/* roulang page: index */
:root {
      --primary-deep: #3E2C23;
      --accent-gold: #C9A96E;
      --accent-gold-dark: #A6844A;
      --accent-amber: #B8863D;
      --bg-warm: #FBF7F2;
      --bg-card: #FFFFFF;
      --bg-soft: #FDF9F4;
      --bg-dark: #2B1D16;
      --text-main: #2C241E;
      --text-secondary: #6B5E53;
      --text-light: #EADDCB;
      --border-gold: rgba(201,169,110,0.25);
      --border-card: rgba(201,169,110,0.12);
      --shadow-sm: 0 4px 20px rgba(62,44,35,0.06);
      --shadow-hover: 0 12px 32px rgba(62,44,35,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'Georgia', 'Times New Roman', serif;
      --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-number: 'Inter', 'Montserrat', sans-serif;
      --transition-base: all 0.3s ease-out;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .font-serif {
      font-family: var(--font-serif);
      font-weight: 600;
    }

    h1 {
      font-size: 44px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.3;
    }

    h2 {
      font-size: 32px;
      font-weight: 600;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
    }

    .text-gold {
      color: var(--accent-gold);
    }

    .bg-dark-custom {
      background-color: var(--bg-dark);
    }

    .bg-warm-light {
      background-color: var(--bg-soft);
    }

    /* 按钮系统 */
    .btn-primary-gold {
      background: linear-gradient(135deg, #C9A96E 0%, #B8965C 100%);
      border: none;
      color: white;
      font-weight: 500;
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      transition: var(--transition-base);
      box-shadow: 0 4px 10px rgba(201,169,110,0.3);
      letter-spacing: 1px;
      font-size: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-primary-gold:hover {
      background: linear-gradient(135deg, #B8965C 0%, #A6844A 100%);
      color: white;
      box-shadow: 0 8px 20px rgba(184,134,61,0.45);
      transform: translateY(-2px);
    }

    .btn-outline-gold {
      background: transparent;
      border: 1.5px solid var(--accent-gold);
      color: var(--accent-gold);
      border-radius: var(--radius-btn);
      padding: 10px 30px;
      font-weight: 500;
      transition: var(--transition-base);
    }

    .btn-outline-gold:hover {
      background: rgba(201,169,110,0.08);
      border-color: var(--accent-gold-dark);
      color: var(--accent-gold-dark);
    }

    /* 导航 */
    .navbar {
      background-color: var(--bg-warm);
      border-bottom: 1px solid var(--border-gold);
      padding: 0.8rem 0;
      transition: var(--transition-base);
    }

    .navbar.scrolled {
      box-shadow: 0 4px 20px rgba(62,44,35,0.08);
    }

    .navbar-brand {
      font-family: var(--font-serif);
      font-size: 24px;
      font-weight: 600;
      color: var(--primary-deep) !important;
      letter-spacing: 1px;
    }

    .navbar-brand i {
      color: var(--accent-gold);
      font-size: 20px;
      margin-right: 6px;
    }

    .nav-link {
      color: #5C4A3E !important;
      font-weight: 500;
      margin: 0 0.5rem;
      position: relative;
      transition: var(--transition-base);
      font-size: 15px;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent-gold);
      transition: width 0.25s ease;
    }

    .nav-link:hover {
      color: var(--accent-gold) !important;
    }

    .nav-link:hover::after {
      width: 100%;
    }

    .navbar .btn-primary-gold {
      padding: 8px 24px;
      font-size: 14px;
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      background: linear-gradient(rgba(43,29,22,0.7), rgba(43,29,22,0.65)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
    }

    .hero-content h1 {
      color: white;
      text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    }

    .hero-subtitle {
      color: var(--accent-gold);
      font-size: 18px;
      font-weight: 400;
      letter-spacing: 1px;
    }

    /* 卡片系统 */
    .card-custom {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      overflow: hidden;
      height: 100%;
    }

    .card-custom:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: rgba(201,169,110,0.4);
    }

    .card-img-wrapper {
      overflow: hidden;
      height: 220px;
    }

    .card-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .card-custom:hover .card-img-wrapper img {
      transform: scale(1.03);
    }

    .gold-diamond {
      color: var(--accent-gold);
      font-size: 24px;
    }

    /* 优势数据 */
    .advantage-number {
      font-family: var(--font-number);
      font-size: 48px;
      font-weight: 600;
      color: var(--accent-gold);
      line-height: 1.1;
    }

    /* 流程步骤 */
    .step-circle {
      width: 60px;
      height: 60px;
      background: var(--accent-gold);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 24px;
      margin: 0 auto 15px;
      position: relative;
      z-index: 2;
    }

    .process-line {
      border-top: 2px dashed var(--accent-gold);
      position: absolute;
      top: 30px;
      left: 60px;
      right: 60px;
      z-index: 1;
    }

    /* FAQ 手风琴 */
    .accordion-button {
      font-weight: 600;
      font-size: 18px;
      color: var(--text-main);
      background-color: transparent;
      box-shadow: none;
      border: 1px solid transparent;
      transition: var(--transition-base);
    }

    .accordion-button:not(.collapsed) {
      background-color: rgba(201,169,110,0.05);
      color: var(--primary-deep);
      border-color: var(--accent-gold);
      box-shadow: none;
    }

    .accordion-button::after {
      filter: invert(60%) sepia(20%) saturate(400%);
    }

    .accordion-item {
      border: 1px solid rgba(201,169,110,0.15);
      margin-bottom: 12px;
      border-radius: var(--radius-card) !important;
      overflow: hidden;
    }

    /* 表单 */
    .form-control {
      border-radius: var(--radius-input);
      border: 1px solid rgba(201,169,110,0.3);
      background-color: rgba(255,255,255,0.9);
      padding: 12px 16px;
      transition: var(--transition-base);
    }

    .form-control:focus {
      border-color: var(--accent-gold);
      box-shadow: 0 0 0 3px rgba(201,169,110,0.15);
    }

    .contact-info i {
      color: var(--accent-gold);
      width: 24px;
    }

    /* 页脚 */
    footer a {
      color: var(--text-light);
      text-decoration: none;
      transition: color 0.2s;
    }

    footer a:hover {
      color: var(--accent-gold);
    }

    @media (max-width: 768px) {
      h1 {
        font-size: 32px;
      }
      h2 {
        font-size: 26px;
      }
      .hero-section {
        min-height: 70vh;
      }
      .process-line {
        display: none;
      }
    }

    /* 粒子动画（克制） */
    .gold-particle {
      position: absolute;
      background: radial-gradient(circle, rgba(201,169,110,0.7) 0%, transparent 70%);
      border-radius: 50%;
      animation: float 6s infinite ease-in-out;
    }

    @keyframes float {
      0% { transform: translateY(0px); opacity: 0; }
      50% { opacity: 0.4; }
      100% { transform: translateY(-40px); opacity: 0; }
    }