/* ============================================================
   CloudMirror 公司官网 - 主样式表
   工业科技风格 · 响应式设计
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0a0e14;
  --bg-secondary: #111820;
  --bg-card: #161e2a;
  --bg-card-hover: #1c2736;
  --text-primary: #e8edf4;
  --text-secondary: #a0b4c8;
  --text-muted: #5e7488;
  --accent: #00b4d8;
  --accent-light: #48cae4;
  --accent-glow: rgba(0, 180, 216, 0.25);
  --green: #42df73;
  --green-glow: rgba(66, 223, 115, 0.2);
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Source Han Sans SC", Arial, sans-serif;
  --font-mono: "Cascadia Mono", "Cascadia Code", "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --- Background effect --- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(0, 180, 216, 0.08), transparent),
    radial-gradient(ellipse 50% 40% at 80% 90%, rgba(66, 223, 115, 0.04), transparent),
    radial-gradient(ellipse 40% 30% at 20% 40%, rgba(0, 180, 216, 0.03), transparent);
  pointer-events: none;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--accent-light); }

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

ul, ol { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.1rem; }

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  margin-bottom: 0.75rem;
}

.section-title p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 14, 20, 0.95);
  border-bottom-color: var(--border-light);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent), #0077b6);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.35rem 0;
  position: relative;
  transition: color var(--transition);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

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

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.5rem 1.4rem !important;
  border-radius: 50px;
  font-weight: 600 !important;
  transition: background var(--transition), box-shadow var(--transition) !important;
}

.nav-cta:hover {
  background: var(--accent-light);
  box-shadow: 0 0 24px var(--accent-glow);
}

.nav-cta::after { display: none !important; }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero Section --- */
.hero {
  padding: 8rem 0 6rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
  position: relative;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 650px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 6px 30px var(--accent-glow);
  transform: translateY(-1px);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-outline:hover {
  background: var(--bg-card);
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Stats --- */
.stats {
  padding: 3rem 0 5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  transition: all var(--transition);
}

.stat-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

/* --- Section Common --- */
.section {
  padding: 5rem 0;
}

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

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0, 180, 216, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Product Showcase --- */
.product-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.product-showcase.reverse {
  direction: rtl;
}

.product-showcase.reverse > * {
  direction: ltr;
}

.product-image {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  position: relative;
  overflow: hidden;
}

.product-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, var(--accent-glow), transparent 70%);
  opacity: 0.5;
}

.product-image .placeholder-text {
  position: relative;
  z-index: 1;
  font-size: 3rem;
  opacity: 0.3;
}

.product-info h2 {
  margin-bottom: 1rem;
}

.product-info .tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(66, 223, 115, 0.1);
  color: var(--green);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.product-info p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.feature-list {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.feature-list li::before {
  content: "✓";
  color: var(--green);
  font-weight: 700;
  font-size: 0.85rem;
}

/* --- About Page --- */
.about-hero {
  padding: 8rem 0 4rem;
  text-align: center;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  padding: 0 0 5rem;
}

.about-text h2 {
  margin-bottom: 1.25rem;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

.about-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
}

.value-card .value-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.value-card h4 {
  margin-bottom: 0.5rem;
}

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

/* --- Timeline --- */
.timeline {
  padding: 5rem 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 2rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

.timeline-body h4 {
  margin-bottom: 0.35rem;
}

.timeline-body p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- Products Page --- */
.products-hero {
  padding: 8rem 0 3rem;
  text-align: center;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  padding: 0 0 5rem;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--green));
  opacity: 0;
  transition: opacity var(--transition);
}

.product-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

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

.product-card .product-badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  background: rgba(0, 180, 216, 0.1);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.product-card h3 {
  margin-bottom: 0.75rem;
}

.product-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.product-specs {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.product-spec {
  text-align: center;
}

.product-spec .spec-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

.product-spec .spec-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Contact Page --- */
.contact-hero {
  padding: 8rem 0 3rem;
  text-align: center;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2rem;
  padding: 0 0 5rem;
}

.contact-info {
  display: grid;
  gap: 1rem;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: all var(--transition);
}

.contact-info-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
}

.contact-info-card .info-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 180, 216, 0.1);
  border-radius: var(--radius-sm);
}

.contact-info-card h4 {
  margin-bottom: 0.25rem;
}

.contact-info-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* --- Footer --- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 1rem;
  line-height: 1.7;
}

.footer-col h4 {
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 0.35rem 0;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* --- Page Header (inner pages) --- */
.page-header {
  padding: 8rem 0 3rem;
  text-align: center;
}

