/* roulang page: index */
:root {
            --ink: #101310;
            --volt: #D4FF3F;
            --paper: #F5F6F0;
            --muted: #6B7368;
            --line: #E0E3D8;
            --live-red: #FF3B30;
            --radius-card: 16px;
            --radius-lg: 24px;
            --radius-btn: 999px;
            --shadow-card: 0 1px 2px rgba(16, 19, 16, 0.04);
            --shadow-hover: 0 12px 24px rgba(16, 19, 16, 0.08);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            font-size: 15px;
            line-height: 1.8;
            background-color: #F5F6F0;
            color: #101310;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            padding: 0;
        }
        input {
            font-family: inherit;
        }
        .schedule-scroll::-webkit-scrollbar {
            display: none;
        }
        .schedule-scroll {
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .tabular-nums {
            font-variant-numeric: tabular-nums;
            font-feature-settings: 'tnum';
        }
        .hero-pattern {
            background-image: repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.03) 0px, rgba(255, 255, 255, 0.03) 1px, transparent 1px, transparent 14px);
        }
        .site-header {
            background: transparent;
            border-bottom: 1px solid transparent;
            transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .site-header .nav-link,
        .site-header .logo-text-inner,
        .site-header .header-sub-btn {
            color: rgba(255, 255, 255, 0.92);
        }
        .site-header .header-sub-btn {
            border-color: rgba(255, 255, 255, 0.28);
        }
        .site-header.scrolled {
            background: rgba(245, 246, 240, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(224, 227, 216, 0.8);
            box-shadow: 0 1px 8px rgba(16, 19, 16, 0.04);
        }
        .site-header.scrolled .nav-link,
        .site-header.scrolled .logo-text-inner,
        .site-header.scrolled .header-sub-btn {
            color: #101310;
        }
        .site-header.scrolled .header-sub-btn {
            border-color: rgba(16, 19, 16, 0.25);
        }
        .nav-link {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.08em;
            padding: 4px 0;
            transition: color 0.2s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 1px;
            background-color: #D4FF3F;
            transform: scaleX(0);
            transform-origin: right center;
            transition: transform 0.25s ease;
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
            transform-origin: left center;
        }
        .nav-link.active::before {
            content: '';
            position: absolute;
            left: -8px;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background-color: #D4FF3F;
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid #D4FF3F;
            outline-offset: 2px;
            border-radius: 4px;
        }
        .line-clamp-1,
        .line-clamp-2,
        .line-clamp-3 {
            display: -webkit-box;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .line-clamp-1 {
            -webkit-line-clamp: 1;
        }
        .line-clamp-2 {
            -webkit-line-clamp: 2;
        }
        .line-clamp-3 {
            -webkit-line-clamp: 3;
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.28s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-item .faq-dot {
            transition: all 0.2s ease;
        }
        .faq-item.open .faq-dot {
            width: 2px;
            height: 16px;
            border-radius: 1px;
            background-color: #D4FF3F;
        }
        .faq-item .faq-icon {
            transition: transform 0.25s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }
        .schedule-item {
            transition: border-color 0.2s ease;
        }
        .schedule-item:hover {
            border-color: #D4FF3F !important;
        }
        .card-hover {
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }
        .card-hover:hover {
            box-shadow: 0 12px 24px rgba(16, 19, 16, 0.08);
            transform: translateY(-2px);
        }
        .img-zoom img {
            transition: transform 0.5s ease;
        }
        .img-zoom:hover img {
            transform: scale(1.05);
        }
        .btn-primary {
            transition: filter 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
        }
        .btn-primary:hover {
            filter: brightness(1.08);
            box-shadow: 0 4px 24px rgba(212, 255, 63, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            transition: background-color 0.2s ease, transform 0.15s ease, border-color 0.2s ease, color 0.2s ease;
        }
        .btn-secondary:hover {
            background-color: rgba(212, 255, 63, 0.08);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .arrow-hover .arrow-icon {
            transition: transform 0.2s ease;
        }
        .arrow-hover:hover .arrow-icon {
            transform: translateX(3px);
        }
        @media (max-width: 767px) {
            .site-header {
                background: rgba(16, 19, 16, 0.55);
                backdrop-filter: blur(8px);
                -webkit-backdrop-filter: blur(8px);
            }
            .site-header.scrolled {
                background: rgba(245, 246, 240, 0.92);
            }
        }

/* roulang page: category1 */
:root {
            --ink: #101310;
            --volt: #D4FF3F;
            --paper: #F5F6F0;
            --sub: #6B7368;
            --line: #E0E3D8;
            --live: #FF3B30;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 6px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background: var(--paper);
            color: var(--ink);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-site {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 16px;
            padding-right: 16px;
        }
        @media (min-width: 768px) {
            .container-site {
                padding-left: 32px;
                padding-right: 32px;
            }
        }
        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.08em;
            color: rgba(255, 255, 255, 0.85);
            transition: color 0.2s ease;
            padding: 6px 2px;
        }
        .nav-link:hover {
            color: var(--volt);
        }
        .nav-link.active {
            color: #fff;
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: -2px;
            width: 6px;
            height: 6px;
            border-radius: 999px;
            background: var(--volt);
        }
        .nav-link-light {
            color: rgba(16, 19, 16, 0.75);
        }
        .nav-link-light:hover {
            color: var(--ink);
        }
        .nav-link-light.active {
            color: var(--ink);
        }
        .faq-item {
            border-bottom: 1px solid var(--line);
        }
        .faq-item:first-of-type {
            border-top: 1px solid var(--line);
        }
        .faq-q {
            cursor: pointer;
            padding: 22px 0;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            font-size: 16px;
            font-weight: 600;
            transition: color 0.2s ease;
            user-select: none;
        }
        .faq-q:hover {
            color: var(--ink);
        }
        .faq-dot {
            flex-shrink: 0;
            width: 8px;
            height: 8px;
            border-radius: 999px;
            background: var(--volt);
            margin-top: 10px;
            transition: border-radius 0.2s ease, background 0.2s ease;
        }
        .faq-item.open .faq-dot {
            border-radius: 2px;
            background: var(--ink);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.28s ease, padding 0.28s ease;
            padding-left: 22px;
            color: var(--sub);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.open .faq-a {
            max-height: 500px;
            padding-bottom: 22px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 55px;
            padding: 0 34px;
            border-radius: 999px;
            background: var(--volt);
            color: var(--ink);
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.02em;
            transition: all 0.2s ease;
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            filter: brightness(1.08);
            box-shadow: 0 0 24px rgba(212, 255, 63, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--volt);
            outline-offset: 2px;
        }
        .btn-ghost-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-weight: 500;
            font-size: 14px;
            transition: all 0.2s ease;
            background: transparent;
            cursor: pointer;
        }
        .btn-ghost-light:hover {
            background: rgba(212, 255, 63, 0.08);
            border-color: var(--volt);
            color: var(--volt);
        }
        .btn-ghost-light:active {
            transform: scale(0.98);
        }
        .btn-ghost-dark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            border: 1px solid rgba(16, 19, 16, 0.25);
            color: var(--ink);
            font-weight: 500;
            font-size: 14px;
            transition: all 0.2s ease;
            background: transparent;
            cursor: pointer;
        }
        .btn-ghost-dark:hover {
            background: rgba(212, 255, 63, 0.15);
            border-color: var(--ink);
        }
        .btn-ghost-dark:active {
            transform: scale(0.98);
        }
        .card-img-wrap {
            overflow: hidden;
            border-radius: var(--radius-lg);
        }
        .card-img-wrap img {
            transition: transform 0.5s ease;
        }
        .card-img-wrap:hover img {
            transform: scale(1.05);
        }
        .num-tabular {
            font-variant-numeric: tabular-nums;
            font-feature-settings: 'tnum';
        }
        .hide-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .hide-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .text-gradient-volt {
            background: linear-gradient(135deg, #D4FF3F 0%, #A8E40A 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-grid-overlay {
            background-image: linear-gradient(rgba(212, 255, 63, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(212, 255, 63, 0.05) 1px, transparent 1px);
            background-size: 40px 40px;
        }
        .breadcrumb-link {
            color: var(--sub);
            transition: color 0.2s ease;
        }
        .breadcrumb-link:hover {
            color: var(--ink);
        }
        .arrow-link .arrow-icon {
            transition: transform 0.2s ease;
        }
        .arrow-link:hover .arrow-icon {
            transform: translateX(4px);
        }
        .text-link-dark {
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s ease, color 0.2s ease;
        }
        .text-link-dark:hover {
            color: var(--ink);
            border-color: var(--ink);
        }
        .section-padding {
            padding-top: 64px;
            padding-bottom: 64px;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding-top: 96px;
                padding-bottom: 96px;
            }
        }
        .point-item {
            position: relative;
            padding-left: 0;
        }
        .point-num {
            font-variant-numeric: tabular-nums;
            font-weight: 800;
            font-size: 28px;
            color: var(--volt);
            line-height: 1;
            min-width: 52px;
        }
        input:focus-visible {
            outline: 2px solid var(--volt);
            outline-offset: 2px;
        }
        .cta-section {
            background: var(--volt);
            border-radius: 24px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(16, 19, 16, 0.08);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 20%;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(16, 19, 16, 0.06);
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-hover:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(16, 19, 16, 0.08);
        }

/* roulang page: article */
:root {
    --ink: #101310;
    --volt: #D4FF3F;
    --paper: #F5F6F0;
    --muted: #6B7368;
    --border: #E0E3D8;
    --live: #FF3B30;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; }

.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 50;
    transition: background .3s ease, box-shadow .3s ease;
}
.site-header.article-header {
    background: rgba(245,246,240,.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}
.site-header.article-header .nav-link {
    color: rgba(16,19,16,.72);
}
.site-header.article-header .nav-link:hover,
.site-header.article-header .nav-link.active {
    color: var(--ink);
}
.site-header.article-header .nav-link.active::after {
    background: var(--volt);
}
.site-header.article-header .header-cta {
    border-color: rgba(16,19,16,.25);
    color: var(--ink);
}
.site-header.article-header .header-cta:hover {
    background: var(--volt);
    border-color: var(--volt);
    color: var(--ink);
}

.nav-link {
    position: relative;
    font-size: 14.5px;
    letter-spacing: .08em;
    font-weight: 500;
    transition: color .25s;
}
.nav-link::after {
    content: '';
    position: absolute;
    left: 0; bottom: -6px;
    width: 0; height: 2px;
    background: var(--volt);
    transition: width .3s ease;
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.tabular-nums {
    font-variant-numeric: tabular-nums;
    font-family: 'Inter', 'Helvetica Neue', 'PingFang SC', sans-serif;
}

.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

.article-body {
    font-size: 16px;
    line-height: 1.9;
    color: #2A2F2A;
}
.article-body > * + * { margin-top: 1.2em; }
.article-body h2 {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.4;
    margin-top: 2.2em;
    margin-bottom: .8em;
    padding-left: 16px;
    border-left: 4px solid var(--volt);
}
.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
    margin-top: 1.8em;
    margin-bottom: .6em;
}
.article-body p { margin-bottom: 1.2em; }
.article-body img {
    border-radius: 16px;
    margin-top: 2em;
    margin-bottom: 2em;
}
.article-body figure { margin: 2em 0; }
.article-body figcaption {
    text-align: center;
    font-size: 13px;
    color: var(--muted);
    margin-top: 8px;
}
.article-body blockquote {
    border-left: 3px solid var(--volt);
    background: #EFF1EA;
    padding: 16px 24px;
    border-radius: 0 12px 12px 0;
    color: var(--muted);
    font-size: 15px;
}
.article-body ul {
    list-style: disc;
    padding-left: 1.4em;
    margin: 1em 0;
}
.article-body ol {
    list-style: decimal;
    padding-left: 1.4em;
    margin: 1em 0;
}
.article-body li { margin-bottom: .5em; }
.article-body a {
    color: #3D7E00;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color .2s;
}
.article-body a:hover { color: var(--ink); }
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 14px;
}
.article-body th,
.article-body td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.article-body th {
    background: var(--paper);
    font-weight: 600;
}

.breadcrumb a:hover { color: var(--ink); }

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--muted);
    transition: color .2s, transform .2s;
}
.back-link:hover { color: var(--ink); }
.back-link .arrow { transition: transform .2s; }
.back-link:hover .arrow { transform: translateX(-3px); }

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--volt);
    outline-offset: 2px;
    border-radius: 4px;
}

@media (max-width: 768px) {
    .article-body { font-size: 15px; }
    .article-body h2 { font-size: 22px; }
    .article-body h3 { font-size: 18px; }
}

/* roulang page: category2 */
:root {
            --ink: #101310;
            --volt: #D4FF3F;
            --paper: #F5F6F0;
            --muted: #6B7368;
            --line: #E0E3D8;
            --live: #FF3B30;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 6px;
            --shadow-card: 0 1px 2px rgba(16, 19, 16, .04);
            --shadow-hover: 0 12px 24px rgba(16, 19, 16, .08);
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background-color: #fff;
            color: var(--ink);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        
        img {
            max-width: 100%;
            display: block;
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        .tabular-nums {
            font-variant-numeric: tabular-nums;
        }
        
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        
        /* 导航 */
        header.site-header {
            transition: background-color .3s ease, box-shadow .3s ease;
            background-color: transparent;
        }
        header.site-header .nav-link {
            color: rgba(255, 255, 255, .85);
            position: relative;
            transition: color .2s ease;
            letter-spacing: .08em;
            font-size: 14px;
            font-weight: 500;
            padding: 4px 0;
        }
        header.site-header .nav-link:hover {
            color: var(--volt);
        }
        header.site-header .nav-link.active {
            color: #fff;
            font-weight: 600;
        }
        header.site-header .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background-color: var(--volt);
            border-radius: 2px;
        }
        header.site-header.scrolled {
            background-color: rgba(245, 246, 240, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 1px 0 rgba(0, 0, 0, .06);
        }
        header.site-header.scrolled .nav-link {
            color: rgba(16, 19, 16, .75);
        }
        header.site-header.scrolled .nav-link:hover {
            color: #101310;
        }
        header.site-header.scrolled .nav-link.active {
            color: #101310;
            font-weight: 600;
        }
        header.site-header.scrolled .nav-link.active::after {
            background-color: var(--volt);
        }
        
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            background-color: var(--volt);
            color: #101310;
            font-weight: 700;
            font-size: 15px;
            letter-spacing: .02em;
            border: none;
            cursor: pointer;
            transition: all .2s ease;
        }
        .btn-primary:hover {
            filter: brightness(1.08);
            box-shadow: 0 0 20px rgba(212, 255, 63, .3);
        }
        .btn-primary:active {
            transform: scale(.98);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--volt);
            outline-offset: 2px;
        }
        
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 24px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, .5);
            color: #fff;
            font-weight: 500;
            font-size: 14px;
            background: transparent;
            cursor: pointer;
            transition: all .2s ease;
        }
        .btn-outline:hover {
            background: rgba(212, 255, 63, .08);
            border-color: var(--volt);
            color: var(--volt);
        }
        .btn-outline:active {
            transform: scale(.98);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--volt);
            outline-offset: 2px;
        }
        
        /* 焦点样式 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--volt);
            outline-offset: 3px;
        }
        
        /* FAQ 手风琴 */
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease, opacity .3s ease;
            opacity: 0;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            opacity: 1;
        }
        .faq-item .faq-toggle-icon {
            transition: transform .3s ease;
        }
        .faq-item.open .faq-toggle-icon {
            transform: rotate(45deg);
        }
        
        /* 卡片 */
        .content-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: transform .25s ease, box-shadow .25s ease;
            overflow: hidden;
        }
        .content-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .content-card .card-img-wrap {
            overflow: hidden;
        }
        .content-card .card-img-wrap img {
            transition: transform .45s ease;
        }
        .content-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        
        /* 特色卡 */
        .feature-card {
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-lg);
            transition: border-color .25s ease, background .25s ease;
        }
        .feature-card:hover {
            border-color: rgba(212, 255, 63, .5);
            background: rgba(255, 255, 255, .08);
        }
        
        /* 移动端菜单 */
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .mobile-menu.open {
            max-height: 400px;
        }
        
        /* 面包屑 */
        .breadcrumb a {
            color: rgba(255, 255, 255, .6);
            transition: color .2s;
        }
        .breadcrumb a:hover {
            color: var(--volt);
        }
        
        /* 图片说明 */
        .figcaption {
            font-size: 13px;
            color: var(--muted);
            text-align: center;
            margin-top: 8px;
        }
        
        /* 滚动条 */
        @media (max-width: 768px) {
            header.site-header .nav-link {
                color: rgba(255, 255, 255, .9);
            }
        }