/* roulang page: index */
:root {
            --primary: #1E2229;
            --secondary: #9A7B56;
            --secondary-dark: #836544;
            --accent: #6D5D4E;
            --bg-main: #F7F6F3;
            --bg-alt: #EFECE6;
            --border-line: #E2DFD8;
            --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: var(--font-main);
            background-color: var(--bg-main);
            color: var(--primary);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.2s ease-in-out;
        }
        
        .container-custom {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) { .container-custom { padding-left: 1.5rem; padding-right: 1.5rem; } }
        @media (min-width: 1024px) { .container-custom { padding-left: 2rem; padding-right: 2rem; } }

        .card-shadow {
            box-shadow: 0 4px 20px rgba(0,0,0,0.04);
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-shadow:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.08);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--secondary);
            color: #ffffff;
            font-weight: 500;
            padding: 0.75rem 2rem;
            border-radius: 4px;
            transition: all 0.2s ease;
            letter-spacing: 0.05em;
        }
        .btn-primary:hover {
            background-color: var(--secondary-dark);
            box-shadow: 0 4px 12px rgba(154, 123, 86, 0.25);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-line);
            background-color: #ffffff;
            color: var(--primary);
            font-weight: 500;
            padding: 0.75rem 2rem;
            border-radius: 4px;
            transition: all 0.2s ease;
        }
        .btn-outline:hover {
            border-color: var(--secondary);
            color: var(--secondary);
            background-color: #faf9f7;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--secondary);
            margin-bottom: 0.5rem;
        }

        /* Accordion Styling */
        details summary::-webkit-details-marker {
            display: none;
        }
        details summary {
            list-style: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }

        /* Progress Ring */
        .circle-ring {
            transform: rotate(-90deg);
            transform-origin: 50% 50%;
        }

/* roulang page: category1 */
:root {
            --primary: #1E2229;
            --secondary: #9A7B56;
            --secondary-dark: #836544;
            --accent: #6D5D4E;
            --bg-main: #F7F6F3;
            --bg-alt: #EFECE6;
            --border-line: #E2DFD8;
            --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        body {
            font-family: var(--font-main);
            background-color: var(--bg-main);
            color: var(--primary);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.2s ease-in-out;
        }
        .container-custom {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container-custom { padding-left: 1.5rem; padding-right: 1.5rem; }
        }
        @media (min-width: 1024px) {
            .container-custom { padding-left: 2rem; padding-right: 2rem; }
        }
        .card-shadow {
            box-shadow: 0 4px 20px rgba(0,0,0,0.04);
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-shadow:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.08);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--secondary);
            color: #ffffff;
            font-weight: 500;
            padding: 0.75rem 2rem;
            border-radius: 4px;
            transition: all 0.2s ease;
            letter-spacing: 0.05em;
        }
        .btn-primary:hover {
            background-color: var(--secondary-dark);
            box-shadow: 0 4px 12px rgba(154, 123, 86, 0.25);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-line);
            background-color: #ffffff;
            color: var(--primary);
            font-weight: 500;
            padding: 0.75rem 2rem;
            border-radius: 4px;
            transition: all 0.2s ease;
        }
        .btn-outline:hover {
            border-color: var(--secondary);
            color: var(--secondary);
            background-color: #faf9f7;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--secondary);
            margin-bottom: 0.5rem;
        }
        .filter-btn-active {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
        }

/* roulang page: category2 */
:root {
      --primary: #1E2229;
      --secondary: #9A7B56;
      --secondary-dark: #836544;
      --accent: #6D5D4E;
      --bg-main: #F7F6F3;
      --bg-alt: #EFECE6;
      --border-line: #E2DFD8;
      --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      font-family: var(--font-main);
      background-color: var(--bg-main);
      color: var(--primary);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease-in-out;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }
    @media (min-width: 640px) { .container-custom { padding-left: 1.5rem; padding-right: 1.5rem; } }
    @media (min-width: 1024px) { .container-custom { padding-left: 2rem; padding-right: 2rem; } }

    .card-shadow {
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-shadow:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(0,0,0,0.08);
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--secondary);
      color: #ffffff;
      font-weight: 500;
      padding: 0.75rem 2rem;
      border-radius: 4px;
      transition: all 0.2s ease;
      letter-spacing: 0.05em;
    }
    .btn-primary:hover {
      background-color: var(--secondary-dark);
      box-shadow: 0 4px 12px rgba(154, 123, 86, 0.25);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-line);
      background-color: #ffffff;
      color: var(--primary);
      font-weight: 500;
      padding: 0.75rem 2rem;
      border-radius: 4px;
      transition: all 0.2s ease;
    }
    .btn-outline:hover {
      border-color: var(--secondary);
      color: var(--secondary);
      background-color: #faf9f7;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--secondary);
      margin-bottom: 0.5rem;
    }