.page-header h1 {
  margin-bottom: 1rem;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- CTA Section --- */
.cta-section {
  padding: 5rem 0;
  text-align: center;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; opacity: 0; }
.animate-delay-2 { animation-delay: 0.2s; opacity: 0; }
.animate-delay-3 { animation-delay: 0.3s; opacity: 0; }
.animate-delay-4 { animation-delay: 0.4s; opacity: 0; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .product-showcase { grid-template-columns: 1fr; gap: 2rem; }
  .product-showcase.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 20, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform var(--transition);
  }

  .nav-links.active {
    transform: translateX(0);
  }

  .nav-links a {
    font-size: 1.2rem;
  }

  .nav-cta {
    font-size: 1.1rem !important;
  }

  .features-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-content { grid-template-columns: 1fr; }
  .about-values { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .hero { padding: 6rem 0 4rem; }
  .hero h1 { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
}

/* ============================================================
   新增组件：进度条 / 回顶 / 案例 / 参数表 / FAQ / 表单校验
   ============================================================ */

/* 滚动进度条 */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; z-index: 1002;
  background: linear-gradient(90deg, var(--accent), var(--green));
  width: 0; transition: width 0.1s ease;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* 回到顶部 */
.back-to-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 999;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--bg-card); border: 1px solid var(--border-light);
  color: var(--accent); font-size: 1.2rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: translateY(-3px); }

/* 数字计数动画支持 */
.stat-number[data-count] { font-variant-numeric: tabular-nums; }

/* 客户案例 */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.case-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: all var(--transition); cursor: pointer;
}
.case-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.35); }
.case-image {
  height: 140px; background: linear-gradient(135deg, rgba(0,180,216,0.15), rgba(66,223,115,0.08));
  display: flex; align-items: center; justify-content: center; font-size: 3rem;
  position: relative;
}
.case-image::after {
  content: ""; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--green)); opacity: 0; transition: opacity var(--transition);
}
.case-card:hover .case-image::after { opacity: 1; }
.case-body { padding: 1.5rem; }
.case-tag { display: inline-block; padding: 0.2rem 0.7rem; background: rgba(0,180,216,0.1); color: var(--accent); border-radius: 50px; font-size: 0.75rem; font-weight: 600; margin-bottom: 0.75rem; }
.case-body h3 { margin-bottom: 0.5rem; font-size: 1.05rem; }
.case-body p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }
.case-metric { display: flex; gap: 1.5rem; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.case-metric .metric-value { color: var(--green); font-weight: 700; font-size: 1.1rem; }
.case-metric .metric-label { color: var(--text-muted); font-size: 0.75rem; }

/* 参数对比表 */
.spec-table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
.spec-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.spec-table th, .spec-table td { padding: 1rem 1.25rem; text-align: left; border-bottom: 1px solid var(--border); }
.spec-table thead th { background: var(--bg-card); color: var(--text-primary); font-weight: 700; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.03em; }
.spec-table thead th:first-child { color: var(--text-muted); }
.spec-table tbody tr { transition: background var(--transition); }
.spec-table tbody tr:hover { background: var(--bg-card); }
.spec-table tbody td { color: var(--text-secondary); font-size: 0.9rem; }
.spec-table tbody td:first-child { color: var(--text-primary); font-weight: 600; white-space: nowrap; }
.spec-table .highlight-col { background: rgba(0,180,216,0.04); }
.spec-table .highlight-col td { color: var(--accent); font-weight: 600; }

/* FAQ 手风琴 */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 0.75rem; overflow: hidden; background: var(--bg-card); }
.faq-question {
  width: 100%; padding: 1.1rem 1.5rem; background: none; border: none;
  color: var(--text-primary); font-size: 1rem; font-weight: 600; font-family: inherit;
  display: flex; justify-content: space-between; align-items: center; cursor: pointer;
  text-align: left; transition: color var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question .faq-arrow { font-size: 0.8rem; color: var(--text-muted); transition: transform var(--transition); }
.faq-item.open .faq-question .faq-arrow { transform: rotate(180deg); color: var(--accent); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; padding: 0 1.5rem; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 1.5rem 1.25rem; }
.faq-answer p { color: var(--text-secondary); font-size: 0.93rem; line-height: 1.8; }

/* 表单校验 */
.form-group input.invalid, .form-group textarea.invalid, .form-group select.invalid {
  border-color: var(--red) !important;
  box-shadow: 0 0 0 3px rgba(255,76,76,0.15) !important;
}
.form-error { color: var(--red); font-size: 0.8rem; margin-top: 0.35rem; display: none; }
.form-error.visible { display: block; }

/* 响应式：案例 */
@media (max-width: 1024px) { .cases-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cases-grid { grid-template-columns: 1fr; } }

