/* ===== カラーパレット ===== */
:root {
    /* メインカラー - ロゴから */
    --color-primary: #C41E3A;      /* 深紅色 */
    --color-primary-dark: #9B1729;
    --color-primary-light: #E63946;
    --color-secondary: #5DADE2;     /* 浅蓝色 */
    --color-secondary-dark: #2E86AB;
    --color-secondary-light: #A8DADC;
    
    /* ニュートラルカラー */
    --color-black: #1A1A1A;
    --color-gray-900: #2D2D2D;
    --color-gray-800: #3D3D3D;
    --color-gray-700: #4D4D4D;
    --color-gray-600: #6D6D6D;
    --color-gray-500: #8D8D8D;
    --color-gray-400: #ADADAD;
    --color-gray-300: #D1D1D1;
    --color-gray-200: #E8E8E8;
    --color-gray-100: #F5F5F5;
    --color-white: #FFFFFF;
    
    /* アクセントカラー */
    --color-accent: #F1FAEE;
    
    /* タイポグラフィ */
    --font-ja: 'Noto Sans JP', sans-serif;
    --font-en: 'Inter', sans-serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* ブレークポイント */
    --mobile: 768px;
    --tablet: 1024px;
    --desktop: 1280px;
    
    /* トランジション */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* シャドウ */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ja);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-black);
}

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

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

/* ===== コンテナ ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== ナビゲーションバー ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    background-color: rgba(255, 255, 255, 0.98);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    align-items: flex-start;
}

.logo-image {
    max-height: 50px;
    max-width: 180px;
    height: auto;
    width: auto;
    object-fit: contain;
    transition: all var(--transition-normal);
}

.logo-image:hover {
    opacity: 0.8;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.logo-subtext {
    font-size: 0.75rem;
    font-family: var(--font-en);
    font-weight: 600;
    color: var(--color-gray-600);
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-menu a {
    font-weight: 500;
    color: var(--color-gray-700);
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-normal);
}

.nav-menu a:hover {
    color: var(--color-primary);
}

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

.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 500;
    color: var(--color-gray-700);
    padding: 0.5rem 0;
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-dropdown-toggle::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-normal);
}

.nav-dropdown-toggle:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 4px;
}

.nav-dropdown-toggle:hover {
    color: var(--color-primary);
}

.nav-dropdown-toggle:hover::after {
    width: 100%;
}

.nav-dropdown-icon {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid currentColor;
    transition: transform var(--transition-fast);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 0;
    min-width: 180px;
    list-style: none;
    padding: 0.75rem 0;
    margin: 0;
    background: var(--color-white);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    z-index: 1000;
}

.nav-dropdown-menu li {
    width: 100%;
}

.nav-dropdown-menu a {
    display: block;
    padding: 0.5rem 1.25rem;
    color: var(--color-gray-700);
    font-weight: 500;
}

.nav-dropdown-menu a:hover {
    background-color: var(--color-gray-100);
    color: var(--color-primary);
}

.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.nav-dropdown.open .nav-dropdown-toggle {
    color: var(--color-primary);
}

.nav-dropdown.open .nav-dropdown-toggle::after {
    width: 100%;
}

.nav-dropdown.open .nav-dropdown-icon {
    transform: rotate(180deg);
}

@media (hover: hover) {
    .nav-dropdown:hover .nav-dropdown-menu {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .nav-dropdown:hover .nav-dropdown-toggle {
        color: var(--color-primary);
    }

    .nav-dropdown:hover .nav-dropdown-toggle::after {
        width: 100%;
    }

    .nav-dropdown:hover .nav-dropdown-icon {
        transform: rotate(180deg);
    }
}

/* ===== 用户头像样式 ===== */
.nav-profile {
    display: flex;
    align-items: center;
}

.nav-profile-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.25rem 0;
    line-height: 1.1;
}

.nav-profile-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.1), rgba(93, 173, 226, 0.1));
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
    object-fit: cover;
}

/* 当显示图片时，img标签本身就是 .nav-profile-avatar */
img.nav-profile-avatar {
    border: 2px solid var(--color-primary);
    padding: 0;
}

/* 当显示首字母时 */
.nav-profile-initial {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-primary);
    text-transform: uppercase;
}

.nav-profile-name {
    font-weight: 600;
    color: var(--color-gray-800);
    font-size: 0.95rem;
}

.nav-profile-link:hover .nav-profile-name {
    color: var(--color-primary);
}

.nav-profile-link:hover .nav-profile-avatar {
    transform: scale(1.05);
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.15);
}

.nav-profile-avatar,
img.nav-profile-avatar {
    transition: all var(--transition-fast);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-gray-900);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ===== ヒーローセクション ===== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-white) 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(93, 173, 226, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(196, 30, 58, 0.08) 0%, transparent 50%);
    z-index: 0;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(93, 173, 226, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero-background::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(196, 30, 58, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(50px, 50px) scale(1.1);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.title-line {
    display: block;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.title-line:nth-child(1) {
    animation-delay: 0.2s;
}

.title-line:nth-child(2) {
    animation-delay: 0.4s;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
    opacity: 0;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-600);
    font-size: 0.875rem;
    font-family: var(--font-en);
    animation: fadeInUp 0.8s ease-out 1s forwards;
    opacity: 0;
}

.scroll-line {
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollAnimation 2s ease-in-out infinite;
}

@keyframes scrollAnimation {
    0%, 100% {
        transform: translateY(0);
        opacity: 0;
    }
    50% {
        transform: translateY(20px);
        opacity: 1;
    }
}

/* ===== ボタン ===== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 50px;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
    font-family: var(--font-ja);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(196, 30, 58, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(196, 30, 58, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-gray-900);
    border-color: var(--color-gray-900);
}

.btn-secondary:hover {
    background-color: var(--color-gray-900);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* ===== セクション共通 ===== */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 2px;
}

.section-subtitle {
    font-family: var(--font-en);
    font-size: 1rem;
    color: var(--color-gray-600);
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-top: var(--spacing-md);
}

/* ===== 会社概要 ===== */
.about {
    background-color: var(--color-white);
}

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

.about-text h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.about-text p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-700);
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.feature-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-white) 100%);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-item h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.feature-item p {
    color: var(--color-gray-700);
    font-size: 1rem;
}

/* ===== 事業内容 ===== */
.services {
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-white) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: block;
    text-decoration: none;
    color: inherit;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card.featured {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    transform: scale(1.05);
}

.service-card.featured h3,
.service-card.featured p,
.service-card.featured li {
    color: var(--color-white);
}

.service-card.featured:hover {
    transform: scale(1.08) translateY(-10px);
}

.service-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.service-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.service-card.featured .service-icon {
    color: var(--color-white);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.service-card p {
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.service-features {
    list-style: none;
    margin-top: var(--spacing-lg);
}

.service-features li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-gray-700);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

.service-card.featured .service-features li::before {
    color: var(--color-white);
}

/* ===== 技術力 ===== */
.technology {
    background-color: var(--color-white);
}

.tech-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.tech-intro h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.tech-intro p {
    font-size: 1.125rem;
    color: var(--color-gray-700);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.tech-category {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-white) 100%);
    padding: var(--spacing-xl);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.tech-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tech-category h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    font-weight: 700;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-tag {
    padding: 0.5rem 1rem;
    background-color: var(--color-white);
    border: 2px solid var(--color-gray-300);
    border-radius: 25px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-800);
    transition: all var(--transition-fast);
    cursor: default;
}

.tech-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* ===== お問い合わせ ===== */
.contact {
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-white) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-3xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-900);
}

.contact-item p {
    color: var(--color-gray-700);
    font-size: 1rem;
}

.contact-form-wrapper {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 600;
    color: var(--color-gray-900);
    font-size: 0.95rem;
}

.required {
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-gray-300);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-ja);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

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

/* ===== フッター ===== */
.footer {
    background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-black) 100%);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: flex;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    align-items: flex-start;
    justify-content: space-between;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: flex-start;
    text-align: left;
    flex-shrink: 0;
}

.footer-logo-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-sm);
    border: 2px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.05);
}

.footer-logo .logo-text {
    color: var(--color-white);
}

.footer-logo .logo-subtext {
    color: var(--color-gray-400);
}

.footer-tagline {
    margin-top: var(--spacing-sm);
    color: var(--color-gray-400);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-3xl);
    flex: 0 1 auto;
}

.footer-column {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.footer-column h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    font-weight: 700;
}

.footer-column ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

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

.footer-column-contact {
    flex: 0 0 auto;
    display: flex;
    min-width: 500px;
    max-width: 600px;
}

.footer-contact-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: var(--spacing-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
    justify-content: center;
}

.footer-contact-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(196, 30, 58, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.footer-contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.footer-contact-address {
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-contact-row {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-contact-row .footer-contact-item {
    flex: 1;
}

.footer-contact-details {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.footer-contact-label {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.footer-contact-text {
    color: var(--color-gray-300);
    font-size: 0.9rem;
    line-height: 1.6;
    text-decoration: none;
}

.footer-contact-link {
    color: var(--color-primary-light);
    transition: color var(--transition-fast);
    word-break: break-all;
}

.footer-contact-link:hover {
    color: var(--color-white);
    text-decoration: underline;
}

.footer-column a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

/* ===== レスポンシブデザイン ===== */
@media (max-width: 1024px) {
    :root {
        --spacing-3xl: 4rem;
        --spacing-2xl: 3rem;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-3xl: 3rem;
        --spacing-2xl: 2rem;
        --spacing-xl: 2rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        gap: var(--spacing-md);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-dropdown {
        width: 100%;
    }

    .nav-dropdown-toggle {
        justify-content: space-between;
        width: 100%;
        padding: 0.5rem 0;
    }

    .nav-dropdown-toggle::after {
        display: none;
    }

    .nav-dropdown-menu {
        position: static;
        min-width: 0;
        width: 100%;
        padding: 0;
        margin-top: 0.5rem;
        background: transparent;
        border-radius: 0.5rem;
        box-shadow: none;
        transform: none;
        opacity: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal), opacity var(--transition-normal);
    }

    .nav-dropdown.open .nav-dropdown-menu {
        opacity: 1;
        max-height: 200px;
    }

    .nav-dropdown-menu a {
        padding: 0.5rem 0;
    }
    
    .hero {
        min-height: 500px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card.featured {
        transform: scale(1);
    }
    
    .service-card.featured:hover {
        transform: scale(1.02) translateY(-5px);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-2xl);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .footer-column-contact {
        min-width: auto;
        max-width: none;
    }
    
    .footer-contact-row {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .scroll-indicator {
        display: none;
    }
}

/* ===== アニメーション ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ===== ユーティリティ ===== */
.text-center {
    text-align: center;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}