:root {
    --primary-color: #3EA240;
    --secondary-color: #2c7a2d;
    --accent-color: #5ec060;
    --text-color: #333;
    --light-text: #666;
    --background-color: #f5f7fa;
    --card-background: #ffffff;
    --border-color: #e5e7eb;
    --hover-color: #f0f5ff;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

/* 状态栏 */
.status-bar {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 0;
    font-size: 14px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.status-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.time-display {
    font-weight: 500;
}

.status-buttons {
    display: flex;
    gap: 15px;
    align-items: center;
}

.login-btn-container {
    position: relative;
}

.login-btn {
    background-color: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    padding: 5px 15px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
    white-space: nowrap;
}

.login-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.help-btn {
    background-color: transparent;
    border: 1px solid white;
    color: white;
    padding: 5px 15px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
    white-space: nowrap;
}

.help-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 登录菜单 */
.login-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 5px;
    background-color: white;
    box-shadow: var(--shadow);
    border-radius: var(--border-radius-sm);
    padding: 10px 0;
    display: none;
    z-index: 1000;
    min-width: 150px;
}

.login-menu.show {
    display: block;
}

.login-menu a {
    display: block;
    padding: 8px 20px;
    color: var(--text-color);
    text-decoration: none;
    transition: background-color 0.2s;
}

.login-menu a:hover {
    background-color: var(--hover-color);
}

/* Banner区域 */
.banner-section {
    background-color: white;
    padding: 0;
    box-shadow: var(--shadow);
}

.banner-content {
    display: block;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.logo-text small {
    font-size: 16px;
    font-weight: normal;
    color: var(--light-text);
    margin-left: 5px;
}

.banner-slideshow {
    width: 100%;
    position: relative;
    overflow: hidden;
}

.slideshow-container {
    display: flex;
    transition: transform 0.5s ease;
}

.slide {
    min-width: 100%;
    position: relative;
    overflow: hidden;
    font-size: 0px;
}

.slide img {
    width: 100%;
}

.pagination {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 8px;
    z-index: 10;
}

.pagination-btn {
    width: 30px;
    height: 30px;
    border: 2px solid white;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s;
}

.pagination-btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.pagination-btn.active {
    background-color: white;
    color: var(--primary-color);
    border-color: white;
}

.slide-btn {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background-color: rgba(255, 255, 255, 0.9);
    color: #666;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.3s;
    text-decoration: none;
}

.slide-btn:hover {
    background-color: white;
}

/* 主体内容 */
.main-content {
    margin-top: 20px;
    display: grid;
    grid-template-columns: 250px 1fr 250px;
    gap: 20px;
}

/* 左侧栏目 */
.left-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.section {
    background-color: white;
    border-radius: var(--border-radius-md);
    padding: 20px;
    box-shadow: var(--shadow);
}

.section-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-color);
}

.cover-image {
    width: 100%;
    height: 180px;
    background-color: var(--background-color);
    border-radius: var(--border-radius-sm);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
}
.cover-image > img {
    max-width: 100%;
    max-height: 100%;
}
.cover-info {
    font-size: 14px;
    line-height: 1.8;
}

.announcement-list {
    list-style: none;
}

.announcement-list li {
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.announcement-list li:last-child {
    border-bottom: none;
}

.announcement-list a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.announcement-list a:hover {
    color: var(--primary-color);
}

.friend-links {
    list-style: none;
}

.friend-links li {
    margin-bottom: 8px;
}

.friend-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.friend-links a:hover {
    color: var(--primary-color);
}

.qrcode {
    width: 120px;
    height: 120px;
    background-color: var(--background-color);
    margin: 0 auto 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    font-size: 12px;
}

.qrcode > img {
    max-width: 100%;
    max-height: 100%;
}
/* 中间栏目 */
.middle-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.issue-title {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-color);
}

.article-category {
    margin-bottom: 20px;
}

.category-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 10px;
    padding-left: 10px;
    border-left: 4px solid var(--accent-color);
}

.article-list {
    list-style: none;
    margin-left: 20px;
}

.article-list li {
    margin-bottom: 8px;
    font-size: 14px;
}

.article-list li:before {
    content: "·";
    color: var(--primary-color);
    font-weight: bold;
    margin-right: 8px;
}

/* 右侧栏目 */
.right-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.search-box {
    margin-bottom: 15px;
}

.search-box label {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
    color: var(--light-text);
}

.search-box input {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
}

.search-box button {
    width: 100%;
    margin-top: 10px;
    padding: 8px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.search-box button:hover {
    background-color: var(--secondary-color);
}

.date-range {
    display: flex;
    gap: 10px;
    margin-top: 5px;
}

.date-range input {
    flex: 1;
}

/* 期刊检索样式 */
.journal-search {
    background-color: white;
    border-radius: var(--border-radius-md);
    padding: 20px;
    box-shadow: var(--shadow);
}

.journal-search-form {
    display: flex;
    gap: 10px;
    align-items: center;
}

.journal-search-form input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
}

.journal-search-form button {
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.journal-search-form button:hover {
    background-color: var(--secondary-color);
}

/* 综合检索查询工具样式 */
.search-tool {
    margin-bottom: 20px;
    background-color: white;
    border-radius: var(--border-radius-md);
    padding: 20px;
    box-shadow: var(--shadow);
}

.search-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-row {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.form-group {
    flex: 1;
    min-width: 150px;
}

