:root {
    --primary: #1a56db;
    --secondary: #2d3748;
    --light: #f7fafc;
    --border-radius: 12px;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf9 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 顶部标题栏 */
.header {
    background: white;
    box-shadow: 0 4 12px rgba(0, 0, 0, 0.08);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: left 0.4s ease, width 0.4s ease;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1); /* 添加过渡效果 */
    justify-content: space-between; /* 确保标题和按钮有适当间距 */
}

/* 包裹容器 */
.header-wrapper {
    position: relative;
    z-index: 101; /* 确保在侧边栏上方 */
}

.header-actions {
    display: flex;
    align-items: center;
    margin-left: auto; /* 使按钮在右侧 */
    padding-right: 15px;
}

#registerButton {
    padding: 8px 16px;
    background: linear-gradient(45deg, #10b981, #059669);
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    box-shadow: 0 4px 8px rgba(16, 185, 129, 0.25);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

#registerButton:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(16, 185, 129, 0.35);
}

/* 校徽样式 */
.school-logo {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    margin-right: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    background: white;
    overflow: hidden;
}

.school-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 5px;
}

.title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--secondary);
    letter-spacing: 1px;
}

/* 侧边导航栏 */
.sidebar {
    width: 280px;
    background: white;
    height: 100vh;
    position: fixed;
    top: 0;
    left: -300px;
    z-index: 100;
    box-shadow: 5px 0 25px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    padding: 6rem 0 2rem;
    overflow-y: auto; /* 允许侧边栏滚动 */
}

.sidebar.active {
    left: 0;
    z-index: 1000; /* 提高z-index确保位于标题栏上方 */
}

/* 侧边栏展开时标题栏的位置 */
.sidebar.active ~ .main-content.expanded .header {
    left: 280px;
    width: calc(100% - 280px);
}

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

.nav-links li {
    padding: 0;
    margin: 5px 1rem;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.nav-links a {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    text-decoration: none;
    color: var(--secondary);
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: var(--border-radius);
}

.nav-links a:hover {
    background: #f1f5fe;
    transform: translateX(5px);
}

.nav-links a.active {
    background: linear-gradient(45deg, var(--primary), #3a7bfd);
    color: white;
    box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
}

.nav-links i {
    margin-right: 12px;
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

/* 右下角浮动按钮 */
.floating-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 101;
    background: var(--primary);
    color: white;
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: button;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 15px rgba(26, 86, 219, 0.35);
    transition: var(--transition);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(26, 86, 219, 0.5); }
    70% { box-shadow: 0 0 0 15px rgba(26, 86, 219, 0); }
    100% { box-shadow: 0 0 0 0 rgba(26, 86, 219, 0); }
}

.floating-toggle:hover {
    transform: scale(1.1) rotate(180deg);
    box-shadow: 0 8px 20px rgba(26, 86, 219, 0.45);
}

/* 主内容区 */
.main-content {
    padding: 2rem;
    margin-left: 0;
    transition: var(--transition);
}

.main-content.expanded {
    margin-left: 280px;
}

.section {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
    padding: 2.5rem;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.5s forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section h2 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.8rem;
    border-bottom: 2px solid #eef2f7;
    font-weight: 600;
    font-size: 1.8rem;
}

.section p {
    line-height: 1.8;
    color: #4a5568;
    margin-bottom: 1.2rem;
}

/* 套餐区域样式 */
.plans-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.plan-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    min-height: 500px;
    flex-direction: column;
    height: 100%; /* 确保卡片高度一致 */
}

.plan-content {
    flex: 1; /* 让内容区域填充剩余空间 */
}

.plan-action {
    position: absolute;
    bottom: 2rem; /* 距离底部固定距离 */
    left: 2rem; /* 保持与左右内边距一致 */
    right: 2rem;
}

.plan-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.plan-card.basic {
    border-top: 4px solid #3b82f6;
}

.plan-card.premium {
    border-top: 4px solid #8b5cf6;
}

.plan-card.data {
    border-top: 4px solid #10b981;
}

.plan-card.vip {
    border-top: 4px solid #f59e0b;
}

.plan-card.family {
    border-top: 4px solid #ec4899;
}

.plan-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.plan-icon {
    width: 50px;
    height: 50px;
    background: #eff6ff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
}

.plan-icon i {
    font-size: 1.5rem;
    color: #3b82f6;
}

.plan-icon-premium i {
    color: #8b5cf6;
}

.plan-icon-data i {
    color: #10b981;
}

.plan-icon-vip i {
    color: #f59e0b;
}

.plan-icon-family i {
    color: #ec4899;
}

.plan-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary);
}

.plan-price {
    font-size: 2.2rem;
    font-weight: 700;
    color: #1e40af;
    margin-bottom: 1.5rem;
}

.plan-price-premium {
    color: #6d28d9;
}

.plan-price-data {
    color: #047857;
}

.plan-price-vip {
    color: #92400e;
}

.plan-price-family {
    color: #be185d;
}

.price-period {
    font-size: 1rem;
    font-weight: 400;
    color: #6b7280;
}

.plan-features {
    list-style: none;
    margin-bottom: 2rem;
}

.plan-features li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    color: #4b5563;
}

.plan-features li:before {
    content: "✓";
    margin-right: 10px;
    color: #10b981;
    font-weight: bold;
}

.action-button {
    display: inline-block;
    width: 100%;
    padding: 12px 20px;
    background: linear-gradient(45deg, var(--primary), #3a7bfd);
    color: white;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: button;
    margin-top: 0;
}

.action-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(26, 86, 219, 0.3);
}

.premium-btn {
    background: linear-gradient(45deg, #7e22ce, #a855f7);
}

.data-btn {
    background: linear-gradient(45deg, #059669, #10b981);
}

.vip-btn {
    background: linear-gradient(45deg, #d97706, #f59e0b);
}

.family-btn {
    background: linear-gradient(45deg, #db2777, #ec4899);
}

/* 管理员面板样式 */
.admin-panel {
    display: none;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-top: 2rem;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.admin-title {
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: 600;
}

.plan-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--secondary);
}

.form-group input, 
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus, 
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.features-list {
    grid-column: span 2;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}

.feature-item input {
    flex: 1;
    margin-right: 0.5rem;
}

.add-feature {
    margin-top: 0.5rem;
    padding: 8px 12px;
    background: #e2e8f0;
    border: none;
    border-radius: 6px;
    cursor: button;
    transition: background 0.3s;
}

.add-feature:hover {
    background: #cbd5e0;
}

.admin-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.admin-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: button;
    transition: all 0.3s;
}

.save-btn {
    background: linear-gradient(45deg, #10b981, #059669);
    color: white;
}

.save-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(5, 150, 105, 0.3);
}

.cancel-btn {
    background: #e2e8f0;
    color: var(--secondary);
}

.cancel-btn:hover {
    background: #cbd5e0;
}

.add-plan-btn {
    background: linear-gradient(45deg, #3b82f6, #1d4ed8);
    color: white;
}

.add-plan-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(59, 130, 246, 0.3);
}

.login-form {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.login-form h2 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.login-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background: linear-gradient(45deg, var(--primary), #3a7bfd);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 1rem;
    cursor: button;
    transition: var(--transition);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(26, 86, 219, 0.3);
}

.login-message {
    text-align: center;
    color: #e53e3e;
    margin-top: 1rem;
    font-weight: 500;
    display: none;
}

.admin-link {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 101;
    background: #10b981;
    color: white;
    padding: 10px 15px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    transition: var(--transition);
    display: none;
}


.admin-link.visible {
    display: block; /* 显示按钮 */
    animation: pulse 2s; /* 添加动画效果 */
}

/* 删除按钮样式 */
.delete-btn {
    background: linear-gradient(45deg, #e53e3e, #c53030) !important;
    color: white !important;
}

.delete-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(229, 62, 62, 0.3);
}

/* 删除确认对话框样式优化 */
.confirm-dialog {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    text-align: center;
    width: 90%;
    max-width: 500px;
    animation: fadeIn 0.3s ease-out;
}

.confirm-dialog h3 {
    color: #e53e3e;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.confirm-text {
    margin: 1.5rem 0;
    font-size: 1.1rem;
    color: var(--secondary);
    line-height: 1.6;
}

.confirm-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.confirm-btn {
    padding: 10px 25px;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: button;
    transition: all 0.3s;
    font-size: 1rem;
}

.confirm-yes {
    background: linear-gradient(45deg, #e53e3e, #c53030);
    color: white;
    box-shadow: 0 4px 10px rgba(229, 62, 62, 0.25);
}

.confirm-yes:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(229, 62, 62, 0.35);
}

.confirm-no {
    background: #e2e8f0;
    color: var(--secondary);
}

.confirm-no:hover {
    background: #cbd5e0;
}

/* 添加背景遮罩 */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    backdrop-filter: blur(3px);
}



.sidebar-title {
    padding: 1.8rem 1.5rem 1.2rem;
    margin-bottom: 1rem;
    position: relative;
    background: linear-gradient(135deg, #1a56db, #3a7bfd);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
    text-align: center;
    overflow: hidden;
}

.sidebar-title:before {
    content: "";
    position: absolute;
    top: -20px;
    left: -20px;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    pointer-events: none;
}

.sidebar-title:after {
    content: "";
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.sidebar-title h2 {
    color: white;
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    margin: 0;
    padding: 0.8rem 0;
}

.sidebar-title h2:after {
    content: "";
    display: block;
    width: 60px;
    height: 3px;
    background: rgba(255, 255, 255, 0.5);
    margin: 0.6rem auto 0;
    border-radius: 2px;
}

/* 为导航链接添加额外上边距 */
.nav-links {
    margin-top: 0.5rem;
}

/* 调整侧边栏整体顶部内边距 */
.sidebar {
    padding: 0 0 2rem;
}

.official-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.official-card {
    display: flex;
    align-items: center;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 1.5rem;
    transition: var(--transition);
    text-decoration: none;
    color: var(--secondary);
}

.official-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.official-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    font-size: 1.8rem;
    color: white;
}

.bg-blue {
    background: linear-gradient(45deg, #3b82f6, #1d4ed8);
}

.bg-green {
    background: linear-gradient(45deg, #10b981, #059669);
}

.bg-purple {
    background: linear-gradient(45deg, #7e22ce, #a855f7);
}

.official-info h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.official-info p {
    color: #718096;
    font-size: 0.95rem;
    line-height: 1.4;
}

/* 通知列表 */
.notice-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.notice-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.notice-time {
    color: #718096;
    font-size: 0.9rem;
    margin: 0.5rem 0 1rem;
}

.notice-summary {
    color: #4a5568;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* 通知详情 */
.notice-content {
    padding: 1rem 0;
    line-height: 1.8;
    color: #4a5568;
}

.notice-content h1, .notice-content h2, .notice-content h3, .notice-content h4, .notice-content h5, .notice-content h6 {
    margin: 1.2rem 0 0.8rem;
    color: #2d3748;
}

/* 管理员通知列表 */
.admin-notice-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 1rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-notice-item h4 {
    flex: 1;
    margin: 0;
}

.admin-notice-item {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 1px solid #e2e8f0;
}

.admin-notice-item label {
    flex: 1;
    display: flex;
    align-items: center;
}

.admin-notice-item input[type="checkbox"] {
    margin-right: 10px;
}

.admin-notice-actions {
    display: flex;
    gap: 8px;
}

.admin-notice-item span {
    width: 180px;
    color: #718096;
    font-size: 0.9rem;
}

/* 激活按钮样式 */
.service-buttons {
    display: flex;
    gap: 20px;
    margin-left: auto;
    margin-bottom: 1.5rem;
}

.activation-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    transition: var(--transition);
}

.activation-btn img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 5px;
    transition: var(--transition);
}

.activation-btn span {
    color: var(--primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.activation-btn:hover img {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

.activation-btn:hover span {
    color: #e53e3e;
}

/* 添加模态框样式 */
.image-modal {
     position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}
        
.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    text-align: center;
}
        
.modal-content img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 8px;
}
        
.close {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
}
        
.close:hover {
    color: #ccc;
}
        
/* 按钮样式 */
.image-button {
    padding: 8px 12px;
    background: linear-gradient(45deg, #1a56db, #3a7bfd);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}
        
.image-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(26, 86, 219, 0.3);
}
        
/* 标题区域样式 */
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
        
.button-group {
    display: flex;
    gap: 10px;
}

#plan-details .plan-description {
    padding-bottom: 120px; /* 增加底部内边距，预留按钮空间 */
    position: relative; /* 确保内容区域正常布局 */
}

