:root {
        --bg-primary: #08090b;
        --bg-secondary: #0d0f14;
        --bg-tertiary: #14161c;
        --bg-card: rgba(255, 255, 255, 0.02);
        --border-color: rgba(255, 255, 255, 0.06);
        --border-hover: rgba(255, 255, 255, 0.12);
        --text-primary: #ffffff;
        --text-secondary: #8b8f98;
        --text-muted: #5a5f6b;
        --accent-cyan: #22d3ee;
        --accent-blue: #6366f1;
        --accent-orange: #fb923c;
        --radius-sm: 8px;
        --radius-md: 12px;
        --radius-lg: 16px;
        --radius-xl: 20px;
    }

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

    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
        background: var(--bg-primary);
        color: var(--text-primary);
        line-height: 1.6;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
        /* ====== 复制保护：禁止选中 ====== */
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
    }

    /* ====== 复制保护：选中文字不可见 ====== */
    ::selection { background: transparent; }
    ::-moz-selection { background: transparent; }

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

    /* ====== 入场动画 ====== */
    @keyframes fadeInUp {
        from { opacity: 0; transform: translateY(30px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes fadeInScale {
        from { opacity: 0; transform: scale(0.92); }
        to   { opacity: 1; transform: scale(1); }
    }
    @keyframes glowPulse {
        0%, 100% { opacity: 0.4; }
        50%      { opacity: 0.8; }
    }
    @keyframes float {
        0%, 100% { transform: translateY(0); }
        50%      { transform: translateY(-8px); }
    }
    @keyframes shimmer {
        0%   { background-position: -200% 0; }
        100% { background-position: 200% 0; }
    }

    section, .workflow-section, footer {
        animation: fadeInUp 0.7s ease-out both;
    }
    section:nth-child(2) { animation-delay: 0.1s; }
    section:nth-child(3) { animation-delay: 0.2s; }
    section:nth-child(4) { animation-delay: 0.3s; }
    section:nth-child(5) { animation-delay: 0.4s; }

    /* ====== NAV ====== */
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        height: 60px;
        padding: 0 40px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: rgba(8, 9, 11, 0.6);
        backdrop-filter: blur(20px) saturate(1.4);
        -webkit-backdrop-filter: blur(20px) saturate(1.4);
        border-bottom: 1px solid var(--border-color);
        transition: background 0.3s;
    }
    .nav:hover {
        background: rgba(8, 9, 11, 0.75);
    }

    .nav-logo {
        font-weight: 700;
        font-size: 18px;
        letter-spacing: 1px;
    }

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

    .nav-right a {
        font-size: 14px;
        color: var(--text-secondary);
        transition: color 0.2s;
    }

    .nav-right a:hover {
        color: var(--text-primary);
    }

    .nav-lang {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        color: var(--text-muted);
        cursor: pointer;
    }

    .nav-lang svg {
        width: 14px;
        height: 14px;
    }

    .btn-download-nav {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 16px;
        background: var(--accent-cyan);
        color: #000;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 13px;
        transition: all 0.2s;
    }

    .btn-download-nav:hover {
        background: #06b6d4;
    }

    /* ====== HERO ====== */
    .hero {
        min-height: 100vh;
        padding: 120px 40px 80px;
        display: flex;
        align-items: center;
        gap: 60px;
        max-width: 1400px;
        margin: 0 auto;
        position: relative;
    }

    .hero-left {
        flex: 1;
        min-width: 0;
    }

    .hero-left .tag {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 12px;
        font-weight: 600;
        letter-spacing: 2px;
        color: var(--accent-cyan);
        margin-bottom: 28px;
    }

    .hero-left .tag::before {
        content: '';
        width: 32px;
        height: 2px;
        background: var(--accent-cyan);
    }

    .hero-left h1 {
        font-size: clamp(44px, 7vw, 84px);
        font-weight: 800;
        line-height: 1.05;
        letter-spacing: -2px;
        margin-bottom: 20px;
    }

    .hero-left h1 .highlight {
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .hero-left .desc {
        font-size: 17px;
        color: var(--text-secondary);
        line-height: 1.7;
        max-width: 520px;
        margin-bottom: 40px;
    }

    .hero-actions {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }

    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 24px;
        background: var(--accent-cyan);
        color: #000;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 14px;
        border: none;
        cursor: pointer;
        transition: all 0.2s;
    }

    .btn-primary:hover {
        background: #06b6d4;
        transform: translateY(-1px);
        box-shadow: 0 6px 20px rgba(34, 211, 238, 0.25);
    }

    .btn-ghost {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 24px;
        background: transparent;
        color: var(--text-primary);
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 14px;
        border: 1px solid var(--border-color);
        cursor: pointer;
        transition: all 0.2s;
    }

    .btn-ghost:hover {
        border-color: var(--border-hover);
        background: var(--bg-tertiary);
    }

    .hero-right {
        flex: 0 0 420px;
        height: 540px;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .hero-right .illustration-box {
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(34, 211, 238, 0.05));
        border-radius: var(--radius-lg);
        border: 1px solid var(--border-color);
        overflow: hidden;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        position: relative;
        animation: float 5s ease-in-out infinite;
    }

    .hero-right .illustration-box::before {
        content: '';
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 50% 100%, rgba(34, 211, 238, 0.06) 0%, transparent 60%);
    }

    /* ====== Robot ====== */
    .robot-body {
        position: relative;
        z-index: 2;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .robot-head {
        width: 140px;
        height: 140px;
        background: radial-gradient(circle at 50% 40%, rgba(34, 211, 238, 0.15), rgba(99, 102, 241, 0.08));
        border-radius: 32px;
        border: 1px solid rgba(34, 211, 238, 0.15);
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        box-shadow: 0 0 40px rgba(34, 211, 238, 0.08), inset 0 0 30px rgba(34, 211, 238, 0.03);
    }
    .robot-head::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 80px;
        height: 80px;
        background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
        border-radius: 50%;
        opacity: 0.08;
        filter: blur(25px);
    }

    .antenna {
        position: absolute;
        top: -16px;
        left: 50%;
        transform: translateX(-50%);
        width: 4px;
        height: 14px;
        background: linear-gradient(to top, var(--accent-cyan), transparent);
        border-radius: 2px;
    }
    .antenna::after {
        content: '';
        position: absolute;
        top: -4px;
        left: 50%;
        transform: translateX(-50%);
        width: 8px;
        height: 8px;
        background: var(--accent-cyan);
        border-radius: 50%;
        box-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
        animation: glowPulse 2s ease-in-out infinite;
    }

    .visor {
        position: absolute;
        top: 20px;
        left: 50%;
        transform: translateX(-50%);
        width: 80px;
        height: 36px;
        background: rgba(34, 211, 238, 0.06);
        border: 1px solid rgba(34, 211, 238, 0.1);
        border-radius: 8px;
        overflow: hidden;
    }
    .visor-line {
        position: absolute;
        top: 50%;
        left: 10%;
        right: 10%;
        height: 1px;
        background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.3), transparent);
    }
    .visor-scan {
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.08), transparent);
        animation: scanMove 3s ease-in-out infinite;
    }
    @keyframes scanMove {
        0%   { left: -100%; }
        50%  { left: 100%; }
        100% { left: 100%; }
    }

    .robot-eyes {
        display: flex;
        gap: 24px;
        margin-top: 28px;
        position: relative;
        z-index: 2;
    }
    .robot-eye {
        width: 12px;
        height: 12px;
        background: var(--accent-cyan);
        border-radius: 50%;
        box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
        animation: blink 3s step-end infinite;
    }
    .robot-eye.left { animation-delay: 0s; }
    .robot-eye.right { animation-delay: 0s; }

    .robot-mouth {
        display: flex;
        gap: 2px;
        margin-top: 16px;
        font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
        font-size: 14px;
        color: var(--accent-cyan);
        position: relative;
        z-index: 2;
    }
    .mouth-char { opacity: 0.7; }
    .mouth-char.blink {
        animation: blink 1s step-end infinite;
    }

    /* ====== 浮动代码文字 ====== */
    .code-float {
        position: absolute;
        font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
        font-size: 11px;
        color: rgba(34, 211, 238, 0.2);
        pointer-events: none;
        animation: float 4s ease-in-out infinite;
        z-index: 1;
        white-space: nowrap;
    }
    .code-1 {
        top: 18%;
        right: 12%;
        animation-delay: 0s;
    }
    .code-2 {
        bottom: 25%;
        left: 10%;
        animation-delay: 1.5s;
    }
    .code-3 {
        top: 65%;
        right: 8%;
        animation-delay: 0.8s;
        font-size: 10px;
    }

    /* ====== 轨道环 ====== */
    .orbit-ring {
        position: absolute;
        width: 280px;
        height: 280px;
        border: 1px solid rgba(34, 211, 238, 0.06);
        border-radius: 50%;
        animation: spin 20s linear infinite;
        pointer-events: none;
    }
    .orbit-ring::before {
        content: '';
        position: absolute;
        top: -2px;
        left: 50%;
        width: 6px;
        height: 6px;
        background: rgba(34, 211, 238, 0.3);
        border-radius: 50%;
        box-shadow: 0 0 8px rgba(34, 211, 238, 0.2);
    }
    .orbit-ring.ring-2 {
        width: 220px;
        height: 220px;
        animation: spin 15s linear infinite reverse;
        border-color: rgba(99, 102, 241, 0.06);
    }
    .orbit-ring.ring-2::before {
        background: rgba(99, 102, 241, 0.3);
        box-shadow: 0 0 8px rgba(99, 102, 241, 0.2);
        top: 50%;
        left: auto;
        right: -2px;
    }

    @keyframes spin {
        from { transform: rotate(0deg); }
        to   { transform: rotate(360deg); }
    }

    /* ====== Pet ====== */
    .pet {
        position: absolute;
        bottom: 60px;
        z-index: 2;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .pet-body {
        width: 44px;
        height: 44px;
        background: radial-gradient(circle at 50% 40%, rgba(99, 102, 241, 0.2), rgba(99, 102, 241, 0.05));
        border: 1px solid rgba(99, 102, 241, 0.15);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        animation: float 3s ease-in-out infinite;
    }
    .pet-eye {
        width: 6px;
        height: 6px;
        background: var(--accent-blue);
        border-radius: 50%;
        box-shadow: 0 0 8px rgba(99, 102, 241, 0.4);
    }
    .pet-glow {
        position: absolute;
        width: 60px;
        height: 60px;
        background: radial-gradient(circle, rgba(99, 102, 241, 0.1), transparent);
        border-radius: 50%;
        filter: blur(8px);
        animation: glowPulse 3s ease-in-out infinite;
    }

    .hero-bg-glow {
        position: absolute;
        top: 10%;
        right: 0;
        width: 600px;
        height: 600px;
        background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 60%);
        filter: blur(80px);
        pointer-events: none;
        animation: glowPulse 4s ease-in-out infinite;
    }

    /* ====== MODE TABS ====== */
    .mode-tabs {
        display: flex;
        gap: 0;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        background: var(--bg-secondary);
        margin-top: 40px;
    }

    .mode-tab {
        display: block;
        padding: 10px 24px;
        font-size: 13px;
        font-weight: 500;
        color: var(--text-muted);
        background: transparent;
        border: none;
        border-right: 1px solid var(--border-color);
        transition: all 0.25s;
        position: relative;
    }
    .mode-tab:last-child {
        border-right: none;
    }
    .mode-tab.active {
        color: var(--text-primary);
        background: rgba(34, 211, 238, 0.08);
    }
    .mode-tab:hover:not(.active) {
        color: var(--text-secondary);
        background: rgba(255,255,255,0.02);
    }

    /* ====== SECTION ====== */
    .section {
        padding: 100px 40px;
    }

    .section-inner {
        max-width: 1200px;
        margin: 0 auto;
    }

    .section-label {
        font-size: 12px;
        font-weight: 600;
        letter-spacing: 2px;
        color: var(--accent-cyan);
        margin-bottom: 20px;
    }

    .section-title {
        font-size: clamp(30px, 4vw, 48px);
        font-weight: 800;
        line-height: 1.15;
        letter-spacing: -1px;
        margin-bottom: 16px;
    }

    .section-desc {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.7;
        max-width: 640px;
    }

    /* ====== SAME RUNTIME ====== */
    .runtime-section {
        padding: 60px 40px;
    }

    .runtime-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        max-width: 1200px;
        margin: 0 auto;
        align-items: center;
    }

    .runtime-left h2 {
        font-size: clamp(28px, 3.5vw, 40px);
        font-weight: 800;
        line-height: 1.15;
        margin-bottom: 24px;
    }

    .runtime-left .desc {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 32px;
    }

    .runtime-left .features {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .runtime-left .features li {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        font-size: 14px;
        color: var(--text-secondary);
    }

    .runtime-left .features li .dot {
        width: 6px;
        height: 6px;
        background: var(--accent-cyan);
        border-radius: 50%;
        flex-shrink: 0;
        margin-top: 8px;
    }

    .terminal-box {
        background: #0a0c10;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;
        font-size: 13px;
        line-height: 1.6;
        padding: 24px;
        color: var(--text-secondary);
    }

    .terminal-box .prompt {
        color: var(--accent-cyan);
    }

    .terminal-box .line {
        margin-top: 4px;
    }

    .terminal-box .line-muted {
        color: var(--text-muted);
        margin-top: 4px;
    }

    .terminal-box .line-gap {
        margin-top: 16px;
    }

    .terminal-box .cursor {
        display: inline-block;
        width: 8px;
        height: 16px;
        background: var(--accent-cyan);
        animation: blink 1s step-end infinite;
        vertical-align: text-bottom;
    }

    @keyframes blink {
        50% { opacity: 0; }
    }

    /* ====== FEATURES GRID ====== */
    .features-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        margin-top: 48px;
    }

    .feature-card {
        background: rgba(255, 255, 255, 0.02);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 28px;
        transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .feature-card:hover {
        border-color: rgba(34, 211, 238, 0.2);
        background: rgba(255, 255, 255, 0.04);
        transform: translateY(-4px);
        box-shadow: 0 12px 40px rgba(0,0,0,0.3), 0 0 0 1px rgba(34, 211, 238, 0.06);
    }

    .feature-card .label {
        font-size: 11px;
        font-weight: 600;
        letter-spacing: 1.5px;
        color: var(--accent-cyan);
        margin-bottom: 12px;
    }

    .feature-card h3 {
        font-size: 22px;
        font-weight: 700;
        margin-bottom: 12px;
    }

    .feature-card p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 20px;
    }

    .feature-card .preview {
        background: var(--bg-secondary);
        border: 1px solid rgba(255, 255, 255, 0.03);
        border-radius: var(--radius-sm);
        padding: 16px;
        font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;
        font-size: 12px;
        color: var(--text-muted);
        line-height: 1.6;
    }

    .feature-card .preview .cyan {
        color: var(--accent-cyan);
    }

    .feature-card .preview .green {
        color: #4ade80;
    }

    /* ====== MODE CARDS ====== */
    .mode-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        margin-top: 48px;
    }

    .mode-card {
        background: rgba(255, 255, 255, 0.02);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 28px;
        display: flex;
        gap: 16px;
        transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .mode-card:hover {
        border-color: rgba(34, 211, 238, 0.2);
        background: rgba(255, 255, 255, 0.04);
        transform: translateY(-4px);
        box-shadow: 0 12px 40px rgba(0,0,0,0.3), 0 0 0 1px rgba(34, 211, 238, 0.06);
    }

    .mode-card .icon-box {
        width: 40px;
        height: 40px;
        background: rgba(34, 211, 238, 0.08);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        color: var(--accent-cyan);
    }

    .mode-card .icon-box svg {
        width: 18px;
        height: 18px;
    }

    .mode-card h3 {
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 6px;
    }

    .mode-card p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.7;
    }

    .mode-card .screenshot {
        margin-top: 16px;
        background: var(--bg-secondary);
        border: 1px solid rgba(255, 255, 255, 0.03);
        border-radius: var(--radius-sm);
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        transition: all 0.3s;
    }
    .mode-card .screenshot img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }
    .mode-card:hover .screenshot {
        border-color: rgba(34, 211, 238, 0.15);
    }

    /* ====== WORKFLOW ====== */
    .workflow-section {
        background: var(--bg-secondary);
        border-radius: var(--radius-xl);
        padding: 80px 48px;
        margin: 0 40px 100px;
        border: 1px solid var(--border-color);
    }

    .workflow-section .section-desc {
        max-width: 680px;
    }

    .workflow-steps {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 12px;
        margin-top: 48px;
        position: relative;
    }

    .workflow-step {
        text-align: center;
        padding: 24px 12px;
        background: rgba(255, 255, 255, 0.02);
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .workflow-step:hover {
        border-color: rgba(34, 211, 238, 0.2);
        background: rgba(255, 255, 255, 0.04);
        transform: translateY(-4px);
        box-shadow: 0 12px 32px rgba(0,0,0,0.25);
    }

    .workflow-step .num {
        font-size: 11px;
        font-weight: 600;
        color: var(--accent-cyan);
        letter-spacing: 1px;
        margin-bottom: 12px;
    }

    .workflow-step .icon {
        width: 44px;
        height: 44px;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 12px;
        color: var(--text-primary);
    }

    .workflow-step .icon svg {
        width: 20px;
        height: 20px;
    }

    .workflow-step h4 {
        font-size: 15px;
        font-weight: 600;
        margin-bottom: 6px;
    }

    .workflow-step p {
        font-size: 12px;
        color: var(--text-muted);
        line-height: 1.5;
    }

    /* ====== PROVIDER SECTION ====== */
    .provider-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        margin-top: 48px;
        align-items: start;
    }

    .provider-card {
        background: rgba(255, 255, 255, 0.02);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 28px;
        transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .provider-card:hover {
        border-color: rgba(34, 211, 238, 0.2);
        background: rgba(255, 255, 255, 0.04);
        transform: translateY(-3px);
        box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    }

    .provider-card .icon {
        width: 40px;
        height: 40px;
        background: rgba(34, 211, 238, 0.08);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 16px;
        color: var(--accent-cyan);
    }

    .provider-card h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 10px;
    }

    .provider-card p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 16px;
    }

    .provider-card .tags {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }

    .provider-card .tags span {
        padding: 4px 10px;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        border-radius: 4px;
        font-size: 11px;
        color: var(--text-muted);
    }

    .provider-visual {
        background: rgba(255, 255, 255, 0.02);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 24px;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .provider-visual .panel {
        background: var(--bg-secondary);
        border: 1px solid rgba(255, 255, 255, 0.03);
        border-radius: var(--radius-sm);
        padding: 16px;
        min-height: 140px;
    }

    .provider-visual .panel .panel-title {
        font-size: 11px;
        font-weight: 600;
        color: var(--text-muted);
        letter-spacing: 1px;
        margin-bottom: 12px;
    }

    .provider-visual .panel .row {
        font-size: 12px;
        color: var(--text-muted);
        margin-top: 8px;
        display: flex;
        justify-content: space-between;
    }

    .provider-visual .panel .row .val {
        color: var(--text-secondary);
    }

    /* ====== AGENT GRAPH ====== */
    .graph-section {
        padding: 100px 40px;
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }

    .graph-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        max-width: 1200px;
        margin: 0 auto;
        align-items: center;
    }

    .graph-visual {
        background: rgba(255, 255, 255, 0.02);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 24px;
        min-height: 300px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .graph-visual .graph-nodes {
        display: flex;
        gap: 24px;
        align-items: center;
        flex-wrap: wrap;
        justify-content: center;
    }

    .graph-visual .node {
        width: 70px;
        height: 70px;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 11px;
        color: var(--text-muted);
        text-align: center;
        line-height: 1.3;
        padding: 4px;
    }

    .graph-visual .node.lead {
        border-color: var(--accent-cyan);
        color: var(--accent-cyan);
    }

    .graph-right .steps {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 20px;
        margin-top: 32px;
    }

    .graph-right .steps li {
        display: flex;
        gap: 12px;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.6;
    }

    .graph-right .steps li .num {
        font-size: 12px;
        font-weight: 600;
        color: var(--accent-cyan);
        flex-shrink: 0;
        width: 24px;
    }

    /* ====== DOWNLOAD ====== */
    .download-section {
        padding: 100px 40px;
        text-align: center;
    }

    .download-section .section-desc {
        margin: 0 auto 40px;
    }

    .download-btns {
        display: flex;
        gap: 16px;
        justify-content: center;
        flex-wrap: wrap;
    }

    .download-btns .btn-dl {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 28px;
        background: rgba(255, 255, 255, 0.02);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sm);
        color: var(--text-primary);
        font-weight: 600;
        font-size: 14px;
        transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .download-btns .btn-dl:hover {
        border-color: rgba(34, 211, 238, 0.3);
        background: rgba(255, 255, 255, 0.04);
        transform: translateY(-3px);
        box-shadow: 0 8px 30px rgba(0,0,0,0.3), 0 0 0 1px rgba(34, 211, 238, 0.08);
    }

    .download-btns .btn-dl .os-name {
        font-weight: 400;
        color: var(--text-muted);
        font-size: 12px;
    }

    /* ====== FAQ ====== */
    .faq-section {
        padding: 80px 40px;
        max-width: 800px;
        margin: 0 auto;
    }

    .faq-item {
        border-bottom: 1px solid var(--border-color);
        padding: 20px 0;
    }

    .faq-item:first-child {
        border-top: 1px solid var(--border-color);
    }

    .faq-item .q {
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 15px;
        font-weight: 600;
        cursor: pointer;
        color: var(--text-primary);
    }

    .faq-item .q .arrow {
        color: var(--text-muted);
        transition: transform 0.2s;
    }

    .faq-item .a {
        margin-top: 12px;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        display: none;
    }

    .faq-item.open .a {
        display: block;
    }

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

    /* ====== FOOTER ====== */
    .footer {
        padding: 48px 40px;
        border-top: 1px solid var(--border-color);
        display: flex;
        justify-content: space-between;
        align-items: center;
        max-width: 1200px;
        margin: 0 auto;
    }

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

    .footer-links a {
        font-size: 13px;
        color: var(--text-muted);
        transition: color 0.2s;
    }

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

    .footer .copy {
        font-size: 12px;
        color: var(--text-muted);
    }

    /* ====== RESPONSIVE ====== */
    @media (max-width: 1024px) {
        .hero-right {
            display: none;
        }

        .runtime-grid {
            grid-template-columns: 1fr;
        }

        .workflow-steps {
            grid-template-columns: 1fr 1fr 1fr;
        }

        .provider-grid {
            grid-template-columns: 1fr;
        }

        .graph-grid {
            grid-template-columns: 1fr;
        }

        .graph-visual {
            order: -1;
        }
    }

    @media (max-width: 768px) {
        .nav {
            padding: 0 20px;
        }

        .hero, .section, .runtime-section, .graph-section, .download-section, .faq-section {
            padding-left: 20px;
            padding-right: 20px;
        }

        .workflow-section {
            margin-left: 20px;
            margin-right: 20px;
            padding: 40px 24px;
        }

        .features-grid,
        .mode-grid {
            grid-template-columns: 1fr;
        }

        .workflow-steps {
            grid-template-columns: 1fr 1fr;
        }

        .provider-visual {
            grid-template-columns: 1fr;
        }

        .footer {
            flex-direction: column;
            gap: 20px;
            text-align: center;
        }

        .nav-right a:not(.btn-download-nav) {
            display: none;
        }
    }

    @media (max-width: 480px) {
        .workflow-steps {
            grid-template-columns: 1fr;
        }
    }