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

/* hidden 属性兜底 */
[hidden] {
  display: none !important;
}

:root {
  --bg-primary:    #0F1117;
  --bg-secondary:  #161922;
  --bg-tertiary:   #1E2230;
  --bg-elevated:   #252A3A;
  --border-subtle: #2A2F3E;
  --border-strong: #3A4055;
  --text-primary:   #FFFFFF;
  --text-secondary: #B8BECC;
  --text-muted:     #6B7280;
  --text-disabled:  #4B5563;
  --brand-primary: #6366F1;
  --brand-hover:   #7C7FF5;
  --brand-active:  #4F46E5;
  --brand-subtle:  #312E81;
  --gradient-primary:  linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  --gradient-success:  linear-gradient(135deg, #10B981 0%, #34D399 100%);
  --gradient-warning:  linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);
  --gradient-danger:   linear-gradient(135deg, #EF4444 0%, #F87171 100%);
  --success: #10B981;
  --warning: #F59E0B;
  --danger:  #EF4444;
  --info:    #3B82F6;
  --shadow-sm:   0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:   0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg:   0 8px 30px rgba(0,0,0,0.5);
  --glow-brand:  0 0 20px rgba(99,102,241,0.3);
  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --weight-normal:   400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 9999px;
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --bg: var(--bg-primary);
  --bg-soft: var(--bg-secondary);
  --card: var(--bg-tertiary);
  --card-hover: var(--bg-elevated);
  --border: var(--border-subtle);
  --text: var(--text-primary);
  --text-dim: var(--text-secondary);
  --primary: var(--brand-primary);
  --primary-hover: var(--brand-hover);
  --primary-glow: rgba(99, 102, 241, 0.35);
  --error: var(--danger);
  --radius: var(--radius-lg);
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============ 页脚 ============ */
.site-footer {
  margin-top: 40px;
  padding: 20px 24px 24px;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-soft);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--text-sm);
}
.footer-copy { color: var(--text-muted); }
.footer-icp {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-icp:hover { color: var(--brand-hover); text-decoration: underline; }
.site-footer .lang-btn { font-size: var(--text-sm); }
.site-footer .lang-panel {
  top: auto;
  bottom: calc(100% + 8px);
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 60px;
  background: var(--bg-primary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.header-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glow-brand);
}
.header-logo-text {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-4);
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.nav-link:hover,
.nav-link.open { background: var(--brand-subtle); color: var(--text-primary); }
.nav-caret { font-size: 10px; opacity: 0.7; transition: transform 0.2s; }
.nav-link.open .nav-caret { transform: rotate(180deg); }

.header-dropdown { position: relative; }
.header-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 560px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  display: none;
  z-index: 60;
}
.header-dropdown.open .header-panel { display: grid; }
.tool-panel {
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.tool-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-2);
  border-radius: var(--radius-lg);
}
.tool-group:hover { background: var(--bg-tertiary); }
.tool-group-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0 var(--space-2) var(--space-2);
}
.tool-link {
  display: block;
  padding: 8px var(--space-2);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.tool-link:hover { background: var(--brand-subtle); color: var(--text-primary); }
.tool-link.tool-all {
  margin-top: var(--space-1);
  color: var(--brand-hover);
  font-weight: var(--weight-medium);
}

.header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.lang-dropdown { position: relative; }
.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.lang-btn:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.lang-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 150px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  display: none;
  z-index: 60;
}
.lang-dropdown.open .lang-panel { display: block; }
.lang-item {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.lang-item:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.lang-item.active { color: var(--brand-hover); font-weight: var(--weight-semibold); }
.lang-item.coming { color: var(--text-disabled); cursor: not-allowed; }
.lang-item.coming:hover { background: transparent; color: var(--text-disabled); }
.lang-coming {
  font-style: normal;
  font-size: 10px;
  padding: 1px 6px;
  margin-left: 6px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-muted);
}

.header-account {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.account-state { display: none; align-items: center; gap: var(--space-2); }
.account-state.show { display: flex; }

.btn-ghost {
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: all 0.2s;
}
.btn-ghost:hover { border-color: var(--brand-hover); color: var(--text-primary); }

.btn-primary {
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: filter 0.2s, transform 0.2s;
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }

.pro-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--gradient-success);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}

.user-dropdown { position: relative; }
.user-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px 4px 4px;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  cursor: pointer;
  transition: background 0.2s;
}
.user-trigger:hover { background: var(--bg-tertiary); }
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
}
.user-name {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  max-width: 90px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.user-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  display: none;
  z-index: 60;
}
.user-dropdown.open .user-panel { display: block; }
.user-menu-item {
  display: block;
  width: 100%;
  padding: 9px 12px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.user-menu-item:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.user-menu-item.danger { color: var(--danger); }
.user-menu-item.danger:hover { background: rgba(239, 68, 68, 0.12); }

.app {
  display: flex;
  min-height: calc(100vh - 60px);
  flex: 1;
}

/* ---------- 侧边栏 ---------- */
.sidebar {
  width: 240px;
  background: var(--bg-soft);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  flex-shrink: 0;
  overflow-y: auto;
  scrollbar-width: thin;
}

.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb {
  background: rgba(99, 102, 241, 0.25);
  border-radius: 3px;
}
.sidebar::-webkit-scrollbar-thumb:hover { background: rgba(99, 102, 241, 0.45); }

.nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: var(--text-dim);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
}

.nav-item:hover {
  background: rgba(99, 102, 241, 0.08);
  color: var(--text);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.18), rgba(139, 92, 246, 0.12));
  color: var(--text);
  box-shadow: inset 3px 0 0 var(--primary);
}

.nav-icon { font-size: 18px; }

.sidebar-footer {
  padding-top: 16px;
  margin-top: auto;
}
.privacy-note {
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(52, 211, 153, 0.08);
  border: 1px solid rgba(52, 211, 153, 0.2);
  border-radius: 10px;
  padding: 10px 12px;
  line-height: 1.6;
}

/* ---------- 主区域 ---------- */
.main {
  flex: 1;
  padding: 40px 48px;
  max-width: 860px;
}

h1 { font-size: 26px; margin-bottom: 6px; }
.subtitle { color: var(--text-dim); margin-bottom: 28px; font-size: 14px; }

.panel { display: none; }
.panel.active { display: block; animation: fadeIn 0.25s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

/* ---------- 上传区 ---------- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: rgba(255, 255, 255, 0.02);
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.06);
  box-shadow: 0 0 0 4px var(--primary-glow);
}

.dz-icon { font-size: 40px; margin-bottom: 12px; }
.dropzone p { font-size: 15px; }
.dz-hint { color: var(--text-dim); font-size: 13px !important; margin-top: 6px; }

/* ---------- 参数 ---------- */
.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.opt { display: flex; flex-direction: column; gap: 6px; }
.opt span { font-size: 13px; color: var(--text-dim); }

select, input[type="text"] {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

select:focus, input[type="text"]:focus {
  border-color: var(--primary);
}

.tip {
  margin: 18px 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.25);
  color: #fcd34d;
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 文件列表 ---------- */
.file-list {
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
}

.file-item .fname {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-item .fsize { color: var(--text-dim); flex-shrink: 0; }

.file-item .fnum {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.file-item .fdel {
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 16px;
  padding: 2px 6px;
  border-radius: 6px;
  flex-shrink: 0;
}

.file-item .fdel:hover { color: var(--error); background: rgba(248, 113, 113, 0.1); }

.file-item.dragging { opacity: 0.4; }

/* ---------- 按钮 ---------- */
.btn-convert {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 6px 18px var(--primary-glow);
  margin-top: 8px;
}

.btn-convert:hover:not(:disabled) { filter: brightness(1.1); transform: translateY(-1px); }
.btn-convert:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-convert.loading::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  margin-right: 10px;
  vertical-align: -3px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 结果区 ---------- */
.result-area { margin-top: 24px; }

.result-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  animation: fadeIn 0.3s ease;
}

.result-card.success { border-color: rgba(52, 211, 153, 0.4); }
.result-card.error { border-color: rgba(248, 113, 113, 0.4); }

.result-icon { font-size: 28px; }

.result-info { flex: 1; }
.result-title { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.result-desc { font-size: 13px; color: var(--text-dim); }

.btn-download {
  padding: 10px 22px;
  border: none;
  border-radius: 8px;
  background: var(--success);
  color: #06281c;
  font-size: 14px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-block;
}

.btn-download:hover { filter: brightness(1.1); }

/* ---------- 用户状态卡 ---------- */
.user-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 12px;
}

.user-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.user-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(93, 100, 120, 0.25);
  color: var(--text-dim);
  letter-spacing: 0.5px;
}

.user-badge.paid { background: rgba(99, 102, 241, 0.18); color: var(--primary); }
.user-badge.member {
  background: linear-gradient(135deg, rgba(251, 191, 36, 0.25), rgba(248, 113, 113, 0.2));
  color: #fcd34d;
}

.user-expire { font-size: 11px; color: var(--text-dim); }

.user-row {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-dim);
  padding: 4px 0;
}

.user-row b { color: var(--text); font-weight: 600; }

.user-note {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
  line-height: 1.6;
}

.btn-upgrade {
  width: 100%;
  margin-top: 10px;
  padding: 9px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-upgrade:hover { filter: brightness(1.1); }

.user-account {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.btn-login {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--primary);
  background: transparent;
  color: var(--primary);
  border-radius: 8px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-login:hover { background: var(--primary); color: #fff; }

.user-logged {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text);
}

.user-phone { font-weight: 600; color: var(--primary); }

.user-logout { color: var(--text-dim); text-decoration: none; }
.user-logout:hover { color: #e25555; }

.btn-try-free {
  width: 100%;
  margin-top: 16px;
  padding: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  font-family: inherit;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-try-free:hover { color: var(--text); border-color: var(--primary); }

/* ---------- 预览卡 ---------- */
.preview-area { margin-top: 16px; }

.preview-loading {
  background: var(--bg-soft);
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}

.preview-loading.error { color: var(--error); border-color: rgba(248, 113, 113, 0.35); }

.preview-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  gap: 16px;
  align-items: center;
  animation: fadeIn 0.25s ease;
}

.preview-thumbs {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.preview-thumbs img {
  height: 110px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  object-fit: contain;
}

.preview-empty {
  width: 80px;
  height: 110px;
  border-radius: 6px;
  border: 1px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 12px;
}

.preview-meta { min-width: 0; }
.preview-name {
  font-size: 14px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 8px;
}
.preview-stats { display: flex; gap: 14px; font-size: 13px; color: var(--text-dim); }

.preview-warn {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.35);
  color: var(--text);
}

.preview-warn.ok {
  background: rgba(52, 211, 153, 0.1);
  border-color: rgba(52, 211, 153, 0.35);
}

/* ---------- 进度条（保留流动画） ---------- */
.progress-area {
  margin-top: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px;
  animation: fadeIn 0.25s ease;
}

.progress-track {
  height: 10px;
  border-radius: 6px;
  background: var(--bg-soft);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--primary), #8b5cf6, #34d399);
  background-size: 200% 100%;
  transition: width 0.4s ease;
  animation: progressFlow 2s linear infinite;
}

@keyframes progressFlow {
  from { background-position: 0% 0; }
  to { background-position: 200% 0; }
}

.progress-text {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-dim);
  text-align: center;
}

/* ---------- 付费弹窗 ---------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 22, 0.72);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal-mask[hidden] { display: none; }

.modal {
  width: min(720px, 94vw);
  max-height: 90vh;
  overflow-y: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.modal-head h2 { font-size: 20px; margin: 0; }

.modal-close {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 18px;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 8px;
}

.modal-close:hover { color: var(--text); background: var(--bg-soft); }

.modal-sub { color: var(--text-dim); font-size: 13px; margin-bottom: 20px; }

.pay-login-hint {
  margin-bottom: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px dashed rgba(34, 197, 94, 0.45);
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.6;
}

.pay-login-hint a { color: var(--primary); font-weight: 600; text-decoration: none; }
.pay-login-hint a:hover { text-decoration: underline; }

.pay-free-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.3);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 18px;
}

.pay-free-hint.warn {
  background: rgba(251, 191, 36, 0.1);
  border-color: rgba(251, 191, 36, 0.35);
}

.pay-free-hint.ok {
  background: rgba(96, 165, 250, 0.1);
  border-color: rgba(96, 165, 250, 0.35);
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.plan-card {
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 18px;
  transition: all 0.2s;
}

.plan-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.1), var(--bg-soft));
}

.plan-badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 20px;
  white-space: nowrap;
}

.plan-name { font-size: 14px; font-weight: 700; margin-bottom: 8px; }

.plan-price {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.plan-price strong {
  font-size: 30px;
  color: var(--text);
  font-weight: 800;
  margin: 0 2px;
}

.plan-price span { font-size: 12px; }

.plan-saving {
  font-size: 11px;
  color: #fcd34d;
  background: rgba(251, 191, 36, 0.1);
  border-radius: 6px;
  padding: 3px 8px;
  display: inline-block;
  margin-bottom: 8px;
}

.plan-card ul {
  list-style: none;
  font-size: 12.5px;
  color: var(--text-dim);
  margin: 10px 0 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.plan-card li::before { content: "✓ "; color: var(--success); }

.plan-btn {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.plan-card.featured .plan-btn {
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  border: none;
  color: #fff;
}

.plan-btn:hover { filter: brightness(1.12); }

/* 支付确认 */
.order-box {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 8px 0 16px;
}

.order-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 1px dashed var(--border);
}

.order-row:last-child { border-bottom: none; }

.order-row span { color: var(--text-dim); }
.order-row b { font-weight: 600; }
.order-amount { color: #fcd34d; font-size: 16px; }

.order-no { font-size: 12px; color: var(--text-dim); font-weight: 400; }

.pay-method {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}

.pm-icon { font-size: 26px; }
.pm-name { font-size: 14px; font-weight: 600; }
.pm-hint { font-size: 12px; color: var(--text-dim); margin-top: 3px; }

.btn-pay {
  width: 100%;
  padding: 13px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-pay:hover:not(:disabled) { filter: brightness(1.1); }
.btn-pay:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-cancel-pay {
  width: 100%;
  margin-top: 10px;
  padding: 10px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}

.btn-cancel-pay:hover { color: var(--text); }

/* 支付方式选择 */
.pay-methods { margin-bottom: 14px; }
.pay-method-title { font-size: 13px; color: var(--text-dim); margin-bottom: 10px; }
.pm-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.pm-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 6px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-soft);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.pm-item:hover { border-color: var(--primary); }
.pm-item.active {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.12);
  box-shadow: 0 0 0 2px var(--primary-glow);
}
.pm-item-name { font-size: 13px; font-weight: 600; color: var(--text); }
.pm-item-tag { font-size: 11px; color: var(--text-dim); }
.pm-item.active .pm-item-tag { color: var(--primary); }

/* 支付二维码 */
.pay-qr-box { text-align: center; padding: 6px 0 16px; }
.pay-qr-img {
  width: 190px;
  height: 190px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: #fff;
}
.pay-qr-hint { margin-top: 12px; font-size: 13px; font-weight: 600; }
.pay-qr-tip { margin-top: 4px; font-size: 12px; color: var(--text-dim); }

/* ---------- 登录弹窗 ---------- */
.modal-narrow { width: min(420px, 94vw); }

.login-tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.login-tab {
  flex: 1;
  padding: 10px 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary, var(--text));
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}
.login-tab:hover { border-color: var(--primary); color: var(--primary); }
.login-tab.active { background: var(--primary); border-color: var(--primary); color: #fff; }

.login-form { display: flex; flex-direction: column; gap: 12px; }

.login-input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  box-sizing: border-box;
  outline: none;
}

.login-input:focus { border-color: var(--primary); }

.code-row { display: flex; gap: 10px; }
.code-row .login-input { flex: 1; }

.login-captcha {
  display: flex;
  align-items: center;
  gap: 8px;
}
.captcha-question {
  flex-shrink: 0;
  padding: 10px 12px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--primary);
  font-weight: 700;
  font-size: 15px;
  min-width: 96px;
  text-align: center;
}
.captcha-input {
  flex: 1;
  min-width: 0;
  text-align: center;
}
.btn-refresh-captcha {
  flex-shrink: 0;
  width: 42px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text-secondary, var(--text));
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-refresh-captcha:hover { border-color: var(--primary); color: var(--primary); }

.btn-send-code {
  flex-shrink: 0;
  padding: 0 14px;
  border: 1px solid var(--primary);
  background: transparent;
  color: var(--primary);
  border-radius: 10px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-send-code:hover:not(:disabled) { background: var(--primary); color: #fff; }
.btn-send-code:disabled { opacity: 0.6; cursor: not-allowed; }

.login-demo {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(250, 204, 21, 0.12);
  border: 1px dashed rgba(250, 204, 21, 0.5);
  color: #facc15;
  font-size: 12px;
  line-height: 1.6;
}

.login-links {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-top: 2px;
}
.login-links .btn-link {
  background: none;
  border: none;
  padding: 4px 2px;
  color: var(--primary);
  cursor: pointer;
  font-size: 13px;
  text-align: left;
  white-space: nowrap;
}
.login-links .btn-link:hover { text-decoration: underline; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--card);
  border: 1px solid rgba(52, 211, 153, 0.4);
  color: var(--text);
  padding: 12px 22px;
  border-radius: 12px;
  font-size: 14px;
  z-index: 1200;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  animation: toastIn 0.3s ease;
}

.toast.show { display: block; }

@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, -10px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

@media (max-width: 768px) {
  .app { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    padding: 16px;
  }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .main { padding: 24px 16px; }
  .options { grid-template-columns: 1fr; }
  .plan-grid { grid-template-columns: 1fr; }
  .preview-card { flex-direction: column; align-items: flex-start; }
  .header-inner { padding: 0 var(--space-4); gap: var(--space-2); }
  .header-nav { margin-left: 0; }
  .nav-link.pricing { display: none; }
  .header-panel {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    min-width: 0;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
  .tool-panel { grid-template-columns: 1fr; }
  .user-name { display: none; }
  .header-logo-text { font-size: var(--text-base); }
}

/* ==================== 以下是本次新增/微调（不会覆盖上面的任何样式） ==================== */

/* 付费弹窗顶部提示条 */
.pay-alert {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 1.5;
}
.pay-alert .alert-icon { font-size: 18px; }
#pay-alert-member {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #4ade80;
}
#pay-alert-guest {
  background: rgba(251, 191, 36, 0.15);
  border: 1px solid rgba(251, 191, 36, 0.4);
  color: #fbbf24;
}
#pay-alert-guest a {
  color: #fbbf24;
  text-decoration: underline;
  font-weight: 600;
}

/* 月度会员卡片放大 + 价格大字（在原有基础上叠加，不重写） */
.plan-card.featured {
  transform: scale(1.03);
}
.plan-card.featured:hover {
  transform: scale(1.03) translateY(-2px);
}
.plan-price strong {
  font-size: 36px;
}