/* 基础样式 */
:root {
    --primary-color: #B71C1C;
    --secondary-color: #6c757d;
    --dark-color: #333;
    --light-color: #f8f9fa;
    --white: #fff;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
}

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

/* 轮播图样式 */
.slider-container {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
    margin-top: 80px;
}

.slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.slide.active {
    opacity: 1;
}

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

.slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 2;
    width: 100%;
    max-width: 800px;
    padding: 0 20px;
}

.slide-content h2 {
    font-size: 3em;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transform: translateY(20px);
}

.slide-content p {
    font-size: 1.5em;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transform: translateY(20px);
}

.slider-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.3);
    border: none;
    color: white;
    font-size: 24px;
    padding: 15px;
    cursor: pointer;
    transition: background 0.3s;
    z-index: 3;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-button:hover {
    background: rgba(255, 255, 255, 0.5);
}

.prev {
    left: 20px;
}

.next {
    right: 20px;
}

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

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

.dot.active {
    background: white;
}

/* 服务卡片样式 */
.services-section {
    padding: 30px 0 40px;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 10px;
    position: relative;
    margin-top: -10px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 25px;
    padding: 0 20px;
    max-width: 1200px;
    margin: 0 auto;
    margin-top: 15px;
    box-sizing: border-box;
}

.service-card {
    background: white;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    height: calc(100% - 3px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid #eee;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
    min-width: 0;
    width: 100%;
}

.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: #B71C1C;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.service-card:hover::after {
    transform: scaleX(1);
}

.service-card i {
    font-size: 2.2em;
    color: #B71C1C;
    margin-bottom: 12px;
    transition: transform 0.3s ease;
}

.service-card:hover i {
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 1.2em;
    margin-bottom: 8px;
    color: #333;
}

.service-card p {
    color: #666;
    line-height: 1.4;
    margin: 0;
    font-size: 0.9em;
}

/* 导航菜单样式 */
.nav-item-wrapper {
    position: relative;
    display: inline-block;
}

.nav-item {
    color: #333;
    text-decoration: none;
    font-size: 16px;
    padding: 0 15px;
    position: relative;
    transition: all 0.3s ease;
}

.nav-item:hover {
    color: #B71C1C;
}

.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    min-width: 200px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1000;
    border-radius: 4px;
}

.nav-item-wrapper:hover .submenu {
    display: block;
}

.submenu a {
    display: block;
    padding: 10px 15px;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
}

.submenu a:hover {
    background-color: #B71C1C;
    color: #fff;
}

/* 数据统计样式 */
.statistics {
    padding: 35px 0;
    background: linear-gradient(135deg, #B71C1C 0%, #D32F2F 100%);
    color: white;
    position: relative;
    margin-top: -15px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    height: calc(100% - 3px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    box-sizing: border-box;
    min-width: 0;
    width: 100%;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 15px;
    padding: 2px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.05) 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-item:hover::after {
    transform: scaleX(1);
}

.stat-item .number {
    font-size: 32px;
    font-weight: bold;
    margin: 0;
    opacity: 0;
    transform: translateY(20px);
    line-height: 1;
    padding-bottom: 8px;
}

.stat-item .number.animate {
    animation: countUp 2s ease forwards, fadeInUp 1s ease forwards;
}

.stat-item .number::after {
    content: '+';
    font-size: 0.6em;
    vertical-align: super;
    margin-left: 2px;
}

.stat-item .label {
    font-size: 14px;
    opacity: 0;
    transform: translateY(20px);
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
}

.stat-item .label.animate {
    animation: fadeInUp 1s ease forwards 0.5s;
}

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

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

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 打字机效果 */
@keyframes typing {
    from { width: 0 }
    to { width: 100% }
}

@keyframes blink {
    50% { border-color: transparent }
}

/* 轮播图文字动画 */
.typing-text {
    display: inline-block;
    overflow: hidden;
    white-space: nowrap;
    opacity: 0;
}

.typing-text.delayed {
    animation-delay: 0.5s;
}

.slide.active .typing-text {
    animation: typing 3.5s steps(40, end) forwards, blink .75s step-end infinite;
    opacity: 1;
}

.slide.active .slide-content h2,
.slide.active .slide-content p {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .services-grid,
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-card,
    .stat-item {
        height: auto;
    }
}

@media (max-width: 768px) {
    .services-grid,
    .stats-grid {
        grid-template-columns: 1fr;
        padding: 0 15px;
    }
    
    .service-card,
    .stat-item {
        max-width: 100%;
    }
    
    .service-card i {
        font-size: 36px;
    }
    
    .service-card h3 {
        font-size: 20px;
    }
    
    .stat-item .number {
        font-size: 36px;
    }
    
    .stat-item .label {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        gap: 15px;
    }
    
    .slider-container {
        height: 300px;
    }
    
    .slide-content h2 {
        font-size: 2.2em;
    }
    
    .slide-content p {
        font-size: 1.2em;
    }
}

/* 按钮样式 */
.button {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s, transform 0.3s;
}

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

.button.secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 头部样式 */
.site-header {
    background-color: #fff;
    box-shadow: none;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.header-left {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 10px;
}

.logo-img {
    height: 45px;
    width: auto;
}

.company-name {
    font-size: 20px;
    color: #333;
    font-weight: normal;
    text-decoration: none;
}

.main-nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

/* 首页英雄区域 */
.hero {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('/images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--white);
    margin-top: 80px;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3em;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.5em;
    margin-bottom: 30px;
}

/* 服务预览区域 */
.services-preview {
    padding: 80px 0;
    background-color: var(--light-gray);
}

/* 关于我们预览 */
.about-preview {
    padding: 80px 0;
}

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

.about-image img {
    width: 100%;
    border-radius: 10px;
}

/* 案例预览 */
.cases-preview {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.cases-container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.cases-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.tab-btn {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 10px 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 30px;
}

.tab-btn:hover {
    background-color: rgba(183, 28, 28, 0.1);
    transform: translateY(-3px);
}

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

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 20px;
}

.case-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    border: 1px solid #eee;
    height: 100%;
    display: flex;
    flex-direction: column;
    transform: translateY(0);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.case-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid #eee;
}

.case-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.case-content h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 10px;
}

.case-content h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.case-card:hover .case-content h3:after {
    width: 80px;
}

.case-details {
    margin-top: 10px;
}

.case-details p {
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 1.6;
}

.case-details strong {
    color: var(--dark-color);
    font-weight: 600;
}

/* 联系我们预览 */
.contact-preview {
    padding: 80px 0;
    background: linear-gradient(rgba(0,0,0,0.8), rgba(0,0,0,0.8)), url('/images/contact-bg.jpg');
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
}

/* 页脚 */
.site-footer {
    background-color: #333;
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

.footer-info {
    max-width: 800px;
    margin: 0 auto;
}

.footer-contact {
    margin-bottom: 20px;
}

.footer-contact p {
    margin: 8px 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
}

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

.footer-copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 15px;
}

.footer-copyright p {
    margin: 5px 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.beian-info {
    margin-top: 8px;
}

.beian-info a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.beian-info a:hover {
    color: var(--primary-color);
}

/* 动画效果 */
.scroll-fade {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.scroll-fade.scrolled {
    opacity: 1;
    transform: translateY(0);
}

/* 内页样式 */
.page-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 100px 0 40px;
    margin-bottom: 40px;
}

.page-header h1 {
    margin: 0;
    text-align: center;
}

.content-section {
    padding: 40px 0;
}

/* 表单样式 */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
    box-sizing: border-box;
    width: 100%;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.form-group textarea {
    height: 150px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #b71c1c;
    box-shadow: 0 0 0 2px rgba(183, 28, 28, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #999;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: #b71c1c;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 43px;
}

.submit-btn:hover {
    background: #e53935;
}

.business-consultation {
    background: #b71c1c;
    color: white;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    margin-top: 40px;
}

.business-title {
    font-size: 28px;
    margin-bottom: 15px;
    display: inline-block;
    position: relative;
    cursor: pointer;
    transform-origin: center;
    transition: transform 0.3s ease;
}

.business-title:hover {
    transform: scale(1.2);
}

.business-consultation p {
    font-size: 16px;
    opacity: 0.9;
    margin-top: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-container {
        margin: 60px auto 40px;
    }

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

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

@media (max-width: 480px) {
    .contact-info {
        grid-template-columns: 1fr;
    }
}

/* 联系我们页面样式 */
.contact-container {
    max-width: 1200px;
    margin: 100px auto 60px;
    padding: 0 20px;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-left {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.office-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

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

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding: 30px;
    flex-grow: 1;
}

.info-item {
    padding: 20px;
    text-align: center;
    border-radius: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 140px;
}

.info-item:hover {
    background: #b71c1c;
    transform: translateY(-5px);
}

.info-item:hover i,
.info-item:hover h3,
.info-item:hover p {
    color: white;
}

.info-item i {
    font-size: 24px;
    color: #333;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

.info-item h3 {
    font-size: 16px;
    color: #333;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.info-item p {
    color: #333;
    font-size: 14px;
    line-height: 1.5;
    transition: color 0.3s ease;
    margin: 0;
}

.contact-right {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    box-sizing: border-box;
}

.form-title {
    font-size: 24px;
    color: #333;
    margin-bottom: 25px;
    text-align: center;
}

.form-group textarea {
    height: 180px;
    resize: none;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #b71c1c;
    box-shadow: 0 0 0 2px rgba(183, 28, 28, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #999;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: #b71c1c;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 43px;
}

.submit-btn:hover {
    background: #e53935;
}

.business-consultation {
    background: #b71c1c;
    color: white;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    margin-top: 40px;
}

.business-title {
    font-size: 28px;
    margin-bottom: 15px;
    display: inline-block;
    position: relative;
    cursor: pointer;
    transform-origin: center;
    transition: transform 0.3s ease;
}

.business-title:hover {
    transform: scale(1.2);
}

.business-consultation p {
    font-size: 16px;
    opacity: 0.9;
    margin-top: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-container {
        margin: 60px auto 40px;
    }

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

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

@media (max-width: 480px) {
    .contact-info {
        grid-template-columns: 1fr;
    }
}

/* 成功案例页面样式 */
.cases-banner {
    background: linear-gradient(135deg, #b71c1c 0%, #d32f2f 100%);
    padding: 20px 0 10px;
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

.cases-banner h1 {
    font-size: 32px;
    margin-bottom: 5px;
}

.cases-banner p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 12px;
}

.cases-banner .stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px 5px;
}

.cases-banner .stat-item {
    background: white;
    padding: 8px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
}

.cases-banner .stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 12px rgba(0, 0, 0, 0.15);
}

.cases-banner .number {
    font-size: 24px;
    font-weight: bold;
    margin: 0;
    opacity: 0;
    line-height: 1;
    padding-bottom: 2px;
    color: #b71c1c;
}

.cases-banner .number.animate {
    animation: countUp 2s ease forwards, fadeInUp 1s ease forwards;
}

.cases-banner .number::after {
    content: '+';
    font-size: 0.6em;
    vertical-align: super;
    margin-left: 2px;
}

.cases-banner .label {
    font-size: 12px;
    opacity: 0;
    margin: 0;
    color: #333;
}

.cases-banner .label.animate {
    animation: fadeInUp 1s ease forwards 0.5s;
}

@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .cases-banner .stats-grid {
        grid-template-columns: repeat(1, 1fr);
        max-width: 300px;
    }
    
    .cases-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
        margin-bottom: 10px;
    }
}

@media (max-width: 640px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-banner {
        padding: 40px 20px;
    }
    
    .cases-banner h1 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .cases-banner {
        padding: 40px 15px 30px;
    }
    
    .cases-banner h1 {
        font-size: 28px;
    }
}