#visualization-diagram{
      --bg:#f7f9fc;
      --surface:#ffffff;
      --surface-soft:#f3f6fa;
      --text:#162334;
      --muted:#6e7c8e;
      --line:#d9e1ea;

      --blue:#1768d2;
      --blue-soft:#eaf3ff;

      --green:#169b67;
      --green-soft:#eaf8f2;

      --orange:#e58a18;
      --orange-soft:#fff4e5;

      --purple:#7256c8;
      --purple-soft:#f2effd;

      --red:#c9473a;
      --red-soft:#fff0ee;

      --shadow:0 12px 30px rgba(27,43,68,.08);
    }

    #visualization-diagram, #visualization-diagram *{box-sizing:border-box}

    #visualization-diagram{
      margin:0;
      background:var(--bg);
      color:var(--text);
      font-family:
        "Pretendard","Noto Sans KR","Apple SD Gothic Neo",
        "Malgun Gothic",Arial,sans-serif;
    }

    .visualization-section{
      width:100%;
      padding:72px 32px;
      background:
        radial-gradient(circle at 10% 18%, rgba(23,104,210,.06), transparent 26%),
        radial-gradient(circle at 88% 82%, rgba(114,86,200,.05), transparent 26%),
        var(--bg);
    }

    .visualization-inner{
      max-width:1480px;
      margin:0 auto;
    }

    #visualization-diagram .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:9px;
      margin-bottom:14px;
      color:var(--blue);
      font-size:13px;
      font-weight:800;
      letter-spacing:.12em;
      text-transform:uppercase;
    }

    #visualization-diagram .eyebrow::before{
      content:"";
      width:30px;
      height:2px;
      background:var(--blue);
    }

    #visualization-diagram h1{
      margin:0;
      font-size:40px;
      line-height:1.2;
      letter-spacing:-.04em;
    }

    .lead{
      max-width:930px;
      margin:16px 0 0;
      color:var(--muted);
      font-size:17px;
      line-height:1.8;
      word-break:keep-all;
    }

    /*
     * 전체 흐름
     *
     * 데이터 소스
     *    ↓
     * 통합 데이터 분석 / 가공
     *    ↓
     * 시각화 엔진
     *    ↓
     * 사용자 맞춤형 화면
     */
    .diagram{
      margin-top:48px;
      display:grid;
      grid-template-columns:
        minmax(260px,1fr)
        74px
        minmax(300px,1.14fr)
        74px
        minmax(340px,1.22fr)
        74px
        minmax(260px,1fr);
      align-items:center;
      position:relative;
      min-width:0;
    }

    /* -------------------------------------------------------
       공통 카드
    ------------------------------------------------------- */
    .panel{
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:22px;
      box-shadow:var(--shadow);
      min-width:0;
    }

    .panel-label{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:6px 10px;
      margin-bottom:13px;
      border-radius:999px;
      background:var(--blue-soft);
      color:var(--blue);
      font-size:10px;
      font-weight:900;
      letter-spacing:.07em;
    }

    .panel h3{
      margin:0;
      font-size:20px;
      line-height:1.3;
    }

    .panel-description{
      margin:9px 0 0;
      color:var(--muted);
      font-size:12px;
      line-height:1.65;
      word-break:keep-all;
    }

    /* -------------------------------------------------------
       1. 데이터 소스
    ------------------------------------------------------- */
    .source-zone{
      display:grid;
      gap:12px;
    }

    .source-title{
      margin-bottom:4px;
      padding:0 2px;
    }

    .source-title strong{
      display:block;
      font-size:15px;
      margin-bottom:4px;
    }

    .source-title span{
      color:var(--muted);
      font-size:11px;
    }

    .source-card{
      display:grid;
      grid-template-columns:46px 1fr;
      gap:12px;
      align-items:center;
      min-height:78px;
      padding:13px 14px;
      border:1px solid var(--line);
      border-radius:15px;
      background:var(--surface);
      box-shadow:0 6px 18px rgba(26,42,67,.045);
    }

    .source-card strong{
      display:block;
      margin-bottom:4px;
      font-size:14px;
    }

    .source-card span{
      display:block;
      color:var(--muted);
      font-size:11px;
      line-height:1.5;
    }

    .source-icon{
      width:46px;
      height:46px;
      border-radius:13px;
      display:grid;
      place-items:center;
      position:relative;
      background:var(--blue-soft);
      color:var(--blue);
    }

    .source-icon::before,
    .source-icon::after{
      content:"";
      position:absolute;
    }

