/* =========================================
   1. 基础重置与全局变量
   ========================================= */
:root {
  --bg-color: #ffffff;
  --bg-card: #f3f3f3;
  --bg-card2: #fafafa;
  --text-primary: #000000;
  --text-secondary: #4b5563;
  --text-muted: #cacaca;
  --text-one: #ffffff;
  --text-two: #a0a0a0;
  --nav-bg: rgba(255, 255, 255, 0.60);
  --gradient-primary: linear-gradient(90deg, #006205 0%, #90af04 100%);
  --transition-speed: 0.3s;
}

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

html { scroll-behavior: smooth; }
body {
  font-family: 'Manrope', sans-serif;
  background-color: linear-gradient(180deg, var(--bg-color, #FFF) 0%, var(--bg-card, #F3F3F3) 100%);
  color: var(--text-primary);
}

/* =========================================
   2. 导航栏 (Navbar)
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 12px 80px;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-logo { display: flex; align-items: center; max-width: 40px; }
.nav-logo img { max-width: 40px; aspect-ratio: 1 / 1; object-fit: contain; }

.nav-menu {
  display: inline-flex;
  align-items: center;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 24px; 
  box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.05) inset;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.nav-link {
  padding: 10px 24px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 999px;
  transition: all var(--transition-speed) ease;
}

.nav-link:hover { color: var(--text-primary); font-weight: 600;}

.nav-link.active {
  background: linear-gradient(180deg, #f8ffee 0%, #ffffff 100%);
  color: var(--text-primary);
  font-weight: 600;
  border-radius: 42px;
  box-shadow: -2px -2px 2px 0 rgba(168, 196, 238, 0.25) inset;
}

.nav-actions { display: flex; justify-content: flex-end; width: 200px; }

.btn-download {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px 10px 20px;
  background-color: var(--text-primary);
  color: var(--text-one);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 42px;
  transition: background-color var(--transition-speed) ease;
}

.btn-download-tablet {
  display: none;
}

.btn-download:hover { background-color: #333333; }

/* =========================================
   3. 首屏区域 (Hero Section)
   ========================================= */
.hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 86px;
  padding: 120px 80px 80px 80px;
  background-color: transparent;
  overflow: hidden;
}

.hero-visual {
  position: absolute;
  inset: 0; 
  z-index: 0;
  pointer-events: none; 
  width: 100%;
  height: 100%;
}

.hero-visual img { 
  display: block;
  width: 100%; 
  height: 100%; 
  /* 魔法属性：强制铺满整个容器，自动裁切不发生变形 */
  object-fit: cover; 
  /* 保证视觉中心（绿色砖块）始终在正中间 */
  object-position: center center; 
}

.hero-content {
  position: relative; 
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 360px; 
  width: 100%;
  padding: 80px 0 40px 0;
}

.hero-left { display: flex; flex-direction: column; align-items: flex-start; width: 100%; }

.hero-subtitle {
  display: inline-flex;
  align-items: flex-start; 
  gap: 8px;
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: -0.32px;
}

.subtitle-icon { display: inline-flex; align-items: center; justify-content: center; margin-top: 2px; }

.hero-title {
  color: var(--text-primary);
  font-size: 80px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -5.6px;
}

.hero-name {
  display: inline-block; 
  font-family: 'Playfair Display', serif;
  font-size: 80px;
  font-style: italic;
  font-weight: 500;
  letter-spacing: -5.6px;
  padding-right: 20px; 
  padding-left: 5px; 
  padding-bottom: 5px;
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-right { align-self: flex-end; max-width: 400px; text-align:right; }
.hero-description { color: var(--text-muted); font-size: 16px; letter-spacing: -0.32px; font-weight: 400; }

/* =========================================
   4. 关于我 (About Section)
   ========================================= */
.about-section {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  align-self: stretch;
  padding: 240px 80px 80px 80px;
  background-color: var(--text-primary);
  color: var(--bg-color);
  border-radius: 40px;
}

.about-tag {
  position: absolute;
  top: 80px;
  left: 80px;
  display: inline-flex;
  align-items: center; 
  gap: 4px;
  color: var(--text-muted);
  font-size: 16px;
}

