@font-face {
  font-family: "MLModern Web";
  src: url("../fonts/mlmr10.otf") format("opentype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "MLModern Web";
  src: url("../fonts/mlmri10.otf") format("opentype");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "MLModern Web";
  src: url("../fonts/mlmbx10.otf") format("opentype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "MLModern Web";
  src: url("../fonts/mlmbxi10.otf") format("opentype");
  font-style: italic;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "Fandol Song Web";
  src: url("../fonts/FandolSong-Regular.otf") format("opentype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Fandol Hei Web";
  src: url("../fonts/FandolHei-Regular.otf") format("opentype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "Fandol Kai Web";
  src: url("../fonts/FandolKai-Regular.otf") format("opentype");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}

:root {
  --md-text-font: "MLModern Web", "Fandol Song Web", serif;
}

body,
.md-typeset {
  font-family: "MLModern Web", "Fandol Song Web", "Noto Serif CJK SC", serif;
}

.md-typeset strong,
.md-typeset b {
  font-family: "MLModern Web", "Fandol Hei Web", "Fandol Song Web", serif;
}

.md-typeset em,
.md-typeset i {
  font-family: "MLModern Web", "Fandol Kai Web", "Fandol Song Web", serif;
}

.MathJax,
.MathJax_Display {
  font-size: 1.05em;
}

/* TeX 导言区 choices 命令的 Markdown 对应布局。 */
.md-typeset .choices > ul {
  display: grid;
  gap: 0.35rem 1.25rem;
  margin: 0.5rem 0;
  padding-left: 1.6rem;
}

.md-typeset .choices--4 > ul {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.md-typeset .choices--2 > ul {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.md-typeset .choices--1 > ul {
  grid-template-columns: minmax(0, 1fr);
}

@media screen and (max-width: 50em) {
  .md-typeset .choices--4 > ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (max-width: 30em) {
  .md-typeset .choices > ul,
  .md-typeset .choices--4 > ul,
  .md-typeset .choices--2 > ul {
    grid-template-columns: minmax(0, 1fr);
  }
}
.md-typeset .paragraph-gap {
  display: inline-block;
  width: 1.5em;
}

/* TeX 下划线的网页可读性调整：避免文字下沿与装饰线重叠。 */
.md-typeset .lecture-underline {
  text-decoration-line: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
  text-decoration-skip-ink: auto;
}

/* TeX hrule 的统一网页替代样式。 */
.md-typeset hr.lecture-divider {
  margin: 1.5em 0;
  border: 0;
  border-top: 0.12rem solid var(--md-default-fg-color--lightest);
}

/* TeX 图片：优先使用源 includegraphics 的相对宽度，窄屏不溢出。 */
.md-typeset .lecture-image {
  display: block;
  width: fit-content;
  max-width: 100%;
  margin: 1.1rem auto;
  text-align: center;
}

.md-typeset .lecture-image[style] {
  width: min(var(--lecture-image-width), 100%);
}

.md-typeset .lecture-image img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.md-typeset .lecture-image:not([style]) img {
  width: auto;
}

.md-typeset .lecture-image img.lecture-image-dark {
  display: none;
}

[data-md-color-scheme="slate"] .md-typeset .lecture-image img.lecture-image-light {
  display: none;
}

[data-md-color-scheme="slate"] .md-typeset .lecture-image img.lecture-image-dark {
  display: block;
}

/* 转换后的 TeX 表格：单元格居中，窄屏允许横向滚动。 */
.md-typeset .lecture-table-wrap {
  max-width: 100%;
  margin: 1.2rem 0;
  overflow-x: auto;
}

.md-typeset table {
  display: table;
  width: max-content;
  max-width: 100%;
  margin: 0 auto;
  border-collapse: collapse;
}

.md-typeset table th,
.md-typeset table td {
  min-width: 4em;
  padding: 0.55rem 0.9rem;
  text-align: center;
  vertical-align: middle;
}
/* 主页任务时间线：保持信息密度和装饰都克制。 */
.md-typeset .task-board {
  --task-line: var(--md-default-fg-color--lightest);
  --task-accent: var(--md-primary-fg-color);
  margin: 2.5rem 0 3rem;
  padding: 1.35rem 1.5rem 1.5rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.35rem;
  background: var(--md-default-bg-color);
}

.md-typeset .task-board__heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.md-typeset .task-board__heading h2 {
  margin: 0.1rem 0 0;
}

.md-typeset .task-board__eyebrow {
  margin: 0;
  color: var(--md-primary-fg-color);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.md-typeset .task-board__intro {
  margin: 0.45rem 0 0;
  color: var(--md-default-fg-color--light);
  font-size: 0.86rem;
}

.md-typeset .task-history-toggle {
  flex: 0 0 auto;
  padding: 0.48rem 0.75rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.25rem;
  color: var(--md-default-fg-color);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
}

.md-typeset .task-history-toggle:hover,
.md-typeset .task-history-toggle:focus-visible {
  border-color: var(--task-accent);
  color: var(--task-accent);
  outline: none;
}

.md-typeset .task-board__status,
.md-typeset .task-board__fallback {
  margin: 0;
  color: var(--md-default-fg-color--light);
  font-size: 0.88rem;
}

.md-typeset .task-list {
  position: relative;
  margin-top: 0.4rem;
  padding-left: 1.45rem;
}

.md-typeset .task-list::before {
  position: absolute;
  top: 0.55rem;
  bottom: 0.55rem;
  left: 0.33rem;
  width: 1px;
  background: var(--task-line);
  content: "";
}

.md-typeset .task-card {
  position: relative;
  margin: 0;
  padding: 0.25rem 0 1.35rem;
}

.md-typeset .task-card:last-child {
  padding-bottom: 0.25rem;
}

.md-typeset .task-card[hidden] {
  display: none;
}

.md-typeset .task-card__marker {
  position: absolute;
  top: 0.48rem;
  left: -1.45rem;
  width: 0.68rem;
  height: 0.68rem;
  border: 2px solid var(--md-default-bg-color);
  border-radius: 50%;
  background: var(--md-default-fg-color--light);
  box-shadow: 0 0 0 1px var(--task-line);
}

.md-typeset .task-card--latest .task-card__marker {
  background: var(--task-accent);
  box-shadow: 0 0 0 1px var(--task-accent);
}

.md-typeset .task-card__label {
  margin: 0;
  color: var(--md-default-fg-color--light);
  font-size: 0.75rem;
}

.md-typeset .task-card--latest .task-card__label {
  color: var(--task-accent);
  font-weight: 700;
}

.md-typeset .task-card__body {
  margin-top: 0.3rem;
  padding: 0.85rem 1rem 0.9rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.3rem;
}

.md-typeset .task-card__content {
  margin: 0;
  white-space: pre-wrap;
}

.md-typeset .task-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.65rem;
  margin-top: 0.75rem;
  color: var(--md-default-fg-color--light);
  font-size: 0.8rem;
}

.md-typeset .task-card__deadline,
.md-typeset .task-card__countdown {
  font-variant-numeric: tabular-nums;
}

.md-typeset .task-card__deadline {
  color: var(--md-default-fg-color);
}

.md-typeset .task-card__countdown {
  margin-top: 0.25rem;
  color: var(--task-accent);
  font-size: 0.86rem;
  font-weight: 700;
}

.md-typeset .task-card--overdue .task-card__countdown {
  color: var(--md-default-fg-color--light);
}

@media screen and (max-width: 35em) {
  .md-typeset .task-board {
    padding: 1.1rem 1rem 1.2rem;
  }

  .md-typeset .task-board__heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .md-typeset .task-history-toggle {
    width: 100%;
  }
}


/* 主页任务时间线的图形化新建任务框。 */
.md-typeset .task-board__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.md-typeset .task-new-button,
.md-typeset .task-modal__submit {
  padding: 0.48rem 0.8rem;
  border: 1px solid var(--md-primary-fg-color);
  border-radius: 0.25rem;
  color: var(--md-primary-bg-color);
  background: var(--md-primary-fg-color);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
}

.md-typeset .task-new-button:hover,
.md-typeset .task-new-button:focus-visible,
.md-typeset .task-modal__submit:hover,
.md-typeset .task-modal__submit:focus-visible {
  filter: brightness(0.94);
  outline: none;
}

.md-typeset .task-modal[hidden] {
  display: none;
}

.md-typeset .task-modal {
  position: fixed;
  z-index: 30;
  inset: 0;
}

.md-typeset .task-modal__backdrop {
  display: grid;
  place-items: center;
  min-height: 100%;
  padding: 1rem;
  background: rgb(0 0 0 / 42%);
}

.md-typeset .task-modal__dialog {
  width: min(100%, 34rem);
  max-height: min(92vh, 42rem);
  overflow: auto;
  padding: 1.25rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.35rem;
  background: var(--md-default-bg-color);
  box-shadow: 0 1rem 3rem rgb(0 0 0 / 22%);
}

.md-typeset .task-modal__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.md-typeset .task-modal__header h3 {
  margin: 0.1rem 0 0;
}

.md-typeset .task-modal__close {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 50%;
  color: var(--md-default-fg-color);
  background: transparent;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
}

.md-typeset .task-modal__close:hover,
.md-typeset .task-modal__close:focus-visible {
  border-color: var(--task-accent);
  color: var(--task-accent);
  outline: none;
}

.md-typeset .task-form {
  display: grid;
  gap: 0.8rem;
}

.md-typeset .task-form__label,
.md-typeset .task-form__deadline legend {
  color: var(--md-default-fg-color);
  font-size: 0.84rem;
  font-weight: 700;
}

.md-typeset .task-form textarea,
.md-typeset .task-date-grid select {
  box-sizing: border-box;
  width: 100%;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.25rem;
  color: var(--md-default-fg-color);
  background: var(--md-default-bg-color);
  font: inherit;
}

.md-typeset .task-form textarea {
  display: block;
  min-height: 7rem;
  resize: vertical;
  padding: 0.7rem;
}

.md-typeset .task-form textarea:focus,
.md-typeset .task-date-grid select:focus {
  border-color: var(--task-accent);
  outline: 2px solid color-mix(in srgb, var(--task-accent) 22%, transparent);
  outline-offset: 1px;
}

.md-typeset .task-form__deadline {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.md-typeset .task-date-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.md-typeset .task-date-grid label {
  display: grid;
  gap: 0.3rem;
  color: var(--md-default-fg-color--light);
  font-size: 0.76rem;
}

.md-typeset .task-date-grid select {
  min-height: 2.35rem;
  padding: 0.35rem;
}

.md-typeset .task-form__note,
.md-typeset .task-form__status {
  margin: 0;
  color: var(--md-default-fg-color--light);
  font-size: 0.78rem;
}

.md-typeset .task-form__status {
  min-height: 1.2em;
  color: var(--task-accent);
}

.md-typeset .task-form__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.md-typeset .task-modal__cancel {
  padding: 0.48rem 0.8rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.25rem;
  color: var(--md-default-fg-color);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
}

.md-typeset .task-modal__cancel:hover,
.md-typeset .task-modal__cancel:focus-visible {
  border-color: var(--task-accent);
  color: var(--task-accent);
  outline: none;
}

body.task-modal-open {
  overflow: hidden;
}

@media screen and (max-width: 40em) {
  .md-typeset .task-board__actions {
    justify-content: flex-start;
  }

  .md-typeset .task-date-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media screen and (max-width: 25em) {
  .md-typeset .task-date-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}


/* 任务主页界面约定：紧凑、无冗余说明、操作控件优先。 */
.md-typeset .task-board {
  margin: 1.25rem 0 2rem;
  padding: 0;
  border: 0;
  background: transparent;
}

.md-typeset .task-board__heading {
  margin-bottom: 0.45rem;
}

.md-typeset .task-board__actions {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.md-typeset .task-new-button,
.md-typeset .task-modal__submit {
  padding: 0.42rem 0.72rem;
  border: 1px solid var(--md-primary-fg-color);
  border-radius: 0.22rem;
  color: var(--md-primary-bg-color);
  background: var(--md-primary-fg-color);
  cursor: pointer;
  font: inherit;
  font-size: 0.86rem;
}

.md-typeset .task-history-toggle {
  display: inline-grid;
  width: 2.35rem;
  height: 2rem;
  place-items: center;
  padding: 0;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0.22rem;
  color: var(--md-default-fg-color);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 1.35rem;
  line-height: 1;
}

.md-typeset .task-history-toggle:hover,
.md-typeset .task-history-toggle:focus-visible,
.md-typeset .task-new-button:hover,
.md-typeset .task-new-button:focus-visible {
  border-color: var(--task-accent);
  outline: none;
}

.md-typeset .task-card {
  position: relative;
  margin: 0;
  padding: 0.18rem 0 0.55rem;
}

.md-typeset .task-card[hidden] {
  display: none;
}

.md-typeset .task-card__marker {
  top: 0.9rem;
  width: 0.56rem;
  height: 0.56rem;
}

.md-typeset .task-card__body {
  position: relative;
  margin-top: 0;
  padding: 0.58rem 2.25rem 0.58rem 0.78rem;
  border-radius: 0.22rem;
  font-size: 0.9rem;
}

.md-typeset .task-card__content {
  margin: 0;
  line-height: 1.45;
}

.md-typeset .task-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.35rem;
  font-size: 0.82rem;
  line-height: 1.3;
}

.md-typeset .task-card__deadline,
.md-typeset .task-card__countdown {
  color: var(--md-default-fg-color--light);
  font-size: inherit;
  font-variant-numeric: tabular-nums;
}

.md-typeset .task-card__countdown {
  margin: 0;
  color: var(--task-accent);
  text-align: right;
  white-space: nowrap;
}

.md-typeset .task-card--overdue .task-card__countdown {
  color: var(--md-default-fg-color--light);
}

.md-typeset .task-delete-button {
  position: absolute;
  top: 0.42rem;
  right: 0.55rem;
  width: 1.35rem;
  height: 1.35rem;
  padding: 0;
  border: 0;
  color: var(--md-default-fg-color--light);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 1.15rem;
  line-height: 1;
}

.md-typeset .task-delete-button:hover,
.md-typeset .task-delete-button:focus-visible {
  color: var(--md-accent-fg-color);
  outline: none;
}

.md-typeset .task-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  clip-path: inset(50%);
}

.md-typeset .task-modal__dialog {
  width: min(100%, 30rem);
  max-height: min(92vh, 40rem);
  padding: 1rem;
}

.md-typeset .task-modal__header {
  margin-bottom: 0.75rem;
}

.md-typeset .task-modal__header h3 {
  margin: 0;
  font-size: 1rem;
}

.md-typeset .task-form {
  gap: 0.62rem;
}

.md-typeset .task-form textarea {
  min-height: 5.5rem;
  padding: 0.58rem;
}

.md-typeset .task-form__note {
  display: none;
}

.md-typeset .task-date-grid {
  gap: 0.38rem;
  margin-top: 0.35rem;
}

.md-typeset .task-date-grid select {
  min-height: 2rem;
  padding: 0.25rem;
  font-size: 0.82rem;
}

.md-typeset .task-form__status {
  min-height: 1.1em;
  margin: 0;
  color: var(--md-accent-fg-color);
  font-size: 0.8rem;
}

@media screen and (max-width: 40em) {
  .md-typeset .task-date-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media screen and (max-width: 25em) {
  .md-typeset .task-date-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}