    /* 수집 서버 */
    .icon-server::before{
      width:27px;
      height:28px;
      border:2px solid currentColor;
      border-radius:4px;
      background:
        linear-gradient(currentColor,currentColor) 5px 7px/17px 2px no-repeat,
        linear-gradient(currentColor,currentColor) 5px 14px/17px 2px no-repeat,
        linear-gradient(currentColor,currentColor) 5px 21px/17px 2px no-repeat;
    }

    .icon-server::after{
      width:3px;
      height:3px;
      border-radius:50%;
      background:var(--green);
      right:11px;
      top:15px;
      box-shadow:0 7px 0 var(--green),0 14px 0 var(--green);
    }

    /* DB */
    .icon-db{
      background:var(--green-soft);
      color:var(--green);
    }

    .icon-db::before{
      width:27px;
      height:10px;
      border:2px solid currentColor;
      border-radius:50%;
      top:8px;
    }

    .icon-db::after{
      width:27px;
      height:23px;
      border-left:2px solid currentColor;
      border-right:2px solid currentColor;
      border-bottom:2px solid currentColor;
      border-radius:0 0 50% 50% / 0 0 28% 28%;
      top:14px;
    }

    /* 외부 시스템 */
    .icon-api{
      background:var(--orange-soft);
      color:var(--orange);
      font-size:12px;
      font-weight:900;
    }

    .icon-api::before{
      content:"API";
      position:static;
    }

    /* 비정형 */
    .icon-log{
      background:var(--purple-soft);
      color:var(--purple);
    }

    .icon-log::before{
      width:24px;
      height:29px;
      border:2px solid currentColor;
      border-radius:4px;
      background:
        linear-gradient(currentColor,currentColor) 5px 7px/14px 2px no-repeat,
        linear-gradient(currentColor,currentColor) 5px 13px/11px 2px no-repeat,
        linear-gradient(currentColor,currentColor) 5px 19px/14px 2px no-repeat;
    }

    /* -------------------------------------------------------
       공통 화살표
    ------------------------------------------------------- */
    .flow-arrow{
      position:relative;
      height:2px;
      margin:0 14px;
      background:linear-gradient(90deg,rgba(23,104,210,.24),var(--blue));
    }

    .flow-arrow::after{
      content:"";
      position:absolute;
      right:-1px;
      top:50%;
      transform:translateY(-50%);
      border-top:6px solid transparent;
      border-bottom:6px solid transparent;
      border-left:9px solid var(--blue);
    }

    /* -------------------------------------------------------
       2. 데이터 분석 / 가공
    ------------------------------------------------------- */
    .processing-panel{
      position:relative;
      padding:25px 22px;
      overflow:hidden;
      background:
        linear-gradient(180deg,#fff 0%,#f7f9fc 100%);
    }

    .processing-panel::before{
      content:"";
      position:absolute;
      top:0;
      left:0;
      width:100%;
      height:8px;
      background:linear-gradient(90deg,var(--blue),#4b7ee8);
    }

    .processing-symbol{
      width:74px;
      height:74px;
      margin:5px auto 18px;
      border-radius:21px;
      background:var(--blue-soft);
      color:var(--blue);
      position:relative;
    }

    .processing-symbol::before{
      content:"";
      position:absolute;
      left:17px;
      top:17px;
      width:10px;
      height:10px;
      border:3px solid currentColor;
      border-radius:50%;
      box-shadow:
        28px 0 0 -3px var(--blue-soft),
        28px 0 0 0 currentColor,
        0 28px 0 -3px var(--blue-soft),
        0 28px 0 0 currentColor,
        28px 28px 0 -3px var(--blue-soft),
        28px 28px 0 0 currentColor;
    }

    .processing-symbol::after{
      content:"";
      position:absolute;
      left:27px;
      top:25px;
      width:22px;
      height:22px;
      border-left:2px solid currentColor;
      border-top:2px solid currentColor;
      transform:rotate(45deg);
    }

    .processing-panel h3,
    .visual-panel h3,
    .user-panel h3{
      text-align:center;
    }

    .processing-panel .panel-description,
    .visual-panel .panel-description,
    .user-panel .panel-description{
      text-align:center;
    }

    .process-list{
      margin:21px 0 0;
      padding:0;
      list-style:none;
      display:grid;
      gap:9px;
    }

    .process-list li{
      display:flex;
      align-items:center;
      gap:10px;
      padding:10px 11px;
      border:1px solid #e5eaf0;
      border-radius:10px;
      background:#fff;
      color:#405165;
      font-size:12px;
      line-height:1.4;
    }

    .process-list b{
      display:grid;
      place-items:center;
      width:23px;
      height:23px;
      flex:0 0 23px;
      border-radius:50%;
      background:var(--blue-soft);
      color:var(--blue);
      font-size:10px;
    }

    /* -------------------------------------------------------
       3. 시각화 엔진
    ------------------------------------------------------- */
    .visual-panel{
      position:relative;
      padding:24px 20px;
      overflow:hidden;
    }

    .visual-panel::before{
      content:"";
      position:absolute;
      top:0;
      left:0;
      width:100%;
      height:8px;
      background:linear-gradient(90deg,var(--purple),#9277df);
    }

    .visual-panel .panel-label{
      background:var(--purple-soft);
      color:var(--purple);
    }

    .visual-grid{
      margin-top:20px;
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:11px;
    }

    .visual-item{
      min-height:122px;
      padding:12px;
      border:1px solid #e4e8ef;
      border-radius:13px;
      background:#fff;
      display:flex;
      flex-direction:column;
      justify-content:space-between;
      overflow:hidden;
    }

    .visual-item strong{
      font-size:12px;
      color:#3d4d60;
    }

    .visual-item small{
      color:var(--muted);
      font-size:9px;
      line-height:1.35;
    }

    /* 차트 미니어처 */
    .mini-bar{
      height:55px;
      display:flex;
      align-items:flex-end;
      gap:6px;
      padding:3px 3px 0;
    }

    .mini-bar i{
      flex:1;
      display:block;
      border-radius:4px 4px 0 0;
      background:var(--blue);
      opacity:.82;
    }

    .mini-bar i:nth-child(1){height:25%}
    .mini-bar i:nth-child(2){height:52%}
    .mini-bar i:nth-child(3){height:38%}
    .mini-bar i:nth-child(4){height:78%}
    .mini-bar i:nth-child(5){height:60%}

    .mini-line{
      position:relative;
      height:55px;
      overflow:hidden;
    }

    .mini-line::before{
      content:"";
      position:absolute;
      left:4px;
      right:4px;
      top:29px;
      height:2px;
      background:var(--green);
      transform:skewY(-16deg);
      box-shadow:
        17px -8px 0 -0.5px var(--green),
        35px 3px 0 -0.5px var(--green),
        52px -12px 0 -0.5px var(--green);
    }

    .mini-line::after{
      content:"";
      position:absolute;
      inset:7px 4px 5px;
      border-left:1px solid #dfe5ec;
      border-bottom:1px solid #dfe5ec;
    }

    .mini-map{
      position:relative;
      height:55px;
      border-radius:9px;
      background:
        linear-gradient(135deg,#f0f3f7 25%,transparent 25%) 0 0/18px 18px,
        linear-gradient(315deg,#f0f3f7 25%,#fff 25%) 0 0/18px 18px;
      border:1px solid #e1e6ec;
    }

    .mini-map::before,
    .mini-map::after{
      content:"";
      position:absolute;
      width:9px;
      height:9px;
      border-radius:50% 50% 50% 0;
      background:var(--red);
      transform:rotate(-45deg);
    }

    .mini-map::before{
      left:25%;
      top:15px;
    }

    .mini-map::after{
      right:24%;
      top:29px;
      background:var(--blue);
    }

    .mini-status{
      height:55px;
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:6px;
      align-items:center;
    }

    .mini-status span{
      height:34px;
      border-radius:8px;
      border:1px solid #e1e6ec;
      position:relative;
      background:#fafbfd;
    }

    .mini-status span::before{
      content:"";
      position:absolute;
      width:8px;
      height:8px;
      border-radius:50%;
      left:50%;
      top:8px;
      transform:translateX(-50%);
      background:var(--green);
    }

    .mini-status span:nth-child(2)::before{
      background:var(--orange);
    }

    .mini-status span:nth-child(3)::before{
      background:var(--red);
    }

    .mini-dashboard{
      height:55px;
      display:grid;
      grid-template-columns:1.1fr .9fr;
      grid-template-rows:1fr 1fr;
      gap:5px;
    }

    .mini-dashboard span{
      display:block;
      border:1px solid #e1e6ec;
      border-radius:6px;
      background:#f8fafc;
    }

    .mini-dashboard span:first-child{
      grid-row:1 / 3;
      background:
        linear-gradient(180deg,transparent 75%,rgba(23,104,210,.12) 75%),
        #f8fafc;
    }

    .mini-gauge{
      height:55px;
      display:flex;
      justify-content:center;
      align-items:flex-end;
    }

    .mini-gauge span{
      width:68px;
      height:34px;
      border:9px solid var(--purple);
      border-bottom:0;
      border-radius:68px 68px 0 0;
      position:relative;
      opacity:.85;
    }

    .mini-gauge span::after{
      content:"";
      position:absolute;
      left:50%;
      bottom:-2px;
      width:3px;
      height:25px;
      background:#405165;
      transform-origin:bottom;
      transform:translateX(-50%) rotate(35deg);
    }

    /* -------------------------------------------------------
       4. 사용자 맞춤 화면
    ------------------------------------------------------- */
    .user-panel{
      padding:24px 18px;
      position:relative;
      overflow:hidden;
      background:
        linear-gradient(180deg,#fff 0%,#f8fafc 100%);
    }

    .user-panel::before{
      content:"";
      position:absolute;
      left:0;
      top:0;
      width:100%;
      height:8px;
      background:linear-gradient(90deg,var(--green),#47b789);
    }

    .user-panel .panel-label{
      background:var(--green-soft);
      color:var(--green);
    }

    .user-list{
      display:grid;
      gap:10px;
      margin-top:20px;
    }

    .user-card{
      display:grid;
      grid-template-columns:42px 1fr;
      gap:11px;
      align-items:center;
      padding:12px;
      border:1px solid #e4e9ef;
      border-radius:12px;
      background:#fff;
    }

    .user-icon{
      width:42px;
      height:42px;
      border-radius:12px;
      display:grid;
      place-items:center;
      position:relative;
      background:var(--green-soft);
      color:var(--green);
    }

    .user-icon::before{
      content:"";
      width:12px;
      height:12px;
      border:2px solid currentColor;
      border-radius:50%;
      position:absolute;
      top:8px;
    }

    .user-icon::after{
      content:"";
      width:20px;
      height:10px;
      border:2px solid currentColor;
      border-bottom:0;
      border-radius:12px 12px 0 0;
      position:absolute;
      bottom:7px;
    }

    .user-card:nth-child(2) .user-icon{
      background:var(--blue-soft);
      color:var(--blue);
    }

    .user-card:nth-child(3) .user-icon{
      background:var(--orange-soft);
      color:var(--orange);
    }

    .user-card:nth-child(4) .user-icon{
      background:var(--purple-soft);
      color:var(--purple);
    }

    .user-card strong{
      display:block;
      margin-bottom:4px;
      font-size:13px;
    }

    .user-card span{
      display:block;
      color:var(--muted);
      font-size:10px;
      line-height:1.45;
    }

    /* -------------------------------------------------------
       핵심 가치 요약
    ------------------------------------------------------- */
    .summary{
      margin-top:40px;
      display:grid;
      grid-template-columns:repeat(5,1fr);
      border:1px solid var(--line);
      border-radius:18px;
      overflow:hidden;
      background:var(--surface);
    }

    .summary-item{
      padding:20px 22px;
      border-right:1px solid var(--line);
    }

    .summary-item:last-child{
      border-right:0;
    }

    .summary-item b{
      display:block;
      margin-bottom:7px;
      color:var(--blue);
      font-size:13px;
    }

    .summary-item span{
      color:var(--muted);
      font-size:12px;
      line-height:1.6;
    }

    /* -------------------------------------------------------
       반응형
    ------------------------------------------------------- */
    @media(max-width:1220px){
      .diagram{
        grid-template-columns:1fr;
        gap:20px;
        max-width:760px;
        margin-left:auto;
        margin-right:auto;
      }

      .flow-arrow{
        width:2px;
        height:46px;
        margin:0 auto;
        background:linear-gradient(180deg,rgba(23,104,210,.24),var(--blue));
      }

      .flow-arrow::after{
        right:50%;
        top:auto;
        bottom:-1px;
        transform:translateX(50%);
        border-left:6px solid transparent;
        border-right:6px solid transparent;
        border-top:9px solid var(--blue);
        border-bottom:0;
      }

      .source-zone{
        grid-template-columns:repeat(2,minmax(0,1fr));
      }

      .source-title{
        grid-column:1 / -1;
      }

      .summary{
        grid-template-columns:repeat(2,1fr);
      }

      .summary-item{
        border-bottom:1px solid var(--line);
      }

      .summary-item:nth-child(2n){
        border-right:0;
      }

      .summary-item:last-child{
        grid-column:1 / -1;
        border-bottom:0;
      }
    }

    @media(max-width:700px){
      .visualization-section{
        padding:48px 18px;
      }

      #visualization-diagram h1{
        font-size:30px;
      }

      .lead{
        font-size:15px;
      }

      .diagram{
        margin-top:34px;
      }

      .source-zone{
        grid-template-columns:1fr;
      }

      .visual-grid{
        grid-template-columns:1fr;
      }

      .summary{
        grid-template-columns:1fr;
      }

      .summary-item{
        border-right:0;
        border-bottom:1px solid var(--line);
      }

      .summary-item:last-child{
        grid-column:auto;
      }
    }