/* roulang page: index */
:root {
      --c-dark-bg: #0B0D0E;
      --c-dark-surface: #111315;
      --c-dark-card: #1A1D20;
      --c-light-bg: #F8FAFC;
      --c-white: #FFFFFF;
      --c-text-main: #1E293B;
      --c-text-muted: #64748B;
      --c-text-light: #94A3B8;
      --c-text-inverse: #F8FAFC;
      --c-neon: #10B981;
      --c-neon-bright: #CCFF00;
      --c-border: #E2E8F0;
      --c-border-dark: rgba(255, 255, 255, 0.08);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-soft: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
      --shadow-card: 0 10px 30px -4px rgba(0, 0, 0, 0.08);
      --shadow-neon: 0 0 20px rgba(16, 185, 129, 0.25);
      --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      text-size-adjust: 100%;
      color: var(--c-text-main);
      background-color: var(--c-white);
    }

    body {
      line-height: 1.65;
      font-size: 16px;
      overflow-x: hidden;
    }

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

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

    button, input {
      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: 999;
      width: 100%;
      background: rgba(17, 19, 21, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border-dark);
    }

    .micro-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: var(--c-text-light);
      padding: 6px 0;
    }

    .micro-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .micro-tags {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .status-dot {
      display: inline-block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--c-neon);
      margin-right: 6px;
      box-shadow: 0 0 8px var(--c-neon);
    }

    .main-nav-bar {
      padding: 14px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo-symbol {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--c-neon) 0%, var(--c-neon-bright) 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: var(--c-dark-bg);
      font-size: 18px;
    }

    .logo-text {
      color: var(--c-white);
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.5px;
    }

    .logo-text span {
      color: var(--c-neon-bright);
      font-weight: 400;
      font-size: 14px;
      margin-left: 6px;
      border-left: 1px solid rgba(255, 255, 255, 0.2);
      padding-left: 8px;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }

    .nav-links a {
      color: #CBD5E1;
      font-size: 15px;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }

    .nav-links a:hover, .nav-links a.active {
      color: var(--c-white);
    }

    .nav-links a:hover::after, .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--c-neon);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition-base);
      white-space: nowrap;
    }

    .btn-neon {
      background: var(--c-neon);
      color: #042F2E;
    }

    .btn-neon:hover {
      background: #059669;
      color: #ffffff;
      box-shadow: var(--shadow-neon);
      transform: translateY(-2px);
    }

    .btn-outline-light {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.25);
      color: var(--c-white);
    }

    .btn-outline-light:hover {
      border-color: var(--c-white);
      background: rgba(255, 255, 255, 0.05);
      transform: translateY(-2px);
    }

    .btn-outline-dark {
      background: transparent;
      border-color: var(--c-border);
      color: var(--c-text-main);
    }

    .btn-outline-dark:hover {
      border-color: var(--c-text-main);
      background: #F1F5F9;
      transform: translateY(-2px);
    }

    .btn-dark {
      background: var(--c-dark-surface);
      color: var(--c-white);
    }

    .btn-dark:hover {
      background: #2D3748;
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 14px 30px;
      font-size: 16px;
    }

    /* 移动端菜单开关 */
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: var(--c-white);
      font-size: 24px;
      cursor: pointer;
      width: 44px;
      height: 44px;
    }

    /* 通用Section规范 */
    section {
      padding: 96px 0;
      position: relative;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--c-neon);
      margin-bottom: 12px;
      background: rgba(16, 185, 129, 0.1);
      padding: 4px 12px;
      border-radius: 99px;
    }

    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--c-text-muted);
      line-height: 1.8;
      max-width: 760px;
    }

    .section-head {
      margin-bottom: 54px;
    }

    .section-head.center {
      text-align: center;
    }

    .section-head.center .section-desc {
      margin-left: auto;
      margin-right: auto;
    }

    /* 1. Hero 板块（5:7 错位视觉） */
    .hero-section {
      background-color: var(--c-dark-bg);
      background-image: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 60%), linear-gradient(180deg, #111315 0%, #0B0D0E 100%);
      color: var(--c-text-inverse);
      padding: 80px 0 100px 0;
      border-bottom: 1px solid var(--c-border-dark);
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content {
      position: relative;
      z-index: 2;
    }

    .hero-h1 {
      font-size: 48px;
      font-weight: 900;
      line-height: 1.18;
      letter-spacing: -1px;
      margin-bottom: 24px;
      color: #FFFFFF;
    }

    .hero-h1 em {
      font-style: normal;
      background: linear-gradient(135deg, #FFFFFF 30%, var(--c-neon-bright) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-p {
      font-size: 16px;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .metric-item .val {
      font-size: 26px;
      font-weight: 800;
      color: var(--c-neon-bright);
      font-family: monospace, sans-serif;
    }

    .metric-item .lbl {
      font-size: 13px;
      color: #64748B;
      margin-top: 4px;
    }

    .hero-stage {
      position: relative;
    }

    .hero-visual-frame {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.12);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
      background: #1A1D20;
    }

    .hero-img {
      width: 100%;
      height: 480px;
      object-fit: cover;
      filter: saturate(1.1);
    }

    .hero-overlay-card {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      background: rgba(17, 19, 21, 0.85);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

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

    .pulsing-indicator {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--c-neon);
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.9); opacity: 0.8; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
      70% { transform: scale(1.1); opacity: 1; box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
      100% { transform: scale(0.9); opacity: 0.8; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }

    /* 2. 骑行瓶颈与痛点诊断区 */
    .pain-section {
      background-color: var(--c-light-bg);
      border-bottom: 1px solid var(--c-border);
    }

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

    .pain-card {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-soft);
      transition: var(--transition-base);
    }

    .pain-card:hover {
      transform: translateY(-4px);
      border-color: #CBD5E1;
      box-shadow: var(--shadow-card);
    }

    .pain-num {
      font-size: 14px;
      font-weight: 800;
      color: #EF4444;
      background: rgba(239, 68, 68, 0.08);
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 16px;
    }

    .pain-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--c-text-main);
    }

    .pain-desc {
      font-size: 14px;
      color: var(--c-text-muted);
      line-height: 1.7;
    }

    /* 3. 算法模型与核心定位区 */
    .overview-section {
      background-color: var(--c-white);
    }

    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }

    .overview-visual {
      position: relative;
    }

    .overview-img-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-card);
    }

    .overview-badge-float {
      position: absolute;
      top: -20px;
      right: -20px;
      background: var(--c-dark-surface);
      color: var(--c-white);
      padding: 16px 22px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.1);
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    }

    .overview-badge-float .val {
      font-size: 24px;
      font-weight: 800;
      color: var(--c-neon-bright);
    }

    .overview-badge-float .lbl {
      font-size: 12px;
      color: var(--c-text-light);
    }

    .tech-specs-table {
      margin-top: 32px;
      border-top: 1px solid var(--c-border);
      padding-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .spec-item .name {
      font-size: 13px;
      color: var(--c-text-muted);
      margin-bottom: 4px;
    }

    .spec-item .param {
      font-size: 16px;
      font-weight: 700;
      color: var(--c-text-main);
    }

    /* 4. AI 核心驱动优势区 */
    .strength-section {
      background-color: var(--c-light-bg);
      border-top: 1px solid var(--c-border);
      border-bottom: 1px solid var(--c-border);
    }

    .strength-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .strength-card {
      background: var(--c-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--c-border);
      padding: 32px 28px;
      transition: var(--transition-base);
    }

    .strength-card:hover {
      border-color: var(--c-neon);
      transform: translateY(-4px);
      box-shadow: var(--shadow-card);
    }

    .strength-icon {
      width: 44px;
      height: 44px;
      background: rgba(16, 185, 129, 0.1);
      color: var(--c-neon);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .strength-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .strength-desc {
      font-size: 14px;
      color: var(--c-text-muted);
      line-height: 1.7;
    }

    /* 5. 热门定制训练方案 */
    .plan-section {
      background-color: var(--c-white);
    }

    .plan-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .plan-card {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition-base);
    }

    .plan-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card);
    }

    .plan-card.featured {
      background: var(--c-dark-surface);
      color: var(--c-white);
      border-color: var(--c-neon);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    }

    .plan-card.featured .plan-desc {
      color: #94A3B8;
    }

    .plan-card.featured .plan-target {
      color: var(--c-neon-bright);
    }

    .plan-badge-top {
      position: absolute;
      top: -12px;
      right: 28px;
      background: linear-gradient(135deg, var(--c-neon) 0%, var(--c-neon-bright) 100%);
      color: #0B0D0E;
      font-size: 12px;
      font-weight: 800;
      padding: 4px 14px;
      border-radius: 99px;
      text-transform: uppercase;
    }

    .plan-name {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .plan-desc {
      font-size: 14px;
      color: var(--c-text-muted);
      margin-bottom: 24px;
      line-height: 1.6;
    }

    .plan-metrics-box {
      border-top: 1px dashed var(--c-border);
      border-bottom: 1px dashed var(--c-border);
      padding: 20px 0;
      margin-bottom: 24px;
    }

    .plan-card.featured .plan-metrics-box {
      border-color: rgba(255, 255, 255, 0.15);
    }

    .plan-row {
      display: flex;
      justify-content: space-between;
      font-size: 14px;
      margin-bottom: 8px;
    }

    .plan-row:last-child {
      margin-bottom: 0;
    }

    .plan-label {
      color: var(--c-text-muted);
    }

    .plan-card.featured .plan-label {
      color: var(--c-text-light);
    }

    .plan-val {
      font-weight: 700;
    }

    .plan-features-list {
      list-style: none;
      margin-bottom: 32px;
      font-size: 14px;
    }

    .plan-features-list li {
      margin-bottom: 10px;
      display: flex;
      gap: 10px;
      align-items: center;
    }

    /* 6. 四步训练工作流 */
    .flow-section {
      background-color: var(--c-light-bg);
      border-top: 1px solid var(--c-border);
      border-bottom: 1px solid var(--c-border);
    }

    .flow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .flow-step-card {
      background: var(--c-white);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      border: 1px solid var(--c-border);
      position: relative;
    }

    .flow-num-badge {
      font-size: 13px;
      font-weight: 800;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--c-dark-surface);
      color: var(--c-neon-bright);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .flow-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .flow-desc {
      font-size: 14px;
      color: var(--c-text-muted);
      line-height: 1.7;
    }

    /* 7. 深色极客与训练哲学 */
    .philosophy-section {
      background-color: var(--c-dark-bg);
      color: var(--c-white);
      padding: 110px 0;
      border-top: 1px solid var(--c-border-dark);
      border-bottom: 1px solid var(--c-border-dark);
      background-image: radial-gradient(circle at 10% 90%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
    }

    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .terminal-box {
      background: #000000;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    }

    .terminal-header {
      background: #16181A;
      padding: 10px 16px;
      display: flex;
      gap: 8px;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .term-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .dot-red { background: #FF5F56; }
    .dot-yellow { background: #FFBD2E; }
    .dot-green { background: #27C93F; }

    .terminal-body {
      padding: 24px;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 13px;
      line-height: 1.8;
      color: #94A3B8;
    }

    .term-line-active {
      color: var(--c-neon-bright);
    }

    .term-tag {
      color: #38BDF8;
    }

    .term-comment {
      color: #64748B;
    }

    /* 8. 真实用户进阶故事 */
    .stories-section {
      background-color: var(--c-white);
    }

    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }

    .story-card {
      background: var(--c-light-bg);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .story-img-container {
      height: 240px;
      position: relative;
      overflow: hidden;
    }

    .story-img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .story-card:hover .story-img {
      transform: scale(1.04);
    }

    .story-rider-tag {
      position: absolute;
      top: 16px;
      left: 16px;
      background: rgba(17, 19, 21, 0.85);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 4px;
      backdrop-filter: blur(4px);
    }

    .story-body {
      padding: 32px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .story-quote {
      font-size: 15px;
      color: var(--c-text-main);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .story-gains-row {
      display: flex;
      gap: 24px;
      border-top: 1px solid var(--c-border);
      padding-top: 20px;
    }

    .gain-item .gain-val {
      font-size: 20px;
      font-weight: 800;
      color: #059669;
      font-family: monospace, sans-serif;
    }

    .gain-item .gain-lbl {
      font-size: 12px;
      color: var(--c-text-muted);
    }

    /* 9. 关键数据指标统计条 */
    .metrics-bar-section {
      background: var(--c-dark-surface);
      color: var(--c-white);
      padding: 64px 0;
      border-top: 1px solid var(--c-border-dark);
      border-bottom: 1px solid var(--c-border-dark);
    }

    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .metric-block .num {
      font-size: 44px;
      font-weight: 900;
      color: var(--c-neon);
      font-family: monospace, sans-serif;
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .metric-block .text {
      font-size: 14px;
      color: var(--c-text-light);
      font-weight: 500;
    }

    /* 10. 车友社群与专业评价 */
    .testimonial-section {
      background-color: var(--c-light-bg);
      border-bottom: 1px solid var(--c-border);
    }

    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .testimonial-card {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .stars-line {
      color: #EAB308;
      font-size: 14px;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }

    .testimonial-content {
      font-size: 14px;
      color: var(--c-text-main);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .user-profile {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #F1F5F9;
      padding-top: 18px;
    }

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--c-text-main);
      font-size: 14px;
    }

    .user-meta .name {
      font-size: 15px;
      font-weight: 700;
      color: var(--c-text-main);
    }

    .user-meta .role {
      font-size: 12px;
      color: var(--c-text-muted);
    }

    /* 11. 骑行科学与资讯摘要 */
    .articles-section {
      background-color: var(--c-white);
    }

    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .article-card {
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition-base);
      display: flex;
      flex-direction: column;
    }

    .article-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card);
      border-color: #CBD5E1;
    }

    .article-thumb-wrap {
      height: 190px;
      overflow: hidden;
    }

    .article-thumb {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .article-card:hover .article-thumb {
      transform: scale(1.05);
    }

    .article-info {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-meta {
      font-size: 12px;
      color: var(--c-text-muted);
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
    }

    .article-h3 {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.45;
      margin-bottom: 12px;
      color: var(--c-text-main);
    }

    .article-sum {
      font-size: 13px;
      color: var(--c-text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }

    .article-link {
      font-size: 13px;
      font-weight: 700;
      color: #059669;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 12. FAQ 折叠面板 */
    .faq-section {
      background-color: var(--c-light-bg);
      border-top: 1px solid var(--c-border);
      border-bottom: 1px solid var(--c-border);
    }

    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }

    .faq-item:last-child {
      margin-bottom: 0;
    }

    .faq-question {
      padding: 22px 28px;
      font-size: 17px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      transition: background-color 0.2s ease;
    }

    .faq-question:hover {
      background-color: #F8FAFC;
    }

    .faq-icon-arrow {
      font-size: 18px;
      transition: transform 0.25s ease;
      color: var(--c-text-muted);
    }

    .faq-item.active .faq-icon-arrow {
      transform: rotate(180deg);
      color: var(--c-neon);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background-color: var(--c-white);
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      border-top-color: #F1F5F9;
      max-height: 300px;
    }

    .faq-answer-inner {
      padding: 20px 28px 24px;
      font-size: 14px;
      color: var(--c-text-muted);
      line-height: 1.75;
    }

    /* 13. 底部强转化闭环 */
    .cta-banner-section {
      background-color: var(--c-dark-bg);
      background-image: radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.12) 0%, transparent 70%);
      color: var(--c-white);
      text-align: center;
      padding: 100px 0;
      position: relative;
    }

    .cta-container {
      max-width: 740px;
      margin: 0 auto;
    }

    .cta-h2 {
      font-size: 38px;
      font-weight: 900;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }

    .cta-desc {
      font-size: 16px;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 36px;
    }

    .cta-form-box {
      display: flex;
      gap: 12px;
      max-width: 520px;
      margin: 0 auto;
    }

    .cta-input {
      flex-grow: 1;
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(255, 255, 255, 0.05);
      color: #FFFFFF;
      font-size: 15px;
      outline: none;
      transition: border-color 0.2s;
    }

    .cta-input:focus {
      border-color: var(--c-neon);
      background: rgba(255, 255, 255, 0.1);
    }

    /* 页脚设计 */
    .site-footer {
      background-color: #070809;
      color: var(--c-text-light);
      padding: 80px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 48px;
      margin-bottom: 60px;
    }

    .footer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 16px;
    }

    .footer-logo .brand-txt {
      font-size: 18px;
      font-weight: 700;
      color: #FFFFFF;
    }

    .footer-about-text {
      line-height: 1.7;
      color: #64748B;
      font-size: 13px;
      margin-bottom: 20px;
    }

    .footer-heading {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .footer-links-list {
      list-style: none;
    }

    .footer-links-list li {
      margin-bottom: 12px;
    }

    .footer-links-list a {
      color: #94A3B8;
      transition: color 0.2s;
    }

    .footer-links-list a:hover {
      color: var(--c-neon);
    }

    .trust-badge-row {
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 13px;
      color: #64748B;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: #475569;
    }

    .footer-copy a {
      color: #64748B;
    }

    .footer-copy a:hover {
      color: #94A3B8;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-img {
        height: 380px;
      }
      .pain-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .overview-grid {
        grid-template-columns: 1fr;
      }
      .flow-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .philosophy-grid {
        grid-template-columns: 1fr;
      }
      .metrics-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .micro-bar {
        display: none;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #111315;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
      }
      .hero-h1 {
        font-size: 34px;
      }
      .section-title {
        font-size: 26px;
      }
      .strength-grid, .plan-grid, .stories-grid, .testimonial-grid, .article-grid {
        grid-template-columns: 1fr;
      }
      .cta-form-box {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }

    @media (max-width: 520px) {
      .pain-grid, .flow-grid, .metrics-row {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
    }