:root {
  --navy: #16336f;
  --ink: #0f172a;
  --muted: #52627a;
  --line: #dbe3ef;
  --surface: #f5f8fc;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 1px 3px rgba(15, 23, 42, .1);
  backdrop-filter: blur(12px);
}

.nav-wrap {
  width: min(1280px, calc(100% - 32px));
  min-height: 80px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--navy);
  font-weight: 700;
  white-space: nowrap;
}

.brand strong {
  font-size: 30px;
  letter-spacing: 1px;
}

.brand span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  color: #4b5563;
  font-size: 16px;
}

.nav-links a {
  padding: 24px 0;
  border-bottom: 0;
  transition: color .2s ease;
}

.nav-links a:hover {
  color: var(--navy);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--navy);
  padding: 7px 11px;
  cursor: pointer;
}

.page-hero {
  background: var(--navy);
  color: var(--white);
  padding: 72px 16px 68px;
}

.page-hero-inner {
  width: min(960px, 100%);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 8px;
  color: #b9c9ea;
  font-size: 13px;
  letter-spacing: 2px;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.2;
  font-weight: 600;
}

.page-hero p {
  max-width: 720px;
  margin: 18px 0 0;
  color: #e6edf9;
  font-size: 17px;
}

.page-main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 76px;
}

.section-heading {
  margin: 0 0 24px;
  font-size: 26px;
  line-height: 1.3;
}

.section-lead {
  margin: -12px 0 28px;
  color: var(--muted);
}

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

.content-card,
.faq-item,
.process-step {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 24px;
}

.content-card h2,
.content-card h3,
.faq-item h2,
.process-step h2 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.4;
}

.content-card p,
.faq-item p,
.process-step p {
  margin: 0;
  color: var(--muted);
}

.content-card ul,
.process-step ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.tag {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--navy);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
}

.case-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.case-link {
  display: block;
  min-height: 112px;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.case-link:hover {
  border-color: #91a9d2;
  box-shadow: 0 10px 24px rgba(22, 51, 111, .08);
  transform: translateY(-2px);
}

.case-link strong {
  display: block;
  margin-bottom: 4px;
  font-size: 17px;
}

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

.steps {
  display: grid;
  gap: 14px;
  counter-reset: steps;
}

.process-step {
  position: relative;
  padding-left: 78px;
}

.process-step::before {
  position: absolute;
  top: 22px;
  left: 24px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  content: counter(steps);
  counter-increment: steps;
  font-weight: 700;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item h2 {
  color: var(--navy);
  font-size: 19px;
}

.notice {
  margin-top: 28px;
  padding: 18px 20px;
  border-left: 3px solid var(--navy);
  background: #eaf0fb;
  color: #2f405c;
}

.cta {
  display: inline-flex;
  align-items: center;
  margin-top: 30px;
  padding: 11px 18px;
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
}

.cta:hover {
  background: #102754;
}

.site-footer {
  padding: 30px 16px;
  background: var(--ink);
  color: #cbd5e1;
  font-size: 13px;
}

.footer-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

@media (max-width: 760px) {
  .nav-wrap {
    min-height: 64px;
  }

  .menu-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    display: none;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px 14px;
    background: var(--white);
    border-bottom: 1px solid var(--line);
  }

  .nav-links.open {
    display: grid;
  }

  .nav-links a {
    padding: 10px 0;
  }

  .content-grid,
  .case-list {
    grid-template-columns: 1fr;
  }

  .page-hero {
    padding: 52px 16px 48px;
  }

  .page-main {
    padding: 40px 0 56px;
  }

  .footer-inner {
    display: grid;
  }
}