/* 基础重置与全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
}

body {
    background: #f8fafc;
    color: #1e293b;
    line-height: 1.7;
    scroll-behavior: smooth;
    transition: background 0.3s, color 0.3s;
}

a {
    color: #1a73e8;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    text-decoration: underline;
}

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

/* 导航栏 - 毛玻璃效果 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: box-shadow 0.3s, background 0.3s;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    color: #1a73e8;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    color: #0f172a;
    transition: color 0.3s;
}

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

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: #334155;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #1e293b;
    padding: 4px;
}

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

.search-box input {
    padding: 8px 14px;
    border: 1px solid #cbd5e1;
    border-radius: 20px;
    font-size: 14px;
    outline: none;
    width: 200px;
    transition: width 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.search-box input:focus {
    border-color: #1a73e8;
    width: 260px;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

.search-box button {
    background: #1a73e8;
    color: white;
    border: none;
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.search-box button:hover {
    background: #1557b0;
    transform: scale(1.02);
}

/* 移动菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 2px solid #e2e8f0;
    padding: 16px 20px;
    z-index: 999;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.mobile-menu a {
    display: block;
    padding: 10px 0;
    font-size: 16px;
    border-bottom: 1px solid #f1f5f9;
    transition: color 0.2s, padding-left 0.2s;
}

.mobile-menu a:hover {
    color: #1a73e8;
    padding-left: 8px;
}

.mobile-menu a:last-child {
    border-bottom: none;
}

/* 面包屑 */
.breadcrumb {
    background: white;
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
    transition: background 0.3s;
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    gap: 8px;
    font-size: 14px;
    color: #64748b;
}

.breadcrumb li+li::before {
    content: '›';
    margin-right: 8px;
    color: #94a3b8;
}

.breadcrumb a {
    color: #1a73e8;
}

/* Banner - 渐变与毛玻璃 */
.banner {
    background: linear-gradient(135deg, #1a73e8 0%, #0f2b5c 100%);
    color: white;
    padding: 120px 0 80px;
    margin-top: 64px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.05) 0%, transparent 60%);
    animation: float 8s ease-in-out infinite;
}

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

.banner::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: #f8fafc;
    border-radius: 40px 40px 0 0;
}

.banner h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.banner p {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 32px;
    opacity: 0.9;
}

.banner .buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.banner .btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

.btn-primary {
    background: white;
    color: #1a73e8;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn-primary:hover {
    background: #f1f5f9;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    text-decoration: none;
}

.btn-outline {
    border: 2px solid white;
    color: white;
    background: transparent;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    text-decoration: none;
}

.banner-slide {
    display: none;
}

.banner-slide.active {
    display: block;
    animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
    position: relative;
    z-index: 1;
}

.banner-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s;
}

.banner-dots span.active {
    background: white;
    width: 30px;
    border-radius: 5px;
}

/* 通用标题 */
.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 12px;
    transition: color 0.3s;
}

.section-title p {
    font-size: 18px;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

/* 品牌介绍 - 毛玻璃卡片 */
.brand-intro {
    background: white;
    padding: 80px 0;
    transition: background 0.3s;
}

.brand-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.brand-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #0f172a;
    transition: color 0.3s;
}

.brand-text p {
    margin-bottom: 16px;
    font-size: 16px;
    color: #334155;
    transition: color 0.3s;
}

.brand-text .info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 24px;
}

.brand-text .info-item {
    background: #f1f5f9;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    transition: background 0.3s, transform 0.2s;
}

.brand-text .info-item:hover {
    transform: translateY(-2px);
}

.brand-text .info-item strong {
    display: block;
    color: #1a73e8;
    margin-bottom: 4px;
}

.brand-svg {
    text-align: center;
}

.brand-svg svg {
    max-width: 100%;
    height: auto;
}

/* 产品优势 - 圆角卡片 + hover动画 */
.products {
    background: #f1f5f9;
    padding: 80px 0;
    transition: background 0.3s;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.98);
}

