/* roulang page: index */
:root {
      --primary: #7C3AED;
      --primary-glow: rgba(124, 58, 237, 0.5);
      --secondary-amber: #F59E0B;
      --secondary-cyan: #06B6D4;
      --bg-deep: #0F0F1A;
      --bg-darker: #0A0A14;
      --card-bg: rgba(255, 255, 255, 0.03);
      --card-border: rgba(124, 58, 237, 0.18);
      --text-main: #F1F0F5;
      --text-muted: #A09BB5;
      --gradient-main: linear-gradient(135deg, #7C3AED 0%, #F59E0B 100%);
      --gradient-text: linear-gradient(135deg, #C084FC, #FBBF24);
      --font-sans: 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
      --font-numbers: 'Inter', sans-serif;
      --radius-card: 20px;
      --radius-btn: 50px;
      --transition-smooth: 0.25s cubic-bezier(0.2, 0.0, 0.1, 1);
      --shadow-card: 0 8px 20px rgba(0, 0, 0, 0.4);
      --shadow-hover: 0 16px 36px rgba(124, 58, 237, 0.3);
      --glass-blur: blur(14px);
      --max-width: 1200px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    ::selection {
      background: rgba(124, 58, 237, 0.7);
      color: white;
    }

    a {
      text-decoration: none;
      color: var(--text-muted);
      transition: color 0.2s;
    }
    a:hover {
      color: var(--secondary-amber);
    }

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

    /* 导航 */
    .navbar {
      background: rgba(15, 15, 26, 0.8);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(124, 58, 237, 0.18);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 0.75rem 0;
      transition: background 0.3s;
    }
    .navbar.scrolled {
      background: rgba(10, 10, 20, 0.92);
      box-shadow: 0 4px 20px rgba(0,0,0,0.6);
    }
    .logo-text {
      font-size: 1.7rem;
      font-weight: 700;
      background: var(--gradient-text);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-icon {
      font-size: 1.8rem;
      color: var(--secondary-amber);
      text-shadow: 0 0 12px rgba(245, 158, 11, 0.5);
      -webkit-text-fill-color: initial;
      background: none;
    }
    .nav-link-custom {
      color: var(--text-muted) !important;
      font-weight: 500;
      margin: 0 0.8rem;
      position: relative;
      padding: 0.2rem 0 !important;
      letter-spacing: 0.3px;
    }
    .nav-link-custom::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 50%;
      transform: translateX(-50%);
      width: 0%;
      height: 2px;
      background: var(--gradient-main);
      transition: width 0.3s ease;
      border-radius: 2px;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: white !important;
    }
    .nav-link-custom:hover::after,
    .nav-link-custom.active::after {
      width: 60%;
    }
    .navbar-toggler {
      border: none;
      padding: 0;
      box-shadow: none;
      font-size: 1.6rem;
      color: var(--secondary-amber);
    }
    .navbar-toggler-icon {
      background-image: none;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--secondary-amber);
      font-size: 2rem;
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      padding: 6rem 0 4rem;
      background: radial-gradient(circle at 80% 30%, rgba(124,58,237,0.25) 0%, rgba(15,15,26,0) 55%),
                  radial-gradient(circle at 20% 70%, rgba(6,182,212,0.12) 0%, transparent 50%);
    }
    .hero-glow {
      position: absolute;
      top: 10%;
      right: 5%;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(124,58,237,0.25) 0%, transparent 70%);
      filter: blur(100px);
      pointer-events: none;
    }
    .hero-title {
      font-size: 3.5rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      letter-spacing: -0.3px;
    }
    .gradient-highlight {
      background: var(--gradient-text);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 520px;
      margin-bottom: 2.5rem;
    }
    .btn-primary-glow {
      background: var(--gradient-main);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.8rem 2.2rem;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      letter-spacing: 0.3px;
      box-shadow: 0 4px 18px rgba(124, 58, 237, 0.6);
      transition: all 0.25s;
      display: inline-block;
      text-align: center;
    }
    .btn-primary-glow:hover {
      background: linear-gradient(135deg, #8b5cf6, #fbbf24);
      box-shadow: 0 8px 28px rgba(124, 58, 237, 0.8);
      transform: translateY(-2px);
      color: white;
    }
    .btn-outline-light-custom {
      border: 1px solid rgba(124,58,237,0.7);
      background: transparent;
      color: white;
      font-weight: 500;
      padding: 0.75rem 2rem;
      border-radius: var(--radius-btn);
      transition: 0.2s;
      backdrop-filter: blur(5px);
    }
    .btn-outline-light-custom:hover {
      background: rgba(124,58,237,0.12);
      border-color: var(--secondary-amber);
      color: white;
    }
    .hero-visual {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      min-height: 320px;
      border-radius: 32px;
      box-shadow: 0 0 60px rgba(124,58,237,0.3);
      backdrop-filter: blur(2px);
    }

    /* Section通用 */
    .section-padding {
      padding: 90px 0;
    }
    .section-title {
      font-size: 2.5rem;
      font-weight: 600;
      margin-bottom: 1rem;
      text-align: center;
      position: relative;
    }
    .title-decor {
      width: 60px;
      height: 4px;
      background: var(--secondary-amber);
      margin: 0.8rem auto 2.5rem;
      border-radius: 2px;
    }
    .card-glass {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 2rem 1.8rem;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 14px rgba(0,0,0,0.3);
      height: 100%;
    }
    .card-glass:hover {
      border-color: rgba(245, 158, 11, 0.4);
      box-shadow: var(--shadow-hover);
      transform: translateY(-5px);
    }
    .icon-glow {
      font-size: 2.4rem;
      color: var(--secondary-cyan);
      margin-bottom: 1.2rem;
      display: inline-block;
      filter: drop-shadow(0 0 6px rgba(6,182,212,0.4));
    }

    /* 功能分组 */
    .feature-row {
      align-items: center;
    }
    .feature-img {
      background-size: cover;
      background-position: center;
      border-radius: 24px;
      min-height: 280px;
      box-shadow: 0 0 30px rgba(124,58,237,0.2);
      border: 1px solid rgba(255,255,255,0.1);
    }

    /* 场景卡片 */
    .scene-card img {
      border-radius: 20px 20px 0 0;
    }

    /* 案例数据 */
    .stat-number {
      font-size: 2.6rem;
      font-weight: 700;
      color: var(--secondary-amber);
      font-family: var(--font-numbers);
    }

    /* 价格 */
    .price-card {
      background: rgba(20,20,35,0.7);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(124,58,237,0.2);
      border-radius: 28px;
      padding: 2.2rem 2rem;
      transition: all 0.3s;
    }
    .price-card.popular {
      border: 2px solid var(--secondary-amber);
      box-shadow: 0 0 32px rgba(245,158,11,0.25);
      transform: scale(1.02);
    }
    .badge-popular {
      background: var(--secondary-amber);
      color: #0a0a14;
      font-weight: 700;
      border-radius: 30px;
      padding: 0.3rem 1.2rem;
    }
    .price-amount {
      font-size: 3rem;
      font-weight: 700;
    }

    /* FAQ手风琴 */
    .accordion-button {
      background: rgba(255,255,255,0.04);
      color: var(--text-main);
      font-weight: 500;
      border: none;
      box-shadow: none;
    }
    .accordion-button:not(.collapsed) {
      background: rgba(124,58,237,0.12);
      color: white;
      border-left: 3px solid var(--secondary-amber);
    }
    .accordion-item {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.08);
      margin-bottom: 12px;
      border-radius: 16px;
      overflow: hidden;
    }

    .cta-final {
      background: linear-gradient(135deg, #7C3AED 0%, #F59E0B 100%);
      border-radius: 32px;
      padding: 5rem 2rem;
      text-align: center;
    }

    footer {
      background: var(--bg-darker);
      border-top: 1px solid rgba(124,58,237,0.25);
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 2.3rem; }
      .section-padding { padding: 60px 0; }
      .navbar-collapse { background: rgba(15,15,26,0.95); padding: 1rem; border-radius: 16px; }
    }