/**
 * Connectors 主题主样式文件
 * 
 * 遵循 BEM 命名规范和移动端优先原则
 * 
 * @package Connectors
 */

/* ============================================
   基础样式
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: #ffffff;
}

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

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式（通用） */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #ea670f;
    color: #ffffff;
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #ffffff;
}

.btn-white {
    background: #ffffff;
    color: var(--secondary);
}

.btn-white:hover {
    background: #f5f5f5;
}

.btn-spacing {
    margin-left: 12px;
}

.button-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

:root {
    --primary: #0B5ED7;
    --primary-dark: #084298;
    --secondary: #003A8F;
    --cta: #F97316;
    --text: #1F2937;
    --muted: #6b7280;
    --bg-light: #F5F7FA;
    --border: #E5E7EB;
    --color-primary: #0B5ED7;
    --color-secondary: #003A8F;
    --color-text: #1F2937;
    --color-text-light: #666666;
    --color-border: #E5E7EB;
    --color-background: #ffffff;
    --spacing-unit: 1rem;
    --container-width: 1200px;
}

/* ============================================
   页眉样式
   ============================================ */

/* ============================================
   页眉样式（通用）
   ============================================ */
.site-header {
    background: #ffffff;
    border-bottom: 1px solid var(--border);
}

.site-header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.site-header__logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.site-header__logo-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 22px;
    font-weight: 700;
}

.site-header__nav {
    display: flex;
    align-items: center;
}

.site-header__menu {
    list-style: none;
    display: flex;
    gap: 24px;
    margin: 0;
    padding: 0;
}

.site-header__menu-item {
    margin: 0;
    position: relative;
}

.site-header__menu-link {
    font-weight: 500;
    color: var(--text);
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

/* 社媒图标板块 */
.site-header__social {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: 24px;
}

.site-header__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--text);
    transition: all 0.3s ease;
    border-radius: 50%;
    background: transparent;
}

.site-header__social-link:hover {
    color: var(--primary);
    background: var(--bg-light);
    transform: translateY(-2px);
}

.site-header__social-link svg {
    width: 20px;
    height: 20px;
    display: block;
}

/* 下拉菜单样式 */
.site-header__menu-item.has-submenu {
    position: relative;
}

.site-header__menu-item.has-submenu > .site-header__menu-link {
    position: relative;
}

.submenu-toggle {
    font-size: 10px;
    transition: transform 0.3s ease;
    display: inline-block;
    margin-left: 4px;
    color: var(--muted);
}

/* 桌面端悬停时旋转箭头 */
@media (min-width: 900px) {
    .site-header__menu-item.has-submenu:hover .submenu-toggle {
        transform: rotate(180deg);
    }
}

.site-header__submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #ffffff;
    min-width: 200px;
    list-style: none;
    margin: 0;
    padding: 8px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    border: 1px solid var(--border);
    margin-top: 8px;
}

.site-header__menu-item.has-submenu:hover > .site-header__submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.site-header__submenu-item {
    margin: 0;
}

.site-header__submenu-link {
    display: block;
    padding: 10px 20px;
    color: var(--text);
    text-decoration: none;
    font-weight: 400;
    font-size: 14px;
    transition: all 0.3s ease;
}

.site-header__submenu-link:hover {
    background: var(--bg-light);
    color: var(--primary);
    padding-left: 24px;
}

.site-header__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    position: relative;
}

.site-header__toggle-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text);
    position: relative;
    transition: all 0.3s ease;
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text);
    position: absolute;
    left: 0;
    transition: all 0.3s ease;
}

.site-header__toggle-icon::before {
    top: -8px;
}

.site-header__toggle-icon::after {
    top: 8px;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
    background-color: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
    transform: rotate(45deg);
    top: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
    transform: rotate(-45deg);
    top: 0;
}

/* 桌面端显示导航 */
@media (min-width: 900px) {
    .site-header__nav {
        display: flex;
    }
    
    .site-header__toggle {
        display: none;
    }
}

/* 移动端菜单 */
@media (max-width: 899px) {
    .site-header__nav {
        display: none;
    }
    
    .site-header__social {
        margin-left: 12px;
        gap: 8px;
    }
    
    .site-header__social-link {
        width: 32px;
        height: 32px;
    }
    
    .site-header__social-link svg {
        width: 18px;
        height: 18px;
    }
    
    .site-header__toggle {
        display: block;
    }
    
    .site-header__nav--open {
        display: block !important;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border);
        padding: 20px;
        z-index: 1000;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }
    
    .site-header__nav--open .site-header__menu {
        flex-direction: column;
        gap: 12px;
    }
    
    .site-header__nav--open .site-header__menu-item {
        width: 100%;
    }
    
    .site-header__nav--open .site-header__menu-link,
    .site-header__nav--open .btn {
        display: block;
        width: 100%;
        text-align: left;
        padding: 12px;
    }
    
    /* 移动端下拉菜单样式 */
    .site-header__nav--open .site-header__submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-top: 1px solid var(--border);
        margin-top: 0;
        padding: 0;
        background: var(--bg-light);
        display: none;
    }
    
    .site-header__nav--open .site-header__menu-item.has-submenu.submenu-open > .site-header__submenu {
        display: block;
    }
    
    .site-header__nav--open .site-header__submenu-link {
        padding: 10px 24px;
    }
    
    .site-header__nav--open .submenu-toggle {
        margin-left: auto;
        font-size: 12px;
    }
    
    .site-header__nav--open .site-header__menu-item.has-submenu.submenu-open .submenu-toggle {
        transform: rotate(180deg);
    }
}

/* ============================================
   主内容区域
   ============================================ */

.site-main {
    min-height: 60vh;
    padding: calc(var(--spacing-unit) * 2) 0;
}

.content-area {
    padding: var(--spacing-unit) 0;
}

/* ============================================
   文章样式
   ============================================ */

.post-item {
    margin-bottom: calc(var(--spacing-unit) * 2);
    padding-bottom: calc(var(--spacing-unit) * 2);
    border-bottom: 1px solid var(--color-border);
}

.post-item:last-child {
    border-bottom: none;
}

.post-item__header {
    margin-bottom: var(--spacing-unit);
}

.post-item__title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.post-item__title-link {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.post-item__meta {
    font-size: 0.875rem;
    color: var(--color-text-light);
    display: flex;
    gap: var(--spacing-unit);
}

.post-item__content {
    margin-bottom: var(--spacing-unit);
    color: var(--color-text);
}

.post-item__footer {
    margin-top: var(--spacing-unit);
}

.post-item__link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.post-item__link:hover {
    text-decoration: underline;
}

/* ============================================
   页脚样式（通用）
   ============================================ */
.site-footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 50px 0 0;
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
}

/* Logo列样式 */
.site-footer__logo-column {
    display: flex;
    align-items: flex-start;
}

.site-footer__logo {
    width: 100%;
}

.site-footer__logo-img {
    max-height: 100px;
    width: auto;
    display: block;
}

.site-footer__logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    display: block;
}

.site-footer__logo-text:hover {
    color: var(--primary);
}

.site-footer__heading {
    color: #ffffff;
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 600;
}

.site-footer__text {
    color: #cbd5e1;
    font-size: 15px;
    line-height: 1.6;
}

.site-footer__menu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-footer__menu-item {
    margin-bottom: 12px;
}

.site-footer__menu-link {
    color: #cbd5e1;
    transition: color 0.3s ease;
    font-size: 15px;
    text-decoration: none;
    display: inline-block;
}

.site-footer__menu-link:hover {
    color: #ffffff;
}

/* Contact菜单样式 */
.site-footer__contact-menu {
    margin-bottom: 24px;
}

.site-footer__contact-item {
    margin-bottom: 16px;
}

.site-footer__contact-link {
    display: flex;
    align-items: center;
    color: #cbd5e1;
    transition: all 0.3s ease;
    font-size: 15px;
    text-decoration: none;
    line-height: 1.5;
}

.site-footer__contact-link:hover {
    color: #ffffff;
}

.site-footer__contact-link svg {
    flex-shrink: 0;
}

.site-footer__contact-link span {
    word-break: break-word;
}

/* Footer 社媒图标板块 */
.site-footer__social {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}

.site-footer__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: #cbd5e1;
    transition: all 0.3s ease;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer__social-link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.site-footer__social-link svg {
    width: 20px;
    height: 20px;
    display: block;
}

/* Footer底部 */
.site-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    background: #1e293b;
    width: 100%;
    margin-top: 0;
}

.site-footer__bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.site-footer__company-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 14px;
    color: #cbd5e1;
    width: 100%;
}

.site-footer__company-name {
    font-weight: 600;
    color: #ffffff;
}

.site-footer__address {
    color: #94a3b8;
    line-height: 1.6;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}

.site-footer__address-icon {
    flex-shrink: 0;
    color: #94a3b8;
    vertical-align: middle;
}

/* 响应式页脚 */
@media (max-width: 900px) {
    .site-footer {
        padding: 40px 0 0;
    }
    
    .site-footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
        padding-bottom: 30px;
    }
    
    .site-footer__logo-column {
        grid-column: 1 / -1;
        justify-content: center;
        text-align: center;
    }
    
    .site-footer__logo-img {
        max-height: 80px;
        margin: 0 auto;
    }
    
    .site-footer__social {
        margin-top: 16px;
        gap: 10px;
        justify-content: flex-start;
    }
    
    .site-footer__social-link {
        width: 36px;
        height: 36px;
    }
    
    .site-footer__social-link svg {
        width: 18px;
        height: 18px;
    }
    
    .site-footer__bottom {
        padding: 20px 0;
    }
    
    .site-footer__bottom-content {
        justify-content: space-between;
    }
    
    .site-footer__company-info {
        font-size: 13px;
        justify-content: space-between;
        width: 100%;
    }
    
    .site-footer__company-name {
        margin-right: 0;
    }
    
    .site-footer__address {
        margin-left: 0;
    }
}

@media (max-width: 600px) {
    .site-footer__grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .site-footer__logo-column {
        grid-column: 1;
    }
    
    .site-footer__logo-img {
        max-height: 70px;
    }
    
    .site-footer__social {
        margin-top: 20px;
        justify-content: flex-start;
    }
    
    .site-footer__bottom-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .site-footer__company-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        width: 100%;
    }
    
    .site-footer__company-name {
        margin-right: 0;
    }
    
    .site-footer__address {
        margin-left: 0;
    }
}

/* ============================================
   面包屑导航
   ============================================ */

.breadcrumbs {
    margin-bottom: var(--spacing-unit);
}

.breadcrumbs__list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
}

.breadcrumbs__item {
    display: flex;
    align-items: center;
}

.breadcrumbs__item::after {
    content: '/';
    margin-left: 0.5rem;
    color: var(--color-text-light);
}

.breadcrumbs__item:last-child::after {
    display: none;
}

.breadcrumbs__link {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.875rem;
}

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

.breadcrumbs__item--current span {
    color: var(--color-text);
    font-size: 0.875rem;
}

/* ============================================
   分页导航
   ============================================ */

.pagination {
    margin-top: calc(var(--spacing-unit) * 2);
}

.pagination__list {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
}

.pagination__link {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.pagination__link:hover {
    background-color: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.pagination__item--current .pagination__link {
    background-color: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ============================================
   响应式工具类
   ============================================ */

.no-posts {
    text-align: center;
    padding: calc(var(--spacing-unit) * 2);
    color: var(--color-text-light);
}