:root {
  --bg-deep: #e8e6ff;
  --bg-soft: #fbfaff;
  --text-main: #142c3b;
  --text-soft: #4a6a86;
  --brand-1: #2d6cdf;
  --brand-2: #6f5bff;
  --brand-3: #8b5cf6;
  --brand-warm: #ff8a5b;
  --line-soft: rgba(43, 122, 90, 0.18);
  --shadow-soft: 0 18px 55px rgba(22, 49, 71, 0.12);
  --shadow-card: 0 10px 30px rgba(36, 76, 112, 0.1);
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(45, 108, 223, 0.16), transparent 24%),
    radial-gradient(circle at 86% 12%, rgba(111, 91, 255, 0.18), transparent 22%),
    radial-gradient(circle at 78% 78%, rgba(139, 92, 246, 0.14), transparent 22%),
    linear-gradient(135deg, #f4f2ff 0%, #eef4ff 48%, #faf7ff 100%);
}

.app {
  height: 100svh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0)),
    transparent;
  color: var(--text-main);
  font-family: "Segoe UI Variable", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Noto Sans SC",
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.deck {
  position: relative;
  flex: 1;
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 10px 18px 5px;
  box-sizing: border-box;
}

.is-fullscreen .deck,
:fullscreen .deck,
:-webkit-full-screen .deck {
  padding-bottom: 10px;
}

.slide {
  width: min(1200px, calc(100vw - 32px));
  height: 100%;
  padding: clamp(22px, 4vw, 46px);
  box-sizing: border-box;
  border-radius: 26px;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.9), rgba(242, 250, 255, 0.84)),
    url("./assets/bg_pointcloud_4x3.svg") center center / cover no-repeat #ffffff;
  border: 1px solid rgba(151, 205, 228, 0.45);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  position: absolute;
  inset: auto;
  isolation: isolate;
  opacity: 0;
  transform: translateX(28px) scale(0.985);
  transition: opacity 220ms ease, transform 220ms ease;
  pointer-events: none;
  contain-intrinsic-size: 1200px 800px;
}

.slide[data-title="实测效果：三维浏览"] {
  overflow: hidden;
}

.slide[data-title="实测效果：问题发现"] {
  display: flex;
  flex-direction: column;
}

.slide[data-title="实测效果：问题发现"] .problem-top {
  flex: 1;
  min-height: 0;
}

.slide[data-title="实测效果：问题发现"] .problem-table {
  margin-top: 10px;
}

.slide[data-title="实测效果：问题发现"] .problem-table .table {
  margin-top: 0;
}

.slide[data-title="算法演示"] {
  display: flex;
  flex-direction: column;
}

.slide[data-title="算法演示"] .demo-stage {
  width: min(1040px, 100%);
  margin: 12px auto 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  min-height: 0;
}

.slide[data-title="算法演示"] .demo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  flex: 1;
  min-height: 0;
  align-items: stretch;
  grid-template-rows: 1fr;
}

.slide[data-title="算法演示"] .demo-card {
  position: relative;
  border-radius: 18px;
  padding: 16px 16px 14px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(116, 172, 224, 0.18);
  box-shadow: 0 12px 28px rgba(41, 89, 135, 0.1);
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 10px;
  overflow: hidden;
}

.slide[data-title="算法演示"] .demo-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, rgba(45, 108, 223, 0.9), rgba(95, 225, 255, 0.25));
}

.slide[data-title="算法演示"] .demo-card--green::before {
  background: linear-gradient(180deg, rgba(30, 156, 137, 0.9), rgba(160, 255, 185, 0.25));
}

.slide[data-title="算法演示"] .demo-card--purple::before {
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.9), rgba(190, 160, 255, 0.22));
}

.slide[data-title="算法演示"] .demo-card__title {
  padding-left: 10px;
  font-weight: 900;
  color: #173a46;
  font-size: 18px;
  line-height: 1.25;
}

.slide[data-title="算法演示"] .demo-card__desc {
  padding-left: 10px;
  color: rgba(23, 58, 70, 0.76);
  font-size: 15px;
  line-height: 1.55;
}

.slide[data-title="算法演示"] .demo-card__actions {
  display: flex;
  justify-content: flex-end;
  padding-left: 10px;
}

.btn--demo {
  font-size: 14px;
  padding: 10px 14px;
  border-radius: 14px;
}

.slide[data-title="算法演示"] .demo-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.slide[data-title="算法演示"] .demo-strip__item {
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(116, 172, 224, 0.16);
  box-shadow: 0 10px 22px rgba(41, 89, 135, 0.08);
  height: 150px;
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
}

.slide[data-title="算法演示"] .demo-strip__item::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 18% 22%, rgba(45, 108, 223, 0.18), transparent 55%);
  pointer-events: none;
}

.slide[data-title="算法演示"] .demo-strip__item--green::before {
  background: radial-gradient(circle at 18% 22%, rgba(30, 156, 137, 0.18), transparent 55%);
}

.slide[data-title="算法演示"] .demo-strip__item--purple::before {
  background: radial-gradient(circle at 18% 22%, rgba(139, 92, 246, 0.18), transparent 55%);
}

.slide[data-title="算法演示"] .demo-strip__item img {
  width: 106%;
  height: 106%;
  object-fit: cover;
  opacity: 0.92;
  filter: drop-shadow(0 10px 18px rgba(11, 16, 32, 0.12));
}

@media (max-width: 980px) {
  .slide[data-title="算法演示"] .demo-grid {
    grid-template-columns: 1fr;
  }

  .slide[data-title="算法演示"] .demo-strip {
    grid-template-columns: 1fr;
  }
}

.slide:not(.is-active):not(.is-leaving) {
  content-visibility: hidden;
}

.slide.is-active,
.slide.is-leaving {
  content-visibility: visible;
}

.slide::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    linear-gradient(135deg, rgba(45, 108, 223, 0.09), transparent 30%),
    radial-gradient(circle at right top, rgba(30, 156, 137, 0.18), transparent 26%),
    radial-gradient(circle at left bottom, rgba(139, 92, 246, 0.11), transparent 24%),
    radial-gradient(circle at 18% 84%, rgba(255, 138, 91, 0.12), transparent 30%),
    radial-gradient(circle at 62% 46%, rgba(95, 225, 255, 0.1), transparent 34%);
  pointer-events: none;
  z-index: -2;
  transform-origin: 50% 50%;
  animation: bgFloat 14s ease-in-out infinite;
}

.slide::after {
  content: "";
  position: absolute;
  top: 22px;
  right: 112px;
  width: 240px;
  height: 96px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 240 96'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' y1='0' x2='1' y2='1'%3E%3Cstop stop-color='%232d6cdf' stop-opacity='.65'/%3E%3Cstop offset='.55' stop-color='%231e9c89' stop-opacity='.5'/%3E%3Cstop offset='1' stop-color='%238b5cf6' stop-opacity='.45'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cpath d='M10 68C42 18 78 84 112 34s67 16 117-16' fill='none' stroke='url(%23g)' stroke-width='4' stroke-linecap='round'/%3E%3Ccircle cx='26' cy='62' r='5' fill='%232d6cdf' fill-opacity='.5'/%3E%3Ccircle cx='111' cy='34' r='6' fill='%231e9c89' fill-opacity='.48'/%3E%3Ccircle cx='187' cy='38' r='5' fill='%23ff8a5b' fill-opacity='.42'/%3E%3Ccircle cx='216' cy='18' r='7' fill='%238b5cf6' fill-opacity='.3'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  opacity: 0.7;
  pointer-events: none;
  z-index: -1;
  transform-origin: 50% 50%;
  animation: decoFloat 9s ease-in-out infinite;
}

.slide[data-title="封面"] {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.72), rgba(242, 250, 255, 0.78)),
    url("./assets/bg_pointcloud_4x3.svg") center center / cover no-repeat #ffffff;
}

.slide[data-title="目录"] ol {
  list-style: none;
  padding-left: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 14px;
  counter-reset: toc;
}

.slide[data-title="目录"] ol > li {
  counter-increment: toc;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(116, 172, 224, 0.22);
  box-shadow: 0 10px 26px rgba(48, 91, 133, 0.08);
  backdrop-filter: blur(10px);
}

.slide[data-title="目录"] ol > li::before {
  content: counter(toc);
  width: 38px;
  height: 38px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 900;
  color: #173a46;
  background: linear-gradient(135deg, rgba(45, 108, 223, 0.2), rgba(30, 156, 137, 0.16));
  border: 1px solid rgba(43, 122, 90, 0.18);
  box-shadow: 0 10px 18px rgba(45, 108, 223, 0.08);
}

.slide[data-title="目录"] b {
  color: #173a46;
}

.slide[data-title="结束"] {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.slide[data-title="结束"] .box {
  margin-top: 10px;
}

.slide[data-title="结束"] .lead {
  max-width: 44ch;
}

.slide.is-active {
  opacity: 1;
  transform: translateX(0) scale(1);
  pointer-events: auto;
}

.slide.is-prev {
  transform: translateX(-28px) scale(0.985);
}

h1 {
  margin: 10px 0 14px;
  max-width: 12ch;
  font-size: clamp(38px, 5.3vw, 64px);
  letter-spacing: 0.02em;
  line-height: 1.06;
  font-weight: 900;
  color: var(--text-main);
  text-wrap: balance;
  text-shadow: 0 8px 30px rgba(45, 108, 223, 0.12);
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(28px, 3.5vw, 42px);
  letter-spacing: 0.02em;
  line-height: 1.14;
  font-weight: 850;
  color: transparent;
  background: linear-gradient(135deg, #163650 0%, var(--brand-1) 42%, var(--brand-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  text-wrap: balance;
}

h3 {
  margin: 18px 0 10px;
  font-size: clamp(18px, 2.2vw, 24px);
  color: #246390;
  font-weight: 800;
}

p,
li {
  font-size: clamp(16px, 1.6vw, 20px);
  line-height: 1.65;
  color: var(--text-main);
}

ul,
ol {
  margin: 10px 0 0;
  padding-left: 22px;
}

li + li {
  margin-top: 10px;
}

.lead {
  max-width: 42em;
  font-size: clamp(18px, 2.1vw, 24px);
  color: var(--text-soft);
  font-weight: 500;
}

.meta {
  margin-top: 28px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 15px;
  color: #235d84;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(86, 149, 209, 0.22);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.08);
  backdrop-filter: blur(10px);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(43, 122, 90, 0.2);
  background: rgba(43, 122, 90, 0.08);
  font-size: 14px;
  color: #2b7a5a;
}

pre {
  margin: 16px 0 0;
  padding: 16px 16px;
  border-radius: 14px;
  background: #f0fbf5;
  border: 1px solid rgba(43, 122, 90, 0.15);
  overflow: auto;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

#global-logo {
  position: fixed;
  top: calc(10px + clamp(22px, 4vw, 46px));
  right: calc(((100vw - min(1200px, calc(100vw - 32px))) / 2) + clamp(22px, 4vw, 46px));
  z-index: 20;
  width: clamp(86px, 10vw, 150px);
  height: auto;
  opacity: 0.96;
  pointer-events: none;
  filter: drop-shadow(0 8px 20px rgba(11, 16, 32, 0.14));
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(45, 108, 223, 0.15);
  border-radius: 16px;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

#global-logo img {
  width: 100%;
  height: auto;
  display: block;
  mix-blend-mode: normal;
}

.brand-logo {
  width: clamp(92px, 14vw, 160px);
  margin: 18px auto 10px;
  filter: drop-shadow(0 14px 28px rgba(0, 0, 0, 0.45));
}

.grid {
  display: grid;
  gap: 16px;
}

.grid--2 {
  grid-template-columns: 1.15fr 0.85fr;
  align-items: start;
}

.media {
  margin-top: 14px;
}

.figure {
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(240, 249, 255, 0.8));
  border: 1px solid rgba(110, 173, 220, 0.22);
  padding: 12px;
  box-shadow: 0 14px 28px rgba(48, 91, 133, 0.08);
}

.caption {
  margin-top: 10px;
  font-size: 12px;
  color: #67879a;
}

.compact {
  margin-top: 10px;
  padding-left: 20px;
}

.compact li + li {
  margin-top: 8px;
}

.flow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 12px;
}

.box {
  position: relative;
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.94) 0%, rgba(244, 250, 255, 0.92) 100%);
  border: 1px solid rgba(116, 172, 224, 0.24);
  box-shadow: var(--shadow-card);
  padding: 18px 20px;
  backdrop-filter: blur(8px);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  right: 18px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--brand-1) 0%, var(--brand-2) 55%, var(--brand-3) 100%);
  opacity: 0.9;
}

.box:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(41, 89, 135, 0.14);
}

.box__k {
  font-family: "Segoe UI Variable", "PingFang SC", "Microsoft YaHei UI", sans-serif;
  font-size: 18px;
  color: #173a46;
  font-weight: 800;
  margin-bottom: 10px;
}

.box__v {
  font-size: 15px;
  line-height: 1.6;
  color: #45697a;
}

.box__v b {
  font-family: "Segoe UI Variable", "Helvetica Neue", Arial, sans-serif;
  color: var(--brand-2);
  font-size: 14px;
  letter-spacing: 0.06em;
  display: inline-block;
  margin-bottom: 4px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 14px;
  color: #246390;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid rgba(43, 122, 90, 0.2);
  background: #ffffff;
}

.table th,
.table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(43, 122, 90, 0.1);
  vertical-align: top;
  text-align: left;
  font-size: clamp(14px, 1.4vw, 18px);
  line-height: 1.45;
}

.table--nowrap th,
.table--nowrap td {
  white-space: nowrap;
}

.table th {
  background: rgba(43, 122, 90, 0.08);
  color: #1a4a38;
  font-weight: 600;
}

.table tr:last-child td {
  border-bottom: none;
}

.quote {
  margin: 14px 0 0;
  padding: 16px 18px;
  border-left: 4px solid #2d6cdf;
  background: linear-gradient(135deg, rgba(45, 108, 223, 0.08), rgba(30, 156, 137, 0.07));
  border-radius: 16px;
  color: #285d7f;
  font-size: clamp(16px, 1.7vw, 20px);
  box-shadow: 0 10px 24px rgba(45, 108, 223, 0.08);
}

.pill {
  list-style: none;
  padding-left: 0;
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.pill li {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(116, 172, 224, 0.22);
  box-shadow: 0 6px 14px rgba(48, 91, 133, 0.06);
}

hr {
  border: none;
  height: 1px;
  background: rgba(43, 122, 90, 0.15);
  margin: 18px 0;
}

.contact {
  margin-top: 14px;
  display: grid;
  place-items: center;
}

.contact__box {
  width: min(420px, 100%);
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: #ffffff;
  border: 1px dashed rgba(43, 122, 90, 0.3);
  color: #55a887;
  font-size: 16px;
}

.hud {
  position: sticky;
  bottom: 0;
  padding: 10px 14px 12px;
  box-sizing: border-box;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(247, 251, 255, 0.92) 40%, rgba(246, 250, 255, 1) 100%);
  backdrop-filter: blur(10px);
}

.is-fullscreen .hud #prevBtn,
.is-fullscreen .hud #nextBtn,
:fullscreen .hud #prevBtn,
:fullscreen .hud #nextBtn,
:-webkit-full-screen .hud #prevBtn,
:-webkit-full-screen .hud #nextBtn {
  display: none;
}

.is-fullscreen .hud .controls,
.is-fullscreen .hud .hint,
:fullscreen .hud .controls,
:fullscreen .hud .hint,
:-webkit-full-screen .hud .controls,
:-webkit-full-screen .hud .hint {
  display: none;
}

.progress {
  height: 4px;
  border-radius: 999px;
  background: rgba(30, 156, 137, 0.14);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #1e9c89 0%, #47c6b2 42%, #2d6cdf 100%);
  transition: width 180ms ease;
}

.controls {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  padding-top: 10px;
}

.btn {
  appearance: none;
  border: 1px solid rgba(104, 165, 214, 0.25);
  background: rgba(255, 255, 255, 0.82);
  color: #1f4d72;
  border-radius: 14px;
  padding: 10px 12px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 18px rgba(41, 89, 135, 0.08);
  font-weight: 700;
  backdrop-filter: blur(10px);
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease, border-color 140ms ease;
}

.btn:hover {
  border-color: rgba(111, 91, 255, 0.26);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(238, 240, 255, 0.96));
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(43, 88, 140, 0.12);
}

.btn:active {
  transform: translateY(1px);
}

.btn.is-tap,
.box.is-tap {
  animation: tapPulse 520ms ease;
}

.slide.is-enter .figure img,
.slide.is-enter .media img {
  animation: riseIn 520ms ease;
}

@keyframes decoFloat {
  0% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, -6px, 0);
  }
  100% {
    transform: translate3d(0, 0, 0);
  }
}

@keyframes bgFloat {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(-10px, 6px, 0) scale(1.02);
  }
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
}

@keyframes tapPulse {
  0% {
    transform: translateY(0) scale(1);
  }
  35% {
    transform: translateY(-1px) scale(1.02);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

@keyframes riseIn {
  0% {
    opacity: 0;
    transform: translateY(8px) scale(0.992);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.btn--ghost {
  background: transparent;
  box-shadow: none;
  border-color: transparent;
}

.btn--ghost:hover {
  background: rgba(43, 122, 90, 0.08);
  border-color: transparent;
}

.counter {
  min-width: 86px;
  text-align: center;
  font-size: 14px;
  color: #5d7f92;
  font-weight: 700;
}

.hint {
  text-align: center;
  padding-top: 6px;
  font-size: 12px;
  color: #89a6b7;
}

.slide[data-title="封面"]::after {
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20520%20132'%3E%3Cdefs%3E%3ClinearGradient%20id='wave'%20x1='0'%20y1='0'%20x2='1'%20y2='0'%3E%3Cstop%20stop-color='%231e9c89'%20stop-opacity='.78'/%3E%3Cstop%20offset='.55'%20stop-color='%235fe1c0'%20stop-opacity='.62'/%3E%3Cstop%20offset='1'%20stop-color='%232d6cdf'%20stop-opacity='.45'/%3E%3C/linearGradient%3E%3CradialGradient%20id='glow'%20cx='.5'%20cy='.5'%20r='1'%3E%3Cstop%20stop-color='%23ffd98a'%20stop-opacity='.72'/%3E%3Cstop%20offset='1'%20stop-color='%23ffd98a'%20stop-opacity='0'/%3E%3C/radialGradient%3E%3Cfilter%20id='soft'%20x='-30%25'%20y='-40%25'%20width='160%25'%20height='200%25'%3E%3CfeGaussianBlur%20stdDeviation='2.2'%20result='b'/%3E%3CfeMerge%3E%3CfeMergeNode%20in='b'/%3E%3CfeMergeNode%20in='SourceGraphic'/%3E%3C/feMerge%3E%3C/filter%3E%3C/defs%3E%3Cpath%20d='M16%2096C88%2016%20140%20130%20212%2058s126%2010%20184-28%20112%2032%20176-50'%20fill='none'%20stroke='url(%23wave)'%20stroke-width='5'%20stroke-linecap='round'%20filter='url(%23soft)'/%3E%3Cpath%20d='M22%20114C98%2072%20144%20128%20220%2084s118-16%20176-22%2098%2022%20152-40'%20fill='none'%20stroke='url(%23wave)'%20stroke-width='3'%20stroke-linecap='round'%20opacity='.58'/%3E%3Cg%20opacity='.88'%3E%3Cpath%20d='M468%20106c-18-18-20-52-6-78'%20fill='none'%20stroke='%231e9c89'%20stroke-opacity='.34'%20stroke-width='2.4'%20stroke-linecap='round'/%3E%3Ccircle%20cx='464'%20cy='28'%20r='7.2'%20fill='%23ffffff'%20fill-opacity='.28'/%3E%3Ccircle%20cx='464'%20cy='28'%20r='3.2'%20fill='%23ffffff'%20fill-opacity='.48'/%3E%3Cpath%20d='M464%2028%20l-26%20-18'%20stroke='%23ffffff'%20stroke-opacity='.35'%20stroke-width='1.2'%20stroke-linecap='round'/%3E%3Cpath%20d='M464%2028%20l-18%20-26'%20stroke='%23ffffff'%20stroke-opacity='.32'%20stroke-width='1.2'%20stroke-linecap='round'/%3E%3Cpath%20d='M464%2028%20l-6%20-30'%20stroke='%23ffffff'%20stroke-opacity='.28'%20stroke-width='1.2'%20stroke-linecap='round'/%3E%3Cpath%20d='M464%2028%20l14%20-28'%20stroke='%23ffffff'%20stroke-opacity='.24'%20stroke-width='1.2'%20stroke-linecap='round'/%3E%3Cpath%20d='M464%2028%20l26%20-18'%20stroke='%23ffffff'%20stroke-opacity='.22'%20stroke-width='1.2'%20stroke-linecap='round'/%3E%3Ccircle%20cx='438'%20cy='10'%20r='2.3'%20fill='%23ffffff'%20fill-opacity='.34'/%3E%3Ccircle%20cx='446'%20cy='2'%20r='2'%20fill='%23ffffff'%20fill-opacity='.28'/%3E%3Ccircle%20cx='458'%20cy='0'%20r='1.8'%20fill='%23ffffff'%20fill-opacity='.22'/%3E%3Ccircle%20cx='478'%20cy='0'%20r='1.6'%20fill='%23ffffff'%20fill-opacity='.18'/%3E%3C/g%3E%3Cg%20opacity='.9'%3E%3Ccircle%20cx='124'%20cy='54'%20r='10'%20fill='url(%23glow)'/%3E%3Ccircle%20cx='124'%20cy='54'%20r='2.2'%20fill='%23ffd98a'%20fill-opacity='.46'/%3E%3Ccircle%20cx='206'%20cy='44'%20r='12'%20fill='url(%23glow)'/%3E%3Ccircle%20cx='206'%20cy='44'%20r='2.4'%20fill='%23ffd98a'%20fill-opacity='.44'/%3E%3Ccircle%20cx='342'%20cy='66'%20r='9'%20fill='url(%23glow)'/%3E%3Ccircle%20cx='342'%20cy='66'%20r='2.1'%20fill='%23ffd98a'%20fill-opacity='.42'/%3E%3Ccircle%20cx='392'%20cy='40'%20r='11'%20fill='url(%23glow)'/%3E%3Ccircle%20cx='392'%20cy='40'%20r='2.3'%20fill='%23ffd98a'%20fill-opacity='.4'/%3E%3C/g%3E%3C/svg%3E");
  top: auto;
  right: auto;
  bottom: 76px;
  left: 50%;
  width: min(520px, 72%);
  height: 132px;
  transform: translateX(-50%);
  opacity: 0.95;
  background-size: contain;
  background-repeat: no-repeat;
}

.slide[data-title="封面"] {
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", ui-sans-serif, system-ui,
    -apple-system, "Segoe UI", Arial, sans-serif;
}

.slide[data-title="封面"] h1 {
  background: linear-gradient(135deg, #113a3c 0%, #1e9c89 48%, #2d6cdf 100%);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  text-shadow: none;
  letter-spacing: 0.03em;
}

.slide[data-title="封面"] .lead {
  color: rgba(17, 58, 60, 0.72);
  font-weight: 520;
}

.slide[data-title="封面"] .meta {
  color: rgba(17, 58, 60, 0.92);
  border-color: rgba(30, 156, 137, 0.22);
  box-shadow: 0 10px 25px rgba(30, 156, 137, 0.1);
}

.slide[data-title="封面"] .meta {
  font-weight: 700;
  letter-spacing: 0.08em;
}

@media (prefers-reduced-motion: reduce) {
  .slide,
  .progress__bar {
    transition: none;
  }
  .slide::before,
  .slide::after,
  .btn.is-tap,
  .box.is-tap,
  .slide.is-enter .figure img,
  .slide.is-enter .media img {
    animation: none;
  }
}

@media (max-width: 860px) {
  .slide::after {
    right: 88px;
    width: 180px;
    height: 72px;
  }
  .grid--2 {
    grid-template-columns: 1fr;
  }
  .flow {
    grid-template-columns: 1fr;
  }
  h1,
  h2 {
    max-width: none;
  }
}