/* 全局样式 */
:root {
    --primary-color: #4a6bff;
    --secondary-color: #32e0c4;
    --dark-color: #222831;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --border-radius: 5px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #ffffff;
    overflow-x: hidden;
}

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

section {
    padding: 80px 0;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

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

.section-header h2 {
    font-size: 36px;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-header p {
    color: var(--gray-color);
    font-size: 18px;
}

.highlight {
    color: var(--primary-color);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background-color: #3457e8;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(74, 107, 255, 0.3);
}

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(74, 107, 255, 0.3);
}

.btn-small {
    padding: 8px 20px;
    font-size: 14px;
}

/* 导航栏 */
header {
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

header.scrolled {
    background-color: white;
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
}

.logo-text {
    color: var(--primary-color);
}

.logo-small {
    font-size: 12px;
    background-color: var(--primary-color);
    color: white;
    padding: 2px 5px;
    border-radius: 3px;
    margin-left: 5px;
}

.nav-links ul {
    display: flex;
}

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

.nav-links ul li a {
    font-weight: 500;
    position: relative;
}

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

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

.nav-links ul li a:hover::after {
    width: 100%;
}

.fa-bars, .fa-times {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)),
                url('https://images.unsplash.com/photo-1542751371-adc38448a05e?auto=compress&cs=tinysrgb&w=1920&q=80') no-repeat center center/cover;
    height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    color: white;
    position: relative;
}

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

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    color: rgba(255, 255, 255, 0.9);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

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

.about-text h3 {
    margin-bottom: 15px;
    font-size: 24px;
}

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

.stats {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.stat {
    text-align: center;
}

.stat .number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.stat .label {
    font-size: 16px;
    color: var(--gray-color);
}

/* 服务 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
}

.service-card p {
    color: var(--gray-color);
}

/* 作品展示 */
.portfolio {
    background-color: var(--light-color);
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.filter-btn {
    background: none;
    border: none;
    padding: 8px 20px;
    margin: 5px;
    cursor: pointer;
    font-size: 16px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

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

.portfolio-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    height: 250px;
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    padding: 20px;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay h3 {
    margin-bottom: 10px;
}

.portfolio-overlay p {
    margin-bottom: 15px;
}

/* 团队 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.team-member {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.member-image {
    height: 250px;
    overflow: hidden;
}

.member-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.team-member:hover .member-image img {
    transform: scale(1.1);
}

.team-member h3 {
    padding: 20px 20px 5px 20px;
}

.team-member .position {
    color: var(--primary-color);
    padding: 0 20px;
    margin-bottom: 10px;
    font-weight: 500;
}

.team-member .bio {
    padding: 0 20px;
    color: var(--gray-color);
    margin-bottom: 20px;
    font-size: 14px;
}

.social-links {
    display: flex;
    padding: 0 20px 20px 20px;
    gap: 10px;
}

.social-links a {
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-color);
    border-radius: 50%;
    transition: var(--transition);
}

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

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

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

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

.info-icon {
    font-size: 24px;
    color: var(--primary-color);
    margin-right: 20px;
    min-width: 40px;
}

.info-text h3 {
    margin-bottom: 5px;
}

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

.info-text a:hover {
    color: var(--primary-color);
}

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

.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #e6e6e6;
    border-radius: var(--border-radius);
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.contact-form input:focus, .contact-form textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 107, 255, 0.25);
}

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

/* 地图 */
.map {
    padding: 0;
}

/* 页脚 */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo .logo-text {
    font-size: 24px;
    font-weight: 700;
}

.footer-logo p {
    margin-top: 15px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-content h3 {
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-content h3::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
    bottom: 0;
    left: 0;
}

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

.footer-links ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.social-icons {
    display: flex;
    gap: 10px;
}

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

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

.footer-newsletter input {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
    outline: none;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

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

.footer-bottom-links {
    display: flex;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.7);
    margin-left: 20px;
}

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

/* 响应式设计 */
@media (max-width: 991px) {
    .hero-content h1 {
        font-size: 40px;
    }

    .about-content, .contact-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: 2;
    }

    .about-text {
        order: 1;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -300px;
        width: 300px;
        height: 100vh;
        background-color: white;
        z-index: 1001;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links ul {
        flex-direction: column;
        align-items: center;
    }

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

    .fa-bars, .fa-times {
        display: block;
    }

    .fa-times {
        position: absolute;
        top: 20px;
        right: 20px;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-content p {
        font-size: 18px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons .btn {
        width: 100%;
        margin-bottom: 10px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-bottom-links {
        margin-top: 15px;
        justify-content: center;
    }

    .footer-bottom-links a {
        margin: 0 10px;
    }
}

@media (max-width: 576px) {
    section {
        padding: 60px 0;
    }

    .services-grid, .portfolio-grid, .team-grid {
        grid-template-columns: 1fr;
    }

    .stats {
        flex-direction: column;
        gap: 20px;
    }
}

/* hero内部图片 */
.hero-image {
    margin-top: 40px;
}

.hero-image img {
    width: calc(100% + 30px); /* 加上container左右15px内边距 */
    margin-left: -15px; /* 向左偏移填满 */
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}