/* 基本样式和重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f8f8;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: #333;
}

ul {
    list-style: none;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: #4CAF50;
    color: #fff;
}

.btn-primary:hover {
    background-color: #388E3C;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.section {
    padding: 100px 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

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

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: #333;
}

.underline {
    height: 4px;
    width: 60px;
    background-color: #4CAF50;
    margin: 0 auto;
}

/* 导航栏样式 */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

#navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #4CAF50;
}

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    font-weight: 600;
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #4CAF50;
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* 首页部分样式 */
#home {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('images/hero.jpg') no-repeat center center/cover;
    color: #fff;
    text-align: center;
    position: relative;
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    padding: 2rem;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

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

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

.hero-title {
    font-size: 4rem;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.3s;
    animation-fill-mode: both;
}

.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-down i {
    font-size: 2rem;
    color: #fff;
}

/* 关于我们部分样式 */
.about-content {
    display: flex;
    align-items: center;
    gap: 4rem;
    padding: 2rem 0;
}

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

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.about-image img:hover {
    transform: scale(1.02);
}

.about-text {
    flex: 1;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .about-content {
        flex-direction: column;
        gap: 2rem;
    }

    .about-image {
        width: 100%;
        max-width: 500px;
        margin: 0 auto;
    }

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

    .about-text ul {
        display: inline-block;
        text-align: left;
    }
}
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image {
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-image img {
    transition: transform 0.5s ease;
}

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

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: #4CAF50;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.about-text ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.about-text ul li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 25px;
}

.about-text ul li::before {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: #4CAF50;
    position: absolute;
    left: 0;
}

/* 联系我们部分样式 */
#contact {
    background-color: #f1f1f1;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

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

.contact-item i {
    font-size: 2rem;
    color: #4CAF50;
    margin-right: 20px;
    width: 50px;
    height: 50px;
    background-color: #e9f5e9;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.contact-item h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
}

.contact-form h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #4CAF50;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 10px rgba(76, 175, 80, 0.1);
}

.form-group textarea {
    height: 150px;
    resize: none;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.footer-logo h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: #4CAF50;
}

.footer-links h3,
.footer-social h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h3::after,
.footer-social h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: #4CAF50;
}

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

.footer-links ul li a {
    color: #ccc;
    transition: color 0.3s ease;
}

.footer-links ul li a:hover {
    color: #4CAF50;
}

.social-icons {
    display: flex;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background-color: #444;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 10px;
    transition: all 0.3s ease;
}

.social-icons a i {
    color: #fff;
    font-size: 1.2rem;
}

.social-icons a:hover {
    background-color: #4CAF50;
    transform: translateY(-5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
}

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

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-20px) translateX(-50%);
    }
    60% {
        transform: translateY(-10px) translateX(-50%);
    }
}

/* 返回顶部按钮 */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: #4CAF50;
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    z-index: 999;
}

.scroll-top-btn:hover {
    background-color: #388E3C;
    transform: translateY(-5px);
}

/* 添加淡入效果 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 导航栏滚动效果 */
#navbar.scrolled {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media screen and (max-width: 992px) {
    .about-content,
    .contact-content,
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .about-image {
        margin-bottom: 30px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
}

@media screen and (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: #fff;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: all 0.5s ease;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links li {
        margin: 20px 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
    
    .section {
        padding: 80px 0;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
}

@media screen and (max-width: 576px) {
    .section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .about-text h3,
    .contact-form h3 {
        font-size: 1.5rem;
    }
}