.about-content { display: flex; flex-direction: column; align-items: center; gap: 20px; text-align: center; }
.about-title { color: var(--text-one); font-size: 64px; font-weight: 600; letter-spacing: -4.48px; }

.highlight-serif {
  display: inline-block;
  font-family: 'Playfair Display', serif;
  font-style: italic;
  padding-right: 24px;
  padding-left: 10px;
  margin-right: -10px;
  letter-spacing: normal; 
  line-height: normal; 
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  overflow: visible;
}

.about-description { color: var(--text-muted); font-size: 16px; letter-spacing: -0.32px; }

.btn-discover {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-size: 20px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 42px;
  transition: background-color var(--transition-speed) ease;
}

.btn-discover:hover { background-color: #e5e5e5; }

.about-stats {
  display: flex;
  align-items: flex-start;
  gap: 86px;
  align-self: stretch;
  margin-top: 100px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  flex: 1; 
  gap: 20px;
  max-width: 33%; 
  padding-left: 20px;
  border-left: 2px solid var(--text-muted);
}

.stat-number { font-size: 64px; font-weight: 600; }
.stat-label { color: var(--text-one); font-size: 18px; letter-spacing: -0.36px; }

/* =========================================
   5. 案例展示 (Case Studies Section)
   ========================================= */
.case-studies-section {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding: 80px 80px 100px 80px;
  background-color: transparent;
}

.section-header { display: flex; justify-content: space-between; align-items: center; }
.header-left { display: flex; flex-direction: column; align-items: flex-start; gap: 20px; }
.section-tag { display: inline-flex; align-items: center; gap: 8px; color: var(--text-two); font-size: 14px; letter-spacing: -0.28px; }
.section-title { color: var(--text-primary); font-size: 64px; font-weight: 600; letter-spacing: -4.48px; }
.section-subtitle { color: var(--text-two); font-size: 18px; letter-spacing: -0.36px; }
.header-right { display: flex; gap: 40px; }

.nav-arrow {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 72px;
  aspect-ratio: 1 / 1;
  background: linear-gradient(180deg, #F8FFEE 0%, #FFF 100%);
  color: var(--text-primary);
  border: none;
  border-radius: 50%;
  box-shadow: -3.273px -3.273px 3.273px 0 rgba(168, 196, 238, 0.25) inset;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
}

.nav-arrow:hover { background-color: #FAFAFA; }

/* 修改：默认隐藏所有卡片，只有带 active 的才显示 */
.project-card {
  display: none; 
  flex-direction: column;
  gap: 10px;
  background-color: var(--bg-color);
  border-radius: 20px;
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.05); 
  overflow: hidden;
}

/* 激活状态：使用 flex 布局并加入滑入淡出动画 */
.project-card.active {
  display: flex;
  animation: slideFadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* 丝滑的卡片切换动画 */
@keyframes slideFadeIn {
  0% { opacity: 0; transform: translateX(20px); }
  100% { opacity: 1; transform: translateX(0); }
}

.project-image { width: 100%; height: auto; overflow: hidden; }
.project-image img { display: block; width: 100%; height: auto; object-fit: cover; }

.project-info { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 10px 20px; }
.info-left { display: flex; flex-direction: column; gap: 12px; }
.project-title { color: var(--text-primary); font-size: 24px; font-weight: 600; letter-spacing: -0.48px; }
.project-meta, .project-date { color: var(--text-two); font-size: 18px; letter-spacing: -0.36px; }

.btn-read {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding:12px; 
  background-color: var(--text-primary);
  color: var(--text-one);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 42px;
  transition: background-color var(--transition-speed) ease;
}


.btn-read:hover { background-color: #333333; }

.carousel-pagination { display: flex; justify-content: center; align-items: center; gap: 4px; }
.dot { width: 6px; height: 6px; background-color: #e6e6e6; border-radius: 50%; cursor: pointer; transition: all var(--transition-speed) ease; }
.dot.active { width: 40px; height: 6px; background: var(--gradient-primary); border-radius: 8px; }

/* =========================================
   6. 游乐场/档案馆 (Playground Section)
   ========================================= */
.playground-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 120px 0 80px 0; 
  background-color: var(--text-primary);
  color: var(--bg-color);
  border-radius: 40px; 
  overflow: visible;
}

.playground-tag {
  position: absolute;
  top: 80px;
  left: 80px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  font-size: 14px;
  letter-spacing: -0.28px;
}

.playground-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 20px;
  margin-bottom: 40px;
}

.playground-title { color: var(--text-one); font-size: 64px; font-weight: 600; letter-spacing: -4.48px; }
.playground-subtitle { color: var(--text-muted); font-size: 16px; letter-spacing: -0.32px; }

/* 修改：移除之前的手动滚动属性，改为溢出隐藏 */
.playground-gallery {
  width: 100%;
  overflow: hidden;
  display: flex;
}

/* 新增：滚动轨道 */
.marquee-track {
  display: flex;
  gap: 20px;
  width: max-content;
  /* 魔法数字 1740px 的由来：3张卡片(3*560) + 3个间隙(3*20) = 1740px */
  /* 让它匀速(linear)向左滚动，并在刚好滚动完第一组的距离时，瞬间重置回 0 */
  animation: marqueeScroll 40s linear infinite; 
}

/* 新增：鼠标悬浮在画廊区域时，暂停滚动动画 */
.playground-gallery:hover .marquee-track {
  animation-play-state: paused !important; 
}

/* 修改：清理掉多余的 !important 和 scroll-snap */
.archive-card {
  flex: 0 0 560px; 
  width: 560px;
  height: 315px; 
  border-radius: 20px; 
  overflow: hidden; 
}

.archive-card img { 
  display: block; 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
}

.playground-btn { 
  margin-top: 40px; 
}

/* 核心动画规则：精确平移 1740px */
@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-3480px); }
}

/* =========================================
   7. 呼吁行动 (CTA Section)
   ========================================= */
.cta-section {
  padding: 120px 80px 100px 80px; /* 大量留白，使其更加突出 */
  background-color: transparent;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.cta-content {
  max-width: 900px; /* 限制宽度，使文字居中且易读 */
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px; /* 元素之间的间距 */
}

.cta-title {
  color: var(--text-primary);
  font-size: 64px; /* 64px 大标题 */
  font-weight: 600;
  letter-spacing: -4.48px;
}

/* 专门针对 CTA 里的 Challenge 的绿色斜体进行微调 */
.cta-challenge {
  padding-right: 12px;
}

.cta-subtitle {
  color: var(--text-primary); /* 使用muted颜色的小字 */
  font-size: 18px;
  line-height: 1.6;
  font-weight: 400;
}

.btn-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 20px;
  width: 210px;
  gap: 10px;
  background-color: var(--text-primary); /* 黑色背景 */
  color: var(--bg-color); /* 白色文字 */
  font-size: 20px; /* 20px 大字 */
  font-weight: 600;
  text-decoration: none;
  border-radius: 42px; /* 42px 大圆角 */
  transition: background-color var(--transition-speed) ease;
}

.btn-cta:hover {
  background-color: #333333; /* 悬浮时变浅 */
}

/* =========================================
   8. 页脚 (Footer Section)
   ========================================= */
.footer-section {
  display: flex;
  flex-direction: column;
  gap: 86px;
  background-color: var(--text-primary); 
  color: var(--bg-color); 
  padding: 120px 80px 40px 80px;
  border-radius: 40px 40px 0 0; 
  align-self: stretch;
  /* 将 Geist 字体提权至父容器，彻底消灭下方子元素的冗余声明 */
  font-family: 'Geist', sans-serif;
}

.footer-top {
  display: flex;
  width: 100%;
  justify-content: space-between;
  align-items: stretch;
}

.footer-brand { display: flex; flex-direction: column; justify-content: space-between; }
.footer-logo { max-width: 96px; max-height: 89px; object-fit: contain; }
.footer-slogan { font-size: 24px; font-weight: 400; color: var(--bg-color); text-transform: capitalize; }

.footer-links-container { display: flex; min-width: 363px; justify-content: space-between; align-items: flex-start; }
.footer-nav-col { display: flex; width: 168px; flex-direction: column; align-items: flex-start; gap: 31px; flex-shrink: 0; }
.footer-col-title { color: var(--bg-color); font-size: 24px; font-weight: 400; text-transform: capitalize; }

.footer-link {
  font-size: 18px;
  font-weight: 400;
  color: #E6E6E6;
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

.footer-link:hover { color: var(--bg-color); }

.footer-bottom { display: flex; align-items: flex-start; }
.copyright-text { font-size: 18px; color: var(--text-muted); font-weight: 400; }

.legal-link {
  font-size: 18px;
  color: #e4f2ff; 
  text-decoration: none;
  font-weight: 400;
  transition: opacity var(--transition-speed) ease;
}

.legal-link:hover { opacity: 0.7; }

/* =========================================
   修正：在桌面和 Tablet 端强制隐藏汉堡按钮
   ========================================= */
.btn-menu-mobile { 
  display: none; 
}




/* =========================================
   9. 响应式适配 (Tablet & Mobile)
   ========================================= */

/* -----------------------------------------
   [ Tablet 端适配 ] (屏幕宽度 <= 1024px)
   策略：缩减留白、 Gap 和文字大小，保持整体结构不变，优化 Stats
   ----------------------------------------- */
@media screen and (max-width: 1024px) {
  /* =========================================
   修正：在桌面和 Tablet 端强制隐藏汉堡按钮
   ========================================= */
.btn-menu-mobile { 
  display: none; 
}
  /* =========================================
     Navbar Tablet 端适配
     ========================================= */
  .navbar { padding: 12px 40px; }

  /* 魔法布局：让左右容器设置 flex: 1 均分两侧空间，这样中间的 nav-menu 就能绝对居中！ */
  .nav-logo { flex: 1; display: flex; align-items: center; max-width: none; }
  .nav-logo img { max-width: 40px; aspect-ratio: 1 / 1; object-fit: contain; }

  .nav-actions { flex: 1; display: flex; justify-content: flex-end; width: auto; }

  /* 隐藏桌面端带文字的按钮 */
  .btn-download {
    display: none;
  }

  /* 显示并美化 Tablet 端纯 Icon 按钮为正圆形 */
  .btn-download-tablet {
    display: flex;
    width: 44px; /* 宽高设为一致 */
    height: 44px;
    padding: 0; /* 去掉多余的左右内边距 */
    justify-content: center;
    align-items: center;
    background-color: var(--text-primary);
    color: var(--text-one);
    border-radius: 50%; /* 设置为 50% 变成完美的正圆 */
    transition: background-color var(--transition-speed) ease;
  }
  
  .btn-download-tablet:hover {
    background-color: #333333;
  }

  /* ... 后面保留你之前的关于 Hero, About 等其他区域的 tablet 适配代码 ... */

  .hero-section { padding: 120px 40px 80px 40px; }
  .about-section { padding: 200px 40px 80px 40px; }
  .case-studies-section { padding: 100px 40px 80px 40px; gap: 20px;}
  .blog-section { padding: 120px 40px 100px 40px; }
  .footer-section { padding: 120px 40px 40px 40px; }

  .playground-section { padding: 120px 0; }
  .playground-tag { left: 40px; }

  .hero-subtitle { gap: 0; }
  .hero-title, .hero-name { font-size: 64px; }
  .hero-name { padding-right: 12px; }
  .hero-right { max-width: 320px; }

  /* About 区域：缩减 Padding 和文字，stats 居中 */
  .about-tag { left: 40px; top: 40px; }
  .about-title { font-size: 48px; }
  .about-description { font-size: 16px; }
  .btn-discover { font-size: 18px; }
  .about-stats { justify-content: center; gap: 60px; margin-top: 60px; }
  .stat-item { padding-left: 15px; flex: none; width: auto; max-width: none; border-left: 2px solid var(--text-muted); }
  .stat-number { font-size: 40px; }

  /* Case Studies 区域：缩减文字和卡片 Padding */
  .section-tag { padding-bottom: 40px;}
  
  .project-image img { border-radius: 12px; } /* 卡片图片圆角缩小 */
  .project-info { gap: 10px; padding: 10px 20px 20px 20px; } /* 卡片信息区内边距缩小 */
  .project-title { font-size: 20px; }
  .project-meta, .project-date { font-size: 16px; }

