/* ============================================================
   揭开黑箱 · 延伸学习（learn/）
   复用 ../css/app.css 的配色、顶栏、字体；这里只放本页自己的版式。
   本页是普通的滚动文档：app.css 给应用页锁住了 body 的滚动，这里放开。
   ============================================================ */

html { height: auto; scroll-padding-top: calc(var(--top) + 18px); }
body.learn { height: auto; min-height: 100%; overflow-x: hidden; overflow-y: auto; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

.learn a { color: inherit; }
/* 代码和命令里不要把 >= 之类连成一个符号（看起来像 ≥，照着敲会出错） */
.learn pre, .learn code, .env span.mono { font-variant-ligatures: none; font-feature-settings: "liga" 0, "calt" 0; }
.learn :focus-visible { outline: 2px solid rgba(94, 240, 212, .7); outline-offset: 2px; border-radius: 6px; }

/* ---------------- 顶栏补充：本页目录、进度 ---------------- */

.lp-jump { flex: 1; min-width: 0; display: flex; justify-content: flex-end; gap: 2px; font-size: 12.5px; white-space: nowrap; overflow: hidden; }
.lp-jump a { padding: 4px 9px; border-radius: 8px; color: var(--dim); text-decoration: none; transition: color .2s, background .2s; }
.lp-jump a:hover { color: var(--ink); background: rgba(255, 255, 255, .05); }
.lp-jump a.on { color: var(--ink); }
.lp-prog-btn { text-decoration: none; color: var(--acc); min-width: 62px; }
.lp-prog-btn .ring { position: absolute; inset: -1px; border-radius: inherit; padding: 1.5px; background: conic-gradient(var(--acc) calc(var(--p, 0) * 360deg), transparent 0); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0); pointer-events: none; transition: --p .6s; }
.lp-prog-txt { color: var(--dim); }
.lp-prog-txt b { color: var(--acc); font-weight: 400; }

/* ---------------- 版心 ---------------- */

.lp { position: relative; z-index: 5; max-width: 1240px; margin: 0 auto; padding: calc(var(--top) + 46px) 32px 40px; }
.lp-loading { color: var(--faint); font-size: 13px; padding: 40px 0; }

.lp-hero { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 48px; align-items: center; padding: 10px 0 34px; }
.hero-main > * { animation: rise .9s var(--ease) backwards; }
.hero-main > :nth-child(2) { animation-delay: .08s; }
.hero-main > :nth-child(3) { animation-delay: .16s; }
.hero-main > :nth-child(4) { animation-delay: .24s; }

/* 首屏右边的“深度计”：路线的六段，每段一格一格显示学完了几站，点一下滚到那一段 */
.gauge { position: relative; padding: 16px 18px 14px; border-radius: 16px; border: 1px solid var(--line); background: rgba(8, 13, 25, .72); animation: rise .9s var(--ease) .3s backwards; }
.gauge-h { display: flex; justify-content: space-between; margin-bottom: 8px; font-family: var(--mono); font-size: 10px; letter-spacing: .16em; color: var(--faint); }
.gauge ol { position: relative; list-style: none; margin: 0; padding: 0; }
.gauge ol::before { content: ""; position: absolute; left: 4px; top: 16px; bottom: 16px; width: 1px; background: linear-gradient(to bottom, rgba(150, 180, 230, .35), rgba(179, 157, 255, .3)); transform-origin: top; animation: grow 1.4s var(--ease) .45s backwards; }
@keyframes grow { from { transform: scaleY(0); } }
.gauge li { animation: rise .7s var(--ease) backwards; animation-delay: calc(.5s + var(--i) * 90ms); }
.gauge a { position: relative; display: grid; grid-template-columns: 9px 26px 1fr auto; align-items: center; gap: 10px; padding: 7px 0; text-decoration: none; color: var(--ink2); }
.gauge a:hover { color: var(--ink); }
.gauge a:hover .g-dot { border-color: var(--acc); }
.g-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--bg); border: 1.5px solid rgba(150, 180, 230, .5); transition: background .3s, border-color .3s; }
.g-no { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.g-t { font-family: var(--serif); font-weight: 600; font-size: 14.5px; letter-spacing: .03em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.g-cells { display: flex; gap: 3px; }
.g-cells i { width: 11px; height: 5px; border-radius: 2px; background: rgba(150, 180, 230, .16); transition: background .4s; }
.g-cells i.on { background: var(--acc); }
.gauge li.full .g-dot { background: var(--acc); border-color: var(--acc); }
.gauge li.full .g-no { color: var(--acc); }
.gauge-f { margin-top: 8px; padding-top: 9px; border-top: 1px solid var(--line); font-size: 11.5px; color: var(--faint); line-height: 1.6; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }
.lp-hero h1 { margin: 10px 0 14px; font-family: var(--serif); font-weight: 900; font-size: clamp(38px, 5.2vw, 62px); line-height: 1.12; letter-spacing: .05em; }
.lede { margin: 0; max-width: 760px; font-size: 16.5px; line-height: 1.9; color: var(--ink2); }
.lp-stats { display: flex; flex-wrap: wrap; gap: 10px 34px; margin: 26px 0 0; }
.lp-stats div { display: flex; align-items: baseline; gap: 10px; }
.lp-stats dt { font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; color: var(--faint); }
.lp-stats dd { margin: 0; color: var(--dim); font-size: 13.5px; }
.lp-stats b { font-family: var(--mono); font-weight: 400; font-size: 20px; color: var(--ink); margin: 0 1px; }
.lp-stats .checked { flex-basis: 100%; font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: .04em; }

.lp-sec { padding: 54px 0 20px; border-top: 1px solid var(--line); margin-top: 26px; }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; margin-bottom: 28px; }
.sec-head h2 { margin: 6px 0 10px; font-family: var(--serif); font-weight: 900; font-size: clamp(26px, 3vw, 34px); letter-spacing: .04em; line-height: 1.25; }
.sec-desc { margin: 0; max-width: 700px; font-size: 14.5px; line-height: 1.85; color: var(--ink2); }

/* ---------------- 路线图 ---------------- */

.rm-progress { flex: none; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.rm-meter { display: flex; align-items: center; gap: 12px; }
.rm-bar { width: 160px; height: 4px; border-radius: 4px; background: var(--line2); overflow: hidden; }
.rm-bar i { display: block; height: 100%; width: 0; background: var(--acc); transition: width .8s var(--ease); }
.rm-count { font-family: var(--mono); font-weight: 400; font-size: 13px; color: var(--acc); min-width: 52px; text-align: right; }

.rm { position: relative; padding: 18px 0 8px; }
.rm-svg { position: absolute; left: 0; top: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; z-index: 0; }
.rm-track { fill: none; stroke: rgba(150, 180, 230, .22); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.rm-seg { fill: none; stroke: var(--acc); stroke-width: 2.4; stroke-linecap: round; opacity: .75; transition: stroke-dashoffset 1s var(--ease); }
.rm-trav { fill: #d8fff6; opacity: .85; }
.rm-start { fill: var(--bg); stroke: rgba(150, 180, 230, .45); stroke-width: 1.5; }

.rm-stage { position: relative; z-index: 1; margin: 0 0 58px; }
.rm-stage:last-child { margin-bottom: 10px; }
.rm-stage-h { display: flex; align-items: baseline; gap: 14px; margin: 0 6px 26px; }
.rm-stage.rev .rm-stage-h { justify-content: flex-end; }
.rm-no { font-family: var(--mono); font-size: 12px; letter-spacing: .18em; color: var(--acc); opacity: .8; }
.rm-stage-h h3 { margin: 0; font-family: var(--serif); font-weight: 600; font-size: 21px; letter-spacing: .04em; }
.rm-stage-h .sub { font-size: 13px; color: var(--dim); }
.rm-stage-h .cnt { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.rm-stage-h .cnt.full { color: var(--acc); }

.rm-row { display: flex; gap: 18px; align-items: stretch; }
.rm-stage.rev .rm-row { flex-direction: row-reverse; }
.rm-node { position: relative; flex: 1 1 0; min-width: 0; max-width: 312px; display: flex; flex-direction: column; padding: 22px 16px 12px; border-radius: 14px; border: 1px solid var(--line2); background: rgba(9, 15, 28, .94); transition: border-color .3s, background .4s, transform .35s var(--ease), opacity .7s var(--ease); }
.rm-node:hover { border-color: var(--line3); transform: translateY(-2px); }
.rm.anim .rm-node:not(.lit) { opacity: 0; transform: translateY(10px); }
.rm-node.done { border-color: rgba(94, 240, 212, .34); background: linear-gradient(160deg, rgba(94, 240, 212, .07), rgba(9, 15, 28, .94) 55%); }
.rm-node.flash { animation: flash 1.6s ease; }
@keyframes flash { 0%, 60% { border-color: rgba(255, 182, 92, .8); } }

.rm-dot { position: absolute; left: 50%; top: 0; width: 20px; height: 20px; margin: -10px 0 0 -10px; border-radius: 50%; display: grid; place-items: center; background: var(--bg); border: 1.5px solid rgba(150, 180, 230, .45); cursor: pointer; transition: background .3s, border-color .3s, transform .3s var(--ease); }
.rm-dot::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: rgba(150, 180, 230, .55); transition: opacity .2s; }
.rm-dot svg { position: absolute; width: 12px; height: 12px; opacity: 0; transform: scale(.4); transition: opacity .25s, transform .4s var(--ease); }
.rm-node:hover .rm-dot { border-color: var(--acc); }
.rm-node.done .rm-dot { background: var(--acc); border-color: var(--acc); }
.rm-node.done .rm-dot::before { opacity: 0; }
.rm-node.done .rm-dot svg { opacity: 1; transform: none; }
.rm-node.pop .rm-dot { animation: pop .5s var(--ease); }
.rm-node.pop .rm-dot::after { content: ""; position: absolute; inset: -2px; border-radius: 50%; border: 1.5px solid var(--acc); animation: ripple .8s ease-out forwards; }
@keyframes pop { 40% { transform: scale(1.3); } }
@keyframes ripple { to { transform: scale(2.6); opacity: 0; } }

.rm-k { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; color: var(--faint); }
.rm-node h4 { margin: 4px 0 6px; font-family: var(--serif); font-weight: 600; font-size: 16.5px; line-height: 1.4; letter-spacing: .02em; }
.rm-goal { margin: 0 0 12px; font-size: 13.5px; line-height: 1.72; color: var(--ink2); }
.rm-lab { display: block; margin: 0 0 5px; font-family: var(--mono); font-size: 9.5px; letter-spacing: .16em; color: var(--faint); }
.rm-site { margin-bottom: 12px; display: flex; flex-wrap: wrap; gap: 5px; }
.rm-site .rm-lab { flex-basis: 100%; margin: 0; }
.site-chip { display: inline-flex; align-items: center; gap: 5px; max-width: 100%; padding: 3px 9px; border-radius: 8px; border: 1px solid rgba(94, 240, 212, .22); background: rgba(94, 240, 212, .05); color: #a9f5e5 !important; font-size: 12px; line-height: 1.45; text-decoration: none; transition: border-color .2s, background .2s; }
.site-chip:hover { border-color: rgba(94, 240, 212, .55); background: rgba(94, 240, 212, .1); }
.site-chip::before { content: "◆"; font-size: 7px; color: var(--acc); opacity: .7; }
.site-chip.soon { border-color: rgba(179, 157, 255, .25); background: rgba(179, 157, 255, .05); color: #d6cbff !important; }
.site-chip.soon::before { color: var(--violet); }

.rm-res { list-style: none; margin: 0 0 10px; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.rm-res a { display: grid; grid-template-columns: auto 1fr; column-gap: 7px; align-items: start; text-decoration: none; font-size: 12.5px; line-height: 1.5; color: var(--ink2); transition: color .2s; }
.rm-res a:hover { color: var(--ink); }
.rm-res a:hover .t { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line3); }
.rm-res .t { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pf { display: inline-block; margin-top: 2px; padding: 0 5px; border-radius: 5px; border: 1px solid var(--line2); font-family: var(--mono); font-size: 9.5px; line-height: 15px; color: var(--dim); white-space: nowrap; }
.pf.zh { color: var(--acc); border-color: rgba(94, 240, 212, .3); }

.rm-foot { margin-top: auto; padding-top: 8px; border-top: 1px dashed var(--line); display: flex; justify-content: flex-end; }
.rm-done { display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 11px; border-radius: 999px; border: 1px solid var(--line2); background: none; color: var(--dim); font-size: 12px; cursor: pointer; transition: color .2s, border-color .2s, background .2s; }
.rm-done:hover { color: var(--ink); border-color: var(--line3); }
.rm-done .box { width: 12px; height: 12px; border-radius: 3px; border: 1.4px solid currentColor; display: grid; place-items: center; }
.rm-done .box svg { width: 9px; height: 9px; opacity: 0; }
.rm-done[aria-pressed="true"] { color: #04121a; background: var(--acc); border-color: var(--acc); font-weight: 600; }
.rm-done[aria-pressed="true"] .box svg { opacity: 1; }

.rm-end { position: relative; flex: 0 0 auto; align-self: flex-start; margin-top: 0; padding: 18px 16px 12px; border-radius: 14px; border: 1px dashed var(--line2); max-width: 230px; font-size: 13px; color: var(--dim); line-height: 1.7; }
.rm-end .rm-dot { cursor: default; border-style: dashed; }
.rm-end a { color: var(--acc); text-decoration: none; }
.rm-end a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------------- 资源库 ---------------- */

.lib-ctl { display: flex; flex-direction: column; gap: 10px; margin: 0 0 26px; }
.search { display: flex; align-items: center; gap: 9px; height: 40px; padding: 0 14px; border-radius: 12px; border: 1px solid var(--line2); background: rgba(255, 255, 255, .03); color: var(--dim); transition: border-color .2s; max-width: 520px; }
.search:focus-within { border-color: rgba(94, 240, 212, .5); }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; color: var(--ink); font: inherit; font-size: 14.5px; }
.search input:focus-visible { outline: none; }
.search input::placeholder { color: var(--faint); }
.search input::-webkit-search-cancel-button { filter: invert(.6); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.chip-rows { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.chips .lab { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; color: var(--faint); margin-right: 3px; }
.chip { --h: 186; display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 11px; border-radius: 999px; border: 1px solid var(--line2); background: rgba(255, 255, 255, .02); color: var(--ink2); font-size: 13px; cursor: pointer; transition: color .2s, border-color .2s, background .2s; }
.chip:hover { color: var(--ink); border-color: var(--line3); }
.chip .d { width: 7px; height: 7px; border-radius: 50%; background: hsl(var(--h), 62%, 62%); }
.chip i { font-style: normal; font-family: var(--mono); font-size: 10.5px; color: var(--faint); }
.chip[aria-pressed="true"] { color: var(--ink); border-color: hsla(var(--h), 70%, 62%, .6); background: hsla(var(--h), 70%, 55%, .12); }
.chip[aria-pressed="true"] i { color: var(--ink2); }
.chip[disabled] { opacity: .35; cursor: default; }
.lib-count { display: flex; align-items: center; gap: 14px; font-size: 12.5px; color: var(--dim); }
.lib-count b { font-family: var(--mono); font-weight: 400; color: var(--ink); }

.lib-group { margin: 0 0 34px; }
.lib-group-h { display: flex; align-items: baseline; gap: 10px; margin: 0 0 14px; }
.lib-group-h h3 { margin: 0; font-family: var(--serif); font-weight: 600; font-size: 19px; letter-spacing: .04em; }
.lib-group-h .d { width: 8px; height: 8px; border-radius: 50%; background: hsl(var(--h), 62%, 62%); align-self: center; }
.lib-group-h i { font-style: normal; font-family: var(--mono); font-size: 11px; color: var(--faint); }
.lib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; }
.res { --h: 186; position: relative; display: flex; flex-direction: column; gap: 7px; padding: 14px 16px 13px; border-radius: 12px; border: 1px solid var(--line); background: rgba(10, 16, 30, .86); transition: border-color .25s, transform .3s var(--ease); animation: rise .5s var(--ease) backwards; animation-delay: calc(var(--i, 0) * 22ms); }
.res::before { content: ""; position: absolute; left: -1px; top: 14px; bottom: 14px; width: 2px; border-radius: 2px; background: hsla(var(--h), 62%, 62%, .7); }
.res:hover { border-color: var(--line3); transform: translateY(-2px); }
.res-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; font-size: 11px; color: var(--dim); }
.res-meta .ty { color: var(--ink2); }
.lv { display: inline-flex; align-items: center; gap: 3px; }
.lv b { width: 5px; height: 5px; border-radius: 50%; background: var(--line3); }
.lv b.on { background: var(--amber); }
.lv span { margin-left: 3px; }
.res h4 { margin: 0; font-size: 15px; font-weight: 600; line-height: 1.5; }
.res h4 a { text-decoration: none; color: var(--ink); transition: color .2s; }
.res h4 a:hover { color: var(--acc); }
.res h4 a::after { content: " ↗"; font-family: var(--mono); font-size: 11px; color: var(--faint); }
.res .by { font-size: 12px; color: var(--dim); }
.res .why { margin: 0; font-size: 13px; line-height: 1.7; color: var(--ink2); }
.res .on-route { align-self: flex-start; margin-top: 2px; font-family: var(--mono); font-size: 10.5px; color: var(--faint); text-decoration: none; letter-spacing: .02em; }
.res .on-route:hover { color: var(--acc); }
mark { background: rgba(255, 182, 92, .26); color: inherit; border-radius: 3px; padding: 0 1px; }
.empty { padding: 30px 0; color: var(--dim); font-size: 14px; }

/* ---------------- 术语表 ---------------- */

.gl-ctl { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; margin-bottom: 24px; }
.gl-ctl .search { flex: 1 1 300px; }
.seg { display: inline-flex; padding: 3px; border-radius: 999px; border: 1px solid var(--line2); background: rgba(255, 255, 255, .02); }
.seg button { height: 30px; padding: 0 14px; border-radius: 999px; border: 0; background: none; color: var(--dim); font-size: 13px; cursor: pointer; transition: color .2s, background .2s; }
.seg button[aria-checked="true"] { color: #04121a; background: var(--acc); font-weight: 600; }
.az-rail { flex-basis: 100%; display: flex; flex-wrap: wrap; gap: 3px; }
.az-rail a, .az-rail span { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 7px; font-family: var(--mono); font-size: 12px; text-decoration: none; }
.az-rail a { color: var(--ink2); border: 1px solid var(--line2); }
.az-rail a:hover { color: var(--acc); border-color: rgba(94, 240, 212, .5); }
.az-rail span { color: var(--faint); opacity: .45; }
.gl-group { margin: 0 0 30px; }
.gl-group-h { display: flex; align-items: baseline; gap: 10px; margin: 0 0 12px; }
.gl-group-h h3 { margin: 0; font-family: var(--serif); font-weight: 600; font-size: 19px; letter-spacing: .04em; }
.gl-group-h.az h3 { font-family: var(--mono); font-weight: 700; font-size: 20px; color: var(--acc); }
.gl-group-h i { font-style: normal; font-family: var(--mono); font-size: 11px; color: var(--faint); }
.gl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 10px 14px; }
.term { --h: 186; padding: 12px 14px 11px; border-radius: 12px; border: 1px solid var(--line); background: rgba(10, 16, 30, .8); animation: rise .45s var(--ease) backwards; animation-delay: calc(var(--i, 0) * 14ms); }
.term-h { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; margin-bottom: 4px; }
.term-h dfn { font-style: normal; font-family: var(--serif); font-weight: 600; font-size: 16px; letter-spacing: .02em; color: var(--ink); }
.term-h .en { font-family: var(--mono); font-size: 11px; color: var(--dim); }
.term-h .g { margin-left: auto; font-size: 10.5px; color: hsl(var(--h), 55%, 70%); }
.term p { margin: 0 0 8px; font-size: 13.5px; line-height: 1.72; color: var(--ink2); }
.term .where { display: flex; flex-wrap: wrap; gap: 5px; }
.term .site-chip { font-size: 11.5px; padding: 2px 8px; }

/* ---------------- 动手试试 ---------------- */

.try { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 20px; align-items: start; }
.try-tabs { position: sticky; top: calc(var(--top) + 16px); display: flex; flex-direction: column; gap: 6px; }
.try-tab { display: grid; grid-template-columns: 24px 1fr; gap: 2px 8px; text-align: left; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--line); background: rgba(10, 16, 30, .7); color: var(--ink2); cursor: pointer; transition: border-color .2s, color .2s, background .2s; }
.try-tab:hover { color: var(--ink); border-color: var(--line3); }
.try-tab .n { grid-row: span 2; font-size: 17px; color: var(--dim); line-height: 1.3; }
.try-tab b { font-weight: 600; font-size: 13.5px; line-height: 1.45; }
.try-tab small { font-family: var(--mono); font-size: 10px; color: var(--faint); letter-spacing: .04em; }
.try-tab[aria-selected="true"] { color: var(--ink); border-color: rgba(94, 240, 212, .5); background: rgba(94, 240, 212, .07); }
.try-tab[aria-selected="true"] .n { color: var(--acc); }
.try-panel { min-width: 0; padding: 20px 22px 22px; border-radius: 16px; border: 1px solid var(--line2); background: rgba(9, 14, 27, .94); animation: rise .45s var(--ease); }
.try-panel h3 { margin: 0 0 6px; font-family: var(--serif); font-weight: 600; font-size: 20px; letter-spacing: .03em; }
.try-goal { margin: 0 0 12px; font-size: 14px; line-height: 1.8; color: var(--ink2); }
.env { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 16px; }
.env span { padding: 3px 9px; border-radius: 8px; border: 1px solid var(--line2); font-size: 12px; color: var(--ink2); }
.env span.cpu { color: #04121a; background: var(--acc); border-color: var(--acc); font-weight: 600; }
.env span.mono { font-family: var(--mono); font-size: 11.5px; }
.env .time { border: 0; padding: 3px 2px; color: var(--dim); font-size: 12px; }
.codebox { margin: 0 0 14px; border-radius: 12px; border: 1px solid var(--line2); background: #050a15; overflow: hidden; }
.codebox-h { display: flex; align-items: center; gap: 10px; padding: 7px 8px 7px 14px; border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: 11.5px; color: var(--dim); }
.codebox-h .fn { color: var(--ink2); }
.codebox-h .lang { color: var(--faint); }
.copy { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 11px; border-radius: 8px; border: 1px solid var(--line2); background: rgba(255, 255, 255, .03); color: var(--ink2); font-family: var(--sans); font-size: 12px; cursor: pointer; transition: color .2s, border-color .2s, background .2s; }
.copy:hover { color: var(--ink); border-color: var(--line3); }
.copy.ok { color: #04121a; background: var(--acc); border-color: var(--acc); }
.copy.err { color: var(--rose); border-color: rgba(255, 107, 147, .5); }
.codebox pre { margin: 0; padding: 14px 16px 16px; overflow-x: auto; font-family: var(--mono); font-size: 12.5px; line-height: 1.7; color: #d7deec; tab-size: 4; scrollbar-width: thin; scrollbar-color: var(--line2) transparent; }
.codebox pre .c { color: #6c7a96; }
.codebox pre .s { color: #ffd29a; }
.codebox pre .k { color: #c9a2ff; }
.codebox pre .n { color: #7fe6cf; }
.codebox pre .f { color: #8fc2ff; }
.out { margin: 4px 0 14px; }
.out-h { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; color: var(--faint); }
.out-h::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--amber); }
.out pre { margin: 0; max-height: 300px; overflow: auto; padding: 12px 14px; border-radius: 10px; border: 1px dashed var(--line2); background: rgba(255, 182, 92, .025); font-family: var(--mono); font-size: 12px; line-height: 1.65; color: #e6d9c4; white-space: pre; scrollbar-width: thin; scrollbar-color: var(--line2) transparent; }
.try-explain { margin: 0 0 12px; font-size: 13.5px; line-height: 1.8; color: var(--ink2); }
.try-site { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 12px; color: var(--faint); }
.tested { margin: 10px 0 0; padding-left: 12px; border-left: 2px solid var(--line2); font-size: 12.5px; line-height: 1.75; color: var(--dim); max-width: 760px; }
.try-note { margin: -4px 0 14px; padding: 9px 12px; border-radius: 10px; background: rgba(107, 155, 255, .06); border: 1px solid rgba(107, 155, 255, .18); font-size: 12.5px; line-height: 1.75; color: var(--ink2); }

/* ---------------- 页脚 ---------------- */

.lp-foot { margin-top: 60px; padding: 24px 0 10px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 30px; font-size: 12.5px; line-height: 1.8; color: var(--dim); }
.lp-foot p { margin: 0; max-width: 820px; }
.lp-foot a { color: var(--ink2); text-underline-offset: 3px; }
.lp-foot code { font-family: var(--mono); font-size: 11.5px; color: var(--ink2); }

/* ---------------- 窄屏 ---------------- */

/* 路线图：窄于 1100 时改成一列，线走在左边 */
@media (max-width: 1099px) {
  .lp-hero { grid-template-columns: minmax(0, 1fr) 290px; gap: 30px; }
  .rm-row, .rm-stage.rev .rm-row { flex-direction: column; gap: 14px; padding-left: 34px; }
  .rm-stage-h, .rm-stage.rev .rm-stage-h { justify-content: flex-start; margin-left: 34px; flex-wrap: wrap; row-gap: 2px; }
  .rm-node { max-width: none; flex: none; padding-top: 16px; }
  .rm-dot { left: -25px; top: 27px; margin: -10px 0 0 -10px; }
  .rm-end { max-width: none; }
  .rm-end .rm-dot { left: -25px; top: 27px; }
  .rm-stage { margin-bottom: 40px; }
  .try { grid-template-columns: 1fr; }
  .try-tabs { position: static; flex-direction: row; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; }
  .try-tab { flex: 0 0 auto; grid-template-columns: auto auto; align-items: center; padding: 8px 12px; white-space: nowrap; }
  .try-tab .n { grid-row: auto; font-size: 15px; }
  .try-tab b { font-size: 13px; }
  .try-tab small { display: none; }
}
@media (max-width: 900px) {
  .lp-jump { display: none; }
  .top-actions { margin-left: auto; }
}
@media (max-width: 760px) {
  .lp { padding: calc(var(--top) + 26px) 16px 30px; }
  .lp-hero { grid-template-columns: 1fr; gap: 22px; }
  .gauge { padding: 12px 14px 10px; }
  .gauge a { padding: 5px 0; }
  .lp-hero h1 { letter-spacing: .03em; }
  .lede { font-size: 15.5px; }
  .lp-stats { gap: 8px 22px; }
  .lp-sec { padding-top: 40px; }
  .sec-head { flex-direction: column; align-items: stretch; gap: 14px; }
  .rm-progress { align-items: flex-start; flex-direction: row; justify-content: space-between; }
  .rm-bar { width: 120px; }
  .chip-rows { gap: 6px 14px; }
  .chip { height: 28px; padding: 0 9px; font-size: 12.5px; }
  .lib-grid, .gl-grid { grid-template-columns: 1fr; }
  .try-panel { padding: 16px 14px 18px; }
  .codebox pre { font-size: 11.5px; padding: 12px; }
}
@media (max-width: 560px) {
  .lp-prog-btn { min-width: 52px; padding: 0 8px; }
  .lib-ctl .chips .lab { display: none; }
}

/* 英文模式：拉丁字体排在中文字体前面（中文字体里的弯引号、撇号、破折号是全角的，夹在英文里会空出一大块）；代码里的中文提示词、诗句照常落到后面的中文字体 */
html[lang="en"] { --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Liberation Sans", "DejaVu Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif; }