:root {
  --ink: #25150d;
  --muted: #72594a;
  --line: #ecd6c5;
  --paper: #fffaf5;
  --panel: #ffffff;
  --brand: #f47408;
  --brand-dark: #c94d00;
  --green: #199a57;
  --gold: #ffc247;
  --shadow: 0 24px 70px rgba(103, 45, 0, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 72px;
  padding: 12px clamp(20px, 5vw, 72px);
  background: rgba(255, 250, 245, 0.9);
  border-bottom: 1px solid rgba(236, 214, 197, 0.72);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 18px;
  white-space: nowrap;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  box-shadow: 0 10px 22px rgba(244, 116, 8, 0.24);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: #5d4132;
  font-size: 15px;
}

.site-nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  isolation: isolate;
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: clamp(72px, 10vw, 118px) clamp(22px, 7vw, 96px);
  background:
    linear-gradient(90deg, rgba(255, 250, 245, 0.98) 0%, rgba(255, 250, 245, 0.88) 48%, rgba(255, 232, 207, 0.68) 100%),
    radial-gradient(circle at 82% 50%, rgba(255, 194, 71, 0.48), transparent 38%);
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 90px;
  background: linear-gradient(180deg, rgba(255, 250, 245, 0), var(--paper));
  pointer-events: none;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding-right: clamp(10px, 9vw, 140px);
  opacity: 0.2;
}

.hero-bg img {
  width: min(58vw, 680px);
  min-width: 360px;
  border-radius: 24%;
  transform: rotate(-7deg);
  filter: saturate(1.06);
}

.hero-content {
  width: min(760px, 100%);
  padding-bottom: 36px;
}

.eyebrow,
.section-kicker {
  display: inline-block;
  margin: 0 0 14px;
  color: var(--brand-dark);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0;
}

.hero h1 {
  margin: 0;
  font-size: clamp(48px, 9vw, 104px);
  line-height: 1;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 650px;
  margin: 28px 0 0;
  color: #55392a;
  font-size: clamp(18px, 2.4vw, 24px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn.primary {
  color: #fff;
  background: var(--brand);
  box-shadow: 0 16px 34px rgba(244, 116, 8, 0.28);
}

.btn.primary:hover {
  background: var(--brand-dark);
}

.btn.secondary {
  color: var(--brand-dark);
  background: rgba(255, 255, 255, 0.78);
  border-color: var(--line);
}

.btn.wide {
  width: 100%;
}

.download-note {
  max-width: 660px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(72px, 9vw, 120px) clamp(22px, 7vw, 96px);
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head.compact {
  max-width: 680px;
}

.section h2,
.download-section h2,
.support h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

.section-head p,
.download-panel p,
.support-content p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

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

.intro-grid article,
.step-grid article {
  min-height: 230px;
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 38px rgba(103, 45, 0, 0.08);
}

.number,
.step-grid strong {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 22px;
  color: var(--brand-dark);
  background: #fff0df;
  border-radius: 8px;
  font-weight: 900;
}

h3 {
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.3;
}

article p,
.benefit-item p,
.download-box p {
  margin: 0;
  color: var(--muted);
}

.benefits {
  background: #fff4e8;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.benefit-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.benefit-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  align-items: start;
  padding: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.benefit-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  color: #fff;
  background: var(--green);
  border-radius: 8px;
  font-weight: 900;
  font-size: 20px;
}

.download-section {
  padding: clamp(72px, 9vw, 120px) clamp(22px, 7vw, 96px);
  background: var(--ink);
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: clamp(24px, 6vw, 72px);
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  color: #fff;
}

.download-panel p {
  color: #f4d8c0;
}

.download-box {
  padding: 24px;
  background: #fffaf5;
  border-radius: 8px;
  text-align: center;
  box-shadow: var(--shadow);
}

.download-box img {
  display: block;
  width: 128px;
  height: 128px;
  margin: 0 auto 18px;
  border-radius: 28px;
}

.download-box p {
  margin-top: 12px;
  font-size: 14px;
}

.support {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(24px, 6vw, 72px);
  align-items: end;
}

.support-links {
  display: grid;
  gap: 12px;
}

.support-links a {
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--brand-dark);
  font-weight: 800;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(22px, 7vw, 96px);
  color: #6e5548;
  background: #fff4e8;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.site-footer div {
  display: flex;
  gap: 10px;
  align-items: center;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .site-header {
    min-height: 66px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 66px;
    left: 16px;
    right: 16px;
    display: none;
    padding: 12px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
    gap: 6px;
  }

  .site-nav a {
    padding: 12px;
  }

  .hero {
    min-height: auto;
    padding-top: 86px;
  }

  .hero-bg {
    justify-content: center;
    padding-right: 0;
    opacity: 0.13;
  }

  .hero-bg img {
    min-width: 420px;
  }

  .intro-grid,
  .benefit-list,
  .step-grid,
  .download-panel,
  .support {
    grid-template-columns: 1fr;
  }

  .download-box {
    width: min(100%, 320px);
  }

  .site-footer,
  .site-footer div {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .brand span {
    font-size: 16px;
  }

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

  .intro-grid article,
  .step-grid article,
  .benefit-item {
    padding: 22px;
  }
}