:root {
  --color-primary: #FF7E8B;
  --color-primary-light: #FFB6C1;
  --color-primary-bg: #FFF5F5;
  --color-accent: #C9A7FF;
  --color-accent-light: #EDE4FF;
  --color-gold: #FFB347;
  --color-text: #4A4A4A;
  --color-text-light: #888888;
  --color-text-dark: #2D2D2D;
  --color-white: #FFFFFF;
  --color-bg: #FFFBFC;
  --color-card: #FFFFFF;
  --color-border: #F0E6E8;
  --max-width: 1200px;
  --nav-height: 70px;
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 30px;
  --shadow-sm: 0 2px 12px rgba(255, 126, 139, 0.08);
  --shadow-md: 0 8px 30px rgba(255, 126, 139, 0.12);
  --shadow-lg: 0 16px 48px rgba(255, 126, 139, 0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
/* 星星评论开始 */
.aiarticle-comment-rating-icon{
    display:inline-block !important;
    width:auto !important;
    height:auto !important;
    margin-right:2px;
    color:#ffb400 !important;
    font-style:normal !important;
    font-weight:normal !important;
    line-height:1 !important;
    vertical-align:middle;
    text-decoration:none !important;
}

.aiarticle-comment-rating-icon:before{
    font-family:Arial,"Segoe UI Symbol","Noto Sans Symbols","Microsoft YaHei",sans-serif !important;
    font-style:normal !important;
    font-weight:normal !important;
    line-height:1 !important;
}

.aiarticle-comment-rating-icon.fa-star:before{
    content:"\2605" !important;
}

.aiarticle-comment-rating-icon.fa-star-o:before{
    content:"\2606" !important;
}

.aiarticle-comment-rating-icon:last-child{
    margin-right:0;
}
/* 星星评论结束 */

a {
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  text-decoration: none;
  color: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

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

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 20px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-desc {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  will-change: transform;
}

.navbar.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.nav-logo img {
  width: 38px;
  height: 38px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links li {
  list-style: none;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width var(--transition);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-white) !important;
  padding: 8px 24px !important;
  border-radius: 25px;
  font-weight: 600 !important;
  font-size: 14px !important;
  transition: transform var(--transition), box-shadow var(--transition);
}

.nav-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 126, 139, 0.35);
}

.nav-download::after {
  display: none !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  width: 40px;
  height: 40px;
}

.nav-toggle img {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    height: calc(100vh - var(--nav-height));
    height: calc(100dvh - var(--nav-height));
    background: rgba(255, 255, 255, 0.98);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    flex-direction: column;
    justify-content: flex-start;
    padding: 36px 28px 120px;
    gap: 16px;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 999;
    box-shadow: -4px 0 30px rgba(0, 0, 0, 0.06);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav-links.active {
    transform: translateX(0);
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links a {
    font-size: 18px;
    display: block;
    padding: 8px 0;
  }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .nav-download {
    display: inline-flex;
    margin-left: auto;
    margin-right: 4px;
    padding: 8px 16px !important;
    font-size: 13px !important;
    border-radius: 20px;
    white-space: nowrap;
  }
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
  background: linear-gradient(180deg, #FFF5F5 0%, #FFF0F5 40%, #F8F0FF 100%);
}

.hero-bg-decor {
  position: absolute;
  border-radius: 50%;
  opacity: 0.4;
  pointer-events: none;
}

.hero-bg-decor-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 182, 193, 0.3), transparent 70%);
  top: -10%;
  right: -8%;
  animation: float 8s ease-in-out infinite;
}

.hero-bg-decor-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(201, 167, 255, 0.25), transparent 70%);
  bottom: 5%;
  left: -5%;
  animation: float 10s ease-in-out infinite reverse;
}

.hero-bg-decor-3 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 179, 71, 0.2), transparent 70%);
  top: 40%;
  left: 50%;
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1;
  max-width: 540px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 126, 139, 0.1);
  border: 1px solid rgba(255, 126, 139, 0.2);
  padding: 8px 20px;
  border-radius: 25px;
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 28px;
  animation: fadeInUp 0.6s ease-out;
}

