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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    background-color: #ffffff;
    color: #000000;
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: #ffffff;
    border-right: 1px solid #e5e5e5;
    position: fixed;
    height: 100vh;
    padding: 40px 28px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: 100;
}

.nav-item {
    display: block;
    padding: 12px 0;
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    position: relative;
}

.nav-item:hover,
.nav-item.active {
    color: #5ca0e0;
    padding-left: 12px;
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: #5ca0e0;
    border-radius: 50%;
}

.main-content {
    margin-left: 260px;
    flex: 1;
    padding: 60px 80px;
    max-width: 1100px;
}

.page {
    display: none;
    animation: fadeIn 0.5s;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h2 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 2px solid #5ca0e0;
    display: inline-block;
}

h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 32px 0 16px;
    color: #000;
}

.hero-slogan {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-slogan span {
    color: #5ca0e0;
}

.hero-desc {
    font-size: 16px;
    line-height: 1.8;
    color: #333;
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-image {
    width: 100%;
    height: 400px;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    margin-bottom: 40px;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-card {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid #eee;
}

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

.member-role {
    color: #5ca0e0;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.member-name {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.member-avatar {
    width: 1.4em;
    height: 1.4em;
    border-radius: 50%;
    object-fit: cover;
    background-color: #f0f0f0;
    flex-shrink: 0;
}

.member-desc {
    line-height: 1.8;
    color: #444;
    font-size: 15px;
    margin-bottom: 16px;
}

.works-list {
    margin-top: 16px;
}

.work-name-item {
    display: inline-block;
    padding: 6px 12px;
    background: #f5f5f5;
    margin-right: 8px;
    margin-bottom: 8px;
    font-size: 13px;
    color: #666;
    transition: all 0.3s;
    cursor: pointer;
}

.work-name-item:hover {
    background: #5ca0e0;
    color: #fff;
}

.collection-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 24px;
}

.collection-card {
    border: 1px solid #eee;
    padding: 40px 32px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.collection-card:hover {
    border-color: #5ca0e0;
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.collection-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: #5ca0e0;
    transform: scaleY(0);
    transition: transform 0.3s;
}

.collection-card:hover::before {
    transform: scaleY(1);
}

.collection-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.collection-author {
    font-size: 13px;
    color: #5ca0e0;
    margin-bottom: 16px;
    font-weight: 500;
}

.collection-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 24px;
}

.collection-arrow {
    color: #999;
    font-size: 20px;
    transition: all 0.3s;
}

.collection-card:hover .collection-arrow {
    color: #5ca0e0;
    transform: translateX(8px);
}

.work-detail {
    display: none;
}

.work-detail.active {
    display: block;
    animation: fadeIn 0.5s;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #666;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 32px;
    transition: color 0.3s;
}

.back-btn:hover {
    color: #5ca0e0;
}

.work-preview {
    width: 100%;
    height: 400px;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
    overflow: hidden;
}

.work-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.work-info {
    line-height: 1.8;
    color: #444;
}

.work-link-btn {
    display: inline-block;
    margin-top: 24px;
    padding: 12px 24px;
    background: #000;
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    transition: background 0.3s;
}

.work-link-btn:hover {
    background: #5ca0e0;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 32px;
    margin-bottom: 32px;
}

.image-grid img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 4px;
    background: #f0f0f0;
    transition: transform 0.2s;
}

.image-grid img:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.video-wrapper {
    width: 100%;
    margin-bottom: 48px;
    background: #000;
    border-radius: 4px;
    overflow: hidden;
}

.video-wrapper iframe {
    width: 100%;
    height: 500px;
    border: none;
    display: block;
}

.video-label {
    font-size: 14px;
    color: #5ca0e0;
    margin-bottom: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.video-fallback {
    padding: 40px;
    background: #f5f5f5;
    text-align: center;
    margin-bottom: 32px;
}

.video-fallback p {
    color: #666;
    margin-bottom: 16px;
}

.timeline {
    position: relative;
    padding-left: 24px;
    border-left: 2px solid #e5e5e5;
    margin: 32px 0;
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
    padding-left: 24px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 4px;
    width: 12px;
    height: 12px;
    background: #5ca0e0;
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px #5ca0e0;
}

.timeline-date {
    font-size: 14px;
    color: #5ca0e0;
    font-weight: 600;
    margin-bottom: 4px;
    font-family: monospace;
}

.timeline-title {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 18px;
}

.timeline-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

.join-section {
    background: #f9f9f9;
    padding: 40px;
    margin-top: 32px;
}

.join-email {
    font-size: 24px;
    color: #5ca0e0;
    font-weight: 600;
    margin-top: 16px;
    font-family: monospace;
}

.interaction-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 24px;
}

.interaction-card {
    border: 1px solid #eee;
    padding: 32px;
    transition: all 0.3s;
}

.interaction-card:hover {
    border-color: #5ca0e0;
    transform: translateY(-4px);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.btn {
    background: #000;
    color: #fff;
    padding: 14px 32px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    background: #5ca0e0;
}

.btn-outline {
    background: transparent;
    color: #000;
    border: 1px solid #000;
}

.btn-outline:hover {
    background: #000;
    color: #fff;
}

.highlight-box {
    margin-top: 48px;
    padding: 48px;
    background: #000;
    color: #fff;
    text-align: center;
}

.highlight-text {
    font-size: 24px;
    font-style: italic;
    margin-bottom: 16px;
    font-weight: 300;
}

.video-placeholder {
    background: #f5f5f5;
    padding: 80px;
    text-align: center;
    margin-top: 24px;
    overflow: hidden;
}

.video-placeholder img {
    max-width: 100%;
    max-height: 300px;
    object-fit: contain;
}

.footer-link {
    color: #999;
    text-decoration: none;
    font-size: 12px;
    transition: color 0.3s;
    line-height: 1.6;
}

.footer-link:hover {
    color: #5ca0e0;
}