:root {
  --ink: #10202f;
  --ink-soft: #213548;
  --muted: #60707f;
  --line: #d9e5ea;
  --brand: #0f8f86;
  --brand-dark: #08665f;
  --coral: #e7664c;
  --gold: #d79b2b;
  --cloud: #f5f9f8;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--cloud);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Inter, system-ui, sans-serif;
  letter-spacing: 0;
}

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  inset: 16px 20px auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 8px;
  background: rgba(16, 32, 47, 0.82);
  padding: 10px 12px 10px 14px;
  color: var(--white);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-weight: 900;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 8px;
  background: var(--brand);
}

.brand-text {
  font-size: 17px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 14px;
  font-weight: 700;
}

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

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 900;
}

.nav-cta {
  background: var(--white);
  color: var(--ink);
}

.button.primary {
  background: var(--brand);
  color: var(--white);
  box-shadow: 0 18px 35px rgba(15, 143, 134, 0.24);
}

.button.secondary {
  border-color: rgba(255, 255, 255, 0.48);
  color: var(--white);
}

.hero {
  position: relative;
  display: grid;
  min-height: min(760px, 78vh);
  overflow: hidden;
  color: var(--white);
  place-items: end start;
}

.hero-bg,
.hero-scrim {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-bg {
  object-fit: cover;
  object-position: center;
  transform: scale(1.04);
}

.hero-scrim {
  background:
    linear-gradient(90deg, rgba(9, 20, 31, 0.94) 0%, rgba(9, 20, 31, 0.78) 42%, rgba(9, 20, 31, 0.28) 100%),
    linear-gradient(180deg, rgba(9, 20, 31, 0.24) 0%, rgba(9, 20, 31, 0.84) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 130px 0 52px;
}

.kicker,
.section-label,
.section-heading span,
.scenario-feature span,
.price-card > span {
  color: #8de1d8;
  font-size: 14px;
  font-weight: 900;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 20px;
  font-size: clamp(58px, 9vw, 132px);
  line-height: 0.94;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 700px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.72;
}

.hero-contact {
  width: fit-content;
  margin-bottom: 22px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  padding: 10px 14px;
  color: rgba(255, 255, 255, 0.88);
  font-weight: 850;
}

.hero-contact a,
.footer a,
.contact-notes a {
  color: inherit;
  font-weight: 950;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(880px, 100%);
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.hero-stats div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.08);
}

.hero-stats dt {
  font-size: 25px;
  font-weight: 950;
}

.hero-stats dd {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
  font-weight: 700;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(1180px, calc(100% - 40px));
  margin: 22px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.strip-item {
  display: grid;
  gap: 8px;
  background: var(--white);
  padding: 22px;
}

.strip-item strong {
  font-size: 18px;
}

.strip-item span {
  color: var(--muted);
  line-height: 1.7;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 92px 0;
}

.section.band {
  width: 100%;
  max-width: none;
  padding-right: max(20px, calc((100% - 1180px) / 2));
  padding-left: max(20px, calc((100% - 1180px) / 2));
  background: var(--white);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

.section-heading span,
.section-label,
.scenario-feature span,
.price-card > span {
  color: var(--brand);
}

.section-heading h2,
.split h2,
.whitepaper h2,
.contact-copy h2 {
  margin-bottom: 16px;
  font-size: clamp(34px, 4.4vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-heading p,
.intro {
  max-width: 780px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.82;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.filter {
  min-height: 38px;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  padding: 0 16px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 900;
}

.filter.active {
  border-color: var(--brand);
  background: var(--brand);
  color: var(--white);
}

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

.problem-card,
.scenario-list article,
.price-card,
.standard-grid article,
.proof-grid div,
.faq-list details,
.lead-form,
.contact-notes {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 18px 55px rgba(16, 32, 47, 0.08);
}

.problem-card {
  display: grid;
  min-height: 300px;
  grid-template-rows: auto auto 1fr auto;
  gap: 14px;
  padding: 22px;
}

.problem-card[hidden] {
  display: none;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-row span {
  border-radius: 999px;
  background: #e8f5f2;
  color: var(--brand-dark);
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 900;
}

.tag-row span + span {
  background: #fff2df;
  color: #9d6110;
}

.problem-card h3,
.scenario-feature h3,
.scenario-list h3,
.price-card h3,
.standard-grid h3 {
  font-size: 24px;
  line-height: 1.26;
  letter-spacing: 0;
}

.problem-card p,
.scenario-feature p,
.scenario-list p,
.price-card p,
.proof-grid span,
.faq-list p,
.contact-notes p,
.lead-form p {
  color: var(--muted);
  line-height: 1.76;
}

.problem-card a {
  color: var(--brand);
  font-weight: 900;
}

.scenario-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 22px;
}

.scenario-feature {
  min-height: 520px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(16, 32, 47, 0.95), rgba(15, 143, 134, 0.88)),
    url("./assets/geo-dashboard.png") center / cover;
  padding: 34px;
  color: var(--white);
}

.scenario-feature p,
.scenario-feature li {
  color: rgba(255, 255, 255, 0.76);
  line-height: 1.8;
}

.scenario-feature h3 {
  max-width: 650px;
  margin: 12px 0 16px;
  font-size: clamp(32px, 4vw, 54px);
}

.scenario-feature ul {
  margin: 30px 0 0;
  padding-left: 20px;
}

.scenario-list {
  display: grid;
  gap: 16px;
}

.scenario-list article {
  padding: 24px;
}

.split,
.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 54px;
  align-items: start;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline div {
  display: grid;
  grid-template-columns: 74px 1fr;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding: 0 0 18px;
}

.timeline strong {
  color: var(--coral);
  font-size: 34px;
}

.timeline span {
  color: var(--ink);
  font-size: 18px;
  font-weight: 850;
  line-height: 1.5;
}

.price-card {
  padding: 26px;
}

.price-card.featured {
  background: var(--ink);
  color: var(--white);
}

.price-card.featured p {
  color: rgba(255, 255, 255, 0.72);
}

.price-card strong {
  display: block;
  margin: 16px 0;
  font-size: 32px;
}

.standard-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.standard-grid article {
  padding: 28px;
}

.standard-grid ol {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding-left: 22px;
}

.standard-grid li {
  padding-left: 6px;
  color: var(--ink-soft);
  font-weight: 850;
  line-height: 1.6;
}

.warning-card {
  background: #fff7f3;
}

.whitepaper {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 42px;
  align-items: center;
}

.whitepaper img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 22px 60px rgba(16, 32, 47, 0.14);
}

.chapter-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 24px 0;
}

.chapter-list span {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 13px 14px;
  font-weight: 850;
}

.proof-section {
  padding-top: 86px;
}

.proof-grid div {
  display: grid;
  gap: 10px;
  min-height: 170px;
  padding: 24px;
}

.proof-grid strong {
  font-size: 22px;
}

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

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

.faq-list summary {
  cursor: pointer;
  font-size: 19px;
  font-weight: 950;
}

.faq-list p {
  margin: 14px 0 0;
}

.contact-section {
  padding-bottom: 96px;
}

.contact-notes,
.lead-form {
  padding: 24px;
}

.contact-notes {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.contact-notes p,
.lead-form p {
  margin: 0;
}

.lead-form {
  display: grid;
  gap: 16px;
}

.lead-form label {
  display: grid;
  gap: 8px;
  font-size: 14px;
  font-weight: 950;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 14px;
  color: var(--ink);
  outline-color: var(--brand);
}

textarea {
  min-height: 130px;
  resize: vertical;
}

.lead-form button {
  width: 100%;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  background: var(--ink);
  color: var(--white);
  padding: 32px max(20px, calc((100% - 1180px) / 2));
}

.footer div {
  display: grid;
  gap: 5px;
}

.footer strong {
  font-size: 24px;
}

.footer span,
.footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.66);
}

@media (min-width: 1220px) {
  .site-header {
    right: calc((100% - 1180px) / 2);
    left: calc((100% - 1180px) / 2);
  }
}

@media (max-width: 980px) {
  .site-header {
    inset: 10px 12px auto;
  }

  .site-nav {
    display: none;
  }

  .hero {
    min-height: 82vh;
  }

  .hero-content {
    width: min(100% - 28px, 1180px);
    padding-top: 112px;
    padding-bottom: 34px;
  }

  .hero-stats,
  .signal-strip,
  .problem-grid,
  .pricing-grid,
  .proof-grid,
  .scenario-layout,
  .split,
  .standard-grid,
  .whitepaper,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .signal-strip,
  .section {
    width: min(100% - 28px, 1180px);
  }

  .section,
  .section.band {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .scenario-feature {
    min-height: 430px;
  }
}

@media (max-width: 560px) {
  .nav-cta {
    min-height: 38px;
    padding: 0 12px;
    font-size: 13px;
  }

  .brand-text {
    font-size: 15px;
  }

  .hero {
    min-height: 88vh;
  }

  .hero-actions,
  .toolbar {
    display: grid;
  }

  .button,
  .filter {
    width: 100%;
  }

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

  .hero-stats div {
    padding: 14px;
  }

  .chapter-list {
    grid-template-columns: 1fr;
  }

  .timeline div {
    grid-template-columns: 58px 1fr;
  }

  .footer {
    display: grid;
  }
}