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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #6366f1 100%);
    --dark-bg: #0f172a;
    --card-bg: rgba(255, 255, 255, 0.9);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.company-name {
    font-size: 26px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-item {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-item:hover {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.nav-item.active {
    color: #fff;
    background: var(--gradient-primary);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* PC端More下拉菜单 */
.nav-dropdown {
    position: relative;
}

.more-btn {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-size: 15px;
    font-weight: 600;
    padding: 10px 24px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.more-btn:hover {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    min-width: 240px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.news-detail-container img {
    max-width: 500px;
    border-radius: 12px;
}

.dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.dropdown-item {
    display: block;
    padding: 14px 20px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding-left: 24px;
}

.dropdown-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-color);
    font-weight: 600;
}

/* 移动端汉堡菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: var(--gradient-primary);
    border: none;
    cursor: pointer;
    padding: 12px;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.hamburger-line {
    width: 22px;
    height: 2.5px;
    background-color: #fff;
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 移动端侧边菜单 */
.mobile-sidebar {
    position: fixed;
    top: 0;
    right: -320px;
    width: 300px;
    height: 100vh;
    background: linear-gradient(180deg, #fff 0%, #f8fafc 100%);
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.15);
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1002;
    overflow-y: auto;
}

.mobile-sidebar.active {
    right: 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    background: var(--gradient-primary);
}

.sidebar-header .company-name {
    font-size: 22px;
    color: #fff;
    background: none;
    -webkit-text-fill-color: #fff;
}

.sidebar-close-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    font-size: 28px;
    color: #fff;
    cursor: pointer;
    padding: 8px 12px;
    line-height: 1;
    transition: all 0.3s;
    border-radius: 8px;
}

.sidebar-close-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    padding: 8px 0;
}

.sidebar-item {
    display: block;
    padding: 18px 28px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 500;
    transition: all 0.2s ease;
    border-left: 4px solid transparent;
}

.sidebar-item:hover {
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.sidebar-item.active {
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 600;
}

/* 侧边菜单遮罩层 */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1001;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 32px auto;
    padding: 0 24px;
}

/* Breadcrumb Navigation */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 14px;
}

.breadcrumb-item {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

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

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 600;
}

.breadcrumb-separator {
    color: var(--text-light);
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.section-content {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 48px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.6);
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    grid-auto-flow: dense;
}

.right-panel {
    min-width: 0;
    order: 2;
}

.left-panel {
    min-width: 0;
    order: 1;
}

.main-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -1px;
    line-height: 1.2;
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.sub-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 32px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sub-title::before {
    content: '';
    width: 4px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.description {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* News List */
.news-section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.news-section-title::before {
    content: '';
    width: 6px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 3px;
}

.news-list {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.news-item {
    padding: 18px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
    border-radius: 12px;
    margin-bottom: 8px;
}

.news-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.news-item:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateX(4px);
}

.news-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-date {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

/* Footer Styles */
.footer {
    background: var(--dark-bg);
    color: #fff;
    margin-top: 80px;
    padding: 80px 0 32px 0;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.footer::after {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.3) 0%, transparent 70%);
    border-radius: 50%;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    gap: 80px;
    position: relative;
    z-index: 1;
}

.footer-info {
    flex: 1;
}

.footer-title {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
}

.footer-contact {
    flex: 1;
}

.contact-item {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
    display: flex;
    align-items: center;
    gap: 12px;
}

.contact-label {
    font-weight: 600;
    color: var(--accent-color);
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 48px auto 0 auto;
    padding: 24px 24px 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 1;
}

.footer-bottom .sitemap-link {
    color: var(--accent-color);
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 500;
}

.footer-bottom .sitemap-link:hover {
    color: #fff;
    text-shadow: 0 0 20px rgba(6, 182, 212, 0.5);
}

.copyright {
    color: var(--text-light);
    font-size: 15px;
}

/* Tablet Styles */
@media (max-width: 1024px) {
    .header-container {
        padding: 0 20px;
    }

    .main-content {
        margin: 24px auto;
        padding: 0 20px;
    }

    .section-content {
        padding: 32px;
        gap: 32px;
        grid-template-columns: 1fr;
    }

    .right-panel {
        order: 2;
    }

    .left-panel {
        order: 1;
    }

    .main-title {
        font-size: 36px;
    }

    .section-title {
        font-size: 32px;
    }

    .sub-title {
        font-size: 20px;
    }

    .footer-container {
        flex-direction: column;
        gap: 40px;
        padding: 0 20px;
    }

    .footer-title {
        font-size: 28px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .header-container {
        height: auto;
        padding: 12px 16px;
    }

    .company-name {
        font-size: 20px;
    }

    .nav-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .main-content {
        margin: 16px auto;
        padding: 0 16px;
    }

    .section-content {
        padding: 24px;
        gap: 24px;
        border-radius: 20px;
        grid-template-columns: 1fr;
    }

    .right-panel {
        order: 2;
    }

    .left-panel {
        order: 1;
    }

    .breadcrumb {
        margin-bottom: 16px;
        font-size: 13px;
    }

    .main-title {
        font-size: 28px;
    }

    .section-title {
        font-size: 24px;
    }

    .news-section-title {
        font-size: 20px;
        margin-bottom: 16px;
    }

    .sub-title {
        font-size: 18px;
        margin-top: 24px;
    }

    .description {
        font-size: 15px;
    }

    .news-list {
        padding: 16px;
    }

    .news-item {
        padding: 14px;
    }

    .news-title {
        font-size: 15px;
    }

    .news-date {
        font-size: 13px;
    }

    .news-detail-container {
        padding: 16px;
    }

    .news-detail-container img {
        max-width: 300px;
    }

    .footer {
        padding: 48px 0 24px 0;
        margin-top: 48px;
    }

    .footer-title {
        font-size: 24px;
    }

    .footer-description {
        font-size: 14px;
    }

    .contact-item {
        font-size: 14px;
        margin-bottom: 16px;
    }

    .copyright {
        font-size: 13px;
    }

    /* News Detail Styles */
    .news-detail-container {
        background-color: var(--card-bg);
        backdrop-filter: blur(20px);
        border-radius: 20px;
        padding: 32px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    }

    .news-detail-header {
        border-bottom: 2px solid rgba(0, 0, 0, 0.05);
        padding-bottom: 20px;
        margin-bottom: 24px;
    }

    .news-detail-title {
        font-size: 28px;
        font-weight: 800;
        color: var(--text-primary);
        margin-bottom: 16px;
        line-height: 1.3;
    }

    .news-detail-meta {
        display: flex;
        gap: 16px;
        align-items: center;
        flex-wrap: wrap;
    }

    .news-detail-date {
        font-size: 14px;
        color: var(--text-light);
        font-weight: 500;
    }

    .news-detail-category {
        font-size: 13px;
        color: var(--primary-color);
        background: rgba(99, 102, 241, 0.1);
        padding: 6px 14px;
        border-radius: 20px;
        font-weight: 600;
    }

    .news-detail-content {
        margin-bottom: 32px;
    }

    .news-detail-paragraph {
        font-size: 16px;
        line-height: 1.9;
        color: var(--text-secondary);
        margin-bottom: 20px;
        text-align: justify;
    }

    .news-detail-subtitle {
        font-size: 22px;
        font-weight: 700;
        color: var(--text-primary);
        margin: 32px 0 16px 0;
    }

    .news-detail-footer {
        border-top: 2px solid rgba(0, 0, 0, 0.05);
        padding-top: 20px;
    }

    .back-link {
        display: inline-block;
        color: var(--primary-color);
        text-decoration: none;
        font-size: 16px;
        font-weight: 600;
        transition: all 0.3s;
        padding: 12px 24px;
        background: rgba(99, 102, 241, 0.1);
        border-radius: 12px;
    }

    .back-link:hover {
        background: var(--gradient-primary);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    }

    .left-panel .news-detail-container {
        background: none;
        box-shadow: none;
        padding: 0;
    }
}

/* Desktop News Detail Styles */
.news-detail-container {
    background-color: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 48px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.news-detail-header {
    border-bottom: 2px solid rgba(0, 0, 0, 0.05);
    padding-bottom: 24px;
    margin-bottom: 32px;
}

.news-detail-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.3;
}

.news-detail-meta {
    display: flex;
    gap: 20px;
    align-items: center;
}

.news-detail-date {
    font-size: 15px;
    color: var(--text-light);
    font-weight: 500;
}

.news-detail-category {
    font-size: 14px;
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 600;
}

.news-detail-content {
    margin-bottom: 40px;
}

.news-detail-paragraph {
    font-size: 17px;
    line-height: 2;
    color: var(--text-secondary);
    margin-bottom: 24px;
    text-align: justify;
}

.news-detail-subtitle {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 40px 0 20px 0;
}

.news-detail-footer {
    border-top: 2px solid rgba(0, 0, 0, 0.05);
    padding-top: 24px;
}

.back-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    padding: 12px 28px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 12px;
}

.back-link:hover {
    background: var(--gradient-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.left-panel .news-detail-container {
    background: none;
    box-shadow: none;
    padding: 0;
}