@charset "UTF-8";

/* ==========================================================================
   PO Tech Studio — 尚孚精工電光科技坊
   視覺基調取自光學鍍膜：增透膜的青綠反光為主色，紫洋紅為輔。
   ========================================================================== */

:root {
  --ground:      #EFF1EF;
  --surface:     #FFFFFF;
  --surface-2:   #F4F7F6;
  --ink:         #0E1A1C;
  --ink-2:       #33454A;
  --muted:       #5E6F75;
  --line:        #D4DBD9;
  --line-soft:   #E3E8E6;
  --accent:      #0C5C68;
  --accent-ink:  #FFFFFF;
  --accent-soft: #DCEAEC;
  --coating:     #7A3A6B;
  --band-swir:   #1F6F7A;
  --band-mwir:   #8F6417;
  --band-lwir:   #A1402C;

  --f-display: "Archivo", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --f-body:    "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, -apple-system, sans-serif;
  --f-mono:    "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --w-page: 1080px;
  --w-text: 720px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground:      #091214;
    --surface:     #101B1E;
    --surface-2:   #16242A;
    --ink:         #E4EDEE;
    --ink-2:       #AFC1C5;
    --muted:       #7E9297;
    --line:        #243539;
    --line-soft:   #1B292D;
    --accent:      #5BB8C6;
    --accent-ink:  #06171B;
    --accent-soft: #11292E;
    --coating:     #C489B6;
    --band-swir:   #5FC0CC;
    --band-mwir:   #DFAF4E;
    --band-lwir:   #E2836B;
  }
}

[data-theme="dark"] {
  --ground:      #091214;
  --surface:     #101B1E;
  --surface-2:   #16242A;
  --ink:         #E4EDEE;
  --ink-2:       #AFC1C5;
  --muted:       #7E9297;
  --line:        #243539;
  --line-soft:   #1B292D;
  --accent:      #5BB8C6;
  --accent-ink:  #06171B;
  --accent-soft: #11292E;
  --coating:     #C489B6;
  --band-swir:   #5FC0CC;
  --band-mwir:   #DFAF4E;
  --band-lwir:   #E2836B;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
svg { max-width: 100%; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; z-index: 100;
}
.skip:focus { left: 8px; top: 8px; }

/* ---------- 版面容器 ---------- */
.wrap { max-width: var(--w-page); margin: 0 auto; padding-inline: 20px; }
.wrap-text { max-width: var(--w-text); margin: 0 auto; padding-inline: 20px; }

/* ---------- 頁首 ---------- */
.site-head {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.head-inner {
  max-width: var(--w-page); margin: 0 auto;
  padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px 28px; flex-wrap: wrap;
}
/* 頂端光譜細線：波長由短到長，對應本站三個工作波段 */
.spectral-top {
  height: 3px;
  background: linear-gradient(90deg,
    #2B3A8C 0%, #1F6F7A 26%, #3E8F6B 44%, #A8761B 68%, #A1402C 86%, #6E2A20 100%);
}

.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand-logo { width: 44px; height: auto; flex: none; }
.brand-text { display: flex; align-items: baseline; gap: 9px; flex-wrap: wrap; }
.brand .mark {
  font-family: var(--f-display); font-weight: 700; font-size: 15.5px;
  letter-spacing: .13em; color: var(--ink); white-space: nowrap; line-height: 1.2;
}
.brand .mark-zh { font-size: 12.5px; color: var(--muted); letter-spacing: .04em; white-space: nowrap; }
.site-nav { display: flex; gap: 6px 4px; flex-wrap: wrap; }
.site-nav a {
  font-size: 14.5px; color: var(--ink-2); padding: 5px 10px; border-radius: 2px;
}
.site-nav a:hover { background: var(--surface-2); color: var(--ink); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--accent); font-weight: 700; }

/* ---------- 通用區塊 ---------- */
section { padding-block: 56px; }
.band { background: var(--surface); border-block: 1px solid var(--line); }

.eyebrow {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 14px;
}
h1 {
  font-family: var(--f-display); font-weight: 700;
  font-size: clamp(30px, 6.6vw, 46px); line-height: 1.28; letter-spacing: -.005em;
  margin: 0 0 18px; text-wrap: balance;
}
h2 {
  font-family: var(--f-display); font-weight: 700;
  font-size: clamp(22px, 4.6vw, 29px); line-height: 1.4;
  margin: 0 0 10px; text-wrap: balance;
}
h3 { font-size: 18px; font-weight: 700; line-height: 1.55; margin: 0 0 8px; text-wrap: balance; }
h4 { font-size: 15.5px; font-weight: 700; margin: 0 0 6px; color: var(--ink); }
p { margin: 0 0 18px; color: var(--ink-2); }
.sec-note { color: var(--muted); font-size: 14.5px; margin: 0 0 32px; max-width: 62ch; }
strong { color: var(--ink); font-weight: 700; }

code, .mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
code {
  font-size: .86em; background: var(--surface-2); border: 1px solid var(--line-soft);
  padding: 1px 5px; border-radius: 3px; color: var(--ink);
}

/* ---------- 首頁 hero ---------- */
.hero { padding-block: 64px 44px; }
.hero h1 { max-width: 16ch; }
.hero .deck { font-size: 17px; max-width: 54ch; color: var(--ink-2); }

.hero-grid { display: grid; grid-template-columns: 1fr; gap: 40px; align-items: center; }
@media (min-width: 900px) {
  .hero-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; }
}
.hero-figure {
  border: 1px solid var(--line); background: var(--surface);
  padding: 18px 16px 12px;
}
.hero-figure.banner { padding: 0; border-color: var(--line); overflow: hidden; background: #0A1620; }
.hero-figure.banner img { width: 100%; height: auto; display: block; }
.hero-figure figcaption {
  font-family: var(--f-mono); font-size: 10.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted); margin-top: 8px; text-align: center;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.btn {
  display: inline-block; font-size: 15px; font-weight: 700;
  padding: 11px 22px; border-radius: 2px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--accent-ink);
}
.btn:hover { text-decoration: none; opacity: .9; }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-ghost:hover { background: var(--accent-soft); }

/* ---------- 波段條 ---------- */
.bands {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 40px;
}
.band-cell { background: var(--surface); padding: 16px 18px; }
.band-cell .rule { height: 3px; width: 46px; margin-bottom: 12px; }
.band-cell.swir .rule { background: var(--band-swir); }
.band-cell.mwir .rule { background: var(--band-mwir); }
.band-cell.lwir .rule { background: var(--band-lwir); }
.band-cell .code {
  font-family: var(--f-display); font-weight: 700; font-size: 15px; letter-spacing: .08em;
  color: var(--ink); display: block;
}
.band-cell .range {
  font-family: var(--f-mono); font-size: 12.5px; color: var(--muted);
  display: block; margin: 2px 0 8px;
}
.band-cell .use { font-size: 13.5px; color: var(--ink-2); line-height: 1.65; }

/* ---------- 圖表 ---------- */
.fig {
  margin: 0 0 28px; border: 1px solid var(--line); background: var(--surface);
  padding: 22px 20px 14px;
}
.fig > svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }
.fig figcaption {
  font-size: 13px; line-height: 1.75; color: var(--muted);
  margin-top: 16px; padding-top: 13px; border-top: 1px solid var(--line-soft);
}
.fig figcaption code { font-size: .88em; }
.fig.scroll { overflow-x: auto; }
.fig.scroll > svg { min-width: 560px; }
.prose .fig { margin: 32px 0; }

/* ---------- 流程帶 ---------- */
.flow {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(178px, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line);
}
.flow-step { background: var(--surface); padding: 22px 20px; display: flex; flex-direction: column; }
.flow-step .n {
  font-family: var(--f-mono); font-size: 10.5px; letter-spacing: .14em;
  color: var(--muted); margin-bottom: 14px;
}
.flow-step .ico { width: 30px; height: 30px; color: var(--accent); margin-bottom: 14px; }
.flow-step h3 { font-size: 15px; margin: 0 0 8px; }
.flow-step > p { font-size: 13px; line-height: 1.7; margin: 0 0 16px; }
.flow-step .out {
  font-family: var(--f-mono); font-size: 10.5px; color: var(--muted);
  margin: auto 0 0; padding-top: 12px; border-top: 1px solid var(--line-soft);
}

.card .ico { width: 34px; height: 34px; color: var(--accent); margin-bottom: 14px; }

/* ---------- 卡片群 ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.card {
  background: var(--surface); border: 1px solid var(--line);
  padding: 24px 24px 10px; display: flex; flex-direction: column;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.card:hover { border-color: var(--accent); box-shadow: 0 1px 0 var(--accent); }
.card .idx {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .12em;
  color: var(--muted); display: block; margin-bottom: 10px;
}
.card p { font-size: 14.5px; line-height: 1.75; }
.card ul { margin: 0 0 18px; padding-left: 20px; font-size: 14.5px; color: var(--ink-2); }
.card li { margin-bottom: 6px; }
.card li::marker { color: var(--accent); }

/* ---------- 服務條目 ---------- */
.svc { border-top: 1px solid var(--line); padding-block: 26px; }
.svc:first-of-type { border-top: none; }
.svc-head { display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; }
.svc-no {
  font-family: var(--f-mono); font-size: 12px; color: var(--accent);
  letter-spacing: .08em; padding-top: 2px;
}
.svc p { margin: 8px 0 0; font-size: 15px; }
.svc .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.tag {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .05em;
  color: var(--muted); border: 1px solid var(--line); padding: 2px 8px; border-radius: 2px;
}

/* ---------- 表格 ---------- */
.table-scroll {
  overflow-x: auto; border: 1px solid var(--line);
  background: var(--surface); margin-bottom: 28px;
}
table { border-collapse: collapse; width: 100%; min-width: 620px; font-size: 14px; }
th, td { text-align: left; padding: 12px 15px; border-bottom: 1px solid var(--line-soft); vertical-align: top; line-height: 1.7; }
thead th {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); font-weight: 500; background: var(--surface-2);
  border-bottom: 1px solid var(--line); white-space: nowrap;
}
tbody tr:last-child td { border-bottom: none; }
td.num, th.num { font-family: var(--f-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
caption { caption-side: bottom; text-align: left; font-size: 12.5px; color: var(--muted); padding: 10px 15px; }

/* ---------- 文章排版 ---------- */
.article { padding-block: 48px 24px; }
.article-head { border-bottom: 1px solid var(--line); padding-bottom: 26px; margin-bottom: 34px; }
.article-meta {
  display: flex; flex-wrap: wrap; gap: 8px 18px;
  font-family: var(--f-mono); font-size: 11.5px; color: var(--muted); margin-top: 16px;
}
.prose { max-width: var(--w-text); }
.prose h2 { font-size: clamp(20px, 4.2vw, 25px); margin-top: 44px; }
.prose h3 { font-size: 17px; margin-top: 30px; color: var(--accent); }
.prose p { font-size: 16.5px; }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 22px; color: var(--ink-2); }
.prose li { margin-bottom: 10px; }
.prose li::marker { color: var(--accent); }
.prose > :first-child { margin-top: 0; }
.prose .src, .src {
  font-size: 13px; line-height: 1.7; color: var(--muted);
  border-left: 2px solid var(--line); padding-left: 14px; margin: -6px 0 22px;
}

.note {
  background: var(--surface-2); border: 1px solid var(--line);
  border-left: 3px solid var(--coating);
  padding: 20px 22px 4px; margin: 28px 0;
}
.note .note-title {
  font-size: 14px; font-weight: 700; color: var(--ink);
  margin: 0 0 10px; letter-spacing: .02em;
}
.note p { font-size: 15px; }

.pull {
  font-family: var(--f-display); font-weight: 600;
  font-size: clamp(18px, 3.6vw, 21px); line-height: 1.6; color: var(--ink);
  border-left: 3px solid var(--accent); padding: 4px 0 4px 20px; margin: 32px 0;
}

/* ---------- 文章列表 ---------- */
.post-item { border-top: 1px solid var(--line); padding-block: 26px; }
.post-item:first-child { border-top: none; }
.post-item .kicker {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 8px;
}
.post-item h3 { font-size: 20px; margin-bottom: 8px; }
.post-item h3 a { color: var(--ink); }
.post-item h3 a:hover { color: var(--accent); }
.post-item p { font-size: 15px; margin-bottom: 10px; }

/* ---------- 聯絡資訊 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.contact-cell { background: var(--surface); padding: 20px 22px; }
.contact-cell .k {
  font-family: var(--f-mono); font-size: 10.5px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 8px;
}
.contact-cell .v { font-size: 15.5px; color: var(--ink); line-height: 1.7; }
.embed-frame { border: 1px solid var(--line); background: var(--surface); padding: 6px; margin-top: 28px; }
.embed-frame iframe { width: 100%; min-height: 780px; border: 0; display: block; }

/* ---------- CTA ---------- */
.cta-band { background: var(--accent); color: var(--accent-ink); border: none; }
.cta-band h2, .cta-band p { color: var(--accent-ink); }
.cta-band p { opacity: .9; max-width: 56ch; }
.cta-band .btn {
  background: var(--accent-ink); color: var(--accent); border-color: var(--accent-ink);
}

/* ---------- 頁尾 ---------- */
.site-foot {
  border-top: 1px solid var(--line); background: var(--surface);
  padding-block: 44px 32px; margin-top: 0;
  padding-bottom: calc(32px + env(safe-area-inset-bottom, 0px));
}
.foot-mark { width: 58px; height: auto; display: block; margin-bottom: 14px; }
.foot-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 28px; }
.foot-grid .foot-h {
  font-family: var(--f-mono); font-size: 10.5px; line-height: 1.5; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted); font-weight: 500; margin-bottom: 12px;
}
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.foot-grid li { margin-bottom: 8px; font-size: 14.5px; color: var(--ink-2); }
.foot-grid a { color: var(--ink-2); }
.foot-grid a:hover { color: var(--accent); }
.foot-bottom {
  margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line-soft);
  font-size: 12.5px; color: var(--muted);
  display: flex; flex-wrap: wrap; gap: 6px 20px; justify-content: space-between;
}

/* ---------- 麵包屑 ---------- */
.crumbs {
  font-family: var(--f-mono); font-size: 11.5px; color: var(--muted);
  padding-top: 24px; display: flex; gap: 8px; flex-wrap: wrap;
}
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--accent); }

/* ---------- 頁面標頭 ---------- */
.page-head { padding-block: 40px 30px; border-bottom: 1px solid var(--line); }
.page-head p { font-size: 16.5px; max-width: 58ch; margin-bottom: 0; }

@media (max-width: 720px) {
  /* 手機上導覽列會折成兩行，若維持 sticky 會吃掉太多畫面 */
  .site-head { position: static; }
  .site-nav { gap: 2px; }
  .site-nav a { padding: 5px 8px; font-size: 14px; }
}

@media (max-width: 640px) {
  section { padding-block: 44px; }
  .head-inner { padding-inline: 16px; }
  .wrap, .wrap-text { padding-inline: 16px; }
  .card { padding: 20px 20px 8px; }
  .hero { padding-block: 40px 32px; }
}