/* SoulSystemページ専用スタイル */

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* 概要セクション */
.overview {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 30%, #f5f7fa 60%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.overview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 15% 30%, rgba(123, 142, 255, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 85% 70%, rgba(155, 109, 216, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(123, 142, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
    animation: backgroundShift 15s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.overview::after {
    content: '';
    position: absolute;
    top: -30%;
    right: -15%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(123, 142, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: float 8s ease-in-out infinite;
    filter: blur(40px);
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1) rotate(0deg); }
    33% { transform: translate(-30px, -30px) scale(1.1) rotate(5deg); }
    66% { transform: translate(30px, -20px) scale(0.9) rotate(-5deg); }
}

.overview-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.overview-icon-wrapper {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 3.5rem;
    color: var(--haichat-white);
    box-shadow: 
        0 15px 40px rgba(123, 142, 255, 0.4),
        0 0 0 10px rgba(123, 142, 255, 0.1),
        0 0 0 20px rgba(155, 109, 216, 0.05);
    animation: iconPulse 3s ease-in-out infinite;
    position: relative;
    transition: var(--transition-normal);
}

.overview-icon-wrapper::before {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    opacity: 0.3;
    filter: blur(15px);
    z-index: -1;
    animation: iconPulse 3s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 
            0 15px 40px rgba(123, 142, 255, 0.4),
            0 0 0 10px rgba(123, 142, 255, 0.1),
            0 0 0 20px rgba(155, 109, 216, 0.05);
    }
    50% { 
        transform: scale(1.05);
        box-shadow: 
            0 20px 50px rgba(123, 142, 255, 0.5),
            0 0 0 15px rgba(123, 142, 255, 0.15),
            0 0 0 25px rgba(155, 109, 216, 0.08);
    }
}

.overview-header h2 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--haichat-black);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--haichat-blue) 0%, var(--haichat-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
}

.overview-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 2px;
}

.overview-subtitle {
    font-size: 1.35rem;
    color: #666;
    font-weight: 500;
    margin: var(--spacing-md) 0 0 0;
    letter-spacing: 0.01em;
}

.overview-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-xxl);
    align-items: start;
    margin-top: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.overview-text {
    animation: fadeInUp 0.8s ease-out;
}

.overview-intro {
    margin-bottom: var(--spacing-lg);
}

.overview-text .lead {
    font-size: 1.6rem;
    line-height: 2;
    margin-bottom: var(--spacing-md);
    color: var(--haichat-black);
    font-weight: 500;
    letter-spacing: -0.01em;
    position: relative;
    padding-left: var(--spacing-md);
    border-left: 4px solid transparent;
    border-image: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple)) 1;
    transition: var(--transition-normal);
}

.overview-text .lead:hover {
    padding-left: var(--spacing-lg);
    border-left-width: 6px;
}

.overview-text .lead .highlight {
    color: var(--haichat-blue);
    font-weight: 700;
    position: relative;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding: 0 4px;
}

.overview-description {
    margin-bottom: var(--spacing-lg);
}

.overview-text p {
    font-size: 1.1rem;
    line-height: 1.9;
    color: #555;
    margin-bottom: var(--spacing-md);
}

.overview-security {
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(123, 142, 255, 0.12) 0%, rgba(155, 109, 216, 0.12) 100%);
    border-left: 5px solid var(--haichat-blue);
    border-radius: var(--border-radius-lg);
    margin-top: var(--spacing-md);
    font-size: 1.15rem;
    line-height: 2;
    color: #444;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    box-shadow: 
        0 4px 15px rgba(123, 142, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
    transition: var(--transition-normal);
}

.overview-security::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(123, 142, 255, 0.05) 0%, rgba(155, 109, 216, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.overview-security:hover {
    transform: translateX(5px);
    box-shadow: 
        0 6px 20px rgba(123, 142, 255, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.overview-security:hover::before {
    opacity: 1;
}

.overview-security .highlight {
    color: var(--haichat-blue);
    font-weight: 700;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.overview-keypoints {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.keypoint-security {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(123, 142, 255, 0.05) 0%, rgba(155, 109, 216, 0.05) 100%);
    border-color: var(--haichat-blue);
}

.keypoint-security:hover {
    background: linear-gradient(135deg, rgba(123, 142, 255, 0.1) 0%, rgba(155, 109, 216, 0.1) 100%);
    border-color: var(--haichat-purple);
    box-shadow: 0 8px 20px rgba(123, 142, 255, 0.3);
}

.keypoint-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    border: 2px solid rgba(224, 224, 224, 0.5);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(20px);
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.keypoint-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--haichat-blue), var(--haichat-purple));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.keypoint-item:hover {
    border-color: var(--haichat-blue);
    box-shadow: 
        0 8px 25px rgba(123, 142, 255, 0.25),
        0 0 0 1px rgba(123, 142, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
    transform: translateY(-5px) scale(1.02);
    background: rgba(255, 255, 255, 0.95);
}

.keypoint-item:hover::before {
    transform: scaleX(1);
}

.keypoint-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--haichat-white);
    box-shadow: 
        0 8px 20px rgba(123, 142, 255, 0.4),
        0 0 0 4px rgba(123, 142, 255, 0.1);
    transition: var(--transition-normal);
    position: relative;
}

.keypoint-item:hover .keypoint-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 
        0 12px 30px rgba(123, 142, 255, 0.5),
        0 0 0 6px rgba(123, 142, 255, 0.15);
}

.keypoint-content h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--haichat-black);
    margin: 0 0 var(--spacing-xs) 0;
    letter-spacing: -0.01em;
    transition: var(--transition-normal);
}

.keypoint-item:hover .keypoint-content h4 {
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.keypoint-content p {
    font-size: 1rem;
    color: #666;
    margin: 0;
    line-height: 1.7;
    transition: var(--transition-normal);
}

.keypoint-item:hover .keypoint-content p {
    color: #555;
}

.overview-visual {
    position: relative;
    animation: slideInLeft 0.8s ease-out;
}

.overview-image-wrapper {
    position: relative;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    padding: 8px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    box-shadow: 
        0 20px 60px rgba(123, 142, 255, 0.3),
        0 0 0 1px rgba(123, 142, 255, 0.2),
        inset 0 0 20px rgba(123, 142, 255, 0.1);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.overview-image-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--border-radius-lg);
    background: linear-gradient(135deg, 
        rgba(123, 142, 255, 0.9) 0%, 
        rgba(155, 109, 216, 0.9) 50%,
        rgba(123, 142, 255, 0.9) 100%);
    z-index: 1;
    opacity: 0.95;
    transition: var(--transition-normal);
}

.overview-image-wrapper::after {
    content: '';
    position: absolute;
    inset: 8px;
    border-radius: calc(var(--border-radius-lg) - 8px);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px);
    z-index: 1;
    pointer-events: none;
    box-shadow: inset 0 0 30px rgba(255, 255, 255, 0.1);
}

.overview-image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 130%;
    height: 130%;
    background: 
        radial-gradient(circle, rgba(123, 142, 255, 0.3) 0%, rgba(155, 109, 216, 0.2) 50%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    animation: glowPulse 4s ease-in-out infinite;
    filter: blur(30px);
}

@keyframes glowPulse {
    0%, 100% { 
        opacity: 0.6;
        transform: translate(-50%, -50%) scale(1);
    }
    50% { 
        opacity: 0.9;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.overview-image {
    position: relative;
    z-index: 2;
    width: 100%;
    height: auto;
    border-radius: calc(var(--border-radius-lg) - 8px);
    box-shadow: 
        0 15px 40px rgba(0, 0, 0, 0.3),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: brightness(1) contrast(1.05);
    display: block;
}

.overview-image-wrapper:hover {
    transform: translateY(-5px);
    box-shadow: 
        0 30px 80px rgba(123, 142, 255, 0.4),
        0 0 0 2px rgba(123, 142, 255, 0.3);
}

.overview-image-wrapper:hover .overview-image {
    transform: scale(1.02);
    filter: brightness(1.05) contrast(1.1);
    box-shadow: 
        0 20px 50px rgba(0, 0, 0, 0.4),
        inset 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.overview-image-wrapper:hover::before {
    opacity: 1;
    background: linear-gradient(135deg, 
        rgba(123, 142, 255, 1) 0%, 
        rgba(155, 109, 216, 1) 50%,
        rgba(123, 142, 255, 1) 100%);
    filter: brightness(1.1);
    box-shadow: 0 0 20px rgba(123, 142, 255, 0.5);
}

.overview-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat-item {
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--haichat-white);
    box-shadow: 
        0 8px 20px rgba(123, 142, 255, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 
        0 15px 35px rgba(123, 142, 255, 0.5),
        0 0 0 2px rgba(255, 255, 255, 0.2);
}

.stat-item:hover::before {
    opacity: 1;
    animation: shine 1.5s ease-in-out;
}

@keyframes shine {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.95;
    font-weight: 500;
}

/* コア機能セクション */
.core-features {
    padding: var(--spacing-xl) 0;
    background: var(--haichat-dark-gray);
}

.core-features h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--haichat-white);
    font-size: 2.5rem;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background: var(--haichat-black);
    border: 1px solid #333;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.feature-card:nth-child(1) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(2) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.3s;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--haichat-blue), var(--haichat-purple));
    transform: scaleX(0);
    transition: var(--transition-normal);
}

