:root{
    --yellow:#FFD400;
    --black:#0A0A0A;
    --white:#FFFFFF;
    --red:#E5322D;
    --paper:#F6F1E1;
    --line:4px solid #0A0A0A;
    --shadow:8px 8px 0 #0A0A0A;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--yellow);
    color:var(--black);
    font-family:"PingFang SC","Helvetica Neue","Microsoft YaHei",Arial,sans-serif;
    font-weight:700;
    line-height:1.6;
    overflow-x:hidden;
  }
  a{color:inherit;text-decoration:none;}
  img{display:block;max-width:100%;}
  .wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}

  /* ============ header ============ */
  .site-header{
    background:var(--yellow);
    border-bottom:var(--line);
    position:sticky;top:0;z-index:50;
  }
  .head-inner{
    display:flex;align-items:center;justify-content:space-between;
    gap:16px;padding:12px 0;
  }
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand img{
    height:34px;width:auto;
    border:3px solid var(--black);
    background:var(--white);
    object-fit:cover;
  }
  .brand span{
    font-size:20px;letter-spacing:1px;white-space:nowrap;
  }
  .nav-links{
    display:flex;gap:8px;overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .nav-links::-webkit-scrollbar{display:none;}
  .nav-links a{
    flex:0 0 auto;
    font-size:13px;
    padding:7px 12px;
    background:var(--white);
    border:3px solid var(--black);
    box-shadow:3px 3px 0 var(--black);
    transition:transform .12s ease,box-shadow .12s ease;
  }
  .nav-links a:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--black);}

  /* ============ hero ============ */
  .hero{
    padding:36px 0 46px;
    position:relative;
  }
  .hero-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:26px;
    align-items:center;
  }
  .hero-tag{
    display:inline-block;
    background:var(--black);color:var(--yellow);
    font-size:13px;padding:5px 12px;
    border:3px solid var(--black);
    margin-bottom:16px;
    letter-spacing:2px;
  }
  .hero h1{
    font-size:clamp(34px,7vw,64px);
    line-height:1.02;
    letter-spacing:-1px;
    margin-bottom:18px;
  }
  .hero h1 .box{
    display:inline-block;
    background:var(--white);
    border:var(--line);
    box-shadow:var(--shadow);
    padding:2px 12px 6px;
    margin:4px 6px 4px 0;
    transform:rotate(-1.5deg);
  }
  .hero h1 .box.alt{
    background:var(--yellow);
    transform:rotate(1deg);
  }
  .hero-lead{
    font-size:16px;font-weight:600;max-width:520px;
    margin-bottom:22px;
    background:var(--white);
    border:var(--line);
    padding:14px 16px;
    box-shadow:6px 6px 0 var(--black);
  }
  .download-row{
    display:flex;flex-wrap:wrap;gap:14px;align-items:center;
  }
  .btn-dl{
    display:inline-flex;align-items:center;gap:8px;
    padding:13px 22px;
    font-size:15px;font-weight:800;
    border:var(--line);
    box-shadow:6px 6px 0 var(--black);
    transition:transform .12s ease,box-shadow .12s ease;
    cursor:pointer;
    background:var(--white);color:var(--black);
  }
  .btn-dl.primary{background:var(--black);color:var(--yellow);}
  .btn-dl:hover{transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--black);}
  .btn-dl .ico{font-size:17px;line-height:1;}

  .hero-visual{
    position:relative;
    padding:0 0 46px 0;
  }
  .hero-shot{
    border:var(--line);
    box-shadow:12px 12px 0 var(--black);
    background:var(--white);
    overflow:hidden;
    max-width:340px;
    margin:0 auto;
  }
  .hero-shot img{width:100%;height:auto;}
  .red-block{
    position:absolute;
    right:0;bottom:0;
    width:78px;height:78px;
    background:var(--red);
    border:var(--line);
    box-shadow:6px 6px 0 var(--black);
    display:flex;align-items:center;justify-content:center;
    font-size:38px;color:var(--black);
    font-weight:900;line-height:1;
  }
  .red-block span{transform:translateY(-2px);}

  /* ============ section base ============ */
  section{padding:44px 0;}
  .sec-head{margin-bottom:24px;}
  .sec-kicker{
    display:inline-block;
    font-size:12px;letter-spacing:3px;
    background:var(--black);color:var(--yellow);
    padding:3px 10px;margin-bottom:10px;
  }
  .sec-head h2{
    font-size:clamp(24px,4.5vw,38px);
    line-height:1.15;
    letter-spacing:-0.5px;
  }
  .sec-head p{
    font-size:15px;font-weight:600;
    margin-top:10px;max-width:620px;
  }
  .on-white{background:var(--white);border-top:var(--line);border-bottom:var(--line);}
  .on-dark{background:var(--black);color:var(--white);}
  .on-dark .sec-kicker{background:var(--yellow);color:var(--black);}
  .on-paper{background:var(--paper);border-top:var(--line);border-bottom:var(--line);}

