/* 全局样式 */
:root {
    --primary-color: #2c50e3;
    --secondary-color: #13b194;
    --dark-color: #1b2132;
    --light-color: #f5f7f9;
    --gray-color: #6c757d;
    --border-color: #e4e7ed;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

body {
    color: #333;
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
    background-color: #fff;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: #2445cb;
    color: white;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

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

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

.header-scrolled {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

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

.logo img {
    height: 36px;
    margin-right: 10px;
}

.logo span {
    font-size: 22px;
    font-weight: 600;
    color: var(--dark-color);
}

.nav-menu {
    display: flex;
    list-style: none;
}

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

.nav-menu a {
    color: var(--dark-color);
    font-weight: 500;
    position: relative;
}

.nav-menu a:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-menu a.active {
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 24px;
}

/* 英雄区域 */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f9fbfd 0%, #eef4ff 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.hero-title span {
    color: var(--primary-color);
}

.hero-description {
    font-size: 18px;
    margin-bottom: 30px;
    color: var(--gray-color);
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.hero-image {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    max-width: 700px;
}

/* 特性部分 */
.features {
    padding: 100px 0;
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray-color);
    max-width: 700px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-item {
    padding: 30px;
    border-radius: 8px;
    background-color: white;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(44, 80, 227, 0.1);
    border-radius: 20px;
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 30px;
    color: var(--primary-color);
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature-description {
    color: var(--gray-color);
}

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

.about-wrapper {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-content {
    flex: 1;
}

.about-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 20px;
}

.about-description {
    margin-bottom: 25px;
    color: var(--gray-color);
}

.stats-items {
    display: flex;
    gap: 40px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-text {
    color: var(--gray-color);
}

/* 团队部分 */
.team {
    padding: 100px 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-member {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.member-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.member-info {
    padding: 20px;
    text-align: center;
}

.member-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.member-position {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 15px;
}

.member-social {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.member-social a {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: #f0f2f5;
    color: var(--gray-color);
    transition: all 0.3s ease;
}

.member-social a:hover {
    background-color: var(--primary-color);
    color: white;
}

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

.contact-wrapper {
    display: flex;
    gap: 50px;
}

.contact-info {
    flex: 1;
}

.contact-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 20px;
}

.contact-list {
    list-style: none;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(44, 80, 227, 0.1);
    border-radius: 50%;
    color: var(--primary-color);
}

.contact-text h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.contact-text p {
    color: var(--gray-color);
}

.contact-form {
    flex: 1;
    background-color: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

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

.form-control {
    display: block;
    width: 100%;
    padding: 12px 15px;
    font-size: 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 80, 227, 0.1);
}

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

/* 底部 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 80px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-logo img {
    height: 36px;
}

.footer-text {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 25px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background-color: var(--primary-color);
}

.footer-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 25px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-newsletter p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.newsletter-form {
    display: flex;
}

.newsletter-input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    border-radius: 4px 0 0 4px;
    font-size: 16px;
}

.newsletter-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0 20px;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.newsletter-btn:hover {
    background-color: #2445cb;
}

.footer-bottom {
    padding: 25px 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 42px;
    }

    .hero-image {
        width: 45%;
    }

    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-wrapper,
    .contact-wrapper {
        flex-direction: column;
    }

    .hero-image {
        display: none;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

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

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-top {
        grid-template-columns: repeat(2, 1fr);
    }

    .menu-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 40px 0;
        transition: all 0.4s ease;
    }

    .nav-menu.active {
        left: 0;
    }

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

@media (max-width: 768px) {
    .section-title {
        font-size: 32px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .team-grid {
        grid-template-columns: 1fr;
        max-width: 350px;
        margin: 0 auto;
    }

    .footer-top {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 10px 25px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}