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

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
    border-color: var(--haichat-blue);
}

.feature-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.feature-card:hover .feature-image img {
    transform: scale(1.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
    color: var(--haichat-white);
}

.feature-info h3 {
    color: var(--haichat-white);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.feature-info p {
    color: #ccc;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

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

.feature-list li {
    color: #aaa;
    padding: var(--spacing-xs) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.feature-list li i {
    color: var(--haichat-blue);
    font-size: 0.875rem;
}

/* アーキテクチャセクション */
.architecture {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0a0a0a 100%);
    position: relative;
    overflow: hidden;
}

.architecture::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 20%, rgba(123, 142, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(155, 109, 216, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.architecture-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    position: relative;
    z-index: 1;
}

.architecture-icon-wrapper {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 3rem;
    color: var(--haichat-white);
    box-shadow: 0 10px 40px rgba(123, 142, 255, 0.4);
    animation: pulse 3s ease-in-out infinite;
    position: relative;
}

.architecture-icon-wrapper::after {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    opacity: 0.3;
    filter: blur(20px);
    z-index: -1;
    animation: pulse 3s ease-in-out infinite;
}

.architecture-header h2 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--haichat-white);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.architecture-subtitle {
    font-size: 1.25rem;
    color: #aaa;
    font-weight: 400;
    margin: 0;
}

.architecture-content {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.architecture-diagram {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    position: relative;
}

.architecture-diagram::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, 
        rgba(123, 142, 255, 0.3) 0%, 
        rgba(155, 109, 216, 0.3) 50%,
        rgba(123, 142, 255, 0.3) 100%);
    transform: translateX(-50%);
    z-index: 0;
    animation: flow 3s ease-in-out infinite;
}

@keyframes flow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

.layer {
    position: relative;
    background: linear-gradient(135deg, rgba(30, 30, 30, 0.9) 0%, rgba(20, 20, 20, 0.9) 100%);
    border: 2px solid rgba(123, 142, 255, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    color: var(--haichat-white);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transition: var(--transition-normal);
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.layer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--haichat-blue), var(--haichat-purple));
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.layer:hover::before {
    transform: scaleX(1);
}

.layer:hover {
    transform: translateX(10px);
    border-color: rgba(123, 142, 255, 0.5);
    box-shadow: 0 15px 50px rgba(123, 142, 255, 0.3);
}

.layer-1 {
    animation-delay: 0.1s;
}

.layer-2 {
    animation-delay: 0.2s;
}

.layer-3 {
    animation-delay: 0.3s;
}

.layer-4 {
    animation-delay: 0.4s;
}

.layer-number {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--haichat-white);
    box-shadow: 0 5px 20px rgba(123, 142, 255, 0.4);
}

.layer-content {
    position: relative;
    z-index: 1;
}

.layer-icon-wrapper {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--haichat-white);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 5px 20px rgba(123, 142, 255, 0.4);
    transition: var(--transition-normal);
}

.layer:hover .layer-icon-wrapper {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 30px rgba(123, 142, 255, 0.6);
}

.layer-header {
    margin-bottom: var(--spacing-md);
}

.layer-header h3 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--haichat-white);
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.layer-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(123, 142, 255, 0.2);
    border: 1px solid rgba(123, 142, 255, 0.4);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--haichat-blue);
    font-weight: 500;
    margin-top: var(--spacing-xs);
}

.layer p {
    line-height: 1.9;
    margin: 0 0 var(--spacing-md) 0;
    color: #ccc;
    font-size: 1.05rem;
}

.layer-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.layer-feature-tag {
    padding: 0.4rem 0.8rem;
    background: rgba(123, 142, 255, 0.1);
    border: 1px solid rgba(123, 142, 255, 0.3);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--haichat-blue);
    transition: var(--transition-normal);
}

.layer:hover .layer-feature-tag {
    background: rgba(123, 142, 255, 0.2);
    border-color: rgba(123, 142, 255, 0.5);
    transform: translateY(-2px);
}

.layer-connector {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 20px;
    background: linear-gradient(180deg, var(--haichat-blue), var(--haichat-purple));
    z-index: 2;
}

.layer-4 .layer-connector {
    display: none;
}

.architecture-footer {
    margin-top: var(--spacing-xl);
    text-align: center;
}

.architecture-note {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(123, 142, 255, 0.1);
    border: 1px solid rgba(123, 142, 255, 0.3);
    border-radius: var(--border-radius-md);
    color: #aaa;
    font-size: 0.95rem;
    max-width: 800px;
}

.architecture-note i {
    color: var(--haichat-blue);
    font-size: 1.25rem;
}

.architecture-note p {
    margin: 0;
    line-height: 1.6;
}

/* 技術仕様セクション */
.tech-specs {
    padding: var(--spacing-xl) 0;
    background: var(--haichat-dark-gray);
}

.tech-specs h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--haichat-white);
    font-size: 2.5rem;
    font-weight: 700;
}

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

.spec-item {
    background: var(--haichat-black);
    border: 1px solid #333;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition-normal);
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.spec-item:nth-child(1) {
    animation-delay: 0.1s;
}

.spec-item:nth-child(2) {
    animation-delay: 0.2s;
}

.spec-item:nth-child(3) {
    animation-delay: 0.3s;
}

.spec-item:nth-child(4) {
    animation-delay: 0.4s;
}

.spec-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
    border-color: var(--haichat-blue);
}

.spec-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 2rem;
    color: var(--haichat-white);
}

.spec-item h3 {
    color: var(--haichat-white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.spec-item p {
    color: #ccc;
    line-height: 1.6;
    margin: 0;
}

/* 開発者向け情報セクション */
.developer-info {
    padding: var(--spacing-xl) 0;
    background: var(--haichat-white);
}

.developer-info h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--haichat-black);
    font-size: 2.5rem;
    font-weight: 700;
}

.developer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.developer-card {
    background: var(--haichat-white);
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition-normal);
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.developer-card:nth-child(1) {
    animation-delay: 0.1s;
}

.developer-card:nth-child(2) {
    animation-delay: 0.2s;
}

.developer-card:nth-child(3) {
    animation-delay: 0.3s;
}

.developer-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: var(--haichat-blue);
}

.developer-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid #e0e0e0;
}

.developer-card-header i {
    font-size: 2rem;
    color: var(--haichat-blue);
}

.developer-card-header h3 {
    color: var(--haichat-black);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.developer-card-body p {
    color: #555;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.developer-card-body ul {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-md) 0;
}

.developer-card-body ul li {
    color: #555;
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.developer-card-body ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--haichat-blue);
}

/* ユースケースセクション */
.use-cases {
    padding: var(--spacing-xl) 0;
    background: var(--haichat-dark-gray);
}

.use-cases h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--haichat-white);
    font-size: 2.5rem;
    font-weight: 700;
}

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

.use-case-card {
    background: var(--haichat-black);
    border: 1px solid #333;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition-normal);
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.use-case-card:nth-child(1) {
    animation-delay: 0.1s;
}

.use-case-card:nth-child(2) {
    animation-delay: 0.2s;
}

.use-case-card:nth-child(3) {
    animation-delay: 0.3s;
}

.use-case-card:nth-child(4) {
    animation-delay: 0.4s;
}

.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
    border-color: var(--haichat-blue);
}

.use-case-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 2rem;
    color: var(--haichat-white);
}

.use-case-card h3 {
    color: var(--haichat-white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.use-case-card p {
    color: #ccc;
    line-height: 1.6;
    margin: 0;
}

/* CTAセクション */
.cta-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--haichat-blue), var(--haichat-purple));
    color: var(--haichat-white);
}

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

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .overview {
        padding: var(--spacing-xl) 0;
    }
    
    .overview-icon-wrapper {
        width: 100px;
        height: 100px;
        font-size: 3rem;
    }
    
    .overview-header h2 {
        font-size: 2.5rem;
    }
    
    .overview-header h2::after {
        width: 60px;
    }
    
    .overview-subtitle {
        font-size: 1.1rem;
    }
    
    .overview-text .lead {
        padding-left: var(--spacing-sm);
        font-size: 1.3rem;
    }
    
    .overview-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .overview-text .lead {
        font-size: 1.25rem;
    }
    
    .overview-keypoints {
        grid-template-columns: 1fr;
    }
    
    .keypoint-security {
        grid-column: 1;
    }
    
    .overview-security {
        font-size: 1rem;
        padding: var(--spacing-sm);
    }
    
    .overview-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .developer-content {
        grid-template-columns: 1fr;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .architecture {
        padding: var(--spacing-xl) 0;
    }
    
    .architecture-icon-wrapper {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }
    
    .architecture-header h2 {
        font-size: 2rem;
    }
    
    .architecture-subtitle {
        font-size: 1rem;
    }
    
    .architecture-diagram {
        gap: var(--spacing-md);
    }
    
    .architecture-diagram::before {
        display: none;
    }
    
    .layer {
        padding: var(--spacing-lg);
        transform: none !important;
    }
    
    .layer:hover {
        transform: translateY(-5px) !important;
    }
    
    .layer-number {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
        top: var(--spacing-sm);
        right: var(--spacing-sm);
    }
    
    .layer-icon-wrapper {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .layer-header h3 {
        font-size: 1.5rem;
    }
    
    .layer p {
        font-size: 1rem;
    }
    
    .layer-connector {
        display: none;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}