.product-card svg {
    margin-bottom: 16px;
    transition: transform 0.3s;
}

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

.product-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #0f172a;
    transition: color 0.3s;
}

.product-card p {
    font-size: 15px;
    color: #475569;
    transition: color 0.3s;
}

/* 解决方案 */
.solutions {
    background: white;
    padding: 80px 0;
    transition: background 0.3s;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.solution-card {
    background: #f8fafc;
    border-radius: 16px;
    padding: 32px;
    border-left: 4px solid #1a73e8;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

.solution-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.solution-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #0f172a;
    transition: color 0.3s;
}

.solution-card p {
    font-size: 15px;
    color: #475569;
    margin-bottom: 12px;
    transition: color 0.3s;
}

.solution-card .tag {
    display: inline-block;
    background: #dbeafe;
    color: #1a73e8;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 13px;
    margin-right: 6px;
    margin-bottom: 6px;
    transition: background 0.2s, transform 0.2s;
}

.solution-card .tag:hover {
    background: #bfdbfe;
    transform: scale(1.05);
}

/* 行业应用 */
.industry {
    background: #f1f5f9;
    padding: 80px 0;
    transition: background 0.3s;
}

.industry-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.industry-item {
    background: white;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

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

.industry-item svg {
    transition: transform 0.3s;
}

.industry-item:hover svg {
    transform: scale(1.15);
}

.industry-item h4 {
    font-size: 16px;
    margin-top: 12px;
    color: #0f172a;
    transition: color 0.3s;
}

.industry-item p {
    font-size: 14px;
    color: #64748b;
    margin-top: 6px;
    transition: color 0.3s;
}

/* 客户案例 */
.cases {
    background: white;
    padding: 80px 0;
    transition: background 0.3s;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: #f8fafc;
    border-radius: 16px;
    padding: 28px;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

.case-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.case-card .quote {
    font-style: italic;
    color: #334155;
    margin-bottom: 16px;
    font-size: 15px;
    transition: color 0.3s;
}

.case-card .author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.case-card .author svg {
    border-radius: 50%;
    transition: transform 0.3s;
}

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

.case-card .author div strong {
    display: block;
    font-size: 14px;
    color: #0f172a;
    transition: color 0.3s;
}

.case-card .author div span {
    font-size: 13px;
    color: #64748b;
    transition: color 0.3s;
}

/* 文章 */
.articles {
    background: #f1f5f9;
    padding: 80px 0;
    transition: background 0.3s;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.article-card {
    background: white;
    border-radius: 16px;
    padding: 28px;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.article-card .meta {
    font-size: 13px;
    color: #94a3b8;
    margin-bottom: 8px;
}

.article-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #0f172a;
    transition: color 0.3s;
}

.article-card p {
    font-size: 15px;
    color: #475569;
    margin-bottom: 12px;
    transition: color 0.3s;
}

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

.article-card:hover .read-more {
    letter-spacing: 1px;
}

/* FAQ */
.faq {
    background: white;
    padding: 80px 0;
    transition: background 0.3s;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color 0.3s;
}

.faq-item:hover {
    border-color: #1a73e8;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    cursor: pointer;
    background: #f8fafc;
    font-weight: 600;
    font-size: 16px;
    color: #0f172a;
    transition: background 0.2s, color 0.3s;
}

.faq-question:hover {
    background: #e2e8f0;
}

.faq-question .icon {
    font-size: 20px;
    transition: transform 0.3s, color 0.3s;
    color: #1a73e8;
}

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

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    background: white;
}

.faq-item.open .faq-answer {
    padding: 18px 24px;
    max-height: 800px;
}

.faq-answer p {
    font-size: 15px;
    color: #475569;
    margin-bottom: 8px;
    transition: color 0.3s;
}

