/* ============================================================
   幸福研究认证课程 · 极简现代风格
   ============================================================ */

:root {
  --font-heading: 'Playfair Display', Georgia, 'Songti SC', 'Noto Serif SC', 'SimSun', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', sans-serif;
  --font-cn: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;

  --color-bg: #ffffff;
  --color-cream: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555;
  --color-text-muted: #999;
  --color-border: #e5e5e5;
  --color-border-light: #f0f0f0;
  --color-success: #2e7d32;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --container: 960px;

  /* Hero 字号 */
  --hero-cn1-size: 15px;
  --hero-cn2-size: 49px;
  --hero-en1-size: 27px;
  --hero-en2-size: 17px;

  /* 区块标题 */
  --section-title-size: 36px;
  --section-lead-size: 14px;
  --section-subtitle-size: 20px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--color-text); text-decoration: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }

/* ============================================================
   Header（联系我们 + 立即报名 左右互换）
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border-light);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px;
}
.header-logo img { height: 36px; }
.header-nav { display: flex; align-items: center; gap: 24px; }
.nav-link {
  font-size: 14px; color: var(--color-text-secondary);
  transition: color 0.2s;
}
.nav-link:hover { color: var(--color-text); }
.nav-cta {
  padding: 8px 20px;
  border: 1px solid var(--color-text);
  border-radius: 999px;
  color: var(--color-text);
}
.nav-cta:hover { background: var(--color-text); color: #fff; }

/* 手机端菜单按钮（桌面端隐藏） */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  padding: 8px;
  cursor: pointer;
  width: 36px;
  height: 36px;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}
.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s;
}
.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 手机端下拉菜单 */
.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 16px;
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  min-width: 160px;
  z-index: 200;
}
.mobile-menu.active {
  display: block;
}
.mobile-menu a {
  display: block;
  padding: 14px 20px;
  font-size: 14px;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-light);
}
.mobile-menu a:last-child {
  border-bottom: none;
}
.mobile-menu a:hover {
  background: var(--color-cream);
}

/* ============================================================
   Hero
   ============================================================ */
.hero { padding: 100px 0 80px; text-align: center; }
.hero-inner { max-width: 900px; margin: 0 auto; }
.hero-line { display: block; margin: 0 auto; text-align: center; }
.hero-line-cn1 {
  font-family: var(--font-cn);
  font-size: var(--hero-cn1-size);
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
  letter-spacing: 1px;
}
.hero-line-cn2 {
  font-family: var(--font-heading);
  font-size: var(--hero-cn2-size);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 25px;
  letter-spacing: 1px;
}
.hero-line-en1 {
  font-family: var(--font-heading);
  font-size: var(--hero-en1-size);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: 8px;
}
.hero-line-en2 {
  font-family: var(--font-heading);
  font-size: var(--hero-en2-size);
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  font-style: italic;
}
.home-main-img {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  margin: 0 auto 32px;
  border-radius: 12px;
}
.hero-badge-row { display: flex; justify-content: center; margin-bottom: 40px; }
.hero-badge {
  padding: 10px 24px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* 主按钮 */
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: var(--color-text);
  color: #fff;
  font-size: 15px; font-weight: 500;
  border: none; border-radius: 999px;
  cursor: pointer; transition: all 0.2s;
  font-family: var(--font-body);
}
.btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }

.btn-ghost {
  display: inline-block;
  padding: 10px 24px;
  background: transparent;
  color: var(--color-text);
  font-size: 14px; font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer; transition: all 0.2s;
  font-family: var(--font-body);
}
.btn-ghost:hover { border-color: var(--color-text); background: var(--color-text); color: #fff; }

.btn-code {
  padding: 8px 16px;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 13px; font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer; white-space: nowrap;
  font-family: var(--font-body);
}
.btn-code:hover { border-color: var(--color-text); color: var(--color-text); }

/* ============================================================
   通用 Section（统一白色背景）
   ============================================================ */
.section { padding: 80px 0; background: #fff; }

/* 弹窗打开时锁定页面滚动 */
body.modal-open { overflow: hidden; }
.section-title {
  font-family: var(--font-heading);
  font-size: var(--section-title-size);
  font-weight: 500; line-height: 1.2;
  text-align: center; margin-bottom: 20px;
}
.section-lead {
  font-size: var(--section-lead-size);
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 700px; margin: 0 auto 48px;
  line-height: 1.8;
}
.section-subtitle {
  font-family: var(--font-heading);
  font-size: var(--section-subtitle-size);
  font-weight: 500; text-align: center;
  margin-bottom: 32px;
}

/* ============================================================
   视频（单张居中）
   ============================================================ */
.video-single-wrap {
  max-width: 760px;
  margin: 0 auto;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/9;
}
.video-player { width: 100%; height: 100%; display: block; background: #000; }

/* ============================================================
   Course Intro · Feature Grid
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.feature-card {
  background: #fff;
  padding: 40px 32px;
}
.feature-title {
  font-family: var(--font-heading);
  font-size: var(--card-title-size, 20px);
  font-weight: 500; margin-bottom: 12px;
}
.feature-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   Languages（一行放下所有语言）
   ============================================================ */
.lang-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px;
}
.lang-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--color-text-secondary);
  white-space: nowrap;
}
.lang-item img {
  width: 18px;
  height: 12px;
  object-fit: cover;
  border-radius: 2px;
}

/* ============================================================
   Community Carousel（5张竖向卡片一排，9:16图片，每次跳一个卡片）
   ============================================================ */
.community-carousel {
  position: relative;
  max-width: 100%;
  margin: 0 auto;
}
.carousel-track-wrap {
  overflow: hidden;
  padding: 8px 4px;
}
.carousel-track {
  display: flex;
  gap: 16px;
  transition: transform 0.5s ease;
  will-change: transform;
}
.carousel-card {
  flex: 0 0 calc((100% - 64px) / 5); /* 5 张卡片一排 */
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s;
}
.carousel-card:hover {
  border-color: var(--color-border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.carousel-img {
  width: 100%;
  aspect-ratio: 9 / 16; /* 竖向图片比例 */
  object-fit: cover;
  background: var(--color-cream);
}
.carousel-card .carousel-img + * {
  padding: 18px 20px 0 20px;
}
.carousel-title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
  line-height: 1.4;
  padding: 18px 20px 0 20px;
}
.carousel-text {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.65;
  padding: 0 20px 22px 20px;
}

.carousel-btn {
  position: absolute;
  top: 40%;
  transform: translateY(-50%);
  width: 44px; height: 44px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 28px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  line-height: 1;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  transition: all 0.2s;
  z-index: 10;
}
.carousel-btn:hover { background: var(--color-text); color: #fff; }
.carousel-btn-prev { left: -10px; }
.carousel-btn-next { right: -10px; }

.carousel-dots {
  display: flex; justify-content: center; gap: 10px;
  margin-top: 24px;
}
.carousel-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: all 0.3s;
  border: none; padding: 0;
}
.carousel-dot.active {
  background: var(--color-text);
  width: 24px; border-radius: 4px;
}

/* ============================================================
   Testimonials（浅色背景 · 头像+姓名+简介+quote+正文）
   ============================================================ */
.section-testimonials .container { max-width: 760px; }
.testimonial-item {
  text-align: center;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border-light);
}
.testimonial-item:last-child { border-bottom: none; }
.testimonial-avatar {
  width: 160px; height: 160px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 28px;
  background: var(--color-cream);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.testimonial-name {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
}
.testimonial-title {
  color: var(--color-text-secondary);
  font-size: 15px;
  margin-bottom: 24px;
}
.testimonial-quote {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 20px;
  color: var(--color-text);
}
.testimonial-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.9;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

/* ============================================================
   Program Syllabus · 书本透明背景 + 缩小30%
   ============================================================ */
.semester-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.semester-card {
  text-align: center;
  padding: 20px;
}
.semester-book {
  width: 140px; /* 缩小30%：原约200px */
  height: auto;
  margin: 0 auto 24px;
  display: block;
  filter: drop-shadow(0 4px 18px rgba(0,0,0,0.12));
}
.semester-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}
.semester-title {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 500;
  margin-bottom: 14px;
}
.semester-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

/* ============================================================
   Coach Certificate · 缩小30% · 透明背景
   ============================================================ */
.certificate-wrap {
  max-width: 520px;
  margin: 0 auto 32px;
  text-align: center;
}
.certificate-img {
  width: 100%;
  max-width: 364px; /* 缩小30%：原约520px */
  height: auto;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 6px 24px rgba(0,0,0,0.12));
  background: transparent;
}

/* ============================================================
   Why Enroll
   ============================================================ */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.why-card {
  background: #fff;
  padding: 40px 32px;
  text-align: left;
}
.why-label {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 16px;
}
.why-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   Signup Area
   ============================================================ */
.signup-block {
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 10px;
  margin-bottom: 24px;
}
.signup-block-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 28px;
}

/* 入学流程 */
.enrollment-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.step-item {
  display: flex; gap: 14px;
  align-items: flex-start;
  padding: 20px;
  background: var(--color-cream);
  border-radius: var(--radius);
}
.step-num {
  font-family: var(--font-heading);
  font-size: 26px; font-weight: 500;
  line-height: 1; color: var(--color-text);
  min-width: 28px;
}
.step-title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }

/* 学费展示 */
.tuition-card {
  text-align: center;
  padding: 36px;
  background: var(--color-cream);
  border-radius: var(--radius);
}
.tuition-price {
  font-family: var(--font-heading);
  margin-bottom: 8px;
}
.tuition-amount {
  font-size: 36px; font-weight: 600;
}
.tuition-currency {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-left: 8px;
}
.tuition-note {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}
.tuition-actions {
  display: flex; gap: 12px; justify-content: center;
}

/* FAQ */
.faq-list { display: flex; flex-direction: column; }
.faq-item { border-bottom: 1px solid var(--color-border-light); }
.faq-item:first-child { border-top: 1px solid var(--color-border-light); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 4px;
  cursor: pointer;
  font-size: 17px; font-weight: 500;
  transition: color 0.2s;
  user-select: none;
}
.faq-question:hover { color: var(--color-text-secondary); }
.faq-toggle {
  font-family: var(--font-heading);
  font-size: 24px; font-weight: 300;
  color: var(--color-text-muted);
  transition: transform 0.3s;
  line-height: 1;
  margin-left: 16px;
  flex-shrink: 0;
}
.faq-item.open .faq-toggle { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 4px;
}
.faq-item.open .faq-answer {
  max-height: 2000px;
  padding: 0 4px 20px;
}
.faq-answer-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* 视频 + 表单：左右并列布局（左=视频9:16，右=表单） */
.signup-video-form-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 32px;
  align-items: start;
}
.signup-video-left {
  width: 100%;
}
.signup-form-right {
  width: 100%;
}
.signup-video-wrap {
  aspect-ratio: 9/16;
  background: #000;
  overflow: hidden;
  width: 100%;
}
.signup-video-wrap .video-player {
  width: 100%;
  height: 100%;
  display: block;
  background: #000;
}

/* 响应式：窄屏下视频在上，表单在下 */
@media (max-width: 768px) {
  .signup-video-form-row {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .signup-video-wrap {
    max-width: 280px;
    margin: 0 auto;
  }
}

/* 报名表单 */
.form-hint-text {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}
.signup-form { max-width: 100%; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.form-item {
  display: flex; flex-direction: column; gap: 8px;
}
.form-item-full { grid-column: 1 / -1; }
.form-label {
  font-size: 13px; font-weight: 500;
  color: var(--color-text-secondary);
}
.required { color: #c00; }
.form-item input,
.form-item select {
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: var(--font-body);
  background: #fff;
  transition: border-color 0.2s;
  color: var(--color-text);
  width: 100%;
}
.form-item input:focus,
.form-item select:focus {
  outline: none; border-color: var(--color-text);
}
.radio-group {
  display: flex; flex-wrap: wrap; gap: 14px;
  padding: 11px 14px;
}
.radio-item {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; color: var(--color-text);
  cursor: pointer;
}
.radio-item input[type="radio"] {
  width: 16px; height: 16px;
  margin: 0; padding: 0;
  accent-color: var(--color-text);
  cursor: pointer;
}
.input-with-btn { display: flex; gap: 8px; }
.input-with-btn input { flex: 1; min-width: 0; }
.promo-status { font-size: 12px; color: var(--color-success); min-height: 18px; margin-top: 4px; }

.form-summary {
  margin: 28px 0 24px;
  padding: 24px;
  background: var(--color-cream);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: space-between;
}
.form-summary-label { font-size: 14px; color: var(--color-text-secondary); }
.form-summary-price {
  font-family: var(--font-heading);
  font-size: 26px; font-weight: 500;
}
.form-summary-usd {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-left: 8px;
}
.btn-submit { width: 100%; padding: 15px; font-size: 16px; }

/* 性别单选（与小程序一致的 radio 样式） */
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 6px 0;
}
.radio-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--color-text);
  cursor: pointer;
}
.radio-item input {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

/* ============================================================
   Contact Us · 三栏 · 居中对齐
   ============================================================ */
.section-contact .container {
  max-width: var(--container);
  padding-left: 32px;
  padding-right: 32px;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  align-items: start;
}
.contact-col {
  padding: 16px 0;
}
.contact-col-text { padding-right: 8px; }
.contact-title {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
  text-align: center;
}
.contact-item {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  white-space: nowrap;
  text-align: center;
}
.contact-qr {
  width: 128px;
  height: 128px;
  margin: 0 auto;
  object-fit: contain;
  border-radius: var(--radius);
  background: transparent;
  padding: 4px;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.08));
  display: block;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border-light);
  background: var(--color-cream);
}
.footer-inner {
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
}
.footer-text {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ============================================================
   Modals
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  display: none;
  align-items: center; justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-box {
  background: #fff;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex; flex-direction: column;
  animation: slideUp 0.3s ease;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.modal-box--large { max-width: 640px; }
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 28px;
  border-bottom: 1px solid var(--color-border-light);
}
.modal-title {
  font-family: var(--font-heading);
  font-size: 20px; font-weight: 500;
}
.modal-close-btn {
  width: 32px; height: 32px;
  border: none; background: transparent;
  font-size: 24px; cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
  border-radius: 50%;
  transition: all 0.2s;
}
.modal-close-btn:hover { background: var(--color-cream); color: var(--color-text); }

.modal-body { padding: 28px; overflow-y: auto; }
.modal-body--scroll { max-height: 60vh; }
.modal-footer {
  padding: 18px 28px;
  border-top: 1px solid var(--color-border-light);
  display: flex; justify-content: flex-end;
}
.modal-h4 {
  font-family: var(--font-heading);
  font-size: 17px; font-weight: 500;
  margin: 20px 0 8px;
}
.modal-h4:first-child { margin-top: 0; }
.modal-p {
  font-size: 14px; color: var(--color-text-secondary);
  line-height: 1.8; margin-bottom: 8px;
}

/* 课程大纲弹窗：无衬线、不加粗、字号缩小 */
#syllabusModal .modal-h4 {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  margin: 20px 0 8px;
}
#syllabusModal .modal-p {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
}

/* 确认信息 */
.confirm-info {
  background: var(--color-cream);
  padding: 20px;
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.confirm-row {
  display: flex; padding: 6px 0; font-size: 14px;
}
.confirm-row + .confirm-row { border-top: 1px solid rgba(0,0,0,0.05); }
.confirm-label {
  width: 120px;
  color: var(--color-text-muted);
  flex-shrink: 0;
  font-size: 13px;
}
.confirm-value {
  color: var(--color-text);
  font-weight: 500;
  flex: 1;
  text-align: right;
}
.confirm-total-row {
  padding-top: 12px;
  border-top: 2px solid var(--color-border) !important;
  font-weight: 600;
}

.checkbox-item {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 14px;
  background: var(--color-cream);
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 20px;
  cursor: pointer;
}
.checkbox-item input { margin-top: 3px; width: 16px; height: 16px; cursor: pointer; }
.link-inline { color: var(--color-text); text-decoration: underline; cursor: pointer; }
.modal-actions {
  display: flex; gap: 12px; justify-content: flex-end;
}

/* 扫码支付 */
.qr-wrap { text-align: center; padding: 10px 0; }
.qr-image-wrap {
  width: 200px; height: 200px;
  margin: 0 auto 18px;
  padding: 10px;
  background: #fff;
  border: 2px solid #07c160;
  border-radius: var(--radius);
}
.qr-image { width: 100%; height: 100%; object-fit: contain; }
.qr-text { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 6px; }
.qr-amount {
  font-family: var(--font-heading);
  font-size: 26px; font-weight: 500;
  margin-bottom: 8px;
}
.qr-timer { font-size: 12px; color: var(--color-text-muted); }
.qr-loading { font-size: 12px; color: var(--color-text-muted); margin-top: 8px; }

.pay-status {
  text-align: center;
  padding: 18px;
  border-top: 1px solid var(--color-border-light);
  margin-top: 8px;
}
.pay-status-text { font-size: 13px; color: var(--color-text-secondary); margin-bottom: 12px; }

/* 支付成功 */
.success-icon-area { text-align: center; padding: 10px 0 28px; }
.success-check {
  width: 60px; height: 60px; line-height: 60px;
  font-size: 32px;
  border-radius: 50%;
  background: #07c160;
  color: #fff;
  margin: 0 auto 20px;
}
.success-text {
  font-family: var(--font-heading);
  font-size: 20px; font-weight: 500;
}
.success-info {
  background: var(--color-cream);
  padding: 20px 24px;
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.info-row { display: flex; padding: 6px 0; font-size: 14px; }
.info-row + .info-row { border-top: 1px solid rgba(0,0,0,0.05); }
.info-label {
  width: 120px; color: var(--color-text-muted);
  flex-shrink: 0;
  font-size: 13px;
}
.info-value {
  color: var(--color-text);
  font-weight: 500;
  word-break: break-all;
  text-align: right;
  flex: 1;
}
.success-tip {
  background: #e8f5e9;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--color-success);
}
.success-tip p { margin-bottom: 4px; }
.success-tip p:last-child { margin-bottom: 0; }
.success-qrcode {
  text-align: center;
  padding: 20px;
  background: var(--color-cream);
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.qrcode-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 16px;
}
.qrcode-img {
  width: 160px;
  height: 160px;
  object-fit: contain;
  margin: 0 auto;
  display: block;
}
.qrcode-hint {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 10px;
}
.success-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}
.success-actions .btn-primary {
  width: 100%;
  max-width: 280px;
}
.success-actions .btn-ghost {
  width: 100%;
  max-width: 280px;
}
.success-info + button { width: 100%; padding: 14px; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  body { font-size: 15px; line-height: 1.7; }
  .container { padding: 0 20px; }
  .hero { padding: 60px 0 40px; }
  .section { padding: 50px 0; }

  :root {
    --hero-cn1-size: 10px;
    --hero-cn2-size: 34px;
    --hero-en1-size: 19px;
    --hero-en2-size: 12px;
    --section-title-size: 22px;
    --section-lead-size: 14px;
    --section-subtitle-size: 17px;
  }

  .hero-line-cn2 { line-height: 1.35; margin-bottom: 18px; }
  .hero-line-cn1 { line-height: 1.6; margin-bottom: 2px; }
  .hero-line-en1 { letter-spacing: 0; }
  .home-main-img { width: 80%; max-width: 280px; margin: 0 auto 24px; }

  .section-title { line-height: 1.3; margin-bottom: 16px; }
  .section-lead { line-height: 1.75; margin-bottom: 24px; }
  .feature-grid { grid-template-columns: 1fr; gap: 20px; }
  .feature-title { font-size: 16px; margin-bottom: 8px; }
  .feature-text { font-size: 14px; line-height: 1.75; }

  .semester-grid { grid-template-columns: 1fr; gap: 20px; }
  .why-grid { grid-template-columns: 1fr; }
  .enrollment-steps { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 16px; }
  .signup-block { padding: 20px; }
  .signup-video-with-image { grid-template-columns: 1fr; }

  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .contact-col { padding: 12px 0; }
  .section-contact .container {
    max-width: 100%;
    margin: 0 auto;
  }
  .contact-item { white-space: normal; }

  /* 轮播：手机上显示 2 张卡片 */
  .carousel-card { flex: 0 0 calc((100% - 16px) / 2); }
  .carousel-btn-prev { left: 6px; }
  .carousel-btn-next { right: 6px; }
  .carousel-btn { width: 38px; height: 38px; font-size: 22px; }
  .carousel-title { font-size: 15px; }
  .carousel-text { font-size: 13px; line-height: 1.6; }

  .testimonial-avatar { width: 100px; height: 100px; margin-bottom: 16px; }
  .testimonial-name { font-size: 18px; }
  .testimonial-quote { font-size: 15px; line-height: 1.6; }
  .testimonial-text { font-size: 14px; line-height: 1.75; }

  .semester-book { width: 100px; }
  .certificate-img { max-width: 260px; }

  .tuition-amount { font-size: 24px; }
  .qr-image-wrap { width: 180px; height: 180px; }
  .contact-qr { width: 110px; height: 110px; }

  .btn-hero { padding: 12px 32px; font-size: 14px; }
  .hero-badge { font-size: 13px; padding: 8px 18px; }

  /* 手机端隐藏普通导航，显示三点菜单按钮 */
  .header-nav { display: none; }
  .mobile-menu-btn { display: flex; }
}

@media (max-width: 480px) {
  .tuition-amount { font-size: 24px; }
  .qr-image-wrap { width: 180px; height: 180px; }
  .contact-qr { width: 110px; height: 110px; }
  .confirm-label { width: 90px; }
  .info-label { width: 90px; }
}