/* ==========================================================================
   淡江大學教育科技學系 — Design System
   調性對標 逢甲大學 (www.fcu.edu.tw)：沉穩學院風
   淺灰底分區 / 白卡片 / 襯線標題 / 弧形切角 / 低飽和主色
   ========================================================================== */

/* ---------- Tokens ---------- */
:root{
  --brand:        #0E3A6B;
  --brand-deep:   #082744;
  --brand-mid:    #1A5FA8;
  --brand-soft:   #E8EFF7;
  --accent:       #A8801F;
  --accent-soft:  #F6EFDD;

  --ink:      #1A1D21;
  --ink-2:    #4A5158;
  --ink-3:    #767E86;
  --line:     #E2E5E9;
  --line-2:   #D2D7DD;
  --bg:       #FFFFFF;
  --bg-alt:   #F7F7F7;
  --bg-alt-2: #EFF1F4;

  --cat-course:  #1A5FA8;
  --cat-fund:    #A8801F;
  --cat-event:   #2F7D5B;
  --cat-admit:   #B0442F;

  /* 字體
     拉丁字母與數字放在最前面，中文自動落到後面的黑體。
     Source Sans 3 是 Source Han Sans（＝Noto Sans TC）原生的拉丁配對字體，
     humanist 骨架、學術耐讀，數字辨識度高。
     襯線只用在 H1／H2 級的大標，其餘一律黑體。 */
  --font-body: "Source Sans 3", "Noto Sans TC", -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-head: var(--font-body);
  --font-display: "Source Serif 4", "Noto Serif TC", Georgia, serif;
  --font-num: "Source Sans 3", "Noto Sans TC", sans-serif;

  --wrap: 1280px;
  --wrap-narrow: 960px;
  --measure: 38em;   /* 內文行長 ≈ 38 個中文字 */
  --gut: 24px;
  --radius: 4px;
  --shadow-1: 0 1px 3px rgba(16,32,52,.06), 0 1px 2px rgba(16,32,52,.04);
  --shadow-2: 0 6px 24px rgba(16,32,52,.10), 0 2px 6px rgba(16,32,52,.05);
  --shadow-3: 0 16px 48px rgba(16,32,52,.14);
  --ease: cubic-bezier(.22,.61,.36,1);

  --util-h: 36px;
  --head-h: 76px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth; scroll-padding-top:calc(var(--util-h) + var(--head-h) + 16px)}
body{
  margin:0; background:var(--bg); color:var(--ink); overflow-x:clip;
  font-family:var(--font-body);
  /* 流體字級：手機 15.5px、桌機最大 17px，中間平滑過渡 */
  font-size:clamp(15.5px, 0.28vw + 14.6px, 17px);
  line-height:1.8; letter-spacing:.02em; -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
/* 中英數混排時，數字與拉丁字母不要被中文字距拉開 */
:lang(zh) { font-feature-settings:"palt" 0; }
/* 長網址、Email 不撐破版面 */
td, dd, .card__desc, .prose p { overflow-wrap:anywhere; }
img{max-width:100%; height:auto; display:block}
a{color:inherit; text-decoration:none}
button{font:inherit; color:inherit; background:none; border:0; cursor:pointer}
ul,ol{margin:0; padding:0; list-style:none}
h1,h2,h3,h4,h5{margin:0; font-weight:600; line-height:1.35; letter-spacing:.5px}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
:focus-visible{outline:3px solid var(--brand-mid); outline-offset:2px; border-radius:2px}

/* ---------- Layout ---------- */
.wrap{width:100%; max-width:var(--wrap); margin-inline:auto; padding-inline:var(--gut)}
.wrap-narrow{width:100%; max-width:var(--wrap-narrow); margin-inline:auto; padding-inline:var(--gut)}
.section{padding:84px 0}
.section--alt{background:var(--bg-alt)}
.section--tight{padding:56px 0}
.grid{display:grid; gap:28px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.sr-only{position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0}
.skip-link{position:absolute; left:-9999px; top:0; z-index:999; background:var(--brand); color:#fff; padding:12px 20px}
.skip-link:focus{left:0}

