/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-hover: #0a3d8f;
      --accent: #00A896;
      --accent-hover: #028a7b;
      --dark: #0B192C;
      --dark-card: #15253b;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --border-color: #E2E8F0;
      --radius: 12px;
      --radius-sm: 6px;
      --shadow-sm: 0 2px 6px -1px rgba(0, 0, 0, 0.03);
      --shadow-md: 0 4px 20px -2px rgba(15, 82, 186, 0.06), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
      --shadow-hover: 0 12px 30px -4px rgba(15, 82, 186, 0.12);
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

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

    button, input, select, textarea {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      background: var(--dark);
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 7px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-meta-group {
      display: flex;
      gap: 20px;
    }

    .top-meta-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .main-nav-bar {
      padding: 16px 0;
    }

    .main-nav-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
    }

    .brand-logo-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.1rem;
      font-weight: 800;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      padding: 4px 0;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .nav-cta-btn {
      background: var(--primary);
      color: #FFFFFF;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      font-weight: 600;
      border: 1px solid var(--primary);
      box-shadow: 0 4px 10px rgba(15, 82, 186, 0.2);
    }

    .nav-cta-btn:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 14px rgba(15, 82, 186, 0.3);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 模块通用标准样式 */
    section {
      padding: 90px 0;
      position: relative;
    }

    .section-alt {
      background-color: var(--bg-light);
    }

    .section-dark {
      background-color: var(--dark);
      color: #FFFFFF;
    }

    .section-head {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px auto;
    }

    .section-head.head-left {
      text-align: left;
      margin: 0 0 40px 0;
      max-width: 100%;
    }

    .section-subtitle {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background: rgba(15, 82, 186, 0.08);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .section-dark .section-subtitle {
      color: var(--accent);
      background: rgba(0, 168, 150, 0.15);
    }

    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      line-height: 1.35;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-dark .section-title {
      color: #FFFFFF;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      gap: 8px;
      border: 1px solid transparent;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(15, 82, 186, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(15, 82, 186, 0.35);
    }

    .btn-outline {
      background: #FFFFFF;
      color: var(--primary);
      border-color: var(--border-color);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--bg-light);
      transform: translateY(-2px);
    }

    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
    }

    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
    }

    /* 板块 1: Hero 视频官网全宽遮罩样式 */
    .hero-section {
      position: relative;
      min-height: 640px;
      display: flex;
      align-items: center;
      color: #FFFFFF;
      overflow: hidden;
      padding: 100px 0;
      background: #0B192C url('/assets/images/ad5c47fba743c21d.webp') center/cover no-repeat;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11, 25, 44, 0.94) 0%, rgba(15, 82, 186, 0.85) 100%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 168, 150, 0.2);
      border: 1px solid var(--accent);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: #4EFAEE;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: #4EFAEE;
      text-decoration: underline;
      text-decoration-color: var(--accent);
      text-underline-offset: 8px;
    }

    .hero-intro {
      font-size: 1.125rem;
      line-height: 1.8;
      color: #E2E8F0;
      margin-bottom: 36px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .hero-media-card {
      position: relative;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.18);
      border-radius: var(--radius);
      padding: 16px;
      backdrop-filter: blur(12px);
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    }

    .hero-media-wrapper {
      position: relative;
      border-radius: 8px;
      overflow: hidden;
    }

    .hero-media-wrapper img {
      width: 100%;
      height: 290px;
      object-fit: cover;
    }

    .video-play-badge {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 64px;
      height: 64px;
      background: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.5rem;
      box-shadow: 0 0 0 10px rgba(15, 82, 186, 0.35);
      cursor: pointer;
      transition: var(--transition);
    }

    .video-play-badge:hover {
      transform: translate(-50%, -50%) scale(1.1);
      background: var(--accent);
    }

    .hero-stat-pill {
      margin-top: 14px;
      display: flex;
      justify-content: space-around;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding-top: 12px;
      text-align: center;
    }

    .hero-stat-item h4 {
      font-size: 1.2rem;
      color: #4EFAEE;
      font-weight: 700;
    }

    .hero-stat-item p {
      font-size: 0.75rem;
      color: #CBD5E1;
    }

    /* 板块 2: 产品价值 (双列架构) */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .arch-image-wrap {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .arch-image-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .arch-specs-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-top: 24px;
    }

    .arch-spec-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      background: var(--bg-white);
      padding: 16px 20px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .spec-icon {
      width: 38px;
      height: 38px;
      border-radius: 8px;
      background: rgba(15, 82, 186, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .spec-text h4 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .spec-text p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块 3: 功能展示 (优势矩阵 6卡片) */
    .feature-matrix {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }

    .feature-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-md);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(15, 82, 186, 0.3);
    }

    .feat-icon-badge {
      width: 46px;
      height: 46px;
      background: rgba(15, 82, 186, 0.08);
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .feature-card h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 12px;
      font-weight: 700;
    }

    .feature-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    /* 板块 4: 三步上手 (流程步骤) */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      position: relative;
    }

    .step-card {
      background: var(--bg-white);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-number {
      font-size: 2.4rem;
      font-weight: 800;
      color: rgba(15, 82, 186, 0.15);
      line-height: 1;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 5: 技术壁垒与方法体系 (Dark) */
    .dark-method-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .method-item {
      background: var(--dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 24px;
      border-top: 3px solid var(--accent);
    }

    .method-item h4 {
      font-size: 1.05rem;
      color: #FFFFFF;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .method-item p {
      font-size: 0.85rem;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 板块 6: 场景演示 (实战案例图文) */
    .scenario-list {
      display: flex;
      flex-direction: column;
      gap: 48px;
    }

    .scenario-item {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .scenario-item.reverse {
      grid-template-columns: 1fr 1fr;
      direction: rtl;
    }

    .scenario-item.reverse .scenario-text {
      direction: ltr;
    }

    .scenario-thumb {
      border-radius: 8px;
      overflow: hidden;
      height: 280px;
    }

    .scenario-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .scenario-tag {
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(0, 168, 150, 0.1);
      padding: 3px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .scenario-text h3 {
      font-size: 1.35rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .scenario-text p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .scenario-kpi {
      display: flex;
      gap: 24px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .kpi-unit strong {
      display: block;
      font-size: 1.35rem;
      color: var(--primary);
    }

    .kpi-unit span {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 板块 7: 关键指标统计通栏 */
    .metrics-strip {
      background: linear-gradient(135deg, #0F52BA, #0B192C);
      color: #FFFFFF;
      padding: 50px 0;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-box strong {
      display: block;
      font-size: 2.6rem;
      font-weight: 800;
      color: #4EFAEE;
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .metric-box p {
      font-size: 0.925rem;
      color: #E2E8F0;
    }

    /* 板块 8: 评价墙 (行业决策者社会认同) */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }

    .testimonial-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-content {
      font-size: 0.925rem;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .star-rating {
      color: #FFB800;
      font-size: 0.85rem;
      margin-bottom: 12px;
    }

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

    .author-avatar-ph {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--bg-light);
      border: 2px solid var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--primary);
    }

    .author-meta h4 {
      font-size: 0.925rem;
      color: var(--text-main);
    }

    .author-meta span {
      font-size: 0.775rem;
      color: var(--text-muted);
    }

    /* 板块 9: 裂变邀请/行业协同网络 (邀请机制) */
    .referral-box {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .referral-progress-wrap {
      margin: 20px 0;
    }

    .progress-bar-bg {
      background: var(--bg-light);
      border-radius: 10px;
      height: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      margin-bottom: 8px;
    }

    .progress-bar-fill {
      background: linear-gradient(90deg, var(--primary), var(--accent));
      height: 100%;
      width: 76%;
    }

    .progress-labels {
      display: flex;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .leaderboard-list {
      background: var(--bg-light);
      border-radius: 8px;
      padding: 16px;
      border: 1px solid var(--border-color);
    }

    .leader-row {
      display: flex;
      justify-content: space-between;
      padding: 8px 0;
      font-size: 0.85rem;
      border-bottom: 1px solid #E2E8F0;
    }

    .leader-row:last-child {
      border-bottom: none;
    }

    /* 板块 10: 前沿资讯与数字化动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .news-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }

    .news-img {
      height: 180px;
      overflow: hidden;
    }

    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .news-body {
      padding: 22px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .news-meta-pill {
      font-size: 0.75rem;
      color: var(--primary);
      margin-bottom: 8px;
      font-weight: 600;
    }

    .news-body h3 {
      font-size: 1.08rem;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.45;
    }

    .news-body p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 14px;
    }

    .read-more-anchor {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块 11: 常见异议手风琴 (FAQ) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-toggle {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-toggle span.icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.2s;
    }

    .faq-content {
      padding: 0 24px 20px 24px;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

    .faq-item.active .faq-content {
      display: block;
    }

    .faq-item.active .faq-toggle span.icon {
      transform: rotate(45deg);
    }

    /* 板块 12: 保障承诺条与转化表单 */
    .guarantees-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: 60px;
    }

    .guarantee-badge {
      display: flex;
      align-items: center;
      gap: 14px;
      background: var(--bg-white);
      padding: 20px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .guarantee-badge span.gb-icon {
      font-size: 1.6rem;
      color: var(--accent);
    }

    .guarantee-badge h4 {
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .guarantee-badge p {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    .form-wrapper {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 44px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
    }

    .form-info h3 {
      font-size: 1.65rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .form-info p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .contact-spec-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.875rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .form-fields {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .form-group.full {
      grid-column: span 2;
    }

    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      outline: none;
      transition: var(--transition);
      background: #FFFFFF;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(15, 82, 186, 0.1);
    }

    /* 底部固定悬浮条 */
    .fixed-floating-bar {
      position: fixed;
      bottom: -100px;
      left: 0;
      width: 100%;
      background: rgba(11, 25, 44, 0.95);
      backdrop-filter: blur(10px);
      color: #FFFFFF;
      padding: 14px 0;
      z-index: 999;
      box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
      transition: bottom 0.4s ease;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .fixed-floating-bar.show {
      bottom: 0;
    }

    .floating-bar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .floating-text h4 {
      font-size: 1rem;
      color: #FFFFFF;
    }

    .floating-text p {
      font-size: 0.8rem;
      color: #94A3B8;
    }

    /* 页脚规范 */
    .site-footer {
      background: var(--dark);
      color: #94A3B8;
      padding: 70px 0 24px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1rem;
      margin-bottom: 20px;
      font-weight: 600;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .footer-brand-title {
      font-size: 1.2rem;
      color: #FFFFFF;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-content {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .arch-grid, .referral-box, .form-wrapper {
        grid-template-columns: 1fr;
      }
      .feature-matrix, .steps-grid, .dark-method-flow, .metrics-grid, .testimonial-grid, .news-grid, .guarantees-bar, .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-item, .scenario-item.reverse {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 69px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 69px);
        background: #FFFFFF;
        flex-direction: column;
        align-items: flex-start;
        padding: 30px;
        transition: left 0.3s ease;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-menu.open {
        left: 0;
      }
      .nav-cta-btn {
        display: none;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      section {
        padding: 60px 0;
      }
      .feature-matrix, .steps-grid, .dark-method-flow, .metrics-grid, .testimonial-grid, .news-grid, .guarantees-bar, .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-fields {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .floating-bar-content {
        flex-direction: column;
        gap: 10px;
        text-align: center;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }