/* 
  文件名称：css/layout.css
  功能描述：页面骨架与结构化布局 - 包含双栏响应式容器、通用卡片容器、Banner 轮播容器、垂直新闻列表与导航宫格
  布局技术：Grid 布局 (campus-layout)、Flex 布局 (news-item)
*/

/* LAYOUT */
.campus-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 28px 24px;
    flex: 1;
}

.campus-layout {
    display: grid;
    grid-template-columns: 1fr 310px;
    gap: 24px;
    align-items: start;
}

/* CARD */
.campus-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    overflow: hidden;
    margin-bottom: 20px;
}

.campus-card-header {
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    color: white;
    padding: 11px 20px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.campus-card-header::before {
    content: '';
    width: 4px;
    height: 18px;
    background: var(--accent);
    border-radius: 2px;
    display: inline-block;
}

.campus-card-body {
    padding: 20px;
}

/* BANNER */
.campus-banner {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    width: 100%;
    aspect-ratio: 16/5;
    min-height: 240px;
    background: var(--primary-dark);
    margin-bottom: 24px;
}

.campus-banner-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.campus-banner-slide.active {
    opacity: 1;
}

.campus-banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.campus-banner-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: white;
    padding: 20px 24px 14px;
    font-size: 16px;
    font-weight: 600;
}

.campus-banner-dots {
    position: absolute;
    bottom: 12px;
    right: 16px;
    display: flex;
    gap: 6px;
}

.campus-banner-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
}

.campus-banner-dot.active {
    background: var(--accent);
    transform: scale(1.3);
}

/* NEWS */
.news-list {
    list-style: none;
}

.news-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 13px 0;
    border-bottom: 1px solid var(--border);
}

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

.news-date {
    flex-shrink: 0;
    background: var(--primary);
    color: white;
    text-align: center;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    min-width: 48px;
    line-height: 1.3;
}

.news-date .day {
    font-size: 18px;
    font-weight: 700;
    display: block;
}

.news-title {
    font-size: 14px;
    color: var(--text);
    font-weight: 500;
    line-height: 1.6;
}

.news-tag {
    display: inline-block;
    font-size: 11px;
    padding: 1px 6px;
    border-radius: 3px;
    margin-right: 4px;
    font-weight: 600;
}

.news-tag.notice {
    background: #fff3cd;
    color: #856404;
}

.news-tag.important {
    background: #f8d7da;
    color: #721c24;
}

.news-tag.info {
    background: #d1ecf1;
    color: #0c5460;
}

/* QUICK LINKS */
.quick-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.quick-link-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
    background: var(--card-bg);
}

.quick-link-item:hover {
    border-color: var(--primary);
    background: #f0f5fc;
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.quick-link-icon {
    font-size: 24px;
    line-height: 1;
}

/* NOTICE */
.notice-list {
    list-style: none;
}

.notice-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 9px 0;
    border-bottom: 1px dashed var(--border);
    font-size: 13px;
}

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

.notice-item::before {
    content: '▶';
    color: var(--accent);
    font-size: 10px;
    margin-top: 4px;
    flex-shrink: 0;
}