/* ========================================
   変数定義 (ブランドカラー)
   ======================================== */
:root {
    /* テキスト/背景色 */
    --color-text-dark-1: #2C3E50;
    --color-text-dark-2: #5A6C7D;
    --color-bg-light-1: #FAF9F6;
    --color-bg-light-2: #E6EBEF;
    
    /* アクセントカラー */
    --color-accent-1: #D7B56D; /* Light Gold */
    --color-accent-2: #91A6BA; /* Blue Gray */
    --color-accent-3: #8CA5A0;
    --color-accent-4: #C8A97E;
    --color-accent-5: #A68B7C;
    --color-accent-6: #E1E1E1;
    
    /* フォント */
    --font-sans: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* コンテナ幅 */
    --container-width: 1200px;
    --container-padding: 20px;
    
    /* トランジション */
    --transition-base: 0.3s ease;
}

/* ========================================
   リセット & ベーススタイル
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text-dark-1);
    background-color: var(--color-bg-light-1);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ========================================
   レイアウト
   ======================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--color-accent-1);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-dark-2);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   ヘッダー
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(250, 249, 246, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(90, 108, 125, 0.1);
    transition: var(--transition-base);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon svg {
    display: block;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-dark-2);
    letter-spacing: 0.05em;
}

.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-list a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-dark-2);
    position: relative;
    padding: 0.5rem 0;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent-1);
    transition: width var(--transition-base);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 28px;
    height: 2px;
    background-color: var(--color-text-dark-2);
    transition: var(--transition-base);
}

/* モバイルメニュー */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg-light-1);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-menu.active {
    display: flex;
    opacity: 1;
}

.mobile-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.mobile-nav-list {
    text-align: center;
}

.mobile-nav-list li {
    margin: 2rem 0;
}

.mobile-nav-list a {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text-dark-1);
}

/* ========================================
   ヒーローセクション
   ======================================== */
.hero {
    padding-top: calc(80px + var(--spacing-xl));
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-light-1) 0%, var(--color-bg-light-2) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background-color: rgba(215, 181, 109, 0.15);
    color: var(--color-accent-1);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(215, 181, 109, 0.3);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-md);
}

.hero-title .highlight {
    color: var(--color-accent-1);
    position: relative;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-dark-2);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ヒーロービジュアル */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.circles-animation {
    position: relative;
    width: 400px;
    height: 400px;
}

.circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 2px solid;
    animation: pulse 4s ease-in-out infinite;
}

.circle-1 {
    width: 350px;
    height: 350px;
    border-color: var(--color-text-dark-2);
    animation-delay: 0s;
}

.circle-2 {
    width: 270px;
    height: 270px;
    border-color: var(--color-text-dark-2);
    border-width: 2px;
    animation-delay: 0.5s;
}

.circle-3 {
    width: 190px;
    height: 190px;
    border-color: var(--color-accent-2);
    animation-delay: 1s;
}

.circle-4 {
    width: 110px;
    height: 110px;
    border-color: var(--color-accent-2);
    border-width: 1.5px;
    animation-delay: 1.5s;
}

.circle-core {
    width: 60px;
    height: 60px;
    background-color: var(--color-accent-1);
    border: none;
    animation: glow 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.7;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.05);
        opacity: 1;
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(215, 181, 109, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(215, 181, 109, 0.6);
    }
}

/* ========================================
   ボタン
   ======================================== */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition-base);
    text-align: center;
}

.btn-primary {
    background-color: var(--color-accent-1);
    color: white;
    box-shadow: 0 4px 15px rgba(215, 181, 109, 0.3);
}

.btn-primary:hover {
    background-color: #c9a55e;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(215, 181, 109, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-dark-2);
    border: 2px solid var(--color-text-dark-2);
}

.btn-secondary:hover {
    background-color: var(--color-text-dark-2);
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

/* ========================================
   Aboutセクション
   ======================================== */
.about {
    background-color: white;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-lead {
    font-size: 1.25rem;
    line-height: 2;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-dark-1);
}

