/* ============================================
   TOP PROTO - 科技感落地页样式表
   风格：浅色科技感 / 清爽专业
   配色：白灰(#f8fafc) + 电光蓝(#2563eb) + 青色(#06b6d4)
   特效：发光边框 / 玻璃拟态 / 动态渐变 / 科技网格
   ============================================ */

/* --- CSS 变量（全局设计令牌） --- */
:root {
  --color-bg-primary: #f8fafc;
  --color-bg-secondary: #f1f5f9;
  --color-bg-tertiary: #ffffff;
  --color-bg-card: rgba(255, 255, 255, 0.85);
  --color-bg-card-hover: rgba(255, 255, 255, 0.98);

  --color-blue: #2563eb;
  --color-blue-dark: #1e40af;
  --color-blue-light: #60a5fa;
  --color-blue-glow: #3b82f6;
  --color-cyan: #0891b2;
  --color-cyan-dark: #0e7490;
  --color-cyan-light: #22d3ee;

  --color-text-primary: #0f172a;
  --color-text-secondary: #334155;
  --color-text-muted: #64748b;

  --color-white: #ffffff;
  --color-border: rgba(37, 99, 235, 0.12);
  --color-border-hover: rgba(37, 99, 235, 0.3);

  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
  --shadow-glow-blue: 0 4px 24px rgba(37,99,235,0.25);
  --shadow-glow-cyan: 0 4px 24px rgba(6,182,212,0.2);
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --max-width: 1200px;
}

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

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

body {
  font-family: var(--font-primary);
  background: var(--color-bg-primary);
  color: var(--color-text-secondary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; }

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

/* --- 科技网格背景（通用） --- */
.tech-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image:
    linear-gradient(rgba(59,130,246,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  animation: grid-drift 60s linear infinite;
}

@keyframes grid-drift {
  0% { transform: translate(0, 0); }
  50% { transform: translate(12px, 8px); }
  100% { transform: translate(0, 0); }
}

/* --- 发光点阵装饰（带缓动动画） --- */
.tech-dots {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(59,130,246,0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  animation: dot-drift 40s linear infinite;
}

@keyframes dot-drift {
  0% { background-position: 0 0; }
  100% { background-position: 32px 32px; }
}

/* --- 渐变文字 --- */
.gradient-text {
  background: linear-gradient(135deg, var(--color-blue-light) 0%, var(--color-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- 霓虹下划线 --- */
.glow-underline {
  display: inline-block;
  position: relative;
}

.glow-underline::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-cyan), transparent);
  box-shadow: 0 0 10px var(--color-blue-glow);
}

/* ============================================
   通用排版
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: 60px;
  position: relative;
}

/* 科技装饰线 */
.section-header::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-blue), var(--color-cyan), transparent);
  border-radius: 2px;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.section-header h2 .highlight {
  background: linear-gradient(135deg, var(--color-blue-light) 0%, var(--color-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-blue-light);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
}

.section-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-blue);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-blue-glow);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============================================
   按钮系统
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-primary);
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-blue), #1e40af);
  color: var(--color-white);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 4px 16px rgba(37,99,235,0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-blue-light), var(--color-blue));
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(37,99,235,0.35);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-cyan), var(--color-blue));
  background-size: 200% 200%;
  border-radius: calc(var(--radius) + 2px);
  z-index: -1;
  opacity: 0;
  transition: var(--transition);
  animation: border-rotate 2s linear infinite;
}

.btn-primary:hover::before {
  opacity: 1;
}

@keyframes border-rotate {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border-color: rgba(15, 23, 42, 0.15);
}

.btn-outline:hover {
  border-color: var(--color-blue);
  color: var(--color-blue);
  box-shadow: 0 0 20px rgba(37,99,235,0.1);
  transform: translateY(-2px);
}

.btn-outline-blue {
  background: transparent;
  color: var(--color-blue-light);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.btn-outline-blue:hover {
  background: rgba(37,99,235,0.1);
  border-color: var(--color-blue);
  box-shadow: 0 0 20px rgba(37,99,235,0.15);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 18px 44px;
  font-size: 1.1rem;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.875rem;
}

/* ============================================
   顶部导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(59, 130, 246, 0.08);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: rgba(59, 130, 246, 0.12);
  box-shadow: 0 1px 20px rgba(0,0,0,0.06);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-primary);
  font-weight: 700;
}

.nav-logo img {
  max-height: 32px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-cyan));
  transition: var(--transition);
  box-shadow: 0 0 10px var(--color-blue-glow);
}

.nav-links a:hover {
  color: var(--color-blue);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  margin-left: 16px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================================
   首屏 Hero —— 科技感升级（浅色版）
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-bg-primary);
  overflow: hidden;
  padding-top: 76px;
}

/* 动态渐变背景 — 增强版（加入缓动动画） */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 25% 45%, rgba(37,99,235,0.10) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 75% 25%, rgba(6,182,212,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 80%, rgba(99,102,241,0.05) 0%, transparent 50%);
  animation: gradient-shift 12s ease-in-out infinite alternate;
  pointer-events: none;
}

/* 浮动几何装饰 — 增加层次感和科技氛围 */
.hero-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 2;
}

.hero-shapes span {
  position: absolute;
  border: 1px solid rgba(37,99,235,0.08);
  border-radius: 50%;
  animation: float-shape 20s infinite ease-in-out;
}

.hero-shapes span:nth-child(1) {
  width: 400px; height: 400px;
  top: -120px; right: -80px;
  animation-delay: 0s;
  animation-duration: 25s;
}

.hero-shapes span:nth-child(2) {
  width: 280px; height: 280px;
  bottom: 5%; left: -60px;
  animation-delay: -5s;
  animation-duration: 20s;
  border-color: rgba(6,182,212,0.06);
}

.hero-shapes span:nth-child(3) {
  width: 160px; height: 160px;
  top: 25%; right: 25%;
  animation-delay: -10s;
  animation-duration: 18s;
  border-color: rgba(99,102,241,0.06);
}

.hero-shapes span:nth-child(4),
.hero-shapes span:nth-child(5) {
  width: 50px; height: 50px;
  border-radius: 0;
  transform: rotate(45deg);
  border-color: rgba(37,99,235,0.05);
}

.hero-shapes span:nth-child(4) {
  top: 15%; left: 10%;
  animation-delay: -3s;
  animation-duration: 14s;
}

.hero-shapes span:nth-child(5) {
  bottom: 30%; right: 15%;
  animation-delay: -8s;
  animation-duration: 18s;
  border-color: rgba(6,182,212,0.05);
}

@keyframes float-shape {
  0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
  25% { transform: translate(40px, -50px) rotate(5deg) scale(1.05); }
  50% { transform: translate(-20px, 30px) rotate(-3deg) scale(0.95); }
  75% { transform: translate(50px, 20px) rotate(7deg) scale(1.02); }
}

@keyframes gradient-shift {
  0% {
    background:
      radial-gradient(ellipse 80% 60% at 25% 45%, rgba(37,99,235,0.10) 0%, transparent 70%),
      radial-gradient(ellipse 60% 50% at 75% 25%, rgba(6,182,212,0.07) 0%, transparent 60%),
      radial-gradient(ellipse 50% 40% at 50% 80%, rgba(99,102,241,0.05) 0%, transparent 50%);
  }
  50% {
    background:
      radial-gradient(ellipse 70% 55% at 60% 40%, rgba(37,99,235,0.08) 0%, transparent 65%),
      radial-gradient(ellipse 65% 45% at 25% 55%, rgba(6,182,212,0.06) 0%, transparent 55%),
      radial-gradient(ellipse 55% 50% at 70% 30%, rgba(99,102,241,0.04) 0%, transparent 50%);
  }
  100% {
    background:
      radial-gradient(ellipse 75% 50% at 45% 55%, rgba(37,99,235,0.09) 0%, transparent 60%),
      radial-gradient(ellipse 55% 55% at 60% 20%, rgba(6,182,212,0.07) 0%, transparent 50%),
      radial-gradient(ellipse 60% 45% at 15% 70%, rgba(99,102,241,0.05) 0%, transparent 55%);
  }
}

/* 科技网格覆盖 */
.hero-grid-pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(59,130,246,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 0;
}

/* 首页背景图 — 从左到右渐变显现 */
.hero-bg-image {
  position: absolute;
  inset: 0;
  background: url('../assets/hero-bg.png') right center / cover no-repeat;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, transparent 45%, rgba(0,0,0,0.15) 55%, rgba(0,0,0,0.5) 65%, rgba(0,0,0,0.8) 75%, #000 85%, #000 100%);
  mask-image: linear-gradient(to right, transparent 0%, transparent 45%, rgba(0,0,0,0.15) 55%, rgba(0,0,0,0.5) 65%, rgba(0,0,0,0.8) 75%, #000 85%, #000 100%);
  pointer-events: none;
  z-index: 1;
}

