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

        #yk-portal-v2 .yk-legacy-tool {
            --ink: #102a33;
            --body: #36545b;
            --muted: #678087;
            --line: #dbe6e8;
            --paper: #ffffff;
            --soft: #f3f8f7;
            --teal: #087f75;
            --teal-dark: #075e59;
            --coral: #df5a47;
            --gold: #d99a20;
            --nav-bg-color: rgba(10, 35, 42, 0.94);
            --shadow-sm: 0 4px 14px rgba(16, 42, 51, 0.08);
            --shadow-lg: 0 18px 45px rgba(16, 42, 51, 0.16);
        }

        #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);
            background: var(--paper);
            font-family: 'Nunito', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.75;
        }

        #yk-portal-v2 .yk-legacy-tool a { color: var(--teal); }
        #yk-portal-v2 .yk-legacy-tool a:hover { color: var(--teal-dark); }

        #yk-portal-v2 .yk-legacy-tool .skip-link {
            position: fixed;
            top: -60px;
            left: 16px;
            z-index: 1100;
            padding: 10px 16px;
            color: #fff;
            background: var(--ink);
            border-radius: 4px;
        }
        #yk-portal-v2 .yk-legacy-tool .skip-link:focus { top: 10px; color: #fff; }

        /* ===== Navbar ===== */
        #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(10,35,42,0.98); 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: 0; 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: #4dd4c5; 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: #7ce8dc !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; }

        /* ===== Hero ===== */
        #yk-portal-v2 .yk-legacy-tool .hero {
            height: auto !important;
            min-height: auto !important;
            position: relative;
            display: flex;
            align-items: center;
            padding: 88px 0 82px;
            color: #fff;
            background-color: #0b343b;
            text-align: left;
            overflow: hidden;
        }
        #yk-portal-v2 .yk-legacy-tool .hero::before {
            content: '';
            position: absolute;
            width: 440px;
            height: 260px;
            right: -150px;
            bottom: -110px;
            border: 1px solid rgba(124, 232, 220, 0.22);
            transform: rotate(18deg);
        }
        #yk-portal-v2 .yk-legacy-tool .hero::after {
            content: '';
            position: absolute;
            width: 380px;
            height: 210px;
            left: -150px;
            top: -100px;
            border: 1px solid rgba(244, 183, 64, 0.2);
            transform: rotate(-14deg);
        }
        #yk-portal-v2 .yk-legacy-tool .hero .container { position: relative; z-index: 1; }
        #yk-portal-v2 .yk-legacy-tool .hero-content { max-width: 780px; }
        #yk-portal-v2 .yk-legacy-tool .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            color: #a8f3e9;
            font-size: 0.9rem;
            font-weight: 700;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-kicker i { color: #ffd06b; }
        #yk-portal-v2 .yk-legacy-tool .hero h1 {
            margin: 0 0 18px;
            max-width: 760px;
            color: #fff;
            font-size: 2.75rem;
            line-height: 1.22;
            font-weight: 800;
            letter-spacing: 0;
        }
        #yk-portal-v2 .yk-legacy-tool .hero .subtitle {
            max-width: 720px;
            margin: 0;
            color: rgba(255,255,255,0.88);
            font-size: 1.08rem;
            line-height: 1.85;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
        #yk-portal-v2 .yk-legacy-tool .hero-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 11px 22px;
            border: 1px solid transparent;
            border-radius: 6px;
            font-weight: 700;
            text-decoration: none;
            transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-button:hover { transform: translateY(-2px); text-decoration: none; }
        #yk-portal-v2 .yk-legacy-tool .hero-button i { margin-right: 8px; }
        #yk-portal-v2 .yk-legacy-tool .hero-button.primary { background: #f4b740; color: #182e33; }
        #yk-portal-v2 .yk-legacy-tool .hero-button.primary:hover { background: #ffd06b; color: #182e33; }
        #yk-portal-v2 .yk-legacy-tool .hero-button.secondary { border-color: rgba(255,255,255,0.52); color: #fff; background: rgba(255,255,255,0.08); }
        #yk-portal-v2 .yk-legacy-tool .hero-button.secondary:hover { border-color: #fff; color: #fff; background: rgba(255,255,255,0.14); }
        #yk-portal-v2 .yk-legacy-tool .hero-facts { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 30px; padding: 0; list-style: none; }
        #yk-portal-v2 .yk-legacy-tool .hero-facts li { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.82); font-size: 0.9rem; }
        #yk-portal-v2 .yk-legacy-tool .hero-facts i { color: #76ded2; }

        /* ===== Common ===== */
        #yk-portal-v2 .yk-legacy-tool .content-section { padding: 78px 0; }
        #yk-portal-v2 .yk-legacy-tool .section-alt { background: var(--soft); }
        #yk-portal-v2 .yk-legacy-tool .section-heading { max-width: 720px; margin: 0 auto 42px; text-align: center; }
        #yk-portal-v2 .yk-legacy-tool .eyebrow { margin: 0 0 8px; color: var(--teal); font-size: 0.82rem; font-weight: 800; text-transform: uppercase; }
        #yk-portal-v2 .yk-legacy-tool .section-heading h2 { margin: 0 0 12px; color: var(--ink); font-size: 2rem; font-weight: 800; line-height: 1.3; letter-spacing: 0; }
        #yk-portal-v2 .yk-legacy-tool .section-heading p { margin: 0; color: var(--muted); }
        #yk-portal-v2 .yk-legacy-tool .section-rule { width: 46px; height: 3px; margin: 16px auto 0; background: var(--coral); }
        #yk-portal-v2 .yk-legacy-tool .row-equal > [class*="col-"] { display: flex; }

        /* ===== Pain ===== */
        #yk-portal-v2 .yk-legacy-tool .pain-item {
            width: 100%;
            padding: 28px;
            border-top: 4px solid var(--coral);
            border-radius: 6px;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }
        #yk-portal-v2 .yk-legacy-tool .pain-item:nth-child(2) { border-top-color: var(--gold); }
        #yk-portal-v2 .yk-legacy-tool .pain-icon,#yk-portal-v2 .yk-legacy-tool  .feature-icon,#yk-portal-v2 .yk-legacy-tool  .scenario-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            flex: 0 0 48px;
            border-radius: 6px;
        }
        #yk-portal-v2 .yk-legacy-tool .feature-icon {
            width: 54px;
            height: 54px;
            flex-basis: 54px;
            margin-bottom: 18px;
            border: 1px solid #b8ddd8;
            border-radius: 50%;
            color: var(--teal-dark);
            background: #e7f5f2;
            font-size: 1.2rem;
            line-height: 1;
        }
        #yk-portal-v2 .yk-legacy-tool .feature-icon i { color: inherit; font-size: 1.2rem; }
        #yk-portal-v2 .yk-legacy-tool .pain-icon { margin-bottom: 18px; color: #fff; background: var(--coral); }
        #yk-portal-v2 .yk-legacy-tool .pain-item h3 { margin: 0 0 10px; color: var(--ink); font-size: 1.08rem; font-weight: 800; }
        #yk-portal-v2 .yk-legacy-tool .pain-item p { margin: 0; color: var(--muted); font-size: 0.95rem; }

        /* ===== Features ===== */
        #yk-portal-v2 .yk-legacy-tool .feature-item {
            width: 100%;
            padding: 26px;
            border: 1px solid var(--line);
            border-radius: 6px;
            background: #fff;
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .feature-item:hover { transform: translateY(-4px); border-color: #a7ceca; box-shadow: var(--shadow-sm); }
        #yk-portal-v2 .yk-legacy-tool .row-equal > .col-lg-4:nth-child(2) .feature-icon { color: #a34b39; border-color: #efc5bb; background: #fff0eb; }
        #yk-portal-v2 .yk-legacy-tool .row-equal > .col-lg-4:nth-child(3) .feature-icon { color: #9b6a0c; border-color: #ead29a; background: #fff8df; }
        #yk-portal-v2 .yk-legacy-tool .row-equal > .col-lg-4:nth-child(4) .feature-icon { color: #176b76; border-color: #b8dce3; background: #eaf7f8; }
        #yk-portal-v2 .yk-legacy-tool .row-equal > .col-lg-4:nth-child(5) .feature-icon { color: #a34b39; border-color: #efc5bb; background: #fff0eb; }
        #yk-portal-v2 .yk-legacy-tool .row-equal > .col-lg-4:nth-child(6) .feature-icon { color: #9b6a0c; border-color: #ead29a; background: #fff8df; }
        #yk-portal-v2 .yk-legacy-tool .feature-item h3 { margin: 0 0 9px; color: var(--ink); font-size: 1.05rem; font-weight: 800; }
        #yk-portal-v2 .yk-legacy-tool .feature-item p { margin: 0; color: var(--muted); font-size: 0.93rem; }
        #yk-portal-v2 .yk-legacy-tool .feature-label { color: var(--teal-dark); font-weight: 800; }

        /* ===== Screenshot ===== */
        #yk-portal-v2 .yk-legacy-tool .screenshot-band { padding: 70px 0; background: #0d3036; color: #fff; }
        #yk-portal-v2 .yk-legacy-tool .screenshot-copy { max-width: 760px; margin-bottom: 28px; }
        #yk-portal-v2 .yk-legacy-tool .screenshot-copy h2 { margin: 0 0 10px; color: #fff; font-size: 1.85rem; font-weight: 800; }
        #yk-portal-v2 .yk-legacy-tool .screenshot-copy p { margin: 0; color: rgba(255,255,255,0.72); }
        #yk-portal-v2 .yk-legacy-tool .product-screenshot {
            display: block;
            width: 100%;
            height: auto;
            border: 1px solid rgba(255,255,255,0.24);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
        }
        #yk-portal-v2 .yk-legacy-tool .screenshot-caption { margin: 14px 0 0; color: rgba(255,255,255,0.66); font-size: 0.88rem; text-align: center; }

        /* ===== Scenarios ===== */
        #yk-portal-v2 .yk-legacy-tool .scenario-item {
            width: 100%;
            padding: 25px 22px;
            border-bottom: 3px solid var(--teal);
            border-radius: 6px;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }
        #yk-portal-v2 .yk-legacy-tool .scenario-icon { margin-bottom: 16px; color: var(--teal-dark); background: #dff3f0; }
        #yk-portal-v2 .yk-legacy-tool .scenario-item h3 { margin: 0 0 8px; color: var(--ink); font-size: 1rem; font-weight: 800; }
        #yk-portal-v2 .yk-legacy-tool .scenario-item p { margin: 0; color: var(--muted); font-size: 0.92rem; }

        /* ===== Guide ===== */
        #yk-portal-v2 .yk-legacy-tool .guide-list { position: relative; max-width: 900px; margin: 0 auto; }
        #yk-portal-v2 .yk-legacy-tool .guide-list::before { content: ''; position: absolute; top: 30px; bottom: 30px; left: 27px; width: 2px; background: #b9d9d5; }
        #yk-portal-v2 .yk-legacy-tool .guide-step { position: relative; display: grid; grid-template-columns: 56px 1fr; gap: 20px; margin-bottom: 22px; }
        #yk-portal-v2 .yk-legacy-tool .guide-step:last-child { margin-bottom: 0; }
        #yk-portal-v2 .yk-legacy-tool .step-number {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border: 5px solid var(--soft);
            border-radius: 50%;
            color: #fff;
            background: var(--teal);
            font-weight: 800;
        }
        #yk-portal-v2 .yk-legacy-tool .step-copy { padding: 16px 20px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
        #yk-portal-v2 .yk-legacy-tool .step-copy h3 { margin: 0 0 6px; color: var(--ink); font-size: 1.02rem; font-weight: 800; }
        #yk-portal-v2 .yk-legacy-tool .step-copy p { margin: 0; color: var(--muted); font-size: 0.94rem; }
        #yk-portal-v2 .yk-legacy-tool .inline-note { color: var(--teal-dark); font-weight: 700; }

        /* ===== FAQ ===== */
        #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; border: 1px solid var(--line); border-radius: 6px; background: #fff; overflow: hidden; }
        #yk-portal-v2 .yk-legacy-tool .faq-item summary {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 18px 52px 18px 20px;
            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: '+';
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--teal);
            font-size: 1.45rem;
            line-height: 1;
        }
        #yk-portal-v2 .yk-legacy-tool .faq-item[open] summary::after { content: '-'; }
        #yk-portal-v2 .yk-legacy-tool .faq-item[open] summary { background: #edf7f5; }
        #yk-portal-v2 .yk-legacy-tool .faq-answer { padding: 0 20px 18px; color: var(--muted); }
        #yk-portal-v2 .yk-legacy-tool .faq-answer p { margin: 14px 0 0; }

        /* ===== Download ===== */
        #yk-portal-v2 .yk-legacy-tool .download-section { padding: 76px 0; color: #fff; background: #0f4147; text-align: center; }
        #yk-portal-v2 .yk-legacy-tool .download-section h2 { margin: 0 0 12px; color: #fff; font-size: 2rem; font-weight: 800; }
        #yk-portal-v2 .yk-legacy-tool .download-section > .container > p { max-width: 680px; margin: 0 auto 28px; color: rgba(255,255,255,0.78); }
        #yk-portal-v2 .yk-legacy-tool .download-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
        #yk-portal-v2 .yk-legacy-tool .download-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 50px;
            padding: 12px 24px;
            border: 2px solid transparent;
            border-radius: 6px;
            font-weight: 800;
            text-decoration: none;
            transition: transform 0.25s ease, background 0.25s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .download-button:hover { transform: translateY(-2px); text-decoration: none; }
        #yk-portal-v2 .yk-legacy-tool .download-button i { margin-right: 8px; }
        #yk-portal-v2 .yk-legacy-tool .download-button.primary { color: #193239; background: #f4b740; }
        #yk-portal-v2 .yk-legacy-tool .download-button.primary:hover { color: #193239; background: #ffd06b; }
        #yk-portal-v2 .yk-legacy-tool .download-button.secondary { color: #fff; border-color: rgba(255,255,255,0.6); background: transparent; }
        #yk-portal-v2 .yk-legacy-tool .download-button.secondary:hover { color: #fff; border-color: #fff; background: rgba(255,255,255,0.08); }
        #yk-portal-v2 .yk-legacy-tool .download-note { margin-top: 18px; color: rgba(255,255,255,0.72); font-size: 0.9rem; }
        #yk-portal-v2 .yk-legacy-tool .download-note i { margin-right: 6px; color: #7ce8dc; }

        @media (max-width: 1199px) {
            #yk-portal-v2 .yk-legacy-tool .nav-link { margin: 0 9px; }
        }
        @media (max-width: 991px) {
            #yk-portal-v2 .yk-legacy-tool { padding-top: 56px; }
            #yk-portal-v2 .yk-legacy-tool .navbar-collapse { background-color: rgba(10,35,42,0.98); padding: 20px; border-radius: 8px; 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 .hero { padding: 72px 0 66px; }
            #yk-portal-v2 .yk-legacy-tool .hero h1 { font-size: 2.25rem; }
        }
        @media (max-width: 767px) {
            #yk-portal-v2 .yk-legacy-tool .content-section,#yk-portal-v2 .yk-legacy-tool  .screenshot-band,#yk-portal-v2 .yk-legacy-tool  .download-section { padding: 58px 0; }
            #yk-portal-v2 .yk-legacy-tool .hero { padding: 62px 0 58px; }
            #yk-portal-v2 .yk-legacy-tool .hero h1 { font-size: 1.9rem; }
            #yk-portal-v2 .yk-legacy-tool .hero .subtitle { font-size: 1rem; }
            #yk-portal-v2 .yk-legacy-tool .section-heading { margin-bottom: 34px; }
            #yk-portal-v2 .yk-legacy-tool .section-heading h2,#yk-portal-v2 .yk-legacy-tool  .download-section h2 { font-size: 1.65rem; }
            #yk-portal-v2 .yk-legacy-tool .screenshot-copy h2 { font-size: 1.55rem; }
            #yk-portal-v2 .yk-legacy-tool .hero-facts { gap: 12px 18px; }
        }
        @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 .hero { padding: 52px 0 50px; }
            #yk-portal-v2 .yk-legacy-tool .hero h1 { font-size: 1.6rem; }
            #yk-portal-v2 .yk-legacy-tool .hero-actions,#yk-portal-v2 .yk-legacy-tool  .download-actions { flex-direction: column; align-items: stretch; }
            #yk-portal-v2 .yk-legacy-tool .hero-button,#yk-portal-v2 .yk-legacy-tool  .download-button { width: 100%; }
            #yk-portal-v2 .yk-legacy-tool .hero-facts { display: grid; grid-template-columns: 1fr 1fr; }
            #yk-portal-v2 .yk-legacy-tool .guide-step { grid-template-columns: 44px 1fr; gap: 12px; }
            #yk-portal-v2 .yk-legacy-tool .guide-list::before { left: 21px; }
            #yk-portal-v2 .yk-legacy-tool .step-number { width: 44px; height: 44px; border-width: 4px; }
            #yk-portal-v2 .yk-legacy-tool .step-copy { padding: 14px; }
            #yk-portal-v2 .yk-legacy-tool .pain-item,#yk-portal-v2 .yk-legacy-tool  .feature-item,#yk-portal-v2 .yk-legacy-tool  .scenario-item { padding: 22px; }
        }