/* ============================================
   606导航 - 响应式设计系统
   断点：PC ≥1200 · 平板 768~1199 · 手机 <768
   ============================================ */

/* ========== 基础响应式容器 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}
@media (min-width: 1400px) {
    .container { max-width: 1320px; }
}
@media (max-width: 1199px) {
    .container { max-width: 960px; padding: 0 14px; }
}
@media (max-width: 767px) {
    .container { max-width: 100%; padding: 0 12px; }
}

/* ========== 显示/隐藏工具类 ========== */
.pc-only   { display: initial; }
.pad-only  { display: none; }
.mobile-only{ display: none; }

@media (max-width: 1199px) and (min-width: 768px) {
    .pc-only   { display: none; }
    .pad-only  { display: initial; }
}
@media (max-width: 767px) {
    .pc-only    { display: none; }
    .pad-only   { display: none; }
    .mobile-only{ display: initial; }
}

/* ========== Header 头部响应式 ========== */
.header { position: sticky; top: 0; z-index: 1000; }
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
}

/* 平板 */
@media (max-width: 1199px) {
    .header-inner { height: 56px; gap: 10px; }
    .logo { font-size: 20px; }
    .logo i { font-size: 22px; }
    .nav-menu a { padding: 6px 10px; font-size: 13px; }
    .search-box { max-width: 260px; }
    .search-box input { padding: 6px 10px; font-size: 13px; }
    .search-box button { padding: 6px 12px; font-size: 13px; }
    .user-btn { padding: 6px 12px; font-size: 13px; }
}

/* 手机 */
@media (max-width: 767px) {
    .header-inner {
        flex-wrap: wrap;
        height: auto;
        padding: 8px 0;
        gap: 6px;
    }
    .logo { font-size: 18px; flex-shrink: 0; }
    .logo i { font-size: 20px; }
    /* 搜索框换行到第二行 */
    .search-box {
        order: 3;
        width: 100%;
        max-width: 100%;
        margin-top: 4px;
    }
    .search-box input { padding: 8px 12px; font-size: 13px; }
    .search-box button { padding: 8px 12px; font-size: 13px; }
    /* 导航横向滚动 */
    .nav-menu {
        order: 2;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 4px;
        flex-wrap: nowrap;
        gap: 2px;
    }
    .nav-menu::-webkit-scrollbar { display: none; }
    .nav-menu a { font-size: 12px; padding: 5px 10px; white-space: nowrap; }
    .user-menu { margin-left: auto; gap: 4px; }
    .user-btn { padding: 5px 10px; font-size: 12px; }
}

/* ========== Hero 区域响应式 ========== */
.hero { padding: 50px 0 70px; text-align: center; }
.hero h1 { font-size: 38px; font-weight: 800; margin-bottom: 12px; }
.hero p  { font-size: 16px; opacity: .9; margin-bottom: 32px; }

@media (max-width: 1199px) {
    .hero { padding: 40px 0 56px; }
    .hero h1 { font-size: 30px; }
    .hero p  { font-size: 15px; margin-bottom: 24px; }
}
@media (max-width: 767px) {
    .hero { padding: 28px 0 40px; }
    .hero h1 { font-size: 22px; line-height: 1.3; }
    .hero p  { font-size: 13px; margin-bottom: 18px; }
    .hot-keywords { margin-top: 14px; gap: 6px; }
    .hot-keywords a { padding: 3px 12px; font-size: 12px; }
}

/* Hero 搜索 */
.hero-search {
    max-width: 580px;
    margin: 0 auto;
    display: flex;
    background: #fff;
    border-radius: 14px;
    padding: 5px;
    box-shadow: 0 8px 40px rgba(0,0,0,.18);
}
.hero-search input {
    flex: 1;
    border: none;
    outline: none;
    padding: 14px 20px;
    font-size: 16px;
    border-radius: 10px;
    min-width: 0;
}
.hero-search button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 14px 30px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}
@media (max-width: 1199px) {
    .hero-search { max-width: 480px; }
    .hero-search input { padding: 12px 16px; font-size: 14px; }
    .hero-search button { padding: 12px 22px; font-size: 14px; }
}
@media (max-width: 767px) {
    .hero-search { flex-direction: column; padding: 8px; gap: 8px; border-radius: 12px; }
    .hero-search input { padding: 12px 14px; font-size: 14px; }
    .hero-search button { padding: 12px; width: 100%; font-size: 14px; border-radius: 8px; }
}

