/* ===== Reset & Base ===== */
        *, *::before, *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            color: #1a1a2e;
            background: #fafafa;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #e8600a;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover { color: #c44d00; }
        img { max-width: 100%; height: auto; }

        /* ===== Utility ===== */
        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #1a1a2e;
        }
        .section-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: #666;
            max-width: 640px;
            margin: 0 auto 48px;
        }
        .badge {
            display: inline-block;
            background: linear-gradient(135deg, #ff7a18, #e8600a);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }

        /* ===== Navbar ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(232,96,10,0.1);
            transition: box-shadow 0.3s;
        }
        .navbar.scrolled {
            box-shadow: 0 2px 20px rgba(232,96,10,0.08);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #e8600a;
        }
        .navbar-brand .logo-icon {
            font-size: 1.6rem;
        }
        .navbar-brand .logo-img {
            height: 40px;
            width: auto;
        }
        .navbar-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .navbar-links a {
            color: #444;
            font-size: 0.95rem;
            font-weight: 500;
            position: relative;
        }
        .navbar-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: #e8600a;
            transition: width 0.3s;
        }
        .navbar-links a:hover { color: #e8600a; }
        .navbar-links a:hover::after { width: 100%; }
        .navbar-cta {
            background: linear-gradient(135deg, #ff7a18, #e8600a);
            color: #fff !important;
            padding: 8px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .navbar-cta:hover { color: #fff !important; opacity: 0.9; }
        .navbar-cta::after { display: none !important; }

        /* Mobile menu */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: #333;
            margin: 5px 0;
            transition: 0.3s;
            border-radius: 2px;
        }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px;
            text-align: center;
            background: linear-gradient(180deg, #fff5ec 0%, #fafafa 100%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 140%;
            height: 200%;
            background: radial-gradient(ellipse at 30% 50%, rgba(255,122,24,0.06) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-badge {
            margin-bottom: 24px;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: #1a1a2e;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, #ff7a18, #e8600a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: #555;
            max-width: 600px;
            margin: 0 auto 36px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #ff7a18, #e8600a);
            color: #fff;
            padding: 14px 32px;
            border-radius: 12px;
            font-size: 1.05rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            box-shadow: 0 4px 16px rgba(232,96,10,0.3);
        }
        .btn-icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(232,96,10,0.4);
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: #e8600a;
            padding: 14px 32px;
            border-radius: 12px;
            font-size: 1.05rem;
            font-weight: 600;
            border: 2px solid rgba(232,96,10,0.2);
            cursor: pointer;
            transition: 0.2s;
        }
        .btn-secondary:hover {
            border-color: #e8600a;
            background: #fff5ec;
            color: #e8600a;
        }
        /* ===== Features ===== */
        .features {
            padding: 80px 0;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: #fff;
            border-radius: 16px;
            padding: 32px 28px;
            border: 1px solid #f0f0f0;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(232,96,10,0.08);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, #fff0e0, #ffe0c0);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #1a1a2e;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: #666;
            line-height: 1.6;
        }

        /* ===== Channels ===== */
        .channels {
            padding: 80px 0;
            background: #fff5ec;
        }
        .channels-wrap {
            text-align: center;
        }
        .channel-icons {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 40px;
        }
        .channel-item {
            background: #fff;
            border-radius: 14px;
            padding: 20px 28px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
            transition: transform 0.2s;
            min-width: 100px;
        }
        .channel-item:hover { transform: translateY(-3px); }
        .channel-item .ch-icon { font-size: 1.8rem; }
        .channel-item .ch-name { font-size: 0.85rem; color: #555; font-weight: 500; }

        /* ===== How It Works ===== */
        .how-it-works {
            padding: 80px 0;
        }
        .steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 48px;
        }
        .step {
            text-align: center;
            position: relative;
        }
        .step-num {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, #ff7a18, #e8600a);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 4px 16px rgba(232,96,10,0.3);
        }
        .step h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step p {
            font-size: 0.95rem;
            color: #666;
        }

        /* ===== Architecture ===== */
        /* ===== Install Sections ===== */
        .install-sections {
            padding: 80px 0;
            background: linear-gradient(180deg, #fff5ec, #fafafa);
        }
        .install-card {
            background: #fff;
            border-radius: 20px;
            padding: 36px;
            margin-bottom: 32px;
            border: 2px solid rgba(232,96,10,0.08);
            box-shadow: 0 4px 16px rgba(0,0,0,0.03);
        }
        .install-card:hover {
            box-shadow: 0 8px 32px rgba(232,96,10,0.08);
        }
        .install-header {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 28px;
        }
        .install-icon {
            font-size: 2.2rem;
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, #fff0e0, #ffe0c0);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .install-icon-svg {
            width: 28px;
            height: 28px;
            color: #e8600a;
        }
        .install-header h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #1a1a2e;
            margin-bottom: 2px;
        }
        .install-header p {
            font-size: 0.9rem;
            color: #888;
        }
        .install-steps {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .install-step {
            display: flex;
            gap: 16px;
        }
        .step-badge {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, #ff7a18, #e8600a);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .install-step h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #1a1a2e;
            margin-bottom: 6px;
        }
        .install-step p {
            font-size: 0.9rem;
            color: #666;
            line-height: 1.6;
        }
        .install-step p code {
            background: #f5f5f5;
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.85rem;
            color: #e8600a;
        }
        .install-code {
            background: #1a1a2e;
            color: #e0e0e0;
            padding: 12px 16px;
            border-radius: 8px;
            font-family: "SF Mono", "Fira Code", "Consolas", monospace;
            font-size: 0.85rem;
            line-height: 1.8;
        }
        .install-code .prompt { color: #ff7a18; }

        /* ===== Architecture ===== */
        .architecture {
            padding: 80px 0;
            background: #1a1a2e;
            color: #e0e0e0;
        }
        .architecture .section-title { color: #fff; }
        .architecture .section-subtitle { color: #aaa; }
        .arch-diagram {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 16px;
            padding: 32px;
            font-family: "SF Mono", "Fira Code", "Consolas", monospace;
            font-size: 0.85rem;
            line-height: 1.8;
            color: #ccc;
            max-width: 700px;
            margin: 0 auto;
            overflow-x: auto;
        }
        .arch-diagram .orange { color: #ff7a18; }
        .arch-diagram .white { color: #fff; }
        .arch-diagram .dim { color: #777; }

        /* ===== Skills ===== */
        .skills {
            padding: 80px 0;
            background: linear-gradient(180deg, #fafafa, #fff5ec);
        }
        .skills-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            flex-wrap: wrap;
            margin-top: 48px;
            margin-bottom: 48px;
        }
        .stat-item {
            text-align: center;
        }
        .stat-num {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #ff7a18, #e8600a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-label {
            font-size: 1rem;
            color: #666;
            margin-top: 4px;
        }
        .skills-tags {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .skill-tag {
            background: #fff;
            border: 1px solid rgba(232,96,10,0.15);
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            color: #555;
            transition: 0.2s;
        }
        .skill-tag:hover {
            border-color: #e8600a;
            color: #e8600a;
            background: #fff5ec;
        }

        /* ===== Quick Start ===== */
        .quick-start {
            padding: 80px 0;
        }
        .code-block {
            background: #1a1a2e;
            color: #e0e0e0;
            border-radius: 16px;
            padding: 32px;
            max-width: 700px;
            margin: 0 auto;
            font-family: "SF Mono", "Fira Code", "Consolas", monospace;
            font-size: 0.9rem;
            line-height: 2;
            overflow-x: auto;
        }
        .code-block .comment { color: #888; }
        .code-block .cmd-line { color: #fff; }
        .code-block .prompt { color: #ff7a18; }
        .code-block .output { color: #4ade80; }

        /* ===== FAQ ===== */
        .faq {
            padding: 80px 0;
            background: #fff5ec;
        }
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: 12px;
            margin-bottom: 12px;
            border: 1px solid #f0f0f0;
            overflow: hidden;
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: #1a1a2e;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: background 0.2s;
        }
        .faq-question:hover { background: #fafafa; }
        .faq-question .arrow {
            font-size: 1.2rem;
            color: #e8600a;
            transition: transform 0.3s;
        }
        .faq-item.open .faq-question .arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: #666;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        /* ===== CTA ===== */
        .cta {
            padding: 80px 0;
            text-align: center;
            background: linear-gradient(135deg, #ff7a18, #e8600a);
            color: #fff;
        }
        .cta h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        .cta .cta-logo {
            height: 56px;
            width: auto;
        }
        .cta p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 500px;
            margin: 0 auto 32px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: #e8600a;
            padding: 16px 36px;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
        }
        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
            color: #e8600a;
        }

        .install-steps {
            grid-template-columns: 1fr;
        }
        .install-card {
            padding: 24px;
        }

        /* ===== Footer ===== */
        .footer {
            padding: 40px 0;
            text-align: center;
            background: #1a1a2e;
            color: #888;
            font-size: 0.9rem;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ff7a18;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .footer-brand .footer-logo {
            height: 36px;
            width: auto;
        }
        .footer a { color: #aaa; }
        .footer a:hover { color: #ff7a18; }
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 24px;
            margin: 16px 0;
            flex-wrap: wrap;
        }

        /* ===== Responsive ===== */
        @media (max-width: 900px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .hero-actions {
                flex-direction: column;
            }
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .section-title { font-size: 1.6rem; }
            .section-subtitle { font-size: 0.95rem; }
            .navbar-links { display: none; }
            .menu-toggle { display: block; }
            .navbar-links.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                width: 100%;
                background: #fff;
                padding: 20px 24px;
                box-shadow: 0 8px 24px rgba(0,0,0,0.08);
                gap: 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .skills-stats {
                gap: 32px;
            }
            .stat-num { font-size: 2.2rem; }
            .cta h2 { font-size: 1.8rem; }
            .code-block { font-size: 0.8rem; padding: 20px; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.8rem; }
            .hero-actions { flex-direction: column; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
            .channel-icons { gap: 12px; }
            .channel-item { padding: 14px 18px; min-width: 80px; }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-1 { animation-delay: 0.1s; opacity: 0; }
        .delay-2 { animation-delay: 0.2s; opacity: 0; }
        .delay-3 { animation-delay: 0.3s; opacity: 0; }
        .delay-4 { animation-delay: 0.4s; opacity: 0; }