:root {
  --ink: #102a43;
  --ink-2: #243b53;
  --blue: #2f5d7c;
  --paper: #edf1f3;
  --paper-2: #f7f9fa;
  --white: #ffffff;
  --amber: #c28a33;
  --amber-soft: #efe1c7;
  --brick: #7b3240;
  --teal: #275b5b;
  --mist: #b9c7d0;
  --line: rgba(16, 42, 67, 0.18);
  --shadow: 0 22px 54px rgba(16, 42, 67, 0.13);
  --serif: "Songti SC", "STSong", "Noto Serif SC", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --mono: "SFMono-Regular", "Cascadia Mono", "Roboto Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 4px; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 200; padding: 10px 16px; color: white; background: var(--ink); }
.skip-link:focus { top: 16px; }

.demo-ribbon {
  padding: 5px 24px;
  color: rgba(255,255,255,.84);
  background: var(--ink);
  font: 11px/1.5 var(--mono);
  text-align: center;
  letter-spacing: .13em;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: 76px;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) auto minmax(240px, 1fr);
  align-items: center;
  gap: 28px;
  padding: 10px clamp(22px, 4vw, 72px);
  background: rgba(247,249,250,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; width: max-content; text-decoration: none; }
.brand-seal { display: grid; place-items: center; width: 42px; height: 42px; color: var(--white); background: var(--brick); font: 22px var(--serif); }
.brand strong { display: block; font: 700 18px/1.2 var(--serif); letter-spacing: .14em; }
.brand small { display: block; margin-top: 5px; color: #627d98; font: 8px/1 var(--mono); letter-spacing: .12em; }
.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a { position: relative; padding: 11px 0; color: #486581; font-size: 14px; text-decoration: none; }
.main-nav a::after { content: ""; position: absolute; left: 50%; bottom: 2px; width: 0; height: 2px; background: var(--brick); transition: .25s; }
.main-nav a:hover::after, .main-nav a.active::after { left: 0; width: 100%; }
.main-nav a.active { color: var(--ink); font-weight: 650; }
.admin-entry { justify-self: end; color: var(--ink); font-size: 13px; font-weight: 650; text-decoration: none; border-bottom: 1px solid currentColor; }
.admin-entry span { color: var(--brick); }
.mobile-admin-link { display: none; }
.mobile-menu { display: none; }

.page { animation: page-in .5s ease-out both; }
@keyframes page-in { from { opacity: 0; transform: translateY(7px); } }
.eyebrow { margin: 0 0 12px; color: var(--brick); font: 700 11px/1.4 var(--mono); letter-spacing: .18em; text-transform: uppercase; }
.section-heading { max-width: 1180px; margin: 0 auto 36px; display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 20px; }
.section-heading h2 { margin: 0; max-width: 720px; font: 700 clamp(29px,4vw,50px)/1.16 var(--serif); letter-spacing: .03em; }
.section-heading p { max-width: 430px; margin: 0; color: #526d82; }
.text-link { display: inline-flex; gap: 9px; align-items: center; color: var(--brick); font-weight: 650; text-decoration: none; border-bottom: 1px solid rgba(123,50,64,.35); }
.text-link::after { content: "→"; }

.hero {
  position: relative;
  min-height: calc(100vh - 104px);
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(480px, 1.12fr);
  overflow: hidden;
  background: var(--paper-2);
}
.hero-copy { z-index: 2; display: flex; flex-direction: column; justify-content: center; padding: clamp(58px, 9vw, 130px) clamp(30px, 6vw, 100px); }
.hero-copy h1 { margin: 0; font: 700 clamp(52px, 7.1vw, 112px)/.96 var(--serif); letter-spacing: .04em; }
.hero-copy h1 span { display: block; margin: 18px 0 0 1.15em; color: var(--brick); font-size: .58em; }
.hero-lead { max-width: 540px; margin: 34px 0 0; color: #3e5c70; font: 17px/1.9 var(--serif); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 38px; }
.primary-btn, .ghost-btn { display: inline-flex; justify-content: center; align-items: center; min-height: 46px; padding: 0 21px; text-decoration: none; font-weight: 650; border: 1px solid var(--ink); border-radius: 1px; transition: transform .2s, box-shadow .2s, background .2s; }
.primary-btn { color: white; background: var(--ink); }
.ghost-btn { background: transparent; }
.primary-btn:hover, .ghost-btn:hover { transform: translateY(-2px); box-shadow: 7px 7px 0 var(--amber-soft); }
.hero-visual { position: relative; min-height: 620px; overflow: hidden; background: #0f2638; }
.triptych-full { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; opacity: .9; filter: saturate(.77) contrast(1.04); }
.hero-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(16,42,67,.7), transparent 28%, transparent 74%, rgba(16,42,67,.22)); pointer-events: none; }
.hero-caption { position: absolute; z-index: 2; right: 22px; top: 22px; display: grid; gap: 3px; padding: 11px 13px; color: white; background: rgba(16,42,67,.78); font: 10px var(--mono); letter-spacing: .1em; }
.hero-caption strong { font-size: 13px; }
.hero-index { position: absolute; z-index: 2; inset: auto 0 0; display: grid; grid-template-columns: repeat(3, 1fr); color: white; background: rgba(16,42,67,.89); }
.hero-index a { min-height: 78px; padding: 15px 18px; display: flex; flex-direction: column; justify-content: center; text-decoration: none; border-left: 1px solid rgba(255,255,255,.18); }
.hero-index a:hover { background: var(--brick); }
.hero-index strong { font: 18px var(--serif); }
.hero-index small { margin-top: 5px; color: rgba(255,255,255,.7); font: 9px var(--mono); letter-spacing: .12em; }
.catalog-number { position: absolute; left: 25px; bottom: 25px; z-index: 3; color: rgba(255,255,255,.35); font: 52px/1 var(--mono); }

.timeline-ruler { position: relative; padding: 56px clamp(24px,5vw,80px) 50px; color: white; background: var(--ink); overflow: hidden; }
.timeline-ruler::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 1px; background: rgba(255,255,255,.24); }
.timeline-ruler ol { position: relative; max-width: 1180px; margin: 0 auto; padding: 0; display: grid; grid-template-columns: repeat(7,1fr); list-style: none; }
.timeline-ruler li { position: relative; padding-top: 30px; font: 10px var(--mono); color: #9fb3c4; }
.timeline-ruler li::before { content: ""; position: absolute; top: -3px; width: 1px; height: 20px; background: var(--amber); }
.timeline-ruler li:first-child::after { content: "三位教师的教育时间"; position: absolute; left: 0; top: -42px; color: white; white-space: nowrap; font: 15px var(--serif); letter-spacing: .12em; }

.featured { padding: 96px clamp(22px,5vw,72px); }
.teacher-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.teacher-card { position: relative; min-width: 0; color: inherit; background: var(--paper-2); border: 1px solid var(--line); text-decoration: none; box-shadow: 0 0 0 transparent; transition: transform .24s, box-shadow .24s; }
.teacher-card::before { content: attr(data-index); position: absolute; z-index: 2; top: -10px; left: 18px; padding: 5px 11px; color: white; background: var(--brick); font: 10px var(--mono); letter-spacing: .1em; }
.teacher-card:hover { transform: translateY(-7px); box-shadow: var(--shadow); }
.teacher-card-visual { aspect-ratio: 4/4.35; overflow: hidden; background: #17384f; }
.portrait-crop { display: block; width: 300%; height: 100%; max-width: none; object-fit: cover; }
.portrait-crop.lin { transform: translateX(0); }
.portrait-crop.zhou { transform: translateX(-33.333%); }
.portrait-crop.shen { transform: translateX(-66.666%); }
.teacher-card-body { position: relative; padding: 28px 25px 25px; }
.teacher-card-body h3 { margin: 0; font: 700 27px var(--serif); letter-spacing: .08em; }
.teacher-card-body h3 small { display: block; margin-top: 8px; color: #627d98; font: 10px var(--mono); letter-spacing: .1em; }
.teacher-card-body p { margin: 15px 0; color: #526d82; font-size: 14px; }
.card-meta { display: flex; justify-content: space-between; gap: 12px; padding-top: 14px; border-top: 1px solid var(--line); color: #486581; font: 10px var(--mono); }

.collection { padding: 92px clamp(22px,5vw,72px); background: #dfe7eb; }
.collection-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1.15fr .85fr; gap: 26px; }
.feature-file { min-height: 410px; display: grid; grid-template-columns: .9fr 1.1fr; background: var(--ink); color: white; }
.feature-file-visual { position: relative; overflow: hidden; background: var(--brick); }
.feature-file-visual::before { content: "1972"; position: absolute; inset: auto 16px 8px; color: rgba(255,255,255,.18); font: 84px var(--mono); }
.feature-file-visual::after { content: "一生一门课"; position: absolute; top: 28px; right: 20px; writing-mode: vertical-rl; letter-spacing: .25em; font: 18px var(--serif); }
.blackboard-lines { position: absolute; inset: 32% 12% 12%; border: 1px solid rgba(255,255,255,.35); transform: rotate(-3deg); }
.blackboard-lines::before, .blackboard-lines::after { content: ""; position: absolute; left: 14%; right: 10%; height: 1px; background: rgba(255,255,255,.25); transform: rotate(18deg); }
.blackboard-lines::before { top: 30%; }.blackboard-lines::after { top: 62%; transform: rotate(-12deg); }
.feature-file-copy { display: flex; flex-direction: column; justify-content: center; padding: 50px; }
.feature-file-copy h3 { margin: 0; font: 32px var(--serif); }
.feature-file-copy p { color: #bcccdc; }
.collection-stack { display: grid; gap: 16px; }
.collection-card { position: relative; min-height: 123px; padding: 24px 92px 24px 24px; color: var(--ink); background: var(--paper-2); border-left: 5px solid var(--amber); }
.collection-card:nth-child(2) { border-color: var(--brick); }.collection-card:nth-child(3) { border-color: var(--teal); }
.collection-card h3 { margin: 0 0 7px; font: 22px var(--serif); }
.collection-card p { margin: 0; color: #627d98; font-size: 13px; }
.collection-card b { position: absolute; right: 22px; top: 22px; color: #9fb3c4; font: 38px var(--mono); }

.method { padding: 90px clamp(22px,5vw,72px); background: var(--paper-2); }
.method-wrap { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; align-items: start; }
.method-copy { position: sticky; top: 120px; }
.method-copy h2 { margin: 0; font: 44px/1.2 var(--serif); }
.method-copy p { color: #526d82; }
.method-list { border-top: 1px solid var(--line); }
.method-item { display: grid; grid-template-columns: 92px 1fr; gap: 22px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.method-item time { color: var(--brick); font: 12px var(--mono); }
.method-item h3 { margin: 0 0 7px; font: 22px var(--serif); }.method-item p { margin: 0; color: #627d98; }

.archive-hero { padding: 80px clamp(22px,5vw,72px) 50px; background: var(--ink); color: white; }
.archive-hero-inner { max-width: 1180px; margin: 0 auto; }
.archive-hero h1 { margin: 0; font: 64px/1.05 var(--serif); }.archive-hero p { max-width: 620px; color: #bcccdc; }
.search-panel { max-width: 1180px; margin: -1px auto 0; padding: 30px; display: grid; grid-template-columns: 1.3fr .7fr .7fr; gap: 14px; background: var(--paper-2); border: 1px solid var(--line); box-shadow: var(--shadow); }
.field label { display: block; margin-bottom: 8px; color: #486581; font: 10px var(--mono); letter-spacing: .12em; }
.field input, .field select { width: 100%; height: 48px; padding: 0 14px; color: var(--ink); background: white; border: 1px solid var(--line); border-radius: 0; }
.archive-results { padding: 60px clamp(22px,5vw,72px) 100px; }
.result-bar { max-width: 1180px; margin: 0 auto 25px; display: flex; align-items: center; justify-content: space-between; gap: 16px; color: #526d82; }
.result-bar strong { color: var(--ink); }
.empty-state { grid-column: 1/-1; padding: 60px; text-align: center; border: 1px dashed #829ab1; }

.teacher-hero { position: relative; min-height: 590px; display: grid; grid-template-columns: 44% 56%; color: white; background: var(--ink); overflow: hidden; }
.teacher-portrait { position: relative; overflow: hidden; }
.teacher-portrait .portrait-crop { height: 100%; filter: saturate(.72) contrast(1.03); }
.teacher-portrait::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 60%, var(--ink)); }
.teacher-intro { position: relative; z-index: 2; display: flex; flex-direction: column; justify-content: center; padding: 70px clamp(32px,6vw,90px) 70px 20px; }
.teacher-intro h1 { margin: 0; font: 700 clamp(50px,7vw,90px)/1 var(--serif); letter-spacing: .08em; }
.teacher-intro h1 small { display: block; margin: 18px 0; color: var(--amber); font: 11px var(--mono); letter-spacing: .18em; }
.teacher-quote { max-width: 620px; margin: 22px 0; font: 22px/1.75 var(--serif); }
.identity-strip { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 24px; color: #bcccdc; font-size: 13px; }
.identity-strip span { padding-left: 12px; border-left: 2px solid var(--amber); }
.share-trigger { align-self: flex-start; margin-top: 27px; padding: 10px 16px; color: white; background: transparent; border: 1px solid rgba(255,255,255,.52); cursor: pointer; }
.share-trigger:hover { color: var(--ink); background: var(--amber); border-color: var(--amber); }
.detail-nav { position: sticky; top: 76px; z-index: 70; padding: 0 clamp(20px,5vw,72px); overflow-x: auto; background: rgba(247,249,250,.96); border-bottom: 1px solid var(--line); }
.detail-nav-inner { max-width: 1180px; margin: 0 auto; display: flex; min-width: max-content; }
.detail-nav a { padding: 16px 22px; color: #526d82; font-size: 13px; text-decoration: none; border-bottom: 2px solid transparent; }.detail-nav a:hover { color: var(--ink); border-color: var(--brick); }
.teacher-content { padding: 88px clamp(22px,5vw,72px); }
.content-section { max-width: 1180px; margin: 0 auto 100px; scroll-margin-top: 160px; }
.content-kicker { display: flex; gap: 14px; align-items: center; margin-bottom: 16px; color: var(--brick); font: 11px var(--mono); letter-spacing: .16em; }
.content-kicker::before { content: ""; width: 34px; height: 1px; background: currentColor; }
.content-section > h2 { margin: 0 0 35px; font: 44px var(--serif); }
.bio-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 75px; }
.bio-fact { padding: 24px; background: #dfe7eb; }.bio-fact dt { color: #627d98; font-size: 12px; }.bio-fact dd { margin: 0 0 18px; font: 20px var(--serif); }.bio-copy { font: 17px/2 var(--serif); }
.chronicle { position: relative; margin-left: 70px; border-left: 1px solid #829ab1; }
.chronicle-item { position: relative; display: grid; grid-template-columns: 115px 1fr; gap: 30px; padding: 0 0 48px 46px; transition: background .35s; cursor: pointer; }
.chronicle-item::before { content: ""; position: absolute; left: -7px; top: 7px; width: 12px; height: 12px; background: var(--paper); border: 2px solid var(--brick); transform: rotate(45deg); }
.chronicle-item time { color: var(--brick); font: 20px var(--mono); }.chronicle-item h3 { margin: 0 0 8px; font: 24px var(--serif); }.chronicle-item p { margin: 0; color: #526d82; }
.chronicle-item.highlight { background: rgba(194,138,51,.18); }
.achievement-grid { display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.achievement { min-height: 220px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper-2); }
.achievement b { color: var(--amber); font: 34px var(--mono); }.achievement h3 { margin: 40px 0 10px; font: 22px var(--serif); }.achievement p { color: #627d98; font-size: 13px; }
.oral-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 28px; }
.video-demo { position: relative; min-height: 430px; display: flex; flex-direction: column; justify-content: flex-end; overflow: hidden; color: white; background: #0b2233; }
.video-demo img { position: absolute; inset: 0; width: 300%; height: 100%; max-width: none; object-fit: cover; transform: translateX(0); filter: brightness(.52) saturate(.65); }
.video-demo::after { content: ""; position: absolute; inset: 0; background: linear-gradient(transparent 46%, rgba(5,20,31,.9)); }
.play-button { position: absolute; z-index: 3; inset: 50% auto auto 50%; width: 78px; height: 78px; color: white; background: rgba(123,50,64,.9); border: 1px solid rgba(255,255,255,.55); border-radius: 50%; transform: translate(-50%,-50%); cursor: pointer; }
.play-button:hover { background: var(--amber); }.play-button span { display: inline-block; margin-left: 4px; font-size: 24px; }
.video-info { position: relative; z-index: 2; padding: 28px; }.video-info h3 { margin: 0; font: 24px var(--serif); }.video-info p { margin: 7px 0 18px; color: #bcccdc; }
.progress { height: 3px; background: rgba(255,255,255,.3); }.progress i { display: block; width: 18%; height: 100%; background: var(--amber); transition: width .4s; }
.oral-side { display: grid; gap: 18px; }
.audio-card, .transcript-card { padding: 26px; background: var(--paper-2); border: 1px solid var(--line); }
.audio-card h3, .transcript-card h3 { margin: 0 0 12px; font: 21px var(--serif); }
.audio-controls { display: flex; gap: 12px; align-items: center; }.audio-toggle { flex: 0 0 42px; height: 42px; color: white; background: var(--ink); border: 0; border-radius: 50%; cursor: pointer; }
.wave { flex: 1; height: 36px; display: flex; align-items: center; gap: 3px; }.wave i { width: 3px; height: var(--h); background: #829ab1; animation: none; }.audio-card.playing .wave i { animation: pulse .8s ease-in-out infinite alternate; animation-delay: var(--d); background: var(--brick); }
@keyframes pulse { to { height: 90%; } }
.transcript-card p { color: #526d82; font: 14px/1.9 var(--serif); }.transcript-card mark { color: var(--ink); background: var(--amber-soft); }
.media-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; grid-template-rows: 240px 240px; gap: 14px; }
.media-item { position: relative; overflow: hidden; padding: 20px; color: white; background: var(--ink-2); }.media-item:first-child { grid-row: 1/3; background: var(--brick); }
.media-item:nth-child(3) { background: var(--teal); }.media-item:nth-child(4) { background: #3e5c70; }
.media-item::before { content: attr(data-year); position: absolute; right: 14px; bottom: -10px; color: rgba(255,255,255,.13); font: 70px var(--mono); }
.media-item b { position: relative; z-index: 1; font: 18px var(--serif); }.media-item small { position: absolute; z-index: 1; left: 20px; bottom: 18px; color: rgba(255,255,255,.75); }
.scan-lines { position: absolute; inset: 25% 12% 18%; border: 1px solid rgba(255,255,255,.26); transform: rotate(-3deg); }.scan-lines::before { content: "课堂备课手稿\A第七章　文学与时代\A——————\A讲授不只是传递答案"; white-space: pre; position: absolute; inset: 20px; color: rgba(255,255,255,.7); font: 13px/2 var(--serif); }

.about-page { padding: 90px clamp(22px,6vw,100px); background: var(--paper-2); }.about-wrap { max-width: 1050px; margin: 0 auto; }.about-page h1 { margin: 0 0 30px; font: 60px var(--serif); }.about-lead { max-width: 780px; font: 22px/1.8 var(--serif); }.principles { margin-top: 60px; display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--line); }.principle { padding: 32px; border-right: 1px solid var(--line); }.principle:last-child { border: 0; }.principle h2 { font: 24px var(--serif); }.principle p { color: #627d98; }

.admin-page { min-height: 820px; display: grid; grid-template-columns: 230px 1fr; background: #e8edf0; }
.admin-sidebar { padding: 24px 18px; color: white; background: var(--ink); }
.admin-brand { display: flex; gap: 10px; align-items: center; margin-bottom: 35px; font: 18px var(--serif); }.admin-brand span { display:grid; place-items:center; width:34px;height:34px;background:var(--brick); }
.admin-sidebar h3 { margin: 24px 10px 8px; color: #829ab1; font: 9px var(--mono); letter-spacing:.15em; }.admin-sidebar a { display:block; padding: 10px 12px; color:#bcccdc; font-size:13px; text-decoration:none; }.admin-sidebar a.active, .admin-sidebar a:hover { color:white;background:rgba(255,255,255,.08); }
.admin-main { min-width: 0; }
.admin-topbar { min-height: 64px; padding: 10px 28px; display: flex; align-items:center; justify-content:space-between; gap:20px; background:white; border-bottom:1px solid var(--line); }.admin-topbar strong { font:20px var(--serif); }.admin-user { font-size:12px;color:#526d82; }
.admin-content { padding: 28px; }.admin-content h1 { margin:0;font:30px var(--serif); }.admin-content > p { margin-top:4px;color:#627d98;font-size:13px; }
.stat-grid { margin:25px 0; display:grid;grid-template-columns:repeat(4,1fr);gap:14px; }.stat { padding:20px;background:white;border-top:3px solid var(--blue); }.stat:nth-child(2){border-color:var(--amber)}.stat:nth-child(3){border-color:var(--brick)}.stat:nth-child(4){border-color:var(--teal)}.stat b{display:block;font:32px var(--mono)}.stat span{color:#627d98;font-size:12px}
.admin-grid { display:grid;grid-template-columns:1.35fr .65fr;gap:18px; }.panel { min-width:0;padding:22px;background:white;border:1px solid var(--line); }.panel-head { display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:18px; }.panel-head h2{margin:0;font:21px var(--serif)}.panel-head button{color:var(--brick);background:none;border:0;cursor:pointer}
.admin-table{width:100%;border-collapse:collapse;font-size:12px}.admin-table th{text-align:left;color:#627d98;font-weight:500;padding:10px;border-bottom:1px solid var(--line)}.admin-table td{padding:13px 10px;border-bottom:1px solid var(--line)}.status{display:inline-block;padding:3px 8px;font-size:10px;background:#dfe7eb}.status.review{color:#7b4b00;background:#f6e8c9}.status.published{color:#155b3f;background:#d9eee5}.status.draft{color:#526d82}.mini-btn{padding:5px 8px;color:var(--ink);background:white;border:1px solid var(--line);cursor:pointer}.mini-btn:hover{border-color:var(--brick);color:var(--brick)}
.workflow{display:grid;gap:0}.flow-step{position:relative;padding:13px 10px 13px 42px;border-left:1px solid #9fb3c4;margin-left:10px}.flow-step::before{content:"";position:absolute;left:-6px;top:18px;width:10px;height:10px;background:white;border:2px solid var(--blue);border-radius:50%}.flow-step.done::before{background:var(--teal);border-color:var(--teal)}.flow-step.current::before{background:var(--amber);border-color:var(--amber);box-shadow:0 0 0 5px #f6e8c9}.flow-step b{display:block;font-size:13px}.flow-step small{color:#627d98}.media-queue{margin-top:18px}.queue-item{display:grid;grid-template-columns:38px 1fr auto;gap:10px;align-items:center;padding:12px 0;border-top:1px solid var(--line)}.file-icon{display:grid;place-items:center;width:38px;height:38px;color:white;background:var(--brick);font:10px var(--mono)}.queue-item b{display:block;font-size:12px}.queue-item small{color:#627d98}.queue-item em{font:normal 10px var(--mono);color:var(--teal)}
.notice{margin-top:18px;padding:15px 18px;color:#5a420f;background:#f6e8c9;border-left:4px solid var(--amber);font-size:12px}.back-to-site{display:inline-flex;margin-top:28px;color:white;text-decoration:none;border-bottom:1px solid #829ab1}
.modal{position:fixed;z-index:200;inset:0;display:none;place-items:center;padding:20px;background:rgba(5,20,31,.65)}.modal.open{display:grid}.modal-card{width:min(540px,100%);padding:30px;background:white;box-shadow:var(--shadow)}.modal-card h2{font:26px var(--serif)}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:25px}.modal-actions button{padding:9px 16px;border:1px solid var(--ink);cursor:pointer}.modal-actions .approve{color:white;background:var(--ink)}
.share-card { width: min(650px,100%); }.share-layout { display:grid;grid-template-columns:180px 1fr;gap:30px;align-items:center; }.share-layout small { display:block;margin-top:10px;color:#627d98;font-size:10px;text-align:center; }.share-qr { width:180px;aspect-ratio:1;display:grid;grid-template-columns:repeat(21,1fr);padding:11px;background:white;border:1px solid var(--line); }.share-qr i.dark { background:var(--ink); }.share-copy p { color:#526d82; }.share-copy input { width:100%;height:44px;padding:0 10px;border:1px solid var(--line);background:var(--paper-2); }.share-copy button { margin-top:12px;padding:9px 16px;color:white;background:var(--ink);border:1px solid var(--ink);cursor:pointer; }
.toast { position: fixed; z-index: 300; right: 24px; bottom: 24px; max-width: 360px; padding: 14px 18px; color: white; background: var(--teal); box-shadow: var(--shadow); transform: translateY(100px); opacity: 0; transition: .3s; pointer-events: none; }.toast.show { transform: none; opacity: 1; }
.site-footer { padding: 55px clamp(22px,5vw,72px) 28px; display: grid; grid-template-columns: 1fr auto; gap: 35px; color: #bcccdc; background: #091f30; }.footer-mark{color:white;font:25px var(--serif)}.site-footer p{margin:8px 0}.footer-links{display:flex;gap:24px}.footer-links a{text-decoration:none}.site-footer small{grid-column:1/-1;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font:10px var(--mono)}

@media (max-width: 1050px) {
  .site-header { grid-template-columns: 1fr auto; }.main-nav { order:3; grid-column:1/-1; justify-content:center; }.admin-entry{grid-column:2;grid-row:1}.hero{grid-template-columns:1fr}.hero-copy{min-height:560px}.hero-visual{min-height:580px}.method-wrap{grid-template-columns:1fr}.method-copy{position:static}.teacher-hero{grid-template-columns:48% 52%}.admin-grid{grid-template-columns:1fr}.stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 760px) {
  .demo-ribbon{padding-inline:12px;font-size:9px}.site-header{min-height:64px;padding:9px 16px;display:flex;justify-content:space-between}.brand-seal{width:36px;height:36px}.brand strong{font-size:15px}.brand small{display:none}.admin-entry{display:none}.mobile-menu{display:inline-grid;place-items:center;width:42px;height:42px;padding:9px;background:transparent;border:1px solid var(--line);cursor:pointer}.mobile-menu span{display:block;width:20px;height:1px;margin:2px;background:var(--ink)}.mobile-menu b{position:absolute;width:1px;height:1px;overflow:hidden}.main-nav{position:absolute;top:64px;left:0;right:0;display:none;align-items:stretch;gap:0;padding:12px 18px 18px;background:var(--paper-2);border-bottom:1px solid var(--line);box-shadow:var(--shadow)}.main-nav.open{display:grid}.main-nav a{padding:13px 4px;border-bottom:1px solid var(--line)}.main-nav .mobile-admin-link{display:block;color:var(--brick);font-weight:700}
  .section-heading{grid-template-columns:1fr}.hero{min-height:auto}.hero-copy{min-height:520px;padding:70px 24px}.hero-copy h1{font-size:58px}.hero-lead{font-size:15px}.hero-visual{min-height:540px}.hero-index a{min-height:70px;padding:12px 8px}.hero-index strong{font-size:14px}.hero-index small{font-size:7px}.catalog-number{display:none}.timeline-ruler{padding-inline:24px}.timeline-ruler ol{grid-template-columns:repeat(4,1fr)}.timeline-ruler li:nth-child(even){display:none}
  .featured,.collection,.method{padding:70px 18px}.teacher-grid{grid-template-columns:1fr;gap:34px}.collection-grid{grid-template-columns:1fr}.feature-file{grid-template-columns:1fr;min-height:520px}.feature-file-visual{min-height:260px}.feature-file-copy{padding:28px}.method-item{grid-template-columns:64px 1fr}.archive-hero{padding:60px 20px 45px}.archive-hero h1{font-size:48px}.search-panel{margin:0;padding:20px;grid-template-columns:1fr}.archive-results{padding:45px 18px 70px}
  .teacher-hero{grid-template-columns:1fr;min-height:auto}.teacher-portrait{height:430px}.teacher-portrait::after{background:linear-gradient(transparent 60%,var(--ink))}.teacher-intro{padding:40px 24px 55px}.teacher-intro h1{font-size:58px}.detail-nav{top:64px;padding:0}.detail-nav a{padding:14px 16px}.teacher-content{padding:60px 18px}.content-section{margin-bottom:75px}.content-section>h2{font-size:36px}.bio-layout{grid-template-columns:1fr;gap:28px}.chronicle{margin-left:9px}.chronicle-item{grid-template-columns:1fr;padding-left:30px;gap:4px}.achievement-grid{grid-template-columns:1fr}.oral-grid{grid-template-columns:1fr}.video-demo{min-height:360px}.media-grid{grid-template-columns:1fr 1fr;grid-template-rows:250px 180px 180px}.media-item:first-child{grid-column:1/-1;grid-row:auto}.share-layout{grid-template-columns:1fr}.share-qr{margin:auto}.about-page{padding:60px 20px}.about-page h1{font-size:45px}.principles{grid-template-columns:1fr}.principle{border-right:0;border-bottom:1px solid var(--line)}
  .admin-page{grid-template-columns:1fr}.admin-sidebar{display:none}.admin-content{padding:18px}.admin-topbar{padding:10px 18px}.stat-grid{grid-template-columns:1fr 1fr}.stat{padding:14px}.stat b{font-size:25px}.panel{padding:15px;overflow-x:auto}.admin-table{min-width:620px}.site-footer{grid-template-columns:1fr}.footer-links{flex-wrap:wrap}.site-footer small{grid-column:auto}.footer-links{font-size:13px}
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}