:root {
  --bg: #0b0d0f;
  --bg-soft: #16191c;
  --paper: #f5f6f4;
  --paper-2: #e8eceb;
  --ink: #101316;
  --ink-soft: #4d565c;
  --line: rgba(16, 19, 22, 0.14);
  --line-dark: rgba(255, 255, 255, 0.16);
  --white: #ffffff;
  --teal: #0b8f88;
  --orange: #e85f2c;
  --blue: #2367c8;
  --green: #21834d;
  --yellow: #d2a018;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.16);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

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

section[id] {
  scroll-margin-top: 86px;
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-140%);
  background: var(--white);
  color: var(--ink);
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  transition: transform 180ms ease;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nowrap {
  white-space: nowrap;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 13, 15, 0.88);
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
}

.header-inner {
  width: min(1180px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  background:
    linear-gradient(90deg, transparent 44%, var(--white) 44% 56%, transparent 56%),
    linear-gradient(0deg, transparent 44%, var(--white) 44% 56%, transparent 56%);
  transform: rotate(45deg);
}

.brand-copy {
  display: grid;
  gap: 0;
  min-width: 0;
}

.brand-copy strong {
  font-size: 1rem;
  line-height: 1.1;
  text-transform: uppercase;
}

.brand-copy span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.72rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.94rem;
}

.site-nav a {
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--white);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  background: transparent;
  color: var(--white);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span:not(.sr-only) {
  width: 18px;
  height: 2px;
  background: currentColor;
  display: block;
}

.hero {
  position: relative;
  min-height: min(700px, calc(100svh - 112px));
  background: #111 url("assets/images/hero-ai-pioneer.png") center / cover no-repeat;
  color: var(--white);
  display: grid;
  align-items: end;
  overflow: hidden;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.46);
}

.hero-content {
  position: relative;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 84px 0 56px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1.3;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: rgba(255, 255, 255, 0.82);
}

.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: 5.8rem;
  line-height: 0.98;
  font-weight: 900;
}

.hero-lede {
  max-width: 660px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.24rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-weight: 800;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--white);
  color: var(--ink);
}

.button-secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.08);
}

.hero-meta {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  max-width: 900px;
}

.hero-meta div {
  padding: 18px 24px 0 0;
}

.hero-meta span {
  display: block;
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.82rem;
}

.hero-meta strong {
  display: block;
  margin-top: 4px;
  font-size: 1rem;
}

.section {
  padding: 86px 0;
}

.section-light {
  background: var(--paper-2);
}

.section-ink {
  background: var(--bg);
  color: var(--white);
}

.intro-band {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 40px;
  align-items: start;
}

.intro-grid h2,
.section-head h2,
.resource-layout h2,
.subscribe-copy h2 {
  margin: 0;
  font-size: 2.35rem;
  line-height: 1.18;
}

.intro-grid p:last-child {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.section-head {
  margin-bottom: 34px;
}

.section-head.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(280px, 0.7fr);
  gap: 42px;
  align-items: end;
}

.section-head.split > p {
  margin: 0;
  color: var(--ink-soft);
}

.section-ink .section-head.split > p {
  color: rgba(255, 255, 255, 0.66);
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.focus-panel {
  min-height: 248px;
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 12px 28px rgba(16, 19, 22, 0.04);
}

.focus-panel span {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 900;
}

.focus-panel h3 {
  margin: 28px 0 10px;
  font-size: 1.18rem;
  line-height: 1.35;
}

.focus-panel p {
  margin: 0;
  color: var(--ink-soft);
}

.accent-teal span {
  background: var(--teal);
}

.accent-orange span {
  background: var(--orange);
}

.accent-blue span {
  background: var(--blue);
}

.accent-green span {
  background: var(--green);
}

.radar-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line-dark);
}

.radar-lane {
  min-height: 300px;
  padding: 24px;
  border-right: 1px solid var(--line-dark);
  display: flex;
  flex-direction: column;
}

.radar-lane:last-child {
  border-right: 0;
}

.radar-lane h3 {
  margin: 0 0 16px;
  font-size: 1.28rem;
}

.radar-lane p {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
}

.radar-lane span {
  margin-top: auto;
  color: var(--white);
  font-weight: 800;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.filter-chip {
  min-height: 38px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink-soft);
  font-weight: 800;
}

.filter-chip.is-active {
  background: var(--ink);
  color: var(--white);
}

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

.story-card {
  min-width: 0;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 14px 34px rgba(16, 19, 22, 0.06);
  display: flex;
  flex-direction: column;
}

.story-card.is-hidden {
  display: none;
}

.story-card.featured {
  grid-column: span 2;
}

.story-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--bg-soft);
}

.story-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.tag {
  margin: 0;
  color: var(--orange);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.story-content h3 {
  margin: 0;
  font-size: 1.32rem;
  line-height: 1.35;
}

.featured .story-content h3 {
  font-size: 1.65rem;
}

.story-content p:not(.tag) {
  margin: 0;
  color: var(--ink-soft);
}

.story-content dl {
  margin: auto 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.story-content dl div {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.story-content dt {
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.story-content dd {
  margin: 2px 0 0;
  font-weight: 900;
}

.signal-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.signal-item {
  padding: 24px;
  background: var(--paper);
  min-height: 236px;
}

.signal-item span,
.playbook-card span {
  color: var(--teal);
  font-weight: 900;
  font-size: 0.84rem;
}

.signal-item h3,
.playbook-card h3 {
  margin: 18px 0 10px;
  font-size: 1.25rem;
  line-height: 1.38;
}

.signal-item p,
.playbook-card p,
.resource-layout p {
  margin: 0;
  color: var(--ink-soft);
}

.playbook-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.playbook-card {
  min-height: 216px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.resource-section {
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.resource-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 54px;
  align-items: start;
}

.resource-layout p {
  margin-top: 18px;
}

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

.resource-list div {
  min-height: 132px;
  padding: 20px;
  background: var(--paper);
}

.resource-list strong {
  display: block;
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.resource-list span {
  color: var(--ink-soft);
}

.subscribe-section {
  background: var(--bg);
  color: var(--white);
}

.subscribe-section .section-kicker {
  color: rgba(255, 255, 255, 0.62);
}

.subscribe-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.92fr);
  gap: 46px;
  align-items: center;
}

.subscribe-copy p {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.05rem;
}

.contact-lines {
  display: grid;
  gap: 10px;
  margin-top: 26px;
}

.contact-lines span {
  padding-top: 10px;
  border-top: 1px solid var(--line-dark);
  color: rgba(255, 255, 255, 0.86);
}

.subscribe-asset {
  margin: 0;
  background: var(--white);
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  overflow: hidden;
}

.subscribe-asset img {
  width: 100%;
  max-height: 720px;
  object-fit: contain;
  background: var(--white);
}

.follow-strip {
  margin-top: 36px;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  overflow: hidden;
}

.follow-strip img {
  width: 100%;
  background: var(--bg);
}

.site-footer {
  background: #070809;
  color: rgba(255, 255, 255, 0.68);
  padding: 24px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.back-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: var(--ink);
  color: var(--white);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.back-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

@media (max-width: 1020px) {
  .hero h1 {
    font-size: 4.7rem;
  }

  .focus-grid,
  .radar-grid,
  .signal-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .radar-lane:nth-child(2) {
    border-right: 0;
  }

  .radar-lane:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line-dark);
  }

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

@media (max-width: 780px) {
  .container,
  .hero-content {
    width: min(100% - 28px, 680px);
  }

  .header-inner {
    min-height: 64px;
  }

  .brand-copy span {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    z-index: 60;
    left: 0;
    right: 0;
    top: 64px;
    display: grid;
    gap: 0;
    background: rgba(11, 13, 15, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 180ms ease, opacity 180ms ease;
  }

  .nav-open .site-nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    padding: 16px 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .hero {
    min-height: min(620px, calc(100svh - 96px));
    background-position: 58% center;
  }

  .hero-content {
    padding: 80px 0 34px;
  }

  .hero h1 {
    font-size: 3.25rem;
    line-height: 1.05;
  }

  .hero-lede {
    font-size: 1.05rem;
  }

  .hero-meta,
  .intro-grid,
  .section-head.split,
  .resource-layout,
  .subscribe-grid {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    gap: 12px;
  }

  .hero-meta div {
    padding: 12px 0 0;
  }

  .section {
    padding: 64px 0;
  }

  .intro-band {
    padding: 30px 0;
  }

  .intro-grid h2,
  .section-head h2,
  .resource-layout h2,
  .subscribe-copy h2 {
    font-size: 2rem;
  }

  .section-head.split {
    gap: 18px;
    align-items: start;
  }

  .filter-bar {
    justify-content: flex-start;
  }

  .focus-grid,
  .radar-grid,
  .story-grid,
  .signal-list,
  .playbook-grid,
  .resource-list {
    grid-template-columns: 1fr;
  }

  .radar-lane {
    min-height: 220px;
    border-right: 0;
    border-bottom: 1px solid var(--line-dark);
  }

  .radar-lane:last-child {
    border-bottom: 0;
  }

  .story-card.featured {
    grid-column: auto;
  }

  .featured .story-content h3 {
    font-size: 1.32rem;
  }

  .subscribe-grid {
    gap: 28px;
  }
}

@media (max-width: 480px) {
  .brand-copy strong {
    font-size: 0.95rem;
  }

  .hero {
    min-height: min(560px, calc(100svh - 88px));
  }

  .hero h1 {
    font-size: 2.62rem;
  }

  .hero-content {
    padding: 56px 0 28px;
  }

  .hero-meta {
    display: none;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .focus-panel,
  .playbook-card,
  .signal-item,
  .radar-lane,
  .story-content {
    padding: 18px;
  }

  .story-content dl {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}