/**
 * 成都博能数智科技 - 官网样式
 * 极简深空科技风：深空蓝 + 科技银 + 活力青
 */
:root {
  --color-deep-space: #0a1628;
  --color-space-blue: #0d2137;
  --color-space-mid: #132f4c;
  --color-tech-silver: #c0c5ce;
  --color-tech-silver-light: #e8ecf0;
  --color-vitality-cyan: #00d4ff;
  --color-vitality-cyan-dim: #00a8cc;
  --color-primary: #00d4ff;
  --color-primary-dim: #00a8cc;
  --color-text: #e8ecf0;
  --color-text-muted: #94a3b8;
  --color-border: rgba(192, 197, 206, 0.15);
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: 0.25s ease;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --header-height: 74px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--color-deep-space); color: var(--color-text); line-height: 1.6; overflow-x: hidden; }

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

/* ===== 导航栏 ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0;
  background: rgba(10, 22, 40, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}
.header.scrolled { background: rgba(10, 22, 40, 0.98); padding: 12px 0; box-shadow: var(--shadow); }

.nav { display: flex; align-items: center; justify-content: flex-start; gap: 0; }
.nav-left { display: flex; align-items: center; gap: 48px; flex: 1; }
.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--color-text); font-weight: 600; font-size: 1.1rem; background: transparent; }
.logo-icon { color: var(--color-vitality-cyan); font-size: 1.25rem; }
.logo-img {
  height: 38px;
  width: auto;
  display: block;
  filter: brightness(1.15) contrast(1.1) drop-shadow(0 0 8px rgba(255, 255, 255, 0.15)) drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}
.logo-text { white-space: nowrap; }

.nav-links { display: flex; list-style: none; gap: 36px; align-items: center; margin: 0; padding: 0; }
.nav-links a {
  color: var(--color-tech-silver); text-decoration: none; font-size: 0.95rem; font-weight: 700;
  letter-spacing: 0.02em; padding: 8px 0; position: relative;
  transition: color var(--transition), box-shadow var(--transition);
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--color-vitality-cyan); transition: width var(--transition);
}
.nav-links a:hover { color: var(--color-vitality-cyan); }
.nav-links a:hover::after { width: 100%; }

.nav-cta { display: flex; gap: 12px; align-items: center; margin-left: auto; }
.btn-nav { padding: 8px 20px; font-size: 0.85rem; border-radius: var(--radius-sm); text-decoration: none; font-weight: 500; transition: var(--transition); }
.btn-nav.btn-primary { background: linear-gradient(135deg, var(--color-vitality-cyan), var(--color-vitality-cyan-dim)); color: var(--color-deep-space); }
.btn-nav.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-nav.btn-outline { border: 1px solid var(--color-tech-silver); color: var(--color-tech-silver); }
.btn-nav.btn-outline:hover { border-color: var(--color-vitality-cyan); color: var(--color-vitality-cyan); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--color-text); transition: var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

@media (max-width: 1024px) {
  .nav-cta { display: none; }
  .nav-links { gap: 24px; }
}
@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: 0; right: -100%; width: 280px; height: 100vh;
    background: var(--color-space-blue); flex-direction: column; padding: 80px 32px 32px;
    gap: 20px; transition: right var(--transition); box-shadow: -10px 0 30px rgba(0,0,0,0.4);
  }
  .nav-links.active { right: 0; }
  .nav-toggle { display: flex; z-index: 1001; }
}

/* ===== 悬浮按钮 ===== */
.floating-buttons {
  position: fixed; right: 24px; bottom: 24px; z-index: 999;
  display: flex; flex-direction: column; gap: 10px;
}
.float-btn {
  padding: 12px 20px; background: var(--color-space-mid); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); color: var(--color-text); text-decoration: none;
  font-size: 0.85rem; font-weight: 500; transition: var(--transition); cursor: pointer;
  box-shadow: var(--shadow); white-space: nowrap;
}
.float-btn:hover { background: var(--color-vitality-cyan); color: var(--color-deep-space); border-color: var(--color-vitality-cyan); }
.float-backtop { font-family: inherit; }

/* ===== 通用区块 ===== */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag { display: inline-block; color: var(--color-vitality-cyan); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.08em; margin-bottom: 12px; }
.section-title { font-size: clamp(1.5rem, 3.5vw, 2.25rem); font-weight: 600; color: var(--color-text); }
.section-lead {
  max-width: 640px;
  margin: 16px auto 0;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  font-weight: 400;
}

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 28px; font-size: 0.95rem; font-weight: 600; border-radius: var(--radius-md); text-decoration: none; transition: var(--transition); cursor: pointer; border: none; font-family: inherit; }
.btn-primary { background: linear-gradient(135deg, var(--color-vitality-cyan), var(--color-vitality-cyan-dim)); color: var(--color-deep-space); }
.btn-primary:hover { opacity: 0.95; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3); }
.btn-outline { background: transparent; border: 2px solid var(--color-tech-silver); color: var(--color-tech-silver); }
.btn-outline:hover { border-color: var(--color-vitality-cyan); color: var(--color-vitality-cyan); }
.btn-full { width: 100%; }

/* ===== Hero 通用 ===== */
.hero {
  min-height: calc(70vh - var(--header-height));
  margin-top: var(--header-height);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  padding: 60px 24px 80px;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; }
.hero .hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../images/banner-5.png");
  background-size: 100% auto;
  background-position: center top;
  background-repeat: no-repeat;
  opacity: 1;
  z-index: 0;
}
.hero#solutions-hero .hero-bg::before,
.hero#cases-hero .hero-bg::before,
.hero#about-hero .hero-bg::before {
  background-image: url("../images/3.jpg");
  opacity: 1;
}
.hero#solutions-hero .hero-gradient,
.hero#solutions-hero .hero-pattern,
.hero#cases-hero .hero-gradient,
.hero#cases-hero .hero-pattern,
.hero#about-hero .hero-gradient,
.hero#about-hero .hero-pattern {
  display: none;
}
/* 解决方案 / 关于我们 横幅：文案与按钮白字加粗（与 3.jpg 底图一致） */
.hero#solutions-hero .hero-title,
.hero#solutions-hero .hero-title .highlight,
.hero#solutions-hero .hero-desc,
.hero#about-hero .hero-title,
.hero#about-hero .hero-title .highlight,
.hero#about-hero .hero-desc {
  color: #fff;
  font-weight: 700;
}
.hero#solutions-hero .btn.btn-outline {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.9);
  font-weight: 700;
}
.hero#solutions-hero .btn.btn-outline:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}
/* 关于我们横幅副标题：较全局 hero-desc 加大约两档 */
.hero#about-hero .hero-desc {
  font-size: clamp(1rem, 2.75vw, 1.18rem);
  line-height: 1.55;
}
/* 标杆案例页横幅：与解决方案页一致，白字保证在 banner 图上可读 */
.hero#cases-hero .hero-title,
.hero#cases-hero .hero-title .highlight,
.hero#cases-hero .hero-desc {
  color: #fff;
  font-weight: 700;
}
.hero#cases-hero .hero-desc {
  font-weight: 500;
  max-width: 36em;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.65;
  text-shadow: 0 1px 12px rgba(10, 22, 40, 0.45);
}
.hero-gradient,
.hero-pattern {
  display: none;
}
.hero-content { position: relative; text-align: center; max-width: 800px; }
.hero#home .hero-content {
  min-height: calc(70vh - 200px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.hero-tag { display: inline-block; padding: 6px 16px; background: rgba(0, 212, 255, 0.15); color: var(--color-vitality-cyan); font-size: 0.7rem; font-weight: 500; border-radius: 100px; margin-bottom: 16px; }
.hero-title { font-size: clamp(1.38rem, 3.35vw, 2.28rem); font-weight: 600; line-height: 1.25; margin-bottom: 16px; }
.hero-title .highlight { color: var(--color-vitality-cyan); }
.hero-desc { font-size: 0.82rem; color: var(--color-text-muted); margin-bottom: 24px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 关于我们：使命 / 愿景 / 价值观 */
.about-intro-card {
  margin-bottom: 40px;
}
.about-intro-card p {
  margin: 0;
  line-height: 1.8;
  font-size: 1rem;
}
.about-mvv {
  margin-top: 8px;
}
.about-mvv-heading {
  text-align: center;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: var(--color-vitality-cyan);
  margin: 0 0 28px;
  text-transform: none;
}
.about-mvv-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}
@media (min-width: 900px) {
  .about-mvv-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    align-items: stretch;
  }
  .about-mvv-card--values {
    grid-column: 1 / -1;
  }
}
@media (min-width: 1100px) {
  .about-mvv-card--mission .about-mvv-lead,
  .about-mvv-card--vision .about-mvv-lead {
    white-space: nowrap;
    padding-right: 3rem;
  }
}
.about-mvv-card {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  padding: 32px 26px 30px;
  border: 1px solid rgba(0, 212, 255, 0.2);
  background:
    linear-gradient(155deg, rgba(0, 212, 255, 0.12), transparent 45%),
    linear-gradient(168deg, rgba(19, 47, 76, 0.85), rgba(10, 22, 40, 0.95));
  box-shadow:
    0 10px 36px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.about-mvv-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 16px 16px 0 0;
  background: linear-gradient(90deg, var(--color-vitality-cyan), rgba(0, 168, 204, 0.35));
}
.about-mvv-card:hover {
  border-color: rgba(0, 212, 255, 0.42);
  transform: translateY(-4px);
  box-shadow:
    0 16px 44px rgba(0, 0, 0, 0.32),
    0 0 0 1px rgba(0, 212, 255, 0.12) inset;
}
.about-mvv-card--mission::before {
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.95), rgba(0, 168, 204, 0.4));
}
.about-mvv-card--vision::before {
  background: linear-gradient(90deg, rgba(100, 210, 255, 0.9), rgba(0, 212, 255, 0.35));
}
.about-mvv-card--values::before {
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.75), rgba(120, 180, 255, 0.45));
}
.about-mvv-num {
  position: absolute;
  top: 18px;
  right: 16px;
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1;
  color: rgba(0, 212, 255, 0.1);
  pointer-events: none;
  user-select: none;
}
.about-mvv-label {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-vitality-cyan);
  margin-bottom: 18px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.12);
  border: 1px solid rgba(0, 212, 255, 0.28);
}
.about-mvv-lead {
  margin: 0;
  font-size: clamp(1.12rem, 2.4vw, 1.38rem);
  font-weight: 600;
  line-height: 1.65;
  color: #eef5fc;
  letter-spacing: 0.02em;
  padding-right: 2.5rem;
}

/* 产品架构图区域：内容水平居中 */
.product-arch {
  display: flex;
  justify-content: center;
  align-items: center;
}
.product-arch img {
  display: block;
  max-width: 100%;
  height: auto;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 卡片 ===== */
.card { background: rgba(19, 47, 76, 0.6); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 28px; transition: var(--transition); }
.card:hover { border-color: rgba(0, 212, 255, 0.3); transform: translateY(-4px); box-shadow: var(--shadow); }
.card-icon { font-size: 1.75rem; color: var(--color-vitality-cyan); margin-bottom: 16px; }
.card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.card p { color: var(--color-text-muted); font-size: 0.95rem; }

/* 首页 · 多行业场景卡片 */
.industry-section-lead { max-width: 720px; }
.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(248px, 1fr));
  gap: clamp(18px, 3vw, 26px);
}
.industry-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 28px 26px 26px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, rgba(19, 47, 76, 0.75) 0%, rgba(13, 33, 55, 0.55) 100%);
  border: 1px solid rgba(192, 197, 206, 0.12);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.industry-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--industry-accent, var(--color-vitality-cyan)), transparent);
  opacity: 0.95;
  pointer-events: none;
}
.industry-card::after {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, var(--industry-glow, rgba(0, 212, 255, 0.14)) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.7;
}
.industry-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 212, 255, 0.12);
}
.industry-card--aviation {
  --industry-accent: #38bdf8;
  --industry-glow: rgba(56, 189, 248, 0.22);
}
.industry-card--lowalt {
  --industry-accent: #22d3ee;
  --industry-glow: rgba(34, 211, 238, 0.22);
}
.industry-card--transport {
  --industry-accent: #a78bfa;
  --industry-glow: rgba(167, 139, 250, 0.22);
}
.industry-card--city {
  --industry-accent: #34d399;
  --industry-glow: rgba(52, 211, 153, 0.2);
}
.industry-card__icon {
  position: relative;
  z-index: 1;
  width: 2.95rem;
  height: 2.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  border-radius: 0.7rem;
  color: var(--industry-accent, var(--color-vitality-cyan));
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.22);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 4px 18px rgba(0, 0, 0, 0.2);
}
.industry-card--aviation .industry-card__icon {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.35);
}
.industry-card--lowalt .industry-card__icon {
  background: rgba(34, 211, 238, 0.12);
  border-color: rgba(34, 211, 238, 0.35);
}
.industry-card--transport .industry-card__icon {
  background: rgba(167, 139, 250, 0.12);
  border-color: rgba(167, 139, 250, 0.35);
}
.industry-card--city .industry-card__icon {
  background: rgba(52, 211, 153, 0.12);
  border-color: rgba(52, 211, 153, 0.32);
}
/* 图形略大于标题字号（标题 1.15rem），随根字号缩放 */
.industry-card__icon svg {
  width: 1.38rem;
  height: 1.38rem;
}
.industry-card__title {
  position: relative;
  z-index: 1;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0 0 8px;
  color: var(--color-text);
}
.industry-card__desc {
  position: relative;
  z-index: 1;
  flex: 1;
  margin: 0 0 20px;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}
.industry-card__cta {
  position: relative;
  z-index: 1;
  margin-top: auto;
  padding: 10px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  border-width: 1.5px;
}
.industry-card:hover .industry-card__cta {
  border-color: var(--industry-accent, var(--color-vitality-cyan));
  color: var(--industry-accent, var(--color-vitality-cyan));
}

/* 解决方案页：行业痛点 / 方案定位 / 落地场景 标题前图标 */
.solution-aspect-card h3 {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
  font-size: 1.12rem;
  font-weight: 600;
  color: #e8f1f8;
  letter-spacing: 0.02em;
}
.solution-aspect-card h3::before {
  content: "";
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background-color: rgba(0, 212, 255, 0.1);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 24px 24px;
  border: 1px solid rgba(0, 212, 255, 0.28);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.solution-aspect-card--pain h3::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300d4ff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M10.29 3.86L1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0z'/%3E%3Cline x1='12' y1='9' x2='12' y2='13'/%3E%3Cline x1='12' y1='17' x2='12.01' y2='17'/%3E%3C/svg%3E");
}
.solution-aspect-card--focus h3::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300d4ff' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Ccircle cx='12' cy='12' r='6'/%3E%3Ccircle cx='12' cy='12' r='2'/%3E%3Cline x1='12' y1='2' x2='12' y2='4'/%3E%3Cline x1='12' y1='20' x2='12' y2='22'/%3E%3Cline x1='2' y1='12' x2='4' y2='12'/%3E%3Cline x1='20' y1='12' x2='22' y2='12'/%3E%3C/svg%3E");
}
.solution-aspect-card--scene h3::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300d4ff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolygon points='12 2 2 7 12 12 22 7 12 2'/%3E%3Cpolyline points='2 17 12 22 22 17'/%3E%3Cpolyline points='2 12 12 17 22 12'/%3E%3C/svg%3E");
}

.page-solutions #aviation,
.page-solutions #lowalt,
.page-solutions #transport,
.page-solutions #station {
  scroll-margin-top: calc(var(--header-height) + 16px);
}
.page-solutions .section {
  padding: 76px 0 92px;
}
.page-solutions .solution-section-head {
  margin-bottom: 40px;
}
.page-solutions .solution-section-head .section-title {
  margin-top: 6px;
}
.solution-hero-anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
}
.solution-hero-anchor {
  padding: 10px 20px;
  font-size: 0.88rem;
}

.page-solutions .solution-aspect-card {
  margin-bottom: 0;
  border-radius: 14px;
  padding: 26px 28px;
  background:    
    linear-gradient(150deg, rgba(0, 212, 255, 0.07), transparent 42%),
    linear-gradient(165deg, rgba(19, 47, 76, 0.78), rgba(10, 22, 40, 0.94));
  border: 1px solid rgba(0, 212, 255, 0.16);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.page-solutions .solution-aspect-card:hover {
  border-color: rgba(0, 212, 255, 0.32);
}
.page-solutions .solution-aspect-card--pain {
  border-left: 3px solid rgba(0, 212, 255, 0.55);
}
.page-solutions .solution-aspect-card--focus {
  border-left: 3px solid rgba(100, 200, 255, 0.42);
}
.page-solutions .solution-aspect-card--scene {
  border-left: 3px solid rgba(0, 168, 204, 0.48);
}
.page-solutions .solution-aspect-card p {
  line-height: 1.75;
  margin-bottom: 0;
}

.solution-aviation-main,
.solution-lowalt-main,
.solution-cards-column {
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.solution-cards-column {
  max-width: 56rem;
  margin: 0 auto;
}

.solution-aviation-visual,
.solution-lowalt-visual {
  margin: 0;
  padding: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.26);
  background:
    linear-gradient(165deg, rgba(0, 212, 255, 0.08), rgba(10, 22, 40, 0.6));
  box-shadow:
    0 12px 44px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.07);
}
.solution-aviation-visual img,
.solution-lowalt-visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* 智慧民航：左文右图 */
.solution-aviation-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
@media (min-width: 960px) {
  .solution-aviation-layout {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 38%);
    gap: 40px;
    align-items: stretch;
  }
  .solution-aviation-visual {
    position: sticky;
    top: calc(var(--header-height) + 24px);
    align-self: flex-start;
  }
}

/* 低空经济：上图下文（全端一致） */
.solution-lowalt-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: stretch;
}
.solution-lowalt-visual {
  max-width: 56rem;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
}
.solution-lowalt-main {
  max-width: 56rem;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
}

/* 产品页：本体论统一建模卡片背景图 */
.card-model-bg {
  background-image:
    linear-gradient(rgba(10, 22, 40, 0.66), rgba(10, 22, 40, 0.66)),
    url("../images/7.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.card-model-bg h3,
.card-model-bg p {
  color: #eef5fb;
}

/* 产品页：物理智能驱动卡片背景图 */
.card-physics-bg {
  background-image:
    linear-gradient(rgba(10, 22, 40, 0.66), rgba(10, 22, 40, 0.66)),
    url("../images/8.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.card-physics-bg h3,
.card-physics-bg p {
  color: #eef5fb;
}

/* 产品页：业务孪生适配卡片背景图 */
.card-business-bg {
  background-image:
    linear-gradient(rgba(10, 22, 40, 0.66), rgba(10, 22, 40, 0.66)),
    url("../images/9.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.card-business-bg h3,
.card-business-bg p {
  color: #eef5fb;
}

/* 产品页：具身智能闭环卡片背景图 */
.card-embodied-bg {
  background-image:
    linear-gradient(rgba(10, 22, 40, 0.66), rgba(10, 22, 40, 0.66)),
    url("../images/10.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.card-embodied-bg h3,
.card-embodied-bg p {
  color: #eef5fb;
}

/* 产品页：四大核心功能模块美化 */
.feature-module-grid {
  display: grid;
  gap: 24px;
}
.feature-module-card {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: 28px;
  align-items: start;
  border-left: 3px solid rgba(0, 212, 255, 0.35);
}
.feature-module-head .card-icon {
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: rgba(0, 212, 255, 0.16);
  border: 1px solid rgba(0, 212, 255, 0.3);
  overflow: hidden;
}
.feature-icon-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.feature-module-head h3 {
  margin: 0;
  line-height: 1.4;
}
.feature-module-body p {
  margin: 0 0 12px;
  line-height: 1.75;
}
.feature-module-body p:last-child {
  margin-bottom: 0;
}
.feature-module-body span {
  display: inline-block;
  min-width: 74px;
  margin-right: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.82rem;
  color: #dff8ff;
  background: rgba(0, 212, 255, 0.18);
}
@media (max-width: 860px) {
  .feature-module-card {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* 产品页 · 六大差异化优势 */
.section--diff-advantages {
  background: linear-gradient(165deg, var(--color-deep-space) 0%, rgba(13, 33, 55, 0.92) 42%, var(--color-deep-space) 100%);
  position: relative;
}
.section--diff-advantages::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 212, 255, 0.09), transparent 55%);
  pointer-events: none;
}
.section--diff-advantages .container {
  position: relative;
  z-index: 1;
}
.diff-advantages-lead {
  max-width: 36rem;
}
.diff-advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(18px, 2.5vw, 24px);
}
.diff-advantage-card {
  position: relative;
  margin: 0;
  padding: 1.5rem 1.35rem 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 212, 255, 0.14);
  background:
    linear-gradient(155deg, rgba(0, 212, 255, 0.08) 0%, rgba(19, 47, 76, 0.55) 38%, rgba(10, 22, 40, 0.75) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 8px 28px rgba(0, 0, 0, 0.22);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  overflow: hidden;
}
.diff-advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--diff-accent, var(--color-vitality-cyan)), rgba(0, 212, 255, 0.15));
  opacity: 0.9;
}
.diff-advantage-card::after {
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  right: -36px;
  top: -36px;
  background: radial-gradient(circle, var(--diff-glow, rgba(0, 212, 255, 0.12)) 0%, transparent 68%);
  pointer-events: none;
}
.diff-advantage-card:nth-child(1) {
  --diff-accent: #38bdf8;
  --diff-glow: rgba(56, 189, 248, 0.18);
}
.diff-advantage-card:nth-child(2) {
  --diff-accent: #22d3ee;
  --diff-glow: rgba(34, 211, 238, 0.18);
}
.diff-advantage-card:nth-child(3) {
  --diff-accent: #2dd4bf;
  --diff-glow: rgba(45, 212, 191, 0.16);
}
.diff-advantage-card:nth-child(4) {
  --diff-accent: #a78bfa;
  --diff-glow: rgba(167, 139, 250, 0.18);
}
.diff-advantage-card:nth-child(5) {
  --diff-accent: #4ade80;
  --diff-glow: rgba(74, 222, 128, 0.14);
}
.diff-advantage-card:nth-child(6) {
  --diff-accent: #f472b6;
  --diff-glow: rgba(244, 114, 182, 0.14);
}
.diff-advantage-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.32);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.07),
    0 16px 40px rgba(0, 0, 0, 0.28),
    0 0 0 1px rgba(0, 212, 255, 0.1);
}
.diff-advantage-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.diff-advantage-card__index {
  font-family: var(--font-sans);
  font-size: clamp(1.65rem, 3.2vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: transparent;
  background: linear-gradient(125deg, var(--diff-accent, var(--color-vitality-cyan)) 0%, rgba(255, 255, 255, 0.88) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  text-shadow: 0 0 40px var(--diff-glow, rgba(0, 212, 255, 0.25));
}
.diff-advantage-card__icon {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--diff-accent, var(--color-vitality-cyan));
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.22);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.diff-advantage-card:nth-child(1) .diff-advantage-card__icon {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.32);
}
.diff-advantage-card:nth-child(2) .diff-advantage-card__icon {
  background: rgba(34, 211, 238, 0.12);
  border-color: rgba(34, 211, 238, 0.32);
}
.diff-advantage-card:nth-child(3) .diff-advantage-card__icon {
  background: rgba(45, 212, 191, 0.11);
  border-color: rgba(45, 212, 191, 0.3);
}
.diff-advantage-card:nth-child(4) .diff-advantage-card__icon {
  background: rgba(167, 139, 250, 0.12);
  border-color: rgba(167, 139, 250, 0.32);
}
.diff-advantage-card:nth-child(5) .diff-advantage-card__icon {
  background: rgba(74, 222, 128, 0.1);
  border-color: rgba(74, 222, 128, 0.28);
}
.diff-advantage-card:nth-child(6) .diff-advantage-card__icon {
  background: rgba(244, 114, 182, 0.1);
  border-color: rgba(244, 114, 182, 0.28);
}
.diff-advantage-card__icon svg {
  width: 1.15rem;
  height: 1.15rem;
}
.diff-advantage-card__text {
  margin: 0;
  position: relative;
  z-index: 1;
  font-size: 0.94rem;
  line-height: 1.72;
  color: #dbe7f0;
  letter-spacing: 0.01em;
}

/* 首页四大核心价值卡片加大尺寸 */
.value-grid .card {
  position: relative;
  padding: 40px 34px 34px;
  min-height: 280px;
  border-radius: 14px;
  border: 1px solid rgba(0, 212, 255, 0.2);
  background:
    linear-gradient(160deg, rgba(0, 212, 255, 0.1), rgba(19, 47, 76, 0.72) 45%, rgba(10, 22, 40, 0.9)),
    rgba(19, 47, 76, 0.65);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.value-grid .card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 14px 14px 0 0;
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.9), rgba(0, 168, 204, 0.35));
}
.value-grid .card .card-icon {
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  color: #e8f9ff;
  background: rgba(0, 212, 255, 0.18);
  border: 1px solid rgba(0, 212, 255, 0.28);
}
.value-grid .card h3 {
  font-size: 1.18rem;
  line-height: 1.5;
  margin-bottom: 14px;
  color: #f0f8ff;
}
.value-grid .card p {
  font-size: 0.98rem;
  line-height: 1.8;
  color: #c8d6e5;
}
.value-grid .card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.45);
  box-shadow:
    0 12px 30px rgba(0, 0, 0, 0.28),
    0 0 0 1px rgba(0, 212, 255, 0.18) inset;
}

/* 首页：标杆案例卡片美化 */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.case-card {
  padding: 22px;
  border-radius: 14px;
  background: linear-gradient(165deg, rgba(19, 47, 76, 0.76), rgba(10, 22, 40, 0.9));
  border: 1px solid rgba(0, 212, 255, 0.2);
  display: flex;
  flex-direction: column;
  min-height: 460px;
}
.case-card:hover {
  border-color: rgba(0, 212, 255, 0.42);
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
}
.case-thumb {
  height: 360px;
  margin-bottom: 16px;
  border-radius: 10px;
  background:
    linear-gradient(rgba(0, 212, 255, 0.12), rgba(0, 212, 255, 0.08)),
    rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #c3d6e6;
  font-size: 0.92rem;
  overflow: hidden;
}
.case-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: inherit;
}
.case-card h3 {
  font-size: 1.14rem;
  margin: 4px 0 0;
  color: #edf6ff;
  text-align: center;
  letter-spacing: 0.02em;
}
.case-card p {
  color: #c4d2e1;
  line-height: 1.7;
}
.case-btn {
  margin-top: auto;
  width: fit-content;
  padding: 8px 16px;
  font-size: 0.85rem;
}
@media (max-width: 900px) {
  .case-grid {
    grid-template-columns: 1fr;
  }
}

/* 案例列表页：版心随视口拉满，每行三列等分整行宽度 */
.cases-list-section > .container {
  max-width: none;
  width: 100%;
}

.cases-list-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
  width: 100%;
}
.cases-list-section .cases-list-card {
  min-height: 0;
}
.cases-list-section .case-thumb {
  height: 220px;
}
.cases-list-section .case-thumb img {
  object-fit: cover;
}
.case-thumb--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}
.cases-list-tag {
  font-size: 0.85rem;
  color: var(--color-vitality-cyan);
  margin: 0 0 8px;
  text-align: center;
}
.cases-list-card h3 {
  text-align: center;
}
@media (max-width: 900px) {
  .cases-list-grid {
    grid-template-columns: 1fr;
  }
}
@media (min-width: 901px) and (max-width: 1100px) {
  .cases-list-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ===== 页脚 ===== */
.footer { padding: 60px 0 30px; border-top: 1px solid var(--color-border); background: var(--color-space-blue); }
.footer-main { display: grid; grid-template-columns: 2fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 12px; }
.footer-slogan { color: var(--color-text-muted); font-size: 0.9rem; margin-bottom: 20px; }
.footer-contact p { color: var(--color-tech-silver); font-size: 0.9rem; margin-bottom: 8px; }
.footer-links h4 { font-size: 0.9rem; margin-bottom: 16px; color: var(--color-tech-silver); }
.footer-links a { display: block; color: var(--color-text-muted); text-decoration: none; font-size: 0.9rem; margin-bottom: 8px; transition: color var(--transition); }
.footer-links a:hover { color: var(--color-vitality-cyan); }
.footer-bottom { padding-top: 24px; border-top: 1px solid var(--color-border); text-align: center; }
.footer-bottom p { color: var(--color-text-muted); font-size: 0.85rem; margin-bottom: 8px; }
.footer-bottom a { color: inherit; text-decoration: none; transition: color var(--transition); }
.footer-bottom a:hover { color: var(--color-vitality-cyan); }

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  .footer-main { grid-template-columns: 1fr; text-align: center; }
  .card[style*="grid-template-columns: 1fr 2fr"] {
    grid-template-columns: 1fr !important;
  }
}

/* 表单聚焦样式 */
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-vitality-cyan) !important;
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.2);
}