/* roulang page: index */
:root {
      --deep-space: #0B0C10;
      --star-gold: #F2A900;
      --star-gold-hover: #FFB81C;
      --nebula-purple: #6B4C9B;
      --silver-grey: #C5C6C7;
      --card-bg: rgba(26, 26, 46, 0.7);
      --card-border: rgba(242, 169, 0, 0.15);
      --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      --glow-gold: 0 0 20px rgba(242, 169, 0, 0.3);
      --text-primary: #ffffff;
      --text-secondary: #C5C6C7;
      --text-muted: #9a9b9f;
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-pill: 24px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
      --section-padding: 80px 0;
      --container-max: 1140px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background: var(--deep-space);
      background-image: radial-gradient(ellipse at 30% 20%, #1f1f2e 0%, #0B0C10 70%);
      color: var(--text-primary);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: var(--star-gold);
      transition: color 0.25s ease;
    }
    a:hover {
      color: var(--star-gold-hover);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    h1, h2, h3, h4, h5, h6 {
      font-family: var(--font-heading);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 0.75rem;
    }

    h1 {
      font-size: 3rem;
      letter-spacing: -0.02em;
    }
    h2 {
      font-size: 2.25rem;
      letter-spacing: -0.01em;
    }
    h3 {
      font-size: 1.5rem;
    }

    .container-custom {
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航 */
    .navbar-custom {
      background: rgba(11, 12, 16, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(242, 169, 0, 0.15);
      padding: 12px 0;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1030;
      box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }
    .navbar-custom .logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 4px;
      color: var(--star-gold);
      display: flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
    }
    .logo i {
      font-size: 1.4rem;
      color: var(--star-gold);
    }
    .search-box {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(242,169,0,0.25);
      border-radius: var(--border-radius-pill);
      padding: 8px 18px;
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--silver-grey);
      transition: border-color 0.2s;
      width: 260px;
    }
    .search-box i {
      color: var(--star-gold);
      font-size: 1rem;
    }
    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      color: white;
      width: 100%;
    }
    .search-box input::placeholder {
      color: #9a9b9f;
      font-size: 0.9rem;
    }
    .nav-link-custom {
      color: var(--silver-grey);
      font-size: 0.9rem;
      font-weight: 500;
      margin-left: 1.5rem;
      transition: 0.2s;
      white-space: nowrap;
    }
    .nav-link-custom:hover {
      color: var(--star-gold);
    }
    .navbar-toggler {
      border-color: rgba(242,169,0,0.4);
    }
    .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(242, 169, 0, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    @media (max-width: 992px) {
      .navbar-custom .navbar-collapse {
        background: rgba(11,12,16,0.95);
        backdrop-filter: blur(15px);
        padding: 20px;
        border-radius: 12px;
        margin-top: 15px;
        border: 1px solid rgba(242,169,0,0.2);
      }
      .search-box {
        width: 100%;
        margin: 10px 0;
      }
      .nav-link-custom {
        margin: 12px 0;
        display: block;
      }
    }

    /* Hero */
    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(11,12,16,0.4);
      padding-top: 80px;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }
    .star-circle {
      width: 200px;
      height: 200px;
      border: 2px dashed rgba(242,169,0,0.25);
      border-radius: 50%;
      position: absolute;
      right: 10%;
      top: 30%;
      animation: spin 25s infinite linear;
      opacity: 0.6;
    }
    @keyframes spin { 100% { transform: rotate(360deg); } }

    .btn-gold {
      background: var(--star-gold);
      color: #0B0C10;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--border-radius-btn);
      border: none;
      transition: 0.2s;
      font-size: 1rem;
    }
    .btn-gold:hover {
      background: var(--star-gold-hover);
      box-shadow: 0 0 18px rgba(242,169,0,0.5);
      color: #0B0C10;
    }
    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--star-gold);
      color: var(--star-gold);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--border-radius-btn);
      transition: 0.2s;
    }
    .btn-outline-gold:hover {
      background: rgba(242,169,0,0.1);
      color: var(--star-gold-hover);
    }

    /* 区块通用 */
    section {
      padding: var(--section-padding);
    }
    .section-title {
      font-size: 2.5rem;
      margin-bottom: 1.5rem;
    }
    .gold-text {
      color: var(--star-gold);
    }

    /* 痛点 */
    .pain-left {
      font-size: 2rem;
      font-weight: 700;
    }
    .pain-item {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 1.8rem;
    }
    .pain-dot {
      width: 10px;
      height: 10px;
      background: #6B4C9B;
      border-radius: 50%;
      box-shadow: 0 0 12px #6B4C9B;
    }

    /* 卡片通用 */
    .card-custom {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--border-radius-card);
      box-shadow: var(--card-shadow);
      padding: 28px 24px;
      transition: transform 0.25s, box-shadow 0.3s;
      height: 100%;
      backdrop-filter: blur(8px);
    }
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--glow-gold), 0 12px 28px rgba(0,0,0,0.6);
    }
    .card-img {
      border-radius: 8px;
      margin-bottom: 20px;
    }

    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--star-gold);
      line-height: 1.2;
    }

    .testimonial-card {
      background: rgba(26,26,46,0.6);
      border-left: 4px solid var(--star-gold);
      border-radius: 12px;
      padding: 28px;
    }

    /* FAQ */
    .accordion-button {
      background: rgba(26,26,46,0.8);
      color: var(--star-gold);
      font-weight: 600;
      border: 1px solid rgba(242,169,0,0.2);
      border-radius: 8px !important;
      box-shadow: none;
    }
    .accordion-button:not(.collapsed) {
      background: rgba(242,169,0,0.08);
      color: var(--star-gold);
      box-shadow: 0 0 10px rgba(242,169,0,0.2);
    }
    .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 12px;
    }

    footer {
      background: #0B0C10;
      border-top: 1px solid rgba(242,169,0,0.15);
      color: var(--silver-grey);
    }

    @media (max-width: 768px) {
      h1 { font-size: 2rem; }
      h2 { font-size: 1.8rem; }
      .pain-left { font-size: 1.6rem; }
      .stat-number { font-size: 2.4rem; }
      .star-circle { display: none; }
    }
    @media (max-width: 576px) {
      section { padding: 60px 0; }
      .btn-gold, .btn-outline-gold { width: 100%; text-align: center; }
    }