:root{
    --hero-h: 650px;      /* ✅ Desktop Hero height */
    --hero-max: 1120px;
    --hero-pad: 20px;
  }

  .oem-hero{
    position: relative;
    height: var(--hero-h);
    width: 100%;
    overflow: hidden;
    background: #0b1220;
    font-family: Inter, "Segoe UI", Arial, sans-serif;
  }

  .oem-hero *{ box-sizing: border-box; }

  .oem-hero__bg{
    position:absolute;
    inset:0;
    background-image: url("//ueeshop.ly200-cdn.com/u_file/UPBF/UPBF225/2601/24/photo/DSC02019.jpg");
    background-size: cover;
    background-position: center right;
    transform: scale(1.02);
  }

  .oem-hero__overlay{
    position:absolute;
    inset:0;
    background:
      linear-gradient(90deg,
        rgba(6,14,28,0.92) 0%,
        rgba(6,14,28,0.86) 22%,
        rgba(6,14,28,0.70) 40%,
        rgba(6,14,28,0.35) 58%,
        rgba(6,14,28,0.08) 72%,
        rgba(6,14,28,0.00) 85%);
  }

  .oem-hero__inner{
    position: relative;
    z-index: 2;
    height: 100%;
    max-width: var(--hero-max);
    margin: 0 auto;
    padding: 0 var(--hero-pad);
    display: flex;
    align-items: center;
  }

  .oem-hero__content{
    max-width: 680px;   /* 控制节奏，不压死 */
    color: #fff;
  }

  /* ===== Hero H1 — v2.2 ===== */
  .oem-hero__title{
    margin: 0 0 26px;
    font-size: clamp(52px, 4.2vw, 68px);
    font-weight: 600;
    line-height: 1.12;
    letter-spacing: -0.015em;
    max-width: 26ch;   /* ✅ 稳定两行 */
    text-shadow: 0 2px 4px rgba(0,0,0,.30);
  }

  /* ===== Hero Lead — v2.2 (允许自然两行) ===== */
  .oem-hero__lead{
    margin: 0;
    font-size: clamp(20px, 1.6vw, 26px);
    font-weight: 400;
    line-height: 1.55;
    max-width: 60ch;   /* ✅ 自然 1–2 行 */
    opacity: 0.92;
    text-shadow: 0 2px 4px rgba(0,0,0,.30);
  }

  /* ===== Mobile ===== */
  @media (max-width: 900px){
    :root{ --hero-h: 360px; }

    .oem-hero__content{
      max-width: 100%;
    }

    .oem-hero__title{
      font-size: 36px;
      line-height: 1.2;
      max-width: none;
      margin-bottom: 18px;
    }

    .oem-hero__lead{
      font-size: 17px;
      line-height: 1.7;
      max-width: none;
    }

    .oem-hero__overlay{
      background:
        linear-gradient(90deg,
          rgba(6,14,28,0.94) 0%,
          rgba(6,14,28,0.88) 40%,
          rgba(6,14,28,0.35) 70%,
          rgba(6,14,28,0.00) 92%);
    }
  }