/* ===== 全局重置 & 字体 ===== */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
      background: #f5f7fb;
      color: #1e293b;
      line-height: 1.5;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    /* ===== PC 端顶部导航（手机端隐藏） ===== */
    .top-nav {
      display: none;
      width: 100%;
      max-width: 1200px;
      padding: 16px 24px;
      justify-content: space-between;
      align-items: center;
      background: transparent;
      margin-top: 8px;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.6rem;
      font-weight: 700;
      color: #1e3a8a;
      letter-spacing: -0.02em;
    }

    .mini-logo {
      width: 40px;
      height: 40px;
      background: linear-gradient(145deg, #2563eb, #1e40af);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      color: white;
      box-shadow: 0 8px 16px -6px rgba(37, 99, 235, 0.3);
    }

    .nav-links {
      display: flex;
      gap: 32px;
      font-weight: 500;
      color: #334155;
    }

    .nav-links span {
      cursor: default;
      transition: color 0.2s;
    }

    .nav-links span:hover {
      color: #2563eb;
    }

    /* ===== 手机端主容器 ===== */
    .container {
      width: 100%;
      max-width: 480px;
      padding: 24px 20px 8px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    /* 品牌区 */
    .brand-section {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding: 8px 0 4px;
    }

    .logo-icon {
      width: 64px;
      height: 64px;
      background: linear-gradient(145deg, #2563eb, #1e40af);
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 12px 24px -8px rgba(37, 99, 235, 0.4);
      margin-bottom: 12px;
      position: relative;
    }

    .logo-icon::after {
      content: "⚡";
      font-size: 2.2rem;
      color: white;
      line-height: 1;
    }

    .brand-name {
      font-size: 2.2rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: #0f172a;
      line-height: 1.2;
    }

    .brand-slogan {
      font-size: 0.95rem;
      color: #475569;
      margin-top: 6px;
      background: #eef2ff;
      padding: 6px 16px;
      border-radius: 30px;
      display: inline-block;
      font-weight: 500;
    }

    /* 客户主卡片 */
    .primary-card {
      background: white;
      border-radius: 32px;
      padding: 28px 24px 24px;
      box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.12), 0 8px 20px -8px rgba(0, 0, 0, 0.05);
      position: relative;
      border: 1px solid rgba(226, 232, 240, 0.8);
      transition: box-shadow 0.3s;
    }

    .card-badge {
      position: absolute;
      top: -10px;
      right: 24px;
      background: linear-gradient(#fd8324eb, #fff9ee);
      color: #e65100;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 6px 14px;
      border-radius: 40px;
      letter-spacing: 0.5px;
      box-shadow: 0 6px 12px -4px rgba(34, 197, 94, 0.4);
    }

    .primary-icon {
      font-size: 2.8rem;
      display: block;
      margin-bottom: 8px;
      line-height: 1;
    }

    .primary-title {
      font-size: 1.7rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #0f172a;
      margin-bottom: 6px;
    }

    .primary-desc {
      font-size: 0.95rem;
      color: #475569;
      margin-bottom: 24px;
      line-height: 1.6;
    }

    .primary-btn {
      width: 100%;
      background: linear-gradient(145deg, #2563eb, #1e40af);
      border: none;
      color: white;
      font-size: 1.2rem;
      font-weight: 700;
      padding: 18px 20px;
      border-radius: 60px;
      cursor: pointer;
      box-shadow: 0 16px 28px -8px rgba(37, 99, 235, 0.4);
      transition: all 0.2s;
      letter-spacing: 0.3px;
      margin-bottom: 12px;
    }

    .primary-btn:active {
      transform: scale(0.98);
      box-shadow: 0 8px 16px -6px rgba(37, 99, 235, 0.4);
    }

    /* 次要操作按钮 */
    .customer-sub-actions {
      display: flex;
      gap: 12px;
    }

    .sub-btn {
      flex: 1;
      background: #f1f5f9;
      border: none;
      padding: 14px 8px;
      border-radius: 40px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #1e293b;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      transition: background 0.2s, transform 0.1s;
      border: 1px solid #e2e8f0;
    }

    .sub-btn:active {
      transform: scale(0.97);
      background: #e2e8f0;
    }

    .sub-btn.call {
      background: #fff4e6;
      color: #e65100;
      border: 1px solid #ffd8a8;
    }

    .sub-btn.progress {
      background: #f5f3ff;
      border-color: #ddd6fe;
      color: #5b21b6;
    }

    /* 师傅触发区域 */
    .master-entry-wrapper {
      display: flex;
      justify-content: center;
      margin: 8px 0 2px;
    }

    .master-trigger-area {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 60px;
      padding: 12px 28px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 4px 10px -4px rgba(0, 0, 0, 0.05);
      transition: all 0.2s;
      user-select: none;
    }

    .master-trigger-area:active {
      background: #f8fafc;
      transform: scale(0.98);
    }

    .master-trigger-text {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 600;
      color: #334155;
      font-size: 1rem;
    }

    .dot {
      width: 6px;
      height: 6px;
      background: #94a3b8;
      border-radius: 50%;
      display: inline-block;
    }

    .master-trigger-area.active .dot {
      background: #2563eb;
    }

    .master-trigger-area.active .master-trigger-text {
      color: #2563eb;
    }

    /* 师傅面板（可展开） */
    .master-panel {
      max-height: 0;
      opacity: 0;
      overflow: hidden;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease, margin 0.3s;
      margin: 0 0 0;
      border-radius: 28px;
      background: white;
      box-shadow: 0 12px 24px -12px rgba(0, 0, 0, 0.08);
    }

    .master-panel.show {
      max-height: 520px;
      opacity: 1;
      margin: 4px 0 8px;
      border: 1px solid #eef2f6;
    }

    .master-panel-inner {
      padding: 22px 20px 18px;
    }

    .master-panel-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 10px;
      flex-wrap: wrap;
    }

    .master-panel-header .badge {
      background: #2563eb10;
      color: #2563eb;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 20px;
      border: 1px solid #bfdbfe;
    }

    .master-panel-header h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: #0f172a;
      letter-spacing: -0.01em;
    }

    .master-panel-desc {
      font-size: 0.85rem;
      color: #64748b;
      margin-bottom: 18px;
    }

    .master-actions {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-bottom: 16px;
    }

    .master-action-btn {
      padding: 16px 12px;
      border-radius: 16px;
      font-size: 14px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.2s;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 8px;
      letter-spacing: 0.3px;
      text-align: center;
      line-height: 1.3;
    }

    .master-action-btn.primary {
      background: #eff6ff;
      border-color: #bfdbfe;
      color: #1e40af;
    }

    .master-action-btn .btn-emoji {
      font-size: 1.4rem;
      line-height: 1;
      flex-shrink: 0;
    }

    .master-action-btn:active {
      background: #e2e8f0;
      transform: scale(0.98);
    }

    .master-action-btn.primary:active {
      background: #dbeafe;
    }

    .master-note {
      font-size: 0.8rem;
      color: #94a3b8;
      text-align: center;
      border-top: 1px dashed #e2e8f0;
      padding-top: 14px;
      margin-top: 6px;
    }

    /* ===== PC Hero 区域（手机端隐藏） ===== */
    .pc-hero {
      display: none;
      width: 100%;
      max-width: 1200px;
      padding: 40px 24px 60px;
      flex-direction: column;
      align-items: center;
    }

    .pc-hero-title {
      font-size: 4.2rem;
      font-weight: 800;
      letter-spacing: -0.03em;
      color: #0f172a;
      line-height: 1.1;
      text-align: center;
    }

    .pc-hero-subtitle {
      font-size: 1.3rem;
      color: #475569;
      margin-top: 16px;
      text-align: center;
      font-weight: 400;
    }

    .pc-entry-row {
      display: flex;
      gap: 32px;
      margin-top: 48px;
      width: 100%;
      justify-content: center;
      flex-wrap: wrap;
    }

    .pc-card {
      flex: 1 1 360px;
      max-width: 440px;
      background: white;
      border-radius: 36px;
      padding: 40px 32px 32px;
      box-shadow: 0 30px 50px -20px rgba(0, 0, 0, 0.15);
      position: relative;
      border: 1px solid #eef2f6;
      transition: transform 0.25s, box-shadow 0.3s;
      cursor: pointer;
      display: flex;
      flex-direction: column;
    }

    .pc-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 40px 60px -20px rgba(0, 0, 0, 0.2);
    }

    .pc-card.customer {
      border-top: 6px solid #2563eb;
    }

    .pc-card.master {
      border-top: 6px solid #8b5cf6;
    }

    .pc-badge {
      position: absolute;
      top: -12px;
      right: 32px;
      background: #22c55e;
      color: white;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 6px 18px;
      border-radius: 40px;
      letter-spacing: 0.5px;
      box-shadow: 0 8px 14px -6px rgba(34, 197, 94, 0.4);
    }

    .pc-card-icon {
      font-size: 3.2rem;
      line-height: 1;
      margin-bottom: 20px;
    }

    .pc-card-title {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #0f172a;
      margin-bottom: 12px;
    }

    .pc-card-desc {
      font-size: 1rem;
      color: #475569;
      line-height: 1.7;
      margin-bottom: 32px;
      flex: 1;
    }

    .pc-card-btn {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 1.2rem;
      color: #2563eb;
      padding: 12px 0 6px;
      border-top: 2px solid #eef2f6;
    }

    .pc-card.master .pc-card-btn {
      color: #7c3aed;
    }

    .pc-card-arrow {
      font-size: 1.6rem;
      transition: transform 0.2s;
    }

    .pc-card:hover .pc-card-arrow {
      transform: translateX(6px);
    }

    /* PC 底部信息条 */
    .pc-footer-bar {
      display: flex;
      justify-content: center;
      gap: 40px;
      margin-top: 72px;
      padding: 28px 40px;
      background: white;
      border-radius: 80px;
      box-shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.08);
      width: fit-content;
      border: 1px solid #eef2f6;
      flex-wrap: wrap;
    }

    .pc-footer-bar .item {
      font-size: 1rem;
      color: #334155;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .pc-footer-bar .item strong {
      color: #0f172a;
      margin-right: 4px;
    }

    /* ===== 页脚 ===== */
    .footer {
      width: 100%;
      text-align: center;
      padding: 32px 20px 28px;
      font-size: 0.8rem;
      color: #94a3b8;
      line-height: 1.8;
      margin-top: 8px;
      border-top: 1px solid #e2e8f0;
    }

    /* Toast */
    .demo-toast {
      position: fixed;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%) translateY(20px);
      background: #0f172a;
      color: white;
      padding: 14px 28px;
      border-radius: 60px;
      font-size: 0.95rem;
      font-weight: 500;
      box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.3);
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1);
      z-index: 1000;
      max-width: 90vw;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      pointer-events: none;
      letter-spacing: 0.2px;
      backdrop-filter: blur(4px);
      background: rgba(15, 23, 42, 0.92);
    }

    .demo-toast.visible {
      opacity: 1;
      visibility: visible;
      transform: translateX(-50%) translateY(0);
    }

    /* ===== 响应式切换 ===== */
    @media (min-width: 768px) {
      body {
        background: #ffffff;
        align-items: center;
      }

      .top-nav {
        display: flex;
      }

      .container {
        display: none;
      }

      .pc-hero {
        display: flex;
      }

      .footer {
        background: #f8fafc;
        max-width: 100%;
        border-top: 1px solid #e2e8f0;
      }
    }

    @media (max-width: 767px) {
      .pc-hero {
        display: none;
      }

      .top-nav {
        display: none;
      }

      .container {
        display: flex;
      }

      .footer {
        border-top: 1px solid #e2e8f0;
        background: transparent;
      }
    }

    /* 点击反馈 */
    button {
      -webkit-tap-highlight-color: transparent;
      font-family: inherit;
    }

    /* 小屏细节 */
    @media (max-width: 380px) {
      .primary-title {
        font-size: 1.5rem;
      }

      .master-actions {
        grid-template-columns: 1fr;
      }

      .sub-btn {
        font-size: 0.85rem;
        padding: 12px 6px;
      }

      .master-trigger-text {
        font-size: 0.9rem;
        gap: 8px;
      }
    }