/* ==============================
   Header
   ============================== */
header {
  background-color: #002b5b;
  color: white;
  padding: 25px 0;
  margin-bottom: 10px;
}

header .header-container {
  display: flex;
  flex-direction: column;
  align-items: center; /* 整体居中 */
}

.header-title-row {
  display: flex;
  align-items: center; /* logo 与标题垂直居中 */
  justify-content: center; /* 标题居中 */
}

.header-title-row .logo {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #ffffffcc;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
  background-color: #fff;
  margin-right: 15px;
}

header h1 {
  margin: 0;
  color: #ffffff;
}

/* ==============================
   VAMOS
   ============================== */
/* ====== VAMOS 标题统一样式 ====== */
header .vamos-line,
.vamos-line {
  font-size: 2rem;            /* 字体大小 */
  font-weight: 800;           /* 加粗 */
  color: #ffffff !important;  /* 白色字体 */
  text-align: center;         /* 居中 */
  line-height: 1;             /* 行高紧凑 */
  letter-spacing: -0.05em;    /* 字母间距 */
  margin: 5px 0;              /* 上下间距 */
  font-family: 'Poppins', sans-serif;
  position: relative;         /* 保持层级定位 */
  z-index: 10;
}


/* ==============================
   Navigation
   ============================== */
header nav {
  margin-top: 5px;
}

header nav a {
  margin: 0 15px;
  font-weight: 500;
  color: white;
  transition: opacity 0.3s ease;
}

header nav a.active {
  font-weight: bold;
  text-decoration: underline;
}

header nav a:hover {
  opacity: 0.8;
}

/* ==============================
   Responsive adjustments
   ============================== */
@media (max-width: 900px) {
  .header-title-row {
    flex-direction: column;
  }
  .header-title-row .logo {
    margin-right: 0;
    margin-bottom: 10px;
  }
}