/* HowTo */
.howto {
    background: #f1f5f9;
    padding: 80px 0;
    transition: background 0.3s;
}

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

.step {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 16px;
    padding: 24px;
    align-items: flex-start;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.step:hover {
    transform: translateX(6px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    background: rgba(255, 255, 255, 0.98);
}

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

.step:hover .step-num {
    transform: scale(1.1);
}

.step-content h4 {
    font-size: 18px;
    margin-bottom: 6px;
    color: #0f172a;
    transition: color 0.3s;
}

.step-content p {
    font-size: 15px;
    color: #475569;
    transition: color 0.3s;
}

/* 新闻 */
.news {
    background: white;
    padding: 80px 0;
    transition: background 0.3s;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: #f8fafc;
    border-radius: 12px;
    padding: 24px;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

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

.news-card .date {
    font-size: 13px;
    color: #94a3b8;
    margin-bottom: 8px;
}

.news-card h3 {
    font-size: 17px;
    margin-bottom: 8px;
    color: #0f172a;
    transition: color 0.3s;
}

.news-card p {
    font-size: 14px;
    color: #475569;
    transition: color 0.3s;
}

/* 联系我们 */
.contact {
    background: #f1f5f9;
    padding: 80px 0;
    transition: background 0.3s;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #0f172a;
    transition: color 0.3s;
}

.contact-info p {
    font-size: 15px;
    color: #475569;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: color 0.3s;
}

.contact-info svg {
    flex-shrink: 0;
}

.contact-form {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.contact-form:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.contact-form label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: #334155;
    transition: color 0.3s;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 15px;
    margin-bottom: 16px;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s, background 0.3s, color 0.3s;
}

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

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

.contact-form button {
    background: #1a73e8;
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
}

.contact-form button:hover {
    background: #1557b0;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

/* 底部 */
footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 48px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-bottom: 32px;
}

.footer-col h4 {
    color: white;
    font-size: 16px;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    color: #94a3b8;
    font-size: 14px;
    margin-bottom: 8px;
    transition: color 0.2s, padding-left 0.2s;
}

.footer-col a:hover {
    color: white;
    padding-left: 4px;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 14px;
}

.footer-bottom a {
    color: #94a3b8;
    transition: color 0.2s;
}

.footer-bottom a:hover {
    color: white;
}

/* 回到顶部 */
.back-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 48px;
    height: 48px;
    background: #1a73e8;
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: none;
    z-index: 999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
}

.back-top:hover {
    background: #1557b0;
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

/* 暗黑模式切换 */
.dark-mode-toggle {
    position: fixed;
    bottom: 100px;
    right: 40px;
    width: 48px;
    height: 48px;
    background: #1e293b;
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
}

.dark-mode-toggle:hover {
    background: #0f172a;
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

/* 暗黑模式 */
body.dark {
    background: #0f172a;
    color: #e2e8f0;
}

body.dark .navbar {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom-color: rgba(30, 41, 59, 0.6);
}

body.dark .logo span {
    color: #e2e8f0;
}

body.dark .nav-links a {
    color: #94a3b8;
}

body.dark .nav-links a:hover {
    color: #60a5fa;
}

body.dark .breadcrumb {
    background: #0f172a;
    border-bottom-color: #1e293b;
}

body.dark .breadcrumb a {
    color: #60a5fa;
}

body.dark .brand-intro {
    background: #0f172a;
}

body.dark .brand-text .info-item {
    background: #1e293b;
    color: #e2e8f0;
}

body.dark .products {
    background: #0f172a;
}

body.dark .product-card {
    background: rgba(30, 41, 59, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-color: rgba(51, 65, 85, 0.5);
}

body.dark .product-card h3 {
    color: #e2e8f0;
}

body.dark .product-card p {
    color: #94a3b8;
}

body.dark .solutions {
    background: #0f172a;
}

body.dark .solution-card {
    background: #1e293b;
}

body.dark .solution-card h3 {
    color: #e2e8f0;
}

body.dark .solution-card p {
    color: #94a3b8;
}

body.dark .industry {
    background: #0f172a;
}

body.dark .industry-item {
    background: #1e293b;
}

body.dark .industry-item h4 {
    color: #e2e8f0;
}

body.dark .industry-item p {
    color: #94a3b8;
}

body.dark .cases {
    background: #0f172a;
}

body.dark .case-card {
    background: #1e293b;
}

body.dark .case-card .quote {
    color: #cbd5e1;
}

body.dark .case-card .author div strong {
    color: #e2e8f0;
}

body.dark .case-card .author div span {
    color: #94a3b8;
}

body.dark .articles {
    background: #0f172a;
}

body.dark .article-card {
    background: #1e293b;
}

body.dark .article-card h3 {
    color: #e2e8f0;
}

body.dark .article-card p {
    color: #94a3b8;
}

body.dark .faq {
    background: #0f172a;
}

body.dark .faq-item {
    border-color: #1e293b;
}

body.dark .faq-question {
    background: #1e293b;
    color: #e2e8f0;
}

body.dark .faq-answer {
    background: #0f172a;
}

body.dark .faq-answer p {
    color: #94a3b8;
}

body.dark .howto {
    background: #0f172a;
}

body.dark .step {
    background: rgba(30, 41, 59, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-color: rgba(51, 65, 85, 0.5);
}

body.dark .step-content h4 {
    color: #e2e8f0;
}

body.dark .step-content p {
    color: #94a3b8;
}

body.dark .news {
    background: #0f172a;
}

body.dark .news-card {
    background: #1e293b;
}

body.dark .news-card h3 {
    color: #e2e8f0;
}

body.dark .news-card p {
    color: #94a3b8;
}

body.dark .contact {
    background: #0f172a;
}

body.dark .contact-form {
    background: rgba(30, 41, 59, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: rgba(51, 65, 85, 0.5);
}

body.dark .contact-form input,
body.dark .contact-form textarea {
    background: #0f172a;
    border-color: #1e293b;
    color: white;
}

body.dark .contact-form label {
    color: #94a3b8;
}

body.dark .section-title h2 {
    color: #e2e8f0;
}

body.dark .section-title p {
    color: #94a3b8;
}

body.dark .brand-text h2 {
    color: #e2e8f0;
}

body.dark .brand-text p {
    color: #cbd5e1;
}

body.dark .contact-info h3 {
    color: #e2e8f0;
}

body.dark .contact-info p {
    color: #94a3b8;
}

body.dark .mobile-menu {
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom-color: #1e293b;
}

body.dark .mobile-menu a {
    color: #94a3b8;
    border-bottom-color: #1e293b;
}

body.dark .mobile-menu a:hover {
    color: #60a5fa;
}

/* 滚动动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式布局 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .search-box input {
        width: 140px;
    }

    .search-box input:focus {
        width: 180px;
    }

    .banner {
        padding: 100px 0 60px;
    }

    .banner h1 {
        font-size: 32px;
    }

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

    .banner::after {
        height: 30px;
        border-radius: 30px 30px 0 0;
    }

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

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

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

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

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

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

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

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

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

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

    .back-top {
        right: 20px;
        bottom: 20px;
        width: 44px;
        height: 44px;
        font-size: 20px;
    }

    .dark-mode-toggle {
        right: 20px;
        bottom: 76px;
        width: 44px;
        height: 44px;
        font-size: 18px;
    }

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

    .section-title p {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: 1fr;
    }

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

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

    .banner h1 {
        font-size: 26px;
    }

    .banner .buttons {
        flex-direction: column;
        align-items: center;
    }

    .banner .btn {
        width: 80%;
        text-align: center;
    }

    .search-box input {
        width: 100px;
    }

    .search-box input:focus {
        width: 140px;
    }

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

    .step-num {
        margin-bottom: 8px;
    }
}