:root {
  color-scheme: light;
  --bg: #eef3f8;
  --panel: #ffffff;
  --panel-soft: #f7f9fc;
  --text: #172033;
  --muted: #68758a;
  --line: #d9e1ec;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --navy: #091426;
  --coral: #e85d50;
  --mint: #139b78;
  --shadow: 0 24px 65px rgba(15, 23, 42, 0.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #08111f;
  --panel: #0e1a2d;
  --panel-soft: #13223a;
  --text: #f3f7ff;
  --muted: #9dacbf;
  --line: #263750;
  --accent: #78a3ff;
  --accent-dark: #5b8cff;
  --navy: #050b15;
  --coral: #ff7a6e;
  --mint: #65d9ba;
  --shadow: 0 24px 65px rgba(0, 0, 0, 0.34);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; min-height: 100vh; overflow-x: hidden; color: var(--text); background: radial-gradient(circle at 78% 0%, rgba(37, 99, 235, 0.11), transparent 34rem), var(--bg); }
a { color: inherit; }
button, select { font: inherit; }
h1, h2, p { margin-top: 0; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.audio-guide-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.audio-guide-shell { width: min(1220px, calc(100% - 40px)); margin: 0 auto; padding: 22px 0 44px; }

.audio-guide-topbar { position: relative; z-index: 30; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 22px; align-items: center; margin-bottom: 20px; }
.audio-guide-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; }
.audio-guide-brand img { width: 39px; height: 39px; border-radius: 10px; box-shadow: 0 9px 22px rgba(37, 99, 235, 0.22); }
.audio-guide-brand > span { display: flex; align-items: baseline; gap: 6px; }
.audio-guide-brand strong { font-size: 16px; letter-spacing: -.35px; }
.audio-guide-brand em { color: var(--accent); font-size: 9px; font-style: normal; font-weight: 900; letter-spacing: 1.5px; }
.audio-guide-nav { display: flex; align-items: center; justify-content: center; gap: 4px; }
.audio-guide-nav a { padding: 9px 11px; border-radius: 8px; color: var(--muted); font-size: 12px; font-weight: 750; text-decoration: none; }
.audio-guide-nav a:hover, .audio-guide-nav a.is-active { color: var(--accent); background: rgba(37, 99, 235, 0.08); }
.audio-guide-controls { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.audio-guide-controls .quick-share-language-control { min-width: 178px; }
.audio-guide-controls [data-theme-switcher] button { min-height: 40px; }

.audio-guide-hero { position: relative; display: grid; min-height: 590px; grid-template-columns: minmax(0, .92fr) minmax(470px, 1.08fr); gap: clamp(35px, 6vw, 78px); align-items: center; overflow: hidden; padding: clamp(32px, 5vw, 68px); border: 1px solid var(--line); border-radius: 28px; background: linear-gradient(145deg, color-mix(in srgb, var(--panel) 96%, var(--accent) 4%), var(--panel)); box-shadow: var(--shadow); }
.audio-guide-hero::before { position: absolute; top: -180px; right: -150px; width: 520px; height: 520px; border: 1px solid rgba(37, 99, 235, .1); border-radius: 50%; box-shadow: 0 0 0 62px rgba(37, 99, 235, .025), 0 0 0 124px rgba(37, 99, 235, .018); content: ""; }
.audio-guide-hero-copy { position: relative; z-index: 2; }
.audio-guide-kicker { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 15px; color: var(--accent); font-size: 11px; font-weight: 900; letter-spacing: 1.5px; text-transform: uppercase; }
.audio-guide-kicker > i { width: 8px; height: 8px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 5px color-mix(in srgb, var(--coral) 12%, transparent); }
.audio-guide-hero h1 { max-width: 600px; margin-bottom: 18px; font-size: clamp(42px, 6.2vw, 76px); line-height: .98; letter-spacing: -3.4px; }
.audio-guide-hero-copy > p { max-width: 650px; margin-bottom: 25px; color: var(--muted); font-size: clamp(16px, 1.6vw, 19px); line-height: 1.65; }
.audio-guide-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.audio-guide-button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 9px; padding: 0 17px; border: 1px solid var(--accent); border-radius: 11px; color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-dark)); box-shadow: 0 12px 26px rgba(37, 99, 235, .22); font-size: 12px; font-weight: 850; text-decoration: none; transition: transform 160ms ease, box-shadow 160ms ease; }
.audio-guide-button:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(37, 99, 235, .28); }
.audio-guide-button svg { width: 17px; height: 17px; }
.audio-guide-button.is-secondary { border-color: var(--line); color: var(--text); background: var(--panel); box-shadow: none; }
.audio-guide-signals { display: flex; flex-wrap: wrap; gap: 12px 18px; margin-top: 25px; color: var(--muted); font-size: 10px; font-weight: 700; }
.audio-guide-signals > span { display: flex; align-items: center; gap: 6px; }
.audio-guide-signals i { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); }

.audio-guide-demo { position: relative; z-index: 1; min-height: 430px; }
.audio-guide-tv { position: absolute; top: 20px; right: 0; width: min(100%, 500px); padding: 15px; border: 1px solid rgba(128, 161, 217, .24); border-radius: 20px; color: #eef4ff; background: #091426; box-shadow: 0 30px 70px rgba(4, 10, 22, .3); transform: perspective(1000px) rotateY(-4deg); }
.audio-guide-tv::after { position: absolute; top: 100%; left: 44%; width: 18%; height: 28px; border-bottom: 5px solid #1d2a3f; content: ""; }
.audio-guide-tv-bar { display: flex; align-items: center; justify-content: space-between; padding: 3px 3px 13px; color: #8192ad; font-size: 7px; letter-spacing: 1px; }
.audio-guide-tv-bar span { display: flex; align-items: center; gap: 6px; }
.audio-guide-tv-bar i { width: 5px; height: 5px; border-radius: 50%; background: #ff7467; }
.audio-guide-tv-bar b { color: #82e4c9; }
.audio-guide-tv-body { display: grid; grid-template-columns: 128px minmax(0, 1fr) 82px; gap: 16px; align-items: center; padding: 20px; border: 1px solid rgba(128, 161, 217, .14); border-radius: 14px; background: linear-gradient(135deg, #14284a, #0b1729); }
.audio-guide-tv-body > img { width: 128px; aspect-ratio: 1; object-fit: cover; border-radius: 10px; box-shadow: 0 14px 28px rgba(0, 0, 0, .34); }
.audio-guide-tv-body > div:nth-child(2) { display: grid; min-width: 0; gap: 5px; }
.audio-guide-tv-body small { color: #76a0ff; font-size: 6px; font-weight: 850; letter-spacing: 1px; }
.audio-guide-tv-body strong { overflow: hidden; font-size: 20px; letter-spacing: -.6px; text-overflow: ellipsis; white-space: nowrap; }
.audio-guide-tv-body div > span { color: #91a1b8; font-size: 9px; }
.audio-guide-progress { height: 3px; margin-top: 12px; overflow: hidden; border-radius: 5px; background: rgba(255, 255, 255, .12); }
.audio-guide-progress i { display: block; width: 58%; height: 100%; background: #648fff; }
.audio-guide-qr { display: grid; aspect-ratio: 1; grid-template-columns: repeat(3, 1fr); gap: 4px; padding: 9px; border-radius: 9px; background: #fff; }
.audio-guide-qr span { border-radius: 2px; background: #101b2d; }
.audio-guide-qr span:nth-child(2), .audio-guide-qr span:nth-child(4), .audio-guide-qr span:nth-child(9) { background: #fff; }
.audio-guide-phone { position: absolute; right: -14px; bottom: 0; width: 205px; padding: 14px; border: 5px solid #15233a; border-radius: 26px; color: #eef4ff; background: #071120; box-shadow: 0 25px 55px rgba(0, 0, 0, .38); transform: rotate(3deg); }
.audio-guide-phone-top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 13px; border-bottom: 1px solid rgba(149, 171, 206, .13); color: #7ee0c5; font-size: 7px; }
.audio-guide-phone-top i { width: 30px; height: 5px; border-radius: 10px; background: #1b2b43; }
.audio-guide-phone > small { display: block; margin: 13px 0 8px; color: #79a2ff; font-size: 6px; font-weight: 850; letter-spacing: 1px; }
.audio-guide-phone-row { display: grid; grid-template-columns: 35px minmax(0, 1fr) auto; gap: 7px; align-items: center; margin-top: 6px; padding: 7px; border: 1px solid rgba(149, 171, 206, .11); border-radius: 9px; background: rgba(255, 255, 255, .025); }
.audio-guide-phone-row img { width: 35px; height: 35px; object-fit: cover; border-radius: 6px; }
.audio-guide-phone-row span { display: grid; min-width: 0; gap: 2px; }
.audio-guide-phone-row b, .audio-guide-phone-row i { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.audio-guide-phone-row b { font-size: 7px; }
.audio-guide-phone-row i { color: #8292aa; font-size: 5px; font-style: normal; }
.audio-guide-phone-row em { color: #9db9ff; font-size: 6px; font-style: normal; }
.audio-guide-phone button { width: 100%; min-height: 29px; margin-top: 10px; border: 1px solid rgba(99, 142, 244, .25); border-radius: 8px; color: #abc3ff; background: rgba(91, 140, 255, .1); font-size: 6px; font-weight: 850; }
.audio-guide-scan-line { position: absolute; top: 80px; right: 70px; width: 200px; height: 2px; opacity: .45; background: linear-gradient(90deg, transparent, #68ddb9, transparent); box-shadow: 0 0 15px #68ddb9; animation: audio-guide-scan 3.2s ease-in-out infinite; }
@keyframes audio-guide-scan { 50% { transform: translateY(165px); } }

.audio-guide-section { margin-top: 22px; padding: clamp(28px, 4vw, 48px); border: 1px solid var(--line); border-radius: 22px; background: var(--panel); box-shadow: 0 14px 34px rgba(15, 23, 42, .05); }
.audio-guide-section-head { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 18px; align-items: start; margin-bottom: 28px; }
.audio-guide-number { display: grid; width: 42px; height: 42px; place-items: center; border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--line)); border-radius: 12px; color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); font-size: 10px; font-weight: 900; }
.audio-guide-section-head h2 { margin-bottom: 8px; font-size: clamp(25px, 3vw, 36px); letter-spacing: -1.2px; }
.audio-guide-section-head p { max-width: 760px; margin-bottom: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.audio-guide-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 0; padding: 0; list-style: none; }
.audio-guide-steps li { display: grid; min-height: 190px; grid-template-rows: auto 1fr; gap: 24px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel-soft); }
.audio-guide-steps li > span { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 9px; color: #fff; background: var(--accent); font-size: 9px; font-weight: 900; }
.audio-guide-steps li div { align-self: end; }
.audio-guide-steps strong, .audio-guide-source-grid strong, .audio-guide-rule-grid strong { display: block; margin-bottom: 7px; font-size: 15px; }
.audio-guide-steps p, .audio-guide-source-grid p, .audio-guide-rule-grid p { margin-bottom: 0; color: var(--muted); font-size: 12px; line-height: 1.6; }

.audio-guide-source-grid { display: grid; gap: 10px; }
.audio-guide-source-grid article { position: relative; display: grid; grid-template-columns: 44px minmax(0, 1fr) auto; gap: 15px; align-items: center; padding: 20px; border: 1px solid var(--line); border-radius: 15px; background: var(--panel-soft); }
.audio-guide-card-icon { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 12px; color: var(--accent); background: rgba(37, 99, 235, .1); }
.audio-guide-card-icon.is-youtube { color: var(--coral); background: color-mix(in srgb, var(--coral) 11%, transparent); }
.audio-guide-card-icon.is-upload { color: var(--mint); background: color-mix(in srgb, var(--mint) 11%, transparent); }
.audio-guide-source-tag { padding: 6px 8px; border: 1px solid var(--line); border-radius: 7px; color: var(--muted); font-size: 7px; font-weight: 900; letter-spacing: 1px; }
.audio-guide-rule-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.audio-guide-rule-grid article { display: grid; min-height: 185px; grid-template-rows: auto 1fr; gap: 26px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel-soft); }
.audio-guide-rule-grid article > span { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 11px; color: var(--accent); background: rgba(37, 99, 235, .09); }
.audio-guide-rule-grid article > div { align-self: end; }

.audio-guide-final { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-top: 22px; padding: clamp(30px, 5vw, 54px); overflow: hidden; border-radius: 22px; color: #f4f8ff; background: radial-gradient(circle at 85% 0%, rgba(91, 140, 255, .25), transparent 22rem), #091426; box-shadow: var(--shadow); }
.audio-guide-final h2 { margin-bottom: 9px; font-size: clamp(28px, 4vw, 43px); letter-spacing: -1.5px; }
.audio-guide-final p { max-width: 720px; margin-bottom: 0; color: #a7b5ca; line-height: 1.65; }
.audio-guide-final .audio-guide-kicker { color: #8aafff; }
.audio-guide-final .audio-guide-button { flex: 0 0 auto; }
.audio-guide-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding: 28px 4px 0; color: var(--muted); font-size: 11px; }
.audio-guide-footer nav { display: flex; flex-wrap: wrap; gap: 13px; }
.audio-guide-footer a { text-decoration: none; }
.audio-guide-footer a:hover { color: var(--accent); }

:root[dir="rtl"] .audio-guide-tv { right: auto; left: 0; transform: perspective(1000px) rotateY(4deg); }
:root[dir="rtl"] .audio-guide-phone { right: auto; left: -14px; transform: rotate(-3deg); }
:root[dir="rtl"] .audio-guide-scan-line { right: auto; left: 70px; }

@media (max-width: 1040px) {
  .audio-guide-topbar { grid-template-columns: auto 1fr; }
  .audio-guide-nav { justify-content: flex-end; }
  .audio-guide-controls { grid-column: 1 / -1; }
  .audio-guide-controls .quick-share-language-switcher { flex: 1; }
  .audio-guide-hero { grid-template-columns: 1fr; }
  .audio-guide-hero-copy { max-width: 760px; }
  .audio-guide-demo { width: min(680px, 100%); margin: 0 auto; }
}

@media (max-width: 720px) {
  .audio-guide-shell { width: min(100% - 24px, 1220px); padding-top: 12px; }
  .audio-guide-topbar { grid-template-columns: 1fr auto; gap: 12px; }
  .audio-guide-nav { grid-column: 1 / -1; order: 3; justify-content: flex-start; overflow-x: auto; }
  .audio-guide-nav a { flex: 0 0 auto; }
  .audio-guide-controls { grid-column: auto; }
  .audio-guide-controls .quick-share-language-switcher { width: 52px; flex: 0 0 52px; }
  .audio-guide-controls .quick-share-language-control { min-width: 52px; }
  .audio-guide-controls .quick-share-language-current-text { display: none; }
  .audio-guide-controls .quick-share-language-menu { width: 260px; }
  .audio-guide-hero { min-height: 0; padding: 29px 22px 36px; }
  .audio-guide-hero h1 { letter-spacing: -2.2px; }
  .audio-guide-demo { min-height: 360px; transform: scale(.87); transform-origin: top center; margin-bottom: -45px; }
  .audio-guide-tv { right: 50%; width: 500px; transform: translateX(50%); }
  :root[dir="rtl"] .audio-guide-tv { right: auto; left: 50%; transform: translateX(-50%); }
  .audio-guide-phone { right: calc(50% - 230px); }
  :root[dir="rtl"] .audio-guide-phone { right: auto; left: calc(50% - 230px); }
  .audio-guide-steps, .audio-guide-rule-grid { grid-template-columns: 1fr; }
  .audio-guide-steps li, .audio-guide-rule-grid article { min-height: 150px; }
  .audio-guide-final { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 500px) {
  .audio-guide-brand > span { display: grid; gap: 0; }
  .audio-guide-brand strong { font-size: 13px; }
  .audio-guide-hero h1 { font-size: 41px; }
  .audio-guide-actions { display: grid; }
  .audio-guide-button { width: 100%; }
  .audio-guide-demo { min-height: 310px; transform: scale(.7); margin: 0 -60px -90px; width: calc(100% + 120px); }
  .audio-guide-section { padding: 24px 18px; }
  .audio-guide-section-head { grid-template-columns: 38px minmax(0, 1fr); gap: 12px; }
  .audio-guide-number { width: 36px; height: 36px; }
  .audio-guide-source-grid article { grid-template-columns: 40px minmax(0, 1fr); padding: 16px; }
  .audio-guide-source-tag { grid-column: 2; justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}