<style>
.nav-container {
  color: #333;
  line-height: 1.6;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.nav-header {
  padding: 15px 15px 5px 0;
  width: 100%;
  margin-bottom: 10px;
}

.nav-header h1 {
  margin-bottom: 10px;
  font-size: 2.7em;
}

.article-h1 {
  color: #333;
  text-align: left;
  margin-bottom: 10px;
  margin-left: 0;
  padding-left: 0;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.95em;
  color: #666;
  margin: 5px 0 15px 0;
  padding-left: 0;
  flex-wrap: wrap;
}

.article-date {
  display: flex;
  align-items: center;
  gap: 8px;
}

.calendar-icon {
  display: inline-block;
  width: 18px;
  height: 18px;
  background: linear-gradient(145deg, #f0f0f0 0%, #d9d9d9 100%);
  border: 1px solid #999;
  border-radius: 3px;
  position: relative;
  flex-shrink: 0;
}

.calendar-icon::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 3px;
  width: 2px;
  height: 4px;
  background: #666;
  border-radius: 1px;
  box-shadow: 7px 0 0 #666;
}

.calendar-icon::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  font-size: 8px;
  font-weight: bold;
  color: #333;
}

.views-count {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #666;
}

.nav-content {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}

.nav-sidebar {
  flex: 1;
  min-width: 250px;
  padding: 25px 25px 25px 0;
  position: sticky;
  top: 20px;
  align-self: flex-start;
  max-height: 90vh;
  overflow-y: auto;
  font-size: 0.95em;
  line-height: 1.1;
}

.nav-sidebar ul {
  list-style-type: none;
  margin: 15px 0 25px;
  padding: 0;
}

.nav-sidebar li {
  margin-bottom: 10px;
  position: relative;
  transition: transform 0.2s;
}

.nav-sidebar a {
  color: #000000;
  text-decoration: none;
  transition: color 0.2s;
  font-weight: 500;
  display: block;
}

.nav-sidebar a:hover {
  color: #ff6600;
}

.nav-title {
  margin-top: 10px;
  padding-bottom: 1px;
  font-size: 1.1em;
}

.nav-main {
  flex: 3;
  min-width: 300px;
  position: relative;
}

.article-content {
  max-width: 900px;
  margin: 0 auto;
  line-height: 1.6;
  text-align: justify;
  overflow-wrap: break-word;
  word-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
}

.article-content a {
  word-break: break-all;
}

.no-underline {
  text-decoration: none;
  color: #ff6600;
}

.nav-section {
  margin-bottom: 40px;
  padding: 0;
  scroll-margin-top: 20px;
}

.article-h2 {
  color: #333;
  margin-top: 40px;
  padding-bottom: 10px;
  border-bottom: 1px solid #eee;
}

.article-h3 {
  color: #333;
  margin-top: 25px;
  margin-bottom: 25px;
}

.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

.float-image {
  max-width: 45%;
  height: auto;
  margin: 10px 20px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.float-left {
  float: left;
  margin-left: 0;
}

.float-right {
  float: right;
  margin-right: 0;
}

.back-to-top {
  display: flex !important;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: #000;
  border: 1px solid #000;
  border-radius: 50%;
  text-decoration: none;
  cursor: pointer;
  font-size: 1.3em;
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1 !important;
  transform: translateY(0) !important;
  pointer-events: auto !important;
}

.mobile-nav-container {
  display: none;
}

.mobile-nav {
  display: flex;
  gap: 5px;
  background: white;
  border-radius: 10px;
  min-width: max-content;
  flex-wrap: nowrap;
  padding-left: 0;
}

.mobile-nav a {
  white-space: nowrap;
  padding: 5px 15px;
  border-radius: 20px;
  text-decoration: none;
  color: #000;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 1px solid black;
  flex-shrink: 0;
}

.mobile-nav a:hover {
  color: #ff6600;
  border-color: #ff6600;
}

.order-method {
  background: white;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.method-title {
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0;
}

.method-content {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease;
}

.method-content.show {
  max-height: 2000px;
  padding-top: 15px;
}

.toggle-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  transition: transform 0.3s ease;
  color: #ff6a13;
  position: relative;
}

.table {
  width: 100%;
  margin: 20px auto;
  padding: 3px;
  border-collapse: collapse;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
}

@media (min-width: 768px) {
  .table {
    width: 95%;
    margin: 20px auto;
  }
}

.td,
th {
  padding: 12px;
  border: 1px solid #ddd;
  text-align: left;
  vertical-align: middle;
  box-sizing: border-box;
}

.td-head {
  font-weight: bold;
  background-color: #ff6a13;
  padding: 12px;
  text-align: center;
}

thead {
  background-color: #ff6a13;
}

tbody tr:nth-child(odd) {
  background-color: #f9f9f9;
}

tbody tr:hover {
  background-color: #f1f1f1;
}

.table-one .td-head {
  background-color: #ff6a13;
}

.table-one tbody td {
  padding-left: 20px;
}

@media (max-width: 768px) {
  .nav-content {
    flex-direction: column;
    max-width: 100%;
    overflow: hidden;
    gap: 15px;
  }

  .nav-sidebar {
    display: none;
  }

  .mobile-nav-container {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .mobile-nav-container::-webkit-scrollbar {
    display: none;
  }

  .nav-header {
    padding: 10px 10px 0 0;
  }

  .nav-header h1 {
    font-size: 1.9em;
    margin-bottom: 5px;
    text-align: left;
  }

  .article-meta {
    margin: 5px 0 10px 0;
    font-size: 0.9em;
    padding-left: 0;
    gap: 12px;
  }

  .nav-main {
    flex: 1 1 100%;
    min-width: 0;
    max-width: 100%;
  }

  .article-content {
    max-width: 100%;
    padding-right: 5px;
  }

  .float-image {
    max-width: 100%;
    float: none;
    margin: 20px auto;
    display: block;
  }

  .back-to-top {
    position: absolute;
    right: 10px;
    bottom: 30px;
    width: 40px;
    height: 40px;
    font-size: 1.3em;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }

  .nav-section:last-of-type {
    margin-bottom: 60px;
  }

  .table {
    display: table;
    width: 100%;
    min-width: 480px;
    overflow-x: auto;       
    -webkit-overflow-scrolling: touch;
    margin: 10px 0;
    padding: 0;
    border-collapse: collapse;
  }

  .table thead,
  .table tbody,
  .table tr {
    display: table-row-group; 
  }

  .table tr {
    display: table-row;
  }

  .table td,
  .table th {
    display: table-cell;
    padding: 8px 6px;
    font-size: 12px;
    white-space: normal;
    word-break: break-word;
    vertical-align: middle;
    border: 1px solid #ddd;
  }

  .table-one tbody td {
    padding-left: 10px;
  }
}

@media (max-width: 600px) {
  .table {
    width: calc(100% - 6px);
    margin: 10px;
    padding: 6px;
  }

  .td,
  .td-head,
  th {
    padding: 8px !important;
    font-size: 12px !important;
  }

  .td-head {
    padding: 10px;
    font-size: 14px;
  }
}

@media (min-width: 769px) {
  .mobile-nav-container {
    display: none;
  }

  .back-to-top {
    display: flex;
  }
}
</style>
