*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,figure{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
em{font-style:normal}

:root{
  --night:#071A2F;
  --night-deep:#04101E;
  --green:#123A35;
  --indigo:#241B4A;
  --wine:#5A1F2E;
  --cyan:#22E0D6;
  --orange:#FF6B2C;
  --paper:#F2F5F7;
  --mist:#9DB0BC;
  --metal:#B8FFF9;
  --ink:#0B1219;
  --line:rgba(184,255,249,.14);
  --line-soft:rgba(184,255,249,.08);
  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","DIN Condensed","Roboto Mono",Consolas,"Courier New",monospace;
  --wrap:1320px;
  --pad:28px;
  --radius-lg:22px;
  --radius-pill:999px;
}

body{
  background:var(--night);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.16;letter-spacing:.01em}
h1{font-size:clamp(38px,6vw,96px)}
h2{font-size:clamp(26px,3.6vw,54px)}
h3{font-size:clamp(20px,2.2vw,28px)}
p{line-height:1.78}

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

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;top:0;left:16px;z-index:200;
  transform:translateY(-140%);
  padding:10px 18px;
  background:var(--metal);color:var(--ink);
  font-size:14px;font-weight:600;text-decoration:none;
  border-radius:0 0 12px 12px;
  transition:transform .2s ease;
}
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--night-deep);
  color:var(--paper);
  border-bottom:1px solid var(--line);
}

.header__progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(184,255,249,.1);z-index:3}
.header__progressFill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear;
}

.header__top{background:var(--night-deep);border-bottom:1px solid var(--line-soft);overflow:hidden;max-height:80px;transition:max-height .3s ease,opacity .25s ease}
.header__topInner{
  max-width:var(--wrap);margin:0 auto;padding:8px var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;letter-spacing:.06em;color:var(--mist);
}
.header__sign{display:flex;align-items:center;gap:10px;margin:0;line-height:1.4}
.header__signMark{width:8px;height:8px;flex:0 0 auto;background:var(--orange);transform:rotate(45deg);border-radius:2px}
.header__brandName{color:var(--paper);font-weight:600;letter-spacing:.16em;font-size:12.5px}
.header__tagline{color:var(--mist)}
.header__tagline::before{content:"／";margin-right:8px;color:rgba(157,176,188,.45)}
.header__topRight{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.header__status{display:inline-flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--metal)}
.header__statusDot{width:6px;height:6px;border-radius:50%;background:var(--cyan);animation:statusPulse 2.4s ease-out infinite}
@keyframes statusPulse{
  0%{box-shadow:0 0 0 0 rgba(34,224,214,.55)}
  70%{box-shadow:0 0 0 7px rgba(34,224,214,0)}
  100%{box-shadow:0 0 0 0 rgba(34,224,214,0)}
}
.header__mail{color:var(--mist);text-decoration:none;border-bottom:1px solid rgba(157,176,188,.35);padding-bottom:1px;transition:color .2s ease,border-color .2s ease}
.header__mail:hover{color:var(--metal);border-bottom-color:var(--cyan)}

.header__main{
  position:relative;overflow:hidden;
  background:
    radial-gradient(120% 190% at 6% 0%,rgba(34,224,214,.15),transparent 56%),
    radial-gradient(90% 170% at 90% 8%,rgba(255,107,44,.14),transparent 62%),
    linear-gradient(180deg,var(--night-deep),var(--night));
}
.header__main::after{
  content:"";position:absolute;right:-70px;top:-50px;width:300px;height:200px;
  background:linear-gradient(135deg,rgba(34,224,214,.18),transparent 72%);
  transform:skewX(-18deg);pointer-events:none;
}
.header__mainInner{
  max-width:var(--wrap);margin:0 auto;padding:14px var(--pad) 0;
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"logo round actions";
  align-items:center;gap:22px 28px;position:relative;z-index:2;
}
.header__logo{grid-area:logo;display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--paper)}
.header__logoMark{
  width:46px;height:46px;flex:0 0 auto;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:19px;font-weight:700;letter-spacing:-.02em;
  color:var(--ink);
  background:linear-gradient(135deg,var(--cyan),#6FF3EA 58%,var(--metal));
  border-radius:16px 4px 16px 4px;
  box-shadow:0 0 0 1px rgba(184,255,249,.5),0 8px 20px rgba(34,224,214,.24);
  transform:rotate(-3deg);
  transition:width .25s ease,height .25s ease,font-size .25s ease;
}
.header__logoText{display:flex;flex-direction:column;line-height:1.15;font-family:var(--font-display);font-weight:900;font-size:19px;letter-spacing:.06em}
.header__logoSub{font-family:var(--font-mono);font-size:10px;font-weight:400;letter-spacing:.3em;color:var(--mist);margin-top:4px}

.header__round{grid-area:round;display:flex;flex-direction:column;gap:5px;min-width:0;max-width:520px}
.round-bar__kicker{font-family:var(--font-mono);font-size:10px;letter-spacing:.28em;color:var(--mist);text-transform:uppercase}
.round-bar__value{font-family:var(--font-mono);font-size:15px;font-weight:700;letter-spacing:.04em;color:var(--metal)}
.round-bar__num{color:var(--cyan);font-size:19px;padding:0 2px}
.round-bar{display:flex;gap:6px;margin-top:4px}
.round-bar__step{flex:1 1 0;min-width:0;display:flex;flex-direction:column;gap:5px;font-size:10.5px;letter-spacing:.1em;color:var(--mist)}
.round-bar__tick{display:block;height:3px;border-radius:var(--radius-pill);background:rgba(157,176,188,.22)}
.round-bar__step.is-done .round-bar__tick{background:rgba(34,224,214,.45)}
.round-bar__step.is-current .round-bar__tick{background:linear-gradient(90deg,var(--cyan),var(--orange));box-shadow:0 0 10px rgba(34,224,214,.45)}
.round-bar__step.is-current .round-bar__label{color:var(--metal);font-weight:600}
.round-bar__label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.header__actions{grid-area:actions;display:flex;align-items:center;gap:10px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-sans);font-size:14px;font-weight:600;letter-spacing:.04em;
  text-decoration:none;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn--accent{background:var(--orange);color:var(--ink);box-shadow:0 8px 22px rgba(255,107,44,.24)}
.btn--accent:hover{background:#FF8248;transform:translateY(-1px)}
.btn--ghost{background:rgba(36,27,74,.55);color:var(--paper);border-color:rgba(184,255,249,.28)}
.btn--ghost:hover{color:var(--metal);border-color:var(--cyan);background:rgba(34,224,214,.1)}
.btn--sm{padding:8px 15px;font-size:13px}

.header__fav{white-space:nowrap}
.header__favIcon{font-size:12px;line-height:1;color:var(--ink)}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 15px;border-radius:var(--radius-pill);
  background:rgba(36,27,74,.7);color:var(--paper);
  border:1px solid rgba(184,255,249,.26);
  font-size:13px;cursor:pointer;
  transition:border-color .2s ease,background-color .2s ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--metal)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bar{display:block;height:2px;width:100%;background:currentColor;border-radius:2px;transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5px) 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(-5px) rotate(-45deg)}
.nav-toggle__label{letter-spacing:.08em}

.site-nav{max-width:var(--wrap);margin:0 auto;padding:0 var(--pad);position:relative;z-index:2}
.nav__list{display:flex;flex-wrap:wrap;gap:2px;margin-top:12px;border-top:1px solid var(--line-soft)}
.nav__link{
  display:inline-flex;align-items:baseline;gap:8px;
  padding:13px 14px 11px;
  color:var(--paper);text-decoration:none;font-size:14px;
  border-bottom:2px solid transparent;
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.nav__num{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.08em;color:var(--mist)}
.nav__link:hover{color:var(--metal);background:rgba(34,224,214,.07);border-bottom-color:rgba(34,224,214,.5)}
.nav__link[aria-current="page"]{color:var(--cyan);border-bottom-color:var(--orange)}
.nav__link[aria-current="page"] .nav__num{color:var(--orange)}

.site-header.is-compact .header__top{max-height:0;opacity:0}
.site-header.is-compact .header__mainInner{padding-top:8px}
.site-header.is-compact .header__logoMark{width:36px;height:36px;font-size:15px;border-radius:12px 3px 12px 3px}
.site-header.is-compact .header__logoText{font-size:16px}
.site-header.is-compact .header__logoSub{display:none}
.site-header.is-compact .nav__link{padding-top:9px;padding-bottom:9px}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:0;
  background:linear-gradient(180deg,var(--night-deep),var(--night) 52%,var(--night-deep));
  border-top:1px solid var(--line);
  color:var(--paper);
}
.footer__glow{
  position:absolute;top:-140px;right:-90px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,44,.3),transparent 68%);
  filter:blur(14px);pointer-events:none;
}
.footer__inner{max-width:var(--wrap);margin:0 auto;padding:64px var(--pad) 0;position:relative;z-index:1}
.footer__grid{display:grid;grid-template-columns:1fr;gap:46px}
.footer__brand{max-width:62ch}
.footer__brandTitle{font-family:var(--font-display);font-weight:900;font-size:clamp(30px,4.2vw,50px);line-height:1.1;letter-spacing:.02em}
.footer__brandText{margin-top:16px;color:var(--mist);font-size:14.5px;line-height:1.8}
.footer__badge{
  display:inline-flex;align-items:center;gap:8px;margin-top:20px;
  padding:7px 15px;border-radius:var(--radius-pill);
  background:rgba(34,224,214,.1);border:1px solid rgba(34,224,214,.4);
  color:var(--metal);font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
}
.footer__cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));gap:28px 24px}
.footer__col{min-width:0}
.footer__colTitle{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.22em;color:var(--cyan);margin-bottom:14px}
.footer__links{display:flex;flex-direction:column;gap:10px}
.footer__link{
  display:inline-block;color:var(--paper);opacity:.82;text-decoration:none;
  font-size:14px;line-height:1.55;
  border-bottom:1px solid transparent;
  transition:color .2s ease,opacity .2s ease,border-color .2s ease;
}
.footer__link:hover{opacity:1;color:var(--metal);border-bottom-color:rgba(34,224,214,.6)}

.footer__contact{
  margin-top:46px;padding:26px 28px;border-radius:var(--radius-lg);
  background:linear-gradient(120deg,rgba(36,27,74,.88),rgba(18,58,53,.72));
  border:1px solid var(--line);
  display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:24px;align-items:start;
}
.footer__contactItem{display:flex;flex-direction:column;gap:6px;min-width:0}
.footer__contactLabel{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;color:var(--mist)}
.footer__contactValue{font-size:14.5px;color:var(--paper);word-break:break-word;line-height:1.65}
.footer__contactAction{display:flex;align-items:flex-end}

.footer__legal{
  max-width:var(--wrap);margin:38px auto 0;padding:20px var(--pad) 34px;
  border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:14px 26px;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--mist);
}
.footer__copy{margin:0;line-height:1.6}
.footer__legalLinks{display:flex;flex-wrap:wrap;gap:18px}
.footer__legalLink{color:var(--mist);text-decoration:none;border-bottom:1px solid rgba(157,176,188,.3);transition:color .2s ease,border-color .2s ease}
.footer__legalLink:hover{color:var(--metal);border-bottom-color:var(--cyan)}
.footer__icp{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:rgba(157,176,188,.9)}

.to-top{
  position:fixed;right:22px;bottom:22px;z-index:90;
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 16px;border-radius:var(--radius-pill);
  background:rgba(7,26,47,.94);color:var(--metal);
  border:1px solid rgba(34,224,214,.45);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.08em;
  cursor:pointer;opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .25s ease,transform .25s ease,border-color .2s ease;
}
.to-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.to-top:hover{border-color:var(--cyan);background:rgba(34,224,214,.14);color:var(--metal)}
.to-top__arrow{font-size:14px;line-height:1}

/* ---------- 通用组件 ---------- */
.container{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--pad)}
.section{padding:64px 0}
.lead{font-size:18px;line-height:1.78;color:#D6E2E9;max-width:62ch}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:26px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist)}
.breadcrumb__link{color:var(--mist);text-decoration:none;border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease}
.breadcrumb__link:hover{color:var(--cyan);border-bottom-color:rgba(34,224,214,.6)}
.breadcrumb__sep{color:rgba(157,176,188,.5)}
.breadcrumb__current{color:var(--metal)}

.section-marker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.26em;
  color:var(--cyan);text-transform:uppercase;
}
.section-marker::before{content:"";width:26px;height:1px;background:var(--cyan);flex:0 0 auto}
.section-marker__num{color:var(--orange)}

.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--metal);background:rgba(34,224,214,.08);
  border:1px solid rgba(184,255,249,.22);
}
.chip--orange{color:#FFC9AE;background:rgba(255,107,44,.12);border-color:rgba(255,107,44,.42)}
.chip--wine{color:#F0C6CE;background:rgba(90,31,46,.55);border-color:rgba(255,107,44,.2)}

.data-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1}

.media-frame{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--radius-lg);
  aspect-ratio:16/10;
  background:linear-gradient(140deg,#0B2338,var(--green));
  border:1px solid var(--line);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame__caption{
  position:absolute;left:14px;right:14px;bottom:14px;
  padding:7px 14px;border-radius:var(--radius-pill);
  background:rgba(4,16,30,.74);
  color:var(--metal);font-size:12px;line-height:1.5;
  border:1px solid rgba(184,255,249,.18);
}

.card{
  padding:24px;border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(18,58,53,.55),rgba(7,26,47,.22));
  border:1px solid var(--line-soft);
}
.card__tag{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--cyan)}
.card__title{font-family:var(--font-display);font-size:22px;line-height:1.32;margin:10px 0 8px;font-weight:900}
.card__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist)}

[data-fav].is-active{background:var(--orange);color:var(--ink);border-color:var(--orange);animation:favPop .32s ease}
@keyframes favPop{0%{transform:scale(1)}45%{transform:scale(1.1)}100%{transform:scale(1)}}

.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;
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .footer__inner{padding-top:56px}
  .footer__contact{padding:22px 24px}
}

@media (max-width:899px){
  .header__topInner{padding:7px 18px;font-size:11.5px;gap:10px}
  .header__topRight{gap:12px}
  .header__status{font-size:11px}
  .header__mainInner{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:"logo toggle" "round actions";
    gap:10px 12px;
    padding:12px 18px 12px;
  }
  .header__logoMark{width:38px;height:38px;font-size:16px;border-radius:13px 3px 13px 3px}
  .header__logoText{font-size:17px}
  .header__logoSub{font-size:9px;letter-spacing:.26em}
  .header__round{max-width:none;gap:3px}
  .round-bar__kicker{display:none}
  .round-bar__value{font-size:13px}
  .round-bar__num{font-size:16px}
  .round-bar{gap:4px;margin-top:2px}
  .header__actions{grid-area:actions;justify-content:flex-end}
  .nav-toggle{display:inline-flex;grid-area:toggle}

  .site-nav{display:none;padding:0 18px 14px}
  .site-header[data-open="true"] .site-nav{display:block}
  .nav__list{flex-direction:column;gap:2px;margin-top:0;padding-top:10px;border-top:1px solid var(--line)}
  .nav__link{
    width:100%;padding:11px 12px;border-radius:12px;
    border-bottom:0;border-left:2px solid transparent;
    font-size:14.5px;
  }
  .nav__link[aria-current="page"]{background:rgba(34,224,214,.09);border-left-color:var(--orange);border-bottom-color:transparent}
  .site-header[data-open="true"] .header__progress{bottom:-1px}

  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .section{padding:48px 0}
  .lead{font-size:16.5px}
  .footer__cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__legal{flex-direction:column;align-items:flex-start}
}

@media (max-width:640px){
  :root{--pad:18px}
  .header__tagline{display:none}
  .header__brandName{letter-spacing:.12em}
  .header__mail{font-size:11.5px}
  .header__fav{padding:8px 12px;font-size:12px}
  .header__favIcon{font-size:11px}
  .nav-toggle{padding:8px 13px;font-size:12.5px}
  .round-bar__label{font-size:9.5px;letter-spacing:.02em}
  .footer__inner{padding:48px 18px 0}
  .footer__grid{gap:34px}
  .footer__contact{margin-top:34px;padding:20px 18px;grid-template-columns:1fr;gap:18px}
  .footer__contactAction{align-items:flex-start}
  .footer__legal{padding:18px 18px 28px}
  .grid--12{grid-template-columns:1fr}
  .to-top{right:14px;bottom:14px;padding:10px 14px;font-size:12px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .header__statusDot{animation:none;box-shadow:0 0 0 3px rgba(34,224,214,.22)}
  .header__logoMark{transform:none}
  [data-fav].is-active{animation:none}
  .skip-link{transition:none}
}