:root {
            --bg: #faf8f4;
            --bg-warm: #f3efe8;
            --ink: #1a1714;
            --ink-soft: #3d3830;
            --muted: #8a8279;
            --accent: #0055ff;
            --accent-light: #e8f0ff;
            --coral: #ff5a3c;
            --coral-light: #fff0ec;
            --mint: #00b87a;
            --mint-light: #e6f9f2;
            --amber: #f59e0b;
            --violet: #7c3aed;
            --line: rgba(26,23,20,.08);
            --line-dark: rgba(26,23,20,.14);
            --card: #ffffff;
            --shadow: 0 1px 3px rgba(26,23,20,.04),0 6px 24px rgba(26,23,20,.06);
            --shadow-lg: 0 4px 12px rgba(26,23,20,.04),0 20px 60px rgba(26,23,20,.1);
        }
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
            overflow-x: hidden;
        }
        body {
            font-family: 'DM Sans', sans-serif;
            background: var(--bg);
            color: var(--ink);
            overflow-x: hidden;
            line-height: 1.6;
        }
        ::selection {
            background: var(--accent);
            color: #fff;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all .3s cubic-bezier(.22,1,.36,1);
        }
        ul {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 clamp(20px,4vw,48px);
        }
        h1,
        h2,
        h3,
        h4 {
            font-family: 'Instrument Serif', serif;
            font-weight: 400;
            letter-spacing: -.02em;
        }

        nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            backdrop-filter: blur(20px) saturate(1.6);
            -webkit-backdrop-filter: blur(20px) saturate(1.6);
            background: rgba(250,248,244,.8);
            border-bottom: 1px solid var(--line);
            transition: box-shadow .3s ease;
        }
        nav.scrolled {
            box-shadow: 0 1px 8px rgba(26,23,20,.06);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: 'Instrument Serif', serif;
            font-size: 1.35rem;
            font-weight: 400;
            color: var(--ink);
        }
        .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--accent), var(--violet));
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 8px rgba(0,85,255,.25);
            transition: transform .3s ease;
        }
        .logo:hover .logo-icon {
            transform: rotate(-8deg) scale(1.08);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-right a {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: .88rem;
            font-weight: 500;
            color: var(--ink-soft);
            transition: all .2s ease;
        }
        .nav-right a:hover {
            background: rgba(26,23,20,.04);
            color: var(--ink);
        }
        .nav-right a.active {
            background: var(--accent-light);
            color: var(--accent);
        }
        .mobile-btn {
            display: none;
            background: none;
            border: none;
            color: var(--ink);
            font-size: 1.4rem;
            cursor: pointer;
        }

        .breadcrumb {
            padding: 84px 0 0;
            position: relative;
            z-index: 1;
            font-family: 'JetBrains Mono', monospace;
            font-size: .78rem;
            color: var(--muted);
        }
        .breadcrumb a {
            color: var(--muted);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            opacity: .4;
        }

        .hero {
            padding: clamp(24px,4vh,48px) 0 clamp(40px,6vh,72px);
            position: relative;
            z-index: 1;
        }
        .hero-head {
            margin-bottom: clamp(32px,4vw,56px);
        }
        .hero-head h1 {
            font-size: clamp(2.4rem,5vw,4rem);
            line-height: 1.05;
            margin-bottom: 12px;
        }
        .hero-head h1 em {
            font-style: italic;
            background: linear-gradient(135deg, var(--accent), var(--violet));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hh-meta {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            font-family: 'JetBrains Mono', monospace;
            font-size: .78rem;
            color: var(--muted);
        }
        .hh-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hm-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            display: inline-block;
        }

        .journey {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .j-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: clamp(18px,2.5vw,28px);
            transition: all .3s ease;
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }
        .j-row:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .j-left {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .jl-top {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .jl-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .jr-win .jl-icon {
            background: var(--accent-light);
            color: var(--accent);
        }
        .jr-mac .jl-icon {
            background: rgba(124,58,237,.08);
            color: var(--violet);
        }
        .jr-ios .jl-icon {
            background: var(--mint-light);
            color: var(--mint);
        }
        .jr-and .jl-icon {
            background: var(--coral-light);
            color: var(--coral);
        }
        .jl-name {
            font-family: 'Instrument Serif', serif;
            font-size: 1.3rem;
        }
        .jl-badge {
            padding: 2px 10px;
            border-radius: 100px;
            font-family: 'JetBrains Mono', monospace;
            font-size: .68rem;
            font-weight: 500;
            letter-spacing: .04em;
            background: rgba(26,23,20,.04);
            color: var(--muted);
        }
        .jl-desc {
            font-size: .8rem;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
            padding-left: 48px;
        }
        .j-right {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .jr-steps {
            display: flex;
            align-items: center;
            gap: 0;
        }
        .jr-node {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
        }
        .jr-circle {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg);
            border: 2px solid var(--line-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: 'JetBrains Mono', monospace;
            font-size: .72rem;
            font-weight: 600;
            color: var(--ink-soft);
        }
        .jr-connector {
            width: 24px;
            height: 2px;
            background: var(--line-dark);
            margin: 0 6px;
        }
        .jr-label {
            font-size: .7rem;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
        }
        .jr-goto {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: .85rem;
            font-weight: 500;
            color: var(--accent);
        }

        .editorial-section {
            padding: clamp(50px,7vh,90px) 0;
            border-top: 1px solid var(--line);
        }
        .ed-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: clamp(30px,5vw,60px);
            align-items: start;
        }
        .ed-inner.reversed {
            direction: rtl;
        }
        .ed-inner.reversed>* {
            direction: ltr;
        }
        .ed-header {
            position: sticky;
            top: 80px;
        }
        .ed-num {
            font-family: 'JetBrains Mono', monospace;
            font-size: .8rem;
            font-weight: 500;
            color: var(--muted);
            margin-bottom: 12px;
            letter-spacing: .1em;
        }
        .ed-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 6px;
            font-family: 'JetBrains Mono', monospace;
            font-size: .7rem;
            font-weight: 500;
            letter-spacing: .04em;
            margin-bottom: 16px;
        }
        .tag-blue {
            background: var(--accent-light);
            color: var(--accent);
        }
        .tag-violet {
            background: rgba(124,58,237,.08);
            color: var(--violet);
        }
        .tag-mint {
            background: var(--mint-light);
            color: var(--mint);
        }
        .tag-coral {
            background: var(--coral-light);
            color: var(--coral);
        }
        .ed-header h2 {
            font-size: clamp(2rem,3.5vw,2.6rem);
            margin-bottom: 12px;
        }
        .ed-header p {
            color: var(--muted);
            font-size: .95rem;
            margin-bottom: 20px;
            max-width: 90%;
        }
        .ed-meta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-family: 'JetBrains Mono', monospace;
            font-size: .75rem;
            color: var(--muted);
        }
        .ed-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .em-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
        }
        .ed-steps {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .ed-step {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 16px;
            overflow: hidden;
            transition: box-shadow .3s ease;
        }
        .ed-step:hover {
            box-shadow: var(--shadow);
        }
        .ed-step-head {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 22px;
            cursor: pointer;
            user-select: none;
        }
        .ed-step-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            flex-shrink: 0;
        }
        .sd1 {
            background: var(--accent);
        }
        .sd2 {
            background: var(--violet);
        }
        .sd3 {
            background: var(--mint);
        }
        .sd4 {
            background: var(--coral);
        }
        .esh-title {
            font-family: 'DM Sans', sans-serif;
            font-weight: 700;
            font-size: 1rem;
            flex: 1;
            letter-spacing: 0;
        }
        .esh-brief {
            font-size: .78rem;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
        }
        .esh-toggle {
            transition: transform .3s ease;
            color: var(--muted);
        }
        .ed-step.open .esh-toggle {
            transform: rotate(180deg);
        }
        .ed-step-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }
        .ed-step.open .ed-step-body {
            max-height: 600px;
        }
        .ed-step-body-inner {
            padding: 0 22px 20px 46px;
            font-size: .9rem;
            line-height: 1.8;
            color: var(--ink-soft);
        }
        .ed-step-body-inner ol {
            padding-left: 18px;
            margin-bottom: 14px;
        }
        .ed-step-body-inner li {
            margin-bottom: 6px;
        }
        .ed-step-body-inner code {
            font-family: 'JetBrains Mono', monospace;
            font-size: .82rem;
            padding: 2px 8px;
            border-radius: 4px;
            background: rgba(26,23,20,.04);
            color: var(--ink-soft);
        }
        .tip-box {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: .85rem;
            line-height: 1.6;
        }
        .tb-info {
            background: var(--accent-light);
            color: var(--accent);
        }
        .tb-warn {
            background: rgba(245,158,11,.1);
            color: var(--amber);
        }
        .tb-ok {
            background: var(--mint-light);
            color: var(--mint);
        }
        .tb-icon {
            font-style: normal;
            flex-shrink: 0;
            font-weight: 700;
        }

        .knowledge-section {
            padding: clamp(50px,7vh,90px) 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: clamp(36px,4.5vw,58px);
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: 'JetBrains Mono', monospace;
            font-size: .75rem;
            font-weight: 500;
            color: var(--accent);
            letter-spacing: .12em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-tag::before,
        .section-tag::after {
            content: '';
            width: 20px;
            height: 1px;
            background: var(--accent);
            opacity: .3;
        }
        .section-head h2 {
            font-size: clamp(2rem,4vw,3.2rem);
            line-height: 1.1;
            margin-bottom: 12px;
        }
        .section-head p {
            color: var(--muted);
            font-size: 1rem;
            max-width: 480px;
            margin: 0 auto;
        }
        .kb-grid {
            display: grid;
            grid-template-columns: repeat(3,1fr);
            gap: 16px;
        }
        .kb-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: clamp(20px,2.5vw,28px);
            transition: all .3s ease;
        }
        .kb-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .kb-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .kb-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .ki1 {
            background: var(--accent-light);
            color: var(--accent);
        }
        .ki2 {
            background: var(--coral-light);
            color: var(--coral);
        }
        .ki3 {
            background: var(--mint-light);
            color: var(--mint);
        }
        .kb-head h3 {
            font-family: 'DM Sans', sans-serif;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0;
        }
        .kb-body {
            color: var(--muted);
            font-size: .88rem;
            line-height: 1.7;
        }
        .kb-body code {
            font-family: 'JetBrains Mono', monospace;
            font-size: .78rem;
            padding: 2px 6px;
            border-radius: 4px;
            background: rgba(26,23,20,.04);
        }

        .tips-scroll {
            padding: clamp(50px,7vh,90px) 0;
        }
        .tips-track {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            padding-bottom: 16px;
        }
        .tips-track::-webkit-scrollbar {
            height: 4px;
        }
        .tips-track::-webkit-scrollbar-track {
            background: transparent;
        }
        .tips-track::-webkit-scrollbar-thumb {
            background: var(--line-dark);
            border-radius: 2px;
        }
        .tip-card {
            flex: 0 0 280px;
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: 24px;
        }
        .tc-num {
            font-family: 'JetBrains Mono', monospace;
            font-size: .7rem;
            font-weight: 500;
            letter-spacing: .1em;
            display: block;
            margin-bottom: 10px;
        }
        .tcn1 {
            color: var(--accent);
        }
        .tcn2 {
            color: var(--coral);
        }
        .tcn3 {
            color: var(--mint);
        }
        .tcn4 {
            color: var(--violet);
        }
        .tcn5 {
            color: var(--amber);
        }
        .tip-card h4 {
            font-family: 'DM Sans', sans-serif;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 8px;
            letter-spacing: 0;
        }
        .tip-card p {
            font-size: .85rem;
            color: var(--muted);
            line-height: 1.6;
        }

        /* 新板块：排查向导 */
        .troubleshoot-section {
            padding: clamp(50px,7vh,90px) 0;
            border-top: 1px solid var(--line);
        }
        .ts-grid {
            display: grid;
            grid-template-columns: repeat(2,1fr);
            gap: 20px;
        }
        .ts-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: clamp(22px,2.5vw,32px);
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }
        .ts-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .ts-card .ts-num {
            font-family: 'JetBrains Mono', monospace;
            font-size: .75rem;
            font-weight: 500;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .ts-card h3 {
            font-family: 'DM Sans', sans-serif;
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 8px;
            letter-spacing: 0;
        }
        .ts-card p {
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.7;
            flex: 1;
        }
        .ts-card .ts-solution {
            margin-top: 14px;
            padding: 12px 16px;
            background: var(--bg);
            border-radius: 12px;
            font-size: .85rem;
            color: var(--ink-soft);
            border-left: 3px solid var(--accent);
        }

        .optimize-section {
            padding: clamp(50px,7vh,90px) 0;
        }
        .opt-grid {
            display: grid;
            grid-template-columns: repeat(3,1fr);
            gap: 16px;
        }
        .opt-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: clamp(20px,2vw,28px);
            text-align: center;
            transition: all .3s ease;
        }
        .opt-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .opt-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.5rem;
        }
        .opt-card:nth-child(1) .opt-icon {
            background: var(--accent-light);
            color: var(--accent);
        }
        .opt-card:nth-child(2) .opt-icon {
            background: var(--coral-light);
            color: var(--coral);
        }
        .opt-card:nth-child(3) .opt-icon {
            background: var(--mint-light);
            color: var(--mint);
        }
        .opt-card h3 {
            font-family: 'DM Sans', sans-serif;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 6px;
            letter-spacing: 0;
        }
        .opt-card p {
            font-size: .85rem;
            color: var(--muted);
            line-height: 1.6;
        }

        .cta-section {
            padding: clamp(60px,8vh,100px) 0;
            position: relative;
            z-index: 1;
        }
        .cta-inner {
            background: var(--ink);
            border-radius: 28px;
            padding: clamp(50px,6vw,80px);
            text-align: center;
            position: relative;
            overflow: hidden;
            color: #fff;
        }
        .cta-inner::before {
            content: '';
            position: absolute;
            top: -150px;
            left: 50%;
            width: 500px;
            height: 500px;
            transform: translateX(-50%);
            background: radial-gradient(circle, rgba(0,85,255,.2), transparent 60%);
            pointer-events: none;
        }
        .cta-inner h2 {
            font-size: clamp(2rem,4vw,3rem);
            line-height: 1.1;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .cta-inner h2 em {
            font-style: italic;
            color: var(--accent);
        }
        .cta-inner p {
            color: rgba(255,255,255,.5);
            font-size: 1.05rem;
            margin-bottom: 36px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
        }
        .cta-btns {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .btn-solid {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 12px;
            background: var(--ink);
            color: #fff;
            font-weight: 600;
            font-size: .95rem;
            font-family: 'DM Sans', sans-serif;
            border: none;
            cursor: pointer;
            transition: all .3s ease;
            box-shadow: 0 2px 8px rgba(26,23,20,.15);
            text-decoration: none;
        }
        .btn-solid:hover {
            background: var(--accent);
            box-shadow: 0 4px 20px rgba(0,85,255,.3);
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 12px;
            background: var(--card);
            color: var(--ink);
            font-weight: 600;
            font-size: .95rem;
            font-family: 'DM Sans', sans-serif;
            border: 1.5px solid var(--line-dark);
            cursor: pointer;
            transition: all .3s ease;
            text-decoration: none;
        }
        .btn-outline:hover {
            border-color: var(--accent);
            background: var(--accent-light);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .cta-section .btn-solid {
            background: #fff;
            color: var(--ink);
            box-shadow: none;
        }
        .cta-section .btn-solid:hover {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 20px rgba(0,85,255,.4);
        }
        .cta-section .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255,255,255,.2);
        }
        .cta-section .btn-outline:hover {
            border-color: var(--accent);
            background: rgba(0,85,255,.15);
            color: #fff;
        }

        .footer {
            border-top: 1px solid var(--line);
            padding: 60px 0 28px;
            position: relative;
            z-index: 1;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2.5fr 1fr 1fr 1fr;
            gap: clamp(24px,4vw,60px);
            margin-bottom: 48px;
        }
        .footer-brand p {
            color: var(--muted);
            font-size: .88rem;
            max-width: 280px;
            line-height: 1.7;
            margin-top: 14px;
        }
        .footer-col h4 {
            font-family: 'JetBrains Mono', monospace;
            font-size: .75rem;
            font-weight: 500;
            color: var(--ink);
            margin-bottom: 18px;
            letter-spacing: .1em;
            text-transform: uppercase;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: var(--muted);
            font-size: .88rem;
            transition: all .3s ease;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--line);
            font-size: .78rem;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
        }

        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--card);
            border: 1px solid var(--line);
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all .3s ease;
            z-index: 99;
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
        }

        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: all .7s cubic-bezier(.22,1,.36,1);
        }
        .reveal.show {
            opacity: 1;
            transform: translateY(0);
        }
        .reveal-d1 {
            transition-delay: .1s;
        }
        .reveal-d2 {
            transition-delay: .2s;
        }
        .reveal-d3 {
            transition-delay: .3s;
        }
        .reveal-d4 {
            transition-delay: .4s;
        }

        @media(max-width:1024px) {
            .ed-inner {
                grid-template-columns: 1fr;
            }
            .ed-inner.reversed {
                direction: ltr;
            }
            .kb-grid {
                grid-template-columns: 1fr 1fr;
            }
            .ts-grid {
                grid-template-columns: 1fr;
            }
            .opt-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media(max-width:768px) {
            .nav-right a:not(.nav-right a.active) {
                display: none;
            }
            .nav-right a.active {
                display: block;
            }
            .mobile-btn {
                display: block;
            }
            .j-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .jr-steps {
                flex-wrap: wrap;
                justify-content: flex-start;
            }
            .kb-grid {
                grid-template-columns: 1fr;
            }
            .opt-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }