/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1B3A34;
            --primary-dark: #14302A;
            --primary-light: #2A5A4E;
            --accent: #FF6B35;
            --accent-hover: #E55A2B;
            --bg-white: #FFFFFF;
            --bg-light: #F5F5F5;
            --bg-dark: #1B3A34;
            --text-dark: #222222;
            --text-medium: #555555;
            --text-light: #888888;
            --text-white: #FFFFFF;
            --border-light: #E8E8E8;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.14);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --transition: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-dark);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 20px; width: 100%; }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--text-dark); font-weight: 600; }
        h1 { font-size: 3rem; font-weight: 700; }      /* 48px */
        h2 { font-size: 2.25rem; font-weight: 600; }   /* 36px */
        h3 { font-size: 1.5rem; font-weight: 500; }    /* 24px */
        h4 { font-size: 1.125rem; font-weight: 600; }  /* 18px */
        p { margin-bottom: 1rem; color: var(--text-medium); }
        .text-small { font-size: 0.875rem; color: var(--text-light); }

        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.25rem; }
            h4 { font-size: 1rem; }
            body { font-size: 14px; }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255,255,255,0.98);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .logo i { color: var(--accent); font-size: 1.6rem; }
        .logo:hover { color: var(--primary); }
        .main-nav { display: flex; align-items: center; gap: 8px; }
        .main-nav a {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-medium);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .main-nav a:hover { color: var(--primary); background: rgba(27,58,52,0.06); }
        .main-nav a.active { color: var(--primary); background: rgba(27,58,52,0.08); font-weight: 600; }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }
        .hamburger:hover { background: rgba(27,58,52,0.06); }

        /* Mobile Nav Overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--header-height));
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(12px);
            z-index: 999;
            padding: 24px 20px;
            flex-direction: column;
            gap: 12px;
        }
        .mobile-nav-overlay.open { display: flex; }
        .mobile-nav-overlay a {
            padding: 14px 20px;
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-dark);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }
        .mobile-nav-overlay a:hover { background: rgba(27,58,52,0.06); color: var(--primary); }
        .mobile-nav-overlay a.active { background: rgba(27,58,52,0.08); color: var(--primary); font-weight: 600; }

        @media (max-width: 768px) {
            .main-nav { display: none; }
            .hamburger { display: block; }
            .logo { font-size: 1.15rem; }
        }

        /* ===== Hero Section ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 100px 20px 80px;
            margin-top: 0;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27,58,52,0.85) 0%, rgba(27,58,52,0.40) 50%, rgba(0,0,0,0.30) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            width: 100%;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero .subtitle {
            font-size: 1.25rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 36px;
            line-height: 1.6;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            text-shadow: 0 1px 8px rgba(0,0,0,0.2);
        }
        .hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .btn-primary, .btn-outline, .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(255,107,53,0.30);
        }
        .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255,107,53,0.40); color: #fff; }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.70);
        }
        .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); color: #fff; }
        .btn-accent {
            background: var(--accent);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(255,107,53,0.25);
        }
        .btn-accent:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255,107,53,0.35); color: #fff; }

        @media (max-width: 768px) {
            .hero { min-height: 88vh; padding: 80px 20px 60px; }
            .hero h1 { font-size: 2rem; }
            .hero .subtitle { font-size: 1rem; }
            .btn-primary, .btn-outline { padding: 12px 24px; font-size: 0.9rem; }
        }
        @media (max-width: 520px) {
            .hero-buttons { flex-direction: column; align-items: center; }
            .hero h1 { font-size: 1.7rem; }
        }

        /* ===== Section Common ===== */
        .section { padding: 5rem 0; }
        .section-alt { background: var(--bg-light); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            font-size: 2.25rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-dark .section-title h2 { color: var(--text-white); }
        .section-dark .section-title p { color: rgba(255,255,255,0.65); }

        @media (max-width: 768px) {
            .section { padding: 3rem 0; }
            .section-title h2 { font-size: 1.5rem; }
            .section-title p { font-size: 0.9rem; }
        }

        /* ===== Pain Points ===== */
        .pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .pain-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .pain-card .icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(27,58,52,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--accent);
            transition: all var(--transition);
        }
        .pain-card:hover .icon { background: var(--primary); color: #fff; }
        .pain-card h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; color: var(--text-dark); }
        .pain-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0; }

        @media (max-width: 992px) { .pain-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .pain-grid { grid-template-columns: 1fr; } }

        /* ===== Solutions ===== */
        .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .solution-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .solution-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
        .solution-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .solution-card .card-body { padding: 1.5rem; }
        .solution-card .card-body h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; color: var(--text-dark); }
        .solution-card .card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 16px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .solution-card .card-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .solution-card .card-link:hover { color: var(--accent); gap: 10px; }

        @media (max-width: 992px) { .solution-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .solution-grid { grid-template-columns: 1fr; } }

        /* ===== Stats ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-item { text-align: center; padding: 1.5rem; }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-number .unit { font-size: 1.4rem; font-weight: 500; color: var(--text-light); }
        .stat-label { font-size: 1rem; color: var(--text-medium); font-weight: 500; }
        .stat-desc { font-size: 0.85rem; color: var(--text-light); margin-top: 4px; }

        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-number { font-size: 2.2rem; }
        }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

        /* ===== News / CMS List ===== */
        .cms-news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .news-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: var(--bg-light);
        }
        .news-card .card-body { padding: 1.25rem 1.5rem 1.5rem; }
        .news-card .news-category {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-white);
            background: var(--primary);
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .news-card .news-category.accent { background: var(--accent); }
        .news-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; color: var(--text-dark); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .news-summary { font-size: 0.875rem; color: var(--text-light); margin-bottom: 12px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .news-meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; color: var(--text-light); }
        .news-card .news-date { display: flex; align-items: center; gap: 4px; }
        .news-empty { text-align: center; padding: 3rem 1rem; color: var(--text-light); font-size: 1rem; grid-column: 1 / -1; }

        @media (max-width: 992px) { .cms-news-list { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .cms-news-list { grid-template-columns: 1fr; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 760px; margin: 0 auto; }
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: var(--bg-white);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: rgba(27,58,52,0.20); }
        .faq-question {
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(27,58,52,0.03); }
        .faq-question .icon { font-size: 1.2rem; color: var(--accent); transition: transform var(--transition); }
        .faq-item.active .faq-question .icon { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 22px;
            color: var(--text-medium);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            text-align: center;
            padding: 5rem 0;
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .cta-section h2 { color: var(--text-white); font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.70); font-size: 1.05rem; margin-bottom: 28px; max-width: 520px; margin-left: auto; margin-right: auto; }
        .cta-section .btn-primary { font-size: 1.05rem; padding: 16px 40px; }

        @media (max-width: 768px) {
            .cta-section { padding: 3rem 0; }
            .cta-section h2 { font-size: 1.5rem; }
        }

        /* ===== Modal / Form ===== */
        .modal-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.55);
            backdrop-filter: blur(4px);
            z-index: 2000;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        .modal-overlay.open { display: flex; }
        .modal-box {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2.8rem;
            max-width: 500px;
            width: 100%;
            box-shadow: var(--shadow-lg);
            position: relative;
            animation: modalIn 0.3s ease;
        }
        @keyframes modalIn { from { opacity:0; transform: translateY(20px); } to { opacity:1; transform: translateY(0); } }
        .modal-close {
            position: absolute;
            top: 16px;
            right: 20px;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-light);
            cursor: pointer;
            transition: color var(--transition);
            padding: 4px;
        }
        .modal-close:hover { color: var(--text-dark); }
        .modal-box h3 { font-size: 1.4rem; font-weight: 600; margin-bottom: 6px; color: var(--text-dark); }
        .modal-box .modal-desc { font-size: 0.9rem; color: var(--text-light); margin-bottom: 20px; }
        .form-group { margin-bottom: 16px; }
        .form-group label { display: block; font-size: 0.85rem; font-weight: 500; color: var(--text-dark); margin-bottom: 4px; }
        .form-group input, .form-group textarea {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            transition: border-color var(--transition), box-shadow var(--transition);
            background: var(--bg-white);
        }
        .form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(27,58,52,0.12); }
        .form-group textarea { min-height: 80px; resize: vertical; }
        .form-privacy { font-size: 0.75rem; color: var(--text-light); margin-top: 12px; text-align: center; }
        .form-submit { width: 100%; padding: 14px; font-size: 1rem; font-weight: 600; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.80);
            padding: 4rem 0 2rem;
        }
        .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 32px; }
        .footer-brand .logo { color: var(--text-white); margin-bottom: 12px; font-size: 1.2rem; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.55); line-height: 1.7; margin-bottom: 0; max-width: 260px; }
        .footer-col h4 { font-size: 0.95rem; font-weight: 600; color: var(--text-white); margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { font-size: 0.85rem; color: rgba(255,255,255,0.55); transition: all var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-contact li { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-bottom: 10px; }
        .footer-contact li i { color: var(--accent); width: 16px; text-align: center; }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.60);
            transition: all var(--transition);
            font-size: 0.95rem;
        }
        .footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            margin-top: 32px;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.35);
        }

        @media (max-width: 992px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; text-align: center; } .footer-brand p { margin: 0 auto; } .footer-social { justify-content: center; } .footer-contact li { justify-content: center; } }

        /* ===== Scroll Animation ===== */
        .fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }

        /* Foundation overrides */
        .grid-container { max-width: var(--container-max); padding-left: 20px; padding-right: 20px; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1B3A34;
            --primary-dark: #14302A;
            --primary-light: #2A5A4E;
            --accent: #FF6B35;
            --accent-hover: #E55A2B;
            --accent-light: #FF8C5A;
            --bg-white: #FFFFFF;
            --bg-light: #F5F5F5;
            --bg-dark: #1B3A34;
            --text-dark: #222222;
            --text-mid: #555555;
            --text-light: #888888;
            --text-white: #FFFFFF;
            --text-off-white: #DDDDDD;
            --border-color: #E8E8E8;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.15);
            --transition: 0.3s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --nav-height: 70px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-dark);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section-padding { padding: 5rem 0; }
        @media (max-width: 639px) { .section-padding { padding: 3rem 0; } .container { padding: 0 16px; } }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--text-dark); }
        h1 { font-size: 2.5rem; font-weight: 700; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }
        p { margin-bottom: 1rem; color: var(--text-mid); }
        .text-center { text-align: center; }
        .text-primary { color: var(--primary); }
        .text-accent { color: var(--accent); }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-header .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
        }
        .site-header .logo i { font-size: 1.5rem; color: var(--accent); }
        .site-header .logo:hover { color: var(--primary); }
        .main-nav { display: flex; align-items: center; gap: 2px; }
        .main-nav a {
            display: block;
            padding: 0.5rem 1.1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-mid);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .main-nav a:hover { color: var(--primary); background: var(--bg-light); }
        .main-nav a.active { color: var(--primary); font-weight: 600; }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 0.5rem 1.4rem !important;
            background: var(--accent) !important;
            color: var(--text-white) !important;
            border-radius: var(--radius-md) !important;
            font-weight: 600 !important;
            margin-left: 0.5rem;
            transition: all var(--transition);
        }
        .nav-cta:hover { background: var(--accent-hover) !important; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
        .nav-cta::after { display: none !important; }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--nav-height));
            background: var(--bg-white);
            z-index: 999;
            padding: 2rem 1.5rem;
            overflow-y: auto;
            flex-direction: column;
            gap: 0.5rem;
            border-top: 1px solid var(--border-color);
        }
        .mobile-nav-overlay.open { display: flex; }
        .mobile-nav-overlay a {
            display: block;
            padding: 0.9rem 1rem;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-dark);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }
        .mobile-nav-overlay a:hover { background: var(--bg-light); color: var(--primary); }
        .mobile-nav-overlay a.active { background: var(--bg-light); color: var(--primary); font-weight: 600; border-left: 4px solid var(--accent); }

        @media (max-width: 1023px) {
            .main-nav { display: none; }
            .hamburger { display: flex; }
        }
        @media (min-width: 1024px) {
            .hamburger { display: none !important; }
            .mobile-nav-overlay { display: none !important; }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-area {
            padding-top: calc(var(--nav-height) + 1.5rem);
            padding-bottom: 0.5rem;
            background: var(--bg-light);
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem 0.6rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb a { color: var(--primary); font-weight: 500; }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: #bbb; font-size: 0.75rem; }
        .breadcrumb .current { color: var(--text-mid); font-weight: 400; }

        /* ===== 文章头部 ===== */
        .article-header {
            padding: 2.5rem 0 1.5rem;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
        }
        .article-header h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-dark);
            max-width: 860px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem 2rem;
            margin-top: 1.2rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
        .article-meta .meta-item i { font-size: 0.85rem; color: var(--accent); }
        .article-meta .category-tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            background: var(--primary);
            color: var(--text-white);
            font-size: 0.8rem;
            border-radius: 20px;
            font-weight: 500;
        }

        /* ===== 正文区 ===== */
        .article-body-wrap {
            padding: 3rem 0 4rem;
            background: var(--bg-white);
        }
        .article-body {
            max-width: 780px;
            margin: 0 auto;
        }
        .cms-article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-dark);
        }
        .cms-article-content p {
            margin-bottom: 1.4rem;
            text-indent: 2em;
            color: var(--text-dark);
        }
        .cms-article-content h2 {
            font-size: 1.6rem;
            font-weight: 600;
            margin: 2.2rem 0 1rem;
            color: var(--primary);
            border-left: 4px solid var(--accent);
            padding-left: 1rem;
        }
        .cms-article-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin: 1.8rem 0 0.8rem;
            color: var(--primary-light);
        }
        .cms-article-content img {
            margin: 1.5rem auto;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            max-width: 100%;
        }
        .cms-article-content blockquote {
            margin: 1.5rem 0;
            padding: 1rem 1.5rem;
            border-left: 4px solid var(--accent);
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: normal;
            color: var(--text-mid);
        }
        .cms-article-content ul, .cms-article-content ol {
            margin: 1rem 0 1.4rem 1.5rem;
            color: var(--text-dark);
        }
        .cms-article-content li { margin-bottom: 0.4rem; list-style: disc; }
        .cms-article-content a { color: var(--accent); text-decoration: underline; font-weight: 500; }
        .cms-article-content a:hover { color: var(--accent-hover); }

        /* 文章未找到 */
        .article-not-found {
            text-align: center;
            padding: 4rem 2rem;
        }
        .article-not-found i { font-size: 3.5rem; color: var(--text-light); margin-bottom: 1.5rem; }
        .article-not-found h2 { font-size: 1.8rem; color: var(--text-dark); margin-bottom: 0.8rem; }
        .article-not-found p { color: var(--text-mid); margin-bottom: 1.5rem; }
        .article-not-found .btn { display: inline-block; padding: 0.7rem 2rem; }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 3.5rem 0;
            background: var(--bg-light);
        }
        .related-section h2 {
            font-size: 1.6rem;
            font-weight: 600;
            margin-bottom: 2rem;
            color: var(--primary);
            position: relative;
            display: inline-block;
        }
        .related-section h2::after {
            content: '';
            display: block;
            width: 40px;
            height: 3px;
            background: var(--accent);
            margin-top: 6px;
            border-radius: 2px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: var(--bg-light);
        }
        .related-card .card-body {
            padding: 1.2rem 1.3rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0.8rem;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .related-card .card-meta .tag {
            padding: 0.15rem 0.6rem;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 12px;
            font-size: 0.75rem;
        }

        @media (max-width: 1023px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 639px) {
            .related-grid { grid-template-columns: 1fr; }
            .article-header h1 { font-size: 1.5rem; }
            .article-body { padding: 0; }
            .cms-article-content { font-size: 0.95rem; }
            .cms-article-content p { text-indent: 1.5em; }
        }

        /* ===== 返回按钮 ===== */
        .back-action {
            text-align: center;
            margin-top: 2.5rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border-color);
        }
        .back-action .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 0.7rem 2rem;
            background: var(--bg-white);
            color: var(--primary);
            border: 2px solid var(--primary);
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
        }
        .back-action .btn:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-off-white);
            padding: 3.5rem 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .site-footer .footer-brand .logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 1rem;
        }
        .site-footer .footer-brand .logo i { color: var(--accent); }
        .site-footer .footer-brand .logo:hover { color: var(--text-white); }
        .site-footer .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.7); line-height: 1.7; margin-bottom: 1.2rem; }
        .footer-social { display: flex; gap: 0.8rem; }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.1);
            color: var(--text-off-white);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: var(--text-white); transform: translateY(-2px); }
        .site-footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 1rem;
        }
        .site-footer .footer-col ul li { margin-bottom: 0.5rem; }
        .site-footer .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            transition: all var(--transition);
        }
        .site-footer .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
        }
        .footer-contact li i { width: 18px; color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }

        @media (max-width: 1023px) {
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 639px) {
            .site-footer .footer-grid { grid-template-columns: 1fr; }
            .site-footer { padding: 2.5rem 0 0; }
        }

        /* ===== 通用按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 0.75rem 2rem;
            background: var(--accent);
            color: var(--text-white);
            border: none;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: var(--shadow-md); color: var(--text-white); }

        /* ===== FAQ折叠 ===== */
        .faq-item { border-bottom: 1px solid var(--border-color); padding: 1rem 0; }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            padding: 0.25rem 0;
            user-select: none;
        }
        .faq-question i { transition: transform var(--transition); color: var(--accent); font-size: 1.1rem; }
        .faq-question.open i { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-mid);
            line-height: 1.7;
        }
        .faq-answer.open { max-height: 300px; padding-top: 0.8rem; }

        /* ===== 表单弹层 ===== */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 2000;
            justify-content: center;
            align-items: center;
            backdrop-filter: blur(4px);
        }
        .modal-overlay.open { display: flex; }
        .modal-box {
            background: var(--bg-white);
            border-radius: var(--radius-xl);
            padding: 2.5rem 2rem 2rem;
            max-width: 500px;
            width: 90%;
            position: relative;
            box-shadow: var(--shadow-lg);
        }
        .modal-box .close-modal {
            position: absolute;
            top: 14px;
            right: 18px;
            font-size: 1.4rem;
            color: var(--text-light);
            cursor: pointer;
            transition: color var(--transition);
            background: none;
            border: none;
        }
        .modal-box .close-modal:hover { color: var(--accent); }
        .modal-box h3 { font-size: 1.4rem; margin-bottom: 0.5rem; color: var(--primary); }
        .modal-box p { font-size: 0.9rem; color: var(--text-mid); margin-bottom: 1.5rem; }
        .modal-box label { display: block; font-size: 0.9rem; font-weight: 500; margin-bottom: 0.3rem; color: var(--text-dark); }
        .modal-box input, .modal-box textarea {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1.5px solid var(--border-color);
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-family: var(--font-sans);
            transition: border var(--transition);
            margin-bottom: 1rem;
        }
        .modal-box input:focus, .modal-box textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(27,58,52,0.1); }
        .modal-box textarea { min-height: 90px; resize: vertical; }
        .modal-box .privacy-note { font-size: 0.8rem; color: var(--text-light); margin-top: 0.5rem; text-align: center; }
        .modal-box .btn-primary { width: 100%; justify-content: center; margin-top: 0.5rem; }

        /* ===== 滚动动画 ===== */
        .fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

        /* ===== 图片占位 ===== */
        .img-placeholder {
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 0.9rem;
            border-radius: var(--radius-md);
        }

/* roulang page: category1 */
:root {
            --primary: #1B3A34;
            --primary-dark: #14302A;
            --primary-light: #2A5A50;
            --accent: #FF6B35;
            --accent-hover: #E55A2B;
            --bg-white: #FFFFFF;
            --bg-light: #F5F5F5;
            --bg-dark: #1B3A34;
            --text-dark: #222222;
            --text-medium: #555555;
            --text-light: #888888;
            --text-white: #FFFFFF;
            --border-light: #E8E8E8;
            --radius: 8px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.15);
            --transition: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
            --max-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--bg-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea {
            font-family: var(--font-family);
            font-size: 1rem;
        }

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

        @media (max-width: 639px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Navigation ===== */
        .main-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 40px;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .main-nav .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: 0.5px;
        }
        .main-nav .logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            display: inline-block;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-medium);
            border-radius: var(--radius);
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
            position: relative;
        }
        .nav-links li a:hover,
        .nav-links li a:focus {
            color: var(--primary);
            background: rgba(27, 58, 52, 0.06);
            outline: none;
        }
        .nav-links li a.active {
            color: var(--primary);
            background: rgba(27, 58, 52, 0.08);
            font-weight: 600;
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 18px;
            right: 18px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px 2px 0 0;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            background: var(--primary);
            color: var(--text-white) !important;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.95rem;
            transition: background var(--transition), transform var(--transition);
            text-decoration: none;
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            transform: scale(1.02);
            color: var(--text-white) !important;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 28px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .hamburger.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }

        /* Mobile nav overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
        }
        .mobile-nav-overlay.open {
            display: block;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            height: 100vh;
            background: var(--bg-white);
            z-index: 999;
            padding: 100px 30px 40px;
            box-shadow: -4px 0 20px rgba(0, 0, 0, 0.10);
            transition: right 0.35s ease;
            overflow-y: auto;
        }
        .mobile-nav.open {
            right: 0;
        }
        .mobile-nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .mobile-nav ul li a {
            display: block;
            padding: 14px 0;
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-dark);
            border-bottom: 1px solid var(--border-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        .mobile-nav ul li a:hover,
        .mobile-nav ul li a.active {
            color: var(--primary);
        }
        .mobile-nav .nav-cta {
            margin-top: 30px;
            text-align: center;
            display: block;
        }

        @media (max-width: 1023px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav {
                display: block;
            }
            .main-nav {
                padding: 0 20px;
            }
        }

        @media (min-width: 1024px) {
            .mobile-nav,
            .mobile-nav-overlay {
                display: none !important;
            }
            .hamburger {
                display: none;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.webp') center center/cover no-repeat;
            margin-top: 70px;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27, 58, 52, 0.85) 0%, rgba(0, 0, 0, 0.60) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            padding: 40px 24px;
            animation: fadeInUp 0.8s ease forwards;
        }
        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .hero-content h1 span {
            color: var(--accent);
        }
        .hero-content .subtitle {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: var(--accent);
            color: var(--text-white);
            border: none;
            border-radius: var(--radius);
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            text-decoration: none;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--accent-hover);
            transform: scale(1.02);
            box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
            color: var(--text-white);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.7);
            border-radius: var(--radius);
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            text-decoration: none;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--text-white);
            transform: scale(1.02);
            color: var(--text-white);
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @media (max-width: 767px) {
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .hero-content .subtitle {
                font-size: 1.05rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 5rem 0;
        }
        .section-alt {
            background: var(--bg-light);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-title h2 {
            font-size: 2.25rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-title p {
            font-size: 1.1rem;
            color: var(--text-medium);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-dark .section-title h2 {
            color: var(--text-white);
        }
        .section-dark .section-title p {
            color: rgba(255, 255, 255, 0.75);
        }

        @media (max-width: 767px) {
            .section {
                padding: 3rem 0;
            }
            .section-title h2 {
                font-size: 1.75rem;
            }
            .section-title p {
                font-size: 1rem;
            }
        }

        /* ===== Features / Cards ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-light);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            background: rgba(27, 58, 52, 0.08);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 18px;
            transition: background var(--transition), color var(--transition);
        }
        .feature-card:hover .icon {
            background: var(--primary);
            color: var(--text-white);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-medium);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== Scenario ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }
        .scenario-item {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .scenario-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .scenario-item .icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 14px;
        }
        .scenario-item h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .scenario-item p {
            font-size: 0.9rem;
            color: var(--text-medium);
            margin-bottom: 0;
        }

        /* ===== Process / Timeline ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            position: relative;
        }
        .process-step {
            text-align: center;
            padding: 1.5rem 1rem;
            position: relative;
        }
        .process-step .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            background: var(--primary);
            color: var(--text-white);
            font-size: 1.3rem;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(27, 58, 52, 0.25);
        }
        .process-step h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.9rem;
            color: var(--text-medium);
            margin-bottom: 0;
        }
        .section-dark .process-step h4 {
            color: var(--text-white);
        }
        .section-dark .process-step p {
            color: rgba(255, 255, 255, 0.75);
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: 5rem 0;
        }
        .cta-section h2 {
            font-size: 2.25rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-medium);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .section-dark .cta-section p {
            color: rgba(255, 255, 255, 0.75);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.5rem;
            cursor: pointer;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover,
        .faq-question:focus {
            background: rgba(27, 58, 52, 0.04);
            outline: none;
        }
        .faq-question .toggle-icon {
            font-size: 1.2rem;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question .toggle-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--text-medium);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 4rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 2rem;
        }
        .footer-brand .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-white);
            text-decoration: none;
            margin-bottom: 14px;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            margin-bottom: 18px;
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--text-white);
            transform: scale(1.1);
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 18px;
            color: var(--text-white);
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
        }
        .footer-contact li i {
            width: 20px;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 639px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        /* ===== Form Modal ===== */
        .modal-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 2000;
            align-items: center;
            justify-content: center;
            padding: 20px;
            backdrop-filter: blur(4px);
        }
        .modal-overlay.open {
            display: flex;
        }
        .modal-box {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            max-width: 520px;
            width: 100%;
            padding: 2.5rem 2rem;
            box-shadow: var(--shadow-lg);
            position: relative;
            animation: fadeInUp 0.4s ease forwards;
        }
        .modal-box .close-btn {
            position: absolute;
            top: 16px;
            right: 20px;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-light);
            cursor: pointer;
            transition: color var(--transition);
        }
        .modal-box .close-btn:hover {
            color: var(--text-dark);
        }
        .modal-box h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .modal-box .modal-sub {
            font-size: 0.95rem;
            color: var(--text-medium);
            margin-bottom: 24px;
        }
        .modal-box .form-group {
            margin-bottom: 18px;
        }
        .modal-box .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-dark);
            margin-bottom: 4px;
        }
        .modal-box .form-group input,
        .modal-box .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            font-size: 0.95rem;
            color: var(--text-dark);
            background: var(--bg-white);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .modal-box .form-group input:focus,
        .modal-box .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 58, 52, 0.12);
            outline: none;
        }
        .modal-box .form-group textarea {
            min-height: 80px;
            resize: vertical;
        }
        .modal-box .privacy-note {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 12px;
            line-height: 1.5;
        }
        .modal-box .btn-primary {
            width: 100%;
            justify-content: center;
            margin-top: 8px;
        }

        @media (max-width: 639px) {
            .modal-box {
                padding: 2rem 1.5rem;
            }
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: var(--text-white);
            border: none;
            border-radius: 50%;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: background var(--transition), transform var(--transition), opacity var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 500;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
        }

        @media (max-width: 639px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .gap-1 {
            gap: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 639px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 399px) {
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1B3A34;
            --primary-dark: #14302A;
            --primary-light: #2A5A50;
            --accent: #FF6B35;
            --accent-hover: #E85A2A;
            --bg-white: #FFFFFF;
            --bg-light: #F5F5F5;
            --bg-dark: #1B3A34;
            --text-dark: #222222;
            --text-mid: #555555;
            --text-light: #888888;
            --text-white: #FFFFFF;
            --border-light: #E8E8E8;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --transition: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body { font-family: var(--font-family); color: var(--text-dark); background: var(--bg-white); line-height: 1.6; -webkit-font-smoothing: antialiased; }

        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }

        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 20px; width: 100%; }

        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--text-dark); }
        h1 { font-size: 3rem; font-weight: 700; }
        h2 { font-size: 2.25rem; font-weight: 600; }
        h3 { font-size: 1.5rem; font-weight: 500; }
        h4 { font-size: 1.125rem; font-weight: 600; }
        p { color: var(--text-mid); line-height: 1.7; }

        .section-padding { padding: 5rem 0; }
        .section-title { text-align: center; margin-bottom: 3rem; }
        .section-title h2 { margin-bottom: 0.75rem; }
        .section-title p { max-width: 640px; margin: 0 auto; color: var(--text-light); font-size: 1.125rem; }

        .text-center { text-align: center; }
        .text-white { color: var(--text-white); }
        .text-white h1, .text-white h2, .text-white h3, .text-white h4, .text-white p { color: var(--text-white); }

        .btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.875rem 2rem; border-radius: var(--radius-md); font-weight: 600; font-size: 1rem; border: 2px solid transparent; cursor: pointer; transition: all var(--transition); text-align: center; line-height: 1.2; }
        .btn-primary { background: var(--primary); color: var(--text-white); border-color: var(--primary); }
        .btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: var(--text-white); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
        .btn-outline { background: transparent; color: var(--text-white); border-color: var(--text-white); }
        .btn-outline:hover { background: var(--text-white); color: var(--primary); border-color: var(--text-white); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-accent { background: var(--accent); color: var(--text-white); border-color: var(--accent); }
        .btn-accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--text-white); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-sm { padding: 0.6rem 1.25rem; font-size: 0.875rem; }

        .badge { display: inline-block; padding: 0.25rem 0.75rem; background: var(--accent); color: var(--text-white); border-radius: 20px; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em; }

        /* ===== Navigation ===== */
        .site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: var(--bg-white); border-bottom: 1px solid var(--border-light); height: 70px; transition: all var(--transition); }
        .site-header .container { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .site-header .logo { display: flex; align-items: center; gap: 0.5rem; font-size: 1.35rem; font-weight: 700; color: var(--primary); letter-spacing: -0.01em; }
        .site-header .logo i { font-size: 1.5rem; color: var(--accent); }
        .site-header .logo:hover { color: var(--primary); }
        .main-nav { display: flex; align-items: center; gap: 0.25rem; }
        .main-nav a { display: block; padding: 0.5rem 1rem; font-size: 0.95rem; font-weight: 500; color: var(--text-mid); border-radius: var(--radius-sm); transition: all var(--transition); position: relative; }
        .main-nav a:hover { color: var(--primary); background: var(--bg-light); }
        .main-nav a.active { color: var(--primary); background: rgba(27,58,52,0.08); font-weight: 600; }
        .main-nav a.active::after { content: ''; position: absolute; bottom: 2px; left: 1rem; right: 1rem; height: 2px; background: var(--accent); border-radius: 2px; }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text-dark); cursor: pointer; padding: 0.5rem; }

        /* Mobile Nav */
        .mobile-nav-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 999; }
        .mobile-nav-overlay.open { display: block; }
        .mobile-nav-panel { position: fixed; top: 0; right: -300px; width: 280px; height: 100%; background: var(--bg-white); z-index: 1001; padding: 2rem 1.5rem; transition: right 0.35s ease; box-shadow: var(--shadow-lg); overflow-y: auto; }
        .mobile-nav-panel.open { right: 0; }
        .mobile-nav-panel .close-btn { background: none; border: none; font-size: 1.5rem; color: var(--text-dark); cursor: pointer; float: right; padding: 0.25rem; }
        .mobile-nav-panel .mobile-nav-list { margin-top: 3rem; display: flex; flex-direction: column; gap: 0.5rem; }
        .mobile-nav-panel .mobile-nav-list a { display: block; padding: 0.75rem 1rem; font-size: 1.1rem; font-weight: 500; color: var(--text-dark); border-radius: var(--radius-sm); transition: background var(--transition); }
        .mobile-nav-panel .mobile-nav-list a:hover { background: var(--bg-light); }
        .mobile-nav-panel .mobile-nav-list a.active { color: var(--primary); background: rgba(27,58,52,0.08); font-weight: 600; }

        /* ===== Hero ===== */
        .hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat; margin-top: 70px; }
        .hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(27,58,52,0.85) 0%, rgba(27,58,52,0.45) 60%, rgba(0,0,0,0.3) 100%); }
        .hero .hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; padding: 2rem; }
        .hero .hero-content h1 { font-size: 3.5rem; font-weight: 700; color: var(--text-white); margin-bottom: 1rem; letter-spacing: -0.02em; }
        .hero .hero-content p { font-size: 1.25rem; color: rgba(255,255,255,0.85); margin-bottom: 2rem; max-width: 600px; margin-left: auto; margin-right: auto; }
        .hero .hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

        /* ===== Pain Points ===== */
        .pain-points { background: var(--bg-light); }
        .pain-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
        .pain-card { background: var(--bg-white); border-radius: var(--radius-lg); padding: 2rem 1.75rem; box-shadow: var(--shadow-sm); transition: all var(--transition); border: 1px solid var(--border-light); }
        .pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .pain-card .icon { width: 48px; height: 48px; background: rgba(27,58,52,0.08); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; font-size: 1.25rem; color: var(--primary); }
        .pain-card h4 { margin-bottom: 0.5rem; }
        .pain-card p { font-size: 0.95rem; color: var(--text-light); line-height: 1.6; }

        /* ===== Features ===== */
        .features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
        .feature-card { background: var(--bg-white); border-radius: var(--radius-lg); padding: 2rem 1.75rem; box-shadow: var(--shadow-sm); transition: all var(--transition); border: 1px solid var(--border-light); position: relative; overflow: hidden; }
        .feature-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--primary); opacity: 0; transition: opacity var(--transition); }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .feature-card:hover::before { opacity: 1; }
        .feature-card .icon { width: 52px; height: 52px; background: var(--primary); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; margin-bottom: 1.25rem; font-size: 1.35rem; color: var(--text-white); }
        .feature-card h4 { margin-bottom: 0.5rem; }
        .feature-card p { font-size: 0.95rem; color: var(--text-light); line-height: 1.6; }
        .feature-card .feature-link { display: inline-flex; align-items: center; gap: 0.35rem; margin-top: 1rem; font-weight: 500; color: var(--primary); font-size: 0.9rem; }
        .feature-card .feature-link:hover { color: var(--accent); }

        /* ===== Stats ===== */
        .stats-section { background: var(--primary); position: relative; overflow: hidden; }
        .stats-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat; opacity: 0.08; }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; position: relative; z-index: 2; }
        .stat-item { text-align: center; padding: 1.5rem; }
        .stat-item .number { font-size: 3rem; font-weight: 700; color: var(--accent); line-height: 1.1; margin-bottom: 0.5rem; }
        .stat-item .number span { font-size: 1.5rem; font-weight: 500; opacity: 0.8; }
        .stat-item .label { font-size: 1rem; color: rgba(255,255,255,0.85); font-weight: 500; }
        .stat-item .desc { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 0.35rem; }

        /* ===== Process ===== */
        .process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; position: relative; }
        .process-grid::before { content: ''; position: absolute; top: 2.5rem; left: 12%; right: 12%; height: 2px; background: var(--border-light); z-index: 0; }
        .process-step { text-align: center; position: relative; z-index: 2; }
        .process-step .step-num { width: 52px; height: 52px; border-radius: 50%; background: var(--primary); color: var(--text-white); display: flex; align-items: center; justify-content: center; margin: 0 auto 1rem; font-size: 1.25rem; font-weight: 700; box-shadow: 0 0 0 4px var(--bg-white), 0 0 0 6px var(--border-light); }
        .process-step h4 { margin-bottom: 0.5rem; }
        .process-step p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; max-width: 220px; margin: 0 auto; }

        /* ===== FAQ ===== */
        .faq-section { background: var(--bg-light); }
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
        .faq-item { background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); overflow: hidden; border: 1px solid var(--border-light); transition: all var(--transition); }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question { display: flex; align-items: center; justify-content: space-between; padding: 1.25rem 1.5rem; cursor: pointer; font-weight: 600; font-size: 1.05rem; color: var(--text-dark); background: none; border: none; width: 100%; text-align: left; transition: color var(--transition); }
        .faq-question:hover { color: var(--primary); }
        .faq-question .faq-icon { font-size: 1.1rem; color: var(--text-light); transition: transform var(--transition); flex-shrink: 0; }
        .faq-item.open .faq-question .faq-icon { transform: rotate(45deg); color: var(--primary); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; padding: 0 1.5rem; }
        .faq-item.open .faq-answer { max-height: 400px; padding: 0 1.5rem 1.25rem; }
        .faq-answer p { font-size: 0.95rem; color: var(--text-mid); line-height: 1.7; }

        /* ===== CTA ===== */
        .cta-section { background: var(--primary); position: relative; overflow: hidden; text-align: center; }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.06; }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { color: var(--text-white); margin-bottom: 1rem; }
        .cta-section p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 2rem; font-size: 1.1rem; }

        /* ===== Footer ===== */
        .site-footer { background: var(--bg-dark); color: var(--text-white); padding: 3.5rem 0 0; }
        .site-footer .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2.5rem; padding-bottom: 2.5rem; border-bottom: 1px solid rgba(255,255,255,0.08); }
        .site-footer .logo { display: inline-flex; align-items: center; gap: 0.5rem; font-size: 1.25rem; font-weight: 700; color: var(--text-white); margin-bottom: 1rem; }
        .site-footer .logo i { color: var(--accent); }
        .site-footer .logo:hover { color: var(--text-white); }
        .site-footer .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; max-width: 320px; }
        .site-footer .footer-social { display: flex; gap: 0.75rem; margin-top: 1.25rem; }
        .site-footer .footer-social a { width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.7); display: flex; align-items: center; justify-content: center; font-size: 1rem; transition: all var(--transition); }
        .site-footer .footer-social a:hover { background: var(--accent); color: var(--text-white); transform: translateY(-2px); }
        .site-footer h4 { font-size: 1rem; font-weight: 600; color: var(--text-white); margin-bottom: 1rem; }
        .site-footer ul li { margin-bottom: 0.5rem; }
        .site-footer ul li a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: color var(--transition); }
        .site-footer ul li a:hover { color: var(--accent); }
        .site-footer .footer-contact li { display: flex; align-items: center; gap: 0.6rem; color: rgba(255,255,255,0.55); font-size: 0.9rem; }
        .site-footer .footer-contact li i { width: 16px; color: var(--accent); }
        .site-footer .footer-bottom { text-align: center; padding: 1.5rem 0; font-size: 0.85rem; color: rgba(255,255,255,0.4); }

        /* ===== Modal / Form ===== */
        .modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 2000; align-items: center; justify-content: center; padding: 1rem; backdrop-filter: blur(4px); }
        .modal-overlay.open { display: flex; }
        .modal-box { background: var(--bg-white); border-radius: var(--radius-xl); padding: 2.5rem 2rem; max-width: 520px; width: 100%; box-shadow: var(--shadow-lg); position: relative; max-height: 90vh; overflow-y: auto; }
        .modal-box .close-modal { position: absolute; top: 1rem; right: 1.25rem; background: none; border: none; font-size: 1.5rem; color: var(--text-light); cursor: pointer; transition: color var(--transition); }
        .modal-box .close-modal:hover { color: var(--text-dark); }
        .modal-box h3 { margin-bottom: 0.5rem; }
        .modal-box p { font-size: 0.95rem; color: var(--text-light); margin-bottom: 1.5rem; }
        .modal-box .form-group { margin-bottom: 1.25rem; }
        .modal-box .form-group label { display: block; font-size: 0.9rem; font-weight: 500; color: var(--text-dark); margin-bottom: 0.35rem; }
        .modal-box .form-group input,
        .modal-box .form-group textarea { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--border-light); border-radius: var(--radius-md); font-size: 0.95rem; transition: border-color var(--transition), box-shadow var(--transition); background: var(--bg-light); }
        .modal-box .form-group input:focus,
        .modal-box .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(27,58,52,0.12); background: var(--bg-white); }
        .modal-box .form-group textarea { min-height: 100px; resize: vertical; }
        .modal-box .privacy-note { font-size: 0.8rem; color: var(--text-light); margin-top: 1rem; text-align: center; }
        .modal-box .btn { width: 100%; justify-content: center; }

        /* ===== Responsive ===== */
        @media screen and (max-width: 63.9375em) {
            .main-nav { display: none; }
            .nav-toggle { display: block; }
            .hero .hero-content h1 { font-size: 2.5rem; }
            .hero .hero-content p { font-size: 1.05rem; }
            .pain-grid { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
            .process-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
            .process-grid::before { display: none; }
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
            .site-footer .footer-brand p { max-width: 100%; }
            .section-padding { padding: 3rem 0; }
            .section-title { margin-bottom: 2rem; }
            .section-title h2 { font-size: 1.75rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.75rem; }
            h3 { font-size: 1.25rem; }
            .stat-item .number { font-size: 2.25rem; }
            .modal-box { padding: 2rem 1.5rem; }
        }

        @media screen and (max-width: 39.9375em) {
            .hero .hero-content h1 { font-size: 2rem; }
            .hero .hero-content p { font-size: 0.95rem; }
            .hero .hero-buttons { flex-direction: column; align-items: center; }
            .hero .hero-buttons .btn { width: 100%; max-width: 280px; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
            .stat-item { padding: 1rem; }
            .stat-item .number { font-size: 1.8rem; }
            .process-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .pain-card { padding: 1.5rem; }
            .feature-card { padding: 1.5rem; }
            .faq-question { font-size: 0.95rem; padding: 1rem 1.25rem; }
            .faq-item.open .faq-answer { padding: 0 1.25rem 1rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .section-padding { padding: 2.5rem 0; }
            .modal-box { padding: 1.5rem 1.25rem; }
        }

        @media screen and (min-width: 64em) {
            .pain-grid { grid-template-columns: repeat(2, 1fr); }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
        }

        /* ===== Misc Utilities ===== */
        .bg-light { background: var(--bg-light); }
        .mt-1 { margin-top: 1rem; }
        .mb-1 { margin-bottom: 1rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }