:root {
  --ink: #111827;
  --muted: #64707d;
  --paper: #f6f8f7;
  --panel: #ffffff;
  --line: rgba(17, 24, 39, 0.12);
  --dark: #08111f;
  --green: #13a36f;
  --green-dark: #0b6b4a;
  --cyan: #17a7c7;
  --orange: #e78932;
  --shadow: 0 24px 70px rgba(8, 17, 31, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.6;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 16px clamp(18px, 4vw, 56px);
  color: var(--ink);
  transition: color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.site-header.is-elevated {
  color: var(--ink);
  background: rgba(246, 248, 247, 0.92);
  box-shadow: 0 12px 34px rgba(8, 17, 31, 0.1);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--green), var(--cyan));
}

.nav-links {
  justify-self: center;
  display: flex;
  gap: clamp(14px, 2vw, 30px);
  font-size: 15px;
}

.nav-links a {
  opacity: 0.84;
}

.nav-cta,
.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid currentColor;
  border-radius: 8px;
  padding: 10px 18px;
  font-weight: 800;
  white-space: nowrap;
}

.hero {
  position: relative;
  min-height: 92svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--ink);
}

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

.hero-image {
  object-fit: cover;
}

.hero-scrim {
  background:
    linear-gradient(90deg, rgba(246, 250, 249, 0.94) 0%, rgba(246, 250, 249, 0.82) 34%, rgba(246, 250, 249, 0.2) 76%),
    linear-gradient(0deg, rgba(246, 250, 249, 0.86) 0%, rgba(246, 250, 249, 0) 46%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(820px, calc(100% - 36px));
  margin-left: clamp(18px, 7vw, 104px);
  padding: 150px 0 clamp(64px, 8vw, 104px);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0;
}

.hero h1,
h2 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 780px;
  font-size: clamp(42px, 7vw, 88px);
}

.hero-copy {
  max-width: 720px;
  margin: 24px 0 0;
  color: #4e5b66;
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button.primary {
  border-color: var(--green);
  color: #fff;
  background: var(--green);
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.58);
  border-color: rgba(17, 24, 39, 0.18);
  backdrop-filter: blur(10px);
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.signal-strip span {
  min-height: 88px;
  display: grid;
  place-items: center;
  padding: 18px;
  border-right: 1px solid var(--line);
  color: var(--green-dark);
  font-weight: 900;
}

.section {
  padding: clamp(68px, 9vw, 118px) clamp(18px, 5vw, 72px);
}

.section-intro {
  display: grid;
  gap: 10px;
  margin-bottom: 34px;
}

.section-intro.compact {
  max-width: 820px;
}

h2 {
  max-width: 980px;
  font-size: clamp(30px, 4vw, 54px);
}

h3 {
  margin: 0;
  font-size: 21px;
  line-height: 1.25;
}

p {
  color: var(--muted);
}

.pain {
  background: #fff;
}

.pain-grid,
.industry-grid,
.offer-grid,
.funnel {
  display: grid;
  gap: 16px;
}

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

.pain-grid article,
.solution-list article,
.industry-panel,
.funnel article,
.offer-grid article,
.diagnosis-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 14px 36px rgba(8, 17, 31, 0.06);
}

.pain-grid article {
  min-height: 260px;
  padding: 28px;
}

.pain-grid span {
  display: inline-flex;
  margin-bottom: 44px;
  color: var(--orange);
  font-weight: 900;
}

.solutions {
  background: #eef8f4;
}

.solution-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.solution-list article {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  min-height: 190px;
  padding: 28px;
}

.solution-index {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  color: #fff;
  background: var(--dark);
  font-weight: 900;
}

.industries {
  background: #f9fbfb;
}

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

.industry-card {
  min-height: 132px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.industry-card strong,
.industry-card span {
  display: block;
}

.industry-card strong {
  font-size: 20px;
}

.industry-card span {
  margin-top: 12px;
  color: var(--muted);
}

.industry-card.active {
  color: #fff;
  border-color: var(--dark);
  background: var(--dark);
}

.industry-card.active span {
  color: rgba(255, 255, 255, 0.74);
}

.industry-panel {
  margin-top: 16px;
  padding: 30px;
  border-left: 6px solid var(--green);
}

.panel-label {
  margin: 0 0 8px;
  color: var(--green);
  font-weight: 900;
}

.proof {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(28px, 5vw, 70px);
  align-items: start;
  background: var(--dark);
  color: #fff;
}

.proof p {
  color: rgba(255, 255, 255, 0.72);
}

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

.funnel article {
  min-height: 170px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
}

.funnel span {
  color: var(--cyan);
  font-weight: 900;
}

.offer {
  background: #fff;
}

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

.offer-grid article {
  min-height: 280px;
  padding: 30px;
}

.offer-grid .featured {
  color: #fff;
  background: linear-gradient(135deg, var(--green-dark), #10283f);
  transform: translateY(-10px);
}

.offer-grid .featured p,
.offer-grid .featured .offer-tag {
  color: rgba(255, 255, 255, 0.76);
}

.offer-tag {
  margin-top: 0;
  color: var(--green);
  font-weight: 900;
}

.offer-grid strong {
  display: inline-flex;
  margin-top: 22px;
  color: var(--orange);
}

.diagnosis {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 0.7fr);
  gap: clamp(28px, 6vw, 86px);
  align-items: start;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(8, 17, 31, 0.96), rgba(8, 17, 31, 0.86)),
    radial-gradient(circle at top right, rgba(19, 163, 111, 0.36), transparent 38%);
}

.diagnosis p {
  max-width: 660px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
}

.diagnosis-form {
  display: grid;
  gap: 18px;
  padding: 26px;
  color: var(--ink);
}

.diagnosis-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 800;
}

.diagnosis-form input,
.diagnosis-form select,
.diagnosis-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--ink);
  background: #fff;
}

.diagnosis-form textarea {
  resize: vertical;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(18px, 5vw, 72px);
  color: var(--muted);
  background: #fff;
}

@media (max-width: 1050px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .signal-strip,
  .pain-grid,
  .solution-list,
  .industry-grid,
  .funnel,
  .offer-grid,
  .proof,
  .diagnosis {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand span:last-child {
    max-width: 8em;
    line-height: 1.2;
  }

  .nav-cta {
    min-height: 40px;
    padding: 8px 12px;
    font-size: 14px;
  }

  .hero {
    min-height: 90svh;
  }

  .hero-content {
    width: calc(100% - 32px);
    margin: 0 auto;
    padding-top: 118px;
  }

  .hero-actions,
  .site-footer {
    flex-direction: column;
  }

  .hero-actions {
    display: grid;
  }

  .signal-strip,
  .pain-grid,
  .solution-list,
  .industry-grid,
  .funnel,
  .offer-grid,
  .proof,
  .diagnosis {
    grid-template-columns: 1fr;
  }

  .pain-grid article,
  .offer-grid article {
    min-height: auto;
  }

  .pain-grid span {
    margin-bottom: 26px;
  }

  .offer-grid .featured {
    transform: none;
  }
}