:root {
  --primary: #d91b29;
  --primary-hover: #b81422;
  --primary-light: #fff0f1;
  --primary-gradient: linear-gradient(135deg, #d91b29 0%, #ff4b4b 100%);
  --secondary: #ff7844;
  --text-main: #1f2329;
  --text-sub: #4e5969;
  --text-muted: #86909c;
  --bg-page: #faf9f8;
  --bg-card: #ffffff;
  --bg-subtle: #f4f2f0;
  --border-color: #edeae7;
  --border-hover: #ffc9cb;
  --shadow-sm: 0 2px 8px rgba(217, 27, 41, 0.04);
  --shadow-md: 0 8px 24px rgba(217, 27, 41, 0.08);
  --shadow-lg: 0 16px 36px rgba(217, 27, 41, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --max-w: 1240px;
  --transition: all 0.28s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.65;
  font-size: 15px;
  overflow-x: hidden;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-box {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo-wrap {
  width: 120px;
  height: 40px;
  display: flex;
  align-items: center;
}
.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}
.nav-wrapper {
  display: flex;
  align-items: center;
  gap: 20px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}
.nav-links a {
  padding: 8px 14px;
  font-weight: 500;
  color: var(--text-main);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
}
.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: 14.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  text-align: center;
}
.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(217, 27, 41, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(217, 27, 41, 0.4);
}
.btn-outline {
  border-color: var(--primary);
  color: var(--primary) !important;
  background: #ffffff;
}
.btn-outline:hover {
  background: var(--primary-light);
}
.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: var(--transition);
}

/* 首屏 Hero */
.hero-section {
  position: relative;
  padding: 70px 0 60px;
  background: radial-gradient(circle at 85% 15%, #ffe6e8 0%, #faf9f8 50%),
              radial-gradient(circle at 10% 90%, #fff1ea 0%, #faf9f8 50%);
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}
.hero-inner {
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  border: 1px solid #ffd5d8;
  padding: 6px 16px;
  border-radius: 30px;
  color: var(--primary);
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.hero-tag span {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 1.6s infinite;
}
@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}
.hero-title {
  font-size: 40px;
  font-weight: 900;
  line-height: 1.25;
  color: #11141a;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-title .highlight {
  color: var(--primary);
}
.hero-desc {
  font-size: 17px;
  color: var(--text-sub);
  max-width: 720px;
  margin: 0 auto 36px;
}
.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}
.stat-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}
.stat-val {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}
.stat-lbl {
  font-size: 13.5px;
  color: var(--text-sub);
}

/* 标签条 */
.model-strip {
  background: #ffffff;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
}
.model-strip-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  overflow-x: auto;
  scrollbar-width: none;
}
.model-strip-inner::-webkit-scrollbar {
  display: none;
}
.model-title {
  white-space: nowrap;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}
.model-tags {
  display: flex;
  gap: 10px;
  flex-wrap: nowrap;
}
.model-tag {
  white-space: nowrap;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-sub);
  font-weight: 500;
}

/* 通用Section */
.section {
  padding: 70px 0;
}
.section-subtle {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}
.section-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.section-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}
.section-desc {
  font-size: 15.5px;
  color: var(--text-sub);
}

/* 网格布局 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* 功能与服务卡片 */
.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}
.card-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 18px;
}
.card-title {
  font-size: 18px;
  font-weight: 700;
  color: #1a1d23;
  margin-bottom: 10px;
}
.card-text {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  flex-grow: 1;
}

/* 平台介绍 */
.intro-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.intro-content h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-main);
}
.intro-content p {
  color: var(--text-sub);
  margin-bottom: 20px;
  font-size: 15px;
}
.intro-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 24px;
}
.intro-list li {
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  padding: 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

/* 流程步骤 */
.steps-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.step-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}
.step-num {
  font-size: 32px;
  font-weight: 900;
  color: #f7d2d5;
  margin-bottom: 12px;
  line-height: 1;
}
.step-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-desc {
  font-size: 13.5px;
  color: var(--text-sub);
}

/* 对比评测 */
.review-highlight {
  background: linear-gradient(135deg, #fff5f5 0%, #fff 100%);
  border: 2px solid #ffd0d3;
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.review-score-box {
  display: flex;
  align-items: center;
  gap: 20px;
}
.score-badge {
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  text-align: center;
}
.score-badge .score-val {
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
}
.score-badge .score-max {
  font-size: 13px;
  opacity: 0.9;
}
.review-info h4 {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}
.stars {
  color: #ff9800;
  font-size: 18px;
  letter-spacing: 2px;
}
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: #ffffff;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 650px;
}
.compare-table th,
.compare-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
}
.compare-table th {
  background: #fdfaf9;
  font-weight: 700;
  color: var(--text-main);
}
.compare-table tr:last-child td {
  border-bottom: none;
}
.compare-table .highlight-col {
  background: #fff8f8;
  font-weight: 600;
  color: var(--primary);
}

/* 案例展示 */
.case-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.case-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-subtle);
}
.case-img-wrap.square {
  aspect-ratio: 1/1;
}
.case-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.case-card:hover .case-img-wrap img {
  transform: scale(1.04);
}
.case-body {
  padding: 20px;
}
.case-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
}
.case-title {
  font-size: 16.5px;
  font-weight: 700;
  margin-bottom: 8px;
}
.case-desc {
  font-size: 13.5px;
  color: var(--text-sub);
}

/* 用户评论 */
.comment-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;
}
.comment-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.user-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: 800;
  font-size: 16px;
}
.user-meta h5 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}
.user-meta span {
  font-size: 12.5px;
  color: var(--text-muted);
}
.comment-text {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* 常见问题 FAQ */
.faq-list {
  max-width: 880px;
  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;
  transition: var(--transition);
}
.faq-item.active {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}
.faq-q {
  padding: 18px 22px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-q::after {
  content: "+";
  font-size: 20px;
  color: var(--primary);
  transition: var(--transition);
}
.faq-item.active .faq-q::after {
  content: "−";
}
.faq-a {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.65;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq-item.active .faq-a {
  padding: 0 22px 18px 22px;
  max-height: 240px;
}

/* 资讯与百科 */
.article-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.article-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}
.article-item:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
}
.article-item a {
  font-weight: 600;
  color: var(--text-main);
  font-size: 14.5px;
}
.article-item a:hover {
  color: var(--primary);
}

/* 需求对接与加盟表单 */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
.contact-info-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.contact-item-box {
  margin-bottom: 24px;
}
.contact-item-box h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}
.contact-item-box p {
  color: var(--text-sub);
  font-size: 14px;
  margin-bottom: 4px;
}
.qr-wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 10px;
}
.qr-img {
  width: 120px;
  height: 120px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px;
  background: #ffffff;
}

.form-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}
.form-group {
  margin-bottom: 18px;
}
.form-label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}
.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-main);
  background: #fdfdfd;
  transition: var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(217, 27, 41, 0.1);
}
textarea.form-control {
  resize: vertical;
  min-height: 90px;
}

/* 宣传横幅 */
.promo-banner {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 50px;
}

/* 友情链接与文章调用区 */
.links-section {
  padding: 40px 0;
  background: #ffffff;
  border-top: 1px solid var(--border-color);
}
.links-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
}
.links-list a {
  font-size: 13.5px;
  color: var(--text-sub);
}
.links-list a:hover {
  color: var(--primary);
}

/* 页脚 */
.site-footer {
  background: #191c21;
  color: #b0b4ba;
  padding: 50px 0 24px;
  border-top: 3px solid var(--primary);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}
.footer-brand h4 {
  color: #ffffff;
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 13.5px;
  line-height: 1.6;
  max-width: 320px;
}
.footer-col h5 {
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: #9aa0a6;
  font-size: 13.5px;
}
.footer-links a:hover {
  color: #ffffff;
}
.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid #282c34;
  font-size: 13px;
  color: #727780;
}

/* 浮动客服 */
.floating-contact {
  position: fixed;
  right: 20px;
  bottom: 30px;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--primary);
  font-size: 18px;
  font-weight: 800;
  transition: var(--transition);
}
.float-btn:hover {
  background: var(--primary);
  color: #ffffff;
}

/* 响应式适配 */
@media (max-width: 992px) {
  .nav-wrapper {
    display: none;
  }
  .nav-wrapper.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
  }
  .nav-links {
    flex-direction: column;
    width: 100%;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links a {
    display: block;
    padding: 10px 0;
  }
  .nav-actions {
    width: 100%;
    margin-top: 12px;
  }
  .menu-toggle {
    display: block;
  }
  .grid-4, .hero-stats, .steps-wrap, .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .contact-grid, .intro-wrap {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 30px;
  }
}

@media (max-width: 600px) {
  .grid-2, .grid-4, .hero-stats, .steps-wrap, .footer-grid, .intro-list {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 24px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .btn-lg {
    width: 100%;
  }
}