:root{
      --bg: #f6f7f9;
      --panel: #ffffff;
      --text: #1f2328;
      --muted: #5b6572;
      --line: rgba(20, 30, 45, .10);
      --brand: #2f3b4a;
      --accent: #355c7d;
      --accent2:#4c6f6a;
      --shadow: 0 12px 30px rgba(20, 30, 45, .08);
      --radius: 18px;
      --radius2: 14px;
      --container: 1120px;
      --padX: 20px;
    }

    *{ box-sizing: border-box; }
    html,body{ height: 100%; }
    body{
      margin:0;
      font-family: ui-sans-serif, system-ui, -apple-system, "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC", Arial, sans-serif;
      background:
        radial-gradient(1200px 600px at 15% 0%, rgba(53,92,125,.14), transparent 55%),
        radial-gradient(900px 500px at 90% 10%, rgba(76,111,106,.12), transparent 50%),
        linear-gradient(#f7f7fb, #f3f5f8);
      color: var(--text);
      overflow-x: hidden;
    }

    a{ color: inherit; text-decoration: none; }
    .container{
      width: min(var(--container), calc(100% - var(--padX) * 2));
      margin: 0 auto;
    }

    header{
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(10px);
      background: rgba(246,247,249,.72);
      border-bottom: 1px solid rgba(20, 30, 45, .08);
    }
    .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: 110px;
    }
    .logo{
      width: 38px;
      height: 38px;
      border-radius: 12px;
      background: linear-gradient(145deg, rgba(47,59,74,.12), rgba(53,92,125,.10));
      border: 1px solid rgba(20,30,45,.12);
      display:flex;
      align-items:center;
      justify-content:center;
      box-shadow: 0 10px 24px rgba(20,30,45,.06);
      color: var(--brand);
      font-weight: 800;
      letter-spacing: .5px;
      user-select: none;
    }
    .brand-title{
      display:flex;
      flex-direction: column;
      line-height: 1.1;
    }
    .brand-title strong{
      font-size: 14px;
      letter-spacing: .2px;
    }
    .brand-title span{
      font-size: 12px;
      color: var(--muted);
      margin-top: 2px;
      white-space: nowrap;
    }

    nav{
      display:flex;
      align-items:center;
      gap: 12px;
      justify-content:flex-end;
      flex-wrap: wrap;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap: 14px;
      flex-wrap: wrap;
      justify-content:flex-end;
    }
    .nav-links a{
      font-size: 13px;
      color: rgba(31,35,40,.86);
      padding: 8px 10px;
      border-radius: 12px;
      border: 1px solid transparent;
      transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
      will-change: transform;
    }
    .nav-links a:hover{
      background: rgba(255,255,255,.65);
      border-color: rgba(20,30,45,.10);
      transform: translateY(-1px);
    }

    .cta{
      display:flex;
      gap: 10px;
      align-items:center;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap: 8px;
      padding: 10px 14px;
      border-radius: 14px;
      border: 1px solid rgba(20,30,45,.12);
      background: rgba(255,255,255,.75);
      color: var(--brand);
      font-weight: 650;
      font-size: 13px;
      transition: transform .15s ease, box-shadow .15s ease, background-color .15s ease, border-color .15s ease;
      cursor: pointer;
      white-space: nowrap;
    }
    .btn:hover{
      transform: translateY(-1px);
      box-shadow: 0 14px 30px rgba(20,30,45,.10);
      border-color: rgba(20,30,45,.18);
      background: rgba(255,255,255,.95);
    }
    .btn-primary{
      background: linear-gradient(135deg, rgba(53,92,125,.14), rgba(76,111,106,.12));
      border-color: rgba(53,92,125,.30);
    }
    .btn .dot{
      width: 9px; height: 9px; border-radius: 50%;
      background: linear-gradient(180deg, var(--accent), var(--accent2));
      box-shadow: 0 0 0 4px rgba(53,92,125,.10);
    }

    .hero{
      padding: 28px 0 10px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.12fr .88fr;
      gap: 18px;
      align-items: stretch;
    }

    .hero-card{
      background: rgba(255,255,255,.76);
      border: 1px solid rgba(20,30,45,.10);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow: hidden;
      position: relative;
    }
    .hero-card::before{
      content:"";
      position:absolute;
      inset: -2px -2px auto -2px;
      height: 200px;
      background:
        radial-gradient(420px 140px at 20% 10%, rgba(53,92,125,.18), transparent 55%),
        radial-gradient(380px 120px at 75% 0%, rgba(76,111,106,.16), transparent 60%);
      pointer-events:none;
    }
    .hero-inner{
      position: relative;
      padding: 22px 22px 18px;
      display:flex;
      flex-direction: column;
      gap: 14px;
      min-height: 260px;
    }

    h1{
      font-size: clamp(22px, 3.2vw, 34px);
      margin: 0;
      letter-spacing: -0.6px;
      line-height: 1.15;
    }
    .lead{
      margin: 0;
      color: rgba(31,35,40,.80);
      font-size: 14.5px;
      line-height: 1.65;
      max-width: 62ch;
    }

    .badge-row{
      display:flex;
      gap: 10px;
      flex-wrap: wrap;
      align-items:center;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap: 8px;
      padding: 8px 10px;
      border-radius: 999px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.72);
      color: rgba(31,35,40,.86);
      font-size: 12.5px;
      transition: transform .2s ease;
    }
    .badge .mini{
      width: 20px; height: 20px; border-radius: 8px;
      background: rgba(53,92,125,.12);
      border: 1px solid rgba(53,92,125,.22);
      display:flex; align-items:center; justify-content:center;
      color: var(--accent);
      font-weight: 800;
      font-size: 12px;
    }

    .hero-actions{
      display:flex;
      gap: 10px;
      flex-wrap: wrap;
      align-items:center;
      margin-top: auto;
    }
    .linkish{
      display:inline-flex;
      align-items:center;
      gap: 10px;
      padding: 10px 14px;
      border-radius: 14px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.65);
      transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
      font-weight: 650;
      font-size: 13px;
      color: rgba(31,35,40,.92);
      cursor: pointer;
    }
    .linkish:hover{
      transform: translateY(-1px);
      background: rgba(255,255,255,.95);
      border-color: rgba(20,30,45,.18);
    }
    .arrow{
      width: 26px; height: 26px;
      border-radius: 10px;
      border: 1px solid rgba(20,30,45,.10);
      display:flex; align-items:center; justify-content:center;
      background: rgba(53,92,125,.08);
      color: var(--accent);
      flex: 0 0 auto;
    }

    .hero-side{
      background: rgba(255,255,255,.70);
      border: 1px solid rgba(20,30,45,.10);
      border-radius: var(--radius);
      box-shadow: 0 10px 24px rgba(20,30,45,.06);
      overflow:hidden;
    }
    .side-inner{
      padding: 16px 16px 12px;
      display:flex;
      flex-direction: column;
      gap: 12px;
      height: 100%;
    }

    .side-title{
      display:flex; align-items:flex-start; justify-content: space-between; gap: 12px;
    }
    .side-title h2{
      margin:0;
      font-size: 14.5px;
      letter-spacing: -0.2px;
    }
    .side-title p{
      margin: 4px 0 0;
      color: var(--muted);
      font-size: 12.5px;
      line-height: 1.5;
    }

    .media{
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap: 10px;
      align-items:start;
    }
    .imgbox{
      border-radius: 14px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.65);
      overflow:hidden;
      position: relative;
    }
    .imgbox img{
      width: 100%;
      display:block;
      height: auto;
      object-fit: contain;
      transform: scale(1.01);
    }
    .imgbox::after{
      content:"";
      position:absolute;
      inset:0;
      background: linear-gradient(180deg, rgba(255,255,255,.0), rgba(255,255,255,.35));
      pointer-events:none;
    }

    .side-list{
      padding: 8px 0 0;
      border-top: 1px solid rgba(20,30,45,.08);
      display:flex;
      flex-direction: column;
      gap: 10px;
    }
    .side-item{
      display:flex;
      gap: 10px;
      align-items:flex-start;
    }
    .side-ic{
      width: 30px; height: 30px;
      border-radius: 12px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(53,92,125,.08);
      display:flex; align-items:center; justify-content:center;
      color: var(--accent);
      font-weight: 900;
      flex: 0 0 auto;
      transition: transform .2s ease;
    }
    .side-item:hover .side-ic{ transform: translateY(-1px); }
    .side-item strong{
      font-size: 13.5px;
      display:block;
      margin-top: 1px;
    }
    .side-item span{
      display:block;
      font-size: 12.5px;
      color: var(--muted);
      line-height: 1.45;
      margin-top: 2px;
    }

    main{
      padding: 14px 0 22px;
    }

    .section{
      margin-top: 14px;
    }
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content: space-between;
      gap: 14px;
      margin-bottom: 10px;
    }
    .section-head h2{
      margin:0;
      font-size: 18px;
      letter-spacing: -0.3px;
    }
    .section-head .hint{
      color: var(--muted);
      font-size: 12.5px;
      line-height: 1.4;
      margin: 0;
      max-width: 48ch;
    }

