:root {
  --ink: #22160f;
  --ink-soft: #5e4a3c;
  --ink-faint: #8f7a69;
  --paper: #f7f1e8;
  --paper-deep: #efe4d5;
  --card: rgba(255, 252, 247, 0.88);
  --card-solid: #fffdf9;
  --line: rgba(72, 45, 28, 0.14);
  --line-strong: rgba(72, 45, 28, 0.24);
  --accent: #b95c2d;
  --accent-bright: #d6763e;
  --accent-soft: #f2d7c1;
  --green: #2f7758;
  --shadow: 0 28px 80px rgba(70, 39, 18, 0.13);
  --radius-xl: 32px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max-width: 1240px;
  font-family: "Avenir Next", "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 14% 6%, rgba(255, 255, 255, 0.94), transparent 28%),
    linear-gradient(180deg, #faf6ef 0%, #f7f1e8 42%, #f3eadf 100%);
}
a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }
img { max-width: 100%; }
::selection { background: var(--accent-soft); color: var(--ink); }

.page-glow {
  position: absolute;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  filter: blur(8px);
  pointer-events: none;
  opacity: 0.65;
}
.page-glow--one { top: 160px; right: -260px; background: radial-gradient(circle, rgba(207, 105, 52, 0.18), transparent 68%); }
.page-glow--two { top: 900px; left: -340px; background: radial-gradient(circle, rgba(137, 91, 52, 0.12), transparent 68%); }

.site-header {
  position: relative;
  z-index: 10;
  width: min(calc(100% - 48px), var(--max-width));
  margin: 0 auto;
  min-height: 92px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -0.02em;
}
.brand img { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 8px 20px rgba(95, 53, 22, 0.16); }
.brand span { font-size: 17px; }
.site-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.site-nav a { text-decoration: none; color: var(--ink-soft); font-size: 14px; font-weight: 650; transition: color 160ms ease; }
.site-nav a:hover { color: var(--accent); }
.version-pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  background: rgba(255, 255, 255, 0.45);
  color: var(--ink-faint);
  font-size: 12px;
  font-weight: 650;
}

.hero {
  position: relative;
  width: min(calc(100% - 48px), var(--max-width));
  margin: 44px auto 0;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(440px, 0.98fr);
  gap: 60px;
  align-items: center;
  min-height: 680px;
}
.hero-copy { position: relative; z-index: 2; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.eyebrow span { width: 24px; height: 2px; border-radius: 2px; background: var(--accent); }
h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 24px;
  font-size: clamp(50px, 5.8vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.062em;
  font-weight: 780;
}
.hero-description { max-width: 560px; margin-bottom: 30px; color: var(--ink-soft); font-size: 17px; line-height: 1.75; }

.platform-picker { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 14px; }
.platform-card {
  position: relative;
  display: grid;
  grid-template-columns: 36px 1fr 20px;
  align-items: center;
  gap: 11px;
  min-height: 78px;
  padding: 14px 14px;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 253, 249, 0.62);
  cursor: pointer;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}
.platform-card:hover { transform: translateY(-2px); border-color: rgba(185, 92, 45, 0.35); background: rgba(255, 253, 249, 0.92); }
.platform-card.is-selected { border-color: var(--accent); background: var(--card-solid); box-shadow: 0 0 0 3px rgba(185, 92, 45, 0.12), 0 12px 28px rgba(112, 63, 29, 0.08); }
.platform-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  font-size: 15px;
  color: #fff;
  background: #29211c;
}
.platform-icon--apple { background: linear-gradient(145deg, #3c3632, #151210); }
.platform-icon--windows { background: linear-gradient(145deg, #55a9ed, #1769c2); font-weight: 900; }
.platform-copy { display: grid; gap: 3px; }
.platform-copy strong { font-size: 15px; letter-spacing: -0.02em; }
.platform-copy span { color: var(--ink-faint); font-size: 12px; }
.platform-check { display: grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; color: transparent; background: transparent; font-size: 12px; font-weight: 900; }
.platform-card.is-selected .platform-check { color: #fff; background: var(--accent); }

