:root {
  --color-paper: #fbfaf7;
  --color-surface: #f2efe8;
  --color-ink: #17242d;
  --color-muted: #64727a;
  --color-line: #ddd9d0;
  --color-teal: #256f70;
  --color-rust: #975237;
  --content-width: 1120px;
  --radius-large: 16px;
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background: var(--color-paper);
  color: var(--color-ink);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--color-paper);
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--color-teal);
  outline-offset: 4px;
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 18px;
  z-index: 30;
  min-height: 48px;
  padding: 11px 15px;
  display: inline-flex;
  align-items: center;
  color: #fff;
  background: var(--color-ink);
  border-radius: 8px;
}

.skip-link:focus {
  top: 18px;
}

.site-header {
  max-width: var(--content-width);
  min-height: 68px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-line);
}

.wordmark {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.22em;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  gap: 8px;
}

.site-header nav a {
  min-height: 48px;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  color: var(--color-muted);
  font-size: 0.78rem;
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--color-teal);
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 82px 28px 38px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 17px;
  color: var(--color-teal);
  font-size: 0.7rem;
  font-weight: 720;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(4.4rem, 11vw, 8.9rem);
  font-weight: 500;
  line-height: 0.85;
  letter-spacing: -0.065em;
}

.paper-title {
  max-width: 880px;
  margin: 30px auto 0;
  color: #34444d;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.35rem, 3vw, 2.05rem);
  line-height: 1.34;
  text-wrap: balance;
}

.title-nowrap {
  white-space: nowrap;
}

.publication-links {
  max-width: 1040px;
  margin: 30px auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.publication-link {
  min-height: 48px;
  padding: 10px 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  background: var(--color-ink);
  border: 1px solid var(--color-ink);
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 650;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease;
}

.publication-link svg {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  fill: currentcolor;
}

.publication-link small {
  display: inline-flex;
  align-items: center;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.publication-link small::before {
  margin-right: 7px;
  content: "·";
}

.publication-link:not(.is-coming-soon):hover {
  transform: translateY(-2px);
  background: var(--color-teal);
  border-color: var(--color-teal);
}

.publication-link.is-coming-soon {
  color: #58666e;
  background: #ece9e2;
  border-color: var(--color-line);
  cursor: default;
  pointer-events: none;
}

.preview-section {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 28px 62px;
  text-align: center;
}

.video-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #22343b;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-large);
  box-shadow: 0 24px 70px rgb(23 36 45 / 17%);
}

.video-frame > img,
.video-frame > iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
  object-fit: cover;
}

.video-coming-soon {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  color: #fff;
  background: rgb(16 29 34 / 47%);
}

.video-coming-soon span {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.video-coming-soon strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.9rem, 5vw, 3.8rem);
  font-weight: 500;
}

.tagline {
  margin: 40px auto 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.45rem, 3vw, 2.2rem);
  line-height: 1.45;
}

.tagline span {
  color: var(--color-teal);
}

footer {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 38px 28px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
}

footer > strong {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

footer > p {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  color: var(--color-muted);
  font-size: 0.75rem;
}

.contact-actions {
  display: flex;
  gap: 10px;
}

.contact-actions button,
.contact-actions a {
  min-height: 48px;
  padding: 9px 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-ink);
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 650;
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.contact-actions button:hover,
.contact-actions a:hover {
  color: var(--color-teal);
  border-color: var(--color-teal);
  transform: translateY(-2px);
}

.contact-actions svg {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  fill: currentcolor;
}

.contact-dialog {
  width: min(92vw, 420px);
  padding: 26px;
  color: var(--color-ink);
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-large);
}

.contact-dialog::backdrop {
  background: rgb(12 24 30 / 58%);
}

.contact-dialog h2 {
  margin: 0 0 16px;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
}

.email-address {
  margin: 0 0 16px;
  padding: 13px 15px;
  overflow-wrap: anywhere;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 10px;
  font-size: 0.95rem;
  user-select: all;
}

.copy-email {
  min-height: 44px;
  padding: 9px 15px;
  color: #fff;
  background: var(--color-ink);
  border: 1px solid var(--color-ink);
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 650;
}

.copy-email:hover {
  background: var(--color-teal);
  border-color: var(--color-teal);
}

.copy-status {
  min-height: 1.25em;
  margin: 10px 0 0;
  color: var(--color-muted);
  font-size: 0.78rem;
}

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

.dialog-close {
  min-width: 48px;
  min-height: 48px;
  float: right;
  color: var(--color-ink);
  background: transparent;
  border: 0;
  cursor: pointer;
  font-size: 1.6rem;
}

@media (max-width: 720px) {
  .site-header {
    padding-inline: 20px;
  }

  .site-header nav {
    gap: 0;
  }

  .hero {
    padding: 60px 20px 32px;
  }

  .desktop-title-break {
    display: none;
  }

  .preview-section {
    padding-inline: 16px;
  }

  footer {
    padding-inline: 20px;
    align-items: start;
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .site-header nav a {
    padding-inline: 7px;
  }

  .paper-title {
    font-size: 1.25rem;
  }
}

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

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