/* ========== Section 区块 ========== */
.section { padding: 48px 0; }
.section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 10px;
}
.section-title h2 { font-size: 22px; font-weight: 700; display: flex; align-items: center; gap: 10px; }

@media (max-width: 1199px) {
    .section { padding: 36px 0; }
    .section-title h2 { font-size: 20px; }
}
@media (max-width: 767px) {
    .section { padding: 28px 0; }
    .section-title { margin-bottom: 16px; }
    .section-title h2 { font-size: 17px; }
    .section-title h2 i { font-size: 16px; }
    .section-title a { font-size: 13px; }
}

/* ========== 分类导航 ========== */
.cat-nav { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 32px; }
.cat-nav a {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 8px 20px;
    border-radius: 24px;
    font-size: 14px;
    transition: all .25s;
}
@media (max-width: 767px) {
    .cat-nav { gap: 6px; margin-bottom: 20px; }
    .cat-nav a { padding: 6px 14px; font-size: 12px; border-radius: 18px; }
}

/* ========== 网站卡片网格 ========== */
.site-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
}
.site-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px 14px;
    text-align: center;
    transition: all .25s;
    display: block;
}
.favicon {
    width: 42px; height: 42px;
    border-radius: 10px;
    margin: 0 auto 10px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 18px; font-weight: 700;
}
.site-name { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.site-desc { font-size: 12px; color: var(--text-light); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@media (max-width: 1199px) {
    .site-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
    .site-card { padding: 14px 10px; }
    .favicon { width: 36px; height: 36px; font-size: 16px; }
    .site-name { font-size: 14px; }
}
@media (max-width: 767px) {
    .site-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .site-card { padding: 12px 8px; }
    .favicon { width: 32px; height: 32px; font-size: 14px; border-radius: 8px; }
    .site-name { font-size: 13px; }
    .site-desc { font-size: 11px; }
}
@media (max-width: 380px) {
    .site-grid { grid-template-columns: 1fr; }
}

/* ========== 精选推荐 ========== */
.featured-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}
.featured-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    gap: 14px;
    align-items: center;
    transition: all .25s;
}
.fc-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 20px; flex-shrink: 0; }
.fc-info h4 { font-size: 15px; font-weight: 600; }
.fc-info p  { font-size: 12px; color: var(--text-light); margin-top: 3px; }

@media (max-width: 1199px) {
    .featured-row { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
    .featured-card { padding: 16px; gap: 12px; }
    .fc-icon { width: 40px; height: 40px; font-size: 18px; }
}
@media (max-width: 767px) {
    .featured-row { grid-template-columns: 1fr; gap: 10px; }
    .featured-card { padding: 14px; }
    .fc-icon { width: 36px; height: 36px; font-size: 16px; border-radius: 10px; }
    .fc-info h4 { font-size: 14px; }
}

/* ========== 首页双栏布局（主内容 + 侧栏） ========== */
.home-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 28px;
    align-items: start;
}
.home-main { min-width: 0; }
.home-sidebar { min-width: 0; }

@media (max-width: 1199px) {
    .home-layout { grid-template-columns: 1fr 280px; gap: 20px; }
}
@media (max-width: 991px) {
    .home-layout { grid-template-columns: 1fr; gap: 24px; }
    .home-sidebar { order: 2; }
}

/* ========== 排行榜 ========== */
.rank-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border);
    flex-wrap: wrap;
}
.rank-tab {
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    color: var(--text-light);
    background: none;
    transition: all .25s;
}
.rank-tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

.rank-list { background: var(--card); border-radius: 12px; overflow: hidden; }
.rank-item {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid #f0f0f0;
}
.rank-num {
    width: 30px; height: 30px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px; margin-right: 14px; flex-shrink: 0;
}
.rank-num.top1 { background: #FF6B6B; color: #fff; }
.rank-num.top2 { background: #FFA94D; color: #fff; }
.rank-num.top3 { background: #51CF66; color: #fff; }
.rank-num.normal { background: #EDF2F7; color: var(--text-light); }
.r-name { flex: 1; font-weight: 500; }
.r-clicks { color: var(--text-light); font-size: 13px; }

@media (max-width: 767px) {
    .rank-tabs { gap: 0; margin-bottom: 16px; }
    .rank-tab { padding: 10px 14px; font-size: 13px; }
    .rank-item { padding: 10px 14px; }
    .rank-num { width: 26px; height: 26px; font-size: 12px; margin-right: 10px; }
    .r-name { font-size: 13px; }
    .r-clicks { font-size: 12px; }
}

/* ========== 文字广告网格 ========== */
.text-ad-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}
.text-ad-item {
    padding: 8px 12px;
    background: #f8f9ff;
    border-radius: 6px;
    font-size: 14px;
    text-align: center;
    transition: all .3s;
}
@media (max-width: 1199px) {
    .text-ad-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .text-ad-item { font-size: 13px; padding: 7px 10px; }
}
@media (max-width: 767px) {
    .text-ad-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .text-ad-item { font-size: 12px; padding: 6px 8px; border-radius: 5px; }
}
@media (max-width: 380px) {
    .text-ad-grid { grid-template-columns: 1fr; }
}

/* ========== 图片广告位 ========== */
.ad-banner { width: 100%; border-radius: 12px; overflow: hidden; margin-bottom: 16px; }
.ad-banner img { width: 100%; height: auto; display: block; }
.ad-banner-side { width: 100%; border-radius: 10px; overflow: hidden; margin-bottom: 14px; }
.ad-banner-side img { width: 100%; height: auto; display: block; }

@media (max-width: 767px) {
    .ad-banner { margin-bottom: 10px; border-radius: 8px; }
    .ad-banner-side { margin-bottom: 10px; }
}

/* ========== 表单 ========== */
.form-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--card);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 16px rgba(0,0,0,.06);
}
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 6px; }
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: all .25s;
    font-family: inherit;
    background: #fff;
    color: var(--text);
}
.form-group textarea { resize: vertical; min-height: 100px; }

@media (max-width: 1199px) {
    .form-container { max-width: 560px; padding: 32px; }
}
@media (max-width: 767px) {
    .form-container { padding: 24px 18px; border-radius: 12px; }
    .form-group label { font-size: 13px; }
    .form-group input,
    .form-group textarea,
    .form-group select { padding: 10px 12px; font-size: 13px; }
    .form-group textarea { min-height: 80px; }
    .btn { padding: 10px 18px; font-size: 14px; }
    .btn-block { width: 100%; }
}

/* ========== 文章 ========== */
.article-list { display: grid; gap: 16px; }
.article-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    transition: all .25s;
    display: block;
}
.article-item h3 { font-size: 18px; margin-bottom: 8px; }
.article-item .meta { font-size: 13px; color: var(--text-light); margin-bottom: 10px; }
.article-item p { color: #4A5568; font-size: 14px; }

.article-detail {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.article-detail h1 { font-size: 28px; margin-bottom: 16px; line-height: 1.4; }
.article-detail .content { line-height: 1.9; font-size: 16px; color: #2D3748; }

@media (max-width: 1199px) {
    .article-detail { padding: 32px; }
    .article-detail h1 { font-size: 24px; }
}
@media (max-width: 767px) {
    .article-item { padding: 16px; border-radius: 10px; }
    .article-item h3 { font-size: 16px; }
    .article-item .meta { font-size: 12px; }
    .article-item p { font-size: 13px; }
    .article-detail { padding: 24px 18px; border-radius: 12px; }
    .article-detail h1 { font-size: 20px; }
    .article-detail .content { font-size: 14px; line-height: 1.8; }
}

/* ========== 单页（About / Source） ========== */
.about-box,
.source-box {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.about-hero,
.source-hero {
    text-align: center;
    padding: 48px 20px 32px;
    background: var(--header-gradient);
    color: #fff;
    border-radius: 16px 16px 0 0;
    margin: -40px -40px 32px;
}
.about-hero h1,
.source-hero h1 { font-size: 30px; margin-bottom: 8px; }
.about-hero p,
.source-hero p  { font-size: 15px; opacity: .9; }

.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 28px;
}
.stat-card {
    background: #F7FAFC;
    border: 1px solid #EDF2F7;
    border-radius: 10px;
    padding: 18px;
    text-align: center;
}
.stat-card .num { font-size: 24px; font-weight: 800; color: var(--primary); }
.stat-card .lbl { font-size: 12px; color: var(--text-light); margin-top: 4px; }

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 10px;
    margin-top: 16px;
}
.feature-list li {
    background: #F7FAFC;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    border: 1px solid #EDF2F7;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin: 20px 0;
}
.tech-card {
    background: #F7FAFC;
    border: 1px solid #EDF2F7;
    border-radius: 10px;
    padding: 18px 14px;
    text-align: center;
}
.tech-card i { font-size: 28px; color: var(--primary); display: block; margin-bottom: 8px; }
.tech-card h4 { font-size: 14px; font-weight: 600; }

.timeline { margin-top: 20px; }
.timeline-item {
    display: flex;
    gap: 14px;
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
}
.timeline-item:last-child { border-bottom: none; }
.timeline-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); margin-top: 5px; flex-shrink: 0; }

.contact-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 20px;
}
.contact-card {
    background: #F7FAFC;
    border: 1px solid #EDF2F7;
    border-radius: 10px;
    padding: 16px;
    text-align: center;
}
.contact-card i { font-size: 22px; color: var(--primary); display: block; margin-bottom: 6px; }
.contact-card h4 { font-size: 13px; font-weight: 600; }
.contact-card p { font-size: 12px; color: var(--text-light); margin-top: 2px; }

@media (max-width: 1199px) {
    .stats-row { grid-template-columns: repeat(4, 1fr); gap: 10px; }
    .stat-card { padding: 14px 10px; }
    .stat-card .num { font-size: 20px; }
    .tech-grid { grid-template-columns: repeat(3, 1fr); }
    .contact-cards { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 767px) {
    .about-box, .source-box { padding: 24px 16px; border-radius: 12px; }
    .about-hero, .source-hero {
        padding: 32px 16px 24px;
        margin: -24px -16px 20px;
        border-radius: 12px 12px 0 0;
    }
    .about-hero h1, .source-hero h1 { font-size: 22px; }
    .about-hero p, .source-hero p { font-size: 13px; }
    .stats-row { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .stat-card { padding: 12px 8px; }
    .stat-card .num { font-size: 18px; }
    .stat-card .lbl { font-size: 11px; }
    .tech-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .tech-card { padding: 14px 10px; }
    .tech-card i { font-size: 22px; }
    .contact-cards { grid-template-columns: 1fr; gap: 8px; }
    .feature-list { grid-template-columns: 1fr; }
    .timeline-item { font-size: 13px; }
}

/* ========== 广告位卡片 ========== */
.ad-positions {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}
.ad-pos-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 24px;
    text-align: center;
    transition: all .25s;
}
.ad-pos-card .price { font-size: 26px; font-weight: 700; color: var(--primary); margin: 12px 0; }

@media (max-width: 767px) {
    .ad-positions { grid-template-columns: 1fr; gap: 12px; }
    .ad-pos-card { padding: 20px 16px; }
    .ad-pos-card .price { font-size: 22px; }
}

/* ========== 友情链接 ========== */
.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}
.link-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 14px;
    text-align: center;
    transition: all .25s;
    display: block;
}
@media (max-width: 767px) {
    .link-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .link-item { padding: 12px 10px; font-size: 13px; }
}
@media (max-width: 380px) {
    .link-grid { grid-template-columns: 1fr; }
}

/* ========== 代码块 ========== */
.code-block {
    background: #1A202C;
    color: #E2E8F0;
    padding: 20px 24px;
    border-radius: 12px;
    font-family: "Fira Code", "Consolas", monospace;
    font-size: 13px;
    line-height: 2;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
@media (max-width: 767px) {
    .code-block { padding: 14px 16px; font-size: 12px; border-radius: 8px; }
}

/* ========== 表格（后台） ========== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.data-table th {
    background: #F7FAFC;
    padding: 12px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-light);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}
.data-table td {
    padding: 12px 14px;
    border-bottom: 1px solid #f0f0f0;
    vertical-align: middle;
}
.data-table tr:hover td { background: #F8FAFF; }

.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table-responsive::-webkit-scrollbar { height: 6px; }
.table-responsive::-webkit-scrollbar-thumb { background: #c1c9d6; border-radius: 3px; }

@media (max-width: 1199px) {
    .data-table { font-size: 13px; }
    .data-table th, .data-table td { padding: 10px 10px; }
}
@media (max-width: 767px) {
    .data-table { font-size: 12px; min-width: 600px; }
    .data-table th, .data-table td { padding: 8px 8px; }
    /* 移动端卡片化表格 */
    .table-card-view .data-table,
    .table-card-view thead,
    .table-card-view tbody,
    .table-card-view tr,
    .table-card-view th,
    .table-card-view td { display: block; width: 100%; }
    .table-card-view thead { display: none; }
    .table-card-view tr {
        border: 1px solid var(--border);
        border-radius: 10px;
        margin-bottom: 10px;
        padding: 8px;
    }
    .table-card-view td {
        border: none;
        padding: 4px 8px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .table-card-view td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-light);
        font-size: 11px;
        margin-right: 8px;
    }
}

/* ========== 分页 ========== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-top: 28px;
    flex-wrap: wrap;
}
.pagination a,
.pagination span {
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 13px;
    border: 1px solid var(--border);
    transition: all .25s;
}
.pagination .active,
.pagination .current {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
@media (max-width: 767px) {
    .pagination { gap: 3px; margin-top: 20px; }
    .pagination a, .pagination span { padding: 6px 10px; font-size: 12px; }
}

/* ========== 弹窗/模态框 ========== */
.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,.5);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.modal-box {
    background: #fff;
    border-radius: 14px;
    padding: 28px;
    width: 100%;
    max-width: 420px;
    max-height: 90vh;
    overflow-y: auto;
}
@media (max-width: 767px) {
    .modal-overlay { padding: 10px; align-items: flex-end; }
    .modal-box {
        padding: 20px 16px;
        border-radius: 14px 14px 0 0;
        max-width: 100%;
        max-height: 85vh;
    }
}

/* ========== 统计卡片（仪表盘） ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}
.stats-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 14px;
}
.stats-card .icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; color: #fff; flex-shrink: 0;
}
.stats-card .info h3 { font-size: 24px; font-weight: 800; }
.stats-card .info p  { font-size: 13px; color: var(--text-light); }

@media (max-width: 1199px) {
    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
    .stats-card { padding: 16px; }
    .stats-card .icon { width: 40px; height: 40px; font-size: 18px; }
    .stats-card .info h3 { font-size: 20px; }
}
@media (max-width: 767px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .stats-card { padding: 12px; gap: 10px; }
    .stats-card .icon { width: 36px; height: 36px; font-size: 16px; border-radius: 10px; }
    .stats-card .info h3 { font-size: 18px; }
    .stats-card .info p { font-size: 11px; }
}

/* ========== 图表容器 ========== */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}
.chart-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
}
.chart-box h3 { font-size: 16px; margin-bottom: 14px; }
.chart-area { width: 100%; height: 280px; }

@media (max-width: 1199px) {
    .chart-grid { gap: 14px; }
    .chart-box { padding: 16px; }
    .chart-area { height: 240px; }
}
@media (max-width: 767px) {
    .chart-grid { grid-template-columns: 1fr; gap: 12px; }
    .chart-box { padding: 14px; }
    .chart-box h3 { font-size: 14px; margin-bottom: 10px; }
    .chart-area { height: 200px; }
}

/* ========== Footer 页脚 ========== */
.footer { background: #1A202C; color: #A0AEC0; padding: 48px 0 24px; margin-top: 60px; }
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-col a { display: block; color: #A0AEC0; font-size: 13px; padding: 4px 0; }
.footer-col p { font-size: 13px; line-height: 1.8; }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid #2D3748; font-size: 13px; }

@media (max-width: 1199px) {
    .footer { padding: 36px 0 20px; margin-top: 40px; }
    .footer-grid { gap: 20px; }
}
@media (max-width: 767px) {
    .footer { padding: 28px 0 16px; margin-top: 32px; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; margin-bottom: 20px; }
    .footer-col h4 { font-size: 14px; margin-bottom: 10px; }
    .footer-col a, .footer-col p { font-size: 12px; }
    .footer-bottom { font-size: 12px; padding-top: 16px; }
}
@media (max-width: 480px) {
    .footer-grid { grid-template-columns: 1fr; }
}

/* ========== 用户菜单 ========== */
.user-menu { display: flex; align-items: center; gap: 8px; margin-left: 12px; }
.user-btn {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    color: #fff;
    background: rgba(255,255,255,.15);
    backdrop-filter: blur(6px);
    transition: all .25s;
    white-space: nowrap;
    border: none;
    cursor: pointer;
}
.user-btn:hover { background: rgba(255,255,255,.3); color: #fff; }
.user-btn.register-btn { background: linear-gradient(135deg, #FF6B6B, #FF8E53); font-weight: 600; }

@media (max-width: 1199px) {
    .user-menu { margin-left: 8px; gap: 6px; }
    .user-btn { padding: 6px 12px; font-size: 13px; }
}
@media (max-width: 767px) {
    .user-menu { margin-left: auto; gap: 4px; }
    .user-btn { padding: 5px 10px; font-size: 12px; border-radius: 16px; }
    .user-btn span.hide-mobile { display: none; }
}

/* ========== 提示框 ========== */
.notice-box { padding: 16px 20px; border-radius: 12px; font-size: 13px; margin-top: 20px; line-height: 2; }
.notice-blue   { background: #EBF8FF; color: #2B6CB0; }
.notice-green  { background: #F0FFF4; color: #276749; }
.notice-yellow { background: #FFFFF0; color: #975A16; }
.notice-red    { background: #FFF5F5; color: #C53030; }
@media (max-width: 767px) {
    .notice-box { padding: 12px 14px; font-size: 12px; border-radius: 8px; }
}

/* ========== Toast ========== */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 28px;
    border-radius: 10px;
    font-size: 14px;
    z-index: 9999;
    animation: slideDown .3s ease;
    color: #fff;
    box-shadow: 0 4px 16px rgba(0,0,0,.15);
    max-width: 90vw;
    text-align: center;
}
.toast.success { background: #48BB78; }
.toast.error   { background: #F56565; }
@keyframes slideDown {
    from { opacity: 0; transform: translate(-50%, -20px); }
    to   { opacity: 1; transform: translate(-50%, 0); }
}
@media (max-width: 767px) {
    .toast { top: 70px; padding: 10px 20px; font-size: 13px; }
}

/* ========== 空状态 ========== */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state i { font-size: 48px; margin-bottom: 16px; opacity: .3; display: block; }
.empty-state p { font-size: 14px; }
@media (max-width: 767px) {
    .empty-state { padding: 40px 16px; }
    .empty-state i { font-size: 36px; }
    .empty-state p { font-size: 13px; }
}

/* ========== 按钮组响应式 ========== */
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }
@media (max-width: 767px) {
    .btn-group { gap: 6px; }
    .btn-group .btn { padding: 8px 14px; font-size: 13px; }
}

/* ========== 选项卡响应式 ========== */
.tab-bar {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.tab-bar a, .tab-bar button {
    padding: 10px 20px;
    font-size: 14px;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    background: none;
    cursor: pointer;
    color: var(--text-light);
    transition: all .25s;
    white-space: nowrap;
}
.tab-bar a.active, .tab-bar button.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}
@media (max-width: 767px) {
    .tab-bar a, .tab-bar button { padding: 8px 14px; font-size: 13px; }
}

/* ========== 登录/注册页面 ========== */
.auth-wrapper {
    min-height: calc(100vh - 64px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--card);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 8px 30px rgba(0,0,0,.08);
}
.auth-card h2 { text-align: center; margin-bottom: 28px; font-size: 22px; }
.auth-card .btn-primary { width: 100%; padding: 14px; font-size: 15px; margin-top: 8px; }
.auth-links { text-align: center; margin-top: 20px; font-size: 13px; }
.auth-links a { color: var(--primary); margin: 0 8px; }

@media (max-width: 767px) {
    .auth-wrapper { padding: 12px; min-height: calc(100vh - 100px); }
    .auth-card { padding: 28px 20px; border-radius: 12px; }
    .auth-card h2 { font-size: 20px; margin-bottom: 20px; }
    .auth-card .btn-primary { padding: 12px; font-size: 14px; }
}

/* ========== 个人中心 ========== */
.profile-header {
    background: var(--header-gradient);
    border-radius: 16px;
    padding: 32px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 28px;
}
.profile-avatar {
    width: 72px; height: 72px;
    border-radius: 50%;
    background: rgba(255,255,255,.2);
    display: flex; align-items: center; justify-content: center;
    font-size: 28px; font-weight: 700; flex-shrink: 0;
}
.profile-info h2 { font-size: 22px; margin-bottom: 4px; }
.profile-info p  { font-size: 13px; opacity: .85; }

.profile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 14px;
    margin-bottom: 28px;
}
.profile-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}
.profile-card .num { font-size: 28px; font-weight: 800; color: var(--primary); }
.profile-card .lbl { font-size: 13px; color: var(--text-light); margin-top: 4px; }

.profile-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 28px;
}
.profile-action {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px;
    text-align: center;
    transition: all .25s;
    display: block;
}
.profile-action:hover { border-color: var(--primary); }
.profile-action i { font-size: 22px; color: var(--primary); display: block; margin-bottom: 8px; }
.profile-action h4 { font-size: 14px; font-weight: 600; }

@media (max-width: 1199px) {
    .profile-header { padding: 24px; gap: 16px; }
    .profile-avatar { width: 60px; height: 60px; font-size: 24px; }
    .profile-info h2 { font-size: 20px; }
}
@media (max-width: 767px) {
    .profile-header { flex-direction: column; text-align: center; padding: 24px 16px; border-radius: 12px; }
    .profile-avatar { width: 56px; height: 56px; font-size: 22px; }
    .profile-info h2 { font-size: 18px; }
    .profile-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .profile-card { padding: 14px 10px; }
    .profile-card .num { font-size: 22px; }
    .profile-card .lbl { font-size: 12px; }
    .profile-actions { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .profile-action { padding: 14px 10px; }
    .profile-action i { font-size: 18px; }
    .profile-action h4 { font-size: 13px; }
}

/* ========== 支付页面 ========== */
.pay-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 28px;
}
.pay-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all .25s;
}
.pay-card:hover { border-color: var(--primary); }
.pay-card.selected { border-color: var(--primary); background: #F0F4FF; }
.pay-card i { font-size: 36px; margin-bottom: 10px; display: block; }
.pay-card h4 { font-size: 16px; font-weight: 600; }

@media (max-width: 767px) {
    .pay-grid { grid-template-columns: 1fr; gap: 12px; }
    .pay-card { padding: 18px; }
    .pay-card i { font-size: 28px; }
    .pay-card h4 { font-size: 14px; }
}

/* ========== 防止横向溢出 ========== */
html, body { overflow-x: hidden; }
img, video, iframe { max-width: 100%; height: auto; }
* { word-wrap: break-word; overflow-wrap: break-word; }

/* ========== 触摸优化 ========== */
@media (hover: none) {
    .site-card:hover,
    .featured-card:hover,
    .article-item:hover,
    .link-item:hover { transform: none; }
    .btn:hover { transform: none; }
    /* 增大触摸目标 */
    .nav-menu a { padding: 8px 14px; }
    .btn { min-height: 40px; }
}

/* ========== 打印样式 ========== */
@media print {
    .header, .footer, .nav-menu, .search-box, .btn { display: none !important; }
    body { background: #fff; color: #000; }
    .container { max-width: 100%; }
    a { color: #000; text-decoration: underline; }
}

/* ================= 文章上下篇导航 ================= */
.prev-next-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 32px;
}

.pn-card {
    display: block;
    padding: 16px 18px;
    border-radius: 10px;
    text-decoration: none;
    background: #F7FAFC;
    border: 1px solid #E2E8F0;
    transition: all .25s ease;
    position: relative;
    overflow: hidden;
}
.pn-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102,126,234,.06) 100%);
    opacity: 0;
    transition: opacity .25s;
}
.pn-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,.08);
    border-color: #667EEA;
}
.pn-card:hover::before { opacity: 1; }

.pn-prev { text-align: left; }
.pn-next { text-align: right; }

.pn-label {
    font-size: 11px;
    color: #A0AEC0;
    margin-bottom: 6px;
    font-weight: 600;
    letter-spacing: .5px;
    text-transform: uppercase;
}
.pn-prev .pn-label { padding-left: 4px; }
.pn-next .pn-label { padding-right: 4px; }

.pn-title {
    font-size: 14px;
    font-weight: 600;
    color: #2D3748;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    position: relative;
    z-index: 1;
}
.pn-card:hover .pn-title { color: #667EEA; }

.pn-cat {
    font-size: 11px;
    color: #718096;
    margin-top: 6px;
    position: relative;
    z-index: 1;
}
.pn-cat .fas, .pn-cat .fab { color: #667EEA; margin-right: 3px; }

/* 空状态 */
.pn-empty {
    background: #F7FAFC;
    border: 1px dashed #CBD5E0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: .7;
}
.pn-empty .pn-title { font-weight: 400; }

/* 暗黑模式适配 */
[data-theme="dark"] .pn-card,
[data-theme="dark"] .pn-empty {
    background: #2D3748;
    border-color: #4A5568;
}
[data-theme="dark"] .pn-title { color: #E2E8F0; }
[data-theme="dark"] .pn-label { color: #718096; }
[data-theme="dark"] .pn-cat { color: #A0AEC0; }
[data-theme="dark"] .pn-card:hover { border-color: #667EEA; }
[data-theme="dark"] .pn-empty { border-color: #4A5568; }

/* 平板 */
@media (max-width: 1199px) {
    .prev-next-bar { gap: 10px; }
    .pn-card { padding: 14px 14px; }
    .pn-title { font-size: 13px; }
}

/* 手机 */
@media (max-width: 767px) {
    .prev-next-bar {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .pn-next { text-align: left; }
    .pn-next .pn-label { padding-left: 4px; padding-right: 0; }
    .pn-card { padding: 14px 16px; }
    .pn-label { font-size: 10px; }
    .pn-title { font-size: 13px; }
}