:root {
  --ink: #17211f;
  --ink-soft: #5b6965;
  --paper: #f5f7f6;
  --surface: #fff;
  --line: rgba(23, 33, 31, 0.11);
  --mint: #05c9ad;
  --mint-deep: #008c79;
  --blue: #2b64ef;
  --violet: #7767ed;
  --orange: #f19a3d;
  --navy: #172c34;
  --shadow-lg: 0 36px 90px rgba(29, 58, 54, 0.14);
  --shadow-md: 0 18px 45px rgba(29, 58, 54, 0.09);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 16px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  transform: translateY(-150%);
}

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

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  height: 82px;
  border-bottom: 1px solid rgba(23, 33, 31, 0.08);
}

.header-inner { height: 100%; display: flex; align-items: center; gap: 40px; }

.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 760; letter-spacing: -0.03em; }

.brand-mark {
  position: relative;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(145deg, #03d5b7 0%, #08bcae 48%, #2a6df2 100%);
  border-radius: 12px 12px 12px 4px;
  box-shadow: 0 8px 22px rgba(0, 173, 151, 0.2);
}

.brand-mark::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  right: -15px;
  bottom: -16px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  transform: rotate(45deg);
}

.brand-mark span { position: relative; z-index: 1; font-size: 11px; font-weight: 800; }
.brand-name { font-size: 20px; }

.site-nav { display: flex; gap: 30px; margin-left: auto; color: #4d5b57; font-size: 14px; font-weight: 570; }
.site-nav a { transition: color 160ms ease; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--mint-deep); }

.availability {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  color: #5c625d;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 650;
}

.availability i { width: 7px; height: 7px; background: var(--orange); border-radius: 50%; box-shadow: 0 0 0 4px rgba(241, 154, 61, 0.14); }

.hero {
  position: relative;
  overflow: hidden;
  min-height: 900px;
  padding: 162px 0 104px;
  background: radial-gradient(circle at 12% 10%, rgba(5, 201, 173, 0.14), transparent 27%), linear-gradient(180deg, #f2f8f5, #f7f8f7 75%, var(--paper));
}

.hero-grid-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.26;
  background-image: linear-gradient(rgba(17, 42, 37, 0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(17, 42, 37, 0.045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, #000 10%, transparent 82%);
}

.hero-layout { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(530px, 0.96fr); gap: 46px; align-items: center; }

.eyebrow, .section-index { margin: 0 0 24px; color: var(--mint-deep); font-size: 12px; font-weight: 790; letter-spacing: 0.15em; }
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { width: 24px; height: 1px; background: currentColor; }

.hero h1 { margin: 0; font-size: clamp(44px, 4.8vw, 68px); font-weight: 760; line-height: 1.13; letter-spacing: -0.055em; }
.hero h1 em { position: relative; color: var(--blue); font-style: normal; }
.hero h1 em::after { content: ""; position: absolute; left: 2px; right: 0; bottom: -4px; height: 5px; background: linear-gradient(90deg, var(--mint), var(--blue)); border-radius: 99px; transform: rotate(-1deg); }

.hero-lede { max-width: 650px; margin: 28px 0 0; color: var(--ink-soft); font-size: 18px; line-height: 1.9; }

.primary-link { display: inline-flex; align-items: center; gap: 18px; margin-top: 35px; padding: 13px 19px; color: #fff; background: var(--ink); border-radius: 12px; box-shadow: 0 10px 25px rgba(23, 33, 31, 0.15); font-size: 14px; font-weight: 680; transition: transform 160ms ease, background 160ms ease; }
.primary-link:hover, .primary-link:focus-visible { background: #263a36; transform: translateY(-2px); }

.product-stage { position: relative; min-height: 620px; display: grid; place-items: center; }
.stage-orbit { position: absolute; width: 570px; height: 570px; border: 1px solid rgba(5, 201, 173, 0.14); border-radius: 50%; box-shadow: inset 0 0 100px rgba(43, 100, 239, 0.04); }
.stage-orbit::before { content: ""; position: absolute; inset: 70px; border: 1px dashed rgba(43, 100, 239, 0.12); border-radius: 50%; }

.chat-window { position: relative; z-index: 2; width: min(100%, 545px); overflow: hidden; background: rgba(255,255,255,.94); border: 1px solid rgba(29,65,60,.1); border-radius: 24px; box-shadow: var(--shadow-lg); transform: rotate(1deg); }
.chat-topbar { min-height: 72px; display: flex; align-items: center; gap: 12px; padding: 0 20px; background: #f8faf9; border-bottom: 1px solid rgba(23,33,31,.08); }
.group-avatar { width: 38px; height: 38px; display: grid; place-items: center; flex: 0 0 auto; color: #fff; background: linear-gradient(145deg,#735df0,#4356d9); border-radius: 50%; font-size: 13px; font-weight: 720; }
.chat-topbar strong, .chat-topbar small { display: block; }
.chat-topbar strong { font-size: 14px; }
.chat-topbar small { color: #8c9692; font-size: 10px; }
.chat-topbar .more { margin-left: auto; color: #a0a9a5; letter-spacing: .1em; }
.chat-body { min-height: 445px; padding: 30px 23px 29px; background: linear-gradient(180deg,#fbfcfc,#f6f9f8); }

.message { display: flex; gap: 11px; }
.message small { display: block; margin-bottom: 5px; color: #909996; font-size: 10px; }
.human-avatar, .bot-avatar { width: 32px; height: 32px; display: grid; place-items: center; flex: 0 0 auto; color: #fff; font-weight: 750; }
.human-avatar { background: var(--orange); border-radius: 50%; font-size: 11px; }
.bot-avatar { background: linear-gradient(145deg,#04d0b3,#1d93cf); border-radius: 10px 10px 10px 4px; font-size: 9px; }
.human-message p { margin: 0; padding: 10px 13px; color: #28312f; background: #dce9ff; border-radius: 4px 12px 12px; font-size: 12px; }
.human-message b { color: var(--blue); }
.bot-message { margin-top: 29px; }
.bot-column { min-width: 0; flex: 1; }
.bot-column > small i { padding: 2px 4px; color: #8e6a08; background: #fff2c6; border-radius: 4px; font-style: normal; }

.project-card { overflow: hidden; background: #fff; border: 1px solid rgba(28,52,48,.1); border-radius: 13px; box-shadow: 0 12px 30px rgba(30,54,50,.07); }
.project-card header { min-height: 53px; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 0 14px; background: linear-gradient(90deg,rgba(5,201,173,.1),rgba(43,100,239,.05)); border-bottom: 1px solid rgba(28,52,48,.07); }
.project-card header span { display: flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 700; }
.project-card header i { width: 7px; height: 7px; background: var(--mint); border-radius: 50%; box-shadow: 0 0 0 4px rgba(5,201,173,.12); }
.project-card header small { margin: 0; font-size: 8px; }
.project-card ul { margin: 0; padding: 3px 14px; list-style: none; }
.project-card li { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; padding: 11px 0; border-bottom: 1px solid rgba(28,52,48,.07); }
.project-card li:last-child { border: 0; }
.task-symbol { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 8px; font-size: 9px; font-weight: 800; }
.task-symbol.blue { color: #285add; background: #e8efff; }
.task-symbol.mint { color: #008d78; background: #dff8f1; }
.task-symbol.violet { color: #6a56d9; background: #eeebff; }
.project-card li p { margin: 0; }
.project-card li strong, .project-card li small { display: block; }
.project-card li strong { font-size: 10px; }
.project-card li small { margin: 0; color: #89918f; font-size: 8px; }
.project-card li > b { padding: 3px 6px; border-radius: 999px; font-size: 8px; }
.project-card .done { color: #58706b; background: #edf2f1; }
.project-card .active { color: #007c69; background: #dcf7f0; }
.project-card .waiting { color: #9a5e16; background: #fff0db; }
.project-card footer { display: flex; justify-content: space-between; padding: 9px 14px; color: #8a9591; background: #fafbfb; border-top: 1px solid rgba(28,52,48,.07); font-size: 8px; }

.floating-chip { position: absolute; z-index: 3; display: flex; align-items: center; gap: 9px; padding: 10px 12px; background: rgba(255,255,255,.94); border: 1px solid rgba(29,65,60,.1); border-radius: 13px; box-shadow: var(--shadow-md); backdrop-filter: blur(14px); }
.floating-chip > span { width: 30px; height: 30px; display: grid; place-items: center; color: #087d6e; background: #def8f1; border-radius: 9px; font-size: 11px; font-weight: 800; }
.floating-chip p { margin: 0; }
.floating-chip strong, .floating-chip small { display: block; }
.floating-chip strong { font-size: 10px; }
.floating-chip small { color: #8a9591; font-size: 8px; }
.floating-chip > i { width: 7px; height: 7px; background: var(--mint); border-radius: 50%; box-shadow: 0 0 0 3px rgba(5,201,173,.12); }
.chip-left { left: -20px; bottom: 64px; }
.chip-right { top: 66px; right: -19px; }
.chip-right > span { color: #5f54d2; background: #ece9ff; }

.section { padding: 116px 0; }
.value-section { background: #fff; }
.section-heading { display: grid; grid-template-columns: minmax(0,1.5fr) minmax(280px,.5fr); gap: 80px; align-items: end; margin-bottom: 54px; }
.section-heading h2, .difference-intro h2 { margin: 0; font-size: clamp(32px,3.6vw,48px); line-height: 1.24; letter-spacing: -.04em; }
.section-heading > p { margin: 0 0 7px; color: var(--ink-soft); line-height: 1.85; }

.value-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.value-card { position: relative; min-height: 450px; overflow: hidden; padding: 40px; background: #f4f7f6; border: 1px solid rgba(23,33,31,.08); border-radius: 24px; }
.value-card-main { min-height: 380px; grid-column: 1 / -1; padding-right: 55%; }
.card-number { position: absolute; top: 27px; right: 29px; color: rgba(23,33,31,.24); font-size: 11px; font-weight: 750; letter-spacing: .1em; }
.card-kicker { margin: 0 0 19px; color: var(--mint-deep); font-size: 10px; font-weight: 800; letter-spacing: .15em; }
.value-card h3 { max-width: 560px; margin: 0 0 15px; font-size: 28px; line-height: 1.33; letter-spacing: -.035em; }
.card-copy { max-width: 570px; margin: 0; color: #64706d; line-height: 1.8; }

.one-project-visual { position: absolute; top: 50%; right: 52px; width: 43%; height: 285px; transform: translateY(-50%); }
.project-node { position: absolute; z-index: 2; display: grid; place-items: center; min-width: 88px; height: 37px; padding: 0 12px; background: #fff; border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 9px 22px rgba(31,58,54,.08); font-size: 10px; font-weight: 650; }
.project-center { top: 50%; left: 50%; min-width: 115px; height: 48px; color: #fff; background: linear-gradient(145deg,#04c9ad,#268ee1); border: 0; transform: translate(-50%,-50%); }
.node-chat { top: 5px; left: 50%; transform: translateX(-50%); }
.node-plan { left: 0; top: 50%; transform: translateY(-50%); }
.node-code { right: 0; top: 50%; transform: translateY(-50%); }
.node-test { bottom: 4px; left: 50%; transform: translateX(-50%); }
.one-project-visual i { position: absolute; z-index: 1; display: block; width: 1px; height: 85px; background: linear-gradient(var(--mint),rgba(5,201,173,.1)); transform-origin: center bottom; }
.line-chat { top: 42px; left: 50%; }
.line-test { bottom: 42px; left: 50%; transform: rotate(180deg); }
.line-plan { top: 50%; left: 25%; transform: rotate(-90deg); }
.line-code { top: 50%; right: 25%; transform: rotate(90deg); }

.member-visual { position: absolute; inset: auto 40px 34px; display: grid; gap: 8px; }
.member-visual > div { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; padding: 9px 11px; background: #fff; border: 1px solid rgba(23,33,31,.08); border-radius: 11px; }
.member-avatar { width: 30px; height: 30px; display: grid; place-items: center; color: #fff; border-radius: 50%; font-size: 9px; font-weight: 750; }
.orange { background: var(--orange); }.purple { background: var(--violet); }.blue-avatar { background: #3984b4; }
.member-visual p { margin: 0; }.member-visual strong,.member-visual small { display: block; }.member-visual strong { font-size: 10px; }.member-visual small { color: #8c9692; font-size: 8px; }
.member-visual i { padding: 3px 7px; color: #087c6e; background: #dff8f1; border-radius: 999px; font-size: 8px; font-style: normal; font-weight: 700; }

.value-card-dark { color: #fff; background: radial-gradient(circle at 110% 0%,rgba(5,201,173,.34),transparent 36%),linear-gradient(145deg,#182c34,#152422); }
.value-card-dark .card-number { color: rgba(255,255,255,.24); }.value-card-dark .card-kicker { color: #5fe1cf; }.value-card-dark .card-copy { color: #aec0bb; }
.progress-visual { position: absolute; inset: auto 40px 36px; display: grid; gap: 9px; }
.progress-visual div { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; padding: 10px 12px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); border-radius: 10px; color: #dce5e2; font-size: 10px; }
.progress-visual i { width: 7px; height: 7px; border-radius: 50%; }.dot-green { background: #36d9bd; }.dot-blue { background: #5e8cff; }.dot-orange { background: #f6a54f; }
.progress-visual b { color: #91a7a1; font-size: 9px; font-weight: 560; }

.difference-section { background: var(--paper); }
.difference-intro { max-width: 940px; margin-bottom: 52px; }
.difference-intro > p:last-child { max-width: 780px; margin: 25px 0 0; color: var(--ink-soft); font-size: 17px; line-height: 1.85; }

.comparison { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 24px; box-shadow: var(--shadow-md); }
.comparison-head, .comparison-row { display: grid; grid-template-columns: .72fr 1fr 1fr 1.18fr; }
.comparison-head { min-height: 84px; align-items: center; color: #7e8985; background: #f8faf9; border-bottom: 1px solid var(--line); font-size: 11px; font-weight: 740; }
.comparison-head > span, .comparison-row > span, .comparison-row > strong { height: 100%; display: flex; align-items: center; padding: 18px 22px; border-right: 1px solid var(--line); }
.comparison-head > span:last-child, .comparison-row > span:last-child { border-right: 0; }
.comparison-head .cothread-column { gap: 8px; color: #fff; background: var(--navy); }
.comparison-head .cothread-column i { width: 25px; height: 25px; display: grid; place-items: center; background: linear-gradient(145deg,#04d0b3,#3281e5); border-radius: 7px; font-size: 8px; font-style: normal; }
.comparison-row { min-height: 86px; border-bottom: 1px solid var(--line); }
.comparison-row:last-child { border-bottom: 0; }
.comparison-row > strong { color: #27332f; background: #fafbfb; font-size: 12px; }
.comparison-row > span { color: #6e7975; font-size: 12px; line-height: 1.55; }
.comparison-row .cothread-column { color: #1f3c37; background: rgba(5,201,173,.055); font-weight: 620; }

.site-footer { padding: 53px 0; color: #85948f; background: #121d1b; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.footer-brand { color: #fff; }.footer-inner p { margin: 0; font-size: 12px; }

@media (max-width: 1050px) {
  .hero-layout { grid-template-columns: 1fr; }
  .hero-copy { max-width: 800px; }
  .product-stage { min-height: 590px; }
  .chat-window { width: min(100%,620px); }
  .chip-left { left: calc(50% - 350px); }.chip-right { right: calc(50% - 350px); }
  .section-heading { grid-template-columns: 1fr; gap: 28px; }
  .section-heading > p { max-width: 690px; }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 32px,620px); }
  .site-header { height: 70px; }
  .header-inner { gap: 10px; }.site-nav { display: none; }.brand-name { font-size: 18px; }.brand-mark { width: 34px; height: 34px; }
  .availability { margin-left: auto; padding: 6px 9px; font-size: 10px; }
  .hero { min-height: auto; padding: 120px 0 72px; }
  .hero h1 { font-size: clamp(40px,11.5vw,56px); }.hero-lede { font-size: 16px; }.primary-link { width: 100%; justify-content: center; }
  .product-stage { min-height: 490px; margin-top: 30px; }.stage-orbit { width: 440px; height: 440px; }.chat-window { transform: none; }
  .chat-body { min-height: 390px; padding: 22px 14px; }.project-card li { grid-template-columns: auto 1fr; }.project-card li > b { display: none; }
  .chip-right { top: 10px; right: -3px; }.chip-left { left: -3px; bottom: 1px; }
  .section { padding: 82px 0; }.section-heading { margin-bottom: 38px; }
  .value-grid { grid-template-columns: 1fr; }.value-card, .value-card-main { min-height: 450px; grid-column: auto; padding: 31px 24px; }.value-card-main { min-height: 600px; }
  .one-project-visual { top: auto; right: 20px; bottom: 20px; width: calc(100% - 40px); height: 280px; transform: none; }
  .member-visual,.progress-visual { inset-inline: 24px; }
  .comparison { overflow-x: auto; border-radius: 18px; }.comparison-head,.comparison-row { min-width: 790px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }.footer-inner p { max-width: 290px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}