/* ==========================================================================
   补天云网站 - 共享样式
   浅色调、白底黑字为主
   ========================================================================== */

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
    color: #222;
    background-color: #ffffff;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: #1a5fb4;
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover,
a:focus {
    color: #0d3d80;
    text-decoration: underline;
}

a:focus-visible {
    outline: 2px solid #1a5fb4;
    outline-offset: 2px;
}

img {
    max-width: 100%;
    height: auto;
    border: 0;
}

h1, h2, h3, h4, h5, h6 {
    color: #111;
    line-height: 1.3;
    font-weight: 600;
}

h1 { font-size: 1.85rem; margin-bottom: 0.8em; }
h2 { font-size: 1.5rem; margin: 1.4em 0 0.6em; border-bottom: 1px solid #e5e5e5; padding-bottom: 0.4em; }
h3 { font-size: 1.2rem; margin: 1.2em 0 0.5em; }
h4 { font-size: 1.05rem; margin: 1em 0 0.4em; }

p {
    margin: 0 0 1em 0;
}

ul, ol {
    margin: 0 0 1em 1.4em;
}

li {
    margin-bottom: 0.4em;
}

code {
    font-family: "Consolas", "Courier New", monospace;
    background: #f4f4f4;
    padding: 0.1em 0.35em;
    border-radius: 3px;
    font-size: 0.95em;
    color: #c0392b;
}

hr {
    border: 0;
    border-top: 1px solid #e5e5e5;
    margin: 1.5em 0;
}

/* ==========================================================================
   站点容器
   ========================================================================== */
.site-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    flex: 1 0 auto;
}

/* ==========================================================================
   顶部 Header + 导航
   ========================================================================== */
.site-header {
    background-color: #ffffff;
    border-bottom: 1px solid #e5e5e5;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.site-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #111;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.site-brand:hover {
    text-decoration: none;
    color: #1a5fb4;
}

.site-brand-logo {
    height: 38px;
    width: auto;
}

.site-brand-name {
    white-space: nowrap;
}

.site-tagline {
    color: #666;
    font-size: 0.85rem;
    font-weight: normal;
    margin-left: 6px;
}

/* ==========================================================================
   顶部主导航（动感菜单）
   ========================================================================== */
.main-nav {
    background: linear-gradient(180deg, #fafafa 0%, #f0f0f0 100%);
    border-bottom: 1px solid #e0e0e0;
}

.main-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
}

.main-nav-item {
    position: relative;
    flex: 1 1 auto;
    min-width: 120px;
    text-align: center;
}

.main-nav-link {
    display: block;
    padding: 14px 18px;
    color: #222;
    text-decoration: none;
    font-size: 1.02rem;
    font-weight: 500;
    border-right: 1px solid #e5e5e5;
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.main-nav-item:last-child .main-nav-link {
    border-right: 0;
}

.main-nav-link::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(26, 95, 180, 0.08), transparent);
    transition: left 0.5s ease;
    pointer-events: none;
}

.main-nav-link:hover,
.main-nav-link:focus {
    background-color: #1a5fb4;
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.main-nav-link:hover::before,
.main-nav-link:focus::before {
    left: 100%;
}

.main-nav-link.is-active {
    background-color: #1a5fb4;
    color: #fff;
    box-shadow: inset 0 -3px 0 #0d3d80;
}

/* 主导航子菜单（dropdown） */
.main-nav-item.has-submenu {
    position: relative;
}

.main-nav-submenu {
    list-style: none;
    margin: 0;
    padding: 6px 0;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    min-width: 100%;
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-top: 0;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
    z-index: 99;
    display: none;
}

.main-nav-item.has-submenu:hover .main-nav-submenu,
.main-nav-item.has-submenu:focus-within .main-nav-submenu {
    display: block;
}

.main-nav-subitem {
    margin: 0;
    text-align: left;
}

.main-nav-sublink {
    display: block;
    padding: 10px 16px;
    color: #222;
    font-size: 0.95rem;
    text-decoration: none;
    border-bottom: 1px dashed #eee;
    white-space: nowrap;
}

.main-nav-subitem:last-child .main-nav-sublink {
    border-bottom: 0;
}

.main-nav-sublink:hover,
.main-nav-sublink:focus {
    background: #f0f6fc;
    color: #1a5fb4;
    text-decoration: none;
}

.main-nav-sublink.is-active {
    background: #1a5fb4;
    color: #fff;
    font-weight: 500;
}

/* 移动端菜单切换按钮（默认隐藏，小屏显示） */
.main-nav-toggle {
    display: none;
    width: 100%;
    padding: 12px 20px;
    background: transparent;
    border: 0;
    color: #222;
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    text-align: left;
    cursor: pointer;
}

.main-nav-toggle:hover,
.main-nav-toggle:focus {
    background-color: #1a5fb4;
    color: #fff;
    outline: none;
}

/* 子菜单展开按钮（默认隐藏，小屏显示） */
.main-nav-submenu-toggle {
    display: none;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 48px;
    border: 0;
    background: transparent;
    color: #1a5fb4;
    font-size: 0.85rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.main-nav-submenu-toggle:hover,
.main-nav-submenu-toggle:focus {
    outline: none;
    background: rgba(26, 95, 180, 0.08);
}

/* 面包屑 */
.breadcrumb {
    background: #f8f8f8;
    border-bottom: 1px solid #e5e5e5;
    padding: 10px 0;
    font-size: 0.9rem;
    color: #555;
}

.breadcrumb-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    color: #999;
    margin-right: 6px;
}

.breadcrumb a {
    color: #1a5fb4;
}

.breadcrumb-current {
    color: #666;
}

/* ==========================================================================
   内容区
   ========================================================================== */
.site-main {
    padding: 30px 0 40px;
    flex: 1 0 auto;
}

.content {
    background: #fff;
}

.page-title {
    font-size: 1.9rem;
    color: #111;
    margin-bottom: 0.4em;
    padding-bottom: 0.5em;
    border-bottom: 2px solid #1a5fb4;
}

.page-subtitle {
    color: #555;
    font-size: 1.05rem;
    margin-bottom: 1.5em;
    font-weight: normal;
}

.lead {
    font-size: 1.05rem;
    color: #333;
    background: #fafafa;
    border-left: 4px solid #1a5fb4;
    padding: 14px 18px;
    margin-bottom: 1.5em;
    line-height: 1.7;
}

/* ==========================================================================
   卡片 / 概览
   ========================================================================== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
    margin: 1.5em 0 2em;
}

.card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 20px;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
}

.card:hover {
    border-color: #1a5fb4;
    box-shadow: 0 4px 14px rgba(26, 95, 180, 0.1);
    transform: translateY(-2px);
}

.card-title {
    font-size: 1.15rem;
    margin: 0 0 0.5em;
    color: #1a5fb4;
}

.card-title a {
    color: #1a5fb4;
}

.card-desc {
    color: #555;
    font-size: 0.95rem;
    flex: 1 1 auto;
    margin-bottom: 1em;
}

.card-link {
    font-size: 0.92rem;
    font-weight: 500;
    margin-top: auto;
    align-self: flex-start;
}

.card-link::after {
    content: " →";
}

/* ==========================================================================
   表格
   ========================================================================== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.2em 0;
    background: #fff;
    font-size: 0.95rem;
}

.data-table th,
.data-table td {
    border: 1px solid #e0e0e0;
    padding: 10px 12px;
    text-align: left;
    vertical-align: top;
}

.data-table thead th {
    background: #f4f6f8;
    color: #222;
    font-weight: 600;
}

.data-table tbody tr:nth-child(even) {
    background: #fafafa;
}

.data-table tbody tr:hover {
    background: #f0f6fc;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background: #f8f8f8;
    border-top: 1px solid #e5e5e5;
    padding: 24px 0;
    color: #555;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.site-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-links {
    list-style: none;
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.footer-links a {
    color: #555;
}

.footer-copy {
    color: #666;
}

/* ==========================================================================
   章节 / 折叠
   ========================================================================== */
.section {
    margin-bottom: 2em;
}

.section-title {
    font-size: 1.3rem;
    margin: 0 0 0.8em;
    color: #111;
    padding-left: 12px;
    border-left: 4px solid #1a5fb4;
}

.manual-category {
    margin: 1.2em 0;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.manual-category-header {
    background: #f4f6f8;
    padding: 12px 16px;
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    color: #222;
    transition: background 0.2s ease;
}

.manual-category-header:hover,
.manual-category-header:focus {
    background: #e8eef5;
    color: #1a5fb4;
    outline: none;
}

.manual-category-toggle {
    color: #1a5fb4;
    font-size: 0.85rem;
    transition: transform 0.3s ease;
}

.manual-category.is-open .manual-category-toggle {
    transform: rotate(180deg);
}

.manual-category-body {
    display: none;
    padding: 8px 0;
    background: #fff;
}

