/* ============ 1. RESET ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video,picture{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}

/* ============ 2. TOKENS ============ */
:root{
  --void:#070B1A;
  --panel:#0D1328;
  --neon:#22F5E6;
  --deep:#0B8F8A;
  --mist:#EAF6FF;
  --steel:#A9B8D8;
  --violet:#8A5CFF;
  --magma:#FF6A3D;
  --glitch:#5B6B8C;

  --line:rgba(34,245,230,.16);
  --line-soft:rgba(169,184,216,.15);

  --rail-w:88px;
  --topbar-h:62px;
  --maxw:1240px;

  --r-xs:10px;
  --r-sm:16px;
  --r-md:22px;
  --r-lg:32px;
  --r-pill:999px;

  --f-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-cond:"Arial Narrow","Helvetica Neue",Helvetica,var(--f-sans);
  --f-serif:Georgia,"Songti SC","Source Han Serif SC","Noto Serif SC",serif;
  --f-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

/* ============ 3. BASE / 中文排版 ============ */
body{
  font-family:var(--f-sans);
  font-size:clamp(15px,0.55vw + 13.4px,17px);
  line-height:1.85;
  letter-spacing:.012em;
  color:var(--mist);
  background-color:var(--void);
  background-image:
    radial-gradient(1100px 620px at 10% -8%,rgba(34,245,230,.10),transparent 62%),
    radial-gradient(900px 540px at 98% 2%,rgba(138,92,255,.15),transparent 60%),
    radial-gradient(720px 480px at 62% 104%,rgba(255,106,61,.06),transparent 66%);
  background-repeat:no-repeat;
  min-height:100vh;
  padding-top:var(--topbar-h);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.nav-open{overflow:hidden}
#main-content{display:block;scroll-margin-top:calc(var(--topbar-h) + 20px)}
::selection{background:rgba(34,245,230,.28);color:#FFFFFF}

:where(a,button,summary,input,select,textarea):focus-visible{
  outline:2px solid var(--neon);
  outline-offset:3px;
  border-radius:8px;
}

/* ============ 4. 布局容器 ============ */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,48px);
}
.section{padding-block:clamp(40px,6vw,88px)}
.section--tight{padding-block:clamp(24px,3.6vw,50px)}
.stack{display:flex;flex-direction:column;gap:clamp(14px,2vw,24px)}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:10px}

/* ============ 5. 文案组件 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f-mono);
  font-size:11px;letter-spacing:.26em;text-transform:uppercase;
  color:var(--neon);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor}
.display-title{
  font-family:var(--f-cond);
  font-weight:700;
  font-size:clamp(30px,5.6vw,62px);
  line-height:1.06;
  letter-spacing:.05em;
  color:var(--mist);
  text-wrap:balance;
}
.serif-title{
  font-family:var(--f-serif);
  font-weight:400;
  font-size:clamp(22px,3.2vw,36px);
  line-height:1.32;
  letter-spacing:.01em;
  color:var(--mist);
  text-wrap:balance;
}
.lede{
  font-size:clamp(15px,1.25vw,18px);
  line-height:1.9;
  color:var(--steel);
  max-width:62ch;
}
.meta-text{
  font-family:var(--f-mono);
  font-size:11.5px;letter-spacing:.1em;
  color:var(--glitch);
}
.accent-cyan{color:var(--neon)}
.accent-violet{color:var(--violet)}
.accent-magma{color:var(--magma)}

/* ============ 6. 按钮 / 胶囊 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  padding:.82em 1.55em;
  border:1px solid transparent;border-radius:var(--r-pill);
  font-size:.92rem;font-weight:600;letter-spacing:.06em;line-height:1.2;
  transition:transform .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.btn--sm{padding:.6em 1.1em;font-size:.82rem}
.btn--primary{background:var(--neon);color:#04121A;box-shadow:0 14px 34px -18px rgba(34,245,230,.95)}
.btn--primary:hover{background:#6DFBF2;transform:translateY(-2px)}
.btn--ghost{border-color:rgba(34,245,230,.45);color:var(--neon);background:rgba(34,245,230,.06)}
.btn--ghost:hover{background:rgba(34,245,230,.16);transform:translateY(-2px)}
.btn--violet{background:var(--violet);color:#0A0518}
.btn--violet:hover{background:#A183FF;transform:translateY(-2px)}
.btn--signal{background:var(--magma);color:#180703}
.btn--signal:hover{background:#FF8A63;transform:translateY(-2px)}

.pill{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.42em 1em;border-radius:var(--r-pill);
  border:1px solid rgba(169,184,216,.26);
  background:rgba(13,19,40,.8);
  font-size:.8rem;letter-spacing:.06em;color:var(--steel);
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.pill:hover{border-color:rgba(34,245,230,.5);color:var(--mist)}
.pill--active{border-color:var(--neon);color:var(--neon);background:rgba(34,245,230,.12)}
.chip{
  display:inline-flex;align-items:center;gap:.35em;
  padding:.28em .72em;border-radius:var(--r-pill);
  border:1px solid rgba(138,92,255,.4);
  background:rgba(138,92,255,.16);
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.1em;
  color:#C9B8FF;
}
.tag{
  display:inline-flex;align-items:center;
  padding:.28em .7em;border-radius:8px;
  border:1px solid rgba(34,245,230,.35);
  background:rgba(34,245,230,.1);
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.1em;
  color:var(--neon);
}

/* ============ 7. 面包屑 ============ */
.breadcrumb{padding-block:14px}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;
  color:var(--glitch);
}
.breadcrumb__link{color:var(--steel);transition:color .2s ease}
.breadcrumb__link:hover{color:var(--neon)}
.breadcrumb__sep{color:rgba(91,107,140,.75)}
.breadcrumb__item[aria-current="page"]{color:var(--neon)}

/* ============ 8. 卡片 / 面板 ============ */
.card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  background:linear-gradient(165deg,rgba(20,29,58,.92),rgba(11,16,34,.96));
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0 0 auto;height:1px;
  background:linear-gradient(90deg,rgba(34,245,230,.6),transparent 62%);
}
.card--accent{border-color:rgba(34,245,230,.4);box-shadow:0 24px 60px -40px rgba(34,245,230,.85)}
.card__title{
  font-family:var(--f-cond);font-weight:700;
  font-size:1.1rem;letter-spacing:.08em;
  color:var(--mist);margin-bottom:.45em;
}
.card__body{font-size:.9rem;line-height:1.85;color:var(--steel)}
.panel{
  padding:clamp(16px,2vw,24px);
  border:1px solid var(--line-soft);
  border-radius:var(--r-md);
  background:rgba(13,19,40,.65);
}

/* ============ 9. 响应式图片容器 ============ */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid rgba(34,245,230,.18);
  background:linear-gradient(155deg,#0D1328,#070B1A);
  isolation:isolate;
}
.media-frame > img,
.media-frame > picture,
.media-frame > video,
.media-frame > svg{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(180deg,transparent 46%,rgba(7,11,26,.55)),
    linear-gradient(115deg,rgba(138,92,255,.16),transparent 55%);
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--portrait{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--hero{aspect-ratio:21/9;border-radius:clamp(20px,3vw,36px)}
.media-frame--empty{
  display:grid;place-items:center;
  background-image:
    repeating-linear-gradient(115deg,rgba(34,245,230,.07) 0 2px,transparent 2px 14px),
    linear-gradient(155deg,#0D1328,#070B1A);
}
.media-frame--empty::before{
  content:"IMAGE SLOT";
  font-family:var(--f-mono);font-size:11px;letter-spacing:.3em;
  color:rgba(169,184,216,.5);z-index:1;
}
.media-frame__caption{
  margin-top:10px;
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.1em;
  color:var(--glitch);
}

/* ============ 10. 显现动画 ============ */
:root.has-js [data-reveal]{
  opacity:0;
  transform:translate3d(0,20px,0);
  transition:opacity .62s ease,transform .62s cubic-bezier(.22,.72,.3,1);
  transition-delay:var(--reveal-delay,0ms);
  will-change:opacity,transform;
}
:root.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ============ 11. 滚动进度 ============ */
.scroll-progress{
  position:fixed;left:0;right:0;top:calc(var(--topbar-h) - 2px);
  height:2px;z-index:95;pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--neon),var(--violet) 62%,var(--magma));
  box-shadow:0 0 12px rgba(34,245,230,.55);
}

/* ============ 12. SKIP LINK ============ */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 20px;border-radius:var(--r-pill);
  background:var(--neon);color:#04121A;
  font-size:.85rem;font-weight:700;letter-spacing:.08em;
  transform:translateY(-180%);
  transition:transform .22s ease;
}
.skip-link:focus,.skip-link:focus-visible{transform:none;outline-offset:3px}

/* ============ 13. HEADER ============ */
.site-header{position:fixed;inset:0;z-index:90;pointer-events:none}
.site-header::after{
  content:"";position:fixed;top:0;right:0;width:1px;height:100vh;
  background:linear-gradient(180deg,rgba(34,245,230,.32),rgba(138,92,255,.2),transparent);
  display:none;
}

/* 顶部框架条 */
.frame-top{
  position:fixed;top:0;left:0;right:0;
  height:var(--topbar-h);
  display:flex;align-items:center;gap:clamp(10px,2vw,22px);
  padding-inline:clamp(14px,3.4vw,26px);
  background:rgba(7,11,26,.84);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  pointer-events:auto;
  overflow:hidden;
}
.frame-top::after{
  content:"";position:absolute;bottom:-1px;left:0;height:1px;width:34%;
  background:linear-gradient(90deg,transparent,rgba(34,245,230,.85),transparent);
  animation:frame-sweep 7.5s linear infinite;
}
@keyframes frame-sweep{
  0%{transform:translateX(-45%)}
  100%{transform:translateX(330%)}
}
.frame-brand{display:flex;align-items:baseline;gap:10px;flex-shrink:0}
.frame-brand__mark{
  font-family:var(--f-cond);font-weight:700;
  font-size:15px;letter-spacing:.34em;text-transform:uppercase;
  color:var(--neon);
  transition:color .2s ease,text-shadow .2s ease;
}
.frame-brand:hover .frame-brand__mark{color:#7CFBF1;text-shadow:0 0 16px rgba(34,245,230,.7)}
.frame-brand__line{
  font-size:11.5px;letter-spacing:.2em;
  color:var(--steel);
}
.frame-utils{
  margin-left:auto;
  display:flex;align-items:center;gap:clamp(6px,1.2vw,16px);
}
.util-link{
  padding:7px 12px;border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:12px;letter-spacing:.14em;color:var(--steel);
  white-space:nowrap;
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.util-link:hover{color:var(--mist);border-color:rgba(34,245,230,.35);background:rgba(34,245,230,.07)}
.util-link--signal{color:var(--magma);border-color:rgba(255,106,61,.35)}
.util-link--signal:hover{color:#FFD9CC;border-color:rgba(255,106,61,.7);background:rgba(255,106,61,.12)}
.ver-chip{
  padding:5px 10px;border-radius:var(--r-pill);
  border:1px solid rgba(138,92,255,.42);
  background:rgba(138,92,255,.12);
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.12em;
  color:#C9B8FF;white-space:nowrap;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  margin-left:auto;
  padding:8px 14px 8px 11px;
  border:1px solid rgba(34,245,230,.42);
  border-radius:var(--r-pill);
  background:rgba(34,245,230,.08);
  color:var(--neon);
  font-size:12px;letter-spacing:.16em;
  pointer-events:auto;
  transition:background-color .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:rgba(34,245,230,.16)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:10px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:100%;height:1.5px;border-radius:2px;
  background:currentColor;
  transition:transform .28s ease;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle__text{line-height:1}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(4.25px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-4.25px) rotate(-45deg)}
.site-header[data-open] .nav-toggle{background:rgba(138,92,255,.2);border-color:rgba(138,92,255,.55);color:#C9B8FF}

/* 品牌轨道 */
.brand-rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);
  display:flex;flex-direction:column;align-items:center;gap:22px;
  padding:18px 0 22px;
  background:linear-gradient(180deg,#0A1124 0%,#070B1A 55%,#080D1E 100%);
  border-right:1px solid var(--line);
  overflow-y:auto;
  pointer-events:auto;
}
.rail-brand{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center}
.rail-brand__glyph{
  display:grid;place-items:center;
  width:44px;height:44px;border-radius:14px;
  font-family:var(--f-cond);font-weight:700;font-size:15px;letter-spacing:.06em;
  color:#04121A;
  background:linear-gradient(150deg,var(--neon),var(--deep));
  box-shadow:0 0 24px -6px rgba(34,245,230,.8);
  transition:box-shadow .25s ease,transform .25s ease;
}
.rail-brand:hover .rail-brand__glyph{transform:translateY(-2px);box-shadow:0 0 30px -4px rgba(34,245,230,.95)}
.rail-brand__name{
  writing-mode:vertical-rl;
  font-size:11px;letter-spacing:.32em;line-height:1;
  color:var(--steel);
}
.rail-nav{width:100%;display:flex;flex-direction:column}
.rail-nav__list{display:flex;flex-direction:column;gap:2px;width:100%}
.rail-nav__item{width:100%}
.rail-nav__link{
  position:relative;display:block;width:100%;
  padding:10px 4px;
  text-align:center;
  font-size:12.5px;letter-spacing:.06em;
  color:var(--steel);
  border-radius:var(--r-pill);
  transition:color .2s ease,background-color .2s ease,text-shadow .2s ease;
}
.rail-nav__link::before{
  content:"";position:absolute;left:0;top:50%;
  width:3px;height:18px;border-radius:0 3px 3px 0;
  background:var(--neon);
  box-shadow:0 0 12px rgba(34,245,230,.9);
  transform:translateY(-50%) scaleY(0);
  transition:transform .22s ease;
}
.rail-nav__link:hover{color:var(--mist);background:rgba(34,245,230,.08)}
.rail-nav__link[aria-current="page"]{
  color:var(--neon);
  background:rgba(34,245,230,.1);
  text-shadow:0 0 18px rgba(34,245,230,.5);
}
.rail-nav__link[aria-current="page"]::before{transform:translateY(-50%) scaleY(1)}
.rail-tick{
  margin-top:auto;
  display:flex;flex-direction:column;align-items:center;gap:9px;
  writing-mode:vertical-rl;
  font-family:var(--f-mono);font-size:9.5px;letter-spacing:.14em;line-height:1;
  color:var(--glitch);
}
.rail-tick__dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--magma);
  box-shadow:0 0 10px var(--magma);
  animation:pulse-dot 2.6s ease-in-out infinite;
}
@keyframes pulse-dot{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.4;transform:scale(.72)}
}

/* ============ 14. FOOTER ============ */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(40px,6vw,80px) 0 28px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(13,19,40,.55),rgba(7,11,26,.96) 62%);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;
  width:min(46%,420px);height:1px;
  background:linear-gradient(90deg,var(--neon),rgba(138,92,255,.5),transparent);
}
.site-footer::after{
  content:"";position:absolute;right:-10%;bottom:-42%;
  width:min(64vw,660px);aspect-ratio:1;
  background:radial-gradient(circle,rgba(138,92,255,.18),transparent 66%);
  pointer-events:none;
}
.footer-frame{
  position:relative;z-index:1;
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(28px,4vw,56px);
}
.footer-brand__mark{
  font-family:var(--f-serif);
  font-size:clamp(24px,3vw,34px);
  line-height:1.22;letter-spacing:.01em;
  color:var(--mist);
}
.footer-brand__mark span{color:var(--violet);padding-inline:.2em}
.footer-brand__block{
  margin-top:12px;
  font-size:.95rem;line-height:1.8;
  color:var(--steel);
  max-width:34ch;
}
.footer-brand__note{
  margin-top:8px;
  font-size:.82rem;line-height:1.8;
  color:var(--glitch);
  max-width:36ch;
}
.footer-brand .btn{margin-top:20px}
.footer-cols__title,
.footer-meta__title{
  display:flex;align-items:center;gap:10px;
  margin-bottom:16px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--neon);
}
.footer-cols__title::before,
.footer-meta__title::before{content:"";width:14px;height:1px;background:var(--neon)}
.footer-cols__list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:2px 18px;
}
.footer-cols__link{
  display:inline-block;
  padding:6px 0;
  font-size:.9rem;letter-spacing:.02em;
  color:var(--steel);
  transition:color .2s ease,transform .2s ease;
}
.footer-cols__link:hover{color:var(--neon);transform:translateX(3px)}
.footer-meta__list{display:flex;flex-direction:column;gap:10px}
.footer-meta__row{
  display:flex;flex-direction:column;gap:2px;
  padding-bottom:9px;
  border-bottom:1px dashed rgba(169,184,216,.16);
}
.footer-meta__label{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.16em;
  color:var(--glitch);
}
.footer-meta__value{
  font-size:.88rem;line-height:1.7;
  color:var(--mist);
  word-break:break-word;
}
.footer-base{
  position:relative;z-index:1;
  margin-top:clamp(28px,4vw,48px);
  padding-top:18px;
  border-top:1px solid rgba(169,184,216,.14);
  display:flex;flex-wrap:wrap;gap:10px 24px;
  justify-content:space-between;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;
  color:var(--glitch);
}
.footer-base__legal{color:var(--steel)}

/* ============ 15. 平板 / 桌面 ============ */
@media (min-width:700px){
  .footer-frame{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .frame-brand__line{display:none}
  .util-link{display:none}
  .brand-rail{
    position:fixed;top:var(--topbar-h);left:0;right:0;bottom:auto;
    width:auto;
    max-height:calc(100dvh - var(--topbar-h));
    padding:20px clamp(16px,5vw,32px) 28px;
    gap:16px;
    align-items:stretch;
    border-right:0;
    border-bottom:1px solid var(--line);
    background:rgba(9,14,32,.97);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    transform:translateY(-14px);
    opacity:0;visibility:hidden;
    transition:transform .3s cubic-bezier(.2,.8,.3,1),opacity .25s ease,visibility .3s;
  }
  .site-header[data-open] .brand-rail{transform:none;opacity:1;visibility:visible}
  .rail-brand{flex-direction:row;justify-content:flex-start;gap:12px;text-align:left}
  .rail-brand__name{writing-mode:horizontal-tb;font-size:12px;letter-spacing:.18em}
  .rail-nav__list{gap:6px}
  .rail-nav__link{
    text-align:left;
    padding:13px 16px;
    font-size:15px;letter-spacing:.08em;
    border:1px solid rgba(169,184,216,.14);
    border-radius:14px;
  }
  .rail-nav__link::before{display:none}
  .rail-nav__link[aria-current="page"]{border-color:rgba(34,245,230,.5)}
  .rail-tick{
    writing-mode:horizontal-tb;
    flex-direction:row;justify-content:center;gap:10px;
    margin-top:6px;
  }
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .frame-top{left:var(--rail-w)}
  .site-header::after{display:block}
  .scroll-progress{left:var(--rail-w)}
  .footer-frame{grid-template-columns:minmax(0,1.45fr) minmax(0,1fr) minmax(0,1.1fr)}
  .footer-brand{grid-column:auto}
}

/* ============ 16. 减弱动效 ============ */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto}
  :root.has-js [data-reveal]{opacity:1;transform:none}
  .frame-top::after{display:none}
}