/* ==========================================================================
   NX Design System — 《计算生物学与人工智能》课程平台
   无框架依赖 (不使用 Bootstrap)。所有页面只使用本文件的设计令牌与组件。
   断点: 手机 <640px · 平板 640–1023px · 电脑 ≥1024px
   ========================================================================== */

/* ---------- 字体 (本地托管, 内网可用) ---------- */
@font-face { font-family: "Chakra Petch"; font-weight: 500; font-display: swap; src: url("fonts/chakra-petch-500.woff2") format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 600; font-display: swap; src: url("fonts/chakra-petch-600.woff2") format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 700; font-display: swap; src: url("fonts/chakra-petch-700.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 400; font-display: swap; src: url("fonts/jetbrains-mono-400.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 600; font-display: swap; src: url("fonts/jetbrains-mono-600.woff2") format("woff2"); }

/* ---------- 设计令牌 ---------- */
:root {
    color-scheme: dark;
    /* 表面 */
    --nx-bg: #070b11;
    --nx-bg-2: #0b111a;
    --nx-surface: #0f1722;
    --nx-surface-2: #152030;
    --nx-surface-3: #1c2a3d;
    --nx-glass: rgba(15, 23, 34, .72);
    --nx-line: rgba(126, 231, 214, .14);
    --nx-line-strong: rgba(126, 231, 214, .32);
    /* 文字 */
    --nx-text: #e6eef5;
    --nx-text-2: #a3b3c4;
    --nx-text-3: #6b7d90;
    /* 主强调色 (单一强调: 荧光青) + 语义色 */
    --nx-accent: #35e0c2;
    --nx-accent-2: #1fb59c;
    --nx-accent-ink: #03231d;
    --nx-accent-soft: rgba(53, 224, 194, .12);
    --nx-glow: 0 0 0 1px rgba(53, 224, 194, .35), 0 0 28px -6px rgba(53, 224, 194, .45);
    --nx-ok: #4ade80;
    --nx-ok-soft: rgba(74, 222, 128, .13);
    --nx-warn: #f5b942;
    --nx-warn-soft: rgba(245, 185, 66, .13);
    --nx-danger: #ff6b6b;
    --nx-danger-soft: rgba(255, 107, 107, .13);
    --nx-info: #5cb8ff;
    --nx-info-soft: rgba(92, 184, 255, .13);
    /* 形状 / 阴影 */
    --nx-r-sm: 6px;
    --nx-r: 10px;
    --nx-r-lg: 16px;
    --nx-shadow: 0 18px 40px -18px rgba(0, 8, 16, .8);
    --nx-shadow-lg: 0 30px 70px -24px rgba(0, 8, 16, .9);
    /* 字体 */
    --nx-font-display: "Chakra Petch", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    --nx-font: -apple-system, "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
    --nx-font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    /* 尺寸 */
    --nx-topbar-h: 60px;
    --nx-tabbar-h: 0px;
    --nx-container: 1240px;
    --nx-gutter: clamp(16px, 3vw, 32px);
    --nx-ease: cubic-bezier(.2, .8, .2, 1);
}

:root[data-theme="light"] {
    /* 皮肤「极昼白」: 冷白纸面 + 墨色文字 + 深青强调, 卡片靠细边与柔和投影分层 */
    color-scheme: light;
    --nx-bg: #f3f6fa;
    --nx-bg-2: #eaeff5;
    --nx-surface: #ffffff;
    --nx-surface-2: #f5f8fb;
    --nx-surface-3: #e4ebf2;
    --nx-glass: rgba(255, 255, 255, .78);
    --nx-line: rgba(15, 50, 70, .11);
    --nx-line-strong: rgba(8, 120, 105, .34);
    --nx-text: #0d1b26;
    --nx-text-2: #40546a;
    --nx-text-3: #74869a;
    --nx-accent: #078a76;
    --nx-accent-2: #056f5f;
    --nx-accent-ink: #ffffff;
    --nx-accent-soft: rgba(7, 138, 118, .09);
    --nx-glow: 0 0 0 1px rgba(7, 138, 118, .32), 0 10px 28px -12px rgba(7, 138, 118, .4);
    --nx-ok: #15803d;
    --nx-ok-soft: rgba(21, 128, 61, .1);
    --nx-warn: #b45309;
    --nx-warn-soft: rgba(180, 83, 9, .1);
    --nx-danger: #c53030;
    --nx-danger-soft: rgba(197, 48, 48, .09);
    --nx-info: #1d6fb8;
    --nx-info-soft: rgba(29, 111, 184, .1);
    --nx-shadow: 0 1px 2px rgba(16, 40, 60, .05), 0 12px 32px -18px rgba(16, 40, 60, .22);
    --nx-shadow-lg: 0 2px 4px rgba(16, 40, 60, .05), 0 28px 60px -28px rgba(16, 40, 60, .32);
}

@media (max-width: 1023.98px) {
    :root { --nx-tabbar-h: calc(58px + env(safe-area-inset-bottom, 0px)); --nx-topbar-h: 54px; }
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--nx-topbar-h) + 16px); }
body {
    margin: 0;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    background: var(--nx-bg);
    color: var(--nx-text);
    font: 400 16px/1.7 var(--nx-font);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img, svg, video, canvas { max-width: 100%; }
img { height: auto; }
a { color: var(--nx-accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--nx-text); }
h1, h2, h3, h4, h5, h6 { margin: 0 0 .6em; font-family: var(--nx-font-display); font-weight: 600; line-height: 1.25; letter-spacing: -.01em; text-wrap: balance; }
h1 { font-size: clamp(1.8rem, 1.2rem + 2.4vw, 2.9rem); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.9rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
hr { border: 0; border-top: 1px solid var(--nx-line); margin: 1.5rem 0; }
::selection { background: var(--nx-accent); color: var(--nx-accent-ink); }
:focus-visible { outline: 2px solid var(--nx-accent); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }
code, kbd, pre, samp { font-family: var(--nx-font-mono); font-size: .9em; }
kbd { padding: 1px 6px; border: 1px solid var(--nx-line-strong); border-bottom-width: 2px; border-radius: 5px; background: var(--nx-surface-2); color: var(--nx-text-2); font-size: .75rem; }
* { scrollbar-width: thin; scrollbar-color: var(--nx-surface-3) transparent; }

/* 背景氛围层: 动态粒子画布 + 网格 + 噪点 */
.nx-backdrop { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.nx-backdrop canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; }
.nx-backdrop::before {
    content: ""; position: absolute; inset: -2px;
    background-image:
        linear-gradient(var(--nx-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--nx-line) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 10%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 10%, transparent 75%);
    opacity: .55;
}
.nx-backdrop::after {
    content: ""; position: absolute; inset: 0;
    background:
        radial-gradient(60% 45% at 85% -5%, rgba(53, 224, 194, .13), transparent 70%),
        radial-gradient(45% 40% at 0% 25%, rgba(92, 184, 255, .07), transparent 70%);
}
:root[data-theme="light"] .nx-backdrop canvas { opacity: .4; }
:root[data-theme="light"] .nx-backdrop::after { background: radial-gradient(60% 45% at 85% -5%, rgba(7, 138, 118, .1), transparent 70%), radial-gradient(45% 40% at 0% 20%, rgba(29, 111, 184, .07), transparent 70%); }
:root[data-theme="light"] .nx-hero__title em { text-shadow: none; }
:root[data-theme="light"] .nx-tile { background: linear-gradient(160deg, #fff, var(--nx-surface-2) 70%); box-shadow: var(--nx-shadow); }
:root[data-theme="light"] .nx-card, :root[data-theme="light"] .nx-stat { box-shadow: var(--nx-shadow); }

