/* frontend.css - 前台共享样式 */
/* 供index.php、tool/index.php等前端页面共用 */

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --secondary: #1e40af;
    --secondary-light: #3b82f6;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --success: #10b981;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: var(--gray-700);
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 400px);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 滚动条美化 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: #e9eef3; border-radius: 12px; }
::-webkit-scrollbar-thumb { background: #b9c3d0; border-radius: 12px; }
::-webkit-scrollbar-thumb:hover { background: #8f9eb0; }

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 按钮基础样式 */
.btn {
    padding: 14px 32px;
    border-radius: var(--radius-lg);
    font-weight: 800;
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: var(--white);
    box-shadow: var(--shadow-lg), 0 4px 20px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl), 0 8px 30px rgba(245, 158, 11, 0.4);
    color: var(--white);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
    color: var(--white);
    box-shadow: var(--shadow-lg), 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl), 0 8px 30px rgba(59, 130, 246, 0.4);
    color: var(--white);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 120px 60px;
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
}

/* 页脚统一样式 */
.footer {
    background: linear-gradient(135deg, var(--primary) 0%, #020617 100%);
    color: var(--gray-400);
    padding: 100px 0 50px;
    margin-top: 100px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--secondary) 0%, var(--accent) 50%, var(--secondary) 100%);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-logo .logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.6rem;
    flex-shrink: 0;
}

.footer-logo .logo-text {
    font-size: 1.3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--white) 0%, var(--gray-200) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-title {
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 28px;
    position: relative;
    padding-bottom: 16px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-light) 100%);
    border-radius: 2px;
}

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

.footer-links li {
    margin-bottom: 14px;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--accent-light);
    padding-left: 8px;
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--gray-800);
    text-align: center;
    font-size: 0.9rem;
}

/* 响应式 */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    .container { padding: 0 16px; }
}

@media (max-width: 640px) {
    .footer-grid { grid-template-columns: 1fr; }
}