/* Approved warm-white editorial direction. Marketing site only. */
:root { color-scheme: light; --topbar-h: 80px; }
body { background: var(--bg); }
::selection { background: #d1e4d9; color: var(--text); }
.topbar { background: rgba(247, 248, 244, .94); border-bottom-color: var(--line-soft); }
.topbar-brand { display: flex; align-items: center; }
.topbar-brand img { display: block; width: 148px; height: auto; }
.topbar-nav { margin-left: auto; margin-right: auto; }
.topbar-nav a { color: var(--text); }
.lang-switch button { min-height: 44px; border-radius: 0; border-bottom: 2px solid transparent; }
.lang-switch button[aria-pressed="true"] { background: transparent; border-bottom-color: var(--accent); }
.hero { border-bottom: 1px solid var(--line); padding-top: calc(var(--topbar-h) + 56px); padding-bottom: 32px; }
.slide { gap: clamp(28px, 4vw, 64px); min-height: 440px; }
.slide-title { text-wrap: balance; font-weight: 550; letter-spacing: -.045em; }
:lang(zh) .slide-title, :lang(zh) .section-title {
  font-family: "Songti SC", "Noto Serif CJK SC", "SimSun", serif;
  font-weight: 600; letter-spacing: -.035em; line-height: 1.3;
}
.slide-sub { line-height: 1.85; max-width: 36em; }
.keywords { gap: 0; margin-top: 34px; }
.keywords li { border: 0; border-radius: 0; padding: 0; font-size: 14px; text-transform: none; }
.keywords li + li::before { content: "·"; padding: 0 15px; color: var(--accent); }
.slide-visual { padding: 24px 0; }
.workbench { max-width: 620px; overflow: visible; }
.wb-links line { stroke: var(--accent); stroke-opacity: .65; stroke-width: 1.2; }
.wb-core, .wb-node rect { fill: url(#wb-surface); filter: url(#wb-shadow); stroke: #fff; stroke-width: 2; }
.wb-core-text { fill: var(--accent); font-size: 29px; letter-spacing: .04em; font-weight: 550; }
.wb-node text { fill: var(--text); font-size: 14px; }
.hero-controls { justify-content: flex-start; margin-top: 28px; gap: 20px; }
.hero-arrow { width: 44px; height: 44px; }
.hero-dots { gap: 6px; }
.hero-dots button { width: 46px; height: 44px; background: transparent; position: relative; }
.hero-dots button::after { content: ""; position: absolute; left: 0; right: 0; top: 21px; height: 2px; background: var(--line); }
.hero-dots button.is-active { background: transparent; }
.hero-dots button.is-active::after { background: var(--accent); }
.section { padding-top: 80px; padding-bottom: 88px; }
.section-title { text-wrap: balance; max-width: 26em; font-weight: 550; }
.section .wrap::before { display: block; margin-bottom: 24px; color: var(--accent); font-size: 13px; letter-spacing: .1em; }
#capabilities .wrap::before { content: "01"; }
#extensibility .wrap::before { content: "02"; }
#about .wrap::before { content: "03"; }
.cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 56px; counter-reset: capability; }
.card { position: relative; counter-increment: capability; display: grid; grid-template-columns: minmax(100px, .8fr) minmax(0, 1.3fr); gap: 20px; align-items: start; padding: 30px 0 30px 38px; border: 0; border-top: 1px solid var(--line); border-radius: 0; background: transparent; }
.card::before { content: counter(capability, decimal-leading-zero); position: absolute; left: 0; top: 32px; color: var(--accent); font-size: 12px; }
.card:hover { background: transparent; border-color: var(--accent); }
.card h3 { font-size: 18px; font-weight: 550; margin: 0; }
.card p { line-height: 1.8; }
.ext-layers { max-width: 1000px; margin-inline: auto; }
.layer-core { background: var(--panel); padding: 32px; box-shadow: 0 12px 30px #345f5009; }
.layer-core strong { color: var(--accent); font-size: 26px; letter-spacing: -.02em; }
.layer-plugins { border: 0; background: transparent; padding-inline: 0; }
.plugin-list li { background: var(--panel); padding-block: 18px; }
.entry-block { display: grid; grid-template-columns: 1fr 1.4fr; gap: 32px; }
.entry-block h3 { margin: 0; }
#about .wrap { display: grid; grid-template-columns: 1fr 1fr; column-gap: 70px; }
#about .wrap::before { grid-column: 1 / -1; }
#about .section-body { line-height: 1.9; }
#about .zh-only { grid-column: 2; margin-top: 10px; }
.section-cta { background: #edf2ec; border-top: 1px solid var(--line-soft); }
.btn { border-radius: 5px; min-height: 48px; }
.btn:active, .hero-arrow:active { transform: translateY(1px); }
.footer { background: var(--bg); }
.footer-brand img { opacity: 1; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
@media (min-width: 1600px) { .hero { padding-top: 160px; padding-bottom: 48px; } .slide { min-height: 480px; } }
@media (max-width: 1023px) {
  .hero { padding-top: calc(var(--topbar-h) + 36px); }
  .slide { grid-template-columns: 1fr 1fr; min-height: 400px; gap: 24px; }
  .slide-title { font-size: 38px; }
  .cards { gap: 0 32px; }
  .card { grid-template-columns: 1fr; gap: 10px; }
  #about .wrap { column-gap: 32px; }
}
@media (max-width: 767px) {
  :root { --topbar-h: 68px; }
  .topbar-brand img { width: 111px; }
  .topbar-nav { margin: 0; }
  .nav-toggle { min-height: 44px; }
  .slide { grid-template-columns: minmax(0, 1fr); gap: 12px; min-height: 0; }
  .slide-title { font-size: clamp(30px, 8vw, 44px); }
  .slide-sub { margin-bottom: 18px; }
  .keywords { margin-top: 18px; }
  .keywords li { font-size: 12px; }
  .keywords li + li::before { padding-inline: 8px; }
  .slide-visual { padding: 16px 0; }
  .workbench { max-width: 390px; }
  .hero-controls { margin-top: 16px; }
  .section { padding-block: 52px; }
  .cards { grid-template-columns: 1fr; margin-top: 28px; }
  .card { grid-template-columns: minmax(90px, .8fr) minmax(0, 1.3fr); gap: 18px; padding-block: 24px; }
  .card::before { top: 27px; }
  .card h3 { font-size: 16px; }
  .entry-block, #about .wrap { display: block; }
  .entry-block h3 { margin-bottom: 14px; }
  .plugin-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .plugin-list li { font-size: 12px; }
  .grow-plugins { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 359px) {
  .nav-toggle-label { display: none; }
  .card { grid-template-columns: 1fr; }
  .plugin-list { grid-template-columns: 1fr; }
}