/* ============================================================
 * 全站公共设计系统（前台专用，后台不引用）
 * ------------------------------------------------------------
 * 加载位置：/template/default/html/comm/head.html（最后加载，覆盖基础库）
 * 设计目标：大气、可信、现代、舒适，细节克制统一
 * 组成：
 *   1  设计令牌          2  基础与排版        3  顶部导航
 *   4  首页主视觉        5  内页横幅/面包屑   6  区块标题
 *   7  页面容器          8  卡片/图文          9  列表行
 *   10 按钮/徽标         11 表单/认证          12 表格
 *   13 分页              14 页脚/悬浮组件      15 正文排版
 *   16 会员中心/工具页    17 考试系统          18 响应式
 * 说明：--design-* 变量为全站唯一令牌来源，页面级样式（如云盘、
 *       PDF、电机面价）只做别名引用，不再各自定义一套色值。
 * ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root {
    /* 品牌主色：深海军蓝，与页脚同一色系，克制不抢眼 */
    --design-primary:        #1A3A6B;
    --design-primary-light:  #2A5087;
    --design-primary-dark:   #0F2A52;
    --design-primary-bg:     #EDF2F8;
    --design-primary-hover:  #DDE6F2;
    --design-primary-ring:   rgba(26, 58, 107, 0.16);
    --design-accent:         #1A3A6B;

    /* 语义色 */
    --design-success:        #047857;
    --design-success-bg:     #ECFDF5;
    --design-warning:        #B45309;
    --design-warning-bg:     #FFFBEB;
    --design-danger:         #B91C1C;
    --design-danger-bg:      #FEF2F2;

    /* 中性色：降低蓝灰倾向，文字更耐看 */
    --design-text:           #111827;
    --design-text-body:      #374151;
    --design-text-muted:     #6B7280;
    --design-text-soft:      #9CA3AF;
    --design-border:         #E5E7EB;
    --design-border-light:   #F1F3F6;
    --design-bg:             #FFFFFF;
    --design-bg-gray:        #F7F8FA;
    --design-bg-deep:        #0B1B36;

    /* 圆角：收敛到 12px，避免圆钝感 */
    --design-radius-sm:      4px;
    --design-radius:         8px;
    --design-radius-lg:      12px;
    --design-radius-xl:      14px;
    --design-radius-pill:    999px;

    /* 阴影：只做轻微层次，不制造光晕 */
    --design-shadow-xs:      0 1px 2px rgba(16, 24, 40, 0.04);
    --design-shadow-sm:      0 1px 2px rgba(16, 24, 40, 0.03), 0 6px 16px -12px rgba(16, 24, 40, 0.12);
    --design-shadow:         0 2px 6px -2px rgba(16, 24, 40, 0.05), 0 12px 28px -18px rgba(16, 24, 40, 0.18);
    --design-shadow-md:      0 10px 24px -14px rgba(16, 24, 40, 0.18);
    --design-shadow-lg:      0 24px 48px -24px rgba(16, 24, 40, 0.24);

    /* 间距 */
    --design-space-1: 4px;
    --design-space-2: 8px;
    --design-space-3: 12px;
    --design-space-4: 16px;
    --design-space-5: 20px;
    --design-space-6: 24px;
    --design-space-8: 32px;

    /* 字体 */
    --design-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    --design-font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --design-font-size-sm: 12px;
    --design-font-size-base: 14px;
    --design-font-size-lg: 16px;
    --design-line-height: 1.7;

    /* 主体渐变：仅保留极克制的深蓝过渡 */
    --design-gradient: linear-gradient(135deg, #1A3A6B 0%, #0F2A52 100%);
    --design-gradient-soft: linear-gradient(180deg, #F7F9FC 0%, #FFFFFF 100%);

    /* 过渡 */
    --design-ease: cubic-bezier(0.22, 0.7, 0.3, 1);
    --design-transition: all 0.18s var(--design-ease);
    --design-transition-fast: all 0.14s var(--design-ease);
}

/* ---------- 2. 基础与排版 ---------- */
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--design-font-family);
    color: var(--design-text-body);
    font-size: var(--design-font-size-base);
    line-height: var(--design-line-height);
    /* 页面底色保持白色：淡灰底会把白卡/白表格压得没有层次，也不符合全站既有观感 */
    background: var(--design-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    /* 短页面时页脚吸底，避免页脚下方露出页面底色 */
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
::selection {
    background: var(--design-primary-hover);
    color: var(--design-primary-dark);
}
h1, h2, h3, h4, h5, h6 {
    color: var(--design-text);
    letter-spacing: -0.01em;
    font-weight: 600;
}
a {
    color: var(--design-primary);
    transition: color var(--design-transition-fast);
}
a:hover {
    color: var(--design-primary-dark);
    text-decoration: none;
}
strong, b {
    font-weight: 600;
}
img {
    max-width: 100%;
}
.container {
    max-width: 1180px;
}

/* ---------- 3. 顶部导航 ---------- */
.navbar.fixed-top {
    background: rgba(255, 255, 255, 0.9) !important;
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--design-border-light);
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.04), 0 12px 32px -20px rgba(15, 23, 42, 0.28) !important;
}
.navbar .navbar-brand {
    display: flex;
    align-items: center;
}
.navbar .navbar-brand img {
    height: 46px;
    width: auto;
    transition: var(--design-transition);
}
.navbar .navbar-brand:hover img {
    opacity: 0.9;
}
.navbar-expand-lg .navbar-nav .nav-link {
    position: relative;
    padding: 8px 16px !important;
    margin: 0 2px;
    font-size: 14px;
    font-weight: 500;
    color: #334155;
    border-radius: var(--design-radius);
    transition: var(--design-transition);
}
.navbar-expand-lg .navbar-nav .nav-link:hover {
    color: var(--design-primary);
    background: var(--design-primary-bg);
}
.navbar-expand-lg .navbar-nav .nav-link i {
    margin-right: 6px;
    font-size: 13px;
    opacity: 0.7;
    transition: var(--design-transition-fast);
}
.navbar-expand-lg .navbar-nav .nav-item.active .nav-link i,
.navbar-expand-lg .navbar-nav .nav-link:hover i {
    opacity: 1;
}
.navbar-expand-lg .navbar-nav .nav-item.active .nav-link {
    color: var(--design-primary);
    font-weight: 600;
    background: var(--design-primary-bg);
}
.navbar .navbar-text {
    margin-left: var(--design-space-3);
}
.navbar .navbar-text a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 36px;
    padding: 0 16px;
    border-radius: var(--design-radius-pill);
    background: var(--design-primary-bg);
    border: 1px solid var(--design-primary-hover);
    color: var(--design-primary) !important;
    font-size: 13px;
    font-weight: 600;
    transition: var(--design-transition);
}
.navbar .navbar-text a:hover {
    background: var(--design-primary);
    border-color: var(--design-primary);
    color: #fff !important;
    box-shadow: 0 6px 16px -10px rgba(26, 58, 107, 0.35);
}
.navbar .navbar-text a i {
    font-size: 13px;
}

/* ---------- 4. 首页主视觉 ---------- */
.home-hero {
    position: relative;
    overflow: hidden;
    background: var(--design-bg-deep);
    /* body 为 flex 列布局（页脚吸底），显式给宽度避免 Swiper 与容器宽度互相撑大 */
    width: 100%;
    flex-shrink: 0;
}
.home-hero .swiper-slide {
    position: relative;
    /* 宽度 100% 动态，高度按原图 1920×500 等比；容器与图片同比例时 object-fit:cover
       既不裁切也不拉伸。手机端在下面的媒体查询里改回固定比例（否则高度只有 100px 左右，
       标题和副标题放不下）。 */
    height: auto;
    aspect-ratio: 1920 / 500;
    overflow: hidden;
}
.home-hero .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.home-hero .swiper-slide::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(90deg, rgba(4, 11, 26, 0.78) 0%, rgba(4, 11, 26, 0.46) 46%, rgba(4, 11, 26, 0.04) 100%);
    pointer-events: none;
}
/* 文字层直接相对 slide 定位；不要给 container 加 relative，
   否则 container 位于图片之后的普通流中，会把标题挤出可视区域 */
.home-hero .position-absolute {
    z-index: 2;
    max-width: 640px;
}
.home-hero h1 {
    color: #fff;
    font-size: 40px;
    line-height: 1.28;
    font-weight: 600;
    letter-spacing: 0.01em;
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.28);
    margin-bottom: 14px;
}
.home-hero h4 {
    font-size: 17px;
    font-weight: 400;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.86);
    text-shadow: 0 1px 12px rgba(0, 0, 0, 0.3);
    max-width: 560px;
}
.home-hero .swiper-pagination {
    bottom: 28px;
}
.home-hero .swiper-pagination-bullet {
    width: 8px;
    height: 8px;
    background: #fff;
    opacity: 0.42;
    border-radius: var(--design-radius-pill);
    transition: var(--design-transition);
}
.home-hero .swiper-pagination-bullet-active {
    width: 26px;
    opacity: 1;
    background: #fff;
}
.home-hero .swiper-button-prev,
.home-hero .swiper-button-next {
    width: 46px;
    height: 46px;
    margin-top: -23px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.28);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    color: #fff;
    /* 模板给了 Bootstrap 的 d-md-block（display:block !important），flex 会被顶掉，
       所以用 text-align + line-height 让 ::after 的内联箭头居中 */
    text-align: center;
    line-height: 44px;
    transition: var(--design-transition);
}
.home-hero .swiper-button-prev:hover,
.home-hero .swiper-button-next:hover {
    background: rgba(26, 58, 107, 0.72);
    border-color: transparent;
}
.home-hero .swiper-button-prev::after,
.home-hero .swiper-button-next::after {
    /* 本站 swiper.min.css 是裁剪版，没有 swiper-icons 字体，::after 的 content 是 none，
       按钮就成了空圆圈。这里统一用站内 Font Awesome 4.7 的箭头字符。 */
    font-family: FontAwesome;
    font-size: 18px;
    font-weight: normal;
    line-height: 1;
}
.home-hero .swiper-button-prev::after { content: "\f104"; }
.home-hero .swiper-button-next::after { content: "\f105"; }

/* ---------- 5. 内页横幅与面包屑 ---------- */
.jumbotron.jumbotron-fluid {
    position: relative;
    overflow: hidden;
    margin: 0 !important;
    padding: 76px 0 68px !important;
    border-radius: 0 !important;
    background-size: cover !important;
    background-position: center center !important;
    background-repeat: no-repeat !important;
}
.jumbotron.jumbotron-fluid::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(4, 11, 26, 0.82) 0%, rgba(4, 11, 26, 0.5) 55%, rgba(4, 11, 26, 0.18) 100%);
    pointer-events: none;
}
.jumbotron.jumbotron-fluid .container {
    position: relative;
    z-index: 1;
}
.jumbotron.jumbotron-fluid h1 {
    font-size: 34px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #fff;
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.3);
}
.jumbotron.jumbotron-fluid p {
    margin: 10px 0 0;
    font-size: 15px;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.82) !important;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    padding: 0;
    margin: 0 0 var(--design-space-5);
    background: transparent;
    font-size: 13px;
    letter-spacing: 0.02em;
}
.breadcrumb-item {
    display: inline-flex;
    align-items: center;
    color: var(--design-text-soft);
}
.breadcrumb-item a {
    color: var(--design-text-muted);
    transition: var(--design-transition-fast);
}
.breadcrumb-item a:hover {
    color: var(--design-primary);
}
.breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    color: #CBD5E1;
    padding: 0 8px;
}
.breadcrumb-item.active {
    color: var(--design-text);
    font-weight: 500;
}

/* ---------- 6. 区块标题 ---------- */
.section-head {
    display: block;
    margin: 0;
    font-size: 28px;
    line-height: 1.35;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--design-text) !important;
}
.section-head::after {
    content: "";
    display: block;
    width: 32px;
    height: 2px;
    margin: 14px auto 0;
    border-radius: 2px;
    background: var(--design-primary);
}
.section-head.text-left::after {
    margin-left: 0;
}
.section-sub {
    display: block;
    margin: 12px 0 0 !important;
    font-size: 13px !important;
    letter-spacing: 0.04em;
    color: var(--design-text-muted) !important;
    font-weight: 400;
}

/* 区块级标题（内页小标题） */
.section-title-sm {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 var(--design-space-4);
    padding-left: 12px;
    border-left: 3px solid var(--design-primary);
    font-size: 17px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--design-text);
}
.section-title-sm i {
    color: var(--design-primary);
}

/* ---------- 7. 页面容器 ---------- */
.container.pages {
    padding-top: var(--design-space-8);
    padding-bottom: 64px;
}
.home-section {
    padding: 80px 0 !important;
}
.band-light {
    background: var(--design-bg-gray) !important;
}
.page-head {
    margin-bottom: var(--design-space-6);
}

/* ---------- 8. 卡片 / 图文 / 案例 ---------- */
.card {
    margin: 0;
    border: 1px solid var(--design-border-light) !important;
    border-radius: var(--design-radius-lg) !important;
    background: var(--design-bg);
    box-shadow: var(--design-shadow-sm) !important;
    transition: transform 0.24s var(--design-ease), box-shadow 0.24s var(--design-ease), border-color 0.24s var(--design-ease);
}
.row > [class*="col"] > .card {
    margin-bottom: var(--design-space-6);
}
.card:hover {
    transform: translateY(-2px);
    border-color: #DCE3EE !important;
    box-shadow: var(--design-shadow-md) !important;
}
.card .card-body {
    padding: var(--design-space-5) var(--design-space-5) calc(var(--design-space-5) + 2px);
}
.card .card-title {
    margin-bottom: 10px;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--design-text);
}
.card .card-title a {
    color: var(--design-text);
}
.card .card-title a:hover {
    color: var(--design-primary);
}
.card .card-text {
    color: var(--design-text-muted);
    font-size: 13.5px;
    line-height: 1.75;
}
.card .card-header,
.card .card-footer {
    border-color: var(--design-border-light) !important;
    background: #FBFCFE !important;
    font-size: 13.5px;
}
.card .card-header {
    padding: 14px 20px;
    font-weight: 600;
    color: var(--design-text);
    border-radius: var(--design-radius-lg) var(--design-radius-lg) 0 0 !important;
}
.card .card-footer {
    padding: 12px 20px;
    color: var(--design-text-muted);
}

/* 统一配图容器：固定高度 + 悬停轻微放大 */
.card-img-200,
.card-img-180,
.card-img-150,
.card-img-120,
.card-img-100 {
    overflow: hidden;
    background: #F1F5F9;
    border-radius: var(--design-radius-lg) var(--design-radius-lg) 0 0;
}
.card-img-200 { height: 210px; }
.card-img-180 { height: 190px; }
.card-img-150 { height: 180px; }
.card-img-120 { height: 150px; }
.card-img-100 { height: 130px; }
.card-img-200 img,
.card-img-180 img,
.card-img-150 img,
.card-img-120 img,
.card-img-100 img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--design-ease);
}
.card:hover .card-img-200 img,
.card:hover .card-img-180 img,
.card:hover .card-img-150 img,
.card:hover .card-img-120 img,
.card:hover .card-img-100 img {
    transform: scale(1.045);
}
.bg-light.card,
.card.bg-light {
    background: #FBFCFE !important;
}

/* 案例图集 */
.figure {
    margin: 0 0 var(--design-space-6);
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius-lg);
    background: var(--design-bg);
    box-shadow: var(--design-shadow-sm);
    overflow: hidden;
    transition: transform 0.24s var(--design-ease), box-shadow 0.24s var(--design-ease);
}
.figure:hover {
    transform: translateY(-4px);
    box-shadow: var(--design-shadow-md);
}
.figure .figure-caption {
    padding: 14px 12px 16px;
    font-size: 14px;
    color: var(--design-text-muted);
}
.figure .figure-caption a {
    color: var(--design-text);
    font-weight: 500;
}
.figure .figure-caption a:hover {
    color: var(--design-primary);
}

/* 首页新闻双栏 */
.home-news .media h5 {
    margin-bottom: 6px;
    font-size: 16px;
    font-weight: 600;
}
.home-news .media h5 a {
    color: var(--design-text);
}
.home-news .media h5 a:hover {
    color: var(--design-primary);
}
.home-news .media p {
    margin: 0;
    font-size: 13.5px;
    color: var(--design-text-muted) !important;
    line-height: 1.8;
}

/* ---------- 9. 列表行（新闻 / 标签 / 搜索结果） ---------- */
.list-row {
    position: relative;
    padding: 15px 16px;
    margin-bottom: 2px;
    border: 1px solid transparent;
    border-bottom: 1px solid var(--design-border-light) !important;
    border-radius: var(--design-radius);
    transition: var(--design-transition);
}
.list-row:hover {
    background: var(--design-bg);
    border-color: var(--design-border-light);
    box-shadow: var(--design-shadow-xs);
}
.list-row > i.fa {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-right: 10px;
    border-radius: 50%;
    background: var(--design-primary-bg);
    color: var(--design-primary);
    font-size: 9px;
    vertical-align: 1px;
}
.list-row a {
    color: var(--design-text-body);
    transition: var(--design-transition-fast);
}
.list-row a:hover {
    color: var(--design-primary);
}
.list-row .float-right {
    color: var(--design-text-soft);
    font-size: 12.5px;
    font-variant-numeric: tabular-nums;
}

/* ---------- 10. 按钮与徽标 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0.52rem 1.15rem;
    border-radius: var(--design-radius);
    font-size: 13.5px;
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1.5;
    transition: transform 0.18s var(--design-ease), box-shadow 0.18s var(--design-ease),
        background-color 0.18s var(--design-ease), border-color 0.18s var(--design-ease), color 0.18s var(--design-ease);
}
.btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px var(--design-primary-ring);
}
.btn-lg {
    padding: 0.72rem 1.7rem;
    font-size: 15px;
    border-radius: 12px;
}
.btn-sm {
    padding: 0.32rem 0.8rem;
    font-size: 12.5px;
    border-radius: 8px;
}
.btn-primary,
.btn-info {
    background: var(--design-primary) !important;
    border: 1px solid var(--design-primary) !important;
    color: #fff !important;
    box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08);
}
.btn-primary:hover,
.btn-info:hover {
    background: var(--design-primary-light) !important;
    border-color: var(--design-primary-light) !important;
    color: #fff !important;
    box-shadow: 0 4px 10px -6px rgba(16, 24, 40, 0.35);
}
.btn-primary:active,
.btn-info:active {
    background: var(--design-primary-dark) !important;
    border-color: var(--design-primary-dark) !important;
    color: #fff !important;
    box-shadow: none;
}
.btn-outline-primary {
    color: var(--design-text) !important;
    border: 1px solid var(--design-border) !important;
    background: #fff !important;
}
.btn-outline-primary:hover {
    background: var(--design-primary-bg) !important;
    border-color: var(--design-primary-light) !important;
    color: var(--design-primary) !important;
}
.btn-light {
    background: #F8FAFC !important;
    border: 1px solid var(--design-border) !important;
    color: var(--design-text-body) !important;
    box-shadow: none;
}
.btn-light:hover {
    background: var(--design-primary-bg) !important;
    border-color: var(--design-primary-hover) !important;
    color: var(--design-primary) !important;
}
.btn-secondary {
    background: #475569 !important;
    border-color: #475569 !important;
}
.btn-secondary:hover {
    background: #334155 !important;
    border-color: #334155 !important;
}
.btn-danger {
    background: var(--design-danger) !important;
    border: 1px solid var(--design-danger) !important;
    box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08);
}
.btn-danger:hover {
    background: #991B1B !important;
    border-color: #991B1B !important;
    box-shadow: 0 4px 10px -6px rgba(153, 27, 27, 0.4);
}
.badge {
    padding: 0.3em 0.62em;
    border-radius: var(--design-radius-pill);
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 0.02em;
    vertical-align: 1px;
}
.badge-danger { background: #DC2626; }
.badge-warning { background: #D97706; }
.badge-info { background: var(--design-primary); }
.badge-light {
    background: #F1F5F9;
    color: var(--design-text-muted);
}

/* ---------- 11. 表单与认证卡片 ---------- */
.form-group {
    margin-bottom: var(--design-space-4);
}
.form-group label {
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
    color: #334155;
}
.form-group label i {
    margin-right: 6px;
    color: var(--design-primary);
    font-size: 13px;
}
.form-control {
    height: 42px;
    padding: 0.45rem 0.85rem;
    border: 1px solid var(--design-border);
    border-radius: var(--design-radius);
    background: #fff;
    font-size: 14px;
    color: var(--design-text);
    transition: border-color 0.16s var(--design-ease), box-shadow 0.16s var(--design-ease);
}
.form-control::placeholder {
    color: #A3AEC2;
}
.form-control:hover {
    border-color: #CBD5E1;
}
.form-control:focus {
    border-color: var(--design-primary-light);
    box-shadow: 0 0 0 4px var(--design-primary-ring);
    background: #fff;
}
textarea.form-control {
    height: auto;
    min-height: 120px;
    padding: 12px 14px;
    line-height: 1.75;
    resize: vertical;
}
select.form-control {
    height: 42px;
}
.custom-select {
    height: 42px;
    border-radius: var(--design-radius);
    border-color: var(--design-border);
}
.input-group-text {
    border-color: var(--design-border);
    background: #F8FAFC;
    color: var(--design-text-muted);
    border-radius: var(--design-radius);
}

/* 登录 / 注册 / 找回密码 / 留言：统一认证卡片 */
.auth-card {
    position: relative;
    overflow: hidden;
    max-width: 520px;
    margin: 0 auto var(--design-space-6) !important;
    padding: 36px 36px 30px;
    background: #fff;
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius-xl);
    box-shadow: var(--design-shadow-lg);
}
.auth-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--design-primary);
}
.auth-card .btn {
    min-width: 132px;
}
@media (max-width: 575.98px) {
    .auth-card {
        padding: 26px 22px 22px;
        border-radius: var(--design-radius-lg);
    }
}

/* 隐藏阿里云验证码 logo / 水印（登录、注册、找回密码共用） */
#aliyun-captcha-element [class*="logo"],
#aliyun-captcha-element [id*="logo"],
#aliyun-captcha-element [class*="Logo"],
#aliyun-captcha-element [id*="Logo"],
#aliyun-captcha-element .aliyunCaptcha-logo,
[id^="aliyunCaptcha"][class*="logo"],
[id^="aliyunCaptcha"][id*="logo"] {
    display: none !important;
}

/* ---------- 12. 表格 ---------- */
.table {
    margin-bottom: 0;
    color: var(--design-text-body);
    font-size: 13.5px;
    border-collapse: separate;
    border-spacing: 0;
}
.table thead th {
    padding: 12px 14px;
    background: #F8FAFC;
    border-top: none !important;
    border-bottom: 1px solid var(--design-border-light) !important;
    color: var(--design-text-muted);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
}
.table tbody td {
    padding: 13px 14px;
    border-color: var(--design-border-light);
    vertical-align: middle;
}
.table tbody tr {
    transition: background-color 0.14s var(--design-ease);
}
.table tbody tr:hover {
    background: var(--design-primary-bg);
}
.table-bordered {
    border-color: var(--design-border-light) !important;
}

/* ---------- 13. 分页 ---------- */
.pagination {
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin: var(--design-space-6) 0;
}
.pagination .page-link,
.page-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    margin: 0;
    border: 1px solid var(--design-border);
    border-radius: var(--design-radius) !important;
    background: #fff;
    color: #475569;
    font-size: 13px;
    font-weight: 500;
    line-height: 1;
    transition: var(--design-transition);
}
.pagination .page-link:hover,
.page-num:hover {
    background: var(--design-primary-bg);
    border-color: var(--design-primary-hover);
    color: var(--design-primary);
    text-decoration: none;
}
.page-num-current {
    background: var(--design-primary) !important;
    border-color: var(--design-primary) !important;
    color: #fff !important;
    box-shadow: none;
}
.pagination .page-link.disabled,
.pagination .page-item.disabled .page-link {
    color: var(--design-text-soft);
    background: #F8FAFC;
    border-color: var(--design-border-light);
}
@media (max-width: 576px) {
    .pagination .page-link,
    .page-num {
        min-width: 34px;
        height: 34px;
        padding: 0 8px;
    }
}

/* ---------- 14. 页脚 / 悬浮组件 ---------- */
.footer {
    margin-top: 56px !important;
    padding-top: 64px !important;
    border-top: none !important;
    background: #0B1B36 !important;
    color: #A9B4C8 !important;
}
.footer h5 {
    position: relative;
    display: inline-block;
    margin-bottom: var(--design-space-5);
    padding-bottom: 10px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: #fff;
}
.footer h5::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 24px;
    height: 2px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.22);
}
.footer ul.lh-2 li {
    margin-bottom: 8px;
    color: #94A3B8;
    font-size: 13px;
    line-height: 1.8;
    word-break: normal;
    overflow-wrap: anywhere;
}
.footer ul.lh-2 li i {
    display: inline-block;
    width: 18px;
    margin-right: 8px;
    color: #7E96BA;
    text-align: center;
}
.footer a {
    color: #A9B6CC;
    transition: var(--design-transition-fast);
}
.footer a:hover {
    color: #fff;
}
.footer .code img {
    height: 96px;
    padding: 8px;
    background: #fff;
    border-radius: var(--design-radius);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}
.footer .small {
    display: inline-block;
    margin-top: 10px;
    color: #7C8BA5;
    font-size: 12px;
    letter-spacing: 0.04em;
}
.footer .small i {
    color: #7E96BA;
    margin-right: 4px;
}
.footer .copyright {
    padding: 20px 0 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: #64748B;
    font-size: 12.5px;
    letter-spacing: 0.04em;
}
/* 登录后的精简页脚 */
.footer-min {
    background: var(--design-bg-deep) !important;
    color: #94A3B8 !important;
    border-top: none !important;
    padding: 22px 0 !important;
    font-size: 12.5px;
}
/* 页脚吸底：页面内容不足一屏时，把页脚推到视口底部，
   否则页脚下方会留出一条页面底色（浅灰接近白色）的空白。
   注意：margin-top 一旦交给 auto，原来 .footer 的 56px 间距在长页面上会解析成 0，
   所以改用透明的上边框把这段留白保留下来（background-clip 到 padding-box，底下的页面底色透出来） */
.footer {
    margin-top: auto !important;
    border-top: 56px solid transparent !important;
    background-clip: padding-box !important;
    flex-shrink: 0;
}
.footer-min {
    margin-top: auto !important;
    flex-shrink: 0;
}

/* 在线客服悬浮条 */
.online {
    right: 24px;
    bottom: 110px;
    width: 64px;
}
.online dl {
    width: 64px;
    padding: 10px 4px;
    margin-bottom: 10px !important;
    border-radius: var(--design-radius-lg);
    background: var(--design-primary);
    box-shadow: 0 10px 24px -14px rgba(16, 24, 40, 0.4);
    transition: var(--design-transition);
}
.online dl:hover {
    transform: translateY(-2px);
    background: var(--design-primary-light);
}
.online dl dd {
    color: #fff;
    font-size: 11.5px;
    letter-spacing: 0.04em;
}
.online dl dd i {
    color: #fff;
    font-size: 19px;
    margin-bottom: 4px;
}
.online dl.scroll-top {
    background: #334155;
    box-shadow: 0 10px 24px -14px rgba(16, 24, 40, 0.35);
}
.online dl dt {
    right: 74px;
    padding: 18px 20px;
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius-lg);
    box-shadow: var(--design-shadow-lg);
}
.online dl dt h3 {
    border-bottom: 1px solid var(--design-border-light);
    padding-bottom: 10px;
    font-size: 15px;
    font-weight: 600;
    color: var(--design-text);
}
.online dl dt h3 i {
    color: var(--design-primary);
}
.online dl dt input {
    height: 38px;
    border-color: var(--design-border);
    border-radius: var(--design-radius);
    font-size: 13px;
}
.online dl dt button {
    height: 38px;
    border-radius: var(--design-radius);
    background: var(--design-primary);
    font-size: 14px;
    font-weight: 600;
}

/* 手机底部快捷栏 */
/* 手机固定底栏的占位：与底栏同色同高（实测底栏约 69-70px） */
.mobile-bar-placeholder {
    height: 70px;
    background: #0B1B36;
}

.container-fluid.bg-info.fixed-bottom {
    background: #0B1B36 !important;
    box-shadow: 0 -8px 20px -14px rgba(16, 24, 40, 0.45);
    padding-bottom: env(safe-area-inset-bottom);
}
.container-fluid.bg-info.fixed-bottom > .row > [class*="col"] {
    border-color: rgba(255, 255, 255, 0.12) !important;
}
.container-fluid.bg-info.fixed-bottom a {
    color: rgba(255, 255, 255, 0.9) !important;
    font-size: 12px;
    letter-spacing: 0.02em;
    transition: var(--design-transition-fast);
}
.container-fluid.bg-info.fixed-bottom a i {
    display: block;
    margin-bottom: 4px;
    font-size: 17px;
}

/* 搜索表单（列表页底部 / 搜索结果页） */
.search-form {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 48px !important;
}
.search-form .form-group {
    margin: 0 !important;
}
.search-form input.form-control {
    width: 320px;
    max-width: 100%;
}
.search-form .btn {
    height: 42px;
}

/* ---------- 15. 正文排版 ---------- */
.content {
    color: var(--design-text-body);
    font-size: 15.5px;
    line-height: 2;
    letter-spacing: 0.01em;
}
.content p {
    margin-bottom: 1.1em;
}
.content h2,
.content h3,
.content h4 {
    margin: 1.6em 0 0.7em;
    font-weight: 600;
    color: var(--design-text);
}
.content a {
    color: var(--design-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(26, 58, 107, 0.22);
}
.content a:hover {
    text-decoration-color: var(--design-primary);
}
.content img {
    max-width: 100% !important;
    height: auto;
    border-radius: var(--design-radius);
    box-shadow: var(--design-shadow-sm);
}
.content iframe {
    border-radius: var(--design-radius);
}
.content li {
    list-style: disc outside none;
    margin-left: 20px;
    margin-bottom: 6px;
}
.content blockquote {
    padding: 16px 20px;
    margin: 1.4em 0;
    border-left: 3px solid var(--design-primary);
    border-radius: 0 var(--design-radius) var(--design-radius) 0;
    background: var(--design-primary-bg);
    color: #334155;
}

/* ---------- 15b. 单页（公司简介 / 联系我们） ---------- */
/* 单页沿用 .container.pages 的上下留白，仅统一正文阅读宽度 */
.single-page .content {
    max-width: 900px;
    margin: 0 auto;
    font-size: 15.5px;
    line-height: 2.05;
}
.single-page .content img {
    display: block;
    width: auto;
    max-width: 100%;
    margin: 26px auto;
    border: 1px solid var(--design-border-light);
}

/* 公司简介：首段作为导语，配图居中 */
.page-aboutus .content > p:first-child {
    font-size: 16.5px;
    line-height: 2;
    color: var(--design-text);
}
.page-aboutus .content > p:first-child img {
    margin-top: 0;
}
.page-aboutus .content img {
    width: auto;
    max-width: 100%;
    margin: 28px auto;
}

/* 联系我们：公司名抬头 + 地图 + 信息行 */
.page-contact .content > p:first-child {
    margin-bottom: 8px;
    font-size: 19px;
    font-weight: 600;
    color: var(--design-text);
}
.page-contact .content > p:nth-child(2) {
    margin: 0;
    padding: 12px 0 12px 26px;
    border-top: 1px solid var(--design-border-light);
    font-size: 15px;
    color: var(--design-text-body);
    text-indent: -26px;
}
.page-contact .content > p:nth-child(2)::before,
.page-contact .content > p:nth-last-child(3)::before,
.page-contact .content > p:nth-last-child(2)::before,
.page-contact .content > p:last-child::before {
    font-family: FontAwesome;
    color: var(--design-primary);
    font-size: 15px;
    /* 固定图标占位宽度，保证四条信息行的悬挂缩进（26px）与首行文字严格对齐 */
    display: inline-block;
    width: 16px;
    text-align: center;
    margin-right: 10px;
}
.page-contact .content > p:nth-child(2)::before {
    content: "\f041";
}
.page-contact .content > p:nth-last-child(3)::before {
    content: "\f095";
}
.page-contact .content > p:nth-last-child(2)::before {
    content: "\f1ac";
}
.page-contact .content > p:last-child::before {
    content: "\f0e0";
}
.page-contact .content img {
    width: auto;
    max-width: 100%;
    margin: 24px auto 16px;
    box-shadow: var(--design-shadow-sm);
}
.page-contact .content > p:nth-last-child(3),
.page-contact .content > p:nth-last-child(2),
.page-contact .content > p:last-child {
    margin: 0;
    padding: 12px 0 12px 26px;
    border-top: 1px solid var(--design-border-light);
    font-size: 15px;
    text-indent: -26px;
}
/* 隐藏富文本里两个空占位段（按当前联系页结构定位，避免误伤带文字的地址段） */
.page-contact .content > p:nth-child(3),
.page-contact .content > p:nth-child(5) {
    display: none;
}
.single-page .content > p:last-child {
    margin-bottom: 0;
}

@media (max-width: 767.98px) {
    .single-page .content {
        font-size: 15px;
        line-height: 1.95;
    }
    .page-aboutus .content > p:first-child {
        font-size: 15.5px;
    }
    .page-contact .content > p:first-child {
        font-size: 17px;
    }
}

/* 文章头：标题 + 元信息 */
.article-title {
    margin: 0 0 14px;
    font-size: 28px;
    line-height: 1.4;
    font-weight: 600;
    letter-spacing: 0.01em;
    text-align: left;
}
.article-title::after {
    content: "";
    display: block;
    width: 32px;
    height: 2px;
    margin: 14px 0 0;
    border-radius: 2px;
    background: var(--design-primary);
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    margin: 0 0 var(--design-space-5) !important;
    padding: 0 0 14px !important;
    border-bottom: 1px solid var(--design-border-light) !important;
    color: var(--design-text-soft) !important;
    font-size: 13px;
}
.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* 产品参数行 */
.detail-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 13px 0 !important;
    margin: 0 !important;
    border-bottom: 1px solid var(--design-border-light) !important;
    color: var(--design-text-muted) !important;
    font-size: 13.5px;
}
.detail-row strong {
    color: var(--design-text);
    font-weight: 600;
}
.detail-note {
    margin: 20px 0 0 !important;
    color: var(--design-text-muted);
    font-size: 13px;
}
.prev-next {
    padding: 18px 20px;
    margin-top: var(--design-space-6);
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius-lg);
    background: #fff;
    color: var(--design-text-muted) !important;
    font-size: 13.5px;
    line-height: 2.1;
}
.prev-next p {
    margin: 0;
}
.prev-next a {
    color: var(--design-text-body);
}
.prev-next a:hover {
    color: var(--design-primary);
}

/* 空状态 */
.empty-state {
    padding: 48px 24px;
    text-align: center;
    color: var(--design-text-soft);
    font-size: 14px;
}
.empty-state i {
    display: block;
    margin-bottom: 12px;
    font-size: 30px;
    color: var(--design-border);
}

/* 提示页 */
.tip-panel {
    max-width: 560px;
    margin: 24px auto;
    padding: 40px 32px;
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius-xl);
    background: #fff;
    box-shadow: var(--design-shadow-lg);
    text-align: center;
}
.tip-panel i.fa {
    display: block;
    margin-bottom: 14px;
    font-size: 34px;
    color: var(--design-primary);
}
.tip-panel p {
    margin: 0 0 24px;
    color: var(--design-text-body);
    font-size: 15px;
    line-height: 1.9;
}

/* 评论 / 留言面板 */
.comment-panel {
    border: 1px solid var(--design-border-light) !important;
    border-radius: var(--design-radius-xl) !important;
    background: #fff !important;
    box-shadow: var(--design-shadow-md) !important;
    padding: 26px 28px !important;
}
.comment-panel h4 {
    margin-bottom: 18px;
    font-size: 18px;
    font-weight: 600;
}
.msg-row {
    padding: 20px 4px !important;
    border-bottom: 1px solid var(--design-border-light) !important;
}
.msg-row h5 {
    font-size: 15px;
    font-weight: 600;
}

/* ---------- 16. 会员中心与工具页 ---------- */
#motor-page .card,
#pdf-page .card {
    border-radius: var(--design-radius-lg) !important;
    border: 1px solid var(--design-border-light) !important;
    box-shadow: var(--design-shadow-sm) !important;
}
#motor-page h5,
#pdf-page h5,
#note-page h5,
#feishu-page h5 {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-left: 12px;
    margin-bottom: var(--design-space-4);
    border-left: 3px solid var(--design-primary);
    font-size: 17px;
    font-weight: 600;
    color: var(--design-text);
}
#motor-page h5 i,
#pdf-page h5 i,
#note-page h5 i,
#feishu-page h5 i {
    color: var(--design-primary);
}

/* PDF 工具箱分类页签：第一枚带图标，其余纯文字，统一行高 40px 对齐 */
#pdf-toolbox-root .tab-nav .tab-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 40px;
}

/* ---------- 17. 考试系统 ---------- */
.exam-h1 {
    margin: 0 0 6px;
    font-size: 26px;
    font-weight: 700;
    color: var(--design-text);
}
.exam-sub {
    margin-bottom: 28px;
    color: var(--design-text-muted);
    font-size: 13.5px;
}
.exam-card {
    padding: 22px 24px;
    margin-bottom: var(--design-space-4);
    background: #fff;
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius-lg);
    box-shadow: var(--design-shadow-sm);
    transition: var(--design-transition);
}
.exam-card:hover {
    border-color: #D7E4FF;
    box-shadow: var(--design-shadow-md);
    transform: translateY(-2px);
}
.exam-card h2 {
    margin: 0 0 10px;
    font-size: 18px;
    font-weight: 600;
    color: var(--design-text);
}
.exam-card h2 .fa {
    margin-right: 8px;
    font-size: 16px;
    color: var(--design-primary);
}
.exam-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 22px;
    margin-bottom: 16px;
    color: var(--design-text-muted);
    font-size: 13px;
}
.exam-meta .fa {
    display: inline-block;
    width: 16px;
    margin-right: 4px;
    text-align: center;
    color: var(--design-primary);
}
.exam-take {
    display: flex;
    align-items: center;
    gap: var(--design-space-3);
}
.exam-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 26px;
    border: none;
    border-radius: var(--design-radius);
    background: var(--design-primary);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08);
    transition: var(--design-transition);
}
.exam-btn:hover {
    color: #fff;
    text-decoration: none;
    background: var(--design-primary-light);
    box-shadow: 0 4px 10px -6px rgba(16, 24, 40, 0.35);
}
.exam-btn .fa {
    font-size: 14px;
    line-height: 1;
}
.exam-empty {
    padding: 48px 24px;
    text-align: center;
    color: var(--design-text-soft);
    font-size: 14px;
}
.exam-empty .fa {
    display: block;
    margin: 0 auto 12px;
    font-size: 30px;
    color: var(--design-border);
}

/* 答题页 */
.exam-topbar {
    position: sticky;
    top: 78px;
    z-index: 99;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    margin-bottom: var(--design-space-4);
    border-radius: var(--design-radius-lg);
    background: var(--design-primary);
    color: #fff;
    box-shadow: var(--design-shadow-md);
    font-size: 13.5px;
}
.exam-topbar .timer {
    padding: 4px 12px;
    border-radius: var(--design-radius);
    background: rgba(255, 255, 255, 0.16);
    font-family: var(--design-font-mono);
    font-size: 20px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.04em;
}
.exam-topbar input {
    padding: 8px 10px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--design-radius-sm);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 13px;
}
.exam-q {
    padding: 20px 22px;
    margin: var(--design-space-4) 0;
    background: #fff;
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius-lg);
    box-shadow: var(--design-shadow-sm);
    transition: var(--design-transition-fast);
}
.exam-q:hover {
    box-shadow: var(--design-shadow);
}
.exam-q .qt {
    margin-bottom: 14px;
    color: var(--design-text);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.7;
}
.exam-options label {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 11px 14px;
    margin-bottom: 8px;
    border: 1px solid var(--design-border);
    border-radius: var(--design-radius);
    color: var(--design-text-body);
    font-size: 14px;
    line-height: 1.7;
    cursor: pointer;
    transition: var(--design-transition-fast);
}
.exam-options label:hover {
    background: var(--design-primary-bg);
    border-color: var(--design-primary-light);
    color: var(--design-primary);
}
.exam-options label input {
    margin: 4px 0 0;
    accent-color: var(--design-primary);
}
.exam-badge,
.exam-score-tag {
    display: inline-block;
    padding: 1px 8px;
    margin-left: 6px;
    border-radius: var(--design-radius-pill);
    font-size: 11.5px;
    font-weight: 600;
}
.exam-badge {
    color: var(--design-primary);
    border: 1px solid var(--design-primary-hover);
    background: var(--design-primary-bg);
}
.exam-score-tag {
    color: var(--design-warning);
    border: 1px solid #FDE68A;
    background: var(--design-warning-bg);
}
.exam-submit-bar {
    margin: var(--design-space-6) 0;
    text-align: center;
}

/* 成绩页 */
.exam-score-box {
    padding: 30px 24px;
    margin-bottom: var(--design-space-5);
    border: 1px solid var(--design-border-light);
    border-radius: var(--design-radius-xl);
    background: #fff;
    box-shadow: var(--design-shadow-md);
    text-align: center;
    font-size: 14px;
    color: var(--design-text-muted);
}
.exam-score-box .big {
    margin: 10px 0;
    font-size: 46px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--design-primary);
    font-variant-numeric: tabular-nums;
}
.exam-score-box .info {
    margin-top: 8px;
    color: var(--design-text-muted);
    font-size: 13.5px;
}
.exam-bar {
    margin: var(--design-space-6) 0;
    text-align: center;
}

/* 电子证书（打印保留） */
.cert-wrap {
    margin: 10px 0 28px;
}
.cert-card {
    position: relative;
    padding: 10px;
    border: 2px solid #C9A24B;
    border-radius: var(--design-radius-xl);
    background: linear-gradient(135deg, #FFFDF5, #FDF6E3);
    box-shadow: 0 18px 44px -22px rgba(201, 162, 75, 0.45);
}
.cert-border {
    position: relative;
    padding: 34px 30px 26px;
    border: 1px solid #C9A24B;
    border-radius: var(--design-radius);
    background:
        radial-gradient(circle at 12% 12%, rgba(201, 162, 75, 0.10), transparent 22%),
        radial-gradient(circle at 88% 88%, rgba(201, 162, 75, 0.10), transparent 22%),
        #FFFEF9;
}
.cert-head {
    font-family: "STKaiti", "KaiTi", "SimSun", serif;
    text-align: center;
    font-size: 34px;
    font-weight: 700;
    letter-spacing: 6px;
    color: #9A6A16;
}
.cert-sub {
    margin-top: 4px;
    text-align: center;
    font-size: 12px;
    letter-spacing: 3px;
    color: #BFA15A;
}
.cert-line {
    width: 80px;
    height: 2px;
    margin: 16px auto;
    background: linear-gradient(90deg, transparent, #C9A24B, transparent);
}
.cert-body {
    padding: 6px 10px;
    font-family: "STKaiti", "KaiTi", "SimSun", serif;
    font-size: 17px;
    line-height: 2;
    color: #333;
    text-align: center;
}
.cert-name {
    padding: 0 6px;
    border-bottom: 1px solid #B8860B;
    color: #B8860B;
    font-size: 20px;
    font-weight: 700;
}
.cert-exam {
    padding: 0 4px;
    color: #9A6A16;
    font-weight: 700;
}
.cert-score {
    padding: 0 2px;
    color: #C0392B;
    font-size: 20px;
    font-weight: 700;
}
.cert-foot {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: 26px;
    padding: 0 6px;
}
.cert-org,
.cert-date {
    color: #555;
    font-size: 14px;
}
.cert-date {
    margin-top: 4px;
}
.cert-seal {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 104px;
    height: 104px;
    padding: 6px;
    border: 3px solid #C0392B;
    border-radius: 50%;
    box-shadow: inset 0 0 0 2px #C0392B;
    color: #C0392B;
    font-family: "STKaiti", "KaiTi", serif;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.35;
    text-align: center;
    opacity: 0.82;
    transform: rotate(-14deg);
}
.cert-no {
    margin-top: 18px;
    text-align: center;
    color: #999;
    font-size: 12px;
    letter-spacing: 1px;
}
.cert-actions {
    margin-top: 14px;
    text-align: center;
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 991.98px) {
    /* 等比高度在 768–991 只有 200–258px，标题/副标题会和分页圆点挤在一起；
       这一段给个下限，图片仍按 cover 居中裁、不变形 */
    .home-hero .swiper-slide {
        min-height: 320px;
    }
    .navbar-collapse {
        margin-top: 10px;
        padding: 10px 12px;
        background: #fff;
        border: 1px solid var(--design-border-light);
        border-radius: var(--design-radius-lg);
        box-shadow: var(--design-shadow-md);
    }
    .navbar-expand-lg .navbar-nav .nav-link {
        margin: 2px 0;
        padding: 9px 14px !important;
    }
    .navbar .navbar-text {
        margin: 8px 0 2px;
    }
    .home-hero h1 {
        font-size: 32px;
    }
    .home-hero h4 {
        font-size: 15px;
    }
    .jumbotron.jumbotron-fluid {
        padding: 60px 0 54px !important;
    }
    .jumbotron.jumbotron-fluid h1 {
        font-size: 28px;
    }
}

@media (max-width: 767.98px) {
    .container.pages {
        padding-top: var(--design-space-5);
        padding-bottom: 48px;
    }
    .home-section {
        padding: 56px 0 !important;
    }
    .section-head {
        font-size: 24px;
    }
    .section-head::after {
        margin-top: 12px;
    }
    .home-hero .swiper-slide {
        height: 62vw;
        min-height: 340px;
        aspect-ratio: auto;
    }
    .home-hero h1 {
        font-size: 26px;
    }
    .home-hero h4 {
        font-size: 14px;
        line-height: 1.7;
    }
    .article-title {
        font-size: 24px;
    }
    .article-meta {
        gap: 12px;
    }
    .card .card-body {
        padding: 16px;
    }
    .card-img-200,
    .card-img-180,
    .card-img-150 {
        height: 170px;
    }
    .footer {
        padding-top: 48px !important;
    }
    .footer .code {
        margin-top: 12px;
    }
    .online {
        display: none !important;
    }
    .exam-topbar {
        top: 68px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        text-align: left;
    }
    .exam-card {
        padding: 18px;
    }
    .exam-meta {
        gap: 6px 16px;
    }
    .auth-card {
        box-shadow: var(--design-shadow-md);
    }
    .list-row {
        padding: 13px 10px;
    }
    .comment-panel {
        padding: 20px 18px !important;
    }
}

@media (max-width: 575.98px) {
    .home-hero .swiper-slide {
        height: 74vw;
        min-height: 300px;
        aspect-ratio: auto;
    }
    .home-hero .position-absolute {
        top: 24% !important;
    }
    .home-hero h1 {
        font-size: 22px;
    }
    .home-hero h4 {
        font-size: 13px;
    }
    .jumbotron.jumbotron-fluid {
        padding: 48px 0 44px !important;
    }
    .jumbotron.jumbotron-fluid h1 {
        font-size: 24px;
    }
    .detail-row {
        font-size: 13px;
    }
    .footer .copyright {
        display: none;
    }
    .search-form input.form-control {
        width: 100%;
    }
}

/* 打印：仅保留证书 */
@media print {
    body * {
        visibility: hidden;
    }
    .cert-wrap,
    .cert-wrap * {
        visibility: visible;
    }
    .cert-wrap {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        margin: 0;
    }
    .cert-card {
        box-shadow: none;
    }
    .no-print {
        display: none !important;
    }
}