:root {
  /* カラーパレット - ウォームブラウン系に変更 */
  --color-primary: #A47864;
  /* メインカラー: ウォームブラウン */
  --color-primary-dark: #4B3832;
  /* アクセントカラー1: ダークブラウン */
  --color-primary-light: #D7CEC7;
  /* アクセントカラー2: ライトベージュ */
  --color-secondary: #4B3832;
  /* セカンダリーにダークブラウンを使用 */
  --color-secondary-light: #D7CEC7;
  /* セカンダリーライトにライトベージュを使用 */
  --color-accent: #4B3832;
  /* アクセントにダークブラウンを使用 */
  --color-accent-dark: #2C2C2C;
  /* アクセントダークにチャコールグレーを使用 */
  --color-text: #2C2C2C;
  /* ニュートラルカラー2: チャコールグレー */
  --color-text-light: #666666;
  /* テキストライトは少し明るいグレー */
  --color-background: #FFFFFF;
  /* 背景色は白のまま */
  --color-background-gray: #F4F4F4;
  /* ニュートラルカラー1: オフホワイト */
  --color-background-light: #F9F7F6;
  /* 背景ライトは少し暖かみのあるオフホワイト */
  --color-border: #E5E0DC;
  /* ボーダーはライトベージュよりも少し暗め */
  --color-error: #B25D56;
  /* エラー色はブラウン系に合わせて調整 */
  --color-success: #5B8A72;
  /* 成功色はそのまま */

  /* フォント - 日本語と英語フォントを明確に区別 */
  --font-family-base: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-family-heading: 'Montserrat', 'Noto Sans JP', sans-serif;
  --font-family-code: 'Source Code Pro', monospace;

  /* フォントウェイト */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* フォントサイズ - レスポンシブに対応するためclamp()関数を使用 */
  --font-size-xs: clamp(0.7rem, 0.7rem + 0.05vw, 0.75rem);
  /* 12px前後 */
  --font-size-sm: clamp(0.8rem, 0.8rem + 0.1vw, 0.875rem);
  /* 14px前後 */
  --font-size-base: clamp(0.95rem, 0.95rem + 0.1vw, 1rem);
  /* 16px前後 */
  --font-size-md: clamp(1.05rem, 1.05rem + 0.2vw, 1.125rem);
  /* 18px前後 */
  --font-size-lg: clamp(1.25rem, 1.25rem + 0.5vw, 1.5rem);
  /* 24px前後 */
  --font-size-xl: clamp(1.5rem, 1.5rem + 1vw, 2rem);
  /* 32px前後 */
  --font-size-xxl: clamp(2rem, 2rem + 2vw, 3rem);
  /* 48px前後 */

  /* スペーシング - 8の倍数に調整しつつレスポンシブ対応 */
  --space-xs: clamp(0.25rem, 0.25rem + 0.1vw, 0.375rem);
  /* 4-6px */
  --space-sm: clamp(0.5rem, 0.5rem + 0.1vw, 0.625rem);
  /* 8-10px */
  --space-md: clamp(0.875rem, 0.875rem + 0.25vw, 1.25rem);
  /* 14-20px */
  --space-lg: clamp(1.25rem, 1.25rem + 0.5vw, 1.75rem);
  /* 20-28px */
  --space-xl: clamp(1.75rem, 1.75rem + 0.5vw, 2.25rem);
  /* 28-36px */
  --space-xxl: clamp(2.5rem, 2.5rem + 1vw, 3.5rem);
  /* 40-56px */
  --space-xxxl: clamp(3.5rem, 3.5rem + 1vw, 4.5rem);
  /* 56-72px */

  /* アニメーション */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --animation-duration: 0.8s;

  /* ボーダーレディウス */
  --radius-sm: 0.25rem;
  /* 4px */
  --radius-md: 0.5rem;
  /* 8px */
  --radius-lg: 1rem;
  /* 16px */
  --radius-xl: 1.5rem;
  /* 24px */
  --radius-full: 9999px;
  /* 円形 */

  /* ボックスシャドウ - より高級感のある自然な陰影に調整 */
  --shadow-sm: 0 1px 2px rgba(44, 40, 36, 0.04), 0 1px 4px rgba(44, 40, 36, 0.04);
  --shadow-md: 0 4px 6px rgba(44, 40, 36, 0.03), 0 10px 15px rgba(44, 40, 36, 0.03);
  --shadow-lg: 0 10px 25px rgba(44, 40, 36, 0.04), 0 20px 48px rgba(44, 40, 36, 0.04);
  --shadow-focus: 0 0 0 3px rgba(164, 120, 100, 0.25);

  /* コンテナ最大幅 - より柔軟にレスポンシブ対応 */
  --container-width: clamp(320px, 90vw, 1300px);
  --container-width-narrow: clamp(320px, 90vw, 800px);
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-base);
  color: var(--color-text);
  line-height: 1.6;
  background-color: var(--color-background);
  overflow-x: hidden;
}

