* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  min-height: 100%;
  background-color: #0b0203;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: #ffffff;
  overflow-x: hidden;
}

.page-wrap {
  width: 100%;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  background: #0b0203 url('assets/images/bg.png') top center no-repeat;
  background-size: cover;
  background-attachment: fixed;
}

.main-card {
  width: 100%;
  max-width: 520px;
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
  padding-bottom: 40px;
  background: rgba(0, 0, 0, 0.25);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.8);
}

/* 1. 顶部 Hero */
.hero-section {
  width: 100%;
  position: relative;
  line-height: 0;
}

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

/* 2. CTA 通用样式 */
.cta-section {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 16px;
  z-index: 10;
}

.cta-mid {
  margin-top: -12px;
  margin-bottom: 16px;
}

.btn-cta {
  display: block;
  width: 100%;
  max-width: 460px;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
  line-height: 0;
}

.btn-cta img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.45));
}

.btn-cta:hover {
  transform: scale(1.02);
  filter: brightness(1.05);
}

.btn-cta:active {
  transform: scale(0.97);
  filter: brightness(0.95);
}

/* 3. 课程列表 */
.curriculum-section {
  width: 100%;
  padding: 6px 16px;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.course-card {
  width: 100%;
  line-height: 0;
  transition: transform 0.2s ease;
}

.course-card img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.35));
}

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

/* 4. 优势卖点 */
.features-section {
  width: 100%;
  padding: 16px 16px 8px;
  line-height: 0;
}

.features-img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5));
}

/* 5. 底部 CTA */
.cta-bottom {
  margin-top: 10px;
  padding: 10px 16px 20px;
}