/* ============================================
   金润佳美官网 - TATA风格高端设计
   ============================================ */

/* ========== CSS变量定义 ========== */
:root {
    --primary: #1a1a1a;
    --secondary: #666;
    --accent: #c9a96e;
    --light: #f8f8f8;
    --white: #fff;
    --border: #e8e8e8;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 基础重置 ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--primary);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--white);
}

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

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

ul, ol {
    list-style: none;
}

/* ========== 通用工具类 ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
}

.section-padding {
    padding: 140px 0;
}

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0);
    transition: all 0.3s ease;
    padding: 0;
}

.header.transparent {
    background: transparent;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}

.header.transparent .header-container {
    height: 100px;
}

/* Logo样式 */
.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.logo-text {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--white);
    transition: var(--transition);
}

.header.scrolled .logo-text {
    color: #1a1a1a;
}

.logo-sub {
    font-size: 9px;
    letter-spacing: 3px;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    font-weight: 400;
    transition: var(--transition);
}

.header.scrolled .logo-sub {
    color: #666;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 50px;
}

.nav-item {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    padding: 8px 0;
    transition: var(--transition);
}

.header.scrolled .nav-item {
    color: #1a1a1a;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

/* 头部右侧 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 30px;
}

.header-phone {
    font-size: 15px;
    font-weight: 500;
    color: var(--white);
    letter-spacing: 1px;
    transition: var(--transition);
}

.header.scrolled .header-phone {
    color: #1a1a1a;
}

.menu-btn {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    width: 44px;
    height: 44px;
    padding: 0;
    background: rgba(0, 0, 0, 0.25);
    border: none;
    border-radius: 8px;
    flex-shrink: 0;
    transition: background 0.3s ease;
}

.menu-btn:active {
    background: rgba(0, 0, 0, 0.4);
}

.menu-btn span {
    display: block;
    width: 22px;
    height: 2.5px;
    background: var(--white);
    border-radius: 2px;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.header.scrolled .menu-btn {
    background: rgba(0, 0, 0, 0.08);
}

.header.scrolled .menu-btn span {
    background: #1a1a1a;
}

.header.scrolled .menu-btn:active {
    background: rgba(0, 0, 0, 0.15);
}

/* 移动端菜单 */
.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 26, 0.45);
    z-index: 999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 24px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

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


.mobile-item {
    font-size: 20px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 4px;
    text-decoration: none;
    padding: 12px 50px;
    transition: all 0.3s ease;
}

.mobile-item:hover {
    color: #c9a96e;
}

/* ========== Banner区域 ========== */
.banner {
    position: relative;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
}

.banner-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.2s ease;
}

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

.banner-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.5));
}

.banner-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--white);
    z-index: 2;
    width: 90%;
    max-width: 900px;
}

.banner-content h1 {
    font-size: 72px;
    font-weight: 700;
    letter-spacing: 12px;
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(40px);
    animation: bannerFadeIn 1s ease 0.3s forwards;
}

.banner-content p {
    font-size: 20px;
    letter-spacing: 6px;
    font-weight: 300;
    margin-bottom: 50px;
    opacity: 0;
    transform: translateY(30px);
    animation: bannerFadeIn 1s ease 0.6s forwards;
}

.banner-btn {
    display: inline-block;
    padding: 16px 48px;
    border: 1px solid var(--white);
    color: var(--white);
    font-size: 14px;
    letter-spacing: 3px;
    font-weight: 500;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
    animation: bannerFadeIn 1s ease 0.9s forwards;
}

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

@keyframes bannerFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.banner-scroll-hint {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--white);
    z-index: 2;
}

.banner-scroll-hint span {
    display: block;
    font-size: 11px;
    letter-spacing: 4px;
    margin-bottom: 16px;
    opacity: 0.7;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: var(--white);
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--accent);
    animation: scrollDown 2s ease infinite;
}

@keyframes scrollDown {
    0% {
        top: -100%;
    }
    100% {
        top: 100%;
    }
}

/* ========== Section通用样式 ========== */
.section {
    padding: 140px 0;
}

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

.section-header h2 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: 6px;
    margin-bottom: 16px;
    color: var(--primary);
}

.section-subtitle {
    font-size: 13px;
    letter-spacing: 4px;
    color: var(--secondary);
    text-transform: uppercase;
    font-weight: 400;
}

/* ========== 产品展示 ========== */
.section-products {
    background: var(--light);
}

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

.product-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
}

.product-tab {
    padding: 14px 36px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--secondary);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 0;
}

.product-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.product-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.product-content {
    position: relative;
    min-height: 500px;
}

.product-panel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.6s ease, visibility 0.6s ease;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-panel.active {
    position: relative;
    opacity: 1;
    visibility: visible;
}

.product-image {
    overflow: hidden;
    border-radius: 4px;
}

.product-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.product-info {
    padding: 20px 0;
}

.product-info h3 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 20px;
    color: var(--primary);
}

.product-info p {
    font-size: 16px;
    line-height: 2;
    color: var(--secondary);
    margin-bottom: 32px;
}

.product-link {
    display: inline-block;
    padding: 14px 36px;
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 14px;
    letter-spacing: 2px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.product-link:hover {
    background: var(--primary);
    color: var(--white);
}

.showcase-link {
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
}

.showcase-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.showcase-item:hover .showcase-link img {
    transform: scale(1.08);
}

.showcase-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 40px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: var(--white);
    transform: translateY(20px);
    opacity: 0;
    transition: var(--transition);
}

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

.showcase-overlay h3 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 3px;
    margin-bottom: 8px;
}

.showcase-overlay p {
    font-size: 14px;
    opacity: 0.85;
    letter-spacing: 1px;
}

/* ========== 品牌理念 ========== */
.section-brand {
    background: var(--white);
    overflow: hidden;
}

.brand-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.brand-text h2 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: 4px;
    margin-bottom: 28px;
    color: var(--primary);
}

.brand-text p {
    font-size: 16px;
    line-height: 2;
    color: var(--secondary);
    margin-bottom: 40px;
    letter-spacing: 0.5px;
}

.brand-link {
    display: inline-block;
    padding: 14px 40px;
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 13px;
    letter-spacing: 2px;
    font-weight: 500;
    transition: var(--transition);
}

.brand-link:hover {
    background: var(--primary);
    color: var(--white);
}

.brand-image {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
}

.brand-image img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    transition: transform 0.8s ease;
}

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

/* ========== 关于我们 ========== */
.section-about {
    background: var(--light);
}

.about-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.about-image {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
}

.about-image img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    transition: transform 0.8s ease;
}

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

.about-text h2 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 10px;
    color: var(--primary);
}

.about-en {
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--secondary);
    margin-bottom: 32px;
    text-transform: uppercase;
}

.about-text p {
    font-size: 15px;
    line-height: 2;
    color: var(--secondary);
    margin-bottom: 18px;
}

.about-stats {
    display: flex;
    gap: 60px;
    margin-top: 50px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.stat-item {
    text-align: left;
}

.stat-num {
    display: block;
    font-size: 42px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--secondary);
    letter-spacing: 1px;
}

/* ========== 案例展示 ========== */
.section-cases {
    background: var(--white);
}

.cases-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-item {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    cursor: pointer;
    aspect-ratio: 4/3;
}

.case-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.case-item:hover img {
    transform: scale(1.08);
}

.case-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: var(--white);
    transform: translateY(100%);
    transition: transform 0.5s ease;
}

.case-item:hover .case-info {
    transform: translateY(0);
}

.case-info h3 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 6px;
}

.case-info p {
    font-size: 13px;
    opacity: 0.85;
    letter-spacing: 1px;
}

/* ========== 新闻资讯 ========== */
.section-news {
    background: var(--light);
}

.news-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-item {
    background: var(--white);
    border-radius: 4px;
    overflow: hidden;
    transition: var(--transition);
}

.news-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.news-image {
    height: 220px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.news-item:hover .news-image img {
    transform: scale(1.08);
}

.news-text {
    padding: 30px;
}

.news-date {
    font-size: 12px;
    color: var(--secondary);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 14px;
}

.news-text h3 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.6;
    margin-bottom: 12px;
    color: var(--primary);
    letter-spacing: 0.5px;
}

.news-text p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--secondary);
    margin-bottom: 20px;
}

.news-more {
    font-size: 13px;
    color: var(--accent);
    font-weight: 500;
    letter-spacing: 1px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.news-more::after {
    content: '→';
    transition: transform 0.3s ease;
}

.news-more:hover::after {
    transform: translateX(4px);
}

/* ============================================
   资讯页面样式
   ============================================ */
.section-news-list {
    padding: 100px 0;
    background: #fff;
}

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

.section-news-list .section-header {
    text-align: center;
    margin-bottom: 60px;
}

/* 纵置新闻列表 */
.news-vertical-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 0;
}

.news-row {
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 20px 30px;
    background: var(--light);
    border-radius: 4px;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.news-row:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transform: translateX(4px);
}

.news-row-date {
    flex-shrink: 0;
    width: 100px;
    text-align: center;
    padding-right: 30px;
    border-right: 2px solid var(--border);
}

.news-row-year {
    display: block;
    font-size: 14px;
    color: var(--secondary);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.news-row-month {
    display: block;
    font-size: 32px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 2px;
}

.news-row-day {
    display: block;
    font-size: 32px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.news-row-content {
    flex: 1;
}

.news-row-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
}

.news-row-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.5px;
}

.news-row-desc {
    font-size: 14px;
    line-height: 1.6;
    color: var(--secondary);
}

/* 查看全部按钮 */
.news-more-btn {
    text-align: center;
    padding-top: 50px;
    padding-bottom: 20px;
}

.btn-primary {
    display: inline-block;
    padding: 14px 40px;
    background: var(--primary);
    color: var(--white);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 1px;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* 标签样式 */
.news-tag {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1px;
    border-radius: 2px;
}

.tag-company {
    background: #e3f2fd;
    color: #1976d2;
}

.tag-project {
    background: #e8f5e9;
    color: #388e3c;
}

.tag-product {
    background: #fff3e0;
    color: #f57c00;
}

.tag-award {
    background: #fce4ec;
    color: #c2185b;
}

.tag-video {
    background: #f3e5f5;
    color: #7b1fa2;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .news-row {
        gap: 20px;
        padding: 24px;
    }

    .news-row-date {
        width: 80px;
        padding-right: 20px;
    }

    .news-row-month,
    .news-row-day {
        font-size: 24px;
    }

    .news-row-title {
        font-size: 16px;
    }
}

@media (max-width: 768px) {
    .section-news-list {
        padding: 60px 0;
    }

    .news-container {
        padding: 0 20px;
    }

    .news-row {
        flex-direction: column;
        gap: 12px;
    }

    .news-row-date {
        width: auto;
        border-right: none;
        border-bottom: 2px solid var(--border);
        padding-right: 0;
        padding-bottom: 12px;
        text-align: left;
    }

    .news-row-month,
    .news-row-day {
        font-size: 20px;
    }

    .news-row-title {
        font-size: 16px;
    }

    .btn-primary {
        padding: 12px 30px;
        font-size: 14px;
    }
}

/* ============================================
   新闻详情页样式
   ============================================ */
.news-detail-header {
    padding: 80px 0 60px;
    background: var(--light);
}

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

.news-back-btn {
    display: inline-block;
    font-size: 14px;
    color: var(--secondary);
    text-decoration: none;
    margin-bottom: 20px;
    transition: color 0.3s ease;
}

.news-back-btn:hover {
    color: var(--accent);
}

/* 统一返回按钮 */
.back-link {
    display: inline-block;
    font-size: 14px;
    color: var(--secondary);
    text-decoration: none;
    margin-bottom: 20px;
    transition: color 0.3s ease;
    letter-spacing: 1px;
}

.back-link:hover {
    color: var(--accent);
}

.news-detail-title h1 {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--primary);
    margin-bottom: 16px;
}

.news-detail-meta {
    display: flex;
    align-items: center;
    gap: 16px;
}

.news-detail-date {
    font-size: 14px;
    color: var(--secondary);
}

.news-detail-content {
    padding: 60px 0 100px;
    background: #fff;
}

.news-detail-body {
    max-width: 900px;
    margin: 0 auto;
}

.news-detail-image {
    width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 40px;
}

.news-detail-text {
    font-size: 16px;
    line-height: 2;
    color: #333;
    margin-bottom: 24px;
    text-align: justify;
}

.news-detail-body h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
    margin: 40px 0 20px;
    padding-left: 16px;
    border-left: 4px solid var(--accent);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .news-detail-header {
        padding: 60px 0 40px;
    }

    .news-detail-container {
        padding: 0 20px;
    }

    .news-detail-title h1 {
        font-size: 24px;
    }

    .news-detail-content {
        padding: 40px 0 60px;
    }

    .news-detail-body {
        padding: 0 20px;
    }

    .news-detail-text {
        font-size: 15px;
        line-height: 1.8;
    }

    .news-detail-body h2 {
        font-size: 20px;
    }
}

/* ========== 联系我们 ========== */
.section-contact {
    background: var(--white);
}

.contact-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
}

.contact-container:has(.contact-left:only-child) {
    display: block;
    text-align: center;
}

.contact-container:has(.contact-left:only-child) .contact-details {
    max-width: 600px;
    margin: 0 auto;
}

.contact-container:has(.contact-left:only-child) .contact-cta-btn {
    margin-top: 40px;
}

.contact-left h2 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 10px;
    color: var(--primary);
}

.contact-en {
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--secondary);
    margin-bottom: 40px;
    text-transform: uppercase;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-label {
    font-size: 12px;
    color: var(--secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.contact-value {
    font-size: 18px;
    color: var(--primary);
    font-weight: 500;
}

.contact-value.phone {
    font-size: 28px;
    color: var(--accent);
    font-weight: 700;
}

.contact-right h3 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 40px;
    color: var(--primary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 16px 20px;
    border: 1px solid var(--border);
    background: var(--light);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    border-radius: 0;
}

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

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button {
    padding: 18px 40px;
    background: var(--primary);
    color: var(--white);
    border: none;
    font-size: 14px;
    letter-spacing: 2px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 0;
}

.contact-form button:hover {
    background: var(--accent);
}

/* ========== 二维码区域 ========== */
.qr-codes {
    margin-top: 50px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.contact-cta-btn {
    display: inline-block;
    margin-top: 40px;
    padding: 16px 48px;
    background: var(--primary);
    color: var(--white);
    font-size: 14px;
    letter-spacing: 3px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.contact-cta-btn:hover {
    background: var(--accent);
    color: var(--white);
}

.qr-title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 25px;
    color: var(--primary);
}

.qr-grid {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

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

.qr-image {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 10px;
    transition: var(--transition);
}

.qr-image:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.qr-label {
    display: block;
    font-size: 13px;
    color: var(--secondary);
    letter-spacing: 1px;
}

/* ========== 地图区域 ========== */
.section-map {
    background: var(--light);
    padding: 80px 0;
}

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

.map-title {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 10px;
    color: var(--primary);
}

.map-subtitle {
    font-size: 16px;
    color: var(--secondary);
    margin-bottom: 40px;
    letter-spacing: 2px;
}

#amap-container {
    width: 100%;
    height: 500px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--primary);
    color: var(--white);
    padding: 80px 0 40px;
}

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

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 10px;
}

.footer-brand p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 2px;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-col a,
.footer-col p {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 14px;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--white);
    transform: translateX(4px);
}

.footer-phone {
    font-size: 22px !important;
    font-weight: 700 !important;
    color: var(--accent) !important;
    margin-bottom: 20px !important;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.footer-social a {
    position: relative;
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.08);
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    transition: background 0.3s ease, color 0.3s ease;
    transform: none !important;
    cursor: pointer;
}

.footer-social a:hover {
    background: var(--accent) !important;
    color: var(--white) !important;
    transform: none !important;
}

/* 二维码弹窗 */
.footer-social .qr-tooltip {
    position: absolute;
    bottom: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #fff;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
    width: 184px;
}

.footer-social .qr-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: #fff;
}

.footer-social a:hover .qr-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.footer-social .qr-tooltip img {
    width: 160px;
    height: 160px;
    display: block;
    margin: 0 auto;
}

.footer-social .qr-tooltip .qr-label {
    text-align: center;
    font-size: 12px;
    color: #333;
    margin-top: 8px;
    font-weight: 500;
}

.footer-bottom {
    padding-top: 40px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 1px;
}

/* ========== 回到顶部 ========== */
.back-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-top:hover {
    background: var(--accent);
    transform: translateY(-4px);
}

/* ========== 滚动动画类 ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }

    .header-container {
        padding: 0 30px;
    }

    .nav-menu {
        gap: 30px;
    }

    .product-tabs-container {
        padding: 0 30px;
    }

    .product-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .category-sidebar {
        position: static;
        flex-direction: row;
        gap: 0;
        overflow-x: auto;
    }

    .sidebar-tab {
        padding: 16px 20px;
        white-space: nowrap;
    }

    .tab-number {
        display: none;
    }

    .product-panel {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .product-image img {
        height: 350px;
    }

    .brand-content,
    .about-container,
    .contact-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .cases-container,
    .news-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .section {
        padding: 100px 0;
    }

    .section-header {
        margin-bottom: 60px;
    }
}

@media (max-width: 768px) {
    .header-container {
        height: 70px;
        padding: 0 24px;
    }

    .header.transparent .header-container {
        height: 70px;
    }

    .logo-text {
        font-size: 20px;
        letter-spacing: 2px;
    }

    .logo-sub {
        font-size: 8px;
        letter-spacing: 2px;
    }

    .nav-menu,
    .header-phone {
        display: none;
    }

    .header-actions {
        gap: 10px;
        margin-left: auto;
    }

    .menu-btn {
        display: flex;
    }

    .mobile-item {
        font-size: 20px;
    }

    .banner {
        min-height: 500px;
        height: 80vh;
    }

    .banner-content h1 {
        font-size: 32px;
        letter-spacing: 4px;
        margin-bottom: 16px;
    }

    .banner-content p {
        font-size: 14px;
        letter-spacing: 3px;
        margin-bottom: 36px;
    }

    .banner-btn {
        padding: 12px 32px;
        font-size: 13px;
        letter-spacing: 2px;
    }

    .banner-scroll-hint {
        bottom: 30px;
    }

    .section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-header h2 {
        font-size: 28px;
        letter-spacing: 3px;
    }

    .section-subtitle {
        font-size: 11px;
        letter-spacing: 2px;
    }

    .container,
    .header-container,
    .product-tabs-container,
    .brand-content,
    .about-container,
    .contact-container,
    .cases-container,
    .news-container,
    .footer-container,
    .product-categories,
    .cases-list-container,
    .case-detail-container,
    .about-intro-container,
    .timeline-container,
    .advantages-container,
    .culture-container,
    .brand-showcase-container,
    .mascot-container,
    .map-container,
    .news-detail-container,
    .news-news-container {
        padding: 0 20px;
    }

    .product-tabs {
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 40px;
    }

    .product-tab {
        padding: 8px 16px;
        font-size: 12px;
        letter-spacing: 1px;
    }

    .product-panel {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .product-image img {
        height: 240px;
    }

    .product-info h3 {
        font-size: 24px;
        letter-spacing: 2px;
    }

    .product-info p {
        font-size: 14px;
    }

    .brand-text h2,
    .about-text h2,
    .contact-left h2,
    .about-intro-text h2 {
        font-size: 28px;
        letter-spacing: 2px;
    }

    .brand-text p {
        font-size: 14px;
    }

    .brand-image img,
    .about-image img {
        height: 300px;
    }

    .brand-content,
    .about-container,
    .contact-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat-num {
        font-size: 32px;
    }

    .cases-container,
    .news-container {
        grid-template-columns: 1fr;
    }

    .case-item {
        aspect-ratio: 16/9;
    }

    .case-info {
        transform: translateY(0);
        padding: 20px;
    }

    .case-info h3 {
        font-size: 16px;
    }

    .news-image {
        height: 180px;
    }

    .news-text {
        padding: 20px;
    }

    .news-text h3 {
        font-size: 16px;
    }

    .contact-left {
        width: 100%;
    }

    .contact-value.phone {
        font-size: 22px;
    }

    .contact-right h3 {
        font-size: 22px;
        margin-bottom: 24px;
    }

    .contact-form input,
    .contact-form select,
    .contact-form textarea {
        padding: 14px 16px;
        font-size: 13px;
    }

    .contact-form button {
        padding: 14px 32px;
        font-size: 13px;
    }

    .qr-grid {
        justify-content: center;
        gap: 20px;
    }

    .qr-image {
        width: 90px;
        height: 90px;
    }

    .qr-title {
        font-size: 18px;
    }

    .section-map {
        padding: 50px 0;
    }

    .map-title {
        font-size: 26px;
        letter-spacing: 2px;
    }

    .map-subtitle {
        font-size: 14px;
        margin-bottom: 24px;
    }

    #amap-container {
        height: 300px;
    }

    .footer {
        padding: 50px 0 30px;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 30px;
        padding-bottom: 40px;
    }

    .footer-brand h3 {
        font-size: 22px;
    }

    .footer-nav {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-col h4 {
        font-size: 13px;
        margin-bottom: 16px;
    }

    .footer-social {
        flex-wrap: wrap;
        gap: 0;
    }

    .footer-social a {
        padding: 6px 10px;
        font-size: 12px;
        position: relative;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-social .qr-tooltip::after {
        display: none;
    }

    .footer-social .qr-label {
        font-size: 11px;
        margin-top: 4px;
    }

    .footer-social .qr-tooltip {
        display: block;
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        width: auto;
        padding: 8px 0;
        background: transparent;
    }

    .footer-social .qr-tooltip img {
        width: 80px;
        height: 80px;
    }

    .footer-social a {
        position: relative;
    }

    .footer-phone {
        font-size: 18px !important;
    }

    .footer-bottom p {
        font-size: 11px;
    }

    .back-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }

    /* 产品列表页 */
    .section-products-main {
        padding: 50px 0;
    }

    .product-layout {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .category-sidebar {
        position: static;
        flex-direction: row;
        gap: 0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .sidebar-tab {
        padding: 14px 16px;
        font-size: 14px;
        white-space: nowrap;
        border-left: none;
        border-bottom: 3px solid transparent;
    }

    .sidebar-tab.active {
        border-left-color: transparent;
        border-bottom-color: var(--accent);
    }

    .tab-number {
        display: none;
    }

    .sub-category-tabs {
        gap: 8px;
        margin-bottom: 30px;
    }

    .sub-tab {
        padding: 8px 16px;
        font-size: 12px;
    }

    .product-showcase-large {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .showcase-main img {
        height: 280px;
    }

    .showcase-details h3 {
        font-size: 22px;
        letter-spacing: 2px;
    }

    .showcase-details {
        padding: 0;
    }

    .product-desc {
        font-size: 14px;
    }

    .feature-list li {
        font-size: 14px;
    }

    .product-cta {
        padding: 12px 28px;
        font-size: 13px;
    }

    /* 产品过滤页 */
    .section-products-main .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .product-filter {
        gap: 8px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 8px;
    }

    .filter-btn {
        padding: 8px 16px;
        font-size: 12px;
        white-space: nowrap;
    }

    .product-card-image {
        height: 160px;
    }

    .product-card-title {
        font-size: 14px;
    }

    .product-card-description {
        font-size: 12px;
        -webkit-line-clamp: 2;
    }

    /* 产品详情页 */
    .detail-header {
        padding: 100px 0 50px;
    }

    .detail-title {
        font-size: 28px;
    }

    .detail-price {
        font-size: 22px;
    }

    .detail-description {
        font-size: 15px;
    }

    .detail-section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 22px;
        margin-bottom: 24px;
    }

    .product-gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .gallery-item img {
        height: 160px;
    }

    .advantages-list li {
        padding: 12px 0;
        font-size: 14px;
    }

    .contact-cta {
        padding: 40px 0;
    }

    .contact-cta h2 {
        font-size: 24px;
    }

    .contact-cta p {
        font-size: 14px;
        margin-bottom: 24px;
    }

    .contact-cta .btn {
        padding: 12px 32px;
        font-size: 14px;
    }

    /* 关于我们 */
    .about-intro-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .about-intro-image img {
        height: 280px;
    }

    .section-timeline,
    .section-advantages,
    .section-culture,
    .section-brand-showcase {
        padding: 60px 0;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .advantage-item {
        padding: 24px 20px;
    }

    .advantage-number {
        font-size: 28px;
    }

    .advantage-item h3 {
        font-size: 16px;
    }

    .culture-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .culture-card {
        padding: 24px 20px;
    }

    .culture-card h3 {
        font-size: 16px;
    }

    .timeline::before {
        left: 24px;
    }

    .timeline-year {
        left: 24px;
        width: 48px;
        height: 48px;
        font-size: 14px;
    }

    .timeline-content {
        width: calc(100% - 64px);
        margin-left: 64px !important;
        margin-right: 0 !important;
        padding: 20px;
    }

    .timeline-content h3 {
        font-size: 18px;
    }

    .timeline-content p {
        font-size: 14px;
    }


    /* 案例页面 */
    .section-cases-list {
        padding: 50px 0;
    }

    .cases-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .case-image {
        height: 200px;
    }

    .case-info h3 {
        font-size: 14px;
    }

    .case-info p {
        font-size: 12px;
    }

    .case-detail-header {
        padding: 100px 0 40px;
    }

    .case-detail-title h1 {
        font-size: 28px;
        letter-spacing: 2px;
    }

    .gallery-main img {
        height: 250px;
    }

    .gallery-thumbs {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .gallery-thumb {
        height: 70px;
    }

    .case-back-btn {
        padding: 10px 20px;
        font-size: 13px;
    }

    /* 新闻页面 */
    .section-news-list {
        padding: 50px 0;
    }

    .news-row {
        flex-direction: column;
        gap: 12px;
        padding: 16px 20px;
    }

    .news-row-date {
        width: auto;
        border-right: none;
        border-bottom: 2px solid var(--border);
        padding-right: 0;
        padding-bottom: 10px;
        text-align: left;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .news-row-year {
        font-size: 12px;
        margin-bottom: 0;
    }

    .news-row-month,
    .news-row-day {
        font-size: 20px;
        display: inline;
    }

    .news-row-title {
        font-size: 15px;
    }

    .news-row-desc {
        font-size: 13px;
    }

    .btn-primary {
        padding: 12px 24px;
        font-size: 13px;
    }

    /* 新闻详情 */
    .news-detail-header {
        padding: 100px 0 40px;
    }

    .news-detail-title h1 {
        font-size: 22px;
    }

    .news-detail-content {
        padding: 30px 0 50px;
    }

    .news-detail-body {
        padding: 0;
    }

    .news-detail-text {
        font-size: 14px;
        line-height: 1.8;
    }

    .news-detail-body h2 {
        font-size: 18px;
    }

    .detail-container {
        padding: 0 20px;
    }

    /* 联系我们页面 */
    .contact-cta-btn {
        padding: 14px 36px;
        font-size: 13px;
        margin-top: 30px;
    }
}

/* 小屏幕手机 480px */
@media (max-width: 480px) {
    .banner-content h1 {
        font-size: 26px;
        letter-spacing: 3px;
    }

    .banner {
        min-height: 400px;
        height: 70vh;
    }

    .section {
        padding: 40px 0;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .section-header {
        margin-bottom: 30px;
    }

    .product-tab {
        padding: 6px 12px;
        font-size: 11px;
    }

    .product-image img {
        height: 200px;
    }

    .product-info h3 {
        font-size: 20px;
    }

    .brand-text h2,
    .about-text h2,
    .contact-left h2,
    .about-intro-text h2 {
        font-size: 24px;
    }

    .brand-image img,
    .about-image img {
        height: 240px;
    }

    .about-intro-image img {
        height: 240px;
    }

    .stat-num {
        font-size: 28px;
    }

    .contact-value.phone {
        font-size: 18px;
    }

    .qr-image {
        width: 80px;
        height: 80px;
    }

    .map-title {
        font-size: 22px;
    }

    #amap-container {
        height: 250px;
    }

    .detail-title {
        font-size: 22px;
    }

    .detail-price {
        font-size: 18px;
    }

    .product-gallery {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .gallery-item img {
        height: 140px;
    }

    .cases-grid {
        grid-template-columns: 1fr;
    }

    .section-products-main .products-grid {
        grid-template-columns: 1fr;
    }

    .product-card-image {
        height: 200px;
    }

    .back-btn {
        font-size: 13px;
        margin-bottom: 20px;
    }

    .contact-form button {
        padding: 14px 24px;
        font-size: 13px;
    }

    .footer-phone {
        font-size: 16px !important;
    }

    .showcase-main img {
        height: 220px;
    }

    .showcase-badge {
        padding: 6px 14px;
        font-size: 11px;
        top: 12px;
        left: 12px;
    }

    .mobile-item {
        font-size: 18px;
    }
}

/* 超小屏幕 360px */
@media (max-width: 360px) {
    .banner-content h1 {
        font-size: 22px;
        letter-spacing: 2px;
    }

    .banner-content p {
        font-size: 12px;
        letter-spacing: 2px;
    }

    .banner-btn {
        padding: 10px 24px;
        font-size: 12px;
    }

    .logo-text {
        font-size: 18px;
    }

    .product-image img {
        height: 180px;
    }

    .product-gallery {
        grid-template-columns: 1fr;
    }

    .gallery-item img {
        height: 200px;
    }

    .qr-image {
        width: 70px;
        height: 70px;
    }

    .qr-grid {
        gap: 12px;
    }

    #amap-container {
        height: 220px;
    }
}

/* ============================================
   产品页样式
   ============================================ */
.section-products-main {
    padding: 80px 0;
    background: #fff;
}

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

.product-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 60px;
    align-items: start;
}

/* 左侧大类导航 */
.category-sidebar {
    position: sticky;
    top: 120px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-tab {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 20px;
    background: transparent;
    border: none;
    border-left: 3px solid transparent;
    color: var(--secondary);
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

.sidebar-tab:hover {
    color: var(--primary);
    background: var(--light);
}

.sidebar-tab.active {
    color: var(--primary);
    border-left-color: var(--accent);
    background: var(--light);
}

.tab-number {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    opacity: 0.6;
    min-width: 24px;
}

.sidebar-tab.active .tab-number {
    opacity: 1;
}

.tab-name {
    flex: 1;
}

/* 右侧内容区 */
.category-main {
    min-height: 600px;
}

.category-content {
    display: none;
}

.category-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sub-category-tabs {
    display: flex;
    justify-content: flex-start;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
    padding-left: 4px;
}

.sub-tab {
    padding: 10px 24px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--secondary);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 0;
}

.sub-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.sub-tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}

.sub-category-content {
    position: relative;
}

.sub-panel {
    display: none;
}

.sub-panel.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

.product-showcase-large {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.showcase-main {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
}

.showcase-main img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.showcase-main:hover img {
    transform: scale(1.05);
}

.showcase-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: linear-gradient(135deg, #c9a96e, #d4b87a);
    color: #fff;
    padding: 10px 24px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    border-radius: 4px;
    box-shadow: 0 4px 15px rgba(201, 169, 110, 0.4);
}

.showcase-details {
    padding: 20px 0;
}

.showcase-details h3 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 16px;
    color: var(--primary);
}

.product-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--secondary);
    margin-bottom: 30px;
}

.feature-list {
    list-style: none;
    margin-bottom: 40px;
}

.feature-list li {
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 16px;
    padding-left: 30px;
    position: relative;
    line-height: 1.6;
}

.feature-icon {
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
    font-size: 16px;
}

.product-cta {
    display: inline-block;
    padding: 16px 40px;
    background: var(--primary);
    color: var(--white);
    font-size: 14px;
    letter-spacing: 2px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 0;
}

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

/* ============================================
   关于我们页面样式
   ============================================ */
.section-about-intro {
    padding: 140px 0;
    background: #fff;
}

.about-intro-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.about-intro-text h2 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: 4px;
    margin-bottom: 16px;
    color: var(--primary);
}

.about-en {
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--secondary);
    margin-bottom: 32px;
    text-transform: uppercase;
}

.about-intro-text p {
    font-size: 16px;
    line-height: 2;
    color: var(--secondary);
    margin-bottom: 18px;
}

.about-intro-image {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
}

.about-intro-image img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.about-intro-image:hover img {
    transform: scale(1.05);
}

/* 发展历程 */
.section-timeline {
    padding: 140px 0;
    background: var(--light);
}

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

.timeline {
    position: relative;
    padding: 40px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--border);
}

.timeline-item {
    position: relative;
    display: flex;
    justify-content: center;
    margin-bottom: 60px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-year {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 100px;
    background: var(--white);
    border: 2px solid var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    z-index: 2;
}

.timeline-content {
    width: 45%;
    padding: 30px;
    background: var(--white);
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
    margin-left: 0;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
    margin-right: 0;
}

.timeline-content h3 {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 12px;
    color: var(--primary);
}

.timeline-content p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--secondary);
}

/* 八大优势 */
.section-advantages {
    padding: 140px 0;
    background: var(--light);
}

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

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

.advantage-item {
    padding: 40px 30px;
    background: var(--white);
    border-radius: 4px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.advantage-item:hover::before {
    transform: scaleX(1);
}

.advantage-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.advantage-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.3;
    margin-bottom: 16px;
    line-height: 1;
}

.advantage-item h3 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 16px;
    color: var(--primary);
}

.advantage-item p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--secondary);
}

/* ============================================
   案例展示页面样式
   ============================================ */
.section-cases-list {
    padding: 100px 0 120px;
    background: #fff;
}

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

.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 80px;
}

.case-card {
    position: relative;
    overflow: visible;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.case-image {
    height: 280px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.case-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85), transparent);
    color: #ffffff;
    z-index: 2;
}

.case-info h3 {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 6px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #ffffff;
}

.case-info p {
    font-size: 13px;
    opacity: 0.9;
    letter-spacing: 0.5px;
    color: #e0e0e0;
}

/* 案例详情页样式 */
.case-detail-header {
    padding: 120px 0 60px;
    background: var(--light);
}

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

.case-detail-title {
    margin-bottom: 40px;
}

.case-detail-title h1 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--primary);
    margin-bottom: 12px;
}

.case-detail-title p {
    font-size: 16px;
    color: var(--secondary);
    letter-spacing: 1px;
}

.case-gallery {
    margin-bottom: 60px;
}

.gallery-main {
    margin-bottom: 20px;
}

.gallery-main img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    border-radius: 4px;
}

.gallery-thumbs {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
}

.gallery-thumb {
    height: 100px;
    overflow: hidden;
    border-radius: 4px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.gallery-thumb.active {
    border-color: var(--accent);
}

.gallery-thumb:hover {
    border-color: var(--accent);
}

.gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-thumb:hover img {
    transform: scale(1.1);
}

.case-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: var(--primary);
    color: var(--white);
    font-size: 14px;
    letter-spacing: 1px;
    border-radius: 0;
    transition: all 0.3s ease;
}

.case-back-btn:hover {
    background: var(--accent);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gallery-thumbs {
        grid-template-columns: repeat(4, 1fr);
    }

    .gallery-main img {
        height: 400px;
    }
}

@media (max-width: 768px) {
    .section-cases-list {
        padding: 60px 0;
    }

    .cases-list-container,
    .case-detail-container {
        padding: 0 20px;
    }

    .cases-grid {
        grid-template-columns: 1fr;
    }

    .gallery-thumbs {
        grid-template-columns: repeat(3, 1fr);
    }

    .gallery-main img {
        height: 250px;
    }

    .case-detail-title h1 {
        font-size: 28px;
    }
}

/* 品牌文化 */
.section-culture {
    padding: 140px 0;
    background: #fff;
}

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

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

.culture-card {
    padding: 40px 30px;
    background: var(--light);
    border-radius: 4px;
    text-align: center;
    transition: all 0.3s ease;
}

.culture-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

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

.culture-card h3 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 16px;
    color: var(--primary);
}

.culture-card p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--secondary);
}

/* 品牌展示 */
.section-brand-showcase {
    padding: 80px 0;
    background: var(--light);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 600px;
}

.brand-showcase-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    width: 100%;
}

.brand-showcase-image {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.brand-showcase-image img {
    width: 100%;
    max-width: 900px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.brand-showcase-image img:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 50px rgba(0, 0, 0, 0.15);
}

/* 吉祥物 */
.section-mascot {
    padding: 140px 0;
    background: #fff;
}

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

.mascot-showcase {
    text-align: center;
}

.mascot-showcase img {
    width: 100%;
    max-width: 600px;
    height: auto;
    margin: 0 auto 24px;
    border-radius: 8px;
}

.mascot-desc {
    font-size: 16px;
    color: var(--secondary);
    letter-spacing: 1px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .about-intro-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .about-intro-image img {
        height: 400px;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .culture-grid {
        grid-template-columns: repeat(2, 1fr);
    }


    .timeline-year {
        width: 80px;
        height: 80px;
        font-size: 20px;
    }

    .timeline-content {
        width: 40%;
    }
}

@media (max-width: 768px) {
    .section-about-intro,
    .section-timeline,
    .section-advantages,
    .section-culture,
    .section-brand-showcase {
        padding: 80px 0;
    }

    .about-intro-container,
    .timeline-container,
    .advantages-container,
    .culture-container,
    .brand-showcase-container {
        padding: 0 20px;
    }

    .about-intro-text h2 {
        font-size: 32px;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .culture-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-year {
        left: 30px;
        width: 60px;
        height: 60px;
        font-size: 16px;
    }

    .timeline-content {
        width: calc(100% - 80px);
        margin-left: 80px !important;
        margin-right: 0 !important;
    }

}

/* ============================================
   视频播放器样式
   ============================================ */
.video-player-container {
    margin: 40px 0;
    border-radius: 8px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.video-player-container video {
    width: 100%;
    height: auto;
    display: block;
    max-height: 600px;
    object-fit: contain;
    background: #000;
}

.video-player-container .video-wrapper {
    position: relative;
    width: 100%;
    cursor: pointer;
}

.video-player-container .video-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
    pointer-events: none;
}

.video-player-container .video-wrapper:hover::before {
    opacity: 1;
}

.video-player-container .play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.video-player-container .play-button::after {
    content: '';
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 15px 0 15px 25px;
    border-color: transparent transparent transparent #333;
    margin-left: 5px;
}

.video-player-container .video-wrapper:hover .play-button {
    transform: translate(-50%, -50%) scale(1.1);
    background: rgba(255, 255, 255, 1);
}

.video-player-container .video-wrapper.playing .play-button {
    opacity: 0;
    pointer-events: none;
}

.video-player-container .video-wrapper.playing:hover .play-button {
    opacity: 1;
    pointer-events: auto;
}

.video-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
}

.video-label::before {
    content: '🎬';
}

/* 移动端适配 */
@media (max-width: 768px) {
    .video-player-container {
        margin: 24px 0;
        border-radius: 4px;
    }

    .video-player-container video {
        max-height: 300px;
    }

    .video-player-container .play-button {
        width: 60px;
        height: 60px;
    }

    .video-player-container .play-button::after {
        border-width: 12px 0 12px 20px;
        margin-left: 4px;
    }

    .video-label {
        font-size: 12px;
        padding: 6px 12px;
    }
}

@media (max-width: 480px) {
    .video-player-container video {
        max-height: 250px;
    }

    .video-player-container .play-button {
        width: 50px;
        height: 50px;
    }

    .video-player-container .play-button::after {
        border-width: 10px 0 10px 16px;
        margin-left: 3px;
    }
}