:root{--washi-50:#fbf8f0;--washi-100:#f7f1e3;--washi-200:#efe5cf;--washi-300:#e6d9b8;--sumi-900:#1e1b22;--sumi-600:#5e5862;--sumi-400:#7a7480;--shu-500:#c23b2c;--shu-700:#a82e22;--shu-300:#e8705f;--kin-500:#c9a24b;--kin-text:#8c6a2b;--kin-200:#f2d58a;--jouka-gold:#ffe29a;--jouka-core:#fffbea;--ai-900:#1a2232;--ai-950:#121826;--ai-700:#1f3a5f;--ai-500:#2f6fa8;--ai-300:#7fa3cf;--techno-400:#4fd2f2;--techno-200:#b6f0ff;--techno-700:#1590be;--kegare-950:#120a18;--kegare-800:#2a1636;--kegare-600:#4b2a5e;--kegare-glow:#a05cf0;--kegare-ember:#e0457b;--tama-core:#eaf7ff;--tama-rim:#8fd0ff;--wakatake-600:#3e8a6b;--wakatake-300:#6fcba3;--sakura-200:#f6d3da;--sakura-400:#e79aab;--font-mincho:"Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", serif;--font-sans:"Zen Kaku Gothic New", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;--font-maru:"Zen Maru Gothic", "Hiragino Maru Gothic ProN", var(--font-sans);--step--1:.8125rem;--step-0:1.0625rem;--step-1:1.4167rem;--step-2:1.8889rem;--step-3:clamp(2rem, 1.4rem + 2.4vw, 2.5185rem);--step-4:clamp(2.3rem, 1.4rem + 3.6vw, 3.358rem);--step-5:clamp(2.8rem, 1.2rem + 6vw, 4.4774rem);--step-6:clamp(3.2rem, .8rem + 9vw, 5.9699rem);--gutter:clamp(16px, 4vw, 48px);--measure:34em;--page-max:1280px;--header-h:64px;--radius-chip:6px;--radius-slot:12px;--radius-card:20px;--radius-sheet:28px;--ease-in:cubic-bezier(.2, .8, .2, 1);--ease-out:cubic-bezier(.4, 0, 1, 1);--ease-spring:cubic-bezier(.34, 1.4, .5, 1);--t-micro:.12s;--t-short:.2s;--t-medium:.32s;--t-long:.5s;--t-ceremony:1.1s;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 16px)}body{min-height:100vh;font-family:var(--font-sans);font-size:var(--step-0);letter-spacing:.02em;color:var(--sumi-900);background:var(--washi-100);font-feature-settings:"palt" 0;-webkit-font-smoothing:antialiased;margin:0;line-height:1.95;overflow-x:clip}img,svg,video,canvas{max-width:100%;display:block}img{height:auto}button{font:inherit;color:inherit;cursor:pointer}a{color:inherit}h1,h2,h3,h4,p,figure,blockquote,ul,ol,dl,dd{margin:0}:where(ul[role=list],ol[role=list]){padding:0;list-style:none}:focus-visible{outline:2px solid var(--shu-500);outline-offset:3px;border-radius:4px}.mode-lens :focus-visible{outline-color:var(--kin-200)}::selection{background:var(--shu-500);color:var(--washi-50)}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}.skip-link{z-index:100;background:var(--sumi-900);color:var(--washi-50);border-radius:var(--radius-chip);transition:top var(--t-short) var(--ease-in);padding:8px 16px;position:fixed;top:-60px;left:16px}.skip-link:focus{top:12px}.mincho,h1,h2,h3{font-family:var(--font-mincho);letter-spacing:.06em;font-weight:700;line-height:1.45}h1,h2,h3,.lead,p{word-break:auto-phrase}h3{font-size:var(--step-2)}.lead{font-size:var(--step-1);line-height:1.85;font-family:var(--font-mincho);letter-spacing:.04em;font-weight:500}.prose{max-width:var(--measure)}.prose p+p{margin-top:1em}.small{font-size:var(--step--1);line-height:1.8}.maru{font-family:var(--font-maru);font-weight:500}.num{font-feature-settings:"tnum" 1;font-variant-numeric:tabular-nums}.mode-paper{background-color:var(--washi-100);color:var(--sumi-900);isolation:isolate;position:relative}.mode-paper:before{content:"";z-index:-1;pointer-events:none;opacity:.55;mix-blend-mode:multiply;background:url(../img/texture/washi.webp) 50%/512px;position:absolute;inset:0}.mode-lens{color:var(--washi-100);background:radial-gradient(120% 70% at 80% 0%, #2f6fa847, transparent 60%), radial-gradient(90% 60% at 10% 100%, #4b2a5e73, transparent 65%), linear-gradient(180deg, var(--ai-900), var(--ai-950));isolation:isolate;position:relative}.mode-lens:before{content:"";z-index:-1;pointer-events:none;opacity:.18;mix-blend-mode:screen;background:url(../img/texture/washi-night.webp) 50%/512px;position:absolute;inset:0}.mode-lens .muted{color:#b9b2a3}.mode-paper .muted{color:var(--sumi-600)}.wrap{width:min(100% - 2 * var(--gutter), var(--page-max));margin-inline:auto}.section{padding-block:clamp(80px,12vw,168px)}.chapter{grid-template-columns:minmax(88px,140px) 1fr;align-items:start;gap:clamp(24px,5vw,72px);display:grid}.chapter-rail{top:calc(var(--header-h) + 32px);flex-direction:column;align-items:center;gap:20px;display:flex;position:sticky}.chapter-title{writing-mode:vertical-rl;font-size:var(--step-5);letter-spacing:.18em;font-weight:800;line-height:1.15}.chapter-seal{background:var(--shu-500);width:64px;height:64px;-webkit-mask:var(--seal) center / contain no-repeat;-webkit-mask:var(--seal) center / contain no-repeat;mask:var(--seal) center / contain no-repeat;transform:rotate(-6deg)}.mode-lens .chapter-seal{background:var(--kin-200)}.chapter-body{min-width:0}.chapter-body>.lead{max-width:30em}@media (max-width:760px){.chapter{grid-template-columns:1fr;gap:28px}.chapter-rail{flex-direction:row;justify-content:flex-start;align-items:center;gap:14px;position:static}.chapter-title{writing-mode:horizontal-tb;font-size:var(--step-4);letter-spacing:.12em}.chapter-seal{width:44px;height:44px}}.site-header{z-index:50;height:var(--header-h);color:var(--washi-50);transition:background-color var(--t-medium) var(--ease-in), color var(--t-medium) var(--ease-in), box-shadow var(--t-medium);align-items:center;display:flex;position:fixed;inset:0 0 auto}.site-header[data-solid]{background:color-mix(in srgb, var(--washi-50) 86%, transparent);-webkit-backdrop-filter:blur(14px)saturate(1.2);backdrop-filter:blur(14px)saturate(1.2);color:var(--sumi-900);box-shadow:0 1px #c9a24b73}.site-header[data-solid][data-mode=lens]{background:color-mix(in srgb, var(--ai-900) 82%, transparent);color:var(--washi-100)}.site-header .wrap{align-items:center;gap:20px;display:flex}.brand{flex:none;align-items:center;gap:10px;text-decoration:none;display:flex}.brand img{border-radius:9px;width:36px;height:36px;box-shadow:0 1px 4px #120a1840}.brand span{font-family:var(--font-mincho);letter-spacing:.16em;font-size:1.2rem;font-weight:800}.nav{align-items:center;gap:4px;margin-left:auto;display:flex}.nav a{letter-spacing:.08em;border-radius:999px;padding:8px 12px;font-size:.95rem;font-weight:500;text-decoration:none;position:relative}.nav a:after{content:"";transform-origin:0;height:1.5px;transition:transform var(--t-short) var(--ease-in);background:currentColor;position:absolute;bottom:4px;left:12px;right:12px;transform:scaleX(0)}.nav a:hover:after,.nav a[aria-current=page]:after{transform:scaleX(1)}.nav a[aria-current=page]{color:var(--shu-500)}.site-header:not([data-solid]) .nav a[aria-current=page],.site-header[data-mode=lens] .nav a[aria-current=page]{color:var(--kin-200)}.sound-toggle{border:1px solid color-mix(in srgb, currentColor 35%, transparent);background:0 0;border-radius:50%;flex:none;place-items:center;width:40px;height:40px;display:inline-grid}.sound-toggle svg{width:20px;height:20px}.sound-toggle[aria-pressed=false] .wave{opacity:0}.nav-toggle{display:none}@media (max-width:900px){.nav-toggle{background:0 0;border:0;place-items:center;width:40px;height:40px;margin-left:auto;display:inline-grid}.nav{inset:var(--header-h) 0 auto 0;padding:12px var(--gutter) 24px;background:color-mix(in srgb, var(--washi-50) 96%, transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);color:var(--sumi-900);opacity:0;visibility:hidden;transition:opacity var(--t-short), transform var(--t-short) var(--ease-in), visibility 0s linear var(--t-short);flex-direction:column;align-items:stretch;gap:0;margin:0;position:fixed;transform:translateY(-8px);box-shadow:0 12px 30px #1e1b221f}.nav[data-open]{opacity:1;visibility:visible;transition-delay:0s;transform:none}.nav a{border-bottom:1px solid var(--washi-300);border-radius:0;padding:14px 4px;font-size:1.05rem}.nav a:after{display:none}.nav a[aria-current=page]{color:var(--shu-500)!important}}.slot-tag{letter-spacing:.08em;vertical-align:1px;color:var(--washi-50);background:var(--shu-500);border-radius:6px;margin-right:8px;padding:0 8px;font-size:.75rem;font-weight:700;line-height:1.7;display:inline-block}.slot-tag[data-role=support]{background:var(--wakatake-600)}.btn{--btn-bg:var(--shu-500);--btn-fg:var(--washi-50);background:var(--btn-bg);min-height:48px;color:var(--btn-fg);letter-spacing:.08em;box-shadow:0 3px 0 var(--shu-700), 0 10px 24px #c23b2c38;transition:transform var(--t-micro) var(--ease-in), box-shadow var(--t-micro);border:0;border-radius:14px;justify-content:center;align-items:center;gap:10px;padding:10px 24px;font-weight:700;text-decoration:none;display:inline-flex}.btn:hover{transform:translateY(-1px)}.btn:active{box-shadow:0 1px 0 var(--shu-700), 0 4px 10px #c23b2c33;transform:translateY(2px)}.btn-quiet{--btn-bg:transparent;--btn-fg:currentColor;box-shadow:inset 0 0 0 1.5px color-mix(in srgb, currentColor 40%, transparent)}.btn-quiet:active{box-shadow:inset 0 0 0 1.5px}.btn-gold{--btn-bg:linear-gradient(180deg, #f6dc94, var(--kin-500));--btn-fg:var(--sumi-900);box-shadow:0 3px #9c7a2e,0 10px 28px #f2d58a40}.phone{--phone-w:320px;width:var(--phone-w);aspect-ratio:9/19.5;border-radius:calc(var(--phone-w) * .15);padding:calc(var(--phone-w) * .035);background:linear-gradient(145deg,#2b2733,#0f0d13 60%,#2b2733);position:relative;box-shadow:inset 0 0 0 1.5px #ffffff1f,0 30px 60px #120a1859,0 8px 18px #120a1840}.phone-screen{border-radius:calc(var(--phone-w) * .12);background:var(--ai-900);isolation:isolate;width:100%;height:100%;position:relative;overflow:hidden}.phone-screen:after{content:"";z-index:20;pointer-events:none;background:#050407;border-radius:99px;width:31%;height:3.6%;position:absolute;top:2.2%;left:50%;transform:translate(-50%)}.screen{--phone-w:clamp(200px, 22vw, 280px);justify-items:center;gap:12px;margin:0;display:grid}.screen[hidden]{display:none}.screen-phone{--phone-w:inherit}.screen video{object-fit:cover;background:var(--ai-900);width:100%;height:100%;position:absolute;inset:0}.screen.is-short video{object-fit:contain;object-position:50% 0;background:#f6efdf}.screen figcaption{max-width:calc(var(--phone-w) + 40px);text-align:center;color:var(--sumi-600);letter-spacing:.03em;font-size:.86rem;line-height:1.7}.mode-lens .screen figcaption{color:#f7f1e3bf}.screen-play{z-index:21;width:64px;height:64px;color:var(--sumi-900);background:#fbf8f0eb;border:0;border-radius:50%;place-items:center;margin:-32px 0 0 -32px;display:grid;position:absolute;top:50%;left:50%;box-shadow:0 8px 24px #120a1859}.screen-play svg{width:28px;height:28px;margin-left:4px}.screen-play[hidden]{display:none}.screen-row{overscroll-behavior-x:contain;scroll-snap-type:x mandatory;grid-auto-columns:max-content;grid-auto-flow:column;justify-content:start;gap:clamp(16px,3vw,36px);margin-top:clamp(28px,4vw,48px);padding:8px 4px 20px;display:grid;overflow-x:auto}.screen-row>.screen{scroll-snap-align:center;--phone-w:clamp(180px, 17vw, 236px)}.screen-note{color:var(--sumi-400);letter-spacing:.04em;margin-top:4px;font-size:.8rem}.mode-lens .screen-note{color:#f7f1e38c}@media (prefers-reduced-motion:no-preference){[data-reveal]{opacity:0;transition:opacity .7s var(--ease-in), transform .7s var(--ease-in);transform:translateY(18px)}[data-reveal].is-in{opacity:1;transform:none}}.site-footer{background:var(--sumi-900);color:#cfc7b6;font-size:var(--step--1);padding-block:72px 48px}.site-footer .wrap{gap:28px;display:grid}.site-footer .foot-brand{align-items:center;gap:14px;display:flex}.site-footer .foot-brand img{border-radius:11px;width:48px;height:48px}.site-footer .foot-brand p{line-height:1.5;display:grid}.site-footer .foot-brand b{font-family:var(--font-mincho);letter-spacing:.16em;color:var(--kin-200);font-size:1.25rem}.site-footer .foot-brand span{font-family:var(--font-mincho);letter-spacing:.2em;color:#b9b2a3;font-size:.8rem}.site-footer nav{flex-wrap:wrap;gap:8px 24px;display:flex}.site-footer nav a{color:var(--washi-100);text-decoration:none}.site-footer nav a:hover{color:var(--kin-200)}.site-footer .legal{color:#9a9284;max-width:60em;line-height:1.9}.site-footer .foot-legal{gap:6px 20px;margin-top:-12px}.site-footer .foot-legal a{color:#b9b2a3;text-underline-offset:3px;font-size:.78rem;-webkit-text-decoration:underline #b9b2a366;text-decoration:underline #b9b2a366}.site-footer .foot-legal a:hover{color:var(--kin-200)}.site-footer .foot-legal a[aria-current=page]{color:var(--kin-200);text-decoration:none}@view-transition{navigation:auto}@media (prefers-reduced-motion:no-preference){::view-transition-old(root){animation:.52s var(--ease-out) both fade-out}::view-transition-new(root){animation:.76s var(--ease-in) both ink-open;-webkit-mask:url(../img/vfx/ink-burst.webp) 50%/0% no-repeat,linear-gradient(#000 0 0) 50%/0% no-repeat;mask:url(../img/vfx/ink-burst.webp) 50%/0% no-repeat,linear-gradient(#000 0 0) 50%/0% no-repeat}}@keyframes fade-out{to{opacity:.4;filter:saturate(.6)}}@keyframes ink-open{0%{-webkit-mask-size:0%,0%;mask-size:0%,0%}70%{-webkit-mask-size:420%,0%;mask-size:420%,0%}to{-webkit-mask-size:600%,300%;mask-size:600%,300%}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:1ms!important;animation-duration:1ms!important;animation-iteration-count:1!important}}