/* ===== 全局变量 ===== */
:root {
  /* 品牌色 */
  --color-primary: #2563EB;
  --color-primary-dark: #1E40AF;
  --color-primary-light: #3B82F6;
  --color-accent: #F59E0B;
  --color-accent-dark: #D97706;

  /* 业务色 */
  --color-cloud: #3B82F6;
  --color-edge: #10B981;
  --color-cdn: #F59E0B;
  --color-security: #EF4444;
  --color-ai: #8B5CF6;

  /* 中性色 */
  --color-dark: #0F172A;
  --color-dark-2: #1E293B;
  --color-dark-3: #334155;
  --color-gray: #64748B;
  --color-gray-light: #94A3B8;
  --color-bg: #F8FAFC;
  --color-white: #FFFFFF;

  /* 渐变 */
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E1B4B 40%, #1E3A5F 100%);
  --gradient-blue: linear-gradient(135deg, #2563EB, #3B82F6);

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.16);

  /* 过渡 */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* 容器 */
  --container-max: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "PingFang SC", "Segoe UI", Roboto, sans-serif;
  color: var(--color-dark);
  background: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

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

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.95);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo-img {
  height: 60px;
  width: auto;
  padding: 4px;
  border-radius: 12px;
}

.nav-menu {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-link {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
  color: var(--color-accent);
}

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

.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: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.25) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.08) 0%, transparent 60%);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-particles .particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 100px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

.btn {
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: var(--gradient-blue);
  color: #fff;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.5);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.hero-stats {
  display: flex;
  gap: 48px;
  justify-content: center;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: #fff;
  line-height: 1;
  display: inline;
}

.stat-plus {
  display: inline;
  font-size: clamp(1rem, 2vw, 1.5rem);
  font-weight: 700;
  color: var(--color-accent);
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 8px;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.hero-scroll span {
  width: 4px;
  height: 8px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 2px;
  animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(12px); opacity: 0.3; }
}

/* ===== 通用 Section ===== */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-gray);
  max-width: 600px;
  margin: 0 auto;
}

.sub-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 32px;
  text-align: center;
}

/* ===== 关于我们 ===== */
.about {
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 80px;
}

.about-info-card {
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.info-row {
  display: flex;
  padding: 16px 0;
  border-bottom: 1px solid #F1F5F9;
}

.info-row:last-child {
  border-bottom: none;
}

.info-label {
  width: 120px;
  font-size: 0.9rem;
  color: var(--color-gray);
  font-weight: 500;
  flex-shrink: 0;
}

.info-value {
  font-size: 0.95rem;
  color: var(--color-dark);
  font-weight: 600;
}

.info-value.highlight {
  color: var(--color-primary);
}

.about-vision-card {
  background: var(--gradient-hero);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about-vision-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 30%, rgba(37, 99, 235, 0.3), transparent 60%);
}

.vision-icon {
  position: relative;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.about-vision-card h3 {
  position: relative;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.about-vision-card p {
  position: relative;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 24px;
}

.vision-tags {
  position: relative;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.tag {
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 100px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.9);
}

/* 优势卡片 */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-top: 3px solid var(--card-color);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: var(--card-color);
  opacity: 0.04;
  border-radius: 50%;
  transform: translate(40px, -40px);
  transition: var(--transition);
}

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

.advantage-card:hover::before {
  opacity: 0.08;
  transform: translate(20px, -20px) scale(1.2);
}

.adv-icon {
  color: var(--card-color);
  margin-bottom: 20px;
}

.advantage-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ===== 核心业务 ===== */
.business {
  background: #fff;
}

.business-block {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 1px solid #F1F5F9;
}

.business-block:last-child {
  border-bottom: none;
}

.business-block.reverse {
  grid-template-columns: 80px 1fr 1fr;
}

.business-block.reverse .business-content {
  order: 2;
}

.business-block.reverse .business-visual {
  order: 1;
}

.business-number {
  font-size: 3rem;
  font-weight: 800;
  color: #E2E8F0;
  line-height: 1;
  font-family: 'Arial', sans-serif;
}

.business-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  background: currentColor;
  margin-bottom: 12px;
}

.business-tag span {
  color: #fff;
}

.business-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.business-desc {
  font-size: 0.95rem;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 20px;
}

