/* 轮播图专用样式 */
.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    z-index: 0;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.3) 100%);
    z-index: 2;
}

.hero::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
    animation: float 20s infinite linear;
    z-index: 2;
    pointer-events: none;
}

/* 轮播指示器 */
.hero-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 15px;
    align-items: center;
}

.indicator-progress {
    width: 30px;
    height: 10px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
}

.progress-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.indicator-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator-dot:hover {
    background: rgba(255, 255, 255, 0.6);
}

.hero-content {
    text-align: center;
    color: #fff;
    z-index: 3;
    position: relative;
}

.hero h1 {
    font-size: 80px;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: 24px;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.2s both;
}

/* 产品体系 */
.products {
    padding: 100px 50px;
    background: #f8f9fa;
}

.products .section-title {
    color: #333;
    margin-bottom: 60px;
    position: relative;
    font-size: 24px;
    text-align: left;
}

.products .section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 40px;
    height: 4px;
    background: #667eea;
}

.products-content {
    display: flex;
    align-items: center;
    gap: 60px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
}

.products-text {
    flex: 1;
    padding-right: 20px;
}

.products-text h2 {
    font-size: 36px;
    color: #333;
    margin-bottom: 20px;
    font-weight: bold;
    line-height: 1.3;
}

.products-text p {
    color: #666;
    font-size: 25px;
    line-height: 1.8;
    margin-bottom: 40px;
}

.products-btn {
    padding: 15px 40px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    color: #ffffff;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 16px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    font-weight: bold;
}

.products-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.5);
    background: linear-gradient(135deg, #5a6fd6, #6a4190);
}

.products-image {
    flex: 1;
    position: relative;
    overflow: visible;
}

.products-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
    box-shadow: none;
    border: none;
    outline: none;
    transition: opacity 0.5s ease;
    display: block;
}

.products-image img.active {
    opacity: 1;
    position: relative;
    z-index: 2;
}

.products-image img.hidden {
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    pointer-events: none;
}

.products-tabs {
    display: flex;
    gap: 40px;
    margin-top: 50px;
    padding: 0 20px;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.products-tab {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.products-tab.active,
.products-tab:hover {
    border-bottom: 3px solid #667eea;
    background: #f0f4ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
}

.products-tab i {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: #666;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.products-tab.active i {
    background: #667eea;
    color: white;
}

.products-tab span {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.products-tab span.title {
    font-size: 18px;
    font-weight: bold;
    color: #333;
}

.products-tab span.desc {
    font-size: 13px;
    color: #999;
}

.products-tab.active span.title {
    color: #667eea;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .products-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .products-text {
        padding-right: 0;
    }
    
    .products-text h2 {
        font-size: 28px;
    }
    
    .products-text p {
        font-size: 16px;
    }
    
    .products-tabs {
        flex-direction: row;
        gap: 15px;
        padding: 0 15px;
        width: 100%;
        box-sizing: border-box;
        justify-content: center;
    }
    
    .products-tab {
        flex: 1;
        max-width: 200px;
        justify-content: center;
        padding: 12px 20px;
        box-sizing: border-box;
    }
}

/* 小屏幕手机适配 */
@media (max-width: 480px) {
    .products-tabs {
        padding: 0 10px;
        gap: 10px;
    }
    
    .products-tab {
        padding: 10px 15px;
        max-width: 160px;
    }
    
    .products-tab i {
        width: 20px;
        height: 20px;
        font-size: 12px;
    }
    
    .products-tab span.title {
        font-size: 14px;
    }
    
    .products-tab span.desc {
        font-size: 11px;
        display: none;
    }
}

/* 数据统计 */
.stats {
    padding: 100px 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    color: #fff;
    padding: 30px;
}

.stat-number {
    font-size: 72px;
    font-weight: bold;
    margin-bottom: 10px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.stat-label {
    font-size: 20px;
    opacity: 0.9;
}

/* 关于我们 */
.about {
    padding: 0;
    background: #0f0f0f;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.about-video-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    opacity: 0;
    transform: scale(0.5);
}

.about-video-wrapper.animate-in {
    animation: videoWrapperIn 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes videoWrapperIn {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.about-video-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    z-index: 1;
    opacity: 0;
}

.about-overlay.animate-in {
    animation: overlayIn 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.2s;
}

@keyframes overlayIn {
    to {
        opacity: 1;
    }
}

.about-container {
    position: relative;
    z-index: 2;
    max-width: 1400px;
    margin: 0 auto;
    padding: 100px 50px;
    display: flex;
    flex-direction: column;
    gap: 80px;
    width: 100%;
    box-sizing: border-box;
}

.about-content {
    flex: 1;
    opacity: 0;
    transform: translateX(-100px);
    text-align: left;
    width: 100%;
    max-width: 800px;
}

.about-image {
    flex: 1;
    position: relative;
    opacity: 0;
    transform: translateX(-100px);
}

.about-image.animate-in {
    animation: aboutImageIn 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.5s;
}

/* 数据统计区域（融合到公司简介） */
.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding: 40px 60px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 0;
    transform: translateY(50px);
    width: 100%;
    box-sizing: border-box;
}

.about-stats.animate-in {
    animation: aboutStatsIn 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.9s;
}

@keyframes aboutStatsIn {
    to {
        opacity: 1.0;
        transform: translateY(0);
    }
}

.about-stats .stat-item {
    text-align: center;
    color: #fff;
    padding: 20px 15px;
}

.about-stats .stat-number {
    font-size: 56px;
    font-weight: bold;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #fff, rgba(255, 255, 255, 0.7));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-stats .stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.4;
}

@keyframes aboutImageIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.about-content.animate-in {
    animation: aboutContentIn 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.7s;
}

@keyframes aboutContentIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.about-content h2 {
    font-size: 42px;
    color: #fff;
    margin-bottom: 30px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.about-content p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 20px;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
}

/* 响应式设计 - 移动端适配 */
@media (max-width: 768px) {
    .about {
        min-height: auto;
        padding: 40px 0;
        width: 100%;
    }
    
    .about-container {
        padding: 40px 15px;
        gap: 35px;
        width: 100%;
        box-sizing: border-box;
    }
    
    .about-content {
        width: 100%;
        max-width: none;
        text-align: center;
        transform: translateY(50px);
        padding: 0 10px;
        box-sizing: border-box;
    }
    
    .about-content h2 {
        font-size: 26px;
        margin-bottom: 20px;
        line-height: 1.3;
    }
    
    .about-content p {
        font-size: 15px;
        line-height: 1.6;
        margin-bottom: 15px;
        text-align: justify;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 20px 15px;
        width: 100%;
        box-sizing: border-box;
    }
    
    .about-stats .stat-item {
        padding: 12px 8px;
    }
    
    .about-stats .stat-number {
        font-size: 32px;
        margin-bottom: 6px;
    }
    
    .about-stats .stat-label {
        font-size: 13px;
        line-height: 1.3;
    }
    
    /* 移动端动画调整 */
    .about-content.animate-in {
        animation: aboutContentInMobile 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
        animation-delay: 0.5s;
    }
    
    @keyframes aboutContentInMobile {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .about-stats.animate-in {
        animation: aboutStatsInMobile 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
        animation-delay: 0.8s;
    }
    
    @keyframes aboutStatsInMobile {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* 小屏幕手机适配 */
@media (max-width: 480px) {
    .about-container {
        padding: 30px 12px;
        gap: 25px;
    }
    
    .about-content {
        padding: 0 5px;
    }
    
    .about-content h2 {
        font-size: 22px;
        margin-bottom: 15px;
    }
    
    .about-content p {
        font-size: 14px;
        line-height: 1.5;
        margin-bottom: 12px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 15px 10px;
    }
    
    .about-stats .stat-item {
        padding: 10px 8px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 8px;
    }
    
    .about-stats .stat-number {
        font-size: 28px;
        margin-bottom: 5px;
    }
    
    .about-stats .stat-label {
        font-size: 12px;
    }
    
    .btn {
        padding: 12px 30px;
        font-size: 16px;
    }
}

/* 项目案例 */
.projects {
    padding: 0;
    background: #0a0a0a;
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.project-bg-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.project-bg-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    z-index: 1 !important;
    pointer-events: none;
}

.project-bg-slide.active {
    opacity: 1 !important;
    z-index: 2 !important;
}

.projects-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 3;
}

.projects-container {
    position: relative;
    z-index: 4;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    max-width: 1600px;
    margin: 0 auto;
    padding: 100px 50px;
    width: 100%;
    box-sizing: border-box;
}

.projects-intro {
    display: flex;
    flex-direction: column;
    gap: 30px;
    justify-content: center;
}

.projects-intro .section-title {
    color: #fff;
    font-size: 56px;
    margin: 0;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    line-height: 1.2;
}

.intro-text {
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
    line-height: 1.8;
    text-align: justify;
}

.intro-btn {
    padding: 18px 50px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    color: white;
    border-radius: 35px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 18px;
    font-weight: bold;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    align-self: flex-start;
}

.intro-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.6);
}

.projects-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    align-content: center;
}

.project-card-item {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    padding: 35px 30px;
    cursor: pointer;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.project-card-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.project-card-item:hover::before {
    opacity: 1;
}

.project-card-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
    border-color: rgba(102, 126, 234, 0.5);
}

.card-number {
    font-size: 64px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.4;
    line-height: 1;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
}

.project-card-item h3 {
    font-size: 24px;
    color: #fff;
    margin-bottom: 15px;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

.project-card-item p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.learn-more {
    color: #667eea;
    font-size: 16px;
    font-weight: bold;
    text-decoration: none;
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.project-card-item:hover .learn-more {
    color: #fff;
    transform: translateX(5px);
}

