:root {
  --ink: #101820;
  --muted: #667386;
  --line: #d9e1ea;
  --paper: #f4f7fb;
  --white: #ffffff;
  --navy: #152a45;
  --blue: #1769ff;
  --cyan: #00a7d8;
  --amber: #d68a18;
  --panel: #eaf0f7;
  --shadow: 0 28px 80px rgba(16, 24, 32, 0.14);
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.7;
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  color: var(--white);
  background: rgba(16, 24, 32, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 82px;
  height: 40px;
  place-items: center;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  border-radius: var(--radius);
  font-family: Inter, sans-serif;
  font-size: 12px;
  font-weight: 900;
  text-transform: lowercase;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
  line-height: 1.1;
}

.brand small {
  color: #b9c8d8;
  font-family: Inter, sans-serif;
  font-size: 11px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: end;
  gap: 22px;
  color: #d9e8f8;
  font-size: 13px;
  font-weight: 800;
}

.site-nav a {
  padding: 8px 0;
}

.nav-cta {
  padding: 10px 16px !important;
  color: var(--white);
  background: var(--blue);
  border-radius: var(--radius);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: end;
  padding: 112px clamp(18px, 5vw, 72px) 46px;
  overflow: hidden;
  background: #101820;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(16, 24, 32, 0.96) 0%, rgba(16, 24, 32, 0.72) 42%, rgba(16, 24, 32, 0.16) 100%),
    linear-gradient(180deg, rgba(16, 24, 32, 0.28), rgba(16, 24, 32, 0.8));
}

.hero-panel {
  position: relative;
  z-index: 2;
  max-width: 720px;
  color: var(--white);
}

.hero-media {
  position: absolute;
  inset: 0;
}

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

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-family: Inter, sans-serif;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(44px, 6vw, 86px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4.3vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 19px;
  line-height: 1.35;
}

.lead {
  max-width: 660px;
  color: #dce8f6;
  font-size: clamp(16px, 1.5vw, 20px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 900;
  cursor: pointer;
}

.button.primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 18px 34px rgba(23, 105, 255, 0.28);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.28);
}

.quick-nav {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.quick-nav a {
  display: grid;
  gap: 4px;
  min-height: 132px;
  padding: 22px;
  border-right: 1px solid var(--line);
}

.quick-nav a:hover {
  background: #eef5ff;
}

.quick-nav span {
  color: var(--blue);
  font-family: Inter, sans-serif;
  font-size: 12px;
  font-weight: 900;
}

.quick-nav strong {
  font-size: 17px;
}

.quick-nav small {
  color: var(--muted);
  font-size: 12px;
}

.section {
  padding: clamp(72px, 9vw, 124px) clamp(18px, 5vw, 72px);
}

.section-heading {
  max-width: 860px;
  margin-bottom: 34px;
}

.section-heading.compact {
  max-width: 760px;
}

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

.quality-layout {
  display: grid;
  grid-template-columns: minmax(420px, 1.15fr) minmax(360px, 0.85fr);
  gap: 22px;
  align-items: stretch;
}

.quality-layout > img {
  width: 100%;
  height: 100%;
  min-height: 520px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.quality-steps {
  display: grid;
  gap: 12px;
}

.quality-steps article,
.solution-grid article,
.rule-list article,
details,
.company-grid div,
.contact-form {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.quality-steps article {
  padding: 26px;
}

.quality-steps span,
.solution-grid span {
  display: inline-flex;
  margin-bottom: 22px;
  color: var(--blue);
  font-family: Inter, sans-serif;
  font-weight: 900;
}

.solutions {
  background: #e9eef5;
}

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

.solution-grid article {
  min-height: 260px;
  padding: 26px;
}

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

.row {
  display: flex;
  max-width: none;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.text-link {
  display: inline-flex;
  color: var(--blue);
  font-weight: 900;
  border-bottom: 2px solid currentColor;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.support-grid a {
  display: grid;
  gap: 12px;
  min-height: 112px;
  padding: 18px;
  color: var(--ink);
  background: #f7faff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 900;
}

.support-grid a::after {
  content: "→";
  justify-self: end;
  color: var(--blue);
  font-family: Inter, sans-serif;
}

.support-grid span {
  color: var(--muted);
  font-size: 12px;
}

.advice {
  display: grid;
  grid-template-columns: minmax(300px, 0.8fr) minmax(420px, 1.2fr);
  gap: clamp(24px, 6vw, 90px);
  color: var(--white);
  background: linear-gradient(135deg, #101820, #1b3a5d 66%, #1769ff);
}

.advice .eyebrow,
.advice p {
  color: #d9e8f8;
}

.advice-body {
  max-width: 760px;
}

.advice-body .button {
  margin-top: 12px;
}

.warranty {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(420px, 1.1fr);
  gap: 16px;
}

.warranty-card {
  padding: clamp(28px, 5vw, 54px);
  color: var(--white);
  background: #101820;
  border-radius: var(--radius);
}

.warranty-card p {
  color: #d9e8f8;
}

.rule-list {
  display: grid;
  gap: 12px;
}

.rule-list article {
  padding: 24px;
}

.recycle {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  background: #eef3f9;
}

.recycle .button.secondary {
  color: var(--blue);
  background: var(--white);
  border-color: var(--line);
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

details {
  padding: 22px 24px;
}

summary {
  color: var(--ink);
  font-weight: 900;
  cursor: pointer;
}

details p {
  margin: 14px 0 0;
}

.company {
  display: grid;
  grid-template-columns: minmax(280px, 0.55fr) minmax(720px, 1.45fr);
  gap: clamp(24px, 5vw, 72px);
  background: var(--white);
}

.company-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.company-grid div {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 16px;
  align-items: center;
  padding: 17px 18px;
  background: #f7faff;
}

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

.company-grid strong {
  font-size: 15px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(320px, 0.8fr) minmax(480px, 1.2fr);
  gap: clamp(28px, 5vw, 72px);
  color: var(--white);
  background: #101820;
}

.contact p {
  color: #d9e8f8;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: clamp(22px, 4vw, 34px);
  color: var(--ink);
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: #314254;
  font-size: 13px;
  font-weight: 900;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 46px;
  padding: 12px 13px;
  color: var(--ink);
  background: #f7faff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

.order-field[hidden],
[data-quantity-field][hidden],
.hidden {
  display: none;
}

.order-field span {
  color: var(--muted);
  font-size: 12px;
}

.form-status {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 900;
  line-height: 1.7;
}

.form-status.is-success {
  color: #0d3b2f;
  background: #e7f6ef;
  border: 1px solid #b7dacd;
}

.form-status.is-error {
  color: #641f1f;
  background: #fff0ed;
  border: 1px solid #efc0b8;
}

.full {
  grid-column: 1 / -1;
}

.site-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 28px clamp(18px, 5vw, 72px);
  color: #c8d6e7;
  background: #0b1118;
}

.site-footer strong {
  color: var(--white);
  font-family: Inter, sans-serif;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--white);
  font-weight: 900;
}

.support-page {
  min-height: 100vh;
  padding: clamp(28px, 5vw, 72px);
  background: var(--paper);
}

.breadcrumb {
  display: inline-flex;
  margin-bottom: 34px;
  color: var(--blue);
  font-weight: 900;
}

.support-hero {
  max-width: 980px;
  margin-bottom: 36px;
}

.support-hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.02;
}

.support-hero p {
  max-width: 780px;
  color: var(--muted);
  font-size: 18px;
}

.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 380px);
  gap: 16px;
  max-width: 1180px;
}

.support-article,
.support-aside {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.support-article {
  padding: clamp(26px, 4vw, 44px);
}

.support-article h2,
.support-aside h2 {
  font-size: 22px;
}

.support-article h2:not(:first-child) {
  margin-top: 34px;
}

.support-article p,
.support-article li,
.support-aside p {
  color: var(--muted);
}

.support-article ol {
  margin: 0;
  padding-left: 1.35em;
}

.support-article li + li {
  margin-top: 10px;
}

.support-aside {
  position: sticky;
  top: 94px;
  padding: 26px;
}

.support-aside .button {
  width: 100%;
  margin-top: 12px;
}

@media (max-width: 1120px) {
  .quick-nav,
  .solution-grid,
  .support-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .quality-layout,
  .advice,
  .warranty,
  .company,
  .contact,
  .support-layout {
    grid-template-columns: 1fr;
  }

  .quality-layout > img {
    min-height: 380px;
  }

  .support-aside {
    position: static;
  }
}

@media (max-width: 820px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav-toggle {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
  }

  .nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--white);
  }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    background: #101820;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 12px;
  }

  .nav-cta {
    text-align: center;
  }

  .row,
  .recycle {
    display: block;
  }

  .faq-list,
  .company-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .brand small {
    display: none;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 30px;
  }

  .hero {
    min-height: 88vh;
    padding-top: 96px;
  }

  .hero-actions,
  .button,
  .quick-nav,
  .solution-grid,
  .support-grid,
  .contact-form,
  .company-grid div {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .quick-nav a {
    min-height: 96px;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }
}