:root {
  --contest-paper: #f5f1e8;
  --contest-surface: #fffdf8;
  --contest-ink: #1d1b19;
  --contest-muted: #6d645e;
  --contest-red: #7c2020;
  --contest-red-dark: #541417;
  --contest-line: rgba(72, 49, 43, 0.2);
  --contest-serif: "Noto Serif SC", "Songti SC", SimSun, serif;
  --contest-sans: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  --contest-mono: "JetBrains Mono", Consolas, monospace;
}

html {
  scroll-behavior: smooth;
}

body.native-contest {
  margin: 0;
  color: var(--contest-ink);
  background: var(--contest-paper);
  font-family: var(--contest-sans);
}

contest-document {
  display: block;
}

.native-contest .document-stage {
  overflow: clip;
}

.native-contest .doc-page {
  position: relative;
  scroll-margin-top: 0;
}

.native-contest .source-text {
  text-wrap: pretty;
}

.native-contest .page-heading {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: clamp(34px, 5vw, 70px);
}

.native-contest .page-heading span {
  color: var(--contest-red);
  font: 700 clamp(22px, 2.4vw, 34px)/1 var(--contest-mono);
}

.native-contest .page-heading h2 {
  margin: 0;
  font: 800 clamp(34px, 5vw, 68px)/1.08 var(--contest-sans);
  letter-spacing: -0.04em;
}

.native-contest .page-content {
  line-height: 1.86;
}

.native-contest .page-content p {
  margin: 0 0 0.85em;
}

.native-contest .page-content h3,
.native-contest .page-content h4,
.native-contest .page-content h5 {
  margin: 0;
  color: var(--contest-ink);
  line-height: 1.45;
}

.native-contest .page-content h3 {
  margin-bottom: 24px;
  font-size: clamp(24px, 2.7vw, 38px);
}

.native-contest .page-content h4 {
  margin: 28px 0 12px;
  font-size: clamp(19px, 1.7vw, 24px);
}

.native-contest .page-content h5 {
  margin: 22px 0 10px;
  font-size: 17px;
}

.native-contest .doc-section {
  min-width: 0;
}

.native-contest .circled-list,
.native-contest .criteria-list,
.native-contest .cn-number-list {
  display: grid;
  gap: 13px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.native-contest .criteria-list strong {
  color: var(--contest-red);
}

.native-contest .document-signature {
  max-width: 600px;
  margin: 52px 0 0 auto;
  text-align: right;
}

.native-contest .document-signature p {
  margin-bottom: 3px;
}

.native-contest .stamped-signature {
  position: relative;
  min-height: 158px;
  isolation: isolate;
}

.native-contest .protected-stamp {
  position: absolute;
  right: -10px;
  bottom: -24px;
  z-index: 1;
  display: block;
  width: clamp(128px, 15vw, 168px);
  aspect-ratio: 550 / 511;
  overflow: hidden;
  opacity: 0.82;
  mix-blend-mode: multiply;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.native-contest .protected-stamp img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
}

.native-contest .protected-stamp::after {
  position: absolute;
  inset: 0;
  content: "";
}

.native-contest a:not(.brand):not(.main-nav a):not(.contest-subnav a):not(.button) {
  color: var(--contest-red);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.native-contest .registration-detail-link {
  color: var(--contest-red) !important;
  font-weight: 700;
  text-decoration-line: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 4px;
}

.native-contest .registration-detail-link:hover {
  text-decoration-thickness: 2px;
}

.native-contest .registration-detail-link:focus-visible {
  outline: 2px solid var(--contest-red);
  outline-offset: 3px;
}
.native-contest .text-action {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 18px;
  margin-top: 12px;
  color: #fffdf8 !important;
  background: var(--contest-red);
  text-decoration: none;
}

.native-contest .text-action:active {
  transform: translateY(1px);
}

.native-contest .official-letter {
  max-width: 880px;
  margin: 0 auto;
  font-family: var(--contest-serif);
  font-size: clamp(16px, 1.35vw, 19px);
  text-align: justify;
}

.native-contest .official-letter .letter-authority {
  margin-bottom: 22px;
  color: var(--contest-red);
  font-size: clamp(26px, 3.3vw, 46px);
  font-weight: 700;
  text-align: center;
}

.native-contest .official-letter > h3 {
  max-width: 760px;
  margin: 0 auto 38px;
  padding-top: 24px;
  border-top: 2px solid var(--contest-red);
  font-size: clamp(20px, 2.2vw, 30px);
  text-align: center;
}

.native-contest .official-letter > p {
  text-indent: 2em;
}

.native-contest .official-letter > p:nth-of-type(1),
.native-contest .official-letter > p:nth-last-of-type(1),
.native-contest .official-letter .letter-salute {
  text-indent: 0;
}

.native-contest .official-letter .cn-number-list {
  margin: 4px 0 20px 2em;
}

.native-contest .timeline-list {
  margin: 0;
}

.native-contest .timeline-list > div {
  display: grid;
  grid-template-columns: minmax(170px, 0.55fr) 1fr;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--contest-line);
}

.native-contest .timeline-list dt {
  color: var(--contest-red);
  font-family: var(--contest-mono);
  font-weight: 700;
}

.native-contest .timeline-list dd {
  margin: 0;
  font-weight: 700;
}

.native-contest .contact-columns,
.native-contest .registration-channels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 24px;
  background: var(--contest-line);
  border: 1px solid var(--contest-line);
}

.native-contest .contact-columns > div,
.native-contest .registration-channels > section {
  padding: clamp(22px, 3vw, 38px);
  background: var(--contest-surface);
}

.native-contest .registration-channels h3 {
  font-size: clamp(19px, 1.7vw, 24px);
}

