:root{--bg: #ffffff;--panel: #f6f7f9;--text: #1c1f24;--muted: #5f6672;--line: #d9dde3;--accent: #2f6fdf;--btn: #2f6fdf;--shadow: 0 12px 40px rgba(20, 30, 50, .14);--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--bg: #15171b;--panel: #1d2026;--text: #e8eaee;--muted: #9aa1ad;--line: #333842;--accent: #6d9dff;--shadow: 0 12px 40px rgba(0, 0, 0, .45)}}html:not([lang=ja]) .ja,html[lang=ja] .en{display:none}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;line-height:1.7}a{color:var(--accent)}.head-in,.main,.foot{width:100%;max-width:920px;margin:0 auto;padding:16px}.head{position:sticky;top:0;z-index:10;border-bottom:1px solid transparent;transition:background-color .2s,border-color .2s}.head.show{background:color-mix(in srgb,var(--bg) 86%,transparent);border-bottom-color:var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.head-in{display:flex;align-items:center;justify-content:space-between;padding-top:12px;padding-bottom:12px}.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text);text-decoration:none;transition:opacity .2s,transform .2s,visibility .2s}.js .head.home:not(.show) .logo{opacity:0;visibility:hidden;transform:translateY(-4px)}.mark{display:block;flex:none;width:28px;height:28px;background:var(--text);-webkit-mask:url(/mark.png) center / contain no-repeat;mask:url(/mark.png) center / contain no-repeat}.lang{display:flex;gap:4px}.lang button{padding:4px 10px;border:1px solid var(--line);border-radius:6px;background:transparent;color:var(--muted);font:inherit;font-size:13px;cursor:pointer}.lang button[aria-pressed=true]{color:var(--text);border-color:var(--text)}.main{flex:1}.muted{color:var(--muted);font-size:14px}.btn{display:inline-block;padding:10px 22px;border:0;border-radius:8px;background:var(--btn);color:#fff;font:inherit;font-weight:600;cursor:pointer;text-decoration:none}.btn:hover{filter:brightness(1.08)}.btn:disabled{background:var(--line);color:var(--muted);cursor:not-allowed;filter:none}.btn-lg{padding:12px 30px;font-size:16px}.btn-quiet{background:transparent;color:var(--text);border:1px solid var(--line)}.hero{text-align:center;padding:40px 0 36px}.hero-mark{width:128px;height:128px;margin:0 auto 22px}.hero h1{font-size:clamp(36px,8vw,56px);margin:0;letter-spacing:-.02em;line-height:1.2}.tagline{font-size:19px;margin:12px 0 24px}.cta{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:4px}.hero-paid{margin:4px 0 0;font-size:14px}.hero-paid a{font-weight:600;text-decoration:none}.hero-paid a:hover{text-decoration:underline}.block{margin:0 0 64px;scroll-margin-top:72px}.block>h2{font-size:24px;margin:0 0 20px;text-align:center}.shot{margin:0 auto 64px;max-width:880px;text-align:center}.shot figcaption{margin-top:8px;font-size:12px}.player-frame{aspect-ratio:1280 / 760;overflow:hidden;border:1px solid var(--line);border-radius:12px;background:#13213a;box-shadow:var(--shadow)}.player-frame video{display:block;width:100%;height:100%;object-fit:cover}.player-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:12px}.player-tabs button{position:relative;overflow:hidden;padding:9px 8px 11px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--muted);font:inherit;font-size:13px;cursor:pointer}.player-tabs button[aria-selected=true]{color:var(--text);border-color:var(--accent)}.player-tabs button i{position:absolute;left:0;bottom:0;height:3px;width:calc(var(--p, 0) * 100%);background:var(--accent)}.player-tabs button[aria-selected=false] i{display:none}@media(max-width:600px){.player-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px}.feature{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:var(--panel)}.feature h3,.steps h3{margin:0 0 4px;font-size:16px}.feature p,.steps p{margin:0;color:var(--muted);font-size:14px}.how{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.steps{list-style:none;counter-reset:step;margin:0;padding:0}.steps li{counter-increment:step;position:relative;padding:0 0 16px 42px}.steps li:last-child{padding-bottom:0}.steps li:before{content:counter(step);position:absolute;left:0;top:1px;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--btn);color:#fff;font-size:13px;font-weight:700}.code{margin:0;padding:18px 20px;border-radius:12px;background:#0f1216;color:#e6e9ef;font:13px/1.8 var(--mono);overflow-x:auto}.code .k{color:#c9a0ff}.code .f{color:#7fb4ff}.code .s{color:#a8dd8a}.plans{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:16px;align-items:start}@media(max-width:700px){.plans{grid-template-columns:1fr}}.plan.plan-main{border:2px solid var(--accent)}.plan.plan-free{background:transparent;color:var(--muted);font-size:14px}.plan.plan-free h2{font-size:17px;color:var(--text)}.plan.plan-free .points li:before{color:var(--muted)}.plan.plan-free .muted{margin:8px 0 0;font-size:12px}.badge{display:inline-block;vertical-align:middle;margin-left:6px;padding:1px 8px;border:1px solid var(--line);border-radius:999px;font-size:12px;font-weight:600;color:var(--muted)}.plan{border:1px solid var(--line);border-radius:12px;padding:20px;background:var(--panel)}.plan h2{margin:0 0 8px;font-size:20px}.plan ul{padding-left:1.2em;margin:12px 0 0}.plan .points{list-style:none;padding:0;margin:12px 0 16px}.plan .points li{position:relative;margin:4px 0;padding-left:1.5em}.plan .points li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.price{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:10px 0;border-top:1px solid var(--line)}.price>span{font-weight:600;min-width:4em}.price strong{font-size:20px}.price small{font-size:13px;font-weight:400;color:var(--muted);margin-left:2px}.price .btn{margin-left:auto;padding:6px 18px}@media(max-width:700px){.how{grid-template-columns:1fr}}.legal{overflow-wrap:anywhere}.legal h1{font-size:26px;margin:16px 0}.legal h2{font-size:19px;margin:28px 0 8px}.legal h3{font-size:16px;margin:20px 0 6px}.table{overflow-x:auto}.legal table{border-collapse:collapse;width:100%;font-size:14px}.legal th,.legal td{border:1px solid var(--line);padding:6px 10px;text-align:left;vertical-align:top}.legal td:first-child{white-space:nowrap}.foot{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:13px;color:var(--muted);border-top:1px solid var(--line)}.foot a{color:var(--muted)}