/* ============================================================
   Variables & Reset
   ============================================================ */
:root {
  --color-primary:  #002b5c;
  --color-accent:   #004080;
  --color-bg:       #ffffff;
  --color-text:     #374151;
  --color-text-light: #ffffff;
  --color-border:   #e5e7eb;
  --color-bg-gray:  #f4f6f9;
  --color-accent-btn: #004080;
  --color-accent-btn-hover: #003366;

  --font-base: 'Noto Sans JP', sans-serif;
  --transition: 0.3s ease;
  --radius: 4px;
  --radius-lg: 8px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.14);

  --container-max: 1160px;
  --container-pad: 24px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================================
   Utilities
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-heading {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: #111827;
}

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

.section-sub {
  margin-top: 20px;
  font-size: 1rem;
  color: #6B7280;
  line-height: 1.8;
}

.section-sub--light {
  color: rgba(255, 255, 255, 0.75);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.875rem;
  transition: background var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-accent);
}

.btn--accent {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 43, 92, 0.3);
}

.btn--accent:hover {
  background: var(--color-accent-btn-hover);
  box-shadow: 0 4px 16px rgba(0, 43, 92, 0.4);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 1rem;
  border-radius: var(--radius);
}

/* ============================================================
   Fade-in animation
   ============================================================ */
.js-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.js-fade.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Header
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.header.is-scrolled {
  box-shadow: var(--shadow);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 60px;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.header__logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.header__nav {
  display: none;
  gap: 24px;
  margin-left: auto;
}

.header__nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: #6B7280;
  transition: color var(--transition);
}

.header__nav-link:hover {
  color: var(--color-primary);
}

.header__cta {
  display: none;
  flex-shrink: 0;
  font-size: 0.8rem;
  padding: 8px 16px;
}

.header__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  margin-left: auto;
  padding: 4px;
}

.header__hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.header__hamburger[aria-expanded="true"] .header__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.header__hamburger[aria-expanded="true"] .header__hamburger-line:nth-child(2) {
  opacity: 0;
}
.header__hamburger[aria-expanded="true"] .header__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.header__nav.is-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 20px var(--container-pad);
  gap: 16px;
  box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
  .header__hamburger { display: none; }
  .header__nav { display: flex; margin-left: auto; }
  .header__cta { display: inline-flex; }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  background: var(--color-bg-gray);
  padding-top: 96px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--color-border);
}

.hero__inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.hero__heading {
  font-size: clamp(1.75rem, 5vw, 2.875rem);
  font-weight: 700;
  line-height: 1.35;
  color: #111827;
  letter-spacing: -0.02em;
}

.hero__heading--accent {
  color: #6B7280;
  display: block;
  margin-top: 8px;
  font-size: clamp(1.25rem, 3.5vw, 2rem);
}

.hero__sub {
  margin-top: 20px;
  font-size: 0.95rem;
  color: #374151;
  line-height: 1.9;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.hero__badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text);
}

.hero__cta {
  margin-top: 28px;
  align-self: flex-start;
}

.hero__visual {
  display: none;
}

.hero__img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .hero__inner {
    flex-direction: row;
    align-items: center;
    gap: 56px;
  }
  .hero__content { flex: 1; }
  .hero__visual {
    display: block;
    flex: 0 0 45%;
  }
}

/* ============================================================
   Problem
   ============================================================ */
.problem {
  padding: 80px 0;
  background: var(--color-bg-gray);
  border-bottom: 1px solid var(--color-border);
}

.problem__grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.problem__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.problem__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.problem__icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.problem__text {
  font-size: 0.9rem;
  font-weight: 700;
  color: #111827;
}

.problem__image img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .problem__grid {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }
  .problem__list { flex: 1; }
  .problem__image { flex: 0 0 45%; }
  .problem__image img { height: 340px; }
}

/* ============================================================
   Gap
   ============================================================ */
.gap {
  padding: 80px 0;
  background: var(--color-primary);
}

.gap__inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.gap__content { flex: 1; }

.gap__heading {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.45;
  color: #fff;
}

.gap__heading--accent {
  color: #93C5FD;
}

.gap__body {
  margin-top: 16px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.9;
}

.gap__highlight {
  margin-top: 16px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  border-left: 4px solid rgba(255, 255, 255, 0.4);
  padding-left: 16px;
}

.gap__image img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  opacity: 0.85;
  box-shadow: var(--shadow-lg);
}

@media (min-width: 1200px) {
  .gap__inner {
    flex-direction: row;
    align-items: center;
    gap: 64px;
  }
  .gap__image { flex: 0 0 42%; }
  .gap__image img { height: 300px; }
}

/* ============================================================
   Solution
   ============================================================ */
.solution {
  padding: 80px 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}

.solution__list {
  display: grid;
  gap: 20px;
  margin-bottom: 56px;
}

.solution__item {
  padding: 32px;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

.solution__item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.solution__item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--color-primary);
  border-radius: var(--radius);
  color: #fff;
}

.solution__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.solution__body {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.8;
  text-align: left;
}

@media (min-width: 768px) {
  .solution__list { grid-template-columns: repeat(3, 1fr); }
}


/* ============================================================
   Install
   ============================================================ */
.install {
  padding: 80px 0;
  background: var(--color-bg-gray);
  border-bottom: 1px solid var(--color-border);
}

.install__inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.install__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.install__body {
  margin-top: 20px;
  font-size: 0.95rem;
  color: #6B7280;
  line-height: 1.9;
}

.install__features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.install__feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #374151;
}

.install__feature-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  border-radius: 50%;
  color: #fff;
  margin-top: 1px;
}

.install__image img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .install__inner {
    flex-direction: row;
    align-items: center;
    gap: 56px;
  }
  .install__content { flex: 1; }
  .install__image {
    flex: 0 0 44%;
    order: 2;
  }
  .install__content { order: 1; }
  .install__image img { height: 340px; }
}

/* ============================================================
   Steps
   ============================================================ */
.steps {
  padding: 80px 0;
  background: #fff;
}

.steps__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.steps__card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.steps__number {
  font-size: 2rem;
  font-weight: 700;
  color: #D1D5DB;
  line-height: 1;
}

.steps__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.steps__body {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.8;
}

.steps__image img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .steps__card {
    flex-direction: row;
    align-items: center;
  }
  .steps__number {
    flex: 0 0 80px;
    text-align: center;
    border-right: 1px solid var(--color-border);
    padding-right: 16px;
  }
  .steps__content { flex: 1; }
  .steps__image { flex: 0 0 180px; }
  .steps__image img { height: 120px; }
}

/* ============================================================
   Benefits
   ============================================================ */
.benefits {
  padding: 80px 0;
  background: var(--color-primary);
}

.benefits__inner {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.benefits__list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 28px;
}

.benefits__item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
}

.benefits__check {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  font-size: 0.75rem;
  color: #fff;
  font-weight: 900;
}

.benefits__image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  opacity: 0.85;
}

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

.benefits__stat {
  padding: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  text-align: center;
}

.benefits__stat-value {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.benefits__stat-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.55);
}

@media (min-width: 768px) {
  .benefits__inner {
    flex-direction: row;
    align-items: center;
    gap: 64px;
  }
  .benefits__content { flex: 1; }
  .benefits__visual { flex: 0 0 44%; }
  .benefits__image { height: 280px; }
}

/* ============================================================
   Comparison
   ============================================================ */
.comparison {
  padding: 80px 0;
  background: var(--color-bg-gray);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.comparison__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

.comparison__table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  background: #fff;
}

.comparison__th {
  padding: 14px 20px;
  font-size: 0.8rem;
  font-weight: 700;
  text-align: left;
}

