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

/* CSS变量系统 - 与主站保持一致 */
:root {
    /* 现代白天主题 */
    --bg-primary: rgba(255, 255, 255, 0.95);
    --bg-secondary: rgba(248, 250, 252, 0.95);
    --bg-body: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 30%, #cbd5e1 100%);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-color: #3b82f6;
    --accent-secondary: #06b6d4;
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-bg-hover: rgba(255, 255, 255, 0.98);
    --shadow-color: rgba(15, 23, 42, 0.08);
    --shadow-hover: rgba(15, 23, 42, 0.15);
    --border-color: rgba(226, 232, 240, 0.8);
    --glass-blur: 25px;
    --glass-border: 1px solid rgba(226, 232, 240, 0.6);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

body.dark-theme {
    /* 夜晚主题 */
    --bg-primary: rgba(26, 26, 46, 0.85);
    --bg-secondary: rgba(22, 33, 62, 0.9);
    --bg-body: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --accent-color: #e74c3c;
    --accent-secondary: #f39c12;
    --card-bg: rgba(30, 30, 50, 0.85);
    --card-bg-hover: rgba(40, 40, 60, 0.95);
    --shadow-color: rgba(0, 0, 0, 0.5);
    --shadow-hover: rgba(0, 0, 0, 0.7);
    --border-color: rgba(255, 255, 255, 0.15);
    --glass-blur: 25px;
    --glass-border: 1px solid rgba(255, 255, 255, 0.2);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --gradient-primary: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    --gradient-secondary: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
    --gradient-accent: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
}

/* 屏幕阅读器专用样式 */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

body {
    font-family: 'Inter', 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-body);
    background-attachment: fixed;
    background-size: cover;
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    transition: all 0.5s ease;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    animation: fadeInScale 0.8s ease-out;
    position: relative;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.98) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* 顶部导航栏 */
.header {
    margin-bottom: 32px;
    position: relative;
}

.site-title {
    text-align: center;
    margin-bottom: 28px;
    position: relative;
}

.site-title h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.5px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.site-title h1::after {
    content: '📝';
    position: absolute;
    top: -10px;
    right: -40px;
    font-size: 1.5rem;
    background: var(--card-bg);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px var(--shadow-color);
    border: 2px solid var(--accent-color);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* 主题切换按钮 */
.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--card-bg);
    border: none;
    border-radius: 12px;
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--accent-color);
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: 0 4px 15px var(--shadow-color);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
}

.theme-toggle:hover {
    transform: rotate(180deg) scale(1.1);
    box-shadow: 0 6px 20px var(--shadow-hover);
}

.theme-toggle i {
    transition: all 0.3s ease;
}

body.dark-theme .theme-toggle i {
    transform: rotate(180deg);
}

.search-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    background: var(--card-bg);
    padding: 20px 24px;
    border-radius: 16px;
    box-shadow: 0 8px 32px var(--shadow-color);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
    transition: all 0.3s ease;
}

.search-bar:hover {
    box-shadow: 0 12px 40px var(--shadow-hover);
}

.search-input {
    flex: 1;
    max-width: 400px;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: var(--card-bg);
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.add-requirement-btn {
    padding: 14px 28px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
}

.add-requirement-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
    background: var(--gradient-accent);
}

.add-requirement-btn::before {
    content: '✨';
    font-size: 16px;
}

/* 状态筛选栏 */
.status-filter {
    margin-bottom: 32px;
}

.filter-tabs {
    display: flex;
    gap: 8px;
    background: var(--card-bg);
    padding: 8px;
    border-radius: 16px;
    box-shadow: 0 4px 20px var(--shadow-color);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
}

.filter-tab {
    flex: 1;
    padding: 14px 20px;
    background: transparent;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    color: var(--text-secondary);
    position: relative;
    overflow: hidden;
}

.filter-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.6s ease;
}

.filter-tab:hover::before {
    left: 100%;
}

.filter-tab:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    transform: translateY(-2px);
}

