/* ===================================
   湖北携能科技有限公司 - 企业官网样式
   =================================== */

/* --- 全局变量 --- */
:root {
  --primary: #0a2a5e;
  --primary-light: #1a4a8a;
  --accent: #1e88e5;
  --accent-light: #42a5f5;
  --text-dark: #1a1a2e;
  --text-body: #444;
  --text-light: #888;
  --bg-light: #f8f9fc;
  --bg-white: #ffffff;
  --border: #e5e9f0;
  --shadow: 0 4px 24px rgba(10,42,94,0.10);
  --shadow-hover: 0 8px 40px rgba(10,42,94,0.18);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.3;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }

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

/* ===================================
   导航栏
   =================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229,233,240,0.6);
  transition: box-shadow var(--transition);
}
.navbar.scrolled {
  box-shadow: var(--shadow);
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.navbar-logo .logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -1px;
  flex-shrink: 0;
}
.navbar-logo .logo-text {
  display: flex;
  flex-direction: column;
}
.navbar-logo .logo-text .company-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.navbar-logo .logo-text .company-sub {
  font-size: 0.68rem;
  color: var(--text-light);
  letter-spacing: 1px;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar-nav a {
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-body);
  transition: all var(--transition);
  position: relative;
}
.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--accent);
  background: rgba(30,136,229,0.08);
}
.navbar-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%) !important;
  color: white !important;
  border-radius: 8px;
  padding: 8px 20px !important;
}
.navbar-cta:hover {
  box-shadow: 0 4px 16px rgba(30,136,229,0.35) !important;
  transform: translateY(-1px);
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent-light) 100%) !important;
  color: white !important;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===================================
   页面通用
   =================================== */
.page { display: none; }
.page.active { display: block; }

/* 页面顶部间距 */
.page-top { padding-top: 70px; }

/* 区块标题 */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  background: rgba(30,136,229,0.1);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: var(--text-dark);
  margin-bottom: 16px;
}
.section-title span { color: var(--accent); }
.section-desc {
  font-size: 1.05rem;
  color: var(--text-light);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  box-shadow: 0 4px 16px rgba(30,136,229,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(30,136,229,0.45);
}
.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.7);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: white;
}
.btn-outline-dark {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-outline-dark:hover {
  background: var(--accent);
  color: white;
}

/* ===================================
   首页 Hero
   =================================== */
.hero {
  min-height: 100vh;
  background: linear-gradient(150deg, #051a3d 0%, #0a2a5e 40%, #0d3578 65%, #1565c0 100%);
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 65vw;
  height: 65vw;
  background: radial-gradient(circle, rgba(30,136,229,0.18) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 45vw;
  height: 45vw;
  background: radial-gradient(circle, rgba(66,165,245,0.12) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: 100px 0 80px;
}
.hero-content {}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(30,136,229,0.2);
  border: 1px solid rgba(30,136,229,0.4);
  color: #90caf9;
  font-size: 0.82rem;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero-badge .dot {
  width: 6px; height: 6px;
  background: #42a5f5;
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}
.hero-title {
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  color: white;
  line-height: 1.2;
  margin-bottom: 14px;
}
.hero-title span {
  background: linear-gradient(90deg, #42a5f5, #90caf9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255,255,255,0.65);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 56px;
}
.hero-stats {
  display: flex;
  gap: 40px;
}
.hero-stat .stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: white;
  line-height: 1;
}
.hero-stat .stat-num span {
  font-size: 1.1rem;
  color: #90caf9;
}
.hero-stat .stat-label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-card-main {
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  position: relative;
}
.hero-card-main .machine-icon {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--accent) 0%, #0d47a1 100%);
  border-radius: 22px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  box-shadow: 0 12px 40px rgba(30,136,229,0.5);
  position: relative;
}
.hero-card-main .machine-icon::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 26px;
  border: 2px solid rgba(30,136,229,0.3);
  animation: spin 8s linear infinite;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.hero-card-main h3 {
  color: white;
  text-align: center;
  font-size: 1.3rem;
  margin-bottom: 8px;
}
.hero-card-main p {
  color: rgba(255,255,255,0.55);
  text-align: center;
  font-size: 0.88rem;
  margin-bottom: 28px;
}
.hero-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 12px 16px;
}
.hero-feature-item .fi-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, rgba(30,136,229,0.4), rgba(66,165,245,0.3));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.hero-feature-item .fi-text {
  color: rgba(255,255,255,0.85);
  font-size: 0.88rem;
  font-weight: 500;
}
.hero-float-card {
  position: absolute;
  background: white;
  border-radius: 12px;
  padding: 12px 16px;
  box-shadow: var(--shadow-hover);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dark);
  white-space: nowrap;
  animation: float 4s ease-in-out infinite;
}
.hero-float-card.fc1 { top: 10%; right: -14%; animation-delay: 0s; }
.hero-float-card.fc2 { bottom: 12%; left: -12%; animation-delay: 2s; }
.hero-float-card .fc-icon { font-size: 20px; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.4);
  font-size: 0.75rem;
  z-index: 1;
  cursor: pointer;
}
.scroll-hint .scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid rgba(255,255,255,0.3);
  border-bottom: 2px solid rgba(255,255,255,0.3);
  transform: rotate(45deg);
  animation: scrollDown 1.5s ease-in-out infinite;
  margin-top: -4px;
}
@keyframes scrollDown {
  0%, 100% { opacity: 0.3; transform: rotate(45deg) translateY(0); }
  50% { opacity: 0.8; transform: rotate(45deg) translateY(4px); }
}

/* ===================================
   首页 - 核心优势
   =================================== */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-light); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform var(--transition);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: transparent;
}
.feature-icon {
  width: 70px; height: 70px;
  background: linear-gradient(135deg, rgba(10,42,94,0.08), rgba(30,136,229,0.12));
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin: 0 auto 20px;
  transition: all var(--transition);
}
.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  transform: scale(1.08);
}
.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  color: var(--text-dark);
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===================================
   首页 - 产品展示
   =================================== */
.product-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
}
.product-visual {
  position: relative;
}
.product-main-card {
  background: linear-gradient(135deg, #0a2a5e 0%, #1565c0 100%);
  border-radius: var(--radius-lg);
  padding: 50px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.product-main-card::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(30,136,229,0.35), transparent);
  border-radius: 50%;
}
.product-main-card .pm-icon {
  font-size: 90px;
  position: relative;
  z-index: 1;
  line-height: 1;
  margin-bottom: 20px;
  display: block;
  filter: drop-shadow(0 8px 24px rgba(0,0,0,0.3));
}
.product-main-card h3 {
  color: white;
  font-size: 1.4rem;
  position: relative;
  z-index: 1;
  margin-bottom: 8px;
}
.product-main-card p {
  color: rgba(255,255,255,0.6);
  font-size: 0.88rem;
  position: relative;
  z-index: 1;
}
.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.product-tag {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8);
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 20px;
}
.product-info h2 {
  margin-bottom: 20px;
}
.product-info .product-desc {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.9;
  margin-bottom: 32px;
}
.product-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 36px;
}
.spec-item {
  background: var(--bg-light);
  border-radius: 10px;
  padding: 16px 20px;
  border: 1px solid var(--border);
}
.spec-item .spec-label {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-bottom: 4px;
}
.spec-item .spec-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dark);
}

/* ===================================
   首页 - 应用场景
   =================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.scenario-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.scenario-thumb {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 56px;
  position: relative;
  overflow: hidden;
}
.scenario-card:nth-child(1) .scenario-thumb { background: linear-gradient(135deg, #e3f2fd, #bbdefb); }
.scenario-card:nth-child(2) .scenario-thumb { background: linear-gradient(135deg, #e8f5e9, #c8e6c9); }
.scenario-card:nth-child(3) .scenario-thumb { background: linear-gradient(135deg, #fff3e0, #ffe0b2); }
.scenario-card:nth-child(4) .scenario-thumb { background: linear-gradient(135deg, #f3e5f5, #e1bee7); }
.scenario-body {
  padding: 20px;
}
.scenario-body h3 {
  font-size: 1rem;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.scenario-body p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===================================
   首页 - 操作流程
   =================================== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 44px;
  left: 8.33%;
  right: 8.33%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 0;
}
.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 8px;
}
.step-num {
  width: 88px;
  height: 88px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 6px 20px rgba(30,136,229,0.3);
  position: relative;
}
.step-num .num {
  font-size: 1.1rem;
  font-weight: 800;
  color: rgba(255,255,255,0.6);
  line-height: 1;
}
.step-num .step-icon {
  font-size: 1.5rem;
  line-height: 1;
}
.process-step h4 {
  font-size: 0.95rem;
  color: var(--text-dark);
  margin-bottom: 6px;
}
.process-step p {
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===================================
   首页 - CTA
   =================================== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, #1565c0 100%);
  padding: 90px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -40%;
  left: -5%;
  width: 50%;
  height: 150%;
  background: radial-gradient(circle, rgba(255,255,255,0.06), transparent);
  border-radius: 50%;
}
.cta-section h2 {
  color: white;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  margin-bottom: 16px;
  position: relative;
}
.cta-section p {
  color: rgba(255,255,255,0.65);
  font-size: 1.05rem;
  margin-bottom: 40px;
  position: relative;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  position: relative;
}
.btn-white {
  background: white;
  color: var(--primary);
  font-weight: 700;
}
.btn-white:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,0.2);
  transform: translateY(-2px);
}