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

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

/* a:hover {
  color: var(--color-primary-dark);
} */

ul,
ol {
  list-style: none;
}

/* ユーティリティクラス */
.u-mt-8 {
  margin-top: var(--space-sm);
}

.u-mt-16 {
  margin-top: var(--space-md);
}

.u-mt-24 {
  margin-top: var(--space-lg);
}

.u-mt-32 {
  margin-top: var(--space-xl);
}

.u-mt-48 {
  margin-top: var(--space-xxl);
}

/* レイアウト */
.section {
  padding: var(--space-xxl) 0;
  position: relative;
  overflow: hidden;
}

.section--gray {
  background-color: var(--color-background-gray);
}

.section--gradient {
  background: linear-gradient(to bottom, var(--color-primary-light), var(--color-background));
}

.section__container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  position: relative;
  z-index: 2;
}

.section__container--narrow {
  max-width: var(--container-width-narrow);
}

.section__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-extrabold);
  text-align: center;
  margin-bottom: var(--space-xl);
  position: relative;
  display: inline-block;
  padding-bottom: var(--space-md);
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.section__title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 2px;
  opacity: 0.9;
}

.section__subtitle {
  text-align: center;
  font-size: var(--font-size-md);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* ヘッダー - 高級感のあるデザイン */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-normal);
  height: 80px;
}

.header__backdrop {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(215, 206, 199, 0.95) 100%);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
  border-bottom: 1px solid rgba(164, 120, 100, 0.1);
  pointer-events: none;
  opacity: 0.92;
  transition: all var(--transition-normal);
}

.header.scrolled .header__backdrop {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 20px rgba(44, 40, 36, 0.06);
  opacity: 1;
}

.header__grid {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  position: relative;
  height: 80px;
  transition: height var(--transition-normal);
}

.header.scrolled .header__grid {
  height: 64px;
}

.header__logo-container {
  display: flex;
  align-items: center;
  position: relative;
  z-index: 5;
}

.header__logo {
  position: relative;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--space-sm);
  transition: all 0.5s var(--transition-bounce);
}

.header__logo-text {
  position: relative;
  z-index: 3;
  color: white;
  font-weight: 800;
  font-size: 24px;
  transition: all 0.4s ease;
}

.header__logo-circle {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  z-index: 1;
  transition: all 0.6s var(--transition-bounce);
  transform-origin: center;
}

.header__logo-square {
  position: absolute;
  width: 60%;
  height: 60%;
  background: var(--color-primary-dark);
  border-radius: 4px;
  z-index: 2;
  opacity: 0.3;
  transform: rotate(45deg) scale(0.8);
  transition: all 0.7s var(--transition-bounce);
  transform-origin: center;
}

.header__logo:hover .header__logo-circle {
  transform: scale(1.15);
}

.header__logo:hover .header__logo-square {
  transform: rotate(135deg) scale(0.9);
  opacity: 0.6;
}

.header__title {
  font-family: var(--font-family-heading);
  font-weight: 700;
  font-size: var(--font-size-lg);
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--color-primary) 10%, var(--color-primary-dark) 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-right: var(--space-xs);
  position: relative;
  transition: font-size var(--transition-normal);
}

.header__tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  opacity: 1;
  transform: translateY(0);
  transition: all var(--transition-normal);
}

.header.scrolled .header__tagline {
  opacity: 0;
  transform: translateY(-8px);
}

.header.scrolled .header__title {
  font-size: calc(var(--font-size-lg) - 4px);
}

.header.scrolled .header__logo {
  transform: scale(0.8);
}

.header__nav {
  justify-self: center;
  position: relative;
  z-index: 5;
}

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

.header__nav-item {
  position: relative;
  perspective: 800px;
}

.header__nav-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--transition-normal);
  position: relative;
  padding: var(--space-xs) 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.header__nav-icon {
  font-size: 8px;
  color: var(--color-primary);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateX(-8px);
}

.header__nav-text {
  position: relative;
  transition: all var(--transition-normal);
}

.header__nav-arrow {
  margin-left: 4px;
  transition: transform 0.3s ease;
}

.header__nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  transition: width 0.4s var(--transition-bounce), opacity 0.3s ease;
  opacity: 0;
}

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

.header__nav-link:hover .header__nav-icon {
  opacity: 1;
  transform: translateX(0);
}

.header__nav-link:hover::after {
  width: 100%;
  opacity: 1;
}

.header__nav-link:hover .header__nav-arrow {
  transform: translateX(4px);
}

.header__nav-item--highlight .header__nav-link {
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(164, 120, 100, 0.25);
  transition: all var(--transition-normal);
}

.header__nav-item--highlight .header__nav-link.active {
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(164, 120, 100, 0.25);
  transition: all var(--transition-normal);
}

.header__nav-item--highlight .header__nav-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(164, 120, 100, 0.3);
}

.header__nav-item--highlight .header__nav-link::after {
  display: none;
}

/* アクティブなナビゲーション項目 */
.header__nav-link.active {
  color: var(--color-primary);
}

.header__nav-link.active .header__nav-icon {
  opacity: 1;
  transform: translateX(0);
}

.header__nav-link.active::after {
  width: 100%;
  opacity: 1;
}

.header__actions {
  display: flex;
  align-items: center;
  justify-self: end;
  position: relative;
  z-index: 5;
}

.header__menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  position: relative;
  width: 40px;
  height: 40px;
  z-index: 1001;
}

.header__menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  margin: 5px 0;
  transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
}

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

.header__menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
  background-color: var(--color-primary);
}

.header__menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.header__menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
  background-color: var(--color-primary);
}

/* メディアクエリ - レスポンシブ対応 */
@media (max-width: 1024px) {
  .header__grid {
    grid-template-columns: auto 1fr auto;
    gap: var(--space-md);
  }

  .header__nav {
    justify-self: end;
  }

  .header__tagline {
    display: none;
  }
}

@media (max-width: 768px) {
  .header__nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    max-height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding-top: 100px;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 999;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
  }

  .header__nav.active {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }

  .header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xl);
  }

  .header__nav-item {
    width: 100%;
  }

  .header__nav-link {
    font-size: var(--font-size-md);
    padding: var(--space-sm) 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
  }

  .header__nav-icon {
    display: inline-block;
    font-size: 12px;
    opacity: 1;
    transform: translateX(0);
  }

  .header__menu-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1001;
  }

  .header__nav-item--highlight {
    margin-top: var(--space-md);
  }

  .header__nav-item--highlight .header__nav-link {
    width: 100%;
    text-align: center;
    justify-content: center;
    padding: var(--space-md);
  }
}

/* ヒーロー */
.hero {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-background) 100%);
  padding: clamp(100px, 10vw, 160px) 0 var(--space-xxxl);
  padding-top: 160px;
  position: relative;
  overflow: hidden;
  margin-top: 0;
  min-height: clamp(500px, 70vh, 90vh);
  display: flex;
  align-items: center;
}

.hero__container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-lg), 4vw, var(--space-xxl));
  position: relative;
  z-index: 2;
}

.hero__content {
  padding-top: var(--space-xl);
  position: relative;
}

.hero__title {
  font-size: clamp(var(--font-size-xl), 4vw, calc(var(--font-size-xxl) * 1.2));
  font-weight: 800;
  margin-bottom: var(--space-xl);
  line-height: 1.1;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero__title-line {
  display: block;
  margin-bottom: 8px;
  color: var(--color-text);
}

.hero__title-highlight {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  font-size: clamp(calc(var(--font-size-xl) * 1.2), 5vw, calc(var(--font-size-xxl) * 1.5));
  margin-top: 8px;
}

.hero__title-highlight::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 8px;
  bottom: 8px;
  left: 0;
  background: linear-gradient(90deg, var(--color-primary-light), rgba(215, 206, 199, 0.1));
  z-index: -1;
  border-radius: 4px;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  max-width: 100%;
  line-height: 1.6;
}

.hero__br-sp {
  display: none;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.hero__link {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  color: var(--color-primary);
  transition: all var(--transition-normal);
}

.hero__link-arrow {
  margin-left: var(--space-xs);
  transition: transform var(--transition-normal);
}

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

.hero__link:hover .hero__link-arrow {
  transform: translateX(4px);
}

.hero__stats {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-xxl);
  position: relative;
}

.hero__stats::before {
  content: "";
  position: absolute;
  top: -16px;
  left: 0;
  width: 40px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
  border-radius: 2px;
}

.hero__stat {
  display: flex;
  flex-direction: column;
}

.hero__stat-number {
  font-size: calc(var(--font-size-xl) * 1.2);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  font-family: var(--font-family-heading);
}

.hero__stat-plus,
.hero__stat-percent {
  font-size: var(--font-size-lg);
  vertical-align: super;
  margin-left: 2px;
}

.hero__stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: var(--space-xs);
}

.hero__image-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__image-wrapper {
  position: relative;
  width: 100%;
  max-width: 500px;
  z-index: 2;
}

.hero__image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
  transition: transform 0.5s ease-out;
  filter: saturate(1.05) brightness(1.02);
}

.hero__image-wrapper:hover .hero__image {
  transform: perspective(1000px) rotateY(-2deg) rotateX(2deg);
}

.hero__image-decoration {
  position: absolute;
  width: 85%;
  height: 85%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  top: 40px;
  right: -40px;
  z-index: -1;
  opacity: 0.15;
  filter: blur(15px);
  animation: float 6s ease-in-out infinite;
}

/* 装飾背景要素 */
.hero__shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
}

.hero__shape {
  position: absolute;
  opacity: 0.1;
  border-radius: 50%;
}

.hero__shape--1 {
  width: 300px;
  height: 300px;
  background: var(--color-primary);
  top: -100px;
  left: 10%;
  filter: blur(50px);
  animation: float 8s ease-in-out infinite;
}

.hero__shape--2 {
  width: 200px;
  height: 200px;
  background: var(--color-secondary);
  bottom: -50px;
  right: 10%;
  filter: blur(40px);
  animation: float 10s ease-in-out infinite alternate;
}

