/* CSS Reset & Variable Definitions (多彩涂鸦风 - 粗线框、亮色块、现代新粗野主义) */
        :root {
            --primary: #FFDE47;     /* 涂鸦明黄 */
            --secondary: #FF76CE;   /* 涂鸦粉红 */
            --tertiary: #9BECF9;    /* 涂鸦青蓝 */
            --accent: #7BC9FF;      /* 涂鸦亮蓝 */
            --dark: #1A1A1A;        /* 深黑字/粗边框 */
            --light: #FBF9F5;       /* 浅米底色 */
            --white: #FFFFFF;
            --gray: #F0EDE6;
            --border-width: 3px;
            --shadow: 5px 5px 0px var(--dark);
            --shadow-sm: 3px 3px 0px var(--dark);
            --shadow-lg: 8px 8px 0px var(--dark);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Container & Grid Layouts */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* Utilities */
        .badge {
            display: inline-block;
            padding: 6px 12px;
            background-color: var(--secondary);
            color: var(--dark);
            border: var(--border-width) solid var(--dark);
            font-weight: bold;
            font-size: 0.85rem;
            transform: rotate(-2deg);
            margin-bottom: 10px;
            box-shadow: var(--shadow-sm);
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 900;
            text-align: center;
            margin-bottom: 50px;
            position: relative;
            display: inline-block;
            left: 50%;
            transform: translateX(-50%);
            padding: 10px 20px;
            background-color: var(--primary);
            border: var(--border-width) solid var(--dark);
            box-shadow: var(--shadow);
        }

        .section-desc {
            text-align: center;
            max-width: 700px;
            margin: -30px auto 50px auto;
            font-size: 1.1rem;
            font-weight: 500;
        }

        /* Header & Navigation */
        header {
            background-color: var(--white);
            border-bottom: var(--border-width) solid var(--dark);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-area img {
            height: 45px;
            width: auto;
        }

        .brand-name {
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--dark);
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            align-items: center;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 6px 12px;
            border-radius: 4px;
            transition: all 0.2s ease;
        }

        .nav-menu a:hover {
            background-color: var(--tertiary);
            transform: translateY(-2px);
        }

        .nav-btn {
            background-color: var(--secondary);
            border: var(--border-width) solid var(--dark);
            padding: 8px 18px;
            color: var(--dark);
            font-weight: 800;
            text-decoration: none;
            box-shadow: var(--shadow-sm);
            transition: all 0.15s ease;
        }

        .nav-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 5px 5px 0px var(--dark);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
        }

        /* Hero Section (No Images Allowed) */
        .hero {
            padding: 100px 0 80px;
            background: radial-gradient(circle at 10% 20%, rgba(255, 118, 206, 0.15) 0%, rgba(255, 222, 71, 0.1) 90%);
            border-bottom: var(--border-width) solid var(--dark);
            position: relative;
        }

        .hero::before {
            content: "CREATIVE AI";
            position: absolute;
            top: 20px;
            right: 40px;
            font-size: 6rem;
            font-weight: 900;
            color: rgba(26, 26, 26, 0.03);
            pointer-events: none;
            font-style: italic;
        }

        .hero-content {
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-h1 {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 25px;
            text-shadow: 2px 2px 0px var(--accent);
        }

        .hero-h1 span {
            background: linear-gradient(180deg, transparent 60%, var(--primary) 60%);
            padding: 0 5px;
        }

        .hero-p {
            font-size: 1.25rem;
            margin-bottom: 40px;
            color: #333;
            font-weight: 500;
        }

        .hero-actions {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        .btn-primary {
            background-color: var(--primary);
            border: var(--border-width) solid var(--dark);
            padding: 15px 35px;
            font-size: 1.15rem;
            font-weight: 900;
            color: var(--dark);
            text-decoration: none;
            box-shadow: var(--shadow);
            transition: all 0.15s ease;
        }

        .btn-primary:hover {
            transform: translate(-3px, -3px);
            box-shadow: 8px 8px 0px var(--dark);
        }

        .btn-secondary {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            padding: 15px 35px;
            font-size: 1.15rem;
            font-weight: 900;
            color: var(--dark);
            text-decoration: none;
            box-shadow: var(--shadow);
            transition: all 0.15s ease;
        }

        .btn-secondary:hover {
            transform: translate(-3px, -3px);
            box-shadow: 8px 8px 0px var(--dark);
        }

        /* Stats Cards (No Images) */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .stat-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            padding: 25px;
            text-align: center;
            box-shadow: var(--shadow);
            transform: rotate(calc(var(--r, 0) * 1deg));
            transition: transform 0.3s ease;
        }

        .stat-card:hover {
            transform: scale(1.05) rotate(0deg);
        }

        .stat-num {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.95rem;
            font-weight: 700;
            color: #555;
        }

        /* Main Content Sections */
        section {
            padding: 80px 0;
            border-bottom: var(--border-width) solid var(--dark);
        }

        /* About Us & Platform Intro */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text {
            font-size: 1.05rem;
        }

        .about-text p {
            margin-bottom: 20px;
        }

        .highlight-box {
            background-color: var(--accent);
            border: var(--border-width) solid var(--dark);
            padding: 30px;
            box-shadow: var(--shadow);
        }

        .highlight-box h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            font-weight: 900;
        }

        /* Services & Features Cards */
        .grid-3col {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .feature-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            padding: 35px;
            box-shadow: var(--shadow);
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .feature-card:hover {
            transform: translate(-5px, -5px);
            box-shadow: 10px 10px 0px var(--dark);
        }

        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            display: inline-block;
        }

        .feature-title {
            font-size: 1.4rem;
            font-weight: 900;
            margin-bottom: 15px;
        }

        .feature-desc {
            font-size: 0.95rem;
            color: #444;
            margin-bottom: 20px;
        }

        .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .feature-tag {
            background-color: var(--gray);
            font-size: 0.75rem;
            padding: 4px 8px;
            font-weight: 700;
            border: 1px solid var(--dark);
        }

        /* Brand Grid */
        .brand-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 30px;
        }

        .brand-tag {
            background-color: var(--white);
            border: 2px solid var(--dark);
            padding: 8px 16px;
            font-weight: 800;
            font-size: 0.9rem;
            box-shadow: 3px 3px 0px var(--dark);
            border-radius: 30px;
        }

        .brand-tag:nth-child(even) {
            background-color: var(--tertiary);
        }

        .brand-tag:nth-child(3n) {
            background-color: var(--secondary);
        }

        /* Timeline (Steps) */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 6px;
            background-color: var(--dark);
            transform: translateX(-50%);
        }

        .timeline-item {
            padding: 20px 40px;
            position: relative;
            width: 50%;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }

        .timeline-dot {
            width: 24px;
            height: 24px;
            background-color: var(--primary);
            border: 4px solid var(--dark);
            border-radius: 50%;
            position: absolute;
            top: 25px;
            z-index: 1;
        }

        .timeline-item:nth-child(odd) .timeline-dot {
            right: -12px;
        }

        .timeline-item:nth-child(even) .timeline-dot {
            left: -12px;
        }

        .timeline-content {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            padding: 20px;
            box-shadow: var(--shadow-sm);
        }

        .timeline-step {
            font-size: 0.85rem;
            font-weight: 900;
            color: var(--secondary);
            margin-bottom: 5px;
        }

        .timeline-title {
            font-size: 1.25rem;
            font-weight: 900;
            margin-bottom: 10px;
        }

        /* Comparisons Table */
        .table-responsive {
            overflow-x: auto;
            border: var(--border-width) solid var(--dark);
            box-shadow: var(--shadow);
            background-color: var(--white);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        th, td {
            padding: 16px 20px;
            border-bottom: 2px solid var(--dark);
            border-right: 2px solid var(--dark);
            font-weight: 700;
        }

        th {
            background-color: var(--primary);
            color: var(--dark);
            font-weight: 900;
        }

        tr:last-child td {
            border-bottom: none;
        }

        td:last-child, th:last-child {
            border-right: none;
        }

        .rating-badge {
            background-color: var(--secondary);
            color: var(--dark);
            padding: 4px 10px;
            border: 2px solid var(--dark);
            font-weight: 900;
            font-size: 1.1rem;
            display: inline-block;
        }

        /* Case Studies (with Images) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .case-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            box-shadow: var(--shadow);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .case-image-wrapper {
            border-bottom: var(--border-width) solid var(--dark);
            position: relative;
            background-color: var(--gray);
            overflow: hidden;
        }

        .case-image-wrapper img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
            transition: transform 0.3s ease;
        }

        .case-card:hover .case-image-wrapper img {
            transform: scale(1.05);
        }

        .case-content {
            padding: 25px;
            flex-grow: 1;
        }

        .case-meta {
            font-size: 0.8rem;
            font-weight: 900;
            color: var(--secondary);
            margin-bottom: 10px;
        }

        .case-title {
            font-size: 1.25rem;
            font-weight: 900;
            margin-bottom: 12px;
        }

        .case-desc {
            font-size: 0.9rem;
            color: #555;
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .testi-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            padding: 30px;
            box-shadow: var(--shadow);
            position: relative;
        }

        .testi-quote {
            font-size: 0.95rem;
            font-weight: 500;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .testi-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .testi-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--accent);
            border: 2px solid var(--dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.2rem;
        }

        .testi-info h4 {
            font-size: 1rem;
            font-weight: 900;
        }

        .testi-info span {
            font-size: 0.8rem;
            color: #666;
            font-weight: 700;
        }

        /* Form section */
        .form-section-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .contact-info-panel {
            background-color: var(--tertiary);
            border: var(--border-width) solid var(--dark);
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .contact-info-panel h3 {
            font-size: 1.8rem;
            font-weight: 900;
            margin-bottom: 25px;
        }

        .info-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 20px;
        }

        .info-icon {
            font-size: 1.5rem;
        }

        .info-text h4 {
            font-weight: 900;
            font-size: 1rem;
        }

        .info-text p, .info-text a {
            color: var(--dark);
            font-weight: 500;
            word-break: break-all;
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .qr-wrapper {
            background-color: var(--white);
            border: 2px solid var(--dark);
            padding: 10px;
            text-align: center;
            max-width: 140px;
        }

        .qr-wrapper img {
            width: 100%;
            height: auto;
            display: block;
            margin-bottom: 5px;
        }

        .qr-wrapper span {
            font-size: 0.75rem;
            font-weight: 800;
        }

        .form-panel {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-weight: 800;
            margin-bottom: 8px;
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            border: var(--border-width) solid var(--dark);
            padding: 12px 15px;
            font-size: 1rem;
            font-weight: 600;
            background-color: var(--light);
            outline: none;
            transition: all 0.15s ease;
        }

        .form-control:focus {
            background-color: var(--white);
            box-shadow: 4px 4px 0px var(--dark);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        .form-submit-btn {
            width: 100%;
            background-color: var(--primary);
            border: var(--border-width) solid var(--dark);
            color: var(--dark);
            font-weight: 900;
            padding: 14px;
            font-size: 1.1rem;
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            transition: all 0.15s ease;
        }

        .form-submit-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: var(--shadow);
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 850px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            margin-bottom: 15px;
            box-shadow: var(--shadow-sm);
        }

        .faq-header {
            padding: 20px;
            font-weight: 900;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-header::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: bold;
            transition: transform 0.2s ease;
        }

        .faq-item.active .faq-header::after {
            transform: rotate(45deg);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease-out;
            border-top: 0px solid var(--dark);
            background-color: var(--light);
        }

        .faq-item.active .faq-body {
            border-top: var(--border-width) solid var(--dark);
            max-height: 300px;
        }

        .faq-content {
            padding: 20px;
            font-weight: 500;
            font-size: 0.95rem;
        }

        /* Encyclopedia Term Card */
        .encyclopedia-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .term-card {
            background-color: var(--white);
            border: 2px solid var(--dark);
            padding: 20px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.2s ease;
        }

        .term-card:hover {
            transform: translateY(-3px);
        }

        .term-title {
            font-size: 1.15rem;
            font-weight: 900;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .term-desc {
            font-size: 0.85rem;
            color: #555;
        }

        /* Article / Knowledge section */
        .article-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .article-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            padding: 25px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-card h4 {
            font-size: 1.2rem;
            font-weight: 900;
            margin-bottom: 12px;
        }

        .article-card p {
            font-size: 0.9rem;
            color: #666;
            margin-bottom: 15px;
        }

        .article-link {
            font-weight: 800;
            color: var(--dark);
            text-decoration: underline;
            font-size: 0.9rem;
        }

        .article-link:hover {
            color: var(--secondary);
        }

        /* Footer & Links */
        footer {
            background-color: var(--dark);
            color: var(--light);
            padding: 60px 0 20px;
            font-weight: 500;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo img {
            height: 45px;
            margin-bottom: 15px;
            background-color: var(--white);
            padding: 5px;
            border-radius: 4px;
        }

        .footer-col h5 {
            font-size: 1.1rem;
            font-weight: 900;
            margin-bottom: 20px;
            color: var(--primary);
            text-transform: uppercase;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--light);
            text-decoration: none;
            font-size: 0.9rem;
        }

        .footer-links a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid #333;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.85rem;
        }

        .footer-bottom p {
            color: #aaa;
        }

        /* Friendlinks Wrapper */
        .friend-links-area {
            background-color: #262626;
            padding: 15px;
            border-radius: 4px;
            margin-top: 20px;
            font-size: 0.85rem;
            border: 1px solid #333;
        }

        .friend-links-area a {
            color: #aaa;
            text-decoration: none;
            margin-right: 15px;
            display: inline-block;
        }

        .friend-links-area a:hover {
            color: var(--primary);
        }

        /* Floating Widgets */
        .floating-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            background-color: var(--primary);
            border: var(--border-width) solid var(--dark);
            padding: 12px 18px;
            font-weight: 900;
            text-decoration: none;
            color: var(--dark);
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all 0.2s ease;
        }

        .floating-contact:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .about-grid, .form-section-wrapper {
                grid-template-columns: 1fr;
            }
            .hero-h1 {
                font-size: 2.8rem;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 50px;
                padding-right: 0;
            }
            .timeline-item:nth-child(odd), .timeline-item:nth-child(even) {
                left: 0;
                text-align: left;
            }
            .timeline-dot {
                left: 10px !important;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                right: 0;
                background-color: var(--white);
                border-bottom: var(--border-width) solid var(--dark);
                padding: 20px;
                box-shadow: var(--shadow);
            }
            .nav-menu.show {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-h1 {
                font-size: 2.2rem;
            }
        }