:root{
  --sky-blue: #3A7CA5;
  --sun-gold: #F5A623;
  --azalea: #D94F5A;
  --rock-gray: #6B6B6B;
  --moss-green: #7A8B5C;
  --terracotta: #C77B5A;
  --rice-white: #FAF6EF;
  --deep-sky: #1F3A5F;
  --color-bg: var(--rice-white);
  --color-text: var(--rock-gray);
  --color-heading: var(--deep-sky);
  --font-title: "Space Grotesk", "思源黑体", sans-serif;
  --font-body: "思源黑体", "Noto Sans SC", sans-serif;
  --container: 1200px;
  --header-height: 72px;
  --radius: 12px;
  --transition: .25s ease;
  --shadow: 0 8px 24px rgba(31,58,95,.08);
}

*{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  color:var(--color-text);
  line-height:1.7;
  background-color:var(--rice-white);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(245,166,35,.10), transparent 25%),
    radial-gradient(circle at 85% 70%, rgba(58,124,165,.10), transparent 32%);
}

h1,h2,h3,h4,h5,h6{
  margin-top:0;
  font-family:var(--font-title);
  color:var(--color-heading);
  line-height:1.25;
}

p{
  margin-top:0;
}

a{
  color:var(--sky-blue);
}

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

::selection{
  background:var(--sun-gold);
  color:var(--deep-sky);
}

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

.u-container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 1.25rem;
}

.section{
  padding:3.5rem 0;
}

.grid{
  display:grid;
  gap:1.5rem;
}

.grid--2{
  grid-template-columns:repeat(2, minmax(0, 1fr));
}

.grid--3{
  grid-template-columns:repeat(3, minmax(0, 1fr));
}

.card{
  padding:1.5rem;
  background:#fff;
  border:1px solid rgba(122,139,92,.25);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.card__title{
  margin-bottom:.5rem;
}

.tag{
  display:inline-block;
  padding:.2em .7em;
  border-radius:999px;
  background:rgba(58,124,165,.12);
  color:var(--sky-blue);
  font-size:.8rem;
  font-weight:600;
  line-height:1.4;
}

.btn{
  display:inline-block;
  padding:.6em 1.25em;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-body);
  font-size:.95rem;
  font-weight:600;
  line-height:1.2;
  text-decoration:none;
  transition:background var(--transition), color var(--transition), box-shadow var(--transition);
}

.btn-primary{
  background:var(--sun-gold);
  color:var(--deep-sky);
  box-shadow:0 4px 14px rgba(245,166,35,.35);
}

.btn-primary:hover{
  background:#FFC145;
  box-shadow:0 6px 18px rgba(245,166,35,.45);
}

.btn-outline{
  border-color:var(--sky-blue);
  color:var(--sky-blue);
}

.btn-outline:hover{
  background:rgba(58,124,165,.1);
}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:.25rem;
  max-width:var(--container);
  margin:1.25rem auto 0;
  padding:0 1.25rem;
  list-style:none;
  font-size:.9rem;
}

.breadcrumbs li + li::before{
  content:"/";
  margin:0 .45rem;
  color:var(--moss-green);
}

.breadcrumbs a{
  color:var(--moss-green);
  text-decoration:none;
}

.breadcrumbs a:hover{
  color:var(--sky-blue);
}

.breadcrumbs [aria-current="page"]{
  color:var(--deep-sky);
  font-weight:600;
}

.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid rgba(122,139,92,.28);
  border-radius:var(--radius);
  background:linear-gradient(135deg, rgba(245,166,35,.16), rgba(58,124,165,.14));
}

.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.media-frame--16x9{
  aspect-ratio:16 / 9;
}

.media-frame--4x3{
  aspect-ratio:4 / 3;
}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:
    radial-gradient(circle at 18% 150%, rgba(245,166,35,.16), transparent 30%),
    rgba(250,246,239,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(122,139,92,.25);
  transition:background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.site-header.is-scrolled{
  background:
    radial-gradient(circle at 18% 150%, rgba(245,166,35,.10), transparent 28%),
    var(--rice-white);
  box-shadow:0 2px 18px rgba(31,58,95,.12);
  border-bottom-color:rgba(58,124,165,.18);
}

.site-header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  max-width:var(--container);
  min-height:var(--header-height);
  margin:0 auto;
  padding:0 1.25rem;
}

.scroll-progress{
  position:absolute;
  top:0;
  left:0;
  right:0;
  z-index:2;
  height:3px;
  background:linear-gradient(to right, var(--sky-blue), var(--sun-gold));
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

.site-brand{
  display:inline-flex;
  align-items:center;
  gap:.75rem;
  flex-shrink:0;
  color:var(--deep-sky);
  text-decoration:none;
}

.site-brand__mark{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  border-radius:50%;
  background:linear-gradient(135deg, var(--sky-blue), var(--sun-gold));
  color:#fff;
  font-family:var(--font-title);
  font-size:1.25rem;
  box-shadow:0 4px 14px rgba(58,124,165,.32);
}

.site-brand__text{
  font-family:var(--font-title);
  font-size:1.2rem;
  font-weight:700;
  line-height:1.1;
  letter-spacing:.04em;
}

