/* roulang page: index */
:root {
            --bg-deep: #0C0C14;
            --bg-card: #161622;
            --bg-light: #F7F7FA;
            --accent-primary: #00E5A0;
            --accent-primary-hover: #00F0B0;
            --accent-warm: #F59E0B;
            --text-light-primary: #F0F0F5;
            --text-light-secondary: #9A9AB0;
            --text-light-tertiary: #5C5C70;
            --text-dark-primary: #1A1A28;
            --text-dark-secondary: #5C5C70;
            --card-border-light: rgba(255, 255, 255, 0.04);
            --card-border-soft: #E8E8EF;
            --shadow-deep: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-card-light: 0 1px 3px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-glow: 0 1px 0 0 rgba(255, 255, 255, 0.04);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 10px;
            --radius-xl: 12px;
            --font-stack-cn: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-stack-num: "Inter", "SF Mono", "JetBrains Mono", monospace;
            --container-max: 1200px;
            --nav-height: 64px;
            --section-gap-desktop: 120px;
            --section-gap-mobile: 70px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-card: 0.3s ease-out;
            --transition-faq: 0.35s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-stack-cn);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-light-primary);
            background-color: var(--bg-deep);
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            outline: none;
        }

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

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

        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== NAVIGATION ========== */
        #nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: background 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
            background: transparent;
            border-bottom: 1px solid transparent;
        }

        #nav.scrolled {
            background: rgba(12, 12, 20, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 1px 20px rgba(0, 0, 0, 0.3);
        }

        #nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (max-width: 576px) {
            #nav .nav-inner {
                padding: 0 16px;
            }
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-light-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            z-index: 1001;
            flex-shrink: 0;
        }

        .nav-brand .brand-icon {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
        }

        .nav-brand .brand-icon svg {
            width: 100%;
            height: 100%;
        }

        .nav-brand .brand-icon .ring {
            fill: none;
            stroke: var(--accent-primary);
            stroke-width: 2;
        }

        .nav-brand .brand-icon .crosshair {
            fill: none;
            stroke: var(--accent-primary);
            stroke-width: 1.8;
            stroke-linecap: round;
        }

        .nav-brand .brand-icon .dot {
            fill: var(--accent-primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light-secondary);
            letter-spacing: 0.01em;
        }

        .nav-links a {
            position: relative;
            padding: 6px 0;
            color: var(--text-light-secondary);
            transition: color var(--transition-fast);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-primary);
            transition: width var(--transition-fast);
            border-radius: 1px;
        }

        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: var(--text-light-primary);
        }

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

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1.5px solid var(--accent-primary);
            color: var(--accent-primary);
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            white-space: nowrap;
            flex-shrink: 0;
            background: transparent;
        }

        .nav-cta-btn:hover {
            background: var(--accent-primary);
            color: var(--bg-deep);
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.25);
            transform: scale(1.03);
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 8px 4px;
            background: none;
            border: none;
            width: 36px;
            height: 28px;
            justify-content: center;
            align-items: center;
        }

        .nav-hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-light-primary);
            border-radius: 1px;
            transition: all 0.3s ease;
            transform-origin: center;
        }

        .nav-hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta-btn.desktop-only {
                display: none;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-cta-btn.mobile-cta {
                display: inline-flex;
                font-size: 12px;
                padding: 6px 12px;
            }
        }

        @media (min-width: 769px) {
            .nav-cta-btn.mobile-cta {
                display: none;
            }
        }

        .mobile-menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(12, 12, 20, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }

        .mobile-menu-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu-overlay a {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-light-primary);
            letter-spacing: 0.02em;
            transition: color var(--transition-fast);
        }

        .mobile-menu-overlay a:hover {
            color: var(--accent-primary);
        }

        .mobile-menu-overlay .mobile-close {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 28px;
            color: var(--text-light-primary);
            cursor: pointer;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: background var(--transition-fast);
        }
        .mobile-menu-overlay .mobile-close:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* ========== HERO ========== */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background-color: var(--bg-deep);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            isolation: isolate;
        }

        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(12, 12, 20, 0.55) 0%, rgba(12, 12, 20, 0.78) 60%, rgba(12, 12, 20, 0.92) 100%);
            z-index: 1;
            pointer-events: none;
        }

        #hero::after {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            border: 1.5px solid rgba(0, 229, 160, 0.08);
            z-index: 0;
            pointer-events: none;
            animation: radar-scan 12s linear infinite;
        }

