@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Hebrew:wght@300;400;500;700&display=swap');

:root{
  --ink:#171f26;
  --ink-up:#1e2933;
  --ink-dn:#131b22;
  --blue:#c8e0f4;
  --pink:#f5e0e8;
  --txt:#dde7ef;
  --muted:#93a6b4;
  --hi:rgba(200,224,244,.10);
  --hi-warm:rgba(245,224,232,.10);
  --lo:rgba(0,0,0,.62);
  --r:18px;
}

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

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  background:var(--ink);
}

body{
  margin:0;
  font-family:'Noto Sans Hebrew','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.75;
  color:var(--txt);
  background:
    radial-gradient(120% 70% at 8% -12%, #223039 0%, rgba(34,48,57,0) 58%),
    radial-gradient(90% 60% at 102% 2%, #2b212a 0%, rgba(43,33,42,0) 46%),
    var(--ink);
  background-attachment:fixed;
}

img{max-width:100%;height:auto}

a{color:var(--blue)}

.page{overflow-x:clip}

/* 顶部细条 */
.strip{
  background:linear-gradient(90deg,#1b242c,#26323c 55%,#2a222b);
  border-bottom:1px solid rgba(200,224,244,.07);
  padding:7px 14px;
  text-align:center;
}
.strip-word{
  font-size:13px;
  letter-spacing:.34em;
  color:var(--blue);
  opacity:.85;
}

/* 页头 */
.masthead{
  position:sticky;
  top:0;
  z-index:30;
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:14px;
  padding:12px clamp(14px,4vw,34px);
  background:rgba(23,31,38,.88);
  backdrop-filter:blur(10px);
  box-shadow:0 8px 24px rgba(0,0,0,.5);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:6px 16px;
  border-radius:14px;
  font-size:18px;
  font-weight:700;
  letter-spacing:.04em;
  color:#fff;
  text-decoration:none;
  background:linear-gradient(145deg,#202c36,#141c23);
  box-shadow:-4px -4px 11px var(--hi),4px 4px 13px var(--lo);
}
.brand:active{transform:scale(.98)}
.brand-mark{width:26px;height:26px;border-radius:9px;object-fit:cover;display:block}

.nav{margin-left:auto;min-width:0;max-width:100%}
.nav-list{
  display:flex;
  gap:4px;
  margin:0;
  padding:4px;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:thin;
}
.nav-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:0 12px;
  border-radius:12px;
  font-size:15px;
  color:var(--blue);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s ease,box-shadow .18s ease,transform .15s ease;
}
.nav-list a:hover,
.nav-list a:focus-visible{
  color:#fff;
  box-shadow:-3px -3px 8px var(--hi),3px 3px 10px var(--lo);
}
.nav-list a:active{transform:scale(.96)}

/* Hero */
.hero{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:minmax(0,1.05fr);
  align-items:center;
  gap:clamp(18px,4vw,44px);
  max-width:1160px;
  min-height:45vh;
  margin:clamp(16px,3vw,30px) auto 0;
  padding:clamp(22px,4vw,44px);
  border-radius:26px;
  background:linear-gradient(150deg,#243139,#161e25 70%);
  box-shadow:-10px -10px 28px rgba(200,224,244,.07),12px 12px 32px rgba(0,0,0,.62);
}
.hero.with-fig{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr)}

.hero-ghost{
  position:absolute;
  right:-.04em;
  bottom:-.2em;
  z-index:0;
  font-size:clamp(96px,20vw,236px);
  font-weight:700;
  line-height:.78;
  color:var(--hi-warm);
  pointer-events:none;
  will-change:transform;
}

.hero-copy{position:relative;z-index:1}

.hero h1{
  margin:0 0 14px;
  font-size:clamp(28px,5vw,50px);
  line-height:1.18;
  letter-spacing:-.012em;
  color:#fff;
}
.hero-desc{
  margin:0 0 22px;
  max-width:44ch;
  color:#b9c9d6;
  font-size:16.5px;
}

.cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 24px;
  border-radius:999px;
  font-size:15px;
  font-weight:700;
  color:#14232d;
  text-decoration:none;
  background:linear-gradient(145deg,var(--pink),#e3c6d2);
  box-shadow:-4px -4px 12px var(--hi-warm),5px 5px 15px rgba(0,0,0,.62);
  transition:transform .18s ease,box-shadow .18s ease;
}
.cta:hover{transform:translateY(-2px)}
.cta:active{transform:scale(.97);box-shadow:inset 3px 3px 8px rgba(0,0,0,.22)}

.hero-figure{position:relative;z-index:1;margin:0}
.hero-img{
  display:block;
  width:100%;
  border-radius:var(--r);
  box-shadow:-6px -6px 16px var(--hi-warm),9px 9px 22px rgba(0,0,0,.6);
}

/* 内容骨架 */
.shell{
  display:grid;
  grid-template-columns:236px minmax(0,1fr);
  align-items:start;
  gap:clamp(18px,3vw,38px);
  max-width:1160px;
  margin:clamp(22px,4vw,44px) auto 0;
  padding:0 clamp(14px,4vw,34px) clamp(30px,5vw,64px);
}

.rail{
  position:sticky;
  top:92px;
  padding:18px 15px 20px;
  border-radius:var(--r);
  background:linear-gradient(145deg,#1f2a34,#151d24);
  box-shadow:-6px -6px 16px var(--hi),8px 8px 20px var(--lo);
  max-height:calc(100vh - 120px);
  overflow:auto;
}
.rail small{
  display:block;
  margin-bottom:3px;
  font-size:11.5px;
  letter-spacing:.3em;
  color:var(--pink);
  opacity:.8;
}
.rail-head{
  margin:0 0 12px;
  font-size:18px;
  line-height:1.3;
  color:#fff;
}
.rail-list{
  counter-reset:rail;
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:2px;
}
.rail-list li{counter-increment:rail}
.rail-list a{
  display:flex;
  align-items:baseline;
  gap:9px;
  min-height:40px;
  padding:6px 9px;
  border-radius:12px;
  font-size:14.5px;
  line-height:1.4;
  color:var(--muted);
  text-decoration:none;
  transition:color .18s ease,box-shadow .18s ease;
}
.rail-list a::before{
  content:counter(rail,decimal-leading-zero);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--blue);
  opacity:.6;
}
.rail-list a:hover,
.rail-list a:focus-visible{
  color:#fff;
  box-shadow:inset -2px -2px 6px var(--hi),inset 3px 3px 9px rgba(0,0,0,.55);
}

.doc{min-width:0}

.doc div{
  position:relative;
  margin:0 0 clamp(20px,3vw,30px);
  padding:clamp(18px,3vw,36px);
  border-radius:var(--r);
  background:linear-gradient(145deg,#1f2a34,#141c23);
  box-shadow:-7px -7px 20px var(--hi),9px 9px 24px var(--lo);
  scroll-margin-top:104px;
}
.doc div:last-child{margin-bottom:0}

.doc small{
  display:block;
  margin-bottom:4px;
  font-size:12px;
  letter-spacing:.26em;
  color:var(--pink);
  opacity:.82;
}
.doc h2{
  margin:0 0 .55em;
  font-size:clamp(21px,2.4vw,28px);
  line-height:1.3;
  letter-spacing:-.005em;
  color:#fff;
}
.doc h3{
  margin:1.4em 0 .5em;
  font-size:19px;
  line-height:1.4;
  color:#fff;
}
.doc p{margin:0 0 1em}
.doc p:last-child{margin-bottom:0}
.doc strong{color:#fff}
.doc a{color:var(--blue);text-underline-offset:3px}
.doc ul,.doc ol{margin:0 0 1em;padding-left:1.35em}
.doc li{margin:.35em 0}
.doc li::marker{color:var(--pink)}
.doc blockquote{
  margin:1.1em 0;
  padding:14px 18px;
  border-radius:14px;
  color:#cfdde8;
  box-shadow:inset 3px 3px 10px rgba(0,0,0,.5),inset -3px -3px 10px var(--hi);
}
.doc blockquote p:last-child{margin-bottom:0}
.doc img{
  display:block;
  margin:1.1em 0;
  border-radius:14px;
  box-shadow:-4px -4px 12px var(--hi),5px 5px 14px var(--lo);
}
.doc table{width:100%;border-collapse:collapse;font-size:16px}
.doc th,.doc td{padding:9px 10px;text-align:left;border-bottom:1px solid rgba(200,224,244,.12)}
.doc th{color:#fff;font-weight:600}
.doc hr{border:0;height:1px;background:rgba(200,224,244,.14);margin:1.6em 0}
.doc code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:15px;
  padding:1px 6px;
  border-radius:7px;
  background:#101820;
  color:var(--pink);
}

/* 页脚 */
.foot{
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:clamp(20px,4vw,40px);
  padding:clamp(30px,5vw,60px) clamp(16px,4vw,40px) 22px;
  border-radius:30px 30px 0 0;
  border-top:1px solid rgba(200,224,244,.08);
  background:linear-gradient(180deg,#1b252e,#101821);
  box-shadow:-8px -8px 26px rgba(200,224,244,.05);
}
.foot-word{
  display:block;
  font-size:clamp(34px,8vw,82px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  color:transparent;
  background:linear-gradient(140deg,var(--blue),var(--pink));
  -webkit-background-clip:text;
  background-clip:text;
}
.foot-list{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:2px 12px;
}
.foot-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:4px 8px;
  border-radius:11px;
  font-size:14.5px;
  color:var(--muted);
  text-decoration:none;
  transition:color .18s ease,box-shadow .18s ease;
}
.foot-list a:hover,
.foot-list a:focus-visible{
  color:#fff;
  box-shadow:-3px -3px 8px var(--hi),3px 3px 10px var(--lo);
}
.foot-base{
  grid-column:1 / -1;
  padding-top:16px;
  border-top:1px solid rgba(200,224,244,.1);
  text-align:center;
}
.copy{margin:0;font-size:14px;color:#8799a6;letter-spacing:.04em}

/* 回到顶部 */
.totop{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:40;
  width:48px;
  height:48px;
  border:0;
  border-radius:50%;
  font-size:20px;
  line-height:1;
  color:#14232d;
  background:linear-gradient(145deg,var(--blue),#a6c4dc);
  box-shadow:-4px -4px 12px rgba(200,224,244,.2),5px 5px 15px rgba(0,0,0,.62);
  cursor:pointer;
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity .22s ease,transform .22s ease;
}
.totop.show{opacity:1;transform:none;pointer-events:auto}
.totop:active{transform:scale(.93)}

:focus-visible{outline:2px solid var(--pink);outline-offset:3px;border-radius:8px}

/* 断点 */
@media (max-width:960px){
  .shell{grid-template-columns:1fr}
  .rail{position:static;max-height:none}
  .rail-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero,
  .hero.with-fig{grid-template-columns:1fr}
  .hero-ghost{font-size:clamp(90px,26vw,190px);bottom:-.14em}
}

@media (max-width:760px){
  body{font-size:16.5px;background-attachment:scroll}
  .masthead{padding:10px 12px;gap:8px}
  .nav{width:100%;margin-left:0}
  .nav-list{padding:2px 0}
  .nav-list a{font-size:14.5px;padding:0 10px;min-height:44px}
  .hero{margin-top:12px;padding:20px 18px;border-radius:20px}
  .foot{grid-template-columns:1fr;border-radius:24px 24px 0 0}
  .foot-list{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

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