:root{--bg:#05080d;--surface:#0b111b;--surface-2:#101a29;--text:#f4f8ff;--muted:#91a0b5;--blue:#00a6fe;--blue-2:#006bff;--line:#96bee626}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);margin:0;font-family:Arial,Noto Sans JP,sans-serif;font-size:16px;line-height:1.75}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:min(1180px,100% - 48px);margin-inline:auto}.site-header{z-index:30;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);background:#05080ddb;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:30px;height:78px;display:flex}.brand{letter-spacing:.02em;align-items:center;gap:11px;font-weight:700;line-height:1;display:flex}.brand 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h1{letter-spacing:-.04em;max-width:980px;margin:14px 0 0;font-size:clamp(2.25rem,5vw,4.3rem);line-height:1.2}.faq-article{max-width:950px;padding-block:70px}.answer-card{background:var(--surface);border:1px solid var(--line);padding:46px}.answer-label{color:var(--blue);letter-spacing:.2em;font-size:11px;font-weight:700}.answer-card p{color:#c1cddd;margin:24px 0 0;font-size:18px;line-height:2}.helpful-box{border:1px solid var(--line);justify-content:space-between;align-items:center;gap:30px;margin-top:28px;padding:28px;display:flex}.helpful-box strong{font-size:18px}.helpful-box p{color:var(--muted);margin:5px 0 0}.helpful-box a{color:var(--blue);white-space:nowrap;align-items:center;gap:8px;font-weight:700;display:inline-flex}.related-section{margin-top:75px}.related-section h2{margin:8px 0 25px;font-size:30px}.related-section .faq-list a{grid-template-columns:1fr auto;padding-inline:0}.support-grid{background:var(--line);border:1px solid 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