:root {
    --primary: #7c3aed;
    --primary-light: #a78bfa;
    --accent: #06b6d4;
    --dark: #0f0f0f;
    --dark-2: #1a1a1a;
    --dark-3: #2a2a2a;
    --light: #fafafa;
    --gray: #888;
    --glass: rgba(255,255,255,0.03);
    --glass-border: rgba(255,255,255,0.08);
    --gradient: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
    --radius: 16px;
    --radius-sm: 8px;
}

* { 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; background: var(--dark); color: var(--light); line-height: 1.7; -webkit-font-smoothing: antialiased; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; transition: all 0.3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* Header */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 20px 0; transition: all 0.3s; }
.header.scrolled { background: rgba(15,15,15,0.9); backdrop-filter: blur(20px); padding: 12px 0; border-bottom: 1px solid var(--glass-border); }
.nav { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 12px; font-size: 1.25rem; font-weight: 700; }
.logo-img { width: 36px; height: 36px; border-radius: 8px; }
.logo em { font-style: normal; color: var(--primary-light); }
.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-menu a { padding: 10px 18px; font-size: 0.9rem; color: rgba(255,255,255,0.7); border-radius: 8px; }
.nav-menu a:hover { color: #fff; background: var(--glass); }
.nav-btn { background: var(--gradient) !important; color: #fff !important; font-weight: 500; }
.menu-toggle { display: none; width: 40px; height: 40px; background: none; border: none; cursor: pointer; position: relative; }
.menu-toggle span { display: block; width: 20px; height: 2px; background: #fff; position: absolute; left: 10px; transition: all 0.3s; }
.menu-toggle span:first-child { top: 14px; }
.menu-toggle span:last-child { top: 24px; }
.menu-toggle.active span:first-child { transform: rotate(45deg); top: 19px; }
.menu-toggle.active span:last-child { transform: rotate(-45deg); top: 19px; }

/* Hero */
.hero { min-height: 100vh; display: flex; align-items: center; position: relative; padding: 120px 0 80px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124,58,237,0.3), transparent), radial-gradient(ellipse 60% 40% at 80% 60%, rgba(6,182,212,0.15), transparent); }
.hero-bg::before { content: ''; position: absolute; inset: 0; background: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); opacity: 0.03; }
.hero-content { position: relative; text-align: center; max-width: 900px; margin: 0 auto; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 20px; background: var(--glass); border: 1px solid var(--glass-border); border-radius: 50px; font-size: 0.85rem; color: var(--primary-light); margin-bottom: 32px; }
.hero h1 { font-size: clamp(2.5rem, 7vw, 4.5rem); font-weight: 800; line-height: 1.1; margin-bottom: 24px; letter-spacing: -0.02em; }
.gradient-text { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: clamp(1rem, 2vw, 1.25rem); color: var(--gray); max-width: 640px; margin: 0 auto 40px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.btn-primary { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; background: var(--gradient); color: #fff; font-weight: 600; border-radius: 12px; font-size: 1rem; box-shadow: 0 4px 24px rgba(124,58,237,0.4); transition: all 0.3s; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(124,58,237,0.5); }
.btn-outline { padding: 14px 28px; border: 1px solid var(--glass-border); color: #fff; border-radius: 12px; font-weight: 500; background: var(--glass); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); }
.btn-outline.light { border-color: rgba(255,255,255,0.3); }
.hero-stats { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; }
.stat { text-align: center; }
.stat strong { display: block; font-size: 2rem; font-weight: 700; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat span { font-size: 0.9rem; color: var(--gray); }

/* Brands */
.brands { padding: 60px 0; border-bottom: 1px solid var(--glass-border); }
.brands p { text-align: center; font-size: 0.85rem; color: var(--gray); margin-bottom: 24px; }
.brands-list { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; }
.brands-list span { font-size: 1.1rem; font-weight: 600; color: rgba(255,255,255,0.3); letter-spacing: 0.05em; }

/* Sections */
.section { padding: 100px 0; }
.section.dark { background: var(--dark-2); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 64px; }
.section-head.light h2, .section-head.light p { color: #fff; }
.tag { display: inline-block; padding: 6px 14px; background: rgba(124,58,237,0.15); color: var(--primary-light); font-size: 0.8rem; font-weight: 600; border-radius: 50px; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.1em; }
.tag.purple { background: rgba(124,58,237,0.2); }
.section-head h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 700; margin-bottom: 16px; }
.section-head p { color: var(--gray); font-size: 1.1rem; }

/* Cards */
.card { background: var(--glass); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 32px; transition: all 0.3s; }
.card:hover { border-color: rgba(255,255,255,0.15); background: rgba(255,255,255,0.05); }
.card h3 { font-size: 1.5rem; margin-bottom: 16px; }
.card h4 { font-size: 1rem; color: var(--primary-light); margin-bottom: 12px; font-weight: 500; }
.card p { color: var(--gray); line-height: 1.8; }
.card.mini { padding: 24px; }
.card.mini h4 { font-size: 1.1rem; color: #fff; margin-bottom: 8px; }
.card.mini p { font-size: 0.9rem; }
.card-icon { width: 48px; height: 48px; background: var(--gradient); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.card-icon svg { stroke: #fff; }

/* About */
.about-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 32px; align-items: start; }
.about-cards { display: flex; flex-direction: column; gap: 16px; }

/* Features */
.features-list { display: flex; flex-direction: column; gap: 80px; }
.feature-item { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.feature-item.reverse { direction: rtl; }
.feature-item.reverse > * { direction: ltr; }
.feature-text .num { font-size: 4rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; opacity: 0.3; line-height: 1; }
.feature-text h3 { font-size: 1.75rem; margin: 8px 0; }
.feature-text h4 { color: var(--accent); font-size: 1rem; margin-bottom: 16px; font-weight: 500; }
.feature-text p { color: var(--gray); margin-bottom: 20px; }
.feature-text ul { display: flex; flex-direction: column; gap: 8px; }
.feature-text li { padding-left: 24px; position: relative; color: rgba(255,255,255,0.8); }
.feature-text li::before { content: '→'; position: absolute; left: 0; color: var(--primary-light); }
.feature-visual { display: flex; justify-content: center; }

/* Code Box */
.code-box { background: var(--dark-3); border-radius: var(--radius); overflow: hidden; width: 100%; max-width: 400px; border: 1px solid var(--glass-border); }
.code-header { display: flex; gap: 8px; padding: 16px 20px; background: rgba(0,0,0,0.3); }
.code-header i { width: 12px; height: 12px; border-radius: 50%; background: #ff5f56; }
.code-header i:nth-child(2) { background: #ffbd2e; }
.code-header i:nth-child(3) { background: #27ca40; }
.code-box pre { padding: 20px; font-size: 0.85rem; overflow-x: auto; }
.code-box code { font-family: 'SF Mono', Monaco, monospace; color: #e2e8f0; }
.code-box code em { color: var(--gray); font-style: normal; }

/* Workflow */
.workflow { display: flex; align-items: center; gap: 0; background: var(--dark-3); padding: 32px; border-radius: var(--radius); border: 1px solid var(--glass-border); }
.wf-step { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 16px; }
.wf-step span:first-child { width: 40px; height: 40px; background: var(--dark); border: 2px solid var(--glass-border); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1rem; }
.wf-step.done span:first-child { background: var(--accent); border-color: var(--accent); color: #000; }
.wf-step.active span:first-child { border-color: var(--primary); animation: pulse 2s infinite; }
.wf-line { flex: 1; height: 2px; background: var(--glass-border); min-width: 20px; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(124,58,237,0.4); } 50% { box-shadow: 0 0 0 8px rgba(124,58,237,0); } }

/* Kanban */
.kanban { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; background: var(--dark-3); padding: 24px; border-radius: var(--radius); border: 1px solid var(--glass-border); }
.kb-col { display: flex; flex-direction: column; gap: 12px; }
.kb-col strong { font-size: 0.8rem; color: var(--gray); text-transform: uppercase; letter-spacing: 0.1em; }
.kb-card { background: var(--dark-2); padding: 12px 16px; border-radius: var(--radius-sm); font-size: 0.9rem; border-left: 3px solid var(--glass-border); }
.kb-card.hl { border-color: var(--primary); background: rgba(124,58,237,0.1); }
.kb-card.ok { border-color: var(--accent); opacity: 0.6; }

/* Copilot */
.copilot-section { background: linear-gradient(180deg, var(--dark-2) 0%, var(--dark) 100%); position: relative; overflow: hidden; }
.copilot-section::before { content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 800px; height: 800px; background: radial-gradient(circle, rgba(124,58,237,0.15), transparent 70%); pointer-events: none; }
.copilot-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; position: relative; }
.copilot-info h3 { font-size: 1.5rem; margin-bottom: 16px; }
.copilot-info > p { color: var(--gray); margin-bottom: 32px; }
.copilot-features { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.cf-item h4 { font-size: 1rem; margin-bottom: 8px; color: #fff; }
.cf-item p { font-size: 0.9rem; color: var(--gray); }
.copilot-stats { display: flex; flex-direction: column; gap: 20px; }
.cs-card { background: var(--glass); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 28px; text-align: center; }
.cs-card strong { display: block; font-size: 3rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.cs-card span { color: var(--gray); font-size: 0.95rem; }

/* Timeline */
.timeline { position: relative; max-width: 700px; margin: 0 auto; }
.timeline::before { content: ''; position: absolute; left: 24px; top: 0; bottom: 0; width: 2px; background: linear-gradient(180deg, var(--primary), var(--accent)); }
.tl-item { display: flex; gap: 32px; margin-bottom: 32px; position: relative; }
.tl-num { width: 50px; height: 50px; background: var(--gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; font-weight: 700; flex-shrink: 0; position: relative; z-index: 1; }
.tl-content { flex: 1; }
.tl-content h3 { margin-bottom: 8px; font-size: 1.25rem; }
.tl-content h4 { color: var(--primary-light); font-weight: 500; margin-bottom: 8px; font-size: 0.95rem; }
.tl-content p { color: var(--gray); font-size: 0.95rem; }

/* Scenarios */
.scenarios { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.scenario { text-align: center; padding: 40px 24px; }
.s-icon { width: 64px; height: 64px; background: var(--glass); border: 1px solid var(--glass-border); border-radius: 16px; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; }
.s-icon svg { stroke: var(--primary-light); }
.scenario h3 { margin-bottom: 12px; font-size: 1.1rem; }
.scenario p { font-size: 0.9rem; color: var(--gray); }

/* CTA */
.cta-section { padding: 80px 0; }
.cta-box { background: var(--gradient); border-radius: var(--radius); padding: 64px; text-align: center; position: relative; overflow: hidden; }
.cta-box::before { content: ''; position: absolute; inset: 0; background: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); opacity: 0.1; }
.cta-box h2 { font-size: clamp(1.5rem, 4vw, 2rem); margin-bottom: 16px; position: relative; }
.cta-box p { color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 32px; position: relative; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; }
.cta-btns .btn-primary { background: #fff; color: var(--primary); box-shadow: 0 4px 24px rgba(0,0,0,0.2); }
.cta-btns .btn-primary:hover { transform: translateY(-2px); }

/* Footer */
.footer { background: var(--dark-2); padding: 80px 0 40px; border-top: 1px solid var(--glass-border); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 48px; margin-bottom: 48px; }
.footer-logo { display: flex; align-items: center; gap: 12px; font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; }
.footer-logo img { width: 32px; height: 32px; border-radius: 6px; }
.footer-brand p { color: var(--gray); font-size: 0.9rem; max-width: 280px; }
.footer-links h3 { font-size: 0.9rem; font-weight: 600; margin-bottom: 20px; color: #fff; }
.footer-links ul { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 0.9rem; color: var(--gray); }
.footer-links a:hover { color: #fff; }
.footer-bottom { padding-top: 32px; border-top: 1px solid var(--glass-border); text-align: center; }
.footer-bottom p { font-size: 0.85rem; color: var(--gray); }

/* Responsive */
@media (max-width: 1024px) {
    .about-grid, .feature-item, .copilot-grid { grid-template-columns: 1fr; gap: 40px; }
    .feature-item.reverse { direction: ltr; }
    .scenarios { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .nav-menu { position: fixed; inset: 0; top: 72px; background: var(--dark); flex-direction: column; padding: 40px 24px; gap: 8px; transform: translateX(100%); transition: transform 0.3s; }
    .nav-menu.active { transform: translateX(0); }
    .nav-menu a { padding: 16px; font-size: 1.1rem; }
    .menu-toggle { display: block; }
    .hero { padding-top: 100px; }
    .hero-stats { gap: 32px; }
    .stat strong { font-size: 1.5rem; }
    .section { padding: 60px 0; }
    .features-list { gap: 48px; }
    .workflow { flex-wrap: wrap; justify-content: center; }
    .kanban { grid-template-columns: 1fr; }
    .copilot-features { grid-template-columns: 1fr; }
    .timeline::before { left: 24px; }
    .scenarios { grid-template-columns: 1fr; }
    .cta-box { padding: 40px 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; text-align: center; }
    .footer-brand { display: flex; flex-direction: column; align-items: center; }
    .footer-brand p { max-width: none; }
}
@media (max-width: 480px) {
    .hero h1 { font-size: 2rem; }
    .btn-primary, .btn-outline { width: 100%; justify-content: center; }
    .hero-btns { flex-direction: column; }
    .brands-list { gap: 20px; }
    .brands-list span { font-size: 0.9rem; }
}