/* Immerse Jam 官网 · 深色主题，与应用内深色界面一致 */
:root {
  --bg: #131014;
  --bg-soft: #1a161c;
  --card: #211b23;
  --card-2: #2a222c;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #f3eef1;
  --muted: #a99aa3;
  --quiet: #7e7079;
  --accent: #f2536e;
  --accent-hover: #ff6b84;
  --accent-soft: rgba(242, 83, 110, 0.14);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --radius: 14px;
  --font: Inter, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
body.dialog-open {
  overflow: hidden;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--accent-hover);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0 0 0.5em;
  letter-spacing: 0.01em;
}
h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.05rem);
}
h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
}
h3 {
  font-size: 1.12rem;
}
p {
  margin: 0 0 1em;
  color: var(--muted);
}
.wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}
.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  font-weight: 600;
}
.tiny-note {
  font-size: 0.85rem;
  color: var(--quiet);
  line-height: 1.7;
}

/* 可操作 PC 试用。工作台通过独立页面加载，不影响官网主题。 */
.tryout-section {
  padding: 80px 0;
  border-block: 1px solid var(--line);
  background: var(--bg-soft);
}
.tryout-frame {
  position: relative;
  width: min(calc(100vw - 48px), 1360px);
  left: 50%;
  transform: translateX(-50%);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  overflow: hidden;
  background: #111114;
  box-shadow: var(--shadow);
}
.tryout-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  padding: 12px 18px;
  background: #211b23;
  color: var(--muted);
  font-size: 11px;
}
.tryout-toolbar > span {
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 1px;
}
.tryout-toolbar i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.tryout-toolbar > div {
  display: flex;
  align-items: center;
  gap: 16px;
}
.tryout-toolbar button {
  padding: 0;
  border: 0;
  background: transparent;
  color: #e5abb9;
  cursor: pointer;
  font: inherit;
}
.tryout-toolbar button[hidden],
.tryout-launch[hidden] {
  display: none;
}
.tryout-launch {
  position: relative;
  min-height: 360px;
  display: grid;
  place-items: center;
  text-align: center;
  overflow: hidden;
}
.tryout-launch > img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  filter: blur(2px);
}
.tryout-launch > div {
  position: relative;
  padding: 55px 20px;
}
.tryout-launch h3 {
  margin-top: 20px;
  font-size: 30px;
}
.tryout-launch p {
  font-size: 13px;
}
.tryout-launch .button {
  font: inherit;
  cursor: pointer;
}
.tryout-launch small {
  display: block;
  margin-top: 14px;
  color: var(--muted);
  font-size: 11px;
}
.tryout-pill {
  padding: 6px 12px;
  background: #f2536e14;
  border: 1px solid #f2536e40;
  border-radius: 20px;
  color: #efb2bf;
  font-size: 11px;
}
#tryout-mount {
  overflow: auto;
}
#tryout-mount iframe {
  width: 100%;
  min-width: 1060px;
  height: 780px;
  display: block;
  border: 0;
}
.tryout-note {
  margin: 18px 0 0;
  max-width: 1000px;
  font-size: 12px;
  line-height: 1.9;
}
.tryout-frame:fullscreen {
  width: 100%;
  left: 0;
  transform: none;
  border-radius: 0;
  display: flex;
  flex-direction: column;
}
.tryout-frame:fullscreen #tryout-mount {
  flex: 1;
}
.tryout-frame:fullscreen iframe {
  height: calc(100dvh - 43px);
}
@media (max-width: 700px) {
  .tryout-section {
    padding-block: 45px;
  }
  .tryout-toolbar {
    flex-wrap: wrap;
    font-size: 10px;
  }
  .tryout-launch h3 {
    font-size: 25px;
  }
  .tryout-note {
    font-size: 11px;
  }
}

/* 按钮 */
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition:
    background 0.15s ease,
    transform 0.15s ease;
}
.button:hover {
  background: var(--accent-hover);
  text-decoration: none;
  transform: translateY(-1px);
}
.button.small {
  padding: 9px 18px;
  font-size: 0.92rem;
}
.button.ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--text);
}
.button.ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}
.text-link {
  color: var(--text);
  font-weight: 500;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}
.text-link:hover {
  color: var(--accent-hover);
  border-color: var(--accent-hover);
  text-decoration: none;
}

/* 顶栏 */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(19, 16, 20, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 62px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 1.12rem;
  white-space: nowrap;
}
.brand:hover {
  text-decoration: none;
}
.brand img {
  border-radius: 8px;
}
.nav nav {
  display: flex;
  gap: 22px;
  margin-left: 12px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav nav::-webkit-scrollbar {
  display: none;
}
.nav nav a {
  color: var(--muted);
  font-size: 0.95rem;
  white-space: nowrap;
}
.nav nav a:hover {
  color: var(--text);
  text-decoration: none;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.github-link {
  display: inline-flex;
  color: var(--muted);
}
.github-link svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.github-link:hover {
  color: var(--text);
}

.skip-link {
  position: absolute;
  left: -9999px;
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  z-index: 100;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
  padding-top: 84px;
  padding-bottom: 56px;
}
.hero-lead {
  font-size: 1.06rem;
  max-width: 34em;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin: 26px 0 16px;
}
.hero-note {
  font-size: 0.88rem;
  color: var(--quiet);
}
.hero-visual {
  min-width: 0;
}
.screen-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--quiet);
  margin-bottom: 10px;
}
.screen-top i {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 6px;
}

/* 截图按钮 */
.screenshot-button {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
  cursor: zoom-in;
  box-shadow: var(--shadow);
}
.screenshot-button img {
  width: 100%;
}
.zoom-hint {
  position: absolute;
  right: 12px;
  bottom: 12px;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 0.78rem;
  padding: 5px 12px;
  border-radius: 999px;
  opacity: 0;
  transition: opacity 0.15s ease;
}
.screenshot-button:hover .zoom-hint,
.screenshot-button:focus-visible .zoom-hint {
  opacity: 1;
}

/* 卖点条 */
.selling {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  padding-top: 24px;
  padding-bottom: 72px;
}
.selling > div {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 22px 18px;
}
.selling h2 {
  font-size: 1.05rem;
  color: var(--accent-hover);
  margin-bottom: 8px;
}
.selling p {
  font-size: 0.92rem;
  margin: 0;
  line-height: 1.7;
}

/* 分区标题 */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 40px;
}
.section-head > p {
  max-width: 34em;
  margin: 0;
}

/* 分轨试听 */
.stems-section {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 84px 0;
}
.stem-player {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px 20px;
}
.stem-master {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.stem-modes {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
}
.stem-modes button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  padding: 8px 18px;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  transition:
    background 0.15s ease,
    color 0.15s ease;
}
.stem-modes button[aria-pressed='true'] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--text);
}
.stem-list button:disabled,
.stem-list input:disabled {
  opacity: 0.4;
  cursor: default;
}
.stem-play {
  width: 54px;
  height: 54px;
  flex: none;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1.15rem;
  cursor: pointer;
  transition: background 0.15s ease;
}
.stem-play:hover {
  background: var(--accent-hover);
}
.stem-timeline {
  flex: 1;
  min-width: 0;
}
.stem-time {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--quiet);
  font-variant-numeric: tabular-nums;
}
.stem-reset {
  flex: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  cursor: pointer;
}
.stem-reset:hover {
  color: var(--text);
  border-color: var(--muted);
}
.stem-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}
.stem-list li {
  display: grid;
  grid-template-columns: 14px 72px auto minmax(120px, 1fr);
  align-items: center;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}
.stem-list li:last-child {
  border-bottom: none;
}
.stem-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--track-color, var(--accent));
}
.stem-name {
  font-weight: 600;
  font-size: 0.98rem;
}
.stem-buttons {
  display: flex;
  gap: 8px;
}
.stem-buttons button {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.12s ease;
}
.stem-buttons button:hover {
  color: var(--text);
}
.stem-buttons .stem-mute[aria-pressed='true'] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.stem-buttons .stem-solo[aria-pressed='true'] {
  background: #fff;
  border-color: #fff;
  color: #1b1418;
  font-weight: 600;
}
.stem-list li.muted .stem-name,
.stem-list li.muted .stem-dot {
  opacity: 0.38;
}

/* range 滑杆 */
input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: var(--line-strong);
  outline: none;
  cursor: pointer;
}
input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
}
input[type='range']::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
}
.stem-note {
  font-size: 0.82rem;
  color: var(--quiet);
  margin: 16px 0 0;
  line-height: 1.7;
}

/* 功能区 */
.feature {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: center;
  padding: 92px 24px;
}
.feature.alt .feature-copy {
  order: 2;
}
.feature.alt .feature-visual {
  order: 1;
}
.check-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}
.check-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  color: var(--muted);
}
.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* 模型 */
.models-section {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 84px 0;
}
.models-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 32px;
  align-items: start;
}
.model-list article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 14px;
}
.model-list h3 {
  margin-bottom: 6px;
  font-size: 1.02rem;
}
.model-list p {
  margin: 0;
  font-size: 0.93rem;
}

/* 五步导览 */
.guide-section {
  padding: 92px 0;
}
.guide-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
}
.step {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  border-left: 2px solid var(--line);
  color: var(--muted);
  padding: 13px 16px;
  cursor: pointer;
  font-family: inherit;
}
.step:hover {
  color: var(--text);
}
.step.active {
  border-left-color: var(--accent);
  color: var(--text);
  background: var(--accent-soft);
}
.step-num {
  font-size: 0.8rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.step strong {
  display: block;
  font-size: 0.98rem;
}
.step small {
  color: var(--quiet);
  font-size: 0.82rem;
}
.tour-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 8px;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 20px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.92rem;
}
.tour-toggle:hover {
  border-color: var(--accent);
}
.tour-icon {
  color: var(--accent);
}
.tour-note {
  font-size: 0.82rem;
  color: var(--quiet);
}
.guide-frame {
  position: relative;
}
.hotspot {
  position: absolute;
  left: var(--x);
  top: var(--y);
  transform: translate(-50%, -50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 0 0 8px var(--accent-soft);
}
.guide-detail {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  margin-top: 22px;
}
.guide-detail h3 {
  margin: 6px 0 0;
}
.guide-detail p {
  max-width: 40em;
  margin: 0;
}
.step-counter {
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--accent);
}
.guide-tip {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  color: var(--quiet);
  font-size: 0.88rem;
}

/* Android */
.android-section {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 84px 0;
}
.android-shots {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.android-shots figure {
  margin: 0;
}
.android-shots img {
  width: 100%;
  border-radius: var(--radius);
}
.android-shots figcaption {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--quiet);
  text-align: center;
}
.android-creation-shot {
  margin: 24px 0 0;
}
.android-creation-shot img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}
.android-creation-shot figcaption {
  margin: 10px 0 0;
  color: var(--quiet);
  font-size: 0.85rem;
  text-align: center;
}
.android-points {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  margin-top: 40px;
  align-items: start;
}
.android-actions .button {
  margin-bottom: 12px;
}
.android-actions .text-link {
  display: inline-block;
  margin-bottom: 14px;
}

/* 互传 */
.transfer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: center;
  padding: 92px 24px;
}
.transfer-diagram {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
}
.device {
  flex: none;
}
.device-screen {
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 14px;
  position: relative;
}
.desktop-device .device-screen {
  width: 190px;
  height: 128px;
}
.device-stand {
  width: 60px;
  height: 8px;
  background: var(--line-strong);
  margin: 0 auto;
  border-radius: 0 0 6px 6px;
}
.mini-window {
  display: flex;
  gap: 5px;
  margin-bottom: 10px;
}
.mini-window span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line-strong);
}
.mini-window span:first-child {
  background: var(--accent);
}
.mini-tracks {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.mini-tracks i {
  height: 8px;
  border-radius: 3px;
  background: var(--accent-soft);
  border: 1px solid var(--line);
}
.mini-tracks i:nth-child(2) {
  width: 80%;
}
.mini-tracks i:nth-child(3) {
  width: 60%;
}
.mini-tracks i:nth-child(4) {
  width: 72%;
}
.device-label {
  position: absolute;
  left: 14px;
  bottom: 8px;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--quiet);
}
.transfer-path {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
  min-width: 0;
}
.transfer-packet {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: packet 2.4s linear infinite;
}
@keyframes packet {
  0% {
    opacity: 0.2;
    transform: scaleX(0.4);
  }
  50% {
    opacity: 1;
    transform: scaleX(1);
  }
  100% {
    opacity: 0.2;
    transform: scaleX(0.4);
  }
}
.wifi-label,
.file-label {
  font-size: 0.72rem;
  color: var(--quiet);
  letter-spacing: 0.08em;
}
.file-label {
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 2px 8px;
}
.transfer-direction {
  color: var(--accent);
}
.tablet-device .device-screen {
  width: 128px;
  height: 168px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}
.mini-note {
  color: var(--accent);
  font-size: 1.1rem;
}
.mini-wave {
  height: 34px;
  border-radius: 4px;
  background: repeating-linear-gradient(90deg, var(--accent-soft) 0 6px, transparent 6px 12px);
}
.mini-transport {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.72rem;
}
.mini-transport i {
  flex: 1;
  height: 3px;
  background: var(--line-strong);
  border-radius: 3px;
}

/* 边界 */
.honesty-section {
  padding: 92px 0;
}
.honesty-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.honesty-grid article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.honesty-number {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 14px;
}
.honesty-grid h3 {
  font-size: 1.12rem;
}
.honesty-grid p {
  font-size: 0.93rem;
}

/* FAQ */
.faq-section {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 84px 0;
}
.faq-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}
.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}
.faq-list summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  list-style: none;
}
.faq-list summary::-webkit-details-marker {
  display: none;
}
.faq-list summary span {
  color: var(--accent);
  transition: transform 0.15s ease;
}
.faq-list details[open] summary span {
  transform: rotate(45deg);
}
.faq-list details p {
  font-size: 0.94rem;
  margin: 0 0 16px;
  max-width: 46em;
}
.appreciation-code {
  display: block;
  width: min(100%, 400px);
  margin-bottom: 16px;
}
.appreciation-code img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

/* 下载 */
.download {
  padding: 96px 24px;
  text-align: center;
}
.download-lead {
  max-width: 32em;
  margin: 0 auto 36px;
}
.download-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  text-align: left;
}
.download-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  color: var(--text);
  transition:
    border-color 0.15s ease,
    transform 0.15s ease;
}
.download-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  text-decoration: none;
}
.download-card.secondary {
  opacity: 0.82;
}
.download-platform {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  text-transform: uppercase;
}
.download-card strong {
  font-size: 1.18rem;
}
.download-meta {
  font-size: 0.86rem;
  color: var(--quiet);
}
.download-go {
  margin-top: 12px;
  color: var(--accent-hover);
  font-weight: 600;
  font-size: 0.95rem;
}
.download-extra {
  display: flex;
  justify-content: center;
  gap: 26px;
  flex-wrap: wrap;
  margin: 28px 0 40px;
  font-size: 0.92rem;
}
.release-box {
  max-width: 640px;
  margin: 0 auto;
  text-align: left;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 26px;
}
.release-box h3 {
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--quiet);
  text-transform: uppercase;
}
.release-line {
  display: flex;
  gap: 16px;
  align-items: baseline;
  margin-bottom: 8px;
}
.release-line span:first-child {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}
.release-line span:last-child {
  font-size: 0.85rem;
  color: var(--quiet);
}
.release-notes {
  font-size: 0.92rem;
  margin: 0;
  white-space: pre-line;
}

/* 社区 */
.community {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: center;
  padding: 72px 24px 96px;
}
.community-invite ul {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}
.community-invite li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.community-invite li b {
  display: block;
}
.community-invite li span {
  color: var(--muted);
  font-size: 0.93rem;
}

/* 页脚 */
.footer {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding: 30px 24px;
}
.footer p {
  margin: 0;
  flex: 1;
  font-size: 0.88rem;
  color: var(--quiet);
}
.footer p span {
  color: var(--quiet);
}
.footer div {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.88rem;
}

/* 图片弹窗 */
dialog#image-dialog {
  border: none;
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  padding: 0;
  width: min(94vw, 1100px);
  max-height: 92vh;
  box-shadow: var(--shadow);
}
dialog#image-dialog::backdrop {
  background: rgba(0, 0, 0, 0.72);
}
.dialog-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--quiet);
}
.dialog-toolbar button {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--text);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
  font-family: inherit;
}
.dialog-image-wrap {
  max-height: 72vh;
  overflow: auto;
}
.dialog-image-wrap img {
  width: 100%;
}
#image-caption {
  padding: 12px 18px 16px;
  font-size: 0.9rem;
}

.noscript-note {
  position: fixed;
  left: 12px;
  bottom: 12px;
  right: 12px;
  background: var(--card-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 12px 18px;
  font-size: 0.88rem;
  z-index: 60;
}

/* 响应式 */
@media (max-width: 1024px) {
  .hero,
  .feature,
  .transfer,
  .community {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .feature.alt .feature-copy,
  .feature.alt .feature-visual {
    order: unset;
  }
  .selling {
    grid-template-columns: repeat(2, 1fr);
  }
  .models-grid {
    grid-template-columns: 1fr;
  }
  .android-shots {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .android-points {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .guide-layout,
  .faq-layout {
    grid-template-columns: 1fr;
  }
  .guide-detail {
    flex-direction: column;
    gap: 10px;
  }
}
@media (max-width: 720px) {
  .nav nav {
    display: none;
  }
  .hero {
    padding-top: 52px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .selling,
  .download-cards,
  .honesty-grid {
    grid-template-columns: 1fr;
  }
  .stem-list li {
    grid-template-columns: 14px 60px auto;
    grid-template-areas:
      'dot name buttons'
      'vol vol vol';
    row-gap: 8px;
  }
  .stem-list .stem-dot {
    grid-area: dot;
  }
  .stem-list .stem-name {
    grid-area: name;
  }
  .stem-list .stem-buttons {
    grid-area: buttons;
    justify-self: end;
  }
  .stem-list .stem-volume {
    grid-area: vol;
  }
  .stem-master {
    flex-wrap: wrap;
  }
  .stem-reset {
    order: 3;
  }
  .android-shots {
    grid-template-columns: 1fr 1fr;
  }
  .transfer-diagram {
    flex-direction: column;
    gap: 22px;
  }
  .transfer-packet {
    width: 2px;
    height: 46px;
    background: linear-gradient(180deg, transparent, var(--accent), transparent);
  }
}
@media (max-width: 480px) {
  .android-shots {
    grid-template-columns: 1fr;
  }
  .hero-actions .button {
    width: 100%;
    justify-content: center;
  }
}

.tryout-platforms {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 16px;
}
.tryout-platforms button {
  padding: 8px 18px;
  border: 1px solid var(--line, #45404e);
  border-radius: 8px;
  background: #211d27;
  color: #ddd7e6;
  cursor: pointer;
}
.tryout-platforms button[aria-pressed='true'] {
  background: #ff5c7a;
  color: #160e13;
  border-color: #ff5c7a;
}
.android-tryout #tryout-mount {
  max-width: 540px;
  margin: auto;
  height: 780px;
  max-height: 85dvh;
}
.android-tryout #tryout-mount iframe {
  min-width: 0;
  width: 100%;
  height: 100%;
}