.hero-badge img {
  width: 18px;
  height: 18px;
}

.hero-title {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  color: var(--color-text-dark);
  line-height: 1.2;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-title span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-weight: 800;
  color: var(--color-text-dark);
  line-height: 1.2;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease-out 0.15s both;
}

.hero-subtitle span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 36px;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-publish-time {
  display: inline-block;
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 35px;
  animation: fadeInUp 0.6s ease-out 0.25s both;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #FF6B7A);
  color: var(--color-white);
  box-shadow: 0 8px 24px rgba(255, 126, 139, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(255, 126, 139, 0.4);
}

.btn-outline {
  background: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-primary-light);
}

.btn-outline:hover {
  background: var(--color-primary-bg);
  transform: translateY(-3px);
}

.btn img {
  width: 22px;
  height: 22px;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.phone-mockup {
  width: 320px;
  background: var(--color-white);
  border-radius: 36px;
  padding: 16px;
  box-shadow: 0 30px 60px rgba(255, 126, 139, 0.2), 0 0 0 8px #FFE4E6;
  position: relative;
}

.phone-mockup::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 6px;
  background: #E8E8E8;
  border-radius: 3px;
}

.phone-screen {
  background: #FFFBFB;
  border-radius: 24px;
  padding: 20px 16px;
  min-height: 480px;
}

.phone-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.phone-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-avatar img {
  width: 24px;
  height: 24px;
}

.phone-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-dark);
}

.phone-status {
  font-size: 12px;
  color: #4CAF50;
}

.chat-bubble {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 18px;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.5;
  animation: bubbleIn 0.4s ease-out both;
}

.chat-bubble.ai {
  background: #FFF0F3;
  color: var(--color-text);
  border-bottom-left-radius: 6px;
  margin-right: auto;
}

.chat-bubble.user {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-white);
  border-bottom-right-radius: 6px;
  margin-left: auto;
  animation-delay: 0.6s;
}

.chat-bubble.ai:nth-child(3) { animation-delay: 1.2s; }
.chat-bubble.user:nth-child(4) { animation-delay: 1.8s; }
.chat-bubble.ai:nth-child(5) { animation-delay: 2.4s; }

@keyframes bubbleIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 12px 16px;
  background: #FFF0F3;
  border-radius: 18px;
  border-bottom-left-radius: 6px;
  max-width: 60px;
  margin-bottom: 12px;
  animation: bubbleIn 0.4s ease-out 3s both;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--color-primary-light);
  border-radius: 50%;
  animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

@media (max-width: 992px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
    padding-top: 60px;
    padding-bottom: 60px;
  }
  .hero-content {
    max-width: 100%;
  }
  .hero-buttons {
    justify-content: center;
  }
  .phone-mockup {
    width: 280px;
  }
  .phone-screen {
    min-height: 380px;
  }
}

.features {
  padding: 100px 0;
  background: var(--color-white);
  position: relative;
  overflow: hidden;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary-light), transparent);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 0;
  background: linear-gradient(180deg, rgba(255, 126, 139, 0.04), transparent);
  transition: height var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-card:hover::before {
  height: 100%;
}

.feature-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  background: var(--color-primary-bg);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(-5deg);
}

.feature-icon img {
  width: 40px;
  height: 40px;
}

.feature-card:nth-child(2) .feature-icon { background: #F5F0FF; }
.feature-card:nth-child(3) .feature-icon { background: #FFF8F0; }
.feature-card:nth-child(4) .feature-icon { background: #F0F8FF; }
.feature-card:nth-child(5) .feature-icon { background: #FFF0F5; }
.feature-card:nth-child(6) .feature-icon { background: #F5FFF5; }

.feature-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: 10px;
}

.feature-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.features-grid .feature-card:nth-child(4),
.features-grid .feature-card:nth-child(5),
.features-grid .feature-card:nth-child(6) {
  display: flex;
  flex-direction: row;
  text-align: left;
  align-items: center;
  gap: 20px;
  padding: 28px 32px;
}

.features-grid .feature-card:nth-child(4) .feature-icon,
.features-grid .feature-card:nth-child(5) .feature-icon,
.features-grid .feature-card:nth-child(6) .feature-icon {
  margin: 0;
  flex-shrink: 0;
}

@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  .features-grid .feature-card:nth-child(4),
  .features-grid .feature-card:nth-child(5),
  .features-grid .feature-card:nth-child(6) {
    flex-direction: column;
    text-align: center;
  }
}

.chat-showcase {
  padding: 100px 0;
  background: var(--color-primary-bg);
  position: relative;
}

.chat-showcase-grid {
  display: flex;
  gap: 40px;
  align-items: center;
}

.chat-showcase-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.chat-showcase-info {
  flex: 1;
  max-width: 480px;
}

.chat-showcase-info h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: 16px;
  line-height: 1.3;
}

.chat-showcase-info p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

.scene-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.scene-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--color-text);
  transition: all var(--transition);
}

.scene-tag:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.scene-tag img {
  width: 16px;
  height: 16px;
}

.scene-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.scene-card {
  background: var(--color-white);
  border-radius: var(--radius-sm);
  padding: 20px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

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

.scene-card-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.scene-card-icon.pink { background: #FFF0F3; }
.scene-card-icon.purple { background: #F5F0FF; }
.scene-card-icon.orange { background: #FFF8F0; }
.scene-card-icon.blue { background: #F0F8FF; }

.scene-card-icon img {
  width: 24px;
  height: 24px;
}

.scene-card h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-dark);
  margin-bottom: 4px;
}

.scene-card p {
  font-size: 12px;
  color: var(--color-text-light);
  margin: 0;
}

@media (max-width: 992px) {
  .chat-showcase-grid {
    flex-direction: column;
  }
  .chat-showcase-info {
    max-width: 100%;
    text-align: center;
  }
  .scene-tags {
    justify-content: center;
  }
  .scene-cards {
    max-width: 480px;
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .scene-cards {
    grid-template-columns: 1fr;
  }
}

.testimonials {
  padding: 100px 0;
  background: var(--color-white);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  position: relative;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.testimonial-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.testimonial-card::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 28px;
  width: 36px;
  height: 36px;
  background: url('../icons/quote.svg') no-repeat center / contain;
  opacity: 0.15;
}

.testimonial-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.testimonial-stars img {
  width: 18px;
  height: 18px;
}

.testimonial-text {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-white);
  flex-shrink: 0;
}

.testimonial-avatar.av1 { background: linear-gradient(135deg, #FF7E8B, #FFB6C1); }
.testimonial-avatar.av2 { background: linear-gradient(135deg, #C9A7FF, #A78BFA); }
.testimonial-avatar.av3 { background: linear-gradient(135deg, #FFB347, #FFD700); }
.testimonial-avatar.av4 { background: linear-gradient(135deg, #4FC3F7, #29B6F6); }
.testimonial-avatar.av5 { background: linear-gradient(135deg, #81C784, #66BB6A); }
.testimonial-avatar.av6 { background: linear-gradient(135deg, #FF8A65, #FF7043); }

.testimonial-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-dark);
}

.testimonial-role {
  font-size: 12px;
  color: var(--color-text-light);
}

@media (max-width: 992px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

.advantages {
  padding: 100px 0;
  background: linear-gradient(180deg, #F8F0FF 0%, #FFF5F5 100%);
  position: relative;
  overflow: hidden;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
}

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

.advantage-number {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  line-height: 1;
}

.advantage-number small {
  font-size: 20px;
}

.advantage-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-dark);
  margin-bottom: 6px;
}

.advantage-desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

@media (max-width: 992px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .advantages-grid {
    grid-template-columns: 1fr;
  }
}

.download {
  padding: 100px 0;
  background: linear-gradient(180deg, #FFF5F5 0%, #FFFFFF 100%);
  text-align: center;
}

.download-cards {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  max-width: 760px;
  margin: 0 auto;
}

.download-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 28px 30px;
  border-radius: var(--radius-md);
  text-decoration: none;
  text-align: left;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  flex: 1;
  min-width: 320px;
  max-width: 380px;
  position: relative;
  overflow: hidden;
}

.download-card::before {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.35s;
  pointer-events: none;
}

.download-card:hover::before {
  opacity: 1;
}

.card-ios {
  background: linear-gradient(135deg, #2D2D35 0%, #3A3A48 100%);
  box-shadow: 0 8px 28px rgba(45, 45, 53, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.card-ios::before {
  background: radial-gradient(circle, rgba(255, 126, 139, 0.15), transparent 70%);
  top: -40px;
  right: -40px;
}

.card-ios:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 44px rgba(45, 45, 53, 0.35);
}

.card-ios .dc-icon { background: rgba(255, 255, 255, 0.1); }
.card-ios .dc-badge { background: rgba(255, 126, 139, 0.2); color: #FFB6C1; }
.card-ios .dc-title { color: #FFFFFF; }
.card-ios .dc-hint { color: rgba(255, 255, 255, 0.5); }
.card-ios .dc-arrow { color: rgba(255, 255, 255, 0.3); }
.card-ios:hover .dc-arrow { color: #FFB6C1; }

.card-android {
  background: linear-gradient(135deg, #FDF8F0 0%, #FFFFFF 100%);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.06);
  border: 2px solid #E8ECD6;
}

.card-android::before {
  background: radial-gradient(circle, rgba(164, 198, 57, 0.12), transparent 70%);
  top: -40px;
  left: -40px;
}

.card-android:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 44px rgba(164, 198, 57, 0.15);
  border-color: #A4C639;
}

.card-android .dc-icon { background: #F2F7E0; }
.card-android .dc-badge { background: #F2F7E0; color: #7B9B36; }
.card-android .dc-title { color: #2D2D2D; }
.card-android .dc-hint { color: #999; }
.card-android .dc-arrow { color: #CCC; }
.card-android:hover .dc-arrow { color: #A4C639; }

.dc-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.download-card:hover .dc-icon {
  transform: scale(1.08);
}

.dc-icon img {
  width: 30px;
  height: 30px;
}

.dc-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.dc-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 10px;
  width: fit-content;
  letter-spacing: 0.5px;
}

.dc-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.dc-hint {
  font-size: 12px;
  line-height: 1.5;
}

.dc-arrow {
  font-size: 22px;
  font-weight: 300;
  flex-shrink: 0;
  transition: all var(--transition);
}

.download-card:hover .dc-arrow {
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .download-cards {
    flex-direction: column;
    align-items: center;
  }
  .download-card {
    min-width: auto;
    max-width: 100%;
    width: 100%;
  }
}

.faq {
  padding: 100px 0;
  background: var(--color-bg);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-white);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.active {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-dark);
  text-align: left;
  -webkit-tap-highlight-color: transparent;
  gap: 16px;
}

.faq-question img {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item.active .faq-question img {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer-content {
  padding: 0 28px 24px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.footer {
  background: #2D2D2D;
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  margin-bottom: 40px;
  align-items: start;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 14px;
}

.footer-logo img {
  width: 32px;
  height: 32px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.5);
}

.footer-cols-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 10px;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-brand {
    grid-column: 1;
    max-width: 100%;
  }
  .footer-cols-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .footer-cols-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }
  .footer-col h4 {
    font-size: 13px;
  }
  .footer-col a {
    font-size: 11px;
    margin-bottom: 6px;
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }

@media (max-width: 768px) {
  .section-header {
    margin-bottom: 40px;
  }
  .features,
  .chat-showcase,
  .testimonials,
  .advantages,
  .download,
  .faq {
    padding: 60px 0;
  }
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(255, 126, 139, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
  border: none;
  cursor: pointer;
  color: white;
  font-size: 20px;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: #FF6B7A;
  transform: translateY(-4px);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}