/* roulang page: index */
:root {
      --primary: #F04E23;
      --primary-dark: #C93D1A;
      --secondary: #0F0F13;
      --accent: #F7B731;
      --surface: #FAF7F2;
      --text-main: #0F0F13;
      --text-muted: #3A3A42;
      --white: #FFFFFF;
      --border-light: rgba(15,15,19,0.08);
      --shadow-card: 0px 8px 30px rgba(15,15,19,0.08);
      --shadow-card-hover: 0px 16px 40px rgba(15,15,19,0.15);
      --shadow-btn: 0px 4px 12px rgba(240,78,35,0.3);
      --shadow-btn-hover: 0px 8px 24px rgba(240,78,35,0.5);
      --radius-card: 24px;
      --radius-btn: 50px;
      --radius-input: 12px;
      --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      --font-heading: "PingFang SC Heavy", "Microsoft YaHei Bold", "Noto Sans SC Bold", sans-serif;
      --font-body: "PingFang SC Regular", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: "DIN Alternate", "Roboto Mono", "Courier New", monospace;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 80px;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--surface);
      color: var(--text-main);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 80px;
      background: rgba(15, 15, 19, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 1000;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(255,255,255,0.05);
      transition: background 0.3s;
    }

    .header-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--accent);
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.8rem;
      letter-spacing: -0.02em;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0F0F13;
      font-size: 20px;
    }

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

    .nav-link {
      color: #EAEAEA;
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      transition: color 0.2s;
      position: relative;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s;
    }

    .nav-link:hover {
      color: var(--white);
    }

    .nav-link:hover::after {
      width: 100%;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #D93A1A);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-family: var(--font-heading);
      letter-spacing: 0.5px;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-btn);
      transition: all var(--transition);
      cursor: pointer;
    }

    .btn-primary:hover {
      box-shadow: var(--shadow-btn-hover);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--white);
      color: var(--white);
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      text-decoration: none;
      transition: 0.3s;
    }

    .btn-outline:hover {
      background: var(--white);
      color: var(--secondary);
    }

    .mobile-bottom-nav {
      display: none;
    }

    /* Hero */
    #hero {
      background: linear-gradient(135deg, #0F0F13 0%, #2A1A14 60%, #F04E23 100%);
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      overflow: hidden;
      padding-top: 80px;
    }

    .hero-bg-particles {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(247,183,49,0.08) 0%, transparent 50%);
      pointer-events: none;
    }

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

    .hero-content {
      color: white;
    }

    .hero-content h1 {
      font-family: var(--font-heading);
      font-size: 56px;
      font-weight: 900;
      line-height: 1.1;
      letter-spacing: -0.02em;
      margin-bottom: 1rem;
    }

    .hero-highlight {
      color: var(--accent);
    }

    .hero-sub {
      font-size: 1.4rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 2rem;
      font-weight: 400;
    }

    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .hero-visual {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .phone-mock {
      width: 280px;
      height: 560px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 40px;
      box-shadow: 0 30px 50px rgba(0,0,0,0.5);
      border: 2px solid var(--accent);
      position: relative;
      z-index: 3;
    }

    .floating-badge {
      position: absolute;
      background: rgba(15,15,19,0.9);
      backdrop-filter: blur(8px);
      border: 1px solid var(--accent);
      color: var(--accent);
      padding: 8px 18px;
      border-radius: 40px;
      font-weight: 700;
      font-family: var(--font-mono);
      font-size: 1.1rem;
      box-shadow: 0 8px 20px rgba(0,0,0,0.4);
      z-index: 4;
      animation: pulse-badge 2s infinite;
    }

    .badge-1 { top: 50px; right: -30px; }
    .badge-2 { bottom: 100px; left: -20px; animation-delay: 0.5s; }
    .badge-3 { top: 200px; left: -40px; animation-delay: 1s; }

    @keyframes pulse-badge {
      0% { box-shadow: 0 0 0 0 rgba(247,183,49,0.6); }
      70% { box-shadow: 0 0 0 12px rgba(247,183,49,0); }
      100% { box-shadow: 0 0 0 0 rgba(247,183,49,0); }
    }

    /* Stats */
    #stats {
      background: var(--surface);
      padding: 80px 0;
      position: relative;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }

    .stat-item {
      padding: 20px;
    }

    .stat-number {
      font-family: var(--font-mono);
      font-size: 52px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
    }

    .stat-label {
      color: var(--text-muted);
      font-size: 1rem;
      margin-top: 8px;
    }

    .stat-trend {
      color: #2E7D32;
      font-weight: 700;
      font-size: 0.9rem;
      margin-top: 6px;
    }

    /* Services */
    #services {
      background: var(--white);
      padding: 100px 0;
    }

    .section-title {
      font-family: var(--font-heading);
      font-size: 42px;
      font-weight: 800;
      margin-bottom: 60px;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -12px;
      left: 0;
      width: 70px;
      height: 5px;
      background: var(--primary);
      border-radius: 4px;
    }

    .services-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }

    .service-card {
      background: var(--surface);
      padding: 32px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
      border-top: 4px solid var(--accent);
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-card-hover);
      border-top-color: var(--primary);
    }

    .core-badge {
      position: absolute;
      top: 16px;
      right: 16px;
      background: var(--primary);
      color: white;
      font-size: 0.7rem;
      padding: 4px 10px;
      border-radius: 20px;
      font-weight: 700;
    }

    .service-icon {
      font-size: 2.2rem;
      color: var(--accent);
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-family: var(--font-heading);
      font-size: 1.6rem;
      margin-bottom: 12px;
    }

    /* Compare */
    #compare {
      background: var(--surface);
      padding: 100px 0;
    }

    .compare-grid {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 30px;
      align-items: center;
    }

    .compare-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 40px;
      box-shadow: var(--shadow-card);
    }

    .compare-left {
      border: 1px solid #ddd;
    }

    .compare-right {
      border: 2px solid var(--primary);
    }

    .vs-badge {
      background: var(--secondary);
      color: var(--accent);
      width: 70px;
      height: 70px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.6rem;
      box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    }

    /* FAQ */
    #faq {
      background: var(--white);
      padding: 100px 0;
    }

    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .faq-item {
      border-bottom: 1px solid #e0e0e0;
      padding: 16px 0;
      cursor: pointer;
    }

    .faq-question {
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* CTA */
    #cta {
      background: var(--secondary);
      padding: 100px 0;
      color: white;
      position: relative;
    }

    .cta-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 50px;
      align-items: center;
    }

    .trophy-illustration {
      background: url('/assets/images/backpic/back-2.webp') center/contain no-repeat;
      height: 300px;
    }

    .cta-form input {
      width: 100%;
      padding: 14px 20px;
      border-radius: var(--radius-input);
      border: none;
      margin-bottom: 16px;
      background: var(--surface);
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }

    .cta-form input:focus {
      outline: none;
      border-bottom-color: var(--primary);
    }

    .trust-badges {
      display: flex;
      gap: 30px;
      margin-top: 24px;
      color: #aaa;
      font-size: 0.85rem;
    }

    footer {
      background: #0A0A0D;
      color: #888;
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    @media (max-width: 1024px) {
      .hero-grid, .services-grid, .compare-grid, .cta-grid {
        grid-template-columns: 1fr;
      }
      .vs-badge {
        margin: 20px auto;
      }
    }

    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 64px;
        background: rgba(15,15,19,0.95);
        backdrop-filter: blur(12px);
        justify-content: space-around;
        align-items: center;
        z-index: 1000;
      }
      .mobile-nav-item {
        color: #888;
        text-decoration: none;
        font-size: 0.7rem;
        display: flex;
        flex-direction: column;
        align-items: center;
      }
      .mobile-nav-item.active {
        color: var(--primary);
      }
      .stats-grid, .services-grid, .faq-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      h1 { font-size: 36px !important; }
      .section-title { font-size: 28px; }
    }