:root {
  --ink: #11151c;
  --night: #061b23;
  --navy: #102f50;
  --blue: #9ed8f0;
  --pale: #eef8fb;
  --paper: #fffaf0;
  --white: #ffffff;
  --gold: #d9b25f;
  --orange: #f05b2f;
  --green: #06c755;
  --green-dark: #049f44;
  --muted: #66717a;
  --line: rgba(17, 21, 28, 0.14);
  --shadow: 0 24px 64px rgba(17, 21, 28, 0.18);
  --radius: 8px;
  --max: 1100px;
  color: var(--ink);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
  background: #dfe8ec;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 4%, rgba(158, 216, 240, 0.38), transparent 28%),
    linear-gradient(90deg, #cbd8de 0, #f6f6f1 16%, #f6f6f1 84%, #cbd8de 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(17, 21, 28, 0.04) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(0deg, rgba(17, 21, 28, 0.035) 1px, transparent 1px) 0 0 / 44px 44px;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: fixed;
  left: 14px;
  top: 12px;
  z-index: 30;
  transform: translateY(-150%);
  padding: 10px 12px;
  color: var(--white);
  background: var(--ink);
  border-radius: var(--radius);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.lp-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: min(100%, var(--max));
  min-height: 66px;
  margin: 0 auto;
  padding: 10px clamp(14px, 3vw, 28px);
  background: rgba(255, 255, 255, 0.9);
  border-inline: 1px solid rgba(255, 255, 255, 0.68);
  box-shadow: 0 10px 36px rgba(17, 21, 28, 0.1);
  backdrop-filter: blur(16px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: var(--white);
  background: linear-gradient(135deg, var(--navy), #1880a7);
  font-weight: 900;
}

.logo-copy {
  display: grid;
  gap: 2px;
  line-height: 1.2;
}

.logo-copy strong {
  font-size: 14px;
}

.logo-copy small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.header-line {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 9px 14px;
  color: var(--white);
  background: var(--green);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
  text-decoration: none;
  box-shadow: 0 8px 18px rgba(6, 199, 85, 0.28);
}

.hero,
.section-narrow,
.promise,
.cta-strip,
.curriculum,
.proof,
.final-cta,
.lp-footer {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 860px;
  color: var(--white);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent 22%),
    linear-gradient(138deg, rgba(16, 47, 80, 0.98), rgba(6, 27, 35, 0.96) 54%, rgba(12, 58, 66, 0.96));
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -80px -120px -80px;
  height: 310px;
  background: var(--paper);
  border-radius: 50% 50% 0 0 / 34% 34% 0 0;
  transform: rotate(-3deg);
}

.hero-band {
  position: relative;
  z-index: 2;
  padding: 16px 18px;
  color: #efe7d0;
  background: rgba(17, 21, 28, 0.36);
  text-align: center;
  font-size: clamp(18px, 3.9vw, 34px);
  font-weight: 900;
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: clamp(34px, 7vw, 80px) clamp(20px, 7vw, 74px) 270px;
}

.partner-badge,
.campaign,
.section-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin: 0 0 16px;
  padding: 5px 12px;
  color: var(--white);
  background: var(--orange);
  border-radius: 999px;
  font-size: 12px;
  line-height: 1.4;
  font-weight: 900;
}

.section-kicker {
  color: var(--orange);
  background: rgba(240, 91, 47, 0.1);
}

h1,
h2,
h3,
p,
li {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 860px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(48px, 11vw, 118px);
  line-height: 1.05;
  font-weight: 500;
  letter-spacing: 0;
}

h1 span {
  color: #ffe7a8;
  text-shadow: 0 4px 0 rgba(17, 21, 28, 0.3);
}

.hero-lead {
  max-width: 720px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(18px, 3.3vw, 28px);
  line-height: 1.8;
  font-weight: 800;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 760px;
  margin: 34px 0 0;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.32);
  list-style: none;
}

.hero-points li {
  display: grid;
  place-items: center;
  min-height: 92px;
  padding: 12px;
  border-right: 1px dashed rgba(255, 255, 255, 0.36);
  text-align: center;
  font-size: clamp(16px, 3vw, 24px);
  font-weight: 900;
}

.hero-points li:last-child {
  border-right: 0;
}

.hero-cta {
  max-width: 710px;
  margin-top: 34px;
  padding: clamp(18px, 4vw, 26px);
  background: rgba(0, 0, 0, 0.34);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
}

.hero-cta p {
  margin: 0 0 14px;
  color: #ffe7a8;
  text-align: center;
  font-weight: 900;
}

.line-button {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 72px;
  padding: 13px 18px;
  color: var(--white);
  background: linear-gradient(180deg, #10d967, var(--green-dark));
  border: 3px solid #b7ffd2;
  border-radius: 999px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.34),
    0 16px 30px rgba(6, 199, 85, 0.34);
  text-align: center;
  text-decoration: none;
  transition: transform 160ms ease, filter 160ms ease;
}

.line-button:hover,
.line-button:focus-visible {
  transform: translateY(-2px);
  filter: brightness(1.04);
}

.line-button span {
  font-size: clamp(20px, 4.5vw, 32px);
  line-height: 1.25;
  font-weight: 900;
}

.line-button small {
  margin-top: 4px;
  font-size: 12px;
  font-weight: 800;
}

.hero-visual {
  position: absolute;
  z-index: 3;
  right: clamp(10px, 4vw, 58px);
  bottom: 28px;
  width: min(45%, 420px);
}

.section-narrow {
  padding: clamp(62px, 9vw, 108px) clamp(18px, 5vw, 66px);
  background: var(--paper);
}

.section-narrow h2,
.promise h2,
.cta-box h2,
.proof h2,
.final-cta h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(34px, 7vw, 72px);
  line-height: 1.18;
  font-weight: 500;
}

.problem h2 {
  max-width: 880px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 34px;
}

.problem-grid div {
  min-height: 230px;
  padding: 24px;
  color: var(--white);
  background: linear-gradient(180deg, #2a343f, #121820);
  border-radius: var(--radius);
}

.problem-grid span {
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
}

.problem-grid p {
  margin: 38px 0 0;
  font-size: 18px;
  line-height: 1.8;
  font-weight: 800;
}

.promise {
  padding: clamp(68px, 10vw, 118px) clamp(20px, 7vw, 82px);
  color: var(--white);
  background:
    radial-gradient(circle at 82% 10%, rgba(217, 178, 95, 0.24), transparent 28%),
    linear-gradient(135deg, #081b34, #061b23 72%);
}

.promise-inner {
  max-width: 850px;
}

.promise p,
.proof p,
.final-cta p {
  max-width: 820px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: clamp(16px, 2.6vw, 21px);
  line-height: 1.9;
  font-weight: 700;
}

.promise-inner > p:first-child {
  margin-top: 0;
  color: var(--gold);
  font-weight: 900;
}

.cta-strip {
  padding: clamp(26px, 6vw, 54px) clamp(18px, 5vw, 66px);
  background: var(--night);
}

.cta-box {
  max-width: 820px;
  margin: 0 auto;
  color: var(--white);
  text-align: center;
}

.cta-box h2 {
  margin-bottom: 22px;
  font-size: clamp(28px, 5.5vw, 54px);
}

.benefit-list {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.benefit-list article {
  display: grid;
  grid-template-columns: 130px minmax(0, 0.9fr) minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 8px solid var(--gold);
  border-radius: var(--radius);
  box-shadow: 0 12px 28px rgba(17, 21, 28, 0.08);
}

.benefit-number {
  display: grid;
  place-items: center;
  min-height: 82px;
  color: var(--white);
  background: linear-gradient(180deg, var(--gold), #b98c2d);
  border-radius: var(--radius);
  font-size: 18px;
  font-weight: 900;
}

.benefit-list h3 {
  margin: 0;
  font-size: clamp(22px, 3vw, 32px);
}

.benefit-list p,
.lesson-list p,
.check-list,
.faq p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
  font-weight: 700;
}

.curriculum {
  padding-block: clamp(62px, 9vw, 108px);
  background:
    linear-gradient(180deg, rgba(158, 216, 240, 0.3), transparent 22%),
    #f7fbfd;
}

.curriculum .section-narrow {
  padding-block: 0;
  background: transparent;
}

.lesson-list {
  display: grid;
  gap: 1px;
  margin: 36px 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  list-style: none;
}

.lesson-list li {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  padding: 26px;
  background: var(--white);
}

.lesson-list span {
  color: var(--orange);
  font-size: 20px;
  font-weight: 900;
}

.lesson-list h3 {
  margin: 0 0 8px;
  font-size: clamp(22px, 3.2vw, 34px);
}

.check-list {
  display: grid;
  gap: 14px;
  margin-top: 34px;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 18px 18px 18px 54px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 22px;
  width: 18px;
  height: 18px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: inset 0 0 0 5px var(--white);
}

.proof {
  padding: clamp(68px, 10vw, 118px) clamp(20px, 7vw, 82px);
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(240, 91, 47, 0.14), transparent 48%),
    #1b2430;
}

.proof-inner {
  max-width: 880px;
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 34px;
}

.faq details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq summary {
  cursor: pointer;
  padding: 20px 54px 20px 22px;
  font-size: clamp(18px, 2.8vw, 24px);
  font-weight: 900;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  float: right;
  margin-right: -34px;
  color: var(--orange);
  font-size: 28px;
  line-height: 1;
}

.faq details[open] summary::after {
  content: "-";
}

.faq p {
  padding: 0 22px 22px;
}

.final-cta {
  padding: clamp(70px, 11vw, 132px) clamp(18px, 7vw, 82px);
  color: var(--white);
  background:
    radial-gradient(circle at 80% 20%, rgba(6, 199, 85, 0.2), transparent 30%),
    linear-gradient(145deg, #061b23, #102f50);
  text-align: center;
}

.final-cta div {
  max-width: 820px;
  margin: 0 auto;
}

.final-cta .line-button {
  margin-top: 28px;
}

.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 14px;
  z-index: 25;
  display: flex;
  justify-content: center;
  padding-inline: 14px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.sticky-cta.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.sticky-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: min(100%, 460px);
  min-height: 56px;
  color: var(--white);
  background: var(--green);
  border: 2px solid #b7ffd2;
  border-radius: 999px;
  box-shadow: 0 16px 34px rgba(17, 21, 28, 0.26);
  font-size: 18px;
  font-weight: 900;
  text-decoration: none;
}

.lp-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(18px, 5vw, 44px) 96px;
  color: rgba(255, 255, 255, 0.74);
  background: #050f14;
}

.lp-footer a {
  text-decoration: none;
}

@media (max-width: 820px) {
  .hero {
    min-height: 820px;
  }

  .hero-inner {
    padding-bottom: 230px;
  }

  .hero-points,
  .problem-grid {
    grid-template-columns: 1fr;
  }

  .hero-points li {
    min-height: 68px;
    border-right: 0;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.36);
  }

  .hero-points li:last-child {
    border-bottom: 0;
  }

  .hero-visual {
    width: min(70%, 340px);
  }

  .benefit-list article {
    grid-template-columns: 1fr;
  }

  .benefit-number {
    width: 126px;
    min-height: 58px;
  }

  .lesson-list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 560px) {
  .lp-header {
    min-height: 60px;
  }

  .logo-copy small {
    display: none;
  }

  .header-line {
    padding-inline: 12px;
  }

  .hero {
    min-height: 760px;
  }

  .hero-inner {
    padding-inline: 16px;
    padding-bottom: 205px;
  }

  .hero-visual {
    right: 0;
    bottom: 34px;
    width: 76%;
  }

  .line-button {
    border-width: 2px;
    border-radius: 26px;
  }

  .section-narrow,
  .promise,
  .cta-strip,
  .proof,
  .final-cta {
    padding-inline: 16px;
  }

  .problem-grid div {
    min-height: 190px;
  }

  .benefit-list article,
  .lesson-list li {
    padding: 20px;
  }

  .lp-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}