/* roulang page: index */
:root {
      --color-dark: #0F141C;
      --color-dark-surface: #171E29;
      --color-primary: #FF5A1F;
      --color-primary-hover: #E04810;
      --color-accent: #00D68F;
      --color-bg-light: #F4F6F8;
      --color-white: #FFFFFF;
      --color-text-main: #1A202C;
      --color-text-muted: #4A5568;
      --color-text-light: #718096;
      --color-border: #E2E8F0;
      --radius-lg: 18px;
      --radius-md: 10px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 12px rgba(15, 20, 28, 0.05);
      --shadow-card: 0 10px 30px -10px rgba(15, 20, 28, 0.08);
      --shadow-hover: 0 20px 40px -15px rgba(255, 90, 31, 0.16);
      --shadow-glow: 0 0 25px rgba(255, 90, 31, 0.35);
      --transition: all 0.28s ease-in-out;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      padding: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--color-white);
      color: var(--color-text-main);
      line-height: 1.75;
      letter-spacing: -0.015em;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5 {
      color: var(--color-text-main);
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-top: 0;
    }

    p { margin-bottom: 1rem; color: var(--color-text-muted); }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }

    .site-topbar {
      background-color: #0B0E14;
      color: #A0AEC0;
      font-size: 0.8125rem;
      padding: 0.5rem 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .site-topbar .flex-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-contact-item { margin-right: 1.5rem; display: inline-flex; align-items: center; gap: 0.35rem; }
    .topbar-contact-item i { color: var(--color-primary); }

    .site-header {
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(10px);
      position: sticky;
      top: 0;
      z-index: 999;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
      padding: 0.85rem 0;
    }
    .header-nav { display: flex; align-items: center; justify-content: space-between; }
    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--color-dark);
    }
    .brand-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--color-primary), #FF8540);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.1rem;
      box-shadow: 0 4px 10px rgba(255, 90, 31, 0.3);
    }
    .nav-links { display: flex; list-style: none; margin: 0; padding: 0; gap: 1.75rem; align-items: center; }
    .nav-link-item a { font-weight: 600; font-size: 0.9375rem; color: #2D3748; }
    .nav-link-item a:hover { color: var(--color-primary); }
    .nav-cta-btn {
      background: var(--color-primary);
      color: #fff !important;
      padding: 0.55rem 1.25rem;
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(255, 90, 31, 0.25);
    }
    .nav-cta-btn:hover { background: var(--color-primary-hover); transform: translateY(-2px); }

    .sticky-pill-bar {
      background: #FFFFFF;
      border-bottom: 1px solid #EDF2F7;
      padding: 0.65rem 0;
      position: sticky;
      top: 61px;
      z-index: 900;
    }
    .pill-scroll-wrap {
      display: flex;
      gap: 0.65rem;
      overflow-x: auto;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
      padding: 2px 0;
    }
    .pill-scroll-wrap::-webkit-scrollbar { display: none; }
    .pill-item {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.4rem 1rem;
      border-radius: var(--radius-full);
      background: var(--color-bg-light);
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--color-text-muted);
      border: 1px solid transparent;
      transition: var(--transition);
    }
    .pill-item:hover, .pill-item.active {
      background: #FFF1EB;
      color: var(--color-primary);
      border-color: rgba(255, 90, 31, 0.25);
    }

    .hero-stage {
      position: relative;
      background: #0B0E14 url('/assets/images/8672d5d2659cb956.jpg') center/cover no-repeat;
      padding: 5.5rem 0 6.5rem;
      color: #FFFFFF;
      overflow: hidden;
    }
    .hero-stage::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11, 14, 20, 0.94) 0%, rgba(15, 20, 28, 0.88) 100%);
      z-index: 1;
    }
    .hero-content { position: relative; z-index: 2; }
    .badge-promo {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(255, 90, 31, 0.18);
      border: 1px solid rgba(255, 90, 31, 0.5);
      color: #FFA575;
      padding: 0.35rem 1rem;
      border-radius: var(--radius-full);
      font-size: 0.8125rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }
    .badge-promo .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--color-accent);
      box-shadow: 0 0 8px var(--color-accent);
    }
    .hero-stage h1 {
      color: #FFFFFF;
      font-size: 2.75rem;
      margin-bottom: 1.25rem;
      line-height: 1.2;
    }
    .hero-desc {
      font-size: 1.0625rem;
      color: #CBD5E0;
      line-height: 1.8;
      max-width: 620px;
      margin-bottom: 2rem;
    }
    .hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
    .btn-action-primary {
      background: linear-gradient(135deg, var(--color-primary), #FF7338);
      color: #FFFFFF !important;
      padding: 0.85rem 2rem;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 1rem;
      box-shadow: var(--shadow-glow);
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
    }
    .btn-action-primary:hover { transform: translateY(-2px); box-shadow: 0 0 35px rgba(255, 90, 31, 0.5); }
    .btn-action-secondary {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #FFFFFF !important;
      padding: 0.85rem 1.75rem;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 1rem;
      backdrop-filter: blur(4px);
    }
    .btn-action-secondary:hover { background: rgba(255, 255, 255, 0.2); }
    .hero-preview-box {
      background: rgba(23, 30, 41, 0.85);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 1rem;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
      backdrop-filter: blur(10px);
    }
    .hero-preview-box img { width: 100%; border-radius: calc(var(--radius-lg) - 6px); }

    .section-wrap { padding: 5.5rem 0; position: relative; }
    .section-bg-light { background-color: var(--color-bg-light); }
    .section-bg-white { background-color: var(--color-white); }
    .section-bg-dark { background-color: var(--color-dark); color: #FFFFFF; }
    
    .section-header { text-align: center; max-width: 760px; margin: 0 auto 3.5rem; }
    .section-header-badge {
      display: inline-block;
      padding: 0.3rem 0.85rem;
      background: #FFF0EB;
      color: var(--color-primary);
      border-radius: var(--radius-full);
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 0.85rem;
    }
    .section-bg-dark .section-header-badge {
      background: rgba(255, 90, 31, 0.2);
      color: #FF8F60;
    }
    .section-header h2 { font-size: 2.15rem; margin-bottom: 0.85rem; }
    .section-bg-dark .section-header h2 { color: #FFFFFF; }
    .section-header p { font-size: 0.95rem; line-height: 1.7; margin-bottom: 0; }
    .section-bg-dark .section-header p { color: #A0AEC0; }

    .app-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      border: 1px solid #EDF2F7;
      transition: var(--transition);
      position: relative;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .app-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(255, 90, 31, 0.2); }
    
    .metric-board-grid { margin-top: -2.5rem; position: relative; z-index: 10; }
    .metric-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 1.75rem 1.5rem;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
      border: 1px solid #F0F4F8;
      text-align: center;
    }
    .metric-value {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--color-dark);
      line-height: 1.1;
      margin-bottom: 0.25rem;
      font-feature-settings: "tnum";
    }
    .metric-value span { color: var(--color-primary); font-size: 1.4rem; }
    .metric-label { font-size: 0.875rem; color: var(--color-text-muted); font-weight: 600; margin-bottom: 0.35rem; }
    .metric-tag {
      display: inline-block;
      font-size: 0.72rem;
      padding: 2px 8px;
      border-radius: var(--radius-full);
      background: #E6FBF4;
      color: #00875A;
      font-weight: 700;
    }

    .pain-card {
      background: #FFF7F5;
      border: 1px solid #FFE6DF;
      border-radius: var(--radius-lg);
      padding: 2rem 1.75rem;
    }
    .pain-card .icon-box {
      width: 48px;
      height: 48px;
      background: rgba(255, 90, 31, 0.12);
      color: var(--color-primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 1.25rem;
    }
    .pain-card h4 { font-size: 1.2rem; margin-bottom: 0.65rem; }

    .contrast-card {
      border-radius: var(--radius-lg);
      padding: 2.2rem;
      height: 100%;
    }
    .contrast-bad {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
    }
    .contrast-good {
      background: linear-gradient(145deg, #1A2230 0%, #0F141C 100%);
      color: #FFFFFF;
      border: 1px solid rgba(255, 90, 31, 0.35);
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    }
    .contrast-good h4, .contrast-good p { color: #FFFFFF; }
    .contrast-list { list-style: none; margin: 1.5rem 0 0; padding: 0; }
    .contrast-list li {
      padding: 0.75rem 0;
      border-bottom: 1px dashed rgba(226, 232, 240, 0.6);
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 0.9375rem;
    }
    .contrast-good .contrast-list li { border-bottom-color: rgba(255, 255, 255, 0.1); color: #E2E8F0; }
    .contrast-bad i { color: #E53E3E; }
    .contrast-good i { color: var(--color-accent); }

    .spec-badge {
      display: inline-block;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      background: #EDF2F7;
      color: var(--color-text-main);
      font-size: 0.75rem;
      font-weight: 600;
      margin-right: 0.35rem;
      margin-bottom: 0.5rem;
    }

    .timeline-item {
      position: relative;
      padding-left: 2.5rem;
      border-left: 2px solid #E2E8F0;
      padding-bottom: 2.2rem;
    }
    .timeline-item::before {
      content: "";
      position: absolute;
      left: -9px;
      top: 0;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--color-primary);
      border: 3px solid #FFF;
      box-shadow: 0 0 0 2px var(--color-primary);
    }

    .sports-card {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      background: #fff;
    }
    .sports-card-img { height: 210px; object-fit: cover; width: 100%; }
    .sports-card-body { padding: 1.5rem; }

    .accordion {
      background: transparent;
      border: none;
    }
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-md) !important;
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .accordion-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--color-dark);
      padding: 1.25rem 1.5rem;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .accordion-title:hover, .accordion-title:focus {
      background: #FFF7F5;
      color: var(--color-primary);
    }
    .accordion-content {
      padding: 0 1.5rem 1.5rem;
      border: none;
      color: var(--color-text-muted);
      font-size: 0.9375rem;
      line-height: 1.8;
    }

    .form-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.08);
      border: 1px solid #EDF2F7;
    }
    .form-group { margin-bottom: 1.25rem; }
    .form-label { display: block; font-weight: 600; font-size: 0.875rem; margin-bottom: 0.4rem; color: var(--color-dark); }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      height: 48px;
      padding: 0.75rem 1rem;
      border: 1px solid #CBD5E0;
      border-radius: var(--radius-md);
      font-size: 0.9375rem;
      transition: var(--transition);
      background: #FAFAFA;
    }
    .form-textarea { height: 96px; resize: vertical; }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.2);
      outline: none;
      background: #FFFFFF;
    }
    .btn-submit {
      width: 100%;
      height: 50px;
      background: var(--color-primary);
      color: #FFFFFF;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-full);
      font-size: 1rem;
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(255, 90, 31, 0.3);
      transition: var(--transition);
    }
    .btn-submit:hover { background: var(--color-primary-hover); transform: translateY(-2px); }

    .site-footer {
      background: #0B0E14;
      color: #718096;
      padding: 4.5rem 0 2rem;
      font-size: 0.875rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-col h5 { color: #FFFFFF; font-size: 1rem; margin-bottom: 1.25rem; }
    .footer-links { list-style: none; margin: 0; padding: 0; }
    .footer-links li { margin-bottom: 0.65rem; }
    .footer-links a:hover { color: var(--color-primary); }
    .footer-bottom {
      margin-top: 3.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.8125rem;
      text-align: center;
      color: #4A5568;
    }

    .fixed-conversion-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(15, 20, 28, 0.95);
      backdrop-filter: blur(8px);
      border-top: 1px solid rgba(255, 90, 31, 0.35);
      z-index: 990;
      padding: 0.75rem 0;
      box-shadow: 0 -5px 20px rgba(0,0,0,0.25);
    }
    .conversion-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }
    .conversion-info { color: #FFFFFF; font-size: 0.9375rem; font-weight: 600; }
    .conversion-info span { color: var(--color-primary); margin-left: 0.5rem; font-size: 0.85rem; font-weight: normal; }

    @media (max-width: 1024px) {
      .hero-stage h1 { font-size: 2.25rem; }
      .section-wrap { padding: 4rem 0; }
    }
    @media (max-width: 768px) {
      .hero-stage { padding: 3.5rem 0 4.5rem; }
      .hero-stage h1 { font-size: 1.85rem; }
      .site-topbar { display: none; }
      .nav-links { display: none; }
      .fixed-conversion-bar { padding: 0.5rem 0; }
      .conversion-info { display: none; }
      .btn-action-primary, .btn-action-secondary { width: 100%; justify-content: center; }
    }