/* ==============================
   ROOT
============================== */
:root {
  --navy:       #0D2350;
  --navy-mid:   #163070;
  --teal:       #0891B2;
  --teal-dark:  #0E7490;
  --teal-light: #E0F2FE;
  --white:      #FFFFFF;
  --gray-bg:    #F4F7FA;
  --text:       #1E293B;
  --text-muted: #64748B;
  --border:     #D9E4EE;
  --red:        #C53030;
  --red-bg:     #FFF5F5;
  --amber:      #B45309;
  --amber-bg:   #FFFBEB;
}

html:lang(zh-Hans),
html:lang(zh-TW) {
  --font-heading: "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", sans-serif;
}

/* ==============================
   RESET
============================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  font-family: 'Open Sans', sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
  padding-top: 70px;
}
h1,h2,h3,h4 { font-family: 'Raleway', sans-serif; line-height: 1.25; }
a { color: var(--teal); text-decoration: none; }
button, input, select, textarea { font-family: inherit; }
img { max-width: 100%; display: block; }

/* ==============================
   UTILITIES
============================== */
.container    { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; width: 100%; }
.container-sm { max-width: 780px;  margin: 0 auto; padding: 0 1.5rem; width: 100%; }
.section-pad  { padding: 90px 0; }
.gray-bg      { background: var(--gray-bg); }
.text-center  { text-align: center; }

.sec-head { margin-bottom: 3rem; }
.sec-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 1rem;
}
.sec-head p {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}
.separator {
  display: flex; align-items: center; justify-content: center;
  gap: 6px; margin: 0.875rem 0 1.25rem;
}
.separator span { display: block; height: 3px; background: var(--teal); }
.separator span:nth-child(1),
.separator span:nth-child(3) { width: 20px; opacity: 0.35; }
.separator span:nth-child(2) { width: 55px; }

/* ==============================
   BUTTONS
============================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 2.25rem;
  font-family: 'Raleway', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all 0.22s;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.14); }
.btn-primary { background: var(--teal); color: var(--white); }
.btn-primary:hover { background: var(--teal-dark); color: var(--white); }
.btn-white { background: var(--white); color: var(--navy); }
.btn-white:hover { background: var(--teal-light); color: var(--teal-dark); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.6); }
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: white; }

/* ==============================
   NAV
============================== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(13,35,80,0.06);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.5rem; height: 70px;
  max-width: 1100px; margin: 0 auto;
  gap: 1rem;
}
.nav-inner > a {
  display: flex;
  align-items: center;
}
.nav-logo {
  font-family: 'Raleway', sans-serif;
  font-size: 1.125rem; font-weight: 800;
  color: var(--navy);
  display: flex; align-items: center; gap: 0.5rem;
  min-width: 0;
  white-space: nowrap;
}
.nav-logo-icon {
  width: 34px; height: 34px;
  background: var(--teal);
  display: flex; align-items: center; justify-content: center;
  border-radius: 4px;
  flex: 0 0 auto;
}
.nav-logo-icon svg { width: 18px; height: 18px; fill: white; }
.nav-logo span { color: var(--teal); }
.nav-right { display: flex; align-items: center; gap: 0.875rem; flex: 0 0 auto; min-width: 0; }
.nav-links { display: none; align-items: center; list-style: none; gap: 1.75rem; }
.nav-links li {
  display: flex;
  align-items: center;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  font-family: 'Raleway', sans-serif;
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--text); transition: color 0.15s;
}
.nav-links a:hover { color: var(--teal); }
.lang-sel {
  font-size: 12px; color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.3rem 0.5rem;
  background: transparent; cursor: pointer;
  align-self: center;
}
.nav-menu { display: none; }
.nav-cta { padding: 0.625rem 1.5rem; font-size: 12px; align-self: center; }
.nav-auth-cta { display: none; }
@media (min-width: 900px) { .nav-links { display: flex; } }
@media (max-width: 640px) {
  body { padding-top: 98px; }
  .nav-inner {
    height: auto;
    min-height: 70px;
    flex-wrap: wrap;
    align-content: center;
    gap: 0.5rem 0.75rem;
    padding: 0.625rem 1rem;
  }
  .nav-logo {
    flex: 1 1 calc(100% - 6rem);
    font-size: 1rem;
    overflow: hidden;
  }
  .nav-logo-icon {
    width: 30px;
    height: 30px;
  }
  .nav-logo-icon svg {
    width: 16px;
    height: 16px;
  }
  .nav-right {
    display: contents;
  }
  .lang-sel {
    flex: 0 0 auto;
    width: 5.25rem;
    max-width: 34vw;
    min-width: 4.5rem;
    min-height: 40px;
  }
  .nav-menu {
    display: block;
    flex: 1 1 calc(50% - 0.375rem);
    min-width: 0;
    position: relative;
  }
  .nav-menu summary {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--border);
    color: var(--navy);
    font-family: 'Raleway', sans-serif;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    list-style: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .nav-menu summary::-webkit-details-marker { display: none; }
  .nav-menu summary::after {
    content: "";
    width: 0.45rem;
    height: 0.45rem;
    margin-left: 0.5rem;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: translateY(-2px) rotate(45deg);
    transition: transform 0.18s;
    flex: 0 0 auto;
  }
  .nav-menu[open] summary::after {
    transform: translateY(2px) rotate(225deg);
  }
  .nav-menu ul {
    position: absolute;
    top: calc(100% + 0.375rem);
    left: 0;
    z-index: 210;
    width: calc(200% + 0.75rem);
    list-style: none;
    background: var(--white);
    border: 1px solid var(--border);
    box-shadow: 0 12px 30px rgba(13,35,80,0.14);
  }
  .nav-menu a {
    display: block;
    padding: 0.75rem 0.875rem;
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    font-weight: 700;
    color: var(--text);
  }
  .nav-menu li:last-child a { border-bottom: 0; }
  .nav-cta {
    flex: 1 1 calc(50% - 0.375rem);
    min-height: 40px;
    min-width: 0;
    padding: 0.625rem 0.75rem;
    font-size: 12px;
    letter-spacing: 0.04em;
    white-space: nowrap;
  }
  .nav-booking-cta { display: none; }
  .nav-auth-cta { display: inline-flex; }
}
@media (min-width: 641px) {
  .nav-menu { display: none; }
}
@media (max-width: 360px) {
  .nav-inner { padding-inline: 0.75rem; }
  .nav-logo { font-size: 0.9375rem; }
  .lang-sel {
    width: 4.75rem;
    padding-inline: 0.375rem;
  }
  .nav-menu summary,
  .nav-cta {
    font-size: 11px;
    letter-spacing: 0.03em;
  }
}

/* ==============================
   FOOTER
============================== */
footer { background: #0A1929; }
.footer-top {
  padding: 2.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.footer-top-inner {
  display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.footer-logo-wrap {
  font-family: 'Raleway', sans-serif;
  font-size: 1.25rem; font-weight: 800; color: var(--white);
}
.footer-logo-wrap span { color: var(--teal); }
.footer-logo-small { font-size: 1rem; }
.footer-hotline { display: flex; align-items: center; gap: 0.875rem; }
.footer-hotline-icon {
  width: 44px; height: 44px; background: var(--teal);
  display: flex; align-items: center; justify-content: center;
  border-radius: 2px;
}
.footer-hotline-icon i { font-size: 20px; color: var(--white); }
.footer-hotline-text label {
  display: block; font-size: 11px;
  font-family: 'Raleway', sans-serif; font-weight: 700;
  letter-spacing: 0.07em; text-transform: uppercase;
  color: #7DD3FC; margin-bottom: 0.125rem; cursor: default;
}
.footer-hotline-text strong { font-size: 14px; color: var(--white); }
.footer-main {
  padding: 3.5rem 0;
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem;
}
@media (max-width: 768px) { .footer-main { grid-template-columns: 1fr; gap: 2rem; } }
.footer-about p { font-size: 13px; color: #64748B; line-height: 1.8; margin-top: 0.875rem; }
.footer-col h4 {
  font-family: 'Raleway', sans-serif;
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--white); margin-bottom: 1.125rem;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.625rem; }
.footer-col ul li a { font-size: 13px; color: #64748B; transition: color 0.15s; }
.footer-col ul li a:hover { color: var(--teal); }
.footer-emergency {
  font-size: 12px; color: #F87171;
  display: flex; align-items: center; gap: 0.5rem; margin-top: 1.25rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 1.25rem 0 2rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem;
}
.footer-bottom p { font-size: 12px; color: #374151; }
.footer-bottom-links { display: flex; gap: 1.25rem; }
.footer-bottom-links a { font-size: 12px; color: #374151; transition: color 0.15s; }
.footer-bottom-links a:hover { color: var(--teal); }