/* 全局重置与基础 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8ecf1 100%);
    color: #333;
    line-height: 1.8;
    font-size: 16px;
    transition: background 0.3s, color 0.3s;
}

a {
    color: #1a73e8;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

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

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

/* 导航栏 - 毛玻璃效果 */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: background 0.3s, box-shadow 0.3s;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a2e;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    color: #333;
    font-weight: 500;
    font-size: 15px;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s, color 0.2s;
}

.nav-links a:hover {
    border-bottom-color: #1a73e8;
    color: #1a73e8;
    text-decoration: none;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #333;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 6px;
}

.search-box input {
    padding: 6px 12px;
    border: 1px solid #ddd;
    border-radius: 20px;
    font-size: 14px;
    outline: none;
    width: 180px;
    transition: width 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.search-box input:focus {
    width: 240px;
    border-color: #1a73e8;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

.search-box button {
    background: #1a73e8;
    color: #fff;
    border: none;
    border-radius: 20px;
    padding: 6px 16px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s, transform 0.2s;
}

.search-box button:hover {
    background: #1557b0;
    transform: scale(1.05);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 48px;
    height: 48px;
    background: #1a73e8;
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 999;
    transition: opacity 0.3s, transform 0.3s, background 0.3s;
}

.back-to-top.show {
    display: flex;
}

.back-to-top:hover {
    background: #1557b0;
    transform: translateY(-3px);
}

/* Banner - 渐变与轮播 */
.banner {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    padding: 80px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(233, 69, 96, 0.1) 0%, transparent 70%);
    animation: bannerGlow 6s ease-in-out infinite;
}

@keyframes bannerGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(20px, 20px); }
}

.banner-slide {
    display: none;
    animation: fadeIn 0.8s ease;
    position: relative;
    z-index: 1;
}

.banner-slide.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.banner h1 {
    font-size: 42px;
    margin-bottom: 20px;
    font-weight: 800;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.banner p {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

.banner .btn {
    display: inline-block;
    background: #e94560;
    color: #fff;
    padding: 14px 36px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 18px;
    transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}

.banner .btn:hover {
    background: #d63851;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(233, 69, 96, 0.6);
    text-decoration: none;
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 30px;
    position: relative;
    z-index: 1;
}

.banner-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
}

.banner-dots span.active {
    background: #e94560;
    transform: scale(1.3);
}

/* 通用标题 */
.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: #e94560;
    margin: 10px auto 0;
    border-radius: 2px;
}

.section-title p {
    color: #666;
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

/* 品牌介绍 - 毛玻璃卡片 */
.brand-intro {
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.brand-text h3 {
    font-size: 28px;
    margin-bottom: 16px;
    color: #1a1a2e;
}

.brand-text p {
    margin-bottom: 12px;
    color: #555;
}

.brand-text .info-row {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
}

.brand-text .info-row span {
    background: rgba(240, 244, 255, 0.8);
    backdrop-filter: blur(5px);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 14px;
    color: #1a73e8;
    border: 1px solid rgba(26, 115, 232, 0.1);
}

.brand-svg {
    display: flex;
    justify-content: center;
}

/* 产品优势 - 圆角卡片 + hover动画 */
.products {
    padding: 60px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8ecf1 100%);
}

.prod-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.prod-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 16px;
    padding: 30px 24px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.prod-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.95);
}

.prod-card svg {
    margin: 0 auto 16px;
    width: 64px;
    height: 64px;
    transition: transform 0.3s;
}

.prod-card:hover svg {
    transform: scale(1.1) rotate(5deg);
}

.prod-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #1a1a2e;
}

.prod-card p {
    color: #666;
    font-size: 14px;
}

/* 解决方案 - 毛玻璃卡片 */
.solutions {
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.sol-item {
    background: rgba(240, 244, 255, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 16px;
    padding: 28px 24px;
    border-left: 4px solid #1a73e8;
    transition: transform 0.3s, box-shadow 0.3s;
}

.sol-item:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.sol-item h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: #1a1a2e;
}

.sol-item p {
    color: #555;
    font-size: 14px;
}

/* 行业应用 - 圆角卡片 */
.applications {
    padding: 60px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8ecf1 100%);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.app-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.app-card svg {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    transition: transform 0.3s;
}

.app-card:hover svg {
    transform: scale(1.15);
}

.app-card h4 {
    font-size: 18px;
    margin-bottom: 6px;
}

.app-card p {
    color: #666;
    font-size: 13px;
}

/* 客户案例 - 圆角卡片 */
.cases {
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.case-card {
    background: rgba(248, 249, 250, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 16px;
    padding: 24px;
    transition: box-shadow 0.3s, transform 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.case-card:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transform: translateY(-3px);
}

.case-card h4 {
    font-size: 18px;
    margin-bottom: 6px;
    color: #1a1a2e;
}

.case-card p {
    color: #666;
    font-size: 14px;
}

.case-card .tag {
    display: inline-block;
    background: #e94560;
    color: #fff;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    margin-top: 8px;
}

/* 客户评价 - 毛玻璃卡片 */
.testimonials {
    padding: 60px 0;
    background: linear-gradient(135deg, #f0f4ff 0%, #e0e8ff 100%);
}

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

.testi-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.testi-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.testi-card .stars {
    color: #f5a623;
    font-size: 18px;
    margin-bottom: 8px;
}

.testi-card p {
    color: #555;
    font-style: italic;
}

.testi-card .author {
    margin-top: 12px;
    font-weight: 600;
    color: #1a1a2e;
}

/* 新闻/文章 - 圆角卡片 */
.news {
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.news-card {
    background: rgba(248, 249, 250, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 16px;
    padding: 24px;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.news-card .date {
    font-size: 13px;
    color: #999;
    margin-bottom: 6px;
}

.news-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: #1a1a2e;
}

.news-card p {
    color: #666;
    font-size: 14px;
    margin-bottom: 12px;
}

.news-card .read-more {
    color: #1a73e8;
    font-weight: 500;
    font-size: 14px;
    transition: color 0.2s;
}

.news-card .read-more:hover {
    color: #e94560;
}

/* FAQ - 毛玻璃卡片 */
.faq {
    padding: 60px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8ecf1 100%);
}

.faq-item {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    margin-bottom: 12px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    transition: box-shadow 0.3s;
}

.faq-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.faq-question {
    padding: 18px 24px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 16px;
    color: #1a1a2e;
    transition: background 0.2s;
}

.faq-question:hover {
    background: rgba(240, 244, 255, 0.5);
}

.faq-question .icon {
    font-size: 20px;
    transition: transform 0.3s;
}

.faq-answer {
    padding: 0 24px 18px;
    color: #555;
    line-height: 1.8;
    display: none;
    font-size: 15px;
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-item.open .faq-question .icon {
    transform: rotate(45deg);
}

/* HowTo - 步骤样式 */
.howto {
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.howto-steps {
    max-width: 800px;
    margin: 0 auto;
}

.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    align-items: flex-start;
    transition: transform 0.3s;
}

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

.howto-step .num {
    width: 40px;
    height: 40px;
    background: #1a73e8;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    font-size: 18px;
    transition: background 0.3s, transform 0.3s;
}

.howto-step:hover .num {
    background: #e94560;
    transform: scale(1.1);
}

.howto-step h4 {
    font-size: 18px;
    margin-bottom: 4px;
    color: #1a1a2e;
}

.howto-step p {
    color: #666;
    font-size: 14px;
}

/* 团队介绍 - 毛玻璃卡片 */
.team {
    padding: 60px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8ecf1 100%);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.team-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 16px;
    padding: 24px;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.team-card svg {
    width: 80px;
    height: 80px;
    margin: 0 auto 12px;
    border-radius: 50%;
    transition: transform 0.3s;
}

.team-card:hover svg {
    transform: scale(1.1);
}

.team-card h4 {
    font-size: 18px;
    color: #1a1a2e;
}

.team-card p {
    color: #888;
    font-size: 14px;
}

/* 联系信息 - 毛玻璃卡片 */
.contact {
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.contact-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 12px;
    padding: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.06);
}

.contact-item svg {
    width: 40px;
    height: 40px;
    margin: 0 auto 12px;
}

.contact-item h4 {
    font-size: 18px;
    margin-bottom: 4px;
}

.contact-item p {
    color: #666;
    font-size: 14px;
}

/* 友情链接 - 底部 */
.footer-links {
    padding: 40px 0;
    background: #1a1a2e;
    color: #fff;
}

.footer-links .container {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: space-between;
}

.footer-links .col h4 {
    font-size: 18px;
    margin-bottom: 12px;
    color: #e94560;
}

.footer-links .col a {
    display: block;
    color: #ccc;
    font-size: 14px;
    margin-bottom: 6px;
    transition: color 0.2s, transform 0.2s;
}

.footer-links .col a:hover {
    color: #fff;
    transform: translateX(3px);
    text-decoration: none;
}

.footer-bottom {
    background: #111;
    color: #aaa;
    text-align: center;
    padding: 20px 0;
    font-size: 13px;
}

.footer-bottom a {
    color: #aaa;
    margin: 0 8px;
    transition: color 0.2s;
}

.footer-bottom a:hover {
    color: #fff;
}

/* 暗黑模式 */
.dark-mode {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #eee;
}

.dark-mode .navbar {
    background: rgba(22, 33, 62, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.dark-mode .navbar a {
    color: #ddd;
}

.dark-mode .logo {
    color: #eee;
}

.dark-mode .brand-intro,
.dark-mode .solutions,
.dark-mode .cases,
.dark-mode .news,
.dark-mode .howto,
.dark-mode .contact {
    background: rgba(26, 26, 46, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.dark-mode .products,
.dark-mode .applications,
.dark-mode .faq,
.dark-mode .team {
    background: linear-gradient(135deg, #16213e 0%, #1a1a2e 100%);
}

.dark-mode .prod-card,
.dark-mode .app-card,
.dark-mode .case-card,
.dark-mode .news-card,
.dark-mode .faq-item,
.dark-mode .testi-card,
.dark-mode .team-card,
.dark-mode .contact-item {
    background: rgba(34, 34, 34, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #eee;
    border-color: rgba(255, 255, 255, 0.1);
}

.dark-mode .prod-card p,
.dark-mode .app-card p,
.dark-mode .case-card p,
.dark-mode .news-card p,
.dark-mode .faq-answer,
.dark-mode .testi-card p,
.dark-mode .team-card p,
.dark-mode .contact-item p {
    color: #bbb;
}

.dark-mode .section-title h2,
.dark-mode .brand-text h3,
.dark-mode .prod-card h3,
.dark-mode .sol-item h3,
.dark-mode .case-card h4,
.dark-mode .news-card h3,
.dark-mode .faq-question,
.dark-mode .howto-step h4,
.dark-mode .contact-item h4,
.dark-mode .team-card h4 {
    color: #eee;
}

.dark-mode .sol-item {
    background: rgba(34, 34, 34, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-left-color: #e94560;
}

.dark-mode .brand-text .info-row span {
    background: rgba(51, 51, 51, 0.8);
    color: #e94560;
    border-color: rgba(233, 69, 96, 0.2);
}

.dark-mode .testimonials {
    background: linear-gradient(135deg, #16213e 0%, #1a1a2e 100%);
}

.dark-mode .footer-links {
    background: #0f0f1a;
}

.dark-mode .footer-bottom {
    background: #0a0a12;
}

.dark-mode .banner {
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
}

.dark-mode .search-box input {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: #eee;
}

.dark-mode .search-box input:focus {
    border-color: #e94560;
}

.dark-mode .menu-toggle {
    color: #eee;
}

/* 数字动画 - 渐变背景 */
.counter-section {
    padding: 40px 0;
    background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
    color: #fff;
    text-align: center;
}

.counter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
}

.counter-item .num {
    font-size: 48px;
    font-weight: 800;
    background: linear-gradient(135deg, #e94560, #f5a623);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.counter-item .label {
    font-size: 16px;
    opacity: 0.8;
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        padding: 20px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    }

    .nav-links.open {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .search-box input {
        width: 120px;
    }

    .search-box input:focus {
        width: 160px;
    }

    .banner h1 {
        font-size: 28px;
    }

    .banner p {
        font-size: 16px;
    }

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

    .brand-svg {
        order: -1;
    }

    .footer-links .container {
        flex-direction: column;
        gap: 20px;
    }

    .back-to-top {
        right: 20px;
        bottom: 20px;
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .section-title h2 {
        font-size: 26px;
    }

    .counter-item .num {
        font-size: 36px;
    }
}

/* 小屏设备优化 */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .banner {
        padding: 60px 0 40px;
    }

    .banner h1 {
        font-size: 24px;
    }

    .banner .btn {
        padding: 12px 28px;
        font-size: 16px;
    }

    .prod-card,
    .app-card,
    .case-card,
    .news-card,
    .testi-card,
    .team-card,
    .contact-item {
        padding: 18px;
    }
}

/* 暗黑模式下的导航响应式 */
.dark-mode .nav-links {
    background: rgba(22, 33, 62, 0.95);
}

.dark-mode .nav-links a {
    color: #ddd;
}