/* 现代CSS重置和基础样式 */
:root {
    /* 颜色系统 */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    --primary-300: #7dd3fc;
    --primary-400: #38bdf8;
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;
    --primary-800: #075985;
    --primary-900: #0c4a6e;
    
    /* 渐变背景 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #42e695 0%, #3bb2b8 100%);
    --gradient-warning: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
    --gradient-danger: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-dark: linear-gradient(135deg, #141e30 0%, #243b55 100%);
    
    /* 深色主题变量 */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    /* 间距系统 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* 圆角系统 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* 动画曲线 */
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    
    /* 字体系统 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
    
    /* 响应式断点 */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
}

/* 现代CSS重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0, transparent 50%),
        radial-gradient(at 100% 0%, rgba(168, 85, 247, 0.15) 0, transparent 50%),
        radial-gradient(at 100% 100%, rgba(236, 72, 153, 0.1) 0, transparent 50%);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 文本样式 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
}

a {
    color: var(--primary-400);
    text-decoration: none;
    transition: color 0.2s var(--ease-in-out);
}

a:hover {
    color: var(--primary-300);
}

/* 玻璃态效果 */
.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

/* 卡片组件 */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: all 0.3s var(--ease-in-out);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2xl);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

/* 按钮组件 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.875rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s var(--ease-in-out);
    border: none;
    outline: none;
    user-select: none;
    text-decoration: none;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn:active::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(40, 40);
        opacity: 0;
    }
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-glass);
    border-color: var(--primary-400);
}

.btn-success {
    background: var(--gradient-success);
    color: white;
}

.btn-danger {
    background: var(--gradient-danger);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 表单组件 */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s var(--ease-in-out);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right 1rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

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

/* 徽章 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.badge-primary {
    background: var(--primary-500);
    color: white;
    border: none;
}

.badge-success {
    background: var(--gradient-success);
    color: white;
    border: none;
}

/* 列表组件 */
.list-group {
    list-style: none;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.list-item {
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

.list-item:hover {
    background: var(--bg-glass);
}

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

/* 表格组件 */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-lg);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
}

.table th {
    background: var(--bg-glass);
    padding: var(--space-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.table td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background: var(--bg-glass);
}

/* 模态框 */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-md);
    animation: fadeIn 0.3s var(--ease-out);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s var(--ease-out);
}

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

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

.modal-body {
    padding: var(--space-lg);
}

.modal-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
}

/* 加载动画 */
.loading {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-400);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-glass) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* 工具类 */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }

.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.m-0 { margin: 0 !important; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--space-xs); }
.p-2 { padding: var(--space-sm); }
.p-3 { padding: var(--space-md); }
.p-4 { padding: var(--space-lg); }
.p-5 { padding: var(--space-xl); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

.select-none { user-select: none; }
.pointer-events-none { pointer-events: none; }

.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-xs { max-width: 20rem; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }

/* 响应式工具类 */
@media (min-width: 640px) {
    .sm\:d-none { display: none !important; }
    .sm\:d-block { display: block !important; }
    .sm\:d-flex { display: flex !important; }
}

@media (min-width: 768px) {
    .md\:d-none { display: none !important; }
    .md\:d-block { display: block !important; }
    .md\:d-flex { display: flex !important; }
}

@media (min-width: 1024px) {
    .lg\:d-none { display: none !important; }
    .lg\:d-block { display: block !important; }
    .lg\:d-flex { display: flex !important; }
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--primary-600);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-500);
}

/* 移动端优化 */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .card {
        padding: var(--space-md);
        border-radius: var(--radius-lg);
    }
    
    .modal-content {
        max-height: 85vh;
        margin: var(--space-md);
    }
    
    .table-responsive {
        margin: 0 calc(var(--space-md) * -1);
        padding: 0 var(--space-md);
    }
}

/* 打印样式 */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* 无障碍优化 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 主题切换过渡 */
* {
    transition: background-color 0.3s var(--ease-in-out),
                border-color 0.3s var(--ease-in-out),
                color 0.3s var(--ease-in-out);
}