/* 性能优化基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --ac-silver: #e8e8e8;
    --ac-silver-dark: #c0c0c0;
    --ac-silver-light: #f8f8f8;
    --ac-silver-accent: #a8a8a8;
    --ac-gold: #d4af37;
    --ac-dark: #1a1a1a;
    --ac-text: #333333;
    --ac-text-light: #666666;
    --ac-white: #ffffff;
    --ac-container-width: 1300px;
    --ac-section-spacing: 100px;
    --ac-mobile-spacing: 60px;
    --ac-border-radius: 8px;
    --ac-transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ★ 修复补丁：删除 scroll-behavior:smooth，防止 scrollIntoView 冲突 */
html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
    color: var(--ac-text);
    background-color: #f5f5f5;
    line-height: 1.6;
    font-family: 'Playfair Display', serif;
    background: linear-gradient(135deg, #f9f9f9 0%, #f0f0f0 100%);
}

/* ============================================================
   高奢导航栏样式 - 沉浸式视频交互效果
============================================================ */

/* 基础导航栏样式 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--ac-transition);
    padding: 25px 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 视频区域时的透明导航 */
.site-header.transparent {
    background: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-header.transparent .brand {
    color: var(--ac-white);
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 4px;
}

.site-header.transparent .nav a {
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    font-size: 0.95rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: var(--ac-transition);
    text-decoration: none;
}

.site-header.transparent .nav a:hover {
    color: var(--ac-white);
}

.site-header.transparent .nav a:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--ac-white);
    transition: width 0.3s ease;
}

.site-header.transparent .nav a:hover:after {
    width: 100%;
}

/* 滚动后的白色导航 */
.site-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    padding: 15px 0;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.08);
}

.site-header.scrolled .brand {
    color: var(--ac-dark);
    font-size: 1.6rem;
    letter-spacing: 3px;
    text-shadow: none;
}

.site-header.scrolled .nav a {
    color: var(--ac-text-light);
    font-size: 0.9rem;
    text-decoration: none;
}

.site-header.scrolled .nav a:hover {
    color: var(--ac-dark);
}

.site-header.scrolled .nav a:after {
    background: var(--ac-dark);
}

/* 导航布局 */
.header {
    max-width: var(--ac-container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-family: 'Cinzel', serif;
    text-decoration: none;
    font-weight: 700;
    transition: var(--ac-transition);
}

.nav {
    display: flex;
    gap: 40px;
}

.nav a {
    text-decoration: none;
    font-family: 'Cinzel', serif;
    font-weight: 400;
    transition: var(--ac-transition);
}

/* 容器样式 */
.ac_container {
    max-width: var(--ac-container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 区域间距控制 */
.ac_features-section,
.ac_featured-section,
.ac_collections-section,
.ac_articles-section,
.ac_testimonials-section {
    padding: var(--ac-section-spacing) 0;
}

/* HERO视频部分 - 优化性能 */
.ac_video-container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}


.ac_video-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    object-fit: cover;
    transform: translate3d(-50%, -50%, 0) scale(1.1);
    will-change: transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

.ac_video-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--ac-white);
    font-size: 1.2rem;
    z-index: 10;
}

.ac_silver-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.1) 0%,
        rgba(192, 192, 192, 0.2) 50%,
        rgba(255, 255, 255, 0.1) 100%
    );
    z-index: 1;
}

.ac_overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgb(0 0 0 / 16%) 0%, rgba(0,0,0,0.6) 100%);
    z-index: 1;
}

.ac_hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--ac-white);
    top: 50%;
    transform: translateY(-50%);
    padding: 0 20px;
    max-width: var(--ac-container-width);
    margin: 0 auto;
}

.ac_logo {
    font-family: 'Cinzel', serif;
    font-size: 25px;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: 8px;
    color: var(--ac-silver);
    text-transform: uppercase;
    text-shadow: 0 0 20px rgba(255,255,255,0.3);
    position: relative;
}

.ac_logo:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--ac-silver), transparent);
}

.ac_slogan {
    font-size: clamp(0.9rem, 2vw, 1.4rem);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
    font-weight: 300;
    letter-spacing: 3px;
    color: var(--ac-silver);
    font-style: italic;
}

