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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg-primary);
  overflow-x: hidden;
  font-size: var(--text-base);
  min-height: 100vh;
}

/* ── Section Label ── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.bg-secondary {
  background: var(--color-bg-secondary);
}

/* ── Hero Top Metric ── */
.hero__metric {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.hero__metric-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── Cases Metrics Visual (Dashboard Style) ── */
.cases-metrics-visual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  grid-template-rows: auto auto;
  /* 视觉列 */
  width: 100%;
  max-width: min(100%, 760px);
}
.cases-metrics-visual .metric-card:first-child {
  grid-column: 1 / -1;
}
.metric-card {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(99,91,255,0.08);
  border-radius: 14px;
  padding: 18px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(99,91,255,0.06);
  animation: cardFloatIn 0.5s ease backwards;
  animation-delay: var(--delay, 0s);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(99,91,255,0.12);
}
.metric-card__icon {
  margin-bottom: 8px;
  display: flex;
  justify-content: center;
}
.metric-card__value {
  font-size: 26px;
  font-weight: 600;
  color: #1a1a2e;
  line-height: 1.2;
}
.metric-card__value--gradient {
  background: linear-gradient(135deg, #0A3DFF 0%, #7B61FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.metric-card__label {
  font-size: 14px;
  color: #667085;
  margin-top: 4px;
}
@keyframes cardFloatIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Filter Tabs (Accessible) ── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  padding: 0;
  margin-bottom: var(--space-6);
  role: tablist;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
  outline: none;
  font-family: var(--font-sans);
  user-select: none;
  -webkit-user-select: none;
}

.filter-btn:hover {
  color: var(--color-text-primary);
  background: var(--color-border-default);
  border-color: var(--color-border-hover);
}
.filter-btn:active {
  transform: scale(0.96);
}
.filter-btn:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

.filter-btn--active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.filter-btn--active:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  border-color: var(--color-primary-hover);
}

/* ── Tab Panels ── */
.tab-panel {
  visibility: visible;
  opacity: 1;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.tab-panel[hidden] {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  pointer-events: none;
  width: 100%;
}

/* ── Featured Cases ── */
.featured-cases {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.featured-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.featured-card:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  transform: translateY(-6px);
}

.featured-card__visual {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: linear-gradient(135deg, #f0f4ff 0%, #e8eeff 50%, #f0f8ff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.featured-card__visual-scene {
  width: 100%;
  height: 100%;
  position: relative;
}

.featured-card__visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(255,255,255,0.9) 100%);
  pointer-events: none;
}

.featured-card__header {
  padding: var(--space-6) var(--space-8) var(--space-3);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.featured-card__tags {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.featured-card__type {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-tertiary);
}

.featured-card__title {
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
  margin: 0;
  padding: 0 var(--space-8);
}

.featured-card__body {
  padding: var(--space-4) var(--space-8);
  flex: 1;
}

.featured-card__section {
  margin-bottom: var(--space-4);
}

.featured-card__section-label {
  font-size: 14px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-2);
}

.featured-card__challenge {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.featured-card__solution {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-info);
  background: var(--color-info-light);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-1);
}

.featured-card__results {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.featured-card__result {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.featured-card__result-label {
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}

.featured-card__footer {
  padding: var(--space-4) var(--space-8) var(--space-8);
  border-top: 1px solid var(--color-border-default);
  margin-top: auto;
}

.featured-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.featured-card__link:hover {
  color: var(--color-primary-hover);
}

.featured-card__link-arrow {
  transition: transform 0.2s ease;
  display: inline-block;
}

.featured-card:hover .featured-card__link-arrow {
  transform: translateX(3px);
}

/* ── Case Grid (2-column large cards) ── */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.case-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.case-card:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  transform: translateY(-6px);
}

.case-card__visual {
  position: relative;
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: linear-gradient(135deg, #f5f7ff 0%, #edf1ff 50%, #f5f9ff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-card__visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(255,255,255,0.85) 100%);
  pointer-events: none;
}

.case-card__body {
  padding: var(--space-6) var(--space-8);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.case-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.case-card__tags {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.case-card__type {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-weight: var(--font-weight-medium);
}

.case-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
  margin: 0 0 var(--space-4);
}

.case-card__section {
  margin-bottom: var(--space-4);
}

.case-card__section-label {
  font-size: 14px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-1);
}

.case-card__challenge {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.case-card__solution {
  display: inline-flex;
  align-items: center;
  padding: 3px var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-info);
  background: var(--color-info-light);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-1);
}

.case-card__results {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-top: auto;
}
.case-card__result {
  font-size: 28px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.case-card__result-label {
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}

.case-card__footer {
  padding: var(--space-4) var(--space-8);
  border-top: 1px solid var(--color-border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.case-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.case-card__link:hover {
  color: var(--color-primary-hover);
}

.case-card__link-arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}

.case-card:hover .case-card__link-arrow {
  transform: translateX(3px);
}

/* ── CTA Section ── */
.cta-section {
  position: relative;
  padding: var(--space-16) 0;
  overflow: hidden;
  background: linear-gradient(135deg, #0A1F5C 0%, #0A3DFF 50%, #7B61FF 100%);
}

.cta-section__content {
  position: relative;
  z-index: 2;
  max-width: 1080px;
  margin: 0 auto;
  text-align: center;
}

.cta-section__content h2 {
  color: var(--color-text-inverse);
  margin-bottom: var(--space-4);
}

.cta-section__content p {
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-8);
  font-size: var(--text-lg);
  line-height: var(--leading-loose);
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

/* ── Cases Section (compact layout, flex reorder) ── */

.section.section--cases {
  padding-top: clamp(32px, 4vw, 56px);
  padding-bottom: clamp(40px, 5vw, 72px);
  background:
    linear-gradient(180deg, #FFFFFF 0%, #F8FBFF 40%, #FFFFFF 100%),
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(10,61,255,0.025) 39px, rgba(10,61,255,0.025) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(10,61,255,0.025) 39px, rgba(10,61,255,0.025) 40px);
}

.section--cases > .container {
  display: flex;
  flex-direction: column;
}

/* Visually reorder: title → desc → tabs → cards */
.section-header--cases-primary {
  order: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto 0;
  padding-bottom: var(--space-4);
}

.section-header--cases-primary .section-header__title {
  margin-bottom: var(--space-2);
}

.section-header--cases-primary .section-header__desc {
  max-width: none;
}

.filter-bar {
  order: 2;
  padding: 0;
  margin-bottom: var(--space-6);
}

.featured-cases {
  order: 3;
}

/* Hide the duplicate section header */
.section-header--cases-secondary {
  display: none;
}

.case-grid {
  order: 3;
}

/* ── Section Header (legacy, kept for compatibility) ── */
.section-header {
  margin-bottom: var(--space-6);
}

.section-header__title {
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-text-primary);
  line-height: var(--leading-heading);
  margin-bottom: var(--space-3);
}

.section-header__desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-loose);
  max-width: 560px;
}

/* ── Case Detail Section (WeChat Optimized) ── */
.case-detail-section {
  padding: var(--space-16) 0;
  background: var(--color-bg-primary);
}
.case-detail-inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 var(--container-padding-inline);
}
.case-detail-title {
  font-size: 32px;
  font-weight: 400;
  line-height: 1.3;
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}
.case-detail-body {
  font-size: 17px;
  line-height: 1.85;
  color: var(--color-text-secondary);
}
.case-detail-body p {
  margin-bottom: var(--space-6);
}
.case-detail-body img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
}
.case-detail-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin: var(--space-10) 0;
  padding: var(--space-8);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
}
.case-detail-results__value {
  font-size: 36px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.1;
}
.case-detail-results__label {
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}
.case-detail-fixed-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border-default);
  padding: 12px var(--container-padding-inline);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  z-index: var(--z-sticky);
}
.case-detail-fixed-bar__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-default);
  background: var(--color-bg-primary);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
  text-decoration: none;
}
.case-detail-fixed-bar__btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}
.case-detail-fixed-bar__btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.case-detail-fixed-bar__btn--primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  box-shadow: 0 4px 14px rgba(10,61,255,0.28);
}

/* ── Balanced Layouts (>=1440px) ── */
/* 版心加宽后 1.618 分割会让首卡拉到 930px+、次卡缩到 580px，视觉失衡；改均衡双列 */
@media (min-width: 1440px) {
  .case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .featured-cases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .featured-cases {
    grid-template-columns: 1fr;
  }
  .case-grid {
    grid-template-columns: 1fr;
  }
  .case-detail-results {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .filter-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--space-2);
  }

  .featured-card__header,
  .featured-card__body,
  .featured-card__footer {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }

  .featured-card__title {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
    font-size: var(--text-xl);
  }

  .case-card__body {
    padding: var(--space-5) var(--space-6);
  }
  .case-card__footer {
    padding: var(--space-4) var(--space-6);
  }

  .cta-section__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .section-header__title {
    font-size: var(--text-2xl);
  }

  .case-detail-title {
    font-size: 28px;
  }
  .case-detail-body {
    font-size: 16px;
  }
  .case-detail-results {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  .case-detail-results__value {
    font-size: 28px;
  }
  .case-detail-fixed-bar {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
}

@media (max-width: 480px) {
  .featured-card__visual {
    height: 160px;
  }
  .case-card__visual {
    height: 140px;
  }
  .featured-card__results {
    flex-direction: column;
    gap: var(--space-4);
  }
  .case-card__results {
    flex-direction: column;
    gap: var(--space-3);
  }
}

/* ==========================================================================
   Global Layout
   ========================================================================== */

:root {
  --xlx-page-inset: 24px; /* <=390：左右各 12px */
  --xlx-page-gutter: 12px;
  --container-wide: calc(100vw - var(--xlx-page-inset));
  --container-main: calc(100vw - var(--xlx-page-inset));
  --container-content: calc(100vw - var(--xlx-page-inset));
  --container-padding-inline: 0px;
}

@media (min-width: 391px) {
  :root {
    --xlx-page-inset: 28px;
    --xlx-page-gutter: 14px;
  }
}

@media (min-width: 431px) {
  :root {
    --xlx-page-inset: 32px;
    --xlx-page-gutter: 16px;
  }
}

@media (min-width: 768px) {
  :root {
    --xlx-page-inset: 48px;
    --xlx-page-gutter: 24px;
  }
}

@media (min-width: 1024px) {
  :root {
    --xlx-page-inset: 72px;
    --xlx-page-gutter: 36px;
  }
}

@media (min-width: 1280px) {
  :root {
    --xlx-page-inset: 96px;
    --xlx-page-gutter: 48px;
  }
}

@media (min-width: 1440px) {
  :root {
    --xlx-page-inset: 144px;
    --xlx-page-gutter: 72px;
  }
}

@media (min-width: 1600px) {
  :root {
    --xlx-page-inset: 220px;
    --xlx-page-gutter: 110px;
  }
}

@media (min-width: 1920px) {
  :root {
    --xlx-page-inset: 360px;
    --xlx-page-gutter: 180px;
  }
}

/* 主背景继续全宽；这里只控制内部内容版心 */
.container,
.site-container,
.SiteHeader__inner {
  max-width: var(--container-main);
}

/* 防止网格/双栏子项因长文本撑破版心 */
.container > *,
.site-container > *,
.SiteHeader__inner > * {
  min-width: 0;
}


/* CTA */
.cta-section__actions .btn {
  transition: background-color .2s ease, border-color .2s ease, color .2s ease,
              box-shadow .2s ease, transform .2s ease;
}
.cta-section__actions .btn:hover {
  background: rgba(255,255,255,.14);
  color: #FFFFFF;
  border-color: rgba(255,255,255,.55);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,0,0,.14);
}
.cta-section__actions .btn:focus-visible {
  outline: 2px solid rgba(255,255,255,.90);
  outline-offset: 3px;
}
.cta-section__actions .btn:active { transform: translateY(0); }