/* roulang page: index */
:root {
    --primary: #0E6B5C;
    --primary-dark: #0A4F44;
    --accent: #F26B3A;
    --accent-hover: #D9561F;
    --paper: #F7F4EE;
    --mist: #EDF1EC;
    --ink: #1B2B27;
    --ink-soft: #5C6F69;
    --ink-mute: #8A9D96;
    --line: #DDE5DF;
    --success: #2B7A6B;
    --radius-lg: 20px;
    --shadow-card: 0 2px 12px rgba(15, 60, 50, 0.06);
    --shadow-hover: 0 10px 28px rgba(15, 60, 50, 0.12);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

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

  button, input, select, textarea {
    font-family: inherit;
  }

  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  @media (min-width: 768px) {
    .container {
      padding-left: 2rem;
      padding-right: 2rem;
    }
  }

  .nav-link {
    padding: 0.625rem 0.25rem;
    color: #5C6F69;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
  }

  .nav-link:hover {
    color: #0E6B5C;
  }

  .nav-link.active {
    color: #0E6B5C;
    font-weight: 600;
    border-bottom-color: #0E6B5C;
  }

  .btn-primary {
    background: var(--accent);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.2s, transform 0.15s;
  }

  .btn-primary:hover {
    background: var(--accent-hover);
  }

  .btn-primary:active {
    transform: scale(0.95);
  }

  .btn-secondary {
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.2s, color 0.2s, transform 0.15s;
  }

  .btn-secondary:hover {
    background: var(--primary);
    color: #fff;
  }

  .btn-secondary:active {
    transform: scale(0.95);
  }

  .badge-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    background: rgba(14, 107, 92, 0.10);
    color: #0E6B5C;
  }

  .badge-accent {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    background: rgba(242, 107, 58, 0.10);
    color: #D9561F;
  }

  .card-base {
    background: #fff;
    border: 1px solid #DDE5DF;
    border-radius: 20px;
    padding: 1.25rem;
    box-shadow: 0 2px 12px rgba(15, 60, 50, 0.06);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
  }

  .card-base:hover {
    box-shadow: 0 10px 28px rgba(15, 60, 50, 0.12);
    transform: translateY(-4px);
  }

  .section-title {
    position: relative;
    padding-left: 1rem;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.35;
    color: #1B2B27;
  }

  .section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 26px;
    border-radius: 9999px;
    background: #0E6B5C;
  }

  @media (min-width: 768px) {
    .section-title {
      font-size: 30px;
    }
  }

  .line-clamp-1 {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .scrollbar-hide::-webkit-scrollbar {
    display: none;
  }

  .scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }

  .bg-grid-pattern {
    background-image:
      linear-gradient(to right, rgba(14, 107, 92, 0.05) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(14, 107, 92, 0.05) 1px, transparent 1px);
    background-size: 32px 32px;
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
  }

  .faq-item.open .faq-answer {
    padding-bottom: 1rem;
  }

  .faq-icon {
    transition: transform 0.3s ease;
    flex-shrink: 0;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
  }

  .article-body h2,
  .article-body h3,
  .article-body h4 {
    margin-top: 1.6em;
    margin-bottom: 0.6em;
    font-weight: 700;
    color: #1B2B27;
    line-height: 1.4;
  }

  .article-body p {
    margin-bottom: 1.2em;
    font-size: 16px;
    line-height: 1.9;
    color: #2A3633;
  }

  .article-body ul,
  .article-body ol {
    margin: 1em 0;
    padding-left: 1.5em;
  }

  .article-body li {
    margin-bottom: 0.5em;
    line-height: 1.7;
  }

  .article-body blockquote {
    border-left: 4px solid #0E6B5C;
    background: #EDF1EC;
    padding: 1em 1.25em;
    margin: 1.4em 0;
    font-style: italic;
    border-radius: 0 12px 12px 0;
  }

  .article-body img {
    border-radius: 12px;
    border: 1px solid #DDE5DF;
    margin: 1.5em 0;
  }

  .article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
  }

  .article-body th,
  .article-body td {
    border: 1px solid #DDE5DF;
    padding: 0.75em;
    text-align: left;
  }

  .article-body code {
    background: #EDF1EC;
    border-radius: 4px;
    padding: 0.2em 0.4em;
    font-size: 0.9em;
  }

  .article-body pre {
    background: #1B2B27;
    color: #fff;
    border-radius: 12px;
    padding: 1.25em;
    overflow-x: auto;
  }

  @keyframes floatUp {
    0% {
      transform: translateY(12px);
      opacity: 0;
    }
    100% {
      transform: translateY(0);
      opacity: 1;
    }
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }

  .animate-float-up {
    animation: floatUp 0.5s ease both;
  }

  .animate-fade-in {
    animation: fadeIn 0.5s ease both;
  }

  .faq-answer a {
    color: #0E6B5C;
  }

  .faq-answer a:hover {
    text-decoration: underline;
  }

/* roulang page: article */
:root {
            --primary: #0E6B5C;
            --primary-dark: #0A4F44;
            --accent: #F26B3A;
            --accent-hover: #D9561F;
            --bg-paper: #F7F4EE;
            --bg-mist: #EDF1EC;
            --text-ink: #1B2B27;
            --text-soft: #5C6F69;
            --border-line: #DDE5DF;
            --radius-card: 16px;
            --shadow-card: 0 2px 12px rgba(15, 60, 50, 0.06);
            --shadow-hover: 0 10px 28px rgba(15, 60, 50, 0.12);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg-paper);
            color: var(--text-ink);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        .nav-link {
            padding: 0.35rem 0.2rem;
            white-space: nowrap;
            color: var(--text-soft);
            transition: color 0.2s;
            border-bottom: 2px solid transparent;
            line-height: 1.4;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            border-bottom-color: var(--primary);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent);
            color: #fff;
            padding: 0.6rem 1.5rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.2s;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
        }
        .btn-primary:active {
            transform: scale(0.96);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 0.6rem 1.5rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.2s;
            background: transparent;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.2rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(242, 107, 58, 0.1);
            color: var(--accent-hover);
        }
        .badge-green {
            background: rgba(14, 107, 92, 0.1);
            color: var(--primary);
        }
        .section-title-wrap {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .section-title-wrap::before {
            content: '';
            display: block;
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
            flex-shrink: 0;
        }
        .section-title-wrap h2 {
            font-weight: 700;
            line-height: 1.3;
        }
        .scrollbar-hide {
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }
        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: #2A3633;
        }
        .article-body p {
            margin-bottom: 1.5rem;
        }
        .article-body p:first-child {
            font-size: 18px;
        }
        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 2rem 0 1rem;
            color: var(--text-ink);
            line-height: 1.35;
        }
        .article-body h3 {
            font-size: 19px;
            font-weight: 600;
            margin: 1.75rem 0 0.875rem;
            color: var(--text-ink);
        }
        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            margin: 1.5rem 0 0.75rem;
            color: var(--text-ink);
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 1.5rem 1.5rem;
            padding: 0;
        }
        .article-body ul {
            list-style: disc;
        }
        .article-body ol {
            list-style: decimal;
        }
        .article-body li {
            margin-bottom: 0.5rem;
        }
        .article-body blockquote {
            background: var(--bg-mist);
            border-left: 4px solid var(--primary);
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            margin: 1.75rem 0;
            color: #3a4a44;
        }
        .article-body img {
            border-radius: 12px;
            border: 1px solid var(--border-line);
            margin: 1.5rem auto;
            width: auto;
            max-width: 100%;
            height: auto;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.75rem 0;
            font-size: 14px;
        }
        .article-body table th,
        .article-body table td {
            border: 1px solid var(--border-line);
            padding: 0.75rem 1rem;
            text-align: left;
        }
        .article-body table th {
            background: var(--bg-mist);
            font-weight: 600;
        }
        .article-body code {
            background: var(--bg-mist);
            padding: 0.15rem 0.5rem;
            border-radius: 6px;
            font-size: 0.9em;
            font-family: "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
        }
        .article-body pre {
            background: #1B2B27;
            color: #e6efe9;
            padding: 1.25rem 1.5rem;
            border-radius: 12px;
            overflow-x: auto;
            margin: 1.75rem 0;
            line-height: 1.7;
            font-size: 14px;
        }
        .article-body pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--accent);
        }
        .search-input::placeholder {
            color: #9aa8a2;
        }
        @media (max-width: 767px) {
            .mobile-search-expand {
                display: block;
                padding: 0.75rem 1rem;
            }
        }
        @media (min-width: 768px) {
            .mobile-search-expand {
                display: none;
            }
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.3rem 0.875rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            background: rgba(14, 107, 92, 0.08);
            color: var(--primary);
            border: 1px solid transparent;
            transition: all 0.2s;
        }
        .tag-pill:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .related-card {
            transition: all 0.2s ease;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(16px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeInUp 0.5s ease-out both;
        }

/* roulang page: category2 */
:root {
            --primary: #0E6B5C;
            --primary-dark: #0A4F44;
            --accent: #F26B3A;
            --accent-hover: #D9561F;
            --paper: #F7F4EE;
            --mist: #EDF1EC;
            --ink: #1B2B27;
            --ink-soft: #5C6F69;
            --line: #DDE5DF;
            --shadow-card: 0 2px 12px rgba(15, 60, 50, 0.06);
            --shadow-hover: 0 10px 28px rgba(15, 60, 50, 0.12);
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--paper);
            color: var(--ink);
            line-height: 1.7;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            display: block;
            max-width: 100%;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        @media (min-width: 768px) {
            .container {
                padding: 0 2rem;
            }
        }
        .nav-link {
            position: relative;
            white-space: nowrap;
            padding: 0.5rem 0;
            color: var(--ink-soft);
            transition: color .2s;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            border-bottom: 2px solid var(--primary);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            border-radius: 9999px;
            font-weight: 600;
            transition: all .2s;
            border: none;
            font-size: 15px;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }
        .btn-outline {
            border: 1px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
        }
        .btn-white:hover {
            background: var(--mist);
        }
        .btn-ghost-white {
            border: 1px solid rgba(255, 255, 255, .7);
            color: #fff;
            background: transparent;
        }
        .btn-ghost-white:hover {
            background: rgba(255, 255, 255, .12);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 500;
            line-height: 1.4;
        }
        .badge-primary {
            background: rgba(14, 107, 92, .1);
            color: var(--primary);
        }
        .badge-accent {
            background: rgba(242, 107, 58, .1);
            color: var(--accent-hover);
        }
        .card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 1rem;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .2s, transform .2s;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .section-title {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--ink);
            border-left: 4px solid var(--primary);
            padding-left: 0.75rem;
            margin: 0;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 30px;
            }
        }
        .filter-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.5rem 1.25rem;
            border-radius: 9999px;
            border: 1px solid var(--line);
            background: #fff;
            color: var(--ink-soft);
            font-size: 14px;
            font-weight: 500;
            transition: all .2s;
            white-space: nowrap;
        }
        .filter-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .filter-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .pagination-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 9999px;
            border: 1px solid var(--line);
            background: #fff;
            color: var(--ink-soft);
            font-size: 14px;
            transition: all .2s;
            flex-shrink: 0;
        }
        .pagination-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .pagination-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }
        .faq-item {
            border-bottom: 1px solid var(--line);
            padding: 1rem 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--ink);
            gap: 1rem;
        }
        .faq-icon {
            transition: transform .3s;
            flex-shrink: 0;
            font-size: 20px;
            line-height: 1;
            color: var(--primary);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            display: none;
            color: var(--ink-soft);
            font-size: 14px;
            line-height: 1.8;
            padding-top: 0.75rem;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .step-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 1rem;
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            transition: box-shadow .2s, transform .2s;
            height: 100%;
        }
        .step-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            letter-spacing: -0.02em;
        }
        .stat-card {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: 1rem;
            padding: 1.75rem 1.5rem;
            text-align: center;
        }
        @media (max-width: 767px) {
            .btn {
                padding: 0.65rem 1.25rem;
                font-size: 14px;
            }
            .filter-btn {
                padding: 0.4rem 1rem;
                font-size: 13px;
            }
        }

/* roulang page: category1 */
:root {
      --primary: #0E6B5C;
      --primary-dark: #0A4F44;
      --accent: #F26B3A;
      --accent-hover: #D9561F;
      --paper: #F7F4EE;
      --paper-soft: #EDF1EC;
      --ink: #1B2B27;
      --ink-soft: #5C6F69;
      --line: #DDE5DF;
      --radius: 1rem;
      --shadow-card: 0 2px 12px rgba(15, 60, 50, 0.06);
      --shadow-card-hover: 0 10px 28px rgba(15, 60, 50, 0.12);
    }
    * {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: var(--paper);
      color: var(--ink);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
      outline: 2px solid rgba(14, 107, 92, 0.5);
      outline-offset: 2px;
    }
    img {
      display: block;
      max-width: 100%;
    }
    button,
    input {
      font: inherit;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }
    @media (min-width: 768px) {
      .container {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    .nav-link {
      position: relative;
      white-space: nowrap;
      color: var(--ink-soft);
      transition: color 0.2s ease;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link.active {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -9px;
      height: 2px;
      border-radius: 2px;
      background: var(--primary);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      border-radius: 999px;
      padding: 0.75rem 1.5rem;
      font-weight: 600;
      font-size: 0.9375rem;
      line-height: 1.2;
      white-space: nowrap;
      transition: all 0.2s ease;
    }
    .btn:active {
      transform: scale(0.96);
    }
    .btn-primary {
      background: var(--accent);
      color: #fff;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
    }
    .btn-outline {
      border: 1px solid var(--primary);
      color: var(--primary);
      background: transparent;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: #fff;
    }
    .btn-white {
      background: #fff;
      color: var(--primary);
    }
    .btn-white:hover {
      background: #f0f0f0;
    }
    .btn-outline-white {
      border: 1px solid rgba(255, 255, 255, 0.6);
      color: #fff;
      background: transparent;
    }
    .btn-outline-white:hover {
      background: #fff;
      color: var(--primary-dark);
    }
    .card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 1rem;
      padding: 1.25rem;
      box-shadow: var(--shadow-card);
      transition: box-shadow 0.2s ease, transform 0.2s ease;
    }
    .card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
      padding: 0.25rem 0.75rem;
      border-radius: 999px;
      font-size: 0.75rem;
      font-weight: 500;
      line-height: 1.4;
    }
    .scrollbar-hide::-webkit-scrollbar {
      display: none;
    }
    .scrollbar-hide {
      -ms-overflow-style: none;
      scrollbar-width: none;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }
    .faq-item.open .faq-answer {
      max-height: 400px;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: var(--accent);
      color: #fff;
    }
    .faq-icon {
      transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
    }
    .hero-grid-bg {
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
      background-size: 32px 32px;
    }
    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(18px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    .hero-content {
      animation: fadeInUp 0.7s ease-out both;
    }
    @keyframes floatSoft {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }
    .float-soft {
      animation: floatSoft 3.2s ease-in-out infinite;
    }
    .section-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 2.75rem;
      height: 2.75rem;
      border-radius: 0.75rem;
      background: rgba(14, 107, 92, 0.1);
      color: var(--primary);
      flex-shrink: 0;
    }
    @media (max-width: 767px) {
      .faq-icon {
        width: 2rem;
        height: 2rem;
        font-size: 1.125rem;
      }
    }

/* roulang page: category3 */
:root {
  --primary: #0E6B5C;
  --primary-dark: #0A4F44;
  --accent: #F26B3A;
  --accent-dark: #D9561F;
  --bg: #F7F4EE;
  --bg-alt: #EDF1EC;
  --text: #1B2B27;
  --text-2: #5C6F69;
  --border: #DDE5DF;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
.container { max-width: 1280px; margin-inline: auto; padding-inline: 1rem; }
@media (min-width: 768px) {
  .container { padding-inline: 2rem; }
}
.scrollbar-hide::-webkit-scrollbar { display: none; }
.scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }
.nav-link {
  white-space: nowrap;
  color: var(--text-2);
  transition: color .2s ease;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
  border-bottom: 2px solid var(--primary);
}
.hero-grid-bg {
  background-image:
    linear-gradient(rgba(255,255,255,0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.10) 1px, transparent 1px);
  background-size: 44px 44px;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
}
.faq-item.open .faq-answer {
  max-height: 320px;
  padding-bottom: .75rem;
}
.faq-icon {
  transition: transform .3s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background-color: var(--primary);
  color: #fff;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.animate-float { animation: float 4s ease-in-out infinite; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp .6s ease both; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}