/* ============================================
   交创智晟官网 — 样式表
   色彩：品牌蓝 #2563EB / AI紫 #7C3AED
   ============================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --ai-purple: #7C3AED;
  --ai-purple-light: #8B5CF6;
  --ai-bg: #F5F3FF;
  --accent: #3B82F6;
  --success: #10B981;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --text-light: #9CA3AF;
  --bg: #FFFFFF;
  --bg-gray: #F9FAFB;
  --bg-dark: #0F172A;
  --border: #E5E7EB;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: Inter, -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

/* ---------- 文字工具 ---------- */
.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-label.ai-label {
  color: var(--ai-purple);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  justify-content: center;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: 12px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  color: #fff;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.4);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.8);
}

.btn-white {
  background: #fff;
  color: var(--primary);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255,255,255,0.3);
}

.btn-full {
  width: 100%;
}

.btn-icon {
  font-size: 1.2rem;
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
}

.header.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: var(--shadow-md);
}

.header.scrolled .nav-link {
  color: var(--text);
}

.header.scrolled .nav-link.active,
.header.scrolled .nav-link:hover {
  color: var(--primary);
}

.header.scrolled .logo-text {
  color: var(--text);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 700;
}

.logo-img {
  width: 30px;
  height: 30px;
}

.logo-icon {
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  position: relative;
  top: 0.15em;
}

.logo-text {
  color: #fff;
  transition: color var(--transition);
  line-height: 1;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  position: relative;
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  border-radius: 1px;
  transition: width var(--transition);
}

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

.nav-link.active,
.nav-link:hover {
  color: #fff;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

.header.scrolled .menu-toggle span {
  background: var(--text);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #1a1040 100%);
  overflow: hidden;
}

.particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(124, 58, 237, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(37, 99, 235, 0.1) 0%, transparent 60%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 120px 0 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 100px;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.3);
  color: #C4B5FD;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 28px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ai-purple-light);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: 4.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.8;
  max-width: 560px;
  margin: 0 auto 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
}

.scroll-mouse {
  width: 26px;
  height: 40px;
  border-radius: 13px;
  border: 2px solid rgba(255,255,255,0.3);
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-dot {
  width: 3px;
  height: 8px;
  background: rgba(255,255,255,0.5);
  border-radius: 2px;
  animation: scroll-anim 2s infinite;
}

@keyframes scroll-anim {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ---------- Animations ---------- */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scroll-animate {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- About ---------- */
.about {
  background: var(--bg-gray);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}

.about-content .section-title {
  text-align: left;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.about-heading {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  line-height: 1.4;
}

.about-text {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1.02rem;
}

.about-highlights {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.highlight-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.highlight-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ai-bg);
  border-radius: 12px;
}

.highlight-item strong {
  font-size: 0.95rem;
  display: block;
  margin-bottom: 2px;
}

.highlight-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

/* About Visual - Stats Card */
.about-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-stats-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  width: 100%;
  max-width: 380px;
}

.about-stats-header {
  margin-bottom: 24px;
}

.about-stats-badge {
  display: inline-block;
  padding: 6px 16px;
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 100px;
}

.about-stats-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-stat-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg-gray);
  border-radius: 12px;
  transition: all var(--transition);
}

.about-stat-row:hover {
  background: var(--ai-bg);
  transform: translateX(6px);
}

.about-stat-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.about-stat-info {
  display: flex;
  flex-direction: column;
}

.about-stat-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ai-purple);
  line-height: 1.2;
}

.about-stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.about-stats-footer {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.about-stats-footer p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

.service-modes {
  margin-top: 80px;
}

/* ---------- AI Preview ---------- */
.ai-preview {
  background: var(--bg);
}

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

.ai-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  overflow: hidden;
  transition: all var(--transition);
}

.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--ai-purple);
}

.ai-card-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.06) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.ai-card:hover .ai-card-glow {
  opacity: 1;
}

.ai-card-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.ai-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.ai-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.ai-card-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ai-purple);
}

.ai-card-link:hover {
  color: var(--ai-purple-light);
}

/* ---------- Process ---------- */
.process {
  background: var(--bg-gray);
}

.process-timeline {
  position: relative;
  max-width: calc((100% - 40px) / 3);
  margin-left: calc((100% - 40px) / 3 + 20px - 30px);
  margin-bottom: 64px;
}

.process-line {
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--ai-purple));
  opacity: 0.2;
}

.process-step {
  display: flex;
  gap: 24px;
  margin-bottom: 36px;
  position: relative;
}

.process-step:last-child { margin-bottom: 0; }

.step-node {
  flex-shrink: 0;
  width: 60px;
  display: flex;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content {
  padding-top: 8px;
}

.step-content h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.step-ai-tag {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ai-purple);
  background: var(--ai-bg);
  border-radius: 100px;
  border: 1px solid rgba(124, 58, 237, 0.15);
}

/* ---------- Stats ---------- */
.stats {
  position: relative;
  padding: 80px 0;
  background: linear-gradient(135deg, #0F172A, #1a1040);
  overflow: hidden;
}

.stats-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  display: inline;
}

.stat-suffix {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--ai-purple-light);
  margin-top: -8px;
  display: inline;
}

.stat-item {
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
}

.stat-number,
.stat-suffix {
  display: inline-block;
}

.stat-label {
  width: 100%;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin-top: 8px;
}

/* ---------- AI Detail ---------- */
.ai-detail {
  background: var(--ai-bg);
}

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

/* ---------- 项目案例卡片网格 ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
}

.project-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--ai-purple);
}

.project-card .img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg-gray);
}

.project-card .img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.project-card:hover .img-wrap img {
  transform: scale(1.06);
}

.project-card .img-wrap .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(15, 23, 42, 0.55) 0%, transparent 55%);
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover .img-wrap .overlay {
  opacity: 1;
}

.project-card .tag-row {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
}

.project-card .tag-row span {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  color: #fff;
  letter-spacing: 0.04em;
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.25);
}

.project-card .card-body {
  padding: 22px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.project-card .card-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  transition: color var(--transition);
}

.project-card:hover .card-body h3 {
  color: var(--ai-purple);
}

.project-card .card-body p {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card .tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 6px;
}

.project-card .tech-tags span {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--ai-bg);
  color: var(--ai-purple);
  border: 1px solid rgba(124, 58, 237, 0.12);
}

/* ---------- 项目案例 Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
  padding: 24px;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-panel {
  position: relative;
  width: min(94vw, 960px);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transform: translateY(28px) scale(0.96);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.35s ease;
  box-shadow: 0 40px 120px rgba(15, 23, 42, 0.45);
}

.modal-overlay.active .modal-panel {
  transform: translateY(0) scale(1);
}

.modal-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: #fff;
  z-index: 5;
}

.modal-topbar .modal-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.modal-index {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--ai-purple);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.modal-cat {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.modal-close {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-gray);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}

.modal-close:hover {
  background: var(--ai-bg);
  color: var(--ai-purple);
  border-color: rgba(124, 58, 237, 0.3);
  transform: rotate(90deg);
}

.modal-close svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.modal-carousel-wrap {
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
  user-select: none;
  background: var(--bg-gray);
}

.modal-carousel {
  display: flex;
  min-height: 100%;
  transition: transform 0.65s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.modal-slide {
  min-width: 100%;
  display: flex;
  flex-direction: column;
}

.modal-slide-img {
  flex: 0 0 auto;
  min-height: 320px;
  max-height: 50vh;
  background: linear-gradient(135deg, #f8fafc, #eef2ff);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.modal-slide-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  cursor: zoom-in;
}

.modal-slide-info {
  flex: 0 0 auto;
  padding: 24px 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 10px;
  border-top: 1px solid var(--border);
  background: #fff;
}

.modal-slide-info::-webkit-scrollbar {
  width: 4px;
}

.modal-slide-info::-webkit-scrollbar-thumb {
  background: var(--text-light);
  border-radius: 2px;
}

.info-cat {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ai-purple);
}

.info-cat::before {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--ai-purple));
  border-radius: 1px;
}

.info-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.info-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

.info-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.info-tags span {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 6px;
  background: var(--ai-bg);
  color: var(--ai-purple);
  border: 1px solid rgba(124, 58, 237, 0.15);
}

@keyframes imgReveal {
  0% { opacity: 0; transform: translateY(24px) scale(0.97); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes infoReveal {
  0% { opacity: 0; transform: translateY(14px); }
  100% { opacity: 1; transform: translateY(0); }
}

.modal-slide.entering .modal-slide-img img {
  animation: imgReveal 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.modal-slide.entering .info-cat {
  animation: infoReveal 0.45s ease 0.18s both;
}

.modal-slide.entering .info-title {
  animation: infoReveal 0.45s ease 0.28s both;
}

.modal-slide.entering .info-desc {
  animation: infoReveal 0.45s ease 0.38s both;
}

.modal-slide.entering .info-tags {
  animation: infoReveal 0.45s ease 0.48s both;
}

.modal-nav {
  position: absolute;
  top: 29%;
  transform: translateY(-50%);
  z-index: 20;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-lg);
}

.modal-nav:hover {
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  color: #fff;
  border-color: transparent;
  transform: translateY(-50%) scale(1.08);
}

.modal-nav:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  transform: translateY(-50%);
}

.modal-nav:disabled:hover {
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  transform: translateY(-50%);
}

.modal-nav svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
}

.modal-nav.prev { left: 18px; }
.modal-nav.next { right: 18px; }

.modal-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 14px 16px 18px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  background: #fff;
}

.modal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  padding: 0;
}

.modal-dot.active {
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  width: 22px;
  border-radius: 100px;
}

.modal-key-hint {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 14px;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.7);
  pointer-events: none;
  z-index: 1;
  white-space: nowrap;
}

.modal-key-hint span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.modal-key-hint kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-family: inherit;
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.85);
}

.modal-gesture-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  color: var(--text-light);
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.4s;
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.9);
  padding: 6px 14px;
  border-radius: 100px;
  box-shadow: var(--shadow);
}

.modal-gesture-hint.show {
  opacity: 1;
}

.img-lightbox {
  position: fixed;
  inset: 0;
  z-index: 100000;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  animation: fadeIn 0.2s ease;
}

.img-lightbox img {
  max-width: 92vw;
  max-height: 92vh;
  object-fit: contain;
  border-radius: 4px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .modal-overlay { padding: 12px; }
  .modal-panel { width: 96vw; max-height: 94vh; }
  .modal-slide-img { flex: 0 0 50%; }
  .modal-slide-info { padding: 18px 20px 22px; }
  .modal-nav {
    width: 40px;
    height: 40px;
    top: 25%;
  }
  .modal-nav.prev { left: 10px; }
  .modal-nav.next { right: 10px; }
  .modal-key-hint { display: none; }
  .info-title { font-size: 1.1rem; }
  .modal-topbar { padding: 14px 18px; }
}

/* AI Products */
.ai-products {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}

.ai-product-card {
  display: flex;
  gap: 24px;
  padding: 32px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.ai-product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--ai-purple));
  opacity: 0;
  transition: opacity var(--transition);
}

.ai-product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--ai-purple);
}

.ai-product-card:hover::before {
  opacity: 1;
}

.ai-product-icon {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ai-bg);
  border-radius: 16px;
  font-size: 2rem;
}

.ai-product-content {
  flex: 1;
}

.ai-product-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.ai-product-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.ai-product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ai-product-tags span {
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--ai-bg);
  color: var(--ai-purple);
  border-radius: 100px;
  border: 1px solid rgba(124, 58, 237, 0.15);
}

.ai-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}

.matrix-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.matrix-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  opacity: 0;
  transition: opacity var(--transition);
}

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

.matrix-card:hover::before {
  opacity: 1;
}

/* Featured Matrix Card */
.matrix-card-featured {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.03), rgba(37, 99, 235, 0.02));
  border-color: rgba(124, 58, 237, 0.2);
}

.matrix-card-featured::before {
  opacity: 1;
  background: linear-gradient(135deg, var(--ai-purple), var(--primary));
}

.matrix-card-featured:hover {
  border-color: var(--ai-purple);
}

.matrix-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.matrix-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.matrix-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

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

.matrix-tags span {
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 500;
  background: var(--ai-bg);
  color: var(--ai-purple);
  border-radius: 6px;
  border: 1px solid rgba(124, 58, 237, 0.1);
}

/* AI Industry */
.ai-industry {
  margin-bottom: 80px;
}

.industry-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 28px;
}

.industry-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
}

.industry-tab {
  padding: 10px 24px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text-secondary);
}

.industry-tab.active {
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  color: #fff;
  border-color: transparent;
}

