:root {
  --ink: #14171d;
  --text: #3e434b;
  --muted: #757981;
  --yellow: #ffe600;
  --cream: #fffdf4;
  --soft: #f7f7f4;
  --line: #deded8;
  --green: #08a32a;
  --red: #e91b16;
  --shadow: 0 22px 50px rgba(20, 23, 29, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-bottom: 104px;
  color: var(--text);
  background: var(--cream);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.8;
}

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

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

mark {
  display: inline-block;
  max-width: 100%;
  padding: 0 0.16em 0.05em;
  border-radius: 6px;
  background: var(--yellow);
  color: var(--ink);
  overflow-wrap: anywhere;
}

.nowrap {
  white-space: nowrap;
}

.sp-break {
  display: none;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  display: flex;
  min-height: 86px;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 8px clamp(22px, 6vw, 98px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  width: clamp(118px, 10.5vw, 138px);
  height: auto;
  aspect-ratio: 1254 / 748;
  flex: 0 0 auto;
  align-items: center;
  line-height: 0;
}

.brand img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.2vw, 36px);
  color: #282c33;
  font-size: 15px;
  white-space: nowrap;
}

.site-nav a {
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  opacity: 0.72;
}

.nav-cta {
  padding: 16px 28px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  min-height: calc(100vh - 86px);
  grid-template-columns: 1.05fr 0.95fr;
  align-items: stretch;
  border-bottom: 6px solid #333;
  background: #fffdf4;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(60px, 8vw, 112px) clamp(28px, 6.8vw, 124px);
}

.alert {
  position: relative;
  display: inline-flex;
  width: max-content;
  max-width: 100%;
  min-height: 72px;
  align-items: center;
  gap: 0;
  margin: 0 0 36px;
  padding: 0 24px 0 0;
  overflow: hidden;
  border: 2px solid var(--yellow);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font-size: clamp(16px, 1.45vw, 21px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.alert span {
  display: inline-grid;
  width: 112px;
  min-height: 72px;
  align-self: stretch;
  place-items: center;
  margin: -2px 12px -2px -2px;
  padding-right: 22px;
  clip-path: polygon(0 0, 100% 0, 68% 100%, 0 100%);
  background: var(--yellow);
  color: var(--ink);
  flex: 0 0 auto;
  font-size: 30px;
  font-weight: 900;
  line-height: 1;
}

.hero h1 {
  max-width: 840px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(44px, 6.6vw, 92px);
  font-weight: 950;
  line-height: 1.22;
}

.hero h1 mark {
  margin: 6px 0;
}

.hero-lead {
  max-width: 820px;
  margin: 28px 0 34px;
  color: #464b54;
  font-size: clamp(17px, 1.7vw, 23px);
  line-height: 1.9;
}

.proofs {
  display: grid;
  max-width: 760px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.proofs img {
  width: 100%;
}

.hero-photo {
  position: relative;
  min-height: 620px;
  overflow: hidden;
  background: #17191f;
}

.hero-slide {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  transform: scale(1);
  transition: opacity 0.9s ease;
}

.hero-slide.is-active {
  z-index: 1;
  opacity: 1;
  animation: hero-slide-zoom-out 3.2s ease-out both;
}

.hero-slide:first-child.is-active {
  animation-duration: 2.4s;
}

@keyframes hero-slide-zoom-out {
  from {
    transform: scale(1.035);
  }

  to {
    transform: scale(1);
  }
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-actions {
  position: fixed;
  z-index: 80;
  right: 50%;
  bottom: 18px;
  display: grid;
  width: min(820px, 74vw);
  grid-template-columns: 1fr 1fr;
  gap: clamp(18px, 4vw, 84px);
  transform: translateX(50%);
}

.hero-actions .button {
  min-height: 58px;
  padding-top: 12px;
  padding-bottom: 12px;
  font-weight: 800;
}

.button {
  display: inline-flex;
  min-height: 64px;
  align-items: center;
  justify-content: center;
  padding: 16px 28px;
  color: #fff;
  font-size: clamp(19px, 2vw, 26px);
  font-weight: 900;
  line-height: 1.25;
  text-align: center;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.2);
}

.button::after {
  margin-left: 0.5em;
  content: ">";
}

.button-muted {
  background: #6c6c45;
  box-shadow: inset 0 -18px 0 rgba(0, 0, 0, 0.08);
}

.button-line {
  background: var(--green);
  box-shadow: inset 0 -18px 0 rgba(0, 0, 0, 0.08);
}

.button-black {
  min-width: min(520px, 100%);
  border-radius: 999px;
  background: #000;
  flex-direction: column;
  gap: 4px;
}

.button-black::after {
  content: "";
}

.button-black small {
  display: inline-block;
  margin-top: -28px;
  padding: 5px 36px;
  border-radius: 7px;
  background: var(--yellow);
  color: var(--ink);
  font-size: 14px;
}

.button-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.button-label::after {
  margin-left: 0.5em;
  content: ">";
  flex: 0 0 auto;
}

.section,
.faq-list {
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
}

.section-heading {
  text-align: center;
}

.section-heading > span,
.section-label,
.policy-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 106px;
  margin-bottom: 30px;
  padding: 8px 24px;
  border-radius: 999px;
  background: var(--yellow);
  color: var(--ink);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.22em;
  line-height: 1;
}

.section-heading h2,
.contact h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(34px, 4.7vw, 64px);
  font-weight: 950;
  line-height: 1.35;
}

.section-heading p {
  max-width: 900px;
  margin: 28px auto 0;
  color: #555a63;
  font-size: clamp(16px, 1.65vw, 21px);
}

.light span {
  background: transparent;
  color: #fff;
}

.light h2 {
  color: #fff;
}

.dark-section {
  position: relative;
  overflow: hidden;
  padding: 136px 22px 130px;
  background: #272727;
  color: #fff;
}

.problem::before {
  position: absolute;
  inset: 0;
  content: "";
  background: url("./assets/problem-bg.png") center top / cover no-repeat;
}

.problem > * {
  position: relative;
}

.problem-grid {
  display: grid;
  width: min(1180px, 100%);
  margin: 68px auto 100px;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-grid article {
  min-height: 260px;
  padding: clamp(26px, 3vw, 42px);
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.35);
}

.problem-grid h3 {
  margin: 0 0 22px;
  color: #fff;
  font-size: clamp(21px, 2.35vw, 31px);
  line-height: 1.45;
  word-break: keep-all;
  overflow-wrap: normal;
}

.problem-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 16px;
}

.why-card {
  display: grid;
  width: min(1120px, 100%);
  margin: 0 auto;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 56px;
  align-items: center;
  padding: clamp(36px, 5vw, 70px);
  border-radius: 18px;
  background: #fff;
  color: var(--text);
  box-shadow: var(--shadow);
}

.why-card h3 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(29px, 3.8vw, 52px);
  line-height: 1.38;
  word-break: keep-all;
  overflow-wrap: normal;
}

.why-card p {
  margin: 0;
  font-size: clamp(16px, 1.6vw, 21px);
}

.reasons {
  padding: 132px 0 120px;
  background: #fff;
  box-shadow: 0 0 0 100vmax #fff;
  clip-path: inset(0 -100vmax);
}

.reasons .section-heading h2 {
  display: block;
  width: max-content;
  max-width: 100%;
  margin: 0 auto;
  padding: 0;
  font-size: clamp(32px, 4.2vw, 58px);
  font-weight: 880;
  text-shadow: 3px 3px 0 rgba(255, 230, 0, 0.55);
}

.reason-grid,
.case-grid {
  display: grid;
  margin-top: 70px;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.reason-grid article,
.case-grid article {
  overflow: hidden;
  border: 1px solid #deded8;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 8px 18px rgba(20, 23, 29, 0.04);
}

.reason-grid img,
.case-grid > article > img {
  width: 100%;
  aspect-ratio: 1.78 / 1;
  object-fit: cover;
}

.reason-grid article > :not(img):not(.reason-split-image),
.case-grid article > :not(img) {
  margin-left: 24px;
  margin-right: 24px;
}

.reason-split-image {
  display: grid;
  aspect-ratio: 1.78 / 1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
}

.reason-grid .reason-split-image img {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: cover;
}

.eyebrow {
  margin-top: 30px;
  margin-bottom: 12px;
  color: #83868e;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.15em;
}

.reason-grid h3,
.case-grid h4,
.product-grid h4,
.flow-list h3 {
  margin-top: 0;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: clamp(24px, 2.5vw, 32px);
  line-height: 1.35;
}

.reason-grid article > p:last-child {
  margin-bottom: 42px;
  color: #525760;
  font-size: 16px;
}

.policy {
  padding: 70px 22px 136px;
  background: linear-gradient(#fff 0 50%, var(--cream) 50% 100%);
  text-align: center;
}

.policy-box {
  position: relative;
  width: min(1040px, 100%);
  margin: 0 auto;
  padding: clamp(42px, 7vw, 80px);
  border: 42px solid var(--yellow);
  border-radius: 18px;
  background: #fff;
  overflow: visible;
}

.policy-title {
  position: relative;
  z-index: 1;
  left: 50%;
  display: grid;
  justify-items: center;
  width: min(920px, calc(100% + 120px));
  max-width: calc(100vw - 72px);
  margin: -150px 0 72px;
  padding: clamp(28px, 4.2vw, 46px) clamp(22px, 5vw, 60px);
  gap: 8px;
  border-radius: 14px;
  background: #000;
  color: #fff;
  font-size: clamp(28px, 3.7vw, 48px);
  font-weight: 950;
  line-height: 1.32;
  text-align: center;
  transform: translateX(-50%);
  word-break: keep-all;
  overflow-wrap: normal;
}

.policy-title-main,
.policy-title-sub {
  display: block;
}

.policy-title-main {
  white-space: nowrap;
}

.policy-title strong {
  color: var(--yellow);
  font: inherit;
}

.policy-title mark {
  background: #fff;
  padding: 0.02em 0.32em 0.1em;
  white-space: nowrap;
}

.policy-box p {
  max-width: 820px;
  margin: 0 auto 20px;
  font-size: clamp(16px, 1.55vw, 20px);
}

.policy-actions {
  display: grid;
  justify-items: center;
  gap: 16px;
  margin-top: 42px;
}

.policy-box .policy-actions .button {
  width: min(520px, 100%);
  margin-top: 0;
}

.policy-line-cta {
  border-radius: 999px;
}

.structure {
  padding: 118px 0 120px;
}

.table-wrap {
  margin-top: 70px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  min-width: 820px;
  border-collapse: collapse;
  background: #fff;
  font-size: 17px;
}

th,
td {
  padding: 30px 28px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}

thead th:first-child {
  background: var(--ink);
  color: #fff;
}

thead th:nth-child(2) {
  background: #efefeb;
}

thead th:nth-child(3) {
  background: var(--yellow);
  color: #000;
}

tbody th,
tbody td:last-child {
  color: var(--ink);
  font-weight: 900;
}

tbody td:nth-child(2) {
  color: #7c8088;
}

.lineup,
.cases,
.flow {
  padding: 118px 0;
}

.lineup {
  scroll-margin-top: 86px;
}

.product-grid {
  display: grid;
  margin-top: 70px;
  grid-template-columns: repeat(3, 1fr);
  gap: 50px 32px;
}

.lineup-category {
  margin-top: 78px;
}

.lineup-category + .lineup-category {
  margin-top: 110px;
  padding-top: 82px;
  border-top: 1px solid var(--line);
}

.lineup-category-title {
  margin: 0;
  color: var(--ink);
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.35;
  text-align: center;
}

.lineup-category-title span {
  display: block;
  margin-bottom: 10px;
  color: #858992;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.24em;
}

.lineup-category .product-grid {
  margin-top: 42px;
}

.product-grid img {
  width: 100%;
  aspect-ratio: 1.456 / 1;
  border-radius: 12px;
  object-fit: cover;
}

.product-grid img.product-image-contain {
  padding: 18px;
  background: #fff;
  object-fit: contain;
}

.product-grid h4 {
  margin-top: 24px;
}

.en {
  margin: -10px 0 18px;
  color: #858992;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.22em;
}

.product-grid p:not(.en) {
  margin: 0 0 20px;
  font-size: 16px;
}

.product-grid div {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.product-grid span {
  padding: 7px 18px;
  border-radius: 999px;
  background: #f1f1ef;
  color: #4b5058;
  font-size: 14px;
}

.caption {
  margin: 60px 0 0;
  color: #7d828a;
  text-align: center;
  font-size: 15px;
}

.cases,
.faq-section {
  background: var(--cream);
}

.case-grid article {
  border: 1px solid var(--line);
  background: #fff;
}

.case-grid h4 {
  min-height: 86px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  font-size: clamp(22px, 2vw, 28px);
}

.case-category {
  margin-top: 78px;
}

.case-category + .case-category {
  margin-top: 110px;
  padding-top: 82px;
  border-top: 1px solid var(--line);
}

.case-category-title {
  margin: 0;
  color: var(--ink);
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.35;
  text-align: center;
}

.case-category-title span {
  display: block;
  margin-bottom: 10px;
  color: #858992;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.24em;
}

.case-category .case-grid {
  margin-top: 42px;
}

.case-grid > article > img.case-product-image {
  padding: 18px;
  background: #fff;
  object-fit: contain;
}

.case-grid > article > img.case-background-image {
  object-fit: cover;
}

.case-grid > article > img.case-background-image-skierg {
  object-position: center 35%;
}

.price {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  margin-top: 22px;
  margin-bottom: 26px;
}

.price img {
  width: 66px;
}

.discount-rate {
  display: grid;
  width: 66px;
  aspect-ratio: 1;
  place-content: center;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--ink);
  line-height: 1;
  text-align: center;
}

.discount-rate > span {
  font-size: 18px;
  font-weight: 950;
}

.discount-rate small {
  margin-top: 3px;
  font-size: 10px;
  font-weight: 950;
}

.price p {
  display: grid;
  gap: 4px;
  margin: 0;
  color: #6b7078;
  font-size: 13px;
  line-height: 1.45;
}

.price-row {
  display: flex;
  align-items: baseline;
  justify-content: flex-start;
  gap: 8px;
  white-space: nowrap;
}

.price-note {
  display: block;
  width: max-content;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--yellow);
  color: var(--ink);
  font-size: 11px;
  font-weight: 900;
  line-height: 1.4;
}

.price-label {
  flex: 0 0 auto;
}

.price b {
  flex: 0 0 auto;
  color: #d7a80d;
  font-size: 12px;
  font-weight: 900;
}

.price s {
  flex: 0 1 auto;
  color: var(--ink);
  font-size: clamp(17px, 1.5vw, 23px);
  text-decoration-thickness: 2px;
}

.price strong {
  flex: 0 1 auto;
  color: var(--ink);
  font-size: clamp(19px, 1.75vw, 26px);
  line-height: 1.1;
}

.price-currency,
.price-unit,
.price-tax {
  display: inline-block;
  font-weight: 900;
  white-space: nowrap;
}

.price-currency,
.price-unit {
  font-size: 0.58em;
  vertical-align: 0.16em;
}

.price-tax {
  margin-left: 4px;
  font-size: 0.42em;
  vertical-align: 0.18em;
}

.flow {
  background: #fff;
}

.flow-list {
  display: grid;
  margin: 76px 0 0;
  padding: 0;
  grid-template-columns: repeat(5, 1fr);
  gap: 28px;
  list-style: none;
}

.flow-list img {
  width: 100%;
  aspect-ratio: 1.5 / 1;
  object-fit: cover;
}

.flow-list h3 {
  margin-top: 28px;
}

.flow-list p {
  margin: 0;
  font-size: 15px;
}

.faq-section {
  padding: 118px 0;
}

.faq-list {
  margin-top: 54px;
}

.faq-list details {
  border-top: 1px solid #cfcfc9;
  background: transparent;
}

.faq-list details:last-child {
  border-bottom: 1px solid #cfcfc9;
}

.faq-list summary {
  position: relative;
  padding: 28px 70px 28px 18px;
  cursor: pointer;
  color: var(--ink);
  font-size: clamp(18px, 2vw, 24px);
  list-style: none;
}

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

.faq-list summary::before {
  margin-right: 18px;
  content: "Q";
}

.faq-list summary::after {
  position: absolute;
  right: 24px;
  content: "+";
  font-size: 34px;
  line-height: 1;
}

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

.faq-list p {
  margin: 0;
  padding: 0 70px 28px 52px;
  color: #5b6068;
}

.contact {
  padding: 118px 22px;
  background: #0f1116;
  color: #fff;
}

.contact-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.contact h2 {
  color: #fff;
}

.contact > .contact-inner > p:not(.section-label) {
  margin: 26px 0 48px;
  font-size: clamp(17px, 1.7vw, 22px);
}

.contact-columns {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 54px;
  align-items: start;
}

.contact ul {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact li::before {
  margin-right: 10px;
  color: var(--yellow);
  content: "―";
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 28px;
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
}

.contact-form label {
  display: grid;
  gap: 8px;
  font-size: 14px;
}

input,
textarea {
  width: 100%;
  border: 1px solid #d6d7dc;
  border-radius: 8px;
  padding: 12px 14px;
  font: inherit;
  font-weight: 600;
}

.contact-form button,
.line-submit {
  display: inline-flex;
  min-height: 58px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 900;
  text-align: center;
}

.site-footer {
  display: grid;
  gap: 24px;
  padding: 48px clamp(22px, 6vw, 98px);
  background: #fff;
  border-top: 1px solid var(--line);
}

