:root {
            --h187-primary: #f39c12;
            --h187-primary-dark: #e67e22;
            --h187-secondary: #2c3e50;
            --h187-accent: #3498db;
            --h187-bg-light: #fdfdfd;
            --h187-bg-dark: #1a1a1a;
            --h187-text-main: #333333;
            --h187-text-muted: #666666;
            --h187-white: #ffffff;
            --h187-gap: 8px;
            --h187-radius: 16px;
            --h187-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --h187-container-width: 1300px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--h187-bg-light);
            color: var(--h187-text-main);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏设计 */
        .h187-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
        }

        .h187-nav-container {
            max-width: var(--h187-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }

        .h187-logo {
            flex: 0 0 auto;
            display: flex;
            align-items: center;
        }

        .h187-logo img {
            height: 40px;
            width: auto;
            object-fit: contain;
        }

        .h187-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
        }

        .h187-nav-menu li {
            min-width: 0;
        }

        .h187-nav-menu a {
            text-decoration: none;
            color: var(--h187-secondary);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s ease;
            position: relative;
            padding: 8px 0;
        }

        .h187-nav-menu a:hover {
            color: var(--h187-primary);
        }

        .h187-nav-menu a.active {
            color: var(--h187-primary);
        }

        .h187-nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--h187-primary);
        }

        /* Hero 区：对角线分割设计 */
        .h187-hero {
            padding: 160px 24px 100px;
            background: linear-gradient(135deg, #2c3e50 0%, #000000 100%);
            color: var(--h187-white);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            text-align: center;
        }

        .h187-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><rect width="1" height="1" fill="rgba(255,255,255,0.05)"/></svg>');
            opacity: 0.3;
        }

        .h187-hero-content {
            max-width: 900px;
            position: relative;
            z-index: 2;
            min-width: 0;
        }

        .h187-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            line-height: 1.2;
            margin-bottom: 24px;
            font-weight: 800;
            letter-spacing: -1px;
            word-break: keep-all;
        }

        .h187-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.4rem);
            color: rgba(255,255,255,0.8);
            margin-bottom: 48px;
            font-weight: 300;
        }

        /* 导出模式展示：Grid布局 */
        .h187-modes-section {
            padding: 96px 24px;
            max-width: var(--h187-container-width);
            margin: 0 auto;
        }

        .h187-section-label {
            display: inline-block;
            background: rgba(243, 156, 18, 0.1);
            color: var(--h187-primary);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .h187-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .h187-mode-card {
            background: var(--h187-white);
            border: 1px solid #eee;
            border-radius: var(--h187-radius);
            padding: 40px;
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .h187-mode-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            border-color: var(--h187-primary);
        }

        .h187-mode-type {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--h187-secondary);
        }

        .h187-capabilities {
            list-style: none;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .h187-capabilities li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 12px;
            font-size: 15px;
            color: var(--h187-text-muted);
        }

        .h187-capabilities li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--h187-primary);
            font-weight: bold;
        }

        .h187-algorithmic-edge {
            background: #fcf8f2;
            padding: 16px;
            border-left: 4px solid var(--h187-primary);
            font-size: 14px;
            font-style: italic;
            color: #856404;
        }

        /* 报告工作流：错位卡片流 */
        .h187-workflow-section {
            background: #f4f7f9;
            padding: 96px 24px;
        }

        .h187-workflow-container {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .h187-workflow-item {
            flex: 1 1 calc(50% - 40px);
            background: var(--h187-white);
            padding: 48px;
            border-radius: var(--h187-radius);
            box-shadow: var(--h187-shadow);
            min-width: 300px;
        }

        .h187-workflow-item:nth-child(even) {
            margin-top: 40px;
        }

        .h187-workflow-scenario {
            font-size: 18px;
            font-weight: 600;
            color: var(--h187-primary);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .h187-workflow-app {
            font-size: 20px;
            color: var(--h187-secondary);
            font-weight: 500;
        }

        /* 动态内容区 */
        .h187-dynamic-section {
            padding: 96px 24px;
            max-width: var(--h187-container-width);
            margin: 0 auto;
            text-align: center;
        }

        .h187-article-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
            margin-top: 40px;
        }

        .h187-article-card {
            flex: 1 1 300px;
            padding: 24px;
            border-bottom: 2px solid #eee;
            text-align: left;
            transition: border-color 0.3s;
            min-width: 0;
        }

        .h187-article-card:hover {
            border-color: var(--h187-primary);
        }

        /* 页脚设计 */
        .h187-footer {
            background: var(--h187-bg-dark);
            color: rgba(255,255,255,0.6);
            padding: 80px 24px 40px;
        }

        .h187-footer-inner {
            max-width: var(--h187-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .h187-footer-brand {
            flex: 1 1 300px;
            min-width: 0;
        }

        .h187-footer-brand h3 {
            color: var(--h187-white);
            font-size: 28px;
            margin-bottom: 20px;
        }

        .h187-footer-links {
            flex: 1 1 200px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            min-width: 0;
        }

        .h187-footer-links a {
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            transition: color 0.3s;
        }

        .h187-footer-links a:hover {
            color: var(--h187-primary);
        }

        .h187-copyright {
            width: 100%;
            text-align: center;
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 14px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .h187-nav-container {
                height: auto;
                padding: 16px;
            }
            .h187-nav-menu {
                width: 100%;
                justify-content: center;
                gap: 12px;
                margin-top: 16px;
            }
            .h187-hero {
                padding: 120px 16px 60px;
            }
            .h187-grid {
                grid-template-columns: 1fr;
            }
            .h187-workflow-item {
                flex: 1 1 100%;
            }
            .h187-workflow-item:nth-child(even) {
                margin-top: 0;
            }
        }