/* roulang page: index */
:root {
      --c-primary: #0F141C;
      --c-accent: #00E599;
      --c-accent-dark: #00B377;
      --c-secondary: #2563EB;
      --c-bg: #FAFAFC;
      --c-bg-card: #FFFFFF;
      --c-bg-dark: #0B0F17;
      --c-text-main: #1E293B;
      --c-text-muted: #64748B;
      --c-border: rgba(15, 20, 28, 0.08);
      --c-border-dark: rgba(255, 255, 255, 0.1);
      --shadow-sm: 0 4px 20px -2px rgba(15, 20, 28, 0.05);
      --shadow-lg: 0 16px 36px -4px rgba(0, 229, 153, 0.16);
      --radius: 14px;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: var(--font-stack);
      color: var(--c-text-main);
      background-color: var(--c-bg);
      line-height: 1.75;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a { text-decoration: none; color: inherit; transition: all 0.25s ease; }
    img { max-width: 100%; height: auto; display: block; }
    ul { list-style: none; }

    /* 全局容器与排版 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .section-wrap {
      padding: 96px 0;
      position: relative;
    }
    .section-wrap--dark {
      background-color: var(--c-bg-dark);
      color: #F8FAFC;
    }
    .section-wrap--alt {
      background-color: #F1F5F9;
    }
    .sec-header {
      margin-bottom: 56px;
    }
    .sec-header.text-center {
      text-align: center;
    }
    .sec-header .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(0, 229, 153, 0.12);
      color: #009664;
      font-size: 0.8125rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 16px;
      border: 1px solid rgba(0, 229, 153, 0.3);
      letter-spacing: 0.5px;
    }
    .section-wrap--dark .sec-header .badge-tag {
      background: rgba(0, 229, 153, 0.15);
      color: var(--c-accent);
      border-color: rgba(0, 229, 153, 0.35);
    }
    .sec-header h2 {
      font-size: 2.25rem;
      font-weight: 700;
      line-height: 1.3;
      color: inherit;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .sec-header p {
      font-size: 1.0625rem;
      color: var(--c-text-muted);
      max-width: 780px;
      line-height: 1.8;
      margin: 0;
    }
    .section-wrap--dark .sec-header p {
      color: #94A3B8;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 13px 28px;
      border-radius: 999px;
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      line-height: 1.2;
    }
    .btn-primary {
      background-color: var(--c-accent);
      color: #052417;
      border-color: var(--c-accent);
    }
    .btn-primary:hover {
      background-color: var(--c-accent-dark);
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
    }
    .btn-outline {
      background: transparent;
      color: var(--c-primary);
      border-color: rgba(15, 20, 28, 0.2);
    }
    .btn-outline:hover {
      background: rgba(15, 20, 28, 0.05);
      border-color: var(--c-primary);
    }
    .btn-outline-white {
      background: transparent;
      color: #ffffff;
      border-color: rgba(255, 255, 255, 0.25);
    }
    .btn-outline-white:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: var(--c-accent);
      color: var(--c-accent);
    }

    /* 顶部与吸顶导航 */
    .site-header {
      width: 100%;
      background: #FFFFFF;
      border-bottom: 1px solid var(--c-border);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 12px rgba(15, 20, 28, 0.03);
    }
    .top-bar-strip {
      background-color: #0F141C;
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-inner a {
      color: #CBD5E1;
      margin-left: 18px;
    }
    .top-bar-inner a:hover {
      color: var(--c-accent);
    }

    .main-nav-bar {
      padding: 14px 0;
    }
    .nav-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .logo-brand {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--c-primary);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.5px;
      white-space: nowrap;
    }
    .logo-brand span {
      display: inline-block;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--c-accent);
      box-shadow: 0 0 10px var(--c-accent);
    }

    /* 横向滑动 Chip 导航 */
    .nav-chip-scroll {
      display: flex;
      align-items: center;
      gap: 8px;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
      padding: 4px 2px;
    }
    .nav-chip-scroll::-webkit-scrollbar {
      display: none;
    }
    .chip-item {
      font-size: 0.875rem;
      font-weight: 500;
      padding: 7px 16px;
      border-radius: 999px;
      color: var(--c-text-muted);
      background-color: #F1F5F9;
      border: 1px solid transparent;
      transition: all 0.2s ease;
    }
    .chip-item:hover, .chip-item.active {
      background-color: var(--c-primary);
      color: var(--c-accent);
      border-color: var(--c-primary);
    }

    /* 板块 1: Hero 自然柔光大屏 */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #0F141C 0%, #151D2A 60%, #0B1119 100%);
      color: #FFFFFF;
      padding: 120px 0 100px;
      overflow: hidden;
    }
    .hero-section::before {
      content: '';
      position: absolute;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(0, 229, 153, 0.18) 0%, rgba(0, 229, 153, 0) 70%);
      top: -100px;
      right: -100px;
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      align-items: center;
      gap: 56px;
    }
    .hero-content h1 {
      font-size: 3.1rem;
      font-weight: 800;
      line-height: 1.22;
      letter-spacing: -1px;
      margin-bottom: 22px;
    }
    .hero-content h1 mark {
      background: none;
      color: var(--c-accent);
    }
    .hero-intro {
      font-size: 1.125rem;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 34px;
      max-width: 620px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .hero-chips-bar {
      display: flex;
      gap: 20px;
      border-top: 1px solid rgba(255,255,255,0.12);
      padding-top: 24px;
    }
    .hero-chip-stat span {
      display: block;
      font-size: 1.5rem;
      font-weight: 700;
      color: #FFFFFF;
      font-feature-settings: "tnum";
    }
    .hero-chip-stat label {
      font-size: 0.8125rem;
      color: #64748B;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .hero-visual-card {
      position: relative;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 20px;
      padding: 16px;
      backdrop-filter: blur(12px);
      box-shadow: 0 24px 60px rgba(0,0,0,0.4);
    }
    .hero-visual-card img {
      border-radius: 14px;
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .hero-floating-tag {
      position: absolute;
      bottom: 32px;
      left: 32px;
      background: rgba(15, 20, 28, 0.88);
      border: 1px solid rgba(0, 229, 153, 0.4);
      padding: 12px 20px;
      border-radius: 12px;
      backdrop-filter: blur(8px);
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .pulse-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--c-accent);
      box-shadow: 0 0 12px var(--c-accent);
      animation: pulseAnim 1.8s infinite ease-in-out;
    }
    @keyframes pulseAnim {
      0%, 100% { transform: scale(1); opacity: 1; }
      50% { transform: scale(1.4); opacity: 0.5; }
    }

    /* 板块 2: 能力概览 */
    .overview-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .overview-card {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      padding: 36px 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .overview-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 14px 30px -4px rgba(15, 20, 28, 0.08);
      border-color: rgba(0, 229, 153, 0.5);
    }
    .overview-card .num-mark {
      font-size: 2rem;
      font-weight: 800;
      color: #E2E8F0;
      margin-bottom: 14px;
      line-height: 1;
    }
    .overview-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--c-primary);
      margin-bottom: 12px;
    }
    .overview-card p {
      font-size: 0.9375rem;
      color: var(--c-text-muted);
      line-height: 1.7;
      margin: 0;
    }

    /* 板块 3: 行业场景 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .scene-item {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }
    .scene-item img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    .scene-item-body {
      padding: 32px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .scene-item-body h3 {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--c-primary);
    }
    .scene-item-body p {
      font-size: 0.9375rem;
      color: var(--c-text-muted);
      line-height: 1.75;
      margin-bottom: 20px;
    }
    .tag-row {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .tag-mini {
      font-size: 0.75rem;
      background: #F1F5F9;
      color: #475569;
      padding: 4px 10px;
      border-radius: 6px;
      font-weight: 500;
    }

    /* 板块 4: 方案矩阵 */
    .matrix-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .matrix-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .matrix-box {
      background: var(--c-bg-card);
      border-left: 4px solid var(--c-accent);
      padding: 24px;
      border-radius: 0 var(--radius) var(--radius) 0;
      box-shadow: var(--shadow-sm);
      border-top: 1px solid var(--c-border);
      border-right: 1px solid var(--c-border);
      border-bottom: 1px solid var(--c-border);
    }
    .matrix-box h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--c-primary);
      margin-bottom: 8px;
    }
    .matrix-box p {
      font-size: 0.9rem;
      color: var(--c-text-muted);
      margin: 0;
      line-height: 1.65;
    }

    /* 板块 5: 资质墙与权威参数速览 */
    .trust-strip-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .trust-box {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--c-border-dark);
      padding: 28px 20px;
      border-radius: var(--radius);
      text-align: center;
    }
    .trust-box .big-val {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--c-accent);
      margin-bottom: 8px;
      font-feature-settings: "tnum";
    }
    .trust-box .val-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 6px;
    }
    .trust-box .val-desc {
      font-size: 0.8125rem;
      color: #94A3B8;
      line-height: 1.5;
      margin: 0;
    }

    /* 板块 6: 交付流与协同机制 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .flow-step-item {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      padding: 30px 24px;
      position: relative;
    }
    .flow-num {
      width: 36px;
      height: 36px;
      background: var(--c-primary);
      color: var(--c-accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 20px;
    }
    .flow-step-item h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--c-primary);
      margin-bottom: 10px;
    }
    .flow-step-item p {
      font-size: 0.875rem;
      color: var(--c-text-muted);
      line-height: 1.65;
      margin: 0;
    }

    /* 板块 7: 成功案例 */
    .case-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .case-card {
      background: var(--c-bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .case-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .case-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .case-body h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--c-primary);
      margin-bottom: 10px;
    }
    .case-body p {
      font-size: 0.875rem;
      color: var(--c-text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .case-stat-badge {
      display: inline-block;
      font-size: 0.8125rem;
      color: #0F766E;
      background: #CCFBF1;
      padding: 4px 10px;
      border-radius: 6px;
      font-weight: 600;
    }

    /* 板块 8: 动态资讯研报 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-item {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      overflow: hidden;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-size: 0.8125rem;
      color: #94A3B8;
      margin-bottom: 8px;
    }
    .news-item h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--c-primary);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-item p {
      font-size: 0.875rem;
      color: var(--c-text-muted);
      line-height: 1.65;
      margin: 0;
    }

    /* 板块 9: 穿戴硬件生态对比表 */
    .spec-table-wrap {
      overflow-x: auto;
      background: var(--c-bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }
    .spec-table th, .spec-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--c-border);
    }
    .spec-table th {
      background: #F8FAFC;
      font-weight: 700;
      color: var(--c-primary);
      font-size: 0.9375rem;
    }
    .spec-table td {
      font-size: 0.875rem;
      color: var(--c-text-main);
    }
    .spec-table tr:last-child td {
      border-bottom: none;
    }

    /* 板块 10: 运动科研与竞技教练观点 */
    .quotes-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .quote-box {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--c-border-dark);
      border-radius: var(--radius);
      padding: 36px;
      position: relative;
    }
    .quote-box blockquote {
      font-size: 1.05rem;
      color: #E2E8F0;
      line-height: 1.8;
      margin: 0 0 20px 0;
      font-style: normal;
    }
    .quote-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 2px;
    }
    .author-info span {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    /* 板块 11: 平台技术与常见问题解答 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-card {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      overflow: hidden;
    }
    .faq-title {
      padding: 20px 26px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: var(--c-primary);
    }
    .faq-title::after {
      content: '+';
      font-size: 1.35rem;
      color: var(--c-text-muted);
      transition: transform 0.2s ease;
    }
    .faq-card.open .faq-title::after {
      content: '-';
      transform: rotate(180deg);
      color: var(--c-accent-dark);
    }
    .faq-answer {
      display: none;
      padding: 0 26px 22px;
      font-size: 0.9375rem;
      color: var(--c-text-muted);
      line-height: 1.75;
      border-top: 1px solid rgba(0,0,0,0.03);
    }
    .faq-card.open .faq-answer {
      display: block;
    }

    /* 板块 12: 方案联调与咨询表单 (收口) */
    .cta-lead-box {
      background: linear-gradient(135deg, #0F141C 0%, #17202E 100%);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: 24px;
      padding: 56px 48px;
      color: #FFFFFF;
      position: relative;
      box-shadow: 0 24px 60px rgba(0,0,0,0.3);
    }
    .cta-inner-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .cta-text h3 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: #FFFFFF;
      line-height: 1.3;
    }
    .cta-text p {
      font-size: 1rem;
      color: #94A3B8;
      line-height: 1.7;
      margin: 0;
    }
    .cta-form {
      background: rgba(255, 255, 255, 0.05);
      padding: 30px;
      border-radius: 16px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.8125rem;
      color: #CBD5E1;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      background: rgba(0, 0, 0, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 8px;
      padding: 12px 16px;
      color: #FFFFFF;
      font-size: 0.9rem;
      outline: none;
      transition: border-color 0.2s ease;
    }
    .form-control:focus {
      border-color: var(--c-accent);
    }
    .cta-form-btn {
      width: 100%;
      background: var(--c-accent);
      color: #052417;
      border: none;
      border-radius: 8px;
      padding: 14px;
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      transition: background 0.2s ease;
    }
    .cta-form-btn:hover {
      background: var(--c-accent-dark);
      color: #ffffff;
    }

    /* 页脚 */
    .site-footer {
      background-color: #0B0F17;
      color: #94A3B8;
      padding: 64px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 0.875rem;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 18px;
    }
    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 16px;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      color: #94A3B8;
    }
    .footer-col ul li a:hover {
      color: var(--c-accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
      color: #64748B;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .hero-content h1 { font-size: 2.5rem; }
      .matrix-layout { grid-template-columns: 1fr; }
      .trust-strip-grid { grid-template-columns: repeat(2, 1fr); }
      .flow-steps { grid-template-columns: repeat(2, 1fr); }
      .cta-inner-grid { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .section-wrap { padding: 64px 0; }
      .hero-section { padding: 80px 0 60px; }
      .sec-header h2 { font-size: 1.85rem; }
      .overview-grid { grid-template-columns: 1fr; }
      .scene-grid { grid-template-columns: 1fr; }
      .case-card-grid { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .quotes-grid { grid-template-columns: 1fr; }
      .top-bar-strip { display: none; }
      .cta-lead-box { padding: 36px 24px; }
      .footer-top { grid-template-columns: 1fr; }
    }
    @media (max-width: 480px) {
      .hero-content h1 { font-size: 2rem; }
      .trust-strip-grid { grid-template-columns: 1fr; }
      .flow-steps { grid-template-columns: 1fr; }
    }