/* ==========================================
   全局样式
   ========================================== */
:root {
    --primary-color: #0066cc;
    --secondary-color: #ff6600;
    --text-dark: #1a1a1a;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --border-color: #e0e0e0;
    --white: #ffffff;
    --success: #10b981;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

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

/* ==========================================
   头部导航
   ========================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    display: block;
    transition: opacity 0.3s;
}

.logo img {
    height: 60px;
    width: auto;
}

.logo a:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
    background: rgba(0, 102, 204, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s;
}

/* ==========================================
   Hero 区域
   ========================================== */
.hero {
    background: linear-gradient(135deg, #0066cc 0%, #0052a3 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: bold;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
}

.feature-item i {
    font-size: 24px;
    color: var(--secondary-color);
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================
   按钮样式
   ========================================== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
    font-size: 16px;
}

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

.btn-primary:hover {
    background: #e55a00;
    border-color: #e55a00;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

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

.btn-large {
    padding: 15px 40px;
    font-size: 18px;
}

/* ==========================================
   区块标题
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
}

/* ==========================================
   关于我们区域
   ========================================== */
.about-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

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

/* ==========================================
   服务项目区域
   ========================================== */
.services-section {
    padding: 80px 0;
}

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

.service-card {
    background: var(--white);
    border-radius: 10px;
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.service-icon i {
    font-size: 40px;
    color: var(--white);
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.service-card > p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.7;
}

.service-features {
    list-style: none;
    margin: 20px 0;
}

.service-features li {
    padding: 8px 0;
    color: var(--text-light);
    position: relative;
    padding-left: 25px;
}

.service-features li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--success);
}

.service-link {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 500;
    margin-top: 15px;
    transition: all 0.3s;
}

.service-link:hover {
    color: var(--secondary-color);
    transform: translateX(5px);
}

/* ==========================================
   合作品牌区域
   ========================================== */
.brands-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    margin-top: 40px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.brand-item {
    background: var(--white);
    border-radius: 12px;
    padding: 25px 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 140px;
}

.brand-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.brand-item img {
    max-width: 120px;
    max-height: 60px;
    width: auto;
    height: auto;
    object-fit: contain;
    margin-bottom: 15px;
    filter: grayscale(20%);
    transition: filter 0.3s ease;
}

.brand-item:hover img {
    filter: grayscale(0%);
}

.brand-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
    text-align: center;
    line-height: 1.3;
}

@media (max-width: 768px) {
    .brands-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }

    .brand-item {
        padding: 15px 10px;
        min-height: 110px;
    }

    .brand-item img {
        max-width: 80px;
        max-height: 40px;
        margin-bottom: 10px;
    }

    .brand-name {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================
   为什么选择我们
   ========================================== */
.why-choose-section {
    padding: 80px 0;
}

.why-choose-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.why-item {
    display: flex;
    gap: 20px;
    padding: 30px;
    background: var(--bg-light);
    border-radius: 10px;
    transition: all 0.3s;
}

.why-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}

.why-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.why-icon i {
    font-size: 28px;
    color: var(--white);
}

.why-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.why-item p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 15px;
}

/* ==========================================
   联系表单区域
   ========================================== */
.contact-form-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.contact-form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 50px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ==========================================
   页脚
   ========================================== */
.footer {
    background: #1a1a1a;
    color: #ccc;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 20px;
}

.footer-section p {
    margin-bottom: 10px;
    line-height: 1.7;
}

.footer-contact {
    margin-top: 20px;
}

.footer-contact a {
    color: var(--secondary-color);
}

.footer-contact a:hover {
    color: var(--white);
}

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

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

.footer-links a {
    color: #ccc;
    transition: all 0.3s;
}

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

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 5px;
}

.footer-credits a {
    color: var(--secondary-color);
}

.footer-credits a:hover {
    color: var(--white);
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 90px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 20px 0;
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

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

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

    .why-choose-grid {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 30px 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 50px 0;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-features {
        gap: 20px;
    }

    .feature-item {
        font-size: 16px;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* ==========================================
   页面标题区域
   ========================================== */
.page-header {
    background: linear-gradient(135deg, #0066cc 0%, #0052a3 100%);
    color: var(--white);
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.95;
}

/* ==========================================
   关于我们页面特定样式
   ========================================== */
.company-intro {
    padding: 80px 0;
}

.intro-text {
    max-width: 900px;
    margin: 0 auto;
}

.intro-text h2 {
    font-size: 32px;
    color: var(--text-dark);
    margin-bottom: 25px;
}

.intro-text .lead {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-dark);
    font-weight: 500;
    margin-bottom: 25px;
}

.intro-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 20px;
}

.mission-section {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.mission-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s;
}

.mission-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.mission-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.mission-icon i {
    font-size: 40px;
    color: var(--white);
}

.mission-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.mission-card p {
    color: var(--text-light);
    line-height: 1.7;
}

.advantages-section {
    padding: 80px 0;
}

.advantages-content {
    max-width: 900px;
    margin: 0 auto;
}

.advantage-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    padding: 30px;
    background: var(--bg-light);
    border-radius: 10px;
    transition: all 0.3s;
}

.advantage-item:hover {
    background: var(--white);
    box-shadow: var(--shadow);
}

.advantage-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    color: var(--white);
}

.advantage-info h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.advantage-info p {
    color: var(--text-light);
    line-height: 1.8;
}

.case-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.case-highlight {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    padding: 50px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.case-icon {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-icon i {
    font-size: 50px;
    color: var(--white);
}

.case-content h3 {
    font-size: 26px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.case-location {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 16px;
}

.case-location i {
    color: var(--primary-color);
    margin-right: 5px;
}

.case-description {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 30px;
}

.case-stats {
    display: flex;
    gap: 40px;
}

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

.stat-value {
    display: block;
    font-size: 36px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

.testimonials-section {
    padding: 80px 0;
}

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

.testimonial-card {
    background: var(--bg-light);
    padding: 35px 30px;
    border-radius: 10px;
    transition: all 0.3s;
}

.testimonial-card:hover {
    background: var(--white);
    box-shadow: var(--shadow);
    transform: translateY(-3px);
}

.testimonial-rating {
    color: #ffc107;
    margin-bottom: 20px;
    font-size: 18px;
}

.testimonial-text {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 25px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.testimonial-author strong {
    color: var(--text-dark);
    font-size: 16px;
}

.testimonial-author span {
    color: var(--text-light);
    font-size: 14px;
}

.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #0066cc 0%, #0052a3 100%);
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================
   产品页面特定样式
   ========================================== */
.products-nav {
    padding: 40px 0;
    background: var(--bg-light);
}

.products-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.product-nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 25px 30px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    font-weight: 500;
    color: var(--text-dark);
}

.product-nav-item:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.product-nav-item i {
    font-size: 28px;
}

.product-category {
    padding: 80px 0;
}

.product-category.alt-bg {
    background: var(--bg-light);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 25px;
    margin-bottom: 30px;
}

.category-icon {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-icon i {
    font-size: 40px;
    color: var(--white);
}

.category-title h2 {
    font-size: 36px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.category-title p {
    font-size: 18px;
    color: var(--text-light);
}

.category-intro {
    max-width: 900px;
    margin: 0 auto 50px;
}

.category-intro p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
}

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

.product-card {
    background: var(--white);
    padding: 35px 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.product-category:not(.alt-bg) .product-card {
    background: var(--bg-light);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    background: var(--white);
}

.product-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.product-icon i {
    font-size: 32px;
    color: var(--white);
}

.product-card h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.product-card > p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-features {
    list-style: none;
    margin: 20px 0;
}

.product-features li {
    padding: 8px 0;
    color: var(--text-light);
    position: relative;
    padding-left: 25px;
    font-size: 15px;
}

.product-features li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--success);
}

.service-promise {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.promise-item {
    text-align: center;
    padding: 35px 25px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.promise-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.promise-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.promise-icon i {
    font-size: 32px;
    color: var(--white);
}

.promise-item h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.promise-item p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ==========================================
   FAQ页面特定样式
   ========================================== */
.faq-categories {
    padding: 40px 0;
    background: var(--bg-light);
}

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

.faq-cat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 25px 20px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    color: var(--text-dark);
    text-align: center;
}

.faq-cat-item:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.faq-cat-item i {
    font-size: 32px;
}

.faq-content {
    padding: 80px 0;
}

.faq-section {
    margin-bottom: 60px;
}

.faq-section-title {
    font-size: 28px;
    color: var(--text-dark);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 15px;
}

.faq-section-title i {
    color: var(--primary-color);
}

.faq-list {
    max-width: 900px;
}

.faq-item {
    background: var(--bg-light);
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item:hover {
    box-shadow: var(--shadow);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    cursor: pointer;
    user-select: none;
}

.faq-question h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin: 0;
    flex: 1;
}

.faq-question i {
    flex-shrink: 0;
    color: var(--primary-color);
    transition: transform 0.3s;
    font-size: 18px;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    border-top: 1px solid var(--border-color);
}

.faq-answer p,
.faq-answer ul,
.faq-answer ol {
    padding: 25px 30px;
    color: var(--text-light);
    line-height: 1.8;
    margin: 0;
}

.faq-answer ul,
.faq-answer ol {
    padding-left: 50px;
}

.faq-answer li {
    margin-bottom: 10px;
}

.faq-answer strong {
    color: var(--text-dark);
}

.faq-cta {
    background: var(--bg-light);
    padding: 60px 40px;
    border-radius: 10px;
    text-align: center;
    margin-top: 60px;
}

.faq-cta-content h2 {
    font-size: 32px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.faq-cta-content p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 30px;
}

/* ==========================================
   联系页面特定样式
   ========================================== */
.contact-main {
    padding: 80px 0;
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 40px;
}

.contact-info-card {
    background: var(--bg-light);
    padding: 40px 35px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.contact-info-card h2 {
    font-size: 28px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.contact-intro {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), #0052a3);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-item-icon i {
    font-size: 24px;
    color: var(--white);
}

.contact-item-info h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.contact-item-info p {
    color: var(--text-light);
    margin-bottom: 5px;
}

.contact-item-info a {
    color: var(--primary-color);
    font-weight: 500;
}

.contact-item-info a:hover {
    color: var(--secondary-color);
}

.contact-note {
    display: block;
    font-size: 14px;
    color: var(--text-light);
    font-style: italic;
    margin-top: 5px;
}

.business-hours-card {
    background: var(--bg-light);
    padding: 35px 30px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.business-hours-card h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.business-hours-card h3 i {
    color: var(--primary-color);
}

.hours-section {
    margin-bottom: 25px;
}

.hours-section:last-child {
    margin-bottom: 0;
}

.hours-section h4 {
    font-size: 16px;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.hours-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.hours-item:last-child {
    border-bottom: none;
}

.hours-day {
    color: var(--text-light);
}

.hours-time {
    color: var(--text-dark);
    font-weight: 500;
}

.quick-tips-card {
    background: var(--bg-light);
    padding: 35px 30px;
    border-radius: 10px;
}

.quick-tips-card h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.quick-tips-card h3 i {
    color: var(--secondary-color);
}

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

.tips-list li {
    padding: 10px 0;
    color: var(--text-light);
    line-height: 1.7;
    position: relative;
    padding-left: 25px;
}

.tips-list li::before {
    content: '\f0a4';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--secondary-color);
}

.tips-list a {
    color: var(--primary-color);
    text-decoration: underline;
}

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

.contact-form-card {
    background: var(--white);
    padding: 50px 45px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-form-card h2 {
    font-size: 28px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.form-intro {
    color: var(--text-light);
    margin-bottom: 35px;
    line-height: 1.7;
}

.form-consent {
    margin: 20px 0;
}

.form-consent small {
    color: var(--text-light);
    line-height: 1.6;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.form-footer {
    text-align: center;
    margin-top: 20px;
}

.form-footer p {
    color: var(--text-light);
    font-size: 14px;
}

.form-footer i {
    color: var(--success);
    margin-right: 5px;
}

.map-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.map-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    margin-top: 20px;
}

.map-placeholder {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.map-info {
    background: var(--white);
    padding: 35px 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.map-info h3 {
    font-size: 24px;
    color: var(--text-dark);
    margin-bottom: 25px;
}

.map-info-item {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.map-info-item:last-child {
    margin-bottom: 0;
}

.map-info-item i {
    flex-shrink: 0;
    font-size: 24px;
    color: var(--primary-color);
    margin-top: 5px;
}

.map-info-item strong {
    display: block;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.map-info-item p {
    color: var(--text-light);
    line-height: 1.7;
    margin: 0;
}

.quick-contact-section {
    padding: 60px 0;
    background: linear-gradient(135deg, #ff6600 0%, #e55a00 100%);
    text-align: center;
}

.quick-contact-content h2 {
    font-size: 32px;
    color: var(--white);
    margin-bottom: 15px;
}

.quick-contact-content p {
    font-size: 18px;
    color: var(--white);
    margin-bottom: 30px;
    opacity: 0.95;
}

.quick-contact-content .btn {
    background: var(--white);
    color: var(--secondary-color);
    border-color: var(--white);
}

.quick-contact-content .btn:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* ==========================================
   额外的响应式设计
   ========================================== */
@media (max-width: 968px) {
    .page-header h1 {
        font-size: 32px;
    }

    .case-highlight {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .case-stats {
        justify-content: center;
    }

    .contact-layout {
        grid-template-columns: 1fr;
    }

    .map-container {
        grid-template-columns: 1fr;
    }

    .advantage-item {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 28px;
    }

    .products-nav-grid {
        grid-template-columns: 1fr;
    }

    .category-header {
        flex-direction: column;
        text-align: center;
    }

    .contact-form-card {
        padding: 35px 25px;
    }
}