:root{
  --bg:#fff8f8;
  --bg-soft:#fff3f3;
  --panel:#ffffff;
  --text:#1f2430;
  --muted:#697586;
  --line:#ffdede;
  --red:#ff2d2d;
  --red-dark:#e71d1d;
  --pink:#ff7b9c;
  --yellow:#ffd44d;
  --green:#06c755;
  --shadow:0 24px 60px rgba(255,45,45,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"M PLUS Rounded 1c",-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;
  color:var(--text);
  background:#fff;
  line-height:1.7;
}
a{text-decoration:none;color:inherit}
.container{width:min(1120px,calc(100% - 32px));margin:auto}
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid #ffe1e1;
}
.header-inner{
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{font-size:22px;font-weight:900;letter-spacing:-.04em}
.brand span{color:var(--red)}
.btn{
  border:0;border-radius:18px;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:900;cursor:pointer;transition:.2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-small{padding:11px 16px;font-size:14px}
.btn-large{padding:17px 26px;font-size:16px;min-width:250px}
.btn-line{
  background:var(--green);color:#fff;
  box-shadow:0 14px 26px rgba(6,199,85,.20);
}
.btn-red{
  background:linear-gradient(135deg,var(--red),var(--pink));
  color:#fff;box-shadow:0 18px 30px rgba(255,45,45,.22);
}
.btn-white{
  background:#fff;color:var(--red-dark);
  box-shadow:0 14px 30px rgba(0,0,0,.10);
}

.hero{
  padding:74px 0 62px;
  background:
    radial-gradient(circle at 10% 15%, rgba(255,212,77,.22), transparent 18%),
    radial-gradient(circle at 90% 20%, rgba(255,123,156,.20), transparent 18%),
    linear-gradient(180deg,#fff 0%, #fff7f7 100%);
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;
  background:#ffe8e8;color:var(--red-dark);
  border-radius:999px;padding:8px 13px;
  font-size:12px;font-weight:900;letter-spacing:.04em;
}
.eyebrow.white{background:rgba(255,255,255,.16);color:#fff}
.hero h1{
  margin:18px 0 16px;
  font-size:clamp(42px,6.2vw,74px);
  line-height:1.06;
  letter-spacing:-.05em;
}
.hero h1 span{
  color:var(--red);
  text-shadow:0 6px 18px rgba(255,45,45,.10);
}
.hero-text{
  font-size:18px;color:var(--muted);line-height:1.9;max-width:690px;
}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 20px}
.point{
  display:flex;align-items:center;gap:8px;
  padding:10px 14px;border-radius:999px;
  background:#fff;border:2px solid #ffe3e3;
  font-size:13px;font-weight:800;
}
.point b{color:var(--red);font-size:12px}
.fineprint{font-size:12px;color:#7d8794;line-height:1.75;margin-top:14px}

.hero-visual{display:flex;justify-content:center}
.visual-card{
  position:relative;width:min(100%,480px);
}
.video-panel{
  background:#fff;border:2px solid #ffe1e1;border-radius:34px;
  padding:18px;box-shadow:var(--shadow);
}
.video-thumb{
  height:220px;border-radius:24px;
  background:linear-gradient(135deg,#ff4040,#ff7b9c);
  display:grid;place-items:center;
  position:relative;overflow:hidden;
}
.video-thumb:before{
  content:"";position:absolute;inset:18px;
  border-radius:18px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.24);
}
.play-circle{
  position:relative;z-index:1;
  width:82px;height:82px;border-radius:50%;
  background:#fff;color:var(--red);
  display:grid;place-items:center;font-size:28px;font-weight:900;
  box-shadow:0 12px 30px rgba(0,0,0,.12);
}
.reward-box{
  margin-top:14px;
  background:#fff6d8;border:2px solid #ffe38b;border-radius:22px;padding:18px;
}
.reward-box>span{font-size:13px;color:#6f6b55;font-weight:700}
.reward-box div{display:flex;align-items:flex-end;gap:5px;margin-top:5px}
.reward-box small{font-weight:900;color:#c77c00;margin-bottom:6px}
.reward-box strong{font-size:48px;line-height:1;letter-spacing:-.05em}
.reward-box em{font-style:normal;font-weight:900;margin-bottom:6px}
.task-card{
  margin-top:12px;background:#fff;border:2px solid #ffe8e8;border-radius:20px;
  padding:14px 15px;display:flex;align-items:center;gap:12px;
}
.task-icon{
  width:44px;height:44px;border-radius:15px;
  background:#ffe8e8;color:var(--red);
  display:grid;place-items:center;font-weight:900;flex:0 0 44px;
}
.task-card strong{display:block}
.task-card span{display:block;font-size:12px;color:var(--muted)}

.floating-badge{
  position:absolute;z-index:3;
  background:#fff;color:var(--red);
  border:2px solid #ffd4d4;
  padding:9px 12px;border-radius:999px;
  font-size:12px;font-weight:900;box-shadow:0 12px 30px rgba(255,45,45,.10);
}
.badge-top{top:-12px;left:-8px}
.badge-right{right:-8px;top:40px}

.section{padding:78px 0}
.muted-section{background:var(--bg)}
.section-head{text-align:center;max-width:760px;margin:0 auto 40px}
.section-head h2{
  margin:14px 0 12px;
  font-size:clamp(31px,4.2vw,46px);
  line-height:1.15;letter-spacing:-.04em;
}
.section-head p{margin:0;color:var(--muted);line-height:1.85}
.cards.three{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  background:#fff;border:2px solid #ffe6e6;border-radius:26px;
  padding:24px;box-shadow:0 10px 32px rgba(255,45,45,.05);
}
.card-icon{
  width:52px;height:52px;border-radius:16px;
  background:#ffe8e8;color:var(--red);
  display:grid;place-items:center;font-size:22px;font-weight:900;
  margin-bottom:18px;
}
.card h3{margin:0 0 8px;font-size:20px}
.card p{margin:0;color:var(--muted)}

.steps{max-width:840px;margin:auto;display:grid;gap:14px}
.step{
  display:grid;grid-template-columns:auto 1fr;gap:18px;
  background:#fff;border:2px solid #ffe3e3;border-radius:22px;
  padding:20px 22px;align-items:flex-start;
}
.step-no{
  width:44px;height:44px;border-radius:50%;
  background:linear-gradient(135deg,var(--red),var(--pink));
  color:#fff;display:grid;place-items:center;font-weight:900;
}
.step h3{margin:3px 0 5px}
.step p{margin:0;color:var(--muted)}
.center-cta{text-align:center;margin-top:28px}

.reward-section{
  background:linear-gradient(135deg,var(--red-dark),var(--red),var(--pink));
  color:#fff;
}
.reward-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.reward-main h2{
  font-size:clamp(36px,5vw,58px);
  line-height:1.1;letter-spacing:-.04em;margin:14px 0 0;
}
.reward-main h2 span{color:#fff8c4}
.reward-side p{color:#ffe8e8;font-size:16px;line-height:1.9}
.fineprint.white{color:#fff1f1}

.faq{max-width:860px;margin:auto;display:grid;gap:12px}
details{
  background:#fff;border:2px solid #ffe2e2;border-radius:18px;padding:18px 20px;
}
summary{font-weight:900;cursor:pointer}
details p{color:var(--muted);margin:12px 0 0}

.final-cta{padding:74px 0 100px;background:linear-gradient(180deg,#fff7f7,#fff)}
.final-box{
  background:linear-gradient(135deg,#ff4040,#ff2d2d,#ff7b9c);
  color:#fff;text-align:center;border-radius:34px;
  padding:46px 24px;box-shadow:0 28px 70px rgba(255,45,45,.18);
}
.final-box h2{
  margin:14px 0 12px;
  font-size:clamp(34px,5vw,50px);
  line-height:1.12;letter-spacing:-.04em;
}
.final-box p{margin:0 0 22px;color:#fff0f0}
.footer{
  text-align:center;padding:30px 0 100px;color:#7b8692;background:#fff;
}
.footer .brand{margin-bottom:8px}
.footer p{margin:4px 0}
.mobile-fixed{display:none}

@media(max-width:900px){
  .hero-grid,.reward-wrap{grid-template-columns:1fr}
  .hero-copy{text-align:center}
  .hero-text{margin-left:auto;margin-right:auto}
  .hero-points{justify-content:center}
  .cards.three{grid-template-columns:1fr}
  .hero-visual{margin-top:10px}
}
@media(max-width:640px){
  .container{width:min(100% - 24px,1120px)}
  .header-inner{height:64px}
  .header .btn-small{display:none}
  .hero{padding:46px 0 36px}
  .hero h1{font-size:42px}
  .hero-text{font-size:15px}
  .hero-points{display:grid;grid-template-columns:1fr;max-width:330px;margin:22px auto}
  .point{justify-content:flex-start}
  .btn-large{width:100%;min-width:0}
  .video-panel{padding:14px;border-radius:24px}
  .video-thumb{height:190px;border-radius:18px}
  .reward-box strong{font-size:40px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .step{padding:18px}
  .floating-badge{display:none}
  .final-cta{padding:54px 0 90px}
  .final-box{padding:34px 18px;border-radius:24px}
  .mobile-fixed{
    display:block;position:fixed;z-index:40;
    left:0;right:0;bottom:0;padding:9px 12px;
    background:rgba(255,255,255,.96);border-top:1px solid #ffe3e3;
    backdrop-filter:blur(12px);
  }
  .footer{padding-bottom:110px}
}