/* roulang page: index */
:root {
            --paper-ivory: #FBFBFA;
            --cool-slate: #F4F5F7;
            --carbon-black: #1A1D20;
            --lead-gray: #4A5056;
            --slate-gray: #767E86;
            --bronze-gold: #967D46;
            --bronze-gold-hover: #826a38;
            --crimson-brown: #80333A;
            --precision-line: #E2E4E8;
            --pure-white: #FFFFFF;
            --subtle-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.08);
            --serif-font: -apple-system, "Noto Serif SC", "Source Han Serif SC", SimSun, "PingFang SC", serif;
            --sans-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

        /* Base Resets */
        *, *::before, *::after {
            box-sizing: border-box;
        }

        body {
            background-color: var(--paper-ivory);
            color: var(--carbon-black);
            font-family: var(--sans-font);
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.01em;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5, .serif-text {
            font-family: var(--serif-font);
            font-weight: 700;
            line-height: 1.35;
            color: var(--carbon-black);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease;
        }
        a:hover {
            color: var(--bronze-gold);
        }

        .section-separator {
            border-top: 1px solid var(--precision-line);
        }

        /* Magazine Masthead Navigation */
        .top-info-bar {
            background-color: var(--pure-white);
            border-bottom: 3px double var(--precision-line);
            padding: 7px 0;
            font-size: 0.8125rem;
            color: var(--slate-gray);
        }
        .top-info-bar .badge-compliance {
            background-color: transparent;
            border: 1px solid var(--bronze-gold);
            color: var(--bronze-gold);
            font-weight: 500;
            padding: 2px 8px;
            border-radius: 2px;
            margin-right: 12px;
        }

        .masthead-core {
            padding: 38px 0 24px;
            background-color: var(--paper-ivory);
            text-align: center;
        }
        .masthead-title {
            font-size: 2.75rem;
            letter-spacing: 0.15em;
            margin: 0;
            color: var(--carbon-black);
            font-family: var(--serif-font);
            font-weight: 800;
        }
        .masthead-subtitle {
            font-size: 0.9375rem;
            color: var(--slate-gray);
            letter-spacing: 0.25em;
            text-transform: uppercase;
            margin-top: 8px;
            font-weight: 500;
        }

        .masthead-nav-bar {
            border-top: 1px solid var(--precision-line);
            border-bottom: 1px solid var(--precision-line);
            background-color: var(--pure-white);
            position: sticky;
            top: 0;
            z-index: 1020;
        }
        .nav-editorial {
            display: flex;
            justify-content: center;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-editorial > li {
            position: relative;
        }
        .nav-editorial > li:not(:last-child)::after {
            content: "•";
            color: var(--precision-line);
            position: absolute;
            right: -3px;
            top: 50%;
            transform: translateY(-50%);
        }
        .nav-editorial > li > a {
            display: block;
            padding: 14px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--carbon-black);
            position: relative;
        }
        .nav-editorial > li > a::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background-color: var(--bronze-gold);
            transition: all 0.25s ease;
            transform: translateX(-50%);
        }
        .nav-editorial > li > a:hover::after,
        .nav-editorial > li > a.active::after {
            width: 70%;
        }
        .nav-editorial > li > a.active {
            color: var(--bronze-gold);
        }

        /* Buttons & Badges */
        .btn-bronze {
            background-color: var(--bronze-gold);
            color: var(--pure-white) !important;
            border: 1px solid var(--bronze-gold);
            padding: 12px 28px;
            border-radius: 2px;
            font-weight: 600;
            font-size: 0.95rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .btn-bronze:hover {
            background-color: var(--bronze-gold-hover);
            border-color: var(--bronze-gold-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(150, 125, 70, 0.25);
        }

        .btn-outline-carbon {
            background-color: transparent;
            color: var(--carbon-black) !important;
            border: 1px solid var(--carbon-black);
            padding: 12px 28px;
            border-radius: 2px;
            font-weight: 600;
            font-size: 0.95rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            transition: all 0.2s ease;
        }
        .btn-outline-carbon:hover {
            background-color: var(--carbon-black);
            color: var(--pure-white) !important;
            transform: translateY(-1px);
        }

        .card-editorial {
            background: var(--pure-white);
            border: 1px solid var(--precision-line);
            border-radius: 2px;
            box-shadow: var(--subtle-shadow);
            transition: all 0.25s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card-editorial:hover {
            border-color: var(--bronze-gold);
            box-shadow: var(--card-shadow-hover);
        }

        /* Section Layouts */
        .section-padding {
            padding: 72px 0;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-title {
            font-size: 2rem;
            position: relative;
            display: inline-block;
            margin-bottom: 14px;
        }
        .section-tag {
            font-size: 0.8125rem;
            text-transform: uppercase;
            color: var(--bronze-gold);
            letter-spacing: 0.15em;
            font-weight: 700;
            display: block;
            margin-bottom: 6px;
        }
        .section-desc {
            color: var(--lead-gray);
            max-width: 780px;
            margin: 0 auto;
            font-size: 1rem;
        }

        /* Hero Section */
        .hero-section {
            background: linear-gradient(180deg, #FFFFFF 0%, var(--paper-ivory) 100%);
            padding: 64px 0 76px;
            border-bottom: 1px solid var(--precision-line);
        }
        .hero-search-box {
            max-width: 680px;
            margin: 32px auto 20px;
            position: relative;
        }
        .hero-search-box input {
            width: 100%;
            padding: 16px 140px 16px 22px;
            border: 1px solid var(--precision-line);
            border-radius: 3px;
            font-size: 1rem;
            outline: none;
            background: var(--pure-white);
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
            transition: border-color 0.2s ease;
        }
        .hero-search-box input:focus {
            border-color: var(--bronze-gold);
        }
        .hero-search-box .btn-search {
            position: absolute;
            right: 6px;
            top: 6px;
            bottom: 6px;
            background: var(--carbon-black);
            color: #fff;
            border: none;
            padding: 0 24px;
            border-radius: 2px;
            font-weight: 600;
            transition: background-color 0.2s ease;
        }
        .hero-search-box .btn-search:hover {
            background: var(--bronze-gold);
        }

        .hero-tags {
            font-size: 0.875rem;
            color: var(--slate-gray);
        }
        .hero-tags a {
            color: var(--carbon-black);
            margin-left: 8px;
            padding: 3px 8px;
            background: #EDEFEB;
            border-radius: 2px;
            font-size: 0.8125rem;
        }
        .hero-tags a:hover {
            background: var(--bronze-gold);
            color: #fff;
        }

        /* Comparison Table Matrix */
        .matrix-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--pure-white);
            border: 1px solid var(--precision-line);
        }
        .matrix-table th, .matrix-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--precision-line);
            text-align: left;
        }
        .matrix-table th {
            background-color: var(--cool-slate);
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--carbon-black);
        }
        .matrix-table tr:last-child td {
            border-bottom: none;
        }
        .matrix-table .highlight-col {
            background-color: rgba(150, 125, 70, 0.05);
            font-weight: 600;
            color: var(--bronze-gold);
        }

        /* Accordion Customization */
        .accordion-item {
            background-color: var(--pure-white);
            border: 1px solid var(--precision-line);
            border-radius: 2px !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-button {
            background-color: var(--pure-white);
            color: var(--carbon-black);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 20px 24px;
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            color: var(--bronze-gold);
            background-color: var(--cool-slate);
        }
        .accordion-button::after {
            filter: grayscale(1);
        }
        .accordion-body {
            padding: 20px 24px;
            color: var(--lead-gray);
            line-height: 1.85;
            background-color: var(--pure-white);
        }

        /* Guarantee Bar (Dark) */
        .guarantee-bar {
            background-color: var(--carbon-black);
            color: var(--pure-white);
            padding: 56px 0;
        }
        .guarantee-item {
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 30px 20px;
            text-align: center;
            border-radius: 2px;
            background: rgba(255, 255, 255, 0.02);
            transition: border-color 0.2s;
        }
        .guarantee-item:hover {
            border-color: var(--bronze-gold);
        }
        .guarantee-item i {
            font-size: 2.2rem;
            color: var(--bronze-gold);
            margin-bottom: 16px;
            display: inline-block;
        }

        /* Sticky Bottom Bar */
        .sticky-conversion-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background-color: rgba(26, 29, 32, 0.96);
            backdrop-filter: blur(8px);
            border-top: 2px solid var(--bronze-gold);
            color: #fff;
            padding: 14px 0;
            z-index: 1040;
            box-shadow: 0 -4px 16px rgba(0,0,0,0.15);
        }

        /* Footer */
        .footer-editorial {
            background-color: #151719;
            color: var(--slate-gray);
            padding: 68px 0 96px;
            font-size: 0.9rem;
            border-top: 1px solid #23272B;
        }
        .footer-title {
            color: #fff;
            font-size: 1.15rem;
            margin-bottom: 20px;
            font-weight: 700;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--slate-gray);
        }
        .footer-links a:hover {
            color: var(--bronze-gold);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .masthead-title {
                font-size: 2.1rem;
                letter-spacing: 0.08em;
            }
            .section-padding {
                padding: 48px 0;
            }
        }
        @media (max-width: 576px) {
            .masthead-title {
                font-size: 1.6rem;
                letter-spacing: 0.02em;
            }
            .hero-search-box .btn-search {
                position: static;
                width: 100%;
                margin-top: 10px;
                padding: 12px;
            }
            .hero-search-box input {
                padding-right: 22px;
            }
        }

/* roulang page: category1 */
:root {
        --paper-ivory: #FBFBFA;
        --cool-slate: #F4F5F7;
        --carbon-black: #1A1D20;
        --lead-gray: #4A5056;
        --slate-gray: #767E86;
        --bronze-gold: #967D46;
        --bronze-gold-hover: #826a38;
        --crimson-brown: #80333A;
        --precision-line: #E2E4E8;
        --pure-white: #FFFFFF;
        --subtle-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        --card-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.08);
        --serif-font: -apple-system, "Noto Serif SC", "Source Han Serif SC", SimSun, "PingFang SC", serif;
        --sans-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    body {
        background-color: var(--paper-ivory);
        color: var(--carbon-black);
        font-family: var(--sans-font);
        font-size: 16px;
        line-height: 1.85;
        letter-spacing: 0.01em;
        margin: 0;
        padding: 0;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color 0.2s ease, border-color 0.2s ease;
    }
    a:hover {
        color: var(--bronze-gold);
    }
    .section-separator {
        border-top: 1px solid var(--precision-line);
    }
    /* Magazine Masthead Navigation */
    .top-info-bar {
        background-color: var(--pure-white);
        border-bottom: 3px double var(--precision-line);
        padding: 7px 0;
        font-size: 0.8125rem;
        color: var(--slate-gray);
    }
    .top-info-bar .badge-compliance {
        background-color: transparent;
        border: 1px solid var(--bronze-gold);
        color: var(--bronze-gold);
        font-weight: 500;
        padding: 2px 8px;
        border-radius: 2px;
        margin-right: 12px;
    }
    .masthead-core {
        padding: 28px 0 22px 0;
        background-color: var(--pure-white);
        text-align: center;
    }
    .masthead-title {
        font-size: 2.75rem;
        letter-spacing: 0.15em;
        margin: 0;
        color: var(--carbon-black);
        font-family: var(--serif-font);
        font-weight: 800;
    }
    .masthead-subtitle {
        font-size: 0.875rem;
        color: var(--slate-gray);
        letter-spacing: 0.25em;
        text-transform: uppercase;
        margin-top: 8px;
        font-weight: 500;
    }
    .masthead-nav-bar {
        border-top: 1px solid var(--precision-line);
        border-bottom: 1px solid var(--precision-line);
        background-color: var(--pure-white);
        position: sticky;
        top: 0;
        z-index: 1020;
    }
    .nav-editorial {
        display: flex;
        justify-content: center;
        align-items: center;
        list-style: none;
        margin: 0;
        padding: 0;
        flex-wrap: wrap;
    }
    .nav-editorial > li {
        position: relative;
    }
    .nav-editorial > li:not(:last-child)::after {
        content: "•";
        color: var(--precision-line);
        position: absolute;
        right: -3px;
        top: 50%;
        transform: translateY(-50%);
    }
    .nav-editorial > li > a {
        display: block;
        padding: 14px 28px;
        font-size: 0.95rem;
        font-weight: 600;
        color: var(--carbon-black);
        position: relative;
    }
    .nav-editorial > li > a::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 50%;
        width: 0;
        height: 2px;
        background-color: var(--bronze-gold);
        transition: all 0.25s ease;
        transform: translateX(-50%);
    }
    .nav-editorial > li > a:hover::after,
    .nav-editorial > li > a.active::after {
        width: 70%;
    }
    .nav-editorial > li > a.active {
        color: var(--bronze-gold);
    }
    /* Buttons & Badges */
    .btn-bronze {
        background-color: var(--bronze-gold);
        color: var(--pure-white) !important;
        border: 1px solid var(--bronze-gold);
        padding: 10px 24px;
        border-radius: 2px;
        font-weight: 600;
        font-size: 0.9rem;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .btn-bronze:hover {
        background-color: var(--bronze-gold-hover);
        border-color: var(--bronze-gold-hover);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(150, 125, 70, 0.25);
    }
    .btn-outline-carbon {
        background-color: transparent;
        color: var(--carbon-black) !important;
        border: 1px solid var(--carbon-black);
        padding: 10px 24px;
        border-radius: 2px;
        font-weight: 600;
        font-size: 0.9rem;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        transition: all 0.2s ease;
    }
    .btn-outline-carbon:hover {
        background-color: var(--carbon-black);
        color: var(--pure-white) !important;
        transform: translateY(-1px);
    }
    .card-editorial {
        background: var(--pure-white);
        border: 1px solid var(--precision-line);
        border-radius: 2px;
        box-shadow: var(--subtle-shadow);
        transition: all 0.25s ease;
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    .card-editorial:hover {
        border-color: var(--bronze-gold);
        box-shadow: var(--card-shadow-hover);
    }
    /* Category Header */
    .category-masthead {
        background-color: var(--cool-slate);
        border-bottom: 1px solid var(--precision-line);
        padding: 56px 0 44px 0;
    }
    .category-tag-badge {
        font-size: 0.8125rem;
        text-transform: uppercase;
        letter-spacing: 0.15em;
        color: var(--bronze-gold);
        font-weight: 700;
        margin-bottom: 12px;
        display: inline-block;
    }
    .category-h1 {
        font-family: var(--serif-font);
        font-size: 2.5rem;
        font-weight: 800;
        color: var(--carbon-black);
        line-height: 1.3;
        margin-bottom: 18px;
    }
    .category-lead {
        font-size: 1.05rem;
        color: var(--lead-gray);
        max-width: 900px;
        margin-bottom: 0;
    }
    /* Filter Toolbar */
    .filter-toolbar {
        background-color: var(--pure-white);
        border-bottom: 1px solid var(--precision-line);
        padding: 18px 0;
    }
    .filter-group {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 16px;
    }
    .filter-label {
        font-size: 0.875rem;
        color: var(--slate-gray);
        font-weight: 600;
    }
    .filter-item {
        font-size: 0.875rem;
        padding: 4px 12px;
        border: 1px solid var(--precision-line);
        border-radius: 2px;
        background: transparent;
        color: var(--carbon-black);
        cursor: pointer;
        transition: all 0.2s ease;
    }
    .filter-item.active, .filter-item:hover {
        border-color: var(--bronze-gold);
        color: var(--bronze-gold);
        background: rgba(150, 125, 70, 0.04);
    }
    /* Resource Grid */
    .media-card-thumb {
        position: relative;
        background-color: #111417;
        height: 190px;
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .media-card-thumb .thumb-watermark {
        color: rgba(255, 255, 255, 0.15);
        font-size: 3rem;
    }
    .media-badge-bitrate {
        position: absolute;
        top: 10px;
        left: 10px;
        background: rgba(26, 29, 32, 0.85);
        color: var(--pure-white);
        font-size: 0.75rem;
        padding: 2px 8px;
        border-radius: 2px;
        border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .media-badge-format {
        position: absolute;
        bottom: 10px;
        right: 10px;
        background: var(--bronze-gold);
        color: var(--pure-white);
        font-size: 0.75rem;
        padding: 2px 8px;
        border-radius: 2px;
        font-weight: 600;
    }
    .media-card-body {
        padding: 20px;
        flex-grow: 1;
        display: flex;
        flex-direction: column;
    }
    .media-card-title {
        font-size: 1.05rem;
        font-weight: 700;
        line-height: 1.45;
        margin-bottom: 10px;
        color: var(--carbon-black);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        min-height: 46px;
    }
    .media-spec-row {
        font-size: 0.8125rem;
        color: var(--slate-gray);
        margin-bottom: 6px;
        display: flex;
        justify-content: space-between;
    }
    .media-spec-row span.spec-val {
        color: var(--carbon-black);
        font-weight: 500;
    }
    /* Banner Feature */
    .spotlight-banner {
        background-color: #1A1D20;
        color: var(--pure-white);
        padding: 56px 0;
        border-top: 1px solid var(--precision-line);
        border-bottom: 1px solid var(--precision-line);
    }
    .spotlight-title {
        font-family: var(--serif-font);
        font-size: 1.95rem;
        font-weight: 700;
        color: var(--pure-white);
        margin-bottom: 16px;
    }
    .spotlight-desc {
        font-size: 0.95rem;
        color: #A6ACB3;
        line-height: 1.8;
    }
    /* Specification Article Section */
    .spec-doc-box {
        background: var(--pure-white);
        border: 1px solid var(--precision-line);
        padding: 36px;
        border-left: 4px solid var(--bronze-gold);
    }
    .spec-doc-title {
        font-family: var(--serif-font);
        font-size: 1.45rem;
        font-weight: 700;
        margin-bottom: 16px;
    }
    .spec-table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }
    .spec-table th, .spec-table td {
        padding: 12px 16px;
        border: 1px solid var(--precision-line);
        font-size: 0.875rem;
    }
    .spec-table th {
        background-color: var(--cool-slate);
        font-weight: 600;
        color: var(--carbon-black);
        width: 32%;
    }
    /* Tag Cloud Matrix */
    .tag-cloud-container {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }
    .tag-capsule {
        display: inline-block;
        padding: 6px 16px;
        border: 1px solid var(--precision-line);
        background: var(--pure-white);
        color: var(--lead-gray);
        font-size: 0.875rem;
        border-radius: 2px;
        transition: all 0.2s ease;
    }
    .tag-capsule:hover {
        border-color: var(--bronze-gold);
        color: var(--bronze-gold);
        background: #FDFBF7;
    }
    /* Custom Accordion */
    .accordion-editorial .accordion-item {
        background-color: var(--pure-white);
        border: 1px solid var(--precision-line);
        border-radius: 2px !important;
        margin-bottom: 14px;
        overflow: hidden;
    }
    .accordion-editorial .accordion-button {
        background-color: var(--pure-white);
        color: var(--carbon-black);
        font-weight: 700;
        font-size: 1rem;
        box-shadow: none;
        padding: 18px 24px;
    }
    .accordion-editorial .accordion-button:not(.collapsed) {
        color: var(--bronze-gold);
        background-color: rgba(150, 125, 70, 0.03);
        border-bottom: 1px solid var(--precision-line);
    }
    .accordion-editorial .accordion-body {
        padding: 20px 24px;
        color: var(--lead-gray);
        font-size: 0.95rem;
        line-height: 1.8;
    }
    /* Footer */
    .site-footer {
        background-color: #141618;
        color: #A0A5AA;
        padding: 64px 0 32px 0;
        font-size: 0.9rem;
    }
    .footer-logo {
        font-family: var(--serif-font);
        font-size: 1.6rem;
        color: var(--pure-white);
        font-weight: 800;
        letter-spacing: 0.08em;
    }
    .footer-title {
        color: var(--pure-white);
        font-size: 1.05rem;
        font-weight: 700;
        margin-bottom: 20px;
        position: relative;
        padding-bottom: 8px;
    }
    .footer-title::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 32px;
        height: 2px;
        background-color: var(--bronze-gold);
    }
    .footer-links {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .footer-links li {
        margin-bottom: 10px;
    }
    .footer-links a {
        color: #8C9298;
    }
    .footer-links a:hover {
        color: var(--bronze-gold);
    }
    @media (max-width: 768px) {
        .masthead-title {
            font-size: 1.95rem;
        }
        .category-h1 {
            font-size: 1.8rem;
        }
        .nav-editorial > li > a {
            padding: 10px 14px;
            font-size: 0.875rem;
        }
        .spec-doc-box {
            padding: 20px;
        }
    }

/* roulang page: category2 */
:root {
      --paper-ivory: #FBFBFA;
      --cool-slate: #F4F5F7;
      --carbon-black: #1A1D20;
      --lead-gray: #4A5056;
      --slate-gray: #767E86;
      --bronze-gold: #967D46;
      --bronze-gold-hover: #826a38;
      --crimson-brown: #80333A;
      --precision-line: #E2E4E8;
      --pure-white: #FFFFFF;
      --subtle-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
      --card-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.08);
      --serif-font: -apple-system, "Noto Serif SC", "Source Han Serif SC", SimSun, "PingFang SC", serif;
      --sans-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    body {
      background-color: var(--paper-ivory);
      color: var(--carbon-black);
      font-family: var(--sans-font);
      font-size: 16px;
      line-height: 1.8;
      letter-spacing: 0.01em;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease;
    }
    a:hover {
      color: var(--bronze-gold);
    }

    .section-separator {
      border-top: 1px solid var(--precision-line);
    }

    /* Magazine Masthead Navigation */
    .top-info-bar {
      background-color: var(--pure-white);
      border-bottom: 3px double var(--precision-line);
      padding: 7px 0;
      font-size: 0.8125rem;
      color: var(--slate-gray);
    }
    .top-info-bar .badge-compliance {
      background-color: transparent;
      border: 1px solid var(--bronze-gold);
      color: var(--bronze-gold);
      font-weight: 500;
      padding: 2px 8px;
      border-radius: 2px;
      margin-right: 12px;
    }
    .masthead-core {
      padding: 32px 0 24px;
      background-color: var(--pure-white);
      text-align: center;
    }
    .masthead-title {
      font-size: 2.75rem;
      letter-spacing: 0.15em;
      margin: 0;
      color: var(--carbon-black);
      font-family: var(--serif-font);
      font-weight: 800;
      line-height: 1.2;
    }
    .masthead-subtitle {
      font-size: 0.9375rem;
      color: var(--slate-gray);
      letter-spacing: 0.25em;
      text-transform: uppercase;
      margin-top: 8px;
      font-weight: 500;
    }
    .masthead-nav-bar {
      border-top: 1px solid var(--precision-line);
      border-bottom: 1px solid var(--precision-line);
      background-color: var(--pure-white);
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .nav-editorial {
      display: flex;
      justify-content: center;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
      flex-wrap: wrap;
    }
    .nav-editorial > li {
      position: relative;
    }
    .nav-editorial > li:not(:last-child)::after {
      content: "•";
      color: var(--precision-line);
      position: absolute;
      right: -3px;
      top: 50%;
      transform: translateY(-50%);
    }
    .nav-editorial > li > a {
      display: block;
      padding: 14px 28px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--carbon-black);
      position: relative;
    }
    .nav-editorial > li > a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background-color: var(--bronze-gold);
      transition: all 0.25s ease;
      transform: translateX(-50%);
    }
    .nav-editorial > li > a:hover::after,
    .nav-editorial > li > a.active::after {
      width: 70%;
    }
    .nav-editorial > li > a.active {
      color: var(--bronze-gold);
    }

    /* Common Components */
    .btn-bronze {
      background-color: var(--bronze-gold);
      color: var(--pure-white) !important;
      border: 1px solid var(--bronze-gold);
      padding: 10px 24px;
      border-radius: 2px;
      font-weight: 600;
      font-size: 0.9375rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .btn-bronze:hover {
      background-color: var(--bronze-gold-hover);
      border-color: var(--bronze-gold-hover);
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(150, 125, 70, 0.25);
    }
    .btn-outline-carbon {
      background-color: transparent;
      color: var(--carbon-black) !important;
      border: 1px solid var(--carbon-black);
      padding: 10px 24px;
      border-radius: 2px;
      font-weight: 600;
      font-size: 0.9375rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.2s ease;
    }
    .btn-outline-carbon:hover {
      background-color: var(--carbon-black);
      color: var(--pure-white) !important;
      transform: translateY(-1px);
    }

    .card-editorial {
      background: var(--pure-white);
      border: 1px solid var(--precision-line);
      border-radius: 2px;
      box-shadow: var(--subtle-shadow);
      transition: all 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card-editorial:hover {
      border-color: var(--bronze-gold);
      box-shadow: var(--card-shadow-hover);
    }

    .section-padding {
      padding: 64px 0;
    }
    .section-header {
      margin-bottom: 40px;
    }
    .section-title {
      font-size: 1.875rem;
      font-family: var(--serif-font);
      font-weight: 700;
      color: var(--carbon-black);
      margin-bottom: 12px;
      line-height: 1.3;
    }
    .section-subtitle {
      color: var(--slate-gray);
      font-size: 0.9375rem;
      margin: 0;
    }

    /* Category Specific Styles */
    .category-masthead-intro {
      background-color: var(--pure-white);
      border-bottom: 1px solid var(--precision-line);
      padding: 48px 0;
    }
    .editorial-h1 {
      font-family: var(--serif-font);
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--carbon-black);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .editorial-summary {
      font-size: 1.05rem;
      color: var(--lead-gray);
      max-width: 900px;
      margin: 0 auto;
      line-height: 1.85;
    }

    /* Filter Toolbar */
    .filter-panel {
      background-color: var(--pure-white);
      border: 1px solid var(--precision-line);
      border-radius: 2px;
      padding: 16px 24px;
      box-shadow: var(--subtle-shadow);
    }
    .filter-group-title {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--slate-gray);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-right: 12px;
    }
    .filter-item {
      font-size: 0.875rem;
      color: var(--carbon-black);
      padding: 4px 12px;
      border-radius: 2px;
      transition: all 0.2s;
      cursor: pointer;
      display: inline-block;
      text-decoration: none;
    }
    .filter-item:hover, .filter-item.active {
      background-color: var(--cool-slate);
      color: var(--bronze-gold);
      font-weight: 600;
    }

    /* Resource Matrix Card */
    .catalog-cover-mock {
      height: 200px;
      background-color: #24292E;
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 16px;
      background-size: cover;
      background-position: center;
    }
    .catalog-cover-overlay {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(180deg, rgba(26,29,32,0.2) 0%, rgba(26,29,32,0.85) 100%);
    }
    .catalog-badge-pos {
      position: absolute;
      top: 12px;
      left: 12px;
      z-index: 2;
    }
    .badge-master-tag {
      background-color: rgba(26, 29, 32, 0.85);
      border: 1px solid rgba(150, 125, 70, 0.6);
      color: #E8D39E;
      font-size: 0.75rem;
      padding: 2px 8px;
      font-family: monospace;
      letter-spacing: 0.05em;
    }
    .catalog-content-box {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .catalog-title {
      font-family: var(--serif-font);
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--carbon-black);
      line-height: 1.5;
      margin-bottom: 10px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      min-height: 3.375rem;
    }
    .catalog-meta-specs {
      font-size: 0.8125rem;
      color: var(--slate-gray);
      margin-bottom: 16px;
      border-top: 1px dashed var(--precision-line);
      padding-top: 10px;
    }
    .catalog-spec-item {
      display: flex;
      justify-content: space-between;
      margin-bottom: 4px;
    }

    /* Spotlight Banner */
    .spotlight-banner {
      background-color: #1A1D20;
      color: var(--pure-white);
      border-radius: 2px;
      border-left: 4px solid var(--bronze-gold);
      padding: 48px;
      position: relative;
    }
    .spotlight-tag {
      color: #E8D39E;
      font-size: 0.8125rem;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      font-weight: 600;
    }

    /* Knowledge Guide Box */
    .guide-paper {
      background-color: var(--pure-white);
      border: 1px solid var(--precision-line);
      padding: 36px;
      border-radius: 2px;
    }
    .guide-step-num {
      font-family: var(--serif-font);
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--bronze-gold);
      line-height: 1;
      margin-bottom: 8px;
    }

    /* Tag Cloud */
    .tag-cloud-item {
      display: inline-block;
      border: 1px solid var(--precision-line);
      background-color: var(--pure-white);
      padding: 6px 16px;
      margin: 4px;
      font-size: 0.875rem;
      color: var(--lead-gray);
      border-radius: 2px;
      transition: all 0.2s;
    }
    .tag-cloud-item:hover {
      border-color: var(--bronze-gold);
      color: var(--bronze-gold);
      background-color: #FAF8F5;
    }

    /* Accordion Redefined */
    .accordion-editorial .accordion-item {
      border: 1px solid var(--precision-line);
      margin-bottom: 12px;
      background-color: var(--pure-white);
      border-radius: 2px !important;
      overflow: hidden;
    }
    .accordion-editorial .accordion-button {
      font-family: var(--serif-font);
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--carbon-black);
      background-color: var(--pure-white);
      padding: 18px 24px;
      box-shadow: none !important;
    }
    .accordion-editorial .accordion-button:not(.collapsed) {
      color: var(--bronze-gold);
      background-color: #FAF9F6;
      border-bottom: 1px solid var(--precision-line);
    }
    .accordion-editorial .accordion-button::after {
      filter: grayscale(1);
    }
    .accordion-editorial .accordion-body {
      padding: 20px 24px;
      font-size: 0.9375rem;
      color: var(--lead-gray);
      line-height: 1.8;
    }

    /* Footer Shared */
    .site-footer {
      background-color: #151719;
      color: #9DA3AA;
      padding: 72px 0 32px;
      border-top: 2px solid var(--bronze-gold);
      font-size: 0.875rem;
    }
    .footer-logo {
      font-family: var(--serif-font);
      font-size: 1.625rem;
      color: var(--pure-white);
      font-weight: 700;
      letter-spacing: 0.08em;
    }
    .footer-title {
      color: var(--pure-white);
      font-size: 0.9375rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      margin-bottom: 20px;
      position: relative;
      padding-bottom: 8px;
    }
    .footer-title::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 1px;
      background-color: var(--bronze-gold);
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #8C939B;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #D3B77B;
    }

    @media (max-width: 768px) {
      .masthead-title {
        font-size: 1.875rem;
        letter-spacing: 0.05em;
      }
      .editorial-h1 {
        font-size: 1.625rem;
      }
      .nav-editorial > li > a {
        padding: 10px 14px;
        font-size: 0.875rem;
      }
      .spotlight-banner {
        padding: 28px 20px;
      }
      .guide-paper {
        padding: 24px 18px;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}