/* ===================================
   关于我们页面
   =================================== */
.about-hero {
  background: linear-gradient(150deg, #051a3d 0%, #0a2a5e 50%, #1565c0 100%);
  padding: 140px 0 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.about-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle, rgba(30,136,229,0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.about-hero h1 { color: white; margin-bottom: 16px; position: relative; }
.about-hero p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 600px; margin: 0 auto; position: relative; }

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
}
.about-visual-block {
  position: relative;
}
.about-main-visual {
  background: linear-gradient(135deg, #0a2a5e, #1565c0);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  text-align: center;
}
.about-main-visual .av-icon { font-size: 80px; margin-bottom: 20px; display: block; }
.about-main-visual h3 { color: white; font-size: 1.5rem; margin-bottom: 12px; }
.about-main-visual p { color: rgba(255,255,255,0.65); font-size: 0.9rem; line-height: 1.8; }
.about-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}
.about-metric {
  background: rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
}
.about-metric .am-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: #90caf9;
  line-height: 1.1;
}
.about-metric .am-label {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}
.about-text-block h2 { margin-bottom: 20px; }
.about-text-block p {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.9;
  margin-bottom: 20px;
}
.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 32px;
}
.about-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  background: var(--bg-light);
  border-radius: 10px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.about-highlight-item:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(30,136,229,0.1);
}
.ahi-icon {
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.ahi-text h4 { font-size: 0.95rem; margin-bottom: 4px; color: var(--text-dark); }
.ahi-text p { font-size: 0.85rem; color: var(--text-light); }

/* 企业使命 */
.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.mission-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 40px 30px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.mission-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(30,136,229,0.3);
}
.mission-icon {
  width: 72px; height: 72px;
  background: linear-gradient(135deg, rgba(10,42,94,0.08), rgba(30,136,229,0.15));
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto 20px;
}
.mission-card:nth-child(1) .mission-icon { background: linear-gradient(135deg, #e3f2fd, #90caf9); }
.mission-card:nth-child(2) .mission-icon { background: linear-gradient(135deg, #e8f5e9, #a5d6a7); }
.mission-card:nth-child(3) .mission-icon { background: linear-gradient(135deg, #fff3e0, #ffcc80); }
.mission-card h3 { font-size: 1.1rem; margin-bottom: 12px; }
.mission-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.8; }

/* ===================================
   产品服务页面
   =================================== */
.products-hero {
  background: linear-gradient(150deg, #051a3d 0%, #0a2a5e 50%, #1565c0 100%);
  padding: 140px 0 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.products-hero h1 { color: white; margin-bottom: 16px; }
.products-hero p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

.tech-advantages {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.tech-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 36px 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.tech-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.tech-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform var(--transition);
}
.tech-card:hover::after { transform: scaleX(1); }
.tech-num {
  font-size: 3rem;
  font-weight: 900;
  color: rgba(30,136,229,0.12);
  line-height: 1;
  margin-bottom: -10px;
}
.tech-icon-box {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.tech-card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.tech-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.8; }

/* 产品参数表 */
.params-table-wrap {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.params-table {
  width: 100%;
  border-collapse: collapse;
}
.params-table th {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  padding: 18px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
}
.params-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}
.params-table tr:last-child td { border-bottom: none; }
.params-table tr:nth-child(even) td { background: var(--bg-light); }
.params-table td:first-child {
  font-weight: 600;
  color: var(--text-dark);
  width: 30%;
}
.params-table td:last-child { color: var(--text-body); }

/* 操作流程 - 大版 */
.process-big {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.process-big-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
}
.process-big-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.pb-step-num {
  position: absolute;
  top: 24px; right: 24px;
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.82rem;
  font-weight: 700;
}
.pb-icon {
  font-size: 40px;
  margin-bottom: 16px;
}
.process-big-card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.process-big-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.8; }

/* ===================================
   联系我们页面
   =================================== */
.contact-hero {
  background: linear-gradient(150deg, #051a3d 0%, #0a2a5e 50%, #1565c0 100%);
  padding: 140px 0 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.contact-hero h1 { color: white; margin-bottom: 16px; }
.contact-hero p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 50px;
  align-items: start;
}
.contact-info-col {}
.contact-info-col h2 { margin-bottom: 16px; }
.contact-info-col > p {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 32px;
}
.contact-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
}
.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--bg-light);
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.contact-item:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(30,136,229,0.1);
}
.ci-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.ci-content h4 { font-size: 0.88rem; color: var(--text-light); margin-bottom: 4px; }
.ci-content p { font-size: 1rem; font-weight: 600; color: var(--text-dark); }
.ci-content a { color: var(--accent); }

.contact-form-col {}
.contact-form {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.contact-form h3 { font-size: 1.3rem; margin-bottom: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--text-dark);
  background: var(--bg-light);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(30,136,229,0.12);
  background: white;
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* 地图占位 */
.map-placeholder {
  background: linear-gradient(135deg, var(--bg-light), #dde8f0);
  border-radius: var(--radius);
  height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  gap: 12px;
  color: var(--text-light);
  font-size: 0.9rem;
}
.map-placeholder .map-icon { font-size: 48px; }

/* ===================================
   页脚
   =================================== */
.footer {
  background: #0a1628;
  color: rgba(255,255,255,0.65);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand {}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 800;
}
.footer-logo .logo-text {
  color: white;
  font-size: 0.95rem;
  font-weight: 700;
}
.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-col h4 {
  color: white;
  font-size: 0.95rem;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
  cursor: pointer;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.footer-col ul li a:hover { color: var(--accent-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.3);
}

/* ===================================
   产品图片展示 Gallery
   =================================== */
/* 首页产品区 - 图片包装 */
.product-img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 56px rgba(10,42,94,0.18);
  background: #f0f4f8;
}
.product-main-img {
  width: 100%;
  height: 340px;
  object-fit: contain;
  object-position: center;
  background: #f5f7fa;
  transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
  padding: 16px;
}
.product-img-wrap:hover .product-main-img {
  transform: scale(1.04);
}
.product-img-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

/* 产品 Gallery 大图区 */
.product-gallery {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #f0f4f8;
  box-shadow: var(--shadow);
  cursor: zoom-in;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: #f5f7fa;
  transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
  padding: 20px;
  min-height: 300px;
}
.gallery-item:hover img {
  transform: scale(1.05);
}
.gallery-item-main img { min-height: 380px; }
.gallery-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(10,42,94,0.85), transparent);
  color: white;
  padding: 20px 20px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(100%);
  transition: transform var(--transition);
}
.gallery-item:hover .gallery-caption {
  transform: translateY(0);
}
.gc-icon { font-size: 1rem; }

/* 产品Gallery：上1下2排布 */
.product-gallery-2row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 24px;
  margin-bottom: 48px;
}
.product-gallery.product-gallery-2row > .gallery-item:nth-child(1) {
  grid-column: 1 / -1 !important;
  width: 100% !important;
}

/* 产品图片下方特性格子 */
.product-gallery-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.pgf-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.pgf-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-light);
}
.pgf-icon {
  font-size: 28px;
  margin-bottom: 12px;
}
.pgf-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.pgf-item p {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===================================
   实际案例页面
   =================================== */

/* 案例页头部 */
.cases-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, #1565c0 100%);
  color: white;
  padding: 120px 0 72px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cases-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}
.cases-hero h1 { color: white; margin-bottom: 16px; }
.cases-hero p { color: rgba(255,255,255,0.82); font-size: 1.12rem; max-width: 560px; margin: 0 auto; }

/* 案例统计数据 */
.cases-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  padding: 40px 32px;
  margin: -20px 0 0;
  border: 1px solid var(--border);
}
.cases-stats.cases-stats-3 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.cases-stat-item {
  text-align: center;
  padding: 16px 8px;
  border-right: 1px solid var(--border);
}
.cases-stat-item:last-child { border-right: none; }
.cases-stat-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  margin-bottom: 8px;
}
.cases-stat-num span {
  font-size: 1.4rem;
  color: var(--accent);
}
.cases-stat-label {
  color: var(--text-light);
  font-size: 0.88rem;
  font-weight: 500;
}

/* 案例实拍图布局 */
.case-photo-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
  align-items: start;
}
.case-photo-main {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  aspect-ratio: 4/3;
}
.case-photo-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.case-photo-main:hover img { transform: scale(1.04); }
.case-photo-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(0deg, rgba(10,42,94,0.90) 0%, transparent 100%);
  padding: 32px 24px 24px;
  color: white;
}
.case-photo-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.case-photo-info h4 { color: white; font-size: 1.1rem; margin-bottom: 6px; }
.case-photo-info p { color: rgba(255,255,255,0.82); font-size: 0.88rem; line-height: 1.5; }

