*{margin:0;padding:0;box-sizing:border-box;}
  :root{
    --red:#900000;
    --red-dark:#6f0000;
    --paper:#fbfaf8;
    --card:#ffffff;
    --ink:#22201e;
    --body:#4d4a47;
    --muted:#8b8580;
    --line:#e7e2dc;
    --soft:#f3efea;
  }
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    background:var(--paper);
    color:var(--body);
    line-height:1.75;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{color:var(--ink);line-height:1.35;font-weight:700;}
  a{text-decoration:none;color:inherit;}
  img{max-width:100%;display:block;}
  .wrap{max-width:1120px;margin:0 auto;padding:0 24px;}

  /* header */
  .site-head{
    position:sticky;top:0;z-index:50;
    background:rgba(251,250,248,.94);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
  }
  .head-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:16px;}
  .brand{display:flex;align-items:center;gap:10px;}
  .brand img{height:34px;width:auto;}
  .brand b{color:var(--red);font-size:1.25rem;letter-spacing:.02em;}
  .nav{display:flex;gap:26px;list-style:none;}
  .nav a{font-size:.92rem;color:var(--ink);font-weight:500;transition:color .2s;}
  .nav a:hover{color:var(--red);}
  .head-cta{
    display:inline-block;background:var(--red);color:#fff;
    font-size:.88rem;font-weight:600;padding:9px 20px;border-radius:6px;
    transition:background .2s,transform .2s;
  }
  .head-cta:hover{background:var(--red-dark);transform:translateY(-1px);}

  /* hero */
  .hero{padding:80px 0 64px;border-bottom:1px solid var(--line);}
  .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;}
  .kicker{
    display:inline-block;font-size:.78rem;letter-spacing:.12em;
    color:var(--red);background:#f7ecec;border-radius:20px;
    padding:5px 14px;margin-bottom:20px;font-weight:600;
  }
  .hero h1{font-size:2.9rem;letter-spacing:-.01em;margin-bottom:20px;}
  .hero h1 em{font-style:normal;color:var(--red);}
  .hero p.lead{font-size:1.1rem;color:var(--body);margin-bottom:16px;}
  .hero .note{
    font-size:.95rem;color:var(--muted);
    border-left:3px solid var(--red);padding-left:16px;margin-bottom:30px;
  }
  .hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;
    padding:13px 30px;border-radius:6px;font-size:.98rem;font-weight:600;
    transition:all .2s ease;border:1px solid transparent;
  }
  .btn-main{background:var(--red);color:#fff;}
  .btn-main:hover{background:var(--red-dark);transform:translateY(-2px);box-shadow:0 6px 16px rgba(144,0,0,.18);}
  .btn-ghost{border-color:var(--line);color:var(--ink);background:#fff;}
  .btn-ghost:hover{border-color:var(--red);color:var(--red);}
  .hero-shot{
    border:1px solid var(--line);border-radius:10px;overflow:hidden;
    box-shadow:0 18px 40px rgba(0,0,0,.08);background:#fff;
  }
  .hero-shot img{width:100%;}

  /* sections */
  section{padding:72px 0;}
  .sec-title{font-size:1.75rem;margin-bottom:12px;}
  .sec-title span{color:var(--red);}
  .sec-desc{font-size:1rem;color:var(--body);max-width:700px;margin-bottom:40px;}

  /* values */
  .values{background:var(--soft);border-bottom:1px solid var(--line);}
  .value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
  .value-card{
    background:var(--card);border:1px solid var(--line);border-radius:8px;
    padding:28px 22px;transition:transform .25s,box-shadow .25s;
  }
  .value-card:hover{transform:translateY(-5px);box-shadow:0 10px 26px rgba(0,0,0,.07);}
  .value-card h3{font-size:1.08rem;margin-bottom:10px;}
  .value-card p{font-size:.93rem;color:var(--body);}
  .value-mark{
    font-size:.8rem;font-weight:700;color:var(--red);
    background:#f7ecec;border-radius:4px;display:inline-block;
    padding:2px 9px;margin-bottom:14px;letter-spacing:.06em;
  }

  /* guide */
  .guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .guide-card{
    background:var(--card);border:1px solid var(--line);border-radius:8px;
    overflow:hidden;display:flex;flex-direction:column;
    transition:transform .25s,box-shadow .25s;
  }
  .guide-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(0,0,0,.07);}
  .shot{background:#f4f1ec;border-bottom:1px solid var(--line);padding:14px;}
  .shot img{width:100%;height:230px;object-fit:contain;border-radius:4px;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.06);}
  .shot.tall img{height:280px;}
  .guide-body{padding:22px;flex:1;}
  .step-tag{
    display:inline-block;background:var(--red);color:#fff;font-size:.72rem;
    font-weight:700;letter-spacing:.06em;padding:3px 10px;border-radius:12px;margin-bottom:10px;
  }
  .guide-body h3{font-size:1.05rem;margin-bottom:8px;}
  .guide-body p{font-size:.93rem;color:var(--body);}

  /* feature rows */
  .features{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .feature-row{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-bottom:56px;}
  .feature-row:last-child{margin-bottom:0;}
  .feature-row.flip .feature-text{order:2;}
  .feature-row.flip .feature-img{order:1;}
  .feature-text h3{font-size:1.35rem;margin-bottom:12px;}
  .feature-text p{font-size:.98rem;color:var(--body);margin-bottom:10px;}
  .feature-text .tip{font-size:.9rem;color:var(--muted);}
  .feature-img{
    border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff;
    box-shadow:0 10px 26px rgba(0,0,0,.06);
  }
  .feature-img img{width:100%;}

  /* museum / wall */
  .wall{background:var(--soft);border-top:1px solid var(--line);}
  .wall-scroll{
    display:flex;gap:18px;overflow-x:auto;padding-bottom:16px;scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
  }
  .wall-item{
    flex:0 0 320px;scroll-snap-align:start;background:#fff;
    border:1px solid var(--line);border-radius:8px;overflow:hidden;
  }
  .wall-item img{width:100%;height:210px;object-fit:contain;background:#faf8f5;padding:10px;}
  .wall-item figcaption{padding:14px 16px;font-size:.88rem;color:var(--body);border-top:1px solid var(--line);}

  /* faq */
  .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
  .faq-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:26px;}
  .faq-card h3{font-size:1.02rem;margin-bottom:10px;display:flex;gap:10px;align-items:flex-start;}
  .faq-card h3::before{
    content:"Q";flex:0 0 24px;height:24px;border-radius:50%;
    background:var(--red);color:#fff;font-size:.78rem;
    display:flex;align-items:center;justify-content:center;margin-top:2px;
  }
  .faq-card p{font-size:.93rem;color:var(--body);padding-left:34px;}

  /* download */
  .download{background:var(--red);color:#fff;text-align:center;}
  .download h2{color:#fff;font-size:2rem;margin-bottom:14px;}
  .download p{color:rgba(255,255,255,.88);max-width:620px;margin:0 auto 32px;font-size:1rem;}
  .download .btn-light{background:#fff;color:var(--red);}
  .download .btn-light:hover{background:#f6efef;transform:translateY(-2px);}
  .download .meta{display:block;margin-top:22px;font-size:.82rem;color:rgba(255,255,255,.65);}

  /* footer */
  .site-foot{background:#fff;border-top:1px solid var(--line);padding:46px 0 30px;}
  .foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:30px;}
  .foot-brand b{color:var(--red);font-size:1.08rem;display:block;margin-bottom:10px;}
  .foot-brand p{font-size:.88rem;color:var(--muted);max-width:360px;}
  .foot-col h4{font-size:.92rem;margin-bottom:12px;color:var(--ink);}
  .foot-col ul{list-style:none;}
  .foot-col li{margin-bottom:9px;}
  .foot-col a{font-size:.86rem;color:var(--muted);transition:color .2s;}
  .foot-col a:hover{color:var(--red);}
  .foot-bottom{
    border-top:1px solid var(--line);padding-top:20px;
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:.8rem;color:var(--muted);line-height:1.9;
  }
  .foot-bottom a{color:var(--muted);}
  .foot-bottom a:hover{color:var(--red);}
  .foot-bottom time{font-size:.8rem;color:var(--muted);}

  @media (max-width:1024px){
    .hero h1{font-size:2.4rem;}
    .value-grid{grid-template-columns:repeat(2,1fr);}
    .guide-grid{grid-template-columns:1fr 1fr;}
    .feature-row{gap:30px;}
    .foot-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:768px){
    .nav{display:none;}
    .hero{padding:56px 0 46px;}
    .hero-grid{grid-template-columns:1fr;gap:34px;}
    .hero h1{font-size:2rem;}
    section{padding:52px 0;}
    .sec-title{font-size:1.45rem;}
    .value-grid,.guide-grid,.faq-grid{grid-template-columns:1fr;}
    .feature-row,.feature-row.flip{grid-template-columns:1fr;}
    .feature-row.flip .feature-text,.feature-row.flip .feature-img{order:initial;}
    .foot-grid{grid-template-columns:1fr;gap:26px;}
    .foot-bottom{flex-direction:column;gap:6px;}
    .wall-item{flex:0 0 270px;}
  }