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

:root {
    --primary: #ff6b35;
    --primary-dark: #e55a2b;
    --secondary: #e94560;
    --accent: #0f3460;
    --bg-dark: #1a1a2e;
    --bg-light: #f8f9fa;
    --text-dark: #1a1a2e;
    --text-light: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --radius: 16px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

body.dark-mode {
    background: var(--bg-dark);
    color: var(--text-light);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary);
}

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font: inherit;
}

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

.section {
    padding: 80px 0;
}

h1, h2, h3, h4 {
    line-height: 1.3;
    margin-bottom: 0.5em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.25rem; }

/* 暗色模式覆盖 */
.dark-mode .section {
    background: transparent;
}

/* 头部导航 */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: background var(--transition);
}

body.dark-mode header {
    background: rgba(26, 26, 46, 0.98);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
}

.logo a {
    display: flex;
    align-items: center;
}

.logo svg {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: 28px;
}

.nav-menu a {
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    padding: 6px 0;
    position: relative;
    transition: color var(--transition);
}

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

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

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

.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.nav-actions button {
    color: rgba(255, 255, 255, 0.8);
    padding: 6px;
    border-radius: 50%;
    transition: background var(--transition), color var(--transition);
}

.nav-actions button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary);
}

.menu-toggle {
    display: none;
}

.search-bar {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.search-bar.active {
    max-height: 80px;
    padding: 12px 20px;
}

.search-bar input {
    width: 100%;
    padding: 10px 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: border var(--transition);
}

.search-bar input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.search-bar input:focus {
    border-color: var(--primary);
}

.search-close {
    margin-top: 8px;
    padding: 4px 16px;
    background: var(--primary);
    color: #fff;
    border-radius: 6px;
    font-size: 0.85rem;
    transition: background var(--transition);
}

.search-close:hover {
    background: var(--primary-dark);
}

/* 面包屑 */
.breadcrumb {
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li + li::before {
    content: '/';
    margin: 0 8px;
    color: rgba(255, 255, 255, 0.3);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
    color: var(--primary);
}

/* Hero Banner */
.hero-banner {
    position: relative;
    overflow: hidden;
    border-radius: 0 0 var(--radius) var(--radius);
}

.banner-slider {
    position: relative;
}

.slide {
    display: none;
    animation: fadeIn 0.8s ease;
}

.slide.active {
    display: block;
}

.slide svg {
    width: 100%;
    height: auto;
    display: block;
}

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

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

.banner-dots span.active {
    background: var(--primary);
    transform: scale(1.2);
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

/* 品牌介绍 */
.brand-intro {
    background: linear-gradient(135deg, var(--bg-light) 0%, #fff 100%);
}

.dark-mode .brand-intro {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #16213e 100%);
}

.brand-intro h1 {
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.lead {
    font-size: 1.1rem;
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.8;
}

/* 企业信息 */
.company-info {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    margin: 40px 20px;
    padding: 40px;
    box-shadow: var(--shadow);
}

.dark-mode .company-info {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
}

.company-info h2 {
    color: var(--primary);
}

.team-intro, .author-info {
    margin-top: 30px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.dark-mode .team-intro,
.dark-mode .author-info {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--glass-border);
}

/* 产品 */
.products {
    background: linear-gradient(135deg, #f0f2f5 0%, #e8ecf1 100%);
}

.dark-mode .products {
    background: linear-gradient(135deg, #0f3460 0%, #1a1a2e 100%);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.product-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform var(--transition), box-shadow var(--transition);
    text-align: center;
}

.dark-mode .product-card {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--glass-border);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.product-card svg {
    margin: 0 auto 20px;
}

.product-card h3 {
    color: var(--primary);
}

.product-card img {
    margin-top: 20px;
    border-radius: 12px;
    width: 100%;
    height: auto;
    transition: transform 0.5s ease;
}

.product-card:hover img {
    transform: scale(1.02);
}

/* 优势 */
.advantages {
    background: var(--bg-dark);
    color: var(--text-light);
}

.advantages h2 {
    color: var(--primary);
}

.advantages ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.advantages li {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform var(--transition), background var(--transition);
}

.advantages li:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.12);
}

.advantages li strong {
    color: var(--primary);
    display: block;
    margin-bottom: 8px;
    font-size: 1.1rem;
}

/* 服务 */
.services {
    background: linear-gradient(135deg, #e94560 0%, #ff6b35 100%);
    color: #fff;
}

.services h2 {
    text-align: center;
}

.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform var(--transition), background var(--transition);
}

.service-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.25);
}

.service-card svg {
    margin: 0 auto 16px;
}

.service-card h3 {
    color: #fff;
}

/* 核心优势与解决方案 */
.core-advantages {
    background: rgba(15, 52, 96, 0.05);
    border-radius: var(--radius);
    margin: 40px 20px;
    padding: 40px;
}

.dark-mode .core-advantages {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
}

.core-advantages h2 {
    color: var(--primary);
}

/* 应用行业 */
.industries {
    background: var(--bg-light);
}

.dark-mode .industries {
    background: var(--bg-dark);
}

.industries ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 30px;
}

.industries li {
    background: rgba(255, 255, 255, 0.6);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: transform var(--transition);
}

.dark-mode .industries li {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--glass-border);
}

.industries li:hover {
    transform: translateY(-4px);
}

/* 案例 */
.cases {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.dark-mode .cases {
    background: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
}

.case-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.case-list article {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform var(--transition);
}

.dark-mode .case-list article {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--glass-border);
}

.case-list article:hover {
    transform: translateY(-6px);
}

.case-list h3 {
    color: var(--primary);
}

/* 评价 */
.testimonials {
    background: var(--bg-dark);
    color: var(--text-light);
}

.testimonial-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.testimonial-cards blockquote {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    padding: 30px;
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    transition: transform var(--transition);
}

.testimonial-cards blockquote:hover {
    transform: translateY(-4px);
}

.testimonial-cards blockquote::before {
    content: '"';
    font-size: 3rem;
    position: absolute;
    top: 10px;
    left: 16px;
    color: var(--primary);
    opacity: 0.6;
}

.testimonial-cards p {
    font-style: italic;
    margin-bottom: 16px;
}

.testimonial-cards cite {
    font-style: normal;
    color: var(--primary);
    font-size: 0.9rem;
}

/* 新闻 */
.news {
    background: var(--bg-light);
}

.dark-mode .news {
    background: var(--bg-dark);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.article-grid article {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform var(--transition);
}

.dark-mode .article-grid article {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--glass-border);
}

.article-grid article:hover {
    transform: translateY(-4px);
}

.article-grid h3 {
    color: var(--primary);
    margin-bottom: 8px;
}

.date {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 12px;
}

.read-more {
    display: inline-block;
    margin-top: 12px;
    color: var(--primary);
    font-weight: 600;
    transition: color var(--transition);
}

.read-more:hover {
    color: var(--primary-dark);
}

.related-articles, .latest-updates {
    margin-top: 40px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
}

.dark-mode .related-articles,
.dark-mode .latest-updates {
    background: rgba(255, 255, 255, 0.04);
}

.related-articles ul, .latest-updates ul {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 12px;
}

.related-articles a {
    color: var(--primary);
}

.related-articles a:hover {
    text-decoration: underline;
}

/* FAQ */
.faq {
    background: linear-gradient(135deg, #0f3460 0%, #1a1a2e 100%);
    color: var(--text-light);
}

.faq h2 {
    color: var(--primary);
}

.faq-list {
    display: grid;
    gap: 16px;
    margin-top: 30px;
}

.faq-item {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 20px 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: background var(--transition);
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.12);
}

.faq-item h3 {
    color: var(--primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item h3::after {
    content: '+';
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-item.active h3::after {
    transform: rotate(45deg);
}

.faq-item div {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active div {
    max-height: 500px;
    padding-top: 16px;
}

/* HowTo */
.howto {
    background: var(--bg-light);
}

.dark-mode .howto {
    background: var(--bg-dark);
}

.howto-steps {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    margin-top: 30px;
}

.dark-mode .howto-steps {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
}

.howto-steps h3 {
    color: var(--primary);
    margin-top: 24px;
    margin-bottom: 12px;
}

.howto-steps ul, .howto-steps ol {
    padding-left: 24px;
    margin-bottom: 16px;
}

.howto-steps li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.howto-steps ol li {
    list-style: decimal;
}

.howto-steps ul li {
    list-style: disc;
}

/* 联系 */
.contact {
    background: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
    color: var(--text-light);
}

.contact h2 {
    color: var(--primary);
}

.contact-info {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-info p {
    margin-bottom: 12px;
    font-size: 1rem;
}

.qr-codes {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.qr-codes div {
    text-align: center;
}

.qr-codes svg {
    margin: 0 auto 8px;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.qr-codes span {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

/* 页脚 */
footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 20px 30px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-content h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

.footer-content ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-content a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition);
}

.footer-content a:hover {
    color: var(--primary);
}

.footer-legal {
    grid-column: 1 / -1;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    margin-top: 20px;
}

.footer-legal p {
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 1.5rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition), opacity var(--transition);
    opacity: 0;
    pointer-events: none;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    transform: translateY(-4px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(26, 26, 46, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero-banner svg {
        height: 300px;
    }

    .brand-intro h1 {
        font-size: 1.6rem;
    }

    .section {
        padding: 50px 0;
    }

    .product-grid, .case-list, .article-grid {
        grid-template-columns: 1fr;
    }

    .company-info {
        margin: 20px;
        padding: 20px;
    }

    .container {
        padding: 0 16px;
    }

    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    .hero-banner svg {
        height: 250px;
    }

    .nav-container {
        padding: 10px 16px;
    }

    .logo svg {
        height: 32px;
    }

    .service-cards {
        grid-template-columns: 1fr;
    }

    .advantages ul {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* 暗色模式按钮 */
.dark-mode-toggle svg {
    transition: fill var(--transition);
}

.dark-mode .dark-mode-toggle svg path {
    fill: #ffd700;
}

/* 搜索按钮 */
.search-toggle:hover svg {
    stroke: var(--primary);
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}