/* ========================================
   Base / Global
======================================== */
:root {
  --color-primary: #4cd137;
  --color-secondary: #44bd32;
  --color-accent: #ff8a00;
  --color-text: #222222;
  --color-muted: #666666;
  --color-bg: #f5f7fa;
  --color-border: #dde3ec;
  --color-header-bg: #ffffff;
  --color-footer-bg: #020041;
  --shadow-soft: 0 2px 4px rgba(15, 30, 60, 0.06);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --container-max: 1200px;
}

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

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

body {
  margin: 0;
  font-family: "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--color-text);
  background-color: #ffffff;
  line-height: 1.7;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast),
    border-color var(--transition-fast);
}

a:hover {
  color: var(--color-secondary);
}

ul,
ol {
  margin: 0;
  padding-left: 1.4rem;
}

p {
  margin: 0 0 0.75rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.5rem;
  font-weight: 700;
  line-height: 1.4;
  color: #4c535b;
}

/* Utility */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 16px;
}

.section {
  padding: 64px 0;
  background-color: #ffffff;
}

.section:nth-of-type(odd) {
  background-color: var(--color-bg);
}

.section-inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

.section-title {
  font-size: 1.9rem;
  margin-bottom: 0.75rem;
}

.section-title span {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-secondary);
  letter-spacing: 0.12em;
  /* text-transform: uppercase; */
  margin-bottom: 1.25rem;
  font-family: "Quicksand", sans-serif;
}

.section-intro,
.lead-text {
  color: var(--color-muted);
  font-size: 0.98rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), opacity var(--transition-fast);
}

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

.btn-primary:hover {
  background-color: #339923;
  border-color: #339923;
  color: #fff;
}

.btn-outline {
  background-color: #ffffff;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

.br-sp {
  display: none;
}

/* ========================================
   Header & Global Navigation
======================================== */
.global-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-header-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 16px;
}

.header-tel {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  margin-right: 8px;
  font-size: 0.6rem;
  color: var(--color-muted);
}

.header-tel-label {
  line-height: 1.4;
}

.header-tel-number {
  font-size: 1.27rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.site-brand {
  flex-shrink: 0;
}

.site-brand-link {
  display: inline-flex;
  align-items: center;
}

.site-logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

/* Global Nav */
.global-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--color-muted);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Nav Toggle (Mobile) */
.nav-toggle {
  display: none;
  width: 40px;
  height: 32px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  background-color: #ffffff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 0;
}

.nav-toggle-bar {
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
  display: block;
}

/* ========================================
   Product Dropdown
======================================== */
.product-dropdown-wrapper {
  border-top: 1px solid var(--color-border);
  background-color: #f9fbff;
}

.product-dropdown-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 8px 0 10px;
}

.product-dropdown {
  position: relative;
}

.product-dropdown-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.product-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background-color: #ffffff;
  color: var(--color-text);
  font-size: 0.88rem;
  cursor: pointer;
}

.product-dropdown-toggle:hover {
  border-color: var(--color-primary);
}

.product-dropdown-icon {
  font-size: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 10px;
  height: 10px;
  position: relative;
}

.product-dropdown-icon::before {
  content: "";
  display: block;
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--color-text);
  border-bottom: 2px solid var(--color-text);
  transform: rotate(45deg); 
  transition: transform var(--transition-fast);
}

.product-dropdown-menu {
  position: absolute;
  left: 0;
  min-width: 475px;
  max-width: 475px;
  list-style: none;
  margin: 0;
  padding: 8px 0;
  background-color: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-normal),
    transform var(--transition-normal),
    visibility var(--transition-normal);
  z-index: 40;
}

.product-dropdown-menu--open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.product-link {
  display: block;
  padding: 8px 16px;
  font-size: 0.9rem;
  color: var(--color-text);
}

.product-link:hover {
  background-color: var(--color-bg);
  color: var(--color-primary);
}

/* ========================================
   Hero
======================================== */

.hero {
  position: relative;
  color: #ffffff;
  padding: 96px 0 80px;
  background-image:
    linear-gradient(135deg, rgba(0, 29, 77, 0.90), hsla(206, 100%, 35%, 0.9)),
    url(../img/img_hero.png); 
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-blend-mode: multiply;
}

.hero-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.hero-content {
  max-width: 560px;
}

.hero-kicker {
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.9;
  margin-bottom: 0.75rem;
}

.hero-title {
  font-size: 2.4rem;
  margin-bottom: 0.75rem;
  color: #fff;
}

.hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.8;
}

.hero-image-placeholder {
  flex: 0 0 320px;
  min-height: 200px;
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.9rem;
  padding: 16px;
  color: #e5f2ff;
}

/* ========================================
   Solution Switch Tabs
======================================== */
.solution-switch {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.solution-switch-inner {
  display: flex;
  gap: 24px;
  padding: 12px 16px;
  overflow-x: auto;
}

.solution-tab {
  flex: 0 0 auto;
  padding: 8px 0;
  font-size: 0.9rem;
  border: none;
  border-radius: 0;
  background: none;
  color: var(--color-muted);
  cursor: pointer;
  position: relative;
}

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

.solution-tab--active {
  color: var(--color-primary);
  font-weight: 700;
  cursor: default;
}

.solution-tab--active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 3px;
  border-radius: 999px;
  background-color: var(--color-primary);
}

.solution-tab--active:hover {
  color: var(--color-primary);
}

/* ========================================
   Overview Section
======================================== */
.overview-section {
  background-color: var(--color-bg);
}

.overview-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 1fr);
  gap: 40px;
  align-items: center;
}

.overview-text .lead-text {
  margin-top: 0.75rem;
  font-size: 1rem;
}

.device-image-placeholder {
  min-height: 220px;
  /* border-radius: var(--radius-lg);
  border: 1px dashed var(--color-border);
  background-color: #ffffff; */
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-muted);
  padding: 16px;
}

/* ========================================
   Feature Section
======================================== */
.feature-section {
  background-color: #ffffff;
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.feature-card {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 20px 18px 18px;
}

.feature-image-placeholder {
  width: 100%;
  height: auto;
  margin-bottom: 12px;
}

.feature-title {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--color-muted);
}

.feature-text span {
  font-weight: bold;
}

/* ========================================
   System Overview
======================================== */
.system-overview {
  background-color: var(--color-bg);
}

.system-layout {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 32px;
  margin-top: 24px;
}

.system-column {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 20px 18px;
}

.system-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.system-text {
  font-size: 0.94rem;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.diagram-placeholder {
  margin-top: 12px;
  min-height: 160px;
  /* border-radius: var(--radius-md); */
  /* border: 1px dashed var(--color-border); */
  /* background-color: #fdfefe; */
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--color-muted);
  text-align: center;
  padding: 12px;
}

/* ========================================
   App Features
======================================== */
.app-features {
  background-color: #ffffff;
}

.app-feature-image-placeholder {
  width: 600px;
  min-height: 180px;
  /* border-radius: var(--radius-md); */
  /* border: 1px dashed var(--color-border); */
  /* background-color: #fdfefe; */
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-muted);
  padding: 12px;
  margin: 0 auto;
}

.app-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.app-feature-item {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 16px 14px 0;
}

.app-feature-title {
  font-size: 1rem;
  margin-bottom: 0.4rem;
  text-align: center;
}


.app-feature-text {
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* ========================================
   Specs Section
======================================== */
.specs-section {
  background-color: var(--color-bg);
}

.spec-item {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(0, 1.6fr);
  gap: 32px;
  padding: 20px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: #ffffff;
  margin-top: 24px;
  align-items: center;
}

.spec-media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.spec-image-placeholder {
  width: 100%;
  min-height: 180px;
  /* border-radius: var(--radius-md); */
  /* border: 1px dashed var(--color-border); */
  /* background-color: #fdfefe; */
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-muted);
  padding: 12px;
}

.spec-title {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}

.spec-note {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.spec-subtitle {
  font-size: 0.95rem;
  margin-top: 0.75rem;
  margin-bottom: 0.25rem;
}

.spec-list {
  font-size: 0.9rem;
  color: var(--color-text);
  padding-left: 1.1rem;
}
.spec-list span{
  font-weight: bold;
}
/* ========================================
   Option Section
======================================== */
.option-section {
  background-color: #ffffff;
}

.option-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.option-card {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 18px 16px;
}

.option-title {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.option-text {
  font-size: 0.92rem;
  color: var(--color-muted);
}

/* ========================================
   Use Cases
======================================== */
.usecase-section {
  /* background-color: var(--color-bg); */
  background-color: #ffffff!important;
}

.usecase-needs {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin: 8px 0 24px;
}

.usecase-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 8px;
}

.usecase-card {
  /* background-color: #ffffff; */
  /* border-radius: var(--radius-md); */
  /* border: 1px solid var(--color-border); */
  padding: 16px 12px;
  text-align: center;
}

/* .usecase-icon-placeholder {
  width: 56px;
  height: 56px;
  margin: 0 auto 8px;
  border-radius: 50%;
  background: rgba(0, 83, 166, 0.08);
} */
.usecase-image-placeholder {
    width: 100%;
    height: auto;
    margin-bottom: 12px;
}

.usecase-image-placeholder img {
    margin: 0 auto;
}

.usecase-title {
  font-size: 0.98rem;
}

/* ========================================
   Pricing
======================================== */
.pricing-section {
  /* background-color: #ffffff!important; */
}

.pricing-table-wrapper {
  margin-top: 24px;
  overflow-x: auto;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 680px;
}

.pricing-table th,
.pricing-table td {
  border: 1px solid var(--color-border);
  padding: 12px 10px;
  vertical-align: top;
}

.pricing-table th {
  /* background-color: var(--color-bg); */
  background-color: #fff;
  text-align: left;
  white-space: nowrap;
}
.pricing-table td {
  background-color: #fff;
}
.pricing-table td span{
  font-weight: bold;
}
/* ========================================
   Flow Section
======================================== */
.flow-section {
  /* background-color: var(--color-bg); */
  background-color: #ffffff!important;
}

.flow-steps {
  margin: 24px 0 0;
  padding-left: 0;
  list-style: none;
  counter-reset: flow-step;
}

.flow-step {
  position: relative;
  margin-bottom: 20px;
  padding-left: 2.4rem;
  counter-increment: flow-step;
}

.flow-step::before {
  content: counter(flow-step);
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background-color: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
}

.flow-step-title {
  font-size: 1rem;
  margin-bottom: 0.3rem;
}

.flow-step-text {
  font-size: 0.93rem;
  color: var(--color-muted);
}

/* ========================================
   Footer
======================================== */
/* ===== Footer (CTA style) ===== */
.site-footer {
  background-color: var(--color-footer-bg);
  color: #e5ecf5;
  padding: 64px 16px 56px;
}

.footer-inner--center {
  display: flex;
  justify-content: center;
  text-align: center;
}

.footer-main {
  max-width: 720px;
  width: 100%;
}

.footer-heading {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0 0 12px;
}

.footer-subtext {
  font-size: 0.95rem;
  margin: 0 0 24px;
}

.footer-tel-large {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin: 0 0 28px;
}

.footer-iframe-placeholder {
  min-height: 220px;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--color-border);
  background-color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-muted);
  padding: 16px;
}

.footer-iframe-placeholder iframe{
  width: 100%;
  height: 800px;
}

.footer-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2.8rem;
  border-radius: 999px;
  background-color: var(--color-accent);
  border: 1px solid var(--color-accent);
  color: #222222;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  margin-bottom: 28px;
}

.footer-cta:hover {
  background-color: #ff9f2b;
  border-color: #ff9f2b;
}

.footer-note {
  font-size: 0.8rem;
  color: #b6c4d8;
  margin: 0;
}

/* small screens */
@media (max-width: 480px) {
  .footer-heading {
    font-size: 1.5rem;
  }
  .footer-tel-large {
    font-size: 1.8rem;
  }
  .footer-cta {
    width: 100%;
  }
}
/* ========================================
   Responsive
======================================== */

/* <= 1024px (Tablet) */
@media (max-width: 1024px) {
  .hero-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-image-placeholder {
    align-self: stretch;
    width: 100%;
  }

  .feature-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .system-layout {
    grid-template-columns: 1fr;
  }

  .app-feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .spec-item {
    grid-template-columns: 1fr;
  }

  .option-list {
    grid-template-columns: 1fr;
  }

  .usecase-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .footer-actions {
    align-items: flex-start;
  }
}

/* <= 768px (Mobile) */
@media (max-width: 768px) {
  .br-sp {
    display: inline;
  }

  .header-inner {
    padding-inline: 16px;
  }

  .header-tel {
    display: none;
  }

  .global-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: #ffffff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px 16px;
    display: none;
  }

  .global-nav--open {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .nav-actions {
    width: 100%;
    justify-content: flex-start;
    gap: 10px;
  }

  .nav-actions .btn {
    width: auto;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .product-dropdown-row {
    /* flex-direction: column; */
    align-items: flex-start;
  }

  .product-dropdown-actions {
    /* width: 100%; */
    /* justify-content: flex-start; */
    gap: 10px;
    flex-wrap: wrap;
  }

  .product-dropdown-actions .btn {
    flex: 0 0 auto;
  }

  .hero {
    padding: 72px 0 56px;
    background-position: center top;
  }

  .solution-switch-inner {
    flex-wrap: wrap;
    gap: 8px;
    padding-inline: 16px;
  }

  .solution-tab {
    flex: 1 1 100%;
    text-align: center;
    white-space: normal;
    font-size: 0.9rem;
    padding: 10px 12px;
  }


  .overview-inner {
    grid-template-columns: 1fr;
  }

  .feature-cards {
    grid-template-columns: 1fr;
  }

  .app-feature-grid {
    grid-template-columns: 1fr;
  }

  .app-feature-image-placeholder {
    width: 100%;
  }
  .usecase-cards {
    grid-template-columns: 1fr;
  }

  .pricing-table {
    min-width: 560px;
  }
  
  .footer-iframe-placeholder iframe{
    height: 900px;
  }

  .section {
    padding: 48px 0;
  }
}

/* <= 480px (Small Mobile) */
@media (max-width: 480px) {
  .hero {
    padding: 48px 0 40px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .btn {
    padding-inline: 1rem;
    font-size: 0.85rem;
  }

  .product-dropdown-menu {
    left: 0;
    right: 0;
    min-width: 335px;
    max-width: none;
    width: 100%;
  }
}