@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --zoom-blue: #0b5cff;
  --zoom-blue-dark: #0050e6;
  --zoom-blue-light: #e8f0fe;
  --zoom-dark: #232333;
  --zoom-gray-900: #232333;
  --zoom-gray-700: #4a4a5b;
  --zoom-gray-500: #747485;
  --zoom-gray-300: #c4c4cc;
  --zoom-gray-100: #f2f2f5;
  --zoom-white: #ffffff;
  --zoom-black: #0f0f1a;
  --zoom-purple: #7c4dff;
  --zoom-green: #00c853;
  --zoom-orange: #ff6d00;
  --zoom-yellow: #ffd740;
  --zoom-red: #ff5252;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: all 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--zoom-gray-900);
  line-height: 1.6;
  background: var(--zoom-white);
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: 0.5rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  border-radius: 0.625rem;
}

.btn-primary {
  background: var(--zoom-blue);
  color: var(--zoom-white);
  border-color: var(--zoom-blue);
}

.btn-primary:hover {
  background: var(--zoom-blue-dark);
  border-color: var(--zoom-blue-dark);
}

.btn-outline {
  background: transparent;
  color: var(--zoom-gray-900);
  border-color: var(--zoom-gray-300);
}

.btn-outline:hover {
  border-color: var(--zoom-gray-900);
}

/* 通知栏 */
.announcement-bar {
  background: var(--zoom-dark);
  color: var(--zoom-white);
  padding: 0.75rem 0;
}

.announcement-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  position: relative;
}

.announcement-icon {
  font-size: 1.125rem;
}

.announcement-bar p {
  font-size: 0.875rem;
  font-weight: 500;
}

.announcement-link {
  color: var(--zoom-white);
  text-decoration: underline;
  font-size: 0.875rem;
  font-weight: 600;
}

.announcement-link i {
  font-size: 0.75rem;
}

.announcement-close {
  position: absolute;
  right: 2rem;
  background: none;
  border: none;
  color: var(--zoom-white);
  cursor: pointer;
  padding: 0.25rem;
  opacity: 0.7;
}

.announcement-close:hover {
  opacity: 1;
}

/* 顶部导航 */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--zoom-white);
  border-bottom: 1px solid var(--zoom-gray-100);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.logo-zoom {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--zoom-blue);
  letter-spacing: -0.03em;
}

.logo-divider {
  width: 1px;
  height: 24px;
  background: var(--zoom-gray-300);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--zoom-gray-700);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
}

.nav-button {
  background: none;
  border: none;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--zoom-gray-700);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: var(--transition);
}

.nav-button:hover {
  color: var(--zoom-gray-900);
}

.nav-button i {
  font-size: 0.625rem;
  transition: var(--transition);
}

.nav-button[aria-expanded="true"] i {
  transform: rotate(180deg);
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--zoom-gray-700);
  padding: 0.5rem 0.75rem;
}

.nav-link:hover {
  color: var(--zoom-gray-900);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.header-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--zoom-gray-700);
}

.header-link:hover {
  color: var(--zoom-gray-900);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--zoom-gray-900);
  cursor: pointer;
}

/* Hero 区域 */
.hero {
  background: linear-gradient(135deg, var(--zoom-gray-100) 0%, var(--zoom-white) 100%);
  padding: 4rem 0;
}

.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--zoom-gray-900);
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: 1.125rem;
  color: var(--zoom-gray-700);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image {
  position: relative;
}

.hero-logo-text {
  font-size: 6rem;
  font-weight: 900;
  color: var(--zoom-blue);
  letter-spacing: -0.05em;
  text-shadow: 0 20px 60px rgba(45, 140, 255, 0.25);
}

.hero-badge {
  position: absolute;
  top: -1rem;
  right: -1rem;
  background: var(--zoom-white);
  padding: 0.75rem 1.25rem;
  border-radius: 1rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.hero-badge span {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--zoom-blue);
}

.hero-badge strong {
  font-size: 1rem;
  font-weight: 800;
  color: var(--zoom-gray-900);
}

/* 产品网格 */
.products-section {
  padding: 5rem 0;
  background: var(--zoom-white);
}

.products-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.products-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--zoom-gray-900);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--zoom-gray-500);
  margin-bottom: 3rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}

.product-card {
  background: var(--zoom-white);
  border: 1px solid var(--zoom-gray-100);
  border-radius: 1rem;
  padding: 2rem 1.5rem;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.product-card:hover {
  border-color: var(--zoom-blue);
  box-shadow: 0 8px 30px rgba(11, 92, 255, 0.1);
  transform: translateY(-4px);
}

.product-icon {
  width: 64px;
  height: 64px;
  background: var(--zoom-gray-100);
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.product-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--zoom-gray-900);
}

.product-card p {
  font-size: 0.875rem;
  color: var(--zoom-gray-500);
  line-height: 1.5;
}

/* AI Companion 专区 */
.ai-section {
  padding: 5rem 0;
  background: var(--zoom-gray-100);
}

.ai-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.ai-content h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--zoom-gray-900);
  margin-bottom: 1rem;
}

.ai-content > p {
  font-size: 1.125rem;
  color: var(--zoom-gray-700);
  margin-bottom: 1.5rem;
}

.ai-features {
  list-style: none;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ai-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1rem;
  color: var(--zoom-gray-700);
}

.ai-features li i {
  color: var(--zoom-blue);
  font-size: 0.875rem;
}

.ai-quote {
  border-left: 3px solid var(--zoom-blue);
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

.ai-quote p {
  font-size: 1rem;
  font-style: italic;
  color: var(--zoom-gray-700);
  margin-bottom: 0.5rem;
}

.ai-quote cite {
  font-size: 0.875rem;
  color: var(--zoom-gray-500);
}

.ai-buttons {
  display: flex;
  gap: 1rem;
}

.ai-image {
  display: flex;
  justify-content: center;
}

.ai-placeholder {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--zoom-blue) 0%, var(--zoom-purple) 100%);
  border-radius: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--zoom-white);
}

.ai-placeholder i {
  font-size: 4rem;
}

.ai-placeholder span {
  font-size: 1.25rem;
  font-weight: 700;
}

/* 解决方案场景 */
.solutions-section {
  padding: 5rem 0;
  background: var(--zoom-white);
}

.solutions-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.solutions-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--zoom-gray-900);
  margin-bottom: 3rem;
}

.solution-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--zoom-gray-100);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--zoom-gray-700);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover {
  background: var(--zoom-gray-300);
}

.tab-btn.active {
  background: var(--zoom-blue);
  color: var(--zoom-white);
}

.solution-content {
  text-align: left;
  max-width: 800px;
  margin: 0 auto;
}

.solution-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--zoom-gray-900);
  margin-bottom: 0.75rem;
}

.solution-content > p {
  font-size: 1.0625rem;
  color: var(--zoom-gray-700);
  margin-bottom: 2rem;
}

.solution-list {
  list-style: none;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.solution-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 1rem;
  color: var(--zoom-gray-700);
}

.solution-list li i {
  color: var(--zoom-blue);
  margin-top: 0.25rem;
}

/* 用户评价 */
.testimonials-section {
  padding: 5rem 0;
  background: var(--zoom-gray-100);
}

.testimonials-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.testimonials-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--zoom-gray-900);
  margin-bottom: 3rem;
}

.ratings {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-bottom: 3rem;
}

.rating-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.stars {
  color: var(--zoom-yellow);
  font-size: 1.25rem;
  letter-spacing: 0.125rem;
}

.rating-score {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--zoom-gray-900);
}

.rating-source {
  font-size: 0.875rem;
  color: var(--zoom-gray-500);
}

.testimonial-carousel {
  display: flex;
  gap: 2rem;
  justify-content: center;
}

.testimonial-slide {
  background: var(--zoom-white);
  padding: 2rem;
  border-radius: 1rem;
  max-width: 500px;
  text-align: left;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.testimonial-slide p {
  font-size: 1rem;
  color: var(--zoom-gray-700);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.testimonial-author img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.testimonial-author strong {
  display: block;
  font-size: 0.9375rem;
  color: var(--zoom-gray-900);
}

.testimonial-author span {
  display: block;
  font-size: 0.8125rem;
  color: var(--zoom-gray-500);
}

/* 客户案例 */
.stories-section {
  padding: 5rem 0;
  background: var(--zoom-white);
}

.stories-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.stories-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--zoom-gray-900);
  margin-bottom: 3rem;
}

.stories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.story-card {
  background: var(--zoom-white);
  border: 1px solid var(--zoom-gray-100);
  border-radius: 1rem;
  padding: 2rem;
  text-align: left;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.story-card:hover {
  border-color: var(--zoom-blue);
  box-shadow: 0 8px 30px rgba(11, 92, 255, 0.1);
}

.story-card > p {
  font-size: 1rem;
  color: var(--zoom-gray-700);
  line-height: 1.6;
  font-style: italic;
}

.story-author strong {
  display: block;
  font-size: 1.125rem;
  color: var(--zoom-gray-900);
  margin-bottom: 0.25rem;
}

.story-author span {
  display: block;
  font-size: 0.875rem;
  color: var(--zoom-gray-500);
  margin-bottom: 1rem;
}

.story-link {
  color: var(--zoom-blue);
  font-weight: 600;
  font-size: 0.9375rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.story-link:hover {
  gap: 0.75rem;
}

/* 最新动态 */
.news-section {
  padding: 5rem 0;
  background: var(--zoom-gray-100);
}

.news-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.news-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--zoom-gray-900);
  margin-bottom: 3rem;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.news-card {
  background: var(--zoom-white);
  border-radius: 1rem;
  padding: 2rem;
  text-align: left;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.news-card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.news-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--zoom-blue);
  color: var(--zoom-white);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
}

.news-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--zoom-gray-900);
}

.news-card p {
  font-size: 0.9375rem;
  color: var(--zoom-gray-700);
  line-height: 1.6;
}

.news-link {
  color: var(--zoom-blue);
  font-weight: 600;
  font-size: 0.9375rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.news-link:hover {
  gap: 0.75rem;
}

/* 页脚 */
.footer {
  background: var(--zoom-dark);
  color: var(--zoom-white);
}

.footer-top {
  padding: 4rem 0 2rem;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--zoom-white);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--zoom-gray-300);
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 2rem 0;
}

.footer-bottom-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-controls {
  display: flex;
  gap: 1rem;
}

.footer-select {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--zoom-white);
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  cursor: pointer;
}

.footer-select option {
  background: var(--zoom-dark);
  color: var(--zoom-white);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--zoom-white);
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--zoom-blue);
}

.footer-legal {
  display: flex;
  gap: 1.5rem;
}

.footer-legal a {
  font-size: 0.8125rem;
  color: var(--zoom-gray-300);
}

.footer-legal a:hover {
  color: var(--zoom-white);
}

.copyright {
  font-size: 0.8125rem;
  color: var(--zoom-gray-500);
  margin-top: 1rem;
  width: 100%;
  text-align: center;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-image {
    order: -1;
  }
  
  .ai-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .ai-image {
    order: -1;
  }
  
  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  
  .main-nav.mobile-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--zoom-white);
    padding: 1rem;
    border-top: 1px solid var(--zoom-gray-100);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .header-actions {
    display: none;
  }
  
  .hero {
    padding: 3rem 0;
  }
  
  .hero-content h1 {
    font-size: 2.25rem;
  }
  
  .hero-image img {
    width: 200px;
    height: 200px;
  }
  
  .products-section h2,
  .solutions-section h2,
  .testimonials-section h2,
  .stories-section h2,
  .news-section h2 {
    font-size: 1.75rem;
  }
  
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .ratings {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .testimonial-carousel {
    flex-direction: column;
  }
  
  .stories-grid {
    grid-template-columns: 1fr;
  }
  
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-inner {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom-inner {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.875rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .product-grid {
    grid-template-columns: 1fr;
  }
  
  .solution-tabs {
    flex-direction: column;
  }
  
  .tab-btn {
    width: 100%;
  }
}