:root {
  --paper: #f6f4ed;
  --paper-deep: #efede4;
  --ink: #171717;
  --muted: #8e8f94;
  --line: #dfddd3;
  --brown: #8b5639;
  --brown-soft: #b8785a;
  --green: #dbe2bd;
  --card: #fffdfa;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 72px;
  background: rgba(246, 244, 237, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand,
.site-nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
}

.brand-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  color: #fff;
  font-weight: 900;
  border-radius: 50%;
  background: linear-gradient(135deg, #5868ff 10%, #ff42bc 82%);
}

.site-nav {
  gap: 30px;
  font-size: 14px;
  color: #303033;
}

.nav-pill,
.nav-primary {
  padding: 10px 18px;
  border-radius: 999px;
}

.nav-pill {
  background: #fff;
  border: 1px solid var(--line);
}

.nav-primary {
  color: #fff;
  background: #171717;
}

.hero {
  min-height: 510px;
  background: #faf9f5;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.03fr 0.9fr;
  gap: 96px;
  width: min(1280px, calc(100% - 120px));
  margin: 0 auto;
  padding: 112px 0 78px;
  align-items: center;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  font-size: 60px;
  line-height: 1.18;
}

h2 {
  font-size: 48px;
  line-height: 1.25;
}

h3 {
  font-size: 30px;
  line-height: 1.25;
}

h4 {
  margin-top: 30px;
  color: var(--brown);
  font-size: 24px;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  letter-spacing: 0;
}

.hero-copy p {
  width: min(620px, 100%);
  margin-top: 18px;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 124px;
  height: 50px;
  padding: 0 24px;
  font-size: 16px;
  font-weight: 700;
  border-radius: 999px;
}

.button-dark {
  color: #fff;
  background: #171717;
}

.button-light {
  color: var(--brown);
  background: #fff;
  border: 1px solid #b99786;
}

.video-card {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 300px;
  overflow: hidden;
  background:
    radial-gradient(circle at 35% 30%, rgba(220, 232, 202, 0.8), transparent 42%),
    linear-gradient(135deg, #f7f4df, #fbf5e8);
  border: 1px solid #ebe8da;
  border-radius: 16px;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.04);
}

.video-logo {
  font-size: 28px;
  font-weight: 900;
}

.play-button {
  position: absolute;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  color: #fff;
  background: rgba(83, 83, 79, 0.42);
  border-radius: 50%;
  padding-left: 4px;
}

.video-caption {
  position: absolute;
  bottom: 112px;
  color: var(--brown);
  font-size: 16px;
}

.device-stage {
  position: relative;
  height: 575px;
  overflow: hidden;
  background: linear-gradient(#faf9f5 0 45px, var(--paper) 45px 100%);
}

.dot-field {
  position: absolute;
  inset: 150px 0 0;
  background-image: radial-gradient(rgba(155, 143, 122, 0.23) 1.2px, transparent 1.2px);
  background-size: 12px 12px;
  mask-image: linear-gradient(90deg, transparent, black 16%, black 84%, transparent);
}

.desktop-window {
  position: absolute;
  left: 50%;
  top: 92px;
  display: grid;
  grid-template-columns: 54px 224px 1fr;
  width: 960px;
  height: 415px;
  transform: translateX(-50%);
  overflow: hidden;
  background: #fff;
  border: 1px solid #dedbd1;
  border-radius: 18px;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.08);
}

.mini-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  padding-top: 26px;
  background: #fafafa;
  border-right: 1px solid #eceae3;
}

.side-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #d9d9d9;
}

.side-dot.active {
  background: linear-gradient(135deg, #5868ff, #ff42bc);
}

.mini-list {
  padding: 22px 18px;
  background: #fbfbfa;
  border-right: 1px solid #eceae3;
}

.mini-title {
  margin-bottom: 14px;
  color: #404044;
  font-weight: 700;
}

.mini-agent {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 9px;
  padding: 11px 8px;
  border-radius: 10px;
}

.mini-agent.active {
  background: #f1eee6;
}

.mini-agent i {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #e8d7ca;
}

.mini-agent span,
.mini-agent small {
  display: block;
}

.mini-agent span {
  color: #333;
  font-size: 13px;
  font-weight: 700;
}

.mini-agent small {
  margin-top: 4px;
  color: #96969a;
  font-size: 11px;
}

.mini-chat {
  padding: 26px 32px;
}

.chat-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 32px;
}

.chat-head span {
  color: #939397;
  font-size: 12px;
}

.bubble {
  width: 82%;
  margin: 12px 0;
  padding: 14px 18px;
  color: #555;
  background: #f1f1ef;
  border-radius: 11px;
}

.bubble.green {
  margin-left: 38px;
  background: #eef4e9;
}

.input-bar {
  margin-top: 32px;
  padding: 18px;
  color: #a3a3a6;
  border: 1px solid #eceae3;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}

.phone-window {
  position: absolute;
  left: calc(50% + 360px);
  top: 232px;
  width: 190px;
  height: 320px;
  padding: 18px 12px;
  background: #fff;
  border: 1px solid #dfdcd3;
  border-radius: 28px;
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.1);
}

.phone-top {
  margin-bottom: 18px;
  font-weight: 800;
}

.phone-msg,
.phone-file {
  margin-top: 10px;
  padding: 10px;
  color: #57575b;
  background: #f3f3f2;
  border-radius: 10px;
  font-size: 12px;
}

.phone-msg.soft {
  background: #eef4e9;
}

.phone-file {
  color: var(--brown);
  border: 1px solid #e4d2c6;
}

.section {
  padding: 110px 0;
}

.section-title,
.wide-card,
.lineup-card,
.split-card {
  width: min(1260px, calc(100% - 120px));
  margin: 0 auto;
}

.section-title {
  margin-bottom: 58px;
}

.section-title p {
  margin-top: 16px;
  max-width: 880px;
  font-size: 18px;
}

.wide-card,
.lineup-card,
.split-card {
  overflow: hidden;
  background: var(--card);
  border: 1px solid #e6e2d8;
  border-radius: 12px;
}

.wide-card {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  min-height: 360px;
  padding: 58px 62px;
  align-items: center;
}

.card-copy h3 {
  margin-top: 0;
  color: var(--brown);
  font-size: 24px;
}

.card-copy p + h3 {
  margin-top: 30px;
}

.line-art {
  position: relative;
  min-height: 270px;
}

.person {
  position: absolute;
  bottom: 42px;
  width: 72px;
  height: 82px;
  border: 3px solid var(--brown-soft);
  border-top-left-radius: 36px;
  border-top-right-radius: 36px;
  border-bottom: 0;
}

.person::before {
  content: "";
  position: absolute;
  top: -44px;
  left: 16px;
  width: 34px;
  height: 34px;
  border: 3px solid var(--brown-soft);
  border-radius: 50%;
}

.p1 {
  right: 320px;
}

.p2 {
  right: 214px;
}

.p3 {
  right: 104px;
}

.wire {
  position: absolute;
  border: 3px solid var(--brown-soft);
  border-bottom: 0;
  border-radius: 120px 120px 0 0;
}

.w1 {
  right: 178px;
  top: 48px;
  width: 260px;
  height: 120px;
  transform: rotate(-8deg);
}

.w2 {
  right: 62px;
  top: 68px;
  width: 260px;
  height: 110px;
  transform: rotate(10deg);
}

.paper {
  position: absolute;
  right: 246px;
  top: 36px;
  width: 72px;
  height: 46px;
  border: 3px solid var(--brown-soft);
  transform: rotate(-12deg);
}

.lineup {
  background: var(--paper-deep);
}

.lineup-card {
  padding: 58px 60px;
}

.lineup-card > p {
  margin-top: 10px;
}

.agent-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 42px;
}

.agent-grid article {
  display: grid;
  place-items: center;
  min-height: 270px;
  background: #f4f4f2;
  border: 1px solid #dfdeda;
  border-radius: 10px;
}

.agent-grid b {
  margin-top: 18px;
  color: var(--brown);
  font-family: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  font-size: 28px;
}

.agent-grid small {
  color: #949498;
  font-size: 16px;
}

.agent-icon {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  color: #fff;
  border-radius: 14px;
  font-weight: 900;
}

.agent-icon.orange {
  background: #db7654;
}

.agent-icon.blue {
  background: linear-gradient(135deg, #786fff, #8eb8ff);
}

.agent-icon.dark {
  background: #222;
}

.agent-icon.gradient {
  background: linear-gradient(135deg, #5868ff, #ff42bc);
}

.split-card {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: 540px;
}

.split-copy {
  padding: 64px 60px;
}

.split-copy h3 {
  margin-bottom: 78px;
}

.split-copy h4 + p {
  margin-top: 5px;
}

.orbit-card {
  display: grid;
  place-items: center;
  padding: 52px;
  text-align: center;
  background: var(--green);
}

.orbit-card p {
  max-width: 420px;
  margin-top: 12px;
}

.orbit {
  position: relative;
  width: 410px;
  height: 250px;
  margin-top: 50px;
}

.orbit i {
  position: absolute;
  inset: 0;
  border: 2px solid rgba(139, 86, 57, 0.46);
  border-radius: 50%;
}

.orbit i:nth-child(2) {
  transform: rotate(24deg);
}

.orbit i:nth-child(3) {
  transform: rotate(48deg);
}

.orbit i:nth-child(4) {
  transform: rotate(72deg);
}

.orbit span {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  transform: translate(-50%, -50%);
  color: #fff;
  background: linear-gradient(135deg, #5868ff, #ff42bc);
  border-radius: 50%;
  font-weight: 900;
}

.footer {
  display: flex;
  justify-content: space-between;
  padding: 34px 72px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 1100px) {
  .hero-inner,
  .wide-card,
  .split-card {
    grid-template-columns: 1fr;
  }

  .desktop-window {
    width: 760px;
  }

  .phone-window {
    display: none;
  }

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

@media (max-width: 760px) {
  .site-header {
    height: auto;
    padding: 18px 22px;
  }

  .site-nav {
    display: none;
  }

  .hero-inner,
  .section-title,
  .wide-card,
  .lineup-card,
  .split-card {
    width: calc(100% - 36px);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding-top: 58px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 34px;
  }

  .hero-actions {
    flex-wrap: wrap;
  }

  .device-stage {
    height: 500px;
  }

  .desktop-window {
    grid-template-columns: 42px 1fr;
    width: calc(100% - 36px);
    height: 360px;
  }

  .mini-list {
    display: none;
  }

  .mini-chat {
    padding: 20px;
  }

  .wide-card,
  .lineup-card,
  .split-copy,
  .orbit-card {
    padding: 34px 24px;
  }

  .agent-grid {
    grid-template-columns: 1fr;
  }

  .orbit {
    width: 280px;
    height: 180px;
  }

  .footer {
    flex-direction: column;
    gap: 10px;
    padding: 28px 22px;
  }
}