/* CSS Reset & Base Styles */
        :root {
            --color-text-main: #111111;
            --color-text-light: #ffffff;
            --color-text-muted: #666666;
            --color-bg-body: #f5f5f5;
            --color-bg-white: #ffffff;
            --color-bg-footer: #1c1c1c;
            --color-accent: #0052d9; /* Subtle blue for links */
            --transition-standard: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Open Sans', "PingFang SC", "Microsoft YaHei", sans-serif;
            -webkit-font-smoothing: antialiased;
        }

        html {
            overflow-x: hidden;
            scroll-padding-top: calc(64px + env(safe-area-inset-top, 0px));
        }

        body {
            background-color: var(--color-bg-body);
            color: var(--color-text-main);
            line-height: 1.5;
            overflow-x: visible;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        ul {
            list-style: none;
        }

        /* Navbar - DJI Style (Transparent to White on scroll) */
        header,
        #main-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            width: 100%;
            min-height: 64px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: env(safe-area-inset-top, 0px) 40px 0;
            height: calc(64px + env(safe-area-inset-top, 0px));
            min-height: calc(64px + env(safe-area-inset-top, 0px));
            box-sizing: border-box;
            z-index: 10002;
            overflow: visible;
            color: var(--color-text-light);
            transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            will-change: transform;
            -webkit-transform: translateZ(0);
            transform: translateZ(0);
        }

        header.scrolled,
        #main-header.scrolled {
            background-color: var(--color-bg-white);
            color: var(--color-text-main);
            border-bottom: 1px solid #e0e0e0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        header.scrolled .logo,
        header.scrolled .nav-menu-toggle,
        header.scrolled .nav-icon-btn,
        #main-header.scrolled .logo,
        #main-header.scrolled .nav-menu-toggle,
        #main-header.scrolled .nav-icon-btn {
            color: var(--color-text-main);
        }

        header.scrolled .lang-switch,
        #main-header.scrolled .lang-switch {
            color: var(--color-text-main);
            border-left-color: #ccc;
        }

        .nav-left {
            display: flex;
            align-items: center;
            gap: 40px;
        }

        .logo {
            font-size: 22px;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .nav-links {
            display: flex;
            gap: 28px;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 400;
            transition: color 0.3s;
        }

        .nav-links a:hover {
            opacity: 0.7;
        }

        .nav-links a.active {
            font-weight: 600;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .nav-icon-btn {
            font-size: 16px;
            cursor: pointer;
            background: none;
            border: none;
            color: inherit;
            padding: 8px;
            line-height: 1;
        }

        .nav-menu-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            padding: 0;
            border: none;
            background: transparent;
            color: inherit;
            font-size: 20px;
            cursor: pointer;
            border-radius: 8px;
            transition: background 0.2s ease;
        }

        .nav-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        header.scrolled .nav-menu-toggle:hover {
            background: rgba(0, 0, 0, 0.06);
        }

        .mobile-nav-backdrop {
            position: fixed;
            inset: 0;
            z-index: 10003;
            background: rgba(0, 0, 0, 0.45);
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity 0.25s ease, visibility 0.25s ease;
        }

        .mobile-nav-backdrop.active {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        .mobile-nav-panel {
            position: fixed;
            top: 0;
            right: 0;
            z-index: 10004;
            pointer-events: none;
            width: min(320px, 88vw);
            height: 100%;
            background: #fff;
            color: var(--color-text-main);
            box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
            transform: translateX(100%);
            transition: transform 0.28s cubic-bezier(0.25, 0.8, 0.25, 1);
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        .mobile-nav-panel.active {
            transform: translateX(0);
            pointer-events: auto;
        }

        .mobile-nav-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            padding: 0 20px;
            border-bottom: 1px solid #eee;
            flex-shrink: 0;
        }

        .mobile-nav-title {
            font-size: 15px;
            font-weight: 600;
        }

        .mobile-nav-close {
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            font-size: 18px;
            color: #666;
            cursor: pointer;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .mobile-nav-close:hover {
            background: #f5f5f5;
        }

        .mobile-nav-links {
            display: flex;
            flex-direction: column;
            padding: 12px 0;
            flex: 1;
            overflow-y: auto;
        }

        .mobile-nav-links a {
            display: block;
            padding: 14px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--color-text-main);
            border-bottom: 1px solid #f5f5f5;
            transition: background 0.15s ease, color 0.15s ease;
        }

        .mobile-nav-links a:hover,
        .mobile-nav-links a.active {
            background: #f7f8ff;
            color: var(--color-accent);
        }

        .mobile-nav-footer {
            padding: 16px 20px calc(20px + env(safe-area-inset-bottom, 0px));
            border-top: 1px solid #eee;
            display: flex;
            flex-direction: column;
            gap: 16px;
            flex-shrink: 0;
            background: #fafafa;
        }

        .mobile-lang-section {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .mobile-lang-heading {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.4px;
            color: #888;
            text-transform: uppercase;
        }

        .mobile-lang-heading i {
            font-size: 13px;
            color: #aaa;
        }

        .mobile-lang-options {
            display: flex;
            flex-direction: column;
            gap: 4px;
            background: #fff;
            border: 1px solid #ebebeb;
            border-radius: 12px;
            padding: 4px;
            overflow: hidden;
        }

        .mobile-lang-option {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 11px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-main);
            border-radius: 8px;
            transition: background 0.15s ease, color 0.15s ease;
        }

        .mobile-lang-option:hover {
            background: #f5f6fa;
        }

        .mobile-lang-option.is-active {
            background: #f0f4ff;
            color: var(--color-accent);
            font-weight: 600;
        }

        .mobile-lang-option-label {
            min-width: 0;
        }

        .mobile-lang-option-check {
            font-size: 12px;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .mobile-nav-footer .btn-store {
            text-align: center;
            padding: 13px 16px;
            border-radius: 24px;
            font-size: 15px;
        }

        body.mobile-nav-open {
            overflow: hidden;
        }

        .lang-switch {
            position: relative;
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            cursor: pointer;
            border-left: 1px solid rgba(255,255,255,0.3);
            padding-left: 20px;
            user-select: none;
        }

        header.scrolled .lang-switch {
            border-left: 1px solid #ccc;
        }

        .lang-chevron {
            font-size: 10px;
            opacity: 0.7;
            transition: transform 0.2s ease;
        }

        .lang-switch.open .lang-chevron {
            transform: rotate(180deg);
        }

        .lang-dropdown {
            position: absolute;
            top: calc(100% + 12px);
            right: 0;
            min-width: 148px;
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            padding: 6px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-8px);
            transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
            z-index: 10001;
        }

        .lang-switch.open .lang-dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .lang-option {
            display: block;
            padding: 10px 18px;
            font-size: 14px;
            color: #333;
            transition: background 0.15s ease;
            white-space: nowrap;
        }

        .lang-option:hover {
            background: #f5f5f5;
        }

        .lang-option.active {
            color: #007aff;
            font-weight: 600;
        }

        .btn-store {
            background-color: #007aff;
            color: white;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
        }

        /* Hero Section */
        .hero {
            position: relative;
            height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: var(--color-text-light);
            overflow: hidden;
            background-color: #000;
        }

        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center center;
            opacity: 0.85;
            animation: slowZoom 30s infinite alternate;
        }

        @keyframes slowZoom {
            0% { transform: scale(1); }
            100% { transform: scale(1.05); }
        }

        .hero-content {
            position: relative;
            z-index: 10;
            margin-top: 40px;
            width: 100%;
            max-width: 960px;
            padding: 0 40px;
            box-sizing: border-box;
        }

        .hero-subtitle {
            font-size: 16px;
            font-weight: 300;
            margin-bottom: 10px;
            letter-spacing: 1px;
            line-height: 1.5;
            overflow-wrap: break-word;
            word-break: break-word;
        }

        .hero-title {
            font-size: 64px;
            font-weight: 600;
            letter-spacing: 2px;
            line-height: 1.15;
            margin-bottom: 15px;
            overflow-wrap: break-word;
            word-break: break-word;
        }

        .hero-desc {
            font-size: 20px;
            font-weight: 400;
            margin-bottom: 30px;
            line-height: 1.65;
            overflow-wrap: break-word;
            word-break: break-word;
        }

        .hero-platforms {
            display: flex;
            gap: 10px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .hero-platform-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.55);
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            color: var(--color-text-light);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.3px;
            transition: var(--transition-standard);
        }

        .hero-platform-tag:hover {
            background: rgba(255, 255, 255, 0.28);
            border-color: rgba(255, 255, 255, 0.9);
            transform: translateY(-2px);
        }

        .hero-platform-tag i {
            font-size: 14px;
        }

        .hero-actions {
            display: flex;
            gap: 15px;
            justify-content: center;
        }

        .hero-btn {
            padding: 10px 24px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-standard);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .btn-outline {
            border: 1px solid var(--color-text-light);
            background: transparent;
            color: var(--color-text-light);
        }

        .btn-outline:hover {
            background: var(--color-text-light);
            color: var(--color-text-main);
        }

        .btn-solid {
            border: 1px solid var(--color-text-light);
            background: var(--color-text-light);
            color: var(--color-text-main);
        }

        .btn-solid:hover {
            background: transparent;
            color: var(--color-text-light);
        }

        /* Section Global Styles */
        .section-header {
            text-align: center;
            padding: 80px 24px 50px;
            background-color: var(--color-bg-white);
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 600;
            color: var(--color-text-main);
            margin-bottom: 10px;
        }

        .section-header p {
            font-size: 14px;
            color: var(--color-text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.65;
            overflow-wrap: break-word;
            word-break: break-word;
        }

        /* Features (DJI "Explore Products" Style) */
        .features-wrapper {
            background-color: var(--color-bg-white);
            padding: 0 40px 80px;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .feature-card {
            position: relative;
            height: 600px;
            overflow: hidden;
            background-color: #ececec;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            color: var(--color-text-light);
            cursor: pointer;
            border-radius: 4px;
        }

        .feature-card img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .feature-card:hover img {
            transform: scale(1.03);
        }

        .feature-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 50%;
            background: linear-gradient(to bottom, rgba(0,0,0,0.6) 0%, transparent 100%);
            z-index: 1;
        }

        .feature-content {
            position: relative;
            z-index: 2;
            padding-top: 50px;
            width: 80%;
        }

        .feature-content h3 {
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .feature-content p {
            font-size: 14px;
            opacity: 0.9;
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .link-learn-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-light);
        }
        
        .link-learn-more i {
            font-size: 12px;
            margin-left: 4px;
        }

        /* Platforms (DJI "Select Handheld Gear" Style) */
        .platforms-wrapper {
            background-color: var(--color-bg-body);
            padding: 0 40px 80px;
        }

        .platforms-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .platform-card {
            position: relative;
            display: block;
            aspect-ratio: 4 / 5;
            height: auto;
            min-height: 200px;
            background-color: #000;
            overflow: hidden;
            cursor: pointer;
            border-radius: 4px;
        }

        .platform-card img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.8;
            transition: opacity 0.4s, transform 0.6s;
        }

        .platform-card:hover img {
            opacity: 1;
            transform: scale(1.02);
        }

        .platform-info {
            position: absolute;
            bottom: 25px;
            left: 25px;
            right: 25px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            z-index: 2;
            color: var(--color-text-light);
        }

        .platform-info h4 {
            font-size: 20px;
            font-weight: 600;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
            margin: 0;
            min-width: 0;
        }

        .platform-icon-btn {
            width: 32px;
            height: 32px;
            background-color: var(--color-bg-white);
            color: var(--color-text-main);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 12px;
            flex-shrink: 0;
            transition: var(--transition-standard);
        }

        .platform-card:hover .platform-icon-btn {
            transform: translateX(5px);
            background-color: #007aff;
            color: white;
        }

        /* Explore More / Trust Section */
        .explore-wrapper {
            background-color: var(--color-bg-body);
            padding: 0 40px 80px;
        }

        .explore-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .explore-card {
            background-color: var(--color-bg-white);
            display: flex;
            flex-direction: column;
            transition: box-shadow 0.3s;
            border-radius: 4px;
            overflow: hidden;
        }

        .explore-img-box {
            height: 300px;
            overflow: hidden;
            background-color: #e0e0e0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .explore-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .explore-text {
            padding: 40px;
            text-align: center;
        }

        .explore-text h4 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .explore-text p {
            color: var(--color-text-muted);
            font-size: 14px;
            margin-bottom: 20px;
        }

        .explore-text .link-blue {
            color: var(--color-accent);
            font-size: 14px;
            font-weight: 600;
        }
        
        .explore-text .link-blue i { margin-left: 4px; font-size: 12px; }

        /* Footer - Full dark multi-column */
        footer {
            background-color: var(--color-bg-footer);
            color: #b0b0b0;
            padding: 60px 40px 30px;
            font-size: 12px;
        }

        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 30px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 40px;
        }

        .footer-col h5 {
            color: var(--color-text-light);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col a {
            transition: color 0.2s;
        }

        .footer-col a:hover {
            color: var(--color-text-light);
        }

        /* Footer highlight column (quick start CTA) */
        .footer-col.footer-highlight-col {
            grid-column: span 2;
        }

        .footer-highlight-col p {
            color: #b0b0b0;
            line-height: 1.6;
        }

        .footer-quick-actions {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 16px;
        }

        .footer-action-btn {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: 4px;
            border: 1px solid rgba(255,255,255,0.3);
            color: #e0e0e0;
            font-size: 13px;
            transition: background 0.2s, border-color 0.2s, color 0.2s;
        }

        .footer-action-btn:hover {
            background: rgba(255,255,255,0.08);
            border-color: rgba(255,255,255,0.5);
            color: white;
        }

        .footer-action-btn.footer-action-primary {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.4);
        }

        .footer-action-btn.footer-action-primary:hover {
            background: rgba(255,255,255,0.18);
        }

        .footer-action-btn i {
            width: 16px;
            text-align: center;
            opacity: 0.85;
        }

        /* Pre-footer App Download Section */
        .pre-footer-app {
            text-align: center;
            padding-bottom: 50px;
            margin-bottom: 50px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .pre-footer-app h4 {
            font-size: 16px;
            color: var(--color-text-light);
            margin-bottom: 10px;
        }

        .pre-footer-app p {
            font-size: 14px;
            color: #b0b0b0;
            margin-bottom: 20px;
        }

        .btn-dark-pill {
            display: inline-block;
            background-color: #3a3a3a;
            color: var(--color-text-light);
            padding: 10px 30px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            transition: background-color 0.3s;
        }

        .btn-dark-pill:hover {
            background-color: #4a4a4a;
        }

        .footer-bottom {
            max-width: 1400px;
            margin: 24px auto 0;
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-light);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .footer-legal {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px 20px;
            margin-left: auto;
        }

        .footer-copyright {
            color: #666;
            font-size: 12px;
            line-height: 1.5;
        }

        .footer-legal-links {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-legal-links a {
            color: #999;
            font-size: 12px;
            transition: color 0.2s;
        }

        .footer-legal-links a:hover {
            color: var(--color-text-light);
        }

        .footer-legal-dot {
            color: #555;
            font-size: 12px;
            user-select: none;
        }

        /* Utility for highlighting GitHub repo in footer */
        .github-highlight {
            display: inline-block;
            margin-top: 15px;
            border: 1px solid rgba(255,255,255,0.3);
            padding: 8px 15px;
            border-radius: 4px;
        }

        /* ========================================
           Stats Banner
           ======================================== */
        .stats-banner {
            background: #0a0a0a;
            padding: 72px 40px;
        }

        .stats-inner {
            display: flex;
            justify-content: center;
            align-items: center;
            max-width: 1000px;
            margin: 0 auto;
        }

        .stat-item {
            flex: 1;
            text-align: center;
        }

        .stat-number {
            font-size: 54px;
            font-weight: 300;
            color: #fff;
            line-height: 1;
            letter-spacing: -1px;
            margin-bottom: 12px;
        }

        .stat-unit {
            font-size: 36px;
            font-weight: 300;
        }

        .stat-label {
            font-size: 12px;
            color: #555;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .stat-divider {
            width: 1px;
            height: 64px;
            background: #222;
            flex-shrink: 0;
            margin: 0 10px;
        }

        /* ========================================
           Protocol Support Section
           ======================================== */
        .protocol-section {
            background: #111;
            padding: 100px 40px;
        }

        .protocol-inner {
            max-width: 1300px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 38% 62%;
            gap: 80px;
            align-items: center;
        }

        .protocol-left {
            color: #fff;
        }

        .protocol-label {
            font-size: 11px;
            letter-spacing: 3px;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: 20px;
        }

        .protocol-heading {
            font-size: 46px;
            font-weight: 600;
            line-height: 1.2;
            margin-bottom: 22px;
        }

        .protocol-desc {
            font-size: 14px;
            color: #888;
            line-height: 1.9;
            margin-bottom: 32px;
        }

        .protocol-link {
            color: var(--color-accent);
            font-size: 14px;
            font-weight: 600;
            transition: opacity 0.2s;
        }

        .protocol-link:hover {
            opacity: 0.75;
        }

        .protocol-right {
            display: flex;
            flex-direction: column;
            gap: 34px;
        }

        .protocol-cat-title {
            font-size: 10px;
            letter-spacing: 2.5px;
            color: #444;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .protocol-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 9px;
        }

        .ptag {
            padding: 5px 13px;
            border: 1px solid #2c2c2c;
            color: #aaa;
            font-size: 12px;
            font-family: 'Courier New', monospace;
            border-radius: 3px;
            background: #1a1a1a;
            transition: border-color 0.2s, color 0.2s;
        }

        .ptag:hover {
            border-color: #555;
            color: #fff;
        }

        .ptag-new {
            border-color: #162240;
            color: #6699ff;
            background: #0a1525;
        }

        .ptag-new:hover {
            border-color: var(--color-accent);
            color: #99bbff;
        }

        .ptag-transport {
            border-color: #222;
            color: #555;
        }

        .ptag-transport:hover {
            border-color: #444;
            color: #999;
        }

        /* ========================================
           How It Works Section
           ======================================== */
        .howitworks-section {
            background: var(--color-bg-white);
            padding: 100px 40px;
        }

        .hiw-header {
            text-align: center;
            max-width: 580px;
            margin: 0 auto 80px;
        }

        .hiw-label {
            font-size: 11px;
            letter-spacing: 3px;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .hiw-header h2 {
            font-size: 40px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .hiw-header p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        .hiw-steps {
            max-width: 860px;
            margin: 0 auto;
            position: relative;
        }

        /* Vertical connector line */
        .hiw-steps::before {
            content: '';
            position: absolute;
            left: 47px;
            top: 70px;
            bottom: 70px;
            width: 1px;
            background: linear-gradient(to bottom, transparent, #e8e8e8 15%, #e8e8e8 85%, transparent);
        }

        .hiw-step {
            display: flex;
            gap: 44px;
            align-items: flex-start;
            padding: 48px 0;
            border-bottom: 1px solid #f2f2f2;
            position: relative;
        }

        .hiw-step:last-child {
            border-bottom: none;
        }

        .hiw-step-num {
            font-size: 76px;
            font-weight: 700;
            color: #ebebeb;
            line-height: 1;
            min-width: 96px;
            text-align: center;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
            user-select: none;
        }

        .hiw-step-body {
            display: flex;
            gap: 28px;
            align-items: flex-start;
            flex: 1;
            padding-top: 8px;
        }

        .hiw-step-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-bg-body);
            border: 1px solid #e0e0e0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .hiw-step-text h3 {
            font-size: 21px;
            font-weight: 600;
            margin-bottom: 12px;
            margin-top: 4px;
        }

        .hiw-step-text p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.85;
        }

        .hiw-cta {
            text-align: center;
            margin-top: 64px;
        }

        .hiw-btn {
            display: inline-block;
            border: 1.5px solid #222;
            padding: 12px 34px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            transition: background 0.3s, color 0.3s;
            color: var(--color-text-main);
        }

        .hiw-btn:hover {
            background: var(--color-text-main);
            color: #fff;
        }

        /* ========================================
           FAQ Section
           ======================================== */
        .faq-section {
            background: var(--color-bg-body);
            padding: 100px 40px;
        }

        .faq-inner {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .faq-label {
            font-size: 11px;
            letter-spacing: 3px;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .faq-header h2 {
            font-size: 40px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .faq-header p {
            font-size: 14px;
            color: var(--color-text-muted);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
        }

        .faq-item {
            border-top: 1px solid #e0e0e0;
        }

        .faq-item:last-child {
            border-bottom: 1px solid #e0e0e0;
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 22px 0;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-main);
            font-family: inherit;
            transition: color 0.2s;
        }

        .faq-question:hover {
            color: var(--color-accent);
        }

        .faq-idx {
            font-size: 12px;
            color: #c0c0c0;
            font-weight: 400;
            min-width: 22px;
            flex-shrink: 0;
            letter-spacing: 1px;
        }

        .faq-question > span:nth-child(2) {
            flex: 1;
        }

        .faq-icon {
            font-size: 13px;
            color: #bbb;
            transition: transform 0.3s, color 0.2s;
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--color-accent);
        }

        .faq-item.open .faq-question {
            color: var(--color-accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 600px;
        }

        .faq-answer p {
            padding: 0 0 26px 40px;
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.95;
        }

        .faq-answer p a {
            color: var(--color-accent);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        /* ========================================
           Marquee Ticker
           ======================================== */
        .marquee-ticker {
            background: #0a0a0a;
            overflow: hidden;
            padding: 16px 0;
            border-top: 1px solid #1c1c1c;
        }

        .marquee-track {
            display: flex;
            align-items: center;
            white-space: nowrap;
            width: max-content;
            animation: marqueeScroll 36s linear infinite;
        }

        .marquee-ticker:hover .marquee-track {
            animation-play-state: paused;
        }

        .mq-item {
            font-size: 12px;
            font-weight: 600;
            color: #3a3a3a;
            letter-spacing: 2px;
            text-transform: uppercase;
            padding: 0 24px;
        }

        .mq-dot {
            color: #1e1e1e;
            font-size: 16px;
            line-height: 1;
        }

        @keyframes marqueeScroll {
            0%   { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* ========================================
           Config Showcase Section
           ======================================== */
        .config-section {
            background: #0d0d0d;
            padding: 100px 40px;
        }

        .config-inner {
            max-width: 1300px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 42% 58%;
            gap: 80px;
            align-items: center;
        }

        .config-text {
            color: #fff;
        }

        .config-label {
            font-size: 11px;
            letter-spacing: 3px;
            color: #27c93f;
            text-transform: uppercase;
            margin-bottom: 20px;
        }

        .config-heading {
            font-size: 44px;
            font-weight: 600;
            line-height: 1.2;
            margin-bottom: 22px;
        }

        .config-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.9;
            margin-bottom: 28px;
        }

        .config-features {
            display: flex;
            flex-direction: column;
            gap: 13px;
            margin-bottom: 36px;
        }

        .config-features li {
            font-size: 13px;
            color: #777;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.5;
        }

        .config-features li i {
            color: #27c93f;
            font-size: 11px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .config-btn {
            display: inline-block;
            border: 1px solid #2a2a2a;
            color: #bbb;
            padding: 11px 28px;
            font-size: 13px;
            font-weight: 600;
            border-radius: 3px;
            transition: border-color 0.25s, color 0.25s;
        }

        .config-btn:hover {
            border-color: #27c93f;
            color: #27c93f;
        }

        /* Editor widget */
        .config-editor {
            background: #141414;
            border: 1px solid #222;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 32px 80px rgba(0,0,0,0.55);
        }

        .editor-titlebar {
            background: #1c1c1c;
            padding: 11px 16px;
            display: flex;
            align-items: center;
            gap: 6px;
            border-bottom: 1px solid #262626;
        }

        .editor-dot {
            width: 11px;
            height: 11px;
            border-radius: 50%;
        }

        .dot-red    { background: #ff5f56; }
        .dot-yellow { background: #ffbd2e; }
        .dot-green  { background: #27c93f; }

        .editor-filename {
            font-size: 12px;
            color: #555;
            margin-left: 10px;
            font-family: 'Courier New', monospace;
        }

        .editor-body {
            padding: 26px 28px 30px;
            overflow-x: auto;
        }

        .editor-code {
            font-family: 'Courier New', Consolas, monospace;
            font-size: 12.5px;
            line-height: 1.9;
            white-space: pre;
        }

        /* YAML token colors (VS Code Dark+ inspired) */
        .y-comment     { color: #4a5568; }
        .y-key         { color: #9cdcfe; }
        .y-colon       { color: #666; }
        .y-num         { color: #b5cea8; }
        .y-bool        { color: #569cd6; }
        .y-str         { color: #ce9178; }
        .y-dash        { color: #666; }
        .y-rule-type   { color: #dcdcaa; }
        .y-comma       { color: #666; }
        .y-rule-val    { color: #4ec9b0; }
        .y-rule-action { color: #c586c0; }

        /* ========================================
           Use Cases Zigzag Section
           ======================================== */
        .usecases-section {
            background: var(--color-bg-white);
        }

        .usecases-header {
            text-align: center;
            padding: 100px 40px 56px;
        }

        .uc-label {
            font-size: 11px;
            letter-spacing: 3px;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .usecases-header h2 {
            font-size: 40px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .usecases-header p {
            font-size: 14px;
            color: var(--color-text-muted);
        }

        .usecases-list {
            display: flex;
            flex-direction: column;
        }

        .uc-row {
            display: grid;
            grid-template-columns: 55% 45%;
            min-height: 500px;
        }

        .uc-row-reverse {
            grid-template-columns: 45% 55%;
            direction: rtl;
        }

        .uc-row-reverse > * {
            direction: ltr;
        }

        .uc-image {
            overflow: hidden;
        }

        .uc-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.7s ease;
        }

        .uc-row:hover .uc-image img {
            transform: scale(1.04);
        }

        .uc-content {
            padding: 72px 64px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            background: var(--color-bg-body);
        }

        .uc-row-reverse .uc-content {
            background: var(--color-bg-white);
        }

        .uc-tag {
            font-size: 11px;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--color-accent);
            font-weight: 600;
            margin-bottom: 20px;
            display: inline-block;
            border: 1px solid rgba(0,82,217,0.2);
            padding: 4px 12px;
            border-radius: 2px;
            width: fit-content;
        }

        .uc-content h3 {
            font-size: 27px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 18px;
        }

        .uc-content p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin-bottom: 28px;
        }

        .uc-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text-main);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s;
        }

        .uc-link i {
            font-size: 12px;
            transition: transform 0.2s;
        }

        .uc-link:hover {
            color: var(--color-accent);
        }

        .uc-link:hover i {
            transform: translateX(3px);
        }

        /* ========================================
           Blog Preview Section
           ======================================== */
        .blogpreview-section {
            background: var(--color-bg-white);
            padding: 100px 40px;
        }

        .blogpreview-inner {
            max-width: 1300px;
            margin: 0 auto;
        }

        .blogpreview-header {
            display: flex;
            align-items: baseline;
            gap: 20px;
            margin-bottom: 40px;
            border-bottom: 1px solid #e8e8e8;
            padding-bottom: 20px;
        }

        .bp-label {
            font-size: 11px;
            letter-spacing: 3px;
            color: var(--color-accent);
            text-transform: uppercase;
            font-weight: 600;
            flex-shrink: 0;
        }

        .blogpreview-header h2 {
            font-size: 26px;
            font-weight: 600;
            flex: 1;
        }

        .bp-viewall {
            font-size: 13px;
            color: var(--color-accent);
            font-weight: 600;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: opacity 0.2s;
        }

        .bp-viewall:hover { opacity: 0.7; }

        .blogpreview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            border: 1px solid #ebebeb;
            border-radius: 4px;
            overflow: hidden;
        }

        .bp-featured {
            border-right: 1px solid #ebebeb;
            display: flex;
            flex-direction: column;
            cursor: pointer;
            transition: opacity 0.25s;
        }

        .bp-featured:hover { opacity: 0.88; }

        .bp-featured-img {
            position: relative;
            height: 260px;
            overflow: hidden;
            flex-shrink: 0;
        }

        .bp-featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.6s ease;
        }

        .bp-featured:hover .bp-featured-img img {
            transform: scale(1.04);
        }

        .bp-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--color-accent);
            color: #fff;
            font-size: 11px;
            padding: 3px 10px;
            border-radius: 2px;
            font-weight: 600;
            letter-spacing: 1px;
        }

        .bp-featured-text {
            padding: 32px;
            flex: 1;
        }

        .bp-meta {
            font-size: 12px;
            color: #bbb;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .bp-featured-text h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 13px;
            color: var(--color-text-main);
        }

        .bp-featured-text p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        /* Article list */
        .bp-list {
            display: flex;
            flex-direction: column;
        }

        .bp-list-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 22px 26px;
            border-bottom: 1px solid #f0f0f0;
            cursor: pointer;
            transition: background 0.18s;
            text-decoration: none;
        }

        .bp-list-item:last-child { border-bottom: none; }
        .bp-list-item:hover { background: #fafafa; }

        .bp-list-num {
            font-size: 20px;
            font-weight: 700;
            color: #ebebeb;
            min-width: 32px;
            flex-shrink: 0;
            line-height: 1;
        }

        .bp-list-text { flex: 1; min-width: 0; }

        .bp-list-cat {
            font-size: 10px;
            color: var(--color-accent);
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 5px;
        }

        .bp-list-text h4 {
            font-size: 13px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--color-text-main);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .bp-list-arrow {
            font-size: 12px;
            color: #ddd;
            flex-shrink: 0;
            transition: transform 0.2s, color 0.2s;
        }

        .bp-list-item:hover .bp-list-arrow {
            transform: translateX(3px);
            color: var(--color-accent);
        }

        /* ========================================
           Responsive design
           ======================================== */
        /* Responsive design */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .platforms-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
            .platform-card { aspect-ratio: 5 / 6; }
            .footer-content { grid-template-columns: repeat(3, 1fr); }
            .footer-col.footer-highlight-col { grid-column: span 3; }
            .protocol-inner { grid-template-columns: 1fr; gap: 50px; }
            .protocol-heading { font-size: 36px; }
            .config-inner { grid-template-columns: 1fr; gap: 50px; }
            .config-heading { font-size: 36px; }
            .blogpreview-grid { grid-template-columns: 1fr; }
            .bp-featured { border-right: none; border-bottom: 1px solid #ebebeb; }
            .uc-row, .uc-row-reverse { grid-template-columns: 1fr; direction: ltr; min-height: auto; }
            .uc-image { height: 340px; }
        }

        @media (max-width: 768px) {
            .nav-links, .nav-right > .lang-switch, .nav-right > .btn-store { display: none; }
            .nav-menu-toggle { display: flex; }
            header, #main-header { padding: env(safe-area-inset-top, 0px) 16px 0; }
            .nav-right { gap: 4px; }

            /* Hero */
            .hero-content { padding: 0 24px; margin-top: 24px; }
            .hero-subtitle { font-size: 13px; letter-spacing: 0.3px; }
            .hero-title { font-size: 36px; letter-spacing: 1px; }
            .hero-desc { font-size: 15px; margin-bottom: 24px; }
            .hero-platforms { gap: 8px; margin-bottom: 22px; }
            .hero-platform-tag { font-size: 12px; padding: 5px 12px; }
            .hero-actions {
                flex-direction: column;
                align-items: center;
                gap: 12px;
                width: 100%;
            }
            .hero-btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }

            .features-grid, .explore-grid { grid-template-columns: 1fr; }
            .platforms-wrapper { padding: 0 24px 70px; }
            .platforms-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .platform-card { aspect-ratio: 1 / 1; min-height: 0; }
            .platform-info { bottom: 16px; left: 16px; right: 16px; }
            .platform-info h4 { font-size: 17px; }
            .platform-icon-btn { width: 28px; height: 28px; font-size: 11px; flex-shrink: 0; }
            /* When card count is odd, span the last item full width to avoid a lone narrow strip */
            .platform-card:last-child:nth-child(odd) {
                grid-column: 1 / -1;
                aspect-ratio: 2.2 / 1;
            }
            .footer-content { grid-template-columns: 1fr 1fr; }
            .footer-col.footer-highlight-col { grid-column: span 2; }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }

            .footer-legal {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                margin-left: 0;
            }

            /* Stats */
            .stats-inner { flex-wrap: wrap; }
            .stat-item { flex: 0 0 calc(50% - 20px); padding: 16px 0; }
            .stat-divider { display: none; }
            .stat-number { font-size: 40px; }

            /* Config */
            .config-section { padding: 70px 24px; }
            .config-heading { font-size: 30px; }
            .editor-body { padding: 18px 16px; }
            .editor-code { font-size: 11px; }

            /* Protocol */
            .protocol-section { padding: 70px 24px; }
            .protocol-inner { gap: 40px; }
            .protocol-heading { font-size: 30px; }

            /* How It Works */
            .howitworks-section { padding: 70px 24px; }
            .hiw-header h2 { font-size: 30px; }
            .hiw-steps::before { display: none; }
            .hiw-step { flex-direction: column; gap: 16px; padding: 36px 0; }
            .hiw-step-num { font-size: 56px; min-width: auto; }
            .hiw-step-body { flex-direction: column; gap: 16px; }

            /* Section headers (features, downloads, etc.) */
            .section-header { padding: 70px 24px 40px; }
            .section-header h2 { font-size: 30px; }
            .features-wrapper { padding: 0 24px 70px; }

            /* Use Cases */
            .usecases-header { padding: 70px 24px 40px; }
            .usecases-header h2 { font-size: 30px; }
            .uc-image { height: 260px; }
            .uc-content { padding: 44px 24px; }
            .uc-content h3 { font-size: 22px; }

            /* FAQ */
            .faq-section { padding: 70px 24px; }
            .faq-header h2 { font-size: 30px; }
            .faq-question { font-size: 14px; gap: 12px; }
            .faq-answer p { padding-left: 34px; }

            /* Blog Preview */
            .blogpreview-section { padding: 70px 24px; }
            .blogpreview-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin-bottom: 28px;
                padding-bottom: 16px;
            }
            .blogpreview-header h2 {
                font-size: 22px;
                flex: none;
                width: 100%;
                line-height: 1.35;
            }
            .bp-viewall { align-self: flex-start; }
            .bp-list-text h4 { white-space: normal; }
        }

        @media (max-width: 480px) {
            .hero-content { padding: 0 20px; }
            .hero-subtitle { font-size: 12px; }
            .hero-title { font-size: 30px; letter-spacing: 0.5px; }
            .hero-desc { font-size: 14px; }

            .platforms-wrapper { padding: 0 20px 60px; }
            .platforms-grid { grid-template-columns: 1fr; gap: 10px; }
            .platform-card { aspect-ratio: 16 / 9; }
            .platform-card:last-child:nth-child(odd) { grid-column: auto; aspect-ratio: 16 / 9; }
            .platform-info { bottom: 14px; left: 18px; right: 18px; }
            .platform-info h4 { font-size: 18px; }
        }