html {
    background-color: var(--bg-primary);
}


:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --border-color: #e1e8ed;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-color: #4a90e2;
    --accent-hover: #357abd;
    --border-color: #30363d;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
}


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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    background-color: transparent;
    color: var(--text-primary);
    line-height: 1.6;
    padding: 20px;
    transition: color 0.3s ease;
}


#indexbody {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px;
    transition: background-color 0.3s ease;
}


header {
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-align: center;
}


.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    padding: 0;
    z-index: 1000;
}

.theme-toggle:hover {
    border-color: var(--accent-color);
    transform: scale(1.1);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-primary);
    fill: none;
}

.theme-toggle svg#moonIcon {
    fill: var(--text-primary);
    stroke: none;
}


nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 20px;
}

nav .button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background-color: transparent;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    font-weight: 500;
    transition: all 0.3s ease;
}

nav .button:hover {
    background-color: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

nav .button svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    transition: fill 0.3s ease;
}


.card-section {
    margin-bottom: 50px;
}

.section-title {
    font-size: 1.8em;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}


.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.card {
    display: block;
    padding: 24px;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.card h3 {
    font-size: 1.3em;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 10px 0;
}

.card p {
    font-size: 0.95em;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}


#indexfooter {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9em;
    padding: 30px 20px 20px;
    margin-top: 60px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content > div {
    margin-bottom: 12px;
}

.vercount {
    font-size: 1em;
    color: var(--text-secondary);
}

.copyright {
    margin: 15px 0;
}

#site_runtime {
    color: var(--accent-color);
    font-weight: 500;
}

.greeting {
    font-size: 1.1em;
    color: var(--text-primary);
    margin-top: 15px;
}

#indexfooter a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

#indexfooter a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}


.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}


.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav-brand {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-brand:hover {
    color: var(--accent-color);
}

.nav-separator {
    color: var(--text-secondary);
    margin: 0 0.3rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--accent-color);
}

.nav-current {
    color: var(--text-primary);
    font-weight: 500;
}


.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.page-header .subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}


.info-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.info-card h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.info-value {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.status-active {
    color: #27ae60;
}


.quick-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 3rem;
}

.quick-nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.quick-nav-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.quick-nav-item svg {
    flex-shrink: 0;
    stroke: var(--accent-color);
}

.quick-nav-item span {
    color: var(--text-primary);
    font-weight: 500;
}


.content-section {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.content-section h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.section-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}


.author-message {
    padding: 1rem;
}

.source-link {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    display: block;
}

.source-link a {
    color: var(--accent-color);
    text-decoration: none;
}

.source-link a:hover {
    text-decoration: underline;
}

.translator {
    margin-left: 1rem;
    font-style: italic;
}

.message-content p {
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: 1rem;
}


.feature-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: 8px;
    transition: all 0.3s ease;
}

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

.feature-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: 1.2rem;
}

.feature-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 2px solid var(--accent-color);
    border-radius: 8px;
}

.feature-icon svg {
    stroke: var(--accent-color);
}

.feature-content h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feature-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}


.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.link-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.link-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.link-card svg {
    flex-shrink: 0;
    stroke: var(--accent-color);
}

.link-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.link-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}


.info-box, .warning-box {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.info-box {
    background: rgba(52, 152, 219, 0.1);
    border: 2px solid var(--accent-color);
}

.warning-box {
    background: rgba(241, 196, 15, 0.1);
    border: 2px solid #f1c40f;
}

.info-box svg {
    flex-shrink: 0;
    stroke: var(--accent-color);
}

.warning-box svg {
    flex-shrink: 0;
    stroke: #f1c40f;
}

.info-box h3, .warning-box h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.info-box p, .warning-box p {
    color: var(--text-secondary);
    line-height: 1.6;
}


.changelog-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.changelog-item {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.changelog-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: all 0.3s ease;
    position: relative;
}

.changelog-summary::-webkit-details-marker {
    display: none;
}

.changelog-summary:hover {
    background: var(--bg-primary);
}

.changelog-summary::before {
    content: '';
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 0.5rem;
    height: 0.5rem;
    border-right: 2px solid var(--text-primary);
    border-bottom: 2px solid var(--text-primary);
    transition: transform 0.3s ease;
}

details[open] .changelog-summary::before {
    transform: translateY(-50%) rotate(-135deg);
}

.changelog-version {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.changelog-date {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 0.3rem 0.8rem;
    background: var(--bg-primary);
    border-radius: 6px;
}

.changelog-content {
    padding: 0 1.5rem 1.5rem;
    animation: slideDown 0.3s ease;
}

.changelog-content h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 1.5rem 0 1rem;
}

.changelog-content ul {
    list-style: none;
    padding-left: 0;
}

.changelog-content li {
    padding: 0.5rem 0 0.5rem 1.5rem;
    color: var(--text-secondary);
    position: relative;
}

.changelog-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}


.recipe-image-container {
    text-align: center;
    margin: 1rem 0;
}

.recipe-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.image-note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-style: italic;
}


.page-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
    text-align: center;
}

.page-footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.page-footer a {
    color: var(--accent-color);
    text-decoration: none;
}

.page-footer a:hover {
    text-decoration: underline;
}

.footer-stats {
    margin-top: 0.5rem;
    color: var(--text-secondary);
}


@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    #indexbody {
        padding: 20px;
    }
    
    header h1 {
        font-size: 1.8em;
    }
    
    .section-title {
        font-size: 1.5em;
    }
    
    .card-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .card {
        padding: 18px;
    }
    
    .card h3 {
        font-size: 1.1em;
    }
    
    .card p {
        font-size: 0.9em;
    }
    
    nav .button {
        padding: 10px 18px;
        font-size: 0.9em;
    }
    
    .theme-toggle {
        top: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
    }

    .container {
        padding: 10px;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .quick-nav {
        grid-template-columns: 1fr;
    }

    .feature-item {
        flex-direction: column;
        gap: 1rem;
    }

    .link-grid {
        grid-template-columns: 1fr;
    }

    .changelog-summary {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        padding-right: 3rem;
    }
}


.version-tree {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: var(--shadow-md);
    border: 2px solid var(--border-color);
}


.version-summary {
    list-style: none;
    cursor: pointer;
    position: relative;
    padding-left: 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    user-select: none;
    padding: 1rem 1rem 1rem 2.5rem;
    transition: color 0.3s ease;
}

.version-summary::-webkit-details-marker {
    display: none;
}

.version-summary:hover {
    color: var(--accent-color);
}

.version-summary::before {
    content: '';
    position: absolute;
    left: 0.8rem;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 0.5rem;
    height: 0.5rem;
    border-right: 2px solid var(--text-primary);
    border-bottom: 2px solid var(--text-primary);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.version-summary:hover::before {
    border-color: var(--accent-color);
}

details[open] .version-summary::before {
    transform: translateY(-50%) rotate(-135deg);
}

.version-content {
    margin-top: 1.5rem;
    animation: slideDown 0.3s ease;
}

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

.version-note {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 2rem;
    font-style: italic;
}

.version-category {
    margin-bottom: 2.5rem;
}

.version-category h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

.version-flow {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.version-line-group {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.version-branch-line {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-left: 2rem;
    flex-wrap: wrap;
}

.branch-connector {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: bold;
    min-width: 2rem;
}

.version-box {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.version-box:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.version-box.small {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.version-box-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.arrow {
    color: var(--accent-color);
    font-size: 1.2rem;
    font-weight: bold;
}

.author-tag {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-style: italic;
    padding: 0.3rem 0.8rem;
    background: var(--bg-primary);
    border-radius: 6px;
    margin-left: auto;
}


.version-image-link {
    display: inline-block;
    transition: transform 0.3s ease;
}

.version-image-link:hover {
    transform: scale(1.05);
}

.version-thumbnail {
    width: 80px;
    height: auto;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    cursor: pointer;
}

.version-thumbnail:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
}


@media (max-width: 768px) {
    .version-tree {
        padding: 1rem;
    }

    .version-box {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }

    .version-box.small {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }

    .version-branch-line {
        margin-left: 1rem;
    }

    .author-tag {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
        margin-left: 0;
        width: 100%;
        text-align: center;
    }

    .arrow {
        font-size: 1rem;
    }

    .version-thumbnail {
        width: 60px;
    }
}