:root{
  --ink:#11131a;
  --muted:#656a78;
  --paper:#fffaf2;
  --white:#fff;
  --blue:#2367ff;
  --cyan:#18d8ff;
  --coral:#ff4f8b;
  --lime:#c7ff3d;
  --violet:#7b4dff;
  --line:rgba(17,19,26,.12);
  --shadow:0 26px 80px rgba(28,34,60,.18);
  --radius:28px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font-family:"Noto Sans JP",system-ui,sans-serif;background:linear-gradient(180deg,#fffaf2 0%,#f6f9ff 46%,#fff 100%);overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;justify-content:space-between;padding:16px clamp(18px,4vw,56px);background:rgba(255,250,242,.78);backdrop-filter:blur(18px);border-bottom:1px solid rgba(17,19,26,.08)}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.04em;white-space:nowrap}.brand__mark{display:grid;place-items:center;width:38px;height:38px;border-radius:13px;color:white;background:linear-gradient(135deg,var(--blue),var(--coral));box-shadow:0 12px 30px rgba(35,103,255,.25)}.brand__name{font-size:1.05rem}.brand__name span{display:block;font-size:.72rem;color:var(--muted);letter-spacing:.02em}.site-nav{display:flex;align-items:center;gap:24px;font-weight:800;font-size:.92rem}.site-nav a{white-space:nowrap}.header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:999px;font-weight:900;white-space:nowrap;transition:.22s ease}.header-cta{padding:12px 18px;background:var(--ink);color:white;box-shadow:0 16px 30px rgba(17,19,26,.18)}.btn{padding:15px 22px}.btn--primary{background:linear-gradient(135deg,var(--blue),var(--coral));color:#fff;box-shadow:0 18px 40px rgba(255,79,139,.28)}.btn--ghost{border:1px solid rgba(17,19,26,.16);background:rgba(255,255,255,.68)}.btn--large{padding:18px 28px;font-size:1.06rem}.btn:hover,.header-cta:hover{transform:translateY(-2px)}.nav-toggle{display:none;border:0;background:transparent;width:42px;height:42px}.nav-toggle span{display:block;height:2px;background:var(--ink);margin:7px 4px;border-radius:99px}
.hero{position:relative;min-height:calc(100svh - 72px);padding:70px clamp(18px,5vw,70px) 48px;isolation:isolate}.hero:before{content:"";position:absolute;inset:-140px -20% auto auto;width:760px;height:760px;background:radial-gradient(circle,rgba(35,103,255,.26),transparent 60%);z-index:-2}.hero:after{content:"";position:absolute;left:-18%;top:16%;width:620px;height:620px;background:radial-gradient(circle,rgba(255,79,139,.22),transparent 62%);z-index:-2}.hero__noise{position:absolute;inset:0;background-image:linear-gradient(rgba(17,19,26,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(17,19,26,.035) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(180deg,#000,transparent 86%);z-index:-1}.hero__inner{max-width:1200px;margin:auto;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,.92fr);align-items:center;gap:46px}.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:9px;margin:0 0 18px;padding:8px 13px;border:1px solid rgba(35,103,255,.18);border-radius:999px;background:rgba(255,255,255,.72);color:#1d55d8;font-weight:900;font-size:.88rem}.hero h1{margin:0;font-family:"Zen Kaku Gothic New","Noto Sans JP",sans-serif;font-size:clamp(3rem,6.3vw,5.8rem);line-height:.96;letter-spacing:-.07em}.hero h1 span{display:block;word-break:keep-all;overflow-wrap:normal}.hero h1 strong{display:block;margin-top:.14em;background:linear-gradient(100deg,var(--ink),#263dff 48%,#ff377d 80%);-webkit-background-clip:text;background-clip:text;color:transparent}.lead{max-width:620px;margin:28px 0 0;color:#353948;font-weight:700;line-height:2;font-size:clamp(1rem,1.5vw,1.16rem)}.lead span{display:inline-block;margin-right:.15em}.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin:34px 0 0}.trust-list{display:flex;gap:16px;flex-wrap:wrap;list-style:none;padding:0;margin:22px 0 0;color:#3d4353;font-weight:800;font-size:.9rem}.trust-list i{color:var(--blue)}.hero__visual{position:relative;border-radius:44px;padding:12px;background:linear-gradient(135deg,rgba(255,255,255,.9),rgba(255,255,255,.46));box-shadow:var(--shadow);transform:rotate(1.2deg)}.hero__visual img{aspect-ratio:16/11;object-fit:cover;border-radius:36px}.score-card{position:absolute;display:flex;align-items:center;gap:10px;padding:14px 16px;border:1px solid rgba(255,255,255,.7);border-radius:22px;background:rgba(17,19,26,.82);backdrop-filter:blur(14px);color:white;box-shadow:0 18px 46px rgba(17,19,26,.25)}.score-card--top{top:28px;left:-28px;flex-direction:column;align-items:flex-start;gap:2px}.score-card--top strong{font-size:2.1rem;line-height:1;color:var(--lime)}.score-card--top small{color:rgba(255,255,255,.72);font-weight:700}.score-card--bottom{right:-20px;bottom:28px;font-weight:900}.score-card--bottom i{color:var(--cyan);font-size:1.3rem}.ticker{overflow:hidden;border-block:1px solid rgba(17,19,26,.1);background:var(--ink);color:white}.ticker__track{display:flex;gap:36px;width:max-content;padding:18px 0;animation:ticker 22s linear infinite}.ticker__track span{font-family:Inter,sans-serif;font-size:clamp(1.4rem,4vw,3.4rem);font-weight:900;letter-spacing:-.06em;color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.6)}@keyframes ticker{to{transform:translateX(-50%)}}
.section{max-width:1200px;margin:0 auto;padding:96px clamp(18px,4vw,32px)}.section__head{max-width:760px;margin-bottom:36px}.section h2,.split h2,.price h2,.final-cta h2{margin:0;font-family:"Zen Kaku Gothic New","Noto Sans JP",sans-serif;font-size:clamp(2.2rem,5vw,4.6rem);line-height:1.05;letter-spacing:-.06em}.section__head p:not(.section-kicker),.price__inner>p{color:var(--muted);font-weight:700;line-height:1.9;font-size:1.05rem}.idea-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.idea-card{overflow:hidden;display:flex;flex-direction:column;min-height:520px;border:1px solid rgba(17,19,26,.1);border-radius:var(--radius);background:white;box-shadow:0 18px 50px rgba(32,48,88,.08)}.idea-card img{height:270px;width:100%;object-fit:cover}.idea-card div{padding:26px}.idea-card i{display:grid;place-items:center;width:44px;height:44px;border-radius:15px;background:#eef4ff;color:var(--blue);font-size:1.15rem}.idea-card h3{margin:18px 0 10px;font-size:1.35rem}.idea-card p{margin:0;color:var(--muted);font-weight:700;line-height:1.85}.idea-card--dark{background:var(--ink);color:white;transform:translateY(34px)}.idea-card--dark p{color:rgba(255,255,255,.72)}.idea-card--dark i{background:rgba(255,255,255,.12);color:var(--lime)}
.split{display:grid;grid-template-columns:.95fr 1fr;gap:54px;align-items:center}.split__visual{border-radius:44px;overflow:hidden;box-shadow:var(--shadow);background:#fff;transform:rotate(-1.2deg)}.split__visual img{aspect-ratio:4/5;object-fit:cover}.steps{list-style:none;padding:0;margin:28px 0 0;display:grid;gap:16px}.steps li{display:grid;grid-template-columns:66px 1fr;gap:18px;padding:22px;border:1px solid rgba(17,19,26,.1);border-radius:24px;background:rgba(255,255,255,.72)}.steps span{display:grid;place-items:center;width:54px;height:54px;border-radius:18px;background:linear-gradient(135deg,var(--blue),var(--cyan));color:white;font-family:Inter,sans-serif;font-weight:900}.steps h3{margin:0 0 6px;font-size:1.18rem}.steps p{margin:0;color:var(--muted);font-weight:700;line-height:1.75}.price{max-width:none;background:linear-gradient(135deg,#11131a,#1b2450 55%,#472245);color:white}.price__inner{max-width:950px;margin:auto;text-align:center}.price .section-kicker{background:rgba(255,255,255,.1);color:var(--lime);border-color:rgba(255,255,255,.16)}.price__inner>p{color:rgba(255,255,255,.72);max-width:720px;margin:20px auto 32px}.price-card{display:grid;grid-template-columns:1fr auto auto;gap:28px;align-items:center;text-align:left;padding:26px;border-radius:30px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(16px)}.price-card span{display:block;font-weight:900;color:var(--lime)}.price-card strong{font-family:Inter,sans-serif;font-size:4rem;line-height:1}.price-card small{display:block;color:rgba(255,255,255,.64);font-weight:700}.price-card ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;color:rgba(255,255,255,.82);font-weight:800}.price-card i{color:var(--lime)}.final-cta{max-width:1050px;margin:96px auto;padding:72px clamp(22px,6vw,80px);border-radius:42px;text-align:center;color:white;background:linear-gradient(135deg,rgba(35,103,255,.94),rgba(255,79,139,.92)),url('/images/highschool/hero.webp') center/cover;box-shadow:var(--shadow);position:relative;overflow:hidden}.final-cta:before{content:"";position:absolute;inset:0;background:rgba(17,19,26,.22)}.final-cta>*{position:relative}.final-cta p{font-weight:900;color:var(--lime);margin:0 0 12px}.final-cta h2{margin-bottom:28px}.site-footer{padding:46px clamp(18px,4vw,56px);background:var(--ink);color:white}.footer-brand{font-weight:900;font-size:1.2rem}.footer-links{display:flex;gap:18px;flex-wrap:wrap;margin:18px 0;color:rgba(255,255,255,.74);font-weight:700}.site-footer p{margin:0;color:rgba(255,255,255,.55)}.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}.reveal.is-visible{opacity:1;transform:none}
@media (max-width:980px){.site-nav,.header-cta{display:none}.nav-toggle{display:block}.site-nav.is-open{position:absolute;display:grid;left:18px;right:18px;top:72px;padding:18px;border-radius:24px;background:#fff;box-shadow:var(--shadow)}.hero{padding-top:44px}.hero__inner,.split{grid-template-columns:1fr}.hero__visual{transform:none}.idea-grid{grid-template-columns:1fr}.idea-card,.idea-card--dark{min-height:auto;transform:none}.idea-card img{height:280px}.price-card{grid-template-columns:1fr;text-align:center}.price-card ul{justify-items:center}.ticker__track{animation-duration:16s}}
@media (max-width:640px){.site-header{padding:12px 16px}.brand__mark{width:34px;height:34px}.brand__name{font-size:.94rem}.hero{min-height:auto;padding:34px 18px 34px}.hero__inner{gap:30px}.hero h1{font-size:clamp(2.25rem,11.5vw,3.15rem);line-height:1.04;letter-spacing:-.06em}.hero h1 strong{margin-top:.18em}.lead{font-size:.95rem;line-height:1.8;margin-top:22px}.lead span{display:inline-block}.hero__actions{display:grid;margin-top:26px}.btn{width:100%;padding:15px 18px}.trust-list{display:grid;gap:10px}.score-card--top{left:10px;top:10px}.score-card--bottom{right:10px;bottom:10px}.section{padding:70px 18px}.section h2,.split h2,.price h2,.final-cta h2{font-size:clamp(2rem,11vw,3.3rem)}.idea-card img{height:230px}.steps li{grid-template-columns:1fr}.final-cta{margin:70px 18px;padding:54px 22px}.footer-links{display:grid}}