:root{
  --ink:#17242c;--muted:#5e6b72;--paper:#f8f7f2;--card:#fff;--line:#d9e0e3;
  --navy:#183b4e;--blue:#227ca7;--coral:#d86758;--yellow:#f0c75e;--green:#5c7e65;
  --shadow:0 14px 40px rgba(19,42,54,.09);--radius:22px;--max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Yu Gothic","Hiragino Kaku Gothic ProN","Meiryo",system-ui,sans-serif;line-height:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
.site-header{position:sticky;top:0;z-index:50;background:rgba(248,247,242,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(23,36,44,.08)}
.header-inner{max-width:var(--max);margin:auto;padding:14px 24px;display:flex;align-items:center;gap:24px}
.brand{font-weight:900;letter-spacing:.02em;font-size:1.18rem;white-space:nowrap}
.brand-mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--navy);color:#fff;margin-right:9px;font-size:.82rem}
.nav{display:flex;gap:18px;margin-left:auto;font-size:.91rem;font-weight:700;color:#42525b}
.nav a:hover{color:var(--blue)}
.menu-button{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:12px;padding:8px 12px}
.hero{max-width:var(--max);margin:0 auto;padding:78px 24px 38px;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;padding:7px 13px;border:1px solid #bfcbd0;border-radius:999px;background:#fff;font-size:.83rem;font-weight:800;color:#42525b}
.eyebrow:before{content:"";width:8px;height:8px;background:var(--coral);border-radius:50%}
h1{font-size:clamp(2.4rem,5vw,4.8rem);line-height:1.11;letter-spacing:-.055em;margin:22px 0 24px}
.hero-lead{font-size:1.13rem;color:#44545d;max-width:660px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:13px 20px;font-weight:900;cursor:pointer;transition:.2s}
.btn-primary{background:var(--navy);color:#fff;box-shadow:0 8px 20px rgba(24,59,78,.18)}
.btn-primary:hover{transform:translateY(-1px);background:#0f3042}
.btn-secondary{background:#fff;border:1px solid var(--line)}
.btn-disabled{background:#d9dee1;color:#68747b;cursor:not-allowed;box-shadow:none}
.hero-board{position:relative;background:#fff;border:1px solid var(--line);border-radius:30px;padding:20px;box-shadow:var(--shadow);transform:rotate(1deg)}
.hero-board img{border-radius:18px}
.hero-note{position:absolute;left:-24px;bottom:26px;background:var(--yellow);padding:14px 18px;border-radius:14px;font-weight:900;transform:rotate(-3deg);box-shadow:0 8px 20px rgba(0,0,0,.12)}
.trust-strip{max-width:var(--max);margin:12px auto 50px;padding:0 24px;display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.trust-item{background:#fff;border:1px solid var(--line);border-radius:15px;padding:17px 16px}
.trust-item strong{display:block;font-size:.96rem}
.trust-item span{display:block;color:var(--muted);font-size:.82rem;margin-top:3px}
.section{max-width:var(--max);margin:0 auto;padding:72px 24px}
.section-tight{padding-top:38px;padding-bottom:38px}
.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:28px}
.kicker{font-size:.78rem;font-weight:900;letter-spacing:.12em;color:var(--coral)}
h2{font-size:clamp(1.8rem,3vw,3rem);line-height:1.25;letter-spacing:-.035em;margin:6px 0 0}
.section-desc{max-width:580px;color:var(--muted)}
.principle-grid,.category-grid,.price-grid,.faq-grid{display:grid;gap:18px}
.principle-grid{grid-template-columns:repeat(3,1fr)}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:0 8px 24px rgba(19,42,54,.045)}
.panel-number{font-size:.78rem;font-weight:900;color:var(--blue);letter-spacing:.12em}
.panel h3{font-size:1.16rem;margin:8px 0 8px}
.panel p{margin:0;color:var(--muted);font-size:.94rem}
.category-grid{grid-template-columns:repeat(3,1fr)}
.category-card{position:relative;min-height:196px;overflow:hidden}
.category-card .count{position:absolute;right:18px;top:15px;font-weight:900;font-size:2rem;color:rgba(23,36,44,.14)}
.category-card .sample{font-size:.87rem;color:#56656d;margin-top:14px}
.filters{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px;display:grid;grid-template-columns:minmax(260px,1fr) repeat(3,minmax(130px,190px));gap:12px;margin-bottom:24px;position:sticky;top:76px;z-index:20;box-shadow:0 10px 30px rgba(19,42,54,.06)}
.field{border:1px solid #cfd8dc;background:#fff;border-radius:12px;padding:11px 13px;width:100%}
.results-line{font-size:.9rem;color:var(--muted);margin:4px 0 18px}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;transition:.2s;box-shadow:0 8px 25px rgba(19,42,54,.04)}
.product-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.product-card img{aspect-ratio:4/3;object-fit:cover;background:#edf2f4;border-bottom:1px solid var(--line)}
.product-card-body{padding:20px}
.meta{display:flex;flex-wrap:wrap;gap:7px;align-items:center;font-size:.75rem;font-weight:900;color:#55646d}
.tag{padding:4px 9px;background:#eef3f5;border-radius:999px}
.price{margin-left:auto;font-size:1.25rem;color:var(--navy)}
.aru{font-size:1.23rem;line-height:1.45;font-weight:900;margin:14px 0 4px}
.product-name{font-size:.9rem;color:var(--muted);font-weight:700}
.product-card p{font-size:.89rem;color:#526169;margin:12px 0 0}
.price-grid{grid-template-columns:repeat(3,1fr)}
.price-card{text-align:center;padding:30px}
.price-card .yen{font-size:2.3rem;font-weight:900;color:var(--navy)}
.price-card ul{text-align:left;padding-left:1.2em;color:var(--muted);font-size:.9rem}
.notice{background:#f1eee4;border-left:5px solid var(--yellow);padding:20px 22px;border-radius:6px 15px 15px 6px}
.notice strong{display:block;margin-bottom:4px}
.faq-grid{grid-template-columns:1fr 1fr}
details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px}
summary{font-weight:900;cursor:pointer}
details p{color:var(--muted);font-size:.92rem;margin:12px 0 0}
.footer{margin-top:70px;background:#152f3d;color:#edf5f7}
.footer-inner{max-width:var(--max);margin:auto;padding:48px 24px;display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:38px}
.footer a{color:#d6e4e8}
.footer small{color:#a9c0c7}
.footer-links{display:grid;gap:9px;font-size:.9rem}
.page-hero{max-width:var(--max);margin:auto;padding:54px 24px 24px}
.breadcrumb{font-size:.82rem;color:var(--muted);margin-bottom:18px}
.product-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:start}
.product-hero img{border-radius:24px;border:1px solid var(--line);box-shadow:var(--shadow)}
.product-summary{background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px}
.product-summary h1{font-size:clamp(2rem,4vw,3.35rem);margin:10px 0 8px}
.product-summary .plain-name{color:var(--muted);font-weight:800}
.big-price{font-size:2.2rem;font-weight:900;color:var(--navy);margin:18px 0 4px}
.one-time{font-size:.82rem;color:var(--muted)}
.buy-note{font-size:.82rem;color:var(--muted);margin-top:10px}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.steps{counter-reset:step;display:grid;gap:14px}
.step{counter-increment:step;position:relative;padding:20px 20px 20px 70px;background:#fff;border:1px solid var(--line);border-radius:17px}
.step:before{content:counter(step);position:absolute;left:18px;top:17px;width:38px;height:38px;border-radius:12px;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:900}
.file-table{width:100%;border-collapse:collapse;background:#fff;border-radius:15px;overflow:hidden;border:1px solid var(--line)}
.file-table th,.file-table td{padding:13px 15px;border-bottom:1px solid var(--line);text-align:left;font-size:.91rem}
.file-table th{background:#edf3f5}
.file-table tr:last-child td{border-bottom:0}
.preview-frame{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}
.preview-frame img{border-radius:12px}
.limit-box{background:#fff5ef;border:1px solid #edcabe;border-radius:18px;padding:22px}
.good-box{background:#edf7f0;border:1px solid #c8dfcf;border-radius:18px;padding:22px}
.list-clean{padding-left:1.2em;margin:8px 0}
.contact-form{display:grid;gap:13px;max-width:760px}
.contact-form label{font-weight:800;font-size:.9rem}
.contact-form textarea{min-height:170px}
.status-message{padding:14px;border-radius:12px;display:none}
.status-message.show{display:block}
.status-ok{background:#e8f5eb;color:#245c32}
.status-error{background:#fff0ed;color:#8a3126}
.admin-box{max-width:900px}
.message-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px;margin:12px 0}
@media(max-width:900px){
 .hero,.product-hero{grid-template-columns:1fr}
 .hero-board{max-width:650px}
 .trust-strip{grid-template-columns:1fr 1fr}
 .principle-grid,.category-grid,.product-grid,.price-grid{grid-template-columns:1fr 1fr}
 .filters{grid-template-columns:1fr 1fr;position:static}
 .detail-grid,.faq-grid{grid-template-columns:1fr}
 .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
 .header-inner{padding:11px 15px}.nav{display:none}.menu-button{display:block}
 .hero{padding:50px 18px 25px}.hero-note{left:10px;bottom:10px}.trust-strip{padding:0 18px}
 .section{padding:54px 18px}.section-head{display:block}
 .principle-grid,.category-grid,.product-grid,.price-grid,.trust-strip,.filters{grid-template-columns:1fr}
 .footer-inner{grid-template-columns:1fr;padding:40px 18px}
 .page-hero{padding:35px 18px 18px}.product-summary{padding:21px}
 h1{font-size:2.45rem}
}


@media(max-width:620px){
 .nav.open{display:flex;position:absolute;left:12px;right:12px;top:60px;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;
  box-shadow:var(--shadow)}
}


.prelaunch-banner{
  max-width:1180px;
  margin:20px auto 0;
  padding:13px 18px;
  border:1px solid #d8be6a;
  border-radius:14px;
  background:#fff4c9;
  color:#4e430f;
  font-weight:800;
  text-align:center;
}
.product-question{
  margin-top:14px;
  color:var(--coral);
  font-size:.86rem;
  font-weight:900;
  letter-spacing:.04em;
}
@media(max-width:620px){
  .prelaunch-banner{
    margin:14px 18px 0;
    text-align:left;
    font-size:.9rem;
  }
  .nav.open{
    display:flex;
    position:absolute;
    left:12px;
    right:12px;
    top:60px;
    flex-direction:column;
    background:#fff;
    border:1px solid var(--line);
    border-radius:16px;
    padding:16px;
    box-shadow:var(--shadow);
  }
}

.product-card>a:first-child{display:block;padding:14px;background:#f1f3f4;border-bottom:1px solid var(--line)}
.product-visual{min-height:185px;border-radius:17px;padding:18px;display:flex;flex-direction:column;position:relative;overflow:hidden;background:linear-gradient(145deg,#fff,#eef3f5);border:1px solid rgba(22,45,58,.12)}
.product-visual:after{content:"";position:absolute;width:150px;height:150px;border-radius:50%;right:-52px;bottom:-62px;background:rgba(255,255,255,.28)}
.product-visual-large{min-height:410px;padding:34px;justify-content:center;box-shadow:var(--shadow)}
.visual-top{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;letter-spacing:.05em;position:relative;z-index:1}
.visual-top em{font-style:normal;background:#fff;padding:5px 10px;border-radius:999px;font-weight:900}
.visual-category{margin-top:24px;font-size:.82rem;font-weight:900;opacity:.78;position:relative;z-index:1}
.product-visual strong{font-size:1.23rem;line-height:1.45;margin-top:8px;position:relative;z-index:1}
.product-visual-large strong{font-size:2rem;max-width:85%}
.visual-formats{display:flex;gap:6px;flex-wrap:wrap;margin-top:auto;padding-top:18px;position:relative;z-index:1}
.visual-formats span{background:rgba(255,255,255,.78);padding:4px 8px;border-radius:999px;font-size:.72rem;font-weight:900}
.cat-school{background:linear-gradient(145deg,#e9f3fa,#cfe6f2);color:#173d54}.cat-community{background:linear-gradient(145deg,#edf5ee,#d5e5d9);color:#31513b}.cat-shop{background:linear-gradient(145deg,#fbecef,#f2ccd6);color:#682d3c}.cat-field{background:linear-gradient(145deg,#fff2df,#f5d4a6);color:#58320e}.cat-care{background:linear-gradient(145deg,#f0effa,#dcd9f1);color:#403b79}.cat-office{background:linear-gradient(145deg,#eaf0f5,#cad9e7);color:#233f58}.cat-home{background:linear-gradient(145deg,#fff0eb,#f4d3c7);color:#6b3b30}.cat-creative{background:linear-gradient(145deg,#f4ecfa,#dfccec);color:#51355f}
.preview-frame .product-visual{max-width:780px;margin:auto}.preview-caption{max-width:760px;margin:18px auto 0;color:var(--muted);font-size:.9rem}
@media(max-width:620px){.product-visual-large{min-height:300px;padding:24px}.product-visual-large strong{font-size:1.55rem}}

.hero-catalog{min-height:430px;border-radius:20px;background:linear-gradient(145deg,#173b4e,#2f718c);color:white;padding:42px;display:flex;flex-direction:column;justify-content:center}.hero-catalog span{font-size:.82rem;letter-spacing:.15em;color:#f0c75e;font-weight:900}.hero-catalog strong{font-size:2rem;line-height:1.55;margin:22px 0}.hero-catalog p{color:#d9e7ec;font-weight:800}