/* roulang page: index */
:root {
            --color-primary: #0f172a;
            --color-primary-light: #1e293b;
            --color-brand: #0ea5e9;
            --color-brand-hover: #0284c7;
            --color-accent: #10b981;
            --color-accent-hover: #059669;
            --color-warning: #f59e0b;
            --color-bg: #ffffff;
            --color-bg-soft: #f8fafc;
            --color-bg-muted: #f1f5f9;
            --color-text: #0f172a;
            --color-text-secondary: #475569;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-white: #ffffff;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 6px 16px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
            --shadow-xl: 0 24px 60px rgba(15, 23, 42, 0.16);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 96px;
            --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            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 {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--color-brand);
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background-color: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background-color var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            background-color: rgba(15, 23, 42, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-white);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-accent) 100%);
            font-size: 1.05rem;
            font-weight: 800;
            color: var(--color-white);
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--color-white);
        }

        .logo:hover .logo-icon {
            transform: scale(1.05);
        }

        .logo-icon {
            transition: transform var(--transition-fast);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.925rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.78);
            transition: color var(--transition-fast), background-color var(--transition-fast);
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--color-white);
            background-color: rgba(255, 255, 255, 0.08);
        }

        .main-nav a.active {
            color: var(--color-white);
            background-color: rgba(14, 165, 233, 0.2);
            box-shadow: inset 0 0 0 1px rgba(14, 165, 233, 0.4);
        }

        .main-nav a:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-accent) 100%);
            color: var(--color-white);
            font-weight: 600;
            font-size: 0.9rem;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }

        .nav-cta:hover {
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(14, 165, 233, 0.35);
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 10px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.08);
            transition: background-color var(--transition-fast);
        }

        .mobile-menu-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: var(--color-white);
            border-radius: 2px;
            transition: transform var(--transition-base), opacity var(--transition-base);
        }

        .mobile-menu-toggle:hover {
            background-color: rgba(255, 255, 255, 0.16);
        }

        .mobile-menu-toggle:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
        }

        .mobile-menu-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .mobile-menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .mobile-menu-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav {
            display: none;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            background-color: rgba(15, 23, 42, 0.98);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-nav.open {
            display: flex;
        }

        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }

        .mobile-nav a:hover {
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-white);
        }

        .mobile-nav a.active {
            background-color: rgba(14, 165, 233, 0.2);
            color: var(--color-white);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding-top: 160px;
            padding-bottom: 100px;
            background-color: var(--color-primary);
            overflow: hidden;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 20% 20%, rgba(14, 165, 233, 0.18) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 75%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 50%, rgba(15, 23, 42, 0.6) 0%, transparent 80%);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 880px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: var(--radius-full);
            background: rgba(14, 165, 233, 0.15);
            border: 1px solid rgba(14, 165, 233, 0.35);
            font-size: 0.875rem;
            font-weight: 600;
            color: #7dd3fc;
            letter-spacing: 0.01em;
            margin-bottom: 28px;
            animation: fadeInUp 0.6s ease-out both;
        }

        .hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--color-accent);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.5); }
        }

        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -0.04em;
            color: var(--color-white);
            margin-bottom: 24px;
            animation: fadeInUp 0.6s ease-out 0.1s both;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, #38bdf8 0%, #34d399 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .hero-subtitle {
            font-size: 1.25rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.75);
            max-width: 680px;
            margin: 0 auto 40px;
            animation: fadeInUp 0.6s ease-out 0.2s both;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            animation: fadeInUp 0.6s ease-out 0.3s both;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 16px 32px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.01em;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 3px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-brand) 0%, #0284c7 100%);
            color: var(--color-white);
            box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
        }

        .btn-primary:hover {
            color: var(--color-white);
            transform: translateY(-3px);
            box-shadow: 0 16px 36px rgba(14, 165, 233, 0.45);
        }

        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(14, 165, 233, 0.35);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: var(--color-white);
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(8px);
        }

        .btn-secondary:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.18);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-3px);
        }

        .btn-secondary:active {
            transform: translateY(-1px);
        }

        .hero-stats {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 48px;
            flex-wrap: wrap;
            margin-top: 64px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            animation: fadeInUp 0.6s ease-out 0.45s both;
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat-number {
            font-size: 2.25rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: var(--color-white);
            line-height: 1.2;
        }

        .hero-stat-number .unit {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-brand);
            margin-left: 2px;
        }

        .hero-stat-label {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== Section base ===== */
        .section {
            padding: var(--spacing-xl) 0;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto var(--spacing-lg);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            background-color: rgba(14, 165, 233, 0.08);
            color: var(--color-brand);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            letter-spacing: -0.03em;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin: 0 auto;
        }

        /* ===== Features section ===== */
        .features-section {
            background-color: var(--color-bg);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-brand) 0%, var(--color-accent) 100%);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(14, 165, 233, 0.3);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
            font-size: 1.5rem;
            margin-bottom: 20px;
            flex-shrink: 0;
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--color-text);
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        .feature-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 18px;
        }

        .feature-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            background-color: var(--color-bg-muted);
            color: var(--color-text-secondary);
            font-size: 0.78rem;
            font-weight: 500;
        }

        /* ===== Workflow section ===== */
        .workflow-section {
            background-color: var(--color-bg-soft);
        }

        .workflow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
            position: relative;
        }

        .workflow-step {
            text-align: center;
            padding: 32px 20px;
            background-color: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            position: relative;
            transition: all var(--transition-base);
        }

        .workflow-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(14, 165, 233, 0.25);
        }

        .workflow-step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-accent) 100%);
            color: var(--color-white);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .workflow-step h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .workflow-step p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
        }

        /* ===== Content list section ===== */
        .content-section {
            background-color: var(--color-bg);
        }

        .content-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .content-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(14, 165, 233, 0.25);
        }

        .content-card-media {
            position: relative;
            padding-top: 56.25%;
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            overflow: hidden;
        }

        .content-card-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(14, 165, 233, 0.25) 0%, transparent 60%);
        }

        .content-card-media-icon {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 2.5rem;
            z-index: 2;
            opacity: 0.6;
        }

        .content-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .content-card-category {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--color-brand);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 10px;
        }

        .content-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.45;
            color: var(--color-text);
            margin-bottom: 10px;
            transition: color var(--transition-fast);
        }

        .content-card:hover .content-card-title {
            color: var(--color-brand);
        }

        .content-card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .content-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--color-border-light);
        }

        .content-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== Social proof section ===== */
        .proof-section {
            background-color: var(--color-bg-soft);
        }

        .proof-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .proof-card {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all var(--transition-base);
        }

        .proof-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(14, 165, 233, 0.2);
        }

        .proof-quote {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
            position: relative;
            padding-left: 20px;
            border-left: 3px solid var(--color-brand);
        }

        .proof-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .proof-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-white);
            font-weight: 600;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .proof-author-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text);
        }

        .proof-author-info span {
            font-size: 0.82rem;
            color: var(--color-text-muted);
        }

        /* ===== FAQ section ===== */
        .faq-section {
            background-color: var(--color-bg);
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background-color: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(14, 165, 233, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-item[open] {
            border-color: rgba(14, 165, 233, 0.4);
            box-shadow: var(--shadow-md);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            list-style: none;
            transition: background-color var(--transition-fast);
            gap: 16px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--color-bg-muted);
            color: var(--color-text-secondary);
            font-size: 1.2rem;
            font-weight: 500;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }

        .faq-item[open] summary::after {
            content: '−';
            background-color: var(--color-brand);
            color: var(--color-white);
            transform: rotate(180deg);
        }

        .faq-item summary:hover {
            background-color: var(--color-bg-soft);
        }

        .faq-item summary:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
        }

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.75;
        }

        /* ===== CTA section ===== */
        .cta-section {
            background-color: var(--color-primary);
            position: relative;
            overflow: hidden;
            padding: var(--spacing-xl) 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 30% 50%, rgba(14, 165, 233, 0.2) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 50%, rgba(16, 185, 129, 0.15) 0%, transparent 50%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .cta-content h2 {
            font-size: 2.5rem;
            font-weight: 800;
            letter-spacing: -0.04em;
            line-height: 1.25;
            color: var(--color-white);
            margin-bottom: 18px;
        }

        .cta-content p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.75;
            margin-bottom: 36px;
        }

        .cta-content .btn {
            font-size: 1.05rem;
            padding: 18px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background-color: #0a0f1a;
            color: rgba(255, 255, 255, 0.7);
            padding: var(--spacing-lg) 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
        }

        .footer-col ul a:hover {
            color: var(--color-brand);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .workflow-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .proof-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-title {
                font-size: 2.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .hero {
                padding-top: 120px;
                padding-bottom: 70px;
                min-height: auto;
            }
            .hero-title {
                font-size: 2.25rem;
            }
            .hero-subtitle {
                font-size: 1.05rem;
            }
            .hero-stats {
                gap: 28px;
                margin-top: 44px;
                padding-top: 28px;
            }
            .hero-stat-number {
                font-size: 1.75rem;
            }
            .section {
                padding: var(--spacing-lg) 0;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .workflow-steps {
                grid-template-columns: 1fr;
            }
            .content-list {
                grid-template-columns: 1fr;
            }
            .proof-grid {
                grid-template-columns: 1fr;
            }
            .cta-content h2 {
                font-size: 1.9rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .btn {
                padding: 14px 24px;
                font-size: 0.925rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
                max-width: 340px;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.85rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-badge {
                font-size: 0.78rem;
                padding: 6px 14px;
            }
            .hero-stats {
                flex-direction: column;
                gap: 20px;
            }
            .hero-stat-number {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .faq-item summary {
                padding: 16px 18px;
                font-size: 0.925rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.875rem;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .cta-content p {
                font-size: 1rem;
            }
            .site-header .container {
                height: 60px;
            }
            .logo {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.875rem;
                border-radius: var(--radius-sm);
            }
            .mobile-nav {
                top: 60px;
            }
        }