/* 亂 Online 官網：共用樣式
   風格取向是「學園」：深藍校服、Logo 的電光藍、米白紙張、金色校徽描邊。
   刻意不做大量動畫或遊戲官網常見的炫光，求簡單、專業、好讀。 */

:root {
  --navy: #1b2740;
  --navy-2: #24345a;
  --accent: #1f5fd1;
  --accent-dark: #1646a0;
  --gold: #c9a24a;
  --paper: #f7f3ea;
  --card: #ffffff;
  --ink: #23262d;
  --muted: #6b6f78;
  --line: #e2dccd;
  --radius: 10px;
  --max: 1120px;
  --serif: "Noto Serif TC", "Songti TC", serif;
  --sans: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.35; margin: 0 0 .5em; color: var(--navy); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- 頂部選單 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--navy);
  border-bottom: 3px solid var(--gold);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: .08em; }
.brand:hover { text-decoration: none; }
.brand img { width: 44px; height: 44px; flex: none; }
.brand small { font-family: var(--sans); font-size: 12px; font-weight: 400; letter-spacing: .2em; color: var(--gold); display: block; line-height: 1; }

.nav { display: flex; gap: 4px; }
.nav a {
  color: #d9deea; padding: 8px 16px; border-radius: 6px; font-size: 15px; letter-spacing: .05em;
}
.nav a:hover { color: #fff; background: var(--navy-2); text-decoration: none; }
.nav a.active { color: #fff; background: var(--accent); }

.nav-toggle { display: none; background: none; border: 0; color: #fff; font-size: 26px; cursor: pointer; padding: 4px 8px; }

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 67px;
    flex-direction: column; background: var(--navy); padding: 8px 16px 16px; gap: 2px;
    border-bottom: 3px solid var(--gold);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; }
}

/* ---------- 首頁主視覺 ---------- */
.hero {
  background:
    linear-gradient(rgba(27,39,64,.82), rgba(27,39,64,.92)),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(255,255,255,.04) 79px 80px),
    var(--navy);
  color: #fff; text-align: center; padding: 96px 0 88px;
}
.hero .crest { width: 180px; height: 180px; margin: 0 auto 16px; filter: drop-shadow(0 6px 24px rgba(60,120,255,.35)); }
.hero h1 { color: #fff; font-size: clamp(34px, 6vw, 56px); letter-spacing: .12em; margin-bottom: 12px; }
.hero p { color: #cdd3e0; font-size: 18px; margin: 0 auto 32px; max-width: 560px; }
.hero .eyebrow { color: var(--gold); letter-spacing: .3em; font-size: 13px; margin-bottom: 12px; }

.btn {
  display: inline-block; padding: 12px 28px; border-radius: 6px; font-weight: 700; letter-spacing: .08em;
  border: 2px solid transparent; transition: background .15s, color .15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { border-color: rgba(255,255,255,.5); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.btn-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- 內頁標題列 ---------- */
.page-head { background: var(--navy); color: #fff; padding: 48px 0 40px; }
.page-head h1 { color: #fff; font-size: 34px; letter-spacing: .1em; margin: 0; }
.page-head p { color: #bfc6d6; margin: 6px 0 0; }

/* ---------- 區塊 ---------- */
section.block { padding: 64px 0; }
section.block.alt { background: #efe9dc; }
.section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 28px; border-bottom: 2px solid var(--navy); padding-bottom: 10px; }
.section-title h2 { margin: 0; font-size: 26px; }
.section-title .en { color: var(--muted); font-size: 13px; letter-spacing: .2em; }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px;
}
.card h3 { font-size: 20px; }
.card p { margin: 0; color: var(--muted); }

/* 三校卡片：上緣一條校色 */
.school { border-top: 5px solid var(--c, var(--accent)); }
.school .badge { font-size: 12px; letter-spacing: .2em; color: var(--c, var(--accent)); font-weight: 700; margin-bottom: 4px; }

/* ---------- 最新消息列表（像公告欄） ---------- */
.news-list { list-style: none; margin: 0; padding: 0; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.news-list li { display: flex; gap: 16px; align-items: baseline; padding: 16px 20px; border-bottom: 1px dashed var(--line); }
.news-list li:last-child { border-bottom: 0; }
.news-list time { color: var(--muted); font-variant-numeric: tabular-nums; flex: none; width: 96px; }
.news-list .title { flex: 1; color: var(--ink); }
.tag { flex: none; font-size: 12px; padding: 2px 10px; border-radius: 99px; color: #fff; background: var(--navy-2); letter-spacing: .05em; }
.tag.event { background: var(--accent); }
.tag.update { background: #2e6b52; }
.tag.notice { background: var(--navy-2); }
@media (max-width: 600px) {
  .news-list li { flex-wrap: wrap; gap: 6px 10px; }
  .news-list time { width: auto; }
  .news-list .title { flex-basis: 100%; }
}

/* 消息內文 */
.article { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 32px; margin-bottom: 20px; }
.article header { display: flex; gap: 12px; align-items: center; margin-bottom: 8px; }
.article header time { color: var(--muted); font-size: 14px; }
.article h2 { font-size: 22px; }
.article p { margin: 0 0 .8em; }
.article:target { outline: 2px solid var(--gold); }
@media (max-width: 600px) { .article { padding: 22px 18px; } }

.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.filters button {
  font: inherit; font-size: 14px; padding: 6px 16px; border-radius: 99px; border: 1px solid var(--line);
  background: var(--card); color: var(--ink); cursor: pointer;
}
.filters button.on { background: var(--navy); color: #fff; border-color: var(--navy); }

/* ---------- 下載 ---------- */
.download-main { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; align-items: stretch; }
@media (max-width: 860px) { .download-main { grid-template-columns: 1fr; } }
.download-main .card h3 { font-size: 22px; }
.download-main .btn { margin-top: 20px; }
.meta { color: var(--muted); font-size: 14px; margin-top: 12px; }

table.spec { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
table.spec th, table.spec td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.spec thead th { background: var(--navy); color: #fff; font-weight: 500; }
table.spec tbody th { width: 120px; color: var(--navy); background: #faf7f0; }
table.spec tr:last-child td, table.spec tr:last-child th { border-bottom: 0; }
.table-scroll { overflow-x: auto; }

ol.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
ol.steps li { counter-increment: s; position: relative; padding: 0 0 20px 52px; }
ol.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 0; width: 34px; height: 34px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; display: grid; place-items: center;
}
ol.steps li strong { display: block; color: var(--navy); }

/* ---------- 指南 ---------- */
.guide-layout { display: grid; grid-template-columns: 220px 1fr; gap: 32px; align-items: start; }
.toc { position: sticky; top: 88px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 0; }
.toc a { display: block; padding: 8px 20px; color: var(--ink); border-left: 3px solid transparent; }
.toc a:hover { background: #faf7f0; text-decoration: none; border-left-color: var(--accent); }
.toc .label { padding: 0 20px 8px; font-size: 12px; letter-spacing: .2em; color: var(--muted); }
@media (max-width: 860px) {
  .guide-layout { grid-template-columns: 1fr; }
  .toc { position: static; }
}
.guide-sec { margin-bottom: 48px; scroll-margin-top: 88px; }
.guide-sec h2 { font-size: 24px; padding-bottom: 8px; border-bottom: 2px solid var(--navy); margin-bottom: 16px; }
.guide-sec p { margin: 0 0 1em; }
kbd {
  font-family: ui-monospace, Consolas, monospace; font-size: 13px; background: #fff; border: 1px solid #c9c2b0;
  border-bottom-width: 2px; border-radius: 4px; padding: 1px 7px;
}
.note { background: #fff8e6; border-left: 4px solid var(--gold); padding: 12px 16px; border-radius: 0 6px 6px 0; color: #5a4a20; font-size: 15px; }

/* ---------- 頁尾 ---------- */
.site-footer { background: #141d31; color: #8e97ab; padding: 36px 0; font-size: 14px; margin-top: 0; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: #c4cad8; }

/* ---------- 選單的註冊按鈕 ---------- */
.nav a.nav-cta { border: 1px solid var(--gold); color: var(--gold); margin-left: 8px; }
.nav a.nav-cta:hover { background: var(--gold); color: var(--navy); }
.nav a.nav-cta.active { background: var(--gold); color: var(--navy); }
@media (max-width: 720px) { .nav a.nav-cta { margin: 6px 0 0; text-align: center; } }

/* ---------- 註冊頁 ---------- */
.reg-wrap { max-width: 720px; }
.reg-tips { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 28px; }
@media (max-width: 600px) { .reg-tips { grid-template-columns: 1fr; } }
.tip { background: var(--navy); color: #c9d0de; border-radius: var(--radius); padding: 16px 18px; font-size: 14px; line-height: 1.6; }
.tip .num { font-family: var(--serif); color: var(--gold); font-size: 22px; font-weight: 900; line-height: 1; }
.tip h3 { color: #fff; font-size: 16px; margin: 8px 0 4px; }
.tip p { margin: 0; }
.reg-note { font-size: 13px; color: var(--muted); text-align: center; margin: 10px 0 0; }

.reg-form fieldset {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--card);
  padding: 20px 24px 8px; margin: 0 0 20px;
}
.reg-form legend { font-family: var(--serif); font-weight: 700; color: var(--navy); font-size: 17px; padding: 0 8px; }
.field { margin-bottom: 16px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
@media (max-width: 600px) {
  .field-row { grid-template-columns: 1fr; }
  .reg-form fieldset { padding: 16px 16px 4px; }
}
.field label { display: block; font-weight: 500; color: var(--navy); margin-bottom: 4px; font-size: 15px; }
.field input {
  width: 100%; font: inherit; padding: 10px 12px; border: 1px solid #cfc8b6; border-radius: 6px; background: #fff; color: var(--ink);
}
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(31,95,209,.15); }
.field .hint { margin: 4px 0 0; font-size: 13px; color: var(--muted); }
.field .error { margin: 4px 0 0; font-size: 13px; color: #b3261e; }
.field.has-error input { border-color: #b3261e; }
.field.has-error .hint { display: none; }

.btn-block { display: block; width: 100%; font: inherit; font-weight: 700; font-size: 17px; padding: 14px; cursor: pointer; border: 0; }
.btn-block:disabled { opacity: .6; cursor: not-allowed; }
.form-msg { color: #b3261e; text-align: center; min-height: 1.5em; margin: 12px 0 0; }

.reg-done { position: fixed; inset: 0; z-index: 50; background: rgba(20,29,49,.8); display: grid; place-items: center; padding: 16px; }
.reg-done[hidden] { display: none; }
.reg-done-card { background: var(--card); border-top: 5px solid var(--gold); border-radius: var(--radius); padding: 36px 40px; text-align: center; max-width: 380px; width: 100%; }
.reg-done .check { width: 64px; height: 64px; margin: 0 auto 12px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 32px; display: grid; place-items: center; }
.reg-done .muted { color: var(--muted); font-size: 14px; }