/**
 * index.css - 首页专属样式
 * 林草生态技术系网站
 */

/* =========================================
   1. 顶部条扩展样式 - 已移除
   ========================================= */
/* .top-bar 相关样式已根据用户要求移除 */

/* =========================================
   2. Banner轮播区
   ========================================= */
.banner-section {
    position: relative;
    width: 100%;
    height: 420px;
    max-height: 500px;
    overflow: hidden;
    background-color: var(--color-bg-section);
}

.banner-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.banner-slide.active {
    opacity: 1;
    visibility: visible;
}

/* Banner图片链接区域 - 铺满整个slide */
.banner-slide a {
    display: block;
    width: 100%;
    height: 100%;
}

/* Banner图片 - 铺满且不变形 */
.banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Banner文字内容 - 绝对定位覆盖在图片上 */
.banner-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
    color: var(--color-white);
    padding: 40px 20px 25px;
    text-align: center;
    z-index: 2;
}

.banner-content h2 {
    font-size: clamp(20px, 1.5vw + 10px, 32px);
    font-weight: bold;
    margin: 0;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: 1px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.banner-content p {
    font-size: clamp(14px, 1vw + 6px, 18px);
    opacity: 0.95;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.4);
    margin-top: 8px;
}

/* 轮播箭头按钮 */
.banner-prev,
.banner-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.3);
    border: none;
    border-radius: 50%;
    color: var(--color-white);
    font-size: clamp(20px, 1.3vw + 6px, 28px);
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.banner-prev {
    left: 30px;
}

.banner-next {
    right: 30px;
}

.banner-prev:hover,
.banner-next:hover {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--color-primary);
}

/* 轮播指示点 */
.banner-dots {
    position: absolute;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.banner-dot {
    width: 12px;
    height: 12px;
    padding: 0;
    border: none;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.banner-dot:hover,
.banner-dot.active {
    background-color: var(--color-white);
    transform: scale(1.2);
}

/* =========================================
   3. 新闻+通知双栏区
   ========================================= */
.news-notice-section {
    background-color: var(--color-white);
    padding: 50px 0;
}

.news-notice-wrapper {
    display: flex;
    gap: 30px;
}

/* 新闻栏 */
.news-block {
    flex: 0 0 60%;
    max-width: 60%;
}

.news-block .section-title {
    display: flex;
    align-items: center;
    padding-bottom: 15px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--color-border);
}

.news-block .section-title h2 {
    font-size: var(--font-size-title);
    font-weight: bold;
    color: var(--color-text);
    position: relative;
    padding-left: 12px;
}

.news-block .section-title h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background-color: var(--color-primary);
}

/* Tab切换 */
.tab-nav {
    display: flex;
    margin-left: 30px;
    gap: 5px;
}

.tab-item {
    padding: 5px 15px;
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    background-color: transparent;
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

.tab-item:hover,
.tab-item.active {
    color: var(--color-primary);
}

.tab-item.active::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 2px;
    background-color: var(--color-primary);
}

/* Tab内容区域切换 */
.tab-content {
    display: none !important;
}

.tab-content.active {
    display: flex !important;
    flex-direction: column;
}

.more-link {
    margin-left: auto;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: var(--transition);
}

.more-link:hover {
    color: var(--color-primary);
}

/* 新闻列表 */
.news-list {
    display: flex;
    flex-direction: column;
}

.news-item {
    display: flex;
    gap: 18px;
    padding: 18px 0;
    border-bottom: 1px dashed var(--color-border);
    transition: var(--transition);
}

.news-item:hover {
    background-color: var(--color-bg-alt);
    margin: 0 -10px;
    padding: 18px 10px;
    border-radius: var(--radius);
}

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

.news-thumb {
    flex-shrink: 0;
    width: 130px;
    height: 85px;
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
}

/* 为缩略图添加半透明图案覆盖 */
.news-thumb::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpath d='M30 0L60 30L30 60L0 30z' fill='%23ffffff' fill-opacity='0.08'/%3E%3C/svg%3E") repeat;
    background-size: 30px 30px;
    pointer-events: none;
}

.news-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.news-info h3 {
    font-size: var(--font-size-lg);
    font-weight: normal;
    line-height: 1.4;
    margin-bottom: 5px;
}

.news-info h3 a {
    color: var(--color-text);
    transition: var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-info h3 a:hover {
    color: var(--color-primary);
}

.news-summary {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* 通知栏 */
.notice-block {
    flex: 0 0 calc(40% - 30px);
    max-width: calc(40% - 30px);
}

.notice-block .section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 15px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--color-border);
}

.notice-block .section-title h2 {
    font-size: var(--font-size-title);
    font-weight: bold;
    color: var(--color-text);
    position: relative;
    padding-left: 12px;
}

.notice-block .section-title h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background-color: var(--color-accent);
}

/* 通知列表 */
.notice-list {
    display: flex;
    flex-direction: column;
}

.notice-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 0;
    border-bottom: 1px dashed var(--color-border);
    transition: var(--transition);
}

.notice-item:hover {
    background-color: var(--color-bg-alt);
    margin: 0 -8px;
    padding: 12px 8px;
    border-radius: var(--radius);
}

