/* roulang page: index */
:root {
      --color-primary: #1A0E0B;
      --color-accent: #C49A6C;
      --color-soft: #E6D5B8;
      --color-bg: #F9F6F0;
      --color-text: #2C2C2C;
      --color-muted: #5A5A5A;
      --color-border: #E0D7CC;
      --color-card-bg: #FFFFFF;
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-sans: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --shadow-sm: 0 4px 20px rgba(26, 14, 11, 0.06);
      --shadow-hover: 0 12px 32px rgba(26, 14, 11, 0.12);
      --radius-card: 16px;
      --radius-btn: 8px;
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--color-bg);
      color: var(--color-text);
      line-height: 1.7;
      margin: 0;
      padding-top: 72px;
      padding-bottom: 64px;
      -webkit-font-smoothing: antialiased;
    }

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

    h1 {
      font-size: 2.8rem;
      letter-spacing: 0.02em;
      line-height: 1.2;
      font-weight: 700;
    }

    h2 {
      font-size: 2rem;
      letter-spacing: 0.01em;
      line-height: 1.3;
    }

    h3 {
      font-size: 1.5rem;
      line-height: 1.4;
    }

    .text-muted-custom {
      color: var(--color-muted);
      font-size: 0.9rem;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航 */
    .navbar-custom {
      background-color: var(--color-primary);
      height: 72px;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1030;
      display: flex;
      align-items: center;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    .nav-logo {
      font-family: var(--font-serif);
      font-size: 1.7rem;
      font-weight: 700;
      color: var(--color-accent);
      text-decoration: none;
      letter-spacing: 1px;
    }
    .nav-logo:hover { color: var(--color-soft); }

    .nav-link-item {
      color: var(--color-soft) !important;
      font-weight: 500;
      margin: 0 6px;
      padding: 6px 14px !important;
      border-radius: 20px;
      transition: var(--transition);
    }
    .nav-link-item:hover, .nav-link-item.active {
      color: var(--color-accent) !important;
      text-decoration: underline;
      text-underline-offset: 6px;
      background: transparent;
    }

    /* 移动底部导航 */
    .mobile-bottom-nav {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: var(--color-primary);
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      border-top: 1px solid #3a2a25;
      z-index: 1030;
      display: none;
    }
    .mobile-tab {
      color: #b8a48c;
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 0.75rem;
      font-weight: 500;
      transition: 0.2s;
      text-decoration: none;
    }
    .mobile-tab i { font-size: 1.3rem; margin-bottom: 2px; }
    .mobile-tab.active { color: var(--color-accent); }

    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, rgba(26,14,11,0.75) 0%, rgba(26,14,11,0.5) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-content h1 {
      color: var(--color-soft);
    }
    .hero-sub {
      font-size: 1.3rem;
      color: #d4b68a;
      max-width: 600px;
    }
    .btn-primary-custom {
      background: var(--color-accent);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      font-size: 1.1rem;
    }
    .btn-primary-custom:hover {
      background: #A67C4A;
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(196,154,108,0.4);
    }
    .btn-outline-custom {
      border: 1.5px solid var(--color-accent);
      color: var(--color-accent);
      background: transparent;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-outline-custom:hover {
      background: var(--color-accent);
      color: white;
    }
    .text-link {
      color: var(--color-soft);
      text-decoration: underline;
      font-weight: 500;
    }
    .text-link:hover { color: var(--color-accent); }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }

    .card-custom {
      background: var(--color-card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      border: none;
      transition: var(--transition);
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .card-img-top {
      height: 200px;
      object-fit: cover;
      border-radius: var(--radius-card) var(--radius-card) 0 0;
    }

    .pain-point-card {
      background: transparent;
      border: none;
      box-shadow: none;
      padding: 10px;
    }
    .icon-circle {
      width: 56px;
      height: 56px;
      background: var(--color-accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.6rem;
      margin-bottom: 15px;
    }

    .data-block {
      background: var(--color-soft);
      border-radius: 24px;
      padding: 50px 20px;
    }
    .big-number {
      font-size: 3.5rem;
      font-weight: 800;
      color: var(--color-accent);
      font-family: var(--font-serif);
    }

    .testimonial-scroll {
      display: flex;
      overflow-x: auto;
      gap: 24px;
      padding-bottom: 15px;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }
    .testimonial-card {
      min-width: 300px;
      max-width: 340px;
      background: #FAF8F5;
      border-radius: 20px;
      padding: 24px;
      scroll-snap-align: start;
      border: 1px solid var(--color-border);
    }
    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--color-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--color-primary);
    }

    .accordion-button:not(.collapsed) {
      background-color: #f3ede5;
      color: var(--color-primary);
      box-shadow: none;
      border-left: 4px solid var(--color-accent);
    }
    .accordion-button {
      font-weight: 600;
      background: #F9F6F0;
      border-radius: 10px;
    }
    .accordion-item {
      border: none;
      margin-bottom: 12px;
      background: transparent;
    }

    .cta-final {
      background: var(--color-primary);
      border-radius: 32px;
      margin: 40px 20px;
      padding: 70px 20px;
      text-align: center;
      color: white;
    }

    footer {
      background: var(--color-primary);
      color: var(--color-soft);
      padding: 50px 0 80px;
    }
    .footer-logo {
      font-family: var(--font-serif);
      font-size: 1.8rem;
      color: var(--color-accent);
    }

    @media (max-width: 992px) {
      h1 { font-size: 2.2rem; }
      .navbar-custom .nav-link-item { display: none; }
      .mobile-bottom-nav { display: flex; }
      body { padding-bottom: 70px; }
      .hero-section { min-height: 70vh; }
    }
    @media (max-width: 768px) {
      section { padding: 56px 0; }
      h2 { font-size: 1.8rem; }
    }