/* ---------- 布局 ---------- */
.nx-main { flex: 1 0 auto; width: 100%; padding-top: var(--nx-topbar-h); padding-bottom: calc(var(--nx-tabbar-h) + 24px); }
.nx-container { width: 100%; max-width: var(--nx-container); margin-inline: auto; padding-inline: var(--nx-gutter); }
.nx-container--narrow { max-width: 860px; }
.nx-container--wide { max-width: 1560px; }
.nx-section { padding-block: clamp(20px, 3.5vw, 44px); }
.nx-stack { display: flex; flex-direction: column; gap: var(--gap, 16px); }
.nx-cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--gap, 10px); }
.nx-between { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.nx-grid { display: grid; gap: var(--gap, 18px); grid-template-columns: repeat(auto-fill, minmax(min(var(--min, 260px), 100%), 1fr)); }
.nx-cols-2, .nx-cols-3, .nx-cols-4 { display: grid; gap: var(--gap, 18px); grid-template-columns: 1fr; }
/* 主内容 + 侧栏 */
.nx-layout-aside { display: grid; gap: 24px; grid-template-columns: minmax(0, 1fr); align-items: start; }
.nx-sticky, .nx-panel.nx-sticky, .nx-card.nx-sticky { position: sticky; top: calc(var(--nx-topbar-h) + 16px); }
@media (min-width: 640px) {
    .nx-cols-2, .nx-cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .nx-cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
    .nx-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .nx-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .nx-layout-aside { grid-template-columns: minmax(0, 1fr) 320px; }
    .nx-layout-aside--left { grid-template-columns: 280px minmax(0, 1fr); }
}

/* 页面标题区 */
.nx-pagehead { padding-block: clamp(22px, 4vw, 44px) clamp(14px, 2vw, 22px); }
.nx-pagehead h1 { margin-bottom: .25em; font-size: clamp(1.6rem, 1.2rem + 1.8vw, 2.4rem); }
.nx-pagehead p { color: var(--nx-text-2); max-width: 65ch; margin: 0; }
.nx-eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 10px; color: var(--nx-accent); font: 500 .74rem/1 var(--nx-font-mono); letter-spacing: .14em; text-transform: uppercase; }
.nx-eyebrow::before { content: ""; width: 18px; height: 1px; background: currentColor; }
.nx-breadcrumb { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; padding: 0; list-style: none; color: var(--nx-text-3); font-size: .84rem; }
.nx-breadcrumb li + li::before { content: "/"; margin-right: 6px; opacity: .5; }
.nx-breadcrumb a { color: var(--nx-text-2); }
.nx-breadcrumb a:hover { color: var(--nx-accent); }

/* ---------- 顶部导航 ---------- */
.nx-topbar { position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--nx-topbar-h); background: var(--nx-glass); backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4); border-bottom: 1px solid var(--nx-line); transition: transform .35s var(--nx-ease), box-shadow .3s; }
.nx-topbar.is-hidden { transform: translateY(-100%); }
.nx-topbar.is-scrolled { box-shadow: var(--nx-shadow); }
.nx-topbar__inner { height: 100%; display: flex; align-items: center; gap: 8px; }
.nx-brand { display: flex; align-items: center; gap: 10px; margin-right: auto; color: var(--nx-text); font: 600 1rem/1.1 var(--nx-font-display); min-width: 0; }
.nx-brand:hover { color: var(--nx-text); }
.nx-brand__mark { flex: none; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 9px; background: var(--nx-accent-soft); border: 1px solid var(--nx-line-strong); color: var(--nx-accent); }
.nx-brand__mark svg { width: 20px; height: 20px; }
.nx-brand__mark .helix-a { animation: nx-helix 3.2s ease-in-out infinite; transform-origin: center; }
.nx-brand__mark .helix-b { animation: nx-helix 3.2s ease-in-out infinite reverse; transform-origin: center; }
@keyframes nx-helix { 50% { transform: scaleX(-1); } }
.nx-brand__text { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.nx-brand__text small { display: block; margin-top: 3px; color: var(--nx-text-3); font: 400 .62rem/1 var(--nx-font-mono); letter-spacing: .16em; }

.nx-nav { display: none; align-items: center; gap: 2px; height: 100%; }
.nx-nav__item { position: relative; height: 100%; display: flex; align-items: center; }
.nx-nav__link { display: flex; align-items: center; gap: 6px; padding: 8px 12px; border: 0; border-radius: 8px; background: none; color: var(--nx-text-2); font: 500 .92rem/1 var(--nx-font); cursor: pointer; transition: color .2s, background .2s; }
.nx-nav__link:hover, .nx-nav__item:hover > .nx-nav__link, .nx-nav__item:focus-within > .nx-nav__link, .nx-nav__link.is-active { color: var(--nx-text); background: var(--nx-accent-soft); }
.nx-nav__link.is-active { color: var(--nx-accent); }
.nx-nav__link .bi-chevron-down { font-size: .65rem; transition: transform .25s; }
.nx-nav__item:hover .bi-chevron-down, .nx-nav__item:focus-within .bi-chevron-down { transform: rotate(180deg); }
.nx-mega { position: absolute; top: calc(100% - 6px); left: 50%; min-width: 300px; padding: 10px; border: 1px solid var(--nx-line-strong); border-radius: var(--nx-r-lg); background: var(--nx-surface); box-shadow: var(--nx-shadow-lg); opacity: 0; visibility: hidden; transform: translate(-50%, 8px); transition: opacity .2s, transform .25s var(--nx-ease), visibility .2s; }
.nx-mega--right { left: auto; right: 0; transform: translate(0, 8px); }
.nx-nav__item:hover > .nx-mega, .nx-nav__item:focus-within > .nx-mega, .nx-nav__item.is-open > .nx-mega { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.nx-nav__item:hover > .nx-mega--right, .nx-nav__item:focus-within > .nx-mega--right, .nx-nav__item.is-open > .nx-mega--right { transform: translate(0, 0); }
.nx-mega--cols { display: grid; grid-template-columns: repeat(2, minmax(220px, 1fr)); gap: 2px; min-width: 520px; }
.nx-mega__link { display: flex; align-items: flex-start; gap: 12px; padding: 10px 12px; border-radius: var(--nx-r); color: var(--nx-text); transition: background .15s; }
.nx-mega__link:hover { background: var(--nx-accent-soft); color: var(--nx-text); }
.nx-mega__link > i { flex: none; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 8px; background: var(--nx-surface-2); color: var(--nx-accent); font-size: 1rem; }
.nx-mega__link b { display: block; font-weight: 600; font-size: .92rem; line-height: 1.3; }
.nx-mega__link span { display: block; color: var(--nx-text-3); font-size: .78rem; line-height: 1.4; }
.nx-mega__sep { grid-column: 1 / -1; height: 1px; margin: 6px 4px; background: var(--nx-line); }
.nx-mega__label { grid-column: 1 / -1; padding: 6px 12px 2px; color: var(--nx-text-3); font: 500 .68rem/1 var(--nx-font-mono); letter-spacing: .14em; text-transform: uppercase; }

.nx-iconbtn { position: relative; flex: none; width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid transparent; border-radius: 9px; background: none; color: var(--nx-text-2); font-size: 1.05rem; cursor: pointer; transition: .2s; }
.nx-iconbtn:hover { color: var(--nx-accent); background: var(--nx-accent-soft); border-color: var(--nx-line); }
.nx-iconbtn .nx-dot { position: absolute; top: 7px; right: 7px; width: 8px; height: 8px; border-radius: 50%; background: var(--nx-danger); box-shadow: 0 0 0 2px var(--nx-bg); animation: nx-pulse 2s infinite; }
@keyframes nx-pulse { 50% { box-shadow: 0 0 0 2px var(--nx-bg), 0 0 0 6px rgba(255, 107, 107, .25); } }
.nx-searchbtn { display: none; align-items: center; gap: 8px; height: 36px; padding: 0 10px 0 12px; border: 1px solid var(--nx-line); border-radius: 9px; background: var(--nx-surface); color: var(--nx-text-3); font: 400 .84rem/1 var(--nx-font); cursor: pointer; transition: .2s; }
.nx-searchbtn:hover { border-color: var(--nx-line-strong); color: var(--nx-text-2); }
.nx-userchip { display: flex; align-items: center; gap: 8px; padding: 4px 10px 4px 4px; border: 1px solid var(--nx-line); border-radius: 99px; background: var(--nx-surface); color: var(--nx-text); font-size: .86rem; cursor: pointer; }
.nx-userchip span { max-width: 9ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (min-width: 1024px) {
    .nx-nav { display: flex; }
    .nx-searchbtn { display: flex; }
    .nx-topbar .nx-only-compact { display: none; }
}
@media (max-width: 1023.98px) { .nx-topbar .nx-only-wide { display: none; } }
@media (max-width: 420px) { .nx-brand__text small { display: none; } .nx-brand__text { font-size: .92rem; } }

/* 皮肤切换 (菜单里的分段开关): <div class="nx-skin"><button data-theme-set="dark">..</button><button data-theme-set="light">..</button></div> */
.nx-skin { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; border: 1px solid var(--nx-line); border-radius: 12px; background: var(--nx-bg-2); }
.nx-skin button { position: relative; z-index: 1; display: flex; align-items: center; justify-content: center; gap: 7px; min-height: 38px; padding: 0 12px; border: 0; border-radius: 9px; background: none; color: var(--nx-text-2); font: 500 .84rem/1 var(--nx-font); cursor: pointer; white-space: nowrap; transition: color .25s; -webkit-tap-highlight-color: transparent; }
.nx-skin button.is-active { color: var(--nx-accent-ink); font-weight: 600; }
.nx-skin::before { content: ""; position: absolute; top: 4px; bottom: 4px; left: 4px; width: calc(50% - 6px); border-radius: 9px; background: var(--nx-accent); box-shadow: 0 0 18px -6px var(--nx-accent); transition: transform .35s var(--nx-ease); }
:root[data-theme="light"] .nx-skin::before { transform: translateX(calc(100% + 4px)); }
.nx-skin__label { display: flex; align-items: center; gap: 8px; padding: 8px 12px 6px; color: var(--nx-text-3); font: 500 .68rem/1 var(--nx-font-mono); letter-spacing: .14em; }
/* 切换皮肤时整页柔和过渡 (nx.js 临时加上) */
html.nx-theme-anim, html.nx-theme-anim *, html.nx-theme-anim *::before, html.nx-theme-anim *::after { transition: background-color .45s ease, border-color .45s ease, color .45s ease, box-shadow .45s ease !important; }

/* ---------- 手机/平板 底部标签栏 + 抽屉面板 ---------- */
.nx-tabbar { position: fixed; inset: auto 0 0 0; z-index: 100; display: grid; grid-template-columns: repeat(5, 1fr); height: var(--nx-tabbar-h); padding-bottom: env(safe-area-inset-bottom, 0px); background: var(--nx-glass); backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4); border-top: 1px solid var(--nx-line); }
.nx-tabbar__item { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; border: 0; background: none; color: var(--nx-text-3); font: 500 .66rem/1 var(--nx-font); cursor: pointer; position: relative; -webkit-tap-highlight-color: transparent; }
.nx-tabbar__item i { font-size: 1.25rem; transition: transform .25s var(--nx-ease); }
.nx-tabbar__item.is-active { color: var(--nx-accent); }
.nx-tabbar__item.is-active i { transform: translateY(-2px); }
.nx-tabbar__item.is-active::before { content: ""; position: absolute; top: 0; width: 26px; height: 2px; border-radius: 2px; background: var(--nx-accent); box-shadow: 0 0 12px var(--nx-accent); }
@media (min-width: 1024px) { .nx-tabbar { display: none; } }
@media (min-width: 640px) and (max-width: 1023.98px) { .nx-tabbar { left: 50%; right: auto; bottom: 12px; width: min(560px, 92vw); transform: translateX(-50%); border: 1px solid var(--nx-line-strong); border-radius: 18px; box-shadow: var(--nx-shadow-lg); padding-bottom: 0; height: 58px; } }

.nx-sheet { position: fixed; inset: 0; z-index: 200; visibility: hidden; }
.nx-sheet.is-open { visibility: visible; }
.nx-sheet__scrim { position: absolute; inset: 0; background: rgba(2, 6, 12, .6); backdrop-filter: blur(3px); opacity: 0; transition: opacity .3s; }
.nx-sheet.is-open .nx-sheet__scrim { opacity: 1; }
.nx-sheet__panel { position: absolute; inset: auto 0 0 0; max-height: 82dvh; overflow-y: auto; padding: 10px 16px calc(24px + env(safe-area-inset-bottom, 0px)); border: 1px solid var(--nx-line-strong); border-bottom: 0; border-radius: 22px 22px 0 0; background: var(--nx-surface); transform: translateY(102%); transition: transform .4s var(--nx-ease); overscroll-behavior: contain; }
.nx-sheet.is-open .nx-sheet__panel { transform: none; }
.nx-sheet__grab { width: 40px; height: 4px; margin: 2px auto 14px; border-radius: 4px; background: var(--nx-surface-3); }
.nx-sheet__title { margin: 0 4px 10px; font: 600 1.05rem var(--nx-font-display); }
.nx-sheet__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.nx-sheet__grid .nx-mega__link { border: 1px solid var(--nx-line); background: var(--nx-surface-2); flex-direction: column; gap: 8px; min-height: 96px; }
@media (min-width: 640px) { .nx-sheet__panel { left: 50%; right: auto; width: min(640px, 94vw); bottom: 84px; transform: translate(-50%, 30px); opacity: 0; border-radius: 22px; border-bottom: 1px solid var(--nx-line-strong); transition: transform .3s var(--nx-ease), opacity .25s; } .nx-sheet.is-open .nx-sheet__panel { transform: translate(-50%, 0); opacity: 1; } }

/* ---------- 命令面板 (Ctrl/⌘ + K) ---------- */
.nx-palette { position: fixed; inset: 0; z-index: 300; display: none; align-items: flex-start; justify-content: center; padding: 12vh 16px 0; background: rgba(2, 6, 12, .62); backdrop-filter: blur(4px); }
.nx-palette.is-open { display: flex; animation: nx-fade .18s; }
.nx-palette__box { width: min(620px, 100%); max-height: 70dvh; display: flex; flex-direction: column; border: 1px solid var(--nx-line-strong); border-radius: var(--nx-r-lg); background: var(--nx-surface); box-shadow: var(--nx-shadow-lg), var(--nx-glow); overflow: hidden; animation: nx-pop .25s var(--nx-ease); }
.nx-palette__input { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--nx-line); color: var(--nx-accent); }
.nx-palette__input input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; color: var(--nx-text); font: 400 1.02rem var(--nx-font); }
.nx-palette__list { overflow-y: auto; padding: 8px; }
.nx-palette__group { padding: 8px 12px 4px; color: var(--nx-text-3); font: 500 .68rem/1 var(--nx-font-mono); letter-spacing: .14em; }
.nx-palette__opt { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: var(--nx-r); color: var(--nx-text); cursor: pointer; }
.nx-palette__opt i { color: var(--nx-accent); }
.nx-palette__opt small { margin-left: auto; color: var(--nx-text-3); font-size: .76rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 50%; }
.nx-palette__opt.is-sel { background: var(--nx-accent-soft); box-shadow: inset 2px 0 0 var(--nx-accent); }
.nx-palette__empty { padding: 28px; text-align: center; color: var(--nx-text-3); }
@keyframes nx-fade { from { opacity: 0; } }
@keyframes nx-pop { from { opacity: 0; transform: translateY(-10px) scale(.98); } }

/* ---------- 面板 / 卡片 ---------- */
.nx-panel { position: relative; padding: clamp(16px, 2.4vw, 26px); border: 1px solid var(--nx-line); border-radius: var(--nx-r-lg); background: var(--nx-surface); box-shadow: var(--nx-shadow); }
.nx-panel--glass { background: var(--nx-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.nx-panel--flush { padding: 0; overflow: hidden; }
.nx-panel__head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 16px; }
.nx-panel__head h2, .nx-panel__head h3 { margin: 0; font-size: 1.08rem; display: flex; align-items: center; gap: 8px; }
.nx-panel__head h2 i, .nx-panel__head h3 i { color: var(--nx-accent); }
/* HUD 角标装饰 */
.nx-hud::before, .nx-hud::after { content: ""; position: absolute; width: 14px; height: 14px; border: 2px solid var(--nx-accent); opacity: .7; pointer-events: none; transition: .3s var(--nx-ease); }
.nx-hud::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; border-top-left-radius: var(--nx-r-lg); }
.nx-hud::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; border-bottom-right-radius: var(--nx-r-lg); }
.nx-hud:hover::before, .nx-hud:hover::after { width: 26px; height: 26px; opacity: 1; }

.nx-card { position: relative; display: flex; flex-direction: column; border: 1px solid var(--nx-line); border-radius: var(--nx-r-lg); background: var(--nx-surface); color: var(--nx-text); overflow: hidden; transition: transform .35s var(--nx-ease), border-color .25s, box-shadow .35s; isolation: isolate; }
a.nx-card:hover, .nx-card--hover:hover { transform: translateY(-4px); border-color: var(--nx-line-strong); box-shadow: var(--nx-shadow-lg); color: var(--nx-text); }
/* 光标追光 (由 nx.js 写入 --mx/--my) */
.nx-spot::after { content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity .3s; background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 50%), var(--nx-accent-soft), transparent 65%); pointer-events: none; }
.nx-spot:hover::after { opacity: 1; }
.nx-card__media { position: relative; aspect-ratio: 16 / 9; background: var(--nx-surface-2); overflow: hidden; }
.nx-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--nx-ease); }
.nx-card:hover .nx-card__media img { transform: scale(1.05); }
.nx-card__body { flex: 1; display: flex; flex-direction: column; gap: 8px; padding: 16px 18px 18px; }
.nx-card__title { margin: 0; font: 600 1.02rem/1.4 var(--nx-font-display); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.nx-card__text { margin: 0; color: var(--nx-text-2); font-size: .88rem; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.nx-card__meta { margin-top: auto; padding-top: 6px; display: flex; flex-wrap: wrap; gap: 12px; color: var(--nx-text-3); font-size: .78rem; font-variant-numeric: tabular-nums; }
.nx-card__meta i { margin-right: 3px; }

/* 功能模块磁贴 (首页) */
.nx-tile { position: relative; display: flex; flex-direction: column; gap: 10px; min-height: 148px; padding: 18px; border: 1px solid var(--nx-line); border-radius: var(--nx-r-lg); background: linear-gradient(160deg, var(--nx-surface-2), var(--nx-surface) 60%); color: var(--nx-text); overflow: hidden; isolation: isolate; transition: transform .35s var(--nx-ease), border-color .25s, box-shadow .35s; }
.nx-tile:hover { transform: translateY(-4px); border-color: var(--nx-line-strong); box-shadow: var(--nx-shadow-lg); color: var(--nx-text); }
.nx-tile__icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 11px; border: 1px solid var(--nx-line-strong); background: var(--nx-accent-soft); color: var(--nx-accent); font-size: 1.2rem; transition: .35s var(--nx-ease); }
.nx-tile__icon img { width: 26px; height: 26px; border-radius: 6px; object-fit: cover; }
.nx-tile:hover .nx-tile__icon { background: var(--nx-accent); color: var(--nx-accent-ink); box-shadow: 0 0 22px -2px var(--nx-accent); transform: rotate(-6deg) scale(1.06); }
.nx-tile b { font: 600 1rem/1.3 var(--nx-font-display); }
.nx-tile p { margin: 0; color: var(--nx-text-3); font-size: .82rem; line-height: 1.5; }
.nx-tile__go { position: absolute; top: 16px; right: 16px; color: var(--nx-text-3); transition: .3s var(--nx-ease); }
.nx-tile:hover .nx-tile__go { color: var(--nx-accent); transform: translate(3px, -3px); }
.nx-tile__tag { position: absolute; bottom: 14px; right: 14px; }
.nx-tile--wide { grid-column: span 2; }
@media (max-width: 639.98px) { .nx-tile { min-height: 124px; padding: 14px; } .nx-tile--wide { grid-column: span 2; } .nx-tile p { display: none; } }

/* 磁贴/统计网格: 手机 2 列 */
.nx-tiles { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.nx-stats { display: grid; gap: 12px; grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 639.98px) { .nx-tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; } .nx-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; } }

/* 统计数字 */
.nx-stat { padding: 16px 18px; border: 1px solid var(--nx-line); border-radius: var(--nx-r); background: var(--nx-surface); }
.nx-stat__num { display: block; color: var(--nx-text); font: 700 clamp(1.5rem, 1.1rem + 1.4vw, 2.1rem)/1.1 var(--nx-font-display); font-variant-numeric: tabular-nums; }
.nx-stat__num em { font-style: normal; color: var(--nx-accent); }
.nx-stat__label { color: var(--nx-text-3); font-size: .78rem; letter-spacing: .04em; }

/* ---------- 按钮 ---------- */
.nx-btn { --_bg: var(--nx-surface-2); --_fg: var(--nx-text); --_bd: var(--nx-line-strong); position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; padding: 0 18px; border: 1px solid var(--_bd); border-radius: var(--nx-r); background: var(--_bg); color: var(--_fg); font: 500 .94rem/1 var(--nx-font); white-space: nowrap; cursor: pointer; user-select: none; overflow: hidden; transition: transform .2s var(--nx-ease), box-shadow .25s, background .2s, border-color .2s, color .2s; -webkit-tap-highlight-color: transparent; }
.nx-btn:hover { color: var(--_fg); border-color: var(--nx-accent); transform: translateY(-1px); }
.nx-btn:active { transform: translateY(0) scale(.98); }
.nx-btn--primary { --_bg: var(--nx-accent); --_fg: var(--nx-accent-ink); --_bd: var(--nx-accent); font-weight: 600; }
.nx-btn--primary:hover { box-shadow: 0 0 26px -4px var(--nx-accent); }
.nx-btn--primary::after { content: ""; position: absolute; inset: 0; background: linear-gradient(105deg, transparent 35%, rgba(255, 255, 255, .45) 50%, transparent 65%); transform: translateX(-120%); }
.nx-btn--primary:hover::after { transform: translateX(120%); transition: transform .7s; }
.nx-btn--ghost { --_bg: transparent; --_bd: var(--nx-line); --_fg: var(--nx-text-2); }
.nx-btn--ghost:hover { --_fg: var(--nx-accent); background: var(--nx-accent-soft); }
.nx-btn--outline { --_bg: transparent; --_bd: var(--nx-accent); --_fg: var(--nx-accent); }
.nx-btn--outline:hover { background: var(--nx-accent-soft); }
.nx-btn--danger { --_bg: var(--nx-danger-soft); --_bd: rgba(255, 107, 107, .4); --_fg: var(--nx-danger); }
.nx-btn--danger:hover { border-color: var(--nx-danger); background: var(--nx-danger); color: #fff; }
.nx-btn--warn { --_bg: var(--nx-warn-soft); --_bd: rgba(245, 185, 66, .4); --_fg: var(--nx-warn); }
.nx-btn--sm { min-height: 32px; padding: 0 12px; font-size: .82rem; border-radius: 8px; }
.nx-btn--lg { min-height: 50px; padding: 0 26px; font-size: 1.02rem; }
.nx-btn--block { display: flex; width: 100%; }
.nx-btn[disabled], .nx-btn.is-disabled { opacity: .5; pointer-events: none; }
.nx-btn.is-loading { pointer-events: none; color: transparent; }
.nx-btn.is-loading::before { content: ""; position: absolute; width: 18px; height: 18px; border: 2px solid var(--nx-accent-ink); border-right-color: transparent; border-radius: 50%; animation: nx-spin .7s linear infinite; }
.nx-btn:not(.nx-btn--primary).is-loading::before { border-color: var(--nx-accent); border-right-color: transparent; }
@keyframes nx-spin { to { transform: rotate(360deg); } }
@media (max-width: 639.98px) { .nx-btn { min-height: 44px; } .nx-btn--sm { min-height: 36px; } }

/* ---------- 标签 / 徽章 ---------- */
.nx-badge { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border: 1px solid var(--nx-line-strong); border-radius: 99px; background: var(--nx-accent-soft); color: var(--nx-accent); font: 500 .72rem/1.4 var(--nx-font); white-space: nowrap; }
.nx-badge--ok { background: var(--nx-ok-soft); color: var(--nx-ok); border-color: rgba(74, 222, 128, .35); }
.nx-badge--warn { background: var(--nx-warn-soft); color: var(--nx-warn); border-color: rgba(245, 185, 66, .35); }
.nx-badge--danger { background: var(--nx-danger-soft); color: var(--nx-danger); border-color: rgba(255, 107, 107, .35); }
.nx-badge--info { background: var(--nx-info-soft); color: var(--nx-info); border-color: rgba(92, 184, 255, .35); }
.nx-badge--mute { background: var(--nx-surface-2); color: var(--nx-text-3); border-color: var(--nx-line); }
.nx-badge--live::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; animation: nx-blink 1.4s infinite; }
@keyframes nx-blink { 50% { opacity: .25; } }
.nx-chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border: 1px solid var(--nx-line); border-radius: 99px; background: var(--nx-surface); color: var(--nx-text-2); font-size: .85rem; cursor: pointer; transition: .2s; white-space: nowrap; }
.nx-chip:hover { border-color: var(--nx-line-strong); color: var(--nx-text); }
.nx-chip.is-active { background: var(--nx-accent); border-color: var(--nx-accent); color: var(--nx-accent-ink); font-weight: 600; }
/* 横向滚动条 (筛选标签/栏目, 手机端不换行) */
.nx-scroller { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; -webkit-overflow-scrolling: touch; scroll-snap-type: x proximity; }
.nx-scroller::-webkit-scrollbar { display: none; }
.nx-scroller > * { flex: none; scroll-snap-align: start; }
@media (min-width: 1024px) { .nx-scroller--wrap { flex-wrap: wrap; overflow: visible; } }

/* ---------- 表单 ---------- */
.nx-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.nx-label, .nx-form label { color: var(--nx-text-2); font-size: .86rem; font-weight: 500; }
.nx-label .req, .nx-form label .req { color: var(--nx-danger); margin-left: 2px; }
.nx-input, .nx-select, .nx-textarea,
.nx-form input[type="text"], .nx-form input[type="password"], .nx-form input[type="email"], .nx-form input[type="number"], .nx-form input[type="url"], .nx-form input[type="tel"], .nx-form input[type="search"], .nx-form input[type="date"], .nx-form input[type="datetime-local"], .nx-form input:not([type]), .nx-form select, .nx-form textarea {
    width: 100%; min-height: 44px; padding: 10px 14px; border: 1px solid var(--nx-line-strong); border-radius: var(--nx-r); background: var(--nx-bg-2); color: var(--nx-text); font: 400 1rem/1.5 var(--nx-font); transition: border-color .2s, box-shadow .2s, background .2s; appearance: none; -webkit-appearance: none;
}
.nx-textarea, .nx-form textarea { min-height: 120px; resize: vertical; }
.nx-input::placeholder, .nx-textarea::placeholder, .nx-form input::placeholder, .nx-form textarea::placeholder { color: var(--nx-text-3); }
.nx-input:focus, .nx-select:focus, .nx-textarea:focus, .nx-form input:focus, .nx-form select:focus, .nx-form textarea:focus { outline: 0; border-color: var(--nx-accent); box-shadow: 0 0 0 3px var(--nx-accent-soft), 0 0 18px -6px var(--nx-accent); background: var(--nx-surface); }
.nx-select, .nx-form select { padding-right: 38px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%2335e0c2' stroke-width='2'%3E%3Cpath d='m1 1.5 5 5 5-5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; }
.nx-form select[multiple] { background-image: none; min-height: 120px; }
.nx-form input[type="file"], .nx-file { width: 100%; padding: 10px; border: 1px dashed var(--nx-line-strong); border-radius: var(--nx-r); background: var(--nx-bg-2); color: var(--nx-text-2); font-size: .88rem; }
.nx-form input[type="file"]::file-selector-button, .nx-file::file-selector-button { margin-right: 12px; padding: 7px 14px; border: 1px solid var(--nx-line-strong); border-radius: 8px; background: var(--nx-surface-2); color: var(--nx-accent); cursor: pointer; }
.nx-form input[type="checkbox"], .nx-form input[type="radio"], .nx-check { appearance: none; -webkit-appearance: none; flex: none; width: 20px; height: 20px; margin: 0 8px 0 0; vertical-align: -4px; border: 1.5px solid var(--nx-line-strong); border-radius: 5px; background: var(--nx-bg-2); cursor: pointer; transition: .15s; display: inline-grid; place-content: center; }
.nx-form input[type="radio"], .nx-check[type="radio"] { border-radius: 50%; }
.nx-form input[type="checkbox"]::before, .nx-check[type="checkbox"]::before { content: ""; width: 10px; height: 10px; transform: scale(0); transition: transform .15s var(--nx-ease); background: var(--nx-accent-ink); clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%); }
.nx-form input[type="radio"]::before, .nx-check[type="radio"]::before { content: ""; width: 8px; height: 8px; border-radius: 50%; transform: scale(0); transition: transform .15s var(--nx-ease); background: var(--nx-accent-ink); }
.nx-form input[type="checkbox"]:checked, .nx-form input[type="radio"]:checked, .nx-check:checked { background: var(--nx-accent); border-color: var(--nx-accent); box-shadow: 0 0 12px -2px var(--nx-accent); }
.nx-form input:checked::before, .nx-check:checked::before { transform: scale(1); }
.nx-help, .nx-form .helptext { color: var(--nx-text-3); font-size: .8rem; }
.nx-error, .nx-form .errorlist { margin: 0; padding: 0; list-style: none; color: var(--nx-danger); font-size: .82rem; }
.nx-input-group { display: flex; }
.nx-input-group > .nx-input { border-radius: var(--nx-r) 0 0 var(--nx-r); }
.nx-input-group > .nx-btn { border-radius: 0 var(--nx-r) var(--nx-r) 0; min-height: 44px; }
.nx-searchbox { position: relative; }
.nx-searchbox > i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--nx-text-3); pointer-events: none; }
.nx-searchbox > .nx-input { padding-left: 40px; }
/* 选项卡式单选 (答题选项等) */
.nx-option { display: flex; align-items: flex-start; gap: 12px; padding: 12px 14px; border: 1px solid var(--nx-line); border-radius: var(--nx-r); background: var(--nx-bg-2); cursor: pointer; transition: .2s; }
.nx-option:hover { border-color: var(--nx-line-strong); }
.nx-option:has(input:checked) { border-color: var(--nx-accent); background: var(--nx-accent-soft); box-shadow: var(--nx-glow); }

/* ---------- 表格 ---------- */
.nx-table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--nx-line); border-radius: var(--nx-r-lg); background: var(--nx-surface); -webkit-overflow-scrolling: touch; }
.nx-table { width: 100%; border-collapse: collapse; font-size: .9rem; font-variant-numeric: tabular-nums; }
.nx-table th { position: sticky; top: 0; padding: 12px 14px; background: var(--nx-surface-2); color: var(--nx-text-3); font: 500 .74rem/1.3 var(--nx-font); letter-spacing: .06em; text-align: left; white-space: nowrap; border-bottom: 1px solid var(--nx-line-strong); }
.nx-table td { padding: 12px 14px; border-bottom: 1px solid var(--nx-line); vertical-align: middle; }
.nx-table tbody tr { transition: background .15s; }
.nx-table tbody tr:hover { background: var(--nx-accent-soft); }
.nx-table tbody tr:last-child td { border-bottom: 0; }
/* 手机端: 表格行折叠为卡片 (给 td 加 data-label) */
@media (max-width: 639.98px) {
    .nx-table--stack thead { display: none; }
    .nx-table--stack, .nx-table--stack tbody, .nx-table--stack tr, .nx-table--stack td { display: block; width: 100%; }
    .nx-table--stack tr { padding: 10px 14px; border-bottom: 1px solid var(--nx-line-strong); }
    .nx-table--stack td { display: flex; justify-content: space-between; gap: 16px; padding: 5px 0; border: 0; text-align: right; }
    .nx-table--stack td::before { content: attr(data-label); flex: none; color: var(--nx-text-3); font-size: .78rem; text-align: left; }
    .nx-table--stack td:not([data-label])::before { display: none; }
}

/* ---------- 提示 / 消息 ---------- */
.nx-alert { display: flex; gap: 12px; padding: 13px 16px; margin-bottom: 16px; border: 1px solid var(--nx-line-strong); border-left-width: 3px; border-radius: var(--nx-r); background: var(--nx-accent-soft); color: var(--nx-text); font-size: .92rem; }
.nx-alert > i { color: var(--nx-accent); font-size: 1.1rem; line-height: 1.5; }
.nx-alert--ok { background: var(--nx-ok-soft); border-color: var(--nx-ok); } .nx-alert--ok > i { color: var(--nx-ok); }
.nx-alert--warn { background: var(--nx-warn-soft); border-color: var(--nx-warn); } .nx-alert--warn > i { color: var(--nx-warn); }
.nx-alert--danger { background: var(--nx-danger-soft); border-color: var(--nx-danger); } .nx-alert--danger > i { color: var(--nx-danger); }
.nx-alert--info { background: var(--nx-info-soft); border-color: var(--nx-info); } .nx-alert--info > i { color: var(--nx-info); }

.nx-toasts { position: fixed; z-index: 400; top: calc(var(--nx-topbar-h) + 12px); right: 16px; display: flex; flex-direction: column; gap: 10px; width: min(360px, calc(100vw - 32px)); pointer-events: none; }
.nx-toast { display: flex; align-items: flex-start; gap: 10px; padding: 12px 14px; border: 1px solid var(--nx-line-strong); border-radius: var(--nx-r); background: var(--nx-surface); box-shadow: var(--nx-shadow-lg); font-size: .9rem; pointer-events: auto; animation: nx-toast-in .4s var(--nx-ease); position: relative; overflow: hidden; }
.nx-toast::after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%; background: var(--c, var(--nx-accent)); transform-origin: left; animation: nx-toast-bar var(--life, 4s) linear forwards; }
.nx-toast > i { color: var(--c, var(--nx-accent)); font-size: 1.1rem; }
.nx-toast--ok { --c: var(--nx-ok); } .nx-toast--warn { --c: var(--nx-warn); } .nx-toast--danger { --c: var(--nx-danger); } .nx-toast--info { --c: var(--nx-info); }
.nx-toast.is-leaving { animation: nx-toast-out .3s forwards; }
@keyframes nx-toast-in { from { opacity: 0; transform: translateX(30px); } }
@keyframes nx-toast-out { to { opacity: 0; transform: translateX(30px); } }
@keyframes nx-toast-bar { to { transform: scaleX(0); } }

/* ---------- 弹窗 ---------- */
.nx-modal { position: fixed; inset: 0; z-index: 350; display: none; align-items: center; justify-content: center; padding: 16px; background: rgba(2, 6, 12, .65); backdrop-filter: blur(4px); }
.nx-modal.is-open { display: flex; animation: nx-fade .2s; }
.nx-modal__box { width: min(var(--w, 520px), 100%); max-height: 88dvh; display: flex; flex-direction: column; border: 1px solid var(--nx-line-strong); border-radius: var(--nx-r-lg); background: var(--nx-surface); box-shadow: var(--nx-shadow-lg); animation: nx-pop .3s var(--nx-ease); }
.nx-modal__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--nx-line); }
.nx-modal__head h3 { margin: 0; font-size: 1.08rem; }
.nx-modal__body { padding: 20px; overflow-y: auto; color: var(--nx-text-2); }
.nx-modal__foot { display: flex; justify-content: flex-end; gap: 10px; padding: 14px 20px; border-top: 1px solid var(--nx-line); }
@media (max-width: 639.98px) { .nx-modal { align-items: flex-end; padding: 0; } .nx-modal__box { width: 100%; border-radius: 20px 20px 0 0; animation-name: nx-sheet-up; } .nx-modal__foot .nx-btn { flex: 1; } }
@keyframes nx-sheet-up { from { transform: translateY(100%); } }

/* ---------- 选项卡 ---------- */
.nx-tabs { display: flex; gap: 4px; overflow-x: auto; margin-bottom: 18px; padding: 4px; border: 1px solid var(--nx-line); border-radius: 12px; background: var(--nx-surface); scrollbar-width: none; }
.nx-tabs::-webkit-scrollbar { display: none; }
.nx-tab { flex: none; padding: 9px 16px; border: 0; border-radius: 9px; background: none; color: var(--nx-text-2); font: 500 .9rem/1 var(--nx-font); cursor: pointer; white-space: nowrap; transition: .2s; }
.nx-tab:hover { color: var(--nx-text); }
.nx-tab.is-active { background: var(--nx-accent); color: var(--nx-accent-ink); font-weight: 600; box-shadow: 0 0 18px -6px var(--nx-accent); }
.nx-tabpane { display: none; }
.nx-tabpane.is-active { display: block; animation: nx-rise .4s var(--nx-ease); }
@keyframes nx-rise { from { opacity: 0; transform: translateY(10px); } }

/* 折叠 */
.nx-collapse { border: 1px solid var(--nx-line); border-radius: var(--nx-r); background: var(--nx-surface); margin-bottom: 10px; }
.nx-collapse > summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; cursor: pointer; font-weight: 500; list-style: none; }
.nx-collapse > summary::-webkit-details-marker { display: none; }
.nx-collapse > summary::after { content: "\F282"; font-family: "bootstrap-icons"; color: var(--nx-accent); transition: transform .25s; }
.nx-collapse[open] > summary::after { transform: rotate(180deg); }
.nx-collapse__body { padding: 0 16px 16px; color: var(--nx-text-2); }

/* ---------- 分页 ---------- */
.nx-pagination { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 6px; margin: 28px 0 8px; padding: 0; list-style: none; font-variant-numeric: tabular-nums; }
.nx-pagination a, .nx-pagination span { min-width: 40px; height: 40px; padding: 0 12px; display: grid; place-items: center; border: 1px solid var(--nx-line); border-radius: var(--nx-r); background: var(--nx-surface); color: var(--nx-text-2); font-size: .88rem; }
.nx-pagination a:hover { border-color: var(--nx-accent); color: var(--nx-accent); }
.nx-pagination .is-current { background: var(--nx-accent); border-color: var(--nx-accent); color: var(--nx-accent-ink); font-weight: 600; }
.nx-pagination .is-gap { border: 0; background: none; min-width: 20px; padding: 0; }

/* ---------- 头像 / 进度 / 其他 ---------- */
.nx-avatar { flex: none; width: var(--s, 36px); height: var(--s, 36px); display: inline-grid; place-items: center; border-radius: 50%; border: 1px solid var(--nx-line-strong); background: var(--nx-accent-soft); color: var(--nx-accent); font: 600 calc(var(--s, 36px) * .42)/1 var(--nx-font-display); object-fit: cover; overflow: hidden; text-transform: uppercase; }
img.nx-avatar { display: inline-block; }
.nx-progress { height: 8px; border-radius: 8px; background: var(--nx-surface-3); overflow: hidden; }
.nx-progress__bar { height: 100%; width: var(--v, 0%); border-radius: inherit; background: linear-gradient(90deg, var(--nx-accent-2), var(--nx-accent)); box-shadow: 0 0 14px var(--nx-accent); transition: width .6s var(--nx-ease); position: relative; overflow: hidden; }
.nx-progress__bar::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .5), transparent); animation: nx-sweep 1.6s linear infinite; }
@keyframes nx-sweep { from { transform: translateX(-100%); } to { transform: translateX(100%); } }
.nx-ring { --v: 0; --s: 120px; width: var(--s); height: var(--s); border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--nx-accent) calc(var(--v) * 1%), var(--nx-surface-3) 0); position: relative; font: 700 calc(var(--s) * .24)/1 var(--nx-font-display); font-variant-numeric: tabular-nums; }
.nx-ring::before { content: ""; position: absolute; inset: 9px; border-radius: 50%; background: var(--nx-surface); }
.nx-ring > * { position: relative; }
.nx-spinner { width: 28px; height: 28px; border: 3px solid var(--nx-surface-3); border-top-color: var(--nx-accent); border-radius: 50%; animation: nx-spin .8s linear infinite; }
.nx-empty { padding: 48px 20px; text-align: center; color: var(--nx-text-3); }
.nx-empty > i { display: block; margin-bottom: 12px; font-size: 2.6rem; color: var(--nx-surface-3); }
.nx-skeleton { border-radius: var(--nx-r); background: linear-gradient(90deg, var(--nx-surface-2) 25%, var(--nx-surface-3) 50%, var(--nx-surface-2) 75%); background-size: 200% 100%; animation: nx-skel 1.4s infinite; }
@keyframes nx-skel { to { background-position: -200% 0; } }
.nx-divider { display: flex; align-items: center; gap: 12px; margin: 22px 0; color: var(--nx-text-3); font-size: .8rem; }
.nx-divider::before, .nx-divider::after { content: ""; flex: 1; height: 1px; background: var(--nx-line); }
.nx-list { margin: 0; padding: 0; list-style: none; }
.nx-list > li, .nx-list > a { display: flex; align-items: center; gap: 12px; padding: 12px 4px; border-bottom: 1px solid var(--nx-line); color: var(--nx-text); }
.nx-list > :last-child { border-bottom: 0; }
.nx-list > a:hover { color: var(--nx-accent); padding-left: 10px; transition: .25s var(--nx-ease); }
.nx-terminal { padding: 16px 18px; border: 1px solid var(--nx-line-strong); border-radius: var(--nx-r); background: #05080d; color: #b8f5e9; font: 400 .86rem/1.7 var(--nx-font-mono); overflow-x: auto; white-space: pre-wrap; word-break: break-word; }
.nx-fab { position: fixed; z-index: 90; right: 18px; bottom: calc(var(--nx-tabbar-h) + 18px); width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid var(--nx-line-strong); border-radius: 50%; background: var(--nx-surface); color: var(--nx-accent); font-size: 1.1rem; box-shadow: var(--nx-shadow-lg); cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(12px); transition: .3s var(--nx-ease); }
.nx-fab.is-show { opacity: 1; visibility: visible; transform: none; }
.nx-fab:hover { background: var(--nx-accent); color: var(--nx-accent-ink); box-shadow: 0 0 26px -4px var(--nx-accent); }
@media (min-width: 640px) and (max-width: 1023.98px) { .nx-fab { bottom: 90px; } }
/* 顶部页面加载进度条 */
.nx-loadbar { position: fixed; top: 0; left: 0; z-index: 500; height: 2px; width: 0; background: var(--nx-accent); box-shadow: 0 0 12px var(--nx-accent); transition: width .4s var(--nx-ease), opacity .3s; pointer-events: none; }

/* ---------- 富文本 (文章 / CKEditor / Markdown 输出) ---------- */
.nx-prose { color: var(--nx-text); font-size: 1.02rem; line-height: 1.9; overflow-wrap: anywhere; }
.nx-prose > * { max-width: 100%; }
.nx-prose h1, .nx-prose h2, .nx-prose h3, .nx-prose h4 { margin: 1.8em 0 .7em; scroll-margin-top: calc(var(--nx-topbar-h) + 16px); }
.nx-prose h2 { padding-left: 12px; border-left: 3px solid var(--nx-accent); }
.nx-prose img { display: block; margin: 1.2em auto; border-radius: var(--nx-r); border: 1px solid var(--nx-line); height: auto !important; }
.nx-prose a { text-decoration: underline; text-decoration-color: var(--nx-line-strong); text-underline-offset: 3px; }
.nx-prose blockquote { margin: 1.2em 0; padding: 10px 18px; border-left: 3px solid var(--nx-accent); background: var(--nx-accent-soft); border-radius: 0 var(--nx-r) var(--nx-r) 0; color: var(--nx-text-2); }
.nx-prose ul, .nx-prose ol { padding-left: 1.5em; }
.nx-prose li { margin: .3em 0; }
.nx-prose :not(pre) > code { padding: 2px 6px; border-radius: 5px; background: var(--nx-surface-3); color: var(--nx-accent); }
.nx-prose pre { margin: 1.2em 0; padding: 16px 18px; border: 1px solid var(--nx-line); border-radius: var(--nx-r); background: #05080d !important; color: #d6e6f0; overflow-x: auto; line-height: 1.6; font-size: .86rem; -webkit-overflow-scrolling: touch; }
.nx-prose pre code { background: none; padding: 0; color: inherit; }
.nx-prose table { display: block; width: 100%; overflow-x: auto; border-collapse: collapse; margin: 1.2em 0; font-size: .92rem; }
.nx-prose th, .nx-prose td { padding: 9px 12px; border: 1px solid var(--nx-line-strong); }
.nx-prose th { background: var(--nx-surface-2); }
.nx-prose iframe, .nx-prose video { max-width: 100%; border-radius: var(--nx-r); }
/* 富文本里历史内容常带内联深色字, 暗色主题下强制可读 */
:root:not([data-theme="light"]) .nx-prose [style*="color"] { color: inherit !important; }
:root:not([data-theme="light"]) .nx-prose [style*="background"] { background: transparent !important; }

/* CKEditor 编辑器外框适配 */
.django-ckeditor-widget { display: block !important; width: 100%; }
.cke { border: 1px solid var(--nx-line-strong) !important; border-radius: var(--nx-r) !important; overflow: hidden; box-shadow: none !important; }

/* ---------- 评论 ---------- */
.nx-comment { display: flex; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--nx-line); }
.nx-comment__main { flex: 1; min-width: 0; }
.nx-comment__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; margin-bottom: 4px; font-size: .86rem; }
.nx-comment__head b { color: var(--nx-text); }
.nx-comment__head time, .nx-comment__head span { color: var(--nx-text-3); font-size: .78rem; }
.nx-comment__children { margin-top: 8px; padding-left: 14px; border-left: 2px solid var(--nx-line); }
.nx-comment__children .nx-comment { padding: 10px 0; }

/* ---------- 首页 Hero ---------- */
.nx-hero { position: relative; padding-block: clamp(32px, 7vw, 92px) clamp(24px, 4vw, 52px); }
.nx-hero__grid { display: grid; gap: 32px; align-items: center; }
.nx-hero__title { margin: 0 0 18px; font-size: clamp(2.1rem, 1.2rem + 4.2vw, 4.2rem); line-height: 1.08; letter-spacing: -.02em; }
.nx-hero__title em { font-style: normal; color: var(--nx-accent); text-shadow: 0 0 34px rgba(53, 224, 194, .45); }
.nx-hero__lead { max-width: 56ch; margin-bottom: 26px; color: var(--nx-text-2); font-size: clamp(1rem, .95rem + .3vw, 1.14rem); }
.nx-hero__visual { position: relative; aspect-ratio: 1; max-width: 460px; width: 100%; margin-inline: auto; }
.nx-hero__visual canvas { width: 100%; height: 100%; display: block; }
.nx-hero__ring { position: absolute; inset: 4%; border: 1px dashed var(--nx-line-strong); border-radius: 50%; animation: nx-rot 40s linear infinite; }
.nx-hero__ring:nth-child(2) { inset: 14%; border-style: solid; border-color: var(--nx-line); animation-duration: 28s; animation-direction: reverse; }
.nx-hero__ring::before { content: ""; position: absolute; top: -4px; left: 50%; width: 8px; height: 8px; border-radius: 50%; background: var(--nx-accent); box-shadow: 0 0 14px var(--nx-accent); }
@keyframes nx-rot { to { transform: rotate(360deg); } }
.nx-typed::after { content: "▍"; margin-left: 2px; color: var(--nx-accent); animation: nx-blink 1s steps(1) infinite; }
@media (min-width: 1024px) { .nx-hero__grid { grid-template-columns: 1.15fr .85fr; } }
@media (max-width: 1023.98px) { .nx-hero__visual { max-width: 300px; order: -1; } }
@media (max-width: 639.98px) { .nx-hero__visual { max-width: 200px; } }
.nx-sectionhead { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.nx-sectionhead h2 { margin: 0; display: flex; align-items: center; gap: 10px; }
.nx-sectionhead h2 small { color: var(--nx-text-3); font: 400 .7rem/1 var(--nx-font-mono); letter-spacing: .16em; }
.nx-more { color: var(--nx-text-2); font-size: .86rem; white-space: nowrap; }
.nx-more i { transition: transform .25s; display: inline-block; }
.nx-more:hover i { transform: translateX(4px); }

/* ---------- 页脚 ---------- */
.nx-footer { flex: none; margin-top: 24px; padding: 26px 0 calc(var(--nx-tabbar-h) + 26px); border-top: 1px solid var(--nx-line); background: var(--nx-bg-2); color: var(--nx-text-3); font-size: .82rem; }
.nx-footer__inner { display: grid; gap: 14px; }
.nx-footer b { color: var(--nx-text-2); font-weight: 500; }
.nx-footer__status { display: inline-flex; align-items: center; gap: 8px; font: 400 .72rem var(--nx-font-mono); letter-spacing: .08em; }
.nx-footer__status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--nx-ok); box-shadow: 0 0 10px var(--nx-ok); animation: nx-blink 2s infinite; }
@media (min-width: 640px) { .nx-footer__inner { grid-template-columns: 1fr auto; align-items: end; } }
@media (min-width: 640px) and (max-width: 1023.98px) { .nx-footer { padding-bottom: 96px; } }

/* ---------- 进场动效 (nx.js IntersectionObserver 触发) ---------- */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--nx-ease), transform .7s var(--nx-ease); transition-delay: calc(var(--i, 0) * 60ms); }
[data-reveal="left"] { transform: translateX(-24px); }
[data-reveal="zoom"] { transform: scale(.94); }
[data-reveal].is-in { opacity: 1; transform: none; }
.no-js [data-reveal] { opacity: 1; transform: none; }

/* ---------- 工具类 ---------- */
.nx-mono { font-family: var(--nx-font-mono); }
.nx-display { font-family: var(--nx-font-display); }
.nx-muted { color: var(--nx-text-2); } .nx-dim { color: var(--nx-text-3); } .nx-accent { color: var(--nx-accent); }
.nx-ok { color: var(--nx-ok); } .nx-warn { color: var(--nx-warn); } .nx-danger { color: var(--nx-danger); }
.nx-small { font-size: .84rem; } .nx-tiny { font-size: .75rem; }
.nx-center { text-align: center; } .nx-right { text-align: right; }
.nx-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nx-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.nx-grow { flex: 1; min-width: 0; } .nx-ml-auto { margin-left: auto; }
.nx-mt-0 { margin-top: 0; } .nx-mt-1 { margin-top: 8px; } .nx-mt-2 { margin-top: 16px; } .nx-mt-3 { margin-top: 24px; } .nx-mt-4 { margin-top: 40px; }
.nx-mb-0 { margin-bottom: 0; } .nx-mb-1 { margin-bottom: 8px; } .nx-mb-2 { margin-bottom: 16px; } .nx-mb-3 { margin-bottom: 24px; } .nx-mb-4 { margin-bottom: 40px; }
.nx-w-full { width: 100%; }
.nx-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (max-width: 639.98px) { .nx-hide-mobile { display: none !important; } }
@media (min-width: 640px) and (max-width: 1023.98px) { .nx-hide-tablet { display: none !important; } }
@media (min-width: 1024px) { .nx-hide-desktop { display: none !important; } }
@media (min-width: 640px) { .nx-only-mobile { display: none !important; } }

/* ---------- 无障碍: 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
    [data-reveal] { opacity: 1; transform: none; }
    .nx-backdrop canvas { display: none; }
}
@media print {
    .nx-topbar, .nx-tabbar, .nx-footer, .nx-backdrop, .nx-fab, .nx-toasts { display: none !important; }
    .nx-main { padding: 0; }
    body { background: #fff; color: #000; }
}