/* ============================================
   咿呀启蒙 - 主样式表
   主色调: #1d4ed8 (蓝色)
   圆角: 12px
   ============================================ */

/* CSS变量 */
:root {
    --primary: #1d4ed8;
    --primary-light: rgba(29, 78, 216, 0.1);
    --primary-lighter: rgba(29, 78, 216, 0.03);
    --radius: 12px;
    --text: #333;
    --text-light: #666;
    --text-lighter: #999;
    --bg: #f5f6f8;
    --bg-white: #fff;
    --border: #e5e7eb;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.12);
    --header-height: 64px;
    --max-width: 1250px;
}

/* 全局重置 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    color:var(--text);
    background:var(--bg);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
}
/* 内页浅色背景图 */
body.category-page,
body.detail-page,
body.collection-page,
body.search-page{
    background-image:url('/upload/image/bg-light.png');
    background-repeat:repeat;
    background-attachment:fixed;
}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:#1740b5}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* 布局 */
.wrapper{width:var(--max-width);max-width:100%;margin:0 auto;padding:0 20px}
.section{padding:32px 0}
.mg-b{margin-bottom:0!important}
.mobile-hidden{display:block}
.hidden{display:none!important}

/* ============================================
   头部
   ============================================ */
.header{
    background:var(--bg-white);
    box-shadow:var(--shadow);
    position:sticky;
    top:0;
    z-index:100;
}
.header-inner{
    display:flex;
    align-items:center;
    height:var(--header-height);
    gap:20px;
}
.header-logo{flex-shrink:0}
.logo-text{
    font-size:22px;
    font-weight:700;
    color:var(--primary);
    white-space:nowrap;
}
.logo-img{height:40px;width:auto}
.header-search{flex:1;max-width:500px}
.search-form{
    display:flex;
    border:2px solid var(--primary);
    border-radius:var(--radius);
    overflow:hidden;
}
.search-input{
    flex:1;
    border:none;
    padding:8px 16px;
    font-size:14px;
    outline:none;
    background:transparent;
}
.search-btn{
    background:var(--primary);
    color:#fff;
    border:none;
    padding:0 24px;
    cursor:pointer;
    font-size:14px;
    font-weight:500;
    transition:background .2s;
}
.search-btn:hover{background:#1740b5}
.header-tags{
    display:flex;
    gap:8px;
    flex-shrink:0;
}
.hot-tag{
    font-size:12px;
    color:var(--text-light);
    padding:4px 10px;
    background:var(--primary-light);
    border-radius:20px;
    transition:all .2s;
}
.hot-tag:hover{background:var(--primary);color:#fff}
.header-wechat{flex-shrink:0}
.btn-wechat{
    display:flex;
    align-items:center;
    gap:6px;
    background:var(--primary);
    color:#fff;
    border:none;
    padding:8px 16px;
    border-radius:var(--radius);
    cursor:pointer;
    font-size:14px;
    font-weight:500;
    transition:all .2s;
}
.btn-wechat:hover{background:#1740b5;box-shadow:var(--shadow-hover)}
.mobile-menu-toggle{
    display:none;
    flex-direction:column;
    justify-content:space-around;
    width:28px;
    height:24px;
    background:none;
    border:none;
    cursor:pointer;
}
.mobile-menu-toggle span{
    display:block;
    width:100%;
    height:3px;
    background:var(--text);
    border-radius:2px;
    transition:all .3s;
}

/* ============================================
   导航栏
   ============================================ */
.main-nav{
    background:var(--bg-white);
    border-bottom:1px solid var(--border);
}
.nav-list{
    display:flex;
    gap:4px;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
}
.nav-list::-webkit-scrollbar{display:none}
.nav-link{
    display:block;
    padding:12px 16px;
    color:var(--text);
    font-size:15px;
    white-space:nowrap;
    border-radius:var(--radius);
    transition:all .2s;
}
.nav-link:hover{
    color:var(--primary);
    background:var(--primary-light);
}

/* ============================================
   首页 Hero 区域
   ============================================ */
.hero-section{
    background:linear-gradient(135deg,#f0f9ff 0%,#fff8f0 50%,#fff 100%);
    padding:50px 0 40px;
}
.hero-inner{
    display:grid;
    grid-template-columns:1.2fr 0.8fr;
    gap:40px;
    align-items:center;
}
.hero-left{max-width:640px}
.hero-title{
    font-size:36px;
    font-weight:800;
    line-height:1.25;
    color:#1f2937;
    margin-bottom:16px;
}
.hero-highlight{color:var(--primary)}
.hero-subtitle{
    font-size:16px;
    color:var(--text-light);
    margin-bottom:28px;
}
.hero-search{
    display:flex;
    align-items:center;
    background:#fff;
    border:2px solid var(--border);
    border-radius:var(--radius);
    padding:4px;
    box-shadow:var(--shadow);
    margin-bottom:16px;
    transition:all .2s;
}
.hero-search:focus-within{
    border-color:var(--primary);
    box-shadow:0 4px 12px rgba(29,78,216,.12);
}
.hero-search-icon{
    color:var(--text-lighter);
    margin:0 12px;
    flex-shrink:0;
}
.hero-search-input{
    flex:1;
    border:none;
    background:transparent;
    padding:12px 8px;
    font-size:15px;
    outline:none;
    color:var(--text);
}
.hero-search-input::placeholder{color:#9ca3af}
.hero-search-btn{
    background:var(--primary);
    color:#fff;
    border:none;
    padding:12px 28px;
    border-radius:10px;
    font-size:15px;
    font-weight:600;
    cursor:pointer;
    transition:all .2s;
}
.hero-search-btn:hover{background:#1740b5}
.hero-tags{
    display:flex;
    align-items:center;
    gap:10px;
    flex-wrap:wrap;
    font-size:13px;
    color:var(--text-light);
}
.hero-tags a{
    display:inline-block;
    padding:4px 12px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:20px;
    color:var(--text-light);
    font-size:13px;
    transition:all .2s;
}
.hero-tags a:hover{
    border-color:var(--primary);
    color:var(--primary);
    background:var(--primary-light);
}
.hero-right{display:flex;justify-content:flex-end}
.hero-card{
    background:linear-gradient(135deg,#ff7a45 0%,#ff4d4f 100%);
    border-radius:var(--radius);
    padding:28px;
    color:#fff;
    width:100%;
    max-width:320px;
    box-shadow:0 10px 30px rgba(255,77,79,.25);
    position:relative;
    overflow:hidden;
}
.hero-card::before{
    content:'';
    position:absolute;
    top:-40px;
    right:-40px;
    width:120px;
    height:120px;
    background:rgba(255,255,255,.12);
    border-radius:50%;
}
.hero-card-badge{
    display:inline-block;
    background:rgba(255,255,255,.2);
    padding:4px 12px;
    border-radius:20px;
    font-size:12px;
    font-weight:600;
    margin-bottom:14px;
}
.hero-card-title{font-size:22px;font-weight:700;margin-bottom:18px}
.hero-card-list{list-style:none;margin-bottom:24px}
.hero-card-list li{
    display:flex;
    align-items:center;
    gap:8px;
    margin-bottom:10px;
    font-size:14px;
    opacity:.95;
}
.hero-card-list li svg{flex-shrink:0;opacity:.9}
.hero-card-btn{
    display:flex;
    align-items:center;
    justify-content:center;
    gap:6px;
    width:100%;
    background:#fff;
    color:#ff4d4f;
    border:none;
    padding:12px;
    border-radius:var(--radius);
    font-size:15px;
    font-weight:700;
    cursor:pointer;
    transition:all .2s;
}
.hero-card-btn:hover{
    background:#fff5f5;
    transform:translateY(-1px);
    box-shadow:0 4px 12px rgba(0,0,0,.1);
}

/* ============================================
   微信引导横幅
   ============================================ */
.wechat-banner{
    background:linear-gradient(135deg,#ffdddd 0%,#ffe8e8 50%,#fff5f5 100%);
    padding:18px 0;
    color:#9b2c2c;
    border-top:1px solid rgba(255,180,180,.4);
    border-bottom:1px solid rgba(255,180,180,.4);
}
.banner-content{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
}
.banner-title{font-size:19px;font-weight:700;margin-bottom:4px}
.banner-subtitle{font-size:14px;opacity:.85}
.banner-btn{
    display:flex;
    align-items:center;
    gap:6px;
    background:#fff;
    color:#e11d48;
    border:none;
    padding:10px 24px;
    border-radius:var(--radius);
    cursor:pointer;
    font-size:15px;
    font-weight:600;
    white-space:nowrap;
    transition:all .2s;
    box-shadow:0 2px 8px rgba(225,29,72,.12);
}
.banner-btn:hover{box-shadow:0 4px 14px rgba(225,29,72,.2);transform:translateY(-1px)}

/* ============================================
   四大学习阶段
   ============================================ */
.section-title.text-center{text-align:center}
.section-title.text-center h2{margin:0 auto}
.age-stage-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
}
.age-stage-card{
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:16px;
    background:var(--bg-white);
    border-radius:var(--radius);
    padding:24px;
    box-shadow:var(--shadow);
    transition:all .3s;
    border:1px solid var(--border);
}
.age-stage-card:hover{
    box-shadow:var(--shadow-hover);
    transform:translateY(-2px);
    border-color:transparent;
}
.age-stage-icon{
    width:56px;
    height:56px;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    flex-shrink:0;
}
.age-stage-icon svg{display:block}
.age-stage-info h3{font-size:18px;font-weight:700;margin-bottom:4px;color:var(--text-dark)}
.age-stage-age{font-size:13px;color:var(--text-light);display:block;margin-bottom:6px}
.age-stage-subtitle{font-size:13px;color:var(--text);margin:0 0 12px;min-height:20px}
.age-stage-tags{display:flex;flex-wrap:wrap;gap:8px}
.age-stage-tag{
    display:inline-block;
    font-size:12px;
    color:var(--text-light);
    background:var(--bg);
    padding:4px 10px;
    border-radius:20px;
    border:1px solid var(--border);
}

/* ============================================
   学习路线专题页
   ============================================ */
.xuexiluxian-hero{padding-bottom:0}
.xuexiluxian-title{
    font-size:32px;
    font-weight:700;
    color:var(--text-dark);
    margin-bottom:12px;
}
.xuexiluxian-desc{
    font-size:16px;
    color:var(--text-light);
    max-width:640px;
    margin:0 auto;
}
.text-center{text-align:center}

/* ============================================
   精选专题合集
   ============================================ */
.collection-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
    gap:16px;
}
.collection-card{
    background:var(--bg-white);
    border-radius:var(--radius);
    overflow:hidden;
    box-shadow:var(--shadow);
    transition:all .3s;
}
.collection-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.collection-cover{
    width:100%;
    height:140px;
    object-fit:cover;
}
.collection-info{padding:16px}
.collection-issue{
    display:inline-block;
    font-size:12px;
    color:var(--primary);
    background:var(--primary-light);
    padding:2px 8px;
    border-radius:4px;
    margin-bottom:6px;
}
.collection-info h3{font-size:15px;font-weight:600;margin-bottom:4px}
.collection-info p{font-size:13px;color:var(--text-light)}

/* ============================================
   资源分类网格
   ============================================ */
.category-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(100px,1fr));
    gap:12px;
}
.category-card{
    display:flex;
    align-items:center;
    justify-content:center;
    padding:16px 8px;
    background:var(--bg-white);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    font-size:14px;
    font-weight:500;
    color:var(--text);
    transition:all .2s;
    text-align:center;
}
.category-card:hover{
    background:var(--primary);
    color:#fff;
    transform:translateY(-2px);
}
.category-name{white-space:nowrap}

/* ============================================
   标题
   ============================================ */
.section-title{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin-bottom:20px;
}
.section-title h2{
    font-size:22px;
    font-weight:700;
    color:var(--text);
    position:relative;
    padding-left:12px;
}
.section-title h2::before{
    content:'';
    position:absolute;
    left:0;
    top:50%;
    transform:translateY(-50%);
    width:4px;
    height:20px;
    background:var(--primary);
    border-radius:2px;
}
.more-link{
    font-size:14px;
    color:var(--primary);
    font-weight:500;
}
.resource-count{font-size:14px;color:var(--text-lighter)}

/* ============================================
   资源卡片网格
   ============================================ */
.resource-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
    gap:16px;
}
.resource-card{
    background:var(--bg-white);
    border-radius:var(--radius);
    overflow:hidden;
    box-shadow:var(--shadow);
    transition:all .3s;
    display:flex;
    flex-direction:column;
}
.resource-card:hover{
    box-shadow:var(--shadow-hover);
    transform:translateY(-4px);
}
.resource-cover{
    width:100%;
    aspect-ratio:3/4;
    overflow:hidden;
    background:var(--primary-lighter);
    position:relative;
}
.resource-cover img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .3s;
}
.resource-card:hover .resource-cover img{transform:scale(1.05)}
.resource-info{
    padding:12px;
    flex:1;
    display:flex;
    flex-direction:column;
    gap:4px;
}
.resource-title{
    font-size:14px;
    font-weight:600;
    line-height:1.4;
    color:var(--text);
    overflow:hidden;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
}
.resource-summary{
    font-size:12px;
    color:var(--text-light);
    line-height:1.5;
    overflow:hidden;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
}
.resource-meta{
    display:flex;
    gap:6px;
    flex-wrap:wrap;
    margin-top:auto;
}
.meta-tag{
    font-size:11px;
    color:var(--text-lighter);
    background:var(--bg);
    padding:2px 6px;
    border-radius:4px;
}

/* ============================================
   面包屑
   ============================================ */
.breadcrumb{
    background:var(--bg-white);
    padding:12px 0;
    font-size:13px;
    color:var(--text-light);
    border-bottom:1px solid var(--border);
}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .separator{margin:0 8px;color:var(--text-lighter)}
.breadcrumb .current{color:var(--text)}

/* ============================================
   详情页
   ============================================ */
.detail-section{padding:24px 0}
.detail-layout{
    display:grid;
    grid-template-columns:1fr 300px;
    gap:24px;
}
.detail-main{background:var(--bg-white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.detail-header{
    display:flex;
    gap:24px;
    margin-bottom:24px;
    padding-bottom:24px;
    border-bottom:1px solid var(--border);
}
.detail-cover{
    width:200px;
    flex-shrink:0;
    border-radius:var(--radius);
    overflow:hidden;
    box-shadow:var(--shadow);
}
.detail-cover img{width:100%;height:auto}
.detail-info{flex:1}
.detail-title{
    font-size:24px;
    font-weight:700;
    line-height:1.4;
    margin-bottom:16px;
    color:var(--text);
}
.detail-meta{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:8px;
    margin-bottom:16px;
}
.meta-item{
    font-size:14px;
    color:var(--text-light);
}
.meta-label{color:var(--text-lighter)}
.detail-summary{
    background:var(--primary-light);
    padding:12px 16px;
    border-radius:var(--radius);
    font-size:14px;
    color:var(--text-light);
    line-height:1.6;
    margin-bottom:16px;
}

/* 下载引导 */
.download-guide{
    display:flex;
    align-items:center;
    gap:16px;
    background:linear-gradient(135deg,var(--primary-light),rgba(59,130,246,0.15));
    border:2px solid var(--primary);
    border-radius:var(--radius);
    padding:16px 20px;
    margin-top:16px;
}
.download-guide-icon{flex-shrink:0}
.download-guide-text{flex:1}
.download-guide-text h3{font-size:16px;font-weight:600;margin-bottom:4px;color:var(--primary)}
.download-guide-text p{font-size:13px;color:var(--text-light)}
.download-guide-text strong{color:var(--primary)}
.btn-download-wechat{
    background:var(--primary);
    color:#fff;
    border:none;
    padding:12px 28px;
    border-radius:var(--radius);
    cursor:pointer;
    font-size:15px;
    font-weight:600;
    white-space:nowrap;
    transition:all .2s;
}
.btn-download-wechat:hover{background:#1740b5;box-shadow:var(--shadow-hover)}

/* 正文内容 */
.detail-content{
    font-size:15px;
    line-height:1.8;
    color:var(--text);
}
.detail-content h2{font-size:20px;font-weight:600;margin:24px 0 12px}
.detail-content h3{font-size:17px;font-weight:600;margin:20px 0 10px}
.detail-content p{margin-bottom:12px}
.detail-content ul,.detail-content ol{margin:12px 0 12px 24px}
.detail-content li{margin-bottom:6px}
.detail-content img{max-width:100%;border-radius:8px;margin:12px 0}
.detail-content strong{font-weight:600;color:var(--text)}
.detail-content blockquote{
    border-left:4px solid var(--primary);
    padding:8px 16px;
    margin:12px 0;
    background:var(--primary-lighter);
    border-radius:0 8px 8px 0;
    color:var(--text-light);
}

/* 标签 */
.detail-tags{
    display:flex;
    gap:8px;
    flex-wrap:wrap;
    margin-top:24px;
    padding-top:24px;
    border-top:1px solid var(--border);
}
.tag{
    font-size:13px;
    color:var(--text-light);
    background:var(--bg);
    padding:4px 12px;
    border-radius:20px;
    transition:all .2s;
}
.tag:hover{background:var(--primary);color:#fff}

/* 相关推荐 */
.related-section{margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.related-title{font-size:18px;font-weight:600;margin-bottom:16px}
.related-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(180px,1fr));
    gap:12px;
}
.related-card{
    display:flex;
    flex-direction:column;
    background:var(--bg);
    border-radius:var(--radius);
    overflow:hidden;
    transition:all .3s;
}
.related-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.related-cover{
    width:100%;
    aspect-ratio:3/4;
    overflow:hidden;
}
.related-cover img{width:100%;height:100%;object-fit:cover}
.related-info{padding:8px 10px}
.related-info h3{font-size:13px;font-weight:500;line-height:1.4;margin-bottom:2px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.related-info p{font-size:11px;color:var(--text-lighter);overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}

/* 侧边栏 */
.detail-sidebar{
    display:flex;
    flex-direction:column;
    gap:16px;
}
.sidebar-wechat-card{
    background:var(--bg-white);
    border-radius:var(--radius);
    padding:20px;
    text-align:center;
    box-shadow:var(--shadow);
    border:2px solid var(--primary);
}
.sidebar-wechat-card h3{font-size:16px;font-weight:600;margin-bottom:8px;color:var(--primary)}
.sidebar-wechat-card>p{font-size:13px;color:var(--text-light);margin-bottom:12px}
.sidebar-qr{
    width:200px;
    height:200px;
    margin:0 auto 12px;
    border-radius:8px;
}
.sidebar-qr-placeholder{
    width:200px;
    height:200px;
    margin:0 auto 12px;
    border:2px dashed var(--border);
    border-radius:8px;
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--text-lighter);
    font-size:13px;
}
.sidebar-wechat-id{font-size:13px;color:var(--text-light);margin-top:8px}
.sidebar-widget{
    background:var(--bg-white);
    border-radius:var(--radius);
    padding:16px;
    box-shadow:var(--shadow);
}
.widget-title{
    font-size:16px;
    font-weight:600;
    margin-bottom:12px;
    padding-bottom:8px;
    border-bottom:1px solid var(--border);
}
.sidebar-list{display:flex;flex-direction:column;gap:10px}
.sidebar-item{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:13px;
}
.sidebar-item a{color:var(--text);overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;flex:1}
.sidebar-item a:hover{color:var(--primary)}
.sidebar-rank{
    width:20px;
    height:20px;
    flex-shrink:0;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:12px;
    font-weight:700;
    color:var(--text-lighter);
    background:var(--bg);
    border-radius:4px;
}
.sidebar-item:nth-child(-n+3) .sidebar-rank{background:var(--primary);color:#fff}

/* ============================================
   分页
   ============================================ */
.pagination{
    display:flex;
    justify-content:center;
    align-items:center;
    gap:4px;
    margin-top:32px;
    flex-wrap:wrap;
}
.page-link{
    display:inline-block;
    min-width:36px;
    height:36px;
    line-height:36px;
    text-align:center;
    padding:0 8px;
    background:var(--bg-white);
    border-radius:8px;
    color:var(--text);
    font-size:14px;
    box-shadow:var(--shadow);
    transition:all .2s;
}
.page-link:hover{background:var(--primary);color:#fff}
.page-link.active{background:var(--primary);color:#fff}
.page-ellipsis{color:var(--text-lighter);padding:0 4px}

/* ============================================
   CTA
   ============================================ */
.cta-section{padding:40px 0}
.cta-box{
    background:linear-gradient(135deg,#1d4ed8 0%,#3b82f6 100%);
    border-radius:var(--radius);
    padding:32px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    color:#fff;
    box-shadow:var(--shadow);
}
.cta-text h2{font-size:22px;font-weight:700;margin-bottom:4px}
.cta-text p{font-size:14px;opacity:.9}
.cta-btn{
    display:flex;
    align-items:center;
    gap:6px;
    background:#fff;
    color:var(--primary);
    border:none;
    padding:12px 28px;
    border-radius:var(--radius);
    cursor:pointer;
    font-size:15px;
    font-weight:600;
    white-space:nowrap;
    transition:all .2s;
}
.cta-btn:hover{box-shadow:var(--shadow-hover);transform:translateY(-1px)}

/* ============================================
   空状态
   ============================================ */
.empty-state{
    text-align:center;
    padding:60px 20px;
    color:var(--text-lighter);
}
.empty-state p{font-size:16px;margin-bottom:8px}

/* ============================================
   微信弹窗
   ============================================ */
.modal-overlay{
    display:none;
    position:fixed;
    top:0;left:0;
    width:100%;height:100%;
    background:rgba(0,0,0,0.6);
    z-index:9999;
    align-items:center;
    justify-content:center;
}
.modal-overlay.show{display:flex}
.modal-content{
    background:#fff;
    border-radius:var(--radius);
    padding:32px;
    max-width:380px;
    width:90%;
    position:relative;
    text-align:center;
    animation:modalIn .3s ease;
}
@keyframes modalIn{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}
.modal-close{
    position:absolute;
    top:12px;
    right:16px;
    background:none;
    border:none;
    font-size:28px;
    cursor:pointer;
    color:var(--text-lighter);
    line-height:1;
}
.modal-title{font-size:18px;font-weight:600;margin-bottom:16px;color:var(--text)}
.qr-code-box{margin:0 auto 16px;width:220px;height:220px}
.qr-code-img{width:100%;height:100%;object-fit:contain;border-radius:8px}
.qr-placeholder{
    width:100%;height:100%;
    border:2px dashed var(--border);
    border-radius:8px;
    display:flex;align-items:center;justify-content:center;
    color:var(--text-lighter);font-size:14px;
}
.weixin-id{font-size:15px;margin-bottom:8px;color:var(--text)}
.modal-desc{font-size:13px;color:var(--text-light)}

