:root{
      --navy:#071625;
      --navy-2:#0b2033;
      --navy-3:#102a43;
      --red:#d9001b;
      --red-2:#ef2438;
      --ink:#101c27;
      --muted:#667481;
      --line:#e1e7eb;
      --soft:#f4f7f9;
      --soft-2:#eef3f6;
      --white:#fff;
      --max:1380px;
      --article:1080px;
      --ease:cubic-bezier(.2,.75,.25,1);
      --shadow:0 26px 70px rgba(7,22,37,.12);
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:#fff;
      font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{font:inherit}
    .shell{width:min(var(--max),calc(100% - 72px));margin-inline:auto}
    .reading-progress{
      position:fixed;left:0;top:0;z-index:9999;height:3px;width:0;
      background:var(--red);box-shadow:0 0 18px rgba(217,0,27,.45);
    }

    /* HERO */
    .article-hero{
      position:relative;
      min-height:780px;
      display:flex;
      align-items:flex-end;
      color:#fff;
      overflow:hidden;
      background:var(--navy);
      padding:118px 0 78px;
    }
    .article-hero:before{
      content:"";
      position:absolute;inset:0;
      background:
        linear-gradient(90deg,rgba(4,16,29,.98) 0%,rgba(4,16,29,.91) 39%,rgba(4,16,29,.49) 72%,rgba(4,16,29,.66) 100%),
        url('/assets/images/ai-hd/platform-hd.webp') center/cover no-repeat;
      transform:scale(1.02);
    }
    .article-hero:after{
      content:"";
      position:absolute;inset:0;
      pointer-events:none;
      background:
        linear-gradient(rgba(255,255,255,.033) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.033) 1px,transparent 1px);
      background-size:84px 84px;
      mask-image:linear-gradient(to right,#000,transparent 78%);
    }
    .hero-content{position:relative;z-index:2;max-width:1110px}
    .back-link{
      display:inline-flex;align-items:center;gap:11px;
      color:rgba(255,255,255,.62);
      font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.14em;
      margin-bottom:48px;transition:.25s;
    }
    .back-link:hover{color:#fff}
    .back-link svg{width:16px;height:16px}
    .article-category{
      display:flex;align-items:center;gap:13px;
      color:#ff7380;font-size:11px;font-weight:850;
      text-transform:uppercase;letter-spacing:.2em;
    }
    .article-category:before{content:"";width:39px;height:2px;background:var(--red)}
    .article-hero h1{
      margin:24px 0 28px;
      max-width:1080px;
      font-size:clamp(50px,6.4vw,92px);
      line-height:.98;
      letter-spacing:-.055em;
      font-weight:700;
    }
    .hero-lead{
      max-width:800px;margin:0;
      font-size:17px;line-height:1.8;color:rgba(255,255,255,.7);
    }
    .article-meta{
      margin-top:38px;
      display:flex;align-items:center;gap:18px;flex-wrap:wrap;
      color:rgba(255,255,255,.55);
      font-size:11px;font-weight:760;text-transform:uppercase;letter-spacing:.11em;
    }
    .article-meta .dot{width:4px;height:4px;background:var(--red);border-radius:50%}
    .hero-no{
      position:absolute;right:6px;bottom:-22px;
      font-size:170px;line-height:.8;font-weight:850;letter-spacing:-.07em;
      color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.12);
      user-select:none;
    }

    /* INTRO */
    .article-intro{
      position:relative;
      z-index:5;
      margin-top:-1px;
      background:#fff;
    }
    .intro-grid{
      display:grid;
      grid-template-columns:220px minmax(0,790px) minmax(250px,1fr);
      gap:58px;
      align-items:start;
      padding:82px 0 64px;
    }
    .intro-label{
      color:#8a98a3;font-size:10px;font-weight:850;text-transform:uppercase;letter-spacing:.18em;
      padding-top:8px;
    }
    .intro-copy{
      font-size:26px;
      line-height:1.48;
      letter-spacing:-.025em;
      font-weight:560;
      margin:0;
      color:#172633;
    }
    .intro-copy strong{font-weight:730;color:var(--navy)}
    .intro-side{
      border-left:1px solid var(--line);
      padding-left:30px;
    }
    .intro-side span{display:block;color:#98a4ad;font-size:10px;text-transform:uppercase;letter-spacing:.17em;font-weight:850;margin-bottom:12px}
    .intro-side p{margin:0;color:var(--muted);font-size:13px;line-height:1.75}

    /* ARTICLE */
    .article-wrap{
      background:#fff;
      padding-bottom:110px;
    }
    .article-grid{
      display:grid;
      grid-template-columns:220px minmax(0,var(--article));
      gap:58px;
      align-items:start;
      justify-content:center;
    }
    .toc{
      position:sticky;top:34px;
      padding-top:34px;
    }
    .toc-title{
      margin-bottom:22px;
      font-size:10px;font-weight:850;text-transform:uppercase;letter-spacing:.18em;color:#97a3ad;
    }
    .toc nav{display:grid}
    .toc a{
      position:relative;
      padding:11px 0 11px 18px;
      color:#7b8994;
      font-size:12px;line-height:1.45;font-weight:650;
      border-left:1px solid #d8e0e5;
      transition:.25s;
    }
    .toc a:hover,.toc a.active{color:var(--navy)}
    .toc a.active:before{
      content:"";position:absolute;left:-1px;top:0;bottom:0;width:2px;background:var(--red);
    }
    .toc-back{
      display:inline-flex;align-items:center;gap:8px;margin-top:26px;
      color:var(--red);font-size:10px;font-weight:850;text-transform:uppercase;letter-spacing:.12em;
    }

    .article-body{
      background:#fff;
      padding:54px 70px 72px;
      min-width:0;
    }
    .article-body section{scroll-margin-top:36px}
    .article-body h2{
      margin:58px 0 18px;
      font-size:clamp(30px,2.6vw,40px);
      line-height:1.08;
      letter-spacing:-.04em;
      font-weight:700;
      color:var(--navy);
    }
    .article-body section:first-child h2{margin-top:0}
    .article-body h3{
      margin:30px 0 12px;
      font-size:21px;line-height:1.25;letter-spacing:-.02em;color:#142532;
    }
    .article-body p{
      margin:0 0 22px;
      color:#52626f;
      font-size:16px;
      line-height:1.85;
    }
    .article-body strong{color:#243542}
    .article-body ul{
      margin:20px 0 30px;
      padding:0;
      list-style:none;
    }
    .article-body li{
      position:relative;
      padding-left:20px;
      margin:0 0 10px;
      color:#51616e;
      font-size:15px;
      line-height:1.72;
    }
    .article-body li:before{
      content:"";
      position:absolute;
      left:0;
      top:.72em;
      width:5px;
      height:5px;
      border-radius:50%;
      background:var(--red);
    }
    .section-no{
      margin-bottom:10px;
      color:#8b98a2;
      font-size:10px;
      font-weight:700;
      text-transform:uppercase;
      letter-spacing:.1em;
    }

    .wide-image{
      margin:30px 0 38px;
    }
    .wide-image img{
      width:100%;
      height:auto;
      object-fit:cover;
    }
    .image-caption{
      margin-top:8px;
      color:#8a97a1;
      font-size:10px;
      line-height:1.5;
    }

    .key-box{
      margin:24px 0 30px;
      padding:0;
      background:transparent;
      border:0;
      color:inherit;
    }
    .key-box .label{
      margin-bottom:8px;
      color:#8b98a2;
      font-size:10px;
      font-weight:700;
      text-transform:uppercase;
      letter-spacing:.08em;
    }
    .key-box strong{
      display:block;
      color:#243542;
      font-size:16px;
      line-height:1.7;
      font-weight:700;
    }
    .key-box p{
      margin:8px 0 0;
      color:#52626f;
      font-size:16px;
      line-height:1.85;
    }

    .spec-table{
      margin:28px 0 36px;
    }
    .spec-row{
      display:grid;
      grid-template-columns:190px 1fr;
      gap:24px;
      padding:14px 0;
      border-bottom:1px solid #e6ebee;
    }
    .spec-row strong{
      color:#243542;
      font-size:14px;
      font-weight:700;
    }
    .spec-row span{
      color:#52626f;
      font-size:14px;
      line-height:1.7;
    }

    .quote{
      margin:28px 0;
      padding:0;
      border:0;
      background:transparent;
      color:#52626f;
      font-size:16px;
      line-height:1.85;
      font-weight:400;
    }

    /* CHECKLIST */

    /* CHECKLIST */
    .checklist{
      margin:28px 0 34px;
      padding:0;
      border:0;
      background:transparent;
    }
    .checklist-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:12px;
    }
    .checklist-head h3{margin:0}
    .checklist-head span{
      color:#8b98a2;
      font-size:10px;
      font-weight:700;
      text-transform:uppercase;
      letter-spacing:.08em;
    }
    .check-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:0 28px;
    }
    .check-item{
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding:10px 0;
      color:#52626f;
      font-size:14px;
      line-height:1.65;
    }
    .check-icon{
      flex:0 0 auto;
      width:auto;
      height:auto;
      border-radius:0;
      background:transparent;
      color:var(--red);
      font-size:11px;
      font-weight:700;
      line-height:1.65;
    }

    /* BOTTOM ARTICLE CTA */
    .article-cta{
      margin-top:42px;
      padding-top:28px;
      border-top:1px solid #e3e8eb;
      background:transparent;
      color:var(--ink);
    }
    .article-cta .kicker{
      margin-bottom:10px;
      color:#8b98a2;
      font-size:10px;
      font-weight:700;
      text-transform:uppercase;
      letter-spacing:.08em;
    }
    .article-cta h3{
      color:var(--navy);
      margin:0 0 10px;
      max-width:700px;
    }
    .article-cta p{
      color:#52626f;
      font-size:15px;
      line-height:1.75;
      max-width:700px;
      margin:0;
    }
    .article-cta a{
      display:inline-flex;
      align-items:center;
      gap:10px;
      margin-top:18px;
      color:var(--red);
      font-size:11px;
      font-weight:800;
      text-transform:uppercase;
      letter-spacing:.08em;
    }
    .article-cta a:hover{color:var(--red-2)}
    .article-cta svg{width:15px;height:15px}

    /* NEXT PREV */
    .article-nav{
      display:grid;grid-template-columns:1fr 1fr;
      background:#fff;
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
    }
    .article-nav a{
      min-height:220px;padding:42px max(36px,calc((100vw - 1380px)/2));
      display:flex;flex-direction:column;justify-content:center;
      transition:.35s var(--ease);
    }
    .article-nav a:first-child{border-right:1px solid var(--line);align-items:flex-end;text-align:right}
    .article-nav a:hover{background:var(--navy);color:#fff}
    .article-nav small{
      color:#9aa5ad;font-size:9px;font-weight:850;text-transform:uppercase;letter-spacing:.16em;margin-bottom:13px;
    }
    .article-nav strong{
      max-width:490px;font-size:25px;line-height:1.2;letter-spacing:-.025em;
    }
    .article-nav a:hover small{color:#ff7380}

    /* RELATED */
    .related{padding:96px 0 108px;background:#fff}
    .related-head{
      display:flex;justify-content:space-between;align-items:flex-end;gap:35px;margin-bottom:40px;
    }
    .related-kicker{font-size:10px;color:var(--red);text-transform:uppercase;letter-spacing:.18em;font-weight:850;margin-bottom:12px}
    .related h2{font-size:clamp(38px,4vw,58px);line-height:1;letter-spacing:-.045em;margin:0}
    .all-news{
      display:inline-flex;align-items:center;gap:10px;
      font-size:10px;font-weight:850;text-transform:uppercase;letter-spacing:.12em;color:#667581;
    }
    .all-news:hover{color:var(--red)}
    .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .related-card{
      border:1px solid #e1e7eb;background:#fff;overflow:hidden;transition:.35s var(--ease);
    }
    .related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
    .related-img{display:block;height:180px;overflow:hidden;background:#e8edf0}
    .related-img img{width:100%;height:100%;object-fit:cover;transition:.6s var(--ease)}
    .related-card:hover img{transform:scale(1.055)}
    .related-copy{padding:26px 25px 29px}
    .related-meta{font-size:9px;color:#8c99a3;text-transform:uppercase;letter-spacing:.12em;font-weight:800;margin-bottom:13px}
    .related-copy h3{margin:0;font-size:22px;line-height:1.25;letter-spacing:-.025em}
    .read-more{
      display:inline-flex;align-items:center;gap:9px;margin-top:19px;color:var(--red);
      font-size:9px;font-weight:850;text-transform:uppercase;letter-spacing:.11em;
    }

    /* REVEAL */
    .reveal{opacity:0;transform:translateY(22px);transition:opacity .75s var(--ease),transform .75s var(--ease)}
    .reveal.in{opacity:1;transform:none}

    @media(max-width:1180px){
      .intro-grid{grid-template-columns:170px minmax(0,1fr) 245px;gap:36px}
      .article-grid{grid-template-columns:170px minmax(0,1fr);gap:36px}
      .article-body{padding:58px 64px 72px}
      .wide-image{margin-left:-64px;margin-right:-64px}
      .hero-no{font-size:130px}
    }

    @media(max-width:960px){
      .shell{width:min(var(--max),calc(100% - 40px))}
      .article-hero{min-height:700px;padding:100px 0 60px}
      .hero-no{display:none}
      .intro-grid{grid-template-columns:1fr;gap:18px;padding:60px 0}
      .intro-label{padding:0}
      .intro-side{border-left:0;border-top:1px solid var(--line);padding:24px 0 0}
      .article-grid{grid-template-columns:1fr;gap:0}
      .toc{display:none}
      .article-body{max-width:980px;margin-inline:auto}
      .article-wrap{background:var(--soft);padding-top:0}
      .article-nav a{padding:36px 28px}
      .related-grid{grid-template-columns:1fr 1fr}
      .related-card:last-child{grid-column:1/3}
    }

    @media(max-width:640px){
      .shell{width:calc(100% - 30px)}
      .article-hero{min-height:630px;padding:82px 0 48px}
      .back-link{margin-bottom:34px}
      .article-hero h1{font-size:44px;line-height:1.01}
      .hero-lead{font-size:14px;line-height:1.72}
      .article-meta{gap:10px;font-size:9px}
      .intro-copy{font-size:21px}
      .article-body{padding:34px 20px 46px}
      .article-body h2{font-size:32px;margin-top:56px}
      .article-body p{font-size:15px;line-height:1.82}
      .wide-image{margin:28px 0 34px;min-height:0}
      .wide-image img{height:auto;max-height:360px}
      
      
      .spec-row{grid-template-columns:1fr;gap:7px}
      
      
      .check-grid{grid-template-columns:1fr}
      
      
      .article-nav{grid-template-columns:1fr}
      .article-nav a{min-height:165px}
      .article-nav a:first-child{border-right:0;border-bottom:1px solid var(--line);align-items:flex-start;text-align:left}
      .related{padding:72px 0 82px}
      .related-head{display:block}
      .all-news{margin-top:20px}
      .related-grid{grid-template-columns:1fr}
      .related-card:last-child{grid-column:auto}
      .related-img{height:170px}
    }

/* ===== 正文（含后台上传 / 导入工具写入的富文本）兜底 ===== */
.article-body.rte h2{scroll-margin-top:120px}
.article-body.rte h3,.article-body.rte h4{scroll-margin-top:120px}
.article-body.rte h3{margin:36px 0 12px}
.article-body.rte h4{margin:28px 0 10px;color:var(--navy);font-size:16px;font-weight:800;line-height:1.45}
.article-body.rte img{width:auto;max-width:100%;height:auto;margin:26px 0;border-radius:16px}
.article-body.rte > .rte-body > p:first-child{font-size:17px;color:#38495a}
.article-body.rte a{color:var(--red);text-decoration:underline;text-underline-offset:3px}
.article-body.rte a:hover{color:#a30014}
.article-body.rte blockquote{margin:28px 0;padding:20px 24px;border-left:3px solid var(--red);background:var(--soft);border-radius:0 14px 14px 0;color:#38495a;font-size:15px;line-height:1.8}
.article-body.rte ol{list-style:decimal;margin:20px 0;padding-left:24px;color:#51616e}
.article-body.rte ol>li{padding-left:0;font-size:15px;line-height:1.72;margin:0 0 10px}
.article-body.rte ol>li:before{display:none}
.article-body.rte table{width:100%;border-collapse:collapse;margin:28px 0;font-size:14px}
.article-body.rte th,.article-body.rte td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top;line-height:1.6}
.article-body.rte th{background:var(--soft);color:var(--navy);font-weight:800}
.article-body.rte figure{margin:28px 0}
.article-body.rte figcaption,.article-body.rte .image-caption{margin-top:10px;color:var(--muted);font-size:13px;line-height:1.6}
.article-body.rte iframe{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:16/9;margin:28px 0;border:0;border-radius:16px}
.article-body.rte video{width:100%;max-width:100%;height:auto;margin:28px 0;border-radius:16px}
.article-body.rte hr{margin:36px 0;border:0;border-top:1px solid var(--line)}
.article-body.rte pre{overflow-x:auto;margin:26px 0;padding:18px 20px;background:var(--navy);color:#e6edf3;border-radius:14px;font-size:13px;line-height:1.7}
.article-body.rte code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.article-body.rte .rte-empty{padding:20px 0 8px;color:var(--muted);font-size:15px}

/* 上一篇 / 下一篇缺一个时的占位，保持两列网格不塌 */
.article-nav .article-nav-empty{display:block;min-height:120px}

/* 目录项过多时可滚动 */
.toc nav{max-height:60vh;overflow-y:auto}
.toc a{cursor:pointer}