:root {
  --primary: #e6005c;
  --primary-light: #fff0f5;
  --primary-hover: #cc0052;
  --secondary: #ff3377;
  --accent: #ff6699;
  --dark-text: #2c2125;
  --body-text: #594a50;
  --light-bg: #fffbfd;
  --card-bg: #ffffff;
  --border-color: #fce1eb;
  --shadow-sm: 0 4px 12px rgba(230, 0, 92, 0.05);
  --shadow-md: 0 8px 24px rgba(230, 0, 92, 0.08);
  --shadow-lg: 0 12px 36px rgba(230, 0, 92, 0.12);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--light-bg);
  color: var(--body-text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(230, 0, 92, 0.03);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-box {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-box .ai-page-logo {
  height: 38px;
  width: auto;
  display: block;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  color: var(--dark-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  border-radius: var(--radius-sm);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 30px;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(230, 0, 92, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
  box-shadow: 0 6px 18px rgba(230, 0, 92, 0.4);
  transform: translateY(-2px);
}

.btn-outline {
  border-color: var(--primary);
  color: var(--primary);
  background: #ffffff;
}

.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--dark-text);
  cursor: pointer;
}

/* 视觉首屏 (无图片) */
.hero-section {
  padding: 80px 0 60px;
  background: radial-gradient(circle at 50% 10%, #ffeaf1 0%, #fffbfd 70%);
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--primary-light);
  border: 1px solid var(--border-color);
  color: var(--primary);
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--dark-text);
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title span {
  color: var(--primary);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--body-text);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

.hero-cta .btn {
  padding: 14px 32px;
  font-size: 1.05rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-tag-item {
  padding: 6px 14px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--body-text);
  box-shadow: var(--shadow-sm);
}

/* 通用Section */
.section {
  padding: 70px 0;
}

.section-alt {
  background-color: #fff7fa;
}

.section-head {
  text-align: center;
  margin-bottom: 45px;
}

.section-tag {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1rem;
  color: var(--body-text);
  max-width: 680px;
  margin: 0 auto;
}

/* 数据看板 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: -30px;
  margin-bottom: 40px;
  position: relative;
  z-index: 10;
}

.stat-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--secondary);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--body-text);
}

/* 卡片网格 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.feature-card h3 {
  font-size: 1.25rem;
  color: var(--dark-text);
  margin-bottom: 12px;
  font-weight: 600;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--body-text);
  line-height: 1.6;
}

.feature-tag-mini {
  align-self: flex-start;
  font-size: 0.75rem;
  padding: 3px 8px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  margin-bottom: 14px;
  font-weight: 600;
}

/* 平台聚合大厅 */
.platform-pill-container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 30px;
}

.model-pill {
  padding: 10px 18px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 30px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--dark-text);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.model-pill:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  transform: scale(1.05);
}

/* 图文与素材展示 */
.media-container {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.media-container img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.banner-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 30px;
}

/* 步骤流程 */
.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.step-index {
  display: inline-flex;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.step-card h4 {
  font-size: 1.1rem;
  color: var(--dark-text);
  margin-bottom: 8px;
}

/* 对比评测表格 */
.table-wrapper {
  overflow-x: auto;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.eval-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.eval-table th,
.eval-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #f9e2ec;
  font-size: 0.95rem;
}

.eval-table th {
  background: var(--primary-light);
  color: var(--dark-text);
  font-weight: 700;
}

.eval-table tr:hover {
  background-color: #fff9fb;
}

.highlight-cell {
  color: var(--primary);
  font-weight: 700;
}

.score-badge-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, #fff0f5 0%, #ffe3ed 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px 32px;
  margin-bottom: 30px;
}

.score-stars {
  color: #ff9900;
  font-size: 1.4rem;
  letter-spacing: 2px;
}

.score-text-big {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
}

/* FAQ 折叠面板 */
.faq-accordion {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-header {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--dark-text);
  user-select: none;
  transition: var(--transition);
}

.faq-header:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.faq-icon {
  font-size: 1.2rem;
  color: var(--primary);
  transition: transform 0.3s ease;
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 24px;
  background-color: #ffffff;
  color: var(--body-text);
  font-size: 0.92rem;
}

.faq-item.active .faq-body {
  padding: 0 24px 18px 24px;
  max-height: 200px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

/* 用户评论 */
.comment-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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

.comment-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

/* 需求匹配与表单 */
.form-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--dark-text);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--dark-text);
  background: #fffbfd;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(230, 0, 92, 0.1);
}

/* 文章列表 */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.article-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.article-item a {
  text-decoration: none;
  color: var(--dark-text);
  font-weight: 600;
  font-size: 1rem;
  display: block;
  margin-bottom: 8px;
  transition: var(--transition);
}

.article-item a:hover {
  color: var(--primary);
}

/* 页脚 */
.site-footer {
  background: #23181d;
  color: #d1c5ca;
  padding: 60px 0 30px;
  border-top: 4px solid var(--primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 18px;
}

.footer-col p,
.footer-col li {
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-links {
  list-style: none;
}

.footer-links li a {
  color: #d1c5ca;
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-qrcode {
  width: 110px;
  height: 110px;
  background: #ffffff;
  padding: 6px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.footer-qrcode img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid #3d2d34;
  font-size: 0.85rem;
  color: #9c8e94;
}

/* 友情链接 */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid #3d2d34;
  margin-bottom: 20px;
}

.friend-links a {
  color: #b0a1a8;
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}

.friend-links a:hover {
  color: var(--accent);
}

/* 浮动客服 */
.floating-contact {
  position: fixed;
  right: 20px;
  bottom: 40px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 999;
}

.float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 1.2rem;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.float-btn:hover {
  transform: scale(1.1);
  background: var(--primary-hover);
}

.back-to-top {
  display: none;
  background: #44323a;
}

/* 响应式断点 */
@media (max-width: 992px) {
  .grid-4, .step-grid, .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3, .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.1rem;
  }
  .menu-toggle {
    display: block;
  }
  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: none;
    box-shadow: var(--shadow-md);
  }
  .nav-links.active {
    display: flex;
  }
  .grid-4, .grid-3, .grid-2, .step-grid, .stats-grid, .article-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .banner-strip {
    grid-template-columns: 1fr;
  }
  .score-badge-card {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
}