/* ==========================================================================
   Global & Reset Styles 
   ========================================================================== */

@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%;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: #0b0a0a; /* 与原图一致的深邃黑背景 */
  color: #ffffff;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
}

/* ==========================================================================
   Header & Navigation Bar
   ========================================================================== */
header {
  display: block;
  background-color: #000000;
  border-bottom: 1px solid #1a1a1a;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: table;
  width: 100%;
}

.logo {
  display: table-cell;
  vertical-align: middle;
  font-size: 24px;
  font-weight: bold;
  color: #ffffff;
}

.nav-links {
  display: table-cell;
  vertical-align: middle;
  text-align: right;
}

.nav-links a {
  color: #cccccc;
  text-decoration: none;
  margin-left: 25px;
  font-size: 15px;
  transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #ffffff;
}

.cta-btn {
  background-color: #ffffff;
  color: #000000;
  padding: 8px 20px;
  border-radius: 20px;
  font-weight: bold;
  text-decoration: none;
  margin-left: 25px;
  display: inline-block;
}

/* ==========================================================================
   Hero Banner Section (大标题区域)
   ========================================================================== */
.hero-banner {
  background-color: #2c2e35; /* 与原图 Contact Us 一致的灰色圆角框 */
  text-align: center;
  padding: 150px 20px;
  border-radius: 16px;
  min-height: 300px;
}

.hero-banner h1 {
  font-family: var(--font-heading);
  font-size: 58px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: #ffffff;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   Main Content Section 
   ========================================================================== */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 20px;
  text-align: center;
}

.sub-tag {
  background-color: #1a1a1a;
  border: 1px solid #333;
  color: #ffffff;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  display: inline-block;
  margin-bottom: 20px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.section-desc {
  color: #aaaaaa;
  max-width: 700px;
  margin: 0 auto 50px auto;
  font-size: 16px;
}

/* ==========================================================================
   Info Grid Cards (企业使命/专长卡片区)
   ========================================================================== */
.info-grid {
  display: table;
  width: 100%;
  table-layout: fixed;
  border-spacing: 20px 0;
  margin-bottom: 60px;
  margin-top: 50px;
}

.info-card {
  display: table-cell;
  background-color: #353535; /* 完美还原原图的古铜金/棕色卡片背景色 */
  padding: 30px;
  border-radius: 12px;
  text-align: left;
  vertical-align: top;
}

.info-card h3 {
  margin-top: 0;
  color: #ffffff;
  font-size: 20px;
  margin-bottom: 15px;
}

.info-card p {
  color: #e0dcd3;
  font-size: 14px;
  margin: 0;
  line-height: 1.6;
}

/* ==========================================================================
   Footer Section (页脚区域，完全对齐原图数据)
   ========================================================================== */
footer {
  background-color: #000000;
  border-top: 1px solid #1a1a1a;
  padding: 50px 40px 20px 40px;
  margin-top: 80px;
}

.footer-grid {
  display: table;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  table-layout: fixed;
}

.footer-col {
  display: table-cell;
  vertical-align: top;
  padding-right: 20px;
}

.footer-col h4 {
  font-size: 18px;
  margin-top: 0;
  margin-bottom: 20px;
  color: #ffffff;
}

.footer-col p,
.footer-col a {
  color: #aaaaaa;
  font-size: 14px;
  text-decoration: none;
  display: block;
  margin-bottom: 10px;
}

.footer-col a:hover {
  color: #ffffff;
}

.copyright {
  text-align: center;
  border-top: 1px solid #1a1a1a;
  margin-top: 40px;
  padding-top: 20px;
  font-size: 12px;
  color: #666666;
}

.about-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-top.jpg");

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