* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    scroll-behavior: smooth;
}

:root {
    --primary: #003366;
    --primary-light: #004a8f;
    --dark: #111827;
    --gray: #4b5563;
    --light: #f3f4f6;
    --white: #ffffff;
    --border: #d1d5db;
}

body {
    color: var(--dark);
    background: var(--white);
    line-height: 1.7;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 头部联系方式样式 */
.header-contact {
    background: var(--primary);
    color: var(--white);
    padding: 8px 0;
    font-size: 14px;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-contact-inner {
    display: flex;
    justify-content: flex-end;
    gap: 24px;
    align-items: center;
}

.header-contact-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-contact-item i {
    font-size: 16px;
}

/* Navigation */
header {
    border-bottom: 1px solid var(--border);
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 99;
    transition: all 0.3s ease;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.logo-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.4px;
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

/* 下拉菜单样式 */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
}

.dropdown-toggle::after {
    content: '▼';
    font-size: 10px;
    transition: transform 0.2s ease;
}

.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    /* 下拉菜单与主菜单间距10px */
    left: 0;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    padding: 8px 0;
}

/* 下拉菜单三角箭头 */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 20px;
    width: 14px;
    height: 14px;
    background: var(--white);
    border-left: 1px solid var(--border);
    border-top: 1px solid var(--border);
    transform: rotate(45deg);
    z-index: -1;
}

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

.dropdown-item {
    display: block;
    padding: 10px 16px;
    font-size: 14px;
    color: var(--dark);
    transition: background 0.2s ease;
}

.dropdown-item:hover {
    background: var(--light);
    color: var(--primary);
}

.language-switcher {
    position: relative;
    display: inline-block;
}

.language-dropdown {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.language-dropdown img {
    width: 20px;
    height: 20px;
    border-radius: 2px;
}

.language-dropdown span {
    font-size: 14px;
    font-weight: 500;
    color: var(--white);
}

.language-dropdown::after {
    content: '▼';
    font-size: 10px;
    margin-left: 4px;
    transition: transform 0.2s ease;
}

.language-dropdown.active::after {
    transform: rotate(180deg);
}

.language-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 120px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

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

.language-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    cursor: pointer;
    transition: background 0.2s ease;
    border-bottom: 1px solid var(--light);
}

.language-option:last-child {
    border-bottom: none;
}

.language-option:hover {
    background: var(--light);
}

.language-option img {
    width: 20px;
    height: 20px;
    border-radius: 2px;
}

.language-option span {
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
}

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: var(--dark);
    position: relative;
    transition: color 0.25s ease;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--primary);
    transition: width 0.25s ease;
}

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

.nav-menu a.active {
    color: var(--primary);
    font-weight: 600;
}

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



/* Section */
.section {
    padding: 80px 0;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-alt {
    background: var(--light);
}

.section-title {
    margin-bottom: 48px;
    text-align: center;
}

.section-title h2 {
    font-size: 30px;
    color: var(--primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.section-title p {
    font-size: 16px;
    color: var(--gray);
    max-width: 680px;
    margin: 0 auto;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.grid-2.reverse {
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

/* Card Style */
.card {
    padding: 36px 32px;
    border: 1px solid var(--border);
    transition: all 0.25s ease;
}

.card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.card h3 {
    font-size: 18px;
    margin-bottom: 14px;
    color: var(--dark);
    font-weight: 600;
}

.card p {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.7;
}



/* Text Content */
.text-block h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--dark);
}

.text-block p {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 16px;
}


/* 联系表单样式 */
.contact-form-section {
    padding: 80px 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    background: var(--light);
    padding: 40px;
    border-radius: 8px;
}

.contact-info h3 {
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 30px;
    font-weight: 600;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-info-icon {
    font-size: 24px;
    color: var(--primary);
    margin-top: 4px;
}

.contact-info-content h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-info-content p {
    color: var(--gray);
    font-size: 15px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.contact-form h3 {
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 30px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 15px;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 51, 102, 0.1);
}

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

.form-btn {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-btn:hover {
    background: var(--primary-light);
}

.radio-group,
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.radio-label,
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 15px;
    color: var(--dark);
}

.radio-label input[type="radio"],
.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

.required {
    color: #e74c3c;
    margin-left: 4px;
}

/* Contact Bar */
.contact-bar {
    background: var(--primary);
    color: var(--white);
    padding: 50px 0;
}

.contact-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.contact-left h3 {
    font-size: 26px;
    margin-bottom: 8px;
}

.contact-left p {
    opacity: 0.9;
    font-size: 16px;
}

.contact-bar .btn {
    background: var(--white);
    color: var(--primary);
}

.contact-bar .btn:hover {
    background: #e0e0e0;
}

/* FAQ */
.faq-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: flex-start;
}

.faq-img img {
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    width: 100%;
    height: auto;
}

.faq-item {
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
}

.faq-question {
    font-size: 17px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 20px;
    transition: transform 0.25s ease;
}

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

.faq-answer {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.7;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer.show {
    max-height: 200px;
}

/* Footer */
footer {
    background: #0f1724;
    color: rgba(255, 255, 255, 0.75);
    padding: 60px 0 24px;
    font-size: 15px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 20px;
    font-weight: 500;
}

.footer-col p {
    margin-bottom: 10px;
    line-height: 1.7;
    transition: color 0.2s;
}

.footer-col p:hover {
    color: var(--white);
}

.copyright {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 992px) {
    .hero {
        height: 500px;
    }

    .hero-inner h1 {
        font-size: 40px;
    }

    .grid-2,
    .grid-2.reverse,
    .footer-grid,
    .grid-4,
    .faq-wrapper,
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .header-contact-inner {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hero {
        height: 460px;
    }

    .hero-inner h1 {
        font-size: 32px;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .header-contact {
        display: none;
    }

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

.mobile-menu-btn {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--primary);
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (min-width: 769px) {
    .mobile-menu-btn {
        display: none;
    }
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--white);
    z-index: 1000;
    overflow-y: auto;
    padding: 80px 20px 20px;
}

.mobile-nav.active {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-nav-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: var(--primary);
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav-item {
    border-bottom: 1px solid var(--border);
}

.mobile-nav-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    color: var(--text);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
}

.mobile-nav-parent {
    font-weight: 600;
    color: var(--primary);
    cursor: default;
    padding: 10px 0;
}

.mobile-dropdown-toggle {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--primary);
    cursor: pointer;
    padding: 10px;
}

.mobile-dropdown-menu {
    display: none;
    padding: 0 0 8px 0;
    list-style: none;
    flex-wrap: wrap;
    gap: 8px;
}

.mobile-dropdown-menu.active,
.mobile-dropdown-menu.mobile-dropdown-open {
    display: flex;
}

.mobile-dropdown-item {
    display: inline-block;
    padding: 6px 10px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
}

.mobile-dropdown-item:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.mobile-contact-info {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.mobile-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
    color: var(--text);
    font-size: 13px;
}

.mobile-contact-item i {
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.mobile-language {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.mobile-language-title {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 8px;
}

.mobile-language-options {
    display: flex;
    gap: 10px;
}

.mobile-language-btn {
    flex: 1;
    padding: 8px;
    border: 2px solid var(--border);
    border-radius: 6px;
    background: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
    text-decoration: none;
    color: var(--text);
    transition: all 0.3s ease;
}

.mobile-language-btn.active {
    border-color: var(--primary);
    background: var(--primary);
    color: var(--white);
}

.mobile-language-btn img {
    width: 20px;
    height: 14px;
    object-fit: cover;
    border-radius: 2px;
}

.page-hero {
    width: 100%;
    height: 320px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.page-hero-content h1 {
    font-size: 42px;
    margin-bottom: 12px;
    font-weight: 600;
}

.page-hero-content p {
    font-size: 16px;
    opacity: 0.9;
}
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 50px;
}

.pagination a,
.pagination span {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--gray);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
}

.pagination a:hover,
.pagination span.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}
.pagination a.prev,
.pagination a.next,
.pagination span.prev,
.pagination span.next {
    width: auto;
    padding: 0 16px;
}

.page-hero {
    width: 100%;
    height: 320px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.page-hero-content h1 {
    font-size: 42px;
    margin-bottom: 12px;
    font-weight: 600;
}

.breadcrumb {
    padding: 16px 0;
    background: var(--light);
    font-size: 14px;
}

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

.breadcrumb span {
    margin: 0 8px;
    color: var(--gray);
}