/* roulang page: index */
:root {
      --deep-night: #0A0E17;
      --card-bg: #131A26;
      --gold: #C8A951;
      --neon-purple: #A855F7;
      --text-light: #E0E0E0;
      --text-muted: #9CA3AF;
      --border-dim: rgba(255, 255, 255, 0.06);
      --border-card: rgba(168, 85, 247, 0.15);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow: 0 0 24px rgba(168, 85, 247, 0.25);
      --radius-card: 20px;
      --radius-btn: 50px;
      --transition-smooth: all 0.3s ease;
      --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-display: 'Outfit', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      background-color: var(--deep-night);
      color: var(--text-light);
      font-family: var(--font-body);
      font-weight: 400;
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, .display-font {
      font-family: var(--font-display);
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    /* 导航 */
    .navbar {
      background: rgba(10, 14, 23, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding: 0.75rem 0;
    }
    .navbar-brand {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1.6rem;
      color: #ffffff;
      position: relative;
      padding-left: 20px;
    }
    .navbar-brand::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%) rotate(45deg);
      width: 8px;
      height: 8px;
      background: var(--neon-purple);
      box-shadow: 0 0 12px var(--neon-purple);
    }
    .navbar-nav .nav-link {
      color: #CCCCCC !important;
      font-weight: 500;
      margin: 0 0.5rem;
      padding: 0.5rem 0.75rem;
      position: relative;
      font-size: 0.95rem;
      letter-spacing: 0.3px;
    }
    .navbar-nav .nav-link.active {
      color: var(--gold) !important;
    }
    .navbar-nav .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0.75rem;
      right: 0.75rem;
      height: 2px;
      background: var(--gold);
    }
    .navbar-nav .nav-link:hover {
      color: #FFFFFF !important;
    }
    .btn-arena {
      background: linear-gradient(135deg, var(--gold), var(--neon-purple));
      border: none;
      color: var(--deep-night);
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 0.6rem 2rem;
      letter-spacing: 0.5px;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    }
    .btn-arena:hover {
      transform: scale(1.05);
      box-shadow: 0 0 20px rgba(168, 85, 247, 0.5);
      color: var(--deep-night);
      background: linear-gradient(135deg, #dbb442, #b76eff);
    }
    /* Hero */
    .hero-section {
      min-height: 100vh;
      background: radial-gradient(circle at 30% 40%, #1A1030 0%, #0A0E17 75%);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      padding: 6rem 0 3rem;
    }
    .hero-glow {
      position: absolute;
      width: 400px;
      height: 400px;
      background: rgba(168, 85, 247, 0.12);
      filter: blur(80px);
      border-radius: 50%;
      top: 20%;
      right: 10%;
    }
    .hero-title {
      font-size: 3.8rem;
      font-weight: 700;
      line-height: 1.2;
    }
    .gold-highlight {
      color: var(--gold);
      background: linear-gradient(135deg, #e6c468, #c8a951);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-sub {
      color: #b0b8c1;
      font-size: 1.1rem;
      max-width: 560px;
      margin: 1.5rem 0 2rem;
    }
    .abstract-geo {
      width: 280px;
      height: 280px;
      position: relative;
      margin: 0 auto;
    }
    .gold-ring {
      width: 180px;
      height: 180px;
      border: 2px solid rgba(200, 169, 81, 0.4);
      border-radius: 50%;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      animation: rotateRing 18s infinite linear;
    }
    .neon-cube {
      width: 36px;
      height: 36px;
      background: rgba(168, 85, 247, 0.9);
      position: absolute;
      top: 60px;
      right: 50px;
      transform: rotate(15deg);
      box-shadow: 0 0 30px var(--neon-purple);
      animation: floatCube 6s infinite ease-in-out;
    }
    @keyframes rotateRing { 0% { transform: translate(-50%, -50%) rotate(0deg); } 100% { transform: translate(-50%, -50%) rotate(360deg); } }
    @keyframes floatCube { 0% { transform: translateY(0px) rotate(15deg); } 50% { transform: translateY(-20px) rotate(20deg); } 100% { transform: translateY(0px) rotate(15deg); } }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: rgba(255,255,255,0.5);
      font-size: 0.85rem;
    }
    /* 通用板块 */
    .section-padding {
      padding: 100px 0;
    }
    .section-title {
      font-size: 2.6rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: #fff;
    }
    .divider {
      height: 1px;
      background: rgba(255,255,255,0.05);
      margin: 0;
    }
    .card-custom {
      background: var(--card-bg);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      height: 100%;
    }
    .card-custom:hover {
      border-color: var(--neon-purple);
      box-shadow: var(--shadow-glow);
    }
    .service-icon {
      font-size: 2.4rem;
      color: var(--neon-purple);
      margin-bottom: 1.5rem;
    }
    .card-title {
      font-size: 1.5rem;
      font-weight: 600;
      color: var(--gold);
    }
    .text-link {
      color: var(--gold);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      border-bottom: 1px solid transparent;
      transition: 0.2s;
    }
    .text-link:hover {
      color: #fff;
      border-bottom-color: var(--gold);
    }
    .badge-purple {
      background: rgba(168, 85, 247, 0.15);
      color: var(--neon-purple);
      border-radius: 20px;
      padding: 0.2rem 0.9rem;
      font-size: 0.75rem;
      font-weight: 600;
    }
    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--gold);
      color: var(--gold);
      border-radius: var(--radius-btn);
      padding: 0.7rem 2.2rem;
      font-weight: 600;
    }
    .btn-outline-gold:hover {
      background: rgba(168, 85, 247, 0.1);
      border-color: var(--neon-purple);
      color: #fff;
    }
    .stat-ring {
      width: 130px;
      height: 130px;
      border: 2px solid rgba(200, 169, 81, 0.3);
      border-radius: 50%;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1rem;
    }
    .stat-number {
      font-size: 2.4rem;
      font-weight: 800;
      background: linear-gradient(135deg, #C8A951, #A855F7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }
    .process-step {
      text-align: center;
    }
    .step-circle {
      width: 50px;
      height: 50px;
      background: linear-gradient(135deg, var(--gold), var(--neon-purple));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #0A0E17;
      font-size: 1.3rem;
      margin: 0 auto 1rem;
    }
    .dashed-line {
      border-top: 2px dashed rgba(200, 169, 81, 0.25);
      width: 100%;
      position: relative;
      top: 25px;
      z-index: -1;
    }
    .accordion-button {
      background: var(--card-bg);
      color: var(--gold);
      font-weight: 600;
      font-size: 1.1rem;
      box-shadow: none;
      border: none;
      padding: 1.25rem 1.5rem;
    }
    .accordion-item {
      background: transparent;
      border: none;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .accordion-button:not(.collapsed) {
      background: #1a1f2b;
      color: var(--gold);
      box-shadow: none;
      border-left: 3px solid var(--neon-purple);
    }
    .accordion-body {
      color: #ccc;
      padding: 1rem 1.5rem 1.5rem;
    }
    .cta-full {
      background: linear-gradient(135deg, #C8A951, #A855F7);
      border-radius: 32px;
      padding: 3.5rem 2rem;
      color: #0A0E17;
    }
    .footer-link {
      color: #888;
      font-size: 0.9rem;
      margin-bottom: 0.4rem;
      display: block;
    }
    .footer-link:hover {
      color: var(--gold);
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 2.5rem; }
      .section-title { font-size: 2rem; }
      .navbar-collapse { background: #131A26; padding: 1rem; border-radius: 16px; }
    }
    @media (max-width: 520px) {
      .hero-title { font-size: 2rem; }
    }