.form-group.full-width {
    flex: 100%;
}

.form-group label {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
    color: var(--light-text);
}

.form-group select,
.form-group input {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
}

.btn-submit {
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.btn-submit:hover {
    background-color: var(--secondary-color);
}

/* 公告模块样式 */
.announcement {
    background-color: white;
    border-radius: var(--border-radius-md);
    padding: 20px;
    box-shadow: var(--shadow);
}

.announcement-main {
    background-color: #f6fff0;
    border-radius: var(--border-radius-sm);
    padding: 15px;
    margin-bottom: 15px;
}

.announcement-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.announcement-title a {
    font-size: 16px;
    font-weight: 500;
    color: var(--primary-color);
    text-decoration: none;
    flex: 1;
}

.announcement-date {
    font-size: 12px;
    color: var(--light-text);
    margin-left: 10px;
}

.announcement-content {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-color);
}

.announcement-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.announcement-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.announcement-item a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    flex: 1;
}

.announcement-item a:hover {
    color: var(--primary-color);
}

/* 中间栏目调整 */
.middle-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 响应式搜索工具 */
@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
    }
    
    .form-group {
        width: 100%;
    }
}

/* 底部栏目 */
.footer {
    margin-top: 40px;
    background-color: var(--primary-color);
    color: white;
    padding: 30px 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.visitor-count {
    margin-bottom: 20px;
    font-size: 16px;
}

.footer-info {
    font-size: 14px;
    line-height: 1.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .banner-section {
        padding: 0px;
    }

    .banner-section > .container {
        padding: 0px;
    }

    .banner-slideshow {
        border-radius: unset;
    }
    
    .banner-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .banner-slideshow {
        margin-left: 0;
        width: 100%;
    }
    
    .status-content {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    .status-buttons {
        width: 100%;
        justify-content: space-between;
    }
    
    .login-menu {
        right: 20px;
    }
    
    /* 移动端状态栏样式 */
    .status-content {
        flex-direction: column;
        align-items: center;
        gap: 5px;
    }
    
    .status-content > div:first-child {
        display: flex;
        align-items: center;
        gap: 0;
        justify-content: center;
    }
    
    .site-title {
        display: block;
        text-align: center;
    }
    
    .home-btn,
    .time-display,
    .status-buttons {
        display: none;
    }
    
    /* 移动端导航 */
    .nav-menu ul {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .nav-menu li {
        flex: 0 0 50%;
        margin: 0;
        padding: 0;
    }
    
    .nav-menu a {
        width: 100%;
        text-align: center;
        border-right: 1px solid rgba(255, 255, 255, 0.1);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu li:nth-child(even) a {
        border-right: none;
    }
    
    .nav-menu li:last-child a,
    .nav-menu li:nth-last-child(2) a {
        border-bottom: none;
    }
}

/* 导航菜单 */
.nav-menu {
    background: linear-gradient(180deg, rgb(62 162 64), rgb(94 192 96));
    padding: 0;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.nav-menu ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
}

.nav-menu li {
    flex: 1;
    text-align: center;
}

.nav-menu a {
    display: block;
    padding: 15px 10px;
    color: white;
    text-decoration: none;
    font-size: 16px;
    transition: background-color 0.3s;
    width: 100%;
}

.nav-menu a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Banner标题 */
.slide-title {
    position: absolute;
    top: 10px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 5px 15px;
    border-radius: 3px;
    font-size: 14px;
    z-index: 10;
    white-space: nowrap;
}

.slide-title:empty {
    display: none;
}

/* 用户登录按钮 */
.user-login-box {
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.user-login-box > a {
    background: linear-gradient(0deg, rgb(62 162 64), rgb(94 192 96)) !important;
}

.btn-register {
    text-align: center;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 5px;
    background-color: #3498db;
    color: white;
    white-space: nowrap;
    display: block;
    transition: opacity 0.3s;
}

.btn-register:hover {
    opacity: 0.9;
}

.btn-author {
    text-align: center;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 5px;
    background-color: #27ae60;
    color: white;
    white-space: nowrap;
    display: block;
    transition: opacity 0.3s;
}

.btn-author:hover {
    opacity: 0.9;
}

.btn-editor {
    text-align: center;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 5px;
    background-color: #e67e22;
    color: white;
    white-space: nowrap;
    display: block;
    transition: opacity 0.3s;
}

.btn-editor:hover {
    opacity: 0.9;
}

.btn-admin {
    text-align: center;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 5px;
    background-color: #9b59b6;
    color: white;
    white-space: nowrap;
    display: block;
    transition: opacity 0.3s;
}

.btn-admin:hover {
    opacity: 0.9;
}

/* 过刊浏览页样式 */
.issue-browser {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

.page-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

.no-data {
    text-align: center;
    padding: 60px 20px;
    color: var(--light-text);
    font-size: 16px;
}

.year-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.year-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background-color: var(--card-background);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow);
    transition: box-shadow 0.3s ease;
}

.year-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.year-label {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 80px;
    flex-shrink: 0;
}

.issue-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    flex: 1;
}

.issue-link {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--hover-color);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.issue-link:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(62, 162, 64, 0.3);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .year-item {
        flex-direction: column;
        gap: 15px;
    }
    
    .year-label {
        min-width: auto;
        padding: 0;
    }
    
    .issue-list {
        gap: 10px;
    }
    
    .issue-link {
        padding: 6px 12px;
        font-size: 13px;
    }
}