:root {
    /* ------ 默认浅色模式 (Light Mode) ------ */
    --bg-color: #f5f7fa;
    --text-color: #2c3e50;
    --text-muted: #6c757d;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --navbar-bg: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.9);
    --input-bg: #ffffff;
    --input-color: #212529;
    --table-head-bg: #f8f9fa;
    --table-border: #dee2e6;
    --code-bg: #f8f9fa;
    --code-color: #212529;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --badge-bg: #e9ecef;
    --badge-color: #212529;
    
    /* Market Specific */
    --category-title-color: #2c3e50;
    --price-tag-color: #0d6efd;
    --price-tag-shadow: none;

    /* Landing Page Specific */
    --hero-bg-pattern: 
        linear-gradient(rgba(13, 110, 253, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(13, 110, 253, 0.03) 1px, transparent 1px),
        radial-gradient(circle at 15% 50%, rgba(13, 110, 253, 0.05), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(13, 202, 240, 0.05), transparent 25%);
    --hero-text-shadow: none;
    --hero-title-gradient: linear-gradient(90deg, #0d6efd, #0dcaf0);
}

[data-theme="dark"] {
    /* ------ 深色模式 (Dark Mode) ------ */
    --bg-color: #0f0f13;
    --text-color: #d1d5db;         /* 更柔和的灰白色 */
    --text-muted: #9ca3af;         /* 更柔和的灰色 */
    --card-bg: rgba(30, 30, 40, 0.8);
    --border-color: rgba(255, 255, 255, 0.1); 
    --primary-color: #3d8bfd;
    --secondary-color: #a0a0a0;
    --navbar-bg: rgba(15, 15, 19, 0.95);
    --glass-bg: rgba(30, 30, 40, 0.6);
    --input-bg: rgba(20, 20, 25, 0.6);
    --input-color: #e5e7eb;
    --table-head-bg: rgba(255, 255, 255, 0.05);
    --table-border: rgba(255, 255, 255, 0.1);
    --code-bg: #1a1a1a;
    --code-color: #dcdcdc;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --badge-bg: rgba(255, 255, 255, 0.1);
    --badge-color: #ffffff;

    /* Market Specific */
    --category-title-color: #fff;
    --price-tag-color: #00d2ff;
    --price-tag-shadow: 0 0 10px rgba(0, 210, 255, 0.3);

    /* Landing Page Specific */
    --hero-bg-pattern: 
        linear-gradient(rgba(0, 242, 254, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 242, 254, 0.03) 1px, transparent 1px),
        radial-gradient(circle at 15% 50%, rgba(79, 172, 254, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(247, 37, 133, 0.15), transparent 25%);
    --hero-text-shadow: 0 0 30px rgba(0, 242, 254, 0.3);
    --hero-title-gradient: none; /* Dark mode uses white text with shadow */
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

/* 链接颜色 */
a {
    color: var(--primary-color);
    text-decoration: none;
}
a:hover {
    color: #6ea8fe;
    text-decoration: underline;
}

/* 卡片样式 */
.card, .auth-card {
    background: var(--card-bg) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-color);
    box-shadow: 0 4px 12px var(--shadow-color);
    backdrop-filter: blur(10px);
}
.card-header {
    border-bottom: 1px solid var(--border-color) !important;
    background-color: transparent !important;
}

/* 导航栏 */
.navbar {
    background-color: var(--navbar-bg) !important;
    border-bottom: 1px solid var(--border-color) !important;
    transition: background-color 0.3s;
}
.navbar-brand, .nav-link {
    color: var(--text-color) !important;
}
.navbar-toggler {
    border-color: var(--border-color);
}
.navbar-toggler-icon {
    filter: invert(0.5); 
}
[data-theme="dark"] .navbar-toggler-icon {
    filter: invert(1);
}

/* 表格样式 - 强制背景透明以适应深色模式 */
.table {
    color: var(--text-color) !important;
    border-color: var(--table-border) !important;
    background-color: transparent !important;
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-color);
}
.table th {
    background-color: var(--table-head-bg) !important;
    color: var(--text-color) !important;
    border-bottom: 2px solid var(--border-color) !important;
    font-weight: 600;
}
.table td {
    background-color: transparent !important;
    border-color: var(--border-color) !important;
    color: var(--text-color) !important;
}
.table .text-muted {
    color: var(--text-muted) !important;
}
.table-hover tbody tr:hover td {
    color: var(--text-color);
    background-color: rgba(255,255,255,0.05) !important;
}
[data-theme="light"] .table-hover tbody tr:hover td {
    background-color: rgba(0,0,0,0.05) !important;
}

/* 输入框 */
.form-control, .form-select, .input-group-text {
    background-color: var(--input-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--input-color) !important;
}
.form-control:focus, .form-select:focus {
    background-color: var(--input-bg) !important;
    border-color: var(--primary-color) !important;
    color: var(--input-color) !important;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}
.form-control::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

/* 代码块 */
pre, code {
    font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
}
pre {
    background: var(--code-bg);
    color: var(--code-color);
    border: 1px solid var(--border-color);
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
}

/* 按钮 */
.btn-outline-secondary, .btn-outline-light {
    color: var(--text-color);
    border-color: var(--border-color);
}
.btn-outline-secondary:hover, .btn-outline-light:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
}

/* Badge */
.badge.bg-light {
    background-color: var(--badge-bg) !important;
    color: var(--badge-color) !important;
    border: 1px solid var(--border-color);
}

/* 辅助类覆盖 */
.text-muted { color: var(--text-muted) !important; }
.text-white-50 { color: var(--text-muted) !important; }
.text-white { color: var(--text-color) !important; }
.bg-light { background-color: transparent !important; }
.border-secondary { border-color: var(--border-color) !important; }

/* 面包屑导航 */
.breadcrumb-item a { color: var(--secondary-color); text-decoration: none; }
.breadcrumb-item.active { color: var(--text-muted); }

/* 主题切换按钮 */
.theme-toggle-btn {
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.375rem 0.75rem;
    border-radius: 50%;
    transition: all 0.3s;
    color: var(--text-color);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}
.theme-toggle-btn:hover {
    background-color: var(--border-color);
}

/* API 市场特定样式 */
.api-card {
    transition: all 0.3s;
    height: 100%;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}
.api-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--shadow-color);
    border-color: var(--primary-color);
}
.price-tag { 
    font-size: 1.1rem; 
    font-weight: bold; 
    color: var(--price-tag-color);
    text-shadow: var(--price-tag-shadow);
}
.category-title {
    position: relative;
    padding-left: 15px;
    margin-bottom: 20px;
    margin-top: 40px;
    color: var(--category-title-color);
    font-weight: bold;
    border-left: 4px solid var(--primary-color);
}

/* 余额卡片 */
.card-balance { 
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.1), rgba(79, 172, 254, 0.2)) !important;
    border: 1px solid rgba(0, 242, 254, 0.3) !important;
}
[data-theme="light"] .card-balance {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb) !important;
    border: 1px solid #90caf9 !important;
}
[data-theme="light"] .card-balance h2 {
    color: #0d47a1 !important;
}
[data-theme="light"] .card-balance .card-title {
    color: #1565c0 !important;
}

/* 首页 Landing Page 样式 */
.hero-section { 
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px;
    text-align: center; 
    position: relative;
    overflow: hidden;
    background-image: var(--hero-bg-pattern);
    background-size: 40px 40px, 40px 40px, 100% 100%, 100% 100%;
    background-position: center;
    background-attachment: fixed;
}
.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 25px;
    color: var(--text-color);
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}
.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px var(--shadow-color);
    border-color: var(--primary-color);
}
.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 30%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.btn-glow {
    background: linear-gradient(90deg, var(--primary-color), #4facfe);
    color: #fff;
    border: none;
    box-shadow: 0 0 20px rgba(79, 172, 254, 0.4);
    font-weight: 600;
    transition: all 0.3s;
}
.btn-glow:hover {
    transform: scale(1.05);
    color: #fff;
    box-shadow: 0 0 30px rgba(79, 172, 254, 0.6);
}
.btn-outline-custom {
    color: var(--text-color);
    border: 1px solid var(--border-color);
    background: transparent;
    transition: all 0.3s;
}
.btn-outline-custom:hover {
    background: var(--border-color);
    color: var(--text-color);
}
.hero-title {
    font-weight: 800;
    color: var(--text-color);
    letter-spacing: -1px;
    text-shadow: var(--hero-text-shadow);
}
[data-theme='light'] .hero-title {
    background: var(--hero-title-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}