:root {
  --primary: #d32f2f;
  --primary-dark: #b71c1c;
  --primary-light: #ffebee;
  --secondary: #ff5252;
  --accent: #ff7961;
  --text-main: #212121;
  --text-muted: #616161;
  --bg-page: #faf8f8;
  --bg-card: #ffffff;
  --border: #f0d5d5;
  --radius: 8px;
  --shadow: 0 4px 16px rgba(211, 47, 47, 0.08);
  --shadow-hover: 0 8px 24px rgba(211, 47, 47, 0.15);
  --transition: all 0.25s ease-in-out;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}
.header-wrapper {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo {
  height: 40px;
  width: auto;
  display: flex;
  align-items: center;
}
.brand-logo img {
  max-height: 38px;
  width: auto;
}
.brand-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary-dark);
  letter-spacing: 0.5px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}
.nav-links li a {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  border-radius: var(--radius);
}
.nav-links li a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  text-align: center;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(211, 47, 47, 0.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(211, 47, 47, 0.4);
  color: #ffffff;
}
.btn-outline {
  background: #ffffff;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--primary-dark);
  cursor: pointer;
  padding: 4px 8px;
}
.hero-section {
  position: relative;
  padding: 70px 0 50px;
  background: radial-gradient(circle at 85% 15%, #ffebee 0%, #ffffff 60%);
  border-bottom: 1px solid var(--border);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  border-radius: 20px;
  margin-bottom: 18px;
  border: 1px solid #ffcdd2;
}
.hero-title {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 800;
  color: #1a1a1a;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-title span {
  color: var(--primary);
}
.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 30px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}
.hero-stats-panel {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.stat-item {
  padding: 16px;
  background: #fffafa;
  border-radius: var(--radius);
  border-left: 4px solid var(--primary);
}
.stat-val {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 4px;
}
.stat-lbl {
  font-size: 13px;
  color: var(--text-muted);
}
.section {
  padding: 70px 0;
  position: relative;
}
.section-alt {
  background: #ffffff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}
.section-subtitle {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}
.section-title {
  font-size: 28px;
  font-weight: 800;
  color: #1a1a1a;
  margin-bottom: 12px;
}
.section-desc {
  font-size: 15px;
  color: var(--text-muted);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.card-grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: #ef9a9a;
}
.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 16px;
}
.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: #1a1a1a;
}
.card-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
}
.model-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}
.model-tag-item {
  background: #ffffff;
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #333333;
  box-shadow: 0 2px 6px rgba(0,0,0,0.03);
}
.model-tag-item:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}
.media-container {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #ffffff;
  display: flex;
  flex-direction: column;
}
.media-container img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.media-caption {
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  background: #ffffff;
}
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  position: relative;
}
.timeline-step {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  position: relative;
}
.step-num {
  font-size: 32px;
  font-weight: 900;
  color: #ffcdd2;
  line-height: 1;
  margin-bottom: 12px;
}
.step-title {
  font-size: 16px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
}
.step-desc {
  font-size: 13px;
  color: var(--text-muted);
}
.table-wrap {
  width: 100%;
  overflow-x: auto;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.eval-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}
.eval-table th, .eval-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.eval-table th {
  background: #fff5f5;
  color: var(--primary-dark);
  font-weight: 700;
  white-space: nowrap;
}
.eval-table tr:last-child td {
  border-bottom: none;
}
.eval-highlight {
  font-weight: 700;
  color: var(--primary);
}
.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: #ffebee;
  color: var(--primary-dark);
  border-radius: 12px;
  font-weight: 800;
  border: 1px solid #ef9a9a;
}
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #ffffff;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  background: none;
  border: none;
  font-size: 15px;
  font-weight: 700;
  color: #1a1a1a;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-question:hover {
  color: var(--primary);
}
.faq-icon {
  font-size: 18px;
  font-weight: bold;
  color: var(--primary);
  transition: transform 0.2s;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 20px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}
.faq-answer p {
  padding-bottom: 16px;
}
.faq-item.active .faq-answer {
  max-height: 200px;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.review-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.review-body {
  font-size: 14px;
  color: #424242;
  line-height: 1.7;
  margin-bottom: 16px;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid #fce4ec;
  padding-top: 14px;
}
.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
}
.author-meta {
  flex-grow: 1;
}
.author-name {
  font-size: 14px;
  font-weight: 700;
  color: #1a1a1a;
}
.author-role {
  font-size: 12px;
  color: var(--text-muted);
}
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.article-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.article-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.5;
}
.article-card p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.article-link {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
}
.article-link:hover {
  color: var(--primary-dark);
}
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #333333;
}
.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #dcdcdc;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.15);
}
textarea.form-control {
  resize: vertical;
  min-height: 100px;
}
.contact-info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
}
.contact-info-label {
  font-weight: 700;
  color: #1a1a1a;
  min-width: 80px;
}
.qr-box {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: #fffafa;
  border: 1px dashed #ef9a9a;
  border-radius: var(--radius);
}
.qr-box img {
  width: 90px;
  height: 90px;
  object-fit: contain;
  border-radius: 4px;
}
.qr-text h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 4px;
}
.qr-text p {
  font-size: 12px;
  color: var(--text-muted);
}
.footer-wrap {
  background: #1e1e1e;
  color: #bdbdbd;
  padding: 50px 0 24px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-col h4 {
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: #9e9e9e;
}
.footer-links a:hover {
  color: #ffffff;
}
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}
.friend-links a {
  color: #9e9e9e;
  font-size: 13px;
  background: #2a2a2a;
  padding: 4px 10px;
  border-radius: 4px;
}
.friend-links a:hover {
  color: #ffffff;
  background: var(--primary);
}
.footer-bottom {
  border-top: 1px solid #333333;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
}
.float-bar {
  position: fixed;
  right: 20px;
  bottom: 30px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
  cursor: pointer;
  border: none;
  font-size: 18px;
  font-weight: bold;
  transition: var(--transition);
}
.float-btn:hover {
  background: var(--primary-dark);
  transform: scale(1.08);
}
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}
@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
  }
  .nav-links.show {
    display: flex;
  }
  .nav-cta {
    display: none;
  }
  .hero-title {
    font-size: 28px;
  }
  .section {
    padding: 50px 0;
  }
  .section-title {
    font-size: 24px;
  }
}