@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{
  --mint:#b4fde1;
  --sky:#add8e6;
  --ink:#172620;
  --ink-soft:rgba(23,38,32,.70);
  --clay-out:6px 6px 0 rgba(23,38,32,.16);
  --clay-in:inset -3px -4px 10px rgba(23,38,32,.13), inset 4px 5px 12px rgba(255,255,255,.9);
  --pill-out:3px 3px 0 rgba(23,38,32,.20);
  --pill-in:inset -2px -3px 7px rgba(23,38,32,.10), inset 3px 3px 8px rgba(255,255,255,.9);
  --edge:3px solid var(--ink);
  --head-font:'Noto Naskh Arabic',Georgia,'Songti SC','SimSun',serif;
  --body-font:'Noto Sans Arabic',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

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

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

body{
  margin:0;
  font-family:var(--body-font);
  font-size:17px;
  line-height:1.72;
  color:var(--ink);
  overflow-x:hidden;
  background:
    radial-gradient(circle at 14% 6%,#ddfff2 0,rgba(221,255,242,0) 40%),
    radial-gradient(circle at 86% 2%,#dceff8 0,rgba(220,239,248,0) 36%),
    linear-gradient(180deg,#f3fffb 0,#ecf7fd 58%,#f6fffc 100%);
  background-attachment:fixed;
}

img{max-width:100%}

a{color:var(--ink)}

:focus-visible{outline:3px solid #0c5e46;outline-offset:3px}

/* ---------- 顶部 ---------- */

.top{
  position:relative;
  z-index:20;
  padding:0 0 12px;
  border-bottom:4px solid var(--ink);
  background:linear-gradient(180deg,#ebfff7,#f5fffb 70%,#f0fbff);
  box-shadow:0 8px 0 rgba(23,38,32,.07);
}

.ticker{
  margin:0;
  padding:7px 14px;
  background:var(--ink);
  color:var(--mint);
  font-size:13px;
  letter-spacing:.24em;
  text-align:center;
  font-weight:500;
}

.brandbar{
  display:flex;
  justify-content:center;
  padding:12px 14px 8px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  min-height:48px;
  padding:2px 6px;
  text-decoration:none;
  color:var(--ink);
}

.brand-mark{
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  flex:0 0 46px;
  border:3px solid var(--ink);
  border-radius:999px;
  background:linear-gradient(150deg,#dcfff2,var(--mint) 45%,#8fe9ff);
  font-family:var(--head-font);
  font-size:22px;
  font-weight:700;
  box-shadow:var(--pill-out),var(--pill-in);
  animation:pop .55s cubic-bezier(.34,1.56,.64,1) both;
}

.brand-text{
  font-family:var(--head-font);
  font-size:22px;
  font-weight:700;
  letter-spacing:.10em;
}

@keyframes pop{
  0%{transform:scale(.72) rotate(-8deg)}
  100%{transform:scale(1) rotate(0)}
}

.pills{padding:0 12px}

.pills ul{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}

.pills a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:8px 15px;
  border:var(--edge);
  border-radius:999px;
  background:#fff;
  color:var(--ink);
  font-size:15.5px;
  font-weight:600;
  text-decoration:none;
  box-shadow:var(--pill-out),var(--pill-in);
  transition:transform .2s cubic-bezier(.34,1.56,.64,1),box-shadow .2s ease-out,background .2s ease-out;
}

.pills li:nth-child(3n) a{background:#e9f7ff}
.pills li:nth-child(3n+1) a{background:#f0fff9}

.pills a:hover{
  background:linear-gradient(160deg,#e5fff5,var(--mint));
  transform:translateY(-3px);
  box-shadow:6px 7px 0 rgba(23,38,32,.18),var(--pill-in);
}

.pills a:active{transform:translateY(1px) scale(.98)}

/* ---------- 布局骨架 ---------- */

.stage{
  display:flex;
  align-items:flex-start;
  gap:22px;
  max-width:1180px;
  margin:0 auto;
  padding:26px 16px 0;
}

.rail{
  flex:0 0 208px;
  position:sticky;
  top:18px;
  padding:14px 12px 16px;
  border:var(--edge);
  border-radius:24px;
  background:linear-gradient(170deg,#ffffff,#f1fffa);
  box-shadow:var(--clay-out),var(--clay-in);
}

.rail-cap{
  margin:0 0 10px;
  text-align:center;
  font-size:12px;
  letter-spacing:.32em;
  color:var(--ink-soft);
}

.rail-list{
  margin:0;
  padding:0;
  list-style:none;
  counter-reset:rl;
}

.rail-list li{counter-increment:rl}

.rail-list a{
  display:flex;
  align-items:center;
  gap:8px;
  min-height:40px;
  padding:6px 8px;
  border-radius:14px;
  font-size:15px;
  text-decoration:none;
  color:var(--ink);
  transition:background .18s ease-out,transform .18s ease-out;
}

.rail-list a::before{
  content:counter(rl,decimal-leading-zero);
  flex:0 0 auto;
  padding:1px 5px;
  border:2px solid var(--ink);
  border-radius:8px;
  background:var(--mint);
  font-size:11.5px;
  font-weight:700;
  line-height:1.5;
}

.rail-list a:hover{background:#eafff6;transform:translateX(2px)}

.main{flex:1 1 auto;min-width:0}

/* ---------- 首屏 ---------- */

.hero{
  position:relative;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  padding:28px 18px 24px;
  border:4px solid var(--ink);
  border-radius:32px;
  background:linear-gradient(165deg,#e9fff7,#ddf1fb);
  box-shadow:var(--clay-out),var(--clay-in);
}

.hero::before{
  content:'';
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.11;
  background-image:radial-gradient(var(--ink) 1.3px,transparent 1.4px);
  background-size:17px 17px;
}

.hero h1{
  position:relative;
  z-index:1;
  margin:0 0 12px;
  font-family:var(--head-font);
  font-size:clamp(27px,6.4vw,44px);
  font-weight:700;
  line-height:1.28;
  letter-spacing:.02em;
  text-wrap:balance;
}

.hero h1::after{
  content:'';
  display:block;
  width:72px;
  height:7px;
  margin:14px auto 0;
  border-radius:999px;
  background:linear-gradient(90deg,var(--mint),var(--sky));
  border:2px solid var(--ink);
}

.hero-desc{
  position:relative;
  z-index:1;
  max-width:48ch;
  margin:0;
  font-size:16.5px;
  line-height:1.7;
  color:var(--ink-soft);
}

.hero-fig{
  position:relative;
  z-index:1;
  width:100%;
  max-width:560px;
  min-height:130px;
  margin:22px auto 0;
  border:4px solid var(--ink);
  border-radius:26px;
  overflow:hidden;
  background:linear-gradient(150deg,var(--mint),var(--sky));
  box-shadow:5px 6px 0 rgba(23,38,32,.20);
}

.hero-fig .hero-img{
  display:block;
  width:100%;
  height:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  will-change:transform;
}

/* ---------- 正文卡区 ---------- */

.stack{
  margin-top:24px;
}

.stack > h2{
  margin:0 0 10px;
  font-family:var(--head-font);
  font-size:clamp(21px,4.6vw,28px);
  line-height:1.35;
  letter-spacing:.03em;
}

.stack > hr{
  margin:0 0 20px;
  border:0;
  height:5px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--mint),var(--sky),#ffffff);
}

.stack > div{
  position:relative;
  margin:0 0 22px;
  padding:22px 20px 34px;
  border:var(--edge);
  border-radius:28px;
  background:linear-gradient(175deg,#ffffff,#f6fffc);
  box-shadow:var(--clay-out),var(--clay-in);
  scroll-margin-top:20px;
}

.stack > div::after{
  content:'';
  position:absolute;
  left:20px;
  right:20px;
  bottom:13px;
  height:7px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--mint),var(--sky));
}

.stack > div > *:first-child{margin-top:0}
.stack > div > *:last-child{margin-bottom:0}

.stack h2,.stack h3,.stack h4{
  font-family:var(--head-font);
  line-height:1.4;
  letter-spacing:.02em;
  margin:20px 0 10px;
}

.stack h2{font-size:22px}
.stack h3{font-size:19px}
.stack h4{font-size:17px}

.stack p{margin:0 0 13px}

.stack ul,.stack ol{margin:0 0 14px;padding-left:22px}
.stack li{margin:0 0 7px}

.stack a{
  color:#0b5a43;
  text-decoration:underline;
  text-decoration-color:var(--sky);
  text-decoration-thickness:2.5px;
  text-underline-offset:3px;
}

.stack a:hover{background:#e9fff7}

.stack strong{font-weight:700}

.stack hr{
  margin:16px 0;
  border:0;
  height:4px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--sky),var(--mint));
}

.stack figure{
  margin:16px 0;
  border:var(--edge);
  border-radius:20px;
  overflow:hidden;
  background:linear-gradient(150deg,#edfff8,#e6f4fc);
}

.stack img{display:block;width:100%;height:auto}

.stack figcaption{
  padding:8px 12px;
  font-size:14px;
  color:var(--ink-soft);
  background:rgba(255,255,255,.7);
  border-top:2px solid rgba(23,38,32,.14);
}

.stack blockquote{
  margin:0 0 14px;
  padding:12px 16px;
  border-left:7px solid var(--mint);
  border-radius:0 16px 16px 0;
  background:#f2fffa;
  color:var(--ink-soft);
}

.stack table{
  width:100%;
  border-collapse:collapse;
  font-size:16px;
}

.stack th,.stack td{
  padding:8px 10px;
  border:2px solid rgba(23,38,32,.16);
  text-align:left;
}

.stack th{background:#effff8}

/* ---------- 页脚 ---------- */

.foot{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:10px 24px;
  max-width:1180px;
  margin:42px auto 0;
  padding:26px 18px 40px;
  border-top:4px solid var(--ink);
}

.foot p{margin:0}

.foot-brand{
  grid-column:1;
  grid-row:1;
  font-family:var(--head-font);
  font-size:20px;
  font-weight:700;
  letter-spacing:.08em;
}

.foot-key{
  grid-column:1;
  grid-row:2;
  font-size:14.5px;
  color:var(--ink-soft);
}

.foot-links{
  grid-column:2;
  grid-row:1 / span 2;
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  align-content:flex-start;
  gap:8px;
}

.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:5px 13px;
  border:3px solid var(--ink);
  border-radius:999px;
  background:#fff;
  font-size:14.5px;
  text-decoration:none;
  box-shadow:var(--pill-out);
  transition:transform .18s ease-out,background .18s ease-out;
}

.foot-links a:hover{background:var(--mint);transform:translateY(-2px)}

.copy{
  grid-column:1;
  grid-row:3;
  font-size:13.5px;
  color:var(--ink-soft);
}

.totop{
  grid-column:2;
  grid-row:3;
  justify-self:end;
}

.totop a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:4px 14px;
  border:3px solid var(--ink);
  border-radius:999px;
  background:#fff;
  font-size:13.5px;
  text-decoration:none;
  box-shadow:var(--pill-out);
}

.totop a:hover{background:var(--sky)}

/* ---------- 断点 ---------- */

@media (max-width:900px){
  .stage{flex-direction:column;padding:18px 14px 0;gap:16px}
  .rail{
    position:static;
    flex:0 0 auto;
    width:100%;
    overflow-x:auto;
    padding:12px;
    border-radius:22px;
  }
  .rail-cap{margin-bottom:8px;text-align:left;letter-spacing:.2em}
  .rail-list{display:flex;gap:8px}
  .rail-list a{
    white-space:nowrap;
    padding:6px 10px;
    border:2px solid rgba(23,38,32,.35);
    border-radius:999px;
    background:#fff;
  }
  .rail-list a:hover{transform:none}
  .foot{
    grid-template-columns:minmax(0,1fr);
    padding:22px 16px 36px;
    margin-top:32px;
  }
  .foot-brand,.foot-key,.foot-links,.copy,.totop{
    grid-column:1;
    justify-self:start;
  }
  .foot-brand{grid-row:1}
  .foot-key{grid-row:2}
  .foot-links{grid-row:3;justify-content:flex-start}
  .copy{grid-row:4;margin-top:6px}
  .totop{grid-row:5;justify-self:start}
}

@media (max-width:560px){
  body{font-size:16.5px;line-height:1.68}
  .ticker{font-size:12px;letter-spacing:.16em;padding:6px 10px}
  .brandbar{padding:10px 12px 6px}
  .brand-mark{width:42px;height:42px;flex-basis:42px;font-size:20px}
  .brand-text{font-size:19px}
  .pills{padding:0 10px}
  .pills ul{gap:7px}
  .pills a{font-size:15px;padding:8px 12px;min-height:40px}
  .hero{padding:22px 14px 18px;border-radius:26px}
  .hero-fig{margin-top:18px;min-height:110px}
  .stack > div{padding:18px 15px 30px;border-radius:24px}
  .stack > hr{margin-bottom:16px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}

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