/* 详情弹窗 */
.project-detail-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.project-detail-modal.active {
    display: flex;
}

.modal-content {
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.95), rgba(22, 33, 62, 0.95));
    border-radius: 25px;
    padding: 60px;
    max-width: 900px;
    width: 90%;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 25px;
    background: none;
    border: none;
    color: #fff;
    font-size: 36px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(90deg);
}

.detail-card {
    display: flex;
    gap: 50px;
    align-items: center;
}

.detail-number {
    font-size: 120px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    line-height: 1;
}

.detail-info h3 {
    font-size: 42px;
    color: #fff;
    margin-bottom: 25px;
}

.detail-info p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 20px;
    line-height: 1.8;
}

/* 新闻资讯 */
.news {
    padding: 100px 50px;
    background: #f8f9fa;
}

.news .section-title {
    color: #333;
    margin-bottom: 60px;
    position: relative;
    font-size: 24px;
    text-align: left;
}

.news .section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 40px;
    height: 4px;
    background: #667eea;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1800px;
    margin: 0 auto;
}

.news-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

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

.news-content {
    padding: 30px;
}

.news-date {
    color: #667eea;
    font-size: 14px;
    margin-bottom: 15px;
    font-weight: bold;
}

.news-title {
    font-size: 18px;
    color: #333;
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-excerpt {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 25px;
}

.read-more {
    color: #667eea;
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.read-more:hover {
    color: #764ba2;
    gap: 10px;
}

/* 新闻资讯 - 移动端适配 */
@media (max-width: 1200px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-image {
        height: 200px;
    }
}

/* 可持续发展 */
.sustainability {
    position: relative;
    padding: 100px 0;
    background: #ffffff; /* 纯白色背景 */
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sustainability-bg {
    display: none; /* 隐藏背景图片 */
}

.sustainability-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
}

.sustainability-content .section-title {
    font-size: 36px;
    color: #333;
    margin-bottom: 30px;
    line-height: 1.3;
}

.sustainability-text {
    font-size: 25px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 40px;
    text-align: center;
}

.btn-primary {
    display: inline-block;
    padding: 15px 40px;
    background: #667eea; /* 蓝色背景 */
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    text-decoration: none; /* 去掉下划线 */
}

.btn-primary:hover {
    background: #764ba2; /* 悬停时变紫色 */
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    text-decoration: none; /* 悬停时也没有下划线 */
}

/* 轮播指示器 */
.hero-indicators {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 4;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid #fff;
}

.indicator.active {
    background: #fff;
    transform: scale(1.3);
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
}

/* ========== 项目案例 - 移动端适配 ========== */
@media (max-width: 768px) {
    .projects {
        min-height: auto;
        padding: 60px 0;
    }
    
    .projects-container {
        grid-template-columns: 1fr;
        gap: 50px;
        padding: 60px 20px;
    }
    
    .projects-intro {
        text-align: center;
        align-items: center;
    }
    
    .projects-intro .section-title {
        font-size: 36px;
        line-height: 1.3;
    }
    
    .intro-text {
        font-size: 16px;
        line-height: 1.6;
        text-align: center;
    }
    
    .intro-btn {
        align-self: center;
        padding: 15px 40px;
        font-size: 16px;
    }
    
    .projects-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .project-card-item {
        padding: 25px 20px;
    }
    
    .card-number {
        font-size: 48px;
        margin-bottom: 10px;
    }
    
    .project-card-item h3 {
        font-size: 20px;
        margin-bottom: 12px;
    }
    
    .project-card-item p {
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 15px;
    }
    
    .learn-more {
        font-size: 14px;
    }
}

/* 小屏幕手机适配 */
@media (max-width: 480px) {
    .projects {
        padding: 40px 0;
    }
    
    .projects-container {
        padding: 40px 15px;
        gap: 40px;
    }
    
    .projects-intro .section-title {
        font-size: 28px;
    }
    
    .intro-text {
        font-size: 15px;
    }
    
    .intro-btn {
        padding: 12px 30px;
        font-size: 15px;
        width: 100%;
        max-width: 300px;
    }
    
    .project-card-item {
        padding: 20px 15px;
        border-radius: 15px;
    }
    
    .card-number {
        font-size: 40px;
    }
    
    .project-card-item h3 {
        font-size: 18px;
    }
    
    .project-card-item p {
        font-size: 13px;
    }
    
    .learn-more {
        font-size: 13px;
    }
    
    /* 弹窗移动端适配 */
    .modal-content {
        padding: 40px 25px;
        width: 95%;
    }
    
    .detail-card {
        flex-direction: column;
        gap: 30px;
    }
    
    .detail-number {
        font-size: 80px;
    }
    
    .detail-info h3 {
        font-size: 28px;
    }
    
    .detail-info p {
        font-size: 16px;
    }
    
    .modal-close {
        top: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
        font-size: 28px;
    }
}