/* IcoMoon 設定 */
        @font-face {
          font-family: 'icomoon';
          src: url('/flow/fonts/icomoon.eot?v1');
          src: url('/flow/fonts/icomoon.ttf?v1') format('truetype');
          font-weight: normal;
          font-style: normal;
        }
        [class^="icon-"], [class*=" icon-"] {
          font-family: 'icomoon' !important;
          font-style: normal;
          font-weight: normal;
          line-height: 1;
          display: inline-block;
          -webkit-font-smoothing: antialiased;
        }
        .icon-mail:before { content: "\e900"; }
        .icon-edit:before { content: "\e901"; }
        .icon-headphones:before { content: "\e902"; }

        :root {
            --dark-blue: #4A62A8;
            --text-color: #333;
            --bg-gray: #f4f4f4;
            --accent-red: #d00;
        }

        .container {
            max-width: 850px;
            margin: 0 auto;
            padding: 20px;
        }

        /* ステップフロー */
        .step-flow {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 15px;
            margin-bottom: 40px;
            padding: 20px;
            background-color: #fff;
            border: 1px solid #eee;
        }
        .step-item { text-align: center; width: 100%; }
        .step-label { display: block; font-weight: bold; font-size: 14px; margin-bottom: 5px; }
        .icon-box {
            border: 2px solid #662F7A;
            border-radius: 12px;
            width: 80px;
            height: 80px;
            margin: 0 auto 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .icon-box i { font-size: 40px; color: #662F7A; }
        .step-name { font-weight: bold; font-size: 15px; }
        .arrows { font-size: 20px; color: #662F7A; transform: rotate(90deg); }

        /* セクション・見出し */
        h3 {
            color: var(--text-color);
            border-bottom: 2px solid #662F7A;
            padding: 10px 0;
            font-size: 1.2em;
            margin: 40px 0 20px;
        }
        .step-desc { margin-bottom: 20px; padding-left: 0; list-style: none; }
        .step-desc li::before { content: "・"; }

        /* スクリーンショットエリア */
        .screenshot-container {
            margin: 20px 0 40px;
            text-align: center;
        }
        .screenshot {
            max-width: 90%;
            height: auto;
            margin-bottom: 10px;
            margin-top: 30px;
        }
        .caption {
            font-size: 0.9em;
            color: #d00;
            text-align: left;
            margin-bottom: 20px;
            background: #fff;
            padding: 10px;
            border-left: 4px solid #d00;
        }

        .alert-box {
            background: #fff4f4;
            border: 1px solid #ffcccc;
            padding: 15px;
            margin: 20px 0;
        }
        .alert-box strong { color: var(--accent-red); }

        .foot_buttons img{
            width: 100%;
            height: auto;
        }
        .step-desc a {
            position: relative;
            font-weight: bold;
            margin-right: 20px;
        }
        .step-desc a::after {
            content: "";
            position: absolute;
            right: -23px;
            top: 50%;
            background: url(/assets/img/icon_external_link.png) no-repeat;
            width: 12px;
            height: 12px;
            transform: translateY(-50%) translateX(-50%);
        }

        /* レスポンシブ設定 (768px以上) */
        @media (min-width: 768px) {
            body { padding: 40px 20px; }
            .container { padding: 40px; }
            .step-flow { flex-direction: row; justify-content: space-around; }
            .step-item { width: auto; }
            .icon-box { width: 100px; height: 100px; }
            .icon-box i { font-size: 50px; }
            .arrows { transform: rotate(0deg); }
            .screenshot {max-width: 100%;}
        }