@charset "UTF-8";

:root {
  --color-primary-50: #E3F2FD;
  --color-primary-100: #BBDEFB;
  --color-primary-200: #90CAF9;
  --color-primary-300: #64B5F6;
  --color-primary-400: #42A5F5;
  --color-primary-500: #2196F3;
  --color-primary-600: #1E88E5;
  --color-primary-700: #1976D2;
  --color-primary-800: #1565C0;
  --color-primary-900: #0D47A1;

  --color-secondary-50: #FFF3E0;
  --color-secondary-100: #FFE0B2;
  --color-secondary-500: #FF9800;
  --color-secondary-600: #FB8C00;
  --color-secondary-700: #F57C00;

  --color-tertiary-500: #009688;

  --color-white: #FFFFFF;
  --color-neutral-50: #FAFAFA;
  --color-neutral-100: #F5F5F5;
  --color-neutral-200: #EEEEEE;
  --color-neutral-300: #E0E0E0;
  --color-neutral-400: #BDBDBD;
  --color-neutral-500: #9E9E9E;
  --color-neutral-600: #757575;
  --color-neutral-700: #616161;
  --color-neutral-800: #424242;
  --color-neutral-900: #212121;

  --color-text-primary: rgba(0, 0, 0, 0.87);
  --color-text-secondary: rgba(0, 0, 0, 0.60);
  --color-text-tertiary: rgba(0, 0, 0, 0.38);
  --color-divider: rgba(0, 0, 0, 0.12);

  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 40px;
  --space-xxxl: 48px;
  --space-huge: 64px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-2: 0 2px 6px rgba(0, 0, 0, 0.10);
  --shadow-3: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-4: 0 6px 10px rgba(0, 0, 0, 0.14);

  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --transition-fast: 200ms var(--ease-standard);
  --transition-normal: 300ms var(--ease-standard);
  --transition-slow: 400ms var(--ease-standard);

  --header-height: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-white: #FFFFFF;
    --color-neutral-50: #121212;
    --color-neutral-100: #1E1E1E;
    --color-neutral-200: #2D2D2D;
    --color-neutral-300: #383838;

    --color-text-primary: rgba(255, 255, 255, 0.87);
    --color-text-secondary: rgba(255, 255, 255, 0.60);
    --color-text-tertiary: rgba(255, 255, 255, 0.38);
    --color-divider: rgba(255, 255, 255, 0.12);

    --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-2: 0 2px 6px rgba(0, 0, 0, 0.3);
    --shadow-3: 0 4px 8px rgba(0, 0, 0, 0.35);
    --shadow-4: 0 6px 10px rgba(0, 0, 0, 0.4);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: var(--color-neutral-50);
  }
}

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

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-800);
}

@media (prefers-color-scheme: dark) {
  a {
    color: var(--color-primary-300);
  }
  a:hover {
    color: var(--color-primary-100);
  }
}

.material-symbols-outlined {
  font-variation-settings:
    'FILL' 0,
    'wght' 400,
    'GRAD' 0,
    'opsz' 24;
  user-select: none;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-lg);
  }
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  margin-bottom: var(--space-sm);
  color: var(--color-neutral-900);
}

@media (min-width: 768px) {
  .section-title {
    font-size: 32px;
  }
}

@media (prefers-color-scheme: dark) {
  .section-title {
    color: var(--color-white);
  }
}

.section-subtitle {
  font-size: 16px;
  line-height: 1.5;
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xxxl);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

@media (prefers-color-scheme: dark) {
  .header {
    background: rgba(18, 18, 18, 0.85);
  }
}

.header--scrolled {
  border-bottom-color: var(--color-divider);
  box-shadow: var(--shadow-1);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-neutral-900);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  transition: opacity var(--transition-fast);
}

.header__logo:hover {
  opacity: 0.7;
  color: var(--color-neutral-900);
}

@media (prefers-color-scheme: dark) {
  .header__logo {
    color: var(--color-white);
  }
  .header__logo:hover {
    color: var(--color-white);
  }
}

.header__logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.header__menu-toggle {
  display: none;
}

.header__menu-button {
  display: none;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--color-text-primary);
  transition: background-color var(--transition-fast);
}

.header__menu-button:hover {
  background-color: var(--color-neutral-100);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.header__nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.header__nav-link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-neutral-100);
}

@media (prefers-color-scheme: dark) {
  .header__nav-link:hover {
    background-color: var(--color-neutral-200);
  }
}

.header__lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-xxs);
  margin-left: var(--space-xs);
  padding-left: var(--space-sm);
  border-left: 1px solid var(--color-divider);
}

.header__lang-item {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  padding: var(--space-xxs) var(--space-xs);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.header__lang-item:hover {
  color: var(--color-text-primary);
  background-color: var(--color-neutral-100);
}

.header__lang-item.is-active {
  color: var(--color-primary-600);
  background-color: var(--color-primary-50);
}

@media (prefers-color-scheme: dark) {
  .header__lang-item:hover {
    background-color: var(--color-neutral-200);
  }
  .header__lang-item.is-active {
    color: var(--color-primary-200);
    background-color: rgba(33, 150, 243, 0.15);
  }
}

@media (max-width: 767px) {
  .header__menu-button {
    display: flex;
  }

  .header__menu-toggle:checked ~ .header__menu-button {
    color: var(--color-primary-500);
  }

  .header__nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  @media (prefers-color-scheme: dark) {
    .header__nav {
      background: rgba(18, 18, 18, 0.98);
    }
  }

  .header__menu-toggle:checked ~ .header__nav {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .header__nav-link {
    font-size: 16px;
    padding: var(--space-md);
    border-radius: var(--radius-md);
  }

  .header__lang-switch {
    margin-left: 0;
    padding-left: 0;
    padding-top: var(--space-md);
    border-left: none;
    border-top: 1px solid var(--color-divider);
    justify-content: center;
    gap: var(--space-sm);
  }

  .header__lang-item {
    font-size: 15px;
    padding: var(--space-sm) var(--space-md);
  }
}

.hero {
  padding-top: calc(var(--header-height) + var(--space-xxxl));
  padding-bottom: var(--space-huge);
  background:
    radial-gradient(ellipse at 50% 0%, var(--color-primary-50) 0%, transparent 60%),
    var(--color-white);
  position: relative;
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  .hero {
    background:
      radial-gradient(ellipse at 50% 0%, rgba(33, 150, 243, 0.08) 0%, transparent 60%),
      var(--color-neutral-50);
  }
}

.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  opacity: 0.4;
  pointer-events: none;
}

.hero::before {
  width: 400px;
  height: 400px;
  top: -100px;
  right: -100px;
  background: radial-gradient(circle, var(--color-primary-100) 0%, transparent 70%);
}

.hero::after {
  width: 300px;
  height: 300px;
  bottom: -50px;
  left: -80px;
  background: radial-gradient(circle, var(--color-secondary-50) 0%, transparent 70%);
}

@media (prefers-color-scheme: dark) {
  .hero::before {
    background: radial-gradient(circle, rgba(33, 150, 243, 0.06) 0%, transparent 70%);
  }
  .hero::after {
    background: radial-gradient(circle, rgba(255, 152, 0, 0.04) 0%, transparent 70%);
  }
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero__icon-wrapper {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-4);
  margin-bottom: var(--space-lg);
  animation: heroFloat 4s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

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

.hero__icon {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__title {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-neutral-900);
  margin-bottom: var(--space-sm);
}

@media (min-width: 768px) {
  .hero__title {
    font-size: 56px;
  }
}

@media (prefers-color-scheme: dark) {
  .hero__title {
    color: var(--color-white);
  }
}

.hero__subtitle {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary-600);
  margin-bottom: var(--space-md);
}

@media (min-width: 768px) {
  .hero__subtitle {
    font-size: 20px;
  }
}

@media (prefers-color-scheme: dark) {
  .hero__subtitle {
    color: var(--color-primary-300);
  }
}

.hero__description {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 520px;
}

@media (min-width: 768px) {
  .hero__description {
    font-size: 17px;
  }
}

.features {
  padding: var(--space-huge) 0;
  background-color: var(--color-white);
}

@media (prefers-color-scheme: dark) {
  .features {
    background-color: var(--color-neutral-50);
  }
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 600px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .features__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-neutral-200);
  background: var(--color-white);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

@media (prefers-color-scheme: dark) {
  .feature-card {
    background: var(--color-neutral-100);
    border-color: var(--color-neutral-200);
  }
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-3);
  border-color: var(--color-primary-200);
}

@media (prefers-color-scheme: dark) {
  .feature-card:hover {
    border-color: var(--color-primary-700);
  }
}

.feature-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-50);
  color: var(--color-primary-600);
  margin-bottom: var(--space-md);
}

.feature-card__icon .material-symbols-outlined {
  font-size: 24px;
}

@media (prefers-color-scheme: dark) {
  .feature-card__icon {
    background-color: rgba(33, 150, 243, 0.15);
    color: var(--color-primary-300);
  }
}

.feature-card__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-neutral-900);
  margin-bottom: var(--space-xs);
}

@media (prefers-color-scheme: dark) {
  .feature-card__title {
    color: var(--color-white);
  }
}

.feature-card__description {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.faq {
  padding: var(--space-huge) 0;
  background-color: var(--color-neutral-50);
}

@media (prefers-color-scheme: dark) {
  .faq {
    background-color: var(--color-neutral-100);
  }
}

.faq__list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

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

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

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  width: 100%;
  padding: var(--space-lg) 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast);
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question::marker {
  content: '';
}

.faq__question:hover {
  color: var(--color-primary-600);
}

@media (prefers-color-scheme: dark) {
  .faq__question:hover {
    color: var(--color-primary-300);
  }
}

.faq__question-icon {
  flex-shrink: 0;
  color: var(--color-text-tertiary);
  transition: transform var(--transition-normal), color var(--transition-fast);
}

.faq__item[open] > .faq__question .faq__question-icon {
  transform: rotate(180deg);
  color: var(--color-primary-500);
}

.faq__answer {
  padding-bottom: var(--space-lg);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 640px;
}

.contact {
  padding: var(--space-huge) 0;
  background-color: var(--color-white);
}

@media (prefers-color-scheme: dark) {
  .contact {
    background-color: var(--color-neutral-50);
  }
}

.contact__card {
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-neutral-200);
  background: var(--color-white);
  box-shadow: var(--shadow-2);
  text-align: center;
}

@media (prefers-color-scheme: dark) {
  .contact__card {
    background: var(--color-neutral-100);
    border-color: var(--color-neutral-200);
  }
}

.contact__icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-50);
  color: var(--color-primary-600);
  margin: 0 auto var(--space-md);
}

.contact__icon-wrapper .material-symbols-outlined {
  font-size: 28px;
}

@media (prefers-color-scheme: dark) {
  .contact__icon-wrapper {
    background-color: rgba(33, 150, 243, 0.15);
    color: var(--color-primary-300);
  }
}

.contact__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.contact__email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-white);
  background-color: var(--color-primary-500);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.contact__email:hover {
  background-color: var(--color-primary-700);
  transform: translateY(-1px);
  color: var(--color-white);
}

.contact__email .material-symbols-outlined {
  font-size: 18px;
}

.footer {
  padding: var(--space-xl) 0;
  background-color: var(--color-neutral-900);
  color: rgba(255, 255, 255, 0.60);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  text-align: center;
}

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__link {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.60);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-primary-300);
}

.footer__divider {
  color: rgba(255, 255, 255, 0.2);
  font-size: 12px;
}

.footer__copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.38);
}

.page {
  padding-top: calc(var(--header-height) + var(--space-xxxl));
  padding-bottom: var(--space-huge);
  min-height: 70vh;
}

.page__title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: var(--color-neutral-900);
}

@media (min-width: 768px) {
  .page__title {
    font-size: 32px;
  }
}

@media (prefers-color-scheme: dark) {
  .page__title {
    color: var(--color-white);
  }
}

.page__content {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 720px;
}

.page__content p {
  margin-bottom: var(--space-md);
}

.page__content a {
  color: var(--color-primary-600);
}

.prose {
  max-width: 720px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.prose h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-neutral-900);
  margin-top: var(--space-xxxl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-divider);
}

@media (min-width: 768px) {
  .prose h2 {
    font-size: 22px;
  }
}

@media (prefers-color-scheme: dark) {
  .prose h2 {
    color: var(--color-white);
  }
}

.prose h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-neutral-800);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

@media (prefers-color-scheme: dark) {
  .prose h3 {
    color: var(--color-neutral-200);
  }
}

.prose p {
  margin-bottom: var(--space-md);
}

.prose ul,
.prose ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

.prose li {
  margin-bottom: var(--space-xs);
}

.prose a {
  color: var(--color-primary-600);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose a:hover {
  color: var(--color-primary-800);
}

@media (prefers-color-scheme: dark) {
  .prose a {
    color: var(--color-primary-300);
  }
  .prose a:hover {
    color: var(--color-primary-100);
  }
}

.prose strong {
  font-weight: 600;
  color: var(--color-text-primary);
}

.prose .updated {
  display: inline-block;
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-xl);
}

.prose .service-list {
  list-style: none;
  padding: 0;
}

.prose .service-list li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-divider);
}

.prose .service-list li:last-child {
  border-bottom: none;
}

.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease-standard), transform 0.6s var(--ease-standard);
}

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

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media print {
  .header {
    position: static;
    border-bottom: 1px solid #ccc;
    background: white;
    backdrop-filter: none;
  }

  .hero::before,
  .hero::after {
    display: none;
  }

  .hero {
    background: white;
    padding-top: var(--space-lg);
  }

  .feature-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .footer {
    background: white;
    color: black;
  }

  .footer__link,
  .footer__copyright {
    color: #333;
  }
}