/* roulang page: index */
:root {
      --primary-orange: #ff5c00;
      --primary-orange-dark: #e04d00;
      --deep-carbon: #1a1a1a;
      --data-blue: #0a1628;
      --track-white: #f2f0eb;
      --success-green: #00c853;
      --alert-red: #d50000;
      --neutral-gray: #6b7280;
      --border-light: #e5e0d8;
      --card-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
      --card-hover-shadow: 0 8px 24px rgba(255,92,0,0.12);
      --radius-card: 8px;
      --radius-btn: 6px;
      --radius-tag: 4px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      --font-mono: "Inter", "Roboto", "SF Mono", system-ui;
      --transition: all 0.2s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--track-white);
      color: var(--deep-carbon);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    /* 自定义背景纹理 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: radial-gradient(circle at 20% 30%, rgba(0,0,0,0.02) 1px, transparent 1px);
      background-size: 24px 24px;
      pointer-events: none;
      z-index: -1;
      opacity: 0.7;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      line-height: 1.3;
      color: var(--deep-carbon);
    }
    h1 {
      font-size: 36px;
      font-weight: 700;
      letter-spacing: -0.5px;
    }
    h2 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 0.75rem;
    }
    h3 {
      font-size: 18px;
      font-weight: 600;
    }
    .section-title {
      margin-bottom: 2.5rem;
      position: relative;
    }
    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 导航 */
    .navbar {
      height: 58px;
      background-color: rgba(10,22,40,0.92);
      backdrop-filter: blur(12px);
      padding: 0 1.5rem;
      z-index: 1030;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 20px;
      color: white !important;
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 0.5px;
    }
    .navbar-brand i {
      color: var(--primary-orange);
      font-size: 24px;
    }
    .nav-link {
      color: rgba(255,255,255,0.85) !important;
      font-weight: 500;
      margin: 0 0.25rem;
      padding: 0.5rem 1rem;
      border-radius: 4px;
      transition: var(--transition);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-orange) !important;
      background: rgba(255,92,0,0.1);
    }
    .nav-cta-btn {
      background: var(--primary-orange);
      color: white !important;
      border-radius: var(--radius-btn);
      padding: 0.5rem 1.25rem !important;
      font-weight: 600;
      margin-left: 0.75rem;
    }
    .nav-cta-btn:hover {
      background: var(--primary-orange-dark);
      transform: translateY(-1px);
    }
    .navbar-toggler {
      border: none;
      color: white;
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    @media (max-width: 991px) {
      .navbar-collapse {
        background: rgba(10,22,40,0.98);
        padding: 1.5rem;
        border-radius: 0 0 12px 12px;
      }
    }
    /* Hero */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #f9f7f3 0%, #f2f0eb 100%);
      padding-top: 58px;
      position: relative;
      overflow: hidden;
    }
    .hero-left {
      padding-right: 2rem;
    }
    .hero-right {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .hero-visual-card {
      background: rgba(255,255,255,0.9);
      backdrop-filter: blur(8px);
      border-radius: 16px;
      padding: 1.5rem;
      box-shadow: 0 20px 35px rgba(0,0,0,0.1);
      width: 100%;
      max-width: 380px;
      border: 1px solid rgba(255,92,0,0.2);
    }
    .score-line {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 24px;
      margin: 0.75rem 0;
    }
    .live-badge {
      background: var(--alert-red);
      color: white;
      font-size: 11px;
      padding: 2px 8px;
      border-radius: 12px;
      animation: pulse 1.5s infinite;
    }
    @keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.6; } }
    .btn-primary-custom {
      background: var(--primary-orange);
      border: none;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
    }
    .btn-primary-custom:hover {
      background: var(--primary-orange-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(255,92,0,0.3);
    }
    .btn-outline-custom {
      border: 1.5px solid var(--primary-orange);
      color: var(--primary-orange);
      background: transparent;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
    }
    .btn-outline-custom:hover {
      background: rgba(255,92,0,0.08);
    }
    /* 脉冲带 */
    .ticker-bar {
      background: var(--data-blue);
      color: white;
      height: 48px;
      display: flex;
      align-items: center;
      overflow: hidden;
      white-space: nowrap;
    }
    .ticker-content {
      display: inline-block;
      animation: scroll 25s linear infinite;
      font-family: var(--font-mono);
      font-weight: 600;
    }
    @keyframes scroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
    /* 卡片通用 */
    .card-custom {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
      border-color: rgba(255,92,0,0.25);
    }
    /* 优势网格 */
    .advantage-large {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem;
    }
    /* 产品矩阵 */
    .product-wide {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
    }
    /* 流程图 */
    .step-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-orange);
      line-height: 1;
    }
    /* 对比表 */
    .table-highlight {
      background: rgba(255,92,0,0.04);
      border: 2px solid var(--primary-orange);
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background: transparent;
      color: var(--primary-orange);
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--primary-orange);
      box-shadow: 0 0 0 0.15rem rgba(255,92,0,0.2);
    }
    /* CTA 横幅 */
    .cta-banner {
      background: var(--data-blue);
      padding: 64px 0;
    }
    /* Footer */
    .footer-links a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
    }
    .footer-links a:hover {
      color: var(--primary-orange);
    }
    @media (min-width: 768px) {
      h1 { font-size: 48px; }
      h2 { font-size: 30px; }
    }