:root {
  --jn-teal: #0F6E6A;
  --jn-teal-deep: #0A4A47;
  --jn-moss: #6B7D5C;
  --jn-terra: #C97D50;
  --jn-cream: #F8F4E8;
  --jn-orange: #E88C2E;
  --jn-gold: #D4AF37;
  --jn-ink: #2B2B2B;
  --jn-gray: #8C8C8C;
  --jn-header-w: 280px;
  --jn-font-head: 'Noto Serif SC','Source Han Serif SC','SimSun',serif;
  --jn-font-body: 'Noto Sans SC','Source Han Sans SC','Microsoft YaHei',sans-serif;
  --jn-font-mono: 'Roboto Mono','Fira Mono',monospace;
  --jn-transition: 0.25s ease;
  --jn-shadow: 0 2px 12px rgba(43,43,43,0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--jn-font-body);
  background: var(--jn-cream);
  color: var(--jn-ink);
  line-height: 1.75;
  font-size: 1rem;
}

body.modal-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
}

button {
  font-family: inherit;
}

:focus-visible {
  outline: 3px solid var(--jn-orange);
  outline-offset: 2px;
}

::selection {
  background: rgba(15,110,106,0.15);
}

.jn-skip-link {
  position: fixed;
  left: 8px;
  top: 8px;
  z-index: 1300;
  padding: 8px 16px;
  background: var(--jn-cream);
  color: var(--jn-teal);
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
  transform: translateY(-300%);
  transition: transform 0.2s;
}

.jn-skip-link:focus {
  transform: translateY(0);
}

.jn-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--jn-teal), var(--jn-gold), var(--jn-orange));
  transform: scaleX(0);
  transform-origin: left;
  z-index: 1200;
  border-radius: 0 3px 3px 0;
}

.jn-header {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--jn-header-w);
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 24px 20px;
  background: linear-gradient(160deg, var(--jn-teal-deep) 0%, var(--jn-teal) 55%, #0B5550 100%);
  color: var(--jn-cream);
  box-shadow: 4px 0 20px rgba(10,40,38,0.25);
  z-index: 100;
  overflow-y: auto;
}

.jn-header::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -20%;
  width: 130%;
  height: 80%;
  background:
    radial-gradient(circle at 80% 20%, rgba(212,175,55,0.08) 0%, transparent 60%),
    radial-gradient(circle at 20% 90%, rgba(232,140,46,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.jn-header__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.jn-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
  gap: 12px;
}

.jn-brand__seal {
  width: 48px;
  height: 48px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--jn-gold);
  border-radius: 6px;
  font-family: var(--jn-font-head);
  font-size: 1.5rem;
  color: var(--jn-gold);
  background: rgba(212,175,55,0.08);
  transform: rotate(-3deg);
  box-shadow: 0 0 0 1px rgba(212,175,55,0.15);
}

.jn-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.jn-brand__name {
  font-family: var(--jn-font-head);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.jn-brand__sub {
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  color: rgba(248,244,232,0.65);
}

.jn-nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 0;
  color: var(--jn-cream);
  cursor: pointer;
  padding: 8px;
  font-size: 0.875rem;
}

.jn-nav-toggle__icon {
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: background 0.2s;
}

.jn-nav-toggle__icon::before,
.jn-nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.25s, top 0.25s;
}

.jn-nav-toggle__icon::before {
  top: -6px;
}

.jn-nav-toggle__icon::after {
  top: 6px;
}

.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle__icon {
  background: transparent;
}

.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle__icon::before {
  top: 0;
  transform: rotate(45deg);
}

.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle__icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.jn-nav {
  display: flex;
  flex-direction: column;
  flex: 1;
  margin-top: 32px;
  position: relative;
  z-index: 1;
}

.jn-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.jn-nav__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-left: 3px solid transparent;
  color: rgba(248,244,232,0.85);
  text-decoration: none;
  font-size: 0.95rem;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  border-radius: 0 4px 4px 0;
}

.jn-nav__link:hover {
  background: rgba(255,255,255,0.06);
  border-left-color: rgba(212,175,55,0.4);
  color: #fff;
}

.jn-nav__link[aria-current="page"] {
  background: rgba(255,255,255,0.12);
  border-left-color: var(--jn-gold);
  color: #fff;
}

.jn-nav__index {
  font-family: var(--jn-font-mono);
  font-size: 0.75rem;
  color: var(--jn-gold);
  letter-spacing: 0.05em;
  min-width: 22px;
}

.jn-nav__label {
  font-weight: 600;
}

.jn-nav__footnote {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.14);
  font-size: 0.75rem;
  color: rgba(248,244,232,0.55);
  letter-spacing: 0.05em;
}

.jn-nav__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--jn-orange);
  box-shadow: 0 0 0 3px rgba(232,140,46,0.15);
}

.jn-header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 8px 12px;
  background: rgba(0,0,0,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 4px;
  font-size: 0.875rem;
  color: rgba(248,244,232,0.6);
  position: relative;
  z-index: 1;
}

.jn-header-search__icon {
  font-family: var(--jn-font-mono);
  color: var(--jn-gold);
  font-size: 1rem;
}

.jn-header-search__placeholder {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.jn-backtop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1100;
  padding: 10px 18px;
  background: var(--jn-terra);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(201,125,80,0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s, visibility 0.25s, transform 0.25s;
}

.jn-backtop.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.jn-footer {
  background: var(--jn-teal-deep);
  color: #D8D2C0;
  padding: 64px 48px 28px;
}

.jn-footer__wrap {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
}

.jn-footer__brand {
  padding-right: 24px;
}

.jn-footer__mark {
  display: inline-block;
  font-family: var(--jn-font-head);
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  color: var(--jn-gold);
  border: 2px solid var(--jn-gold);
  border-radius: 4px;
  padding: 4px 10px;
  margin-bottom: 16px;
}

.jn-footer__about {
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(248,244,232,0.7);
  max-width: 32em;
}

.jn-footer__title {
  font-family: var(--jn-font-head);
  font-size: 1.1rem;
  color: #EFEBDD;
  letter-spacing: 0.08em;
  padding-left: 12px;
  border-left: 3px solid var(--jn-gold);
  margin-bottom: 16px;
  font-weight: 700;
}

.jn-footer__list,
.jn-footer__contactlist {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.jn-footer__item a {
  color: #C7C1B0;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  padding-bottom: 2px;
}

.jn-footer__item a:hover {
  color: #fff;
  border-bottom-color: var(--jn-orange);
}

.jn-footer__contact-item {
  font-size: 0.9rem;
  color: #C7C1B0;
  line-height: 1.6;
  word-break: break-all;
}

.jn-footer__bottom {
  max-width: 1280px;
  margin: 40px auto 0;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: rgba(248,244,232,0.5);
}

.jn-footer__legal {
  display: flex;
  gap: 8px;
  align-items: center;
}

.jn-footer__legal a {
  color: rgba(248,244,232,0.7);
  text-decoration: none;
  transition: color 0.2s;
}

.jn-footer__legal a:hover {
  color: var(--jn-gold);
}

.jn-footer__dot {
  opacity: 0.5;
}

.jn-footer__note {
  width: 100%;
  line-height: 1.7;
  opacity: 0.75;
}

.jn-container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

.jn-section {
  padding: 56px 0;
}

.jn-section--muted {
  background: rgba(107,125,92,0.08);
}

.jn-grid {
  display: grid;
  gap: 24px;
}

.jn-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.jn-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.jn-card {
  background: #FFFDF7;
  border: 1px solid rgba(107,125,92,0.35);
  border-radius: 6px;
  padding: 24px;
  box-shadow: var(--jn-shadow);
}

.jn-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  background: rgba(15,110,106,0.12);
  color: var(--jn-teal);
  font-family: var(--jn-font-mono);
  font-size: 0.75rem;
  border: 1px solid rgba(15,110,106,0.2);
}

.jn-btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 4px;
  font-family: var(--jn-font-body);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.2s;
}

.jn-btn:hover {
  transform: translateY(-1px);
}

.jn-btn--primary {
  background: var(--jn-terra);
  color: #fff;
}

.jn-btn--primary:hover {
  background: #B06A3F;
}

.jn-btn--outline {
  border-color: var(--jn-moss);
  color: var(--jn-moss);
  background: transparent;
}

.jn-btn--outline:hover {
  background: var(--jn-moss);
  color: #fff;
}

.jn-breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--jn-gray);
}

.jn-breadcrumb a {
  color: var(--jn-teal);
  text-decoration: none;
}

.jn-breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--jn-gray);
}

.jn-prose {
  max-width: 72ch;
}

.jn-prose h2,
.jn-prose h3 {
  font-family: var(--jn-font-head);
  color: var(--jn-teal-deep);
  line-height: 1.4;
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}

.jn-prose p {
  margin-bottom: 1em;
}

.jn-table {
  width: 100%;
  border-collapse: collapse;
  background: #FFFDF7;
  border: 1px solid rgba(107,125,92,0.3);
}

.jn-table th,
.jn-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(107,125,92,0.2);
  font-size: 0.9rem;
}

.jn-table th {
  background: rgba(15,110,106,0.08);
  font-family: var(--jn-font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--jn-teal);
}

.jn-ratio {
  position: relative;
  overflow: hidden;
  border-radius: 6px;
  border: 1px solid rgba(107,125,92,0.3);
  background: linear-gradient(135deg, rgba(15,110,106,0.08), rgba(107,125,92,0.08));
}

.jn-ratio::before {
  content: "";
  display: block;
}

.jn-ratio--16x9::before {
  padding-top: 56.25%;
}

.jn-ratio--4x3::before {
  padding-top: 75%;
}

.jn-ratio--1x1::before {
  padding-top: 100%;
}

.jn-ratio__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 961px) {
  body {
    margin-left: var(--jn-header-w);
  }
}

@media (max-width: 1200px) and (min-width: 961px) {
  .jn-footer__wrap {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .jn-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 960px) {
  body {
    margin-left: 0;
  }

  .jn-header {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    min-height: 0;
    padding: 0;
    overflow: visible;
  }

  .jn-header__bar {
    padding: 12px 16px;
    justify-content: space-between;
  }

  .jn-nav-toggle {
    display: inline-flex;
  }

  .jn-nav {
    display: none;
    width: 100%;
    margin-top: 0;
    padding: 0 16px 12px;
  }

  .jn-nav[data-open] {
    display: flex;
    flex-direction: column;
  }

  .jn-nav__footnote {
    margin-top: 12px;
  }

  .jn-header-search {
    display: none;
  }

  .jn-backtop {
    right: 16px;
    bottom: 16px;
  }

  .jn-footer {
    padding: 48px 24px 24px;
  }

  .jn-footer__wrap {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .jn-footer__brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }
}

@media (max-width: 600px) {
  .jn-container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .jn-section {
    padding: 40px 0;
  }

  .jn-grid--2,
  .jn-grid--3 {
    grid-template-columns: 1fr;
  }

  .jn-footer__wrap {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .jn-footer__brand {
    grid-column: auto;
  }

  .jn-footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .jn-footer__legal {
    justify-content: center;
  }

  .jn-breadcrumb {
    font-size: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}