:root {
  --primary: #129785;
  --primary-dark: #0b6f64;
  --primary-soft: #e8f7f4;
  --accent: #2457c5;
  --ink: #102033;
  --text: #37485c;
  --muted: #6b7a8d;
  --line: #d8e1e8;
  --light: #f6fafb;
  --panel: #ffffff;
  --warning: #fff7e6;
  --shadow: 0 18px 44px rgba(16, 32, 51, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.72;
  overflow-x: hidden;
}

a {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 20;
  padding: 10px 14px;
  color: #fff;
  background: var(--primary-dark);
  border-radius: 8px;
}

.skip-link:focus {
  top: 14px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(216, 225, 232, 0.9);
}

.header-inner {
  width: min(1160px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-logo,
.site-logo img {
  display: block;
}

.site-logo img {
  max-height: 42px;
  width: auto;
  object-fit: contain;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  background: var(--light);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.top-nav a {
  padding: 7px 14px;
  color: var(--text);
  text-decoration: none;
  border-radius: 999px;
  font-size: 14px;
}

.top-nav a:hover {
  color: var(--primary-dark);
  background: #fff;
}

.main-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.main-btn {
  color: #fff;
  background: var(--primary);
  border: 1px solid var(--primary);
  box-shadow: 0 10px 24px rgba(18, 151, 133, 0.22);
}

.main-btn:hover {
  color: #fff;
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.secondary-btn {
  color: var(--primary-dark);
  background: #fff;
  border: 1px solid var(--line);
}

.secondary-btn:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-2px);
}

.container {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  padding: 80px 0 72px;
  background:
    linear-gradient(135deg, rgba(232, 247, 244, 0.94), rgba(255, 255, 255, 0.92) 52%, rgba(240, 246, 255, 0.95)),
    radial-gradient(circle at 82% 20%, rgba(36, 87, 197, 0.12), transparent 32%);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 58px;
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  margin-bottom: 12px;
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--ink);
  line-height: 1.25;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(36px, 5vw, 60px);
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 3vw, 40px);
}

h3 {
  font-size: 21px;
}

p {
  margin: 0 0 1em;
}

.lead {
  color: var(--muted);
  font-size: 18px;
}

.hero-copy .lead {
  color: var(--text);
  font-size: 21px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.trust-strip span {
  padding: 9px 13px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 10% 12%;
  background: linear-gradient(160deg, rgba(18, 151, 133, 0.18), rgba(36, 87, 197, 0.13));
  border-radius: 32px;
  transform: rotate(-5deg);
}

.hero-visual img {
  position: relative;
  width: min(100%, 470px);
  filter: drop-shadow(0 26px 36px rgba(16, 32, 51, 0.16));
}

.section {
  padding: 88px 0;
}

.section-muted {
  background: var(--light);
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 42px;
  text-align: center;
}

.intro-panel {
  padding-top: 62px;
}

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

.feature-card,
.process-card,
.category-card,
.faq-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.feature-card {
  padding: 24px;
}

.feature-card strong {
  display: block;
  margin-bottom: 9px;
  color: var(--ink);
  font-size: 18px;
}

.feature-card p,
.process-card p,
.split-copy p,
.faq-card p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 58px;
}

.split.reverse .split-media {
  order: 2;
}

.split-media img {
  display: block;
  width: 100%;
  max-height: 430px;
  object-fit: contain;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.process-card {
  padding: 28px;
}

.process-card span {
  display: inline-grid;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  place-items: center;
  color: #fff;
  background: var(--primary);
  border-radius: 50%;
  font-weight: 800;
}

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

.category-card {
  display: grid;
  gap: 8px;
  min-height: 128px;
  padding: 24px;
  color: var(--text);
  text-decoration: none;
}

.category-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.category-card strong {
  color: var(--primary-dark);
  font-size: 18px;
}

.category-card span {
  color: var(--muted);
}

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

.faq-card {
  overflow: hidden;
}

.faq-card summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.faq-card summary::after {
  content: "+";
  color: var(--primary);
  font-size: 24px;
  line-height: 1;
}

.faq-card[open] summary::after {
  content: "-";
}

.faq-card p {
  margin: 0;
  padding: 0 24px 22px;
}

.final-cta {
  padding-top: 72px;
}

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 38px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary-dark), var(--accent));
  border-radius: 10px;
}

.cta-band h2,
.cta-band p,
.cta-band .eyebrow {
  color: #fff;
}

.cta-band .secondary-btn {
  color: #fff;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.72);
}

.cta-band .secondary-btn:hover {
  background: rgba(255, 255, 255, 0.14);
}

.site-footer {
  color: rgba(255, 255, 255, 0.88);
  background: #102033;
}

.footer-inner {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  padding: 50px 0 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
}

.footer-inner img {
  display: block;
  max-height: 42px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer-inner p {
  margin-top: 18px;
}

.footer-risk {
  padding: 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
}

.footer-bottom {
  padding: 18px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 14px;
}

@media (max-width: 1040px) {
  .top-nav {
    display: none;
  }

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

  .split.reverse .split-media {
    order: 0;
  }

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

@media (max-width: 760px) {
  .header-inner {
    width: min(100% - 28px, 1160px);
    min-height: 64px;
  }

  .site-logo img {
    max-width: 130px;
  }

  .header-download {
    padding: 0 14px;
    font-size: 14px;
  }

  .container {
    width: min(100% - 32px, 1160px);
  }

  .hero {
    padding: 48px 0 56px;
  }

  .section {
    padding: 62px 0;
  }

  h1 {
    font-size: 36px;
  }

  .hero-copy .lead {
    font-size: 18px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions a {
    width: 100%;
  }

  .feature-grid,
  .process-grid,
  .category-grid,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .cta-band {
    align-items: stretch;
    flex-direction: column;
    padding: 28px;
  }
}

@media (max-width: 420px) {
  h1 {
    font-size: 32px;
  }

  .header-download {
    min-height: 40px;
    padding: 0 10px;
  }
}