.comparison__th--label {
  background: var(--color-bg-gray);
  color: #6B7280;
}

.comparison__th--general {
  background: var(--color-bg-gray);
  color: #6B7280;
  text-align: center;
}

.comparison__th--cosnex {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
}

.comparison__row-label {
  padding: 16px 20px;
  font-size: 0.875rem;
  font-weight: 700;
  background: var(--color-bg-gray);
  border-top: 1px solid var(--color-border);
  text-align: left;
}

.comparison__cell {
  padding: 16px 20px;
  font-size: 0.875rem;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.comparison__cell--general {
  background: #fff;
  color: #9CA3AF;
}

.comparison__cell--cosnex {
  background: #EFF6FF;
  color: var(--color-primary);
  font-weight: 700;
}

/* ============================================================
   Security
   ============================================================ */
.security {
  padding: 80px 0;
  background: var(--color-primary);
}

.security__inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.security__image img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  opacity: 0.85;
  box-shadow: var(--shadow-lg);
}

.security__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.security__tag {
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
}

@media (min-width: 1200px) {
  .security__inner {
    flex-direction: row;
    align-items: center;
    gap: 64px;
  }
  .security__image { flex: 0 0 42%; }
  .security__image img { height: 300px; }
  .security__content { flex: 1; }
}

/* ============================================================
   Pricing
   ============================================================ */
.price {
  padding: 80px 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}

.price__list {
  display: grid;
  gap: 20px;
  margin-bottom: 24px;
}

.price__item {
  padding: 32px;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  text-align: center;
}

.price__item--featured {
  background: #fff;
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: scaleY(1.02);
}

.price__step-badge {
  display: inline-block;
  padding: 3px 12px;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #6B7280;
  margin-bottom: 12px;
}

.price__step-badge--featured {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.price__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.price__body {
  font-size: 0.8rem;
  color: #6B7280;
  line-height: 1.8;
}

.price__note {
  font-size: 0.8rem;
  color: #9CA3AF;
  text-align: center;
}

@media (min-width: 768px) {
  .price__list { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   FAQ
   ============================================================ */
.faq {
  padding: 80px 0;
  background: var(--color-bg-gray);
  border-bottom: 1px solid var(--color-border);
}

.faq__list {
  max-width: 760px;
  margin-inline: auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 0;
  font-size: 0.9rem;
  font-weight: 700;
  color: #111827;
  text-align: left;
  transition: color var(--transition);
}

.faq__trigger:hover { color: var(--color-primary); }

.faq__icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  position: relative;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.faq__icon::before,
.faq__icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transform: translate(-50%, -50%);
  transition: transform var(--transition);
}

.faq__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq__trigger[aria-expanded="true"] .faq__icon {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.faq__trigger[aria-expanded="true"] .faq__icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq__answer {
  padding: 0 0 20px;
}

.faq__answer p {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.8;
}

/* ============================================================
   Contact (Final CTA)
   ============================================================ */
.contact {
  padding: 80px 0;
  background: var(--color-primary);
}

.contact__inner {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.contact__heading {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.35;
  color: #fff;
  margin-bottom: 16px;
}

.contact__body {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.9;
}

.contact__image {
  width: 100%;
  max-width: 420px;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  opacity: 0.75;
  margin-top: 24px;
  display: none;
}

.contact__form-wrap {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 8px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.contact__iframe {
  display: block;
  width: 100%;
  height: 1300px;
  border: none;
  border-radius: var(--radius);
  background: #fff;
}

@media (min-width: 768px) {
  .contact__inner {
    flex-direction: row;
    align-items: flex-start;
    gap: 56px;
  }
  .contact__content {
    flex: 1;
    padding-top: 16px;
  }
  .contact__image { display: block; }
  .contact__form-wrap { flex: 0 0 50%; }
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  padding: 32px 0;
  background: var(--color-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.footer__logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.7);
}

.footer__copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.3);
}

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}