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

:root {
    --bg-primary: #fef7f0;
    --bg-secondary: #ffffff;
    --bg-hover: #fff5eb;
    --primary: #ff6b35;
    --primary-light: #ff8c5a;
    --primary-dark: #e55a2b;
    --secondary: #2d3436;
    --accent: #00b894;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --text-muted: #b2bec3;
    --border: #ffe0d0;
    --border-hover: #ffccba;
    --shadow-sm: 0 2px 8px rgba(255, 107, 53, 0.08);
    --shadow-md: 0 4px 16px rgba(255, 107, 53, 0.12);
    --shadow-lg: 0 8px 32px rgba(255, 107, 53, 0.15);
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.8;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

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

.company-name {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
}

.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: 6px;
    transition: all 0.25s ease;
}

.nav-item:hover {
    color: var(--primary);
    background: var(--bg-hover);
}

.nav-item.active {
    color: var(--bg-secondary);
    background: var(--primary);
    font-weight: 600;
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.more-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.more-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--bg-hover);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.25s ease;
    z-index: 1001;
}

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

.dropdown-item {
    display: block;
    padding: 12px 20px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    border-bottom: 1px solid var(--border);
}

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

.dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--primary);
    padding-left: 24px;
}

.dropdown-item.active {
    background: var(--bg-hover);
    color: var(--primary);
    font-weight: 600;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    cursor: pointer;
    padding: 10px;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    transition: all 0.25s ease;
}

.mobile-menu-btn:hover {
    border-color: var(--primary);
}

.hamburger-line {
    width: 20px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.25s ease;
}

/* Mobile Sidebar */
.mobile-sidebar {
    position: fixed;
    top: 0;
    right: -320px;
    width: 300px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transition: right 0.3s ease;
    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 var(--border);
    background: var(--bg-secondary);
}

.sidebar-header .company-name {
    font-size: 22px;
}

.sidebar-close-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px 12px;
    line-height: 1;
    transition: all 0.25s ease;
    border-radius: 6px;
}

.sidebar-close-btn:hover {
    background: var(--bg-hover);
    color: var(--primary);
    border-color: var(--primary);
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    padding: 12px 0;
}

.sidebar-item {
    display: block;
    padding: 14px 24px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.sidebar-item:hover {
    background: var(--bg-hover);
    color: var(--primary);
    border-left-color: var(--primary);
}

.sidebar-item.active {
    background: var(--bg-hover);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 600;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    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: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 28px 0 24px 0;
    font-size: 14px;
}

.breadcrumb-item {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.25s;
    font-weight: 500;
}

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

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

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

/* Section */
.section {
    display: none;
}

.section.active {
    display: block;
}

.section-content {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 32px;
    margin-bottom: 48px;
}

.left-panel,
.right-panel {
    min-width: 0;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 16px;
    padding: 56px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-md);
}

.left-panel .main-title,
.left-panel .section-title {
    color: var(--bg-secondary);
}

.main-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    line-height: 1.3;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    line-height: 1.4;
}

.description {
    font-size: 16px;
    line-height: 1.9;
    margin-bottom: 16px;
}

.left-panel .description {
    color: rgba(255, 255, 255, 0.95);
}

/* Sub Title */
.sub-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    margin: 36px 0 18px 0;
    padding-left: 16px;
    border-left: 4px solid var(--primary);
    position: relative;
}

/* Content Card */
.content-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.content-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.content-card .description {
    color: var(--text-secondary);
}

/* News Section */
.news-section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 18px;
    padding-left: 14px;
    border-left: 3px solid var(--primary);
}

.news-list {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    box-shadow: var(--shadow-sm);
}

.news-item {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    transition: all 0.25s ease;
    text-decoration: none;
    display: block;
    border-radius: 8px;
    margin-bottom: 6px;
}

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

.news-item:hover {
    background: var(--bg-hover);
    padding-left: 20px;
}

.news-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.6;
}

.news-date {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

/* Footer */
.footer {
    background: var(--secondary);
    border-top: 4px solid var(--primary);
    margin-top: 64px;
    padding: 56px 0 24px 0;
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    gap: 56px;
}

.footer-info {
    flex: 1;
}

.footer-title {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--primary);
}

.footer-description {
    font-size: 15px;
    line-height: 1.9;
    color: #b2bec3;
}

.footer-contact {
    flex: 1;
}

.contact-item {
    margin-bottom: 16px;
    font-size: 15px;
    line-height: 1.8;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.contact-label {
    font-weight: 700;
    color: var(--primary);
    min-width: 52px;
}

.contact-value {
    color: #b2bec3;
}

.footer-bottom {
    max-width: 1280px;
    margin: 32px auto 0 auto;
    padding: 20px 40px 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom .sitemap-link {
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 600;
}

.footer-bottom .sitemap-link:hover {
    opacity: 0.8;
}

.copyright {
    color: #636e72;
    font-size: 14px;
}

/* News Detail Styles */
.news-detail-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.news-detail-header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
    margin-bottom: 28px;
}

.news-detail-title {
    font-size: 30px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.4;
}

.news-detail-meta {
    display: flex;
    gap: 14px;
    align-items: center;
}

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

.news-detail-category {
    font-size: 13px;
    color: var(--primary);
    background: var(--bg-hover);
    padding: 5px 14px;
    border-radius: 20px;
    font-weight: 600;
}

.news-detail-content {
    margin-bottom: 36px;
}

.news-detail-paragraph {
    font-size: 16px;
    line-height: 2;
    color: var(--text-secondary);
    margin-bottom: 20px;
    text-align: justify;
}

.news-detail-subtitle {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 32px 0 16px 0;
}

.news-detail-footer {
    border-top: 1px solid var(--border);
    padding-top: 20px;
}

.back-link {
    display: inline-block;
    color: var(--bg-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s;
    padding: 11px 24px;
    background: var(--primary);
    border-radius: 6px;
}

.back-link:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

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

.left-panel .news-detail-container .news-detail-title {
    color: var(--text-primary);
}

.left-panel .news-detail-container .news-detail-paragraph {
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
    .header-container,
    .main-content {
        padding: 0 28px;
    }

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

    .right-panel {
        order: 2;
    }

    .left-panel {
        order: 1;
    }

    .hero-section {
        padding: 44px;
    }

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

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

    .sub-title {
        font-size: 22px;
    }

    .footer-container {
        flex-direction: column;
        gap: 32px;
        padding: 0 28px;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 14px;
        text-align: center;
        padding: 20px 28px 0 28px;
    }
}

@media (max-width: 768px) {
    .header-container {
        height: auto;
        padding: 14px;
    }

    .company-name {
        font-size: 22px;
    }

    .nav-menu {
        display: none;
    }

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

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

    .section-content {
        gap: 20px;
    }

    .breadcrumb {
        margin: 20px 0 18px 0;
        font-size: 13px;
    }

    .hero-section {
        padding: 32px 24px;
        border-radius: 12px;
    }

    .main-title {
        font-size: 30px;
        margin-bottom: 16px;
    }

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

    .news-section-title {
        font-size: 18px;
        margin-bottom: 14px;
    }

    .sub-title {
        font-size: 20px;
        margin-top: 28px;
    }

    .description {
        font-size: 15px;
    }

    .news-list {
        padding: 12px;
    }

    .news-item {
        padding: 12px;
    }

    .news-title {
        font-size: 14px;
    }

    .news-date {
        font-size: 12px;
    }

    .news-detail-container {
        padding: 24px;
    }

    .news-detail-container img {
        max-width: 100%;
    }

    .news-detail-title {
        font-size: 24px;
        margin-bottom: 14px;
    }

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

    .news-detail-category {
        font-size: 12px;
        padding: 4px 12px;
    }

    .news-detail-paragraph {
        font-size: 15px;
        line-height: 1.9;
        margin-bottom: 18px;
    }

    .news-detail-subtitle {
        font-size: 20px;
        margin: 28px 0 14px 0;
    }

    .back-link {
        font-size: 14px;
        padding: 10px 20px;
    }

    .footer {
        padding: 40px 0 20px 0;
        margin-top: 48px;
    }

    .footer-title {
        font-size: 22px;
    }

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

    .contact-item {
        font-size: 14px;
        margin-bottom: 12px;
    }

    .copyright {
        font-size: 13px;
    }

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