* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overscroll-behavior: none; /* 彻底禁用任意方向的网页弹性拉伸回弹（橡皮筋）效果，防止漏出底色或背景图 */
  overflow-x: clip;
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0;
}

body.no-scroll {
  overflow: hidden;
}

@supports not (overflow: clip) {
  html,
  body {
    overflow-x: hidden;
  }
}

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

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

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 1000;
  padding: 10px 14px;
  background: var(--color-paper);
  color: var(--color-ink);
  transform: translateY(-160%);
  transition: transform .2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid currentColor;
  padding: 0 48px;
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.button--light {
  background: rgba(255, 255, 255, .92);
  color: var(--color-ink);
}

.button--light:hover,
.button--light:focus-visible {
  background: var(--color-ink);
  color: var(--color-paper);
}

.button--solid,
.button--dark {
  background: var(--color-paper);
  color: var(--color-ink);
}

.button--solid:hover,
.button--solid:focus-visible,
.button--dark:hover,
.button--dark:focus-visible {
  background: var(--color-mint);
  color: var(--color-night);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  border-bottom: 1px solid currentColor;
  color: var(--color-ink);
}

.text-link::after {
  content: "→";
  font-family: var(--font-mono);
}

.text-link--dark {
  color: var(--color-paper);
}

.icon-button {
  display: inline-flex;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid currentColor;
  background: rgba(255, 255, 255, .92);
  color: var(--color-ink);
  line-height: 1;
}

.icon-button:focus-visible,
.button:focus-visible,
.text-link:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-mint);
  outline-offset: 3px;
}

.eyebrow,
.kicker {
  margin: 0 0 22px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.section {
  padding: var(--section-y) var(--page-x);
}

/* 统一网页内容区最大宽度约束与居中对齐（Layout Grid），对标 Palantir 规范，防止在大屏下排版松散 */
.section-heading,
.diagram-panel,
.answer-steps,
.product-index,
.agent-grid,
.scenario-carousel,
.scenario-grid,
.news-grid,
.security-list,
.contact-grid,
.site-footer>div,
.menu-columns {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  box-sizing: border-box;
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: var(--section-heading-gap);
  max-width: 1200px;
}

.section-heading .kicker {
  margin-bottom: 0;
}

.section-heading h2 {
  margin: 0;
  max-width: 980px;
  font-size: clamp(36px, 4.5vw, 66px);
  font-weight: 400;
  line-height: 1.15;
  color: var(--color-ink);
}

.section-heading p:not(.kicker) {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.55;
}

.typewriter-title.is-typewriter-ready {
  text-rendering: optimizeLegibility;
}

.typewriter-title--hero.is-typewriter-ready .typewriter-char,
.typewriter-title--section.is-typewriter-ready .typewriter-char {
  display: inline-block;
  opacity: 0;
  transition: opacity .2s ease-out;
  will-change: opacity;
}

.typewriter-title--hero.is-typewriter-ready .typewriter-char {
  transition-duration: .24s;
}

.typewriter-title--section.is-typewriter-ready .typewriter-char {
  transition-duration: .22s;
}

.typewriter-title--hero.is-typewriter-visible .typewriter-char,
.typewriter-title--section.is-typewriter-visible .typewriter-char {
  opacity: 1;
}

.typewriter-title.is-typewriter-complete .typewriter-char {
  transition-delay: 0ms !important;
  will-change: auto;
}

.typewriter-word--nowrap {
  display: inline-block;
  white-space: nowrap;
}

.typewriter-title--product.is-typewriter-ready {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity .42s ease-out,
    transform .42s cubic-bezier(.2, .85, .25, 1);
  will-change: opacity, transform;
}

.typewriter-title--product.is-typewriter-visible {
  opacity: 1;
  transform: translateY(0);
}

.typewriter-title--product .typewriter-char {
  display: inline;
}

.typewriter-title .typewriter-char--space {
  width: .28em;
}

/* 桌面大屏上开启左右 2 列布局对齐 */
@media (min-width: 900px) {
  .section-heading {
    grid-template-columns: minmax(0, 1.35fr) minmax(320px, 400px);
    grid-template-areas:
      "kicker ."
      "title desc";
    gap: 0 clamp(40px, 7vw, 140px);
    align-items: start;
  }

  .section-heading .kicker {
    grid-area: kicker;
    margin-bottom: 12px;
  }

  .section-heading h2 {
    grid-area: title;
  }

  .section-heading p:not(.kicker) {
    grid-area: desc;
    margin: 0;
  }
}