/* ── CSS Variables ── */
        :root {
            --primary: #2563eb;
            --bg: #f5f5f5;
            --surface: #fff;
            --border: #e5e5e5;
            --border-dash: #d4d4d4;
            --text: #1a1a1a;
            --text-2: #333;
            --text-3: #666;
            --text-4: #999;
            --hover: #fafafa;
            --active: #f0f0f0;
            --alt: #f9f9f9;
            --progress-bg: #e5e5e5;
            --spinner-bd: #e5e5e5;
            --shadow: rgba(0,0,0,0.08);
        }

        [data-theme="dark"] {
            --bg: #141414;
            --surface: #1f1f1f;
            --border: #2e2e2e;
            --border-dash: #3a3a3a;
            --text: #f0f0f0;
            --text-2: #d0d0d0;
            --text-3: #888;
            --text-4: #555;
            --hover: #282828;
            --active: #333;
            --alt: #252525;
            --progress-bg: #333;
            --spinner-bd: #333;
            --shadow: rgba(0,0,0,0.3);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: var(--bg);
            color: var(--text);
            min-height: 100vh;
            max-width: 1440px;
            margin: 0 auto;
            transition: background 0.15s, color 0.15s;
        }

        /* ── Header ── */
        .header {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .logo {
            font-size: 18px;
            font-weight: 700;
            white-space: nowrap;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo::before {
            content: '';
            display: inline-block;
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            border-radius: 6px;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='white' viewBox='0 0 24 24'%3E%3Cpath d='M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z'/%3E%3C/svg%3E");
            background-size: 18px;
            background-repeat: no-repeat;
            background-position: center;
        }
        .logo span { color: var(--text-3); font-weight: 400; }

        .header-center {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .global-progress {
            display: none;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-3);
        }
        .global-progress.visible { display: flex; }

        .global-progress-bar {
            width: 100px;
            height: 4px;
            background: var(--progress-bg);
            border-radius: 2px;
            overflow: hidden;
        }
        .global-progress-fill {
            height: 100%;
            background: var(--text);
            border-radius: 2px;
            transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .header-actions { display: flex; gap: 6px; align-items: center; }

        /* ── Main ── */
        .main { max-width: 1100px; margin: 0 auto; padding: 20px; }

        /* ── Upload ── */
        .upload-section {
            background: var(--surface);
            border: 1.5px dashed var(--border-dash);
            border-radius: 12px;
            padding: 32px 40px;
            text-align: center;
            cursor: pointer;
            transition: border-color 0.1s, background 0.1s;
            margin-bottom: 16px;
        }
        .upload-section:hover, .upload-section.dragover {
            border-color: var(--text);
            background: var(--hover);
        }

        .upload-icon {
            width: 48px; height: 48px;
            margin: 0 auto 12px;
            background: var(--active);
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
        }
        .upload-icon svg { width: 24px; height: 24px; color: var(--text-3); }
        .upload-text { font-size: 18px; font-weight: 600; color: var(--text-2); }
        .upload-text strong { color: var(--text); }
        .upload-hint { font-size: 13px; color: var(--text-4); margin-top: 6px; }

        /* ── Action Bar ── */
        .action-bar {
            display: none;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            padding: 8px 0;
            margin-bottom: 8px;
        }
        .action-bar.visible { display: flex; }

        /* ── Results Grid ── */
        .results-grid { display: flex; flex-direction: column; gap: 8px; }

        /* ── Result Card ── */
        .result-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
            transition: box-shadow 0.1s;
        }
        .result-card:hover { box-shadow: 0 3px 10px var(--shadow); }
        .result-card.processing { opacity: 0.85; }

        .card-header {
            padding: 7px 12px;
            background: var(--alt);
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            user-select: none;
            transition: background 0.08s;
            gap: 8px;
        }
        .result-card.collapsed .card-header { border-bottom: none; }
        .card-header:hover { background: var(--active); }
        .card-header:active { background: var(--active); filter: brightness(0.95); }

        .card-title {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 500;
            overflow: hidden;
            flex: 1;
            min-width: 0;
        }
        .card-thumb {
            width: 24px; height: 24px;
            object-fit: cover;
            border-radius: 3px;
            background: var(--active);
            flex-shrink: 0;
        }
        .card-name {
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .card-meta { display: flex; align-items: center; gap: 5px; flex-shrink: 0; }

        .card-status {
            font-size: 11px;
            padding: 2px 7px;
            border-radius: 10px;
            background: var(--active);
            color: var(--text-3);
            white-space: nowrap;
        }
        .card-status.done { background: #e6f4ea; color: #137333; }
        .card-status.error { background: #fce8e6; color: #c5221f; }
        [data-theme="dark"] .card-status.done { background: #0d2b14; color: #4caf72; }
        [data-theme="dark"] .card-status.error { background: #2b0d0b; color: #e57373; }

        .card-toggle {
            width: 16px; height: 16px;
            display: flex; align-items: center; justify-content: center;
            color: var(--text-4);
            transition: transform 0.12s cubic-bezier(0.4, 0, 0.2, 1);
            flex-shrink: 0;
        }
        .result-card.collapsed .card-toggle { transform: rotate(-90deg); }

        .card-remove {
            width: 24px; height: 24px;
            border: none; background: none;
            cursor: pointer; color: var(--text-4);
            display: flex; align-items: center; justify-content: center;
            border-radius: 4px; flex-shrink: 0;
            transition: background 0.08s, color 0.08s;
        }
        .card-remove:hover { background: var(--active); color: var(--text-3); }
        .card-remove:active { transform: scale(0.88); transition: transform 0.05s; }

        /* ── Card Body ── grid-template-rows trick: GPU-friendly, no rubber-band effect ── */
        .card-body-outer {
            display: grid;
            grid-template-rows: 1fr;
            transition: grid-template-rows 0.14s cubic-bezier(0.4, 0, 0.2, 1),
                        opacity 0.12s ease;
            opacity: 1;
        }
        .result-card.collapsed .card-body-outer {
            grid-template-rows: 0fr;
            opacity: 0;
        }
        .card-body {
            display: flex;
            overflow: hidden;
            min-height: 0;
        }

        .card-image {
            flex: 0 0 110px;
            background: var(--alt);
            border-right: 1px solid var(--border);
            display: flex; align-items: center; justify-content: center;
            padding: 6px;
            cursor: zoom-in;
            transition: background 0.08s;
        }
        .card-image:hover { background: var(--active); }
        .card-image:active { filter: brightness(0.93); transition: filter 0.05s; }
        .card-image img { max-width: 100%; max-height: 110px; object-fit: contain; border-radius: 3px; }

        .card-text {
            flex: 1;
            padding: 8px 10px;
            display: flex;
            flex-direction: column;
            min-width: 0;
            gap: 6px;
        }

        .card-textarea {
            display: block;
            width: 100%;
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 6px 8px;
            font-family: "微软雅黑", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
            font-size: 14px;
            line-height: 1.6;
            resize: vertical;
            background: var(--alt);
            color: var(--text);
            min-height: 80px;
            flex: 1;
        }
        .card-textarea:focus { outline: none; border-color: var(--text-3); background: var(--surface); transition: none; }

        .card-footer {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .card-actions { display: flex; gap: 6px; align-items: center; }
        .card-actions-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
        .char-count { font-size: 10px; color: var(--text-4); white-space: nowrap; }

        /* Download Dropdown */
        .download-dropdown {
            position: relative;
            display: inline-flex;
        }
        .download-dropdown .btn {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .download-buttons {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .btn-download {
            padding: 2px 4px;
            font-size: 8px;
            font-weight: 600;
            min-width: 25px;
            border-radius: 2px;
            border: 1px solid var(--border);
            background: var(--surface);
            color: var(--text-3);
            cursor: pointer;
            transition: all 0.15s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 2px;
        }
        .btn-download:hover {
            background: var(--primary);
            color: #000;
            border-color: var(--primary);
            box-shadow: 0 2px 4px rgba(0,0,0,0.15);
        }
        .download-menu {
            position: absolute;
            top: 100%;
            left: 0;
            margin-top: 4px;
            min-width: 200px;
            max-height: 70vh;
            overflow-y: auto;
            background: var(--surface);
            border: 1px solid var(--border-dash);
            border-radius: 6px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            z-index: 100;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-8px);
            transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
        }
        .download-menu.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .download-menu-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            cursor: pointer;
            font-size: 13px;
            color: var(--text-2);
            transition: background 0.1s;
        }
        .download-menu-item:first-child {
            border-radius: 6px 6px 0 0;
        }
        .download-menu-item:last-child {
            border-radius: 0 0 6px 6px;
        }
        .download-menu-item:hover {
            background: var(--hover);
        }
        .download-menu-item .format-icon {
            font-size: 14px;
            width: 20px;
            text-align: center;
        }
        .download-menu-divider {
            height: 1px;
            background: var(--border-dash);
            margin: 4px 0;
        }

        /* ── Buttons ── */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 9px 18px;
            border: 1px solid var(--border-dash);
            border-radius: 5px;
            background: var(--surface);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
            cursor: pointer;
            transition: background 0.08s, border-color 0.08s, color 0.08s, opacity 0.08s, transform 0.06s;
            white-space: nowrap;
            transform-origin: center;
        }
        .btn:hover { background: var(--hover); border-color: var(--text-3); }
        .btn:not(:disabled):active { transform: scale(0.96); }
        .btn:disabled { opacity: 0.5; cursor: not-allowed; }
        .btn-primary:disabled { background: var(--primary); opacity: 0.5; color: #fff; }
        .btn svg { width: 12px; height: 12px; flex-shrink: 0; }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover { opacity: 0.9; background: var(--primary); }
        .btn-icon { padding: 6px 8px; }

        /* ── Start Over Buttons ── */
        .start-over-container {
            display: flex;
            justify-content: flex-end;
            margin: 24px 0;
        }

        .btn-start-over {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .btn-start-over:hover {
            background: #4a4a4a !important;
            opacity: 1;
        }

        .btn-start-over:active {
            transform: scale(0.98);
        }

        .btn-start-over svg {
            width: 16px;
            height: 16px;
        }

        /* ── Empty State ── */
        .empty-state { text-align: center; padding: 50px 24px; color: var(--text-4); }
        .empty-icon { font-size: 44px; margin-bottom: 12px; opacity: 0.5; }

        /* ── Progress Bar ── */
        .progress-bar { height: 3px; background: var(--progress-bg); overflow: hidden; }
        .progress-fill { height: 100%; background: var(--text); transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1); }

        /* ── Image Modal ── */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1500;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.12s;
            padding: 20px;
        }
        .modal-overlay.visible { opacity: 1; pointer-events: auto; }

        .modal-img {
            max-width: 100%;
            max-height: 90vh;
            object-fit: contain;
            border-radius: 6px;
            box-shadow: 0 12px 48px rgba(0,0,0,0.6);
        }
        .modal-close {
            position: fixed;
            top: 16px; right: 20px;
            width: 36px; height: 36px;
            border: none;
            background: rgba(255,255,255,0.15);
            color: #fff;
            font-size: 18px;
            cursor: pointer;
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            transition: background 0.08s, transform 0.06s;
            line-height: 1;
        }
        .modal-close:hover { background: rgba(255,255,255,0.3); }
        .modal-close:active { transform: scale(0.9); }

        /* ── Toast ── */
        .toast {
            position: fixed;
            bottom: 24px; right: 24px;
            padding: 10px 18px;
            background: var(--text);
            color: var(--surface);
            border-radius: 8px;
            font-size: 13px;
            opacity: 0;
            transform: translateY(6px);
            transition: opacity 0.12s, transform 0.12s cubic-bezier(0.2, 0, 0.2, 1);
            z-index: 2000;
            pointer-events: none;
        }
        .toast.visible { opacity: 1; transform: translateY(0); }
        .toast.success { background: #137333; color: #fff; }
        .toast.error { background: #c5221f; color: #fff; }

        /* ── Spinner ── */
        .spinner {
            width: 20px; height: 20px;
            border: 2px solid var(--spinner-bd);
            border-top-color: var(--text);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
            flex-shrink: 0;
        }
        @keyframes spin { to { transform: rotate(360deg); } }

        /* ── Accessibility: respect system motion preference ── */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
        }

        #fileInput { display: none; }

        /* ── Hero Section ── */
        .hero-section {
            text-align: center;
            padding: 32px 20px 24px;
        }

        .hero-free-tag {
            display: inline-block;
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            color: white;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
            animation: pulse-tag 2s ease-in-out infinite;
            box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
        }

        @keyframes pulse-tag {
            0%, 100% { box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3); }
            50% { box-shadow: 0 4px 25px rgba(16, 185, 129, 0.5); }
        }

        .hero-title {
            font-size: 32px;
            font-weight: 800;
            margin: 0 0 12px;
            color: var(--text-1);
            line-height: 1.2;
        }
        .hero-highlight {
            color: #10b981;
        }
        .hero-subtitle {
            font-size: 14px;
            color: var(--text-3);
            margin: 0 0 24px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.5;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .stat-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
        }
        .stat-value {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
        }
        .stat-label {
            font-size: 12px;
            color: var(--text-4);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .stat-divider {
            width: 1px;
            height: 32px;
            background: var(--border);
        }

        /* ── Section Titles ── */
        .section-title {
            font-size: 24px;
            font-weight: 700;
            text-align: center;
            margin: 48px 0 24px;
            color: var(--text-1);
        }

        /* ── Features Section ── */
        .features-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .feature-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        .feature-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.1);
        }
        .feature-icon {
            font-size: 36px;
            margin-bottom: 12px;
        }
        .feature-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text-1);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.5;
        }

        /* ── How to Use Section ── */
        .howto-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .steps-container {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .step {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 20px;
        }
        .step-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
        }
        .step-content h3 {
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 6px;
            color: var(--text-1);
        }
        .step-content p {
            font-size: 14px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.5;
        }

        /* ── FAQ Section ── */
        .faq-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto 48px;
        }

        /* ── Related Tools ── */
        .related-tools {
            padding: 0 20px;
            max-width: 1000px;
            margin: 0 auto 48px;
        }
        .related-tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 12px;
        }
        .related-tool-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding: 20px 16px;
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            text-decoration: none;
            color: var(--text-1);
            transition: border-color 0.15s, box-shadow 0.15s;
        }
        .related-tool-card:hover {
            border-color: var(--primary);
            box-shadow: 0 4px 12px var(--shadow);
        }
        .related-tool-icon {
            font-size: 28px;
            margin-bottom: 8px;
        }
        .related-tool-name {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .related-tool-desc {
            font-size: 12px;
            color: var(--text-3);
        }

        /* ── Trust Section ── */
        .trust-section {
            padding: 32px 20px;
            background: var(--bg-2);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            margin-bottom: 48px;
        }
        .trust-badges {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 32px;
            flex-wrap: wrap;
            max-width: 1100px;
            margin: 0 auto;
        }
        .trust-badge {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 4px;
            padding: 12px 16px;
            border-radius: 12px;
            background: var(--surface);
            border: 1px solid var(--border);
            min-width: 140px;
        }
        .trust-badge-highlight {
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            border-color: transparent;
            animation: badge-glow 3s ease-in-out infinite;
        }
        .trust-badge-highlight .trust-text,
        .trust-badge-highlight .trust-sub {
            color: white;
        }
        .trust-badge-highlight .trust-icon {
            font-size: 28px;
        }
        @keyframes badge-glow {
            0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
            50% { box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3); }
        }
        .trust-icon {
            font-size: 24px;
        }
        .trust-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-1);
        }
        .trust-sub {
            font-size: 12px;
            color: var(--text-3);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
        }
        .faq-item summary {
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 500;
            color: var(--text-1);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: background 0.2s ease;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 20px;
            color: var(--text-4);
            transition: transform 0.2s ease;
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-item summary:hover {
            background: var(--bg-3);
        }
        .faq-item p {
            padding: 0 20px 16px;
            margin: 0;
            font-size: 14px;
            color: var(--text-3);
            line-height: 1.6;
        }

        /* ── Footer ── */
        .footer {
            padding: 48px 20px 24px;
            border-top: 1px solid var(--border);
            margin-top: 0;
        }
        .footer-content {
            max-width: 1000px;
            margin: 0 auto 32px;
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        .footer-brand {
            flex: 1;
            min-width: 250px;
            max-width: 350px;
        }
        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 12px;
            color: var(--text-1);
        }
        .footer-brand p {
            margin: 0;
            color: var(--text-3);
            font-size: 14px;
            line-height: 1.6;
            text-align: left;
        }
        .footer-links {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }
        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            margin: 0 0 4px;
            color: var(--text-1);
        }
        .footer-col a {
            font-size: 13px;
            color: var(--text-3);
            text-decoration: none;
            transition: color 0.15s;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .footer-bottom p {
            margin: 0;
            color: var(--text-3);
            font-size: 13px;
            line-height: 1.6;
        }
        .footer-bottom p:first-child {
            font-weight: 500;
            color: var(--text-2);
            margin-bottom: 4px;
        }

        /* ── Section Subtitle ── */
        .section-subtitle {
            text-align: center;
            font-size: 16px;
            color: var(--text-3);
            margin: -16px 0 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ── Tech Specs ── */
        .tech-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .specs-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
        }
        .spec-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .spec-label {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--text-4);
            font-weight: 500;
        }
        .spec-value {
            font-size: 14px;
            color: var(--text-1);
            font-weight: 500;
        }

        /* ── Use Cases ── */
        .usecases-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .usecases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 16px;
        }
        .usecase-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 20px;
        }
        .usecase-card h3 {
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text-1);
        }
        .usecase-card p {
            font-size: 13px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.5;
        }

        /* ── Language Section ── */
        .lang-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .lang-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 16px;
        }
        .lang-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 20px;
        }
        .lang-card h3 {
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 12px;
            color: var(--text-1);
        }
        .lang-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .lang-card li {
            font-size: 13px;
            color: var(--text-3);
            padding: 4px 0;
            border-bottom: 1px solid var(--border);
        }
        .lang-card li:last-child {
            border-bottom: none;
        }

        /* ── Preprocessing Section ── */
        .preprocess-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .preprocess-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .preprocess-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 20px;
            text-align: center;
        }
        .preprocess-icon {
            font-size: 32px;
            margin-bottom: 12px;
        }
        .preprocess-card h3 {
            font-size: 14px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text-1);
        }
        .preprocess-card p {
            font-size: 13px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.5;
        }

        /* ── Output Section ── */
        .output-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .output-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .output-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 20px;
            text-align: center;
        }
        .output-icon {
            font-size: 32px;
            margin-bottom: 12px;
        }
        .output-card h3 {
            font-size: 14px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text-1);
        }
        .output-card p {
            font-size: 13px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.5;
        }

        /* ── Accuracy Tips Section ── */
        .accuracy-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 16px;
        }
        .tip-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: bold;
        }
        .tip-content h3 {
            font-size: 14px;
            font-weight: 600;
            margin: 0 0 6px;
            color: var(--text-1);
        }
        .tip-content p {
            font-size: 13px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.5;
        }

        /* ── Privacy Section ── */
        .privacy-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .privacy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .privacy-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 20px;
            text-align: center;
        }
        .privacy-icon {
            font-size: 32px;
            margin-bottom: 12px;
        }
        .privacy-card h3 {
            font-size: 14px;
            font-weight: 600;
            margin: 0 0 8px;
            color: var(--text-1);
        }
        .privacy-card p {
            font-size: 13px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.5;
        }

        /* ── API Section ── */
        .api-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .api-content {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        @media (max-width: 700px) {
            .api-content {
                grid-template-columns: 1fr;
            }
        }
        .api-info h3 {
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 12px;
            color: var(--text-1);
        }
        .api-info p {
            font-size: 14px;
            color: var(--text-3);
            margin: 0 0 16px;
            line-height: 1.5;
        }
        .code-block {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 10px 14px;
            margin-bottom: 10px;
            overflow-x: auto;
        }
        .code-block code {
            font-family: 'SF Mono', Monaco, Consolas, monospace;
            font-size: 12px;
            color: var(--text-2);
        }
        .api-features h3 {
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 12px;
            color: var(--text-1);
        }
        .api-features ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .api-features li {
            font-size: 14px;
            color: var(--text-3);
            padding: 6px 0;
            padding-left: 20px;
            position: relative;
        }
        .api-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        /* ── Pain Points Section ── */
        .pain-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .pain-intro {
            text-align: center;
            margin-bottom: 32px;
        }
        .pain-intro h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-1);
            margin: 0 0 8px;
        }
        .pain-intro p {
            font-size: 15px;
            color: var(--text-3);
            margin: 0;
            line-height: 1.6;
        }
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .pain-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .pain-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px var(--shadow);
        }
        .pain-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, #fef3c7, #fde68a);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 16px;
        }
        .pain-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-1);
            margin: 0 0 10px;
        }
        .pain-card p {
            font-size: 14px;
            color: var(--text-3);
            margin: 0 0 16px;
            line-height: 1.5;
        }
        .pain-solution {
            background: #f0fdf4;
            border: 1px solid #bbf7d0;
            border-radius: 8px;
            padding: 12px;
        }
        [data-theme="dark"] .pain-solution {
            background: #052e16;
            border-color: #166534;
        }
        .pain-solution-label {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            color: #16a34a;
            margin-bottom: 6px;
            letter-spacing: 0.5px;
        }
        .pain-solution p {
            font-size: 13px;
            color: var(--text-2);
            margin: 0;
            line-height: 1.5;
        }

        /* ── Use Cases Stories ── */
        .stories-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .stories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }
        .story-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            position: relative;
            overflow: hidden;
        }
        .story-card::before {
            content: '"';
            position: absolute;
            top: 10px;
            right: 20px;
            font-size: 80px;
            color: var(--border);
            font-family: Georgia, serif;
            line-height: 1;
        }
        .story-quote {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
            margin-bottom: 16px;
            font-style: italic;
        }
        .story-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .story-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 600;
            font-size: 14px;
        }
        .story-info h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-1);
            margin: 0 0 2px;
        }
        .story-info span {
            font-size: 12px;
            color: var(--text-4);
        }
        .story-tag {
            display: inline-block;
            padding: 3px 8px;
            background: var(--primary);
            color: #fff;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 500;
            margin-top: 8px;
        }

        /* ── Comparison Section ── */
        .compare-section {
            padding: 0 20px;
            max-width: 1100px;
            margin: 0 auto 80px;
        }
        .compare-table {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
        }
        .compare-row {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            border-bottom: 1px solid var(--border);
        }
        .compare-row:last-child {
            border-bottom: none;
        }
        .compare-header {
            background: var(--alt);
            font-weight: 600;
            font-size: 14px;
        }
        .compare-header .compare-cell {
            padding: 14px 16px;
            color: var(--text-1);
        }
        .compare-cell {
            padding: 14px 16px;
            font-size: 13px;
            color: var(--text-3);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .compare-cell:first-child {
            font-weight: 500;
            color: var(--text-2);
        }
        .compare-check {
            color: #16a34a;
            font-weight: bold;
        }
        .compare-cross {
            color: #dc2626;
            font-weight: bold;
        }
        .compare-ours {
            background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
            font-weight: 700;
            color: #065f46;
        }
        [data-theme="dark"] .compare-ours {
            background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
            color: #a7f3d0;
        }

        /* ── Stats Section ── */
        .stats-section {
            padding: 40px 20px;
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            color: #fff;
            text-align: center;
        }
        .stats-grid {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 60px;
            flex-wrap: wrap;
            max-width: 1100px;
            margin: 0 auto;
        }
        .stat-box {
            text-align: center;
        }
        .stat-number {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.1;
        }
        .stat-desc {
            font-size: 14px;
            opacity: 0.9;
            margin-top: 4px;
        }

        @media (max-width: 600px) {
            .hero-title { font-size: 26px; }
            .hero-subtitle { font-size: 14px; }
            .hero-stats { gap: 16px; }
            .stat-divider { display: none; }
            .section-title { font-size: 20px; margin: 32px 0 16px; }
            .section-subtitle { font-size: 14px; margin-bottom: 24px; }
            .feature-card { padding: 16px; }
            .step { padding: 16px; }
            .step-number { width: 32px; height: 32px; font-size: 16px; }
            .specs-grid { padding: 16px; }
            .footer-content { flex-direction: column; gap: 32px; }
            .footer-links { gap: 24px; }
            .trust-badges { gap: 20px; flex-direction: column; }
            .trust-badge { min-width: 100%; }
            .trust-badge-highlight { order: -1; }
        }