/* ============================================================
   湖北卓固钢构有限公司 - 全局样式表
   设计系统 · 响应式布局 · 组件样式 · 动画
   ============================================================ */

/* —— CSS Custom Properties (Design Tokens) —— */
:root {
  --color-primary: #0057B8;
  --color-primary-dark: #0A4DA2;
  --color-primary-light: #3380D0;
  --color-primary-bg: rgba(0, 87, 184, 0.06);
  --color-accent: #D4A548;
  --color-accent-dark: #C9A046;
  --color-accent-light: #E0C070;
  --color-accent-bg: rgba(212, 165, 72, 0.08);
  --color-brown: #D4A548;
  --color-brown-dark: #C9A046;
  --color-brown-light: #E0C070;
  --color-brown-bg: rgba(212, 165, 72, 0.08);
  --color-blue: #0057B8;
  --color-blue-dark: #0A4DA2;
  --color-blue-light: #3380D0;
  --color-blue-bg: rgba(0, 87, 184, 0.05);
  --color-cream: #F5F5F5;
  --color-cream-dark: #EBEBEB;
  --color-white: #ffffff;
  --color-black: #1a1a1a;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e8e8e8;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #8c8c8c;
  --color-gray-500: #595959;
  --color-gray-600: #404040;
  --color-gray-700: #2d2d2d;
  --color-gray-800: #1a1a1a;
  --color-gray-900: #0d0d0d;
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-heading: var(--font-family);
  --shadow-3d-sm: 0 2px 4px rgba(0,0,0,0.15), 0 1px 2px rgba(0,0,0,0.1);
  --shadow-3d: 0 4px 8px rgba(0,0,0,0.18), 0 2px 4px rgba(0,0,0,0.12);
  --shadow-3d-lg: 0 8px 16px rgba(0,0,0,0.2), 0 4px 8px rgba(0,0,0,0.12);
  --shadow-3d-xl: 0 12px 24px rgba(0,0,0,0.22), 0 6px 12px rgba(0,0,0,0.14);
  --shadow-inset: inset 0 2px 4px rgba(0,0,0,0.06);
  --gradient-3d: linear-gradient(135deg, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0) 50%, rgba(0,0,0,0.1) 100%);
  --font-xs: 0.75rem;
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 2rem;
  --font-4xl: 2.5rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-section: 4.5rem;
  --max-width: 1140px;
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.15);
  --transition: 0.3s ease;
  --transition-fast: 0.15s ease;
  --header-height: 68px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-base);
  line-height: 1.75;
  color: var(--color-gray-700);
  background: var(--color-cream);
  overflow-x: hidden;
  padding-top: var(--header-height);
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-blue);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-brown);
}

ul { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  color: var(--color-gray-900);
}

h1 { font-size: var(--font-4xl); }
h2 { font-size: var(--font-3xl); }
h3 { font-size: var(--font-2xl); }
h4 { font-size: var(--font-xl); }

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

/* —— Section —— */
.section {
  padding: var(--space-section) 0;
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.section.has-bg-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.88);
  z-index: 0;
}
/* 质保承诺区：极透遮罩，背景图凸显 */
.warranty-section.has-bg-img::before {
  background: rgba(0,0,0,0.2) !important;
}
.section.has-bg-img .container {
  position: relative;
  z-index: 1;
}
.section[data-bg-dark].has-bg-img::before {
  background: rgba(0,0,0,0.55);
}
.section[data-bg-dark].has-bg-img,
.section[data-bg-dark].has-bg-img h2,
.section[data-bg-dark].has-bg-img h3,
.section[data-bg-dark].has-bg-img p {
  color: #fff;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header h2 {
  color: var(--color-gray-900);
  margin-bottom: var(--space-sm);
}

.section-header .subtitle {
  color: var(--color-gray-600);
  font-size: var(--font-lg);
  font-weight: 500;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--color-brown), transparent);
  margin: var(--space-md) auto 0;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 4px rgba(184,106,43,0.3);
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 2rem;
  font-size: var(--font-base);
  font-weight: 600;
  font-family: var(--font-family);
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: var(--color-white);
}

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

.btn-outline:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-brown);
  border-color: var(--color-white);
}

.btn-white:hover {
  background: var(--color-cream-dark);
  border-color: var(--color-cream-dark);
}

.btn-blue {
  background: var(--color-blue);
  color: var(--color-white);
  border-color: var(--color-blue);
}

.btn-blue:hover {
  background: var(--color-blue-dark);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: var(--font-lg);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--font-sm);
}

.btn-block {
  width: 100%;
}

/* —— Header / Navigation —— */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-white);
  box-shadow: var(--shadow-3d-sm);
  transition: box-shadow var(--transition);
  height: var(--header-height);
}

