/* ============================================================
   灵环 loopling · 设计系统「墨与环光」（与灵枢同源）
   与灵壳同一套墨底、纸白、宋体标题与等宽细节；
   强调色为代码绿，辅以黑客帝国的字雨与攻壳的 HUD 细线。
   零外部依赖。
   ============================================================ */
:root {
  --ink-0: #0a0b0e; --ink-1: #0f1116; --ink-2: #14171f; --ink-3: #1b1f2a;
  --paper: #ece9e1; --paper-soft: #c7c4bb; --muted: #8b8e96; --faint: #5d616b;
  --accent: #6fe3c4; --accent-deep: #2fb89e; --matrix: #3dff9a;
  --accent-dim: rgba(111, 227, 196, 0.08); --accent-line: rgba(111, 227, 196, 0.32);
  --ok: #58c08a; --warn: #e0a83e; --bad: #e06c5b; --violet: #9d8cff;
  --hairline: rgba(236, 233, 225, 0.08); --hairline-strong: rgba(236, 233, 225, 0.16);
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", "SF Mono", Consolas, "Courier New", monospace;
  --radius: 10px; --radius-lg: 16px; --max: 1160px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; min-height: 100vh; color: var(--paper); background: var(--ink-0);
  font-family: var(--font-body); font-size: 15px; line-height: 1.75; -webkit-font-smoothing: antialiased;
}
body::before { /* 坐标纸网格，向下渐隐 */
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background: linear-gradient(rgba(111,227,196,.022) 1px, transparent 1px), linear-gradient(90deg, rgba(111,227,196,.022) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 55%); -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 55%);
}
body::after { /* 极淡扫描线 */
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0; opacity: .35;
  background: repeating-linear-gradient(0deg, rgba(0,0,0,.18) 0 1px, transparent 1px 3px);
}
body > * { position: relative; z-index: 1; }
::selection { background: var(--accent); color: var(--ink-0); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
.shell { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }
.mono { font-family: var(--font-mono); }
.kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em; text-transform: lowercase; color: var(--accent); }
.kicker::before { content: "// "; color: var(--faint); }
.muted { color: var(--muted); }

/* ---------- 顶栏 ---------- */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px 0 16px; border-bottom: 1px solid var(--hairline); }
.brand { display: flex; align-items: center; gap: 12px; color: inherit; }
.brand:hover { text-decoration: none; }
.brand img, .brand svg { width: 38px; height: 38px; filter: drop-shadow(0 0 8px rgba(111,227,196,.35)); }
.brand-name { font-family: var(--font-display); font-size: 21px; letter-spacing: .18em; }
.brand-en { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .38em; color: var(--muted); display: block; margin-top: -4px; }
.nav { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.nav a { color: var(--paper-soft); }
.nav a:hover { color: var(--accent); text-decoration: none; }
.nav .primary { color: var(--ink-0); background: var(--accent); padding: 7px 16px; border-radius: 999px; font-weight: 600; }
.nav .primary:hover { background: var(--matrix); color: var(--ink-0); }

/* ---------- 按钮 / 表单 ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--hairline-strong); color: var(--paper);
  background: transparent; padding: 11px 22px; border-radius: 999px; font: inherit; font-size: 14.5px; cursor: pointer; transition: .18s; }
.btn:hover { border-color: var(--accent-line); color: var(--accent); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--ink-0); font-weight: 600; box-shadow: 0 0 24px rgba(111,227,196,.18); }
.btn-primary:hover { background: var(--matrix); border-color: var(--matrix); color: var(--ink-0); box-shadow: 0 0 34px rgba(61,255,154,.3); }
.btn-small { padding: 6px 13px; font-size: 13px; }
.btn-danger:hover { border-color: rgba(224,108,91,.5); color: var(--bad); }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
input, textarea, select { width: 100%; background: var(--ink-1); border: 1px solid var(--hairline-strong); color: var(--paper);
  border-radius: 8px; padding: 10px 12px; font: inherit; font-size: 14px; outline: none; transition: border-color .15s; }
input:focus, textarea:focus, select:focus { border-color: var(--accent-line); box-shadow: 0 0 0 3px var(--accent-dim); }
label { display: block; font-size: 13px; color: var(--muted); margin: 14px 0 6px; }
.notice { font-size: 13.5px; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--hairline); background: var(--ink-1); }
.notice.bad { border-color: rgba(224,108,91,.35); color: #f0a497; }
.notice.ok { border-color: rgba(88,192,138,.35); color: #9fe0bb; }

/* ---------- 首页 ---------- */
.hero { display: grid; grid-template-columns: 1.02fr .98fr; gap: 40px; align-items: center; padding: 64px 0 40px; min-height: 620px; }
.hero h1 { font-family: var(--font-display); font-weight: 600; font-size: clamp(34px, 4.6vw, 56px); line-height: 1.22; margin: 18px 0 20px; letter-spacing: .02em; }
.hero h1 em { white-space: nowrap; font-style: normal; color: var(--accent); text-shadow: 0 0 28px rgba(111,227,196,.35); }
.hero .lead { font-size: 16.5px; color: var(--paper-soft); max-width: 34em; }
.hero .cta { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.epigraph { font-family: var(--font-display); color: var(--muted); font-size: 14px; letter-spacing: .12em; border-left: 2px solid var(--accent-line); padding-left: 14px; }
.hero-visual { position: relative; aspect-ratio: 1 / 1; border: 1px solid var(--hairline); border-radius: var(--radius-lg);
  background: radial-gradient(circle at 50% 50%, rgba(111,227,196,.07), transparent 62%), var(--ink-1); overflow: hidden; }
.hero-visual canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hud { position: absolute; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em; color: var(--accent); opacity: .7; pointer-events: none; }
.hud.tl { top: 14px; left: 16px; } .hud.tr { top: 14px; right: 16px; text-align: right; }
.hud.bl { bottom: 14px; left: 16px; } .hud.br { bottom: 14px; right: 16px; text-align: right; }
.corner { position: absolute; width: 18px; height: 18px; border-color: var(--accent-line); border-style: solid; pointer-events: none; }
.corner.a { top: 8px; left: 8px; border-width: 1px 0 0 1px; } .corner.b { top: 8px; right: 8px; border-width: 1px 1px 0 0; }
.corner.c { bottom: 8px; left: 8px; border-width: 0 0 1px 1px; } .corner.d { bottom: 8px; right: 8px; border-width: 0 1px 1px 0; }
#rain { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .16; pointer-events: none; }

section.block { padding: 72px 0; border-top: 1px solid var(--hairline); }
.block h2 { font-family: var(--font-display); font-weight: 600; font-size: clamp(26px, 3vw, 36px); margin: 12px 0 14px; letter-spacing: .03em; }
.block .intro { color: var(--paper-soft); max-width: 44em; }
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; }
.pillar { border: 1px solid var(--hairline); border-radius: var(--radius-lg); padding: 26px; background: linear-gradient(180deg, var(--ink-1), transparent); position: relative; overflow: hidden; }
.pillar .glyph { font-family: var(--font-display); font-size: 54px; line-height: 1; color: transparent; -webkit-text-stroke: 1px var(--accent-line); position: absolute; right: 18px; top: 14px; }
.pillar h3 { font-family: var(--font-display); font-size: 20px; margin: 10px 0 8px; }
.pillar p { color: var(--paper-soft); font-size: 14.5px; margin: 0; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 34px; counter-reset: step; }
.step { padding: 22px 22px 22px 70px; position: relative; border: 1px solid var(--hairline); border-radius: var(--radius); }
.step::before { counter-increment: step; content: "0" counter(step); position: absolute; left: 20px; top: 20px; font-family: var(--font-mono); font-size: 22px; color: var(--accent); }
.step h4 { margin: 0 0 6px; font-size: 16px; } .step p { margin: 0; color: var(--muted); font-size: 14px; }
.terminal { border: 1px solid var(--hairline-strong); border-radius: 12px; background: #07080a; overflow: hidden; box-shadow: 0 30px 80px rgba(0,0,0,.45); }
.terminal .bar { display: flex; gap: 7px; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--hairline); font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
.terminal .bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--ink-3); display: inline-block; }
.terminal pre { margin: 0; padding: 18px 20px; font-family: var(--font-mono); font-size: 13px; line-height: 1.7; color: #b9f5dd; white-space: pre-wrap; }
.terminal .c { color: var(--faint); } .terminal .g { color: var(--matrix); } .terminal .w { color: var(--paper); } .terminal .y { color: var(--warn); }
.cursor { display: inline-block; width: .6em; height: 1.1em; background: var(--accent); vertical-align: -2px; animation: blink 1.05s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: center; margin-top: 30px; }
.poem { font-family: var(--font-display); font-size: 19px; line-height: 2.1; color: var(--paper-soft); letter-spacing: .08em; }
.poem b { color: var(--accent); font-weight: 600; }
.series { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); border-radius: var(--radius-lg); overflow: hidden; margin-top: 30px; }
.series div { background: var(--ink-0); padding: 26px; }
.series strong { font-family: var(--font-display); font-size: 24px; letter-spacing: .2em; display: block; }
.series span { font-family: var(--font-mono); font-size: 11px; color: var(--muted); letter-spacing: .2em; }
.series p { color: var(--paper-soft); font-size: 14px; margin: 10px 0 0; }
.series .here { background: linear-gradient(180deg, rgba(111,227,196,.08), var(--ink-0)); }
.series .here strong { color: var(--accent); }
.bounds { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 30px; margin-top: 26px; }
.bounds p { margin: 0; color: var(--paper-soft); font-size: 14px; padding-left: 18px; position: relative; }
.bounds p::before { content: "—"; position: absolute; left: 0; color: var(--accent); }
.download-card { display: flex; justify-content: space-between; align-items: center; gap: 30px; border: 1px solid var(--accent-line); border-radius: var(--radius-lg);
  padding: 34px; background: radial-gradient(circle at 90% 10%, rgba(111,227,196,.12), transparent 50%), var(--ink-1); margin-top: 30px; flex-wrap: wrap; }
.download-card h3 { font-family: var(--font-display); font-size: 24px; margin: 0 0 6px; }
.stats { display: flex; gap: 34px; margin-top: 36px; font-family: var(--font-mono); flex-wrap: wrap; }
.stats b { font-size: 26px; color: var(--accent); display: block; font-weight: 500; }
.stats span { font-size: 11.5px; color: var(--muted); letter-spacing: .14em; }
footer { border-top: 1px solid var(--hairline); padding: 34px 0 44px; color: var(--faint); font-size: 13px; }
footer .shell { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

/* ---------- 登录 ---------- */
.auth-wrap { min-height: calc(100vh - 90px); display: grid; place-items: center; padding: 40px 0; position: relative; }
.watermark { position: absolute; font-family: var(--font-display); font-size: min(46vw, 520px); line-height: 1; color: transparent;
  -webkit-text-stroke: 1px rgba(111,227,196,.08); user-select: none; pointer-events: none; left: 50%; top: 50%; transform: translate(-50%, -52%); }
.card { width: min(420px, calc(100vw - 40px)); border: 1px solid var(--hairline-strong); border-radius: var(--radius-lg); padding: 34px; background: rgba(15,17,22,.88); backdrop-filter: blur(6px); position: relative; }
.card h1 { font-family: var(--font-display); font-weight: 600; font-size: 28px; margin: 6px 0 4px; letter-spacing: .1em; }
.tabs { display: flex; gap: 6px; margin: 22px 0 6px; border-bottom: 1px solid var(--hairline); }
.tabs button { background: none; border: 0; color: var(--muted); padding: 8px 12px; font: inherit; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs button.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- 控制台 ---------- */
.console { display: grid; grid-template-columns: 1fr 380px; gap: 0; height: calc(100vh - 75px); border-top: 1px solid var(--hairline); }
.console-top { display: flex; align-items: center; gap: 14px; }
.console-top select { width: auto; min-width: 220px; padding: 7px 10px; }
.map { position: relative; overflow: hidden; background: radial-gradient(circle at 50% 48%, rgba(111,227,196,.06), transparent 60%), #08090c; }
.map canvas { position: absolute; inset: 0; width: 100%; height: 100%; cursor: grab; }
.map .legend { position: absolute; left: 18px; bottom: 16px; font-family: var(--font-mono); font-size: 11.5px; color: var(--muted); display: grid; gap: 4px; pointer-events: none; }
.legend i { display: inline-block; width: 26px; height: 0; margin-right: 8px; vertical-align: middle; border-top: 2px solid; }
.map .title { position: absolute; left: 18px; top: 16px; pointer-events: none; }
.map .title h2 { font-family: var(--font-display); margin: 0; font-size: 22px; letter-spacing: .08em; font-weight: 600; }
.map .title p { margin: 0; font-family: var(--font-mono); font-size: 11.5px; color: var(--muted); letter-spacing: .08em; }
.side { border-left: 1px solid var(--hairline); background: var(--ink-1); overflow-y: auto; }
.side section { padding: 18px 20px; border-bottom: 1px solid var(--hairline); }
.side h3 { font-family: var(--font-mono); font-size: 12px; letter-spacing: .16em; color: var(--accent); margin: 0 0 10px; font-weight: 500; }
.side h4 { font-family: var(--font-display); font-size: 19px; margin: 0 0 4px; }
.kv { display: grid; grid-template-columns: 88px 1fr; gap: 4px 10px; font-size: 13px; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; word-break: break-all; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.chip { font-family: var(--font-mono); font-size: 11.5px; border: 1px solid var(--hairline-strong); border-radius: 999px; padding: 1px 9px; color: var(--paper-soft); }
.chip.on { border-color: rgba(88,192,138,.45); color: var(--ok); } .chip.off { color: var(--faint); }
.chip.direct { border-color: rgba(61,255,154,.5); color: var(--matrix); } .chip.ssh { border-color: var(--accent-line); color: var(--accent); }
.chip.negotiating { border-color: rgba(157,140,255,.45); color: var(--violet); } .chip.blocked { border-color: rgba(224,108,91,.45); color: var(--bad); }
.list { display: grid; gap: 8px; }
.row { border: 1px solid var(--hairline); border-radius: 8px; padding: 9px 11px; font-size: 13px; background: var(--ink-0); }
.row .head { display: flex; justify-content: space-between; gap: 8px; align-items: center; }
.row pre { white-space: pre-wrap; font-family: var(--font-mono); font-size: 12px; color: var(--paper-soft); margin: 8px 0 0; max-height: 260px; overflow: auto; }
.row .meta { font-family: var(--font-mono); font-size: 11px; color: var(--faint); }
.entries { font-family: var(--font-mono); font-size: 12px; color: var(--paper-soft); max-height: 150px; overflow: auto; margin-top: 8px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.seg { display: inline-flex; border: 1px solid var(--hairline-strong); border-radius: 999px; overflow: hidden; margin-top: 8px; }
.seg button { background: none; border: 0; color: var(--muted); padding: 5px 12px; font: inherit; font-size: 12.5px; cursor: pointer; }
.seg button.active { background: var(--accent-dim); color: var(--accent); }
.empty-map { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; pointer-events: none; }
.empty-map div { max-width: 360px; color: var(--muted); }
.empty-map strong { font-family: var(--font-display); font-size: 22px; color: var(--paper); display: block; margin-bottom: 8px; }
.toast { position: fixed; right: 24px; bottom: 24px; z-index: 50; max-width: 360px; }

/* ---------- 文档 ---------- */
.doc { display: grid; grid-template-columns: 220px 1fr; gap: 40px; padding: 40px 0 80px; }
.doc nav { position: sticky; top: 20px; align-self: start; display: grid; gap: 6px; font-size: 14px; }
.doc nav a { color: var(--muted); } .doc nav a:hover { color: var(--accent); }
.doc h2 { font-family: var(--font-display); font-weight: 600; font-size: 26px; margin: 34px 0 10px; }
.doc h2:first-child { margin-top: 0; }
.doc code { font-family: var(--font-mono); font-size: 13px; background: var(--ink-2); padding: 1px 6px; border-radius: 4px; color: #b9f5dd; }
.doc table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 12px 0; }
.doc td, .doc th { border: 1px solid var(--hairline); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc th { color: var(--accent); font-weight: 500; font-family: var(--font-mono); font-size: 12.5px; }

@media (max-width: 920px) {
  .hero, .split { grid-template-columns: 1fr; }
  .pillars, .steps, .series, .bounds { grid-template-columns: 1fr; }
  .console { grid-template-columns: 1fr; height: auto; }
  .map { height: 64vh; }
  .side { border-left: 0; }
  .doc { grid-template-columns: 1fr; } .doc nav { position: static; }
  .nav a:not(.primary) { display: none; }
}