.filter-tab.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
    transform: translateY(-2px);
}

/* 便利贴网格 */
.memos-grid {
    margin-top: 24px;
}

.memos-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    min-height: 200px;
}

/* 便利贴样式 - 现代化设计 */
.memo-item {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 8px 32px var(--shadow-color);
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
}

.memo-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--border-color);
    transition: all 0.3s ease;
}

.memo-item.waiting::before {
    background: linear-gradient(90deg, var(--error-color), #ff6b6b);
}

.memo-item.in_progress::before {
    background: linear-gradient(90deg, var(--warning-color), #ffd93d);
}

.memo-item.completed::before {
    background: linear-gradient(90deg, var(--success-color), #51cf66);
}

.memo-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 48px var(--shadow-hover);
    background: var(--card-bg-hover);
}

.memo-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.memo-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.4;
}

.memo-player {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.memo-player::before {
    content: '👤 ';
    opacity: 0.7;
}

.memo-status {
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.memo-status.waiting {
    background: var(--error-color);
    color: white;
}

.memo-status.in_progress {
    background: var(--warning-color);
    color: white;
}

.memo-status.completed {
    background: var(--success-color);
    color: white;
}

.memo-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.memo-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.memo-date::before {
    content: '🕒 ';
    opacity: 0.7;
}

/* 管理员回复样式 */
.admin-reply {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(6, 182, 212, 0.05));
    border-left: 3px solid var(--accent-color);
    padding: 16px;
    margin: 16px 0;
    border-radius: 12px;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.admin-reply-label {
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 8px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.admin-reply-label::before {
    content: '💬';
}

.admin-reply-content {
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.admin-reply-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: right;
}

.has-reply {
    background: var(--success-color);
    color: white;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

.has-reply::before {
    content: '✅';
    font-size: 0.8rem;
}

/* 弹框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 20px 60px var(--shadow-hover);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 28px 28px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
    transform: scale(1.1);
}

.modal-body {
    padding: 28px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    font-family: inherit;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: var(--card-bg);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-secondary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-actions {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
    margin-top: 28px;
}

.cancel-btn {
    padding: 14px 28px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cancel-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.submit-btn {
    padding: 14px 28px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
    background: var(--gradient-accent);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 加载状态 */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 500;
}

/* 错误和成功消息样式 */
.error {
    background: var(--error-color);
    color: white;
    padding: 16px 24px;
    border-radius: 12px;
    margin-bottom: 24px;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
    animation: slideInRight 0.3s ease-out;
    font-weight: 500;
}

.success {
    background: var(--success-color);
    color: white;
    padding: 16px 24px;
    border-radius: 12px;
    margin-bottom: 24px;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    animation: slideInRight 0.3s ease-out;
    font-weight: 500;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    
    .site-title h1 {
        font-size: 2rem;
    }
    
    .site-title h1::after {
        right: -30px;
        width: 32px;
        height: 32px;
        font-size: 1.2rem;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .search-bar {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
    }
    
    .search-input {
        max-width: 100%;
    }
    
    .filter-tabs {
        flex-wrap: wrap;
    }
    
    .filter-tab {
        min-width: calc(50% - 4px);
    }
    
    .memos-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .modal-header,
    .modal-body {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .site-title h1 {
        font-size: 1.8rem;
    }
    
    .filter-tab {
        min-width: 100%;
        margin-bottom: 4px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .cancel-btn,
    .submit-btn {
        width: 100%;
    }
    
    .memo-item {
        padding: 20px;
    }
}

/* 页面加载动画 */
body {
    opacity: 0;
    animation: pageLoad 0.8s ease-out forwards;
}

@keyframes pageLoad {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-accent);
}

/* 选择文本的样式 */
::selection {
    background: rgba(59, 130, 246, 0.3);
    color: var(--text-primary);
}

body.dark-theme ::selection {
    background: rgba(231, 76, 60, 0.3);
    color: white;
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}