/* ============================================================
   UKAssignment 文章详情页 - 样式表
   依赖：index.css（提供 :root 变量 / 通用组件 / 动画基础）
   引用：<link rel="stylesheet" href="/skin/css/index.css">
   布局：阅读进度条 + 面包屑 + 文章封面 + 主体（正文 + 侧栏）+ 相关 + CTA
   ============================================================ */

  /* ===== 阅读进度条 ===== */
  .reading-progress{
    position:fixed;top:0;left:0;height:3px;width:0;z-index:200;
    background:linear-gradient(90deg,var(--gold-600),var(--gold-300));
    box-shadow:0 0 8px rgba(176,141,87,.55);
    transition:width .1s linear;
  }

  /* ===== 面包屑（独立区域） ===== */
  .breadcrumb{
    background:linear-gradient(180deg,var(--cream),var(--paper));
    border-bottom:1px solid var(--line);
    font-size:13px;font-family:-apple-system,"PingFang SC",sans-serif;color:var(--muted);
  }
  .breadcrumb .wrap{display:flex;align-items:center;gap:8px;min-height:42px;flex-wrap:wrap}
  .breadcrumb a{color:var(--navy-700);transition:color .2s}
  .breadcrumb a:hover{color:var(--gold-700)}
  .breadcrumb .sep{color:var(--line)}
  .breadcrumb [aria-current="page"]{color:var(--ink);font-weight:600}

  /* ===== 文章封面（hero） ===== */
  .article-hero{
    position:relative;overflow:hidden;color:#fff;
    background:linear-gradient(135deg,var(--navy-950) 0%,var(--navy-800) 55%,var(--navy-700) 100%);
    padding:48px 0 40px;
  }
  .article-hero::before{
    content:"";position:absolute;inset:0;opacity:.55;
    background:
      radial-gradient(circle at 10% 18%,rgba(176,141,87,.22),transparent 32%),
      radial-gradient(circle at 90% 8%,rgba(201,169,97,.18),transparent 30%);
  }
  .article-hero .wrap{position:relative;z-index:1;max-width:880px}

  .article-tags-top{
    display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;
  }
  .article-tags-top .at-tag{
    background:transparent;border:1px solid rgba(220,194,138,.35);
    color:#cdd6e3;font-size:12px;font-weight:600;letter-spacing:.4px;
    padding:5px 12px;border-radius:999px;
    font-family:-apple-system,"PingFang SC",sans-serif;transition:.22s;
    max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  }
  .article-tags-top .at-tag:hover{background:rgba(220,194,138,.3);color:#fff;transform:translateY(-2px)}
  .article-tags-top .at-cat{
    background:linear-gradient(135deg,var(--gold-600),var(--gold-400));
    color:var(--navy-900);border-color:var(--gold-400);
  }

  .article-hero h1{
    margin:0 0 18px;font-size:clamp(28px,3.8vw,42px);line-height:1.22;letter-spacing:-.4px;
    font-family:Georgia,"Songti SC",serif;
  }
  .article-hero .lead{
    color:#cdd6e3;font-size:16px;margin:0 0 24px;max-width:760px;
    font-family:-apple-system,"PingFang SC",sans-serif;line-height:1.85;
  }
  .article-meta-line{
    display:flex;align-items:center;gap:16px;flex-wrap:wrap;
    padding-top:18px;border-top:1px solid rgba(220,194,138,.22);
    font-size:13px;font-family:-apple-system,"PingFang SC",sans-serif;color:#cdd6e3;
  }
  .article-meta-line .author{
    display:flex;align-items:center;gap:10px;color:#fff;font-weight:600;
  }
  .author-avatar{
    width:36px;height:36px;border-radius:50%;flex:none;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--gold-600),var(--gold-400));color:var(--navy-900);
    font-family:Georgia,serif;font-weight:700;font-size:14px;
    border:2px solid rgba(255,255,255,.18);
  }
  .article-meta-line .meta-sep{color:rgba(220,194,138,.35)}
  .article-meta-line time{color:var(--gold-300);font-weight:600}
  .article-meta-line .meta-views{color:#cdd6e3}
  .article-meta-line .meta-views svg{width:13px;height:13px;fill:var(--gold-400);vertical-align:-2px;margin-right:4px}

  /* ===== 主体两列布局：正文 + 侧栏 ===== */
  .article-body-section{padding:48px 0 64px}
  .article-body-grid{
    display:grid;grid-template-columns:1fr 320px;gap:36px;align-items:start;
  }

  /* ===== 文章正文 ===== */
  .article-content{
    min-width:0;background:var(--paper);
    border:1px solid var(--line);border-radius:18px;
    padding:36px 40px;box-shadow:0 12px 30px rgba(13,27,46,.05);
  }
  .article-content h2{
    margin:36px 0 14px;font-size:24px;line-height:1.4;color:var(--navy-900);
    font-family:Georgia,"Songti SC",serif;letter-spacing:.2px;
    padding-left:14px;border-left:4px solid var(--gold-500);
    scroll-margin-top:96px;
  }
  .article-content h2:first-child{margin-top:0}
  .article-content h3{
    margin:24px 0 10px;font-size:18px;line-height:1.5;color:var(--navy-800);
    font-family:Georgia,"Songti SC",serif;
    scroll-margin-top:96px;
  }
  .article-content h3::before{content:"◆";color:var(--gold-500);font-size:11px;margin-right:8px;vertical-align:2px}
  .article-content p{
    margin:0 0 18px;color:var(--ink);font-size:15.5px;line-height:1.92;
    font-family:-apple-system,"PingFang SC",sans-serif;
  }
  .article-content strong{color:var(--navy-900);font-weight:700}
  .article-content em{color:var(--gold-700);font-style:normal;font-weight:600;border-bottom:1px dashed var(--gold-400)}
  .article-content a{color:var(--gold-700);text-decoration:underline;text-decoration-color:rgba(176,141,87,.4);text-underline-offset:3px;transition:.2s}
  .article-content a:hover{color:var(--navy-900);text-decoration-color:var(--gold-600)}
  .article-content ul,.article-content ol{margin:0 0 18px;padding-left:24px;color:var(--ink);font-size:15.5px;line-height:1.92;font-family:-apple-system,"PingFang SC",sans-serif}
  .article-content li{margin-bottom:8px}
  .article-content li::marker{color:var(--gold-600)}

  /* 引用块 */
  .article-content blockquote{
    margin:22px 0;padding:18px 22px;border-radius:12px;
    background:linear-gradient(135deg,var(--cream),#fff);
    border-left:4px solid var(--gold-500);
    box-shadow:0 8px 22px rgba(176,141,87,.1);
    position:relative;
  }
  .article-content blockquote::before{
    content:"\201C";position:absolute;top:-8px;left:14px;
    font-size:54px;color:var(--gold-400);font-family:Georgia,serif;line-height:1;opacity:.5;
  }
  .article-content blockquote p{
    margin:0;color:var(--navy-800);font-style:italic;font-size:15px;line-height:1.85;
  }
  .article-content blockquote cite{
    display:block;margin-top:8px;color:var(--gold-700);font-size:13px;font-style:normal;font-weight:600;
  }

  /* 内嵌图片 */
  .article-content figure{margin:24px 0}
  .article-content figure img{
    width:100%;border-radius:14px;border:1px solid var(--line);
    box-shadow:0 14px 32px rgba(13,27,46,.1);
  }
  .article-content figcaption{
    text-align:center;color:var(--muted);font-size:12px;margin-top:8px;
    font-family:-apple-system,"PingFang SC",sans-serif;
  }

  /* 表格 */
  .article-content table{
    width:100%;border-collapse:collapse;margin:22px 0;border-radius:12px;overflow:hidden;
    box-shadow:0 8px 22px rgba(13,27,46,.06);font-size:14px;
    font-family:-apple-system,"PingFang SC",sans-serif;
  }
  .article-content thead{background:linear-gradient(135deg,var(--navy-800),var(--navy-600));color:#fff}
  .article-content th{padding:12px 14px;text-align:left;font-weight:600;letter-spacing:.3px}
  .article-content td{padding:11px 14px;border-bottom:1px solid var(--line);background:#fff}
  .article-content tbody tr:nth-child(even) td{background:var(--cream)}
  .article-content tbody tr:hover td{background:#fff5e0}

  /* 代码块 */
  .article-content pre{
    margin:18px 0;padding:18px 20px;border-radius:12px;
    background:var(--navy-900);color:#e8d9b8;overflow-x:auto;
    font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;font-size:13px;line-height:1.7;
    border:1px solid var(--navy-700);
  }
  .article-content code{
    background:var(--cream);color:var(--gold-700);padding:2px 6px;border-radius:4px;
    font-family:"SFMono-Regular",Consolas,monospace;font-size:.92em;
    border:1px solid var(--line);
  }
  .article-content pre code{background:transparent;color:inherit;padding:0;border:none}

  /* 提示框 */
  .article-content .tip-box{
    margin:22px 0;padding:16px 18px 16px 50px;border-radius:12px;
    background:linear-gradient(135deg,#fff8e7,#fffdf6);
    border:1px solid var(--gold-300);position:relative;
    font-family:-apple-system,"PingFang SC",sans-serif;
  }
  .article-content .tip-box::before{
    content:"💡";position:absolute;left:16px;top:14px;font-size:20px;
  }
  .article-content .tip-box p{margin:0;color:var(--navy-800);font-size:14px;line-height:1.75}
  .article-content .tip-box strong{color:var(--gold-700)}

  /* 文末 Tag 区 */
  .article-footer-tags{
    margin-top:36px;padding-top:24px;border-top:1px dashed var(--line);
  }
  .article-footer-tags .tag-label{
    display:inline-block;font-size:13px;font-weight:700;color:var(--navy-900);
    margin-right:12px;letter-spacing:.5px;
    font-family:-apple-system,"PingFang SC",sans-serif;
  }
  .article-footer-tags .tag-cloud{display:inline-flex;flex-wrap:wrap;gap:8px}

  /* 分享条 */
  .share-bar{
    margin-top:24px;padding:18px 20px;
    background:linear-gradient(135deg,var(--navy-800),var(--navy-700));
    border-radius:14px;display:flex;align-items:center;justify-content:space-between;
    gap:14px;flex-wrap:wrap;color:#fff;
    box-shadow:0 14px 32px rgba(13,27,46,.18);
  }
  .share-bar .share-text{font-size:14px;color:#cdd6e3;font-family:-apple-system,"PingFang SC",sans-serif}
  .share-bar .share-text strong{color:#fff}
  .share-buttons{display:flex;gap:8px}
  .share-btn{
    width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
    background:rgba(255,255,255,.08);border:1px solid rgba(220,194,138,.25);
    color:var(--gold-300);cursor:pointer;transition:.22s;
  }
  .share-btn:hover{background:linear-gradient(135deg,var(--gold-600),var(--gold-400));color:var(--navy-900);transform:translateY(-2px);border-color:var(--gold-400)}
  .share-btn svg{width:16px;height:16px;fill:currentColor}

  /* 上下篇导航 */
  .article-nav{
    margin-top:36px;display:grid;grid-template-columns:1fr 1fr;gap:14px;
  }
  .article-nav a{
    display:flex;flex-direction:column;gap:6px;padding:18px 20px;
    background:#fff;border:1px solid var(--line);border-radius:14px;
    color:var(--navy-800);transition:.25s;position:relative;overflow:hidden;
  }
  .article-nav a::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
    background:linear-gradient(180deg,var(--gold-500),var(--gold-300));
    transform:scaleY(0);transform-origin:top;transition:transform .3s;
  }
  .article-nav a:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(13,27,46,.1);border-color:var(--gold-400)}
  .article-nav a:hover::before{transform:scaleY(1)}
  .article-nav .nav-label{font-size:11px;color:var(--muted);letter-spacing:1px;text-transform:uppercase;font-family:-apple-system,sans-serif}
  .article-nav .nav-title{font-size:14px;font-weight:600;color:var(--navy-900);line-height:1.5;font-family:-apple-system,"PingFang SC",sans-serif}
  .article-nav .nav-next{text-align:right}
  .article-nav .nav-next::before{left:auto;right:0;transform-origin:bottom}

  /* ===== 侧栏 ===== */
  .article-sidebar{display:flex;flex-direction:column;gap:18px;position:sticky;top:96px}
  /* CTA 二维码卡 - 复用 column.css 的 .aside-card 但局部覆盖 */
  .article-qr-card{
    background:linear-gradient(135deg,var(--navy-800),var(--navy-600));color:#fff;
    border:1px solid var(--gold-500);
    border-radius:18px;padding:22px;position:relative;overflow:hidden;
    box-shadow:0 14px 32px rgba(13,27,46,.2);
  }
  .article-qr-card::after{
    content:"";position:absolute;right:-50px;top:-50px;width:160px;height:160px;border-radius:50%;
    background:rgba(220,194,138,.12);
  }
  .article-qr-card h3{
    margin:0 0 6px;font-size:18px;color:#fff;letter-spacing:.3px;
    font-family:Georgia,"Songti SC",serif;position:relative;z-index:1;
  }
  .article-qr-card p{
    margin:0 0 14px;color:#cdd6e3;font-size:13px;line-height:1.7;
    font-family:-apple-system,"PingFang SC",sans-serif;position:relative;z-index:1;
  }
  .article-qr-card .qr-grid{
    display:grid;grid-template-columns:1fr 1fr;gap:10px;position:relative;z-index:1;margin:0 auto 14px;
  }
  .article-qr-card .qr-item{display:flex;flex-direction:column;align-items:center;gap:6px}
  .article-qr-card .qr-wrap{
    position:relative;z-index:1;width:100%;aspect-ratio:1;
    padding:6px;background:#fff;border-radius:12px;
    border:1px solid var(--line);
    box-shadow:0 8px 22px rgba(0,0,0,.18);
  }
  .article-qr-card .qr-wrap img{display:block;width:100%;height:100%;object-fit:contain;border-radius:6px}
  .article-qr-card .qr-name{
    font-size:12px;font-weight:600;color:var(--gold-300);letter-spacing:.3px;
    font-family:-apple-system,"PingFang SC",sans-serif;
  }
  .article-qr-card .contact-list{
    list-style:none;margin:0;padding:12px 0 0;display:flex;flex-direction:column;gap:8px;
    border-top:1px solid rgba(220,194,138,.2);position:relative;z-index:1;
  }
  .article-qr-card .contact-list li{
    display:flex;justify-content:space-between;align-items:center;font-size:12px;
    font-family:-apple-system,"PingFang SC",sans-serif;
  }
  .article-qr-card .contact-list .c-label{color:#aeb8c6}
  .article-qr-card .contact-list b{color:#fff;font-weight:600}
  .article-qr-card .btn{width:100%;margin-top:6px;position:relative;z-index:1;font-size:13px;min-height:40px}

  /* 相关文章迷你列表 */
  .article-side-card{
    background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;
    box-shadow:0 10px 26px rgba(13,27,46,.05);
  }
  .article-side-card h4{
    margin:0 0 12px;font-size:14px;color:var(--navy-900);
    font-family:Georgia,"Songti SC",serif;letter-spacing:.3px;
    padding-bottom:8px;border-bottom:2px solid var(--gold-500);
  }
  .mini-article-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
  .mini-article-list li a{
    display:block;padding:8px;border-radius:8px;transition:.2s;
  }
  .mini-article-list li a:hover{background:var(--cream)}
  .mini-article-list .mini-thumb{
    flex:none;width:54px;height:40px;border-radius:6px;overflow:hidden;
    background:linear-gradient(135deg,var(--navy-800),var(--navy-600));
  }
  .mini-article-list .mini-thumb img{width:100%;height:100%;object-fit:cover;display:block}
  .mini-article-list .mini-title{
    font-size:13px;line-height:1.5;color:var(--navy-800);
    font-family:-apple-system,"PingFang SC",sans-serif;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .mini-article-list li a:hover .mini-title{color:var(--gold-700)}
  .mini-article-list .mini-head{display:flex;gap:10px;align-items:flex-start}
  .mini-article-list .mini-title{flex:1;min-width:0}
  .mini-article-list .mini-desc{
    margin:6px 0 0;font-size:12px;color:var(--muted);line-height:1.6;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
    overflow:hidden;text-overflow:ellipsis;overflow-wrap:anywhere;
  }

