/* Cloudflare 全景導覽｜樣式
   風格：地鐵路線圖＋技術手冊。紙感底、墨色字、Cloudflare 橘為主色，每一層用一條路線色。 */

:root {
  --paper: #f4efe4;
  --paper-2: #ebe3d2;
  --card: #fbf8f1;
  --ink: #1c1b18;
  --ink-2: #47433b;
  --ink-3: #777062;
  --rule: #d6ccb6;
  --orange: #f38020;
  --orange-ink: #a94f06;
  --ok: #16875a;
  --bad: #c8362e;
  --warn: #b7791f;

  --l-entry: #f38020;
  --l-compute: #2f5bd3;
  --l-data: #16875a;
  --l-async: #9a3c8e;
  --l-ai: #0b8793;
  --l-sec: #c8362e;

  --shadow: 4px 4px 0 var(--ink);
  --radius: 14px;
  --serif: "Noto Serif TC", "Songti TC", serif;
  --sans: "Noto Sans TC", "PingFang TC", "Heiti TC", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16150f;
    --paper-2: #211f18;
    --card: #1d1c16;
    --ink: #f1ebdd;
    --ink-2: #d2cab9;
    --ink-3: #9d9585;
    --rule: #3b382e;
    --orange: #ff9442;
    --orange-ink: #ffab66;
    --ok: #3dbe87;
    --bad: #f06a5f;
    --warn: #e2a84a;
    --l-entry: #ff9442;
    --l-compute: #7496ff;
    --l-data: #3dbe87;
    --l-async: #d67fc9;
    --l-ai: #3cc3d0;
    --l-sec: #f06a5f;
    --shadow: 4px 4px 0 #000;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #16150f;
  --paper-2: #211f18;
  --card: #1d1c16;
  --ink: #f1ebdd;
  --ink-2: #d2cab9;
  --ink-3: #9d9585;
  --rule: #3b382e;
  --orange: #ff9442;
  --orange-ink: #ffab66;
  --ok: #3dbe87;
  --bad: #f06a5f;
  --warn: #e2a84a;
  --l-entry: #ff9442;
  --l-compute: #7496ff;
  --l-data: #3dbe87;
  --l-async: #d67fc9;
  --l-ai: #3cc3d0;
  --l-sec: #f06a5f;
  --shadow: 4px 4px 0 #000;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--rule) 38%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--rule) 38%, transparent) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: .01em;
  overflow-x: hidden;
}

a { color: var(--orange-ink); text-underline-offset: 3px; }
a:hover { color: var(--orange); }
code, kbd, .mono { font-family: var(--mono); font-size: .88em; }
:not(pre) > code { background: var(--paper-2); padding: .1em .38em; border-radius: 5px; border: 1px solid var(--rule); word-break: break-word; }
strong { font-weight: 700; }
img, svg { max-width: 100%; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }

/* ---------- 頂部列 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 20px;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1.5px solid var(--ink);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; color: var(--ink); font-size: 15px; }
.brand-mark { width: 30px; height: 30px; border-radius: 50%; background: var(--orange); border: 1.5px solid var(--ink); display: grid; place-items: center; font-family: var(--mono); font-size: 12px; color: #1c1b18; font-weight: 700; }
.topbar .spacer { flex: 1; }
.icon-btn { border: 1.5px solid var(--ink); background: var(--card); border-radius: 999px; padding: 5px 14px; cursor: pointer; font-size: 14px; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; flex-shrink: 0; }
.icon-btn:hover { background: var(--paper-2); }
.progress { position: absolute; left: 0; bottom: -1.5px; height: 3px; background: var(--orange); width: 0; transition: width .1s linear; }
.menu-btn { display: none; }

/* ---------- 版面 ---------- */
.layout { display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 48px; max-width: 1240px; margin: 0 auto; padding: 0 28px; }
.sidenav { position: sticky; top: 74px; align-self: start; max-height: calc(100vh - 90px); overflow-y: auto; padding: 28px 0 40px; scrollbar-width: thin; }
.sidenav h2 { font-family: var(--mono); font-size: 12px; letter-spacing: .12em; color: var(--ink-3); margin: 0 0 12px; font-weight: 500; }
.nav-line { margin: 0 0 14px; }
.nav-line > a { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--ink); text-decoration: none; font-size: 14.5px; padding: 3px 0; }
.nav-line > a .sw { width: 22px; height: 6px; border-radius: 3px; background: var(--c, var(--ink)); flex: none; }
.nav-line ul { list-style: none; margin: 2px 0 0 10px; padding: 0 0 0 20px; border-left: 2px dotted var(--rule); }
.nav-line li a { display: block; font-size: 13.5px; color: var(--ink-2); text-decoration: none; padding: 2px 0; line-height: 1.5; }
.nav-line li a:hover, .nav-line > a:hover { color: var(--orange-ink); }
.nav-line a.active { color: var(--orange-ink); }
.nav-line li a.active::before { content: "● "; font-size: 9px; vertical-align: 2px; }

main { min-width: 0; padding-bottom: 80px; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 24px; }
.eyebrow { font-family: var(--mono); font-size: 13px; letter-spacing: .14em; color: var(--ink-3); text-transform: uppercase; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); display: inline-block; }
.hero h1 { font-family: var(--serif); font-weight: 900; font-size: clamp(2.3rem, 6.2vw, 4.6rem); line-height: 1.12; margin: 14px 0 18px; letter-spacing: -.01em; }
.hero h1 .hl { background: linear-gradient(transparent 62%, color-mix(in srgb, var(--orange) 45%, transparent) 62%); padding: 0 .08em; }
.hero .lede { font-size: clamp(1.05rem, 2vw, 1.22rem); color: var(--ink-2); max-width: 44em; margin: 0; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; border: 1.5px solid var(--ink); border-radius: 999px; padding: 2px 12px; background: var(--card); font-family: var(--mono); }

/* 分層全景圖 */
.stack { margin: 34px 0 10px; position: relative; }
.stack-toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.layer { position: relative; display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 16px; align-items: center; padding: 14px 16px; margin-bottom: 10px; background: var(--card); border: 1.5px solid var(--ink); border-radius: var(--radius); transition: transform .25s, box-shadow .25s; }
.layer::after { content: ""; position: absolute; left: 50%; bottom: -11px; width: 2px; height: 10px; background: var(--ink); }
.layer:last-child::after { display: none; }
.layer.lit { transform: translate(-3px, -3px); box-shadow: 6px 6px 0 var(--c); }
.layer-name { font-weight: 700; font-size: 15px; line-height: 1.4; }
.layer-name small { display: block; font-family: var(--mono); font-weight: 400; font-size: 11.5px; color: var(--ink-3); letter-spacing: .06em; }
.layer-name .bar { display: block; width: 36px; height: 6px; border-radius: 3px; background: var(--c); margin-bottom: 6px; }
.layer-items { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { border: 1.5px solid var(--c, var(--ink)); background: color-mix(in srgb, var(--c, var(--ink)) 9%, var(--card)); color: var(--ink); border-radius: 999px; padding: 4px 13px; font-size: 14px; cursor: pointer; line-height: 1.5; transition: background .15s, transform .15s; }
.pill:hover, .pill[aria-pressed="true"] { background: var(--c, var(--ink)); color: #fff; }
:root[data-theme="dark"] .pill:hover, :root[data-theme="dark"] .pill[aria-pressed="true"] { color: #111; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .pill:hover, :root:not([data-theme="light"]) .pill[aria-pressed="true"] { color: #111; } }
.pill.ext { border-style: dashed; }
.stack-detail { min-height: 92px; border: 1.5px dashed var(--ink-3); border-radius: var(--radius); padding: 14px 18px; margin-top: 6px; background: color-mix(in srgb, var(--card) 70%, transparent); }
.stack-detail h4 { margin: 0 0 4px; font-size: 17px; }
.stack-detail p { margin: 0; color: var(--ink-2); }
.stack-detail .go { font-size: 14px; }
.packet { position: absolute; width: 18px; height: 18px; border-radius: 50%; background: var(--orange); border: 2px solid var(--ink); left: calc(50% - 9px); top: -9px; opacity: 0; z-index: 3; pointer-events: none; box-shadow: 0 0 0 6px color-mix(in srgb, var(--orange) 25%, transparent); }

/* ---------- 章節 ---------- */
.chapter { padding: 64px 0 8px; }
.ch-head { margin-bottom: 26px; }
.ch-code { font-family: var(--mono); font-size: 13px; letter-spacing: .14em; color: var(--ink-3); display: flex; align-items: center; gap: 12px; }
.ch-code::after { content: ""; flex: 1; height: 6px; border-radius: 3px; background: var(--c, var(--orange)); max-width: 220px; }
.ch-head h2 { font-family: var(--serif); font-weight: 900; font-size: clamp(1.8rem, 4.2vw, 2.7rem); line-height: 1.25; margin: 10px 0 12px; }
.ch-head .lede { font-size: 1.08rem; color: var(--ink-2); margin: 0; max-width: 46em; }

.station { margin: 42px 0 0; }
.st-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.st-dot { width: 46px; height: 46px; border-radius: 50%; border: 5px solid var(--c, var(--orange)); background: var(--card); display: grid; place-items: center; font-family: var(--mono); font-weight: 700; font-size: 13px; flex: none; }
.st-head h3 { font-family: var(--serif); font-weight: 900; font-size: clamp(1.4rem, 3vw, 1.85rem); margin: 0; line-height: 1.3; }
.st-tag { font-size: 13.5px; padding: 2px 12px; border-radius: 999px; background: var(--paper-2); color: var(--ink-2); border: 1px solid var(--rule); }
.station > p, .prose p { margin: .7em 0; max-width: 46em; }
h4 { font-size: 1.08rem; margin: 1.6em 0 .5em; }

.one-liner { font-family: var(--serif); font-size: clamp(1.15rem, 2.4vw, 1.4rem); font-weight: 700; line-height: 1.6; margin: 18px 0; padding: 18px 22px; background: var(--card); border-radius: var(--radius); border: 1.5px solid var(--rule); position: relative; max-width: 46em; }
.one-liner::before { content: "「"; color: var(--orange); font-size: 1.6em; line-height: 0; position: relative; top: .28em; margin-right: 2px; }
.one-liner::after { content: "」"; color: var(--orange); font-size: 1.6em; line-height: 0; position: relative; top: .28em; }

.fit { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 16px 0; }
.fit > div { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 14px 18px; }
.fit h5 { margin: 0 0 6px; font-size: 14.5px; display: flex; align-items: center; gap: 8px; }
.fit h5 .mk { width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-size: 12px; font-weight: 700; }
.fit .yes .mk { background: var(--ok); }
.fit .no .mk { background: var(--bad); }
.fit ul { margin: 0; padding-left: 1.2em; font-size: 15px; line-height: 1.75; }

.note { background: var(--paper-2); border-radius: var(--radius); padding: 14px 18px; margin: 16px 0; font-size: 15.5px; max-width: 48em; }
.note b.lbl { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--orange-ink); display: block; margin-bottom: 2px; }
.note.warn b.lbl { color: var(--bad); }
.note p { margin: .3em 0; }

.flow { list-style: none; padding: 0; margin: 16px 0; display: flex; flex-direction: column; gap: 0; max-width: 40em; }
.flow li { position: relative; padding: 8px 14px 8px 40px; background: var(--card); border: 1px solid var(--rule); border-radius: 10px; font-size: 15px; }
.flow li + li { margin-top: 18px; }
.flow li + li::before { content: "↓"; position: absolute; top: -20px; left: 16px; color: var(--ink-3); font-size: 14px; line-height: 1; }
.flow li .n { position: absolute; left: 10px; top: 9px; width: 20px; height: 20px; border-radius: 50%; background: var(--ink); color: var(--paper); font-family: var(--mono); font-size: 11px; display: grid; place-items: center; }

/* 表格 */
.tbl-wrap { overflow-x: auto; margin: 16px 0; border: 1.5px solid var(--ink); border-radius: var(--radius); background: var(--card); }
table { border-collapse: collapse; width: 100%; font-size: 15px; line-height: 1.6; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-family: var(--mono); font-size: 12.5px; letter-spacing: .06em; font-weight: 600; color: var(--ink-2); background: var(--paper-2); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td .y { color: var(--ok); font-weight: 700; }
td .n { color: var(--bad); font-weight: 700; }

/* 票卡（一句話記法） */
.tickets { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin: 20px 0; }
.ticket { background: var(--card); border: 1.5px solid var(--ink); border-radius: 12px; padding: 12px 14px; display: flex; gap: 12px; align-items: center; text-decoration: none; color: var(--ink); transition: transform .15s, box-shadow .15s; }
.ticket:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--c); color: var(--ink); }
.ticket .tk { width: 44px; height: 44px; border-radius: 50%; border: 4px solid var(--c); display: grid; place-items: center; font-family: var(--mono); font-weight: 700; font-size: 12.5px; flex: none; }
.ticket b { display: block; font-size: 15px; line-height: 1.35; }
.ticket span { font-size: 13.5px; color: var(--ink-2); line-height: 1.45; display: block; }

/* ---------- 實驗台（互動區） ---------- */
.lab { position: relative; background: var(--card); border: 1.5px solid var(--ink); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px 22px 20px; margin: 28px 0 22px; }
.lab-tag { position: absolute; top: -13px; left: 18px; background: var(--orange); color: #1c1b18; border: 1.5px solid var(--ink); border-radius: 999px; padding: 0 12px; font-size: 12.5px; font-family: var(--mono); font-weight: 600; letter-spacing: .06em; line-height: 22px; }
.lab h4 { margin: 4px 0 4px; font-size: 1.12rem; }
.lab .sub { color: var(--ink-2); font-size: 15px; margin: 0 0 14px; }
.controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 12px 0; }
.btn { border: 1.5px solid var(--ink); background: var(--ink); color: var(--paper); border-radius: 999px; padding: 7px 18px; cursor: pointer; font-size: 15px; font-weight: 500; transition: transform .1s; line-height: 1.4; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.orange { background: var(--orange); color: #1c1b18; }
.btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }
.seg { display: inline-flex; border: 1.5px solid var(--ink); border-radius: 999px; overflow: hidden; background: var(--paper); }
.seg button { border: 0; background: transparent; padding: 6px 16px; cursor: pointer; font-size: 14.5px; }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; cursor: pointer; user-select: none; }
.check input { width: 18px; height: 18px; accent-color: var(--orange); }
.log { font-family: var(--mono); font-size: 13px; line-height: 1.65; background: #15140f; color: #e9e2d0; border-radius: 10px; padding: 12px 14px; min-height: 120px; max-height: 260px; overflow-y: auto; margin-top: 12px; white-space: pre-wrap; word-break: break-word; }
.log .ok { color: #6ee0a6; }
.log .bad { color: #ff8a80; }
.log .warn { color: #f7c46c; }
.log .dim { color: #9d9585; }
.log .hi { color: #ffab66; }
.legend { font-size: 13px; color: var(--ink-3); margin-top: 8px; }

/* 小工具共用 */
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.panel { border: 1px solid var(--rule); border-radius: 12px; padding: 14px 16px; background: var(--paper); }
.panel h5 { margin: 0 0 8px; font-size: 14.5px; }
.meter { font-family: var(--mono); font-size: 26px; font-weight: 700; }
.meter small { font-size: 13px; font-weight: 400; color: var(--ink-3); }
.timeline { position: relative; height: 38px; border-radius: 8px; background: var(--paper-2); overflow: hidden; margin: 8px 0; }
.timeline .fill { position: absolute; inset: 0 auto 0 0; width: 0; background: color-mix(in srgb, var(--bad) 30%, transparent); }
.timeline .tick { position: absolute; top: 6px; bottom: 6px; width: 4px; border-radius: 2px; background: var(--ok); }
.timeline .cursor { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--ink); left: 0; }

/* 延遲長條 */
.lat-row { display: grid; grid-template-columns: 92px minmax(0, 1fr) 70px; gap: 10px; align-items: center; margin: 9px 0; font-size: 14.5px; }
.lat-bar { height: 16px; border-radius: 8px; background: var(--paper-2); overflow: hidden; }
.lat-bar i { display: block; height: 100%; border-radius: 8px; background: var(--l-compute); width: 0; transition: width .7s cubic-bezier(.2,.8,.2,1), background .3s; }
.lat-ms { font-family: var(--mono); font-size: 13.5px; text-align: right; }

/* 假 dashboard（mock） */
.mock { border: 1.5px solid var(--ink); border-radius: 12px; overflow: hidden; background: var(--card); margin: 12px 0; }
.mock-bar { display: flex; align-items: center; gap: 8px; padding: 8px 12px; background: var(--paper-2); border-bottom: 1px solid var(--rule); font-size: 13px; font-family: var(--mono); color: var(--ink-2); flex-wrap: wrap; }
.mock-bar .dots { display: inline-flex; gap: 5px; margin-right: 6px; }
.mock-bar .dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--rule); display: block; }
.mock-bar .url { flex: 1; min-width: 120px; background: var(--card); border: 1px solid var(--rule); border-radius: 6px; padding: 2px 10px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mock-body { padding: 14px 16px; }
.mock table { font-size: 14px; }
.mock td, .mock th { padding: 8px 10px; }
.cloud-toggle { display: inline-flex; align-items: center; gap: 8px; border: 0; background: none; cursor: pointer; padding: 2px 0; font-size: 13.5px; }
.cloud-toggle svg { width: 34px; height: 22px; }
.cloud-toggle .cl { fill: var(--rule); transition: fill .2s; }
.cloud-toggle[aria-pressed="true"] .cl { fill: var(--orange); }
.visible-ip { font-family: var(--mono); font-size: 14px; padding: 10px 12px; border-radius: 8px; margin-top: 10px; }
.visible-ip.safe { background: color-mix(in srgb, var(--ok) 14%, transparent); }
.visible-ip.exposed { background: color-mix(in srgb, var(--bad) 14%, transparent); }

/* 終端機 mock */
.term { background: #121210; color: #e9e2d0; border-radius: 12px; border: 1.5px solid var(--ink); overflow: hidden; margin: 12px 0; }
.term-bar { display: flex; gap: 6px; padding: 9px 12px; background: #23221c; align-items: center; }
.term-bar i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.term-bar i:nth-child(1) { background: #ff5f57; } .term-bar i:nth-child(2) { background: #febc2e; } .term-bar i:nth-child(3) { background: #28c840; }
.term-bar span { margin-left: 8px; font-family: var(--mono); font-size: 12px; color: #9d9585; }
.term pre { margin: 0; padding: 14px 16px; font-family: var(--mono); font-size: 13px; line-height: 1.7; min-height: 150px; white-space: pre-wrap; word-break: break-word; }
.term .p { color: #6ee0a6; } .term .o { color: #ffab66; } .term .d { color: #9d9585; } .term .b { color: #8fb4ff; }
.code { background: #121210; color: #e9e2d0; border-radius: 12px; border: 1.5px solid var(--ink); padding: 14px 16px; font-family: var(--mono); font-size: 13px; line-height: 1.7; overflow-x: auto; margin: 12px 0; white-space: pre; }
.code .c { color: #8a8375; } .code .k { color: #ffab66; } .code .s { color: #9be3b8; } .code .v { color: #8fb4ff; }

/* 選型小幫手 */
.picker-opts { display: flex; flex-wrap: wrap; gap: 8px; }
.picker-opts .pill { --c: var(--l-data); }
.pick-result > .legend { grid-column: 1 / -1; margin: 0; }
.pick-result { margin-top: 16px; display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 18px; align-items: start; border-top: 1.5px dashed var(--rule); padding-top: 16px; min-height: 120px; }
.pick-badge { width: 110px; height: 110px; border-radius: 50%; border: 8px solid var(--c, var(--l-data)); display: grid; place-items: center; text-align: center; font-family: var(--mono); font-weight: 700; font-size: 17px; line-height: 1.2; padding: 6px; background: var(--paper); }
.pick-body h5 { margin: 0 0 6px; font-size: 1.1rem; }
.pick-body dl { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 4px 10px; margin: 8px 0 0; font-size: 15px; }
.pick-body dt { color: var(--ink-3); font-size: 13.5px; padding-top: 2px; }
.pick-body dd { margin: 0; }

/* KV 模擬 */
.regions { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin: 14px 0; }
.region { border: 1.5px solid var(--ink); border-radius: 12px; padding: 10px; background: var(--paper); text-align: center; transition: background .3s; }
.region .rn { font-size: 13.5px; font-weight: 700; }
.region .rv { font-family: var(--mono); font-size: 13px; margin: 6px 0; padding: 4px; border-radius: 6px; background: var(--card); border: 1px solid var(--rule); word-break: break-all; }
.region.stale { background: color-mix(in srgb, var(--warn) 16%, var(--paper)); }
.region.fresh { background: color-mix(in srgb, var(--ok) 16%, var(--paper)); }
.region .rs { font-size: 12px; color: var(--ink-3); min-height: 1.4em; }

/* DO 模擬 */
.seats { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center; margin: 12px 0; }
.actor { border: 1.5px solid var(--ink); border-radius: 12px; padding: 10px 12px; background: var(--paper); text-align: center; font-size: 14.5px; }
.actor b { display: block; font-size: 16px; }
.actor.win { background: color-mix(in srgb, var(--ok) 18%, var(--paper)); }
.actor.lose { background: color-mix(in srgb, var(--warn) 18%, var(--paper)); }
.actor.oops { background: color-mix(in srgb, var(--bad) 18%, var(--paper)); }
.counter { width: 120px; height: 120px; border-radius: 50%; border: 6px solid var(--l-data); display: grid; place-items: center; text-align: center; background: var(--card); }
.counter b { font-family: var(--mono); font-size: 34px; line-height: 1; display: block; }
.counter small { font-size: 12px; color: var(--ink-3); }
.counter.oops { border-color: var(--bad); }

/* Queue 模擬 */
.qsim { display: grid; grid-template-columns: 1fr 1.3fr 1fr; gap: 12px; align-items: stretch; margin: 12px 0; }
.qbox { border: 1.5px solid var(--ink); border-radius: 12px; padding: 10px; background: var(--paper); min-height: 150px; }
.qbox h6 { margin: 0 0 6px; font-size: 13.5px; }
.qbox .stat { font-family: var(--mono); font-size: 13px; color: var(--ink-2); }
.msgs { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.msg { width: 14px; height: 14px; border-radius: 4px; background: var(--l-async); display: block; transition: background .3s; }
.msg.done { background: var(--ok); }
.msg.fail { background: var(--bad); }
.msg.wait { background: var(--warn); }

/* Workflow 步驟 */
.steps { list-style: none; padding: 0; margin: 12px 0; display: grid; gap: 6px; }
.steps li { display: grid; grid-template-columns: 30px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 8px 12px; border: 1px solid var(--rule); border-radius: 10px; background: var(--paper); font-size: 14.5px; transition: background .25s; }
.steps li .sn { width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--ink-3); display: grid; place-items: center; font-family: var(--mono); font-size: 12px; }
.steps li .ss { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); }
.steps li.run { background: color-mix(in srgb, var(--l-async) 14%, var(--paper)); }
.steps li.run .sn { border-color: var(--l-async); }
.steps li.done .sn { background: var(--ok); border-color: var(--ok); color: #fff; }
.steps li.fail { background: color-mix(in srgb, var(--bad) 14%, var(--paper)); }
.steps li.fail .sn { border-color: var(--bad); color: var(--bad); }
.steps li.wait { background: color-mix(in srgb, var(--warn) 14%, var(--paper)); }

/* AI Gateway dashboard mock */
.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.kpi { border: 1px solid var(--rule); border-radius: 10px; padding: 10px 12px; background: var(--paper); }
.kpi small { display: block; font-size: 12px; color: var(--ink-3); }
.kpi b { font-family: var(--mono); font-size: 21px; }
.prov { display: grid; grid-template-columns: 110px minmax(0, 1fr) 60px; gap: 10px; align-items: center; font-size: 14px; margin: 7px 0; }
.prov .track { height: 14px; background: var(--paper-2); border-radius: 7px; overflow: hidden; }
.prov .track i { display: block; height: 100%; border-radius: 7px; transition: width .6s; }
.prov .num { font-family: var(--mono); font-size: 13px; text-align: right; }
.prov.down .track i { background: var(--bad) !important; }

/* RAG 管線 */
.rag-tabs { margin-bottom: 10px; }
.rag-steps { display: flex; flex-wrap: wrap; gap: 8px 6px; align-items: center; margin: 10px 0; }
.rag-step { border: 1.5px solid var(--rule); border-radius: 10px; padding: 6px 12px; background: var(--paper); font-size: 14px; transition: all .25s; }
.rag-step small { display: block; font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.rag-step.on { border-color: var(--l-ai); background: color-mix(in srgb, var(--l-ai) 16%, var(--paper)); transform: translateY(-2px); }
.rag-arrow { color: var(--ink-3); font-size: 14px; }
.rag-say { min-height: 3.4em; font-size: 15px; color: var(--ink-2); border-top: 1px dashed var(--rule); padding-top: 10px; }

/* 計算機 */
.calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; }
.field { margin: 10px 0; }
.field label { display: flex; justify-content: space-between; gap: 8px; font-size: 14.5px; margin-bottom: 4px; }
.field label output { font-family: var(--mono); font-weight: 600; }
.field input[type="range"] { width: 100%; accent-color: var(--orange); }
.field select, .field input[type="number"] { width: 100%; padding: 6px 10px; border: 1.5px solid var(--ink); border-radius: 8px; background: var(--paper); color: var(--ink); font: inherit; font-size: 15px; }
.bill { border: 1px solid var(--rule); border-radius: 12px; padding: 12px 14px; background: var(--paper); }
.bill .row { display: flex; justify-content: space-between; gap: 10px; font-size: 14.5px; padding: 4px 0; border-bottom: 1px dotted var(--rule); }
.bill .row span:last-child { font-family: var(--mono); }
.bill .total { font-weight: 700; border-bottom: 0; font-size: 16px; padding-top: 8px; }
.bill .total span:last-child { color: var(--orange-ink); }
.bars2 { margin-top: 12px; }

/* Access / 聊天 mock */
.login-mock { max-width: 360px; margin: 6px auto; text-align: center; padding: 18px 10px; }
.login-mock .lock { width: 48px; height: 48px; border-radius: 50%; background: var(--orange); margin: 0 auto 10px; display: grid; place-items: center; border: 1.5px solid var(--ink); }
.login-mock h5 { margin: 0 0 4px; font-size: 16px; }
.login-mock p { margin: 0 0 12px; font-size: 13.5px; color: var(--ink-2); }
.login-mock .gbtn { width: 100%; border: 1.5px solid var(--ink); border-radius: 8px; background: var(--card); padding: 8px; cursor: pointer; font-size: 14.5px; margin-bottom: 8px; }
.login-mock input { width: 100%; padding: 8px 10px; border: 1.5px solid var(--ink); border-radius: 8px; background: var(--paper); color: var(--ink); font: inherit; font-size: 14.5px; }
.login-result { font-size: 14px; margin-top: 10px; min-height: 1.6em; }
.chat { display: flex; flex-direction: column; gap: 8px; padding: 12px; min-height: 180px; }
.bubble { max-width: 82%; padding: 8px 12px; border-radius: 14px; font-size: 14.5px; line-height: 1.6; }
.bubble.u { align-self: flex-end; background: #06c755; color: #fff; border-bottom-right-radius: 4px; }
.bubble.a { align-self: flex-start; background: var(--paper-2); border-bottom-left-radius: 4px; }
.bubble.sys { align-self: center; background: transparent; font-family: var(--mono); font-size: 12px; color: var(--ink-3); padding: 0; }

/* 藍圖分頁 */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 16px; }
.tabs button { border: 1.5px solid var(--ink); background: var(--card); border-radius: 999px; padding: 6px 16px; cursor: pointer; font-size: 15px; }
.tabs button[aria-selected="true"] { background: var(--ink); color: var(--paper); }
.bp { display: none; }
.bp.show { display: block; animation: rise .35s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.bp-diagram { display: grid; gap: 8px; margin: 12px 0; }
.bp-row { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 12px; align-items: center; }
.bp-row .who { font-size: 13.5px; font-weight: 700; text-align: right; color: var(--ink-2); }
.bp-row .what { display: flex; flex-wrap: wrap; gap: 6px; }
.bp-row .what span { border: 1.5px solid var(--c, var(--ink)); background: color-mix(in srgb, var(--c, var(--ink)) 10%, var(--card)); border-radius: 8px; padding: 3px 10px; font-size: 14px; }
.bp-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
.bp-split .side { border: 1.5px solid var(--ink); border-radius: 12px; padding: 12px 14px; background: var(--card); }
.bp-split .side h5 { margin: 0 0 8px; font-size: 15px; }
.bp-split .side ul { margin: 0; padding-left: 1.2em; font-size: 14.5px; }

/* 學習路線 */
.path { list-style: none; padding: 0; margin: 16px 0; counter-reset: p; }
.path li { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 12px; align-items: start; padding: 10px 0; border-bottom: 1px dashed var(--rule); }
.path input { width: 22px; height: 22px; margin: 4px 0 0 4px; accent-color: var(--ok); cursor: pointer; }
.path label { cursor: pointer; }
.path li.done label b { text-decoration: line-through; text-decoration-color: var(--ok); text-decoration-thickness: 2px; }
.path b { display: block; }
.path span { font-size: 14.5px; color: var(--ink-2); }
.path-meter { height: 10px; border-radius: 5px; background: var(--paper-2); overflow: hidden; margin: 8px 0; }
.path-meter i { display: block; height: 100%; width: 0; background: var(--ok); transition: width .4s; }

/* FAQ */
details.faq { border: 1.5px solid var(--ink); border-radius: 12px; background: var(--card); margin: 10px 0; }
details.faq summary { cursor: pointer; padding: 12px 16px; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 10px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "＋"; color: var(--orange-ink); flex: none; }
details.faq[open] summary::after { content: "－"; }
details.faq .ans { padding: 0 16px 14px; font-size: 15.5px; color: var(--ink-2); }
details.faq .ans p { margin: .4em 0; }

/* 名詞小字典 */
.gloss-search { width: 100%; padding: 10px 14px; border: 1.5px solid var(--ink); border-radius: 999px; background: var(--card); color: var(--ink); font: inherit; font-size: 16px; }
.gloss { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 10px; margin-top: 14px; }
.gloss div { border: 1px solid var(--rule); border-radius: 10px; padding: 10px 14px; background: var(--card); }
.gloss b { font-family: var(--mono); font-size: 14px; display: block; }
.gloss span { font-size: 14.5px; color: var(--ink-2); line-height: 1.6; display: block; }
.gloss-empty { color: var(--ink-3); font-size: 14.5px; display: none; }

footer.site { border-top: 1.5px solid var(--ink); padding: 26px 0 50px; margin-top: 50px; font-size: 14px; color: var(--ink-2); }
.sources { columns: 2; column-gap: 28px; font-size: 13.5px; padding-left: 1.2em; }
.sources li { break-inside: avoid; margin-bottom: 4px; word-break: break-all; }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 窄螢幕 ---------- */
@media (max-width: 1080px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding: 0 16px; gap: 0; }
  .sidenav { position: fixed; inset: 58px 0 0 0; z-index: 60; background: var(--paper); padding: 20px 22px 60px; max-height: none; display: none; border-top: 1.5px solid var(--ink); }
  .sidenav.open { display: block; }
  .menu-btn { display: inline-flex; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .topbar { padding: 10px 16px; }
  .brand .brand-text small { display: none; }
  .topbar { gap: 8px; }
  .brand { gap: 8px; min-width: 0; font-size: 14px; }
  .brand-text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .icon-btn { padding: 5px 10px; font-size: 13px; }
  .brand-mark { flex-shrink: 0; }
  .hero { padding-top: 36px; }
  .layer { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .fit, .grid-2, .grid-3, .calc, .bp-split { grid-template-columns: minmax(0, 1fr); }
  .regions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .regions .region:last-child { grid-column: 1 / -1; }
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qsim { grid-template-columns: minmax(0, 1fr); }
  .seats { grid-template-columns: 1fr 1fr; }
  .seats .counter { grid-column: 1 / -1; grid-row: 1; justify-self: center; }
  .pick-result { grid-template-columns: minmax(0, 1fr); }
  .pick-badge { width: 90px; height: 90px; font-size: 15px; }
  .pick-body dl { grid-template-columns: minmax(0, 1fr); }
  .pick-body dt { padding-top: 6px; }
  .bp-row { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .bp-row .who { text-align: left; }
  .lat-row { grid-template-columns: 70px minmax(0, 1fr) 58px; }
  .prov { grid-template-columns: 88px minmax(0, 1fr) 52px; }
  .sources { columns: 1; }
  .lab { padding: 20px 16px 16px; }
  th, td { padding: 8px 10px; }
}