/* --------------------------------------------------
           主题样式：艳红热烈风 (Warm Vibrant Crimson Red Theme)
        -------------------------------------------------- */
        :root {
            --primary-color: #d90429;
            --primary-hover: #ef233c;
            --primary-dark: #8d99ae;
            --accent-gold: #d4af37;
            --accent-warm: #ff4d4f;
            --bg-light: #fffcfc;
            --bg-card: #ffffff;
            --bg-alt: #fff5f5;
            --text-main: #1d2129;
            --text-sub: #4e5969;
            --text-muted: #86909c;
            --border-color: #ffe3e3;
            --shadow-sm: 0 4px 12px rgba(217, 4, 41, 0.06);
            --shadow-hover: 0 12px 28px rgba(217, 4, 41, 0.14);
            --radius-main: 12px;
            --max-width: 1240px;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.25s ease;
        }

        /* 统一容器规范 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ---------------- Global Header & Nav ---------------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-logo img {
            max-height: 42px;
            width: auto;
            object-fit: contain;
        }

        .brand-title-wrap {
            display: flex;
            flex-direction: column;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary-color);
            letter-spacing: -0.5px;
        }

        .brand-tagline {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* 必须约束 .nav-links gap 为 0 */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0;
            list-style: none;
        }

        .nav-links li a {
            display: block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 6px;
        }

        .nav-links li a:hover {
            color: var(--primary-color);
            background: rgba(217, 4, 41, 0.05);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            cursor: pointer;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, #d90429 0%, #ef233c 100%);
            color: #ffffff !important;
            box-shadow: 0 4px 14px rgba(217, 4, 41, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(217, 4, 41, 0.45);
        }

        .btn-secondary {
            background: var(--bg-alt);
            color: var(--primary-color);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            background: #ffe3e3;
            color: var(--primary-color);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-main);
            cursor: pointer;
        }

        /* ---------------- Section Common Styles ---------------- */
        section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 50px auto;
        }

        .section-badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(217, 4, 41, 0.08);
            color: var(--primary-color);
            font-size: 13px;
            font-weight: 700;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-sub);
        }

        /* ---------------- Hero Section (No Images Allowed) ---------------- */
        .hero-section {
            padding: 100px 0 80px 0;
            background: linear-gradient(180deg, #fff2f2 0%, #ffffff 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: "";
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 800px;
            height: 400px;
            background: radial-gradient(circle, rgba(217, 4, 41, 0.12) 0%, rgba(255,255,255,0) 70%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 880px;
            margin: 0 auto;
        }

        .hero-h1 {
            font-size: 38px;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-h1 span {
            color: var(--primary-color);
            background: linear-gradient(135deg, #d90429 0%, #ff4d4f 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-sub {
            font-size: 18px;
            color: var(--text-sub);
            margin-bottom: 36px;
            line-height: 1.6;
        }

        .hero-btns {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            background: var(--bg-card);
            padding: 24px;
            border-radius: var(--radius-main);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .stat-item {
            text-align: center;
        }

        .stat-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary-color);
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-sub);
            margin-top: 4px;
        }

        /* ---------------- About Us & Platform Intro ---------------- */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-main);
        }

        .about-text p {
            font-size: 15px;
            color: var(--text-sub);
            margin-bottom: 16px;
            text-align: justify;
        }

        .feature-bullets {
            list-style: none;
            margin-top: 20px;
        }

        .feature-bullets li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .feature-bullets li::before {
            content: "✓";
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            background: rgba(217, 4, 41, 0.1);
            color: var(--primary-color);
            border-radius: 50%;
            font-weight: bold;
            font-size: 12px;
        }

        .media-box-card {
            background: var(--bg-alt);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-main);
            text-align: center;
        }

        /* ---------------- AIGC Services & Grid ---------------- */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-main);
            padding: 28px 24px;
            transition: all 0.3s ease;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(217, 4, 41, 0.3);
        }

        .service-icon {
            width: 48px;
            height: 48px;
            background: rgba(217, 4, 41, 0.08);
            color: var(--primary-color);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: bold;
            margin-bottom: 18px;
        }

        .service-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }

        /* ---------------- Workflow & Scenarios ---------------- */
        .scenarios-bg {
            background: var(--bg-alt);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .scenario-box {
            background: #ffffff;
            padding: 20px;
            border-radius: 10px;
            border: 1px solid #fee2e2;
        }

        .scenario-box h5 {
            font-size: 16px;
            color: var(--primary-color);
            margin-bottom: 8px;
        }

        .scenario-box p {
            font-size: 13px;
            color: var(--text-sub);
        }

        /* ---------------- Supported Models & Network ---------------- */
        .models-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
        }

        .tag-chip {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
            box-shadow: 0 2px 6px rgba(0,0,0,0.02);
            transition: all 0.2s;
        }

        .tag-chip:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            transform: scale(1.05);
        }

        /* ---------------- Workflow Steps ---------------- */
        .steps-wrapper {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-main);
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 36px;
            height: 36px;
            background: var(--primary-color);
            color: #ffffff;
            font-weight: 800;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px auto;
            font-size: 14px;
        }

        .step-item h5 {
            font-size: 16px;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-sub);
        }

        /* ---------------- Cases Showcase ---------------- */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .case-card {
            background: var(--bg-card);
            border-radius: var(--radius-main);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .case-img-wrap {
            width: 100%;
            overflow: hidden;
            background: #f0f0f0;
        }

        .case-img-wrap img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }

        .case-info {
            padding: 16px;
        }

        .case-info h5 {
            font-size: 15px;
            margin-bottom: 6px;
        }

        .case-info p {
            font-size: 12px;
            color: var(--text-sub);
        }

        /* ---------------- Comparison & Rating ---------------- */
        .rating-banner {
            background: linear-gradient(135deg, #d90429 0%, #990011 100%);
            color: #ffffff;
            padding: 30px;
            border-radius: var(--radius-main);
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .rating-score {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .big-number {
            font-size: 54px;
            font-weight: 900;
            line-height: 1;
            color: #ffec3d;
        }

        .stars-wrap {
            display: flex;
            flex-direction: column;
        }

        .stars {
            color: #ffec3d;
            font-size: 20px;
            letter-spacing: 2px;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
            border-radius: var(--radius-main);
            overflow: hidden;
            border: 1px solid var(--border-color);
            text-align: left;
        }

        .compare-table th, .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        .compare-table th {
            background: #fff0f0;
            color: var(--text-main);
            font-weight: 700;
        }

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

        .highlight-col {
            background: rgba(217, 4, 41, 0.03);
            font-weight: 600;
            color: var(--primary-color);
        }

        /* ---------------- Token Pricing Table ---------------- */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .token-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-main);
            padding: 24px;
            position: relative;
        }

        .token-card.popular {
            border: 2px solid var(--primary-color);
            box-shadow: var(--shadow-hover);
        }

        .token-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--primary-color);
            color: #fff;
            padding: 2px 10px;
            font-size: 11px;
            border-radius: 10px;
            font-weight: bold;
        }

        .token-card h4 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .token-price {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 16px;
        }

        .token-price span {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: normal;
        }

        /* ---------------- Customer Reviews ---------------- */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-main);
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 20px;
            font-style: italic;
            line-height: 1.6;
        }

        .user-meta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .user-avatar-placeholder {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, #ef233c, #d90429);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .user-info h5 {
            font-size: 14px;
            font-weight: 700;
        }

        .user-info p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ---------------- FAQ Accordion ---------------- */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
        }

        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #ffffff;
        }

        .faq-question::after {
            content: "+";
            font-size: 20px;
            color: var(--primary-color);
            transition: transform 0.25s;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            background: var(--bg-alt);
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 16px 24px 20px 24px;
            border-top: 1px solid var(--border-color);
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }

        /* ---------------- Articles & Links Area ---------------- */
        .articles-section {
            background: var(--bg-alt);
            border-top: 1px solid var(--border-color);
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat( auto-fit, minmax(220px, 1fr) );
            gap: 16px;
        }

        .article-link-card {
            background: #ffffff;
            padding: 16px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            font-size: 14px;
            font-weight: 500;
        }

        .article-link-card a {
            color: var(--text-main);
            display: block;
        }

        .article-link-card a:hover {
            color: var(--primary-color);
        }

        /* ---------------- Contact & Agency ---------------- */
        .contact-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-main);
            padding: 40px;
            box-shadow: var(--shadow-sm);
        }

        .contact-info-side h4 {
            font-size: 22px;
            margin-bottom: 16px;
            color: var(--primary-color);
        }

        .contact-detail-list {
            list-style: none;
            margin-bottom: 30px;
        }

        .contact-detail-list li {
            font-size: 14px;
            margin-bottom: 12px;
            color: var(--text-sub);
        }

        .qr-area {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 20px;
            background: var(--bg-alt);
            padding: 16px;
            border-radius: 8px;
        }

        .qr-area img {
            width: 100px;
            height: 100px;
            object-fit: cover;
            border-radius: 6px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .form-control {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s;
        }

        .form-control:focus {
            border-color: var(--primary-color);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 90px;
        }

        /* ---------------- Footer & Friend Links ---------------- */
        .site-footer {
            background: #1a0305;
            color: #d1d5db;
            padding: 60px 0 30px 0;
            font-size: 13px;
            border-top: 4px solid var(--primary-color);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }

        .footer-col h5 {
            color: #ffffff;
            font-size: 15px;
            margin-bottom: 16px;
        }

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

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: #9ca3af;
        }

        .footer-links a:hover {
            color: #ffffff;
        }

        .friend-links-box {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .friend-links-title {
            color: #ffffff;
            font-weight: bold;
        }

        .friend-links-box a {
            color: #9ca3af;
        }

        .friend-links-box a:hover {
            color: var(--accent-warm);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.05);
            color: #6b7280;
        }

        /* ---------------- Responsive Styles ---------------- */
        @media (max-width: 992px) {
            .hero-h1 { font-size: 30px; }
            .hero-stats { grid-template-columns: repeat(2, 1fr); }
            .about-grid, .contact-wrap { grid-template-columns: 1fr; }
            .scenarios-grid, .steps-wrapper, .token-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .menu-toggle { display: block; }
            .nav-links {
                display: none;
                position: absolute;
                top: 76px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-links.active { display: flex; }
            .hero-h1 { font-size: 24px; }
            .hero-sub { font-size: 15px; }
            .scenarios-grid, .steps-wrapper, .token-grid, .reviews-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
        }