/* ============================================================
   7天精通 Agent 记忆系统 — Memory Engineering Terminal
   CRT phosphor terminal aesthetic: green-on-black, monospace,
   scanlines, notched corners, glow.
   ============================================================ */

:root {
  --bg: #000000;
  --panel: #050805;
  --panel-2: #081008;
  --green: #00f48e;
  --green-hot: #00ff3c;
  --green-dim: rgba(0, 244, 142, 0.55);
  --green-faint: rgba(0, 244, 142, 0.28);
  --green-ghost: rgba(0, 244, 142, 0.1);
  --green-hairline: rgba(0, 244, 142, 0.16);
  --amber: #ffd166;
  --red: #ff5964;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "JetBrains Mono",
    "Menlo", "Consolas", "PingFang SC", "Microsoft YaHei", monospace;
  --glow: 0 0 6px rgba(0, 244, 142, 0.45), 0 0 22px rgba(0, 244, 142, 0.12);
  --notch: 14px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--green);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--green); color: #000; }

/* ---- CRT layers ------------------------------------------------ */
.crt-scanlines {
  position: fixed; inset: 0; z-index: 90; pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px, transparent 2px,
    rgba(0, 0, 0, 0.22) 3px, rgba(0, 0, 0, 0.22) 4px
  );
  mix-blend-mode: multiply;
}
.crt-vignette {
  position: fixed; inset: 0; z-index: 91; pointer-events: none;
  background: radial-gradient(ellipse at center,
    transparent 55%, rgba(0, 0, 0, 0.55) 100%);
}
.crt-flicker {
  position: fixed; inset: 0; z-index: 89; pointer-events: none;
  background: rgba(0, 244, 142, 0.012);
  animation: flicker 4s steps(60) infinite;
}
@keyframes flicker {
  0%, 100% { opacity: 0.4; } 10% { opacity: 0.9; } 22% { opacity: 0.3; }
  37% { opacity: 0.75; } 53% { opacity: 0.5; } 71% { opacity: 1; }
  84% { opacity: 0.35; }
}

/* ---- boot loader ------------------------------------------------ */
#boot {
  position: fixed; inset: 0; z-index: 200; background: #000;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s ease;
}
#boot.done { opacity: 0; pointer-events: none; }
.boot-term { width: min(640px, 88vw); font-size: 14px; }
.boot-line { white-space: pre-wrap; opacity: 0; }
.boot-line.on { opacity: 1; }
.boot-line .ok { color: var(--green-hot); text-shadow: var(--glow); }
#boot-skip {
  margin-top: 28px; background: none; border: 1px solid var(--green-faint);
  color: var(--green-dim); font-family: var(--mono); font-size: 12px;
  padding: 6px 16px; cursor: pointer; letter-spacing: 0.2em;
}
#boot-skip:hover { color: var(--green); border-color: var(--green); }

/* ---- header ------------------------------------------------------ */
header.site {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; gap: 28px;
  padding: 0 28px; height: 58px;
  background: rgba(0, 0, 0, 0.86);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid var(--green-hairline);
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  text-decoration: none; color: var(--green);
}
.brand .sig {
  font-weight: 700; letter-spacing: 0.06em; font-size: 15px;
  text-shadow: var(--glow);
}
.brand .sig b { color: var(--green-hot); }
.brand .sub {
  font-size: 10px; letter-spacing: 0.32em; color: var(--green-dim);
  text-transform: uppercase;
}
nav.main { display: flex; gap: 4px; margin-left: auto; }
nav.main a {
  color: var(--green-dim); text-decoration: none; font-size: 13px;
  padding: 6px 14px; letter-spacing: 0.14em; position: relative;
  transition: color 0.2s;
}
nav.main a::before { content: "▸ "; opacity: 0; transition: opacity 0.2s; }
nav.main a:hover { color: var(--green); }
nav.main a:hover::before { opacity: 1; }
nav.main a.active {
  color: #000; background: var(--green);
  text-shadow: none; font-weight: 700;
}
nav.main a.active::before { opacity: 0; }
.header-clock {
  font-size: 11px; color: var(--green-faint); letter-spacing: 0.1em;
  min-width: 150px; text-align: right;
}

/* ---- generic layout ---------------------------------------------- */
main { padding-top: 58px; }
.wrap { width: min(1180px, 92vw); margin: 0 auto; }
section { padding: 84px 0; }
section + section { border-top: 1px solid var(--green-hairline); }

.kicker {
  font-size: 11px; letter-spacing: 0.42em; text-transform: uppercase;
  color: var(--green-dim); margin-bottom: 14px;
}
.kicker::before { content: "// "; color: var(--green-faint); }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; text-shadow: var(--glow); }
h1 { font-size: clamp(34px, 5.4vw, 64px); letter-spacing: 0.01em; }
h2 { font-size: clamp(24px, 3.2vw, 36px); margin-bottom: 10px; }
h3 { font-size: 19px; }
.lede { color: var(--green-dim); max-width: 720px; font-size: 16px; }

.dim { color: var(--green-dim); }
.faint { color: var(--green-faint); }
.hot { color: var(--green-hot); text-shadow: var(--glow); }

/* ---- notched panel ----------------------------------------------- */
.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--green-hairline);
  padding: 26px 28px;
  clip-path: polygon(
    var(--notch) 0, 100% 0, 100% calc(100% - var(--notch)),
    calc(100% - var(--notch)) 100%, 0 100%, 0 var(--notch)
  );
}
.panel::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(var(--green-hairline), var(--green-hairline)) top left / var(--notch) 1px no-repeat,
    linear-gradient(var(--green-hairline), var(--green-hairline)) bottom right / var(--notch) 1px no-repeat;
}
.panel-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 12px; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--green-dim); margin-bottom: 18px;
}
.panel-title::after { content: ""; flex: 1; height: 1px; background: var(--green-hairline); }

/* ---- buttons / tags ---------------------------------------------- */
.btn {
  display: inline-block; font-family: var(--mono); font-size: 13px;
  letter-spacing: 0.16em; padding: 12px 26px; cursor: pointer;
  text-decoration: none; text-transform: uppercase;
  border: 1px solid var(--green); color: var(--green); background: transparent;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.btn:hover { background: var(--green); color: #000; box-shadow: var(--glow); text-shadow: none; }
.btn.solid { background: var(--green); color: #000; font-weight: 700; text-shadow: none; }
.btn.solid:hover { background: var(--green-hot); }

.tag {
  display: inline-block; font-size: 11px; letter-spacing: 0.1em;
  border: 1px solid var(--green-hairline); color: var(--green-dim);
  padding: 2px 10px; margin: 2px 4px 2px 0;
}
.tag.lit { border-color: var(--green-dim); color: var(--green); }

/* ---- terminal block / code --------------------------------------- */
.term {
  background: #020402; border: 1px solid var(--green-hairline);
  font-size: 13px; line-height: 1.7; padding: 18px 20px;
  overflow-x: auto; position: relative;
}
.term .tbar {
  display: flex; gap: 8px; margin: -18px -20px 14px;
  padding: 8px 16px; border-bottom: 1px solid var(--green-hairline);
  color: var(--green-faint); font-size: 11px; letter-spacing: 0.2em;
}
pre.code { font-family: var(--mono); font-size: 13px; line-height: 1.7; overflow-x: auto; }
.code .k { color: var(--green-hot); }       /* keyword */
.code .s { color: var(--amber); }           /* string  */
.code .c { color: var(--green-faint); }     /* comment */
.code .f { color: var(--green); text-shadow: var(--glow); }

/* ---- cursor ------------------------------------------------------- */
.cursor::after {
  content: "█"; color: var(--green-hot);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---- footer -------------------------------------------------------- */
footer.site {
  border-top: 1px solid var(--green-hairline);
  padding: 44px 0 60px; color: var(--green-faint); font-size: 12px;
  letter-spacing: 0.08em;
}
footer.site .cols { display: flex; flex-wrap: wrap; gap: 40px; }
footer.site a { color: var(--green-dim); text-decoration: none; }
footer.site a:hover { color: var(--green); }

/* ---- responsive ---------------------------------------------------- */
@media (max-width: 860px) {
  nav.main { display: none; }
  .header-clock { display: none; }
  section { padding: 60px 0; }
}
#nav-toggle {
  display: none; margin-left: auto; background: none;
  border: 1px solid var(--green-faint); color: var(--green);
  font-family: var(--mono); font-size: 12px; padding: 6px 12px;
  letter-spacing: 0.2em; cursor: pointer;
}
@media (max-width: 860px) { #nav-toggle { display: block; } }
#mobile-nav {
  display: none; position: fixed; top: 58px; left: 0; right: 0; z-index: 99;
  background: rgba(0,0,0,0.96); border-bottom: 1px solid var(--green-hairline);
  flex-direction: column; padding: 10px 0;
}
#mobile-nav.open { display: flex; }
#mobile-nav a {
  color: var(--green-dim); text-decoration: none; padding: 12px 28px;
  font-size: 14px; letter-spacing: 0.2em;
}
#mobile-nav a.active { color: var(--green-hot); }