/* ==========================================================================
   北京嘉怡博览科技有限公司 - 大疆浅色旗舰风格 (DJI Clean Light Tech Inspired)
   Design Language: Pure White, Platinum Gray, DJI Tech Cyan, Ultra Crisp Typography
   ========================================================================== */

:root {
  /* Clean Light Theme Color Palette - Mature Enterprise Grade */
  --bg-white: #ffffff;
  --bg-pure: #ffffff;
  --bg-subtle: #f9fbfd;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-gray-alt: #f3f6fa;
  --bg-footer: #f8fafc;

  /* Sophisticated Enterprise Accent (Restrained Tech Cyan & Classic Navy) */
  --accent-cyan: #0066cc;
  --accent-blue-deep: #0a2540;
  --accent-cyan-light: #0088ea;
  --accent-gradient: linear-gradient(135deg, #0a2540 0%, #0066cc 100%);
  --accent-subtle-glow: rgba(0, 102, 204, 0.05);

  /* Typography Colors - High Contrast, Restrained Elegance */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --border-light: #edf2f7;
  --border-card: #e2e8f0;
  --border-hover: #cbd5e1;

  /* Premium Transitions & Refined Subtle Elevation Shadows */
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --glass-nav: rgba(255, 255, 255, 0.92);
  --card-shadow: 0 1px 3px rgba(15, 23, 42, 0.03), 0 6px 16px rgba(15, 23, 42, 0.02);
  --card-shadow-hover: 0 4px 6px -1px rgba(15, 23, 42, 0.04), 0 16px 32px -4px rgba(15, 23, 42, 0.06);
  --container-max: 1280px;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-white);
  color: var(--text-primary);
  line-height: 1.6;
}

body {
  background-color: var(--bg-white);
  color: var(--text-primary);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Navigation Bar (DJI Minimalist Light Glass Header)
   ========================================================================== */
.dji-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 68px;
  background: var(--glass-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: var(--transition);
}

.dji-header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  height: 62px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
}

.brand-logo {
  height: 20px;
  width: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-brand:hover .brand-logo {
  transform: scale(1.05);
}

.brand-logo-img {
  height: 100%;
  width: auto;
  max-height: 20px;
  object-fit: contain;
  display: block;
}

.brand-logo-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.15rem;
  box-shadow: 0 4px 14px rgba(0, 112, 210, 0.25);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-cyan);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: width 0.3s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section (DJI Clean Light Cinematic)
   ========================================================================== */
.dji-hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 88px;
  overflow: hidden;
  background: var(--bg-white);
}

.hero-media-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  /* 采用左右多阶平滑渐变遮罩，使图片向两侧及边缘自然羽化融入纯白背景，完全无硬边 */
  -webkit-mask-image: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0) 0%,
    rgba(0, 0, 0, 0) 4%,
    rgba(0, 0, 0, 0.4) 12%,
    rgba(0, 0, 0, 0.85) 20%,
    rgba(0, 0, 0, 1) 28%,
    rgba(0, 0, 0, 1) 72%,
    rgba(0, 0, 0, 0.85) 80%,
    rgba(0, 0, 0, 0.4) 88%,
    rgba(0, 0, 0, 0) 96%,
    rgba(0, 0, 0, 0) 100%
  );
  mask-image: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0) 0%,
    rgba(0, 0, 0, 0) 4%,
    rgba(0, 0, 0, 0.4) 12%,
    rgba(0, 0, 0, 0.85) 20%,
    rgba(0, 0, 0, 1) 28%,
    rgba(0, 0, 0, 1) 72%,
    rgba(0, 0, 0, 0.85) 80%,
    rgba(0, 0, 0, 0.4) 88%,
    rgba(0, 0, 0, 0) 96%,
    rgba(0, 0, 0, 0) 100%
  );
}

.hero-media-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  filter: saturate(1.1);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.6) 65%, rgba(255, 255, 255, 0.95) 100%);
  z-index: 2;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 960px;
  padding: 40px 20px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(0, 112, 210, 0.08);
  border: 1px solid rgba(0, 112, 210, 0.18);
  border-radius: 980px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.hero-tag .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px rgba(0, 112, 210, 0.6);
}

.hero-title {
  font-size: clamp(2.4rem, 5.2vw, 4.2rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.8px;
  color: var(--text-primary);
  margin-bottom: 22px;
}

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

.hero-desc {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
  font-weight: 400;
  line-height: 1.75;
}

.hero-btn-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 26px;
  border-radius: 980px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-pill-primary {
  background: var(--text-primary);
  color: #ffffff;
}

.btn-pill-primary:hover {
  background: #2a303c;
  transform: translateY(-2px);
}

.btn-pill-outline {
  background: #ffffff;
  color: var(--text-primary);
  border: 1px solid var(--border-card);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.btn-pill-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-pill-glow {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(0, 112, 210, 0.28);
}

.btn-pill-glow:hover {
  box-shadow: 0 8px 26px rgba(0, 112, 210, 0.4);
  transform: translateY(-2px);
}

.hero-scroll-down {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: var(--text-tertiary);
  font-size: 1.3rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translate(-50%, 0); }
  40% { transform: translate(-50%, -10px); }
  60% { transform: translate(-50%, -5px); }
}

/* ==========================================================================
   Tech Metric HUD Bar (浅色高精数据仪表)
   ========================================================================== */
.dji-hud-bar {
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 40px 0;
  position: relative;
  z-index: 10;
}

.hud-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.hud-item {
  padding: 0 24px;
  border-right: 1px solid var(--border-light);
}

.hud-item:last-child {
  border-right: none;
}

.hud-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 6px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.hud-unit {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.hud-label {
  font-size: 0.88rem;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

/* ==========================================================================
   Section Header Styling
   ========================================================================== */
.section {
  padding: 120px 0;
  position: relative;
}

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

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 72px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.section-heading {
  font-size: clamp(2rem, 3.2vw, 2.6rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.6px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtext {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  font-weight: 400;
}

/* ==========================================================================
   DJI Flagship Panels (高端浅色大画幅旗舰卡片)
   ========================================================================== */
.flagship-panel {
  position: relative;
  background: #ffffff;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-card);
  margin-bottom: 48px;
  min-height: 480px;
  display: flex;
  align-items: center;
  transition: var(--transition);
  box-shadow: var(--card-shadow);
}

.flagship-panel:hover {
  border-color: var(--border-hover);
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-3px);
}

.flagship-panel.panel-reversed {
  flex-direction: row-reverse;
}

.flagship-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.flagship-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.92;
  transition: transform 0.8s ease;
}

.flagship-panel:hover .flagship-bg img {
  transform: scale(1.04);
}

.flagship-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    #ffffff 0%,
    #ffffff 35%,
    rgba(255, 255, 255, 0.98) 45%,
    rgba(255, 255, 255, 0.82) 58%,
    rgba(255, 255, 255, 0.5) 70%,
    rgba(255, 255, 255, 0.2) 82%,
    rgba(255, 255, 255, 0) 100%
  );
}

.panel-reversed .flagship-gradient {
  background: linear-gradient(
    270deg,
    #ffffff 0%,
    #ffffff 35%,
    rgba(255, 255, 255, 0.98) 45%,
    rgba(255, 255, 255, 0.82) 58%,
    rgba(255, 255, 255, 0.5) 70%,
    rgba(255, 255, 255, 0.2) 82%,
    rgba(255, 255, 255, 0) 100%
  );
}

.flagship-content {
  position: relative;
  z-index: 3;
  width: 55%;
  padding: 56px 64px;
  background: transparent;
}

.panel-reversed .flagship-content {
  background: transparent;
}

.panel-tag {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(0, 112, 210, 0.08);
  border: 1px solid rgba(0, 112, 210, 0.2);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.flagship-title {
  font-size: clamp(1.7rem, 2.6vw, 2.3rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.flagship-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
}

.flagship-spec-row {
  display: flex;
  gap: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--border-light);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-val {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.spec-lbl {
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

/* ==========================================================================
   全域科技生态 · 标准全屏单图轮播 (横向平滑滑动，中央主图+左右露半图，文字居中)
   ========================================================================== */
.pano-slider-wrap {
  position: relative;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  margin-top: 36px;
  margin-bottom: 20px;
  overflow: hidden;
}

/* 轮播主视口：严格全宽、隐藏溢出 */
.pano-slider-viewport {
  position: relative;
  width: 100%;
  height: 580px;
  overflow: hidden;
}

/* 横向滑动轨道 */
.pano-slider-track {
  display: flex;
  height: 100%;
  transition: transform 0.65s cubic-bezier(0.25, 1, 0.5, 1);
  will-change: transform;
}

/* 单张幻灯片：宽度70%，让中央居中时左右各露出15%（即半个相邻幻灯片），带间距与圆角景深感 */
.pano-slide {
  position: relative;
  flex: 0 0 70%;
  width: 70%;
  height: 100%;
  padding: 0 14px;
  box-sizing: border-box;
  overflow: hidden;
  user-select: none;
  opacity: 0.55;
  transform: scale(0.96);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}

.pano-slide.active {
  opacity: 1;
  transform: scale(1);
}

/* 幻灯片图片容器：铺满卡片区域并带精致微圆角 */
.pano-img-box {
  position: absolute;
  top: 0;
  left: 14px;
  right: 14px;
  bottom: 0;
  border-radius: 16px;
  overflow: hidden;
}

.pano-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* 压暗蒙层：保证居中文字在各种背景图片下清晰易读 */
.pano-backdrop-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    circle at center,
    rgba(10, 25, 47, 0.45) 0%,
    rgba(10, 25, 47, 0.75) 100%
  );
}

/* 文字浮层：叠加在图片上，水平+垂直完全居中 */
.pano-caption {
  position: absolute;
  top: 0;
  left: 14px;
  right: 14px;
  bottom: 0;
  padding: 40px 60px;
  color: #ffffff;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 0 auto;
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.pano-caption .pano-action {
  pointer-events: auto;
}

.pano-title {
  font-size: 2.3rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  line-height: 1.3;
  text-align: center;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.6);
}

.pano-desc {
  font-size: 1.08rem;
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: 0;
  text-align: center;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.5);
}

/* 左右切换箭头按钮 */
.pano-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  cursor: pointer;
  z-index: 10;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.pano-nav-btn:hover {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-50%) scale(1.08);
  box-shadow: 0 12px 30px rgba(0, 102, 204, 0.4);
}

.pano-nav-btn:active {
  transform: translateY(-50%) scale(0.96);
}

.pano-prev {
  left: 28px;
}

.pano-next {
  right: 28px;
}

/* 底部小圆点指示器 */
.pano-dots-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
  position: relative;
  z-index: 10;
}

.pano-dot {
  width: 10px;
  height: 10px;
  border-radius: 980px;
  background: var(--border-card);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.pano-dot:hover {
  background: var(--accent-cyan-light);
}

.pano-dot.active {
  width: 32px;
  background: var(--accent-gradient);
  box-shadow: 0 2px 10px rgba(0, 102, 204, 0.35);
}

/* 响应式适配 */
@media (max-width: 992px) {
  .pano-slider-viewport {
    height: 480px;
  }
  .pano-slide {
    flex: 0 0 80%;
    width: 80%;
    padding: 0 10px;
  }
  .pano-img-box {
    left: 10px;
    right: 10px;
  }
  .pano-caption {
    left: 10px;
    right: 10px;
    padding: 30px 40px;
  }
  .pano-title {
    font-size: 1.8rem;
  }
  .pano-desc {
    font-size: 0.95rem;
  }
  .pano-prev {
    left: 16px;
  }
  .pano-next {
    right: 16px;
  }
}

@media (max-width: 768px) {
  .pano-slider-viewport {
    height: 420px;
  }
  .pano-slide {
    flex: 0 0 88%;
    width: 88%;
    padding: 0 8px;
  }
  .pano-img-box {
    left: 8px;
    right: 8px;
  }
  .pano-caption {
    left: 8px;
    right: 8px;
    padding: 24px 20px;
  }
  .pano-title {
    font-size: 1.4rem;
  }
  .pano-desc {
    font-size: 0.88rem;
    -webkit-line-clamp: 2;
    margin-bottom: 16px;
  }
  .pano-nav-btn {
    width: 40px;
    height: 40px;
    font-size: 0.95rem;
  }
  .pano-prev {
    left: 10px;
  }
  .pano-next {
    right: 10px;
  }
}

/* ==========================================================================
   Showcase Gallery (白色卡片精选作品)
   ========================================================================== */
.showcase-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: 980px;
  background: #ffffff;
  border: 1px solid var(--border-card);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.filter-btn.active {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(0, 112, 210, 0.28);
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.showcase-card {
  background: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: 18px;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  box-shadow: var(--card-shadow);
  cursor: pointer;
}

.showcase-card.hide {
  display: none;
}

.showcase-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 36px rgba(0, 112, 210, 0.16);
}

.showcase-img-wrap {
  height: 230px;
  overflow: hidden;
  position: relative;
}

.showcase-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.showcase-card:hover .showcase-img-wrap img {
  transform: scale(1.1);
}

.showcase-pill {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-radius: 980px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 112, 210, 0.15);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.showcase-body {
  padding: 24px;
}

.showcase-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.showcase-desc {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* ==========================================================================
   Enterprise Architecture & Tech Foundation (科技架构底座)
   ========================================================================== */
.tech-matrix-box {
  background: transparent;
  border: none;
  padding: 0;
  box-shadow: none;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.matrix-item {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: 20px;
  padding: 40px 32px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: default;
}

/* 底部微光质感渐变光条（默认透明，Hover渐现并拉展） */
.matrix-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 24px;
  right: 24px;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transform: scaleX(0.4);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.matrix-item:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 112, 210, 0.35);
  box-shadow: 0 20px 38px rgba(0, 112, 210, 0.08), 0 4px 12px rgba(0, 0, 0, 0.03);
}

.matrix-item:hover::before {
  opacity: 1;
  left: 0;
  right: 0;
  transform: scaleX(1);
}

.matrix-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  transition: color 0.3s ease;
}

.matrix-item:hover .matrix-title {
  color: var(--accent-cyan);
}

.matrix-desc {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* ==========================================================================
   Footer (Enterprise Light Theme - 高端浅色纯净页脚，严禁暗色)
   ========================================================================== */
.dji-footer {
  background: var(--bg-footer);
  color: var(--text-primary);
  border-top: 1px solid var(--border-light);
  padding: 88px 0 44px;
}

.footer-nav-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand-col {
  padding-right: 48px;
}

.footer-logo-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.footer-col-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-primary);
  margin-bottom: 22px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--accent-cyan);
}

.footer-legal-bar {
  padding-top: 36px;
  border-top: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.legal-badges {
  display: flex;
  gap: 24px;
}

/* ==========================================================================
   Interactive Components (阅读进度条、回到顶部、作品弹窗、滚动动画)
   ========================================================================== */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--accent-gradient);
  z-index: 9999;
  transition: width 0.1s linear;
}

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  background: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: 50%;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: var(--transition);
  z-index: 900;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent-cyan);
  color: #ffffff;
  border-color: var(--accent-cyan);
  box-shadow: 0 8px 24px rgba(0, 112, 210, 0.35);
  transform: translateY(-4px);
}

/* Modal */
.project-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(17, 20, 26, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.project-modal-dialog {
  background: #ffffff;
  border-radius: 28px;
  max-width: 720px;
  width: 100%;
  overflow: hidden;
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.35);
  transform: scale(0.88) translateY(30px);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.project-modal-backdrop.active .project-modal-dialog {
  transform: scale(1) translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: var(--transition);
}

.modal-close-btn:hover {
  background: var(--text-primary);
  color: #ffffff;
}

.modal-media {
  height: 340px;
  position: relative;
  overflow: hidden;
}

.modal-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.project-modal-backdrop.active .modal-media img {
  transform: scale(1.03);
}
  height: 100%;
  object-fit: cover;
}

.modal-pill {
  position: absolute;
  bottom: 16px;
  left: 20px;
  padding: 4px 14px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-radius: 980px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 112, 210, 0.2);
}

.modal-content {
  padding: 32px 36px;
}

.modal-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.modal-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.modal-tags-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.modal-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

/* Reveal on Scroll Animations */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

   ========================================================================== */
@media (max-width: 1024px) {
  .hud-grid { grid-template-columns: repeat(2, 1fr); }
  .hud-item { border-right: none; margin-bottom: 20px; }
  .flagship-content { width: 70%; padding: 48px; }
  .bento-col-8, .bento-col-4, .bento-col-6 { grid-column: span 12; }
  .showcase-grid { grid-template-columns: repeat(2, 1fr); }
  .matrix-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-nav-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px);
    flex-direction: column;
    padding: 32px 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-light);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .flagship-panel { min-height: auto; flex-direction: column !important; }
  .flagship-gradient {
    background: linear-gradient(180deg, #ffffff 0%, #ffffff 50%, rgba(255, 255, 255, 0.9) 70%, rgba(255, 255, 255, 0) 100%) !important;
  }
  .flagship-content { width: 100%; padding: 36px 24px; background: transparent; }
  .flagship-spec-row { flex-wrap: wrap; gap: 20px; }
  .showcase-grid { grid-template-columns: 1fr; }
  .footer-nav-grid { grid-template-columns: 1fr; }
  .footer-legal-bar { flex-direction: column; align-items: flex-start; }
}