/* 导入字体需放在最顶部 */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=Montserrat:wght@300;400;500;600&display=swap');

/* 合并重复的:root变量定义 */
:root {
    --primary-color: #B8860B; /* 暗金色 - 主色调 */
    --secondary-color: #121212; /* 深黑色 - 辅助色 */
    --accent-color: #D4AF37; /* 亮金色 - 强调色 */
    --text-color: #121212; /* 黑色文本 */
    --text-light: #888888; /* 浅灰色文本 */
    --background-light: #1a1a1a; /* 深色背景 */
    --white: #f5f5f5; /* 米白色 */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --transition-standard: all 0.3s ease;
}

/* 导航链接样式 */
.nav-link {
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 18px;
    transition: background-color 0.3s;
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(0, 0, 0, 0.05);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.nav-link:hover::after {
    transform: translateX(0);
}

.navbar .nav-link::after {
    background-color: var(--accent-color);
}

.timeline-item::after {
    border-color: var(--accent-color);
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 系统字体设置 */
body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-light);
    scroll-behavior: smooth;
    overflow-x: hidden; /* 修复单独的overflow声明，移至body */
}

/* Base typography */
h1, h2, h3, h4 {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.2;
}

p, a, button, input, textarea {
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
}

/* 固定顶部导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: transparent;
    backdrop-filter: blur(15px);
    padding: 22px 80px;
    transition: var(--transition-standard);
    z-index: 1000;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    height: 80px; /* 固定导航栏高度 */
}

.nav-links {
    margin: 0 auto;
    display: flex;
    gap: 20px;
}
.logo-container {
    position: relative;
    margin-right: 30px;
    z-index: 1001;
}

.logo-img {
    height: auto;
    max-height: 100px; /* 增大logo尺寸 */
    vertical-align: middle;
    max-width: 100%;
    transition: all 0.3s ease;
    border-radius: 50%; /* 可选：添加圆角效果 */
}

.navbar.scrolled {
    background-color: rgba(18, 18, 18, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    padding: 16px 80px;
    height: 70px; /* 滚动时保持导航栏高度 */
}

/* 导航栏移动端响应式优化 */
@media (max-width: 768px) {
    .logo-container {
        margin-right: 15px;
    }
    .logo-img {
        max-height: 70px;
    }
    .navbar, .navbar.scrolled {
        padding: 10px 15px;
        height: 60px;
        justify-content: flex-start;
    }
    .nav-links {
        margin: 0 auto;
        gap: 10px;
    }
    .nav-link {
        padding: 6px 8px;
        font-size: 0.9rem;
    }
}

/* 公司介绍移动端响应式优化 */
@media (max-width: 768px) {
    .about-card {
        padding: 15px;
        margin: 0 10px;
        border-radius: 10px;
    }
    .about h2 {
        font-size: 1.8rem;
        margin-bottom: 15px;
        text-align: center;
    }
    .about-content {
        padding: 50px 15px 20px;
        gap: 30px;
        flex-direction: column;
        align-items: center;
    }
    .about-logo-container {
        width: 100px;
        height: 100px;
        top: -25px;
        left: 50%;
        transform: translateX(-50%);
        padding: 3px;
    }
    .about-text {
        margin-top: 30px;
        font-size: 0.85rem;
        text-align: center;
    }
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        margin-top: 20px;
    }
    .stat {
        padding: 10px;
        text-align: center;
    }
}

/* 时间线移动端响应式优化 */
@media (max-width: 768px) {
    .construction {
        padding: 20px 10px;
    }
    .construction h2 {
        font-size: 1.8rem;
        text-align: center;
    }
    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
    .timeline-item {
        padding: 30px 15px;
        width: 100%;
    }
    .timeline-item .timeline-content {
        max-width: 100%;
        width: calc(100% - 30px);
        margin-left: auto !important;
        margin-right: auto !important;
        text-align: center;
    }
    .timeline-item::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .construction-image {
        height: 180px;
    }
}

/* 产品展示移动端响应式优化 */
@media (max-width: 768px) {
    .products {
        padding: 20px 10px;
    }
    .products h2 {
        font-size: 1.8rem;
        text-align: center;
    }
    .product-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .product-card {
        margin: 0 auto;
        max-width: 300px;
    }
    .product-image {
        height: 200px;
    }
    .product-card h3 {
        font-size: 1.2rem;
    }
    .product-card p {
        font-size: 0.85rem;
    }

    /* 作品集移动端响应式优化 */
    .gallery {
        grid-template-columns: 1fr;
    }
    .filter-buttons {
        flex-wrap: wrap;
        gap: 10px;
    }
}

.navbar .logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 0.8px;
    text-transform: uppercase;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.navbar .nav-link {
    position: relative;
    margin: 0 20px;
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, rgba(212,175,55,0) 0%, rgba(212,175,55,1) 50%, rgba(212,175,55,0) 100%);
    transition: width 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    border-radius: 3px;
    box-shadow: 0 0 10px rgba(212,175,55,0.5);
}

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

.navbar .nav-link:hover {
    color: var(--accent-color);
    text-shadow: 0 0 15px rgba(212,175,55,0.5);
    transform: scale(1.05);
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links {
    display: flex;
    gap: 20px;
}

.language-switch {
    display: flex;
    gap: 8px;
}

.lang-btn {
    background-color: transparent;
    border: 1px solid rgba(212, 175, 55, 0.5);
    border-radius: 18px;
    padding: 4px 10px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
    color: var(--white);
}

.lang-btn:hover,
.lang-btn.active {
    background-color: var(--accent-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* 全屏英雄区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0a0a0a 100%);
    color: var(--white);
    text-align: center;
    padding: 0 20px;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid rgba(184, 134, 11, 0.3);
}

/* 移除渐变叠加层以提高标题清晰度 */
.hero::before {
    display: none;
}

.hero-content h1 {
    color: var(--primary-color);
    text-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
    font-weight: 800;
    font-size: 3.5rem;
    letter-spacing: 0.8px;
    animation: fadeIn 1.2s ease-out;
    margin-bottom: 10px;
}

.hero-content p {
    font-size: 1.3rem;
    color: var(--white);
    margin-bottom: 30px;
    max-width: 600px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.cta-button {
    position: relative; /* 为伪元素提供定位基准 */
    padding: 14px 30px;
    border-radius: 30px;
    border: 1px solid var(--primary-color);
    background-color: var(--primary-color);
    color: var(--secondary-color);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin: 0 12px;
    box-shadow: 0 4px 20px rgba(184, 134, 11, 0.4);
    text-decoration: none;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.cta-button.secondary {
    background-color: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.2);
}

.cta-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 80%);
    transform: translate(-50%, -50%) scale(0);
    transition: transform 0.5s;
}

/* 合并cta-button的hover状态，避免冲突 */
.cta-button:hover {
    background-color: transparent; border: 2px solid #d4af37; color: #d4af37;
    box-shadow: 0 6px 20px rgba(0, 113, 227, 0.4);
    transform: translateY(-3px);
}

.cta-button:active {
    transform: translateY(0);
}

/* 产品部分样式 */
.products, .section {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.products h2, .section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 50px;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.product-grid, .gallery {
    display: grid;
    gap: 30px;
}

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

.gallery {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    margin-bottom: 40px;
}

/* 合并产品卡片样式，去重 */
.product-card {
    background-color: rgba(0, 0, 0, 0.8);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    min-height: 300px;
    padding: 20px;
}

.product-card p {
    font-size: 1rem;
    color: #f8f8f8;
    line-height: 1.6;
    margin: 0 0 15px;
    padding: 10px;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
}

.product-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 15px;
}

.product-card h3 {
    font-size: 1.3rem;
    color: var(--white);
    margin: 0 0 15px;
    line-height: 1.4;
    text-align: center;
}


#contact-btn {
    display: block;
    margin: 0 auto;
    background-color: #0071e3;
    color: white;
    border: none;
    border-radius: 25px;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

#contact-btn:hover {

    transform: scale(1.05);
}

/* 施工流程时间线 */
.construction {
    padding: 80px 20px;
    background-color: var(--background-light);
}

.construction h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 50px;
}

.timeline {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    padding: 0 20px;
}

.timeline::before, .timeline::after {
    display: none;
}

.timeline-item {
    padding: 0;
    position: static;
    width: 100%;
    justify-content: center;
}

.timeline-item:not(.even), .timeline-item.even {
    justify-content: center;
}

.timeline-item .timeline-content {
    width: 100%;
    max-width: 100%;
    padding: 25px;
    margin: 0 auto !important;
    background-color: var(--secondary-color);
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(184, 134, 11, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background-image: linear-gradient(to bottom right, rgba(18, 18, 18, 0.9), rgba(30, 30, 30, 0.9));
}






.timeline-content img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    margin-top: 10px;
}

/* 移除时间线黑点 */
.timeline-item::after {
    content: none;
}
.timeline-item:not(.even)::after {
    right: -10px;
}
.timeline-item.even::after {
    left: -10px;
}

.timeline-item.even .timeline-content::after {
    left: -10px;
}

.timeline-item:not(.even) .timeline-content::after {
    right: -10px;
}

.timeline-content h3 {
    color: var(--accent-color);
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--white);
}

.timeline-content:hover {
    transform: scale(1.03);
    box-shadow: 0 10px 25px rgba(0, 168, 255, 0.15);
}

.timeline-img {
    width: 80px;
    height: 80px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 15px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

/* 右侧时间线项 */
.timeline-item.right {
    left: 50%;
}

/* 项目标签 */
.projects {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    margin-top: 40px;
}

.projects span {
    background-color: rgba(30, 30, 30, 0.8);
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 0.9rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    color: var(--white);
}

/* 公司介绍部分 */
.about {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.about-card {
    background-color: var(--secondary-color);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    padding: 40px;
    max-width: 1000px;
    margin: 0 auto;
    border: 1px solid rgba(184, 134, 11, 0.4);
    background-image: linear-gradient(to bottom right, rgba(18, 18, 18, 0.95), rgba(30, 30, 30, 0.95));
    backdrop-filter: blur(10px);
}

.about h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 60px;
    padding: 80px 40px 40px;
    position: relative;
    text-align: center;
}

.about-logo-container {
    position: absolute;
    top: -25px; /* 向下移动使logo容器底部与文字顶部对齐 */
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    justify-content: center;
    width: 160px;
    height: 160px;
    
    border-radius: 50%;
    border: 2px solid var(--secondary-color); /* 取消金边，保持黑色 */
    padding: 5px;
}

.about-logo {
    height: 100%;
    width: 100%;
    object-fit: contain;
}

.about-text {
    margin-top: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}



.about-text p {
    margin-bottom: 20px;
    line-height: 1.8;
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--white);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    text-align: center;
    width: 100%;
}

.stat {
    text-align: center;
    padding: 20px;
    background-color: rgba(30, 30, 30, 0.8);
    border-radius: 15px;
    border: 1px solid rgba(184, 134, 11, 0.3);
}

.stat span {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--accent-color);
    text-shadow: 0 2px 8px rgba(212, 175, 55, 0.3);
    letter-spacing: 1px;
}

.stat p {
    color: var(--white);
    font-size: 0.9rem;
}

/* 联系部分样式 */
.contact {
    padding: 80px 20px;
    background-color: var(--background-light);
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 50px;
}

.contact-container {
    max-width: 1200px;
    margin: 0 auto 80px;
    padding: 60px;
    background-color: rgba(30, 30, 30, 0.9);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.contact-info {
    background-color: rgba(0, 0, 0, 0.85);
    padding: 60px;
    border-radius: 15px;
    border: 1px solid rgba(184, 134, 11, 0.4);
    color: var(--white);
    font-family: 'Segoe UI', 'Microsoft YaHei', 'Heiti SC', sans-serif;
    font-size: 1.2rem;
    line-height: 2.0;
    letter-spacing: 0.5px;
}

.info-item {
    margin-bottom: 35px;
    display: flex;
    align-items: flex-start;
}

.info-item .icon {
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    border-radius: 50%;
    margin-right: 25px;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.contact-form {
    background-color: rgba(18, 18, 18, 0.9);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(184, 134, 11, 0.3);
}

#contact-form {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input,
.contact-form textarea,
#contact-form input,
#contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid rgba(184, 134, 11, 0.5);
    border-radius: 15px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    background-color: rgba(30, 30, 30, 0.8);
    color: var(--white);
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.3);
}

.contact-form textarea,
#contact-form textarea {
    resize: vertical;
}

.contact-form button,
#contact-form button {
    width: 100%;
    margin-top: 10px;
}

.map-placeholder {
    height: 200px;
    background-color: rgba(30, 30, 30, 0.8);
    border-radius: 15px;
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

/* 页脚样式 */
.footer {
    background-color: var(--secondary-color);
    padding: 60px 20px 20px;
    color: var(--white);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
    border-top: 1px solid rgba(184, 134, 11, 0.3);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 60px;
}

.footer-section {
    flex: 1;
    min-width: 200px;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.footer-link {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--white);
    display: block;
    color: var(--white);
}

.footer-section p {
    margin-bottom: 10px;
    opacity: 0.9;
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-icon {
    display: inline-block;
    width: 45px;
    height: 45px;
    line-height: 45px;
    text-align: center;
    border-radius: 50%;
    background-color: rgba(18, 18, 18, 0.8);
    color: var(--white);
    margin-right: 12px;
    transition: var(--transition-standard);
    border: 1px solid rgba(184, 134, 11, 0.3);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
}

.social-icon:hover {
    background-color: var(--accent-color);
    color: var(--secondary-color);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 5px 15px rgba(212, 175, 55, 0.4);
}

.copyright {
    text-align: center;
    padding-top: 40px;
    margin-top: 40px;
    border-top: 1px solid rgba(184, 134, 11, 0.2);
    font-size: 0.9rem;
    color: rgba(212, 175, 55, 0.9);
    letter-spacing: 0.5px;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: rgba(18, 18, 18, 0.85);
    color: var(--accent-color);
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: var(--transition-standard);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
    border: 1px solid rgba(184, 134, 11, 0.4);
}

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

.back-to-top:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.timeline-content {
    width: 45%;
}



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

@media (max-width: 768px) {
    .navbar, .navbar.scrolled {
        padding: 15px 20px;
    }
    .nav-links {
    display: none;
}

    /* 联系部分移动端响应式优化 */
    .contact {
        padding: 20px 10px;
    }
    .contact h2 {
        font-size: 1.8rem;
        text-align: center;
    }
    .contact-container {
        flex-direction: column;
        align-items: center;
    }
    .contact-info {
        width: 100%;
        max-width: 300px;
        margin-bottom: 20px;
    }
    .info-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
        margin-bottom: 15px;
    }
    .contact-form {
        width: 100%;
        max-width: 300px;
    }

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 80%;
    height: 100vh;
    background-color: var(--secondary-color);
    z-index: 1001;
    padding: 30px;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    color: var(--white);
}

.mobile-menu .menu-item {
    padding: 15px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s ease;
    color: var(--white);
}

.mobile-menu a {
    color: var(--white);
    text-decoration: none;
}

.mobile-menu button {
    color: var(--white);
}

.mobile-menu .lang-btn {
    color: var(--white);
    border-color: rgba(212, 175, 55, 0.5);
}

.mobile-menu .mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    color: var(--white);
}
    /* 统一移动端时间线样式 */
    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
    .timeline-item {
        padding: 30px 15px;
        width: 100%;
    }
    .timeline-item .timeline-content {
        max-width: 100%;
        width: calc(100% - 30px);
        margin-left: auto !important;
        margin-right: auto !important;
        text-align: center;
    }
    .timeline-item::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .about-content {
        grid-template-columns: 1fr;
        flex-direction: column;
    }
    .about-stats {
        grid-template-columns: 1fr;
    }
    .contact-container {
        grid-template-columns: 1fr;
        flex-direction: column;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .products h2,
    .construction h2,
    .about h2,
    .contact h2 {
        font-size: 2rem;
    }
    .gallery {
        grid-template-columns: 1fr;
    }
}
.construction-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    margin-top: 15px;
}