/* roulang page: index */
:root {
            --primary: #1A1A2E;
            --secondary: #C9A96E;
            --accent: #D4AF37;
            --bg-warm: #F8F6F1;
            --bg-dark: #0D0D1A;
            --text-body: #2C2C2C;
            --text-heading: #1A1A2E;
            --text-muted: #6B6B7B;
            --white: #FFFFFF;
            --border-light: #E8E5DF;
            --success: #2E5C4E;
            --radius-card: 8px;
            --radius-btn: 6px;
            --radius-input: 4px;
            --shadow-card: 0 2px 8px rgba(26, 26, 46, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(26, 26, 46, 0.12);
            --shadow-nav: 0 1px 4px rgba(0, 0, 0, 0.04);
            --transition: all 0.3s ease;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
            --container-max: 1200px;
            --section-gap: 100px;
        }

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

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

        body {
            font-family: var(--font-stack);
            font-size: 1rem;
            line-height: 1.8;
            font-weight: 400;
            color: var(--text-body);
            background-color: var(--bg-warm);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        button, .btn {
            cursor: pointer;
            font-family: inherit;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border: none;
            transition: var(--transition);
            font-weight: 600;
            letter-spacing: 0.04em;
            white-space: nowrap;
            border-radius: var(--radius-btn);
        }
        input {
            font-family: inherit;
            outline: none;
            border: none;
            background: transparent;
        }
        ul {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        section {
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }

        /* Header & Nav */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 64px;
            background-color: var(--white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-nav);
            z-index: 1000;
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            height: 100%;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--primary);
            font-weight: 700;
            font-size: 1.4rem;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-weight: 700;
            font-size: 1.2rem;
            box-shadow: 0 2px 6px rgba(201,169,110,0.4);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2.2rem;
            font-size: 0.95rem;
            color: #555;
            font-weight: 500;
        }
        .nav-links a {
            position: relative;
            padding: 4px 0;
            color: #555;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary);
            transition: width 0.25s ease;
        }
        .nav-links a:hover {
            color: var(--secondary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: #F5F3EE;
            border-radius: 20px;
            padding: 6px 16px;
            gap: 8px;
            color: #888;
            font-size: 0.9rem;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .search-box input {
            width: 120px;
            background: transparent;
            color: var(--text-body);
            font-size: 0.9rem;
        }
        .search-box:focus-within {
            border-color: var(--secondary);
            background: var(--white);
            box-shadow: 0 0 0 3px rgba(201,169,110,0.1);
        }
        .btn-cta-nav {
            background: var(--secondary);
            color: var(--white);
            padding: 10px 22px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 4px 10px rgba(201,169,110,0.3);
            letter-spacing: 0.5px;
        }
        .btn-cta-nav:hover {
            background: var(--accent);
            transform: translateY(-1px);
            box-shadow: 0 8px 18px rgba(212,175,55,0.4);
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            padding: 4px;
        }

        /* Hero */
        #hero {
            position: relative;
            width: 100%;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            margin-top: 0;
            padding-top: 64px;
        }
        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.88) 0%, rgba(13,13,26,0.75) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            color: var(--white);
            padding: 40px 20px;
        }
        .hero-gold-line {
            width: 50px;
            height: 3px;
            background: var(--accent);
            margin-bottom: 24px;
            border-radius: 2px;
        }
        .hero-content h1 {
            font-size: clamp(2.2rem, 5vw, 3.4rem);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            color: #fff;
        }
        .hero-content .subtitle {
            font-size: 1.25rem;
            color: rgba(255,255,255,0.88);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 600px;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
        }
        .btn-primary {
            background: var(--accent);
            color: #1A1A2E;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 700;
            border-radius: 30px;
            box-shadow: 0 6px 18px rgba(212,175,55,0.45);
            letter-spacing: 0.6px;
        }
        .btn-primary:hover {
            background: #e6c468;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(212,175,55,0.55);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255,255,255,0.7);
            color: #fff;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 30px;
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.08);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* Sections General */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .section-sub {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 48px;
            max-width: 700px;
        }
        .text-center {
            text-align: center;
        }
        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }

        /* Pain Points */
        #pain-points {
            background-color: var(--bg-warm);
        }
        .pain-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .pain-item {
            display: flex;
            gap: 24px;
            align-items: flex-start;
        }
        .pain-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.5rem;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(201,169,110,0.3);
        }
        .pain-text h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .pain-text p {
            color: #555;
            line-height: 1.8;
        }
        .pain-image img {
            border-radius: 12px;
            box-shadow: var(--shadow-card-hover);
        }

        /* Solutions */
        #solutions {
            background: var(--white);
        }
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .solution-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            text-align: center;
            border-top: 4px solid transparent;
        }
        .solution-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-top-color: var(--secondary);
        }
        .solution-card .card-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: rgba(201,169,110,0.1);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 2rem;
        }
        .solution-card h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .solution-card p {
            color: #666;
            line-height: 1.7;
        }

        /* Results */
        #results {
            background: var(--bg-dark);
            color: #fff;
        }
        .results-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .result-item {
            text-align: center;
            padding: 24px;
        }
        .result-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .result-label {
            color: rgba(255,255,255,0.75);
            font-size: 1.1rem;
            margin-top: 8px;
        }

        /* Testimonials */
        #testimonials {
            background: var(--bg-warm);
        }
        .testimonial-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .testimonial-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .testimonial-card .quote-icon {
            color: var(--secondary);
            font-size: 2rem;
            margin-bottom: 16px;
            opacity: 0.7;
        }
        .testimonial-text {
            font-size: 1.1rem;
            line-height: 1.8;
            color: #444;
            margin-bottom: 20px;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .author-avatar {
            width: 48px;
            height: 48px;
            background: #ddd;
            border-radius: 50%;
            background-image: url('/assets/images/coverpic/cover-2.webp');
            background-size: cover;
        }
        .author-info strong {
            display: block;
            color: var(--primary);
        }

        /* FAQ */
        #faq {
            background: var(--white);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        details.faq-item {
            background: #F8F6F1;
            border-radius: 8px;
            margin-bottom: 12px;
            padding: 0 20px;
            transition: var(--transition);
            border-left: 3px solid var(--secondary);
        }
        details.faq-item[open] {
            background: #fff;
            box-shadow: var(--shadow-card);
        }
        summary {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            padding: 18px 0;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
        }
        summary::-webkit-details-marker { display: none; }
        .faq-answer {
            padding-bottom: 20px;
            color: #555;
            line-height: 1.8;
        }

        /* CTA Final */
        #cta-final {
            background: linear-gradient(135deg, #1A1A2E 0%, #0D0D1A 100%);
            text-align: center;
            color: #fff;
        }
        #cta-final h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        #cta-final p {
            color: rgba(255,255,255,0.8);
            margin-bottom: 32px;
            font-size: 1.15rem;
        }

        /* Footer */
        #footer {
            background: #0D0D1A;
            color: #ccc;
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-text {
            color: #fff;
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: #aaa;
        }
        .footer-col h4 {
            color: #fff;
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .footer-col a {
            display: block;
            color: #aaa;
            margin-bottom: 8px;
            font-size: 0.9rem;
        }
        .footer-col a:hover { color: var(--accent); }
        .copyright {
            border-top: 1px solid #2a2a3a;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #777;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .cards-grid { grid-template-columns: repeat(2, 1fr); }
            .results-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-actions .search-box { display: none; }
            .mobile-menu-toggle { display: block; }
            .nav-actions .btn-cta-nav { display: none; }
            .mobile-menu-toggle { order: 2; }
            .nav-container { justify-content: space-between; }
            .pain-grid { grid-template-columns: 1fr; }
            .cards-grid { grid-template-columns: 1fr; }
            .testimonial-cards { grid-template-columns: 1fr; }
            .results-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            section { padding-top: 60px; padding-bottom: 60px; }
            .hero-content h1 { font-size: 2rem; }
            .hero-buttons { flex-direction: column; align-items: flex-start; }
            #hero { min-height: 70vh; }
            :root { --section-gap: 60px; }
        }