/* 全局变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --primary: #1a936f;
    --primary-dark: #106a52;
    --secondary: #88d498;
    --accent: #114b5f;
    --light: #f3e9d2;
    --dark: #1d1e2c;
    --gray: #6c757d;
    --light-gray: #f8f9fa;
    --transition: all 0.3s ease;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.2);
}
html {
    scroll-behavior: smooth;
}
body {
    line-height: 1.6;
    color: var(--dark);
    background-color: #ffffff;
    overflow-x: hidden;
}
ul {
    list-style: none;
}
a {
    text-decoration: none;
}
img {
    max-width: 100%;
    display: block;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.breadcrumb {
    padding: 15px 20px;
    font-size: 14px;
    color: var(--gray);
}
.breadcrumb a {
    color: var(--primary);
}

/* 导航栏 */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}
.navbar.scrolled {
    padding: 10px 0;
    background-color: rgba(255, 255, 255, 0.98);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-links {
    display: flex;
}
.nav-links li {
    margin-left: 30px;
}
.nav-links a {
    color: var(--dark);
    font-weight: 500;
    font-size: 1.1rem;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}
.nav-links a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}
.nav-links a:hover:after,
.nav-links a.active:after {
    width: 100%;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}
.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--dark);
    cursor: pointer;
}
.mobile-menu {
    display: none;
    width: 100%;
    background: #fff;
    padding: 20px;
    border-top: 1px solid #eee;
}
.mobile-menu li {
    margin: 12px 0;
}
.mobile-menu a {
    font-size: 16px;
    color: var(--dark);
    padding: 8px 0;
    display: block;
}
.mobile-menu a.active {
    color: var(--primary);
}

/* 首页横幅 */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    color: white;
    text-align: center;
    padding-top: 70px;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26, 147, 111, 0.9) 0%, rgba(17, 75, 95, 0.9) 100%);
    background-size: cover;
    background-position: center;
    z-index: -1;
}
.hero-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}
.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    animation: fadeInDown 1s ease;
}
.hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    animation: fadeInUp 1s ease 0.3s both;
}
.btn {
    display: inline-block;
    background-color: var(--accent);
    color: white;
    padding: 12px 35px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 1.1rem;
    transition: var(--transition);
    border: 2px solid var(--accent);
    animation: fadeIn 1s ease 0.6s both;
}
.btn:hover {
    background-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}
.btn-light {
    background-color: transparent;
    border: 2px solid white;
    margin-left: 15px;
}
.btn-light:hover {
    background-color: white;
    color: var(--accent);
}
.btn-container {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* 通用区块 */
.section {
    padding: 100px 0;
}
.section-title {
    text-align: center;
    margin-bottom: 60px;
}
.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-dark);
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}
.section-title h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--secondary);
    border-radius: 2px;
}

/* 关于我们 */
.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}
.about-text {
    flex: 1;
}
.about-text h3 {
    font-size: 1.8rem;
    color: var(--accent);
    margin-bottom: 20px;
}
.about-text p {
    margin-bottom: 20px;
    color: var(--gray);
}
.about-image {
    flex: 1;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    transition: var(--transition);
}
.about-image:hover {
    transform: translateY(-10px);
}

/* 服务板块 */
.services {
    background-color: var(--light-gray);
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.service-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    padding: 40px 25px;
}
.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}
.service-icon {
    font-size: 3.5rem;
    color: var(--primary);
    margin-bottom: 25px;
}
.service-card h3 {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 15px;
}
.service-card p {
    color: var(--gray);
}

/* 核心优势 */
.advantages {
    background: linear-gradient(to right, var(--primary-dark), var(--accent));
    color: white;
}
.advantages .section-title h2 {
    color: white;
}
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}
.advantage-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}
.advantage-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
}
.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--light);
}
.advantage-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}
.contact-info {
    display: flex;
    flex-direction: column;
}
.contact-item {
    display: flex;
    margin-bottom: 25px;
    align-items: flex-start;
}
.contact-icon {
    font-size: 1.5rem;
    color: var(--primary);
    margin-right: 15px;
    min-width: 30px;
}
.contact-text h4 {
    font-size: 1.3rem;
    margin-bottom: 5px;
    color: var(--accent);
}
.contact-map img {
    width: 100%;
    border-radius: 8px;
}

/* 页脚 */
.footer {
    background-color: var(--dark);
    color: white;
    padding: 70px 0 20px;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}
.footer-col h4 {
    font-size: 1.4rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--primary);
}
.footer-col p {
    margin-bottom: 20px;
    color: #aaa;
}
.footer-links li {
    margin-bottom: 12px;
}
.footer-links a {
    color: #aaa;
    transition: var(--transition);
}
.footer-links a:hover {
    color: white;
    padding-left: 5px;
}
.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}
.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}
.social-links a:hover {
    background-color: var(--primary);
    transform: translateY(-3px);
}
.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
    font-size: 0.9rem;
}
.copyright a {
    color: #fff;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@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); }
}

/* 响应式适配 全分辨率 */
@media (max-width: 992px) {
    .hero h1 { font-size: 2.8rem; }
    .hero p { font-size: 1.3rem; }
    .about-content { flex-direction: column; }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .menu-toggle { display: block; }
    .hero h1 { font-size: 2.3rem; }
    .hero p { font-size: 1.1rem; }
    .section { padding: 70px 0; }
    .section-title h2 { font-size: 2rem; }
    .btn-container { flex-direction: column; gap:15px; }
    .btn { width:100%; margin:0; text-align:center; }
    .btn-light { margin-left: 0; }
}
@media (max-width: 480px) {
    .hero h1 { font-size: 2rem; }
}