/* ====== Custom Properties ====== */
:root {
  /* Colors */
  --color-text-primary: #171e2e;
  --color-text-secondary: #5a6372;
  --color-text-link: #2563eb;
  --color-text-link-hover: #1d4ed8;
  --color-text-on-dark: #ffffff;

  --color-bg-primary: #EDF4FF;
  --color-bg-secondary: #CBDEFB;
  --color-bg-card: #edf4ff;
  --color-bg-section: #ffffff;
  --color-bg-footer: #171e2e;

  --color-brand-blue: #2563eb;
  --color-brand-cyan: #7cf7ff;
  --color-brand-purple: #7b52fd;

  --color-cta-from: #FF4527;
  --color-cta-to: #FE9E45;

  --color-border: #3B3F52;
  --color-focus: #2563eb;

  /* Spacing */
  --space-1: 2px;
  --space-2: 4px;
  --space-3: 8px;
  --space-4: 12px;
  --space-5: 16px;
  --space-6: 24px;
  --space-7: 40px;
  --space-8: 64px;
  --space-xl: 80px;

  /* Typography */
  --font-size-xs: clamp(0.75rem, 0.464rem + 1.429vw, 0.8125rem);
  --font-size-sm: clamp(0.8125rem, 0.527rem + 1.429vw, 0.875rem);
  --font-size-base: clamp(0.9375rem, 0.652rem + 1.429vw, 1rem);
  --font-size-md: clamp(1rem, 0.429rem + 2.857vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, -0.589rem + 8.571vw, 1.5rem);
  --font-size-xl: clamp(1.375rem, -0.911rem + 11.429vw, 1.875rem);
  --font-size-2xl: clamp(1.625rem, 1.339rem + 1.429vw, 1.6875rem);
  --font-size-display: clamp(1.875rem, 1.589rem + 1.429vw, 1.9375rem);

  --font-family-base: 'Noto Sans JP', Meiryo, 'BIZ UDPGothic', 'Yu Gothic', sans-serif;
  --font-family-en: 'Orbitron', 'Noto Sans JP', sans-serif;
  --font-weight-normal: 500;
  --font-weight-bold: 900;

  /* Effects */
  --shadow-card: 0 4px 16px rgba(20, 24, 42, 0.06);
  --shadow-cta: 0px 5px 5px rgba(0, 0, 10, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;
}

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

html {
  scroll-behavior: smooth;
  overscroll-behavior: none;
}

body {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt";
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

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

a {
  color: var(--color-text-link);
  text-decoration: none;
}
a:hover {
  color: var(--color-text-link-hover);
}

/* ====== Layout ====== */
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* ====== Header ====== */
.page-header {
  padding: var(--space-4) 0;
  border-bottom: 1px solid transparent;
  background: rgba(255, 255, 255, 0.92);
  text-align: center;
}
.page-header .logo {
  margin: 0 auto;
}

.site-header {
  padding: var(--space-4) 0;
  border-bottom: 1px solid transparent;
  position: sticky;
  top: 0;
  z-index: 100;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.92);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: center;
}
.logo {
  display: inline-flex;
  align-items: center;
  width: 100%;
  max-width: 133px;
}

/* sticky CTA 分の余白 */
@media (max-width: 767px) {
  .site-footer { padding-bottom: 80px; }
}

/* ====== Hero (index) ====== */
.hero {
  position: relative;
  background: url(../image/hero-bg.png);
  background-position: center;
  background-size: cover;
  padding: var(--space-7) 0 var(--space-8);
  overflow: hidden;
}
.hero .container {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero__title {
  font-size: var(--font-size-display);
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
  text-align: center;
  margin: 0 auto var(--space-6);
  color: var(--color-text-on-dark);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}
.hero__title .accent {
  color: #8794ff;
}
.hero__title .small {
  font-size: var(--font-size-lg);
}
.hero__title > span {
  display: inline-block;
  background-image: linear-gradient(#000 100%, #000 100%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  background-position: left bottom;
  padding: 0 0.3em;
}
.hero__visual {
  margin: 0 auto var(--space-6);
  max-width: 480px;
}
.hero__lead {
  margin: 0;
  text-align: center;
  font-size: var(--font-size-md);
  line-height: 1.7;
  letter-spacing: 0.06em;
  text-shadow: 0px 0px 4px rgba(0, 0, 0, 0.25);
}
.hero__lead-emphasis {
  display: block;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
}
.hero__lead-emphasis .small {
  font-size: var(--font-size-lg);
}
.hero__badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  list-style: none;
  padding: 0;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-5);
  background: linear-gradient(95.2deg, #019af2 -0.77%, #7b52fd 111.99%);
  color: var(--color-text-on-dark);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  border-radius: 3px;
  line-height: 1.2;
}
.marker {
  display: inline-block;
  background-image: linear-gradient(transparent 60%, var(--color-brand-cyan) 60%);
  background-repeat: no-repeat;
  background-size: 0% 100%;
  background-position: left bottom;
  padding: 0 0.3em;
}

/* ====== CTA ====== */
.cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
  max-width: 360px;
  margin: 0 auto;
  padding: var(--space-5) var(--space-6);
  background: linear-gradient(90deg, var(--color-cta-from), var(--color-cta-to));
  color: var(--color-text-on-dark);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  border: 2px solid #FFFFFF;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: var(--shadow-cta);
  text-decoration: none;
  line-height: 1.2;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease;
}
.cta:hover {
  transform: translateY(-2px);
  color: var(--color-text-on-dark);
  box-shadow: 0px 8px 12px rgba(0, 0, 10, 0.4);
}
.cta__arrow,
.cta__phone {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ====== Section common ====== */
.section {
  padding: var(--space-8) 0;
  background: var(--color-bg-primary);
}
.section--secondary {
  background: var(--color-bg-secondary);
}
.section--alt {
  background: var(--color-bg-section);
}
.section__head {
  text-align: center;
  margin-bottom: var(--space-6);
}
#solution .section__head {
  margin-bottom: var(--space-8);
}
.section__eyebrow {
  display: inline-block;
  font-family: var(--font-family-en);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--color-brand-blue);
  letter-spacing: 0.08em;
  position: relative;
  padding-bottom: var(--space-3);
  margin-top: 0;
  margin-bottom: var(--space-4);
}
.section__eyebrow::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 32px;
  height: 1px;
  background: var(--color-brand-blue);
}
.section__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
  margin: 0;
}
.section__title .small {
  font-size: var(--font-size-lg);
}
.section__lead {
  text-align: center;
  font-size: var(--font-size-base);
  margin: var(--space-5) 0 0;
}

/* ====== AI solution ====== */
.solution-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}
.solution-card {
  background: var(--color-bg-section);
  border-radius: var(--radius-md);
  padding: 0 0 var(--space-6);
  text-align: center;
  position: relative;
}
.solution-card__num {
  position: absolute;
  top: calc(-1 * var(--space-6));
  left: 50%;
  transform: translateX(-50%);
  width: 70px;
  height: 70px;
  background: var(--color-brand-blue);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-en);
  font-size: var(--font-size-lg);
  font-variant-numeric: tabular-nums;
}
.solution-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-brand-blue);
  margin: var(--space-8) 0 var(--space-5);
  line-height: 1.3;
}
.solution-card__tag {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  background: var(--color-bg-footer);
  color: var(--color-text-on-dark);
  font-weight: var(--font-weight-bold);
  border-radius: 3px;
  margin-bottom: var(--space-5);
  line-height: 1.2;
}
.solution-card__visual {
  width: 100%;
  height: 200px;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.solution-card__visual-text {
  font-family: 'Brush Script MT', cursive;
  font-size: clamp(2.2rem, -1.457rem + 18.286vw, 3rem);
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.02em;
  transform: rotate(-4deg);
}
.solution-card__chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  list-style: none;
  padding: 0;
}
.chip {
  padding: var(--space-2) var(--space-5);
  background: linear-gradient(95.2deg, #019af2 -0.77%, #7b52fd 111.99%);
  color: var(--color-text-on-dark);
  border-radius: 3px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
}
.solution-card__text {
  font-size: var(--font-size-base);
  margin: 0;
  padding: 0 var(--space-5);
  text-align: left;
  line-height: 1.7;
}

