/* 全局样式 */
:root {
    --primary-color: #2680EB; /* 蓝色 */
    --secondary-color: #E94D6F; /* 粉红色 */
    --accent-color: #6B4DE9; /* 紫色 */
    --orange-color: #FF8A3D; /* 橙色 */
    --light-blue: #E6F0FF;
    --gradient-blue: linear-gradient(135deg, #2680EB 0%, #6B4DE9 100%);
    --white: #ffffff;
    --black: #333333;
    --gray: #777777;
    --light-gray: #f5f5f5;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--black);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-blue);
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(38, 128, 235, 0.2);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* 导航栏 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

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

.logo img {
    height: 50px;
}

.nav-links {
    display: flex;
}

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

.nav-links a {
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区 */
.hero {
    padding: 150px 0 100px;
    background: var(--light-blue);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    flex: 1;
    padding-right: 50px;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 80%;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(38, 128, 235, 0.2);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero h1 span {
    color: var(--secondary-color);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--gray);
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

/* 特点区域 */
.features {
    padding: 100px 0;
    background-color: var(--white);
}

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

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-blue);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.8rem;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* 应用展示 */
.app-showcase {
    padding: 100px 0;
    background-color: var(--light-gray);
}

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

.showcase-item {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.showcase-item:hover {
    transform: translateY(-10px);
}

.showcase-item img {
    width: 100%;
    height: auto;
    max-height: 450px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    padding: 15px 15px 0;
}

.showcase-item h3 {
    padding: 20px 20px 10px;
    color: var(--primary-color);
}

.showcase-item p {
    padding: 0 20px 20px;
    color: var(--gray);
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background-color: var(--white);
}

.about-content {
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-text {
    max-width: 800px;
    text-align: center;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--gray);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background-color: var(--light-blue);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
}

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

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 15px;
    margin-top: 5px;
}

.contact-item h3 {
    margin-bottom: 5px;
    color: var(--primary-color);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
}

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

/* 页脚 */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 70px 0 20px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 30px;
}

.footer-logo {
    margin-bottom: 30px;
}

.footer-logo img {
    height: 60px;
    margin-bottom: 15px;
}

.footer-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
}

.footer-nav li {
    margin: 0 15px 10px;
}

.footer-nav a {
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    padding: 5px 10px;
    border-radius: 5px;
}

.footer-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 50px;
    }

    .hero-buttons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        z-index: 999;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 15px 0;
        text-align: center;
    }

    .mobile-menu {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}

/* 滚动效果 */
header.scrolled {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    background-color: rgba(255, 255, 255, 0.95);
}