:root {
  --mirage-bg: #eef2ff;
  --mirage-bg-deep: #dfe6ff;
  --mirage-surface: rgba(255, 255, 255, 0.72);
  --mirage-surface-strong: rgba(248, 249, 255, 0.92);
  --mirage-board-cover: #f0f2fa;
  --mirage-course-board: #e9edf7;
  --mirage-toc-bg: radial-gradient(ellipse at 24% 48%, rgba(238, 244, 255, 0.76), rgba(232, 235, 255, 0.38) 52%, transparent 78%);
  --mirage-note-bg: linear-gradient(135deg, rgba(221, 241, 255, 0.94), rgba(234, 231, 255, 0.94));
  --mirage-table-bg: #d9e8f0;
  --mirage-table-head-bg: #c3e2ee;
  --mirage-border: rgba(73, 91, 160, 0.18);
  --mirage-text: #17213f;
  --mirage-muted: #66708e;
  --mirage-cyan: #2989b8;
  --mirage-violet: #7357e8;
  --mirage-shadow: 0 28px 80px rgba(46, 58, 110, 0.16);
  --mirage-display: "Iowan Old Style", "Baskerville", "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --mirage-ui: "Avenir Next", "Inter", "PingFang SC", "Microsoft YaHei UI", sans-serif;
}

html[data-user-color-scheme="dark"],
html[data-default-color-scheme="dark"]:not([data-user-color-scheme]) {
  --mirage-bg: #060815;
  --mirage-bg-deep: #0a1025;
  --mirage-surface: rgba(12, 18, 42, 0.72);
  --mirage-surface-strong: rgba(10, 16, 37, 0.92);
  --mirage-board-cover: #0a1025;
  --mirage-course-board: #0a1025;
  --mirage-toc-bg: radial-gradient(ellipse at 24% 48%, rgba(8, 14, 35, 0.78), rgba(18, 17, 48, 0.4) 52%, transparent 78%);
  --mirage-note-bg: linear-gradient(135deg, rgba(20, 42, 70, 0.94), rgba(24, 29, 66, 0.94));
  --mirage-table-bg: rgba(9, 30, 40, 0.95);
  --mirage-table-head-bg: rgba(117, 232, 255, 0.08);
  --mirage-border: rgba(155, 178, 255, 0.16);
  --mirage-text: #f4f6ff;
  --mirage-muted: #a8b1ca;
  --mirage-cyan: #75e8ff;
  --mirage-violet: #aa8cff;
  --mirage-shadow: 0 32px 100px rgba(0, 0, 0, 0.42);
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  background:
    radial-gradient(circle at 11% 12%, rgba(58, 182, 255, 0.12), transparent 28rem),
    radial-gradient(circle at 88% 18%, rgba(126, 83, 255, 0.16), transparent 34rem),
    linear-gradient(145deg, var(--mirage-bg) 0%, var(--mirage-bg-deep) 58%, var(--mirage-bg) 100%);
  background-attachment: fixed;
  color: var(--mirage-text);
  font-family: var(--mirage-ui);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.28;
  background-image:
    linear-gradient(rgba(124, 145, 220, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 145, 220, 0.08) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}

::selection {
  color: #060815;
  background: #75e8ff;
}

a,
button,
.index-card,
.mirage-link-card {
  -webkit-tap-highlight-color: transparent;
}

/* Navigation */

.navbar {
  top: 20px;
  left: 50%;
  width: min(1392px, calc(100% - 64px));
  padding: 0.72rem 1.15rem;
  transform: translateX(-50%);
  border: 1px solid rgba(170, 190, 255, 0.16);
  border-radius: 22px;
  background: rgba(8, 13, 33, 0.62);
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(18px) saturate(145%);
  -webkit-backdrop-filter: blur(18px) saturate(145%);
  transform-origin: 50% 0;
  transition:
    transform 560ms cubic-bezier(0.16, 1.34, 0.3, 1),
    top 260ms ease,
    padding 260ms ease,
    background-color 260ms ease,
    box-shadow 260ms ease;
  will-change: transform;
}

.navbar.mirage-navbar-hidden {
  transform:
    translateX(-50%)
    translateY(calc(-100% - 2rem))
    scaleX(0.965)
    scaleY(0.88);
  pointer-events: none;
  transition-duration: 350ms, 260ms, 260ms, 260ms, 260ms;
  transition-timing-function:
    cubic-bezier(0.58, -0.24, 0.78, 0.28),
    ease,
    ease,
    ease,
    ease;
}

.navbar.scrolling-navbar.top-nav-collapse,
.navbar.navbar-col-show,
.navbar .dropdown-collapse {
  background: rgba(8, 13, 33, 0.86) !important;
}

.navbar.scrolling-navbar.top-nav-collapse {
  top: 8px;
  padding-top: 0.48rem;
  padding-bottom: 0.48rem;
}

.navbar .container {
  max-width: none;
}

.navbar .navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0;
  letter-spacing: 0.04em;
}

.navbar .nav-item .nav-link {
  position: relative;
  margin: 0 0.12rem;
  padding: 0.55rem 0.86rem;
  border-radius: 12px;
  color: rgba(244, 246, 255, 0.78);
  letter-spacing: 0.04em;
}

.navbar .nav-item .nav-link::after {
  position: absolute;
  right: 0.8rem;
  bottom: 0.28rem;
  left: 0.8rem;
  height: 1px;
  content: "";
  transform: scaleX(0);
  transform-origin: center;
  background: linear-gradient(90deg, #75e8ff, #aa8cff);
  transition: transform 180ms ease;
}

.navbar .nav-item .nav-link:hover,
.navbar .nav-item .nav-link:focus-visible {
  color: #fff;
  background: rgba(117, 232, 255, 0.08);
}

.navbar .nav-item .nav-link:hover::after,
.navbar .nav-item .nav-link:focus-visible::after {
  transform: scaleX(1);
}

.navbar .dropdown-menu {
  padding: 0.5rem;
  border: 1px solid rgba(170, 190, 255, 0.14);
  border-radius: 14px;
  background: rgba(8, 13, 33, 0.94);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(18px);
}

.navbar .dropdown-item {
  border-radius: 9px;
}

/* Hero */

.header-inner {
  background: var(--mirage-bg);
}

#banner {
  position: relative;
  z-index: 3;
  background-image: none !important;
  background-color: #060815 !important;
}

#banner::before,
#banner::after {
  position: absolute;
  inset: -18%;
  content: "";
  pointer-events: none;
}

#banner::before {
  background:
    radial-gradient(ellipse at 13% 32%, rgba(49, 203, 255, 0.17), transparent 27%),
    radial-gradient(ellipse at 76% 28%, rgba(99, 83, 255, 0.26), transparent 32%),
    radial-gradient(ellipse at 92% 70%, rgba(152, 83, 255, 0.18), transparent 25%);
  filter: blur(20px);
  animation: mirage-aurora 13s ease-in-out infinite alternate;
}

#banner::after {
  opacity: 0.24;
  background-image:
    linear-gradient(rgba(117, 232, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(117, 232, 255, 0.08) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(circle at 50% 45%, black, transparent 72%);
}

body:not(.is-home) #banner {
  isolation: isolate;
  background:
    radial-gradient(ellipse at -3% 11%, rgba(27, 188, 220, 0.27), transparent 31%),
    radial-gradient(ellipse at 19% 106%, rgba(26, 119, 191, 0.18), transparent 33%),
    radial-gradient(ellipse at 102% 63%, rgba(132, 73, 218, 0.3), transparent 37%),
    radial-gradient(ellipse at 73% -14%, rgba(67, 85, 190, 0.16), transparent 31%),
    linear-gradient(127deg, #040916 0%, #07091c 48%, #090821 100%) !important;
}

body:not(.is-home) #banner::before {
  inset: -13% -7%;
  z-index: 0;
  opacity: 1;
  background:
    radial-gradient(
      ellipse 73% 116% at -17% 91%,
      transparent 0 38%,
      rgba(42, 221, 235, 0.44) 44%,
      rgba(28, 134, 205, 0.2) 51%,
      transparent 60%
    ),
    radial-gradient(
      ellipse 49% 83% at 17% 111%,
      transparent 0 39%,
      rgba(31, 152, 218, 0.32) 46%,
      rgba(36, 90, 181, 0.12) 54%,
      transparent 64%
    ),
    radial-gradient(
      ellipse 41% 68% at 42% -25%,
      transparent 0 36%,
      rgba(64, 120, 218, 0.22) 45%,
      transparent 58%
    ),
    radial-gradient(
      ellipse 75% 121% at 116% -8%,
      transparent 0 35%,
      rgba(158, 79, 232, 0.42) 43%,
      rgba(76, 91, 211, 0.19) 52%,
      transparent 62%
    ),
    radial-gradient(
      ellipse 43% 62% at 88% 118%,
      transparent 0 37%,
      rgba(122, 70, 218, 0.28) 46%,
      transparent 61%
    ),
    radial-gradient(
      ellipse 34% 56% at 67% -12%,
      transparent 0 42%,
      rgba(84, 76, 205, 0.22) 49%,
      transparent 62%
    ),
    radial-gradient(ellipse 26% 43% at 4% 33%, rgba(23, 196, 224, 0.2), transparent 72%),
    radial-gradient(ellipse 27% 47% at 96% 71%, rgba(141, 68, 221, 0.22), transparent 73%);
  filter: blur(11px) saturate(142%);
  mix-blend-mode: screen;
  transform-origin: 39% 61%;
  animation: mirage-nebula-drift 26s cubic-bezier(0.42, 0, 0.22, 1) infinite alternate;
  will-change: transform;
}

body:not(.is-home) #banner::after {
  inset: -15% -8%;
  z-index: 0;
  opacity: 0.82;
  background-image:
    repeating-radial-gradient(
      ellipse 78% 126% at -15% 112%,
      transparent 0 13px,
      rgba(87, 216, 232, 0.105) 15px,
      transparent 18px 31px
    ),
    repeating-radial-gradient(
      ellipse 56% 91% at 21% 119%,
      transparent 0 18px,
      rgba(49, 145, 211, 0.085) 20px,
      transparent 23px 39px
    ),
    repeating-radial-gradient(
      ellipse 73% 116% at 115% -17%,
      transparent 0 16px,
      rgba(169, 103, 231, 0.095) 18px,
      transparent 21px 36px
    ),
    repeating-radial-gradient(
      ellipse 49% 78% at 83% 118%,
      transparent 0 21px,
      rgba(119, 88, 218, 0.075) 23px,
      transparent 26px 45px
    ),
    repeating-linear-gradient(
      112deg,
      transparent 0 17px,
      rgba(62, 151, 210, 0.035) 18px,
      transparent 20px 37px
    );
  background-position: 0 0, 2% 3%, 100% 0, 96% 100%, 0 0;
  background-size: 100% 100%, 103% 106%, 100% 100%, 106% 102%, 170% 170%;
  filter: blur(0.35px);
  mask-image: linear-gradient(108deg, #000 0%, rgba(0, 0, 0, 0.72) 29%, transparent 48%, rgba(0, 0, 0, 0.58) 67%, #000 100%);
  -webkit-mask-image: linear-gradient(108deg, #000 0%, rgba(0, 0, 0, 0.72) 29%, transparent 48%, rgba(0, 0, 0, 0.58) 67%, #000 100%);
  mix-blend-mode: screen;
  animation: mirage-ink-sand 33s ease-in-out infinite alternate;
  will-change: transform, background-position;
}

#banner .mask {
  overflow: hidden;
  background: linear-gradient(110deg, rgba(4, 7, 20, 0.25), rgba(7, 9, 28, 0.6)) !important;
}

body:not(.is-home) #banner .mask {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse at 50% 47%, rgba(3, 5, 17, 0.43) 0 13%, rgba(4, 7, 20, 0.11) 39%, transparent 72%),
    linear-gradient(118deg, rgba(3, 7, 20, 0.035), rgba(8, 7, 29, 0.1)) !important;
}

.banner-text {
  position: relative;
  z-index: 2;
  width: min(1392px, calc(100% - 96px));
  max-width: none;
  text-align: left !important;
}

.is-home .banner-text {
  display: flex;
  align-items: center;
  min-height: 70vh;
}

.mirage-home-hero {
  position: relative;
  z-index: 2;
  width: 58%;
  padding-top: 4rem;
}

.mirage-home-title {
  max-width: 16em;
  margin: 0 auto;
  color: #f4f6ff;
  font-family: var(--mirage-display);
  font-size: clamp(2.35rem, 4.2vw, 3.75rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.025em;
  text-align: center;
  text-wrap: balance;
  text-shadow: 0 0 60px rgba(117, 232, 255, 0.1);
}

.mirage-home-subtitle {
  width: fit-content;
  max-width: 40rem;
  margin: 2rem auto 0;
  color: rgba(224, 229, 248, 0.8);
  font-family: var(--mirage-display);
  font-size: clamp(1.05rem, 1.7vw, 1.45rem);
  letter-spacing: 0.12em;
  line-height: 1.8;
  text-align: center;
}

.mirage-orbit {
  position: absolute;
  top: 50%;
  right: 2%;
  width: min(42vw, 43rem);
  aspect-ratio: 1;
  transform: translateY(-47%);
  opacity: 0.78;
  pointer-events: none;
}

.orbit-ring,
.orbit-core,
.orbit-node {
  position: absolute;
  display: block;
  border-radius: 50%;
}

.orbit-ring {
  top: 50%;
  left: 50%;
  border: 1px solid rgba(135, 188, 255, 0.34);
}

.orbit-ring-a {
  width: 82%;
  height: 48%;
  transform: translate(-50%, -50%) rotate(17deg);
  animation: mirage-orbit-a 18s linear infinite;
}

.orbit-ring-b {
  width: 74%;
  height: 39%;
  transform: translate(-50%, -50%) rotate(82deg);
  border-color: rgba(170, 140, 255, 0.42);
  animation: mirage-orbit-b 22s linear infinite reverse;
}

.orbit-ring-c {
  width: 56%;
  height: 56%;
  transform: translate(-50%, -50%) rotate(-14deg);
  border-color: rgba(117, 232, 255, 0.2);
}

.orbit-core {
  top: 50%;
  left: 50%;
  width: 18%;
  height: 18%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at 36% 32%, rgba(255, 255, 255, 0.84), rgba(92, 102, 218, 0.2) 22%, rgba(53, 51, 134, 0.12) 55%, transparent 72%);
  filter: blur(1px);
  box-shadow: 0 0 80px rgba(94, 94, 246, 0.22);
}

.orbit-node {
  width: 0.72rem;
  height: 0.72rem;
  background: #f4f6ff;
  box-shadow: 0 0 12px #fff, 0 0 30px #75e8ff;
}

.orbit-node-a {
  top: 30%;
  right: 10%;
}

.orbit-node-b {
  bottom: 20%;
  left: 27%;
  width: 0.48rem;
  height: 0.48rem;
  background: #aa8cff;
}

.scroll-down-bar {
  bottom: 2rem;
}

.scroll-down-bar i {
  color: #75e8ff;
  filter: drop-shadow(0 0 8px rgba(117, 232, 255, 0.58));
}

body:not(.is-home) .banner-text {
  text-align: center !important;
}

body:not(.is-home) #subtitle {
  font-family: var(--mirage-display);
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

/* Main surfaces */

main {
  position: relative;
}

#board {
  border: 1px solid var(--mirage-border);
  border-radius: 28px;
  background:
    radial-gradient(circle at var(--pointer-x, 86%) var(--pointer-y, 5%), rgba(117, 232, 255, 0.08), transparent 18rem),
    var(--mirage-board-cover);
  box-shadow: var(--mirage-shadow);
  backdrop-filter: blur(22px) saturate(130%);
  -webkit-backdrop-filter: blur(22px) saturate(130%);
}

#board:has(.course-table-shell) {
  background:
    radial-gradient(circle at var(--pointer-x, 86%) var(--pointer-y, 5%), rgba(117, 232, 255, 0.08), transparent 18rem),
    var(--mirage-course-board);
}

.is-home #board {
  margin-top: -3.2rem !important;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.mirage-link-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.15fr 0.95fr;
  gap: 1.1rem;
  margin-bottom: 2.6rem;
}

.mirage-link-card,
.index-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--mirage-border);
  border-radius: 24px;
  background:
    radial-gradient(circle at var(--pointer-x, 90%) var(--pointer-y, 10%), rgba(117, 232, 255, 0.12), transparent 12rem),
    linear-gradient(145deg, var(--mirage-surface), rgba(76, 70, 160, 0.08));
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.12);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.mirage-link-card::before,
.index-card::before {
  position: absolute;
  inset: 0;
  z-index: 0;
  content: "";
  opacity: 0;
  background: linear-gradient(120deg, transparent 24%, rgba(117, 232, 255, 0.08), transparent 72%);
  transform: translateX(-28%);
  transition: opacity 220ms ease, transform 500ms ease;
  pointer-events: none;
}

.mirage-link-card:hover,
.mirage-link-card:focus-visible,
.index-card:hover {
  transform: translateY(-5px);
  border-color: rgba(117, 232, 255, 0.34);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.2), 0 0 40px rgba(117, 232, 255, 0.05);
}

.mirage-link-card:hover::before,
.mirage-link-card:focus-visible::before,
.index-card:hover::before {
  opacity: 1;
  transform: translateX(20%);
}

.mirage-link-card {
  display: flex;
  min-height: 13rem;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.7rem;
  color: var(--mirage-text);
  outline: none;
}

.mirage-card-number {
  position: absolute;
  top: 1.25rem;
  right: 1.4rem;
  color: var(--mirage-muted);
  font-family: var(--mirage-display);
  font-size: 0.86rem;
  opacity: 0.58;
}

.mirage-card-title {
  position: relative;
  z-index: 1;
  max-width: 86%;
  font-family: var(--mirage-display);
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  line-height: 1.15;
}

.mirage-card-arrow {
  position: absolute;
  right: 1.45rem;
  bottom: 1.35rem;
  display: grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  border: 1px solid rgba(117, 232, 255, 0.24);
  border-radius: 50%;
  color: var(--mirage-cyan);
  transition: transform 220ms ease, background 220ms ease;
}

.mirage-link-card:hover .mirage-card-arrow,
.mirage-link-card:focus-visible .mirage-card-arrow {
  transform: rotate(45deg);
  background: rgba(117, 232, 255, 0.1);
}

.index-card {
  margin-bottom: 1.4rem;
  padding: 1rem;
  border: 0;
  background:
    radial-gradient(circle at var(--pointer-x, 90%) var(--pointer-y, 10%), rgba(117, 232, 255, 0.1), transparent 13rem),
    linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(231, 236, 255, 0.88));
}

html[data-user-color-scheme="dark"] .index-card,
html[data-default-color-scheme="dark"]:not([data-user-color-scheme]) .index-card {
  background:
    radial-gradient(circle at var(--pointer-x, 90%) var(--pointer-y, 10%), rgba(117, 232, 255, 0.13), transparent 13rem),
    linear-gradient(145deg, rgba(20, 30, 67, 0.96), rgba(16, 24, 57, 0.96));
  box-shadow: 0 20px 56px rgba(0, 0, 0, 0.24);
}

.index-card > * {
  position: relative;
  z-index: 1;
}

.index-header {
  font-family: var(--mirage-display);
  font-size: 2rem;
  font-weight: 400;
}

.index-header a {
  color: var(--mirage-text);
}

.index-excerpt,
.index-btm,
.index-btm a {
  color: var(--mirage-muted);
}

.index-img img {
  border: 1px solid var(--mirage-border);
  border-radius: 18px;
  box-shadow: none;
}

.pagination .page-number,
.pagination .extend {
  border: 1px solid var(--mirage-border);
  border-radius: 10px;
  background: var(--mirage-surface);
}

/* Content */

.post-content,
.page-content,
.about-content {
  max-width: 980px;
}

.markdown-body {
  color: var(--mirage-text);
  font-family: var(--mirage-ui);
  font-size: 1rem;
  line-height: 1.88;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  color: var(--mirage-text);
  font-family: var(--mirage-display);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.markdown-body h2 {
  position: relative;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--mirage-border);
}

.markdown-body h2::after {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 4rem;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, var(--mirage-cyan), var(--mirage-violet));
}

.markdown-body .course-category-title {
  margin-bottom: 0.7rem;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.45;
}

.markdown-body a {
  color: var(--mirage-cyan) !important;
  text-decoration: none;
  text-decoration-color: rgba(117, 232, 255, 0.34);
  text-underline-offset: 0.2em;
}

.markdown-body a:hover {
  color: var(--mirage-violet) !important;
  text-decoration: underline;
}

.markdown-body strong {
  color: var(--mirage-text);
}

.markdown-body blockquote {
  border-left: 2px solid var(--mirage-cyan);
  color: var(--mirage-muted);
  background: rgba(117, 232, 255, 0.05);
}

.markdown-body code:not(pre code) {
  border: 1px solid var(--mirage-border);
  border-radius: 6px;
  background: rgba(117, 232, 255, 0.07);
}

.markdown-body .note {
  padding: 1rem 1.1rem;
  border: 1px solid var(--mirage-border);
  border-left: 3px solid var(--mirage-cyan);
  border-radius: 16px;
  color: var(--mirage-text);
  background: var(--mirage-note-bg);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.08);
}

.markdown-body .note > :first-child {
  margin-top: 0 !important;
}

.markdown-body .note > h2:not(:first-child) {
  margin-top: 1rem !important;
}

.markdown-body .note > p:has(+ ul),
.markdown-body .note > p:has(+ ol) {
  margin-bottom: 0.25rem !important;
}

.markdown-body .note > p + ul,
.markdown-body .note > p + ol {
  margin-top: 0 !important;
}

.markdown-body .note.note-success {
  border-left-color: #80e6bd;
}

.markdown-body .note.note-info {
  border-left-color: #aa8cff;
}

.markdown-body .note.note-warning {
  border-left-color: #f0a84b;
}

.markdown-body hr,
.markdown-body hr[style] {
  height: 1px !important;
  margin: 2.5rem 0 !important;
  border: 0 !important;
  background: linear-gradient(90deg, transparent, var(--mirage-border), transparent) !important;
}

.markdown-body table {
  width: 100% !important;
  margin: 1.4rem 0 !important;
  border-collapse: separate !important;
  border: 1px solid var(--mirage-border) !important;
  border-spacing: 0 !important;
  border-radius: 14px;
  background: transparent !important;
  box-shadow: none !important;
}

.markdown-body table thead,
.markdown-body table thead tr,
.markdown-body table thead th {
  color: var(--mirage-text) !important;
  background: rgba(117, 232, 255, 0.08) !important;
}

.markdown-body table tr,
.markdown-body table tr:nth-child(2n),
.markdown-body table td,
.markdown-body table th {
  border-color: var(--mirage-border) !important;
  color: var(--mirage-text) !important;
  background-color: transparent !important;
}

.markdown-body table tr:hover td {
  background: rgba(117, 232, 255, 0.045) !important;
}

.markdown-body > div[style*="text-align: center"] {
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: thin;
}

.markdown-body .course-table-shell {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  text-align: center;
  scrollbar-width: thin;
}

.markdown-body .course-table-shell .course-table {
  display: table !important;
  margin: 1.4rem auto 0 !important;
  border: 0 !important;
  border-collapse: collapse !important;
  border-radius: 0;
  background: var(--mirage-table-bg) !important;
  box-shadow: none !important;
}

.markdown-body .course-table-shell .course-table thead {
  background: var(--mirage-table-head-bg) !important;
}

.markdown-body .course-table-shell + hr + .note {
  margin-top: 0 !important;
}

.markdown-body .course-table--schedule {
  width: min(100%, 1050px) !important;
  min-width: 880px;
  table-layout: fixed;
  font-size: 0.94rem;
  line-height: 1.55;
}

.markdown-body .course-table--schedule th,
.markdown-body .course-table--schedule td {
  padding: 0.72rem 0.45rem !important;
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
  line-break: strict;
  text-wrap: pretty;
}

.markdown-body .course-table--schedule thead th:nth-child(1) {
  width: 6% !important;
}

.markdown-body .course-table--schedule thead th:nth-child(2) {
  width: 6% !important;
}

.markdown-body .course-table--schedule thead th:nth-child(3) {
  width: 7% !important;
}

.markdown-body .course-table--schedule thead th:nth-child(4) {
  width: 28% !important;
}

.markdown-body .course-table--schedule thead th:nth-child(5) {
  width: 36% !important;
}

.markdown-body .course-table--schedule thead th:nth-child(6) {
  width: 9% !important;
}

.markdown-body .course-table--schedule thead th:nth-child(7) {
  width: 8% !important;
}

.markdown-body .course-table--schedule th:last-child,
.markdown-body .course-table--schedule td:last-child,
.markdown-body .course-table--schedule td:last-child a {
  white-space: nowrap;
}

.markdown-body .course-table--lectures {
  width: min(100%, 720px) !important;
  min-width: 0;
}

.markdown-body .course-table--tutorials {
  width: min(100%, 860px) !important;
  min-width: 0;
}

.markdown-body img {
  border: 1px solid var(--mirage-border);
  border-radius: 18px !important;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18) !important;
}

.markdown-body .katex-block {
  margin: 3pt 0 !important;
  padding: 2px 0;
}

.markdown-body .katex-block + .katex-block {
  margin-top: 6pt !important;
}

.markdown-body :not(.katex-block):has(+ .katex-block) {
  margin-bottom: 0 !important;
}

.katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  margin: 0 !important;
  padding: 0;
}

.katex {
  color: var(--mirage-text);
}

.pdf-shell {
  overflow: hidden;
  margin: 1.6rem 0 0;
  border: 1px solid var(--mirage-border);
  border-radius: 22px;
  background: rgba(3, 6, 20, 0.48);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.2);
}

.pdf-shell iframe,
.pdf-shell object {
  display: block;
  width: 100%;
  height: min(78vh, 920px);
  min-height: 620px;
  border: 0;
  background: #fff;
}

.pdf-fallback {
  margin: 0;
  padding: 1rem 1.25rem;
  color: var(--mirage-muted);
  text-align: center;
}

.about-avatar img {
  border: 2px solid rgba(117, 232, 255, 0.44);
  box-shadow: 0 0 0 8px rgba(117, 232, 255, 0.05), 0 24px 70px rgba(0, 0, 0, 0.28);
}

.about-name {
  font-family: var(--mirage-display);
  font-size: 2.5rem;
  font-weight: 400;
}

.about-intro {
  color: var(--mirage-muted);
  font-family: var(--mirage-display);
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

#scroll-top-button {
  border: 1px solid var(--mirage-border);
  background: var(--mirage-surface-strong);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(16px);
}

#comments {
  position: relative;
  overflow: hidden;
  margin-top: 2.4rem;
  padding: 1.4rem 1.5rem 1.55rem;
  border: 1px solid var(--mirage-border);
  border-left: 3px solid var(--mirage-cyan);
  border-radius: 22px;
  background:
    radial-gradient(circle at 92% 0%, rgba(117, 232, 255, 0.11), transparent 18rem),
    radial-gradient(circle at 7% 100%, rgba(170, 140, 255, 0.08), transparent 16rem),
    var(--mirage-surface-strong);
  box-shadow: var(--mirage-shadow);
}

#comments::before {
  display: block;
  margin-bottom: 1.15rem;
  padding-bottom: 0.72rem;
  border-bottom: 1px solid var(--mirage-border);
  color: var(--mirage-text);
  content: "评论";
  font-family: var(--mirage-display);
  font-size: 1.45rem;
  line-height: 1.35;
}

#comments .cusdis,
#comments #cusdis_thread {
  width: 100%;
}

#comments .cusdis {
  overflow: hidden;
  border-radius: 16px;
}

#comments #cusdis_thread:not(.cusdis-ready),
#comments #cusdis_thread:not(.cusdis-ready) iframe {
  min-height: 20rem;
}

#comments #cusdis_thread iframe {
  display: block;
  width: 100% !important;
  max-width: 100%;
  border: 0 !important;
  background: transparent;
  overflow: hidden;
  transition: height 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.sidebar {
  z-index: 4;
}

#toc {
  position: relative;
  z-index: 4;
  margin-right: -0.5rem;
  margin-left: -0.5rem;
  padding: 0.9rem 0.5rem;
}

#toc::before {
  position: absolute;
  inset: -0.6rem -0.8rem;
  z-index: -1;
  content: "";
  background: var(--mirage-toc-bg);
  pointer-events: none;
}

footer {
  color: var(--mirage-muted);
}

footer a {
  color: var(--mirage-cyan);
}

/* 404 */

.is-mirage-404 .page-content {
  max-width: 1040px;
}

.is-mirage-404 #board {
  overflow: hidden;
}

.mirage-404 {
  position: relative;
  isolation: isolate;
  display: flex;
  min-height: 34rem;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding: 2.5rem 1.25rem 3rem;
  text-align: center;
}

.mirage-404::before {
  position: absolute;
  z-index: -1;
  width: min(70vw, 44rem);
  height: min(70vw, 44rem);
  border-radius: 50%;
  content: "";
  background:
    radial-gradient(circle, rgba(117, 232, 255, 0.13), rgba(170, 140, 255, 0.08) 34%, transparent 68%);
  filter: blur(4px);
}

.mirage-404__visual {
  position: relative;
  display: grid;
  width: min(100%, 34rem);
  height: 13rem;
  place-items: center;
  margin-bottom: 0.5rem;
}

.mirage-404__number {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  color: transparent;
  background: linear-gradient(115deg, var(--mirage-cyan), var(--mirage-violet) 72%);
  background-clip: text;
  -webkit-background-clip: text;
  font-family: var(--mirage-display);
  font-size: clamp(6.5rem, 15vw, 10.5rem);
  font-weight: 400;
  font-kerning: none;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "kern" 0, "tnum" 1;
  line-height: 1;
  letter-spacing: 0;
  padding-right: 0.12em;
  margin-right: -0.12em;
  filter: drop-shadow(0 16px 34px rgba(63, 77, 178, 0.16));
}

.mirage-404__digit {
  display: inline-grid;
  flex: 0 0 auto;
  place-items: center;
  -webkit-text-fill-color: transparent;
}

.mirage-404__digit--four {
  width: 0.58em;
}

.mirage-404__digit--zero {
  width: 0.52em;
  margin-inline: -0.02em;
}

.mirage-404__ring,
.mirage-404__node {
  position: absolute;
  display: block;
  border-radius: 50%;
  pointer-events: none;
}

.mirage-404__ring {
  top: 50%;
  left: 50%;
  border: 1px solid rgba(41, 137, 184, 0.32);
}

.mirage-404__ring--one {
  width: 72%;
  height: 44%;
  transform: translate(-50%, -50%) rotate(12deg);
  animation: mirage-404-orbit-one 16s linear infinite;
}

.mirage-404__ring--two {
  width: 64%;
  height: 38%;
  transform: translate(-50%, -50%) rotate(78deg);
  border-color: rgba(115, 87, 232, 0.35);
  animation: mirage-404-orbit-two 20s linear infinite reverse;
}

.mirage-404__ring--three {
  width: 48%;
  height: 48%;
  transform: translate(-50%, -50%);
  border-color: rgba(41, 137, 184, 0.18);
}

.mirage-404__node {
  z-index: 3;
  width: 0.58rem;
  height: 0.58rem;
  background: var(--mirage-cyan);
  box-shadow: 0 0 12px rgba(117, 232, 255, 0.82), 0 0 30px rgba(117, 232, 255, 0.42);
}

.mirage-404__node--one {
  top: 25%;
  right: 18%;
}

.mirage-404__node--two {
  bottom: 22%;
  left: 21%;
  width: 0.44rem;
  height: 0.44rem;
  background: var(--mirage-violet);
  box-shadow: 0 0 12px rgba(170, 140, 255, 0.86), 0 0 28px rgba(170, 140, 255, 0.4);
}

.markdown-body .mirage-404__title {
  margin: 0;
  color: var(--mirage-text);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.mirage-404__description {
  max-width: 34rem;
  margin: 1rem auto 0;
  color: var(--mirage-muted);
  font-size: 1rem;
  line-height: 1.8;
}

.mirage-404__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.markdown-body .mirage-404__action {
  display: inline-flex;
  min-width: 8.5rem;
  min-height: 2.8rem;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border: 1px solid var(--mirage-border);
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none !important;
  box-shadow: 0 12px 28px rgba(38, 54, 120, 0.12);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.markdown-body .mirage-404__action--primary {
  border: 0;
  padding: calc(0.65rem + 1px) calc(1.25rem + 1px);
  color: #071225 !important;
  background: linear-gradient(105deg, #75e8ff, #a995ff);
}

.markdown-body .mirage-404__action--secondary {
  color: var(--mirage-text) !important;
  background: var(--mirage-surface);
}

.markdown-body .mirage-404__action:hover,
.markdown-body .mirage-404__action:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(117, 232, 255, 0.48);
  box-shadow: 0 18px 38px rgba(38, 54, 120, 0.2);
}

@keyframes mirage-404-orbit-one {
  from { transform: translate(-50%, -50%) rotate(12deg); }
  to { transform: translate(-50%, -50%) rotate(372deg); }
}

@keyframes mirage-404-orbit-two {
  from { transform: translate(-50%, -50%) rotate(78deg); }
  to { transform: translate(-50%, -50%) rotate(438deg); }
}

/* Side-gutter geometry network */

.mirage-gutter-canvas {
  position: fixed;
  top: 0;
  z-index: 2;
  display: block;
  height: 100vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity 420ms ease;
  contain: strict;
}

.mirage-gutter-canvas.is-visible {
  opacity: 0.92;
}

/* Motion */

.mirage-motion-ready .mirage-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 650ms ease, transform 650ms cubic-bezier(0.2, 0.75, 0.25, 1);
}

.mirage-motion-ready .mirage-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes mirage-aurora {
  from { transform: translate3d(-2%, -1%, 0) rotate(-2deg) scale(1); }
  to { transform: translate3d(3%, 2%, 0) rotate(2deg) scale(1.06); }
}

@keyframes mirage-nebula-drift {
  0% {
    transform: translate3d(-3.5%, 1.5%, 0) rotate(-5deg) scale(1.03, 0.96);
  }
  38% {
    transform: translate3d(1.8%, -2.4%, 0) rotate(-1deg) scale(1.08, 0.94);
  }
  71% {
    transform: translate3d(-0.8%, 2.8%, 0) rotate(3deg) scale(1.02, 1.04);
  }
  100% {
    transform: translate3d(3.2%, -1.2%, 0) rotate(6deg) scale(1.09, 0.98);
  }
}

@keyframes mirage-ink-sand {
  0% {
    background-position: 0 0, 2% 3%, 100% 0, 96% 100%, 0 0;
    transform: translate3d(-1%, 0.8%, 0) rotate(-0.7deg) scale(1.02);
  }
  43% {
    background-position: 2% -3%, -1% 6%, 97% 4%, 101% 96%, 7% -5%;
    transform: translate3d(1.2%, -0.9%, 0) rotate(0.35deg) scale(1.035);
  }
  100% {
    background-position: -3% 5%, 6% -2%, 104% -3%, 92% 105%, -9% 8%;
    transform: translate3d(-0.4%, 1.4%, 0) rotate(0.9deg) scale(1.015);
  }
}

@keyframes mirage-orbit-a {
  from { transform: translate(-50%, -50%) rotate(17deg); }
  to { transform: translate(-50%, -50%) rotate(377deg); }
}

@keyframes mirage-orbit-b {
  from { transform: translate(-50%, -50%) rotate(82deg); }
  to { transform: translate(-50%, -50%) rotate(442deg); }
}

@media (max-width: 991px) {
  .navbar {
    width: calc(100% - 28px);
  }

  .navbar-collapse {
    margin-top: 0.75rem;
    padding: 0.5rem;
    border: 1px solid rgba(170, 190, 255, 0.12);
    border-radius: 14px;
    background: rgba(8, 13, 33, 0.94);
  }

  .mirage-home-hero {
    width: 70%;
  }

  .mirage-orbit {
    right: -12%;
    width: 54vw;
    opacity: 0.46;
  }

  .mirage-link-grid {
    grid-template-columns: 1fr 1fr;
  }

  .mirage-link-card:last-child {
    grid-column: 1 / -1;
  }

  .markdown-body [style*="display: flex"] {
    flex-wrap: wrap !important;
    gap: 1.2rem;
  }

  .markdown-body [style*="display: flex"] > div {
    width: 100% !important;
  }
}

@media (max-width: 767px) {
  body::before {
    background-size: 48px 48px;
  }

  body:not(.is-home) #banner::before {
    inset: -10% -18%;
    background:
      radial-gradient(
        ellipse 72vmax 44vmax at -42% 96%,
        transparent 0 35%,
        rgba(42, 221, 235, 0.43) 43%,
        rgba(28, 134, 205, 0.2) 50%,
        transparent 59%
      ),
      radial-gradient(
        ellipse 55vmax 32vmax at -25% 18%,
        transparent 0 38%,
        rgba(31, 174, 218, 0.3) 46%,
        rgba(36, 90, 181, 0.11) 54%,
        transparent 64%
      ),
      radial-gradient(
        ellipse 48vmax 29vmax at 47% -18%,
        transparent 0 38%,
        rgba(64, 120, 218, 0.21) 46%,
        transparent 59%
      ),
      radial-gradient(
        ellipse 74vmax 45vmax at 140% -10%,
        transparent 0 34%,
        rgba(158, 79, 232, 0.4) 43%,
        rgba(76, 91, 211, 0.18) 51%,
        transparent 61%
      ),
      radial-gradient(
        ellipse 58vmax 35vmax at 126% 96%,
        transparent 0 37%,
        rgba(122, 70, 218, 0.27) 46%,
        transparent 61%
      ),
      radial-gradient(ellipse 30vmax 24vmax at 2% 47%, rgba(23, 196, 224, 0.2), transparent 72%),
      radial-gradient(ellipse 31vmax 25vmax at 98% 58%, rgba(141, 68, 221, 0.22), transparent 73%);
    filter: blur(9px) saturate(145%);
    transform-origin: 50% 55%;
  }

  body:not(.is-home) #banner::after {
    inset: -12% -20%;
    background-image:
      repeating-radial-gradient(
        ellipse 76vmax 48vmax at -50% 110%,
        transparent 0 14px,
        rgba(87, 216, 232, 0.105) 16px,
        transparent 19px 33px
      ),
      repeating-radial-gradient(
        ellipse 58vmax 37vmax at -22% 10%,
        transparent 0 19px,
        rgba(49, 145, 211, 0.085) 21px,
        transparent 24px 41px
      ),
      repeating-radial-gradient(
        ellipse 78vmax 49vmax at 150% -12%,
        transparent 0 16px,
        rgba(169, 103, 231, 0.095) 18px,
        transparent 21px 37px
      ),
      repeating-radial-gradient(
        ellipse 60vmax 38vmax at 125% 106%,
        transparent 0 22px,
        rgba(119, 88, 218, 0.075) 24px,
        transparent 27px 46px
      ),
      repeating-linear-gradient(
        118deg,
        transparent 0 20px,
        rgba(62, 151, 210, 0.03) 21px,
        transparent 23px 43px
      );
    background-position: 0 0, 0 2%, 100% 0, 100% 100%, 0 0;
    background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 190% 150%;
    mask-image: linear-gradient(96deg, #000 0%, rgba(0, 0, 0, 0.76) 31%, transparent 49%, rgba(0, 0, 0, 0.64) 69%, #000 100%);
    -webkit-mask-image: linear-gradient(96deg, #000 0%, rgba(0, 0, 0, 0.76) 31%, transparent 49%, rgba(0, 0, 0, 0.64) 69%, #000 100%);
  }

  .navbar {
    top: 10px;
    padding: 0.58rem 0.7rem;
    border-radius: 18px;
  }

  .banner-text {
    width: calc(100% - 38px);
  }

  .is-home .banner-text {
    align-items: flex-end;
    min-height: 76vh;
    padding-bottom: 7rem;
  }

  .mirage-home-hero {
    width: 100%;
  }

  .mirage-home-title {
    max-width: 100%;
    font-size: clamp(2.1rem, 10vw, 2.9rem);
    line-height: 1.2;
  }

  .mirage-home-subtitle {
    max-width: 92%;
    margin-top: 1.4rem;
    font-size: 1rem;
    letter-spacing: 0.06em;
  }

  .mirage-orbit {
    top: 39%;
    right: -28%;
    width: 88vw;
    opacity: 0.28;
  }

  .is-home #board {
    margin-top: -2.2rem !important;
  }

  .mirage-link-grid {
    grid-template-columns: 1fr;
  }

  .mirage-link-card:last-child {
    grid-column: auto;
  }

  .mirage-link-card {
    min-height: 10.5rem;
  }

  #board {
    border-radius: 20px;
  }

  .page-content,
  .post-content,
  .about-content {
    padding-right: 0.35rem;
    padding-left: 0.35rem;
  }

  .markdown-body {
    font-size: 0.98rem;
    line-height: 1.78;
  }

  .markdown-body table {
    min-width: 690px;
  }

  .markdown-body .course-table--schedule {
    min-width: 880px;
  }

  .markdown-body .course-table--lectures {
    min-width: 620px;
  }

  .markdown-body .course-table--tutorials {
    min-width: 780px;
  }

  .pdf-shell iframe,
  .pdf-shell object {
    height: 70vh;
    min-height: 480px;
  }

  .mirage-404 {
    min-height: 28rem;
    padding-right: 0.5rem;
    padding-left: 0.5rem;
  }

  .mirage-404__visual {
    height: 10rem;
  }

  .mirage-404__actions {
    width: 100%;
  }

  .markdown-body .mirage-404__action {
    width: min(100%, 18rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .mirage-motion-ready .mirage-reveal {
    opacity: 1;
    transform: none;
  }

  .mirage-gutter-canvas.is-visible {
    opacity: 0.72;
    transition: none;
  }
}