/* 未来科技感黑金蓝主题 */
:root {
    /* 黑色系背景 */
    --bg-primary: #0a0e1a;
    --bg-secondary: #0d1117;
    --bg-tertiary: #161b22;
    --bg-card: rgba(22, 27, 34, 0.8);
    --bg-card-hover: rgba(30, 40, 55, 0.95);
    
    /* 金色系 */
    --gold-primary: #FFD700;
    --gold-secondary: #FFA500;
    --gold-accent: #FFC107;
    --gold-glow: rgba(255, 215, 0, 0.4);
    
    /* 蓝色系 */
    --blue-primary: #00D4FF;
    --blue-secondary: #0099FF;
    --blue-accent: #0066CC;
    --blue-dark: #003d7a;
    --blue-glow: rgba(0, 212, 255, 0.3);
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: #b0b8c4;
    --text-muted: #6e7681;
    
    /* 边框和分割线 */
    --border-color: rgba(255, 215, 0, 0.2);
    --border-blue: rgba(0, 212, 255, 0.3);
    --divider: rgba(255, 215, 0, 0.1);
    
    /* 阴影和发光 */
    --shadow-gold: 0 0 20px rgba(255, 215, 0, 0.3);
    --shadow-blue: 0 0 30px rgba(0, 212, 255, 0.4);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* 背景网格效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* 导航栏 - 未来科技感 */
.navbar {
    background: rgba(10, 14, 26, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 2px solid var(--border-color);
    padding: 1rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5), 0 0 20px var(--blue-glow);
    position: sticky;
    top: 0;
    z-index: 9998;
    transition: all 0.3s ease;
}

.navbar::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--gold-primary), 
        var(--blue-primary), 
        var(--gold-primary), 
        transparent
    );
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.navbar-brand {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 800;
    font-size: 2rem;
    background: linear-gradient(135deg, var(--gold-primary), var(--blue-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px var(--gold-glow);
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 0 10px var(--gold-primary));
}

.navbar-brand i {
    color: var(--gold-primary);
    text-shadow: 0 0 10px var(--gold-glow);
}

.navbar-toggler {
    background: rgba(255, 215, 0, 0.1) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-sm) !important;
    padding: 0.5rem !important;
    transition: all 0.3s ease;
}

.navbar-toggler:hover {
    background: rgba(255, 215, 0, 0.2) !important;
    box-shadow: 0 0 15px var(--gold-glow);
}

.navbar-toggler-icon {
    background-image: none !important;
    background-color: var(--gold-primary);
    height: 3px;
    width: 24px;
    border-radius: 2px;
    position: relative;
    box-shadow: 0 0 5px var(--gold-glow);
}

.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 3px;
    background-color: var(--gold-primary);
    border-radius: 2px;
    box-shadow: 0 0 5px var(--gold-glow);
    transition: all 0.3s ease;
}

.navbar-toggler-icon::before {
    top: -8px;
}

.navbar-toggler-icon::after {
    top: 8px;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
    background-color: transparent;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
    top: 0;
    transform: rotate(45deg);
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
    top: 0;
    transform: rotate(-45deg);
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--gold-primary), var(--blue-primary));
    transition: width 0.3s ease;
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 80%;
}

.nav-link:hover {
    color: var(--text-primary) !important;
    background: rgba(255, 215, 0, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--gold-glow);
}

.nav-link.active {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(0, 212, 255, 0.2));
    color: var(--text-primary) !important;
    box-shadow: 0 0 15px var(--gold-glow);
}

.nav-link i {
    color: var(--blue-primary);
    transition: all 0.3s ease;
}

.nav-link:hover i,
.nav-link.active i {
    color: var(--gold-primary);
    text-shadow: 0 0 10px var(--gold-glow);
}

/* 下拉菜单 */
.dropdown-menu {
    background: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-card), 0 0 20px var(--blue-glow);
    padding: 0.5rem;
    backdrop-filter: blur(20px);
    z-index: 9999 !important;
}

.dropdown-item {
    color: var(--text-secondary) !important;
    padding: 0.75rem 1rem !important;
    border-radius: var(--radius-sm) !important;
    transition: all 0.3s ease;
    margin: 2px 0;
}

.dropdown-item:hover {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(0, 212, 255, 0.15)) !important;
    color: var(--text-primary) !important;
    transform: translateX(5px);
    box-shadow: 0 0 10px var(--blue-glow);
}

.dropdown-divider {
    border-color: var(--divider);
    margin: 0.5rem 0;
}

/* 按钮 */
.btn {
    border-radius: var(--radius-md);
    font-weight: 600;
    padding: 0.75rem 2rem;
    border: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
    cursor: pointer;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue-primary), var(--blue-accent));
    color: var(--text-primary);
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px var(--blue-glow), var(--shadow-blue);
}

.btn-outline-primary {
    background: transparent;
    color: var(--blue-primary);
    border: 2px solid var(--blue-primary);
    box-shadow: 0 0 15px var(--blue-glow);
}

.btn-outline-primary:hover {
    background: var(--blue-primary);
    color: var(--bg-primary);
    box-shadow: 0 0 25px var(--blue-glow);
    transform: translateY(-3px);
}

.btn-light {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(0, 212, 255, 0.2));
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: 0 0 15px var(--gold-glow);
}

.btn-light:hover {
    background: linear-gradient(135deg, var(--gold-primary), var(--blue-primary));
    color: var(--bg-primary);
    box-shadow: 0 0 25px var(--gold-glow);
    transform: translateY(-3px);
}

/* 卡片 */
.card,
.photo-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
    position: relative;
    backdrop-filter: blur(10px);
}

.card::before,
.photo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gold-primary), var(--blue-primary));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::before,
.photo-card:hover::before {
    opacity: 1;
}

.card:hover,
.photo-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--gold-primary);
    box-shadow: var(--shadow-card), var(--shadow-gold), var(--shadow-blue);
    background: var(--bg-card-hover);
}

.photo-img {
    height: 220px;
    object-fit: cover;
    width: 100%;
    transition: transform 0.4s ease;
}

.photo-card:hover .photo-img {
    transform: scale(1.1);
}

.card-body {
    padding: 1.5rem;
    background: transparent;
    position: relative;
    z-index: 5;
}

.card-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.card-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.1) 0%, 
        rgba(255, 215, 0, 0.05) 50%, 
        rgba(0, 212, 255, 0.1) 100%);
    position: relative;
    padding: 80px 0;
    text-align: center;
    overflow: hidden;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    margin-bottom: 3rem;
    border-bottom: 2px solid var(--border-color);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(0,212,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero-section h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--gold-primary), var(--blue-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px var(--gold-glow);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        filter: drop-shadow(0 0 20px var(--gold-glow));
    }
    to {
        filter: drop-shadow(0 0 30px var(--blue-glow));
    }
}

.hero-section .lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 400;
}

/* 统计卡片 */
.stats-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(10px);
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 215, 0, 0.1), transparent);
    transition: left 0.6s;
}

.stats-card:hover::before {
    left: 100%;
}

.stats-card:hover {
    transform: translateY(-5px);
    border-color: var(--gold-primary);
    box-shadow: var(--shadow-card), var(--shadow-gold);
}

.stats-card h3 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--gold-primary), var(--blue-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 分类卡片 */
.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(10px);
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(255, 215, 0, 0.1) 0%, 
        rgba(0, 212, 255, 0.1) 50%, 
        rgba(255, 215, 0, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.category-card:hover::before {
    opacity: 1;
}

.category-card:hover {
    transform: translateY(-8px) scale(1.03);
    border-color: var(--gold-primary);
    box-shadow: var(--shadow-card), var(--shadow-gold), var(--shadow-blue);
}

.category-card h5 {
    position: relative;
    z-index: 2;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.category-card p {
    position: relative;
    z-index: 2;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0;
}

/* 表单元素 */
.form-control,
.form-select,
select.form-control,
textarea.form-control {
    background: var(--bg-tertiary) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    border-radius: var(--radius-md) !important;
    padding: 0.75rem 1rem !important;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.form-control:focus,
.form-select:focus,
select.form-control:focus,
textarea.form-control:focus {
    background: var(--bg-tertiary) !important;
    border-color: var(--blue-primary) !important;
    color: var(--text-primary) !important;
    box-shadow: 0 0 0 3px var(--blue-glow), 0 0 20px var(--blue-glow);
    outline: none;
}

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

.form-label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* 表格 */
.table {
    color: var(--text-primary);
    border-color: var(--border-color);
}

.table thead th {
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    background: var(--bg-card);
}

.table td,
.table th {
    border-color: var(--border-color);
    padding: 1rem;
}

.table-hover tbody tr:hover {
    background-color: rgba(255, 215, 0, 0.1);
    border-radius: var(--radius-sm);
}

/* 分页 */
.pagination .page-link {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    margin: 0 4px;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.pagination .page-link:hover {
    background-color: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--blue-primary);
    transform: translateY(-2px);
    box-shadow: 0 0 15px var(--blue-glow);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, var(--blue-primary), var(--blue-accent));
    border-color: var(--blue-primary);
    color: var(--text-primary);
    box-shadow: 0 0 20px var(--blue-glow);
}

/* 徽章 */
.badge {
    border-radius: var(--radius-sm);
    font-weight: 600;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.bg-primary {
    background: linear-gradient(135deg, var(--blue-primary), var(--blue-accent)) !important;
}

.bg-danger {
    background: var(--danger-color) !important;
    color: white !important;
}

.bg-warning {
    background: var(--gold-primary) !important;
    color: var(--bg-primary) !important;
}

.bg-success {
    background: var(--success-color) !important;
    color: white !important;
}

.bg-secondary {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    color: var(--text-primary);
    padding: 60px 0 40px;
    margin-top: 80px;
    border-top: 2px solid var(--border-color);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold-primary), var(--blue-primary), var(--gold-primary), transparent);
    animation: shimmer 3s infinite;
}

.footer-brand {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--gold-primary), var(--blue-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.footer-links a,
.footer-contact a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover,
.footer-contact a:hover {
    color: var(--gold-primary);
    transform: translateX(5px);
    text-shadow: 0 0 10px var(--gold-glow);
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--gold-primary), var(--blue-primary));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--blue-primary), var(--gold-primary));
}

/* 文本工具类 */
.text-gradient {
    background: linear-gradient(135deg, var(--gold-primary), var(--blue-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-muted {
    color: var(--text-muted) !important;
}

.text-secondary {
    color: var(--text-secondary) !important;
}

/* 标题 */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
}

h2 {
    font-weight: 700;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--gold-primary), var(--blue-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 1rem;
}

h2 i {
    font-size: 2rem;
    color: var(--blue-primary);
    text-shadow: 0 0 10px var(--blue-glow);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section {
        padding: 40px 0;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .hero-section .lead {
        font-size: 1.1rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .navbar-brand {
        font-size: 1.5rem;
    }
}

/* 动画 */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-in;
}

/* 容器 */
.container {
    position: relative;
    z-index: 1;
}

/* 水印和版权 */
.watermark {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(10, 14, 26, 0.9);
    color: var(--gold-primary);
    padding: 8px 16px;
    font-size: 12px;
    border-radius: var(--radius-md);
    font-weight: 600;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    box-shadow: 0 0 15px var(--gold-glow);
}

.copyright-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.95);
    color: var(--text-secondary);
    padding: 8px 20px;
    font-size: 11px;
    display: flex;
    justify-content: space-between;
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
}

/* 警告框 */
.alert {
    border-radius: var(--radius-md);
    border: 1px solid;
    padding: 1rem 1.5rem;
    font-weight: 500;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(10px);
}

.alert-success {
    background: rgba(76, 175, 80, 0.2);
    border-color: var(--success-color);
    color: var(--text-primary);
}

.alert-warning {
    background: rgba(255, 215, 0, 0.2);
    border-color: var(--gold-primary);
    color: var(--text-primary);
}

.alert-danger {
    background: rgba(244, 67, 54, 0.2);
    border-color: var(--danger-color);
    color: var(--text-primary);
}

.alert-info {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--blue-primary);
    color: var(--text-primary);
}

/* 模态框 */
.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card), 0 0 30px var(--blue-glow);
    backdrop-filter: blur(20px);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(0, 212, 255, 0.1));
}

.modal-footer {
    border-top: 1px solid var(--border-color);
}

.modal-title {
    color: var(--text-primary);
}

.btn-close {
    filter: invert(1);
}