/* ==================== 全局重置 & 变量 ==================== */
    :root {
      --color-primary: #165DFF;
      --color-primary-dark: #0E42D2;
      --color-primary-light: #E8F3FF;
      --color-orange: #FF7D00;
      --color-orange-light: #FFF7E8;
      --color-green: #00B42A;
      --color-green-light: #E8FFEA;
      --color-dark: #1D2129;
      --color-gray: #4E5969;
      --color-gray-light: #86909C;
      --color-bg: #F7F8FA;
      --color-white: #FFFFFF;
      --color-border: #E5E6EB;
      --radius: 12px;
      --radius-sm: 8px;
      --shadow: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(22,93,255,0.12);
      --max-width: 1200px;
      --transition: all 0.3s ease;
    }

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

    html { scroll-behavior: smooth; }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      font-size: 14px;
      line-height: 1.6;
      color: var(--color-dark);
      background: var(--color-bg);
    }

    a { text-decoration: none; color: inherit; }
    ul { list-style: none; }
    img { max-width: 100%; display: block; }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    .section { padding: 80px 0; }
    .section-gray { background: var(--color-bg); }
    .section-white { background: var(--color-white); }

    .section-title {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-title h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--color-dark);
      margin-bottom: 12px;
    }
    .section-title p {
      font-size: 14px;
      color: var(--color-gray-light);
    }

    /* ==================== 导航栏 ==================== */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 64px;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
      z-index: 1000;
      transition: var(--transition);
    }
    .navbar.scrolled {
      box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    }
    .navbar .container {
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 18px;
      font-weight: 700;
      color: var(--color-dark);
    }
    .nav-logo .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
    }
    .nav-menu {
      display: flex;
      gap: 32px;
    }
    .nav-menu a {
      font-size: 14px;
      color: var(--color-gray);
      transition: var(--transition);
      position: relative;
    }
    .nav-menu a:hover { color: var(--color-primary); }
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--color-primary);
      transition: var(--transition);
    }
    .nav-menu a:hover::after { width: 100%; }
    .nav-actions {
      display: flex;
      gap: 12px;
      align-items: center;
    }
    .btn {
      /* display: inline-flex; */
      align-items: center;
      gap: 6px;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      border: none;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--color-primary);
      color: #fff;
    }
    .btn-primary:hover {
      background: var(--color-primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(22,93,255,0.3);
    }
    .btn-outline {
      background: transparent;
      color: var(--color-primary);
      border: 1px solid var(--color-primary);
    }
    .btn-outline:hover {
      background: var(--color-primary-light);
    }
    .btn-lg { padding: 14px 36px; font-size: 16px; }
    .btn-green { background: var(--color-green); color: #fff; }
    .btn-green:hover { background: #009A24; }

    /* ==================== Hero 区域 ==================== */
    .hero {
      min-height: 600px;
      background: linear-gradient(135deg, #0E1B33 0%, #16224A 40%, #1A2D5C 100%);
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
      padding-top: 64px;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background-image:
        radial-gradient(circle at 20% 30%, rgba(22,93,255,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255,125,0,0.08) 0%, transparent 50%);
    }
    .hero::after {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 10 L40 20 L30 30 L20 20 Z' fill='none' stroke='%23165DFF' stroke-width='0.5' opacity='0.15'/%3E%3C/svg%3E");
      opacity: 0.3;
    }
    .hero .container {
      position: relative;
      z-index: 1;
      text-align: center;
    }
    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(22,93,255,0.2);
      border: 1px solid rgba(22,93,255,0.4);
      border-radius: 20px;
      font-size: 12px;
      color: #6BA6FF;
      margin-bottom: 24px;
    }
    .hero h1 {
      font-size: 42px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .hero h1 .highlight { color: var(--color-orange); }
    .hero .subtitle {
      font-size: 16px;
      color: rgba(255,255,255,0.7);
      margin-bottom: 12px;
    }
    .hero .keywords {
      font-size: 18px;
      color: #6BA6FF;
      font-weight: 600;
      margin-bottom: 36px;
      letter-spacing: 2px;
    }
    .hero .keywords span { margin: 0 8px; }
    .hero-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
    }
    .hero-stats {
      display: flex;
      gap: 48px;
      justify-content: center;
      margin-top: 60px;
      padding-top: 40px;
      border-top: 1px solid rgba(255,255,255,0.1);
    }
    .hero-stat-item {
      text-align: center;
    }
    .hero-stat-item .num {
      font-size: 32px;
      font-weight: 700;
      color: #fff;
    }
    .hero-stat-item .label {
      font-size: 12px;
      color: rgba(255,255,255,0.5);
      margin-top: 4px;
    }

    /* ==================== 核心价值四大模块 ==================== */
    .value-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .value-card {
      background: var(--color-white);
      border-radius: var(--radius);
      padding: 32px 24px;
      box-shadow: var(--shadow);
      transition: var(--transition);
      border: 1px solid var(--color-border);
      position: relative;
      overflow: hidden;
    }
    .value-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--color-primary);
    }
    .value-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 4px;
    }
    .value-card:nth-child(1)::before { background: var(--color-primary); }
    .value-card:nth-child(2)::before { background: var(--color-orange); }
    .value-card:nth-child(3)::before { background: var(--color-green); }
    .value-card:nth-child(4)::before { background: #722ED1; }
    .value-icon {
      width: 56px;
      height: 56px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      margin-bottom: 20px;
    }
    .value-card:nth-child(1) .value-icon { background: var(--color-primary-light); color: var(--color-primary); }
    .value-card:nth-child(1) .value-icon.value-icon-img {
      background: var(--color-white);
      padding: 0;
      overflow: hidden;
      border: 1px solid var(--color-border);
    }
    .value-card:nth-child(1) .value-icon.value-icon-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .value-card:nth-child(2) .value-icon { background: var(--color-orange-light); color: var(--color-orange); }
    .value-card:nth-child(3) .value-icon { background: var(--color-green-light); color: var(--color-green); }
    .value-card:nth-child(4) .value-icon { background: #F5E8FF; color: #722ED1; }
    .value-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--color-dark);
    }
    .value-card .desc {
      font-size: 13px;
      color: var(--color-gray);
      margin-bottom: 16px;
      line-height: 1.7;
    }
    .value-card ul li {
      font-size: 13px;
      color: var(--color-gray);
      padding: 4px 0;
      padding-left: 20px;
      position: relative;
    }
    .value-card ul li::before {
      content: '';
      position: absolute;
      left: 0;
      top: 10px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--color-primary);
    }

    /* ==================== 技术能力区块 ==================== */
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
    }
    .tech-card {
      background: var(--color-white);
      border-radius: var(--radius);
      padding: 28px 20px;
      text-align: center;
      border: 1px solid var(--color-border);
      transition: var(--transition);
    }
    .tech-card:hover {
      border-color: var(--color-primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }
    .tech-icon {
      width: 48px;
      height: 48px;
      margin: 0 auto 16px;
      background: var(--color-primary-light);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--color-primary);
    }
    .tech-card h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--color-dark);
      margin-bottom: 8px;
    }
    .tech-card p {
      font-size: 12px;
      color: var(--color-gray-light);
    }

    /* ==================== 适用客户场景 ==================== */
    .customer-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .customer-card {
      background: var(--color-white);
      border-radius: var(--radius);
      padding: 36px 28px;
      box-shadow: var(--shadow);
      transition: var(--transition);
      border-top: 3px solid var(--color-primary);
    }
    .customer-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .customer-card:nth-child(2) { border-top-color: var(--color-orange); }
    .customer-card:nth-child(3) { border-top-color: var(--color-green); }
    .customer-icon {
      font-size: 36px;
      margin-bottom: 20px;
    }
    .customer-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .customer-card .role {
      font-size: 12px;
      color: var(--color-gray-light);
      margin-bottom: 16px;
    }
    .customer-card p {
      font-size: 13px;
      color: var(--color-gray);
      line-height: 1.8;
    }

    /* ==================== 痛点对比 ==================== */
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--color-white);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
    }
    .compare-table th {
      padding: 18px 24px;
      font-size: 15px;
      font-weight: 700;
      text-align: left;
    }
    .compare-table th:first-child {
      background: var(--color-bg);
      color: var(--color-gray);
      width: 15%;
    }
    .compare-table th:nth-child(2) {
      background: #FFF1F0;
      color: #F53F3F;
      width: 42.5%;
    }
    .compare-table th:nth-child(3) {
      background: var(--color-primary-light);
      color: var(--color-primary);
      width: 42.5%;
    }
    .compare-table td {
      padding: 18px 24px;
      font-size: 14px;
      border-top: 1px solid var(--color-border);
    }
    .compare-table td:first-child {
      background: var(--color-bg);
      font-weight: 600;
      color: var(--color-gray);
      text-align: center;
    }
    .compare-table td:nth-child(2) { color: var(--color-gray); }
    .compare-table td:nth-child(3) { color: var(--color-dark); font-weight: 500; }
    .compare-table .icon-cross { color: #F53F3F; margin-right: 8px; }
    .compare-table .icon-check { color: var(--color-green); margin-right: 8px; }

    /* ==================== 价值总结 ==================== */
    .value-summary {
      background: linear-gradient(135deg, #0E1B33 0%, #16224A 100%);
      border-radius: var(--radius);
      padding: 60px 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .value-summary::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: radial-gradient(circle at 50% 50%, rgba(22,93,255,0.1) 0%, transparent 70%);
    }
    .value-summary h2 {
      position: relative;
      font-size: 26px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .value-summary p {
      position: relative;
      font-size: 15px;
      color: rgba(255,255,255,0.6);
      margin-bottom: 32px;
    }
    .value-keywords {
      position: relative;
      display: flex;
      gap: 24px;
      justify-content: center;
    }
    .value-keyword {
      padding: 12px 32px;
      border: 1px solid rgba(22,93,255,0.4);
      border-radius: 24px;
      font-size: 16px;
      font-weight: 600;
      color: #6BA6FF;
    }

    /* ==================== 表单区块 ==================== */
    .contact-form-wrapper {
      max-width: 640px;
      margin: 0 auto;
      background: var(--color-white);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 500;
      color: var(--color-gray);
      margin-bottom: 8px;
    }
    .form-group label .required { color: #F53F3F; }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-family: inherit;
      transition: var(--transition);
      outline: none;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px rgba(22,93,255,0.1);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    .form-submit {
      width: 100%;
      padding: 14px;
      font-size: 16px;
    }

    /* ==================== 页脚 ==================== */
    .footer {
      background: #1D2129;
      color: rgba(255,255,255,0.6);
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 32px;
    }
    .footer-brand .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-brand .logo .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--color-primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.8;
    }
    .footer-col h4 {
      font-size: 14px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-col ul li {
      font-size: 13px;
      padding: 4px 0;
    }
    .footer-col ul li a:hover { color: var(--color-primary); }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 24px;
      text-align: center;
      font-size: 12px;
    }

    /* ==================== 用户反馈按钮 ==================== */
    .feedback-btn {
      position: fixed;
      right: 24px;
      bottom: 24px;
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: var(--color-primary);
      color: #fff;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 16px rgba(22,93,255,0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      z-index: 999;
      transition: var(--transition);
    }
    .feedback-btn:hover {
      transform: scale(1.1);
      background: var(--color-primary-dark);
    }
    .feedback-btn .feedback-tooltip {
      position: absolute;
      right: 60px;
      white-space: nowrap;
      background: var(--color-dark);
      color: #fff;
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 12px;
      opacity: 0;
      pointer-events: none;
      transition: var(--transition);
    }
    .feedback-btn:hover .feedback-tooltip { opacity: 1; }

    /* ==================== 反馈弹窗 ==================== */
    .modal-overlay {
      position: fixed;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(0,0,0,0.45);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 2000;
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .modal-overlay.active {
      display: flex;
      opacity: 1;
    }
    .modal {
      background: var(--color-white);
      border-radius: var(--radius);
      width: 480px;
      max-width: 90vw;
      max-height: 90vh;
      overflow-y: auto;
      box-shadow: 0 20px 60px rgba(0,0,0,0.2);
      transform: translateY(20px);
      transition: transform 0.3s ease;
    }
    .modal-overlay.active .modal { transform: translateY(0); }
    .modal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 24px 28px;
      border-bottom: 1px solid var(--color-border);
    }
    .modal-header h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--color-dark);
    }
    .modal-close {
      width: 32px;
      height: 32px;
      border: none;
      background: var(--color-bg);
      border-radius: 50%;
      cursor: pointer;
      font-size: 18px;
      color: var(--color-gray);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }
    .modal-close:hover {
      background: #F2F3F5;
      color: var(--color-dark);
    }
    .modal-body { padding: 28px; }
    .modal-body .form-group { margin-bottom: 20px; }
    .feedback-type-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 8px;
    }
    .feedback-type-btn {
      padding: 10px 8px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      background: var(--color-white);
      cursor: pointer;
      font-size: 12px;
      text-align: center;
      transition: var(--transition);
      color: var(--color-gray);
    }
    .feedback-type-btn:hover { border-color: var(--color-primary); }
    .feedback-type-btn.active {
      border-color: var(--color-primary);
      background: var(--color-primary-light);
      color: var(--color-primary);
      font-weight: 600;
    }
    .modal-footer {
      padding: 16px 28px 24px;
      display: flex;
      gap: 12px;
      justify-content: flex-end;
    }
    .modal-footer .btn { flex: 1; justify-content: center; }

    .modal-success {
      text-align: center;
      padding: 48px 28px;
    }
    .modal-success .success-icon {
      width: 64px;
      height: 64px;
      margin: 0 auto 20px;
      background: var(--color-green-light);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 32px;
      color: var(--color-green);
    }
    .modal-success h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .modal-success p {
      font-size: 14px;
      color: var(--color-gray);
    }

    /* ==================== 商务合作 / 推广活动 ==================== */
    .promotion-time-badge {
      display: inline-block;
      margin-top: 16px;
      padding: 8px 20px;
      background: linear-gradient(135deg, #FF7D00 0%, #FF9F43 100%);
      color: #fff;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(255,125,0,0.2);
    }

    .promo-card {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: var(--transition);
      border: 1px solid var(--color-border);
    }
    .promo-card:hover {
      box-shadow: var(--shadow-hover);
    }

    .promo-card-primary {
      background: linear-gradient(135deg, #E8F3FF 0%, #FFFFFF 60%);
      border-top: 4px solid var(--color-primary);
    }

    .promo-card-orange {
      background: linear-gradient(135deg, #FFF7E8 0%, #FFFFFF 60%);
      border-top: 4px solid var(--color-orange);
    }

    .promo-card-header {
      padding: 28px 36px 0;
    }
    .promo-card-header h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--color-dark);
      margin-top: 12px;
    }

    .promo-badge {
      display: inline-block;
      padding: 6px 16px;
      background: var(--color-primary);
      color: #fff;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
    }
    .promo-badge-orange {
      background: linear-gradient(135deg, #FF7D00 0%, #FF9F43 100%);
    }

    .promo-card-body {
      padding: 28px 36px 32px;
    }

    /* 福利一：注册送礼 */
    .promo-main-reward {
      display: flex;
      align-items: baseline;
      gap: 16px;
      margin-bottom: 28px;
      padding: 24px;
      background: #fff;
      border-radius: var(--radius-sm);
      border: 1px dashed var(--color-primary);
    }
    .promo-main-reward .reward-num {
      font-size: 56px;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1;
    }
    .promo-main-reward .reward-num span {
      font-size: 24px;
      font-weight: 600;
      margin-left: 4px;
    }
    .promo-main-reward .reward-text {
      font-size: 20px;
      font-weight: 600;
      color: var(--color-dark);
    }

    .promo-features {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 28px;
    }
    .promo-feature {
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }
    .promo-feature-icon {
      font-size: 20px;
      flex-shrink: 0;
    }
    .promo-feature-title {
      font-size: 14px;
      font-weight: 600;
      color: var(--color-dark);
      margin-bottom: 4px;
    }
    .promo-feature-desc {
      font-size: 12px;
      color: var(--color-gray-light);
      line-height: 1.6;
    }

    .promo-action {
      text-align: center;
    }

    /* 福利二：平台标签 */
    .promo-platforms {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 28px;
    }
    .platform-tag {
      display: inline-block;
      padding: 8px 18px;
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 20px;
      font-size: 13px;
      color: var(--color-gray);
      font-weight: 500;
      transition: var(--transition);
    }
    .platform-tag:hover {
      border-color: var(--color-orange);
      color: var(--color-orange);
      background: var(--color-orange-light);
    }
    .platform-tag-more {
      background: var(--color-orange-light);
      border-color: var(--color-orange);
      color: var(--color-orange);
      font-weight: 600;
    }

    /* 奖励阶梯表 */
    .promo-reward-table {
      background: #fff;
      border-radius: var(--radius-sm);
      overflow: hidden;
      border: 1px solid var(--color-border);
      margin-bottom: 28px;
    }
    .reward-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      padding: 16px 24px;
      border-bottom: 1px solid var(--color-border);
      transition: var(--transition);
    }
    .reward-row:last-child { border-bottom: none; }
    .reward-row:hover { background: var(--color-bg); }

    .reward-row-header {
      background: linear-gradient(135deg, #FFF7E8 0%, #FFEFE0 100%);
      font-weight: 700;
      color: var(--color-orange);
      font-size: 14px;
    }
    .reward-row > div { display: flex; align-items: center; }
    .reward-row > div:last-child { justify-content: flex-end; font-weight: 500; color: var(--color-dark); }
    .play-count { font-size: 18px; }
    .play-count strong { color: var(--color-primary); font-size: 24px; }
    .vip-time { font-size: 16px; }
    .vip-time strong { color: var(--color-orange); font-size: 22px; }
    .vip-year { color: var(--color-green); font-weight: 600; margin-left: 6px; font-size: 14px; }

    .reward-row-best {
      background: linear-gradient(135deg, #FF7D00 0%, #FF9F43 100%);
      color: #fff !important;
      position: relative;
    }
    .reward-row-best .play-count { color: #fff; }
    .reward-row-best .play-count strong { color: #fff; }
    .reward-row-best .vip-time { color: rgba(255,255,255,0.95); }
    .reward-row-best .vip-time strong { color: #fff; }
    .reward-row-best .vip-year { color: #FFF3CD; }
    .best-tag {
      display: inline-block;
      padding: 2px 10px;
      background: rgba(255,255,255,0.25);
      border-radius: 10px;
      font-size: 12px;
      font-weight: 600;
      margin-left: 8px;
      color: #fff;
    }

    /* 参与步骤 */
    .promo-steps {
      background: #fff;
      border-radius: var(--radius-sm);
      padding: 28px 24px;
      border: 1px solid var(--color-border);
      margin-bottom: 28px;
    }
    .step-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--color-dark);
      margin-bottom: 20px;
    }
    .step-list {
      display: flex;
      align-items: stretch;
      gap: 8px;
    }
    .step-item {
      flex: 1;
      display: flex;
      gap: 12px;
      align-items: flex-start;
      padding: 16px 12px;
      background: var(--color-bg);
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }
    .step-item:hover {
      background: var(--color-primary-light);
    }
    .step-num {
      width: 32px;
      height: 32px;
      background: var(--color-primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      flex-shrink: 0;
    }
    .step-name {
      font-size: 14px;
      font-weight: 600;
      color: var(--color-dark);
      margin-bottom: 4px;
    }
    .step-desc {
      font-size: 12px;
      color: var(--color-gray-light);
      line-height: 1.6;
    }
    .step-arrow {
      display: flex;
      align-items: center;
      font-size: 20px;
      color: var(--color-orange);
      font-weight: 700;
      padding: 0 4px;
    }

    /* 备案号 */
    .footer-icp {
      margin-top: 10px;
      font-size: 12px;
      color: rgba(255,255,255,0.4);
    }
    .footer-icp a {
      color: rgba(255,255,255,0.5);
      transition: var(--transition);
    }
    .footer-icp a:hover {
      color: var(--color-primary);
    }

    /* ==================== 立即体验：公共加密测试视频 ==================== */
    .try-card {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .try-col {
      background: var(--color-white);
      border-radius: var(--radius);
      padding: 32px 28px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .try-col:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .try-col-download { border-top: 4px solid var(--color-primary); }
    .try-col-password { border-top: 4px solid var(--color-orange); }
    .try-col-steps    { border-top: 4px solid var(--color-green); }

    .try-col-icon {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 26px;
      margin-bottom: 18px;
    }
    .try-col-download .try-col-icon { background: var(--color-primary-light); color: var(--color-primary); }
    .try-col-password .try-col-icon { background: var(--color-orange-light); color: var(--color-orange); }
    .try-col-steps    .try-col-icon { background: var(--color-green-light);  color: var(--color-green); }

    .try-col-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--color-dark);
      margin-bottom: 6px;
    }
    .try-col-desc {
      font-size: 13px;
      color: var(--color-gray-light);
      margin-bottom: 20px;
      line-height: 1.7;
    }

    /* 下载文件卡片 */
    .try-file-card {
      background: linear-gradient(135deg, #E8F3FF 0%, #FFFFFF 80%);
      border: 1px dashed var(--color-primary);
      border-radius: var(--radius-sm);
      padding: 18px;
      display: flex;
      gap: 16px;
      align-items: center;
      cursor: pointer;
      transition: var(--transition);
    }
    .try-file-card:hover {
      background: var(--color-primary-light);
      border-style: solid;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(22,93,255,0.12);
    }
    .try-file-icon {
      width: 56px;
      height: 56px;
      flex-shrink: 0;
      background: var(--color-primary);
      color: #fff;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
    }
    .try-file-info { flex: 1; min-width: 0; }
    .try-file-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--color-dark);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .try-file-meta {
      font-size: 12px;
      color: var(--color-gray-light);
      margin-top: 4px;
    }
    .try-download-btn {
      flex-shrink: 0;
      padding: 8px 14px;
      background: var(--color-primary);
      color: #fff;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 600;
      transition: var(--transition);
    }
    .try-file-card:hover .try-download-btn {
      background: var(--color-primary-dark);
    }
    .try-note {
      margin-top: 14px;
      font-size: 12px;
      color: var(--color-gray);
      padding: 10px 14px;
      background: var(--color-bg);
      border-radius: var(--radius-sm);
      line-height: 1.7;
    }

    /* 密码卡片 */
    .try-password-card {
      background: linear-gradient(135deg, #FFF7E8 0%, #FFFFFF 80%);
      border: 1px solid var(--color-orange);
      border-radius: var(--radius-sm);
      padding: 20px;
    }
    .try-password-label {
      font-size: 13px;
      color: var(--color-gray);
      margin-bottom: 10px;
      font-weight: 500;
    }
    .try-password-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .try-password-value {
      flex: 1;
      padding: 12px 16px;
      background: #fff;
      border: 2px dashed var(--color-orange);
      border-radius: var(--radius-sm);
      font-family: "Consolas", "Courier New", monospace;
      font-size: 18px;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--color-orange);
      text-align: center;
      user-select: all;
      min-width: 0;
      overflow-x: auto;
    }
    .btn-copy {
      flex-shrink: 0;
      padding: 10px 16px;
      font-size: 13px;
      white-space: nowrap;
    }
    .try-password-tips {
      border-top: 1px dashed var(--color-border);
      padding-top: 12px;
    }
    .try-password-tips > div {
      font-size: 12px;
      color: var(--color-gray);
      padding: 3px 0;
      line-height: 1.7;
    }

    /* 步骤列表 */
    .try-step-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      flex: 1;
    }
    .try-step-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      padding: 14px;
      background: var(--color-green-light);
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }
    .try-step-item:hover { background: #D7F8DC; }
    .try-step-num {
      width: 28px;
      height: 28px;
      flex-shrink: 0;
      background: var(--color-green);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 13px;
    }
    .try-step-content { flex: 1; min-width: 0; }
    .try-step-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--color-dark);
      margin-bottom: 4px;
    }
    .try-step-desc {
      font-size: 12px;
      color: var(--color-gray);
      line-height: 1.7;
    }
    .btn-sm { padding: 6px 14px; font-size: 12px; }

    /* 重要提示条 */
    .try-warn-card {
      margin-top: 28px;
      background: #FFF3CD;
      border-left: 4px solid #FF9F43;
      border-radius: var(--radius-sm);
      padding: 20px 24px;
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .try-warn-icon {
      font-size: 22px;
      flex-shrink: 0;
    }
    .try-warn-content {
      font-size: 13px;
      color: #8A6D1B;
      line-height: 1.8;
    }
    .try-warn-content strong { color: #6B5013; }

    /* ==================== 滚动动画 ==================== */
    .fade-in {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ==================== 响应式 ==================== */
    @media (max-width: 1024px) {
      .value-grid { grid-template-columns: repeat(2, 1fr); }
      .tech-grid { grid-template-columns: repeat(3, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .promo-features { grid-template-columns: 1fr 1fr; }
      .step-list { flex-wrap: wrap; }
      .step-arrow { display: none; }
      .try-card { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hero h1 { font-size: 28px; }
      .hero .keywords { font-size: 14px; }
      .hero-stats { flex-wrap: wrap; gap: 24px; }
      .value-grid { grid-template-columns: 1fr; }
      .tech-grid { grid-template-columns: repeat(2, 1fr); }
      .customer-grid { grid-template-columns: 1fr; }
      .form-row { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .section { padding: 48px 0; }
      .section-title h2 { font-size: 22px; }
      .compare-table { font-size: 12px; }
      .compare-table th, .compare-table td { padding: 12px; }
      /* 推广模块移动端 */
      .promo-card-header { padding: 20px 20px 0; }
      .promo-card-header h3 { font-size: 18px; }
      .promo-card-body { padding: 20px; }
      .promo-main-reward { flex-direction: column; align-items: flex-start; gap: 8px; padding: 16px; }
      .promo-main-reward .reward-num { font-size: 40px; }
      .promo-main-reward .reward-text { font-size: 16px; }
      .promo-features { grid-template-columns: 1fr; }
      .reward-row { padding: 12px 16px; }
      .play-count { font-size: 14px; }
      .play-count strong { font-size: 18px; }
      .vip-time { font-size: 14px; }
      .vip-time strong { font-size: 16px; }
      .promo-steps { padding: 20px 16px; }
      .step-list { flex-direction: column; }
      .step-item { width: 100%; }
      /* 立即体验模块移动端 */
      .try-card { grid-template-columns: 1fr; gap: 16px; }
      .try-col { padding: 24px 20px; }
      .try-file-card { flex-wrap: wrap; }
      .try-password-row { flex-wrap: wrap; }
      .try-password-value { width: 100%; }
      .btn-copy { width: 100%; justify-content: center; }
      .try-warn-card { flex-direction: column; align-items: flex-start; padding: 16px; }
    }