@import url('https://fonts.googleapis.com/css2?family=Noto+Naskh+Arabic:wght@400;500;600;700&family=Noto+Sans+Arabic:wght@300;400;500;700&display=swap');

:root{
  --red:#ff0000;
  --violet:#8b00ff;
  --ink:#261717;
  --paper:#f7ece7;
  --muted:#d4bdbc;
  --glass:rgba(255,255,255,.07);
  --glass-2:rgba(255,255,255,.12);
  --line:rgba(255,255,255,.16);
  --line-2:rgba(255,255,255,.3);
  --blur:blur(16px);
  --shadow:0 30px 70px -34px rgba(0,0,0,.9);
  --edge:1px solid var(--line);
}

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

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

body{
  margin:0;
  min-height:100vh;
  overflow-x:clip;
  font-family:'Noto Sans Arabic','Noto Naskh Arabic',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:1.0625rem;
  line-height:1.78;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(62vw 46vw at 10% -8%, rgba(255,0,0,.3), transparent 66%),
    radial-gradient(56vw 52vw at 94% 2%, rgba(139,0,255,.32), transparent 68%),
    radial-gradient(78vw 62vw at 50% 112%, rgba(139,0,255,.18), transparent 72%),
    repeating-linear-gradient(45deg, rgba(255,255,255,.035) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(-45deg, rgba(255,255,255,.028) 0 1px, transparent 1px 24px);
  background-attachment:fixed;
  background-repeat:no-repeat,no-repeat,no-repeat,repeat,repeat;
}

body::before{
  content:'';
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:linear-gradient(180deg, rgba(38,23,23,.15), rgba(38,23,23,.78) 78%);
}

a{color:#ffb0b0;text-underline-offset:3px}
a:hover{color:#fff}
:focus-visible{outline:2px solid var(--violet);outline-offset:3px}

/* ---------- 顶部玻璃条 ---------- */
.topbar{
  position:sticky;
  top:0;
  z-index:60;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:.4rem;
  padding:.5rem clamp(.7rem,3vw,1.6rem);
  padding-right:clamp(3.6rem,8vw,4.6rem);
  background:rgba(38,23,23,.5);
  backdrop-filter:var(--blur) saturate(150%);
  -webkit-backdrop-filter:var(--blur) saturate(150%);
  border-bottom:var(--edge);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08), 0 20px 46px -34px #000;
}

.topbar .split{min-width:0}
.split-left{grid-column:1}
.split-right{grid-column:3}
.split ul{
  display:flex;
  flex-wrap:nowrap;
  gap:.1rem;
  margin:0;
  padding:0;
  list-style:none;
}
.split-left ul{justify-content:flex-end}
.split-right ul{justify-content:flex-start}

.split a{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.5rem .58rem;
  font-size:.94rem;
  letter-spacing:.03em;
  color:var(--paper);
  text-decoration:none;
  white-space:nowrap;
}
.split a::after{
  content:'';
  position:absolute;
  left:.58rem;
  right:.58rem;
  bottom:.5rem;
  height:1px;
  background:linear-gradient(90deg,var(--red),var(--violet));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s ease;
}
.split a:hover::after,
.split a:focus-visible::after{transform:scaleX(1)}

.brand{
  grid-column:2;
  justify-self:center;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.4rem .9rem;
  font-size:1.12rem;
  font-weight:700;
  letter-spacing:.16em;
  color:#fff;
  text-decoration:none;
  text-shadow:0 0 26px rgba(255,0,0,.65);
  white-space:nowrap;
}
.brand:hover{color:#fff}

.burger{
  position:absolute;
  right:clamp(.7rem,3vw,1.4rem);
  top:50%;
  transform:translateY(-50%);
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  width:44px;
  height:44px;
  padding:0;
  cursor:pointer;
  color:var(--paper);
  background:var(--glass);
  border:var(--edge);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:background .25s ease,border-color .25s ease;
}
.burger i{display:block;width:18px;height:2px;background:currentColor}
.burger:hover{background:var(--glass-2);border-color:var(--line-2)}

/* ---------- 全屏遮罩菜单 ---------- */
.sheet{
  position:fixed;
  inset:0;
  z-index:80;
  display:grid;
  align-content:center;
  justify-items:center;
  gap:1rem;
  padding:5rem 1.2rem 3rem;
  overflow:auto;
  opacity:0;
  visibility:hidden;
  background:rgba(22,13,13,.74);
  backdrop-filter:blur(24px) saturate(150%);
  -webkit-backdrop-filter:blur(24px) saturate(150%);
  transition:opacity .35s ease, visibility .35s ease;
}
.sheet.is-open{opacity:1;visibility:visible}

.sheet ul{
  counter-reset:navi;
  display:grid;
  gap:.45rem;
  width:min(560px,100%);
  margin:0;
  padding:0;
  list-style:none;
}
.sheet li{counter-increment:navi}

.sheet a{
  display:flex;
  align-items:center;
  gap:.95rem;
  min-height:58px;
  padding:.85rem 1.1rem;
  font-size:1.08rem;
  letter-spacing:.07em;
  color:#fff;
  text-decoration:none;
  background:var(--glass);
  border:var(--edge);
  border-bottom:2px solid rgba(255,0,0,.6);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:transform .28s ease, background .28s ease, border-color .28s ease;
}
.sheet a::before{
  content:counter(navi,decimal-leading-zero);
  font-size:.82rem;
  letter-spacing:.14em;
  color:#ff9d9d;
}
.sheet a:hover,
.sheet a:focus-visible{
  transform:translateX(6px);
  background:var(--glass-2);
  border-color:var(--line-2);
}

.sheet-close{
  position:absolute;
  top:1rem;
  right:clamp(.8rem,4vw,1.6rem);
  min-height:44px;
  padding:.55rem 1.1rem;
  font:inherit;
  font-size:.92rem;
  letter-spacing:.2em;
  color:#fff;
  cursor:pointer;
  background:rgba(255,0,0,.45);
  border:1px solid rgba(255,255,255,.34);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

/* ---------- 主体 ---------- */
main{
  position:relative;
  z-index:1;
  max-width:1180px;
  margin-inline:auto;
  padding-inline:clamp(1rem,4vw,2.6rem);
}

main section{scroll-margin-top:96px}

/* 首屏 */
.hero{
  display:grid;
  grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
  gap:clamp(1.2rem,4vw,3rem);
  align-items:center;
  min-height:70vh;
  padding:clamp(2rem,7vw,4.6rem) 0 clamp(1.4rem,4vw,2.6rem);
}

.kicker{
  display:block;
  margin:0 0 .55rem;
  font-size:.76rem;
  letter-spacing:.34em;
  color:#ffb4b4;
}

.hero h1{
  margin:0 0 .85rem;
  font-size:clamp(2.05rem,6vw,3.55rem);
  line-height:1.16;
  letter-spacing:.02em;
  font-weight:700;
  color:#fff;
  text-shadow:0 0 46px rgba(255,0,0,.42);
}

.hero .lead{
  max-width:44ch;
  margin:0;
  font-size:1.02rem;
  color:var(--muted);
}

.hero-art{
  position:relative;
  margin:0;
  aspect-ratio:4/3;
  display:grid;
  place-items:center;
  overflow:hidden;
  border:1px solid var(--line-2);
  background:linear-gradient(148deg, rgba(255,0,0,.24), rgba(139,0,255,.26));
  box-shadow:var(--shadow), inset 0 0 0 1px rgba(255,255,255,.05);
  backdrop-filter:var(--blur);
  -webkit-backdrop-filter:var(--blur);
}
.hero-art::before{
  content:'';
  position:absolute;
  inset:0;
  background:repeating-conic-gradient(from 0deg at 50% 50%, rgba(255,255,255,.1) 0deg 1.6deg, transparent 1.6deg 30deg);
  opacity:.5;
  pointer-events:none;
}
.hero-art img,
.hero-art .hero-img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.glow{
  position:absolute;
  z-index:1;
  width:70%;
  aspect-ratio:1;
  border-radius:50%;
  background:radial-gradient(circle, rgba(255,255,255,.34), transparent 68%);
  top:-18%;
  right:-14%;
  filter:blur(6px);
  pointer-events:none;
}
.badge{
  position:absolute;
  z-index:2;
  left:.85rem;
  bottom:1rem;
  padding:.35rem .85rem;
  font-size:.78rem;
  letter-spacing:.22em;
  color:#fff;
  background:rgba(255,0,0,.55);
  border:1px solid rgba(255,255,255,.36);
  backdrop-filter:blur(9px);
  -webkit-backdrop-filter:blur(9px);
  box-shadow:0 14px 34px -14px rgba(255,0,0,.95);
}

/* 正文区块（来自 page.content，片段自带 id） */
main > section[id]{
  position:relative;
  margin-block:0 clamp(1.1rem,3vw,1.8rem);
  padding:clamp(1.25rem,3.4vw,2.4rem);
  background:var(--glass);
  border:var(--edge);
  box-shadow:var(--shadow);
  backdrop-filter:var(--blur) saturate(140%);
  -webkit-backdrop-filter:var(--blur) saturate(140%);
}
main > section[id]::after{
  content:'';
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:linear-gradient(90deg,var(--red),var(--violet) 58%,transparent);
}

main > section[id] small{
  display:block;
  margin:0 0 .35rem;
  font-size:.76rem;
  letter-spacing:.3em;
  color:#ffa0a0;
}

main h2{
  margin:0 0 .8rem;
  font-size:clamp(1.32rem,3.4vw,1.9rem);
  line-height:1.32;
  letter-spacing:.02em;
  color:#fff;
}
main h3{
  margin:1.4rem 0 .5rem;
  font-size:1.16rem;
  line-height:1.45;
  color:#fff;
}
main h4{margin:1.1rem 0 .4rem;font-size:1.02rem;color:#ffd9d9}
main p{margin:.7rem 0;color:#f0e0dc}
main ul,main ol{padding-left:1.3rem;margin:.7rem 0}
main li{margin:.35rem 0}
main img{max-width:100%;height:auto;display:block;margin:.9rem 0}
main figure{margin:1rem 0}
main blockquote{
  margin:1rem 0;
  padding:.75rem 1rem;
  border-left:2px solid var(--violet);
  background:rgba(139,0,255,.12);
  color:#f2e2ef;
}
main table{
  width:100%;
  margin:1rem 0;
  border-collapse:collapse;
  font-size:.96rem;
  display:block;
  overflow-x:auto;
}
main th,main td{
  padding:.5rem .6rem;
  border-bottom:1px solid var(--line);
  text-align:left;
}
main code{
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:.9em;
  padding:.1em .35em;
  background:rgba(255,255,255,.1);
  border:1px solid var(--line);
}
main hr{border:0;border-top:1px solid var(--line);margin:1.4rem 0}

/* 结尾 */
.outro{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.58fr);
  gap:clamp(.9rem,3vw,1.6rem);
  margin:clamp(1.4rem,4vw,2.4rem) 0 0;
}
.outro-note{
  padding:clamp(1.2rem,3vw,2rem);
  background:var(--glass-2);
  border:var(--edge);
  border-bottom:2px solid var(--violet);
  backdrop-filter:var(--blur);
  -webkit-backdrop-filter:var(--blur);
}
.outro-note h2{margin:0;font-size:clamp(1.4rem,4vw,2.1rem);color:#fff;letter-spacing:.04em}
.outro-art{
  margin:0;
  min-height:150px;
  display:grid;
  place-items:center;
  border:var(--edge);
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,.07) 0 1px, transparent 1px 16px),
    radial-gradient(circle at 70% 20%, rgba(255,0,0,.3), transparent 62%),
    rgba(139,0,255,.14);
}
.mark{
  font-size:2.6rem;
  color:rgba(255,255,255,.7);
  letter-spacing:.1em;
}

.cta{display:flex;justify-content:center;padding:clamp(1.3rem,4vw,2.2rem) 0 .4rem}
.cta-btn{
  display:inline-flex;
  align-items:center;
  min-height:52px;
  padding:.85rem 2.2rem;
  font-size:.95rem;
  letter-spacing:.22em;
  color:#fff;
  text-decoration:none;
  background:linear-gradient(100deg, rgba(255,0,0,.8), rgba(139,0,255,.8));
  border:1px solid rgba(255,255,255,.34);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:0 24px 54px -24px #ff0000;
  transition:transform .28s ease, box-shadow .28s ease;
}
.cta-btn:hover,
.cta-btn:focus-visible{transform:translateY(-3px);box-shadow:0 30px 62px -22px var(--violet)}

/* 页脚 */
.base{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:.35rem 1.2rem;
  margin-top:clamp(1.6rem,5vw,2.6rem);
  padding:1.5rem clamp(1rem,4vw,2.6rem) 2.4rem;
  border-top:var(--edge);
  font-size:.86rem;
  color:var(--muted);
  background:rgba(38,23,23,.35);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.base p{margin:0}
.base small{font-size:.78rem;letter-spacing:.24em;color:#a8918f}

/* 动效 */
@keyframes rise{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:none}
}
.sheet.is-open li{animation:rise .45s cubic-bezier(.2,.7,.3,1) both}
.sheet.is-open li:nth-child(1){animation-delay:.04s}
.sheet.is-open li:nth-child(2){animation-delay:.09s}
.sheet.is-open li:nth-child(3){animation-delay:.14s}
.sheet.is-open li:nth-child(4){animation-delay:.19s}
.sheet.is-open li:nth-child(5){animation-delay:.24s}
.sheet.is-open li:nth-child(6){animation-delay:.29s}
.sheet.is-open li:nth-child(7){animation-delay:.34s}

.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s ease var(--d,0ms), transform .6s cubic-bezier(.2,.7,.3,1) var(--d,0ms);
}
.reveal.in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (max-width:960px){
  .split{display:none}
  .hero{
    grid-template-columns:minmax(0,1fr);
    min-height:0;
    padding-top:clamp(1.6rem,6vw,2.6rem);
  }
  .hero-art{aspect-ratio:16/9;order:-1}
  .outro{grid-template-columns:minmax(0,1fr)}
  .outro-art{min-height:120px;order:-1}
}

@media (max-width:600px){
  body{font-size:1.02rem}
  .brand{font-size:1.02rem;letter-spacing:.1em}
  main > section[id]{padding:1.15rem 1rem}
  .base{justify-content:flex-start}
}

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

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