.business-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.business-features li {
  font-size: 0.9rem;
  color: var(--color-dark-3);
  display: flex;
  align-items: center;
  gap: 8px;
}

.check {
  color: var(--accent);
  font-weight: 700;
}

.business-block[style*="3B82F6"] .check { color: #3B82F6; }
.business-block[style*="10B981"] .check { color: #10B981; }
.business-block[style*="F59E0B"] .check { color: #F59E0B; }
.business-block[style*="EF4444"] .check { color: #EF4444; }
.business-block[style*="8B5CF6"] .check { color: #8B5CF6; }

.business-visual {
  display: flex;
  justify-content: center;
}

.visual-card {
  width: 200px;
  height: 200px;
  border-radius: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #fff;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.visual-card.blue { background: linear-gradient(135deg, #2563EB, #3B82F6); }
.visual-card.green { background: linear-gradient(135deg, #059669, #10B981); }
.visual-card.orange { background: linear-gradient(135deg, #D97706, #F59E0B); }
.visual-card.red { background: linear-gradient(135deg, #DC2626, #EF4444); }
.visual-card.purple { background: linear-gradient(135deg, #7C3AED, #8B5CF6); }

.visual-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.visual-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.visual-icon {
  position: relative;
  opacity: 0.9;
}

.visual-label {
  position: relative;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.visual-sublabel {
  position: relative;
  font-size: 0.8rem;
  opacity: 0.8;
}

/* ===== 技术架构 ===== */
.tech {
  background: var(--gradient-hero);
  color: #fff;
}

.tech .section-title,
.tech .sub-section-title {
  color: #fff;
}

.tech .section-desc {
  color: rgba(255, 255, 255, 0.7);
}

.tech .section-tag {
  color: var(--color-accent);
}

.tech-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 80px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.tech-layer {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 32px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tech-layer:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(8px);
}

.layer-number {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--layer-color);
  width: 48px;
  text-align: center;
  flex-shrink: 0;
}

.layer-content h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.layer-content p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.layer-bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--layer-color);
}

/* 算力部署 */
.tech-deployment {
  margin-bottom: 80px;
}

.deployment-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.deploy-card {
  flex: 1;
  min-width: 240px;
  max-width: 300px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.deploy-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
}

.deploy-icon {
  margin-bottom: 16px;
  display: flex;
  justify-content: center;
}

.deploy-icon.blue { color: #3B82F6; }
.deploy-icon.green { color: #10B981; }
.deploy-icon.orange { color: #F59E0B; }

.deploy-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}

.deploy-card p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

.deploy-arrow {
  color: rgba(255, 255, 255, 0.3);
  flex-shrink: 0;
}

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

.qual-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 28px;
  text-align: center;
  transition: var(--transition);
}

.qual-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

.qual-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.qual-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== 市场机遇 ===== */
.market {
  background: var(--color-bg);
}

.market-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.market-trend {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.market-trend:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.trend-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.market-trend h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.market-trend p {
  font-size: 0.9rem;
  color: var(--color-gray);
  line-height: 1.6;
}

.market-data {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.data-card {
  background: var(--gradient-hero);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.data-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(245, 158, 11, 0.15), transparent 60%);
}

.data-value {
  position: relative;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.data-value span {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
}

.data-label {
  position: relative;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 8px;
}

.data-source {
  position: relative;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
}

/* 应用场景 */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.usecase-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.uc-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.usecase-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.usecase-card p {
  font-size: 0.85rem;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ===== 发展历程 ===== */
.milestones {
  background: #fff;
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto 80px;
  padding: 0 20px;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, transparent, #E2E8F0 10%, #E2E8F0 90%, transparent);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 40px 48px 0;
  text-align: right;
}

.timeline-item.right {
  margin-left: 50%;
  padding: 0 0 48px 40px;
  text-align: left;
}

.timeline-dot {
  position: absolute;
  top: 8px;
  right: -8px;
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  border: 3px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.timeline-item.right .timeline-dot {
  left: -8px;
  right: auto;
}

.timeline-dot.highlight {
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
}

.timeline-date {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline-item.right .timeline-date {
  color: var(--color-accent);
}

.timeline-card {
  background: var(--color-bg);
  border-radius: 12px;
  padding: 20px 24px;
  transition: var(--transition);
}

