:root {
            color-scheme: dark;
            /* 科技感配色变量 */
            --bg-primary: #0a0e27;
            --bg-secondary: #1a1f3a;
            --bg-tertiary: #252b45;
            --neon-blue: #00d4ff;
            --neon-purple: #a855f7;
            --neon-green: #10b981;
            --neon-cyan: #06b6d4;
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --glow-blue: 0 0 20px rgba(0, 212, 255, 0.4), 0 0 40px rgba(0, 212, 255, 0.2);
            --glow-purple: 0 0 20px rgba(168, 85, 247, 0.4), 0 0 40px rgba(168, 85, 247, 0.2);
            --glow-green: 0 0 20px rgba(16, 185, 129, 0.4), 0 0 40px rgba(16, 185, 129, 0.2);
        }
        * {
            box-sizing: border-box;
        }
        body {
            margin: 0;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            background: 
                radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(168, 85, 247, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
                linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0a0e27 100%);
            background-attachment: fixed;
            color: var(--text-primary);
            font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            position: relative;
        }
        /* 网格背景效果 */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
            background-size: 50px 50px;
            pointer-events: none;
            z-index: 0;
        }
        main.app {
            width: min(1200px, 94vw);
            padding: 56px 0 72px;
            position: relative;
            z-index: 1;
        }
        .hero {
            text-align: center;
            margin-bottom: 36px;
            animation: fadeInUp 0.6s ease-out;
        }
        .hero h1 {
            font-size: clamp(30px, 4vw, 48px);
            margin: 0;
            background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 50%, var(--neon-green) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
            font-weight: 800;
            text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
            filter: drop-shadow(0 0 20px rgba(168, 85, 247, 0.3));
        }
        .hero p {
            margin: 16px auto 0;
            max-width: 680px;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 16px;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .recent-section {
            margin-top: 36px;
            padding: 24px;
            border-radius: 22px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            background: rgba(26, 31, 58, 0.6);
            backdrop-filter: blur(20px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), var(--glow-blue);
            transition: all 0.3s ease;
        }
        .recent-section:hover {
            border-color: rgba(0, 212, 255, 0.4);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), var(--glow-blue);
            transform: translateY(-2px);
        }
        .recent-section h3 {
            margin: 0;
            font-size: 18px;
            color: var(--text-primary);
            font-weight: 700;
        }
        .recent-section p {
            margin: 10px 0 18px;
            color: var(--text-secondary);
            font-size: 14px;
        }
        .recent-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 12px;
        }
        .recent-card {
            display: block;
            border: 1px solid rgba(0, 212, 255, 0.15);
            border-radius: 16px;
            padding: 16px;
            background: rgba(37, 43, 69, 0.5);
            backdrop-filter: blur(10px);
            text-align: left;
            cursor: pointer;
            transition: all 0.25s ease;
            color: inherit;
            text-decoration: none;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .recent-card:hover,
        .recent-card:focus-visible {
            outline: none;
            transform: translateY(-4px) scale(1.02);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 212, 255, 0.3);
            border-color: rgba(0, 212, 255, 0.5);
            background: rgba(37, 43, 69, 0.7);
        }
        .recent-title {
            display: block;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .recent-meta {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
        }
        .flow-steps {
            display: flex;
            gap: 18px;
            justify-content: center;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .flow-step {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 18px;
            border-radius: 999px;
            background: rgba(37, 43, 69, 0.5);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 212, 255, 0.1);
            color: var(--text-muted);
            font-weight: 500;
            transition: all 0.25s ease;
        }
        .flow-step .index {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(148, 163, 184, 0.2);
            font-size: 15px;
            font-weight: 600;
            transition: all 0.25s ease;
        }
        .flow-step.active {
            background: rgba(0, 212, 255, 0.15);
            border-color: rgba(0, 212, 255, 0.3);
            color: var(--neon-blue);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
        }
        .flow-step.active .index {
            background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
            color: #fff;
            box-shadow: var(--glow-blue);
        }
        .status-bar {
            margin: 0 auto 24px;
            width: min(980px, 90vw);
