/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 配色方案 */
:root {
    --primary-red: #d32f2f;
    --dark-red: #b71c1c;
    --black: #212121;
    --gray-dark: #424242;
    --gray-medium: #757575;
    --gray-light: #f5f5f5;
    --white: #ffffff;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--dark-red);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(211, 47, 47, 0.3);
}

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

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

.logo {
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--black);
}

.logo-text {
    letter-spacing: 1px;
}

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

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

.nav-links li {
    margin-left: 40px;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

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

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--black);
    cursor: pointer;
}

/* 英雄横幅 */
.hero {
    background: linear-gradient(rgba(33, 33, 33, 0.8), rgba(33, 33, 33, 0.9)), url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    color: var(--white);
    padding: 120px 0;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 40px;
    color: var(--gray-light);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 区块通用样式 */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    color: var(--black);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--primary-red);
}

.section-subtitle {
    text-align: center;
    color: var(--gray-medium);
    margin-bottom: 50px;
    font-size: 1.1rem;
}

/* 企业简介 */
.intro-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 60px;
    margin-top: 50px;
}

.intro-text {
    flex: 1;
    min-width: 300px;
}

.intro-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--gray-dark);
}

.intro-stats {
    flex: 1;
    min-width: 300px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background-color: var(--gray-light);
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--gray-dark);
}

/* 合作伙伴 */
.partners-section {
    background-color: var(--gray-light);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.partner-logo {
    background-color: var(--white);
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-medium);
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.partner-logo:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    color: var(--primary-red);
}

/* 资质与荣誉 */
.qualifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.qualification-card {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    border-top: 4px solid var(--primary-red);
}

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

/* 合作伙伴分页容器 */
.partners-container {
    position: relative;
    min-height: 400px;
}

/* 合作伙伴logo图片样式 */
.partner-logo img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

.partner-logo.empty {
    background-color: transparent;
    box-shadow: none;
    border: 2px dashed var(--gray-light);
}

.partner-logo.empty:hover {
    transform: none;
    box-shadow: none;
    cursor: default;
}

/* 合作伙伴分页指示器 */
.partners-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 40px;
    gap: 15px;
}

.page-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--gray-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.page-dot.active {
    background-color: var(--primary-red);
    transform: scale(1.2);
}

.page-dot:hover {
    background-color: var(--primary-red);
    transform: scale(1.1);
}

.qualification-icon {
    font-size: 2.5rem;
    color: var(--primary-red);
    margin-bottom: 20px;
}

.qualification-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--black);
}

.qualification-card p {
    color: var(--gray-medium);
    line-height: 1.6;
}

/* 项目案例 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.project-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

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

.project-image {
    height: 200px;
    background-color: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-medium);
}

.project-info {
    padding: 25px;
}

.project-info h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--black);
}

.project-info p {
    color: var(--gray-medium);
    line-height: 1.6;
}

/* 联系方式 */
.contact-section {
    background-color: var(--gray-light);
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 60px;
    margin-top: 50px;
    align-items: flex-start;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--black);
}

.contact-info p {
    margin-bottom: 15px;
    color: var(--gray-dark);
    font-size: 1.1rem;
}

.contact-info i {
    color: var(--primary-red);
    margin-right: 10px;
    width: 20px;
}

.social-links {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background-color: var(--white);
    color: var(--gray-dark);
    border-radius: 50%;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-links a:hover {
    background-color: var(--primary-red);
    color: var(--white);
    transform: translateY(-3px);
}

.contact-qr {
    flex: 0 0 auto;
    text-align: center;
}

.qr-code {
    width: 200px;
    height: 200px;
    background-color: var(--white);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.qr-placeholder {
    color: var(--gray-medium);
    font-weight: 500;
}

.qr-image {
    width: 180px;
    height: 180px;
    border-radius: 6px;
    object-fit: cover;
}

.contact-qr p {
    color: var(--gray-dark);
    font-size: 1rem;
}

/* 页脚 */
.footer {
    background-color: var(--black);
    color: var(--white);
    text-align: center;
    padding: 30px 0;
}

.footer p {
    margin-bottom: 10px;
    color: var(--gray-light);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.8rem;
    }

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

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav-links.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

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

    .hero {
        padding: 80px 0;
    }

    .hero-title {
        font-size: 2.3rem;
    }

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

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .intro-stats {
        grid-template-columns: 1fr;
    }

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

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

    .contact-content {
        flex-direction: column;
        align-items: center;
    }

    .contact-info {
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 1.8rem;
    }

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

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

    .intro-content {
        flex-direction: column;
    }
}