/* 案例侧边信息 */
.case-photo-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.case-photo-detail {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  flex: 1;
}
.cpd-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}
.case-photo-detail h4 {
  color: var(--primary);
  font-size: 1.05rem;
  margin-bottom: 10px;
}
.case-photo-detail p {
  color: var(--text-body);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 16px;
}
.case-detail-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.case-detail-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-body);
}
.cdl-icon {
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* 案例小指标卡 */
.case-photo-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.cpm-item {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius);
  padding: 16px 10px;
  text-align: center;
  color: white;
}
.cpm-num {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 4px;
}
.cpm-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.8);
}

/* 视频区 */
.case-video-wrap {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 36px;
  align-items: start;
}
.case-video-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  background: #000;
}
.case-video {
  width: 100%;
  display: block;
  border-radius: var(--radius-lg);
  max-height: 480px;
  object-fit: contain;
  background: #000;
}
.video-play-hint {
  display: none; /* 有原生controls，不显示 */
}
.case-video-steps {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.case-video-steps h3 {
  color: var(--primary);
  font-size: 1.15rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
.cvs-list { display: flex; flex-direction: column; gap: 16px; }
.cvs-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px;
  border-radius: var(--radius);
  background: var(--bg-light);
  transition: background var(--transition);
}
.cvs-item:hover { background: #e8f0fe; }
.cvs-num {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
}
.cvs-text h4 { font-size: 0.95rem; color: var(--primary); margin-bottom: 4px; }
.cvs-text p { font-size: 0.82rem; color: var(--text-light); line-height: 1.5; }

/* 场景案例卡片 */
.scenario-cases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.sc-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.sc-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.sc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.sc-icon { font-size: 2rem; }
.sc-tag {
  background: #e8f5e9;
  color: #2e7d32;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
}
.sc-tag-prospect {
  background: #fff3e0;
  color: #e65100;
}
.sc-card h3 {
  font-size: 1rem;
  color: var(--primary);
  margin-bottom: 10px;
}
.sc-card p {
  font-size: 0.87rem;
  color: var(--text-body);
  line-height: 1.65;
  margin-bottom: 14px;
}
.sc-data {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.sc-data span {
  background: var(--bg-light);
  color: var(--text-body);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 500;
}

/* ===================================
   响应式
   =================================== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .process-steps::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-gallery { grid-template-columns: 1fr; }
  .product-gallery-2row { grid-template-columns: 1fr; }
  .product-gallery-2row > .gallery-item:nth-child(1) { grid-column: 1 / -1 !important; width: 100% !important; }
  .product-gallery-features { grid-template-columns: repeat(2, 1fr); }
  .scenario-cases-grid { grid-template-columns: repeat(2, 1fr); }
  .case-video-wrap { grid-template-columns: 1fr; }
  .case-photo-layout { grid-template-columns: 1fr; }
  .cases-stats { grid-template-columns: repeat(2, 1fr); }
  .cases-stat-item:nth-child(2) { border-right: none; }
}

@media (max-width: 768px) {
  .navbar-nav { display: none; }
  .navbar-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0; right: 0;
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 16px;
    box-shadow: var(--shadow);
  }
  .nav-toggle { display: flex; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; padding: 90px 0 60px; }
  .hero-visual { order: -1; }
  .hero-float-card { display: none; }
  .hero-stats { gap: 24px; }
  .product-showcase { grid-template-columns: 1fr; gap: 40px; }
  .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .mission-grid { grid-template-columns: 1fr; }
  .tech-advantages { grid-template-columns: 1fr; }
  .process-big { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .product-specs { grid-template-columns: 1fr; }
  .product-gallery { grid-template-columns: 1fr; }
  .product-gallery-2row { grid-template-columns: 1fr !important; }
  .product-gallery-2row > .gallery-item:nth-child(1) { grid-column: 1 / -1 !important; width: 100% !important; }
  .product-gallery-features { grid-template-columns: repeat(2, 1fr); }
  .gallery-caption { transform: translateY(0); }
  .scenario-cases-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-stats { grid-template-columns: repeat(2, 1fr); }
  .cases-stat-item:nth-child(2) { border-right: none; }
  .cases-stat-item:nth-child(4) { border-right: none; }
}

@media (max-width: 480px) {
  .section { padding: 64px 0; }
  .features-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .product-gallery-features { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .scenario-cases-grid { grid-template-columns: 1fr; }
  .cases-stats { grid-template-columns: repeat(2, 1fr); }
  .case-photo-metrics { grid-template-columns: repeat(3, 1fr); }
}

/* --- 动画 --- */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 延迟 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }