:root {
  --orange: #ff790f;
  --orange-dark: #ca5300;
  --green: #54a449;
  --green-deep: #1d5739;
  --ink: #1e2420;
  --muted: #5f6a63;
  --line: #dfe6df;
  --paper: #fffaf5;
  --soft: #f4f7f1;
  --white: #ffffff;
  --shadow: 0 20px 50px rgba(32, 36, 30, 0.1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 12px clamp(20px, 5vw, 72px);
  background: rgba(255, 250, 245, 0.96);
  border-bottom: 1px solid rgba(223, 230, 223, 0.8);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 6px;
  object-fit: cover;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  color: var(--muted);
  font-size: 14px;
}

nav a:hover { color: var(--orange-dark); }

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 6px;
  font-weight: 700;
}

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

.button.secondary {
  color: var(--ink);
  border: 1px solid var(--line);
  background: transparent;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.75fr);
  align-items: center;
  gap: clamp(40px, 7vw, 104px);
  padding: clamp(64px, 9vw, 124px) clamp(20px, 5vw, 72px) 56px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--orange-dark);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(46px, 6.2vw, 78px);
  line-height: 1.1;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.25;
}

.hero-text {
  max-width: 760px;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-journey {
  position: relative;
  padding: clamp(26px, 4vw, 42px);
  background: var(--ink);
  color: var(--white);
  border: 1px solid #354238;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.journey-label {
  margin: 0 0 26px;
  color: #ffb37a;
  font-size: 13px;
  font-weight: 800;
}

.journey-card,
.journey-result {
  position: relative;
  display: grid;
  gap: 7px;
  padding: 18px 20px;
  border-radius: 6px;
}

.journey-card span,
.journey-result span {
  font-size: 13px;
  font-weight: 800;
}

.journey-card strong,
.journey-result strong {
  font-size: 17px;
  line-height: 1.45;
}

.journey-question {
  background: #303a33;
  border-left: 4px solid var(--orange);
}

.journey-knowledge {
  background: #263b2e;
  border-left: 4px solid var(--green);
}

.journey-result {
  background: var(--orange);
  color: #251409;
}

.journey-connector {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding-left: 22px;
}

.journey-connector span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #ffb37a;
}

.journey-connector.is-green span { background: #8dc67e; }

.fact-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--green-deep);
  color: var(--white);
}

.fact-strip div {
  min-height: 118px;
  padding: 24px clamp(18px, 3vw, 34px);
  border-right: 1px solid rgba(255,255,255,0.2);
}

.fact-strip strong {
  display: block;
  font-size: 30px;
  line-height: 1;
}

.fact-strip span {
  display: block;
  margin-top: 12px;
  color: rgba(255,255,255,0.76);
}

.section {
  padding: clamp(72px, 9vw, 118px) clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 920px;
  margin-bottom: 34px;
}

.section-intro {
  max-width: 720px;
  margin: 14px 0 0;
  color: var(--muted);
}

.intro-grid,
.industry-grid,
.proof-grid,
.case-grid,
.quote-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.intro-grid article,
.industry-grid article,
.proof-grid article,
.case-grid article {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

@media (hover: hover) {
  .intro-grid article:hover,
  .industry-grid article:hover,
  .proof-grid article:hover,
  .case-grid article:hover {
    transform: translateY(-3px);
    border-color: rgba(84, 164, 73, 0.6);
    box-shadow: var(--shadow);
  }
}

.intro-grid p,
.industry-grid p,
.proof-grid p,
.case-grid p,
.service-list p,
.timeline span,
.contact p {
  color: var(--muted);
}

.proof { background: var(--soft); }

.proof-grid article {
  min-height: 196px;
  border-top: 4px solid var(--orange);
}

.intro-grid article {
  position: relative;
  min-height: 220px;
  padding-top: 72px;
}

.intro-grid article::before {
  position: absolute;
  top: 24px;
  left: 24px;
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 900;
}

.intro-grid article:nth-child(1)::before { content: "01 / KNOWLEDGE"; }
.intro-grid article:nth-child(2)::before { content: "02 / WEBSITE"; }
.intro-grid article:nth-child(3)::before { content: "03 / GEO"; }
.intro-grid article:nth-child(4)::before { content: "04 / TRUST"; }

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

.services .eyebrow { color: #ffb37a; }
.services h2 { color: var(--white); }

.service-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.service-list article {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 14px 18px;
  padding: 28px;
  background: #29312c;
  border: 1px solid #3d4941;
  border-radius: 6px;
}

.service-list span {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--orange);
  color: var(--orange-dark);
  font-weight: 900;
  border-radius: 6px;
}

.service-list h3 { margin: 10px 0 0; }
.service-list p { grid-column: 2; margin: 0; color: rgba(255,255,255,0.68); }

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

.industry-grid article {
  min-height: 170px;
  border-top: 4px solid var(--green);
}

.timeline {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: steps;
}

.timeline li {
  counter-increment: steps;
  display: grid;
  grid-template-columns: 64px minmax(200px, 280px) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.timeline li::before {
  content: counter(steps, decimal-leading-zero);
  color: var(--green);
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
}

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

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

.case-grid article {
  display: flex;
  flex-direction: column;
}

.case-grid .case-date {
  margin: 0 0 16px;
  color: var(--orange-dark);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.35;
}

.case-category + .case-category {
  margin-top: 42px;
}

.case-category > h3 {
  display: inline-block;
  margin-bottom: 16px;
  padding-bottom: 7px;
  color: var(--orange-dark);
  border-bottom: 3px solid var(--orange);
}

.brand-grid article {
  min-height: 88px;
  align-items: center;
  justify-content: center;
  border-top: 3px solid var(--green);
  box-shadow: none;
}

.brand-grid h4 {
  margin: 0;
  font-size: 19px;
  line-height: 1.35;
  text-align: center;
}

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

blockquote {
  margin: 0;
  min-height: 150px;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 980px;
}

details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 18px 22px;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

details[open] { border-left: 4px solid var(--orange); }

details p {
  margin: 12px 0 0;
  color: var(--muted);
}

details ul {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding-left: 22px;
  color: var(--muted);
}

details strong {
  color: var(--ink);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  gap: 32px;
  padding: clamp(56px, 8vw, 92px) clamp(20px, 5vw, 72px);
  color: var(--white);
  background: var(--green-deep);
}

.contact h2 { color: var(--white); }
.contact .eyebrow { color: #ffb37a; }
.contact p { max-width: 760px; color: rgba(255,255,255,0.75); }

address {
  display: grid;
  gap: 12px;
  padding: 24px;
  font-style: normal;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 6px;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: var(--muted);
  background: var(--white);
}

footer a {
  color: var(--orange-dark);
  font-weight: 700;
}

@media (max-width: 980px) {
  nav { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-journey { max-width: 620px; }
  .fact-strip,
  .intro-grid,
  .industry-grid,
  .proof-grid,
  .case-grid,
  .quote-grid { grid-template-columns: repeat(2, 1fr); }
  .service-list { grid-template-columns: 1fr; }
  .timeline li,
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-header { gap: 12px; }
  .brand span { display: none; }
  .nav-cta { min-height: 40px; padding: 0 12px; font-size: 14px; }
  h1 { font-size: 42px; }
  .hero-text { font-size: 17px; }
  .hero { padding-top: 62px; }
  .hero-journey { padding: 22px; }
  .journey-card,
  .journey-result { padding: 16px; }
  .fact-strip,
  .intro-grid,
  .industry-grid,
  .proof-grid,
  .case-grid,
  .quote-grid { grid-template-columns: 1fr; }
  .service-list article { padding: 22px; }
  .fact-strip div { min-height: auto; }
  footer { flex-direction: column; }
}