/* ========================================
   广州胶宝智能装备官网 - 主样式表
   版本: 2.0 (去重合并版)
   最后更新: 2026-06-09
   ======================================== */

/* ========== 1. CSS Variables ========== */
:root {
    --primary-color: #0056b3;
    --secondary-color: #28a745;
    --accent-color: #ff6b00;
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --light-gray: #e9ecef;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
}

/* ========== 2. Base Reset ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fff;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

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

a:hover {
    color: #004494;
    text-decoration: none;
}

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

ul, ol {
    list-style: none;
    margin-bottom: 1rem;
}

/* ========== 3. Keyframes ========== */
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========== 4. Preloader ========== */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.loaded {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 48px;
    height: 48px;
    border: 4px solid var(--light-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ========== 5. Buttons ========== */
.btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.75rem 1.875rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: #004494;
    border-color: #004494;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 86, 179, 0.3);
}

.btn-accent {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.btn-accent:hover {
    background-color: #e65c00;
    border-color: #e65c00;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 0, 0.3);
}

.btn-light {
    background-color: #fff;
    border-color: #fff;
    color: var(--primary-color);
}

.btn-light:hover {
    background-color: #f8f9fa;
    border-color: #f8f9fa;
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 0.9375rem 2.5rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

/* ========== 6. Top Bar / Language Switch ========== */
.top-bar {
    background-color: var(--primary-color);
    color: #fff;
    padding: 0.5rem 0;
    font-size: 0.875rem;
}

.top-bar a {
    color: #fff;
    text-decoration: none;
    transition: var(--transition);
}

.top-bar a:hover {
    color: rgba(255, 255, 255, 0.8);
}

.top-contact span {
    margin-right: 1.5rem;
}

.top-contact i {
    margin-right: 0.5rem;
}

.lang-switch .lang-link {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    margin-left: 0.25rem;
}

.lang-switch .lang-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* ========== 7. Header / Navigation ========== */
.header {
    background-color: #fff;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled,
.header.header-fixed {
    box-shadow: var(--box-shadow-hover);
}

.logo img {
    height: 60px;
    transition: var(--transition);
}

.header.scrolled .logo img {
    height: 50px;
}

.navbar {
    margin-bottom: 0;
    border: none;
    background: transparent;
}

.navbar-brand {
    padding: 10px 15px;
    height: auto;
}

.navbar-nav > li > a {
    padding: 1.5625rem 0.9375rem;
    font-weight: 500;
    color: var(--dark-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    background: transparent !important;
}

.navbar-nav > li > a:hover,
.navbar-nav > li > a:focus,
.navbar-nav > li.active > a {
    color: var(--primary-color);
}

.navbar-nav > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.navbar-nav > li > a:hover::after,
.navbar-nav > li.active > a::after {
    width: 80%;
}

.navbar-toggle {
    margin-top: 18px;
    margin-bottom: 18px;
    border-color: var(--light-gray);
}

.navbar-toggle .icon-bar {
    background-color: var(--dark-color);
}

.nav > li > a {
    padding: 25px 15px;
    font-weight: 500;
    color: var(--dark-color);
    text-transform: uppercase;
    transition: var(--transition);
    position: relative;
}

.nav > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav > li > a:hover,
.nav > li > a:focus,
.nav > li.active > a {
    background: transparent;
    color: var(--primary-color);
}

.nav > li > a:hover::after,
.nav > li.active > a::after {
    width: 80%;
}

/* ========== 8. Hero Slider ========== */
.hero-slider {
    position: relative;
    height: 600px;
    overflow: hidden;
}

.slide-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease;
}

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

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 100%);
}

.slide-content {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    align-items: center;
    color: #fff;
}

.slide-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    line-height: 1.2;
}

.slide-content p {
    font-size: 1.125rem;
    margin-bottom: 1.875rem;
    max-width: 600px;
}

/* ========== 9. Section / Section-Header (Common) ========== */
.section {
    padding: 3.5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 3.125rem;
    height: 3px;
    background-color: var(--primary-color);
}

.section-header p {
    font-size: 0.95rem;
    color: var(--gray-color);
    max-width: 43.75rem;
    margin: 0 auto;
}

/* ========== 10. Advantages ========== */
.advantages-section {
    background-color: var(--light-color);
    padding: 3.5rem 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.advantage-item {
    text-align: center;
    padding: 1.5rem;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    height: 100%;
}

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

.advantage-icon {
    width: 4.375rem;
    height: 4.375rem;
    margin: 0 auto 1rem;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.75rem;
}

.advantage-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.advantage-item p {
    color: var(--gray-color);
    margin-bottom: 0;
    line-height: 1.6;
    font-size: 0.95rem;
}

/* ========== 11. Products / Product Cards ========== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.product-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    margin-bottom: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.product-img {
    height: 220px;
    overflow: hidden;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-img img {
    transform: scale(1.1);
}

.product-card:hover .product-content h3 {
    color: var(--primary-color);
}

.product-content {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.625rem;
    line-height: 1.4;
    transition: var(--transition);
}

.product-content p {
    color: var(--gray-color);
    margin-bottom: 1rem;
    line-height: 1.6;
    flex: 1;
    font-size: 0.95rem;
}

.product-tag {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--accent-color);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    z-index: 1;
}

.product-tagline {
    font-size: 18px;
    color: var(--gray-color);
    margin-bottom: 30px;
    line-height: 1.6;
}

.product-specs {
    background: var(--light-color);
    padding: 20px;
    border-radius: 8px;
}

.product-specs h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
}

.product-cta {
    margin-bottom: 40px;
}

.product-cta .btn {
    margin-right: 15px;
    margin-bottom: 15px;
}

.product-actions {
    display: flex;
    gap: 8px;
    margin-top: auto;
}

.product-actions .btn {
    flex: 1;
    padding: 8px 12px;
    font-size: 13px;
}

.product-desc {
    color: var(--gray-color);
    margin-bottom: 12px;
    line-height: 1.6;
    flex: 1;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 12px 0;
    list-style: none;
    padding: 0;
}

.product-features li {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
    color: var(--gray-color);
}

.product-features li:before {
    content: "\2713";
    color: var(--secondary-color);
    font-weight: bold;
    margin-right: 10px;
}

.product-gallery {
    margin-bottom: 40px;
}

/* ========== 12. Cases / Case Items ========== */
.case-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 1.875rem;
}

.case-img {
    height: 300px;
    overflow: hidden;
}

.case-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 60%);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 1.875rem;
}

.case-item:hover .case-overlay {
    opacity: 1;
}

.case-item:hover .case-img img {
    transform: scale(1.1);
}

.case-overlay .case-content {
    color: #fff;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

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

.case-overlay .case-content h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 0.625rem;
    color: #fff;
}

.case-overlay .case-content p {
    margin-bottom: 0;
    opacity: 0.9;
    color: #fff;
}

.case-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.case-card:hover .case-image img {
    transform: scale(1.1);
}

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

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card .case-content {
    padding: 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.case-card .case-content h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 0.9375rem;
    line-height: 1.4;
}

.case-card .case-content p {
    color: var(--gray-color);
    margin-bottom: 20px;
}

.case-desc {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.6;
    flex: 1;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--light-color);
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 15px;
}

.case-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.4;
}

.case-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--light-gray);
}

.case-meta {
    display: flex;
    justify-content: space-between;
    color: var(--gray-color);
    font-size: 14px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.case-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.case-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--light-gray);
}

/* 案例列表网格（桌面端 3 列） */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.case-body h2 {
    font-size: 24px;
    font-weight: 600;
    margin: 30px 0 20px;
    color: var(--dark-color);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}

.case-body h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 25px 0 15px;
    color: var(--dark-color);
}

.case-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px auto;
    display: block;
    box-shadow: var(--box-shadow);
}

.case-body li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.case-body p {
    margin-bottom: 20px;
    text-align: justify;
}

.case-body ul,
.case-body ol {
    margin-bottom: 20px;
    padding-left: 20px;
}

/* ========== 13. CTA Section ========== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #003d82 100%);
    color: #fff;
    text-align: center;
    padding: 4rem 0;
}

.cta-section h2 {
    font-size: 2.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1rem;
    margin-bottom: 2rem;
    max-width: 43.75rem;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.cta-buttons .btn {
    margin: 0 0.5rem;
    padding: 13px 35px;
    font-size: 15px;
}

/* ========== 14. Footer ========== */
.footer {
    background-color: var(--dark-color);
    color: #fff;
    padding: 4.375rem 0 0;
}

.footer-widget {
    margin-bottom: 2.5rem;
}

.footer-widget h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5625rem;
    position: relative;
    padding-bottom: 0.625rem;
}

.footer-widget h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 2.5rem;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-widget p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #fff;
    padding-left: 5px;
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
}

.contact-info li i {
    margin-right: 0.9375rem;
    font-size: 1.125rem;
    color: var(--primary-color);
    margin-top: 3px;
    min-width: 18px;
}

.social-links a {
    display: inline-block;
    width: 2.25rem;
    height: 2.25rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    text-align: center;
    line-height: 2.25rem;
    color: #fff;
    margin-right: 0.625rem;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.25rem 0;
    margin-top: 1.875rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* ========== 15. Back-to-Top ========== */
.back-to-top {
    position: fixed;
    bottom: 1.875rem;
    right: 1.875rem;
    width: 3.125rem;
    height: 3.125rem;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--accent-color);
    transform: translateY(-5px);
}

.back-to-top i {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ========== 16. Forms ========== */
.form-box {
    background: #fff;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.form-box h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--primary-color);
}

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

.form-group label {
    font-weight: 500;
    margin-bottom: 8px;
    display: block;
}

.form-group .error {
    border-color: #dc3545;
}

.form-control {
    height: 45px;
    border: 1px solid var(--light-gray);
    border-radius: 4px;
    padding: 10px 15px;
    font-size: 16px;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
    outline: none;
}

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

.search-form {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
}

.search-form .form-control {
    flex: 1;
    height: 50px;
    border-radius: 4px 0 0 4px;
    border-right: none;
}

.search-form .btn {
    border-radius: 0 4px 4px 0;
    height: 50px;
    padding: 0 25px;
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.contact-form h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

.error-message {
    color: #dc3545;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

/* ========== 17. Page Header / Breadcrumb ========== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #003d82 100%);
    color: #fff;
    padding: 4rem 0 2.5rem;
    text-align: center;
}

.page-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.page-header p {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
}

.breadcrumb {
    background: transparent;
    padding: 0;
    margin-top: 20px;
}

.breadcrumb .active {
    color: #fff;
    font-weight: 500;
}

.breadcrumb > li + li:before {
    content: ">";
    padding: 0 8px;
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
    color: #fff;
}

/* ========== 18. Product Detail Pages ========== */
.product-detail-section {
    padding: 30px 0;
}

.product-detail-section .row:first-child {
    margin-bottom: 20px;
}

.product-detail-section .product-info {
    padding-left: 25px;
}

.product-detail-section .product-info h1 {
    font-size: 32px;
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: 8px;
}

.product-detail-section .product-tagline {
    font-size: 15px;
    margin-bottom: 12px;
    line-height: 1.5;
}

.product-detail-section .main-image {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    margin-bottom: 12px;
}

.product-detail-section .main-image img {
    width: 100%;
    height: auto;
}

.product-detail-section .product-features {
    margin-bottom: 5px;
}

.product-detail-section .feature-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1px;
    padding: 0;
}

.product-detail-section .feature-item i {
    color: var(--secondary-color);
    font-size: 15px;
    margin-right: 8px;
    margin-top: 2px;
}

.product-detail-section .feature-item p {
    margin-bottom: 0;
    font-size: 14px;
    line-height: 1.35;
}

.product-detail-section .product-specs {
    margin-top: 0;
}

.product-detail-section .product-specs h3 {
    font-size: 15px;
    margin-bottom: 8px;
}

.product-detail-section .spec-item {
    padding: 5px 0;
}

.product-detail-section .product-cta {
    margin-bottom: 10px;
}

.product-detail-section .product-cta .btn {
    margin-bottom: 0;
    padding: 12px 30px;
    font-size: 16px;
    border-radius: 6px;
    margin-right: 10px;
}

.product-detail-section .download-manual {
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    font-size: 14px;
    margin-bottom: 16px;
    text-decoration: none;
}

.product-detail-section .download-manual i {
    margin-right: 6px;
}

.product-detail-section .download-manual:hover {
    text-decoration: underline;
}

.product-detail-section .product-tabs {
    margin-top: 20px;
}

.product-detail-section .nav-tabs {
    margin-bottom: 15px;
}

.product-detail-section .tab-content {
    padding: 8px 0;
}

.product-detail-section .tab-pane h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.product-detail-section .tab-pane p {
    font-size: 15px;
    line-height: 1.65;
    margin-bottom: 12px;
}

.product-detail-section .tab-pane ul {
    margin-bottom: 12px;
}

.product-detail-section .tab-pane li {
    font-size: 15px;
    line-height: 1.65;
    margin-bottom: 6px;
}

.product-detail-section .application-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.product-detail-section .application-item {
    text-align: center;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.product-detail-section .application-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-hover);
}

.product-detail-section .application-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 0;
}

.main-image {
    width: 100%;
    height: 400px;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 12px;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.product-info h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.2;
}

.product-tagline {
    font-size: 16px;
    color: var(--gray-color);
    margin-bottom: 18px;
    line-height: 1.6;
}

.thumbnail-item {
    width: 70px;
    height: 70px;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumbnail-item.active,
.thumbnail-item:hover {
    border-color: var(--primary-color);
}

.thumbnails {
    display: flex;
    gap: 8px;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.specs-table th {
    background: var(--light-color);
    font-weight: 600;
    width: 30%;
}

.specs-table th,
.specs-table td {
    padding: 12px;
    border: 1px solid #eee;
    text-align: left;
}

.specs-table td {
    color: var(--gray-color);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px solid var(--light-gray);
}

.spec-item:last-child {
    border-bottom: none;
}

.spec-label {
    font-weight: 500;
}

.spec-table th {
    background: var(--light-color);
    font-weight: 600;
}

.spec-table th,
.spec-table td {
    padding: 10px 12px;
    text-align: left;
    border: 1px solid var(--light-gray);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.comparison-table th {
    background: var(--primary-color);
    color: #fff;
    font-weight: 600;
}

.comparison-table th,
.comparison-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.comparison-table td:first-child {
    font-weight: 500;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.related-products {
    padding: 40px 0;
    background: var(--light-color);
}

.related-products .section-header {
    margin-bottom: 25px;
}

.related-products h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.related-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.related-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.related-card .card-body {
    padding: 20px;
}

.related-card h4 {
    font-size: 16px;
    margin-bottom: 10px;
}

.related-card p {
    color: #666;
    font-size: 13px;
    margin-bottom: 15px;
}

.related-card a {
    color: #097ef9;
    font-size: 14px;
    text-decoration: none;
    font-weight: 500;
}

.related-card a:hover {
    color: #f89602;
}

.related-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

/* ========== 19. About Page ========== */
.about-content {
    padding: 40px 0;
}

.about-content h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.about-content h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

.about-content h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--gray-color);
}

.about-image {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    height: 100%;
}

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

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.application-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-top: 30px;
}

.application-item {
    text-align: center;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.application-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 0;
}

.application-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 12px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.culture-item {
    text-align: center;
    padding: 30px;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    height: 100%;
}

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

.culture-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
}

.culture-item p {
    color: var(--gray-color);
    margin-bottom: 0;
    line-height: 1.6;
}

.culture-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

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

.team-member {
    text-align: center;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.team-member img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin-bottom: 20px;
    object-fit: cover;
}

.team-member h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 5px;
}

.team-member p {
    color: var(--gray-color);
}

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

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

.member-info {
    padding: 20px;
}

.member-info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 5px;
}

.member-info p {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 500;
}

.member-info .member-desc {
    color: var(--gray-color);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 0;
}

/* ===== 发展历程 - 现代卡片式时间轴 ===== */
.timeline-section {
    background: linear-gradient(180deg, #f8f9fa 0%, #fff 100%);
    padding: 80px 0;
}

.timeline-modern {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline-track {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    position: relative;
}

/* 顶部连接线 */
.timeline-track::before {
    content: '';
    position: absolute;
    top: 52px;
    left: 8.33%;
    right: 8.33%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color) 0%, #4dabf7 50%, var(--primary-color) 100%);
    border-radius: 2px;
    z-index: 0;
}

.timeline-node {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 圆点 + 年份 */
.node-dot {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
    transition: var(--transition);
    margin-bottom: 22px;
    box-shadow: 0 0 0 6px rgba(0, 86, 179, 0.08);
}

.node-dot .node-year {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.timeline-node:nth-child(even) .node-dot {
    margin-top: 55px;
}

.timeline-node:nth-child(odd) .node-dot {
    margin-bottom: 22px;
}

/* 卡片 */
.node-card {
    background: #fff;
    border-radius: 12px;
    padding: 24px 16px 18px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    text-align: center;
    transition: var(--transition);
    position: relative;
    width: 100%;
    border: 1px solid rgba(0, 86, 179, 0.06);
}

.node-card::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid #fff;
}

.timeline-node:nth-child(even) .node-card {
    order: -1;
    margin-bottom: 22px;
}

.timeline-node:nth-child(even) .node-card::before {
    top: auto;
    bottom: -8px;
    border-top: 8px solid #fff;
    border-bottom: none;
}

.node-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 36px rgba(0, 86, 179, 0.15);
    border-color: rgba(0, 86, 179, 0.15);
}

/* 图标 */
.node-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #4dabf7 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    color: #fff;
    font-size: 20px;
    transition: var(--transition);
}

.node-card:hover .node-icon {
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(0, 86, 179, 0.35);
}

.node-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 10px;
    transition: var(--transition);
}

.node-card:hover h3 {
    color: var(--primary-color);
}

.node-card p {
    font-size: 13px;
    color: var(--gray-color);
    line-height: 1.7;
    margin-bottom: 0;
}

/* ==========================================
   定制化解决方案页（customized-solutions.html）
   将原内联 style 提取为 class，消除 HTMLHint inline-style 警告
   ========================================== */

/* 定制流程卡片内边距 */
.process-card {
    padding: 30px;
}

/* 流程步骤圆形数字徽标 */
.step-circle {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #0056b3, #003d82);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
    font-weight: bold;
}

/* 定制案例区底色 */
.custom-cases-section {
    background: #f8f9fa;
}

/* 定制案例区弹性行 */
.cases-row {
    display: flex;
    flex-wrap: wrap;
    margin-top: 30px;
}

/* 定制方案说明备注 */
.custom-note {
    margin-top: 20px;
    color: var(--gray-color);
}

/* 案例图标通用样式（高度/居中/字号），颜色由修饰类提供 */
.case-icon {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 48px;
}

/* 案例图标配色修饰类 */
.case-icon--blue {
    background: linear-gradient(135deg, #0056b3, #003d82);
}

.case-icon--green {
    background: linear-gradient(135deg, #28a745, #1e7e34);
}

.case-icon--orange {
    background: linear-gradient(135deg, #ff6b00, #e65c00);
}

.case-icon--teal {
    background: linear-gradient(135deg, #17a2b8, #0f6674);
}

/* 响应式 */
@media (max-width: 991px) {
    .timeline-track {
        grid-template-columns: repeat(3, 1fr);
        gap: 25px;
    }

    .timeline-track::before {
        left: 8%;
        right: 8%;
    }

    .timeline-node:nth-child(even) .node-dot {
        margin-top: 0;
    }

    .timeline-node:nth-child(even) .node-card {
        order: 0;
        margin-bottom: 0;
    }

    .timeline-node:nth-child(even) .node-card::before {
        top: -8px;
        bottom: auto;
        border-top: none;
        border-bottom: 8px solid #fff;
    }
}

@media (max-width: 767px) {
    .timeline-section {
        padding: 50px 0;
    }

    .timeline-track {
        grid-template-columns: 1fr;
        gap: 30px;
        padding-left: 30px;
    }

    .timeline-track::before {
        top: 0;
        bottom: 0;
        left: 18px;
        right: auto;
        width: 3px;
        height: auto;
    }

    .timeline-node {
        flex-direction: row;
        align-items: flex-start;
        gap: 20px;
    }

    .node-dot {
        flex-shrink: 0;
        margin-top: 15px;
        margin-bottom: 0;
        width: 42px;
        height: 42px;
    }

    .node-dot .node-year {
        font-size: 12px;
    }

    .timeline-node:nth-child(even) .node-dot {
        margin-top: 15px;
    }

    .timeline-node:nth-child(even) .node-card {
        order: 0;
        margin-bottom: 0;
    }

    .node-card::before,
    .timeline-node:nth-child(even) .node-card::before {
        top: 20px;
        left: -10px;
        right: auto;
        bottom: auto;
        transform: none;
        border-top: 10px solid transparent;
        border-bottom: 10px solid transparent;
        border-right: 10px solid #fff;
        border-left: none;
    }
}

.stats-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #003d82 100%);
    color: #fff;
    padding: 60px 0;
}

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

.stats-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stats-label {
    font-size: 16px;
    opacity: 0.9;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--light-color);
    border-radius: 8px;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray-color);
}

.qualification-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.qualification-item {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.qualification-item img {
    width: 100%;
    height: 200px;
    object-fit: contain;
    padding: 20px;
}

.qualification-item h4 {
    text-align: center;
    padding: 15px;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: 500;
    border-top: 1px solid var(--light-gray);
}

/* 资质荣誉 - 单张大图 */
.qualification-single {
    margin-top: 40px;
}

.qualification-placeholder {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.qualification-placeholder img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* 核心团队 - 集体照大图 */
.team-photo-wrapper {
    margin-top: 40px;
}

.team-photo {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.team-photo img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* 企业宣传视频区块 */
.company-video-section {
    background: var(--light-color, #f7f9fc);
}
.company-video-wrapper {
    max-width: 960px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--box-shadow, 0 8px 30px rgba(0, 0, 0, 0.12));
    background: #000;
}
.company-video {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    background: #000;
}
.feature-item {
    text-align: center;
    padding: 30px;
}

.feature-item i {
    font-size: 48px;
    color: #097ef9;
    margin-bottom: 20px;
}

.feature-item h4 {
    font-size: 18px;
    margin-bottom: 10px;
}

.feature-item p {
    color: #666;
    font-size: 14px;
}

.feature-box {
    background: #fff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.feature-box h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
}

.feature-list li:before {
    content: "\2713";
    color: var(--secondary-color);
    font-weight: bold;
    margin-right: 10px;
    font-size: 18px;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-tag {
    background: var(--light-color);
    color: var(--primary-color);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
}

.features-section {
    padding: 60px 0;
    background: #f8f9fa;
}

.value-item {
    text-align: center;
    padding: 30px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 30px;
}

.value-item h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
}

.value-item p {
    color: var(--gray-color);
}

.value-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
}

.benefit-card {
    text-align: center;
    padding: 40px 30px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.benefit-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
}

.benefit-card p {
    color: var(--gray-color);
}

.benefit-highlight {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #1e7e34 100%);
    color: #fff;
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    margin: 30px 0;
}

.benefit-highlight h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.benefit-highlight p {
    font-size: 18px;
    opacity: 0.9;
    margin: 0;
}

.benefit-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 36px;
}

.logo-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.logo-item {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    padding: 20px;
    transition: var(--transition);
}

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

.logo-item img {
    max-width: 100%;
    max-height: 60px;
    object-fit: contain;
    transition: var(--transition);
}

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

.testimonial-content {
    font-style: italic;
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.testimonial-author {
    text-align: right;
    font-weight: 600;
    color: var(--primary-color);
}

.testimonial-author span {
    font-weight: 400;
    color: var(--gray-color);
}

/* ========== 20. News Pages ========== */
.news-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.news-card:hover .news-img img {
    transform: scale(1.1);
}

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

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-content {
    padding: 25px;
}

.news-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-content h3 a {
    color: var(--dark-color);
    text-decoration: none;
    transition: var(--transition);
}

.news-content h3 a:hover {
    color: var(--primary-color);
}

.news-content p {
    color: var(--gray-color);
    margin-bottom: 15px;
    font-size: 15px;
}

.news-category {
    display: inline-block;
    background: var(--primary-color);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 15px;
}

.news-category.industry {
    background: var(--accent-color);
}

.news-category.tech {
    background: var(--secondary-color);
}

.news-meta {
    display: flex;
    justify-content: space-between;
    color: var(--gray-color);
    font-size: 13px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.article-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--light-gray);
}

.article-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.4;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    font-size: 14px;
    color: var(--gray-color);
}

.article-meta i {
    margin-right: 5px;
}

.article-meta span {
    margin-right: 20px;
    margin-bottom: 10px;
}

.article-body {
    font-size: 16px;
    line-height: 1.8;
    color: var(--dark-color);
}

.article-body h2 {
    font-size: 24px;
    font-weight: 600;
    margin: 30px 0 20px;
    color: var(--dark-color);
}

.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 25px 0 15px;
    color: var(--dark-color);
}

.article-body p {
    margin-bottom: 20px;
    text-align: justify;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px auto;
    display: block;
    box-shadow: var(--box-shadow);
}

.article-body ul,
.article-body ol {
    margin-bottom: 20px;
    padding-left: 20px;
}

.article-body li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.article-body blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 15px 20px;
    margin: 20px 0;
    background: var(--light-color);
    border-radius: 0 4px 4px 0;
    font-style: italic;
    color: var(--gray-color);
}

.sidebar-widget {
    background: #fff;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.sidebar-widget h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.sidebar-widget ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-widget ul li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.sidebar-widget ul li a {
    color: var(--gray-color);
    text-decoration: none;
    transition: var(--transition);
}

.sidebar-widget ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.sidebar-widget ul li:last-child {
    border-bottom: none;
}

.sidebar-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.hot-news-item {
    display: flex;
    align-items: flex-start;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
    text-decoration: none;
    color: inherit;
}
.hot-news-item:hover {
    background: rgba(0, 86, 179, 0.04);
}
.hot-news-item:hover h4 {
    color: var(--primary-color);
}

.hot-news-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.hot-news-image {
    width: 80px;
    height: 60px;
    flex-shrink: 0;
    margin-right: 15px;
    border-radius: 4px;
    overflow: hidden;
}

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

.hot-news-content h4 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 5px;
    line-height: 1.4;
}

.hot-news-date {
    font-size: 12px;
    color: var(--gray-color);
}

.related-news h3,
.related-cases h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.share-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.share-title {
    font-weight: 500;
    margin-right: 15px;
    margin-bottom: 10px;
}

.share-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: var(--transition);
}

.share-btn:hover {
    transform: translateY(-3px);
}

.share-link {
    background: var(--primary-color);
}

.share-wechat {
    background: #07c160;
}

.share-weibo {
    background: #e6162d;
}

.share-qq {
    background: #12b7f5;
}

/* ========== 21. Download Pages ========== */
.download-section {
    padding: 80px 0;
}

.download-hero h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
}

.download-hero p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.download-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    height: 100%;
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
    border-color: var(--primary-color);
}

.download-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--dark-color);
}

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

.download-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #003d82 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.download-icon i {
    font-size: 36px;
    color: #fff;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    background: var(--primary-color);
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    width: 100%;
}

.download-btn:hover {
    background: #004494;
    color: #fff;
    text-decoration: none;
}

.download-btn i {
    margin-right: 8px;
}

.download-btn.disabled {
    background: #ccc;
    cursor: not-allowed;
}

.download-meta {
    font-size: 13px;
    color: #999;
    margin-bottom: 20px;
}

.download-meta span {
    margin-right: 15px;
}

.notice-box {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 40px;
}

.notice-box h4 {
    color: #856404;
    margin-bottom: 10px;
}

.notice-box p {
    color: #856404;
    margin: 0;
    font-size: 14px;
}

.quick-consult h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
}

.quick-consult p {
    margin-bottom: 20px;
    opacity: 0.9;
}

.quick-consult .btn {
    background: #fff;
    color: var(--primary-color);
    border-color: #fff;
}

.quick-consult .btn:hover {
    background: var(--light-color);
    border-color: var(--light-color);
}

/* ========== 22. Contact Page ========== */
.contact-info-box {
    background: #fff;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    height: 100%;
}

.contact-info-box h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.contact-info-box h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 25px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    margin-right: 15px;
    flex-shrink: 0;
}

.contact-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-content p {
    margin-bottom: 0;
    color: var(--gray-color);
    line-height: 1.6;
}

.contact-content a {
    color: var(--gray-color);
    text-decoration: none;
    transition: var(--transition);
}

.contact-content a:hover {
    color: var(--primary-color);
}

.contact-methods {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.contact-method {
    display: flex;
    align-items: center;
    color: var(--dark-color);
}

.contact-method i {
    margin-right: 8px;
    color: var(--primary-color);
}

.contact-box {
    background: var(--light-color);
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.contact-box h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
}

.contact-box p {
    margin-bottom: 15px;
    color: var(--gray-color);
}

.business-hours h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
}

.hours-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--light-gray);
}

.hours-item:last-child {
    border-bottom: none;
}

.hours-day {
    font-weight: 500;
}

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

.info-icon {
    width: 60px;
    height: 60px;
    background: var(--light-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    flex-shrink: 0;
}

.info-icon i {
    font-size: 24px;
    color: var(--primary-color);
}

.info-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 5px;
}

.info-content p {
    color: var(--gray-color);
    margin: 0;
}

.map-section {
    height: 400px;
    background: #e9ecef;
}

.map-container {
    height: 400px;
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* 自绘交互式地图卡片（不依赖外部地图服务） */
.custom-map {
    position: relative;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(rgba(0,86,179,0.04) 1px, transparent 1px) 0 0 / 100% 40px,
        linear-gradient(90deg, rgba(0,86,179,0.04) 1px, transparent 1px) 0 0 / 40px 100%,
        radial-gradient(circle at 30% 20%, #e8f3ff 0%, #cfe4ff 40%, #b8d8ff 100%);
    overflow: hidden;
}
.custom-map__roads {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(115deg, transparent 47%, #fff 47%, #fff 50%, transparent 50%),
        linear-gradient(25deg, transparent 60%, #fff 60%, #fff 63%, transparent 63%),
        linear-gradient(0deg, transparent 30%, rgba(255,255,255,0.7) 30%, rgba(255,255,255,0.7) 32%, transparent 32%);
}
.custom-map__pin {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -100%);
    text-align: center;
}
.custom-map__pin-dot {
    width: 22px;
    height: 22px;
    background: #e63946;
    border: 3px solid #fff;
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    margin: 0 auto;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}
.custom-map__card {
    position: absolute;
    left: 20px;
    bottom: 20px;
    background: #fff;
    border-radius: 10px;
    padding: 14px 18px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    max-width: 70%;
}
.custom-map__card h4 {
    margin: 0 0 4px;
    font-size: 15px;
    color: var(--dark-color);
}
.custom-map__card p {
    margin: 0 0 10px;
    font-size: 13px;
    color: var(--gray-color);
    line-height: 1.5;
}
.custom-map__card a {
    display: inline-block;
    margin-right: 10px;
    font-size: 13px;
    color: var(--primary-color);
    text-decoration: none;
}
.custom-map__card a:hover { text-decoration: underline; }

/* ========== 浮动拨号按钮（移动端） ========== */
.floating-call {
    position: fixed;
    right: 18px;
    bottom: 20px;
    z-index: 999;
    display: none; /* 默认隐藏，仅移动端显示 */
}
.floating-call__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: #ff6b00;
    color: #fff;
    font-size: 24px;
    box-shadow: 0 4px 14px rgba(255, 107, 0, 0.45);
    text-decoration: none;
    animation: callPulse 1.8s infinite;
}
.floating-call__btn:active { transform: scale(0.94); }
.floating-call__btn:hover { color: #fff; text-decoration: none; }
@keyframes callPulse {
    0%   { box-shadow: 0 4px 14px rgba(255, 107, 0, 0.45); }
    50%  { box-shadow: 0 4px 14px rgba(255, 107, 0, 0.45), 0 0 0 10px rgba(255, 107, 0, 0.12); }
    100% { box-shadow: 0 4px 14px rgba(255, 107, 0, 0.45); }
}
.floating-call__bubble {
    position: absolute;
    right: 0;
    bottom: 64px;
    display: none;
    flex-direction: column;
    background: #fff;
    border-radius: 10px;
    padding: 8px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
    min-width: 220px;
}
.floating-call.open .floating-call__bubble {
    display: flex;
}
.floating-call__opt {
    display: block;
    padding: 10px 14px;
    font-size: 14px;
    color: var(--dark-color);
    text-decoration: none;
    border-radius: 6px;
    white-space: nowrap;
}
.floating-call__opt:hover {
    background: rgba(0, 86, 179, 0.08);
    color: var(--primary-color);
    text-decoration: none;
}
.floating-call__opt + .floating-call__opt {
    margin-top: 4px;
    border-top: 1px solid #f0f0f0;
}

/* ========== 23. Sitemap / Error Pages ========== */
.sitemap-section {
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    padding: 30px;
    margin-bottom: 30px;
    height: 100%;
    transition: var(--transition);
}

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

.sitemap-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
    display: flex;
    align-items: center;
}

.sitemap-title i {
    margin-right: 10px;
    color: var(--primary-color);
}

.sitemap-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sitemap-links li {
    margin-bottom: 12px;
    padding-left: 15px;
    position: relative;
}

.sitemap-links li::before {
    content: "\2022";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.sitemap-links a {
    color: var(--dark-color);
    transition: var(--transition);
    display: inline-block;
}

.sitemap-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.sitemap-links .sub-links {
    margin-top: 8px;
    margin-left: 15px;
    padding-left: 15px;
    border-left: 1px dashed var(--light-gray);
}

.sitemap-links .sub-links li {
    font-size: 14px;
    margin-bottom: 8px;
}

.sitemap-links .sub-links li::before {
    content: "\25E6";
}

.sitemap-search h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
}

.error-page {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 0;
}

.error-code {
    font-size: 120px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 20px;
}

.error-title {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.error-content {
    max-width: 600px;
}

.error-message-page {
    font-size: 16px;
    color: var(--gray-color);
    margin-bottom: 30px;
    line-height: 1.6;
}

.error-actions {
    margin-bottom: 40px;
}

.error-actions .btn {
    margin: 0 10px 10px;
}

.error-links {
    border-top: 1px solid var(--light-gray);
    padding-top: 30px;
}

.error-links h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.error-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.error-links a {
    color: var(--gray-color);
    transition: var(--transition);
}

.error-links a:hover {
    color: var(--primary-color);
}

/* ========== 24. Tab / Filter / Pagination ========== */
.nav-tabs {
    border-bottom: 2px solid var(--light-gray);
    margin-bottom: 30px;
}

.nav-tabs > li > a {
    border: none;
    border-radius: 0;
    padding: 15px 25px;
    font-size: 16px;
    font-weight: 500;
    color: var(--gray-color);
    background: transparent;
    margin-right: 5px;
}

.nav-tabs > li > a:hover {
    border: none;
    background: transparent;
    color: var(--primary-color);
}

.nav-tabs > li.active > a,
.nav-tabs > li.active > a:hover,
.nav-tabs > li.active > a:focus {
    border: none;
    border-bottom: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
}

.tab-content {
    padding: 20px 0;
}

.tab-pane h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
}

.tab-pane p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.tab-pane ul {
    margin-bottom: 20px;
    padding-left: 20px;
}

.tab-pane li {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 10px;
    list-style: disc;
}

.filter-btn {
    display: inline-block;
    padding: 8px 20px;
    margin: 0 4px 8px;
    background: #fff;
    border: 1px solid var(--light-gray);
    border-radius: 30px;
    font-size: 13px;
    font-weight: 500;
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 86, 179, 0.2);
}

.product-filter {
    text-align: center;
    margin-bottom: 25px;
}

.product-filter-section {
    padding-top: 2.5rem;
}

.pagination li a {
    border: none;
    border-radius: 4px;
    margin: 0 5px;
    color: var(--dark-color);
    background: #fff;
    box-shadow: var(--box-shadow);
}

.pagination li a:hover,
.pagination li.active a {
    background: var(--primary-color);
    color: #fff;
}

.result-card {
    text-align: center;
    padding: 25px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #003d82 100%);
    color: #fff;
    border-radius: 8px;
    transition: var(--transition);
}

.result-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 86, 179, 0.3);
}

.result-number {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 5px;
}

.result-label {
    font-size: 14px;
    opacity: 0.9;
}

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

.result-unit {
    font-size: 18px;
}

.nav-item {
    flex: 1;
    min-width: 250px;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    padding: 20px;
    transition: var(--transition);
}

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

.nav-item:hover .nav-title {
    color: var(--primary-color);
}

.nav-title {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.5;
    color: var(--dark-color);
    transition: var(--transition);
}

.nav-label {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 10px;
}

.meta-item {
    background: var(--light-color);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.meta-label {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 5px;
}

.meta-value {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

/* ========== 25. Utility Classes ========== */
.thumbnail {
    width: 80px;
    height: 80px;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

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

.thumbnail.active,
.thumbnail:hover {
    border-color: var(--primary-color);
}

.article-navigation {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 40px;
}

/* ========== 26. Responsive Media Queries ========== */

/* 991px and below */
@media (max-width: 991px) {
    .hero-slider {
        height: 500px;
    }

    .slide-content h1 {
        font-size: 36px;
    }

    .section {
        padding: 50px 0;
    }

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

    .product-detail-section .product-info {
        padding-left: 0;
        margin-top: 15px;
    }

    .product-detail-section .product-info h1 {
        font-size: 26px;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* 768px and below */
@media (max-width: 768px) {
    /* 移动端显示浮动拨号按钮 */
    .floating-call {
        display: block;
    }

    .download-hero h1 {
        font-size: 28px;
    }

    .download-hero p {
        font-size: 16px;
    }

    .download-card {
        margin: 0 20px;
        padding: 30px 20px;
    }
}

/* 767px and below - Main responsive breakpoint */
@media (max-width: 767px) {
    .page-header h1 {
        font-size: 28px;
    }

    .page-header {
        padding: 3rem 0 2rem;
    }

    .hero-slider {
        height: 400px;
    }

    .slide-content h1 {
        font-size: 28px;
    }

    .slide-content p {
        font-size: 16px;
    }

    .section {
        padding: 40px 0;
    }

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

    .cta-section h2 {
        font-size: 26px;
    }

    .cta-section {
        padding: 3rem 0;
    }

    .cta-buttons .btn {
        display: block;
        margin: 10px auto;
        width: 80%;
    }

    .about-content h2 {
        font-size: 26px;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

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

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

    .qualification-placeholder {
        max-width: 100%;
    }

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

    .team-photo {
        max-width: 100%;
    }

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

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

    .product-info h1 {
        font-size: 24px;
    }

    .nav-tabs > li > a {
        padding: 10px 15px;
        font-size: 14px;
    }

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

    .case-content {
        padding: 20px;
    }

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

    .case-meta-grid {
        grid-template-columns: 1fr;
    }

    .case-results {
        grid-template-columns: 1fr;
    }

    .result-number {
        font-size: 22px;
    }

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

    .case-body h3 {
        font-size: 18px;
    }

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

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

    .filter-btn {
        padding: 8px 15px;
        font-size: 13px;
        margin: 0 5px 10px;
    }

    .contact-form,
    .contact-info-box {
        padding: 20px;
    }

    .map-container {
        height: 250px;
    }

    .article-content {
        padding: 20px;
    }

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

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

    .article-body h3 {
        font-size: 18px;
    }

    .article-navigation {
        flex-direction: column;
    }

    .nav-item {
        min-width: 100%;
    }

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

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

    .product-actions {
        flex-direction: column;
    }

    .error-code {
        font-size: 80px;
    }

    .error-title {
        font-size: 24px;
    }

    .error-actions .btn {
        display: block;
        margin: 10px auto;
        width: 80%;
    }

    .contact-methods {
        flex-direction: column;
        gap: 10px;
    }

    .sitemap-section {
        padding: 20px;
    }

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

    .search-form {
        flex-direction: column;
    }

    .search-form .form-control {
        border-radius: 4px;
        border-right: 1px solid var(--light-gray);
        margin-bottom: 10px;
    }

    .search-form .btn {
        border-radius: 4px;
        width: 100%;
    }

    .timeline-track {
        grid-template-columns: 1fr;
        gap: 30px;
        padding-left: 30px;
    }

    .timeline-track::before {
        top: 0;
        bottom: 0;
        left: 18px;
        right: auto;
        width: 3px;
        height: auto;
    }

    .timeline-node {
        flex-direction: row;
        align-items: flex-start;
        gap: 20px;
    }

    .node-dot {
        flex-shrink: 0;
        margin-top: 15px !important;
        margin-bottom: 0 !important;
        width: 42px;
        height: 42px;
    }

    .node-dot .node-year {
        font-size: 12px;
    }

    .node-card::before {
        top: 20px !important;
        left: -10px !important;
        right: auto !important;
        bottom: auto !important;
        transform: none !important;
        border-top: 10px solid transparent !important;
        border-bottom: 10px solid transparent !important;
        border-right: 10px solid #fff !important;
        border-left: none !important;
    }

    .benefit-highlight h2 {
        font-size: 36px;
    }

    /* Product detail page responsive */
    .product-detail-section .page-header h1 {
        font-size: 26px;
    }

    .product-detail-section .product-info h1 {
        font-size: 24px;
    }

    .product-detail-section .nav-tabs > li > a {
        padding: 10px 15px;
        font-size: 14px;
    }

    .product-detail-section .application-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 480px and below - Small mobile */
@media (max-width: 480px) {
    .logo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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