/* ====== 主题变量 ====== */
:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-border: #e2e8f0;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-accent: #06b6d4;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-text: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-border: #334155;
    --color-shadow: rgba(0, 0, 0, 0.3);
  }
}

/* ====== 基础重置 ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ====== 导航栏 ====== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--color-primary); }

/* ====== 下拉菜单 ====== */
.nav-dropdown {
  position: relative;
  cursor: pointer;
  user-select: none;
}
.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-dropdown-trigger:hover { color: var(--color-primary); background: var(--color-bg); }
.nav-dropdown-trigger .arrow { font-size: 0.65rem; transition: transform var(--transition); }
.nav-dropdown.open .nav-dropdown-trigger .arrow { transform: rotate(180deg); }
.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px var(--color-shadow);
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.15s ease;
  z-index: 1010;
}
.nav-dropdown.open .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  transition: all var(--transition);
}
.nav-dropdown-menu a:first-child { border-radius: var(--radius-sm) var(--radius-sm) 0 0; }
.nav-dropdown-menu a:last-child { border-radius: 0 0 var(--radius-sm) var(--radius-sm); }
.nav-dropdown-menu a:hover { background: var(--color-bg); color: var(--color-primary); }
.nav-dropdown-menu .divider { border-top: 1px solid var(--color-border); margin: 4px 0; }

.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--color-text); }

/* ====== Hero 区 ====== */
#hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 50%, #10b981 100%);
  padding: 120px 24px 80px;
  margin-top: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content { position: relative; z-index: 1; color: #fff; }
.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.hero-subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 40px;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  display: inline-block;
  padding: 12px 32px;
  background: #ffffff;
  color: var(--color-primary);
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }
.btn-outline {
  display: inline-block;
  padding: 12px 32px;
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.5);
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
.btn-sm { padding: 6px 16px; font-size: 0.85rem; }
.btn-danger {
  display: inline-block;
  padding: 6px 16px;
  background: #ef4444;
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 0.85rem;
  cursor: pointer;
}

/* ====== 通用 Section ====== */
.section { padding: 80px 24px; }
.section-alt { background: var(--color-surface); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; margin-bottom: 8px; }
.section-header p { color: var(--color-text-secondary); }

/* ====== 卡片网格 ====== */
.card-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ====== 可用卡片 ====== */
.card-active {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.card-active:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px var(--color-shadow);
  border-color: var(--color-primary);
}

/* ====== 预留卡片 ====== */
.card-placeholder {
  background: var(--color-surface);
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  cursor: default;
  transition: all var(--transition);
  position: relative;
  opacity: 0.6;
}
.card-placeholder:hover { opacity: 0.85; }

.card-icon { font-size: 2.5rem; margin-bottom: 12px; }
.card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.card p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.5; }

/* 状态标签 */
.card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 0.7rem;
  padding: 2px 10px;
  border-radius: 50px;
  font-weight: 600;
}
.card-badge.active { background: #d1fae5; color: #065f46; }
.card-badge.reserved { background: #fef3c7; color: #92400e; }

/* ====== Claude Code 弹窗 ====== */
.modal { position: fixed; inset: 0; z-index: 2000; }
.modal.hidden { display: none; }
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
}
.modal-container {
  position: relative;
  max-width: 900px;
  width: 95%;
  height: 85vh;
  margin: 40px auto 0;
  background: var(--color-surface);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.3);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
}
.modal-close {
  background: none; border: none;
  font-size: 1.5rem; cursor: pointer;
  color: var(--color-text-secondary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}
.modal-close:hover { background: var(--color-border); }
.modal-body { flex: 1; padding: 24px; overflow: hidden; display: flex; flex-direction: column; }

/* 登录表单 */
#cc-login-form { max-width: 360px; margin: 0 auto; padding-top: 40px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 0.9rem; }
.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition);
}
.form-group input:focus { outline: none; border-color: var(--color-primary); }
#cc-login-btn { width: 100%; }
.form-error { color: #ef4444; font-size: 0.85rem; margin-top: 12px; text-align: center; }
.hidden { display: none !important; }

/* 登录区域 */
#cc-login-section {
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 终端区域 */
#cc-terminal-section {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 400px;
}
.terminal-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0 12px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}
.terminal-toolbar .btn-primary { margin-left: auto; }
#cc-terminal-container {
  flex: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  min-height: 350px;
}
#cc-terminal-container .xterm {
  height: 100%;
  padding: 8px;
}

/* ====== 页脚 ====== */
#footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 48px 24px 24px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-col h4 { margin-bottom: 12px; }
.footer-col a { display: block; color: var(--color-text-secondary); font-size: 0.9rem; padding: 4px 0; }
.footer-col a:hover { color: var(--color-primary); }
.footer-col p { color: var(--color-text-secondary); font-size: 0.9rem; }
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

/* ====== 响应式 ====== */
@media (max-width: 900px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .card-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--color-surface); padding: 16px 24px; border-bottom: 1px solid var(--color-border); }
  
/* ====== 下拉菜单 ====== */
.nav-dropdown {
  position: relative;
  cursor: pointer;
  user-select: none;
}
.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-dropdown-trigger:hover { color: var(--color-primary); background: var(--color-bg); }
.nav-dropdown-trigger .arrow { font-size: 0.65rem; transition: transform var(--transition); }
.nav-dropdown.open .nav-dropdown-trigger .arrow { transform: rotate(180deg); }
.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px var(--color-shadow);
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.15s ease;
  z-index: 1010;
}
.nav-dropdown.open .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  transition: all var(--transition);
}
.nav-dropdown-menu a:first-child { border-radius: var(--radius-sm) var(--radius-sm) 0 0; }
.nav-dropdown-menu a:last-child { border-radius: 0 0 var(--radius-sm) var(--radius-sm); }
.nav-dropdown-menu a:hover { background: var(--color-bg); color: var(--color-primary); }
.nav-dropdown-menu .divider { border-top: 1px solid var(--color-border); margin: 4px 0; }

.nav-toggle { display: block; }
  .section { padding: 60px 16px; }
  .modal-container { height: 95vh; margin: 10px auto 0; width: 100%; }
}