:root {
  --bg: #f7f7fa;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --surface-dark: #0c1020;
  --surface-dark-strong: #11162b;
  --ink: #11131a;
  --muted: #5d6575;
  --muted-strong: #41495a;
  --line: rgba(17, 19, 26, 0.08);
  --line-strong: rgba(17, 19, 26, 0.14);
  --accent-gradient: linear-gradient(90deg, #ff5e3a 0%, #ff8a00 24%, #7a5cff 56%, #2a6dff 100%);
  --shadow: 0 32px 90px rgba(13, 17, 32, 0.08);
  --shadow-soft: 0 18px 44px rgba(13, 17, 32, 0.06);
  --section-width: min(1180px, calc(100vw - 48px));
  --display-font: "Alibaba Sans", "HarmonyOS Sans SC", "Segoe UI Variable Display", "PingFang SC", "Microsoft YaHei UI", sans-serif;
  --body-font: "Alibaba Sans", "HarmonyOS Sans SC", "Segoe UI Variable Text", "PingFang SC", "Microsoft YaHei UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(74, 126, 255, 0.08), transparent 24%),
    radial-gradient(circle at top right, rgba(255, 122, 89, 0.08), transparent 20%),
    linear-gradient(180deg, #fbfbfd 0%, #f7f7fa 48%, #f5f6f9 100%);
  font-family: var(--body-font);
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

.site-shell {
  min-height: 100vh;
}

.promo-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 10px 16px;
  background: linear-gradient(90deg, #101528 0%, #181632 50%, #181125 100%);
  color: rgba(255, 255, 255, 0.76);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.promo-bar strong {
  color: #ffffff;
  letter-spacing: 0.02em;
  text-transform: none;
}

.site-header,
.hero-section,
.section,
.site-footer {
  width: var(--section-width);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 14px;
  padding: 16px 22px;
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.76);
  backdrop-filter: blur(22px);
  box-shadow: 0 10px 28px rgba(25, 31, 52, 0.05);
  transition:
    transform 220ms ease,
    background-color 220ms ease,
    border-color 220ms ease,
    box-shadow 220ms ease;
}

.site-header.is-scrolled {
  transform: translateY(6px);
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(17, 19, 26, 0.06);
  box-shadow: 0 16px 40px rgba(16, 19, 34, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(180deg, #16233f 0%, #0f1220 100%);
  color: #ffffff;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-copy strong {
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
}

.brand-copy small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.2;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted-strong);
  font-size: 14px;
}

.site-nav a {
  position: relative;
  transition: color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.header-actions,
.hero-actions,
.cta-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.solid-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease;
}

.solid-button {
  color: #ffffff;
  background: #10131d;
  box-shadow: 0 16px 36px rgba(16, 19, 29, 0.16);
}

.ghost-button {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.ghost-button--light {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
}

.solid-button:hover,
.solid-button:focus-visible,
.ghost-button:hover,
.ghost-button:focus-visible {
  transform: translateY(-1px);
}

.hero-section {
  padding: 84px 0 34px;
}

.hero-copy {
  width: min(880px, 100%);
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  margin: 0 0 18px;
  color: #7a8bab;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.hero-copy h1,
.section-head h2,
.cta-copy h2 {
  margin: 0;
  font-family: var(--display-font);
  letter-spacing: -0.05em;
}

.hero-copy h1 {
  width: min(980px, 100%);
  margin: 0 auto;
  font-size: clamp(50px, 8.4vw, 92px);
  line-height: 0.95;
  font-weight: 760;
}

.hero-copy h1 span {
  display: block;
  width: fit-content;
  margin: 8px auto 0;
  white-space: nowrap;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-summary,
.section-head p,
.panel-copy p,
.proof-item p,
.cta-copy p,
.loop-list p,
.loop-side li,
.proof-band p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.hero-summary {
  width: min(620px, 100%);
  margin: 28px auto 0;
}

.hero-actions {
  justify-content: center;
  margin-top: 34px;
}

.hero-note {
  margin: 18px 0 0;
  color: #788195;
  font-size: 14px;
  line-height: 1.8;
}

.hero-stage {
  position: relative;
  margin: 72px auto 0;
  padding: 28px;
  border-radius: 36px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    linear-gradient(180deg, #101624 0%, #0d1120 100%);
  box-shadow: 0 40px 90px rgba(9, 13, 25, 0.18);
  overflow: hidden;
}

.hero-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 16%, rgba(255, 132, 100, 0.22), transparent 26%),
    radial-gradient(circle at 86% 18%, rgba(70, 118, 255, 0.22), transparent 22%);
}

.hero-stage__top,
.hero-stage__steps {
  position: relative;
  z-index: 1;
}

.hero-stage__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.hero-stage__top span,
.panel-copy > p,
.loop-side__eyebrow {
  color: rgba(255, 255, 255, 0.56);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.hero-stage__top strong {
  color: #ffffff;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-stage__canvas {
  position: relative;
  min-height: 590px;
}

.hero-shell,
.hero-dashboard,
.hero-phone {
  position: absolute;
}

.hero-shell {
  width: min(90%, 980px);
  top: 36px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.4;
}

.hero-dashboard {
  width: min(74%, 780px);
  bottom: 48px;
  left: 7%;
  border-radius: 28px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.3);
}

.hero-phone {
  border-radius: 30px;
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.34);
}

.hero-phone--front {
  width: min(24%, 260px);
  right: 11%;
  top: 34px;
  transform: rotate(7deg);
}

.hero-phone--middle {
  width: min(21%, 230px);
  right: 22%;
  bottom: 82px;
  transform: rotate(-8deg);
}

.hero-phone--back {
  width: min(19%, 214px);
  right: 1%;
  bottom: 44px;
  transform: rotate(10deg);
  opacity: 0.9;
}

.hero-stage__steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.hero-stage__steps span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 66px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  font-weight: 600;
}

.section {
  padding: 110px 0 0;
}

.section-head {
  width: min(820px, 100%);
  margin-bottom: 38px;
}

.product-section .section-head {
  width: min(980px, 100%);
}

.section-head h2,
.cta-copy h2 {
  font-size: clamp(38px, 5vw, 72px);
  line-height: 1.02;
  font-weight: 740;
}

.section-head p,
.cta-copy p {
  margin: 18px 0 0;
  width: min(760px, 100%);
}

.section-head--split {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.9fr);
  align-items: end;
  gap: 32px;
  width: 100%;
}

.section-head--split p:last-child {
  width: auto;
}

.product-switch {
  display: grid;
  grid-template-columns: minmax(240px, 320px) minmax(0, 1fr);
  gap: 38px;
}

.product-tabs {
  display: grid;
  gap: 8px;
}

.product-tab {
  display: grid;
  gap: 8px;
  width: 100%;
  padding: 22px 18px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.64);
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.product-tab:hover,
.product-tab:focus-visible {
  transform: translateY(-1px);
}

.product-tab span {
  color: #8992a4;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.product-tab strong {
  font-size: 19px;
  line-height: 1.2;
}

.product-tab small {
  color: var(--muted);
  font-size: 14px;
}

.product-tab.is-active {
  background: #ffffff;
  box-shadow: var(--shadow-soft);
}

.product-panel {
  display: none;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.98fr);
  gap: 30px;
  min-height: 560px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 34px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.product-panel.is-active {
  display: grid;
}

.panel-copy {
  align-self: center;
}

.panel-copy h3 {
  margin: 18px 0 0;
  font-size: clamp(34px, 4.2vw, 58px);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.panel-copy p {
  margin: 18px 0 0;
}

.panel-points {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.panel-points li {
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted-strong);
  font-size: 15px;
  line-height: 1.75;
}

.panel-visual,
.loop-side,
.cta-surface {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 127, 99, 0.2), transparent 24%),
    radial-gradient(circle at 82% 18%, rgba(72, 116, 255, 0.22), transparent 24%),
    linear-gradient(180deg, #101624 0%, #0d1120 100%);
}

.panel-visual {
  min-height: 492px;
}

.visual-glow,
.visual-dashboard,
.visual-phone,
.visual-connectors {
  position: absolute;
}

.visual-glow {
  inset: 36px 34px auto;
  width: calc(100% - 68px);
  opacity: 0.24;
}

.visual-dashboard {
  border-radius: 24px;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.28);
}

.visual-dashboard--small {
  width: 76%;
  left: 8%;
  bottom: 52px;
}

.visual-dashboard--wide {
  width: 90%;
  left: 5%;
  bottom: 36px;
}

.visual-phone {
  border-radius: 28px;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.34);
}

.panel-visual--assistant .visual-phone {
  width: min(42%, 240px);
  right: 10%;
  top: 42px;
  transform: rotate(7deg);
}

.visual-phone--left {
  width: min(41%, 238px);
  left: 16%;
  top: 54px;
  transform: rotate(-7deg);
}

.visual-phone--right {
  width: min(40%, 230px);
  right: 12%;
  bottom: 42px;
  transform: rotate(8deg);
}

.visual-connectors {
  width: 88%;
  left: 6%;
  top: 12%;
}

.loop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.92fr);
  gap: 34px;
}

.loop-list {
  display: grid;
  padding-top: 6px;
}

.loop-list article {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 22px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.loop-list article:last-child {
  border-bottom: 1px solid var(--line);
}

.loop-list span,
.proof-item span {
  color: #8992a4;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.loop-list h3,
.loop-side h3,
.proof-item h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.loop-list p,
.loop-side ul,
.proof-item p,
.proof-band p {
  margin: 12px 0 0;
}

.loop-side {
  padding: 34px;
  color: #ffffff;
  box-shadow: 0 34px 76px rgba(9, 13, 25, 0.18);
}

.loop-side h3 {
  margin-top: 18px;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.05;
}

.loop-side img {
  width: 100%;
  margin-top: 28px;
  border-radius: 22px;
}

.loop-side ul {
  display: grid;
  gap: 14px;
  margin-top: 26px;
  padding-left: 18px;
}

.loop-side li {
  color: rgba(255, 255, 255, 0.78);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.proof-item {
  min-height: 260px;
  padding: 28px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.56);
}

.proof-item h3 {
  margin-top: 18px;
}

.proof-item p {
  margin-top: 16px;
}

.proof-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 30px;
  border-radius: 30px;
  overflow: hidden;
  box-shadow: 0 34px 80px rgba(9, 13, 25, 0.14);
}

.proof-band > div {
  padding: 28px 30px;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 127, 99, 0.16), transparent 24%),
    radial-gradient(circle at 82% 18%, rgba(72, 116, 255, 0.18), transparent 24%),
    linear-gradient(180deg, #101624 0%, #0d1120 100%);
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.proof-band > div:first-child {
  border-left: none;
}

.proof-band strong {
  display: block;
  color: #ffffff;
  font-size: 21px;
  line-height: 1.2;
}

.proof-band p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
}

.cta-section {
  padding-bottom: 110px;
}

.cta-surface {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 28px;
  padding: 40px;
  box-shadow: 0 40px 90px rgba(9, 13, 25, 0.18);
}

.cta-copy h2,
.cta-copy p,
.proof-band strong,
.loop-side h3,
.loop-side__eyebrow {
  color: #ffffff;
}

.cta-copy p {
  color: rgba(255, 255, 255, 0.72);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 0 34px;
  color: #6d7382;
}

.footer-brand {
  display: grid;
  gap: 8px;
}

.footer-brand strong {
  color: var(--ink);
  font-size: 18px;
}

.footer-brand span {
  font-size: 13px;
  line-height: 1.7;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--ink);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 560ms ease,
    transform 560ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 1180px) {
  .site-nav {
    display: none;
  }

  .product-switch,
  .loop-grid,
  .section-head--split,
  .cta-surface,
  .product-panel,
  .proof-grid,
  .proof-band {
    grid-template-columns: 1fr;
  }

  .panel-visual {
    min-height: 460px;
  }
}

@media (max-width: 860px) {
  :root {
    --section-width: min(100vw - 28px, 1180px);
  }

  .promo-bar {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }

  .site-header {
    gap: 16px;
    padding: 14px 16px;
  }

  .header-actions {
    display: none;
  }

  .hero-section {
    padding-top: 56px;
  }

  .hero-stage {
    margin-top: 46px;
    padding: 18px;
    border-radius: 28px;
  }

  .hero-stage__top {
    align-items: start;
    flex-direction: column;
    margin-bottom: 18px;
  }

  .hero-stage__canvas {
    min-height: 420px;
  }

  .hero-dashboard {
    width: 82%;
    left: 4%;
    bottom: 26px;
  }

  .hero-phone--front {
    width: 34%;
    right: 7%;
    top: 16px;
  }

  .hero-phone--middle {
    width: 30%;
    right: 18%;
    bottom: 64px;
  }

  .hero-phone--back {
    width: 28%;
    right: -2%;
    bottom: 38px;
  }

  .hero-stage__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-tab {
    min-height: 124px;
  }

  .product-panel,
  .proof-band > div,
  .loop-side,
  .cta-surface {
    padding: 24px;
  }

  .panel-visual {
    min-height: 360px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  :root {
    --section-width: min(100vw - 20px, 1180px);
  }

  .solid-button,
  .ghost-button {
    width: 100%;
  }

  .hero-summary,
  .section-head p,
  .panel-copy p,
  .proof-item p,
  .cta-copy p,
  .loop-list p,
  .loop-side li,
  .proof-band p {
    font-size: 15px;
  }

  .hero-stage__canvas {
    min-height: 310px;
  }

  .hero-shell {
    width: 100%;
    top: 22px;
  }

  .hero-dashboard {
    width: 84%;
    left: 0;
    bottom: 14px;
  }

  .hero-phone--front {
    width: 38%;
    right: 3%;
  }

  .hero-phone--middle {
    width: 34%;
    right: 16%;
    bottom: 28px;
  }

  .hero-phone--back {
    display: none;
  }

  .hero-copy h1 span {
    white-space: normal;
  }

  .product-tabs {
    grid-template-columns: 1fr;
  }

  .panel-visual {
    min-height: 300px;
  }

  .panel-visual--assistant .visual-phone,
  .visual-phone--left,
  .visual-phone--right {
    width: 46%;
  }

  .proof-item {
    min-height: 0;
  }
}