@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;
  --mint-deep:#8ff3d2;
  --blue:#add8e6;
  --ink:#172620;
  --paper:#f3fdf9;
  --glass:rgba(255,255,255,.74);
  --edge:rgba(23,38,32,.16);
  --soft:inset -3px -3px 8px rgba(23,38,32,.10), inset 3px 3px 9px rgba(255,255,255,.9), 5px 8px 18px rgba(23,38,32,.14);
  --press:inset 3px 3px 7px rgba(23,38,32,.18), inset -2px -2px 7px rgba(255,255,255,.9);
  --font:'Noto Naskh Arabic','Noto Sans Arabic',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --ease:cubic-bezier(.34,1.56,.64,1);
}

*,*::before,*::after{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:
    radial-gradient(900px 560px at 6% -6%, var(--mint), transparent 64%),
    radial-gradient(760px 480px at 102% 2%, var(--blue), transparent 60%),
    var(--paper);
  overflow-x:hidden;
}

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

:focus-visible{outline:3px solid #0b6b4d;outline-offset:3px}

/* ---------- 顶部细条 ---------- */
.topline{
  background:var(--ink);
  color:var(--mint);
  font-size:15px;
  line-height:1.6;
  letter-spacing:.2em;
  text-align:center;
  padding:7px 14px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* ---------- 品牌行 ---------- */
.masthead{
  position:sticky;
  top:0;
  z-index:40;
  padding:10px 16px;
  background:rgba(243,253,249,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:3px solid rgba(23,38,32,.10);
}

.brandrow{
  max-width:1180px;
  margin:0 auto;
  display:flex;
  align-items:center;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-height:50px;
  padding:4px 20px 4px 6px;
  border:3px solid var(--ink);
  border-radius:999px;
  background:linear-gradient(150deg,#ffffff,var(--mint));
  box-shadow:var(--soft);
  text-decoration:none;
  color:var(--ink);
  font-size:19px;
  font-weight:700;
  line-height:1.3;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}

.brand:hover{transform:translateY(-2px)}
.brand:active{transform:translateY(2px);box-shadow:var(--press)}

.brand-logo{
  width:38px;
  height:38px;
  flex:0 0 auto;
  border-radius:50%;
  object-fit:cover;
}

.brand-dot{
  display:grid;
  place-items:center;
  background:var(--blue);
  border:2px solid var(--ink);
  font-size:15px;
  letter-spacing:0;
  overflow:hidden;
}

.brand-name{max-width:64vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  min-height:100svh;
  display:flex;
  align-items:flex-end;
  justify-content:flex-end;
  padding:clamp(90px,14vh,150px) clamp(16px,6vw,72px) clamp(52px,10vw,96px);
  overflow:hidden;
  border-radius:0 0 64px 64px;
  background:linear-gradient(160deg,var(--mint),var(--blue) 68%,#eafaf1);
}

.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center 28%;
  transform:scale(1.06);
  transform-origin:center;
  will-change:transform;
}

.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(200deg,rgba(23,38,32,.04),rgba(23,38,32,.58));
}

.hero-text{
  position:relative;
  z-index:2;
  width:100%;
  max-width:740px;
  text-align:right;
  padding:clamp(18px,4vw,34px);
  border:3px solid rgba(23,38,32,.55);
  border-radius:26px;
  background:rgba(255,255,255,.8);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:var(--soft);
  animation:bubble .7s var(--ease) both;
}

h1{
  margin:0;
  font-size:clamp(1.75rem,5.4vw,3.15rem);
  line-height:1.3;
  letter-spacing:.01em;
}

.hero-lead{
  margin:12px 0 0;
  font-size:16px;
  line-height:1.75;
  color:#2b4438;
}

@keyframes bubble{
  from{opacity:0;transform:translateY(18px) scale(.97)}
  to{opacity:1;transform:none}
}

/* ---------- 主体骨架 ---------- */
.wrap{
  max-width:1180px;
  margin:0 auto;
  padding:clamp(26px,5vw,54px) 16px clamp(40px,7vw,78px);
  display:grid;
  grid-template-columns:minmax(0,236px) minmax(0,1fr);
  gap:clamp(18px,3vw,36px);
  align-items:start;
}

/* ---------- 左侧栏 ---------- */
.rail{
  position:sticky;
  top:88px;
  align-self:start;
  padding:16px 14px 18px;
  border:3px solid var(--edge);
  border-radius:24px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:var(--soft);
}

.rail-title{
  margin:0;
  font-size:16px;
  line-height:1.5;
  letter-spacing:.08em;
}

hr{
  border:0;
  height:6px;
  width:74px;
  margin:10px 0 16px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--mint),var(--blue));
}

.rail-nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
  counter-reset:navc;
}

.rail-nav li{
  animation:pop .5s var(--ease) both;
  animation-delay:calc(var(--i,0) * 55ms);
}

@keyframes pop{
  from{opacity:0;transform:translateY(10px) scale(.95)}
  to{opacity:1;transform:none}
}

.rail-nav a{
  counter-increment:navc;
  display:flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:9px 15px;
  border:3px solid var(--edge);
  border-radius:999px;
  background:linear-gradient(150deg,#ffffff,#f0fdf7);
  box-shadow:var(--soft);
  color:var(--ink);
  font-size:16px;
  line-height:1.4;
  text-decoration:none;
  transition:transform .2s var(--ease),background .2s ease,box-shadow .2s ease;
}