  /* Tag 云（侧栏 Tag 推荐） */
  .tag-cloud{display:flex;flex-wrap:wrap;gap:7px}
  .tag-pill{
    padding:6px 12px;border-radius:999px;background:var(--cream);color:var(--navy-700);
    font-size:12px;font-weight:600;border:1px solid var(--line);
    font-family:-apple-system,"PingFang SC",sans-serif;transition:.22s;
  }
  .tag-pill:hover{
    background:linear-gradient(135deg,var(--gold-600),var(--gold-400));color:var(--navy-900);
    border-color:var(--gold-500);transform:translateY(-2px);box-shadow:0 6px 14px rgba(176,141,87,.28);
  }

  /* ===== 编辑器正文补充（去内联格式后由主题重排） ===== */
  .article-content img{max-width:100%;height:auto;border-radius:12px;margin:8px auto;display:block;
    border:1px solid var(--line);box-shadow:0 14px 32px rgba(13,27,46,.08)}
  .article-content h4{margin:20px 0 10px;font-size:16px;line-height:1.5;color:var(--navy-800);
    font-family:Georgia,"Songti SC",serif;letter-spacing:.2px}
  .article-content hr{border:none;border-top:1px dashed var(--line);margin:26px 0}
  .article-content h2:first-child,.article-content h3:first-child,
  .article-content h4:first-child,.article-content p:first-child{margin-top:0}
  .article-content p:last-child{margin-bottom:0}
  .article-content>*{min-width:0}
  .article-content{overflow-wrap:anywhere}
  /* 移动端防溢出：grid 1fr 列的 item（正文裸 div/侧栏）需 min-width:0，
     否则正文图片 intrinsic 宽度（如 width="539"）会撑开整列超出视口 */
  .article-body-grid>*{min-width:0}
  .article-body-grid>*{max-width:100%}

  /* 正文分页导航 */
  .article-page-nav{
    margin-top:20px;padding:14px 18px;background:var(--paper);
    border:1px solid var(--line);border-radius:12px;
    display:flex;align-items:center;justify-content:center;gap:14px;
    font-family:-apple-system,"PingFang SC",sans-serif;
  }
  .article-page-nav .ap-btn{
    padding:7px 16px;border-radius:999px;border:1px solid var(--gold-400);
    color:var(--gold-700);font-size:13px;font-weight:600;text-decoration:none;transition:.2s;
  }
  .article-page-nav .ap-btn:hover{background:var(--gold-500);color:#fff;border-color:var(--gold-500)}
  .article-page-nav .ap-info{color:var(--muted);font-size:13px;letter-spacing:.5px}

  /* ===== 响应式 ===== */
  @media (max-width:1040px){
    .article-body-grid{grid-template-columns:1fr;gap:30px}
    .article-sidebar{position:static}
  }
  @media (max-width:720px){
    .article-hero{padding:36px 0 30px}
    .article-body-section{padding:36px 0 48px}
    .article-content{padding:24px 20px}
    .article-content h2{font-size:21px}
    .article-content h3{font-size:16px}
    .article-content p{font-size:15px;line-height:1.85}
    .article-nav{grid-template-columns:1fr;gap:10px}
    .article-nav .nav-next{text-align:left}
    .share-bar{flex-direction:column;align-items:flex-start}
  }
  @media (max-width:480px){
    .article-hero h1{font-size:24px}
    .article-tags-top .at-tag{font-size:11px;padding:4px 10px}
    .article-meta-line{font-size:12px;gap:10px}
  }