:root {
    --fd-blue: #004ea2;
    --fd-red: #8B0012;
    --light-gray: #f8f9fa;
}

body {
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    color: #333;
    background-color: #fcfcfc;
}

/* 导航栏覆盖 */
.navbar {
    background-color: var(--fd-blue) !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.2rem;
}

.nav-link {
    font-size: 1rem;
    margin-left: 1rem;
}

.nav-link.active {
    font-weight: bold;
    border-bottom: 2px solid white;
}

/* Banner 区域 */
.banner-section {
    height: 400px;
    background-size: 100% 100%;
    background-position: center;
    position: relative;
    margin-top: 56px;
    background-image: url('../img/banner1.png');
    /* Navbar height compensation if fixed */
}

@media (max-width: 768px) {
    .banner-section {
        background-image: url('../img/banner1.png');
        height: auto;
        padding: 4rem 0;
    }

    .banner-section h1 {
        font-size: 1.8rem;
        /* Adjust font size for mobile */
    }

    .banner-section .lead {
        font-size: 1rem;
    }
}

/* 遮罩层，让文字更清晰 - 已移除，恢复原图颜色 */
.banner-section::before {
    display: none;
}

.banner-content {
    position: relative;
    z-index: 1;
}

.text-shadow {
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.6);
}

/* Section 通用样式 */
.section-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.section-title {
    color: var(--fd-blue);
    font-weight: bold;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--fd-red);
}

.content-text {
    line-height: 1.8;
    text-align: justify;
    font-size: 1.05rem;
    color: #555;
    /* text-indent: 2em; */
}

.content-text p {
    margin-bottom: 1.5rem;
}

/* 右侧导航 Sticky */
.sticky-top {
    z-index: 1020;
}

.list-group-item.active {
    background-color: var(--fd-blue);
    border-color: var(--fd-blue);
}

/* 愿景卡片 */
.card:hover {
    transform: translateY(-5px);
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1) !important;
}

/* 页脚 */
footer {
    background-color: #2c3e50 !important;
}

footer h5 {
    font-weight: bold;
    opacity: 0.9;
}

footer a:hover {
    color: white !important;
}