/* 系统字体栈 - 不依赖外部字体 */
body {
  font-family: 
    -apple-system, 
    BlinkMacSystemFont, 
    "PingFang SC", 
    "Microsoft YaHei", 
    "Helvetica Neue", 
    Arial, 
    sans-serif !important;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 
    -apple-system, 
    BlinkMacSystemFont, 
    "Songti SC", 
    "SimSun", 
    "STSong", 
    serif !important;
}
/* ========================================
   京图瑞景 — 子页面共享样式 (Premium)
   ======================================== */

/* ——— Page Header Banner (Redesigned for clarity) ——— */
.page-header {
  background: var(--color-primary-dark);
  color: #fff;
  padding: 120px var(--space-lg) var(--space-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Single subtle top-light accent — no grid noise */
.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 320px;
  height: 3px;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.5) 40%, rgba(255,255,255,0.7) 50%, rgba(255,255,255,0.5) 60%, transparent 100%);
  pointer-events: none;
}

/* Subtle radial glow behind the content area only */
.page-header::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(37,99,235,0.35) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-header-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.page-header-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.18);
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.04em;
}

.page-header h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin: 0 auto var(--space-md);
  color: #ffffff;
  text-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.page-header p {
  font-size: 1.02rem;
  color: rgba(255,255,255,0.82);
  line-height: 1.8;
  max-width: 560px;
  margin: 0 auto;
}

/* ——— Breadcrumb (Premium) ——— */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border-light);
}

.breadcrumb a {
  color: var(--color-accent);
  transition: color var(--duration-fast);
  font-weight: 400;
}

.breadcrumb a:hover {
  color: var(--color-accent-dark);
}

.breadcrumb-sep {
  color: var(--color-border);
  font-size: 0.7rem;
}

.breadcrumb-current {
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ——— Page Content ——— */
.page-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

/* ——— Section Styles (reused across sub-pages) ——— */
.sub-section {
  margin-bottom: var(--space-2xl);
  position: relative;
}

.sub-section:last-child {
  margin-bottom: 0;
}

.sub-section h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-accent-light);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.01em;
}

.sub-section h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.005em;
}

.sub-section p {
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin-bottom: var(--space-md);
  font-size: 0.95rem;
}

/* ——— Service Detail Layout ——— */
.service-detail {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.service-detail-main {
  min-width: 0;
}

.service-detail-sidebar {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-light);
  align-self: start;
  box-shadow: var(--shadow-sm);
}

.service-detail-sidebar h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.sidebar-service-list {
  list-style: none;
  padding: 0;
}

.sidebar-service-list li {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-service-list li:last-child {
  border-bottom: none;
}

.sidebar-service-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: color var(--duration-fast), padding-left var(--duration-fast);
}

.sidebar-service-list a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.sidebar-service-list a.active {
  color: var(--color-accent);
  font-weight: 500;
}

.sidebar-service-list a::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent-light);
  flex-shrink: 0;
  box-shadow: 0 0 6px rgba(37, 99, 235, 0.2);
}

/* ——— Feature Grid (Premium) ——— */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition:
    transform var(--duration-normal) var(--ease-out-back),
    box-shadow var(--duration-normal),
    border-color var(--duration-normal),
    background var(--duration-normal);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-accent);
  background: var(--color-surface);
}

.feature-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.feature-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: rgba(37,99,235,0.08);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--duration-normal), color var(--duration-fast);
}

.feature-card:hover .feature-card-icon {
  background: var(--color-accent);
  color: #fff;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.75;
  margin: 0;
}

/* ——— Lab Service Cards (Premium) ——— */
.lab-service-detail h2 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lab-service-detail .lab-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(37,99,235,0.25);
}

.lab-process {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.lab-process-step {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  transition: background var(--duration-fast), transform var(--duration-fast);
}

.lab-process-step:hover {
  background: rgba(37,99,235,0.03);
  transform: translateX(4px);
}

.lab-process-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(37,99,235,0.2);
}

.lab-process-step h4 {
  color: var(--color-text);
  font-size: 1rem;
  margin-bottom: 4px;
}

.lab-process-step p {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  margin: 0;
  line-height: 1.7;
}

.lab-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0;
}

.lab-tech-tag {
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: rgba(37,99,235,0.06);
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(37,99,235,0.12);
  transition: background var(--duration-fast), border-color var(--duration-fast);
}

.lab-tech-tag:hover {
  background: rgba(37,99,235,0.12);
  border-color: rgba(37,99,235,0.2);
}

/* ——— Cases List (Premium) ——— */
.cases-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
  padding: 6px;
  background: var(--color-bg);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-light);
  width: fit-content;
}

.cases-filter-btn {
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast);
}

.cases-filter-btn:hover {
  color: var(--color-accent);
  background: rgba(37,99,235,0.06);
}

.cases-filter-btn.active {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 2px 12px rgba(37,99,235,0.25);
}

.cases-grid-sub {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.cases-grid-sub .case-card {
  transition: opacity 0.35s ease, transform 0.35s ease;
}

/* ——— Gallery Grid (Premium) ——— */
.gallery-sub-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.gallery-sub-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-normal);
}

.gallery-sub-item:hover {
  box-shadow: var(--shadow-lg);
}

.gallery-sub-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out-expo);
}

.gallery-sub-item:hover img {
  transform: scale(1.06);
}

.gallery-sub-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(10,22,40,0.75) 0%, rgba(10,22,40,0.2) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-lg);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.gallery-sub-item:hover .gallery-sub-overlay {
  opacity: 1;
}

.gallery-sub-label {
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.gallery-sub-desc {
  color: rgba(255,255,255,0.7);
  font-size: 0.82rem;
}

/* ——— News List (for sub-pages) ——— */
.news-list-sub {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-item-sub {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--duration-fast), padding-left var(--duration-fast);
  border-radius: var(--radius-sm);
  padding-left: var(--space-sm);
  padding-right: var(--space-sm);
}

.news-item-sub:hover {
  background: rgba(37,99,235,0.02);
  padding-left: var(--space-md);
}

.news-item-sub:last-child {
  border-bottom: none;
}

.news-date-wrap-sub {
  flex-shrink: 0;
  width: 68px;
  text-align: center;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 10px 6px;
  border: 1px solid var(--color-border-light);
}

.news-month-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.news-day-sub {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.7rem;
  color: var(--color-primary);
  line-height: 1.1;
  font-weight: 700;
}

.news-year-sub {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

.news-category-sub {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  background: rgba(37,99,235,0.08);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.news-title-sub {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.4;
}

.news-title-sub a {
  color: inherit;
  transition: color var(--duration-fast);
}

.news-title-sub a:hover {
  color: var(--color-accent);
}

.news-excerpt-sub {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin: 0;
}

/* ——— News Article Full Body ——— */
.news-body-sub {
  margin-top: var(--space-md);
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.9;
}

.news-body-sub p {
  margin-bottom: var(--space-md);
}

.news-body-sub h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-text);
  margin: var(--space-lg) 0 var(--space-sm);
  font-weight: 600;
}

.news-body-sub ul,
.news-body-sub ol {
  margin: var(--space-sm) 0 var(--space-md) 1.5em;
  line-height: 1.9;
}

.news-body-sub ul li,
.news-body-sub ol li {
  margin-bottom: 4px;
}

.news-body-sub table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-md) 0;
  font-size: 0.85rem;
}

.news-body-sub table th,
.news-body-sub table td {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.news-body-sub table thead th {
  background: var(--color-bg);
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.82rem;
}

.news-body-sub table tbody tr:hover {
  background: var(--color-bg);
}

/* ——— Video Page Enhancements ——— */
.video-showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.video-showcase-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--duration-normal), transform var(--duration-normal);
}

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

.video-showcase-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.video-showcase-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 30% 50%, rgba(37,99,235,0.25), transparent 60%),
    radial-gradient(circle at 70% 50%, rgba(37,99,235,0.1), transparent 50%);
}

.video-thumb-play {
  position: relative;
  z-index: 1;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-fast), transform var(--duration-fast);
}

.video-showcase-card:hover .video-thumb-play {
  background: rgba(255,255,255,0.35);
  transform: scale(1.1);
}

.video-showcase-body {
  padding: var(--space-md);
}

.video-showcase-body h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.video-showcase-body p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

.video-duration {
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-top: 6px;
  display: inline-block;
}

/* ——— Contact Form (Premium) ——— */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.contact-info-item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  border: 1px solid transparent;
  transition: background var(--duration-fast), border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.contact-info-item:hover {
  background: var(--color-surface);
  border-color: var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.contact-info-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(37,99,235,0.08), rgba(37,99,235,0.15));
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-item h3 {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.contact-info-item p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.65;
}

.contact-form {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--color-text);
  background: #fff;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.08);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

/* ——— CTA Banner (Premium) ——— */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-xl);
  text-align: center;
  color: #fff;
  margin-top: var(--space-2xl);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 40%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.05), transparent 70%);
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 30%;
  height: 60%;
  background: radial-gradient(ellipse, rgba(201,169,110,0.08), transparent 70%);
  pointer-events: none;
}

.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: #fff;
  border: none;
  padding: 0;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-lg);
  font-size: 0.98rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn {
  position: relative;
  z-index: 1;
}

/* ——— Responsive ——— */
@media (min-width: 640px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-sub-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .service-detail {
    grid-template-columns: 1fr 280px;
  }

  .cases-grid-sub {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: 1fr 1.2fr;
  }
}

@media (min-width: 1024px) {
  .gallery-sub-grid { grid-template-columns: repeat(3, 1fr); }
  .lab-process { grid-template-columns: repeat(2, 1fr); }
}

/* ========================================
   Contact Form Validation & Toast
   ======================================== */
.form-err {
  display: block;
  color: #dc2626;
  font-size: 0.78rem;
  margin-top: 4px;
  animation: formErrIn 0.25s ease;
}
@keyframes formErrIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.form-invalid {
  border-color: #dc2626 !important;
  box-shadow: 0 0 0 3px rgba(220,38,38,0.1);
}

.btn-success {
  background: #059669 !important;
  border-color: #059669 !important;
}

.form-toast {
  position: fixed;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-primary-dark);
  color: #fff;
  padding: 16px 32px;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.2);
  z-index: 10000;
  opacity: 0;
  transition: opacity 0.4s var(--ease-out-expo), transform 0.4s var(--ease-out-expo);
  pointer-events: none;
}
.form-toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}