@import url("https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600&display=swap");

:root {
  --bg-dark: #0f0e0e;
  --bg-card: #161515;
  --text-main: #ffffff;
  --text-muted: #9fa0a0;
  --border-color: rgba(255, 255, 255, 0.08);

  /* C字母完美呈现正圆的几何现代字体 */
  --font-heading: "Montserrat", sans-serif;
  --font-body: "Plus Jakarta Sans", sans-serif;

  --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  /* 针对 Archnet 品牌色微调的经典古铜色系变量 */
  --color-accent: #95ff4f;
}

/* --- 全局重置 --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 限宽容器系统 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* --- 导航组件样式 --- */
.main-header {
  background-color: #000000;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition-smooth);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
}

.cta-btn {
  background-color: var(--text-main);
  color: var(--bg-dark) !important;
  padding: 8px 24px;
  border-radius: 24px;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.cta-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* --- 核心宣传（Hero）区域 --- */
.services-hero {
  padding: 80px 0 60px 0;
  text-align: center;
}

.tag-badge {
  display: inline-block;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 20px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

/* --- 服务网格（Grid）设计 --- */
.services-grid-section {
  padding: 40px 0 100px 0;
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: 16px;
  transition: var(--transition-smooth);
  cursor: pointer;
}

/* 引入贝塞尔曲线实现极度柔和的平滑上浮和边框变色 */
.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  background-color: #1a1919;
}

.card-icon {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.04);
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  margin-bottom: 28px;
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.service-card:hover .card-icon {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.card-text {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.6;
}

/* --- 页脚设计 --- */
.main-footer {
  background-color: #000000;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 12px;
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 12px;
  transition: var(--transition-smooth);
}

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

.copyright {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
  color: #555555;
}

/* 完美支持移动端响应式断点 */
@media (max-width: 768px) {
  .grid-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .hero-title {
    font-size: 32px;
  }
  .nav-links {
    display: none; /* 移动端可根据需要进一步拓展为汉堡包菜单 */
  }
}

.service-top {
  /* 核心：用 linear-gradient 叠一层 88% 不透明度的黑，留下 12% 的图片透明度 */
  background-image: linear-gradient(rgba(0, 0, 0, 0.48), rgba(0, 0, 0, 0.88)),
    url("./images/about.jpg");

  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}