/* ===== 基础变量与重置 ===== */
:root {
  --cream: #FAF6F0;
  --cream-deep: #F2EBE0;
  --blush: #F5B7B1;
  --blush-soft: #F9D5D1;
  --blush-deep: #E8A099;
  --mint: #A8D5BA;
  --mint-soft: #C5E4D0;
  --peach: #F4A261;
  --peach-soft: #F8C19A;
  --lavender: #B8A9C9;
  --brown: #3D2C2C;
  --brown-light: #5C4545;
  --brown-muted: #8B7373;
  --white: #FFFFFF;
  --shadow-sm: 0 2px 8px rgba(61, 44, 44, 0.06);
  --shadow-md: 0 8px 24px rgba(61, 44, 44, 0.08);
  --shadow-lg: 0 16px 48px rgba(61, 44, 44, 0.12);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;
  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--brown);
  background: var(--cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ===== 导航栏 ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all 0.3s ease;
}

.nav.scrolled {
  background: rgba(250, 246, 240, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  padding: 12px 0;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--brown);
}

.logo-icon {
  width: 36px;
  height: 36px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--brown-light);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--brown);
}

.nav-cta {
  background: var(--brown);
  color: var(--cream) !important;
  padding: 10px 22px;
  border-radius: 100px;
  transition: all 0.2s !important;
}

.nav-cta:hover {
  background: var(--brown-light);
  transform: translateY(-1px);
}

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.blob-1 {
  width: 500px;
  height: 500px;
  background: var(--blush-soft);
  top: -100px;
  right: -100px;
}

.blob-2 {
  width: 400px;
  height: 400px;
  background: var(--mint-soft);
  bottom: -100px;
  left: -50px;
}

.blob-3 {
  width: 300px;
  height: 300px;
  background: var(--peach-soft);
  top: 40%;
  left: 30%;
  opacity: 0.2;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--brown-light);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--mint);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--brown);
  margin-bottom: 20px;
  text-wrap: pretty;
}

.title-accent {
  color: var(--blush-deep);
  position: relative;
}

.title-accent::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--blush-soft);
  opacity: 0.5;
  z-index: -1;
  border-radius: 4px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--brown-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}

.desktop-only {
  display: inline;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.btn-icon {
  width: 20px;
  height: 20px;
}

.btn-primary {
  background: var(--brown);
  color: var(--cream);
}

.btn-primary:hover {
  background: var(--brown-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--white);
  color: var(--brown);
  border: 1.5px solid var(--cream-deep);
}

.btn-secondary:hover {
  border-color: var(--blush);
  color: var(--blush-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
}

.stat-item {
  text-align: left;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 600;
  color: var(--brown);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--brown-muted);
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--cream-deep);
}

/* Hero 视觉 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.phone-frame {
  width: 280px;
  height: 560px;
  background: var(--brown);
  border-radius: 40px;
  padding: 12px;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(61, 44, 44, 0.1);
  position: relative;
}

.phone-notch {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 28px;
  background: var(--brown);
  border-radius: 0 0 16px 16px;
  z-index: 2;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--cream);
  border-radius: 30px;
  overflow: hidden;
}

.screen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 40px 16px 12px;
  background: var(--white);
  border-bottom: 1px solid var(--cream-deep);
}

.screen-time {
  font-size: 11px;
  color: var(--brown-muted);
  font-weight: 500;
}

.screen-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--brown);
  font-family: var(--font-serif);
}

.screen-menu {
  font-size: 18px;
  color: var(--brown-muted);
  font-weight: 700;
}

.timeline-demo {
  padding: 16px;
  overflow-y: auto;
  height: calc(100% - 60px);
}

.tl-month {
  font-size: 11px;
  font-weight: 600;
  color: var(--blush-deep);
  margin-bottom: 10px;
  margin-top: 8px;
  font-family: var(--font-serif);
}

.tl-month:first-child {
  margin-top: 0;
}

.tl-photos {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 8px;
}

.tl-photo {
  aspect-ratio: 1;
  border-radius: 10px;
  background-size: cover;
  background-position: center;
}

.tl-photo-1 {
  background-image: url('images/download.jpg');
}

.tl-photo-2 {
  background-image: url('images/scene1.jpg');
}

.tl-photo-3 {
  background-image: url('images/scene3.jpg');
}

.tl-photo-4 {
  background-image: url('images/feature1.jpg');
}

.tl-photo-5 {
  background-image: url('images/scene2.jpg');
}

.tl-photo-6 {
  background-image: url('images/scene1.jpg');
  grid-column: span 2;
}

.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--white);
  padding: 12px 16px;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  animation: float 3s ease-in-out infinite;
}

.card-left {
  top: 120px;
  left: -20px;
  animation-delay: 0.5s;
}

.card-right {
  bottom: 140px;
  right: -20px;
  animation-delay: 1s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.ai-icon {
  background: #FFF0E5;
  color: var(--peach);
}

.ai-icon svg {
  width: 22px;
  height: 22px;
}

.family-icon {
  background: #E8F5EE;
  color: #5BAE87;
}

.family-icon svg {
  width: 22px;
  height: 22px;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--brown);
}

.card-desc {
  font-size: 12px;
  color: var(--brown-muted);
}

/* ===== 通用区块标题 ===== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--blush-deep);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 42px;
  font-weight: 600;
  line-height: 1.25;
  color: var(--brown);
  margin-bottom: 16px;
  text-wrap: pretty;
}

.section-desc {
  font-size: 17px;
  color: var(--brown-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 功能特性 ===== */
.features {
  padding: 120px 0;
  background: var(--white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--cream);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: all 0.3s ease;
}

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

.feature-large {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px;
}

.feature-reverse .feature-visual {
  order: 2;
}

.feature-reverse .feature-content {
  order: 1;
}

.feature-visual {
  position: relative;
}

.feature-img-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.feature-img {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.6s ease;
}

.feature-card:hover .feature-img {
  transform: scale(1.04);
}

.feature-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.95);
  padding: 8px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--blush-deep);
  backdrop-filter: blur(10px);
}

.feature-badge svg {
  width: 14px;
  height: 14px;
}

.feature-num {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--blush-deep);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 600;
  color: var(--brown);
  margin-bottom: 16px;
}

.feature-desc {
  font-size: 16px;
  color: var(--brown-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-points {
  list-style: none;
}

.feature-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 15px;
  color: var(--brown-light);
}

.point-dot {
  width: 6px;
  height: 6px;
  background: var(--mint);
  border-radius: 50%;
  flex-shrink: 0;
}

.feature-num-small {
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 600;
  color: var(--blush-deep);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.feature-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon-wrap svg {
  width: 28px;
  height: 28px;
}

.icon-pink {
  background: #FCE4E1;
  color: var(--blush-deep);
}

.icon-green {
  background: #E5F3EB;
  color: #5BAE87;
}

.icon-purple {
  background: #EDE7F3;
  color: #9B8BB8;
}

.icon-orange {
  background: #FDE5D0;
  color: #E08A4A;
}

.feature-title-sm {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--brown);
  margin-bottom: 12px;
}

.feature-desc-sm {
  font-size: 15px;
  color: var(--brown-muted);
  line-height: 1.7;
}

.timeline-preview {
  display: flex;
  align-items: flex-end;
  gap: 0;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px dashed var(--cream-deep);
}

.tp-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
}

.tp-item::before {
  content: '';
  position: absolute;
  top: -24px;
  left: 50%;
  width: 100%;
  height: 2px;
  background: var(--cream-deep);
}

.tp-item:first-child::before {
  left: 50%;
  width: 50%;
}

.tp-item:last-child::before {
  width: 50%;
}

.tp-age {
  font-size: 12px;
  font-weight: 600;
  color: var(--brown-muted);
  font-family: var(--font-serif);
}

.tp-dot {
  width: 10px;
  height: 10px;
  background: var(--cream-deep);
  border-radius: 50%;
  border: 2px solid var(--cream);
  position: relative;
  z-index: 1;
}

.tp-dot-active {
  background: var(--blush);
  box-shadow: 0 0 0 4px rgba(245, 183, 177, 0.3);
}

.tp-label {
  font-size: 12px;
  color: var(--brown-light);
  font-weight: 500;
}

/* ===== 使用场景 ===== */
.scenarios {
  padding: 120px 0;
  background: var(--cream);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scene-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.scene-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.scene-img {
  aspect-ratio: 4/3;
  background-size: cover;
  background-position: center;
}

.scene-content {
  padding: 28px;
}

.scene-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--brown);
  margin-bottom: 12px;
}

.scene-desc {
  font-size: 15px;
  color: var(--brown-muted);
  line-height: 1.7;
}

/* ===== 隐私安全 ===== */
.privacy {
  padding: 120px 0;
  background: linear-gradient(135deg, #3D2C2C 0%, #5C4545 100%);
  position: relative;
  overflow: hidden;
}

.privacy::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(168, 213, 186, 0.1) 0%, transparent 70%);
  top: -200px;
  right: -100px;
  pointer-events: none;
}

.privacy::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 183, 177, 0.08) 0%, transparent 70%);
  bottom: -100px;
  left: -50px;
  pointer-events: none;
}

.privacy-wrap {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.eyebrow-light {
  color: var(--mint);
}

.title-light {
  color: var(--cream);
}

.desc-light {
  color: rgba(250, 246, 240, 0.7);
}

.section-header .desc-light {
  margin-left: 0;
}

.privacy-content .section-header {
  text-align: left;
  margin-bottom: 40px;
}

.privacy-content .section-desc {
  margin-left: 0;
}

.privacy-features {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.privacy-item {
  display: flex;
  gap: 18px;
  padding: 24px;
  background: rgba(250, 246, 240, 0.05);
  border: 1px solid rgba(250, 246, 240, 0.1);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.privacy-item:hover {
  background: rgba(250, 246, 240, 0.08);
  border-color: rgba(250, 246, 240, 0.15);
}

.privacy-icon {
  width: 48px;
  height: 48px;
  background: rgba(168, 213, 186, 0.15);
  color: var(--mint);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.privacy-icon svg {
  width: 24px;
  height: 24px;
}

.privacy-text h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 6px;
  font-family: var(--font-serif);
}

.privacy-text p {
  font-size: 14px;
  color: rgba(250, 246, 240, 0.6);
  line-height: 1.6;
}

.privacy-visual {
  display: flex;
  justify-content: center;
}

.shield-illustration {
  position: relative;
  width: 320px;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.shield-svg {
  width: 240px;
  height: auto;
}

.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(250, 246, 240, 0.95);
  backdrop-filter: blur(10px);
  animation: float 3.5s ease-in-out infinite;
}

.badge-lock {
  top: 40px;
  right: 0;
  color: var(--blush-deep);
  animation-delay: 0.5s;
}

.badge-lock svg {
  width: 18px;
  height: 18px;
}

.badge-local {
  bottom: 60px;
  left: 0;
  color: #5BAE87;
  animation-delay: 1s;
}

.badge-local svg {
  width: 18px;
  height: 18px;
}

/* ===== 下载区域 ===== */
.download {
  padding: 100px 0;
  background: var(--cream);
}

.download-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  position: relative;
}

.download-card::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 183, 177, 0.15) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  pointer-events: none;
}

.download-title {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--brown);
  margin-bottom: 16px;
  text-wrap: pretty;
}

.download-desc {
  font-size: 17px;
  color: var(--brown-muted);
  margin-bottom: 36px;
}

.download-buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 28px;
  background: var(--brown);
  color: var(--cream);
  border-radius: 14px;
  width: fit-content;
  transition: all 0.25s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.download-icon {
  width: 28px;
  height: 28px;
}

.download-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.download-sub {
  font-size: 11px;
  opacity: 0.7;
  letter-spacing: 0.5px;
}

.download-platform {
  font-size: 18px;
  font-weight: 600;
}

.download-android {
  background: transparent;
  border: 2px solid var(--cream-deep);
  color: var(--brown);
}

.download-android:hover {
  border-color: var(--brown);
}

.qr-hint {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--brown-muted);
}

.qr-hint svg {
  width: 20px;
  height: 20px;
}

.download-visual {
  display: flex;
  justify-content: center;
}

.hero-baby-img {
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  background-image: url('images/download.jpg');
}

.hero-baby-img::before {
  content: '';
  position: absolute;
  inset: -16px;
  border: 2px dashed var(--blush-soft);
  border-radius: 50%;
  animation: rotate 30s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===== 页脚 ===== */
.footer {
  background: var(--brown);
  color: rgba(250, 246, 240, 0.7);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 280px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 16px;
}

.footer-logo .logo-icon {
  width: 36px;
  height: 36px;
}

.footer-logo .logo-icon path,
.footer-logo .logo-icon circle {
  stroke: var(--cream) !important;
}

.footer-tagline {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(250, 246, 240, 0.6);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 20px;
  font-family: var(--font-serif);
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(250, 246, 240, 0.6);
  padding: 6px 0;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--cream);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid rgba(250, 246, 240, 0.1);
  font-size: 13px;
}

.footer-copy {
  color: rgba(250, 246, 240, 0.5);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-links a {
  color: rgba(250, 246, 240, 0.5);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--cream);
}

.footer-sep {
  color: rgba(250, 246, 240, 0.3);
}

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 60px;
  }

  .hero-badge {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-title {
    font-size: 42px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .feature-large {
    grid-column: span 1;
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-reverse .feature-visual {
    order: 0;
  }

  .feature-reverse .feature-content {
    order: 0;
  }

  .scenarios-grid {
    grid-template-columns: 1fr;
  }

  .privacy-wrap {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .privacy-content .section-header {
    text-align: center;
  }

  .privacy-content .section-desc {
    margin: 0 auto;
  }

  .download-card {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 48px 32px;
  }

  .download-btn {
    margin: 0 auto;
  }

  .qr-hint {
    justify-content: center;
  }

  .hero-baby-img {
    width: 280px;
    height: 280px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: span 2;
    max-width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .desktop-only {
    display: none;
  }
}

@media (max-width: 640px) {
  .section-inner {
    padding: 0 20px;
  }

  .nav-inner {
    padding: 0 20px;
  }

  .nav-links a:not(.nav-cta) {
    display: none;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero-title {
    font-size: 34px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
    max-width: 280px;
  }

  .hero-stats {
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
  }

  .stat-divider {
    display: none;
  }

  .section-title {
    font-size: 32px;
  }

  .features, .scenarios, .privacy, .download {
    padding: 80px 0;
  }

  .feature-large {
    padding: 32px 24px;
  }

  .download-title {
    font-size: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: span 1;
  }

  .phone-frame {
    width: 240px;
    height: 480px;
  }
}