:root{
      --bg0:#f6fbfb;
      --bg1:#ffffff;
      --text:#1f2a37;
      --muted:#5b6b7c;
      --line:#e6eef3;
      --brand:#0f766e;
      --brand2:#0ea5e9;
      --card:#ffffff;
      --shadow: 0 10px 30px rgba(15,118,110,.10);
      --shadow2: 0 18px 50px rgba(14,165,233,.10);
      --radius:18px;
      --radius2:14px;
      --focus: 0 0 0 4px rgba(14,165,233,.18);
    }
    *{box-sizing:border-box}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(1000px 600px at 15% 0%, rgba(14,165,233,.14), transparent 55%),
        radial-gradient(900px 520px at 70% 10%, rgba(15,118,110,.16), transparent 52%),
        linear-gradient(180deg, var(--bg0) 0%, var(--bg1) 48%, #ffffff 100%);
      overflow-x:hidden;
    }
    a{color:inherit}
    .container{
      width:100%;
      max-width:1120px;
      padding:0 18px;
      margin:0 auto;
    }
    header{
      position:sticky;
      top:0;
      z-index:20;
      background:rgba(246,251,251,.72);
      backdrop-filter: blur(10px);
      border-bottom:1px solid rgba(230,238,243,.7);
    }
    .nav-wrap{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding:12px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:120px;
    }
    .logo{
      width:36px;height:36px;border-radius:12px;
      background: linear-gradient(135deg, rgba(15,118,110,.95), rgba(14,165,233,.95));
      display:flex;align-items:center;justify-content:center;
      color:#fff;font-weight:800;letter-spacing:.5px;
      box-shadow: 0 12px 28px rgba(15,118,110,.25);
      transform: translateZ(0);
    }
    .brand-name{
      display:flex;flex-direction:column;line-height:1.05;
    }
    .brand-name strong{font-size:14px}
    .brand-name span{font-size:12px;color:var(--muted)}
    nav{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:8px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .nav-links a{
      text-decoration:none;
      padding:9px 10px;
      border-radius:12px;
      color:var(--muted);
      border:1px solid transparent;
      transition: transform .15s ease, border-color .15s ease, background .15s ease, color .15s ease;
      font-size:13px;
      white-space:nowrap;
    }
    .nav-links a:hover{
      color:var(--text);
      background: rgba(255,255,255,.7);
      border-color: rgba(14,165,233,.20);
      transform: translateY(-1px);
    }
    .nav-cta{
      display:flex;align-items:center;gap:10px;
    }
    .btn{
      appearance:none;
      border:1px solid rgba(14,165,233,.28);
      background: rgba(255,255,255,.75);
      color:var(--text);
      padding:10px 12px;
      border-radius:14px;
      cursor:pointer;
      font-weight:700;
      font-size:13px;
      transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
      white-space:nowrap;
    }
    .btn:focus{outline:none; box-shadow: var(--focus);}
    .btn:hover{
      transform: translateY(-1px);
      background: #fff;
      box-shadow: 0 16px 40px rgba(14,165,233,.12);
      border-color: rgba(14,165,233,.45);
    }
    .btn.primary{
      border-color: rgba(15,118,110,.35);
      background: linear-gradient(135deg, rgba(15,118,110,.95), rgba(14,165,233,.92));
      color:#fff;
      box-shadow: 0 18px 45px rgba(15,118,110,.20);
    }
    .btn.primary:hover{
      box-shadow: 0 22px 60px rgba(15,118,110,.25);
      border-color: rgba(255,255,255,.25);
    }

    .hero{
      padding:26px 0 6px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.15fr .85fr;
      gap:18px;
      align-items:stretch;
    }
    .hero-card{
      border:1px solid rgba(230,238,243,.95);
      border-radius: calc(var(--radius) + 6px);
      background:
        radial-gradient(900px 500px at 20% 0%, rgba(14,165,233,.20), transparent 60%),
        radial-gradient(700px 380px at 70% 20%, rgba(15,118,110,.18), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,.85), rgba(255,255,255,.65));
      box-shadow: var(--shadow);
      padding:22px 20px;
      position:relative;
      overflow:hidden;
    }
    .hero-card::after{
      content:"";
      position:absolute;
      inset:-2px;
      background:
        radial-gradient(420px 240px at 20% 15%, rgba(14,165,233,.18), transparent 60%),
        radial-gradient(340px 220px at 75% 25%, rgba(15,118,110,.18), transparent 58%);
      pointer-events:none;
      opacity:.9;
    }
    .hero-inner{position:relative; z-index:1}
    .eyebrow{
      display:inline-flex;
      gap:8px;
      align-items:center;
      padding:7px 10px;
      border-radius:999px;
      border:1px solid rgba(14,165,233,.22);
      background: rgba(255,255,255,.70);
      color:var(--muted);
      font-size:13px;
      font-weight:700;
    }
    .dot{
      width:9px;height:9px;border-radius:50%;
      background: linear-gradient(135deg, var(--brand2), var(--brand));
      box-shadow: 0 10px 22px rgba(14,165,233,.18);
      animation: pulse 2.6s ease-in-out infinite;
    }
    @keyframes pulse{
      0%,100%{transform:scale(1); opacity:.9}
      50%{transform:scale(1.18); opacity:1}
    }
    h1{
      margin:14px 0 10px;
      font-size:34px;
      letter-spacing:-.6px;
      line-height:1.15;
    }
    .lead{
      margin:0;
      color:var(--muted);
      font-size:15px;
      line-height:1.7;
      max-width:66ch;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:16px;
      align-items:center;
    }
    .pill{
      display:inline-flex;
      gap:10px;
      align-items:center;
      padding:10px 12px;
      border-radius:16px;
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.72);
      color:var(--muted);
      font-size:13px;
      font-weight:700;
    }
    .pill svg{flex:0 0 auto}
    .side-card{
      border:1px solid rgba(230,238,243,.95);
      border-radius: var(--radius);
      background: rgba(255,255,255,.74);
      box-shadow: var(--shadow2);
      padding:16px;
      display:flex;
      flex-direction:column;
      gap:12px;
      overflow:hidden;
    }
    .side-top{
      display:flex; align-items:flex-start; justify-content:space-between; gap:10px;
    }
    .side-title{
      font-weight:900;
      font-size:16px;
      margin:0;
      line-height:1.35;
    }
    .mini-tag{
      padding:8px 10px;
      border-radius:999px;
      font-size:12px;
      border:1px solid rgba(15,118,110,.25);
      color:var(--brand);
      background: rgba(15,118,110,.08);
      font-weight:900;
      white-space:nowrap;
    }
    .steps{
      display:flex; flex-direction:column; gap:10px;
      margin:0; padding:0; list-style:none;
    }
    .step{
      display:flex; gap:12px; align-items:flex-start;
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(230,238,243,.9);
      background: rgba(255,255,255,.65);
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
    }
    .step:hover{
      transform: translateY(-2px);
      border-color: rgba(14,165,233,.30);
      background:#fff;
    }
    .num{
      width:26px;height:26px;border-radius:10px;
      background: linear-gradient(135deg, rgba(14,165,233,.22), rgba(15,118,110,.18));
      border:1px solid rgba(14,165,233,.25);
      display:flex;align-items:center;justify-content:center;
      font-weight:950; font-size:13px; color:var(--brand);
      flex:0 0 auto;
    }
    .step b{display:block; font-size:13px; margin-top:2px}
    .step span{display:block; font-size:12.5px; color:var(--muted); line-height:1.45; margin-top:4px}

    main{padding:16px 0 18px}
    .grid-2{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:16px;
      align-items:start;
    }
    .section{
      margin-top:14px;
      border-radius: var(--radius);
      background: rgba(255,255,255,.70);
      border:1px solid rgba(230,238,243,.95);
      box-shadow: 0 10px 30px rgba(31,42,55,.04);
      overflow:hidden;
    }
    .section-inner{
      padding:18px 18px 16px;
    }
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:12px;
      margin-bottom:10px;
    }
    .section h2{
      margin:0;
      font-size:18px;
      letter-spacing:-.2px;
    }
    .kicker{
      color:var(--muted);
      font-size:13px;
      font-weight:800;
      margin:0;
      white-space:nowrap;
    }
    .toc{
      display:flex; flex-wrap:wrap; gap:10px;
      padding:0; margin:8px 0 0; list-style:none;
    }
    .toc a{
      display:inline-flex; align-items:center; gap:8px;
      text-decoration:none;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.65);
      color:var(--text);
      font-size:13px;
      font-weight:850;
      transition: transform .16s ease, border-color .16s ease, background .16s ease;
      scroll-margin-top:84px;
    }
    .toc a:hover{
      transform: translateY(-2px);
      border-color: rgba(14,165,233,.30);
      background:#fff;
    }
    .toc svg{opacity:.85}

    .article{
      padding:16px 18px 18px;
    }
    .article p{
      margin:0;
      color:var(--muted);
      line-height:1.75;
      font-size:14.5px;
    }
    .anchor-h3{
      margin:16px 0 8px;
      font-size:16px;
      letter-spacing:-.15px;
    }
    .list-grid{
      display:grid;
      grid-template-columns: 1fr;
      gap:10px;
      margin-top:10px;
    }
    .item{
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.65);
      border-radius:16px;
      padding:12px 12px;
      display:flex;
      gap:12px;
      align-items:flex-start;
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
    }
    .item:hover{
      transform: translateY(-2px);
      border-color: rgba(15,118,110,.28);
      background:#fff;
    }
    .badge{
      width:30px;height:30px;border-radius:12px;
      display:flex;align-items:center;justify-content:center;
      font-weight:950;
      color:var(--brand);
      background: rgba(15,118,110,.10);
      border:1px solid rgba(15,118,110,.22);
      flex:0 0 auto;
    }
    .item b{
      display:block;
      font-size:14px;
      letter-spacing:-.1px;
      margin-top:1px;
    }
    .item span{
      display:block;
      color:var(--muted);
      font-size:13.2px;
      line-height:1.6;
      margin-top:5px;
    }

    .case-strip{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:14px;
      align-items:stretch;
      margin-top:12px;
    }
    .case{
      border:1px dashed rgba(14,165,233,.35);
      background: linear-gradient(180deg, rgba(255,255,255,.70), rgba(255,255,255,.55));
      border-radius: 16px;
      padding:14px;
      position:relative;
      overflow:hidden;
    }
    .case::before{
      content:"";
      position:absolute;
      inset:-40px -30px auto auto;
      width:160px;height:160px;
      background: radial-gradient(circle at 30% 30%, rgba(14,165,233,.18), transparent 62%);
      transform: rotate(12deg);
      pointer-events:none;
    }
    .case h3{
      margin:0 0 8px;
      font-size:15px;
      position:relative;
    }
    .case p{
      position:relative;
      margin:0;
      color:var(--muted);
      line-height:1.7;
      font-size:13.8px;
    }
    .case ul{
      position:relative;
      margin:10px 0 0;
      padding-left:18px;
      color:var(--muted);
      line-height:1.7;
      font-size:13.6px;
    }
    .side-check{
      border-radius:16px;
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.68);
      padding:14px;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .side-check h3{margin:0; font-size:15px}
    .checklist{
      margin:0; padding:0; list-style:none;
      display:flex; flex-direction:column; gap:8px;
    }
    .check{
      display:flex; gap:10px; align-items:flex-start;
      padding:10px 10px;
      border-radius:14px;
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.62);
    }
    .tick{
      width:20px;height:20px;border-radius:7px;
      background: rgba(14,165,233,.12);
      border:1px solid rgba(14,165,233,.25);
      display:flex;align-items:center;justify-content:center;
      color:var(--brand2);
      flex:0 0 auto;
      margin-top:1px;
    }
    .check b{display:block; font-size:13.4px}
    .check span{display:block; color:var(--muted); font-size:12.8px; margin-top:4px; line-height:1.5}

    .faq{
      padding:16px 18px 18px;
    }
    details{
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.68);
      border-radius:16px;
      padding:12px 12px;
      margin-top:10px;
      transition: border-color .16s ease, background .16s ease, transform .16s ease;
    }
    details[open]{
      border-color: rgba(14,165,233,.30);
      background: #fff;
      transform: translateY(-1px);
    }
    summary{
      cursor:pointer;
      list-style:none;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      font-weight:950;
      font-size:14px;
      letter-spacing:-.1px;
      outline:none;
    }
    summary::-webkit-details-marker{display:none}
    .chev{
      width:28px;height:28px;border-radius:12px;
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.65);
      display:flex;align-items:center;justify-content:center;
      transition: transform .2s ease, border-color .2s ease;
      flex:0 0 auto;
    }
    details[open] .chev{transform: rotate(180deg); border-color: rgba(14,165,233,.35)}
    details .faq-body{
      margin-top:10px;
      color:var(--muted);
      line-height:1.75;
      font-size:14px;
    }

    .summary{
      padding:16px 18px 18px;
    }
    .summary-box{
      display:flex;
      gap:14px;
      align-items:flex-start;
      justify-content:space-between;
      padding:14px;
      border-radius:16px;
      background: linear-gradient(135deg, rgba(14,165,233,.10), rgba(15,118,110,.08));
      border:1px solid rgba(14,165,233,.20);
    }
    .summary-box h3{margin:0; font-size:15px}
    .summary-box p{
      margin:6px 0 0;
      color:var(--muted);
      line-height:1.7;
      font-size:14px;
      max-width:70ch;
    }
    .link-row{
      display:flex; flex-wrap:wrap; gap:10px;
      margin-top:10px;
    }
    .link-chip{
      text-decoration:none;
      padding:10px 12px;
      border-radius:14px;
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.70);
      color:var(--text);
      font-weight:900;
      font-size:13px;
      transition: transform .16s ease, border-color .16s ease, background .16s ease;
    }
    .link-chip:hover{
      transform: translateY(-2px);
      background:#fff;
      border-color: rgba(15,118,110,.28);
    }

    .gallery{
      padding:16px 18px 18px;
    }
    .gallery-grid{
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap:12px;
      margin-top:10px;
    }
    figure{
      margin:0;
      border-radius:16px;
      border:1px solid rgba(230,238,243,.95);
      background: rgba(255,255,255,.65);
      overflow:hidden;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    figure:hover{
      transform: translateY(-2px);
      box-shadow: 0 18px 60px rgba(14,165,233,.12);
      border-color: rgba(14,165,233,.28);
    }
    .img-wrap{
      padding:10px;
    }
    .img-wrap img{
      width:100%;
      height:auto;
      display:block;
      border-radius:12px;
      background: #f1f6f8;
    }
    figcaption{
      padding:10px 12px 12px;
      color:var(--muted);
      font-size:13px;
      line-height:1.5;
      border-top:1px solid rgba(230,238,243,.95);
    }

    footer{
      margin-top:14px;
      background: #0b2a33;
      color: #eaf3f6;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-inner{
      padding:18px 0 14px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:14px;
      align-items:start;
    }
    .foot-title{
      display:flex; align-items:center; gap:10px;
      margin:0 0 8px;
    }
    .logo-small{
      width:30px;height:30px;border-radius:12px;
      background: linear-gradient(135deg, rgba(14,165,233,.95), rgba(15,118,110,.95));
      color:#fff; display:flex;align-items:center;justify-content:center;
      font-weight:900;
      box-shadow: 0 14px 38px rgba(14,165,233,.22);
    }
    .foot-title strong{letter-spacing:-.2px}
    .foot-text{
      margin:0;
      color: rgba(234,243,246,.86);
      line-height:1.7;
      font-size:13.6px;
    }
    .foot-right{
      display:flex; flex-direction:column; gap:10px; align-items:flex-end;
    }
    .foot-links{
      display:flex; flex-wrap:wrap; gap:10px;
      justify-content:flex-end;
    }
    .foot-links a{
      text-decoration:none;
      color: rgba(234,243,246,.88);
      border:1px solid rgba(255,255,255,.14);
      background: rgba(255,255,255,.04);
      padding:9px 10px;
      border-radius:14px;
      font-weight:800;
      font-size:12.8px;
      transition: transform .16s ease, background .16s ease, border-color .16s ease;
      white-space:nowrap;
    }
    .foot-links a:hover{
      transform: translateY(-2px);
      background: rgba(255,255,255,.07);
      border-color: rgba(14,165,233,.35);
    }
    .copyright{
      margin-top:12px;
      padding-top:12px;
      border-top:1px solid rgba(255,255,255,.10);
      color: rgba(234,243,246,.72);
      font-size:12.6px;
      text-align:center;
    }

    .reveal{
      opacity:0;
      transform: translateY(10px);
      transition: opacity .5s ease, transform .5s ease;
      will-change: opacity, transform;
    }
    .reveal.in{
      opacity:1;
      transform: translateY(0);
    }

    .sr-only{
      position:absolute; width:1px;height:1px; padding:0;margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
    }

    @media (max-width: 940px){
      .hero-grid{grid-template-columns: 1fr; }
      h1{font-size:28px}
      .grid-2{grid-template-columns: 1fr}
      .case-strip{grid-template-columns: 1fr}
      .gallery-grid{grid-template-columns: 1fr}
      .footer-grid{grid-template-columns: 1fr}
      .foot-right{align-items:flex-start}
      .foot-links{justify-content:flex-start}
      .nav-wrap{padding:10px 0}
    }
    @media (prefers-reduced-motion: reduce){
      *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important}
    }