/* 全局主题变量，便于后续替换品牌色 */
:root {
  --color-ink: #101014;
  --color-ink-soft: #292832;
  --color-paper: #f8f7f2;
  --color-muted: #706d78;
  --color-line: rgba(16, 16, 20, 0.14);
  --color-orange: #ff6a21;
  --color-green: #38f26b;
  --color-pink: #ff4fb8;
  --color-blue: #2764ff;
  --color-cyan: #2de7ff;
  --hero-bg: #ff6a21;
  --hero-accent: #2de7ff;
  --font-display: "Anton", Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
  --font-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 1180px;
  --header-height: 72px;
  --radius-card: 8px;
  --transition-carousel: 650ms cubic-bezier(0.2, 0.85, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.6;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

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

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

button {
  font: inherit;
}

.page-shell {
  min-height: 100vh;
  overflow: hidden;
}

.section-anchor {
  scroll-margin-top: calc(var(--header-height) + 18px);
}

.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  z-index: 50;
  display: flex;
  width: min(calc(100% - 32px), var(--max-width));
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: var(--radius-card);
  background: rgba(248, 247, 242, 0.78);
  box-shadow: 0 18px 60px rgba(16, 16, 20, 0.12);
  backdrop-filter: blur(18px);
  transform: translateX(-50%);
}

.site-header.is-scrolled {
  background: rgba(248, 247, 242, 0.92);
  box-shadow: 0 12px 40px rgba(16, 16, 20, 0.12);
}

.brand-mark,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.35rem;
  line-height: 1;
  letter-spacing: 0;
}

.brand-symbol {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 2px solid var(--color-ink);
  border-radius: 50%;
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: 1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}

.nav-links a {
  padding: 9px 10px;
  border-radius: 6px;
  color: rgba(16, 16, 20, 0.72);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1;
  transition: background-color 180ms ease, color 180ms ease;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: var(--color-ink);
  color: var(--color-paper);
  outline: none;
}

.hero {
  position: relative;
  min-height: 94svh;
  padding: calc(var(--header-height) + 66px) 24px 54px;
  background-color: var(--hero-bg);
  background-image:
    linear-gradient(140deg, rgba(255, 255, 255, 0.24) 0 14%, transparent 14% 100%),
    linear-gradient(24deg, rgba(16, 16, 20, 0.16) 0 18%, transparent 18% 100%);
  color: var(--color-ink);
  isolation: isolate;
  transition: background-color var(--transition-carousel);
}

.hero::after {
  /* 使用色块制造潮流海报感 */
  position: absolute;
  right: -90px;
  bottom: 8%;
  z-index: -1;
  width: 44%;
  height: 34%;
  border: 2px solid rgba(16, 16, 20, 0.18);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.34), rgba(255, 255, 255, 0.06));
  content: "";
  transform: rotate(-8deg);
}

.hero-noise,
.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-noise {
  z-index: -2;
  background-image: radial-gradient(rgba(255, 255, 255, 0.28) 1px, transparent 1px);
  background-size: 11px 11px;
  opacity: 0.36;
  mix-blend-mode: soft-light;
}

.hero-grid {
  z-index: -1;
  background-image:
    linear-gradient(rgba(16, 16, 20, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 16, 20, 0.12) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, transparent, #000 16%, #000 76%, transparent);
  opacity: 0.22;
}

.hero-word {
  position: absolute;
  top: 42%;
  left: 50%;
  z-index: 0;
  width: 100%;
  color: rgba(255, 255, 255, 0.22);
  font-family: var(--font-display);
  font-size: 8.5rem;
  line-height: 0.95;
  letter-spacing: 0;
  text-align: center;
  text-transform: uppercase;
  transform: translate(-50%, -50%);
  user-select: none;
  white-space: nowrap;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  width: min(100%, var(--max-width));
  min-height: 680px;
  margin: 0 auto;
  grid-template-columns: minmax(320px, 0.86fr) minmax(440px, 1.14fr);
  align-items: center;
  gap: 24px;
}

.hero-copy {
  max-width: 620px;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 18px;
  padding: 7px 10px;
  border: 1px solid rgba(16, 16, 20, 0.24);
  border-radius: 6px;
  background: rgba(248, 247, 242, 0.54);
  color: rgba(16, 16, 20, 0.78);
  font-size: 0.76rem;
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2 {
  margin: 0;
  font-family: var(--font-display);
  line-height: 0.98;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  font-size: 6rem;
}

.hero-lede {
  max-width: 640px;
  margin: 20px 0 0;
  font-family: var(--font-display);
  font-size: 3.25rem;
  line-height: 1.02;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-subtitle {
  max-width: 550px;
  margin: 20px 0 0;
  color: rgba(16, 16, 20, 0.78);
  font-size: 1.1rem;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 2px solid var(--color-ink);
  border-radius: 6px;
  font-size: 0.92rem;
  font-weight: 900;
  line-height: 1;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease, color 180ms ease;
}

.btn:hover,
.btn:focus-visible {
  outline: none;
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-ink);
  color: var(--color-paper);
  box-shadow: 7px 7px 0 rgba(255, 255, 255, 0.42);
}

.btn-secondary {
  background: rgba(248, 247, 242, 0.38);
  color: var(--color-ink);
}

.carousel-panel {
  position: relative;
  display: grid;
  min-height: 650px;
  align-items: center;
}

.toy-stage {
  position: relative;
  width: min(100%, 660px);
  height: 650px;
  margin: 0 auto;
}

.toy-character {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(76%, 520px);
  max-height: 92%;
  object-fit: contain;
  opacity: 0;
  filter: blur(4px);
  transform: translate(-50%, -50%) scale(0.45);
  transform-origin: 50% 70%;
  transition:
    opacity var(--transition-carousel),
    filter var(--transition-carousel),
    transform var(--transition-carousel);
  will-change: transform, opacity, filter;
}

.toy-character.is-active {
  z-index: 5;
  opacity: 1;
  filter: blur(0) drop-shadow(0 34px 34px rgba(16, 16, 20, 0.26));
  transform: translate(-50%, -48%) scale(1);
}

.toy-character.is-prev {
  z-index: 3;
  opacity: 0.58;
  filter: blur(2px) saturate(0.92);
  transform: translate(-112%, -42%) scale(0.58) rotate(-4deg);
}

.toy-character.is-next {
  z-index: 3;
  opacity: 0.58;
  filter: blur(2px) saturate(0.92);
  transform: translate(8%, -42%) scale(0.58) rotate(4deg);
}

.toy-character.is-back {
  z-index: 1;
  opacity: 0.24;
  filter: blur(5px) saturate(0.78);
  transform: translate(-50%, -62%) scale(0.42);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  z-index: 10;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 2px solid var(--color-ink);
  border-radius: 50%;
  background: rgba(248, 247, 242, 0.78);
  color: var(--color-ink);
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.carousel-btn span {
  display: block;
  margin-top: -3px;
  font-size: 2rem;
  line-height: 1;
}

.carousel-btn:hover,
.carousel-btn:focus-visible {
  background: var(--color-ink);
  color: var(--color-paper);
  outline: none;
  transform: translateY(-50%) scale(1.06);
}

.carousel-btn-prev {
  left: 2px;
  transform: translateY(-50%);
}

.carousel-btn-next {
  right: 2px;
  transform: translateY(-50%);
}

.carousel-dots {
  position: absolute;
  right: 50%;
  bottom: 16px;
  z-index: 12;
  display: flex;
  gap: 8px;
  transform: translateX(50%);
}

.carousel-dots button {
  width: 38px;
  height: 8px;
  padding: 0;
  border: 1px solid rgba(16, 16, 20, 0.4);
  border-radius: 999px;
  background: rgba(248, 247, 242, 0.62);
  cursor: pointer;
  transition: background-color 180ms ease, width 180ms ease;
}

.carousel-dots button.is-active {
  width: 58px;
  background: var(--color-ink);
}

.content-section,
.metrics-section {
  padding: 110px 24px;
}

.section-heading {
  width: min(100%, var(--max-width));
  margin: 0 auto 42px;
}

.section-heading h2 {
  max-width: 930px;
  font-size: 4rem;
}

.section-heading p:not(.eyebrow) {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--color-muted);
  font-size: 1.05rem;
  font-weight: 600;
}

.card-grid,
.tech-grid,
.application-grid,
.metrics-grid {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

.three-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.info-card,
.tech-card,
.application-grid article,
.metrics-grid article {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 18px 48px rgba(16, 16, 20, 0.08);
}

.info-card {
  min-height: 270px;
  padding: 26px;
}

.card-index {
  display: inline-flex;
  margin-bottom: 38px;
  color: var(--color-orange);
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
}

.info-card:nth-child(2) .card-index {
  color: var(--color-pink);
}

.info-card:nth-child(3) .card-index {
  color: var(--color-blue);
}

.info-card h3,
.tech-card h3,
.application-grid h3,
.workflow-list h3 {
  margin: 0;
  color: var(--color-ink);
  font-size: 1.2rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.info-card p,
.tech-card p,
.application-grid p,
.workflow-list p {
  margin: 14px 0 0;
  color: var(--color-muted);
  font-size: 0.96rem;
  font-weight: 600;
}

.workflow-band {
  background:
    linear-gradient(90deg, rgba(39, 100, 255, 0.1), transparent 42%),
    linear-gradient(135deg, var(--color-ink) 0 58%, #171721 58% 100%);
  color: var(--color-paper);
}

.workflow-band .eyebrow {
  border-color: rgba(248, 247, 242, 0.26);
  background: rgba(248, 247, 242, 0.1);
  color: rgba(248, 247, 242, 0.82);
}

.workflow-band .section-heading p:not(.eyebrow) {
  color: rgba(248, 247, 242, 0.66);
}

.workflow-list {
  display: grid;
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 0;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  list-style: none;
}

.workflow-list li {
  min-height: 280px;
  padding: 24px;
  border: 1px solid rgba(248, 247, 242, 0.12);
  background: rgba(248, 247, 242, 0.06);
}

.workflow-list span {
  display: inline-flex;
  margin-bottom: 64px;
  color: var(--hero-accent);
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1;
}

.workflow-list h3 {
  color: var(--color-paper);
}

.workflow-list p {
  color: rgba(248, 247, 242, 0.66);
}

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

.tech-card {
  position: relative;
  min-height: 250px;
  padding: 28px;
  overflow: hidden;
}

.tech-card::before {
  /* 用顶部色条区分技术模块 */
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--color-orange);
  content: "";
}

.tech-card:nth-child(2)::before {
  background: var(--color-green);
}

.tech-card:nth-child(3)::before {
  background: var(--color-pink);
}

.tech-card:nth-child(4)::before {
  background: var(--color-blue);
}

.metrics-section {
  background:
    linear-gradient(135deg, rgba(56, 242, 107, 0.16), transparent 34%),
    linear-gradient(315deg, rgba(255, 79, 184, 0.14), transparent 36%),
    var(--color-paper);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.metrics-grid article {
  min-height: 210px;
  padding: 24px;
}

.metrics-grid strong {
  display: block;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 4.2rem;
  line-height: 0.95;
  letter-spacing: 0;
}

.metrics-grid span {
  display: block;
  max-width: 210px;
  margin-top: 20px;
  color: var(--color-muted);
  font-size: 0.98rem;
  font-weight: 800;
  line-height: 1.35;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.application-grid article {
  min-height: 230px;
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.66)),
    var(--color-paper);
}

.application-grid article:nth-child(1) {
  border-top: 8px solid var(--color-orange);
}

.application-grid article:nth-child(2) {
  border-top: 8px solid var(--color-green);
}

.application-grid article:nth-child(3) {
  border-top: 8px solid var(--color-pink);
}

.application-grid article:nth-child(4) {
  border-top: 8px solid var(--color-blue);
}

.application-grid article:nth-child(5) {
  border-top: 8px solid var(--color-cyan);
}

.site-footer {
  display: flex;
  width: min(calc(100% - 48px), var(--max-width));
  margin: 0 auto 28px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px 0 0;
  border-top: 1px solid var(--color-line);
}

.site-footer p {
  margin: 10px 0 0;
  color: var(--color-muted);
  font-weight: 700;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.footer-links a {
  padding: 10px 12px;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  font-weight: 800;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-paper);
  outline: none;
}

@media (max-width: 1080px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .nav-links {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    padding-top: 148px;
  }

  .hero-content {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 760px;
  }

  .carousel-panel {
    min-height: 580px;
  }

  .toy-stage {
    height: 580px;
  }

  .hero-word {
    top: 58%;
    font-size: 6rem;
  }

  .workflow-list,
  .application-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 820px) {
  :root {
    --header-height: 118px;
  }

  .hero {
    min-height: 92svh;
    padding: 150px 18px 38px;
  }

  .brand-mark {
    font-size: 1.2rem;
  }

  .nav-links a {
    padding: 8px 9px;
    font-size: 0.8rem;
  }

  h1 {
    font-size: 4.2rem;
  }

  .hero-lede {
    font-size: 2.35rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    margin-top: 24px;
  }

  .btn {
    min-height: 46px;
    padding: 0 16px;
  }

  .carousel-panel {
    min-height: 460px;
  }

  .toy-stage {
    height: 460px;
  }

  .toy-character {
    width: min(86%, 390px);
  }

  .toy-character.is-prev {
    opacity: 0.38;
    transform: translate(-104%, -42%) scale(0.48) rotate(-4deg);
  }

  .toy-character.is-next {
    opacity: 0.38;
    transform: translate(4%, -42%) scale(0.48) rotate(4deg);
  }

  .toy-character.is-back {
    opacity: 0.2;
    transform: translate(-50%, -58%) scale(0.34);
  }

  .carousel-btn {
    width: 42px;
    height: 42px;
  }

  .hero-word {
    top: 62%;
    font-size: 4.5rem;
    white-space: normal;
  }

  .content-section,
  .metrics-section {
    padding: 78px 18px;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  .section-heading h2 {
    font-size: 2.65rem;
  }

  .three-columns,
  .tech-grid,
  .workflow-list,
  .metrics-grid,
  .application-grid {
    grid-template-columns: 1fr;
  }

  .info-card,
  .tech-card,
  .workflow-list li,
  .metrics-grid article,
  .application-grid article {
    min-height: auto;
  }

  .workflow-list span {
    margin-bottom: 36px;
  }

  .metrics-grid strong {
    font-size: 3.3rem;
  }

  .site-footer {
    width: calc(100% - 36px);
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .site-header {
    top: 10px;
    width: calc(100% - 20px);
    padding: 10px;
  }

  .hero {
    padding-top: 140px;
  }

  h1 {
    font-size: 3.35rem;
  }

  .hero-lede {
    font-size: 1.9rem;
  }

  .hero-subtitle {
    max-width: 360px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .carousel-panel {
    min-height: 390px;
  }

  .toy-stage {
    height: 390px;
  }

  .toy-character.is-prev,
  .toy-character.is-next {
    opacity: 0.18;
  }

  .carousel-btn-prev {
    left: -4px;
  }

  .carousel-btn-next {
    right: -4px;
  }

  .carousel-dots {
    bottom: 0;
  }

  .section-heading h2 {
    font-size: 2.25rem;
  }
}