.manual-category.is-open .manual-category-body {
    display: block;
}

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

.manual-item {
    border-bottom: 1px dashed #eee;
}

.manual-item:last-child {
    border-bottom: 0;
}

.manual-link {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    color: #1a5fb4;
    font-size: 0.95rem;
    transition: background 0.15s ease;
    gap: 8px;
}

.manual-link:hover,
.manual-link:focus {
    background: #f0f6fc;
    text-decoration: none;
    color: #0d3d80;
}

.manual-icon {
    color: #c0392b;
    font-weight: bold;
    font-size: 0.85rem;
}

/* ==========================================================================
   关于页面 - 联系信息
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin: 1.5em 0;
}

.contact-item {
    background: #fafafa;
    border: 1px solid #e5e5e5;
    border-radius: 4px;
    padding: 18px;
    text-align: center;
}

.contact-item-title {
    font-size: 1rem;
    color: #555;
    margin-bottom: 0.6em;
    font-weight: 500;
}

.contact-item-value {
    color: #222;
    font-size: 1rem;
    word-break: break-all;
}

.contact-item-image {
    max-width: 180px;
    margin: 0 auto 10px;
    display: block;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
}

/* ==========================================================================
   适配：平板（900px 以下启用折叠菜单）
   ========================================================================== */
@media (max-width: 900px) {
    .site-header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .site-tagline {
        display: block;
        margin-left: 0;
        font-size: 0.8rem;
    }

    /* 显示"菜单"按钮，导航列表默认收起 */
    .main-nav-toggle {
        display: block;
        border-bottom: 1px solid #e0e0e0;
    }

    .main-nav-list {
        display: none;
        flex-direction: column;
        flex-wrap: nowrap;
    }

    .main-nav.is-open .main-nav-list {
        display: flex;
    }

    .main-nav-item {
        flex: 1 1 100%;
        min-width: 0;
        position: relative;
    }

    .main-nav-link {
        border-right: 0;
        border-bottom: 1px solid #e5e5e5;
        padding: 12px 8px;
        font-size: 0.95rem;
        text-align: left;
        padding-right: 56px;
    }

    /* 子菜单展开按钮（点击展开，不依赖 hover） */
    .main-nav-submenu-toggle {
        display: block;
    }

    .main-nav-item.submenu-open .main-nav-submenu-toggle {
        transform: rotate(180deg);
    }

    /* 子菜单：内嵌展开，随父项缩进 */
    .main-nav-submenu {
        position: static;
        box-shadow: none;
        border: 0;
        border-bottom: 1px solid #e5e5e5;
        padding: 0 0 4px 16px;
        background: #fafafa;
        display: none;
    }

    .main-nav-item.submenu-open .main-nav-submenu {
        display: block;
    }

    .main-nav-sublink {
        padding: 10px 12px;
        font-size: 0.9rem;
        border-bottom: 1px dashed #e5e5e5;
    }
}

/* ==========================================================================
   适配：手机
   ========================================================================== */
@media (max-width: 600px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.08rem; }

    .site-container {
        padding: 0 14px;
    }

    .site-main {
        padding: 18px 0 28px;
    }

    .site-header-inner,
    .main-nav-inner,
    .site-footer-inner {
        padding-left: 14px;
        padding-right: 14px;
    }

    .main-nav-toggle {
        padding: 11px 14px;
        font-size: 0.95rem;
    }

    .main-nav-link {
        padding: 11px 14px;
        padding-right: 56px;
        font-size: 0.95rem;
    }

    .main-nav-sublink {
        font-size: 0.85rem;
        padding: 9px 10px;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .data-table {
        font-size: 0.85rem;
    }

    .data-table th,
    .data-table td {
        padding: 6px 8px;
    }

    .site-footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

/* ==========================================================================
   工具类
   ========================================================================== */
.text-muted { color: #777; }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5em; }
.mt-2 { margin-top: 1em; }
.mt-3 { margin-top: 1.5em; }
.mb-1 { margin-bottom: 0.5em; }
.mb-2 { margin-bottom: 1em; }
.mb-3 { margin-bottom: 1.5em; }

.tag-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0.5em 0 1em;
    padding: 0;
}

.tag {
    display: inline-block;
    background: #f0f4f8;
    color: #1a5fb4;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
    border: 1px solid #d8e3ef;
}

.note {
    background: #fffbea;
    border: 1px solid #f0e5b8;
    border-left: 4px solid #d4a017;
    padding: 12px 16px;
    border-radius: 3px;
    margin: 1em 0;
    color: #5b4d00;
}