:root{
  --c-sea-blue:#1C789A;
  --c-deep-sea:#0E4C64;
  --c-coconut:#3A7D5D;
  --c-sand:#D9A441;
  --c-coral:#F28B72;
  --c-red:#E4573D;
  --c-ivory:#F7F4EC;
  --c-fog:#E1E9EC;
  --c-ink:#1C2B30;
  --c-moss:#B7C9B7;
  --radius:8px;
  --shadow:0 4px 12px rgba(28,43,48,.08);
  --max-width:1280px;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.7;
  color:var(--c-ink);
  background:var(--c-ivory);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  -webkit-font-smoothing:antialiased;
}

main{
  display:block;
  flex:1 0 auto;
}

h1,h2,h3,h4,h5,h6{
  margin:0 0 .5em;
  font-weight:900;
  line-height:1.2;
  color:var(--c-ink);
}

h1{font-size:clamp(2.5rem,5vw,4.5rem);}
h2{font-size:clamp(2rem,4vw,3rem);}
h3{font-size:1.5rem;}
p{overflow-wrap:break-word;}

a{
  color:var(--c-sea-blue);
  text-underline-offset:2px;
  text-decoration-thickness:1px;
}

a:hover{
  color:var(--c-deep-sea);
}

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

ul,ol{
  margin:0 0 1em;
  padding-left:1.25rem;
}

button{
  font-family:inherit;
  font-size:inherit;
  color:inherit;
  background:none;
  border:0;
  cursor:pointer;
}

.container{
  width:100%;
  max-width:var(--max-width);
  margin-inline:auto;
  padding-inline:24px;
}

.visually-hidden{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

.skip-link{
  position:absolute;
  left:-999px;
  top:0;
  z-index:200;
  background:var(--c-sand);
  color:var(--c-ink);
  font-weight:700;
  padding:8px 16px;
  border-radius:0 0 8px 0;
  text-decoration:none;
}

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

a:focus-visible,
button:focus-visible{
  outline:3px solid var(--c-sand);
  outline-offset:2px;
}

/* 头部框架导航 */
.site-header{
  position:relative;
  background:linear-gradient(135deg,var(--c-deep-sea) 0%,var(--c-sea-blue) 70%,var(--c-sea-blue) 100%);
  box-shadow:0 2px 10px rgba(14,76,100,.25);
}

.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  background:linear-gradient(90deg,var(--c-sand) 0%,var(--c-sand) 40%,var(--c-red) 40%,var(--c-red) 62%,var(--c-coconut) 62%,var(--c-coconut) 100%);
}

.site-header__inner{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:16px 24px;
  padding-top:16px;
  padding-bottom:16px;
}

.site-brand{
  display:inline-flex;
  flex-direction:column;
  gap:2px;
  line-height:1;
  text-decoration:none;
  margin-right:auto;
}

.site-brand__name{
  font-size:1.55rem;
  font-weight:900;
  letter-spacing:.03em;
  color:#fff;
}

.site-brand__tag{
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.24em;
  color:rgba(255,255,255,.72);
  text-transform:uppercase;
}

.site-nav{
  display:block;
}

.site-nav__list{
  display:flex;
  align-items:center;
  gap:4px 26px;
  list-style:none;
  margin:0;
  padding:0;
}

.site-nav__list a{
  display:inline-block;
  padding:8px 2px;
  color:#fff;
  font-weight:600;
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:border-color .18s ease,opacity .18s ease;
}

.site-nav__list a:hover{
  border-bottom-color:var(--c-sand);
  opacity:.9;
}

.site-nav__list a[aria-current="page"]{
  border-bottom-color:var(--c-sand);
  color:var(--c-sand);
}

.nav-toggle{
  display:none;
  width:46px;
  height:46px;
  padding:10px;
  flex-direction:column;
  justify-content:space-between;
  align-items:stretch;
  border-radius:6px;
  transition:background-color .18s ease;
}

.nav-toggle:hover{
  background:rgba(255,255,255,.1);
}

.nav-toggle__bar{
  display:block;
  height:2px;
  border-radius:2px;
  background:#fff;
  transition:transform .18s ease,opacity .18s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){
  transform:translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){
  opacity:0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
}

.site-rail{
  position:fixed;
  left:10px;
  top:50%;
  transform:translateY(-50%);
  z-index:50;
  pointer-events:none;
  display:flex;
  flex-direction:column;
  align-items:center;
  background:rgba(247,244,236,.55);
  border-radius:10px;
  padding:14px 4px;
  backdrop-filter:blur(2px);
}

.site-rail__slogan{
  writing-mode:vertical-rl;
  font-size:12px;
  font-weight:600;
  letter-spacing:.22em;
  color:rgba(14,76,100,.7);
  border-left:1px solid rgba(14,76,100,.25);
  padding-left:6px;
}

.site-version{
  position:fixed;
  left:8px;
  bottom:8px;
  z-index:50;
  pointer-events:none;
  font-size:11px;
  letter-spacing:.08em;
  color:rgba(255,255,255,.85);
  background:rgba(14,76,100,.75);
  padding:2px 10px;
  border-radius:999px;
  box-shadow:0 2px 6px rgba(14,76,100,.25);
  white-space:nowrap;
}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:3px;
  z-index:1000;
  pointer-events:none;
  background:linear-gradient(90deg,var(--c-sand) 0%,var(--c-red) 50%,var(--c-coral) 100%);
  transform:scaleX(0);
  transform-origin:left center;
}

/* 页脚 */
.site-footer{
  background:var(--c-deep-sea);
  color:rgba(247,244,236,.88);
  padding-top:48px;
  padding-bottom:24px;
  margin-top:auto;
}

.site-footer__inner{
  display:grid;
  grid-template-columns:1.2fr 1.8fr 1.4fr;
  gap:32px 48px;
}

.site-footer__brand{
  display:flex;
  flex-direction:column;
}

.site-footer__logo{
  margin:0;
  font-size:1.45rem;
  font-weight:900;
  color:#fff;
  line-height:1.2;
}

.site-footer__logo small{
  display:block;
  margin-top:4px;
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.22em;
  color:rgba(255,255,255,.65);
}

.site-footer__slogan{
  margin-top:12px;
  font-size:.9rem;
  color:var(--c-sand);
}

.site-footer__nav h2{
  margin:0;
}

.site-footer__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:6px 20px;
}

.site-footer__list a{
  color:rgba(255,255,255,.82);
  text-decoration:none;
  font-size:.92rem;
  transition:color .18s ease;
}

.site-footer__list a:hover{
  color:var(--c-sand);
}

.site-footer__contact h2{
  margin:0;
}

.site-footer__contact-item{
  margin:0 0 8px;
  font-size:.9rem;
  line-height:1.5;
  color:rgba(255,255,255,.76);
}

.site-footer__meta{
  border-top:1px solid rgba(255,255,255,.14);
  margin-top:40px;
  padding-top:16px;
  font-size:.78rem;
  color:rgba(255,255,255,.55);
  text-align:center;
}

.site-footer__meta p{
  margin:4px 0;
}

/* 通用排版与组件 */
.section{
  padding:80px 0;
}

.section--tight{
  padding:48px 0;
}

.eyebrow{
  display:block;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-coconut);
  margin-bottom:8px;
}

.headline{
  margin-bottom:.5em;
}

.lead{
  max-width:70ch;
  font-size:1.12rem;
  line-height:1.75;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 26px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-weight:700;
  font-size:.95rem;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}

.btn--primary{
  background:var(--c-red);
  color:#fff;
  box-shadow:0 4px 12px rgba(228,87,61,.25);
}

.btn--primary:hover{
  background:#c94a32;
  color:#fff;
  box-shadow:0 6px 16px rgba(228,87,61,.3);
}

.btn--secondary{
  background:var(--c-sea-blue);
  color:#fff;
}

.btn--secondary:hover{
  background:var(--c-deep-sea);
  color:#fff;
}

.btn--ghost{
  background:transparent;
  border-color:var(--c-sea-blue);
  color:var(--c-sea-blue);
}

.btn--ghost:hover{
  background:var(--c-fog);
  color:var(--c-deep-sea);
}

.card{
  background:#fff;
  border:1px solid var(--c-fog);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow);
}

.card--floating{
  box-shadow:0 8px 24px rgba(14,76,100,.12);
}

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

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

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

.figure{
  position:relative;
  margin:0;
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--c-fog);
  aspect-ratio:16/9;
}

.figure--square{
  aspect-ratio:1/1;
}

.figure--tall{
  aspect-ratio:4/5;
}

.figure__img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .18s ease;
}

.figure:hover .figure__img{
  transform:scale(1.02);
}

.figure__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:10px 14px;
  font-size:.8rem;
  color:#fff;
  background:linear-gradient(transparent,rgba(14,76,100,.75));
}

.wave-line{
  height:3px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--c-sand),var(--c-coral),var(--c-coconut));
}

@media (max-width:768px){
  .site-header__inner{
    align-items:center;
  }

  .nav-toggle{
    display:flex;
  }

  .site-nav{
    display:none;
    position:absolute;
    left:0;
    right:0;
    top:100%;
    z-index:150;
    background:var(--c-deep-sea);
    padding:16px 24px;
    box-shadow:0 12px 24px rgba(14,76,100,.25);
  }

  .site-nav[data-open]{
    display:block;
  }

  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }

  .site-nav__list li + li{
    border-top:1px solid rgba(255,255,255,.1);
  }

  .site-nav__list a{
    display:block;
    padding:12px 0;
    font-size:1.05rem;
    border-bottom:0;
  }

  .site-nav__list a[aria-current="page"]{
    border-bottom:0;
    color:var(--c-sand);
  }

  .site-footer__inner{
    grid-template-columns:1fr;
    gap:32px;
  }

  .site-footer__list{
    grid-template-columns:1fr 1fr;
  }
}

@media (max-width:1023px){
  .site-rail,
  .site-version{
    display:none;
  }
}

@media (max-width:560px){
  .grid--2,
  .grid--3{
    grid-template-columns:1fr;
  }

  .site-footer__list{
    grid-template-columns:1fr;
  }
}

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

  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
}