/* ===== 0070 暗黑极客风 ===== */
:root {
    --lime-300: #bef264;
    --lime-400: #a3e635;
    --lime-500: #84cc16;
    --lime-600: #65a30d;
    --gray-800: #1e293b;
    --gray-850: #1a1f2e;
    --gray-900: #111827;
    --gray-950: #0a0d14;
    --gray-700: #334155;
    --gray-600: #475569;
    --gray-500: #64748b;
    --gray-400: #94a3b8;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    scroll-behavior: smooth;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Consolas', monospace; color: var(--text-primary); background: var(--gray-950); overflow-x: hidden; }

/* Grid pattern background */
body::before {
    content: ''; position: fixed; inset: 0; z-index: -1; opacity: 0.03;
    background-image:
        linear-gradient(rgba(163,230,53,0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(163,230,53,0.3) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* Navbar */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(10,13,20,0.92); backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(163,230,53,0.1);
}
.nav-container {
    max-width: 1280px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between; height: 68px;
}
.nav-logo {
    font-size: 1.5rem; font-weight: 900; color: var(--lime-400); text-decoration: none;
    text-shadow: 0 0 20px rgba(163,230,53,0.4); letter-spacing: -0.5px;
}
.nav-logo .bracket { color: var(--gray-500); }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
    color: var(--text-secondary); text-decoration: none; font-weight: 500;
    font-size: 0.9rem; padding: 8px 14px; border-radius: 4px;
    transition: all 0.25s; position: relative; font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: 0; left: 14px; right: 14px;
    height: 2px; background: var(--lime-500);
    transform: scaleX(0); transition: transform 0.25s ease;
    box-shadow: 0 0 8px rgba(132,204,22,0.5);
}
.nav-links a:hover { color: var(--lime-400); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta-btn {
    background: transparent; border: 1px solid var(--lime-500); color: var(--lime-400) !important;
    padding: 9px 20px !important; border-radius: 4px !important; font-weight: 600 !important;
    margin-left: 8px; transition: all 0.3s !important;
}
.nav-cta-btn:hover { background: var(--lime-500); color: var(--gray-950) !important; box-shadow: 0 0 20px rgba(132,204,22,0.3); }
.nav-cta-btn::after { display: none !important; }

/* Mobile */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 8px; }
.hamburger span { display: block; width: 26px; height: 2.5px; background: var(--lime-400); border-radius: 3px; transition: 0.3s; }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }
.mobile-menu {
    display: none; position: fixed; top: 68px; left: 0; right: 0; bottom: 0;
    background: rgba(10,13,20,0.97); backdrop-filter: blur(16px);
    z-index: 999; flex-direction: column; padding-top: 20px;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
    color: var(--text-primary); font-size: 1.1rem; font-weight: 600; text-decoration: none;
    padding: 16px 24px; border-bottom: 1px solid rgba(255,255,255,0.04);
}

/* Hero */
.hero {
    min-height: 100vh; display: flex; align-items: center;
    position: relative; overflow: hidden; padding-top: 68px;
}
.hero-glow {
    position: absolute; width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(132,204,22,0.06) 0%, transparent 70%);
    top: -100px; right: -100px; border-radius: 50%;
}
.hero .container {
    display: flex; align-items: center; gap: 60px;
    max-width: 1280px; margin: 0 auto; padding: 60px 24px; position: relative; z-index: 1;
}
.hero-left { flex: 1; }
.hero-left .terminal-tag {
    display: inline-block; font-family: 'Consolas', 'Courier New', monospace;
    color: var(--lime-400); font-size: 0.85rem; margin-bottom: 20px;
    border: 1px solid rgba(163,230,53,0.2); padding: 6px 14px; border-radius: 4px;
}
.hero-left .terminal-tag .dot { color: var(--lime-500); animation: blink 1s infinite; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }
.hero-left h1 {
    font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 900; line-height: 1.12;
    margin-bottom: 18px;
}
.hero-left h1 .glow {
    color: var(--lime-400);
    text-shadow: 0 0 30px rgba(163,230,53,0.5), 0 0 60px rgba(132,204,22,0.3), 0 0 90px rgba(132,204,22,0.15);
}
.hero-left p { font-size: 1.1rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 32px; max-width: 520px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
    background: var(--lime-500); color: var(--gray-950); padding: 14px 32px;
    border-radius: 4px; font-weight: 700; font-size: 1rem;
    text-decoration: none; transition: all 0.3s; box-shadow: 0 0 20px rgba(132,204,22,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(132,204,22,0.5); }
.btn-outline {
    border: 1px solid var(--gray-600); color: var(--text-primary);
    padding: 14px 32px; border-radius: 4px; font-weight: 700;
    font-size: 1rem; text-decoration: none; transition: all 0.3s;
}
.btn-outline:hover { border-color: var(--lime-500); color: var(--lime-400); box-shadow: 0 0 12px rgba(132,204,22,0.15); }

/* Terminal window mockup */
.hero-right { flex-shrink: 0; }
.terminal-window {
    width: 420px; background: rgba(15,15,20,0.9); border-radius: 8px;
    overflow: hidden; border: 1px solid rgba(163,230,53,0.15);
    box-shadow: 0 0 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(163,230,53,0.05);
}
.terminal-header {
    background: rgba(30,30,40,0.8); padding: 10px 14px;
    display: flex; align-items: center; gap: 8px;
}
.term-dot { width: 12px; height: 12px; border-radius: 50%; }
.term-dot.r { background: #ef4444; }
.term-dot.y { background: #f59e0b; }
.term-dot.g { background: #10b981; }
.term-title { margin-left: 12px; font-size: 0.78rem; color: var(--gray-500); font-family: 'Consolas', monospace; }
.terminal-body {
    padding: 20px; font-family: 'Consolas', 'Courier New', monospace; font-size: 0.82rem;
    line-height: 1.9; color: var(--text-secondary);
}
.terminal-body .line .prompt { color: var(--lime-400); }
.terminal-body .line .cmd { color: var(--text-primary); }
.terminal-body .line .output { color: var(--gray-500); }
.terminal-body .cursor-line { }
.terminal-body .cursor-line .cursor {
    display: inline-block; width: 8px; height: 16px;
    background: var(--lime-400); animation: blink 0.7s infinite; vertical-align: text-bottom;
}

/* Sections */
section { padding: 100px 24px; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
    display: inline-block; font-family: 'Consolas', 'Courier New', monospace;
    color: var(--lime-400); font-size: 0.82rem; letter-spacing: 1px;
    margin-bottom: 14px; border: 1px solid rgba(163,230,53,0.15);
    padding: 4px 14px; border-radius: 3px;
}
.section-tag::before { content: '// '; color: var(--gray-600); }
.section-header h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); font-weight: 800; color: var(--text-primary); margin-bottom: 12px; }
.section-header p { color: var(--text-secondary); font-size: 1.05rem; }
.container { max-width: 1280px; margin: 0 auto; }

/* Features - dark cards with glow hover */
#features { background: rgba(17,24,39,0.5); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
    background: rgba(15,15,20,0.7); border: 1px solid rgba(163,230,53,0.1);
    border-radius: 8px; padding: 30px 24px; transition: all 0.4s ease;
    position: relative; overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, rgba(132,204,22,0.03) 0%, transparent 70%);
    opacity: 0; transition: opacity 0.4s;
}
.feature-card:hover {
    border-color: var(--lime-500);
    box-shadow: 0 0 24px rgba(132,204,22,0.1), 0 0 0 1px rgba(132,204,22,0.2) inset;
    transform: translateY(-6px);
}
.feature-card:hover::before { opacity: 1; }
.feature-card .icon-wrap {
    width: 50px; height: 50px; border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem; margin-bottom: 18px; position: relative;
}
.feature-card .icon-wrap.green {
    background: rgba(132,204,22,0.1); color: var(--lime-400);
    filter: drop-shadow(0 0 6px rgba(132,204,22,0.3));
}
.feature-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; position: relative; }
.feature-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; position: relative; }

/* Stats - green progress bars */
#stats { background: rgba(15,15,20,0.6); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { text-align: center; padding: 20px; }
.stat-item .stat-num { font-size: 2.8rem; font-weight: 900; color: var(--lime-400); margin-bottom: 6px; }
.stat-item .stat-label { color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; margin-bottom: 12px; }
.stat-bar {
    height: 4px; background: rgba(255,255,255,0.05); border-radius: 2px; overflow: hidden;
    max-width: 200px; margin: 0 auto;
}
.stat-bar-fill {
    height: 100%; background: linear-gradient(90deg, var(--lime-600), var(--lime-400));
    border-radius: 2px; transition: width 1.5s ease;
    box-shadow: 0 0 8px rgba(132,204,22,0.3);
}

/* Testimonials - dark cards */
#testimonials { }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.testimonial-card {
    background: rgba(15,15,20,0.7); border: 1px solid rgba(255,255,255,0.05);
    border-radius: 8px; padding: 28px 22px; transition: all 0.3s;
}
.testimonial-card:hover { border-color: rgba(132,204,22,0.25); transform: translateY(-4px); }
.testimonial-card .author-row { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.testimonial-card .avatar {
    width: 48px; height: 48px; border-radius: 50%; overflow: hidden;
    border: 2px solid var(--lime-500); box-shadow: 0 0 12px rgba(132,204,22,0.2);
}
.testimonial-card .avatar img { width: 100%; height: 100%; object-fit: cover; }
.testimonial-card .author { font-weight: 700; font-size: 0.92rem; color: var(--text-primary); }
.testimonial-card .role { font-size: 0.78rem; color: var(--gray-500); }
.testimonial-card .stars { margin-bottom: 10px; color: var(--lime-400); font-size: 0.85rem; }
.testimonial-card blockquote { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; font-style: italic; }

/* FAQ - dark accordion with glow left border */
#faq { background: rgba(17,24,39,0.5); }
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-item { margin-bottom: 10px; }
.faq-item details {
    background: rgba(15,15,20,0.7); border: 1px solid rgba(255,255,255,0.04);
    border-radius: 6px; overflow: hidden; transition: all 0.3s;
}
.faq-item details[open] {
    border-left: 3px solid var(--lime-500);
    box-shadow: 0 0 16px rgba(132,204,22,0.06);
}
.faq-item summary {
    padding: 18px 20px; font-weight: 600; cursor: pointer; list-style: none;
    display: flex; justify-content: space-between; align-items: center;
    color: var(--text-primary); font-size: 0.98rem; transition: color 0.3s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--lime-400); }
.faq-arrow { transition: transform 0.3s; color: var(--lime-500); font-size: 0.7rem; }
.faq-item details[open] .faq-arrow { transform: rotate(180deg); }
.faq-item .faq-answer { padding: 0 20px 18px; color: var(--text-secondary); line-height: 1.8; font-size: 0.9rem; }

/* CTA - black bg + green glow */
#cta {
    text-align: center; background: rgba(10,13,20,0.8);
    position: relative; overflow: hidden;
}
#cta::before {
    content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(132,204,22,0.06) 0%, transparent 70%);
    border-radius: 50%;
}
.cta-content { position: relative; max-width: 600px; margin: 0 auto; }
#cta h2 { font-size: 2.2rem; font-weight: 900; color: #fff; margin-bottom: 12px; }
#cta p { color: var(--text-secondary); margin-bottom: 32px; font-size: 1.05rem; line-height: 1.7; }
.btn-glow {
    background: var(--lime-500); color: var(--gray-950); padding: 15px 40px;
    border-radius: 4px; font-weight: 700; font-size: 1.05rem;
    text-decoration: none; display: inline-block; transition: all 0.3s;
    box-shadow: 0 0 20px rgba(132,204,22,0.3);
    animation: pulseGlow 2s infinite;
}
@keyframes pulseGlow {
    0% { box-shadow: 0 0 20px rgba(132,204,22,0.3); }
    50% { box-shadow: 0 0 40px rgba(132,204,22,0.6), 0 0 80px rgba(132,204,22,0.2); }
    100% { box-shadow: 0 0 20px rgba(132,204,22,0.3); }
}
.btn-glow:hover { transform: translateY(-2px); }

/* Footer */
footer { background: rgba(5,5,10,0.95); border-top: 1px solid rgba(163,230,53,0.08); color: var(--text-secondary); padding: 60px 24px 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; max-width: 1280px; margin: 0 auto 40px; }
.footer-col h4 { color: #fff; font-size: 1.05rem; font-weight: 700; margin-bottom: 20px; }
.footer-col p { font-size: 0.88rem; line-height: 1.7; }
.footer-col a { display: block; color: var(--text-secondary); text-decoration: none; font-size: 0.86rem; margin-bottom: 8px; transition: color 0.3s; }
.footer-col a:hover { color: var(--lime-400); }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.04); font-size: 0.82rem; max-width: 1280px; margin: 0 auto; color: var(--gray-600); }

/* Page hero */
.page-hero {
    padding: 120px 24px 50px; text-align: center;
    background: linear-gradient(180deg, rgba(17,24,39,0.5) 0%, transparent 100%);
}
.page-hero h1 { font-size: 2rem; font-weight: 900; color: #fff; margin-bottom: 8px; }
.page-hero p { color: var(--text-secondary); font-size: 1rem; }

/* Sub pages */
.download-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 800px; margin: 0 auto; }
.download-card {
    background: rgba(15,15,20,0.7); border: 1px solid rgba(132,204,22,0.1);
    border-radius: 8px; padding: 36px; text-align: center; transition: all 0.3s;
}
.download-card:hover { border-color: var(--lime-500); box-shadow: 0 0 20px rgba(132,204,22,0.08); transform: translateY(-4px); }
.download-card .icon-big { font-size: 3rem; margin-bottom: 16px; }
.download-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 6px; color: var(--text-primary); }
.download-card p { color: var(--text-secondary); margin-bottom: 16px; }

.club-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.club-card {
    background: rgba(15,15,20,0.7); border: 1px solid rgba(255,255,255,0.04);
    border-radius: 8px; padding: 28px 22px; text-align: center; transition: all 0.3s;
}
.club-card:hover { border-color: var(--lime-500); transform: translateY(-4px); box-shadow: 0 0 16px rgba(132,204,22,0.06); }
.club-icon { font-size: 2.5rem; margin-bottom: 12px; }
.club-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.club-card .level { color: var(--lime-400); font-weight: 600; font-size: 0.82rem; margin-bottom: 8px; }
.club-card p { color: var(--text-secondary); font-size: 0.84rem; line-height: 1.6; }

.contact-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 30px; max-width: 900px; margin: 0 auto; }
.contact-info-card {
    background: rgba(15,15,20,0.8); border: 1px solid rgba(132,204,22,0.1);
    border-radius: 8px; padding: 32px 24px; color: var(--text-primary);
}
.contact-info-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 16px; color: var(--lime-400); }
.contact-info-card .info-item { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 14px; }
.contact-info-card .info-item i { margin-top: 4px; color: var(--lime-500); }
.contact-form-card {
    background: rgba(15,15,20,0.7); border: 1px solid rgba(255,255,255,0.04);
    border-radius: 8px; padding: 32px 24px;
}
.contact-form-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; color: var(--text-primary); }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 5px; color: var(--text-secondary); font-size: 0.88rem; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 12px 14px; border-radius: 6px;
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
    color: var(--text-primary); font-size: 0.92rem; outline: none; font-family: inherit;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    border-color: var(--lime-500); box-shadow: 0 0 8px rgba(132,204,22,0.1);
}

/* Responsive */
@media (max-width: 1024px) {
    .features-grid, .testimonials-grid, .club-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .hero .container { gap: 40px; }
    .terminal-window { width: 340px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hamburger { display: flex; }
    .hero .container { flex-direction: column; text-align: center; }
    .hero-right { display: none; }
    .hero-left p { margin-left: auto; margin-right: auto; }
    .hero-btns { justify-content: center; }
    .features-grid, .testimonials-grid, .club-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .download-cards { grid-template-columns: 1fr; }
    section { padding: 64px 16px; }
    .page-hero { padding: 100px 16px 36px; }
}