/* roulang page: index */
:root {
      --deep-bg: #0D0B1E;
      --dark-card: #100C1A;
      --glass-bg: rgba(20, 15, 30, 0.55);
      --glass-border: rgba(212, 175, 55, 0.2);
      --gold: #D4AF37;
      --gold-light: #F5E6CC;
      --amber: #B8860B;
      --violet: #A855F7;
      --violet-glow: rgba(168, 85, 247, 0.5);
      --text-light: #E0E0E0;
      --text-muted: #A0A0B0;
      --border-radius-card: 16px;
      --border-radius-btn: 50px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.5);
      --shadow-hover: 0 12px 40px rgba(0,0,0,0.7), 0 0 20px rgba(212,175,55,0.3);
      --transition-base: all 0.3s ease;
      --font-serif: 'Noto Serif TC', 'Times New Roman', serif;
      --font-sans: 'Noto Sans TC', 'Helvetica Neue', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--deep-bg);
      color: var(--text-light);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      background-image: radial-gradient(circle at 30% 40%, rgba(168,85,247,0.08) 0%, transparent 40%);
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, .serif-title {
      font-family: var(--font-serif);
      font-weight: 700;
      letter-spacing: 0.02em;
    }

    a {
      text-decoration: none;
      transition: var(--transition-base);
      color: var(--gold);
    }
    a:hover {
      color: var(--gold-light);
    }

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

    /* 自定义容器微调 */
    .custom-container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 导航卡片面板 */
    .navbar-custom {
      position: sticky;
      top: 0;
      z-index: 1050;
      background: rgba(10, 8, 20, 0.8);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(212, 175, 55, 0.25);
      padding: 0.75rem 0;
    }
    .nav-card-panel {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .nav-logo {
      font-family: var(--font-serif);
      font-size: 1.7rem;
      font-weight: 700;
      color: var(--gold);
      letter-spacing: 0.05em;
      display: flex;
      align-items: center;
    }
    .nav-logo i {
      margin-right: 0.5rem;
      color: var(--gold);
      font-size: 2rem;
    }
    .nav-items {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      flex-wrap: wrap;
    }
    .nav-item-card {
      background: rgba(255,255,255,0.05);
      border-radius: 8px;
      padding: 0.45rem 1.1rem;
      color: var(--text-light);
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-base);
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .nav-item-card:hover {
      background: rgba(212,175,55,0.1);
      border-color: rgba(212,175,55,0.3);
      color: var(--gold);
      box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    }
    .nav-cta {
      background: linear-gradient(135deg, var(--violet), var(--amber));
      color: white;
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      padding: 0.6rem 1.8rem;
      box-shadow: 0 0 18px var(--violet-glow);
      border: none;
      transition: var(--transition-base);
      margin-left: 0.8rem;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: linear-gradient(135deg, #b86ef0, #c99c1a);
      box-shadow: 0 0 30px rgba(168,85,247,0.8);
      transform: scale(1.03);
      color: white;
    }

    /* Hero 全屏 */
    .hero-section {
      min-height: 100vh;
      background: linear-gradient(180deg, rgba(13,11,30,0.7) 0%, rgba(16,12,26,0.9) 90%), 
                  url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      border-bottom: 1px solid rgba(212,175,55,0.2);
    }
    .hero-content h1 {
      font-size: clamp(2.5rem, 8vw, 4.2rem);
      background: linear-gradient(180deg, #D4AF37 0%, #F5E6CC 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 1.2rem;
      text-shadow: 0 0 25px rgba(212,175,55,0.3);
      letter-spacing: 0.07em;
    }
    .hero-content .subtitle {
      font-size: 1.3rem;
      color: var(--text-light);
      margin-bottom: 2.5rem;
      font-weight: 300;
    }
    .btn-primary-glow {
      background: linear-gradient(135deg, #A855F7, #B8860B);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.85rem 2.5rem;
      border-radius: 50px;
      box-shadow: 0 0 20px var(--violet-glow);
      transition: var(--transition-base);
      font-size: 1.1rem;
    }
    .btn-primary-glow:hover {
      box-shadow: 0 0 35px rgba(168,85,247,0.9);
      transform: scale(1.04);
      color: white;
    }
    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--gold);
      color: var(--gold);
      font-weight: 500;
      padding: 0.85rem 2.5rem;
      border-radius: 50px;
      transition: var(--transition-base);
      font-size: 1.1rem;
    }
    .btn-outline-gold:hover {
      background: rgba(212,175,55,0.15);
      color: var(--gold-light);
      border-color: var(--gold-light);
    }

    /* 通用区块标题 */
    .section-title {
      font-size: 2.3rem;
      color: var(--gold);
      margin-bottom: 2.8rem;
      font-weight: 650;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -10px;
      width: 60px;
      height: 3px;
      background: var(--gold);
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--glass-border);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
    }
    .glass-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: rgba(212,175,55,0.4);
    }

    /* 优势卡片数字 */
    .adv-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--gold);
      font-family: var(--font-serif);
    }

    /* 服务图文交替 */
    .service-img {
      border-radius: 16px;
      object-fit: cover;
      width: 100%;
      height: 260px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.6);
    }

    /* 案例横向滚动 */
    .case-scroll {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding-bottom: 1rem;
      scrollbar-width: thin;
      scrollbar-color: var(--gold) var(--dark-card);
    }
    .case-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .case-scroll::-webkit-scrollbar-thumb {
      background: var(--gold);
      border-radius: 10px;
    }
    .case-card {
      min-width: 280px;
      max-width: 320px;
      flex: 0 0 auto;
    }

    /* FAQ */
    .accordion-faq .accordion-item {
      background: transparent;
      border: none;
      border-bottom: 1px solid rgba(212,175,55,0.25);
    }
    .accordion-faq .accordion-button {
      background: rgba(20,15,30,0.5);
      color: var(--text-light);
      font-weight: 500;
      box-shadow: none;
      border-radius: 12px !important;
      padding: 1.2rem 1.5rem;
    }
    .accordion-faq .accordion-button:not(.collapsed) {
      background: rgba(212,175,55,0.08);
      color: var(--gold);
    }
    .accordion-faq .accordion-body {
      background: rgba(0,0,0,0.2);
      color: var(--text-muted);
    }

    /* 表单 */
    .form-control-dark {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(212,175,55,0.35);
      border-radius: 12px;
      color: white;
      padding: 0.8rem 1.2rem;
    }
    .form-control-dark:focus {
      border-color: var(--violet);
      box-shadow: 0 0 15px var(--violet-glow);
      background: rgba(30,20,40,0.8);
      color: white;
    }

    footer {
      background: #0A0814;
      border-top: 1px solid var(--gold);
      color: var(--text-muted);
    }

    @media (max-width: 768px) {
      .nav-items {
        gap: 0.3rem;
      }
      .nav-item-card {
        padding: 0.35rem 0.8rem;
        font-size: 0.8rem;
      }
      .service-img {
        height: 220px;
        margin-bottom: 1rem;
      }
    }