:root {
  --audio-ink: #0b1d3a;
  --audio-deep: #050d1a;
  --audio-blue: #0284c7;
  --audio-cyan: #06b6d4;
  --audio-amber: #f59e0b;
  --audio-coral: #f43f5e;
  --audio-emerald: #10b981;
  --md-primary-fg-color: #0b1d3a;
  --md-primary-fg-color--light: #163666;
  --md-primary-fg-color--dark: #061021;
  --md-accent-fg-color: #06b6d4;
  --md-default-bg-color: #f7f9fb;
  --md-code-bg-color: #eaf1f7;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #080f1d;
  --md-default-fg-color: rgba(235, 243, 255, .9);
  --md-default-fg-color--light: rgba(235, 243, 255, .62);
  --md-code-bg-color: #0e1a2f;
  --md-typeset-a-color: #38bdf8;
}

body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; }
.md-header { background: linear-gradient(105deg, var(--audio-deep), var(--audio-ink)); box-shadow: none; }
.md-banner { color: #dce8e4; background: var(--audio-deep); }
.audio-announce { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .5rem 1rem; font-size: .58rem; }
.audio-announce nav, .audio-announce a { display: inline-flex; align-items: center; gap: .42rem; }
.audio-announce a { color: #fff; }
.audio-announce a:hover { text-decoration: underline; }
.audio-announce a:focus-visible { outline: 2px solid #fff; outline-offset: 4px; }
.audio-announce em { color: #b9d5df; font: normal .58rem monospace; }
.audio-announce-mark { display: inline-grid; place-items: center; width: 1.45rem; height: 1.45rem; border: 1px solid #718a9a; font: 800 .48rem monospace; }
.audio-reading-track { position: fixed; z-index: 20; top: 0; left: 0; width: 100%; height: 3px; pointer-events: none; }
.audio-reading-bar { display: block; width: 0; height: 100%; background: linear-gradient(90deg,var(--audio-cyan),var(--audio-amber)); }
.audio-side-tools { margin: .35rem .6rem 1rem; padding: .75rem; border: 1px solid var(--md-default-fg-color--lightest); border-radius: .5rem; background: var(--md-code-bg-color); }
.audio-side-tools__head { display: flex; justify-content: space-between; gap: .5rem; margin-bottom: .5rem; font: 700 .5rem/1.3 monospace; }
.audio-side-progress { height: .22rem; border-radius: 999px; background: var(--md-default-fg-color--lightest); overflow: hidden; }
.audio-side-progress span { display: block; width: 0; height: 100%; background: var(--audio-cyan); }
@media (max-width: 480px) { .audio-announce em { display: none; } }
.md-tabs { background: var(--audio-ink); }
.md-typeset h1, .md-typeset h2, .md-typeset h3 { letter-spacing: -.025em; }
.md-typeset h1 { color: var(--audio-ink); font-weight: 800; }
[data-md-color-scheme="slate"] .md-typeset h1 { color: #e0f2fe; }
.md-typeset h2 { padding-bottom: .45rem; border-bottom: 1px solid rgba(6, 182, 212, .18); font-weight: 750; }

.audio-home-hero { position: relative; isolation: isolate; overflow: hidden; margin: 0 0 4rem; padding: clamp(2rem, 6vw, 4.5rem); color: #f4efe6; background: radial-gradient(circle at 83% 18%, rgba(6, 182, 212, .26), transparent 25%), radial-gradient(circle at 15% 75%, rgba(245, 158, 11, .15), transparent 30%), linear-gradient(135deg, #0b1d3a, #050d1a); box-shadow: 1rem 1rem 0 rgba(6, 182, 212, .12); }
.audio-home-hero::after { content: ""; position: absolute; z-index: -1; inset: 0; opacity: .14; background-image: linear-gradient(rgba(255,255,255,.28) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.28) 1px, transparent 1px); background-size: 2rem 2rem; mask-image: linear-gradient(90deg, transparent, #000 58%); }
.audio-home-kicker { display: flex; align-items: center; gap: .6rem; margin: 0 0 1.35rem; color: var(--audio-cyan); font: 800 .56rem/1.4 monospace; letter-spacing: .16em; text-transform: uppercase; }
.audio-home-kicker span { width: 1.4rem; height: 1px; background: var(--audio-cyan); }
.md-typeset .audio-home-hero h1 { max-width: 38rem; margin: 0; color: #fff; font-size: clamp(2.4rem, 7vw, 4.8rem); line-height: .98; letter-spacing: -.06em; }
.audio-home-lead { max-width: 44rem; margin: 1.35rem 0 0; color: rgba(244, 239, 230, .75); font-size: .82rem; line-height: 1.85; }
.audio-home-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .8rem; max-width: 38rem; margin-top: 2rem; }
.audio-home-stats span { color: rgba(244, 239, 230, .5); font: 700 .5rem/1.45 monospace; letter-spacing: .06em; text-transform: uppercase; }
.audio-home-stats strong { display: block; margin-bottom: .2rem; color: var(--audio-cyan); font-size: 1rem; }

.audio-home-section { margin: 4.2rem 0; }
.audio-home-section-head { display: grid; grid-template-columns: 7.2rem minmax(0, 1fr); gap: 1.2rem; align-items: start; margin-bottom: 1.8rem; }
.audio-home-section-head p { margin: .15rem 0 0; color: var(--audio-blue); font: 800 .52rem/1.4 monospace; letter-spacing: .13em; text-transform: uppercase; }
.md-typeset .audio-home-section-head h2 { max-width: 34rem; margin: 0; padding: 0; border: 0; font-size: clamp(1.55rem, 4vw, 2.25rem); line-height: 1.18; }
.audio-home-flow { display: flex; align-items: center; gap: .45rem; padding: 1.4rem; border: 1px solid rgba(6, 182, 212, .18); overflow-x: auto; background: rgba(255,255,255,.4); }
.audio-home-flow a { flex: 1 0 4.6rem; display: grid; place-items: center; min-height: 3rem; border: 1px solid rgba(6, 182, 212, .25); color: var(--audio-ink); background: rgba(255,255,255,.75); font: 800 .58rem/1 monospace; letter-spacing: .05em; text-align: center; }
.audio-home-flow a:hover { color: #fff; background: var(--audio-ink); }
.audio-home-flow i { color: var(--audio-cyan); font-style: normal; }
.audio-home-flow-note { margin: .85rem 0 0; color: var(--md-default-fg-color--light); font-size: .68rem; line-height: 1.7; }
.audio-route-grid, .audio-practice-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; }
.audio-route-card, .audio-practice-grid > a { display: block; min-height: 9.4rem; padding: 1.2rem; border: 1px solid rgba(6, 182, 212, .18); color: var(--md-default-fg-color); background: rgba(255,255,255,.45); transition: transform 160ms ease, background 160ms ease; }
.audio-route-card:hover, .audio-practice-grid > a:hover { color: var(--md-default-fg-color); background: rgba(255,255,255,.8); transform: translateY(-.18rem); }
.audio-route-card > span, .audio-practice-grid > a > span { color: var(--audio-blue); font: 800 .48rem/1 monospace; letter-spacing: .1em; text-transform: uppercase; }
.md-typeset .audio-route-card h3 { margin: 1rem 0 .6rem; font-size: .9rem; }
.audio-route-card p, .audio-practice-grid p { margin: 0; color: var(--md-default-fg-color--light); font-size: .63rem; line-height: 1.7; }
.audio-module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid rgba(6, 182, 212, .18); }
.audio-module-grid a { display: grid; grid-template-columns: 2rem minmax(0, 1fr) auto; gap: .8rem; align-items: center; min-height: 4.1rem; padding: .75rem .7rem .75rem 0; border-bottom: 1px solid rgba(6, 182, 212, .12); color: var(--md-default-fg-color); }
.audio-module-grid a:nth-child(odd) { margin-right: 1.1rem; }
.audio-module-grid a:nth-child(even) { margin-left: 1.1rem; }
.audio-module-grid a:hover { color: var(--audio-blue); padding-left: .35rem; }
.audio-module-grid span { color: var(--audio-cyan); font: 800 .54rem/1 monospace; }
.audio-module-grid strong { font-size: .72rem; }
.audio-module-grid em { color: var(--md-default-fg-color--light); font: 600 .48rem/1 monospace; font-style: normal; }
.audio-practice-grid > a strong { display: block; margin: .9rem 0 .5rem; font-size: .82rem; }

[data-md-color-scheme="slate"] .audio-home-flow,
[data-md-color-scheme="slate"] .audio-route-card,
[data-md-color-scheme="slate"] .audio-practice-grid > a { background: rgba(255,255,255,.025); }
[data-md-color-scheme="slate"] .audio-home-flow a { color: #e0f2fe; background: rgba(255,255,255,.04); }
[data-md-color-scheme="slate"] .audio-home-flow a:hover { background: var(--audio-blue); }
[data-md-color-scheme="slate"] .audio-route-card:hover,
[data-md-color-scheme="slate"] .audio-practice-grid > a:hover { background: rgba(255,255,255,.06); }