/* ==========================================================================
   Alpha 公开前台设计系统 (Public Design System)
   适用：knowledge.php / article.php 等无需登录的公开页
   载入顺序：Tailwind CDN → assets/css/style.css → assets/css/public.css
   约定：令牌以 --pub-* 命名；组件类以 .pub-* / .kb-* 命名，避免与 Tailwind 冲突
   ========================================================================== */

/* ─────────────── 1. 设计令牌 ─────────────── */
:root {
    /* 品牌色阶（teal） */
    --pub-brand-50:  #f0fdfa;
    --pub-brand-100: #ccfbf1;
    --pub-brand-200: #99f6e4;
    --pub-brand-300: #5eead4;
    --pub-brand-400: #2dd4bf;
    --pub-brand-500: #14b8a6;
    --pub-brand-600: #0d9488;
    --pub-brand-700: #0f766e;
    --pub-brand-800: #115e59;

    /* 语义色 · 浅色主题（灰阶按 WCAG AA 反推，正文 7.4:1 / 次要 5.4:1 / 元信息 4.3:1） */
    --pub-bg:            #f4fbfa;
    --pub-bg-elev:       #ffffff;
    --pub-bg-elev-80:    rgba(255, 255, 255, .82);
    --pub-bg-subtle:     #f6f9fa;
    --pub-border:        #e5eef0;
    --pub-border-strong: #d2e0e2;
    --pub-text:          #0f172a;
    --pub-text-soft:     #465468;
    --pub-text-mute:     #5c6b80;
    --pub-text-faint:    #6d7d93;
    --pub-accent:        var(--pub-brand-700);
    --pub-accent-soft:   rgba(13, 148, 136, .1);

    /* 间距节奏（4pt 栅格） */
    --pub-s1: .25rem;  --pub-s2: .5rem;   --pub-s3: .75rem;  --pub-s4: 1rem;
    --pub-s5: 1.25rem; --pub-s6: 1.5rem;  --pub-s8: 2rem;    --pub-s10: 2.5rem;
    --pub-s12: 3rem;   --pub-s16: 4rem;   --pub-s20: 5rem;

    /* 圆角 */
    --pub-r-xs: 8px;  --pub-r-sm: 10px; --pub-r-md: 14px;
    --pub-r-lg: 18px; --pub-r-xl: 24px; --pub-r-pill: 999px;

    /* 阴影（低饱和多层，避免脏灰） */
    --pub-sh-xs:    0 1px 2px rgba(15, 23, 42, .04);
    --pub-sh-sm:    0 1px 3px rgba(15, 23, 42, .05), 0 6px 16px -8px rgba(15, 23, 42, .08);
    --pub-sh-md:    0 2px 6px rgba(15, 23, 42, .05), 0 14px 30px -12px rgba(15, 23, 42, .13);
    --pub-sh-lg:    0 4px 10px rgba(15, 23, 42, .06), 0 26px 50px -20px rgba(15, 23, 42, .18);
    --pub-sh-brand: 0 8px 22px -10px rgba(13, 148, 136, .48);

    /* 实心主色（白字 ≥4.6:1，满足 WCAG AA） */
    --pub-cta:       linear-gradient(135deg, #108276, #0d6a63);
    --pub-cta-solid: #108276;

    /* 动效 */
    --pub-ease:     cubic-bezier(.4, 0, .2, 1);
    --pub-ease-out: cubic-bezier(.16, 1, .3, 1);
    --pub-dur:      .22s;

    /* 版式 */
    --pub-font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
                     "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
                     "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
    --pub-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

    /* 度量 */
    --pub-measure:   44rem;   /* 正文行宽 ≈ 704px ≈ 38 汉字/行 */
    --pub-container: 76rem;   /* 1216px */
    --pub-header-h:  64px;
}

/* 语义色 · 深色主题 */
.dark {
    --pub-bg:            #070d18;
    --pub-bg-elev:       #0f172a;
    --pub-bg-elev-80:    rgba(15, 23, 42, .8);
    --pub-bg-subtle:     #141f33;
    --pub-border:        #1e2b40;
    --pub-border-strong: #2c3b52;
    --pub-text:          #f1f5f9;
    --pub-text-soft:     #c2cddd;
    --pub-text-mute:     #8b9bb0;
    --pub-text-faint:    #7e8ea6;
    --pub-accent:        var(--pub-brand-400);
    --pub-accent-soft:   rgba(45, 212, 191, .12);
    --pub-sh-xs:    0 1px 2px rgba(0, 0, 0, .4);
    --pub-sh-sm:    0 1px 3px rgba(0, 0, 0, .5), 0 6px 16px -8px rgba(0, 0, 0, .6);
    --pub-sh-md:    0 2px 6px rgba(0, 0, 0, .45), 0 14px 30px -12px rgba(0, 0, 0, .65);
    --pub-sh-lg:    0 4px 10px rgba(0, 0, 0, .5), 0 26px 50px -20px rgba(0, 0, 0, .8);
    --pub-sh-brand: 0 8px 22px -10px rgba(45, 212, 191, .38);
}

/* ─────────────── 2. 基础层 ─────────────── */
html.pub-html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--pub-header-h) + 24px);
    overflow-x: hidden;   /* 放在 html 上，避免 body 被迫生成第二个滚动容器 */
}

.pub-body {
    background: var(--pub-bg);
    color: var(--pub-text-soft);
    font-family: var(--pub-font-sans);
    font-size: 15px;
    line-height: 1.7;
    letter-spacing: .004em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: "kern" 1, "liga" 1;
}

.pub-body ::selection { background: var(--pub-brand-200); color: #0f172a; }
.dark .pub-body ::selection { background: rgba(45, 212, 191, .32); color: #f8fafc; }

/* hidden 属性必须压过组件的 display:flex/grid，否则隐藏态会失效 */
[hidden] { display: none !important; }

.pub-body :focus-visible {
    outline: 2px solid var(--pub-accent);
    outline-offset: 2px;
    border-radius: 6px;
}

/* 细滚动条 */
.pub-body ::-webkit-scrollbar { width: 10px; height: 10px; }
.pub-body ::-webkit-scrollbar-track { background: transparent; }
.pub-body ::-webkit-scrollbar-thumb {
    background: var(--pub-border-strong);
    border: 3px solid transparent;
    background-clip: content-box;
    border-radius: 999px;
}
.pub-body ::-webkit-scrollbar-thumb:hover { background-color: var(--pub-text-faint); }

/* 跳转到主内容（键盘可达） */
.pub-skip {
    position: fixed; left: 12px; top: 12px; z-index: 100;
    transform: translateY(-220%);
    padding: .5rem .875rem; border-radius: var(--pub-r-sm);
    background: var(--pub-text); color: #fff;
    font-size: .8125rem; font-weight: 700; text-decoration: none;
    transition: transform .2s var(--pub-ease);
}
.pub-skip:focus { transform: none; }

/* 装饰层：顶部极光 + 细网格（纯 CSS，无额外请求） */
.pub-aurora {
    position: fixed; inset: 0; z-index: 0;
    pointer-events: none; overflow: hidden;
}
.pub-aurora::before,
.pub-aurora::after {
    content: ""; position: absolute; border-radius: 50%;
    filter: blur(90px);
}
.pub-aurora::before {
    width: 640px; height: 640px; top: -300px; left: -160px;
    background: radial-gradient(circle, #5eead4, transparent 68%);
    opacity: .5;
}
.pub-aurora::after {
    width: 540px; height: 540px; top: -220px; right: -140px;
    background: radial-gradient(circle, #a5c8f8, transparent 68%);
    opacity: .38;
}
.dark .pub-aurora::before { opacity: .15; }
.dark .pub-aurora::after  { opacity: .12; }

.pub-gridfade {
    position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(var(--pub-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--pub-border) 1px, transparent 1px);
    background-size: 56px 56px;
    opacity: .6;
    -webkit-mask-image: radial-gradient(ellipse 68% 70% at 50% 0%, #000 12%, transparent 72%);
            mask-image: radial-gradient(ellipse 68% 70% at 50% 0%, #000 12%, transparent 72%);
}

/* ─────────────── 3. 布局 ─────────────── */
.pub-container {
    width: 100%; max-width: var(--pub-container);
    margin-inline: auto; padding-inline: 1.25rem;
}
@media (min-width: 768px) { .pub-container { padding-inline: 2rem; } }

.pub-measure { max-width: var(--pub-measure); margin-inline: auto; }

.pub-main {
    position: relative; z-index: 1;
    padding-top: var(--pub-header-h);
    min-height: 100vh;
    display: flex; flex-direction: column;
}

/* ─────────────── 4. 顶栏 ─────────────── */
.pub-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 60;
    height: var(--pub-header-h);
    background: var(--pub-bg-elev-80);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
            backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color .3s var(--pub-ease), box-shadow .3s var(--pub-ease);
}
.pub-nav.is-scrolled {
    border-bottom-color: var(--pub-border);
    box-shadow: var(--pub-sh-sm);
}
.pub-nav__inner {
    height: 100%; display: flex; align-items: center;
    justify-content: space-between; gap: 1rem;
}

.pub-brand { display: inline-flex; align-items: center; gap: .625rem; text-decoration: none; min-width: 0; }
.pub-brand__mark {
    width: 34px; height: 34px; flex: 0 0 auto;
    border-radius: 11px; display: grid; place-items: center;
    background: linear-gradient(140deg, var(--pub-brand-400), var(--pub-brand-600) 55%, var(--pub-brand-700));
    color: #fff; font-size: 16px; font-weight: 800; line-height: 1; letter-spacing: -.02em;
    box-shadow: var(--pub-sh-brand), inset 0 1px 0 rgba(255, 255, 255, .35);
    transition: transform var(--pub-dur) var(--pub-ease-out);
}
.pub-brand:hover .pub-brand__mark { transform: rotate(-6deg) scale(1.06); }
.pub-brand__name {
    font-size: 1.0625rem; font-weight: 800; letter-spacing: -.02em;
    color: var(--pub-text); white-space: nowrap;
}
.pub-brand__tag { display: none; }
@media (min-width: 640px) {
    .pub-brand__tag {
        display: inline-block; padding: .1875rem .5rem;
        border-radius: var(--pub-r-pill);
        font-size: .625rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
        color: var(--pub-accent); background: var(--pub-accent-soft);
        white-space: nowrap;
    }
}

.pub-navlinks { display: flex; align-items: center; gap: .125rem; }
.pub-navlink {
    position: relative;
    padding: .4375rem .75rem; border-radius: var(--pub-r-sm);
    font-size: .875rem; font-weight: 600; text-decoration: none;
    color: var(--pub-text-mute); white-space: nowrap;
    transition: color var(--pub-dur) var(--pub-ease), background var(--pub-dur) var(--pub-ease);
}
.pub-navlink:hover { color: var(--pub-text); background: var(--pub-bg-subtle); }
.pub-navlink.is-active { color: var(--pub-accent); background: var(--pub-accent-soft); }

.pub-navsep {
    width: 1px; height: 20px; margin-inline: .375rem;
    background: var(--pub-border); flex: 0 0 auto;
}

.pub-iconbtn {
    display: inline-grid; place-items: center;
    width: 36px; height: 36px; flex: 0 0 auto;
    border: 0; border-radius: var(--pub-r-sm);
    background: transparent; color: var(--pub-text-mute); cursor: pointer;
    transition: color var(--pub-dur) var(--pub-ease), background var(--pub-dur) var(--pub-ease), transform var(--pub-dur) var(--pub-ease);
}
.pub-iconbtn:hover { color: var(--pub-text); background: var(--pub-bg-subtle); }
.pub-iconbtn:active { transform: scale(.94); }

/* ─────────────── 5. 按钮 ─────────────── */
.pub-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
    height: 38px; padding: 0 1.125rem;
    border: 1px solid transparent; border-radius: var(--pub-r-pill);
    font-family: inherit; font-size: .875rem; font-weight: 700; line-height: 1;
    text-decoration: none; white-space: nowrap; cursor: pointer;
    transition: transform var(--pub-dur) var(--pub-ease), box-shadow var(--pub-dur) var(--pub-ease),
                background var(--pub-dur) var(--pub-ease), color var(--pub-dur) var(--pub-ease),
                border-color var(--pub-dur) var(--pub-ease), filter var(--pub-dur) var(--pub-ease);
}
.pub-btn:active { transform: scale(.97); }
.pub-btn--primary {
    color: #fff;
    background: var(--pub-cta);
    box-shadow: var(--pub-sh-brand);
}
.pub-btn--primary:hover { filter: brightness(1.04); box-shadow: 0 12px 30px -10px rgba(13, 148, 136, .6); }
.pub-btn--ink { color: #fff; background: var(--pub-text); box-shadow: var(--pub-sh-sm); }
.dark .pub-btn--ink { color: #0b1220; background: #f8fafc; }
.pub-btn--ink:hover { opacity: .88; }
.pub-btn--ghost {
    color: var(--pub-text-soft); background: var(--pub-bg-elev);
    border-color: var(--pub-border); box-shadow: var(--pub-sh-xs);
}
.pub-btn--ghost:hover { color: var(--pub-accent); border-color: var(--pub-brand-300); background: var(--pub-bg-elev); }
.pub-btn--sm { height: 32px; padding: 0 .875rem; font-size: .8125rem; }

/* ─────────────── 6. 表面与标题 ─────────────── */
.pub-surface {
    background: var(--pub-bg-elev);
    border: 1px solid var(--pub-border);
    border-radius: var(--pub-r-lg);
    box-shadow: var(--pub-sh-sm);
}

.pub-eyebrow {
    display: inline-flex; align-items: center; gap: .5rem;
    font-size: .6875rem; font-weight: 800;
    letter-spacing: .16em; text-transform: uppercase;
    color: var(--pub-accent);
}
.pub-eyebrow::before {
    content: ""; width: 22px; height: 2px; border-radius: 2px;
    background: currentColor; opacity: .55;
}

.pub-sechead {
    display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap;
}
.pub-sechead__title {
    display: inline-flex; align-items: center; gap: .5rem;
    font-size: 1rem; font-weight: 800; letter-spacing: -.01em;
    color: var(--pub-text); margin: 0;
}
.pub-sechead__title::before {
    content: ""; width: 3px; height: 16px; border-radius: 2px;
    background: linear-gradient(var(--pub-brand-400), var(--pub-brand-600));
}
.pub-sechead__aside { font-size: .8125rem; color: var(--pub-text-faint); }

.pub-rule { height: 1px; background: linear-gradient(90deg, var(--pub-border), transparent); border: 0; }

/* ─────────────── 7. 徽标 / 胶囊 ─────────────── */
.pub-tag {
    display: inline-flex; align-items: center; gap: .3rem;
    padding: .1875rem .5rem; border: 1px solid transparent;
    border-radius: var(--pub-r-xs);
    font-size: .6875rem; font-weight: 700; line-height: 1.35; white-space: nowrap;
}
.pub-tag--brand { color: var(--pub-brand-700); background: var(--pub-brand-50); border-color: #c9e9e3; }
.dark .pub-tag--brand { color: var(--pub-brand-300); background: rgba(20, 184, 166, .12); border-color: rgba(20, 184, 166, .26); }
.pub-tag--pin { color: #c2410c; background: #fff7ed; border-color: #fed7aa; }
.dark .pub-tag--pin { color: #fdba74; background: rgba(249, 115, 22, .12); border-color: rgba(249, 115, 22, .28); }
.pub-tag--rec { color: #be185d; background: #fdf2f8; border-color: #fbcfe8; }
.dark .pub-tag--rec { color: #f9a8d4; background: rgba(236, 72, 153, .12); border-color: rgba(236, 72, 153, .28); }
.pub-tag--new { color: #047857; background: #ecfdf5; border-color: #a7f3d0; }
.dark .pub-tag--new { color: #6ee7b7; background: rgba(16, 185, 129, .12); border-color: rgba(16, 185, 129, .28); }
.pub-tag--muted { color: var(--pub-text-mute); background: var(--pub-bg-subtle); border-color: var(--pub-border); }

/* 分类筛选胶囊 */
.pub-chip {
    display: inline-flex; align-items: center; gap: .375rem;
    height: 32px; padding: 0 .875rem; flex: 0 0 auto;
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-pill);
    background: var(--pub-bg-elev); color: var(--pub-text-soft);
    font-family: inherit; font-size: .8125rem; font-weight: 600; line-height: 1;
    white-space: nowrap; cursor: pointer;
    transition: color var(--pub-dur) var(--pub-ease), background var(--pub-dur) var(--pub-ease),
                border-color var(--pub-dur) var(--pub-ease), box-shadow var(--pub-dur) var(--pub-ease);
}
.pub-chip:hover { color: var(--pub-accent); border-color: var(--pub-brand-300); background: var(--pub-brand-50); }
.dark .pub-chip:hover { background: rgba(20, 184, 166, .1); border-color: rgba(20, 184, 166, .35); }
.pub-chip.is-active {
    color: #fff; border-color: transparent;
    background: var(--pub-cta);
    box-shadow: var(--pub-sh-brand);
}
.pub-chip.is-active:hover { color: #fff; filter: brightness(1.04); }
.pub-chip--xs { height: 24px; padding: 0 .5rem; font-size: .6875rem; gap: .25rem; }

/* ─────────────── 8. 搜索 ─────────────── */
.pub-search { position: relative; }
.pub-search__field {
    width: 100%; height: 52px;
    -webkit-appearance: none; appearance: none;
    padding: 0 4.5rem 0 3rem;
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-pill);
    background: var(--pub-bg-elev); color: var(--pub-text);
    font-family: inherit; font-size: .9375rem; line-height: 1;
    box-shadow: var(--pub-sh-sm);
    transition: border-color var(--pub-dur) var(--pub-ease), box-shadow var(--pub-dur) var(--pub-ease);
}
.pub-search__field::placeholder { color: var(--pub-text-faint); }
.pub-search__field::-webkit-search-cancel-button,
.pub-search__field::-webkit-search-decoration { -webkit-appearance: none; appearance: none; }
.pub-search__field:focus {
    outline: none; border-color: var(--pub-brand-400);
    box-shadow: 0 0 0 4px var(--pub-accent-soft), var(--pub-sh-md);
}
.pub-search__icon {
    position: absolute; left: 1.125rem; top: 50%; transform: translateY(-50%);
    color: var(--pub-text-faint); pointer-events: none; display: flex;
}
.pub-search__tail {
    position: absolute; right: .625rem; top: 50%; transform: translateY(-50%);
    display: flex; align-items: center; gap: .375rem;
}
.pub-kbd {
    min-width: 22px; height: 22px; padding: 0 .375rem;
    display: inline-grid; place-items: center;
    border: 1px solid var(--pub-border-strong); border-bottom-width: 2px;
    border-radius: 6px; background: var(--pub-bg-subtle);
    color: var(--pub-text-mute); font-size: .6875rem; font-weight: 700;
    font-family: var(--pub-font-mono);
}
@media (max-width: 639px) { .pub-search__hint { display: none; } }

/* 搜索联想下拉 */
.pub-suggest {
    position: absolute; left: 0; right: 0; top: calc(100% + .5rem); z-index: 45;
    background: var(--pub-bg-elev);
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-lg);
    box-shadow: var(--pub-sh-lg);
    overflow: hidden auto; max-height: 26rem;
}
.pub-suggest__item {
    display: flex; align-items: center; gap: .75rem;
    padding: .625rem .875rem; text-decoration: none;
    border-bottom: 1px solid var(--pub-border);
    transition: background var(--pub-dur) var(--pub-ease);
}
.pub-suggest__item:last-child { border-bottom: 0; }
.pub-suggest__item:hover { background: var(--pub-bg-subtle); }
.pub-suggest__thumb {
    width: 44px; height: 44px; flex: 0 0 auto; overflow: hidden;
    border-radius: var(--pub-r-sm); background: var(--pub-bg-subtle);
    border: 1px solid var(--pub-border);
}
.pub-suggest__thumb img { width: 100%; height: 100%; object-fit: cover; }
.pub-suggest__title {
    font-size: .875rem; font-weight: 600; color: var(--pub-text);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pub-suggest__item:hover .pub-suggest__title { color: var(--pub-accent); }
.pub-suggest__desc {
    margin-top: .125rem; font-size: .75rem; color: var(--pub-text-mute);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pub-suggest__more {
    display: block; width: 100%; padding: .75rem;
    border: 0; border-top: 1px solid var(--pub-border);
    background: var(--pub-bg-subtle); color: var(--pub-accent);
    font-family: inherit; font-size: .8125rem; font-weight: 700; cursor: pointer;
    transition: background var(--pub-dur) var(--pub-ease);
}
.pub-suggest__more:hover { background: var(--pub-accent-soft); }
.pub-suggest__empty { padding: 1.5rem; text-align: center; font-size: .8125rem; color: var(--pub-text-mute); }

/* ─────────────── 9. 骨架屏 / 空态 ─────────────── */
.pub-skel { position: relative; overflow: hidden; background: var(--pub-bg-subtle); border-radius: 8px; }
.pub-skel::after {
    content: ""; position: absolute; inset: 0; transform: translateX(-100%);
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .62), transparent);
    animation: pubShimmer 1.5s infinite;
}
.dark .pub-skel::after { background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .06), transparent); }
@keyframes pubShimmer { 100% { transform: translateX(100%); } }

.pub-empty { padding: 4rem 1.5rem; text-align: center; }
.pub-empty__icon {
    width: 64px; height: 64px; margin: 0 auto 1.125rem;
    display: grid; place-items: center; border-radius: 50%;
    background: var(--pub-bg-subtle); border: 1px solid var(--pub-border);
    color: var(--pub-text-faint);
}
.pub-empty__title { font-size: 1rem; font-weight: 700; color: var(--pub-text); }
.pub-empty__hint { margin-top: .375rem; font-size: .8125rem; color: var(--pub-text-mute); }

/* ─────────────── 10. 分页 ─────────────── */
.pub-pagerbar {
    margin-top: 2rem; padding-top: 1.25rem;
    border-top: 1px solid var(--pub-border);
    display: flex; flex-wrap: wrap; align-items: center;
    justify-content: space-between; gap: .75rem;
}
.pub-pager { display: flex; flex-wrap: wrap; align-items: center; gap: .375rem; }
.pub-pager__btn {
    min-width: 36px; height: 36px; padding: 0 .625rem;
    display: inline-grid; place-items: center;
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-sm);
    background: var(--pub-bg-elev); color: var(--pub-text-soft);
    font-family: inherit; font-size: .8125rem; font-weight: 600; line-height: 1;
    cursor: pointer;
    transition: color var(--pub-dur) var(--pub-ease), background var(--pub-dur) var(--pub-ease),
                border-color var(--pub-dur) var(--pub-ease), box-shadow var(--pub-dur) var(--pub-ease);
}
.pub-pager__btn:hover { color: var(--pub-accent); border-color: var(--pub-brand-300); background: var(--pub-brand-50); }
.dark .pub-pager__btn:hover { background: rgba(20, 184, 166, .1); }
.pub-pager__btn.is-active {
    color: #fff; border-color: transparent;
    background: var(--pub-cta);
    box-shadow: var(--pub-sh-brand);
}
.pub-pager__gap { padding: 0 .125rem; color: var(--pub-text-faint); font-size: .8125rem; }

/* ─────────────── 11. 回到顶部 ─────────────── */
.pub-totop {
    position: fixed; right: 24px; bottom: 26px; z-index: 9989;
    width: 44px; height: 44px; display: grid; place-items: center;
    border: 1px solid var(--pub-border); border-radius: 50%;
    background: var(--pub-bg-elev-80);
    -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
    color: var(--pub-text-mute); box-shadow: var(--pub-sh-md); cursor: pointer;
    opacity: 0; transform: translateY(10px) scale(.9); pointer-events: none;
    transition: opacity .3s var(--pub-ease-out), transform .3s var(--pub-ease-out),
                color var(--pub-dur) var(--pub-ease), border-color var(--pub-dur) var(--pub-ease);
}
.pub-totop.is-show { opacity: 1; transform: none; pointer-events: auto; }
.pub-totop:hover { color: var(--pub-accent); border-color: var(--pub-brand-300); }

/* ─────────────── 12. 知识库 · Hero ─────────────── */
.kb-hero { position: relative; padding-top: 2.75rem; padding-bottom: 1.75rem; }
@media (min-width: 768px) { .kb-hero { padding-top: 3.75rem; padding-bottom: 2.25rem; } }

.kb-hero__title {
    margin: .875rem 0 0;
    font-size: clamp(2rem, 1.2rem + 2.6vw, 3rem);
    font-weight: 800; line-height: 1.14; letter-spacing: -.035em;
    color: var(--pub-text); text-wrap: balance;
}
.kb-hero__title em {
    font-style: normal;
    background: linear-gradient(100deg, var(--pub-brand-600), var(--pub-brand-700) 52%, #0e7490);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.dark .kb-hero__title em {
    background: linear-gradient(100deg, #5eead4, #2dd4bf 50%, #67c9f8);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.kb-hero__lede {
    margin: .875rem 0 0; max-width: 34rem;
    font-size: .9375rem; line-height: 1.8; color: var(--pub-text-mute);
}
.kb-hero__search { margin-top: 1.75rem; max-width: 40rem; }
.kb-stats { margin-top: 1.125rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.kb-stat {
    display: inline-flex; align-items: center; gap: .5rem;
    padding: .4375rem .875rem;
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-pill);
    background: var(--pub-bg-elev-80);
    -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
    font-size: .8125rem; color: var(--pub-text-mute); box-shadow: var(--pub-sh-xs);
}
.kb-stat strong { color: var(--pub-text); font-weight: 800; font-variant-numeric: tabular-nums; }

/* 分类筛选条：窄屏横向滚动，宽屏换行 */
.kb-catbar {
    display: flex; gap: .5rem; overflow-x: auto;
    padding-bottom: .25rem; scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}
.kb-catbar::-webkit-scrollbar { display: none; }
@media (min-width: 768px) { .kb-catbar { flex-wrap: wrap; overflow: visible; } }

.kb-toolbar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; margin-bottom: 1.125rem;
}
.kb-toolbar__label {
    display: none; flex: 0 0 auto;
    font-size: .75rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
    color: var(--pub-text-faint);
}
@media (min-width: 1024px) { .kb-toolbar__label { display: block; } }

/* ─────────────── 13. 知识库 · 文章卡片 ─────────────── */
.kb-list { display: flex; flex-direction: column; gap: .875rem; }

.kb-card {
    position: relative; display: flex; flex-direction: column; gap: 1rem;
    padding: 1rem; background: var(--pub-bg-elev);
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-lg);
    box-shadow: var(--pub-sh-xs);
    transition: transform .32s var(--pub-ease-out), box-shadow .32s var(--pub-ease),
                border-color .32s var(--pub-ease);
}
@media (min-width: 640px) { .kb-card { flex-direction: row; gap: 1.25rem; padding: 1.125rem; } }
.kb-card:hover { transform: translateY(-3px); box-shadow: var(--pub-sh-md); border-color: var(--pub-brand-200); }
.dark .kb-card:hover { border-color: rgba(20, 184, 166, .32); }

/* 整卡可点：拉伸链接层，保证 HTML 合法（不嵌套交互元素） */
.kb-card__link { position: absolute; inset: 0; z-index: 1; border-radius: inherit; }

.kb-card__thumb {
    position: relative; flex: 0 0 auto; width: 100%; aspect-ratio: 16 / 9;
    overflow: hidden; border-radius: var(--pub-r-md);
    background: var(--pub-bg-subtle);
}
@media (min-width: 640px) { .kb-card__thumb { width: 232px; aspect-ratio: 16 / 10; } }
.kb-card__thumb img {
    width: 100%; height: 100%; object-fit: cover; display: block;
    transition: transform .6s var(--pub-ease-out);
}
.kb-card:hover .kb-card__thumb img { transform: scale(1.06); }

.kb-card__body { display: flex; flex-direction: column; flex: 1 1 auto; min-width: 0; gap: .5rem; }
.kb-card__badges { display: flex; flex-wrap: wrap; gap: .375rem; }
.kb-card__title {
    margin: 0; font-size: 1.0625rem; font-weight: 700; line-height: 1.45;
    letter-spacing: -.012em; color: var(--pub-text);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    transition: color var(--pub-dur) var(--pub-ease);
}
.kb-card:hover .kb-card__title { color: var(--pub-accent); }
.kb-card__excerpt {
    margin: 0; font-size: .875rem; line-height: 1.75; color: var(--pub-text-mute);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.kb-card__foot {
    margin-top: auto; padding-top: .75rem;
    border-top: 1px dashed var(--pub-border);
    display: flex; align-items: center; justify-content: space-between;
    gap: .625rem .875rem; flex-wrap: wrap;
}
.kb-card__cats { position: relative; z-index: 2; display: flex; flex-wrap: wrap; gap: .375rem; }
.kb-card__meta {
    display: flex; align-items: center; gap: .875rem; flex-wrap: wrap;
    font-size: .75rem; color: var(--pub-text-faint);
}
.kb-card__meta > span { display: inline-flex; align-items: center; gap: .3rem; white-space: nowrap; }

/* ─────────────── 14. 知识库 · 精选 Banner ─────────────── */
.kb-feature {
    position: relative; display: flex; flex-direction: column; justify-content: flex-end;
    overflow: hidden; isolation: isolate;
    border-radius: var(--pub-r-xl); background: #0b1220;
    text-decoration: none; box-shadow: var(--pub-sh-md);
    height: 100%;
}
.kb-feature--lg { min-height: 300px; }
.kb-feature--sm { min-height: 148px; }
@media (min-width: 1024px) {
    .kb-feature--lg { min-height: 404px; }
    .kb-feature--sm { min-height: 194px; }
}
.kb-feature__img {
    position: absolute; inset: 0; z-index: 0;
    background-size: cover; background-position: center;
    transition: transform .9s var(--pub-ease-out);
}
.kb-feature:hover .kb-feature__img { transform: scale(1.06); }
.kb-feature__scrim {
    position: absolute; inset: 0; z-index: 1;
    background: linear-gradient(to top,
        rgba(3, 10, 18, .93) 0%, rgba(3, 10, 18, .66) 34%,
        rgba(3, 10, 18, .16) 68%, rgba(3, 10, 18, .04) 100%);
    transition: opacity .4s var(--pub-ease);
}
.kb-feature:hover .kb-feature__scrim { opacity: .94; }
.kb-feature__badges { position: absolute; top: 1rem; left: 1rem; z-index: 3; display: flex; gap: .375rem; }
.kb-feature__body { position: relative; z-index: 2; padding: 1.25rem; }
@media (min-width: 768px) { .kb-feature__body { padding: 1.75rem; } }
.kb-feature__kicker {
    display: inline-flex; align-items: center; gap: .375rem; margin-bottom: .625rem;
    font-size: .6875rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
    color: var(--pub-brand-300);
}
.kb-feature__title {
    margin: 0; color: #fff; font-weight: 800; letter-spacing: -.02em;
    display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden;
}
.kb-feature--lg .kb-feature__title { font-size: clamp(1.25rem, .9rem + 1.2vw, 1.75rem); line-height: 1.28; -webkit-line-clamp: 2; }
.kb-feature--sm .kb-feature__title { font-size: 1rem; line-height: 1.4; -webkit-line-clamp: 2; }
.kb-feature__desc {
    margin: .5rem 0 0; color: rgba(226, 232, 240, .82); font-size: .8125rem; line-height: 1.65;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.kb-feature--sm .kb-feature__desc { display: none; }
.kb-feature__meta {
    margin-top: .75rem; display: flex; align-items: center; gap: .875rem;
    font-size: .6875rem; color: rgba(226, 232, 240, .62);
}
.kb-feature__meta span { display: inline-flex; align-items: center; gap: .3rem; }

/* ─────────────── 15. 文章页 · 骨架 ─────────────── */
.pub-progress {
    position: fixed; top: var(--pub-header-h); left: 0; z-index: 59;
    width: 0; height: 2px;
    background: linear-gradient(90deg, var(--pub-brand-400), var(--pub-brand-600));
    box-shadow: 0 0 10px rgba(20, 184, 166, .7);
    transition: width .12s linear;
}

.pub-crumbs {
    display: flex; align-items: center; gap: .5rem; flex-wrap: wrap;
    font-size: .8125rem; color: var(--pub-text-mute);
}
.pub-crumbs a { color: var(--pub-text-mute); text-decoration: none; transition: color var(--pub-dur) var(--pub-ease); }
.pub-crumbs a:hover { color: var(--pub-accent); }
.pub-crumbs__sep { color: var(--pub-text-faint); display: inline-flex; }
.pub-crumbs__cur {
    color: var(--pub-text); font-weight: 600; max-width: 24ch;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.pub-article { padding-bottom: 3rem; }
.pub-article__head { padding: 2.25rem 0 1.5rem; }
.pub-article__title {
    margin: .875rem 0 0;
    font-size: clamp(1.75rem, 1.1rem + 2.3vw, 2.625rem);
    font-weight: 800; line-height: 1.22; letter-spacing: -.032em;
    color: var(--pub-text); text-wrap: balance;
}
.pub-article__lede {
    margin: 1.125rem 0 0;
    font-size: 1.0625rem; line-height: 1.8; color: var(--pub-text-mute);
    padding-left: .875rem; border-left: 3px solid var(--pub-brand-300);
}
.dark .pub-article__lede { border-left-color: var(--pub-brand-700); }
.pub-article__meta {
    margin-top: 1.125rem; display: flex; flex-wrap: wrap; align-items: center;
    gap: .5rem 1.25rem; font-size: .8125rem; color: var(--pub-text-mute);
}
.pub-article__meta > span { display: inline-flex; align-items: center; gap: .375rem; }
.pub-article__terms { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: .375rem; }
.pub-article__cover {
    margin: 1.75rem 0 0; overflow: hidden; border-radius: var(--pub-r-lg);
    border: 1px solid var(--pub-border); box-shadow: var(--pub-sh-md);
    aspect-ratio: 21 / 9; background: var(--pub-bg-subtle);
}
.pub-article__cover img { width: 100%; height: 100%; object-fit: cover; display: block; }

.pub-article__body {
    padding: 1.75rem 0 0;
    border-top: 1px solid var(--pub-border);
}
.pub-article__actions {
    margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--pub-border);
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem;
}

/* ─────────────── 16. 正文排版（.pub-prose，覆盖 style.css 基线） ─────────────── */
.pub-prose { font-size: 1.0625rem; line-height: 1.85; color: var(--pub-text-soft); }
.pub-prose #editor-container { min-height: 180px; }

/* WangEditor 只读容器归一化 */
.pub-prose .w-e-text-container { background: transparent !important; padding: 0 !important; }
.pub-prose .w-e-scroll { overflow: visible !important; }
.pub-prose .w-e-text-container [data-slate-editor] { padding: 0 !important; }

/* 段落 */
.pub-prose #editor-container p {
    margin: 0 0 1.3rem !important;
    font-size: 1.0625rem !important; line-height: 1.85 !important;
    color: var(--pub-text-soft) !important;
}
.pub-prose #editor-container p:last-child { margin-bottom: 0 !important; }

/* 标题层级：字号收敛、上边距大于下边距，形成清晰的视觉分组 */
.pub-prose #editor-container h1 {
    font-size: 1.9375rem !important; line-height: 1.28 !important; font-weight: 800 !important;
    letter-spacing: -.026em !important; color: var(--pub-text) !important;
    margin: 2.75rem 0 1rem !important;
}
.pub-prose #editor-container h2 {
    font-size: 1.5rem !important; line-height: 1.36 !important; font-weight: 700 !important;
    letter-spacing: -.02em !important; color: var(--pub-text) !important;
    margin: 2.5rem 0 .875rem !important;
    padding-bottom: .5rem !important;
    border-bottom: 1px solid var(--pub-border) !important;
}
.pub-prose #editor-container h3 {
    font-size: 1.25rem !important; line-height: 1.45 !important; font-weight: 700 !important;
    letter-spacing: -.015em !important; color: var(--pub-text) !important;
    margin: 2.125rem 0 .75rem !important;
    padding-left: .75rem !important;
    border-left: 3px solid var(--pub-brand-500) !important;
}
.pub-prose #editor-container h4 {
    font-size: 1.0625rem !important; line-height: 1.5 !important; font-weight: 700 !important;
    color: var(--pub-text) !important; margin: 1.75rem 0 .5rem !important;
}
.pub-prose #editor-container h5,
.pub-prose #editor-container h6 {
    font-size: .9375rem !important; font-weight: 700 !important;
    color: var(--pub-text-mute) !important; margin: 1.5rem 0 .5rem !important;
    text-transform: none !important;
}
.pub-prose #editor-container > *:first-child,
.pub-prose #editor-container [data-slate-editor] > *:first-child { margin-top: 0 !important; }

/* 列表 */
.pub-prose #editor-container ul { list-style: disc !important; padding-left: 1.375rem !important; margin: 0 0 1.3rem !important; }
.pub-prose #editor-container ol { list-style: decimal !important; padding-left: 1.5rem !important; margin: 0 0 1.3rem !important; }
.pub-prose #editor-container li { margin-bottom: .5rem !important; line-height: 1.8 !important; }
.pub-prose #editor-container li::marker { color: var(--pub-brand-500); font-weight: 700; }
.pub-prose #editor-container li > ul,
.pub-prose #editor-container li > ol { margin: .5rem 0 0 !important; }

/* 引用 */
.pub-prose #editor-container blockquote {
    margin: 1.75rem 0 !important; padding: 1rem 1.25rem !important;
    border: 0 !important; border-left: 3px solid var(--pub-brand-500) !important;
    border-radius: 0 var(--pub-r-md) var(--pub-r-md) 0 !important;
    background: var(--pub-accent-soft) !important;
    color: var(--pub-text-soft) !important; font-style: normal !important;
}
.pub-prose #editor-container blockquote p:last-child { margin-bottom: 0 !important; }

/* 链接 */
.pub-prose #editor-container a {
    color: var(--pub-accent); font-weight: 600;
    text-decoration: underline; text-decoration-thickness: 1px;
    text-underline-offset: 3px; text-decoration-color: var(--pub-brand-300);
    transition: text-decoration-color var(--pub-dur) var(--pub-ease);
}
.pub-prose #editor-container a:hover { text-decoration-color: var(--pub-accent); }

/* 行内代码 / 代码块 */
.pub-prose #editor-container code {
    padding: .15em .4em; border-radius: 6px;
    background: var(--pub-bg-subtle); border: 1px solid var(--pub-border);
    color: #be185d; font-family: var(--pub-font-mono); font-size: .875em;
}
.dark .pub-prose #editor-container code { color: #f9a8d4; }
.pub-prose #editor-container pre {
    margin: 1.75rem 0 !important; padding: 1.125rem 1.25rem !important;
    overflow-x: auto; background: #0b1220 !important;
    border: 1px solid #1e2b40 !important; border-radius: var(--pub-r-md) !important;
    box-shadow: var(--pub-sh-sm);
}
.pub-prose #editor-container pre code {
    padding: 0; border: 0; background: none; color: #e2e8f0;
    font-size: .875rem; line-height: 1.75;
}

/* 分隔线 */
.pub-prose #editor-container hr {
    margin: 2.5rem 0 !important; border: 0 !important; height: 1px !important;
    background: linear-gradient(90deg, transparent, var(--pub-border) 22%, var(--pub-border) 78%, transparent) !important;
}

/* 图片：圆角 + 描边 + 可放大提示 */
.pub-prose #editor-container img {
    max-width: 100%; height: auto; display: block;
    margin: 1.75rem auto; border-radius: var(--pub-r-md);
    border: 1px solid var(--pub-border); box-shadow: var(--pub-sh-sm);
    cursor: zoom-in;
}
.pub-prose #editor-container figure { margin: 1.75rem 0; }
.pub-prose #editor-container figcaption {
    margin-top: .625rem; text-align: center;
    font-size: .8125rem; color: var(--pub-text-faint);
}

/* 表格 */
.pub-prose #editor-container table {
    width: 100%; margin: 1.75rem 0; font-size: .9375rem;
    border-collapse: separate; border-spacing: 0;
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-md);
    overflow: hidden; background: var(--pub-bg-elev);
}
.pub-prose #editor-container th,
.pub-prose #editor-container td {
    padding: .625rem .875rem; text-align: left;
    border-bottom: 1px solid var(--pub-border);
    border-right: 1px solid var(--pub-border);
}
.pub-prose #editor-container th {
    background: var(--pub-bg-subtle); color: var(--pub-text); font-weight: 700;
}
.pub-prose #editor-container tr:last-child td { border-bottom: 0; }
.pub-prose #editor-container th:last-child,
.pub-prose #editor-container td:last-child { border-right: 0; }

/* ─────────────── 17. 附件 / 推荐 ─────────────── */
.pub-file {
    display: flex; align-items: center; gap: .75rem; padding: .75rem;
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-md);
    background: var(--pub-bg-subtle); text-decoration: none;
    transition: border-color var(--pub-dur) var(--pub-ease), background var(--pub-dur) var(--pub-ease),
                box-shadow var(--pub-dur) var(--pub-ease);
}
.pub-file:hover { border-color: var(--pub-brand-300); background: var(--pub-bg-elev); box-shadow: var(--pub-sh-sm); }
.pub-file__icon {
    width: 40px; height: 40px; flex: 0 0 auto; overflow: hidden;
    display: grid; place-items: center; border-radius: var(--pub-r-sm);
    background: var(--pub-bg-elev); border: 1px solid var(--pub-border);
    color: var(--pub-text-faint);
}
.pub-file__icon img { width: 100%; height: 100%; object-fit: cover; }
.pub-file__name {
    font-size: .875rem; font-weight: 600; color: var(--pub-text);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pub-file__size { margin-top: .125rem; font-size: .75rem; color: var(--pub-text-faint); }

.pub-reco {
    position: relative; display: flex; gap: .875rem; padding: .875rem;
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-md);
    background: var(--pub-bg-elev); text-decoration: none;
    transition: transform .3s var(--pub-ease-out), border-color .3s var(--pub-ease), box-shadow .3s var(--pub-ease);
}
.pub-reco:hover { transform: translateY(-2px); border-color: var(--pub-brand-200); box-shadow: var(--pub-sh-sm); }
.dark .pub-reco:hover { border-color: rgba(20, 184, 166, .3); }
.pub-reco__thumb {
    width: 96px; height: 68px; flex: 0 0 auto; overflow: hidden;
    border-radius: var(--pub-r-sm); background: var(--pub-bg-subtle);
}
.pub-reco__thumb img {
    width: 100%; height: 100%; object-fit: cover; display: block;
    transition: transform .5s var(--pub-ease-out);
}
.pub-reco:hover .pub-reco__thumb img { transform: scale(1.07); }
.pub-reco__title {
    margin: 0; font-size: .875rem; font-weight: 700; line-height: 1.5; color: var(--pub-text);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    transition: color var(--pub-dur) var(--pub-ease);
}
.pub-reco:hover .pub-reco__title { color: var(--pub-accent); }
.pub-reco__meta { margin-top: .5rem; font-size: .6875rem; color: var(--pub-text-faint); display: inline-flex; align-items: center; gap: .3rem; }

/* ─────────────── 18. 页脚 ─────────────── */
.pub-footer {
    position: relative; z-index: 1; margin-top: auto;
    border-top: 1px solid var(--pub-border);
    background: var(--pub-bg-elev);
}
.pub-footer__inner {
    display: flex; flex-direction: column; gap: 2rem;
    padding-block: 2.5rem;
}
@media (min-width: 768px) {
    .pub-footer__inner { flex-direction: row; align-items: flex-start; justify-content: space-between; gap: 3rem; }
}
.pub-footer__brandcol { max-width: 22rem; }
.pub-footer__desc { margin: .875rem 0 0; font-size: .8125rem; line-height: 1.75; color: var(--pub-text-mute); }
.pub-footer__cols { display: flex; gap: 3rem; flex-wrap: wrap; }
.pub-footer__title {
    margin: 0 0 .625rem; font-size: .6875rem; font-weight: 800;
    letter-spacing: .12em; text-transform: uppercase; color: var(--pub-text-faint);
}
.pub-footer__link {
    display: block; padding: .25rem 0; font-size: .8125rem;
    color: var(--pub-text-mute); text-decoration: none;
    transition: color var(--pub-dur) var(--pub-ease);
}
.pub-footer__link:hover { color: var(--pub-accent); }
.pub-footer__bottom {
    border-top: 1px solid var(--pub-border); padding-block: 1.125rem;
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: .5rem .75rem; font-size: .75rem; color: var(--pub-text-faint);
}

/* ─────────────── 19. 无障碍 / 降级 ─────────────── */
.pub-sr {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
    html.pub-html { scroll-behavior: auto; }
    .pub-body *,
    .pub-body *::before,
    .pub-body *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
    }
}

/* 无 backdrop-filter 支持时保证顶栏不透明，避免文字压在内容上 */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
    .pub-nav { background: var(--pub-bg-elev); }
    .kb-stat, .pub-totop { background: var(--pub-bg-elev); }
}

/* ═════════════ 20. 顶栏搜索入口（看起来像输入框，实为按钮） ═════════════ */
.pub-searchbtn {
    display: inline-flex; align-items: center; gap: .5rem; flex: 0 0 auto;
    height: 36px; padding: 0; justify-content: center; width: 36px;
    border: 1px solid transparent; border-radius: var(--pub-r-pill);
    background: transparent; color: var(--pub-text-mute);
    font-family: inherit; font-size: .8125rem; cursor: pointer;
    transition: color var(--pub-dur) var(--pub-ease), background var(--pub-dur) var(--pub-ease),
                border-color var(--pub-dur) var(--pub-ease), box-shadow var(--pub-dur) var(--pub-ease);
}
.pub-searchbtn__text,
.pub-searchbtn__kbd { display: none; }
.pub-searchbtn:hover { color: var(--pub-text); background: var(--pub-bg-subtle); }
@media (min-width: 900px) {
    .pub-searchbtn {
        width: 236px; padding: 0 .375rem 0 .8125rem; justify-content: flex-start;
        border-color: var(--pub-border); background: var(--pub-bg-subtle);
        color: var(--pub-text-faint);
    }
    .pub-searchbtn__text { display: block; flex: 1 1 auto; text-align: left; }
    .pub-searchbtn__kbd { display: flex; align-items: center; gap: .1875rem; }
    .pub-searchbtn:hover {
        color: var(--pub-text-mute); background: var(--pub-bg-elev);
        border-color: var(--pub-brand-300); box-shadow: var(--pub-sh-xs);
    }
}

/* 窄屏顶栏压缩：隐藏分隔线、收紧内边距，保证一行放得下 */
@media (max-width: 639px) {
    .pub-navsep { display: none; }
    .pub-navlink { padding: .4375rem .5rem; }
    .pub-brand { gap: .5rem; }
    .pub-brand__name { font-size: .9375rem; }
    .pub-brand__mark { width: 30px; height: 30px; border-radius: 10px; font-size: 15px; }
    .pub-navlinks { gap: 0; }
    .pub-nav__inner { gap: .5rem; }
}

/* 超窄屏（≤420px）：首页入口由左上角 Logo 承担，隐藏重复的文字链接 */
@media (max-width: 420px) {
    .pub-container { padding-inline: 1rem; }
    .pub-navlink[data-nav="home"] { display: none; }
    .pub-btn--sm { padding: 0 .75rem; }
}

/* ═════════════ 21. 悬浮搜索面板（Spotlight） ═════════════ */
.psx-scrim {
    position: fixed; inset: 0; z-index: 90;
    background: rgba(7, 13, 24, .48);
    -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
    opacity: 0; transition: opacity .22s var(--pub-ease);
}
.psx-scrim.is-open { opacity: 1; }

.psx {
    position: fixed; inset: 0; z-index: 91;
    display: flex; align-items: flex-start; justify-content: center;
    padding: 12vh 1rem 2rem; pointer-events: none;
}
@media (max-width: 639px) { .psx { padding: 4.5rem .75rem 1rem; } }

.psx__panel {
    width: 100%; max-width: 40rem; max-height: 74vh;
    display: flex; flex-direction: column; overflow: hidden;
    pointer-events: auto;
    background: var(--pub-bg-elev);
    border: 1px solid var(--pub-border); border-radius: var(--pub-r-xl);
    box-shadow: var(--pub-sh-lg);
    opacity: 0; transform: translateY(-10px) scale(.985);
    transition: opacity .22s var(--pub-ease-out), transform .22s var(--pub-ease-out);
}
.psx.is-open .psx__panel { opacity: 1; transform: none; }

.psx__head {
    display: flex; align-items: center; gap: .75rem; flex: 0 0 auto;
    padding: .875rem 1rem; border-bottom: 1px solid var(--pub-border);
}
.psx__head > .psx__icon { color: var(--pub-text-faint); display: flex; flex: 0 0 auto; }
.psx__input {
    flex: 1 1 auto; min-width: 0; height: 30px;
    border: 0; background: transparent; outline: none;
    color: var(--pub-text); font-family: inherit; font-size: 1.0625rem;
    -webkit-appearance: none; appearance: none;
}
.psx__input::placeholder { color: var(--pub-text-faint); }
.psx__input::-webkit-search-cancel-button { -webkit-appearance: none; appearance: none; }
/* 命令面板里输入框不画焦点环（面板自身就是焦点提示），改由面板描边体现 */
.psx__input:focus,
.psx__input:focus-visible { outline: none; box-shadow: none; }
.psx__panel:focus-within { border-color: var(--pub-brand-300); }
.dark .psx__panel:focus-within { border-color: rgba(45, 212, 191, .4); }
.psx__spin { width: 16px; height: 16px; flex: 0 0 auto; color: var(--pub-accent); animation: pubSpin .9s linear infinite; }
@keyframes pubSpin { to { transform: rotate(360deg); } }

.psx__body { flex: 1 1 auto; overflow-y: auto; padding: .5rem; scroll-padding: .5rem; }
.psx__group {
    padding: .625rem .75rem .375rem;
    font-size: .625rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
    color: var(--pub-text-faint);
}
.psx__item {
    display: flex; align-items: center; gap: .75rem;
    padding: .5rem .75rem; border-radius: var(--pub-r-md);
    text-decoration: none; cursor: pointer;
    transition: background var(--pub-dur) var(--pub-ease);
}
.psx__item:hover { background: var(--pub-bg-subtle); }
.psx__item.is-active { background: var(--pub-accent-soft); }
.psx__item.is-active .psx__title { color: var(--pub-accent); }
.psx__item.is-active .psx__go { opacity: 1; transform: none; }
.psx__thumb {
    width: 44px; height: 44px; flex: 0 0 auto; overflow: hidden;
    border-radius: var(--pub-r-sm); background: var(--pub-bg-subtle);
    border: 1px solid var(--pub-border);
}
.psx__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.psx__main { flex: 1 1 auto; min-width: 0; }
.psx__title {
    font-size: .9375rem; font-weight: 600; color: var(--pub-text); line-height: 1.45;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.psx__desc {
    margin-top: .125rem; font-size: .75rem; color: var(--pub-text-mute); line-height: 1.5;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.psx__tail { display: flex; align-items: center; gap: .5rem; flex: 0 0 auto; }
.psx__go {
    color: var(--pub-accent); display: flex; opacity: 0;
    transform: translateX(-4px); transition: all .2s var(--pub-ease-out);
}
.psx__item mark {
    background: rgba(20, 184, 166, .22); color: inherit;
    border-radius: 3px; padding: 0 1px; font-weight: 800;
}
.dark .psx__item mark { background: rgba(45, 212, 191, .26); }

.psx__foot {
    flex: 0 0 auto; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
    padding: .625rem 1rem; border-top: 1px solid var(--pub-border);
    background: var(--pub-bg-subtle);
    font-size: .6875rem; color: var(--pub-text-faint);
}
.psx__foot span { display: inline-flex; align-items: center; gap: .3125rem; }
.psx__foot .psx__foot-end { margin-left: auto; }
@media (max-width: 639px) { .psx__foot .psx__hint-nav { display: none; } }

.psx__all {
    display: flex; align-items: center; justify-content: center; gap: .375rem;
    width: 100%; margin-top: .25rem; padding: .625rem;
    border: 0; border-radius: var(--pub-r-md);
    background: var(--pub-accent-soft); color: var(--pub-accent);
    font-family: inherit; font-size: .8125rem; font-weight: 700; cursor: pointer;
    transition: filter var(--pub-dur) var(--pub-ease);
}
.psx__all:hover { filter: brightness(.96); }
.psx__empty { padding: 2.5rem 1rem; text-align: center; }
.psx__empty i { color: var(--pub-text-faint); }
.psx__empty p { margin: .75rem 0 0; font-size: .875rem; font-weight: 600; color: var(--pub-text); }
.psx__empty small { display: block; margin-top: .25rem; font-size: .75rem; color: var(--pub-text-mute); }
.psx__skel { display: flex; align-items: center; gap: .75rem; padding: .5rem .75rem; }

/* ═════════════ 22. 列表页布局微调 ═════════════ */
.kb-hero__actions { margin-top: 1.75rem; display: flex; flex-wrap: wrap; gap: .625rem; }
.kb-statline {
    margin-top: 1.5rem; display: flex; flex-wrap: wrap; align-items: center;
    gap: .5rem .875rem; font-size: .8125rem; color: var(--pub-text-mute);
}
.kb-statline > span { display: inline-flex; align-items: center; gap: .375rem; }
.kb-statline strong { color: var(--pub-text); font-weight: 800; font-variant-numeric: tabular-nums; }
.kb-statline__dot { width: 4px; height: 4px; border-radius: 50%; background: var(--pub-border-strong); }

.kb-listhead {
    display: flex; align-items: center; justify-content: space-between;
    gap: .75rem; flex-wrap: wrap; margin-bottom: .75rem;
}
.kb-listhead__title {
    margin: 0; display: inline-flex; align-items: center; gap: .5rem;
    font-size: 1rem; font-weight: 800; letter-spacing: -.01em; color: var(--pub-text);
}
.kb-listhead__title::before {
    content: ""; width: 3px; height: 16px; border-radius: 2px;
    background: linear-gradient(var(--pub-brand-400), var(--pub-brand-600));
}
.kb-listhead__end { display: inline-flex; align-items: center; gap: .625rem; font-size: .8125rem; color: var(--pub-text-faint); }
.kb-clear {
    display: inline-flex; align-items: center; gap: .3125rem;
    border: 0; background: transparent; padding: .25rem .375rem; border-radius: var(--pub-r-xs);
    color: var(--pub-accent); font-family: inherit; font-size: .8125rem; font-weight: 700; cursor: pointer;
    transition: background var(--pub-dur) var(--pub-ease);
}
.kb-clear:hover { background: var(--pub-accent-soft); }
.kb-catbar { margin-bottom: 1.25rem; }

/* 卡片右下角的前进指示（hover 才出现，避免静态噪点） */
.kb-card__go {
    position: absolute; right: 1.125rem; top: 50%; margin-top: -14px;
    width: 28px; height: 28px; display: none; place-items: center;
    border-radius: 50%; background: var(--pub-accent-soft); color: var(--pub-accent);
    opacity: 0; transform: translateX(-6px); transition: all .3s var(--pub-ease-out);
    pointer-events: none;
}
@media (min-width: 1024px) { .kb-card__go { display: grid; } }
.kb-card:hover .kb-card__go { opacity: 1; transform: none; }
@media (min-width: 1024px) { .kb-card:hover .kb-card__body { padding-right: 2.75rem; } }
.kb-card__body { transition: padding-right .3s var(--pub-ease-out); }

/* ═════════════ 23. 详情页细节 ═════════════ */
.pub-article__meta > span + span::before {
    content: ""; display: inline-block;
    width: 4px; height: 4px; margin-right: .8125rem; border-radius: 50%;
    background: var(--pub-border-strong); vertical-align: middle;
}
.pub-article__body {
    border-top: 0 !important;
    padding-top: 0 !important;
}

/* 正文阅读面：卡片向外溢出 gutter，文字列宽仍严格保持 44rem */
.pub-article__surface {
    margin-top: 1.5rem;
    margin-inline: -1.25rem;
    padding: 1.25rem;
    background: var(--pub-bg-elev);
    border: 1px solid var(--pub-border);
    border-left: 0; border-right: 0; border-radius: 0;
    box-shadow: none;
}
@media (max-width: 420px) {
    .pub-article__surface { margin-inline: -1rem; padding-inline: 1rem; }
}
@media (min-width: 768px) {
    .pub-article__surface {
        margin-top: 1.75rem;
        margin-inline: -2.5rem;
        padding: 2.25rem 2.5rem;
        border: 1px solid var(--pub-border);
        border-radius: var(--pub-r-xl);
        box-shadow: var(--pub-sh-sm);
    }
}
.pub-article__actions { align-items: center; }
.pub-article__actions .pub-article__actions-end { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }

/* 附件 / 继续阅读 区块统一标题节奏 */
.pub-block { margin-top: 3rem; }
.pub-block > .pub-sechead { margin-bottom: .875rem; }