:root {
  --ink: #1d1d1f;
  --muted: #86868b;
  --paper: #ffffff;
  --bg: #f5f5f7;
  --line: rgba(0, 0, 0, 0.08);
  --blue: #0071e3;
  --blue-press: #0077ed;
  --gutter: clamp(28px, 5.2vw, 88px);
  --page: min(1440px, calc(100% - var(--gutter) * 2));
  --stage: min(1520px, calc(100% - var(--gutter) * 2));
  --safe: env(safe-area-inset-bottom, 0px);
  --font-display: "SF Pro Display", "Space Grotesk", -apple-system, BlinkMacSystemFont,
    "PingFang SC", "Noto Sans SC", "Helvetica Neue", Helvetica, sans-serif;
  --font-text: "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont,
    "PingFang SC", "Noto Sans SC", "Helvetica Neue", Helvetica, sans-serif;
  --pv-primary: #1677ff;
  --pv-primary-hover: #0958d9;
  --pv-bg-main: #ededed;
  --pv-bg-canvas: #ededed;
  --pv-bg-card: #f3f4f8;
  --pv-bg-sidebar: #c9cbd8;
  --pv-bg-hover: #d8dae6;
  --pv-bg-active: #e4e6ef;
  --pv-text-1: #3d3f4a;
  --pv-text-2: #5c5f6b;
  --pv-text-3: #6a6d7a;
  --pv-shadow: 8px 8px 16px #c8cad4, -8px -8px 16px #ffffff;
  --pv-shadow-in: inset 6px 6px 12px #c8cad4, inset -6px -6px 12px #ffffff;
  --pv-radius: 18px;
  --nav-width: 248px;
  --topbar-height: 56px;
  --font: var(--font-text);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.47059;
  letter-spacing: -0.022em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }

.wrap {
  width: var(--page);
  margin: 0 auto;
}
.nav-inner {
  width: var(--page);
  margin: 0 auto;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(245, 245, 247, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
}
.nav-logo img { width: 36px; height: 36px; object-fit: contain; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.nav-links a:hover { color: var(--ink); }
.nav-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 16px;
  border: 0;
  border-radius: 980px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: -0.01em;
  cursor: pointer;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-press); }
.btn-ghost { background: #e8e8ed; color: var(--ink); }
.btn-lg { height: 44px; padding: 0 22px; font-size: 17px; font-weight: 400; }

.hero { padding: 88px 0 44px; text-align: center; }
.hero h1, .hero .display {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(48px, 6.4vw, 80px);
  font-weight: 600;
  letter-spacing: -0.011em;
  line-height: 1.07143;
}
.hero .lead {
  margin: 0 auto 28px;
  max-width: 640px;
  color: var(--muted);
  font-size: 21px;
  font-weight: 400;
  line-height: 1.38105;
  letter-spacing: 0.011em;
}
.hero-btns { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

.stage-bleed {
  width: var(--stage);
  margin: 0 auto 72px;
  display: grid;
  grid-template-columns: minmax(0, 1.75fr) minmax(300px, 0.62fr);
  gap: 16px;
  align-items: stretch;
}
.pc-chrome, .phone-chrome {
  overflow: hidden;
  background: #e8e8ed;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.1);
}
.pc-chrome { border-radius: 22px; }
.phone-chrome {
  border-radius: 36px;
  padding: 10px 10px 16px;
  background: #1d1d1f;
}
.chrome-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px 8px;
  color: var(--muted);
  font-size: 12px;
}
.phone-chrome .chrome-bar { color: #a1a1a6; }
.chrome-bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d2d2d7;
  display: inline-block;
}
.pc-frame, .phone-frame { width: 100%; border: 0; background: var(--pv-bg-main); }
.pc-frame { height: min(78vh, 820px); }
.phone-frame { height: min(78vh, 820px); border-radius: 24px; }

.chapter { padding: 80px 0 8px; }
.kicker {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.011em;
  line-height: 1.19048;
}
.chapter h2, .mod h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 600;
  letter-spacing: -0.009em;
  line-height: 1.08349;
}
.chapter .sub, .mod .sub, .copy p {
  margin: 0 0 16px;
  max-width: 680px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.47059;
  letter-spacing: -0.022em;
}
.copy ul { margin: 0; padding: 0; list-style: none; }
.copy li {
  position: relative;
  margin: 8px 0;
  padding-left: 16px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.47059;
  letter-spacing: -0.022em;
}
.copy li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink);
}

.flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}
.step {
  min-height: 168px;
  padding: 22px 18px;
  border-radius: 22px;
  background: var(--paper);
}
.step em {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 12px;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.step b { display: block; margin-bottom: 8px; font-size: 19px; font-weight: 600; letter-spacing: 0.009em; }
.step span { color: var(--muted); font-size: 14px; line-height: 1.42859; letter-spacing: -0.016em; }

.feat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}
.tile {
  min-height: 138px;
  padding: 22px 20px;
  border-radius: 22px;
  background: var(--paper);
}
.tile b { display: block; margin-bottom: 8px; font-size: 19px; font-weight: 600; letter-spacing: 0.009em; }
.tile span { color: var(--muted); font-size: 14px; line-height: 1.42859; letter-spacing: -0.016em; }

.pair {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 16px;
  margin-top: 28px;
}
.dark {
  margin: 56px 0 0;
  padding: 84px 0;
  background: #000;
  color: #f5f5f7;
}
.dark h2 { color: #fff; }
.dark .sub, .dark p, .dark .tile span { color: #a1a1a6; }
.dark .tile { background: #111; }
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.mod { padding: 48px 0 64px; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.card {
  min-height: 110px;
  padding: 22px 20px;
  border-radius: 22px;
  background: var(--paper);
}
.card strong { display: block; margin-bottom: 8px; }
.card span { color: var(--muted); font-size: 14px; line-height: 1.42859; letter-spacing: -0.016em; }

.site-footer {
  padding: 56px 0 calc(40px + var(--safe));
  color: var(--muted);
  font-size: 12px;
  letter-spacing: -0.01em;
}
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; margin: 0 0 12px; }

body.product-frame {
  background: var(--pv-bg-canvas);
  color: var(--pv-text-1);
  overflow: hidden;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  letter-spacing: 0;
  line-height: 1.45;
}
.app-pc {
  display: grid;
  grid-template-columns: var(--nav-width) minmax(0, 1fr);
  width: 100%;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: #e6e7ee;
}
.pc-nav {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: #c9cbd8;
  box-shadow: 8px 0 18px rgba(80, 84, 104, 0.14), inset -4px 0 10px rgba(255, 255, 255, 0.32);
}
.pc-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: var(--topbar-height);
  padding: 9px 14px;
}
.pc-brand img {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  box-shadow: 6px 6px 12px #b8bee8, -4px -4px 10px #fff;
}
.pc-brand strong { display: block; font-size: 14px; }
.pc-brand small { color: var(--pv-text-3); font-size: 11px; }
.led {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 4px;
  border-radius: 50%;
  background: #16a34a;
}
.pc-menu { flex: 1; overflow: auto; padding: 8px; }
.pc-group { margin-bottom: 10px; }
.pc-group b {
  display: block;
  margin: 4px 8px 6px;
  color: var(--pv-text-3);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.pc-item, .pc-sub {
  display: block;
  width: 100%;
  min-height: 36px;
  margin: 0 0 2px;
  padding: 7px 10px;
  border: 0;
  border-radius: 14px;
  color: var(--pv-text-2);
  background: transparent;
  text-align: left;
  font-size: 13px;
}
.pc-item.active, .pc-sub.active {
  color: var(--pv-primary);
  font-weight: 700;
  background: var(--pv-bg-active);
  box-shadow: var(--pv-shadow-in);
}
.pc-sub { margin-left: 18px; font-size: 12.5px; }
.pc-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px 14px;
  color: var(--pv-text-3);
  font-size: 11px;
}
.pc-main { display: flex; flex-direction: column; min-width: 0; }
.pc-top {
  display: flex;
  align-items: center;
  min-height: var(--topbar-height);
  padding: 0 20px;
  color: var(--pv-text-2);
  font-size: 14px;
  font-weight: 700;
}
.wb { flex: 1; overflow: auto; padding: 12px 18px 28px; background: #ededed; }
.search { display: flex; gap: 8px; }
.search input {
  flex: 1;
  height: 44px;
  border: 0;
  border-radius: 16px;
  padding: 0 14px;
  background: var(--pv-bg-main);
  box-shadow: var(--pv-shadow-in);
}
.search button {
  height: 44px;
  border: 0;
  border-radius: 16px;
  padding: 0 18px;
  background: var(--pv-primary);
  color: #fff;
  font-weight: 800;
}
.duo, .grid4, .grid3 { display: grid; gap: 10px; margin-top: 16px; }
.duo { grid-template-columns: 1fr 1fr; }
.grid4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.st { font-weight: 700; font-size: 13px; }
.st.in { color: #128a3e; }
.st.out { color: #d92d20; }
.open-plats {
  margin-top: 14px;
  height: 40px;
  border: 0;
  border-radius: 12px;
  padding: 0 16px;
  background: #1677ff;
  color: #fff;
  font-weight: 700;
}
.tile-soft, .mini {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 82px;
  padding: 14px;
  border: 0;
  border-radius: 20px;
  text-align: left;
  background: var(--pv-bg-card);
  box-shadow: var(--pv-shadow);
}
.tile-soft strong, .mini strong { font-size: 15px; color: var(--pv-text-1); }
.tile-soft span, .mini span { color: var(--pv-text-3); font-size: 12px; }
.sec { margin-top: 24px; }
.sec h2 { margin: 0; font-size: 16px; color: var(--pv-text-1); }

.app-phone {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  background: #f5f6f8;
  color: #191919;
}
.moc-h {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 10px;
  background: #1677ff;
  color: #fff;
}
.moc-h h1 { margin: 0; font-size: 17px; font-weight: 650; }
.moc-h p { margin: 2px 0 0; font-size: 11px; opacity: 0.86; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: #34c759; }
.moc-body { flex: 1; overflow: auto; padding-bottom: 76px; }
.pc-card {
  margin: 12px;
  padding: 14px;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(25, 25, 25, 0.06);
}
.pc-card strong { display: block; }
.pc-card p { margin: 6px 0 0; color: #8a8a8a; font-size: 12px; }
.quick { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 0 12px; }
.quick b {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  border-radius: 14px;
  background: #fff;
  font-size: 12px;
  font-weight: 650;
}
.list { margin: 12px; padding: 0; list-style: none; background: #fff; border-radius: 18px; }
.list li {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 12px 14px;
  border-bottom: 0.5px solid rgba(25, 25, 25, 0.06);
}
.list li:last-child { border-bottom: 0; }
.chip {
  flex: 0 0 auto;
  padding: 2px 8px;
  border-radius: 999px;
  background: #e8f2ff;
  color: #0d84ff;
  font-size: 11px;
}
.phone-tab {
  position: sticky;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: 64px;
  background: rgba(255, 255, 255, 0.94);
  border-top: 0.5px solid rgba(25, 25, 25, 0.06);
}
.phone-tab span {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #8a8a8a;
  font-size: 11px;
  font-weight: 650;
}
.phone-tab span.on { color: #0d84ff; }

@media (max-width: 1180px) {
  .flow { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .feat-grid, .grid4, .grid3, .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split, .pair { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .stage-bleed { grid-template-columns: 1fr; }
  .pc-chrome { display: none; }
  .phone-chrome { max-width: 420px; margin: 0 auto; }
  .flow, .card-grid, .grid3 { grid-template-columns: 1fr 1fr; }
  .hero { padding: 40px 0 16px; }
  .chapter { padding-top: 48px; }
}
@media (max-width: 640px) {
  :root { --gutter: 22px; }
  .flow, .feat-grid, .card-grid, .grid3 { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 28px; }
  .hero h1, .hero .display { font-size: 32px; letter-spacing: 0.004em; }
  .hero .lead { font-size: 17px; letter-spacing: -0.022em; }
  .nav-links { display: none; }
}