/* 全局变量 */
:root {
    --primary-color: #4a90e2;
    --primary-light: #6ba9f0;
    --primary-dark: #357abd;
    --accent-color: #5cb85c;
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
}


/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

html {
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    padding-top: 80px;
    overflow-x: hidden;
}

/* 导航栏section */
.navbar-section {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 9999;
    background-color: var(--card-bg);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

/* 导航栏内容 */
.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    min-width: 0;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-links .nav-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.95rem;
}
.navbar-links .nav-link i {
    font-size: 1.25rem;
}
.navbar-links .nav-text {
    display: none;
}

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

.navbar-brand {
    color: var(--primary-color) !important;
    font-weight: 700;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.navbar-brand i {
    font-size: 1.8rem;
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

.nav-link.active {
    color: var(--primary-color) !important;
    font-weight: 600;
}

/* 移动端汉堡菜单按钮（默认隐藏） */
button.navbar-toggle,
.navbar-section button.navbar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    line-height: 1;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-left: auto;
}

/* Banner区域 */
.hero-banner {
    margin-bottom: 2rem;
    width: 100%;
    overflow: hidden;
}
.hero-banner #heroBanner {
    position: relative;
    width: 100%;
    height: 50vw;
    max-height: 500px;
    overflow: hidden;
}
.hero-banner #heroBannerInner {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4,0,0.2,1);
}
.hero-banner .banner-slide {
    width: 100%;
    height: 100%;
    flex-shrink: 0;
    overflow: hidden;
}
.hero-banner .banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 搜索框（保留兼容） */
.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* 卡片样式 */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-img-top {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.card:hover .card-img-top {
    transform: scale(1.05);
}

.card-body {
    padding: 1.25rem;
}

.card-title {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.card-meta-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.card-meta-item i {
    color: var(--primary-color);
}

/* 按钮样式 */
.btn {
    border-radius: 8px;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary-color);
    border: none;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* 标签样式 */
.badge {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.85rem;
}

.badge-primary {
    background: rgba(74, 144, 226, 0.1);
    color: var(--primary-color);
}

/* 分页 */
.pagination .page-link {
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    margin: 0 0.2rem;
    border-radius: 8px;
}

.pagination .page-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination .page-item.active .page-link {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* 页脚 */
.footer {
    background: var(--card-bg);
    padding: 3rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.footer h5 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin-bottom: 0.8rem;
    transition: color 0.3s ease;
}

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

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-md);
    z-index: 9990;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* 响应式 - 平板 */
@media (max-width: 992px) {
    .navbar-links {
        gap: 0.5rem;
    }
    .nav-link {
        padding: 0.4rem 0.6rem !important;
        font-size: 0.9rem;
    }
}

/* 响应式 - 移动端 */
@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }
    .navbar-section {
        padding: 0.5rem 0;
    }
    button.navbar-toggle,
    .navbar-section button.navbar-toggle {
        display: flex;
    }
    .navbar-content {
        position: relative;
        flex-wrap: nowrap;
    }
    .navbar-links {
        position: absolute;
        top: calc(100% + 0.5rem);
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        padding: 0.75rem;
        box-shadow: var(--shadow-md);
        border-radius: 12px;
        border: 1px solid var(--border-color);
        gap: 0.25rem;
        z-index: 10000;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: max-height 0.3s ease, opacity 0.3s ease;
    }
    .navbar-links.active {
        max-height: 500px;
        opacity: 1;
    }
    .navbar-links .nav-link {
        padding: 0.75rem 1rem !important;
        border-radius: 8px;
        font-size: 0.95rem;
        gap: 0.5rem;
    }
    .navbar-links .nav-link i {
        font-size: 1.15rem;
    }
    .navbar-links .nav-text {
        display: inline;
    }
    .navbar-links .nav-link:hover {
        background: var(--bg-color);
    }
    .btn {
        padding: 0.5rem 1rem;
    }
    .footer {
        padding: 2rem 0;
        margin-top: 2rem;
    }
    .footer h5 {
        margin-bottom: 1rem;
    }
}

/* 响应式 - 小屏手机 */
@media (max-width: 480px) {
    body {
        padding-top: 65px;
    }
    .navbar-brand {
        font-size: 1.2rem;
    }
    .navbar-brand i {
        font-size: 1.4rem;
    }
}

/* Banner 移动端适配 */
@media (max-width: 768px) {
    .hero-banner #heroBanner {
        height: 40vw;
        max-height: 300px;
    }
    .hero-banner {
        margin-bottom: 1.5rem;
    }
    .hero-banner button {
        width: 28px !important;
        height: 28px !important;
        font-size: 14px !important;
    }
    .hero-banner #heroDots button {
        width: 8px !important;
        height: 8px !important;
    }
}