:root {
  --primary: #10b981;
  --primary-dark: #059669;
  --primary-light: #d1fae5;
  --mint-bg: #f2fbf7;
  --mint-card: #ffffff;
  --mint-border: #a7f3d0;
  --mint-border-soft: #e6f7f0;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-sub: #64748b;
  --shadow-sm: 0 2px 8px rgba(16, 185, 129, 0.06);
  --shadow-md: 0 10px 25px -5px rgba(16, 185, 129, 0.1), 0 8px 10px -6px rgba(16, 185, 129, 0.05);
  --shadow-lg: 0 20px 30px -10px rgba(16, 185, 129, 0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --transition: all 0.28s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--mint-bg);
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(209, 250, 229, 0.6) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(167, 243, 208, 0.4) 0%, transparent 45%);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.site-container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--mint-border);
  box-shadow: 0 2px 15px rgba(16, 185, 129, 0.04);
}

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

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

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

.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-links a {
  padding: 8px 12px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}

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

.header-action {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 14.5px;
  border-radius: 30px;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.35);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  border: 1.5px solid var(--primary);
  color: var(--primary-dark) !important;
  font-weight: 600;
  font-size: 14.5px;
  border-radius: 30px;
  background: #ffffff;
  cursor: pointer;
  transition: var(--transition);
}

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-main);
  cursor: pointer;
  padding: 5px;
}

.section-block {
  padding: 70px 0;
  position: relative;
}

.section-title-wrap {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 46px;
}

.section-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 12px;
  border: 1px solid var(--mint-border);
}

.section-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 首屏 Hero (严禁图片) */
.hero-section {
  padding: 85px 0 60px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 880px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: 30px;
  font-size: 13.5px;
  color: var(--primary-dark);
  font-weight: 600;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--primary-light);
}

.hero-title {
  font-size: 40px;
  font-weight: 900;
  color: #064e3b;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-sub {
  font-size: 17.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 34px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-btn-main {
  font-size: 16px;
  padding: 14px 34px;
}

.hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 20px;
}

.hero-metric-card {
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.metric-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1.2;
  margin-bottom: 6px;
}

.metric-label {
  font-size: 13.5px;
  color: var(--text-sub);
  font-weight: 500;
}

/* 平台支持模型标签流 */
.models-ticker-wrap {
  background: #ffffff;
  border-top: 1px solid var(--mint-border-soft);
  border-bottom: 1px solid var(--mint-border-soft);
  padding: 24px 0;
  overflow: hidden;
}

.models-title {
  text-align: center;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-sub);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.model-tags-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.model-pill {
  background: var(--mint-bg);
  border: 1px solid var(--mint-border);
  color: var(--text-muted);
  font-size: 12.5px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  transition: var(--transition);
}

.model-pill:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary);
}

/* 核心能力与场景网格 */
.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.feature-card {
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.card-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
  font-weight: bold;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.card-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

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

.step-card {
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-md);
  padding: 26px 20px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.step-index {
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 24px;
  font-weight: 900;
  color: rgba(16, 185, 129, 0.2);
}

.step-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 13.5px;
  color: var(--text-muted);
}

/* 宣传图片展示区 */
.media-showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 30px;
}

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

.media-banner-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.media-img-wrap {
  width: 100%;
  overflow: hidden;
  background: #f0fdf4;
}

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

.media-card-info {
  padding: 18px 20px;
}

.media-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.media-card-desc {
  font-size: 13.5px;
  color: var(--text-muted);
}

.banner-strip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.banner-strip-card {
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.banner-strip-card img {
  width: 100%;
  height: auto;
  display: block;
}

/* 对比评测专属板块 */
.eval-box {
  background: #ffffff;
  border: 2px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.eval-score-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--mint-border-soft);
  margin-bottom: 28px;
}

.eval-score-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.score-badge {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  padding: 8px 20px;
  border-radius: 30px;
  font-size: 24px;
  font-weight: 800;
}

.score-meta h4 {
  font-size: 18px;
  color: var(--text-main);
  margin-bottom: 4px;
}

.score-meta p {
  font-size: 13.5px;
  color: var(--text-sub);
}

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

.eval-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 600px;
}

.eval-table th {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 700;
  padding: 14px 18px;
  font-size: 14.5px;
  border-bottom: 2px solid var(--mint-border);
}

.eval-table td {
  padding: 14px 18px;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--mint-border-soft);
}

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

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

/* 需求匹配与表单 */
.match-form-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 36px;
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.match-info-content h3 {
  font-size: 22px;
  color: var(--text-main);
  margin-bottom: 14px;
}

.match-info-content p {
  font-size: 14.5px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.match-benefit-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.match-benefit-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-main);
  font-weight: 500;
}

.match-benefit-list li::before {
  content: "✓";
  color: var(--primary-dark);
  font-weight: bold;
  background: var(--primary-light);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

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

.form-group-full {
  grid-column: span 2;
}

.form-label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-sm);
  background: var(--mint-bg);
  font-size: 14px;
  color: var(--text-main);
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

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

/* 用户评论 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

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

.review-stars {
  color: #f59e0b;
  font-size: 16px;
  margin-bottom: 12px;
}

.review-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
  font-style: italic;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--mint-border-soft);
  padding-top: 14px;
}

.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}

.reviewer-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-main);
}

.reviewer-role {
  font-size: 12.5px;
  color: var(--text-sub);
}

/* FAQ 折叠面板 */
.faq-accordion-wrap {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-question {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  background: #ffffff;
}

.faq-question:hover {
  background: #fafefd;
  color: var(--primary-dark);
}

.faq-icon {
  font-size: 18px;
  color: var(--primary);
  transition: transform 0.25s ease;
}

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

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

.faq-item.active .faq-answer {
  padding: 0 24px 20px;
  max-height: 300px;
}

/* 文章与百科 */
.articles-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.article-link-card {
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.article-link-card:hover {
  transform: translateX(4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.article-title-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
}

.article-badge-tag {
  font-size: 12px;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 3px 10px;
  border-radius: 12px;
  white-space: nowrap;
}

/* 联系我们与二维码 */
.contact-section-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.contact-card-box {
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.contact-info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.contact-info-list li {
  font-size: 14.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
}

.contact-info-list strong {
  color: var(--text-main);
}

.qr-display-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: #ffffff;
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.qr-img-wrapper {
  width: 170px;
  height: 170px;
  padding: 10px;
  background: var(--mint-bg);
  border: 1px dashed var(--primary);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* 页脚区域 */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--mint-border);
  padding: 50px 0 24px;
  color: var(--text-muted);
  font-size: 14px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 30px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}

.footer-col p {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

.footer-links-list a {
  color: var(--text-muted);
  font-size: 13.5px;
}

.footer-links-list a:hover {
  color: var(--primary-dark);
}

.friend-links-wrap {
  border-top: 1px solid var(--mint-border-soft);
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.friend-links-title {
  font-weight: 700;
  color: var(--text-main);
  font-size: 13.5px;
}

.friend-links-wrap a {
  color: var(--text-sub);
  font-size: 13.5px;
  background: var(--mint-bg);
  padding: 3px 10px;
  border-radius: 6px;
  border: 1px solid var(--mint-border-soft);
}

.friend-links-wrap a:hover {
  color: var(--primary-dark);
  border-color: var(--primary);
}

.footer-bottom-bar {
  border-top: 1px solid var(--mint-border-soft);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: var(--text-sub);
}

/* 浮动客服入口与返回顶部 */
.floating-widget {
  position: fixed;
  right: 20px;
  bottom: 30px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-btn {
  width: 48px;
  height: 48px;
  background: #ffffff;
  border: 1.5px solid var(--mint-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 20px;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: var(--transition);
}

.float-btn:hover {
  background: var(--primary);
  color: #ffffff;
  transform: scale(1.08);
}

/* 响应式断点 */
@media (max-width: 992px) {
  .hero-title {
    font-size: 32px;
  }
  .card-grid-3,
  .reviews-grid,
  .hero-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .card-grid-4,
  .flow-steps-grid,
  .banner-strip-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .match-form-wrap,
  .contact-section-wrap,
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .mobile-nav-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    border-bottom: 1px solid var(--mint-border);
    padding: 16px;
    gap: 8px;
    box-shadow: var(--shadow-md);
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 26px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .card-grid-3,
  .card-grid-4,
  .hero-metrics-grid,
  .flow-steps-grid,
  .media-showcase-grid,
  .banner-strip-grid,
  .reviews-grid,
  .articles-list-grid {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-group-full {
    grid-column: span 1;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn-primary,
  .hero-actions .btn-outline {
    width: 100%;
  }
  .eval-score-header {
    flex-direction: column;
    align-items: flex-start;
  }
}