.hero__shape--3 {
  width: 150px;
  height: 150px;
  border: 30px solid var(--color-primary);
  top: 30%;
  right: 5%;
  opacity: 0.05;
  animation: rotate 20s linear infinite;
}

.hero__shape--4 {
  width: 100px;
  height: 100px;
  border: 20px solid var(--color-secondary);
  bottom: 20%;
  left: 5%;
  opacity: 0.05;
  animation: rotate 15s linear infinite reverse;
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-20px);
  }

  100% {
    transform: translateY(0px);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/********************************
レスポンシブスタイル
 ********************************/
@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .hero__image-wrapper {
    max-width: 400px;
  }

  .hero__title {
    font-size: calc(var(--font-size-xl) * 1.2);
  }

  .hero__title-highlight {
    font-size: calc(var(--font-size-xl) * 1.4);
  }

  .hero__subtitle {
    font-size: var(--font-size-md);
  }

  .header__contact-btn {
    display: none;
  }

  .nav-item-contact {
    display: block;
  }
}

@media (max-width: 768px) {
  .hero {
    padding-top: 120px;
    min-height: auto;
  }

  .hero__container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .hero__content {
    text-align: center;
    padding-top: 0;
  }

  .hero__title {
    align-items: center;
    font-size: var(--font-size-xl);
  }

  .hero__title-highlight {
    font-size: calc(var(--font-size-xl) * 1.2);
  }

  .hero__subtitle {
    font-size: var(--font-size-md);
    margin-left: auto;
    margin-right: auto;
  }

  .hero__br-sp {
    display: inline;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__stats {
    justify-content: center;
  }

  .hero__stats::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .hero__image-container {
    order: -1;
  }

  .hero__image-wrapper {
    max-width: 350px;
  }

  .header__nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-background);
    padding-top: 80px;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
    box-shadow: var(--shadow-md);
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }

  .header__nav.active {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }

  .header__nav-list {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .header__nav-item {
    margin-left: 0;
    margin-bottom: var(--space-lg);
    width: 100%;
    text-align: center;
  }

  .header__nav-link {
    display: block;
    padding: var(--space-md) 0;
    font-size: calc(var(--font-size-base) * 1.2);
    font-weight: 700;
  }

  .header__menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

  .header__menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
  }

  .header__menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .header__menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
  }

  .hero__image-wrapper {
    max-width: 350px;
  }
}

/* モバイル表示時の調整 */
@media (max-width: 480px) {
  .hero {
    padding: 100px 0 var(--space-xl);
  }

  .hero__title {
    font-size: var(--font-size-lg);
  }

  .hero__title-highlight {
    font-size: calc(var(--font-size-lg) * 1.2);
  }

  .hero__subtitle {
    font-size: var(--font-size-base);
  }

  .hero__actions {
    flex-direction: column;
    gap: var(--space-md);
  }

  .hero__image-wrapper {
    max-width: 280px;
  }

  .hero__image-decoration {
    top: 20px;
    right: -20px;
  }

  /* ナビゲーションの微調整 */
  .header__nav-link {
    font-size: var(--font-size-base);
    padding: var(--space-sm) 0;
  }

  /* フォームのボタン調整 */
  .btn--submit {
    min-width: 100%;
    margin-top: var(--space-md);
  }

  /* FAQの余白調整 */
  .faq-question {
    padding: var(--space-md) var(--space-md);
  }

  .faq-answer {
    padding: 0 var(--space-md);
  }
}

/* ボタン */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
  z-index: 1;
  min-height: 2.75rem;
}

.btn::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  transition: height var(--transition-normal);
  z-index: -1;
}

.btn:hover::after {
  height: 100%;
}

.btn--primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: 0 4px 6px rgba(164, 120, 100, 0.25);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(164, 120, 100, 0.3);
}

.btn--outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background-color: transparent;
}

.btn--outline:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

/* 送信ボタンのアニメーション */
.btn-spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  margin-left: 8px;
  vertical-align: middle;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* サービスカード */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.service-card {
  background-color: var(--color-background);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-lg);
}

.service-card:hover::before {
  opacity: 1;
}

.service-card__icon {
  width: 96px;
  height: 96px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-primary-light);
  overflow: hidden;
  transition: transform var(--transition-bounce) 0.4s;
}

.service-card:hover .service-card__icon {
  transform: scale(1.1) rotate(5deg);
}

.service-card__icon img {
  border-radius: 50%;
}

.service-card__title {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-sm);
  font-weight: 600;
}

.service-card__text {
  color: var(--color-text-light);
}

/* 制作実績 */
.works {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.work-card {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.work-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.05) 0%, rgba(0, 0, 0, 0) 50%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.work-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-lg);
}

.work-card:hover::after {
  opacity: 1;
}

.work-card__image {
  height: 220px;
  overflow: hidden;
  position: relative;
}

.work-card__image::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-primary);
  opacity: 0;
  z-index: 1;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.work-card:hover .work-card__image::before {
  opacity: 0.1;
}

.work-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.work-card:hover .work-card__image img {
  transform: scale(1.08);
}

.work-card__content {
  padding: var(--space-lg) var(--space-lg) var(--space-md);
}

.work-card__title {
  font-size: var(--font-size-md);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.work-card__text {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

/* 制作実績スライダー */
.works-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: var(--space-md) 0;
  margin-bottom: var(--space-xl);
}

.slide {
  display: flex;
  gap: var(--space-md);
  transition: transform 0.5s ease;
  width: 100%;
}

.slide.sliding {
  transition: transform 0.5s ease;
}

.work-card {
  flex: 0 0 calc(33.333% - var(--space-md));
  max-width: calc(33.333% - var(--space-md));
  margin: 0;
  perspective: 1000px;
}

.sliding-in-left {
  animation: slideInLeft 0.5s ease forwards;
}

.sliding-in-right {
  animation: slideInRight 0.5s ease forwards;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-100%) rotateY(-10deg);
  }

  to {
    opacity: 1;
    transform: translateX(0) rotateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%) rotateY(10deg);
  }

  to {
    opacity: 1;
    transform: translateX(0) rotateY(0);
  }
}

.slider-controls {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  padding: 0 var(--space-md);
  z-index: 30;
}

.slider-control {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.9);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  color: var(--color-primary);
  pointer-events: auto;
  opacity: 0.7;
}

.slider-control svg {
  width: 24px;
  height: 24px;
}

.slider-control:hover {
  background-color: var(--color-primary);
  color: white;
  transform: scale(1.1);
}

.slider-control:active {
  transform: scale(0.95);
}

.works-link {
  text-align: center;
  margin-top: var(--space-xl);
}

/* モバイル対応 */
@media (max-width: 1024px) {
  .work-card {
    flex: 0 0 calc(50% - var(--space-md));
    max-width: calc(50% - var(--space-md));
  }
}

@media (max-width: 768px) {
  .work-card {
    flex: 0 0 calc(100% - var(--space-md));
    max-width: calc(100% - var(--space-md));
  }
}

/* 料金プラン */
.pricing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var (--space-xl);
  margin: var(--space-xl) 0;
}

.pricing-card {
  background-color: var(--color-background);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  border: 1px solid var(--color-border);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.pricing-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-lg);
}

.pricing-card--featured {
  border: none;
  background: linear-gradient(white, white) padding-box,
    linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)) border-box;
  transform: scale(1.05);
  z-index: 99;
}

.pricing-card__tag {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background-color: var(--color-primary-dark);
  color: white;
  font-size: var(--font-size-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-weight: 700;
}

.pricing-card__header {
  background-color: var(--color-background);
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  position: relative;
}

.pricing-card--featured .pricing-card__header {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-background) 100%);
}

.pricing-card__title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.pricing-card__price {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var (--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.pricing-card__currency {
  font-size: var(--font-size-md);
  font-weight: 400;
  color: var(--color-text-light);
}

.pricing-card__initial-fee {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: var(--space-xs);
}

.pricing-card__content {
  padding: var(--space-xl);
}

.pricing-card__features {
  margin-bottom: var(--space-xl);
}

.pricing-card__feature {
  padding: var(--space-xs) 0;
  position: relative;
  padding-left: var(--space-lg);
  transition: all var(--transition-normal);
}

.pricing-card__feature::before {
  content: "✓";
  color: var(--color-primary);
  position: absolute;
  left: 0;
}

.pricing-card__feature--disabled {
  color: var(--color-text-light);
  text-decoration: line-through;
}

.pricing-card__feature--disabled::before {
  content: "×";
  color: var(--color-text-light);
}

.pricing-card__note {
  font-size: var(--font-size-xs);
  margin-top: var(--space-md);
  color: var(--color-text-light);
  text-align: center;
}

/* フッター */
.footer {
  background-color: var(--color-primary-dark);
  color: white;
  padding: var(--space-xxl) 0 var(--space-md);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

.footer::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at 10% 30%, rgba(164, 120, 100, 0.1) 0%, rgba(75, 56, 50, 0) 50%);
  pointer-events: none;
}

.footer__container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  position: relative;
  z-index: 2;
}

.footer__info {
  flex: 1;
  min-width: 280px;
  margin-bottom: var(--space-xl);
}

.footer__title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
  position: relative;
  display: inline-block;
  font-weight: var(--font-weight-bold);
}

.footer__title::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}

.footer__address {
  font-style: normal;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.footer__nav {
  flex: 1;
  min-width: 280px;
}

.footer__nav-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-md);
}

.footer__nav-link {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  padding: var(--space-xs) 0;
  display: inline-block;
  position: relative;
}

.footer__nav-link::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

.footer__nav-link:hover {
  color: white;
}

.footer__nav-link:hover::before {
  width: 100%;
}

.footer__bottom {
  max-width: var(--container-width);
  margin: var(--space-xl) auto 0;
  padding: var(--space-md) var(--space-md) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  position: relative;
  z-index: 2;
}

.footer__copyright {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-size-xs);
}

/* FAQ部分のスタイル修正 */
.faq-item {
  margin-bottom: var(--space-md);
  background-color: var(--color-background);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border);
}

.faq-question {
  position: relative;
  padding: var(--space-lg) var(--space-xl);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-normal);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-question::after {
  content: "";
  display: none;
  /* SVGアイコンを使用するため無効化 */
}

.faq-item--active .faq-question {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding-bottom: var(--space-md);
}

.faq-item--active .faq-question::after {
  content: "";
  display: none;
  /* SVGアイコンを使用するため無効化 */
}

.faq-answer {
  padding: 0 var(--space-xl);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  color: var(--color-text-light);
  opacity: 0.8;
  line-height: 1.6;
}

.faq-item--active .faq-answer {
  padding-bottom: var(--space-xl);
  max-height: 1000px;
}

/* FAQ アイコンスタイル */
.faq-toggle-icon {
  margin-left: auto;
  transition: transform var(--transition-normal);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-item--active .faq-toggle-icon {
  transform: rotate(180deg);
}

/* サイドリンク */
.side-links {
  position: fixed;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.side-links__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.side-links__item {
  transition: transform var(--transition-normal);
}

.side-links__item:hover {
  transform: translateY(-4px);
}

.side-links__link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-background);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.side-links__link img {
  width: 24px;
  height: 24px;
}

/* お問い合わせリンク専用スタイル */
.side-links__link--contact {
  background-color: var(--color-primary);
  color: white;
  width: 48px;
  height: auto;
  padding: var(--space-md) var(--space-xs);
  border-radius: var(--radius-lg);
  flex-direction: column;
}

.side-links__link--contact:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-4px);
}

.side-links__icon--contact {
  display: block;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M21 11.5a8.38 8.38 0 0 1-.9 3.8 8.5 8.5 0 0 1-7.6 4.7 8.38 8.38 0 0 1-3.8-.9L3 21l1.9-5.7a8.38 8.38 0 0 1-.9-3.8 8.5 8.5 0 0 1 4.7-7.6 8.38 8.38 0 0 1 3.8-.9h.5a8.48 8.48 0 0 1 8 8v.5z'%3E%3C/path%3E%3C/svg%3E");
  width: 24px;
  height: 24px;
  background-size: contain;
  background-repeat: no-repeat;
  margin-bottom: var(--space-xs);
}

.side-links__text {
  writing-mode: vertical-rl;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin: 0;
  white-space: nowrap;
  display: block;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .side-links {
    top: auto;
    bottom: var(--space-md);
    right: var(--space-md);
    transform: none;
  }

  .side-links__list {
    flex-direction: row;
  }

  .side-links__link--contact {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 50%;
  }

  .side-links__text {
    display: none;
  }

  .side-links__icon--contact {
    margin-bottom: 0;
  }
}

/* フッターエラー表示用スタイル */
.footer__error {
  background-color: #111827;
  color: white;
  text-align: center;
  padding: var(--space-md);
  width: 100%;
}

/* echoAPI失敗時のコンソールエラーを抑えるためのヘルパースタイル */
.api-loading {
  position: relative;
}

.api-loading::after {
  content: "読み込み中...";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(255, 255, 255, 0.8);
  padding: var(--space-sm) var (--space-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* フッターエラー表示用スタイル */
.footer__error {
  background-color: #111827;
  color: white;
  text-align: center;
  padding: var(--space-md);
  width: 100%;
}

/* 制作実績ショーケース - 改良版レイアウト */
.works-showcase {
  width: 100%;
  max-width: var(--container-width);
  overflow: hidden;
  position: relative;
  margin-bottom: var(--space-xl);
  padding: clamp(var(--space-lg), 5vw, var(--space-xxl)) 0;
}

.works-slider {
  position: relative;
  width: 100%;
  min-height: clamp(300px, 50vw, 500px);
  perspective: 1000px;
  transform-style: preserve-3d;
}

.work-item {
  width: 100%;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.5s ease, transform 0.5s ease, visibility 0s 0.5s;
  backface-visibility: hidden;
  will-change: transform, opacity;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.work-item.visible {
  visibility: visible;
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.5s ease, transform 0.5s ease;
  position: relative;
  z-index: 2;
}

.work-item__desktop {
  flex: 1;
  position: relative;
  margin-right: clamp(var(--space-md), 3vw, var(--space-xl));
  min-height: clamp(250px, 40vw, 350px);
}

.work-item__desktop-frame {
  position: relative;
  padding: var(--space-sm);
  background-color: var(--color-background);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform-style: preserve-3d;
  transform: perspective(1000px) rotateY(-5deg);
  transition: transform 0.5s ease;
  min-height: clamp(200px, 35vw, 300px);
}

.work-item__desktop-frame img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
  transition: transform 0.3s ease;
  min-height: clamp(180px, 30vw, 280px);
  background-color: var(--color-background-light);
}

.work-item__desktop-frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: var(--space-sm);
  background-color: var(--color-background-gray);
  border-top-left-radius: var (--radius-md);
  border-top-right-radius: var(--radius-md);
  display: flex;
  align-items: center;
  padding: 0 var(--space-xs);
  z-index: 2;
}

.work-item__desktop-frame::after {
  content: "• • •";
  position: absolute;
  top: 2px;
  left: var(--space-xs);
  font-size: 20px;
  letter-spacing: -1px;
  color: rgba(0, 0, 0, 0.3);
  z-index: 2;
}

.work-item__info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.6) 50%, rgba(0, 0, 0, 0) 100%);
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
  color: white;
  border-bottom-left-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
  z-index: 1;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.work-item:hover .work-item__info {
  opacity: 1;
  transform: translateY(0);
}

.work-item__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
  color: white;
}

.work-item__text {
  font-size: var(--font-size-base);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.work-item__tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
}

.work-item__mobile {
  flex: 0 0 auto;
  position: relative;
  margin-left: -100px;
  z-index: 5;
  transform: translateY(20px);
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.15));
}

.work-item__mobile-frame {
  position: relative;
  width: clamp(140px, 20vw, 220px);
  border: clamp(4px, 0.5vw, 8px) solid #111;
  border-radius: 24px;
  overflow: hidden;
  transform: rotate(3deg);
  transition: transform 0.3s ease;
  min-height: clamp(220px, 40vw, 320px);
}

.work-item__mobile-frame img {
  width: 100%;
  height: auto;
  display: block;
  transform: scale(1);
  transition: transform 0.3s ease;
  min-height: clamp(200px, 35vw, 300px);
  background-color: var(--color-background-light);
}

.work-item__mobile-frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 20px;
  background-color: #111;
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
  z-index: 2;
}

.work-item:hover .work-item__desktop-frame {
  transform: perspective(1000px) rotateY(0deg);
}

.work-item:hover .work-item__mobile-frame {
  transform: rotate(0deg);
}

.work-item:hover .work-item__desktop-frame img,
.work-item:hover .work-item__mobile-frame img {
  transform: scale(1.03);
}

.slider-controls {
  position: absolute;
  top: 50%;
  left: -24px;
  right: -24px;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  z-index: 100;
  /* z-indexを上げて最前面に */
}

.slider-control {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  color: var(--color-primary);
  pointer-events: auto;
  opacity: 0.8;
  position: relative;
  /* 位置指定を相対位置に */
  z-index: 101;
  /* z-indexを上げて最前面に */
}

.slider-control:hover {
  background-color: var(--color-primary);
  color: white;
  transform: scale(1.1);
  opacity: 1;
}

.slider-control:active {
  transform: scale(0.95);
}

.slider-control svg {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
}

.slider-control--prev:hover svg {
  transform: translateX(-2px);
}

.slider-control--next:hover svg {
  transform: translateX(2px);
}

.slider-pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-xl);
}

.slider-pagination__dot {
  width: 30px;
  height: 4px;
  background-color: var(--color-border);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.slider-pagination__dot::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background-color: var(--color-primary);
  transition: width 5s linear;
}

.slider-pagination__dot--active {
  background-color: var(--color-primary-light);
}

.slider-pagination__dot--active::after {
  width: 100%;
}

.slider-pagination__dot:hover {
  background-color: var(--color-primary-light);
  transform: scaleY(1.5);
}

.slider-progress {
  position: absolute;
  bottom: -20px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
  z-index: 5;
  transition-property: width;
  transition-timing-function: linear;
}

.lazy-image {
  position: relative;
  background-color: var(--color-background-light);
  transition: background-color 0.3s ease;
}

.lazy-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg,
      transparent 0%,
      rgba(255, 255, 255, 0.6) 50%,
      transparent 100%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
  will-change: transform;
}

.loaded-image::before {
  display: none;
}

@keyframes shimmer {
  to {
    background-position: 200% 0;
  }
}

@media (max-width: 992px) {
  .work-item {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  .work-item__desktop {
    width: 100%;
    margin-right: 0;
    margin-bottom: clamp(60px, 10vw, 100px);
  }

  .work-item__info {
    padding: var(--space-lg) var(--space-md) var(--space-md);
  }

  .work-item__mobile {
    margin-left: 0;
    margin-top: -120px;
    transform: translateY(0) translateX(80px);
  }
}

@media (max-width: 480px) {
  .work-item__desktop {
    min-height: 250px;
  }

  .work-item__desktop-frame {
    min-height: 220px;
  }

  .work-item__desktop-frame img {
    min-height: 200px;
  }

  .work-item__mobile-frame {
    width: 140px;
    border-width: 6px;
    min-height: 220px;
  }

  .work-item__mobile-frame img {
    min-height: 200px;
  }

  .work-item__mobile {
    margin-top: -80px;
    transform: translateY(0) translateX(40px);
  }

  .work-item__info {
    padding: var(--space-md);
  }

  .work-item__text {
    display: none;
  }
}

/* コンタクトページのヘッダースタイル */
.page-header {
  padding: clamp(80px, 10vw, 120px) 0 var(--space-xl);
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-background) 100%);
  text-align: center;
  margin-bottom: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-header--contact {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-background) 80%);
}

