-size: 0.95rem;
    line-height: 1.6;
    position: relative;
    padding-left: 25px;
}

.analysis-text li::before {
    content: '💰';
    position: absolute;
    left: 0;
    top: 10px;
}

.cost-breakdown {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cost-breakdown h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-align: center;
}

.cost-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}

.cost-item:last-child {
    border-bottom: none;
}

.cost-item.total {
    margin-top: 10px;
    padding-top: 15px;
    border-top: 2px solid var(--primary);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

/* === 用户推荐样式 === */
.user-recommendation {
    margin: 80px 0;
}

.recommendation-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.recommendation-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.recommendation-card.featured {
    border: 2px solid var(--primary);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.08), rgba(99, 102, 241, 0.08));
    transform: scale(1.02);
}

.recommendation-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(14, 165, 233, 0.15);
}

.recommendation-card.featured:hover {
    transform: scale(1.02) translateY(-5px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.popularity-badge {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.card-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.benefit-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.benefit-item {
    color: var(--success);
    font-size: 0.9rem;
    font-weight: 500;
    padding-left: 5px;
}

/* === 响应式适配 === */
@media (max-width: 992px) {
    .analysis-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
    }
    
    .recommendation-cards {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .price-comparison-section,
    .price-advantages,
    .cost-analysis,
    .user-recommendation {
        margin: 60px 0;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 15px 12px;
        font-size: 0.9rem;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .advantage-card {
        padding: 25px;
    }
    
    .cost-analysis {
        padding: 30px 25px;
    }
    
    .cost-breakdown {
        padding: 20px;
    }
    
    .recommendation-cards {
        grid-template-columns: 1fr;
    }
    
    .recommendation-card {
        padding: 25px;
    }
    
    .recommendation-card.featured {
        transform: none;
    }
    
    .recommendation-card.featured:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 480px) {
    .comparison-table {
        min-width: 500px;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 12px 8px;
        font-size: 0.85rem;
    }
    
    .column-title {
        font-size: 1.1rem;
    }
    
    .column-subtitle {
        font-size: 0.8rem;
    }
    
    .recommended-badge {
        font-size: 0.7rem;
        padding: 2px 8px;
        right: 10px;
    }
    
    .advantage-card {
        padding: 20px;
    }
    
    .advantage-card h3 {
        font-size: 1.2rem;
    }
    
    .cost-analysis {
        padding: 25px 20px;
    }
    
    .cost-breakdown {
        padding: 15px;
    }
    
    .recommendation-card {
        padding: 20px;
    }
    
    .card-header {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    .card-header h3 {
        font-size: 1.2rem;
    }
}