/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #2d8a4e;
            --primary-dark: #1a6b36;
            --primary-light: #4aad6a;
            --primary-bg: #eaf5ee;
            --accent: #f5a623;
            --accent-dark: #e08f1a;
            --accent-light: #fff3e0;
            --bg: #f7faf8;
            --bg-card: #ffffff;
            --text: #1a2a1a;
            --text-light: #5b6b5b;
            --text-muted: #8a9a8a;
            --border: #dce8dc;
            --border-light: #eef5ee;
            --shadow-sm: 0 2px 8px rgba(45, 138, 78, 0.06);
            --shadow-md: 0 6px 24px rgba(45, 138, 78, 0.08);
            --shadow-lg: 0 12px 40px rgba(45, 138, 78, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --nav-height: 72px;
            --container: 1200px;
            --gap: 24px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.20);
            transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
            border-bottom-color: var(--border-light);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 var(--gap);
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            transition: color var(--transition);
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .site-header.scrolled .site-logo {
            color: var(--text);
        }
        .site-logo:hover {
            color: var(--accent);
        }

        /* Nav Links */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            transition: background var(--transition), color var(--transition);
        }
        .site-header.scrolled .nav-links a {
            color: var(--text-light);
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
        }
        .site-header.scrolled .nav-links a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-links a.active {
            background: rgba(255, 255, 255, 0.22);
            color: #fff;
            font-weight: 600;
        }
        .site-header.scrolled .nav-links a.active {
            background: var(--primary);
            color: #fff;
        }
        .nav-links a i {
            font-size: 0.85rem;
        }

        /* Nav CTA */
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 40px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .nav-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35);
        }
        .site-header.scrolled .nav-cta {
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.25);
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.15);
            cursor: pointer;
            transition: background var(--transition);
            border: none;
            padding: 0;
        }
        .site-header.scrolled .hamburger {
            background: var(--border-light);
        }
        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            margin: 3px 0;
            transition: transform var(--transition), opacity var(--transition);
        }
        .site-header.scrolled .hamburger span {
            background: var(--text);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(5px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-5px) rotate(-45deg);
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            padding: 16px var(--gap);
            z-index: 999;
            transform: translateY(-110%);
            opacity: 0;
            transition: transform 0.4s ease, opacity 0.4s ease;
        }
        .mobile-nav.open {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: var(--text);
            transition: background var(--transition), color var(--transition);
        }
        .mobile-nav a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: var(--primary);
            color: #fff;
        }
        .mobile-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
        }
        .mobile-nav .mobile-cta {
            margin-top: 8px;
            background: var(--accent);
            color: #fff;
            border-radius: 40px;
            justify-content: center;
            font-weight: 600;
        }
        .mobile-nav .mobile-cta:hover {
            background: var(--accent-dark);
            color: #fff;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 120px var(--gap) 80px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 42, 26, 0.70) 0%, rgba(26, 42, 26, 0.30) 60%, rgba(26, 42, 26, 0.10) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg), transparent);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 820px;
            text-align: center;
            color: #fff;
            animation: heroFadeIn 1s ease-out;
        }
        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(30px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.20);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 1px;
            margin-bottom: 28px;
            color: rgba(255, 255, 255, 0.90);
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.20);
        }
        .hero h1 span {
            color: var(--accent);
        }
        .hero p {
            font-size: 1.2rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 36px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn-primary {
            padding: 16px 40px;
            border-radius: 50px;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 8px 30px rgba(245, 166, 35, 0.35);
        }
        .hero-actions .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(245, 166, 35, 0.45);
            color: #fff;
        }
        .hero-actions .btn-secondary {
            padding: 16px 36px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: background var(--transition), transform var(--transition);
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.22);
            transform: translateY(-3px);
            color: #fff;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px 48px;
            justify-content: center;
            margin-top: 48px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            display: block;
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.70);
            margin-top: 2px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .section-header .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 18px;
            border-radius: 40px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .section-header .section-tag i {
            font-size: 0.75rem;
        }

        /* ===== About / Intro ===== */
        .about-section {
            background: #fff;
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .about-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .about-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .about-image:hover img {
            transform: scale(1.03);
        }
        .about-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(45, 138, 78, 0.10), transparent);
        }
        .about-text h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }
        .about-text p {
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 20px;
        }
        .about-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            background: var(--primary-bg);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
        }
        .about-features li i {
            color: var(--primary);
            font-size: 0.85rem;
        }

        /* ===== Categories ===== */
        .categories-section {
            background: var(--bg);
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .category-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            cursor: pointer;
            border: 1px solid var(--border-light);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .category-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .card-img img {
            transform: scale(1.06);
        }
        .category-card .card-img .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 5px 14px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.90);
            backdrop-filter: blur(4px);
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
        }
        .category-card .card-body {
            padding: 22px 24px 24px;
        }
        .category-card .card-body h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .category-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .category-card .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            transition: gap var(--transition);
        }
        .category-card .card-body .card-link:hover {
            gap: 12px;
        }

        /* ===== Latest Posts (CMS) ===== */
        .posts-section {
            background: #fff;
        }
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--gap);
        }
        .post-card {
            display: flex;
            background: var(--bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .post-card .post-thumb {
            width: 200px;
            min-height: 160px;
            flex-shrink: 0;
            overflow: hidden;
        }
        .post-card .post-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .post-card:hover .post-thumb img {
            transform: scale(1.05);
        }
        .post-card .post-info {
            padding: 20px 22px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .post-card .post-meta .post-cat {
            padding: 3px 12px;
            border-radius: 40px;
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.7rem;
        }
        .post-card .post-info h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .post-info h4 a {
            color: var(--text);
        }
        .post-card .post-info h4 a:hover {
            color: var(--primary);
        }
        .post-card .post-info p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .post-card .post-info .post-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            background: var(--bg);
            border-radius: var(--radius-md);
            color: var(--text-muted);
            font-size: 1rem;
        }
        .posts-empty i {
            font-size: 2.4rem;
            color: var(--border);
            display: block;
            margin-bottom: 12px;
        }

        /* ===== Stats / Data ===== */
        .stats-section {
            background: var(--primary);
            color: #fff;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .stats-grid .stat-card {
            padding: 20px 16px;
        }
        .stats-grid .stat-card .stat-icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .stats-grid .stat-card .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            display: block;
            margin-bottom: 4px;
        }
        .stats-grid .stat-card .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
        }

        /* ===== Process / Flow ===== */
        .process-section {
            background: var(--bg);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--primary), var(--accent), var(--primary));
            z-index: 0;
            opacity: 0.4;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            background: #fff;
            padding: 32px 20px 28px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .process-step .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(45, 138, 78, 0.25);
        }
        .process-step .step-number.accent {
            background: var(--accent);
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.30);
        }
        .process-step h5 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: #fff;
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            background: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition), color var(--transition);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 240px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            color: #fff;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.80);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .cta-content .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 50px;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            font-size: 1.05rem;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
        }
        .cta-content .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
            color: var(--primary-dark);
        }
        .cta-contact {
            display: flex;
            flex-wrap: wrap;
            gap: 24px 40px;
            justify-content: center;
            margin-top: 28px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
        }
        .cta-contact i {
            color: var(--accent);
            margin-right: 6px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1a2a1a;
            color: rgba(255, 255, 255, 0.70);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 24px;
        }
        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .footer-logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.60);
            max-width: 320px;
        }
        .footer-col h6 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.60);
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.60);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            .about-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .about-image img {
                height: 300px;
            }
            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .post-card .post-thumb {
                width: 160px;
                min-height: 140px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
                --gap: 16px;
            }
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav {
                display: block;
            }
            .hero {
                min-height: 70vh;
                padding: 100px var(--gap) 60px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 20px 32px;
                margin-top: 32px;
                padding-top: 24px;
            }
            .hero-stats .stat-number {
                font-size: 1.5rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .about-features {
                grid-template-columns: 1fr;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid .stat-card .stat-number {
                font-size: 2rem;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .post-card {
                flex-direction: column;
            }
            .post-card .post-thumb {
                width: 100%;
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .site-logo {
                font-size: 1.1rem;
            }
            .site-logo i {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                padding: 14px 28px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
            .hero-stats .stat-number {
                font-size: 1.3rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stats-grid .stat-card .stat-number {
                font-size: 1.6rem;
            }
            .stats-grid .stat-card .stat-icon {
                font-size: 1.6rem;
            }
            .post-card .post-thumb {
                height: 140px;
            }
            .post-card .post-info {
                padding: 16px 18px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                font-size: 0.88rem;
            }
            .cta-content .cta-btn {
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                gap: 20px;
            }
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            z-index: 500;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: opacity var(--transition), transform var(--transition), visibility var(--transition), background var(--transition);
            cursor: pointer;
            border: none;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-3px);
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a6b3c;
            --primary-light: #2a8b5c;
            --primary-dark: #0f4d2a;
            --primary-bg: #eaf7f0;
            --accent: #f5a623;
            --accent-light: #f8c76a;
            --accent-dark: #d48f1a;
            --bg: #f9fafb;
            --bg-card: #ffffff;
            --bg-dark: #1a2e1f;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f8fafc;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-full: 50px;
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
        button { cursor: pointer; }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 玻璃沉浸导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255,255,255,0.72);
            backdrop-filter: blur(18px) saturate(180%);
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            border-bottom: 1px solid rgba(255,255,255,0.3);
            box-shadow: 0 1px 12px rgba(0,0,0,0.06);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255,255,255,0.94);
            box-shadow: 0 4px 24px rgba(0,0,0,0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
        }
        .logo i { font-size: 1.7rem; color: var(--accent); }
        .logo span { background: linear-gradient(135deg, var(--primary-dark), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a i { font-size: 0.9rem; opacity: 0.7; }
        .nav-links a:hover { background: var(--primary-bg); color: var(--primary); }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26,107,60,0.25);
        }
        .nav-links a.active i { opacity: 1; }
        .nav-links a.nav-cta {
            background: var(--accent);
            color: #1e293b;
            font-weight: 600;
            padding: 8px 22px;
            box-shadow: 0 4px 14px rgba(245,166,35,0.3);
        }
        .nav-links a.nav-cta:hover { background: var(--accent-dark); color: #fff; transform: translateY(-1px); }
        .nav-toggle { display: none; background: none; font-size: 1.5rem; color: var(--text); padding: 4px; }

        /* ===== 文章页 Banner ===== */
        .article-banner {
            padding-top: var(--nav-height);
            min-height: 360px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 60%, #3a9d6e 100%);
            background-size: cover;
            background-position: center;
            position: relative;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-banner .container { position: relative; z-index: 2; padding: 60px 24px 50px; }
        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
        }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-banner .breadcrumb a:hover { color: #fff; }
        .article-banner .breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.5); }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 800px;
            margin-bottom: 18px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .article-meta-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.85);
        }
        .article-meta-bar .tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 4px 14px;
            background: rgba(255,255,255,0.18);
            backdrop-filter: blur(4px);
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 500;
        }
        .article-meta-bar .tag i { font-size: 0.75rem; }
        .article-meta-bar .meta-item { display: flex; align-items: center; gap: 6px; }
        .article-meta-bar .meta-item i { opacity: 0.7; }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 50px 0 70px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 40px;
            border: 1px solid var(--border);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--primary-dark);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-bg);
        }
        .article-body .content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 18px;
        }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 24px auto;
            box-shadow: var(--shadow);
        }
        .article-body .content ul, .article-body .content ol {
            margin: 16px 0 20px 24px;
        }
        .article-body .content li {
            margin-bottom: 8px;
            list-style: disc;
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-bg);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body .content a { color: var(--primary); text-decoration: underline; }
        .article-body .content a:hover { color: var(--accent-dark); }
        .article-footer-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-footer-nav .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--primary-bg);
            color: var(--primary);
            border-radius: var(--radius-full);
            font-weight: 500;
            transition: var(--transition);
        }
        .article-footer-nav .btn-back:hover { background: var(--primary); color: #fff; transform: translateX(-4px); }
        .article-footer-nav .share-links {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .article-footer-nav .share-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--border-light);
            color: var(--text-light);
            transition: var(--transition);
        }
        .article-footer-nav .share-links a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 28px 24px;
        }
        .sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h4 i { color: var(--accent); }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { padding-left: 8px; }
        .sidebar-list .thumb {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            object-fit: cover;
            flex-shrink: 0;
        }
        .sidebar-list .info { flex: 1; min-width: 0; }
        .sidebar-list .info .title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .sidebar-list .info .date {
            font-size: 0.78rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            padding: 5px 14px;
            background: var(--primary-bg);
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 500;
            transition: var(--transition);
        }
        .sidebar-tags a:hover { background: var(--primary); color: #fff; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            color: #fff;
            padding: 32px 24px;
            text-align: center;
            border-radius: var(--radius);
            border: none;
        }
        .sidebar-cta h4 { color: #fff; justify-content: center; }
        .sidebar-cta p { font-size: 0.9rem; opacity: 0.9; margin-bottom: 20px; }
        .sidebar-cta .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            background: var(--accent);
            color: #1e293b;
            border-radius: var(--radius-full);
            font-weight: 600;
            transition: var(--transition);
        }
        .sidebar-cta .btn-cta:hover { background: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

        /* ===== 相关文章 ===== */
        .related-section {
            background: var(--bg);
            padding: 60px 0;
            border-top: 1px solid var(--border);
        }
        .related-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section .section-title i { color: var(--accent); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card .card-img {
            height: 180px;
            background: var(--primary-bg);
            overflow: hidden;
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-body { padding: 18px 20px 22px; }
        .related-card .card-body h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-body h3 a { color: var(--text); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body .meta { font-size: 0.8rem; color: var(--text-light); display: flex; gap: 14px; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.75; max-width: 320px; }
        .footer-col h6 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.65);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 6px; }
        .footer-col a i { width: 20px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.82rem;
            color: rgba(255,255,255,0.5);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.6);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: #1e293b; }

        /* ===== 404 状态 ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; opacity: 0.5; }
        .not-found-box h2 { font-size: 1.8rem; color: var(--text); margin-bottom: 12px; }
        .not-found-box p { color: var(--text-light); margin-bottom: 28px; }
        .not-found-box .btn-back { display: inline-flex; align-items: center; gap: 8px; padding: 12px 32px; background: var(--primary); color: #fff; border-radius: var(--radius-full); font-weight: 500; }
        .not-found-box .btn-back:hover { background: var(--primary-dark); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(18px); flex-direction: column; padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); border-radius: 0 0 var(--radius) var(--radius); }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
            .nav-links a.nav-cta { text-align: center; }
            .nav-toggle { display: block; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-body { padding: 24px 18px; }
            .article-meta-bar { gap: 12px; font-size: 0.82rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.35rem; }
            .article-banner .container { padding: 40px 16px 36px; }
            .article-body .content { font-size: 0.98rem; }
            .article-footer-nav { flex-direction: column; align-items: flex-start; }
            .sidebar-card { padding: 20px 16px; }
            .related-card .card-img { height: 140px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a6b3c;
            --primary-light: #2d8a4e;
            --primary-dark: #0f4d2a;
            --secondary: #e8b84b;
            --secondary-light: #f0d08a;
            --accent: #d4832b;
            --bg-body: #f7f5f0;
            --bg-card: #ffffff;
            --bg-dark: #1a2e1f;
            --bg-soft: #eff3ed;
            --text-primary: #1f2a1e;
            --text-body: #3d4a3c;
            --text-muted: #7a8a79;
            --text-light: #b8c4b7;
            --text-white: #f9fbf8;
            --border: #e2e8e0;
            --border-light: #eef3ec;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 107, 60, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 107, 60, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 107, 60, 0.14);
            --shadow-xl: 0 24px 64px rgba(26, 107, 60, 0.18);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --header-h: 72px;
            --max-width: 1200px;
            --gap: 28px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-light);
        }

        a:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        button:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.2vw, 1.6rem);
        }
        h4 {
            font-size: 1.15rem;
        }
        h5 {
            font-size: 1rem;
        }
        h6 {
            font-size: 0.92rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Glass Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.30);
            box-shadow: 0 1px 20px rgba(26, 107, 60, 0.06);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.94);
            box-shadow: 0 4px 32px rgba(26, 107, 60, 0.10);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .site-logo i {
            font-size: 1.6rem;
            color: var(--primary);
            transition: transform var(--transition);
        }

        .site-logo:hover i {
            transform: scale(1.10) rotate(-6deg);
        }

        .site-logo span {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-body);
            background: transparent;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition);
            position: relative;
        }

        .nav-links a i {
            font-size: 0.85rem;
            opacity: 0.7;
        }

        .nav-links a:hover {
            background: rgba(26, 107, 60, 0.07);
            color: var(--primary-dark);
        }

        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 107, 60, 0.25);
        }

        .nav-links a.active i {
            opacity: 1;
        }

        .nav-links a.active:hover {
            background: var(--primary-light);
            color: #fff;
        }

        .nav-links .nav-cta {
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 8px 22px;
            box-shadow: 0 2px 12px rgba(232, 184, 75, 0.30);
        }

        .nav-links .nav-cta:hover {
            background: var(--secondary-light);
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(232, 184, 75, 0.40);
            transform: translateY(-1px);
        }

        .nav-links .nav-cta i {
            opacity: 1;
            color: var(--primary-dark);
        }

        /* Mobile hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px 4px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .hamburger span {
            display: block;
            width: 28px;
            height: 3px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }

            .nav-links {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.35s ease;
                pointer-events: none;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-links a {
                width: 100%;
                justify-content: center;
                padding: 12px 18px;
                font-size: 1rem;
            }

            .nav-links .nav-cta {
                margin-top: 6px;
            }
        }

        /* ===== Banner / Hero (分类页) ===== */
        .category-banner {
            margin-top: var(--header-h);
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(26, 107, 60, 0.85), rgba(15, 77, 42, 0.92)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 60px 24px 50px;
            overflow: hidden;
        }

        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(232, 184, 75, 0.15), transparent 60%);
            pointer-events: none;
        }

        .category-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .category-banner .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(6px);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.15);
            margin-bottom: 18px;
        }

        .category-banner .banner-tag i {
            font-size: 0.75rem;
            opacity: 0.8;
        }

        .category-banner h1 {
            color: #fff;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }

        .category-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.88);
            max-width: 640px;
            margin: 0 auto 8px;
            line-height: 1.7;
        }

        .banner-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .banner-stats .stat-item {
            text-align: center;
            color: rgba(255, 255, 255, 0.90);
        }

        .banner-stats .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            display: block;
            line-height: 1.2;
        }

        .banner-stats .stat-item .label {
            font-size: 0.85rem;
            opacity: 0.8;
        }

        @media (max-width: 640px) {
            .category-banner {
                min-height: 260px;
                padding: 40px 16px 36px;
            }
            .category-banner h1 {
                font-size: 1.8rem;
            }
            .category-banner p {
                font-size: 1rem;
            }
            .banner-stats {
                gap: 24px;
            }
            .banner-stats .stat-item .num {
                font-size: 1.5rem;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            padding: 16px 0 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .breadcrumb-wrap .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-wrap a {
            color: var(--text-muted);
        }

        .breadcrumb-wrap a:hover {
            color: var(--primary);
        }

        .breadcrumb-wrap .sep {
            color: var(--text-light);
            font-size: 0.75rem;
        }

        .breadcrumb-wrap .current {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 70px 0;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 44px;
        }

        .section-header h2 {
            margin-bottom: 12px;
        }

        .section-header .sub {
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        .section-header .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-soft);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        @media (max-width: 640px) {
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Category Cards Grid ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }

        .cat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }

        .cat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .cat-card .card-img {
            height: 180px;
            background: var(--bg-soft) center center / cover no-repeat;
            position: relative;
            display: flex;
            align-items: flex-end;
            padding: 16px;
        }

        .cat-card .card-img .cat-badge {
            background: var(--secondary);
            color: var(--primary-dark);
            font-size: 0.72rem;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: 20px;
            display: inline-block;
            letter-spacing: 0.03em;
        }

        .cat-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .cat-card .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }

        .cat-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex: 1;
        }

        .cat-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }

        .cat-card .card-body .card-meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }

        .cat-card .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary);
            font-size: 0.9rem;
            margin-top: 12px;
            transition: gap var(--transition);
        }

        .cat-card .card-body .card-link:hover {
            gap: 12px;
            color: var(--primary-light);
        }

        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
            .cat-card .card-img {
                height: 150px;
            }
        }

        /* ===== Guide List / Content List ===== */
        .guide-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--gap);
        }

        .guide-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            padding: 20px 22px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            align-items: flex-start;
        }

        .guide-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .guide-item .gi-thumb {
            width: 90px;
            height: 90px;
            border-radius: var(--radius-sm);
            background: var(--bg-soft) center center / cover no-repeat;
            flex-shrink: 0;
        }

        .guide-item .gi-content {
            flex: 1;
        }

        .guide-item .gi-content .gi-tag {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--bg-soft);
            padding: 2px 10px;
            border-radius: 12px;
            display: inline-block;
            margin-bottom: 6px;
        }

        .guide-item .gi-content h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }

        .guide-item .gi-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .guide-item .gi-content .gi-meta {
            font-size: 0.78rem;
            color: var(--text-light);
            display: flex;
            gap: 14px;
            align-items: center;
        }

        .guide-item .gi-content .gi-meta i {
            margin-right: 3px;
        }

        @media (max-width: 768px) {
            .guide-list {
                grid-template-columns: 1fr;
            }
            .guide-item {
                padding: 16px;
            }
            .guide-item .gi-thumb {
                width: 70px;
                height: 70px;
            }
        }

        /* ===== Process / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 22px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--border);
            line-height: 1;
            transition: color var(--transition);
        }

        .step-card:hover::before {
            color: var(--primary-light);
            opacity: 0.4;
        }

        .step-card .step-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 14px;
            display: inline-block;
        }

        .step-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-card {
                padding: 24px 18px 22px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: var(--bg-soft);
        }

        .faq-question .faq-icon {
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 640px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.88rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 70px 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(232, 184, 75, 0.12), transparent 60%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            padding: 14px 36px;
            border-radius: 60px;
            box-shadow: 0 6px 28px rgba(232, 184, 75, 0.30);
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
        }

        .cta-section .btn-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 10px 40px rgba(232, 184, 75, 0.40);
            background: var(--secondary-light);
        }

        .cta-section .btn-cta i {
            font-size: 1rem;
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 48px 16px;
            }
            .cta-section .btn-cta {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .site-footer .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand .footer-logo i {
            color: var(--secondary);
        }

        .site-footer .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .site-footer .footer-col h6 {
            color: rgba(255, 255, 255, 0.9);
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }

        .site-footer .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }

        .site-footer .footer-col a i {
            width: 20px;
            margin-right: 6px;
            color: var(--secondary);
        }

        .site-footer .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0 24px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        .site-footer .footer-social {
            display: flex;
            gap: 12px;
        }

        .site-footer .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.5);
            font-size: 1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .site-footer .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary-dark);
            transform: scale(1.08);
        }

        @media (max-width: 900px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 600px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 60px;
            font-weight: 600;
            font-size: 0.92rem;
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 107, 60, 0.20);
        }

        .btn-primary-solid {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 0.95rem;
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 20px rgba(26, 107, 60, 0.20);
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
        }

        .btn-primary-solid:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(26, 107, 60, 0.30);
            color: #fff;
        }

        /* ===== Responsive tweaks ===== */
        @media (max-width: 1024px) {
            :root {
                --gap: 22px;
            }
        }

        @media (max-width: 480px) {
            .nav-links a {
                font-size: 0.88rem;
                padding: 6px 14px;
            }
            .cat-card .card-body {
                padding: 16px 18px 20px;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(26, 107, 60, 0.25);
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.3s ease, transform 0.3s ease, background var(--transition);
            z-index: 999;
            border: none;
            cursor: pointer;
        }

        .back-top.show {
            opacity: 1;
            transform: translateY(0);
        }

        .back-top:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(26, 107, 60, 0.35);
        }

        @media (max-width: 520px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }