:root {
  --green: #163d35;
  --green-2: #235548;
  --green-3: #e6eee9;
  --ink: #18211f;
  --muted: #65706b;
  --paper: #fbfaf6;
  --white: #ffffff;
  --orange: #d87555;
  --orange-2: #bf6246;
  --gold: #b99445;
  --line: rgba(24, 33, 31, 0.14);
  --shadow: 0 18px 44px rgba(22, 61, 53, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.8;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 48px);
  color: var(--white);
  background: rgba(22, 61, 53, 0.72);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-symbol {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 50%;
  font-family: Georgia, serif;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  font-weight: 700;
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 800;
  text-align: center;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.header-cta {
  min-height: 48px;
  padding-inline: 26px;
  color: var(--white);
  background: var(--orange);
}

.button:hover,
.header-cta:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--orange), var(--orange-2));
  box-shadow: 0 14px 30px rgba(216, 117, 85, 0.32);
}

.button-outline {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.72);
}

.button-outline.dark {
  color: var(--green);
  border-color: rgba(22, 61, 53, 0.35);
  background: var(--white);
}

.hero {
  position: relative;
  min-height: 100vh;
  padding: 128px clamp(20px, 6vw, 80px) 54px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(22, 61, 53, 0.95) 0%, rgba(22, 61, 53, 0.8) 38%, rgba(22, 61, 53, 0.42) 70%, rgba(22, 61, 53, 0.25) 100%),
    url("images/video-learning-with-ryu-v2.png") center right / cover;
}

.hero-inner {
  max-width: 760px;
}

.hero-kicker,
.section-label {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(56px, 8vw, 104px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 760px;
  margin: 28px 0 0;
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 34px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 620px;
  margin-top: 34px;
}

.hero-stats div {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
}

.hero-stats span {
  display: block;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.hero-stats strong {
  display: block;
  margin-top: 4px;
  font-size: 18px;
}

.section {
  padding: clamp(72px, 10vw, 120px) clamp(20px, 6vw, 80px);
}

.section-heading {
  max-width: 880px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading.light {
  color: var(--white);
}

.section-heading h2,
.intro-panel h2,
.host-copy h2,
.final-inner h2 {
  margin: 0;
  font-size: clamp(30px, 4.6vw, 54px);
  line-height: 1.35;
  letter-spacing: 0;
}

.section-heading p:not(.section-label),
.intro-panel p,
.host-copy p,
.final-inner p {
  color: var(--muted);
  font-size: 17px;
}

.intro {
  background: var(--paper);
}

.intro-panel {
  max-width: 980px;
  margin: 0 auto;
  padding: clamp(34px, 5vw, 58px);
  border-left: 8px solid var(--orange);
  background: var(--white);
  box-shadow: var(--shadow);
}

.worries {
  background: #f1eee5;
}

.worry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 1120px;
  margin: 0 auto;
}

.worry-grid div {
  position: relative;
  padding: 20px 20px 20px 48px;
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 26px rgba(24, 33, 31, 0.08);
}

.worry-grid div::before {
  position: absolute;
  left: 20px;
  color: var(--orange);
  content: "✓";
  font-weight: 900;
}

.center-copy {
  max-width: 850px;
  margin: 34px auto 0;
  color: var(--green);
  font-size: 20px;
  font-weight: 800;
  text-align: center;
}

.benefits,
.reasons,
.recommend {
  background: var(--green);
}

.benefit-grid,
.reason-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  max-width: 1120px;
  margin: 0 auto;
}

.benefit-grid article,
.reason-grid article {
  padding: 30px;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.benefit-grid span {
  color: var(--gold);
  font-size: 34px;
  font-weight: 900;
}

.benefit-grid h3,
.reason-grid h3 {
  margin: 12px 0 10px;
  font-size: 24px;
  line-height: 1.4;
}

.benefit-grid p,
.reason-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
}

.reason-number {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--green);
  border-radius: 50%;
  background: var(--gold);
  font-weight: 900;
}

.details {
  background: var(--paper);
}

.detail-list {
  display: grid;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
}

.detail-list article {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  overflow: hidden;
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.detail-list article:nth-child(even) .detail-image {
  order: 2;
}

.detail-image img {
  height: 100%;
  min-height: 300px;
  object-fit: cover;
}

.detail-copy {
  padding: clamp(28px, 5vw, 52px);
}

.detail-copy span {
  color: var(--orange);
  font-size: 32px;
  font-weight: 900;
}

.detail-copy h3 {
  margin: 8px 0 16px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.35;
}

.detail-copy ul {
  margin: 0;
  padding-left: 1.2em;
  color: var(--muted);
}

.voice {
  background: #f4f2ec;
}

.voice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1120px;
  margin: 0 auto;
}

.voice-grid article {
  overflow: hidden;
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 26px rgba(24, 33, 31, 0.08);
}

.voice-grid article > img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.voice-copy {
  padding: 26px;
}

.voice-copy h3 {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 21px;
  line-height: 1.45;
}

.voice-grid p {
  margin: 0;
  color: var(--ink);
  font-size: 17px;
}

.voice-grid span {
  display: block;
  margin-bottom: 18px;
  color: var(--orange);
  font-weight: 800;
}

.note {
  max-width: 900px;
  margin: 26px auto 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.host {
  background: var(--paper);
}

.host-card {
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
  max-width: 1120px;
  margin: 0 auto;
}

.host-image img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.host-lead {
  color: var(--green);
  font-size: 18px;
}

.host-message {
  margin-top: 24px;
  padding: 22px;
  border-left: 4px solid var(--orange);
  background: var(--white);
}

.host-message > strong {
  color: var(--green);
  font-size: 18px;
}

.host-message p:last-child {
  margin-bottom: 0;
}

.plans {
  background: #f1eee5;
}

.table-wrap {
  max-width: 1160px;
  margin: 0 auto;
  overflow-x: auto;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.plan-table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
  background: var(--white);
}

.plan-table th,
.plan-table td {
  padding: 18px 16px;
  border: 1px solid var(--line);
  text-align: center;
  vertical-align: middle;
}

.plan-table thead th {
  color: var(--white);
  background: var(--green);
  font-size: 18px;
}

.plan-table thead th span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
}

.plan-table tbody th {
  width: 160px;
  color: var(--green);
  background: var(--green-3);
  text-align: left;
}

.plan-table .recommended {
  background: #fff3ed;
}

.plan-table thead .recommended {
  color: var(--white);
  background: var(--orange);
}

.plan-buttons {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 960px;
  margin: 28px auto 0;
}

.student-benefits {
  max-width: 1080px;
  margin: 52px auto 0;
  padding: clamp(28px, 5vw, 48px);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.student-benefits h3 {
  margin: 0;
  color: var(--green);
  font-size: clamp(26px, 4vw, 38px);
}

.benefit-intro {
  margin: 12px 0 26px;
  color: var(--muted);
}

.student-benefit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.student-benefit-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.student-benefit-grid span,
.student-benefit-grid strong {
  display: block;
}

.student-benefit-grid span {
  color: var(--orange);
  font-weight: 900;
}

.student-benefit-grid strong {
  margin-top: 6px;
  color: var(--green);
  font-size: 21px;
}

.student-benefit-grid p {
  margin: 10px 0 0;
  color: var(--muted);
}

.flow {
  background: var(--paper);
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.flow-list li {
  padding: 24px;
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 26px rgba(24, 33, 31, 0.08);
}

.flow-list span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  color: var(--white);
  border-radius: 50%;
  background: var(--orange);
  font-weight: 900;
}

.flow-list strong {
  display: block;
  font-size: 18px;
}

.flow-list p {
  margin: 8px 0 0;
  color: var(--muted);
}

.bank-transfer {
  max-width: 900px;
  margin: 32px auto 0;
  padding: clamp(26px, 5vw, 42px);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 26px rgba(24, 33, 31, 0.08);
}

