:root{
    --yellow:#ffd83d;
    --yellow-soft:#ffe97a;
    --pink:#ff5c9e;
    --pink-dark:#e23b80;
    --ink:#161616;
    --paper:#fffaf0;
    --line:3px solid var(--ink);
    --shadow:6px 6px 0 var(--ink);
    --shadow-sm:4px 4px 0 var(--ink);
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    background:var(--yellow);
    color:var(--ink);
    line-height:1.65;
    -webkit-text-size-adjust:100%;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;}
  .wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 18px;}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:var(--yellow);
    border-bottom:var(--line);
  }
  .header-inner{
    display:flex;align-items:center;gap:14px;
    padding:10px 0;
  }
  .brand{
    display:flex;align-items:center;gap:10px;
    font-weight:900;font-size:1.15rem;letter-spacing:1px;
    background:#fff;border:var(--line);border-radius:12px;
    padding:5px 14px 5px 8px;
    box-shadow:var(--shadow-sm);
    flex:none;
  }
  .brand img{height:32px;width:auto;border-radius:6px;}
  .nav{display:flex;gap:8px;flex-wrap:nowrap;overflow-x:auto;padding:4px 0;scrollbar-width:none;}
  .nav::-webkit-scrollbar{display:none;}
  .nav a{
    flex:none;
    text-decoration:none;font-weight:800;font-size:.86rem;
    background:#fff;border:2px solid var(--ink);border-radius:999px;
    padding:5px 13px;white-space:nowrap;
    box-shadow:2px 2px 0 var(--ink);
    transition:transform .15s, background .15s;
  }
  .nav a:hover{background:var(--pink);color:#fff;transform:translate(-1px,-1px);}
  .header-cta{margin-left:auto;flex:none;}

  .btn{
    display:inline-block;text-decoration:none;font-weight:900;
    border:var(--line);border-radius:14px;
    padding:11px 22px;
    box-shadow:var(--shadow);
    background:var(--pink);color:#fff;
    transition:transform .12s, box-shadow .12s;
    cursor:pointer;text-align:center;
  }
  .btn:hover{transform:translate(-2px,-2px);box-shadow:8px 8px 0 var(--ink);}
  .btn:active{transform:translate(3px,3px);box-shadow:2px 2px 0 var(--ink);}
  .btn-outline{background:#fff;color:var(--ink);}
  .btn-sm{padding:7px 14px;font-size:.85rem;border-radius:10px;box-shadow:var(--shadow-sm);}

  /* ---------- hero ---------- */
  .hero{padding:38px 0 46px;position:relative;}
  .hero-grid{display:grid;grid-template-columns:1fr;gap:30px;align-items:center;}
  .hero h1{
    font-size:2rem;line-height:1.25;margin:0 0 14px;
    font-weight:900;letter-spacing:.5px;
  }
  .hero h1 mark{background:var(--pink);color:#fff;padding:0 8px;border-radius:6px;border:2px solid var(--ink);}
  .hero p.lead{font-size:1.02rem;margin:0 0 22px;max-width:34em;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
  .download-row{display:flex;flex-wrap:wrap;gap:14px;}
  .badge-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
  .tag{
    background:#fff;border:2px solid var(--ink);border-radius:999px;
    padding:4px 12px;font-size:.82rem;font-weight:800;box-shadow:2px 2px 0 var(--ink);
  }
  .hero-visual{
    position:relative;
    display:grid;grid-template-columns:1fr 1fr;gap:14px;
    align-items:start;
  }
  .poster{
    background:#fff;border:var(--line);border-radius:14px;
    box-shadow:var(--shadow);overflow:hidden;
  }
  .poster img{width:100%;height:100%;object-fit:cover;aspect-ratio:3/4;}
  .poster.tilt-a{transform:rotate(-3deg);}
  .poster.tilt-b{transform:rotate(2.5deg);margin-top:26px;}
  .poster figcaption{
    font-size:.78rem;font-weight:800;text-align:center;
    padding:6px 4px;background:#fff;border-top:2px solid var(--ink);
  }
  .sticker{
    position:absolute;top:-14px;right:6px;
    background:var(--pink);color:#fff;font-weight:900;font-size:.8rem;
    border:var(--line);border-radius:999px;padding:5px 14px;
    box-shadow:var(--shadow-sm);transform:rotate(6deg);z-index:3;
  }

  /* ---------- generic section ---------- */
  section{padding:44px 0;}
  .sec-head{margin-bottom:26px;}
  .sec-head h2{
    display:inline-block;
    font-size:1.5rem;font-weight:900;margin:0 0 10px;
    background:#fff;border:var(--line);border-radius:12px;
    padding:6px 18px;box-shadow:var(--shadow-sm);
    transform:rotate(-1deg);
  }
  .sec-head p{margin:6px 0 0;max-width:44em;font-size:.98rem;}
  .h3{font-size:1.1rem;font-weight:900;margin:0 0 8px;}
  .pink-zone{background:var(--pink);border-top:var(--line);border-bottom:var(--line);}
  .pink-zone .sec-head h2{background:var(--yellow);}

  /* ---------- cards ---------- */
  .card-grid{display:grid;grid-template-columns:1fr;gap:24px;}
  .card{
    background:#fff;border:var(--line);border-radius:16px;
    box-shadow:var(--shadow);overflow:hidden;
    display:flex;flex-direction:column;
  }
  .card img.cover{width:100%;aspect-ratio:3/4;object-fit:cover;border-bottom:var(--line);}
  .card-body{padding:14px 16px 18px;flex:1;display:flex;flex-direction:column;gap:8px;}
  .card-body p{margin:0;font-size:.94rem;}
  .card-meta{font-size:.78rem;font-weight:800;color:#6a5c2f;letter-spacing:.5px;}

  /* ---------- horizontal scroller ---------- */
  .scroller{
    display:flex;gap:16px;overflow-x:auto;padding:6px 4px 18px;
    scroll-snap-type:x mandatory;scrollbar-width:thin;
  }
  .scroller .poster{
    flex:0 0 168px;scroll-snap-align:start;
    transition:transform .2s;
  }
  .scroller .poster:hover{transform:translateY(-6px) rotate(-1deg);}
  .scroller .poster img{aspect-ratio:3/4;}

  /* ---------- steps ---------- */
  .steps{display:grid;grid-template-columns:1fr;gap:18px;counter-reset:step;}
  .step{
    background:#fff;border:var(--line);border-radius:14px;
    padding:18px 18px 18px 58px;position:relative;
    box-shadow:var(--shadow-sm);
  }
  .step::before{
    counter-increment:step;content:counter(step);
    position:absolute;left:-8px;top:-10px;
    width:38px;height:38px;border-radius:50%;
    background:var(--pink);color:#fff;
    border:var(--line);display:flex;align-items:center;justify-content:center;
    font-weight:900;font-size:1.05rem;
  }
  .step h3{margin:0 0 6px;font-size:1.02rem;font-weight:900;}
  .step p{margin:0;font-size:.93rem;}

  /* ---------- ranking ---------- */
  .rank-list{list-style:none;margin:0;padding:0;display:grid;gap:12px;}
  .rank-list li{
    display:flex;align-items:center;gap:14px;
    background:#fff;border:var(--line);border-radius:14px;
    padding:10px 14px;box-shadow:var(--shadow-sm);
  }
  .rank-num{
    flex:none;width:34px;height:34px;border-radius:8px;
    border:2px solid var(--ink);
    display:flex;align-items:center;justify-content:center;
    font-weight:900;background:var(--yellow);
  }
  .rank-list li:nth-child(1) .rank-num{background:var(--pink);color:#fff;}
  .rank-list li:nth-child(2) .rank-num{background:#ffb03a;}
  .rank-list li:nth-child(3) .rank-num{background:#ffd83d;}
  .rank-list img{width:44px;height:58px;object-fit:cover;border-radius:6px;border:2px solid var(--ink);flex:none;}
  .rank-info{flex:1;min-width:0;}
  .rank-info strong{display:block;font-size:.96rem;}
  .rank-info span{font-size:.8rem;color:#6a5c2f;}
  .rank-heat{font-size:.76rem;font-weight:900;background:var(--yellow);border:2px solid var(--ink);border-radius:999px;padding:2px 10px;flex:none;}

  /* ---------- certificate ---------- */
  .cert-grid{display:grid;grid-template-columns:1fr;gap:18px;}
  .cert{
    background:#fff;border:var(--line);border-radius:14px;
    padding:20px;box-shadow:var(--shadow-sm);
    display:flex;gap:14px;align-items:flex-start;
  }
  .cert-icon{
    flex:none;width:46px;height:46px;border-radius:50%;
    background:var(--yellow);border:var(--line);
    display:flex;align-items:center;justify-content:center;
    font-weight:900;font-size:1.1rem;
  }

  /* ---------- faq ---------- */
  .faq{display:grid;gap:14px;}
  .faq details{
    background:#fff;border:var(--line);border-radius:14px;
    padding:14px 18px;box-shadow:var(--shadow-sm);
  }
  .faq summary{
    cursor:pointer;font-weight:900;font-size:1rem;list-style:none;
    display:flex;justify-content:space-between;gap:12px;align-items:center;
  }
  .faq summary::-webkit-details-marker{display:none;}
  .faq summary::after{
    content:"+";flex:none;width:26px;height:26px;border-radius:50%;
    background:var(--pink);color:#fff;border:2px solid var(--ink);
    display:flex;align-items:center;justify-content:center;font-size:1rem;line-height:1;
  }
  .faq details[open] summary::after{content:"−";}
  .faq p{margin:10px 0 0;font-size:.93rem;}

  /* ---------- community / topic ---------- */
  .two-col{display:grid;grid-template-columns:1fr;gap:24px;}
  .panel{
    background:#fff;border:var(--line);border-radius:16px;
    padding:20px;box-shadow:var(--shadow);
  }
  .panel ul{margin:10px 0 0;padding-left:20px;font-size:.93rem;}
  .panel li{margin-bottom:6px;}
  .topic-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px;}
  .topic-thumbs img{width:100%;aspect-ratio:3/4;object-fit:cover;border:2px solid var(--ink);border-radius:8px;}

  /* ---------- install guide images ---------- */
  .shot-wall{display:grid;grid-template-columns:1fr;gap:16px;margin-top:10px;}
  .shot-wall figure{margin:0;background:#fff;border:var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-sm);}
  .shot-wall img{width:100%;object-fit:cover;}
  .shot-wall figcaption{font-size:.82rem;font-weight:800;padding:8px 12px;border-top:2px solid var(--ink);text-align:center;}

  /* ---------- bottom search text ---------- */
  .related{
    padding:26px 0 8px;font-size:.82rem;color:#4a3f14;
  }
  .related a{
    display:inline-block;margin:0 10px 6px 0;color:#4a3f14;
    text-decoration:underline;text-underline-offset:3px;cursor:pointer;
  }

  /* ---------- footer ---------- */
  .site-footer{
    border-top:var(--line);background:#ffe97a;
    padding:24px 0 30px;font-size:.78rem;color:#6a5c2f;
  }
  .site-footer p{margin:0 0 6px;}
  .site-footer a{color:#6a5c2f;text-decoration:underline;}
  .site-footer .upd{font-size:.74rem;color:#8a7a45;}

  /* ---------- modal ---------- */
  .modal{
    position:fixed;inset:0;z-index:200;
    display:none;align-items:center;justify-content:center;
    background:rgba(0,0,0,.55);padding:20px;
  }
  .modal.open{display:flex;}
  .modal-box{
    background:#fff;border:var(--line);border-radius:16px;
    box-shadow:10px 10px 0 var(--ink);
    max-width:420px;width:100%;padding:22px 20px;
  }
  .modal-box p{margin:0 0 12px;font-weight:900;font-size:.96rem;line-height:1.5;}
  .modal-box input{
    width:100%;border:2px solid var(--ink);border-radius:10px;
    padding:10px 12px;font-size:.86rem;font-family:inherit;
    background:#fffaf0;color:var(--ink);
  }
  .modal-actions{display:flex;gap:10px;margin-top:14px;}
  .modal-actions .btn{flex:1;padding:9px 12px;font-size:.86rem;}

  /* ---------- breakpoints ---------- */
  @media (min-width:768px){
    .hero{padding:52px 0 64px;}
    .hero h1{font-size:2.6rem;}
    .hero-grid{grid-template-columns:1.05fr .95fr;gap:40px;}
    .card-grid{grid-template-columns:repeat(2,1fr);}
    .steps{grid-template-columns:repeat(2,1fr);}
    .cert-grid{grid-template-columns:repeat(2,1fr);}
    .two-col{grid-template-columns:1fr 1fr;}
    .scroller .poster{flex:0 0 190px;}
    .shot-wall{grid-template-columns:repeat(2,1fr);}
    section{padding:56px 0;}
    .sec-head h2{font-size:1.75rem;}
  }
  @media (min-width:1024px){
    .hero h1{font-size:3rem;}
    .card-grid{grid-template-columns:repeat(3,1fr);}
    .cert-grid{grid-template-columns:repeat(3,1fr);}
    .steps{grid-template-columns:repeat(4,1fr);}
    .shot-wall{grid-template-columns:repeat(3,1fr);}
    .nav a{font-size:.9rem;}
    .hero-visual{gap:18px;}
    section{padding:64px 0;}
  }