:root {
  --brand-primary: #d93f6a;
  --brand-primary-light: #f28ca6;
  --bg-main: #FAE0DB;
  --bg-warm: #faddd5;
  --trust-blue: #5dade2;
  --accent-orange: #f8c471;
  --mist-pink: #fadadd;
  --text-body: #333333;
  --text-muted: #666666;
  --white: #ffffff;
  --gray-light: #f5f5f5;
  --primary-hover: #c2355a;
  --ivory: var(--bg-main);
  --latte: var(--bg-warm);
  --blush: var(--brand-primary-light);
  --primary: var(--brand-primary);
  --primary-soft: rgba(242, 140, 166, 0.28);
  --text: var(--text-body);
  --muted: var(--text-muted);
  --line: var(--mist-pink);
  --card: var(--white);
  --shadow: 0 10px 24px rgba(217, 63, 106, 0.1);
  --shadow-hover: 0 14px 28px rgba(217, 63, 106, 0.16);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(
    180deg,
    #fff9fb 0%,
    var(--bg-main) 42%,
    var(--bg-warm) 100%
  );
  line-height: 1.65;
  letter-spacing: 0.2px;
}

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

.wrap {
  width: min(1360px, calc(100% - 44px));
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.bg-lines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.bg-lines span {
  position: absolute;
  border: 1px solid rgba(217, 63, 106, 0.22);
  border-radius: 999px;
  animation: drift 18s ease-in-out infinite;
}

.bg-lines span:nth-child(1) {
  width: 360px;
  height: 360px;
  top: -120px;
  right: -70px;
}

.bg-lines span:nth-child(2) {
  width: 220px;
  height: 220px;
  top: 43%;
  left: -110px;
  animation-duration: 23s;
  animation-delay: -6s;
}

.bg-lines span:nth-child(3) {
  width: 300px;
  height: 300px;
  bottom: -120px;
  right: 8%;
  animation-duration: 26s;
  animation-delay: -3s;
}

@keyframes drift {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.6; }
  50% { transform: translateY(-10px) scale(1.03); opacity: 0.85; }
}

header {
  padding: 18px 0 16px;
  position: relative;
  z-index: 3;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 27px;
  color: var(--brand-primary);
}

.logo-mark {
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--primary);
  border-radius: 5px 11px 11px 11px;
  transform: rotate(45deg);
  animation: breathe 7s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { transform: rotate(45deg) scale(1); }
  50% { transform: rotate(45deg) scale(1.05); }
}

.top-ref {
  position: relative;
  min-height: 600px;
  background: url("https://xwqianqian.oss-cn-chengdu.aliyuncs.com/love-file/20260430/ae5a8c76228e49e2bba68fe5b9e99e42.png") center top / cover no-repeat;
  border-bottom: 1px solid var(--mist-pink);
  overflow: hidden;
}

.top-ref-inner {
  position: relative;
  min-height: 420px;
}

.qr-card {
  position: absolute;
  right: -255px;
  top: 257px;
  width: 226px;
  height: 250px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--mist-pink);
  box-shadow: 0 10px 24px rgba(217, 63, 106, 0.14);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  z-index: 4;
  backdrop-filter: blur(2px);
}

.qr-box {
  width: 184px;
  height: 184px;
  background: #fff;
  border: 5px solid #fff;
  border-radius: 2px;
  box-shadow: inset 0 0 0 1px #1f1f1f;
  position: relative;
  overflow: hidden;
}

.qr-box img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-card span {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1;
}

.hero {
  padding: 22px 0 72px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 30px;
  align-items: center;
}

.line {
  width: 90px;
  height: 1px;
  background: var(--line);
  margin-bottom: 20px;
  transform-origin: left;
  animation: lineflow 6s ease-in-out infinite;
}

@keyframes lineflow {
  0%, 100% { transform: scaleX(0.7); opacity: 0.5; }
  50% { transform: scaleX(1); opacity: 1; }
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.13;
  max-width: 13em;
  color: var(--brand-primary);
}

.hero p {
  margin: 20px 0 0;
  max-width: 35em;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  height: 46px;
  border-radius: 13px;
  border: 1px solid transparent;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color .25s ease, border-radius .25s ease, color .25s ease;
  font-size: 14px;
  cursor: pointer;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
}

.btn.primary:hover {
  background: var(--primary-hover);
  border-radius: 16px;
}

.btn.ghost {
  border-color: var(--primary);
  color: var(--brand-primary);
  background: transparent;
}

.btn.ghost:hover {
  background: var(--primary-soft);
  border-radius: 16px;
}

.hero-side {
  display: grid;
  gap: 14px;
}

.scene-card {
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  background: var(--card);
  border: 1px solid var(--mist-pink);
  transition: transform .35s ease, box-shadow .35s ease;
  position: relative;
  overflow: hidden;
}

.scene-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 20%, rgba(255,255,255,0.22), transparent 80%);
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}

.scene-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.scene-card:hover::after {
  opacity: 1;
}

.scene-img {
  height: 140px;
  border-radius: 14px;
  margin-bottom: 10px;
  border: 1px solid var(--mist-pink);
  position: relative;
  overflow: hidden;
}

.city-corner {
  background:
    linear-gradient(to top, #f28ca6 0 28%, transparent 28%),
    linear-gradient(115deg, #faddd5 0%, #fff5f7 45%, #f28ca6 100%);
}

.city-corner::before,
.city-corner::after {
  content: "";
  position: absolute;
  bottom: 28%;
  background: rgba(217, 63, 106, 0.2);
}

.city-corner::before {
  left: 16%;
  width: 46px;
  height: 64px;
}

.city-corner::after {
  left: 42%;
  width: 62px;
  height: 88px;
}

.cafe-evening {
  background:
    linear-gradient(to top, #f8c471 0 30%, transparent 30%),
    radial-gradient(circle at 72% 35%, rgba(255, 255, 255, 0.75) 0 16%, transparent 17%),
    linear-gradient(130deg, #fde8ec 0%, #f28ca6 100%);
}

.night-view {
  background:
    linear-gradient(to top, #b82e55 0 26%, transparent 26%),
    radial-gradient(circle at 24% 38%, rgba(253, 232, 236, 0.45) 0 12%, transparent 13%),
    linear-gradient(130deg, #f28ca6 0%, #d93f6a 42%, #fadadd 100%);
}

.commute {
  background:
    linear-gradient(to top, #f28ca6 0 25%, transparent 25%),
    linear-gradient(135deg, #fde8ec 0 48%, #faddd5 100%);
}

.scene-tag {
  color: var(--text-muted);
  font-size: 13px;
}

.scene-title {
  margin-top: 4px;
  font-size: 18px;
  color: var(--text-body);
}

.section {
  padding: 34px 0;
}

.split {
  display: grid;
  gap: 20px;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
}

.intro h2, .trust h2, .steps h2, .privacy h2, .feature-heading h2 {
  margin: 0;
  font-size: clamp(27px, 4vw, 39px);
  line-height: 1.2;
  color: var(--text-body);
}

.feature-heading {
  margin-bottom: 28px;
  max-width: 40em;
}

.intro p, .trust p, .steps p, .privacy p {
  color: var(--muted);
  max-width: 38em;
  margin-top: 16px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 42px;
  align-items: start;
}

.feature-col {
  display: grid;
  gap: 60px;
  align-content: start;
}

.feature-col.right {
  margin-top: 180px;
}

.feature-card {
  max-width: 100%;
  margin-top: 30px;
  background: transparent;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-items: start;
}

.feature-head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 0;
}

.feature-index {
  font-size: 56px;
  line-height: .85;
  font-weight: 700;
  color: rgba(242, 140, 166, 0.65);
  letter-spacing: 1px;
  min-width: 56px;
}

.feature-copy h3 {
  margin: 0;
  font-size: 22px;
  color: var(--text-body);
  line-height: 1.2;
}

.feature-copy p {
  margin: 5px 0 0;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.feature-visual {
  height: 288px;
  border-radius: 10px;
  border: 1px solid var(--mist-pink);
  box-shadow: 0 12px 26px rgba(217, 63, 106, 0.12);
  position: relative;
  overflow: hidden;
  transition: transform .35s ease, box-shadow .35s ease;
}

.feature-card:hover .feature-visual {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px rgba(217, 63, 106, 0.18);
}

.feature-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.34), transparent 72%);
  pointer-events: none;
}

.feature-visual.v1 {
  background: url("https://xwqianqian.oss-cn-chengdu.aliyuncs.com/love-file/20260430/bed09a0a8a9b48769d855e5745083388.png") center / cover no-repeat;
}

.feature-visual.v1::after {
  display: none;
}

.feature-visual.v2 {
  background: url("https://xwqianqian.oss-cn-chengdu.aliyuncs.com/love-file/20260430/32fbbb9242fd432ab7fe4a1973c26fae.png") center / cover no-repeat;
}

.feature-visual.v2::after {
  display: none;
}

.feature-visual.v3 {
  background: url("https://xwqianqian.oss-cn-chengdu.aliyuncs.com/love-file/20260430/f77ceb4032e248c5afbdf9917e5dc4d4.png") center / cover no-repeat;
}

.feature-visual.v3::after {
  display: none;
}

.feature-visual.v4 {
  background: url("https://xwqianqian.oss-cn-chengdu.aliyuncs.com/love-file/20260430/3bcce85a38094598a3ef2afb9c829593.png") center / cover no-repeat;
}

.feature-visual.v4::after {
  display: none;
}

.feature-visual.v5 {
  background: url("https://xwqianqian.oss-cn-chengdu.aliyuncs.com/love-file/20260430/d1707d9dbe8d421eb7adfc9f34e411a4.png") center / cover no-repeat;
}

.feature-visual.v5::after {
  display: none;
}

.feature-visual.v6 {
  background: url("https://xwqianqian.oss-cn-chengdu.aliyuncs.com/love-file/20260430/39d0985c7d334df492cdb9fad7608aa6.png") center / cover no-repeat;
}

.feature-visual.v6::after {
  display: none;
}

.feature-card.reveal {
  transform: translateX(-22px);
}

.feature-card.right.reveal {
  transform: translateX(22px);
}

.feature-card.reveal.inview {
  transform: translateX(0);
}

#cityPanel {
  position: relative;
}

#cityPanel .trust {
  max-width: 52em;
  padding-bottom: 6px;
  padding-top: 30px;
}

.app-stack-scroll {
  margin-top: 8px;
  position: relative;
}

.app-stack-pin {
  position: relative;
  width: 100%;
  max-width: 100vw;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  justify-content: center;
  align-items: stretch;
  background: var(--ivory);
}

.app-stack-stage {
  position: relative;
  width: min(920px, 100%);
  min-height: min(72vh, 720px);
  margin-left: auto;
  margin-right: auto;
  padding-top: 8px;
  overflow: visible;
}

.app-stack-stage .app-shot {
  position: absolute;
  left: 50%;
  top: 0;
  width: min(314px, calc(100vw - 32px));
  aspect-ratio: 314 / 667;
  margin: 0;
  border-radius: 16px;
  border: 1px solid var(--mist-pink);
  background: var(--white);
  box-shadow: var(--shadow);
  overflow: hidden;
  will-change: transform;
}

.app-stack-stage .app-shot:nth-child(1) { z-index: 1; }
.app-stack-stage .app-shot:nth-child(2) { z-index: 2; }
.app-stack-stage .app-shot:nth-child(3) { z-index: 3; }
.app-stack-stage .app-shot:nth-child(4) { z-index: 4; }
.app-stack-stage .app-shot:nth-child(5) { z-index: 5; }
.app-stack-stage .app-shot:nth-child(6) { z-index: 6; }

.app-shot-img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.steps-flow {
  margin-top: 28px;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr .85fr 1.15fr;
  align-items: stretch;
}

.step {
  border: 1px solid var(--mist-pink);
  background: var(--white);
  border-radius: 16px;
  padding: 18px;
  position: relative;
  box-shadow: 0 6px 18px rgba(217, 63, 106, 0.08);
  transition: transform .35s ease, box-shadow .35s ease;
}

.step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.step small {
  color: var(--brand-primary);
  letter-spacing: 1px;
  font-weight: 600;
}

.step h3 {
  margin: 8px 0 6px;
  font-size: 19px;
  color: var(--text-body);
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

.step-line {
  position: absolute;
  top: 24px;
  right: -19px;
  width: 24px;
  border-top: 1px solid var(--brand-primary-light);
}

.privacy {
  background: var(--gray-light);
}

.privacy-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 20px;
  align-items: start;
}

.privacy-card {
  border: 1px solid var(--mist-pink);
  border-radius: 18px;
  background: var(--white);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform .35s ease, box-shadow .35s ease;
}

.privacy-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.privacy-card h3 {
  margin: 0 0 8px;
  color: var(--text-body);
}

.privacy-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 14px;
}

.cta {
  padding: 74px 0 88px;
}

.cta-box {
  border: 1px solid var(--mist-pink);
  border-radius: 20px;
  padding: 32px;
  background: linear-gradient(145deg, #ffffff 0%, #fde8ec 55%, #faddd5 100%);
  display: grid;
  gap: 16px;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  box-shadow: var(--shadow);
}

.cta h2 {
  margin: 0;
  font-size: 32px;
  color: var(--text-body);
}

.cta p {
  margin: 12px 0 0;
  color: var(--text-muted);
  max-width: 32em;
}

.kpi {
  border-left: 1px solid var(--mist-pink);
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 14px;
}

footer {
  border-top: 1px solid var(--mist-pink);
  padding: 28px 0 36px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 10px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .8s ease, transform .8s ease;
}

.reveal.inview {
  opacity: 1;
  transform: translateY(0);
}

#city .city-block.reveal {
  transform: none;
  transition: opacity 0.85s ease;
}

#city .city-block.reveal.inview {
  transform: none;
  opacity: 1;
}

.line-group .line-item {
  display: block;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .7s ease, transform .7s ease;
}

.line-group.inview .line-item {
  opacity: 1;
  transform: translateY(0);
}

.line-group.inview .line-item:nth-child(1) { transition-delay: .05s; }
.line-group.inview .line-item:nth-child(2) { transition-delay: .2s; }
.line-group.inview .line-item:nth-child(3) { transition-delay: .35s; }

@media (max-width: 980px) {
  .top-ref { min-height: 550px; }
  .top-ref-inner { min-height: 340px; }
  .qr-card { top: 58px; right: 8px; transform: scale(0.92); transform-origin: top right; }
  .hero { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; gap: 22px; }
  .feature-col { gap: 22px; }
  .feature-col.right { margin-top: 0; }
  .feature-card,
  .feature-card.right { grid-column: auto; margin-top: 0; }
  .feature-copy h3 { font-size: 22px; }
  .app-stack-stage { min-height: min(68vh, 640px); }
  .steps-flow { grid-template-columns: 1fr; }
  .step-line { display: none; }
  .privacy-grid { grid-template-columns: 1fr; }
  .cta-box { grid-template-columns: 1fr; }
  .kpi { border-left: none; border-top: 1px solid var(--mist-pink); padding: 14px 0 0; }
}

@media (max-width: 680px) {
  .top-ref { min-height: 280px; }
  .top-ref-inner { min-height: 280px; }
  .qr-card { top: 46px; right: 0; transform: scale(0.84); }
  .feature-index { font-size: 46px; min-width: 48px; }
  .feature-copy h3 { font-size: 20px; }
  .feature-copy p { font-size: 12px; }
  .feature-visual { height: 152px; }
  .section { padding: 62px 0; }
  .app-stack-stage { min-height: min(62vh, 560px); }
  .app-stack-stage .app-shot {
    width: min(375px, calc(100vw - 24px));
  }
}