/* ========== Reset & Variables ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #6C63FF;
  --primary-dark: #5A52D5;
  --primary-light: #EEF0FF;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --info: #3B82F6;
  --bg: #0F0F1A;
  --bg-card: #1A1A2E;
  --bg-card2: #16213E;
  --border: rgba(255,255,255,0.08);
  --text: #F0F0F5;
  --text-muted: #8888AA;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ========== Layout ========== */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 16px;
  width: 100%;
}

/* ========== Navbar ========== */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 64px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-icon { font-size: 1.5rem; }
.brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  background: linear-gradient(135deg, #6C63FF, #48CAE4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links { display: flex; gap: 8px; }
.nav-link {
  padding: 8px 18px;
  border-radius: 20px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}
.nav-link:hover { color: var(--text); background: var(--border); }
.nav-link.active {
  color: #fff;
  background: var(--primary);
}
.nav-link.disabled {
  color: var(--text-muted);
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  text-decoration: line-through;
}
.nav-link.disabled:hover {
  color: var(--text-muted);
  background: transparent;
}

/* ========== Hero ========== */
.hero {
  text-align: center;
  margin-bottom: 32px;
}
.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #6C63FF 0%, #48CAE4 50%, #A8EDEA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}
.hero-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ========== Form Card ========== */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 22px;
}
.form-group.flex-1 { flex: 1; min-width: 0; }

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.label-icon { margin-right: 4px; }
.required { color: var(--danger); }

.form-textarea,
.form-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  padding: 12px 14px;
  transition: var(--transition);
  outline: none;
  font-family: inherit;
  resize: vertical;
}
.form-textarea:focus,
.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.2);
}
.form-textarea::placeholder,
.form-input::placeholder { color: var(--text-muted); }

.form-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.4;
}

/* ========== Model Selection (index) ========== */
.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 8px;
}
.model-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: var(--transition);
  overflow: hidden;
}
.model-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(108,99,255,0.2);
}
.model-card.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  position: relative;
}
.model-card.disabled::after {
  content: '暂不可用';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 10;
  white-space: nowrap;
}
.model-card.disabled:hover {
  transform: none;
  border-color: var(--border);
  box-shadow: none;
}
.model-badge {
  position: absolute;
  top: 14px; right: 14px;
  background: linear-gradient(135deg, var(--primary), #48CAE4);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
  letter-spacing: 0.05em;
}
.model-icon { font-size: 2.4rem; }
.model-name {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0;
}
.model-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}
.model-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.model-features li { font-size: 0.85rem; color: var(--text-muted); }
.model-btn {
  margin-top: auto;
  display: inline-block;
  padding: 10px 20px;
  background: rgba(108,99,255,0.15);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: 20px;
  color: var(--primary);
  font-size: 0.88rem;
  font-weight: 700;
  text-align: center;
  transition: var(--transition);
}
.model-card:hover .model-btn {
  background: var(--primary);
  color: #fff;
}

/* Model Tag (in form pages) */
.model-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 14px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.model-tag-veo  { background: rgba(108,99,255,0.15); color: var(--primary); }
.model-tag-sora { background: rgba(72,202,228,0.15); color: #48CAE4; }

/* Nav brand link */
.nav-brand-link { text-decoration: none; display: flex; align-items: center; gap: 10px; }

/* Sora submit btn tint */
.submit-btn-sora { background: linear-gradient(135deg, #48CAE4, #0096C7); }
.submit-btn-sora:hover { box-shadow: 0 6px 24px rgba(72,202,228,0.4); }

/* Grok */
.model-tag-grok { background: rgba(250,204,21,0.15); color: #FACC15; }
.model-card-grok:hover { border-color: #FACC15; box-shadow: 0 8px 32px rgba(250,204,21,0.18); }
.model-badge-grok { background: linear-gradient(135deg, #FACC15, #F97316); }
.model-btn-grok { background: rgba(250,204,21,0.12); border-color: rgba(250,204,21,0.35); color: #FACC15; }
.model-card-grok:hover .model-btn-grok { background: #FACC15; color: #0F0F1A; }
.submit-btn-grok { background: linear-gradient(135deg, #FACC15, #F97316); color: #0F0F1A; }
.submit-btn-grok:hover { box-shadow: 0 6px 24px rgba(250,204,21,0.4); }

/* Task model badge */
.task-model {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: rgba(108,99,255,0.12);
  border-radius: 8px;
  color: var(--primary);
}

/* ========== Image Mode Tabs ========== */
.img-mode-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.img-mode-tab {
  padding: 7px 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}
.img-mode-tab:hover { border-color: rgba(108,99,255,0.5); color: var(--text); }
.img-mode-tab.active {
  border-color: var(--primary);
  background: rgba(108,99,255,0.15);
  color: #fff;
}
.img-mode-panel { display: flex; flex-direction: column; gap: 8px; }
.img-mode-panel.hidden { display: none; }
.url-list { display: flex; flex-direction: column; gap: 8px; }
.field-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ========== Task Refs ========== */
.task-refs { display: flex; gap: 6px; flex-wrap: wrap; }

/* ========== Options Row ========== */
.options-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

/* ========== Radio Cards ========== */
.radio-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.radio-card {
  cursor: pointer;
  position: relative;
}
.radio-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: var(--transition);
  white-space: nowrap;
}
.radio-card input:checked + .radio-label {
  border-color: var(--primary);
  background: rgba(108,99,255,0.15);
  color: #fff;
}
.radio-label:hover {
  border-color: rgba(108,99,255,0.5);
  color: var(--text);
}

.ratio-icon {
  font-size: 0.75rem;
  display: inline-block;
}
.ratio-portrait { transform: scale(0.7, 1.2); }
.ratio-landscape { transform: scale(1.2, 0.7); }

/* ========== Submit Button ========== */
.submit-btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), #48CAE4);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  margin-top: 8px;
  letter-spacing: 0.02em;
}
.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(108,99,255,0.4);
}
.submit-btn:active { transform: translateY(0); }
.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}
.btn-icon { font-size: 1.1rem; }
.btn-loading .btn-icon { animation: spin 1s linear infinite; }

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

/* ========== Toast ========== */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 24px;
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 999;
  max-width: 420px;
  text-align: center;
  animation: fadeInDown 0.3s ease;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.toast.hidden { display: none; }
.toast.success { background: var(--success); color: #fff; }
.toast.error { background: var(--danger); color: #fff; }
.toast.info { background: var(--info); color: #fff; }

@keyframes fadeInDown {
  from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ========== Tasks Page ========== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.page-title {
  font-size: 1.6rem;
  font-weight: 700;
}
.refresh-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text);
  cursor: pointer;
  font-size: 0.875rem;
  transition: var(--transition);
}
.refresh-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ========== Task Grid ========== */
.task-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: var(--transition);
}
.task-card:hover {
  border-color: rgba(108,99,255,0.3);
  box-shadow: 0 4px 20px rgba(108,99,255,0.1);
}

.task-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.task-status {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 12px;
}
.status-pending  { background: rgba(245,158,11,0.15); color: var(--warning); }
.status-processing { background: rgba(59,130,246,0.15); color: var(--info); animation: pulse 2s infinite; }
.status-completed { background: rgba(16,185,129,0.15); color: var(--success); }
.status-failed   { background: rgba(239,68,68,0.15); color: var(--danger); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.task-meta {
  display: flex;
  gap: 6px;
}
.task-meta span {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: var(--bg);
  border-radius: 8px;
  color: var(--text-muted);
}

.task-prompt {
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.5;
  max-height: 3.6em;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

/* ========== Video Player ========== */
.task-video {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.video-player {
  width: 100%;
  border-radius: var(--radius-sm);
  background: #000;
  max-height: 300px;
}
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  background: rgba(16,185,129,0.15);
  color: var(--success);
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  align-self: flex-start;
  transition: var(--transition);
}
.download-btn:hover { background: rgba(16,185,129,0.25); }

.no-video {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-style: italic;
}

.task-error {
  font-size: 0.85rem;
  color: var(--danger);
  background: rgba(239,68,68,0.08);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

.task-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.task-time {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.ref-link {
  font-size: 0.78rem;
  color: var(--primary);
  text-decoration: none;
}
.ref-link:hover { text-decoration: underline; }

/* ========== Empty State ========== */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
}
.empty-icon { font-size: 4rem; margin-bottom: 16px; }
.empty-text {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 24px;
}
.empty-action-btn {
  display: inline-block;
  padding: 11px 28px;
  background: linear-gradient(135deg, var(--primary), #48CAE4);
  color: #fff;
  border-radius: 24px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition);
}
.empty-action-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(108,99,255,0.4);
}

/* ========== Modal ========== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal.hidden { display: none; }
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.75);
}
.modal-content {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  max-width: 90vw;
  width: 700px;
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
}
.modal-video { width: 100%; border-radius: var(--radius-sm); }

/* ========== Loading State ========== */
.loading-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 80px 20px;
  color: var(--text-muted);
}
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ========== Veo3.1 Pro Model Styles ========== */
.model-tag-veopro { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.model-card-veopro { border-top: 4px solid #f59e0b; }
.model-card-veopro:hover { transform: translateY(-6px); box-shadow: 0 12px 32px rgba(245,158,11,0.25); }
.model-badge-veopro { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.model-btn-veopro { background: linear-gradient(135deg, #f59e0b, #ef4444); color: #fff; }
.submit-btn-veopro { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.submit-btn-veopro:hover:not(:disabled) { background: linear-gradient(135deg, #d97706, #dc2626); }

/* ========== Wan2.6 Model Styles ========== */
.model-tag-wan { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.model-card-wan { border-top: 4px solid #0ea5e9; }
.model-card-wan:hover { transform: translateY(-6px); box-shadow: 0 12px 32px rgba(14,165,233,0.25); }
.model-badge-wan { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.model-btn-wan { background: linear-gradient(135deg, #0ea5e9, #6366f1); color: #fff; }
.submit-btn-wan { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.submit-btn-wan:hover:not(:disabled) { background: linear-gradient(135deg, #0284c7, #4f46e5); }

/* 高级选项折叠 */
.advanced-section { margin: 16px 0; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.advanced-toggle {
  padding: 12px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.advanced-toggle::-webkit-details-marker { display: none; }
.advanced-toggle::before { content: '▶ '; font-size: 0.7rem; }
details[open] .advanced-toggle::before { content: '▼ '; }
.advanced-body { padding: 12px 16px 16px; border-top: 1px solid var(--border); }

/* URL 列表输入行间距 */
.url-list { display: flex; flex-direction: column; gap: 8px; }
.field-hint { font-size: 0.78rem; color: var(--text-muted); margin-top: 4px; }
.field-limit { font-size: 0.78rem; color: var(--text-muted); font-weight: normal; }

/* 图片上传组件 */
.image-input-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.image-input-wrapper .form-input {
  width: 100%;
}


.file-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}

.file-upload-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card2);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  font-family: inherit;
  white-space: nowrap;
  position: relative;
  user-select: none;
}

.file-upload-btn::before {
  content: '📎';
  margin-right: 6px;
  font-size: 1rem;
}

.file-upload-btn:hover {
  border-color: var(--primary);
  background: rgba(108, 99, 255, 0.1);
  color: var(--primary);
}

.file-upload-btn:active {
  transform: scale(0.98);
}

.file-upload-btn.uploading {
  opacity: 0.6;
  cursor: not-allowed;
}

.file-upload-btn.uploading::before {
  content: '⏳';
}

.image-preview {
  max-width: 100px;
  max-height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--border);
  cursor: pointer;
  margin-top: 4px;
}

.image-preview.hidden {
  display: none;
}

.image-preview:not(.hidden) {
  display: block;
}

/* ========== Footer ========== */
.footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}

/* ========== Responsive ========== */
/* ========== 移动端响应式设计 ========== */
/* 触摸友好的最小点击区域 */
@media (max-width: 768px) {
  /* 确保所有可点击元素至少有44x44px的点击区域 */
  .nav-link,
  .model-card,
  .submit-btn,
  .radio-card,
  .file-upload-btn {
    min-height: 44px;
    min-width: 44px;
  }
  
  /* 触摸滚动优化 */
  * {
    -webkit-tap-highlight-color: rgba(108, 99, 255, 0.2);
  }
  /* 导航栏优化 */
  .navbar {
    padding: 0 10px;
    height: auto;
    min-height: 56px;
    flex-wrap: wrap;
    align-items: flex-start;
    padding-top: 8px;
    padding-bottom: 8px;
  }
  
  .nav-brand {
    flex: 0 0 auto;
    width: 100%;
    margin-bottom: 8px;
  }
  
  .brand-name {
    font-size: 0.9rem;
  }
  
  .brand-icon {
    font-size: 1.2rem;
  }
  
  .nav-links {
    flex-wrap: wrap;
    gap: 4px;
    font-size: 0.75rem;
    width: 100%;
    justify-content: flex-start;
    overflow-x: visible;
  }
  
  .nav-link {
    padding: 5px 10px;
    font-size: 0.75rem;
    white-space: nowrap;
    flex-shrink: 0;
    border-radius: 16px;
  }
  
  /* 主内容区域 */
  .main-content {
    padding: 20px 12px;
  }
  
  /* Hero区域 */
  .hero {
    margin-bottom: 24px;
  }
  
  .hero-title {
    font-size: 1.6rem;
    line-height: 1.3;
  }
  
  .hero-subtitle {
    font-size: 0.9rem;
  }
  
  /* 模型网格 - 手机单列显示 */
  .model-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .model-card {
    padding: 20px;
  }
  
  .model-icon {
    font-size: 2rem;
  }
  
  .model-name {
    font-size: 1.15rem;
  }
  
  .model-desc {
    font-size: 0.85rem;
  }
  
  .model-features {
    gap: 5px;
  }
  
  .model-features li {
    font-size: 0.8rem;
  }
  
  .model-btn {
    padding: 8px 16px;
    font-size: 0.85rem;
  }
  
  /* 表单卡片 */
  .form-card {
    padding: 18px;
  }
  
  .form-group {
    margin-bottom: 18px;
  }
  
  .form-label {
    font-size: 0.8rem;
    margin-bottom: 8px;
  }
  
  .form-textarea,
  .form-input {
    font-size: 0.9rem;
    padding: 10px 12px;
  }
  
  /* 选项行 */
  .options-row {
    flex-direction: column;
    gap: 16px;
  }
  
  /* 单选按钮组 */
  .radio-group {
    flex-direction: column;
    gap: 8px;
  }
  
  .radio-label {
    padding: 8px 14px;
    font-size: 0.85rem;
  }
  
  /* 提交按钮 */
  .submit-btn {
    padding: 12px;
    font-size: 0.95rem;
  }
  
  /* Footer */
  .footer {
    padding: 16px 12px;
    font-size: 0.75rem;
  }
}

@media (max-width: 640px) {
  .options-row { flex-direction: column; }
  .task-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 1.5rem; }
  .navbar { 
    padding: 0 8px;
    padding-top: 6px;
    padding-bottom: 6px;
  }
  
  .form-card { padding: 16px; }
  
  .nav-brand {
    margin-bottom: 6px;
  }
  
  .nav-links {
    gap: 3px;
    font-size: 0.7rem;
  }
  
  .nav-link {
    padding: 4px 8px;
    font-size: 0.7rem;
    border-radius: 14px;
  }
  
  .brand-name {
    font-size: 0.85rem;
  }
  
  .brand-icon {
    font-size: 1.1rem;
  }
  
  .main-content {
    padding: 16px 10px;
  }
  
  .model-card {
    padding: 16px;
  }
  
  .hero-title {
    font-size: 1.4rem;
  }
}

/* 超小屏幕（小于480px） */
@media (max-width: 480px) {
  .navbar {
    height: auto;
    min-height: 50px;
    padding: 0 6px;
    padding-top: 6px;
    padding-bottom: 6px;
  }
  
  .nav-brand {
    margin-bottom: 5px;
  }
  
  .brand-icon {
    font-size: 1rem;
  }
  
  .brand-name {
    font-size: 0.8rem;
  }
  
  .nav-links {
    gap: 3px;
    font-size: 0.68rem;
  }
  
  .nav-link {
    padding: 4px 7px;
    font-size: 0.68rem;
    border-radius: 12px;
  }
  
  .main-content {
    padding: 12px 8px;
  }
  
  .hero-title {
    font-size: 1.3rem;
    margin-bottom: 8px;
  }
  
  .hero-subtitle {
    font-size: 0.85rem;
  }
  
  .model-grid {
    gap: 12px;
  }
  
  .model-card {
    padding: 14px;
  }
  
  .model-icon {
    font-size: 1.8rem;
  }
  
  .model-name {
    font-size: 1.05rem;
  }
  
  .model-desc {
    font-size: 0.8rem;
  }
  
  .form-card {
    padding: 14px;
  }
  
  .footer {
    padding: 12px 8px;
    font-size: 0.7rem;
    line-height: 1.5;
  }
  
  /* 确保卡片在小屏幕上不会溢出 */
  .model-card,
  .form-card {
    max-width: 100%;
    box-sizing: border-box;
  }
  
  /* 优化图片上传按钮在手机上的显示 */
  .file-upload-btn {
    padding: 12px 16px;
    font-size: 0.85rem;
  }
  
  /* 优化图片输入包装器 */
  .image-input-wrapper {
    flex-direction: column;
    gap: 8px;
  }
  
  .file-upload-btn {
    width: 100%;
    justify-content: center;
  }
}