* { box-sizing: border-box; }
:root {
  --bg:#0b0f14; --surface:#121821; --surface2:#19212c; --line:rgba(255,255,255,.10);
  --text:#f6f8fb; --muted:#97a4b5; --yellow:#ffd43b; --blue:#26a8ff; --green:#30d17d;
}
html { scroll-behavior:smooth; background:var(--bg); }
body { margin:0; background:var(--bg); color:var(--text); font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Yu Gothic",Meiryo,sans-serif; line-height:1.75; }
a { color:#83d2ff; }
.info-header { position:sticky; top:0; z-index:20; display:flex; align-items:center; justify-content:space-between; gap:12px; padding:12px clamp(14px,3vw,32px); background:rgba(11,15,20,.94); border-bottom:1px solid var(--line); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px); }
.brand { display:grid; gap:1px; min-width:0; }
.brand small { color:var(--yellow); font-size:9px; font-weight:900; letter-spacing:.24em; }
.brand strong { font-size:clamp(15px,3vw,21px); letter-spacing:.04em; white-space:nowrap; }
.back-link { flex:0 0 auto; display:inline-flex; align-items:center; min-height:36px; padding:0 12px; border:1px solid rgba(38,168,255,.35); border-radius:10px; background:rgba(38,168,255,.10); color:#d9f2ff; font-size:12px; font-weight:900; text-decoration:none; }
.hero { padding:32px clamp(16px,5vw,44px) 26px; background:radial-gradient(circle at 12% 0%,rgba(38,168,255,.16),transparent 35%); border-bottom:1px solid var(--line); }
.hero .kicker { margin:0 0 7px; color:var(--yellow); font-size:11px; font-weight:900; letter-spacing:.2em; }
.hero h1 { margin:0; font-size:clamp(28px,7vw,46px); line-height:1.15; }
.hero p { max-width:760px; margin:12px 0 0; color:#b7c2d0; }
.toc { display:flex; gap:8px; overflow:auto; padding:12px clamp(14px,4vw,32px); background:#0d1218; border-bottom:1px solid var(--line); scrollbar-width:none; }
.toc::-webkit-scrollbar{display:none}.toc a{flex:0 0 auto;padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:#d9e2ee;font-size:12px;font-weight:800;text-decoration:none}
.content { width:min(980px,100%); margin:0 auto; padding:20px 14px 120px; }
.quick { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; margin-bottom:24px; }
.quick-card { padding:15px; border:1px solid var(--line); border-radius:14px; background:linear-gradient(180deg,#151d27,#10161e); }
.quick-card b { display:block; color:var(--yellow); margin-bottom:5px; }
.section { scroll-margin-top:80px; margin:0 0 18px; padding:18px; border:1px solid var(--line); border-radius:18px; background:linear-gradient(180deg,#121821,#0e141b); box-shadow:0 12px 35px rgba(0,0,0,.18); }
.section h2 { display:flex; align-items:center; gap:10px; margin:0 0 12px; font-size:20px; }
.step-num { display:grid; place-items:center; width:30px; height:30px; border-radius:50%; background:var(--yellow); color:#141006; font-size:14px; }
.section p { margin:8px 0; color:#c4ceda; }
.section ul,.section ol { margin:8px 0 0; padding-left:1.4em; color:#d2dae4; }
.section li+li { margin-top:6px; }
.tip { margin:14px 0 0; padding:12px 14px; border-left:4px solid var(--blue); border-radius:0 10px 10px 0; background:rgba(38,168,255,.08); color:#d8efff; }
.warn { border-left-color:var(--yellow); background:rgba(255,212,59,.08); color:#fff0b0; }
.shot-grid { display:grid; grid-template-columns:minmax(0,360px) minmax(0,1fr); gap:18px; align-items:start; margin-top:14px; }
.shot { width:100%; max-height:650px; object-fit:contain; object-position:top; border:1px solid rgba(255,255,255,.12); border-radius:14px; background:#080b0f; box-shadow:0 12px 35px rgba(0,0,0,.26); }
.label { display:inline-flex; margin-bottom:8px; padding:5px 9px; border-radius:999px; background:rgba(48,209,125,.10); border:1px solid rgba(48,209,125,.25); color:#aef7cf; font-size:11px; font-weight:900; }
.terms-nav { display:flex; gap:8px; flex-wrap:wrap; margin-top:18px; }
.terms-nav a { padding:8px 10px; border:1px solid var(--line); border-radius:8px; background:var(--surface); color:#dce6f2; text-decoration:none; font-size:12px; }
.terms h2 { margin-top:28px; padding-top:6px; font-size:19px; color:#fff; border-top:1px solid var(--line); }
.terms h2:first-of-type { border-top:0; margin-top:10px; }
.terms p,.terms li { color:#c4ceda; }
.effective { padding:12px 14px; border:1px solid rgba(255,212,59,.2); border-radius:12px; background:rgba(255,212,59,.06); color:#ffec9c; }
.bottom-back { position:fixed; left:50%; bottom:max(12px,env(safe-area-inset-bottom)); z-index:30; transform:translateX(-50%); width:min(calc(100vw - 24px),520px); min-height:48px; display:grid; place-items:center; border:1px solid rgba(38,168,255,.45); border-radius:14px; background:linear-gradient(180deg,#2d9de3,#1476b7); color:#fff; font-weight:900; text-decoration:none; box-shadow:0 14px 40px rgba(0,0,0,.4); }
.site-footer { padding:28px 16px 90px; color:#8290a3; text-align:center; font-size:12px; border-top:1px solid var(--line); }
.site-footer a { margin:0 6px; color:#aebdcd; }
@media(max-width:720px){.quick{grid-template-columns:1fr}.shot-grid{grid-template-columns:1fr}.section{padding:15px}.shot{max-height:none}.hero{padding-top:25px}.info-header{padding:10px 12px}.brand strong{font-size:15px}}