            padding: 14px 18px;
            border-radius: 14px;
            font-weight: 500;
            display: none;
        }
        .status-bar[data-tone="info"] {
            background: rgba(0, 212, 255, 0.15);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: var(--neon-blue);
            box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
        }
        .status-bar[data-tone="success"] {
            background: rgba(16, 185, 129, 0.15);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(16, 185, 129, 0.3);
            color: var(--neon-green);
            box-shadow: 0 4px 16px rgba(16, 185, 129, 0.2);
        }
        .status-bar[data-tone="danger"] {
            background: rgba(239, 68, 68, 0.15);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(239, 68, 68, 0.3);
            color: #fca5a5;
            box-shadow: 0 4px 16px rgba(239, 68, 68, 0.2);
        }
        .status-bar.show {
            display: block;
        }
        .step-card {
            display: none;
            background: rgba(26, 31, 58, 0.6);
            border-radius: 24px;
            padding: 32px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.2);
            backdrop-filter: blur(20px);
            width: min(1200px, 94vw);
            margin: 0 auto 28px;
            animation: fadeInUp 0.4s ease-out;
        }
        .step-card.active {
            display: block;
        }
        .requirement-form {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .requirement-label {
            font-weight: 600;
            color: var(--text-primary);
            display: block;
            margin-bottom: 8px;
            font-size: 16px;
            text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
        }
        .manual-entry {
            margin-top: -6px;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            color: var(--text-secondary);
            font-size: 14px;
        }
        .manual-entry .text-link {
            color: var(--neon-blue);
            text-decoration: none;
            font-weight: 600;
            transition: all 0.2s ease;
        }
        .manual-entry .text-link:hover {
            text-decoration: underline;
            text-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
            color: var(--neon-cyan);
        }
        .input-stack {
            position: relative;
            display: flex;
            align-items: stretch;
            gap: 18px;
        }
        .rich-input {
            flex: 1;
            min-height: 220px;
            padding: 18px 22px;
            border-radius: 22px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            background: rgba(26, 31, 58, 0.6);
            backdrop-filter: blur(10px);
            font-size: 16px;
            line-height: 1.7;
            transition: all 0.25s ease;
            outline: none;
            white-space: pre-wrap;
            word-break: break-word;
            overflow: auto;
            color: var(--text-primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .rich-input:focus {
            border-color: var(--neon-blue);
            box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.15), var(--glow-blue);
            background: rgba(26, 31, 58, 0.8);
        }
        .rich-input::placeholder {
            color: var(--text-muted);
        }
        .rich-input.is-empty::before {
            content: attr(data-placeholder);
            color: #94a3b8;
        }
        .rich-input table {
            border-collapse: collapse;
            width: 100%;
        }
        .rich-input table td,
        .rich-input table th {
            border: 1px solid rgba(148, 163, 184, 0.6);
            padding: 8px 10px;
        }
        .next-button {
            min-width: 150px;
            border-radius: 20px;
            border: 1px solid rgba(0, 212, 255, 0.3);
            cursor: pointer;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(168, 85, 247, 0.2) 100%);
            backdrop-filter: blur(10px);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 0 26px;
            transition: all 0.25s ease;
            box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
            position: relative;
            overflow: hidden;
        }
        .next-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s ease;
        }
        .next-button:hover::before {
            left: 100%;
        }
        .next-button svg {
            width: 18px;
            height: 18px;
            filter: drop-shadow(0 0 4px rgba(0, 212, 255, 0.6));
        }
        .next-button:hover:not([disabled]) {
            transform: translateX(4px) translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 212, 255, 0.4), var(--glow-blue);
            border-color: rgba(0, 212, 255, 0.6);
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.3) 0%, rgba(168, 85, 247, 0.3) 100%);
        }
        .next-button:active:not([disabled]) {
            transform: translateX(2px) translateY(0);
        }
        .next-button[disabled] {
            opacity: 0.4;
            cursor: not-allowed;
            box-shadow: none;
            border-color: rgba(148, 163, 184, 0.2);
        }
        .step-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 24px;
            margin-bottom: 24px;
        }
        .step-header h2 {
            margin: 0;
            font-size: 24px;
            color: var(--text-primary);
            font-weight: 700;
            background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .step-header p {
            margin: 8px 0 0;
            color: var(--text-secondary);
        }
        .step-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn {
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 999px;
            padding: 12px 22px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
            backdrop-filter: blur(10px);
        }
        .btn.primary {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(168, 85, 247, 0.2) 100%);
            color: #fff;
            box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
        }
        .btn.ghost {
            background: rgba(37, 43, 69, 0.5);
            color: var(--text-secondary);
            border-color: rgba(148, 163, 184, 0.2);
        }
        .btn:hover:not([disabled]) {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3), var(--glow-blue);
            border-color: rgba(0, 212, 255, 0.5);
        }
        .btn.primary:hover:not([disabled]) {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.3) 0%, rgba(168, 85, 247, 0.3) 100%);
        }
        .btn.ghost:hover:not([disabled]) {
            background: rgba(37, 43, 69, 0.7);
            color: var(--text-primary);
        }
        .btn[disabled] {
            opacity: 0.4;
            cursor: not-allowed;
            box-shadow: none;
        }
        .editor-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 20px;
        }
        #markdown-editor {
            min-height: 420px;
            border-radius: 18px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            background: rgba(10, 14, 39, 0.8);
            color: var(--text-primary);
            font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
            font-size: 14px;
            line-height: 1.7;
            padding: 18px 20px;
            resize: vertical;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3), inset 0 0 0 1px rgba(0, 212, 255, 0.1);
            transition: all 0.25s ease;
        }
        #markdown-editor:focus {
            outline: none;
            border-color: var(--neon-blue);
            box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.15), var(--glow-blue), inset 0 0 0 1px rgba(0, 212, 255, 0.2);
            background: rgba(10, 14, 39, 0.95);
        }
        .markdown-preview {
            border-radius: 18px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            background: rgba(26, 31, 58, 0.6);
            backdrop-filter: blur(10px);
            padding: 22px;
            max-height: 520px;
            overflow: auto;
            color: var(--text-primary);
            line-height: 1.7;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .markdown-preview h1,
        .markdown-preview h2,
        .markdown-preview h3 {
            color: var(--text-primary);
        }
        .markdown-preview p {
            color: var(--text-secondary);
        }
        .markdown-preview h1,
        .markdown-preview h2,
        .markdown-preview h3 {
            margin-top: 1.4em;
            margin-bottom: 0.6em;
        }
        .markdown-preview p {
            margin: 0.6em 0;
        }
        .mind-editor {
            border-radius: 22px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            background: rgba(26, 31, 58, 0.6);
            backdrop-filter: blur(10px);
            padding: 0;
            min-height: 420px;
            overflow: hidden;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), var(--glow-blue);
        }
        #mind-container {
            width: 100%;
            height: 560px;
            min-height: 360px;
            border-radius: inherit;
            background: rgba(10, 14, 39, 0.8);
            box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.1);
            overflow: hidden;
        }
        .selection-area {
            border: 2px solid rgba(99, 102, 241, 0.8) !important;
            background: rgba(99, 102, 241, 0.12) !important;
            box-shadow: 0 10px 30px rgba(79, 70, 229, 0.18);
            border-radius: 12px;
        }
        .mindmap-toolbar {
            position: absolute;
            top: 18px;
            right: 18px;
            z-index: 5;
        }
        svg#mindmap-svg {
            width: 100%;
            height: 540px;
        }
        .loading-mask {
            position: fixed;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(10, 14, 39, 0.8);
            backdrop-filter: blur(10px);
            z-index: 99;
            color: var(--text-primary);
            font-size: 18px;
            font-weight: 500;
            gap: 14px;
            animation: fadeIn 0.3s ease-out;
        }
        .loading-mask.hidden {
            display: none;
        }
        .spinner {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 3px solid rgba(0, 212, 255, 0.2);
            border-top-color: var(--neon-blue);
            animation: spin 0.8s linear infinite;
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        /* 脉冲动画 */
        @keyframes pulse {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.8;
                transform: scale(1.05);
            }
        }
        /* 发光动画 */
        @keyframes glow {
            0%, 100% {
                box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
            }
            50% {
                box-shadow: 0 0 30px rgba(0, 212, 255, 0.6), 0 0 50px rgba(0, 212, 255, 0.3);
            }
        }
        footer {
            text-align: center;
            color: var(--text-muted);
            font-size: 14px;
            margin-top: 12px;
        }
        footer a {
            color: var(--neon-blue);
            text-decoration: none;
            transition: all 0.2s ease;
        }
        footer a:hover {
            text-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
            color: var(--neon-cyan);
        }
        .ad-container {
            margin: 32px 0;
            padding: 20px;
            background: rgba(37, 43, 69, 0.4);
            backdrop-filter: blur(10px);
            border-radius: 12px;
            border: 1px solid rgba(0, 212, 255, 0.15);
            text-align: center;
            min-height: 100px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 14px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .ad-container::before {
            content: "广告位";
            opacity: 0.5;
        }
        .breadcrumb {
            margin-bottom: 24px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--neon-blue);
            text-decoration: none;
            transition: all 0.2s ease;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
            text-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
            color: var(--neon-cyan);
        }
        .breadcrumb span {
            margin: 0 8px;
            color: var(--text-muted);
        }

        /* 顶部导航 - 自适应菜单 */
        .top-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
            padding: 12px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .top-nav-left {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .top-nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-home {
            font-weight: 700;
            font-size: 18px;
            color: var(--neon-blue);
            text-decoration: none;
            transition: all 0.2s ease;
        }
        .nav-home:hover {
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
            color: var(--neon-cyan);
        }
        .nav-dropdown {
            position: relative;
        }
        .nav-dropdown-trigger {
            padding: 8px 14px;
            font-size: 14px;
            color: var(--text-secondary);
            background: rgba(37, 43, 69, 0.5);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .nav-dropdown-trigger:hover {
            color: var(--neon-blue);
            border-color: rgba(0, 212, 255, 0.4);
        }
        .nav-dropdown-trigger[aria-expanded="true"] {
            border-color: var(--neon-blue);
            color: var(--neon-blue);
        }
        .nav-dropdown-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            margin: 6px 0 0;
            padding: 8px 0;
            min-width: 200px;
            background: rgba(26, 31, 58, 0.98);
            border: 1px solid rgba(0, 212, 255, 0.3);
            border-radius: 10px;
            list-style: none;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            z-index: 100;
        }
        .nav-dropdown-menu.show {
            display: block;
        }
        .nav-dropdown-menu li a {
            display: block;
            padding: 10px 16px;
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 14px;
            transition: all 0.2s ease;
        }
        .nav-dropdown-menu li a:hover {
            color: var(--neon-blue);
            background: rgba(0, 212, 255, 0.1);
        }
        .nav-link {
            padding: 8px 14px;
            font-size: 14px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all 0.2s ease;
        }
        .nav-link:hover {
            color: var(--neon-blue);
        }
        .nav-btn {
            padding: 10px 20px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 10px;
            text-decoration: none;
            transition: all 0.25s ease;
        }
        .nav-btn-outline {
            color: var(--neon-blue);
            border: 2px solid var(--neon-blue);
            background: transparent;
        }
        .nav-btn-outline:hover {
            background: rgba(0, 212, 255, 0.15);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
        }
        .nav-btn-primary {
            color: #0a0e27;
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-cyan));
            border: none;
        }
        .nav-btn-primary:hover {
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.5);
            transform: translateY(-1px);
        }
        .nav-mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            padding: 0;
            background: rgba(37, 43, 69, 0.5);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 8px;
            cursor: pointer;
            position: relative;
        }
        .nav-mobile-toggle::before,
        .nav-mobile-toggle::after {
            content: '';
            position: absolute;
            left: 10px;
            right: 10px;
            height: 2px;
            background: var(--text-secondary);
            transition: all 0.3s ease;
        }
        .nav-mobile-toggle::before { top: 14px; }
        .nav-mobile-toggle::after { top: 22px; }
        .nav-mobile-toggle.open::before { transform: rotate(45deg); top: 18px; }
        .nav-mobile-toggle.open::after { transform: rotate(-45deg); top: 18px; }
        .nav-home-mobile { display: none; }
        @media (max-width: 768px) {
            .nav-home-mobile { display: block; }
