/* 
 * Project: High-End Fashion Showcase
 * Theme: Pure, Elegant, Minimalist
 * Author: HAISNAP
 */

/* =========================================
   1. Variables & Design Tokens
   ========================================= */
:root {
    /* Color Palette */
    --color-bg-main: #F8F9FA;      /* 高级灰 */
    --color-bg-alt: #F5F1E8;       /* 米白 */
    --color-accent: #E6B8B7;       /* 陶土粉 */
    --color-dark: #2C2C2C;         /* 炭黑 */
    --color-text-main: #333333;    /* 深灰 */
    --color-text-light: #666666;   /* 浅灰 */
    --color-white: #FFFFFF;

    /* Typography */
    --font-en-serif: 'Playfair Display', serif;
    --font-cn-serif: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
    --font-cn-sans: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 32px;
    --spacing-lg: 64px;
    --spacing-xl: 120px;

    /* Layout */
    --container-width: 1280px;
    --header-height: 80px;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-smooth: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500&family=Noto+Serif+SC:wght@400;700&family=Playfair+Display:ital,wght@0,400;0,600;1,400&display=swap');

/* =========================================
   2. Reset & Base Styles
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background-color: var(--color-bg-main);
    color: var(--color-text-main);
    font-family: var(--font-cn-sans);
    font-weight: 300;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Typography Helpers */
h1, h2, h3, h4 {
    font-family: var(--font-en-serif);
    color: var(--color-dark);
    font-weight: 400;
}

.cn-title {
    font-family: var(--font-cn-serif);
}

.text-center { text-align: center; }
.text-uppercase { text-transform: uppercase; }
.font-serif { font-family: var(--font-en-serif); }

/* =========================================
   3. Layout Components
   ========================================= */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

.grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    letter-spacing: 0.05em;
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background-color: var(--color-accent);
}

/* =========================================
   4. Navigation
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    transition: background-color var(--transition-fast), padding var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
}

.navbar.scrolled {
    background-color: rgba(248, 249, 250, 0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    backdrop-filter: blur(10px);
}

.logo {
    font-family: var(--font-en-serif);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-dark);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-family: var(--font-cn-serif);
    font-size: 1rem;
    color: var(--color-text-main);
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

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

.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.hamburger span {
    width: 24px;
    height: 1px;
    background-color: var(--color-dark);
    transition: var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--color-bg-main);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right var(--transition-smooth);
    box-shadow: -5px 0 15px rgba(0,0,0,0.05);
}

.mobile-menu.open {
    right: 0;
}

.mobile-menu a {
    font-size: 1.25rem;
    margin: var(--spacing-sm) 0;
    font-family: var(--font-cn-serif);
}

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* =========================================
   5. Hero Section (Index)
   ========================================= */
.hero {
    height: 100vh;
    width: 100%;
    position: relative;
    overflow: hidden;
}

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

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    background-size: cover;
    background-position: center;
}

.slide.active {
    opacity: 1;
}

.slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0,0,0,0.2), rgba(0,0,0,0.4));
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
    color: var(--color-white);
    width: 90%;
}

.hero-title {
    font-family: var(--font-cn-serif);
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.2em;
    font-weight: 400;
    color: var(--color-white);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    animation: bounce 2s infinite;
    cursor: pointer;
}

.arrow-down {
    width: 30px;
    height: 30px;
    border-right: 2px solid var(--color-white);
    border-bottom: 2px solid var(--color-white);
    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); }
}

/* =========================================
   6. Featured Collections (Index)
   ========================================= */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    background: #fff;
}

.card-img-wrapper {
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
    position: relative;
}

.card-img-wrapper img {
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card:hover .card-img-wrapper img {
    transform: scale(1.05);
}

.card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
    color: var(--color-white);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-fast);
}

.card:hover .card-overlay {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================
   7. Seasonal Scroll (Index)
   ========================================= */
.scroll-container {
    display: flex;
    overflow-x: auto;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
}

.scroll-container::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

.season-card {
    min-width: 400px;
    flex: 0 0 auto;
    scroll-snap-align: center;
    position: relative;
}

.season-img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.season-desc {
    margin-top: var(--spacing-sm);
    font-family: var(--font-cn-serif);
    color: var(--color-text-light);
    font-size: 0.9rem;
    text-align: center;
}

/* =========================================
   8. Navigation Area (Index)
   ========================================= */
.nav-icons {
    display: flex;
    justify-content: center;
    gap: 80px;
    padding: var(--spacing-lg) 0;
}

.nav-icon-item {
    text-align: center;
    cursor: pointer;
    group: hover;
}

.icon-circle {
    width: 80px;
    height: 80px;
    border: 1px solid var(--color-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    transition: var(--transition-fast);
}

.nav-icon-item:hover .icon-circle {
    background-color: var(--color-dark);
    color: var(--color-white);
}

/* =========================================
   9. Philosophy Page
   ========================================= */
.philosophy-hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background-color: var(--color-bg-alt);
    position: relative;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.philosophy-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.philosophy-text {
    position: relative;
    z-index: 1;
    background: rgba(255,255,255,0.9);
    padding: var(--spacing-lg);
    max-width: 600px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

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

.principle-item img {
    aspect-ratio: 3/4;
    margin-bottom: var(--spacing-sm);
    filter: grayscale(100%);
    transition: var(--transition-fast);
}

.principle-item:hover img {
    filter: grayscale(0%);
}

.masonry-grid {
    column-count: 3;
    column-gap: var(--spacing-md);
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: var(--spacing-md);
    position: relative;
}

.masonry-item img {
    width: 100%;
    border-radius: 2px;
}

/* =========================================
   10. Collections Page
   ========================================= */
.collections-layout {
    display: flex;
    min-height: 100vh;
    padding-top: var(--header-height);
}

.sidebar {
    width: 250px;
    padding: var(--spacing-lg);
    position: fixed;
    height: calc(100vh - var(--header-height));
    border-right: 1px solid #eee;
    background: var(--color-bg-main);
    z-index: 10;
}

.sidebar ul li {
    margin-bottom: var(--spacing-md);
    cursor: pointer;
    font-family: var(--font-cn-serif);
    color: var(--color-text-light);
    transition: var(--transition-fast);
}

.sidebar ul li.active,
.sidebar ul li:hover {
    color: var(--color-dark);
    padding-left: 10px;
    border-left: 2px solid var(--color-accent);
}

.main-content {
    margin-left: 250px;
    padding: var(--spacing-lg);
    width: calc(100% - 250px);
}

.collection-hero {
    width: 100%;
    height: 400px;
    object-fit: cover;
    margin-bottom: var(--spacing-lg);
}

.grid-3x3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.story-container {
    display: flex;
    overflow-x: auto;
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
}

.story-card {
    min-width: 600px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

/* =========================================
   11. Details Page
   ========================================= */
.details-interactive {
    display: flex;
    gap: var(--spacing-md);
    height: 80vh;
    align-items: center;
}

.thumbnails {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 150px;
}

.thumbnail {
    width: 100%;
    aspect-ratio: 1/1;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-fast);
    opacity: 0.6;
}

.thumbnail.active,
.thumbnail:hover {
    border-color: var(--color-accent);
    opacity: 1;
}

.main-detail-view {
    flex: 1;
    height: 100%;
    position: relative;
    overflow: hidden;
    background: #f0f0f0;
}

.main-detail-view img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.craft-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.craft-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.craft-item img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 50%;
}

/* =========================================
   12. Footer
   ========================================= */
footer {
    background-color: #F0F0F0;
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid #E0E0E0;
    font-family: var(--font-en-serif);
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* =========================================
   13. Animations & Utility
   ========================================= */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================
   14. Responsive Design
   ========================================= */
/* Tablet */
@media (max-width: 1199px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    .featured-grid,
    .principles-grid,
    .masonry-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .masonry-grid { column-count: 2; }
    .nav-icons { gap: 40px; }
    .card-img-wrapper { aspect-ratio: 3/4; }
    .grid-3x3 { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --spacing-xl: 60px;
        --spacing-lg: 32px;
    }

    .nav-links { display: none; }
    .hamburger { display: flex; }
    
    .hero-title { font-size: 2rem; }
    
    .featured-grid,
    .principles-grid,
    .grid-3x3,
    .craft-grid {
        grid-template-columns: 1fr;
    }
    
    .masonry-grid { column-count: 1; }
    
    .season-card { min-width: 85vw; }
    
    .nav-icons { 
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .collections-layout { flex-direction: column; }
    .sidebar { 
        position: relative; 
        width: 100%; 
        height: auto; 
        overflow-x: auto;
        border-right: none;
        border-bottom: 1px solid #eee;
        display: flex;
        padding: var(--spacing-sm);
        white-space: nowrap;
    }
    .sidebar ul { display: flex; gap: 20px; }
    .sidebar ul li { margin-bottom: 0; padding: 5px; }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: var(--spacing-sm);
    }
    
    .details-interactive {
        flex-direction: column-reverse;
        height: auto;
    }
    .thumbnails {
        flex-direction: row;
        width: 100%;
        overflow-x: auto;
    }
    .thumbnail { width: 80px; }
    .main-detail-view { height: 400px; width: 100%; }
    
    .story-card {
        min-width: 90vw;
        grid-template-columns: 1fr;
    }
    
    .philosophy-bg {
        width: 100%;
        opacity: 0.3;
    }
}