/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

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

/* 顶部信息栏 */
.top-bar {
    background: #1a1a1a;
    color: #fff;
    padding: 8px 0;
    font-size: 14px;
}

.contact-info {
    display: flex;
    justify-content: flex-end;
    gap: 20px;
}

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

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

/* Logo区域 */
.logo-area {
    flex: 0 0 200px;
}

.logo h1 {
    font-size: 24px;
    margin: 0;
    color: #333;
}

/* 导航菜单 */
.nav {
    flex: 1;
    text-align: center;
    margin: 0 15px;
}

.nav-list {
    display: flex;
    justify-content: center;
    margin: 0;
    padding: 0;
    list-style: none;
    flex-wrap: wrap;
    gap: 3px;
}

.nav-link {
    display: block;
    padding: 8px 10px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: #007bff;
}

/* 搜索区域 */
.search-area {
    flex: 0 0 180px;
    margin-left: 10px;
}

.search-form {
    display: flex;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 13px;
}

.search-btn {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    padding: 0 15px;
    background: #007bff;
    border: none;
    border-radius: 0 4px 4px 0;
    color: #fff;
    cursor: pointer;
    transition: background 0.3s;
}

.search-btn:hover {
    background: #0056b3;
}

/* 移动端菜单（纯 CSS checkbox 控制） */
.nav-toggle {
    position: fixed;
    opacity: 0;
    width: 0;
    height: 0;
    margin: 0;
    pointer-events: none;
    z-index: -1;
}

.mobile-menu {
    display: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1002;
}

.mobile-menu span {
    display: block;
    width: 25px;
    height: 2px;
    background: #333;
    margin: 5px 0;
    transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle:checked ~ .header .mobile-menu span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle:checked ~ .header .mobile-menu span:nth-child(2) {
    opacity: 0;
}

.nav-toggle:checked ~ .header .mobile-menu span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* 移动端导航 */
.mobile-nav {
    display: block;
    visibility: hidden;
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: #fff;
    z-index: 1001;
    padding: 60px 20px 20px;
    transition: left 0.3s, visibility 0.3s;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    overflow-y: auto;
}

.nav-toggle:checked ~ .mobile-nav {
    left: 0;
    visibility: visible;
}

.mobile-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav-link {
    display: block;
    padding: 15px 0;
    color: #333;
    text-decoration: none;
    font-size: 16px;
    border-bottom: 1px solid #eee;
    transition: color 0.3s;
    text-align: center;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    color: #007bff;
}

/* 移动端遮罩层 */
.nav-overlay {
    display: block;
    visibility: hidden;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    opacity: 0;
    cursor: pointer;
    transition: opacity 0.3s, visibility 0.3s;
}

.nav-toggle:checked ~ .nav-overlay {
    visibility: visible;
    opacity: 1;
}

body:has(#nav-toggle:checked) {
    overflow: hidden;
}

/* 英雄区域 */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    padding-right: 20px;
}

.hero-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    color: #1a1a1a;
    line-height: 1.2;
}

.hero-content p {
    font-size: 20px;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.6;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: 0.3s;
}

.btn-primary {
    background: #007bff;
    color: #fff;
}

.btn-primary:hover {
    background: #0056b3;
}

.btn-secondary {
    background: #fff;
    color: #007bff;
    border: 1px solid #007bff;
}

.btn-secondary:hover {
    background: #f8f9fa;
}

.hero-image {
    position: relative;
    height: 500px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
    transition: transform 0.3s;
}

.hero-image:hover .hero-img {
    transform: scale(1.05);
}

.hero-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(0,0,0,0.2), transparent);
    pointer-events: none;
}

.hero-stats {
    display: flex;
    gap: 30px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    padding: 15px 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: bold;
    color: #007bff;
    margin-bottom: 5px;
    line-height: 1;
}

.stat-text {
    font-size: 16px;
    color: #666;
}

/* 英雄区域增强 */
.hero-subtitle {
    font-size: 24px;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.4;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
}

.tag {
    background: rgba(0, 123, 255, 0.1);
    color: #007bff;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tag:hover {
    background: #007bff;
    color: #fff;
    transform: translateY(-2px);
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.hero-feature:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}

.hero-feature i {
    color: #007bff;
    font-size: 20px;
}

.hero-feature span {
    font-size: 16px;
    color: #333;
}

.hero-image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 30px;
    color: #fff;
}

.overlay-content {
    display: flex;
    justify-content: space-around;
    gap: 20px;
}

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

.overlay-number {
    display: block;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 5px;
}

.overlay-text {
    font-size: 14px;
    opacity: 0.9;
}

/* 服务特点 */
.features {
    padding: 80px 0;
    background: #fff;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #1a1a1a;
}

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

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #1a1a1a;
}

.feature-card p {
    color: #666;
}

/* 服务特点列表 */
.feature-list {
    list-style: none;
    margin-top: 15px;
    padding: 0;
}

.feature-list li {
    padding: 5px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.feature-list li:before {
    content: "•";
    color: #007bff;
    position: absolute;
    left: 0;
}

/* 服务优势 */
.advantages {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.advantage-item {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #00bcd4);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.advantage-item:hover::before {
    transform: scaleX(1);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    background: #f8f9fa;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    transition: all 0.3s ease;
}

.advantage-item:hover .advantage-icon {
    background: #007bff;
    color: #fff;
    transform: rotateY(180deg);
}

.advantage-icon i {
    font-size: 30px;
    color: #007bff;
    transition: all 0.3s ease;
}

.advantage-item:hover .advantage-icon i {
    color: #fff;
}

.advantage-content {
    flex: 1;
}

.advantage-content h3 {
    font-size: 22px;
    color: #1a1a1a;
    margin-bottom: 15px;
    position: relative;
    padding-bottom: 15px;
}

.advantage-content h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: #007bff;
}

.advantage-content p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.advantage-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.advantage-features li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 25px;
    transition: all 0.3s ease;
}

.advantage-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #007bff;
    font-weight: bold;
}

.advantage-features li:hover {
    color: #007bff;
    transform: translateX(5px);
}

/* 服务保障 */
.guarantee {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.guarantee-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.guarantee-item {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.guarantee-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, #007bff, #00bcd4);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.3s ease;
}

.guarantee-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.guarantee-item:hover::before {
    transform: scaleY(1);
}

.guarantee-icon {
    width: 70px;
    height: 70px;
    background: #f8f9fa;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    transition: all 0.3s ease;
}

.guarantee-item:hover .guarantee-icon {
    background: #007bff;
    color: #fff;
    transform: rotateY(180deg);
}

.guarantee-icon i {
    font-size: 30px;
    color: #007bff;
    transition: all 0.3s ease;
}

.guarantee-item:hover .guarantee-icon i {
    color: #fff;
}

.guarantee-content {
    flex: 1;
}

.guarantee-content h3 {
    font-size: 22px;
    color: #1a1a1a;
    margin-bottom: 15px;
    position: relative;
    padding-bottom: 15px;
}

.guarantee-content h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: #007bff;
}

.guarantee-content p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.guarantee-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.guarantee-features li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 25px;
    transition: all 0.3s ease;
}

.guarantee-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #007bff;
    font-weight: bold;
}

.guarantee-features li:hover {
    color: #007bff;
    transform: translateX(5px);
}

@media (max-width: 1200px) {
    .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .guarantee-grid {
        grid-template-columns: 1fr;
    }
    
    .guarantee-item {
        padding: 25px;
    }
    
    .guarantee-icon {
        width: 60px;
        height: 60px;
    }
    
    .guarantee-icon i {
        font-size: 24px;
    }
    
    .guarantee-content h3 {
        font-size: 20px;
    }
}

@media (max-width: 576px) {
    .guarantee {
        padding: 60px 0;
    }
    
    .guarantee-item {
        padding: 20px;
    }
    
    .guarantee-features li {
        font-size: 14px;
    }
}

/* 关于我们 */
.about {
    padding: 80px 0;
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-text p {
    margin-bottom: 30px;
    color: #666;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-icon {
    color: #007bff;
    font-weight: bold;
}

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

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s;
}

.about-image:hover img {
    transform: scale(1.05);
}

/* 服务流程 */
.process {
    padding: 80px 0;
    background: #fff;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.step {
    text-align: center;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 10px;
    transition: transform 0.3s;
}

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

.step-number {
    width: 50px;
    height: 50px;
    background: #007bff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #1a1a1a;
}

.step p {
    color: #666;
}

/* 服务流程详情 */
.step-details {
    list-style: none;
    margin-top: 15px;
    padding: 0;
}

.step-details li {
    padding: 5px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.step-details li:before {
    content: "→";
    color: #007bff;
    position: absolute;
    left: 0;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: #f8f9fa;
}

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

.contact-info {
    display: grid;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.contact-icon {
    font-size: 24px;
}

.contact-form form {
    display: grid;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

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

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

.footer-info h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

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

.footer-links a {
    color: #fff;
    text-decoration: none;
    display: block;
    padding: 5px 0;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #007bff;
}

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

/* 响应式设计优化 */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
    
    .nav-link {
        padding: 8px 8px;
        font-size: 13px;
    }
    
    .search-area {
        flex: 0 0 160px;
    }
    
    .hero-content h2 {
        font-size: 40px;
    }
    
    .hero-content p {
        font-size: 18px;
    }
    
    .advantages-grid,
    .guarantee-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }
    
    .nav {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .search-area {
        display: none;
    }
    
    .mobile-nav {
        display: block;
    }
    
    .header-wrapper {
        padding: 10px 0;
    }
    
    .logo-area {
        flex: 0 0 150px;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        padding-right: 0;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        height: 400px;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-content h2 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 30px;
    }
    
    .features-grid,
    .process-steps,
    .advantages-grid,
    .guarantee-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .stat-text {
        font-size: 14px;
    }
    
    .advantage-item,
    .guarantee-item,
    .case-card {
        padding: 25px;
    }
    
    .advantage-icon,
    .guarantee-icon,
    .case-icon {
        width: 60px;
        height: 60px;
    }
    
    .advantage-icon i,
    .guarantee-icon i {
        font-size: 24px;
    }
    
    .advantage-content h3,
    .guarantee-content h3,
    .case-content h3 {
        font-size: 20px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-tags {
        justify-content: center;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero-content h2 {
        font-size: 28px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .stat-number {
        font-size: 24px;
    }
    
    .feature-list li,
    .step-details li,
    .advantage-features li,
    .guarantee-features li {
        font-size: 14px;
    }
    
    .advantages,
    .guarantee,
    .cases {
        padding: 60px 0;
    }
    
    .advantage-item,
    .guarantee-item,
    .case-card {
        padding: 20px;
    }
    
    .advantage-features li,
    .guarantee-features li {
        font-size: 14px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .tag {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .hero-feature {
        padding: 12px;
    }
    
    .hero-feature i {
        font-size: 16px;
    }
    
    .hero-feature span {
        font-size: 14px;
    }
    
    .case-header,
    .case-content {
        padding: 15px;
    }
    
    .case-content h3 {
        font-size: 18px;
    }
    
    .case-description {
        font-size: 14px;
    }
    
    .detail-label,
    .detail-value {
        font-size: 13px;
    }
    
    .mobile-nav {
        width: 100%;
        max-width: none;
    }
    
    .mobile-nav-link {
        font-size: 15px;
        padding: 12px 0;
    }
    
    .logo-area {
        flex: 0 0 120px;
    }
    
    .logo h1 {
        font-size: 18px;
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    .advantage-item:hover,
    .guarantee-item:hover,
    .case-card:hover,
    .hero-feature:hover,
    .tag:hover {
        transform: none;
    }
    
    .advantage-item:active,
    .guarantee-item:active,
    .case-card:active,
    .hero-feature:active,
    .tag:active {
        opacity: 0.8;
    }
}

/* 高分辨率屏幕支持 */
@media (min-width: 1920px) {
    .container {
        max-width: 1600px;
    }
    
    .hero-content h2 {
        font-size: 56px;
    }
    
    .hero-content p {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 42px;
    }
}

