/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2f3a41; /* 玄青 */
    --secondary-color: #1f262c; /* 苍墨 */
    --accent-color: #b88946; /* 褐金 */
    --surface-color: #f9f5ed; /* 米白 */
    --bg-light: #f2ede3; /* 素月 */
    --white: #ffffff;
    --text-color: #2b2b28;
    --text-light: #5c5a56;
    --muted-color: #9a8f7b;
    --border-color: #d8d2c4;
    --success-color: #2f6f53;
    --error-color: #b5483f;
    --shadow: 0 15px 35px rgba(34, 40, 49, 0.08);
    --shadow-hover: 0 25px 45px rgba(34, 40, 49, 0.12);
}

body {
    font-family: 'Microsoft YaHei', 'SimHei', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
#main-nav {
    background-color: #0f0f10;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 0 0; /* 右侧保留间距，左侧贴齐 */
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 76px; /* 常规导航高度，LOGO按高度自适应 */
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.nav-logo-image {
    height: 60px; /* 桌面端LOGO目标高度 */
    width: auto; /* 宽度按比例适配横向LOGO */
    border-radius: 0; /* 直角长方形 */
    background-color: #ffffff; /* 黑色导航下的白底 */
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.22);
    padding: 4px; /* 等距留白，四边一致 */
}

.nav-logo-image img {
    max-height: 100%;
    width: auto;
    object-fit: contain; /* 保持LOGO比例不裁切 */
    display: block;
}

.nav-logo-placeholder {
    display: none;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.85);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.05));
}

.nav-logo-text {
    font-size: 20px;
    color: #ffffff;
    font-weight: 600;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.72);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
    padding: 5px 0;
    letter-spacing: 0.5px;
}

.nav-link:hover,
.nav-link.active {
    color: #ffffff;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #ffffff;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: #ffffff;
    transition: all 0.3s;
}

/* 轮播图样式 */
.hero-section {
    margin-top: 0;
}

.carousel-container {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.carousel-wrapper {
    position: relative;
    width: 100%;
    height: 720px; /* 适配 2350x720 横幅比例 */
    overflow: hidden;
    background-color: #000; /* 固定容器背景，避免两侧留白突兀 */
}

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

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
    z-index: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* 在固定尺寸内完整显示图片，自动适配大小 */
    background-color: #000; /* 图片下的填充色与容器一致 */
    display: block;
}

.carousel-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: var(--white);
    padding: 40px;
    z-index: 2;
}

.carousel-content h2 {
    font-size: 36px;
    margin-bottom: 10px;
}

.carousel-content p {
    font-size: 18px;
    opacity: 0.9;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.8);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 30px;
    cursor: pointer;
    z-index: 3;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.carousel-prev {
    left: 20px;
}

.carousel-next {
    right: 20px;
}

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.carousel-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s;
}

.carousel-indicator.active {
    background-color: var(--white);
    width: 30px;
    border-radius: 6px;
}

/* 内容区域样式 */
.intro-section,
.products-section,
.contact-section {
    padding: 80px 0;
}

.intro-section {
    background-color: var(--surface-color);
    text-align: center;
    padding: 90px 0;
}

.intro-section h2,
.products-section h2,
.contact-section h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
}

.intro-section p {
    font-size: 18px;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 30px;
    line-height: 1.8;
}

.intro-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.products-section {
    background-color: var(--bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.product-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

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

.product-image {
    width: 100%;
    height: 300px; /* 统一固定容器高度 */
    background-color: var(--bg-light);
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center; /* 居中显示不同比例图片 */
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* 等比自适应，完整显示 */
    transition: transform 0.4s ease;
    display: block;
    background-color: var(--bg-light); /* 防止空白显突兀 */
}

.product-image-vertical {
    height: 300px; /* 与统一尺寸一致，方便整体整齐 */
}

.product-image-vertical img {
    object-fit: contain; /* 与统一规则一致 */
}

.product-card h3 {
    padding: 20px 20px 10px;
    color: var(--primary-color);
    font-size: 22px;
}

.product-card p {
    padding: 0 20px 20px;
    color: var(--text-light);
}

/* 按钮样式 */
.btn-primary,
.btn-secondary,
.btn-submit,
.btn-reset {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    box-shadow: 0 8px 20px rgba(47, 58, 65, 0.15);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

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

/* 留言表单样式 */
.contact-section {
    background-color: var(--white);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 500;
}

.required {
    color: var(--error-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    background-color: var(--primary-color);
    color: var(--white);
    margin-right: 10px;
}

.btn-submit:hover {
    background-color: var(--secondary-color);
}

.btn-reset {
    background-color: var(--bg-light);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-reset:hover {
    background-color: var(--border-color);
}

.form-message {
    margin-top: 20px;
    padding: 12px;
    border-radius: 5px;
    display: none;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.form-message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, rgba(31, 38, 44, 0.95), rgba(47, 58, 65, 0.95));
    color: var(--white);
    padding: 45px 0;
    text-align: center;
}

.footer p {
    margin: 10px 0;
    opacity: 0.9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 76px;
        left: -100%;
        width: 100%;
        background-color: rgba(7, 7, 8, 0.95);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
        transition: left 0.3s;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        border-bottom: 1px solid var(--border-color);
    }

    .nav-link {
        display: block;
        padding: 15px 0;
    }

    .carousel-wrapper {
        height: 300px;
    }

    .carousel-content {
        padding: 20px;
    }

    .carousel-content h2 {
        font-size: 24px;
    }

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

    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 24px;
    }

    .intro-section h2,
    .products-section h2,
    .contact-section h2 {
        font-size: 28px;
    }

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

    .contact-form {
        padding: 20px;
    }

    .intro-section,
    .products-section,
    .contact-section {
        padding: 50px 0;
    }
}

@media (max-width: 480px) {
    .nav-logo-text {
        font-size: 15px;
    }

    .nav-logo-image {
        height: 48px; /* 平板 */
        width: auto;
        padding: 3px; /* 等距留白 */
        border-radius: 0;
    }

    .carousel-wrapper {
        height: 250px;
    }

    .carousel-content h2 {
        font-size: 20px;
    }
}

@media (max-width: 1200px) {
    .nav-logo-image {
        height: 56px;
        width: auto;
        padding: 3px;
    }
}

/* 页面标题区域 */
.page-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

/* 内容区域 */
.content-section {
    padding: 60px 0;
    background-color: var(--surface-color);
}

.content-block {
    margin-bottom: 60px;
}

.content-block h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
}

.content-block p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 20px;
    text-align: justify;
}

/* 价值观网格 */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.value-item {
    background-color: var(--surface-color);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.value-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.value-item h3 {
    color: var(--primary-color);
    font-size: 22px;
    margin-bottom: 15px;
}

.value-item p {
    color: var(--text-light);
    font-size: 15px;
}

/* 时间轴样式 */
.timeline {
    position: relative;
    padding: 40px 0;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--secondary-color), var(--accent-color));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.timeline-content {
    flex: 1;
    background-color: var(--surface-color);
    padding: 25px;
    border-radius: 8px;
    margin: 0 30px;
    box-shadow: var(--shadow);
}

.timeline-content h3 {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--text-light);
    font-size: 15px;
    margin: 0;
}

/* 产品筛选标签 */
.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 25px;
    border: 1px solid var(--accent-color);
    background-color: var(--surface-color);
    color: var(--accent-color);
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
    font-weight: 500;
}

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

.filter-btn.active {
    background-color: var(--accent-color);
    color: var(--white);
}

/* 产品标签 */
.product-tags {
    padding: 0 20px 20px;
    display: flex;
    gap: 10px;
}

.tag {
    display: inline-block;
    padding: 5px 12px;
    background-color: var(--accent-color);
    color: var(--white);
    border-radius: 15px;
    font-size: 12px;
    letter-spacing: 0.5px;
}

/* 联系信息网格 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.contact-info {
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.contact-info h2 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.info-item {
    margin-bottom: 30px;
}

.info-item h3 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.info-item p {
    color: var(--text-light);
    margin: 5px 0;
    font-size: 15px;
}

.contact-form-wrapper {
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.contact-form-wrapper h2 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 30px;
}

/* 响应式设计 - 新页面元素 */
@media (max-width: 768px) {
    .page-header {
        padding: 50px 0;
    }

    .page-header h1 {
        font-size: 32px;
    }

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

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

    .timeline-item {
        flex-direction: row !important;
        padding-left: 70px;
    }

    .timeline-year {
        width: 60px;
        height: 60px;
        font-size: 16px;
        position: absolute;
        left: 0;
    }

    .timeline-content {
        margin: 0;
    }

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

    .filter-tabs {
        gap: 10px;
    }

    .filter-btn {
        padding: 8px 20px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 24px;
    }

    .content-block h2 {
        font-size: 24px;
    }

    .timeline-year {
        width: 50px;
        height: 50px;
        font-size: 14px;
    }
}

/* 现代化生产体系 */
.production-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f4efe5 0%, #e2d6c6 100%);
}

.production-section h2 {
    font-size: 36px;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 50px;
}

.production-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.production-item {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.production-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.production-icon {
    font-size: 60px;
    margin-bottom: 20px;
    display: block;
}

.production-item h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.production-item p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.6;
}

/* 品质把控 */
.quality-section {
    padding: 80px 0;
    background-color: var(--surface-color);
}

.quality-section h2 {
    font-size: 36px;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 50px;
}

.quality-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 50px;
    align-items: center;
}

.quality-text h3 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.quality-text p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 25px;
}

.quality-list {
    list-style: none;
    padding: 0;
}

.quality-list li {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
    line-height: 1.6;
}

.quality-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 12px;
    height: 12px;
    background-color: var(--primary-color);
    border-radius: 50%;
}

.quality-features {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.quality-feature-item {
    background: #000000;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    color: var(--white);
    box-shadow: var(--shadow);
}

.feature-number {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 10px;
}

.feature-label {
    font-size: 18px;
    opacity: 0.9;
}

/* 发展历程（紧凑版） */
.history-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.history-section h2 {
    font-size: 36px;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 50px;
}

.timeline-compact {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    padding: 40px 0;
}

.timeline-compact::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    transform: translateX(-50%);
}

.timeline-item-compact {
    position: relative;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 30px;
}

.timeline-item-compact:nth-child(odd) {
    flex-direction: row;
}

.timeline-item-compact:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year-compact {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(44, 90, 160, 0.3);
}

.timeline-content-compact {
    flex: 1;
    background-color: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    max-width: 400px;
}

.timeline-content-compact h3 {
    color: var(--primary-color);
    font-size: 22px;
    margin-bottom: 12px;
}

.timeline-content-compact p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
    margin: 0;
}

/* 响应式设计 - 新板块 */
@media (max-width: 768px) {
    .production-section,
    .quality-section,
    .history-section {
        padding: 50px 0;
    }

    .production-section h2,
    .quality-section h2,
    .history-section h2 {
        font-size: 28px;
        margin-bottom: 30px;
    }

    .production-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .production-item {
        padding: 30px 20px;
    }

    .production-icon {
        font-size: 50px;
    }

    .quality-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .quality-features {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .quality-feature-item {
        flex: 1;
        min-width: 150px;
        padding: 30px 20px;
    }

    .feature-number {
        font-size: 36px;
    }

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

    .timeline-item-compact {
        flex-direction: row !important;
        padding-left: 80px;
    }

    .timeline-year-compact {
        width: 60px;
        height: 60px;
        font-size: 18px;
        position: absolute;
        left: 0;
    }

    .timeline-content-compact {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .production-section h2,
    .quality-section h2,
    .history-section h2 {
        font-size: 24px;
    }

    .quality-text h3 {
        font-size: 22px;
    }

    .quality-features {
        flex-direction: column;
    }

    .quality-feature-item {
        width: 100%;
    }

    .timeline-year-compact {
        width: 50px;
        height: 50px;
        font-size: 16px;
    }

    .timeline-content-compact {
        padding: 20px;
    }
}

/* 业务领域页面样式 */
.business-section {
    padding: 80px 0;
    background-color: var(--white);
}

.business-section-alt {
    background-color: var(--bg-light);
}

.business-block {
    max-width: 1000px;
    margin: 0 auto;
}

.business-header {
    text-align: center;
    margin-bottom: 50px;
}

.business-header h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.business-intro {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.business-visual {
    margin-bottom: 40px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.business-visual img {
    width: 100%;
    height: 100%;
    max-height: 420px;
    object-fit: cover;
    display: block;
}

.business-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.business-item h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.application-list,
.advantage-list {
    list-style: none;
    padding: 0;
}

.application-list li,
.advantage-list li {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
}

.application-list li::before,
.advantage-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 24px;
    line-height: 1.2;
}

.application-list li strong,
.advantage-list li strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* 响应式设计 - 业务领域页面 */
@media (max-width: 768px) {
    .business-section {
        padding: 50px 0;
    }

    .business-header h2 {
        font-size: 28px;
    }

    .business-intro {
        font-size: 16px;
    }

    .business-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .business-item h3 {
        font-size: 20px;
    }

    .business-visual {
        margin-bottom: 30px;
    }
}

@media (max-width: 480px) {
    .business-header h2 {
        font-size: 24px;
    }

    .business-item h3 {
        font-size: 18px;
    }

    .application-list li,
    .advantage-list li {
        font-size: 15px;
    }
}

/* 织造能力页面 */
.capability-header {
    background: linear-gradient(135deg, rgba(15, 15, 16, 0.92), rgba(47, 58, 65, 0.92));
}

.capability-section {
    padding: 80px 0;
    background-color: var(--surface-color);
}

.capability-section-alt {
    background-color: var(--bg-light);
}

.capability-section h2 {
    font-size: 34px;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 45px;
    letter-spacing: 0.5px;
}

.capability-intro {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
}

.capability-intro ul {
    list-style: none;
    margin-top: 25px;
    padding: 0;
}

.capability-intro li {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 12px;
    padding-left: 28px;
    position: relative;
    line-height: 1.7;
}

.capability-intro li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-color);
}

.intro-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.intro-text p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 16px;
}

.intro-visual img {
    width: 100%;
    border-radius: 16px;
    box-shadow: var(--shadow-hover);
    object-fit: cover;
}

.capability-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.gallery-item {
    background-color: var(--white);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.gallery-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.gallery-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.gallery-content {
    padding: 24px;
}

.gallery-content h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.gallery-content p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.equipment-card {
    background-color: var(--white);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
    text-align: left;
}

.equipment-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.equipment-image {
    height: 210px;
    overflow: hidden;
}

.equipment-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.equipment-card h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin: 22px 24px 10px;
}

.equipment-card p {
    color: var(--text-light);
    font-size: 15px;
    margin: 0 24px 24px;
    line-height: 1.7;
}

.capability-process {
    background-color: var(--bg-light);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
    position: relative;
}

.process-step {
    background-color: var(--white);
    border-radius: 14px;
    padding: 28px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.process-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.step-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--white);
    font-weight: 600;
    margin-bottom: 18px;
    box-shadow: 0 10px 20px rgba(47, 58, 65, 0.25);
}

.process-step h3 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.process-step p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 15px;
}

.capability-cta {
    background: linear-gradient(135deg, rgba(15, 15, 16, 0.92), rgba(47, 58, 65, 0.95));
    padding: 90px 0;
}

.capability-cta .cta-card {
    background-color: rgba(255, 255, 255, 0.06);
    border-radius: 18px;
    padding: 50px;
    text-align: center;
    color: #ffffff;
    box-shadow: var(--shadow);
}

.capability-cta h2 {
    font-size: 34px;
    margin-bottom: 20px;
    color: #ffffff;
}

.capability-cta p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 30px;
    color: rgba(255, 255, 255, 0.85);
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
}

.capability-cta .btn-primary {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
}

.capability-cta .btn-secondary {
    border-color: #ffffff;
    color: #ffffff;
}

.capability-cta .btn-secondary:hover {
    background-color: #ffffff;
    color: var(--primary-color);
}

@media (max-width: 992px) {
    .capability-intro {
        grid-template-columns: 1fr;
    }

    .intro-visual {
        order: -1;
    }
}

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

    .capability-section h2 {
        font-size: 28px;
    }

    .intro-text h2 {
        font-size: 26px;
    }

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

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

    .process-timeline {
        grid-template-columns: 1fr;
    }

    .capability-cta {
        padding: 70px 0;
    }

    .capability-cta .cta-card {
        padding: 40px 28px;
    }
}

@media (max-width: 480px) {
    .capability-cta h2 {
        font-size: 26px;
    }

    .capability-intro li {
        padding-left: 24px;
    }

    .step-index {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
}