/* 2026 HOME EXPERIENCE — clearer hierarchy, product-led visuals */
:focus-visible{outline:3px solid var(--accent-light);outline-offset:4px}
.home-page .hero{min-height:760px;display:flex;align-items:center;text-align:left;padding:8.5rem 0 5.5rem}
.home-page .hero::before{left:72%;width:760px;height:760px}
.home-page .hero-layout{display:grid;grid-template-columns:minmax(0,.9fr) minmax(520px,1.1fr);gap:5rem;align-items:center}
.home-page .hero-copy{position:relative;z-index:1}
.home-page .hero-badge{display:inline-flex;align-items:center;gap:.55rem;background:rgba(22,30,42,.9);padding:.45rem .85rem}
.home-page .status-dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 5px rgba(66,223,115,.1)}
.home-page .hero h1{font-size:clamp(2.7rem,5vw,4.6rem);max-width:720px;line-height:1.08}
.home-page .hero p{margin:0 0 2rem;max-width:630px;font-size:1.05rem}
.home-page .hero-actions{justify-content:flex-start}
.hero-proof{display:flex;gap:1.4rem;flex-wrap:wrap;margin-top:2rem;color:var(--text-muted);font-size:.78rem;font-family:var(--font-mono)}
.hero-proof span{display:flex;align-items:center;gap:.45rem}.hero-proof span::before{content:"";width:5px;height:5px;background:var(--green);border-radius:50%}
.control-console{position:relative;background:#0c1219;border:1px solid rgba(72,202,228,.22);border-radius:18px;box-shadow:0 35px 90px rgba(0,0,0,.5),0 0 50px rgba(0,180,216,.08);overflow:hidden;font-family:var(--font-mono)}
.control-console::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.035) 48%,transparent 65%)}
.console-bar,.console-foot{display:flex;justify-content:space-between;align-items:center;padding:.8rem 1rem;background:#111a24;border-bottom:1px solid var(--border-light);color:var(--text-muted);font-size:.7rem;letter-spacing:.06em}
.console-online{color:var(--green);display:flex;gap:.45rem;align-items:center}.console-online i{width:6px;height:6px;border-radius:50%;background:var(--green)}
.console-body{display:grid;grid-template-columns:1.25fr .9fr;min-height:355px}
.machine-view{position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;background-image:linear-gradient(rgba(0,180,216,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(0,180,216,.05) 1px,transparent 1px);background-size:28px 28px;border-right:1px solid var(--border-light)}
.machine-view::before,.machine-view::after{content:"";position:absolute;width:1px;height:74%;background:rgba(0,180,216,.18)}.machine-view::after{width:74%;height:1px}
.machine-ring{width:178px;height:178px;border:1px solid rgba(0,180,216,.35);border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:inset 0 0 35px rgba(0,180,216,.08),0 0 35px rgba(0,180,216,.08);position:relative}
.machine-ring::before,.machine-ring::after{content:"";position:absolute;border:1px solid rgba(66,223,115,.35);border-radius:50%;inset:20px}.machine-ring::after{inset:-18px;border-style:dashed;border-color:rgba(0,180,216,.15)}
.machine-ring span{font-size:1.45rem;font-weight:700;color:var(--accent-light);letter-spacing:.08em}.machine-ring small{font-size:.66rem;color:var(--text-muted);margin-top:.3rem}
.scan-line{position:absolute;width:80%;height:1px;background:linear-gradient(90deg,transparent,var(--green),transparent);box-shadow:0 0 12px var(--green);animation:scan 3.4s ease-in-out infinite}
@keyframes scan{0%,100%{transform:translateY(-100px);opacity:.2}50%{transform:translateY(100px);opacity:.9}}
.axis-panel{padding:1rem;background:rgba(17,24,32,.7)}
.axis-head,.axis-row{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:.5rem}.axis-head{grid-template-columns:1fr auto;color:var(--text-muted);font-size:.65rem;padding:.4rem 0 .8rem;border-bottom:1px solid var(--border)}
.axis-row{padding:.78rem 0;border-bottom:1px solid var(--border);font-size:.72rem}.axis-row>span{color:var(--accent);font-weight:700}.axis-row b{color:var(--text-primary);font-weight:500}.axis-row i{font-style:normal;color:var(--green);font-size:.58rem}
.console-foot{border-top:1px solid var(--border-light);border-bottom:0}.console-foot strong{color:var(--accent-light);font-weight:600}
.home-page .stats{position:relative;z-index:2}
.home-page .feature-card{text-align:left;position:relative;padding-top:2.25rem}
.home-page .feature-icon{width:auto;height:auto;background:none;color:var(--accent);font:600 .72rem/1 var(--font-mono);margin-bottom:1.4rem;letter-spacing:.12em}
.home-page .feature-icon::after{content:"";display:inline-block;width:34px;height:1px;background:rgba(0,180,216,.35);margin-left:.65rem;vertical-align:middle}
.home-page .product-image{border-color:rgba(0,180,216,.16);background:#0d141d;overflow:hidden;padding:2rem}
.mock-window,.analytics-window{width:92%;height:82%;border:1px solid rgba(72,202,228,.22);background:#111a24;border-radius:10px;box-shadow:0 18px 50px rgba(0,0,0,.4);overflow:hidden}
.mock-toolbar{height:34px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:6px;padding:0 12px}.mock-toolbar span{width:6px;height:6px;border-radius:50%;background:var(--text-muted)}.mock-toolbar span:first-child{background:var(--accent)}
.mock-stage{height:calc(100% - 34px);position:relative;background-image:linear-gradient(rgba(0,180,216,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(0,180,216,.045) 1px,transparent 1px);background-size:24px 24px;display:flex;align-items:center;justify-content:center}
.tool-path{width:150px;height:150px;border:1px solid var(--accent);border-radius:48% 52% 46% 54%;box-shadow:0 0 28px rgba(0,180,216,.12);transform:rotate(-18deg);position:relative}.tool-path::after{content:"";position:absolute;inset:24px;border:1px dashed var(--green);border-radius:50%}
.mock-data{position:absolute;right:14px;bottom:12px;font:500 .58rem/1.8 var(--font-mono);color:var(--text-muted);text-align:right}
.analytics-window{padding:1.15rem;display:flex;flex-direction:column}.analytics-top{display:flex;justify-content:space-between;font:500 .7rem var(--font-mono);color:var(--text-secondary)}.analytics-top b{color:var(--green)}
.analytics-chart{height:58%;display:flex;align-items:flex-end;gap:8px;padding:1.5rem 0 1rem;border-bottom:1px solid var(--border)}.analytics-chart i{flex:1;background:linear-gradient(var(--accent),rgba(0,180,216,.08));border-radius:3px 3px 0 0}.analytics-chart i:nth-child(1){height:38%}.analytics-chart i:nth-child(2){height:62%}.analytics-chart i:nth-child(3){height:52%}.analytics-chart i:nth-child(4){height:78%}.analytics-chart i:nth-child(5){height:68%}.analytics-chart i:nth-child(6){height:92%}.analytics-chart i:nth-child(7){height:82%}
.analytics-cards{display:grid;grid-template-columns:1fr 1fr;gap:.7rem;margin-top:1rem}.analytics-cards span{background:#0c1219;padding:.7rem;border-radius:6px;color:var(--text-muted);font:500 .6rem var(--font-mono)}.analytics-cards b{display:block;color:var(--text-primary);font-size:.9rem;margin-top:.2rem}
.home-page .case-image{height:190px;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-end;padding:1.4rem;background-color:#0e1620;background-image:linear-gradient(135deg,rgba(0,180,216,.14),transparent 65%),repeating-linear-gradient(90deg,transparent 0 31px,rgba(255,255,255,.025) 32px);font-family:var(--font-mono);position:relative;overflow:hidden}
.home-page .case-image::before{content:"";position:absolute;width:180px;height:180px;border:1px solid rgba(72,202,228,.2);border-radius:50%;right:-30px;top:-50px;box-shadow:0 0 0 22px rgba(0,180,216,.03),0 0 0 44px rgba(0,180,216,.02)}
.home-page .case-image span{font-size:.62rem;letter-spacing:.15em;color:var(--accent);z-index:1}.home-page .case-image b{font-size:1rem;color:var(--text-primary);margin-top:.25rem;z-index:1}.home-page .case-vessel{background-image:linear-gradient(135deg,rgba(66,223,115,.1),transparent 65%),repeating-linear-gradient(90deg,transparent 0 31px,rgba(255,255,255,.025) 32px)}.home-page .case-nuclear{background-image:linear-gradient(135deg,rgba(255,184,0,.1),transparent 65%),repeating-linear-gradient(90deg,transparent 0 31px,rgba(255,255,255,.025) 32px)}
@media(max-width:1024px){.home-page .hero-layout{grid-template-columns:1fr;gap:3rem}.home-page .hero{padding-top:7.5rem}.control-console{max-width:720px}.home-page .hero::before{left:50%}}
@media(max-width:680px){.home-page .hero{min-height:auto;padding:6.5rem 0 4rem}.home-page .hero h1{font-size:2.35rem}.hero-proof{gap:.8rem 1rem}.console-body{grid-template-columns:1fr}.axis-panel{display:none}.machine-view{min-height:280px;border-right:0}.control-console{border-radius:12px}.console-bar{font-size:.58rem}.home-page .product-image{padding:1rem}.home-page .case-image{height:150px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.scan-line,.animate{animation:none!important}.btn,.feature-card,.product-card,.case-card{transition:none!important}}