/* Original tool presentation, scoped to this detail page. */

        #yk-portal-v2 .yk-legacy-tool {
            --primary: #0b6e75;
            --primary-light: #0e8f85;
            --primary-dark: #123a44;
            --accent: #d89a2b;
            --success: #27835d;
            --danger: #c4513f;
            --blue: #2e6f9e;
            --ink: #162334;
            --body-text: #405063;
            --muted: #687789;
            --line: #dce4e7;
            --soft: #edf6f4;
            --paper: #f6f8f9;
            --nav-bg-color: rgba(18, 35, 52, 0.94);
            --shadow-sm: 0 3px 14px rgba(22, 35, 52, 0.07);
            --shadow-md: 0 12px 34px rgba(22, 35, 52, 0.11);
        }

        #yk-portal-v2 .yk-legacy-tool * { box-sizing: border-box; }

        #yk-portal-v2 .yk-legacy-tool { scroll-behavior: smooth; }

        #yk-portal-v2 .yk-legacy-tool {
            padding-top: 60px;
            margin: 0;
            color: var(--body-text);
            background: #fff;
            font-family: 'Nunito', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.75;
        }

        /* ===== Navbar: shared site navigation ===== */
        #yk-portal-v2 .yk-legacy-tool .navbar {
            background-color: var(--nav-bg-color);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            padding: 10px 0;
            transition: all 0.4s ease;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        }
        #yk-portal-v2 .yk-legacy-tool .navbar-scrolled { padding: 8px 0; background-color: rgba(13,25,49,0.97); box-shadow: 0 5px 20px rgba(0,0,0,0.2); }
        #yk-portal-v2 .yk-legacy-tool .navbar-brand { display: flex; align-items: center; padding: 0; }
        #yk-portal-v2 .yk-legacy-tool .navbar-brand img { height: 40px; transition: all 0.3s ease; margin-right: 10px; }
        #yk-portal-v2 .yk-legacy-tool .navbar-scrolled .navbar-brand img { height: 36px; }
        #yk-portal-v2 .yk-legacy-tool .brand-text { color: rgba(255,255,255,0.95); font-weight: 700; font-size: 1.5rem; transition: all 0.3s ease; text-shadow: 0 2px 10px rgba(0,0,0,0.2); }
        #yk-portal-v2 .yk-legacy-tool .navbar-scrolled .brand-text { font-size: 1.3rem; }
        #yk-portal-v2 .yk-legacy-tool .nav-item { position: relative; margin: 0 5px; }
        #yk-portal-v2 .yk-legacy-tool .nav-link { font-weight: 600; position: relative; padding: 10px 0 !important; margin: 0 15px; text-transform: uppercase; font-size: 14px; letter-spacing: 1px; transition: all 0.3s ease; color: rgba(255,255,255,0.9) !important; }
        #yk-portal-v2 .yk-legacy-tool .nav-link:before { content: ""; position: absolute; width: 5px; height: 5px; border-radius: 50%; bottom: 0; left: 50%; background-color: #37c4b6; transform: translateX(-50%) scale(0); transition: transform 0.3s ease; }
        #yk-portal-v2 .yk-legacy-tool .nav-link:hover:before,#yk-portal-v2 .yk-legacy-tool  .nav-item.active .nav-link:before { transform: translateX(-50%) scale(1); }
        #yk-portal-v2 .yk-legacy-tool .nav-item.active .nav-link { color: #66d6ca !important; }
        #yk-portal-v2 .yk-legacy-tool .nav-item:hover .nav-link { color: #fff !important; transform: translateY(-3px); }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler { border: none; outline: none; padding: 0; }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon { background-image: none; position: relative; width: 24px; height: 17px; }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon:before,#yk-portal-v2 .yk-legacy-tool  .navbar-dark .navbar-toggler-icon:after,#yk-portal-v2 .yk-legacy-tool  .navbar-dark .navbar-toggler-icon span { width: 100%; height: 2px; background-color: #fff; border-radius: 3px; position: absolute; left: 0; transition: all .3s ease; }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon:before,#yk-portal-v2 .yk-legacy-tool  .navbar-dark .navbar-toggler-icon:after { content: ''; }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon:before { top: 0; }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon span { top: 50%; transform: translateY(-50%); }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon:after { bottom: 0; }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon:before { transform: translateY(7px) rotate(45deg); }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon:after { transform: translateY(-7px) rotate(-45deg); }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon span { opacity: 0; }

        /* ===== Product page ===== */
        #yk-portal-v2 .yk-legacy-tool .product-page .hero {
            height: auto !important;
            min-height: auto !important;
            padding: 4.5rem 0 4rem;
            color: #fff;
            text-align: center;
            background: #123a44 !important;
            position: relative;
            overflow: hidden;
        }
        #yk-portal-v2 .yk-legacy-tool .product-page .hero::before,#yk-portal-v2 .yk-legacy-tool 
        .product-page .hero::after { display: none !important; }
        #yk-portal-v2 .yk-legacy-tool .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 10px;
            margin-bottom: 1rem;
            color: #bcebe5;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.18);
            border-radius: 4px;
            font-size: 0.84rem;
            font-weight: 700;
        }
        #yk-portal-v2 .yk-legacy-tool .product-page .hero h1 {
            max-width: 900px;
            margin: 0 auto 1rem;
            color: #fff;
            font-size: 2.55rem;
            font-weight: 800;
            line-height: 1.28;
            letter-spacing: 0;
        }
        #yk-portal-v2 .yk-legacy-tool .product-page .hero .subtitle {
            max-width: 780px;
            margin: 0 auto;
            color: #d9e9e8;
            font-size: 1.08rem;
            line-height: 1.85;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-warning {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            max-width: 780px;
            margin: 1.25rem auto 0;
            padding: 11px 14px;
            color: #fff4d6;
            background: rgba(216, 154, 43, 0.16);
            border: 1px solid rgba(244, 184, 77, 0.55);
            border-radius: 6px;
            font-size: .93rem;
            line-height: 1.7;
            text-align: left;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-warning i { margin-top: 5px; color: #f4b84d; flex-shrink: 0; }
        #yk-portal-v2 .yk-legacy-tool .hero-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 1.8rem;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 11px 22px;
            border: 1px solid transparent;
            border-radius: 6px;
            font-weight: 700;
            text-decoration: none;
            transition: transform .2s ease, background .2s ease, border-color .2s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-btn.primary { color: #17343a; background: #f1b54c; }
        #yk-portal-v2 .yk-legacy-tool .hero-btn.secondary { color: #fff; background: transparent; border-color: rgba(255,255,255,.45); }
        #yk-portal-v2 .yk-legacy-tool .hero-btn:hover { transform: translateY(-2px); text-decoration: none; }
        #yk-portal-v2 .yk-legacy-tool .hero-btn.primary:hover { color: #17343a; background: #ffc765; }
        #yk-portal-v2 .yk-legacy-tool .hero-btn.secondary:hover { color: #fff; border-color: #fff; background: rgba(255,255,255,.08); }
        #yk-portal-v2 .yk-legacy-tool .hero-facts {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 1.6rem;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-fact {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 5px 9px;
            color: #d9e9e8;
            border: 1px solid rgba(255,255,255,.16);
            border-radius: 4px;
            font-size: .86rem;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-fact i { color: #6fd3c6; }

        #yk-portal-v2 .yk-legacy-tool .section { padding: 4.5rem 0; }
        #yk-portal-v2 .yk-legacy-tool .section.alt { background: var(--paper); }
        #yk-portal-v2 .yk-legacy-tool .section-heading {
            max-width: 760px;
            margin: 0 auto 2.7rem;
            text-align: center;
        }
        #yk-portal-v2 .yk-legacy-tool .section-eyebrow {
            display: block;
            margin-bottom: .45rem;
            color: var(--primary);
            font-size: .84rem;
            font-weight: 800;
        }
        #yk-portal-v2 .yk-legacy-tool .section-heading h2 {
            margin: 0;
            color: var(--ink);
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.4;
            letter-spacing: 0;
        }
        #yk-portal-v2 .yk-legacy-tool .section-heading h2::after { display: none; }
        #yk-portal-v2 .yk-legacy-tool .section-heading p {
            margin: .8rem auto 0;
            color: var(--muted);
            font-size: 1rem;
        }

        #yk-portal-v2 .yk-legacy-tool .pain-copy h3 {
            margin: 0 0 1rem;
            color: var(--ink);
            font-size: 1.55rem;
            font-weight: 800;
            line-height: 1.5;
            letter-spacing: 0;
        }
        #yk-portal-v2 .yk-legacy-tool .pain-copy > p { margin-bottom: 1.4rem; }
        #yk-portal-v2 .yk-legacy-tool .pain-list { margin: 0; padding: 0; list-style: none; }
        #yk-portal-v2 .yk-legacy-tool .pain-list li {
            display: grid;
            grid-template-columns: 34px 1fr;
            gap: 12px;
            padding: 12px 0;
            border-top: 1px solid var(--line);
        }
        #yk-portal-v2 .yk-legacy-tool .pain-list i {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            margin-top: 2px;
            color: #fff;
            background: var(--danger);
            border-radius: 6px;
            font-size: .78rem;
        }
        #yk-portal-v2 .yk-legacy-tool .pain-list strong { display: block; margin-bottom: 2px; color: var(--ink); }
        #yk-portal-v2 .yk-legacy-tool .pain-list span { color: var(--muted); font-size: .94rem; }
        #yk-portal-v2 .yk-legacy-tool .screenshot-figure { margin: 0; }
        #yk-portal-v2 .yk-legacy-tool .screenshot-frame {
            padding: 8px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 8px;
            box-shadow: var(--shadow-md);
        }
        #yk-portal-v2 .yk-legacy-tool .screenshot-frame img {
            display: block;
            width: 100%;
            height: auto;
            aspect-ratio: 1962 / 1406;
            object-fit: contain;
            border-radius: 4px;
        }
        #yk-portal-v2 .yk-legacy-tool .screenshot-figure figcaption {
            margin-top: 10px;
            color: var(--muted);
            font-size: .84rem;
            text-align: center;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 18px;
        }
        #yk-portal-v2 .yk-legacy-tool .feature-card {
            height: 100%;
            padding: 1.55rem;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 8px;
            box-shadow: var(--shadow-sm);
            transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .feature-card:hover { transform: translateY(-4px); border-color: #abc9c6; box-shadow: var(--shadow-md); }
        #yk-portal-v2 .yk-legacy-tool .feature-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            margin-bottom: 1rem;
            color: #fff;
            border-radius: 7px;
            font-size: 1.12rem;
        }
        #yk-portal-v2 .yk-legacy-tool .product-page .feature-icon i { color: #fff !important; }
        #yk-portal-v2 .yk-legacy-tool .icon-teal { background: var(--primary); }
        #yk-portal-v2 .yk-legacy-tool .icon-green { background: var(--success); }
        #yk-portal-v2 .yk-legacy-tool .icon-amber { background: var(--accent); }
        #yk-portal-v2 .yk-legacy-tool .icon-red { background: var(--danger); }
        #yk-portal-v2 .yk-legacy-tool .icon-blue { background: var(--blue); }
        #yk-portal-v2 .yk-legacy-tool .icon-ink { background: #415268; }
        #yk-portal-v2 .yk-legacy-tool .feature-card h3 { margin: 0 0 .55rem; color: var(--ink); font-size: 1.06rem; font-weight: 800; letter-spacing: 0; }
        #yk-portal-v2 .yk-legacy-tool .feature-card p { margin: 0; color: var(--muted); font-size: .93rem; }

        #yk-portal-v2 .yk-legacy-tool .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 16px;
        }
        #yk-portal-v2 .yk-legacy-tool .scenario-card {
            height: 100%;
            padding: 1.45rem;
            background: #fff;
            border-top: 3px solid var(--primary);
            border-right: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
            border-left: 1px solid var(--line);
            border-radius: 6px;
        }
        #yk-portal-v2 .yk-legacy-tool .scenario-card:nth-child(2) { border-top-color: var(--accent); }
        #yk-portal-v2 .yk-legacy-tool .scenario-card:nth-child(3) { border-top-color: var(--blue); }
        #yk-portal-v2 .yk-legacy-tool .scenario-card:nth-child(4) { border-top-color: var(--danger); }
        #yk-portal-v2 .yk-legacy-tool .scenario-card i { margin-bottom: .85rem; color: var(--primary); font-size: 1.35rem; }
        #yk-portal-v2 .yk-legacy-tool .scenario-card:nth-child(2) i { color: var(--accent); }
        #yk-portal-v2 .yk-legacy-tool .scenario-card:nth-child(3) i { color: var(--blue); }
        #yk-portal-v2 .yk-legacy-tool .scenario-card:nth-child(4) i { color: var(--danger); }
        #yk-portal-v2 .yk-legacy-tool .scenario-card h3 { margin: 0 0 .5rem; color: var(--ink); font-size: 1.02rem; font-weight: 800; letter-spacing: 0; }
        #yk-portal-v2 .yk-legacy-tool .scenario-card p { margin: 0; color: var(--muted); font-size: .91rem; }
        #yk-portal-v2 .yk-legacy-tool .authorization-note {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            max-width: 850px;
            margin: 1.5rem auto 0;
            padding: 13px 15px;
            color: #6a4a13;
            background: #fff8e8;
            border: 1px solid #edd49d;
            border-radius: 6px;
            font-size: .91rem;
        }
        #yk-portal-v2 .yk-legacy-tool .authorization-note i { margin-top: 4px; color: var(--accent); }

        #yk-portal-v2 .yk-legacy-tool .guide-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(330px, .8fr);
            gap: 42px;
            align-items: start;
        }
        #yk-portal-v2 .yk-legacy-tool .steps { margin: 0; padding: 0; list-style: none; counter-reset: step; }
        #yk-portal-v2 .yk-legacy-tool .steps li {
            position: relative;
            display: grid;
            grid-template-columns: 44px 1fr;
            gap: 14px;
            padding-bottom: 1.35rem;
            counter-increment: step;
        }
        #yk-portal-v2 .yk-legacy-tool .steps li:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 42px;
            bottom: 2px;
            left: 21px;
            width: 2px;
            background: var(--line);
        }
        #yk-portal-v2 .yk-legacy-tool .steps li::before {
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            color: #fff;
            background: var(--primary);
            border: 4px solid var(--soft);
            border-radius: 50%;
            font-weight: 800;
            z-index: 1;
        }
        #yk-portal-v2 .yk-legacy-tool .steps h3 { margin: 2px 0 .3rem; color: var(--ink); font-size: 1.02rem; font-weight: 800; letter-spacing: 0; }
        #yk-portal-v2 .yk-legacy-tool .steps p { margin: 0; color: var(--muted); font-size: .93rem; }
        #yk-portal-v2 .yk-legacy-tool .mode-panel {
            position: sticky;
            top: 92px;
            padding: 1.4rem;
            background: var(--soft);
            border: 1px solid #cfe1dd;
            border-radius: 8px;
        }
        #yk-portal-v2 .yk-legacy-tool .mode-panel h3 { margin: 0 0 1rem; color: var(--ink); font-size: 1.08rem; font-weight: 800; letter-spacing: 0; }
        #yk-portal-v2 .yk-legacy-tool .mode-row {
            display: grid;
            grid-template-columns: minmax(110px, .75fr) minmax(0, 1.25fr);
            gap: 12px;
            padding: 11px 0;
            border-top: 1px solid #cfe1dd;
            font-size: .89rem;
        }
        #yk-portal-v2 .yk-legacy-tool .mode-row strong { color: var(--ink); }
        #yk-portal-v2 .yk-legacy-tool .mode-row span { color: var(--muted); }
        #yk-portal-v2 .yk-legacy-tool .mode-tip { margin: .9rem 0 0; color: #5f6f78; font-size: .86rem; }

        #yk-portal-v2 .yk-legacy-tool .faq-list { max-width: 900px; margin: 0 auto; }
        #yk-portal-v2 .yk-legacy-tool .faq-item {
            margin-bottom: 12px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 7px;
            box-shadow: 0 2px 8px rgba(22,35,52,.04);
            overflow: hidden;
        }
        #yk-portal-v2 .yk-legacy-tool .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 1rem 1.2rem;
            color: var(--ink);
            cursor: pointer;
            font-weight: 800;
            list-style: none;
        }
        #yk-portal-v2 .yk-legacy-tool .faq-item summary::-webkit-details-marker { display: none; }
        #yk-portal-v2 .yk-legacy-tool .faq-item summary::after {
            content: '\f078';
            color: var(--primary);
            font-family: 'Font Awesome 5 Free';
            font-size: .82rem;
            font-weight: 900;
            transition: transform .2s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .faq-item[open] summary { background: var(--soft); }
        #yk-portal-v2 .yk-legacy-tool .faq-item[open] summary::after { transform: rotate(180deg); }
        #yk-portal-v2 .yk-legacy-tool .faq-answer { padding: 0 1.2rem 1.15rem; color: var(--muted); font-size: .94rem; }
        #yk-portal-v2 .yk-legacy-tool .faq-answer p { margin: .9rem 0 0; }

        #yk-portal-v2 .yk-legacy-tool .download-section {
            padding: 4.5rem 0;
            color: #fff;
            text-align: center;
            background: #174f56;
        }
        #yk-portal-v2 .yk-legacy-tool .download-section h2 { margin: 0 0 .75rem; color: #fff; font-size: 2rem; font-weight: 800; letter-spacing: 0; }
        #yk-portal-v2 .yk-legacy-tool .download-section p { max-width: 700px; margin: 0 auto 1.7rem; color: #d7e9e7; }
        #yk-portal-v2 .yk-legacy-tool .download-buttons { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }
        #yk-portal-v2 .yk-legacy-tool .download-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 50px;
            padding: 12px 24px;
            color: #18373c;
            background: #f4b84d;
            border: 1px solid #f4b84d;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 800;
            text-decoration: none;
            transition: transform .2s ease, background .2s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .download-btn.backup { color: #fff; background: transparent; border-color: rgba(255,255,255,.55); }
        #yk-portal-v2 .yk-legacy-tool .download-btn:hover { transform: translateY(-2px); color: #18373c; background: #ffc966; text-decoration: none; }
        #yk-portal-v2 .yk-legacy-tool .download-btn.backup:hover { color: #fff; background: rgba(255,255,255,.09); }
        #yk-portal-v2 .yk-legacy-tool .system-note {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 1.3rem;
            color: #d7e9e7;
            font-size: .88rem;
        }
        #yk-portal-v2 .yk-legacy-tool .system-note span { display: inline-flex; align-items: center; gap: 7px; }
        #yk-portal-v2 .yk-legacy-tool .system-note i { color: #79d3c9; }

        @media (max-width: 991px) {
            #yk-portal-v2 .yk-legacy-tool .navbar-collapse { background-color: rgba(13,25,49,0.98); padding: 20px; border-radius: 10px; margin-top: 15px; box-shadow: 0 10px 30px rgba(0,0,0,0.15); }
            #yk-portal-v2 .yk-legacy-tool .navbar-nav .nav-item { margin: 5px 0; }
            #yk-portal-v2 .yk-legacy-tool .navbar-brand img { height: 36px; }
            #yk-portal-v2 .yk-legacy-tool .brand-text { font-size: 1.3rem; }
            #yk-portal-v2 .yk-legacy-tool .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
            #yk-portal-v2 .yk-legacy-tool .scenario-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
            #yk-portal-v2 .yk-legacy-tool .guide-layout { grid-template-columns: 1fr; gap: 24px; }
            #yk-portal-v2 .yk-legacy-tool .mode-panel { position: static; }
        }

        @media (max-width: 767px) {
            #yk-portal-v2 .yk-legacy-tool { padding-top: 56px; }
            #yk-portal-v2 .yk-legacy-tool .product-page .hero { padding: 3.3rem 0 3rem; }
            #yk-portal-v2 .yk-legacy-tool .product-page .hero h1 { font-size: 2rem; }
            #yk-portal-v2 .yk-legacy-tool .product-page .hero .subtitle { font-size: 1rem; }
            #yk-portal-v2 .yk-legacy-tool .section { padding: 3.5rem 0; }
            #yk-portal-v2 .yk-legacy-tool .section-heading { margin-bottom: 2rem; }
            #yk-portal-v2 .yk-legacy-tool .section-heading h2 { font-size: 1.65rem; }
            #yk-portal-v2 .yk-legacy-tool .pain-copy { margin-bottom: 2rem; }
            #yk-portal-v2 .yk-legacy-tool .feature-grid { grid-template-columns: 1fr; }
            #yk-portal-v2 .yk-legacy-tool .scenario-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 575px) {
            #yk-portal-v2 .yk-legacy-tool .navbar-brand img { height: 32px; }
            #yk-portal-v2 .yk-legacy-tool .brand-text { font-size: 1.2rem; }
            #yk-portal-v2 .yk-legacy-tool .product-page .hero h1 { font-size: 1.65rem; }
            #yk-portal-v2 .yk-legacy-tool .hero-actions { align-items: stretch; flex-direction: column; }
            #yk-portal-v2 .yk-legacy-tool .hero-btn { width: 100%; }
            #yk-portal-v2 .yk-legacy-tool .feature-card,#yk-portal-v2 .yk-legacy-tool  .scenario-card { padding: 1.25rem; }
            #yk-portal-v2 .yk-legacy-tool .mode-row { grid-template-columns: 1fr; gap: 3px; }
            #yk-portal-v2 .yk-legacy-tool .faq-item summary { align-items: flex-start; padding: .95rem 1rem; font-size: .94rem; }
            #yk-portal-v2 .yk-legacy-tool .faq-answer { padding: 0 1rem 1rem; }
            #yk-portal-v2 .yk-legacy-tool .download-section h2 { font-size: 1.65rem; }
            #yk-portal-v2 .yk-legacy-tool .download-buttons { align-items: stretch; flex-direction: column; }
            #yk-portal-v2 .yk-legacy-tool .download-btn { width: 100%; }
        }

        @media (prefers-reduced-motion: reduce) {
            #yk-portal-v2 .yk-legacy-tool { scroll-behavior: auto; }
            #yk-portal-v2 .yk-legacy-tool *,#yk-portal-v2 .yk-legacy-tool  *::before,#yk-portal-v2 .yk-legacy-tool  *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
        }