:root {
  color-scheme: dark;
  --bg: #07080c;
  --panel: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.64);
  --faint: rgba(255, 255, 255, 0.42);
  --line: rgba(255, 255, 255, 0.13);
  --orange: #ff4b1f;
  --orange-bright: #ff7a22;
  --gold: #ffd66b;
  --green: #7cffb2;
  --radius-lg: 32px;
  --radius-md: 22px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; background: var(--bg); overscroll-behavior-y: none; }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--bg);
  isolation: isolate;
  overscroll-behavior-y: none;
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  background:
    radial-gradient(circle at 20% -10%, rgba(255, 122, 34, 0.34), transparent 36rem),
    radial-gradient(circle at 92% 14%, rgba(255, 75, 31, 0.24), transparent 34rem),
    linear-gradient(180deg, #0c0d13 0%, #07080c 44%, #090a0f 100%);
}
body::after {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image: linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 78%);
}
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
.page-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 16px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 16px 0 72px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(7, 8, 12, 0.72);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(22px) saturate(150%);
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand img { width: 44px; height: 44px; border-radius: 13px; box-shadow: 0 10px 24px rgba(255, 75, 31, 0.3); }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 15px; letter-spacing: -0.01em; }
.brand small { margin-top: 2px; color: var(--faint); font-size: 12px; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a { padding: 10px 12px; border-radius: 999px; color: var(--muted); font-size: 14px; transition: color 180ms ease, background 180ms ease; }
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.home-link { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 14px; border: 1px solid rgba(255,255,255,.14); border-radius: 999px; color: #fff; background: linear-gradient(135deg, rgba(255,122,34,.22), rgba(255,75,31,.16)); font-size: 14px; font-weight: 800; white-space: nowrap; transition: transform 180ms ease, border-color 180ms ease, background 180ms ease; }
.home-link:hover { transform: translateY(-1px); border-color: rgba(255,122,34,.44); background: linear-gradient(135deg, rgba(255,122,34,.34), rgba(255,75,31,.24)); }

.section, .hero { margin-bottom: 92px; }
.section-grid { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.82fr); gap: 52px; align-items: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin: 0 0 16px;
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  color: #ffd0be;
  background: rgba(255, 75, 31, 0.12);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 760px; margin-bottom: 20px; font-size: clamp(44px, 7vw, 82px); line-height: 0.98; letter-spacing: -0.07em; }
h2 { margin-bottom: 14px; font-size: clamp(32px, 4.5vw, 54px); line-height: 1.02; letter-spacing: -0.055em; }
h3 { margin-bottom: 10px; font-size: 20px; letter-spacing: -0.03em; }
.lead, .section-heading p, .split-panel p, .download-card p { color: var(--muted); font-size: 18px; line-height: 1.72; }
.lead { max-width: 700px; margin-bottom: 30px; }

.hero-actions, .download-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 800;
  letter-spacing: -0.01em;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0) scale(0.98); }
.button.primary { color: #fff; background: linear-gradient(135deg, var(--orange-bright), var(--orange)); box-shadow: 0 16px 34px rgba(255, 75, 31, 0.34); }
.button.ghost { border: 1px solid var(--line); color: var(--text); background: rgba(255, 255, 255, 0.07); }
.hero-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; max-width: 650px; margin: 34px 0 0; }
.hero-stats div { padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255, 255, 255, 0.06); }
.hero-stats dt { color: var(--gold); font-size: 13px; font-weight: 800; }
.hero-stats dd { margin: 5px 0 0; color: var(--muted); font-size: 14px; }

.hero-visual { position: relative; min-height: 560px; }
.hero-visual::before, .hero-visual::after { position: absolute; content: ""; border-radius: 999px; filter: blur(5px); }
.hero-visual::before { top: 12px; right: 22px; width: 180px; height: 180px; background: rgba(255, 122, 34, 0.28); }
.hero-visual::after { bottom: 34px; left: 0; width: 230px; height: 230px; background: rgba(255, 214, 107, 0.12); }
.phone-card {
  position: relative;
  z-index: 1;
  width: min(100%, 430px);
  margin: 0 auto;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 44px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.07));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(24px) saturate(150%);
}
.phone-topbar { display: flex; justify-content: center; gap: 6px; padding: 4px 0 16px; }
.phone-topbar span { width: 7px; height: 7px; border-radius: 999px; background: rgba(255, 255, 255, 0.32); }
.recording-stage { position: relative; min-height: 520px; overflow: hidden; border-radius: 30px; background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(0,0,0,.42)), linear-gradient(135deg, #302924, #141929 45%, #06070a); }
.recording-stage.hero-video-stage { min-height: auto; aspect-ratio: 3 / 4; border: 1px solid rgba(255,255,255,.16); background: #08090f; box-shadow: inset 0 1px 0 rgba(255,255,255,.1); }
.hero-product-video { display: block; width: 100%; height: 100%; object-fit: contain; background: #08090f; }
.scene-overlay { position: absolute; inset: 0; background: radial-gradient(circle at 30% 26%, rgba(255, 214, 107, 0.2), transparent 12rem), linear-gradient(160deg, transparent 0 48%, rgba(255, 75, 31, 0.32) 49% 52%, transparent 53%), repeating-linear-gradient(90deg, rgba(255,255,255,.04) 0 1px, transparent 1px 64px); }
.pip-window { position: absolute; top: 24px; right: 22px; width: 142px; padding: 14px; border: 1px solid rgba(255,255,255,.24); border-radius: 26px; background: rgba(255,255,255,.14); box-shadow: 0 22px 46px rgba(0,0,0,.28); backdrop-filter: blur(18px); }
.avatar { height: 132px; border-radius: 20px; background: radial-gradient(circle at 50% 34%, #fff 0 18px, transparent 19px), radial-gradient(circle at 50% 72%, #fff 0 40px, transparent 41px), linear-gradient(160deg, #ff8a2f, #ff2f1f); }
.pip-window span { display: block; margin-top: 10px; color: rgba(255,255,255,.68); font-size: 12px; font-weight: 700; }
.subtitle-card { position: absolute; right: 22px; bottom: 86px; left: 22px; padding: 14px 16px; border: 1px solid rgba(255,255,255,.16); border-radius: 18px; color: #fff; background: rgba(0,0,0,.54); box-shadow: 0 16px 36px rgba(0,0,0,.3); font-size: 17px; font-weight: 800; line-height: 1.45; text-align: center; backdrop-filter: blur(16px); }
.record-dot { position: absolute; left: 22px; bottom: 26px; display: inline-flex; align-items: center; gap: 8px; padding: 9px 12px; border-radius: 999px; background: rgba(0,0,0,.46); color: rgba(255,255,255,.82); font-size: 12px; font-weight: 800; }
.record-dot span { width: 9px; height: 9px; border-radius: 999px; background: #ff3222; box-shadow: 0 0 0 7px rgba(255, 50, 34, 0.14); }
.timeline-preview { display: grid; gap: 9px; margin-top: 16px; padding: 16px; border-radius: 24px; background: rgba(0,0,0,.28); }
.timeline-preview span { width: var(--w); height: 8px; border-radius: 999px; background: linear-gradient(90deg, var(--orange), var(--gold)); }

.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading.compact { margin-bottom: 24px; }
.video-showcase {
  padding: 36px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.045);
}
.video-grid {
  display: grid;
  grid-template-columns: minmax(250px, .68fr) minmax(420px, 1.32fr);
  gap: 18px;
  align-items: stretch;
}
.video-card {
  display: grid;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.045));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
}
.video-card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.video-card-heading h3 { margin-bottom: 0; }
.video-card-heading span { color: var(--faint); font-size: 13px; font-weight: 800; }
.video-frame {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  background: #08090f;
  box-shadow: 0 22px 56px rgba(0,0,0,.34);
}
.mobile-video-frame {
  width: min(100%, 310px);
  aspect-ratio: 9 / 16;
  margin: 0 auto;
}
.mac-video-frame { aspect-ratio: 16 / 9; }
.video-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.feature-card, .steps article, .platform-list article, .download-card { border: 1px solid var(--line); background: linear-gradient(180deg, var(--panel), rgba(255,255,255,.045)); box-shadow: inset 0 1px 0 rgba(255,255,255,.08); backdrop-filter: blur(18px); }
.feature-card { min-height: 236px; padding: 24px; border-radius: var(--radius-md); }
.feature-card p, .steps p, .platform-list p { margin-bottom: 0; color: var(--muted); line-height: 1.7; }
.icon-badge { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; margin-bottom: 24px; border-radius: 14px; color: #fff; background: linear-gradient(135deg, var(--orange-bright), var(--orange)); box-shadow: 0 14px 26px rgba(255,75,31,.24); font-size: 13px; font-weight: 900; }
.workflow { padding: 36px; border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius-lg); background: rgba(255,255,255,.045); }
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.steps article { padding: 22px; border-radius: 24px; }
.steps strong { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; margin-bottom: 22px; border-radius: 999px; color: #111; background: var(--gold); }
.split-panel, .download-card { display: grid; grid-template-columns: minmax(0, .9fr) minmax(320px, .8fr); gap: 26px; align-items: center; padding: 36px; border-radius: var(--radius-lg); }
.platform-list { display: grid; gap: 14px; }
.platform-list article { padding: 22px; border-radius: 24px; }
.platform-list span, .download-actions span { display: inline-flex; margin-top: 14px; color: var(--green); font-size: 13px; font-weight: 800; }
.download-card { background: linear-gradient(135deg, rgba(255,122,34,.18), rgba(255,255,255,.06)), rgba(255,255,255,.055); }
.download-actions { justify-content: flex-end; text-align: right; }
.engagement-section { display: grid; gap: 22px; }
.engagement-heading { max-width: 820px; margin-bottom: 0; }
.engagement-grid { display: grid; grid-template-columns: minmax(260px, .42fr) minmax(0, 1fr); gap: 18px; align-items: start; }
.like-panel, .comments-panel { border: 1px solid var(--line); border-radius: var(--radius-lg); background: linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.045)); box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.08); backdrop-filter: blur(18px); }
.like-panel { position: sticky; top: 112px; display: grid; justify-items: start; gap: 13px; padding: 28px; overflow: hidden; }
.like-panel::before { position: absolute; inset: -80px -70px auto auto; width: 190px; height: 190px; border-radius: 999px; content: ""; background: rgba(255, 122, 34, 0.28); filter: blur(24px); }
.like-panel > * { position: relative; z-index: 1; }
.like-panel h3 { margin: 0; font-size: clamp(26px, 4vw, 36px); letter-spacing: -0.04em; }
.like-button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-width: 166px; min-height: 56px; margin-top: 8px; border: 0; border-radius: 999px; color: #fff; background: linear-gradient(135deg, var(--orange-bright), var(--orange)); box-shadow: 0 18px 42px rgba(255, 75, 31, 0.34); font: inherit; font-size: 17px; font-weight: 900; cursor: pointer; transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease; }
.like-button:hover { transform: translateY(-2px); box-shadow: 0 22px 52px rgba(255, 75, 31, 0.44); }
.like-button:disabled { cursor: default; opacity: 0.72; transform: none; }
.like-button-icon { color: var(--gold); font-size: 22px; line-height: 1; }
.like-count { display: flex; align-items: baseline; gap: 8px; margin: 6px 0 0; color: var(--muted); }
.like-count strong { color: #fff; font-size: clamp(34px, 6vw, 54px); line-height: 1; letter-spacing: -0.05em; }
.engagement-status { margin: 0; color: var(--faint); font-size: 14px; line-height: 1.6; }
.engagement-status[data-status="success"] { color: rgba(124, 255, 178, 0.82); }
.engagement-status[data-status="error"] { color: rgba(255, 214, 107, 0.92); }
.comments-panel { padding: clamp(22px, 4vw, 34px); }
.comments-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 22px; }
.comments-header h3 { margin-bottom: 0; font-size: clamp(25px, 4vw, 34px); letter-spacing: -0.035em; }
.comments-header > p { margin: 0; color: var(--faint); font-size: 14px; white-space: nowrap; }
.comment-form { display: grid; gap: 14px; margin-bottom: 24px; }
.comment-field-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.comment-form label { display: grid; gap: 8px; color: var(--muted); font-size: 13px; font-weight: 800; }
.comment-form input, .comment-form textarea { width: 100%; border: 1px solid var(--line); border-radius: 16px; outline: none; color: var(--text); background: rgba(7, 8, 12, 0.38); font: inherit; transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease; }
.comment-form input { min-height: 48px; padding: 0 14px; }
.comment-form textarea { min-height: 112px; padding: 13px 14px; resize: vertical; }
.comment-form input:focus, .comment-form textarea:focus { border-color: rgba(255, 122, 34, 0.68); box-shadow: 0 0 0 4px rgba(255, 122, 34, 0.13); background: rgba(7, 8, 12, 0.58); }
.comment-form button { justify-self: end; min-height: 48px; border: 0; cursor: pointer; }
.comment-list { display: grid; gap: 14px; }
.comment-empty { margin: 0; padding: 22px; border: 1px dashed var(--line); border-radius: 18px; color: var(--faint); text-align: center; }
.comment-card { padding: 18px; border: 1px solid var(--line); border-radius: 20px; background: rgba(7, 8, 12, 0.32); }
.comment-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--faint); font-size: 13px; }
.comment-meta strong { color: #fff; font-size: 14px; }
.comment-meta time { white-space: nowrap; }
.comment-contact { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; color: rgba(255,255,255,.72); font-size: 13px; }
.comment-contact span { border: 1px solid rgba(255,255,255,.1); border-radius: 999px; padding: 6px 10px; background: rgba(255,255,255,.055); }
.comment-content { margin: 12px 0 0; color: var(--muted); font-size: 15px; line-height: 1.68; white-space: pre-wrap; }
.site-footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; padding: 32px 0 44px; border-top: 1px solid rgba(255,255,255,.1); color: var(--faint); font-size: 13px; }
.site-footer p { margin: 0; }
.footer-links { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.footer-links a { color: var(--muted); transition: color 180ms ease; }
.footer-links a:hover { color: #fff; }

@media (max-width: 920px) {
  .site-header { align-items: flex-start; margin-bottom: 48px; }
  .nav-links { display: none; }
  .section-grid, .video-grid, .split-panel, .download-card { grid-template-columns: 1fr; }
  .engagement-grid, .comment-field-grid { grid-template-columns: 1fr; }
  .like-panel { position: relative; top: auto; }
  .hero-visual { min-height: auto; }
  .feature-grid, .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .download-actions { justify-content: flex-start; text-align: left; }
}

@media (max-width: 620px) {
  .page-shell { width: min(100% - 24px, 1180px); }
  .site-header { top: 10px; margin-top: 10px; border-radius: 20px; }
  .hero, .section { margin-bottom: 58px; }
  h1 { font-size: clamp(40px, 14vw, 58px); }
  .lead, .section-heading p, .split-panel p, .download-card p { font-size: 16px; }
  .hero-stats, .feature-grid, .steps { grid-template-columns: 1fr; }
  .phone-card { border-radius: 34px; padding: 12px; }
  .recording-stage { min-height: 460px; border-radius: 24px; }
  .pip-window { width: 122px; }
  .avatar { height: 112px; }
  .workflow, .split-panel, .download-card, .like-panel, .comments-panel { padding: 22px; border-radius: 26px; }
  .comments-header { align-items: flex-start; flex-direction: column; }
  .comment-form button, .like-button { width: 100%; }
  .site-footer { display: grid; }
}