/* ============================================
   深圳市巡洋机器搬运有限公司 - 全局样式 (Premium)
   XUNYANG MACHINERY TRANSPORT & INSTALLATION
   ============================================ */

/* ===== CSS 变量 ===== */
:root {
  --color-primary: #0A1A2E;
  --color-primary-light: #132D4A;
  --color-accent: #C41E3A;
  --color-accent-light: #E83A55;
  --color-accent-dark: #8B1226;
  --color-gold: #C8963E;
  --color-gold-light: #D4A854;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F7F8FA;
  --color-bg-dark: #060F1A;
  --color-text: #1a1a1a;
  --color-text-light: #5A5A5A;
  --color-text-muted: #8A8A8A;
  --color-border: #E8E8E8;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-en: "SF Pro Display", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
  --shadow-xl: 0 30px 80px rgba(0,0,0,0.20);
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1240px;
  --header-height: 76px;
}

/* ===== 基础重置 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-cn);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  overflow-x: hidden;
  letter-spacing: 0.01em;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font-family: inherit; outline: none; border: none; }

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg-alt); }
::-webkit-scrollbar-thumb { background: #c0c0c0; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #999; }

/* ===== 通用工具类 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--color-accent);
  font-family: var(--font-en);
  margin-bottom: 16px;
}

.section-label::before,
.section-label::after {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.4;
}

.section-heading {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-heading .highlight {
  color: var(--color-accent);
  position: relative;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

.divider {
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  margin: 24px auto;
  border-radius: 3px;
}

/* ===== 顶部信息栏 ===== */
.top-bar {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.75);
  font-size: 0.82rem;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  letter-spacing: 0.3px;
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.top-bar a { color: rgba(255,255,255,0.75); }
.top-bar a:hover { color: #fff; }

.top-bar .contact-info { display: flex; gap: 24px; flex-wrap: wrap; }

.top-bar .hotline {
  color: var(--color-accent-light);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.5px;
}

/* ===== 导航栏 ===== */
.navbar {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  height: var(--header-height);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: all 0.4s ease;
}

.navbar.scrolled {
  box-shadow: 0 2px 30px rgba(0,0,0,0.10);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.logo-icon-img {
  height: 46px;
  width: auto;
  display: block;
  flex-shrink: 0;
}

.logo-text small {
  display: block;
  font-size: 0.52rem;
  font-weight: 400;
  color: var(--color-text-muted);
  font-family: var(--font-en);
  letter-spacing: 1.2px;
  line-height: 1.2;
}

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

.nav-links a {
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover { color: var(--color-accent); background: rgba(196, 30, 58, 0.04); }

.nav-links a.active {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 3px;
}

.nav-cta {
  background: var(--color-accent) !important;
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
  margin-left: 12px;
  box-shadow: 0 4px 16px rgba(196, 30, 58, 0.25);
}

.nav-cta:hover {
  background: var(--color-accent-dark) !important;
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(196, 30, 58, 0.35);
}

.nav-cta.active::after { display: none; }

/* ===== 移动端导航按钮 ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  z-index: 1001;
}

.nav-toggle span {
  width: 28px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: 0.3s ease;
  transform-origin: center;
}

/* ===== HERO 主视觉 (Premium) ===== */
.hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #060F1A 0%, #0A1A2E 30%, #132D4A 60%, #0F2236 100%);
  overflow: hidden;
}

.hero-slides {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}

.hero-slide.active {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 75% 30%, rgba(196, 30, 58, 0.2) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 70%, rgba(200, 150, 62, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(20, 50, 80, 0.4) 0%, transparent 70%),
    linear-gradient(180deg, rgba(6, 15, 26, 0.6) 0%, rgba(10, 26, 46, 0.3) 50%, rgba(6, 15, 26, 0.8) 100%);
}

.hero .container {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 50px;
  width: 100%;
  padding-top: 20px;
  padding-bottom: 20px;
}

.hero-content { color: #fff; text-align: center; max-width: 720px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  padding: 8px 20px;
  border-radius: 30px;
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 28px;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.9);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent-light);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.6); }
}

.hero-content h1 {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 6px;
  letter-spacing: -0.03em;
}

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

.hero-content .hero-sub {
  font-size: 2.4rem;
  font-weight: 700;
  color: rgba(255,255,255,0.95);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-content .lead {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.7);
  margin: 0 auto 36px;
  max-width: 560px;
  line-height: 1.9;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: 0.3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
  color: #fff;
  box-shadow: 0 8px 30px rgba(196, 30, 58, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(196, 30, 58, 0.45);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.35);
}

.btn-outline-light:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.7);
  transform: translateY(-3px);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: #fff;
  transform: translateY(-3px);
}

.btn-light {
  background: #fff;
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-light:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.btn-sm { padding: 10px 22px; font-size: 0.85rem; }

/* Hero 使命·远景·价值观 — 3 列水平布局 */
.hero-mvv {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  width: 100%;
  max-width: 960px;
}

.hero-mvv-card {
  background: transparent;
  padding: 32px 28px;
  transition: opacity 0.35s ease;
  display: flex;
  align-items: flex-start;
  gap: 22px;
}

.hero-mvv-card:hover { opacity: 0.85; }

.hero-mvv-card .mvv-icon {
  width: 48px; height: 48px;
  flex-shrink: 0;
  margin-top: 2px;
}

.hero-mvv-card .mvv-icon svg { width: 100%; height: 100%; }

.mvv-mission .mvv-icon { color: var(--color-accent-light); }
.mvv-vision   .mvv-icon { color: var(--color-gold); }
.mvv-values   .mvv-icon { color: #4da6ff; }

.hero-mvv-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.hero-mvv-card p {
  font-size: 1.12rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
  margin: 0;
}

/* Hero 数据统计 — 4 列水平布局 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 880px;
}

.hero-stat-card {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 18px 14px;
  text-align: center;
  transition: all 0.35s ease;
}

.hero-stat-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-2px);
}

.hero-stat-card .number {
  font-size: 1.9rem;
  font-weight: 900;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-stat-card .number .hl {
  background: linear-gradient(135deg, var(--color-accent-light), #ff5a75);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-card .label {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.45);
  margin-top: 6px;
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* Hero 底部装饰 */
.hero-dec-line {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-gold), transparent);
  z-index: 3;
}

/* ===== 滚动动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }

/* ===== 区域分隔线 ===== */
.section-divider {
  width: 100%;
  height: 60px;
  position: relative;
}

.section-divider::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--color-border), transparent);
}

/* ===== About 区块 ===== */
.about-section {
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-image-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.about-image-wrap img {
  width: 100%;
  height: 460px;
  object-fit: cover;
  display: block;
}

.about-experience {
  position: absolute;
  bottom: -24px;
  right: 30px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
  padding: 24px 30px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: 0 16px 50px rgba(196, 30, 58, 0.40);
  animation: float-badge 4s ease-in-out infinite;
}

@keyframes float-badge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.about-experience .years {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
}

.about-experience .text {
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 4px;
  opacity: 0.9;
}

.about-content .section-label { margin-bottom: 12px; }
.about-content .section-heading { text-align: left; margin-bottom: 20px; }
.about-content .divider { margin: 0 0 28px 0; }
.about-content .about-text {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 20px;
}

.about-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 28px;
}

.about-feat-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  transition: var(--transition);
}

.about-feat-item:hover { background: #EEF0F3; transform: translateX(4px); }

.about-feat-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, rgba(196,30,58,0.1), rgba(196,30,58,0.05));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.about-feat-item h4 {
  font-size: 0.92rem;
  color: var(--color-primary);
  margin-bottom: 3px;
  font-weight: 700;
}

.about-feat-item p {
  font-size: 0.82rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===== 服务区块 ===== */
.services-section {
  background: var(--color-bg-alt);
  position: relative;
  overflow: hidden;
}

.services-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.03);
}

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

.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-card:hover::after { transform: scaleX(1); }

.service-icon-wrap {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 24px;
  box-shadow: 0 8px 24px rgba(10, 26, 46, 0.15);
  transition: var(--transition);
}

.service-card:hover .service-icon-wrap {
  transform: scale(1.05) rotate(-3deg);
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.75;
}

/* ===== 统计数据区块 ===== */
.stats-section {
  background: linear-gradient(135deg, #0A1A2E 0%, #0F2236 40%, #0C1C32 100%);
  color: #fff;
  padding: 70px 0;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 25% 50%, rgba(196,30,58,0.15) 0%, transparent 50%),
    radial-gradient(circle at 75% 50%, rgba(200,150,62,0.10) 0%, transparent 50%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
  z-index: 1;
  text-align: center;
}

