/* roulang page: index */
:root {
            --gradient-main: linear-gradient(135deg, #FF5E3A 0%, #FF2A68 100%);
            --color-primary-start: #FF5E3A;
            --color-primary-end: #FF2A68;
            --color-dark: #1E1E2C;
            --color-dark-secondary: #2A2A3C;
            --color-bg: #FAFAFC;
            --color-white: #FFFFFF;
            --color-text: #1E1E2C;
            --color-text-secondary: #5A5A6E;
            --color-text-muted: #8A8A9A;
            --color-border: #E0E0E0;
            --color-faq-bg: #f0f2ff;
            --radius-card: 16px;
            --radius-badge: 8px;
            --radius-button: 50px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.05);
            --shadow-card-hover: 0 12px 36px rgba(0, 0, 0, 0.1);
            --shadow-button: 0 6px 20px rgba(255, 94, 58, 0.35);
            --shadow-button-hover: 0 10px 28px rgba(255, 42, 104, 0.45);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --spacing-section: 80px;
            --spacing-section-mobile: 60px;
            --spacing-title-content: 24px;
            --padding-card: 32px;
            --nav-height: 64px;
            --transition-speed: 0.3s;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
            font-size: 16px;
        }

        body {
            font-family: var(--font-stack);
            font-weight: 400;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-speed) ease;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        input {
            width: 100%;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== HEADER & NAV ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: var(--color-white);
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            transition: box-shadow var(--transition-speed) ease;
        }

        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--color-dark);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--gradient-main);
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        .logo-text {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-weight: 700;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition-speed) ease;
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--gradient-main);
            transition: width var(--transition-speed) ease;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--color-primary-start);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            padding: 10px 22px;
            border-radius: var(--radius-button);
            background: var(--gradient-main);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease;
            box-shadow: var(--shadow-button);
        }

        .nav-cta-btn:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-1px);
            color: #fff;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            z-index: 1001;
            background: none;
            border: none;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            border-radius: 3px;
            background: var(--color-dark);
            transition: all var(--transition-speed) ease;
        }

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

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

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

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: var(--color-white);
                flex-direction: column;
                align-items: flex-start;
                padding: 80px 28px 40px;
                gap: 20px;
                box-shadow: -4px 0 30px rgba(0, 0, 0, 0.1);
                transition: right var(--transition-speed) ease;
                z-index: 999;
            }

            .nav-links.open {
                right: 0;
            }

            .nav-links a {
                font-size: 1.05rem;
                width: 100%;
                padding: 8px 0;
            }

            .nav-cta-btn {
                margin-top: 8px;
                width: 100%;
                justify-content: center;
            }

            .hamburger {
                display: flex;
            }

            .header-inner {
                padding: 0 16px;
            }

            .logo-link {
                font-size: 1.15rem;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
                border-radius: 8px;
            }
        }

        @media (max-width: 520px) {
            .nav-links {
                width: 100%;
                right: -100%;
            }

            .nav-links.open {
                right: 0;
            }

            .logo-link {
                font-size: 1rem;
            }

            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.85rem;
                border-radius: 7px;
            }
        }

        /* ===== HERO ===== */
        .hero {
            min-height: 70vh;
            display: flex;
            align-items: center;
            background: linear-gradient(120deg, #1E1E2C 0%, #2A2A3C 100%);
            position: relative;
            overflow: hidden;
            padding-top: var(--nav-height);
            margin-top: 0;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 60%;
            height: 140%;
            background: linear-gradient(135deg, rgba(255, 94, 58, 0.12) 0%, rgba(255, 42, 104, 0.08) 100%);
            border-radius: 50%;
            filter: blur(80px);
            z-index: 0;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -15%;
            right: -8%;
            width: 45%;
            height: 100%;
            background: radial-gradient(circle, rgba(255, 94, 58, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            filter: blur(60px);
            z-index: 0;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding-top: 40px;
            padding-bottom: 50px;
        }

        .hero-badge-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            margin-bottom: 28px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            white-space: nowrap;
            backdrop-filter: blur(4px);
        }

        .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--gradient-main);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.6);
            }
        }

        .hero h1 {
            font-size: 2.75rem;
            font-weight: 700;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 20px;
            max-width: 700px;
            letter-spacing: 0.01em;
        }

        .hero h1 .highlight {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 34px;
            border-radius: var(--radius-button);
            background: var(--gradient-main);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: var(--shadow-button);
            transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease, filter var(--transition-speed) ease;
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-2px);
            filter: brightness(1.08);
            color: #fff;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 34px;
            border-radius: var(--radius-button);
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            transition: border-color var(--transition-speed) ease, background var(--transition-speed) ease, transform var(--transition-speed) ease;
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
            color: #fff;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 65vh;
            }

            .hero h1 {
                font-size: 2rem;
                max-width: 100%;
            }

            .hero-subtitle {
                font-size: 1rem;
                max-width: 100%;
            }

            .hero-badge-row {
                gap: 8px;
            }

            .hero-badge {
                font-size: 0.78rem;
                padding: 6px 12px;
            }

            .btn-primary,
            .btn-outline {
                padding: 12px 26px;
                font-size: 0.95rem;
                width: 100%;
                max-width: 280px;
            }

            .hero-cta-group {
                flex-direction: column;
                align-items: center;
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.7rem;
            }

            .hero-subtitle {
                font-size: 0.9rem;
            }

            .hero-badge {
                font-size: 0.72rem;
                padding: 5px 10px;
            }
        }

        /* ===== SECTIONS COMMON ===== */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-dark);
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }

        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-secondary);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.65;
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-section-mobile) 0;
            }

            .section-header {
                margin-bottom: 36px;
            }

            .section-header h2 {
                font-size: 1.75rem;
            }

            .section-header .section-subtitle {
                font-size: 0.95rem;
                max-width: 100%;
            }
        }

        /* ===== DATA DASHBOARD ===== */
        .dashboard-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .dashboard-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: var(--padding-card);
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease;
            position: relative;
            overflow: hidden;
        }

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

        .dashboard-card .dash-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(255, 94, 58, 0.08);
            margin-bottom: 18px;
            font-size: 1.5rem;
            color: var(--color-primary-start);
        }

        .dashboard-card .dash-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .dashboard-card .dash-label {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            font-weight: 500;
            margin-bottom: 6px;
        }

        .dashboard-card .dash-desc {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        .dashboard-card .dash-badge {
            display: inline-block;
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            background: var(--gradient-main);
            color: #fff;
            font-size: 0.82rem;
            font-weight: 600;
            margin-top: 10px;
            animation: badge-pulse 2.5s ease-in-out infinite;
        }

        @keyframes badge-pulse {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.03);
            }
        }

        @media (max-width: 768px) {
            .dashboard-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .dashboard-card .dash-number {
                font-size: 2rem;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .dashboard-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }

            .dashboard-card {
                padding: 24px 20px;
            }

            .dashboard-card .dash-number {
                font-size: 2rem;
            }
        }

        /* ===== SERVICE MATRIX ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: var(--padding-card);
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease;
            position: relative;
            display: flex;
            flex-direction: column;
        }

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

        .service-card .service-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            background: var(--gradient-main);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            white-space: nowrap;
            animation: badge-pulse 2.5s ease-in-out infinite;
        }

        .service-card .service-icon-wrap {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            background: rgba(255, 94, 58, 0.06);
            border: 2px solid rgba(255, 94, 58, 0.18);
        }

        .service-card .service-icon-wrap i {
            font-size: 1.4rem;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .service-card h3 {
            font-size: 1.375rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .service-card .service-desc {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
            flex-grow: 1;
            margin-bottom: 16px;
        }

        .service-card .service-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--color-border);
        }

        .service-card .service-meta i {
            color: var(--color-primary-start);
            font-size: 0.75rem;
        }

        @media (max-width: 768px) {
            .service-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .service-card {
                padding: 24px 20px;
            }

            .service-card h3 {
                font-size: 1.2rem;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .service-card {
                padding: 26px 24px;
            }
        }

        /* ===== COMPARISON ===== */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: stretch;
        }

        .comparison-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: var(--padding-card);
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease;
            position: relative;
        }

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

        .comparison-card.vs-old {
            border-left: 4px solid #d0d0d8;
        }

        .comparison-card.vs-new {
            border-left: 4px solid var(--color-primary-start);
            background: linear-gradient(180deg, #fff 0%, rgba(255, 94, 58, 0.02) 100%);
        }

        .comparison-card .comp-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .vs-old .comp-tag {
            background: #e8e8ec;
            color: #6a6a78;
        }

        .vs-new .comp-tag {
            background: var(--gradient-main);
            color: #fff;
        }

        .comparison-card h3 {
            font-size: 1.375rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--color-dark);
            line-height: 1.3;
        }

        .comparison-card ul {
            list-style: none;
            padding: 0;
        }

        .comparison-card ul li {
            padding: 10px 0;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.5;
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
        }

