:root {
  --bg: #08090c;
  --panel: #151721;
  --panel-soft: #1d2030;
  --text: #f7f4ef;
  --muted: #c9c4bd;
  --line: rgba(255, 255, 255, 0.14);
  --copper: #e66f3e;
  --amber: #ffc56d;
  --violet: #7c67ff;
  --cyan: #62d6ff;
  --green: #87d487;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

button {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(8, 9, 12, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand,
.brand-text,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.brand-text {
  background: linear-gradient(135deg, var(--amber), var(--copper));
  font-size: clamp(20px, 2vw, 30px);
  font-weight: 900;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: #08090c;
  background: var(--text);
  border-radius: 50%;
  font-size: 18px;
}

.nav-links {
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
  margin: 0 auto;
}

.nav-links a:hover {
  color: var(--text);
}

.header-cta,
.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

.header-cta,
.primary-btn {
  color: #140d08;
  background: linear-gradient(135deg, var(--amber), var(--copper));
  font-weight: 800;
}

.secondary-btn {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--line);
}

.header-cta:hover,
.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.hero {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 84svh;
  overflow: hidden;
  padding: clamp(88px, 14vh, 150px) clamp(22px, 7vw, 92px) clamp(64px, 10vh, 110px);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--bg);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, 100%);
  margin: 0 auto;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--amber);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fffaf2 28%, var(--amber) 58%, var(--cyan) 100%);
  font-size: clamp(44px, 8vw, 86px);
  line-height: 1.04;
  letter-spacing: 0;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.hero-lead {
  max-width: 650px;
  margin: 0 auto;
  color: var(--text);
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 34px;
}

.wechat-line {
  margin: 18px 0 0;
  color: var(--muted);
}

.section {
  padding: clamp(64px, 9vw, 112px) clamp(18px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}

.section-inner {
  width: min(1160px, 100%);
  margin: 0 auto;
}

.narrow-inner {
  width: min(900px, 100%);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-heading p:not(.section-kicker) {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.feature-grid,
.comparison-grid,
.deliverable-grid,
.audience-grid {
  display: grid;
  gap: 18px;
}

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

.feature-card,
.comparison-card,
.outcome-card,
.deliverable-card,
.audience-card,
.pricing-panel {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.feature-card {
  padding: 28px;
}

.feature-card h3 {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  color: #160e08;
  background: linear-gradient(135deg, var(--amber), var(--copper));
  border-radius: 6px;
  font-size: 18px;
}

.feature-card p,
.comparison-card p,
.outcome-card p,
.audience-card p,
.timeline p,
.deliverable-card li,
.course-meta dd {
  color: var(--muted);
  line-height: 1.75;
}

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

.comparison-card {
  position: relative;
  padding: 30px;
}

.comparison-card.is-primary {
  border-color: rgba(230, 111, 62, 0.55);
}

.comparison-card h3 {
  font-size: 30px;
}

.badge {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 0 10px;
  color: #140d08;
  background: var(--amber);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
}

.comparison-item {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.comparison-item strong {
  display: block;
  margin-bottom: 6px;
}

.outcome-list {
  display: grid;
  gap: 16px;
}

.outcome-card {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  padding: 26px;
}

.outcome-card h3,
.timeline h3,
.deliverable-card h3,
.audience-card h3 {
  color: var(--text);
}

.timeline {
  display: grid;
  gap: 14px;
  counter-reset: step;
}

.timeline-item {
  position: relative;
  padding: 24px 24px 24px 72px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.timeline-item::before {
  position: absolute;
  left: 24px;
  top: 24px;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: #08090c;
  background: var(--cyan);
  border-radius: 50%;
  counter-increment: step;
  content: counter(step);
  font-size: 14px;
  font-weight: 900;
}

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

.deliverable-card {
  padding: 28px;
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  min-height: 28px;
  padding-left: 34px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 3px;
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  color: #08090c;
  background: var(--green);
  border-radius: 5px;
  content: "✓";
  font-size: 15px;
  font-weight: 900;
}

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

.audience-card {
  padding: 24px;
}

.pricing-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
}

.pricing-panel {
  padding: clamp(26px, 4vw, 42px);
}

.price-label {
  color: var(--muted);
}

.price {
  margin-bottom: 22px;
  color: var(--amber);
  font-size: clamp(58px, 9vw, 110px);
  font-weight: 900;
  line-height: 0.95;
}

.price small {
  color: var(--muted);
  font-size: 22px;
}

.include-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.include-pill {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  padding: 0 12px;
  color: var(--text);
  background: rgba(124, 103, 255, 0.18);
  border: 1px solid rgba(124, 103, 255, 0.38);
  border-radius: 6px;
  font-weight: 700;
}

.course-meta {
  display: grid;
  gap: 16px;
  margin: 0 0 28px;
}

.course-meta div {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.course-meta dt {
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 800;
}

.course-meta dd {
  margin: 0;
}

.full-btn {
  width: 100%;
}

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

.faq-item {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition:
    background 180ms ease,
    border-color 180ms ease;
}

.faq-item.is-open {
  background: rgba(124, 103, 255, 0.1);
  border-color: rgba(124, 103, 255, 0.45);
}

.faq-question {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 68px;
  padding: 18px 22px;
  color: var(--text);
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-weight: 800;
}

.faq-question::after {
  flex: 0 0 auto;
  color: var(--amber);
  content: "+";
  font-size: 24px;
  line-height: 1;
  transition: transform 180ms ease;
}

.faq-item.is-open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 220ms ease;
}

.faq-item.is-open .faq-answer {
  max-height: 260px;
}

.faq-answer p {
  margin: 0;
  padding: 0 22px 22px;
  color: var(--muted);
  line-height: 1.75;
}

.cta-section {
  text-align: center;
}

.cta-panel {
  padding: clamp(28px, 5vw, 56px);
  background:
    linear-gradient(145deg, rgba(124, 103, 255, 0.16), rgba(230, 111, 62, 0.1)),
    rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.cta-panel p:not(.section-kicker) {
  max-width: 720px;
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.closing-section {
  min-height: 58svh;
  padding: clamp(72px, 12vw, 150px) clamp(22px, 7vw, 92px);
  background:
    linear-gradient(90deg, rgba(8, 9, 12, 0.96), rgba(8, 9, 12, 0.62), rgba(8, 9, 12, 0.96)),
    url("11516548fd4b28b668ba971769bee837.jpg");
  background-position: center bottom;
  background-size: cover;
}

.closing-inner {
  width: min(980px, 100%);
}

.closing-line {
  margin-bottom: 34px;
  color: var(--text);
  font-size: clamp(30px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.18;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 30;
  padding: 12px 18px;
  color: #08090c;
  background: var(--text);
  border-radius: 8px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 16px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 920px) {
  .nav-links {
    display: none;
  }

  .feature-grid,
  .comparison-grid,
  .deliverable-grid,
  .audience-grid,
  .pricing-layout {
    grid-template-columns: 1fr;
  }

  .outcome-card {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 82svh;
  }
}

@media (max-width: 560px) {
  .site-header {
    min-height: 64px;
    padding: 12px 16px;
  }

  .brand {
    font-size: 15px;
  }

  .brand-text {
    font-size: 16px;
  }

  .header-cta {
    min-height: 38px;
    padding: 0 12px;
    font-size: 14px;
  }

  .hero {
    padding: 82px 18px 48px;
  }

  .hero-actions {
    display: grid;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }

  .feature-card,
  .comparison-card,
  .outcome-card,
  .deliverable-card,
  .audience-card,
  .pricing-panel {
    padding: 22px;
  }

  .timeline-item {
    padding: 22px 18px 22px 62px;
  }

  .timeline-item::before {
    left: 18px;
  }
}