/* ========================================
   金林三维科技有限公司（越南） - 企业网站样式
   工业风格设计，蓝色主色调
   ======================================== */

/* CSS变量定义 */
:root {
    --primary-color: #0081cc;
    --primary-dark: #0066a3;
    --primary-light: #40a9ff;
    --secondary-color: #36cfc9;
    --accent-color: #52c41a;
    --text-primary: #1a1a1a;
    --text-secondary: #595959;
    --text-light: #8c8c8c;
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-dark: #001529;
    --border-color: #d9d9d9;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   头部导航
   ======================================== */
.site-header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.company-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    gap: 4px;
}

/* 语言切换器 */
.language-switcher {
    display: flex;
    gap: 4px;
    margin-left: 12px;
    padding-left: 12px;
    border-left: 1px solid var(--border-color);
}

.lang-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid transparent;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    font-family: inherit;
}

.lang-btn:hover {
    background: var(--primary-light);
    color: white;
    transform: translateY(-2px);
}

.lang-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-dark);
    box-shadow: 0 2px 8px rgba(0, 129, 204, 0.3);
}

.nav-item a {
    display: block;
    padding: 10px 12px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-item a:hover,
.nav-item.active a {
    color: var(--primary-color);
    background: rgba(0, 129, 204, 0.08);
}

/* 上传图纸按钮 */
.nav-quote a {
    background: #ffc107 !important;
    color: #333 !important;
    font-weight: 600 !important;
    white-space: nowrap;
    padding: 10px 16px !important;
    font-size: 14px !important;
}

.nav-quote a:hover {
    background: #e6ac00 !important;
    color: #000 !important;
}

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

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ========================================
   Banner区域
   ======================================== */
.hero-banner {
    background: linear-gradient(135deg, #001529 0%, #003a70 50%, #0081cc 100%);
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    position: relative;
    overflow: hidden;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -30%;
    right: -30%;
    bottom: -30%;
    background: url('../images/门口.jpg') center/contain no-repeat;
    opacity: 1;
}

.hero-content {
    text-align: center;
    color: white;
    max-width: 800px;
    position: relative;
    z-index: 1;
    background: rgba(0, 21, 41, 0.6);
    padding: 40px;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(5px);
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: 2px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
    white-space: nowrap;
}

.hero-subtitle {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 20px;
    opacity: 1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}

.hero-desc {
    font-size: 20px;
    opacity: 1;
    margin-bottom: 40px;
    line-height: 1.8;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 129, 204, 0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    transform: translateY(-2px);
}

.hero-image {
    display: none;
}

/* 报价按钮 */
.btn-quote {
    background: #ffc107;
    color: #333;
    border-color: #ffc107;
    font-weight: 600;
}

.btn-quote:hover {
    background: #ffb300;
    border-color: #ffb300;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 193, 7, 0.4);
}

/* ========================================
   报价弹窗
   ======================================== */
.quote-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.quote-modal.active {
    display: flex;
}

.quote-modal-content {
    background: white;
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.quote-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.quote-modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.quote-step {
    display: none;
}

.quote-step.active {
    display: block;
}

.quote-header {
    text-align: center;
    margin-bottom: 30px;
}

.quote-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.quote-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.quote-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 24px;
}

.quote-upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(0, 129, 204, 0.02);
}

.quote-upload-area svg {
    margin-bottom: 16px;
}

.upload-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.upload-hint {
    font-size: 13px;
    color: var(--text-secondary);
}

.quote-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.feature-tag {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.wechat-qr-container {
    text-align: center;
    padding: 30px 0;
}

.wechat-qr-code {
    width: 200px;
    height: 200px;
    margin: 0 auto 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
}

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

.qr-placeholder p {
    margin-top: 10px;
    color: var(--text-secondary);
    font-size: 14px;
}

.wechat-hint {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.quote-success {
    text-align: center;
    padding: 30px 0;
}

.quote-success h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 16px 0 8px;
}

.quote-success p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.quote-info {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 24px;
    text-align: left;
}

.quote-info p {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.quote-info p:last-child {
    margin-bottom: 0;
}

/* ========================================
   通用区块样式
   ======================================== */
section {
    padding: 80px 0;
}

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

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-top: 24px;
}

/* ========================================
   服务概览
   ======================================== */
.services-overview {
    background: var(--bg-secondary);
}