#plan-details .plan-action {
    position: relative; /* 改为相对定位 */
    width: auto; /* 取消固定宽度 */
    margin-top: 2rem; /* 增加顶部外边距 */
    text-align: center; /* 居中按钮 */
    left: auto; /* 重置定位 */
    right: auto; /* 重置定位 */
    bottom: auto; /* 重置定位 */
    display: flex; /* 使用flex布局 */
    justify-content: center; /* 水平居中 */
    gap: 20px; /* 按钮间距 */
}

/* 移除原绝对定位样式 */
#plan-details .plan-action {
    position: static !important; 
    bottom: auto !important;
    left: auto !important;
    right: auto !important;
}

/* 添加活动管理样式（参照通知管理） */
.admin-activity-item {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 1px solid #e2e8f0;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 1rem;
}

.admin-activity-item label {
    flex: 1;
    display: flex;
    align-items: center;
}

.admin-activity-item input[type="checkbox"] {
    margin-right: 10px;
}

.admin-activity-actions {
    display: flex;
    gap: 8px;
}

.admin-activity-item span {
    width: 180px;
    color: #718096;
    font-size: 0.9rem;
}

.activity-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.activity-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.activity-time {
    color: #718096;
    font-size: 0.9rem;
    margin: 0.5rem 0 1rem;
}

/* 漂浮备案信息 - 居中 */
.beian-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.85);
    text-align: center;
    font-size: 0.85rem;
    color: #718096;
    z-index: 90;
    backdrop-filter: blur(5px);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
    display: flex;
    justify-content: center; /* 添加水平居中 */
    align-items: center;     /* 添加垂直居中 */
    gap: 20px;
    animation: floatUp 0.5s ease-out forwards;
}

@keyframes floatUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.beian-footer p {
    margin: 0;
    line-height: 1.4;
}

.beian-footer a {
    color: #4a5568;
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 500;
}

.beian-footer a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {

    .sidebar.active ~ .main-content.expanded .header {
        position: relative; /* 改为相对定位 */
        z-index: 5; /* 降低z-index */
    }

    .main-content.expanded {
        margin-left: 0;
    }
    
    .floating-toggle {
        width: 55px;
        height: 55px;
        bottom: 1.5rem;
        right: 1.5rem;
    }
    
    .plan-form {
        grid-template-columns: 1fr;
    }
    
    .features-list {
        grid-column: span 1;
    }
    
    .admin-actions {
        flex-direction: column;
    }
    
    .confirm-actions {
        flex-direction: column;
    }
    
    .header {
        padding: 1rem;
        left: 0 !important;
        width: 100% !important;
    }
    
    .school-logo {
        width: 50px;
        height: 50px;
        margin-right: 10px;
    }
    
    .title {
        font-size: 1.5rem;
    }

    #registerButton {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    
    #registerButton i {
        display: none; /* 在小屏幕上隐藏图标 */
    }

    .official-links {
        grid-template-columns: 1fr;
    }
    
    .official-card {
        padding: 1.2rem;
    }
    
    .official-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    #plan-details .plan-action {
        flex-direction: column; /* 垂直排列按钮 */
        align-items: center;
    }

    .beian-footer {
        flex-direction: column;
        gap: 5px;
        padding: 8px 10px;
    }
}

@media (max-width: 480px) {
    #registerButton span {
        display: none; /* 在超小屏幕上只显示图标 */
    }
    
    #registerButton i {
        display: block;
    }

    /* 套餐容器 */
    .plans-container {
        grid-template-columns: 1fr; /* 单列布局 */
        justify-items: center; /* 水平居中 */
    }
  
    /* 套餐卡片 */
    .plan-card {
        width: 95%; /* 适当宽度 */
        max-width: 350px; /* 最大宽度限制 */
    }
  
    /* 官网导航容器 - 确保居中并自适应 */
  .official-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0;
  }
  
  /* 导航卡片 - 完全自适应宽度 */
  .official-card {
    width: 95%; /* 改为百分比宽度 */
    max-width: none; /* 移除最大宽度限制 */
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin: 10px auto;
    padding: 15px;
    box-sizing: border-box;
  }
  
    /* 图标和内容区域调整 */
    .official-icon {
        argin: 0 0 15px 0;
        width: 50px; /* 缩小图标 */
        height: 50px; /* 缩小图标 */
    }
  
    .official-info {
        width: 100%;
    }
  
    .official-info h3 {
        font-size: 1.3rem;
    }
}