* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #7c3aed;
            --primary-light: #a78bfa;
            --primary-dark: #5b21b6;
            --secondary: #ec4899;
            --accent: #06b6d4;
            --bg-light: #faf5ff;
            --bg-white: #ffffff;
            --text-dark: #1e1b4b;
            --text-body: #334155;
            --text-light: #64748b;
            --border: #e9d5ff;
            --shadow-sm: 0 1px 3px rgba(124, 58, 237, 0.08);
            --shadow-md: 0 4px 20px rgba(124, 58, 237, 0.12);
            --shadow-lg: 0 12px 40px rgba(124, 58, 237, 0.18);
            --radius: 16px;
            --radius-sm: 10px;
            --container: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            background: linear-gradient(180deg, #faf5ff 0%, #f3e8ff 40%, #fdf4ff 100%);
            background-attachment: fixed;
            color: var(--text-body);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        /* Skip to content */
        .skip-link {
            position: absolute;
            left: -9999px;
            top: 0;
            background: var(--primary);
            color: #fff;
            padding: 12px 24px;
            z-index: 9999;
            border-radius: 0 0 8px 0;
            font-weight: 600;
        }
        .skip-link:focus {
            left: 0;
        }

        /* ===== Header ===== */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            min-height: 68px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .ai-page-logo {
            width: 36px;
            height: 36px;
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
        }
        .brand-name span {
            color: var(--secondary);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 8px 10px;
            cursor: pointer;
            color: var(--primary-dark);
            font-size: 1.1rem;
            line-height: 1;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: var(--bg-light);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 12px;
            color: var(--text-body);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 8px;
            transition: color 0.2s, background 0.2s;
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--bg-light);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 600;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: #fff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
        }
        .btn-primary:hover {
            box-shadow: 0 6px 22px rgba(124, 58, 237, 0.5);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary-light);
        }
        .btn-outline:hover {
            background: var(--bg-light);
            border-color: var(--primary);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 1.05rem;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 72px 0 80px;
            overflow: hidden;
            background: linear-gradient(135deg, #faf5ff 0%, #ede9fe 30%, #fce7f3 70%, #fdf4ff 100%);
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(167, 139, 250, 0.35) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            animation: floatSlow 12s ease-in-out infinite;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(236, 72, 153, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            animation: floatSlow 15s ease-in-out infinite reverse;
        }
        @keyframes floatSlow {
            0%, 100% { transform: translate(0, 0) scale(1); }
            50% { transform: translate(30px, -20px) scale(1.08); }
        }
        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content {
            animation: fadeUp 0.8s ease both;
        }
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.85);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 20px;
            box-shadow: var(--shadow-sm);
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            background: #22c55e;
            border-radius: 50%;
            box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
            animation: pulseDot 2s infinite;
        }
        @keyframes pulseDot {
            0%, 100% { box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2); }
            50% { box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.1); }
        }
        h1 {
            font-size: 2.6rem;
            line-height: 1.25;
            font-weight: 900;
            color: var(--text-dark);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        h1 .highlight {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: var(--primary);
        }
        .hero-sub {
            font-size: 1.08rem;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 28px;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            padding: 5px 12px;
            background: rgba(255, 255, 255, 0.7);
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: 0.78rem;
            color: var(--text-light);
            font-weight: 500;
            transition: transform 0.2s, border-color 0.2s;
        }
        .tag:hover {
            transform: translateY(-2px);
            border-color: var(--primary-light);
            color: var(--primary-dark);
        }

        /* Hero stats card group */
        .hero-visual {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            animation: fadeUp 0.9s ease 0.15s both;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.9);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow-md);
            transition: transform 0.3s, box-shadow 0.3s;
            position: relative;
            overflow: hidden;
        }
        .stat-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity 0.3s;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .stat-card:hover::after {
            opacity: 1;
        }
        .stat-card.full {
            grid-column: 1 / -1;
        }
        .stat-number {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--primary-dark);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-number .unit {
            font-size: 1rem;
            font-weight: 700;
            color: var(--secondary);
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-light);
            font-weight: 500;
        }
        .stat-desc {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 6px;
            line-height: 1.5;
        }

        /* ===== Section common ===== */
        section {
            padding: 72px 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
            padding: 4px 14px;
            background: rgba(124, 58, 237, 0.08);
            border-radius: 50px;
        }
        h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .section-head p {
            font-size: 1rem;
            color: var(--text-light);
            max-width: 680px;
            margin: 0 auto;
        }
        h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .icon-box {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 16px;
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.12), rgba(236, 72, 153, 0.12));
            color: var(--primary);
        }
        .card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== Services tags ===== */
        .service-tag-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .service-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 10px 18px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-body);
            transition: all 0.25s;
            cursor: default;
        }
        .service-item:hover {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-color: transparent;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* ===== Models ===== */
        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .model-chip {
            padding: 8px 18px;
            background: rgba(255, 255, 255, 0.7);
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary-dark);
            transition: all 0.25s;
        }
        .model-chip:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== Process timeline ===== */
        .process-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .process-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 22px;
            border: 1px solid var(--border);
            position: relative;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .process-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .process-num {
            counter-increment: step;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.05rem;
            margin-bottom: 16px;
            box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
        }
        .process-num::before {
            content: counter(step, decimal-leading-zero);
        }
        .process-item h3 {
            font-size: 1.05rem;
        }
        .process-item p {
            font-size: 0.88rem;
            color: var(--text-light);
        }

        /* ===== Table ===== */
        .table-wrap {
            overflow-x: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            background: var(--bg-white);
            -webkit-overflow-scrolling: touch;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            min-width: 620px;
        }
        th, td {
            padding: 16px 20px;
            text-align: left;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border);
        }
        th {
            background: linear-gradient(135deg, #faf5ff, #f3e8ff);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 0.5px;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tbody tr:hover {
            background: rgba(250, 245, 255, 0.7);
        }
        td .yes {
            color: #16a34a;
            font-weight: 700;
        }

        /* ===== Rating ===== */
        .rating-card {
            background: linear-gradient(135deg, #ffffff 0%, #faf5ff 100%);
            border: 2px solid var(--primary-light);
            border-radius: var(--radius);
            padding: 36px 32px;
            text-align: center;
            box-shadow: var(--shadow-md);
        }
        .rating-stars {
            font-size: 2rem;
            letter-spacing: 6px;
            margin-bottom: 10px;
        }
        .rating-score {
            font-size: 3rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
        }
        .rating-label {
            font-size: 0.95rem;
            color: var(--text-light);
            font-weight: 600;
        }

        /* ===== Comments ===== */
        .comment-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .comment-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 26px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s, box-shadow 0.3s;
            display: flex;
            flex-direction: column;
        }
        .comment-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .comment-stars {
            color: #f59e0b;
            font-size: 0.9rem;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .comment-text {
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.75;
            margin-bottom: 18px;
            flex: 1;
        }
        .comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .comment-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            flex-shrink: 0;
        }
        .comment-name {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-dark);
        }
        .comment-role {
            font-size: 0.78rem;
            color: var(--text-light);
        }

        /* ===== Case / Article ===== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s, box-shadow 0.3s;
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .case-img-wrap {
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-light);
        }
        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.4s;
        }
        .case-card:hover .case-img-wrap img {
            transform: scale(1.04);
        }
        .case-body {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .case-cat {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--primary);
            background: rgba(124, 58, 237, 0.08);
            padding: 3px 10px;
            border-radius: 50px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .case-body h3 {
            font-size: 1.02rem;
            margin-bottom: 8px;
        }
        .case-body p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
        }

        /* Article list */
        .article-list {
            list-style: none;
            display: grid;
            gap: 0;
        }
        .article-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 12px;
            transition: all 0.25s;
            text-decoration: none;
            color: inherit;
        }
        .article-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }
        .article-title {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.5;
        }
        .article-arrow {
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        /* ===== Form ===== */
        .form-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 36px 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .form-group.full {
            grid-column: 1 / -1;
        }
        .form-group label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-dark);
        }
        .form-group label .req {
            color: var(--secondary);
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1.5px solid var(--border);
            border-radius: 10px;
            font-size: 0.92rem;
            color: var(--text-dark);
            background: #fefcff;
            font-family: inherit;
            transition: border-color 0.2s, box-shadow 0.2s;
            outline: none;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 110px;
        }
        .form-note {
            font-size: 0.78rem;
            color: var(--text-light);
            margin-top: 14px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: box-shadow 0.25s, border-color 0.25s;
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item.active {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            font-family: inherit;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: rgba(250, 245, 255, 0.6);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(124, 58, 237, 0.08);
            color: var(--primary);
            font-size: 1rem;
            font-weight: 700;
            transition: transform 0.3s;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.75;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px 22px;
        }

        /* ===== Footer ===== */
        footer {
            background: #1e1b4b;
            color: #c7d2fe;
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px 32px;
            padding-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .footer-brand .brand {
            color: #fff;
        }
        .footer-brand .brand-name {
            color: #fff;
        }
        .footer-brand .brand-name span {
            color: var(--primary-light);
        }
        .footer-desc {
            font-size: 0.85rem;
            color: #a5b4fc;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            display: grid;
            gap: 10px;
        }
        .footer-col a {
            color: #a5b4fc;
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.2s;
            word-break: break-all;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-col p {
            font-size: 0.85rem;
            color: #a5b4fc;
            line-height: 1.8;
            margin-bottom: 6px;
        }
        .footer-col p strong {
            color: #e0e7ff;
            font-weight: 600;
        }
        .footer-bottom {
            border-top: 1px solid rgba(165, 180, 252, 0.2);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.8rem;
            color: #818cf8;
        }
        .footer-friendlinks {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 18px;
            align-items: center;
        }
        .footer-friendlinks a {
            color: #a5b4fc;
            text-decoration: none;
            font-size: 0.8rem;
            transition: color 0.2s;
        }
        .footer-friendlinks a:hover {
            color: #fff;
        }

        /* ===== Floating ===== */
        .float-btns {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 900;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .float-btn {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border: none;
            color: #fff;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            transition: transform 0.25s, box-shadow 0.25s;
            text-decoration: none;
        }
        .float-btn:hover {
            transform: scale(1.1);
            box-shadow: var(--shadow-lg);
        }
        .float-kefu {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
        }
        .float-top {
            background: var(--primary-dark);
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s, transform 0.25s;
        }
        .float-top.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== Kefu panel ===== */
        .kefu-panel {
            position: fixed;
            right: 84px;
            bottom: 80px;
            z-index: 950;
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            width: 220px;
            text-align: center;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px) scale(0.96);
            transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
        }
        .kefu-panel.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0) scale(1);
        }
        .kefu-panel img {
            width: 100%;
            max-width: 160px;
            height: auto;
            border-radius: 8px;
            display: block;
            margin: 0 auto 10px;
        }
        .kefu-panel p {
            font-size: 0.82rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .kefu-close {
            position: absolute;
            top: 8px;
            right: 10px;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--text-light);
            font-size: 1rem;
            line-height: 1;
        }

        /* ===== Reveal animation ===== */
        .reveal {
            opacity: 0;
            transform: translateY(28px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Data metrics ===== */
        .metric-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .metric-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .metric-value {
            font-size: 1.6rem;
            font-weight: 900;
            color: var(--primary-dark);
            margin-bottom: 6px;
        }
        .metric-value .unit {
            font-size: 0.9rem;
            color: var(--secondary);
        }
        .metric-label {
            font-size: 0.82rem;
            color: var(--text-light);
        }

        /* ===== Network ===== */
        .network-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 14px;
        }
        .network-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 14px 10px;
            text-align: center;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-body);
            transition: all 0.25s;
        }
        .network-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Agent / Join ===== */
        .join-banner {
            background: linear-gradient(135deg, #5b21b6 0%, #7c3aed 50%, #db2777 100%);
            border-radius: var(--radius);
            padding: 48px 40px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .join-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 260px;
            height: 260px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
        }
        .join-banner-text {
            position: relative;
            z-index: 2;
            flex: 1;
            min-width: 240px;
        }
        .join-banner h2 {
            color: #fff;
            font-size: 1.6rem;
            margin-bottom: 8px;
        }
        .join-banner p {
            color: rgba(255, 255, 255, 0.88);
            font-size: 0.95rem;
            max-width: 560px;
        }
        .join-banner .btn-white {
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            position: relative;
            z-index: 2;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }
        .join-banner .btn-white:hover {
            box-shadow: 0 6px 22px rgba(0, 0, 0, 0.25);
            transform: translateY(-2px);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            h1 {
                font-size: 2.2rem;
            }
            .grid-4, .metric-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .network-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .process-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 860px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                gap: 4px;
                max-height: 70vh;
                overflow-y: auto;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 14px;
                font-size: 0.95rem;
                border-radius: 10px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-cta .btn-outline {
                display: none;
            }
            .grid-3, .comment-grid, .case-grid {
                grid-template-columns: 1fr 1fr;
            }
            .grid-2, .form-grid {
                grid-template-columns: 1fr;
            }
            .form-card {
                padding: 28px 22px;
            }
        }
        @media (max-width: 640px) {
            section {
                padding: 52px 0;
            }
            h1 {
                font-size: 1.75rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .hero {
                padding: 48px 0 56px;
            }
            .hero-sub {
                font-size: 0.98rem;
            }
            .grid-3, .grid-4, .metric-row, .comment-grid, .case-grid, .process-list {
                grid-template-columns: 1fr;
            }
            .network-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-visual {
                grid-template-columns: 1fr 1fr;
            }
            .float-btns {
                right: 14px;
                bottom: 70px;
            }
            .float-btn {
                width: 46px;
                height: 46px;
                font-size: 1rem;
            }
            .kefu-panel {
                right: 70px;
                bottom: 70px;
                width: 190px;
            }
            .join-banner {
                padding: 32px 24px;
            }
            .article-item {
                padding: 14px 16px;
            }
            .section-head {
                margin-bottom: 32px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
            .reveal {
                opacity: 1;
                transform: none;
            }
        }