/* 学习站在资讯站样式（style.css）基础上的补充；主色偏紫以区分两个站 */
.logo.learn { color: var(--violet); }
.logo.learn svg { filter: drop-shadow(0 0 6px var(--violet)); }
.logo.learn b { color: var(--cyan); }
.top-search input { width: 160px; padding: 5px 12px; border-radius: 6px; border: 1px solid var(--line); background: var(--panel-solid); color: var(--fg); font-family: var(--mono); font-size: 12.5px; outline: none; }
.top-search input:focus { border-color: var(--cyan); width: 200px; }
.top-search { margin-left: auto; }
.top-search + .me { margin-left: 10px; }
.kicker { color: var(--violet); letter-spacing: 3px; font-size: 12px; margin: 0; }

/* 登录 */
.login-box { max-width: 380px; margin: 9vh auto; padding: 32px 30px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); box-shadow: 0 0 40px rgba(157, 92, 255, .12); }
.login-box h1 { margin: 6px 0 2px; font-size: 24px; }
.login-box form { display: flex; flex-direction: column; gap: 14px; margin: 22px 0 14px; }
.login-box label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.login-box input { padding: 10px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel-solid); color: var(--fg); font-size: 15px; outline: none; }
.login-box input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0, 240, 255, .15); }
.error { color: var(--pink); font-size: 13px; margin: 12px 0 0; }

.btn-primary { display: inline-block; padding: 9px 18px; border: 0; border-radius: 8px; cursor: pointer; font: 600 14px inherit;
  color: #05070d; background: linear-gradient(90deg, var(--cyan), var(--violet)); box-shadow: 0 0 18px rgba(0, 240, 255, .25); }
.btn-primary:hover { color: #05070d; filter: brightness(1.1); }

/* 首页 */
.hero { margin: 40px 0 10px; padding: 30px 32px; border-radius: 16px; border: 1px solid var(--line);
  background: radial-gradient(ellipse at 0% 0%, rgba(157, 92, 255, .2), transparent 60%), var(--panel); }
.hero h1 { font-size: 34px; margin: 6px 0 10px; }
.hero-stats { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 18px; }
.hero-stats b { font-size: 26px; color: var(--lime); }
.hero-stats .progress { flex: 1; min-width: 160px; }
.sec-title { font: 600 15px var(--mono); color: var(--cyan); letter-spacing: 2px; margin: 34px 0 12px; }
.sec-title::before { content: "## "; color: var(--violet); }
.progress { height: 6px; border-radius: 6px; background: rgba(255, 255, 255, .06); overflow: hidden; }
.progress i { display: block; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--violet)); box-shadow: 0 0 10px var(--cyan); }
.paths { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.path-card { padding: 16px 18px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel); }
.path-card p { margin: 6px 0 12px; font-size: 13px; color: var(--muted); }
.path-steps { display: flex; gap: 6px; flex-wrap: wrap; }
.path-steps a { font: 12px var(--mono); padding: 2px 10px; border-radius: 4px; border: 1px solid var(--line); }
.path-steps a.done { color: var(--bg); background: var(--lime); border-color: var(--lime); }
.level-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; margin: 14px 0; }
.level-card { display: flex; flex-direction: column; gap: 6px; padding: 16px 18px; border-radius: 12px; border: 1px solid var(--line); background: var(--panel); transition: border-color .2s, transform .2s; }
.level-card:hover { border-color: rgba(157, 92, 255, .6); transform: translateY(-2px); color: inherit; }
.level-card p { margin: 0; font-size: 13.5px; color: #a9b8cd; }
.level-head { display: flex; align-items: baseline; gap: 10px; }
.level-head b { color: #eef4ff; font-size: 17px; }
.level-head .meta { margin-left: auto; }
.level-num { font-size: 20px; font-weight: 800; color: var(--violet); text-shadow: 0 0 12px rgba(157, 92, 255, .5); }
.level-foot { display: flex; align-items: center; gap: 10px; margin-top: auto; padding-top: 8px; font-size: 12px; color: var(--muted); }
.level-foot .progress { flex: 1; }

/* 级别页 */
.lesson-list { list-style: none; padding: 0; margin: 18px 0; }
.lesson-list .card { display: flex; align-items: center; gap: 16px; }
.lesson-num { min-width: 42px; font-size: 18px; font-weight: 700; color: var(--violet); }
.lesson-main { flex: 1; }
.lesson-main .title { margin: 0 0 2px; font-size: 16px; }
.has-ppt { color: var(--pink); }
.state { font-size: 12px; color: var(--muted); }
.card.done .state { color: var(--lime); }
.card.done::before { background: var(--lime); opacity: 1; }
.card.visited::before { opacity: .8; }
.tag.ok { border-color: var(--lime); color: var(--lime); }

/* 下载 */
.downloads { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 18px 0; padding: 12px 14px; border-radius: 10px; border: 1px dashed rgba(157, 92, 255, .5); background: rgba(157, 92, 255, .06); }
.dl-head { font-size: 11px; color: var(--violet); letter-spacing: 2px; width: 100%; }
.dl { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel-solid); }
.dl:hover { border-color: var(--cyan); }
.dl b { display: block; font-size: 13.5px; color: #eef4ff; font-weight: 600; }
.dl small { color: var(--muted); font-size: 11.5px; }
.dl-icon { font: 700 10.5px var(--mono); padding: 6px 5px; border-radius: 4px; color: #05070d; }
.dl-icon.ppt { background: #ff8a4c; }
.dl-icon.doc { background: #5aa2ff; }

/* 课程页 */
.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 22px; align-items: start; }
.crumbs a { color: var(--violet); }
.term { color: var(--lime); font-weight: 600; }
.content .table-wrap { overflow-x: auto; }
.content table { display: table; }
.content blockquote strong { color: var(--cyan); }
.content hr { border: 0; border-top: 1px dashed var(--line); margin: 28px 0; }
.complete { display: flex; align-items: center; gap: 14px; margin: 34px 0 10px; padding-top: 18px; border-top: 1px solid var(--line); }
.done-note { color: var(--lime); font-size: 13px; }
.prev-next { display: flex; justify-content: space-between; gap: 12px; margin-top: 20px; }
.prev-next a { flex: 1; max-width: 48%; padding: 12px 14px; border-radius: 8px; border: 1px solid var(--line); font-size: 14px; }
.prev-next a.next { text-align: right; }
.prev-next small { display: block; color: var(--muted); font-family: var(--mono); font-size: 11.5px; }
.side { position: sticky; top: 80px; margin-top: 26px; display: flex; flex-direction: column; gap: 14px; max-height: calc(100vh - 100px); overflow: auto; }
.side-box { padding: 14px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel); }
.side-box h3 { margin: 0 0 10px; font: 600 12.5px var(--mono); color: var(--cyan); letter-spacing: 2px; }
.toc, .news { list-style: none; padding: 0; margin: 0; font-size: 13px; }
.toc li { margin: 6px 0; }
.toc li.lv3 { padding-left: 12px; font-size: 12.5px; }
.toc a { color: #a9b8cd; }
.news li { margin: 0 0 10px; line-height: 1.5; }
.news small { display: block; color: var(--muted); font-size: 11px; }
.logout { margin-left: auto; }

@media (max-width: 900px) {
  .lesson-layout { grid-template-columns: 1fr; }
  .side { position: static; max-height: none; }
  .top-search { margin-left: 0; }
}
.pw-form { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.pw-form input { flex: 1; min-width: 180px; padding: 9px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel-solid); color: var(--fg); outline: none; }
.pw-form input:focus { border-color: var(--cyan); }