/* 基础样式与变量 */
:root {
  --bg: #0b0c10;
  --panel: #0f1117;
  --panel-2: #11131a;
  --text: #e5e7eb;
  --muted: #9aa3b2;
  --primary: #6366f1; /* 靛蓝 */
  --primary-600: #5457e0;
  --primary-700: #4447c9;
  --accent: #22d3ee;  /* 青色点缀 */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 14px;
  --shadow-1: 0 10px 30px rgba(0,0,0,0.35);
  --shadow-2: 0 20px 60px rgba(0,0,0,0.45);
  --glass: rgba(255,255,255,0.04);
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: 1px solid rgba(255,255,255,0.06);
  --elevation-1: 0 4px 12px rgba(0,0,0,0.15);
  --elevation-2: 0 8px 24px rgba(0,0,0,0.25);
  --elevation-3: 0 16px 40px rgba(0,0,0,0.35);
  --text-strong: #f8fafc;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: radial-gradient(1200px 11800px at 70% -10%, rgba(99,102,241,0.15), transparent),
              radial-gradient(900px 25600px at 10% 0%, rgba(34,211,238,0.12), transparent),
              var(--bg);
  color: var(--text);
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
  line-height: 1.8; /* 增加基础行高 */
  letter-spacing: 0.015em; /* 增加字间距 */
}

p {
  color: var(--muted);
  line-height: 1.9; /* 增加段落行高 */
  margin-bottom: 1.5em; /* 增加段落间距 */
}

/* Utility: 强制指定段落文本为100%不透明（仅用于目标段落） */
.text-opaque { opacity: 1 !important; }
.h3, h3 {
  letter-spacing: -0.01em;
  margin-bottom: 1.2em; /* 增加标题下方间距 */
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px; /* 增加左右内边距 */
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  backdrop-filter: saturate(140%) blur(10px);
  background: linear-gradient(180deg, rgba(15,17,23,0.85), rgba(15,17,23,0.65));
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-container {
  display: flex; align-items: center; justify-content: space-between;
  height: 78px; /* 增加导航栏高度 */
  padding: 0 32px; /* 增加导航栏内边距 */
}
.logo-container { display: flex; align-items: center; gap: 12px; }
.logo-icon { filter: drop-shadow(0 6px 18px rgba(99,102,241,0.35)); }
.brand-text { font-weight: 700; letter-spacing: 0.5px; color: #e6ecff; }
.nav-menu { display: flex; align-items: center; gap: 24px; } /* 增加菜单项间距 */
.nav-link {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  padding: 12px 16px; /* 增加链接内边距 */
  border-radius: 10px;
}
.nav-link:hover { color: var(--text); background: var(--glass); }
.nav-link.active { color: var(--primary); background: rgba(99,102,241,0.08); border:1px solid rgba(99,102,241,0.25); }
.cta-button {
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px 20px; /* 增加按钮内边距 */
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(99,102,241,0.35);
}
.cta-button:hover { background: var(--primary-600); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); }

/* 修复内页锚点偏移：仅对导航锚点对应的区域生效，避免影响其他页面的所有 section */
#home, #marketplace, #features, #pricing, #roadmap, #about {
  scroll-margin-top: 120px; /* 导航栏高度 78px + 余量 42px */
}

/* Hero */
.hero {
  padding: 180px 0 120px; /* 进一步增加上下间距 */
  position: relative;
  overflow: hidden;
  scroll-margin-top: 78px; /* 首屏区域 */
}
.hero-background { position: absolute; inset: 0; pointer-events: none; }
.hero-gradient { position: absolute; inset: -20% -20% -20% -20%; background: radial-gradient(800px 600px at 70% 0%, rgba(99,102,241,0.25), transparent), radial-gradient(700px 500px at 20% 20%, rgba(34,211,238,0.15), transparent); filter: blur(40px); }
.hero-pattern { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px); background-size: 24px 24px; mask-image: radial-gradient(ellipse at 60% -10%, black 40%, transparent 70%); }
.hero-content {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr; /* 调整左右比例，给文字更多空间 */
  gap: 80px; /* 进一步增加左右内容间距 */
  align-items: center;
}
.hero-title {
  font-size: 56px;
  line-height: 1.2; /* 增加标题行高 */
  margin: 0 0 32px; /* 增加标题下方间距 */
  letter-spacing: -0.02em;
}
.title-highlight { color: var(--primary); text-shadow: 0 10px 30px rgba(99,102,241,0.35); }
.title-main { color: var(--text-strong); font-weight: 800; letter-spacing: .5px; }
.hero-subtitle {
  color: var(--muted);
  font-size: 20px; /* 增大字号 */
  line-height: 2.1; /* 增加副标题行高 */
  margin-bottom: 40px; /* 增加下方间距 */
  max-width: 90%; /* 增加宽度限制提升可读性 */
}
.hero-actions {
  display: flex;
  gap: 20px; /* 增加按钮间距 */
  margin-top: 16px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px; /* 增加统计项间距 */
  margin-top: 48px; /* 增加上方间距 */
}
/* 当统计容器为空时隐藏并移除顶部间距，避免留白 */
.hero-stats:empty { display: none; margin-top: 0; }
.hero-stats .stat-number { font-variant-numeric: tabular-nums; letter-spacing:.5px; text-shadow: 0 6px 30px rgba(0,0,0,.6); }

/* Hero Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px; /* 增加内边距 */
  border-radius: 999px;
  background: linear-gradient(120deg, rgba(82,91,255,0.25), rgba(0,213,255,0.18));
  border: 1px solid rgba(120,150,255,0.35);
  color: var(--text); opacity: 0.95;
  backdrop-filter: blur(8px);
  box-shadow: var(--elevation-2);
  transform: translateY(-2px);
  margin-bottom: 36px; /* 增加下方间距 */
}
.hero-badge .badge-icon { filter: drop-shadow(0 2px 8px rgba(0,213,255,0.4)); }

/* Hero Features */
.hero-features { display:flex; gap:16px; margin:22px 0 8px; flex-wrap:wrap; }
.feature-highlight {
  display:flex; align-items:center; gap:10px;
  padding:10px 14px; border-radius:14px;
  background: var(--glass-bg); border: var(--glass-border);
  box-shadow: var(--elevation-1);
}
.feature-highlight i { color: var(--accent); opacity:.9; }

/* Hero Highlights */
.hero-highlights { display:flex; flex-wrap:wrap; gap:12px; margin:16px 0 8px; }
.hero-highlights .highlight-item { display:flex; align-items:center; gap:8px; padding:7px 12px; border-radius:999px; background: rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.12); color: var(--muted); box-shadow: var(--elevation-1); }
.hero-highlights .highlight-icon { width:18px; height:18px; display:grid; place-items:center; filter: drop-shadow(0 0 6px rgba(99,102,241,0.45)); }

/* 按钮样式 */
.btn-primary, .btn-secondary { padding: 12px 18px; border-radius: 12px; border: 1px solid rgba(255,255,255,0.08); background: var(--panel); color: var(--text); cursor: pointer; font-weight: 600; }
.btn-primary { background: linear-gradient(180deg, var(--primary), var(--primary-600)); border: none; box-shadow: 0 16px 30px rgba(99,102,241,0.35); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-secondary:hover { background: var(--panel-2); }
.btn-primary.large, .btn-secondary.large { padding: 14px 20px; font-size: 16px; }
.btn-primary.large { padding:16px 22px; font-size:1.05rem; }
.btn-primary.large .btn-subtitle { display:block; font-size:.75rem; opacity:.75; margin-top:4px; font-weight:500; }
.btn-primary.gradient { background: linear-gradient(135deg, #6366f1, #22d3ee); border: none; }
.btn-primary.gradient:hover { filter: brightness(1.05); }

/* Demo Button */
.btn-demo {
  position: relative;
  padding: 16px 22px;
  font-size: 16px;
  font-weight: 700;
  border-radius: 14px;
  color: var(--text);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(6px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.08);
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.btn-demo::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 15px;
  padding: 1px;
  background: linear-gradient(135deg, #6366f1, #22d3ee);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: .55;
  pointer-events: none;
}
.btn-demo .pulse {
  width: 10px; height: 10px; border-radius: 50%; background: #22d3ee;
  box-shadow: 0 0 0 0 rgba(34,211,238,0.6);
  animation: pulse 1.6s infinite;
}
.btn-demo:hover { transform: translateY(-2px); border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.08); }
.btn-demo:active { transform: translateY(0); box-shadow: 0 6px 16px rgba(0,0,0,0.3); }
.btn-demo .label { display: flex; flex-direction: column; line-height: 1.1; }
.btn-demo .label .title { font-weight: 800; }
.btn-demo .label .desc { font-size: 12px; opacity: .75; font-weight: 600; }

/* 统计项 */
.stat-item { background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.05); border-radius: 14px; padding: 14px; text-align: center; }
.stat-number { font-size: 22px; font-weight: 700; color: var(--text); }
.stat-label { color: var(--muted); font-size: 12px; }

/* Feature Status */
.feature-status { margin-left:6px; padding:4px 8px; border-radius:10px; font-size:.75rem; letter-spacing:.3px; }
.feature-status.new { background: rgba(0,213,255,.12); color:#41e4ff; border:1px solid rgba(0,213,255,.35); }
.feature-status.hot { background: rgba(255,102,0,.14); color:#ffae6e; border:1px solid rgba(255,102,0,.35); }
.feature-status.live { background: rgba(82,255,168,.14); color:#9dffdb; border:1px solid rgba(82,255,168,.35); }
.feature-status.revolutionary { background: rgba(255,255,255,0.08); color: #fff; border-color: rgba(255,255,255,0.25); }

/* Preview Window */
.feature-preview { perspective: 1200px; }
.preview-window { background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02)); border: 1px solid rgba(255,255,255,0.08); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow-2); transform: rotateY(-8deg) rotateX(2deg); }
.window-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; background: rgba(0,0,0,0.35); border-bottom: 1px solid rgba(255,255,255,0.06); }
.window-controls { display: flex; gap: 6px; }
.control-btn { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.control-btn.close { background: #ef4444; }
.control-btn.minimize { background: #f59e0b; }
.control-btn.maximize { background: #10b981; }
.window-title { color: var(--muted); font-size: 12px; }
.window-content { padding: 16px; background: rgba(0,0,0,0.25); }

/* Product Name Emphasis: 强化预览窗口标题“虚幻助手”的视觉表现 */
.preview-window .window-header .window-title {
  position: relative;
  font-weight: 800;
  letter-spacing: 0.6px;
  font-size: 14px;
  /* 采用品牌色系的渐变文字 */
  background: linear-gradient(135deg, var(--text-strong), #bcd0ff 28%, var(--accent) 56%, var(--primary) 84%);
  background-size: 220% 220%;
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
          color: transparent;
  text-shadow: 0 2px 12px rgba(99,102,241,0.35), 0 0 8px rgba(34,211,238,0.25);
  animation: windowTitleSheen 9s linear infinite;
}

.preview-window .window-header .window-title::after {
  content: "";
  position: absolute;
  left: -2px; right: -2px; bottom: -4px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.65), rgba(34,211,238,0.65), transparent);
  opacity: .75;
  filter: blur(.2px);
}

@keyframes windowTitleSheen {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.preview-dashboard { display: grid; grid-template-columns: 200px 1fr; gap: 16px; }
.dashboard-sidebar { background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.05); border-radius: 12px; padding: 12px; }
.sidebar-item { display: flex; align-items: center; gap: 10px; padding: 10px; border-radius: 10px; color: var(--muted); }
.sidebar-item.active, .sidebar-item:hover { background: rgba(99,102,241,0.12); color: var(--text); }
.dashboard-main { background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.05); border-radius: 12px; padding: 12px; }
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

/* 预览面板：6列竖向文本卡片样式 */
.preview-dashboard .project-grid {
  grid-template-columns: repeat(6, 60px); /* 6列等宽（缩小一半） */
  justify-content: center; /* 居中以适配整体布局 */
  width: max-content; /* 自适应容器宽度以匹配卡片尺寸 */
  margin: 0 auto; /* 居中容器 */
}
.preview-dashboard .project-card {
  width: 60px;
  min-width: 60px; /* 覆盖全局的 min-width */
}
.preview-dashboard .project-info {
  min-height: 90px; /* 随卡片宽度缩小，仍可容纳两行竖排 */
  display: grid;
  place-items: center; /* 居中对齐 */
}
.preview-dashboard .project-info h4,
.preview-dashboard .project-info p {
  writing-mode: vertical-rl;
  text-orientation: upright;
  letter-spacing: 1px;
  margin: 0;
}
.preview-dashboard .project-info h4 {
  font-size: 14px;
  letter-spacing: 1px;
}
.preview-dashboard .project-info p {
  font-size: 12px;
  opacity: .9;
}
.project-thumbnail { height: 90px; background: linear-gradient(135deg, rgba(99,102,241,0.35), rgba(34,211,238,0.25)); }
.project-info { padding: 10px; }
.project-info p{ color: #9aa3b23d; }
/* Section headers */
.section-header { text-align: center; margin-bottom: 48px; }
.section-title { display: inline-block; font-size: 32px; margin: 0 auto 12px; font-weight: 900; letter-spacing: -0.015em; }
.section-subtitle { color: var(--muted); margin: 0; max-width: 680px; margin: 12px auto 0; font-size: 16px; line-height: 1.9; }

/* Problems */
.problems-section { padding: 88px 0; }
.problems-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.problem-card { background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.05); border-radius: 14px; padding: 20px; transition: transform .25s ease, box-shadow .25s ease; }
.problem-card h3 { margin: 8px 0 6px; letter-spacing: -0.01em; }
.problem-card p { margin: 0; line-height: 1.85; }
.problem-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.35); }
.problem-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 10px; background: rgba(99,102,241,0.15); color: var(--primary); margin-bottom: 10px; }

/* Features */
.features-section { padding: 72px 0 90px; }
.features-container { display: flex; flex-direction: column; gap: 56px; }
.feature-block { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 36px; align-items: center; background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.06); border-radius: 18px; padding: 28px; }
.feature-block.reverse { grid-template-columns: 0.95fr 1.05fr; }
.feature-block.highlight { border-color: rgba(99,102,241,0.35); box-shadow: 0 0 0 1px rgba(99,102,241,0.2) inset, 0 20px 60px rgba(99,102,241,0.12); }
.feature-icon { width: 52px; height: 52px; border-radius: 14px; background: rgba(99,102,241,0.15); display: grid; place-items: center; color: var(--primary); margin-bottom: 12px; }
.feature-icon.gradient { background: linear-gradient(135deg, rgba(99,102,241,0.25), rgba(34,211,238,0.2)); border:1px solid rgba(99,102,241,0.35); }
.feature-content h3 { margin: 0 0 10px; }
.feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; color: var(--muted); }
.feature-list li { display: flex; align-items: center; gap: 8px; }
.feature-visual .feature-demo { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 14px; overflow: hidden; }
.demo-header { padding: 12px 16px; background: rgba(0,0,0,0.35); border-bottom: 1px solid rgba(255,255,255,0.06); }
.demo-title { color: var(--muted); font-weight: 600; }
.demo-content { padding: 16px; }

/* 通用卡片样式 */
.section-card, .feature-card, .pricing-card, .roadmap-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015));
  border: var(--glass-border);
  box-shadow: var(--elevation-3);
}

/* Engine Versions */
.engine-versions { display: flex; gap: 8px; margin-bottom: 12px; }
.version-item { padding: 6px 10px; border-radius: 10px; background: rgba(255,255,255,0.05); color: var(--muted); border: 1px solid rgba(255,255,255,0.06); }
.version-item.active { background: rgba(99,102,241,0.18); color: var(--text); }
.project-cards { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
.demo-card { border-radius: 12px; overflow: hidden; border: 1px solid rgba(255,255,255,0.06); background: rgba(255,255,255,0.03); }
.card-thumb { height: 80px; background: linear-gradient(135deg, rgba(99,102,241,0.35), rgba(34,211,238,0.25)); }
.card-info { padding: 10px; }

/* Folder Tree */
.folder-tree { display: grid; gap: 8px; margin-bottom: 12px; }
.folder-item { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.folder-item.active { color: var(--text); }
.asset-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 10px; }
.asset-item { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06); border-radius: 10px; padding: 10px; display: flex; align-items: center; gap: 8px; }
.asset-icon { width: 30px; height: 30px; display: grid; place-items: center; background: rgba(99,102,241,0.15); border-radius: 8px; }

/* Blueprint Canvas */
.blueprint-canvas { position: relative; height: 160px; background: repeating-linear-gradient(0deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 24px), repeating-linear-gradient(90deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 24px); border-radius: 12px; border: 1px solid rgba(255,255,255,0.06); }


/* Global: center all H2 headings site-wide */
h2 { text-align: center; }

/* 顶部导航品牌名称：简约大气品牌配色 */
.logo-container .brand-text {
  font-weight: 900;
  letter-spacing: 0.8px;
  color: #e6ecff;
}

/* About 区域标题：增强“关于虚幻助手”视觉层级 */
#about .section-header .section-title {
  background: linear-gradient(135deg, var(--text-strong), #bcd0ff 28%, var(--accent) 56%, var(--primary) 84%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
          color: transparent;
  text-shadow: 0 6px 26px rgba(99,102,241,0.28);
}


/* Search */
.search-bar { display: flex; align-items: center; gap: 8px; padding: 10px 12px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06); border-radius: 12px; color: var(--muted); }
.typing-text { color: var(--text); font-weight: 600; }
.search-results { margin-top: 12px; display: grid; gap: 10px; }
.result-item { display: flex; align-items: center; gap: 10px; padding: 10px; background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.05); border-radius: 10px; }

/* Community */
.community-posts { display: grid; gap: 12px; }
.post-item { display: grid; grid-template-columns: 40px 1fr; gap: 10px; }
.post-avatar { width: 40px; height: 40px; display: grid; place-items: center; background: rgba(255,255,255,0.06); border-radius: 10px; }
.post-stats { display: flex; gap: 10px; color: var(--muted); font-size: 12px; }

/* Pricing */
.pricing-section { padding: 80px 0; }
.pricing-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pricing-card { background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.06); border-radius: 16px; padding: 20px; position: relative; transition: transform .25s ease, box-shadow .25s ease; }
.pricing-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.35); }
.pricing-card.featured { box-shadow: 0 0 0 1px rgba(99,102,241,0.35) inset, 0 30px 80px rgba(99,102,241,0.22); border-color: rgba(99,102,241,0.35); }
.card-badge { position: absolute; top: 12px; right: 12px; background: rgba(99,102,241,0.2); color: var(--text); border: 1px solid rgba(99,102,241,0.35); padding: 4px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.card-header h3 { margin: 0 0 6px; }
.price { display: flex; align-items: baseline; gap: 6px; }
.currency { color: var(--muted); }
.amount { font-size: 36px; font-weight: 800; }
.period { color: var(--muted); }
.card-features { display: grid; gap: 10px; margin: 12px 0; color: var(--muted); }
.card-button { width: 100%; padding: 12px; border-radius: 12px; border: 1px solid rgba(255,255,255,0.08); background: var(--panel); color: var(--text); font-weight: 700; cursor: pointer; }
.card-button.primary { background: linear-gradient(180deg, var(--primary), var(--primary-600)); border: none; box-shadow: 0 16px 30px rgba(99,102,241,0.35); }

/* Roadmap */
.roadmap-section { padding: 80px 0; }
.roadmap-timeline { display: grid; gap: 24px; position: relative; }
.timeline-item { display: grid; grid-template-columns: 32px 1fr; gap: 16px; align-items: flex-start; }
.timeline-marker { width: 14px; height: 14px; border-radius: 50%; background: rgba(255,255,255,0.2); border: 2px solid rgba(255,255,255,0.4); margin-top: 10px; box-shadow: 0 0 0 6px rgba(255,255,255,0.03); }
.timeline-marker.current { background: var(--primary); border-color: #a5b4fc; box-shadow: 0 0 0 6px rgba(99,102,241,0.15), 0 0 25px rgba(99,102,241,0.35); }
.timeline-content { background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.06); border-radius: 14px; padding: 16px; }
.timeline-period { color: var(--muted); font-weight: 700; margin-bottom: 6px; }
.timeline-features { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.feature-tag { padding: 6px 8px; border-radius: 999px; background: rgba(99,102,241,0.15); color: var(--text); border: 1px solid rgba(99,102,241,0.25); font-size: 12px; }

/* About */
.about-section { padding: 80px 0; }
.about-content { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.achievement-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 10px; }
.achievement-item { background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.06); border-radius: 12px; padding: 12px; text-align: center; }
.achievement-number { font-size: 22px; font-weight: 800; }
.achievement-label { color: var(--muted); font-size: 12px; }
.growth-chart { background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.06); border-radius: 14px; padding: 12px; }
.chart-content { padding: 10px 0 0; }
.chart-bars { display: grid; grid-template-columns: repeat(5, 1fr); align-items: end; gap: 8px; height: 160px; }
.bar { background: linear-gradient(180deg, rgba(99,102,241,0.35), rgba(34,211,238,0.25)); border-radius: 6px 6px 0 0; }
.chart-labels { display: grid; grid-template-columns: repeat(5, 1fr); color: var(--muted); font-size: 12px; margin-top: 6px; }

/* CTA */
.cta-section { padding: 80px 0; }
.cta-content { text-align: center; background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)); border: 1px solid rgba(255,255,255,0.06); border-radius: 18px; padding: 32px; box-shadow: var(--shadow-1); }
.cta-actions { display: flex; gap: 12px; justify-content: center; margin-top: 16px; }

/* Footer */
.footer { padding: 60px 0 24px; background: rgba(0,0,0,0.35); border-top: 1px solid rgba(255,255,255,0.06); }
.footer-content { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.footer-brand p { color: var(--muted); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.link-group h4 { margin: 0 0 10px; }
.link-group a { display: block; color: var(--muted); text-decoration: none; padding: 4px 0; }
.link-group a:hover { color: var(--text); }
.footer-bottom { margin-top: 24px; text-align: center; color: var(--muted); font-size: 12px; }

/* Marketplace */
/* Marketplace density tuning */
.marketplace-section { padding: 56px 0 100px; }
.marketplace-title { font-size: 34px; line-height: 1.15; letter-spacing: -0.015em; max-width: 820px; margin: 0 auto; }
.section-subtitle.marketplace-desc { max-width: 760px; }
.marketplace-badge { display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); }
.marketplace-badge .badge-icon { filter: drop-shadow(0 2px 8px rgba(255,255,255,0.35)); }
.marketplace-tip { display:flex; align-items:center; gap:10px; padding:10px 14px; border-radius:12px; background: rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.12); color: var(--muted); margin-bottom:12px; box-shadow: var(--elevation-2); }
.marketplace-tip .tip-dot { width:8px; height:8px; border-radius:50%; background: #22d3ee; box-shadow:0 0 10px rgba(34,211,238,0.8); }
.marketplace-tip .tip-text { font-size: 14px; letter-spacing:0.2px; }
.marketplace-showcase { display:flex; flex-direction:column; gap:32px; }
/* 如果统计模块被移除，减少与 features 的间距 */
.marketplace-showcase > .marketplace-features:first-child { margin-top: 0; }
.showcase-stats { display:grid; grid-template-columns: repeat(3, 1fr); gap:20px; }
.stat-card { position: relative; display:flex; align-items:center; gap:12px; padding:14px 16px; border-radius:16px; background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015)); border: 1px solid rgba(255,255,255,0.08); box-shadow: var(--elevation-2); overflow: hidden; }
.stat-card.featured { box-shadow: 0 20px 50px rgba(99,102,241,0.25), inset 0 0 0 1px rgba(99,102,241,0.35); }
.stat-card.featured::after {
  content: ""; position: absolute; inset: -20%; background: radial-gradient(600px 300px at 50% 0%, rgba(99,102,241,0.2), transparent);
  filter: blur(30px); pointer-events: none;
}
.stat-icon { font-size:22px; }
.stat-number { font-size:26px; font-weight:800; color: var(--text-strong); }
.stat-number.highlight { color: #a5b4fc; text-shadow: 0 6px 24px rgba(99,102,241,0.35); }
.stat-trend { display:flex; align-items:center; gap:6px; margin-top: 6px; color: #10b981; font-weight:600; }
.stat-trend i { font-size: 12px; }
.stat-sparkline { position:absolute; right:10px; bottom:10px; display:flex; align-items:flex-end; gap:3px; opacity:0.8; }
.sparkline-bar { width:4px; background: linear-gradient(180deg, rgba(99,102,241,0.8), rgba(99,102,241,0.2)); border-radius: 999px; animation: sparkFloat 2.6s ease-in-out infinite alternate; }
.sparkline-bar:nth-child(odd) { animation-duration: 2.1s; }
.marketplace-features { display:grid; grid-template-columns: repeat(3, 1fr); gap:24px; }
.market-feature-card { padding:24px; border-radius:18px; background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015)); border: 1px solid rgba(255,255,255,0.08); box-shadow: var(--elevation-2); transition: transform 0.3s ease, box-shadow 0.3s ease; }
.market-feature-card:hover { transform: translateY(-4px); box-shadow: var(--elevation-3); }
.feature-header { display:flex; align-items:center; justify-content: space-between; gap:14px; margin-bottom:14px; }
.feature-highlights { display:grid; gap:10px; color: var(--muted); }
.highlight-item { display:flex; align-items:center; gap:8px; }
.marketplace-cta { margin-top: 10px; border-radius: 22px; border: 1px solid rgba(255,255,255,0.08); background: radial-gradient(800px 400px at 60% -20%, rgba(99,102,241,0.15), transparent), linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015)); box-shadow: var(--elevation-3); overflow:hidden; }
.marketplace-cta .cta-content { padding: 28px; display:flex; flex-direction:column; gap:14px; }

/* 动画与交互 */
.animate-on-scroll { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* 漂浮动效 */
@keyframes float {
  0% { transform: translateY(0) rotateY(-8deg) rotateX(2deg); }
  50% { transform: translateY(-6px) rotateY(-7deg) rotateX(2deg); }
  100% { transform: translateY(0) rotateY(-8deg) rotateX(2deg); }
}
.animate-float { animation: float 6s ease-in-out infinite; }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34,211,238,0.6); }
  70% { box-shadow: 0 0 0 12px rgba(34,211,238,0); }
  100% { box-shadow: 0 0 0 0 rgba(34,211,238,0); }
}

@keyframes sparkFloat { from { transform: translateY(2px); } to { transform: translateY(-4px); } }

/* 细节交互动效 */
.problem-card:hover .problem-icon { transform: scale(1.05); }
.version-item:hover, .asset-item:hover, .result-item:hover { transform: translateY(-2px); }
.feature-card:hover, .pricing-card:hover, .roadmap-card:hover { transform: translateY(-3px); transition: transform .25s ease; }

/* 响应式优化 */
@media (max-width: 1100px) {
  .hero-content { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .marketplace-features { grid-template-columns: repeat(2, 1fr); }
  .showcase-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
  .marketplace-features { grid-template-columns: 1fr; gap: 20px; }
  .showcase-stats { grid-template-columns: 1fr; gap: 16px; }
}

@media (max-width: 900px) {
  .problems-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .pricing-cards { grid-template-columns: 1fr; }
  .about-content { grid-template-columns: 1fr; }
  .achievement-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-block, .feature-block.reverse { grid-template-columns: 1fr; gap: 20px; }
  .footer-content { grid-template-columns: 1fr; }
  .nav-toggle { display: flex; }
  .nav-menu { position: fixed; top: 72px; left: 0; right: 0; background: rgba(15,17,23,0.98); padding: 12px 16px; display: none; flex-direction: column; gap: 8px; border-bottom: 1px solid rgba(255,255,255,0.06); }
  .nav-menu.show { display: flex; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .hero { padding: 140px 0 80px; }
  .hero-title { font-size: 42px; line-height: 1.25; }
  .hero-subtitle { font-size: 18px; line-height: 2.0; max-width: 100%; margin-bottom: 32px; }
  .hero-highlights { gap:8px; }
  .hero-highlights .highlight-item { padding:8px 12px; font-size: 14px; }
  .hero-actions { flex-direction: column; gap: 14px; }
  .hero-actions .btn-primary.large, .hero-actions .btn-demo {
    width: 100%;
    text-align: center;
    justify-content: center;
    margin-right: 0;
  }
  .hero-actions .btn-secondary.large {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 32px; }
  .section-title { font-size: 30px; }
  .feature-block { padding: 20px; gap: 24px; }
  .hero-features { gap:12px; }
  .feature-highlight { padding:10px 14px; }
  .btn-primary.large, .btn-secondary.large { width:100%; justify-content:center; }
  .marketplace-tip { padding:10px 14px; margin-bottom:12px; }
  .marketplace-tip .tip-text { font-size: 14px; }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: 1fr; gap: 12px; }
  .stat-number { font-size: 20px; }
  .stat-label { font-size: 11px; }
  .problems-grid { grid-template-columns: 1fr; gap: 12px; }
}

/* Minimal Mode */
body.minimal .ai-badge,
body.minimal .card-badge,
body.minimal .feature-badge,
body.minimal .marketplace-badge,
body.minimal .marketplace-tip,
body.minimal .stat-sparkline,
body.minimal .control-btn,
body.minimal .hero-badge {
  display: none !important;
}

body.minimal .hero-highlights { gap: 8px; opacity: .95; }
body.minimal .hero-highlights .highlight-item {
  background: transparent !important;
  border-color: rgba(255,255,255,0.08) !important;
  box-shadow: none !important;
  color: var(--muted);
  padding: 6px 10px !important;
}
body.minimal .hero-highlights .highlight-item:nth-child(n+3) { display: none !important; }

body.minimal .section-card,
body.minimal .feature-card,
body.minimal .pricing-card,
body.minimal .roadmap-card,
body.minimal .problem-card,
body.minimal .market-feature-card,
body.minimal .dashboard-main,
body.minimal .dashboard-sidebar,
body.minimal .result-item {
  box-shadow: none !important;
  background: rgba(255,255,255,0.02) !important;
  border-color: rgba(255,255,255,0.06) !important;
}
body.minimal .feature-card:hover,
body.minimal .pricing-card:hover,
body.minimal .roadmap-card:hover,
body.minimal .problem-card:hover,
body.minimal .market-feature-card:hover {
  transform: none !important;
  box-shadow: none !important;
}

body.minimal .btn-primary.gradient {
  background: linear-gradient(0deg, var(--primary), var(--primary)) !important;
  box-shadow: none !important;
}
body.minimal .btn-demo {
  background: transparent !important;
  border-color: rgba(255,255,255,0.14) !important;
  box-shadow: none !important;
}

body.minimal .section-title { letter-spacing: .2px; font-weight: 750; }
body.minimal .hero-title { letter-spacing: .2px; }

body.minimal .hero-pattern,
body.minimal .hero-bg-gradient { opacity: .5; }
/* Projects Showcase Section */
.projects-showcase-section {
  padding: 72px 0 64px;
}
.projects-showcase-section .section-title {
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: 0.2px;
}
.projects-workspace {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 28px;
  align-items: start;
  margin-top: 20px;
}

/* Toolbar */
.workspace-toolbar {
  position: sticky;
  top: 84px;
  align-self: start;
}
.toolbar-section {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.toolbar-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted-text);
  margin-bottom: 12px;
}
.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.tool-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
}
.tool-icon {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  color: var(--accent-color);
}
.tool-info h4 {
  font-size: 14px;
  margin: 0 0 2px;
}
.tool-info p {
  font-size: 12px;
  color: var(--muted-text);
  margin: 0;
}

/* Engine Versions */
.engine-versions-section { margin-top: 10px; }
.versions-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.version-card {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 10px 12px;
}
.version-icon img { width: 36px; height: 36px; }
.version-info { line-height: 1.2; }
.version-number { font-weight: 700; font-size: 14px; }
.version-status { font-size: 12px; color: var(--muted-text); }
.version-launch {
  padding: 8px 12px;
  font-size: 12px;
  border-radius: 8px;
  background: var(--accent-color);
  border: none;
  color: #fff;
  cursor: pointer;
}
.version-launch:hover { filter: brightness(1.05); }

/* My Projects - Horizontal Scroller */
.my-projects-section { margin-top: 20px; }
.projects-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.project-count {
  display: inline-flex;
  width: 20px; height: 20px; border-radius: 6px;
  align-items: center; justify-content: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
  font-size: 12px; margin-left: 6px;
}
.projects-controls { display: flex; gap: 10px; }
.projects-btn {
  padding: 8px 12px; border-radius: 8px; font-size: 12px; cursor: pointer;
  border: 1px solid rgba(255,255,255,0.1); background: rgba(255,255,255,0.02); color: var(--text-color);
}
.projects-btn.primary { background: var(--accent-color); color: #fff; border-color: var(--accent-color); }

.projects-grid {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 280px);
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.projects-grid::-webkit-scrollbar { height: 10px; }
.projects-grid::-webkit-scrollbar-track { background: rgba(255,255,255,0.04); border-radius: 10px; }
.projects-grid::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.18); border-radius: 10px; }

.project-card {
  scroll-snap-align: start;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease;
}
.project-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.18); }
.project-thumbnail { position: relative; aspect-ratio: 16/9; background: rgba(255,255,255,0.04); }
.project-thumbnail img { width: 100%; height: 100%; object-fit: cover; display: block; }
.project-version-badge {
  position: absolute; left: 10px; top: 10px; padding: 4px 8px; border-radius: 8px;
  background: rgba(17, 181, 252, 0.12); color: #11b5fc; font-weight: 700; font-size: 12px;
  border: 1px solid rgba(17, 181, 252, 0.28);
}
.project-info { padding: 12px; display: grid; gap: 6px; text-align: center; }
.project-name { font-size: 15px; margin: 0; }
.project-path { font-size: 12px; color: var(--muted-text); margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.project-meta { display: flex; gap: 10px; font-size: 12px; color: var(--muted-text); }

/* Responsive */
@media (max-width: 1100px) {
  .projects-workspace { grid-template-columns: 1fr; }
  .workspace-toolbar { position: static; }
  .versions-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
  .projects-showcase-section { padding: 56px 0 48px; }
  .projects-grid { grid-auto-columns: minmax(220px, 80%); gap: 14px; }
  .toolbar-section { padding: 12px; }
  .version-card { grid-template-columns: 36px 1fr auto; padding: 8px 10px; }
  .version-icon img { width: 28px; height: 28px; }
  .version-number { font-size: 13px; }
}

/* Section headers */
.section-header { text-align: center; margin-bottom: 48px; }
.section-title { display: inline-block; font-size: 32px; margin: 0 auto 12px; font-weight: 900; letter-spacing: -0.015em; }
.section-subtitle { color: var(--muted); margin: 0; max-width: 680px; margin: 12px auto 0; font-size: 16px; line-height: 1.9; }

/* Problems */
.problems-section { padding: 88px 0; }
.problems-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.problem-card { background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.05); border-radius: 14px; padding: 20px; transition: transform .25s ease, box-shadow .25s ease; }
.problem-card h3 { margin: 8px 0 6px; letter-spacing: -0.01em; }
.problem-card p { margin: 0; line-height: 1.85; }
.problem-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.35); }
.problem-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 10px; background: rgba(99,102,241,0.15); color: var(--primary); margin-bottom: 10px; }

/* Features */
.features-section { padding: 72px 0 90px; }
.features-container { display: flex; flex-direction: column; gap: 56px; }
.feature-block { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 36px; align-items: center; background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); border: 1px solid rgba(255,255,255,0.06); border-radius: 18px; padding: 28px; }
.feature-block.reverse { grid-template-columns: 0.95fr 1.05fr; }
.feature-block.highlight { border-color: rgba(99,102,241,0.35); box-shadow: 0 0 0 1px rgba(99,102,241,0.2) inset, 0 20px 60px rgba(99,102,241,0.12); }
.feature-icon { width: 52px; height: 52px; border-radius: 14px; background: rgba(99,102,241,0.15); display: grid; place-items: center; color: var(--primary); margin-bottom: 12px; }
.feature-icon.gradient { background: linear-gradient(135deg, rgba(99,102,241,0.25), rgba(34,211,238,0.2)); border:1px solid rgba(99,102,241,0.35); }
.feature-content h3 { margin: 0 0 10px; }
.feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; color: var(--muted); }
.feature-list li { display: flex; align-items: center; gap: 8px; }
.feature-visual .feature-demo { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 14px; overflow: hidden; }
.demo-header { padding: 12px 16px; background: rgba(0,0,0,0.35); border-bottom: 1px solid rgba(255,255,255,0.06); }
.demo-title { color: var(--muted); font-weight: 600; }
.demo-content { padding: 16px; }

/* 通用卡片样式 */
.section-card, .feature-card, .pricing-card, .roadmap-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015));
  border: var(--glass-border);
  box-shadow: var(--elevation-3);
}

/* Engine Versions */
.engine-versions { display: flex; gap: 8px; margin-bottom: 12px; }
.version-item { padding: 6px 10px; border-radius: 10px; background: rgba(255,255,255,0.05); color: var(--muted); border: 1px solid rgba(255,255,255,0.06); }
.version-item.active { background: rgba(99,102,241,0.18); color: var(--text); }
.project-cards { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
.demo-card { border-radius: 12px; overflow: hidden; border: 1px solid rgba(255,255,255,0.06); background: rgba(255,255,255,0.03); }
.card-thumb { height: 80px; background: linear-gradient(135deg, rgba(99,102,241,0.35), rgba(34,211,238,0.25)); }
.card-info { padding: 10px; }

/* Folder Tree */
.folder-tree { display: grid; gap: 8px; margin-bottom: 12px; }
.folder-item { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.folder-item.active { color: var(--text); }
.asset-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 10px; }
.asset-item { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06); border-radius: 10px; padding: 10px; display: flex; align-items: center; gap: 8px; }
.asset-icon { width: 30px; height: 30px; display: grid; place-items: center; background: rgba(99,102,241,0.15); border-radius: 8px; }

/* Blueprint Canvas */
.blueprint-canvas { position: relative; height: 160px; background: repeating-linear-gradient(0deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 24px), repeating-linear-gradient(90deg, rgba(255,255,255,0.04) 0 1px, transparent 1px 24px); border-radius: 12px; border: 1px solid rgba(255,255,255,0.06); }
.bp-node { position: absolute; top: 30px; padding: 8px 12px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); border-radius: 10px; }
.bp-node.input { left: 16px; }
.bp-node.function { left: 44%; top: 60px; }
.bp-node.output { right: 16px; top: 30px; }
.bp-connection { position: absolute; top: 64px; left: 130px; right: 115px; height: 2px; background: linear-gradient(90deg, var(--accent), var(--primary)); filter: drop-shadow(0 0 8px rgba(34,211,238,0.35)); }
.ai-explanation { margin-top: 12px; color: var(--muted); }

/* AI Blueprint Demo UI */
.ai-blueprint-demo .demo-toolbar { display: flex; justify-content: flex-end; margin-bottom: 10px; }
.tabs { display: inline-flex; gap: 8px; padding: 6px; border-radius: 12px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06); }
.tab { padding: 8px 12px; border-radius: 10px; background: transparent; color: var(--muted); border: 1px solid transparent; cursor: pointer; font-weight: 600; }
.tab.active { background: rgba(255,255,255,0.06); color: var(--text); border-color: rgba(255,255,255,0.12); box-shadow: 0 6px 16px rgba(0,0,0,0.12) inset; }

.prompt-bar { display: grid; grid-template-columns: 1fr auto; grid-template-areas: 'input actions' 'chips actions'; gap: 10px; align-items: center; margin: 12px 0; }
.prompt-input { grid-area: input; display: flex; align-items: center; gap: 8px; padding: 10px 12px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06); border-radius: 12px; color: var(--muted); }
.prompt-input i { color: var(--accent); }
.prompt-input input { background: transparent; border: none; outline: none; color: var(--text); width: 100%; font-size: 14px; }
.chip-group { grid-area: chips; display: flex; flex-wrap: wrap; gap: 8px; }
.chip { padding: 6px 10px; border-radius: 999px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); color: var(--muted); cursor: pointer; font-size: 12px; }
.chip:hover { color: var(--text); border-color: rgba(255,255,255,0.18); }
.actions { grid-area: actions; display: flex; gap: 10px; }

.demo-views { position: relative; margin-top: 8px; }
.view-canvas, .view-code { display: none; }
.view-canvas.active, .view-code.active { display: block; }
.code-view { background: rgba(0,0,0,0.35); border: 1px solid rgba(255,255,255,0.06); border-radius: 12px; padding: 12px; color: #e6ecff; min-height: 160px; overflow: auto; }

/* Progressive reveal for nodes */
#bp-canvas .bp-node, #bp-canvas .bp-connection { transition: opacity .28s ease, transform .28s ease, filter .28s ease; }
#bp-canvas .hidden { opacity: 0; transform: translateY(6px) scale(0.98); filter: blur(2px); }
#bp-canvas .show { opacity: 1; transform: translateY(0) scale(1); filter: none; }

@media (max-width: 680px) {
  .prompt-bar { grid-template-columns: 1fr; grid-template-areas: 'input' 'chips' 'actions'; }
  .actions { justify-content: stretch; }
  .actions .btn-primary, .actions .btn-secondary { width: 100%; }
}

/* AI Blueprint Demo - progressive reveal */
.ai-blueprint-demo .bp-node,
.ai-blueprint-demo .bp-connection {
  transition: opacity .35s ease, transform .35s ease, filter .35s ease;
  will-change: opacity, transform, filter;
}
.ai-blueprint-demo .bp-node.hidden {
  opacity: 0;
  transform: translateY(6px) scale(.98);
  filter: blur(2px);
}
.ai-blueprint-demo .bp-node.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: none;
}
.ai-blueprint-demo .bp-connection.hidden { opacity: 0; }
.ai-blueprint-demo .bp-connection.show { opacity: 1; }

/* 移动端优化：预览窗口与导航栏 */
@media (max-width: 900px) {
  .preview-window { transform: none; }
  .preview-dashboard { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .preview-dashboard .project-grid { grid-template-columns: repeat(4, 56px); gap: 10px; }
  .preview-dashboard .project-card { width: 56px; min-width: 56px; }
}

@media (max-width: 480px) {
  .nav-container { padding: 0 16px; height: 72px; }
  .nav-menu { top: 72px; }
}

/* 移动端隐藏特定div元素 */
@media (max-width: 700px) {
  .preview-window,
  .feature-demo.ai-blueprint-demo,
  .feature-demo.project-demo,
  .feature-demo.blueprint-demo,
  .feature-demo.ai-demo,
  .feature-demo.community-demo,
  .feature-visual {
    display: none !important;
  }

  /* 移动端problems-grid单列布局 */
  .problems-grid {
    grid-template-columns: 1fr !important;
    gap: 16px;
  }

  /* 移动端feature-block优化：feature-content占满宽度 */
  .feature-block {
    grid-template-columns: 1fr !important;
    gap: 0 !important;
  }

  .feature-content {
    width: 100% !important;
    max-width: none !important;
  }

  /* 移动端pricing-card文字居中 */
  .pricing-card {
    text-align: center !important;
  }

  .pricing-card .card-features {
    text-align: center !important;
  }

  .pricing-card .feature-item {
    justify-content: center !important;
  }

  .pricing-card .price {
    justify-content: center !important;
  }
}

/* ========== PC端现代化动效与交互 ========== */
@media (min-width: 701px) {
  /* 全局滚动进度条 */
  .scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    z-index: 9999;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 10px rgba(99,102,241,0.5);
  }

  /* 导航栏滚动阴影效果 */
  .navbar.scrolled {
    background: linear-gradient(180deg, rgba(15,17,23,0.95), rgba(15,17,23,0.85));
    box-shadow: 0 8px 32px rgba(0,0,0,0.25);
    backdrop-filter: saturate(140%) blur(12px);
  }

  /* 导航链接悬停下划线动画 */
  .nav-link {
    position: relative;
    overflow: hidden;
  }
  
  .nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.3s ease-out;
  }
  
  .nav-link:hover::before {
    width: 100%;
  }
  
  .nav-link:hover {
    transform: translateY(-1px);
    color: var(--text-strong);
  }

  /* 按钮悬停增强动效 */
  .btn-primary, .cta-button {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
  }
  
  .btn-primary:hover, .cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(99,102,241,0.4);
  }
  
  .btn-secondary:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.2);
    background: var(--glass-bg);
  }

  /* 卡片3D倾斜交互效果 */
  .pricing-card,
  .problem-card,
  .market-feature-card,
  .project-card,
  .feature-block {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
  }
  
  .pricing-card:hover,
  .problem-card:hover,
  .market-feature-card:hover {
    transform: translateY(-8px) rotateX(5deg) rotateY(-2deg);
    box-shadow: 0 25px 50px rgba(0,0,0,0.4);
  }
  
  .project-card:hover {
    transform: translateY(-6px) rotateX(3deg) rotateY(-1deg);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
  }
  
  .feature-block:hover {
    transform: translateY(-4px) rotateX(2deg);
    box-shadow: 0 20px 60px rgba(99,102,241,0.15);
  }

  /* 特色卡片增强倾斜 */
  .pricing-card.featured:hover {
    transform: translateY(-10px) rotateX(6deg) rotateY(-3deg);
    box-shadow: 0 30px 80px rgba(99,102,241,0.35);
  }
  
  .feature-block.highlight:hover {
    transform: translateY(-6px) rotateX(3deg);
    box-shadow: 0 25px 80px rgba(99,102,241,0.25);
  }

  /* 点击涟漪效果 */
  .ripple-effect {
    position: relative;
    overflow: hidden;
  }
  
  .ripple-effect::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: scale(0);
    pointer-events: none;
    opacity: 0;
  }
  
  .ripple-effect.rippling::after {
    animation: ripple 0.6s linear;
  }
  
  @keyframes ripple {
    to {
      transform: scale(4);
      opacity: 0;
    }
  }

  /* 悬停时图标旋转 */
  .problem-icon:hover,
  .feature-icon:hover {
    transform: scale(1.1) rotate(5deg);
    transition: transform 0.3s ease;
  }

  /* 统计卡片悬停效果 */
  .stat-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0,0,0,0.25);
  }

  /* 路线图时间轴悬停 */
  .timeline-item:hover .timeline-content {
    transform: translateX(8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }

  /* 成就项悬停动画 */
  .achievement-item:hover {
    transform: translateY(-2px) scale(1.05);
    background: linear-gradient(180deg, rgba(99,102,241,0.1), rgba(99,102,241,0.05));
  }

  /* 导航品牌悬停效果 */
  .logo-container:hover .brand-text {
    color: var(--primary);
    text-shadow: 0 0 20px rgba(99,102,241,0.6);
  }

  /* 版本启动按钮悬停 */
  .version-launch:hover {
    transform: translateY(-1px) scale(1.05);
    box-shadow: 0 8px 20px rgba(34,211,238,0.4);
  }

  /* 芯片悬停效果 */
  .chip:hover {
    transform: translateY(-1px);
    background: rgba(99,102,241,0.15);
    border-color: rgba(99,102,241,0.35);
  }

  /* 预览窗口悬停深度增强 */
  .preview-window:hover {
    transform: rotateY(-10deg) rotateX(3deg) translateY(-4px);
    box-shadow: 0 30px 80px rgba(0,0,0,0.4);
  }

  /* CTA区域悬停 */
  .cta-content:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 60px rgba(0,0,0,0.2);
  }

  /* 浮动动画增强 */
  .animate-float {
    animation: enhancedFloat 8s ease-in-out infinite;
  }
  
  @keyframes enhancedFloat {
    0%, 100% { 
      transform: translateY(0) rotateY(-8deg) rotateX(2deg); 
    }
    25% { 
      transform: translateY(-8px) rotateY(-7deg) rotateX(1deg); 
    }
    50% { 
      transform: translateY(-4px) rotateY(-9deg) rotateX(3deg); 
    }
    75% { 
      transform: translateY(-12px) rotateY(-6deg) rotateX(2deg); 
    }
  }

  /* 磁性按钮效果 */
  .magnetic-btn {
    transition: transform 0.2s ease-out;
  }

  /* 页面加载时的元素入场动画增强 */
  .animate-on-scroll {
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* 滚动视差效果 */
  .parallax-bg {
    will-change: transform;
  }

  /* 鼠标跟随光晕效果 */
  .cursor-glow {
    position: fixed;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, transparent 70%);
    pointer-events: none;
    border-radius: 50%;
    z-index: -1;
    transition: opacity 0.3s ease;
    opacity: 0;
  }

  .cursor-glow.active {
    opacity: 1;
  }
}