:root {
            --green-primary: #00A86B;
            --green-deep: #0B3D2E;
            --green-soft: #E6F7F1;
            --green-mid: #C2EBDD;
            --text-main: #1A2E28;
            --text-muted: #5A6B65;
            --bg-page: #F7FAF9;
            --bg-card: #FFFFFF;
            --border-light: #E2EBE7;
            --shadow-sm: 0 1px 3px rgba(11, 61, 46, 0.06);
            --shadow-md: 0 8px 24px rgba(11, 61, 46, 0.08);
            --radius-md: 12px;
            --radius-lg: 20px;
        }

        html { scroll-behavior: smooth; }
        * { margin: 0; padding: 0; box-sizing: border-box; }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.55;
            -webkit-font-smoothing: antialiased;
        }

        a { color: var(--green-primary); text-decoration: none; }
        a:hover { text-decoration: underline; }

        .container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

        /* 导航 */
        .nav {
            position: sticky; top: 0; z-index: 100;
            background: rgba(255,255,255,.92); backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
        }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 56px; }
        .logo { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 18px; color: var(--green-deep); }
        .logo-img { display: block; width: 30px; height: 30px; border-radius: 8px; flex-shrink: 0; }
        .nav-links { display: flex; gap: 22px; font-size: 13.5px; }
        .nav-links a { color: var(--text-muted); transition: color .2s; }
        .nav-links a:hover, .nav-links a:focus-visible { color: var(--green-primary); text-decoration: none; }
        .nav-cta {
            display: inline-flex; align-items: center; padding: 7px 16px; border-radius: 999px;
            background: var(--green-primary); color: #fff !important; font-size: 13px; font-weight: 600;
            text-decoration: none !important;
        }

        /* Hero */
        .hero { padding: 52px 0 40px; background: linear-gradient(180deg, var(--green-soft) 0%, var(--bg-page) 100%); }
        .hero-eyebrow {
            display: inline-flex; align-items: center; gap: 8px; padding: 5px 14px; border-radius: 999px;
            background: #fff; border: 1px solid var(--green-mid); font-size: 12.5px; font-weight: 600;
            color: var(--green-primary); letter-spacing: .04em;
        }
        .hero h1 {
            margin-top: 18px; font-size: clamp(30px, 5vw, 44px); line-height: 1.22;
            font-weight: 800; color: var(--green-deep); letter-spacing: -.02em;
        }
        .hero h1 span { color: var(--green-primary); }
        .hero-sub { margin-top: 14px; max-width: 640px; font-size: 16px; line-height: 1.6; color: var(--text-muted); }
        .hero-actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 12px; }
        .btn-primary {
            display: inline-flex; align-items: center; padding: 11px 24px; border-radius: 10px;
            background: var(--green-primary); color: #fff; font-size: 15px; font-weight: 600;
            text-decoration: none; box-shadow: 0 4px 14px rgba(0,168,107,.25);
        }
        .btn-ghost {
            display: inline-flex; align-items: center; padding: 11px 20px; border-radius: 10px;
            border: 1px solid var(--border-light); background: #fff; color: var(--green-deep);
            font-size: 14px; font-weight: 600; text-decoration: none;
        }
        .hero-meta { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 20px; font-size: 13px; color: var(--text-muted); }
        .hero-meta span::before { content: "✓"; color: var(--green-primary); font-weight: 700; margin-right: 6px; }

        /* Section */
        .section { padding: 40px 0; scroll-margin-top: 72px; }
        .section-alt { background: #fff; }
        .section-head { max-width: 640px; margin-bottom: 26px; }
        .section-label {
            font-size: 12px; font-weight: 700; letter-spacing: .12em;
            text-transform: uppercase; color: var(--green-primary);
        }
        .section-head h2 {
            margin-top: 6px; font-size: clamp(24px, 3.5vw, 31px); font-weight: 800;
            line-height: 1.3; color: var(--green-deep);
        }
        .section-head p { margin-top: 8px; color: var(--text-muted); font-size: 15px; line-height: 1.55; }

        /* 介绍 */
        .intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: start; }
        .intro-body h2 { font-size: clamp(24px,3.5vw,31px); font-weight: 800; color: var(--green-deep); margin: 6px 0 12px; }
        .intro-body p { color: var(--text-muted); margin-bottom: 10px; font-size: 15px; line-height: 1.55; }
        .intro-body p:last-of-type { margin-bottom: 0; }
        .intro-body strong { color: var(--green-deep); }
        .content-note {
            margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--border-light);
            font-size: 12.5px; color: var(--text-muted); line-height: 1.55;
        }
        .intro-card {
            background: var(--green-deep); border-radius: var(--radius-lg);
            padding: 24px; color: #E8F5F0; box-shadow: var(--shadow-md);
        }
        .intro-card h3 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .intro-card ul { list-style: none; display: grid; gap: 10px; }
        .intro-card li { display: flex; gap: 10px; font-size: 13.8px; line-height: 1.5; color: #C9E5DB; }
        .intro-card li::before { content: "→"; color: #4ADE80; flex-shrink: 0; font-weight: 700; }

        /* 功能 */
        .feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
        .feature-card {
            background: var(--bg-card); border: 1px solid var(--border-light);
            border-radius: var(--radius-md); padding: 20px; box-shadow: var(--shadow-sm);
        }
        .feature-icon {
            width: 36px; height: 36px; border-radius: 9px; background: var(--green-soft);
            color: var(--green-primary); display: flex; align-items: center; justify-content: center;
            font-size: 17px; margin-bottom: 12px;
        }
        .feature-card h3 { font-size: 15px; font-weight: 700; color: var(--green-deep); margin-bottom: 5px; line-height: 1.35; }
        .feature-card p { font-size: 13.6px; color: var(--text-muted); line-height: 1.5; }

        /* 理由 */
        .reason-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
        .reason-item {
            display: flex; gap: 14px; padding: 18px 20px; background: #fff;
            border: 1px solid var(--border-light); border-radius: var(--radius-md);
        }
        .reason-num {
            flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%;
            background: var(--green-primary); color: #fff; display: flex;
            align-items: center; justify-content: center; font-size: 12.5px; font-weight: 700;
        }
        .reason-item h3 { font-size: 15px; font-weight: 700; color: var(--green-deep); margin-bottom: 4px; line-height: 1.35; }
        .reason-item p { font-size: 13.6px; color: var(--text-muted); line-height: 1.5; }

        /* 场景 */
        .scene-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
        .scene-card { background: var(--green-soft); border-radius: var(--radius-md); padding: 18px; border: 1px solid transparent; }
        .scene-card .tag { display: inline-block; font-size: 11px; font-weight: 700; color: var(--green-primary); letter-spacing: .06em; margin-bottom: 6px; }
        .scene-card h3 { font-size: 14.5px; font-weight: 700; color: var(--green-deep); margin-bottom: 5px; line-height: 1.35; }
        .scene-card p { font-size: 13.4px; color: var(--text-muted); line-height: 1.5; }

        /* 步骤 */
        .steps { display: grid; grid-template-columns: repeat(4,1fr); }
        .step { position: relative; padding-right: 18px; }
        .step:last-child { padding-right: 0; }
        .step-num {
            width: 36px; height: 36px; border-radius: 50%; background: var(--green-deep);
            color: #fff; display: flex; align-items: center; justify-content: center;
            font-size: 14px; font-weight: 700; margin-bottom: 12px; position: relative; z-index: 1;
        }
        .step::after {
            content: ""; position: absolute; top: 17px; left: 44px; right: -8px;
            height: 2px; background: var(--green-mid); z-index: 0;
        }
        .step:last-child::after { display: none; }
        .step h3 { font-size: 14.5px; font-weight: 700; color: var(--green-deep); margin-bottom: 4px; line-height: 1.35; }
        .step p { font-size: 13.2px; color: var(--text-muted); line-height: 1.5; }

        /* 表格 */
        .compare-wrap { overflow-x: auto; }
        table.compare {
            width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px;
            background: #fff; border-radius: var(--radius-md); overflow: hidden;
            border: 1px solid var(--border-light); min-width: 720px;
        }
        table.compare thead th {
            background: var(--green-deep); color: #fff; text-align: left;
            padding: 12px 16px; font-weight: 600; font-size: 13.5px; line-height: 1.35;
        }
        table.compare tbody td {
            padding: 11px 16px; border-bottom: 1px solid var(--border-light);
            vertical-align: top; color: var(--text-muted); line-height: 1.5;
        }
        table.compare tbody tr:last-child td { border-bottom: none; }
        table.compare tbody td:first-child { font-weight: 700; color: var(--green-deep); background: var(--bg-page); white-space: nowrap; }

        /* FAQ 答案优先结构（折叠修复） */
        .faq-list { max-width: 820px; }
        .faq-item { border-bottom: 1px solid var(--border-light); padding: 16px 0; }
        .faq-item h3 { font-size: 15px; font-weight: 700; color: var(--green-deep); line-height: 1.4; margin-bottom: 8px; }
        .faq-answer-short { font-size: 14px; color: var(--text-main); line-height: 1.6; margin-bottom: 6px; }
        .faq-detail { margin-top: 4px; }
        .faq-detail summary {
            list-style: none;
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            color: var(--green-primary);
            padding: 4px 0;
            display: inline-block;
            user-select: none;
        }
        .faq-detail summary::-webkit-details-marker { display: none; }
        .faq-detail summary::marker { content: ""; }
        .faq-detail .toggle-open { display: none; }
        .faq-detail[open] .toggle-closed { display: none; }
        .faq-detail[open] .toggle-open { display: inline; }
        .faq-detail p { padding-top: 6px; font-size: 13.5px; color: var(--text-muted); line-height: 1.6; }

        /* CTA */
        .cta-band {
            background: var(--green-deep); border-radius: var(--radius-lg);
            padding: 38px 32px; text-align: center; color: #fff; margin: 8px 0 40px;
        }
        .cta-band h2 { font-size: clamp(22px,3vw,28px); font-weight: 800; line-height: 1.3; margin-bottom: 6px; }
        .cta-band p { color: #B8D9CD; font-size: 14.5px; margin-bottom: 20px; }
        .cta-band .btn-primary { background: #fff; color: var(--green-deep); box-shadow: none; }

        footer { border-top: 1px solid var(--border-light); padding: 20px 0 28px; font-size: 12.5px; color: var(--text-muted); line-height: 1.5; }
        footer .foot-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; }

        @media (max-width: 900px) {
            .intro-grid { grid-template-columns: 1fr; gap: 24px; }
            .feature-grid { grid-template-columns: repeat(2,1fr); }
            .scene-grid { grid-template-columns: repeat(2,1fr); }
            .reason-list { grid-template-columns: 1fr; }
            .steps { grid-template-columns: repeat(2,1fr); gap: 22px 0; }
            .step::after { display: none; }
        }
        @media (max-width: 600px) {
            .nav-links { display: none; }
            .feature-grid, .scene-grid { grid-template-columns: 1fr; }
            .steps { grid-template-columns: 1fr; gap: 18px; }
            .hero { padding: 36px 0 28px; }
            .section { padding: 28px 0; scroll-margin-top: 64px; }
            .section-head { margin-bottom: 20px; }
            .cta-band { padding: 28px 18px; margin-bottom: 28px; }
        }
        @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }