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

:root {
    --primary-color: #c8102e;
    --secondary-color: #1a1a2e;
    --accent-color: #ffd700;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f5f5f5;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    background: #000000;
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    width: 100%;
    height: 86px;
    z-index: 1000;
    transition: all 0.3s ease;
}

/* 分割线 */
.divider {
    position: fixed;
    top: 86px;
    left: 0;
    width: 100%;
    height: 20px;
    background-color: #1a1a1a;
    z-index: 999;
}

.navbar .container {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 0 40px;
    height: 100%;
    max-width: 100%;
    gap: 35rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    height: 100%;
    flex-shrink: 0;
}

.logo {
    width: 432px;
    height: 53px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    margin: 0;
    padding: 0;
    align-items: center;
    margin-left: 0;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
    display: block;
    position: relative;
}

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

.nav-menu a:hover {
    color: var(--accent-color);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 20px;
    height: 2px;
    background: var(--white);
    transition: all 0.3s ease;
}

/* Hero区域 */
.hero {
    width: 100%;
    height: 500px;
    margin: 106px auto 0;
    background-color: #1a1a1a;
    background-image: url('../images/BN-4.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 100%;
    padding-left: 50px;
}

.hero-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 30px;
}

/* 标题样式 */
.hero-title {
    width: 500px;
    height: 72px;
    margin: 0;
    padding: 0;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    color: #ffffff;
}

/* 文本区域样式 */
.hero-description-wrapper {
    width: 500px;
    height: 74px;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.hero-description {
    margin: 0;
    padding: 0;
    text-align: left;
    color: #ffffff;
}

/* 按钮区域样式 */
.hero-buttons {
    width: 467px;
    height: 48px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 16px;
    margin: 0;
    padding: 0;
}

/* 按钮样式 */
.hero-buttons .btn {
    width: 145px;
    height: 48px;
    display: block;
    text-decoration: none;
    border: none;
    cursor: pointer;
    padding: 0;
    margin: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.btn-1 {
    background-image: url('../images/btn-1.png');
}

.btn-2 {
    background-image: url('../images/btn-2.png');
}

.btn-3 {
    background-image: url('../images/btn-3.png');
}

/* 新闻资讯 */
.news {
    padding: 5rem 0;
    background-color: #1a1a1a;
    background-image: url('../images/news-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
}

.news::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.news-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 2rem;
    padding-left: 20px;
    line-height: 1.2;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 0 20px;
}

.news-card {
    background: #2a2a2a;
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.news-banner {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.news-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card:hover .news-banner img {
    transform: scale(1.05);
}

.news-content {
    padding: 1.5rem;
}

.news-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-description {
    font-size: 0.9rem;
    color: #999999;
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-date {
    font-size: 0.85rem;
    color: #c8102e;
    font-weight: 500;
}

/* 手机App展示 */
.app-showcase {
    padding: 5rem 0;
    background: #1a1a1a;
}

.app-showcase-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 0 20px;
}

.app-showcase-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1.5rem;
    text-align: center;
}

.app-showcase-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.app-images-grid {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 0 20px;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
}

.app-image-item {
    flex: 0 0 auto;
    width: 200px;
    height: 400px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    scroll-snap-align: start;
}

.app-image-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.app-image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 背景图片板块 */
.banner-section {
    width: 100%;
    height: 900px;
    background-image: url('../images/banner-section.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #1a1a1a;
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.banner-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.banner-section .container {
    position: relative;
    z-index: 2;
    width: 100%;
    padding-top: 3rem;
}

.banner-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.banner-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
    line-height: 1.2;
}

.banner-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.8;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
}

/* 红龙官方APP新版 */
.app-preview {
    padding: 5rem 0;
    background: #1a1a1a;
    background-image: url('../images/app-preview-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
}

.app-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.app-preview .container {
    position: relative;
    z-index: 2;
}

.app-preview-header {
    text-align: center;
    margin-bottom: 4rem;
    padding: 0 20px;
}

.app-preview-title {
    font-size: 3rem;
    font-weight: 700;
    color: #c8102e;
    background: rgba(200, 16, 46, 0.1);
    margin-bottom: 1.5rem;
    padding: 1rem 2rem;
    display: inline-block;
    border-radius: 10px;
    border: 2px solid rgba(200, 16, 46, 0.3);
}

.app-preview-desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.app-preview-phones {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
    padding: 0 20px;
}

.phone-item {
    flex: 0 0 auto;
    width: 300px;
    max-width: 100%;
    height: auto;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: #000;
    padding: 10px;
}

.phone-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 80px rgba(200, 16, 46, 0.4);
}

.phone-item img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 25px;
}

/* 文章正文 */
.article {
    padding: 5rem 0;
    background: var(--bg-color);
}

.article-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    line-height: 1.3;
    text-align: center;
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #e0e0e0;
}

.article-date,
.article-author {
    font-size: 0.95rem;
    color: var(--text-light);
}

.article-date::before {
    content: '📅 ';
}

.article-author::before {
    content: '✍️ ';
}

.article-body {
    line-height: 1.8;
    color: var(--text-color);
}

.article-body p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.article-body h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.article-body h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.article-body ul,
.article-body ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.article-body li {
    margin-bottom: 0.75rem;
    font-size: 1.05rem;
}

.article-body strong {
    font-weight: 600;
    color: var(--secondary-color);
}

.article-body a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.article-body a:hover {
    color: #a00d26;
    text-decoration: underline;
}

.article-body {
    text-align: left;
}

.article-keywords {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e0e0e0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.keyword-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #f5f5f5;
    color: var(--text-color);
    font-size: 0.9rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    border: 1px solid #e0e0e0;
}

.keyword-tag:hover {
    background: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(200, 16, 46, 0.2);
}

/* 特色功能 */
.features {
    padding: 5rem 0;
    background: var(--bg-color);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

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

/* 下载区域 */
.download {
    padding: 5rem 0;
    background: var(--white);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.download-card {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #16213e 100%);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    color: var(--white);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.download-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.download-card p {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

/* 联系我们 */
.contact {
    padding: 5rem 0;
    background: var(--bg-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-item h3 {
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.contact-item p {
    color: var(--text-light);
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-form h3 {
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
}

.contact-form textarea {
    resize: vertical;
}

/* 页脚 */
.footer {
    background: #1a1a1a;
    color: #ffffff;
    padding: 3rem 0 1.5rem;
    margin-top: 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #ffffff;
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: #ff69b4;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-disclaimer {
    color: #ff69b4;
    font-size: 0.85rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        width: 100%;
        height: 68px;
    }

    .logo {
        width: 200px;
        height: 32px;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 88px;
        flex-direction: column;
        background: #000000;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

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

    .divider {
        top: 68px;
    }

    .hero {
        width: 100%;
        height: 214px;
        margin: 88px auto 0;
        background-color: #1a1a1a;
        background-image: url('../images/mb-BN-h5.jpg');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
    }

    .hero-content {
        padding-left: 30px;
    }

    .hero-text {
        gap: 10px;
        align-items: flex-start;
    }

    /* 移动端标题和文本区域容器 - 总高度134px */
    .hero-title,
    .hero-description-wrapper {
        width: 172px;
        margin-left: 0;
    }

    /* 移动端标题样式 */
    .hero-title {
        width: 172px;
        height: 60px;
        font-size: 1.2rem;
        margin: 0;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: flex-start;
        text-align: left;
    }

    /* 移动端文本区域样式 */
    .hero-description-wrapper {
        width: 172px;
        height: 64px;
        margin: 0;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: flex-start;
    }

    .hero-description {
        font-size: 0.75rem;
        line-height: 1.3;
        margin: 0;
        padding: 0;
        text-align: left;
    }

    /* 移动端按钮区域样式 */
    .hero-buttons {
        width: 100%;
        max-width: 280px;
        height: auto;
        min-height: 36px;
        gap: 8px;
        justify-content: center;
        align-items: center;
        margin: 0 auto;
        display: flex;
        transform: translateX(15px);
    }

    /* 移动端按钮样式 */
    .hero-buttons .btn {
        width: 88px;
        height: 36px;
        background-size: contain;
    }


    .news-title {
        font-size: 1.8rem;
        padding-left: 15px;
        margin-bottom: 1.5rem;
        line-height: 1.2;
    }

    .news-grid {
        display: flex;
        flex-direction: row;
        gap: 1rem;
        padding: 0 15px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
        scrollbar-width: thin;
    }

    .news-card {
        min-width: 280px;
        scroll-snap-align: start;
        border-radius: 10px;
    }

    .news-banner {
        height: 180px;
    }

    .news-content {
        padding: 1rem;
    }

    .news-card-title {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

    .news-card-description {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }

    .news-date {
        font-size: 0.8rem;
    }

    .app-showcase-header {
        margin-bottom: 2rem;
        padding: 0 15px;
    }

    .app-showcase-title {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .app-showcase-description {
        font-size: 0.9rem;
        line-height: 1.6;
        padding: 0 15px;
    }

    .app-images-grid {
        gap: 1rem;
        padding: 0 15px;
        justify-content: flex-start;
        scroll-snap-type: x proximity;
    }

    .app-image-item {
        width: 160px;
        height: 320px;
        min-width: 160px;
        scroll-snap-align: start;
        border-radius: 15px;
    }

    .app-preview {
        padding: 3rem 0;
    }

    .app-preview-header {
        margin-bottom: 2.5rem;
        padding: 0 15px;
    }

    .app-preview-title {
        font-size: 1.8rem;
        padding: 0.75rem 1.5rem;
    }

    .app-preview-desc {
        font-size: 1rem;
        padding: 0 15px;
    }

    .app-preview-phones {
        flex-direction: column;
        gap: 1.5rem;
        padding: 0 15px;
    }

    .phone-item {
        width: 100%;
        max-width: 280px;
    }

    .banner-section {
        height: 356px;
    }

    .banner-section .container {
        padding-top: 1.5rem;
    }

    .banner-content {
        padding: 0 15px;
    }

    .banner-title {
        font-size: 1.3rem;
        margin-bottom: 0.75rem;
    }

    .banner-description {
        font-size: 0.8rem;
        line-height: 1.5;
    }

    .article-title {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .article-meta {
        flex-direction: column;
        gap: 0.75rem;
        margin-bottom: 2rem;
        padding-bottom: 1rem;
    }

    .article-content {
        padding: 0 15px;
    }

    .article-body p {
        font-size: 1rem;
        margin-bottom: 1.25rem;
    }

    .article-body h2 {
        font-size: 1.5rem;
        margin-top: 2rem;
        margin-bottom: 0.75rem;
    }

    .article-body h3 {
        font-size: 1.3rem;
        margin-top: 1.5rem;
        margin-bottom: 0.75rem;
    }

    .article-body ul,
    .article-body ol {
        padding-left: 1.5rem;
    }

    .article-body li {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

    .article-keywords {
        margin-top: 2rem;
        padding-top: 1.5rem;
        gap: 0.5rem;
    }

    .keyword-tag {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .footer-column {
        margin-bottom: 1.5rem;
    }

    .footer-logo {
        height: 40px;
    }

    .footer-bottom {
        padding-top: 1.5rem;
    }

    .footer-bottom p {
        font-size: 0.85rem;
    }

    .footer-disclaimer {
        font-size: 0.8rem;
    }

    .features-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }

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

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


/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.download-card {
    animation: fadeInUp 0.6s ease-out;
}