/* ============================================
   页面级样式 — Index / Services / Cases / About / Contact
   ============================================ */

/* ============ HERO ============ */
.hero {
  position: relative;
  padding: 160px 0 80px;
  background: linear-gradient(180deg, #f4f6fa 0%, #eef2f8 100%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center top, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center top, black 30%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
}
.hero-title {
  font-size: clamp(40px, 5.5vw, 64px);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin-bottom: 24px;
}
.hero-highlight {
  background: linear-gradient(135deg, #2563eb 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-desc {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero-trust {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.trust-item { display: flex; flex-direction: column; }
.trust-num {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.trust-num small { font-size: 18px; color: var(--primary); font-weight: 600; }
.trust-label {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 4px;
}
.trust-divider {
  width: 1px;
  height: 40px;
  background: var(--border-bright);
}

.hero-visual { position: relative; }
.hero-image-frame {
  position: relative;
  border-radius: var(--r-xl);
  overflow: visible;
  aspect-ratio: 4/3;
}
.hero-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--r-xl);
  box-shadow: 0 32px 80px rgba(15, 23, 42, 0.15);
}
.hero-float-card {
  position: absolute;
  background: white;
  padding: 16px 20px;
  border-radius: var(--r-md);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
}
.hero-float-1 {
  top: 32px;
  left: -32px;
  animation: float 6s ease-in-out infinite;
}
.hero-float-2 {
  bottom: 32px;
  right: -32px;
  animation: float 6s ease-in-out infinite 3s;
}
.float-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.float-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-display);
  margin-bottom: 2px;
}
.float-desc {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ============ TRUST BAR ============ */
.trust-bar {
  padding: 32px 0;
  background: white;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.trust-bar-label {
  text-align: center;
  font-size: 13px;
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-weight: 500;
}
.trust-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 500;
}
.trust-logos span:not(:nth-child(2n)) {
  color: var(--text-primary);
  font-weight: 600;
}

/* ============ SERVICE CARDS ============ */
.service-card {
  display: block;
  text-decoration: none;
  color: inherit;
}
.service-card .card-tags { margin-top: 16px; }

/* ============ CASES ============ */
.case-feature {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: block;
  text-decoration: none;
  color: inherit;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-bright);
}
.case-card-large {
  display: flex;
  flex-direction: column;
}
.case-card-large .case-image {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.case-card-large .case-body { padding: 32px; }
.case-card-large .case-title {
  font-size: 24px;
  margin-bottom: 16px;
  margin-top: 16px;
}
.case-card-large .case-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}
.case-image {
  overflow: hidden;
  background: var(--bg-muted);
}
.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.case-card:hover .case-image img { transform: scale(1.05); }
.case-body { padding: 20px; }
.case-card-small .case-image { aspect-ratio: 4/3; }
.case-card-small .case-title {
  font-size: 17px;
  margin-bottom: 6px;
  margin-top: 12px;
}
.case-card-small .case-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.case-meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.case-tag {
  display: inline-block;
  padding: 3px 8px;
  background: var(--primary-soft);
  color: var(--primary-dim);
  font-size: 11px;
  border-radius: 4px;
  font-weight: 600;
  font-family: var(--font-display);
  letter-spacing: 0.04em;
}
.case-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.case-grid-small {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 24px;
}
.case-stats {
  display: flex;
  gap: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.case-stat-num {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
  line-height: 1;
}
.case-stat-num span { font-size: 14px; color: var(--text-tertiary); margin-left: 2px; }
.case-stat-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* ============ STATS DARK ============ */
.stats-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 80px;
  align-items: end;
  margin-bottom: 80px;
}
.stats-head .section-title { margin-bottom: 0; }

/* ============ PROCESS ============ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
.process-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 32px 24px;
  position: relative;
  transition: all 0.3s ease;
}
.process-step:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.process-num {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  display: inline-block;
  padding: 4px 10px;
  background: var(--primary-soft);
  border-radius: 4px;
}
.process-step h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.process-step p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============ CTA ============ */
.cta-section { padding: var(--space-2xl) 0; }
.cta-card {
  background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 60%, #38bdf8 130%);
  border-radius: var(--r-xl);
  padding: 64px 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 48px;
  color: white;
  position: relative;
  overflow: hidden;
  flex-wrap: wrap;
}
.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  opacity: 0.6;
}
.cta-content { position: relative; max-width: 560px; }
.cta-title {
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: white;
  margin-bottom: 12px;
  line-height: 1.2;
}
.cta-desc {
  font-size: 17px;
  color: rgba(255,255,255,0.85);
  line-height: 1.6;
}
.cta-actions {
  display: flex;
  gap: 16px;
  position: relative;
  flex-wrap: wrap;
}
.cta-actions .btn-ghost {
  color: white;
  border-color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.08);
}
.cta-actions .btn-ghost:hover {
  background: white;
  color: var(--primary);
  border-color: white;
}

/* ============ Page Header ============ */
.page-header {
  padding: 160px 0 80px;
  background: linear-gradient(180deg, #f4f6fa 0%, #eef2f8 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center top, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center top, black 30%, transparent 70%);
}
.page-header h1 {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.035em;
  margin-bottom: 16px;
  position: relative;
}
.page-header p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.7;
  position: relative;
}
.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 24px;
  position: relative;
  font-family: var(--font-display);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb svg { width: 12px; height: 12px; opacity: 0.5; }