.timeline-card:hover,
.timeline-card.highlight-card {
  background: #fff;
  box-shadow: var(--shadow-md);
}

.timeline-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.timeline-card p {
  font-size: 0.85rem;
  color: var(--color-gray);
  line-height: 1.5;
}

/* 三阶段战略 */
.strategy-section {
  margin-bottom: 80px;
}

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

.strategy-card {
  background: var(--color-bg);
  border-radius: 20px;
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.strategy-card:hover {
  background: #fff;
  box-shadow: var(--shadow-lg);
}

.strategy-card:nth-child(1) { border-top: 4px solid #3B82F6; }
.strategy-card:nth-child(2) { border-top: 4px solid #10B981; }
.strategy-card:nth-child(3) { border-top: 4px solid #F59E0B; }

.strategy-phase {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-gray-light);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.strategy-time {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 16px;
}

.strategy-card h4 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.strategy-card p {
  font-size: 0.9rem;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 20px;
}

.strategy-keyword {
  display: inline-block;
  padding: 6px 20px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
}

.strategy-card:nth-child(2) .strategy-keyword { background: #10B981; }
.strategy-card:nth-child(3) .strategy-keyword { background: #F59E0B; }

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

.moat-card {
  background: var(--gradient-hero);
  border-radius: 16px;
  padding: 32px;
  color: #fff;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.moat-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 50%;
  transform: translate(30px, -30px);
}

.moat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.3);
}

.moat-layer {
  position: relative;
  display: inline-block;
  padding: 4px 12px;
  background: rgba(245, 158, 11, 0.2);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.moat-card h4 {
  position: relative;
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.moat-card p {
  position: relative;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* ===== 联系我们 ===== */
.contact {
  background: var(--color-bg);
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.contact-item:hover {
  box-shadow: var(--shadow-md);
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.8rem;
  color: var(--color-gray);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 0.9rem;
  color: var(--color-dark);
  font-weight: 600;
  line-height: 1.5;
}

.contact-cta {
  background: var(--gradient-hero);
  border-radius: 20px;
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.contact-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(245, 158, 11, 0.15), transparent 50%);
}

.cta-content {
  position: relative;
  text-align: center;
}

.cta-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  margin-bottom: 24px;
}

.cta-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.cta-tag {
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 100px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.9);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: 64px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 64px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.footer-brand {
  flex: 0 0 300px;
}

.footer-logo {
  height: 40px;
  width: auto;
  padding: 4px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.footer-slogan {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-links {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}

.footer-col h5 {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  padding: 4px 0;
  transition: var(--transition);
}

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

.footer-qrcodes {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-qrcode {
  text-align: center;
  max-width: 140px;
  flex-shrink: 0;
}

.footer-qrcode img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  margin-bottom: 8px;
  background: #fff;
  padding: 4px;
}

.footer-qrcode p {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== 滚动动画 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .advantage-grid,
  .market-grid,
  .usecase-grid,
  .moat-grid,
  .strategy-grid,
  .qual-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .business-block,
  .business-block.reverse {
    grid-template-columns: 60px 1fr;
  }

  .business-visual {
    display: none;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    display: block;
    padding: 12px 16px;
  }

  .section {
    padding: 64px 0;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-item {
    min-width: 120px;
  }

  .advantage-grid,
  .market-grid,
  .usecase-grid,
  .moat-grid,
  .strategy-grid,
  .qual-grid {
    grid-template-columns: 1fr;
  }

  .market-data {
    grid-template-columns: 1fr;
  }

  .timeline-line {
    left: 20px;
  }

  .timeline-item,
  .timeline-item.right {
    width: 100%;
    margin-left: 0;
    padding: 0 0 32px 48px;
    text-align: left;
  }

  .timeline-dot,
  .timeline-item.right .timeline-dot {
    left: 12px;
    right: auto;
  }

  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-brand {
    flex: none;
  }

  .footer-links {
    gap: 32px;
  }

  .deployment-grid {
    flex-direction: column;
  }

  .deploy-arrow {
    transform: rotate(90deg);
  }

  .contact-cta {
    padding: 32px 24px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .business-block,
  .business-block.reverse {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .business-number {
    font-size: 2rem;
  }

  .contact-item {
    flex-direction: column;
    gap: 12px;
  }
}