/* ============================================
   页脚
   ============================================ */
.footer{background:#1e293b;color:#94a3b8}
.footer-top{padding:40px 0}
.footer-columns{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1fr;
    gap:32px;
}
.footer-logo{margin-bottom:12px}
.footer-logo .logo-text{color:#fff;font-size:20px}
.footer-desc{font-size:14px;line-height:1.6;color:#94a3b8}
.footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:12px}
.footer-links li{margin-bottom:8px}
.footer-links a{color:#94a3b8;font-size:14px}
.footer-links a:hover{color:#fff}
.footer-qr{text-align:center}
.footer-weixin{display:flex;flex-direction:column;align-items:center;gap:8px}
.footer-qr-img{width:120px;height:120px;border-radius:8px}
.footer-qr-placeholder{
    width:120px;height:120px;
    border:2px dashed #475569;
    border-radius:8px;
    display:flex;align-items:center;justify-content:center;
    color:#64748b;font-size:12px;
}
.footer-weixin p{font-size:13px}
.footer-bottom{border-top:1px solid #334155;padding:16px 0}
.footer-bottom .wrapper{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.footer-bottom p{font-size:13px;color:#64748b}
.footer-bottom a{color:#64748b}
.footer-bottom-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.friend-links-title{font-size:13px;color:#64748b}
.friend-link{color:#94a3b8;font-size:13px}

/* ============================================
   合集页
   ============================================ */
.collection-header{
    display:flex;
    gap:24px;
    background:var(--bg-white);
    border-radius:var(--radius);
    padding:24px;
    margin-bottom:24px;
    box-shadow:var(--shadow);
}
.collection-cover{width:240px;flex-shrink:0;border-radius:var(--radius);overflow:hidden}
.collection-cover img{width:100%;height:auto}
.collection-header-info{flex:1}
.collection-issue-badge{
    display:inline-block;
    font-size:13px;
    color:#fff;
    background:var(--primary);
    padding:2px 10px;
    border-radius:4px;
    margin-bottom:8px;
}
.collection-title{font-size:24px;font-weight:700;margin-bottom:8px;color:var(--text)}
.collection-desc{font-size:14px;color:var(--text-light);line-height:1.6;margin-bottom:12px}

/* ============================================
   响应式 - 平板
   ============================================ */
@media (max-width:1024px){
    .detail-layout{grid-template-columns:1fr}
    .detail-sidebar{flex-direction:row;flex-wrap:wrap}
    .sidebar-wechat-card,.sidebar-widget{flex:1;min-width:280px}
    .footer-columns{grid-template-columns:1fr 1fr}
    .hero-inner{grid-template-columns:1fr;gap:32px}
    .hero-right{justify-content:center}
    .hero-card{max-width:360px}
}

/* ============================================
   响应式 - 手机
   ============================================ */
@media (max-width:768px){
    .mobile-hidden{display:none!important}
    .header-inner{flex-wrap:wrap;height:auto;padding:12px 20px;gap:10px}
    .header-logo{order:1}
    .mobile-menu-toggle{display:flex;order:2;margin-left:auto}
    .header-search{order:3;width:100%;max-width:100%;flex-basis:100%}
    .header-wechat{order:4}
    .header-tags{display:none}

    .nav-list{padding:8px 20px}

    .hero-section{padding:32px 0 28px}
    .hero-inner{grid-template-columns:1fr;gap:28px}
    .hero-left{text-align:center;max-width:100%}
    .hero-title{font-size:26px}
    .hero-subtitle{font-size:14px;margin-bottom:20px}
    .hero-search{flex-wrap:wrap}
    .hero-search-input{width:100%;padding:10px 8px}
    .hero-search-btn{width:100%;margin-top:4px}
    .hero-tags{justify-content:center}
    .hero-right{justify-content:center}
    .hero-card{max-width:100%}

    .banner-content{flex-direction:column;text-align:center;gap:12px}
    .banner-btn{width:100%;justify-content:center}

    .age-stage-grid{grid-template-columns:1fr 1fr}
    .age-stage-card{padding:16px}
    .age-stage-icon{width:48px;height:48px}
    .age-stage-info h3{font-size:15px}
    .age-stage-age{font-size:12px}
    .age-stage-subtitle{font-size:12px}
    .age-stage-tag{font-size:11px;padding:3px 8px}

    .collection-grid{grid-template-columns:1fr}

    .category-grid{grid-template-columns:repeat(3,1fr)}
    .category-card{padding:12px 4px;font-size:13px}

    .resource-grid{grid-template-columns:repeat(2,1fr);gap:10px}
    .resource-info{padding:8px}
    .resource-title{font-size:13px}
    .resource-summary{font-size:11px}

    .section{padding:20px 0}
    .section-title h2{font-size:18px}

    .detail-main{padding:16px}
    .detail-header{flex-direction:column;gap:16px;padding-bottom:16px}
    .detail-cover{width:100%;max-width:200px;margin:0 auto}
    .detail-title{font-size:18px}
    .detail-meta{grid-template-columns:1fr}

    .download-guide{flex-direction:column;text-align:center;padding:16px}
    .btn-download-wechat{width:100%}

    .related-grid{grid-template-columns:1fr 1fr}

    .sidebar-wechat-card,.sidebar-widget{flex:1 1 100%}

    .cta-box{flex-direction:column;text-align:center;padding:24px 16px}
    .cta-btn{width:100%;justify-content:center}

    .footer-columns{grid-template-columns:1fr 1fr;gap:20px}
    .footer-about{grid-column:1/-1}
    .footer-bottom .wrapper{flex-direction:column;text-align:center}

    .collection-header{flex-direction:column}
    .collection-cover{width:100%;max-width:240px;margin:0 auto}

    .modal-content{padding:24px 16px}
    .qr-code-box{width:180px;height:180px}

    .xuexiluxian-title{font-size:24px}
    .xuexiluxian-desc{font-size:14px}
}

@media (max-width:480px){
    .resource-grid{grid-template-columns:1fr 1fr}
    .category-grid{grid-template-columns:repeat(2,1fr)}
    .age-stage-grid{grid-template-columns:1fr}
}

/* ============ 标签栏 ============ */
.tag-bar{
    background:#f8f9fa;
    border-bottom:1px solid #e8e8e8;
    padding:8px 0;
    overflow:hidden;
}
.tag-bar .wrapper{
    display:flex;
    align-items:center;
    gap:8px;
}
.tag-bar-label{
    font-size:13px;
    color:#999;
    white-space:nowrap;
    flex-shrink:0;
}
.tag-bar-list{
    display:flex;
    gap:6px;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
}
.tag-bar-list::-webkit-scrollbar{display:none}
.tag-bar-item{
    display:inline-block;
    padding:3px 12px;
    font-size:13px;
    color:#555;
    background:#fff;
    border:1px solid #e0e0e0;
    border-radius:14px;
    white-space:nowrap;
    transition:all .2s;
    text-decoration:none;
}
.tag-bar-item:hover{
    color:#fff;
    background:#1d4ed8;
    border-color:#1d4ed8;
}

/* ============ 标签云 ============ */
.tag-cloud-section{
    padding:32px 0;
}
.tag-cloud{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
}
.tag-cloud-item{
    display:inline-block;
    padding:6px 18px;
    font-size:14px;
    color:#333;
    background:#f0f5ff;
    border:1px solid #d6e4ff;
    border-radius:20px;
    text-decoration:none;
    transition:all .2s;
}
.tag-cloud-item:hover{
    color:#fff;
    background:#1d4ed8;
    border-color:#1d4ed8;
    transform:translateY(-2px);
    box-shadow:0 4px 12px rgba(29,78,216,.2);
}

/* ============ 专题页内容 ============ */
.page-section{
    padding:32px 0;
}
.page-content{
    max-width:900px;
    margin:0 auto;
    line-height:1.8;
    font-size:16px;
}
.page-content h1{font-size:28px;margin-bottom:16px}
.page-content p{margin-bottom:16px;color:#555}
.page-content h2{font-size:22px;margin:24px 0 12px}

/* ============ 搜索热门标签 ============ */
.header-tags .hot-tag{
    display:inline-block;
    padding:2px 10px;
    font-size:12px;
    color:#1d4ed8;
    background:#e8f0fe;
    border-radius:10px;
    text-decoration:none;
    margin-left:6px;
    transition:all .2s;
}
.header-tags .hot-tag:hover{
    background:#1d4ed8;
    color:#fff;
}

/* ============================================================
   首页改造样式  [2026-09-09]
   对应本次 index.php 修改：学习路线卡片、资源标签网格
   ============================================================ */

/* --- 学习路线区块标题：增大、去竖线 --- */
.age-stages-title h2{
    padding-left:0;
    font-size:30px;
    font-weight:800;
    letter-spacing:-.5px;
}
.age-stages-title h2::before{display:none}

/* --- 学习路线卡片：整体居中、上下布局、图标放大扁平化 --- */
.age-stage-grid{
    grid-template-columns:repeat(4,1fr);
    gap:24px;
}
.age-stage-card{
    flex-direction:column;
    align-items:center;
    text-align:center;
    padding:28px 22px;
    border:1px solid var(--border);
    cursor:default;
}
.age-stage-icon{
    width:76px;
    height:76px;
    border-radius:20px;
    margin-bottom:16px;
}
.age-stage-icon svg{
    width:40px;
    height:40px;
}
.age-stage-info h3{
    font-size:20px;
    font-weight:700;
    margin-bottom:6px;
    color:var(--text);
}
.age-stage-age{
    font-size:14px;
    margin-bottom:14px;
}
.age-stage-tags{
    justify-content:center;
    gap:8px;
}
.age-stage-tag{
    display:inline-block;
    font-size:13px;
    padding:5px 12px;
    border-radius:20px;
    background:#fff;
    border:1px solid var(--border);
    color:var(--text-light);
    transition:all .2s;
}
.age-stage-tag:hover{
    background:var(--primary);
    border-color:var(--primary);
    color:#fff;
}

/* --- 资源标签：卡片网格 --- */
.tag-category-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
    gap:16px;
}
.tag-category-card{
    display:flex;
    align-items:center;
    gap:14px;
    background:var(--bg-white);
    border:1px solid var(--border);
    border-radius:var(--radius);
    padding:14px 16px;
    box-shadow:var(--shadow);
    transition:all .25s;
}
.tag-category-card:hover{
    transform:translateY(-3px);
    box-shadow:var(--shadow-hover);
    border-color:rgba(29,78,216,.2);
}
.tag-cat-icon{
    width:52px;
    height:52px;
    border-radius:14px;
    display:flex;
    align-items:center;
    justify-content:center;
    flex-shrink:0;
}
.tag-cat-icon svg{
    width:32px;
    height:32px;
    display:block;
}
.tag-cat-info h3{
    font-size:15px;
    font-weight:700;
    color:var(--text);
    margin-bottom:2px;
}
.tag-cat-info p{
    font-size:12px;
    color:var(--text-light);
    line-height:1.4;
    overflow:hidden;
    display:-webkit-box;
    -webkit-line-clamp:1;
    -webkit-box-orient:vertical;
}

/* --- 响应式 --- */
@media (max-width:992px){
    .age-stage-grid{grid-template-columns:repeat(2,1fr)}
    .tag-category-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:640px){
    .age-stages-title h2{font-size:22px}
    .age-stage-grid{grid-template-columns:1fr}
    .age-stage-icon{width:64px;height:64px}
    .age-stage-icon svg{width:34px;height:34px}
    .tag-category-grid{grid-template-columns:repeat(2,1fr);gap:12px}
    .tag-category-card{padding:12px}
    .tag-cat-icon{width:44px;height:44px}
    .tag-cat-icon svg{width:26px;height:26px}
}

/* ============================================================
   学习路线专题页 v2  [2026-09-09]
   参照 yiyaqimeng.com/xuexiluxian：深绿Hero + 阶段卡 + Tab详情
   ============================================================ */
.xl-hero{
    background:linear-gradient(160deg,#2563eb 0%,#1e3a8a 55%,#172554 100%);
    color:#fff;
    padding:56px 0 104px;
    text-align:center;
}
.xl-badge{
    display:inline-flex;align-items:center;gap:6px;
    border:1px solid rgba(255,255,255,.35);
    border-radius:20px;padding:6px 16px;
    font-size:13px;color:#d8f3dc;margin-bottom:20px;
}
.xl-title{font-size:40px;font-weight:800;letter-spacing:-.5px;margin-bottom:16px;color:#fff}
.xl-title span{color:#f4c445}
.xl-sub{font-size:16px;line-height:1.8;color:rgba(255,255,255,.85);margin-bottom:24px}
.xl-pills{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.xl-pill{
    border:1px solid rgba(255,255,255,.3);
    border-radius:20px;padding:6px 16px;font-size:13px;color:#fff;
    background:rgba(255,255,255,.08);cursor:pointer;transition:all .2s;
}
.xl-pill:hover{background:rgba(255,255,255,.18)}
.xl-hero-btn{
    display:inline-flex;align-items:center;gap:8px;
    background:linear-gradient(135deg,#f4c445,#f0a821);
    color:#3d2c00;border:none;border-radius:12px;
    padding:14px 32px;font-size:16px;font-weight:700;cursor:pointer;
    box-shadow:0 8px 20px rgba(0,0,0,.25);transition:transform .2s;
}
.xl-hero-btn:hover{transform:translateY(-2px)}

.xl-stages{padding:0}
.xl-stage-cards{
    display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
    margin-top:-48px;position:relative;z-index:2;
}
.xl-stage-card{
    background:#fff;border-radius:16px;padding:24px;
    text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.08);
    border:2px solid transparent;cursor:pointer;transition:all .25s;
}
.xl-stage-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(0,0,0,.12)}
.xl-stage-card.active{border-color:#1d4ed8}
.xl-stage-num{
    width:44px;height:44px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    color:#fff;font-size:18px;font-weight:700;margin:0 auto 12px;
}
.xl-stage-card h3{font-size:18px;font-weight:700;color:#1f2937;margin-bottom:4px}
.xl-stage-age{font-size:13px;color:#6b7280;display:block;margin-bottom:10px}
.xl-stage-slogan{
    font-size:13px;color:#374151;text-align:left;
    padding-left:10px;border-left:3px solid #e5e7eb;line-height:1.5;
}

.xl-detail{padding-bottom:40px}
.xl-tabs{
    display:flex;background:#fff;border-radius:16px 16px 0 0;
    border-bottom:1px solid #eef0f3;margin-top:48px;overflow-x:auto;
}
.xl-tab{
    flex:1;padding:16px;text-align:center;font-size:15px;
    color:#6b7280;cursor:pointer;border:none;background:none;
    font-weight:500;white-space:nowrap;position:relative;transition:color .2s;
}
.xl-tab.active{color:#1d4ed8;font-weight:700}
.xl-tab.active::after{
    content:'';position:absolute;left:20%;right:20%;bottom:0;
    height:3px;background:#1d4ed8;border-radius:2px;
}
.xl-panel{display:none;background:#fff;border-radius:0 0 16px 16px;padding:32px}
.xl-panel.active{display:block}

.xl-abilities{
    display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:24px;
}
.xl-ability{
    border:1px solid #eef0f3;border-radius:12px;padding:16px;
    display:flex;gap:12px;align-items:flex-start;background:#fafbfc;
}
.xl-ability-icon{font-size:22px;line-height:1.2;flex-shrink:0}
.xl-ability h4{font-size:15px;font-weight:600;color:#1f2937;margin-bottom:4px}
.xl-ability p{font-size:13px;color:#6b7280;line-height:1.6;margin:0}

.xl-tip{
    background:#eff6ff;border-left:4px solid #1d4ed8;
    border-radius:8px;padding:12px 16px;font-size:14px;color:#1d4ed8;margin-bottom:20px;
}
.xl-resources{display:flex;flex-direction:column;gap:12px;margin-bottom:32px}
.xl-resource{
    display:flex;align-items:center;gap:14px;
    border:1px solid #eef0f3;border-radius:12px;padding:14px 18px;
    transition:all .2s;
}
.xl-resource:hover{border-color:#1d4ed8;box-shadow:0 4px 12px rgba(45,106,79,.1)}
.xl-resource-icon{font-size:24px;flex-shrink:0}
.xl-resource-info{flex:1;min-width:0}
.xl-resource-info h4{font-size:15px;font-weight:700;color:#1f2937;margin-bottom:2px}
.xl-resource-info p{font-size:13px;color:#6b7280;margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.xl-resource-tag{
    flex-shrink:0;font-size:12px;padding:4px 12px;border-radius:12px;
    background:#e8f0fe;color:#1d4ed8;font-weight:600;
}
.xl-cta{
    background:linear-gradient(135deg,#1d4ed8,#1e3a8a);
    border-radius:16px;padding:32px;text-align:center;color:#fff;
}
.xl-cta h3{font-size:20px;font-weight:700;margin-bottom:8px;color:#fff}
.xl-cta p{font-size:14px;color:rgba(255,255,255,.8);margin-bottom:20px}
.xl-cta-btn{
    background:linear-gradient(135deg,#f4c445,#f0a821);color:#3d2c00;
    border:none;border-radius:10px;padding:12px 28px;
    font-size:15px;font-weight:700;cursor:pointer;transition:transform .2s;
}
.xl-cta-btn:hover{transform:translateY(-2px)}

@media (max-width:768px){
    .xl-hero{padding:40px 0 88px}
    .xl-title{font-size:28px}
    .xl-stage-cards{grid-template-columns:repeat(2,1fr);gap:12px}
    .xl-abilities{grid-template-columns:1fr}
    .xl-panel{padding:20px}
    .xl-resource-info p{white-space:normal}
}

/* ============================================================
   头部一行布局  [2026-09-09]
   logo + 导航 + 搜索(缩短) + 加微信，去掉热门标签与第二行导航
   ============================================================ */
.header-inner{gap:14px}
.main-nav{
    background:none;
    border-bottom:none;
    flex:1 1 auto;
    min-width:0;
}
.main-nav .nav-list{gap:0}
.main-nav .nav-link{padding:10px 13px;font-size:15px}
.header-search{flex:0 1 300px;max-width:300px}
.header-wechat{margin-left:auto}

@media (max-width:1200px){
    .main-nav .nav-link{padding:10px 9px;font-size:14px}
    .header-search{flex-basis:220px}
}

@media (max-width:1024px){
    .main-nav{display:none}
    .main-nav.mobile-open{
        display:block;
        order:4;
        flex-basis:100%;
        border-top:1px solid var(--border);
    }
    .main-nav.mobile-open .nav-list{flex-wrap:wrap;padding-top:4px}
    .main-nav.mobile-open .nav-link{display:block;padding:10px 0;font-size:15px;border-bottom:1px solid #f3f4f6}
    .main-nav.mobile-open .nav-list li:last-child .nav-link{border-bottom:none}
    .header-wechat{margin-left:0}
}

@media (max-width:768px){
    .header-inner{flex-wrap:wrap;height:auto;padding:12px 20px;gap:10px}
    .header-logo{order:1}
    .header-wechat{order:2;margin-left:0}
    .mobile-menu-toggle{display:flex;order:3;margin-left:auto}
    .main-nav{order:4}
    .header-search{order:5;flex-basis:100%;max-width:100%;width:100%}
}


/* ============================================================
   浅色页脚  [2026-09-09-7]
   深色底 -> 浅色底，与整站浅色风格统一
   ============================================================ */
.footer{background:#fafbfd;color:#666;border-top:1px solid #e5e7eb}
.footer-title{color:#333}
.footer-desc{color:#999}
.footer-logo .logo-text{color:var(--primary)}
.footer-links a{color:#666}
.footer-links a:hover{color:var(--primary)}
.footer-weixin p{color:#999}
.footer-qr-placeholder{background:#fff;border:1px dashed #d1d5db;color:#9ca3af}
.footer-bottom{border-top:1px solid #e5e7eb}
.footer-bottom p,.footer-bottom a{color:#9ca3af}
.friend-links-title{color:#666}
.friend-link{color:#9ca3af}
.friend-link:hover{color:var(--primary)}


/* ============================================================
   内页资源列表固定 4 列  [2026-09-09-9]
   一行4个 x 每页12条 = 3行（tag/category/search/collection）
   ============================================================ */
.category-page .resource-grid,
.tag-page .resource-grid,
.search-page .resource-grid,
.collection-page .resource-grid{grid-template-columns:repeat(4,1fr);gap:20px}
@media (max-width:1024px){
    .category-page .resource-grid,
    .tag-page .resource-grid,
    .search-page .resource-grid,
    .collection-page .resource-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:768px){
    .category-page .resource-grid,
    .tag-page .resource-grid,
    .search-page .resource-grid,
    .collection-page .resource-grid{grid-template-columns:repeat(2,1fr)}
}


/* ============================================================
   详情页封面空白修复  [2026-09-09-10]
   detail-header 为 flex 且默认 stretch，右侧信息区更高时
   左侧封面容器被拉伸，图片下方出现空白 -> 改为顶部对齐
   ============================================================ */
.detail-header{align-items:flex-start}
.detail-cover{align-self:flex-start}


/* ============================================================
   移动端展开菜单修复  [2026-09-09-11]
   nav-list 保持 flex 导致导航项挤成一行 -> 展开时改为纵向块级
   ============================================================ */
@media (max-width:1024px){
    .main-nav.mobile-open .nav-list{display:block;padding:4px 0}
    .main-nav.mobile-open .nav-list li{display:block}
    .main-nav.mobile-open .nav-link{
        display:block;
        padding:12px 8px;
        font-size:15px;
        border-radius:8px;
        border-bottom:none;
    }
    .main-nav.mobile-open .nav-list li + li .nav-link{border-top:1px solid #f3f4f6}
    .main-nav.mobile-open .nav-link.active{
        background:#FFF3E0;
        color:var(--primary);
        box-shadow:none;
        font-weight:700;
    }
}