:root{
      --bg:#f4f9ff;
      --white:#ffffff;
      --ink:#10233f;
      --muted:#5f738f;
      --line:#dbe8f7;
      --brand:#1f6feb;
      --brand-2:#69b3ff;
      --soft:#eaf4ff;
      --soft-2:#f7fbff;
      --accent:#0ea5e9;
      --shadow:0 18px 45px rgba(16,35,63,.08);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --max:1200px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Arial, Helvetica, sans-serif;
      color:var(--ink);
      background:linear-gradient(180deg,#f7fbff 0%, #eef6ff 100%);
      line-height:1.65;
    }

    img{
      max-width:100%;
      display:block;
      border:0;
    }

    a{
      color:var(--brand);
      text-decoration:none;
    }

    .container{
      width:min(var(--max), calc(100% - 32px));
      margin:0 auto;
    }

    .topbar{
      background:#0f2747;
      color:#fff;
      font-size:14px;
      padding:10px 0;
    }

    .topbar .container{
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }

    .navbar{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.92);
      backdrop-filter:blur(10px);
      border-bottom:1px solid var(--line);
    }

    .nav-inner{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:16px 0;
      gap:20px;
    }

    .logo{
      font-size:24px;
      font-weight:700;
      letter-spacing:.3px;
      color:#0f2747;
    }

    .nav-links{
      display:flex;
      gap:20px;
      flex-wrap:wrap;
      font-size:15px;
    }

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:14px 22px;
      border-radius:999px;
      font-weight:700;
      transition:.25s ease;
      border:1px solid transparent;
    }

    .btn-primary{
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff;
      box-shadow:0 12px 28px rgba(31,111,235,.22);
    }

    .btn-primary:hover{transform:translateY(-2px)}

    .btn-secondary{
      background:#fff;
      color:var(--brand);
      border-color:#cfe1f8;
    }

    .hero{
      padding:56px 0 34px;
    }

    .hero-grid{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:28px;
      align-items:center;
    }

    .eyebrow{
      display:inline-block;
      background:#e8f3ff;
      color:#1b5fc9;
      border:1px solid #cfe1f8;
      border-radius:999px;
      padding:8px 14px;
      font-size:13px;
      font-weight:700;
      letter-spacing:.2px;
      margin-bottom:16px;
    }

    h1{
      font-size:clamp(34px,5vw,58px);
      line-height:1.08;
      margin:0 0 16px;
      color:#0f2747;
    }

    .lead{
      font-size:18px;
      color:var(--muted);
      margin:0 0 24px;
      max-width:640px;
    }

    .hero-points{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:12px;
      margin:24px 0 28px;
    }

    .point{
      background:rgba(255,255,255,.78);
      border:1px solid var(--line);
      border-radius:16px;
      padding:14px 16px;
      font-size:15px;
      box-shadow:var(--shadow);
    }

    .hero-actions{
      display:flex;
      gap:14px;
      flex-wrap:wrap;
    }

    .card{
      background:var(--white);
      border:1px solid var(--line);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow);
      overflow:hidden;
    }

    .hero-image{
      padding:18px;
      background:linear-gradient(180deg,#ffffff 0%,#f0f7ff 100%);
    }

    /* 修正主图不变形 */
    .hero-image-frame{
      width:100%;
      aspect-ratio:4/3;
      background:#fff;
      border-radius:22px;
      overflow:hidden;
      display:flex;
      align-items:center;
      justify-content:center;
      padding:18px;
    }

    .hero-image-frame img{
      width:100%;
      height:100%;
      object-fit:contain;
      object-position:center;
    }

    .stats{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      margin:26px 0 0;
    }

    .stat{
      background:#fff;
      border:1px solid var(--line);
      border-radius:18px;
      padding:18px;
      text-align:center;
      box-shadow:var(--shadow);
    }

    .stat strong{
      display:block;
      font-size:28px;
      color:#0f2747;
      line-height:1.1;
      margin-bottom:6px;
    }

    .section{
      padding:32px 0;
    }

    .section-title{
      font-size:34px;
      margin:0 0 12px;
      color:#0f2747;
    }

    .section-subtitle{
      color:var(--muted);
      margin:0 0 24px;
      max-width:760px;
    }

    .grid-2{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:24px;
    }

    .grid-3{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:20px;
    }

    .feature-list{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:16px;
    }

    .media-card{
      background:#fff;
      border:1px solid var(--line);
      border-radius:22px;
      overflow:hidden;
      box-shadow:var(--shadow);
    }

    /* 修正详情图、手柄图、治疗图不裁切不变形 */
    .media-image-frame{
      width:100%;
      aspect-ratio:4/3;
      background:linear-gradient(180deg,#f9fcff 0%, #edf6ff 100%);
      display:flex;
      align-items:center;
      justify-content:center;
      padding:18px;
      overflow:hidden;
    }

    .media-image-frame img{
      width:100%;
      height:100%;
      object-fit:contain;
      object-position:center;
    }

    .media-caption{
      padding:14px 16px 18px;
    }

    .media-caption strong{
      display:block;
      font-size:17px;
      margin-bottom:6px;
    }

    .media-caption span{
      color:var(--muted);
      font-size:14px;
    }

    .feature-item{
      background:#fff;
      border:1px solid var(--line);
      border-radius:20px;
      padding:18px;
      box-shadow:var(--shadow);
    }

    .feature-item h3{
      margin:0 0 8px;
      font-size:19px;
      color:#0f2747;
    }

    .feature-item p{
      margin:0;
      color:var(--muted);
      font-size:15px;
    }

    .spec-wrap{
      background:#fff;
      border:1px solid var(--line);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
    }

    .spec-header{
      background:linear-gradient(135deg,#0f2747,#1f6feb);
      color:#fff;
      padding:18px 22px;
    }

    .spec-header h3{
      margin:0;
      font-size:24px;
    }

    table{
      width:100%;
      border-collapse:collapse;
    }

    th, td{
      padding:16px 18px;
      border-bottom:1px solid var(--line);
      text-align:left;
      vertical-align:top;
      font-size:15px;
    }

    th{
      width:32%;
      color:#0f2747;
      background:#f8fbff;
      font-weight:700;
    }

    .faq{
      display:grid;
      gap:16px;
    }

    details{
      background:#fff;
      border:1px solid var(--line);
      border-radius:18px;
      padding:18px 20px;
      box-shadow:var(--shadow);
    }

    summary{
      cursor:pointer;
      font-weight:700;
      color:#0f2747;
      list-style:none;
    }

    summary::-webkit-details-marker{display:none}

    details p{
      margin:12px 0 0;
      color:var(--muted);
    }

    .cta{
      padding:20px;
      background:linear-gradient(135deg,#0f2747 0%, #1f6feb 100%);
      color:#fff;
      border-radius:28px;
      box-shadow:var(--shadow);
    }

    .cta-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:20px;
      align-items:center;
    }

    .cta h2{
      margin:0 0 10px;
      font-size:34px;
      line-height:1.15;
    }

    .cta p{
      margin:0;
      color:rgba(255,255,255,.86);
    }

    .cta-actions{
      display:flex;
      justify-content:flex-end;
      gap:12px;
      flex-wrap:wrap;
    }

    .btn-light{
      background:#fff;
      color:#0f2747;
    }

    .btn-outline-light{
      background:transparent;
      color:#fff;
      border:1px solid rgba(255,255,255,.35);
    }

    .note{
      font-size:13px;
      color:var(--muted);
      margin-top:12px;
    }

    footer{
      padding:36px 0 60px;
      color:var(--muted);
      font-size:14px;
    }

    @media (max-width: 1080px){
      .hero-grid,
      .grid-2,
      .cta-grid{
        grid-template-columns:1fr;
      }

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

      .cta-actions{
        justify-content:flex-start;
      }
    }

    @media (max-width: 768px){
      .nav-links{
        display:none;
      }

      .hero-points,
      .feature-list,
      .grid-3,
      .stats{
        grid-template-columns:1fr;
      }

      h1{
        font-size:36px;
      }

      .section-title{
        font-size:28px;
      }

      .lead{
        font-size:16px;
      }

      th, td{
        display:block;
        width:100%;
      }

      th{
        border-bottom:none;
        padding-bottom:6px;
      }

      td{
        padding-top:0;
      }

      .hero-image-frame,
      .media-image-frame{
        padding:12px;
      }
    }