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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    scroll-behavior: smooth;
    background-color: #f8f9fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
}

/* 通用样式 */
h2 {
    font-size: 42px;
    margin-bottom: 40px;
    color: #2c3e50;
    text-align: center;
    font-weight: 700;
    position: relative;
    padding-bottom: 20px;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
    border-radius: 2px;
}

h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #2c3e50;
    font-weight: 600;
}

p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: #555;
}

.btn {
    display: inline-block;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
    color: #fff;
    padding: 14px 32px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3);
    border: none;
    cursor: pointer;
    font-size: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn:hover {
    background: linear-gradient(90deg, #27ae60, #2ecc71);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4);
}

/* 导航栏 */
header {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 6px 30px rgba(0,0,0,0.15);
}

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

.company-name {
    font-size: 16px;
    font-weight: 600;
    color: #2c3e50;
    margin-right: 15px;
    white-space: nowrap;
}

.logo img {
    max-height: 50px;
    max-width: 100%;
    height: auto;
    width: auto;
    transition: all 0.4s ease;
}

header.scrolled .logo img {
    max-height: 45px;
}

header.scrolled .company-name {
    font-size: 14px;
    margin-right: 10px;
}

nav {
    float: right;
}

nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    height: 70px;
    transition: all 0.4s ease;
}

header.scrolled nav ul {
    height: 60px;
}

nav ul li {
    display: inline-block;
    margin-left: 15px;
    position: relative;
}

nav ul li:first-child {
    margin-left: 0;
}

nav ul li a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 600;
    transition: all 0.4s ease;
    padding: 10px 20px;
    border-radius: 20px;
    position: relative;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    overflow: hidden;
    display: inline-block;
    white-space: nowrap;
    min-width: 80px;
    text-align: center;
}

nav ul li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(46, 204, 113, 0.1), transparent);
    transition: all 0.6s ease;
}

nav ul li a:hover::before {
    left: 100%;
}

nav ul li a:hover {
    color: #2ecc71;
    background-color: rgba(46, 204, 113, 0.1);
    transform: translateY(-2px);
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: 0;
    left: 50%;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
    transition: all 0.4s ease;
    transform: translateX(-50%);
}

nav ul li a:hover::after {
    width: 80%;
}

nav ul li a.active {
    color: #2ecc71;
    background-color: rgba(46, 204, 113, 0.1);
}

nav ul li a.active::after {
    width: 80%;
}

/* 横幅 */
.banner {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('../images/banner/banner.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: #fff;
    text-align: center;
    padding: 180px 0;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.2), rgba(39, 174, 96, 0.2));
    z-index: 1;
}

.banner::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to top, #fff, transparent);
    z-index: 2;
}

.banner .container {
    position: relative;
    z-index: 3;
}

.banner h2 {
    font-size: 64px;
    margin-bottom: 30px;
    color: #fff;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    text-shadow: 0 4px 15px rgba(0,0,0,0.7);
    animation: fadeInUp 1s ease-out;
}

.banner h2::after {
    background: linear-gradient(90deg, #2ecc71, #fff);
    width: 150px;
}

.banner p {
    font-size: 28px;
    margin-bottom: 50px;
    color: rgba(255,255,255,0.95);
    font-weight: 400;
    text-shadow: 0 2px 8px rgba(0,0,0,0.5);
    animation: fadeInUp 1s ease-out 0.3s both;
}

.banner .btn {
    font-size: 20px;
    padding: 18px 45px;
    border-radius: 50px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
    box-shadow: 0 8px 25px rgba(46, 204, 113, 0.5);
    transition: all 0.4s ease;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.banner .btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 30px rgba(46, 204, 113, 0.6);
}

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

/* 关于我们 */
.about {
    padding: 140px 0;
    background: #fff;
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(135deg, #f8f9fa, #fff);
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 60px;
}

.about-text {
    flex: 1;
    min-width: 300px;
    padding: 50px;
    background: #f8f9fa;
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.08);
    position: relative;
    z-index: 1;
    transition: all 0.4s ease;
}

.about-text:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.12);
}

.about-text::before {
    content: '';
    position: absolute;
    top: -15px;
    left: -15px;
    right: 15px;
    bottom: 15px;
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    border-radius: 20px;
    z-index: -1;
    opacity: 0.1;
    transition: all 0.4s ease;
}

.about-text:hover::before {
    top: -10px;
    left: -10px;
    right: 10px;
    bottom: 10px;
    opacity: 0.15;
}

.about-text h3 {
    font-size: 32px;
    margin-bottom: 25px;
    color: #2c3e50;
    font-weight: 700;
    position: relative;
    padding-left: 25px;
}

.about-text h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 4px;
    height: 60%;
    background: linear-gradient(180deg, #2ecc71, #27ae60);
    border-radius: 2px;
}

.about-text p {
    margin-bottom: 25px;
    line-height: 1.8;
    color: #555;
    font-size: 16px;
}

.about-image {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: 20px;
    bottom: 20px;
    border: 2px solid #2ecc71;
    border-radius: 20px;
    z-index: -1;
    transition: all 0.4s ease;
}

.about-image:hover::before {
    top: -10px;
    left: -10px;
    right: 10px;
    bottom: 10px;
}

.about-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    transition: all 0.4s ease;
}

.about-image img:hover {
    transform: scale(1.03);
    box-shadow: 0 25px 50px rgba(0,0,0,0.2);
}

/* 产品中心 */
.products {
    padding: 120px 0;
    background: #f8f9fa;
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(135deg, #fff, #f8f9fa);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 40px;
}

.product-item {
    background: #fff;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-item h3 {
    margin-bottom: 12px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 18px;
}

.product-item p {
    color: #555;
    line-height: 1.6;
    font-size: 13px;
    flex-grow: 1;
}

.product-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
}

.product-item:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.product-image {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    margin-bottom: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(0,0,0,0.1);
    min-height: 220px;
}

.product-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.product-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: all 0.3s ease;
}

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

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.product-image:hover .product-overlay {
    opacity: 1;
}

.product-overlay span {
    color: #fff;
    font-weight: 600;
    font-size: 16px;
    padding: 10px 20px;
    border: 2px solid #2ecc71;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.product-overlay span:hover {
    background: #2ecc71;
    transform: scale(1.1);
}

.product-item h3 {
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 20px;
}

.product-item p {
    color: #555;
    line-height: 1.6;
    font-size: 14px;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.9);
}

.modal-content {
    position: relative;
    background-color: #fefefe;
    margin: 10% auto;
    padding: 30px;
    border: 1px solid #888;
    width: 80%;
    max-width: 800px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.close {
    position: absolute;
    top: 15px;
    right: 20px;
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

#modal-body {
    padding: 20px 0;
}

#modal-body img,
#case-modal-body img {
    width: 100%;
    max-width: 100%;
    max-height: 500px;
    object-fit: contain;
    border-radius: 10px;
    margin-bottom: 20px;
}

#modal-body h3 {
    color: #2c3e50;
    font-size: 24px;
    margin-bottom: 15px;
}

#modal-body p {
    color: #555;
    line-height: 1.6;
    margin-bottom: 20px;
}

/* 联系我们 */
.contact {
    padding: 120px 0;
    background: #f8f9fa;
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(135deg, #fff, #f8f9fa);
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
    padding: 35px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
}

.contact-info::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
}

.contact-info h3 {
    margin-bottom: 30px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 24px;
}

.contact-info p {
    margin-bottom: 20px;
    color: #555;
    line-height: 1.8;
    font-size: 16px;
}

.contact-info p strong {
    color: #2c3e50;
    font-weight: 600;
}

.contact-map {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.contact-map img {
    width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: contain;
    border-radius: 15px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.contact-map img:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

/* 案例展示 */
.cases {
    padding: 120px 0;
    background: #f8f9fa;
    position: relative;
}

.cases::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(135deg, #fff, #f8f9fa);
}

.cases h2 {
    color: #2c3e50;
    margin-bottom: 20px;
}

.cases-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
    color: #555;
    font-size: 16px;
    line-height: 1.6;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-item {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.case-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.case-image {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(0,0,0,0.1);
    min-height: 200px;
}

.case-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: all 0.3s ease;
}

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

.case-content {
    padding: 25px;
    flex-grow: 1;
}

.case-content h3 {
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 18px;
}

.case-content p {
    color: #555;
    line-height: 1.6;
    font-size: 14px;
}

/* 在线留言 */
.message {
    padding: 120px 0;
    background: #f8f9fa;
    position: relative;
}

.message::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(135deg, #fff, #f8f9fa);
}

.message-form {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
}

.message-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
}

.form-row {
    display: flex;
    gap: 30px;
    margin-bottom: 25px;
}

.form-row input {
    flex: 1;
    padding: 16px 20px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-row input:focus {
    outline: none;
    border-color: #2ecc71;
    background: #fff;
    box-shadow: 0 0 0 5px rgba(46, 204, 113, 0.1);
}

.message-form textarea {
    width: 100%;
    padding: 16px 20px;
    margin-bottom: 30px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 16px;
    height: 180px;
    resize: none;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.message-form textarea:focus {
    outline: none;
    border-color: #2ecc71;
    background: #fff;
    box-shadow: 0 0 0 5px rgba(46, 204, 113, 0.1);
}

/* 行业动态 */
.news {
    padding: 120px 0;
    background: #fff;
    position: relative;
}

.news::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(135deg, #f8f9fa, #fff);
}

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

.news-item {
    background: #fff;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.news-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
}

.news-date {
    color: #2ecc71;
    font-weight: 600;
    margin-bottom: 15px;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.news-item h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 20px;
    transition: all 0.3s ease;
}

.news-item:hover h3 {
    color: #2ecc71;
}

.news-item p {
    margin-bottom: 25px;
    color: #555;
    line-height: 1.6;
    font-size: 14px;
    flex-grow: 1;
}

.read-more {
    display: inline-block;
    color: #2ecc71;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    padding-bottom: 5px;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.read-more::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
    transition: width 0.3s ease;
}

.read-more:hover {
    color: #27ae60;
}

.read-more:hover::after {
    width: 100%;
}

.news-item:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* 页脚 */
footer {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: #fff;
    padding: 80px 0 40px;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 50px;
}

.footer-info {
    flex: 1;
    min-width: 300px;
    margin-right: 50px;
}

.footer-info h3 {
    margin-bottom: 25px;
    color: #2ecc71;
    font-size: 24px;
    font-weight: 600;
}

.footer-info p {
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
    font-size: 14px;
}

.footer-links {
    flex: 1;
    min-width: 300px;
}

.footer-links h4 {
    margin-bottom: 25px;
    color: #2ecc71;
    font-size: 18px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links ul {
    list-style: none;
}

.footer-links ul li {
    margin-bottom: 15px;
}

.footer-links ul li a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 14px;
    position: relative;
    padding-left: 20px;
}

.footer-links ul li a::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #2ecc71;
    transition: all 0.3s ease;
}

.footer-links ul li a:hover {
    color: #2ecc71;
    padding-left: 25px;
}

.footer-links-grid {
    display: flex;
    gap: 50px;
}

.footer-links-grid ul {
    flex: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
    font-size: 14px;
    line-height: 1.6;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #2ecc71;
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    -webkit-transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    z-index: 999;
    border: none;
    -webkit-box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.back-to-top:hover {
    background: #27ae60;
    transform: translateY(-5px);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    /* 导航栏 */
    .logo {
        float: none;
        text-align: center;
        margin-bottom: 20px;
        flex-direction: column;
    }
    
    .company-name {
        font-size: 14px;
        margin-right: 0;
        margin-bottom: 10px;
    }
    
    nav {
        float: none;
        text-align: center;
    }
    
    nav ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 10px;
    }
    
    nav ul li a {
        padding: 16px 16px;
        font-size: 12px;
        min-width: 100px;
        min-height: 48px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(0,0,0,0.1);
        display: inline-block;
        text-align: center;
    }
    
    /* 横幅 */
    .banner h2 {
        font-size: 28px;
    }
    
    .banner p {
        font-size: 16px;
    }
    
    .banner .btn {
        font-size: 16px;
        padding: 14px 32px;
    }
    
    /* 通用布局 */
    .about-text,
    .about-image,
    .contact-info,
    .contact-map {
        flex: 100%;
        margin-right: 0;
        margin-bottom: 30px;
    }
    
    /* 网格布局 */
    .product-grid,
    .case-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    /* 案例展示 */
    .case-image img {
        height: 180px;
    }
    
    .case-content {
        padding: 20px;
    }
    
    /* 表单 */
    .form-row {
        flex-direction: column;
        gap: 15px;
    }
    
    .message-form {
        padding: 30px;
    }
    
    /* 页脚 */
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-info,
    .footer-links {
        flex: 100%;
        margin-right: 0;
    }
    
    .footer-links-grid {
        flex-direction: column;
        gap: 20px;
    }
    
    /* 模态框 */
    .modal-content {
        width: 95%;
        margin: 20% auto;
        padding: 20px;
    }
    
    /* 按钮 */
.btn {
    padding: 12px 24px;
    font-size: 14px;
    min-height: 48px;
    min-width: 120px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(0,0,0,0.1);
}
    
    /* 标题 */
    h2 {
        font-size: 32px;
        margin-bottom: 30px;
    }
    
    h3 {
        font-size: 20px;
    }
    
    /* 间距 */
    .container {
        padding: 15px 0;
    }
    
    .about,
    .products,
    .cases,
    .news,
    .contact,
    .message {
        padding: 80px 0;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    /* 网格布局 */
    .product-grid,
    .case-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 导航栏 */
    nav ul li a {
        padding: 10px 16px;
        font-size: 12px;
    }
    
    /* 横幅 */
    .banner h2 {
        font-size: 48px;
    }
    
    .banner p {
        font-size: 24px;
    }
}

@media (max-width: 992px) {
    /* 网格布局 */
    .product-grid,
    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}