/* roulang page: index */
/* 全局设计变量 */
    :root {
      --primary-green: #00E676;
      --primary-amber: #FF9100;
      --deep-black: #0B0F19;
      --card-bg: rgba(20, 25, 35, 0.6);
      --glass-border: rgba(0, 230, 118, 0.15);
      --text-white: #FFFFFF;
      --text-gray: #B0B8C1;
      --text-light-gray: #8A919F;
      --radius-lg: 16px;
      --radius-xl: 30px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-glow: 0 0 20px rgba(0,230,118,0.5);
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
      --font-mono: 'Roboto Mono', 'Courier New', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    
    body {
      background-color: var(--deep-black);
      color: var(--text-gray);
      font-family: var(--font-sans);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      background-image: 
        linear-gradient(rgba(11, 15, 25, 0.92), rgba(11, 15, 25, 0.98)),
        url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 60 60"><path d="M30 5 L55 30 L30 55 L5 30 Z" fill="none" stroke="rgba(0,230,118,0.08)" stroke-width="1"/><circle cx="30" cy="30" r="15" fill="none" stroke="rgba(255,145,0,0.04)" stroke-width="1"/></svg>');
      background-size: 60px 60px;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    
    /* 排版基础 */
    h1, h2, h3, h4 {
      color: var(--text-white);
      font-weight: 700;
      line-height: 1.25;
    }
    h1 { font-size: 3rem; letter-spacing: -0.5px; }
    h2 { font-size: 2.25rem; }
    h3 { font-size: 1.5rem; }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    
    img {
      max-width: 100%;
      display: block;
    }
    
    button, .btn {
      cursor: pointer;
      border: none;
      outline: none;
      font-family: var(--font-sans);
    }
    
    /* 导航栏 - 沉浸式透明磨砂 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      padding: 16px 0;
      transition: all 0.4s ease;
      background: rgba(11, 15, 25, 0.4);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255,255,255,0.04);
    }
    
    .header.scrolled {
      background: rgba(11, 15, 25, 0.85);
      padding: 10px 0;
      box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-green);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
    }
    .logo i {
      font-size: 2rem;
      margin-right: 8px;
      color: var(--primary-green);
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
    }
    
    .nav-links a {
      color: var(--text-gray);
      font-weight: 500;
      position: relative;
      padding: 8px 0;
      font-size: 1rem;
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-green);
      transition: width 0.3s ease;
    }
    
    .nav-links a:hover {
      color: var(--primary-green);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    
    .btn-nav-cta {
      background: var(--primary-green);
      color: #000 !important;
      padding: 10px 24px !important;
      border-radius: 30px;
      font-weight: 700;
      box-shadow: 0 4px 12px rgba(0,230,118,0.3);
      margin-left: 16px;
    }
    .btn-nav-cta:hover {
      box-shadow: var(--shadow-glow);
      transform: translateY(-1px);
    }
    
    .mobile-menu-toggle {
      display: none;
      font-size: 1.8rem;
      color: var(--primary-green);
    }
    
    /* 首屏 Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      padding-top: 80px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(90deg, rgba(11,15,25,0.92) 0%, rgba(11,15,25,0.7) 55%, rgba(11,15,25,0.4) 100%);
      z-index: 1;
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      gap: 40px;
    }
    
    .hero-text {
      flex: 1 1 50%;
    }
    .hero-text h1 {
      font-size: 3.5rem;
      background: linear-gradient(to right, #fff, #c8ffb0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 20px;
    }
    .hero-text p {
      font-size: 1.3rem;
      color: #ccd6e0;
      margin-bottom: 36px;
      max-width: 500px;
    }
    
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-green);
      color: #000;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 30px;
      font-size: 1.1rem;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 15px rgba(0,230,118,0.35);
    }
    .btn-primary:hover {
      box-shadow: var(--shadow-glow);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid rgba(255,255,255,0.3);
      color: #fff;
      padding: 14px 36px;
      border-radius: 30px;
      font-weight: 600;
      transition: var(--transition-smooth);
    }
    .btn-outline:hover {
      background: rgba(0,230,118,0.15);
      border-color: var(--primary-green);
    }
    
    .hero-visual {
      flex: 1 1 45%;
      display: flex;
      justify-content: flex-end;
    }
    .data-card-float {
      background: rgba(20, 25, 35, 0.7);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(0,230,118,0.3);
      border-radius: 20px;
      padding: 20px 28px;
      width: 300px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
      animation: float 6s infinite ease-in-out;
    }
    .live-badge {
      background: var(--primary-amber);
      color: #000;
      font-weight: 700;
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 15px;
      letter-spacing: 1px;
    }
    .match-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin: 12px 0;
      font-family: var(--font-mono);
    }
    .score {
      font-size: 1.4rem;
      font-weight: 700;
      color: #fff;
    }
    .chart-line {
      height: 3px;
      background: linear-gradient(90deg, #00E676, #FF9100);
      border-radius: 4px;
      margin: 14px 0;
    }
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-15px); }
      100% { transform: translateY(0px); }
    }
    
    /* 区块通用 */
    section {
      padding: 90px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }
    .section-title h2 {
      margin-bottom: 12px;
    }
    .section-title p {
      color: var(--text-light-gray);
      font-size: 1.2rem;
    }
    
    /* 核心服务卡片 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 36px 24px;
      transition: var(--transition-smooth);
      box-shadow: var(--shadow-card);
    }
    .feature-card:hover {
      border-color: var(--primary-green);
      transform: translateY(-8px);
      box-shadow: 0 15px 35px rgba(0,230,118,0.2);
    }
    .feature-icon {
      font-size: 2.6rem;
      color: var(--primary-green);
      margin-bottom: 18px;
    }
    .feature-card h3 {
      margin-bottom: 10px;
    }
    
    /* 实时数据横向滚动 */
    .stats-scroll {
      display: flex;
      gap: 30px;
      overflow-x: auto;
      padding: 24px 0 12px;
      scrollbar-width: thin;
      scrollbar-color: var(--primary-green) #1a1f2b;
    }
    .stat-item {
      flex: 0 0 180px;
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary-green);
    }
    .stat-label {
      color: var(--text-light-gray);
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    
    /* 产品方案左右交替 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 50px;
      margin-bottom: 70px;
    }
    .solution-img {
      flex: 1;
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .solution-img img {
      width: 100%;
      height: auto;
    }
    .solution-text {
      flex: 1;
    }
    
    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: rgba(255,255,255,0.03);
      border-left: 4px solid var(--primary-green);
      padding: 20px 24px;
      border-radius: 0 12px 12px 0;
      transition: background 0.2s;
    }
    .faq-item h4 {
      margin-bottom: 8px;
      color: #fff;
    }
    
    /* CTA */
    .cta-dark {
      background: #05080f;
      text-align: center;
      padding: 80px 0;
    }
    
    /* 页脚 */
    .footer {
      background: #02040a;
      padding: 50px 0 25px;
      border-top: 1px solid rgba(255,255,255,0.05);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    .footer-bottom {
      text-align: center;
      margin-top: 40px;
      color: var(--text-light-gray);
      font-size: 0.9rem;
    }
    
    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-menu-toggle { display: block; }
      .hero-content { flex-direction: column; }
      .hero-text h1 { font-size: 2.5rem; }
      .features-grid { grid-template-columns: 1fr; }
      .solution-row { flex-direction: column; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }