/* ============================================
   质量发展服务平台 - 前台样式
   风格：白色主色调 + 蓝色点缀，简洁现代
   ============================================ */

:root{
    --primary:#2563eb;
    --primary-dark:#1d4ed8;
    --primary-light:#3b82f6;
    --primary-bg:#eff6ff;
    --secondary:#0ea5e9;
    --text:#1e293b;
    --text-light:#64748b;
    --text-muted:#94a3b8;
    --bg:#f8fafc;
    --bg-white:#ffffff;
    --border:#e2e8f0;
    --shadow:0 1px 3px rgba(0,0,0,.08);
    --shadow-lg:0 4px 20px rgba(0,0,0,.08);
    --radius:8px;
    --radius-lg:12px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans SC","Hiragino Sans GB","WenQuanYi Micro Hei","Liberation Sans",sans-serif;font-size:15px;line-height:1.7;color:var(--text);background:var(--bg-white)}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
.container{max-width:1160px;margin:0 auto;padding:0 24px}
img{max-width:100%;height:auto}

/* ============================================
   顶部导航
   ============================================ */
.header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000}
.header-main .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:8px}
.logo a{display:flex;align-items:center;gap:8px;font-size:17px;font-weight:700;color:var(--text);letter-spacing:.5px}
.logo-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px}
.main-nav ul{display:flex;align-items:center;list-style:none;gap:4px}
.main-nav li>a{display:block;padding:8px 16px;color:var(--text-light);font-size:15px;border-radius:6px;transition:all .2s}
.main-nav li>a:hover{color:var(--primary);background:var(--primary-bg)}
.main-nav li.active>a,.main-nav li>a.active{color:var(--primary);font-weight:600;background:var(--primary-bg)}
.dropdown{position:relative}
.dropdown>a::after{content:' ▼';font-size:10px;color:var(--text-muted)}
.dropdown-menu{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);min-width:180px;padding:6px;z-index:100}
.dropdown:hover .dropdown-menu{display:block}
.dropdown-menu a{display:block;padding:8px 12px;color:var(--text-light);font-size:14px;border-radius:6px}
.dropdown-menu a:hover{color:var(--primary);background:var(--primary-bg)}
.header-search form{display:flex;align-items:center;background:var(--bg);border-radius:20px;padding:2px;border:1px solid var(--border)}
.header-search input{border:none;background:transparent;padding:6px 12px;font-size:13px;outline:none;width:160px;color:var(--text)}
.header-search button{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:6px 10px;font-size:13px}

/* ============================================
   Hero区域（首页主横幅）
   ============================================ */
.hero{background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);padding:80px 0 60px;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;background:var(--primary-bg);border:1px solid #dbeafe;border-radius:20px;font-size:13px;color:var(--primary);font-weight:500;margin-bottom:24px}
.hero h1{font-size:48px;font-weight:800;color:var(--text);margin-bottom:8px;letter-spacing:-1px;line-height:1.2}
.hero h1 span{color:var(--primary);background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:17px;color:var(--text-light);max-width:640px;margin:0 auto 36px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:var(--primary);color:#fff;border-radius:var(--radius);font-size:15px;font-weight:500;transition:all .2s;border:none;cursor:pointer}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.3);color:#fff}
.btn-outline{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:#fff;color:var(--text);border:1px solid var(--border);border-radius:var(--radius);font-size:15px;font-weight:500;transition:all .2s;cursor:pointer}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}

/* ============================================
   核心功能卡片
   ============================================ */
.features-section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:32px;font-weight:700;color:var(--text);margin-bottom:8px}
.section-title p{color:var(--text-light);font-size:15px}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;transition:all .3s}
.feature-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:transparent}
.feature-icon{width:48px;height:48px;border-radius:12px;background:var(--primary-bg);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:20px;color:var(--primary)}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:10px;color:var(--text)}
.feature-card p{font-size:14px;color:var(--text-light);line-height:1.7;margin-bottom:16px}
.feature-link{display:inline-flex;align-items:center;gap:4px;font-size:14px;font-weight:500;color:var(--primary)}
.feature-link:hover{color:var(--primary-dark)}
.feature-link::after{content:'>';transition:transform .2s}
.feature-link:hover::after{transform:translateX(4px)}

/* ============================================
   数据统计条
   ============================================ */
.stats-bar{background:var(--bg);padding:48px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-item .stat-number{font-size:36px;font-weight:800;color:var(--primary);line-height:1.2;margin-bottom:4px}
.stat-item .stat-label{font-size:14px;color:var(--text-light)}

/* ============================================
   相关机构
   ============================================ */
.orgs-section{padding:40px 0}
.orgs-section h3{font-size:18px;font-weight:600;margin-bottom:20px;color:var(--text)}
.orgs-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.org-card{display:flex;align-items:center;gap:12px;padding:16px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);transition:all .2s}
.org-card:hover{border-color:var(--primary);box-shadow:var(--shadow)}
.org-icon{width:40px;height:40px;border-radius:8px;background:var(--primary-bg);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--primary);flex-shrink:0}
.org-name{font-size:14px;font-weight:500;color:var(--text)}
.org-desc{font-size:12px;color:var(--text-muted)}

/* ============================================
   页脚
   ============================================ */
.footer-main{background:var(--bg);border-top:1px solid var(--border);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;margin-bottom:32px}
.footer-brand .footer-logo{display:flex;align-items:center;gap:8px;font-size:17px;font-weight:700;color:var(--text);margin-bottom:12px}
.footer-brand p{font-size:14px;color:var(--text-light);line-height:1.7}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text)}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{font-size:14px;color:var(--text-light)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;display:flex;justify-content:space-between;align-items:center}
.footer-bottom p{font-size:13px;color:var(--text-muted)}
.footer-bottom a{font-size:13px;color:var(--text-muted)}
.footer-bottom a:hover{color:var(--primary)}

/* ============================================
   证书查询页面
   ============================================ */
.cert-page-hero{background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);padding:60px 0;text-align:center}
.cert-page-hero h1{font-size:36px;font-weight:800;margin-bottom:12px;color:var(--text)}
.cert-page-hero p{color:var(--text-light);font-size:16px;max-width:560px;margin:0 auto}
.cert-features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:-30px auto 50px;max-width:900px;position:relative;z-index:2}
.cert-feature-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;text-align:center;transition:all .3s}
.cert-feature-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.cert-feature-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:26px}
.cert-feature-icon--1{background:#eff6ff;color:var(--primary)}
.cert-feature-icon--2{background:#f0fdf4;color:#16a34a}
.cert-feature-icon--3{background:#fffbeb;color:#d97706}
.cert-feature-card h4{font-size:17px;font-weight:600;margin-bottom:8px}
.cert-feature-card p{font-size:13px;color:var(--text-light)}
.cert-query-panel{max-width:720px;margin:0 auto 50px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow)}
.cert-query-header{text-align:center;margin-bottom:28px}
.cert-query-header h3{font-size:22px;font-weight:700;margin-bottom:6px;color:var(--text)}
.cert-query-header p{color:var(--text-light);font-size:14px}
.cert-query-fields{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:20px}
.cert-query-field label{display:flex;align-items:center;gap:6px;margin-bottom:8px;font-size:14px;font-weight:500;color:var(--text)}
.cert-query-field label .field-icon{font-size:16px}
.cert-query-field input{width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:14px;outline:none;transition:all .2s;background:#fff}
.cert-query-field input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.cert-query-captcha{margin-bottom:20px}
.cert-query-field--captcha{max-width:280px}
.captcha-input-row{display:flex;gap:12px;align-items:center}
.captcha-input-row input{flex:1}
.captcha-display{padding:10px 22px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;font-size:22px;font-weight:700;letter-spacing:8px;border-radius:var(--radius);cursor:pointer;user-select:none;font-family:monospace;white-space:nowrap;transition:all .2s}
.captcha-display:hover{transform:scale(1.03)}
.cert-query-actions{display:flex;justify-content:center;align-items:center;gap:12px}
.cert-query-btn{padding:12px 40px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;transition:all .2s}
.cert-query-btn:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.3)}
.cert-reset-btn{padding:12px 24px;background:var(--bg);color:var(--text-light);border:1px solid var(--border);border-radius:var(--radius);font-size:15px;cursor:pointer;transition:all .2s}
.cert-reset-btn:hover{background:#e2e8f0}
.cert-privacy-notice{padding:16px 20px;background:var(--bg);border-radius:var(--radius);margin-top:24px}
.cert-privacy-notice p:first-child{font-size:13px;color:var(--text);margin-bottom:4px}
.cert-privacy-notice p:first-child strong{color:var(--primary-dark)}
.cert-privacy-notice p:last-child{font-size:12px;color:var(--text-muted)}
.cert-search-tips{text-align:center;padding:50px 20px;color:var(--text-muted)}
.cert-tips-icon{font-size:48px;margin-bottom:15px}
.cert-search-tips>p{font-size:16px;margin-bottom:8px}
.cert-tips-hint{font-size:13px;color:var(--text-light)}
.cert-results{max-width:900px;margin:0 auto 60px}
.result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.cert-result-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;margin-bottom:16px;box-shadow:var(--shadow);border-left:4px solid var(--primary)}
.cert-result-card.valid{border-left-color:#16a34a}
.cert-result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.cert-result-header h4{font-size:18px;color:var(--text);font-weight:600}
.cert-status{padding:4px 14px;border-radius:20px;font-size:12px;font-weight:500}
.cert-status.valid{background:#f0fdf4;color:#16a34a}
.cert-status.invalid{background:#fef2f2;color:#dc2626}
.cert-info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.cert-info-item{display:flex;padding:8px 0;border-bottom:1px solid #f1f5f9;font-size:14px}
.cert-info-item .label{width:100px;color:var(--text-muted);flex-shrink:0}
.cert-info-item .value{flex:1;color:var(--text);font-weight:500}
.cert-training{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
.cert-training h5{font-size:14px;margin-bottom:8px;color:var(--primary-dark);font-weight:600}
.cert-training p{color:var(--text-light);font-size:14px;line-height:1.8}

/* ============================================
   文章列表
   ============================================ */
.page-header{background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);padding:50px 0 30px;text-align:center;margin-bottom:30px}
.page-header h1{font-size:32px;font-weight:800;margin-bottom:8px;color:var(--text)}
.page-header p{color:var(--text-light);font-size:15px}
.filter-bar{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap}
.filter-bar a{padding:8px 18px;background:#fff;border:1px solid var(--border);border-radius:20px;font-size:14px;color:var(--text-light);transition:all .2s}
.filter-bar a:hover,.filter-bar a.active{border-color:var(--primary);color:var(--primary);background:var(--primary-bg);font-weight:500}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:40px}
.article-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:all .3s}
.article-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.article-card .card-img{height:160px;background:linear-gradient(135deg,var(--primary-bg),#dbeafe);display:flex;align-items:center;justify-content:center;font-size:48px}
.article-card .card-body{padding:20px}
.article-card .card-cat{display:inline-block;padding:3px 10px;background:var(--primary-bg);color:var(--primary);border-radius:4px;font-size:12px;margin-bottom:10px;font-weight:500}
.article-card h3{font-size:16px;font-weight:600;margin-bottom:10px;line-height:1.5;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-card .card-desc{font-size:13px;color:var(--text-light);line-height:1.7;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-card .card-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text-muted)}

/* 卡片图片上的分类标签 */
.card-img-tag{position:absolute;top:10px;left:10px;padding:3px 10px;background:rgba(37,99,235,.85);color:#fff;border-radius:4px;font-size:11px;font-weight:500;z-index:2}

/* 卡片类型/难度标签 */
.card-tag{display:inline-block;padding:2px 10px;border-radius:4px;font-size:11px;font-weight:500}
.card-tag--type{background:var(--primary-bg);color:var(--primary)}
.card-tag--beginner{background:#f0fdf4;color:#16a34a}
.card-tag--intermediate{background:#fffbeb;color:#d97706}
.card-tag--advanced{background:#fef2f2;color:#dc2626}

/* 筛选标签 */
.filter-tags{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.filter-tags a{padding:8px 18px;background:#fff;border:1px solid var(--border);border-radius:20px;font-size:14px;color:var(--text-light);transition:all .2s;text-decoration:none}
.filter-tags a:hover,.filter-tags a.active{border-color:var(--primary);color:var(--primary);background:var(--primary-bg);font-weight:500}

/* 文章详情 */
.article-detail{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px;margin-bottom:30px}
.article-detail h1{font-size:28px;font-weight:700;margin-bottom:12px;color:var(--text);line-height:1.4}
.article-detail .article-subtitle{font-size:17px;color:var(--text-light);margin-bottom:20px;line-height:1.6}
.article-meta{display:flex;align-items:center;gap:16px;margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.article-meta span{display:flex;align-items:center;gap:4px}
.article-content{line-height:1.9;color:var(--text);font-size:15px}
.article-content h2{font-size:22px;font-weight:700;margin:28px 0 14px;color:var(--text);padding-bottom:8px;border-bottom:2px solid var(--primary-bg)}
.article-content h3{font-size:18px;font-weight:600;margin:22px 0 10px;color:var(--text)}
.article-content p{margin-bottom:14px}
.article-content ul,.article-content ol{margin-bottom:14px;padding-left:24px}
.article-content li{margin-bottom:6px}
.article-content strong{color:var(--primary-dark)}

