:root {
    --primary: #00317d;
    --primary-light: #456697;
    --primary-lighter: #eef1f6;
    --primary-dark: #00255e;
    --bg: #fafafa;
    --bg-alt: #eaecf0;
    --card: #ffffff;
    --border: #dce0e8;
    --border-soft: #ebeef3;
    --text: #1a2332;
    --text-secondary: #4d5d70;
    --text-muted: #8594aa;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 6px 16px rgba(0, 49, 125, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --radius: 6px;
    --radius-lg: 8px;
    --accent-orange: #e67e22;
    --accent-orange-dark: #d35400;
    --accent-red: #c0392b;
    --accent-green: #27ae60;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
a {
    text-decoration: none;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    background-image:
            radial-gradient(circle at 1px 1px, rgba(0,0,0,0.025) 1px, transparent 0);
    background-size: 24px 24px;
}
form, input, select, textarea, td, th {
    font-size: 15px;
}

/* ============ 导航栏 ============ */
.nav-container {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #ffffff;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 64px;
}

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

.logo img {
    height: 32px;
    width: auto;
    object-fit: contain;
    display: block;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    line-height: 32px;
}

.nav-links a,.nav-right a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform 0.2s ease;
}

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

.nav-links a:hover::after {
    transform: scaleX(1);
}

.purchase-btn ,.btn-blue{
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 8px 24px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.purchase-btn:hover ,.btn-blue:hover{
    background: #00255e;
    box-shadow: 0 2px 8px rgba(0, 49, 125, 0.2);
    border: none;
}
.btn-blue{
    line-height: inherit;
}
.default-section{
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}
/* ============ 面包屑 ============ */
.breadcrumb {
    padding: 20px 0 16px;
    font-size: 14px;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.breadcrumb span {
    margin: 0 8px;
}

.breadcrumb .current {
    color: var(--text);
    font-weight: 500;
}
/* ============ 通用容器 ============ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============ 网站底部 ============ */
.site-footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

.footer-main {
    background: #fff;
    border-bottom: 1px solid var(--border);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px;
    display: grid;
    grid-template-columns: 1.2fr 1fr 1.5fr 2fr;
    gap: 40px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 10px 20px;
}

.footer-links a {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.footer-contact p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.footer-contact span {
    color: var(--text);
    font-weight: 500;
    display: block;
}

.qr-grid {
    display: flex;
    gap: 16px;
}

.qr-item {
    text-align: center;
}

.qr-placeholder {
    width: 100px;
    height: 100px;
    background: var(--primary-lighter);
    border: 1px solid var(--border);
    border-radius: 4px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-placeholder svg {
    width: 36px;
    height: 36px;
    color: var(--primary-light);
    opacity: 0.5;
}

.qr-item span {
    font-size: 12px;
    color: var(--text-muted);
}

.footer-bottom {
    background: var(--bg);
    padding: 16px 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: var(--primary);
}
/* 友情链接行（通栏，内容与页面对齐 1200px） */
.footer-friendlinks {
    background: #fff;
    border-top: 1px solid var(--border);
}

.footer-friendlinks-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px 24px;
}

.footer-friendlinks-inner .fl-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-right: 4px;
}

.footer-friendlinks-inner a {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ============ 响应式 ============ */
@media (max-width: 1280px) {
}

@media (max-width: 1024px) {
    .contact-grid { grid-template-columns: 1fr; }
    .qrcode-grid { grid-template-columns: repeat(1, 1fr); }
    .footer-inner {
        grid-template-columns: repeat(1, 1fr);
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    nav { padding: 0 16px; }
    .container { padding: 24px 16px; }
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 32px 16px;
    }
    .links-grid { gap: 10px; }
    .contact-grid { grid-template-columns: 1fr; }
    .qrcode-grid { grid-template-columns: repeat(1, 1fr); }
    .qrcode-placeholder { width: 80px; height: 80px; }
}