/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif, Arial, sans-serif;
    line-height: 1.7;
    color: #333;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 25%, #bbf7d0 50%, #86efac 100%);
    position: relative;
    overflow-x: hidden;
}

/* 水波纹背景效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" opacity=".25" fill="%2322c55e"/><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" opacity=".5" fill="%2316a34a"/><path d="M0,0V5.63C149.93,59,314.09,71.78,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="%2315803d"/></svg>');
    background-size: cover;
    background-repeat: no-repeat;
    z-index: -1;
    pointer-events: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 头部样式 */
header {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 4px 20px rgba(22, 163, 74, 0.15);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

header h1 {
    color: #1a3a6c;
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 35px;
}

nav ul li a {
    text-decoration: none;
    color: #166534;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 10px 15px;
    border-radius: 8px;
    position: relative;
    font-size: 1.05rem;
}

nav ul li a:hover {
    color: #15803d;
    background-color: #bbf7d0;
}

nav ul li a.active {
    color: #fff;
    background-color: #16a34a;
    box-shadow: 0 4px 8px rgba(22, 163, 74, 0.3);
}

/* 主要内容区域 */
main {
    min-height: calc(100vh - 220px);
    padding-top: 20px;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #16a34a 0%, #22c55e 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
    border-radius: 0 0 20px 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    position: relative;
    overflow: hidden;
}

/* 统计数据区域 */
.stats {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.3) 0%, rgba(187, 247, 208, 0.3) 100%);
    margin-top: -30px;
    position: relative;
    z-index: 2;
    backdrop-filter: blur(5px);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.stat-item {
    background: #f8fafc;
    padding: 30px 20px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.4s ease;
}

.stat-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    background: #fff;
}

.stat-icon {
    margin: 0 auto 15px;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 700;
    color: #166534;
    margin-bottom: 8px;
}

.stat-text {
    font-size: 1.1rem;
    color: #666;
    font-weight: 500;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 20%, rgba(0,0,0,0.1) 100%);
    pointer-events: none;
}

.hero h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    animation: fadeInDown 1s ease;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 35px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease 0.2s both;
}

.btn {
    display: inline-block;
    background: linear-gradient(45deg, #16a34a, #22c55e);
    color: white;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 6px 15px rgba(22, 163, 74, 0.4);
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    animation: fadeIn 1s ease 0.4s both;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(22, 163, 74, 0.6);
    background: linear-gradient(45deg, #22c55e, #16a34a);
}

.btn:active {
    transform: translateY(1px);
}

/* 特点区域 */
.features {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.3) 0%, rgba(187, 247, 208, 0.3) 100%);
    position: relative;
    z-index: 1;
    backdrop-filter: blur(5px);
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 87c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%2322c55e' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    z-index: -1;
}

.features h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.4rem;
    color: #166534;
    font-weight: 700;
    position: relative;
}

.features h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #22c55e, #16a34a);
    margin: 15px auto 0;
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
    margin-top: 20px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.55);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(34, 197, 94, 0.15);
    transition: all 0.4s ease;
    border: 1px solid rgba(34, 197, 94, 0.1);
    backdrop-filter: blur(5px);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(34, 197, 94, 0.25);
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.feature-icon {
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 50%;
    margin-bottom: 20px;
}

.feature-card h3 {
    color: #166534;
    margin-bottom: 18px;
    font-size: 1.6rem;
    font-weight: 600;
}

.feature-card p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.7;
}

/* 产品区域 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.product-item {
    background: rgba(255, 255, 255, 0.5);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(34, 197, 94, 0.1);
    transition: all 0.4s ease;
    border-top: 4px solid #22c55e;
}

.product-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(34, 197, 94, 0.15);
    border-top: 4px solid #16a34a;
}

.product-icon {
    margin: 0 auto 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    background: rgba(34, 197, 94, 0.1);
    border-radius: 50%;
}

.product-item h3 {
    color: #166534;
    margin-bottom: 15px;
    font-size: 1.4rem;
    font-weight: 600;
}

.product-item p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* 合作伙伴区域 */
.clients {
    padding: 80px 0;
    background: linear-gradient(135deg, #e4edf5 0%, #f5f7fa 100%);
}

.clients h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.4rem;
    color: #1a3a6c;
    font-weight: 700;
}

.clients h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #3498db, #1a3a6c);
    margin: 15px auto 0;
    border-radius: 2px;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.client-item {
    background: #fff;
    padding: 25px 15px;
    border-radius: 10px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 500;
    color: #1a3a6c;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.client-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    background: #f8fafc;
}

/* 产品区域 */
.products {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.2) 0%, rgba(187, 247, 208, 0.2) 100%);
    backdrop-filter: blur(5px);
}

.products h2 {
    text-align: center;
    margin-bottom: 25px;
    font-size: 2.4rem;
    color: #1a3a6c;
    font-weight: 700;
}

.products h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #3498db, #1a3a6c);
    margin: 15px auto 0;
    border-radius: 2px;
}

.products p {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 1.2rem;
    color: #555;
    line-height: 1.7;
}

/* 关于我们页面 */
.about-intro,
.services-intro,
.contact-intro {
    padding: 60px 0 30px;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.2) 0%, rgba(187, 247, 208, 0.2) 100%);
    border-radius: 0 0 20px 20px;
    box-shadow: 0 5px 15px rgba(34, 197, 94, 0.05);
}

.about-intro h2,
.services-intro h2,
.contact-intro h2 {
    text-align: center;
    margin-bottom: 25px;
    font-size: 2.4rem;
    color: #166534;
    font-weight: 700;
}

.about-intro h2::after,
.services-intro h2::after,
.contact-intro h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #22c55e, #16a34a);
    margin: 15px auto 0;
    border-radius: 2px;
}

.about-intro p,
.services-intro p,
.contact-intro p {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.2rem;
    color: #555;
    line-height: 1.8;
    padding: 0 20px;
}

/* 公司信息 */
.company-info {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.25) 0%, rgba(187, 247, 208, 0.25) 100%);
    backdrop-filter: blur(5px);
}

.company-info h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.4rem;
    color: #166534;
    font-weight: 700;
}

.company-info h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #22c55e, #16a34a);
    margin: 15px auto 0;
    border-radius: 2px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.info-item {
    text-align: center;
    padding: 30px 20px;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.5);
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(34, 197, 94, 0.05);
}

.info-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(34, 197, 94, 0.1);
    background: rgba(255, 255, 255, 0.6);
}

.info-icon {
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 50%;
}

.info-item h3 {
    color: #1a3a6c;
    margin-bottom: 15px;
    font-size: 1.3rem;
    font-weight: 600;
}

.info-item p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* 服务卡片 */
.service-cards {
    padding: 60px 0;
    background: rgba(220, 252, 231, 0.5);
    backdrop-filter: blur(10px);
}

.service-cards .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 35px;
}

.service-icon {
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: rgba(34, 197, 94, 0.1);
    border-radius: 50%;
}

.service-card {
    background: rgba(255, 255, 255, 0.65);
    padding: 35px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(34, 197, 94, 0.15);
    transition: all 0.4s ease;
    border-top: 4px solid #22c55e;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(34, 197, 94, 0.25);
    border-top: 4px solid #16a34a;
}

.service-card h3 {
    color: #166534;
    margin-bottom: 18px;
    font-size: 1.6rem;
    font-weight: 600;
}

.service-card p {
    color: #666;
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.7;
}

.service-card ul {
    margin: 20px 0;
    padding-left: 20px;
}

.service-card ul li {
    padding: 6px 0;
    list-style: none;
    position: relative;
    color: #555;
    font-size: 1.05rem;
}

.service-card ul li::before {
    content: '✓';
    color: #27ae60;
    font-weight: bold;
    position: absolute;
    left: -20px;
}

.service-price {
    margin-top: 15px;
    padding: 8px 15px;
    background: #eef7ff;
    color: #3498db;
    border-radius: 20px;
    display: inline-block;
    font-weight: 600;
    font-size: 1rem;
}

.step-icon {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

/* 技术栈部分 */
.tech-stack {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
}

.tech-stack h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.4rem;
    color: #166534;
    font-weight: 700;
}

.tech-stack h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #22c55e, #16a34a);
    margin: 15px auto 0;
    border-radius: 2px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 35px;
}

.tech-item {
    text-align: center;
    padding: 30px 20px;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.5);
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(34, 197, 94, 0.05);
}

.tech-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(34, 197, 94, 0.15);
    background: rgba(255, 255, 255, 0.65);
}

.tech-icon {
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 50%;
}

.tech-item h3 {
    color: #1a3a6c;
    font-size: 1.4rem;
    font-weight: 600;
}

/* 开发流程 */
.process {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
}

.process h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.4rem;
    color: #166534;
    font-weight: 700;
}

.process h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #22c55e, #16a34a);
    margin: 15px auto 0;
    border-radius: 2px;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.step {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(34, 197, 94, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, #22c55e, #16a34a);
}

.step:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(34, 197, 94, 0.2);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
    border-radius: 50%;
    font-weight: bold;
    margin-bottom: 20px;
    font-size: 1.2rem;
    box-shadow: 0 5px 15px rgba(34, 197, 94, 0.3);
}

.step h4 {
    margin-bottom: 12px;
    color: #166534;
    font-size: 1.3rem;
    font-weight: 600;
}

.step p {
    color: #666;
    font-size: 1.05rem;
    line-height: 1.6;
}

/* 团队部分 */
.team {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.25) 0%, rgba(187, 247, 208, 0.25) 100%);
    backdrop-filter: blur(5px);
}

.team h2 {
    text-align: center;
    margin-bottom: 25px;
    font-size: 2.4rem;
    color: #1a3a6c;
    font-weight: 700;
}

.team h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #3498db, #1a3a6c);
    margin: 15px auto 0;
    border-radius: 2px;
}

.team p {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 1.2rem;
    color: #555;
    line-height: 1.7;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.team-member {
    background: rgba(255, 255, 255, 0.5);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(34, 197, 94, 0.1);
    transition: all 0.4s ease;
    border-top: 4px solid #22c55e;
}

.team-member:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(34, 197, 94, 0.15);
    border-top: 4px solid #16a34a;
}

.member-icon {
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 50%;
}

.team-member h3 {
    color: #166534;
    margin-bottom: 15px;
    font-size: 1.5rem;
    font-weight: 600;
}

.team-member p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* 发展历程 */
.history {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.25) 0%, rgba(187, 247, 208, 0.25) 100%);
    backdrop-filter: blur(5px);
}

.history h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.4rem;
    color: #166534;
    font-weight: 700;
}

.history h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #22c55e, #16a34a);
    margin: 15px auto 0;
    border-radius: 2px;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 4px;
    background: #3498db;
    left: 50%;
    margin-left: -2px;
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    padding: 20px 0;
    position: relative;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 50px;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 50px;
    text-align: left;
}

.timeline-icon {
    position: absolute;
    width: 50px;
    height: 50px;
    background: #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    top: 30px;
    z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-icon {
    right: -25px;
}

.timeline-item:nth-child(even) .timeline-icon {
    left: -25px;
}

.timeline-content {
    padding: 25px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(34, 197, 94, 0.1);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 30px;
    background: rgba(255, 255, 255, 0.4);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 30px;
    background: rgba(255, 255, 255, 0.4);
}

.timeline-content h3 {
    color: #1a3a6c;
    margin-bottom: 10px;
    font-size: 1.3rem;
    font-weight: 600;
}

.timeline-content p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* 联系信息 */
.contact-info {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.25) 0%, rgba(187, 247, 208, 0.25) 100%);
    backdrop-filter: blur(5px);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.contact-icon,
.form-icon {
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 50%;
}

.support {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(220, 252, 231, 0.25) 0%, rgba(187, 247, 208, 0.25) 100%);
    backdrop-filter: blur(5px);
}

.support h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.4rem;
    color: #166534;
    font-weight: 700;
}

.support h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #22c55e, #16a34a);
    margin: 15px auto 0;
    border-radius: 2px;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
}

.support-item {
    background: rgba(255, 255, 255, 0.5);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(34, 197, 94, 0.1);
    transition: all 0.4s ease;
    border-top: 4px solid #22c55e;
}

.support-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(34, 197, 94, 0.15);
    border-top: 4px solid #16a34a;
}

.support-icon {
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 50%;
}

.support-item h3 {
    color: #1a3a6c;
    margin-bottom: 15px;
    font-size: 1.5rem;
    font-weight: 600;
}

.support-item p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
}

.contact-card h3,
.contact-form h3 {
    margin-bottom: 25px;
    color: #1a3a6c;
    font-size: 1.6rem;
    font-weight: 600;
    position: relative;
    padding-bottom: 12px;
}

.contact-card h3::after,
.contact-form h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: #3498db;
    border-radius: 2px;
}

.contact-card p {
    margin-bottom: 15px;
    font-size: 1.1rem;
    color: #555;
    line-height: 1.7;
}

.contact-card a {
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.contact-card a:hover {
    color: #1a3a6c;
    text-decoration: underline;
}

/* 联系表单 */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #444;
    font-size: 1.05rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px;
    border: 2px solid #e1e8f0;
    border-radius: 10px;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    background: #f8fafc;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #22c55e;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
    background: #fff;
}

/* 页脚 */
footer {
    background: linear-gradient(135deg, #166534 0%, #22c55e 100%);
    color: #ecf0f1;
    padding: 50px 0 25px;
    margin-top: 60px;
    position: relative;
    z-index: 2;
}

footer .container {
    text-align: center;
}

footer p {
    margin-bottom: 12px;
    font-size: 1.05rem;
    line-height: 1.6;
}

footer a {
    color: #aed6f1;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

footer a:hover {
    color: #fff;
    text-decoration: underline;
}

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

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

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

/* 响应式设计 */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    nav ul {
        margin-top: 10px;
        justify-content: center;
        flex-wrap: wrap;
        gap: 5px;
    }

    nav ul li {
        margin: 5px 8px;
    }

    .hero {
        padding: 70px 0;
    }

    .hero h2 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .features h2,
    .products h2,
    .process h2 {
        font-size: 2rem;
    }

    .process-steps {
        grid-template-columns: 1fr;
    }

    .features-grid,
    .service-cards .container,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .about-intro h2,
    .services-intro h2,
    .contact-intro h2 {
        font-size: 2rem;
    }

    .company-info ul {
        padding: 20px;
    }

    .company-info ul li {
        flex-direction: column;
        align-items: flex-start;
    }

    .company-info ul li strong {
        min-width: auto;
        margin-bottom: 5px;
    }
}

@media (max-width: 480px) {
    nav ul {
        flex-direction: column;
    }

    nav ul li {
        margin: 8px 0;
    }

    .hero h2 {
        font-size: 1.8rem;
    }

    .features h2,
    .products h2,
    .process h2,
    .about-intro h2,
    .services-intro h2,
    .contact-intro h2 {
        font-size: 1.7rem;
    }

    .hero {
        padding: 50px 0;
    }

    .btn {
        padding: 12px 30px;
        font-size: 1rem;
    }

    .feature-card,
    .service-card {
        padding: 25px 20px;
    }
}