.stat-item .stat-number {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  background: linear-gradient(180deg, #fff 0%, rgba(255,255,255,0.8) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .stat-number .accent {
  background: linear-gradient(135deg, var(--color-accent-light), #ff6b81);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .stat-label {
  font-size: 0.92rem;
  margin-top: 10px;
  color: rgba(255,255,255,0.65);
  font-weight: 500;
  letter-spacing: 1px;
}

/* ===== 时间线区块 ===== */
.timeline-section {
  background: var(--color-bg);
}

.timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: linear-gradient(180deg, transparent, var(--color-border), var(--color-accent), var(--color-border), transparent);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 50px;
  position: relative;
}

.timeline-item:nth-child(odd) { flex-direction: row; }
.timeline-item:nth-child(even) { flex-direction: row-reverse; }

.timeline-year {
  flex: 0 0 110px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.timeline-year .year-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
  padding: 6px 20px;
  border-radius: 20px;
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 14px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border-radius: 50%;
  transform: translateX(-50%);
  z-index: 1;
  border: 3px solid #fff;
  box-shadow: 0 0 0 4px rgba(196,30,58,0.2);
}

.timeline-content {
  flex: 1;
  max-width: 340px;
  background: #fff;
  padding: 24px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: var(--transition);
}

.timeline-content:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.timeline-content h3 {
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 8px;
  font-weight: 700;
}

.timeline-content p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 10px;
}

.timeline-img {
  width: 100%;
  max-width: 340px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-top: 6px;
  transition: transform 0.3s ease;
  cursor: pointer;
}
.timeline-img:hover {
  transform: scale(1.03);
}

.timeline-img.rotate-ccw {
  transform: rotate(-90deg);
}
.timeline-img.rotate-ccw:hover {
  transform: rotate(-90deg) scale(1.03);
}

/* ===== 客户区块 ===== */
.clients-section {
  background: var(--color-bg-alt);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.client-item {
  padding: 24px 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-light);
  transition: all 0.3s ease;
  background: #fff;
  letter-spacing: 0.5px;
}

.client-item img {
  max-width: 100%;
  max-height: 52px;
  object-fit: contain;
  opacity: 0.85;
  transition: all 0.3s ease;
}

.client-item:nth-child(5n) { border-right: none; }
.client-item:hover {
  background: #fff;
}
.client-item:hover img {
  opacity: 1;
  transform: scale(1.08);
}

/* ===== CTA 区块 ===== */
.cta-section {
  background: linear-gradient(135deg, var(--color-accent-dark), var(--color-accent), #a0152c);
  color: #fff;
  text-align: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.cta-section h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.cta-section p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 30px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

.btn-light-cta {
  background: #fff;
  color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  font-weight: 700;
}

.btn-light-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(0,0,0,0.3);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.65);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 50px;
  margin-bottom: 50px;
}

.footer h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 14px;
  font-weight: 700;
}

.footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  border-radius: 1px;
}

.footer-about p {
  font-size: 0.88rem;
  line-height: 1.9;
  margin-bottom: 18px;
}

.footer-links a {
  display: block;
  padding: 5px 0;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #fff;
  padding-left: 6px;
}

.footer-contact p {
  font-size: 0.88rem;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-hotline {
  font-size: 1.4rem !important;
  color: var(--color-accent-light) !important;
  font-weight: 800;
  margin: 8px 0 !important;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 22px 0;
  text-align: center;
  font-size: 0.83rem;
  color: rgba(255,255,255,0.4);
}

/* ===== 内页横幅 ===== */
.page-banner {
  background: linear-gradient(135deg, #0A1A2E, #132D4A);
  color: #fff;
  padding: 90px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 60%, rgba(196,30,58,0.12) 0%, transparent 60%),
    radial-gradient(circle at 70% 40%, rgba(200,150,62,0.08) 0%, transparent 50%);
}

.page-banner h1 {
  font-size: 2.8rem;
  font-weight: 900;
  position: relative;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.page-banner .breadcrumb {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  position: relative;
}

.page-banner .breadcrumb a { color: rgba(255,255,255,0.85); }
.page-banner .breadcrumb a:hover { color: #fff; }

/* ===== 服务详情页 ===== */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 10px 26px;
  border: 1.5px solid var(--color-border);
  background: #fff;
  border-radius: 50px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all 0.3s ease;
}

.filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-btn.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(196,30,58,0.25);
}

.services-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-detail-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: all 0.4s ease;
}

.service-detail-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-card-img {
  height: 250px;
  background: linear-gradient(135deg, #0A1A2E, #1a3a5c);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.service-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.service-detail-card:hover .service-card-img img {
  transform: scale(1.05);
}

.service-card-img::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(0deg, rgba(10,26,46,0.3), transparent);
  z-index: 1;
}

.service-card-img small {
  font-size: 0.8rem;
  margin-top: 6px;
  opacity: 0.6;
}

/* ===== 分类服务区块（文字+轮播） ===== */
.category-section {
  padding: 70px 0;
  position: relative;
}

.category-section:nth-child(odd) {
  background: var(--color-bg);
}

.category-section:nth-child(even) {
  background: var(--color-bg-alt);
}

.category-header {
  text-align: center;
  margin-bottom: 40px;
}

.category-header .section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--color-accent);
  font-family: var(--font-en);
  margin-bottom: 16px;
}

.category-header .section-label::before,
.category-header .section-label::after {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.4;
}

.category-header h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.category-header .divider {
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  margin: 16px auto;
  border-radius: 3px;
}

.category-desc {
  max-width: 700px;
  margin: 0 auto;
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.9;
  text-align: center;
}

/* 轮播容器 */
.carousel-wrap {
  position: relative;
  max-width: 600px;
  margin: 40px auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
  min-width: 100%;
  height: 400px;
  position: relative;
  background: linear-gradient(135deg, #0A1A2E, #1a3a5c);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.4);
  font-size: 1.1rem;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 轮播按钮 */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  transition: all 0.3s ease;
  z-index: 10;
  padding: 0;
}

.carousel-btn:hover {
  background: #fff;
  box-shadow: 0 6px 24px rgba(0,0,0,0.25);
  transform: translateY(-50%) scale(1.1);
}

.carousel-btn.prev { left: 16px; }
.carousel-btn.next { right: 16px; }

/* 轮播指示点 */
.carousel-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 0;
}

.carousel-dot.active {
  background: #fff;
  transform: scale(1.3);
}

/* 轮播响应式 */
@media (max-width: 1024px) {
  .carousel-slide { height: 320px; }
  .category-header h2 { font-size: 1.6rem; }
}

@media (max-width: 768px) {
  .carousel-slide { height: 240px; }
  .carousel-btn { width: 38px; height: 38px; font-size: 1rem; }
  .category-section { padding: 50px 0; }
}

.service-card-body {
  padding: 28px;
}

.service-card-body h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 10px;
  font-weight: 700;
}

.service-card-body p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.75;
  margin-bottom: 14px;
}

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

.tag {
  background: var(--color-bg-alt);
  color: var(--color-text-light);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 500;
}

/* ===== 关于我们页 ===== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.value-card {
  background: #fff;
  padding: 36px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: all 0.4s ease;
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.value-card .value-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, rgba(196,30,58,0.08), rgba(196,30,58,0.03));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.value-card h3 {
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 10px;
  font-weight: 700;
}

.value-card p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 服务宗旨 大字两行 */
.motto-text {
  font-size: 1.2rem !important;
  color: var(--color-primary) !important;
  letter-spacing: 2px;
  line-height: 2 !important;
}

/* 企业文化 "不是...而是..." 颜色区分 */
.not-text {
  color: #999;
  text-decoration: line-through;
}

.but-text {
  color: var(--color-accent);
  font-weight: 600;
}

/* 设备表格 */
.equipment-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.equipment-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

.equipment-table thead th {
  background: var(--color-primary);
  color: #fff;
  padding: 16px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}

.equipment-table tbody td {
  padding: 14px 20px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-light);
}

.equipment-table tbody tr:hover td {
  background: var(--color-bg-alt);
}

.equipment-table .count-col {
  color: var(--color-accent);
  font-weight: 700;
  text-align: right;
}

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

.cert-card {
  background: #fff;
  padding: 40px 30px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: all 0.4s ease;
}

.cert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

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

.cert-card h3 {
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 700;
}

/* ===== 联系我们页 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: start;
}

.contact-info-cards {
  display: grid;
  gap: 14px;
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: #fff;
  padding: 22px 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.03);
  transition: var(--transition);
}

.contact-info-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.contact-icon-circle {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(196,30,58,0.08), rgba(196,30,58,0.03));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.contact-info-card h4 {
  font-size: 0.92rem;
  color: var(--color-primary);
  margin-bottom: 4px;
  font-weight: 700;
}

.contact-info-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* 表单 */
.contact-form-wrap {
  background: #fff;
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0,0,0,0.04);
}

.contact-form-wrap h3 {
  font-size: 1.3rem;
  color: var(--color-primary);
  margin-bottom: 8px;
  font-weight: 800;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 0;
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.form-group label .required { color: var(--color-accent); }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: var(--transition);
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(196,30,58,0.06);
  background: #fff;
}

.form-group textarea { resize: vertical; min-height: 130px; }

.form-submit-btn {
  width: 100%;
  justify-content: center;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
}

/* 地图占位 */
.map-placeholder {
  width: 100%;
  height: 300px;
  background: linear-gradient(135deg, #EEF0F3, #E0E3E8);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  gap: 6px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  top: 24px;
  right: 24px;
  padding: 16px 28px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  animation: toastIn 0.4s ease, toastOut 0.4s ease 2.8s forwards;
}

@keyframes toastIn {
  from { transform: translateX(120%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes toastOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(120%); opacity: 0; }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero .container { gap: 36px; }
  .hero-mvv { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .hero-stats { grid-template-columns: repeat(4, 1fr); gap: 12px; }
  .hero-stat-card .number { font-size: 1.5rem; }
  .hero-content .lead { margin: 0 auto 36px; }
  .hero-btns { justify-content: center; }
  .hero-content h1 { font-size: 2.8rem; }
  .hero-content .hero-sub { font-size: 1.8rem; }

  .about-grid { grid-template-columns: 1fr; gap: 50px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .clients-grid { grid-template-columns: repeat(3, 1fr); }

  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .services-list { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }

  .section-heading { font-size: 2rem; }
  .section { padding: 70px 0; }
}

@media (max-width: 768px) {
  :root { --header-height: 64px; }

  .top-bar { display: none; }

  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 30px 20px;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
  }

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

  .nav-links a {
    display: block;
    padding: 14px 0;
    text-align: center;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--color-bg-alt);
  }

  .nav-cta { margin: 12px 0 0; }

  .nav-toggle { display: flex; }

  .hero { min-height: auto; padding: 80px 0 50px; }
  .hero-content h1 { font-size: 2.2rem; }
  .hero-content .hero-sub { font-size: 1.4rem; }
  .hero-mvv { grid-template-columns: 1fr; gap: 12px; max-width: 420px; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 12px; max-width: 420px; }
  .hero-mvv-card { flex-direction: row; }

  .section-heading { font-size: 1.8rem; }
  .section { padding: 50px 0; }

  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .stat-item .stat-number { font-size: 2.4rem; }

  .timeline::before { left: 30px; }
  .timeline-item, .timeline-item:nth-child(even) { flex-direction: row; }
  .timeline-dot { left: 30px; }
  .timeline-year { flex: 0 0 75px; }
  .timeline-content { max-width: none; margin-left: 10px; }

  .clients-grid { grid-template-columns: repeat(3, 1fr); }
  .client-item { padding: 22px 14px; }
  .client-item img { max-height: 36px; }

  .footer-grid { grid-template-columns: 1fr; gap: 35px; }

  .values-grid { grid-template-columns: 1fr 1fr; }
  .services-list { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .about-features-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .about-experience { right: 16px; bottom: -20px; padding: 18px 24px; }
  .about-experience .years { font-size: 2.4rem; }

  .page-banner h1 { font-size: 2rem; }
  .page-banner { padding: 60px 0; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.8rem; }
  .hero-content .hero-sub { font-size: 1.2rem; }
  .hero-mvv { gap: 10px; }
  .hero-mvv-card { padding: 18px; gap: 14px; }
  .hero-mvv-card .mvv-icon { width: 30px; height: 30px; }
  .hero-mvv-card h3 { font-size: 1.1rem; }
  .hero-mvv-card p { font-size: 0.88rem; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .hero-stat-card { padding: 16px 12px; }
  .hero-stat-card .number { font-size: 1.5rem; }

  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item .stat-number { font-size: 2rem; }
  .values-grid { grid-template-columns: 1fr; }
  .clients-grid { grid-template-columns: repeat(2, 1fr); }
  .section-heading { font-size: 1.5rem; }
}

/* ===== 打印 ===== */
@media print {
  .navbar, .top-bar, .footer, .cta-section, .nav-toggle, .hero-dec-line { display: none; }
  body { font-size: 12px; }
}