.ac_cta-button {
    background: transparent;
    color: var(--ac-silver);
    border: 2px solid var(--ac-silver);
    padding: clamp(12px, 3vw, 10px) clamp(30px, 5vw, 50px);
    border-radius: 0;
    cursor: pointer;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    font-weight: 300;
    transition: var(--ac-transition);
    letter-spacing: 3px;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
    font-family: 'Cinzel', serif;
    will-change: transform;
    text-decoration: none;
    display: inline-block;
}

.ac_cta-button:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: all 0.6s;
}

.ac_cta-button:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    text-decoration: none;
    color: var(--ac-silver);
}

.ac_cta-button:hover:before {
    left: 100%;
}

/* 章节标题 */
.ac_section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.ac_section-title h2 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    color: var(--ac-dark);
    margin-bottom: 20px;
    font-weight: 400;
    letter-spacing: 4px;
    text-transform: uppercase;
    font-family: 'Cinzel', serif;
    position: relative;
    display: inline-block;
}

.ac_section-title h2:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--ac-silver-accent), transparent);
}

.ac_section-title p {
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--ac-text-light);
    max-width: 700px;
    margin: 0 auto;
    font-weight: 300;
    letter-spacing: 1px;
    line-height: 1.8;
}
/* 限量上新板块 */
.ac_limited-section {
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    color: var(--ac-white);
    position: relative;
    overflow: hidden;
    padding: var(--ac-section-spacing) 0;
}

.ac_limited-section:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><path d="M50,20 C60,10 80,10 90,20 C100,30 100,50 90,60 C80,70 60,70 50,60 C40,70 20,70 10,60 C0,50 0,30 10,20 C20,10 40,10 50,20 Z" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="2"/></svg>');
    opacity: 0.3;
}

.ac_limited-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.ac_limited-header h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 20px;
    font-weight: 400;
    letter-spacing: 5px;
    font-family: 'Cinzel', serif;
    color: var(--ac-silver);
}

.ac_limited-header p {
    font-size: clamp(1rem, 2vw, 1.3rem);
    max-width: 700px;
    margin: 0 auto;
    color: rgba(255,255,255,0.8);
    font-weight: 300;
    letter-spacing: 1px;
}

.ac_limited-countdown {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.ac_countdown-item {
    text-align: center;
    background: rgba(255,255,255,0.1);
    padding: 20px;
    border-radius: var(--ac-border-radius);
    min-width: 80px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.ac_countdown-value {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--ac-silver);
    font-family: 'Cinzel', serif;
}

.ac_countdown-label {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    margin-top: 5px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ac_limited-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    position: relative;
    z-index: 1;
}

.ac_limited-card {
    background: rgba(255,255,255,0.05);
    border-radius: var(--ac-border-radius);
    overflow: hidden;
    transition: var(--ac-transition);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    position: relative;
    will-change: transform;
}

.ac_limited-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.ac_limited-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--ac-gold);
    color: var(--ac-dark);
    padding: 8px 15px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
    letter-spacing: 2px;
    font-family: 'Cinzel', serif;
    border-radius: 4px;
}

.ac_limited-img {
    height: 300px;
    background: linear-gradient(135deg, #2a2a2a 0%, #3a3a3a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ac-silver);
    font-size: 3.5rem;
    position: relative;
    overflow: hidden;
}

.ac_limited-info {
    padding: 25px;
    text-align: center;
}

.ac_limited-category {
    color: var(--ac-gold);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-family: 'Cinzel', serif;
}

.ac_limited-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    font-weight: 400;
    color: var(--ac-white);
    letter-spacing: 1px;
    font-family: 'Cinzel', serif;
    line-height: 1.3;
}

.ac_limited-description {
    color: rgba(255,255,255,0.8);
    font-size: 1rem;
    margin-bottom: 20px;
    line-height: 1.6;
    font-weight: 300;
}

.ac_limited-price {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--ac-silver);
    margin-bottom: 15px;
    letter-spacing: 1px;
    font-family: 'Cinzel', serif;
}

.ac_stock-info {
    color: #999;
    font-size: 14px;
    margin: 10px 0;
}

.ac_sold-out {
    color: #e11;
    font-weight: 600;
}

.ac_limited-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 20px;
}

/* 按钮样式 - 统一优化 */
.ac_btn {
    padding: 12px 24px;
    border-radius: var(--ac-border-radius);
    font-weight: 400;
    cursor: pointer;
    transition: var(--ac-transition);
    border: none;
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-family: 'Cinzel', serif;
    position: relative;
    overflow: hidden;
    will-change: transform;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    min-width: 140px;
}

.ac_btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: all 0.6s;
}

.ac_btn:hover:before {
    left: 100%;
}

.ac_btn-primary {
    background: var(--ac-gold);
    color: var(--ac-dark);
    border: 1px solid var(--ac-gold);
}

.ac_btn-primary:hover {
    background: #e6c158;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(212, 175, 55, 0.3);
    text-decoration: none;
    color: var(--ac-dark);
}

.ac_btn-outline {
    background: transparent;
    border: 1px solid var(--ac-silver);
    color: var(--ac-silver);
}

.ac_btn-outline:hover {
    background: var(--ac-silver);
    color: var(--ac-dark);
    transform: translateY(-2px);
    text-decoration: none;
}

.ac_btn-disabled {
    background: #ccc;
    color: #666;
    cursor: not-allowed;
    border: 1px solid #aaa;
    transform: none !important;
}

.ac_btn-disabled:hover {
    background: #ccc;
    color: #666;
    transform: none !important;
    box-shadow: none !important;
}

/* 产品网格 */
.ac_products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.ac_product-card {
    background: var(--ac-white);
    border-radius: var(--ac-border-radius);
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    transition: var(--ac-transition);
    position: relative;
    will-change: transform;
}

.ac_product-card:hover {
    transform: translateY(-20px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.ac_product-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--ac-dark);
    color: var(--ac-silver);
    padding: 8px 20px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
    letter-spacing: 2px;
    font-family: 'Cinzel', serif;
    border-radius: 4px;
}

.ac_product-img {
    height: 300px;
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ac-silver-accent);
    font-size: 3.5rem;
    position: relative;
    overflow: hidden;
}

.ac_product-img:after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.03) 100%);
}

.ac_product-info {
    padding: 30px 25px;
    text-align: center;
    background: var(--ac-white);
    position: relative;
}

.ac_product-info:before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--ac-silver-accent), transparent);
}

.ac_product-category {
    color: var(--ac-text-light);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-family: 'Cinzel', serif;
}

.ac_product-title {
    font-size: 1.5rem;
    margin-bottom: 18px;
    font-weight: 400;
    color: var(--ac-dark);
    letter-spacing: 1px;
    font-family: 'Cinzel', serif;
    line-height: 1.3;
}

.ac_product-description {
    color: var(--ac-text-light);
    font-size: 1rem;
    margin-bottom: 25px;
    line-height: 1.7;
    font-weight: 300;
}

.ac_product-price {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--ac-dark);
    margin-bottom: 30px;
    letter-spacing: 1px;
    font-family: 'Cinzel', serif;
}

.ac_product-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}
/* 特性部分 */
.ac_features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.ac_feature-card {
    background: var(--ac-white);
    padding: 40px 30px;
    text-align: center;
    transition: var(--ac-transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
    will-change: transform;
    border-radius: var(--ac-border-radius);
}

.ac_feature-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, var(--ac-silver-dark), var(--ac-silver-light));
}

.ac_feature-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.ac_feature-icon {
    font-size: 2.5rem;
    color: var(--ac-silver-dark);
    margin-bottom: 30px;
    opacity: 0.8;
}

.ac_feature-title {
    font-size: 1.4rem;
    margin-bottom: 20px;
    font-weight: 400;
    color: var(--ac-dark);
    letter-spacing: 1px;
    font-family: 'Cinzel', serif;
}

.ac_feature-description {
    color: var(--ac-text-light);
    line-height: 1.7;
    font-weight: 300;
}

/* 收藏系列 */
.ac_collections-section {
    background: linear-gradient(135deg, #f0f0f0 0%, #e8e8e8 100%);
}

.ac_collections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.ac_collection-card {
    background: var(--ac-white);
    overflow: hidden;
    transition: var(--ac-transition);
    position: relative;
    height: 450px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    will-change: transform;
    border-radius: var(--ac-border-radius);
}

.ac_collection-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.ac_collection-img {
    height: 100%;
    background: linear-gradient(135deg, #e8e8e8 0%, #d8d8d8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ac-silver-accent);
    font-size: 3.5rem;
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
}

.ac_collection-content {
    padding: 30px;
    position: relative;
    z-index: 2;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
    color: var(--ac-white);
}

.ac_collection-title {
    font-size: 1.8rem;
    margin-bottom: 20px;
    font-weight: 400;
    letter-spacing: 2px;
    font-family: 'Cinzel', serif;
}

.ac_collection-description {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 25px;
    font-weight: 300;
    opacity: 0.9;
}

/* 文章部分 */
.ac_articles-section {
    background: var(--ac-white);
}

.ac_articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.ac_article-card {
    background: #f9f9f9;
    overflow: hidden;
    transition: var(--ac-transition);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    will-change: transform;
    border-radius: var(--ac-border-radius);
}

.ac_article-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.ac_article-img {
    height: 200px;
    background: linear-gradient(135deg, #e8e8e8 0%, #d8d8d8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ac-silver-accent);
    font-size: 2.5rem;
}

.ac_article-content {
    padding: 25px;
}

.ac_article-date {
    color: var(--ac-text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
    font-weight: 400;
    letter-spacing: 1px;
}

.ac_article-title {
    font-size: 1.4rem;
    margin-bottom: 18px;
    font-weight: 400;
    line-height: 1.4;
    color: var(--ac-dark);
    letter-spacing: 1px;
    font-family: 'Cinzel', serif;
}

.ac_article-excerpt {
    color: var(--ac-text-light);
    line-height: 1.7;
    margin-bottom: 25px;
    font-weight: 300;
}

/* 阅读更多链接 */
.ac_read-more {
    color: var(--ac-dark);
    text-decoration: none;
    font-weight: 400;
    display: inline-flex;
    align-items: center;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.9rem;
    font-family: 'Cinzel', serif;
    transition: var(--ac-transition);
}

.ac_read-more i {
    margin-left: 10px;
    transition: transform 0.3s ease;
}

.ac_read-more:hover {
    color: var(--ac-gold);
    text-decoration: none;
}

.ac_read-more:hover i {
    transform: translateX(8px);
}

/* 推荐部分 */
.ac_testimonials-section {
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    color: var(--ac-silver);
    padding: var(--ac-section-spacing) 0;
}

.ac_testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.ac_testimonial-card {
    background: rgba(255,255,255,0.05);
    padding: 40px 30px;
    position: relative;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--ac-transition);
    will-change: transform;
    border-radius: var(--ac-border-radius);
}

.ac_testimonial-card:hover {
    transform: translateY(-10px);
}

.ac_testimonial-card:before {
    content: "";
    position: absolute;
    top: 20px;
    left: 30px;
    font-size: 4rem;
    color: rgba(255,255,255,0.1);
    font-family: Georgia, serif;
    line-height: 1;
}

.ac_testimonial-text {
    font-style: italic;
    margin-bottom: 30px;
    line-height: 1.8;
    color: rgba(255,255,255,0.9);
    font-weight: 300;
    font-size: 1.1rem;
}

.ac_testimonial-author {
    display: flex;
    align-items: center;
}

.ac_author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--ac-silver);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ac-dark);
    font-weight: 400;
    margin-right: 15px;
    font-size: 1.2rem;
    font-family: 'Cinzel', serif;
}

.ac_author-info h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--ac-white);
    font-weight: 400;
    font-family: 'Cinzel', serif;
}

.ac_author-info p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    font-weight: 300;
}

.ac_section-footer {
    text-align: center;
    margin-top: 40px;
}
/* 响应式设计 */
@media (max-width: 1200px) {
    :root {
        --ac-section-spacing: 80px;
    }
}

@media (max-width: 768px) {
    :root {
        --ac-section-spacing: 60px;
        --ac-mobile-spacing: 40px;
    }
    
    .ac_features-section,
    .ac_featured-section,
    .ac_collections-section,
    .ac_articles-section,
    .ac_testimonials-section {
        padding: var(--ac-mobile-spacing) 0;
    }
    
    .ac_section-title {
        margin-bottom: 40px;
    }
    
    .ac_limited-countdown {
        gap: 10px;
    }
    
    .ac_countdown-item {
        min-width: 70px;
        padding: 15px;
    }
    
    .ac_limited-actions,
    .ac_product-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .ac_btn {
        width: 200px;
        max-width: 100%;
    }
    
    .ac_features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .ac_feature-card {
        padding: 30px 20px;
    }

    /* 导航响应式 */
    .site-header {
        padding: 20px 0;
    }
    
    .site-header.scrolled {
        padding: 12px 0;
    }
    
    .site-header.transparent .brand {
        font-size: 1.5rem;
    }
    
    .site-header.scrolled .brand {
        font-size: 1.4rem;
    }
    
    .nav {
        gap: 25px;
    }
    
    .nav a {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .ac_container {
        padding: 0 15px;
    }
    
    .ac_limited-grid,
    .ac_products-grid,
    .ac_collections-grid,
    .ac_articles-grid,
    .ac_testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .ac_limited-img,
    .ac_product-img {
        height: 250px;
    }
    
    .ac_collection-card {
        height: 400px;
    }
    
    .ac_testimonial-author {
        flex-direction: column;
        text-align: center;
    }
    
    .ac_author-avatar {
        margin-right: 0;
        margin-bottom: 10px;
    }

    /* 导航响应式 */
    .nav {
        gap: 15px;
    }
    
    .nav a {
        font-size: 0.8rem;
    }
    
    .site-header.transparent .brand {
        font-size: 1.3rem;
    }
    
    .site-header.scrolled .brand {
        font-size: 1.2rem;
    }
}

/* ============================================================
   ⭐ 限量臻品倒计时样式修复（官方补丁）
============================================================ */
.ac_limited-countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    margin: 30px 0 50px 0;
}

.ac_countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.10);
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    padding: 18px 14px;
    min-width: 70px;
    border-radius: 6px;
    transition: none !important;
}

.ac_countdown-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--ac-silver);
    line-height: 1;
}

.ac_countdown-label {
    margin-top: 6px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.75);
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .ac_limited-countdown {
        gap: 10px;
        flex-wrap: wrap;
    }
}

/* ============================================================
   ⭐ 空状态补丁（核心修复：数据为空时不塌陷、不隐藏内容）
============================================================ */
.ac_limited-grid:empty,
.ac_products-grid:empty,
.ac_collections-grid:empty,
.ac_articles-grid:empty {
    min-height: 200px; /* 保证版块可见，不会高度为0 */
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0.35;
}

.ac_limited-grid:empty::after,
.ac_products-grid:empty::after,
.ac_collections-grid:empty::after,
.ac_articles-grid:empty::after {
    content: "暂无内容";
    font-size: 1rem;
    letter-spacing: 2px;
    color: #777;
}

/* ============================================================
   ⭐ 修正 HERO 视频在移动端 100vh 不准确的问题
============================================================ */
.ac_video-container {
    height: 100svh; /* 更准确的移动端视口高度 */
}
/* ============================================================
   额外的增强补充（保持视觉稳定性）
============================================================ */

/* 让所有卡片渲染更平滑 */
.ac_product-card,
.ac_limited-card,
.ac_feature-card,
.ac_article-card,
.ac_collection-card,
.ac_testimonial-card {
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* 防止 hover 时外层抖动 */
.ac_product-card:hover,
.ac_limited-card:hover,
.ac_collection-card:hover,
.ac_feature-card:hover {
    will-change: transform;
}

/* 图片加载过渡效果 */
.ac_product-img img,
.ac_limited-img img,
.ac_collection-img img,
.ac_article-img img {
    transition: opacity .4s ease, transform .4s ease;
}

/* 加载时隐藏图片闪烁 */
.ac_product-img img:not([src]),
.ac_limited-img img:not([src]),
.ac_collection-img img:not([src]),
.ac_article-img img:not([src]) {
    opacity: 0;
}


/* ============================================================
  按钮增强（视觉更精致 & 鼠标移动更丝滑）
============================================================ */
.ac_btn {
    transition: background .3s ease, color .3s ease, transform .3s ease;
}

.ac_btn-primary:hover {
    transform: translateY(-3px);
}

.ac_btn-outline:hover {
    transform: translateY(-3px);
}


/* ============================================================
   让布局在加载阶段更稳定（避免首次重排）
============================================================ */
.ac_product-card,
.ac_limited-card,
.ac_collection-card,
.ac_article-card {
    contain: layout paint size;
}


/* ============================================================
   END — 文件尾部稳定段
============================================================ */