/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #121212;
  color: white;
  overflow-x: hidden;
  line-height: 1.6;
}

::selection {
  background: white;
  color: black;
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #121212;
}

::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: #444;
}

/* 动画 */
@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(-12deg);
  }
  50% {
    transform: translateY(-20px) rotate(-15deg);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  transition: all 0.3s ease;
  padding: 8px 0;
}

.navbar.scrolled {
  background: rgba(18, 18, 18, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 0;
}

.navbar .container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.logo-image {
  height: 40px;
  width: auto;
  transition: transform 0.3s ease, filter 0.3s ease;
}

.logo:hover .logo-image {
  transform: scale(1.05);
  filter: brightness(1.1);
}

.nav-menu {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 50px;
  padding: 8px 32px;
  gap: 32px;
}

.nav-link {
  background: none;
  border: none;
  color: #9ca3af;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: white;
}

.btn-primary {
  background: white;
  color: black;
  padding: 10px 32px;
  border-radius: 50px;
  border: none;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.3s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
  transform: scale(1.05);
}

.btn-primary:active {
  transform: scale(0.95);
}

/* 页面切换 */
.page {
  display: none;
  animation: fadeIn 0.7s ease;
}

.page.active {
  display: block;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(59, 130, 246, 0.1), transparent);
  z-index: -1;
  pointer-events: none;
}

.hero-container {
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content {
  z-index: 10;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
  color: #9ca3af;
  margin-bottom: 32px;
  animation: bounce 2s ease-in-out infinite;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
}

.hero-title {
  color: white;
  font-size: 120px;
  font-weight: bold;
  font-style: italic;
  letter-spacing: -0.05em;
  margin-bottom: 24px;
  line-height: 1;
}

.hero-gradient {
  background: linear-gradient(to right, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 64px;
  font-weight: bold;
  line-height: 1.1;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.text-gray {
  color: #9ca3af;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.btn-white {
  padding: 20px 40px;
  background: white;
  color: black;
  border-radius: 50px;
  border: none;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-white:hover {
  transform: scale(1.05);
}

.btn-white:active {
  transform: scale(0.95);
}

.btn-outline {
  padding: 20px 40px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  background: transparent;
  color: white;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* 手机模型 */
.hero-phones {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 450px;
}

.phone-main {
  position: relative;
  z-index: 20;
  transform: translateX(-32px) translateY(24px);
}

.phone-secondary {
  position: absolute;
  z-index: 10;
  top: 0;
  right: 0;
  transform: translateX(24px) translateY(-32px) rotate(12deg);
  opacity: 0.4;
  filter: blur(2px);
}

.phone-mockup {
  position: relative;
  width: 200px;
  aspect-ratio: 9/19.5;
  background: #1a1a1a;
  border-radius: 36px;
  border: 6px solid #2a2a2a;
  padding: 6px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.phone-notch {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 70px;
  height: 18px;
  background: #2a2a2a;
  border-radius: 0 0 10px 10px;
  z-index: 10;
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 26px;
  overflow: hidden;
  background: black;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Categories Section */
.categories-section {
  padding: 96px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
  overflow: hidden;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-size: 14px;
  font-weight: bold;
  color: #60a5fa;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 40px;
}

.categories-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.category-item:hover {
  background: white;
  color: black;
  transform: translateY(-2px);
}

/* Value Props Section */
.value-section {
  padding: 128px 0;
  background: #0a0a0a;
}

.section-header {
  text-align: center;
  margin-bottom: 96px;
}

.section-title {
  font-size: 64px;
  font-weight: bold;
  margin-bottom: 24px;
}

.section-desc {
  font-size: 20px;
  color: #6b7280;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.value-card {
  padding: 40px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 40px;
  transition: all 0.3s ease;
}

.value-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.value-icon {
  width: 64px;
  height: 64px;
  background: rgba(59, 130, 246, 0.1);
  color: #60a5fa;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
  transition: transform 0.3s ease;
}

.value-card:hover .value-icon {
  transform: scale(1.1);
}

.value-icon svg {
  width: 32px;
  height: 32px;
}

.value-title {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 16px;
}

.value-desc {
  color: #6b7280;
  line-height: 1.8;
  font-weight: 300;
}

/* Pricing Section */
.pricing-section {
  padding: 128px 0;
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 64px;
  align-items: center;
}

.pricing-info {
  flex: 1;
}

.pricing-title {
  font-size: 80px;
  font-weight: bold;
  font-style: italic;
  margin-bottom: 32px;
}

.pricing-subtitle {
  font-size: 20px;
  color: #9ca3af;
  margin-bottom: 48px;
  max-width: 448px;
  line-height: 1.8;
}

.pricing-items {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.pricing-item {
  display: flex;
  align-items: center;
  gap: 24px;
}

.pricing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.pricing-dot.blue {
  background: #3b82f6;
}

.pricing-dot.orange {
  background: #f97316;
}

.pricing-price {
  font-size: 48px;
  font-weight: bold;
}

.pricing-price.orange {
  color: #f97316;
}

.pricing-unit {
  font-size: 14px;
  font-weight: normal;
  color: #6b7280;
}

.pricing-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-top: 4px;
  color: #6b7280;
}

.pricing-label.orange {
  color: #f97316;
}

.pricing-card {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 48px;
  padding: 48px;
  position: relative;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.pricing-badge {
  position: absolute;
  top: -24px;
  right: -24px;
  background: white;
  color: black;
  padding: 8px 24px;
  border-radius: 50px;
  font-weight: bold;
  font-size: 14px;
  transform: rotate(6deg);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.pricing-card-title {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 32px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 40px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 16px;
  color: #d1d5db;
  margin-bottom: 16px;
}

.check-icon {
  width: 20px;
  height: 20px;
  color: #10b981;
  flex-shrink: 0;
}

.btn-white-full {
  width: 100%;
  padding: 20px;
  background: white;
  color: black;
  border-radius: 50px;
  border: none;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-white-full:hover {
  transform: scale(1.02);
}

/* Community Section */
.community-section {
  background: white;
  padding: 128px 0;
  overflow: hidden;
  position: relative;
}

.container-grid {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.community-content {
  color: black;
}

.ecosystem-badge {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 50px;
  font-size: 12px;
  font-weight: bold;
  margin-bottom: 24px;
  letter-spacing: 0.15em;
}

.community-title {
  font-size: 96px;
  font-weight: 900;
  margin-bottom: 32px;
  letter-spacing: -0.05em;
  font-style: italic;
  line-height: 1;
}

.community-subtitle {
  font-size: 32px;
  color: #4b5563;
  margin-bottom: 40px;
  line-height: 1.4;
  font-weight: 500;
}

.community-highlight {
  color: black;
  font-weight: 900;
  border-bottom: 4px solid #3b82f6;
}

.community-desc {
  color: #6b7280;
  font-size: 18px;
  margin-bottom: 48px;
  max-width: 448px;
  line-height: 1.8;
}

.community-buttons {
  display: flex;
  gap: 24px;
}

.btn-black {
  padding: 20px 48px;
  background: black;
  color: white;
  border-radius: 50px;
  border: none;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-black:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.btn-outline-black {
  padding: 20px 48px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 50px;
  background: transparent;
  color: black;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-outline-black:hover {
  background: rgba(0, 0, 0, 0.05);
}

.community-visual {
  position: relative;
}

.community-glow {
  position: absolute;
  inset: -80px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 50%;
  filter: blur(100px);
  z-index: -1;
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.4;
  }
  50% {
    opacity: 0.6;
  }
}

.community-phone {
  transform: rotate(2deg);
  transition: transform 0.7s ease;
  border-radius: 48px;
  overflow: hidden;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
}

.community-phone:hover {
  transform: rotate(0deg);
}

.community-phone .phone-mockup {
  border: none;
}

.community-float {
  position: absolute;
  bottom: -40px;
  left: -40px;
  width: 176px;
  height: 176px;
  background: white;
  border-radius: 32px;
  padding: 32px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: rotate(-12deg);
  border: 1px solid rgba(0, 0, 0, 0.05);
  animation: float 6s ease-in-out infinite;
}