.site-header.scrolled {
  box-shadow: var(--shadow-3d);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--color-brown);
  flex-shrink: 0;
}

.logo img {
  height: 40px;
  width: auto;
}

.logo:hover { color: var(--color-brown-dark); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-menu a {
  display: block;
  padding: 0.5rem 1rem;
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-accent);
  background: var(--color-accent-bg);
}

.nav-phone {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-accent);
  font-weight: 600;
  font-size: var(--font-sm);
  flex-shrink: 0;
}

.nav-phone svg {
  width: 18px;
  height: 18px;
}

/* Hamburger */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  gap: 5px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gray-800);
  border-radius: 2px;
  transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* —— Footer —— */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.9);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-col h3 {
  color: var(--color-white);
  font-size: var(--font-lg);
  margin-bottom: var(--space-lg);
}

.footer-col p,
.footer-col li {
  margin-bottom: var(--space-sm);
  font-size: var(--font-sm);
  line-height: 1.8;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
}

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

.footer-nav-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 var(--space-lg);
}

.footer-nav-2col li {
  margin-bottom: var(--space-xs);
}

.footer-qr {
  width: 120px;
  height: 120px;
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 8px;
  margin-bottom: var(--space-sm);
}

.footer-qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: var(--font-xs);
  color: rgba(255, 255, 255, 0.5);
}

/* —— Hero Section —— */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.hero-bg-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
  background-size: cover !important;
  background-position: center !important;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.48);
  z-index: 1;
}

.hero-bg-dots {
  position: absolute;
  bottom: 70px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 2;
}

.hero-bg-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all 0.3s;
}

.hero-bg-dot.active {
  background: var(--color-brown);
  box-shadow: 0 0 8px rgba(184,106,43,0.7);
  transform: scale(1.4);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
  padding: var(--space-2xl) var(--space-lg);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.hero:hover .hero-content,
.hero.touched .hero-content {
  opacity: 1;
}
/* 触屏设备首次点击显示 */
@media (hover: none) {
  .hero-content { opacity: 0; }
  .hero.touched .hero-content { opacity: 1; }
}
/* 圆点和滚动指示器始终可见 */
.hero-bg-dots { opacity: 1 !important; }
.hero-scroll { opacity: 0.6; transition: opacity 0.3s; }
.hero:hover .hero-scroll,
.hero.touched .hero-scroll { opacity: 0; }

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-brown-light);
  padding: 0.4rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: var(--font-sm);
  font-weight: 500;
  margin-bottom: var(--space-xl);
  letter-spacing: 0.05em;
}

.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-md);
  letter-spacing: 0.02em;
}

.hero-content .hero-subtitle {
  font-size: clamp(1rem, 2vw, var(--font-xl));
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.hero-features {
  display: flex;
  gap: var(--space-2xl);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-sm);
  color: rgba(255, 255, 255, 0.75);
}

.hero-feature .check-icon {
  width: 20px;
  height: 20px;
  color: var(--color-brown-light);
  flex-shrink: 0;
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.hero-scroll svg {
  width: 28px;
  height: 28px;
  color: rgba(255, 255, 255, 0.5);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* —— Service Cards —— */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.service-card {
  background: var(--color-white);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-3d);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-3d-xl);
}

.service-card .service-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  box-shadow: var(--shadow-3d), inset 0 1px 0 rgba(255,255,255,0.2);
  position: relative;
}
.service-card .service-icon::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 14px;
  background: var(--gradient-3d);
  pointer-events: none;
}

.service-card h3 {
  margin-bottom: var(--space-sm);
  font-size: var(--font-xl);
}

.service-card p {
  color: var(--color-gray-600);
  font-size: var(--font-sm);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.service-card .card-link {
  color: var(--color-accent);
  font-weight: 600;
  font-size: var(--font-sm);
}

/* —— Stats Section —— */
.stats-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: var(--space-2xl) 0;
  box-shadow: var(--shadow-inset);
}
.stat-item {
  color: var(--color-white);
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  text-align: center;
}

.stat-item {
  color: var(--color-white);
}

.stat-number {
  font-size: var(--font-4xl);
  font-weight: 800;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: var(--font-sm);
  opacity: 0.85;
}

/* —— Cases / Projects —— */
.cases-bg {
  background: var(--color-cream);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.case-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-3d);
  transition: all var(--transition);
  cursor: pointer;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-3d-xl);
}

.case-card .case-img {
  aspect-ratio: 4/3;
  background: var(--color-gray-200);
  overflow: hidden;
}

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

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

.case-card .case-info {
  padding: var(--space-lg);
}

.case-card .case-info h4 {
  margin-bottom: var(--space-xs);
}

.case-card .case-info .case-location {
  font-size: var(--font-sm);
  color: var(--color-gray-600);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* —— Process Flow (condensed) —— */
.process-horizontal {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
}

.process-horizontal::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: rgba(44,95,138,0.12);
  z-index: 0;
}

/* 流动光点沿连接线移动 */
.process-horizontal::after {
  content: '';
  position: absolute;
  top: 28px;
  left: 8%;
  width: 50px;
  height: 10px;
  background: radial-gradient(ellipse at center,
    rgba(255,255,255,0.9) 0%,
    rgba(180,210,255,0.6) 30%,
    rgba(44,95,138,0.2) 60%,
    transparent 100%
  );
  border-radius: 50%;
  z-index: 0;
  animation: processFlowGlow 4s ease-in-out infinite;
  filter: blur(1px);
}

@keyframes processFlowGlow {
  0%   { left: 8%; opacity: 0; }
  15%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { left: calc(92% - 50px); opacity: 0; }
}

.process-step {
  position: relative;
  z-index: 1;
  text-align: center;
  flex: 1;
  max-width: 140px;
}

.process-step .step-circle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fff 0%, #f0ebe0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  font-weight: 700;
  font-size: var(--font-lg);
  color: var(--color-brown);
  transition: all var(--transition);
  box-shadow: var(--shadow-3d), inset 0 2px 4px rgba(255,255,255,0.8);
  position: relative;
}

/* 步骤圆闪光环 */
.process-step .step-circle::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid transparent;
  opacity: 0;
  transition: all 0.4s;
}
.process-step:nth-child(1) .step-circle::before { animation: stepFlash 4s ease-in-out infinite; }
.process-step:nth-child(2) .step-circle::before { animation: stepFlash 4s ease-in-out 0.65s infinite; }
.process-step:nth-child(3) .step-circle::before { animation: stepFlash 4s ease-in-out 1.3s infinite; }
.process-step:nth-child(4) .step-circle::before { animation: stepFlash 4s ease-in-out 1.95s infinite; }
.process-step:nth-child(5) .step-circle::before { animation: stepFlash 4s ease-in-out 2.6s infinite; }
.process-step:nth-child(6) .step-circle::before { animation: stepFlash 4s ease-in-out 3.25s infinite; }

@keyframes stepFlash {
  0%, 10%  { border-color: transparent; box-shadow: none; opacity: 0; }
  15%, 25% { border-color: rgba(44,95,138,0.6); box-shadow: 0 0 12px rgba(44,95,138,0.4), 0 0 24px rgba(180,210,255,0.3); opacity: 1; }
  30%, 100% { border-color: transparent; box-shadow: none; opacity: 0; }
}

.process-step:hover .step-circle {
  background: linear-gradient(135deg, var(--color-brown) 0%, var(--color-brown-dark) 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-3d-lg);
  transform: translateY(-4px);
}
.process-step:hover .step-circle::before {
  animation: none;
  border-color: rgba(184,106,43,0.5);
  box-shadow: 0 0 16px rgba(184,106,43,0.35);
  opacity: 1;
}

.process-step h4 {
  font-size: var(--font-sm);
  margin-bottom: var(--space-xs);
}

.process-step .step-desc {
  font-size: var(--font-xs);
  color: var(--color-gray-600);
}

/* —— Warranty Section —— */
.warranty-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
}

.warranty-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.warranty-content h2 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.warranty-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.warranty-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  font-size: var(--font-lg);
}

.warranty-list li svg {
  width: 24px;
  height: 24px;
  color: var(--color-brown-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.warranty-badge {
  text-align: center;
}

.warranty-badge .badge-circle {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.05) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  box-shadow: var(--shadow-3d-xl), inset 0 2px 8px rgba(255,255,255,0.15);
}

.warranty-badge .badge-circle .years {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-brown-light);
}

.warranty-badge .badge-circle .text {
  font-size: var(--font-sm);
  opacity: 0.8;
}

/* —— Contact CTA —— */
.contact-cta {
  text-align: center;
  background: var(--color-white);
}

.contact-card-inline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-2xl) var(--space-3xl);
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-3d-sm);
}

.contact-item-inline {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-3d-sm);
  transition: all var(--transition);
}

.contact-item-inline:hover {
  box-shadow: var(--shadow-3d);
  transform: translateY(-2px);
}

.contact-item-inline svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.contact-item-inline .contact-label {
  font-size: var(--font-xs);
  color: var(--color-gray-600);
  text-align: left;
  font-weight: 500;
}

.contact-item-inline .contact-value {
  font-weight: 600;
  color: var(--color-gray-900);
  text-align: left;
}

/* —— Floating Consult —— */
.floating-consult {
  position: fixed;
  right: 24px;
  bottom: 80px;
  z-index: 999;
}

