:root {
  --bg: #f7faf9;
  --panel: #ffffff;
  --text: #17211f;
  --muted: #61706b;
  --line: #dce7e3;
  --green: #16a36a;
  --green-dark: #0f7d54;
  --cyan: #0c8fa3;
  --ink: #0d1412;
  --shadow: 0 18px 45px rgba(15, 47, 39, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  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;
  padding: 14px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(220, 231, 227, 0.8);
  background: rgba(247, 250, 249, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  font-size: 14px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a:hover {
  color: var(--green-dark);
}

.hero {
  position: relative;
  min-height: min(720px, calc(100vh - 68px));
  display: grid;
  align-items: center;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(247, 250, 249, 0.98) 0%, rgba(247, 250, 249, 0.9) 32%, rgba(247, 250, 249, 0.42) 61%, rgba(247, 250, 249, 0.08) 100%);
}

.hero-content {
  position: relative;
  max-width: 680px;
  padding: clamp(58px, 10vw, 116px) clamp(18px, 6vw, 72px);
}

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

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

h1 {
  max-width: 10em;
  margin-bottom: 22px;
  color: var(--ink);
  font-size: clamp(44px, 7vw, 84px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 620px;
  color: #33443f;
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.hero-banner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(18px, 5vw, 64px) 0;
}

.banner-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(15, 47, 39, 0.1);
}

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 22px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
  background: var(--green);
  color: #ffffff;
  box-shadow: 0 12px 26px rgba(22, 163, 106, 0.26);
}

.btn-secondary {
  border: 1px solid rgba(23, 33, 31, 0.16);
  background: rgba(255, 255, 255, 0.76);
  color: var(--ink);
}

.section {
  padding: clamp(54px, 8vw, 96px) clamp(18px, 5vw, 64px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading.compact {
  margin-bottom: 22px;
}

.section h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.15;
  letter-spacing: 0;
}

.section-heading p,
.split > div p,
.platform-item p,
.article-card span,
.text-columns p,
.process-item p,
.check-item p,
.scenario-row p,
.steps p,
.faq p {
  color: var(--muted);
}

.quick-links {
  background: #ffffff;
}

.content-band {
  background: #f1f7f5;
}

.text-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 4vw, 42px);
  max-width: 1120px;
}

.text-columns p {
  margin-bottom: 0;
  font-size: 17px;
}

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

.link-card,
.article-card,
.platform-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 1px 0 rgba(15, 47, 39, 0.04);
}

.link-card {
  display: grid;
  gap: 10px;
  padding: 22px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.link-card:hover,
.article-card:hover {
  transform: translateY(-3px);
  border-color: rgba(22, 163, 106, 0.42);
  box-shadow: var(--shadow);
}

.link-icon,
.platform-tag {
  display: inline-grid;
  min-width: 48px;
  width: max-content;
  min-height: 32px;
  place-items: center;
  border-radius: 8px;
  padding: 0 10px;
  background: #eaf8f3;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
}

.link-card strong {
  font-size: 19px;
}

.link-card span:last-child {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
}

.process-section {
  background: #ffffff;
}

.process-list {
  display: grid;
  gap: 16px;
  max-width: 1060px;
}

.process-item {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 18px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: linear-gradient(90deg, #ffffff 0%, #f8fcfb 100%);
}

.process-item > span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  font-weight: 900;
}

.process-item h3,
.check-item h3 {
  margin-bottom: 6px;
  font-size: 20px;
  line-height: 1.3;
}

.process-item p,
.check-item p,
.scenario-row p {
  margin-bottom: 0;
}

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

.steps li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 18px;
  align-items: start;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.steps li > span {
  color: var(--green-dark);
  font-weight: 900;
}

.steps strong {
  display: block;
  margin-bottom: 4px;
  font-size: 18px;
}

.steps p {
  margin-bottom: 0;
}

.platform-band {
  background: #eef6f4;
}

.platform-item,
.article-card,
.check-item {
  padding: 22px;
}

.platform-item h3,
.article-card h3 {
  margin: 14px 0 8px;
  font-size: 21px;
  line-height: 1.25;
}

.article-card p {
  margin-bottom: 10px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
}

.article-card a:hover {
  color: var(--green-dark);
}

.check-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.check-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.scenario-band {
  background: #ffffff;
}

.scenario-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.scenario-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.35fr) minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.scenario-row strong {
  color: var(--ink);
  font-size: 18px;
}

.scenario-row a {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 14px;
  background: #eaf8f3;
  color: var(--green-dark);
  font-weight: 800;
  white-space: nowrap;
}

.faq {
  background: #ffffff;
}

details {
  max-width: 920px;
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

details:last-child {
  border-bottom: 1px solid var(--line);
}

summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 800;
}

details p {
  margin: 12px 0 0;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  padding: 26px clamp(18px, 5vw, 64px);
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: #ffffff;
  font-weight: 800;
}

.article-layout {
  max-width: 940px;
  margin: 0 auto;
  padding: clamp(40px, 7vw, 80px) clamp(18px, 5vw, 36px);
}

.article-layout h1 {
  max-width: 920px;
  font-size: clamp(36px, 6vw, 64px);
}

.article-meta {
  color: var(--muted);
}

.article-body {
  margin-top: 34px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}

.article-body h2 {
  margin-top: 34px;
  font-size: clamp(24px, 3vw, 34px);
}

.article-body a {
  color: var(--green-dark);
  font-weight: 800;
}

.note-box {
  margin: 28px 0;
  border-left: 4px solid var(--green);
  border-radius: 8px;
  padding: 18px 20px;
  background: #effbf6;
}

.article-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
  }

  .hero-image {
    opacity: 0.46;
  }

  .hero-overlay {
    background: rgba(247, 250, 249, 0.86);
  }

  .link-grid,
  .platform-grid,
  .article-grid,
  .check-grid,
  .text-columns,
  .split {
    grid-template-columns: 1fr;
  }

  .scenario-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 520px) {
  .site-nav {
    gap: 10px 14px;
  }

  .hero-actions,
  .article-nav {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .steps li {
    grid-template-columns: 1fr;
  }

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