@font-face {
    font-family: "TsangerJinKai02";
    src: url("https://cdn.jsdelivr.net/gh/AlfredoSequeworthy/TsangerJinKai02@main/TsangerJinKai02-W04.woff2") format("woff2");
    font-weight: 400;
    font-display: swap;
}

@font-face {
    font-family: "TsangerJinKai02";
    src: url("https://cdn.jsdelivr.net/gh/AlfredoSequeworthy/TsangerJinKai02@main/TsangerJinKai02-W05.woff2") format("woff2");
    font-weight: 500;
    font-display: swap;
}

:root {
    --paper: #f5f0e6;
    --paper-light: #fcf8ef;
    --paper-deep: #e9dfd0;
    --ink: #17130e;
    --ink-soft: #413a31;
    --muted: #72685b;
    --line: #dcd1c1;
    --line-soft: #e9dfd2;
    --orange: #ff6a2a;
    --orange-soft: #f28a4b;
    --orange-tint: #f8e3d5;
    --brass: #d5b278;
    --night: #080706;
    --night-soft: #18130e;
    --warm-white: #f4e8d0;
    --serif: Charter, Georgia, "TsangerJinKai02", "Source Han Serif SC", "Songti SC", serif;
    --cn-serif: "TsangerJinKai02", "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, Georgia, serif;
    --ui: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "PingFang SC", monospace;
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    background: var(--paper);
}

body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 7% 1%, rgba(255,255,255,.68), transparent 25rem),
        linear-gradient(90deg, transparent 0, rgba(136,111,77,.025) 49.8%, transparent 50.2%),
        var(--paper);
    font-family: var(--cn-serif);
    font-size: 16px;
    line-height: 1.65;
    letter-spacing: .015em;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 100;
    padding: 8px 12px;
    transform: translateY(-160%);
    border-radius: 8px;
    background: var(--ink);
    color: var(--paper-light);
    font-family: var(--ui);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
    position: fixed;
    z-index: 50;
    top: 18px;
    left: 50%;
    width: min(1180px, calc(100% - 36px));
    height: 62px;
    padding: 8px 10px 8px 12px;
    transform: translateX(-50%);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    border: 1px solid transparent;
    border-radius: 18px;
    transition: background .3s, border-color .3s, box-shadow .3s, top .3s;
}

.site-header.is-scrolled {
    top: 10px;
    background: rgba(245, 240, 230, .86);
    border-color: rgba(220, 209, 193, .88);
    box-shadow: 0 12px 34px rgba(44, 31, 18, .06);
    backdrop-filter: blur(18px) saturate(130%);
}

.brand, .footer-brand { display: flex; align-items: center; }
.brand { gap: 10px; width: max-content; font-size: 18px; font-weight: 500; }
.brand img, .footer-brand img { border-radius: 12px; box-shadow: 0 3px 14px rgba(20, 14, 7, .12); }

.nav-links {
    display: flex;
    gap: 28px;
    color: var(--muted);
    font-family: var(--ui);
    font-size: 13px;
}
.nav-links a { transition: color .18s; }
.nav-links a:hover { color: var(--orange); }

.nav-download {
    justify-self: end;
    padding: 9px 16px;
    border-radius: 999px;
    background: var(--ink);
    color: var(--paper-light);
    font-family: var(--ui);
    font-size: 13px;
    transition: background .18s, transform .18s;
}
.nav-download:hover { background: var(--orange); transform: translateY(-1px); }

main, .footer { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.hero {
    min-height: 100svh;
    padding: 142px 0 92px;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(410px, .78fr);
    gap: clamp(50px, 7vw, 108px);
    align-items: center;
    border-bottom: 1px solid var(--line);
}

.eyebrow, .section-index {
    margin: 0;
    color: #9a4b27;
    font-family: var(--ui);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: .13em;
    text-transform: uppercase;
}
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { width: 24px; height: 2px; border-radius: 2px; background: var(--orange); }