.consult-trigger {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  position: relative;
}

.consult-trigger:hover {
  background: var(--color-accent-dark);
  transform: scale(1.05);
}

.consult-trigger svg {
  width: 26px;
  height: 26px;
}

.consult-panel {
  position: absolute;
  right: 0;
  bottom: 68px;
  width: 240px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: scale(0);
  transform-origin: bottom right;
  transition: transform var(--transition);
}

.consult-panel.open {
  transform: scale(1);
}

.consult-panel a,
.consult-panel .wechat-block {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  font-size: var(--font-sm);
  color: var(--color-gray-800);
  transition: background var(--transition-fast);
}

.consult-panel a:hover {
  background: var(--color-gray-50);
}

.consult-panel .wechat-block {
  flex-direction: column;
  text-align: center;
  border-top: 1px solid var(--color-gray-200);
}

.consult-panel .wechat-block img {
  width: 120px;
  height: 120px;
  object-fit: contain;
}

.consult-panel svg {
  width: 20px;
  height: 20px;
  color: var(--color-brown);
  flex-shrink: 0;
}

/* —— Privacy Banner —— */
.privacy-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 998;
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--space-md) var(--space-lg);
  display: none;
  transform: translateY(100%);
  transition: transform var(--transition);
}

.privacy-banner.visible {
  transform: translateY(0);
}

.privacy-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  flex-wrap: wrap;
}

.privacy-inner p {
  font-size: var(--font-sm);
  flex: 1;
  min-width: 200px;
}

.privacy-btns {
  display: flex;
  gap: var(--space-sm);
  flex-shrink: 0;
}

/* —— Scroll Reveal —— */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* —— Page Title Banner —— */
.page-banner {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-3xl) 0;
}

.page-banner h1 {
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.page-banner .breadcrumb {
  font-size: var(--font-sm);
  opacity: 0.8;
}

.page-banner .breadcrumb a {
  color: rgba(255, 255, 255, 0.9);
}

/* —— About Page —— */
.about-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-story .about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-gray-200);
}

.about-story .about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-story .about-text h2 {
  margin-bottom: var(--space-lg);
}

.about-story .about-text p {
  margin-bottom: var(--space-md);
  color: var(--color-gray-600);
  line-height: 1.9;
}

/* —— Values Grid —— */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.value-card {
  text-align: center;
  padding: var(--space-xl);
  background: var(--color-white);
  border: none;
  border-radius: var(--radius);
  transition: all var(--transition);
  box-shadow: var(--shadow-3d-sm);
}

.value-card:hover {
  box-shadow: var(--shadow-3d-lg);
  transform: translateY(-4px);
}

.value-card .value-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-md);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  box-shadow: var(--shadow-3d), inset 0 1px 0 rgba(255,255,255,0.2);
}

.value-card h3 {
  margin-bottom: var(--space-sm);
}

.value-card p {
  font-size: var(--font-sm);
  color: var(--color-gray-600);
}

/* —— Services Page —— */
.service-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.service-tab {
  padding: 0.75rem 2rem;
  background: var(--color-gray-100);
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  font-size: var(--font-base);
  font-weight: 500;
  color: var(--color-gray-600);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-family);
}

.service-tab:hover {
  background: var(--color-brown-bg);
  color: var(--color-brown);
}

.service-tab.active {
  background: var(--color-brown);
  color: var(--color-white);
  border-color: var(--color-brown);
}

.service-detail-section {
  margin-bottom: var(--space-3xl);
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.service-detail-section:last-child {
  margin-bottom: 0;
}

.service-detail-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.service-detail-header .sd-icon {
  width: 48px;
  height: 48px;
  background: var(--color-brown-bg);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-brown);
  flex-shrink: 0;
}

.service-images {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}

.service-images .si-item {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-gray-200);
}

.service-images .si-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Pricing Table */
.pricing-table-wrap {
  overflow-x: auto;
  margin: var(--space-xl) 0;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.pricing-table thead {
  background: var(--color-blue);
  color: var(--color-white);
}

.pricing-table th {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  font-weight: 600;
  font-size: var(--font-sm);
  white-space: nowrap;
}

.pricing-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-gray-200);
  font-size: var(--font-sm);
}

.pricing-table tbody tr:hover {
  background: var(--color-gray-50);
}

.pricing-table .price-highlight {
  color: var(--color-brown);
  font-weight: 700;
}

/* FAQ Accordion */
.faq-list {
  margin-top: var(--space-xl);
}

.faq-item {
  border: none;
  border-radius: var(--radius);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  box-shadow: var(--shadow-3d-sm);
}

.faq-question {
  width: 100%;
  padding: var(--space-lg);
  background: var(--color-white);
  border: none;
  text-align: left;
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--color-gray-800);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-family);
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-gray-50);
}