.bank-transfer h3 {
  margin: 0;
  color: var(--green);
  font-size: 25px;
}

.bank-transfer > p {
  color: var(--muted);
}

.bank-transfer form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 24px;
}

.bank-transfer label {
  color: var(--green);
  font-weight: 800;
}

.bank-transfer input,
.bank-transfer select,
.bank-transfer textarea {
  width: 100%;
  margin-top: 7px;
  padding: 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  font: inherit;
}

.bank-transfer .full,
.bank-transfer button {
  grid-column: 1 / -1;
}

.bank-transfer button {
  border: 0;
  cursor: pointer;
}

.recommend-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  max-width: 1080px;
  margin: 0 auto;
}

.recommend-list span {
  padding: 12px 18px;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-weight: 800;
}

.faq {
  background: #f4f2ec;
}

.faq-list {
  max-width: 920px;
  margin: 0 auto;
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.faq-list details:first-child {
  border-radius: 8px 8px 0 0;
}

.faq-list details:last-child {
  border-bottom: 0;
  border-radius: 0 0 8px 8px;
}

.faq-list summary {
  cursor: pointer;
  padding: 22px 26px;
  color: var(--green);
  font-size: 18px;
  font-weight: 900;
}

.faq-list p {
  margin: 0;
  padding: 0 26px 24px;
  color: var(--muted);
}

.final-cta {
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(22, 61, 53, 0.94), rgba(22, 61, 53, 0.76)),
    url("https://images.unsplash.com/photo-1554224154-22dec7ec8818?auto=format&fit=crop&w=1600&q=85") center / cover;
}

.final-inner {
  max-width: 820px;
}

.final-inner p:not(.section-label) {
  color: rgba(255, 255, 255, 0.84);
}

.risk-note {
  padding: 28px clamp(20px, 6vw, 80px);
  color: rgba(255, 255, 255, 0.78);
  background: #102f29;
}

.risk-note p {
  max-width: 1120px;
  margin: 0 auto;
  font-size: 13px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 6vw, 80px);
  color: var(--white);
  background: var(--green);
}

.site-footer p {
  margin: 0;
  font-weight: 900;
}

.site-footer div {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
}

@media (max-width: 980px) {
  .nav {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 118px;
  }

  .worry-grid,
  .benefit-grid,
  .reason-grid,
  .voice-grid,
  .flow-list,
  .plan-buttons {
    grid-template-columns: 1fr 1fr;
  }

  .detail-list article,
  .host-card {
    grid-template-columns: 1fr;
  }

  .detail-list article:nth-child(even) .detail-image {
    order: 0;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand {
    font-size: 14px;
  }

  .header-cta {
    min-height: 42px;
    padding-inline: 18px;
    font-size: 14px;
  }

  .hero {
    padding: 104px 18px 44px;
    background:
      linear-gradient(90deg, rgba(22, 61, 53, 0.96), rgba(22, 61, 53, 0.74)),
      url("images/video-learning-with-ryu-v2.png") center / cover;
  }

  .hero h1 {
    font-size: clamp(48px, 15vw, 68px);
  }

  .hero-lead {
    font-size: 17px;
  }

  .hero-buttons,
  .hero-buttons .button,
  .plan-buttons .button {
    width: 100%;
  }

  .hero-stats,
  .worry-grid,
  .benefit-grid,
  .reason-grid,
  .voice-grid,
  .flow-list,
  .plan-buttons {
    grid-template-columns: 1fr;
  }

  .student-benefit-grid,
  .bank-transfer form {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 64px 18px;
  }

  .intro-panel,
  .detail-copy,
  .benefit-grid article,
  .reason-grid article,
  .flow-list li {
    padding: 24px;
  }

  .voice-copy {
    padding: 24px;
  }

  .detail-image img {
    min-height: 230px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}