.page-header__container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  position: relative;
  z-index: 2;
}

.page-header__title {
  font-family: var(--font-family-heading);
  font-size: clamp(var(--font-size-xl), 5vw, calc(var(--font-size-xxl) * 0.8));
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.page-header__subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* コンタクトフォームスタイル */
.contact-form-container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--color-background);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.contact-intro {
  padding: var(--space-xl);
  background-color: var(--color-primary-light);
  border-bottom: 1px solid rgba(164, 120, 100, 0.1);
  text-align: center;
  color: var(--color-text);
}

.contact-form {
  padding: var(--space-xl);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.form-input-container {
  position: relative;
  display: flex;
  align-items: center;
  border-radius: var (--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-background);
  transition: all var(--transition-normal);
}

.form-input-container--active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(164, 120, 100, 0.25);
}

.form-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-sm);
  color: var(--color-text-light);
}

.form-input {
  width: 100%;
  padding: var(--space-md);
  border: none;
  background: transparent;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  color: var(--color-text);
  outline: none;
}

.form-input--error {
  border-color: var(--color-error);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
}

.form-warnings {
  margin-top: var(--space-xs);
}

.form-warning {
  color: #B8860B;
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-xs);
  padding: var(--space-xs);
  background-color: #FFF8DC;
  border-radius: var(--border-radius-sm);
  border-left: 3px solid #DAA520;
}

.form-submit {
  text-align: center;
  margin-top: var(--space-xl);
}

.btn--submit {
  min-width: 200px;
}

.required {
  color: var(--color-error);
  margin-left: 4px;
}

.form-message {
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  text-align: center;
}

.form-message--success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var (--color-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-message--error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* コンタクト方法スタイル */
.contact-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.contact-method {
  background-color: var(--color-background);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.contact-method:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.contact-method__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-light);
  border-radius: 50%;
  color: var(--color-primary);
}

.contact-method__icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--color-primary);
}

.contact-method__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.contact-method__info {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.contact-method__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* トップページへ戻るボタン */
.back-to-top {
  display: inline-block;
  margin: var(--space-xl) auto;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-background);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

.back-to-top:hover {
  background-color: var(--color-primary);
  color: white;
}

/* スキル・技術セクション */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xxxl);
}

.skill-category {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.skill-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
  transform-origin: left;
}

.skill-category:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.skill-category:hover::before {
  transform: scaleX(1);
}

.skill-category__icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: white;
  transition: all var(--transition-normal);
}

.skill-category__icon svg {
  width: 24px;
  height: 24px;
}

.skill-category:hover .skill-category__icon {
  transform: scale(1.1) rotate(5deg);
}

.skill-category__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-md);
  font-family: var(--font-family-heading);
}

.skill-category__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-category__list li {
  padding: var(--space-sm) 0;
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  padding-left: var(--space-lg);
  transition: all var(--transition-normal);
}

.skill-category__list li:last-child {
  border-bottom: none;
}

.skill-category__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  opacity: 0.7;
  transition: all var(--transition-normal);
}

.skill-category__list li:hover {
  color: var(--color-primary);
  padding-left: calc(var(--space-lg) + 4px);
}

.skill-category__list li:hover::before {
  opacity: 1;
  transform: scale(1.2);
}

/* スキルのコミットメント */
.skills-commitment {
  margin: var(--space-xxxl) 0;
  text-align: center;
}

.skills-commitment h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-xl);
  font-family: var(--font-family-heading);
}

.commitment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.commitment-item {
  background: var(--color-background-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

.commitment-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.commitment-item__number {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  font-family: var(--font-family-heading);
  margin-bottom: var(--space-md);
  position: relative;
}

.commitment-item__number::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--color-primary);
}

.commitment-item h4 {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  font-family: var(--font-family-heading);
}

.commitment-item p {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  line-height: 1.6;
}

/* スキルCTA */
.skills-cta {
  text-align: center;
  margin-top: var(--space-xxxl);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .skill-category {
    padding: var(--space-lg);
  }

  .commitment-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .commitment-item {
    padding: var(--space-lg);
  }

  .skills-commitment h3 {
    font-size: var(--font-size-lg);
  }
}

@media (max-width: 480px) {
  .skill-category {
    padding: var(--space-md);
  }

  .skill-category__icon {
    width: 40px;
    height: 40px;
  }

  .skill-category__icon svg {
    width: 20px;
    height: 20px;
  }

  .commitment-item {
    padding: var(--space-md);
  }
}

/* レート制限通知用スタイル */
.rate-limit-notice {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  padding: var(--space-sm);
  background-color: #FFF3CD;
  border: 1px solid #FFEAA7;
  border-radius: var(--border-radius-sm);
  color: #856404;
  font-size: var(--font-size-sm);
  text-align: center;
}

.rate-limit-notice svg {
  color: #F39C12;
  flex-shrink: 0;
}

.btn--submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}