/* roulang page: index */
:root {
    --primary-900: #122B27;
    --primary-800: #173630;
    --primary-700: #1D4238;
    --primary-600: #235046;
    --primary-100: #E4EDE8;
    --accent-600: #B08C54;
    --accent-500: #C09D63;
    --accent-700: #96733F;
    --cream: #F7F4EE;
    --ink: #1F1E1A;
    --sub: #5C5A53;
    --weak: #8A867C;
    --line: #E6E0D4;
    --white: #FFFFFF;
    --success: #3E7A5E;
    --warning: #C47A4A;
    --error: #B04A3A;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--cream);
    color: var(--ink);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; height: auto; display: block; }
  a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
  button { font-family: inherit; cursor: pointer; }
  .font-serif-custom { font-family: 'Noto Serif SC', 'Source Han Serif SC', serif; }
  .eyebrow {
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-600);
    font-weight: 600;
  }
  .line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.25s ease-out, transform 0.25s ease-out;
  }
  .fade-up.visible {
    opacity: 1;
    transform: translateY(0);
  }
  @media (prefers-reduced-motion: reduce) {
    .fade-up { opacity: 1; transform: none; transition: none; }
    * { animation: none !important; transition: none !important; }
  }
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(247, 244, 238, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
  }
  .site-header.scrolled {
    border-bottom-color: var(--line);
    box-shadow: 0 4px 20px rgba(18, 43, 39, 0.06);
  }
  .nav-link {
    position: relative;
    font-size: 0.9375rem;
    color: var(--sub);
    padding: 0.5rem 0.25rem;
    transition: color 0.2s ease;
  }
  .nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-600);
    transition: width 0.25s ease;
  }
  .nav-link:hover { color: var(--primary-600); }
  .nav-link:hover::after { width: 100%; }
  .nav-link.active { color: var(--primary-700); font-weight: 600; }
  .nav-link.active::after { width: 100%; }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--accent-600);
    color: #fff;
    font-size: 0.9375rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    transition: background-color 0.2s ease, transform 0.1s ease;
  }
  .btn-primary:hover { background-color: var(--accent-700); }
  .btn-primary:active { transform: scale(0.98); }
  .btn-primary .arrow {
    transition: transform 0.25s ease;
  }
  .btn-primary:hover .arrow { transform: translateX(4px); }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1.5px solid var(--primary-700);
    color: var(--primary-700);
    font-size: 0.9375rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    transition: all 0.2s ease;
  }
  .btn-outline:hover {
    background-color: var(--primary-700);
    color: #fff;
  }
  .btn-white-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1.5px solid rgba(255,255,255,0.7);
    color: #fff;
    font-size: 0.9375rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    transition: all 0.2s ease;
  }
  .btn-white-outline:hover {
    background-color: rgba(255,255,255,0.12);
    border-color: #fff;
  }
  .tag {
    display: inline-flex;
    align-items: center;
    font-size: 0.75rem;
    border-radius: 999px;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-100);
    color: var(--primary-700);
    font-weight: 500;
  }
  .tag-accent {
    background-color: rgba(176, 140, 84, 0.12);
    color: var(--accent-700);
  }
  .card-base {
    background-color: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
  }
  .card-base:hover {
    box-shadow: var(--shadow-lift, 0 16px 40px -8px rgba(18, 43, 39, 0.18));
    transform: translateY(-2px);
  }
  .value-item {
    border-left: 2px solid var(--accent-600);
    padding-left: 1.25rem;
  }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease, padding 0.25s ease;
    padding-top: 0;
  }
  .faq-item.open .faq-answer {
    max-height: 300px;
    padding-top: 0.75rem;
  }
  .faq-item .faq-icon {
    transition: transform 0.25s ease;
  }
  .faq-item.open .faq-icon {
    transform: rotate(45deg);
  }
  .mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }
  .mobile-menu.open {
    max-height: 480px;
  }
  .input-line {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid #C9D2CB;
    padding: 0.75rem 0.25rem;
    font-size: 0.9375rem;
    color: var(--ink);
    outline: none;
    transition: border-color 0.25s ease;
  }
  .input-line:focus {
    border-bottom-color: var(--accent-600);
    border-bottom-width: 2px;
  }
  .input-line::placeholder { color: var(--weak); }
  .bg-grid {
    background-image: radial-gradient(rgba(255,255,255,0.07) 1px, transparent 1px);
    background-size: 24px 24px;
  }
  .hero-gradient {
    background: linear-gradient(to bottom, rgba(18, 43, 39, 0.82) 0%, rgba(18, 43, 39, 0.55) 60%, rgba(18, 43, 39, 0.78) 100%);
  }
  .section-pad { padding: 4rem 0; }
  @media (min-width: 768px) {
    .section-pad { padding: 6rem 0; }
  }
  .container-custom {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  @media (min-width: 768px) {
    .container-custom { padding-left: 2rem; padding-right: 2rem; }
  }
  .process-step-num {
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    color: var(--accent-600);
    font-weight: 600;
  }
  .stat-num {
    font-family: 'Noto Serif SC', serif;
    font-weight: 600;
    color: var(--accent-600);
  }

/* roulang page: article */
:root {
            --primary-900: #122B27;
            --primary-800: #173630;
            --primary-700: #1D4238;
            --primary-600: #235046;
            --primary-100: #E4EDE8;
            --accent-600: #B08C54;
            --accent-500: #C09D63;
            --accent-700: #96733F;
            --bg: #F7F4EE;
            --card: #FFFFFF;
            --alt-block: #EFF2ED;
            --line: #E6E0D4;
            --ink: #1F1E1A;
            --sub: #5C5A53;
            --weak: #8A867C;
            --ivory: #F4F1EA;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--bg);
            color: var(--ink);
            line-height: 1.75;
            margin: 0;
        }
        .font-serif-custom {
            font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', SimSun, serif;
        }
        .container-custom {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(247, 244, 238, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: border-color .3s, box-shadow .3s;
        }
        .site-header.scrolled {
            border-bottom-color: var(--line);
            box-shadow: 0 4px 24px rgba(18, 43, 39, 0.04);
        }
        .nav-link {
            position: relative;
            font-size: 15px;
            color: var(--sub);
            padding: 6px 2px;
            transition: color .25s;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--primary-600);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .3s ease;
        }
        .nav-link:hover {
            color: var(--primary-600);
        }
        .nav-link:hover::after {
            transform: scaleX(1);
        }
        .nav-link.active {
            color: var(--primary-700);
            font-weight: 500;
        }
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-600);
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            padding: 10px 24px;
            border-radius: 6px;
            transition: background .25s, transform .15s, box-shadow .25s;
            cursor: pointer;
            border: none;
        }
        .btn-primary:hover {
            background: var(--accent-700);
            box-shadow: 0 6px 20px rgba(176, 140, 84, 0.25);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-primary .arrow {
            transition: transform .25s;
            display: inline-block;
        }
        .btn-primary:hover .arrow {
            transform: translateX(4px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary-700);
            border: 1.5px solid var(--primary-700);
            font-size: 15px;
            font-weight: 500;
            padding: 9px 22px;
            border-radius: 6px;
            transition: background .25s, color .25s, border-color .25s;
            cursor: pointer;
        }
        .btn-outline:hover {
            background: var(--primary-700);
            color: #fff;
        }
        .btn-outline:active {
            transform: scale(0.98);
        }
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .mobile-menu.open {
            max-height: 500px;
        }
        /* 面包屑 */
        .breadcrumb {
            font-size: 14px;
            color: var(--weak);
            padding: 16px 0;
        }
        .breadcrumb a {
            color: var(--sub);
            transition: color .2s;
        }
        .breadcrumb a:hover {
            color: var(--accent-600);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            color: #C0BAAE;
        }
        /* 文章正文 */
        .article-body {
            font-size: 16px;
            line-height: 1.8;
            color: #33302A;
        }
        .article-body h2 {
            font-family: 'Noto Serif SC', 'Source Han Serif SC', SimSun, serif;
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary-800);
            margin: 2rem 0 1rem;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--line);
        }
        .article-body h3 {
            font-family: 'Noto Serif SC', 'Source Han Serif SC', SimSun, serif;
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--primary-700);
            margin: 1.75rem 0 0.75rem;
        }
        .article-body p {
            margin: 0 0 1.5em;
        }
        .article-body blockquote {
            border-left: 3px solid var(--accent-600);
            background: #FAF7F2;
            padding: 16px 20px;
            margin: 1.5em 0;
            border-radius: 0 8px 8px 0;
            color: var(--sub);
            font-style: normal;
        }
        .article-body img {
            border-radius: 12px;
            margin: 1.5em auto;
            box-shadow: 0 4px 20px rgba(18,43,39,0.08);
        }
        .article-body ul {
            list-style: none;
            padding: 0;
            margin: 1em 0 1.5em;
        }
        .article-body ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 10px;
        }
        .article-body ul li::before {
            content: '';
            position: absolute;
            left: 4px;
            top: 10px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent-600);
        }
        .article-body ol {
            padding-left: 24px;
            margin: 1em 0 1.5em;
        }
        .article-body ol li {
            margin-bottom: 10px;
        }
        .article-body a {
            color: var(--accent-700);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--primary-600);
        }
        .article-body code {
            background: var(--primary-100);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 14px;
            color: var(--primary-800);
        }
        .article-body pre {
            background: var(--primary-900);
            color: #E8E5DE;
            padding: 20px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 1.5em 0;
            font-size: 14px;
            line-height: 1.6;
        }
        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }
        /* 标签徽章 */
        .badge {
            display: inline-block;
            font-size: 12px;
            border-radius: 9999px;
            padding: 4px 14px;
            background: var(--primary-100);
            color: var(--primary-700);
            font-weight: 500;
        }
        .badge-accent {
            background: #F5EDE1;
            color: var(--accent-700);
        }
        /* 卡片 */
        .card-hover {
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(18,43,39,0.10);
        }
        /* 文章卡 */
        .article-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 8px;
            overflow: hidden;
            transition: transform .3s ease, box-shadow .3s ease;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(18,43,39,0.10);
        }
        .article-card .img-wrap {
            overflow: hidden;
            aspect-ratio: 16/9;
        }
        .article-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .article-card:hover .img-wrap img {
            transform: scale(1.03);
        }
        /* FAQ 动画 */
        .faq-icon {
            transition: transform .25s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        /* 入场动画 */
        .fade-up {
            opacity: 1;
            transform: translateY(0);
            transition: opacity .25s ease-out, transform .25s ease-out;
        }
        .fade-up.init {
            opacity: 0;
            transform: translateY(20px);
        }
        @media (prefers-reduced-motion: reduce) {
            .fade-up.init {
                opacity: 1;
                transform: none;
            }
            .site-header, .btn-primary, .btn-outline, .card-hover, .article-card {
                transition: none;
            }
            html {
                scroll-behavior: auto;
            }
        }
        /* 图片暗化层 */
        .hero-overlay {
            background: linear-gradient(to bottom, rgba(18,43,39,0.75), rgba(18,43,39,0.55));
        }
        /* 骨架 */
        .prose-block {
            max-width: 720px;
            margin-left: auto;
            margin-right: auto;
        }
        /* 虚线空态 */
        .empty-state {
            border: 2px dashed #CCC5B8;
            border-radius: 12px;
            padding: 48px 24px;
            text-align: center;
            background: #FAF8F4;
        }

/* roulang page: category2 */
:root{
    --primary-900:#122B27;--primary-800:#173630;--primary-700:#1D4238;--primary-600:#235046;--primary-100:#E4EDE8;
    --accent-600:#B08C54;--accent-500:#C09D63;--accent-700:#96733F;
    --bg-cream:#F7F4EE;--bg-card:#FFFFFF;--bg-alt:#EFF2ED;
    --text-main:#1F1E1A;--text-sub:#5C5A53;--text-weak:#8A867C;--text-rev:#F4F1EA;
    --border-line:#E6E0D4;
    --radius-sm:6px;--radius-md:8px;--radius-lg:12px;
    --shadow-card:0 2px 12px rgba(18,43,39,0.06);
    --shadow-hover:0 8px 32px rgba(18,43,39,0.12);
  }
  html{scroll-behavior:smooth}
  body{font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg-cream);color:var(--text-main);line-height:1.75;-webkit-font-smoothing:antialiased}
  .font-serif-custom{font-family:'Noto Serif SC','Source Han Serif SC',SimSun,serif}
  .container-custom{max-width:1200px;margin:0 auto;padding-left:1.5rem;padding-right:1.5rem}
  .eyebrow{font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-600);font-weight:600}
  .text-sub{color:var(--text-sub)}
  .text-weak{color:var(--text-weak)}
  /* Header */
  .site-header{position:sticky;top:0;z-index:50;background:rgba(247,244,238,.92);backdrop-filter:blur(10px);transition:box-shadow .3s,border-color .3s;border-bottom:1px solid transparent}
  .site-header.scrolled{border-bottom-color:var(--border-line);box-shadow:0 2px 20px rgba(18,43,39,.06)}
  .nav-link{position:relative;font-size:.9375rem;color:var(--text-sub);padding:8px 0;transition:color .25s}
  .nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--accent-600);transition:width .3s}
  .nav-link:hover{color:var(--primary-600)}
  .nav-link:hover::after{width:100%}
  .nav-link.active{color:var(--primary-800);font-weight:600}
  .nav-link.active::after{width:100%}
  .mobile-menu{display:none;max-height:0;overflow:hidden;transition:max-height .35s ease-out}
  .mobile-menu.open{display:block;max-height:480px}
  /* Buttons */
  .btn-primary{display:inline-flex;align-items:center;gap:.5rem;background:var(--accent-600);color:#fff;font-size:.9375rem;font-weight:500;padding:.875rem 1.75rem;border-radius:var(--radius-sm);transition:background .25s,transform .15s,box-shadow .25s}
  .btn-primary .arrow{transition:transform .25s}
  .btn-primary:hover{background:var(--accent-700)}
  .btn-primary:hover .arrow{transform:translateX(4px)}
  .btn-primary:active{transform:scale(.98)}
  .btn-outline{display:inline-flex;align-items:center;gap:.5rem;background:transparent;border:1px solid var(--primary-700);color:var(--primary-700);font-size:.9375rem;font-weight:500;padding:.875rem 1.75rem;border-radius:var(--radius-sm);transition:background .25s,color .25s}
  .btn-outline:hover{background:var(--primary-700);color:#fff}
  .btn-outline:active{transform:scale(.98)}
  /* Cards */
  .case-card{background:var(--bg-card);border:1px solid var(--border-line);border-radius:var(--radius-md);overflow:hidden;transition:box-shadow .3s,transform .3s,border-color .3s}
  .case-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:var(--primary-100)}
  .case-card img{transition:transform .5s ease}
  .case-card:hover img{transform:scale(1.04)}
  /* Filter */
  .filter-btn{display:inline-flex;align-items:center;gap:.375rem;font-size:.875rem;padding:.5rem 1.25rem;border-radius:999px;border:1px solid var(--border-line);background:var(--bg-card);color:var(--text-sub);cursor:pointer;transition:all .25s}
  .filter-btn:hover{border-color:var(--accent-600);color:var(--accent-700)}
  .filter-btn.active{background:var(--primary-700);border-color:var(--primary-700);color:#fff;font-weight:500}
  /* Stat */
  .stat-block{border-left:2px solid var(--accent-600);padding-left:1.25rem}
  /* Steps */
  .step-card{background:var(--bg-card);border:1px solid var(--border-line);border-radius:var(--radius-md);padding:2rem;position:relative;transition:box-shadow .3s,transform .3s}
  .step-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
  .step-num{font-family:'Noto Serif SC',serif;font-size:2.5rem;font-weight:600;color:var(--accent-600);line-height:1}
  /* FAQ */
  .faq-item{border-bottom:1px solid var(--border-line)}
  .faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:1.25rem 0;font-size:1rem;font-weight:600;color:var(--text-main);text-align:left;cursor:pointer;background:none;border:none;transition:color .2s}
  .faq-question:hover{color:var(--primary-600)}
  .faq-icon{width:24px;height:24px;flex-shrink:0;position:relative;transition:transform .3s}
  .faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--accent-600);border-radius:2px;transition:opacity .3s}
  .faq-icon::before{width:14px;height:2px;top:11px;left:5px}
  .faq-icon::after{width:2px;height:14px;top:5px;left:11px}
  .faq-item.open .faq-icon{transform:rotate(45deg)}
  .faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease-out;color:var(--text-sub);font-size:.9375rem;line-height:1.75}
  .faq-item.open .faq-answer{max-height:300px;padding-bottom:1.25rem}
  /* CTA */
  .cta-section{background:var(--primary-800);position:relative;overflow:hidden}
  .cta-section::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.04) 1px,transparent 1px);background-size:24px 24px}
  /* Footer */
  .footer-bottom{border-top:1px solid rgba(255,255,255,.1)}
  /* Animations */
  .fade-up{opacity:0;transform:translateY(24px);transition:opacity .6s ease-out,transform .6s ease-out}
  .fade-up.in-view{opacity:1;transform:translateY(0)}
  @media (prefers-reduced-motion:reduce){
    .fade-up{opacity:1;transform:none;transition:none}
    *{scroll-behavior:auto !important}
  }
  .line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  /* Breadcrumb */
  .breadcrumb{font-size:.875rem;color:rgba(255,255,255,.7)}
  .breadcrumb a{color:rgba(255,255,255,.65);transition:color .2s}
  .breadcrumb a:hover{color:var(--accent-500)}
  /* Responsive */
  @media(max-width:1023px){
    .desktop-nav{display:none}
  }
  @media(min-width:1024px){
    .mobile-toggle{display:none}
  }

/* roulang page: category1 */
/* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            margin: 0;
            background-color: #F7F4EE;
            color: #1F1E1A;
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0;
            font-weight: 600;
        }
        p {
            margin: 0;
        }

        /* ===== Layout ===== */
        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== Type ===== */
        .font-serif-custom {
            font-family: 'Noto Serif SC', 'Source Han Serif SC', Georgia, serif;
        }
        .eyebrow {
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: #B08C54;
            display: inline-block;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(247, 244, 238, 0.9);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid transparent;
            transition: border-color .3s ease, box-shadow .3s ease;
        }
        .site-header.scrolled {
            border-color: #E6E0D4;
            box-shadow: 0 4px 20px rgba(18, 43, 39, 0.06);
        }
        .nav-link {
            position: relative;
            font-size: 0.9375rem;
            font-weight: 500;
            color: #173630;
            padding: 0.25rem 0;
            transition: color .3s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: #235046;
            border-radius: 2px;
            transition: width .3s ease;
        }
        .nav-link:hover {
            color: #235046;
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-link.active {
            color: #235046;
        }
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }
        .mobile-menu.open {
            max-height: 560px;
        }
        .mobile-menu a {
            display: block;
            transition: color .3s ease, background .3s ease;
        }
        .mobile-menu a:hover {
            color: #235046;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background-color: #B08C54;
            color: #FFFFFF;
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            font-size: 0.9375rem;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: background-color .3s ease, box-shadow .3s ease, transform .2s ease;
            box-shadow: 0 2px 8px rgba(176, 140, 84, 0.18);
        }
        .btn-primary:hover {
            background-color: #96733F;
            box-shadow: 0 4px 16px rgba(176, 140, 84, 0.3);
        }
        .btn-primary:hover .arrow {
            transform: translateX(4px);
        }
        .btn-primary .arrow {
            display: inline-block;
            transition: transform .3s ease;
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-primary:focus-visible {
            outline: 2px solid #96733F;
            outline-offset: 2px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background-color: transparent;
            color: #1D4238;
            border: 1.5px solid #1D4238;
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            font-size: 0.9375rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color .3s ease, color .3s ease, border-color .3s ease, transform .2s ease;
        }
        .btn-secondary:hover {
            background-color: #1D4238;
            color: #F4F1EA;
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn-secondary:focus-visible {
            outline: 2px solid #1D4238;
            outline-offset: 2px;
        }

        /* ===== Scroll Animation ===== */
        .fade-up {
            opacity: 1;
            transform: none;
            transition: opacity .6s ease, transform .6s ease;
        }
        .js .fade-up {
            opacity: 0;
            transform: translateY(24px);
        }
        .js .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        @media (prefers-reduced-motion: reduce) {
            .fade-up,
            .js .fade-up {
                opacity: 1;
                transform: none;
                transition: none;
            }
            * {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
        }

        /* ===== Card ===== */
        .card-base {
            background: #FFFFFF;
            border: 1px solid #E6E0D4;
            border-radius: 8px;
            overflow: hidden;
            transition: box-shadow .3s ease, transform .3s ease;
        }
        .card-base:hover {
            box-shadow: 0 12px 32px rgba(18, 43, 39, 0.08);
            transform: translateY(-2px);
        }

        /* ===== Stat ===== */
        .stat-number {
            font-family: 'Noto Serif SC', 'Source Han Serif SC', Georgia, serif;
            font-size: 2.25rem;
            font-weight: 600;
            color: #B08C54;
            line-height: 1.2;
        }
        @media (min-width: 768px) {
            .stat-number {
                font-size: 2.75rem;
            }
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --primary-900: #122B27;
            --primary-800: #173630;
            --primary-700: #1D4238;
            --primary-600: #235046;
            --primary-100: #E4EDE8;
            --accent-600: #B08C54;
            --accent-500: #C09D63;
            --accent-700: #96733F;
            --bg-cream: #F7F4EE;
            --bg-alt: #EFF2ED;
            --card-bg: #FFFFFF;
            --text-main: #1F1E1A;
            --text-sub: #5C5A53;
            --text-weak: #8A867C;
            --text-white: #F4F1EA;
            --border-line: #E6E0D4;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--bg-cream);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== 字体辅助 ===== */
        .font-serif-custom {
            font-family: 'Noto Serif SC', 'Source Han Serif SC', Georgia, serif;
        }

        /* ===== 站点头部 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(247, 244, 238, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .site-header.scrolled {
            border-bottom-color: var(--border-line);
            box-shadow: 0 2px 16px rgba(18, 43, 39, 0.06);
        }

        /* ===== 导航链接 ===== */
        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            padding: 6px 2px;
            transition: color 0.25s;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--primary-600);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease-out;
        }
        .nav-link:hover {
            color: var(--primary-600);
        }
        .nav-link:hover::after {
            transform: scaleX(1);
        }
        .nav-link.active {
            color: var(--primary-800);
            font-weight: 600;
        }
        .nav-link.active::after {
            transform: scaleX(1);
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-600);
            color: #ffffff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 24px;
            border-radius: 6px;
            transition: background 0.25s, box-shadow 0.25s, transform 0.15s;
            line-height: 1.4;
        }
        .btn-primary .arrow {
            transition: transform 0.3s;
            font-size: 18px;
            line-height: 1;
        }
        .btn-primary:hover {
            background: var(--accent-700);
            box-shadow: 0 6px 20px rgba(176, 140, 84, 0.3);
        }
        .btn-primary:hover .arrow {
            transform: translateX(4px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--primary-600);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary-700);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 24px;
            border: 1.5px solid var(--primary-700);
            border-radius: 6px;
            transition: background 0.25s, color 0.25s, transform 0.15s;
            line-height: 1.4;
        }
        .btn-secondary:hover {
            background: var(--primary-700);
            color: var(--text-white);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn-secondary:focus-visible {
            outline: 2px solid var(--accent-500);
            outline-offset: 2px;
        }

        /* ===== 小标签 ===== */
        .eyebrow {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 0.12em;
            font-weight: 600;
            color: var(--accent-600);
            text-transform: uppercase;
        }

        /* ===== 页面 Hero ===== */
        .page-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            min-height: 260px;
            display: flex;
            align-items: center;
            padding: 60px 0;
        }
        @media (min-width: 768px) {
            .page-hero {
                min-height: 320px;
                padding: 80px 0;
            }
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(18, 43, 39, 0.5), rgba(18, 43, 39, 0.78));
        }
        .page-hero>div {
            position: relative;
            z-index: 2;
        }

        .page-hero-title {
            font-family: 'Noto Serif SC', Georgia, serif;
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            font-weight: 600;
            color: var(--text-white);
            line-height: 1.25;
            margin-top: 16px;
        }
        .page-hero-desc {
            color: #D8D5CD;
            font-size: 15px;
            max-width: 560px;
            margin-top: 12px;
            line-height: 1.7;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: #D8D5CD;
        }
        .breadcrumb a {
            color: #D8D5CD;
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--accent-500);
        }
        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== 指标数字 ===== */
        .stat-number {
            font-family: 'Noto Serif SC', Georgia, serif;
            font-size: clamp(1.75rem, 2.5vw, 2.25rem);
            font-weight: 600;
            color: var(--primary-800);
            line-height: 1.15;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-sub);
            margin-top: 4px;
        }

        /* ===== 时间线 ===== */
        .timeline {
            position: relative;
            padding-left: 32px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 10px;
            bottom: 10px;
            width: 2px;
            background: var(--primary-100);
        }
        .timeline-item {
            position: relative;
            padding-bottom: 44px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 10px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--bg-cream);
            border: 3px solid var(--accent-600);
            box-shadow: 0 0 0 3px rgba(176, 140, 84, 0.15);
        }
        .timeline-year {
            font-family: 'Noto Serif SC', Georgia, serif;
            font-size: 1.75rem;
            font-weight: 600;
            color: var(--primary-700);
            line-height: 1.2;
        }
        @media (min-width: 768px) {
            .timeline-year {
                font-size: 2rem;
            }
        }
        .timeline-content {
            margin-top: 4px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== 资质荣誉卡 ===== */
        .cert-card {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: 8px;
            padding: 28px 20px;
            text-align: center;
            transition: box-shadow 0.25s, transform 0.25s, border-color 0.25s;
        }
        .cert-card:hover {
            box-shadow: 0 12px 32px rgba(18, 43, 39, 0.08);
            transform: translateY(-2px);
            border-color: var(--primary-100);
        }
        .cert-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            background: var(--primary-100);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary-700);
        }

        /* ===== 理念卡 ===== */
        .value-card {
            padding: 20px 0;
            border-bottom: 1px solid var(--border-line);
        }
        .value-card:last-child {
            border-bottom: none;
        }
        .value-index {
            font-family: 'Noto Serif SC', Georgia, serif;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-600);
            margin-bottom: 4px;
        }

        /* ===== 移动端菜单 ===== */
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .mobile-menu.open {
            max-height: 520px;
        }

        /* ===== 滚动入场 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.5s ease-out, transform 0.5s ease-out;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 图片覆盖 ===== */
        .img-cover {
            object-fit: cover;
            width: 100%;
            height: 100%;
        }

        /* ===== 板块间距 ===== */
        .section-pad {
            padding: 72px 0;
        }
        @media (min-width: 768px) {
            .section-pad {
                padding: 96px 0;
            }
        }

        /* ===== FAQ（备用） ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-line);
        }

        /* ===== 响应式导航 ===== */
        @media (max-width: 1023px) {
            .nav-desktop {
                display: none;
            }
        }
        @media (min-width: 1024px) {
            .nav-mobile-btn {
                display: none;
            }
        }

        /* ===== 减速动画偏好 ===== */
        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
            .fade-up {
                opacity: 1;
                transform: none;
            }
        }