* {
  box-sizing: border-box;
}

:root {
  --bg: #f7f3ec;
  --paper: #fffdf8;
  --paper-strong: #ffffff;
  --ink: #251b17;
  --muted: #6f6259;
  --subtle: #8b7b70;
  --line: #e5d8c5;
  --line-strong: #d4bea1;
  --green: #586f3a;
  --green-dark: #30441f;
  --rust: #b9541c;
  --rust-dark: #873a16;
  --blue: #315f7b;
  --shadow: 0 22px 54px rgba(69, 48, 32, 0.12);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(120, 89, 50, 0.05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(120, 89, 50, 0.04) 1px, transparent 1px),
    var(--bg);
  background-size: 28px 28px;
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

a {
  color: inherit;
}

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

h1,
h2,
h3 {
  letter-spacing: 0;
}

h1 {
  max-width: 920px;
  color: var(--ink);
  font-family: "Songti SC", "STSong", "PingFang SC", serif;
  font-size: clamp(36px, 4.2vw, 58px);
  line-height: 1.06;
}

h2 {
  color: var(--ink);
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.18;
}

h3 {
  color: var(--ink);
  font-size: 19px;
  line-height: 1.35;
}

p,
li {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.78;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(212, 190, 161, 0.78);
  background: rgba(255, 253, 248, 0.92);
  backdrop-filter: blur(16px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1440px, calc(100% - 48px));
  min-height: 68px;
  margin: 0 auto;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff8ec;
  font-size: 14px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 850;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a {
  color: #67594e;
}

.nav-links a:hover {
  background: #f1e8da;
  color: var(--rust-dark);
}

.button {
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--rust);
  color: #fff;
  box-shadow: 0 12px 24px rgba(185, 84, 28, 0.18);
}

.button-primary:hover {
  background: var(--rust-dark);
}

.button-secondary {
  border-color: var(--line-strong);
  background: var(--paper-strong);
  color: #5d3c2a;
}

.page {
  width: min(1440px, calc(100% - 48px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
  padding: 68px 0 50px;
}

.hero-copy {
  display: grid;
  max-width: 980px;
  gap: 18px;
}

.eyebrow,
.mini-kicker {
  width: fit-content;
  padding: 6px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff9ef;
  color: var(--rust-dark);
  font-size: 13px;
  font-weight: 900;
}

.hero-copy > p {
  max-width: 680px;
  color: #5d5149;
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 2px;
}

.proofs,
.topic-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.proofs span,
.topic-links a {
  min-height: 34px;
  padding: 7px 11px;
  border: 1px solid #ded0ba;
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.86);
  color: #51463f;
  font-size: 13px;
  font-weight: 850;
  text-decoration: none;
}

.media-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-strong);
  box-shadow: var(--shadow);
}

.media-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.media-zoom-link {
  display: block;
  cursor: zoom-in;
}

.media-frame.featured img {
  object-position: top center;
}

.media-caption {
  padding: 14px 16px;
  border-top: 1px solid var(--line);
  color: var(--subtle);
  font-size: 14px;
  font-weight: 800;
}

.media-stack {
  display: grid;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  gap: 14px;
}

.hero-card {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 253, 248, 0.92);
  box-shadow: 0 12px 28px rgba(69, 48, 32, 0.08);
}

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

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  display: grid;
  gap: 4px;
  min-height: 82px;
  padding: 12px;
  border: 1px solid #eadfce;
  border-radius: 8px;
  background: #fffaf1;
}

.stat b {
  color: var(--rust-dark);
  font-size: 24px;
  line-height: 1;
}

.stat span {
  color: var(--subtle);
  font-size: 12px;
  font-weight: 800;
}

.section {
  display: grid;
  gap: 22px;
  padding: 46px 0;
  border-top: 1px solid rgba(212, 190, 161, 0.74);
}

.section-head {
  display: grid;
  max-width: 820px;
  gap: 10px;
}

.section-head.wide {
  max-width: 980px;
}

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

.feature,
.proof-card {
  display: grid;
  gap: 10px;
  min-height: 100%;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 253, 248, 0.9);
  box-shadow: 0 10px 24px rgba(69, 48, 32, 0.05);
}

.feature .tag {
  width: fit-content;
  padding: 4px 8px;
  border-radius: 999px;
  background: #eef2e6;
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 900;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: 24px;
  align-items: start;
}

.steps {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-strong);
}

.steps strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
}

.step-index {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: #e8eddd;
  color: var(--green-dark);
  font-weight: 900;
}

.image-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.image-band .media-frame {
  max-width: 1280px;
  margin: 0 auto;
}

.callout {
  display: grid;
  gap: 10px;
  padding: 20px;
  border-left: 5px solid var(--rust);
  border-radius: 10px;
  background: #fff8ed;
}

.callout h3 {
  font-size: 22px;
}

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

.faq details {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-strong);
}

.faq summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 900;
}

.faq p {
  margin-top: 10px;
}

.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 22px 0 48px;
  padding: 26px;
  border-radius: 12px;
  background: #25311d;
  color: #fff;
  box-shadow: var(--shadow);
}

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

.footer {
  padding: 24px 0 34px;
  border-top: 1px solid rgba(212, 190, 161, 0.74);
  color: var(--subtle);
  font-size: 13px;
  text-align: center;
}

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

.footer a:hover {
  color: var(--rust-dark);
  text-decoration: underline;
}

@media (max-width: 980px) {
  .nav-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 10px 0;
  }

  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero,
  .split,
  .feature-grid,
  .proof-grid,
  .image-band {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 30px 0 36px;
  }

  h1 {
    font-size: 36px;
  }

  .hero-copy > p {
    font-size: 16px;
  }

  .cta {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}

@media (max-width: 620px) {
  .page,
  .nav-inner {
    width: min(100% - 28px, 1440px);
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }
}