/* common/styles.css - 全站公共样式 */

:root {
    --color-primary: #d14c2a;
    --color-primary-hover: #b03e1f;
    --color-dark: #1a2c3e;
    --color-dark-2: #0f1e2a;
    --color-text: #333;
    --color-text-light: #666;
    --color-text-muted: #888;
    --color-bg: #f5f7fa;
    --color-bg-alt: #f8f9fa;
    --color-border: #e8e8e8;
    --color-border-light: #e9ecef;
    --color-white: #fff;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
    --transition: all 0.25s ease;
    --font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    --container-width: 1100px;
}

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

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    min-height: 100vh;
    color: var(--color-text);
    line-height: 1.7;
}

/* 通用容器 */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 40px 20px;
}

/* 页面头部 */
.page-header {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-2) 100%);
    color: white;
    padding: 50px 20px 40px;
    text-align: center;
}
.page-header h1 { font-size: 32px; margin-bottom: 10px; }
.page-header p { font-size: 15px; color: #a0c4d8; max-width: 700px; margin: 0 auto; line-height: 1.6; }

/* 返回链接 */
.back-link {
    display: inline-block;
    margin-bottom: 18px;
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}
.back-link:hover { color: var(--color-primary); }

/* 卡片 */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.card h3 { font-size: 18px; color: var(--color-dark); margin-bottom: 10px; font-weight: 600; }
.card p { font-size: 14px; color: var(--color-text-light); line-height: 1.7; }

/* 网格布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

/* 介绍区域 */
.intro-section {
    background: var(--color-white);
    padding: 35px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    margin-bottom: 40px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}
.intro-section h2 { font-size: 24px; color: var(--color-dark); margin-bottom: 15px; }
.intro-section p { font-size: 15px; color: var(--color-text-light); line-height: 1.7; max-width: 800px; margin: 0 auto; }

/* 指标/知识点区域 */
.tips-section {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 35px;
    border: 1px solid var(--color-border-light);
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
}
.tips-section h2 { font-size: 24px; color: var(--color-dark); margin-bottom: 25px; text-align: center; }

.category-section {
    margin-bottom: 35px;
    border-bottom: 1px solid #eee;
    padding-bottom: 25px;
}
.category-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.category-title {
    font-size: 20px;
    color: var(--color-dark);
    margin-bottom: 18px;
    padding-left: 12px;
    border-left: 4px solid var(--color-primary);
}

.tips-list { display: grid; gap: 14px; }

.tip-item {
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    padding: 18px;
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
}
.tip-item:hover { box-shadow: 0 2px 12px rgba(0,0,0,0.06); }
.tip-item h4 { font-size: 15px; color: var(--color-dark); margin-bottom: 8px; font-weight: 600; }
.tip-item p.desc { font-size: 13px; color: #555; margin-bottom: 8px; }
.tip-item p.content { font-size: 13px; color: var(--color-text-light); line-height: 1.7; }

/* CTA区域 */
.cta-section {
    text-align: center;
    padding: 45px 30px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
}
.cta-section h2 { font-size: 24px; color: var(--color-dark); margin-bottom: 12px; }
.cta-section p { color: var(--color-text-light); font-size: 15px; margin-bottom: 22px; }

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 40px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--color-dark); border: 2px solid var(--color-dark); }
.btn-outline:hover { background: var(--color-dark); color: white; }

/* FAQ区域 */
.faq-section {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 35px;
    border: 1px solid var(--color-border-light);
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
}
.faq-section h2 { font-size: 24px; color: var(--color-dark); margin-bottom: 25px; text-align: center; }
.faq-item {
    border-bottom: 1px solid #eee;
    padding: 18px 0;
}
.faq-item:last-child { border-bottom: none; }
.faq-item {
    border-bottom: 1px solid #eee;
}
.faq-item summary {
    list-style: none;
    cursor: pointer;
}
.faq-item summary::-webkit-details-marker {
    display: none;
}
.faq-item summary::after {
    content: '+';
    margin-left: auto;
    font-size: 20px;
    color: var(--color-primary);
    font-weight: 700;
    transition: transform 0.2s;
}
.faq-item[open] summary::after {
    transform: rotate(45deg);
}
.faq-question {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-dark);
    padding: 12px 0;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.faq-question::before {
    content: 'Q';
    background: var(--color-primary);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}
.faq-answer {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
    padding: 8px 0 12px 34px;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 12px 20px;
    max-width: var(--container-width);
    margin: 0 auto;
    font-size: 13px;
    color: var(--color-text-muted);
}
.breadcrumb-link {
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition);
}
.breadcrumb-link:hover { color: var(--color-primary); }
.breadcrumb-sep { margin: 0 6px; color: #ccc; }
.breadcrumb-current { color: var(--color-text); font-weight: 500; }

/* 相关服务推荐 */
.related-services {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 30px;
    border: 1px solid var(--color-border-light);
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
}
.related-services h2 { font-size: 20px; color: var(--color-dark); margin-bottom: 18px; }
.related-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.related-link {
    display: block;
    padding: 14px 18px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border-light);
    text-decoration: none;
    color: var(--color-dark);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}
.related-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 25px 20px;
    color: var(--color-text-muted);
    font-size: 13px;
    border-top: 1px solid var(--color-border);
    margin-top: 30px;
}
.footer-inner { padding: 0 20px; }
.footer p { margin: 4px 0; }
.footer a {
    color: var(--color-text-light);
    text-decoration: none;
    transition: color 0.25s ease;
    font-size: 13px;
}
.footer a:hover { color: var(--color-primary); }
.footer-nav {
    margin-top: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.footer-nav.secondary { margin-top: 10px; }
.footer-nav-label {
    font-weight: 600;
    color: var(--color-dark);
    font-size: 14px;
}
.footer-nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}
.footer-nav.secondary .footer-nav-links { gap: 20px; }
.footer-nav-links .contact-link { color: var(--color-primary); font-weight: 600; }

/* 响应式 */
@media (max-width: 768px) {
    .page-header h1 { font-size: 24px; }
    .container { padding: 25px 16px; }
    .grid { grid-template-columns: 1fr; }
    .intro-section, .tips-section, .cta-section { padding: 20px 16px; }
    .btn { padding: 10px 24px; font-size: 14px; }
}