/* ============================================
   商联云平台 - 共享设计系统
   ============================================ */

:root {
  /* 主色调 */
  --primary: #4F46E5;
  --primary-light: #6366F1;
  --primary-lighter: #818CF8;
  --primary-dark: #4338CA;
  --primary-bg: #EEF2FF;
  
  /* 辅助色 */
  --success: #10B981;
  --success-bg: #ECFDF5;
  --warning: #F59E0B;
  --warning-bg: #FFFBEB;
  --danger: #EF4444;
  --danger-bg: #FEF2F2;
  --info: #3B82F6;
  --info-bg: #EFF6FF;
  
  /* 中性色 */
  --text-primary: #111827;
  --text-secondary: #4B5563;
  --text-tertiary: #9CA3AF;
  --text-white: #FFFFFF;
  --bg-page: #F9FAFB;
  --bg-card: #FFFFFF;
  --bg-hover: #F3F4F6;
  --border: #E5E7EB;
  --border-dark: #D1D5DB;
  
  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
  
  /* 过渡 */
  --transition: all 0.2s ease;
  
  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ============================================
   基础重置
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg-page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

/* ============================================
   布局容器
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-sm {
  max-width: 768px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-sm {
  padding: 48px 0;
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.navbar-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-lighter) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar-menu a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

.navbar-menu a:hover,
.navbar-menu a.active {
  color: var(--primary);
}

.navbar-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: inherit;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 16px;
}

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--primary);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

.btn-sm {
  padding: 6px 16px;
  font-size: 14px;
}

.btn-block {
  width: 100%;
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover {
  background: #059669;
  color: white;
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  background: #DC2626;
  color: white;
}

/* ============================================
   卡片
   ============================================ */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}

.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-body {
  padding: 28px;
}

.card-body-sm {
  padding: 20px;
}

/* ============================================
   表单
   ============================================ */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-label .required {
  color: var(--danger);
  margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text-primary);
  background: white;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  outline: none;
}

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

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-tertiary);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%239CA3AF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-hint {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 6px;
}

.form-error {
  font-size: 13px;
  color: var(--danger);
  margin-top: 6px;
  display: none;
}

.form-error.show {
  display: block;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--danger);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* 复选框 */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  margin-top: 2px;
  flex-shrink: 0;
}

.form-check label {
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
}

/* 标签输入 */
.tag-input-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  min-height: 48px;
  transition: var(--transition);
}

.tag-input-container:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
}

.tag-item .tag-remove {
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  opacity: 0.6;
}

.tag-item .tag-remove:hover {
  opacity: 1;
}

.tag-input {
  border: none;
  outline: none;
  flex: 1;
  min-width: 120px;
  font-size: 14px;
  padding: 4px;
  font-family: inherit;
}

/* ============================================
   徽章/标签
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge-primary {
  background: var(--primary-bg);
  color: var(--primary);
}

.badge-success {
  background: var(--success-bg);
  color: var(--success);
}

.badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger);
}

.badge-info {
  background: var(--info-bg);
  color: var(--info);
}

.badge-gray {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

/* ============================================
   页面头部
   ============================================ */
.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  padding: 120px 0 60px;
  text-align: center;
}

.page-header h1 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 17px;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   页脚
   ============================================ */
.footer {
  background: #1F2937;
  color: #9CA3AF;
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  color: white;
  font-size: 20px;
  font-weight: 700;
}

.footer-brand .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-lighter) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-col h4 {
  color: white;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: #9CA3AF;
  font-size: 14px;
}

.footer-col ul li a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
}

/* ============================================
   Toast 通知
   ============================================ */
.toast-container {
  position: fixed;
  top: 84px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border-left: 4px solid var(--success);
  min-width: 280px;
  max-width: 400px;
  animation: toastIn 0.3s ease;
}

.toast.toast-error {
  border-left-color: var(--danger);
}

.toast.toast-warning {
  border-left-color: var(--warning);
}

.toast.toast-info {
  border-left-color: var(--info);
}

.toast-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.toast-message {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

.toast.removing {
  animation: toastOut 0.3s ease forwards;
}

/* ============================================
   步骤指示器
   ============================================ */
.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
}

.step {
  display: flex;
  align-items: center;
  gap: 12px;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  background: var(--bg-hover);
  color: var(--text-tertiary);
  border: 2px solid var(--border);
  transition: var(--transition);
  flex-shrink: 0;
}

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

.step.completed .step-number {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

.step-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-tertiary);
  white-space: nowrap;
}

.step.active .step-label {
  color: var(--primary);
}

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

.step-line {
  width: 60px;
  height: 2px;
  background: var(--border);
  margin: 0 16px;
}

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

/* ============================================
   工具类
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-sm { font-size: 14px; }
.text-xs { font-size: 12px; }
.text-lg { font-size: 18px; }
.text-xl { font-size: 20px; }
.text-2xl { font-size: 24px; }
.text-3xl { font-size: 30px; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); gap: 24px; }
.hidden { display: none; }
.w-full { width: 100%; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 768px) {
  .navbar-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }

  .navbar-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .navbar-toggle {
    display: flex;
  }

  .navbar-actions .btn-ghost {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 48px 0;
  }

  .page-header h1 {
    font-size: 28px;
  }

  .page-header p {
    font-size: 15px;
  }

  .steps {
    flex-direction: column;
    gap: 12px;
  }

  .step-line {
    width: 2px;
    height: 30px;
    margin: 0;
  }
}