/* ============================================================
   Falcon — 工業風暗色主題
   此檔為「基礎層」: 即使 Tailwind CDN 無法連線 (廠區內網 / 中國網路)
   版面仍然可讀。Tailwind 只負責排版微調。
   ============================================================ */

:root {
  --bg:        #070a0e;
  --bg-2:      #0c1117;
  --panel:     #11171f;
  --panel-2:   #161d27;
  --line:      #1e2733;
  --line-hi:   #2b3746;

  --txt:       #e4e9ef;
  --txt-2:     #97a3b2;
  --txt-3:     #66717f;

  --amber:     #ff9d2e;   /* 主色 — 工業警示黃 */
  --amber-dk:  #c9760f;
  --cyan:      #35d6e8;   /* 資料流 */
  --green:     #37d67a;   /* 正常 / 已上線 */
  --red:       #ff5a5a;   /* 異常 */
  --violet:    #9b8cff;   /* AI */

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Consolas, "Noto Sans Mono CJK TC", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Noto Sans SC",
          "PingFang TC", "PingFang SC", "Microsoft JhengHei", "Microsoft YaHei", Roboto, sans-serif;

  --maxw: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--txt);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: .01em;
  overflow-x: hidden;
}

/* 背景: 工業網格 + 微暈光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 12% -5%,  rgba(255,157,46,.10), transparent 60%),
    radial-gradient(800px 600px at 92% 8%,   rgba(53,214,232,.07), transparent 60%),
    linear-gradient(180deg, #070a0e 0%, #090d13 60%, #070a0e 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .5;
  background-image:
    linear-gradient(rgba(43,55,70,.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43,55,70,.16) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.15) 70%, transparent);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.15) 70%, transparent);
}

img, svg { max-width: 100%; }
a { color: var(--amber); text-decoration: none; }
a:hover { color: #ffb85c; }

/* ---------- 版面 ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section--tight { padding: 64px 0; }
.grid { display: grid; gap: 24px; }
@media (min-width: 860px) {
  .g2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .g3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .g4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
  .split { grid-template-columns: 1.05fr .95fr; align-items: center; gap: 56px; }
}

/* ---------- 文字 ---------- */
h1, h2, h3, h4 { line-height: 1.22; letter-spacing: -.015em; margin: 0 0 .6em; font-weight: 650; }
h1 { font-size: clamp(2.1rem, 5.2vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.35rem); }
h3 { font-size: 1.16rem; }
p  { margin: 0 0 1em; color: var(--txt-2); }
.lead { font-size: clamp(1.02rem, 1.7vw, 1.2rem); color: var(--txt-2); max-width: 62ch; }
.mono { font-family: var(--mono); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: .72rem; font-weight: 600;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--amber); margin-bottom: 18px;
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px; background: var(--amber); opacity: .7;
}

.hl        { color: var(--txt); }
.hl-amber  { color: var(--amber); }
.hl-cyan   { color: var(--cyan); }
.hl-violet { color: var(--violet); }

/* ---------- 卡片 / 面板 ---------- */
.card {
  background: linear-gradient(160deg, var(--panel) 0%, var(--bg-2) 100%);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 26px;
  position: relative;
  transition: border-color .22s, transform .22s, background .22s;
}
.card:hover { border-color: var(--line-hi); transform: translateY(-2px); }
.card > h3 { display: flex; align-items: center; gap: 10px; }
.card p:last-child { margin-bottom: 0; }

/* 卡片左上角切角裝飾 */
.card--notch::before {
  content: ""; position: absolute; top: 0; left: 0;
  width: 34px; height: 2px; background: var(--amber);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
}
.panel__bar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
  font-family: var(--mono); font-size: .74rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--txt-3);
}
.panel__body { padding: 18px; }

/* ---------- 標籤 / 狀態 ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: .7rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  padding: 4px 9px; border-radius: 3px;
  border: 1px solid var(--line-hi); color: var(--txt-2);
  background: rgba(255,255,255,.02);
}
.tag--live  { color: var(--green);  border-color: rgba(55,214,122,.35); background: rgba(55,214,122,.07); }
.tag--dev   { color: var(--amber);  border-color: rgba(255,157,46,.35); background: rgba(255,157,46,.07); }
.tag--ai    { color: var(--violet); border-color: rgba(155,140,255,.35); background: rgba(155,140,255,.07); }

.dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; flex: none; }
.dot--pulse { animation: pulse 1.9s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .35; transform: scale(.8); } }

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--mono); font-size: .82rem; font-weight: 600;
  letter-spacing: .07em; text-transform: uppercase;
  padding: 13px 24px; border-radius: 3px;
  border: 1px solid var(--line-hi);
  color: var(--txt); background: transparent;
  cursor: pointer; transition: all .2s;
}
.btn:hover { border-color: var(--amber); color: var(--amber); background: rgba(255,157,46,.06); }
.btn--primary {
  background: var(--amber); border-color: var(--amber); color: #17110a;
}
.btn--primary:hover { background: #ffb04f; border-color: #ffb04f; color: #17110a; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* ---------- 頁首 ---------- */
.hdr {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7,10,14,.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.hdr__in { display: flex; align-items: center; gap: 18px; height: 62px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--txt); font-weight: 700; letter-spacing: -.01em; }
.logo:hover { color: var(--txt); }
.logo__mark { width: 26px; height: 26px; flex: none; }
.nav { display: none; gap: 4px; margin-left: auto; }
@media (min-width: 940px) { .nav { display: flex; } .hdr__burger { display: none; } }
.nav a {
  font-size: .88rem; color: var(--txt-2); padding: 8px 13px; border-radius: 3px;
  transition: color .18s, background .18s;
}
.nav a:hover { color: var(--txt); background: rgba(255,255,255,.04); }
.nav a[aria-current="page"] { color: var(--amber); }

.hdr__burger {
  margin-left: auto; background: none; border: 1px solid var(--line);
  color: var(--txt); border-radius: 3px; padding: 7px 10px; cursor: pointer;
}
.mnav { display: none; border-top: 1px solid var(--line); background: var(--bg-2); }
.mnav.open { display: block; }
.mnav a { display: block; padding: 13px 24px; color: var(--txt-2); border-bottom: 1px solid var(--line); }

/* 語言切換 */
.lang { position: relative; }
.lang__btn {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: .76rem; letter-spacing: .06em;
  background: transparent; border: 1px solid var(--line);
  color: var(--txt-2); padding: 7px 11px; border-radius: 3px; cursor: pointer;
}
.lang__btn:hover { border-color: var(--line-hi); color: var(--txt); }
.lang__menu {
  position: absolute; right: 0; top: calc(100% + 7px);
  min-width: 158px; background: var(--panel-2);
  border: 1px solid var(--line-hi); border-radius: 3px;
  padding: 5px; display: none; z-index: 60;
  box-shadow: 0 14px 34px rgba(0,0,0,.5);
}
.lang__menu.open { display: block; }
.lang__menu a { display: block; padding: 9px 12px; font-size: .87rem; color: var(--txt-2); border-radius: 2px; }
.lang__menu a:hover { background: rgba(255,255,255,.05); color: var(--txt); }
.lang__menu a[aria-current="true"] { color: var(--amber); }

/* ---------- 頁尾 ---------- */
.ftr { border-top: 1px solid var(--line); background: var(--bg-2); padding: 56px 0 34px; margin-top: 40px; }
.ftr h4 {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--txt-3); margin-bottom: 14px;
}
.ftr a { display: block; color: var(--txt-2); font-size: .9rem; padding: 5px 0; }
.ftr a:hover { color: var(--amber); }
.ftr__base {
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between;
  font-family: var(--mono); font-size: .76rem; color: var(--txt-3);
}

/* ---------- 規格表 ---------- */
.spec { width: 100%; border-collapse: collapse; font-size: .9rem; }
.spec th, .spec td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec th { font-family: var(--mono); font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--txt-3); font-weight: 600; width: 34%; }
.spec td { color: var(--txt); }
.spec tr:last-child th, .spec tr:last-child td { border-bottom: 0; }

/* ---------- 步驟時間軸 ---------- */
.steps { list-style: none; margin: 0; padding: 0; }
.steps > li { position: relative; padding: 0 0 32px 58px; }
.steps > li::before {
  content: attr(data-n);
  position: absolute; left: 0; top: 0;
  width: 36px; height: 36px; border-radius: 3px;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: .82rem; font-weight: 700;
  color: var(--amber); background: rgba(255,157,46,.09);
  border: 1px solid rgba(255,157,46,.32);
}
.steps > li::after {
  content: ""; position: absolute; left: 18px; top: 40px; bottom: 4px;
  width: 1px; background: linear-gradient(var(--line-hi), transparent);
}
.steps > li:last-child { padding-bottom: 0; }
.steps > li:last-child::after { display: none; }
.steps h3 { margin-bottom: .35em; }
.steps p { margin-bottom: 0; }

/* ---------- 終端機樣式輸出 ---------- */
.term {
  font-family: var(--mono); font-size: .8rem; line-height: 1.85;
  background: #05080b; border: 1px solid var(--line);
  border-radius: 4px; padding: 16px 18px;
  color: var(--txt-2); overflow-x: auto; white-space: pre;
}
.term .ok  { color: var(--green); }
.term .warn{ color: var(--amber); }
.term .err { color: var(--red); }
.term .dim { color: var(--txt-3); }
.term .cy  { color: var(--cyan); }

/* ---------- 統計數字 ---------- */
.stat { border-left: 2px solid var(--amber); padding-left: 16px; }
.stat__n { font-family: var(--mono); font-size: 1.9rem; font-weight: 700; color: var(--txt); line-height: 1.1; }
.stat__l { font-size: .84rem; color: var(--txt-3); }

/* ---------- 進場動畫 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
  html { scroll-behavior: auto; }
}

/* ---------- SVG 動畫共用 ---------- */
.dgm { width: 100%; height: auto; display: block; }
.dgm text { font-family: var(--mono); fill: var(--txt-2); }
.dgm .box  { fill: var(--panel); stroke: var(--line-hi); stroke-width: 1; }
.dgm .box-hi { fill: rgba(255,157,46,.07); stroke: var(--amber); stroke-width: 1.2; }
.dgm .wire { stroke: var(--line-hi); stroke-width: 1.4; fill: none; }
.dgm .lbl { font-size: 10px; letter-spacing: .1em; text-transform: uppercase; fill: var(--txt-3); }
.dgm .ttl { font-size: 13px; fill: var(--txt); font-weight: 600; }

.flow { stroke-dasharray: 5 9; animation: flow 1.1s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -28; } }