    .cards{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 12px;
    }
    .card{
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(20,30,45,.10);
      border-radius: var(--radius2);
      padding: 14px 14px 12px;
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
      min-height: 140px;
      display:flex;
      flex-direction: column;
      gap: 8px;
      position: relative;
      overflow: hidden;
    }
    .card::before{
      content:"";
      position:absolute;
      right: -40px; top: -40px;
      width: 110px; height: 110px;
      border-radius: 50%;
      background: radial-gradient(circle at 30% 30%, rgba(53,92,125,.18), transparent 60%);
      pointer-events:none;
      opacity: .9;
    }
    .card:hover{
      transform: translateY(-2px);
      box-shadow: 0 18px 40px rgba(20,30,45,.10);
      border-color: rgba(20,30,45,.18);
    }
    .kpi{
      display:flex; align-items:center; justify-content: space-between; gap: 12px;
      position: relative;
    }
    .kpi .tag{
      display:inline-flex;
      align-items:center;
      gap: 8px;
      padding: 7px 10px;
      border-radius: 999px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.7);
      font-size: 12.5px;
      color: rgba(31,35,40,.88);
      white-space: nowrap;
    }
    .kpi .tag i{
      width: 10px; height: 10px; border-radius: 50%;
      background: linear-gradient(180deg, var(--accent), var(--accent2));
      display:inline-block;
    }
    .kpi .num{
      font-weight: 900;
      color: rgba(31,35,40,.92);
      font-size: 16px;
      letter-spacing: -0.4px;
    }
    .card h3{
      margin: 0;
      font-size: 15px;
      letter-spacing: -0.2px;
      position: relative;
    }
    .card p{
      margin:0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.6;
      position: relative;
    }

    .method-grid{
      display:grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 12px;
      align-items: start;
    }
    .panel{
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(20,30,45,.10);
      border-radius: var(--radius2);
      padding: 14px;
      box-shadow: 0 10px 24px rgba(20,30,45,.05);
    }
    .toc{
      display:flex;
      flex-direction: column;
      gap: 10px;
    }
    .toc a{
      display:flex;
      align-items:flex-start;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 12px;
      border-radius: 14px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.65);
      transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
    }
    .toc a:hover{
      transform: translateY(-1px);
      background: rgba(255,255,255,.95);
      border-color: rgba(20,30,45,.18);
    }
    .toc strong{
      font-size: 13.5px;
      letter-spacing: -0.2px;
    }
    .toc span{
      display:block;
      color: var(--muted);
      font-size: 12.5px;
      line-height: 1.4;
      margin-top: 3px;
    }
    .toc .chev{
      width: 28px; height: 28px;
      border-radius: 12px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(53,92,125,.08);
      display:flex; align-items:center; justify-content:center;
      color: var(--accent);
      flex: 0 0 auto;
      margin-top: 2px;
    }

    .steps{
      display:flex;
      flex-direction: column;
      gap: 10px;
    }
    .step{
      display:flex;
      gap: 10px;
      align-items:flex-start;
      padding: 10px 12px;
      border-radius: 14px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.65);
      transition: transform .15s ease, border-color .15s ease;
    }
    .step:hover{
      transform: translateY(-1px);
      border-color: rgba(20,30,45,.18);
    }
    .step .idx{
      width: 30px; height: 30px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(53,92,125,.16), rgba(76,111,106,.10));
      border: 1px solid rgba(53,92,125,.26);
      display:flex; align-items:center; justify-content:center;
      font-weight: 900;
      color: rgba(31,35,40,.92);
      flex: 0 0 auto;
    }
    .step strong{
      display:block;
      font-size: 13.5px;
      letter-spacing: -0.2px;
      margin-top: 2px;
    }
    .step span{
      display:block;
      color: var(--muted);
      font-size: 12.5px;
      line-height: 1.55;
      margin-top: 4px;
    }

    .case-grid{
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 12px;
    }
    .case{
      padding: 14px;
      border-radius: var(--radius2);
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.72);
      transition: transform .2s ease, box-shadow .2s ease;
      display:flex;
      flex-direction: column;
      gap: 10px;
      min-height: 170px;
    }
    .case:hover{
      transform: translateY(-2px);
      box-shadow: 0 18px 40px rgba(20,30,45,.10);
    }
    .case .type{
      display:flex;
      align-items:center;
      justify-content: space-between;
      gap: 10px;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap: 8px;
      padding: 7px 10px;
      border-radius: 999px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.65);
      font-size: 12.5px;
      color: rgba(31,35,40,.88);
      white-space: nowrap;
    }
    .pill i{
      width: 10px; height: 10px; border-radius: 50%;
      background: rgba(53,92,125,.65);
      display:inline-block;
    }
    .case p{
      margin:0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.65;
    }
    .case ul{
      margin: 0;
      padding-left: 18px;
      color: rgba(31,35,40,.86);
      font-size: 13px;
      line-height: 1.7;
    }
    .case li{ margin: 2px 0; color: var(--muted); }

    .faq{
      display:grid;
      grid-template-columns: 1fr;
      gap: 10px;
    }
    details{
      border-radius: 14px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.72);
      overflow: hidden;
      transition: border-color .2s ease, transform .2s ease;
    }
    details[open]{
      border-color: rgba(53,92,125,.34);
    }
    summary{
      cursor:pointer;
      list-style:none;
      padding: 12px 14px;
      display:flex;
      align-items:flex-start;
      justify-content: space-between;
      gap: 12px;
      user-select:none;
    }
    summary::-webkit-details-marker{ display:none; }
    .q{
      font-weight: 750;
      font-size: 14px;
      letter-spacing: -0.2px;
      color: rgba(31,35,40,.92);
    }
    .plus{
      width: 30px; height: 30px;
      border-radius: 12px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(53,92,125,.08);
      display:flex; align-items:center; justify-content:center;
      color: var(--accent);
      flex: 0 0 auto;
      transition: transform .2s ease;
      margin-top: -2px;
    }
    details[open] .plus{ transform: rotate(45deg); }
    .a{
      padding: 0 14px 14px;
      color: var(--muted);
      font-size: 13.2px;
      line-height: 1.75;
    }
    .a b{ color: rgba(31,35,40,.92); }

    .conclude{
      display:flex;
      gap: 12px;
      align-items:flex-start;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .conclude .callout{
      flex: 1 1 520px;
      padding: 14px;
      border-radius: var(--radius2);
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.72);
      box-shadow: 0 10px 24px rgba(20,30,45,.05);
    }
    .conclude h3{
      margin:0 0 6px;
      font-size: 15.5px;
      letter-spacing: -0.2px;
    }
    .conclude p{
      margin:0;
      color: var(--muted);
      font-size: 13.2px;
      line-height: 1.75;
    }
    .inline-links{
      display:flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-top: 10px;
    }
    .inline-links a{
      display:inline-flex;
      align-items:center;
      gap: 10px;
      padding: 10px 12px;
      border-radius: 14px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.65);
      transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
      font-weight: 650;
      font-size: 13px;
      color: rgba(31,35,40,.92);
      white-space: nowrap;
    }
    .inline-links a:hover{
      transform: translateY(-1px);
      background: rgba(255,255,255,.95);
      border-color: rgba(20,30,45,.18);
    }
    .inline-links .ic{
      width: 26px; height: 26px;
      border-radius: 10px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(76,111,106,.10);
      display:flex; align-items:center; justify-content:center;
      color: var(--accent2);
      flex: 0 0 auto;
      font-weight: 900;
    }

    .footer{
      margin-top: 12px;
      background: #f1f3f6;
      border-top: 1px solid rgba(20,30,45,.10);
      padding: 18px 0 20px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 12px;
      align-items: start;
    }
    .foot-card{
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(20,30,45,.10);
      border-radius: var(--radius2);
      padding: 14px;
    }
    .foot-card h2{
      margin:0 0 8px;
      font-size: 15.5px;
      letter-spacing: -0.2px;
    }
    .kv{
      display:grid;
      grid-template-columns: 1fr;
      gap: 8px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.6;
    }
    .kv a{
      color: rgba(0,102,204,.98);
      text-decoration: underline;
      text-underline-offset: 3px;
    }
    .foot-right{
      display:flex;
      flex-direction: column;
      gap: 10px;
    }
    .mini-links{
      display:flex;
      flex-direction: column;
      gap: 8px;
    }
    .mini-links a{
      display:flex;
      align-items:flex-start;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 12px;
      border-radius: 14px;
      border: 1px solid rgba(20,30,45,.10);
      background: rgba(255,255,255,.65);
      transition: transform .15s ease, border-color .15s ease, background-color .15s ease;
      color: rgba(31,35,40,.92);
      font-size: 13px;
      font-weight: 650;
    }
    .mini-links a:hover{
      transform: translateY(-1px);
      background: rgba(255,255,255,.95);
      border-color: rgba(20,30,45,.18);
    }
    .mini-links span{
      color: var(--muted);
      font-weight: 600;
      font-size: 12.5px;
      line-height: 1.4;
      margin-top: 2px;
      display:block;
    }
    .copyright{
      margin-top: 10px;
      text-align: center;
      color: rgba(31,35,40,.65);
      font-size: 12.5px;
    }

    .float-anim{
      animation: floatIn .55s ease both;
    }
    @keyframes floatIn{
      from{ opacity: 0; transform: translateY(8px); }
      to{ opacity: 1; transform: translateY(0); }
    }

    @media (max-width: 960px){
      .hero-grid{ grid-template-columns: 1fr; }
      .cards{ grid-template-columns: 1fr; }
      .method-grid{ grid-template-columns: 1fr; }
      .case-grid{ grid-template-columns: 1fr; }
      .footer-grid{ grid-template-columns: 1fr; }
      .nav-links{ display:none; }
    }