.download-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 253, 249, 0.86);
  box-shadow: 0 16px 40px rgba(85, 48, 23, 0.08);
}
.download-meta { display: grid; gap: 3px; min-width: 0; }
.download-label { color: var(--ink-faint); font-size: 11px; font-weight: 750; letter-spacing: 0.08em; text-transform: uppercase; }
.download-meta strong { font-size: 15px; }
.download-meta > span:last-child { overflow: hidden; color: var(--ink-faint); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.primary-button {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-width: 168px;
  padding: 13px 18px;
  border-radius: 13px;
  background: var(--ink);
  color: #fff9f1;
  text-decoration: none;
  font-size: 14px;
  font-weight: 750;
  box-shadow: 0 14px 28px rgba(31, 20, 12, 0.18);
  transition: background 160ms ease, transform 160ms ease;
}
.primary-button:hover { transform: translateY(-1px); background: var(--accent); }
.primary-button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.release-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; margin-top: 12px; color: var(--ink-faint); font-size: 12px; }
.release-meta b { color: var(--ink-soft); }
.dot { width: 3px; height: 3px; border-radius: 50%; background: rgba(80, 53, 36, 0.3); }
.sha-line { margin: 8px 0 0; color: var(--ink-faint); font-family: "SFMono-Regular", Consolas, monospace; font-size: 10px; word-break: break-all; }

.hero-visual { position: relative; z-index: 1; min-height: 560px; display: grid; place-items: center; }
.orbit { position: absolute; border: 1px solid rgba(166, 93, 48, 0.13); border-radius: 50%; }
.orbit--a { width: 560px; height: 560px; }
.orbit--b { width: 450px; height: 450px; border-style: dashed; opacity: 0.7; }
.app-window {
  position: relative;
  z-index: 2;
  width: min(100%, 560px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  overflow: hidden;
  background: #171513;
  box-shadow: 0 46px 90px rgba(45, 24, 10, 0.3), 0 0 0 1px rgba(34, 21, 12, 0.2);
  transform: rotate(-1.2deg);
}
.window-titlebar { height: 42px; padding: 0 16px; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); color: rgba(255, 248, 241, 0.66); font-size: 11px; }
.traffic-lights { display: flex; gap: 6px; }
.traffic-lights i { width: 8px; height: 8px; border-radius: 50%; background: #48423e; }
.traffic-lights i:first-child { background: #d36a55; }
.traffic-lights i:nth-child(2) { background: #d6ad51; }
.traffic-lights i:nth-child(3) { background: #5b9f69; }
.window-titlebar > span:nth-child(2) { margin-left: 6px; }
.window-status { margin-left: auto; padding: 3px 8px; border: 1px solid rgba(67, 156, 111, 0.22); border-radius: 999px; color: #6dc294; background: rgba(47, 119, 88, 0.12); }
.window-body { display: grid; grid-template-columns: 142px minmax(0, 1fr); min-height: 430px; }
.window-sidebar { display: flex; flex-direction: column; gap: 9px; padding: 15px 11px; border-right: 1px solid rgba(255, 255, 255, 0.07); background: #1b1816; }
.mini-brand { display: flex; align-items: center; gap: 8px; margin-bottom: 15px; color: #f8eee5; font-size: 11px; font-weight: 700; }
.mini-brand img { width: 25px; height: 25px; border-radius: 7px; }
.sidebar-item { display: flex; align-items: center; gap: 9px; padding: 8px 9px; border-radius: 8px; color: #8f8781; font-size: 10px; }
.sidebar-item i { width: 11px; height: 11px; border: 1px solid currentColor; border-radius: 3px; opacity: 0.8; }
.sidebar-item--active { color: #f4e8db; background: rgba(255, 255, 255, 0.07); }
.sidebar-spacer { flex: 1; }
.sidebar-user { display: flex; align-items: center; gap: 7px; padding-top: 11px; border-top: 1px solid rgba(255, 255, 255, 0.07); color: #a49b94; font-size: 9px; }
.avatar { width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; background: #6c4b38; color: #fff; font-size: 9px; }
.chat-panel { display: flex; flex-direction: column; padding: 25px 20px 18px; background: radial-gradient(circle at 65% 10%, rgba(116, 69, 39, 0.14), transparent 38%), #1e1b19; }
.chat-heading { display: flex; gap: 10px; margin-bottom: 28px; color: #f6eee6; }
.chat-dot { flex: none; width: 8px; height: 8px; margin-top: 5px; border-radius: 50%; background: #d47a45; box-shadow: 0 0 0 5px rgba(212, 122, 69, 0.1); }
.chat-heading div { display: grid; gap: 4px; }
.chat-heading strong { font-size: 14px; font-weight: 700; }
.chat-heading span { color: #8e8580; font-size: 9px; }
.message { width: fit-content; max-width: 86%; margin-bottom: 12px; padding: 10px 12px; border-radius: 12px; font-size: 10px; line-height: 1.55; }
.message--user { align-self: flex-end; margin-left: auto; color: #f8eee5; background: #3a2b22; border-bottom-right-radius: 4px; }
.message--assistant { display: flex; gap: 8px; color: #c8bfb9; background: rgba(255, 255, 255, 0.045); border-bottom-left-radius: 4px; }
.assistant-mark { flex: none; width: 20px; height: 20px; display: grid; place-items: center; border-radius: 6px; background: #6c422b; color: #fff; font-size: 7px; font-weight: 800; }
.message--assistant p { margin-bottom: 8px; }
.typing { display: flex; gap: 3px; }
.typing i, .mini-response i { width: 4px; height: 4px; border-radius: 50%; background: #877b73; animation: blink 1.3s infinite ease-in-out; }
.typing i:nth-child(2), .mini-response i:nth-child(2) { animation-delay: 0.18s; }
.typing i:nth-child(3), .mini-response i:nth-child(3) { animation-delay: 0.36s; }
@keyframes blink { 0%, 70%, 100% { opacity: 0.35; transform: translateY(0); } 35% { opacity: 1; transform: translateY(-2px); } }
.composer { margin-top: auto; padding: 12px; border: 1px solid rgba(255, 255, 255, 0.09); border-radius: 14px; background: #25211e; color: #827973; font-size: 9px; }
.composer-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; }
.model-chip { padding: 4px 8px; border-radius: 6px; color: #bdb0a6; background: rgba(255, 255, 255, 0.05); font-size: 8px; }
.send-button { width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; background: #efe4d8; color: #1e1b19; font-size: 12px; font-weight: 800; }
.floating-card { position: absolute; z-index: 3; display: grid; gap: 3px; padding: 14px 16px; border: 1px solid rgba(255, 255, 255, 0.7); border-radius: 16px; background: rgba(255, 252, 247, 0.9); box-shadow: 0 20px 50px rgba(68, 37, 16, 0.16); backdrop-filter: blur(14px); }
.floating-card--balance { right: -22px; bottom: 88px; min-width: 122px; transform: rotate(2deg); }
.floating-card--balance span, .floating-card--balance small { color: var(--ink-faint); font-size: 10px; }
.floating-card--balance strong { font-size: 25px; letter-spacing: -0.04em; }
.floating-card--key { top: 44px; left: -26px; grid-template-columns: 9px 1fr; align-items: center; column-gap: 9px; transform: rotate(-2deg); }
.floating-card--key div { display: grid; gap: 2px; }
.floating-card--key strong { font-size: 11px; }
.floating-card--key small { color: var(--green); font-size: 9px; }
.key-dot { width: 8px; height: 8px; border-radius: 50%; background: #4ca474; box-shadow: 0 0 0 4px rgba(76, 164, 116, 0.12); }
.key-dot--muted { background: #b9aea6; box-shadow: none; }

.feature-strip {
  width: min(calc(100% - 48px), var(--max-width));
  margin: 42px auto 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.feature-strip-item { display: flex; gap: 18px; padding: 28px 30px; }
.feature-strip-item + .feature-strip-item { border-left: 1px solid var(--line); }
.feature-number { color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: 0.12em; }
.feature-strip-item div { display: grid; gap: 5px; }
.feature-strip-item strong { font-size: 14px; }
.feature-strip-item span:last-child { color: var(--ink-faint); font-size: 12px; }

.tutorial, .faq { position: relative; width: min(calc(100% - 48px), var(--max-width)); margin: 0 auto; padding-top: 130px; }
.section-heading { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 70px; align-items: end; margin-bottom: 34px; }
.section-heading h2 { margin-bottom: 0; font-size: clamp(38px, 4.8vw, 62px); line-height: 1.04; letter-spacing: -0.055em; }
.section-description { margin: 0 0 8px; color: var(--ink-soft); font-size: 15px; line-height: 1.8; }
.section-heading--compact { grid-template-columns: 1fr; }
.tutorial-note { display: flex; gap: 18px; align-items: center; margin-bottom: 22px; padding: 18px 22px; border: 1px solid rgba(185, 92, 45, 0.16); border-radius: 16px; background: rgba(255, 248, 240, 0.7); color: var(--ink-soft); font-size: 13px; line-height: 1.7; }
.tutorial-note strong { flex: none; color: var(--accent); }
.tutorial-grid { display: grid; gap: 18px; }
.tutorial-step {
  position: relative;
  display: grid;
  grid-template-columns: 72px minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 34px;
  align-items: center;
  min-height: 340px;
  padding: 38px 42px 38px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--card);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.85) inset;
}
.tutorial-step--reverse { grid-template-columns: 72px minmax(320px, 0.95fr) minmax(0, 1.05fr); }
.tutorial-step--reverse .step-copy { order: 3; }
.tutorial-step--reverse .step-visual { order: 2; }
.step-index { align-self: start; width: 54px; height: 54px; display: grid; place-items: center; border: 1px solid var(--line-strong); border-radius: 50%; color: var(--accent); font-size: 13px; font-weight: 800; }
.step-copy { max-width: 560px; }
.step-kicker { margin-bottom: 10px; color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase; }
.step-copy h3 { margin-bottom: 14px; font-size: clamp(26px, 2.7vw, 38px); letter-spacing: -0.045em; }
.step-copy > p:not(.step-kicker):not(.inline-tip) { margin-bottom: 18px; color: var(--ink-soft); font-size: 14px; line-height: 1.8; }
.check-list { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 22px; color: var(--ink-soft); font-size: 13px; line-height: 1.6; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 800; }
.inline-tip { margin: 16px 0 0; padding: 10px 12px; border-left: 2px solid var(--accent); background: rgba(185, 92, 45, 0.06); color: var(--ink-soft); font-size: 12px; }
code { padding: 2px 5px; border-radius: 4px; background: rgba(77, 45, 24, 0.08); font-family: "SFMono-Regular", Consolas, monospace; font-size: 0.92em; }
.step-visual { position: relative; min-height: 250px; display: grid; place-items: center; border-radius: 22px; background: linear-gradient(145deg, #eee1d2, #f8f2ea); overflow: hidden; }
.step-visual::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(96, 61, 37, 0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(96, 61, 37, 0.045) 1px, transparent 1px); background-size: 26px 26px; mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent); }

.install-card { position: relative; z-index: 1; display: flex; align-items: center; gap: 12px; width: 86%; padding: 18px; border: 1px solid rgba(80, 50, 30, 0.1); border-radius: 16px; background: rgba(255, 253, 249, 0.9); box-shadow: 0 18px 36px rgba(70, 39, 18, 0.11); }
.install-card img { width: 52px; height: 52px; border-radius: 13px; }
.install-card div:not(.applications-folder) { display: grid; gap: 4px; min-width: 0; }
.install-card strong { font-size: 12px; }
.install-card span { color: var(--ink-faint); font-size: 10px; }
.install-arrow { margin-left: auto; color: var(--accent); font-size: 22px; }
.applications-folder { width: 47px; height: 47px; display: grid; place-items: center; border-radius: 11px; background: linear-gradient(145deg, #7bb4ec, #367ed2); color: #fff; font-size: 8px; text-align: center; }
.warning-chip { position: absolute; z-index: 2; bottom: 24px; display: flex; align-items: center; gap: 7px; padding: 8px 11px; border: 1px solid rgba(185, 92, 45, 0.15); border-radius: 999px; background: rgba(255, 248, 241, 0.95); color: var(--ink-soft); font-size: 10px; box-shadow: 0 8px 24px rgba(70, 39, 18, 0.09); }
.warning-chip span { width: 16px; height: 16px; display: grid; place-items: center; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 800; }
.split-tip { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.split-tip div { display: grid; gap: 5px; padding: 13px; border: 1px solid var(--line); border-radius: 12px; background: rgba(255, 253, 249, 0.56); }
.split-tip strong { font-size: 12px; }
.split-tip span { color: var(--ink-faint); font-size: 11px; line-height: 1.6; }

.login-card { position: relative; z-index: 1; width: 230px; display: grid; justify-items: center; gap: 9px; padding: 24px 22px; border: 1px solid rgba(80, 50, 30, 0.1); border-radius: 20px; background: rgba(255, 253, 249, 0.94); box-shadow: 0 22px 42px rgba(70, 39, 18, 0.13); }
.login-card img { width: 54px; height: 54px; margin-bottom: 3px; border-radius: 14px; }
.login-card strong { margin-bottom: 5px; font-size: 13px; }
.fake-input { width: 100%; padding: 9px 10px; border: 1px solid rgba(80, 50, 30, 0.13); border-radius: 8px; color: #b4a69b; font-size: 9px; }
.fake-button { width: 100%; margin-top: 3px; padding: 9px; border-radius: 8px; background: var(--ink); color: #fff; font-size: 9px; text-align: center; font-weight: 700; }
.login-card > span { margin-top: 4px; color: var(--ink-faint); font-size: 8px; }

.key-panel { position: relative; z-index: 1; width: 82%; display: grid; gap: 9px; padding: 18px; border: 1px solid rgba(80, 50, 30, 0.1); border-radius: 18px; background: rgba(255, 253, 249, 0.95); box-shadow: 0 22px 42px rgba(70, 39, 18, 0.1); }
.key-panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 3px; }
.key-panel-head strong { font-size: 12px; }
.key-panel-head span { color: var(--accent); font-size: 9px; font-weight: 700; }
.key-row { display: grid; grid-template-columns: 8px 1fr auto; align-items: center; gap: 9px; padding: 10px; border: 1px solid transparent; border-radius: 10px; background: rgba(245, 238, 230, 0.65); }
.key-row--active { border-color: rgba(76, 164, 116, 0.17); background: rgba(237, 247, 241, 0.8); }
.key-row div { display: grid; gap: 2px; }
.key-row strong { font-size: 9px; }
.key-row small { color: var(--ink-faint); font-size: 8px; }
.key-row > span:last-child { color: var(--green); font-size: 8px; }
.model-row { display: flex; justify-content: space-between; align-items: center; margin-top: 3px; padding-top: 10px; border-top: 1px solid var(--line); color: var(--ink-faint); font-size: 8px; }
.model-row strong { color: var(--ink); font-size: 9px; }

.usage-card { position: relative; z-index: 1; width: 84%; display: grid; gap: 12px; padding: 18px; border: 1px solid rgba(80, 50, 30, 0.1); border-radius: 18px; background: rgba(255, 253, 249, 0.95); box-shadow: 0 22px 42px rgba(70, 39, 18, 0.1); }
.usage-head { display: flex; justify-content: space-between; color: var(--ink-faint); font-size: 9px; }
.usage-head span:first-child { color: var(--ink); font-weight: 700; }
.balance-block { display: grid; gap: 2px; padding: 12px; border-radius: 12px; background: linear-gradient(135deg, #2b211b, #4d3020); color: #fff; }
.balance-block small { color: rgba(255, 255, 255, 0.55); font-size: 8px; }
.balance-block strong { font-size: 25px; letter-spacing: -0.04em; }
.balance-block span { color: rgba(255, 255, 255, 0.46); font-size: 8px; }
.usage-tabs { display: flex; gap: 4px; padding: 3px; border-radius: 8px; background: rgba(80, 50, 30, 0.06); font-size: 8px; }
.usage-tabs span { padding: 6px 8px; border-radius: 6px; color: var(--ink-faint); }
.usage-tabs .active { color: var(--ink); background: #fff; box-shadow: 0 2px 8px rgba(70, 39, 18, 0.08); }
.usage-empty { display: flex; align-items: center; gap: 4px; height: 30px; color: var(--ink-faint); font-size: 8px; }
.usage-empty i { width: 32px; height: 4px; border-radius: 2px; background: rgba(80, 50, 30, 0.09); }
.recharge-button { padding: 8px; border-radius: 8px; background: var(--accent); color: #fff; font-size: 8px; text-align: center; font-weight: 700; }

.mini-chat { position: relative; z-index: 1; width: 82%; padding: 13px; border-radius: 15px; background: #1e1b19; box-shadow: 0 22px 42px rgba(70, 39, 18, 0.18); }
.mini-chat-top { display: flex; align-items: center; gap: 7px; padding-bottom: 10px; border-bottom: 1px solid rgba(255, 255, 255, 0.07); color: #efe5dc; font-size: 9px; }
.mini-logo { width: 22px; height: 22px; overflow: hidden; border-radius: 6px; }
.mini-model { margin-left: auto; padding: 3px 6px; border-radius: 5px; background: rgba(255, 255, 255, 0.06); color: #a79d95; font-size: 7px; }
.mini-bubble { width: fit-content; margin: 12px 0 10px auto; padding: 8px 10px; border-radius: 9px 9px 2px 9px; background: #3a2b22; color: #f3e8de; font-size: 8px; }
.mini-response { display: flex; gap: 7px; padding: 9px; border-radius: 9px; background: rgba(255, 255, 255, 0.04); color: #b9afa8; font-size: 8px; }
.mini-avatar { flex: none; width: 18px; height: 18px; display: grid; place-items: center; border-radius: 5px; background: #6c422b; color: #fff; font-size: 6px; }
.mini-response div { display: flex; flex-wrap: wrap; align-items: center; gap: 3px; }
.mini-response span { flex-basis: 100%; margin-top: 5px; color: #7e756f; }
.mini-composer { display: flex; justify-content: space-between; align-items: center; margin-top: 11px; padding: 8px 9px; border: 1px solid rgba(255, 255, 255, 0.07); border-radius: 8px; color: #766e69; font-size: 8px; }
.mini-composer b { width: 18px; height: 18px; display: grid; place-items: center; border-radius: 50%; background: #efe4d8; color: #1e1b19; }
.callout-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }
.callout-row div { display: grid; gap: 5px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; }
.callout-row strong { font-size: 11px; }
.callout-row span { color: var(--ink-faint); font-size: 10px; line-height: 1.6; }

.faq { padding-bottom: 120px; }
.faq-list { border-top: 1px solid var(--line-strong); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 23px 48px 23px 0; cursor: pointer; font-size: 15px; font-weight: 700; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 8px; top: 50%; transform: translateY(-50%); color: var(--accent); font-size: 20px; font-weight: 400; transition: transform 160ms ease; }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list details p { max-width: 900px; margin: -4px 0 24px; color: var(--ink-soft); font-size: 13px; line-height: 1.8; }

.site-footer { width: min(calc(100% - 48px), var(--max-width)); margin: 0 auto; padding: 32px 0 44px; display: flex; align-items: center; gap: 28px; border-top: 1px solid var(--line); color: var(--ink-faint); font-size: 12px; }
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-brand img { width: 30px; height: 30px; border-radius: 8px; }
.footer-brand div { display: grid; gap: 2px; }
.footer-brand strong { color: var(--ink); font-size: 13px; }
.site-footer p { margin: 0 auto; }
.site-footer a { color: var(--accent); text-decoration: none; font-weight: 700; }

@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; min-height: 0; margin-top: 25px; }
  .hero-copy { max-width: 780px; }
  .hero-visual { min-height: 530px; }
  .app-window { width: min(100%, 600px); }
  .section-heading { gap: 35px; }
  .tutorial-step, .tutorial-step--reverse { grid-template-columns: 62px minmax(0, 1fr); gap: 22px; }
  .step-visual { grid-column: 2; min-height: 300px; }
  .tutorial-step--reverse .step-copy, .tutorial-step--reverse .step-visual { order: initial; }
  .tutorial-step--reverse .step-copy { grid-column: 2; }
  .tutorial-step--reverse .step-visual { grid-column: 2; grid-row: 2; }
}

@media (max-width: 760px) {
  .page-glow { display: none; }
  .site-header { width: min(calc(100% - 30px), var(--max-width)); min-height: 76px; }
  .site-nav { display: none; }
  .version-pill { margin-left: auto; }
  .hero, .feature-strip, .tutorial, .faq, .site-footer { width: min(calc(100% - 30px), var(--max-width)); }
  .hero { margin-top: 34px; }
  h1 { font-size: clamp(44px, 14vw, 64px); }
  .hero-description { font-size: 15px; }
  .platform-card { min-height: 72px; padding: 12px; grid-template-columns: 32px 1fr 18px; }
  .platform-icon { width: 32px; height: 32px; }
  .download-bar { align-items: stretch; flex-direction: column; }
  .primary-button { width: 100%; }
  .hero-visual { min-height: 460px; transform: scale(0.96); }
  .orbit--a { width: 430px; height: 430px; }
  .orbit--b { width: 350px; height: 350px; }
  .floating-card--balance { right: 0; bottom: 12px; }
  .floating-card--key { top: 2px; left: 0; }
  .window-body { grid-template-columns: 105px minmax(0, 1fr); min-height: 350px; }
  .feature-strip { grid-template-columns: 1fr; margin-top: 60px; }
  .feature-strip-item + .feature-strip-item { border-left: 0; border-top: 1px solid var(--line); }
  .section-heading { grid-template-columns: 1fr; gap: 14px; }
  .section-heading h2 { font-size: clamp(34px, 10vw, 48px); }
  .tutorial, .faq { padding-top: 90px; }
  .tutorial-note { align-items: flex-start; flex-direction: column; gap: 5px; }
  .tutorial-step, .tutorial-step--reverse { grid-template-columns: 1fr; padding: 24px 18px; border-radius: 24px; }
  .step-index { width: 44px; height: 44px; }
  .step-visual, .tutorial-step--reverse .step-visual { grid-column: 1; grid-row: auto; min-height: 280px; }
  .tutorial-step--reverse .step-copy { grid-column: 1; }
  .split-tip, .callout-row { grid-template-columns: 1fr; }
  .site-footer { flex-wrap: wrap; gap: 16px; }
  .site-footer p { order: 3; flex-basis: 100%; }
}

@media (max-width: 480px) {
  .platform-picker { grid-template-columns: 1fr; }
  .hero-visual { min-height: 400px; transform: scale(0.9); margin: -10px -20px; }
  .window-body { grid-template-columns: 88px minmax(0, 1fr); }
  .window-titlebar { padding: 0 11px; }
  .chat-panel { padding: 18px 13px 13px; }
  .window-sidebar { padding: 11px 7px; }
  .mini-brand span, .sidebar-item span, .sidebar-user span:last-child { display: none; }
  .sidebar-item { justify-content: center; }
  .step-copy h3 { font-size: 28px; }
  .install-card { width: 95%; gap: 8px; padding: 13px; }
  .install-card img { width: 40px; height: 40px; }
  .applications-folder { width: 39px; height: 39px; }
  .key-panel, .usage-card, .mini-chat { width: 94%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}