@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{
  --ink:#1f1726;
  --plum:#56228b;
  --brown:#8b4513;
  --paper:#f7f1ea;
  --card:#fffaf4;
  --line:rgba(31,23,38,.12);
  --soft:0 20px 42px -30px rgba(31,23,38,.62);
  --font:"Noto Naskh Arabic","Noto Sans Arabic","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --pad:clamp(16px,4vw,48px);
}

*{box-sizing:border-box}

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

body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 9% 3%,rgba(139,69,19,.13),transparent 40%),
    radial-gradient(circle at 93% 1%,rgba(86,34,139,.15),transparent 38%),
    radial-gradient(circle at 50% 118%,rgba(86,34,139,.1),transparent 54%);
  background-attachment:fixed;
}

img{max-width:100%;display:block}
a{color:var(--plum);text-decoration-thickness:1px;text-underline-offset:3px}

/* 顶部 */
.site-header{
  position:sticky;
  top:0;
  z-index:40;
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px var(--pad);
  background:rgba(247,241,234,.93);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  border-radius:0 0 24px 24px/0 0 26px 26px;
}

.brand{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:6px 16px;
  border-radius:22px 999px 999px 22px;
  background:linear-gradient(135deg,var(--plum),var(--brown));
  color:#fdf8f2;
  font-weight:600;
  font-size:17px;
  letter-spacing:.06em;
  text-decoration:none;
  box-shadow:0 12px 22px -18px rgba(31,23,38,.95);
}

.brand-mark{width:26px;height:26px;border-radius:50%;background:rgba(255,255,255,.35)}

.site-nav{flex:1 1 auto;min-width:0;overflow-x:auto;scrollbar-width:none}
.site-nav::-webkit-scrollbar{height:0}
.site-nav p{display:flex;flex-wrap:nowrap;justify-content:flex-start;gap:8px;margin:0}

.site-nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:9px 16px;
  border-radius:999px;
  border:1px solid rgba(86,34,139,.2);
  background:rgba(255,255,255,.62);
  color:#3d2b4e;
  font-size:16px;
  white-space:nowrap;
  text-decoration:none;
  transition:background .25s ease,color .25s ease,transform .25s ease,border-color .25s ease;
}

.site-nav a:hover{background:var(--plum);border-color:var(--plum);color:#fdf8f2;transform:translateY(-2px)}

@media(min-width:1080px){
  .site-nav{overflow:visible}
  .site-nav p{flex-wrap:wrap;justify-content:flex-end}
}

/* 首屏 */
.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  min-height:100svh;
  padding:clamp(16px,4vw,40px) var(--pad) 0;
}

.hero-copy{
  text-align:right;
  margin-left:auto;
  max-width:46rem;
  padding-top:clamp(12px,5vh,54px);
  animation:rise .7s ease both;
}

h1{
  margin:0 0 16px;
  font-size:clamp(28px,7.4vw,56px);
  line-height:1.2;
  letter-spacing:.01em;
  color:#241a2e;
}

.lede{max-width:34ch;margin:0 0 18px auto;color:#4b3a5b;font-size:17px}

.hero-cta{margin:0}

.hero-cta a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:10px 22px;
  border-radius:999px;
  background:var(--plum);
  color:#fdf8f2;
  font-weight:500;
  text-decoration:none;
  box-shadow:0 14px 26px -18px rgba(86,34,139,.95);
  transition:transform .25s ease,background .25s ease;
}

.hero-cta a:hover{transform:translateY(-2px);background:#6a2ba8}

.hero-art{
  position:relative;
  margin:auto 0 0;
  height:clamp(200px,34vh,400px);
  border-radius:46% 12% 0 0/26% 32% 0 0;
  overflow:hidden;
  background:linear-gradient(160deg,#e9dcef,#e3cdb8);
  box-shadow:0 -22px 42px -32px rgba(31,23,38,.9);
}

.hero-art img,.hero-art svg{width:100%;height:100%;object-fit:cover}

.badge{
  position:absolute;
  top:14px;
  left:5%;
  z-index:2;
  margin:0;
  padding:9px 20px;
  font-size:16px;
  font-weight:600;
  letter-spacing:.05em;
  color:#fdf8f2;
  background:linear-gradient(135deg,rgba(86,34,139,.96),rgba(139,69,19,.94));
  border-radius:24px 24px 24px 8px;
  box-shadow:0 16px 28px -18px rgba(31,23,38,.9);
  transform:rotate(-2.2deg);
  animation:fade .8s ease both;
}

/* 正文与侧栏 */
.stage{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(20px,3vw,40px);
  max-width:1240px;
  margin:0 auto;
  padding:clamp(30px,5vw,64px) var(--pad) clamp(40px,7vw,80px);
}

@media(min-width:980px){
  .stage{grid-template-columns:minmax(0,1fr) 17rem;align-items:start}
}

.prose{min-width:0}
.prose *{overflow-wrap:break-word}

.prose div{
  background:var(--card);
  border-radius:0;
  box-shadow:var(--soft);
  padding:clamp(20px,3.4vw,34px);
  margin-bottom:clamp(18px,2.6vw,26px);
  scroll-margin-top:114px;
  animation:rise .55s ease both;
}

.prose div:first-child{padding-top:clamp(20px,3.4vw,34px)}
.prose div:last-child{margin-bottom:0}

.prose h2{
  position:relative;
  margin:0 0 14px;
  padding-left:26px;
  font-size:clamp(21px,4.2vw,29px);
  line-height:1.4;
  color:#2a1c38;
  letter-spacing:.01em;
}

.prose h2 span{position:relative}

.prose h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.52em;
  width:14px;
  height:14px;
  border-radius:62% 38% 55% 45%/45% 58% 42% 55%;
  background:linear-gradient(135deg,var(--plum),var(--brown));
}

.prose h3{position:relative;margin:22px 0 10px;font-size:19px;line-height:1.5;color:#3a2a4a}
.prose h3 span{border-bottom:2px solid rgba(139,69,19,.36);padding-bottom:2px}

.prose p{margin:0 0 14px}
.prose ul,.prose ol{margin:0 0 16px;padding-left:1.3em}
.prose li{margin-bottom:8px}
.prose li::marker{color:var(--brown)}
.prose strong{color:#2a1c38}
.prose a{color:var(--plum)}

.prose blockquote{
  margin:0 0 16px;
  padding:14px 18px;
  border-left:4px solid var(--brown);
  border-radius:0 20px 20px 0;
  background:rgba(139,69,19,.07);
  color:#3f2e4f;
}

.prose table{width:100%;border-collapse:collapse;margin:0 0 16px;font-size:16px}
.prose th,.prose td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left}
.prose th{background:rgba(86,34,139,.08)}
.prose img{margin:0 0 14px;border-radius:18px}
.prose figure{margin:0 0 16px}

.rail{
  border-radius:28px 28px 28px 10px;
  padding:18px 16px;
  background:linear-gradient(180deg,rgba(86,34,139,.09),rgba(139,69,19,.09));
  box-shadow:var(--soft);
}

@media(min-width:980px){
  .rail{position:sticky;top:104px}
}

.rail-title{
  margin:0 0 10px;
  font-size:17px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--plum);
}

.rail-list{list-style:none;margin:0 0 12px;padding:0;display:flex;flex-direction:column;gap:2px}
.rail-list li{animation:rise .5s ease both;animation-delay:calc(var(--i) * 55ms)}

.rail-list a{
  display:block;
  min-height:42px;
  padding:9px 12px;
  border-radius:14px;
  border-left:2px solid transparent;
  color:#3d2b4e;
  font-size:16px;
  text-decoration:none;
  transition:background .25s ease,color .25s ease,border-color .25s ease;
}

.rail-list a:hover,.rail-list a.is-active{
  background:rgba(86,34,139,.14);
  border-left-color:var(--plum);
  color:var(--plum);
}

.rail-top{margin:0}

.rail-top a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.72);
  color:var(--brown);
  font-size:16px;
  text-decoration:none;
}

/* 页脚 */
.site-footer{
  display:grid;
  gap:8px;
  padding:clamp(28px,5vw,52px) var(--pad) 26px;
  background:#1f1726;
  color:#e8dcf0;
  border-radius:44px 44px 0 0;
}

.site-footer p{margin:0}
.foot-brand{font-size:18px;font-weight:600;letter-spacing:.1em;color:#f6eefb}
.foot-links{display:flex;flex-wrap:wrap;gap:2px}

.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:8px 10px;
  border-radius:14px;
  color:#e3d3ee;
  font-size:16px;
  text-decoration:none;
}

.foot-links a:hover{background:rgba(255,255,255,.12);color:#fff}
.foot-desc{color:#bda9cd;font-size:16px;line-height:1.75}
.foot-copy{color:#9c88ae;font-size:16px}

@media(min-width:820px){
  .site-footer{grid-template-columns:1.5fr 1fr;column-gap:36px}
  .foot-brand,.foot-desc{grid-column:1}
  .foot-links,.foot-copy{grid-column:2;text-align:right}
  .foot-links{justify-content:flex-end}
}

/* 回到顶部 */
.to-top{
  position:fixed;
  right:14px;
  bottom:14px;
  z-index:50;
  min-height:44px;
  padding:10px 18px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.35);
  background:var(--plum);
  color:#fdf8f2;
  font-family:inherit;
  font-size:16px;
  cursor:pointer;
  opacity:0;
  pointer-events:none;
  transform:translateY(8px);
  transition:opacity .3s ease,transform .3s ease;
  box-shadow:0 16px 28px -18px rgba(31,23,38,.95);
}

.to-top.on{opacity:1;pointer-events:auto;transform:none}

@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}

@media(max-width:600px){
  h1{font-size:clamp(26px,8.4vw,34px)}
  .badge{left:4%;padding:8px 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}