.faq-question .faq-arrow {
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: var(--space-md);
}

.faq-question.open .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer.open {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-gray-700);
  font-size: var(--font-sm);
  line-height: 1.8;
}

/* —— Team Page —— */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.team-card {
  background: var(--color-white);
  border: none;
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-align: center;
  transition: all var(--transition);
  box-shadow: var(--shadow-3d);
}

.team-card:hover {
  box-shadow: var(--shadow-3d-xl);
  transform: translateY(-6px);
}

.team-card .team-photo {
  aspect-ratio: 1/1;
  background: var(--color-gray-200);
  overflow: hidden;
}

.team-card .team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-card .team-info {
  padding: var(--space-lg);
}

.team-card .team-info h3 {
  margin-bottom: var(--space-xs);
}

.team-card .team-info .role {
  color: var(--color-brown);
  font-weight: 600;
  font-size: var(--font-sm);
  margin-bottom: var(--space-sm);
}

.team-card .team-info .exp {
  font-size: var(--font-sm);
  color: var(--color-gray-600);
}

/* —— Process Page —— */
.process-timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.process-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--color-brown-light), var(--color-brown), var(--color-brown-dark));
  transform: translateX(-50%);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(184,106,43,0.2);
}

/* 时间线流动光点 */
.process-timeline::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: radial-gradient(circle,
    rgba(255,255,255,1) 0%,
    rgba(180,210,255,0.8) 30%,
    rgba(44,95,138,0.4) 60%,
    transparent 100%
  );
  border-radius: 50%;
  z-index: 1;
  animation: timelineFlow 6s linear infinite;
  box-shadow: 0 0 10px rgba(180,210,255,0.6), 0 0 20px rgba(44,95,138,0.3);
}

@keyframes timelineFlow {
  0%   { top: 0; opacity: 0; }
  5%   { opacity: 1; }
  95%  { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.timeline-item {
  display: flex;
  margin-bottom: var(--space-2xl);
  position: relative;
}

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

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

.timeline-marker {
  position: absolute;
  left: 50%;
  top: 20px;
  transform: translateX(-50%);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-brown) 0%, var(--color-brown-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-white);
  z-index: 1;
  font-size: var(--font-sm);
  box-shadow: var(--shadow-3d), 0 0 0 4px rgba(184,106,43,0.15);
}

/* 时间线标记闪烁（随流动光点依次触发） */
.timeline-item:nth-child(1) .timeline-marker { animation: markerPulse 6s ease-in-out infinite; }
.timeline-item:nth-child(2) .timeline-marker { animation: markerPulse 6s ease-in-out 1s infinite; }
.timeline-item:nth-child(3) .timeline-marker { animation: markerPulse 6s ease-in-out 2s infinite; }
.timeline-item:nth-child(4) .timeline-marker { animation: markerPulse 6s ease-in-out 3s infinite; }
.timeline-item:nth-child(5) .timeline-marker { animation: markerPulse 6s ease-in-out 4s infinite; }
.timeline-item:nth-child(6) .timeline-marker { animation: markerPulse 6s ease-in-out 5s infinite; }

@keyframes markerPulse {
  0%, 8%  { box-shadow: var(--shadow-3d), 0 0 0 4px rgba(184,106,43,0.15); }
  10%, 16% { box-shadow: var(--shadow-3d-lg), 0 0 0 8px rgba(44,95,138,0.25), 0 0 20px rgba(180,210,255,0.4); }
  20%, 100% { box-shadow: var(--shadow-3d), 0 0 0 4px rgba(184,106,43,0.15); }
}

.timeline-content {
  width: calc(50% - 50px);
  background: var(--color-white);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-3d);
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-right: auto;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: auto;
}

.timeline-content h3 {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: var(--font-lg);
}

.timeline-content .step-photo {
  margin-top: var(--space-md);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--color-gray-200);
}

.timeline-content .step-time {
  display: inline-block;
  background: var(--color-brown-bg);
  color: var(--color-brown);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 600;
  margin-top: var(--space-sm);
}

/* —— Quote Page —— */
.quote-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.quote-form-wrap {
  background: var(--color-white);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-3d-lg);
}

.quote-form-wrap h2 {
  margin-bottom: var(--space-xs);
}

.quote-form-wrap .form-subtitle {
  color: var(--color-gray-500);
  font-size: var(--font-sm);
  margin-bottom: var(--space-xl);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  font-size: var(--font-sm);
  color: var(--color-gray-700);
}

.form-group label .required {
  color: #e53e3e;
  margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  font-size: var(--font-base);
  font-family: var(--font-family);
  color: var(--color-gray-800);
  background: var(--color-white);
  transition: border-color var(--transition-fast);
  outline: none;
}

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

.form-input.error,
.form-select.error {
  border-color: #e53e3e;
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-error {
  color: #e53e3e;
  font-size: var(--font-xs);
  margin-top: var(--space-xs);
  display: none;
}

.form-error.visible {
  display: block;
}

/* Quote Result */
.quote-result-wrap {
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.quote-result-card {
  background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-blue-dark) 100%);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
}

.quote-result-card h3 {
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.quote-result-placeholder {
  text-align: center;
  padding: var(--space-2xl) 0;
  opacity: 0.7;
}

.quote-result-placeholder svg {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

#quote-result {
  display: none;
}

#quote-result.show {
  display: block;
}

.quote-price {
  text-align: center;
  padding: var(--space-xl) 0;
}

.quote-price .price-range {
  font-size: var(--font-4xl);
  font-weight: 800;
  color: var(--color-brown-light);
  margin-bottom: var(--space-xs);
}

.quote-price .price-unit {
  font-size: var(--font-sm);
  opacity: 0.8;
}

.quote-breakdown {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.quote-breakdown .qb-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  font-size: var(--font-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.quote-breakdown .qb-row:last-child {
  border-bottom: none;
  font-weight: 700;
}

.quote-disclaimer {
  font-size: var(--font-xs);
  opacity: 0.7;
  text-align: center;
  margin-bottom: var(--space-lg);
}

/* —— Contact Page —— */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.contact-info-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-white);
  border: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  box-shadow: var(--shadow-3d);
}

.contact-info-card:hover {
  box-shadow: var(--shadow-3d-xl);
  transform: translateY(-4px);
}

.contact-info-card .ci-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  color: var(--color-white);
  box-shadow: var(--shadow-3d), inset 0 1px 0 rgba(255,255,255,0.2);
}

.contact-info-card h3 {
  margin-bottom: var(--space-sm);
}

.contact-info-card p {
  color: var(--color-gray-500);
  font-size: var(--font-sm);
  line-height: 1.8;
}

.contact-form-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-gray-200);
}

.contact-map img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* —— Lightbox —— */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.lightbox.open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}

.lightbox-content img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: var(--color-white);
  cursor: pointer;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
  z-index: 1;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255, 255, 255, 0.3);
}

.lightbox-close {
  top: -50px;
  right: 0;
  width: 40px;
  height: 40px;
  font-size: 1.5rem;
}

.lightbox-prev,
.lightbox-next {
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
}

.lightbox-prev { left: -60px; }
.lightbox-next { right: -60px; }

.lightbox-caption {
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-sm) 0;
  font-size: var(--font-sm);
}

/* —— Privacy Page —— */
.privacy-content {
  max-width: 800px;
  margin: 0 auto;
}

.privacy-content h3 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.privacy-content p {
  margin-bottom: var(--space-md);
  color: var(--color-gray-600);
  line-height: 1.9;
}

/* —— Success Toast —— */
.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  background: #38a169;
  color: var(--color-white);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius);
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: opacity var(--transition);
}

.toast.show {
  opacity: 1;
}

/* —— Utility Classes —— */
.text-center { text-align: center; }
.text-brown { color: var(--color-brown); }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }
.bg-cream { background: var(--color-cream); }
.bg-white { background: var(--color-white); }
.hidden { display: none !important; }

/* —— Responsive: Tablet (768px) —— */
@media (max-width: 1023px) {
  :root {
    --font-4xl: 2rem;
    --font-3xl: 1.75rem;
    --font-2xl: 1.25rem;
    --space-section: 3.5rem;
    --space-3xl: 2.5rem;
  }

  .nav-phone { display: none; }

  .service-grid,
  .case-grid,
  .team-grid,
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .about-story,
  .warranty-grid,
  .quote-layout,
  .contact-form-section {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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

  .process-horizontal::before { display: none; }
  .process-horizontal {
    flex-wrap: wrap;
    gap: var(--space-lg);
    justify-content: center;
  }
  .process-step { max-width: 120px; }

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

  .process-timeline::before {
    left: 20px;
  }

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

  .timeline-marker {
    left: 20px;
  }

  .timeline-content {
    width: calc(100% - 60px);
    margin-left: 60px !important;
    margin-right: 0 !important;
  }

  .service-images {
    grid-template-columns: repeat(2, 1fr);
  }

  .quote-result-wrap {
    position: static;
  }

  .hero-features {
    gap: var(--space-lg);
  }
}

/* —— Responsive: Mobile (under 768px) —— */
@media (max-width: 767px) {
  :root {
    --font-4xl: 1.75rem;
    --font-3xl: 1.5rem;
    --font-2xl: 1.25rem;
    --header-height: 60px;
    --space-section: 3rem;
    --space-3xl: 2rem;
    --space-2xl: 2rem;
    --space-xl: 1.5rem;
  }

  .menu-toggle { display: flex; }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-xl);
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 999;
    gap: var(--space-sm);
  }

  .nav-menu.nav-open {
    transform: translateX(0);
  }

  .nav-menu a {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-base);
    width: 100%;
  }

  .service-grid,
  .case-grid,
  .team-grid,
  .values-grid,
  .contact-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    padding: var(--space-xl) var(--space-md);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 280px;
  }

  .hero-features {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  .warranty-badge .badge-circle {
    width: 150px;
    height: 150px;
  }

  .warranty-badge .badge-circle .years {
    font-size: 2.5rem;
  }

  .floating-consult {
    right: 12px;
    bottom: 60px;
  }

  .consult-trigger {
    width: 48px;
    height: 48px;
  }

  .consult-panel {
    width: 220px;
    right: 0;
  }

  .service-images {
    grid-template-columns: 1fr;
  }

  .contact-card-inline {
    flex-direction: column;
    gap: var(--space-lg);
    padding: var(--space-xl);
  }

  .section-header {
    margin-bottom: var(--space-2xl);
  }

  .lightbox-prev, .lightbox-next {
    width: 36px;
    height: 36px;
  }
  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }

  .privacy-inner {
    flex-direction: column;
    text-align: center;
  }

  .pricing-table-wrap {
    margin: var(--space-lg) -16px;
    width: calc(100% + 32px);
    padding: 0 16px;
  }
}

/* —— 钢构线条流动动画 —— */
@keyframes steelFlow {
  0%   { stroke-dashoffset: 1000; opacity: 0.3; }
  30%  { opacity: 1; }
  70%  { opacity: 1; }
  100% { stroke-dashoffset: -1000; opacity: 0.3; }
}
@keyframes particleMove {
  0%   { offset-distance: 0%; opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}
@keyframes nodePulse {
  0%, 100% { r: 3; opacity: 0.4; }
  50%      { r: 6; opacity: 1; }
}

.steel-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}
.steel-lines svg {
  width: 100%;
  height: 100%;
}
.steel-line-path {
  fill: none;
  stroke: rgba(44,95,138,0.2);
  stroke-width: 1.5;
  stroke-dasharray: 40 120;
  animation: steelFlow 6s linear infinite;
}
.steel-line-path:nth-child(2) { animation-delay: -2s; stroke: rgba(184,106,43,0.18); }
.steel-line-path:nth-child(3) { animation-delay: -4s; stroke: rgba(44,95,138,0.15); }
.steel-node {
  fill: rgba(44,95,138,0.5);
  animation: nodePulse 3s ease-in-out infinite;
}
.steel-node:nth-child(odd) { animation-delay: -1.5s; fill: rgba(184,106,43,0.4); }

/* 流动分隔线 */
.flow-divider {
  position: relative;
  height: 2px;
  background: transparent;
  overflow: hidden;
  margin: 0 auto;
  max-width: var(--max-width);
}
.flow-divider::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(44,95,138,0.1) 20%,
    rgba(184,106,43,0.4) 50%,
    rgba(44,95,138,0.1) 80%,
    transparent 100%
  );
  animation: dividerFlow 4s ease-in-out infinite;
}
@keyframes dividerFlow {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* —— 钢材光泽微动效 (按钮/卡片 hover) —— */
@keyframes steelGloss {
  0%   { left: -100%; opacity: 0; }
  15%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

.btn-primary, .btn-outline, .btn-white, .btn-blue {
  position: relative;
  overflow: hidden;
}
.btn-primary::after, .btn-outline::after, .btn-white::after, .btn-blue::after {
  content: '';
  position: absolute;
  top: -20%;
  left: -100%;
  width: 60%;
  height: 140%;
  background: linear-gradient(105deg,
    transparent 0%,
    rgba(255,255,255,0) 35%,
    rgba(255,255,255,0.25) 45%,
    rgba(255,255,255,0.35) 50%,
    rgba(255,255,255,0.25) 55%,
    rgba(255,255,255,0) 65%,
    transparent 100%
  );
  transform: skewX(-20deg);
  pointer-events: none;
}
.btn-primary:hover::after, .btn-outline:hover::after, .btn-white:hover::after, .btn-blue:hover::after {
  animation: steelGloss 0.8s ease-in-out;
}