.about-lead strong {
    color: var(--color-accent-1);
    font-weight: 600;
}

.about-box {
    background: linear-gradient(135deg, rgba(230, 235, 239, 0.5) 0%, rgba(250, 249, 246, 0.5) 100%);
    border-left: 4px solid var(--color-accent-1);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-radius: 8px;
}

.about-box-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.about-box-text {
    font-size: 1.125rem;
    line-height: 1.9;
    margin-bottom: var(--spacing-sm);
}

.about-box-text:last-child {
    margin-bottom: 0;
}

.about-box-text strong {
    color: var(--color-accent-1);
    font-weight: 600;
}

.about-result {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    background-color: rgba(215, 181, 109, 0.08);
    padding: var(--spacing-md);
    border-radius: 12px;
}

.about-result-icon {
    flex-shrink: 0;
    font-size: 2.5rem;
    color: var(--color-accent-1);
}

.about-result-text h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-text-dark-1);
    margin: var(--spacing-sm) 0;
}

.about-result-text p {
    font-size: 1.125rem;
    color: var(--color-text-dark-2);
}

/* ========================================
   Whyセクション
   ======================================== */
.why {
    background: linear-gradient(to bottom, white 0%, var(--color-bg-light-2) 100%);
}

.why-story {
    max-width: 900px;
    margin: 0 auto;
}

.story-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    background-color: white;
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(90, 108, 125, 0.08);
}

.story-item:last-child {
    margin-bottom: 0;
}

.story-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent-1) 0%, var(--color-accent-4) 100%);
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
}

.story-content {
    flex: 1;
}

.story-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-md);
}

.story-text {
    font-size: 1.0625rem;
    line-height: 1.9;
    color: var(--color-text-dark-2);
    margin-bottom: var(--spacing-sm);
}

.story-quote {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-accent-1);
    padding: var(--spacing-sm) 0;
    margin: var(--spacing-md) 0;
    border-left: 3px solid var(--color-accent-1);
    padding-left: var(--spacing-md);
}

.story-insight {
    background-color: rgba(215, 181, 109, 0.1);
    padding: var(--spacing-md);
    border-radius: 8px;
    font-size: 1.125rem;
    line-height: 1.9;
    margin-top: var(--spacing-md);
}

.story-insight strong {
    color: var(--color-accent-1);
    font-weight: 600;
}

/* ========================================
   Methodセクション
   ======================================== */
.method {
    background-color: white;
}

.method-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.method-card {
    background: linear-gradient(135deg, rgba(230, 235, 239, 0.3) 0%, rgba(250, 249, 246, 0.3) 100%);
    padding: var(--spacing-md);
    border-radius: 12px;
    text-align: center;
    border: 2px solid transparent;
    transition: var(--transition-base);
}

.method-card:hover {
    border-color: var(--color-accent-2);
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(90, 108, 125, 0.15);
}

.method-card-core {
    grid-column: 1 / -1;
    max-width: 500px;
    margin: var(--spacing-md) auto 0;
    background: linear-gradient(135deg, rgba(215, 181, 109, 0.15) 0%, rgba(200, 169, 126, 0.15) 100%);
    border-color: var(--color-accent-1);
}

.method-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent-2);
    border-radius: 50%;
    color: white;
    font-size: 2rem;
}

.method-icon-core {
    background: linear-gradient(135deg, var(--color-accent-1) 0%, var(--color-accent-4) 100%);
}

.method-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-xs);
}

.method-subtitle {
    display: block;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-accent-1);
    margin-top: var(--spacing-xs);
}

.method-description {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-dark-2);
    margin-top: var(--spacing-md);
}

/* ========================================
   Servicesセクション
   ======================================== */
.services {
    background: linear-gradient(to bottom, white 0%, var(--color-bg-light-2) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    max-width: 1100px;
    margin: 0 auto;
}

.service-card {
    background-color: white;
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(90, 108, 125, 0.1);
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(90, 108, 125, 0.15);
}

.service-card-featured {
    border-color: var(--color-accent-1);
    position: relative;
}

.service-card-featured::before {
    content: 'おすすめ';
    position: absolute;
    top: -12px;
    right: 20px;
    background: linear-gradient(135deg, var(--color-accent-1) 0%, var(--color-accent-4) 100%);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.service-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: rgba(145, 166, 186, 0.15);
    color: var(--color-accent-2);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-xs);
}

.service-subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-dark-2);
    margin-bottom: var(--spacing-md);
}

.service-purpose,
.service-content,
.service-for {
    margin-bottom: var(--spacing-md);
}

.service-purpose h4,
.service-content h4,
.service-for h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-accent-1);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.service-purpose h4::before,
.service-content h4::before,
.service-for h4::before {
    content: '';
    width: 4px;
    height: 20px;
    background-color: var(--color-accent-1);
    border-radius: 2px;
}

.service-purpose p,
.service-for ul {
    font-size: 0.9375rem;
    line-height: 1.8;
    color: var(--color-text-dark-2);
}

.service-content ul,
.service-for ul {
    padding-left: 0;
}

.service-content ul li,
.service-for ul li {
    padding: 0.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9375rem;
    color: var(--color-text-dark-2);
}

.service-content ul li i {
    color: var(--color-accent-1);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

/* ========================================
   Valueセクション
   ======================================== */
.value {
    background-color: white;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.value-card {
    text-align: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(230, 235, 239, 0.3) 0%, rgba(250, 249, 246, 0.3) 100%);
    border-radius: 12px;
    transition: var(--transition-base);
}

.value-card:hover {
    background: linear-gradient(135deg, rgba(215, 181, 109, 0.1) 0%, rgba(250, 249, 246, 0.5) 100%);
    transform: translateY(-5px);
}

.value-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent-1);
    border-radius: 50%;
    color: white;
    font-size: 1.75rem;
}

.value-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-sm);
}

.value-description {
    font-size: 0.9375rem;
    line-height: 1.8;
    color: var(--color-text-dark-2);
}

/* ========================================
   Messageセクション
   ======================================== */
.message {
    background: linear-gradient(135deg, var(--color-bg-light-2) 0%, var(--color-bg-light-1) 100%);
}

.message-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.message-icon {
    margin-bottom: var(--spacing-md);
}

.message-icon svg {
    margin: 0 auto;
}

.message-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-lg);
}

.message-text {
    font-size: 1.125rem;
    line-height: 2;
    color: var(--color-text-dark-2);
}

.message-text p {
    margin-bottom: var(--spacing-md);
}

.message-text strong {
    color: var(--color-accent-1);
    font-weight: 600;
}

.message-highlight {
    font-family: var(--font-serif);
    font-size: 1.375rem;
    color: var(--color-text-dark-1);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: rgba(215, 181, 109, 0.1);
    border-radius: 8px;
    border-left: 4px solid var(--color-accent-1);
}

/* ========================================
   Contactセクション
   ======================================== */
.contact {
    background-color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-text-dark-2);
    margin-bottom: var(--spacing-md);
}

.contact-features {
    padding-left: 0;
}

.contact-features li {
    padding: 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
    color: var(--color-text-dark-2);
}

.contact-features i {
    color: var(--color-accent-1);
    flex-shrink: 0;
}

.contact-form-container {
    position: relative;
}

.contact-form {
    background-color: var(--color-bg-light-1);
    padding: var(--spacing-md);
    border-radius: 12px;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-text-dark-1);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9375rem;
}

.required {
    color: var(--color-accent-1);
    font-size: 0.75rem;
    margin-left: 0.5rem;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--color-bg-light-2);
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-text-dark-1);
    background-color: white;
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-2);
    box-shadow: 0 0 0 3px rgba(145, 166, 186, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-success {
    display: none;
    text-align: center;
    padding: var(--spacing-lg);
    background-color: rgba(140, 165, 160, 0.1);
    border-radius: 12px;
}

