:root {
  --ink: #19160a;
  --gold: #A78758;
  --paper: #f7f1e5;
  --paper-deep: #eee2cf;
  --mist: #d8d2c0;
  --pine: #263d31;
  --cinnabar: #8f3d2b;
  --white: #fffaf1;
  --shadow: 0 18px 45px rgba(25, 22, 10, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 18%, rgba(167, 135, 88, 0.18), transparent 28%),
    linear-gradient(120deg, rgba(255, 250, 241, 0.82), rgba(247, 241, 229, 0.96)),
    var(--paper);
  font-family: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  line-height: 1.7;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(25, 22, 10, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 22, 10, 0.025) 1px, transparent 1px);
  background-size: 34px 34px;
}

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

img {
  max-width: 100%;
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(247, 241, 229, 0.88);
  border-bottom: 1px solid rgba(167, 135, 88, 0.24);
  backdrop-filter: blur(18px);
}

.brand img {
  width: 176px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: rgba(25, 22, 10, 0.76);
  font-size: 15px;
}

.site-nav a {
  position: relative;
  padding: 6px 0;
}

.site-nav a::after {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  content: "";
  background: var(--gold);
  transition: width 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 1px solid rgba(167, 135, 88, 0.36);
  border-radius: 4px;
  background: rgba(255, 250, 241, 0.76);
}

.nav-toggle span {
  display: block;
  height: 1px;
  margin: 6px 0;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: calc(100vh - 82px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  align-items: end;
  gap: 44px;
  padding: clamp(72px, 10vw, 128px) clamp(20px, 6vw, 88px) 68px;
  overflow: hidden;
  border-bottom: 1px solid rgba(167, 135, 88, 0.22);
}

.hero::before {
  position: absolute;
  right: -14vw;
  bottom: -16vw;
  width: min(720px, 70vw);
  aspect-ratio: 1;
  content: "";
  border-radius: 50%;
  border: 1px solid rgba(167, 135, 88, 0.28);
  background:
    radial-gradient(circle, rgba(255, 250, 241, 0.08) 0 35%, transparent 36%),
    conic-gradient(from 20deg, rgba(38, 61, 49, 0.2), rgba(167, 135, 88, 0.22), rgba(143, 61, 43, 0.14), rgba(38, 61, 49, 0.2));
}

.hero-ink {
  position: absolute;
  left: 48%;
  top: 16%;
  width: 38vw;
  min-width: 360px;
  max-width: 620px;
  aspect-ratio: 1.35;
  opacity: 0.2;
  background:
    linear-gradient(152deg, transparent 0 18%, rgba(38, 61, 49, 0.7) 19% 21%, transparent 22%),
    linear-gradient(166deg, transparent 0 32%, rgba(25, 22, 10, 0.65) 33% 36%, transparent 37%),
    linear-gradient(18deg, transparent 0 40%, rgba(167, 135, 88, 0.72) 41% 43%, transparent 44%);
  clip-path: polygon(0 58%, 18% 46%, 32% 52%, 46% 30%, 58% 48%, 70% 20%, 100% 70%, 100% 100%, 0 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.hero-title-line {
  display: inline;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 14px;
  letter-spacing: 0;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(46px, 7vw, 86px);
  font-weight: 500;
  line-height: 1.08;
}

h2 {
  font-size: clamp(30px, 4vw, 50px);
  font-weight: 500;
  line-height: 1.22;
}

h3 {
  font-size: 24px;
  font-weight: 500;
}

.hero-copy {
  max-width: 660px;
  margin-bottom: 34px;
  color: rgba(25, 22, 10, 0.72);
  font-size: 18px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 24px;
  border: 1px solid var(--gold);
  border-radius: 4px;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(25, 22, 10, 0.12);
}

.primary {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.secondary {
  background: rgba(255, 250, 241, 0.56);
}

.hero-card {
  position: relative;
  z-index: 1;
  align-self: center;
  padding: 28px;
  color: var(--white);
  background: linear-gradient(160deg, var(--pine), #1d2b23);
  border: 1px solid rgba(255, 250, 241, 0.22);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.hero-card span {
  color: rgba(255, 250, 241, 0.66);
  font-size: 14px;
}

.hero-card strong {
  display: block;
  margin: 12px 0;
  font-size: 30px;
  font-weight: 500;
}

.section {
  padding: 86px clamp(20px, 6vw, 88px);
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.75fr);
  gap: 52px;
  align-items: center;
}

.intro p:last-child {
  color: rgba(25, 22, 10, 0.7);
  font-size: 18px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 36px;
}

.course-grid,
.pricing-grid,
.testimonial-grid {
  display: grid;
  gap: 18px;
}

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

.course-card,
.price-card,
blockquote {
  border: 1px solid rgba(167, 135, 88, 0.28);
  border-radius: 6px;
  background: rgba(255, 250, 241, 0.7);
  box-shadow: 0 12px 28px rgba(25, 22, 10, 0.06);
}

.course-card {
  min-height: 270px;
  padding: 28px;
}

.course-card span {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 28px;
  place-items: center;
  color: var(--white);
  background: var(--gold);
  border-radius: 50%;
}

.course-card p,
.method-list p,
.price-card li,
blockquote {
  color: rgba(25, 22, 10, 0.68);
}

.method {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.75fr);
  gap: 24px;
  padding: 80px clamp(20px, 6vw, 88px);
  background: linear-gradient(135deg, rgba(38, 61, 49, 0.08), rgba(167, 135, 88, 0.13));
  border-block: 1px solid rgba(167, 135, 88, 0.22);
}

.method-panel,
.quote-panel {
  padding: clamp(28px, 5vw, 56px);
  border-radius: 6px;
}

.method-panel {
  background: rgba(255, 250, 241, 0.62);
}

.method-list {
  display: grid;
  gap: 22px;
  margin-top: 34px;
}

.method-list div {
  padding-left: 20px;
  border-left: 2px solid var(--gold);
}

.method-list strong {
  font-size: 20px;
  font-weight: 500;
}

.quote-panel {
  display: flex;
  min-height: 420px;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--white);
  background:
    linear-gradient(rgba(25, 22, 10, 0.2), rgba(25, 22, 10, 0.48)),
    linear-gradient(135deg, var(--cinnabar), var(--pine));
  box-shadow: var(--shadow);
}

.quote-panel p {
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.35;
}

.quote-panel span {
  color: rgba(255, 250, 241, 0.72);
}

.pricing-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.price-card {
  padding: 30px;
}

.price-card.featured {
  color: var(--white);
  background: var(--ink);
  transform: translateY(-10px);
}

.price {
  margin: 12px 0 24px;
  color: var(--gold);
  font-size: 42px;
}

.price-card ul {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0 0 30px;
  list-style: none;
}

.price-card li::before {
  margin-right: 9px;
  color: var(--gold);
  content: "·";
}

.price-card.featured li {
  color: rgba(255, 250, 241, 0.72);
}

.price-card a {
  display: inline-flex;
  padding: 9px 18px;
  border: 1px solid currentColor;
  border-radius: 4px;
}

.testimonial-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

blockquote {
  margin: 0;
  padding: 32px;
  font-size: 18px;
}

cite {
  display: block;
  margin-top: 18px;
  color: var(--gold);
  font-style: normal;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 0.8fr);
  gap: 46px;
  padding: 86px clamp(20px, 6vw, 88px);
  background: rgba(255, 250, 241, 0.42);
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 30px;
  border: 1px solid rgba(167, 135, 88, 0.28);
  border-radius: 6px;
  background: rgba(255, 250, 241, 0.78);
}

label {
  display: grid;
  gap: 8px;
  color: rgba(25, 22, 10, 0.72);
}

input,
select {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid rgba(167, 135, 88, 0.35);
  border-radius: 4px;
  background: var(--white);
  font: inherit;
}

input:focus,
select:focus {
  outline: 2px solid rgba(167, 135, 88, 0.28);
  border-color: var(--gold);
}

.form-note {
  min-height: 26px;
  margin: 0;
  color: var(--pine);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 6vw, 88px);
  border-top: 1px solid rgba(167, 135, 88, 0.24);
}

.site-footer img {
  width: 142px;
}

.site-footer p {
  margin: 0;
  color: rgba(25, 22, 10, 0.6);
}

@media (min-width: 721px) {
  .hero {
    align-items: center;
    padding-top: clamp(64px, 8vw, 96px);
    padding-bottom: clamp(56px, 7vw, 82px);
  }

  h1 {
    max-width: 720px;
    font-size: clamp(44px, 4.6vw, 58px);
    line-height: 1.16;
  }

  .hero-title-line {
    display: block;
  }

  .hero-copy {
    max-width: 700px;
  }

  .hero-card {
    max-width: 420px;
  }
}

@media (min-width: 981px) {
  .hero {
    grid-template-columns: minmax(520px, 720px) minmax(320px, 360px);
    gap: clamp(36px, 5vw, 72px);
    justify-content: space-between;
  }

  .hero-content {
    align-self: center;
    max-width: 720px;
  }

  .hero-card {
    align-self: center;
    width: 100%;
    padding: 34px;
  }

  .hero-card strong {
    font-size: 32px;
  }
}

@media (max-width: 980px) {
  .hero,
  .intro,
  .method,
  .contact {
    grid-template-columns: 1fr;
  }

  .course-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .price-card.featured {
    transform: none;
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: 14px 18px;
  }

  .brand img {
    width: 148px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    left: 18px;
    right: 18px;
    top: 72px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid rgba(167, 135, 88, 0.26);
    border-radius: 6px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

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

  .hero {
    min-height: auto;
    padding-top: 64px;
  }

  .hero-ink {
    left: 24%;
    top: 12%;
  }

  .course-grid,
  .pricing-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .course-card {
    min-height: auto;
  }

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