/* 卡片 hover 光泽 */
.service-card, .value-card, .team-card, .case-card, .contact-info-card {
  position: relative;
  overflow: hidden;
}
.service-card::after, .value-card::after, .team-card::after, .case-card::after, .contact-info-card::after {
  content: '';
  position: absolute;
  top: -30%;
  left: -100%;
  width: 50%;
  height: 160%;
  background: linear-gradient(105deg,
    transparent 0%,
    rgba(255,255,255,0) 40%,
    rgba(184,106,43,0.08) 48%,
    rgba(184,106,43,0.12) 50%,
    rgba(184,106,43,0.08) 52%,
    rgba(255,255,255,0) 60%,
    transparent 100%
  );
  transform: skewX(-15deg);
  pointer-events: none;
  z-index: 2;
}
.service-card:hover::after, .value-card:hover::after, .team-card:hover::after,
.case-card:hover::after, .contact-info-card:hover::after {
  animation: steelGloss 0.9s ease-in-out;
}

/* 服务图标光泽环 */
.service-card .service-icon::before {
  content: '';
  position: absolute;
  top: -30%;
  left: -30%;
  width: 60%;
  height: 160%;
  background: linear-gradient(180deg,
    rgba(255,255,255,0.4) 0%,
    rgba(255,255,255,0) 100%
  );
  transform: rotate(-30deg);
  border-radius: 50%;
  pointer-events: none;
}
.service-card:hover .service-icon::before {
  animation: steelGloss 0.7s ease-in-out;
}

/* ——— 页面间流动过渡线 ——— */
.section-transition {
  position: relative;
  padding: 0;
  height: 40px;
  overflow: hidden;
}
.section-transition .flow-lines {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
}
.section-transition .flow-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-brown);
  animation: flowDotMove 3s ease-in-out infinite;
  box-shadow: 0 0 6px rgba(184,106,43,0.3);
}
.section-transition .flow-dot:nth-child(2) { animation-delay: -1s; }
.section-transition .flow-dot:nth-child(3) { animation-delay: -2s; }
.section-transition .flow-dot:nth-child(4) { animation-delay: -0.5s; }
.section-transition .flow-dot:nth-child(5) { animation-delay: -1.5s; }
.section-transition .flow-dot:nth-child(6) { animation-delay: -2.5s; }
.section-transition .flow-dot:nth-child(7) { animation-delay: -0.8s; }
.section-transition .flow-dot:nth-child(8) { animation-delay: -1.8s; }

@keyframes flowDotMove {
  0%   { transform: translateX(-300px); opacity: 0; }
  20%  { opacity: 1; }
  80%  { opacity: 1; }
  100% { transform: translateX(300px); opacity: 0; }
}

@media (max-width: 767px) {
  .section-transition { height: 24px; }
  .section-transition .flow-lines { gap: 30px; }
}

/* —— SOP 流程节点流动动画 —— */
.sop-flow-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}
.sop-flow-overlay svg {
  width: 100%;
  height: 100%;
}
.sop-connector {
  fill: none;
  stroke: rgba(44,95,138,0.15);
  stroke-width: 2;
}
.sop-flow-particle {
  fill: none;
  stroke: rgba(255,255,255,0.9);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 8 200;
  animation: sopFlowParticle 4s linear infinite;
  filter: drop-shadow(0 0 4px rgba(180,210,255,0.8));
}
.sop-flow-particle:nth-child(2) { animation-delay: -1.5s; stroke: rgba(200,220,255,0.7); }
.sop-flow-particle:nth-child(3) { animation-delay: -3s; stroke: rgba(255,255,255,0.6); }

@keyframes sopFlowParticle {
  0%   { stroke-dashoffset: 200; }
  100% { stroke-dashoffset: -200; }
}

.sop-node-ring {
  fill: none;
  stroke: rgba(44,95,138,0.2);
  stroke-width: 2;
}
.sop-node-dot {
  fill: rgba(44,95,138,0.55);
  transition: all 0.3s;
}
.sop-node-flash {
  fill: none;
  stroke: rgba(255,255,255,0.8);
  stroke-width: 2;
  opacity: 0;
  animation: sopNodeFlicker 4s ease-in-out infinite;
}
.sop-node-flash:nth-child(3) { animation-delay: -1.5s; }
.sop-node-flash:nth-child(4) { animation-delay: -3s; }

@keyframes sopNodeFlicker {
  0%, 14%  { opacity: 0; r: 8; }
  16%, 18% { opacity: 0.9; r: 14; }
  20%, 100% { opacity: 0; r: 8; }
}

/* 流程区需要 relative 定位才能放 overlay */
.process-section-wrap {
  position: relative;
}

@media (max-width: 767px) {
  .sop-flow-overlay svg { min-width: 600px; }
}

/* —— Print Styles —— */
@media print {
  .site-header,
  .floating-consult,
  .privacy-banner,
  .menu-toggle,
  .hero-scroll { display: none !important; }
  body { padding-top: 0; }
  .section { padding: 1.5rem 0; }
}