/* 上海对外经贸大学专业介绍网站 - 公共样式 */

:root {
    --tesla-red: #E31937;
}

body {
    background: #000000;
    color: #ffffff;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* 核心颜色类 */
.tesla-red {
    color: #E31937 !important;
}

.bg-tesla-red {
    background-color: #E31937 !important;
}

.border-tesla-red {
    border-color: #E31937 !important;
}

.bg-tesla-red-dark {
    background-color: rgba(227, 25, 55, 0.2) !important;
}

/* 字体层次 */
.title-huge {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
}

.subtitle-large {
    font-size: 1.5rem;
    font-weight: 600;
}

.number-big {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1;
}

.text-small-en {
    font-size: 0.75rem;
    opacity: 0.8;
    font-family: 'Arial', sans-serif;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.text-medium-en {
    font-size: 0.875rem;
    opacity: 0.9;
    font-family: 'Arial', sans-serif;
    letter-spacing: 0.3px;
}

.text-description {
    font-size: 0.875rem;
    line-height: 1.6;
    color: #d1d5db;
}

.text-caption {
    font-size: 0.75rem;
    line-height: 1.5;
    color: #9ca3af;
}

/* 布局网格 */
.grid-bento {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
}

.span-6 { grid-column: span 6; }
.span-4 { grid-column: span 4; }
.span-3 { grid-column: span 3; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* 卡片效果 */
.card-hover {
    transition: all 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(227, 25, 55, 0.3);
}

/* 装饰线条 */
.line-graphic {
    position: relative;
}

.line-graphic::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #E31937, transparent);
}

/* 计数器样式 */
.counter {
    font-family: 'Courier New', monospace;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .span-6, .span-4, .span-3, .span-8 { 
        grid-column: span 12; 
    }
    
    .title-huge { 
        font-size: 2.5rem; 
        line-height: 1.2;
    }
    
    .number-big { 
        font-size: 3rem; 
        line-height: 1;
    }
    
    .text-description {
        font-size: 0.8rem;
        line-height: 1.5;
    }
    
    .text-small-en {
        font-size: 0.7rem;
    }
    
    .grid-bento {
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .title-huge { 
        font-size: 2rem; 
    }
    
    .number-big { 
        font-size: 2.5rem; 
    }
    
    .text-description {
        font-size: 0.75rem;
    }
}

/* 专业卡片样式 */
.major-card {
    background: #1f2937;
    border: 1px solid #374151;
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.major-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(227, 25, 55, 0.3);
    border-color: #E31937;
}

.major-card .major-icon {
    font-size: 2.5rem;
    color: #E31937;
    margin-bottom: 1rem;
}

.major-card .major-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.major-card .major-subtitle {
    font-size: 0.875rem;
    color: #9ca3af;
    margin-bottom: 1rem;
}

.major-card .major-description {
    font-size: 0.875rem;
    line-height: 1.6;
    color: #d1d5db;
}

/* 学院标识 */
.college-badge {
    display: inline-block;
    background: rgba(227, 25, 55, 0.2);
    color: #E31937;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* 导航链接 */
.nav-link {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #E31937;
}

/* 按钮样式 */
.btn-primary {
    background-color: #E31937;
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #c41230;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(227, 25, 55, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #E31937;
    border: 2px solid #E31937;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: #E31937;
    color: #ffffff;
    transform: translateY(-2px);
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #1f2937;
}

::-webkit-scrollbar-thumb {
    background: #E31937;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #c41230;
}