        .comparison-card ul li:last-child {
            border-bottom: none;
        }

        .comparison-card ul li i {
            flex-shrink: 0;
            margin-top: 3px;
            font-size: 0.85rem;
        }

        .vs-old ul li i {
            color: #c0c0c8;
        }

        .vs-new ul li i {
            color: var(--color-primary-start);
        }

        .comparison-highlight {
            margin-top: 18px;
            padding: 14px 18px;
            background: rgba(255, 94, 58, 0.05);
            border-radius: 12px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-primary-start);
            text-align: center;
        }

        @media (max-width: 768px) {
            .comparison-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .comparison-card {
                padding: 24px 20px;
            }

            .comparison-card h3 {
                font-size: 1.2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-white);
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
            transition: box-shadow var(--transition-speed) ease;
        }

        .faq-item.active {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-dark);
            cursor: pointer;
            border: none;
            background: transparent;
            text-align: left;
            gap: 16px;
            transition: background var(--transition-speed) ease;
            font-family: var(--font-stack);
        }

        .faq-question:hover {
            background: rgba(255, 94, 58, 0.03);
        }

        .faq-item.active .faq-question {
            background: var(--color-faq-bg);
        }

        .faq-arrow {
            flex-shrink: 0;
            font-size: 0.85rem;
            color: var(--color-primary-start);
            transition: transform var(--transition-speed) ease;
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: var(--color-faq-bg);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }

            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 0.88rem;
            }
        }

        /* ===== CTA FORM ===== */
        .cta-section {
            background: linear-gradient(180deg, #FAFAFC 0%, #f0f0f6 100%);
            padding: var(--spacing-section) 0;
        }

        .cta-card {
            max-width: 600px;
            margin: 0 auto;
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: 40px var(--padding-card);
            box-shadow: var(--shadow-card);
            text-align: center;
        }

        .cta-card h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 10px;
        }

        .cta-card .cta-subtitle {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            margin-bottom: 28px;
        }

        .form-group {
            margin-bottom: 18px;
            text-align: left;
        }

        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 13px 16px;
            border: 2px solid var(--color-border);
            border-radius: 12px;
            font-size: 0.95rem;
            background: #FAFAFC;
            color: var(--color-text);
            transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
            font-family: var(--font-stack);
            resize: vertical;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--color-primary-start);
            box-shadow: 0 0 0 3px rgba(255, 94, 58, 0.08);
            background: #fff;
            outline: none;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: #b0b0b8;
        }

        .form-submit-btn {
            width: 100%;
            padding: 15px;
            border-radius: var(--radius-button);
            background: var(--gradient-main);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            border: none;
            box-shadow: var(--shadow-button);
            transition: box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease, filter var(--transition-speed) ease;
            margin-top: 6px;
            font-family: var(--font-stack);
        }

        .form-submit-btn:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-2px);
            filter: brightness(1.08);
        }

        @media (max-width: 768px) {
            .cta-card {
                padding: 28px 20px;
                margin: 0 8px;
            }

            .cta-card h2 {
                font-size: 1.5rem;
            }
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--color-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand .footer-logo .logo-icon-sm {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: var(--gradient-main);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 800;
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-links h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links ul {
            list-style: none;
            padding: 0;
        }

        .footer-links ul li {
            margin-bottom: 10px;
        }

        .footer-links ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-speed) ease;
            cursor: pointer;
        }

        .footer-links ul li a:hover {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                text-align: center;
            }

            .footer-brand .footer-logo {
                justify-content: center;
            }

            .site-footer {
                padding: 36px 0 20px;
            }
        }

        /* ===== BACK TO TOP ===== */
        .back-to-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--gradient-main);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            cursor: pointer;
            z-index: 900;
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: all var(--transition-speed) ease;
            box-shadow: var(--shadow-button);
            border: none;
        }

        .back-to-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .back-to-top:hover {
            box-shadow: var(--shadow-button-hover);
            transform: translateY(-3px);
        }

        @media (max-width: 768px) {
            .back-to-top {
                bottom: 20px;
                right: 16px;
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        /* ===== MOBILE MENU OVERLAY ===== */
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.35);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-speed) ease;
        }

        .mobile-overlay.show {
            display: block;
            opacity: 1;
        }

        @media (min-width: 769px) {
            .mobile-overlay {
                display: none !important;
            }
        }

        /* ===== FOCUS VISIBLE ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-primary-start);
            outline-offset: 2px;
        }

        /* ===== UTILITY ===== */
        .text-center {
            text-align: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }