:root {
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-tertiary: #f0f1f3;
  --color-bg-card: #ffffff;
  --color-primary: #1a1a2e;
  --color-secondary: #4a4a5a;
  --color-accent: #b8860b;
  --color-accent-hover: #d4a017;
  --color-accent-light: rgba(184, 134, 11, 0.08);
  --color-text: #1f2937;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-border: #e5e7eb;
  --color-border-dark: #d1d5db;
  --color-price: #dc2626;
  --color-success: #059669;
  --font-main: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Oswald', sans-serif;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
  --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
  --container-width: 1280px;
  --header-height: 130px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.loading-text {
  text-align: center;
  color: var(--color-text-muted);
  padding: 40px 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-primary:hover {
  background: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-dark);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

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

.btn-accent:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.header-top {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo img {
  height: 50px;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-main {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.logo-sub {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--color-accent);
}

.search-box {
  flex: 1;
  max-width: 420px;
}

.search-box form {
  display: flex;
  align-items: center;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  overflow: hidden;
  transition: var(--transition);
}

.search-box form:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.search-box input {
  flex: 1;
  padding: 12px 20px;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 14px;
  outline: none;
}

.search-box input::placeholder {
  color: var(--color-text-muted);
}

.search-box button {
  padding: 12px 18px;
  background: var(--color-primary);
  border: none;
  color: #fff;
  cursor: pointer;
  transition: var(--transition-fast);
}

.search-box button:hover {
  background: var(--color-secondary);
}

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

.header-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  color: var(--color-text-secondary);
  font-size: 11px;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

.nav {
  background: var(--color-primary);
}

.nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-list li a {
  display: block;
  padding: 14px 22px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  transition: var(--transition-fast);
}

.nav-list li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--color-accent);
  transition: var(--transition);
}

.nav-list li a:hover,
.nav-list li a.active {
  color: #fff;
}

.nav-list li a:hover::after,
.nav-list li a.active::after {
  width: 100%;
}

.nav-sale {
  color: #fbbf24 !important;
}

.hero {
  padding: calc(var(--header-height) + 60px) 0 80px;
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, #fff 100%);
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.hero-text {
  max-width: 600px;
}

.hero-subtitle {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 16px;
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent);
  border-radius: 50px;
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.hero-description {
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-badge {
  flex-shrink: 0;
}

.badge-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #9a7209 100%);
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
}

.badge-text {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 4px;
}

.badge-warranty {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: #fff;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.section-subtitle {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.view-all {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent);
}

.view-all:hover {
  color: var(--color-accent-hover);
}

.products-section {
  padding: 70px 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.product-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.product-card a {
  display: block;
}

.product-image {
  position: relative;
  aspect-ratio: 1;
  background: var(--color-bg-tertiary);
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
  transition: var(--transition);
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  background: var(--color-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
}

.product-info {
  padding: 18px;
  border-top: 1px solid var(--color-border);
}

.product-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 39px;
}

.product-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-price);
}

.product-price .tax {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: 4px;
}

.outlet-section {
  padding: 70px 0;
  background: var(--color-bg-secondary);
}

.outlet-banner {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-xl);
  padding: 50px;
  text-align: center;
}

.outlet-label {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-price);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: 50px;
  margin-bottom: 12px;
}

.outlet-title {
  font-family: var(--font-heading);
  font-size: 42px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.outlet-subtitle {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 6px;
}

.outlet-warranty {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.brands-section {
  padding: 70px 0;
  background: var(--color-bg-secondary);
}

.brands-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.brand-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.brand-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.brand-logo-img {
  width: 100%;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.brand-logo-img img {
  max-width: 100%;
  max-height: 80px;
  object-fit: contain;
}

.brand-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.brand-desc {
  font-size: 11px;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.features-section {
  padding: 70px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  text-align: center;
  padding: 32px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
  background: var(--color-accent-light);
  border-radius: 50%;
  color: var(--color-accent);
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.feature-note {
  color: var(--color-price);
  font-weight: 700;
}

.features-disclaimer {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.calendar-section {
  padding: 70px 0;
  background: var(--color-bg-secondary);
}

.calendar-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.calendar-container {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

.calendar-month {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  min-width: 320px;
  box-shadow: var(--shadow-sm);
}

.calendar-month-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar-header {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-align: center;
  padding: 8px 0;
}

.calendar-header.sun {
  color: var(--color-price);
}

.calendar-header.sat {
  color: #2563eb;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.calendar-day.empty {
  background: transparent;
}

.calendar-day.sun {
  color: var(--color-price);
}

.calendar-day.sat {
  color: #2563eb;
}

.calendar-day.today {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
}

.calendar-day.holiday {
  background: var(--color-price);
  color: #fff;
}

.calendar-day.noship {
  background: #fbbf24;
  color: var(--color-primary);
}

.calendar-legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 4px;
}

.legend-today {
  background: var(--color-accent);
}

.legend-holiday {
  background: var(--color-price);
}

.legend-noship {
  background: #fbbf24;
}

.info-section {
  padding: 70px 0;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.info-card {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.info-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.info-card ul li {
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 8px 0 8px 18px;
  position: relative;
}

.info-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

.footer {
  background: var(--color-primary);
  color: #fff;
  padding: 50px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 36px;
}

.footer-logo {
  height: 40px;
  width: auto;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-links ul li a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  box-shadow: var(--shadow-md);
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
}

@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-badge {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }

  .logo img {
    height: 40px;
  }

  .logo-main {
    font-size: 18px;
  }

  .logo-sub {
    font-size: 9px;
  }

  .search-box {
    display: none;
  }

  .header-btn span {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    transform: translateX(100%);
    transition: var(--transition);
    overflow-y: auto;
    z-index: 999;
  }

  .nav.active {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    padding: 20px;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list li a {
    color: var(--color-text);
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .hero {
    padding: calc(var(--header-height) + 40px) 0 50px;
  }

  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .product-info {
    padding: 14px;
  }

  .product-name {
    font-size: 12px;
    min-height: 36px;
  }

  .product-price {
    font-size: 16px;
  }

  .brands-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
  }

  .brand-card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 16px 16px;
    border: none;
    border-radius: 0;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    gap: 12px;
  }

  .brand-card:last-child {
    border-bottom: none;
  }

  .brand-card:hover {
    transform: none;
    box-shadow: none;
    background: var(--color-accent-light);
  }

  .brand-logo-img {
    display: none;
  }

  .brand-name {
    font-size: 14px;
    margin-bottom: 2px;
    flex: 1;
  }

  .brand-desc {
    font-size: 12px;
    color: var(--color-text-secondary);
  }

  .brand-card::after {
    content: '';
    width: 8px;
    height: 8px;
    border-top: 2px solid var(--color-text-muted);
    border-right: 2px solid var(--color-text-muted);
    transform: rotate(45deg);
    flex-shrink: 0;
  }

  .brand-card:hover::after {
    border-color: var(--color-accent);
  }

  .features-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
    text-align: center;
  }

  .outlet-banner {
    padding: 36px 20px;
  }

  .outlet-title {
    font-size: 32px;
  }

  .calendar-container {
    flex-direction: column;
    align-items: center;
  }

  .calendar-month {
    min-width: 280px;
    width: 100%;
    max-width: 360px;
  }
}

@media (max-width: 480px) {
  .logo-text {
    display: none;
  }

  .brand-card {
    padding: 14px 14px;
  }

  .brand-name {
    font-size: 13px;
  }

  .brand-desc {
    font-size: 11px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }
}