:root {
  color-scheme: light;
  --ink: #202124;
  --muted: #5f6368;
  --line: #dfe3e8;
  --paper: #ffffff;
  --soft: #f7f9fc;
  --mint: #e9f8ee;
  --blue: #2f6fed;
  --green: #1f8f4d;
  --red: #d83b2d;
  --amber: #f3a51d;
  --shadow: 0 18px 50px rgba(32, 33, 36, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 28px;
  color: #ffffff;
  background: #000000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
}

.brand,
.nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 9px;
  font-weight: 820;
}

.brand-logo {
  display: block;
  width: 44px;
  height: 36px;
  background-image: url("assets/lark_symbol.png");
  background-repeat: no-repeat;
  background-position: left center;
  background-size: auto 36px;
  flex: 0 0 auto;
}

.brand-word {
  color: #ffffff;
  font-size: 28px;
  line-height: 1;
  letter-spacing: 0;
}

.nav {
  gap: 22px;
  font-size: 14px;
  font-weight: 680;
}

.nav a {
  opacity: 0.82;
}

.nav a:hover {
  opacity: 1;
}

.hero {
  position: relative;
  min-height: min(88svh, 56.6vw);
  display: flex;
  align-items: flex-end;
  padding: 120px 7vw 58px;
  color: #ffffff;
  overflow: hidden;
  background-image: var(--hero-image);
  background-size: auto calc(100% + 28px);
  background-position: center -44px;
  background-repeat: no-repeat;
  background-color: #05070d;
}

.hero::after {
  content: none;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 54% 38% at 22% 68%, rgba(0, 0, 0, 0.94) 0%, rgba(0, 0, 0, 0.72) 42%, rgba(0, 0, 0, 0) 78%),
    linear-gradient(90deg, rgba(0, 0, 0, 0.18), rgba(0, 0, 0, 0.04) 42%, rgba(0, 0, 0, 0) 72%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0) 34%, rgba(0, 0, 0, 0.18));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(700px, 100%);
  max-width: 100%;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #ffd45b;
}

.hero-title {
  position: absolute;
  z-index: 1;
  top: clamp(124px, 9.8vw, 158px);
  left: clamp(52px, 5.7vw, 92px);
  margin: 0;
  max-width: min(760px, 50vw);
  color: #ffffff;
  font-family: Inter, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(52px, 5vw, 78px);
  line-height: 1.2;
  font-weight: 780;
  overflow-wrap: break-word;
  letter-spacing: 0;
  text-shadow: 0 6px 28px rgba(0, 0, 0, 0.58);
}

.hero-title span {
  display: block;
}

.hero-lede {
  max-width: 620px;
  margin: 0;
  color: rgba(255, 255, 255, 0.94);
  font-size: 18px;
  line-height: 1.82;
  text-shadow: 0 3px 14px rgba(0, 0, 0, 0.54);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 780;
  border: 1px solid transparent;
}

.button-primary {
  color: #ffffff;
  background: #2f6bff;
  box-shadow: 0 12px 30px rgba(47, 107, 255, 0.28);
}

.button-ghost {
  color: #ffffff;
  border-color: rgba(129, 183, 255, 0.54);
  background: rgba(255, 255, 255, 0.08);
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.hero-proof span {
  padding: 7px 10px;
  border-radius: 8px;
  background: rgba(13, 31, 67, 0.58);
  border: 1px solid rgba(129, 183, 255, 0.32);
  font-size: 13px;
  font-weight: 720;
}

.section {
  padding: 86px 0;
}

.section-white {
  background: #ffffff;
}

.section-inner {
  width: min(1160px, calc(100% - 44px));
  margin: 0 auto;
}

.section-inner.wide {
  width: min(1280px, calc(100% - 44px));
}

.section-heading {
  max-width: 860px;
  margin-bottom: 34px;
}

.section-heading.compact {
  max-width: 940px;
}

h2 {
  margin: 0;
  font-size: 40px;
  line-height: 1.16;
}

h3 {
  margin: 0;
  font-size: 23px;
  line-height: 1.3;
}

.section-heading p:not(.eyebrow),
.summary-panel p,
.case-card p,
.quote-source,
.footer {
  color: var(--muted);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 44px;
}

.metric-card {
  min-height: 124px;
  padding: 18px;
  border-radius: 8px;
  background: var(--soft);
  border: 1px solid var(--line);
}

.metric-card strong {
  display: block;
  color: var(--red);
  font-size: 34px;
  line-height: 1.1;
}

.metric-card span {
  display: block;
  margin-top: 10px;
  color: #3c4043;
  font-size: 14px;
  font-weight: 720;
}

.overview-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 22px;
  align-items: stretch;
}

.flow-figure,
.summary-panel {
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #ffffff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.flow-figure {
  margin: 0;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

.flow-figure img {
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: contain;
}

.summary-panel {
  padding: 30px;
}

.summary-panel .eyebrow {
  color: var(--blue);
}

.summary-panel p {
  margin: 16px 0 0;
}

.gallery-section {
  color: #ffffff;
  background: #202124;
}

.gallery-section .section-heading p {
  color: #8ee085;
}

.gallery-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.gallery-head .section-heading {
  margin-bottom: 24px;
}

.carousel-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 28px;
}

.carousel-button {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.carousel-button:hover {
  background: rgba(255, 255, 255, 0.18);
}

.carousel-shell {
  margin-inline: calc((100vw - min(1160px, calc(100vw - 44px))) / -2);
  overflow: hidden;
}

.gallery {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 0 calc((100vw - min(1160px, calc(100vw - 44px))) / 2) 8px;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: calc((100vw - min(1160px, calc(100vw - 44px))) / 2);
  scrollbar-width: none;
}

.gallery::-webkit-scrollbar {
  display: none;
}

.gallery figure {
  position: relative;
  flex: 0 0 min(78vw, 860px);
  height: 480px;
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  scroll-snap-align: center;
  background: #303438;
}

.gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-head {
  display: grid;
  grid-template-columns: minmax(280px, 460px) 1fr;
  gap: 24px;
  align-items: end;
  margin-bottom: 28px;
}

.tabs {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.tab {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #3c4043;
  background: #ffffff;
  font: inherit;
  font-size: 13px;
  font-weight: 720;
  cursor: pointer;
}

.tab[aria-selected="true"] {
  color: #ffffff;
  border-color: var(--blue);
  background: var(--blue);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.case-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #ffffff;
  box-shadow: 0 14px 38px rgba(32, 33, 36, 0.08);
}

.case-image {
  aspect-ratio: 16 / 10;
  background: var(--soft);
  overflow: hidden;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-image-contain {
  background: #f7f9fc;
}

.case-image-contain img {
  object-fit: contain;
  padding: 12px;
}

.brand-fill-card {
  display: flex;
  min-height: 100%;
  border: 0;
  border-radius: 8px;
  overflow: hidden;
  background: #02050d;
  box-shadow: 0 14px 38px rgba(32, 33, 36, 0.1);
}

.brand-fill-image {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 100%;
  object-fit: cover;
  object-position: center;
}

.case-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 20px;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  margin-bottom: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 9px;
  border-radius: 8px;
  color: var(--green);
  background: var(--mint);
  font-size: 12px;
  font-weight: 780;
}

.case-body h3 {
  font-size: 20px;
}

.tagline {
  color: #303438;
  font-weight: 720;
}

.highlight-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 2px 0 12px;
}

.highlight {
  padding: 4px 7px;
  border-radius: 8px;
  color: var(--red);
  background: #fff0ee;
  font-size: 12px;
  font-weight: 760;
}

.effect-list {
  display: grid;
  gap: 7px;
  margin: 2px 0 16px;
}

.effect-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 9px;
  align-items: start;
  padding: 9px 10px;
  border: 1px solid #e7ebf0;
  border-radius: 8px;
  background: #f7f9fc;
}

.effect-label {
  color: var(--blue);
  font-size: 12px;
  font-weight: 820;
  line-height: 1.45;
  white-space: nowrap;
}

.effect-text {
  color: #303438;
  font-size: 13px;
  line-height: 1.52;
  overflow-wrap: anywhere;
}

.quote {
  margin-top: auto;
  padding-top: 16px;
  color: #303438;
  font-size: 15px;
  font-weight: 720;
}

.quote::before {
  content: "“";
  color: var(--amber);
  font-size: 28px;
  line-height: 0;
  vertical-align: -8px;
}

.quote::after {
  content: "”";
  color: var(--amber);
}

.quote-section {
  padding: 94px 22px;
  color: #ffffff;
  background:
    linear-gradient(120deg, rgba(216, 59, 45, 0.92), rgba(47, 111, 237, 0.88)),
    url("assets/event_photo_04.jpg") center / cover;
}

.quote-inner {
  width: min(980px, 100%);
  margin: 0 auto;
}

.quote-section .eyebrow {
  color: #ffe58a;
}

blockquote {
  margin: 0;
  font-size: 36px;
  line-height: 1.35;
  font-weight: 820;
}

.quote-source {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-weight: 720;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 20px 28px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 520ms ease, transform 520ms ease;
}

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

@media (max-width: 1100px) {
  .metric-grid,
  .case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .overview-layout,
  .case-head {
    grid-template-columns: 1fr;
  }

  .tabs {
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  .topbar {
    height: auto;
    min-height: 62px;
    padding: 12px 16px;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 10px;
  }

  .brand-word {
    display: none;
  }

  .nav {
    max-width: calc(100vw - 78px);
    margin-left: auto;
    gap: 14px;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
  }

  .nav::-webkit-scrollbar {
    display: none;
  }

  .hero {
    min-height: 84svh;
    padding: 118px 22px 46px;
    background-position: 64% -36px;
  }

  .hero-title {
    top: 104px;
    left: 22px;
    max-width: min(340px, calc(100vw - 44px));
    font-size: 38px;
    line-height: 1.18;
    font-weight: 780;
  }

  .hero-lede {
    max-width: 100%;
    font-size: 15.5px;
    line-height: 1.75;
  }

  .section {
    padding: 62px 0;
  }

  h2 {
    font-size: 30px;
  }

  h3 {
    font-size: 21px;
  }

  .metric-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .gallery {
    padding-inline: 22px;
    scroll-padding-inline: 22px;
  }

  .gallery figure {
    flex-basis: min(84vw, 520px);
    height: 280px;
  }

  blockquote {
    font-size: 26px;
  }

  .footer {
    flex-direction: column;
  }
}