:root {
  --ink: #19212a;
  --muted: #64717f;
  --line: #dbe3ea;
  --paper: #fbfcfd;
  --soft: #eef4fb;
  --primary: #0717a8;
  --primary-dark: #07106f;
  --coral: #d86f8d;
  --yellow: #f2c84b;
  --blue: #0717a8;
  --white: #ffffff;
  --shadow: 0 18px 48px rgba(31, 48, 64, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  line-height: 1.75;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(251, 252, 253, 0.9);
  border-bottom: 1px solid rgba(219, 227, 234, 0.8);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 700;
}

.brand-logo {
  display: block;
  flex: 0 0 auto;
  width: clamp(110px, 14vw, 158px);
  height: auto;
}

.brand-name,
.brand-sub {
  display: block;
  line-height: 1.2;
}

.brand-name {
  font-size: 15px;
}

.brand-sub {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.nav a:hover {
  color: var(--primary-dark);
}

.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: calc(100vh - 68px);
  padding: clamp(44px, 8vw, 96px) clamp(18px, 6vw, 84px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(9, 12, 18, 0.02) 0%, rgba(9, 12, 18, 0.28) 42%, rgba(9, 12, 18, 0.72) 100%),
    url("./assets/students-sakura-web.jpg") center / cover no-repeat;
}

.hero-copy {
  max-width: 690px;
  color: var(--white);
}

.hero .eyebrow {
  color: #dbe7ff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

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

h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(27px, 3vw, 40px);
  line-height: 1.24;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: 0;
}

.heading-icon {
  display: inline-grid;
  width: 1.65em;
  height: 1.65em;
  margin-right: 0.28em;
  place-items: center;
  border-radius: 50%;
  background: #fff6cf;
  font-size: 0.78em;
  vertical-align: 0.08em;
}

.lead {
  margin: 24px 0 0;
  color: #3d4a55;
  font-size: 17px;
}

.hero .lead {
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 18px rgba(0, 0, 0, 0.26);
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.hero-trust li {
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.92);
  font-size: 13px;
  font-weight: 800;
  backdrop-filter: blur(10px);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.cta-row.center {
  justify-content: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
  line-height: 1.3;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

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

.button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  box-shadow: 0 12px 28px rgba(7, 23, 168, 0.24);
}

.button.secondary {
  background: var(--white);
  color: var(--primary-dark);
}

.micro-copy {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero .micro-copy {
  color: rgba(255, 255, 255, 0.78);
}

.section,
.band {
  padding: clamp(56px, 8vw, 96px) clamp(18px, 6vw, 84px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

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

.section-heading p {
  color: var(--muted);
}

.problem-checklist {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.problem-checklist li {
  position: relative;
  min-height: 72px;
  padding: 18px 18px 18px 52px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: #34424f;
  font-weight: 700;
}

.problem-checklist strong {
  color: #c64262;
  font-weight: 900;
}

.problem-arrow {
  width: 0;
  height: 0;
  margin: 18px auto 0;
  border-right: 16px solid transparent;
  border-left: 16px solid transparent;
  border-top: 20px solid var(--primary);
  filter: drop-shadow(0 8px 12px rgba(7, 23, 168, 0.16));
}

.problem-bridge {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 4px solid var(--primary);
  border-radius: 8px;
  background: var(--soft);
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.problem-bridge::before {
  display: inline-grid;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: #fff6cf;
  color: #9a6a00;
  content: "💡";
  font-size: 18px;
}

.problem-bridge strong {
  color: var(--primary-dark);
  font-weight: 900;
}

.problem-checklist li::before {
  position: absolute;
  top: 20px;
  left: 18px;
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  background: url("./assets/icon-worry.png") center / contain no-repeat;
  content: "";
}

.subject-grid article,
.profile-facts,
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.section-note {
  max-width: 860px;
  margin: 28px 0 0;
  color: var(--muted);
}

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

.cause-heading {
  max-width: none;
  padding: clamp(24px, 5vw, 44px);
  border-radius: 8px;
  background: linear-gradient(135deg, #111827, #07106f);
  box-shadow: var(--shadow);
}

.cause-heading .eyebrow {
  color: #f2c84b;
}

.cause-heading h2 {
  max-width: 960px;
  color: var(--white);
}

.solution-heading {
  max-width: none;
  padding: clamp(24px, 5vw, 44px);
  border-radius: 8px;
  background:
    radial-gradient(circle at 88% 18%, rgba(255, 255, 255, 0.28), transparent 26%),
    linear-gradient(135deg, #063f7a, #0f9f8f);
  box-shadow: var(--shadow);
}

.solution-heading .eyebrow {
  color: #d9fff6;
}

.solution-heading h2 {
  max-width: 980px;
  color: var(--white);
}

.cause-subheading {
  margin-top: 16px;
  margin-bottom: 16px;
}

.cause-question-image {
  display: block;
  width: min(150px, 32vw);
  margin: 0;
}

.cause-insight,
.cause-depth,
.cause-result,
.bedrock-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.cause-focus {
  display: grid;
  gap: 16px;
}

.cause-insight,
.cause-depth,
.cause-result {
  padding: clamp(20px, 4vw, 30px);
}

.card-illustration {
  display: block;
  width: 100%;
  height: 132px;
  object-fit: contain;
  margin-bottom: 18px;
  padding: 14px;
  border-radius: 8px;
  background: linear-gradient(135deg, #eef4fb, #f8edf2);
}

.cause-label {
  display: inline-flex;
  margin: 0 0 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 800;
}

.cause-insight p,
.cause-depth p,
.cause-result p,
.bedrock-box p {
  color: var(--muted);
}

.cause-insight h3 {
  max-width: 820px;
  font-size: clamp(24px, 3vw, 34px);
  color: var(--primary-dark);
}

.cause-checklist {
  margin-top: -16px;
}

.cause-checklist li::before {
  width: auto;
  height: auto;
  background: none;
  color: var(--ink);
  content: "□";
  font-size: 16px;
  font-weight: 900;
}

.cause-checklist strong {
  color: var(--ink);
}

.pretend-understanding {
  max-width: 920px;
  padding: clamp(18px, 3vw, 28px);
  border-left: 4px solid #c64262;
  border-radius: 8px;
  background: var(--white);
}

.pretend-understanding h3 {
  color: var(--ink);
  font-size: clamp(22px, 3vw, 32px);
}

.pretend-understanding p {
  margin: 0;
  color: #34424f;
}

.pretend-understanding p + p {
  margin-top: 12px;
}

.pattern-blocks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.pattern-blocks div {
  display: grid;
  min-height: 76px;
  place-items: center;
  padding: 12px 14px;
  border: 1px solid rgba(198, 66, 98, 0.18);
  border-radius: 8px;
  background: #fff7eb;
  color: var(--ink);
  font-size: 16px;
  font-weight: 900;
  line-height: 1.45;
  text-align: center;
}

.pattern-arrow {
  margin: -4px 0 6px;
  color: #c64262;
  font-size: 34px;
  font-weight: 900;
  line-height: 1;
  text-align: center;
}

.pattern-result {
  display: grid;
  min-height: 64px;
  place-items: center;
  margin: 0 0 16px;
  border: 2px solid rgba(198, 66, 98, 0.28);
  border-radius: 8px;
  background: #fff1f2;
  color: #9f1239;
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 900;
  text-align: center;
}

.pretend-understanding strong {
  color: #c64262;
  font-weight: 900;
}

.cause-transition {
  max-width: 920px;
}

.cause-transition h3 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 32px);
}

.cause-transition p {
  margin: 0;
  color: #34424f;
  font-size: 17px;
  font-weight: 700;
}

.grade-burden {
  display: grid;
  gap: 14px;
}

.grade-burden-title {
  margin: 0;
  color: var(--ink);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 900;
  line-height: 1.2;
}

.grade-burden-diagram {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) auto minmax(260px, 1fr);
  gap: 18px;
  align-items: center;
}

.burden-stack {
  display: grid;
  gap: 10px;
}

.burden-stack div,
.burden-result {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 26px rgba(31, 48, 64, 0.08);
}

.burden-stack div {
  padding: 14px 16px;
  color: #34424f;
  font-weight: 900;
}

.burden-equals {
  color: var(--primary-dark);
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 900;
  line-height: 1;
}

.burden-result {
  display: grid;
  gap: 4px;
  padding: clamp(20px, 4vw, 34px);
  color: var(--ink);
  font-size: clamp(18px, 2.4vw, 28px);
  font-weight: 900;
  text-align: center;
}

.burden-result strong {
  color: #c64262;
  font-size: 1.2em;
}

.cause-depth {
  border-left: 4px solid #c64262;
}

.cause-depth strong {
  color: #c64262;
  font-weight: 900;
}

.cause-result {
  background: #07106f;
  color: var(--white);
}

.cause-result ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.cause-result li {
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #f7fbff;
  font-weight: 800;
}

.cause-result p {
  color: #d8e5eb;
}

.cause-loop {
  display: grid;
  position: relative;
  width: min(760px, 100%);
  min-height: 320px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 0 auto;
}

.negative-spiral-heading {
  max-width: 920px;
  padding: clamp(18px, 4vw, 30px);
  border-radius: 8px;
  background: linear-gradient(135deg, #1f2937, #5b1027);
  box-shadow: var(--shadow);
}

.negative-spiral-heading h3 {
  margin: 0;
  color: var(--white);
  font-size: clamp(24px, 3.4vw, 38px);
}

.loop-item,
.loop-center {
  display: grid;
  place-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 900;
  text-align: center;
}

.loop-item {
  width: 100%;
  min-height: 120px;
  background: #fff7eb;
  color: #4b3b2d;
}

.loop-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 128px;
  height: 128px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  transform: translate(-50%, -50%);
  box-shadow: 0 16px 34px rgba(7, 23, 168, 0.18);
}

.loop-1 {
  grid-column: 1;
  grid-row: 1;
}

.loop-2 {
  grid-column: 1;
  grid-row: 2;
}

.loop-3 {
  grid-column: 2;
  grid-row: 2;
}

.loop-4 {
  grid-column: 2;
  grid-row: 1;
}

.loop-arrow {
  display: none;
}

.bedrock-box {
  margin-top: 16px;
  margin-bottom: 28px;
  padding: clamp(22px, 4vw, 30px);
  background: linear-gradient(135deg, #ffffff, #eef4fb);
  box-shadow: var(--shadow);
}

.self-study-intro {
  max-width: 920px;
  margin-top: 16px;
  padding: clamp(20px, 4vw, 30px);
  border-left: 4px solid #c64262;
  border-radius: 8px;
  background: var(--white);
}

.self-study-question {
  max-width: 920px;
  margin-top: 18px;
}

.self-study-question h3 {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: clamp(24px, 3.4vw, 36px);
}

.self-study-scene {
  display: grid;
  grid-template-columns: minmax(160px, 250px) 1fr;
  align-items: center;
  gap: clamp(16px, 4vw, 32px);
}

.self-study-scene img {
  width: 100%;
  height: auto;
}

.self-study-voice {
  display: grid;
  gap: 12px;
}

.self-study-voice p {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid rgba(198, 66, 98, 0.22);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 900;
  box-shadow: 0 12px 24px rgba(30, 41, 59, 0.08);
}

.self-study-note {
  margin: 16px 0 0;
  color: #34424f;
  font-size: 17px;
  font-weight: 700;
}

.self-study-reason {
  max-width: 920px;
  margin-top: 28px;
}

.self-study-reason h3 {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: clamp(24px, 3.4vw, 36px);
}

.self-study-reason p {
  margin: 0;
  color: #34424f;
  font-size: 17px;
  font-weight: 700;
}

.self-study-intro h3 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 32px);
}

.self-study-intro p {
  margin: 0;
  color: #34424f;
  font-size: 17px;
  font-weight: 700;
}

.self-study-intro p + p {
  margin-top: 12px;
}

.self-study-stuck-scene {
  display: flex;
  align-items: center;
  gap: clamp(16px, 4vw, 36px);
  margin: 18px 0 0;
}

.self-study-stuck-scene img {
  width: min(260px, 34vw);
  height: auto;
  object-fit: contain;
}

.self-study-reason-blocks {
  display: grid;
  gap: 10px;
  flex: 1;
}

.self-study-reason-blocks p {
  margin: 0;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: #34424f;
  font-size: clamp(19px, 3vw, 28px);
  font-weight: 900;
  text-align: center;
}

.self-study-result-block {
  max-width: 920px;
  margin-top: 28px;
}

.self-study-result-block h3 {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: clamp(24px, 3.4vw, 36px);
}

.self-study-result-lead {
  max-width: 760px;
  margin: 0 0 16px;
  color: #34424f;
  font-size: 17px;
  font-weight: 700;
}

.self-study-result-card ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.self-study-result-card li {
  display: grid;
  align-content: start;
  justify-items: center;
  gap: 12px;
  min-height: 176px;
  padding: 12px;
  border: 1px solid rgba(198, 66, 98, 0.14);
  border-radius: 8px;
  background: #fff;
  color: #34424f;
  font-size: 17px;
  font-weight: 800;
}

.self-study-result-card li img {
  width: 100%;
  height: 118px;
  object-fit: contain;
}

.self-study-result-card li span {
  display: block;
  text-align: center;
}

.self-study-needed-card .problem-statement {
  margin: 12px 0;
  color: var(--primary-dark);
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.55;
}

.self-study-needed-card {
  border-left-color: #0f9f8f;
}

.self-study-needed-card h3:not(:first-child) {
  margin-top: 24px;
}

.self-study-needed-card ul {
  display: grid;
  gap: 10px;
  margin: 14px 0;
  padding: 0;
  list-style: none;
}

.self-study-needed-card li {
  padding: 12px 14px;
  border-radius: 8px;
  background: #eaf8f5;
  color: var(--ink);
  font-size: 17px;
  font-weight: 900;
}

.self-study-needed-block {
  max-width: 920px;
  margin-top: 30px;
}

.self-study-needed-block h3 {
  margin-bottom: 12px;
  color: var(--primary-dark);
  font-size: clamp(24px, 3.4vw, 36px);
}

.self-study-needed-block p {
  margin: 0;
  color: #34424f;
  font-size: 17px;
  font-weight: 700;
}

.needed-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  margin: 16px 0 0;
}

.needed-diagram div {
  display: grid;
  min-height: 82px;
  place-items: center;
  padding: 14px;
  border-radius: 8px;
  background: #f1fbf8;
  color: #0f7f73;
  font-size: clamp(18px, 2.5vw, 28px);
  font-weight: 900;
  text-align: center;
}

.needed-diagram-ng {
  margin-top: 18px;
}

.needed-diagram-ng div {
  background: #fff1f2;
  color: #9f1239;
}

.needed-diagram span {
  color: var(--primary-dark);
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 900;
}

.needed-diagram-ng span {
  color: #9f1239;
}

.cause-role-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 18px;
  max-width: 920px;
}

.cause-role-grid article {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid rgba(15, 159, 143, 0.22);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 28px rgba(30, 41, 59, 0.08);
}

.cause-role-grid h3 {
  margin-bottom: 12px;
  color: var(--primary-dark);
  font-size: clamp(20px, 2.4vw, 28px);
}

.cause-role-grid p {
  margin: 0;
  color: #34424f;
  font-size: 16px;
  font-weight: 700;
}

.cause-role-grid p + p,
.cause-role-grid ul + p {
  margin-top: 12px;
}

.cause-role-grid ul {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.cause-role-grid li {
  padding: 10px 12px;
  border-radius: 8px;
  background: #eaf8f5;
  color: var(--ink);
  font-weight: 900;
}

.cause-role-grid li span {
  display: inline-block;
  min-width: 44px;
  margin-right: 8px;
  color: #0f7f73;
}

.cause-role-grid .time-change {
  margin: 14px 0;
  color: #0f7f73;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
}

.efficiency-block {
  max-width: 920px;
  margin-top: 30px;
}

.efficiency-block h3 {
  margin-bottom: 12px;
  color: var(--primary-dark);
  font-size: clamp(24px, 3.4vw, 36px);
}

.efficiency-block p {
  margin: 0;
  color: #34424f;
  font-size: 17px;
  font-weight: 700;
}

.time-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(80px, 0.45fr);
  gap: 10px;
  align-items: center;
  margin: 16px 0;
}

.time-bar {
  display: grid;
  min-height: 46px;
  place-items: center;
  border-radius: 8px;
  color: var(--white);
  font-weight: 900;
}

.time-bar.long {
  background: #9f1239;
}

.time-bar.short {
  background: #0f9f8f;
}

.time-arrow {
  color: var(--primary-dark);
  font-size: 30px;
  font-weight: 900;
}

.efficiency-diagram {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) auto minmax(0, 1.25fr);
  gap: 12px;
  align-items: center;
  margin-top: 18px;
  padding: 14px;
  border: 1px solid rgba(15, 159, 143, 0.18);
  border-radius: 8px;
  background: #f3fbf9;
}

.efficiency-inputs,
.efficiency-results {
  display: grid;
  gap: 8px;
}

.efficiency-inputs div,
.efficiency-results div {
  display: grid;
  min-height: 48px;
  place-items: center;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 900;
  line-height: 1.45;
  text-align: center;
}

.efficiency-inputs div {
  border: 1px solid rgba(15, 127, 115, 0.24);
  background: #dff5ef;
  color: #0f6259;
}

.efficiency-inputs span {
  color: #0f7f73;
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
  text-align: center;
}

.efficiency-arrow {
  color: var(--primary-dark);
  font-size: 34px;
  font-weight: 900;
}

.efficiency-results div {
  border: 1px solid rgba(37, 99, 235, 0.14);
  background: var(--white);
  color: var(--ink);
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.06);
}

.solution-role-grid {
  grid-template-columns: 1fr;
  max-width: 920px;
  margin-top: 0;
}

.lesson-self-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  margin-top: 18px;
}

.lesson-self-block {
  display: grid;
  gap: 8px;
  min-height: 120px;
  place-items: center;
  padding: 16px;
  border: 1px solid rgba(15, 159, 143, 0.18);
  border-radius: 8px;
  background: #f3fbf9;
  text-align: center;
}

.lesson-self-block span {
  display: inline-grid;
  min-width: 70px;
  min-height: 34px;
  place-items: center;
  border-radius: 999px;
  background: #0f9f8f;
  color: var(--white);
  font-size: 15px;
  font-weight: 900;
}

.lesson-self-block p {
  margin: 0;
  color: var(--ink);
  font-size: clamp(16px, 2.4vw, 22px);
  font-weight: 900;
}

.lesson-self-arrows {
  display: grid;
  gap: 8px;
  justify-items: center;
  color: var(--primary-dark);
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 900;
  line-height: 1;
}

.lesson-self-arrows span {
  display: grid;
  align-items: center;
  justify-items: center;
  gap: 4px;
}

.lesson-self-arrows strong {
  color: #0f7f73;
  font-size: 13px;
  font-weight: 900;
  line-height: 1;
  white-space: nowrap;
}

.lesson-self-arrows em {
  color: var(--primary-dark);
  font-style: normal;
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 900;
  line-height: 1;
}

.cause-story {
  display: grid;
  gap: clamp(18px, 4vw, 32px);
}

.cause-myth {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 4vw, 36px);
}

.myth-questions {
  display: grid;
  gap: 10px;
  max-width: 680px;
  margin: 0;
}

.myth-questions p {
  margin: 0;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: #34424f;
  font-size: clamp(19px, 3vw, 28px);
  font-weight: 900;
  text-align: center;
}

.cause-assumption .myth-questions {
  max-width: 760px;
}

.cause-assumption .myth-questions p {
  font-size: clamp(17px, 2.4vw, 24px);
}

.cause-answer {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  line-height: 1.15;
}

.cause-arrows {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: -6px auto -4px;
}

.cause-arrows span {
  width: 0;
  height: 0;
  border-right: 18px solid transparent;
  border-left: 18px solid transparent;
  border-top: 22px solid var(--primary);
  filter: drop-shadow(0 8px 12px rgba(7, 23, 168, 0.16));
}

.cause-core,
.cause-depth,
.cause-summary {
  max-width: 920px;
}

.cause-loop-intro {
  max-width: 920px;
}

.cause-core h3 {
  margin-bottom: 16px;
  color: var(--ink);
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.22;
}

.cause-core h3 strong,
.cause-summary strong {
  color: #c64262;
}

.cause-core p,
.cause-depth p,
.cause-loop-intro p,
.cause-summary p {
  margin: 0;
  color: #34424f;
  font-size: 17px;
}

.cause-depth {
  border: 0;
  border-left: 0;
  background: transparent;
  padding: 0;
}

.cause-depth h3 {
  margin-bottom: 12px;
}

.cause-check-lead {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--ink);
  font-size: 18px;
  font-weight: 900;
}

.cause-check-lead img {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.therefore {
  margin: 0 0 6px;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 900;
  line-height: 1.1;
}

.cause-summary p:last-child {
  color: #34424f;
  font-size: 18px;
  font-weight: 700;
}

.image-message {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: center;
  padding: clamp(56px, 8vw, 96px) clamp(18px, 6vw, 84px);
  background: var(--paper);
}

.image-message img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.image-message p:last-child {
  color: var(--muted);
}

.support-message {
  background: var(--white);
}

.support-message p:last-child {
  max-width: 860px;
  color: var(--muted);
}

.testimonials {
  background: var(--soft);
}

.voice-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.voice-card {
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.student-voice {
  background: var(--white);
}

.voice-card-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.voice-card-head img {
  width: clamp(72px, 11vw, 112px);
  aspect-ratio: 1;
  object-fit: contain;
  flex: 0 0 auto;
}

.voice-label {
  display: inline-flex;
  margin: 0 0 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 800;
}

.voice-card h3 {
  margin-bottom: 0;
}

.voice-qa {
  margin: 0;
}

.voice-qa div {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.voice-qa dt {
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 800;
}

.voice-qa dd {
  margin: 6px 0 0;
  color: var(--muted);
}

.interview {
  background: var(--soft);
}

.interview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.interview-grid article {
  padding: clamp(22px, 4vw, 30px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.interview-grid ul {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding-left: 1.2em;
  color: var(--muted);
}

.strengths {
  background: var(--white);
}

.strength-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.strength-grid article {
  position: relative;
  display: grid;
  gap: 18px;
  align-content: start;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff, #f7f9fd);
}

.strength-card-head {
  display: grid;
  gap: 10px;
}

.strength-card-head h3 {
  margin: 0;
}

.strength-card-body {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 16px;
  align-items: end;
}

.strength-grid article:first-child .strength-card-body,
.strength-grid article:nth-child(2) .strength-card-body,
.strength-grid article:nth-child(3) .strength-card-body,
.strength-grid article:nth-child(4) .strength-card-body,
.strength-grid article:nth-child(5) .strength-card-body {
  grid-template-columns: 140px minmax(0, 1fr);
}

.strength-icon {
  display: block;
  width: 92px;
  height: 92px;
  object-fit: contain;
  padding: 10px;
  border-radius: 8px;
  background: var(--soft);
}

.strength-icon-large {
  width: 140px;
  height: 140px;
  padding: 0;
  background: transparent;
}

.strength-grid p {
  color: var(--muted);
}

.solution-story {
  display: grid;
  gap: clamp(18px, 4vw, 32px);
}

.solution-core,
.solution-understanding,
.solution-positioning {
  max-width: 920px;
}

.solution-core h3 {
  margin-bottom: 16px;
  padding: clamp(18px, 4vw, 30px);
  border-radius: 8px;
  background:
    radial-gradient(circle at 88% 18%, rgba(255, 255, 255, 0.52), transparent 28%),
    linear-gradient(135deg, #f2c84b, #f8df86);
  color: var(--ink);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.25;
  box-shadow: var(--shadow);
}

.solution-core p,
.solution-understanding p {
  margin: 0;
  color: #34424f;
  font-size: 17px;
}

.solution-core strong {
  color: #c64262;
  font-weight: 900;
}

.solution-contrast {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
  max-width: 920px;
  margin-bottom: 14px;
}

.contrast-title {
  margin: 0;
  padding: 16px 18px;
  border-radius: 8px;
  color: var(--ink);
  font-size: clamp(20px, 3vw, 30px);
  text-align: center;
}

.weak-title {
  background: #fff7eb;
}

.strong-title {
  background: #eaf8f5;
  color: #0f7f73;
}

.contrast-row {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.contrast-row p {
  display: grid;
  min-height: 74px;
  place-items: center;
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: #34424f;
  font-size: 17px;
  font-weight: 900;
  text-align: center;
}

.contrast-row p:first-child {
  border-color: rgba(198, 66, 98, 0.18);
  background: #fff7eb;
}

.contrast-row p:last-child {
  border-color: rgba(15, 159, 143, 0.24);
  background: #f1fbf8;
  color: #0f7f73;
}

.solution-key-message {
  display: grid;
  gap: 10px;
  max-width: 920px;
}

.solution-key-message p {
  width: fit-content;
  margin: 0;
  padding: 10px 14px;
  border-left: 4px solid #c64262;
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  font-size: clamp(18px, 2.4vw, 26px);
  font-weight: 900;
}

.solution-main-message {
  max-width: 920px;
  padding: clamp(20px, 4vw, 30px);
  border-left: 4px solid #0f9f8f;
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 28px rgba(30, 41, 59, 0.08);
}

.solution-main-message h3 {
  margin-bottom: 12px;
  color: var(--primary-dark);
  font-size: clamp(24px, 3.4vw, 38px);
}

.solution-main-message p {
  width: auto;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  color: #34424f;
  font-size: 17px;
  font-weight: 700;
}

.teaching-method {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 1100px;
}

.teaching-method article {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid rgba(15, 159, 143, 0.22);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 28px rgba(30, 41, 59, 0.08);
}

.teaching-method span {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  margin-bottom: 14px;
  border-radius: 50%;
  background: #0f9f8f;
  color: var(--white);
  font-size: 14px;
  font-weight: 900;
}

.teaching-method h3 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: clamp(20px, 2.3vw, 28px);
}

.teaching-method p {
  margin: 0;
  color: #34424f;
  font-size: 16px;
  font-weight: 700;
}

.solution-understanding {
  padding: clamp(22px, 4vw, 30px);
  border-radius: 8px;
  background: linear-gradient(135deg, #ffffff, #eef4fb);
  box-shadow: var(--shadow);
}

.solution-understanding p + .understanding-diagram {
  margin-top: 16px;
}

.understanding-diagram {
  display: grid;
  grid-template-columns: minmax(180px, 0.7fr) auto minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

.understanding-source {
  display: grid;
  min-height: 178px;
  place-items: center;
  padding: 18px;
  border-radius: 8px;
  background: linear-gradient(135deg, #f2c84b, #f8df86);
  color: var(--ink);
  font-size: clamp(24px, 3.5vw, 40px);
  font-weight: 900;
  text-align: center;
  box-shadow: 0 12px 28px rgba(30, 41, 59, 0.08);
}

.understanding-results {
  display: grid;
  gap: 10px;
}

.understanding-arrow {
  color: var(--primary-dark);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 900;
  line-height: 1;
}

.understanding-results div {
  padding: 14px 16px;
  border: 1px solid rgba(15, 159, 143, 0.22);
  border-radius: 8px;
  background: #f1fbf8;
  color: #0f7f73;
  font-size: 17px;
  font-weight: 900;
}

.solution-result {
  padding: clamp(22px, 4vw, 30px);
  border-radius: 8px;
  background: #07106f;
  color: var(--white);
}

.solution-result ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.solution-result li {
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #f7fbff;
  font-weight: 800;
}

.solution-positioning {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.solution-positioning div {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.solution-positioning span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.solution-positioning p {
  margin: 0;
  color: var(--ink);
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 900;
}

.solution-positioning div {
  border-color: rgba(7, 23, 168, 0.25);
  background: #eef4fb;
}

.solution-cta {
  display: grid;
  justify-items: start;
  gap: 10px;
  max-width: none;
  margin-top: -6px;
  padding: clamp(28px, 5vw, 46px) 0;
  border-top: 4px solid #0f9f8f;
  border-radius: 0;
  background: #eefbf8;
  box-shadow: 0 0 0 100vmax #eefbf8;
  clip-path: inset(0 -100vmax);
}

.solution-cta p {
  margin: 0;
  color: #64748b;
  font-size: 14px;
  font-weight: 700;
}

.solution-cta .solution-cta-lead {
  color: var(--ink);
  font-size: clamp(18px, 2.6vw, 24px);
  font-weight: 900;
}

.subject-grid p,
.profile-summary p,
.flow p,
.faq-list p,
.final-cta p {
  color: var(--muted);
}

.number {
  display: inline-block;
  color: var(--coral);
  font-weight: 800;
}

.band {
  background: var(--soft);
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.subject-grid article {
  padding: 26px;
}

.subject-visual {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 18px;
}

.subject-placeholder {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #eef4fb, #f8edf2);
}

.subject-placeholder::before {
  position: absolute;
  inset: 18px;
  border: 1px dashed rgba(7, 23, 168, 0.24);
  border-radius: 8px;
  content: "";
}

.subject-placeholder span {
  position: absolute;
  display: block;
  background: var(--primary);
  box-shadow: 0 10px 24px rgba(7, 23, 168, 0.14);
}

.subject-placeholder span:first-child {
  left: 24%;
  bottom: 26%;
  width: 24%;
  height: 36%;
  border-radius: 6px;
  transform: rotate(-8deg);
}

.subject-placeholder span:nth-child(2) {
  left: 42%;
  bottom: 23%;
  width: 24%;
  height: 48%;
  border-radius: 6px;
  background: #d86f8d;
}

.subject-placeholder span:nth-child(3) {
  right: 20%;
  bottom: 28%;
  width: 24%;
  height: 32%;
  border-radius: 6px;
  transform: rotate(8deg);
}

.price {
  background: var(--white);
}

.price-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 0.85fr) minmax(320px, 1.1fr);
  gap: 18px;
  align-items: stretch;
}

.price-card,
.lesson-preview,
.info-grid p {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.price-card {
  padding: clamp(24px, 4vw, 34px);
  box-shadow: var(--shadow);
}

.price-label {
  display: inline-flex;
  max-width: 100%;
  margin: 0 0 14px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.45;
  white-space: normal;
}

.price-card h3 {
  margin-bottom: 14px;
  font-size: clamp(28px, 3vw, 42px);
  color: var(--primary-dark);
}

.add-on-card {
  background: var(--white);
}

.lesson-preview {
  overflow: hidden;
  background: #07106f;
  color: var(--white);
}

.lesson-preview-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.lesson-preview-head span,
.lesson-preview-body p {
  color: #dbe7ff;
  font-size: 13px;
  font-weight: 800;
}

.lesson-preview-body {
  padding: clamp(22px, 4vw, 34px);
}

.lesson-preview-body p {
  margin: 0 0 8px;
}

.lesson-video {
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-top: 12px;
  border-radius: 8px;
  background: #020617;
}

.lesson-video iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.lesson-preview-body .lesson-video-note {
  margin: 12px 0 0;
  color: #d8e5eb;
  font-size: 13px;
  font-weight: 700;
}

.lesson-preview-body strong {
  display: block;
  max-width: 520px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.35;
}

.lesson-preview-body ul {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.lesson-preview-body li {
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #d8e5eb;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.info-grid p {
  margin: 0;
  padding: 18px;
  color: var(--muted);
  font-weight: 700;
}

.profile {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: clamp(24px, 5vw, 64px);
  align-items: start;
  background: var(--white);
}

.story {
  background: var(--white);
}

.story-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: start;
}

.story-layout p {
  max-width: 820px;
  color: var(--muted);
}

.profile-summary p {
  max-width: 820px;
}

.profile-facts {
  display: grid;
  gap: 0;
  margin: 0;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.profile-photo {
  margin: 0;
  padding: 18px;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.profile-photo img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center 42%;
  padding: 22px;
  border-radius: 8px;
  background: linear-gradient(135deg, #eef4fb, #f8edf2);
}

.profile-photo figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.mobile-photo {
  display: none;
}

.profile-facts div {
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.profile-facts div:last-child {
  border-bottom: 0;
}

.profile-facts dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.profile-facts dd {
  margin: 4px 0 0;
  font-weight: 800;
}

.flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.trial-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 18px;
  align-items: start;
}

.trial-block {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.trial-block > h3 {
  margin-bottom: 18px;
}

.compact-flow {
  grid-template-columns: 1fr;
}

.flow li {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 14px;
  padding: 22px 18px;
  border-top: 3px solid var(--primary);
  background: var(--white);
}

.trial-block .flow li {
  border-top-width: 0;
  border-left: 3px solid var(--primary);
  border-radius: 8px;
  background: #fbfcfd;
}

.flow-visual {
  grid-column: 1 / -1;
  display: block;
  width: 100%;
  height: 128px;
  object-fit: contain;
  padding: 14px;
  border-radius: 8px;
  background: linear-gradient(135deg, #eef4fb, #f8edf2);
}

.compact-flow .flow-visual {
  height: 112px;
}

.trial-note {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.trial-note p {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.trial-note .button {
  margin-left: auto;
}

.flow span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  font-weight: 800;
}

.flow h3 {
  font-size: 17px;
}

.flow p {
  margin: 0;
  font-size: 14px;
}

.faq-list {
  display: grid;
  gap: 10px;
  max-width: 940px;
}

.faq-list details {
  padding: 18px 20px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 800;
}

.faq-list p {
  margin: 10px 0 0;
}

.final-cta {
  padding: clamp(58px, 8vw, 104px) clamp(18px, 6vw, 84px);
  background: #07106f;
  color: var(--white);
  text-align: center;
}

.final-cta h2 {
  max-width: 840px;
  margin: 0 auto;
}

.final-cta p {
  max-width: 760px;
  margin: 20px auto 0;
  color: #c8d7de;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px clamp(18px, 6vw, 84px);
  background: #040a3c;
  color: #d8e5eb;
  font-size: 14px;
}

.footer p {
  margin: 0;
}

.footer a {
  color: #dbe7ff;
}

@media (max-width: 980px) {
  .profile {
    grid-template-columns: 1fr;
  }

  .profile-facts .profile-photo {
    display: none;
  }

  .mobile-photo {
    display: block;
    max-width: 420px;
    margin: 22px 0;
    padding: 0;
    border: 0;
    box-shadow: var(--shadow);
  }

  .mobile-photo figcaption {
    padding: 0 14px 14px;
  }

  .hero {
    min-height: auto;
    justify-content: flex-start;
    background:
      linear-gradient(90deg, rgba(9, 12, 18, 0.72) 0%, rgba(9, 12, 18, 0.5) 100%),
      url("./assets/students-sakura-web.jpg") 30% center / cover no-repeat;
  }

  .problem-checklist,
  .image-message,
  .voice-grid,
  .interview-grid,
  .cause-grid,
  .strength-grid,
  .story-layout,
  .trial-layout,
  .subject-grid,
  .price-layout,
  .info-grid,
  .flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .solution-contrast {
    gap: 8px;
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
  }

  .nav {
    display: none;
  }

  .brand-name {
    font-size: 14px;
  }

  .brand-logo {
    width: 106px;
  }

  .hero {
    padding-top: 42px;
  }

  .intro {
    padding-top: 38px;
    padding-bottom: 38px;
  }

  .intro .section-heading {
    margin-bottom: 14px;
  }

  .intro .section-heading p {
    font-size: 13px;
    line-height: 1.6;
  }

  .problem-checklist,
  .image-message,
  .voice-grid,
  .interview-grid,
  .cause-grid,
  .strength-grid,
  .story-layout,
  .trial-layout,
  .subject-grid,
  .price-layout,
  .info-grid,
  .flow {
    grid-template-columns: 1fr;
  }

  .solution-core p,
  .solution-understanding p {
    font-size: 14px;
    line-height: 1.7;
  }

  .understanding-diagram {
    grid-template-columns: minmax(92px, 0.7fr) auto minmax(0, 1fr);
    gap: 6px;
  }

  .understanding-source {
    min-height: 146px;
    padding: 12px;
    font-size: 20px;
  }

  .understanding-arrow {
    font-size: 28px;
  }

  .understanding-results div {
    padding: 10px 12px;
    font-size: 13px;
    line-height: 1.45;
  }

  .contrast-title {
    padding: 12px 10px;
    font-size: 15px;
  }

  .contrast-row {
    gap: 8px;
  }

  .contrast-row p {
    min-height: 64px;
    padding: 10px 8px;
    font-size: 13px;
    line-height: 1.45;
  }

  .solution-key-message p {
    width: 100%;
    font-size: 16px;
  }

  .solution-main-message p {
    font-size: 14px;
    line-height: 1.7;
  }

  .teaching-method {
    grid-template-columns: 1fr;
  }

  .teaching-method p {
    font-size: 14px;
    line-height: 1.7;
  }

  .solution-result ul,
  .solution-positioning {
    grid-template-columns: 1fr;
  }

  .strength-card-body {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 12px;
  }

  .strength-grid article:first-child .strength-card-body,
  .strength-grid article:nth-child(2) .strength-card-body,
  .strength-grid article:nth-child(3) .strength-card-body,
  .strength-grid article:nth-child(4) .strength-card-body,
  .strength-grid article:nth-child(5) .strength-card-body {
    grid-template-columns: 104px minmax(0, 1fr);
  }

  .strength-icon {
    width: 74px;
    height: 74px;
    padding: 8px;
  }

  .strength-icon-large {
    width: 104px;
    height: 104px;
    padding: 0;
  }

  .voice-card-head {
    gap: 12px;
  }

  .voice-card-head img {
    width: 72px;
  }

  .solution-cta {
    margin-top: -6px;
  }

  .problem-checklist {
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
  }

  .problem-checklist li {
    min-height: 0;
    padding: 9px 12px 9px 38px;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
    font-size: 13px;
    line-height: 1.45;
  }

  .problem-checklist li:last-child {
    border-bottom: 0;
  }

  .problem-checklist li::before {
    top: 9px;
    left: 10px;
    width: 22px;
    height: 22px;
  }

  .problem-checklist strong {
    font-weight: 900;
  }

  .problem-arrow {
    margin-top: 10px;
    border-right-width: 12px;
    border-left-width: 12px;
    border-top-width: 14px;
  }

  .problem-bridge {
    margin-top: 12px;
    padding: 11px 12px;
    font-size: 15px;
    line-height: 1.45;
  }

  .problem-bridge::before {
    width: 24px;
    height: 24px;
    font-size: 15px;
  }

  .intro .section-note {
    margin-top: 14px;
    font-size: 13px;
    line-height: 1.6;
  }

  .cause-focus {
    gap: 12px;
  }

  .cause-insight,
  .cause-depth,
  .cause-result,
  .bedrock-box {
    padding: 18px;
  }

  .self-study-intro {
    padding: 18px;
  }

  .self-study-scene {
    grid-template-columns: 120px 1fr;
    gap: 12px;
  }

  .self-study-voice {
    gap: 8px;
  }

  .self-study-voice p {
    padding: 12px 14px;
    font-size: 15px;
  }

  .self-study-note {
    font-size: 14px;
    line-height: 1.7;
  }

  .self-study-reason p {
    font-size: 14px;
    line-height: 1.7;
  }

  .self-study-stuck-scene {
    gap: 8px;
    margin-bottom: 14px;
  }

  .self-study-stuck-scene img {
    width: 112px;
  }

  .self-study-reason-blocks p {
    padding: 11px 12px;
    font-size: 15px;
  }

  .self-study-intro p {
    font-size: 14px;
    line-height: 1.7;
  }

  .self-study-result-card li {
    min-height: 140px;
    padding: 10px;
    font-size: 14px;
    line-height: 1.7;
  }

  .self-study-result-lead {
    font-size: 14px;
    line-height: 1.7;
  }

  .self-study-result-card li img {
    width: 100%;
    height: 82px;
  }

  .self-study-needed-card .problem-statement {
    font-size: 18px;
  }

  .self-study-needed-card li {
    font-size: 14px;
    line-height: 1.6;
  }

  .self-study-needed-block h3 {
    font-size: 22px;
  }

  .self-study-needed-block p {
    font-size: 14px;
    line-height: 1.7;
  }

  .needed-diagram {
    gap: 6px;
  }

  .needed-diagram div {
    min-height: 66px;
    padding: 10px;
    font-size: 14px;
  }

  .needed-diagram span {
    font-size: 28px;
  }

  .cause-role-grid {
    grid-template-columns: 1fr;
  }

  .cause-role-grid p {
    font-size: 14px;
    line-height: 1.7;
  }

  .efficiency-block h3 {
    font-size: 22px;
  }

  .efficiency-block p {
    font-size: 14px;
    line-height: 1.7;
  }

  .cause-role-grid li {
    font-size: 14px;
  }

  .lesson-self-diagram {
    gap: 6px;
  }

  .lesson-self-block {
    min-height: 96px;
    padding: 10px 8px;
  }

  .lesson-self-block span {
    min-width: 52px;
    min-height: 28px;
    font-size: 13px;
  }

  .lesson-self-block p {
    font-size: 13px;
    line-height: 1.5;
  }

  .lesson-self-arrows {
    font-size: 21px;
  }

  .lesson-self-arrows strong {
    font-size: 10px;
  }

  .lesson-self-arrows em {
    font-size: 21px;
  }

  .time-diagram {
    grid-template-columns: minmax(0, 1fr) auto minmax(54px, 0.45fr);
    gap: 6px;
  }

  .time-bar {
    min-height: 38px;
    font-size: 13px;
  }

  .time-arrow {
    font-size: 24px;
  }

  .efficiency-diagram {
    grid-template-columns: minmax(0, 0.92fr) auto minmax(0, 1.08fr);
    gap: 6px;
    padding: 10px;
  }

  .efficiency-inputs,
  .efficiency-results {
    gap: 6px;
  }

  .efficiency-inputs div,
  .efficiency-results div {
    min-height: 42px;
    padding: 8px 6px;
    font-size: 12px;
  }

  .efficiency-inputs span {
    font-size: 18px;
  }

  .efficiency-arrow {
    font-size: 24px;
  }

  .cause-result ul {
    grid-template-columns: 1fr;
  }

  .cause-loop {
    display: grid;
    position: relative;
    width: 100%;
    min-height: 260px;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 14px;
    margin: 0;
  }

  .loop-item,
  .loop-arrow {
    position: static;
    transform: none;
  }

  .loop-center {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 1;
    width: 92px;
    height: 92px;
    padding: 10px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
  }

  .loop-item {
    width: 100%;
    min-height: 86px;
    padding: 12px;
    font-size: 13px;
  }

  .loop-1 {
    grid-column: 1;
    grid-row: 1;
  }

  .loop-2 {
    grid-column: 1;
    grid-row: 2;
  }

  .loop-3 {
    grid-column: 2;
    grid-row: 2;
  }

  .loop-4 {
    grid-column: 2;
    grid-row: 1;
  }

  .loop-arrow {
    display: none;
  }

  .loop-item + .loop-item {
    margin-top: 0;
  }

  .loop-item + .loop-item::before,
  .loop-item + .loop-item::after {
    content: none;
  }

  .cause-arrows {
    margin: -2px auto -2px;
    gap: 6px;
  }

  .cause-arrows span {
    border-right-width: 12px;
    border-left-width: 12px;
    border-top-width: 14px;
  }

  .myth-questions p {
    padding: 11px 12px;
    font-size: 18px;
  }

  .cause-myth {
    align-items: center;
    gap: 12px;
  }

  .cause-question-image {
    width: 84px;
  }

  .cause-answer {
    font-size: 30px;
  }

  .cause-core p,
  .cause-depth p,
  .cause-loop-intro p,
  .cause-summary p:last-child {
    font-size: 14px;
    line-height: 1.7;
  }

  .cause-check-lead {
    font-size: 15px;
    line-height: 1.55;
  }

  .cause-check-lead img {
    width: 28px;
    height: 28px;
  }

  .pretend-understanding {
    padding: 16px;
  }

  .pretend-understanding p {
    font-size: 14px;
    line-height: 1.7;
  }

  .pattern-blocks {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .pattern-blocks div {
    min-height: 52px;
    font-size: 14px;
  }

  .pattern-arrow {
    font-size: 28px;
  }

  .pattern-result {
    min-height: 54px;
    font-size: 18px;
  }

  .cause-transition p {
    font-size: 14px;
    line-height: 1.7;
  }

  .grade-burden {
    gap: 10px;
  }

  .grade-burden-title {
    font-size: 22px;
  }

  .grade-burden-diagram {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 8px;
    align-items: center;
  }

  .burden-stack {
    gap: 8px;
  }

  .burden-stack div {
    padding: 11px 12px;
    font-size: 13px;
  }

  .burden-equals {
    font-size: 24px;
    text-align: center;
  }

  .burden-result {
    padding: 14px 10px;
    font-size: 14px;
  }

  .button {
    width: 100%;
  }

  .footer {
    flex-direction: column;
  }
}