.industry-tab:hover:not(.active) {
  border-color: var(--ai-purple);
  color: var(--ai-purple);
}

.industry-panel {
  display: none;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border);
}

.industry-panel.active {
  display: block;
}

.ind-label {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  background: #FEE2E2;
  color: #DC2626;
  margin-bottom: 8px;
}

.ind-label.ind-ai {
  background: var(--ai-bg);
  color: var(--ai-purple);
}

.ind-label.ind-result {
  background: #D1FAE5;
  color: #059669;
}

/* Industry Detail Layout */
.industry-detail {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 40px;
  align-items: start;
}

.industry-left {
  text-align: center;
  padding: 20px;
  background: var(--bg-gray);
  border-radius: var(--radius);
}

.industry-icon-large {
  font-size: 3.5rem;
  margin-bottom: 16px;
}

.industry-left h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.industry-intro {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.industry-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.industry-tech-tags span {
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  background: #fff;
  color: var(--ai-purple);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: 100px;
}

/* Industry Flow */
.industry-flow {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.flow-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.flow-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-gray);
  border-radius: 12px;
  font-size: 1.3rem;
}

.flow-content {
  flex: 1;
}

.flow-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}

.flow-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.flow-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--ai-purple);
  font-weight: bold;
}

.flow-list li strong {
  color: var(--text);
}

/* Result Metrics */
.result-metrics {
  display: flex;
  gap: 24px;
  margin-top: 12px;
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 20px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(124, 58, 237, 0.08));
  border-radius: 12px;
  min-width: 100px;
}

.metric-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ai-purple);
  line-height: 1;
}

.metric-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 6px;
  text-align: center;
}

/* More Industries */
.industry-more {
  text-align: center;
  padding: 20px 0;
}

.more-intro {
  margin-bottom: 32px;
}

.more-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.more-intro h4 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.more-intro p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.7;
}

.more-industries {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 32px;
}

.more-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--bg-gray);
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  transition: all var(--transition);
}

.more-item:hover {
  background: var(--ai-bg);
  color: var(--ai-purple);
  transform: translateY(-2px);
}

.more-item-icon {
  font-size: 1.2rem;
}

/* Tech Stack - Premium Design */
.tech-stack {
  margin-top: 80px;
  padding: 60px 40px;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #1a1040 100%);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.tech-stack::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(37, 99, 235, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.tech-stack-header {
  text-align: center;
  margin-bottom: 48px;
  position: relative;
  z-index: 1;
}

.tech-stack-header h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.tech-stack-header p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 500px;
  margin: 0 auto;
}

/* Featured Models */
.tech-featured-models {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.featured-model-card {
  display: flex;
  gap: 24px;
  padding: 28px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.featured-model-card::before {
  content: '主推';
  position: absolute;
  top: 12px;
  right: -28px;
  padding: 4px 36px;
  background: linear-gradient(135deg, var(--ai-purple), var(--primary));
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  transform: rotate(45deg);
}

.featured-model-card:hover {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.06));
  border-color: rgba(124, 58, 237, 0.4);
  transform: translateY(-4px);
}

.featured-model-logo {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  font-weight: 800;
  font-size: 1rem;
  color: #fff;
}

.featured-model-logo.deepseek-logo {
  background: linear-gradient(135deg, #6366F1, #8B5CF6);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
}

.featured-model-logo.qwen-logo {
  background: linear-gradient(135deg, #FF6A00, #FF9500);
  box-shadow: 0 8px 24px rgba(255, 106, 0, 0.3);
}

.featured-model-logo span {
  font-size: 0.9rem;
  letter-spacing: -0.02em;
}

.featured-model-info {
  flex: 1;
}

.featured-model-info h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.featured-model-info p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.6;
  margin-bottom: 12px;
}

.featured-model-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.featured-model-tags span {
  padding: 4px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.8);
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Tech Features */
.tech-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
  position: relative;
  z-index: 1;
}

.tech-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(37, 99, 235, 0.08));
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: 14px;
  transition: all var(--transition);
}

.tech-feature-item:hover {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(37, 99, 235, 0.12));
  border-color: rgba(124, 58, 237, 0.4);
  transform: translateY(-3px);
}

.tech-feature-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.tech-feature-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.tech-feature-content p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.5;
  margin: 0;
}

.tech-stack-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 1;
}

.tech-category {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 24px;
  backdrop-filter: blur(10px);
  transition: all var(--transition);
}

.tech-category:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(124, 58, 237, 0.3);
  transform: translateY(-4px);
}

.tech-category-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tech-category-icon {
  font-size: 1.3rem;
}

.tech-category-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.02em;
}

.tech-category-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.tech-logo-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  transition: all var(--transition);
  cursor: default;
}

.tech-logo-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(4px);
}

.tech-logo-item span {
  font-size: 0.8rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
}

.tech-logo-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

/* Tech Logo Colors */
.tech-logo-icon.pytorch { background: linear-gradient(135deg, #EE4C2C, #FF6F61); }
.tech-logo-icon.tensorflow { background: linear-gradient(135deg, #FF6F00, #FFA726); }
.tech-logo-icon.huggingface { background: linear-gradient(135deg, #FFD21E, #FFEB3B); color: #333; }
.tech-logo-icon.sklearn { background: linear-gradient(135deg, #F89939, #3499CD); }
.tech-logo-icon.openai { background: linear-gradient(135deg, #10A37F, #1DB954); }
.tech-logo-icon.langchain { background: linear-gradient(135deg, #2DD4BF, #14B8A6); }
.tech-logo-icon.milvus { background: linear-gradient(135deg, #00A1EA, #0077B5); }
.tech-logo-icon.chromadb { background: linear-gradient(135deg, #FF5722, #E91E63); }
.tech-logo-icon.python { background: linear-gradient(135deg, #3776AB, #FFD43B); }
.tech-logo-icon.golang { background: linear-gradient(135deg, #00ADD8, #00A29C); }
.tech-logo-icon.java { background: linear-gradient(135deg, #ED8B00, #5382A1); }
.tech-logo-icon.nodejs { background: linear-gradient(135deg, #339933, #68A063); }
.tech-logo-icon.vue { background: linear-gradient(135deg, #42B883, #35495E); }
.tech-logo-icon.react { background: linear-gradient(135deg, #61DAFB, #282C34); }
.tech-logo-icon.typescript { background: linear-gradient(135deg, #3178C6, #235A97); }
.tech-logo-icon.flutter { background: linear-gradient(135deg, #02569B, #13B9FD); }
.tech-logo-icon.postgresql { background: linear-gradient(135deg, #336791, #4169E1); }
.tech-logo-icon.mysql { background: linear-gradient(135deg, #4479A1, #00758F); }
.tech-logo-icon.redis { background: linear-gradient(135deg, #DC382D, #A41E11); }
.tech-logo-icon.mongodb { background: linear-gradient(135deg, #47A248, #13AA52); }
.tech-logo-icon.docker { background: linear-gradient(135deg, #2496ED, #0DB7ED); }
.tech-logo-icon.k8s { background: linear-gradient(135deg, #326CE5, #4A90E2); }
.tech-logo-icon.nginx { background: linear-gradient(135deg, #009639, #00A651); }
.tech-logo-icon.github { background: linear-gradient(135deg, #333, #6e5494); }

/* 国产化技术 */
.tech-logo-icon.qwen { background: linear-gradient(135deg, #FF6A00, #FF9500); }
.tech-logo-icon.chatglm { background: linear-gradient(135deg, #1E88E5, #42A5F5); }
.tech-logo-icon.deepseek { background: linear-gradient(135deg, #6366F1, #8B5CF6); }
.tech-logo-icon.baichuan { background: linear-gradient(135deg, #EC4899, #F472B6); }

/* Featured tech item */
.tech-logo-item.featured {
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: 10px;
}

.tech-logo-item.featured:hover {
  background: rgba(124, 58, 237, 0.25);
  border-color: rgba(124, 58, 237, 0.5);
}

/* 私有化部署 */
.tech-logo-icon.ollama { background: linear-gradient(135deg, #1a1a1a, #404040); }
.tech-logo-icon.vllm { background: linear-gradient(135deg, #8B5CF6, #A78BFA); }
.tech-logo-icon.triton { background: linear-gradient(135deg, #76B900, #9ACD32); }
.tech-logo-icon.localai { background: linear-gradient(135deg, #0EA5E9, #38BDF8); }

/* 特殊分类样式 */
.tech-category-domestic {
  border-color: rgba(255, 107, 0, 0.3);
}

.tech-category-domestic:hover {
  border-color: rgba(255, 107, 0, 0.5);
}

.tech-category-private {
  border-color: rgba(139, 92, 246, 0.3);
}

.tech-category-private:hover {
  border-color: rgba(139, 92, 246, 0.5);
}

/* Services ---------- */
.services-detail {
  background: var(--bg-gray);
}

.tech-capabilities {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 80px;
}

.cap-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

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

.cap-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.cap-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.cap-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Service Modes */
.modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mode-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--border);
  text-align: center;
  position: relative;
  transition: all var(--transition);
}

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

.mode-highlight {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
}

.mode-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: linear-gradient(135deg, var(--primary), var(--ai-purple));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 100px;
}

.mode-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.mode-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.mode-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}





/* ---------- Footer ---------- */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand .logo-text {
  color: #fff;
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.7;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-col a,
.footer-contact-item {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 10px;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--ai-purple-light);
}

.footer-contact-item {
  margin-bottom: 10px;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
  text-decoration: none;
}

.footer-bottom a:hover {
  color: rgba(255,255,255,0.7);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .section-title { font-size: 2rem; }
  .hero-title { font-size: 3.2rem; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { order: -1; }
  .about-content .section-title { text-align: center; }
  .about-content { text-align: center; }
  .highlight-item { text-align: left; }
  .ai-preview-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .ai-products { grid-template-columns: 1fr; }
  .ai-product-card { padding: 24px; }
  .ai-matrix { grid-template-columns: repeat(2, 1fr); }
  .tech-capabilities { grid-template-columns: repeat(2, 1fr); }
  .modes-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .footer-main { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 1.75rem; }
  .hero-title { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-actions { flex-direction: column; align-items: center; }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 24px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
  }

  .nav.open { display: flex; }

  .nav-link {
    color: var(--text) !important;
    padding: 12px 0;
    font-size: 1rem;
  }

  .menu-toggle { display: flex; }

  .about-stats-card { padding: 24px; }
  .about-stat-row { padding: 12px; gap: 12px; }
  .about-stat-num { font-size: 1.3rem; }

  .ai-matrix { grid-template-columns: 1fr; }
  .ai-product-card { flex-direction: column; gap: 16px; }
  .ai-product-icon { width: 56px; height: 56px; font-size: 1.6rem; }
  .tech-capabilities { grid-template-columns: 1fr; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-number { font-size: 2.5rem; }


  .process-step { gap: 16px; }
  .step-node { width: 48px; }
  .step-number { width: 40px; height: 40px; font-size: 0.75rem; }
  .process-line { left: 23px; }

  .industry-tabs { flex-wrap: wrap; }
  .industry-panel { padding: 24px; }
  .industry-detail { grid-template-columns: 1fr; gap: 24px; }
  .industry-left { padding: 16px; }
  .result-metrics { flex-wrap: wrap; justify-content: center; gap: 12px; }
  .metric-item { min-width: 80px; padding: 12px 16px; }
  .more-industries { gap: 10px; }
  .more-item { padding: 10px 16px; font-size: 0.85rem; }
  .tech-stack { padding: 40px 24px; margin-top: 60px; }
  .tech-features { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .tech-feature-item { padding: 16px; }
  .tech-feature-icon { font-size: 1.5rem; }
  .tech-feature-content h4 { font-size: 0.88rem; }
  .tech-feature-content p { font-size: 0.75rem; }
  .tech-stack-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .tech-category { padding: 20px; }
  .tech-category-items { gap: 8px; }
  .tech-logo-item { padding: 8px 10px; }
  .tech-logo-icon { width: 28px; height: 28px; font-size: 0.75rem; }
  .tech-logo-item span { font-size: 0.75rem; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .section-title { font-size: 1.5rem; }
  .hero-badge { font-size: 0.75rem; padding: 6px 14px; }
  .footer-links { grid-template-columns: 1fr; }
  .tech-stack-grid { grid-template-columns: 1fr; }
  .tech-stack-header h3 { font-size: 1.4rem; }
  .tech-stack-header p { font-size: 0.88rem; }
  .tech-features { grid-template-columns: 1fr; }
  .tech-feature-item { gap: 12px; }
}