:root {
  --primary: #4f46e5;
  --primary-glow: #6366f1;
  --secondary: #ec4899;
  --accent: #06b6d4;
  --accent-warm: #f59e0b;
  --dark-text: #1e1b4b;
  --body-text: #334155;
  --muted-text: #64748b;
  --bg-main: #f8fafc;
  --card-bg: #ffffff;
  --border-light: #e2e8f0;
  --gradient-main: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
  --gradient-warm: linear-gradient(135deg, #ec4899 0%, #f43f5e 50%, #f59e0b 100%);
  --gradient-cyan: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
  --shadow-md: 0 10px 25px -5px rgba(79, 70, 229, 0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-lg: 0 20px 30px -10px rgba(79, 70, 229, 0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.06) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(236, 72, 153, 0.06) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(6, 182, 212, 0.04) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(124, 58, 237, 0.06) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--body-text);
  line-height: 1.6;
  font-size: 15px;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

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

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

.brand-area img {
  height: 38px;
  width: auto;
  display: block;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark-text);
  letter-spacing: -0.5px;
}

.brand-badge {
  background: var(--gradient-main);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
}

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

.nav-links a {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--body-text);
  border-radius: var(--radius-sm);
}

.nav-links a:hover {
  color: var(--primary);
  background: rgba(79, 70, 229, 0.05);
}

.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: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-main);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(79, 70, 229, 0.35);
  color: #ffffff;
}

.btn-warm {
  background: var(--gradient-warm);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(236, 72, 153, 0.25);
}

.btn-warm:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(236, 72, 153, 0.35);
  color: #ffffff;
}

.btn-outline {
  background: #ffffff;
  color: var(--dark-text);
  border: 1px solid var(--border-light);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(79, 70, 229, 0.03);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--dark-text);
  padding: 4px;
}

.hero-section {
  padding: 70px 0 50px;
  position: relative;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(79, 70, 229, 0.08);
  border: 1px solid rgba(79, 70, 229, 0.2);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 24px;
  animation: pulse 3s infinite;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--dark-text);
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.hero-title span {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 800px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--muted-text);
  line-height: 1.7;
}

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

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

.stat-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 22px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

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

.stat-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-num.pink { color: var(--secondary); }
.stat-num.cyan { color: var(--accent); }
.stat-num.warm { color: var(--accent-warm); }

.stat-label {
  font-size: 13px;
  color: var(--muted-text);
  font-weight: 600;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--secondary);
  background: rgba(236, 72, 153, 0.1);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--dark-text);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--muted-text);
}

.models-badge-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}

.model-chip {
  background: #ffffff;
  border: 1px solid var(--border-light);
  color: var(--dark-text);
  font-weight: 700;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 30px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.model-chip:hover {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
}

.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;
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

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

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
  font-weight: 900;
  color: #ffffff;
}

.icon-blue { background: var(--gradient-main); }
.icon-pink { background: var(--gradient-warm); }
.icon-cyan { background: var(--gradient-cyan); }
.icon-amber { background: linear-gradient(135deg, #f59e0b, #d97706); }

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 12px;
}

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

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ftag {
  font-size: 11px;
  background: #f1f5f9;
  color: var(--body-text);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.media-gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.media-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease;
}

.media-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.media-img-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #e2e8f0;
  overflow: hidden;
}

.media-img-wrap.square {
  aspect-ratio: 1 / 1;
}

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

.media-info {
  padding: 20px;
}

.media-info h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 8px;
}

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

.compare-box {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

.score-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(236, 72, 153, 0.08));
  border: 1px solid rgba(79, 70, 229, 0.2);
  padding: 20px 28px;
  border-radius: var(--radius-md);
  margin-bottom: 28px;
}

.score-left h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--dark-text);
}

.score-left p {
  font-size: 13px;
  color: var(--muted-text);
}

.score-right {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.score-val {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--secondary);
  line-height: 1;
}

.score-total {
  font-size: 1.1rem;
  color: var(--muted-text);
  font-weight: 700;
}

.table-responsive {
  overflow-x: auto;
}

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

.compare-table th, .compare-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

.compare-table th {
  background: #f8fafc;
  color: var(--dark-text);
  font-weight: 800;
}

.compare-table tr:hover td {
  background: rgba(79, 70, 229, 0.02);
}

.badge-win {
  display: inline-block;
  background: #dcfce7;
  color: #15803d;
  font-weight: 800;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
}

.badge-lose {
  display: inline-block;
  background: #f1f5f9;
  color: #64748b;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
}

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

.step-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 24px 20px;
  border-radius: var(--radius-md);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.step-badge {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 14px;
}

.step-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 8px;
}

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

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.25s ease;
}

.faq-item.active {
  border-color: var(--primary);
}

.faq-header {
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 700;
  color: var(--dark-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-header::after {
  content: "+";
  font-size: 20px;
  color: var(--primary);
  font-weight: 700;
  transition: transform 0.3s ease;
}

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

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--muted-text);
  font-size: 14px;
  line-height: 1.7;
}

.faq-item.active .faq-body {
  max-height: 250px;
  padding: 0 24px 20px 24px;
}

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

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

.review-stars {
  color: #f59e0b;
  font-size: 14px;
  margin-bottom: 12px;
}

.review-text {
  font-size: 13.5px;
  color: var(--body-text);
  line-height: 1.65;
  margin-bottom: 18px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
}

.user-avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
}

.user-meta h4 {
  font-size: 14px;
  font-weight: 800;
  color: var(--dark-text);
}

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

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
}

.article-date {
  font-size: 12px;
  color: var(--secondary);
  font-weight: 700;
  margin-bottom: 6px;
}

.article-card h4 {
  font-size: 15px;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-card p {
  font-size: 13px;
  color: var(--muted-text);
  margin-bottom: 14px;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: start;
}

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

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

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: #f8fafc;
  color: var(--dark-text);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: #ffffff;
}

.form-textarea {
  resize: vertical;
  min-height: 110px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-box {
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.info-box h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 16px;
}

.info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14px;
}

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

.qr-box {
  display: flex;
  align-items: center;
  gap: 18px;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(236, 72, 153, 0.05));
  border: 1px dashed rgba(79, 70, 229, 0.3);
  padding: 16px;
  border-radius: var(--radius-md);
}

.qr-box img {
  width: 90px;
  height: 90px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: #fff;
  border: 1px solid var(--border-light);
}

.qr-text h4 {
  font-size: 14px;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 4px;
}

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

.footer-section {
  background: #111827;
  color: #9ca3af;
  padding: 60px 0 30px;
  border-top: 1px solid #1f2937;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  color: #ffffff;
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.7;
  margin-bottom: 16px;
  color: #9ca3af;
}

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

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: #9ca3af;
}

.footer-links-list a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.friend-links-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.friend-links-wrap a {
  color: #9ca3af;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
}

.friend-links-wrap a:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid #1f2937;
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #6b7280;
}

.floating-kefu {
  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(--gradient-main);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.4);
  cursor: pointer;
  transition: transform 0.3s ease;
  text-decoration: none;
}

.float-btn:hover {
  transform: scale(1.1);
  color: #ffffff;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(0.98); }
}

@media (max-width: 1024px) {
  .hero-title { font-size: 2.2rem; }
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .step-flow { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .site-container { padding: 0 16px; }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 16px 0;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--border-light);
  }
  .nav-links.show { display: flex; }
  .nav-links li { width: 100%; text-align: center; }
  .nav-links a { display: block; padding: 12px; }
  .menu-toggle { display: block; }
  .hero-title { font-size: 1.85rem; }
  .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid-3, .card-grid-2, .reviews-grid, .articles-grid, .media-gallery-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .step-flow { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .score-banner { flex-direction: column; text-align: center; gap: 14px; }
}