.rail-nav a::before{
  content:counter(navc,decimal-leading-zero);
  font-size:12px;
  letter-spacing:.05em;
  color:#5c7a6c;
  font-variant-numeric:tabular-nums;
}

.rail-nav a:hover,
.rail-nav a.on{
  background:linear-gradient(150deg,var(--mint-deep),#eefff8);
  transform:translateY(-2px);
}

.rail-nav a:active{transform:translateY(1px);box-shadow:var(--press)}

/* ---------- 正文 ---------- */
.stage{min-width:0}

.prose{
  padding:clamp(16px,3.2vw,38px);
  border:3px solid var(--edge);
  border-radius:22px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--soft);
}

.prose div{
  scroll-margin-top:112px;
  border-radius:10px;
}

.prose > div + div{
  margin-top:32px;
  padding-top:32px;
  border-top:3px dashed rgba(23,38,32,.13);
}

.prose h2{
  margin:0;
  font-size:clamp(1.3rem,3vw,1.8rem);
  line-height:1.42;
}

.prose h3{
  margin:26px 0 10px;
  font-size:1.14rem;
  line-height:1.5;
}

.prose p{margin:0 0 16px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:1.35em}
.prose li{margin:6px 0}
.prose li::marker{color:#0b6b4d}

.prose a{
  color:#0b6b4d;
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}

.prose strong{color:#0d3527}

.prose img{
  margin:16px 0;
  border:3px solid rgba(23,38,32,.16);
  border-radius:14px;
  box-shadow:var(--soft);
}

.prose blockquote{
  margin:20px 0;
  padding:14px 18px;
  border-left:6px solid var(--mint);
  border-radius:0 16px 16px 0;
  background:rgba(180,253,225,.32);
}

.prose blockquote p:last-child{margin-bottom:0}

.prose table{
  width:100%;
  border-collapse:collapse;
  font-size:16px;
  margin:0 0 18px;
}

.prose th,.prose td{
  padding:10px 8px;
  text-align:left;
  border-bottom:2px solid var(--edge);
  vertical-align:top;
}

.prose code{
  padding:2px 6px;
  border-radius:8px;
  background:rgba(23,38,32,.08);
  font-size:.95em;
}

.prose hr+*{margin-top:0}

/* ---------- 页脚 ---------- */
.foot{
  margin-top:36px;
  padding:clamp(28px,5vw,54px) max(16px,calc((100% - 1180px) / 2)) 0;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(18px,3vw,32px);
  border-top:4px solid var(--ink);
  border-radius:48px 48px 0 0;
  background:linear-gradient(170deg,#eafaf1,#d9f3fb 58%,#c8eef9);
}

.foot div{min-width:0}

.foot h2{
  margin:0;
  font-size:16px;
  line-height:1.5;
  letter-spacing:.08em;
}

.foot hr{margin:8px 0 12px}

.foot ul{list-style:none;margin:0;padding:0}

.foot a{
  display:inline-block;
  padding:9px 0;
  min-height:40px;
  font-size:16px;
  line-height:1.5;
  color:var(--ink);
  text-decoration:none;
}

.foot a:hover{text-decoration:underline;text-underline-offset:3px}

.foot-brand h2{
  font-size:clamp(1.7rem,4.6vw,2.9rem);
  line-height:1.16;
  letter-spacing:0;
  word-break:break-word;
}

.foot-logo .brand-logo{
  width:54px;
  height:54px;
  border-radius:50%;
}

.foot-logo .brand-dot{font-size:18px}

.to-top{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:10px 20px;
  border:3px solid var(--ink);
  border-radius:999px;
  background:linear-gradient(150deg,var(--mint),#ffffff);
  box-shadow:var(--soft);
  font-weight:600;
  text-decoration:none;
  transition:transform .2s var(--ease);
}

.to-top:hover{transform:translateY(-2px)}
.to-top:active{transform:translateY(1px);box-shadow:var(--press)}

.foot-copy{
  grid-column:1 / -1;
  margin-top:14px;
  padding:16px 0 26px;
  border-top:3px dashed rgba(23,38,32,.18);
  text-align:center;
  font-size:15px;
}

/* ---------- 中屏 ---------- */
@media (max-width:900px){
  .wrap{
    grid-template-columns:minmax(0,1fr);
    padding-top:20px;
  }

  .rail{
    position:sticky;
    top:76px;
    z-index:20;
    padding:10px 12px 12px;
    border-radius:20px;
  }

  .rail-title{font-size:15px}
  .rail hr{height:4px;width:44px;margin:6px 0 8px}

  .rail-nav ul{
    display:flex;
    gap:8px;
    overflow-x:auto;
    padding-bottom:4px;
    scrollbar-width:none;
  }

  .rail-nav ul::-webkit-scrollbar{display:none}
  .rail-nav a{padding:8px 14px;white-space:nowrap}

  .hero{
    align-items:center;
    justify-content:flex-end;
    border-radius:0 0 40px 40px;
    padding:clamp(74px,16vh,120px) 14px clamp(40px,12vw,64px);
  }

  .hero-text{max-width:100%}
  .hero-lead{font-size:16px}

  .foot{grid-template-columns:repeat(2,minmax(0,1fr));border-radius:34px 34px 0 0}
  .prose div{scroll-margin-top:150px}
}

@media (max-width:420px){
  .brand{font-size:17px;gap:9px;padding-right:14px}
  .brand-name{max-width:56vw}
  .prose{padding:15px}
}

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

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