@charset "UTF-8";

:root {
  --void: #0b0d18;
  --indigo: #1b1f4a;
  --violet: #8b7cff;
  --silver: #c9d4e8;
  --frost: #eef1f8;
  --paper: #f7f8fd;
  --ink: #16182a;
  --mute: #5d6280;
  --nav-shadow: 2px 2px 0 rgba(11, 13, 24, 0.35);
  --long-shadow: 0 28px 50px rgba(11, 13, 24, 0.22);
  --header-h: 76px;
  --content: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  margin: 0;
  min-width: 320px;
  padding-top: var(--header-h);
  color: var(--ink);
  background: var(--frost);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
p, h1, h2, h3, figure { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
.frame { width: min(calc(100% - 40px), var(--content)); margin: 0 auto; }

.topbar {
  position: fixed; z-index: 1000; top: 0; right: 0; left: 0; height: var(--header-h);
  background: var(--void);
  border-bottom: 1px solid rgba(139, 124, 255, 0.28);
}
.topbar-frame { display: flex; height: 100%; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand img { width: 48px; height: 48px; object-fit: contain; background: #fff; box-shadow: var(--nav-shadow); }
.brand span { display: grid; line-height: 1.2; }
.brand strong { color: #fff; font-size: 18px; }
.brand small { color: #9aa3c4; font-size: 12px; }
.main-menu ul { display: flex; gap: 26px; }
.main-menu a { position: relative; display: block; padding: 26px 0 22px; color: #d7dcee; font-size: 14px; font-weight: 700; }
.main-menu a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 14px; height: 2px;
  background: var(--violet); transform: scaleX(0);
}
.main-menu a:hover, .main-menu a.current { color: var(--violet); }
.main-menu a:hover::after, .main-menu a.current::after { transform: scaleX(1); }
.header-get, .mobile-get, .get-btn, .opening-action a {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 42px; padding: 0 18px; background: var(--violet); color: #fff;
  font-weight: 800; box-shadow: var(--nav-shadow);
}
.header-get:hover, .opening-action a:hover, .get-btn:hover { background: #a396ff; }
.mobile-controls { display: none; align-items: center; gap: 8px; }
.nav-switch { width: 42px; height: 42px; display: grid; place-content: center; gap: 5px; border: 1px solid #34385c; }
.nav-switch i { display: block; width: 18px; height: 2px; background: #fff; }

.opening {
  min-height: 720px; color: #fff;
  background:
    linear-gradient(90deg, var(--void) 0 49.6%, var(--indigo) 50.4% 100%);
}
.opening-frame {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: center;
  min-height: 720px;
  padding: 64px 0;
}
.overline { color: var(--violet); font-size: 12px; font-weight: 800; letter-spacing: 0.2em; }
.opening h1 { margin-top: 10px; font-size: clamp(44px, 6vw, 72px); line-height: 1; }
.opening-kicker { margin-top: 14px; color: var(--silver); font-size: 22px; font-weight: 800; }
.opening-lead { max-width: 36em; margin-top: 16px; color: #b7bed8; }
.line-keys { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.line-keys button {
  min-height: 40px; padding: 0 14px;
  border: 1px solid #3a4068; color: #d7dcee; font-weight: 800;
}
.line-keys .is-on { background: var(--violet); color: #fff; border-color: var(--violet); }
.line-note { margin-top: 10px; color: var(--violet); font-size: 13px; font-weight: 800; }
.opening-action { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; margin-top: 26px; }
.opening-action a { min-width: 190px; padding: 14px 24px; }
.opening-action span { color: #8b93b3; font-size: 12px; }

.split {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: 460px;
}
.split::before {
  content: "";
  position: absolute; left: 50%; top: 8%; bottom: 8%;
  width: 2px; margin-left: -1px;
  background: var(--violet);
  box-shadow: 0 0 18px var(--violet);
}
.phone {
  padding: 12px 10px 14px;
  background: #101326;
  border: 1px solid #34385c;
  box-shadow: var(--long-shadow);
}
.phone.a { transform: translate(-8px, 18px); animation: drift 6s ease-in-out infinite; }
.phone.b { transform: translate(8px, -12px); animation: drift 6s ease-in-out infinite reverse; }
.phone b { display: block; width: 64px; height: 7px; margin: 0 auto 10px; border-radius: 99px; background: #3a4068; }
.phone img { width: 100%; height: auto; max-height: 400px; object-fit: contain; background: #000; }

.timeline { padding: 84px 0; background: var(--paper); }
.block-head { margin-bottom: 28px; }
.block-head p { color: #6a5ce0; font-size: 12px; font-weight: 800; letter-spacing: 0.16em; }
.block-head.dark p { color: var(--violet); }
.block-head h2 { margin-top: 8px; font-size: clamp(28px, 4vw, 40px); }
.spine {
  position: relative;
  display: grid;
  gap: 0;
  padding-left: 0;
}
.spine::before {
  content: "";
  position: absolute; left: 50%; top: 0; bottom: 0;
  width: 2px; margin-left: -1px;
  background: #d5d8ea;
}
.spine article {
  position: relative;
  width: 46%;
  padding: 24px 26px;
  background: #fff;
  box-shadow: var(--long-shadow);
}
.spine article::after {
  content: "";
  position: absolute; top: 28px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 0 6px rgba(139,124,255,.18);
}
.spine .l { margin-right: auto; }
.spine .l::after { right: -8.2%; }
.spine .r { margin-left: auto; background: var(--indigo); color: #fff; }
.spine .r::after { left: -8.2%; }
.spine span { display: block; margin-bottom: 8px; font-size: 12px; font-weight: 900; letter-spacing: 0.14em; color: var(--violet); }
.spine .r span { color: var(--silver); }
.spine p { margin-top: 8px; color: var(--mute); }
.spine .r p { color: #c5cbe0; }
.spine article:hover { transform: translateY(-5px); }

.cascade-wrap { padding: 84px 0; background: var(--void); color: #f7f8fd; }
.cascade-wrap .block-head h2 { color: #fff; }
.cascade {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  align-items: start;
}
.cascade figure {
  margin: 0;
  padding: 10px;
  background: #15182c;
  border: 1px solid #34385c;
  box-shadow: var(--long-shadow);
}
.cascade figure:nth-child(2) { margin-top: 36px; }
.cascade figure:nth-child(3) { margin-top: 72px; }
.cascade figure:nth-child(4) { margin-top: 18px; }
.bezel { padding: 8px 6px 10px; background: #0b0d18; }
.bezel::before { content: ""; display: block; width: 48px; height: 6px; margin: 0 auto 8px; border-radius: 99px; background: #3a4068; }
.bezel img { width: 100%; height: auto; max-height: 360px; object-fit: contain; background: #000; }
.cascade figcaption { margin-top: 10px; font-size: 13px; font-weight: 800; color: var(--silver); }
.cascade figure:hover { transform: translateY(-6px); }

.faq { padding: 84px 0; background: var(--frost); }
.nodes { display: grid; gap: 0; }
.node {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid #d8dcec;
}
.node:last-child { border-bottom: 1px solid #d8dcec; }
.node b {
  display: grid; place-items: center;
  width: 56px; height: 56px;
  background: var(--indigo); color: var(--silver);
  font-size: 13px; font-weight: 900;
}
.node:nth-child(odd) b { background: var(--violet); color: #fff; }
.node h3 { font-size: 18px; }
.node p { margin-top: 8px; color: var(--mute); }
.node:hover b { transform: scale(1.06); }

.reviews { padding: 84px 0 36px; background: var(--paper); }
.bubbles { display: grid; gap: 16px; }
.bubbles article {
  width: min(100%, 86%);
  padding: 18px 20px;
  background: #fff;
  box-shadow: var(--long-shadow);
}
.bubbles article:nth-child(even) {
  margin-left: auto;
  background: var(--indigo);
  color: #fff;
}
.bubbles time { display: block; margin-bottom: 8px; color: var(--violet); font-size: 12px; font-weight: 900; }
.bubbles article:nth-child(even) time { color: var(--silver); }
.bubbles span { display: block; margin-top: 8px; color: var(--mute); font-size: 12px; font-weight: 800; }
.bubbles article:nth-child(even) span { color: #b7bed8; }

.download { padding: 12px 0 88px; background: var(--frost); }
.rift {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 240px;
  overflow: hidden;
  box-shadow: var(--long-shadow);
}
.rift-a { background: var(--void); }
.rift-b {
  display: flex; flex-direction: column; justify-content: center;
  padding: 36px 36px 32px;
  background: var(--violet); color: #fff;
}
.rift-b small { display: block; margin-bottom: 8px; font-weight: 900; letter-spacing: 0.16em; opacity: .85; }
.rift-b h2 { font-size: clamp(26px, 3vw, 36px); }
.rift-b p { max-width: 38ch; margin: 10px 0 20px; color: #efeaff; }
.rift-b .get-btn { background: #fff; color: var(--indigo); width: fit-content; }
.rift-b .get-btn:hover { background: var(--frost); }
.rift-a {
  display: grid;
  place-items: center;
  padding: 24px;
}
.rift-a .phone { max-width: 180px; transform: none; animation: none; }

.site-footer { padding: 34px 0 18px; background: #05060d; color: #c9d4e8; }
.footer-shell { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.footer-shell .brand strong { color: #fff; }
.footer-shell nav { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; font-weight: 800; }
.footer-shell nav a:hover { color: var(--violet); }
.copy { width: min(calc(100% - 40px), var(--content)); margin: 14px auto 0; color: #6f7694; font-size: 12px; }

.back-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 60; width: 46px; height: 46px;
  display: grid; place-items: center; visibility: hidden; opacity: 0;
  background: var(--violet); box-shadow: var(--nav-shadow);
}
.back-top::before {
  content: ""; width: 12px; height: 12px;
  border-left: 2px solid #fff; border-top: 2px solid #fff;
  transform: translateY(3px) rotate(45deg);
}
.back-top.is-visible { visibility: visible; opacity: 1; }

@keyframes drift {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -8px; }
}

@media (max-width: 980px) {
  .header-get { display: none; }
  .mobile-controls { display: flex; }
  .main-menu { position: fixed; top: var(--header-h); right: 0; left: 0; display: none; background: var(--void); }
  .main-menu.is-open { display: block; }
  .main-menu ul { flex-direction: column; gap: 0; padding: 8px 20px 16px; }
  .main-menu a { padding: 12px 0; }
  .opening { background: var(--void); }
  .opening-frame { display: flex; flex-direction: column; gap: 28px; min-height: 0; padding: 44px 0; }
  .opening-copy { text-align: center; }
  .opening-lead, .opening-action { margin-inline: auto; align-items: center; }
  .line-keys { justify-content: center; }
  .split { grid-template-columns: 1fr 1fr; }
  .phone.a, .phone.b { transform: none; }
  .spine::before { left: 18px; }
  .spine article { width: 100%; padding-left: 42px; }
  .spine .l, .spine .r { margin: 0 0 16px; }
  .spine .l::after, .spine .r::after { left: 13px; right: auto; }
  .cascade { grid-template-columns: 1fr 1fr; }
  .cascade figure:nth-child(n) { margin-top: 0; }
  .rift, .footer-shell { grid-template-columns: 1fr; }
  .rift-a { order: 2; }
  .rift-b { order: 1; }
  .opening-action a, .get-btn { width: 100%; }
  .rift-b .get-btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .phone, .spine article, .cascade figure, .node b { animation: none; transform: none !important; }
}