/* roulang page: index */
:root {
      --deep-green: #0A1F1A;
      --neon-cyan: #00F0A8;
      --dark-neon: #00D896;
      --bg-gray: #F5F7F6;
      --card-white: #FFFFFF;
      --text-primary: #1A1A1A;
      --text-muted: #5A6A62;
      --border-light: #E8ECEA;
      --border-active: #00F0A8;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.03);
      --shadow-glow: 0 8px 20px rgba(0,240,168,0.3);
      --radius-card: 12px;
      --radius-btn: 40px;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --transition: 0.25s ease-out;
      --container-max: 1280px;
      --section-gap: 120px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-gray);
      color: var(--text-primary);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 32px;
    }
    h1, h2, h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      font-weight: 700;
      transition: var(--transition);
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 31, 26, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 16px 0;
      transition: background 0.3s;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.6rem;
      font-weight: 700;
      color: white;
      letter-spacing: -0.02em;
    }
    .logo-icon {
      width: 12px;
      height: 24px;
      background: var(--neon-cyan);
      border-radius: 3px;
      display: inline-block;
      box-shadow: 0 0 12px var(--neon-cyan);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
      color: rgba(255,255,255,0.85);
      font-weight: 500;
    }
    .nav-links a {
      color: rgba(255,255,255,0.8);
      font-size: 0.95rem;
    }
    .nav-links a:hover {
      color: var(--neon-cyan);
    }
    .btn-nav-cta {
      background: var(--neon-cyan);
      color: var(--deep-green) !important;
      padding: 10px 22px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(0,240,168,0.25);
    }
    .btn-nav-cta:hover {
      background: var(--dark-neon);
      box-shadow: var(--shadow-glow);
      transform: translateY(-1px);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: white;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--deep-green);
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 40px;
      z-index: 999;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s;
    }
    .mobile-menu.active {
      opacity: 1;
      pointer-events: auto;
    }
    .mobile-menu a {
      color: white;
      font-size: 1.8rem;
      font-weight: 600;
    }
    /* Hero */
    .hero {
      background: var(--deep-green);
      color: white;
      padding: 160px 0 100px;
      position: relative;
      overflow: hidden;
      min-height: 80vh;
      display: flex;
      align-items: center;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.12;
      z-index: 0;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-left .badge {
      display: inline-block;
      background: rgba(0,240,168,0.12);
      color: var(--neon-cyan);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.85rem;
      letter-spacing: 0.5px;
      margin-bottom: 24px;
      border: 1px solid rgba(0,240,168,0.3);
    }
    .hero h1 {
      font-size: 3.8rem;
      font-weight: 900;
      line-height: 1.15;
      margin-bottom: 20px;
      color: white;
      letter-spacing: -0.02em;
    }
    .cursor-blink {
      display: inline-block;
      width: 4px;
      height: 46px;
      background: var(--neon-cyan);
      margin-left: 6px;
      vertical-align: middle;
      animation: blink 1s infinite;
    }
    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: 0; }
    }
    .hero-desc {
      font-size: 1.15rem;
      color: rgba(255,255,255,0.7);
      max-width: 480px;
      margin-bottom: 36px;
      line-height: 1.6;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--neon-cyan);
      color: var(--deep-green);
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
    }
    .btn-primary:hover {
      background: var(--dark-neon);
      box-shadow: var(--shadow-glow);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 2px solid var(--neon-cyan);
      color: var(--neon-cyan);
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      background: transparent;
    }
    .btn-outline:hover {
      background: rgba(0,240,168,0.08);
      border-color: white;
      color: white;
    }
    .hero-right {
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .stadium-svg {
      width: 100%;
      max-width: 450px;
      opacity: 0.9;
    }
    .flow-line {
      stroke: var(--neon-cyan);
      stroke-width: 2;
      fill: none;
    }
    .data-dot {
      fill: var(--neon-cyan);
      filter: drop-shadow(0 0 6px #00F0A8);
    }
    /* 板块通用 */
    .section {
      padding: var(--section-gap) 0;
    }
    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--deep-green);
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--neon-cyan);
      border-radius: 2px;
    }
    .section-desc {
      color: var(--text-muted);
      max-width: 600px;
      margin-bottom: 48px;
      font-size: 1.1rem;
    }
    /* 解决方案卡片（差异化数据参数） */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .solution-card {
      background: var(--card-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 36px 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .solution-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-6px);
      box-shadow: 0 12px 28px rgba(0,0,0,0.04);
    }
    .card-icon-row {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 24px;
    }
    .icon-circle {
      width: 40px;
      height: 40px;
      background: rgba(0,240,168,0.1);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      font-size: 1.4rem;
    }
    .card-title {
      font-size: 1.5rem;
      font-weight: 700;
    }
    .card-desc {
      color: var(--text-muted);
      margin: 12px 0 20px;
      line-height: 1.6;
    }
    .text-link {
      color: var(--neon-cyan);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: auto;
    }
    .text-link:hover {
      gap: 12px;
      color: var(--dark-neon);
    }
    /* 实时数据看板 */
    .performance-panel {
      background: var(--deep-green);
      border-radius: 28px;
      padding: 50px 40px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      color: white;
      position: relative;
      overflow: hidden;
    }
    .perf-bg-grid {
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(0,240,168,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(0,240,168,0.05) 1px, transparent 1px);
      background-size: 40px 40px;
      animation: gridMove 15s linear infinite;
    }
    @keyframes gridMove {
      0% { transform: translate(0,0); }
      100% { transform: translate(40px,40px); }
    }
    .stat-item {
      position: relative;
      z-index: 2;
      text-align: center;
    }
    .stat-number {
      font-size: 3.4rem;
      font-weight: 700;
      color: var(--neon-cyan);
      line-height: 1;
    }
    .stat-label {
      font-size: 1rem;
      color: rgba(255,255,255,0.7);
      margin-top: 8px;
    }
    /* 客户证言 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px;
      display: flex;
      flex-direction: column;
    }
    .testimonial-text {
      font-style: italic;
      color: var(--text-primary);
      margin-bottom: 20px;
    }
    .client-info {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: auto;
    }
    .client-avatar {
      width: 44px;
      height: 44px;
      background: #E0E8E4;
      border-radius: 50%;
      overflow: hidden;
    }
    /* FAQ 手风琴 */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-left: 3px solid transparent;
      padding-left: 20px;
      margin-bottom: 20px;
      transition: 0.2s;
    }
    .faq-item.active {
      border-left: 4px solid var(--neon-cyan);
    }
    .faq-question {
      font-weight: 700;
      font-size: 1.15rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      background: #F5F7F6;
      margin-top: 12px;
      border-radius: 10px;
      padding: 0 16px;
      color: var(--text-muted);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px;
    }
    /* CTA */
    .cta-band {
      background: var(--deep-green);
      text-align: center;
      padding: 80px 20px;
      border-radius: 36px;
      color: white;
    }
    .cta-band h2 {
      font-size: 2.5rem;
      color: white;
    }
    /* 页脚 */
    .footer {
      background: var(--deep-green);
      color: #8A9B92;
      padding: 60px 0 30px;
      margin-top: 80px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer a {
      color: #8A9B92;
      display: block;
      margin-bottom: 10px;
    }
    .footer a:hover {
      color: var(--neon-cyan);
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.08);
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 0.9rem;
    }
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; text-align: center; }
      .hero-desc { margin: 0 auto 30px; }
      .solutions-grid { grid-template-columns: 1fr 1fr; }
      .testimonials-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 2.5rem; }
      .solutions-grid, .performance-panel, .footer-grid { grid-template-columns: 1fr; }
      .section { padding: 80px 0; }
    }