.site-brand__text small{
  display:block;
  margin-top:.1rem;
  font-size:.65rem;
  letter-spacing:.18em;
  color:var(--sky-blue);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.5rem;
  background:none;
  border:0;
  border-radius:.5rem;
  font-family:var(--font-body);
  font-size:.9rem;
  font-weight:600;
  color:var(--deep-sky);
  cursor:pointer;
}

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

.nav-toggle__icon::before,
.nav-toggle__icon::after{
  content:'';
  position:absolute;
  left:0;
  width:20px;
  height:2px;
  background:currentColor;
  transition:transform .3s ease;
}

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

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

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

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before{
  transform:translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after{
  transform:translateY(-6px) rotate(-45deg);
}

.site-nav__list{
  display:flex;
  align-items:center;
  gap:.25rem;
  margin:0;
  padding:0;
  list-style:none;
}

.site-nav a{
  display:block;
  padding:.55rem .95rem;
  border-radius:999px;
  font-family:var(--font-title);
  font-size:.95rem;
  font-weight:500;
  color:var(--deep-sky);
  text-decoration:none;
  transition:background .2s, color .2s;
}

.site-nav a:hover{
  background:rgba(58,124,165,.12);
  color:var(--sky-blue);
}

.site-nav a[aria-current="page"]{
  background:var(--deep-sky);
  color:#fff;
}

.skip-link{
  position:absolute;
  top:0;
  left:-999px;
  z-index:200;
  padding:.5rem 1rem;
  border-radius:0 0 .5rem .5rem;
  background:var(--deep-sky);
  color:#fff;
  font-weight:600;
  text-decoration:none;
}

.skip-link:focus{
  left:0;
}

.site-footer{
  padding:3.5rem 1.25rem 2rem;
  background:
    radial-gradient(circle at 88% 115%, rgba(245,166,35,.22), transparent 34%),
    radial-gradient(circle at 10% -30%, rgba(58,124,165,.38), transparent 45%),
    var(--deep-sky);
  color:rgba(250,246,239,.86);
  font-size:.95rem;
}

.site-footer a{
  color:var(--sun-gold);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s, border-color .2s;
}

.site-footer a:hover{
  color:#fff;
  border-bottom-color:var(--sun-gold);
}

.site-footer__top{
  display:grid;
  grid-template-columns:2fr 1fr 1.5fr;
  gap:2.5rem;
  max-width:var(--container);
  margin:0 auto 3rem;
}

.site-footer__brand{
  max-width:34rem;
}

.site-footer__logo{
  margin-bottom:1rem;
  font-family:var(--font-title);
  font-size:1.5rem;
  font-weight:700;
  color:#fff;
}

.site-footer__logo small{
  margin-left:.35rem;
  font-size:.75rem;
  letter-spacing:.14em;
  color:var(--sun-gold);
}

.site-footer__statement{
  color:rgba(250,246,239,.8);
  line-height:1.9;
}

.site-footer__heading{
  margin-bottom:1rem;
  font-family:var(--font-title);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.15em;
  text-transform:uppercase;
  color:var(--sun-gold);
}

.site-footer__links ul,
.site-footer__contact address{
  margin:0;
  padding:0;
  list-style:none;
}

.site-footer__links li{
  margin-bottom:.55rem;
}

.site-footer__contact address{
  font-style:normal;
  line-height:1.8;
}

.site-footer__bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:.75rem 2rem;
  max-width:var(--container);
  margin:0 auto;
  padding-top:1.5rem;
  border-top:1px solid rgba(250,246,239,.22);
  font-size:.85rem;
  color:rgba(250,246,239,.62);
}

.site-footer__bottom p{
  margin:0;
}

.back-to-top{
  position:fixed;
  right:1.5rem;
  bottom:1.5rem;
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.7rem 1.1rem;
  border:0;
  border-radius:999px;
  background:var(--sun-gold);
  color:var(--deep-sky);
  font-family:var(--font-body);
  font-size:.9rem;
  font-weight:700;
  cursor:pointer;
  box-shadow:0 8px 20px rgba(245,166,35,.45);
  opacity:0;
  visibility:hidden;
  transform:translateY(.5rem);
  transition:opacity .25s, transform .25s, visibility .25s;
}

.back-to-top.visible{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

.back-to-top:hover{
  background:#FFC145;
}

@media (max-width: 960px){
  .site-footer__top{
    grid-template-columns:1fr 1fr;
  }

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

@media (max-width: 860px){
  .nav-toggle{
    display:inline-flex;
  }

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin:0;
    padding:1rem;
    background:var(--rice-white);
    border-bottom:1px solid rgba(122,139,92,.3);
    box-shadow:0 12px 24px rgba(31,58,95,.15);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .25s, transform .25s, visibility .25s;
    pointer-events:none;
  }

  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
    pointer-events:auto;
  }

  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:.25rem;
  }

  .site-nav a{
    padding:.85rem 1rem;
    border-radius:.75rem;
  }
}

@media (max-width: 640px){
  .grid--2,
  .grid--3{
    grid-template-columns:1fr;
  }

  .site-footer__top{
    grid-template-columns:1fr;
    gap:2rem;
  }

  .site-footer__bottom{
    flex-direction:column;
  }

  .back-to-top{
    right:1rem;
    bottom:1rem;
  }
}

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

  *,
  *::before,
  *::after{
    transition:none !important;
    animation:none !important;
  }
}