/* ========== 公共样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}

body {
    background-color: #ffffff;
    color: #1e2b3c;
    line-height: 1.5;
    overflow-x: hidden;
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 固定顶部导航 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    z-index: 1000;
    transition: all 0.3s;
    border-bottom: 1px solid rgba(0,40,80,0.05);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 600;
    background: linear-gradient(135deg, #0A2540 0%, #1F3A5F 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}
.logo span {
    font-size: 0.9rem;
    color: #C6A43F;
    font-weight: 400;
    margin-left: 6px;
    -webkit-text-fill-color: #C6A43F;
    background: none;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    font-weight: 500;
    color: #1e2b3c;
}
.nav-menu a {
    position: relative;
    padding: 4px 0;
    font-size: 0.95rem;
    transition: 0.2s;
}
.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0%;
    height: 2px;
    background: #C6A43F;
    transition: 0.25s;
}
.nav-menu a:hover::after {
    width: 100%;
}
.nav-menu a:hover {
    color: #0A2540;
}

@media (max-width: 992px) {
    .site-header {
        position: relative;
    }
    .header-inner {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 0;
    }
    .nav-menu {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem 1.5rem;
        justify-content: flex-end;
        margin-top: 8px;
        width: 100%;
    }
}

/* 底部样式 */
.site-footer {
    background: #0A2540;
    color: #e0e7ef;
    padding: 56px 0 32px;
    margin-top: 60px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
}
.footer-col p, .footer-col a {
    color: #b0c4d9;
    font-size: 0.95rem;
    line-height: 1.8;
}
.footer-col a:hover {
    color: #C6A43F;
}
.footer-logo {
    font-size: 1.8rem;
    font-weight: 600;
    color: white;
    margin-bottom: 16px;
}
.footer-logo small {
    font-size: 0.9rem;
    color: #C6A43F;
}
.qr-code img {
    width: 120px;
    height: 120px;
    background: #fff;
    padding: 6px;
    border-radius: 8px;
    margin-top: 8px;
}
.footer-nav a {
    display: block;
    margin-bottom: 8px;
}
.copyright {
    border-top: 1px solid #1f3a5f;
    margin-top: 48px;
    padding-top: 24px;
    text-align: center;
    color: #8ea3bb;
    font-size: 0.9rem;
}
.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 24px;
    justify-content: center;
    margin-bottom: 16px;
}
.friend-links a {
    color: #b0c4d9;
}

/* 通用板块间距 */
.section {
    padding: 80px 0;
}
.section-title {
    font-size: 2.2rem;
    font-weight: 600;
    color: #0A2540;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}
.section-subtitle {
    color: #5f6c80;
    font-size: 1.1rem;
    max-width: 700px;
    margin-bottom: 48px;
    border-left: 4px solid #C6A43F;
    padding-left: 20px;
}
.gold-text {
    color: #C6A43F;
}

/* 按钮 */
.btn-outline {
    border: 1px solid #C6A43F;
    background: transparent;
    color: #0A2540;
    padding: 8px 28px;
    border-radius: 40px;
    font-weight: 500;
    transition: 0.3s;
    display: inline-block;
}
.btn-outline:hover {
    background: #C6A43F;
    color: white;
}

/* 滚动淡入特效 */
.fade-in-section {

    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}