/* JOIN HERO */
.join-hero {
  background: var(--gray-light);
  padding: 64px 40px 56px;
  text-align: center;
  border-bottom: 1px solid var(--gray-mid);
}
.join-hero-inner h1 { font-size: clamp(28px, 4vw, 48px); font-weight: 800; margin-bottom: 14px; }
.join-hero-inner p  { font-size: 16px; color: var(--gray-text); max-width: 520px; margin: 0 auto; line-height: 1.7; }

/* 我们在做什么 */
.join-what-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  background: white;
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.join-what-text h2 { font-size: clamp(20px, 2.5vw, 28px); font-weight: 700; margin-bottom: 16px; }
.join-what-text p  { font-size: 15px; color: var(--gray-text); line-height: 1.9; }
.join-watermark {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
}
.join-phone-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}
.join-phone {
  filter: drop-shadow(0 20px 48px rgba(0,0,0,0.15));
  animation: float 4.5s ease-in-out infinite;
}
.join-phone img { width: 200px; height: auto; }

/* 我们在找谁 */
.who-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 600px;
  margin: 0 auto 20px;
}
.who-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: white;
  border-radius: var(--radius-lg);
  padding: 18px 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.who-num {
  width: 32px; height: 32px;
  background: var(--black);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
  flex-shrink: 0;
}
.who-text { font-size: 15px; font-weight: 500; color: var(--black); }
.who-note {
  text-align: center;
  font-size: 13px;
  color: var(--gray-text-light);
  margin-top: 8px;
}

/* 参与方向 */
.direction-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.direction-card {
  background: var(--gray-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1.5px solid var(--gray-mid);
  transition: box-shadow var(--transition), transform var(--transition);
}
.direction-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.direction-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.direction-title { font-size: 16px; font-weight: 700; color: var(--black); }
.direction-sub { font-size: 13px; font-weight: 600; color: var(--gray-text); margin-bottom: 10px; }
.direction-list { display: flex; flex-direction: column; gap: 8px; }
.direction-list li {
  font-size: 14px;
  color: var(--gray-text);
  padding-left: 14px;
  position: relative;
  line-height: 1.6;
}
.direction-list li::before {
  content: '•';
  position: absolute; left: 0;
  color: var(--black);
  font-weight: 700;
}

/* 加入方式 */
.join-how-box {
  background: white;
  border-radius: var(--radius-xl);
  padding: 48px;
  max-width: 640px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
}
.join-how-box h2 { font-size: clamp(20px, 2.5vw, 28px); font-weight: 700; margin-bottom: 28px; }
.how-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}
.how-icon { font-size: 20px; margin-top: 2px; flex-shrink: 0; }
.how-label { font-size: 14px; color: var(--gray-text); margin-bottom: 4px; }
.how-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--black);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.how-value:hover { color: #555; }
.how-notes {
  display: flex; flex-direction: column; gap: 4px;
  list-style: none;
}
.how-notes li {
  font-size: 14px;
  color: var(--gray-text);
  padding-left: 12px;
  position: relative;
}
.how-notes li::before { content: '·'; position: absolute; left: 0; font-weight: 700; }

/* Responsive */
@media (max-width: 768px) {
  .join-hero { padding: 48px 20px 40px; }
  .join-what-grid { grid-template-columns: 1fr; gap: 32px; padding: 28px 24px; }
  .join-phone { display: flex; justify-content: center; }
  .join-phone img { width: 160px; }
  .direction-grid { grid-template-columns: 1fr; }
  .join-how-box { padding: 28px 24px; }
}