@charset "UTF-8";
:root {
  color-scheme: light;
  --oka-night: #191225;
  --oka-cream: #f2eadc;
  --oka-paper: #faf7f0;
  --oka-brass: #c6a56a;
  --oka-rust: #a85e4b;
  --oka-ink: #29252c;
  --oka-muted: #716b71;
  --oka-rule: #d9d1c5;
  font-family: "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--oka-paper);
}

body {
  margin: 0;
  color: var(--oka-ink);
  background: var(--oka-paper);
  line-height: 1.8;
}

.b35-brand,
.b35-navigation,
.b35-footer,
main {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
}

.b35-brand {
  padding: 27px 0 19px;
  color: var(--oka-night);
  font-family: Georgia, "Noto Serif CJK SC", serif;
  font-size: 1.42rem;
  letter-spacing: .14em;
}

.b35-brand a {
  color: inherit;
  text-decoration: none;
}

.b35-navigation {
  display: flex;
  gap: 11px 21px;
  overflow-x: auto;
  padding: 13px 0 16px;
  border-top: 1px solid var(--oka-rule);
  border-bottom: 1px solid var(--oka-rule);
  white-space: nowrap;
}

.b35-navigation a,
.b35-footer a {
  color: #6f4b3f;
  text-underline-offset: 4px;
}

main {
  padding: 32px 0 80px;
}

.oka-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) 128px;
  gap: 30px;
  align-items: center;
  min-height: 360px;
  padding: clamp(30px, 6vw, 70px);
  color: var(--oka-cream);
  background: var(--oka-night);
  overflow: hidden;
}

.oka-hero::after {
  position: absolute;
  right: 19%;
  bottom: 0;
  width: 1px;
  height: 60%;
  background: rgba(198, 165, 106, .55);
  content: "";
}

.oka-hero h1,
.oka-inner-head h1 {
  margin: 0;
  font-family: Georgia, "Noto Serif CJK SC", serif;
  font-weight: 500;
  line-height: 1.36;
}

.oka-hero h1 {
  max-width: 22ch;
  font-size: clamp(1.8rem, 4vw, 3.05rem);
}

.oka-hero-intro {
  max-width: 78ch;
  margin: 22px 0 18px;
  color: #eee5d7;
  font-size: 1.04rem;
}

.oka-hero h2 {
  margin: 0;
  color: var(--oka-brass);
  font-size: .97rem;
  font-weight: 500;
}

.oka-hero-sign {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 128px;
  height: 128px;
  margin: 0;
  border: 1px solid rgba(198, 165, 106, .55);
  border-radius: 50%;
}

.oka-image {
  display: block;
  max-width: 128px;
  height: auto;
  object-fit: contain;
}

.oka-hero-image {
  width: 78px;
  border-radius: 50%;
}

.oka-hero-markers {
  position: absolute;
  right: 27px;
  bottom: 24px;
  display: flex;
  gap: 17px;
  color: #cfc4b4;
  font-size: .78rem;
  letter-spacing: .14em;
}

.oka-section {
  margin-top: clamp(48px, 7vw, 88px);
}

.oka-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 22px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--oka-rule);
}

.oka-section-head h2 {
  margin: 0;
  color: var(--oka-night);
  font-family: Georgia, "Noto Serif CJK SC", serif;
  font-size: clamp(1.35rem, 2.1vw, 1.82rem);
  font-weight: 500;
}

.oka-text-card,
.oka-community-entry,
.oka-about-main,
.oka-about-side,
.oka-data-quiet,
.oka-data-highlight,
.oka-chinese-main,
.oka-chinese-inset,
.oka-mobile-lead,
.oka-mobile-secondary {
  padding: 25px 27px;
  background: #fff;
}

.oka-text-card h3,
.oka-community-entry h3,
.oka-about-main h2,
.oka-about-side h2,
.oka-data-quiet h3,
.oka-data-highlight h3,
.oka-chinese-main h3,
.oka-chinese-inset h3,
.oka-mobile-lead h3,
.oka-mobile-secondary h3 {
  margin: 0 0 12px;
  color: var(--oka-night);
  font-family: Georgia, "Noto Serif CJK SC", serif;
  font-size: 1.18rem;
  font-weight: 500;
}

.oka-text-card p,
.oka-community-entry p,
.oka-about-main p,
.oka-about-side p,
.oka-data-quiet p,
.oka-data-highlight p,
.oka-chinese-main p,
.oka-chinese-inset p,
.oka-mobile-lead p,
.oka-mobile-secondary p {
  margin: 0;
}

.oka-card-image {
  float: right;
  margin: 2px 0 11px 17px;
}

.oka-card-image .oka-image {
  width: 62px;
}

.oka-intro-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 185px;
  gap: 20px;
  align-items: stretch;
}

.oka-intro-card {
  min-height: 220px;
  border-left: 4px solid var(--oka-brass);
}

.oka-intro-stems {
  display: grid;
  align-content: space-around;
  padding: 20px 0 20px 24px;
  border-left: 1px solid var(--oka-rule);
  color: var(--oka-muted);
}

.oka-intro-stems p {
  margin: 0;
}

.oka-story-panel {
  max-width: 900px;
  margin-left: auto;
  color: var(--oka-cream);
  background: #30243a;
}

.oka-story-card {
  color: var(--oka-ink);
  background: #f7f1e8;
}

.oka-advantage-weave {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(210px, .65fr);
  gap: 23px;
  align-items: stretch;
}

.oka-advantage-card {
  border: 1px solid var(--oka-rule);
  border-top: 4px solid var(--oka-rust);
}

.oka-advantage-terms {
  display: grid;
  align-content: center;
  gap: 12px;
  padding: 23px;
  color: var(--oka-night);
  background: var(--oka-cream);
}

.oka-advantage-terms p {
  margin: 0;
  padding-bottom: 9px;
  border-bottom: 1px solid #d9c9ab;
}

.oka-community-row {
  display: grid;
  grid-template-columns: 1fr 1.12fr .9fr;
  gap: 15px;
  align-items: end;
}

.oka-community-entry {
  border-top: 2px solid var(--oka-brass);
  background: #fff;
}

.oka-community-entry:nth-child(2) {
  align-self: center;
  background: #f2eadc;
}

.oka-matrix-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr);
  gap: 32px;
  align-items: center;
  padding: 27px 32px;
  background: #f2eadc;
}

.oka-matrix-essay {
  padding: 0;
  background: transparent;
}

.oka-matrix-keys {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 20px;
  margin: 0;
}

.oka-matrix-keys div {
  padding: 10px 0;
  border-bottom: 1px solid #d8cbb6;
}

.oka-matrix-keys dt {
  color: #7d4f44;
  font-weight: 700;
}

.oka-matrix-keys dd {
  margin: 0;
  color: var(--oka-muted);
}

.oka-faq-rail {
  max-width: 980px;
  margin: 0 auto;
  border-top: 1px solid var(--oka-rule);
}

.oka-faq-entry {
  padding: 15px 18px;
  border-bottom: 1px solid var(--oka-rule);
}

.oka-faq-entry summary {
  color: var(--oka-night);
  font-weight: 650;
  cursor: pointer;
}

.oka-answer {
  max-width: 90ch;
  margin: 13px 0 3px;
}

.oka-insight-diptych {
  max-width: 920px;
  margin: 0 auto;
}

.oka-insight-card {
  border-left: 4px solid var(--oka-rust);
}

.oka-history-card {
  max-width: 820px;
  margin: 0 auto;
  padding: 30px 35px;
  border: 1px solid var(--oka-rule);
}

.oka-history-thread {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 28px;
  padding-top: 15px;
  color: #7d4f44;
  font-size: .9rem;
}

.oka-history-thread::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 1px;
  background: var(--oka-brass);
  content: "";
}

.oka-history-thread span {
  position: relative;
  padding-top: 5px;
}

.oka-history-thread span::before {
  position: absolute;
  top: -19px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--oka-rust);
  content: "";
}

.oka-news-matrix {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.oka-news-entry {
  min-width: 0;
  padding: 19px 21px;
  border: 1px solid var(--oka-rule);
  background: #fff;
}

.oka-news-entry:nth-child(4n + 1) {
  grid-column: span 2;
  background: #f2eadc;
}

.oka-news-entry time {
  color: var(--oka-muted);
  font-size: .84rem;
}

.oka-news-entry h3 {
  margin: 7px 0 12px;
  color: var(--oka-night);
  font-family: Georgia, "Noto Serif CJK SC", serif;
  font-size: 1.06rem;
  font-weight: 600;
}

.oka-news-entry a {
  display: inline-block;
  margin-top: 11px;
  color: #7d4f44;
}

.oka-news-art {
  float: right;
  margin: 0 0 11px 14px;
}

.oka-news-image {
  width: 58px;
}

.oka-news-body {
  margin: 0;
}

.oka-inner-head {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  align-items: end;
  margin-bottom: 32px;
  padding: 24px 0 17px;
  border-bottom: 1px solid var(--oka-rule);
}

.oka-inner-head h1 {
  color: var(--oka-night);
  font-size: clamp(1.65rem, 3.5vw, 2.5rem);
}

.oka-page-label {
  margin: 0;
  color: #806e5e;
}

.oka-about-columns {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 32px;
}

.oka-about-mark {
  position: sticky;
  top: 20px;
  display: grid;
  place-items: center;
  width: 128px;
  height: 128px;
  margin: 0;
  border-radius: 50%;
  background: var(--oka-cream);
}

.oka-about-image {
  width: 72px;
}

.oka-about-texts {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 18px;
  align-items: start;
}

.oka-about-main {
  grid-row: span 2;
  padding: 33px;
  border-left: 4px solid var(--oka-rust);
}

.oka-about-side {
  margin-top: 43px;
  background: #f2eadc;
}

.oka-news-reading {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  max-width: 900px;
  margin-left: auto;
}

.oka-news-reading .oka-news-entry {
  padding: 25px 30px;
  border-left: 4px solid var(--oka-brass);
  border-top: 0;
}

.oka-news-reading .oka-news-entry:nth-child(4n + 1) {
  grid-column: auto;
}

.oka-news-reading .oka-news-art {
  float: none;
  margin: 13px 0;
}

.oka-news-reading .oka-news-image {
  width: 74px;
}

.oka-data-comparison {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 18px;
  align-items: center;
}

.oka-data-quiet {
  border: 0;
  background: transparent;
}

.oka-data-highlight {
  border: 1px solid var(--oka-rule);
  border-bottom: 4px solid var(--oka-rust);
}

.oka-data-highlight .oka-card-image .oka-image {
  width: 59px;
}

.oka-data-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
  padding: 16px 20px;
  color: #f4eddf;
  background: var(--oka-night);
}

.oka-data-band span {
  text-align: center;
}

.oka-chinese-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(240px, .8fr);
  gap: 22px;
  align-items: start;
}

.oka-chinese-main {
  min-height: 260px;
  padding: 35px;
  border-top: 4px solid var(--oka-brass);
}

.oka-chinese-inset {
  margin-top: 54px;
  background: #f2eadc;
}

.oka-chinese-inset .oka-card-image .oka-image {
  width: 60px;
}

.oka-mobile-layout {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.oka-mobile-mark {
  display: grid;
  place-items: center;
  width: 128px;
  height: 150px;
  margin: 0;
  border: 1px solid var(--oka-brass);
  background: var(--oka-cream);
}

.oka-mobile-image {
  width: 75px;
}

.oka-mobile-copy {
  display: grid;
  gap: 16px;
}

.oka-mobile-lead {
  padding: 30px;
  border-left: 4px solid var(--oka-rust);
}

.oka-mobile-secondary {
  max-width: 82%;
  margin-left: auto;
  background: #f2eadc;
}

.b35-footer {
  padding: 25px 0 36px;
  border-top: 1px solid var(--oka-rule);
  color: var(--oka-muted);
  font-size: .9rem;
}

.b35-footer p {
  margin: 5px 0;
}

.b35-footer div {
  display: flex;
  gap: 18px;
  margin-top: 11px;
}

@media (max-width: 740px) {
  .b35-brand,
  .b35-navigation,
  .b35-footer,
  main {
    width: min(100% - 28px, 620px);
  }

  .oka-hero {
    grid-template-columns: minmax(0, 1fr);
    min-height: auto;
    padding: 26px 22px 64px;
  }

  .oka-hero-sign {
    display: none;
  }

  .oka-hero::after {
    right: 12%;
    height: 28%;
  }

  .oka-hero-markers {
    right: 16px;
    bottom: 18px;
    gap: 10px;
  }

  .oka-intro-layout,
  .oka-advantage-weave,
  .oka-matrix-layout,
  .oka-about-columns,
  .oka-about-texts,
  .oka-data-comparison,
  .oka-chinese-layout,
  .oka-mobile-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .oka-community-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .oka-community-entry:nth-child(2),
  .oka-chinese-inset,
  .oka-about-side {
    margin-top: 0;
  }

  .oka-news-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .oka-news-entry:nth-child(4n + 1) {
    grid-column: span 2;
  }

  .oka-inner-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .oka-about-mark {
    position: static;
  }

  .oka-about-main {
    grid-row: auto;
  }

  .oka-history-thread {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-top: 14px;
  }

  .oka-data-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .oka-mobile-secondary {
    max-width: 100%;
  }
}