.form-success.active {
    display: block;
}

.form-success i {
    font-size: 3rem;
    color: var(--color-accent-3);
    margin-bottom: var(--spacing-md);
}

.form-success p {
    font-size: 1.125rem;
    color: var(--color-text-dark-1);
    line-height: 1.8;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--color-text-dark-1);
    color: var(--color-bg-light-1);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(250, 249, 246, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: var(--spacing-md);
}

.footer-logo-text {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-bg-light-1);
    letter-spacing: 0.05em;
}

.footer-tagline {
    font-size: 0.9375rem;
    line-height: 1.8;
    color: rgba(250, 249, 246, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-accent-1);
    margin-bottom: var(--spacing-md);
}

.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-column ul li a {
    color: rgba(250, 249, 246, 0.7);
    font-size: 0.9375rem;
    transition: var(--transition-base);
}

.footer-column ul li a:hover {
    color: var(--color-accent-1);
    padding-left: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: rgba(250, 249, 246, 0.5);
}

/* ========================================
   スクロールトップボタン
   ======================================== */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--color-accent-1);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    box-shadow: 0 4px 15px rgba(215, 181, 109, 0.3);
    z-index: 900;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: #c9a55e;
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(215, 181, 109, 0.4);
}

/* ========================================
   レスポンシブ対応
   ======================================== */
.sp-only {
    display: none;
}

/* タブレット */
@media (max-width: 1024px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .circles-animation {
        width: 300px;
        height: 300px;
    }
    
    .circle-1 {
        width: 280px;
        height: 280px;
    }
    
    .circle-2 {
        width: 210px;
        height: 210px;
    }
    
    .circle-3 {
        width: 140px;
        height: 140px;
    }
    
    .circle-4 {
        width: 80px;
        height: 80px;
    }
    
    .circle-core {
        width: 40px;
        height: 40px;
    }
    
    .method-grid {
        grid-template-columns: 1fr;
    }
    
    .method-card-core {
        grid-column: 1;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* モバイル */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2.5rem;
        --spacing-xl: 3rem;
        --container-padding: 16px;
    }
    
    .sp-only {
        display: inline;
    }
    
    /* ヘッダー */
    .nav {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    /* セクション */
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-description {
        font-size: 1rem;
    }
    
    /* ヒーロー */
    .hero {
        padding-top: calc(70px + var(--spacing-md));
    }
    
    .hero-title {
        font-size: 1.875rem;
    }
    
    .hero-subtitle {
        font-size: 1.0625rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .hero-visual {
        margin-top: var(--spacing-md);
    }
    
    .circles-animation {
        width: 250px;
        height: 250px;
    }
    
    .circle-1 {
        width: 220px;
        height: 220px;
    }
    
    .circle-2 {
        width: 170px;
        height: 170px;
    }
    
    .circle-3 {
        width: 120px;
        height: 120px;
    }
    
    .circle-4 {
        width: 70px;
        height: 70px;
    }
    
    .circle-core {
        width: 35px;
        height: 35px;
    }
    
    /* About */
    .about-lead {
        font-size: 1.0625rem;
    }
    
    .about-box-title {
        font-size: 1.25rem;
    }
    
    .about-box-text {
        font-size: 1rem;
    }
    
    .about-result {
        flex-direction: column;
        text-align: center;
    }
    
    .about-result-icon {
        margin: 0 auto;
    }
    
    /* Story */
    .story-item {
        flex-direction: column;
    }
    
    .story-icon {
        margin: 0 auto;
    }
    
    .story-title {
        font-size: 1.25rem;
        text-align: center;
    }
    
    .story-quote {
        font-size: 1.0625rem;
    }
    
    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    /* Footer */
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    /* スクロールトップ */
    .scroll-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.625rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
}