/* ===== CSS Variables ===== */
:root {
    --primary-color: #8B7355;
    --primary-dark: #6B5344;
    --primary-light: #A99B8D;
    --accent-color: #D4AF37;
    --accent-light: #F0E68C;
    --text-primary: #2C2C2C;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F6F3;
    --bg-tertiary: #EDE8E3;
    --border-color: #E0DCD7;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --max-width: 1200px;
    --header-height: 70px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ===== Container ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--border-color);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    padding: 5px 0;
}

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

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    overflow: hidden;
    padding-top: var(--header-height);
}

.hero-content {
    text-align: center;
    z-index: 10;
    padding: 40px 20px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.title-accent {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.hero-visual {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.curtain-animation {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    display: flex;
    justify-content: space-between;
}

.curtain-left, .curtain-right {
    width: 15%;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary-color) 100%);
    opacity: 0.15;
}

.curtain-left {
    transform-origin: left top;
    animation: curtainSwayLeft 8s ease-in-out infinite;
}

.curtain-right {
    transform-origin: right top;
    animation: curtainSwayRight 8s ease-in-out infinite;
}

@keyframes curtainSwayLeft {
    0%, 100% { transform: skewX(-2deg); }
    50% { transform: skewX(2deg); }
}

@keyframes curtainSwayRight {
    0%, 100% { transform: skewX(2deg); }
    50% { transform: skewX(-2deg); }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--text-light);
    border-bottom: 2px solid var(--text-light);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ===== Stats Section ===== */
.stats-section {
    background: var(--primary-color);
    padding: 40px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
    color: white;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    display: block;
    line-height: 1;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-top: 8px;
    display: block;
}

/* ===== Section Common Styles ===== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

/* ===== Types Section ===== */
.types-section {
    background: var(--bg-secondary);
}

.types-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: white;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

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

.types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.type-card {
    background: white;
    border-radius: var(--border-radius-md);
    padding: 30px;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

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

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

.type-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.type-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.type-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.type-features {
    margin-bottom: 20px;
}

.type-features li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 4px 0;
}

.learn-more-btn {
    width: 100%;
    padding: 12px;
    background: var(--bg-secondary);
    color: var(--primary-color);
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.learn-more-btn:hover {
    background: var(--primary-color);
    color: white;
}

/* ===== Materials Section ===== */
.materials-section {
    background: white;
}

.materials-interactive {
    max-width: 1000px;
    margin: 0 auto;
}

.material-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.material-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    min-width: 100px;
}

.material-tab:hover, .material-tab.active {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.material-icon {
    font-size: 1.8rem;
}

.material-content {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: 40px;
}

.material-info {
    display: none;
}

.material-info.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

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

.material-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 16px;
}

.material-header h3 {
    font-size: 1.6rem;
    color: var(--text-primary);
}

.material-rating {
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.stars {
    color: var(--accent-color);
    font-size: 1.2rem;
    letter-spacing: 2px;
}

.material-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 30px;
}

.detail-card {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius-sm);
}

.detail-card h4 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--bg-tertiary);
}

.detail-card li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 6px 0;
    padding-left: 16px;
    position: relative;
}

.detail-card li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.material-meter {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.meter-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

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

.meter-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.meter-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 4px;
    transition: width 0.8s ease;
}

/* ===== Guide Section ===== */
.guide-section {
    background: var(--bg-secondary);
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto 60px;
}

.step-card {
    display: flex;
    gap: 30px;
    background: white;
    border-radius: var(--border-radius-md);
    padding: 30px;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.step-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.step-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-light);
    line-height: 1;
    min-width: 80px;
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.step-tips {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: var(--border-radius-sm);
}

.step-tips h4 {
    font-size: 0.9rem;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.step-tips li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 4px 0;
}

/* Room Selector */
.room-selector {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 40px;
    margin-top: 40px;
}

.room-selector-title {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.room-selector-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.room-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.room-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    min-width: 90px;
}

.room-btn:hover, .room-btn.active {
    background: var(--primary-color);
    color: white;
}

.room-icon {
    font-size: 1.5rem;
}

.room-recommendations {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    padding: 30px;
}

.room-info {
    display: none;
}

.room-info.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

.rec-header h4 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.rec-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.rec-item h5 {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.rec-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Colors Section ===== */
.colors-section {
    background: white;
}

.color-principles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.principle-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    padding: 30px;
    text-align: center;
}

.principle-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.principle-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.principle-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.color-demo {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.color-demo span {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

/* Color Wheel Section */
.color-wheel-section {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    margin-bottom: 60px;
    text-align: center;
}

.color-wheel-section h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.color-wheel-section > p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.color-picker {
    max-width: 800px;
    margin: 0 auto;
}

.color-options {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.color-option {
    width: 120px;
    height: 80px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 10px;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.color-option span {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    background: rgba(255,255,255,0.9);
    padding: 4px 12px;
    border-radius: 20px;
}

.color-option:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.color-result {
    background: white;
    border-radius: var(--border-radius-md);
    padding: 30px;
    min-height: 150px;
    text-align: left;
}

.result-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
    color: var(--text-light);
}

.color-recommendation {
    animation: fadeIn 0.4s ease;
}

.color-recommendation h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.color-recommendation ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.color-recommendation li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
}

.color-swatch {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

/* Seasonal Colors */
.seasonal-colors h3 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 30px;
}

.seasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.season-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    padding: 30px;
    text-align: center;
    transition: all var(--transition-normal);
}

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

.season-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.season-card h4 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.season-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.season-palette {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.season-palette span {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

/* ===== Care Section ===== */
.care-section {
    background: var(--bg-secondary);
}

.care-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.care-card {
    background: white;
    border-radius: var(--border-radius-md);
    padding: 30px;
    transition: all var(--transition-normal);
}

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

.care-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.care-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.care-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.care-content ul {
    margin-top: 12px;
}

.care-content li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
}

.care-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* Tips Carousel */
.care-tips-carousel {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 40px;
    text-align: center;
}

.care-tips-carousel h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
}

.tips-slider {
    position: relative;
    min-height: 120px;
    margin-bottom: 20px;
}

.tip-slide {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.tip-slide.active {
    position: relative;
    opacity: 1;
}

.tip-content {
    display: flex;
    align-items: center;
    gap: 24px;
    max-width: 700px;
    margin: 0 auto;
    padding: 20px;
    text-align: left;
}

.tip-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-light);
    line-height: 1;
}

.tip-content p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.tips-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.tip-nav-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.tip-nav-btn:hover {
    background: var(--primary-color);
    color: white;
}

.tips-dots {
    display: flex;
    gap: 8px;
}

.tips-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tips-dots .dot.active {
    background: var(--primary-color);
    transform: scale(1.2);
}

/* ===== FAQ Section ===== */
.faq-section {
    background: white;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-question {
    width: 100%;
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.05rem;
    font-weight: 500;
    text-align: left;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding-bottom: 20px;
}

.faq-answer p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.faq-answer ul {
    padding-left: 20px;
}

.faq-answer li {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 6px 0;
    list-style: disc;
}

.faq-answer li ul {
    margin-top: 8px;
}

.faq-answer li ul li {
    font-size: 0.9rem;
}

/* ===== SEO Section ===== */
.seo-section {
    background: var(--bg-tertiary);
    padding: 80px 0;
}

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

.seo-content h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 30px;
    text-align: center;
}

.seo-text p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: 20px;
}

.seo-text strong {
    color: var(--primary-color);
}

/* ===== Footer ===== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.footer-tagline {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: white;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-column a {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

.footer-disclaimer {
    margin-top: 8px;
    font-size: 0.85rem !important;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: 20px;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    font-size: 1.8rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    z-index: 10;
}

.modal-close:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-body {
    padding: 40px;
}

.modal-body h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.modal-body p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.modal-body ul {
    margin-bottom: 16px;
}

.modal-body li {
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.modal-body li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-links {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        gap: 0;
        padding: 20px;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-toggle {
        display: flex;
    }

    .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);
    }

    .step-card {
        flex-direction: column;
        gap: 16px;
    }

    .step-number {
        font-size: 2rem;
        min-width: auto;
    }

    .tip-content {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-brand {
        max-width: none;
    }

    .footer-links {
        flex-direction: column;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .section {
        padding: 60px 0;
    }

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

    .material-tabs {
        gap: 8px;
    }

    .material-tab {
        padding: 12px 16px;
        min-width: 80px;
    }

    .material-content {
        padding: 24px;
    }

    .room-buttons {
        gap: 8px;
    }

    .room-btn {
        padding: 12px 16px;
        min-width: 70px;
    }

    .color-options {
        gap: 12px;
    }

    .color-option {
        width: 100px;
        height: 70px;
    }

    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
    }
}

/* ===== Breadcrumbs ===== */
.breadcrumbs {
    background: var(--bg-secondary);
    padding: 12px 0;
    margin-top: var(--header-height);
    font-size: 0.9rem;
}

.breadcrumbs .container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumbs a {
    color: var(--primary-color);
}

.breadcrumbs a:hover {
    text-decoration: underline;
}

.breadcrumbs .separator {
    color: var(--text-light);
}

.breadcrumbs .current {
    color: var(--text-secondary);
}

/* ===== Dropdown Navigation ===== */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    z-index: 100;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid var(--border-color);
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

/* ===== Intro Section ===== */
.intro-section {
    background: white;
    padding: 80px 0;
}

