:root{
    --navy:#1b2a4a;
    --navy-2:#24365e;
    --gold:#c9a227;
    --gold-lt:#e8cf7a;
    --mist:#f1f4ff;
    --ink:#2c3550;
    --muted:#5c6685;
    --line:#e3e8f5;
    --white:#ffffff;
    --radius:16px;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  body{
    font-family:"Segoe UI","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
    color:var(--ink);
    background:linear-gradient(180deg,#f6f8ff 0%,#ffffff 100%);
    line-height:1.65;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;height:auto;display:block;}
  .wrap{max-width:1120px;margin:0 auto;padding:0 20px;}

  /* ============ HERO ============ */
  .hero{
    background:
      radial-gradient(1200px 500px at 85% -10%, rgba(201,162,39,.14), transparent 60%),
      radial-gradient(900px 480px at 0% 110%, rgba(36,54,94,.10), transparent 55%),
      linear-gradient(150deg,#1b2a4a 0%,#24365e 55%,#2c4472 100%);
    color:#fff;
    padding:64px 0 56px;
    position:relative;
    overflow:hidden;
  }
  .hero::after{
    content:"";position:absolute;right:-120px;bottom:-160px;width:480px;height:480px;
    border-radius:50%;border:2px solid rgba(201,162,39,.25);
    box-shadow:0 0 0 48px rgba(201,162,39,.06),0 0 0 96px rgba(201,162,39,.04);
    pointer-events:none;
  }
  .hero .grid{display:flex;align-items:center;gap:48px;position:relative;z-index:1;}
  .hero .txt{flex:1.15;}
  .hero .imgbox{flex:1;}
  .hero .imgbox img{border-radius:var(--radius);box-shadow:0 24px 60px rgba(0,0,0,.35);}
  .kicker{
    display:inline-block;font-size:12.5px;letter-spacing:2.5px;text-transform:uppercase;
    color:var(--gold-lt);border:1px solid rgba(201,162,39,.5);border-radius:999px;
    padding:6px 16px;margin-bottom:18px;background:rgba(201,162,39,.08);
  }
  .hero h1{font-size:44px;line-height:1.15;font-weight:800;letter-spacing:-.5px;margin-bottom:14px;}
  .hero h1 em{font-style:normal;color:var(--gold-lt);}
  .hero .sub{font-size:16.5px;color:#d7dff2;max-width:540px;margin-bottom:26px;}
  .hero .cta-row{display:flex;gap:14px;flex-wrap:wrap;}
  .btn{
    display:inline-block;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;
    text-decoration:none;transition:.25s;
  }
  .btn-gold{background:linear-gradient(135deg,#d9b64a,#c9a227);color:#1b2a4a;box-shadow:0 10px 24px rgba(201,162,39,.35);}
  .btn-gold:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(201,162,39,.45);}
  .btn-ghost{border:1.5px solid rgba(255,255,255,.45);color:#fff;}
  .btn-ghost:hover{background:rgba(255,255,255,.1);}

  /* ============ USP STRIP ============ */
  .usp{
    background:var(--white);border-bottom:1px solid var(--line);
    box-shadow:0 6px 24px rgba(27,42,74,.05);position:relative;z-index:2;
  }
  .usp .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
  .usp .item{padding:22px 24px;display:flex;gap:14px;align-items:center;border-right:1px solid var(--line);}
  .usp .item:last-child{border-right:none;}
  .usp .ico{
    width:46px;height:46px;flex:none;border-radius:12px;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,#eef3ff,#f7f9ff);border:1px solid var(--line);font-size:22px;
  }
  .usp .b b{display:block;font-size:15px;color:var(--navy);}
  .usp .b span{font-size:12.5px;color:var(--muted);}

  /* ============ SECTION BASE ============ */
  section{padding:64px 0;}
  .sec-head{text-align:center;max-width:760px;margin:0 auto 40px;}
  .sec-head .tag{
    display:inline-block;font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--gold);
    font-weight:700;margin-bottom:10px;
  }
  .sec-head h2{font-size:31px;font-weight:800;color:var(--navy);letter-spacing:-.3px;}
  .sec-head p{color:var(--muted);margin-top:10px;font-size:15.5px;}

  /* ============ OVERVIEW ============ */
  .overview .grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
  .overview .pics{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .overview .pics img{border-radius:14px;box-shadow:0 14px 34px rgba(27,42,74,.10);}
  .overview .pics img:first-child{grid-column:1 / -1;}
  .overview h3{font-size:24px;color:var(--navy);margin-bottom:14px;font-weight:800;}
  .overview p{color:var(--muted);margin-bottom:14px;font-size:15.5px;}
  .ov-list{list-style:none;margin-top:18px;}
  .ov-list li{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--ink);}
  .ov-list li:last-child{border-bottom:none;}
  .ov-list .chk{color:var(--gold);font-weight:800;flex:none;}

  /* ============ PROCESS 3-STEP ============ */
  .process{background:linear-gradient(180deg,#f1f4ff, #fbfcff);}
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
  .step{
    background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
    transition:.25s;box-shadow:0 8px 22px rgba(27,42,74,.05);
  }
  .step:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(27,42,74,.12);}
  .step img{width:100%;aspect-ratio:1/1;object-fit:cover;}
  .step .body{padding:20px 22px 24px;}
  .step .no{
    display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;
    background:linear-gradient(135deg,#d9b64a,#c9a227);color:#1b2a4a;font-weight:800;font-size:15px;margin-bottom:10px;
  }
  .step h4{font-size:17px;color:var(--navy);margin-bottom:6px;font-weight:800;}
  .step p{font-size:13.8px;color:var(--muted);}

  /* ============ PRODUCTION CHAIN ============ */
  .chain-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;}
  .chain{
    background:var(--white);border:1px solid var(--line);border-radius:14px;padding:16px 12px;text-align:center;
  }
  .chain .n{font-size:12px;color:var(--gold);font-weight:800;letter-spacing:1px;}
  .chain b{display:block;font-size:13.5px;color:var(--navy);margin-top:4px;}
  .chain span{font-size:11.5px;color:var(--muted);}

  /* ============ SPEC TABLE ============ */
  .spec-table{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:0 10px 30px rgba(27,42,74,.06);}
  .spec-table th,.spec-table td{padding:15px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);}
  .spec-table th{background:var(--navy);color:#fff;font-weight:700;width:34%;}
  .spec-table tr:last-child td{border-bottom:none;}
  .spec-table tr:nth-child(even) td{background:#f8faff;}

  /* ============ GALLERIES ============ */
  .gal{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;}
  .gal-item{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fff;aspect-ratio:1/1;}
  .gal-item img{width:100%;height:100%;object-fit:cover;transition:.3s;}
  .gal-item:hover img{transform:scale(1.06);}
  .gal-item .cap{
    position:absolute;left:0;right:0;bottom:0;padding:18px 8px 7px;font-size:11.5px;color:#fff;text-align:center;
    background:linear-gradient(180deg,transparent,rgba(27,42,74,.82));font-weight:600;letter-spacing:.3px;
  }
  .gal-8{grid-template-columns:repeat(4,1fr);}
  .gal-5{grid-template-columns:repeat(5,1fr);}

  /* ============ CASE ============ */
  .case .grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
  .case .pics{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .case .pics img{border-radius:14px;box-shadow:0 14px 34px rgba(27,42,74,.10);}
  .case .pics img:first-child{grid-column:1 / -1;}
  .case h3{font-size:24px;color:var(--navy);margin-bottom:14px;font-weight:800;}
  .case p{color:var(--muted);margin-bottom:14px;font-size:15.5px;}
  .case .note{
    background:#fff8e6;border:1px solid #f0dfae;border-radius:12px;padding:14px 16px;font-size:13.5px;color:#7a6420;margin-top:16px;
  }

  /* ============ COMPARE ============ */
  .compare{background:linear-gradient(180deg,#fbfcff,#f1f4ff);}
  .cmp-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
  .cmp{
    background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 8px 22px rgba(27,42,74,.05);
  }
  .cmp.hard{border-top:4px solid var(--gold);}
  .cmp.soft{border-top:4px solid var(--navy-2);}
  .cmp h4{font-size:19px;color:var(--navy);margin-bottom:10px;font-weight:800;}
  .cmp .badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#fff;border-radius:999px;padding:3px 12px;margin-bottom:12px;}
  .cmp.hard .badge{background:linear-gradient(135deg,#d9b64a,#c9a227);}
  .cmp.soft .badge{background:var(--navy-2);}
  .cmp ul{list-style:none;}
  .cmp li{display:flex;gap:9px;padding:7px 0;font-size:14.5px;color:var(--ink);border-bottom:1px dashed var(--line);}
  .cmp li:last-child{border-bottom:none;}
  .cmp .d{color:var(--gold);font-weight:800;flex:none;}
  .cmp .d.blue{color:#4a6bb5;}

  /* ============ DESIGN GUIDE ============ */
  .dg{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;}
  .dg-item{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:20px 16px;text-align:center;position:relative;}
  .dg-item .n{
    width:38px;height:38px;margin:0 auto 12px;border-radius:50%;display:flex;align-items:center;justify-content:center;
    background:var(--navy);color:#fff;font-weight:800;font-size:16px;
  }
  .dg-item b{display:block;font-size:14.5px;color:var(--navy);margin-bottom:6px;}
  .dg-item p{font-size:12.5px;color:var(--muted);}

  /* ============ FAQ ============ */
  .faq{max-width:860px;margin:0 auto;}
  details{
    background:var(--white);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;
    box-shadow:0 4px 14px rgba(27,42,74,.04);
  }
  summary{
    cursor:pointer;padding:18px 22px;font-weight:700;font-size:15.5px;color:var(--navy);list-style:none;
    display:flex;justify-content:space-between;align-items:center;gap:14px;
  }
  summary::-webkit-details-marker{display:none;}
  summary::after{content:"+";font-size:22px;color:var(--gold);font-weight:400;transition:.25s;flex:none;}
  details[open] summary::after{transform:rotate(45deg);}
  details .a{padding:0 22px 20px;color:var(--muted);font-size:14.5px;}
  details .a b{color:var(--navy);}

  /* ============ CTA ============ */
  .cta{
    background:
      radial-gradient(900px 400px at 15% 0%, rgba(201,162,39,.16), transparent 55%),
      linear-gradient(150deg,#1b2a4a,#2c4472);
    color:#fff;text-align:center;padding:72px 20px;
  }
  .cta h2{font-size:34px;font-weight:800;margin-bottom:12px;}
  .cta p{color:#cdd7ec;max-width:640px;margin:0 auto 26px;font-size:16px;}
  .cta .small{font-size:12.5px;color:#93a3c8;margin-top:16px;}

  footer{background:#141d33;color:#8b97b8;text-align:center;padding:26px 16px;font-size:12.5px;}

  /* ============ RESPONSIVE ============ */
  @media (max-width:960px){
    .hero h1{font-size:34px;}
    .usp .grid{grid-template-columns:repeat(2,1fr);}
    .usp .item:nth-child(2){border-right:none;}
    .usp .item:nth-child(-n+2){border-bottom:1px solid var(--line);}
    .overview .grid,.case .grid{grid-template-columns:1fr;}
    .steps{grid-template-columns:1fr;}
    .chain-grid{grid-template-columns:repeat(3,1fr);}
    .dg{grid-template-columns:repeat(2,1fr);}
    .cmp-grid{grid-template-columns:1fr;}
    .gal{grid-template-columns:repeat(3,1fr);}
    .gal-8{grid-template-columns:repeat(2,1fr);}
    .gal-5{grid-template-columns:repeat(3,1fr);}
  }
  @media (max-width:560px){
    section{padding:48px 0;}
    .hero{padding:44px 0 40px;}
    .hero .grid{flex-direction:column;gap:30px;}
    .hero h1{font-size:28px;}
    .usp .grid{grid-template-columns:1fr;}
    .usp .item{border-right:none;border-bottom:1px solid var(--line);}
    .usp .item:last-child{border-bottom:none;}
    .chain-grid{grid-template-columns:repeat(2,1fr);}
    .gal,.gal-5{grid-template-columns:repeat(2,1fr);}
    .sec-head h2{font-size:25px;}
  }