/* 关于页专属样式 · v2「坐标纸工作台」
   从 homepage/index.html 同步抽取：章节/证书/家长信/理念/窄屏。
   配色与 blog.css 共用同一组变量，一字不改。 */

picture { display: contents; }

.nowrap { white-space: nowrap; }

/* ---------- 签名元素：角标记括号 ---------- */

.bracket { position: relative; }
.bracket::before,
.bracket::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  pointer-events: none;
  border: 0 solid var(--accent);
  opacity: .5;
  transition: width .25s, height .25s, opacity .25s;
}
.bracket::before { top: -1px; left: -1px; border-top-width: 1.5px; border-left-width: 1.5px; }
.bracket::after { bottom: -1px; right: -1px; border-bottom-width: 1.5px; border-right-width: 1.5px; }
.bracket:hover::before, .bracket:hover::after { width: 24px; height: 24px; opacity: 1; }

/* ---------- 通用章节 ---------- */

.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(64px, 8vw, 108px) var(--pad) 0;
  scroll-margin-top: 24px;
}

.sec-head {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ink);
}
/* 签名元素：描边等宽编号 —— 工程图纸的图号 */
.sec-no {
  color: var(--paper);
  -webkit-text-stroke: 1.3px var(--accent);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: clamp(26px, 3.2vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
}
.sec-no::after {
  content: ".";
  color: var(--accent);
  -webkit-text-stroke: 0;
}
.sec-head h2 {
  font-family: var(--serif);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: .015em;
}
.sec-en {
  color: var(--muted);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 9.5px;
  letter-spacing: .24em;
  white-space: nowrap;
}
.sec-tools {
  display: flex;
  align-items: center;
  gap: 18px;
}
.auto-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 0 2px;
  border: 0;
  border-bottom: 1px solid transparent;
  background: none;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: .08em;
  line-height: 1.5;
  white-space: nowrap;
  cursor: pointer;
  transition: color .2s, border-color .2s;
}
.auto-toggle:hover { color: var(--accent); border-bottom-color: var(--accent); }
.auto-toggle::after {
  content: "";
  position: absolute;
  inset: -6px -8px;
}
.auto-toggle-mark {
  display: grid;
  place-items: center;
  width: 17px;
  height: 17px;
  border: 1px solid currentColor;
  font-size: 8px;
  line-height: 1;
}

/* ---------- 关于：头像气泡 + 信息卡片 ---------- */

/* 标题栏已去掉，收窄版块顶部留白 */
#about { padding-top: clamp(20px, 3vw, 36px); }

.me-stage {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
  padding: 12px 0 30px;
  display: grid;
  place-items: center;
}
.me-avatar {
  position: relative;
  z-index: 1;
  width: 150px;
  height: 150px;
  display: block;
  overflow: hidden;
  border-radius: 50%;
  border: 4px solid var(--paper-3);
  outline: 1px solid var(--rule-strong);
  box-shadow: 0 12px 28px rgba(13, 130, 105, .18);
  animation: me-bob 5.2s ease-in-out infinite alternate;
}
.me-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.me-bubble {
  position: absolute;
  z-index: 2;
  padding: 7px 14px;
  background: var(--paper-3);
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  color: var(--ink);
  font-size: 12.5px;
  letter-spacing: .04em;
  line-height: 1.6;
  white-space: nowrap;
  box-shadow: 3px 4px 0 rgba(14, 54, 48, .06);
  animation: me-bob 4.6s ease-in-out infinite alternate;
}
.me-bubble.b1 { top: 6%;  left: 3%;   animation-delay: -.4s; }
.me-bubble.b2 { top: 2%;  right: 9%;  animation-delay: -1.2s; animation-duration: 5.4s; }
.me-bubble.b3 { top: 40%; left: -1%;  animation-delay: -2s; }
.me-bubble.b4 { top: 33%; right: -1%; animation-delay: -.8s; animation-duration: 5s; }
.me-bubble.b5 { top: 66%; right: 5%;  animation-delay: -1.6s; }
.me-bubble.b6 { bottom: 2%; left: 6%; animation-delay: -2.4s; animation-duration: 5.8s; }
.me-bubble.b7 { bottom: 0;  right: 21%; animation-delay: -.2s; }
.me-bubble.b8 { bottom: 30%; left: 19%; animation-delay: -3s; }

@keyframes me-bob {
  from { transform: translateY(3px); }
  to   { transform: translateY(-4px); }
}

.me-ping {
  transform-origin: center;
  transform-box: fill-box;
  animation: me-ping 2.6s ease-out infinite;
}
@keyframes me-ping {
  0%   { transform: scale(.45); opacity: .55; }
  70%, 100% { transform: scale(1.5); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .me-avatar, .me-bubble, .me-ping { animation: none; }
}

.me-cards {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}
.me-card {
  padding: 26px 28px 28px;
  background: rgba(255, 255, 255, .62);
  -webkit-backdrop-filter: blur(10px) saturate(1.15);
  backdrop-filter: blur(10px) saturate(1.15);
  border: 1px solid rgba(255, 255, 255, .8);
  border-radius: 16px;
  box-shadow: 0 10px 24px rgba(13, 130, 105, .07);
  transition: transform .3s var(--ease-out), box-shadow .3s var(--ease-out);
}
.me-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(13, 130, 105, .12);
}

.me-card-id      { grid-column: span 7; }
.me-card-pursuit { grid-column: span 5; }
.me-card-stats   { grid-column: span 5; }
.me-card-map     { grid-column: span 7; }
.me-card-base {
  grid-column: span 12;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 22px 28px 24px;
  text-align: center;
}

.me-hello {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .14em;
}
.me-name {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: clamp(23px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1.4;
}
.me-name b { color: var(--accent-deep); }
.me-line {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.9;
}

.me-label {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .2em;
}
.me-card-title {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.4;
}

.me-pursuit {
  margin-top: 14px;
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 33px);
  font-weight: 600;
  line-height: 1.55;
}
.me-pursuit b { font-weight: 800; letter-spacing: .02em; }
.me-pursuit em { font-style: normal; color: var(--danger); }

.me-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 18px;
  margin-top: 18px;
}
.me-stat dt {
  color: var(--muted);
  font-size: 10.5px;
  letter-spacing: .14em;
}
.me-stat dd {
  margin-top: 3px;
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 700;
  line-height: 1.3;
}

.me-map { margin-top: 12px; }
.me-map svg {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 10px;
}
.me-loc {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 13px;
  letter-spacing: .06em;
}

.me-fact dt {
  color: var(--muted);
  font-size: 10.5px;
  letter-spacing: .18em;
}
.me-fact dd {
  margin-top: 5px;
  font-family: var(--serif);
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.5;
}

/* ---------- 课程 ---------- */

.course-lead,
.results-lead {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: clamp(32px, 6vw, 86px);
  padding-top: 30px;
}
.course-lead .note,
.results-lead .note {
  color: var(--muted);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 10px;
  letter-spacing: .14em;
  line-height: 1.9;
}
.course-lead .note b,
.results-lead .note b {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
}
.course-lead p,
.results-lead p {
  max-width: 31em;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 500;
  line-height: 1.75;
}

.course-list {
  margin-top: 38px;
  border-top: 2px solid var(--ink);
}

.course {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, .95fr) minmax(0, 1.4fr) 56px;
  grid-template-areas: "idx title desc icon";
  gap: clamp(18px, 3vw, 38px);
  align-items: start;
  padding: 27px 0 29px;
  border-bottom: 1px solid var(--rule);
}
.course::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .3s ease;
}
.course:hover::before { transform: scaleY(1); }

.course .idx {
  grid-area: idx;
  padding-top: 4px;
  color: var(--accent-deep);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 12px;
  letter-spacing: .12em;
}
.course .idx::after { content: "."; }
.course h3 {
  grid-area: title;
  font-family: var(--serif);
  font-size: clamp(19px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.5;
  transition: color .2s;
}
.course:hover h3 { color: var(--accent-deep); }
.course .meta {
  margin-top: 5px;
  color: var(--muted);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 10px;
  letter-spacing: .12em;
  line-height: 1.7;
}
.course .desc {
  grid-area: desc;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.95;
  text-wrap: pretty;
}
.course .course-icon {
  grid-area: icon;
  justify-self: end;
  width: 48px;
  height: 48px;
  padding: 6px;
  object-fit: contain;
  background: var(--paper-3);
  border: 1px solid var(--rule);
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.course:hover .course-icon {
  transform: rotate(-4deg);
  border-color: var(--rule-strong);
  box-shadow: 2px 2px 0 rgba(14, 54, 48, .1);
}

.course-foot {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 18px;
  color: var(--muted);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 10px;
  letter-spacing: .1em;
}
.course-foot span:last-child { text-align: right; }

/* ---------- 学生成果 ---------- */

.cert-group { margin-top: 38px; }
.cert-group + .cert-group { margin-top: clamp(42px, 5vw, 58px); }

.cert-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 9px;
  border-bottom: 2px solid var(--ink);
}
.cert-group-head h3 {
  font-family: var(--serif);
  font-size: clamp(19px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.4;
}
.cert-group-head h3::before {
  content: "▸ ";
  color: var(--accent);
}
.cert-group-head .cert-count {
  margin-left: auto;
  color: var(--muted);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 9.5px;
  letter-spacing: .16em;
  white-space: nowrap;
}
.cert-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 14px;
  align-self: center;
}
.cert-arrow {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--rule-strong);
  background: var(--paper-3);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, opacity .2s;
}
.cert-arrow:hover:not(:disabled) { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.cert-arrow:disabled { opacity: .28; cursor: default; }

.cert-track {
  display: flex;
  gap: clamp(14px, 2vw, 24px);
  margin-top: 22px;
  padding: 4px 2px 22px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
}
.cert-track::-webkit-scrollbar { display: none; }
.cert-track:focus-visible { outline-offset: 4px; }

.cert-track .cert {
  flex: 0 0 auto;
}
.cert-track.is-landscape .cert { flex-basis: clamp(230px, 26vw, 300px); }
.cert-track.is-portrait .cert { flex-basis: clamp(140px, 18vw, 200px); }

.cert {
  display: flex;
  flex-direction: column;
  background: var(--paper-3);
  border: 1px solid var(--rule);
  transition: transform .3s ease, border-color .3s, box-shadow .3s;
}
.cert:hover {
  transform: translateY(-3px);
  border-color: var(--rule-strong);
  box-shadow: 6px 8px 0 rgba(14, 54, 48, .05);
}

.cert-open {
  display: block;
  width: 100%;
  padding: 7px 7px 0;
  border: 0;
  background: none;
  cursor: zoom-in;
}
.cert-open:focus-visible { outline-offset: -3px; }

.cert-mat {
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--rule);
}
.cert-track.is-landscape .cert-mat { aspect-ratio: 4 / 3; }
.cert-track.is-portrait .cert-mat { aspect-ratio: 3 / 4; }
.cert-mat img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.cert figcaption { padding: 11px 10px 13px; }
.cert-tag {
  display: block;
  color: var(--accent-deep);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 9px;
  letter-spacing: .15em;
  line-height: 1.5;
}
.cert-title {
  display: block;
  margin-top: 4px;
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
}
.cert-meta {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: .05em;
  line-height: 1.7;
}

.cert-note {
  margin-top: 24px;
  padding-left: 13px;
  border-left: 2px solid var(--accent);
  color: var(--muted);
  font-size: 10.5px;
  letter-spacing: .04em;
  line-height: 1.9;
}

/* 证书大图 */

.cert-viewer {
  width: min(94vw, 900px);
  max-width: 900px;
  max-height: 94vh;
  margin: auto;
  padding: 0;
  border: 1px solid var(--rule-strong);
  background: var(--paper-3);
  color: var(--ink);
  box-shadow: 0 32px 90px rgba(0, 0, 0, .5);
}
.cert-viewer::backdrop { background: rgba(14, 54, 48, .86); }
.cert-viewer[open] { display: flex; flex-direction: column; }

.cert-viewer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule);
}
.cert-viewer-pager {
  display: flex;
  align-items: center;
  gap: 8px;
}
.cert-viewer-bar button {
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  cursor: pointer;
  font-family: var(--sans);
  transition: background .2s, color .2s;
}
.cert-viewer-bar button:hover { background: var(--ink); color: var(--paper); }
.cert-viewer-step { width: 30px; height: 30px; font-size: 14px; line-height: 1; }
.cert-viewer-count {
  color: var(--muted);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 9.5px;
  letter-spacing: .16em;
}
.cert-viewer-close {
  height: 30px;
  padding: 0 12px;
  font-size: 10.5px;
  letter-spacing: .1em;
}

.cert-viewer-body {
  display: grid;
  place-items: center;
  min-height: 0;
  padding: 18px;
  overflow: auto;
}
.cert-viewer-body img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 68vh;
  background: #fff;
  border: 1px solid var(--rule);
}
.cert-viewer-body figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .05em;
  line-height: 1.7;
  text-align: center;
}
body.cert-open { overflow: hidden; }

@media (max-width: 700px) {
  .cert-group-head { gap: 10px; }
  .cert-group-head .cert-count { display: none; }
  .cert-nav { margin-left: auto; }
  .cert-track { gap: 12px; padding-bottom: 18px; }
  .cert-track.is-landscape .cert { flex-basis: 78vw; }
  .cert-track.is-portrait .cert { flex-basis: 41vw; }
  .cert-open { padding: 5px 5px 0; }
  .cert figcaption { padding: 9px 8px 11px; }
  .cert-tag { font-size: 8.5px; letter-spacing: .12em; }
  .cert-title { font-size: 13px; }
  .cert-meta { font-size: 9.5px; }
  .cert-viewer-body { padding: 12px; }
  .cert-viewer-body img { max-height: 64vh; }
  .cert-viewer-close { padding: 0 9px; font-size: 9.5px; }
}

/* ---------- 家长信 ---------- */

.letters {
  margin-top: clamp(64px, 8vw, 108px);
  background: none;
  border: 0;
  scroll-margin-top: 24px;
}
.letters-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(52px, 6.5vw, 84px) var(--pad);
}
.letters .sec-head { border-bottom-color: var(--rule-strong); }

.letters-grid {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
  gap: clamp(36px, 6vw, 80px);
  padding-top: 34px;
  align-items: start;
}

.letters-copy h3 {
  max-width: 10em;
  font-family: var(--serif);
  font-size: clamp(25px, 3.1vw, 36px);
  font-weight: 700;
  line-height: 1.55;
  text-wrap: balance;
}
.letters-copy > p {
  max-width: 30em;
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 2;
  text-wrap: pretty;
}
.letters-copy > p strong { color: var(--ink); font-weight: 600; }
.fineprint {
  margin-top: 18px;
  padding-left: 13px;
  border-left: 2px solid var(--accent);
  color: var(--muted);
  font-size: 10.5px;
  letter-spacing: .04em;
  line-height: 1.9;
}
.letters-quote {
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--rule-strong);
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.8;
}
.letters-quote b { color: var(--accent-deep); font-weight: 700; }

.letter-sheet {
  position: relative;
  padding: clamp(24px, 3.2vw, 38px);
  background: var(--paper-3);
  border: 1px solid var(--rule-strong);
  box-shadow: 9px 9px 0 rgba(14, 54, 48, .055);
}
/* 签名元素：家长信四角括号 */
.letter-sheet::before,
.letter-sheet::after {
  content: "";
  position: absolute;
  width: 16px; height: 16px;
  pointer-events: none;
  border: 0 solid var(--accent);
}
.letter-sheet::before { top: 5px; left: 5px; border-top-width: 2px; border-left-width: 2px; }
.letter-sheet::after { bottom: 5px; right: 5px; border-bottom-width: 2px; border-right-width: 2px; }

.stamp {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 66px;
  height: 66px;
  display: grid;
  place-content: center;
  border: 2px solid var(--accent);
  outline: 1px solid var(--accent);
  outline-offset: 3px;
  border-radius: 50%;
  color: var(--accent);
  font-family: var(--serif);
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
  transform: rotate(8deg);
  opacity: .9;
}

.letter-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 0 94px 13px 0;
  border-bottom: 1px solid var(--rule);
  color: var(--muted);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 10px;
  letter-spacing: .08em;
  line-height: 1.7;
}
.letter-head b {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
}

.letter-to {
  margin-top: 20px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
}
.letter-to .blank {
  display: inline-block;
  min-width: 92px;
  margin: 0 4px;
  border-bottom: 1px solid var(--rule-strong);
}

.letter-steps {
  list-style: none;
  margin-top: 8px;
}
.letter-steps li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--rule);
}
.letter-steps .no {
  padding-top: 1px;
  color: var(--accent-deep);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 11px;
  letter-spacing: .08em;
}
.letter-steps .no::after { content: "."; }
.letter-steps b {
  display: block;
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.6;
}
.letter-steps p {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.85;
  text-wrap: pretty;
}
.letter-foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
  color: var(--muted);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 10px;
  letter-spacing: .08em;
}
.letter-foot .sign {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: .04em;
}

/* ---------- 理念 ---------- */

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 34px;
  border-top: 2px solid var(--ink);
}
.principle {
  padding: 24px 28px 28px;
  border-left: 1px solid var(--rule);
}
.principle:first-child { padding-left: 0; border-left: 0; }
.principle .no {
  color: var(--paper);
  -webkit-text-stroke: 1px var(--accent);
  font-family: Consolas, "JetBrains Mono", Menlo, monospace;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .1em;
}
.principle .no::after {
  content: ".";
  color: var(--accent);
  -webkit-text-stroke: 0;
}
.principle h3 {
  margin-top: 13px;
  font-family: var(--serif);
  font-size: clamp(19px, 1.9vw, 22px);
  font-weight: 700;
  line-height: 1.5;
}
.principle p {
  margin-top: 9px;
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.95;
  text-wrap: pretty;
}

.manifesto {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 18px;
  margin-top: clamp(44px, 5.5vw, 70px);
  padding: clamp(30px, 4.4vw, 46px) 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.manifesto .qmark {
  color: var(--accent);
  font-family: var(--serif);
  font-size: 70px;
  line-height: .8;
}
.manifesto p {
  max-width: 25em;
  font-family: var(--serif);
  font-size: clamp(23px, 3.3vw, 37px);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: .01em;
  text-wrap: balance;
}
.manifesto em { font-style: normal; color: var(--accent); }


/* ---------- 窄屏 ---------- */

@media (max-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(260px, .72fr);
    gap: 36px;
  }
  .course-lead,
  .results-lead { grid-template-columns: 190px minmax(0, 1fr); gap: 36px; }
  .letters-grid { grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 38px; }
}

@media (max-width: 820px) {

  .hero { grid-template-columns: 1fr; padding-top: 38px; }
  .portrait {
    max-width: 440px;
    justify-self: start;
    margin-top: 4px;
  }
  .portrait-frame img { width: 100%; aspect-ratio: 1 / 1; object-position: 50% 50%; }
  .spine { display: none; }

  .facts-grid { grid-template-columns: 1fr 1fr; }
  .fact:nth-child(odd) { border-left: 0; padding-left: 0; }
  .fact:nth-child(n+3) { border-top: 1px solid var(--rule); }

  .sec-head { grid-template-columns: 56px minmax(0, 1fr) auto; }
  .sec-en { display: none; }
  .sec-no { font-size: 22px; -webkit-text-stroke-width: 1px; }

  .course-lead,
  .results-lead { grid-template-columns: 1fr; gap: 18px; }
  .course-lead .note,
  .results-lead .note { display: flex; align-items: baseline; gap: 10px; }
  .course-lead .note b,
  .results-lead .note b { display: inline; }

  .course {
    grid-template-columns: 34px minmax(0, 1fr) 44px;
    grid-template-areas:
      "idx title icon"
      "idx desc icon";
    row-gap: 6px;
    column-gap: 14px;
    padding: 22px 0 24px;
  }
  .course .course-icon { width: 42px; height: 42px; padding: 5px; align-self: center; }
  .course::before { left: -10px; }
  .course-foot { flex-direction: column; gap: 4px; }
  .course-foot span:last-child { text-align: left; }

  .letters-grid { grid-template-columns: 1fr; gap: 30px; }

  /* 气泡从头像四周收拢为头像下方的标签行 */
  .me-stage { display: flex; flex-direction: column; align-items: center; padding: 22px 0 6px; }
  .me-avatar { order: -1; }
  .me-bubbles {
    position: static;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 18px;
    max-width: 420px;
  }
  .me-bubble { position: static; animation: none; padding: 5px 12px; font-size: 11.5px; }

  .me-card-id,
  .me-card-pursuit,
  .me-card-stats,
  .me-card-map { grid-column: span 12; }
  .me-card { padding: 22px 22px 24px; }
  .me-card-base { grid-template-columns: 1fr; gap: 14px; padding: 20px 22px; }
  .letters-copy h3 { max-width: 14em; }
  .letter-sheet { max-width: 620px; }

  .principles { grid-template-columns: 1fr; }
  .principle {
    padding: 20px 0 22px;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }
  .principle:first-child { border-top: 0; padding-top: 22px; }

  .closing-grid { grid-template-columns: 1fr; gap: 34px; align-items: start; }
  .closing-side { max-width: 36em; }
}

@media (max-width: 560px) {
  :root { --pad: 18px; }
  body { font-size: 15px; }

  .hero { padding-top: 32px; gap: 30px; }
  h1 { font-size: clamp(52px, 15vw, 72px); }
  .hero-lede { font-size: 21px; }
  .hero-intro { font-size: 14.5px; }
  .hero-actions { gap: 22px; margin-top: 26px; }

  .portrait { max-width: 320px; }
  .portrait figcaption { font-size: 9.5px; }
  .portrait-frame img { aspect-ratio: 1 / 1; object-position: 50% 50%; }

  .fact { padding: 14px 12px 16px; }
  .fact dd { font-size: 15.5px; }
  .fact dt { font-size: 9.5px; letter-spacing: .12em; }

  .sec-head { grid-template-columns: 46px minmax(0, 1fr) auto; gap: 10px; }
  .sec-no { font-size: 19px; }
  .sec-head h2 { font-size: 27px; }

  .me-cards { gap: 12px; }
  .me-card { border-radius: 14px; }
  .me-stats { gap: 12px 14px; }
  .me-stat dd { font-size: 24px; }

  .manifesto {
    position: relative;
    grid-template-columns: 1fr;
    gap: 0;
    padding-left: 14px;
  }
  .manifesto .qmark {
    position: absolute;
    left: -10px;
    top: 2px;
    font-size: 32px;
    line-height: 1;
  }
  .manifesto p { font-size: clamp(19px, 5.2vw, 23px); }

  .letter-sheet { padding: 24px 20px; box-shadow: 6px 6px 0 rgba(14, 54, 48, .055); }
  .stamp { width: 56px; height: 56px; top: 14px; right: 14px; font-size: 11px; }
  .letter-head { padding-right: 78px; }
  .letter-head span:last-child { display: none; }

  .closing h2 { font-size: clamp(27px, 8vw, 31px); }
  .closing-meta { flex-direction: column; align-items: flex-start; gap: 6px; }
}

@media print {
  body::after { display: none; }
  .hero-actions, .closing-links, .cert-nav, .auto-toggle { display: none; }
  .cert-viewer { display: none !important; }
  .closing { background: #fff; color: var(--ink); }
  .closing h2 em { color: var(--accent); }
  .closing-label, .closing-side p, .closing-meta { color: var(--ink-soft); }
  .closing-side, .closing-meta { border-top-color: var(--rule); }
  .end-seal { border-color: var(--accent); color: var(--accent-deep); }
}