:root {
  --pine: #0e6b52;
  --pine-deep: #0a4f3c;
  --pine-ink: #0c2f26;
  --gold: #ffcf6b;
  --gold-deep: #d8ad4f;
  --paper: #f6f7f5;
  --paper-warm: #fbf8f2;
  --ink: #1b241f;
  --muted: #6b766f;
  --line: #dde5e0;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 16px 44px rgba(12, 47, 38, 0.1);
  --font: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.7;
}

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

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

.wrap {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 43, 34, 0.97);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--white);
  backdrop-filter: blur(12px);
}

.site-nav-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  font-size: 17px;
  font-weight: 800;
}

.brand img {
  width: auto;
  height: 34px;
}

.site-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.82);
}

.site-links a:hover,
.site-links a.active {
  color: var(--gold);
}

.nav-buy {
  flex: none;
  padding: 9px 18px;
  border-radius: var(--radius);
  background: var(--gold);
  color: var(--pine-ink);
  font-size: 14px;
  font-weight: 800;
}

.page-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 20%, rgba(255, 207, 107, 0.2), transparent 26%),
    radial-gradient(circle at 18% 83%, rgba(49, 151, 118, 0.22), transparent 32%),
    #0c2f26;
  color: var(--white);
}

.page-hero-inner {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 48px;
  align-items: center;
  padding: 72px 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: currentColor;
}

.page-hero h1 {
  max-width: 760px;
  margin-top: 16px;
  font-size: clamp(36px, 5vw, 62px);
  line-height: 1.12;
  font-weight: 900;
}

.page-hero p {
  max-width: 720px;
  margin-top: 20px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 22px;
  border: 0;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
}

.btn-primary {
  background: var(--gold);
  color: var(--pine-ink);
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
}

.btn-outline {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--pine-ink);
}

.hero-panel {
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.22);
}

.hero-panel img,
.hero-panel video {
  width: 100%;
  border-radius: 10px;
}

.section {
  padding: 82px 0;
}

.section-warm {
  background: var(--paper-warm);
}

.section-white {
  background: var(--white);
}

.section-dark {
  background: var(--pine-ink);
  color: var(--white);
}

.section-head {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-head h2 {
  margin-top: 10px;
  color: var(--pine-ink);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.25;
}

.section-dark .section-head h2 {
  color: var(--white);
}

.section-head p {
  margin-top: 12px;
  color: var(--muted);
}

.section-dark .section-head p {
  color: rgba(255, 255, 255, 0.7);
}

.video-frame {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #071b17;
  box-shadow: var(--shadow);
}

.video-frame video {
  width: 100%;
  border-radius: 9px;
  background: #071b17;
}

.video-note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 18px;
}

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

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

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

.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.card.dark {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.07);
}

.card h3 {
  color: var(--pine-ink);
  font-size: 19px;
}

.card.dark h3 {
  color: var(--white);
}

.card p {
  margin-top: 9px;
  color: var(--muted);
  font-size: 14px;
}

.card.dark p {
  color: rgba(255, 255, 255, 0.7);
}

.number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  border-radius: 8px;
  background: #e7f0ec;
  color: var(--pine);
  font-weight: 900;
}

.card.dark .number {
  background: rgba(255, 207, 107, 0.16);
  color: var(--gold);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 42px;
  align-items: center;
}

.split-media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.split-media img {
  width: 100%;
}

.check-list {
  display: grid;
  gap: 12px;
  margin-top: 22px;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  color: #42544d;
  font-size: 15px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold-deep);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.product-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.product-card-body {
  padding: 28px;
}

.product-card-body h3 {
  color: var(--pine-ink);
  font-size: 23px;
}

.product-card-body p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.product-card-body .btn {
  margin-top: 22px;
}

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.lesson {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
}

.lesson video {
  width: 100%;
  background: #071b17;
}

.lesson-copy {
  padding: 18px 20px 22px;
}

.lesson-copy h3 {
  color: var(--pine-ink);
  font-size: 17px;
}

.lesson-copy p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 880px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.faq-item summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--pine-ink);
  font-weight: 800;
}

.faq-item p {
  padding: 0 20px 18px;
  color: var(--muted);
  font-size: 14px;
}

.cta-band {
  background: var(--pine);
  color: var(--white);
}

.cta-band-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding: 54px 0;
}

.cta-band h2 {
  font-size: clamp(26px, 4vw, 40px);
}

.cta-band p {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.78);
}

.footer {
  padding: 38px 0;
  background: var(--pine-ink);
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a:hover {
  color: var(--gold);
}

.footer a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 980px) {
  .site-links {
    display: none;
  }

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

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .wrap {
    width: min(100% - 28px, 1160px);
  }

  .nav-buy {
    display: none;
  }

  .page-hero-inner {
    min-height: auto;
    padding: 54px 0 58px;
  }

  .section {
    padding: 58px 0;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .product-grid,
  .lesson-grid {
    grid-template-columns: 1fr;
  }

  .cta-band-inner {
    grid-template-columns: 1fr;
  }
}