@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700;800;900&display=swap');
:root{--ink:#242b3b;--muted:#657086;--blue:#4568e8;--blue-dark:#2e49b8;--pale:#f3f6ff;--yellow:#ffd968;--pink:#ffe9e4;--line:#e6eaf3}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;font-family:"Noto Sans JP",system-ui,sans-serif;color:var(--ink);line-height:1.8;background:#fff}
a{color:inherit;text-decoration:none}
.site-header{height:78px;padding:0 max(5vw,24px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #edf0f6;background:rgba(255,255,255,.94);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:19px;line-height:1.15;white-space:nowrap}
.brand small{display:block;font-size:10px;letter-spacing:.12em;font-weight:600;margin-top:5px}
.brand-mark{width:42px;height:42px;border-radius:15px;background:var(--yellow);display:grid;place-items:center;font-size:13px;transform:rotate(-5deg);box-shadow:4px 4px 0 #f3bd49}
.nav{display:flex;align-items:center;gap:28px;font-size:13px;font-weight:700}
.nav a:not(.nav-cta):hover,.text-link:hover{color:var(--blue)}
.nav-cta{background:var(--blue);color:#fff;padding:10px 18px;border-radius:999px}
.menu-toggle{display:none;border:0;background:var(--pale);padding:9px 12px;border-radius:9px;font:inherit;font-size:13px}
.hero{min-height:590px;padding:78px max(7vw,28px) 72px;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:40px;overflow:hidden;background:linear-gradient(120deg,#f5f7ff 0%,#fff 60%,#fff9e9 100%)}
.eyebrow{font-size:11px;letter-spacing:.16em;font-weight:900;color:var(--blue);margin:0 0 14px}
.hero h1{font-size:clamp(36px,4.3vw,62px);line-height:1.38;letter-spacing:-.04em;margin:0;font-weight:900}
.hero h1 span{color:var(--blue)}
.hero-lead{font-size:16px;color:var(--muted);max-width:520px;margin:22px 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;border-radius:999px;font-weight:800;font-size:13px;transition:transform .2s,box-shadow .2s}
.button:hover{transform:translateY(-2px)}
.button-primary{background:var(--blue);color:white;box-shadow:0 8px 18px #4568e82c}
.button-ghost{border:1px solid #dce2f2;background:white}
.grade-pills{display:flex;gap:8px;flex-wrap:wrap;margin-top:28px}
.grade-pills span{font-size:11px;font-weight:700;padding:5px 12px;background:white;border:1px solid var(--line);border-radius:999px}
.hero-art{height:380px;position:relative;display:grid;place-items:center}
.orbit{position:absolute;border:1px solid #dce3ff;border-radius:50%;width:310px;height:310px;transform:rotate(-22deg)}
.orbit-two{width:390px;height:230px;border-color:#f6df9b;transform:rotate(35deg)}
.book{width:190px;height:210px;background:var(--yellow);border:4px solid var(--ink);border-radius:24px 35px 28px 18px;box-shadow:14px 14px 0 #d7e0ff;display:grid;place-content:center;text-align:center;font-size:26px;font-weight:800;line-height:1.45;transform:rotate(7deg);position:relative;z-index:2}
.book b{font-size:52px;color:var(--blue)}
.bubble{position:absolute;background:white;border:2px solid var(--ink);border-radius:18px;padding:10px 16px;font-weight:900;box-shadow:4px 5px 0 var(--ink);z-index:3}
.bubble-top{top:35px;right:12px;transform:rotate(7deg);color:var(--blue)}
.bubble-bottom{bottom:34px;left:10px;transform:rotate(-7deg)}
.spark{position:absolute;font-size:38px;color:var(--blue)}
.spark-a{top:68px;left:24px}.spark-b{bottom:42px;right:36px;color:#ef9e65}
.section{padding:90px max(7vw,28px)}
.intro{text-align:center}
.section h2{font-size:clamp(27px,3vw,40px);line-height:1.45;letter-spacing:-.03em;margin:0;font-weight:900}
.section-lead{color:var(--muted);font-size:14px;max-width:650px;margin:14px auto 38px}
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;text-align:left;max-width:1080px;margin:auto}
.pain-card{padding:28px 26px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:0 8px 30px #283b6a08}
.card-icon{width:44px;height:44px;border-radius:15px;background:var(--pale);display:grid;place-items:center;color:var(--blue);font-size:25px;font-weight:900}
.pain-card h3{font-size:17px;margin:18px 0 8px}.pain-card p{font-size:13px;color:var(--muted);margin:0}
.method{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:70px;background:#f7f8fc}
.method-copy p:not(.eyebrow){color:var(--muted);font-size:14px}
.text-link{display:inline-block;margin-top:12px;color:var(--blue);font-weight:800;font-size:14px}
.method-visual{display:grid;gap:14px;max-width:470px;width:100%;margin:auto}
.note{padding:19px 22px;background:white;border:1px solid var(--line);border-radius:18px;display:grid;grid-template-columns:48px 1fr;align-items:center;box-shadow:0 10px 25px #1c2b5508}
.note span{grid-row:span 2;color:var(--blue);font-size:22px;font-weight:900}
.note b{font-size:15px}.note small{font-size:12px;color:var(--muted)}
.note-two{transform:translateX(24px)}.note-three{transform:translateX(48px)}
.lessons{text-align:center}
.subject-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:950px;margin:auto;text-align:left}
.subject-card{padding:34px;border-radius:24px;min-height:230px}
.science{background:#eef2ff}.social{background:#fff4df}
.subject-label{font-size:10px;letter-spacing:.15em;font-weight:900;color:var(--blue)}
.subject-card h3{font-size:28px;margin:8px 0}.subject-card p{font-size:13px;color:var(--muted);max-width:400px}
.teacher{display:grid;grid-template-columns:180px 1fr;gap:45px;align-items:center;background:#fff9ec}
.teacher-badge{width:150px;height:150px;border-radius:50%;display:grid;place-items:center;background:var(--yellow);font-weight:900;font-size:21px;transform:rotate(-8deg);border:3px solid var(--ink)}
.teacher p:not(.eyebrow){color:var(--muted);font-size:14px;max-width:760px}
.social-banner{margin:0 max(7vw,28px) 40px;padding:44px 48px;border-radius:28px;background:var(--blue);color:white;display:flex;justify-content:space-between;align-items:center;gap:30px}
.social-banner .eyebrow{color:#ffe18a}.social-banner h2{font-size:30px;line-height:1.4;margin:0}.social-banner p:not(.eyebrow){font-size:13px;color:#e0e6ff;margin-bottom:0}
.button-light{background:white;color:var(--blue);white-space:nowrap}
.contact{text-align:center}.contact .section-lead{margin-bottom:25px}.fine-print{font-size:11px;color:#9299a8;margin-top:20px}
.site-footer{border-top:1px solid var(--line);padding:30px max(5vw,24px);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:11px;color:var(--muted)}
.brand-footer{color:var(--ink);font-size:15px}.brand-footer .brand-mark{width:34px;height:34px;font-size:10px}.brand-footer small{font-size:9px}
@media(max-width:800px){
 .site-header{height:68px;padding:0 20px}.brand{font-size:17px}.brand-mark{width:36px;height:36px}
 .menu-toggle{display:block}.nav{display:none;position:absolute;top:67px;left:0;right:0;background:white;padding:16px 20px 22px;border-bottom:1px solid var(--line);box-shadow:0 12px 20px #18244b10;flex-direction:column;align-items:stretch;gap:0}
 .nav.is-open{display:flex}.nav a{padding:13px 8px}.nav .nav-cta{text-align:center;margin-top:8px;padding:11px}
 .hero{grid-template-columns:1fr;padding:55px 24px 35px;gap:14px;text-align:center}.hero h1{font-size:clamp(34px,8.8vw,48px)}.hero-lead{font-size:14px;margin:18px auto 24px}.hero-actions{justify-content:center}.button{min-height:46px;padding:11px 17px;font-size:12px}.grade-pills{justify-content:center;margin-top:23px}
 .hero-art{height:285px;margin-top:0}.orbit{width:240px;height:240px}.orbit-two{width:300px;height:180px}.book{width:145px;height:160px;font-size:20px;border-width:3px;box-shadow:10px 10px 0 #d7e0ff}.book b{font-size:42px}.bubble{font-size:12px;padding:7px 11px}.bubble-top{top:17px;right:3%}.bubble-bottom{bottom:16px;left:3%}.spark{font-size:28px}
 .section{padding:65px 22px}.section-lead{font-size:13px;margin-bottom:28px}.pain-grid{grid-template-columns:1fr;gap:12px}.pain-card{padding:22px}.pain-card h3{font-size:16px;margin:12px 0 5px}
 .method{grid-template-columns:1fr;gap:28px}.method-visual{max-width:390px}.note{padding:16px 18px}.note-two{transform:translateX(10px)}.note-three{transform:translateX(20px)}
 .subject-grid{grid-template-columns:1fr;gap:12px}.subject-card{padding:27px;min-height:0}.subject-card h3{font-size:25px}
 .teacher{grid-template-columns:1fr;gap:25px;text-align:center}.teacher-badge{width:105px;height:105px;font-size:16px;margin:auto}.teacher p:not(.eyebrow){font-size:13px}
 .social-banner{margin:0 16px 25px;padding:30px 23px;border-radius:22px;display:block;text-align:center}.social-banner h2{font-size:25px}.social-banner p:not(.eyebrow){margin:10px 0 22px}.button-light{width:100%}
 .site-footer{padding:25px 22px;flex-direction:column;text-align:center;gap:10px}.site-footer p{margin:0}
}
@media(min-width:801px) and (max-width:1050px){.nav{gap:14px}.hero{padding-left:5vw;padding-right:5vw}.hero h1{font-size:48px}.section{padding-left:5vw;padding-right:5vw}}