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

.intro-content h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 24px;
    text-align: center;
}

.intro-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 20px;
}

.intro-text strong {
    color: var(--primary-color);
}

/* ===== User Guide Section ===== */
.user-guide-section {
    background: white;
}

.user-guide-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.guide-overview h3,
.faq-section-inner h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-color);
}

.guide-overview > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.guide-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.guide-feature {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: var(--border-radius-sm);
}

.guide-feature h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.guide-feature p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

@media (max-width: 992px) {
    .user-guide-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* ===== Latest Articles Section ===== */
.latest-articles-section {
    background: var(--bg-secondary);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.article-card {
    background: white;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.article-image {
    height: 160px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-icon {
    font-size: 4rem;
}

.article-content {
    padding: 24px;
}

.article-category {
    display: inline-block;
    background: var(--bg-secondary);
    color: var(--primary-color);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.article-content h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.article-content h3 a {
    color: var(--text-primary);
}

.article-content h3 a:hover {
    color: var(--primary-color);
}

.article-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.read-more:hover {
    text-decoration: underline;
}

.articles-cta {
    text-align: center;
}

@media (max-width: 992px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Blog Page Styles ===== */
.blog-hero {
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    padding: 60px 0;
    text-align: center;
    margin-top: var(--header-height);
}

.blog-hero h1 {
    font-size: 2.2rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.blog-hero p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    padding: 60px 0;
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Blog Post Styles ===== */
.blog-post-hero {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    padding: 80px 0;
    text-align: center;
    margin-top: var(--header-height);
    color: white;
}

.blog-post-hero h1 {
    font-size: 2rem;
    max-width: 800px;
    margin: 0 auto 20px;
    line-height: 1.4;
}

.post-meta {
    display: flex;
    justify-content: center;
    gap: 20px;
    font-size: 0.9rem;
    opacity: 0.9;
}

.blog-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
}

.blog-content h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--bg-tertiary);
}

.blog-content h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin: 30px 0 15px;
}

.blog-content p {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
}

.blog-content ul,
.blog-content ol {
    margin: 20px 0;
    padding-left: 24px;
}

.blog-content li {
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.7;
}

.blog-content ul li {
    list-style: disc;
}

.blog-content ol li {
    list-style: decimal;
}

.blog-content a {
    color: var(--primary-color);
    text-decoration: underline;
}

.blog-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 20px;
    margin: 30px 0;
    font-style: italic;
    color: var(--text-secondary);
}

.blog-cta {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: var(--border-radius-md);
    text-align: center;
    margin: 40px 0;
}

.blog-cta h3 {
    margin-bottom: 16px !important;
    border: none !important;
}

/* ===== Legal Pages (Privacy, Terms) ===== */
.legal-hero {
    background: var(--bg-secondary);
    padding: 60px 0;
    text-align: center;
    margin-top: var(--header-height);
}

.legal-hero h1 {
    font-size: 2rem;
    color: var(--text-primary);
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
}

.legal-content h2 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin: 40px 0 16px;
}

.legal-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.legal-content ul {
    margin: 16px 0;
    padding-left: 24px;
}

.legal-content li {
    color: var(--text-secondary);
    margin-bottom: 8px;
    list-style: disc;
}

.legal-content .last-updated {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

/* ===== Contact Page ===== */
.contact-section {
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-form textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-form .checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.contact-form .checkbox-group input {
    width: auto;
    margin-top: 4px;
}

.contact-info-card {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: var(--border-radius-md);
    margin-bottom: 20px;
}

.contact-info-card h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* ===== Footer Legal Links ===== */
.footer-legal {
    margin-top: 16px;
    display: flex;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
}

.footer-legal a {
    color: rgba(255,255,255,0.6);
}

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

.footer-legal span {
    color: rgba(255,255,255,0.3);
}

.footer-desc {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    margin-top: 12px;
    line-height: 1.6;
}

/* ===== Related Articles ===== */
.related-articles {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: var(--border-radius-md);
    margin-top: 60px;
}

.related-articles h3 {
    font-size: 1.3rem;
    margin-bottom: 24px;
    text-align: center;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.related-card {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.related-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.related-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.related-card h4 a {
    color: var(--text-primary);
}

.related-card h4 a:hover {
    color: var(--primary-color);
}

.related-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .related-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Tags ===== */
.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 30px 0;
}

.tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--primary-color);
    color: white;
}

/* ===== Print Styles ===== */
@media print {
    .navbar,
    .hero-visual,
    .scroll-indicator,
    .back-to-top,
    .modal,
    .breadcrumbs {
        display: none !important;
    }

    .hero {
        min-height: auto;
        padding: 40px 0;
    }

    .section {
        padding: 40px 0;
        page-break-inside: avoid;
    }
}