:root{color-scheme:light;--ink:#14284b;--blue:#073bc5;--blue-dark:#082c98;--cream:#f9f7f1;--muted:#526173}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--cream);color:var(--ink);font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",Meiryo,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #ed6d5a;outline-offset:4px}img{max-width:100%;display:block}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:absolute;left:12px;top:-60px;z-index:100;padding:10px 16px;background:#fff;border:2px solid var(--blue)}.skip:focus{top:8px}
.site-header{height:84px;padding:0 clamp(24px,5vw,80px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e9e7e1;position:relative;z-index:3;background:var(--cream)}.brand{display:inline-flex;align-items:center;gap:11px;font-size:18px;font-weight:900;letter-spacing:-.04em;white-space:nowrap}.brand img{object-fit:contain}.site-header nav{display:flex;align-items:center;gap:clamp(20px,3vw,42px)}.nav-link{font-size:14px;font-weight:700}.nav-link:hover,.text-link:hover{color:var(--blue)}.nav-cta{display:inline-flex;align-items:center;gap:22px;padding:11px 15px 11px 20px;background:var(--ink);color:#fff;border-radius:999px;font-weight:800;font-size:14px;transition:transform .22s,background .22s}.nav-cta:hover,.button:hover{transform:translateY(-3px)}.nav-cta:hover{background:var(--blue)}.nav-cta span{font-size:21px;font-weight:400;line-height:1}
.hero{position:relative;min-height:min(740px,calc(100svh - 84px));overflow:hidden}.hero-inner{max-width:1450px;margin:auto;padding:clamp(48px,6vw,88px) clamp(24px,5vw,80px) 84px;display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);align-items:center;gap:clamp(24px,4vw,70px)}.hero-copy{position:relative;z-index:1}.eyebrow{display:flex;align-items:center;gap:11px;margin:0 0 31px;font-size:11px;letter-spacing:.2em;font-weight:800;color:var(--blue)}.eyebrow-line{width:25px;height:2px;background:var(--blue)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(46px,5.25vw,88px);line-height:1.32;letter-spacing:-.095em;font-weight:900;margin-bottom:28px;white-space:nowrap}h1 span{color:var(--blue)}.hero-lead{font-size:clamp(16px,1.35vw,19px);line-height:2;letter-spacing:-.025em;font-weight:600;margin-bottom:32px}.hero-actions{display:flex;align-items:center;gap:22px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:34px;border:0;border-radius:999px;padding:16px 18px 16px 26px;min-height:56px;font-size:16px;font-weight:800;cursor:pointer;transition:transform .22s,box-shadow .22s;background:var(--blue);color:white;box-shadow:0 5px 0 var(--blue-dark)}.button:hover{box-shadow:0 8px 0 var(--blue-dark)}.button span{font-size:22px;font-weight:400;line-height:1}.hero-note{font-size:12px;font-weight:700;color:var(--muted)}
.hero-art{position:relative;aspect-ratio:1 / .93;display:grid;place-items:center;isolation:isolate}.hero-art-back{position:absolute;inset:7% 3% 2% 10%;border-radius:46% 54% 44% 56%/50% 44% 56% 50%;background:#dceadf;transform:rotate(-9deg);z-index:-2}.hero-art::before{content:"";position:absolute;width:74%;height:80%;right:3%;bottom:3%;background:#e9edff;border-radius:38% 62% 47% 53%/52% 44% 56% 48%;transform:rotate(13deg);z-index:-1}.hero-cover{width:min(100%,590px);height:auto;aspect-ratio:1;object-fit:cover;border-radius:24px;transform:rotate(-5deg);box-shadow:0 25px 60px #17264b1b;animation:arrive 700ms both}.hero-card{position:absolute;bottom:-4%;left:-5%;width:205px;min-height:159px;background:#fff;border:1px solid #dfe4e5;border-radius:16px;box-shadow:0 18px 42px #10234e22;padding:19px 18px 13px;display:grid;grid-template-columns:12px 1fr auto;align-content:start;column-gap:7px;font-size:12px;font-weight:800;transform:rotate(6deg)}.hero-card-dot{height:8px;width:8px;margin-top:4px;background:#ef6a56;border-radius:50%}.hero-card strong{grid-column:1/-1;font-size:20px;line-height:1.45;letter-spacing:-.05em;margin-top:19px}.hero-card-arrow{grid-column:3;align-self:end;font-size:24px;font-weight:400;color:var(--blue)}.scroll-cue{position:absolute;bottom:30px;left:clamp(24px,5vw,80px);display:flex;align-items:center;gap:13px;font-size:11px;letter-spacing:.13em;font-weight:800}.scroll-cue span{font-size:19px;color:var(--blue)}
.practice-section{padding:clamp(80px,9vw,150px) clamp(24px,5vw,80px) 115px;background:#fff}.section-heading{text-align:center;max-width:600px;margin:0 auto 55px}.section-kicker{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.11em;margin-bottom:19px}.section-heading h2,.modes-intro h2,.closing h2{font-size:clamp(35px,4vw,58px);line-height:1.35;letter-spacing:-.08em;font-weight:900;margin-bottom:18px}.section-heading>p:last-child{font-size:16px;line-height:1.85;color:var(--muted);font-weight:600}.exercise{max-width:830px;margin:auto;border:1px solid #e7e6e0;background:#fdfbf6;border-radius:29px;padding:clamp(22px,4vw,46px);box-shadow:0 22px 80px #14284b0b}.exercise-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.exercise-label{background:#e3ebff;color:var(--blue);padding:8px 14px;border-radius:999px;font-size:12px;font-weight:800}.exercise-progress{display:flex;gap:5px}.exercise-progress i{display:block;width:7px;height:7px;background:#d3dbe8;border-radius:50%}.exercise-progress i:first-child{width:26px;border-radius:99px;background:var(--blue)}.exercise h3{font-size:clamp(24px,3vw,37px);line-height:1.4;letter-spacing:-.065em;font-weight:900;margin-bottom:7px}.exercise-hint{font-size:13px;color:var(--muted);margin-bottom:26px}.exercise-table{display:grid;gap:9px}.exercise-head,.exercise-row{display:grid;grid-template-columns:93px minmax(0,1fr) minmax(0,1fr) 105px;gap:9px;align-items:center}.exercise-head{font-weight:700;font-size:12px;color:var(--muted);padding:0 14px}.exercise-head small{font-size:10px}.exercise-row{background:#fff;border:1px solid #dfe3e7;border-radius:13px;padding:11px 14px;min-height:76px}.period{font-size:14px;font-weight:800;white-space:nowrap}.exercise-row label{min-width:0}.exercise-row input{width:100%;height:45px;border:1px solid #c8d0d7;border-radius:8px;padding:0 12px;color:var(--ink);font-size:17px;font-weight:700;background:#fff}.exercise-row input::placeholder{color:#afb9c6;font-weight:500}.subtotal{font-size:12px;font-weight:800;text-align:right;white-space:nowrap}.exercise-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:21px}.total{display:flex;align-items:baseline;gap:22px;font-size:16px;font-weight:900}.total output{font-size:26px;color:var(--blue);white-space:nowrap}.total small{font-size:14px}.button-dark{background:var(--ink);box-shadow:0 4px 0 #071627;font-size:13px;padding:11px 17px 11px 20px;min-height:46px;gap:14px}.button-dark:hover{box-shadow:0 7px 0 #071627}.text-link{display:flex;width:max-content;align-items:center;gap:15px;margin:35px auto 0;font-size:15px;font-weight:800;border-bottom:2px solid currentColor;padding-bottom:5px}.text-link span{font-size:20px;font-weight:400}
.modes-section{padding:clamp(82px,9vw,135px) clamp(24px,5vw,80px) clamp(95px,10vw,155px);max-width:1450px;margin:auto}.modes-intro{margin-bottom:39px}.modes-intro h2{margin-bottom:0}.mode-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.mode{position:relative;display:grid;grid-template-columns:1fr auto;align-items:end;min-height:270px;border:1px solid #182a4b0b;border-radius:24px;padding:24px;overflow:hidden;transition:transform .28s,box-shadow .28s}.mode:hover{transform:translateY(-6px);box-shadow:0 16px 32px #182a4b13}.mode-blue{background:#e4edfc}.mode-green{background:#e3f2eb}.mode-yellow{background:#fff1d5}.mode-pink{background:#fce9ea}.mode-purple{background:#eceafa}.mode-aqua{background:#e8f3f6}.mode-title{z-index:1;font-size:23px;line-height:1;font-weight:900;letter-spacing:-.06em}.mode-arrow{z-index:1;color:var(--blue);font-size:25px;line-height:.8}.mode-art{position:absolute;top:13px;left:50%;height:188px;width:188px;transform:translateX(-50%);background-image:url('/assets/channel-art-v2.webp');background-size:300% 200%;background-repeat:no-repeat;mix-blend-mode:multiply;filter:saturate(1.03);transition:transform .28s}.mode:hover .mode-art{transform:translateX(-50%) translateY(-5px) scale(1.06)}.art-one{background-position:0 0}.art-two{background-position:50% 0}.art-three{background-position:100% 0}.art-four{background-position:0 100%}.art-five{background-position:50% 100%}.art-six{background-position:100% 100%}
.closing{background:#dcebe6;overflow:hidden}.closing-inner{max-width:1450px;margin:auto;min-height:560px;padding:90px clamp(24px,5vw,80px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);align-items:center;position:relative}.closing-star{position:absolute;left:50%;top:75px;font-size:59px;color:var(--blue);transform:rotate(20deg)}.closing h2{margin-bottom:20px}.closing p:not(.section-kicker){font-size:16px;line-height:1.9;font-weight:600;margin-bottom:34px}.closing-image{width:100%;max-width:475px;justify-self:end;transform:rotate(9deg);overflow:hidden;border-radius:32px;box-shadow:0 26px 70px #103c6125}.closing-image img{width:100%;height:auto}footer{min-height:90px;padding:25px clamp(24px,5vw,80px);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:11px;color:var(--muted)}.footer-brand{font-size:13px;font-weight:900;letter-spacing:.055em;color:var(--ink)}.footer-brand span{font-size:18px;font-weight:400}
@keyframes arrive{from{opacity:0;transform:rotate(-9deg) translateY(24px)}to{opacity:1;transform:rotate(-5deg) translateY(0)}}
@media(max-width:980px){.hero-inner{grid-template-columns:1fr 1fr;gap:20px}.hero h1{font-size:clamp(42px,5.5vw,58px)}.hero-card{left:-12%;bottom:0}.mode{min-height:235px}.mode-art{width:155px;height:155px}.exercise-head,.exercise-row{grid-template-columns:78px minmax(0,1fr) minmax(0,1fr) 90px}}
@media(max-width:740px){.site-header{height:68px;padding:0 20px}.brand{font-size:17px}.brand img{width:32px;height:32px}.nav-link{display:none}.nav-cta{font-size:12px;padding:9px 11px 9px 14px;gap:8px}.nav-cta span{font-size:18px}.hero{min-height:0}.hero-inner{grid-template-columns:1fr;padding:55px 24px 90px;gap:38px}.hero h1{font-size:clamp(42px,10.3vw,66px);margin-bottom:18px}.hero-lead{font-size:15px;line-height:1.85;margin-bottom:22px}.eyebrow{margin-bottom:23px}.hero-actions{gap:16px}.hero-art{width:min(100%,470px);justify-self:center;aspect-ratio:1 / .9}.hero-cover{width:84%;transform:rotate(-4deg)}.hero-card{left:0;bottom:-2%;width:168px;min-height:127px;padding:13px}.hero-card strong{font-size:16px;margin-top:12px}.hero-card-arrow{font-size:19px}.scroll-cue{display:none}.practice-section{padding:80px 16px 90px}.section-heading{margin-bottom:30px;padding:0 8px}.section-heading>p:last-child{font-size:14px}.exercise{border-radius:20px;padding:20px 14px 22px}.exercise h3{font-size:25px}.exercise-hint{font-size:12px;line-height:1.6}.exercise-head{display:none}.exercise-row{grid-template-columns:62px minmax(0,1fr) minmax(0,1fr);gap:6px;padding:9px;min-height:85px}.period{font-size:12px}.exercise-row label{position:relative}.exercise-row label::before{content:'人数';position:absolute;top:-16px;left:0;font-size:11px;color:var(--muted)}.exercise-row label:nth-of-type(2)::before{content:'単価'}.exercise-row input{height:40px;font-size:14px;padding:0 7px}.subtotal{grid-column:2/4;text-align:right;font-size:11px;margin-top:-2px}.exercise-row:first-of-type{margin-top:12px}.exercise-bottom{align-items:stretch;flex-direction:column}.total{padding:13px 15px;border-radius:10px;background:#e3ebff;justify-content:space-between}.total output{font-size:23px}.button-dark{width:100%;justify-content:center}.mode-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.modes-section{padding:82px 18px 100px}.modes-intro{padding:0 6px;margin-bottom:27px}.mode{min-height:195px;border-radius:17px;padding:16px}.mode-art{width:130px;height:130px;top:8px}.mode-title{font-size:17px}.mode-arrow{font-size:20px}.closing-inner{grid-template-columns:1fr;min-height:0;padding:75px 24px 0}.closing-star{right:35px;left:auto;top:65px;font-size:40px}.closing h2{font-size:44px}.closing-image{width:67%;margin-top:48px;margin-bottom:-80px;justify-self:end}.closing{padding-bottom:80px}footer{padding:25px 24px;flex-direction:column;align-items:flex-start;gap:10px}}
@media(max-width:390px){.hero h1{font-size:39px}.hero-note{font-size:11px}.hero-card{width:155px}.mode{min-height:180px}.mode-art{width:115px;height:115px}.mode-title{font-size:16px}.exercise-row{grid-template-columns:54px minmax(0,1fr) minmax(0,1fr)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.hero-cover{animation:none}.mode,.mode-art,.button,.nav-cta{transition:none}}