.native-contest .gallery-layout {
  min-height: 560px;
}

.native-contest .gallery-dynamic,
.native-contest .gallery-join {
  margin: 0 !important;
  font-family: var(--contest-serif);
  line-height: 1.1;
}

.native-contest .gallery-dynamic {
  font-size: clamp(48px, 8vw, 112px);
}

.native-contest .gallery-join {
  margin: 12px 0 60px !important;
  color: var(--contest-red);
  font-size: clamp(36px, 5vw, 72px);
}

.native-contest .gallery-empty {
  display: grid;
  min-height: 220px;
  align-content: center;
  padding: 34px;
  border: 1px dashed rgba(124, 32, 32, 0.45);
  text-align: center;
}

.native-contest .gallery-empty h3 {
  margin-bottom: 12px;
}

.native-contest .gallery-empty p {
  margin: 0;
  color: var(--contest-muted);
}

/* Version one: event guide */
.native-v1 .document-stage {
  background:
    radial-gradient(circle at 86% 3%, rgba(124, 32, 32, 0.09), transparent 24%),
    var(--contest-paper);
}

.native-v1 .doc-page:not(.cover-page) {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(74px, 9vw, 132px) 0;
  border-bottom: 1px solid var(--contest-line);
}

.native-v1 .doc-page:not(.cover-page)::after {
  position: absolute;
  top: 86px;
  right: 0;
  content: attr(data-page);
  color: rgba(124, 32, 32, 0.24);
  font: 800 clamp(52px, 8vw, 112px)/1 var(--contest-mono);
}

.native-v1 .cover-page {
  position: relative;
  display: grid;
  min-height: calc(100dvh - 120px);
  color: #fff8ec;
  background: var(--contest-red-dark);
  isolation: isolate;
}

.native-v1 .cover-art {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("red.jpg") right bottom / auto 420% no-repeat;
}

.native-v1 .cover-page::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: linear-gradient(90deg, rgba(49, 6, 9, 0.92) 0%, rgba(85, 10, 14, 0.7) 52%, rgba(49, 6, 9, 0.18) 100%);
}

.native-v1 .cover-content {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(240px, 1fr);
  grid-template-rows: auto auto auto 1fr auto;
  gap: 14px 52px;
  width: min(1240px, calc(100% - 64px));
  margin: auto;
  padding: 54px 0;
}

.native-v1 .cover-theme {
  margin: 0;
  color: #f2d7a3;
  font: 700 16px/1.2 var(--contest-sans);
  letter-spacing: 0.14em;
}

.native-v1 .cover-content h1 {
  max-width: 760px;
  margin: 0;
  font: 900 clamp(42px, 5.6vw, 76px)/1.08 var(--contest-sans);
  letter-spacing: -0.055em;
}

.native-v1 .cover-track {
  margin: 0;
  font: 750 clamp(25px, 3vw, 41px)/1.2 var(--contest-sans);
}

.native-v1 .cover-call {
  align-self: end;
  margin: 0;
  color: #f4ce75;
  font: 800 clamp(34px, 4.4vw, 62px)/1 var(--contest-sans);
  letter-spacing: 0.18em;
}

.native-v1 .cover-hosts {
  align-self: end;
  font-size: 15px;
}

.native-v1 .cover-hosts p {
  margin: 3px 0;
}

.native-v1 .cover-index {
  grid-column: 2;
  grid-row: 1 / 6;
  display: grid;
  align-content: center;
  border-left: 1px solid rgba(255, 248, 236, 0.34);
}

.native-v1 .cover-index a {
  display: block;
  padding: 15px 0 15px 34px;
  color: #fff8ec !important;
  border-bottom: 1px solid rgba(255, 248, 236, 0.2);
  font-weight: 700;
  text-decoration: none !important;
  transition: color 180ms ease, padding 180ms ease;
}

.native-v1 .cover-index a:hover,
.native-v1 .cover-index a:focus-visible {
  padding-left: 42px;
  color: #f4ce75 !important;
}

.native-v1 .page-content {
  font-size: 16px;
}

.native-v1 .awards-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 1px;
  background: var(--contest-line);
  border: 1px solid var(--contest-line);
}

.native-v1 .awards-layout > * {
  padding: clamp(28px, 4vw, 52px);
  background: rgba(255, 253, 248, 0.92);
}

.native-v1 .award-criteria,
.native-v1 .awards-layout .document-signature {
  grid-column: 1 / -1;
}

.native-v1 .awards-layout .document-signature {
  max-width: none;
  margin: 0;
}

.native-v1 .overview-layout {
  display: grid;
  grid-template-columns: 0.76fr 1.24fr;
  gap: clamp(32px, 6vw, 84px);
}

.native-v1 .overview-competition {
  align-self: start;
  padding: 34px;
  color: #fff8ec;
  background: var(--contest-red);
}

.native-v1 .overview-competition h3,
.native-v1 .overview-competition h4 {
  color: #fff8ec;
}

.native-v1 .schedule-block {
  grid-column: 1 / -1;
  padding-top: 44px;
}

.native-v1 .direction-intro {
  max-width: 850px;
  margin-bottom: 50px;
}

.native-v1 .direction-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1px;
  background: var(--contest-line);
  border: 1px solid var(--contest-line);
}

.native-v1 .direction-card {
  padding: clamp(28px, 4vw, 48px);
  background: rgba(255, 253, 248, 0.94);
}

.native-v1 .direction-card:first-child {
  grid-row: span 2;
  background: rgba(124, 32, 32, 0.08);
}

.native-v1 .submission-page .page-content {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 40px 64px;
}

.native-v1 .contact-block,
.native-v1 .rights-block {
  grid-column: 1 / -1;
}

.native-v1 .rights-block {
  padding: 42px;
  color: #fff8ec;
  background: var(--contest-red-dark);
}

.native-v1 .rights-block h3 {
  color: #fff8ec;
}

.native-v1 .requirements-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--contest-line);
  border: 1px solid var(--contest-line);
}

.native-v1 .requirements-layout > h3 {
  grid-column: 1 / -1;
  padding: 30px 36px;
  margin: 0;
  color: #fff8ec;
  background: var(--contest-red);
}

.native-v1 .requirement-card {
  padding: clamp(28px, 4vw, 44px);
  background: rgba(255, 253, 248, 0.94);
}

.native-v1 .requirement-wide {
  grid-column: 1 / -1;
}

.native-v1 .requirement-subgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 44px;
}

.native-v1 .sponsor-options-layout > h3,
.native-v1 .sponsor-levels-layout > h3 {
  font-size: clamp(32px, 4vw, 56px);
}

.native-v1 .sponsor-type-grid {
  display: grid;
  grid-template-columns: 0.62fr 1.38fr;
  gap: 1px;
  margin-top: 30px;
  background: var(--contest-line);
  border: 1px solid var(--contest-line);
}

.native-v1 .sponsor-type-grid > div {
  padding: clamp(26px, 3.6vw, 46px);
  background: rgba(255, 253, 248, 0.94);
}

.native-v1 .sponsor-resource {
  grid-column: 1 / -1;
  columns: 2;
  column-gap: 64px;
}

.native-v1 .sponsor-resource h5 {
  column-span: all;
}

.native-v1 .sponsor-returns {
  max-width: 880px;
  padding: 48px;
  margin: 1px 0 0 auto;
  color: #fff8ec;
  background: var(--contest-red-dark);
}

.native-v1 .sponsor-returns h4 {
  color: #fff8ec;
}

.native-v1 .sponsor-levels-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.native-v1 .sponsor-levels-layout > h3,
.native-v1 .sponsor-levels-layout > p {
  grid-column: 1 / -1;
}

.native-v1 .sponsor-level {
  grid-column: span 6;
  padding: clamp(26px, 3.4vw, 44px);
  border: 1px solid var(--contest-line);
  background: rgba(255, 253, 248, 0.9);
}

.native-v1 .sponsor-level:last-child {
  grid-column: 4 / span 6;
}

.native-v1 .level-chief {
  grid-column: span 7;
  color: #fff8ec;
  background: var(--contest-red-dark);
}

.native-v1 .level-chief h4 {
  color: #fff8ec;
}

.native-v1 .registration-page {
  min-height: 760px;
}

.native-v1 .placeholder-copy {
  margin: 0 0 38px !important;
  color: rgba(124, 32, 32, 0.48);
  font: 500 clamp(44px, 7vw, 90px)/1.1 var(--contest-serif);
}

/* Version two: formal reading */
.native-v2 .document-stage {
  padding: 38px 0 80px;
  background: #dfdcd5;
}

.native-v2 .doc-page {
  width: min(900px, calc(100% - 40px));
  min-height: 980px;
  padding: clamp(48px, 7vw, 82px);
  margin: 0 auto 34px;
  background: var(--contest-surface);
  border: 1px solid rgba(72, 49, 43, 0.22);
  box-shadow: 0 18px 50px rgba(61, 51, 46, 0.12);
}

.native-v2 .doc-page::before {
  position: absolute;
  right: 28px;
  bottom: 22px;
  content: attr(data-page);
  color: var(--contest-muted);
  font: 600 11px/1 var(--contest-mono);
}

.native-v2 .cover-page {
  display: grid;
  min-height: min(1160px, calc(100dvh - 150px));
  place-items: center;
  overflow: hidden;
  color: #fff8ec;
  background: var(--contest-red-dark);
  isolation: isolate;
}

.native-v2 .cover-art {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("red.jpg") right bottom / auto 420% no-repeat;
  transform: scale(1.08);
}

.native-v2 .cover-page::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: rgba(72, 5, 9, 0.72);
}

.native-v2 .cover-content {
  max-width: 760px;
  text-align: center;
}

.native-v2 .cover-theme {
  color: #f2d7a3;
  letter-spacing: 0.16em;
}

.native-v2 .cover-content h1 {
  margin: 30px 0 20px;
  font: 900 clamp(40px, 6vw, 68px)/1.13 var(--contest-sans);
  letter-spacing: -0.05em;
}

.native-v2 .cover-track {
  margin: 0;
  font: 750 clamp(23px, 3vw, 35px)/1.25 var(--contest-sans);
}

.native-v2 .cover-call {
  margin: 50px 0 44px;
  color: #f4ce75;
  font: 800 clamp(38px, 5vw, 56px)/1 var(--contest-sans);
  letter-spacing: 0.2em;
}

.native-v2 .cover-hosts p {
  margin: 3px 0;
}

.native-v2 .cover-index {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 50px;
  background: rgba(255, 248, 236, 0.3);
  border: 1px solid rgba(255, 248, 236, 0.3);
}

.native-v2 .cover-index a {
  padding: 12px 10px;
  color: #fff8ec !important;
  background: rgba(72, 5, 9, 0.6);
  text-decoration: none !important;
}

.native-v2 .page-heading {
  padding-bottom: 26px;
  border-bottom: 2px solid var(--contest-red);
}

.native-v2 .page-heading h2 {
  font-size: clamp(31px, 4vw, 48px);
}

.native-v2 .page-content {
  font-family: var(--contest-serif);
  font-size: 15px;
}