            .top-nav-left .nav-home { display: none; }
            .nav-mobile-toggle { display: flex; align-items: center; justify-content: center; }
            .top-nav {
                flex-wrap: wrap;
            }
            .top-nav-left,
            .top-nav-right {
                display: none;
                order: 10;
                width: 100%;
                flex-direction: column;
                padding-top: 12px;
                border-top: 1px solid rgba(0, 212, 255, 0.2);
                margin-top: 4px;
            }
            .top-nav.open .top-nav-left,
            .top-nav.open .top-nav-right {
                display: flex;
            }
            .top-nav.open .nav-dropdown .nav-dropdown-menu {
                position: static;
                margin: 8px 0 0;
                box-shadow: none;
            }
            .top-nav.open .nav-dropdown-menu.show,
            .top-nav.open .nav-dropdown-menu {
                display: block;
            }
            .nav-btn { width: 100%; text-align: center; }
        }
        .mode-switch {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 12px;
            margin: 12px 0 16px;
        }
        .mode-option {
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 12px;
            padding: 12px 14px;
            display: flex;
            gap: 10px;
            align-items: flex-start;
            background: rgba(37, 43, 69, 0.5);
            backdrop-filter: blur(10px);
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }
        .mode-option input {
            margin-top: 4px;
        }
        .mode-option strong {
            display: block;
            color: var(--text-primary);
            font-weight: 600;
        }
        .mode-option span {
            display: block;
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.5;
        }
        .mode-option:hover {
            border-color: rgba(0, 212, 255, 0.4);
            background: rgba(37, 43, 69, 0.7);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
        }
        .mode-option.active {
            border-color: var(--neon-blue);
            box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3), var(--glow-blue);
            background: rgba(0, 212, 255, 0.1);
        }
        .enterprise-options {
            margin: 12px 0 16px;
            padding: 14px 16px;
            background: rgba(37, 43, 69, 0.4);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 10px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .enterprise-options .options-label {
            margin: 0 0 10px;
            font-size: 13px;
            color: var(--text-primary);
            font-weight: 600;
        }
        .enterprise-options .options-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            align-items: center;
        }
        /* 主题风格：颜色预览块 */
        .enterprise-options .theme-preview {
            display: block;
            width: 72px;
            height: 56px;
            border-radius: 8px;
            border: 1px solid rgba(255,255,255,0.15);
        }
        .enterprise-options .theme-tech-blue { background: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #60a5fa 100%); }
        .enterprise-options .theme-business-gray { background: linear-gradient(135deg, #374151 0%, #4b5563 50%, #9ca3af 100%); }
        .enterprise-options .theme-vital-orange { background: linear-gradient(135deg, #c2410c 0%, #ea580c 50%, #fb923c 100%); }
        .enterprise-options .theme-nature-green { background: linear-gradient(135deg, #047857 0%, #059669 50%, #34d399 100%); }
        .enterprise-options .theme-elegant-purple { background: linear-gradient(135deg, #5b21b6 0%, #7c3aed 50%, #a78bfa 100%); }
        .enterprise-options .theme-simple-white { background: linear-gradient(135deg, #f1f5f9 0%, #f8fafc 50%, #e2e8f0 100%); border-color: rgba(148,163,184,0.5); }
        .enterprise-options .theme-classic-black-gold { background: linear-gradient(135deg, #1f2937 0%, #374151 50%, #d97706 100%); }
        .enterprise-options .theme-fresh-teal { background: linear-gradient(135deg, #0f766e 0%, #0d9488 50%, #5eead4 100%); }
        .enterprise-options .options-theme-grid {
            grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
        }
        .enterprise-options .option-radio,
        .enterprise-options .option-check {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .enterprise-options .option-radio:hover,
        .enterprise-options .option-check:hover {
            color: var(--text-primary);
        }
        .enterprise-options .requirement-tip {
            margin-top: 14px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .enterprise-options .requirement-tip summary {
            cursor: pointer;
            color: var(--neon-blue);
            font-weight: 600;
            transition: all 0.2s ease;
        }
        .enterprise-options .requirement-tip summary:hover {
            text-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
        }
        .enterprise-options .requirement-tip ul {
            margin: 8px 0 0;
            padding-left: 20px;
            line-height: 1.6;
        }
        .enterprise-options .requirement-tip li {
            margin-bottom: 6px;
        }
        /* 企业官网选项：上文字下骨架图卡片布局 */
        .enterprise-options .options-label {
            display: block;
        }
        .enterprise-options .options-preview-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
            gap: 12px;
        }
        .enterprise-options .options-components-grid {
            grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        }
        .enterprise-options .option-with-preview {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 10px 8px;
            border-radius: 10px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            background: rgba(37, 43, 69, 0.3);
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .enterprise-options .option-with-preview:hover {
            border-color: rgba(0, 212, 255, 0.5);
            background: rgba(0, 212, 255, 0.08);
        }
        .enterprise-options .option-with-preview:has(input:checked) {
            border-color: var(--neon-blue);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
            background: rgba(0, 212, 255, 0.12);
        }
        .enterprise-options .option-with-preview .option-text {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            text-align: center;
            line-height: 1.3;
        }
        .enterprise-options .option-with-preview .option-preview {
            width: 72px;
            height: 56px;
            color: var(--text-muted);
            opacity: 0.9;
        }
        .enterprise-options .option-with-preview .option-preview svg {
            width: 100%;
            height: 100%;
            stroke: currentColor;
            stroke-width: 1.5;
            fill: none;
        }
        .enterprise-options .options-row-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: flex-start;
        }
        .enterprise-options .opt-hint {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            margin-left: 4px;
            border-radius: 50%;
            background: rgba(148, 163, 184, 0.3);
            color: var(--text-muted);
            font-size: 12px;
            font-weight: 700;
            cursor: help;
            vertical-align: middle;
        }
        .enterprise-options .opt-hint:hover {
            background: rgba(0, 212, 255, 0.3);
            color: var(--neon-blue);
        }
        /* 案例需求快捷选择 */
        .enterprise-options .case-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
            gap: 10px;
        }
        .enterprise-options .case-requirement-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            padding: 12px 10px;
            border-radius: 10px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            background: rgba(37, 43, 69, 0.3);
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .enterprise-options .case-requirement-card:hover {
            border-color: rgba(0, 212, 255, 0.5);
            background: rgba(0, 212, 255, 0.08);
        }
        .enterprise-options .case-card-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: center;
        }
        .enterprise-options .case-use-generate-btn {
            font-size: 11px;
            padding: 4px 10px;
            border-radius: 6px;
            border: 1px solid var(--neon-blue);
            background: transparent;
            color: var(--neon-blue);
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .enterprise-options .case-use-generate-btn:hover {
            background: rgba(0, 212, 255, 0.2);
        }
        .enterprise-options .case-use-generate-btn:active {
            transform: scale(0.98);
        }
        /* 功能特点展示区（3D圆形轮播） */
        .features-carousel-3d {
            margin: 60px 0;
            perspective: 1500px;
            height: 400px;
            overflow: hidden;
        }
        .carousel-wrapper {
            position: relative;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .carousel-stage {
            position: relative;
            width: 300px;
            height: 300px;
            transform-style: preserve-3d;
            transition: transform 0.5s ease-out;
            cursor: grab;
            user-select: none;
            -webkit-user-select: none;
            -moz-user-select: none;
            -ms-user-select: none;
        }
        .carousel-stage:active {
            cursor: grabbing;
        }
        .carousel-stage * {
            user-select: none;
            -webkit-user-select: none;
            -moz-user-select: none;
            -ms-user-select: none;
        }
        .carousel-stage .feature-card {
            position: absolute;
            width: 260px;
            height: 320px;
            left: 50%;
            top: 50%;
            margin-left: -130px;
            margin-top: -160px;
            background: rgba(26, 31, 58, 0.7);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 20px;
            padding: 32px 24px;
            text-align: center;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(0, 212, 255, 0.1);
            backdrop-filter: blur(20px);
            transition: all 0.3s ease;
        }
        .carousel-stage .feature-card:hover {
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), var(--glow-blue);
            border-color: rgba(0, 212, 255, 0.4);
            transform: translateY(-4px);
        }
        .carousel-stage .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
        }
        .carousel-stage .feature-icon svg {
            width: 32px;
            height: 32px;
        }
        .carousel-stage .feature-card h3 {
            margin: 0 0 12px;
            font-size: 18px;
            color: var(--text-primary);
            font-weight: 700;
        }
        .carousel-stage .feature-card p {
            margin: 0;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 3D等距流程图 */
        .isometric-flow-section {
            margin: 60px 0 40px;
            padding: 40px 32px 32px;
            background: rgba(26, 31, 58, 0.4);
            backdrop-filter: blur(20px);
            border-radius: 32px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }
        .isometric-container {
            max-width: 1200px;
            margin: 24px auto 0;
            background: rgba(10, 14, 39, 0.6);
            backdrop-filter: blur(10px);
            border-radius: 24px;
            padding: 30px 20px 20px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.15);
        }
        .isometric-canvas {
            width: 100%;
            height: auto;
            display: block;
        }
        .iso-module {
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .iso-module:hover {
            filter: brightness(1.1);
            transform: translateY(-2px);
        }
        .iso-module.active {
            animation: moduleGlow 2s infinite;
        }
        @keyframes moduleGlow {
            0%, 100% {
                filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.3));
            }
            50% {
                filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.6));
            }
        }
        .pipe {
            transition: stroke 0.3s ease;
        }
        .flow-particle {
            fill: #6366f1;
            filter: drop-shadow(0 0 6px rgba(99, 102, 241, 0.8));
        }
        .iso-module-future {
            cursor: default;
            transition: all 0.3s ease;
        }
        .iso-module-future:hover {
            opacity: 0.8 !important;
        }
        .pipe-future {
            animation: dashFlow 20s linear infinite;
        }
        @keyframes dashFlow {
            to {
                stroke-dashoffset: -100;
            }
        }

        /* 使用场景展示区 */
        .scenarios-section {
            margin: 48px 0 40px;
            padding: 40px 32px;
            background: rgba(26, 31, 58, 0.5);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.4), var(--glow-blue);
        }
        .section-title {
            text-align: center;
            font-size: 28px;
            margin: 0 0 12px;
            background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-weight: 800;
            filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.3));
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            font-size: 15px;
            margin: 0 auto 32px;
            max-width: 600px;
        }
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }
        .scenario-card {
            background: rgba(37, 43, 69, 0.6);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 18px;
            padding: 24px;
            transition: all 0.25s ease;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .scenario-card:hover {
            transform: translateY(-4px) scale(1.02);
            box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4), var(--glow-blue);
            border-color: rgba(0, 212, 255, 0.5);
            background: rgba(37, 43, 69, 0.8);
        }
        .scenario-icon {
            font-size: 40px;
            margin-bottom: 16px;
            display: block;
        }
        .scenario-card h3 {
            margin: 0 0 12px;
            font-size: 18px;
            color: var(--text-primary);
            font-weight: 700;
        }
        .scenario-card p {
            margin: 0 0 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .scenario-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .scenario-tags .tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 212, 255, 0.15);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: var(--neon-blue);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        .scenario-tags .tag:hover {
            background: rgba(0, 212, 255, 0.25);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
        }

        /* 优化后的案例卡片 */
        .recent-card-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 4px;
        }
        .recent-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .recent-category {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 999px;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* 响应式设计优化 */
        @media (max-width: 720px) {
            body::before {
                background-size: 30px 30px;
            }
            .input-stack {
                flex-direction: column;
            }
            .next-button {
                padding: 14px 22px;
                width: 100%;
            }
            .step-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .step-actions {
                width: 100%;
            }
            .btn {
                flex: 1;
                justify-content: center;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
            .scenarios-section {
                padding: 28px 20px;
            }
            .section-title {
                font-size: 24px;
            }
            .step-card {
                padding: 24px 20px;
            }
            .hero h1 {
                font-size: clamp(28px, 6vw, 36px);
            }
            /* 移动端减少动画效果以提升性能 */
            .recent-card:hover,
            .scenario-card:hover {
                transform: translateY(-2px);
            }
        }
        /* 减少动画偏好设置 */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }