@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,700;1,400&display=swap');

:root{
  --void:#0a0614;
  --ink:#1a1a2e;
  --red:#ff0000;
  --mag:#ff006e;
  --cyan:#00e0ff;
  --txt:#edeaff;
  --dim:#a99ecd;
  --line:rgba(255,0,110,.34);
  --hair:rgba(255,255,255,.09);
  --r:28px;
  --maxw:1160px;
  --pad:clamp(16px,4vw,40px);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

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

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

body{
  margin:0;
  background:
    radial-gradient(900px 620px at 88% -8%,rgba(255,0,110,.16),transparent 62%),
    radial-gradient(760px 520px at 2% 102%,rgba(255,0,0,.13),transparent 60%),
    var(--void);
  color:var(--txt);
  font-family:'Plus Jakarta Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  font-size:17px;
  line-height:1.72;
  overflow-x:hidden;
}

body::before{
  content:'';
  position:fixed;
  inset:0;
  z-index:90;
  pointer-events:none;
  opacity:.6;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.05) 0 1px,transparent 1px 3px);
}

img{max-width:100%;height:auto}
dl,dd{margin:0}
ul,ol{margin:0;padding:0}
a{color:var(--txt)}

.skip{
  position:absolute;
  left:12px;
  top:-70px;
  z-index:100;
  padding:12px 18px;
  border-radius:999px;
  background:var(--mag);
  color:#15000a;
  font-weight:700;
  text-decoration:none;
  transition:top .18s ease;
}
.skip:focus{top:12px}

/* 顶部 */
.masthead{
  position:relative;
  z-index:40;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:14px var(--pad);
}

.mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:48px;
  min-height:48px;
  padding:4px;
  border:1px solid var(--line);
  border-radius:16px;
  text-decoration:none;
  overflow:hidden;
  background:rgba(255,0,110,.07);
  box-shadow:0 0 18px rgba(255,0,110,.25) inset;
}
.mark img{display:block;border-radius:12px}
.mark-txt{
  font-family:var(--mono);
  font-size:12px;
  line-height:1.2;
  letter-spacing:.16em;
  max-width:132px;
  padding:0 8px;
  text-align:center;
  color:var(--txt);
}

.menu-btn{
  appearance:none;
  min-height:48px;
  padding:0 22px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  color:var(--txt);
  font-family:inherit;
  font-size:16px;
  letter-spacing:.08em;
  cursor:pointer;
}
.menu-btn:hover,.menu-btn:focus-visible{
  background:rgba(255,0,110,.14);
  text-shadow:0 0 12px var(--mag);
}

.menu{
  position:absolute;
  top:calc(100% + 6px);
  right:var(--pad);
  display:none;
  grid-template-columns:1fr 1fr;
  gap:18px 30px;
  width:min(460px,92vw);
  padding:22px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(15,9,26,.97);
  box-shadow:0 0 0 1px rgba(255,0,110,.12),0 24px 60px rgba(0,0,0,.6);
  z-index:46;
}
.masthead.open .menu{display:grid}
.menu-col ul{list-style:none;display:grid;gap:2px;margin-top:8px}
.menu-key{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.3em;
  color:var(--mag);
}
.menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:6px 10px;
  border-radius:12px;
  font-size:16px;
  text-decoration:none;
  border:1px solid transparent;
}
.menu a:hover,.menu a:focus-visible{
  border-color:var(--line);
  background:rgba(255,0,110,.12);
  text-shadow:0 0 12px var(--mag);
}

/* 粘性锚点条 */
.beam{
  position:sticky;
  top:0;
  z-index:35;
  background:rgba(10,6,20,.92);
  border-top:1px solid var(--hair);
  border-bottom:1px solid var(--line);
}
.beam-nav ul{
  display:flex;
  gap:2px;
  overflow-x:auto;
  scrollbar-width:none;
  padding:5px var(--pad);
}
.beam-nav ul::-webkit-scrollbar{display:none}
.beam-nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 13px;
  white-space:nowrap;
  font-size:16px;
  color:var(--dim);
  text-decoration:none;
  border-bottom:2px solid transparent;
}
.beam-nav a:hover,.beam-nav a:focus-visible{
  color:#fff;
  border-bottom-color:var(--mag);
  text-shadow:0 0 12px var(--mag);
}

/* 首屏 */
.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  gap:clamp(24px,6vw,56px);
  min-height:100vh;
  min-height:100svh;
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(28px,7vw,74px) var(--pad) 0;
  overflow:hidden;
}
.hero::before{
  content:'';
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,0,110,.1) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,0,110,.1) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(circle at 32% 42%,#000 12%,transparent 74%);
  mask-image:radial-gradient(circle at 32% 42%,#000 12%,transparent 74%);
}
.hero-copy{
  position:relative;
  z-index:1;
  max-width:24ch;
}
h1{
  position:relative;
  margin:0 0 16px;
  font-size:clamp(30px,6.6vw,66px);
  line-height:1.12;
  letter-spacing:-.015em;
  text-shadow:0 0 18px rgba(255,0,110,.5),0 0 52px rgba(255,0,0,.28);
}
h1::before,h1::after{
  content:attr(data-text);
  position:absolute;
  left:0;
  top:0;
  width:100%;
  pointer-events:none;
  opacity:.75;
}
h1::before{color:var(--red);clip-path:inset(0 0 58% 0);animation:glitch-a 5.6s steps(1) infinite}
h1::after{color:var(--cyan);clip-path:inset(58% 0 0 0);animation:glitch-b 7.2s steps(1) infinite}
@keyframes glitch-a{
  0%,86%,100%{transform:translate(0,0)}
  88%{transform:translate(-3px,-2px)}
  91%{transform:translate(3px,1px)}
  94%{transform:translate(-2px,2px)}
}
@keyframes glitch-b{
  0%,88%,100%{transform:translate(0,0)}
  90%{transform:translate(3px,2px)}
  93%{transform:translate(-3px,-1px)}
  96%{transform:translate(2px,-2px)}
}
.lede{
  margin:0;
  font-size:clamp(16px,2vw,19px);
  line-height:1.66;
  color:var(--dim);
  max-width:52ch;
}

.hero-fig{
  position:relative;
  z-index:1;
  margin:0;
  will-change:transform;
}
.hero-fig .shot{
  display:block;
  width:100%;
  max-height:50vh;
  object-fit:cover;
  border:1px solid var(--line);
  border-bottom:0;
  border-radius:var(--r) var(--r) 0 0;
  box-shadow:0 0 40px rgba(255,0,110,.22);
}
.hero-fig figcaption{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.26em;
  color:var(--mag);
  padding:10px 2px 12px;
}

/* 正文区 */
main{display:block}

.stage{
  display:grid;
  grid-template-columns:minmax(0,250px) minmax(0,1fr);
  gap:clamp(20px,3.4vw,48px);
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(44px,7vw,92px) var(--pad);
}

.rail{
  position:sticky;
  top:76px;
  align-self:start;
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:22px 18px;
  background:linear-gradient(180deg,rgba(255,0,110,.08),rgba(255,255,255,.01));
  overflow:hidden;
}
.rail small{
  display:block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.3em;
  color:var(--mag);
}
.rail h2{
  margin:.24em 0 .8em;
  font-size:20px;
  line-height:1.3;
  letter-spacing:.01em;
}
.rail ul{list-style:none;display:grid;gap:1px}
.rail a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:4px 10px;
  font-size:16px;
  color:var(--dim);
  text-decoration:none;
  border-left:2px solid transparent;
}
.rail a:hover,.rail a:focus-visible{
  color:#fff;
  border-left-color:var(--mag);
  background:rgba(255,0,110,.1);
}
.rail-glow{
  position:absolute;
  right:-40px;
  bottom:-40px;
  width:120px;
  height:120px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,0,110,.5),transparent 70%);
  pointer-events:none;
}

.read{min-width:0}

.read > article{
  position:relative;
  padding:clamp(30px,4.4vw,48px) 0;
  border-top:1px solid var(--hair);
  scroll-margin-top:80px;
}
.read > article:first-child{border-top:0;padding-top:0}
.read > article:target{
  border-top-color:var(--mag);
  box-shadow:inset 0 24px 40px -34px rgba(255,0,110,.9);
}
.read > article:target::before{
  content:'';
  position:absolute;
  left:-14px;
  top:0;
  bottom:0;
  width:2px;
  background:linear-gradient(180deg,var(--mag),transparent);
}

.read small{
  display:block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.28em;
  color:var(--mag);
  margin-bottom:6px;
}
.read h2{
  margin:0 0 .5em;
  font-size:clamp(22px,3.1vw,32px);
  line-height:1.28;
  letter-spacing:-.012em;
  text-shadow:0 0 18px rgba(255,0,110,.42);
}
.read h3{
  margin:1.5em 0 .45em;
  font-size:clamp(18px,2.2vw,22px);
  line-height:1.35;
  color:#fff;
}
.read p{
  margin:0 0 1.05em;
  max-width:66ch;
}
.read ul,.read ol{
  margin:0 0 1.15em;
  padding-left:1.15em;
  max-width:66ch;
}
.read ul{list-style:none;padding-left:0}
.read ul > li{position:relative;padding-left:20px;margin-bottom:.5em}
.read ul > li::before{
  content:'';
  position:absolute;
  left:2px;
  top:.72em;
  width:7px;
  height:7px;
  transform:rotate(45deg);
  background:var(--mag);
  box-shadow:0 0 10px var(--mag);
}
.read ol > li{margin-bottom:.5em}
.read a{
  color:#ff8fb4;
  text-decoration:underline;
  text-decoration-color:rgba(255,0,110,.5);
  text-underline-offset:3px;
}
.read a:hover{color:#fff;text-shadow:0 0 10px var(--mag)}
.read strong{color:#fff}
.read img{
  border:1px solid var(--line);
  border-radius:var(--r);
  margin:.4em 0 1.1em;
}
.read figure{margin:0 0 1.2em}
.read figcaption{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--dim);
  padding-top:8px;
}
.read blockquote{
  margin:0 0 1.2em;
  padding:18px 22px;
  border:1px solid var(--line);
  border-left-width:3px;
  border-radius:0 var(--r) var(--r) 0;
  background:rgba(255,0,110,.07);
  color:var(--txt);
}
.read blockquote p:last-child{margin-bottom:0}
.read table{
  width:100%;
  border-collapse:collapse;
  margin:0 0 1.3em;
  font-size:16px;
}
.read th,.read td{
  border:1px solid var(--hair);
  padding:10px 12px;
  text-align:left;
  vertical-align:top;
}
.read th{background:rgba(255,0,110,.12);color:#fff}
.read code,.read pre{
  font-family:var(--mono);
  font-size:14px;
}
.read pre{
  overflow-x:auto;
  padding:16px;
  border:1px solid var(--line);
  border-radius:18px;
  background:rgba(0,0,0,.4);
  margin:0 0 1.2em;
}
.read hr{
  border:0;
  border-top:1px dashed var(--hair);
  margin:2em 0;
}

/* 页脚 */
.foot{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,0,110,.09),transparent 46%),var(--void);
  padding:clamp(40px,7vw,80px) var(--pad) 26px;
}
.cta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(24px,4vw,44px);
  border:1px solid var(--line);
  border-radius:var(--r);
  background:radial-gradient(620px 200px at 8% 0,rgba(255,0,0,.18),transparent 72%);
}
.cta-title{
  margin:0;
  font-size:clamp(21px,3.4vw,34px);
  font-weight:700;
  letter-spacing:-.01em;
  text-shadow:0 0 24px rgba(255,0,110,.6);
}
.cta-btn{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:0 26px;
  border-radius:999px;
  background:var(--mag);
  color:#15000a;
  font-weight:700;
  text-decoration:none;
  box-shadow:0 0 26px rgba(255,0,110,.55);
}
.cta-btn:hover{background:#ff3d8f;box-shadow:0 0 34px rgba(255,0,110,.85)}

.foot-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,40px);
  max-width:var(--maxw);
  margin:clamp(28px,5vw,52px) auto 0;
}
.foot-col dt{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.3em;
  color:var(--mag);
  padding-bottom:10px;
  border-bottom:1px solid var(--hair);
  margin-bottom:10px;
}
.foot-col dd a{
  display:flex;
  align-items:center;
  min-height:42px;
  font-size:16px;
  color:var(--dim);
  text-decoration:none;
}
.foot-col dd a:hover,.foot-col dd a:focus-visible{color:#fff;text-shadow:0 0 12px var(--mag)}

.copy{
  max-width:var(--maxw);
  margin:clamp(26px,4vw,44px) auto 0;
  padding-top:16px;
  border-top:1px solid var(--hair);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  color:#7f76a3;
}

@media (max-width:880px){
  .stage{grid-template-columns:minmax(0,1fr);padding-top:clamp(28px,6vw,44px)}
  .rail{position:static;order:0}
  .rail ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 8px}
  .rail a{min-height:40px}
  .rail-glow{display:none}
  .foot-cols{grid-template-columns:minmax(0,1fr);gap:22px}
  .cta{flex-direction:column;align-items:flex-start}
  .cta-btn{width:100%;justify-content:center}
}

@media (max-width:600px){
  body{font-size:16px}
  .menu{right:12px;left:12px;width:auto;grid-template-columns:minmax(0,1fr);gap:14px;padding:18px}
  .hero{min-height:auto;padding-top:clamp(20px,6vw,34px);padding-bottom:0}
  .hero-copy{max-width:none}
  .hero-fig .shot{max-height:34vh}
  .rail ul{grid-template-columns:minmax(0,1fr)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  h1::before,h1::after{animation:none}
  .hero-fig{transform:none!important}
}

button[aria-expanded]{min-width:44px;min-height:44px}