:root {
  --bg: #0b0d10;
  --panel: #13161b;
  --panel-2: #181c22;
  --line: rgba(255, 255, 255, 0.09);
  --text: #f4f4f5;
  --muted: #8b8f98;
  --faint: #5e636c;
  --orange: #ff7a45;
  --orange-soft: #ffb08f;
  --green: #34d399;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1100px 600px at 78% -10%, rgba(255, 122, 69, 0.13), transparent 60%),
    radial-gradient(800px 500px at 10% 20%, rgba(56, 189, 248, 0.06), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 28px;
  background: rgba(11, 13, 16, 0.78);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
}
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 32px;
  border-radius: 9px;
  background: var(--orange);
  color: #17100c;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.04em;
}
.brand-mark.small { width: 34px; height: 26px; font-size: 9px; }
.brand-text {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: #b9bcc3;
}
.nav { display: flex; align-items: center; gap: 26px; }
.nav a { font-size: 12px; color: var(--muted); }
.nav a:hover { color: var(--text); }
.nav-cta {
  padding: 9px 16px;
  border: 1px solid rgba(255, 122, 69, 0.45);
  border-radius: 999px;
  color: var(--orange-soft) !important;
  background: rgba(255, 122, 69, 0.08);
}

main { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 54px;
  min-height: 620px;
  align-items: center;
  padding: 68px 0 80px;
}
.hero-copy { position: relative; z-index: 2; }
.eyebrow {
  margin: 0 0 14px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--orange);
}
h1, h2, h3 { margin: 0; }
h1 {
  font-size: clamp(42px, 4.6vw, 58px);
  line-height: 1.18;
  letter-spacing: -0.04em;
  font-weight: 900;
}
.hero-desc {
  margin: 22px 0 0;
  color: #a4a8b0;
  font-size: 15px;
  line-height: 1.9;
}
.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 14px;
  font-size: 13px;
  font-weight: 700;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:active { transform: scale(0.98); }
.btn.primary { background: var(--orange); color: #1a110c; }
.btn.primary:hover { background: #ff8a5a; }
.btn.ghost {
  color: #d4d4d8;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}
.android { font-size: 17px; line-height: 1; }
.meta-row {
  display: flex;
  gap: 18px;
  margin-top: 25px;
  color: var(--muted);
  font-size: 11px;
}
.tiny-note { margin: 14px 0 0; color: var(--faint); font-size: 10px; line-height: 1.7; }

.hero-visual { position: relative; min-height: 520px; }
.glow {
  position: absolute;
  width: 380px;
  height: 380px;
  right: 5%;
  top: 15%;
  background: radial-gradient(circle, rgba(255, 122, 69, 0.22), transparent 68%);
  filter: blur(20px);
}
.phone {
  position: absolute;
  padding: 7px;
  border-radius: 32px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: #050607;
  box-shadow: 0 35px 90px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}
.phone img { border-radius: 25px; width: 100%; height: auto; min-height: 100%; object-fit: initial; }
.phone-main { width: 292px; height: 520px; right: 24px; top: 0; transform: rotate(-2.5deg); }
.phone-side {
  width: 178px;
  height: 360px;
  right: 0;
  bottom: 8px;
  transform: rotate(5deg);
  opacity: 0.9;
}
.phone-feature {
  position: relative;
  width: 285px;
  height: 510px;
  margin: 0 auto;
  transform: rotate(2deg);
}
.phone-main img, .phone-side img, .phone-feature img { object-position: top center; }

.strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 22px 0;
}
.strip div {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0 24px;
  border-right: 1px solid var(--line);
}
.strip div:first-child { padding-left: 0; }
.strip div:last-child { border-right: 0; }
.strip strong { font-size: 20px; font-weight: 900; }
.strip span { color: var(--muted); font-size: 10px; }

.section { padding: 92px 0; border-bottom: 1px solid var(--line); }
.section-head { max-width: 700px; margin-bottom: 36px; }
.section h2 {
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.28;
  letter-spacing: -0.03em;
  font-weight: 900;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.card {
  position: relative;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
}
.card-no {
  position: absolute;
  top: 20px;
  right: 20px;
  color: #454950;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
}
.card h3 { margin-top: 30px; font-size: 16px; }
.card p { margin: 10px 0 0; color: var(--muted); font-size: 12px; line-height: 1.8; }

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 52px;
  align-items: center;
}
.split-copy p { color: var(--muted); font-size: 14px; line-height: 1.9; }
.ticks { margin: 22px 0 0; padding: 0; list-style: none; }
.ticks li {
  position: relative;
  padding-left: 22px;
  margin: 11px 0;
  color: #c8cbd1;
  font-size: 12px;
  line-height: 1.7;
}
.ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 69, 0.1);
}

.install { padding-bottom: 72px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.step {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.025);
}
.step > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background: rgba(255, 122, 69, 0.12);
  color: var(--orange-soft);
  font-size: 11px;
  font-weight: 800;
}
.step h3 { margin-top: 18px; font-size: 14px; }
.step p { margin: 8px 0 0; color: var(--muted); font-size: 11px; line-height: 1.8; }
.install-note {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid rgba(255, 122, 69, 0.18);
  border-radius: 12px;
  background: rgba(255, 122, 69, 0.05);
  color: var(--muted);
  font-size: 11px;
}
.install-note strong { color: var(--orange-soft); white-space: nowrap; }

.download-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}
.download-band h2 { font-size: clamp(26px, 3vw, 38px); }
.muted { color: var(--muted); font-size: 11px; margin: 10px 0 0; }

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  font-weight: 600;
  color: #e4e4e7;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--orange); font-size: 18px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq p { margin: 12px 0 0; color: var(--muted); font-size: 12px; line-height: 1.9; }
code { color: var(--orange-soft); font-size: 10px; word-break: break-all; }

footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 28px 60px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand strong { display: block; font-size: 12px; }
.footer-brand p { margin: 4px 0 0; color: var(--faint); font-size: 10px; }
.footer-links { display: flex; gap: 18px; margin-top: 26px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); font-size: 11px; }
.footer-links a:hover { color: var(--text); }
.copyright { margin: 28px 0 0; padding-top: 20px; border-top: 1px solid var(--line); color: #4b4f57; font-size: 10px; }

/* ---------- WeChat in-app browser guide ---------- */
.wx-mask {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 19vh 20px 24px;
  background: rgba(4, 5, 7, 0.86);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  overflow-y: auto;
}
.wx-mask[hidden] { display: none; }
.wx-sheet {
  position: relative;
  width: 100%;
  max-width: 350px;
  padding: 26px 22px 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 22px;
  background: linear-gradient(170deg, #1a1d23, #121419);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  text-align: center;
  animation: wxIn 0.22s ease-out;
}
@keyframes wxIn {
  from { opacity: 0; transform: translateY(10px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
.wx-point {
  position: absolute;
  top: -58px;
  right: 14px;
  color: var(--orange-soft);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  animation: wxBob 1.6s ease-in-out infinite;
}
.wx-point span { display: block; margin-top: 2px; font-size: 26px; line-height: 1; }
@keyframes wxBob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.wx-sheet h2 { margin: 0; font-size: 20px; letter-spacing: -0.02em; }
.wx-sheet > p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.85;
}
.wx-steps {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  text-align: left;
}
.wx-steps li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  color: #d2d5da;
  font-size: 12px;
}
.wx-steps li span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  border-radius: 7px;
  background: rgba(255, 122, 69, 0.14);
  color: var(--orange-soft);
  font-size: 10px;
  font-weight: 800;
}
.wx-copy { width: 100%; margin-top: 16px; min-height: 44px; }
.wx-close {
  width: 100%;
  margin-top: 8px;
  padding: 12px 0 2px;
  border: 0;
  background: none;
  color: var(--faint);
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
}
.wx-close:hover { color: var(--muted); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 30px; padding-top: 42px; }
  .hero-visual { min-height: 440px; max-width: 460px; }
  .phone-main { width: 235px; height: 420px; right: 20%; }
  .phone-side { width: 145px; height: 290px; right: 2%; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 24px; }
  .phone-feature { width: 240px; height: 430px; }
}
@media (max-width: 640px) {
  .topbar { padding: 14px 16px; }
  .nav { gap: 12px; }
  .nav a:not(.nav-cta) { display: none; }
  .nav-cta { padding: 8px 12px; font-size: 11px; }
  main { padding: 0 16px; }
  .hero { min-height: auto; padding: 40px 0 54px; }
  h1 { font-size: 40px; }
  .hero-desc { font-size: 13px; }
  .desktop { display: none; }
  .hero-visual { min-height: 390px; margin-top: 8px; }
  .phone-main { width: 210px; height: 375px; right: 17%; }
  .phone-side { width: 124px; height: 248px; right: 0; bottom: 0; }
  .strip { grid-template-columns: repeat(2, 1fr); padding: 0; }
  .strip div { padding: 16px 14px; border-bottom: 1px solid var(--line); }
  .strip div:nth-child(2) { border-right: 0; }
  .strip div:nth-child(3) { padding-left: 14px; }
  .strip div:nth-child(3), .strip div:nth-child(4) { border-bottom: 0; }
  .section { padding: 58px 0; }
  .section-head { margin-bottom: 24px; }
  .cards { grid-template-columns: 1fr; }
  .card { padding: 22px; }
  .steps { grid-template-columns: 1fr; }
  .download-band { flex-direction: column; align-items: flex-start; padding: 42px 0; }
  .install-note { align-items: flex-start; flex-direction: column; gap: 4px; }
  footer { padding: 34px 16px 46px; }
}