  /* ============ poster grid ============ */
  .poster-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:16px;
  }
  .poster{
    background:var(--white);
    border:var(--line);
    box-shadow:6px 6px 0 var(--black);
    overflow:hidden;
    transition:transform .15s ease;
  }
  .poster:hover{transform:translateY(-4px);}
  .poster .ph{
    width:100%;
    aspect-ratio:3/4;
    object-fit:cover;
    border-bottom:4px solid var(--black);
  }
  .poster .cap{
    padding:10px 12px;
    font-size:13px;
    line-height:1.4;
  }
  .poster .cap strong{display:block;font-size:15px;margin-bottom:2px;}
  .poster .cap em{font-style:normal;font-weight:600;font-size:12px;opacity:.75;}

  /* ============ list cards ============ */
  .card-row{
    display:grid;
    grid-template-columns:1fr;
    gap:18px;
  }
  .card{
    background:var(--yellow);
    border:var(--line);
    box-shadow:7px 7px 0 var(--black);
    padding:18px;
    display:flex;gap:16px;align-items:flex-start;
  }
  .card .thumb{
    flex:0 0 84px;width:84px;
    border:3px solid var(--black);
    overflow:hidden;
  }
  .card .thumb img{width:100%;aspect-ratio:3/4;object-fit:cover;}
  .card h3{font-size:17px;margin-bottom:6px;line-height:1.3;}
  .card p{font-size:13.5px;font-weight:600;line-height:1.6;}
  .card .num{
    display:inline-block;
    background:var(--black);color:var(--yellow);
    font-size:12px;padding:1px 8px;margin-bottom:8px;
  }

  /* ============ screenshot wall ============ */
  .scroll-wall{
    display:flex;gap:16px;
    overflow-x:auto;
    padding:6px 2px 20px;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
  }
  .scroll-wall::-webkit-scrollbar{height:8px;}
  .scroll-wall::-webkit-scrollbar-thumb{background:var(--black);}
  .wall-item{
    flex:0 0 200px;
    scroll-snap-align:start;
    background:var(--white);
    border:var(--line);
    box-shadow:6px 6px 0 var(--black);
    overflow:hidden;
  }
  .wall-item img{width:100%;aspect-ratio:3/4;object-fit:cover;}
  .wall-item .wc{padding:8px 10px;font-size:12.5px;font-weight:700;}

  /* ============ steps ============ */
  .steps{
    display:grid;
    grid-template-columns:1fr;
    gap:18px;
    counter-reset:step;
  }
  .step{
    background:var(--white);
    border:var(--line);
    box-shadow:6px 6px 0 var(--black);
    padding:18px 18px 20px;
    position:relative;
  }
  .step::before{
    counter-increment:step;
    content:"0" counter(step);
    display:block;
    font-size:30px;line-height:1;
    margin-bottom:10px;
    color:var(--red);
  }
  .step h3{font-size:17px;margin-bottom:6px;}
  .step p{font-size:13.5px;font-weight:600;}

  /* ============ review / talk ============ */
  .talk-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:18px;
  }
  .talk{
    border:var(--line);
    box-shadow:6px 6px 0 var(--black);
    padding:18px;
    background:var(--white);
  }
  .talk p{font-size:14px;font-weight:600;line-height:1.7;}
  .talk .who{
    margin-top:12px;font-size:12.5px;letter-spacing:1px;
    display:flex;align-items:center;gap:8px;
  }
  .talk .who i{
    display:inline-block;width:26px;height:26px;
    background:var(--red);border:3px solid var(--black);
    font-style:normal;font-size:12px;
    display:flex;align-items:center;justify-content:center;
    color:var(--white);
  }

  /* ============ rank table ============ */
  .rank-list{display:flex;flex-direction:column;gap:10px;}
  .rank-item{
    display:flex;align-items:center;gap:14px;
    background:var(--white);color:var(--black);
    border:var(--line);
    box-shadow:5px 5px 0 var(--red);
    padding:10px 14px;
  }
  .rank-item .rno{
    font-size:24px;line-height:1;flex:0 0 40px;
    color:var(--red);font-weight:900;
  }
  .rank-item .rname{font-size:15px;flex:1;min-width:0;}
  .rank-item .rname small{display:block;font-size:12px;font-weight:600;opacity:.7;}
  .rank-item .rmark{
    font-size:12px;background:var(--black);color:var(--yellow);
    padding:2px 8px;flex:0 0 auto;
  }

  /* ============ faq ============ */
  .faq-list{display:flex;flex-direction:column;gap:14px;}
  details.faq{
    background:var(--white);
    border:var(--line);
    box-shadow:6px 6px 0 var(--black);
    padding:14px 16px;
  }
  details.faq summary{
    cursor:pointer;font-size:15.5px;list-style:none;
    display:flex;justify-content:space-between;gap:12px;
  }
  details.faq summary::-webkit-details-marker{display:none;}
  details.faq summary::after{content:"+";font-size:20px;line-height:1;}
  details.faq[open] summary::after{content:"−";}
  details.faq p{
    margin-top:10px;font-size:13.5px;font-weight:600;line-height:1.7;
    border-top:3px solid var(--black);padding-top:10px;
  }

  /* ============ extra feature band ============ */
  .feature-grid{
    display:grid;grid-template-columns:1fr;gap:16px;
  }
  .feature{
    background:var(--yellow);
    border:var(--line);
    box-shadow:6px 6px 0 var(--black);
    padding:16px;
  }
  .feature h3{font-size:16px;margin-bottom:6px;}
  .feature p{font-size:13.5px;font-weight:600;}

  /* ============ cta ============ */
  .cta-band{
    background:var(--black);color:var(--yellow);
    border-top:var(--line);border-bottom:var(--line);
    padding:40px 0;
  }
  .cta-inner{
    display:flex;flex-direction:column;gap:20px;
    align-items:flex-start;
  }
  .cta-inner h2{
    font-size:clamp(24px,5vw,40px);line-height:1.15;color:var(--white);
  }
  .cta-inner h2 b{color:var(--yellow);}
  .cta-inner p{font-size:14.5px;font-weight:600;color:#f2ecc9;max-width:560px;}

  /* ============ toast ============ */
  .toast{
    position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);
    background:var(--black);color:var(--yellow);
    border:3px solid var(--yellow);
    padding:12px 18px;font-size:13.5px;
    z-index:99;opacity:0;pointer-events:none;
    transition:opacity .2s ease,transform .2s ease;
    max-width:86vw;
  }
  .toast.show{opacity:1;transform:translate(-50%,0);}

  /* ============ footer ============ */
  .site-footer{
    background:var(--paper);
    border-top:var(--line);
    padding:26px 0 30px;
    color:#4a453a;
    font-weight:600;
  }
  .foot-top{
    display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;
    margin-bottom:14px;
  }
  .foot-logo{display:flex;align-items:center;gap:10px;font-size:14px;color:#0A0A0A;font-weight:800;}
  .foot-logo img{height:24px;border:2px solid var(--black);background:#fff;}
  .foot-nav{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:12.5px;}
  .foot-nav a:hover{text-decoration:underline;}
  .foot-search{
    font-size:12px;line-height:1.9;margin-bottom:14px;
    border-top:2px dashed #bdb49a;padding-top:12px;
  }
  .foot-search b{color:#0A0A0A;}
  .foot-search span{margin-right:14px;white-space:nowrap;display:inline-block;}
  .foot-bottom{
    font-size:11.5px;line-height:1.9;color:#6d6759;
    border-top:2px dashed #bdb49a;padding-top:12px;
    display:flex;flex-wrap:wrap;gap:6px 18px;
  }
  .foot-bottom a{color:#6d6759;text-decoration:underline;}
  .foot-bottom time{font-variant-numeric:tabular-nums;}

  /* ============ responsive ============ */
  @media (min-width:768px){
    .poster-grid{grid-template-columns:repeat(3,1fr);gap:18px;}
    .card-row{grid-template-columns:repeat(2,1fr);}
    .steps{grid-template-columns:repeat(2,1fr);}
    .talk-grid{grid-template-columns:repeat(2,1fr);}
    .feature-grid{grid-template-columns:repeat(2,1fr);}
    .hero{padding:48px 0 56px;}
    .hero-grid{grid-template-columns:1.05fr .95fr;gap:34px;}
    .hero-visual{padding-bottom:40px;}
    .red-block{right:12px;bottom:0;width:90px;height:90px;font-size:44px;}
    .wall-item{flex:0 0 220px;}
    section{padding:56px 0;}
  }
  @media (min-width:1024px){
    .poster-grid{grid-template-columns:repeat(4,1fr);}
    .card-row{grid-template-columns:repeat(2,1fr);gap:22px;}
    .steps{grid-template-columns:repeat(4,1fr);}
    .talk-grid{grid-template-columns:repeat(3,1fr);}
    .feature-grid{grid-template-columns:repeat(4,1fr);}
    .hero{padding:56px 0 70px;}
    .cta-inner{flex-direction:row;justify-content:space-between;align-items:center;}
    section{padding:68px 0;}
  }