/* reset & base */
* {
 margin: 0;
 padding: 0;
 box-sizing: border-box;
}

html {
 scroll-behavior: smooth;
}

body {
 font-family: 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
 background-color: #ffffff;
 color: #333;
 line-height: 1.8;
 font-size: 14px;
}

/* SIDANDA风格配色 - 极简黑白灰 */
:root {
 --primary: #000000;
 --primary-light: #666;
 --gray-light: #f5f5f5;
 --gray-border: #e0e0e0;
 --text-dark: #000;
 --text-gray: #999;
 --bg-cream: #faf9f7;
}

.container {
 max-width: 1400px;
 margin: 0 auto;
 padding: 0 60px;
}

/* 头部导航 - 透明/白色 */
.header {
 position: fixed;
 top: 0;
 left: 0;
 right: 0;
 z-index: 1000;
 transition: all 0.3s ease;
}

.header.transparent {
 background: transparent;
}

.header.scrolled {
 background: rgba(255,255,255,0.95);
 backdrop-filter: blur(10px);
 box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

.nav {
 display: flex;
 justify-content: space-between;
 align-items: center;
 height: 80px;
}

.logo {
 font-size: 24px;
 font-weight: 300;
 letter-spacing: 8px;
 color: #fff;
 text-decoration: none;
 text-transform: uppercase;
}

.header.scrolled .logo {
 color: #000;
}

.logo span {
 font-weight: 500;
}

.nav-links {
 display: flex;
 gap: 48px;
}

.nav-links a {
 text-decoration: none;
 color: #fff;
 font-size: 13px;
 letter-spacing: 2px;
 text-transform: uppercase;
 transition: opacity 0.3s;
 position: relative;
}

.header.scrolled .nav-links a {
 color: #333;
}

.nav-links a::after {
 content: '';
 position: absolute;
 bottom: -4px;
 left: 0;
 width: 0;
 height: 1px;
 background: currentColor;
 transition: width 0.3s;
}

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

/* 全屏轮播 */
.hero-slider {
 position: relative;
 height: 100vh;
 overflow: hidden;
}

.hero-slide {
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 opacity: 0;
 transition: opacity 1s ease;
 display: flex;
 align-items: center;
 justify-content: center;
}

.hero-slide.active {
 opacity: 1;
}

.hero-slide img {
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 object-fit: cover;
}

.hero-content {
 position: relative;
 z-index: 2;
 text-align: center;
 color: #fff;
}

.hero-content h1 {
 font-size: 72px;
 font-weight: 300;
 letter-spacing: 16px;
 margin-bottom: 24px;
 text-transform: uppercase;
}

.hero-content .subtitle {
 font-size: 18px;
 letter-spacing: 4px;
 margin-bottom: 40px;
 font-weight: 300;
}

.hero-content .desc {
 font-size: 14px;
 letter-spacing: 2px;
 max-width: 600px;
 margin: 0 auto 40px;
 line-height: 2;
}

.btn-white {
 display: inline-block;
 padding: 16px 48px;
 border: 1px solid #fff;
 color: #fff;
 text-decoration: none;
 font-size: 12px;
 letter-spacing: 3px;
 text-transform: uppercase;
 transition: all 0.3s;
 background: transparent;
 cursor: pointer;
}

.btn-white:hover {
 background: #fff;
 color: #000;
}

.btn-black {
 display: inline-block;
 padding: 16px 48px;
 border: 1px solid #000;
 color: #000;
 text-decoration: none;
 font-size: 12px;
 letter-spacing: 3px;
 text-transform: uppercase;
 transition: all 0.3s;
 background: transparent;
 cursor: pointer;
}

.btn-black:hover {
 background: #000;
 color: #fff;
}

/* 轮播指示器 */
.slider-dots {
 position: absolute;
 bottom: 40px;
 left: 50%;
 transform: translateX(-50%);
 display: flex;
 gap: 16px;
 z-index: 10;
}

.dot {
 width: 40px;
 height: 2px;
 background: rgba(255,255,255,0.3);
 cursor: pointer;
 transition: all 0.3s;
}

.dot.active {
 background: #fff;
}

/* 视频区域 */
.video-section {
 padding: 120px 0;
 text-align: center;
 background: #000;
 color: #fff;
}

.video-section h2 {
 font-size: 36px;
 font-weight: 300;
 letter-spacing: 8px;
 margin-bottom: 60px;
 text-transform: uppercase;
}

.video-container {
 max-width: 1000px;
 margin: 0 auto;
 position: relative;
}

.video-container video {
 width: 100%;
 border-radius: 0;
}

/* 产品分类展示 */
.category-section {
 padding: 120px 0;
 background: #fff;
}

.section-header {
 text-align: center;
 margin-bottom: 80px;
}

.section-header h2 {
 font-size: 32px;
 font-weight: 300;
 letter-spacing: 6px;
 margin-bottom: 16px;
 text-transform: uppercase;
}

.section-header .subtitle {
 color: #999;
 font-size: 14px;
 letter-spacing: 2px;
}

.category-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 30px;
}

.category-card {
 position: relative;
 overflow: hidden;
 aspect-ratio: 4/3;
 cursor: pointer;
}

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

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

.category-overlay {
 position: absolute;
 bottom: 0;
 left: 0;
 right: 0;
 padding: 60px 30px 30px;
 background: linear-gradient(transparent, rgba(0,0,0,0.7));
 color: #fff;
}

.category-overlay h3 {
 font-size: 16px;
 font-weight: 400;
 margin-bottom: 6px;
 letter-spacing: 2px;
}

.category-overlay p {
 font-size: 12px;
 opacity: 0.8;
 letter-spacing: 1px;
}

/* 产品网格 */
.products-section {
 padding: 120px 0;
 background: var(--bg-cream);
}

.filter-bar {
 display: flex;
 justify-content: center;
 gap: 40px;
 margin-bottom: 60px;
}

.filter-btn {
 background: none;
 border: none;
 font-size: 13px;
 letter-spacing: 2px;
 color: #999;
 cursor: pointer;
 padding: 8px 0;
 position: relative;
 transition: color 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
 color: #000;
}

.filter-btn.active::after {
 content: '';
 position: absolute;
 bottom: 0;
 left: 0;
 width: 100%;
 height: 1px;
 background: #000;
}

.product-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 30px;
}

.product-card {
 background: #fff;
 overflow: hidden;
 cursor: pointer;
 transition: box-shadow 0.3s;
}

.product-card:hover {
 box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.product-image {
 position: relative;
 aspect-ratio: 1;
 overflow: hidden;
 background: #f5f5f5;
}

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

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

.product-info {
 padding: 24px;
 text-align: center;
}

.product-name {
 font-size: 14px;
 font-weight: 400;
 margin-bottom: 8px;
 letter-spacing: 1px;
}

.product-price {
 font-size: 16px;
 color: #666;
}

/* 品牌故事区域 */
.story-section {
 padding: 0;
 display: grid;
 grid-template-columns: 1fr 1fr;
 min-height: 600px;
}

.story-image {
 position: relative;
 overflow: hidden;
}

.story-image img {
 width: 100%;
 height: 100%;
 object-fit: cover;
}

.story-content {
 display: flex;
 flex-direction: column;
 justify-content: center;
 padding: 80px 100px;
 background: #fff;
}

.story-content h2 {
 font-size: 32px;
 font-weight: 300;
 letter-spacing: 6px;
 margin-bottom: 40px;
 text-transform: uppercase;
}

.story-content p {
 font-size: 15px;
 line-height: 2.2;
 color: #666;
 margin-bottom: 24px;
}

/* 新闻区域 */
.news-section {
 padding: 120px 0;
 background: #fff;
}

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

.news-card {
 cursor: pointer;
}

.news-image {
 aspect-ratio: 16/10;
 overflow: hidden;
 margin-bottom: 24px;
}

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

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

.news-date {
 font-size: 12px;
 color: #999;
 letter-spacing: 2px;
 margin-bottom: 12px;
}

.news-title {
 font-size: 18px;
 font-weight: 400;
 line-height: 1.6;
 margin-bottom: 16px;
}

.news-excerpt {
 font-size: 14px;
 color: #666;
 line-height: 1.8;
}

/* 页脚 */
.footer {
 background: #000;
 color: #fff;
 padding: 80px 0 40px;
}

.footer-grid {
 display: grid;
 grid-template-columns: 2fr 1fr 1fr 1fr;
 gap: 60px;
 margin-bottom: 60px;
}

.footer-brand .logo {
 color: #fff;
 margin-bottom: 24px;
 display: inline-block;
}

.footer-brand p {
 color: #999;
 font-size: 14px;
 line-height: 1.8;
}

.footer-column h4 {
 font-size: 13px;
 letter-spacing: 2px;
 text-transform: uppercase;
 margin-bottom: 24px;
 font-weight: 500;
}

.footer-column ul {
 list-style: none;
}

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

.footer-column a {
 color: #999;
 text-decoration: none;
 font-size: 14px;
 transition: color 0.3s;
}

.footer-column a:hover {
 color: #fff;
}

.footer-bottom {
 border-top: 1px solid #333;
 padding-top: 40px;
 display: flex;
 justify-content: space-between;
 align-items: center;
}

.footer-bottom p {
 color: #666;
 font-size: 13px;
}

/* 产品详情页 */
.product-detail {
 padding-top: 120px;
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 80px;
 max-width: 1400px;
 margin: 0 auto;
 padding-bottom: 120px;
}

.product-gallery {
 position: sticky;
 top: 120px;
}

.main-image {
 aspect-ratio: 1;
 background: #f5f5f5;
 margin-bottom: 20px;
 overflow: hidden;
}

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

.thumbnail-list {
 display: flex;
 gap: 12px;
}

.thumbnail {
 width: 80px;
 height: 80px;
 background: #f5f5f5;
 cursor: pointer;
 overflow: hidden;
}

.thumbnail img {
 width: 100%;
 height: 100%;
 object-fit: cover;
}

.thumbnail.active {
 border: 1px solid #000;
}

.product-info-detail h1 {
 font-size: 28px;
 font-weight: 400;
 margin-bottom: 16px;
 letter-spacing: 2px;
}

.product-info-detail .price {
 font-size: 24px;
 color: #000;
 margin-bottom: 32px;
}

.product-info-detail .description {
 font-size: 14px;
 line-height: 2;
 color: #666;
 margin-bottom: 40px;
}

.product-meta {
 margin-bottom: 40px;
}

.meta-row {
 display: flex;
 margin-bottom: 20px;
}

.meta-label {
 width: 100px;
 color: #999;
 font-size: 13px;
}

.meta-value {
 flex: 1;
 font-size: 14px;
}

.meta-options {
 display: flex;
 gap: 12px;
 flex-wrap: wrap;
}

.option-btn {
 padding: 10px 20px;
 border: 1px solid #ddd;
 background: #fff;
 cursor: pointer;
 font-size: 13px;
 transition: all 0.3s;
}

.option-btn:hover,
.option-btn.active {
 border-color: #000;
 background: #000;
 color: #fff;
}

.action-buttons {
 display: flex;
 gap: 16px;
}

.btn-large {
 flex: 1;
 padding: 18px 40px;
 font-size: 13px;
 letter-spacing: 2px;
}

/* 响应式 */
@media (max-width: 1200px) {
 .container {
 padding: 0 40px;
 }
 
 .category-grid,
 .product-grid {
 grid-template-columns: repeat(2, 1fr);
 }
 
 .news-grid {
 grid-template-columns: repeat(2, 1fr);
 }
}

@media (max-width: 768px) {
 .container {
 padding: 0 20px;
 }
 
 .nav-links {
 display: none;
 }
 
 .hero-content h1 {
 font-size: 36px;
 letter-spacing: 8px;
 }
 
 .category-grid,
 .product-grid,
 .news-grid {
 grid-template-columns: 1fr;
 }
 
 .story-section {
 grid-template-columns: 1fr;
 }
 
 .story-content {
 padding: 60px 40px;
 }
 
 .product-detail {
 grid-template-columns: 1fr;
 padding-top: 100px;
 }
 
 .product-gallery {
 position: relative;
 top: 0;
 }
 
 .footer-grid {
 grid-template-columns: 1fr;
 gap: 40px;
 }
}