/* ====== Service ====== */
.service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
}
.service-card {
  position: relative;
  text-align: center;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.service-card:has(.service-card__bubble) {
  padding: 0 0 var(--space-6);
}
.service-card:not(:has(.service-card__bubble)) {
  background: var(--color-bg-card);
  padding: var(--space-7) var(--space-5);
}
.service-card__bg {
  position: absolute;
  z-index: -1;
  width: 100%;
  height: 100%;
  background: var(--color-bg-section);
}
.service-card__bubble {
  background: #edf4ff;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: var(--space-5) var(--space-5) var(--space-4);
  position: relative;
  z-index: 0;
  margin-bottom: 28px;
}
.service-card__bubble::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 20px solid transparent;
  border-right: 20px solid transparent;
  border-top: 20px solid #edf4ff;
}
.service-card__icon {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-5);
  background: var(--color-bg-section);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}
.service-card__icon img,
.service-card__icon svg {
  width: 100%;
  height: auto;
  max-height: 65px;
}
.service-card__label {
  display: inline-block;
  padding: var(--space-2) var(--space-5);
  background: linear-gradient(95.2deg, #019af2 -0.77%, #7b52fd 111.99%);
  color: var(--color-text-on-dark);
  border-radius: 3px;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-top: 0;
  margin-bottom: var(--space-4);
  line-height: 1.3;
}
.service-card__desc {
  font-size: var(--font-size-sm);
  margin: 0;
}
.service-card__benefit {
  color: var(--color-brand-blue);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
  margin: 0;
  line-height: 1.4;
}

/* ====== Strengths ====== */
.strengths-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}
.strength-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-7) var(--space-6) var(--space-6);
  text-align: center;
  position: relative;
}
.strength-card__num {
  position: absolute;
  top: calc(-1 * var(--space-6));
  left: 50%;
  transform: translateX(-50%);
  width: 70px;
  height: 70px;
  background: var(--color-brand-blue);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-en);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  font-variant-numeric: tabular-nums;
}
.strength-card__visual {
  margin: var(--space-4) auto var(--space-3);
  max-width: 162px;
}
.strength-card__title {
  font-size: var(--font-size-md);
  line-height: 1.3;
  margin: 0 0 var(--space-4);
  font-weight: var(--font-weight-bold);
}
.strength-card__title strong {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-top: var(--space-2);
  color: var(--color-brand-blue);
}
.strength-card__divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-5) auto;
  border: none;
}
.strength-card__desc {
  font-size: var(--font-size-sm);
  margin: 0;
}

/* ====== Use case ====== */
.usecase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}
.usecase-card {
  background: var(--color-bg-section);
  border-radius: var(--radius-md);
  padding: var(--space-8) var(--space-5) var(--space-6);
  box-shadow: var(--shadow-card);
  position: relative;
}
.usecase-card::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 14px solid transparent;
  border-right: 14px solid transparent;
  border-top: 16px solid var(--color-bg-section);
  filter: drop-shadow(0 4px 4px rgba(0, 0, 0, 0.05));
}
.usecase-card:last-child::after {
  display: none;
}
.usecase-card__num {
  position: absolute;
  top: calc(-1 * var(--space-6));
  left: 50%;
  transform: translateX(-50%);
  width: 70px;
  height: 70px;
  background: var(--color-brand-blue);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-en);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  font-variant-numeric: tabular-nums;
}
.usecase-card__visual {
  width: 100%;
  height: 200px;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  overflow: hidden;
  position: relative;
}
.usecase-card__visual--1 {
  background: linear-gradient(135deg, #1c2a4d 0%, #2563eb 50%, #58a8ff 100%);
}
.usecase-card__visual--2 {
  background: linear-gradient(135deg, #0f1d40 0%, #1d4ed8 60%, #00bfff 100%);
}
.usecase-card__visual--3 {
  background: linear-gradient(135deg, #2c3a72 0%, #4a72d4 100%);
}
.usecase-card__title {
  text-align: center;
  color: var(--color-brand-blue);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin: 0 0 var(--space-5);
  line-height: 1.3;
}
.usecase-card__text {
  font-size: var(--font-size-sm);
  margin: 0;
}

/* ====== Trusted ====== */
.trusted-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0;
}
.trusted-item {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  background: var(--color-bg-card);
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-md);
}
.trusted-item__icon {
  width: 56px;
  height: 56px;
  background: var(--color-bg-section);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: var(--space-4);
}
.trusted-item__icon img {
  max-height: 32px;
  width: auto;
}
.trusted-item__text {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
}
.trusted-note {
  text-align: right;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-4);
}

/* ====== Company ====== */
.company-table {
  background: var(--color-bg-section);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
}
.company-row {
  padding: var(--space-5) 0;
  border-bottom: 1px dashed var(--color-border);
}
.company-row:first-child {
  padding-top: 0;
}
.company-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.company-row__label {
  font-weight: var(--font-weight-bold);
  margin: 0 0 var(--space-2);
  font-size: var(--font-size-base);
}
.company-row__value {
  margin: 0;
  color: var(--color-text-primary);
  line-height: 1.7;
}
.company-row__value--list {
  padding-left: 1.2em;
  margin: 0;
}
.company-row__note {
  text-align: right;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-top: var(--space-3);
}
.company-map {
  margin-top: var(--space-6);
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #e8eef7, #d8e2f3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* ====== Page hero (privacy) ====== */
.page-hero {
  background: linear-gradient(135deg, #1c2a4d 0%, #2563eb 60%, #58a8ff 100%);
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-6) 0;
}
.page-hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}
.page-hero__eyebrow {
  font-family: var(--font-family-en);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.12em;
  margin: 0;
}
.page-hero__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-on-dark);
  margin: 0;
  line-height: 1.3;
}

/* ====== Policy (privacy) ====== */
.policy {
  padding: var(--space-8) 0;
  background: var(--color-bg-primary);
}
.policy__inner {
  background: var(--color-bg-section);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-7) var(--space-6);
  max-width: 680px;
  margin: 0 auto;
}
.policy__updated {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-align: right;
  margin: 0 0 var(--space-7);
}
.policy__intro {
  font-size: var(--font-size-base);
  margin: 0 0 var(--space-7);
  line-height: 1.8;
}
.policy__section {
  margin-bottom: var(--space-7);
}
.policy__section:last-child {
  margin-bottom: 0;
}
.policy__heading {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  border-bottom: 2px solid var(--color-brand-blue);
  padding-bottom: var(--space-3);
  margin: 0 0 var(--space-5);
  line-height: 1.5;
}
.policy__text {
  font-size: var(--font-size-base);
  margin: 0 0 var(--space-4);
  line-height: 1.8;
}
.policy__text:last-child {
  margin-bottom: 0;
}
.policy__contact {
  background: var(--color-bg-primary);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  font-size: var(--font-size-sm);
  line-height: 1.8;
  margin-top: var(--space-4);
}
.policy__contact p {
  margin: 0 0 var(--space-3);
}
.policy__contact p:last-child {
  margin-bottom: 0;
}
.policy__contact p:has(> *:first-child),
.policy__contact p[data-note] {
  color: var(--color-text-secondary);
}
.policy__dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0 0 var(--space-4);
  font-size: var(--font-size-sm);
  line-height: 1.8;
}
.policy__dl:last-child {
  margin-bottom: 0;
}
.policy__dl dt {
  font-weight: var(--font-weight-bold);
  color: var(--color-text-secondary);
  margin-top: var(--space-3);
}
.policy__dl dt:first-child {
  margin-top: 0;
}
.policy__dl dd {
  margin: 0;
}
.policy__note {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0 0 var(--space-3);
}
.policy__note:last-child {
  margin-bottom: 0;
}

/* ====== Back link ====== */
.back-link {
  text-align: center;
  padding: var(--space-6) 0 var(--space-8);
}
.back-link a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-brand-blue);
}
.back-link a:hover {
  color: var(--color-text-link-hover);
}

/* ====== Footer ====== */
.site-footer {
  background: var(--color-bg-footer);
  color: var(--color-text-on-dark);
  padding: var(--space-7) 0;
}
.site-footer__inner {
  text-align: center;
}
.site-footer .logo {
  background: var(--color-text-on-dark);
  padding: 3px 0;
  margin-bottom: var(--space-5);
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-7);
}
.footer-nav a {
  color: var(--color-text-on-dark);
  font-size: var(--font-size-sm);
  text-decoration: none;
}
.footer-nav a:hover {
  color: var(--color-brand-cyan);
}
.site-footer .cta {
  border-radius: 0;
  max-width: none;
  margin: 0;
}
.footer-copyright {
  text-align: center;
  padding: var(--space-5) 0;
  background: #0c0f1f;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-xs);
  margin: 0;
}

/* ====== Sticky CTA (mobile) ====== */
#aside-content {
  display: none;
}
#sticky-cta {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 390px;
  padding: var(--space-3) var(--space-5) calc(var(--space-3) + env(safe-area-inset-bottom));
  z-index: 200;
}
#sticky-cta .cta {
  margin: 0;
}
@media (min-width: 768px) {
  #sticky-cta { display: none; }
}

/* ====== Decorative ====== */
.deco-line {
  display: block;
  margin: 0 auto var(--space-6);
  width: 40px;
  height: 2px;
}
.section__underline {
  display: block;
  margin: var(--space-2) auto var(--space-3);
  width: 140px;
  height: 10px;
  overflow: visible;
}

/* ====== Animations ====== */
@keyframes hue-cycle {
  0%,
  100% {
    filter: hue-rotate(0deg);
  }
  50% {
    filter: hue-rotate(45deg);
  }
}
@keyframes hue-cycle-warm {
  0%,
  100% {
    filter: hue-rotate(0deg);
  }
  50% {
    filter: hue-rotate(-30deg);
  }
}
@keyframes logo-float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg) scale(1);
  }
  50% {
    transform: translateY(-3px) rotate(6deg) scale(1.07);
  }
}
@keyframes arrow-nudge {
  0%,
  100% {
    transform: translateX(0);
  }
  55% {
    transform: translateX(5px);
  }
}

.badge {
  animation: hue-cycle 7s ease-in-out infinite;
}
.chip {
  animation: hue-cycle 7s ease-in-out 0.6s infinite;
}
.solution-card__tag {
  animation: hue-cycle 7s ease-in-out 1.2s infinite;
}
.service-card__label {
  animation: hue-cycle 7s ease-in-out 1.8s infinite;
}
.cta {
  animation: hue-cycle-warm 9s ease-in-out infinite;
}
.cta__arrow {
  animation: arrow-nudge 1.4s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .cta__arrow {
    animation: none;
  }
}

/* ====== Responsive (>=768px) ====== */
@media (min-width: 768px) {
  #main-content {
    margin: auto;
    max-width: 390px;
  }
  #bg {
    position: fixed;
    width: 100%;
    height: 100%;
    background-image: url(../image/pc-bg.png);
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    z-index: -5;
  }
  #aside-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    position: fixed;
    top: 50%;
    left: calc(25% - 97.5px);
    transform: translateX(-50%) translateY(-50%);
  }
  .menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }
  .menu a {
    font-family: var(--font-family-en);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    transition: color 0.2s ease;
  }
  .menu a::before {
    content: '';
    display: block;
    width: 16px;
    height: 1px;
    background: currentColor;
    flex-shrink: 0;
    transition: width 0.25s ease;
  }
  .menu a:hover {
    color: var(--color-brand-blue);
  }
  .menu a.is-active {
    color: var(--color-brand-blue);
  }
  .menu a.is-active::before {
    width: 28px;
  }
}