/* ============ Service Detail Pages ============ */
.service-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 64px 0;
}
.service-hero-text { max-width: 560px; }
.service-hero-text h1 {
  font-size: clamp(36px, 4.5vw, 48px);
  margin-bottom: 24px;
}
.service-hero-text p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}
.service-hero-image {
  border-radius: var(--r-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: var(--shadow-lg);
}
.service-hero-image img { width: 100%; height: 100%; object-fit: cover; }

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 64px;
}
.feature-item {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  display: flex;
  gap: 16px;
}
.feature-item-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-item-icon svg { width: 20px; height: 20px; }
.feature-item h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.feature-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* ============ Case Filter & List ============ */
.case-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.case-list .case-card { display: flex; flex-direction: column; }
.case-list .case-image { aspect-ratio: 16/10; }
.case-list .case-body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.case-list .case-title { font-size: 22px; margin: 12px 0; }
.case-list .case-desc { color: var(--text-secondary); font-size: 14px; line-height: 1.7; flex: 1; }

.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  padding: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  width: fit-content;
}
.filter-btn {
  padding: 8px 16px;
  background: transparent;
  border: none;
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}
.filter-btn:hover { color: var(--primary); }
.filter-btn.active {
  background: var(--primary);
  color: white;
}

/* ============ Service Detail List (services.html) ============ */
.service-detail-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.service-detail-card {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  position: relative;
}
.service-detail-card.reverse {
  grid-template-columns: 1.4fr 1.1fr;
}
.service-detail-card.reverse .service-detail-image { order: 2; }
.service-detail-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-bright);
}
.service-detail-num {
  position: absolute;
  top: 24px;
  left: 24px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: white;
  letter-spacing: 0.1em;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  padding: 4px 10px;
  border-radius: 4px;
  z-index: 2;
}
.service-detail-image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-muted);
}
.service-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.service-detail-card:hover .service-detail-image img { transform: scale(1.05); }
.service-detail-body {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.service-detail-body h3 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}
.service-detail-body > p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}
.service-detail-features {
  list-style: none;
  margin-bottom: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
}
.service-detail-features li {
  font-size: 14px;
  color: var(--text-primary);
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}
.service-detail-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 12px;
  height: 12px;
  background: var(--primary-soft);
  border-radius: 50%;
}
.service-detail-features li::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 10px;
  width: 6px;
  height: 3px;
  border-left: 1.5px solid var(--primary);
  border-bottom: 1.5px solid var(--primary);
  transform: rotate(-45deg);
}

/* ============ About Page ============ */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: center;
}
.about-intro-image {
  border-radius: var(--r-xl);
  overflow: hidden;
  aspect-ratio: 4/5;
  box-shadow: var(--shadow-lg);
}
.about-intro-image img { width: 100%; height: 100%; object-fit: cover; }
.about-intro-text h2 {
  font-size: clamp(32px, 4vw, 44px);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}
.about-intro-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.value-item {
  padding: 32px;
  background: var(--bg-card);
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
}
.value-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 16px;
}
.value-item h4 { font-size: 18px; margin-bottom: 8px; }
.value-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* ============ Contact Page ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 64px;
  align-items: start;
}
.contact-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 40px;
  position: sticky;
  top: 100px;
}
.contact-info h3 {
  font-size: 24px;
  margin-bottom: 8px;
}
.contact-info > p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 32px;
  line-height: 1.6;
}
.contact-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
}
.contact-item:first-of-type { border-top: none; padding-top: 0; }
.contact-item-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-item-icon svg { width: 20px; height: 20px; }
.contact-item-label {
  font-size: 12px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  font-family: var(--font-display);
  margin-bottom: 4px;
}
.contact-item-value {
  font-size: 17px;
  color: var(--text-primary);
  font-weight: 500;
  font-family: var(--font-display);
  line-height: 1.4;
}
.contact-item-value a:hover { color: var(--primary); }
.contact-item-sub {
  font-size: 15px;
  color: var(--accent);
  font-weight: 500;
  font-family: var(--font-display);
  margin-top: 4px;
  display: block;
}
.contact-item-sub a { color: var(--accent); }
.contact-item-sub a:hover { color: var(--primary); }

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 40px;
}
.contact-form h3 { font-size: 24px; margin-bottom: 8px; }
.contact-form > p { color: var(--text-secondary); font-size: 15px; margin-bottom: 32px; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ============ Responsive Additions ============ */
@media (max-width: 1024px) {
  .service-detail-card, .service-detail-card.reverse { grid-template-columns: 1fr; }
  .service-detail-card.reverse .service-detail-image { order: 0; }
  .service-detail-body { padding: 32px; }
  .service-detail-body h3 { font-size: 26px; }
  .service-detail-features { grid-template-columns: 1fr; }
  .case-feature { grid-template-columns: 1fr; }
  .case-grid-small { grid-template-rows: auto; grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-head { grid-template-columns: 1fr; gap: 24px; }
  .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .about-intro-image { aspect-ratio: 16/9; max-height: 360px; }
  .values-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-info { position: static; }
  .service-hero { grid-template-columns: 1fr; gap: 40px; }
  .feature-list { grid-template-columns: 1fr; }
  .case-list { grid-template-columns: 1fr; }
  .stats-head { grid-template-columns: 1fr; }
  .cta-card { padding: 48px 32px; flex-direction: column; align-items: flex-start; }
}
@media (max-width: 768px) {
  .hero { padding: 120px 0 60px; }
  .hero-float-1, .hero-float-2 { display: none; }
  .process-grid { grid-template-columns: 1fr; }
  .case-grid-small { grid-template-columns: 1fr; }
  .case-stats { flex-wrap: wrap; gap: 20px; }
  .form-row-2 { grid-template-columns: 1fr; }
  .contact-info, .contact-form { padding: 24px; }
}