/*!
 * kaoyan.css — 考研分类页「知识点索引」（/categories/kao-yan）
 * 概念：教材扉页 / 课程索引。标题栏 5 行细边框、吸顶书目、目录行 01..N、类型徽章。
 * 约定：除 .layout.kaoyan-layout#content-inner 与 #kaoyan-hub 自身外，所有选择器都以 #kaoyan-hub 开头，
 *       避免影响其他页面；颜色一律复用 --heo-* 变量以跟随亮色 / 暗色主题。
 */

/* 隐藏边栏后的内容宽度：主题默认 1000/1400px，这里收到 1120px 更像一本书的版心 */
.layout.kaoyan-layout#content-inner {
    max-width: 1120px;
}

/* 主题给首页卡片加了 overflow: hidden，会让内部 position: sticky 的书目失效，这里放开 */
#kaoyan-hub {
    /* 兜底偏移：无 JS 时 scroll-margin-top 用它（60px nav + 约 62px 吸顶条 + 8px），
       JS 启动后按实测值 inline 覆盖，避免「点书目 tab 后标题被吸顶条压住」。 */
    --ky-offset: 130px;
    /* 覆盖主题卡片入场动画 `.layout > div:first-child:not(.recent-posts) { animation: slide-in .6s .1s }`：
       它的 translateY(20px)→0 在 load/fonts.ready 之后才结束，会把 hash 深链的落点抬高 20px
       （1440 h2Top 110 < shelfBottom 122；无 JS 原生深链同样被遮）。关掉后落点稳定在 scroll-margin。
       入场观感：卡片只是不再上滑，其余样式不变（captain 已确认）。 */
    animation: none !important;
    overflow: visible;
    padding: 1.4rem 2rem;
    color: var(--heo-fontcolor);
    overflow-wrap: break-word;
}

/* ---------- 扉页 hero ---------- */

#kaoyan-hub .ky-hero {
    padding-bottom: 1rem;
}

#kaoyan-hub .ky-crumbs {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    line-height: 1.6;
    color: var(--heo-secondtext);
}

#kaoyan-hub .ky-crumb-link {
    color: var(--heo-secondtext);
}

#kaoyan-hub .ky-crumb-link:hover {
    color: var(--heo-main);
}

#kaoyan-hub .ky-crumb-sep {
    color: var(--heo-card-border);
}

#kaoyan-hub .ky-crumb-now {
    color: var(--heo-fontcolor);
    font-weight: 600;
}

#kaoyan-hub .ky-hero-main {
    display: flex;
    align-items: flex-start;
    gap: 1.6rem;
    margin-top: 0.9rem;
}

#kaoyan-hub .ky-hero-text {
    flex: 1 1 auto;
    min-width: 0;
}

#kaoyan-hub .ky-kicker {
    margin: 0;
    font-size: 0.72rem;
    line-height: 1.7;
    letter-spacing: 0.12em;
    color: var(--heo-secondtext);
}

#kaoyan-hub .ky-title {
    margin: 0.3rem 0 0.4rem;
    font-size: 2rem;
    line-height: 1.3;
    color: var(--heo-fontcolor);
    font-weight: 700;
}

#kaoyan-hub .ky-lede {
    margin: 0;
    max-width: 34em;
    font-size: 0.88rem;
    line-height: 1.8;
    color: var(--heo-secondtext);
}

/* 标题栏：5 行细边框，像教材扉页的版权信息 */
#kaoyan-hub .ky-spec {
    flex: 0 0 16.5rem;
    margin: 0;
    border-top: 1px solid var(--heo-card-border);
}

#kaoyan-hub .ky-spec-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.8rem;
    padding: 0.32rem 0;
    border-bottom: 1px solid var(--heo-card-border);
    font-size: 0.74rem;
    line-height: 1.7;
}

#kaoyan-hub .ky-spec-row dt {
    color: var(--heo-secondtext);
    letter-spacing: 0.08em;
}

#kaoyan-hub .ky-spec-row dd {
    margin: 0;
    color: var(--heo-fontcolor);
    font-weight: 600;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ---------- 吸顶书目 ---------- */

#kaoyan-hub .ky-shelf {
    position: sticky;
    top: 60px;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 0.2rem;
    margin: 1.2rem -2rem 0;
    padding: 0.45rem 2rem;
    background: var(--heo-card-bg);
    border-top: 1px solid var(--heo-card-border);
    border-bottom: 1px solid var(--heo-card-border);
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}

#kaoyan-hub .ky-shelf::-webkit-scrollbar {
    display: none;
}

/* 右侧还有未显示的 tab 时给 2.2rem（44px）渐隐提示；mask 不接收指针事件，不影响点击 */
#kaoyan-hub .ky-shelf.ky-shelf--more {
    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 2.2rem), transparent);
    mask-image: linear-gradient(to right, #000 calc(100% - 2.2rem), transparent);
}

#kaoyan-hub .ky-tab {
    display: inline-flex;
    align-items: baseline;
    gap: 0.4rem;
    flex: 0 0 auto;
    padding: 0.35rem 0.55rem;
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--heo-secondtext);
    font-size: 0.82rem;
    line-height: 1.6;
    white-space: nowrap;
}

#kaoyan-hub .ky-tab:hover {
    color: var(--heo-fontcolor);
    background: var(--heo-secondbg);
}

#kaoyan-hub .ky-tab[aria-current="location"] {
    color: var(--heo-main);
    background: var(--heo-secondbg);
    border-color: var(--heo-card-border);
}

#kaoyan-hub .ky-tab-num {
    font-size: 0.66rem;
    letter-spacing: 0.08em;
    color: var(--heo-secondtext);
    font-variant-numeric: tabular-nums;
}

#kaoyan-hub .ky-tab[aria-current="location"] .ky-tab-num,
#kaoyan-hub .ky-tab[aria-current="location"] .ky-tab-count {
    color: inherit;
}

#kaoyan-hub .ky-tab-count {
    font-size: 0.66rem;
    color: var(--heo-secondtext);
    font-variant-numeric: tabular-nums;
}

/* ---------- 工具栏 ---------- */

#kaoyan-hub .ky-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.6rem;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--heo-card-border);
}

#kaoyan-hub .ky-sr {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

#kaoyan-hub .ky-search {
    position: relative;
    display: flex;
    align-items: center;
    flex: 1 1 18rem;
    min-width: 0;
}

#kaoyan-hub .ky-search-input {
    width: 100%;
    height: 2.2rem;
    padding: 0 4rem 0 0.7rem;
    border: 1px solid var(--heo-card-border);
    border-radius: 8px;
    background: var(--heo-secondbg);
    color: var(--heo-fontcolor);
    font-family: inherit;
    font-size: 0.88rem;
    line-height: 1.4;
    -webkit-appearance: none;
    appearance: none;
}

#kaoyan-hub .ky-search-input:focus {
    border-color: var(--heo-main);
}

#kaoyan-hub .ky-search-input:focus:not(:focus-visible) {
    outline: none;
}

#kaoyan-hub .ky-search-input::placeholder {
    color: var(--heo-secondtext);
    opacity: 1;
}

#kaoyan-hub .ky-search-clear {
    position: absolute;
    right: 0.35rem;
    top: 50%;
    transform: translateY(-50%);
    height: 1.6rem;
    padding: 0 0.45rem;
    border: 1px solid var(--heo-card-border);
    border-radius: 6px;
    background: var(--heo-card-bg);
    color: var(--heo-secondtext);
    font-family: inherit;
    font-size: 0.7rem;
    line-height: 1;
    cursor: pointer;
}

#kaoyan-hub .ky-search-clear:hover {
    color: var(--heo-fontcolor);
    border-color: var(--heo-main);
}

#kaoyan-hub .ky-map-only {
    flex: 0 0 auto;
    height: 2.2rem;
    padding: 0 0.8rem;
    border: 1px solid var(--heo-card-border);
    border-radius: 8px;
    background: var(--heo-card-bg);
    color: var(--heo-fontcolor);
    font-family: inherit;
    font-size: 0.8rem;
    line-height: 1;
    cursor: pointer;
}

#kaoyan-hub .ky-map-only:hover {
    border-color: var(--heo-main);
}

#kaoyan-hub .ky-map-only[aria-pressed="true"] {
    border-color: var(--heo-main);
    color: var(--heo-main);
    background: var(--heo-secondbg);
    font-weight: 600;
}

#kaoyan-hub .ky-result {
    margin: 0 0 0 auto;
    font-size: 0.74rem;
    line-height: 1.6;
    color: var(--heo-secondtext);
    font-variant-numeric: tabular-nums;
}

/* ---------- 书目 section ---------- */

#kaoyan-hub .ky-book {
    margin-top: 2.2rem;
    scroll-margin-top: var(--ky-offset, 68px);
}

#kaoyan-hub .ky-book-head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 0.6rem;
    align-items: baseline;
}

#kaoyan-hub .ky-book-num {
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--heo-secondtext);
    font-variant-numeric: tabular-nums;
}

#kaoyan-hub .ky-book-title {
    margin: 0;
    padding: 0;
    font-size: 1.22rem;
    line-height: 1.5;
    font-weight: 700;
    color: var(--heo-fontcolor);
}

#kaoyan-hub .ky-book-scope {
    grid-column: 1 / -1;
    margin: 0.2rem 0 0;
    font-size: 0.78rem;
    line-height: 1.8;
    color: var(--heo-secondtext);
}

#kaoyan-hub .ky-list {
    margin: 0.5rem 0 0;
    padding: 0;
    list-style: none;
    counter-reset: ky-row;
}

#kaoyan-hub .ky-row {
    counter-increment: ky-row;
    display: grid;
    grid-template-columns: 2.4rem minmax(0, 1fr);
    align-items: baseline;
    padding: 0.55rem 0;
    border-top: 1px solid var(--heo-card-border);
}

#kaoyan-hub .ky-row::before {
    content: counter(ky-row, decimal-leading-zero);
    font-size: 0.7rem;
    line-height: 1.8;
    color: var(--heo-secondtext);
    letter-spacing: 0.06em;
    font-variant-numeric: tabular-nums;
}

#kaoyan-hub .ky-row-link {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.25rem 0.55rem;
    min-width: 0;
    color: var(--heo-fontcolor);
}

#kaoyan-hub .ky-row-link:hover .ky-row-title {
    color: var(--heo-hovertext);
}

#kaoyan-hub .ky-row-title {
    min-width: 0;
    font-size: 0.95rem;
    line-height: 1.7;
    font-weight: 600;
    color: var(--heo-fontcolor);
    overflow-wrap: anywhere;
}

#kaoyan-hub .ky-row-chips {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.28rem;
    min-width: 0;
    overflow-wrap: anywhere;
}

#kaoyan-hub .ky-chip {
    padding: 0 0.4rem;
    border: 1px solid var(--heo-card-border);
    border-radius: 4px;
    background: var(--heo-secondbg);
    color: var(--heo-secondtext);
    font-size: 0.68rem;
    line-height: 1.7;
    max-width: 100%;
    white-space: normal;
    overflow-wrap: anywhere;
}

#kaoyan-hub .ky-type {
    margin-left: auto;
    padding: 0 0.45rem;
    border: 1px solid var(--heo-card-border);
    border-radius: 4px;
    background: var(--heo-secondbg);
    color: var(--heo-secondtext);
    font-size: 0.68rem;
    font-weight: 600;
    line-height: 1.7;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

/* 导图徽章：亮 / 暗两套配色都按 ≥4.5:1 正文对比度选取 */
#kaoyan-hub .ky-type--map {
    background: #fbf1d9;
    border-color: #ecd39a;
    color: #7a4f00;
}

[data-theme="dark"] #kaoyan-hub .ky-type--map {
    background: #3a2f14;
    border-color: #5c4720;
    color: #f5cf7a;
}

/* ---------- 空状态（理论力学等） ---------- */

#kaoyan-hub .ky-empty {
    display: none;
    margin-top: 0.5rem;
    padding: 1.1rem 0 1.2rem;
    border-top: 1px solid var(--heo-card-border);
}

#kaoyan-hub .ky-book:not(:has(.ky-row)) .ky-list {
    display: none;
}

#kaoyan-hub .ky-book:not(:has(.ky-row)) .ky-empty {
    display: block;
}

#kaoyan-hub .ky-empty-note {
    margin: 0 0 0.5rem;
    font-size: 0.82rem;
    line-height: 1.8;
    color: var(--heo-secondtext);
}

#kaoyan-hub .ky-empty-link {
    display: inline-block;
    font-size: 0.8rem;
    line-height: 1.8;
    color: var(--heo-main);
    border-bottom: 1px solid currentColor;
}

/* 未归档 / 其他：没有行时整节隐藏（真实数据下不出现，不打扰 5 本书目） */
#kaoyan-hub .ky-book--other:not(:has(.ky-row)) {
    display: none;
}

/* ---------- 无结果 / 页脚 ---------- */

#kaoyan-hub .ky-no-results {
    margin: 2rem 0 1rem;
    padding: 1.4rem 1rem;
    border: 1px dashed var(--heo-card-border);
    border-radius: 10px;
    text-align: center;
}

#kaoyan-hub .ky-no-results-text {
    margin: 0 0 0.7rem;
    font-size: 0.84rem;
    line-height: 1.8;
    color: var(--heo-secondtext);
}

#kaoyan-hub .ky-reset {
    height: 2rem;
    padding: 0 0.9rem;
    border: 1px solid var(--heo-card-border);
    border-radius: 8px;
    background: var(--heo-card-bg);
    color: var(--heo-fontcolor);
    font-family: inherit;
    font-size: 0.78rem;
    line-height: 1;
    cursor: pointer;
}

#kaoyan-hub .ky-reset:hover {
    border-color: var(--heo-main);
    color: var(--heo-main);
}

#kaoyan-hub .ky-footer {
    margin-top: 2.2rem;
    padding-top: 0.9rem;
    border-top: 1px solid var(--heo-card-border);
}

#kaoyan-hub .ky-footer p {
    margin: 0;
    font-size: 0.76rem;
    line-height: 1.9;
    color: var(--heo-secondtext);
}

/* ---------- 无 JS 兜底 ---------- */

/* 工具栏与「导图」统计行完全依赖脚本，未执行时直接隐藏（内容与锚点不受影响） */
#kaoyan-hub:not(.ky-js) .ky-toolbar,
#kaoyan-hub:not(.ky-js) .ky-stat-row {
    display: none;
}

/* 脚本用 hidden 属性过滤行 / 节 / 按钮，必须压过上面的 display 设定 */
#kaoyan-hub [hidden] {
    display: none !important;
}

/* ---------- 可访问性 ---------- */

#kaoyan-hub a:focus-visible,
#kaoyan-hub button:focus-visible,
#kaoyan-hub input:focus-visible {
    outline: 2px solid var(--heo-main);
    outline-offset: 2px;
    border-radius: 6px;
}

@media (prefers-reduced-motion: reduce) {
    #kaoyan-hub,
    #kaoyan-hub * {
        scroll-behavior: auto !important;
        transition: none !important;
        animation: none !important;
    }
}

/* 681–768：主题在 ≤768 把卡片 padding 改成 0 20px（!important），负边距要跟着收，
   否则书目条比卡片左右各宽 20px，页面横向溢出（t5 V2）。 */
@media screen and (min-width: 681px) and (max-width: 768px) {
    #kaoyan-hub {
        padding: 1.1rem 1rem !important;
    }

    #kaoyan-hub .ky-shelf {
        margin-left: -1rem;
        margin-right: -1rem;
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* ---------- 移动端 ≤680：单列，行拆成「num title type」/「num chips chips」 ---------- */

@media screen and (max-width: 680px) {
    /* 主题对卡片内边距用了 !important，这里必须同样加重 */
    #kaoyan-hub {
        padding: 1.1rem 0.9rem !important;
        border-radius: 0;
    }

    #kaoyan-hub .ky-hero-main {
        flex-direction: column;
        gap: 0.9rem;
    }

    #kaoyan-hub .ky-spec {
        flex: 0 0 auto;
        width: 100%;
    }

    #kaoyan-hub .ky-title {
        font-size: 1.6rem;
    }

    #kaoyan-hub .ky-shelf {
        margin-left: -0.9rem;
        margin-right: -0.9rem;
        padding-left: 0.9rem;
        padding-right: 0.9rem;
    }

    #kaoyan-hub .ky-tab {
        padding: 0.3rem 0.45rem;
        font-size: 0.78rem;
    }

    #kaoyan-hub .ky-toolbar {
        gap: 0.5rem;
    }

    #kaoyan-hub .ky-search {
        flex: 1 1 100%;
    }

    #kaoyan-hub .ky-result {
        margin: 0 0 0 auto;
        flex: 1 1 auto;
        text-align: right;
    }

    #kaoyan-hub .ky-row {
        grid-template-columns: 1.9rem minmax(0, 1fr);
    }

    #kaoyan-hub .ky-row-link {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
            "title type"
            "chips chips";
        column-gap: 0.5rem;
        row-gap: 0.2rem;
        align-items: start;
    }

    #kaoyan-hub .ky-row-title {
        grid-area: title;
        min-width: 0;
    }

    #kaoyan-hub .ky-type {
        grid-area: type;
        margin-left: 0;
        justify-self: end;
    }

    #kaoyan-hub .ky-row-chips {
        grid-area: chips;
    }
}