:root {
    --bg-primary: #0f0e1a;
    --bg-secondary: #161523;
    --bg-card: rgba(232, 221, 208, 0.04);
    --bg-card-hover: rgba(232, 221, 208, 0.08);
    --border: rgba(232, 221, 208, 0.1);
    --border-hover: rgba(232, 221, 208, 0.18);
    --text-primary: #f0ebe3;
    --text-secondary: #a09890;
    --text-muted: #6b6560;
    --text-warm: #e8ddd0;
    --accent-amber: #d4a574;
    --accent-teal: #5fb3a3;
    --accent-rose: #c98b8b;
    --accent-gold: #c9a96e;
    --gradient-primary: linear-gradient(135deg, var(--accent-amber), var(--accent-teal));
    --gradient-secondary: linear-gradient(135deg, var(--accent-teal), var(--accent-rose));
    --shadow-glow: 0 0 40px rgba(212, 165, 116, 0.12);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Noto Sans SC', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: rgba(212, 165, 116, 0.3);
    color: var(--text-primary);
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.logo-bracket {
    color: var(--accent-amber);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 6rem 2rem 4rem;
    text-align: center;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    animation: fadeInUp 1s ease;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-amber);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
    font-family: 'Noto Serif SC', 'Songti SC', serif;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: 1.5rem;
    min-height: 2.5rem;
}

.cursor {
    color: var(--accent-amber);
    animation: blink 1s infinite;
}

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

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: 0 4px 20px rgba(212, 165, 116, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(212, 165, 116, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--accent-amber);
    background: rgba(212, 165, 116, 0.05);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

.scroll-arrow {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-amber), transparent);
}

.section {
    padding: 6rem 2rem;
    position: relative;
    z-index: 1;
}

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

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(212, 165, 116, 0.1);
    border: 1px solid rgba(212, 165, 116, 0.2);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-amber);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    font-family: 'Noto Serif SC', 'Songti SC', serif;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.about {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: center;
}

.about-image-wrapper {
    display: flex;
    justify-content: center;
}

.about-image {
    position: relative;
    width: 280px;
    height: 280px;
}

.about-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    position: relative;
    z-index: 2;
    transition: all var(--transition-base);
}

.about-image:hover .about-avatar {
    border-color: var(--accent-amber);
}

.image-glow {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    opacity: 0.2;
    filter: blur(30px);
    z-index: 1;
    transition: opacity var(--transition-base);
}

.about-image:hover .image-glow {
    opacity: 0.4;
}

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.belief-statement {
    font-size: clamp(1.35rem, 3vw, 1.85rem);
    line-height: 1.9;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 2rem;
}

.belief-statement strong {
    color: var(--accent-amber);
    font-weight: 700;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.about-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

.portfolio {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.625rem 1.25rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--text-primary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.portfolio-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-base);
    position: relative;
}

.portfolio-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), var(--shadow-glow);
}

.portfolio-card.hidden {
    display: none;
}

.card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.card-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: transform var(--transition-slow);
}

.project-poster {
    background: var(--bg-secondary);
}

.project-poster img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.ai-gradient {
    background: linear-gradient(135deg, #c98b8b 0%, #c9a96e 100%);
}

.web-gradient {
    background: linear-gradient(135deg, #5fb3a3 0%, #d4a574 100%);
}

.system-gradient {
    background: linear-gradient(135deg, #d4a574 0%, #5fb3a3 100%);
}

.portfolio-card:hover .card-placeholder {
    transform: scale(1.05);
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.portfolio-card:hover .card-overlay {
    opacity: 1;
}

.card-link {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transform: scale(0.8);
    transition: transform var(--transition-base);
}

.portfolio-card:hover .card-link {
    transform: scale(1);
}

.card-content {
    padding: 1.5rem;
}

.card-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.card-tags span {
    padding: 0.25rem 0.75rem;
    background: rgba(212, 165, 116, 0.1);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--accent-amber);
    font-weight: 500;
}

.card-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    transition: color var(--transition-fast);
}

.portfolio-card:hover .card-content h3 {
    color: var(--accent-amber);
}

.branchmind-gradient {
    background-image: url('../assets/branchmind-cover-v3.png');
    background-position: center;
    background-size: cover;
}

.card-placeholder-label {
    display: block;
    margin-top: .6rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: .75rem;
    letter-spacing: .08em;
}

.card-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.blog {
    background: var(--bg-primary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card);
}

.blog-image {
    height: 180px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.blog-cover {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(212, 165, 116, 0.1), rgba(201, 169, 110, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-amber);
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-placeholder,
.blog-card:hover .blog-cover {
    transform: scale(1.05);
}

.blog-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.blog-category {
    padding: 0.25rem 0.75rem;
    background: rgba(212, 165, 116, 0.1);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--accent-amber);
    font-weight: 600;
}

.blog-category[data-category="tech"] {
    background: rgba(212, 165, 116, 0.1);
    color: var(--accent-amber);
}

.blog-category[data-category="philosophy"] {
    background: rgba(201, 139, 139, 0.1);
    color: var(--accent-rose);
}

.blog-category[data-category="society"] {
    background: rgba(95, 179, 163, 0.1);
    color: var(--accent-teal);
}

.blog-category[data-category="essay"] {
    background: rgba(201, 169, 110, 0.1);
    color: var(--accent-gold);
}

.blog-category[data-category="building"] {
    background: rgba(95, 179, 163, 0.1);
    color: var(--accent-teal);
}

.blog-category[data-category="thinking"] {
    background: rgba(201, 139, 139, 0.1);
    color: var(--accent-rose);
}

.blog-category[data-category="practice"] {
    background: rgba(212, 165, 116, 0.1);
    color: var(--accent-amber);
}

.blog-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.blog-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    transition: color var(--transition-fast);
}

.blog-card:hover .blog-title {
    color: var(--accent-amber);
}

.blog-excerpt {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
}

.blog-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.read-time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--accent-amber);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: gap var(--transition-fast);
}

.read-more:hover {
    gap: 0.5rem;
}

.blog-more {
    text-align: center;
}

.contact {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.contact-content {
    display: flex;
    justify-content: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
    max-width: 520px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.contact-item:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(212, 165, 116, 0.1);
    border: 1px solid rgba(212, 165, 116, 0.2);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-amber);
    flex-shrink: 0;
}

.contact-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.contact-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 3rem 2rem 2rem;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-amber);
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--text-primary);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-bottom p {
    margin-bottom: 0.25rem;
}

.heart {
    color: var(--accent-rose);
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.thoughts {
    background: var(--bg-secondary);
    padding: 5rem 2rem;
}

.thoughts-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.thought-quote {
    border: none;
    padding: 0;
    margin: 0 0 2rem;
}

.thought-quote p {
    font-family: 'Noto Serif SC', 'Songti SC', serif;
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 500;
    color: var(--text-warm);
    line-height: 1.6;
    font-style: italic;
    margin-bottom: 1rem;
}

.thought-quote cite {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: normal;
    letter-spacing: 0.05em;
}

.thoughts-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.thoughts-desc p {
    margin-bottom: 0.5rem;
}

.blog-filter {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.blog-card.hidden {
    display: none;
}

.about-text h3,
.card-content h3 {
    font-family: 'Noto Serif SC', 'Songti SC', serif;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: rgba(15, 14, 26, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-info {
        grid-template-columns: 1fr;
        text-align: left;
    }
    
    .portfolio-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .portfolio-filter {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section {
        padding: 4rem 1.5rem;
    }
    
    .about-image {
        width: 200px;
        height: 200px;
    }
}

/* ==========================================
   背景切换浮动面板
   ========================================== */
#bg-switcher {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    background: rgba(5, 8, 16, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease;
}

#bg-switcher:hover {
    border-color: rgba(212, 165, 116, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 20px rgba(212, 165, 116, 0.05);
}

.bg-switcher-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-align: center;
    font-weight: 600;
}

.bg-switcher-buttons {
    display: flex;
    gap: 0.375rem;
}

#bg-switcher button {
    padding: 0.375rem 0.75rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    white-space: nowrap;
}

#bg-switcher button:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

#bg-switcher button.active {
    background: linear-gradient(135deg, rgba(212, 165, 116, 0.2), rgba(95, 179, 163, 0.2));
    border-color: rgba(212, 165, 116, 0.3);
    color: var(--accent-amber);
    font-weight: 600;
}

@media (max-width: 768px) {
    #bg-switcher {
        bottom: 1rem;
        right: 1rem;
        padding: 0.5rem;
    }
    
    .bg-switcher-buttons {
        flex-direction: column;
    }
    
    #bg-switcher button {
        padding: 0.5rem 0.75rem;
    }
}