/* ==========================================================================
   Activate Page Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   Page Layout
   -------------------------------------------------------------------------- */
.activate-page {
  min-height: 100vh;
  padding-top: var(--nav-height);
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-background) 50%);
}

/* Breadcrumb */
.breadcrumb-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  margin-top: 36px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--color-text);
}

.breadcrumb-separator {
  width: 14px;
  height: 14px;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Form Section
   -------------------------------------------------------------------------- */
.form-section {
  padding: var(--space-8) var(--space-6) var(--space-16);
}

.form-container {
  max-width: 680px;
  margin: 0 auto;
}

/* Form Header */
.form-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.form-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-6);
  animation: bounceIn 0.6s ease-out;
}

.form-icon svg {
  width: 100%;
  height: 100%;
  color: var(--color-text);
}

.form-title {
  font-size: var(--font-size-h1);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  margin-bottom: var(--space-4);
  animation: fadeInUp 0.5s ease-out;
}

.form-subtitle {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: 1.7;
  animation: fadeInUp 0.5s ease-out 0.1s backwards;
}

/* --------------------------------------------------------------------------
   Progress Steps
   -------------------------------------------------------------------------- */
.progress-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
  animation: fadeInUp 0.5s ease-out 0.2s backwards;
}

.step {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.step-number {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--color-text-muted);
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  transition: all var(--transition-normal);
}

.step-label {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  transition: color var(--transition-normal);
}

.step.active .step-number {
  color: var(--color-background);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.step.active .step-label {
  color: var(--color-text);
  font-weight: 500;
}

.step.completed .step-number {
  color: var(--color-background);
  background-color: var(--color-success);
  /* 色盲友好：已改为蓝色 */
  border-color: var(--color-success);
}

/* 完成状态添加勾选图标 */
.step.completed .step-number::after {
  content: '✓';
  font-size: 0.875rem;
  font-weight: bold;
}

.step.completed .step-number {
  font-size: 0;
  /* 隐藏数字，显示勾选 */
}

.step.completed .step-label {
  color: var(--color-success);
  /* 色盲友好：已改为蓝色 */
  font-weight: 600;
}

.step-line {
  width: 40px;
  height: 2px;
  background-color: var(--color-border);
  transition: background-color var(--transition-normal);
}

.step-line.completed {
  background-color: var(--color-success);
}

@media (max-width: 640px) {
  .step-label {
    display: none;
  }

  .step-line {
    width: 24px;
  }
}

/* --------------------------------------------------------------------------
   Form Styles
   -------------------------------------------------------------------------- */
.activation-form {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  animation: fadeInUp 0.5s ease-out 0.3s backwards;
}

.form-step {
  display: none;
}

.form-step.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

/* Form Groups */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-body);
  /* 增大标签字体 */
  font-weight: 600;
  /* 加粗 */
  color: var(--color-text);
}

.required {
  color: #EF4444;
}

/* Input Wrapper */
.input-wrapper {
  position: relative;
}

.input-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  pointer-events: none;
  transition: color var(--transition-fast);
}

.form-input,
.form-select {
  width: 100%;
  min-height: 56px;
  /* 增大触控区域 */
  padding: var(--space-4) var(--space-4) var(--space-4) calc(var(--space-4) + 36px);
  font-size: var(--font-size-body);
  color: var(--color-text);
  background-color: var(--color-background);
  border: 2px solid var(--color-border);
  /* 增加边框可见性 */
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:hover,
.form-select:hover {
  border-color: var(--color-border-hover);
}

.form-input:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

.form-input:focus+.input-icon,
.form-select:focus~.input-icon {
  color: var(--color-primary);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-input:disabled {
  background-color: var(--color-surface);
  cursor: not-allowed;
  opacity: 0.7;
}

/* Select Wrapper */
.select-wrapper {
  position: relative;
}

.form-select {
  appearance: none;
  cursor: pointer;
  padding-right: calc(var(--space-4) + 24px);
}

.select-arrow {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  pointer-events: none;
  transition: transform var(--transition-fast);
}

.form-select:focus~.select-arrow {
  transform: translateY(-50%) rotate(180deg);
}

/* Form Hints & Errors */
.form-hint,
.form-error {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
  font-size: var(--font-size-caption);
}

.form-hint {
  color: var(--color-text-muted);
}

.form-hint-link {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  background-color: var(--color-surface);
  font-size: 0.75rem;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.form-hint-link:hover {
  color: var(--color-text);
  border-color: var(--color-primary);
  background-color: color-mix(in srgb, var(--color-primary) 8%, transparent);
}

.hint-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.form-error {
  color: #DC2626;
  display: none;
  font-weight: 500;
}

/* 错误提示添加图标（不仅依赖颜色） */
.form-error::before {
  content: '⚠ ';
  font-size: 1em;
}

.form-group.error .form-input,
.form-group.error .form-select {
  border-color: #EF4444;
}

.form-group.error .form-error {
  display: flex;
}

.form-group.error .form-hint {
  display: none;
}

.form-group.success .form-input,
.form-group.success .form-select {
  border-color: var(--color-success);
}

/* --------------------------------------------------------------------------
   Platform Options
   -------------------------------------------------------------------------- */
.platform-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  max-height: 400px;
  overflow-y: auto;
  padding-right: var(--space-2);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.platform-options::-webkit-scrollbar {
  width: 6px;
}

.platform-options::-webkit-scrollbar-track {
  background: transparent;
}

.platform-options::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 3px;
}

.platform-options::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-border-hover);
}

@media (max-width: 640px) {
  .platform-options {
    grid-template-columns: repeat(2, 1fr);
    max-height: 320px;
  }
}

@media (max-width: 400px) {
  .platform-options {
    grid-template-columns: 1fr;
    max-height: 280px;
  }
}

.platform-option {
  cursor: pointer;
}

.platform-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.platform-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background-color: var(--color-surface);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-height: 120px;
  justify-content: center;
}

.platform-card:hover {
  background-color: var(--color-background);
  border-color: var(--color-border);
}

.platform-option input:checked+.platform-card {
  background-color: var(--color-background);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.platform-option input:focus-visible+.platform-card {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Platform Icon Wrapper with brand background */
.platform-icon-wrapper {
  width: 92px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background-color: var(--color-background);
  transition: transform var(--transition-fast);
}

.platform-card:hover .platform-icon-wrapper {
  transform: scale(1.05);
}

.platform-icon {
  width: 84px;
  height: 28px;
}

.platform-logo {
  object-fit: contain;
}

.platform-name {
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
  line-height: 1.2;
}

.platform-format {
  font-size: 10px;
  color: var(--color-text-muted);
  font-family: monospace;
  text-align: center;
  word-break: break-all;
}

/* Platform Brand Colors - Hover/Selected States */
.platform-option[data-brand="amazon"] input:checked+.platform-card {
  border-color: #FF9900;
}

.platform-option[data-brand="amazon"] .platform-card:hover {
  border-color: rgba(255, 153, 0, 0.5);
}

.platform-option[data-brand="rakuten"] input:checked+.platform-card {
  border-color: #BF0000;
}

.platform-option[data-brand="rakuten"] .platform-card:hover {
  border-color: rgba(191, 0, 0, 0.5);
}

.platform-option[data-brand="yahoo"] input:checked+.platform-card {
  border-color: #6001D2;
}

.platform-option[data-brand="yahoo"] .platform-card:hover {
  border-color: rgba(96, 1, 210, 0.5);
}

.platform-option[data-brand="tiktok"] input:checked+.platform-card {
  border-color: #111827;
}

.platform-option[data-brand="tiktok"] .platform-card:hover {
  border-color: rgba(17, 24, 39, 0.5);
}

.platform-option[data-brand="walmart"] input:checked+.platform-card {
  border-color: #0071CE;
}

.platform-option[data-brand="walmart"] .platform-card:hover {
  border-color: rgba(0, 113, 206, 0.5);
}

.platform-option[data-brand="ebay"] input:checked+.platform-card {
  border-color: #0064D2;
}

.platform-option[data-brand="ebay"] .platform-card:hover {
  border-color: rgba(0, 100, 210, 0.5);
}

.platform-option[data-brand="aliexpress"] input:checked+.platform-card {
  border-color: #FF4747;
}

.platform-option[data-brand="aliexpress"] .platform-card:hover {
  border-color: rgba(255, 71, 71, 0.5);
}

.platform-option[data-brand="shopee"] input:checked+.platform-card {
  border-color: #EE4D2D;
}

.platform-option[data-brand="shopee"] .platform-card:hover {
  border-color: rgba(238, 77, 45, 0.5);
}

.platform-option[data-brand="lazada"] input:checked+.platform-card {
  border-color: #0F146D;
}

.platform-option[data-brand="lazada"] .platform-card:hover {
  border-color: rgba(15, 20, 109, 0.5);
}

.platform-option[data-brand="mercari"] input:checked+.platform-card {
  border-color: #FF0211;
}

.platform-option[data-brand="mercari"] .platform-card:hover {
  border-color: rgba(255, 2, 17, 0.5);
}

.platform-option[data-brand="qoo10"] input:checked+.platform-card {
  border-color: #E5135A;
}

.platform-option[data-brand="qoo10"] .platform-card:hover {
  border-color: rgba(229, 19, 90, 0.5);
}

.platform-option[data-brand="coupang"] input:checked+.platform-card {
  border-color: #C73C3C;
}

.platform-option[data-brand="coupang"] .platform-card:hover {
  border-color: rgba(199, 60, 60, 0.5);
}

.platform-option[data-brand="jd"] input:checked+.platform-card {
  border-color: #E2231A;
}

.platform-option[data-brand="jd"] .platform-card:hover {
  border-color: rgba(226, 35, 26, 0.5);
}

.platform-option[data-brand="taobao"] input:checked+.platform-card {
  border-color: #FF5000;
}

.platform-option[data-brand="taobao"] .platform-card:hover {
  border-color: rgba(255, 80, 0, 0.5);
}

.platform-option[data-brand="tmall"] input:checked+.platform-card {
  border-color: #FF0036;
}

.platform-option[data-brand="tmall"] .platform-card:hover {
  border-color: rgba(255, 0, 54, 0.5);
}

.platform-option[data-brand="other"] input:checked+.platform-card {
  border-color: #64748B;
}

.platform-option[data-brand="other"] .platform-card:hover {
  border-color: rgba(100, 116, 139, 0.5);
}

/* --------------------------------------------------------------------------
   Form Actions
   -------------------------------------------------------------------------- */
.form-actions {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-body);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-icon {
  width: 18px;
  height: 18px;
}

.btn-primary {
  flex: 1;
  color: var(--color-background);
  background-color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  color: var(--color-text);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface);
  border-color: var(--color-border-hover);
}

/* --------------------------------------------------------------------------
   Confirmation Section (Step 2)
   -------------------------------------------------------------------------- */
.confirmation-section {
  padding: var(--space-6) 0;
}

.confirmation-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.confirmation-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
}

.confirmation-label {
  font-size: var(--font-size-h3);
  font-weight: 600;
  color: var(--color-text);
}

.confirmation-details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.confirm-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.confirm-item:last-child {
  border-bottom: none;
}

.confirm-label {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  font-weight: 500;
}

.confirm-value {
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-text);
  text-align: right;
  word-break: break-all;
  max-width: 60%;
}

.confirmation-note {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Success Section
   -------------------------------------------------------------------------- */
.success-section {
  text-align: center;
  padding: var(--space-8) 0;
}

.success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  animation: successPop 0.5s ease-out;
}

.success-icon svg {
  width: 100%;
  height: 100%;
}

.success-icon circle {
  stroke-dasharray: 188;
  stroke-dashoffset: 188;
  animation: circleIn 0.6s ease-out forwards;
}

.success-icon path {
  stroke-dasharray: 50;
  stroke-dashoffset: 50;
  animation: checkIn 0.4s ease-out 0.4s forwards;
}

@keyframes circleIn {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes checkIn {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes successPop {
  0% {
    transform: scale(0.8);
    opacity: 0;
  }

  50% {
    transform: scale(1.1);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.success-title {
  font-size: var(--font-size-h1);
  font-weight: 700;
  color: var(--color-success);
  /* 色盲友好：已改为蓝色 */
  margin-bottom: var(--space-4);
}

.success-message {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.success-details {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: left;
  margin-bottom: var(--space-8);
}

.detail-item {
  display: flex;
  justify-content: space-between;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.detail-item:last-child {
  border-bottom: none;
}

.detail-label {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.detail-value {
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Form Help
   -------------------------------------------------------------------------- */
.form-help {
  text-align: center;
  margin-top: var(--space-6);
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.help-link {
  color: var(--color-text);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

.help-link:hover {
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   Footer Simple
   -------------------------------------------------------------------------- */
.footer-simple {
  background-color: var(--color-background);
  padding: var(--space-8) 0;
}

.footer-simple .footer-bottom {
  flex-direction: row;
  justify-content: space-between;
}

.footer-links-inline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-small);
}

.footer-links-inline a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-links-inline a:hover {
  color: var(--color-text);
}

.footer-links-inline .divider {
  color: var(--color-border);
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }

  50% {
    transform: scale(1.05);
  }

  70% {
    transform: scale(0.9);
  }

  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes shake {

  0%,
  100% {
    transform: translateX(0);
  }

  10%,
  30%,
  50%,
  70%,
  90% {
    transform: translateX(-4px);
  }

  20%,
  40%,
  60%,
  80% {
    transform: translateX(4px);
  }
}

.shake {
  animation: shake 0.5s ease-in-out;
}

/* --------------------------------------------------------------------------
   Loading State
   -------------------------------------------------------------------------- */
.btn.loading {
  pointer-events: none;
  position: relative;
}

.btn.loading span {
  opacity: 0;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

/* Tablet: < 768px */
@media (max-width: 768px) {
  .breadcrumb-container {
    padding: var(--space-3) var(--space-4);
  }

  .form-section {
    padding: var(--space-6) var(--space-4) var(--space-10);
  }

  .form-header {
    margin-bottom: var(--space-8);
  }

  .form-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--space-4);
  }

  .form-title {
    font-size: var(--font-size-h2);
  }

  .form-subtitle {
    font-size: var(--font-size-small);
  }

  .form-subtitle br {
    display: none;
  }

  .progress-steps {
    margin-bottom: var(--space-8);
  }

  .activation-form {
    padding: var(--space-5);
  }

  .platform-options {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
    max-height: 350px;
  }

  .platform-card {
    padding: var(--space-2);
    min-height: 108px;
  }

  .platform-icon-wrapper {
    width: 84px;
    height: 34px;
  }

  .platform-icon {
    width: 76px;
    height: 26px;
  }

  .platform-name {
    font-size: 0.8125rem;
  }

  .platform-format {
    font-size: 9px;
  }
}

/* Mobile: < 640px */
@media (max-width: 640px) {
  .form-section {
    padding: var(--space-4) var(--space-3) var(--space-8);
  }

  .activation-form {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }

  .form-group {
    margin-bottom: var(--space-5);
  }

  .form-label {
    font-size: var(--font-size-small);
    margin-bottom: var(--space-2);
  }

  .form-input,
  .form-select {
    min-height: 48px;
    padding: var(--space-3) var(--space-3) var(--space-3) calc(var(--space-3) + 32px);
    font-size: 16px;
    /* 防止 iOS 缩放 */
  }

  .input-icon {
    left: var(--space-3);
    width: 18px;
    height: 18px;
  }

  .form-actions {
    flex-direction: column;
    gap: var(--space-3);
    margin-top: var(--space-6);
  }

  .btn {
    padding: var(--space-4) var(--space-5);
    font-size: var(--font-size-small);
  }

  .btn-secondary {
    order: 1;
  }

  /* 验证部分 */
  .verification-section {
    padding: var(--space-6) 0;
  }

  .captcha-box {
    padding: var(--space-3) var(--space-4);
  }

  /* 成功部分 */
  .success-section {
    padding: var(--space-6) 0;
  }

  .success-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-4);
  }

  .success-title {
    font-size: var(--font-size-h2);
  }

  .success-details {
    padding: var(--space-4);
  }

  .detail-item {
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-3) 0;
  }

  /* Footer */
  .footer-simple .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }

  .footer-links-inline {
    justify-content: center;
  }
}

/* Small Mobile: < 480px */
@media (max-width: 480px) {
  .breadcrumb {
    font-size: 0.8125rem;
  }

  .form-icon {
    width: 48px;
    height: 48px;
  }

  .progress-steps {
    gap: var(--space-1);
  }

  .step-number {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
  }

  .step-line {
    width: 20px;
  }

  .platform-options {
    grid-template-columns: repeat(2, 1fr);
    max-height: 300px;
  }

  .platform-card {
    min-height: 96px;
    gap: var(--space-1);
  }

  .platform-icon-wrapper {
    width: 72px;
    height: 30px;
  }

  .platform-icon {
    width: 66px;
    height: 24px;
  }

  .platform-name {
    font-size: 0.75rem;
    line-height: 1.1;
  }

  .platform-format {
    display: none;
  }
}

/* 超小屏幕: < 360px */
@media (max-width: 360px) {
  .platform-options {
    grid-template-columns: 1fr;
  }

  .platform-card {
    flex-direction: row;
    min-height: auto;
    padding: var(--space-3);
    gap: var(--space-3);
  }

  .platform-name {
    font-size: var(--font-size-small);
  }

  .platform-format {
    display: block;
    font-size: 0.6875rem;
  }
}

/* --------------------------------------------------------------------------
   Accessibility Enhancements for Form
   -------------------------------------------------------------------------- */

/* 高对比度模式表单样式 */
.high-contrast .form-input,
.high-contrast .form-select {
  border-width: 2px;
  border-color: #000000;
}

.high-contrast .form-input:focus,
.high-contrast .form-select:focus {
  border-color: #000000;
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.3);
}

.high-contrast .platform-card {
  border-width: 2px;
}

.high-contrast .platform-option input:checked+.platform-card {
  border-width: 3px;
  border-color: #000000;
}

/* 大字体模式按钮样式 */
.large-text .btn {
  padding: var(--space-5) var(--space-8);
  font-size: 1.25rem;
}

.large-text .platform-name {
  font-size: var(--font-size-body);
}

/* 必填标记增强可见性 */
.required {
  color: #DC2626;
  font-weight: bold;
  font-size: 1.2em;
}

/* 表单组成功状态（色盲友好） */
.form-group.success .form-input,
.form-group.success .form-select {
  border-color: var(--color-success);
  /* 蓝色 */
}

.form-group.success .form-input::after {
  content: '✓';
  color: var(--color-success);
}