  /* Playground 区域：缩小卡片并定义专属新动画 (重要！) */
  .playground-tag { top: 40px; left: 40px; }
  
  .archive-card { flex: 0 0 360px; width: 360px; height: 200px; }
  /* 魔法数字重新计算 (针对 Tablet)：3张卡片(3*360) + 3个间隙(3*10) = 1080 + 30 = 1110px */
  /* 修改前是 20s，现在改为 40s */
  .marquee-track { gap: 10px; animation: marqueeScrollTablet 40s linear infinite; }

  /* 重新计算：6张卡片(6*360) + 6个间隙(6*10) = 2160 + 60 = 2220px */
  @keyframes marqueeScrollTablet {
    0% { transform: translateX(0); }
    100% { transform: translateX(-2220px); }
  }
/* --- CTA 区域 (Tablet) --- */
  .cta-section { 
    padding: 100px 40px 80px 40px; /* 左右留白从 80px 缩减到 40px */
  }
  .cta-title { 
    font-size: 48px; /* 标题稍微缩小，防止折行过多 */
    letter-spacing: -2px; 
  }
  .cta-subtitle { 
    font-size: 16px; 
  }
  .btn-cta {
    width: auto;
    min-width: 180px;
    font-size: 18px;
    padding: 14px 20px;
  }

  .footer-brand { max-width: 213px;}
  .footer-nav-col { min-height: 247px; }
}


/* -----------------------------------------
   [ Mobile 手机端适配 ] (屏幕宽度 <= 768px)
   ----------------------------------------- */
@media screen and (max-width: 768px) {
  
  /* =========================================
     1. Navbar & 下拉菜单 (完全锁定，与主页一致)
     ========================================= */
  .navbar { 
    padding: 12px 20px; 
    flex-wrap: wrap; 
    background: rgba(255, 255, 255, 0.75); 
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
  .nav-logo { order: 1; }
  .nav-actions { order: 2; width: auto; gap: 12px; }
  
  .btn-menu-mobile {
    display: flex; width: 44px; height: 44px;
    justify-content: center; align-items: center;
    background-color: var(--text-primary); color: var(--text-one);
    border-radius: 50%; border: none; cursor: pointer;
    transition: background-color var(--transition-speed) ease;
  }

  .nav-menu {
    order: 3; width: 100%; flex-direction: column; align-items: flex-start;
    position: static; background: transparent; backdrop-filter: none;
    -webkit-backdrop-filter: none; border: none; box-shadow: none; border-radius: 0;
    max-height: 0; opacity: 0; overflow: hidden; padding: 0 10px; margin-top: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .nav-menu.active { max-height: 400px; opacity: 1; padding: 20px 10px 10px 10px; margin-top: 10px; border-top: 1px solid rgba(0, 0, 0, 0.05); }
  .nav-link { font-size: 24px; padding: 16px 0; font-weight: 500; width: 100%; }
  .nav-link.active { background: transparent; box-shadow: none; color: var(--text-primary); }

  /* --- Hero 区域 (魔法排序) --- */
  .hero-section { 
    padding: 80px 20px 40px 20px; 
  }

  .hero-subtitle {
  flex-direction: column;
  font-size: 14px;
  margin-bottom: 0;
  }
  
  .hero-content {
    gap: 300px;
    padding-bottom: 100px;
  }
  
  .hero-left { order: 1; width: 100%; }
  .hero-title, .hero-name { font-size: 60px;letter-spacing: -4.2px; }
  
  .hero-right { order: 3; max-width: 100%; }
  .hero-description { font-size: 14px; letter-spacing: -0.28px;}

  /* --- 全局 Section 调整 --- */
  .blog-section { 
    padding-left: 20px;
    padding-right: 20px;
  }

  .about-section {   
    padding: 120px 20px 80px 20px;  
    border-radius: 20px;
    gap: 40px;
  }
  .about-tag { position: absolute; top: 20px; left: 20px; margin-bottom: 80px; }
  /* --- About 区域 --- */
  .about-title {text-align: left; }
  .about-description { text-align: left; font-size: 14px; }
  .about-content { align-items: flex-start;}
  .about-stats { flex-direction: column; gap: 20px;margin-top: 0;}
  .btn-discover { font-size: 16px;padding-top: 12px; padding-bottom: 12px;}
  .stat-item { border-left: 1px solid rgba(255,255,255,0.2); padding-left: 20px; width: 100%; }
  .stat-number { font-size: 40px; }
  .stat-label { 
    font-size: 14px;
    font-weight: 400;
    letter-spacing: -0.28px;
  }

  /* --- Case Studies 区域 --- */
  .case-studies-section { padding: 20px 20px 100px 20px; gap: 0; }
  .header-left { gap: 0; }
  .header-right { display: none; } 
  .section-tag { padding-bottom: 80px; }
  .section-title {
    font-size: 48px;
    font-weight: 600;
    letter-spacing: -3.36px;
    padding-bottom: 20px;
  }
  .section-subtitle { 
  font-size: 14px;
  font-weight: 400;
  letter-spacing: -0.28px;
  padding-bottom: 20px;
  }
  .carousel-pagination {
    display: none;
  }
  .project-info { flex-direction: column; align-items: flex-start; gap: 12px; padding: 10px 12px 23px 12px; }
    
    /* 🌟 核心修正：取消 100% 宽度，并让它自身独立靠右对齐！ */
    .info-right { width: auto; align-self: center; }
    
    .info-left { gap: 0; }
    .project-title { padding-bottom: 12px; }
    .project-meta { padding-bottom: 8px; }
    
    /* 恢复按钮的自身大小 */
    .btn-read { width: auto; padding: 12px 24px; }

  /* --- Playground 区域 --- */
  .playground-section {
    padding: 120px 0 80px 0;
    border-radius: 20px;
    }
  .playground-tag { position: absolute; top: 20px; left: 20px; }
  .playground-header { align-items: flex-start; padding: 0 20px; }
  .playground-title { 
    font-size: 48px;
    letter-spacing: -3.36px;
  }

  .playground-subtitle { 
    text-align: left; 
    font-size: 14px;
    font-weight: 400;
    letter-spacing: -0.28px;
  }

  .archive-card { flex: 0 0 280px !important; width: 280px !important; height: 160px !important; }
  .marquee-track { gap: 10px; }
  /* 修改前是 15s，现在改为 30s */
  .marquee-track { gap: 10px; animation: marqueeScrollMobile 30s linear infinite; }

  /* 重新计算：6张卡片(6*280) + 6个间隙(6*10) = 1680 + 60 = 1740px */
  @keyframes marqueeScrollMobile {
    0% { transform: translateX(0); }
    100% { transform: translateX(-1740px); }
  }

/* --- CTA 区域 (Mobile) --- */
  .cta-section { 
    padding: 80px 20px 80px 20px; /* 左右留白缩减到极致的 20px */
  }
  .cta-content { 
    gap: 24px; /* 元素间距稍微拉开一点，保证触控呼吸感 */
  }
  .cta-title { 
    font-size: 40px; /* 手机端最舒适的大标题字号 */
    letter-spacing: -1.5px; 
  }
  .cta-challenge { 
    padding-right: 8px; /* 修正手机端斜体字凸出过多的问题 */
  }
  .cta-subtitle { 
    font-size: 14px; 
    line-height: 1.5;
    letter-spacing: -0.28px;
  }
  .btn-cta { 
    font-size: 16px; 
    padding: 16px;
  }

  /* --- Footer 区域 --- */
  .footer-section { padding: 120px 20px 40px 20px; border-radius: 20px 20px 0 0; }
  .footer-logo { max-width: 60px; height: auto; padding-bottom: 20px; object-fit: cover;}
  .footer-slogan { 
  font-size: 20px;
  font-weight: 400;
}
  .footer-link {font-size: 14px;}
  .footer-col-title {font-size: 20px;}
  .footer-top { flex-direction: column; gap: 40px; }
  .footer-links-container { flex-direction: column; gap: 40px; }
  .footer-nav-col { gap: 20px; width: 168px; min-height: 178px;}
  .copyright-text, .legal-link{ font-size: 14px; }
}