:root{--bg:#050505;--fg:#e8e8ef;--mute:#9a9ab0;--line:#24243a;--cyan:#00d2ff;--gold:#ffaa00;--indigo:#4b0082;--card:#0d0d18}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--fg);font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",system-ui,sans-serif;line-height:1.8}
a{color:var(--cyan)}
.wrap{max-width:960px;margin:0 auto;padding-inline:20px}
header.nav{position:sticky;top:0;z-index:10;background:rgba(5,5,5,.85);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
header.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:10px;flex-wrap:wrap}
.brand{font-weight:800;letter-spacing:.12em;color:var(--fg);text-decoration:none;font-size:1.15rem}
.brand span{color:var(--gold)}
.menu-btn{background:none;border:1px solid var(--line);border-radius:8px;width:44px;height:40px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;padding:0}
.menu-btn span{display:block;width:20px;height:2px;background:var(--fg);transition:transform .2s,opacity .2s}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
#menu{position:absolute;top:100%;left:0;right:0;background:rgba(5,5,5,.97);border-bottom:1px solid var(--line);display:flex;flex-direction:column}
#menu a{color:var(--fg);text-decoration:none;padding:14px 20px;border-top:1px solid var(--line);max-width:960px;width:100%;margin:0 auto}
#menu a:hover{color:var(--gold)}
#menu[hidden]{display:none}
.hero{position:relative;display:flex;flex-direction:column;align-items:center;overflow:hidden;border-bottom:1px solid var(--line);padding-block:0 7vh}
#tower{position:relative;width:100%;height:clamp(320px,62vh,640px)}
.hero .copy{position:relative;text-align:center;padding-block:0;pointer-events:none}
.hero h1{font-size:clamp(2.4rem,7vw,4.4rem);letter-spacing:.14em;margin:0;line-height:1.1}
.hero h1 span{color:var(--gold)}
.hero p{font-size:clamp(1rem,2.6vw,1.3rem);color:var(--fg);margin:.6em 0 0;text-shadow:0 0 12px #000}
section{padding-block:64px;border-bottom:1px solid var(--line)}
h2{font-size:1.5rem;margin:0 0 20px;letter-spacing:.06em}
h2::before{content:"";display:inline-block;width:10px;height:10px;background:var(--gold);margin-right:10px;transform:rotate(45deg)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px}
.card h3{margin:0 0 8px;font-size:1.05rem;color:var(--cyan)}
.price{font-size:2rem;font-weight:800;color:var(--gold)}
.note{color:var(--mute);font-size:.88rem}
table.info{width:100%;border-collapse:collapse}
table.info th,table.info td{border-bottom:1px solid var(--line);padding:12px 8px;text-align:left;vertical-align:top}
table.info th{width:32%;color:var(--mute);font-weight:500}
.tbl{overflow-x:auto}
.btn{display:inline-block;padding:12px 22px;border:1px solid var(--gold);color:var(--gold);border-radius:8px;text-decoration:none;font-weight:700}
.btn:hover{background:var(--gold);color:#000}
button.btn{background:none;font:inherit;font-weight:700;cursor:pointer}
button.btn:disabled{opacity:.5;cursor:wait}
.form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 20px;margin-top:24px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:.92rem;font-weight:600}
.req,.opt{display:inline-block;font-size:.7rem;font-weight:700;padding:1px 7px;border-radius:4px;margin-left:8px;vertical-align:2px}
.req{background:var(--gold);color:#000}
.opt{border:1px solid var(--line);color:var(--mute)}
.form input,.form select,.form textarea{width:100%;background:#07070f;color:var(--fg);border:1px solid #33334d;border-radius:8px;padding:11px 12px;font:inherit;font-size:1rem}
.form textarea{resize:vertical;min-height:150px}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(0,210,255,.18)}
.form.tried :invalid{border-color:#ff5c7a}
.form ::placeholder{color:#5c5c78}
.count{font-size:.8rem;color:var(--mute);text-align:right}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400!important}
.check input{width:18px;height:18px;margin-top:5px;accent-color:var(--gold)}
.form.tried .check input:invalid{outline:2px solid #ff5c7a}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.status{margin:12px 0 0;font-weight:600;min-height:1.2em}
.status.ok{color:#5be3a1}
.status.err{color:#ff7a90}
@media (max-width:640px){.form{grid-template-columns:1fr;padding:18px}}
footer{padding-block:32px;color:var(--mute);font-size:.85rem}
footer a{color:var(--mute);margin-right:16px}
.doc{padding-block:48px}
.doc h1{font-size:1.6rem}
.doc h2{font-size:1.15rem;margin-top:32px}
@media (max-width:600px){table.info th{width:40%}}