/* roulang page: index */
:root {
      --deep-ink: #0B0F1A;
      --dark-surface: #141826;
      --copper-gold: #C8A45C;
      --pale-gold: #E0C88E;
      --soft-gold: rgba(200, 164, 92, 0.18);
      --text-primary: #F0EDE6;
      --text-secondary: #B7B3A8;
      --text-muted: #8A867C;
      --border-gold: rgba(200, 164, 92, 0.25);
      --glass-bg: rgba(20, 24, 38, 0.7);
      --glass-border: rgba(200, 164, 92, 0.15);
      --card-shadow: 0 12px 32px rgba(0, 0, 0, 0.55);
      --gold-glow: 0 0 20px rgba(200, 164, 92, 0.55);
      --section-gap: 100px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', 'Noto Sans SC', '思源黑体', sans-serif;
      background-color: var(--deep-ink);
      color: var(--text-primary);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 25% 30%, rgba(200, 164, 92, 0.04) 0%, transparent 35%);
    }

    h1, h2, h3, .serif-title {
      font-family: 'Noto Serif SC', '思源宋体', serif;
      font-weight: 500;
      letter-spacing: 0.02em;
    }

    .container {
      max-width: 1200px;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航分屏布局 */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1050;
      background: rgba(11, 15, 26, 0.8);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(200, 164, 92, 0.15);
      transition: background 0.3s ease, box-shadow 0.3s ease;
      height: 72px;
      display: flex;
      align-items: center;
    }

    .nav-split {
      display: flex;
      width: 100%;
      align-items: center;
      justify-content: space-between;
      padding: 0 40px;
    }

    .nav-left {
      display: flex;
      align-items: center;
      gap: 42px;
      flex: 1;
    }

    .brand-logo {
      font-family: 'Noto Serif SC', serif;
      font-size: 1.8rem;
      font-weight: 600;
      color: var(--pale-gold);
      letter-spacing: 2px;
      text-decoration: none;
      white-space: nowrap;
      transition: color 0.2s;
    }
    .brand-logo:hover {
      color: var(--copper-gold);
      text-shadow: 0 0 8px rgba(200,164,92,0.5);
    }

    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      transition: color 0.2s, text-shadow 0.2s;
      padding: 6px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--copper-gold);
      border-bottom-color: var(--copper-gold);
    }

    .nav-right {
      flex: 1;
      display: flex;
      justify-content: flex-end;
      align-items: center;
    }

    /* 汉堡菜单按钮 */
    .navbar-toggler-icon {
      background-image: none;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--pale-gold);
      font-size: 1.6rem;
    }
    .navbar-toggler {
      border: 1px solid var(--border-gold);
      padding: 6px 10px;
      border-radius: 8px;
    }

    /* Hero 分屏 */
    .hero-section {
      display: flex;
      min-height: 100vh;
      align-items: center;
      padding-top: 72px;
      background-color: var(--deep-ink);
    }
    .hero-left {
      flex: 1 1 50%;
      padding: 60px 40px 60px 60px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .hero-right {
      flex: 1 1 50%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 450px;
      position: relative;
      box-shadow: inset 0 0 80px rgba(11,15,26,0.7);
    }
    .hero-right::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to right, rgba(11,15,26,0.7) 0%, rgba(11,15,26,0.3) 40%);
    }

    .hero-title {
      font-size: clamp(2.8rem, 5vw, 4.5rem);
      font-weight: 600;
      color: var(--pale-gold);
      line-height: 1.2;
      margin-bottom: 1.5rem;
      text-shadow: 0 4px 14px rgba(0,0,0,0.7);
    }
    .hero-sub {
      font-size: 1.25rem;
      color: var(--text-secondary);
      margin-bottom: 2.5rem;
      max-width: 480px;
    }

    .btn-gold {
      background: var(--copper-gold);
      border: none;
      color: #0B0F1A;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: 40px;
      letter-spacing: 0.08em;
      font-size: 1rem;
      transition: all 0.3s ease;
      box-shadow: 0 4px 14px rgba(200,164,92,0.35);
      text-transform: uppercase;
    }
    .btn-gold:hover {
      background: #D9B86B;
      box-shadow: 0 0 22px rgba(200,164,92,0.7);
      transform: translateY(-2px);
      color: #0B0F1A;
    }
    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--copper-gold);
      color: var(--copper-gold);
      padding: 12px 32px;
      border-radius: 40px;
      font-weight: 500;
      transition: 0.3s;
    }
    .btn-outline-gold:hover {
      background: var(--copper-gold);
      color: #0B0F1A;
      box-shadow: 0 0 18px rgba(200,164,92,0.5);
    }

    /* 板块标题 */
    .section-title {
      font-size: 2.5rem;
      font-weight: 500;
      color: var(--pale-gold);
      margin-bottom: 1rem;
      text-align: center;
    }
    .section-sub {
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 3.5rem;
    }

    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--glass-border);
      border-radius: 20px;
      padding: 2rem;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      border-color: rgba(200,164,92,0.45);
      transform: translateY(-6px);
      box-shadow: 0 18px 40px rgba(0,0,0,0.7);
    }

    .icon-gold {
      color: var(--copper-gold);
      font-size: 2.2rem;
      margin-bottom: 1.2rem;
    }

    .service-card img {
      height: 120px;
      object-fit: cover;
      border-radius: 14px;
      margin-bottom: 1.4rem;
    }

    .process-step {
      font-size: 3rem;
      font-weight: 600;
      color: var(--copper-gold);
      opacity: 0.9;
    }

    .testimonial-card {
      background: rgba(20,24,38,0.8);
      backdrop-filter: blur(12px);
      border-left: 3px solid var(--copper-gold);
    }

    .accordion-button {
      background: rgba(20,24,38,0.7);
      color: var(--pale-gold);
      font-weight: 500;
      border: 1px solid var(--glass-border);
      border-radius: 12px !important;
      margin-bottom: 8px;
      backdrop-filter: blur(10px);
    }
    .accordion-button:not(.collapsed) {
      background: rgba(200,164,92,0.1);
      color: var(--copper-gold);
      box-shadow: none;
    }
    .accordion-button::after {
      filter: brightness(3);
    }

    footer {
      background: #080B14;
      border-top: 1px solid rgba(200,164,92,0.2);
    }

    @media (max-width: 992px) {
      .hero-section {
        flex-direction: column;
      }
      .hero-left {
        padding: 40px 24px;
        order: 1;
        text-align: center;
        align-items: center;
      }
      .hero-right {
        min-height: 320px;
        order: 0;
        width: 100%;
      }
      .nav-left {
        gap: 20px;
      }
      .nav-links {
        gap: 16px;
      }
    }
    @media (max-width: 768px) {
      .nav-split {
        padding: 0 20px;
      }
      .nav-links {
        display: none;
      }
      .navbar-custom {
        height: 64px;
      }
      .section-title {
        font-size: 2rem;
      }
    }