/* roulang page: index */
:root {
      --deep-blue: #0A1F3F;
      --electric-cyan: #00E5FF;
      --ice-bg: #F5F9FC;
      --coral: #FF5C39;
      --text-primary: #1E2A38;
      --text-secondary: #5F6B7A;
      --border-light: #D0D7DE;
      --card-bg: rgba(255, 255, 255, 0.7);
      --card-border: rgba(255, 255, 255, 0.4);
      --card-shadow: 0 8px 32px rgba(10, 31, 63, 0.08);
      --radius-card: 16px;
      --radius-btn: 30px;
      --radius-input: 10px;
      --radius-lg: 24px;
      --font-inter: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      --font-system: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      --glass-blur: blur(12px);
      --transition-smooth: all 0.25s ease;
    }

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

    body {
      font-family: var(--font-system);
      font-size: 16px;
      font-weight: 400;
      line-height: 1.7;
      color: var(--text-primary);
      background-color: var(--ice-bg);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .nav-link, .btn, .stats-number, .step-number {
      font-family: var(--font-inter);
    }

    .container-custom {
      width: 100%;
      padding-right: 1.5rem;
      padding-left: 1.5rem;
      margin-right: auto;
      margin-left: auto;
    }
    @media (min-width: 576px) { .container-custom { max-width: 540px; } }
    @media (min-width: 768px) { .container-custom { max-width: 720px; } }
    @media (min-width: 992px) { .container-custom { max-width: 960px; } }
    @media (min-width: 1200px) { .container-custom { max-width: 1140px; } }
    @media (min-width: 1400px) { .container-custom { max-width: 1280px; } }

    /* 顶部信息条 */
    .top-infobar {
      background-color: var(--deep-blue);
      color: #B0C4DE;
      font-size: 13px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 1.5rem;
      letter-spacing: 0.3px;
    }
    .top-infobar a {
      color: var(--electric-cyan);
      text-decoration: none;
      font-weight: 500;
      transition: opacity 0.2s;
    }
    .top-infobar a:hover {
      opacity: 0.8;
      color: var(--electric-cyan);
    }

    /* 主导航 */
    .main-navbar {
      background: rgba(10, 31, 63, 0.85);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      position: sticky;
      top: 0;
      z-index: 1030;
      border-bottom: 1px solid rgba(255,255,255,0.15);
    }
    .navbar-brand-custom {
      font-family: var(--font-inter);
      font-weight: 700;
      font-size: 1.6rem;
      color: white;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .brand-icon {
      font-size: 2rem;
      color: var(--electric-cyan);
    }
    .nav-link-anchor {
      color: rgba(255,255,255,0.85) !important;
      font-weight: 500;
      margin: 0 0.25rem;
      padding: 0.5rem 0.75rem !important;
      position: relative;
      transition: color 0.2s;
    }
    .nav-link-anchor:hover, .nav-link-anchor.active {
      color: white !important;
    }
    .nav-link-anchor::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0.75rem;
      right: 0.75rem;
      height: 2px;
      background: var(--electric-cyan);
      transform: scaleX(0);
      transition: transform 0.2s ease;
    }
    .nav-link-anchor:hover::after, .nav-link-anchor.active::after {
      transform: scaleX(1);
    }
    .btn-cta-nav {
      background: var(--coral);
      border: none;
      color: white;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 0.5rem 1.5rem;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 12px rgba(255,92,57,0.3);
    }
    .btn-cta-nav:hover {
      background: #ff6b4a;
      transform: scale(1.05);
      box-shadow: 0 0 18px rgba(255,92,57,0.6);
      color: white;
    }
    @media (max-width: 991px) {
      .navbar-collapse {
        background: rgba(10,31,63,0.95);
        backdrop-filter: blur(16px);
        padding: 1rem;
        border-radius: 16px;
        margin-top: 0.5rem;
      }
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      background: radial-gradient(circle at 30% 40%, #0A1F3F 0%, #0a2f2a 100%);
      position: relative;
      display: flex;
      align-items: center;
      overflow: hidden;
    }
    .hero-bg-image {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.2;
      mix-blend-mode: overlay;
    }
    .wave-svg {
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      z-index: 2;
    }
    .hero-content {
      position: relative;
      z-index: 5;
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      color: white;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      max-width: 600px;
      margin: 1.5rem 0 2rem;
    }
    .btn-hero-primary {
      background: var(--coral);
      border: none;
      color: white;
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 0.8rem 2.2rem;
      transition: var(--transition-smooth);
      box-shadow: 0 6px 18px rgba(255,92,57,0.45);
    }
    .btn-hero-primary:hover {
      background: #ff7557;
      transform: scale(1.05);
      box-shadow: 0 0 22px rgba(255,92,57,0.7);
    }
    .btn-hero-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 0.8rem 2.2rem;
      margin-left: 1rem;
      transition: var(--transition-smooth);
    }
    .btn-hero-outline:hover {
      background: rgba(255,255,255,0.15);
      border-color: white;
      color: white;
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 2.2rem; }
      .btn-hero-outline { margin-left: 0; margin-top: 0.8rem; display: inline-block; }
    }

    /* 玻璃拟态卡片通用 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: transform 0.25s ease, box-shadow 0.3s;
    }
    .glass-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(10,31,63,0.12);
      border-color: rgba(255,255,255,0.7);
    }

    .service-icon {
      font-size: 2.8rem;
      color: var(--electric-cyan);
    }
    .stats-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--coral);
      line-height: 1.1;
    }
    .partner-logo img {
      filter: grayscale(1);
      opacity: 0.7;
      transition: 0.2s;
      max-height: 50px;
    }
    .partner-logo:hover img {
      filter: grayscale(0);
      opacity: 1;
    }
    .step-circle {
      width: 48px;
      height: 48px;
      background: var(--electric-cyan);
      color: var(--deep-blue);
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
    }
    .accordion-button:not(.collapsed) {
      background: transparent;
      color: var(--electric-cyan);
      font-weight: 600;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: transparent;
    }
    .footer-link {
      color: #B0C4DE;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-link:hover { color: var(--electric-cyan); }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      color: var(--deep-blue);
    }
    @media (max-width: 576px) {
      .section-title { font-size: 1.8rem; }
    }