.float-emoji {
  font-size: 64px;
  margin-bottom: 8px;
}

.float-text {
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #9ca3af;
}

/* Product Page */
.product-hero {
  padding: 128px 24px;
}

.features-title {
  font-size: 96px;
  font-weight: bold;
  margin-bottom: 96px;
  letter-spacing: -0.05em;
  font-style: italic;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 80px 48px;
}

.feature-item {
  cursor: pointer;
}

.feature-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 32px;
}

.feature-number {
  font-size: 14px;
  font-weight: bold;
  opacity: 0.3;
  letter-spacing: 0.15em;
}

.feature-title {
  font-size: 32px;
  font-weight: bold;
  transition: color 0.3s ease;
}

.feature-item:hover .feature-title {
  color: #60a5fa;
}

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

.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #6b7280;
  margin-bottom: 16px;
  transition: color 0.3s ease;
}

.feature-item:hover .feature-list li {
  color: white;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.5);
  flex-shrink: 0;
}

/* Detail Section */
.detail-section {
  padding: 160px 24px;
}

.detail-section.bg-light {
  background: rgba(255, 255, 255, 0.05);
}

.detail-section.reverse .detail-container {
  flex-direction: row-reverse;
}

.detail-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 128px;
}

.detail-content {
  flex: 1;
}

.detail-title {
  font-size: 96px;
  font-weight: bold;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  line-height: 1;
}

.detail-subtitle {
  font-size: 32px;
  font-weight: bold;
  margin-bottom: 40px;
  color: #9ca3af;
}

.detail-desc {
  font-size: 24px;
  color: #6b7280;
  line-height: 1.8;
  max-width: 512px;
}

.detail-visual {
  flex: 1;
  position: relative;
  display: flex;
  justify-content: center;
}

.detail-glow {
  position: absolute;
  inset: -80px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}

.detail-visual .phone-mockup {
  transition: transform 0.5s ease;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  border-color: #1a1a1a;
}

.detail-visual .phone-mockup:hover {
  transform: scale(1.05);
}

/* Product CTA */
.product-cta {
  padding: 160px 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.cta-content {
  max-width: 896px;
  margin: 0 auto;
  padding: 0 24px;
}

.cta-title {
  font-size: 112px;
  font-weight: 900;
  margin-bottom: 48px;
  font-style: italic;
  letter-spacing: -0.05em;
}

.cta-desc {
  font-size: 20px;
  color: #6b7280;
  margin-bottom: 64px;
  line-height: 1.8;
}

.btn-white-lg {
  padding: 24px 64px;
  background: white;
  color: black;
  border-radius: 50px;
  border: none;
  font-weight: bold;
  font-size: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.btn-white-lg:hover {
  transform: scale(1.1);
}

.btn-white-lg:active {
  transform: scale(0.95);
}

/* Simple Page (Case) */
.simple-page {
  animation: fadeIn 0.5s ease;
  padding: 128px 24px;
  text-align: center;
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.simple-title {
  font-size: 96px;
  font-weight: bold;
  margin-bottom: 32px;
  font-style: italic;
}

.simple-desc {
  font-size: 20px;
  color: #9ca3af;
  max-width: 672px;
}

.simple-divider {
  margin-top: 64px;
  width: 100%;
  max-width: 1280px;
  height: 1px;
  background: rgba(255, 255, 255, 0.05);
}

/* About Page */
.about-section {
  padding: 128px 24px;
}

.about-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 128px;
}

.about-title {
  font-size: 80px;
  font-weight: bold;
  margin-bottom: 64px;
  font-style: italic;
}

.about-company-card {
  background: white;
  padding: 48px;
  border-radius: 40px;
  margin-bottom: 48px;
  display: flex;
  align-items: center;
  gap: 24px;
  color: black;
  transition: transform 0.3s ease;
}

.about-company-card:hover {
  transform: scale(1.05);
}

.company-logo {
  width: 80px;
  height: 80px;
  background: black;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.company-logo span {
  color: white;
  font-size: 48px;
  font-weight: bold;
  font-style: italic;
}

.company-name {
  font-size: 32px;
  font-weight: bold;
}

.company-subtitle {
  font-size: 14px;
  letter-spacing: 0.2em;
  opacity: 0.4;
  text-transform: uppercase;
}

.about-text {
  color: #9ca3af;
  line-height: 1.8;
  font-size: 20px;
  font-weight: 300;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

.stat-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  position: relative;
}

.stat-box:hover .stat-number {
  transform: scale(1.1);
}

.stat-number {
  font-size: 80px;
  font-weight: bold;
  color: white;
  letter-spacing: -0.02em;
  transition: transform 0.5s ease;
}

.stat-label {
  color: #6b7280;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-weight: 600;
}

/* Cooperate Page */
.cooperate-hero {
  padding: 80px 24px 40px;
}

.cooperate-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 96px;
  padding: 80px 0 40px;
}

.cooperate-content {
  flex: 1;
}

.cooperate-badge {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50px;
  font-size: 12px;
  font-weight: bold;
  margin-bottom: 32px;
  color: #60a5fa;
}

.cooperate-title {
  font-size: 112px;
  font-weight: bold;
  margin-bottom: 40px;
  letter-spacing: -0.05em;
  line-height: 1.1;
}

.cooperate-desc {
  font-size: 24px;
  color: #9ca3af;
  line-height: 1.8;
  margin-bottom: 48px;
}

.cooperate-video {
  aspect-ratio: 16/9;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 48px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.cooperate-video img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
  transition: transform 1s ease;
}

.cooperate-video:hover img {
  transform: scale(1.1);
}

.play-button {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-button svg {
  width: 96px;
  height: 96px;
  background: white;
  color: black;
  border-radius: 50%;
  padding: 24px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  transition: transform 0.3s ease;
}

.play-button svg:hover {
  transform: scale(1.1);
}

.cooperate-benefits {
  flex: 1;
  width: 100%;
}

.benefits-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 48px;
  padding: 48px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.benefits-title {
  font-size: 32px;
  font-weight: bold;
  margin-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.title-bar {
  width: 8px;
  height: 32px;
  background: #3b82f6;
  border-radius: 50px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.benefit-item {
  cursor: pointer;
}

.benefit-title {
  font-size: 20px;
  font-weight: bold;
  color: #60a5fa;
  margin-bottom: 12px;
  transition: transform 0.3s ease;
}

.benefit-item:hover .benefit-title {
  transform: translateX(8px);
}

.benefit-desc {
  color: #6b7280;
  font-size: 14px;
  line-height: 1.8;
}

/* PDF Section */
.pdf-section {
  padding: 128px 24px;
  background: #0f0f0f;
}

.pdf-card {
  max-width: 1280px;
  margin: 0 auto;
  background: white;
  border-radius: 48px;
  padding: 80px;
  color: black;
  display: flex;
  align-items: center;
  gap: 64px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.pdf-content {
  flex: 1;
}

.pdf-badge {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 50px;
  font-size: 10px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 24px;
}

.pdf-title {
  font-size: 80px;
  font-weight: 900;
  margin-bottom: 32px;
  letter-spacing: -0.05em;
  line-height: 1;
  font-style: italic;
}

.pdf-desc {
  font-size: 20px;
  color: #4b5563;
  margin-bottom: 48px;
  font-weight: 500;
  line-height: 1.8;
}

.btn-download {
  position: relative;
  background: black;
  color: white;
  padding: 20px 40px;
  border-radius: 50px;
  border: none;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: padding-right 0.3s ease;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}

.btn-download:hover {
  padding-right: 56px;
}

.download-icon {
  width: 20px;
  height: 20px;
  position: absolute;
  right: 16px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.btn-download:hover .download-icon {
  opacity: 1;
}

.pdf-preview {
  flex: 1;
  width: 100%;
}

.pdf-mockup {
  aspect-ratio: 4/3;
  background: #f3f4f6;
  border-radius: 16px;
  padding: 32px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
}

.pdf-cover {
  flex: 1;
  background: #121212;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.pdf-mockup:hover .pdf-cover {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(168, 85, 247, 0.2)), #121212;
}

.pdf-logo {
  color: white;
  font-size: 80px;
  font-weight: 900;
  font-style: italic;
  letter-spacing: -0.05em;
  text-align: center;
  line-height: 1;
}

.pdf-info {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 8px;
}

.pdf-name {
  font-weight: bold;
  font-size: 14px;
}

.pdf-size {
  font-size: 12px;
  color: #9ca3af;
}

/* Footer */
.footer {
  background: #121212;
  padding: 80px 0 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-header {
  text-align: center;
  margin-bottom: 64px;
}

.footer-slogan {
  font-size: 48px;
  font-weight: bold;
  color: white;
  margin-bottom: 16px;
}

.footer-divider {
  height: 1px;
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  margin-top: 40px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 48px;
  margin-bottom: 80px;
}

.footer-social {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}

.social-label {
  color: #6b7280;
  font-size: 12px;
  margin-bottom: 8px;
}

.social-icons {
  display: flex;
  gap: 24px;
  align-items: center;
}

.social-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.social-item:hover .social-icon {
  transform: scale(1.1);
}

.social-name {
  color: #6b7280;
  font-size: 10px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.contact-label {
  color: #6b7280;
  font-size: 14px;
  font-weight: 600;
}

.contact-wrapper {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

.contact-wrapper:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.contact-qrcode {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.qrcode-image {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  object-fit: cover;
}

.qrcode-text {
  color: #9ca3af;
  font-size: 11px;
  text-align: center;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-icon-svg {
  width: 18px;
  height: 18px;
  color: #60a5fa;
  flex-shrink: 0;
}

.contact-info span {
  color: #d1d5db;
  font-size: 14px;
  white-space: nowrap;
}

.footer-copyright {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 48px;
  font-size: 12px;
  color: #6b7280;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 40px;
}

/* Floating Action Button */
.fab {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 50;
  width: 56px;
  height: 56px;
  background: white;
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  transition: transform 0.3s ease;
}

.fab:hover {
  transform: scale(1.1);
}

.fab-content {
  position: relative;
}

.fab-icon {
  width: 32px;
  height: 32px;
  color: black;
}

.fab-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 12px;
  height: 12px;
  background: #ef4444;
  border-radius: 50%;
  border: 2px solid white;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-title {
    font-size: 80px;
  }

  .hero-subtitle {
    font-size: 48px;
  }

  .hero-phones {
    height: 400px;
  }

  .phone-mockup {
    width: 180px;
  }

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

  .pricing-layout {
    flex-direction: column;
  }

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

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

  .detail-container {
    flex-direction: column;
    gap: 64px;
  }

  .detail-section.reverse .detail-container {
    flex-direction: column;
  }

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

  .cooperate-grid {
    flex-direction: column;
  }

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

  .pdf-card {
    flex-direction: column;
  }

  .nav-menu {
    display: none;
  }
}

@media (max-width: 768px) {
  .logo-image {
    height: 30px;
  }

  .hero-title {
    font-size: 56px;
  }

  .hero-subtitle {
    font-size: 32px;
  }

  .section-title {
    font-size: 40px;
  }

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

  .detail-title {
    font-size: 56px;
  }

  .cta-title {
    font-size: 56px;
  }

  .community-title {
    font-size: 56px;
  }

  .cooperate-title {
    font-size: 56px;
  }

  .hero-phones {
    height: 350px;
  }

  .phone-mockup {
    width: 160px;
  }

  .phone-secondary {
    display: none;
  }

  .footer-content {
    flex-direction: column;
    align-items: center;
    gap: 32px;
  }

  .footer-contact {
    align-items: center;
    width: 100%;
  }

  .contact-wrapper {
    flex-direction: column;
    width: 100%;
    max-width: 320px;
    padding: 20px;
  }

  .contact-qrcode {
    margin-bottom: 8px;
  }

  .qrcode-image {
    width: 100px;
    height: 100px;
  }

  .contact-details {
    width: 100%;
    gap: 10px;
  }

  .contact-info {
    justify-content: center;
  }
}