*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
    :root{
      --p:#1a56db;--pd:#1447c0;--pbg:#eff6ff;
      --warn:#f97316;--wbg:#fff7ed;
      --dk:#0f172a;--tx:#374151;--txl:#6b7280;
      --bg:#f9fafb;--w:#fff;--bd:#e5e7eb;
      --r:12px;--ease:.25s ease;
    }
    html{scroll-behavior:smooth}
    body{font-family:'Noto Sans SC',-apple-system,sans-serif;color:var(--tx);background:var(--bg);line-height:1.75}
    a{text-decoration:none;color:inherit}

    /* NAV */
    .nav{position:fixed;top:0;left:0;right:0;z-index:99;height:64px;background:rgba(255,255,255,.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--bd);transition:box-shadow .3s}
    .nav-inner{max-width:900px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}
    .logo{display:flex;align-items:center;gap:8px}
    .logo-mark{background:linear-gradient(135deg,var(--p),#60a5fa);color:#fff;font-weight:800;font-size:13px;padding:4px 10px;border-radius:7px}
    .logo-name{font-size:16px;font-weight:800;color:var(--dk)}
    .logo-name span{color:var(--p)}
    .nav-links{display:flex;align-items:center;gap:28px}
    .nav-links a{font-size:14px;color:var(--txl);font-weight:500;transition:color .2s}
    .nav-links a:hover{color:var(--p)}
    .nav-cta{padding:8px 20px;background:var(--p);color:#fff;border-radius:8px;font-size:14px;font-weight:700;transition:all .2s}
    .nav-cta:hover{background:var(--pd)}

    /* PAGE */
    .page{max-width:900px;margin:0 auto;padding:96px 24px 80px}

    /* HERO */
    .hero{display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;margin-bottom:52px}
    .hero-tag{display:inline-flex;align-items:center;gap:6px;background:var(--pbg);color:var(--p);font-size:13px;font-weight:600;padding:5px 12px;border-radius:99px;margin-bottom:14px;border:1px solid #bfdbfe}
    .hero h1{font-size:clamp(24px,4vw,36px);font-weight:800;color:var(--dk);line-height:1.3;margin-bottom:12px}
    .hero-desc{font-size:16px;color:var(--txl);line-height:1.8;margin-bottom:20px}
    .hero-btns{display:flex;gap:12px;flex-wrap:wrap}
    .btn-p{display:inline-flex;align-items:center;gap:6px;padding:12px 24px;background:var(--p);color:#fff;border-radius:9px;font-size:15px;font-weight:700;transition:all .2s}
    .btn-p:hover{background:var(--pd);transform:translateY(-1px);box-shadow:0 6px 18px rgba(26,86,219,.3)}
    .btn-o{display:inline-flex;align-items:center;gap:6px;padding:12px 24px;background:var(--w);color:var(--p);border:1.5px solid var(--p);border-radius:9px;font-size:15px;font-weight:600;transition:all .2s}
    .btn-o:hover{background:var(--pbg)}
    .hero-card{background:var(--w);border:1px solid var(--bd);border-radius:16px;padding:24px 28px;text-align:center;min-width:180px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
    .hc-price{font-size:36px;font-weight:900;color:var(--p);line-height:1}
    .hc-unit{font-size:14px;color:var(--txl);margin-top:4px;margin-bottom:12px}
    .hc-items{font-size:13px;color:var(--txl);line-height:2;border-top:1px solid var(--bd);padding-top:12px;text-align:left}
    .hc-items span{display:flex;align-items:center;gap:6px}
    .hc-items span::before{content:'✓';color:#10b981;font-weight:700}

    /* SECTION */
    .sec{margin-bottom:48px}
    .sec-title{font-size:18px;font-weight:800;color:var(--dk);margin-bottom:20px;display:flex;align-items:center;gap:10px}
    .sec-title::before{content:'';width:4px;height:20px;background:var(--p);border-radius:2px;display:inline-block}

    /* CHANGE TYPE GRID */
    .change-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .change-card{background:var(--w);border:1px solid var(--bd);border-radius:var(--r);padding:20px;transition:all .2s;cursor:default}
    .change-card:hover{border-color:var(--p);box-shadow:0 4px 18px rgba(26,86,219,.1)}
    .cc-icon{font-size:26px;margin-bottom:10px}
    .cc-name{font-size:15px;font-weight:700;color:var(--dk);margin-bottom:6px}
    .cc-desc{font-size:13px;color:var(--txl);line-height:1.7}
    .cc-tag{display:inline-block;margin-top:10px;font-size:12px;padding:2px 10px;border-radius:99px;font-weight:600;background:var(--pbg);color:var(--p)}
    .cc-tag.warn{background:var(--wbg);color:#c2410c}

    /* WARN BANNER */
    .warn-banner{background:var(--wbg);border:1px solid #fed7aa;border-radius:var(--r);padding:16px 20px;margin-bottom:44px;display:flex;gap:12px;align-items:flex-start}
    .warn-banner p{font-size:14px;color:#92400e;line-height:1.75}
    .warn-banner p strong{color:#c2410c}

    /* STEPS */
    .steps{display:flex;flex-direction:column;gap:0}
    .step{display:flex;gap:20px;align-items:flex-start;position:relative}
    .step:not(:last-child)::after{content:'';position:absolute;left:19px;top:44px;bottom:-4px;width:2px;background:var(--bd)}
    .step-num{width:40px;height:40px;border-radius:50%;background:var(--pbg);color:var(--p);font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;flex-shrink:0;z-index:1}
    .step-body{padding-bottom:28px;flex:1}
    .step-title{font-size:16px;font-weight:700;color:var(--dk);margin-bottom:4px}
    .step-desc{font-size:14px;color:var(--txl);line-height:1.75}
    .step-tag{display:inline-block;font-size:12px;background:#f1f5f9;color:var(--txl);padding:2px 10px;border-radius:99px;margin-top:6px;font-weight:500}

    /* MAT */
    .mat-list{display:flex;flex-direction:column;gap:8px}
    .mat-group{background:var(--w);border:1px solid var(--bd);border-radius:var(--r);overflow:hidden}
    .mat-group-title{font-size:14px;font-weight:700;color:var(--dk);padding:12px 16px;background:#f8fafc;border-bottom:1px solid var(--bd);display:flex;align-items:center;gap:8px}
    .mat-items{padding:12px 16px;display:flex;flex-direction:column;gap:6px}
    .mat-item{font-size:14px;color:var(--tx);display:flex;align-items:center;gap:8px}
    .mat-item::before{content:'📄';flex-shrink:0}
    .mat-item.opt::before{content:'📎'}
    .mat-item.opt{color:var(--txl)}

    /* FAQ */
    .faq-list{display:flex;flex-direction:column;gap:10px}
    .faq{background:var(--w);border:1px solid var(--bd);border-radius:var(--r);overflow:hidden}
    .faq-q{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;cursor:pointer;transition:background .2s;gap:12px}
    .faq-q:hover{background:#f9fafb}
    .faq-q span{font-size:15px;font-weight:600;color:var(--dk);line-height:1.4}
    .faq-arrow{font-size:13px;color:var(--txl);flex-shrink:0;transition:transform .2s}
    .faq-arrow.open{transform:rotate(180deg)}
    .faq-a{display:none;padding:0 18px 16px;font-size:14px;color:var(--tx);line-height:1.8}
    .faq-a.open{display:block}

    /* INFO BOX */
    .info-box{background:var(--pbg);border:1px solid #bfdbfe;border-radius:var(--r);padding:16px 20px;margin-bottom:44px;font-size:14px;color:#1e40af;line-height:1.8}
    .info-box strong{font-weight:700}

    /* CTA */
    .cta{background:linear-gradient(135deg,var(--p),#2563eb);border-radius:16px;padding:36px 28px;text-align:center}
    .cta h3{font-size:20px;font-weight:800;color:#fff;margin-bottom:8px}
    .cta p{font-size:15px;color:rgba(255,255,255,.8);margin-bottom:22px}
    .cta-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
    .cta .bw{display:inline-block;background:#fff;color:var(--p);padding:12px 28px;border-radius:9px;font-size:15px;font-weight:700;transition:all .2s}
    .cta .bw:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
    .cta .bo{display:inline-block;background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5);padding:12px 28px;border-radius:9px;font-size:15px;font-weight:600;transition:all .2s}
    .cta .bo:hover{border-color:#fff;background:rgba(255,255,255,.1)}

    /* FOOTER */
    .foot{text-align:center;padding:28px 24px;font-size:13px;color:var(--txl);border-top:1px solid var(--bd);margin-top:0}
    .foot a{color:var(--txl)}
    .foot a:hover{color:var(--p)}

    .fi{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
    .fi.on{opacity:1;transform:none}

    @media(max-width:700px){
      .hero{grid-template-columns:1fr}
      .hero-card{display:none}
      .change-grid{grid-template-columns:1fr 1fr}
      .nav-links{display:none}
    }
    @media(max-width:480px){
      .change-grid{grid-template-columns:1fr}
    }