:root {
    --primary: #2C2C2C;
    --primary-light: #4A4A4A;
    --accent: #8B6914;
    --accent-light: #C9A961;
    --bg-dark: #1A1A1A;
    --bg-light: #F8F8F6;
    --bg-warm: #F5F2EE;
    --white: #FFFFFF;
    --text: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --border: #E5E5E5;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.12);
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --font-serif: 'Noto Serif SC', Georgia, serif;
    --font-sans: 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text);
    line-height: 1.7;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
    font-family: var(--font-serif);
    font-weight: 500;
    color: var(--primary);
    line-height: 1.3;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.site-header.scrolled {
    border-bottom-color: var(--border);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.site-header .navbar { padding: 0; min-height: 80px; }

.site-logo {
    display: flex;
    align-items: center;
    height: 80px;
}

.site-logo .brand-name {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 3px;
}

.site-logo .brand-sub {
    font-size: 11px;
    color: var(--accent);
    letter-spacing: 4px;
    margin-left: 8px;
    padding-left: 8px;
    border-left: 1px solid var(--border);
}

.navbar-nav .nav-link {
    font-size: 15px;
    color: var(--text);
    padding: 30px 20px !important;
    position: relative;
    letter-spacing: 1px;
    font-weight: 400;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-item.active .nav-link {
    color: var(--accent);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-item.active .nav-link::after {
    width: 30px;
}

.navbar-toggler {
    border: none;
    padding: 10px;
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
}

.hero-slider { width: 100%; height: 100%; }

.hero-slide {
    position: relative;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

.hero-slide::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.5) 100%);
}

.hero-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-left: 8%;
    color: white;
    z-index: 2;
}

.hero-content .label {
    font-size: 14px;
    letter-spacing: 8px;
    text-transform: uppercase;
    margin-bottom: 20px;
    opacity: 0.9;
}

.hero-title {
    font-size: clamp(40px, 5vw, 64px);
    font-weight: 600;
    color: white;
    margin-bottom: 24px;
    line-height: 1.2;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: clamp(18px, 2vw, 22px);
    margin-bottom: 40px;
    opacity: 0.9;
    letter-spacing: 2px;
    max-width: 600px;
}

.hero-btn {
    display: inline-block;
    padding: 16px 48px;
    background: transparent;
    color: white;
    border: 1px solid white;
    font-size: 14px;
    letter-spacing: 3px;
    text-transform: uppercase;
    transition: var(--transition);
    width: fit-content;
}

.hero-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.swiper-pagination-bullet {
    width: 40px;
    height: 2px;
    border-radius: 0;
    background: rgba(255, 255, 255, 0.5);
    opacity: 1;
}

.swiper-pagination-bullet-active {
    background: var(--accent-light);
    height: 3px;
}

.swiper-button-next,
.swiper-button-prev {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}

.swiper-button-next:hover,
.swiper-button-prev:hover {
    background: var(--accent);
}

/* Sections */
.section { padding: 100px 0; }

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

.section-title .en {
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 6px;
    text-transform: uppercase;
    margin-bottom: 16px;
    display: block;
}

.section-title h2 {
    font-size: clamp(28px, 3vw, 38px);
    margin-bottom: 20px;
}

.section-title .line {
    width: 40px;
    height: 1px;
    background: var(--accent);
    margin: 0 auto;
}

.section-desc {
    text-align: center;
    color: var(--text-light);
    max-width: 700px;
    margin: 30px auto 0;
    line-height: 1.8;
}

/* Brand Philosophy */
.brand-section { background: var(--bg-warm); }

.brand-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.brand-text h2 {
    font-size: 36px;
    margin-bottom: 24px;
}

.brand-text p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.brand-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.brand-feature {
    padding: 30px;
    background: var(--white);
    transition: var(--transition);
}

.brand-feature:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.brand-feature .num {
    font-size: 32px;
    color: var(--accent);
    font-family: var(--font-serif);
    margin-bottom: 12px;
}

.brand-feature h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.brand-feature p {
    color: var(--text-light);
    font-size: 14px;
    margin: 0;
}

/* Product Section */
.product-section { background: var(--white); }

.product-categories {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.product-category {
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.product-category img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 16px;
    border: 2px solid transparent;
    transition: var(--transition);
}

.product-category:hover img {
    border-color: var(--accent);
    transform: scale(1.05);
}

.product-category h4 {
    font-size: 15px;
    font-weight: 500;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--white);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border);
}

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

.product-card .product-image {
    position: relative;
    padding-top: 100%;
    overflow: hidden;
    background: var(--bg-light);
}

.product-card .product-image img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-card .product-info {
    padding: 24px;
}

.product-card .product-series {
    font-size: 12px;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.product-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.product-card .product-desc {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card .btn-view {
    color: var(--accent);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--accent);
    padding-bottom: 2px;
}

.product-card .btn-view:hover {
    color: var(--accent-dark);
}

/* Case Section */
.case-section { background: var(--bg-light); }

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
}

.case-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.case-item:first-child,
.case-item:nth-child(4) {
    grid-row: span 2;
    aspect-ratio: auto;
}

.case-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.case-item:hover img {
    transform: scale(1.05);
}

.case-overlay {
    position: absolute;
    inset: 0;
    padding: 30px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    color: white;
    opacity: 0;
    transition: var(--transition);
}

.case-item:hover .case-overlay {
    opacity: 1;
}

.case-overlay h4 {
    font-size: 20px;
    color: white;
    margin-bottom: 8px;
}

.case-overlay p {
    font-size: 14px;
    opacity: 0.9;
}

/* Color Section */
.color-section { background: var(--white); }

.color-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.color-item {
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.color-swatch {
    width: 100%;
    padding-top: 100%;
    border-radius: 8px;
    position: relative;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.color-item:hover .color-swatch {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.color-code {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 12px;
    letter-spacing: 1px;
    background: rgba(0, 0, 0, 0.3);
    padding: 4px 10px;
    border-radius: 4px;
}

.color-info h4 {
    font-size: 15px;
    margin-bottom: 4px;
}

.color-info p {
    font-size: 12px;
    color: var(--text-muted);
}

/* News Section */
.news-section { background: var(--bg-warm); }

.news-list {
    max-width: 800px;
    margin: 0 auto;
}

.news-item {
    display: flex;
    padding: 30px 0;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.news-item:hover {
    padding-left: 20px;
}

.news-date {
    flex-shrink: 0;
    width: 100px;
    text-align: center;
    padding: 20px;
    background: var(--white);
    border: 1px solid var(--border);
    margin-right: 30px;
}

.news-date .day {
    font-size: 36px;
    font-weight: 300;
    display: block;
    line-height: 1;
    color: var(--primary);
}

.news-date .month {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.news-content { flex: 1; }

.news-content h4 {
    font-size: 18px;
    margin-bottom: 12px;
}

.news-content p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 12px;
}

.news-content .news-more {
    color: var(--accent);
    font-size: 13px;
    letter-spacing: 1px;
}

/* CTA Section */
.cta-section {
    background: var(--primary);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: clamp(28px, 4vw, 42px);
    color: white;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.8;
    letter-spacing: 2px;
}

.cta-btn {
    display: inline-block;
    padding: 16px 56px;
    background: var(--accent);
    color: white;
    font-size: 14px;
    letter-spacing: 3px;
    text-transform: uppercase;
    transition: var(--transition);
}

.cta-btn:hover {
    background: var(--accent-light);
    color: var(--primary);
    transform: translateY(-3px);
}

/* Footer */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.7);
}

.footer-top {
    padding: 80px 0 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h4 {
    color: white;
    font-size: 24px;
    margin-bottom: 20px;
    letter-spacing: 3px;
}

.footer-brand .brand-desc {
    margin-bottom: 24px;
    font-size: 14px;
    line-height: 1.8;
}

.contact-info p {
    margin-bottom: 12px;
    font-size: 14px;
}

.footer-top h5 {
    color: white;
    font-size: 16px;
    margin-bottom: 24px;
    font-weight: 500;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li { margin-bottom: 12px; }

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

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

.qrcode-area {
    display: flex;
    gap: 16px;
    margin-top: 20px;
}

.qrcode-placeholder {
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

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

/* Page Header */
.page-header {
    padding: 120px 0 60px;
    background: var(--bg-warm);
    text-align: center;
}

.page-header .breadcrumb {
    margin-bottom: 20px;
}

.page-header .breadcrumb-item {
    color: var(--text-light);
    font-size: 13px;
    letter-spacing: 1px;
}

.page-header h1 {
    font-size: clamp(32px, 4vw, 44px);
}

.breadcrumb-wrapper {
    padding: 15px 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
}

.breadcrumb { margin: 0; font-size: 14px; }

.breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    padding: 0 10px;
    color: var(--text-muted);
}

/* Forms */
.contact-form {
    background: var(--white);
    padding: 40px;
    border: 1px solid var(--border);
}

.contact-form .form-group { margin-bottom: 24px; }

.contact-form label {
    display: block;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--text);
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    background: var(--white);
    font-size: 14px;
    transition: var(--transition);
}

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

.contact-form textarea {
    resize: vertical;
    min-height: 140px;
}

/* Buttons */
.btn-primary {
    display: inline-block;
    padding: 14px 44px;
    background: var(--primary);
    color: white;
    font-size: 14px;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--accent);
    transform: translateY(-2px);
}

.btn-outline {
    display: inline-block;
    padding: 12px 36px;
    background: transparent;
    color: var(--primary);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: 1px solid var(--primary);
    cursor: pointer;
    transition: var(--transition);
}

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

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 992px) {
    .section { padding: 70px 0; }
    .brand-content { grid-template-columns: 1fr; gap: 40px; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .color-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .site-header .navbar { padding: 10px 0; min-height: auto; }
    .site-logo .brand-name { font-size: 20px; }
    .site-logo .brand-sub { display: none; }
    .navbar-nav .nav-link { padding: 15px 0 !important; }
    .hero-section { height: 80vh; min-height: 500px; }
    .hero-content { padding: 0 20px; }
    .section { padding: 50px 0; }
    .product-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .case-grid { grid-template-columns: 1fr; }
    .case-item:first-child,
    .case-item:nth-child(4) { grid-row: auto; aspect-ratio: 4/3; }
    .color-grid { grid-template-columns: repeat(2, 1fr); }
    .brand-features { grid-template-columns: 1fr; }
    .news-item { flex-direction: column; }
    .news-date { width: 80px; margin-bottom: 16px; }
    .page-header { padding: 100px 0 40px; }
    .contact-form { padding: 24px; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .product-categories { gap: 20px; }
    .product-category img { width: 80px; height: 80px; }
    .color-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; }
}

/* About Page - Timeline */
.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--border);
    z-index: 1;
}

.timeline-item {
    display: flex;
    margin-bottom: 50px;
    position: relative;
    align-items: flex-start;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 30px;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border: 3px solid var(--white);
    border-radius: 50%;
    z-index: 2;
    box-shadow: 0 0 0 3px var(--accent);
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(even)::before {
    left: auto;
    right: 50%;
    transform: translateX(50%);
}

.timeline-year {
    width: 100px;
    flex-shrink: 0;
    text-align: center;
    padding: 15px 10px;
    background: var(--primary);
    color: var(--white);
    border-radius: 8px;
    font-weight: 600;
    font-size: 18px;
    height: fit-content;
    position: relative;
    z-index: 3;
}

.timeline-content {
    flex: 1;
    padding: 25px 30px;
    background: var(--white);
    border-radius: 12px;
    margin: 0 40px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}

.timeline-content h4 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--primary);
}

.timeline-content p {
    color: var(--text-light);
    margin: 0;
    line-height: 1.7;
}

.timeline-image {
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
}

.timeline-image img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
    transition: transform 0.4s ease;
}

.timeline-content:hover .timeline-image img {
    transform: scale(1.03);
}

/* About Page - Benefit Cards */
.benefit-card {
    padding: 40px 30px;
    background: var(--white);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
    height: 100%;
}

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

.benefit-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.benefit-card h4 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--primary);
}

.benefit-card p {
    color: var(--text-light);
    margin: 0;
    line-height: 1.7;
}

/* About Page - Honors */
.honor-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--white);
    border-radius: 12px;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.honor-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.honor-icon {
    font-size: 56px;
    margin-bottom: 15px;
}

.honor-item h5 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--primary);
}

.honor-item p {
    color: var(--text-muted);
    font-size: 14px;
    margin: 0;
}

/* Parallax Effect */
.parallax-bg {
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
}

/* Image Fade In */
img {
    opacity: 1;
    transition: opacity 0.5s ease;
}

/* Button Ripple */
.btn-primary, .btn-outline, .cta-btn, .hero-btn {
    position: relative;
    overflow: hidden;
}

.btn-primary::after, .btn-outline::after, .cta-btn::after, .hero-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn-primary:hover::after, .btn-outline:hover::after, .cta-btn:hover::after, .hero-btn:hover::after {
    width: 300px;
    height: 300px;
}

/* Responsive Timeline */
@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: row;
        padding-left: 50px;
    }
    
    .timeline-item::before,
    .timeline-item:nth-child(even)::before {
        left: 20px;
        right: auto;
        transform: translateX(-50%);
    }
    
    .timeline-year {
        width: 70px;
        font-size: 14px;
        padding: 10px 5px;
    }
    
    .timeline-content {
        margin: 0 0 0 25px;
        padding: 20px;
    }
    
    .timeline-image img {
        height: 150px;
    }
}