:root {
  --primary: #4361ee;
  --primary-dark: #3a56d4;
  --secondary: #3f37c9;
  --success: #4cc9f0;
  --danger: #f72585;
  --warning: #f8961e;
  --info: #4895ef;
  --light: #f8f9fa;
  --dark: #212529;
  --gray: #6c757d;
  --white: #ffffff;
}

* { box-sizing: border-box; }
body {
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: linear-gradient(180deg, #f6f8ff 0%, #f5f7fa 40%, #f5f7fa 100%);
  margin: 0;
}

/* 顶部导航 */
.navbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px; background: rgba(255,255,255,0.8); backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.nav-left { display: flex; align-items: center; gap: 16px; }
.brand { font-weight: 700; color: var(--dark); }
.nav-link { color: #444; text-decoration: none; padding: 8px 10px; border-radius: 8px; }
.nav-link:hover { background: #eef2ff; color: var(--primary); }
.nav-user { display: flex; align-items: center; gap: 12px; }

/* Hero */
.hero {
  text-align: center; padding: 72px 16px 40px;
  background: radial-gradient(1200px 400px at 50% -50%, #dfe4ff, transparent);
}
.hero h1 { font-size: 40px; margin: 0 0 12px; }
.hero p { color: #555; margin: 0 0 20px; }
.hero-cta { display: flex; justify-content: center; gap: 12px; }

/* 布局 */
.container { max-width: 1200px; margin: 0 auto; padding: 20px; }
.content { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
.card {
  background: var(--white); border-radius: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  padding: 22px; transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(0,0,0,0.08); }
.row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.main-col { display: grid; gap: 20px; }
.side-col { display: grid; gap: 20px; }

/* 按钮 */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-weight: 600; border:1px solid transparent; border-radius: 10px;
  padding: 10px 16px; cursor:pointer; transition: all .2s ease;
  background: var(--light);
}
.btn:hover { transform: translateY(-1px); }
.btn-lg { padding: 14px 18px; border-radius: 12px; }
.btn-sm { padding: 8px 12px; border-radius: 8px;}
.btn-block { width: 100%; }
.btn-primary { color:#fff; background:var(--primary); border-color:var(--primary); }
.btn-primary:hover { background:var(--primary-dark); }
.btn-success { color:#fff; background:#22c55e; border-color:#22c55e; }
.btn-outline-success { color:#16a34a; background:#eafaf0; border-color:#bbf7d0; }
.btn-outline-primary { color:#2563eb; background:#eef2ff; border-color:#c7d2fe; }
.btn-secondary { color:#111; background:#e5e7eb; border-color:#e5e7eb; }

/* 表单 */
.form-group { margin-bottom: 12px; }
.form-control {
  width: 100%; padding: 10px 12px; border-radius: 10px;
  border: 1px solid #e5e7eb; outline: none; transition: border .2s ease, box-shadow .2s ease;
  background: #fff;
}
.form-control:focus { border-color: #93c5fd; box-shadow: 0 0 0 4px rgba(147,197,253,.25); }

.text-center { text-align: center; }
.text-muted { color: #6b7280; }
.py-4 { padding: 16px 0; }

/* 列表 */
.feature-list { margin: 0; padding-left: 18px; }
.feature-grid { display:grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px 16px; list-style: none; padding: 0; }
@media (max-width: 960px){ .content{grid-template-columns:1fr;} .feature-grid{grid-template-columns:1fr 1fr;} }

/* 时间线 */
.timeline { list-style:none; padding-left: 0; position:relative; }
.timeline-item { position:relative; padding-left:20px; margin:14px 0; }
.timeline-item::before{
  content:''; position:absolute; left:6px; top:6px; width:8px; height:8px; border-radius:50%; background:#c7d2fe;
}
.timeline-item.active::before{ background:#4ade80; }
.timeline .timeline-content { background:#fff; border:1px solid #eee; border-radius:10px; padding:12px; }

/* 个人中心 */
.membership-card { border-left: 4px solid var(--primary); border-radius: 10px; padding: 12px; margin-bottom: 10px; }
.membership-card.active { border-left-color: #22c55e; }
.badge { font-size: 12px; border-radius: 8px; padding: 4px 8px; }
.bg-success { background:#eafaf0; color:#16a34a; }
.bg-secondary { background:#eef2f7; color:#475569; }

/* Modal */
.modal { position:fixed; inset:0; background: rgba(0,0,0,0.4); display:flex; align-items:center; justify-content:center; padding:20px; }
.modal.hidden { display:none; }
.modal-dialog { width: 100%; max-width: 460px; background:#fff; border-radius:16px; box-shadow: 0 24px 48px rgba(0,0,0,.2); overflow: hidden; }
.modal-header { display:flex; align-items:center; justify-content:space-between; padding: 14px 16px; border-bottom:1px solid #eee;}
.modal-close { border:none; background:transparent; font-size:20px; cursor:pointer; }
.modal-body { padding: 16px; }
.tabs { display:flex; gap:8px; margin-bottom: 12px; }
.tab { flex:1; padding:10px; border-radius: 10px; border:1px solid #e5e7eb; background:#f8fafc; cursor:pointer; }
.tab.active { background:#eef2ff; border-color:#c7d2fe; color:#1d4ed8; }
.tab-panel.hidden { display:none; }
.oauth { margin-top: 14px; }
.oauth-row { display:flex; gap:10px; }

/* Toast */
.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: 24px; min-width: 240px; text-align:center;
  background: rgba(17,24,39,0.92); color:#fff; padding:10px 16px; border-radius:10px;
  opacity:0; pointer-events:none; transition: opacity .25s ease, transform .25s ease;
}
.toast.show { opacity:1; transform: translateX(-50%) translateY(-6px); }



/* Spinner */
.spinner-border {
  width: 34px; height: 34px; border: 3px solid #c7d2fe; border-top-color: transparent; border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 顶部导航：紧凑用户卡片 */
.nav-user-card{
  display:flex; align-items:center; gap:10px;
  padding:8px 10px; border-radius:12px;
  background: rgba(255,255,255,.85);
  border:1px solid rgba(0,0,0,.06);
  box-shadow: 0 6px 18px rgba(0,0,0,.06);
  backdrop-filter: saturate(1.2) blur(6px);
}
.nav-user-avatar{
  width:28px; height:28px; border-radius:50%; object-fit:cover;
  box-shadow: 0 0 0 1px rgba(0,0,0,.05);
}
.nav-user-text{ line-height:1.15; display:flex; flex-direction:column; }
.nav-user-name{ font-weight:600; font-size:14px; color:#111; }
.nav-user-meta{
  display:flex; align-items:center; gap:8px;
  font-size:12px; color:#6b7280; white-space:nowrap;
}
.nav-user-expire{ opacity:.9; }
.nav-user-badge{
  display:inline-flex; align-items:center; gap:4px;
  padding:2px 6px; border-radius:999px; font-weight:600;
  border:1px solid transparent;
}
.nav-user-badge.active{ color:#15803d; background:#ecfdf5; border-color:#bbf7d0; }
.nav-user-badge.muted{ color:#475569; background:#eef2f7; border-color:#e5e7eb; }

/* 更轻的“退出”按钮 */
.btn-ghost{
  background: transparent; border-color: rgba(0,0,0,.08); color:#374151;
}
.btn-ghost:hover{ background:#f3f4f6; }

/* 让右上角看起来更靠边、更不突兀 */
.nav-right{ display:flex; align-items:center; justify-content:flex-end; min-width:220px; }
@media (max-width: 640px){
  .nav-user-card{ padding:6px 8px; }
  .nav-user-name{ font-size:13px; }
  .nav-user-meta{ font-size:11px; }
  .nav-right{ min-width:auto; }
}