/* ==========================================================================
           Reset & Base
           ========================================================================== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
            color: var(--text-main);
            line-height: 1.6;
            background-color: var(--bg-light);
        }

        a {
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }

        /* 优化图片默认行为：不强制拉伸，自适应宽度 */
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        :root {
            /* Colors */
            --primary: #d71920;
            --primary-hover: #b5151a;
            --primary-light: #fdf3f3;
            --text-main: #333333;
            --text-light: #555555;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --border-color: #eaeaea;
            
            /* Layout & Effects */
            --side: 8%;
            --shadow-sm: 0 4px 15px rgba(0, 0, 0, 0.02);
            --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 15px 40px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Accessibility focus state */
        a:focus-visible, button:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }

        .page {
            max-width: 1400px;
            margin: 0 auto;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
        }

        .section {
            padding: 80px var(--side);
        }

        .bg-light {
            background: var(--bg-light);
        }

        /* ==========================================================================
           Hero Section
           ========================================================================== */
        .hero {
            position: relative;
            height: 600px;
            background: #222;
            overflow: hidden;
            display: flex;
            align-items: center;
        }

        .hero img.hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.85;
            z-index: 1;
        }

        .hero-inner {
            position: absolute;
            right: var(--side);
            width: 45%;
            min-width: 420px;
            z-index: 10;
        }

        .hero-content {
            background: var(--bg-white);
            padding: 45px;
            border-left: 8px solid var(--primary);
            box-shadow: var(--shadow-lg);
            border-radius: 0 8px 8px 0;
        }

        .hero-content h1 {
            font-size: 38px;
            line-height: 1.2;
            margin-bottom: 20px;
            color: #111;
        }

        .hero-content h1 span {
            color: var(--primary);
        }

        .hero-content p {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 30px;
        }

        .hero-cta {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: var(--primary);
            color: #fff;
            padding: 15px 35px;
            font-size: 16px;
            font-weight: bold;
            border-radius: 4px;
            transition: var(--transition);
        }

        .hero-cta:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* ==========================================================================
           Section Banner
           ========================================================================== */
        .section-banner {
            background-color: var(--primary);
            color: #ffffff;
            padding: 70px var(--side);
            display: grid;
            grid-template-columns: 640px 1fr;
            align-items: center;
            column-gap: 60px;
            row-gap: 16px;
            overflow: hidden;
        }

        .section-banner h2 {
            font-size: 56px;
            font-weight: 800;
            margin: 0;
            text-transform: uppercase;
            letter-spacing: 1px;
            line-height: 1.1;
            white-space: nowrap;
        }

        .section-banner p {
            font-size: 16px;
            margin: 0;
            line-height: 1.6;
            color: #ffffff;
            max-width: 600px;
            white-space: nowrap;
        }

        /* ==========================================================================
           Section Headers
           ========================================================================== */
        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header .tag {
            display: inline-block;
            color: var(--primary);
            font-weight: 700;
            font-size: 20px; /* Extracted from inline style */
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            color: #111;
            margin-bottom: 15px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-light);
            max-width: 650px;
            margin: 0 auto;
        }

        /* ==========================================================================
           01 Comparison Cards
           ========================================================================== */
        .gen-compare {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .gen-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 35px 30px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .gen-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

        .gen-card.featured {
            border: 2px solid var(--primary);
            background: var(--primary-light);
            position: relative;
            transform: scale(1.03);
            z-index: 2;
        }

        .gen-card.featured:hover {
            transform: scale(1.03) translateY(-5px);
        }

        .badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: bold;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .gen-card h3 {
            font-size: 22px;
            margin-bottom: 5px;
            text-align: center;
            color: #111;
        }

        .gen-card .subtitle {
            color: #666;
            font-size: 14px;
            text-align: center;
            margin-bottom: 25px;
            font-weight: 500;
        }

        .feature-list {
            list-style: none;
            flex-grow: 1;
        }

        .feature-list li {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            line-height: 1.4;
        }

        .feature-list li.bad { color: #666; }
        .feature-list li.good { color: #111; font-weight: 600; }
        
        /* Icons */
        .icon-svg {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .icon-success { color: #28a745; }
        .icon-warning { color: #dc3545; }

        /* ==========================================================================
           02 Zig-Zag Core Advantages
           ========================================================================== */
        .zig-zag-row {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 90px;
        }

        .zig-zag-row:last-child {
            margin-bottom: 0;
        }

        .zig-zag-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .zz-img {
            flex: 1;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--bg-white);
        }

        .zz-img img {
            width: 100%;
            min-height: 350px;
            object-fit: cover;
            transition: var(--transition);
        }

        .zz-img:hover img {
            transform: scale(1.02);
        }

        .zz-text {
            flex: 1;
        }

        .zz-text h3 {
            font-size: 26px;
            color: #111;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 15px;
            font-weight: 700;
        }

        .zz-text h3 span {
            background: var(--primary);
            color: #fff;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 16px;
            flex-shrink: 0;
        }

        .zz-text p {
            color: var(--text-light);
            margin-bottom: 25px;
            font-size: 16px;
        }

        .zz-bullets {
            list-style: none;
        }

        .zz-bullets li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            color: #222;
            font-weight: 500;
            font-size: 15px;
        }

        .zz-bullets li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: -2px;
            color: var(--primary);
            font-weight: bold;
            font-size: 18px;
        }

        /* ==========================================================================
           03 Applications
           ========================================================================== */
        .applications {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .app-card {
            background: var(--bg-white);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .app-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-md);
        }

        .app-img-wrap {
            height: 220px;
            overflow: hidden;
            border-bottom: 3px solid var(--primary);
        }

        .app-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease, filter 0.6s ease;
            filter: brightness(1.12) contrast(1.08) saturate(1.1);
        }

        .app-card:hover .app-img-wrap img {
            transform: scale(1.05);
            filter: brightness(1.18) contrast(1.12) saturate(1.15);
        }

        .app-content {
            padding: 24px 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .app-content h3 {
            font-size: 18px;
            margin: 0;
            font-weight: 700;
            color: #111;
            text-align: center;
            flex-grow: 1;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ==========================================================================
           04 Timeline
           ========================================================================== */
        .process-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
            margin-top: 40px;
            z-index: 1;
            align-items: stretch;
        }

        .process-step {
            background: var(--bg-white);
            padding: 28px 18px 22px;
            border: 1px solid #e5e5e5;
            border-radius: 8px;
            text-align: center;
            position: relative;
            transition: var(--transition);
            border-top: 3px solid #e5e5e5;
            z-index: 2;
            margin: 0 12px;
        }

        .process-step:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-top-color: var(--primary);
        }

        .process-step:last-child {
            border-top-color: var(--primary);
        }

        .process-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            display: block;
        }

        .step-number {
            position: absolute;
            top: 14px;
            right: 16px;
            font-size: 12px;
            font-weight: 700;
            color: #aaa;
            letter-spacing: 0.5px;
        }

        .process-step:last-child .step-number {
            color: var(--primary);
        }

        .process-step h3 {
            font-size: 15px;
            margin-bottom: 10px;
            color: #111;
            font-weight: 700;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
        }

        .process-step:not(:last-child)::after {
            content: "→";
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 20px;
            color: var(--primary);
            font-weight: bold;
            z-index: 3;
        }

        /* ==========================================================================
           Responsive Design
           ========================================================================== */
        @media (max-width: 1024px) {
            .gen-compare { grid-template-columns: 1fr; }
            .gen-card.featured { transform: none; }
            .gen-card.featured:hover { transform: translateY(-5px); }
            
            .zig-zag-row, 
            .zig-zag-row:nth-child(even) { 
                flex-direction: column; 
                gap: 40px; 
            }
            .zz-img { width: 100%; }
            .zz-img img { min-height: 250px; }
            
            .applications { grid-template-columns: repeat(2, 1fr); }
            
            .process-timeline { grid-template-columns: repeat(2, 1fr); gap: 30px; margin-top: 20px; }
            .process-step { margin: 0; }
            .process-step:not(:last-child)::after { display: none; }
            
            .hero-inner {
                width: 60%;
                min-width: 320px;
            }
        }

        @media (max-width: 768px) {
            .section-banner {
                grid-template-columns: 1fr;
                padding: 40px 5%;
                row-gap: 12px;
            }
            .section-banner h2 {
                font-size: 36px;
                white-space: normal;
            }
            .section-banner p {
                white-space: normal;
            }

            .section { padding: 60px 5%; }
            .section-header h2 { font-size: 28px; }
            
            .applications, 
            .process-timeline { grid-template-columns: 1fr; }
            
            .hero { height: auto; padding: 60px 0; }
            .hero img.hero-bg { position: absolute; inset: 0; }
            .hero-inner { 
                width: 90%; 
                right: 0; 
                left: 5%; 
                position: relative; 
                top: auto; 
                transform: none; 
                margin: 0 auto; 
            }
            .hero-content {
                padding: 30px;
                border-radius: 8px;
            }
            .hero-content h1 { font-size: 30px; }
        }