/* roulang page: index */
:root {
      --primary-orange: #FF4F00;
      --primary-orange-hover: #FF6D00;
      --deep-black: #0A0E17;
      --carbon-gray: #1A1F2B;
      --neon-cyan: #00F0FF;
      --success-green: #00C853;
      --white: #FFFFFF;
      --text-primary: #E8ECF1;
      --text-secondary: #A1AAB3;
      --border-dim: rgba(255, 255, 255, 0.08);
      --glass-bg: rgba(26, 31, 43, 0.75);
      --blur-amount: 18px;
      --border-radius-lg: 20px;
      --border-radius-md: 16px;
      --border-radius-sm: 12px;
      --shadow-glow: 0 10px 30px rgba(255, 79, 0, 0.25);
      --transition-smooth: all 0.25s ease;
    }

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

    body {
      background-color: var(--deep-black);
      color: var(--text-primary);
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    h1, h2, h3, .display-font {
      font-family: 'PingFang SC', 'Noto Sans SC', 'Oswald', sans-serif;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      padding: 16px 0;
      transition: background 0.3s, backdrop-filter 0.3s, box-shadow 0.3s;
      background: transparent;
      backdrop-filter: blur(0px);
    }

    .navbar.scrolled {
      background: rgba(10, 14, 23, 0.85);
      backdrop-filter: blur(20px);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      font-family: 'Oswald', 'PingFang SC', sans-serif;
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      color: var(--primary-orange);
      font-size: 2rem;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-links a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--white);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-orange);
      transition: width 0.2s;
    }
    .nav-links a:hover::after {
      width: 100%;
    }

    .btn-nav {
      background: var(--primary-orange);
      color: white;
      padding: 10px 22px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 12px rgba(255, 79, 0, 0.4);
    }
    .btn-nav:hover {
      background: var(--primary-orange-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(255, 79, 0, 0.6);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* 英雄区 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(10,14,23,0.7) 0%, rgba(10,14,23,0.9) 90%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      width: 100%;
    }

    .hero-text h1 {
      font-size: 3.5rem;
      font-weight: 800;
      color: white;
      margin-bottom: 20px;
      line-height: 1.1;
    }
    .hero-text .highlight {
      color: var(--primary-orange);
    }
    .hero-text p {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-orange);
      color: white;
      padding: 14px 32px;
      border-radius: 50px;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: var(--transition-smooth);
      box-shadow: 0 10px 25px rgba(255, 79, 0, 0.5);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--primary-orange-hover);
      transform: translateY(-3px);
      box-shadow: 0 0 20px var(--neon-cyan), 0 15px 30px rgba(255, 79, 0, 0.6);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--neon-cyan);
      color: var(--neon-cyan);
      padding: 14px 32px;
      border-radius: 50px;
      font-weight: 700;
      transition: var(--transition-smooth);
    }
    .btn-secondary:hover {
      background: rgba(0, 240, 255, 0.1);
      transform: translateY(-3px);
    }

    .hero-mockup {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .mockup-img {
      max-width: 320px;
      filter: drop-shadow(0 20px 30px rgba(0,0,0,0.7));
      animation: float 4s ease-in-out infinite;
    }
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-15px); }
      100% { transform: translateY(0px); }
    }

    /* 通用板块 */
    section {
      padding: 100px 0;
      position: relative;
    }
    .section-title {
      font-size: 2.5rem;
      margin-bottom: 16px;
      color: white;
      text-align: center;
    }
    .section-sub {
      color: var(--text-secondary);
      text-align: center;
      max-width: 700px;
      margin: 0 auto 60px;
      font-size: 1.1rem;
    }

    /* Bento 功能网格 */
    .bento-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      grid-auto-rows: 260px;
    }
    .bento-card {
      background: var(--glass-bg);
      backdrop-filter: blur(var(--blur-amount));
      border: 1px solid var(--border-dim);
      border-radius: var(--border-radius-lg);
      padding: 24px;
      transition: var(--transition-smooth);
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      overflow: hidden;
      position: relative;
    }
    .bento-card:hover {
      border-color: var(--primary-orange);
      box-shadow: var(--shadow-glow);
      transform: translateY(-5px);
    }
    .card-large {
      grid-column: span 2;
      grid-row: span 2;
    }
    .card-wide {
      grid-column: span 2;
    }
    .card-tall {
      grid-row: span 2;
    }
    .bento-card img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: var(--border-radius-lg);
      z-index: 0;
      opacity: 0.7;
    }
    .bento-card .card-text {
      position: relative;
      z-index: 2;
      background: linear-gradient(transparent, rgba(10,14,23,0.9));
      margin: -24px;
      padding: 24px;
      padding-top: 60px;
    }
    .bento-card h3 {
      font-size: 1.5rem;
      margin-bottom: 8px;
    }
    .live-badge {
      background: var(--neon-cyan);
      color: black;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      display: inline-block;
      margin-bottom: 12px;
    }

    /* 场景轮播 */
    .scenario-slider {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding: 20px 0;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }
    .scenario-card {
      min-width: 280px;
      background: var(--carbon-gray);
      border-radius: var(--border-radius-md);
      padding: 30px;
      scroll-snap-align: start;
      border: 1px solid var(--border-dim);
    }
    .scenario-card i {
      font-size: 2rem;
      color: var(--primary-orange);
      margin-bottom: 16px;
    }

    /* 数据统计 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-item h3 {
      font-size: 2.8rem;
      color: var(--neon-cyan);
    }

    /* FAQ */
    .faq-item {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-dim);
      border-radius: var(--border-radius-sm);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 28px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      padding: 0 28px 20px;
      color: var(--text-secondary);
    }

    /* CTA */
    .cta-section {
      background: var(--carbon-gray);
      text-align: center;
      border-radius: var(--border-radius-lg);
      margin: 0 24px;
    }

    footer {
      padding: 30px 0;
      text-align: center;
      color: var(--text-secondary);
      border-top: 1px solid var(--border-dim);
    }

    @media (max-width: 1024px) {
      .hero-content { grid-template-columns: 1fr; text-align: center; }
      .hero-text p { margin: 0 auto 30px; }
      .bento-grid { grid-template-columns: repeat(2,1fr); }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .bento-grid { grid-template-columns: 1fr; }
      .hero-text h1 { font-size: 2.4rem; }
    }