:root {
    --color-primary: #BF1A20;
    --color-primary-dark: #9a1519;
    --color-primary-light: #e5454a;
    --color-dark: #1a1a1a;
    --color-dark-secondary: #2a2a2a;
    --color-gray: #666666;
    --color-gray-light: #999999;
    --color-light: #f5f5f5;
    --color-light-secondary: #fafafa;
    --color-white: #ffffff;
    --color-border: #e8e8e8;
    --color-overlay: rgba(0, 0, 0, 0.5);
    
    --font-primary: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    --font-secondary: Arial, "Helvetica Neue", sans-serif;
    
    --container-max: 1200px;
    --header-height: 80px;
    --header-top-height: 36px;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
    
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--color-dark);
    line-height: 1.7;
    background: var(--color-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

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

/* ==================== Typography ==================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

p {
    margin-bottom: 1rem;
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    text-align: center;
    cursor: pointer;
    gap: 8px;
}

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

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

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

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

.btn-block {
    width: 100%;
}

/* ==================== Header ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-white);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-top {
    background: var(--color-dark);
    color: var(--color-gray-light);
    font-size: 14px;
    height: var(--header-top-height);
    line-height: var(--header-top-height);
    transition: var(--transition);
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.welcome-text {
    opacity: 0.8;
}

.header-main {
    height: var(--header-height);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.header-main .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo img {
    height: 50px;
    width: auto;
}

/* ==================== Navigation ==================== */
.nav-list {
    display: flex;
    gap: 4px;
}

.nav-list > li > a {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-dark);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    white-space: nowrap;
    gap: 4px;
}

.nav-list > li > a:hover,
.nav-list > li > a.active {
    color: var(--color-primary);
    background: rgba(191, 26, 32, 0.05);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--color-white);
    min-width: 160px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 8px 0;
    z-index: 100;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--color-dark);
    transition: var(--transition);
}

.dropdown-menu li a:hover {
    background: rgba(191, 26, 32, 0.05);
    color: var(--color-primary);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 32px;
    height: 24px;
    gap: 6px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-dark);
    transition: var(--transition);
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ==================== Hero / Banner ==================== */
.hero {
    margin-top: calc(var(--header-height) + var(--header-top-height));
    position: relative;
    height: 560px;
    overflow: hidden;
}

.heroSwiper {
    width: 100%;
    height: 100%;
}

.hero .swiper-slide {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 6s ease;
}

.swiper-slide-active .slide-bg {
    transform: scale(1.05);
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.45);
}

.slide-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--color-white);
    max-width: 700px;
    padding: 0 20px;
}

.slide-content h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    animation: fadeInUp 0.8s ease;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.slide-content p {
    font-size: 18px;
    margin-bottom: 28px;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.slide-content .btn {
    animation: fadeInUp 0.8s ease 0.4s both;
    font-size: 16px;
    padding: 14px 40px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Swiper Custom */
.hero .swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: rgba(255,255,255,0.5);
    opacity: 1;
}

.hero .swiper-pagination-bullet-active {
    background: var(--color-primary);
}

.hero .swiper-button-prev,
.hero .swiper-button-next {
    color: var(--color-white);
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    transition: var(--transition);
}

.hero .swiper-button-prev:hover,
.hero .swiper-button-next:hover {
    background: var(--color-primary);
}

.hero .swiper-button-prev::after,
.hero .swiper-button-next::after {
    font-size: 20px;
}

/* ==================== Sections ==================== */
.section {
    padding: 80px 0;
}

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

.section-header.text-left {
    text-align: left;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.section-title.text-white {
    color: var(--color-white);
}

.section-subtitle {
    font-size: 14px;
    color: var(--color-gray-light);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
    font-family: var(--font-secondary);
}

.section-line {
    width: 50px;
    height: 3px;
    background: var(--color-primary);
    margin: 0 auto;
    border-radius: 2px;
}

.section-header.text-left .section-line {
    margin: 0;
}

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

.bg-dark {
    background: var(--color-dark);
}

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

.mt-2 {
    margin-top: 40px;
}

/* ==================== Products Grid ==================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.product-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

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

.product-img {
    overflow: hidden;
    aspect-ratio: 4 / 3;
}

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

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

.product-info {
    padding: 16px;
    text-align: center;
}

.product-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-dark);
    transition: var(--transition);
}

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

/* ==================== News Grid ==================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 28px;
    display: flex;
    gap: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.news-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    height: 60px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.news-date .day {
    font-size: 22px;
    font-weight: 700;
    line-height: 1;
}

.news-date .month {
    font-size: 11px;
    opacity: 0.9;
}

.news-content h3 {
    font-size: 17px;
    margin-bottom: 8px;
}

.news-content h3 a {
    color: var(--color-dark);
    transition: var(--transition);
}

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

.news-content p {
    font-size: 14px;
    color: var(--color-gray);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.read-more:hover {
    color: var(--color-primary-dark);
}

/* ==================== About Section ==================== */
.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 420px;
}

.about-content p {
    color: var(--color-gray);
    font-size: 15px;
    line-height: 1.9;
}

/* ==================== Cases Section ==================== */
.case-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.case-tab {
    padding: 10px 28px;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 30px;
    transition: var(--transition);
}

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

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

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

.case-img {
    width: 100%;
    height: 100%;
}

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

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

.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: var(--color-white);
    transform: translateY(0);
    transition: var(--transition);
}

.case-overlay h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.case-overlay p {
    font-size: 14px;
    opacity: 0.8;
    margin: 0;
}

.case-item:hover .case-overlay {
    padding-bottom: 32px;
}

/* ==================== Partners ==================== */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-size: 15px;
    font-weight: 500;
    color: var(--color-gray);
    min-height: 80px;
}

.partner-item:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

/* ==================== Contact Section ==================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.contact-info-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 28px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.contact-info-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.contact-icon {
    width: 56px;
    height: 56px;
    background: rgba(191, 26, 32, 0.1);
    color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 14px;
    color: var(--color-gray-light);
    margin-bottom: 4px;
    font-weight: 500;
}

.contact-detail p {
    font-size: 16px;
    color: var(--color-dark);
    font-weight: 500;
    margin: 0;
}

.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
}

.contact-form {
    background: var(--color-white);
    padding: 36px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: var(--transition);
    background: var(--color-light-secondary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(191, 26, 32, 0.1);
}

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

/* ==================== Footer ==================== */
.footer {
    background: var(--color-dark);
    color: rgba(255,255,255,0.7);
}

.footer-main {
    padding: 60px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
}

.footer-logo {
    height: 45px;
    margin-bottom: 16px;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.footer-about p {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-qr {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.qr-placeholder {
    width: 70px;
    height: 70px;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    border-radius: var(--radius-sm);
}

.footer-col h4 {
    color: var(--color-white);
    font-size: 17px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--color-primary);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 14px;
    transition: var(--transition);
    opacity: 0.8;
}

.footer-col ul li a:hover {
    color: var(--color-primary);
    opacity: 1;
    padding-left: 6px;
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    margin-bottom: 12px;
}

.contact-list li i {
    color: var(--color-primary);
    margin-top: 4px;
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 14px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.6);
}
.footer-bottom h1{font-size:16px;}

.footer-bottom a:hover {
    color: var(--color-primary);
}

/* ==================== Back to Top ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ==================== Page Banner (Subpages) ==================== */
.page-banner {
    margin-top: calc(var(--header-height) + var(--header-top-height));
    height: 300px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    background-color: var(--color-dark);
}

.page-banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.55);
}

.page-banner-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
}

.page-banner-content h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-banner-content .breadcrumb {
    font-size: 14px;
    opacity: 0.8;
}

.page-banner-content .breadcrumb a {
    color: var(--color-white);
}

.page-banner-content .breadcrumb a:hover {
    color: var(--color-primary-light);
}

/* ==================== Subpage Layout ==================== */
.subpage-content {
    padding: 60px 0;
}

.content-with-sidebar {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
}

/* Sidebar */
.sidebar {
    position: sticky;
    top: calc(var(--header-height) + var(--header-top-height) + 20px);
    align-self: start;
}

.sidebar-title {
    font-size: 20px;
    font-weight: 700;
    padding: 16px 20px;
    background: var(--color-dark);
    color: var(--color-white);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.sidebar-menu {
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    overflow: hidden;
}

.sidebar-menu li {
    border-bottom: 1px solid var(--color-border);
}

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

.sidebar-menu li a {
    display: block;
    padding: 14px 20px;
    font-size: 15px;
    transition: var(--transition);
}

.sidebar-menu li a:hover,
.sidebar-menu li a.active {
    background: rgba(191, 26, 32, 0.05);
    color: var(--color-primary);
    padding-left: 26px;
}

/* Main Content */
.main-content h2 {
    font-size: 24px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-border);
}

.main-content h3 {
    font-size: 20px;
    margin: 28px 0 16px;
}

.main-content p {
    color: var(--color-gray);
    line-height: 1.9;
}

.main-content img {
    border-radius: var(--radius-md);
    margin: 20px 0;
}

/* Product Detail */
.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.product-detail-img {
    border-radius: var(--radius-md);
    overflow: hidden;
}

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

.product-detail-info h2 {
    border-bottom: none;
    margin-bottom: 16px;
}

.product-features {
    margin-top: 20px;
}

.product-features li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    font-size: 15px;
    color: var(--color-gray);
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
}

/* News List */
.news-list-item {
    display: flex;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--color-border);
}

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

.news-list-img {
    width: 240px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.news-list-img img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.news-list-content h3 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 18px;
}

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

.news-list-content .news-meta {
    font-size: 14px;
    color: var(--color-gray-light);
    margin-bottom: 8px;
}

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

/* Cases Page */
.cases-page-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* Contact Page */
.contact-page-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-map {
    border-radius: var(--radius-md);
    overflow: hidden;
    height: 400px;
    background: var(--color-light);
}

.contact-map-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-light);
    color: var(--color-gray-light);
    font-size: 16px;
}

/* ==================== Animations ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== Responsive ==================== */

/* Large Desktop */
@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }
    
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
        gap: 24px;
    }
}

/* Desktop */
@media (max-width: 992px) {
    :root {
        --header-height: 70px;
    }
    
    .hero {
        height: 450px;
    }
    
    .slide-content h2 {
        font-size: 32px;
    }
    
    .slide-content p {
        font-size: 16px;
    }
    
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        max-height: 400px;
    }
    
    .about-image img {
        min-height: auto;
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-page-grid,
    .content-with-sidebar,
    .product-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
    
    .cases-page-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablet */
@media (max-width: 768px) {
    :root {
        --header-top-height: 0;
    }
    
    .header-top {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        padding: 80px 24px 40px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
        z-index: 1000;
        overflow-y: auto;
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-list > li > a {
        padding: 14px 0;
        border-bottom: 1px solid var(--color-border);
        font-size: 16px;
    }
    
    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        padding: 0 0 0 16px;
        display: none;
    }
    
    .dropdown.open .dropdown-menu {
        display: block;
    }
    
    .hero {
        height: 350px;
        margin-top: var(--header-height);
    }
    
    .slide-content h2 {
        font-size: 26px;
    }
    
    .slide-content p {
        font-size: 14px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-title {
        font-size: 26px;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .product-info h3 {
        font-size: 14px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 24px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .news-list-item {
        flex-direction: column;
    }
    
    .news-list-img {
        width: 100%;
    }
    
    .news-list-img img {
        height: 200px;
    }
    
    .cases-page-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

/* Mobile */
@media (max-width: 576px) {
    .hero {
        height: 280px;
    }
    
    .slide-content h2 {
        font-size: 22px;
        margin-bottom: 10px;
    }
    
    .slide-content p {
        font-size: 14px;
        margin-bottom: 18px;
    }
    
    .slide-content .btn {
        font-size: 14px;
        padding: 10px 24px;
    }
    
    .section-title {
        font-size: 22px;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .product-info {
        padding: 10px;
    }
    
    .product-info h3 {
        font-size: 14px;
    }
    
    .case-tabs {
        gap: 8px;
    }
    
    .case-tab {
        padding: 8px 18px;
        font-size: 14px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .partner-item {
        padding: 16px;
        font-size: 14px;
        min-height: 60px;
    }
    
    .contact-info-card {
        padding: 20px;
    }
    
    .page-banner {
        height: 200px;
    }
    
    .page-banner-content h1 {
        font-size: 24px;
    }
    
    .cases-page-grid {
        grid-template-columns: 1fr;
    }
    
    .news-card {
        flex-direction: column;
        gap: 12px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 38px;
        height: 38px;
    }
}

/* Mobile Small */
@media (max-width: 375px) {
    .hero {
        height: 240px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .case-tabs {
        flex-direction: column;
        align-items: center;
    }
}