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

.notice-date {
    flex-shrink: 0;
    width: 70px;
    min-width: 70px;
    background-color: var(--color-primary);
    color: var(--color-white);
    text-align: center;
    padding: 8px 5px;
    border-radius: var(--radius);
    white-space: nowrap;
}

.notice-date .day {
    display: block;
    font-size: clamp(20px, 1.2vw + 6px, 26px);
    font-weight: bold;
    line-height: 1.2;
}

.notice-date .month {
    display: block;
    font-size: 11px;
    opacity: 0.9;
    white-space: nowrap;
}

.notice-title {
    flex: 1;
    font-size: var(--font-size-base);
    color: var(--color-text);
    line-height: 1.5;
    transition: var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.notice-title:hover {
    color: var(--color-primary);
}

/* =========================================
   4. 学科专业展示区
   ========================================= */
.majors-section {
    background-color: var(--color-bg-alt);
    padding: 50px 0;
}

.section-title-center {
    justify-content: center;
    border-bottom: none;
    margin-bottom: 30px;
}

.section-title-center h2 {
    font-size: clamp(22px, 1.5vw + 8px, 32px);
    font-weight: bold;
    color: var(--color-text);
    position: relative;
    padding-bottom: 15px;
}

.section-title-center h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-primary);
}

.majors-wrapper {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.major-card {
    flex: 1;
    background-color: var(--color-white);
    padding: 30px 20px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
}

.major-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-primary-light);
}

.major-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 15px rgba(74, 124, 89, 0.3);
    overflow: hidden;
    background: linear-gradient(135deg, #4A7C59 0%, #2D5F3D 100%);
}

.major-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.major-icon span {
    font-size: clamp(32px, 2.2vw + 10px, 48px);
    color: #fff;
}

.major-card h3 {
    font-size: var(--font-size-xl);
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: 12px;
}

.major-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

/* =========================================
   5. 党建思政区块
   ========================================= */
.party-section {
    background-color: var(--color-white);
    padding: 50px 0;
}

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

.party-item {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 15px;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    border: 1px solid #e8f0e8;
    transition: box-shadow 0.3s ease;
}

.party-item:hover {
    box-shadow: 0 4px 12px rgba(74, 124, 89, 0.15);
}

.party-thumb {
    flex-shrink: 0;
    width: 120px;
    height: 80px;
    overflow: hidden;
    border-radius: 6px;
}

.party-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.party-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.party-info h4 {
    font-size: 15px;
    line-height: 1.5;
    margin-bottom: 8px;
}

.party-info h4 a {
    color: #333;
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.party-info h4 a:hover {
    color: var(--color-primary, #4A7C59);
}

.party-date {
    font-size: 13px;
    color: #999;
}

/* =========================================
   6. 教学师资
   ========================================= */
.quick-links-section {
    background-color: var(--color-bg-alt);
    padding: 50px 0;
}

.quick-links-wrapper {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.quick-link-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 25px 15px;
    background-color: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-decoration: none;
}

.quick-link-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.quick-link-item:hover .quick-icon {
    transform: scale(1.1);
}

.quick-icon {
    font-size: 36px;
    margin-bottom: 12px;
    transition: var(--transition);
}

.quick-link-item span {
    font-size: var(--font-size-base);
    color: var(--color-text);
    font-weight: 500;
}

/* =========================================
   7. 教师队伍区块
   ========================================= */
.teachers-section {
    background-color: var(--color-white);
    padding: 50px 0;
}

.teachers-wrapper {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.teacher-card {
    background-color: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.teacher-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.teacher-card a {
    display: block;
    text-decoration: none;
}

.teacher-img {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
}

.teacher-card h3 {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
    padding: 15px;
    text-align: center;
    transition: var(--transition);
}

.teacher-card:hover h3 {
    color: var(--color-primary);
}

/* =========================================
   8. 学生活动区块
   ========================================= */
.student-activities-section {
    background-color: var(--color-bg-alt);
    padding: 50px 0;
}

.activities-wrapper {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.activity-card {
    background-color: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.activity-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.activity-card a {
    display: block;
    text-decoration: none;
}

.activity-img {
    width: 100%;
    height: 180px;
    background-size: cover;
    background-position: center;
}

.activity-card h3 {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
    padding: 15px;
    text-align: center;
    transition: var(--transition);
}

.activity-card:hover h3 {
    color: var(--color-primary);
}

/* =========================================
   9. 页脚扩展样式
   ========================================= */
.footer {
    margin-top: 0;
}

.footer-links {
    display: flex;
    align-items: center;
    padding: 18px 0;
}

.footer-links .container {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
}

.footer-links-title {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.95);
    font-weight: 500;
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.75);
    transition: var(--transition);
    padding: 2px 0;
    border-bottom: 1px solid transparent;
}

.footer-links a:hover {
    color: var(--color-white);
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.footer-main {
    padding: 30px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-info {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 35px;
}

.footer-info p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.85);
    display: flex;
    align-items: center;
}

.footer-info p::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    background-color: var(--color-primary-light);
    border-radius: 50%;
    margin-right: 8px;
}