/* ===== 全局变量与重置 ===== */
:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-tertiary: #F1F5F9;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFC;
  --color-primary: #0EA5E9;
  --color-primary-dark: #0284C7;
  --color-primary-light: #E0F2FE;
  --color-primary-dim: rgba(14, 165, 233, 0.08);
  --color-accent: #F97316;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --border-color: #E2E8F0;
  --border-hover: #0EA5E9;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 20px 48px rgba(14, 165, 233, 0.12);
  --max-width: 1280px;
  --nav-height: 72px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== 滚动进度条 ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #38BDF8, var(--color-primary));
  z-index: 9999;
  width: 0%;
  transition: width 0.1s linear;
  box-shadow: 0 0 10px rgba(14, 165, 233, 0.4);
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: all 0.4s var(--ease-out);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--border-color);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 1px;
  transition: transform 0.3s var(--ease-spring);
}

.nav-logo:hover {
  transform: scale(1.03);
}

.nav-logo-mark {
  width: 60px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s var(--ease-spring);
}

.nav-logo:hover .nav-logo-mark {
  transform: rotate(8deg) scale(1.1);
}

.nav-logo-mark svg {
  width: 100%;
  height: 100%;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-text span:first-child {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo-text span:last-child {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  font-size: 15px;
  font-weight: 400;
  color: var(--text-secondary);
  transition: all 0.3s var(--ease-out);
  position: relative;
  padding: 8px 16px;
  border-radius: 8px;
}

.nav-links a:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  font-weight: 500;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px 14px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all 0.3s var(--ease-out);
  background: transparent;
}

.lang-switch:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
  transform: translateY(-1px);
}

.lang-switch .lang-active {
  color: var(--color-primary);
  font-weight: 500;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s var(--ease-out);
  border-radius: 2px;
}

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

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

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

/* ===== Hero 区 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-height);
  background: linear-gradient(180deg, #F0F9FF 0%, #FFFFFF 60%);
}

/* 背景装饰粒子 */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
}

.hero-particle {
  position: absolute;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.15;
  animation: float 8s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) translateX(0); }
  50% { transform: translateY(-30px) translateX(15px); }
}

.hero-banner {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  transform: scale(1.05);
}

.banner-slide.active {
  opacity: 1;
  transform: scale(1);
  transition: opacity 0.8s ease-in-out, transform 6s ease-out;
}

.banner-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.88) 0%, rgba(240, 249, 255, 0.7) 40%, rgba(255, 255, 255, 0.45) 100%);
}

/* 左右切换箭头 */
.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  transition: all 0.3s var(--ease-out);
  opacity: 0;
}

.hero:hover .banner-arrow {
  opacity: 1;
}

.banner-arrow:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
}

.banner-prev { left: 24px; }
.banner-next { right: 24px; }

/* 底部圆点指示器 */
.banner-dots {
  position: absolute;
  bottom: 120px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.banner-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.2);
  border: none;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  padding: 0;
}

.banner-dot:hover {
  background: rgba(14, 165, 233, 0.5);
}

.banner-dot.active {
  background: var(--color-primary);
  width: 28px;
  border-radius: 5px;
  box-shadow: 0 0 8px rgba(14, 165, 233, 0.4);
}

/* 右下角向下滚动箭头 */
.scroll-down {
  position: absolute;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
  animation: scrollBounce 2s ease-in-out infinite;
  transition: all 0.3s var(--ease-out);
}

.scroll-down:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.4);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
  transition: transform 0.3s ease-out;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 28px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s var(--ease-out) 0.2s forwards;
}

.hero-eyebrow::before {
  content: '';
  width: 32px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: lineGrow 1s var(--ease-out) 0.5s forwards;
  transform-origin: left;
  transform: scaleX(0);
}

@keyframes lineGrow {
  to { transform: scaleX(1); }
}

.hero-title {
  font-size: clamp(40px, 6vw, 68px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 24px;
  max-width: 620px;
  max-width: 600px;
}

.hero-title .line {
  display: block;
  overflow: hidden;
}

.hero-title .line span {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%);
  animation: slideUp 0.9s var(--ease-out) forwards;
}

.hero-title .line:nth-child(1) span { animation-delay: 0.35s; }
.hero-title .line:nth-child(2) span { animation-delay: 0.5s; }

@keyframes slideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title .highlight {
  color: var(--color-primary);
  position: relative;
  display: inline-block;
}

.hero-title .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--color-primary-light);
  z-index: -1;
  border-radius: 4px;
  transform: scaleX(0);
  transform-origin: left;
  animation: highlightGrow 0.8s var(--ease-out) 1.2s forwards;
}

@keyframes highlightGrow {
  to { transform: scaleX(1); }
}

.hero-subtitle {
  font-size: clamp(18px, 2.5vw, 22px);
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 20px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s var(--ease-out) 0.7s forwards;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s var(--ease-out) 0.85s forwards;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s var(--ease-out) 1s forwards;
}

/* 按钮光扫效果 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.4s var(--ease-out);
  border: none;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.6s var(--ease-out);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.25);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
  transform: translateY(-3px);
}

.btn-primary:active {
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn-outline:active {
  transform: translateY(-1px);
}

.hero-stats {
  position: absolute;
  bottom: 60px;
  left: 0;
  right: 0;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s var(--ease-out) 1.2s forwards;
}

.hero-stat {
  border-left: 3px solid var(--color-primary);
  padding-left: 16px;
  transition: transform 0.3s var(--ease-out);
}

.hero-stat:hover {
  transform: translateX(6px);
}

.hero-stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 滚动提示 */
.scroll-hint {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 1.5s forwards;
}

.scroll-hint span {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 2px;
}

.scroll-hint .mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.scroll-hint .mouse::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: scrollWheel 1.8s ease-in-out infinite;
}

@keyframes scrollWheel {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50% { transform: translateX(-50%) translateY(10px); opacity: 0.3; }
}

/* ===== 通用区块样式 ===== */
.section {
  padding: 120px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* ===== 关于我们 ===== */
.about {
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.about::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-content h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.3;
}

.about-content p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 40px;
}

.about-feature {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  transition: all 0.4s var(--ease-out);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.about-feature::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}

.about-feature:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.about-feature:hover::before {
  transform: scaleX(1);
}

.about-feature-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  transition: all 0.4s var(--ease-spring);
}

.about-feature:hover .about-feature-icon {
  transform: scale(1.1) rotate(-5deg);
  background: var(--color-primary);
  color: #fff;
}

.about-feature-icon svg {
  width: 100%;
  height: 100%;
}

.about-feature h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  transition: color 0.3s ease;
}

.about-feature:hover h4 {
  color: var(--color-primary);
}

.about-feature p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

.about-visual {
  position: relative;
  perspective: 1000px;
}

.about-visual img {
  width: 100%;
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  transition: transform 0.6s var(--ease-out), box-shadow 0.6s var(--ease-out);
}

.about-visual:hover img {
  transform: scale(1.02) rotateY(-2deg);
  box-shadow: var(--shadow-xl);
}

.about-visual::before {
  content: '';
  position: absolute;
  inset: -16px;
  border: 2px solid var(--color-primary-dim);
  border-radius: 24px;
  z-index: -1;
  transition: all 0.5s var(--ease-out);
}

.about-visual:hover::before {
  inset: -24px;
  border-color: var(--color-primary);
  opacity: 0.3;
}

.about-milestones {
  display: flex;
  gap: 48px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.milestone {
  flex: 1;
  transition: transform 0.3s var(--ease-out);
}

.milestone:hover {
  transform: translateY(-4px);
}

.milestone-year {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.milestone-text {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== 产品技术 ===== */
.products {
  background: var(--bg-primary);
}

.product-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 100px;
}

.product-image {
  position: relative;
  padding: 48px;
  background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
  border-radius: 24px;
  overflow: hidden;
  transition: all 0.5s var(--ease-out);
}

.product-image::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, transparent, rgba(14,165,233,0.1), transparent 30%);
  animation: rotate 8s linear infinite;
}

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

.product-image:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-image img {
  width: 100%;
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 1;
  transition: transform 0.5s var(--ease-out);
}

.product-image:hover img {
  transform: scale(1.03);
}

.product-info h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.product-info > p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
}

.product-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.product-spec {
  padding: 22px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  transition: all 0.4s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.product-spec::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform 0.4s var(--ease-out);
}

.product-spec:hover {
  border-color: var(--color-primary);
  background: var(--bg-card);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-spec:hover::after {
  transform: scaleX(1);
}

.product-spec-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
  transition: transform 0.3s var(--ease-spring);
}

.product-spec:hover .product-spec-value {
  transform: scale(1.08);
}

.product-spec-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* 技术路线 */
.tech-section {
  margin-bottom: 100px;
}

.tech-tabs {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 48px;
  border-bottom: 2px solid var(--border-color);
  position: relative;
}

.tech-tab {
  padding: 16px 40px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  transition: color 0.3s ease;
  font-family: inherit;
  z-index: 1;
}

.tech-tab.active {
  color: var(--color-primary);
}

.tech-tab-indicator {
  position: absolute;
  bottom: -2px;
  height: 2px;
  background: var(--color-primary);
  transition: all 0.4s var(--ease-spring);
  z-index: 2;
}

.tech-content {
  display: none;
  animation: fadeInSlide 0.6s var(--ease-out);
}

.tech-content.active {
  display: block;
}

@keyframes fadeInSlide {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tech-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.tech-text h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.tech-text p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.tech-flow {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.tech-flow-step {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.3s var(--ease-out);
}

.tech-flow-step:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  transform: translateX(8px);
}

.tech-flow-num {
  width: 34px;
  height: 34px;
  min-width: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 14px;
  border-radius: 50%;
  transition: transform 0.3s var(--ease-spring);
}

.tech-flow-step:hover .tech-flow-num {
  transform: scale(1.15) rotate(360deg);
}

.tech-flow-text {
  font-size: 14px;
  color: var(--text-secondary);
}

.tech-advantages {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tech-advantage {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  transition: all 0.4s var(--ease-out);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.tech-advantage::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s var(--ease-out);
}

.tech-advantage:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateX(10px);
}

.tech-advantage:hover::before {
  transform: scaleY(1);
}

.tech-advantage h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  transition: color 0.3s ease;
}

.tech-advantage:hover h4 {
  color: var(--color-primary);
}

.tech-advantage p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

/* 应用领域 */
.applications {
  text-align: center;
}

.applications-image {
  margin: 48px 0;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all 0.5s var(--ease-out);
}

.applications-image:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow-xl);
}

.applications-image img {
  width: 100%;
  transition: transform 0.8s var(--ease-out);
}

.applications-image:hover img {
  transform: scale(1.05);
}

.app-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
  text-align: left;
}

.app-card {
  padding: 36px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  transition: all 0.5s var(--ease-out);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transform-style: preserve-3d;
  perspective: 1000px;
}

.app-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), #38BDF8);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease-out);
}

.app-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-xl);
  transform: translateY(-10px);
}

.app-card:hover::before {
  transform: scaleX(1);
}

.app-card-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 24px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  transition: all 0.5s var(--ease-spring);
}

.app-card:hover .app-card-icon {
  transform: scale(1.15) rotate(-8deg);
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.3);
}

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

.app-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  transition: color 0.3s ease;
}

.app-card:hover h3 {
  color: var(--color-primary);
}

.app-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.app-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.app-card-tag {
  font-size: 12px;
  padding: 5px 12px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 20px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.app-card:hover .app-card-tag {
  background: var(--color-primary);
  color: #fff;
}

/* ===== 新闻活动 ===== */
.news {
  background: var(--bg-secondary);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  overflow: hidden;
  transition: all 0.5s var(--ease-out);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transform-style: preserve-3d;
}

.news-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.news-card-image {
  height: 180px;
  background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(14,165,233,0.1) 100%);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.news-card:hover .news-card-image::after {
  opacity: 1;
}

.news-card-icon {
  width: 56px;
  height: 56px;
  color: var(--color-primary);
  opacity: 0.7;
  position: relative;
  z-index: 1;
  transition: all 0.5s var(--ease-spring);
}

.news-card:hover .news-card-icon {
  opacity: 1;
  transform: scale(1.2) rotate(10deg);
}

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

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.news-card-date {
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 500;
}

.news-card-category {
  font-size: 12px;
  padding: 4px 10px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 6px;
  font-weight: 500;
}

.news-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.5;
  transition: color 0.3s ease;
}

.news-card:hover h3 {
  color: var(--color-primary);
}

.news-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-more {
  text-align: center;
  margin-top: 56px;
}

/* ===== 人才招聘 ===== */
.careers {
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.careers::before {
  content: '';
  position: absolute;
  bottom: -300px;
  left: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.careers-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 80px;
}

.careers-text h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.careers-text p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.8;
}

.careers-benefits {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.careers-benefit {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.3s var(--ease-out);
}

.careers-benefit:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  transform: translateY(-3px);
}

.careers-benefit-icon {
  width: 22px;
  height: 22px;
  min-width: 22px;
  color: var(--color-primary);
  margin-top: 2px;
  transition: transform 0.3s var(--ease-spring);
}

.careers-benefit:hover .careers-benefit-icon {
  transform: scale(1.2);
}

.careers-benefit span {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.careers-visual {
  padding: 56px 48px;
  background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
  border-radius: 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  transition: all 0.5s var(--ease-out);
}

.careers-visual:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.careers-visual::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(14,165,233,0.1) 0%, transparent 60%);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.2); opacity: 0.8; }
}

.careers-visual-num {
  font-size: 80px;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  animation: numFloat 3s ease-in-out infinite;
}

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

.careers-visual-label {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-weight: 600;
  position: relative;
  z-index: 1;
}

.careers-visual-desc {
  font-size: 14px;
  color: var(--text-secondary);
  position: relative;
  z-index: 1;
}

/* 岗位列表 */
.jobs-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.job-item {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 28px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: all 0.4s var(--ease-out);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.job-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-primary);
  transform: scaleY(0);
  transition: transform 0.4s var(--ease-out);
}

.job-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateX(10px);
}

.job-item:hover::before {
  transform: scaleY(1);
}

.job-title h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  transition: color 0.3s ease;
}

.job-item:hover .job-title h4 {
  color: var(--color-primary);
}

.job-title p {
  font-size: 13px;
  color: var(--text-muted);
}

.job-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.job-meta svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.job-salary {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
  transition: transform 0.3s var(--ease-spring);
}

.job-item:hover .job-salary {
  transform: scale(1.1);
}

.job-apply {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
  white-space: nowrap;
}

.job-apply svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s var(--ease-spring);
}

.job-item:hover .job-apply svg {
  transform: translateX(6px);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 80px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 20px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-primary);
  position: relative;
  padding-bottom: 12px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-muted);
  transition: all 0.3s ease;
  display: inline-block;
}

.footer-col a:hover {
  color: var(--color-primary);
  transform: translateX(4px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.6;
  transition: color 0.3s ease;
}

.footer-contact-item:hover {
  color: var(--color-primary);
}

.footer-contact-item svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.footer-bottom-links a:hover {
  color: var(--color-primary);
}

/* ===== 回到顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
  transition: all 0.4s var(--ease-out);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

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

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.4);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .about-grid,
  .product-hero,
  .tech-detail,
  .careers-intro {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .banner-arrow {
    display: none;
  }

  .banner-dots {
    bottom: 140px;
  }

  .scroll-down {
    bottom: 20px;
    right: 20px;
    width: 38px;
    height: 38px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    position: relative;
    bottom: auto;
    margin-top: 60px;
  }

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

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

  .job-item {
    grid-template-columns: 1fr 1fr;
  }

  .job-apply {
    grid-column: 1 / -1;
    justify-content: flex-end;
  }

  .scroll-hint {
    display: none;
  }
}

@media (max-width: 768px) {
  .container,
  .nav-inner,
  .hero-content {
    padding: 0 20px;
  }

  .section {
    padding: 80px 0;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
    animation: slideDown 0.3s var(--ease-out);
  }

  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .nav-links a {
    padding: 12px 16px;
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  .lang-switch {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

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

  .about-features,
  .product-specs,
  .careers-benefits {
    grid-template-columns: 1fr;
  }

  .app-cards,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .tech-tabs {
    flex-wrap: wrap;
  }

  .tech-tab {
    padding: 12px 20px;
    font-size: 14px;
  }

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

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

  .job-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .job-apply {
    justify-content: flex-start;
  }

  .about-milestones {
    flex-direction: column;
    gap: 24px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

/* ===== 滚动揭示动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.lang-switch[aria-disabled="true"] { cursor: default; }
.detail-richtext img { height: auto; margin: 24px auto; }
.empty-state { padding: 72px 24px; text-align: center; color: var(--text-muted); }
.about-copy > :first-child { margin-top: 0; }
.about-copy > :last-child { margin-bottom: 0; }
.product-info h2 a,
.news-card > a,
.job-item,
.footer-contact-item a { color: inherit; text-decoration: none; }
.news-card > a { display: block; height: 100%; }
.news-card-image img { width: 100%; height: 100%; object-fit: cover; }
.footer-bottom-links span { font-size: 13px; color: var(--text-muted); }