/* 在背景图上叠加一层极淡的彩色渐变，与页面主题融合 */
.hero-bg-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right,
    rgba(248,250,252,0) 30%,
    rgba(37,99,235,0.03) 60%,
    rgba(6,182,212,0.03) 100%
  );
  pointer-events: none;
}

/* 扫描线效果 */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(59,130,246,0.008) 2px,
    rgba(59,130,246,0.008) 4px
  );
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 3;
  padding-top: 40px;
  padding-bottom: 80px;
}

.hero-content {
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--color-blue);
  font-weight: 500;
  margin-bottom: 28px;
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.12);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(34,197,94,0.5);
  animation: pulse-dot 2s infinite;
}

.hero h1 {
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-text-primary);
  margin-bottom: 24px;
  letter-spacing: -1.5px;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, #2563eb 0%, #06b6d4 50%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, #60a5fa 0%, #22d3ee 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
  padding-top: 40px;
  border-top: 1px solid rgba(59, 130, 246, 0.08);
}

.hero-stat-item h3 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text-primary);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.hero-stat-item h3 .gradient-text {
  background: linear-gradient(135deg, var(--color-blue-light), var(--color-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
  margin-top: 4px;
}

/* --- 滚动指示器 --- */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.scroll-indicator-text {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.scroll-indicator-line {
  width: 1.5px;
  height: 32px;
  background: linear-gradient(to bottom, var(--color-blue), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.3; transform: scaleY(0.6); }
}

/* ============================================
   服务介绍 —— 玻璃拟态卡片
   ============================================ */
.services {
  padding: 120px 0;
  background: var(--color-bg-secondary);
  position: relative;
  overflow: hidden;
}

.services::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse, rgba(37,99,235,0.03) 0%, transparent 70%);
  pointer-events: none;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

/* 科技感四角括号装饰 */
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-blue), var(--color-cyan), transparent);
  opacity: 0;
  transition: var(--transition);
}

.service-card .corner-bracket {
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: var(--color-blue);
  border-style: solid;
  opacity: 0;
  transition: var(--transition);
}
.service-card .corner-bracket.tl { top: 8px; left: 8px; border-width: 2px 0 0 2px; }
.service-card .corner-bracket.tr { top: 8px; right: 8px; border-width: 2px 2px 0 0; }
.service-card .corner-bracket.bl { bottom: 8px; left: 8px; border-width: 0 0 2px 2px; }
.service-card .corner-bracket.br { bottom: 8px; right: 8px; border-width: 0 2px 2px 0; }

.service-card:hover .corner-bracket {
  opacity: 1;
}

.service-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(59,130,246,0.1), transparent, rgba(6,182,212,0.05));
  opacity: 0;
  transition: var(--transition);
  z-index: -1;
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(59, 130, 246, 0.2);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 40px rgba(37,99,235,0.05);
}

.service-card:hover::before {
  opacity: 1;
}

.service-card:hover::after {
  opacity: 1;
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.12);
  font-size: 1.5rem;
  position: relative;
}

.service-card:hover .service-icon {
  border-color: rgba(59, 130, 246, 0.25);
  box-shadow: 0 0 20px rgba(37,99,235,0.15), inset 0 0 20px rgba(37,99,235,0.05);
}

.service-card:hover .service-icon svg {
  stroke: var(--color-cyan-light);
  filter: drop-shadow(0 0 6px rgba(37,99,235,0.3));
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.service-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================
   产品展示 —— 发光图块
   ============================================ */
.products {
  padding: 120px 0;
  background: var(--color-bg-primary);
  position: relative;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.product-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-tertiary);
  aspect-ratio: 4/3;
  cursor: pointer;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.product-item img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-item:hover {
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 0 30px rgba(37,99,235,0.12), 0 8px 32px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}

.product-item:hover .product-item-overlay h4 {
  color: var(--color-blue-light);
}

.product-item:hover img {
  transform: scale(1.08);
}

.product-item-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(to top, rgba(7,11,20,0.88) 0%, rgba(7,11,20,0.4) 45%, rgba(7,11,20,0.08) 80%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  transition: var(--transition);
}

.product-item:hover .product-item-overlay {
  background: linear-gradient(to top, rgba(7,11,20,0.92) 0%, rgba(37,99,235,0.2) 50%, rgba(37,99,235,0.05) 80%, transparent 100%);
}

.product-item-overlay::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-item:hover .product-item-overlay::before {
  transform: scaleX(1);
}

.product-item-overlay h4 {
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 4px;
  text-shadow: 0 1px 8px rgba(0,0,0,0.3);
  position: relative;
}

.product-item-overlay p {
  color: rgba(255,255,255,0.75);
  font-size: 0.85rem;
  text-shadow: 0 1px 4px rgba(0,0,0,0.2);
  position: relative;
}

/* ============================================
   工厂实力
   ============================================ */
.factory {
  padding: 120px 0;
  background: var(--color-bg-secondary);
  position: relative;
  overflow: hidden;
}

.factory-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.factory-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-tertiary);
  aspect-ratio: 4/3;
  border: 1px solid var(--color-border);
}

.factory-image img.factory-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.factory-image-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(59, 130, 246, 0.1);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.factory-image-badge-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-cyan-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
  box-shadow: 0 0 16px rgba(37,99,235,0.2);
}

.factory-image-badge p {
  color: var(--color-text-primary);
  font-size: 0.9rem;
  font-weight: 600;
}

.factory-image-badge small {
  color: var(--color-text-secondary);
  font-size: 0.8rem;
}

.factory-content h2 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.factory-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}

.factory-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.factory-stat {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: rgba(59, 130, 246, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.factory-stat:hover {
  border-color: rgba(37, 99, 235, 0.25);
  background: rgba(37, 99, 235, 0.06);
  box-shadow: 0 0 20px rgba(37,99,235,0.06);
  transform: translateX(4px);
}

.factory-stat:hover .factory-stat-icon {
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 0 16px rgba(37,99,235,0.12);
}

.factory-stat-icon {
  width: 44px;
  height: 44px;
  background: rgba(59, 130, 246, 0.08);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
  border: 1px solid rgba(59, 130, 246, 0.1);
}

.factory-stat-text h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.factory-stat-text p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.factory-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.factory-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(37, 99, 235, 0.04);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: var(--transition);
}

.factory-badge:hover {
  border-color: rgba(37, 99, 235, 0.25);
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-blue);
  transform: translateY(-1px);
}

/* ============================================
   合作流程 —— 科技感连接线
   ============================================ */
.process {
  padding: 120px 0;
  background: var(--color-bg-secondary);
  position: relative;
  overflow: hidden;
}

/* 背景装饰圆 */
.process::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(37,99,235,0.03) 0%, transparent 70%);
  pointer-events: none;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 12%;
  right: 12%;
  height: 1.5px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-cyan), var(--color-blue));
  opacity: 0.3;
}

.process-step {
  text-align: center;
  padding: 0 16px;
  position: relative;
}

.process-step-num {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.06);
  border: 1.5px solid rgba(59, 130, 246, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 28px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-blue);
  position: relative;
  z-index: 2;
  transition: var(--transition);
}

/* 序号发光光晕 */
.process-step-num::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-blue), var(--color-cyan));
  opacity: 0;
  z-index: -1;
  filter: blur(8px);
  transition: var(--transition);
}

.process-step:hover .process-step-num {
  background: linear-gradient(135deg, var(--color-blue), var(--color-cyan-dark));
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 0 30px rgba(37,99,235,0.3);
  transform: scale(1.1);
}

.process-step:hover .process-step-num::after {
  opacity: 0.4;
}

.process-step h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 10px;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================
   客户评价
   ============================================ */
.testimonials {
  padding: 120px 0;
  background: var(--color-bg-secondary);
  position: relative;
}

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

.testimonial-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.testimonial-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-blue), var(--color-cyan), transparent);
  opacity: 0;
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.2);
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}

.testimonial-card:hover::before {
  opacity: 1;
}

.testimonial-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  color: #f59e0b;
  font-size: 1rem;
  filter: drop-shadow(0 0 4px rgba(245,158,11,0.2));
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(6,182,212,0.1));
  border: 1px solid rgba(59, 130, 246, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-blue-light);
  flex-shrink: 0;
}

.testimonial-info h5 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.testimonial-info p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ============================================
   联系表单
   ============================================ */
.contact {
  padding: 120px 0;
  background: var(--color-bg-primary);
  position: relative;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.contact-info > p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 36px;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(59, 130, 246, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.contact-method:hover {
  border-color: rgba(37, 99, 235, 0.2);
  background: rgba(37, 99, 235, 0.06);
  transform: translateX(4px);
  box-shadow: 0 0 16px rgba(37,99,235,0.05);
}

.contact-method-icon {
  width: 44px;
  height: 44px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}

.contact-method-text h5 {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 400;
  margin-bottom: 2px;
}

.contact-method-text p {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* --- 表单样式 --- */
.contact-form {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 44px;
  backdrop-filter: blur(12px);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.form-group label .required {
  color: #ef4444;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 0.95rem;
  font-family: var(--font-primary);
  border: 1.5px solid #d1d5db;
  border-radius: var(--radius);
  background: #ffffff;
  transition: var(--transition);
  color: #111827;
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #9ca3af;
  opacity: 1;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-blue);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group .error-message {
  font-size: 0.85rem;
  color: #ef4444;
  margin-top: 6px;
  display: none;
}

.form-group.error input,
.form-group.error textarea {
  border-color: #ef4444;
  background: rgba(239,68,68,0.05);
}

.form-group.error .error-message {
  display: block;
}

.form-submit {
  width: 100%;
  padding: 16px;
  font-size: 1.1rem;
  margin-top: 8px;
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.form-success {
  display: none;
  text-align: center;
  padding: 60px 20px;
}

.form-success.show {
  display: block;
}

.form-success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
}

.form-success-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(34,197,94,0.15), rgba(37,99,235,0.1));
  border: 1px solid rgba(34,197,94,0.2);
}

.form-success h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.form-success p {
  color: var(--color-text-muted);
}

/* ============================================
   页脚
   ============================================ */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.footer-brand .nav-logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 300px;
}

.footer h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  padding: 6px 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-blue-light);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.footer-contact-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.85rem;
}

/* ============================================
   回到顶部按钮
   ============================================ */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-blue-dark));
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 20px rgba(37,99,235,0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}

.scroll-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-blue);
}

/* ============================================
   滚动动画
   ============================================ */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ============================================
   响应式设计
   ============================================ */

/* 平板（<=1024px） */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 20px;
  }

  .process-steps::before { display: none; }

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

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

  .factory-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero h1 {
    font-size: 2.75rem;
  }

  .section-header h2,
  .factory-content h2,
  .contact-info h2 {
    font-size: 2rem;
  }
}

/* 手机（<=768px） */
@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    transform: translateY(-110%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid var(--color-border);
    visibility: hidden;
    pointer-events: none;
  }

  .nav-links.active {
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
  }

  .nav-logo {
    position: relative;
    z-index: 2;
  }

  .nav-toggle {
    position: relative;
    z-index: 2;
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
    font-size: 1rem;
    border-bottom: 1px solid rgba(59,130,246,0.06);
    color: var(--color-text-secondary);
    width: 100%;
  }

  .nav-links a::after { display: none; }

  .nav-cta {
    margin-left: 0;
    width: 100%;
    margin-top: 8px;
  }

  .nav-cta .btn {
    width: 100%;
  }

  .nav-logo img {
    height: 28px;
    max-width: 140px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 28px;
  }

  .hero-stat-item h3 {
    font-size: 1.5rem;
  }

  /* 移动端：背景图淡化，避免遮挡文字 */
  .hero-bg-image {
    opacity: 0.3;
    -webkit-mask-image: linear-gradient(to right, transparent 0%, transparent 50%, rgba(0,0,0,0.3) 65%, #000 80%, #000 100%);
    mask-image: linear-gradient(to right, transparent 0%, transparent 50%, rgba(0,0,0,0.3) 65%, #000 80%, #000 100%);
  }

  .section-header h2,
  .factory-content h2,
  .contact-info h2 {
    font-size: 1.65rem;
  }

  .container {
    padding: 0 20px;
  }

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

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

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

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 28px;
  }

  .process-steps {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .factory-stats {
    grid-template-columns: 1fr;
  }

  .scroll-top {
    right: 16px;
    width: 44px;
    height: 44px;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
  }

  .services,
  .products,
  .factory,
  .process,
  .testimonials,
  .contact {
    padding: 80px 0;
  }
}

/* 小屏手机（<=480px） */
@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.65rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-bg-image {
    opacity: 0.25;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .section-header h2,
  .factory-content h2,
  .contact-info h2 {
    font-size: 1.5rem;
  }
}

/* ============================================
   工具类
   ============================================ */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: var(--color-white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.toast {
  position: fixed;
  top: 100px;
  right: 24px;
  padding: 16px 24px;
  border-radius: var(--radius);
  color: var(--color-white);
  font-weight: 500;
  font-size: 0.95rem;
  z-index: 9999;
  opacity: 0;
  transform: translateX(100px);
  transition: var(--transition);
  max-width: 400px;
  backdrop-filter: blur(12px);
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast.success {
  background: rgba(22,163,74,0.9);
  border: 1px solid rgba(22,163,74,0.3);
}

.toast.error {
  background: rgba(220,38,38,0.9);
  border: 1px solid rgba(220,38,38,0.3);
}

/* ============================================
   Section 分隔装饰
   ============================================ */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59,130,246,0.15), transparent);
}