/* roulang page: index */
:root {
            --primary-deep-blue: #2C3E50;
            --accent-champagne: #C9A96E;
            --accent-champagne-hover: #B08E4F;
            --bg-warm-white: #F7F5F2;
            --card-white: #FFFFFF;
            --text-dark: #3A3A3A;
            --text-mid: #6B6B6B;
            --border-light: #E5E3DF;
            --success-green: #2D5A4B;
            --bg-light-blue: #EEF1F5;
            --footer-dark: #1E2A36;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.03);
            --shadow-card-hover: 0 12px 32px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-btn: 0 6px 20px rgba(201,169,110,0.3);
            --transition-base: all 0.25s ease;
            --font-h1: 32px/40px;
            --font-h2: 24px/32px;
            --font-h3: 18px/26px;
            --font-body: 16px/28px;
            --font-small: 14px/22px;
            --spacing-section: 100px;
            --spacing-gap: 24px;
            --max-width: 1200px;
        }

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

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-size: var(--font-body);
            font-weight: 400;
            color: var(--text-dark);
            background-color: var(--bg-warm-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: 72px;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--primary-deep-blue);
            margin-bottom: 0.5rem;
        }
        h1 { font-size: 2rem; line-height: 1.25; font-weight: 700; letter-spacing: -0.5px; }
        h2 { font-size: 1.5rem; line-height: 1.33; font-weight: 600; }
        h3 { font-size: 1.125rem; line-height: 1.44; font-weight: 600; }

        a {
            color: var(--accent-champagne);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-champagne-hover);
            text-decoration: underline;
        }

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

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* Buttons */
        .btn {
            display: inline-block;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            text-align: center;
            transition: var(--transition-base);
            cursor: pointer;
            border: none;
            text-decoration: none;
            line-height: 1.2;
        }
        .btn-primary {
            background-color: var(--accent-champagne);
            color: #FFFFFF;
            box-shadow: 0 4px 12px rgba(201,169,110,0.2);
        }
        .btn-primary:hover {
            background-color: var(--accent-champagne-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-2px);
            color: #FFFFFF;
            text-decoration: none;
        }
        .btn-secondary {
            background-color: transparent;
            color: var(--primary-deep-blue);
            border: 2px solid var(--primary-deep-blue);
        }
        .btn-secondary:hover {
            background-color: var(--primary-deep-blue);
            color: #FFFFFF;
            text-decoration: none;
        }
        .btn-large {
            padding: 18px 48px;
            font-size: 18px;
        }

        /* Navigation */
        .main-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background-color: var(--primary-deep-blue);
            z-index: 1000;
            display: flex;
            align-items: center;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .nav-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            text-decoration: none;
            letter-spacing: 0.5px;
        }
        .nav-logo:hover {
            color: #FFFFFF;
            text-decoration: none;
            opacity: 0.9;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-links a.nav-pill {
            display: inline-block;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.1);
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition-base);
            text-decoration: none;
        }
        .nav-links a.nav-pill:hover {
            background: rgba(255,255,255,0.2);
            color: #FFFFFF;
            text-decoration: none;
        }
        .nav-cta {
            background-color: var(--accent-champagne);
            color: #FFFFFF;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition-base);
            text-decoration: none;
        }
        .nav-cta:hover {
            background-color: var(--accent-champagne-hover);
            color: #FFFFFF;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #FFFFFF;
            font-size: 28px;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .nav-links { display: none; flex-direction: column; position: absolute; top: 72px; left: 0; width: 100%; background: var(--primary-deep-blue); padding: 20px; gap: 16px; }
            .nav-links.active { display: flex; }
            .hamburger { display: block; }
            .nav-cta { display: none; }
            .mobile-cta { display: block; }
        }
        @media (min-width: 769px) {
            .mobile-cta { display: none; }
        }

        /* Section Spacing */
        section {
            padding: var(--spacing-section) 0;
        }
        @media (max-width: 768px) {
            section { padding: 60px 0; }
        }

        /* Hero */
        .hero {
            background-color: var(--bg-warm-white);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 300px;
            height: 300px;
            border: 1px solid var(--border-light);
            border-radius: 50%;
            opacity: 0.4;
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 40px;
            align-items: center;
        }
        .hero-image-wrapper {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        @media (max-width: 768px) {
            .hero-grid {
                grid-template-columns: 1fr;
                text-align: left;
            }
            .hero-image-wrapper {
                order: -1;
                margin-bottom: 24px;
            }
        }

        /* Cards Grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) and (min-width: 769px) {
            .card-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .card-grid { grid-template-columns: 1fr; }
        }

        .card {
            background: var(--card-white);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--border-light);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            background-color: var(--success-green);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 24px;
            margin-bottom: 20px;
        }
        .card-tag {
            display: inline-block;
            background: var(--primary-deep-blue);
            color: #FFFFFF;
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .card-link {
            margin-top: auto;
            padding-top: 16px;
            font-weight: 600;
            color: var(--accent-champagne);
            text-decoration: none;
        }
        .card-link:hover {
            text-decoration: underline;
        }

        /* Testimonial Card */
        .testimonial-card {
            background: var(--card-white);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            border-left: 3px solid var(--accent-champagne);
            position: relative;
        }
        .testimonial-quote {
            font-size: 60px;
            color: var(--accent-champagne);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 12px;
        }

        /* Stats */
        .stats-bg {
            background-color: var(--bg-light-blue);
        }
        .stat-number {
            font-size: 40px;
            font-weight: 700;
            color: var(--success-green);
            line-height: 1.2;
        }

        /* Steps */
        .steps-container {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
        }
        .step-item {
            text-align: center;
            flex: 1;
            position: relative;
        }
        .step-circle {
            width: 48px;
            height: 48px;
            background: var(--primary-deep-blue);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 20px;
            margin: 0 auto 16px;
        }
        .step-connector {
            position: absolute;
            top: 24px;
            left: 60%;
            width: 80%;
            height: 1px;
            background: var(--border-light);
            z-index: 0;
        }
        @media (max-width: 768px) {
            .steps-container {
                flex-direction: column;
                gap: 32px;
            }
            .step-connector {
                display: none;
            }
        }

        /* FAQ Accordion */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 16px;
            color: var(--primary-deep-blue);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            color: var(--text-dark);
        }
        .faq-item.active .faq-answer {
            max-height: 200px;
            padding-top: 16px;
        }

        /* CTA Section */
        .cta-dark {
            background-color: var(--primary-deep-blue);
            color: #FFFFFF;
            text-align: center;
        }
        .cta-dark h2 {
            color: #FFFFFF;
        }

        /* Footer */
        .footer {
            background-color: var(--footer-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 14px;
        }