html {
            scroll-padding-top: 124px;
        }

        /* ── Page Hero ── */
        .dl-hero {
            padding: 72px 0 56px;
            text-align: center;
        }

        .dl-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 5px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 24px;
        }

        .dl-hero h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 600;
            letter-spacing: -0.03em;
            line-height: 1.1;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .dl-hero p {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 32px;
        }

        .detected-platform {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: var(--success-light);
            border: 1px solid #a7f3d0;
            border-radius: 10px;
            font-size: 0.85rem;
            color: #065f46;
            font-weight: 500;
        }

        .detected-platform i { color: var(--success); }

        
        .dl-jump-bar {
            position: sticky;
            top: 68px;
            z-index: 90;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 8px;
        }

        .dl-jump-inner {
            display: flex;
            gap: 8px;
            padding: 10px 24px;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .dl-jump-inner::-webkit-scrollbar { display: none; }

        .dl-jump-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
            padding: 8px 14px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-muted);
            text-decoration: none;
            background: var(--bg-neutral);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            transition: all 0.2s;
        }

        .dl-jump-item:hover {
            color: var(--text-main);
            border-color: #c7d2fe;
            background: var(--bg-surface);
        }

        .dl-jump-item.is-active {
            color: var(--primary);
            background: var(--primary-light);
            border-color: transparent;
        }

        
        .dl-page-layout {
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 32px;
            align-items: start;
        }

        .dl-toc {
            position: sticky;
            top: 130px;
            max-height: calc(100vh - 150px);
            overflow-y: auto;
            padding: 16px 14px;
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: 14px;
            scrollbar-width: thin;
        }

        .dl-toc-title {
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .dl-toc-nav {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .dl-toc-platform {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-main);
            text-decoration: none;
            padding: 6px 8px;
            border-radius: 8px;
            transition: background 0.15s, color 0.15s;
        }

        .dl-toc-platform span {
            margin-left: auto;
            font-size: 0.68rem;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            padding: 2px 7px;
            border-radius: 10px;
        }

        .dl-toc-platform:hover,
        .dl-toc-platform.is-active {
            background: var(--primary-light);
            color: var(--primary);
        }

        .dl-toc-group ul {
            list-style: none;
            margin: 6px 0 0;
            padding: 0 0 0 12px;
            border-left: 2px solid var(--border-color);
        }

        .dl-toc-group li { margin: 2px 0; }

        .dl-toc-group ul a {
            display: block;
            padding: 5px 8px;
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--text-muted);
            text-decoration: none;
            border-radius: 6px;
            transition: color 0.15s, background 0.15s;
        }

        .dl-toc-group ul a:hover,
        .dl-toc-group ul a.is-active {
            color: var(--primary);
            background: var(--bg-neutral);
        }

        .dl-main { min-width: 0; }

        .platform-section,
        .app-card {
            scroll-margin-top: 124px;
        }

        /* ── Platform sections ── */
        .platforms-section { padding: 0 0 80px; }

        .section-label {
            font-size: 0.72rem;
            font-weight: 500;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .platforms-stack {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .platform-section {
            background: var(--bg-surface);
            border: 1.5px solid var(--border-color);
            border-radius: 18px;
            padding: 24px 26px 22px;
            transition: box-shadow 0.2s, border-color 0.2s;
        }

        .platform-section.detected {
            border-color: var(--success);
            box-shadow: 0 0 0 3px var(--success-light);
        }

        .platform-section-head {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 20px;
            padding-bottom: 18px;
            border-bottom: 1px solid var(--border-color);
        }

        .platform-section-head .platform-icon {
            margin-bottom: 0;
            flex-shrink: 0;
        }

        .platform-summary {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .app-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .app-card {
            border: 1px solid var(--border-color);
            border-radius: 14px;
            padding: 16px 18px;
            background: var(--bg-neutral);
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .app-card:hover {
            border-color: #c7d2fe;
        }

        .app-card--featured {
            background: linear-gradient(135deg, #fafbff 0%, #f8fafc 100%);
            border-color: #c7d2fe;
        }

        .app-card.app-card--match {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px var(--primary-light);
        }

        .app-card-top {
            margin-bottom: 12px;
        }

        .app-title-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 6px;
        }

        .app-name {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            letter-spacing: -0.02em;
        }

        .app-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.55;
            margin-bottom: 10px;
        }

        .app-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }

        .app-badge {
            font-size: 0.65rem;
            font-weight: 500;
            padding: 3px 9px;
            border-radius: 20px;
            background: var(--bg-surface);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
        }

        .app-badge--hot { background: var(--primary-light); color: var(--primary); border-color: transparent; }
        .app-badge--beginner { background: #ecfdf5; color: #047857; border-color: transparent; }
        .app-badge--low { background: #fffbeb; color: #92400e; border-color: transparent; }
        .app-badge--deprecated { background: #f1f5f9; color: #64748b; border-color: transparent; }
        .app-badge--classic { background: #f1f5f9; color: #475569; border-color: transparent; }
        .app-badge--new { background: #ecfdf5; color: #047857; border-color: transparent; }
        .app-badge--free { background: #d1fae5; color: #065f46; border-color: transparent; }

        .platform-note {
            margin-top: 14px;
            padding: 12px 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.55;
            background: #fffbeb;
            border: 1px solid #fde68a;
            border-radius: 10px;
        }

        .platform-note code {
            display: block;
            margin-top: 8px;
            padding: 8px 10px;
            font-family: var(--font-mono);
            font-size: 0.7rem;
            background: var(--bg-surface);
            border-radius: 6px;
            word-break: break-all;
        }

        .cli-hint {
            margin-top: 10px;
            padding: 12px 14px;
            font-family: var(--font-mono);
            font-size: 0.72rem;
            line-height: 1.5;
            color: #e2e8f0;
            background: #0f172a;
            border: 1px solid #1e293b;
            border-radius: 8px;
            overflow-x: auto;
        }

        .app-card .pkg-list {
            margin-top: 4px;
            padding-top: 12px;
            border-top: 1px dashed var(--border-color);
        }

        .app-store-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 4px;
            padding: 9px 16px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--primary);
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            text-decoration: none;
            transition: background 0.2s, border-color 0.2s;
        }

        .app-store-btn:hover {
            background: var(--primary-light);
            border-color: #c7d2fe;
        }

        .platform-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 16px;
        }

        .icon-windows { background: #e8f4fd; color: #0078d4; }
        .icon-macos   { background: #f0f0f0; color: #1d1d1f; }
        .icon-android { background: #e6f4ea; color: #1e8e3e; }
        .icon-linux   { background: #fff8e1; color: #f9a825; }
        .icon-ios     { background: #fce4ec; color: #c2185b; }

        .platform-name {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .pkg-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin: 0;
            padding: 0;
        }

        .pkg-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 10px 12px;
            background: var(--bg-neutral);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
        }

        .pkg-row:hover {
            background: var(--bg-surface);
            border-color: #c7d2fe;
        }

        .pkg-row.pkg-row--match {
            border-color: var(--primary);
            background: var(--primary-light);
            box-shadow: 0 0 0 1px rgba(79, 70, 229, 0.15);
        }

        .pkg-row-info {
            display: flex;
            flex-direction: column;
            gap: 5px;
            min-width: 0;
        }

        .pkg-row-title {
            font-size: 0.84rem;
            font-weight: 500;
            color: var(--text-main);
        }

        .pkg-row-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 5px;
        }

        .pkg-tag {
            font-size: 0.68rem;
            font-weight: 500;
            padding: 2px 7px;
            border-radius: 5px;
            background: var(--bg-surface);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
        }

        .pkg-tag--arch {
            color: var(--primary);
            background: var(--primary-light);
            border-color: transparent;
        }

        .pkg-tag--size {
            font-family: var(--font-mono);
        }

        .pkg-tag--free {
            color: #065f46;
            background: #d1fae5;
            border-color: transparent;
        }

        .pkg-tag--hint {
            background: transparent;
            border: none;
            padding-left: 0;
        }

        .pkg-dl-btn {
            flex-shrink: 0;
            padding: 7px 14px;
            font-size: 0.78rem;
            font-weight: 500;
            color: #fff;
            background: var(--primary);
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-family: inherit;
            transition: background 0.2s, transform 0.15s;
            text-decoration: none;
            white-space: nowrap;
        }

        .pkg-dl-btn:hover {
            background: #4338ca;
            transform: translateY(-1px);
        }

        .pkg-dl-btn--link {
            background: var(--bg-surface);
            color: var(--primary);
            border: 1px solid var(--border-color);
        }

        .pkg-dl-btn--link:hover {
            background: var(--primary-light);
            border-color: #c7d2fe;
        }

        .meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--text-muted);
            background: var(--bg-neutral);
            padding: 3px 9px;
            border-radius: 6px;
        }

        .meta-tag i { font-size: 0.65rem; }

        .version-tag {
            font-family: var(--font-mono);
            font-size: 0.72rem;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 9px;
            border-radius: 6px;
        }

        .dl-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: 100%;
            padding: 11px 16px;
            border-radius: 10px;
            font-size: 0.88rem;
            font-weight: 500;
            cursor: pointer;
            text-decoration: none;
            transition: all 0.2s;
            border: none;
            margin-bottom: 10px;
        }

        .dl-btn-primary {
            background: var(--primary);
            color: white;
        }

        .dl-btn-primary:hover {
            background: #4338ca;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(79,70,229,0.3);
        }

        .dl-btn-secondary {
            background: var(--bg-neutral);
            color: var(--text-main);
        }

        .dl-btn-secondary:hover {
            background: #e2e8f0;
        }

        .alt-links {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .alt-link {
            font-size: 0.75rem;
            color: var(--text-muted);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.15s, color 0.15s;
        }

        .alt-link:hover { background: var(--bg-neutral); color: var(--text-main); }

        /* ── iOS special card ── */
        .ios-note {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 16px;
        }

        .ios-note a { color: var(--primary); text-decoration: none; font-weight: 500; }
        .ios-note a:hover { text-decoration: underline; }

        /* ── Changelog strip ── */
        .changelog-section {
            padding: 56px 0;
            border-top: 1px solid var(--border-color);
        }

        .section-header { margin-bottom: 40px; }

        .section-header h2 {
            font-size: 1.6rem;
            font-weight: 600;
            letter-spacing: -0.02em;
            margin-bottom: 6px;
        }

        .section-header p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .changelog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }

        .changelog-card {
            background: var(--bg-surface);
            border: 1.5px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
        }

        .changelog-card-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .changelog-platform-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
        }

        .changelog-card-header h4 {
            font-size: 0.9rem;
            font-weight: 500;
        }

        .changelog-card-header span {
            margin-left: auto;
            font-family: var(--font-mono);
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        .changelog-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .changelog-list li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .changelog-list li i {
            margin-top: 2px;
            font-size: 0.65rem;
            color: var(--success);
            flex-shrink: 0;
        }

        /* ── Install guide ── */
        .install-section {
            padding: 56px 0;
            border-top: 1px solid var(--border-color);
        }

        .install-tabs {
            display: flex;
            gap: 6px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .install-tab {
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            cursor: pointer;
            border: 1.5px solid var(--border-color);
            background: transparent;
            color: var(--text-muted);
            transition: all 0.15s;
        }

        .install-tab.active {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .install-tab:hover:not(.active) { background: var(--bg-neutral); color: var(--text-main); }

        .install-steps { display: none; }
        .install-steps.active { display: flex; flex-direction: column; gap: 16px; }

        .install-step {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .step-num {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .step-content h4 {
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 4px;
        }

        .step-content p {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .step-content code {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 0.75rem;
            background: var(--bg-neutral);
            padding: 2px 7px;
            border-radius: 4px;
            color: var(--text-main);
        }

        /* ── Alert modal ── */
        .custom-backdrop {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.35);
            backdrop-filter: blur(4px);
            z-index: 9999;
            align-items: center;
            justify-content: center;
        }
        .custom-backdrop.show { display: flex; }
        .custom-dialog {
            background: white;
            border-radius: 20px;
            padding: 36px 32px;
            max-width: 360px;
            width: calc(100% - 48px);
            text-align: center;
            box-shadow: 0 20px 60px rgba(0,0,0,0.15);
            animation: dialog-pop 0.25s cubic-bezier(0.34,1.56,0.64,1);
        }
        @keyframes dialog-pop { from { transform: scale(0.88); opacity: 0; } to { transform: scale(1); opacity: 1; } }
        .dialog-icon { font-size: 2.4rem; color: var(--success); margin-bottom: 14px; }
        .dialog-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
        .dialog-message { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 24px; }
        .dialog-close-btn {
            width: 100%;
            padding: 11px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
        }

        /* ── Responsive ── */
        @media (max-width: 768px) {
            .dl-hero { padding: 44px 0 36px; }
            .dl-hero h1 { font-size: 1.75rem; }

            .platform-section { padding: 18px 16px; }
            .platform-section-head { flex-wrap: wrap; gap: 8px; }

            .dl-page-layout { grid-template-columns: 1fr; }
            .dl-toc { display: none; }

            .dl-jump-bar { top: 68px; }

            /* Package rows: stack on small screen */
            .pkg-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .pkg-row-actions { width: 100%; display: flex; gap: 8px; flex-wrap: wrap; }
            .pkg-row-actions .btn-dl,
            .pkg-row-actions .btn-dl-secondary { flex: 1; text-align: center; justify-content: center; }

            .changelog-grid { grid-template-columns: 1fr; }

            /* Install section code blocks */
            .install-section pre { font-size: 0.75rem; }
            .cli-hint { font-size: 0.75rem; }
        }

        @media (max-width: 480px) {
            .dl-hero { padding: 32px 0 28px; }
            .dl-hero h1 { font-size: 1.5rem; }
            .dl-hero p { font-size: 0.85rem; }
            .dl-hero-badge { font-size: 0.72rem; }

            .dl-jump-inner { gap: 4px; }
            .dl-jump-item { padding: 7px 10px; font-size: 0.75rem; gap: 4px; }
            .dl-jump-item i { font-size: 0.85rem; }

            .app-card { padding: 14px 14px; }
            .app-card-meta { flex-wrap: wrap; }
        }