/* ==========================================================================
   上海能宏实业有限公司 · 官网样式
   深色科技感 + 蓝色霓虹主题
   ========================================================================== */

/* ----------  全局 Reset & 变量  ---------- */
:root {
  --bg-primary: #050b18;
  --bg-secondary: #0a1628;
  --bg-card: #0f1f38;
  --bg-elevated: #142845;
  --border: rgba(0, 212, 255, 0.15);
  --border-strong: rgba(0, 212, 255, 0.35);
  --accent: #00d4ff;
  --accent-2: #4d7cff;
  --accent-3: #7b2cff;
  --text-primary: #ffffff;
  --text-secondary: #b8c5d6;
  --text-muted: #7a8aa0;
  --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.25);
  --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.5);
  --radius: 14px;
  --radius-sm: 8px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7b2cff 100%);
  --gradient-hero: linear-gradient(135deg, rgba(5, 11, 24, 0.85) 0%, rgba(10, 22, 40, 0.55) 50%, rgba(0, 212, 255, 0.15) 100%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ----------  动效背景（细密网格 + 光斑）  ---------- */
.bg-decoration {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(0, 212, 255, 0.12) 0%, transparent 45%),
    radial-gradient(ellipse at 80% 90%, rgba(123, 44, 255, 0.10) 0%, transparent 50%),
    linear-gradient(180deg, #050b18 0%, #071224 100%);
}
.bg-decoration::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 80%);
}

/* ----------  Header / Navbar  ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  background: rgba(5, 11, 24, 0.55);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.navbar.scrolled {
  padding: 12px 0;
  background: rgba(5, 11, 24, 0.92);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.5px;
}
.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--gradient-primary);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 1.15rem;
  box-shadow: var(--shadow-glow);
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.logo-text small {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 1.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-menu a {
  padding: 8px 18px;
  font-size: 0.94rem;
  color: var(--text-secondary);
  border-radius: 999px;
  position: relative;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-primary);
  background: rgba(0, 212, 255, 0.08);
}
.nav-menu a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--gradient-primary);
  color: #fff !important;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 6px 24px rgba(0, 212, 255, 0.35);
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.5);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1.4rem;
  background: rgba(0, 212, 255, 0.08);
}

/* ----------  Hero  ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: heroZoom 20s ease-in-out infinite alternate;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}
@keyframes heroZoom {
  0%   { transform: scale(1.0);  }
  100% { transform: scale(1.12); }
}

.hero-content { max-width: 780px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.10);
  border: 1px solid var(--border-strong);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}
.hero-badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1);   }
  50%      { opacity: 0.4; transform: scale(1.4); }
}

.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-desc {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 620px;
  margin-bottom: 36px;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.hero-meta-item .num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.hero-meta-item .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ----------  Buttons  ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(0, 212, 255, 0.55);
}
.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
  border-color: var(--border-strong);
  backdrop-filter: blur(10px);
}
.btn-outline:hover {
  background: rgba(0, 212, 255, 0.10);
  border-color: var(--accent);
}

/* ----------  Sections  ---------- */
section { position: relative; padding: 100px 0; }
.section-head { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.section-title .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-desc {
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.8;
}

/* ----------  Features Grid  ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  padding: 30px 26px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.10);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  margin-bottom: 18px;
}
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ----------  Services Cards（首页业务概览）  ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.service-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 320px;
  cursor: pointer;
  transition: var(--transition);
  isolation: isolate;
}
.service-card img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -2;
}
.service-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(5, 11, 24, 0.95) 0%, rgba(5, 11, 24, 0.4) 55%, transparent 100%);
  z-index: -1;
}
.service-card:hover img { transform: scale(1.08); }
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}
.service-inner {
  position: absolute;
  bottom: 0;
  padding: 28px;
  width: 100%;
}
.service-inner h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.service-inner p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 14px;
}
.service-inner .arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 600;
}
.service-inner .arrow i { transition: transform 0.3s; }
.service-card:hover .arrow i { transform: translateX(6px); }

/* ----------  Cases Grid  ---------- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.case-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.case-thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  position: relative;
}
.case-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.case-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(5, 11, 24, 0.4) 0%, transparent 60%);
}
.case-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(5, 11, 24, 0.7);
  border: 1px solid var(--border-strong);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  backdrop-filter: blur(10px);
  z-index: 2;
}
.case-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card);
}
.case-card:hover .case-thumb img { transform: scale(1.08); }
.case-info { padding: 22px; }
.case-info h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  transition: color 0.3s;
}
.case-card:hover .case-info h3 { color: var(--accent); }
.case-info p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

/* ----------  About Story  ---------- */
.about-layout {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 5;
}
.about-visual img { width: 100%; height: 100%; object-fit: cover; }
.about-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  z-index: 2;
  pointer-events: none;
}
.about-visual .badge-num {
  position: absolute;
  right: -30px; bottom: 40px;
  padding: 24px 32px;
  background: var(--gradient-primary);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 212, 255, 0.45);
  z-index: 3;
}
.about-visual .badge-num .num {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  color: #fff;
}
.about-visual .badge-num .label {
  color: #fff;
  font-size: 0.85rem;
  margin-top: 4px;
  opacity: 0.9;
}

.about-text .section-tag { margin-bottom: 12px; }
.about-text h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 22px;
}
.about-text h2 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.85;
}
.about-list {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}
.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.about-list li i {
  color: var(--accent);
  margin-top: 4px;
}

/* ----------  Timeline  ---------- */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 30px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), transparent);
}
.timeline-item {
  position: relative;
  padding: 0 0 40px 40px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
.timeline-year {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 6px;
}
.timeline-item h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  font-weight: 700;
}
.timeline-item p {
  color: var(--text-secondary);
  line-height: 1.75;
  font-size: 0.94rem;
}

/* ----------  Services 详情页  ---------- */
.services-detail {
  display: flex;
  flex-direction: column;
  gap: 80px;
}
.service-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.service-row.reverse .service-visual { order: 2; }
.service-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.service-visual img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s;
}
.service-visual:hover img { transform: scale(1.05); }
.service-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, transparent 60%);
  pointer-events: none;
}
.service-body .service-num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Inter', monospace;
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 3px;
}
.service-body h3 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  margin-bottom: 16px;
}
.service-body > p {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 20px;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}
.tag-list span {
  padding: 6px 14px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ----------  Contact  ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.contact-info {
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.contact-info h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 22px;
}
.contact-item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border-bottom: none; }
.contact-item-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgba(0, 212, 255, 0.10);
  color: var(--accent);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}
.contact-item-content .label {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-bottom: 4px;
}
.contact-item-content .value {
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
}
.contact-item-content .value.phone {
  font-size: 1.4rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: 1px;
}

.contact-form {
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.contact-form h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 22px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0, 212, 255, 0.04);
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-hint {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 12px;
  text-align: center;
}

/* ----------  CTA Section  ---------- */
.cta-section {
  position: relative;
  padding: 90px 24px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.12) 0%, rgba(123, 44, 255, 0.10) 100%);
  border: 1px solid var(--border-strong);
  overflow: hidden;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at center, rgba(0, 212, 255, 0.15) 0%, transparent 40%);
  animation: rotateBg 20s linear infinite;
}
@keyframes rotateBg {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.cta-section > * { position: relative; z-index: 1; }
.cta-section h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-section p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 30px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ----------  Sub-page Hero (about/services/cases/contact)  ---------- */
.sub-hero {
  position: relative;
  padding: 180px 0 90px;
  text-align: center;
  overflow: hidden;
}
.sub-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.sub-hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.35;
}
.sub-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 11, 24, 0.6) 0%, rgba(5, 11, 24, 0.95) 100%);
}
.sub-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.sub-hero h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sub-hero p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.75;
}
.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 0.65rem; }

/* ----------  Footer  ---------- */
.footer {
  background: linear-gradient(180deg, transparent 0%, rgba(5, 11, 24, 0.7) 30%, rgba(5, 11, 24, 0.95) 100%);
  padding: 70px 0 30px;
  margin-top: 60px;
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text-primary);
}
.footer-col p, .footer-col a {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.85;
  display: block;
  transition: color 0.25s;
}
.footer-col a:hover { color: var(--accent); }
.footer-col .brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.footer-col .brand-desc {
  margin-bottom: 20px;
  max-width: 320px;
  line-height: 1.75;
}
.footer-tel {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid var(--border-strong);
  color: var(--accent) !important;
  font-weight: 600;
  font-size: 1rem !important;
}
.footer-tel:hover { background: rgba(0, 212, 255, 0.15); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ----------  悬浮咨询按钮  ---------- */
.float-call {
  position: fixed;
  right: 24px;
  bottom: 32px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}
.float-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.5);
  transition: var(--transition);
  animation: floatPulse 2.5s ease-in-out infinite;
}
.float-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 50px rgba(0, 212, 255, 0.7);
}
@keyframes floatPulse {
  0%, 100% { box-shadow: 0 12px 40px rgba(0, 212, 255, 0.5); }
  50%      { box-shadow: 0 12px 40px rgba(0, 212, 255, 0.85), 0 0 0 12px rgba(0, 212, 255, 0.0); }
}
.back-top {
  width: 46px; height: 46px;
  border-radius: 50%;
  background: rgba(15, 31, 56, 0.85);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  display: none;
  place-items: center;
  backdrop-filter: blur(10px);
  cursor: pointer;
  transition: var(--transition);
}
.back-top.show { display: grid; }
.back-top:hover {
  background: var(--accent);
  color: #fff;
}

/* ----------  滚动淡入动效  ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ----------  Responsive  ---------- */
@media (max-width: 992px) {
  .about-layout,
  .service-row,
  .service-row.reverse,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .service-row.reverse .service-visual { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  section { padding: 70px 0; }
  .hero { min-height: 90vh; padding: 110px 0 60px; }
  .nav-menu {
    position: fixed;
    top: 68px;
    right: 16px;
    left: 16px;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    background: rgba(10, 22, 40, 0.98);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(20px);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    max-height: calc(100vh - 100px);
    overflow: auto;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-menu a { padding: 14px 18px; }
  .nav-menu .nav-cta { text-align: center; justify-content: center; }
  .nav-toggle { display: grid; place-items: center; }
  .hero-meta { gap: 20px; }
  .hero-meta-item .num { font-size: 1.4rem; }
  .about-visual .badge-num { right: 20px; padding: 18px 22px; }
  .about-visual .badge-num .num { font-size: 1.8rem; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .float-btn span { display: none; }
  .float-btn { padding: 14px; width: 52px; height: 52px; justify-content: center; }
  .sub-hero { padding: 140px 0 70px; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1; justify-content: center; }
}