/* 打印样式优化 */
@media print {
    .header,
    .mobile-nav,
    .nav-overlay,
    .nav-toggle,
    .contact-form,
    .footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
    
    .hero,
    .features,
    .about,
    .process,
    .contact {
        padding: 20px 0;
    }
    
    .section-title {
        font-size: 18pt;
    }
    
    .feature-card,
    .step,
    .advantage-item,
    .guarantee-item,
    .case-card {
        break-inside: avoid;
    }
}

/* 成功案例 */
.cases {
    padding: 80px 0;
    background: #fff;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.case-card {
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.case-header {
    padding: 25px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.case-icon {
    font-size: 32px;
    width: 60px;
    height: 60px;
    background: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.case-badge {
    background: #28a745;
    color: #fff;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.case-content {
    padding: 25px;
}

.case-content h3 {
    font-size: 20px;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.case-description {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.case-details {
    display: grid;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.case-detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.detail-label {
    color: #666;
    font-size: 14px;
}

.detail-value {
    color: #1a1a1a;
    font-weight: 500;
}

@media (max-width: 1200px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-header {
        padding: 20px;
    }
    
    .case-content {
        padding: 20px;
    }
    
    .case-icon {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }
}

@media (max-width: 576px) {
    .cases {
        padding: 60px 0;
    }
    
    .case-header {
        padding: 15px;
    }
    
    .case-content {
        padding: 15px;
    }
    
    .case-content h3 {
        font-size: 18px;
    }
    
    .case-description {
        font-size: 14px;
    }
    
    .detail-label,
    .detail-value {
        font-size: 13px;
    }
}

/* ===== Logo 链接 ===== */
.logo a {
    text-decoration: none;
    color: inherit;
}

.logo a:hover h1 {
    color: #007bff;
}

.nav-item-home.active .nav-link,
.nav-list li.active .nav-link {
    color: #007bff;
}

.section-desc {
    text-align: center;
    color: #666;
    margin: -30px auto 40px;
    max-width: 640px;
    font-size: 16px;
}

/* ===== 常见问题 ===== */
.faq {
    padding: 80px 0;
    background: #fff;
}

.faq-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.faq-item {
    background: #f8f9fa;
    padding: 28px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.faq-item:hover {
    transform: translateY(-4px);
}

.faq-item h3 {
    font-size: 18px;
    color: #1a1a1a;
    margin-bottom: 12px;
}

.faq-item p {
    color: #666;
    font-size: 15px;
    line-height: 1.7;
}

/* ===== 首页文章板块 5列×2行 ===== */
.home-articles {
    padding: 80px 0;
    background: #f8f9fa;
}

.home-articles-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.home-article-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.home-article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.home-article-thumb {
    display: block;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: #e9ecef;
}

.home-article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.home-article-card:hover .home-article-thumb img {
    transform: scale(1.05);
}

.home-article-info {
    padding: 14px;
}

.home-article-title {
    font-size: 14px;
    line-height: 1.45;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.9em;
}

.home-article-title a {
    color: #1a1a1a;
    text-decoration: none;
}

.home-article-title a:hover {
    color: #007bff;
}

.home-article-date {
    font-size: 12px;
    color: #999;
}

.home-articles .home-article-desc,
.home-articles .home-article-intro,
.home-articles .home-article-body,
.home-articles .home-article-card > p,
.home-articles .home-article-card .intro,
.home-articles .home-article-info p,
.home-articles .home-article-info .description {
    display: none !important;
}

.home-articles .home-article-info time,
.home-articles .home-article-info .home-article-date {
    display: block !important;
}

.home-articles-more {
    text-align: center;
    margin-top: 40px;
}

.clear {
    clear: both;
}

/* ===== 内页布局 ===== */
.page-banner {
    margin-top: 0;
    padding: 48px 0 40px;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d3748 100%);
    color: #fff;
}

.page-banner-title {
    font-size: clamp(22px, 3.5vw, 32px);
    margin-top: 12px;
    line-height: 1.35;
    word-break: break-word;
}

.breadcrumb {
    font-size: 14px;
    opacity: 0.9;
}

.breadcrumb a {
    color: #b8d4ff;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: #fff;
}

.breadcrumb-sep {
    margin: 0 8px;
    opacity: 0.5;
}

.breadcrumb-current {
    opacity: 0.85;
}

.page-main {
    padding: 40px 0 60px;
}

.page-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 28px;
    align-items: start;
}

.page-content {
    background: #fff;
    border-radius: 10px;
    padding: 28px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    min-width: 0;
}

/* ===== 列表页 ===== */
.article-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.article-list-item {
    display: flex;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px solid #eee;
}

.article-list-item:first-child {
    padding-top: 0;
}

.article-list-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.article-list-thumb {
    flex: 0 0 200px;
    max-width: 200px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #eee;
    background: #f8f9fa;
    display: block;
}

.article-list-thumb img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    display: block;
}

.article-list-body {
    flex: 1;
    min-width: 0;
}

.article-list-title {
    font-size: 18px;
    margin-bottom: 10px;
    line-height: 1.4;
}

.article-list-title a {
    color: #1a1a1a;
    text-decoration: none;
}

.article-list-title a:hover {
    color: #007bff;
}

.article-list-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: #999;
    margin-bottom: 10px;
}

.article-list-meta a {
    color: #007bff;
}

.article-list-intro {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    font-size: 14px;
    font-weight: 600;
    color: #007bff;
    text-decoration: none;
}

.read-more:hover {
    text-decoration: underline;
}

/* ===== 分页左右布局 ===== */
.pagebar {
    margin-top: 28px;
    padding-top: 22px;
    border-top: 1px solid #eee;
}

.pagelist-lr {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
}

.pagelist {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.pagelist-lr .pre,
.pagelist-lr .prepage {
    margin-right: auto;
}

.pagelist-lr .next,
.pagelist-lr .nextpage {
    margin-left: auto;
}

.pagelist-lr .end,
.pagelist-lr .endpage {
    margin-left: 4px;
}

.pagelist-lr li.end,
.pagelist-lr li.endpage {
    display: list-item !important;
}

.pagelist .end,
.pagelist .endpage {
    display: inline-block !important;
}

.pagelist a,
.pagelist span {
    display: inline-block;
    padding: 8px 14px;
    font-size: 13px;
    border: 1px solid #ddd;
    border-radius: 4px;
    color: #333;
    background: #fff;
    text-decoration: none;
}

.pagelist a:hover,
.pagelist .thisclass a {
    background: #007bff;
    border-color: #007bff;
    color: #fff !important;
}

.pagelist .pageinfo {
    border: none;
    background: none;
    color: #999;
    padding: 0 8px;
}

/* ===== 内容页 ===== */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    font-size: 14px;
    color: #999;
    padding-bottom: 18px;
    margin-bottom: 18px;
    border-bottom: 1px solid #eee;
}

.article-meta a {
    color: #007bff;
}

.article-litpic {
    margin-bottom: 24px;
    text-align: center;
}

.article-litpic img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    border: 1px solid #eee;
}

.article-litpic:empty,
.article-litpic img[src=""] {
    display: none;
}

.article-body {
    font-size: 16px;
    line-height: 1.8;
    color: #333;
    word-break: break-word;
}

.article-body img {
    max-width: 100% !important;
    height: auto !important;
    margin: 12px auto;
    border-radius: 6px;
}

.article-gallery-item {
    margin: 16px 0;
    text-align: center;
}

.article-gallery-item img {
    max-width: 100%;
    border-radius: 6px;
}

.article-gallery-item figcaption {
    display: block;
    font-size: 13px;
    color: #999;
    margin-top: 8px;
}

.z85549meta-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 28px;
    padding-top: 22px;
    border-top: 1px solid #eee;
    list-style: none;
}

.z85549tagitem a {
    display: inline-block;
    padding: 5px 12px;
    font-size: 12px;
    background: rgba(0, 123, 255, 0.1);
    color: #007bff;
    border-radius: 20px;
    text-decoration: none;
}

.z85549tagitem a:hover {
    background: #007bff;
    color: #fff;
}

.article-prenext {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 28px;
    padding-top: 22px;
    border-top: 1px solid #eee;
    font-size: 14px;
}

.prenext-item {
    flex: 1;
    min-width: 0;
    word-break: break-word;
    color: #666;
}

.prenext-item a {
    color: #007bff;
    text-decoration: none;
}

.prenext-item a:hover {
    text-decoration: underline;
}

/* 避免上一篇/下一篇标签重复输出多条链接 */
.prenext-prev a ~ a {
    display: none !important;
}

.prenext-next a:not(:last-of-type) {
    display: none !important;
}

.prenext-next {
    text-align: right;
}

.related-block {
    margin-top: 32px;
    padding-top: 28px;
    border-top: 1px solid #eee;
}

.related-heading {
    font-size: 20px;
    color: #1a1a1a;
    margin-bottom: 18px;
}

.related-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.related-item {
    display: flex;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid #eee;
}

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

.related-thumb {
    flex: 0 0 100px;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid #eee;
    display: block;
}

.related-thumb img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.related-body h4 {
    font-size: 15px;
    margin-bottom: 6px;
}

.related-body h4 a {
    color: #1a1a1a;
    text-decoration: none;
}

.related-body h4 a:hover {
    color: #007bff;
}

.related-body p {
    font-size: 13px;
    color: #666;
    line-height: 1.6;
}

/* ===== 侧栏 ===== */
.page-sidebar {
    position: sticky;
    top: 90px;
}

.sidebar-widget {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.sidebar-title {
    font-size: 18px;
    color: #1a1a1a;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid #007bff;
}

.sidebar-title a {
    color: inherit;
    text-decoration: none;
}

.sidebar-title a:hover {
    color: #007bff;
}

.sidebar-article-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 680px;
    overflow-y: auto;
}

.sidebar-article-item {
    border-bottom: 1px solid #f0f0f0;
}

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

.sidebar-article-link {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 10px 0;
    text-decoration: none;
    transition: background 0.2s;
}

.sidebar-article-link:hover {
    opacity: 0.85;
}

.sidebar-thumb {
    flex: 0 0 56px;
    width: 56px;
    height: 42px;
    border-radius: 4px;
    overflow: hidden;
    background: #f0f0f0;
}

.sidebar-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sidebar-article-title {
    flex: 1;
    font-size: 13px;
    line-height: 1.45;
    color: #333;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sidebar-article-link:hover .sidebar-article-title {
    color: #007bff;
}

/* ===== 内页与首页文章响应式 ===== */
@media (max-width: 1200px) {
    .home-articles-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 260px;
    }
}

@media (max-width: 992px) {
    .home-articles-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .page-sidebar {
        position: static;
        order: 2;
    }

    .page-content {
        order: 1;
    }

    .sidebar-article-list {
        max-height: none;
    }
}

@media (max-width: 768px) {
    .faq-list {
        grid-template-columns: 1fr;
    }

    .home-articles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .page-banner {
        padding: 36px 0 28px;
    }

    .page-content {
        padding: 20px 16px;
    }

    .article-list-item {
        flex-direction: column;
        gap: 14px;
    }

    .article-list-thumb {
        flex: none;
        max-width: 100%;
        width: 100%;
    }

    .article-prenext {
        flex-direction: column;
        gap: 12px;
    }

    .prenext-item.prenext-next {
        text-align: left;
    }

    .related-item {
        flex-direction: column;
    }

    .related-thumb {
        flex: none;
        width: 100%;
    }

    .pagelist-lr li.pre,
    .pagelist-lr li.prepage,
    .pagelist-lr li:first-child {
        margin-right: 0;
    }

    .pagelist-lr li.next,
    .pagelist-lr li.nextpage,
    .pagelist-lr li.end,
    .pagelist-lr li.endpage {
        margin-left: 0;
    }
}

@media (max-width: 576px) {
    .faq,
    .home-articles {
        padding: 60px 0;
    }

    .home-articles-grid {
        grid-template-columns: 1fr;
    }

    .home-article-title {
        min-height: auto;
    }

    .page-main {
        padding: 28px 0 40px;
    }

    .pagelist a,
    .pagelist span {
        padding: 6px 10px;
        font-size: 12px;
    }
}