@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&family=Space+Grotesk:wght@400;600&display=swap');

:root {
  --bg-color: #08080c;
  --bg-gradient: radial-gradient(circle at 50% 50%, #12121a 0%, #08080c 100%);
  --panel-bg: rgba(13, 13, 17, 0.7);
  --panel-border: rgba(204, 255, 0, 0.08);
  --panel-border-hover: rgba(204, 255, 0, 0.25);
  
  --accent-color: #ccff00;
  --accent-glow: rgba(204, 255, 0, 0.4);
  --accent-glow-strong: rgba(204, 255, 0, 0.8);
  
  --text-pure: #ffffff;
  --text-main: #e2e2e9;
  --text-muted: #8a8a93;
  --text-dark: #4c4c52;
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: 'Space Grotesk', monospace;
  
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

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

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: #08080c;
}
::-webkit-scrollbar-thumb {
  background: #22222a;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* 科技感发光背景网格 */
.grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(204, 255, 0, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(204, 255, 0, 0.02) 1px, transparent 1px);
  background-size: 50px 50px;
  background-position: center center;
  pointer-events: none;
  z-index: 1;
}

/* 炫酷流光 Canvas */
#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* 容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* 导航栏 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(8, 8, 12, 0.85);
  border-bottom: 1px solid var(--panel-border);
  height: 70px;
}

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

.logo {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 800;
  color: var(--text-pure);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  color: var(--accent-color);
  text-shadow: 0 0 10px var(--accent-glow);
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-pure);
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.cta-button {
  background: transparent;
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 10px var(--panel-border);
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(204, 255, 0, 0.2), transparent);
  transition: 0.5s;
}

.cta-button:hover::before {
  left: 100%;
}

.cta-button:hover {
  background: var(--accent-color);
  color: #000000;
  box-shadow: 0 0 15px var(--accent-glow-strong);
  transform: translateY(-2px);
}

/* Hero 首屏 */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(204, 255, 0, 0.05);
  border: 1px solid var(--panel-border);
  padding: 6px 14px;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-color);
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 0 10px rgba(204, 255, 0, 0.02);
}

.hero-tag::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent-color);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-glow-strong);
  animation: blink 1.5s infinite alternate;
}

@keyframes blink {
  0% { opacity: 0.3; }
  100% { opacity: 1; }
}

.hero-title {
  font-size: 56px;
  line-height: 1.1;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-title span {
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.btn-primary {
  background: var(--accent-color);
  color: #000;
  border: none;
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--accent-glow-strong);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-pure);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* 模块标题 */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  margin-bottom: 60px;
  max-width: 600px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-pure);
}

/* 技术架构可视化 */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.arch-card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 32px 24px;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
}

.arch-card:hover {
  border-color: var(--panel-border-hover);
  box-shadow: 0 0 25px rgba(204, 255, 0, 0.05);
  transform: translateY(-5px);
}

.arch-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-color);
  transition: var(--transition);
}

.arch-card:hover::after {
  width: 100%;
}

.arch-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-color);
  margin-bottom: 24px;
  display: block;
  font-weight: 600;
}

.arch-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-pure);
  margin-bottom: 12px;
}

.arch-desc {
  font-size: 14px;
  color: var(--text-muted);
}

/* 连接线动效 (简易数据流) */
.arch-flow-line {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(204, 255, 0, 0.2), transparent);
  z-index: 1;
  pointer-events: none;
}

/* 案例展示墙 */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.case-card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.case-card:hover {
  border-color: var(--panel-border-hover);
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4), 0 0 15px rgba(204, 255, 0, 0.05);
}

.case-img-placeholder {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, #101018 0%, #1e1e2d 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-dark);
  position: relative;
}

.case-img-placeholder::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, transparent 40%, rgba(8, 8, 12, 0.8) 100%);
}

.case-card:hover .case-img-placeholder::after {
  background: radial-gradient(circle at center, transparent 30%, rgba(8, 8, 12, 0.4) 100%);
}

.case-info {
  padding: 24px;
}

.case-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  background: rgba(255, 255, 255, 0.03);
  padding: 4px 8px;
  border-radius: 2px;
  color: var(--accent-color);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.case-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-pure);
  margin-top: 12px;
  margin-bottom: 8px;
}

.case-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* 留资表单 */
.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 48px;
  border-radius: 12px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.form-group {
  margin-bottom: 24px;
  position: relative;
}

.form-label {
  display: block;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.form-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-pure);
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 15px;
  border-radius: 4px;
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--accent-color);
  background: rgba(204, 255, 0, 0.02);
  box-shadow: 0 0 15px rgba(204, 255, 0, 0.15);
}

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

.form-submit {
  width: 100%;
  background: var(--accent-color);
  color: #000;
  border: none;
  padding: 14px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 15px var(--accent-glow);
}

.form-submit:hover {
  box-shadow: 0 0 25px var(--accent-glow-strong);
  transform: translateY(-1px);
}

.form-submit:disabled {
  background: var(--text-dark);
  color: var(--text-muted);
  box-shadow: none;
  cursor: not-allowed;
}

.form-message {
  margin-top: 16px;
  padding: 12px;
  border-radius: 4px;
  font-size: 14px;
  text-align: center;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(204, 255, 0, 0.1);
  color: var(--accent-color);
  border: 1px solid rgba(204, 255, 0, 0.2);
}

.form-message.error {
  display: block;
  background: rgba(255, 69, 58, 0.1);
  color: #ff453a;
  border: 1px solid rgba(255, 69, 58, 0.2);
}

/* 城市解决方案页面布局 */
.solution-layout {
  padding-top: 140px;
}

.solution-meta {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.solution-article {
  max-width: 800px;
  margin: 0 auto;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 60px;
  border-radius: 12px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* Markdown 文章内容排版 */
.article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
}

.article-body h1, .article-body h2, .article-body h3 {
  color: var(--text-pure);
  margin-top: 40px;
  margin-bottom: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.article-body h1 { font-size: 32px; border-bottom: 1px solid rgba(255,255,255,0.05); padding-bottom: 10px; }
.article-body h2 { font-size: 24px; border-left: 3px solid var(--accent-color); padding-left: 12px; }
.article-body h3 { font-size: 18px; }

.article-body p {
  margin-bottom: 24px;
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 20px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  border-left: 3px solid var(--accent-color);
  background: rgba(204, 255, 0, 0.02);
  padding: 16px 24px;
  margin: 24px 0;
  border-radius: 0 4px 4px 0;
  color: var(--text-silver);
  font-style: italic;
}

.article-body code {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent-color);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}

.article-body pre {
  background: #050508;
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 20px;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 24px;
}

.article-body pre code {
  background: transparent;
  color: var(--text-main);
  padding: 0;
  border-radius: 0;
  font-size: 13px;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}

.article-body th, .article-body td {
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 12px;
  text-align: left;
}

.article-body th {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-pure);
  font-weight: 600;
}

/* 城市列表区块 */
.solutions-list-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 40px;
}

.solution-link-card {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid rgba(255, 255, 255, 0.03);
  padding: 16px;
  border-radius: 6px;
  text-align: center;
  font-size: 14px;
  transition: var(--transition);
}

.solution-link-card:hover {
  background: rgba(204, 255, 0, 0.02);
  border-color: var(--panel-border-hover);
  color: var(--accent-color);
  transform: translateY(-2px);
}

/* 页脚 */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding: 60px 0;
  margin-top: 100px;
  background: #050508;
}

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

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-info p {
  font-size: 14px;
  color: var(--text-muted);
}

.footer-copyright {
  font-size: 12px;
  color: var(--text-dark);
  font-family: var(--font-mono);
}

/* 404 页面设计 */
.error-page {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 120px;
  font-weight: 800;
  line-height: 1;
  color: var(--accent-color);
  text-shadow: 0 0 30px var(--accent-glow);
  margin-bottom: 24px;
}

.error-title {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-pure);
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 400px;
}

/* 响应式适配 */
@media (max-width: 1024px) {
  .arch-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 40px;
  }
  .arch-grid, .case-grid {
    grid-template-columns: 1fr;
  }
  .header-container {
    padding: 0;
  }
  .nav-links {
    display: none; /* 为简化，移动端先隐藏导航链接，保留 Logo 和 CTA */
  }
  .form-container, .solution-article {
    padding: 24px;
  }
  .solutions-list-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}