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

.service-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-link {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 14px;
}

.service-link:hover {
    color: var(--primary-dark);
}

/* ========================================
   制造工艺轮播图
   ======================================== */
.process-section {
    background: white;
    padding-bottom: 40px;
}

.process-carousel-container {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.process-carousel-wrapper {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.process-carousel-slide {
    min-width: 100%;
    display: flex;
    background: white;
    overflow: hidden;
    min-height: 400px;
}

.process-slide-image {
    width: 38%;
    min-height: 400px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.process-slide-image::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 255, 255, 0.05) 10px,
        rgba(255, 255, 255, 0.05) 20px
    );
    animation: slidePattern 20s linear infinite;
}

@keyframes slidePattern {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.process-slide-icon {
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
}

.process-slide-icon svg {
    width: 50px;
    height: 50px;
    fill: white;
}

.process-slide-content {
    width: 62%;
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.process-slide-title {
    font-size: 24px;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 20px;
    line-height: 1.4;
}

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

.process-slide-description p {
    margin-bottom: 10px;
    text-indent: 2em;
}

.process-slide-description strong {
    color: var(--primary-color);
}

.process-slide-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.process-feature-tag {
    padding: 6px 14px;
    background: #f0f5ff;
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
}

.process-btn-detail {
    display: inline-block;
    padding: 12px 28px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    width: fit-content;
    cursor: pointer;
}

.process-btn-detail:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 129, 204, 0.3);
}

/* 轮播控制 */
.process-carousel-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    background: #fafafa;
    border-top: 1px solid var(--border-color);
}

.process-carousel-arrow {
    width: 44px;
    height: 44px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.process-carousel-arrow:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.process-carousel-arrow:hover svg {
    fill: white;
}

.process-carousel-arrow svg {
    width: 20px;
    height: 20px;
    fill: var(--text-secondary);
}

.process-carousel-indicators {
    display: flex;
    gap: 8px;
}

.process-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.process-indicator.active {
    background: var(--primary-color);
    width: 30px;
    border-radius: 5px;
}

/* 主题标签导航 */
.process-topic-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 30px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.process-topic-tag {
    padding: 10px 20px;
    background: white;
    color: var(--text-secondary);
    border-radius: 25px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    font-weight: 500;
}

.process-topic-tag:hover,
.process-topic-tag.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 129, 204, 0.3);
}

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

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    aspect-ratio: 4/3;
}

.product-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.product-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
    transform: translateY(100%);
    transition: var(--transition);
}

.product-item:hover .product-overlay {
    transform: translateY(0);
}

.product-overlay span {
    font-size: 16px;
    font-weight: 500;
}

/* ========================================
   设备展示
   ======================================== */
.equipment-section {
    background: white;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.equipment-item {
    text-align: center;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.equipment-item img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.equipment-item h4 {
    padding: 16px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-secondary);
}

/* ========================================
   支持服务
   ======================================== */
.support-section {
    background: var(--bg-secondary);
}

.support-content {
    display: flex;
    gap: 60px;
    align-items: center;
}

.support-cards {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.support-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.support-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.support-card-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.support-card-icon svg {
    width: 28px;
    height: 28px;
    fill: white;
}

.support-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.support-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.support-image {
    flex: 1;
    max-width: 500px;
}

.support-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

@media (max-width: 968px) {
    .support-content {
        flex-direction: column;
    }
    
    .support-image {
        max-width: 100%;
    }
}

/* ========================================
   优势展示
   ======================================== */
.advantages-section {
    background: linear-gradient(135deg, #001529 0%, #003a70 100%);
    color: white;
}

.advantages-section .section-header h2 {
    color: white;
}

.advantages-section .section-header h2::after {
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-light));
}

.advantages-section .section-header p {
    color: rgba(255, 255, 255, 0.8);
}

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

.advantage-item {
    text-align: center;
    padding: 40px 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.advantage-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.advantage-item h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.advantage-item p {
    font-size: 15px;
    opacity: 0.85;
    line-height: 1.7;
}

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

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-item {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.case-item img {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
}

.case-info {
    padding: 24px;
}

.case-info h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.case-info p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   证书展示
   ======================================== */
.certificates-section {
    background: white;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.certificate-item {
    text-align: center;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.certificate-item:hover {
    box-shadow: var(--shadow-md);
}

.certificate-item img {
    max-width: 200px;
    margin: 0 auto 20px;
    border-radius: var(--radius-sm);
}

.certificate-item p {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

/* ========================================
   SLA激光成型技术专区
   ======================================== */
.sla-tech-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.sla-content {
    max-width: 1200px;
    margin: 0 auto;
}

.sla-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 60px;
}

.sla-intro-text h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.sla-intro-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.sla-specs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.sla-spec-item {
    background: white;
    padding: 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.spec-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.spec-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.sla-intro-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.sla-intro-image img {
    width: 100%;
    height: auto;
    display: block;
}

.sla-process-flow {
    background: white;
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.sla-process-flow h3 {
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.sla-flow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
}

.sla-flow-steps::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 0;
}

.sla-step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.step-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   快速成型材料性能展示
   ======================================== */
.materials-section {
    background: white;
}

.materials-content {
    max-width: 1200px;
    margin: 0 auto;
}

.materials-intro {
    text-align: center;
    margin-bottom: 40px;
}

.materials-intro p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.materials-table-wrapper {
    overflow-x: auto;
    margin-bottom: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.materials-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.materials-table thead {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.materials-table th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
}

.materials-table td {
    padding: 14px 20px;
    border-bottom: 1px solid #e2e8f0;
    font-size: 14px;
    color: var(--text-secondary);
}

.materials-table tbody tr:hover {
    background: #f8fafc;
}

.material-name {
    font-weight: 600;
    color: var(--primary-color);
}

.color-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.color-tag.white {
    background: #f1f5f9;
    color: #475569;
    border: 1px solid #cbd5e1;
}

.color-tag.gray {
    background: #e2e8f0;
    color: #475569;
}

.color-tag.transparent {
    background: rgba(200, 230, 255, 0.5);
    color: #0369a1;
    border: 1px solid #7dd3fc;
}

.color-tag.beige {
    background: #fef3c7;
    color: #92400e;
}

.color-tag.black {
    background: #1e293b;
    color: white;
}

.materials-note {
    text-align: center;
    padding: 20px;
    background: #f8fafc;
    border-radius: var(--radius-lg);
}

.materials-note p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   手板复模工艺流程详解
   ======================================== */
.process-gallery-section {
    background: var(--bg-secondary);
}

.process-detail-content {
    max-width: 1200px;
    margin: 0 auto;
}

.process-intro {
    text-align: center;
    margin-bottom: 50px;
}

.process-intro p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.process-steps-timeline {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: 60px;
}

.process-timeline-item {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    background: white;
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.process-timeline-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.timeline-marker {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    flex-shrink: 0;
}

.timeline-content {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 30px;
    flex: 1;
    align-items: center;
}

.timeline-image {
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4/3;
}

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

.timeline-text h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.timeline-text p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-tags span {
    padding: 6px 14px;
    background: #eff6ff;
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

.process-advantages {
    background: white;
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.process-advantages h3 {
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.advantages-grid-small {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    text-align: center;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.advantage-icon-small {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.advantage-icon-small svg {
    width: 24px;
    height: 24px;
    fill: white;
}

.advantage-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.advantage-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ========================================
   手工打造模型展示
   ======================================== */
.handcraft-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
}

.handcraft-section .section-header h2,
.handcraft-section .section-header p {
    color: white;
}

.handcraft-content {
    max-width: 1200px;
    margin: 0 auto;
}

.handcraft-intro {
    text-align: center;
    margin-bottom: 40px;
}

.handcraft-intro p {
    font-size: 16px;
    line-height: 1.8;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

.handcraft-gallery {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    grid-template-rows: repeat(2, 1fr);
    gap: 20px;
}

.handcraft-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.handcraft-item.main-item {
    grid-row: span 2;
    aspect-ratio: auto;
}

.handcraft-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.handcraft-item:hover img {
    transform: scale(1.05);
}

.handcraft-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0,0,0,0.85));
}

.handcraft-overlay h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.handcraft-overlay p {
    font-size: 13px;
    opacity: 0.9;
}

/* ========================================
   技术文档下载
   ======================================== */
.documents-section {
    background: white;
}

.documents-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.document-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid transparent;
}

.document-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.document-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.document-icon svg {
    width: 32px;
    height: 32px;
    fill: white;
}

.document-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.document-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.document-download {
    display: inline-block;
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.document-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 74, 153, 0.3);
}

/* ========================================
   响应式适配
   ======================================== */
@media (max-width: 1024px) {
    .sla-intro {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .sla-flow-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sla-flow-steps::before {
        display: none;
    }
    
    .timeline-content {
        grid-template-columns: 1fr;
    }
    
    .timeline-image {
        max-width: 300px;
    }
    
    .advantages-grid-small {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .handcraft-gallery {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
    
    .handcraft-item.main-item {
        grid-row: span 1;
        grid-column: span 2;
    }
    
    .documents-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sla-specs {
        grid-template-columns: 1fr;
    }
    
    .sla-flow-steps {
        grid-template-columns: 1fr;
    }
    
    .process-timeline-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .timeline-content {
        grid-template-columns: 1fr;
    }
    
    .timeline-image {
        max-width: 100%;
    }
    
    .timeline-tags {
        justify-content: center;
    }
    
    .advantages-grid-small {
        grid-template-columns: 1fr;
    }
    
    .handcraft-gallery {
        grid-template-columns: 1fr;
    }
    
    .handcraft-item.main-item {
        grid-column: span 1;
    }
    
    .documents-grid {
        grid-template-columns: 1fr;
    }
    
    .materials-table-wrapper {
        overflow-x: scroll;
    }
}

/* ========================================
   页脚
   ======================================== */
.site-footer {
    background: var(--bg-dark);
    color: white;
    padding-top: 60px;
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand img {
    height: 60px;
    margin-bottom: 16px;
}

.footer-brand h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.footer-brand p {
    opacity: 0.7;
    font-size: 14px;
}

.footer-links h4,
.footer-services h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-links ul li,
.footer-services ul li {
    margin-bottom: 10px;
}

.footer-links ul li a,
.footer-services ul li a {
    opacity: 0.7;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links ul li a:hover,
.footer-services ul li a:hover {
    opacity: 1;
    color: var(--primary-light);
}

.footer-contact p {
    font-size: 14px;
    margin-bottom: 10px;
    opacity: 0.8;
}

.footer-contact strong {
    color: var(--primary-light);
}

.qr-codes {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.qr-codes img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    background: white;
    padding: 4px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    opacity: 0.6;
}

/* ========================================
   页面通用样式
   ======================================== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 80px 0;
    text-align: center;
    color: white;
}

.page-header h1 {
    font-size: 40px;
    font-weight: 700;
}

.page-content {
    padding: 60px 0;
    background: var(--bg-secondary);
    min-height: 400px;
}

.content-article {
    background: white;
    padding: 50px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    max-width: 900px;
    margin: 0 auto;
}

.content-article h2 {
    font-size: 28px;
    font-weight: 600;
    margin: 40px 0 20px;
    color: var(--text-primary);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-color);
}

.content-article h3 {
    font-size: 22px;
    font-weight: 600;
    margin: 30px 0 15px;
    color: var(--primary-color);
}

.content-article p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.content-article ul {
    list-style: disc;
    padding-left: 24px;
    margin-bottom: 20px;
}

.content-article ul li {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.content-article strong {
    color: var(--primary-color);
    font-weight: 600;
}

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

@media (max-width: 768px) {
    .header-container {
        height: 70px;
    }
    
    .company-name {
        font-size: 16px;
    }
    
    .language-switcher {
        margin-left: 10px;
        padding-left: 10px;
        gap: 4px;
    }
    
    .lang-btn {
        width: 32px;
        height: 32px;
        font-size: 11px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-desc {
        font-size: 15px;
    }
    
    .services-grid,
    .products-grid,
    .equipment-grid,
    .cases-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .process-carousel-slide {
        flex-direction: column;
    }
    
    .process-slide-image,
    .process-slide-content {
        width: 100%;
    }
    
    .process-slide-image {
        min-height: 200px;
    }
    
    .process-slide-content {
        padding: 30px;
    }
    
    .certificates-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .qr-codes {
        justify-content: center;
    }
    
    .content-article {
        padding: 30px 20px;
    }
    
    section {
        padding: 50px 0;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 26px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .process-topic-nav {
        gap: 8px;
    }
    
    .process-topic-tag {
        padding: 8px 14px;
        font-size: 13px;
    }
}

/* ========================================
   动画效果
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-card,
.product-item,
.equipment-item,
.case-item,
.advantage-item {
    animation: fadeInUp 0.6s ease forwards;
}