:root {
  font-family: "PingFang SC", "Microsoft YaHei UI", "Noto Sans CJK SC", system-ui, sans-serif;
  color: #edf6fc;
  background: #071421;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; min-height: 100vh; background: #071421; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
svg { width: 1em; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
::selection { color: #fff; background: #208ecb; }

.site-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background:
    linear-gradient(rgba(78, 161, 213, .042) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78, 161, 213, .042) 1px, transparent 1px),
    radial-gradient(circle at 70% 17%, rgba(40, 142, 201, .15), transparent 29%),
    #071421;
  background-size: 52px 52px, 52px 52px, auto, auto;
}

.ambient { position: absolute; border-radius: 50%; filter: blur(110px); pointer-events: none; }
.ambient-left { width: 470px; height: 470px; left: -300px; top: 200px; background: rgba(30, 144, 207, .24); }
.ambient-right { width: 520px; height: 520px; right: -330px; top: 650px; background: rgba(89, 208, 225, .11); }

.site-header {
  position: relative;
  z-index: 10;
  width: min(1240px, calc(100% - 48px));
  height: 90px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
}

.brand { display: flex; align-items: center; gap: 13px; }
.brand-logo { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 15px; background: rgba(255, 255, 255, .09); box-shadow: 0 13px 35px rgba(30, 139, 205, .21); }
.brand-logo img { width: 42px; height: 42px; object-fit: contain; }
.brand-copy { display: grid; gap: 2px; }
.brand-copy strong { font-size: 19px; letter-spacing: .04em; }
.brand-copy small { color: #8097ac; font-size: 11px; }

.header-action,
.primary-action,
.card-action,
.cta-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.header-action { padding: 11px 16px; border: 1px solid rgba(113, 205, 234, .24); border-radius: 12px; color: #d7ecf9; background: rgba(255, 255, 255, .045); }
.header-action svg { width: 16px; height: 16px; }
.header-action:hover { border-color: rgba(113, 205, 234, .43); background: rgba(72, 169, 218, .13); }

.hero-section {
  position: relative;
  z-index: 2;
  width: min(1240px, calc(100% - 48px));
  min-height: 700px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, .82fr);
  gap: clamp(58px, 8vw, 130px);
  align-items: center;
  padding: 76px 0 100px;
}

.eyebrow { display: flex; align-items: center; gap: 11px; color: #8fa7bd; font-size: 12px; letter-spacing: .1em; }
.eyebrow > span { width: 34px; height: 1px; background: #40a8dd; box-shadow: 0 0 12px #40a8dd; }
.hero-copy h1 { margin: 25px 0; color: #fff; font-size: clamp(54px, 6.5vw, 91px); line-height: 1.03; letter-spacing: -.065em; }
.hero-copy h1 span { color: #4bb1df; }
.hero-description { max-width: 650px; margin: 0; color: #a2b4c7; font-size: clamp(16px, 1.25vw, 19px); line-height: 1.95; }
.hero-actions { display: flex; align-items: center; gap: 17px; margin-top: 36px; }
.hero-actions > p { max-width: 180px; margin: 0; color: #71869b; font-size: 12px; line-height: 1.6; }
.primary-action { padding: 16px 23px; border-radius: 14px; color: #fff; font-weight: 700; background: linear-gradient(135deg, #278fc9, #3badde); box-shadow: 0 16px 38px rgba(36, 145, 204, .28); }
.primary-action svg { width: 20px; height: 20px; }
.primary-action:hover,
.card-action:hover,
.cta-action:hover { transform: translateY(-2px); box-shadow: 0 19px 44px rgba(36, 145, 204, .34); }
.safety-note { display: flex; align-items: flex-start; gap: 8px; max-width: 570px; margin-top: 27px; color: #6f879e; font-size: 12px; line-height: 1.6; }
.safety-note svg { flex: 0 0 auto; width: 16px; height: 16px; margin-top: 1px; color: #55b9d9; }

.agent-visual { position: relative; min-height: 520px; display: grid; place-items: center; }
.orbit { position: absolute; border: 1px solid rgba(80, 184, 222, .17); border-radius: 50%; pointer-events: none; }
.orbit-one { width: 430px; height: 430px; }
.orbit-two { width: 350px; height: 350px; border-style: dashed; opacity: .55; }
.orbit-one::after { content: ""; position: absolute; inset: -7px; border: 1px solid transparent; border-top-color: rgba(87, 197, 225, .4); border-radius: 50%; transform: rotate(-22deg); }
.agent-card { position: relative; width: min(100%, 450px); padding: 27px; overflow: hidden; border: 1px solid rgba(125, 206, 237, .17); border-radius: 27px; background: linear-gradient(155deg, rgba(17, 40, 62, .96), rgba(9, 24, 40, .95)); box-shadow: 0 38px 90px rgba(0, 0, 0, .42); backdrop-filter: blur(20px); }
.agent-card::before { content: ""; position: absolute; width: 220px; height: 220px; right: -110px; top: -110px; border-radius: 50%; background: rgba(48, 158, 211, .16); filter: blur(25px); }
.agent-card > header { position: relative; display: flex; align-items: center; gap: 14px; padding-bottom: 22px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.agent-logo { width: 65px; height: 65px; display: grid; place-items: center; border-radius: 19px; background: #fff; }
.agent-logo img { width: 55px; height: 55px; object-fit: contain; }
.agent-card header > div { display: grid; gap: 3px; }
.agent-card header small { color: #7890a7; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.agent-card header strong { font-size: 21px; }
.online { margin-left: auto; display: flex; align-items: center; gap: 6px; color: #8cb8c8; font-size: 11px; }
.online i { width: 7px; height: 7px; border-radius: 50%; background: #5fd3b2; box-shadow: 0 0 0 5px rgba(95, 211, 178, .1); }
.conversation-preview { padding: 26px 0 25px; display: grid; gap: 17px; }
.conversation-preview p { margin: 0; line-height: 1.75; font-size: 13px; }
.user-bubble { justify-self: end; max-width: 83%; padding: 13px 15px; border-radius: 17px 17px 5px 17px; color: #d5e3ec; background: rgba(255, 255, 255, .07); }
.assistant-row { display: flex; align-items: flex-start; gap: 10px; }
.assistant-row > span { width: 33px; height: 33px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 10px; background: #fff; }
.assistant-row img { width: 27px; height: 27px; object-fit: contain; }
.assistant-row p { padding: 13px 15px; border-radius: 5px 17px 17px; color: #cce4ef; background: rgba(41, 145, 196, .13); }
.card-action { width: 100%; padding: 13px 18px; border-radius: 12px; color: #eaf8ff; background: #258fc7; font-weight: 700; }
.card-action svg { width: 16px; height: 16px; }

.capabilities { position: relative; z-index: 2; width: min(1240px, calc(100% - 48px)); margin: 0 auto; padding: 100px 0 124px; border-top: 1px solid rgba(255, 255, 255, .08); }
.section-heading > span { color: #49a9d8; font-size: 11px; letter-spacing: .18em; text-transform: uppercase; }
.section-heading h2 { margin: 10px 0 40px; color: #f5f9fc; font-size: clamp(34px, 4vw, 53px); letter-spacing: -.04em; }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.capability-card { position: relative; min-height: 230px; padding: 29px; border: 1px solid rgba(255, 255, 255, .09); border-radius: 20px; background: rgba(255, 255, 255, .035); transition: transform .25s ease, border-color .25s ease, background .25s ease; }
.capability-card:hover { transform: translateY(-7px); border-color: rgba(67, 170, 216, .3); background: rgba(40, 138, 185, .075); }
.card-icon { width: 45px; height: 45px; display: grid; place-items: center; border-radius: 13px; color: #7dd0e9; background: rgba(58, 168, 215, .12); }
.card-icon svg { width: 22px; height: 22px; }
.card-index { position: absolute; right: 24px; top: 27px; color: rgba(255, 255, 255, .16); font-size: 13px; font-weight: 700; }
.capability-card h3 { margin: 35px 0 11px; font-size: 20px; }
.capability-card p { margin: 0; color: #8297aa; font-size: 13px; line-height: 1.8; }

.agent-cta { position: relative; z-index: 2; width: min(1240px, calc(100% - 48px)); margin: 0 auto 70px; padding: 34px 37px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 21px; border: 1px solid rgba(98, 190, 225, .2); border-radius: 23px; background: linear-gradient(100deg, rgba(31, 112, 158, .18), rgba(255, 255, 255, .035)); }
.cta-logo { width: 66px; height: 66px; display: grid; place-items: center; border-radius: 18px; background: #fff; }
.cta-logo img { width: 56px; height: 56px; object-fit: contain; }
.agent-cta small { color: #6daec8; font-size: 11px; letter-spacing: .15em; }
.agent-cta h2 { margin: 5px 0; color: #f5faff; font-size: 25px; }
.agent-cta p { margin: 0; color: #7e95a8; font-size: 12px; }
.cta-action { padding: 14px 20px; border-radius: 13px; color: #fff; background: #268fc5; font-weight: 700; }

.site-footer { position: relative; z-index: 2; width: min(1240px, calc(100% - 48px)); min-height: 100px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-top: 1px solid rgba(255, 255, 255, .08); color: #60768b; font-size: 11px; }
.site-footer div { display: flex; align-items: center; gap: 9px; color: #cfdeea; font-size: 14px; }
.site-footer img { width: 27px; height: 27px; object-fit: contain; }
.site-footer p { margin: 0; }
.site-footer > span { justify-self: end; }
.site-footer b { font-weight: 500; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal-delay-short { transition-delay: .08s; }
.reveal-delay { transition-delay: .16s; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
  .site-header { width: min(100% - 32px, 720px); height: 78px; }
  .brand-copy small { display: none; }
  .hero-section { width: min(100% - 32px, 720px); grid-template-columns: 1fr; gap: 46px; padding: 65px 0 82px; }
  .hero-copy h1 { font-size: clamp(49px, 13vw, 72px); }
  .agent-visual { min-height: auto; }
  .orbit-one { width: 360px; height: 360px; }
  .orbit-two { width: 295px; height: 295px; }
  .capabilities { width: min(100% - 32px, 720px); padding: 78px 0 90px; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-card { min-height: 190px; }
  .agent-cta { width: min(100% - 32px, 720px); grid-template-columns: auto 1fr; margin-bottom: 45px; }
  .cta-action { grid-column: 1 / -1; width: 100%; }
  .site-footer { width: min(100% - 32px, 720px); grid-template-columns: 1fr; gap: 9px; padding: 25px 0 115px; text-align: center; }
  .site-footer div { justify-content: center; }
  .site-footer > span { justify-self: center; }
}

@media (max-width: 520px) {
  .header-action { padding: 10px 12px; font-size: 12px; }
  .brand-copy strong { font-size: 17px; }
  .brand-logo { width: 43px; height: 43px; }
  .brand-logo img { width: 38px; height: 38px; }
  .hero-section { padding-top: 50px; }
  .eyebrow { font-size: 10px; letter-spacing: .07em; line-height: 1.5; }
  .hero-copy h1 { font-size: clamp(45px, 14vw, 62px); }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .agent-card { padding: 21px; border-radius: 22px; }
  .agent-logo { width: 56px; height: 56px; }
  .agent-logo img { width: 48px; height: 48px; }
  .orbit-one { width: 280px; height: 280px; }
  .orbit-two { width: 225px; height: 225px; }
  .agent-cta { padding: 25px; grid-template-columns: 1fr; text-align: center; }
  .cta-logo { margin: 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}