:root {
  --primary-pink: #e6005c;
  --primary-rose: #ff2a85;
  --primary-deep: #b80046;
  --accent-light: #fff0f5;
  --accent-soft: #ffe4ee;
  --text-main: #1f2329;
  --text-muted: #5c6370;
  --text-light: #8f95a3;
  --border-color: #ffd1e1;
  --bg-page: #fdfafb;
  --bg-card: #ffffff;
  --shadow-sm: 0 4px 12px rgba(230, 0, 92, 0.05);
  --shadow-md: 0 8px 24px rgba(230, 0, 92, 0.08);
  --shadow-hover: 0 12px 32px rgba(230, 0, 92, 0.16);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.28s ease;
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.6;
}

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

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

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

.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background-color: #fff7fa;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px auto;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--accent-soft);
  color: var(--primary-pink);
  font-size: 13px;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  color: #11141a;
  margin-bottom: 14px;
}

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

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

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

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-wrapper .ai-page-logo {
  height: 38px;
  width: auto;
}

.brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary-pink);
  letter-spacing: -0.5px;
}

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

.nav-links li a {
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  transition: var(--transition);
  border-radius: var(--radius-sm);
}

.nav-links li a:hover {
  color: var(--primary-pink);
  background: var(--accent-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: 14px;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: linear-gradient(135deg, #ff4093 0%, var(--primary-deep) 100%);
  box-shadow: 0 6px 18px rgba(230, 0, 92, 0.4);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background: var(--accent-soft);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-main);
  cursor: pointer;
}

/* 首屏 HERO */
.hero-section {
  padding: 90px 0 70px 0;
  background: radial-gradient(circle at 80% 20%, #ffe3ed 0%, #fff7fa 40%, #ffffff 80%);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--accent-soft);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  color: var(--primary-deep);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 42px;
  font-weight: 900;
  line-height: 1.25;
  color: #121417;
  max-width: 960px;
  margin: 0 auto 20px auto;
  letter-spacing: -0.5px;
}

.hero-title span {
  color: var(--primary-pink);
  background: linear-gradient(135deg, #e6005c, #ff4d94);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 36px auto;
  line-height: 1.8;
}

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

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

.stat-item-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.stat-item-box:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-rose);
}

.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-pink);
  margin-bottom: 4px;
}

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

/* 标签云与模型聚合 */
.models-strip {
  margin-top: 40px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
}

.models-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.model-tag {
  font-size: 12px;
  padding: 4px 12px;
  background: #ffffff;
  border: 1px solid #ffd6e4;
  border-radius: 4px;
  color: var(--text-muted);
  font-weight: 500;
  transition: var(--transition);
}

.model-tag:hover {
  border-color: var(--primary-pink);
  color: var(--primary-pink);
  background: var(--accent-light);
}

/* 通用网格 */
.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: 32px;
}

/* 卡片基础 */
.service-card {
  background: var(--bg-card);
  border: 1px solid #ffe1ec;
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-rose);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--primary-pink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 18px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: #1a1e24;
  margin-bottom: 10px;
}

.card-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  flex-grow: 1;
}

.card-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--primary-deep);
  background: var(--accent-light);
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: 14px;
  align-self: flex-start;
}

/* 图片展示区 */
.media-showcase-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-top: 30px;
}

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

.media-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.media-item:hover img {
  transform: scale(1.02);
}

.media-meta {
  padding: 16px;
  background: #ffffff;
}

.media-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
}

.media-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* 流程步骤 */
.steps-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.step-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.step-num {
  font-size: 28px;
  font-weight: 900;
  color: var(--primary-pink);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 12px;
}

.step-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* 对比评测卡片与表格 */
.eval-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
  margin-bottom: 30px;
}

.eval-header-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.score-badge {
  display: flex;
  align-items: baseline;
  gap: 8px;
  background: var(--accent-light);
  padding: 8px 20px;
  border-radius: 50px;
  border: 1px solid var(--border-color);
}

.score-num {
  font-size: 32px;
  font-weight: 900;
  color: var(--primary-pink);
}

.score-max {
  font-size: 14px;
  color: var(--text-muted);
}

.stars-view {
  color: #ff9900;
  font-size: 18px;
  font-weight: 700;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

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

.eval-table th, .eval-table td {
  padding: 14px 18px;
  border-bottom: 1px solid #f2e1e8;
  font-size: 14px;
}

.eval-table th {
  background: #fff0f5;
  color: var(--text-main);
  font-weight: 700;
}

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

.highlight-col {
  font-weight: 600;
  color: var(--primary-pink);
  background-color: #fff7fa;
}

/* 用户评论 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.review-body {
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.7;
  margin-bottom: 20px;
  position: relative;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid #fcedf2;
  padding-top: 14px;
}

.avatar-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--primary-pink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.author-meta h4 {
  font-size: 14px;
  font-weight: 700;
}

.author-meta p {
  font-size: 12px;
  color: var(--text-light);
}

/* FAQ 折叠面板 */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary-pink);
}

.faq-toggle-icon {
  font-size: 18px;
  font-weight: 400;
  color: var(--primary-pink);
  transition: transform 0.2s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  background: #fffcfd;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px 24px;
  border-top: 1px dashed var(--border-color);
}

/* 表单与联系 */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.form-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #ffd1e1;
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: #ffffff;
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary-pink);
  box-shadow: 0 0 0 3px rgba(230, 0, 92, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

.contact-info-panel {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.info-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-soft);
  color: var(--primary-pink);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.info-text strong {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
}

.info-text p, .info-text a {
  font-size: 14px;
  color: var(--text-muted);
}

.qrcode-box {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--accent-light);
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-color);
  margin-top: 10px;
}

.qrcode-box img {
  width: 90px;
  height: 90px;
  border-radius: 6px;
  background: #fff;
  padding: 4px;
  border: 1px solid var(--border-color);
}

.qrcode-desc h5 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}

.qrcode-desc p {
  font-size: 12px;
  color: var(--text-muted);
}

/* 文章列表与友情链接 */
.articles-wrapper {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 30px;
}

.article-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
  margin-top: 14px;
}

.article-links-list a {
  font-size: 13px;
  padding: 6px 14px;
  background: #fff7fa;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-main);
  transition: var(--transition);
}

.article-links-list a:hover {
  background: var(--primary-pink);
  color: #ffffff;
  border-color: var(--primary-pink);
}

.friend-links-box {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px dashed var(--border-color);
}

.friend-links-box span {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
}

.friend-links-box a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
}

.friend-links-box a:hover {
  color: var(--primary-pink);
}

/* 页脚 */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px 0;
  color: var(--text-main);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid #f5e4ec;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #11141a;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.footer-bottom {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-light);
}

/* 浮动工具栏 */
.floating-actions {
  position: fixed;
  right: 20px;
  bottom: 30px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--primary-pink);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
  font-weight: 700;
}

.float-btn:hover {
  background: var(--primary-pink);
  color: #ffffff;
  transform: translateY(-2px);
}

/* 响应式媒体查询 */
@media (max-width: 992px) {
  .hero-title {
    font-size: 32px;
  }
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3, .grid-4, .reviews-grid, .steps-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .media-showcase-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 50px 0;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: none;
    box-shadow: var(--shadow-md);
  }
  .nav-links.show {
    display: flex;
  }
  .nav-actions {
    display: none;
  }
  .hero-title {
    font-size: 26px;
  }
  .hero-stats-grid, .grid-3, .grid-4, .grid-2, .reviews-grid, .steps-container {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}