/* Reset & Base */
:root {
    --primary-color: #000000;
    --text-color: #333333;
    --light-gray: #f8f8f8;
    --border-color: #e0e0e0;
    --white: #ffffff;
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --header-height: 80px;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: var(--font-sans); 
    color: var(--text-color); 
    background: var(--white); 
    line-height: 1.6; 
    -webkit-font-smoothing: antialiased; 
    overflow-x: hidden;
    scroll-behavior: smooth;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-serif); font-weight: 400; color: var(--primary-color); line-height: 1.2; }

/* Language Switch */
html[lang="en"] .lang-cn { display: none !important; }
html[lang="zh-CN"] .lang-en { display: none !important; }

.lang-switch { display: flex; gap: 8px; align-items: center; cursor: pointer; font-family: var(--font-sans); font-size: 0.85rem; font-weight: 500; }
.lang-btn { background: none; border: none; font: inherit; color: #999; cursor: pointer; transition: color 0.3s; padding: 0; outline: none; }
.lang-btn.active { color: var(--primary-color); font-weight: 600; }

/* Header */
.header { position: fixed; top: 0; left: 0; width: 100%; height: var(--header-height); background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(10px); z-index: 1000; border-bottom: 1px solid transparent; transition: var(--transition); }
.header.scrolled { border-bottom: 1px solid var(--border-color); box-shadow: 0 4px 20px rgba(0,0,0,0.03); }
.header-container { display: flex; justify-content: space-between; align-items: center; padding: 0 5%; height: 100%; max-width: 1800px; margin: 0 auto; }
.logo { font-family: var(--font-serif); font-size: 1.8rem; font-weight: 600; letter-spacing: 1px; color: var(--primary-color); }
.main-nav { display: none; }
@media (min-width: 1024px) { .main-nav { display: block; } }
.nav-list { display: flex; gap: 40px; }
.nav-link { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1px; color: var(--primary-color); position: relative; padding: 10px 0; transition: var(--transition); }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 1px; background: var(--primary-color); transition: var(--transition); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.header-actions { display: flex; align-items: center; gap: 20px; font-size: 0.85rem; letter-spacing: 1px; }

/* Mobile Menu Button */
.menu-btn { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 10px; z-index: 1001; }
.menu-btn span { display: block; width: 25px; height: 2px; background: var(--primary-color); transition: var(--transition); }
@media (max-width: 1023px) { .menu-btn { display: flex; } }

/* Hero Section */
.hero { height: 100vh; position: relative; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.hero-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; z-index: -1; transform: scale(1.05); animation: zoomIn 20s infinite alternate; }
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(to right, rgba(0,0,0,0.5), rgba(0,0,0,0.2)); z-index: -1; }
.hero-content { text-align: center; color: var(--white); z-index: 1; max-width: 800px; padding: 0 20px; opacity: 0; transform: translateY(30px); animation: fadeInUp 1.2s forwards 0.3s; }
.hero-title { 
    font-size: 4.5rem; 
    line-height: 1.1; 
    margin-bottom: 20px; 
    letter-spacing: 2px; 
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
    background-image: linear-gradient(
        110deg,
        rgba(255, 255, 255, 0.9) 0%,
        rgba(255, 255, 255, 1) 25%,
        rgba(220, 240, 255, 0.9) 40%,
        rgba(255, 255, 255, 1) 50%,
        rgba(255, 230, 240, 0.9) 60%,
        rgba(255, 255, 255, 1) 75%,
        rgba(255, 255, 255, 0.9) 100%
    );
    background-size: 200% auto;
    animation: flowLight 4s linear infinite;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.8)) drop-shadow(0 0 30px rgba(255, 255, 255, 0.4));
}
@keyframes flowLight { to { background-position: -200% center; } }
@media(max-width: 768px) { .hero-title { font-size: 3rem; } }
.hero-subtitle { font-size: 1.1rem; font-weight: 300; letter-spacing: 2px; margin-bottom: 40px; text-transform: uppercase; }
.btn { display: inline-block; padding: 16px 45px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 2px; background: var(--white); color: var(--primary-color); transition: var(--transition); border: 1px solid var(--white); cursor: pointer; }
.btn:hover { background: transparent; color: var(--white); }
.btn-outline-dark { background: transparent; border-color: var(--primary-color); color: var(--primary-color); }
.btn-outline-dark:hover { background: var(--primary-color); color: var(--white); }

/* Animations */
@keyframes zoomIn { from { transform: scale(1); } to { transform: scale(1.1); } }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

/* Section Styling */
.section { padding: 120px 5%; max-width: 1800px; margin: 0 auto; }
.section-title { font-size: 2.8rem; text-align: center; margin-bottom: 80px; }
.section-title span { display: block; font-family: var(--font-sans); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 3px; color: #888; margin-bottom: 20px; }

/* Collections Grid */
.collection-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 40px; }
.collection-card { position: relative; height: 600px; overflow: hidden; cursor: pointer; }
.collection-img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
.collection-card:hover .collection-img { transform: scale(1.08); }
.collection-info { position: absolute; bottom: 0; left: 0; width: 100%; padding: 50px 40px; background: linear-gradient(to top, rgba(0,0,0,0.7), transparent); color: var(--white); display: flex; justify-content: space-between; align-items: flex-end; }
.collection-name { font-size: 2rem; font-family: var(--font-serif); }
.collection-desc { font-family: var(--font-sans); font-size: 0.9rem; opacity: 0.8; margin-top: 10px; font-weight: 300; }
.collection-link { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; display: inline-flex; align-items: center; gap: 10px; opacity: 0; transform: translateX(-20px); transition: var(--transition); }
.collection-card:hover .collection-link { opacity: 1; transform: translateX(0); }

/* Generic Page Header */
.page-header { height: 50vh; background: var(--light-gray); display: flex; align-items: center; justify-content: center; text-align: center; margin-top: var(--header-height); position: relative; overflow: hidden;}
.page-header-bg { position: absolute; top:0; left:0; width:100%; height:100%; object-fit:cover; opacity: 0.15; filter: grayscale(100%); }
.page-header-content { position: relative; z-index: 1; }
.page-title { font-size: 3.5rem; margin-bottom: 10px; }
.breadcrumb { font-family: var(--font-sans); font-size: 0.85rem; color: #666; letter-spacing: 1px; text-transform: uppercase; }

/* Categories Filter */
.filter-nav { display: flex; justify-content: center; gap: 40px; margin-bottom: 60px; flex-wrap: wrap; }
.filter-btn { background: none; border: none; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 2px; color: #999; cursor: pointer; transition: var(--transition); padding-bottom: 8px; border-bottom: 1px solid transparent; }
.filter-btn.active, .filter-btn:hover { color: var(--primary-color); border-bottom-color: var(--primary-color); }

/* Products Grid */
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 50px 30px; }
.product-card { text-align: center; cursor: pointer; }
.product-img-wrapper { position: relative; overflow: hidden; margin-bottom: 25px; aspect-ratio: 1; background: var(--light-gray); }
.product-img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.product-card:hover .product-img { transform: scale(1.05); }
.product-name { font-family: var(--font-serif); font-size: 1.3rem; margin-bottom: 8px; transition: color 0.3s; }
.product-card:hover .product-name { color: #555; }
.product-category { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 2px; }

/* About / Innovation Layout */
.split-section { display: grid; grid-template-columns: 1fr 1fr; }
.split-content { padding: 10% 15%; display: flex; flex-direction: column; justify-content: center; background: var(--white); }
.split-content.bg-light { background: var(--light-gray); }
.split-title { font-size: 2.8rem; margin-bottom: 30px; }
.split-text { font-size: 1.1rem; color: #555; line-height: 1.8; margin-bottom: 40px; }
.split-image { position: relative; min-height: 600px; }
.split-image img { position: absolute; width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 992px) { .split-section { grid-template-columns: 1fr; } .split-image { min-height: 400px; } }

/* Footer */
.footer { background: var(--primary-color); color: var(--white); padding: 100px 5% 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 60px; max-width: 1800px; margin: 0 auto; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 80px; margin-bottom: 40px; }
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-logo { font-family: var(--font-serif); font-size: 2.5rem; margin-bottom: 25px; display: inline-block; }
.footer-text { color: #aaa; font-size: 0.95rem; line-height: 1.8; max-width: 350px; }
.footer-title { font-family: var(--font-sans); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 30px; color: #fff; }
.footer-links li { margin-bottom: 18px; color: #aaa; font-size: 0.9rem; }
.footer-links li span { color: #666; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1px; margin-right: 5px; }
.footer-links a { color: #aaa; font-size: 0.95rem; transition: var(--transition); display: inline-block; }
.footer-links a:hover { color: var(--white); transform: translateX(5px); display: inline-block; }
.newsletter-form { display: flex; margin-top: 20px; border-bottom: 1px solid rgba(255,255,255,0.3); padding-bottom: 12px; }
.newsletter-input { background: none; border: none; outline: none; color: var(--white); font-size: 0.95rem; width: 100%; font-family: var(--font-sans); }
.newsletter-input::placeholder { color: #666; }
.newsletter-btn { background: none; border: none; color: var(--white); cursor: pointer; text-transform: uppercase; font-size: 0.8rem; letter-spacing: 1px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; max-width: 1800px; margin: 0 auto; color: #666; font-size: 0.85rem; flex-wrap: wrap; gap: 20px; }

/* Stores List */
.stores-list { max-width: 1200px; margin: 0 auto; }
.store-item { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; padding: 40px 0; border-bottom: 1px solid var(--border-color); }
.store-city { font-family: var(--font-serif); font-size: 2rem; }
.store-details h4 { font-family: var(--font-sans); font-size: 1.2rem; font-weight: 500; margin-bottom: 10px; }
.store-details p { color: #666; line-height: 1.8; margin-bottom: 15px; }
@media (max-width: 768px) { .store-item { grid-template-columns: 1fr; gap: 20px; } }

/* Side Widget */
.side-widget-btn {
    position: fixed; right: 40px; bottom: 40px; width: 65px; height: 65px;
    background: var(--primary-color); color: var(--white); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3); cursor: pointer; z-index: 1500; transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.side-widget-btn:hover { transform: scale(1.1) translateY(-4px); }
.side-widget-btn svg { width: 28px; height: 28px; }

.side-widget-panel {
    position: fixed; top: 0; right: -50%; width: 50%; height: 100vh;
    background: var(--white); box-shadow: -10px 0 40px rgba(0,0,0,0.15);
    z-index: 2000; transition: right 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex; flex-direction: column;
}
@media (max-width: 768px) { .side-widget-panel { width: 100%; right: -100%; } }
.side-widget-panel.open { right: 0; }
.side-widget-close {
    position: absolute; top: 40px; left: -60px; width: 60px; height: 60px;
    background: var(--white); border: none; border-radius: 50% 0 0 50%;
    font-size: 36px; font-weight: 300; cursor: pointer;
    box-shadow: -6px 0 15px rgba(0,0,0,0.08); display: flex; align-items: center; justify-content: center; color: var(--primary-color);
    transition: var(--transition);
}
.side-widget-close:hover {
    padding-left: 10px;
}
.side-widget-panel iframe { width: 100%; height: 100%; border: none; flex-grow: 1; }

/* Product Detail Page Optimized */
.product-detail-layout { display: grid; grid-template-columns: 1fr 1fr; min-height: 90vh; margin-top: var(--header-height); }
.product-gallery { position: sticky; top: var(--header-height); height: calc(100vh - var(--header-height)); background: var(--light-gray); overflow: hidden; }
.product-main-img { width: 100%; height: 100%; object-fit: cover; }
.product-thumbs { position: absolute; bottom: 40px; left: 40px; display: flex; gap: 15px; z-index: 10; }
.thumb-item { width: 80px; height: 80px; border: 1px solid rgba(255,255,255,0.3); cursor: pointer; transition: var(--transition); overflow: hidden; background: var(--white); }
.thumb-item img { width: 100%; height: 100%; object-fit: cover; opacity: 0.6; transition: var(--transition); }
.thumb-item:hover img, .thumb-item.active img { opacity: 1; transform: scale(1.1); }
.thumb-item.active { border-color: var(--white); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }

.product-info-panel { padding: 80px 10%; display: flex; flex-direction: column; justify-content: center; }
.product-category-tag { font-family: var(--font-sans); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 3px; color: #888; margin-bottom: 20px; display: block; }
.product-info-title { font-size: 3.5rem; margin-bottom: 25px; letter-spacing: -1px; }
.product-info-summary { font-size: 1.2rem; color: #666; margin-bottom: 40px; font-weight: 300; line-height: 1.8; }

.product-spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-bottom: 50px; border-top: 1px solid var(--border-color); padding-top: 40px; }
.spec-item { display: flex; flex-direction: column; gap: 5px; }
.spec-label { font-family: var(--font-sans); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 2px; color: #aaa; }
.spec-value { font-size: 1.1rem; color: var(--primary-color); }

.product-detail-content { padding: 120px 0; border-top: 1px solid var(--border-color); }
.content-section-title { font-size: 2.2rem; margin-bottom: 60px; text-align: center; }
.content-body { max-width: 1000px; margin: 0 auto; color: #444; font-size: 1.1rem; line-height: 2; }
.content-body img { max-width: 100%; height: auto; margin: 40px 0; border-radius: 4px; }

@media (max-width: 1100px) {
    .product-detail-layout { grid-template-columns: 1fr; }
    .product-gallery { position: relative; height: 60vh; top: 0; }
    .product-info-panel { padding: 60px 5%; }
    .product-info-title { font-size: 2.5rem; }
}

@media (max-width: 1024px) {
    .section {
        padding: 80px 4%;
    }

    .section-title {
        font-size: 2.2rem;
        margin-bottom: 50px;
    }

    .collection-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 20px;
    }

    .collection-card {
        height: 420px;
    }

    .collection-info {
        padding: 24px 18px;
    }

    .page-title {
        font-size: 2.4rem;
    }

    .products-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 30px 18px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 68px;
    }

    .header-container {
        padding: 0 14px;
    }

    .logo img {
        max-height: 34px;
        width: auto;
    }

    .section {
        padding: 60px 14px;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 30px;
    }

    .hero {
        min-height: 76vh;
        height: auto;
        padding: 92px 0 40px;
    }

    .hero-subtitle {
        font-size: 0.85rem;
        letter-spacing: 1px;
        margin-bottom: 20px;
    }

    .btn {
        padding: 12px 26px;
        letter-spacing: 1px;
    }

    .collection-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }

    .collection-card {
        height: 320px;
    }

    .collection-name {
        font-size: 1.3rem;
    }

    .collection-desc {
        font-size: 0.78rem;
    }

    .page-header {
        height: 34vh !important;
    }

    .page-title {
        font-size: 1.6rem !important;
    }

    .breadcrumb {
        font-size: 0.72rem;
    }

    .filter-nav {
        gap: 14px;
        margin-bottom: 30px;
    }

    .filter-btn {
        font-size: 0.78rem;
        letter-spacing: 1px;
    }

    .split-content {
        padding: 40px 16px;
    }

    .split-title {
        font-size: 1.8rem;
        margin-bottom: 20px;
    }

    .split-text {
        font-size: 1rem;
        line-height: 1.7;
        margin-bottom: 20px;
    }

    .split-image {
        min-height: 260px;
    }

    .product-info-panel {
        padding: 34px 14px;
    }

    .product-info-title {
        font-size: 1.8rem;
    }

    .product-info-summary {
        font-size: 1rem;
        margin-bottom: 24px;
    }

    .product-spec-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        padding-top: 20px;
        margin-bottom: 24px;
    }
}

/* Animations Reveal */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
[data-reveal].revealed { opacity: 1; transform: translateY(0); }

/* Utility Classes */
.tw-uppercase { text-transform: uppercase; }
.tw-tracking-widest { letter-spacing: 0.2em; }
.tw-text-xs { font-size: 0.75rem; }
.tw-text-sm { font-size: 0.875rem; }
.tw-text-gray-400 { color: #9ca3af; }
.tw-mb-2 { margin-bottom: 0.5rem; }
.tw-mb-4 { margin-bottom: 1rem; }
.tw-font-light { font-weight: 300; }