:root {
            --green-deep: #0f5a49;
            --green-mid: #1e6f5c;
            --green-light: #289672;
            --green-pale: #e6f4ef;
            --green-surface: #f4faf7;
            --text-primary: #1a2c3e;
            --text-secondary: #2c4b5f;
            --text-muted: #4a6a7a;
            --white: #ffffff;
            --card-shadow: 0 6px 24px rgba(0,0,0,0.04);
            --card-hover-shadow: 0 20px 40px -12px rgba(15,90,73,0.14);
            --radius-xl: 32px;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-full: 60px;
            --transition: 0.22s cubic-bezier(0.4,0,0.2,1);
        }
        *{margin:0;padding:0;box-sizing:border-box;}
        html{scroll-behavior:smooth;}
        body{
            font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue','Noto Sans SC',sans-serif;
            background:linear-gradient(165deg,#f6faf8 0%,#edf4f0 30%,#f8fbf9 70%,#eef5f1 100%);
            background-attachment:fixed;
            color:var(--text-primary);
            line-height:1.6;
            -webkit-font-smoothing:antialiased;
        }
        .container{max-width:1240px;margin:0 auto;padding:0 24px;}

        /* HEADER */
        header{
            background:rgba(255,255,255,0.88);
            backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
            position:sticky;top:0;z-index:100;
            border-bottom:1px solid rgba(30,111,92,0.08);
            box-shadow:0 1px 8px rgba(0,0,0,0.03);
        }
        .nav-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:14px 0;gap:16px;}
        .logo-area{display:flex;align-items:center;gap:10px;flex-shrink:0;}
        .logo-icon{font-size:30px;font-weight:900;background:linear-gradient(135deg,#1e6f5c,#289672);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;}
        .logo-text{font-weight:750;font-size:1.55rem;letter-spacing:-0.4px;background:linear-gradient(135deg,#1a3b34,#1e6f5c);-webkit-background-clip:text;background-clip:text;color:transparent;}
        .nav-links{display:flex;gap:10px;align-items:center;flex-wrap:wrap;list-style:none;}
        .nav-links a{text-decoration:none;font-weight:520;color:var(--text-secondary);transition:var(--transition);font-size:0.95rem;padding:7px 15px;border-radius:24px;white-space:nowrap;}
        .nav-links a:hover,.nav-links a.active{color:var(--green-mid);background:rgba(30,111,92,0.06);}
        .nav-links a.active{font-weight:650;background:rgba(30,111,92,0.1);}
        .nav-download-btn{background:var(--green-mid);color:#fff!important;padding:8px 20px;border-radius:40px;font-weight:620;box-shadow:0 2px 10px rgba(30,111,92,0.25);}
        .nav-download-btn:hover{background:var(--green-deep);box-shadow:0 6px 18px rgba(15,90,73,0.35);transform:translateY(-2px);}

        /* HERO */
        .hero-faq{padding:48px 0 32px;text-align:center;}
        .hero-faq .badge-row{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:16px;}
        .hero-faq .badge-tag{background:rgba(30,111,92,0.08);padding:6px 16px;border-radius:30px;font-size:0.8rem;font-weight:580;color:var(--green-mid);border:1px solid rgba(30,111,92,0.12);}
        .hero-faq h1{font-size:clamp(1.9rem,3.8vw,2.8rem);font-weight:850;background:linear-gradient(145deg,#143829 0%,#1e6f5c 55%,#289672 100%);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px;letter-spacing:-0.5px;line-height:1.25;}
        .hero-faq .hero-sub{font-size:1.05rem;color:var(--text-muted);max-width:720px;margin:0 auto 20px;line-height:1.65;}
        .hero-faq .hero-sub strong{color:var(--green-mid);}

        /* CATEGORY TABS */
        .category-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:40px;}
        .category-tabs a{text-decoration:none;padding:10px 20px;border-radius:30px;font-weight:580;font-size:0.9rem;background:#fff;color:var(--text-secondary);border:1.5px solid #dce8e3;transition:var(--transition);white-space:nowrap;}
        .category-tabs a:hover,.category-tabs a.active-tab{border-color:var(--green-mid);background:var(--green-pale);color:var(--green-deep);}

        /* FAQ CATEGORY SECTION */
        .faq-category{margin-bottom:40px;}
        .faq-category h2{font-size:1.6rem;font-weight:700;color:#1e5a4f;margin-bottom:20px;display:flex;align-items:center;gap:10px;border-bottom:2px solid var(--green-pale);padding-bottom:10px;}
        .faq-category h2 .cat-icon{font-size:1.5rem;}

        /* FAQ ITEMS */
        .faq-item{background:#fff;border-radius:var(--radius-md);margin-bottom:12px;box-shadow:0 2px 8px rgba(0,0,0,0.02);border:1px solid rgba(0,0,0,0.03);transition:var(--transition);}
        .faq-item:hover{border-color:#d4ebe2;box-shadow:var(--card-shadow);}
        .faq-item summary{list-style:none;cursor:pointer;padding:18px 20px;font-weight:650;color:var(--text-primary);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:1rem;transition:color 0.2s;}
        .faq-item summary::-webkit-details-marker{display:none;}
        .faq-item summary::after{content:'＋';font-size:1.4rem;color:var(--green-mid);font-weight:400;transition:transform 0.3s;flex-shrink:0;}
        .faq-item[open] summary::after{content:'−';transform:rotate(180deg);}
        .faq-item[open] summary{color:var(--green-mid);}
        .faq-item .faq-body{padding:0 20px 20px;font-size:0.92rem;color:#4a6a7a;line-height:1.7;}
        .faq-item .faq-body p{margin-bottom:12px;}
        .faq-item .faq-body a{color:var(--green-mid);font-weight:600;text-decoration:none;}
        .faq-item .faq-body a:hover{text-decoration:underline;}
        .faq-item .faq-body .faq-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px;}
        .faq-item .faq-body .faq-tags span{font-size:0.72rem;background:var(--green-pale);color:#1e6f5c;padding:3px 10px;border-radius:14px;}

        /* BOTTOM CTA */
        .bottom-cta-section{padding:30px 0 50px;}
        .bottom-cta{background:linear-gradient(145deg,#0f3d30 0%,#1a5c48 40%,#1e6f5c 100%);border-radius:var(--radius-xl);padding:44px 28px;text-align:center;color:#fff;box-shadow:0 18px 40px -10px rgba(15,90,73,0.35);position:relative;overflow:hidden;}
        .bottom-cta::after{content:'';position:absolute;top:-50%;right:-20%;width:350px;height:350px;background:radial-gradient(circle,rgba(255,255,255,0.06) 0%,transparent 70%);border-radius:50%;pointer-events:none;}
        .bottom-cta h2{font-size:clamp(1.5rem,2.8vw,2rem);font-weight:750;margin-bottom:10px;position:relative;z-index:1;}
        .bottom-cta p{font-size:0.95rem;opacity:0.9;max-width:560px;margin:0 auto 22px;position:relative;z-index:1;}
        .bottom-cta .btn-cta-large{display:inline-flex;align-items:center;gap:10px;background:#fff;color:var(--green-deep);padding:14px 36px;border-radius:50px;font-weight:700;font-size:1.05rem;text-decoration:none;transition:var(--transition);position:relative;z-index:1;box-shadow:0 6px 22px rgba(0,0,0,0.2);cursor:pointer;}
        .bottom-cta .btn-cta-large:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,0,0,0.3);background:#f0faf6;}
        .bottom-cta .cta-sub-links{margin-top:18px;display:flex;flex-wrap:wrap;justify-content:center;gap:18px;position:relative;z-index:1;font-size:0.9rem;}
        .bottom-cta .cta-sub-links a{color:#c8e8db;text-decoration:none;font-weight:520;transition:var(--transition);}
        .bottom-cta .cta-sub-links a:hover{color:#fff;text-decoration:underline;}

        /* FOOTER */
        .footer{background:#0b241e;color:#b0d3c6;padding:44px 0 20px;border-top-left-radius:28px;border-top-right-radius:28px;}
        .footer-content{display:flex;flex-wrap:wrap;justify-content:space-between;gap:28px;}
        .footer-content h4{color:#e2f5ec;margin-bottom:10px;font-size:1rem;}
        .footer-content p{font-size:0.85rem;line-height:1.6;}
        .footer-content a{color:#b0d3c6;text-decoration:none;transition:var(--transition);}
        .footer-content a:hover{color:#fff;text-decoration:underline;}
        .footer-copyright{text-align:center;padding-top:30px;font-size:0.8rem;border-top:1px solid #2d554a;margin-top:18px;opacity:0.75;}

        /* RESPONSIVE */
        @media(max-width:900px){
            .nav-bar{flex-direction:column;align-items:flex-start;}
            .nav-links{gap:4px;flex-wrap:wrap;}
            .nav-links a{font-size:0.85rem;padding:6px 10px;}
            .hero-faq h1{font-size:1.7rem;}
            .faq-item summary{font-size:0.95rem;padding:15px;}
            .faq-item .faq-body{padding:0 15px 15px;}
        }
        @media(max-width:480px){
            .hero-faq h1{font-size:1.45rem;}
            .faq-category h2{font-size:1.3rem;}
            .bottom-cta{padding:30px 16px;}
            .bottom-cta h2{font-size:1.3rem;}
        }