:root{
  --ink-900:#061A2E;
  --ink-800:#0B2A45;
  --paper:#F4FAFF;
  --ink-text:#0A1D31;
  --mist:#C7DCEB;
  --cyan:#32E1D0;
  --teal:#0E8F86;
  --orange:#FF8A3D;
  --violet:#6A6F8F;
  --line:#2E5675;
  --mint:#8FE3C1;
  --coral:#FFC7A8;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1240px;
  --gutter:clamp(18px,4.6vw,64px);
  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:12px;
  --radius-pill:999px;
  --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:96px;
}

body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}

img,svg,video{display:block;max-width:100%;height:auto}

h1,h2,h3,h4{
  margin:0 0 .6em;
  font-weight:800;
  line-height:1.22;
  letter-spacing:.015em;
  color:#fff;
}

h1{font-size:clamp(40px,5.8vw,88px);font-weight:900;letter-spacing:.02em;line-height:1.06}
h2{font-size:clamp(26px,3vw,40px)}
h3{font-size:clamp(20px,2.2vw,28px)}
h4{font-size:clamp(17px,1.6vw,20px)}

p{margin:0 0 1em}

a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--mint)}

ul,ol{margin:0 0 1em;padding-left:1.2em}

strong{font-weight:700;color:#fff}

::selection{background:rgba(50,225,208,.32);color:#fff}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

.mono{
  font-family:var(--font-mono);
  font-variant-ligatures:none;
  letter-spacing:.08em;
}

.shell{
  width:min(var(--shell),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
}

.skip-link{
  position:fixed;
  top:12px;
  left:12px;
  z-index:200;
  transform:translateY(-180%);
  padding:12px 22px;
  border-radius:var(--radius-pill);
  background:var(--cyan);
  color:var(--ink-900);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transition:transform .25s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);color:var(--ink-900)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:inherit;
  font-size:14.5px;
  font-weight:700;
  letter-spacing:.03em;
  line-height:1.4;
  text-decoration:none;
  cursor:pointer;
  transition:transform .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}

.btn--primary{
  background:var(--orange);
  color:var(--ink-900);
  box-shadow:0 14px 28px -16px rgba(255,138,61,.9);
}
.btn--primary:hover{background:#FFA063;color:var(--ink-900)}

.btn--ghost{
  background:rgba(11,42,69,.35);
  color:var(--paper);
  border-color:rgba(199,220,235,.3);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(50,225,208,.08)}

.btn--quiet{
  background:none;
  color:var(--cyan);
  padding-inline:2px;
  text-decoration:underline;
  text-underline-offset:5px;
}
.btn--quiet:hover{color:var(--mint)}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(6,26,46,.94) 0%,rgba(6,26,46,.6) 64%,rgba(6,26,46,0) 100%);
  border-bottom:1px solid transparent;
  transition:background .35s var(--ease),border-color .35s var(--ease),box-shadow .35s var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(11,42,69,.96);
  border-bottom-color:rgba(46,86,117,.7);
  box-shadow:0 22px 44px -36px rgba(0,0,0,.95);
}
@supports (backdrop-filter:blur(6px)){
  .site-header[data-scrolled]{backdrop-filter:blur(12px)}
}

.site-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,26px);
  padding-block:14px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
  color:#fff;
  text-decoration:none;
}
.brand:hover{color:#fff}

.brand__mark{
  position:relative;
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  border-radius:13px;
  background:radial-gradient(circle at 28% 22%,#5BF2E2,#0E8F86 78%);
  box-shadow:0 0 0 1px rgba(199,220,235,.22) inset,0 10px 24px -14px rgba(50,225,208,.95);
}
.brand__line{
  position:absolute;
  left:50%;
  top:50%;
  width:20px;
  height:2px;
  border-radius:2px;
  background:rgba(6,26,46,.45);
  transform:translate(-50%,-50%) rotate(-45deg);
}
.brand__dot{
  position:relative;
  z-index:1;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--ink-900);
}
.brand__text{display:flex;flex-direction:column;line-height:1.16}
.brand__name{font-size:17px;font-weight:800;letter-spacing:.05em;color:#fff}
.brand__meta{font-size:10.5px;letter-spacing:.12em;color:rgba(199,220,235,.62)}

.site-header__tagline{
  margin:0;
  font-size:11.5px;
  letter-spacing:.18em;
  white-space:nowrap;
  color:rgba(143,227,193,.72);
}

.site-nav{margin-inline:auto}

.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(2px,.9vw,14px);
  margin:0;
  padding:0;
  list-style:none;
}

.site-nav__link{
  display:inline-block;
  padding:9px 12px;
  border-radius:var(--radius-pill);
  font-size:14px;
  font-weight:500;
  color:rgba(244,250,255,.74);
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:#fff;background:rgba(199,220,235,.1)}
.site-nav__link[aria-current="page"]{
  color:var(--ink-900);
  background:var(--cyan);
  font-weight:700;
}

.site-header__aside{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

.status-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 13px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(46,86,117,.85);
  background:rgba(6,26,46,.55);
  font-size:11.5px;
  letter-spacing:.06em;
  color:rgba(199,220,235,.85);
  white-space:nowrap;
}
.status-pill__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(143,227,193,.16);
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  padding:0;
  margin-left:auto;
  border:1px solid rgba(46,86,117,.9);
  border-radius:14px;
  background:rgba(11,42,69,.7);
  color:var(--paper);
  cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}

.nav-toggle__bars{position:relative;display:block;width:18px;height:12px}
.nav-toggle__bars span{
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:top .26s var(--ease),transform .26s var(--ease),opacity .18s var(--ease);
}
.nav-toggle__bars span:nth-child(1){top:0}
.nav-toggle__bars span:nth-child(2){top:5px}
.nav-toggle__bars span:nth-child(3){top:10px}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){top:5px;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars span:nth-child(3){top:5px;transform:rotate(-45deg)}

.site-header__progress{
  position:relative;
  height:2px;
  overflow:hidden;
  background:rgba(46,86,117,.35);
}
.site-header__progress-bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--teal),var(--cyan) 58%,var(--orange));
  transition:transform .14s linear;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:#04121F;
  color:var(--paper);
  border-top:1px solid rgba(46,86,117,.45);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(50,225,208,.75),rgba(255,138,61,.55),transparent);
}

.site-footer__inner{padding-block:clamp(44px,6vw,84px) 26px}

.site-footer__top{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:clamp(26px,5vw,72px);
  padding-bottom:clamp(26px,4vw,46px);
  border-bottom:1px solid rgba(46,86,117,.42);
}

.site-footer__brand{
  margin:0 0 8px;
  font-size:clamp(22px,2.4vw,30px);
  font-weight:900;
  letter-spacing:.03em;
  color:#fff;
}
.site-footer__tag{
  margin:0 0 16px;
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--cyan);
}
.site-footer__summary{
  max-width:44ch;
  margin:0;
  font-size:15px;
  line-height:1.8;
  color:rgba(199,220,235,.78);
}

.site-footer__contact{display:grid;gap:12px;align-content:start}
.site-footer__contact-item{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px;
  font-size:14.5px;
}
.site-footer__contact-label{
  flex:0 0 auto;
  min-width:38px;
  font-size:11px;
  letter-spacing:.16em;
  color:rgba(143,227,193,.8);
}
.site-footer__contact-value{
  display:inline-flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  color:rgba(244,250,255,.9);
  word-break:break-word;
}

.copy-email{
  display:inline-flex;
  align-items:center;
  padding:3px 11px;
  border:1px solid rgba(50,225,208,.45);
  border-radius:var(--radius-pill);
  background:rgba(50,225,208,.1);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.6;
  cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.copy-email:hover{background:rgba(50,225,208,.22);border-color:var(--cyan);color:var(--mint)}

.copy-email__status{
  flex:1 1 100%;
  min-height:1.1em;
  font-size:12px;
  color:var(--mint);
}

.site-footer__note{
  margin:6px 0 0;
  max-width:46ch;
  font-size:12.5px;
  line-height:1.75;
  color:rgba(199,220,235,.58);
}

.site-footer__nav{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:clamp(22px,4vw,48px);
  padding-block:clamp(26px,4vw,42px);
  border-bottom:1px solid rgba(46,86,117,.42);
}

.site-footer__col-title{
  margin:0 0 14px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.18em;
  color:rgba(143,227,193,.85);
  text-transform:uppercase;
}

.site-footer__list{
  display:grid;
  gap:10px;
  margin:0;
  padding:0;
  list-style:none;
}
.site-footer__list a{
  font-size:14.5px;
  color:rgba(244,250,255,.82);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.site-footer__list a:hover,
.site-footer__list a:focus-visible{color:var(--cyan)}

.site-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 26px;
  padding-top:22px;
  font-size:12.5px;
  color:rgba(199,220,235,.55);
}
.site-footer__copy{margin:0}
.site-footer__legal-links{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  margin:0;
  padding:0;
  list-style:none;
}
.site-footer__legal-links a{color:inherit;text-decoration:none}
.site-footer__legal-links a:hover,
.site-footer__legal-links a:focus-visible{color:var(--cyan)}
.site-footer__icp{margin:0;font-size:11.5px;letter-spacing:.1em;color:rgba(199,220,235,.5)}

/* ---------- 通用组件 ---------- */
.breadcrumb{font-size:12.5px;color:rgba(199,220,235,.62)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumb__list li + li::before{
  content:"/";
  margin-right:8px;
  color:rgba(46,86,117,.95);
}
.breadcrumb a{color:inherit;text-decoration:none}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--mist)}

.prose{
  max-width:72ch;
  font-size:17px;
  line-height:1.85;
  color:rgba(244,250,255,.88);
}
.prose h2,
.prose h3{margin-top:1.8em;color:#fff}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:4px}
.prose li{margin-bottom:.4em}
.prose code{
  padding:2px 6px;
  border-radius:6px;
  background:rgba(46,86,117,.45);
  font-family:var(--font-mono);
  font-size:.88em;
  color:var(--mist);
}

.grid{display:grid;gap:clamp(18px,3vw,36px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:currentColor;
  opacity:.7;
}

.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border:1px solid rgba(46,86,117,.75);
  border-radius:var(--radius-pill);
  background:rgba(11,42,69,.55);
  font-size:12.5px;
  color:var(--mist);
}

.media-frame{
  position:relative;
  display:grid;
  place-items:center;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:1px solid rgba(46,86,117,.6);
  border-radius:var(--radius-lg);
  background-image:
    linear-gradient(rgba(46,86,117,.22) 1px,transparent 1px),
    linear-gradient(90deg,rgba(46,86,117,.22) 1px,transparent 1px),
    radial-gradient(120% 90% at 12% 8%,rgba(50,225,208,.18),transparent 58%),
    radial-gradient(90% 80% at 92% 100%,rgba(255,138,61,.14),transparent 62%),
    linear-gradient(160deg,#0B2A45,#061A2E);
  background-size:46px 46px,46px 46px,cover,cover,cover;
}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:inherit;
}
.media-frame__caption{
  position:absolute;
  left:16px;
  bottom:14px;
  margin:0;
  padding:5px 12px;
  border-radius:var(--radius-pill);
  background:rgba(6,26,46,.72);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:rgba(199,220,235,.85);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--soft{
  border-radius:var(--radius-md);
  border-color:rgba(10,29,49,.08);
  background-image:linear-gradient(160deg,#F4FAFF,#DCEBF6);
}

.spy-link{
  display:block;
  padding:8px 12px;
  border-left:2px solid transparent;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:13.5px;
  color:rgba(199,220,235,.66);
  text-decoration:none;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.spy-link:hover{color:var(--paper);background:rgba(199,220,235,.07)}
.spy-link.is-active{
  color:var(--cyan);
  border-left-color:var(--cyan);
  background:rgba(50,225,208,.08);
}

.has-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .45s var(--ease),transform .45s var(--ease);
}
.has-js [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ---------- 响应式 ---------- */
@media (max-width:1399px){
  .site-header__tagline{display:none}
}

@media (max-width:1279px){
  .site-header .status-pill{display:none}
}

@media (min-width:900px) and (max-width:1159px){
  .site-header__aside .btn--ghost{display:none}
}

@media (max-width:899px){
  .site-header__inner{
    flex-wrap:wrap;
    row-gap:4px;
    padding-block:11px;
  }
  .site-header .status-pill{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav,
  .site-header__aside{display:none;flex:1 1 100%}

  .site-header[data-open] .site-nav,
  .site-header[data-open] .site-header__aside,
  .site-nav[data-open]{
    display:flex;
    flex-direction:column;
    align-items:stretch;
  }
  .site-header[data-open] .site-nav,
  .site-nav[data-open]{
    gap:0;
    margin:0;
    padding-top:8px;
    border-top:1px solid rgba(46,86,117,.55);
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__link{display:block;padding:11px 6px;border-radius:var(--radius-sm)}
  .site-nav__link[aria-current="page"]{background:rgba(50,225,208,.14);color:var(--cyan)}

  .site-header__aside{gap:10px;padding:12px 0 6px}
  .site-header__aside .btn{width:100%}

  .site-footer__top{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:700px){
  .grid--split,
  .grid--halves,
  .grid--thirds{grid-template-columns:minmax(0,1fr)}
  .site-footer__legal{flex-direction:column;align-items:flex-start;gap:10px}
  .media-frame{border-radius:var(--radius-md)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
}