.native-v2 .page-content h3,
.native-v2 .page-content h4,
.native-v2 .page-content h5 {
  font-family: var(--contest-sans);
}

.native-v2 .doc-section + .doc-section {
  margin-top: 44px;
}

.native-v2 .awards-layout,
.native-v2 .overview-layout,
.native-v2 .direction-grid,
.native-v2 .requirements-layout,
.native-v2 .sponsor-levels-layout {
  display: block;
}

.native-v2 .award-criteria,
.native-v2 .schedule-block,
.native-v2 .direction-card,
.native-v2 .requirement-card,
.native-v2 .sponsor-level {
  padding-top: 32px;
  margin-top: 32px;
  border-top: 1px solid var(--contest-line);
}

.native-v2 .direction-card:first-child {
  margin-top: 0;
}

.native-v2 .contact-columns,
.native-v2 .registration-channels {
  grid-template-columns: 1fr;
}


.native-v2 .requirement-subgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 36px;
}

.native-v2 .sponsor-type-grid > div {
  padding: 26px 0;
  border-bottom: 1px solid var(--contest-line);
}


.native-v2 .placeholder-copy {
  color: rgba(124, 32, 32, 0.36);
  font: 500 clamp(38px, 6vw, 68px)/1 var(--contest-serif);
}

.native-v1 .v2-only,
.native-v2 .v1-only {
  display: none !important;
}

.native-v1 .cover-content h1,
.native-v2 .cover-content h1 {
  font-size: clamp(40px, 5vw, 68px);
}

.native-v1 .cover-track,
.native-v2 .cover-track {
  font-size: clamp(35px, 4.25vw, 56px);
}

.native-v1 .cover-index a,
.native-v2 .cover-index a {
  min-height: 70px;
  padding-top: 22px;
  padding-bottom: 22px;
  font-size: 20px;
}

.native-v2 .document-stage {
  padding-top: 0;
}

.native-v2 .cover-page {
  display: grid;
  width: 100%;
  min-height: calc(100dvh - 120px);
  padding: 0;
  margin: 0 auto 34px;
  place-items: stretch;
  overflow: hidden;
  border: 0;
  box-shadow: none;
}

.native-v2 .cover-page::before {
  display: none;
}

.native-v2 .cover-art {
  background: url("red.jpg") right bottom / auto 420% no-repeat;
  transform: none;
}

.native-v2 .cover-page::after {
  background: linear-gradient(90deg, rgba(49, 6, 9, 0.92) 0%, rgba(85, 10, 14, 0.7) 52%, rgba(49, 6, 9, 0.18) 100%);
}

.native-v2 .cover-content {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(240px, 1fr);
  grid-template-rows: auto auto auto 1fr auto;
  gap: 14px 52px;
  width: min(1240px, calc(100% - 64px));
  max-width: none;
  margin: auto;
  padding: 54px 0;
  text-align: left;
}

.native-v2 .cover-theme {
  margin: 0;
  letter-spacing: 0.14em;
}

.native-v2 .cover-content h1 {
  max-width: 760px;
  margin: 0;
  line-height: 1.08;
}

.native-v2 .cover-track {
  margin: 0;
  line-height: 1.2;
}

.native-v2 .cover-call {
  align-self: end;
  margin: 0;
}

.native-v2 .cover-hosts {
  align-self: end;
  font-size: 15px;
}

.native-v2 .cover-index {
  grid-column: 2;
  grid-row: 1 / 6;
  display: grid;
  grid-template-columns: 1fr;
  align-content: center;
  gap: 0;
  margin-top: 0;
  background: transparent;
  border: 0;
  border-left: 1px solid rgba(255, 248, 236, 0.34);
}

.native-v2 .cover-index a {
  padding-left: 38px;
  color: #fff8ec !important;
  background: transparent;
  border-bottom: 1px solid rgba(255, 248, 236, 0.2);
  font-weight: 700;
  transition: color 180ms ease, padding 180ms ease;
}

.native-v2 .cover-index a:hover,
.native-v2 .cover-index a:focus-visible {
  padding-left: 48px;
  color: #f4ce75 !important;
}

.native-v1 .cover-theme,
.native-v2 .cover-theme {
  font-size: 18px;
}

.native-v1 .cover-call,
.native-v2 .cover-call {
  font-size: clamp(40px, 4.8vw, 66px);
}

.native-v1 .cover-hosts,
.native-v2 .cover-hosts {
  font-size: 17px;
}

.native-v2 .confirmation-signature {
  position: relative;
  min-height: 158px;
  isolation: isolate;
}

.native-v2 .sponsor-types {
  display: block;
  margin-top: 24px;
  background: transparent;
  border: 0;
}

.native-v2 .sponsor-type-grid {
  margin-top: 0;
}

.native-v2 .sponsor-type-grid > div h5 {
  margin-top: 0;
}

.native-v2 .sponsor-type-grid > div:first-child {
  padding-top: 0;
}

.native-v2 .registration-page {
  min-height: 0;
}

.native-v2 .registration-submit-guide {
  margin-bottom: 44px;
}

.native-v2 .registration-submit-guide > h3 {
  margin-bottom: 24px;
  font-size: clamp(24px, 2.7vw, 38px);
}

.native-v2 .submission-methods {
  display: grid;
  gap: 18px;
}

.native-v2 .submission-method {
  display: grid;
  grid-template-columns: 106px minmax(0, 1fr);
  gap: 24px;
  padding: 26px 28px;
  border: 1px solid var(--contest-line);
  background: rgba(124, 32, 32, 0.035);
}

.native-v2 .submission-number {
  margin: 4px 0 0 !important;
  color: var(--contest-red);
  font: 800 23px/1 var(--contest-mono);
}

.native-v2 .submission-method h4 {
  margin: 0 0 12px;
  font-size: clamp(19px, 1.7vw, 24px);
}

.native-v2 .submission-destinations {
  display: grid;
  gap: 8px;
  padding: 15px 17px;
  margin: 16px 0;
  background: rgba(124, 32, 32, 0.055);
  border-left: 3px solid var(--contest-red);
}

.native-v2 .submission-destinations p {
  margin: 0;
  overflow-wrap: anywhere;
}

.native-v2 .submission-format {
  padding: 13px 15px;
  margin: 16px 0 0 !important;
  background: rgba(124, 32, 32, 0.08);
  font-weight: 700;
}

.native-v2 .registration-contact-guide {
  padding-top: 30px;
  border-top: 1px solid var(--contest-line);
}

.native-v2 .registration-contact-guide > h3 {
  margin: 0 0 24px;
  font-size: clamp(24px, 2.7vw, 38px);
}

.native-v2 .submission-alert {
  display: grid;
  gap: 8px;
  padding: 13px 15px;
  margin: 16px 0 0;
  color: var(--contest-ink);
  background: rgba(124, 32, 32, 0.08);
  font-weight: 700;
  line-height: 1.75;
}

.native-v2 .submission-alert p {
  margin: 0 !important;
  color: inherit;
  font-weight: inherit;
}

.native-v2 .registration-contact-list {
  display: grid;
  gap: 0;
  margin: 18px 0;
}

.native-v2 .registration-contact-list p {
  margin: 0;
}
.native-v2 .gallery-layout {
  min-height: 0;
}

.native-v2 .gallery-showcase {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(3, minmax(150px, 1fr));
  gap: 14px;
}

.native-v2 .gallery-slot {
  min-width: 0;
  margin: 0;
  border: 1px solid rgba(124, 32, 32, 0.28);
  background: rgba(124, 32, 32, 0.035);
}

.native-v2 .gallery-slot > div {
  width: 100%;
  height: 100%;
  min-height: 150px;
  background:
    linear-gradient(135deg, transparent 49.7%, rgba(124, 32, 32, 0.12) 50%, transparent 50.3%),
    linear-gradient(45deg, transparent 49.7%, rgba(124, 32, 32, 0.08) 50%, transparent 50.3%);
}

.native-v2 .gallery-slot-feature {
  grid-column: 1 / span 7;
  grid-row: 1 / span 2;
}

.native-v2 .gallery-slot-tall {
  grid-column: 8 / span 5;
  grid-row: 1 / span 2;
}

.native-v2 .gallery-slot-wide {
  grid-column: 1 / span 6;
}

.native-v2 .gallery-slot-small {
  grid-column: span 3;
}

@media (min-width: 1200px) {
  .native-v1 .cover-content,
  .native-v2 .cover-content {
    grid-template-columns: minmax(0, 840px) minmax(240px, 1fr);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .native-contest .doc-page:not(.cover-page) {
    opacity: 0.01;
    transform: translateY(24px);
    transition: opacity 520ms cubic-bezier(0.16, 1, 0.3, 1), transform 520ms cubic-bezier(0.16, 1, 0.3, 1);
  }

  .native-contest .doc-page.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .native-v1 .cover-content {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .native-v1 .cover-index {
    grid-column: 1;
    grid-row: auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid rgba(255, 248, 236, 0.34);
    border-left: 0;
  }

  .native-v1 .cover-index a {
    padding: 10px;
    text-align: center;
  }

  .native-v1 .overview-layout,
  .native-v1 .submission-page .page-content,
  .native-v1 .awards-layout {
    grid-template-columns: 1fr;
  }

  .native-v1 .award-criteria,
  .native-v1 .awards-layout .document-signature,
  .native-v1 .contact-block,
  .native-v1 .rights-block {
    grid-column: auto;
  }

  .native-v1 .schedule-block {
    grid-column: 1;
  }

  .native-v1 .sponsor-level,
  .native-v1 .level-chief,
  .native-v1 .sponsor-level:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 700px) {
  .native-contest .doc-page {
    scroll-margin-top: 0;
  }

  .native-contest .page-heading {
    gap: 12px;
    margin-bottom: 34px;
  }

  .native-contest .page-heading span {
    font-size: 18px;
  }

  .native-contest .page-heading h2 {
    font-size: 32px;
  }

  .native-contest .timeline-list > div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .native-contest .contact-columns,
  .native-contest .registration-channels,
  .native-v1 .direction-grid,
  .native-v1 .requirements-layout,
  .native-v1 .requirement-subgrid,
  .native-v2 .requirement-subgrid {
    grid-template-columns: 1fr;
  }

  .native-v1 .direction-card:first-child,
  .native-v1 .requirement-wide,
  .native-v1 .requirements-layout > h3 {
    grid-column: 1;
    grid-row: auto;
  }

  .native-v1 .sponsor-type-grid {
    grid-template-columns: 1fr;
  }

  .native-v1 .sponsor-resource {
    grid-column: 1;
    columns: 1;
  }

  .native-v1 .doc-page:not(.cover-page) {
    width: min(100% - 32px, 560px);
    padding: 58px 0;
  }

  .native-v1 .doc-page:not(.cover-page)::after {
    top: 62px;
    font-size: 46px;
  }

  .native-v1 .cover-page {
    min-height: calc(100dvh - 108px);
  }

  .native-v1 .cover-content {
    width: min(100% - 32px, 560px);
    padding: 38px 0;
  }

  .native-v1 .cover-content h1 {
    font-size: clamp(38px, 11vw, 52px);
  }

  .native-v1 .cover-index,
  .native-v2 .cover-index {
    grid-template-columns: repeat(2, 1fr);
  }

  .native-v1 .rights-block,
  .native-v1 .sponsor-returns,
  .native-v1 .overview-competition {
    padding: 26px;
  }

  .native-v2 .document-stage {
    padding-top: 18px;
  }

  .native-v2 .doc-page {
    width: calc(100% - 24px);
    min-height: 0;
    padding: 34px 24px 62px;
    margin-bottom: 18px;
  }

  .native-contest .official-letter {
    font-size: 15px;
    text-align: left;
  }

  .native-contest .official-letter > h3 br {
    display: none;
  }

  .native-contest .document-signature {
    margin-top: 38px;
  }

  .native-contest .stamped-signature {
    min-height: 140px;
  }

  .native-contest .protected-stamp {
    right: -6px;
    bottom: -16px;
    width: 132px;
  }
}

@media (max-width: 900px) {
  .native-v2 .cover-content {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .native-v2 .cover-index {
    grid-column: 1;
    grid-row: auto;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid rgba(255, 248, 236, 0.34);
    border-left: 0;
  }

  .native-v2 .cover-index a {
    padding: 14px 10px;
    text-align: center;
  }
}

@media (max-width: 700px) {
  .native-v2 .cover-page {
    width: 100%;
    min-height: calc(100dvh - 108px);
    padding: 0;
  }

  .native-v2 .cover-content {
    width: min(100% - 32px, 560px);
    padding: 38px 0;
  }

  .native-v1 .cover-content h1,
  .native-v2 .cover-content h1 {
    font-size: clamp(34px, 10vw, 48px);
  }

  .native-v1 .cover-track,
  .native-v2 .cover-track {
    font-size: clamp(31px, 8.8vw, 42px);
  }

  .native-v1 .cover-index a,
  .native-v2 .cover-index a {
    min-height: 58px;
    font-size: 17px;
  }

  .native-v2 .submission-method {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 22px 20px;
  }

  .native-v2 .gallery-showcase {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .native-v2 .gallery-slot-feature,
  .native-v2 .gallery-slot-tall,
  .native-v2 .gallery-slot-wide,
  .native-v2 .gallery-slot-small {
    grid-column: 1;
    grid-row: auto;
  }

  .native-v2 .gallery-slot-feature > div,
  .native-v2 .gallery-slot-wide > div,
  .native-v2 .gallery-slot-small > div {
    aspect-ratio: 16 / 10;
  }

  .native-v2 .gallery-slot-tall > div {
    aspect-ratio: 4 / 5;
  }
}


/* Even desktop rhythm for the formal-version hero */
@media (min-width: 901px) {
  .native-v2 .cover-content {
    grid-template-rows: repeat(5, auto);
    row-gap: 24px;
  }

  .native-v2 .cover-call,
  .native-v2 .cover-hosts {
    align-self: start;
  }

  .native-v2 .cover-index {
    min-height: 0;
    contain: size;
  }
}
/* Index-matched brand bar, complete mobile chapter navigation, and race timeline */
.native-contest .brand img {
  width: auto;
  height: 30px;
}

.native-contest .brand-copy {
  line-height: 1.15;
}

.native-contest .brand-copy strong {
  font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
  font-size: 20.5px;
  font-weight: 900;
  letter-spacing: 0.05em;
}

.native-contest .brand-copy small {
  display: block;
  margin-top: 2px;
  color: var(--contest-red);
  font-family: var(--contest-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.native-contest .race-timeline {
  position: relative;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(64px, 7vw, 96px) 0;
  border-bottom: 1px solid var(--contest-line);
}

.native-contest .race-timeline h2 {
  margin: 0 0 54px;
  font: 800 clamp(34px, 4.2vw, 56px)/1.08 var(--contest-sans);
  letter-spacing: -0.04em;
}

.native-contest .race-timeline ol {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  padding: 0;
  margin: 0;
  list-style: none;
}

.native-contest .race-timeline ol::before {
  position: absolute;
  top: 8px;
  right: 10%;
  left: 10%;
  height: 1px;
  content: "";
  background: rgba(124, 32, 32, 0.42);
}

.native-contest .race-timeline li {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 34px clamp(8px, 1.4vw, 20px) 0;
  text-align: center;
}

.native-contest .race-timeline li::before {
  position: absolute;
  top: 0;
  left: 50%;
  width: 17px;
  height: 17px;
  border: 4px solid var(--contest-paper);
  border-radius: 50%;
  content: "";
  background: var(--contest-red);
  box-shadow: 0 0 0 1px var(--contest-red);
  transform: translateX(-50%);
}

.native-contest .race-timeline time {
  color: var(--contest-red);
  font: 700 14px/1.4 var(--contest-mono);
}

.native-contest .race-timeline strong {
  font-size: clamp(16px, 1.45vw, 20px);
  line-height: 1.5;
}

.native-v2 .race-timeline {
  width: min(900px, calc(100% - 40px));
  margin-bottom: 24px;
  padding: clamp(48px, 7vw, 72px);
  border-bottom: 0;
  background: var(--contest-surface);
  box-shadow: 0 18px 50px rgba(61, 51, 46, 0.12);
}

.native-v2 .race-timeline li::before {
  border-color: var(--contest-surface);
}

@media (max-width: 700px) {
  html {
    scroll-padding-top: 154px;
  }

  .native-contest .header-inner {
    min-height: 72px;
  }

  .native-contest .brand {
    gap: 10px;
  }

  .native-contest .brand img {
    height: 30px;
  }

  .native-contest .brand-copy strong {
    font-size: 20.5px;
  }

  .native-contest .brand-copy small {
    font-size: 10px;
  }

  .native-contest .contest-subnav {
    overflow: visible;
  }

  .native-contest .contest-subnav-inner {
    width: 100%;
    min-width: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .native-contest .contest-subnav a {
    min-width: 0;
    padding: 10px 4px;
    border-right: 1px solid rgba(255, 255, 255, 0.12);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 13px;
    font-weight: 700;
    text-align: center;
  }

  .native-v1 .cover-page {
    min-height: calc(100dvh - 159px);
  }

  .native-v2 .cover-page {
    min-height: calc(100dvh - 178px);
  }

  .native-v1 .cover-content,
  .native-v2 .cover-content {
    justify-items: center;
    text-align: center;
  }

  .native-v1 .cover-theme,
  .native-v2 .cover-theme,
  .native-v1 .cover-content h1,
  .native-v2 .cover-content h1,
  .native-v1 .cover-track,
  .native-v2 .cover-track,
  .native-v1 .cover-call,
  .native-v2 .cover-call,
  .native-v1 .cover-hosts,
  .native-v2 .cover-hosts {
    width: 100%;
    text-align: center;
  }

  .native-contest .race-timeline,
  .native-v2 .race-timeline {
    width: calc(100% - 24px);
    padding: 46px 24px 50px;
  }

  .native-contest .race-timeline h2 {
    margin-bottom: 34px;
    font-size: 32px;
    text-align: center;
  }

  .native-contest .race-timeline ol {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
  }

  .native-contest .race-timeline ol::before {
    top: 8px;
    right: auto;
    bottom: 22px;
    left: 8px;
    width: 1px;
    height: auto;
  }

  .native-contest .race-timeline li {
    grid-template-columns: minmax(116px, 0.85fr) 1fr;
    gap: 16px;
    min-height: 76px;
    padding: 0 0 24px 34px;
    text-align: left;
  }

  .native-contest .race-timeline li::before {
    top: 0;
    left: 8px;
    transform: translateX(-50%);
  }

  .native-contest .race-timeline time,
  .native-contest .race-timeline strong {
    align-self: start;
  }
}
/* Paginated formal contest site */
.contest-home .document-stage,
.contest-subpage .document-stage {
  padding-top: 0;
}

.contest-home .cover-page {
  min-height: 100dvh;
  margin-bottom: 0;
}

.contest-home .cover-content {
  grid-template-columns: minmax(0, 840px);
  justify-content: start;
}

.contest-home .race-timeline {
  margin-bottom: 24px;
}

.home-portal,
.home-contact-summary,
.home-gallery {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto 24px;
  padding: clamp(46px, 6vw, 72px);
  background: var(--contest-surface);
  box-shadow: 0 18px 50px rgba(61, 51, 46, 0.12);
}

.portal-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  gap: 18px;
}

.portal-primary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.portal-secondary {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.portal-link {
  position: relative;
  display: flex;
  min-height: 154px;
  align-items: flex-end;
  justify-content: space-between;
  padding: 28px;
  color: var(--contest-ink) !important;
  border: 1px solid var(--contest-line);
  background: #f4f0e8;
  font: 800 clamp(22px, 2.4vw, 34px)/1.2 var(--contest-sans);
  text-decoration: none !important;
  transition: border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.portal-link::after {
  content: "进入";
  color: var(--contest-red);
  font: 700 12px/1 var(--contest-sans);
}

.portal-link-emphasis {
  min-height: 154px;
  color: #fff8ec !important;
  border-color: var(--contest-red);
  background: var(--contest-red);
}

.portal-link-emphasis::after {
  color: #f4ce75;
}

.portal-link:hover,
.portal-link:focus-visible {
  border-color: var(--contest-red);
  color: var(--contest-red) !important;
  transform: translateY(-2px);
}

.portal-link-emphasis:hover,
.portal-link-emphasis:focus-visible {
  color: #f4ce75 !important;
}

.portal-link:active {
  transform: translateY(1px);
}

.home-contact-summary > header,
.home-gallery > header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 38px;
}

.home-contact-summary h2,
.home-gallery h2 {
  margin: 0;
  font: 800 clamp(32px, 4.5vw, 58px)/1.08 var(--contest-sans);
  letter-spacing: -0.04em;
}

.home-contact-summary > header a,
.home-gallery > header a,
.subpage-return a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  color: #fff8ec !important;
  background: var(--contest-red);
  font-weight: 700;
  text-decoration: none !important;
}

.home-contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--contest-line);
  background: var(--contest-line);
}

.home-contact-grid section {
  padding: clamp(26px, 4vw, 42px);
  background: var(--contest-surface);
}

.home-contact-grid h3 {
  margin: 0 0 18px;
  font-size: 24px;
}

.home-contact-grid p {
  margin: 0 0 10px;
  line-height: 1.75;
}

.gallery-carousel-viewport {
  overflow: hidden;
}

.gallery-carousel-track {
  display: flex;
  gap: 18px;
}

.gallery-carousel-slide {
  flex: 0 0 min(72%, 760px);
  margin: 0;
}

.gallery-carousel-slide > div {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid rgba(124, 32, 32, 0.34);
  background:
    linear-gradient(135deg, transparent 49.7%, rgba(124, 32, 32, 0.16) 50%, transparent 50.3%),
    linear-gradient(45deg, transparent 49.7%, rgba(124, 32, 32, 0.12) 50%, transparent 50.3%),
    #ebe5db;
}

.gallery-carousel-slide > div::after {
  position: absolute;
  right: 18px;
  bottom: 16px;
  content: "作品图片占位";
  color: rgba(84, 20, 23, 0.7);
  font: 700 12px/1 var(--contest-sans);
  letter-spacing: 0.08em;
}

.gallery-carousel-controls {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  margin-top: 18px;
}

.gallery-carousel-controls p {
  margin: 0;
  text-align: center;
  font-family: var(--contest-mono);
}

.gallery-carousel-controls button {
  min-width: 92px;
  min-height: 44px;
  border: 1px solid var(--contest-red);
  color: var(--contest-red);
  background: transparent;
  font: 700 14px/1 var(--contest-sans);
  cursor: pointer;
}

.gallery-carousel-controls button:hover,
.gallery-carousel-controls button:focus-visible {
  color: #fff8ec;
  background: var(--contest-red);
}

.gallery-carousel-controls button:active {
  transform: translateY(1px);
}

.contest-subpage .document-stage {
  padding: 32px 0 80px;
}

.subpage-return {
  width: min(900px, calc(100% - 40px));
  margin: 0 auto 24px;
}

.subpage-return-bottom {
  margin-top: 24px;
  margin-bottom: 0;
  text-align: center;
}

.subpage-return-bottom a {
  min-width: 180px;
}

@media (max-width: 900px) {
  .contest-home .cover-content {
    grid-template-columns: 1fr;
  }

  .portal-grid,
  .home-contact-grid {
    grid-template-columns: 1fr;
  }

  .portal-secondary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .contest-home .cover-page {
    min-height: 100dvh;
  }

  .contest-home .cover-content {
    width: min(100% - 32px, 560px);
    padding: 44px 0;
  }

  .home-portal,
  .home-contact-summary,
  .home-gallery {
    width: calc(100% - 24px);
    padding: 38px 20px;
  }

  .portal-primary,
  .portal-secondary {
    grid-template-columns: 1fr;
  }

  .portal-link,
  .portal-link-emphasis {
    min-height: 112px;
    padding: 22px;
  }

  .home-contact-summary > header,
  .home-gallery > header {
    align-items: flex-start;
    flex-direction: column;
  }

  .gallery-carousel-slide {
    flex-basis: 88%;
  }

  .contest-subpage .document-stage {
    padding-top: 12px;
  }

  .subpage-return {
    width: calc(100% - 24px);
    margin-bottom: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .portal-link {
    transition: none;
  }
}
/* Compact mobile hero and document-image replacements */
.contest-subpage .page-heading {
  gap: 0;
}

.document-image {
  margin: 0;
}

.document-image img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--contest-line);
  background: #fff;
}

@media (max-width: 700px) {
  .contest-home .cover-page {
    min-height: min(680px, 78dvh);
  }

  .contest-home .cover-content {
    padding: 30px 0;
  }

  .image-replacement-page .page-content {
    margin-right: -8px;
    margin-left: -8px;
  }
}
/* Centered desktop hero, image lightbox, and registration cleanup */
@media (min-width: 901px) {
  .contest-home .cover-content {
    justify-content: center;
    justify-items: center;
    text-align: center;
  }

  .contest-home .cover-theme,
  .contest-home .cover-content h1,
  .contest-home .cover-track,
  .contest-home .cover-call,
  .contest-home .cover-hosts {
    width: 100%;
    text-align: center;
  }
}

.registration-without-codes .submission-method {
  grid-template-columns: 1fr;
}

.document-image-trigger {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  color: inherit;
  background: transparent;
  cursor: zoom-in;
}

.document-image-trigger:focus-visible {
  outline: 3px solid var(--contest-red);
  outline-offset: 4px;
}

.document-image-zoom-label {
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 9px 12px;
  color: #fff8ec;
  background: rgba(84, 20, 23, 0.92);
  font: 700 13px/1 var(--contest-sans);
  pointer-events: none;
}

.document-lightbox {
  width: min(96vw, 1500px);
  max-width: none;
  height: 94dvh;
  max-height: none;
  padding: 58px 24px 28px;
  overflow: auto;
  border: 1px solid rgba(255, 248, 236, 0.28);
  color: #fff8ec;
  background: #231718;
}

.document-lightbox::backdrop {
  background: rgba(22, 10, 11, 0.86);
  backdrop-filter: blur(8px);
}

.document-lightbox img {
  display: block;
  width: min(1400px, 100%);
  height: auto;
  margin: 0 auto;
  background: #fff;
}

.document-lightbox-close {
  position: sticky;
  top: -46px;
  z-index: 1;
  display: block;
  min-width: 88px;
  min-height: 42px;
  padding: 9px 16px;
  margin: -46px 0 16px auto;
  border: 1px solid rgba(255, 248, 236, 0.62);
  color: #fff8ec;
  background: #541417;
  font: 700 14px/1 var(--contest-sans);
  cursor: pointer;
}

.document-lightbox-close:hover,
.document-lightbox-close:focus-visible {
  color: #541417;
  background: #fff8ec;
}

html.lightbox-open {
  overflow: hidden;
}

@media (max-width: 700px) {
  .document-lightbox {
    width: calc(100vw - 16px);
    height: calc(100dvh - 16px);
    padding: 54px 8px 12px;
  }
}

@media print {
  .document-image-zoom-label,
  .document-lightbox {
    display: none !important;
  }
}@media print {
  .site-header,
  .contest-subnav,
  .site-footer {
    display: none !important;
  }

  .native-contest .document-stage {
    padding: 0;
    background: #fff;
  }

  .native-contest .doc-page {
    width: auto;
    min-height: 0;
    padding: 18mm;
    margin: 0;
    border: 0;
    box-shadow: none;
    break-after: page;
    opacity: 1 !important;
    transform: none !important;
  }

  .native-contest .protected-stamp {
    opacity: 0.88;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }
}