/* ---------- Typography ---------- */
.eyebrow{
  font-family:var(--font-body); font-size:13px; font-weight:700; letter-spacing:.22em;
  text-transform:uppercase; color:var(--brand-mid); margin-bottom:14px; display:block;
}
.eyebrow::after{content:""; display:block; width:32px; height:2px; background:var(--accent); margin-top:10px}
.eyebrow--center{text-align:center}
.eyebrow--center::after{margin-inline:auto}
/* 襯線只保留在這幾個大標上（.h-display / .h-sec / .page-hero h1 / .prose h2 / .cta-band h2） */
.h-display{font-family:var(--font-display); font-size:clamp(34px,4.4vw,55px); font-weight:700; line-height:1.22}
.h-sec{font-family:var(--font-display); font-size:clamp(26px,3vw,36px); font-weight:600; line-height:1.3}
.h-card{font-family:var(--font-head); font-size:19px; font-weight:700; line-height:1.5}
.lede{font-size:17px; color:var(--ink-2); line-height:1.9; max-width:66ch}
.muted{color:var(--ink-3)}
.sec-head{margin-bottom:44px}
.sec-head--center{text-align:center}
.sec-head--row{display:flex; align-items:flex-end; justify-content:space-between; gap:24px; flex-wrap:wrap}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:13px 28px; border-radius:2px; font-size:15px; font-weight:600; letter-spacing:.06em;
  border:1px solid transparent; transition:all .3s var(--ease); cursor:pointer;
}
.btn svg{width:15px; height:15px; flex:none; transition:transform .3s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn--primary{background:var(--brand); color:#fff}
.btn--primary:hover{background:var(--brand-mid)}
.btn--ghost{border-color:var(--line-2); color:var(--ink)}
.btn--ghost:hover{border-color:var(--brand); background:var(--brand); color:#fff}
.btn--light{border-color:rgba(255,255,255,.5); color:#fff}
.btn--light:hover{background:#fff; color:var(--brand); border-color:#fff}
.btn--sm{padding:9px 18px; font-size:14px}
.link-more{display:inline-flex; align-items:center; gap:8px; font-size:15px; font-weight:600; color:var(--brand-mid); border-bottom:1px solid transparent; transition:border-color .25s}
.link-more:hover{border-color:var(--brand-mid)}
.link-more svg{width:14px;height:14px; transition:transform .3s var(--ease)}
.link-more:hover svg{transform:translateX(4px)}

/* ---------- Utility bar ---------- */
.utilbar{background:var(--brand-deep); color:rgba(255,255,255,.82); height:var(--util-h); font-size:13px; position:relative; z-index:60}
.utilbar .wrap{height:100%; display:flex; align-items:center; justify-content:flex-end; gap:0}
.utilbar a{
  padding:0 14px; line-height:var(--util-h); transition:color .2s; white-space:nowrap;
  display:inline-flex; align-items:center; gap:6px; height:var(--util-h);
}
.utilbar a svg{width:11px; height:11px; flex:none; opacity:.7}
.utilbar a:hover{color:#fff}
.utilbar .sep{width:1px; height:13px; background:rgba(255,255,255,.22)}
.utilbar__id a{color:#fff; font-weight:500}
.utilbar__search{display:flex; align-items:center; gap:7px; padding-left:16px}
.utilbar__search svg{width:15px;height:15px}

/* ---------- Header ---------- */
/* #site-header 只是 JS 注入用的容器。若讓它保留 box，sticky 的 .site-head
   只能在這個 112px 高的父層裡「黏」，捲過去就會消失。用 display:contents
   讓 utilbar 與 .site-head 成為 body 的直接子元素，sticky 才有整頁的作用範圍。 */
#site-header{display:contents}
.site-head{
  position:sticky; top:0; z-index:50; height:var(--head-h);
  background:#fff; border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease);
}
.site-head.is-stuck{box-shadow:var(--shadow-2)}
.site-head .wrap{height:100%; display:flex; align-items:center; justify-content:space-between; gap:28px}
.brand{display:flex; align-items:center; flex:none}
.brand__logo{height:38px; width:auto}

/* 頁首行動呼籲（招生站主要目標） */
.head-cta{
  display:inline-flex; align-items:center; gap:8px; flex:none; margin-left:20px;
  padding:10px 20px; background:var(--brand); color:#fff; border-radius:2px;
  font-size:14.5px; font-weight:600; letter-spacing:.04em; transition:background .3s var(--ease);
}
.head-cta svg{width:14px;height:14px; transition:transform .3s var(--ease)}
.head-cta:hover{background:var(--brand-mid)}
.head-cta:hover svg{transform:translateX(4px)}
@media (max-width:1240px){.head-cta{display:none}}

.nav{display:flex; align-items:stretch; height:100%; margin-left:auto}
.nav__item{position:relative; display:flex; align-items:center}
.nav__link{
  display:flex; align-items:center; height:100%; padding:0 17px;
  font-size:15.5px; font-weight:500; color:var(--ink); position:relative; transition:color .25s;
}
.nav__link::after{
  content:""; position:absolute; left:17px; right:17px; bottom:22px; height:2px;
  background:var(--brand); transform:scaleX(0); transform-origin:left; transition:transform .3s var(--ease);
}
.nav__item:hover .nav__link, .nav__item.is-current .nav__link{color:var(--brand)}
.nav__item:hover .nav__link::after, .nav__item.is-current .nav__link::after{transform:scaleX(1)}

.nav__panel{
  position:absolute; top:100%; left:50%; transform:translate(-50%,10px);
  min-width:220px; background:#fff; border:1px solid var(--line); border-top:2px solid var(--brand);
  box-shadow:var(--shadow-2); padding:10px 0; opacity:0; visibility:hidden;
  transition:opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
}
.nav__item:hover .nav__panel, .nav__item:focus-within .nav__panel{opacity:1; visibility:visible; transform:translate(-50%,0)}
/* 最後一項靠右展開，避免超出視窗右緣造成水平捲動 */
.nav__item:last-child .nav__panel{left:auto; right:0; transform:translate(0,10px)}
.nav__item:last-child:hover .nav__panel,
.nav__item:last-child:focus-within .nav__panel{transform:translate(0,0)}
.nav__panel a{
  display:block; padding:10px 24px; font-size:14.5px; color:var(--ink-2); white-space:nowrap;
  border-left:2px solid transparent; transition:all .2s;
}
.nav__panel a:hover{background:var(--brand-soft); color:var(--brand); border-left-color:var(--brand)}

.nav-toggle{display:none; width:44px;height:44px; align-items:center; justify-content:center; flex:none}
.nav-toggle span{display:block; width:22px; height:2px; background:var(--ink); position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:""; position:absolute; left:0; width:22px; height:2px; background:var(--ink); transition:transform .3s var(--ease)}
.nav-toggle span::before{top:-7px} .nav-toggle span::after{top:7px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span::after{transform:translateY(-7px) rotate(-45deg)}

/* ---------- Footer ---------- */
.site-foot{background:var(--brand-deep); color:rgba(255,255,255,.72); font-size:14.5px}
.foot-top{padding:64px 0 48px; border-bottom:1px solid rgba(255,255,255,.12)}
.foot-top .wrap{display:grid; grid-template-columns:1.15fr 1fr; gap:56px}
.foot-logo{height:46px; width:auto; margin-bottom:28px}
.foot-note{
  margin-top:24px; padding-top:20px; border-top:1px solid rgba(255,255,255,.12);
  font-size:13.5px; color:rgba(255,255,255,.55); line-height:1.8; max-width:46ch;
}
.foot-note a{color:rgba(255,255,255,.85); text-decoration:underline}
.foot-note a:hover{color:#fff}
.sidenav__note{
  margin-top:22px; padding-top:18px; border-top:1px solid var(--line);
  font-size:13px; color:var(--ink-3); line-height:1.8;
}
.sidenav__note a{color:var(--brand-mid); text-decoration:underline}
@media (max-width:900px){.sidenav__note{display:none}}
.foot-info dl{display:grid; grid-template-columns:auto 1fr; gap:9px 18px; margin:0}
.foot-info dt{color:rgba(255,255,255,.45); font-size:13.5px; white-space:nowrap}
.foot-info dd{margin:0; color:rgba(255,255,255,.88)}
.foot-info a:hover{color:#fff; text-decoration:underline}
.foot-social{display:flex; gap:10px; margin-top:26px; flex-wrap:wrap}
.foot-social a{
  display:inline-flex; align-items:center; gap:8px; padding:8px 15px; font-size:13px;
  border:1px solid rgba(255,255,255,.22); border-radius:2px; transition:all .25s;
}
.foot-social a:hover{background:#fff; color:var(--brand-deep); border-color:#fff}
.foot-social svg{width:15px;height:15px}
.foot-links{display:grid; grid-template-columns:repeat(3,1fr); gap:32px}
.foot-links h4{font-size:14px; color:#fff; letter-spacing:.12em; margin-bottom:16px; font-weight:600}
.foot-links li{margin-bottom:9px}
.foot-links a{font-size:14px; transition:color .2s}
.foot-links a:hover{color:#fff}
.foot-bot{padding:22px 0; font-size:13px; color:rgba(255,255,255,.5)}
.foot-bot .wrap{display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap; align-items:center}
.foot-bot nav{display:flex; gap:20px; flex-wrap:wrap}
.foot-bot a:hover{color:#fff}
.foot-credit{
  padding:16px 0; background:rgba(0,0,0,.22); font-size:13px;
  color:rgba(255,255,255,.5); letter-spacing:.04em;
}
.foot-credit .wrap{display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap}
.foot-credit a{color:rgba(255,255,255,.72); transition:color .25s}
.foot-credit a:hover{color:#fff}
.foot-credit__by a{border-bottom:1px solid rgba(255,255,255,.3)}
.foot-credit__by a:hover{border-color:#fff}
/* 創用 CC 標示 */
.foot-cc{display:inline-flex; align-items:center; gap:5px}
.foot-cc span{
  width:20px; height:20px; border-radius:50%; border:1px solid rgba(255,255,255,.45);
  display:inline-flex; align-items:center; justify-content:center;
  font-size:9px; font-weight:700; letter-spacing:0; margin-right:1px;
}
.foot-cc span:last-of-type{margin-right:8px}
.foot-cc:hover span{border-color:#fff}
@media (max-width:700px){ .foot-credit .wrap{justify-content:center; text-align:center} }

/* ---------- Cards ---------- */
.card{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;
  display:flex; flex-direction:column; transition:transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.card:hover{transform:translateY(-5px); box-shadow:var(--shadow-2); border-color:transparent}
.card__media{position:relative; aspect-ratio:16/10; overflow:hidden; background:var(--bg-alt-2)}
.card__media img,.card__media .ph{width:100%; height:100%; object-fit:cover; transition:transform .7s var(--ease)}
.card:hover .card__media img,.card:hover .card__media .ph{transform:scale(1.06)}
.card__body{padding:26px 26px 28px; display:flex; flex-direction:column; flex:1}
.card__title{font-family:var(--font-head); font-size:18px; font-weight:600; line-height:1.55; margin-bottom:12px; transition:color .25s}
.card:hover .card__title{color:var(--brand-mid)}
.card__desc{font-size:14.5px; color:var(--ink-2); line-height:1.85; flex:1}
.card__meta{display:flex; align-items:center; gap:12px; margin-bottom:13px; font-size:13px}
.card__date{color:var(--ink-3); letter-spacing:.05em; font-variant-numeric:tabular-nums}

.tag{display:inline-block; padding:3px 11px; font-size:12px; font-weight:600; letter-spacing:.06em; border-radius:2px; background:var(--brand-soft); color:var(--brand)}
.tag--course{background:#E7F0FA; color:var(--cat-course)}
.tag--fund{background:var(--accent-soft); color:var(--cat-fund)}
.tag--event{background:#E4F2EC; color:var(--cat-event)}
.tag--admit{background:#FBEAE6; color:var(--cat-admit)}

/* 圖片佔位（尚未有正式照片時使用） */
.ph{
  display:flex; align-items:center; justify-content:center; text-align:center;
  background:
    linear-gradient(135deg, rgba(14,58,107,.92), rgba(26,95,168,.82)),
    repeating-linear-gradient(45deg, rgba(255,255,255,.05) 0 2px, transparent 2px 9px);
  color:rgba(255,255,255,.9); font-family:var(--font-head); font-size:15px; letter-spacing:.16em; padding:20px;
}
.ph--alt{background:linear-gradient(135deg,#2B4A6E,#4A6A8C), repeating-linear-gradient(45deg, rgba(255,255,255,.05) 0 2px, transparent 2px 9px)}
.ph--gold{background:linear-gradient(135deg,#7A5C12,#A8801F), repeating-linear-gradient(45deg, rgba(255,255,255,.06) 0 2px, transparent 2px 9px)}

/* ---------- Scroll reveal ---------- */
[data-reveal]{opacity:0; transform:translateY(26px); transition:opacity .8s var(--ease), transform .8s var(--ease)}
[data-reveal].is-in{opacity:1; transform:none}
[data-reveal-delay="1"]{transition-delay:.09s}
[data-reveal-delay="2"]{transition-delay:.18s}
[data-reveal-delay="3"]{transition-delay:.27s}
[data-reveal-delay="4"]{transition-delay:.36s}
[data-reveal-delay="5"]{transition-delay:.45s}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important; transition-duration:.01ms !important}
  [data-reveal]{opacity:1; transform:none}
}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .nav__link{padding:0 12px; font-size:15px}
  .nav__link::after{left:12px; right:12px}
}
@media (max-width:1024px){
  :root{--head-h:66px}
  .nav-toggle{display:flex}
  .nav{
    position:fixed; top:calc(var(--util-h) + var(--head-h)); left:0; right:0; bottom:0;
    flex-direction:column; align-items:stretch; height:auto; background:#fff;
    overflow-y:auto; padding:8px 0 60px; margin:0;
    transform:translateX(100%); transition:transform .4s var(--ease); border-top:1px solid var(--line);
  }
  .nav.is-open{transform:none}
  /* 選單開啟：鎖住背景捲動，並把頁首固定在視窗頂端，
     否則 sticky 頁首會隨著已捲動的位置消失，關閉鈕就不見了 */
  html.is-nav-open, html.is-nav-open body{overflow:hidden}
  html.is-nav-open .utilbar{position:fixed; top:0; left:0; right:0}
  html.is-nav-open .site-head{position:fixed; top:var(--util-h); left:0; right:0; box-shadow:var(--shadow-1)}
  .nav__item{flex-direction:column; align-items:stretch; border-bottom:1px solid var(--line)}
  .nav__link{height:auto; padding:16px var(--gut); font-size:16px; justify-content:space-between}
  .nav__link::after{display:none}
  .nav__panel{
    position:static; transform:none; opacity:1; visibility:visible; box-shadow:none;
    border:0; border-top:1px solid var(--line); background:var(--bg-alt); padding:6px 0;
    display:none; min-width:0;
  }
  .nav__item.is-expanded .nav__panel{display:block}
  .nav__panel a{padding:12px var(--gut) 12px calc(var(--gut) + 16px)}
  .g-4{grid-template-columns:repeat(2,1fr)}
  .foot-top .wrap{grid-template-columns:1fr; gap:44px}
}
@media (max-width:820px){
  .section{padding:60px 0}
  .g-3,.g-2{grid-template-columns:1fr}
  .brand__logo{height:32px}
}
/* 平板：行長略收，避免橫向時一行過長 */
@media (min-width:601px) and (max-width:1024px){
  :root{--measure:34em}
}
@media (max-width:600px){
  :root{--gut:18px; --measure:100%}
  .g-4{grid-template-columns:1fr}
  .foot-links{grid-template-columns:1fr; gap:26px}
  .sec-head{margin-bottom:32px}
  /* 手機上這些輔助文字原本偏小，補到可讀尺寸 */
  .card__desc, .quick__d, .lede{font-size:15px}
  .prose p, .prose ul.bullet li, .prose ol.num li{line-height:1.9}
  /* 觸控目標至少 44px */
  .link-more, .filters button, .sidenav a{min-height:44px; display:inline-flex; align-items:center}
  .u-hide-sm{display:none !important}
  .utilbar .wrap{justify-content:space-between}
  .utilbar a{padding:0 8px}
  .brand__logo{height:28px}
  /* 佔位說明文字在手機上省略，避免與主視覺文案打架 */
  .hero__bg .ph{display:none}
}