/* ========== TCMOI 全局样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: #ffffff;
    color: #1a2a2f;
    line-height: 1.5;
    scroll-behavior: smooth;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 颜色变量 */
:root {
    --tcm-red: #9e2a2b;
    --tcm-red-dark: #7f1e1f;
    --tcm-sage: #eef2e6;
    --tcm-slate: #2c3e2f;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

/* ========== 导航栏 ========== */
.navbar {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 50;
    padding: 16px 0;
}

.nav-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.6rem;
    letter-spacing: -0.01em;
    text-decoration: none;
}

.logo-text {
    background: linear-gradient(135deg, #9e2a2b 0%, #c73b3c 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.logo-badge {
    background: var(--tcm-red);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 20px;
    margin-left: 8px;
}

.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-800);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--tcm-red);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--gray-800);
}

/* ========== 按钮样式 ========== */
.btn-outline {
    border: 1px solid var(--gray-200);
    padding: 8px 18px;
    border-radius: 40px;
    background: white;
    font-weight: 500;
    transition: all 0.2s;
    text-decoration: none;
    color: var(--gray-800);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-outline:hover {
    border-color: var(--tcm-red);
    color: var(--tcm-red);
    background: #fff8f8;
}

.btn-primary {
    background: var(--tcm-red);
    color: white;
    padding: 10px 24px;
    border-radius: 40px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background: var(--tcm-red-dark);
}

.btn-secondary {
    background: white;
    border: 1px solid var(--gray-200);
    color: var(--gray-800);
    padding: 10px 24px;
    border-radius: 40px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}

.btn-secondary:hover {
    border-color: var(--tcm-red);
    color: var(--tcm-red);
}

/* ========== 页面头部 ========== */
.page-header {
    padding: 48px 0 32px;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 1.2rem;
    color: var(--gray-600);
    max-width: 700px;
}

/* ========== 页脚 ========== */
.footer {
    border-top: 1px solid var(--gray-200);
    padding: 48px 0 32px;
    margin-top: 64px;
    background: var(--gray-50);
}

.footer-flex {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 32px;
}

.footer-links {
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
}

.footer-links a {
    text-decoration: none;
    color: var(--gray-600);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--tcm-red);
}

.copyright {
    text-align: center;
    margin-top: 48px;
    color: var(--gray-600);
    font-size: 0.85rem;
}

/* ========== 辅助样式 ========== */
.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-flex {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 16px;
        padding: 20px 0 10px;
        border-top: 1px solid var(--gray-200);
    }
    
    .nav-links.show {
        display: flex;
    }
    
    .page-header {
        padding: 32px 0 20px;
    }
    
    .page-header h1 {
        font-size: 1.8rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .footer-flex {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.3rem;
    }
    
    .btn-primary, .btn-outline {
        padding: 6px 14px;
        font-size: 0.85rem;
    }
    
    .nav-links {
        gap: 12px;
    }
}