* {
  box-sizing: border-box;
}

:root {
  --text: #172033;
  --muted: #667085;
  --line: #e8edf4;
  --soft: #f7f9fc;
  --blue: #1f6feb;
  --green: #00a88f;
  --dark: #111827;
  --white: #ffffff;
  --shadow: 0 20px 60px rgba(16, 24, 40, 0.08);
  --radius: 24px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
}

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

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--green));
  font-size: 15px;
  letter-spacing: -0.03em;
}

.logo-text {
  font-size: 18px;
}

.menu {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #475467;
  font-size: 15px;
}

.menu a {
  transition: color 0.2s ease;
}

.menu a:hover {
  color: var(--blue);
}

.menu-cta {
  padding: 9px 16px;
  border-radius: 999px;
  color: var(--white) !important;
  background: var(--dark);
}

.menu-toggle {
  display: none;
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--soft);
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--text);
  border-radius: 999px;
}

.menu-button span:first-child {
  margin-top: 13px;
}

.hero {
  padding: 96px 0 90px;
  background:
    radial-gradient(circle at 12% 8%, rgba(31, 111, 235, 0.10), transparent 30%),
    radial-gradient(circle at 88% 12%, rgba(0, 168, 143, 0.10), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 82%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}

.tag {
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin-bottom: 22px;
  max-width: 780px;
  font-size: clamp(38px, 5.8vw, 64px);
  line-height: 1.12;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.3;
}

.summary {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
}

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

.hero-proof {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 34px;
}

.hero-proof div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
}

.hero-proof strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-size: 20px;
  line-height: 1.2;
}

.hero-proof span {
  color: var(--muted);
  font-size: 13px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 12px 28px rgba(31, 111, 235, 0.24);
}

.button.secondary {
  color: var(--text);
  background: var(--white);
  border-color: #d8e0ea;
}

.hero-panel {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.panel-title {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.panel-item {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.panel-item:first-of-type {
  border-top: 0;
}

.panel-item span,
.card-num {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: var(--blue);
  background: #edf5ff;
  font-weight: 900;
}

.panel-item strong {
  display: block;
  margin-bottom: 4px;
}

.panel-item p,
.card p,
.section-title p,
.solution-copy p,
.step p,
.contact-box p,
.process-line p,
.trust-copy p,
.trust-card p,
.wechat-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.section {
  padding: 88px 0;
}

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

.section-title {
  max-width: 720px;
  margin-bottom: 38px;
}

.section-title.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.trust {
  padding-top: 78px;
  padding-bottom: 78px;
}

.trust-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: center;
}

.trust-copy p {
  font-size: 18px;
}

.trust-card {
  display: grid;
  gap: 16px;
}

.trust-card > div {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--white);
  box-shadow: 0 12px 36px rgba(16, 24, 40, 0.045);
}

.trust-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 19px;
}

.cards {
  display: grid;
  gap: 20px;
}

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

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

.card {
  min-height: 260px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card-num {
  margin-bottom: 24px;
}

.card.clean {
  min-height: auto;
  background: var(--white);
}

.solution-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: start;
}

.solution-copy p {
  font-size: 18px;
}

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

.step {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--white);
}

.step > span {
  width: 12px;
  height: 12px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--green);
}

.process {
  padding-top: 40px;
}

.process-line {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.process-line > div {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--white);
}

.process-line strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.contact {
  padding-top: 40px;
}

.contact-box {
  display: grid;
  grid-template-columns: 1fr 0.86fr;
  gap: 54px;
  align-items: center;
  padding: 52px;
  border-radius: 34px;
  color: var(--white);
  background:
    radial-gradient(circle at 90% 10%, rgba(0, 168, 143, 0.22), transparent 26%),
    linear-gradient(135deg, #111827, #16345f);
}

.contact-box h2 {
  color: var(--white);
}

.contact-box .tag,
.contact-box p {
  color: rgba(255, 255, 255, 0.78);
}

.wechat-card {
  max-width: 390px;
  justify-self: end;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.10);
  text-align: center;
}

.qrcode-frame {
  width: min(250px, 100%);
  margin: 0 auto 20px;
  padding: 14px;
  border-radius: 24px;
  background: #ffffff;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.14);
}

.qrcode-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
}

.wechat-card h3 {
  margin-bottom: 8px;
  color: var(--white);
}

.wechat-card ul {
  margin: 22px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.86);
  text-align: left;
}

.wechat-card li {
  position: relative;
  margin-bottom: 8px;
  padding-left: 18px;
}

.wechat-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.wechat-card .note {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.footer {
  padding: 28px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 1020px) {
  .hero-inner,
  .solution-grid,
  .contact-box,
  .trust-grid {
    grid-template-columns: 1fr;
  }

  .cards.four,
  .process-line {
    grid-template-columns: repeat(2, 1fr);
  }

  .cards.three,
  .hero-proof {
    grid-template-columns: 1fr;
  }

  .wechat-card {
    justify-self: start;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .nav {
    height: 68px;
  }

  .logo-text {
    font-size: 16px;
  }

  .menu-button {
    display: block;
  }

  .menu {
    position: absolute;
    left: 0;
    right: 0;
    top: 68px;
    display: grid;
    max-height: 0;
    overflow: hidden;
    gap: 0;
    padding: 0 12px;
    border: 0;
    border-radius: 18px;
    background: var(--white);
    box-shadow: none;
    transition: max-height 0.25s ease, padding 0.25s ease, border 0.25s ease, box-shadow 0.25s ease;
  }

  .menu a {
    padding: 13px 12px;
  }

  .menu-toggle:checked ~ .menu {
    max-height: 320px;
    padding: 12px;
    border: 1px solid var(--line);
    box-shadow: 0 22px 52px rgba(16, 24, 40, 0.12);
  }

  .menu-cta {
    text-align: center;
    margin-top: 8px;
  }

  .hero {
    padding: 64px 0;
  }

  .hero-inner {
    gap: 36px;
  }

  .section {
    padding: 64px 0;
  }

  .cards.four,
  .process-line {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: auto;
  }

  .hero-panel,
  .contact-box {
    padding: 28px 22px;
    border-radius: 26px;
  }

  .panel-item {
    grid-template-columns: 1fr;
  }

  .panel-item span {
    width: 38px;
    height: 38px;
  }

  .wechat-card {
    max-width: none;
    width: 100%;
    justify-self: stretch;
  }

  .qrcode-frame {
    width: min(230px, 100%);
  }
}