@charset "UTF-8";

:root {
  --bg: #101118;
  --bg-2: #15171f;
  --panel: #191c26;
  --panel-2: #212532;
  --ink: #eceef6;
  --muted: #979eb3;
  --line: #2b3040;
  --coral: #ff5c6e;
  --coral-deep: #e13c52;
  --mint: #58e4b4;
  --shell: 1180px;
  --header-height: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
svg { display: block; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--mint); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--mint);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.4;
}
.eyebrow::before { width: 18px; height: 2px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(16, 17, 24, .92);
  backdrop-filter: blur(16px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 48px), var(--shell));
  min-height: var(--header-height);
  margin: 0 auto;
  gap: 22px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 21px; font-weight: 900; letter-spacing: -.4px; }
.brand img { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 12px; object-fit: contain; background: #fff; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(14px, 2.1vw, 28px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { position: relative; display: block; padding: 7px 0; color: #cfd4e2; font-size: 13px; font-weight: 700; }
.primary-nav a::before { position: absolute; left: -12px; top: 50%; width: 4px; height: 4px; content: ""; border-radius: 50%; background: var(--mint); opacity: 0; transform: translateY(-50%); transition: opacity .18s ease; }
.primary-nav a:hover { color: #fff; }
.primary-nav a:hover::before { opacity: 1; }
.nav-actions { display: flex; align-items: center; flex: none; gap: 12px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  gap: 8px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--coral);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
  transition: background .18s ease, transform .18s ease;
}
.nav-download:hover { background: var(--coral-deep); transform: translateY(-1px); }
.nav-download svg, .button svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 8px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; height: 2px; margin: 5px auto; background: var(--ink); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* hero: phone slab left, vertical beat rail right */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(640px 340px at 12% 6%, rgba(255, 92, 110, .16), transparent 62%),
    radial-gradient(520px 320px at 92% 88%, rgba(88, 228, 180, .1), transparent 66%),
    var(--bg);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, .032) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, .032) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(78% 68% at 50% 20%, #000, transparent 88%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 286px minmax(0, 1fr);
  align-items: center;
  gap: clamp(34px, 5vw, 72px);
  padding: 62px 0 44px;
}
.phone-stage { position: relative; margin: 0; }
.phone {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 9 / 16;
  padding: 9px;
  border: 1px solid #3a4055;
  border-radius: 30px;
  background: #0a0b10;
  box-shadow: 0 26px 50px rgba(0, 0, 0, .55);
}
.phone img { width: 100%; height: 100%; border-radius: 22px; object-fit: cover; object-position: top; }
.phone-notch {
  position: absolute;
  top: 15px;
  left: 50%;
  z-index: 2;
  width: 62px;
  height: 6px;
  border-radius: 999px;
  background: #0a0b10;
  transform: translateX(-50%);
}
.swipe-ruler {
  position: absolute;
  top: 6%;
  right: -24px;
  bottom: 12%;
  width: 20px;
  border-right: 1px dashed rgba(88, 228, 180, .5);
  background-image: repeating-linear-gradient(to bottom, rgba(88, 228, 180, .6) 0 1px, transparent 1px 22px);
  background-size: 8px 100%;
  background-repeat: no-repeat;
  background-position: right top;
}
.phone-caption { margin: 16px 0 0; color: var(--muted); font-size: 11px; letter-spacing: .6px; text-align: center; }
.hero-copy { min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  padding: 5px 13px;
  border: 1px solid rgba(255, 92, 110, .38);
  border-radius: 6px;
  background: rgba(255, 92, 110, .1);
  color: #ffa6b1;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.8px;
}
.hero-kicker::before { width: 5px; height: 5px; content: ""; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 4px rgba(255, 92, 110, .16); }
.hero h1 {
  margin: 0;
  font-size: clamp(50px, 6.6vw, 88px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.35vw, -3px);
  line-height: 1;
}
.hero-subtitle {
  display: inline-block;
  margin: 18px 0 0;
  padding-bottom: 4px;
  border-bottom: 3px solid var(--mint);
  color: #f4f6ff;
  font-size: clamp(18px, 2vw, 23px);
  font-weight: 800;
  line-height: 1.4;
}
.hero-lead { max-width: 560px; margin: 16px 0 0; color: var(--muted); font-size: 15px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; gap: 14px; padding: 0 24px; border: 1px solid transparent; border-radius: 10px; font-size: 14px; font-weight: 900; transition: transform .18s ease, background .18s ease; }
.button-primary { background: var(--coral); color: #fff; box-shadow: 0 14px 26px rgba(225, 60, 82, .3); }
.button-primary:hover { background: var(--coral-deep); transform: translateY(-2px); }
.text-link { color: #cfd4e2; border-bottom: 1px dashed rgba(207, 212, 226, .4); font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 6px; color: var(--mint); }

.beat-list { padding: 0; margin: 34px 0 0; list-style: none; border-top: 1px solid var(--line); }
.beat-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.beat-list b { color: var(--coral); font-family: Consolas, monospace; font-size: 15px; letter-spacing: 1px; }
.beat-list strong { display: block; font-size: 14px; font-weight: 800; }
.beat-list span { display: block; color: var(--muted); font-size: 12px; }
.beat-list em { color: var(--mint); font-size: 11px; font-style: normal; font-weight: 800; white-space: nowrap; }

.ride-strip {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 0;
  padding: 16px 26px;
  border: 1px solid var(--line);
  border-radius: 14px 14px 0 0;
  border-bottom: 0;
  background: var(--panel);
}
.ride-label { flex: none; color: #cfd4e2; font-size: 12px; font-weight: 800; letter-spacing: 1px; }
.ride-strip ul { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); flex: 1; gap: 10px; padding: 0; margin: 0; list-style: none; }
.ride-strip li { display: flex; align-items: baseline; gap: 8px; padding-left: 10px; border-left: 1px solid var(--line); }
.ride-strip b { color: var(--mint); font-family: Consolas, monospace; font-size: 13px; }
.ride-strip span { color: var(--muted); font-size: 11px; white-space: nowrap; }

/* shared heading */
.section-heading { margin-bottom: 32px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(26px, 3vw, 38px); font-weight: 900; letter-spacing: -.8px; line-height: 1.28; }
.section-heading > p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, 340px); align-items: end; gap: 30px; }
.section-heading-split > p:last-child { margin: 0 0 5px; }

/* rhythm cards */
.rhythm { padding: 78px 0 84px; background: var(--bg-2); }
.rhythm-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.rhythm-card {
  position: relative;
  padding: 26px 22px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid rgba(255, 92, 110, .65);
  border-radius: 4px;
  background: var(--panel);
  transition: transform .2s ease, border-color .2s ease;
}
.rhythm-card:nth-child(even) { margin-top: 22px; border-top-color: rgba(88, 228, 180, .6); }
.rhythm-card:hover { border-color: #3d4358; transform: translateY(-3px); }
.rhythm-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  font-family: Consolas, monospace;
  font-size: 11px;
}
.rhythm-card h3 { margin: 0 0 8px; font-size: 18px; font-weight: 900; letter-spacing: -.2px; }
.rhythm-card p { margin: 0; color: var(--muted); font-size: 13px; }
.rhythm-card small { display: inline-block; margin-top: 16px; padding: 2px 9px; border-radius: 4px; background: rgba(88, 228, 180, .12); color: var(--mint); font-size: 10px; font-weight: 800; letter-spacing: 1px; }

/* shots */
.shots { padding: 80px 0 96px; background: var(--bg); }
.shot-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.shot-card {
  margin: 0;
  padding: 9px 9px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}
.shot-card:nth-child(2), .shot-card:nth-child(4) { transform: translateY(26px); }
.shot-card img { width: 100%; height: clamp(280px, 24vw, 348px); border-radius: 9px; object-fit: cover; object-position: top; }
.shot-card figcaption { display: flex; align-items: flex-start; gap: 10px; padding: 11px 4px 2px; }
.shot-card b { color: var(--coral); font-family: Consolas, monospace; font-size: 11px; }
.shot-card span { font-size: 13px; font-weight: 800; line-height: 1.4; }
.shot-card small { display: block; margin-top: 3px; color: var(--muted); font-size: 11px; font-weight: 400; }

/* faq */
.faq { padding: 82px 0 90px; background: var(--bg-2); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr); gap: clamp(30px, 5vw, 70px); align-items: start; }
.faq-heading { position: sticky; top: calc(var(--header-height) + 26px); margin-bottom: 0; }
.faq-list { display: grid; gap: 10px; }
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
}
.faq-list details[open] { border-color: rgba(88, 228, 180, .35); background: var(--panel-2); }
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 20px;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15px; font-weight: 800; line-height: 1.5; }
.faq-list summary i { position: relative; flex: none; width: 18px; height: 18px; }
.faq-list summary i::before, .faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 12px; height: 2px; content: ""; background: var(--mint); transform: translate(-50%, -50%); }
.faq-list summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: opacity .18s ease; }
.faq-list details[open] summary i::after { opacity: 0; }
.faq-list details > p { margin: 0; padding: 0 20px 17px; color: #b7bdcf; font-size: 13px; }

/* reviews */
.reviews { padding: 82px 0 90px; background: var(--bg); }
.review-list { padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.review-card {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 26px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
}
.review-meta { display: flex; flex-direction: column; gap: 4px; }
.review-meta b { font-size: 14px; font-weight: 800; }
.review-meta time { color: var(--muted); font-family: Consolas, monospace; font-size: 11px; }
.review-card p { margin: 0; color: #c2c7d7; font-size: 14px; }

/* steps */
.steps { padding: 80px 0 92px; background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; padding: 0; margin: 0; list-style: none; }
.step-list li {
  position: relative;
  padding: 24px 24px 26px;
  border: 1px dashed #3b4157;
  border-radius: 12px;
  background: rgba(33, 37, 50, .5);
}
.step-list li::after {
  position: absolute;
  top: 46px;
  right: -21px;
  z-index: 2;
  width: 20px;
  height: 1px;
  content: "";
  background: #3b4157;
}
.step-list li:last-child::after { display: none; }
.step-list span { display: block; margin-bottom: 12px; color: var(--coral); font-family: Consolas, monospace; font-size: 24px; font-weight: 700; line-height: 1; }
.step-list h3 { margin: 0 0 7px; font-size: 17px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; }

/* download */
.download {
  padding: 84px 0 88px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(560px 260px at 50% 0%, rgba(255, 92, 110, .2), transparent 70%),
    var(--bg);
  text-align: center;
}
.download .eyebrow { justify-content: center; }
.download-inner { display: flex; flex-direction: column; align-items: center; }
.download h2 { max-width: 720px; }
.download p { max-width: 560px; margin: 14px 0 0; color: var(--muted); font-size: 14px; }
.download .button-large { min-height: 54px; margin-top: 28px; padding: 0 32px; font-size: 15px; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; padding: 0; margin: 24px 0 0; list-style: none; }
.download-notes li { padding: 5px 13px; border: 1px solid var(--line); border-radius: 999px; color: #b7bdcf; font-size: 11px; }

/* footer */
.site-footer { padding: 44px 0 52px; border-top: 1px solid var(--line); background: #0b0c11; }
.footer-grid { display: grid; grid-template-columns: 1.1fr 1.4fr 1fr; align-items: start; gap: 28px; }
.footer-brand strong { font-size: 18px; font-weight: 900; }
.footer-brand p { margin: 6px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-nav a { color: #b7bdcf; font-size: 12px; }
.footer-nav a:hover { color: var(--mint); }
.footer-meta { text-align: right; }
.footer-meta p { margin: 0 0 6px; color: var(--muted); font-size: 12px; }
.footer-meta a { color: #b7bdcf; font-size: 12px; }
.footer-meta a:hover { color: var(--mint); }
.disclaimer { grid-column: 1 / -1; margin: 8px 0 0; padding-top: 18px; border-top: 1px solid var(--line); color: #6f7688; font-size: 11px; line-height: 1.8; }

/* responsive */
@media (max-width: 1080px) {
  .rhythm-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shot-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shot-card:nth-child(2), .shot-card:nth-child(4) { transform: none; }
  .shot-card img { height: 330px; }
  .ride-strip { flex-wrap: wrap; gap: 12px; }
  .ride-strip ul { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 8px; }
}

@media (max-width: 900px) {
  :root { --header-height: 64px; }
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    padding: 10px 24px 18px;
    border-bottom: 1px solid var(--line);
    background: rgba(16, 17, 24, .98);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav li { border-bottom: 1px solid var(--line); }
  .primary-nav a { padding: 12px 4px; font-size: 14px; }
  .primary-nav a::before { display: none; }
  .hero-inner { grid-template-columns: minmax(0, 1fr); padding: 40px 0 36px; }
  .phone-stage { order: 2; width: min(250px, 64%); margin: 8px auto 0; }
  .swipe-ruler { right: -22px; }
  .faq-layout { grid-template-columns: minmax(0, 1fr); }
  .faq-heading { position: static; }
  .review-card { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-meta { text-align: left; }
}

@media (max-width: 720px) {
  .page-shell { width: calc(100% - 32px); }
  .nav-shell { width: calc(100% - 32px); gap: 10px; }
  .brand { font-size: 18px; }
  .brand img { width: 34px; height: 34px; }
  .nav-download { min-height: 38px; padding: 0 13px; font-size: 12px; }
  .hero h1 { font-size: clamp(44px, 13vw, 62px); }
  .beat-list li { grid-template-columns: 34px minmax(0, 1fr); }
  .beat-list em { display: none; }
  .ride-strip { padding: 14px 16px; }
  .ride-strip ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rhythm, .shots, .faq, .reviews, .steps { padding: 58px 0 62px; }
  .rhythm-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .rhythm-card:nth-child(even) { margin-top: 0; }
  .shot-row { grid-template-columns: minmax(0, 1fr); }
  .shot-card img { height: auto; aspect-ratio: 9 / 13; }
  .section-heading-split { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
  .step-list { grid-template-columns: minmax(0, 1fr); }
  .step-list li::after { display: none; }
  .download { padding: 62px 0 68px; }
  .download-notes { gap: 7px; }
}