/* ==================== 公共变量 ==================== */
:root {
    --primary-color: #1a5c9e;
    --primary-dark: #0d4a8a;
    --primary-light: #2a7acc;
    --secondary-color: #ff6b35;
    --text-dark: #1a1a1a;
    --text-gray: #666;
    --text-light: #999;
    --bg-gray: #f5f7fa;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --container-width: 1200px;
}

/* ==================== 公共容器 ==================== */
.container {
    max-width: var(--container-width) !important;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 公共导航 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.99);
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 40px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-item a {
    font-size: 15px;
    color: var(--text-dark);
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
}

.nav-item a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.nav-item a:hover::after {
    width: 100%;
}

.nav-item.active a {
    color: var(--primary-color);
}

.nav-item.active a::after {
    width: 100%;
}

.header-btn {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
}

.header-phone svg {
    width: 16px;
    height: 16px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* ==================== 公共按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
}

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

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: #fff;
}

.btn-white {
    background: #fff;
    color: var(--primary-color);
}

.btn-white:hover {
    background: var(--bg-gray);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
}

/* ==================== 公共标题 ==================== */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

.section-title-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.section-title-en {
    font-size: 14px;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 10px;
}

/* ==================== 公共底部 ==================== */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo img {
    height: 40px;
}

.footer-logo-text {
    font-size: 24px;
    font-weight: 700;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
}

.footer-contact-item svg {
    width: 16px;
    height: 16px;
    color: var(--primary-light);
}

.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a:hover {
    color: rgba(255, 255, 255, 0.8);
}

/* ==================== 面包屑 ==================== */
.breadcrumb {
    background: var(--bg-gray);
    padding: 12px 0;
    margin-top: 70px;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-gray);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb-item::after {
    content: '/';
    color: var(--text-light);
}

.breadcrumb-item:last-child::after {
    content: '';
}

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

.breadcrumb-item.active {
    color: var(--primary-color);
}

/* ==================== 分页 ==================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination-item {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    color: var(--text-gray);
    transition: var(--transition);
}

.pagination-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== 动画 ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ==================== 响应式 ==================== */
@media (max-width: 992px) {
    .nav-list {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    
    .footer-brand {
        grid-column: span 2;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    html,
    body {
        overflow-x: hidden;
    }

    .slide-left,
    .slide-right {
        transform: translateY(20px);
    }

    .slide-left.visible,
    .slide-right.visible {
        transform: translateY(0);
    }

    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-brand {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}