.hero h1 {
    margin: 26px 0 0;
    max-width: 700px;
    font-size: clamp(62px, 7.7vw, 106px);
    font-weight: 500;
    line-height: 1.02;
    letter-spacing: -.035em;
    text-wrap: balance;
}
.hero h1 em { color: #a34c24; font-style: normal; }

.hero-lede {
    max-width: 640px;
    margin: 30px 0 0;
    color: var(--ink-soft);
    font-size: clamp(18px, 2vw, 21px);
    line-height: 1.72;
    text-wrap: pretty;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
    min-height: 52px;
    padding: 0 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    border: 1px solid #9a4b27;
    border-radius: 999px;
    font-family: var(--ui);
    font-size: 15px;
    font-weight: 500;
    transition: background .2s, color .2s, transform .2s, box-shadow .2s;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: #9a4b27; color: var(--paper-light); }
.button-primary:hover { background: var(--orange); box-shadow: 0 10px 28px rgba(154,75,39,.16); }
.button-primary svg { width: 19px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.7; }
.button-secondary { color: #8f4726; }
.button-secondary:hover { background: var(--orange-tint); }

.hero-facts {
    margin: 46px 0 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, max-content);
    gap: clamp(22px, 4vw, 48px);
    list-style: none;
}
.hero-facts li { display: flex; flex-direction: column; }
.hero-facts b { font-size: 16px; font-weight: 500; font-variant-numeric: lining-nums tabular-nums; }
.hero-facts span { margin-top: 2px; color: var(--muted); font-family: var(--ui); font-size: 12px; }

.hero-visual { position: relative; min-height: 740px; perspective: 1200px; }
.visual-caption {
    position: absolute;
    z-index: 8;
    top: 6px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    color: var(--muted);
    font-family: var(--ui);
    font-size: 10px;
    letter-spacing: .08em;
}

.phone-frame {
    --tilt-x: 0deg;
    --tilt-y: 0deg;
    position: absolute;
    z-index: 5;
    top: 42px;
    left: 50%;
    width: 336px;
    aspect-ratio: 1200 / 2608;
    padding: 8px;
    transform: translateX(-50%) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) rotate(1.2deg);
    border-radius: 48px;
    background: #16130f;
    box-shadow: 0 38px 84px rgba(38, 25, 12, .25), 0 1px 0 rgba(255,255,255,.35) inset;
    transition: transform .28s cubic-bezier(.2,.8,.2,1);
    overflow: hidden;
}
.phone-frame::after {
    content: "";
    position: absolute;
    inset: 8px;
    z-index: 3;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 40px;
    pointer-events: none;
}
.phone-frame img { width: 100%; height: 100%; display: block; object-fit: cover; border-radius: 40px; }
.phone-speaker {
    position: absolute;
    z-index: 4;
    top: 15px;
    left: 50%;
    width: 92px;
    height: 25px;
    transform: translateX(-50%);
    border-radius: 999px;
    background: #0b0907;
    box-shadow: 0 1px 0 rgba(255,255,255,.07) inset;
}

.phone-glow {
    position: absolute;
    z-index: 1;
    top: 160px;
    left: 50%;
    width: 460px;
    height: 460px;
    transform: translateX(-50%);
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,106,42,.16), rgba(213,178,120,.07) 38%, transparent 70%);
    filter: blur(8px);
}

.signal-orbit {
    position: absolute;
    z-index: 2;
    top: 325px;
    left: 50%;
    border: 1px solid rgba(154,75,39,.22);
    border-radius: 50%;
    transform: translate(-50%,-50%) rotate(-12deg);
}
.signal-orbit::after {
    content: "";
    position: absolute;
    top: 50%;
    left: -4px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--orange);
    box-shadow: 0 0 18px rgba(255,106,42,.65);
}
.orbit-a { width: 500px; height: 260px; animation: orbit-turn 16s linear infinite; }
.orbit-b { width: 430px; height: 520px; opacity: .45; animation: orbit-turn-back 22s linear infinite; }

.signal-note {
    position: absolute;
    z-index: 7;
    min-width: 128px;
    padding: 10px 13px;
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 7px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: rgba(252,248,239,.88);
    box-shadow: 0 12px 32px rgba(47,31,15,.07);
    backdrop-filter: blur(12px);
}
.signal-note b { color: #8f4726; font-family: var(--ui); font-size: 12px; }
.signal-note span { grid-column: 1 / -1; color: var(--muted); font-family: var(--ui); font-size: 10px; }
.signal-note i { width: 7px; height: 7px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 5px rgba(255,106,42,.1); animation: pulse-dot 2s ease-out infinite; }
.note-live { top: 248px; left: -24px; }
.note-local { top: 528px; right: -18px; }
.note-local b { grid-column: 1 / -1; font-family: var(--serif); font-size: 23px; line-height: 1; }

.statement { padding: 112px 0 118px; border-bottom: 1px solid var(--line); }
.statement blockquote { margin: 28px 0 0; max-width: 1050px; font-size: clamp(34px, 5.5vw, 68px); font-weight: 400; line-height: 1.28; letter-spacing: -.02em; }
.statement em { color: #9a4b27; font-style: normal; }

.section { padding: 116px 0; border-bottom: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: minmax(360px,.95fr) minmax(320px,.65fr); gap: clamp(44px,8vw,116px); align-items: end; }
.section-heading .section-index { grid-column: 1 / -1; }
.section-heading h2, .roaming-copy h2, .system-copy h2, .download h2 { margin: 18px 0 0; font-size: clamp(44px, 6vw, 72px); font-weight: 500; line-height: 1.1; letter-spacing: -.025em; }
.section-heading > p:last-child, .roaming-copy > p, .system-copy > p, .download-copy > p:not(.section-index) { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.78; }
.section-heading.compact { display: block; max-width: 820px; }

.receiver {
    --dial-angle: 0deg;
    margin-top: 66px;
    min-height: 680px;
    padding: clamp(28px,5vw,58px);
    overflow: hidden;
    position: relative;
    border-radius: 38px;
    background:
        radial-gradient(circle at 88% 10%, rgba(255,106,42,.16), transparent 32%),
        radial-gradient(circle at 10% 90%, rgba(213,178,120,.09), transparent 28%),
        linear-gradient(145deg, #17120d, #050504 70%);
    color: var(--warm-white);
    box-shadow: 0 30px 78px rgba(28,20,12,.16), 0 1px 0 rgba(255,255,255,.06) inset;
}
.receiver::before {
    content: "";
    position: absolute;
    inset: 14px;
    border: 1px solid rgba(213,178,120,.12);
    border-radius: 28px;
    pointer-events: none;
}
.receiver-topline { display: flex; justify-content: space-between; color: rgba(244,232,208,.42); font: 10px/1 var(--mono); letter-spacing: .12em; }
.receiver-status { display: flex; align-items: center; gap: 8px; }
.receiver-status i { width: 6px; height: 6px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 12px var(--orange); }

.receiver-display { margin-top: 70px; display: grid; grid-template-columns: 1fr auto; gap: 42px; align-items: end; }
.station-kicker { margin: 0 0 14px; color: var(--orange-soft); font: 600 11px/1 var(--ui); letter-spacing: .12em; }
.station-copy h3 { margin: 0; color: var(--warm-white); font-size: clamp(32px,5vw,58px); font-weight: 500; line-height: 1.1; transition: opacity .2s, transform .25s, filter .25s; }
.station-copy > p:last-child { margin: 13px 0 0; color: rgba(244,232,208,.52); font-size: 14px; transition: opacity .2s, transform .25s; }
.frequency { display: flex; align-items: baseline; gap: 12px; color: var(--brass); }
.frequency strong { font: 500 clamp(54px,9vw,108px)/.82 var(--mono); letter-spacing: -.08em; font-variant-numeric: tabular-nums; transition: opacity .2s, filter .25s; }
.frequency span { color: rgba(244,232,208,.45); font: 11px/1 var(--ui); }
.receiver.is-tuning .station-copy h3, .receiver.is-tuning .station-copy > p:last-child, .receiver.is-tuning .frequency strong { opacity: .25; filter: blur(5px); transform: translateY(4px); }

.receiver-scale { margin-top: 55px; height: 56px; display: grid; grid-template-columns: auto repeat(6,1fr) auto; gap: 0; align-items: end; position: relative; color: rgba(244,232,208,.36); font: 10px/1 var(--mono); }
.receiver-scale::before { content: ""; position: absolute; left: 24px; right: 24px; top: 32px; border-top: 1px solid rgba(213,178,120,.28); }
.receiver-scale i { width: 1px; height: 13px; justify-self: center; background: rgba(213,178,120,.34); }
.receiver-scale b { --needle-x: -36px; position: absolute; z-index: 2; top: 10px; left: 50%; width: 2px; height: 37px; transform: translateX(var(--needle-x)); border-radius: 2px; background: var(--orange); box-shadow: 0 0 18px rgba(255,106,42,.72); transition: transform .5s cubic-bezier(.2,.8,.2,1); }

.receiver-controls { margin-top: 68px; display: grid; grid-template-columns: 1fr auto 1fr; gap: clamp(28px,5vw,72px); align-items: center; }
.receiver-key { justify-self: center; width: 88px; height: 88px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; border: 1px solid rgba(213,178,120,.18); border-radius: 50%; background: rgba(255,255,255,.025); color: var(--warm-white); font-size: 25px; cursor: pointer; transition: transform .2s, background .2s, border-color .2s; }
.receiver-key span { color: rgba(244,232,208,.36); font: 8px/1 var(--mono); letter-spacing: .14em; }
.receiver-key:hover { transform: translateY(-2px); background: rgba(255,106,42,.08); border-color: rgba(255,106,42,.34); }
.dial { justify-self: center; border: 0; background: transparent; color: var(--warm-white); cursor: grab; }
.dial:active { cursor: grabbing; }
.dial-face { width: 170px; height: 170px; display: block; position: relative; border: 1px solid rgba(213,178,120,.38); border-radius: 50%; background: repeating-radial-gradient(circle, #252019 0 2px, #0d0b09 3px 5px); box-shadow: 0 18px 42px rgba(0,0,0,.38), 0 0 0 12px rgba(213,178,120,.035); transform: rotate(var(--dial-angle)); transition: transform .7s cubic-bezier(.18,.82,.2,1); }
.dial-face::before { content: ""; position: absolute; inset: 24px; border-radius: 50%; background: radial-gradient(circle at 35% 28%, #3c3429, #110e0b 62%); box-shadow: 0 1px 0 rgba(255,255,255,.07) inset; }
.dial-face i { position: absolute; z-index: 2; top: 18px; left: 50%; width: 4px; height: 26px; transform: translateX(-50%); border-radius: 3px; background: var(--orange); box-shadow: 0 0 14px rgba(255,106,42,.45); }
.dial small { display: block; margin-top: 19px; color: rgba(244,232,208,.45); font: 10px/1 var(--ui); letter-spacing: .14em; }
.receiver-footnote { margin: 34px 0 0; color: rgba(244,232,208,.27); font: 10px/1.5 var(--ui); text-align: center; }

.roaming-section, .system-section { padding: 46px 0; border-bottom: 1px solid var(--line); }
.roaming-panel, .system-panel {
    min-height: 720px;
    padding: clamp(38px,6vw,78px);
    display: grid;
    grid-template-columns: .82fr minmax(430px,.9fr);
    gap: clamp(48px,7vw,96px);
    align-items: center;
    overflow: hidden;
    border-radius: 38px;
    background: radial-gradient(circle at 92% 6%, #302115 0, transparent 34%), linear-gradient(145deg, #17120e, var(--night) 70%);
    color: var(--warm-white);
    box-shadow: 0 30px 78px rgba(28,20,12,.16);
}
.section-index.light { color: var(--orange-soft); }
.roaming-copy h2, .system-copy h2 { color: var(--warm-white); }
.roaming-copy > p, .system-copy > p { margin-top: 24px; color: rgba(244,232,208,.58); }
.roaming-place { margin-top: 38px; padding: 20px 0; display: flex; flex-direction: column; border-top: 1px solid rgba(213,178,120,.13); border-bottom: 1px solid rgba(213,178,120,.13); }
.roaming-place span { color: var(--orange-soft); font: 11px/1 var(--ui); letter-spacing: .1em; }
.roaming-place b { margin-top: 9px; color: var(--warm-white); font-size: 22px; font-weight: 500; }
.roaming-place small { margin-top: 5px; color: rgba(244,232,208,.36); font: 10px/1 var(--mono); }
.roam-button { width: 100%; margin-top: 20px; padding: 16px 18px; display: flex; align-items: center; justify-content: space-between; border: 1px solid rgba(213,178,120,.2); border-radius: 15px; background: rgba(255,255,255,.035); color: var(--warm-white); cursor: pointer; transition: background .2s, border-color .2s, transform .2s; }
.roam-button span { font-size: 14px; }
.roam-button i { color: var(--orange); font-style: normal; font-size: 20px; }
.roam-button:hover { transform: translateY(-2px); background: rgba(255,106,42,.08); border-color: rgba(255,106,42,.3); }
.is-roaming .roam-button { pointer-events: none; }

.globe-stage { min-width: 0; position: relative; display: flex; flex-direction: column; align-items: center; }
.globe { position: relative; z-index: 2; width: min(100%,560px); height: auto; overflow: visible; filter: drop-shadow(0 30px 50px rgba(0,0,0,.32)); }
.globe-halo { position: absolute; z-index: 1; top: 50%; left: 50%; width: 80%; aspect-ratio: 1; transform: translate(-50%,-55%); border-radius: 50%; background: radial-gradient(circle, rgba(255,106,42,.1), transparent 65%); filter: blur(12px); }
.active-point { transition: transform .42s cubic-bezier(.2,.8,.2,1); }
.active-point circle:first-child { animation: globe-pulse 2.3s ease-out infinite; transform-origin: center; }
.is-roaming .globe { animation: globe-search .48s ease-in-out infinite alternate; }
.is-roaming .coastlines { opacity: .35; }
.globe-readout { width: min(420px,90%); margin-top: -7px; padding: 13px 16px; display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid rgba(213,178,120,.18); color: rgba(244,232,208,.34); font: 9px/1.4 var(--mono); }
.globe-readout b { color: var(--brass); font-weight: 500; text-align: right; }
.globe-stage > p { margin: 10px 0 0; color: rgba(244,232,208,.25); font: 9px/1.5 var(--ui); text-align: center; }

.feature-rows { margin-top: 54px; border-top: 1px solid var(--line); }
.feature-rows article { padding: 33px 0; display: grid; grid-template-columns: minmax(280px,.8fr) minmax(0,1.2fr); gap: 72px; border-bottom: 1px solid var(--line); }
.feature-name { position: relative; padding-left: 48px; }
.feature-name > span { position: absolute; left: 0; top: 7px; color: #9a4b27; font: 12px/1 var(--ui); }
.feature-name h3 { margin: 0; color: #8f4726; font-size: 25px; font-weight: 500; }
.feature-name small { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; font-style: italic; }
.feature-rows article > p { margin: 3px 0 0; color: var(--ink-soft); font-size: 15px; line-height: 1.82; }

.system-panel { grid-template-columns: .9fr minmax(390px,.72fr); background: radial-gradient(circle at 88% 10%, #322216 0, transparent 36%), linear-gradient(145deg, #17120e, #050504 70%); }
.system-points { margin: 38px 0 0; padding: 0; list-style: none; border-top: 1px solid rgba(213,178,120,.12); }
.system-points li { padding: 14px 0; display: flex; gap: 18px; border-bottom: 1px solid rgba(213,178,120,.12); color: rgba(244,232,208,.73); font-size: 14px; }
.system-points span { color: var(--orange-soft); font-family: var(--serif); }
.system-card { padding: 30px; overflow: hidden; border: 1px solid rgba(213,178,120,.14); border-radius: 30px; background: rgba(255,255,255,.045); box-shadow: 0 24px 64px rgba(0,0,0,.24); backdrop-filter: blur(18px); }
.system-card-top { display: flex; justify-content: space-between; color: rgba(244,232,208,.32); font: 9px/1 var(--mono); letter-spacing: .14em; }
.system-card-top i { width: 7px; height: 7px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 15px var(--orange); }
.mini-station { margin-top: 50px; display: flex; flex-direction: column; }
.mini-station b { color: var(--warm-white); font-size: 46px; font-weight: 500; line-height: 1; }
.mini-station span { margin-top: 10px; color: rgba(244,232,208,.52); font-size: 13px; }
.mini-station small { margin-top: 4px; color: var(--brass); font: 12px/1 var(--mono); }
.mini-wave { height: 74px; margin-top: 35px; display: flex; align-items: center; justify-content: center; gap: 8px; }
.mini-wave i { width: 3px; height: 18%; border-radius: 4px; background: linear-gradient(var(--orange), var(--brass)); animation: wave 1.5s ease-in-out infinite; }
.mini-wave i:nth-child(2n) { animation-delay: -.25s; height: 45%; }
.mini-wave i:nth-child(3n) { animation-delay: -.5s; height: 72%; }
.mini-wave i:nth-child(4n) { animation-delay: -.75s; height: 34%; }
.mini-controls { margin-top: 23px; display: flex; align-items: center; justify-content: center; gap: 38px; }
.mini-controls span { width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid rgba(213,178,120,.16); border-radius: 50%; color: rgba(244,232,208,.7); }
.mini-controls b { width: 78px; height: 78px; display: grid; place-items: center; border-radius: 50%; background: var(--orange); color: #1d0d06; font-size: 24px; box-shadow: 0 0 35px rgba(255,106,42,.22); }
.mini-actions { margin-top: 35px; padding-top: 18px; display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; border-top: 1px solid rgba(213,178,120,.1); color: rgba(244,232,208,.42); font: 9px/1 var(--ui); text-align: center; }
.system-card > p { margin: 22px 0 0; color: rgba(244,232,208,.22); font: 9px/1 var(--ui); text-align: center; }

.faq { margin-top: 50px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { padding: 24px 0; display: flex; justify-content: space-between; align-items: center; gap: 24px; cursor: pointer; list-style: none; font-size: 19px; font-weight: 500; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary span { color: #9a4b27; font-family: var(--ui); font-weight: 300; transition: transform .25s; }
.faq details[open] summary span { transform: rotate(45deg); }
.faq details p { max-width: 780px; margin: -4px 0 27px; color: var(--muted); font-size: 15px; line-height: 1.78; }

.download {
    position: relative;
    margin: 46px auto 0;
    min-height: 470px;
    padding: clamp(42px,7vw,82px);
    display: grid;
    grid-template-columns: minmax(0,1fr) auto;
    gap: 48px;
    align-items: end;
    overflow: hidden;
    border-radius: 38px;
    background: radial-gradient(circle at 88% 10%, #4a2818 0, transparent 38%), var(--night);
    color: var(--paper-light);
    box-shadow: 0 30px 78px rgba(28,20,12,.16);
}
.download-copy { position: relative; z-index: 2; }
.download h2 { color: var(--warm-white); }
.download-copy > p:not(.section-index) { max-width: 620px; margin: 22px 0 0; color: rgba(244,232,208,.58); font-size: 16px; }
.package-meta { margin-top: 29px; display: flex; flex-wrap: wrap; gap: 12px; }
.package-meta span { padding: 6px 10px; border: 1px solid rgba(213,178,120,.13); border-radius: 999px; color: rgba(244,232,208,.56); font: 10px/1 var(--ui); font-variant-numeric: lining-nums tabular-nums; }
.download-button { position: relative; z-index: 2; min-width: 280px; padding: 18px 20px; display: flex; align-items: center; justify-content: space-between; border: 1px solid rgba(213,178,120,.18); border-radius: 20px; background: var(--warm-white); color: var(--ink); transition: transform .2s, background .2s, box-shadow .2s; }
.download-button:hover { transform: translateY(-3px); background: #fff9ed; box-shadow: 0 16px 40px rgba(0,0,0,.16); }
.download-button span { display: flex; flex-direction: column; font: 500 19px/1.2 var(--ui); }
.download-button small { margin-bottom: 5px; color: var(--muted); font-size: 9px; letter-spacing: .12em; }
.download-button b { color: var(--orange); font-size: 32px; font-weight: 400; }
.download-signal { position: absolute; z-index: 1; top: 32px; right: 60px; width: 350px; height: 220px; display: flex; align-items: center; justify-content: center; gap: 22px; opacity: .16; transform: rotate(-8deg); }
.download-signal i { display: block; width: 1px; height: 36%; background: var(--brass); box-shadow: 0 0 20px var(--orange); animation: wave 2s ease-in-out infinite; }
.download-signal i:nth-child(2) { height: 70%; animation-delay: -.25s; }
.download-signal i:nth-child(3) { height: 100%; animation-delay: -.5s; }
.download-signal i:nth-child(4) { height: 62%; animation-delay: -.75s; }
.download-signal i:nth-child(5) { height: 28%; animation-delay: -1s; }

.footer { padding: 84px 0 92px; display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 36px; align-items: end; }
.footer-brand { gap: 14px; }
.footer-brand div { display: flex; flex-direction: column; }
.footer-brand b { font-size: 26px; font-weight: 500; line-height: 1.1; }
.footer-brand span { color: var(--muted); font: 11px/1.5 var(--ui); }
.footer > p { margin: 0; color: var(--muted); font-size: 14px; font-style: italic; }
.footer nav { justify-self: end; display: flex; gap: 10px; color: var(--muted); font: 12px/1 var(--ui); }
.footer nav a:hover { color: #9a4b27; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@keyframes orbit-turn { to { transform: translate(-50%,-50%) rotate(348deg); } }
@keyframes orbit-turn-back { to { transform: translate(-50%,-50%) rotate(-372deg); } }
@keyframes pulse-dot { 0% { box-shadow: 0 0 0 0 rgba(255,106,42,.32); } 70%,100% { box-shadow: 0 0 0 12px rgba(255,106,42,0); } }
@keyframes globe-pulse { 0% { transform: scale(.45); opacity: .9; } 75%,100% { transform: scale(1.55); opacity: 0; } }
@keyframes globe-search { from { transform: rotate(-.6deg) scale(.995); } to { transform: rotate(.6deg) scale(1.005); } }
@keyframes wave { 0%,100% { transform: scaleY(.45); opacity: .45; } 50% { transform: scaleY(1); opacity: 1; } }

@media (max-width: 980px) {
    .hero { grid-template-columns: minmax(0,1fr) minmax(360px,.75fr); gap: 38px; }
    .signal-note { display: none; }
    .receiver-display { grid-template-columns: 1fr; }
    .frequency { justify-content: flex-start; }
    .roaming-panel, .system-panel { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 880px) {
    .site-header { grid-template-columns: 1fr auto; }
    .nav-links { display: none; }
    .hero { grid-template-columns: 1fr; padding-top: 150px; }
    .hero-copy { max-width: 760px; }
    .hero-visual { min-height: 730px; width: min(520px,100%); margin: 0 auto; }
    .section-heading { grid-template-columns: 1fr; gap: 22px; }
    .section-heading > p:last-child { max-width: 690px; }
    .receiver { min-height: auto; }
    .receiver-display { margin-top: 55px; }
    .receiver-controls { margin-top: 52px; }
    .roaming-panel, .system-panel { grid-template-columns: 1fr; }
    .roaming-copy, .system-copy { max-width: 720px; }
    .globe-stage, .system-card { width: min(520px,100%); justify-self: end; }
    .footer { grid-template-columns: 1fr 1fr; }
    .footer nav { grid-column: 2; }
}

@media (max-width: 600px) {
    .receiver { padding: 28px 22px; border-radius: 28px; }
    .receiver-display { gap: 22px; }
    .frequency strong { font-size: clamp(54px,18vw,82px); }
    .receiver-controls { grid-template-columns: 56px 1fr 56px; gap: 16px; }
    .receiver-key { width: 54px; height: 54px; font-size: 18px; }
    .receiver-key span { display: none; }
    .dial-face { width: 140px; height: 140px; }
    .feature-rows article { grid-template-columns: 1fr; gap: 16px; }
}

@media (max-width: 480px) {
    main, .footer { width: min(100% - 32px,1180px); }
    .site-header { width: calc(100% - 20px); top: 10px; height: 58px; }
    .brand img { width: 34px; height: 34px; }
    .nav-download { padding: 8px 13px; }
    .hero { padding: 124px 0 74px; gap: 48px; }
    .hero h1 { font-size: clamp(54px,15.5vw,74px); }
    .hero-lede { font-size: 17px; }
    .hero-actions { flex-direction: column; align-items: flex-start; }
    .button { min-width: 0; }
    .hero-facts { width: 100%; grid-template-columns: repeat(3,1fr); gap: 10px; }
    .hero-facts b { font-size: 14px; }
    .hero-facts span { font-size: 10px; }
    .hero-visual { min-height: 660px; }
    .visual-caption { top: 0; }
    .visual-caption span:last-child { display: none; }
    .phone-frame { top: 35px; width: min(308px,calc(100vw - 48px)); border-radius: 44px; }
    .phone-frame img, .phone-frame::after { border-radius: 37px; }
    .phone-speaker { top: 14px; }
    .signal-orbit { top: 300px; }
    .orbit-a { width: 390px; height: 220px; }
    .orbit-b { width: 350px; height: 430px; }
    .statement { padding: 80px 0 84px; }
    .section { padding: 82px 0; }
    .section-heading h2, .roaming-copy h2, .system-copy h2, .download h2 { font-size: clamp(40px,12vw,58px); }
    .section-heading > p:last-child, .roaming-copy > p, .system-copy > p { font-size: 16px; }
    .receiver { margin-top: 46px; }
    .receiver-topline span:first-child { display: none; }
    .receiver-topline { justify-content: flex-end; }
    .station-copy h3 { font-size: 34px; }
    .receiver-scale { margin-top: 38px; }
    .dial-face { width: 126px; height: 126px; }
    .roaming-section, .system-section { padding: 20px 0; }
    .roaming-panel, .system-panel { min-height: auto; padding: 40px 23px; border-radius: 28px; gap: 44px; }
    .globe-stage { width: 118%; margin-left: -9%; justify-self: center; }
    .globe-readout { width: 84%; }
    .system-card { padding: 24px; border-radius: 24px; }
    .feature-rows article { padding: 28px 0; }
    .faq summary { font-size: 17px; }
    .download { min-height: auto; grid-template-columns: 1fr; padding: 42px 24px 28px; border-radius: 28px; }
    .download-button { min-width: 0; width: 100%; }
    .download-signal { right: -90px; }
    .footer { grid-template-columns: 1fr; padding: 64px 0; }
    .footer nav { grid-column: 1; justify-self: start; }
}

@media (max-width: 340px) {
    .brand span { display: none; }
    .hero-facts { grid-template-columns: 1fr 1fr; }
    .hero-visual { min-height: 620px; }
    .phone-frame { width: 286px; }
    .receiver-controls { grid-template-columns: 44px 1fr 44px; }
    .receiver-key { width: 44px; height: 44px; }
    .dial-face { width: 116px; height: 116px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .reveal { opacity: 1; transform: none; }
}