:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
    --shadow-primary: 0 8px 24px rgba(37, 99, 235, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
                 'Microsoft YaHei', sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-logo {
    color: var(--primary);
    flex-shrink: 0;
}

.brand-text {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.brand-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
}

.brand-badge {
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.1));
    padding: 2px 8px;
    border-radius: 4px;
}

.nav-menu {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link-primary {
    color: var(--primary);
    font-weight: 600;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-light);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.section-badge svg {
    color: var(--primary);
}

.section-badge-primary {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.1));
    color: var(--primary);
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--bg-light) 0%, #f1f5f9 100%);
    padding: 180px 0 120px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.1));
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 32px;
}

.hero-badge svg {
    color: var(--primary);
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    display: block;
    font-size: 32px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 8px;
}

.hero-description {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-large {
    padding: 16px 40px;
    font-size: 16px;
}

.btn-small {
    padding: 10px 20px;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Terminal Visual */
.hero-visual {
    position: relative;
    z-index: 1;
}

.terminal-window {
    background: #1e293b;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.3);
}

.terminal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: #0f172a;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.terminal-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #22c55e; }

.terminal-title {
    font-size: 13px;
    color: var(--text-muted);
    font-family: 'Consolas', 'Monaco', monospace;
}

.terminal-body {
    padding: 24px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.8;
    min-height: 280px;
}

.terminal-line {
    margin-bottom: 8px;
    display: flex;
    gap: 8px;
}

.prompt {
    color: #22c55e;
    font-weight: 600;
}

.command {
    color: #f1f5f9;
}

.cursor {
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.success {
    color: #22c55e;
}

.output {
    color: var(--text-muted);
    display: block;
    line-height: 1.6;
}

.terminal-info {
    display: flex;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(37, 99, 235, 0.1);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.info-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--primary-light);
    font-weight: 500;
}

/* Features */
.features {
    background: var(--bg-white);
}

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

.feature-card {
    background: var(--bg-light);
    padding: 40px 32px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
    background: white;
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.1));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-bottom: 24px;
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-desc {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Download */
.download {
    background: var(--bg-light);
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 48px;
}

.security-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: white;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

.security-badge svg {
    color: #22c55e;
}

.download-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto 32px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 32px 40px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.download-btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}

.download-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(37, 99, 235, 0.4);
}

.download-btn-primary svg:first-child {
    color: white;
}

.download-btn-primary .btn-title {
    color: white;
}

.download-btn-primary .btn-desc {
    color: rgba(255, 255, 255, 0.85);
}

.download-btn-primary .btn-arrow {
    color: white;
}

.download-btn-secondary {
    background: white;
    border: 2px solid var(--border);
}

.download-btn-secondary:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.download-btn-secondary svg:first-child {
    color: var(--text-secondary);
}

.download-btn-secondary .btn-title {
    color: var(--text-primary);
}

.download-btn-secondary .btn-desc {
    color: var(--text-secondary);
}

.download-btn-secondary .btn-arrow {
    color: var(--text-secondary);
}

.btn-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.btn-title {
    font-size: 20px;
    font-weight: 700;
}

.btn-desc {
    font-size: 14px;
    font-weight: 500;
}

.code-inline {
    font-family: 'Consolas', 'Monaco', monospace;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.1));
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.btn-arrow {
    flex-shrink: 0;
    transition: var(--transition);
}

.download-btn:hover .btn-arrow {
    transform: translateX(4px);
}

.download-notice {
    display: flex;
    justify-content: center;
    margin-top: 32px;
    padding: 16px 24px;
    background: white;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
}

/* Tutorial */
.tutorial {
    background: var(--bg-white);
}

.tutorial-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.tutorial-step {
    position: relative;
    background: var(--bg-light);
    padding: 32px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
}

.tutorial-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    background: white;
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.step-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
}

.step-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.step-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.step-code {
    text-align: left;
    margin-top: 20px;
}

.code-block {
    background: #1e293b;
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-top: 16px;
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
}

.code-block pre {
    margin: 0;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    line-height: 1.6;
    color: #f1f5f9;
}

.code-block pre code {
    position: relative;
    padding-left: 12px;
    border-left: 3px solid var(--primary);
}

.step-config {
    text-align: left;
    margin-top: 16px;
}

.config-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    background: white;
    border-radius: 6px;
    margin-bottom: 8px;
    font-size: 13px;
}

.config-label {
    color: var(--text-secondary);
}

.config-value {
    font-weight: 600;
    color: var(--text-primary);
}

.step-checklist {
    text-align: left;
    margin-top: 16px;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.checklist-item svg {
    color: #22c55e;
    flex-shrink: 0;
}

.step-features {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
}

.feature-mini {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    background: white;
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-secondary);
}

.feature-mini svg {
    color: var(--primary);
}

/* FAQ */
.faq {
    background: var(--bg-light);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 28px;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-light);
}

.question-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
    padding-right: 16px;
}

.faq-icon {
    color: var(--text-secondary);
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 28px 24px;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
}

/* Footer */
.footer {
    background: #0f172a;
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand {
    padding-right: 40px;
}

.brand-logo-inline {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    color: white;
    font-weight: 700;
    font-size: 20px;
}

.footer-desc {
    line-height: 1.8;
    margin-bottom: 24px;
    font-size: 14px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary);
    color: white;
}

.footer-heading {
    color: white;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-icp {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero-visual {
        order: -1;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tutorial-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hero {
        padding: 140px 0 80px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 24px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat-divider {
        display: none;
    }

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

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

    .table-header {
        display: none;
    }

    .table-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .table-row .td {
        justify-content: flex-start;
    }

    .table-row .td.actions {
        flex-direction: column;
        width: 100%;
    }

    .table-row .td.actions .btn {
        width: 100%;
    }

    .security-badges {
        flex-direction: column;
    }

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

    .footer-brand {
        padding-right: 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .section-title {
        font-size: 32px;
    }

    .section {
        padding: 60px 0;
    }
}