:root {
  --green: #123f2c;
  --green-2: #1f5b42;
  --black: #101312;
  --gray: #5b6460;
  --line: #dde5df;
  --soft: #f5f8f5;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(16, 19, 18, 0.1);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--black);
  background: var(--white);
  font-family: Arial, "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.55;
}

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

img {
  display: block;
  max-width: 100%;
}

.container {
  width: min(1140px, calc(100% - 36px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(14px);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--green);
  color: var(--white);
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  color: var(--black);
  font-size: 18px;
  line-height: 1.05;
  font-weight: 900;
}

.brand small {
  color: var(--gray);
  margin-top: 3px;
  font-size: 11px;
  line-height: 1.1;
  font-weight: 600;
}

.nav-links,
.nav-actions {
  display: none;
}

.nav-links {
  align-items: center;
  gap: 24px;
  color: var(--gray);
  font-size: 14px;
  font-weight: 700;
}

.nav-actions {
  gap: 10px;
}

.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid var(--green);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  text-align: center;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(16, 19, 18, 0.12);
}

.btn-primary {
  background: var(--green);
  color: var(--white);
}

.btn-outline {
  background: var(--white);
  color: var(--green);
}

.btn-light {
  border-color: var(--white);
  background: var(--white);
  color: var(--green);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.7);
  background: transparent;
  color: var(--white);
}

.hero {
  padding: 56px 0 34px;
}

.hero-grid {
  display: grid;
  gap: 34px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 14px;
  font-size: clamp(42px, 8vw, 78px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 22px;
  line-height: 1.18;
}

.cn {
  color: var(--gray);
  font-size: 15px;
}

.cn-title {
  display: block;
  margin-top: 4px;
  color: var(--gray);
  font-size: 15px;
  font-weight: 700;
}

.headline-cn {
  margin-bottom: 16px;
  color: var(--green);
  font-size: clamp(15px, 2.6vw, 18px);
  line-height: 1.35;
  font-weight: 700;
}

.lead {
  max-width: 690px;
  color: #343b38;
  font-size: clamp(18px, 2.8vw, 21px);
  font-weight: 650;
}

.support {
  max-width: 690px;
  margin-bottom: 26px;
  color: var(--gray);
  font-size: 14px;
  line-height: 1.6;
}

.section-note {
  max-width: 760px;
  color: var(--gray);
  font-size: 16px;
}

.actions {
  display: grid;
  gap: 12px;
}

.hero-media {
  position: relative;
  margin-bottom: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  height: clamp(320px, 48vw, 560px);
  object-fit: cover;
}

.hero-media figcaption {
  position: absolute;
  right: 16px;
  bottom: 16px;
  left: 16px;
  padding: 14px 16px;
  border-left: 4px solid var(--white);
  background: rgba(16, 19, 18, 0.72);
  color: var(--white);
}

.hero-media figcaption strong,
.hero-media figcaption span {
  display: block;
}

.hero-media figcaption strong {
  font-size: 15px;
  line-height: 1.25;
}

.hero-media figcaption .cn {
  color: rgba(255, 255, 255, 0.82);
  margin-top: 4px;
  font-size: 13px;
}

.trust-bar {
  background: var(--green);
  color: var(--white);
}

.trust-grid {
  display: grid;
  gap: 10px;
  padding: 18px 0;
}

.trust-grid span {
  padding-left: 18px;
  position: relative;
  font-size: 14px;
  font-weight: 800;
}

.trust-grid span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--white);
}

.section {
  padding: 66px 0;
}

.section-head {
  max-width: 780px;
  margin-bottom: 28px;
}

.section-head.narrow {
  max-width: 680px;
}

.cards {
  display: grid;
  gap: 18px;
}

.card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 10px 30px rgba(16, 19, 18, 0.04);
}

.card img,
.process-step img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--soft);
}

.card-body {
  padding: 20px;
}

.card-kicker {
  margin-bottom: 10px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card p {
  color: var(--gray);
}

.caption {
  margin-bottom: 4px;
  color: var(--black) !important;
  font-size: 14px;
  font-weight: 800;
}

.process {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.process-grid {
  display: grid;
  gap: 16px;
}

.process-step {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.process-step div {
  padding: 20px;
}

.step-number {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.why {
  background: var(--black);
  color: var(--white);
}

.why .eyebrow {
  color: #9bd3ad;
}

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

.why-grid {
  display: grid;
  gap: 28px;
}

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

.why-list article {
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
}

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

.faq-grid {
  display: grid;
  gap: 28px;
}

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 0 18px;
}

details + details {
  margin-top: 12px;
}

summary {
  cursor: pointer;
  padding: 18px 0;
  color: var(--black);
  font-weight: 800;
}

details p {
  margin-bottom: 18px;
  color: var(--gray);
}

.final-cta {
  text-align: center;
}

.cta-panel {
  padding: 40px 20px;
  border-radius: var(--radius);
  background: var(--green);
  color: var(--white);
}

.cta-panel .eyebrow,
.cta-panel p {
  color: rgba(255, 255, 255, 0.78);
}

.cta-panel .cta-cn {
  margin-bottom: 10px;
}

.center {
  max-width: 680px;
  margin: 24px auto 0;
}

.footer {
  padding: 30px 0 92px;
  border-top: 1px solid var(--line);
  color: var(--gray);
  font-size: 14px;
}

.footer strong {
  color: var(--black);
  font-size: 18px;
}

.footer-grid {
  display: grid;
  gap: 12px;
}

.footer p {
  margin-bottom: 0;
}

.mobile-sticky {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 60;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 10px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.mobile-sticky .btn {
  min-height: 50px;
}

@media (min-width: 700px) {
  .actions {
    display: flex;
    flex-wrap: wrap;
  }

  .trust-grid,
  .cards,
  .process-grid,
  .why-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.15fr 1fr 0.8fr 1.1fr 0.85fr;
    align-items: start;
  }
}

@media (min-width: 980px) {
  .nav-links,
  .nav-actions {
    display: flex;
  }

  .hero {
    padding: 84px 0 48px;
  }

  .hero-grid {
    grid-template-columns: 1fr 0.95fr;
  }

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

  .section {
    padding: 86px 0;
  }

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

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

  .why-grid,
  .faq-grid {
    grid-template-columns: 0.82fr 1.18fr;
  }

  .mobile-sticky {
    display: none;
  }

  .footer {
    padding-bottom: 34px;
  }
}