/* 侧边栏 */
.sidebar-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:20px}
.sidebar-card h4{font-size:15px;font-weight:600;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--primary-bg);color:var(--text)}
.sidebar-list{list-style:none}
.sidebar-list li{margin-bottom:10px;padding-bottom:10px;border-bottom:1px solid #f8fafc}
.sidebar-list li:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.sidebar-list a{font-size:14px;color:var(--text);display:block;line-height:1.5}
.sidebar-list a:hover{color:var(--primary)}
.sidebar-list .meta{font-size:12px;color:var(--text-muted);margin-top:2px}

/* ============================================
   分页
   ============================================ */
.pagination{display:flex;justify-content:center;align-items:center;gap:6px;margin:30px 0}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 12px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;color:var(--text-light);transition:all .2s}
.pagination a:hover{border-color:var(--primary);color:var(--primary)}
.pagination span.current{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:500}

/* ============================================
   面包屑
   ============================================ */
.breadcrumb{padding:16px 0;font-size:13px;color:var(--text-muted)}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}

/* ============================================
   返回顶部
   ============================================ */
.back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:#fff;border:1px solid var(--border);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:all .3s;z-index:999;font-size:18px;color:var(--text-light)}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ============================================
   搜索页
   ============================================ */
.search-box{max-width:600px;margin:0 auto 40px}
.search-box form{display:flex;gap:10px}
.search-box input{flex:1;padding:14px 20px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:15px;outline:none;transition:all .2s}
.search-box input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.search-box button{padding:14px 28px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius);font-size:15px;font-weight:500;cursor:pointer}
.search-box button:hover{background:var(--primary-dark)}
.search-result-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:12px;transition:all .2s}
.search-result-item:hover{box-shadow:var(--shadow);border-color:var(--primary-bg)}
.search-result-item h3{font-size:16px;font-weight:600;margin-bottom:8px}
.search-result-item p{font-size:14px;color:var(--text-light);line-height:1.6}
.search-result-item .meta{font-size:12px;color:var(--text-muted);margin-top:8px}

/* ============================================
   文章列表页
   ============================================ */
.article-list-page{padding:30px 0 50px}
.filter-tags{display:flex;gap:8px;margin-bottom:28px;flex-wrap:wrap}
.filter-tags a{padding:8px 18px;background:#fff;border:1px solid var(--border);border-radius:20px;font-size:14px;color:var(--text-light);transition:all .2s}
.filter-tags a:hover,.filter-tags a.active{border-color:var(--primary);color:var(--primary);background:var(--primary-bg);font-weight:500}
.article-list-page .article-card{display:flex;gap:20px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin-bottom:16px;transition:all .3s}
.article-list-page .article-card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary-bg)}
.article-list-page .article-card .card-image{width:200px;height:140px;border-radius:var(--radius);overflow:hidden;flex-shrink:0;background:linear-gradient(135deg,var(--primary-bg),#dbeafe);display:flex;align-items:center;justify-content:center;font-size:40px}
.article-list-page .article-card .card-image img{width:100%;height:100%;object-fit:cover}
.article-list-page .article-card .card-body{flex:1}
.article-list-page .card-title{font-size:18px;font-weight:600;margin-bottom:10px;line-height:1.5}
.article-list-page .card-title a{color:var(--text)}
.article-list-page .card-title a:hover{color:var(--primary)}
.article-list-page .card-desc{font-size:14px;color:var(--text-light);line-height:1.7;margin-bottom:12px}
.article-list-page .card-footer{display:flex;gap:16px;font-size:12px;color:var(--text-muted);flex-wrap:wrap}

/* ============================================
   响应式
   ============================================ */
@media(max-width:768px){
    .header-main .container{flex-wrap:wrap;height:auto;padding:12px 16px}
    .main-nav{display:none}
    .header-search{width:100%;margin-top:10px}
    .header-search input{width:100%}
    .hero{padding:50px 0 40px}
    .hero h1{font-size:32px}
    .hero-desc{font-size:15px}
    .hero-btns{flex-direction:column;align-items:center}
    .features-grid,.article-grid,.stats-grid,.orgs-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr;gap:24px}
    .cert-query-fields{grid-template-columns:1fr}
    .cert-features{grid-template-columns:1fr;margin-top:20px}
    .cert-query-panel{padding:24px}
    .article-grid{grid-template-columns:1fr}
    .feature-card{padding:24px}
}