:root{
  --deep:#0E2A47;
  --night:#173F5F;
  --tide:#3D6E8F;
  --coral:#F08A8A;
  --gold:#D8A657;
  --mist:#F7F4EF;
  --paper:#FFFDF8;
  --ink:#2B2B2F;
  --salt:#9BAAB8;
  --reef:#071A2B;
  --wrap:1180px;
  --serif:"Songti SC","SimSun","Source Han Serif SC","Noto Serif CJK SC",Georgia,serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:140px;
}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--mist);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
a,button{transition:color .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),opacity .22s var(--ease)}
:where(a,button,[tabindex]):focus-visible{
  outline:2px solid var(--coral);
  outline-offset:3px;
  border-radius:2px;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--serif);
  font-weight:600;
  color:var(--deep);
  line-height:1.25;
}
h1{font-size:clamp(2rem,4.4vw,3.5rem);letter-spacing:.1em}
h2{font-size:clamp(1.5rem,2.8vw,2.5rem);letter-spacing:.08em}
h3{font-size:clamp(1.15rem,1.7vw,1.4rem);letter-spacing:.06em}
h4{font-size:clamp(1rem,1.3vw,1.15rem);letter-spacing:.06em}
p{line-height:1.75}

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

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,56px);
}

.eyebrow{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.2em;
  color:var(--tide);
}
.label-mono{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--salt);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 22px;
  font-family:var(--sans);
  font-size:14px;
  font-weight:500;
  letter-spacing:.08em;
  line-height:1;
  border:1px solid transparent;
  border-radius:2px;
  text-align:center;
  cursor:pointer;
}
.btn--coral{
  background:var(--coral);
  border-color:var(--coral);
  color:#2b1414;
  font-weight:600;
}
.btn--coral:hover{background:#f7a6a6;border-color:#f7a6a6}
.btn--ghost{
  background:transparent;
  border-color:rgba(240,138,138,.55);
  color:var(--mist);
}
.btn--ghost:hover{background:rgba(240,138,138,.16);border-color:var(--coral);color:#fff}
.btn--quiet{
  background:transparent;
  border-color:rgba(14,42,71,.28);
  color:var(--deep);
}
.btn--quiet:hover{background:var(--deep);border-color:var(--deep);color:var(--mist)}
.btn--gold{
  background:var(--gold);
  border-color:var(--gold);
  color:#241a08;
  font-weight:600;
}
.btn--gold:hover{background:#e6b871;border-color:#e6b871}

.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:300;
  padding:10px 18px;
  background:var(--coral);
  color:#2b1414;
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  border-radius:2px;
  transform:translateY(-220%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ============ 头部命令栏 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,#102E4D 0%,#0E2A47 58%,#0B2239 100%);
  color:var(--mist);
  border-bottom:1px solid rgba(216,166,87,.34);
  box-shadow:0 10px 30px rgba(7,26,43,.18);
}

.cmd-bar{
  background:var(--reef);
  border-bottom:1px solid rgba(155,170,184,.18);
}
.cmd-bar__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:6px clamp(12px,3vw,40px);
  min-height:32px;
  padding-block:5px;
}
.cmd-bar__meta{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.13em;
  color:var(--salt);
  line-height:1.5;
  white-space:nowrap;
}
.cmd-bar__dot{
  display:inline-block;
  width:6px;height:6px;
  margin-right:8px;
  border-radius:50%;
  background:var(--coral);
  box-shadow:0 0 0 3px rgba(240,138,138,.18);
  vertical-align:middle;
  animation:dot-breathe 3.6s ease-in-out infinite;
}
@keyframes dot-breathe{
  0%,100%{opacity:1}
  50%{opacity:.42}
}

.cmd-main{position:relative}
.cmd-main__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(14px,2.4vw,36px);
  min-height:78px;
  padding-block:12px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:13px;
  flex:0 0 auto;
}
.brand__mark{
  position:relative;
  display:grid;
  place-items:center;
  width:44px;height:44px;
  font-family:var(--serif);
  font-size:1.16rem;
  letter-spacing:0;
  color:var(--coral);
  background:rgba(240,138,138,.09);
  border:1px solid rgba(240,138,138,.55);
  border-radius:1px;
  transition:background-color .3s var(--ease),border-color .3s var(--ease);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:4px;
  border:1px solid rgba(216,166,87,.42);
  pointer-events:none;
}
.brand:hover .brand__mark{
  background:rgba(240,138,138,.18);
  border-color:var(--coral);
}
.brand__text{display:flex;flex-direction:column;gap:3px}
.brand__name{
  font-family:var(--serif);
  font-size:1.06rem;
  letter-spacing:.16em;
  color:var(--mist);
  line-height:1.2;
}
.brand__sub{
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--salt);
  line-height:1.4;
}

.nav{
  display:flex;
  align-items:center;
  gap:clamp(16px,2.2vw,32px);
}
.nav__list{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.5vw,24px);
}
.nav__item{flex:0 0 auto}
.nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:6px 0;
  font-size:14px;
  letter-spacing:.04em;
  color:rgba(247,244,239,.76);
  white-space:nowrap;
}
.nav__idx{
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--gold);
  opacity:.78;
}
.nav__link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--coral);
  transition:width .3s var(--ease);
}
.nav__link:hover{color:#fff}
.nav__link:hover::after{width:100%}
.nav__link[aria-current="page"]{color:#fff}
.nav__link[aria-current="page"] .nav__idx{color:var(--coral);opacity:1}
.nav__link[aria-current="page"]::after{width:100%}
.nav__cta{
  padding:10px 16px;
  font-size:13px;
  letter-spacing:.1em;
  flex:0 0 auto;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  background:rgba(240,138,138,.1);
  border:1px solid rgba(240,138,138,.5);
  border-radius:2px;
  color:var(--mist);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.18em;
}
.nav-toggle:hover{border-color:var(--coral);background:rgba(240,138,138,.2)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{
  display:block;
  height:1.5px;
  background:var(--coral);
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(2.75px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){transform:translateY(-2.75px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

.cmd-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:rgba(155,170,184,.16);
  pointer-events:none;
}
.cmd-progress__bar{
  display:block;
  width:100%;height:100%;
  background:linear-gradient(90deg,var(--gold) 0%,var(--coral) 100%);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .12s linear;
}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:clamp(48px,8vw,96px);
  background:var(--reef);
  color:var(--salt);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(120% 90% at 88% -12%,rgba(61,110,143,.42) 0%,rgba(61,110,143,0) 62%),
    radial-gradient(90% 80% at 2% 112%,rgba(240,138,138,.13) 0%,rgba(240,138,138,0) 66%);
  pointer-events:none;
}
.site-footer::after{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,rgba(216,166,87,0) 0%,rgba(216,166,87,.55) 42%,rgba(216,166,87,0) 100%);
  pointer-events:none;
}
.footer__inner{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(40px,6vw,74px) clamp(18px,4vw,56px) 0;
}
.footer__top{
  display:grid;
  grid-template-columns:minmax(0,1.55fr) repeat(3,minmax(0,.75fr));
  gap:clamp(24px,3.6vw,50px);
  padding-bottom:clamp(28px,4vw,48px);
  border-bottom:1px solid rgba(155,170,184,.2);
}
.footer__brand{min-width:0}
.footer__eyebrow{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--gold);
  margin-bottom:12px;
}
.footer__name{
  font-family:var(--serif);
  font-size:clamp(1.4rem,2.4vw,1.9rem);
  letter-spacing:.16em;
  color:var(--mist);
  line-height:1.3;
}
.footer__desc{
  margin-top:14px;
  max-width:30em;
  font-size:14px;
  line-height:1.85;
  color:rgba(155,170,184,.92);
}
.footer__cta{margin-top:20px}
.footer__col{min-width:0}
.footer__col-title{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(247,244,239,.62);
  padding-bottom:12px;
  margin-bottom:14px;
  border-bottom:1px dashed rgba(155,170,184,.26);
}
.footer__list li + li{margin-top:10px}
.footer__list a{
  display:inline-block;
  font-size:14px;
  line-height:1.6;
  color:rgba(247,244,239,.74);
  border-bottom:1px solid transparent;
  padding-bottom:1px;
}
.footer__list a:hover{color:var(--coral);border-bottom-color:rgba(240,138,138,.55)}
.footer__contact li{
  margin-top:12px;
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.04em;
  line-height:1.7;
  color:rgba(247,244,239,.82);
  word-break:break-word;
}
.footer__contact li:first-child{margin-top:0}
.footer__contact span{
  display:block;
  margin-bottom:3px;
  font-family:var(--sans);
  font-size:11px;
  letter-spacing:.18em;
  color:rgba(155,170,184,.9);
}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 26px;
  padding:20px 0 28px;
}
.footer__legal{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.06em;
  line-height:1.7;
  color:rgba(155,170,184,.85);
}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:9px 15px;
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--mist);
  background:transparent;
  border:1px solid rgba(155,170,184,.42);
  border-radius:2px;
}
.to-top::after{content:"↑";color:var(--gold);font-size:13px;line-height:1}
.to-top:hover{border-color:var(--gold);color:#fff;background:rgba(216,166,87,.12)}

/* ============ 通用排版与组件 ============ */
.section{padding-block:clamp(36px,5.5vw,72px)}
.section__head{
  display:grid;
  gap:12px;
  margin-bottom:clamp(20px,3vw,36px);
}
.prose{
  max-width:38em;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
}
.prose > * + *{margin-top:1.05em}
.prose h2,.prose h3{margin-top:1.7em}
.prose a{color:var(--tide);border-bottom:1px solid rgba(61,110,143,.45)}
.prose a:hover{color:var(--deep);border-bottom-color:var(--coral)}

.rule{
  height:1px;
  border:0;
  margin:clamp(26px,4vw,48px) 0;
  background:linear-gradient(90deg,rgba(14,42,71,.28) 0%,rgba(14,42,71,0) 100%);
}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--aside{grid-template-columns:minmax(0,.85fr) minmax(0,2.4fr) minmax(0,.7fr)}

.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:var(--paper);
  border:1px solid rgba(14,42,71,.13);
  border-radius:1px;
  box-shadow:0 1px 0 rgba(14,42,71,.04),0 14px 26px -22px rgba(14,42,71,.6);
}
.panel::before{
  content:"";
  position:absolute;
  left:-1px;top:-1px;
  width:36px;height:3px;
  background:var(--coral);
}
.panel__head{margin-bottom:12px}
.panel__body{
  font-size:14.5px;
  line-height:1.8;
  color:#4a4a52;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--tide);
  border:1px solid rgba(61,110,143,.45);
  border-radius:2px;
  line-height:1.5;
}
.tag--gold{
  color:#8a5f16;
  border-color:rgba(216,166,87,.62);
  background:rgba(216,166,87,.13);
}
.tag--coral{
  color:#a1362f;
  border-color:rgba(240,138,138,.7);
  background:rgba(240,138,138,.16);
}

.media{position:relative;min-width:0}
.media__frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  background:
    linear-gradient(150deg,#dfe7ec 0%,#cbd9e2 40%,#e6d8d2 74%,#f2e7dd 100%);
  border:1px solid rgba(14,42,71,.15);
  border-radius:1px;
  box-shadow:14px 14px 0 -1px rgba(14,42,71,.08);
}
.media__frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    repeating-linear-gradient(115deg,rgba(255,255,255,.16) 0 2px,rgba(255,255,255,0) 2px 7px);
  mix-blend-mode:screen;
  pointer-events:none;
}
.media__img{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
}
.media__caption{
  margin-top:11px;
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.06em;
  line-height:1.7;
  color:var(--salt);
}
.media--wide .media__frame{aspect-ratio:21 / 9}
.media--tall .media__frame{aspect-ratio:4 / 5}

.breadcrumbs{
  padding-block:clamp(14px,2vw,22px);
}
.breadcrumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:4px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--salt);
}
.breadcrumbs__item{
  display:inline-flex;
  align-items:center;
}
.breadcrumbs__item::after{
  content:"/";
  margin-left:6px;
  color:rgba(155,170,184,.65);
}
.breadcrumbs__item:last-child::after{content:none}
.breadcrumbs__link{
  color:var(--tide);
  border-bottom:1px solid transparent;
}
.breadcrumbs__link:hover{color:var(--deep);border-bottom-color:var(--coral)}
.breadcrumbs__item[aria-current="page"]{color:var(--ink)}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .footer__top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__brand{grid-column:1 / -1}
  .grid--aside{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:960px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:880px){
  html{scroll-padding-top:112px}
  .nav-toggle{display:inline-flex}
  .cmd-main__inner{min-height:68px;gap:12px}
  .nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:block;
    max-height:calc(100vh - 108px);
    overflow-y:auto;
    padding:10px clamp(18px,5vw,40px) 22px;
    background:linear-gradient(180deg,#173F5F 0%,#123353 100%);
    border-bottom:1px solid rgba(216,166,87,.42);
    box-shadow:0 26px 48px rgba(7,26,43,.42);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    pointer-events:none;
    transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
  }
  .nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
    pointer-events:auto;
  }
  .nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav__item{border-bottom:1px dashed rgba(155,170,184,.24)}
  .nav__item:last-child{border-bottom:0}
  .nav__link{
    width:100%;
    padding:14px 2px;
    font-size:15px;
  }
  .nav__link::after{bottom:9px;height:1px}
  .nav__idx{font-size:10.5px}
  .nav__cta{
    width:100%;
    margin-top:18px;
    padding:14px 18px;
    font-size:14px;
  }
  .brand__mark{width:40px;height:40px;font-size:1.05rem}
  .brand__name{font-size:1rem;letter-spacing:.14em}
}
@media (max-width:720px){
  body{font-size:15.5px}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .footer__top{grid-template-columns:minmax(0,1fr)}
  .footer__brand{grid-column:auto}
  .media__frame{box-shadow:8px 8px 0 -1px rgba(14,42,71,.08)}
}
@media (max-width:600px){
  .cmd-bar__meta{font-size:10px;letter-spacing:.08em}
  .cmd-bar__inner{min-height:auto;padding-block:6px}
  .cmd-bar__meta:nth-child(3){display:none}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .to-top{width:100%;justify-content:center}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .cmd-progress__bar{transition:none}
  .nav{transition:none}
}