:root {
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --indigo-500: #6366f1;
  --indigo-600: #4f46e5;

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --surface: #ffffff;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --border: #e4e9f2;
  --shadow-sm: 0 1px 4px rgba(37, 99, 235, 0.06);
  --shadow-md: 0 4px 16px rgba(37, 99, 235, 0.1);
  --radius: 10px;
  --radius-lg: 14px;
  --transition: 0.2s ease;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Consolas, monospace;
}

.account-row.is-hidden { display: none !important; }

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}
body.locked { overflow: hidden; }

/* 首屏前根据 localStorage 隐藏入场弹窗，避免 defer 脚本加载前闪一下 */
html.entry-confirmed #entryModal { display: none !important; }
html:not(.entry-confirmed) body { overflow: hidden; }

.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 960px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 56px; padding: 0 24px;
}
.logo-text { font-size: 1.05rem; font-weight: 700; color: var(--gray-800); }
.logo-accent { color: var(--blue-600); }
.nav-links { display: flex; gap: 2px; }
.nav-link {
  font-size: 0.84rem; font-weight: 500; color: var(--text-secondary);
  padding: 5px 12px; border-radius: 6px; transition: all var(--transition);
  text-decoration: none;
}
.nav-link:hover, .nav-link.active { color: var(--blue-600); background: var(--blue-50); }

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--blue-50) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  padding: 48px 0 40px;
  text-align: center;
}
.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800; line-height: 1.25;
  margin-bottom: 12px; letter-spacing: -0.5px;
}
.gradient-text {
  background: linear-gradient(135deg, var(--blue-500) 0%, var(--indigo-600) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 0.92rem; color: var(--text-secondary);
  max-width: 520px; margin: 0 auto 20px;
}
.stats-row {
  display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
  margin-top: 8px;
}
.stat-chip {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 50px; padding: 6px 16px;
  font-size: 0.8rem; color: var(--text-secondary);
}
.stat-chip strong { color: var(--blue-600); font-weight: 700; }

/* Accounts */
.accounts-section { padding: 36px 0 20px; }
.section-bar { margin-bottom: 16px; }
.section-title { font-size: 1.15rem; font-weight: 700; color: var(--gray-800); }
.section-subtitle { font-size: 0.82rem; color: var(--text-secondary); margin-top: 4px; }

.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.filter-btn {
  padding: 5px 14px; border: 1px solid var(--border);
  border-radius: 50px; background: var(--surface);
  color: var(--text-secondary); font-size: 0.8rem;
  font-family: var(--font-sans); font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--blue-400); color: var(--blue-600); }
.filter-btn.active { border-color: var(--blue-500); color: #fff; background: var(--blue-500); }

.accounts-list { display: flex; flex-direction: column; gap: 10px; min-height: 80px; }

.account-row {
  display: grid;
  grid-template-columns: 44px 1fr 1fr 100px;
  gap: 12px; align-items: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 18px;
  transition: all var(--transition);
  animation: fadeUp 0.35s ease backwards;
}
.account-row:hover {
  border-color: var(--blue-300, var(--blue-200));
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.account-row.offline { opacity: 0.55; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.row-flag { font-size: 1.6rem; text-align: center; line-height: 1; }
.row-field { min-width: 0; }
.row-field-label {
  font-size: 0.65rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 1px; color: var(--text-secondary); margin-bottom: 3px;
}
.row-field-value {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 10px; background: var(--gray-50);
  border: 1px solid var(--gray-200); border-radius: 6px;
  cursor: pointer; transition: all var(--transition);
  font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--gray-700);
  min-width: 0;
}
.row-field-value span {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.row-field-value:hover { border-color: var(--blue-400); background: var(--blue-50); }
.row-field-value:active { transform: scale(0.98); }
.copy-icon { flex-shrink: 0; color: var(--gray-400); }

.row-meta {
  display: flex; flex-direction: column; align-items: flex-end; gap: 4px;
}
.row-status {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 50px;
  font-size: 0.68rem; font-weight: 600;
  background: #ecfdf5; color: #059669;
}
.row-status.offline { background: #fef2f2; color: #dc2626; }
.row-status-dot { width: 5px; height: 5px; background: currentColor; border-radius: 50%; }
.row-region { font-size: 0.7rem; color: var(--text-secondary); font-weight: 500; }
.row-time { font-size: 0.65rem; color: var(--gray-400); }

.empty-state, .error-banner {
  text-align: center; padding: 32px 16px;
  color: var(--text-secondary); font-size: 0.9rem;
}
.error-banner {
  background: #fef2f2; border: 1px solid #fecaca;
  border-radius: var(--radius); color: #b91c1c; margin-bottom: 16px;
  text-align: left; padding: 12px 16px; font-size: 0.82rem;
}

.update-info {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; margin-top: 20px; font-size: 0.78rem; color: var(--text-secondary);
}
.refresh-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border: 1px solid var(--border);
  border-radius: 6px; background: var(--surface);
  color: var(--text-secondary); cursor: pointer;
  transition: all var(--transition);
}
.refresh-btn:hover { border-color: var(--blue-400); color: var(--blue-600); }
.refresh-btn.spinning svg { animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Guide */
.guide-section {
  padding: 48px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.steps-timeline {
  display: flex; gap: 0; position: relative;
  overflow-x: auto; padding-bottom: 8px;
}
.step-item {
  flex: 1; min-width: 180px; text-align: center;
  position: relative; padding: 0 12px;
}
.step-item:not(:last-child)::after {
  content: ''; position: absolute;
  top: 22px; height: 2px; background: var(--blue-200);
  left: calc(50% + 22px); width: calc(100% - 44px);
}
.step-circle {
  width: 44px; height: 44px; margin: 0 auto 12px;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--blue-50); border: 2px solid var(--blue-200);
  font-size: 1.2rem;
}
.step-num { font-size: 0.65rem; font-weight: 700; color: var(--blue-500); letter-spacing: 1px; margin-bottom: 4px; }
.step-content h3 { font-size: 0.9rem; font-weight: 600; margin-bottom: 4px; }
.step-content p { font-size: 0.78rem; color: var(--text-secondary); }

/* FAQ */
.faq-section { padding: 48px 0; }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.faq-item {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: var(--surface);
}
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px; cursor: pointer; font-size: 0.86rem; font-weight: 500;
  user-select: none;
}
.faq-question:hover { background: var(--gray-50); }
.faq-arrow { color: var(--gray-400); transition: transform var(--transition); font-size: 1.1rem; }
.faq-item.open .faq-arrow { transform: rotate(90deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-item.open .faq-answer { max-height: 200px; }
.faq-answer p { padding: 0 16px 14px; font-size: 0.82rem; color: var(--text-secondary); }

/* Footer */
.footer {
  padding: 32px 0; text-align: center;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}
.footer-text { font-size: 0.78rem; color: var(--text-secondary); margin: 8px 0 4px; }
.footer-copyright { font-size: 0.72rem; color: var(--gray-400); }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(15, 23, 42, 0.5);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  pointer-events: auto;
}
.modal-box {
  background: var(--surface); border-radius: var(--radius-lg);
  padding: 28px; max-width: 420px; width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.modal-icon { font-size: 2rem; text-align: center; margin-bottom: 8px; }
.modal-title { font-size: 1.1rem; font-weight: 700; text-align: center; margin-bottom: 12px; }
.modal-body { font-size: 0.86rem; color: var(--text-secondary); }
.modal-body ul { margin: 10px 0 10px 18px; }
.modal-body li { margin-bottom: 6px; }
.modal-warning { color: #dc2626; font-size: 0.8rem; margin-top: 10px; }
.modal-btn {
  display: block; width: 100%; margin-top: 16px;
  padding: 10px; border: none; border-radius: 8px;
  background: var(--blue-600); color: #fff;
  font-size: 0.9rem; font-weight: 600; cursor: pointer;
  transition: background var(--transition);
}
.modal-btn:hover { background: var(--blue-700); }
.modal-actions { display: flex; gap: 10px; margin-top: 16px; }
.modal-btn-cancel { background: var(--gray-100); color: var(--gray-700); flex: 1; margin-top: 0; }
.modal-btn-confirm { flex: 1; margin-top: 0; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(80px);
  display: flex; align-items: center; gap: 8px;
  background: var(--gray-800); color: #fff;
  padding: 10px 18px; border-radius: 50px;
  font-size: 0.84rem; font-weight: 500;
  opacity: 0; transition: all 0.3s ease; z-index: 2000;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .header-inner { padding: 0 16px; }
  .hero { padding: 32px 0 28px; }
  .stats-row { gap: 8px; }
  .stat-chip { padding: 5px 12px; font-size: 0.75rem; }

  .account-row {
    grid-template-columns: 40px 1fr;
    grid-template-rows: auto auto auto;
    gap: 8px 10px;
    padding: 12px 14px;
  }

  /* 国旗占左侧两行，账号/密码各占右侧一行 */
  .row-flag {
    grid-column: 1;
    grid-row: 1 / 3;
    align-self: center;
    font-size: 1.4rem;
  }
  .account-row .row-field:nth-child(2) {
    grid-column: 2;
    grid-row: 1;
  }
  .account-row .row-field:nth-child(3) {
    grid-column: 2;
    grid-row: 2;
  }
  .row-meta {
    grid-column: 1 / -1;
    grid-row: 3;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding-top: 4px;
    border-top: 1px solid var(--gray-100);
    margin-top: 2px;
  }

  .row-field-value {
    font-size: 0.78rem;
    padding: 8px 10px;
  }

  .faq-grid { grid-template-columns: 1fr; }
 


 /* 使用教程：手机端纵向排列，不横向滑动 */
  .guide-section {
    padding: 32px 0;
    overflow-x: hidden;
  }

  .steps-timeline {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 0;
  }

  .step-item {
    flex: none;
    min-width: 0;
    width: 100%;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    text-align: left;
    padding: 0 0 28px 4px;
  }

  .step-item:last-child {
    padding-bottom: 0;
  }

  .step-item:not(:last-child)::after {
    top: 48px;
    left: 25px;
    width: 2px;
    height: calc(100% - 28px);
    transform: none;
  }

  .step-circle {
    flex-shrink: 0;
    margin: 0;
    width: 44px;
    height: 44px;
  }

  .step-content {
    flex: 1;
    min-width: 0;
    padding-top: 2px;
  }

  .step-content h3 {
    font-size: 0.92rem;
  }

  .step-content p {
    font-size: 0.8rem;
    line-height: 1.55;
  }
}