        @keyframes radar-scan {
            0% {
                transform: rotate(0deg) scale(1);
                opacity: 0.06;
            }
            25% {
                opacity: 0.14;
            }
            50% {
                transform: rotate(180deg) scale(1.3);
                opacity: 0.06;
            }
            75% {
                opacity: 0.02;
            }
            100% {
                transform: rotate(360deg) scale(1);
                opacity: 0.06;
            }
        }

        #hero .radar-arc {
            position: absolute;
            top: -80px;
            right: -80px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            border: 1px solid rgba(0, 229, 160, 0.05);
            z-index: 0;
            pointer-events: none;
            animation: radar-arc-rotate 18s linear infinite;
        }

        @keyframes radar-arc-rotate {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }

        #hero .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            padding: 40px 20px;
            animation: hero-fade-up 0.9s ease-out;
        }

        @keyframes hero-fade-up {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        #hero h1 {
            font-size: 56px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-light-primary);
            line-height: 1.15;
            margin-bottom: 20px;
            text-shadow: 0 2px 40px rgba(0, 0, 0, 0.5);
        }

        #hero h1 .highlight {
            color: var(--accent-primary);
            position: relative;
        }

        #hero .hero-subtitle {
            font-size: 18px;
            color: var(--text-light-secondary);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        #hero .hero-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: var(--accent-primary);
            color: var(--bg-deep);
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 24px rgba(0, 229, 160, 0.3);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        #hero .hero-cta:hover {
            background: var(--accent-primary-hover);
            transform: scale(1.04);
            box-shadow: 0 6px 32px rgba(0, 229, 160, 0.45);
        }

        #hero .hero-cta:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 4px;
        }

        @media (max-width: 768px) {
            #hero h1 {
                font-size: 38px;
                letter-spacing: -0.015em;
            }
            #hero .hero-subtitle {
                font-size: 16px;
                margin-bottom: 28px;
            }
            #hero .hero-cta {
                padding: 13px 30px;
                font-size: 15px;
                width: 100%;
                max-width: 320px;
            }
            #hero::after {
                width: 300px;
                height: 300px;
                top: -60px;
                right: -60px;
            }
            #hero .radar-arc {
                width: 240px;
                height: 240px;
                top: -40px;
                right: -40px;
            }
        }

        @media (max-width: 576px) {
            #hero h1 {
                font-size: 30px;
            }
            #hero .hero-subtitle {
                font-size: 15px;
            }
            #hero {
                min-height: 90vh;
            }
            #hero .hero-cta {
                padding: 12px 24px;
                font-size: 14px;
                max-width: 280px;
            }
        }

        /* ========== SECTIONS GENERAL ========== */
        section {
            padding: var(--section-gap-desktop) 0;
        }

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

        .section-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-primary);
            margin-bottom: 12px;
        }

        h2.section-title {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-light-primary);
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-light-secondary);
            line-height: 1.7;
            max-width: 560px;
        }

        @media (max-width: 768px) {
            h2.section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
            }
        }

        @media (max-width: 576px) {
            h2.section-title {
                font-size: 22px;
            }
        }

        /* ========== PAIN SECTION ========== */
        #pain {
            background-color: var(--bg-deep);
        }

        #pain .pain-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 32px 48px;
            margin-top: 48px;
            align-items: start;
        }

        #pain .pain-item {
            position: relative;
            padding: 28px 32px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--card-border-light);
            box-shadow: var(--shadow-glow), var(--shadow-deep);
            transition: var(--transition-card);
        }

        #pain .pain-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow), 0 12px 40px rgba(0, 0, 0, 0.5);
            border-color: rgba(0, 229, 160, 0.1);
        }

        #pain .pain-item.featured {
            grid-row: span 2;
            padding: 36px 36px;
        }

        #pain .pain-number {
            font-family: var(--font-stack-num);
            font-size: 72px;
            font-weight: 700;
            color: rgba(0, 229, 160, 0.07);
            position: absolute;
            top: 16px;
            right: 24px;
            line-height: 1;
            pointer-events: none;
            letter-spacing: -0.03em;
        }

        #pain .pain-item h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-light-primary);
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
            letter-spacing: -0.005em;
        }

        #pain .pain-item p {
            font-size: 15px;
            color: var(--text-light-secondary);
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        #pain .pain-icon {
            width: 36px;
            height: 36px;
            margin-bottom: 16px;
            color: var(--accent-primary);
            stroke-width: 2;
        }

        @media (max-width: 768px) {
            #pain .pain-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-top: 32px;
            }
            #pain .pain-item.featured {
                grid-row: span 1;
                padding: 24px 24px;
            }
            #pain .pain-item {
                padding: 24px 24px;
            }
            #pain .pain-number {
                font-size: 52px;
                top: 10px;
                right: 16px;
            }
            #pain .pain-item h3 {
                font-size: 18px;
            }
        }

        /* ========== SOLUTION SECTION ========== */
        #solution {
            background-color: var(--bg-deep);
            position: relative;
        }

        #solution .solution-layout {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            grid-template-rows: auto auto;
            gap: 28px;
            margin-top: 48px;
        }

        #solution .solution-card {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--card-border-light);
            box-shadow: var(--shadow-glow), var(--shadow-deep);
            overflow: hidden;
            transition: var(--transition-card);
            display: flex;
            flex-direction: column;
        }

        #solution .solution-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow), 0 14px 44px rgba(0, 0, 0, 0.55);
            border-color: rgba(0, 229, 160, 0.12);
        }

        #solution .solution-card.primary {
            grid-row: span 2;
        }

        #solution .solution-card.primary .card-img {
            height: 260px;
            overflow: hidden;
        }

        #solution .solution-card.primary .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        #solution .solution-card.primary:hover .card-img img {
            transform: scale(1.04);
        }

        #solution .solution-card .card-body {
            padding: 28px 32px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        #solution .solution-card.primary .card-body {
            padding: 32px 36px;
        }

        #solution .solution-card .card-icon {
            width: 40px;
            height: 40px;
            color: var(--accent-primary);
            flex-shrink: 0;
            stroke-width: 2;
        }

        #solution .solution-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-light-primary);
            letter-spacing: -0.005em;
        }

        #solution .solution-card p {
            font-size: 15px;
            color: var(--text-light-secondary);
            line-height: 1.7;
        }

        #solution .solution-card.secondary {
            flex-direction: row;
            align-items: flex-start;
            gap: 20px;
            padding: 24px 28px;
        }

        #solution .solution-card.secondary .card-icon {
            width: 34px;
            height: 34px;
            flex-shrink: 0;
        }

        #solution .solution-card.secondary .card-text {
            flex: 1;
        }

        #solution .solution-card.secondary h3 {
            font-size: 18px;
        }

        @media (max-width: 992px) {
            #solution .solution-layout {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
                margin-top: 36px;
            }
            #solution .solution-card.primary {
                grid-column: 1 / -1;
                grid-row: span 1;
                flex-direction: column;
            }
            #solution .solution-card.primary .card-img {
                height: 200px;
            }
        }

        @media (max-width: 768px) {
            #solution .solution-layout {
                grid-template-columns: 1fr;
                gap: 18px;
                margin-top: 28px;
            }
            #solution .solution-card.primary .card-img {
                height: 180px;
            }
            #solution .solution-card.primary .card-body {
                padding: 24px 24px;
            }
            #solution .solution-card.secondary {
                flex-direction: column;
                gap: 12px;
                padding: 20px 22px;
            }
            #solution .solution-card .card-body {
                padding: 20px 22px;
            }
        }

        /* ========== RESULTS SECTION ========== */
        #results {
            background-color: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.03);
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
            position: relative;
        }

        #results .results-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0;
            text-align: center;
        }

        #results .result-item {
            flex: 1 1 200px;
            padding: 32px 28px;
            position: relative;
        }

        #results .result-item+.result-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 20%;
            height: 60%;
            width: 1px;
            background: rgba(255, 255, 255, 0.08);
        }

        #results .result-number {
            font-family: var(--font-stack-num);
            font-size: 56px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--accent-primary);
            line-height: 1;
            margin-bottom: 8px;
            transition: color 0.5s ease;
        }

        #results .result-item:nth-child(2) .result-number {
            color: var(--accent-warm);
        }
        #results .result-item:nth-child(3) .result-number {
            color: var(--accent-primary);
        }
        #results .result-item:nth-child(4) .result-number {
            color: var(--accent-warm);
        }

        #results .result-label {
            font-size: 14px;
            color: var(--text-light-secondary);
            letter-spacing: 0.02em;
            font-weight: 500;
        }

        @media (max-width: 768px) {
            #results .result-item {
                flex: 1 1 45%;
                padding: 24px 16px;
            }
            #results .result-item+.result-item::before {
                display: none;
            }
            #results .result-item:nth-child(odd)::after {
                content: '';
                position: absolute;
                right: 0;
                top: 20%;
                height: 60%;
                width: 1px;
                background: rgba(255, 255, 255, 0.06);
            }
            #results .result-number {
                font-size: 42px;
            }
        }

        @media (max-width: 576px) {
            #results .result-item {
                flex: 1 1 100%;
                padding: 18px 16px;
            }
            #results .result-item:nth-child(odd)::after {
                display: none;
            }
            #results .result-item+.result-item {
                border-top: 1px solid rgba(255, 255, 255, 0.05);
            }
            #results .result-number {
                font-size: 38px;
            }
        }

        /* ========== TESTIMONIALS SECTION ========== */
        #testimonials {
            background-color: var(--bg-light);
        }

        #testimonials .section-title {
            color: var(--text-dark-primary);
        }
        #testimonials .section-subtitle {
            color: var(--text-dark-secondary);
        }
        #testimonials .section-label {
            color: #0a9e6e;
        }

        #testimonials .testimonials-row {
            display: flex;
            gap: 28px;
            margin-top: 48px;
            flex-wrap: wrap;
            justify-content: center;
        }

        #testimonials .testimonial-card {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            padding: 32px 30px;
            box-shadow: var(--shadow-card-light);
            border: 1px solid var(--card-border-soft);
            flex: 1 1 320px;
            max-width: 380px;
            transition: var(--transition-card);
            position: relative;
        }

        #testimonials .testimonial-card:nth-child(1) {
            margin-top: 0;
        }
        #testimonials .testimonial-card:nth-child(2) {
            margin-top: 24px;
        }
        #testimonials .testimonial-card:nth-child(3) {
            margin-top: 8px;
        }

        #testimonials .testimonial-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
        }

        #testimonials .quote-mark {
            font-family: var(--font-stack-num);
            font-size: 80px;
            line-height: 1;
            color: rgba(0, 229, 160, 0.13);
            position: absolute;
            top: 14px;
            left: 22px;
            pointer-events: none;
            letter-spacing: -0.04em;
        }

        #testimonials .testimonial-card blockquote {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-dark-primary);
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
            font-style: normal;
        }

        #testimonials .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        #testimonials .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #e0e0e8;
            flex-shrink: 0;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #5C5C70;
            font-size: 16px;
        }

        #testimonials .author-info .author-name {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark-primary);
        }

        #testimonials .author-info .author-role {
            font-size: 13px;
            color: var(--text-dark-secondary);
        }

        @media (max-width: 768px) {
            #testimonials .testimonials-row {
                gap: 18px;
                margin-top: 32px;
            }
            #testimonials .testimonial-card {
                flex: 1 1 100%;
                max-width: 100%;
                padding: 24px 22px;
            }
            #testimonials .testimonial-card:nth-child(2) {
                margin-top: 0;
            }
            #testimonials .testimonial-card:nth-child(3) {
                margin-top: 0;
            }
            #testimonials .quote-mark {
                font-size: 56px;
                top: 8px;
                left: 14px;
            }
        }

        /* ========== CTA SECTION ========== */
        #cta {
            background: linear-gradient(180deg, #0C0C14 0%, #161622 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        #cta::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 229, 160, 0.04) 0%, transparent 70%);
            pointer-events: none;
        }

        #cta .cta-content {
            position: relative;
            z-index: 1;
        }

        #cta h2 {
            font-size: 38px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-light-primary);
            margin-bottom: 14px;
        }

        #cta .cta-subtitle {
            font-size: 17px;
            color: var(--text-light-secondary);
            margin-bottom: 32px;
            line-height: 1.6;
        }

        #cta .cta-btn-large {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 15px 40px;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: var(--accent-primary);
            color: var(--bg-deep);
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 28px rgba(0, 229, 160, 0.35);
            border: none;
            cursor: pointer;
            text-decoration: none;
            margin-bottom: 20px;
        }

        #cta .cta-btn-large:hover {
            background: var(--accent-primary-hover);
            transform: scale(1.04);
            box-shadow: 0 8px 36px rgba(0, 229, 160, 0.5);
        }

        #cta .cta-trust {
            font-size: 13px;
            color: var(--text-light-tertiary);
            letter-spacing: 0.02em;
        }

        @media (max-width: 768px) {
            #cta h2 {
                font-size: 28px;
            }
            #cta .cta-subtitle {
                font-size: 15px;
            }
            #cta .cta-btn-large {
                padding: 14px 32px;
                font-size: 15px;
                width: 100%;
                max-width: 340px;
            }
            #cta::before {
                width: 350px;
                height: 350px;
            }
        }

        @media (max-width: 576px) {
            #cta h2 {
                font-size: 24px;
            }
            #cta .cta-btn-large {
                max-width: 280px;
                padding: 13px 24px;
                font-size: 14px;
            }
        }

        /* ========== FAQ SECTION ========== */
        #faq {
            background-color: var(--bg-light);
        }

        #faq .section-title {
            color: var(--text-dark-primary);
        }
        #faq .section-subtitle {
            color: var(--text-dark-secondary);
        }
        #faq .section-label {
            color: #0a9e6e;
        }

        #faq .faq-list {
            margin-top: 44px;
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 800px;
        }

        #faq .faq-item {
            border-bottom: 1px solid var(--card-border-soft);
            overflow: hidden;
        }

        #faq .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 20px 8px;
            text-align: left;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark-primary);
            cursor: pointer;
            background: none;
            border: none;
            letter-spacing: -0.005em;
            transition: color var(--transition-fast);
            gap: 16px;
            font-family: var(--font-stack-cn);
        }

        #faq .faq-question:hover {
            color: #0a9e6e;
        }

        #faq .faq-question[aria-expanded="true"] {
            color: #0a9e6e;
        }

        #faq .faq-arrow {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            transition: transform var(--transition-faq);
            color: var(--text-dark-secondary);
            stroke-width: 2.5;
        }

        #faq .faq-question[aria-expanded="true"] .faq-arrow {
            transform: rotate(180deg);
            color: #0a9e6e;
        }

        #faq .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-faq), padding var(--transition-faq);
        }

        #faq .faq-answer.open {
            max-height: 300px;
        }

        #faq .faq-answer p {
            padding: 0 8px 20px 8px;
            font-size: 15px;
            color: var(--text-dark-secondary);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            #faq .faq-list {
                margin-top: 28px;
            }
            #faq .faq-question {
                font-size: 15px;
                padding: 16px 4px;
            }
            #faq .faq-answer p {
                font-size: 14px;
                padding: 0 4px 16px 4px;
            }
        }

        /* ========== FOOTER ========== */
        #footer {
            background-color: var(--bg-deep);
            padding: 48px 0 32px;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        #footer .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-light-primary);
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        #footer .footer-social {
            display: flex;
            justify-content: center;
            gap: 18px;
            margin-bottom: 20px;
        }

        #footer .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light-secondary);
            transition: all var(--transition-smooth);
        }

        #footer .footer-social a:hover {
            background: rgba(0, 229, 160, 0.12);
            color: var(--accent-primary);
            transform: translateY(-2px);
        }

        #footer .footer-contact {
            font-size: 14px;
            color: var(--text-light-secondary);
            margin-bottom: 8px;
        }

        #footer .footer-contact a {
            color: var(--accent-primary);
            transition: color var(--transition-fast);
        }
        #footer .footer-contact a:hover {
            color: var(--accent-primary-hover);
        }

        #footer .footer-copy {
            font-size: 13px;
            color: var(--text-light-tertiary);
            letter-spacing: 0.02em;
        }

        #footer .footer-copy a {
            color: var(--text-light-secondary);
            transition: color var(--transition-fast);
        }
        #footer .footer-copy a:hover {
            color: var(--accent-primary);
        }

        @media (max-width: 576px) {
            #footer {
                padding: 36px 0 24px;
            }
            #footer .footer-social {
                gap: 12px;
            }
        }

        /* ========== FADE-IN ANIMATION ========== */
        .fade-in-section {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in-section.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .fade-in-section.delay-1 {
            transition-delay: 0.1s;
        }
        .fade-in-section.delay-2 {
            transition-delay: 0.2s;
        }
        .fade-in-section.delay-3 {
            transition-delay: 0.3s;
        }

        /* ========== BACK TO TOP ========== */
        #back-to-top {
            display: inline-block;
            margin-top: 6px;
            font-size: 13px;
            color: var(--text-light-tertiary);
            cursor: pointer;
            transition: color var(--transition-fast);
            background: none;
            border: none;
            font-family: inherit;
        }
        #back-to-top:hover {
            color: var(--accent-primary);
        }

        /* Utility: visually hidden but accessible */
        .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;
        }