:root {
  color-scheme: light;
  --ink: #13201d;
  --muted: #66736f;
  --line: #dfe8e2;
  --paper: #f7faf6;
  --white: #ffffff;
  --green: #128c7e;
  --green-dark: #075e54;
  --lime: #d7f5da;
  --amber: #f6b84b;
  --blue: #2d6cdf;
  --red: #dc4b4b;
  --shadow: 0 18px 60px rgba(18, 48, 42, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 40px;
  border-bottom: 1px solid rgba(223, 232, 226, 0.9);
  background: rgba(247, 250, 246, 0.92);
  backdrop-filter: blur(16px);
}

.brand,
nav,
.hero-actions,
.screen-top,
.metric-row,
footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 8px;
  color: white;
  background: var(--green-dark);
  font-size: 14px;
}

nav {
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 52px;
  min-height: 720px;
  padding: 78px 7vw 64px;
  align-items: center;
  background:
    linear-gradient(130deg, rgba(215, 245, 218, 0.88), rgba(255, 255, 255, 0.75) 45%, rgba(45, 108, 223, 0.12)),
    radial-gradient(circle at 82% 18%, rgba(18, 140, 126, 0.18), transparent 28%);
}

.hero-copy {
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--green-dark);
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.08;
  max-width: 920px;
}

h2 {
  font-size: clamp(28px, 3.6vw, 46px);
  line-height: 1.18;
  margin-bottom: 14px;
}

h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.hero-text {
  max-width: 700px;
  color: #31413d;
  font-size: 20px;
  line-height: 1.75;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  color: white;
  background: var(--green-dark);
  border-color: var(--green-dark);
}

.button.secondary {
  background: white;
}

.hero-note,
.disclaimer {
  max-width: 820px;
  padding: 14px 16px;
  border: 1px solid rgba(246, 184, 75, 0.4);
  border-radius: 8px;
  background: #fff8e9;
  color: #6b4a10;
  line-height: 1.65;
}

.hero-product {
  position: relative;
  min-height: 520px;
}

.screen-card,
.stack-card,
.pain-grid article,
.package-grid article,
.pricing-grid article,
.contact-card,
.faq-list details,
figure {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.main-screen {
  position: relative;
  z-index: 2;
  padding: 18px;
}

.screen-top {
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.screen-top span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #b8c5bf;
}

.screen-top strong {
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
}

.metric-row {
  gap: 10px;
  margin: 18px 0;
}

.metric-row div {
  flex: 1;
  padding: 14px;
  border-radius: 8px;
  background: #eef7f3;
}

.metric-row small,
.chat-line,
figcaption,
.package-grid li,
.pricing-grid p,
.audience-list span,
.pain-grid p,
.faq-list p,
.contact p {
  color: var(--muted);
  line-height: 1.7;
}

.metric-row strong {
  display: block;
  margin-top: 6px;
  font-size: 30px;
}

.chat-line {
  margin-top: 12px;
  padding: 14px;
  border-radius: 8px;
  background: #f3f7f5;
}

.chat-line.inbound {
  color: var(--ink);
  background: var(--lime);
}

.chat-line.analysis {
  border-left: 4px solid var(--amber);
}

.chat-line.reply {
  border-left: 4px solid var(--green);
}

.stack-card {
  position: absolute;
  right: 8px;
  width: 48%;
  padding: 20px;
  font-weight: 800;
}

.stack-card:nth-of-type(2) {
  bottom: 128px;
}

.stack-card:nth-of-type(3) {
  bottom: 66px;
  right: 42px;
}

.stack-card:nth-of-type(4) {
  bottom: 4px;
  right: 78px;
}

.section {
  padding: 80px 7vw;
}

.section-heading {
  max-width: 850px;
  margin-bottom: 34px;
}

.pain-grid,
.package-grid,
.pricing-grid,
.screenshot-grid {
  display: grid;
  gap: 18px;
}

.pain-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.pain-grid article,
.package-grid article,
.pricing-grid article {
  padding: 24px;
}

.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
  gap: 44px;
  background: white;
}

.audience-list {
  display: grid;
  gap: 12px;
}

.audience-list div {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.package-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.tag {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 5px 10px;
  border-radius: 999px;
  color: white;
  font-size: 12px;
  font-weight: 800;
}

.tag.free {
  background: var(--green);
}

.tag.starter {
  background: var(--blue);
}

.tag.standard {
  background: var(--amber);
  color: #4c3305;
}

.tag.deploy {
  background: #7357d8;
}

.tag.enterprise {
  background: #202a27;
}

ul {
  margin: 18px 0 0;
  padding-left: 18px;
}

.screenshot-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

figure {
  margin: 0;
  overflow: hidden;
}

figcaption {
  padding: 16px 18px 20px;
}

.mock-shot {
  min-height: 240px;
  padding: 22px;
  color: white;
  background: #20362f;
}

.mock-shot span {
  display: inline-flex;
  margin-bottom: 24px;
  padding: 6px 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.16);
  font-weight: 800;
}

.bars {
  display: flex;
  align-items: end;
  gap: 12px;
  height: 140px;
}

.bars i {
  flex: 1;
  border-radius: 8px 8px 0 0;
  background: var(--lime);
}

.bars i:nth-child(1) {
  height: 46%;
}

.bars i:nth-child(2) {
  height: 72%;
}

.bars i:nth-child(3) {
  height: 58%;
}

.bars i:nth-child(4) {
  height: 88%;
}

.inbox-shot {
  background: #1f4f7a;
}

.report-shot {
  background: #57451d;
}

.mock-shot p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 22px;
  line-height: 1.55;
}

.pricing-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.pricing-grid article.featured {
  border-color: rgba(18, 140, 126, 0.4);
  background: #eefaf3;
}

.price {
  margin: 18px 0 10px;
  color: var(--green-dark) !important;
  font-size: 28px;
  font-weight: 900;
  line-height: 1.2 !important;
}

.disclaimer {
  margin-top: 20px;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 960px;
}

.faq-list details {
  padding: 20px 22px;
}

summary {
  cursor: pointer;
  font-weight: 900;
}

.contact {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 420px);
  gap: 32px;
  align-items: center;
  background: white;
}

.contact-card {
  padding: 24px;
}

footer {
  justify-content: space-between;
  gap: 18px;
  padding: 28px 7vw;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

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

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

@media (max-width: 760px) {
  .site-header {
    position: static;
    align-items: flex-start;
    padding: 16px 20px;
  }

  nav {
    display: none;
  }

  .hero,
  .section {
    padding: 52px 20px;
  }

  .hero {
    min-height: auto;
  }

  .hero-product {
    min-height: auto;
  }

  .stack-card {
    position: static;
    width: auto;
    margin-top: 12px;
  }

  .metric-row,
  footer {
    align-items: stretch;
    flex-direction: column;
  }

  .pain-grid,
  .package-grid,
  .pricing-grid,
  .screenshot-grid {
    grid-template-columns: 1fr;
  }

  .audience-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}