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

        #yk-portal-v2 .yk-legacy-tool {
            --ink: #12343b;
            --muted: #587078;
            --teal: #0f766e;
            --teal-deep: #0f4c5c;
            --teal-soft: #e8f6f3;
            --mint: #14b8a6;
            --orange: #f59e0b;
            --orange-soft: #fff7e5;
            --line: #d8e7e6;
            --surface: #ffffff;
            --surface-alt: #f5faf9;
            --shadow: 0 18px 50px rgba(15, 76, 92, .12);
            --shadow-soft: 0 8px 24px rgba(15, 76, 92, .08);
        }

        #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;
            color: var(--muted);
            background: var(--surface);
            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-deep); text-decoration: none; }

        /* Shared navigation styling. Keep the fixed bar stable across desktop and mobile. */
        #yk-portal-v2 .yk-legacy-tool .navbar {
            background-color: rgba(13, 25, 49, .90);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            padding: 10px 0;
            transition: all .4s ease;
            box-shadow: 0 5px 20px rgba(0, 0, 0, .10);
        }
        #yk-portal-v2 .yk-legacy-tool .navbar-scrolled {
            padding: 8px 0;
            background-color: rgba(13, 25, 49, .97);
            box-shadow: 0 5px 20px rgba(0, 0, 0, .20);
        }
        #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; margin-right: 10px; object-fit: contain; transition: all .3s ease; }
        #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, .95);
            font-size: 1.5rem;
            font-weight: 700;
            text-shadow: 0 2px 10px rgba(0, 0, 0, .20);
            transition: all .3s ease;
        }
        #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 {
            position: relative;
            margin: 0 15px;
            padding: 10px 0 !important;
            color: rgba(255, 255, 255, .90) !important;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            transition: all .3s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .nav-link:before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background-color: var(--mint);
            transform: translateX(-50%) scale(0);
            transition: transform .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: #5eead4 !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: 0; outline: 0; padding: 0; }
        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon { position: relative; width: 24px; height: 17px; background-image: none; }
        #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 {
            content: '';
            position: absolute;
            left: 0;
            width: 100%;
            height: 2px;
            border-radius: 3px;
            background-color: #fff;
            transition: all .3s ease;
        }
        #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; }
        @media (max-width: 991px) {
            #yk-portal-v2 .yk-legacy-tool .navbar-collapse {
                margin-top: 15px;
                padding: 20px;
                border-radius: 10px;
                background-color: rgba(13, 25, 49, .98);
                box-shadow: 0 10px 30px rgba(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; }
        }
        @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 {
            height: auto !important;
            min-height: auto !important;
            position: relative;
            overflow: hidden;
            padding: 82px 0 76px;
            color: #fff;
            background: linear-gradient(118deg, #0f4c5c 0%, #126e78 55%, #0f766e 100%);
        }
        #yk-portal-v2 .yk-legacy-tool .hero:after {
            content: '';
            position: absolute;
            inset: auto -8% -100px 25%;
            height: 230px;
            background: rgba(255,255,255,.08);
            border-radius: 50%;
            transform: rotate(-4deg);
        }
        #yk-portal-v2 .yk-legacy-tool .hero .container { position: relative; z-index: 1; }
        #yk-portal-v2 .yk-legacy-tool .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 13px;
            border: 1px solid rgba(255,255,255,.25);
            border-radius: 999px;
            background: rgba(255,255,255,.10);
            color: #d8fffa;
            font-size: .86rem;
            font-weight: 700;
            letter-spacing: .04em;
        }
        #yk-portal-v2 .yk-legacy-tool .hero h1 { margin: 20px 0 15px; color: #fff; font-size: clamp(2rem, 4.2vw, 3.35rem); font-weight: 900; line-height: 1.2; }
        #yk-portal-v2 .yk-legacy-tool .hero .subtitle { max-width: 760px; margin: 0; color: rgba(255,255,255,.89); font-size: 1.13rem; }
        #yk-portal-v2 .yk-legacy-tool .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
        #yk-portal-v2 .yk-legacy-tool .btn-primary-solid,#yk-portal-v2 .yk-legacy-tool  .btn-light-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 46px;
            padding: 11px 20px;
            border-radius: 7px;
            font-weight: 800;
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .btn-primary-solid { background: var(--orange); color: #243b3f; box-shadow: 0 8px 18px rgba(245,158,11,.25); }
        #yk-portal-v2 .yk-legacy-tool .btn-primary-solid:hover { color: #243b3f; transform: translateY(-2px); box-shadow: 0 12px 24px rgba(245,158,11,.35); }
        #yk-portal-v2 .yk-legacy-tool .btn-light-outline { border: 1px solid rgba(255,255,255,.45); color: #fff; background: rgba(255,255,255,.08); }
        #yk-portal-v2 .yk-legacy-tool .btn-light-outline:hover { color: #fff; background: rgba(255,255,255,.16); transform: translateY(-2px); }
        #yk-portal-v2 .yk-legacy-tool .hero-metrics { display: flex; flex-wrap: wrap; gap: 26px; margin-top: 34px; }
        #yk-portal-v2 .yk-legacy-tool .hero-metric strong { display: block; color: #fff; font-size: 1.3rem; line-height: 1.25; }
        #yk-portal-v2 .yk-legacy-tool .hero-metric span { color: rgba(255,255,255,.72); font-size: .86rem; }
        #yk-portal-v2 .yk-legacy-tool .hero-panel { margin: 4px 0 0 auto; max-width: 400px; padding: 22px; border: 1px solid rgba(255,255,255,.20); border-radius: 10px; background: rgba(3, 37, 45, .32); box-shadow: 0 20px 40px rgba(0,0,0,.16); }
        #yk-portal-v2 .yk-legacy-tool .hero-panel-top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,.14); }
        #yk-portal-v2 .yk-legacy-tool .hero-panel-title { color: #e9fffb; font-weight: 800; }
        #yk-portal-v2 .yk-legacy-tool .status-dot { width: 9px; height: 9px; border-radius: 50%; background: #fbbf24; box-shadow: 0 0 0 5px rgba(251,191,36,.16); }
        #yk-portal-v2 .yk-legacy-tool .hero-template { margin: 18px 0; padding: 16px; border-radius: 7px; background: rgba(255,255,255,.09); color: #f5fffd; font-family: Consolas, monospace; font-size: .92rem; line-height: 1.8; }
        #yk-portal-v2 .yk-legacy-tool .hero-template em { color: #fcd34d; font-style: normal; }
        #yk-portal-v2 .yk-legacy-tool .hero-panel-foot { display: flex; justify-content: space-between; color: rgba(255,255,255,.68); font-size: .83rem; }

        #yk-portal-v2 .yk-legacy-tool .quick-nav { border-bottom: 1px solid var(--line); background: #fff; }
        #yk-portal-v2 .yk-legacy-tool .quick-nav .container { display: flex; align-items: center; gap: 22px; overflow-x: auto; min-height: 54px; }
        #yk-portal-v2 .yk-legacy-tool .quick-nav a { flex: 0 0 auto; color: #42616a; font-size: .91rem; font-weight: 700; }
        #yk-portal-v2 .yk-legacy-tool .quick-nav a:hover { color: var(--teal); }

        #yk-portal-v2 .yk-legacy-tool .section { padding: 82px 0; }
        #yk-portal-v2 .yk-legacy-tool .section-alt { background: var(--surface-alt); }
        #yk-portal-v2 .yk-legacy-tool .section-heading { max-width: 720px; margin: 0 auto 44px; text-align: center; }
        #yk-portal-v2 .yk-legacy-tool .eyebrow { margin-bottom: 8px; color: var(--teal); font-size: .82rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
        #yk-portal-v2 .yk-legacy-tool .section-heading h2 { margin: 0 0 13px; color: var(--ink); font-size: clamp(1.75rem, 3vw, 2.45rem); font-weight: 900; line-height: 1.25; }
        #yk-portal-v2 .yk-legacy-tool .section-heading p { margin: 0; color: var(--muted); }

        #yk-portal-v2 .yk-legacy-tool .pain-grid,#yk-portal-v2 .yk-legacy-tool  .feature-grid,#yk-portal-v2 .yk-legacy-tool  .scenario-grid { display: grid; gap: 18px; }
        #yk-portal-v2 .yk-legacy-tool .pain-grid { grid-template-columns: repeat(3, 1fr); }
        #yk-portal-v2 .yk-legacy-tool .pain-card,#yk-portal-v2 .yk-legacy-tool  .feature-card,#yk-portal-v2 .yk-legacy-tool  .scenario-card { height: 100%; padding: 26px; border: 1px solid var(--line); border-radius: 9px; background: #fff; box-shadow: var(--shadow-soft); }
        #yk-portal-v2 .yk-legacy-tool .pain-card { border-top: 4px solid var(--orange); }
        #yk-portal-v2 .yk-legacy-tool .pain-card:nth-child(2) { border-top-color: var(--mint); }
        #yk-portal-v2 .yk-legacy-tool .pain-card:nth-child(3) { border-top-color: #4b9db1; }
        #yk-portal-v2 .yk-legacy-tool .icon-box { display: grid; place-items: center; width: 48px; height: 48px; margin-bottom: 18px; border-radius: 8px; background: var(--teal-soft); color: var(--teal); font-size: 1.18rem; }
        #yk-portal-v2 .yk-legacy-tool .pain-card:nth-child(1) .icon-box { background: var(--orange-soft); color: #b45309; }
        #yk-portal-v2 .yk-legacy-tool .pain-card h3,#yk-portal-v2 .yk-legacy-tool  .feature-card h3,#yk-portal-v2 .yk-legacy-tool  .scenario-card h3 { margin: 0 0 9px; color: var(--ink); font-size: 1.14rem; font-weight: 900; }
        #yk-portal-v2 .yk-legacy-tool .pain-card p,#yk-portal-v2 .yk-legacy-tool  .feature-card p,#yk-portal-v2 .yk-legacy-tool  .scenario-card p { margin: 0; font-size: .94rem; }

        #yk-portal-v2 .yk-legacy-tool .feature-grid { grid-template-columns: repeat(3, 1fr); }
        #yk-portal-v2 .yk-legacy-tool .feature-card { position: relative; overflow: hidden; }
        #yk-portal-v2 .yk-legacy-tool .feature-card:after { content: ''; position: absolute; top: 0; right: 0; width: 72px; height: 72px; border-radius: 0 0 0 72px; background: var(--teal-soft); opacity: .65; }
        #yk-portal-v2 .yk-legacy-tool .feature-card .icon-box { position: relative; z-index: 1; background: var(--teal); color: #fff; }
        #yk-portal-v2 .yk-legacy-tool .feature-card:nth-child(2) .icon-box,#yk-portal-v2 .yk-legacy-tool  .feature-card:nth-child(5) .icon-box { background: #d97706; }
        #yk-portal-v2 .yk-legacy-tool .feature-card:nth-child(3) .icon-box,#yk-portal-v2 .yk-legacy-tool  .feature-card:nth-child(6) .icon-box { background: #2b7a78; }
        #yk-portal-v2 .yk-legacy-tool .feature-card h3 { position: relative; z-index: 1; }
        #yk-portal-v2 .yk-legacy-tool .feature-card p { position: relative; z-index: 1; }
        #yk-portal-v2 .yk-legacy-tool .feature-tag { display: inline-block; margin-top: 17px; padding: 4px 9px; border-radius: 4px; background: #edf8f6; color: var(--teal); font-size: .78rem; font-weight: 800; }

        #yk-portal-v2 .yk-legacy-tool .screenshot-layout { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, .8fr); gap: 38px; align-items: center; }
        #yk-portal-v2 .yk-legacy-tool .screenshot-frame { margin: 0; padding: 9px; border: 1px solid var(--line); border-radius: 10px; background: #eef7f6; box-shadow: var(--shadow); }
        #yk-portal-v2 .yk-legacy-tool .screenshot-frame img { display: block; width: 100%; height: auto; border-radius: 5px; }
        #yk-portal-v2 .yk-legacy-tool .screenshot-copy h2 { margin: 0 0 16px; color: var(--ink); font-size: 2rem; font-weight: 900; line-height: 1.3; }
        #yk-portal-v2 .yk-legacy-tool .screenshot-copy p { margin-bottom: 20px; }
        #yk-portal-v2 .yk-legacy-tool .check-list { margin: 0; padding: 0; list-style: none; }
        #yk-portal-v2 .yk-legacy-tool .check-list li { display: flex; gap: 10px; margin-bottom: 11px; color: #3c5e66; font-size: .94rem; }
        #yk-portal-v2 .yk-legacy-tool .check-list i { margin-top: 5px; color: var(--teal); }

        #yk-portal-v2 .yk-legacy-tool .scenario-grid { grid-template-columns: repeat(4, 1fr); }
        #yk-portal-v2 .yk-legacy-tool .scenario-card { padding: 24px; box-shadow: none; background: transparent; }
        #yk-portal-v2 .yk-legacy-tool .scenario-card .icon-box { background: #fff; border: 1px solid var(--line); }
        #yk-portal-v2 .yk-legacy-tool .scenario-card h3 { font-size: 1.04rem; }
        #yk-portal-v2 .yk-legacy-tool .scenario-card p { font-size: .9rem; }

        #yk-portal-v2 .yk-legacy-tool .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
        #yk-portal-v2 .yk-legacy-tool .step { position: relative; padding: 26px 22px 24px; border: 1px solid var(--line); border-radius: 9px; background: #fff; box-shadow: var(--shadow-soft); }
        #yk-portal-v2 .yk-legacy-tool .step-number { display: grid; place-items: center; width: 36px; height: 36px; margin-bottom: 18px; border-radius: 50%; background: var(--teal); color: #fff; font-weight: 900; }
        #yk-portal-v2 .yk-legacy-tool .step h3 { margin: 0 0 8px; color: var(--ink); font-size: 1.02rem; font-weight: 900; }
        #yk-portal-v2 .yk-legacy-tool .step p { margin: 0; font-size: .9rem; }
        #yk-portal-v2 .yk-legacy-tool .step code { padding: 2px 5px; border-radius: 3px; background: #eff8f7; color: var(--teal-deep); font-family: Consolas, monospace; font-size: .86em; }
        #yk-portal-v2 .yk-legacy-tool .tip-box { margin-top: 22px; padding: 15px 18px; border-left: 4px solid var(--orange); border-radius: 5px; background: var(--orange-soft); color: #795315; font-size: .9rem; }

        #yk-portal-v2 .yk-legacy-tool .faq-list { max-width: 860px; margin: 0 auto; }
        #yk-portal-v2 .yk-legacy-tool .faq-item { margin-bottom: 11px; border: 1px solid var(--line); border-radius: 7px; background: #fff; overflow: hidden; }
        #yk-portal-v2 .yk-legacy-tool .faq-question { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 18px 20px; border: 0; background: #fff; color: var(--ink); text-align: left; font: inherit; font-weight: 900; cursor: pointer; }
        #yk-portal-v2 .yk-legacy-tool .faq-question i { color: var(--teal); transition: transform .2s ease; }
        #yk-portal-v2 .yk-legacy-tool .faq-question.active i { transform: rotate(180deg); }
        #yk-portal-v2 .yk-legacy-tool .faq-answer { display: none; padding: 0 20px 19px; color: var(--muted); font-size: .93rem; }
        #yk-portal-v2 .yk-legacy-tool .faq-answer.open { display: block; }

        #yk-portal-v2 .yk-legacy-tool .download-section { padding: 80px 0; background: linear-gradient(118deg, #0f4c5c, #126e78); color: #fff; }
        #yk-portal-v2 .yk-legacy-tool .download-wrap { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
        #yk-portal-v2 .yk-legacy-tool .download-wrap h2 { margin: 0 0 10px; color: #fff; font-size: clamp(1.7rem, 3vw, 2.35rem); font-weight: 900; }
        #yk-portal-v2 .yk-legacy-tool .download-wrap p { max-width: 650px; margin: 0; color: rgba(255,255,255,.80); }
        #yk-portal-v2 .yk-legacy-tool .download-actions { display: flex; flex-wrap: wrap; gap: 11px; flex: 0 0 auto; }
        #yk-portal-v2 .yk-legacy-tool .download-actions .btn-light-outline { min-width: 185px; }
        #yk-portal-v2 .yk-legacy-tool .download-note { margin-top: 16px; color: rgba(255,255,255,.67); font-size: .85rem; }

        @media (max-width: 991px) {
            #yk-portal-v2 .yk-legacy-tool .hero { padding: 66px 0 62px; }
            #yk-portal-v2 .yk-legacy-tool .hero-panel { margin: 36px 0 0; max-width: none; }
            #yk-portal-v2 .yk-legacy-tool .pain-grid,#yk-portal-v2 .yk-legacy-tool  .feature-grid { grid-template-columns: repeat(2, 1fr); }
            #yk-portal-v2 .yk-legacy-tool .scenario-grid { grid-template-columns: repeat(2, 1fr); }
            #yk-portal-v2 .yk-legacy-tool .steps { grid-template-columns: repeat(2, 1fr); }
            #yk-portal-v2 .yk-legacy-tool .screenshot-layout { grid-template-columns: 1fr; }
            #yk-portal-v2 .yk-legacy-tool .screenshot-copy { max-width: 720px; }
            #yk-portal-v2 .yk-legacy-tool .download-wrap { display: block; }
            #yk-portal-v2 .yk-legacy-tool .download-actions { margin-top: 22px; }
        }
        @media (max-width: 575px) {
            #yk-portal-v2 .yk-legacy-tool { padding-top: 56px; }
            #yk-portal-v2 .yk-legacy-tool .hero { padding: 50px 0 48px; }
            #yk-portal-v2 .yk-legacy-tool .hero h1 { font-size: 2rem; }
            #yk-portal-v2 .yk-legacy-tool .hero .subtitle { font-size: 1rem; }
            #yk-portal-v2 .yk-legacy-tool .hero-actions { display: grid; grid-template-columns: 1fr; }
            #yk-portal-v2 .yk-legacy-tool .hero-actions a { width: 100%; }
            #yk-portal-v2 .yk-legacy-tool .hero-metrics { gap: 18px; }
            #yk-portal-v2 .yk-legacy-tool .section { padding: 60px 0; }
            #yk-portal-v2 .yk-legacy-tool .pain-grid,#yk-portal-v2 .yk-legacy-tool  .feature-grid,#yk-portal-v2 .yk-legacy-tool  .scenario-grid,#yk-portal-v2 .yk-legacy-tool  .steps { grid-template-columns: 1fr; }
            #yk-portal-v2 .yk-legacy-tool .quick-nav .container { gap: 16px; }
            #yk-portal-v2 .yk-legacy-tool .screenshot-copy h2 { font-size: 1.65rem; }
            #yk-portal-v2 .yk-legacy-tool .download-actions { display: grid; grid-template-columns: 1fr; }
            #yk-portal-v2 .yk-legacy-tool .download-actions a { width: 100%; }
        }