/* 全局样式重置与基础变量定义 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}



:root {
    --color-primary: #1A365D;
    --color-secondary: #E0E2E5;
    --color-accent: #F59E0B;
    --color-dark: #222222;
    --color-light: #FFFFFF;
    --color-gray-light: #F8F9FA;
    --color-border: #E5E7EB;
    --color-danger: #DC2626;
    --color-warning: #F59E0B;
    --color-success: #10B981;
    --color-text-secondary: #4B5563; /* 提升对比度至AAA级 */

    --font-family-cn: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
    --font-size-h1: 36px;
    --font-size-h2: 28px;
    --font-size-h3: 24px;
    --font-size-h4: 20px;
    --font-size-h5: 18px;
    --font-size-body: 16px;
    --font-size-small: 14px;
    --spacing-xl: 80px;
    --spacing-lg: 40px;
    --spacing-md: 20px;
    --spacing-sm: 16px;
    --spacing-xs: 12px;
    --spacing-xxs: 8px;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-family-cn);
    font-size: var(--font-size-body);
    color: var(--color-dark);
    background-color: var(--color-light);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.4;
}
a {
    text-decoration: none;
    transition: all 0.2s ease;
}
img {
    max-width: 100%;
   
    display: block;
}
ul, ol {
    padding-left: 24px;
    margin-bottom: var(--spacing-md);
}
li {
    margin-bottom: var(--spacing-xxs);
}
p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    color: var(--color-text-secondary);
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}
/* 按钮规范 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: var(--font-size-body);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    height: 48px;
    min-width: 160px;
    gap: var(--spacing-xxs);
    font-family: var(--font-family-cn);
}
.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-light);
}
.btn-primary:hover {
    background-color: #E68A00;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.25);
}
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    height: 48px;
}
.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-light);
    transform: translateY(-2px);
}
.btn-text {
    background: transparent;
    border: none;
    color: var(--color-primary);
    padding: 8px 0;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-family-cn);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.btn-text:hover {
    color: var(--color-accent);
    transform: translateX(3px);
}
/* 头部导航 */
header {
    background-color: var(--color-primary);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px var(--spacing-md);
}
.logo {
    display: flex;
    align-items: center;
    color: var(--color-light);
    font-size: 24px;
    font-weight: 700;
}
.logo span {
    color: var(--color-accent);
}
.nav-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}
.main-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    margin: 0;
    padding: 0;
}
.main-menu li {
    position: relative;
}
.main-menu > li > a {
    color: rgba(255, 255, 255, 0.95);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    font-size: var(--font-size-body);
}
.main-menu > li > a.active,
.main-menu > li > a:hover {
    color: var(--color-light);
}
.main-menu > li > a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
}
/* 多级下拉菜单 */
.dropdown {
    position: relative;
}
.dropdown-content {
    position: absolute;
    top: calc(100% + 10px);
    left: -20px;
    min-width: 220px;
    background-color: var(--color-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 100;
    padding: var(--spacing-sm) 0;
}
.dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-content a {
    display: block;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.2s ease;
}
.dropdown-content a:last-child {
    border-bottom: none;
}
.dropdown-content a:hover {
    color: var(--color-accent);
    padding-left: 28px;
}
/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--color-light);
    cursor: pointer;
    padding: 8px;
}
.header-cta .phone-number {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--color-light);
    padding: 10px 18px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.header-cta .phone-number:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: var(--color-accent);
}
/* 面包屑导航 */
.breadcrumb {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-small);
}
.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}
.breadcrumb a:hover {
    color: var(--color-accent);
}
.breadcrumb span {
    margin: 0 6px;
    color: rgba(255, 255, 255, 0.6);
}
/* 板块标题 */
.section-title {
    margin-bottom: var(--spacing-lg);
    text-align: center;
    padding-top: var(--spacing-xs);
}
.section-title h2 {
    font-size: var(--font-size-h2);
    position: relative;
    padding-bottom: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    display: inline-block;
}
.section-title h2 span{
    color:var(--color-accent);
    font-weight:800;
padding:0.5rem 0.2rem;
}
.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
}
.section-title p {
    opacity: 0.8;
    font-size: 16px;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
    color: var(--color-text-secondary);
}
/* 通用内容区块 */
.content-section {
    padding: var(--spacing-xl) 0;
}
/* 统计卡片（仅布局，具体背景由页面样式定义） */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}
.stat-card {
    text-align: center;
}
.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-xxs);
}
.stat-desc {
    font-size: 16px;
    color: var(--color-dark);
    font-weight: 500;
    margin: 0;
}
/* 响应式调整 */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stat-number {
        font-size: 36px;
    }
}
/* 警告/提示框 */
.warning-box {
    padding: var(--spacing-md);
    background-color: rgba(245, 158, 11, 0.08);
    border-left: 4px solid var(--color-warning);
    border-radius: 4px;
    margin: var(--spacing-md) 0;
}
.warning-box h4 {
    color: var(--color-warning);
    font-size: 16px;
    margin: 0 0 var(--spacing-xxs);
}
.warning-box p {
    margin: 0;
}
.danger-box {
    padding: var(--spacing-md);
    background-color: rgba(220, 38, 38, 0.08);
    border-left: 4px solid var(--color-danger);
    border-radius: 4px;
    margin: var(--spacing-md) 0;
}
.danger-box h4 {
    color: var(--color-danger);
    font-size: 16px;
    margin: 0 0 var(--spacing-xxs);
}
.danger-box p {
    margin: 0;
}
.success-box {
    padding: var(--spacing-md);
    background-color: rgba(16, 185, 129, 0.08);
    border-left: 4px solid var(--color-success);
    border-radius: 4px;
    margin: var(--spacing-md) 0;
}
.success-box h4 {
    color: var(--color-success);
    font-size: 16px;
    margin: 0 0 var(--spacing-xxs);
}
.success-box p {
    margin: 0;
}
/* CTA区域 */
.cta-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-primary);
    color: var(--color-light);
    text-align: center;
    margin-top: var(--spacing-xl);
}
.cta-content h2 {
    color: var(--color-light);
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-sm);
    border: none;
    padding: 0;
}
.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}
.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}
/* 页脚 */
footer {
    background-color: var(--color-primary);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}
.footer-content {
    display: grid;
    grid-template-columns: 3fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}
.footer-logo {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-light);
    margin-bottom: var(--spacing-md);
}
.footer-logo span {
    color: var(--color-accent);
}
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}
.contact-item i {
    color: var(--color-accent);
    width: 20px;
    margin-top: 2px;
}
.footer-links h3 {
    color: var(--color-light);
    font-size: 16px;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-xs);
}
.footer-links h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--color-accent);
}
.footer-links ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
.footer-links li {
    margin-bottom: var(--spacing-xs);
}
.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    display: inline-block;
}
.footer-links a:hover {
    color: var(--color-accent);
    transform: translateX(5px);
}
.copyright {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: var(--font-size-small);
    opacity: 0.5;
    margin-top: var(--spacing-md);
}
/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    color: var(--color-light);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.back-to-top:hover {
    background-color: var(--color-accent);
}
/* 响应式 */
@media (max-width: 1280px) {
    .container {
        max-width: 1100px;
    }
}
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    :root {
        --spacing-xl: 60px;
        --spacing-lg: 30px;
    }
}
@media (max-width: 900px) {
    .stats-grid {
        gap: var(--spacing-md);
    }
}
@media (max-width: 768px) {
    :root {
        --font-size-h1: 28px;
        --font-size-h2: 24px;
        --spacing-xl: 50px;
        --spacing-lg: 30px;
    }
    .main-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--color-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        gap: 0;
    }
    .main-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .main-menu li {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding: var(--spacing-xs) 0;
    }
    .main-menu > li > a {
        display: block;
        padding: var(--spacing-sm) 0;
    }
    /* 移动端二级导航 */
    .dropdown-content {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background-color: rgba(255, 255, 255, 0.05);
        margin-left: var(--spacing-sm);
        margin-top: var(--spacing-xs);
        border-radius: 4px;
        display: none;
    }
    .dropdown.active .dropdown-content {
        display: block;
    }
    .dropdown > a::after {
        content: '\f107';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        margin-left: 6px;
        font-size: 12px;
    }
    .dropdown.active > a::after {
        content: '\f106';
    }
    .mobile-menu-btn {
        display: block;
    }
    .header-cta {
        display: none;
    }
    .footer-content {
        grid-template-columns: 1fr;
    }
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    .cta-buttons .btn {
        width: 100%;
    }
}
@media (max-width: 480px) {
    .stat-number {
        font-size: 28px;
    }
}