:root {
    --cmd-bg: #000000;
    --cmd-text: #00ff00;
    --cmd-primary: #00ff00;
    --cmd-secondary: #00cc00;
    --cmd-accent: #ffffff;
    --cmd-error: #ff0000;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--cmd-bg); color: var(--cmd-text);
    font-family: 'Consolas', 'Courier New', monospace;
    line-height: 1.5; overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
::selection { background: var(--cmd-primary); color: var(--cmd-bg); }

.cmd-container { max-width: 900px; margin: 0 auto; padding: 20px;}

/* Terminal Window */
.terminal-window {
    border: 1px solid var(--cmd-secondary); padding: 20px;
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.2); margin-bottom: 40px;
    position: relative;
}
.terminal-window::before {
    content: 'Terminal - root@kuamiao:~'; position: absolute; top: -10px; left: 10px;
    background: var(--cmd-bg); padding: 0 10px; font-size: 12px; color: var(--cmd-secondary);
}

/* Header / Nav */
.cmd-header { margin-bottom: 40px; border-bottom: 1px dashed var(--cmd-secondary); padding-bottom: 20px;}
.cmd-brand { font-size: 24px; font-weight: bold; margin-bottom: 10px;}
.cmd-nav { display: flex; gap: 20px; }
.cmd-nav a { position: relative; padding-left: 15px;}
.cmd-nav a::before { content: '>'; position: absolute; left: 0; color: var(--cmd-secondary); opacity: 0;}
.cmd-nav a:hover::before, .cmd-nav a.active::before { opacity: 1; }
.cmd-nav a.active { text-decoration: underline; }

/* Hero */
.cmd-hero { margin-bottom: 60px;}
.prompt-line { margin-bottom: 10px; }
.prompt-line .user { color: var(--cmd-accent); }
.prompt-line .path { color: var(--cmd-secondary); }
.prompt-line .cmd { color: var(--cmd-primary); font-weight: bold;}
.output-block { margin-bottom: 20px; padding-left: 20px; border-left: 2px solid var(--cmd-secondary);}
.output-block h1 { font-size: 32px; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 2px;}
.output-block p { font-size: 16px; margin-bottom: 20px; max-width: 700px;}

.btn-cmd {
    display: inline-block; padding: 10px 20px; font-size: 16px; font-weight: bold;
    color: var(--cmd-bg); background: var(--cmd-primary); border: 1px solid var(--cmd-primary);
    transition: all 0.2s; margin-right: 15px; cursor: pointer; text-transform: uppercase;
}
.btn-cmd:hover { background: var(--cmd-bg); color: var(--cmd-primary); }
.btn-cmd-alt {
    display: inline-block; padding: 10px 20px; font-size: 16px; font-weight: bold;
    color: var(--cmd-primary); background: transparent; border: 1px dashed var(--cmd-primary);
    transition: all 0.2s; cursor: pointer; text-transform: uppercase;
}
.btn-cmd-alt:hover { background: rgba(0, 255, 0, 0.1); }

/* Stats */
.cmd-stats { display: flex; gap: 20px; margin-bottom: 60px;}
.cs-item { flex: 1; border: 1px solid var(--cmd-secondary); padding: 15px; text-align: center;}
.cs-val { font-size: 28px; font-weight: bold; margin-bottom: 5px;}
.cs-lbl { font-size: 12px; text-transform: uppercase; opacity: 0.8;}

/* Features */
.cmd-features { margin-bottom: 60px;}
.cf-grid { display: grid; grid-template-columns: 1fr; gap: 20px;}
.cf-card { border: 1px dashed var(--cmd-secondary); padding: 20px; transition: all 0.2s;}
.cf-card:hover { border-style: solid; background: rgba(0, 255, 0, 0.05);}
.cf-card h3 { font-size: 18px; margin-bottom: 10px; text-transform: uppercase;}
.cf-card h3::before { content: '[*] '; color: var(--cmd-accent);}
.cf-card p { font-size: 14px; opacity: 0.9;}

/* Nodes */
.cmd-nodes { margin-bottom: 60px;}
.cn-list { border: 1px solid var(--cmd-secondary); padding: 20px;}
.cn-item { display: flex; justify-content: space-between; margin-bottom: 5px; font-size: 14px;}
.cn-item:last-child { margin-bottom: 0;}
.cn-item .status { color: var(--cmd-accent); }

/* FAQ */
.cmd-faq { margin-bottom: 60px;}
.c-faq-item { margin-bottom: 20px;}
.c-fq { font-size: 16px; font-weight: bold; margin-bottom: 5px;}
.c-fq::before { content: '? '; color: var(--cmd-accent);}
.c-fa { font-size: 14px; padding-left: 20px; opacity: 0.9;}
.c-fa::before { content: '> '; color: var(--cmd-secondary);}

footer { text-align: center; padding: 20px 0; border-top: 1px dashed var(--cmd-secondary); font-size: 12px; opacity: 0.7;}
.cursor-blink { display: inline-block; width: 10px; height: 1em; background: var(--cmd-primary); animation: blink 1s step-end infinite; vertical-align: middle;}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

@media (max-width: 768px) {
    .cmd-stats { flex-direction: column; }
    .btn-cmd, .btn-cmd-alt { display: block; margin: 10px 0; width: 100%; text-align: center;}
}