:root{
        /* ==================================
         * Theme: foreground / typography
         * ================================== */
        --bg0:#050608;
        --bg1:#0b0f14;
        --text:#e8e8ea;
        --text-muted: rgba(255,255,255,0.55);
        --accent: rgba(255,180,90,0.8);
        --font-main: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", "Times New Roman", serif;

        /* ==================================
         * Theme: background (edit here)
         * ================================== */
        --bg-base: linear-gradient(180deg, var(--bg0) 0%, var(--bg1) 100%);
        --bg-mask: linear-gradient(to bottom, black 0%, black 60%, transparent 100%);
        --hero-bg:
          radial-gradient(ellipse 1000px 600px at 60% 35%, rgba(255,255,255,0.05), transparent 70%),
          radial-gradient(ellipse 600px 400px at 70% 25%, rgba(255,180,90,0.03), transparent 60%);
        --section-mission-bg: linear-gradient(180deg,
        transparent 0%,
        rgba(0,0,0,0.55) 10%,
        rgba(0,0,0,0.55) 90%,
        transparent 100%
      );
        --section-policy-bg: linear-gradient(180deg,
        transparent 0%,
        rgba(0,0,0,0.52) 10%,
        rgba(0,0,0,0.52) 90%,
        transparent 100%
      );
        --section-culture-bg: linear-gradient(180deg,
        transparent 0%,
        rgba(0,0,0,0.50) 10%,
        rgba(0,0,0,0.50) 90%,
        transparent 100%
      );
        --footer-bg: rgba(0,0,0,0.35);
      }

    *{ box-sizing: border-box; }
    html,body{ height:100%; }
    body{
      margin:0;
      color:var(--text);
      font-family: var(--font-main);
      font-weight: 400;
      background: var(--bg0);
      overflow-x:hidden;
      line-height: 1.8;
    }

      /* 背景レイヤ */
      #bg{
        position:fixed;
        inset:0;
        z-index:0;
        pointer-events:none;
        background: var(--bg-base);
        mask-image: var(--bg-mask);
        -webkit-mask-image: var(--bg-mask);
      }
        #bg canvas{
          position:absolute;
          inset:0;
          width:100%;
          height:100%;
          display:block;
          object-fit: cover;
          filter: blur(0.4px);
        }

      /* 前景コンテンツ */
      main{
        position:relative;
        z-index:1;
      }

      /* UI overlays (layout-neutral) */
      #ui{
        position: fixed;
        inset: 0;
        z-index: 2;
        pointer-events: none;
      }
        .scroll-rail{
          position: absolute;
          top: 0;
          bottom: 0;
          right: 0;
          display: flex;
          align-items: center;
          justify-content: flex-end;
          padding-right: calc(18px + env(safe-area-inset-right, 0px));
          padding-top: calc(16px + env(safe-area-inset-top, 0px));
          padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
          opacity: 0.9;
          transition: opacity 240ms ease;
        }
      .scroll-rail.is-hidden{
        opacity: 0;
      }
          .scroll-rail__inner{
            position: relative;
            width: 14px;
            height: clamp(120px, 22vh, 260px);
          }
        .scroll-rail__track{
          position: absolute;
          inset: 0;
          border-radius: 999px;
          background:
            linear-gradient(to bottom, rgba(255,255,255,0.10), rgba(255,255,255,0.10)) center/1px 100% no-repeat,
            radial-gradient(circle, rgba(255,255,255,0.26) 1.3px, transparent 2.0px) center/100% 10px repeat-y;
          opacity: 0.5;
          mask-image: linear-gradient(to bottom, transparent, black 8%, black 92%, transparent);
          -webkit-mask-image: linear-gradient(to bottom, transparent, black 8%, black 92%, transparent);
        }
        .scroll-rail__thumb{
          position: absolute;
          left: 50%;
          top: 0;
          width: 9px;
          height: 9px;
          border-radius: 999px;
          transform: translate(-50%, 0);
          background: rgba(255,255,255,0.22);
          border: 1px solid rgba(255,255,255,0.7);
          box-shadow:
            0 0 26px rgba(0,0,0,0.6),
            0 0 12px rgba(255,255,255,0.08);
          transition: transform 80ms linear;
        }
          @media (max-width: 600px){
          .scroll-rail{
            padding-right: calc(12px + env(safe-area-inset-right, 0px));
          }
            .scroll-rail__inner{
              width: 12px;
            }
            .scroll-rail__thumb{
            width: 7px;
            height: 7px;
          }
        }
      @media (prefers-reduced-motion: reduce){
        .scroll-rail__thumb{ transition: none; }
      }
      @media print{
        #ui{ display: none; }
      }

      /* ヒーローセクション */
        .hero{
          position: relative;
          min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        text-align: center;
        padding: 60px 20px;
      }
      .hero::before{
        content: '';
        position: absolute;
        inset: 0;
        background: var(--hero-bg);
        pointer-events: none;
      }
      .hero > *{
        position: relative;
      }
    .hero-logo{
      max-width: 520px;
      width: 85%;
      margin-bottom: 36px;
    }
    .hero-tagline{
      font-family: var(--font-main);
      font-size: clamp(14px, 2.5vw, 18px);
      font-weight: 400;
      opacity: 0.85;
      letter-spacing: 0.14em;
    }
    /* セクション背景レイヤ（1: テキスト / 2: 半透明オーバーレイ / 3: 背景キャンバス） */
    .section-mission,
      .section-policy,
      .section-culture{
        position: relative;
        padding: clamp(64px, 9vh, 112px) 20px;
        background: transparent; /* オーバーレイは疑似要素で描画 */
      }
    .section-mission::before,
    .section-policy::before,
    .section-culture::before{
      content: '';
      position: absolute;
      inset: 0;
      pointer-events: none;
      z-index: 0;
      /* 背景図形のコントラストを落として読みやすく */
      /* backdrop-filterは重い場合があるので、必要なら値を下げる/0にする */
      backdrop-filter: blur(1.2px);
      -webkit-backdrop-filter: blur(1.2px);
    }
    .section-mission::before{ background: var(--section-mission-bg); }
    .section-policy::before{ background: var(--section-policy-bg); }
    .section-culture::before{ background: var(--section-culture-bg); }

    .section-mission > *,
    .section-policy > *,
    .section-culture > *{
      position: relative;
      z-index: 1;
    }
.section-title{
      text-align: center;
      margin: 0 auto 44px;
      max-width: 880px;
    }
    .section-title h2{
      display: inline-block;
      font-family: var(--font-main);
      font-size: clamp(22px, 4vw, 32px);
      font-weight: 400;
      font-style: italic;
      letter-spacing: 0.1em;
      margin: 0;
      padding: 0;
      position: relative;
    }
      .section-title h2::after{
      content: '';
      display: block;
      /* Variant C: double hairline (modern editorial rule) */
      margin: clamp(8px, 1.2vw, 12px) auto 0; /* closer to the title */
      width: min(240px, 110%);
      height: 10px;
      background:
        linear-gradient(90deg,
          transparent 0%,
          rgba(255,255,255,0.18) 18%,
          rgba(255,255,255,0.42) 50%,
          rgba(255,255,255,0.18) 82%,
          transparent 100%
        ) center 2px/100% 1px no-repeat,
        linear-gradient(90deg,
          transparent 0%,
          rgba(255,255,255,0.08) 14%,
          rgba(255,255,255,0.20) 50%,
          rgba(255,255,255,0.08) 86%,
          transparent 100%
        ) center 6px/100% 1px no-repeat;
      opacity: 0.95;
    }


    /* Mission */
    .mission-headline{
      text-align: center;
      font-family: var(--font-main);
      font-size: clamp(18px, 3.8vw, 26px);
      font-weight: 500;
      margin: 0 auto 52px;
      max-width: 880px;
      line-height: 1.9;
      letter-spacing: 0.08em;
    }

    /* テキスト可読性（白地の図形の上でも読みやすく） */
    .section-mission .section-title h2,
    .section-policy .section-title h2,
    .section-culture .section-title h2,
    .mission-headline,
    .policy-headline,
    .culture-headline,
    .mission-body,
    .policy-note{
      text-shadow: 0 2px 16px rgba(0,0,0,0.55);
    }
      .mission-body{
        text-align: center;
        color: rgba(255,255,255,0.72);
        font-size: clamp(14px, 3vw, 16px);
        font-weight: 400;
        line-height: 2.4;
        letter-spacing: 0.06em;
        margin: 0 auto;
        max-width: 880px;
      }
        .mission-body p{
          margin: 0 0 28px;
        }

    /* Trading Policy */
    .policy-headline{
      text-align: center;
      font-family: var(--font-main);
      font-size: clamp(14px, 2.8vw, 17px);
      font-weight: 400;
      margin: 0 auto 52px;
      max-width: 880px;
      letter-spacing: 0.06em;
    }
    .policy-diagram{
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0;
      margin: 0 auto 52px;
      max-width: 880px;
    }
    .policy-top-box{
      padding: 12px 28px;
      border: 1px solid rgba(255,255,255,0.35);
      border-radius: 3px;
      font-family: var(--font-main);
      font-size: 14px;
      font-weight: 400;
      letter-spacing: 0.06em;
    }
    .policy-connector{
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .policy-line{
      width: 1px;
      height: 20px;
      background: rgba(255,255,255,0.25);
    }
    .policy-branch{
      width: 70%;
      max-width: 500px;
      height: 1px;
      background: rgba(255,255,255,0.25);
      position: relative;
    }
    .policy-branch::before,
    .policy-branch::after{
      content: '';
      position: absolute;
      top: 0;
      width: 1px;
      height: 16px;
      background: rgba(255,255,255,0.25);
    }
    .policy-branch::before{ left: 0; }
    .policy-branch::after{ right: 0; }
    .policy-models{
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      padding: 24px 20px;
      margin-top: 16px;
      border: 1px solid rgba(255,255,255,0.18);
      border-radius: 6px;
      background: rgba(255,255,255,0.015);
    }
    .policy-model{
      padding: 10px 20px;
      border: 1px solid rgba(255,255,255,0.28);
      border-radius: 3px;
      font-family: var(--font-main);
      font-size: 13px;
      font-weight: 400;
      letter-spacing: 0.04em;
    }
    .policy-model.ellipsis{
      border: none;
      opacity: 0.45;
      padding: 10px 8px;
    }
    .policy-note{
      text-align: center;
      color: var(--text-muted);
      font-size: 14px;
      font-weight: 400;
      line-height: 2.2;
      letter-spacing: 0.05em;
      margin: 0 auto;
      max-width: 880px;
    }

    /* Culture / Career */
    .culture-headline{
      text-align: center;
      font-family: var(--font-main);
      font-size: clamp(14px, 2.8vw, 17px);
      font-weight: 400;
      margin: 0 auto 52px;
      max-width: 880px;
      letter-spacing: 0.06em;
    }
    .culture-btn{
      display: block;
      width: fit-content;
      margin: 0 auto;
      padding: 14px 52px;
      background: rgba(255,255,255,0.14);
      border: 1px solid rgba(255,255,255,0.32);
      border-radius: 3px;
      color: var(--text);
      text-decoration: none;
      font-family: var(--font-main);
      font-size: 14px;
      font-weight: 400;
      letter-spacing: 0.1em;
      transition: background 0.3s, border-color 0.3s, color 0.3s;
    }
    .culture-btn:hover{
      background: rgba(255,255,255,0.22);
      border-color: rgba(255,255,255,0.5);
      color: var(--text);
    }

    /* フッター */
      footer{
        position: relative;
        z-index: 1;
        padding: 64px 20px 44px;
        border-top: 1px solid rgba(255,255,255,0.08);
        background: var(--footer-bg);
      }
    .footer-inner{
      max-width: 880px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .footer-left{
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .footer-logo{
      max-width: 180px;
    }
    .footer-links{
      display: flex;
      gap: 12px;
      font-family: var(--font-main);
      font-size: 13px;
      font-weight: 400;
      letter-spacing: 0.04em;
    }
    .footer-links a{
      color: var(--text);
      text-decoration: underline;
      text-underline-offset: 3px;
    }
    .footer-links span{
      opacity: 0.4;
    }
    .footer-right{
      text-align: right;
      font-family: var(--font-main);
      font-size: 12px;
      font-weight: 400;
      color: var(--text-muted);
      line-height: 1.9;
      letter-spacing: 0.04em;
    }
    .footer-right h4{
      margin: 0 0 10px;
      font-size: 13px;
      font-weight: 400;
      color: var(--text);
      letter-spacing: 0.05em;
    }
    .footer-copyright{
      text-align: center;
      margin-top: 52px;
      font-family: var(--font-main);
      font-size: 12px;
      font-weight: 400;
      color: var(--text-muted);
      letter-spacing: 0.06em;
    }

    @media (max-width: 600px){
      .footer-inner{
        grid-template-columns: 1fr;
        text-align: center;
      }
      .footer-left{ align-items: center; }
      .footer-right{ text-align: center; }
      
    
      /* Trading Policy diagram: stack models vertically & center */
      .policy-top-box{
        width: min(340px, 100%);
        text-align: center;
      }
      .policy-branch{ width: 90%; }

      .policy-models{
        width: min(340px, 100%);
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: center;
        justify-content: flex-start;
        padding: 20px 16px;
        gap: 12px;
      }
      .policy-model{
        width: min(280px, 100%);
        text-align: center;
      }
      .policy-model.ellipsis{
        width: auto;
        padding: 4px 0;
      }
    }