.site-footer .brand {
  width: 176px;
  height: auto;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  color: #4c5159;
  font-size: 14px;
}

.site-footer p {
  margin: 0;
  color: #777c84;
  font-size: 13px;
}

.legal-page {
  background: #fff;
}

.legal-main {
  width: min(900px, calc(100% - 44px));
  margin: 0 auto;
  padding: clamp(64px, 9vw, 110px) 0;
}

.legal-main h1 {
  margin: 0 0 28px;
  color: var(--ink);
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.35;
}

.legal-main h2 {
  margin: 40px 0 12px;
  color: var(--ink);
  font-size: clamp(22px, 2.7vw, 30px);
}

.legal-main p,
.legal-main li {
  color: #4f555e;
  font-size: 16px;
}

.legal-main ul {
  padding-left: 1.3em;
}

.thanks-main {
  display: grid;
  width: min(760px, calc(100% - 44px));
  min-height: calc(100vh - 86px);
  align-content: center;
  justify-items: center;
  margin: 0 auto;
  padding: 84px 0 120px;
  text-align: center;
}

.thanks-main h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(36px, 5.5vw, 68px);
  font-weight: 900;
  line-height: 1.28;
}

.thanks-main > p:not(.section-label) {
  margin: 26px 0 24px;
  color: #555a63;
  font-size: clamp(16px, 1.7vw, 21px);
}

.thanks-notice {
  display: grid;
  width: min(620px, 100%);
  gap: 6px;
  margin: 0 0 32px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--yellow);
  border-radius: 8px;
  background: var(--cream);
  text-align: left;
}

.thanks-notice strong {
  color: var(--ink);
  font-size: 16px;
}

.thanks-notice p {
  margin: 0;
  color: #555a63;
  font-size: 15px;
  line-height: 1.75;
}

.thanks-actions {
  display: grid;
  width: min(620px, 100%);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

@media (max-width: 1080px) {
  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    display: none;
    padding: 18px 22px 26px;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    box-shadow: var(--shadow);
  }

  .site-header.is-open .site-nav {
    display: flex;
  }

  .nav-toggle {
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    border: 0;
    border-radius: 50%;
    background: var(--ink);
  }

  .nav-toggle span {
    width: 22px;
    height: 2px;
    background: #fff;
  }

  .hero,
  .why-card,
  .contact-columns {
    grid-template-columns: 1fr;
  }

  .hero-photo {
    min-height: 420px;
  }

  .hero-actions {
    position: fixed;
    width: min(820px, calc(100% - 28px));
    margin: 0;
    transform: translateX(50%);
  }

  .problem {
    padding-top: 170px;
  }

  .problem-grid,
  .reason-grid,
  .case-grid,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .flow-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: 82px;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .lineup {
    scroll-margin-top: 82px;
  }

  .brand {
    width: 112px;
    height: auto;
  }

  .hero-copy {
    order: 0;
    padding-top: 42px;
  }

  .hero-photo {
    order: -1;
    min-height: 360px;
  }

  .alert {
    width: 100%;
    min-height: 58px;
    padding-right: 10px;
    font-size: 13px;
  }

  .alert span {
    width: 72px;
    min-height: 58px;
    margin-right: 8px;
    padding-right: 14px;
    font-size: 22px;
  }

  .proofs,
  .flow-list {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    bottom: 10px;
    width: calc(100% - 20px);
    grid-template-columns: 1fr;
    gap: 0;
  }

  .hero-actions .button-muted {
    display: none;
  }

  .hero-actions .button {
    min-height: 50px;
    padding-top: 8px;
    padding-bottom: 8px;
    font-weight: 780;
  }

  .button {
    min-height: 54px;
    padding: 9px 8px;
    font-size: 15px;
  }

  .section-heading h2,
  .contact h2 {
    font-size: 30px;
    line-height: 1.32;
  }

  .sp-break {
    display: block;
  }

  .problem {
    padding: 92px 18px 88px;
    background:
      linear-gradient(180deg, rgba(20, 23, 29, 0.74), rgba(20, 23, 29, 0.92)),
      #272727;
  }

  .problem::before {
    opacity: 0.36;
    filter: saturate(0.85) contrast(1.08);
    background-position: center top;
  }

  .problem .section-heading {
    width: min(100%, 360px);
    margin: 0 auto;
  }

  .problem .section-heading > span {
    gap: 8px;
    min-width: 0;
    margin-bottom: 18px;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
    color: var(--yellow);
  }

  .problem .section-heading > span::before {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--yellow);
    box-shadow: 0 0 14px rgba(255, 230, 0, 0.72);
    content: "";
  }

  .problem .section-heading h2 {
    position: relative;
    font-size: 31px;
    line-height: 1.42;
    text-shadow: 0 3px 22px rgba(0, 0, 0, 0.45);
  }

  .problem .section-heading h2::after {
    display: block;
    width: 82px;
    height: 4px;
    margin: 18px auto 0;
    border-radius: 999px;
    background: var(--yellow);
    box-shadow: 0 0 18px rgba(255, 230, 0, 0.52);
    content: "";
  }

  .problem-title-main {
    display: inline-block;
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.74em;
    letter-spacing: 0.08em;
  }

  .problem-title-accent {
    position: relative;
    display: inline-block;
    margin: 5px 0 4px;
    padding: 0.02em 0.38em 0.09em;
    border: 1px solid rgba(255, 230, 0, 0.78);
    border-radius: 8px;
    background: linear-gradient(135deg, var(--yellow) 0 82%, #fff58c 82% 100%);
    box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.42);
    color: var(--ink);
    font-size: 1.1em;
    line-height: 1.2;
    text-shadow: none;
  }

  .problem-grid {
    margin: 38px auto 42px;
    gap: 14px;
  }

  .problem-grid article {
    position: relative;
    min-height: 0;
    padding: 22px 20px 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(10px);
  }

  .problem-grid article::after {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(255, 230, 0, 0.18), transparent 36%);
    content: "";
    pointer-events: none;
  }

  .problem-grid article::before {
    display: inline-flex;
    width: 28px;
    height: 28px;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    border-radius: 50%;
    background: var(--yellow);
    color: var(--ink);
    content: "!";
    font-size: 17px;
    font-weight: 950;
    line-height: 1;
  }

  .problem-grid article > * {
    position: relative;
    z-index: 1;
  }

  .problem-grid h3 {
    margin-bottom: 12px;
    font-size: 21px;
    line-height: 1.4;
  }

  .problem-grid p {
    color: rgba(255, 255, 255, 0.82);
    font-size: 14px;
    line-height: 1.85;
  }

  .dark-section,
  .reasons,
  .structure,
  .lineup,
  .cases,
  .flow,
  .faq-section,
  .contact {
    padding-top: 82px;
    padding-bottom: 82px;
  }

  .problem {
    padding-top: 92px;
    padding-bottom: 88px;
  }

  .policy {
    padding-top: 82px;
  }

  .policy-box {
    padding: 34px 18px;
    border-width: 18px;
  }

  .policy-title {
    left: auto;
    width: 100%;
    max-width: 100%;
    margin: -78px auto 52px;
    padding: 22px 12px;
    font-size: 21px;
    transform: none;
  }

  .policy-title-main {
    white-space: normal;
  }

  .policy-title mark {
    white-space: nowrap;
  }

  .button-black {
    min-width: 0;
    width: 100%;
    font-size: 16px;
  }

  .button-black small {
    margin-top: -22px;
    padding: 4px 18px;
    font-size: 12px;
  }

  .section-heading > span,
  .section-label,
  .policy-kicker {
    margin-bottom: 20px;
  }

  .reasons {
    background: #fff;
  }

  .reasons .section-heading {
    width: min(100%, 360px);
    margin: 0 auto;
  }

  .reasons .section-heading > span {
    margin-bottom: 20px;
  }

  .reasons .section-heading h2 {
    display: block;
    width: auto;
    padding: 0;
    background: none;
    font-size: 28px;
    font-weight: 850;
    line-height: 1.32;
    text-shadow: none;
  }

  .reason-grid {
    margin-top: 46px;
  }

  .price {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 12px;
  }

  .price img {
    width: 48px;
  }

  .discount-rate {
    width: 48px;
  }

  .discount-rate > span {
    font-size: 13px;
  }

  .discount-rate small {
    font-size: 8px;
  }

  .price p {
    min-width: 0;
    gap: 8px;
  }

  .price-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1px;
    white-space: normal;
  }

  .price-label,
  .price b {
    font-size: 10px;
    line-height: 1.3;
  }

  .price s {
    font-size: 16px;
    line-height: 1.2;
    white-space: nowrap;
  }

  .price strong {
    font-size: 18px;
    white-space: nowrap;
  }

  .faq-list summary {
    padding-left: 0;
  }

  .thanks-actions {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-slide {
    transform: none;
    transition: opacity 0.2s ease;
  }

  .hero-slide.is-active {
    animation: none;
  }
}