/* OmniCore Lab — 全站樣式
   目錄：1 色彩與變數　2 基礎　3 版面　4 頁首頁尾　5 元件　6 動態　7 列印
   顏色只在第 1 節定義；深色模式在同一節用 prefers-color-scheme 覆寫。 */

/* ───────── 1 色彩與變數 ───────── */
:root {
  --ink: #121A23;
  --ink-2: #1C2834;
  --mist: #7FA7A8;
  --sand: #E2C79A;

  --bg: #F6F7F4;
  --surface: #ECEFEB;
  --text: #16202A;
  --muted: #4F5E69;
  --line: #D3DAD6;
  --link: #2A5C60;
  --mark: #5F8F91;          /* 圖形用的霧青，不拿來當內文字色 */
  --mark-soft: rgba(127, 167, 168, .16);
  --btn-bg: #121A23;
  --btn-text: #F6F7F4;

  --band-bg: #121A23;
  --band-text: #E6ECEC;
  --band-muted: #A9B8BD;
  --band-link: #A9CDCD;
  --band-line: #2B3947;

  --focus: #2A5C60;

  --serif: "Newsreader", "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, -apple-system, "Segoe UI", sans-serif;

  --gutter: clamp(20px, 5vw, 48px);
  --measure: 35em;
}

:root:lang(en) {
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --measure: 39em;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F161E;
    --surface: #17212B;
    --text: #E2E8E9;
    --muted: #A5B3B8;
    --line: #283542;
    --link: #A9CDCD;
    --mark: #7FA7A8;
    --mark-soft: rgba(127, 167, 168, .14);
    --btn-bg: #E2E8E9;
    --btn-text: #0F161E;

    --band-bg: #1A2530;
    --band-line: #324253;

    --focus: #E2C79A;
  }
}

/* ───────── 2 基礎 ───────── */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.9;
  line-break: strict;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
:lang(en) body { line-height: 1.7; }

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
  text-wrap: balance;
}
:lang(en) h1, :lang(en) h2, :lang(en) h3 { font-weight: 500; line-height: 1.2; letter-spacing: -.01em; }

h1 { font-size: clamp(1.85rem, 1.2rem + 2.9vw, 3.1rem); }
h2 { font-size: clamp(1.45rem, 1.15rem + 1.3vw, 2.05rem); }
h3 { font-size: 1.2rem; line-height: 1.5; }
:lang(zh-Hant) h1 { font-size: clamp(1.5rem, .9rem + 3vw, 3.1rem); }
:lang(en) h1 { font-size: clamp(2.1rem, 1.3rem + 3.4vw, 3.6rem); line-height: 1.12; }
:lang(en) h3 { font-size: 1.3rem; line-height: 1.35; }

p { margin: 0 0 1.15em; }
:lang(en) p { text-wrap: pretty; }  /* 中文用 pretty 會斷出很短的尾行，所以只給英文 */
p:last-child { margin-bottom: 0; }

a {
  color: var(--link);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
  text-decoration-color: color-mix(in srgb, currentColor 45%, transparent);
  transition: text-decoration-color .18s ease, color .18s ease;
}
a:hover { text-decoration-color: currentColor; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--sand); color: #121A23; }

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

/* 不想被拆開的詞組：中文標題用它控制斷行 */
.nb { display: inline-block; }

.skip {
  position: absolute; left: var(--gutter); top: -4rem;
  background: var(--btn-bg); color: var(--btn-text);
  padding: .5rem .9rem; border-radius: 4px; z-index: 10;
  text-decoration: none;
}
.skip:focus { top: .75rem; }

/* ───────── 3 版面 ───────── */
.wrap {
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(56px, 8.5vw, 108px);
  border-top: 1px solid var(--line);
}

/* 左邊小標、右邊內容的兩欄；窄螢幕疊成一欄 */
.split { display: grid; gap: 1.25rem 3rem; }
@media (min-width: 880px) {
  .split { grid-template-columns: 11.5rem minmax(0, 1fr); }
}

.label {
  font-size: .8125rem;
  letter-spacing: .14em;
  color: var(--muted);
  margin: .55rem 0 0;
  line-height: 1.6;
}
:lang(en) .label { letter-spacing: .1em; text-transform: uppercase; font-size: .75rem; }

.prose { max-width: var(--measure); }
.prose h2 { margin-bottom: 1.1em; }
.prose h2 + .lead { margin-top: -.3em; }

.lead {
  font-size: 1.1875rem;
  line-height: 1.85;
  color: var(--text);
}
:lang(en) .lead { font-size: 1.25rem; line-height: 1.6; }

.muted { color: var(--muted); }
.small { font-size: .9375rem; line-height: 1.8; }

/* ───────── 4 頁首頁尾 ───────── */
.site-head { padding-block: 1.4rem; }
.head {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: .4rem 1.75rem;
}
.brand {
  display: inline-flex; align-items: center; gap: .6rem;
  color: var(--text); text-decoration: none;
  font-family: "Newsreader", Georgia, serif;
  font-size: 1.25rem; font-weight: 500; letter-spacing: -.005em;
  margin-right: auto;
  padding-block: .35rem;
}
.brand svg { width: 28px; height: 28px; flex: none; }
.brand .ring { stroke: var(--mark); }
.brand .dot { fill: var(--sand); }

.nav ul {
  display: flex; gap: 1.6rem; list-style: none; margin: 0; padding: 0;
}
.nav a, .lang {
  display: inline-block;
  color: var(--text); text-decoration: none;
  font-size: .9375rem;
  padding-block: .6rem;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 calc(100% - .35rem);
  background-size: 0 1px;
  transition: background-size .22s ease;
}
.nav a:hover, .lang:hover, .nav a[aria-current="page"] { background-size: 100% 1px; }
.nav a[aria-current="page"] { color: var(--link); }
.lang {
  color: var(--muted);
  padding-left: 1.75rem;
  border-left: 1px solid var(--line);
  background-position: 1.75rem calc(100% - .35rem);
}
.lang:hover { background-size: calc(100% - 1.75rem) 1px; }

@media (max-width: 599px) {
  .site-head { padding-block: 1rem .5rem; }
  .nav { order: 3; flex-basis: 100%; border-top: 1px solid var(--line); margin-top: .5rem; }
  .nav ul { gap: 1.5rem; }
  .lang { border-left: 0; padding-left: 0; background-position: 0 calc(100% - .35rem); }
  .lang:hover { background-size: 100% 1px; }
}

.site-foot {
  border-top: 1px solid var(--line);
  padding-block: 3rem 3.5rem;
  font-size: .9375rem;
  color: var(--muted);
}
.foot { display: grid; gap: 2rem 3rem; }
@media (min-width: 760px) { .foot { grid-template-columns: minmax(0, 1fr) auto; } }
.foot .brand { font-size: 1.125rem; margin: 0 0 .4rem; }
.foot p { margin: 0; max-width: 28em; }
.foot ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: .25rem 1.5rem;
}
.foot a { color: var(--text); display: inline-block; padding-block: .4rem; }
.foot .copy { grid-column: 1 / -1; font-size: .875rem; }

/* ───────── 5 元件 ───────── */

/* 首頁開頭 */
.hero { padding-block: clamp(40px, 7vw, 96px) clamp(56px, 9vw, 120px); }
.hero-grid { display: grid; gap: 2.5rem 3rem; align-items: center; }
@media (min-width: 960px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(260px, 360px); }
}
.hero h1 { max-width: 15em; }
:lang(en) .hero h1 { max-width: 13.5em; }
.hero .lead { max-width: 33em; margin-top: 1.6rem; }
.hero .label { margin: 0 0 1.4rem; }
.hero-fig { color: var(--mark); max-width: 360px; width: 100%; justify-self: end; }
.hero-fig svg { display: block; width: 100%; }
@media (max-width: 959px) {
  .hero-fig { max-width: 190px; justify-self: start; order: -1; }
}
.fig-ring { fill: none; stroke: var(--mark); }
.fig-soft { fill: var(--mark-soft); }
.fig-dot { fill: var(--sand); }
.fig-ink { fill: var(--text); }

.actions {
  display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1.75rem;
  margin-top: 2.2rem;
}
.btn {
  display: inline-block;
  background: var(--btn-bg); color: var(--btn-text);
  text-decoration: none;
  padding: .62rem 1.3rem;
  border-radius: 999px;
  font-size: 1rem; line-height: 1.6;
  transition: opacity .18s ease;
}
.btn:hover { opacity: .86; }
.more { font-size: 1rem; }
.more::after { content: " →"; text-decoration: none; display: inline-block; padding-left: .25em; transition: transform .2s ease; }
.more:hover::after { transform: translateX(3px); }

/* 內頁開頭 */
.page-head { padding-block: clamp(36px, 6vw, 80px) clamp(48px, 7vw, 88px); }
.page-head .label { margin: 0 0 1.2rem; }
.page-head h1 { max-width: 16em; }
.page-head .lead { max-width: 32em; margin-top: 1.4rem; }

/* 三個核心（首頁的簡短版） */
.trio { margin: 2.2rem 0 0; padding: 0; border-top: 1px solid var(--line); }
.trio div {
  display: grid; gap: .1rem 2rem;
  padding-block: 1.05rem;
  border-bottom: 1px solid var(--line);
}
@media (min-width: 640px) { .trio div { grid-template-columns: 10.5em minmax(0, 1fr); } }
:lang(en) .trio dt { font-size: 1.2rem; }
.trio dt { font-family: var(--serif); font-weight: 600; font-size: 1.125rem; }
:lang(en) .trio dt { font-weight: 500; }
.trio dd { margin: 0; color: var(--muted); }
.trio + p { margin-top: 2rem; }

/* 編號清單：原則、工作方式 */
.points { list-style: none; margin: 0; padding: 0; counter-reset: pt; max-width: 44rem; }
.points > li {
  counter-increment: pt;
  display: grid; grid-template-columns: 2.75rem minmax(0, 1fr); gap: 0 .75rem;
  padding-block: 1.9rem;
  border-top: 1px solid var(--line);
}
.points > li:first-child { border-top: 0; padding-top: .2rem; }
.points > li:last-child { padding-bottom: 0; }
.points > li::before {
  content: counter(pt, decimal-leading-zero);
  font-family: "Newsreader", Georgia, serif;
  font-size: 1rem; color: var(--link);
  padding-top: .28rem;
  font-variant-numeric: tabular-nums;
}
.points h3 { margin-bottom: .55rem; }
.points p { color: var(--muted); max-width: 34em; }

/* 產品頁：三個核心（完整版） */
.core { display: grid; gap: 1rem 2rem; padding-block: 2.4rem; border-top: 1px solid var(--line); max-width: 46rem; }
.core:first-of-type { border-top: 0; padding-top: 0; }
.core:last-of-type { padding-bottom: 0; }
@media (min-width: 640px) { .core { grid-template-columns: 72px minmax(0, 1fr); } }
.core svg { width: 60px; height: 60px; display: block; margin-top: .2rem; }
.core h3 { font-size: 1.4rem; margin-bottom: .7rem; }
:lang(en) .core h3 { font-size: 1.55rem; }
.core .num { font-family: "Newsreader", Georgia, serif; color: var(--link); font-size: .95rem; display: block; margin-bottom: .15rem; letter-spacing: .04em; }
.core p { max-width: 34em; }

/* 沒有編號的短清單 */
.plain { list-style: none; margin: 0; padding: 0; max-width: var(--measure); }
.plain li { padding-block: 1.25rem; border-top: 1px solid var(--line); }
.plain li:first-child { border-top: 0; padding-top: 0; }
.plain li:last-child { padding-bottom: 0; }
.plain strong { display: block; font-family: var(--serif); font-size: 1.15rem; font-weight: 600; margin-bottom: .25rem; }
:lang(en) .plain strong { font-weight: 500; font-size: 1.25rem; }
.plain span { color: var(--muted); }

/* 深色區塊 */
.band { background: var(--band-bg); color: var(--band-text); border-top: 0; }
.band + .section { border-top: 0; }
.band .label, .band .muted { color: var(--band-muted); }
.band a { color: var(--band-link); }
.band :focus-visible { outline-color: var(--sand); }
.band .status {
  display: inline-flex; align-items: center; gap: .6rem;
  font-size: .875rem; letter-spacing: .08em; color: var(--band-muted);
  margin: 0 0 1.1rem;
}
.band .status::before {
  content: ""; width: .5rem; height: .5rem; border-radius: 50%;
  background: var(--sand);
}

/* 信箱 */
.email {
  font-family: "Newsreader", "Noto Serif TC", Georgia, serif;
  font-size: clamp(1.45rem, 1.1rem + 1.7vw, 2.1rem);
  line-height: 1.4;
  display: inline-block;
  overflow-wrap: anywhere;
}
.email-note { margin-top: .6rem; }

/* 隱私權政策等長文 */
.doc { max-width: var(--measure); }
.doc h2 { font-size: 1.4rem; margin: 3rem 0 .9rem; padding-top: 2.2rem; border-top: 1px solid var(--line); }
:lang(en) .doc h2 { font-size: 1.55rem; }
.doc h2:first-of-type { margin-top: 2.4rem; }
.doc h3 { font-size: 1.0625rem; font-family: var(--sans); font-weight: 500; margin: 1.6rem 0 .4rem; }
:lang(en) .doc h3 { font-size: 1.0625rem; letter-spacing: 0; line-height: 1.5; }
.doc ul { padding-left: 1.2em; margin: 0 0 1.15em; }
.doc li { margin-bottom: .35em; }
.doc li::marker { color: var(--mark); }
.summary {
  background: var(--surface);
  border-left: 2px solid var(--mark);
  padding: 1.15rem 1.4rem;
  margin: 0;
}

/* 404 */
.lost { padding-block: clamp(64px, 12vw, 150px); }
.lost svg { width: 84px; height: 84px; display: block; margin-bottom: 2rem; }
.lost .lead { max-width: 28em; margin-top: 1.2rem; }

/* ───────── 6 動態 ───────── */
[data-reveal] { transition: opacity .7s ease, transform .7s ease; }
[data-reveal].is-waiting { opacity: 0; transform: translateY(14px); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  [data-reveal].is-waiting { opacity: 1; transform: none; }
}

/* ───────── 7 列印 ───────── */
@media print {
  .site-head .nav, .lang, .skip, .hero-fig { display: none; }
  [data-reveal].is-waiting { opacity: 1; transform: none; }
  .band { background: none; color: inherit; border-top: 1px solid #999; }
  body { font-size: 11pt; }
}

.foot .brand { display: inline-flex; padding-block: 0; }

/* 間距小工具（不用行內 style，讓 CSP 可以不開 unsafe-inline） */
.gap-m { margin-bottom: 1.8rem; }
.gap-l { margin-bottom: 2rem; }
.gap-xl { margin-bottom: 2.4rem; }
.push { margin-top: 2rem; }
.push-s { margin-top: 1rem; }
.lost .label { margin: 0 0 1rem; }