/* 眠丘 — 睡眠与正念 · 深墨蓝夜空 + 月白 */

:root{
  --bg:#0a1428;
  --bg2:#102040;
  --ink:#f0e6d2;
  --muted:rgba(240,230,210,.62);
  --line:rgba(240,230,210,.14);
  --accent:#e8c87a;
  --accent-soft:rgba(232,200,122,.16);
  --glass:rgba(255,255,255,.055);
  --r:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}

html,body{margin:0;padding:0}

body{
  min-height:100vh;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ---------- 背景：夜空 / 月 / 星 / 山影 ---------- */

.sky{
  position:fixed;
  inset:0;
  z-index:0;
  background:
    radial-gradient(120% 80% at 50% -10%, #1b3560 0%, var(--bg2) 38%, var(--bg) 72%),
    linear-gradient(180deg,#0a1428 0%,#08101f 100%);
}

.stars{
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
}

.star{
  position:absolute;
  width:2px;height:2px;
  border-radius:50%;
  background:var(--ink);
  opacity:.5;
  animation:twinkle 4s var(--ease) infinite;
}

@keyframes twinkle{
  0%,100%{opacity:.18;transform:scale(.7)}
  50%{opacity:.85;transform:scale(1)}
}

/* 移到右上角：居中会和登录卡片重叠，光晕压住标题导致不可读 */
.moon{
  position:fixed;
  top:5vh;
  right:7%;
  left:auto;
  width:150px;height:150px;
  z-index:1;
  border-radius:50%;
  background:radial-gradient(circle at 38% 34%, #fffaf0 0%, #f3e4c0 42%, #d9c193 70%, #b99b6d 100%);
  box-shadow:0 0 56px 16px rgba(232,200,122,.10);
  animation:breathe 9s var(--ease) infinite;
}

@keyframes breathe{
  0%,100%{box-shadow:0 0 50px 12px rgba(232,200,122,.08)}
  50%{box-shadow:0 0 78px 22px rgba(232,200,122,.15)}
}

/* 月面阴影，形成月牙感 */
.moon::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:50%;
  background:radial-gradient(circle at 66% 60%, transparent 34%, rgba(10,20,40,.34) 70%);
}

.hills{
  position:fixed;
  left:0;right:0;bottom:0;
  height:34vh;
  z-index:1;
  pointer-events:none;
}

.hills svg{
  display:block;
  width:100%;
  height:100%;
}

/* ---------- 布局 ---------- */

.wrap{
  position:relative;
  z-index:2;
  min-height:100vh;
  display:grid;
  place-items:center;
  padding:48px 20px;
}

.card{
  width:100%;
  max-width:420px;
  padding:38px 34px 30px;
  border-radius:26px;
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(22px) saturate(140%);
  -webkit-backdrop-filter:blur(22px) saturate(140%);
  box-shadow:0 24px 70px rgba(0,0,0,.45);
  animation:rise .8s var(--ease) both;
}

@keyframes rise{
  from{opacity:0;transform:translateY(22px) scale(.98)}
  to{opacity:1;transform:none}
}

/* 品牌标识 */
.mark{
  display:block;
  width:44px;height:44px;
  margin:0 auto 20px;
  border-radius:50%;
  border:1.5px solid var(--accent);
  position:relative;
}

.mark::before{
  content:"";
  position:absolute;
  inset:9px;
  border-radius:50%;
  background:var(--accent);
  opacity:.9;
}

.mark::after{
  content:"";
  position:absolute;
  inset:-6px;
  border-radius:50%;
  border:1px solid var(--accent);
  opacity:.28;
}

h1{
  margin:0 0 8px;
  font-size:27px;
  font-weight:500;
  letter-spacing:.02em;
  text-align:center;
}

.sub{
  margin:0 0 26px;
  font-size:13.5px;
  color:var(--muted);
  text-align:center;
  line-height:1.75;
}

/* ---------- 表单 ---------- */

.field{margin-bottom:16px}

.field label{
  display:block;
  margin-bottom:7px;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.06em;
}

.field input{
  width:100%;
  padding:12px 14px;
  font:inherit;
  font-size:14.5px;
  color:var(--ink);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:12px;
  outline:none;
  transition:border-color .25s var(--ease), background .25s var(--ease);
}

.field input::placeholder{color:rgba(240,230,210,.3)}

.field input:hover{border-color:rgba(240,230,210,.26)}

.field input:focus{
  border-color:var(--accent);
  background:rgba(232,200,122,.07);
}

.field input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.pw{
  position:relative;
}

.toggle{
  position:absolute;
  right:10px;top:50%;
  transform:translateY(-50%);
  width:30px;height:30px;
  display:grid;place-items:center;
  padding:0;
  color:var(--muted);
  background:none;
  border:none;
  border-radius:8px;
  cursor:pointer;
  transition:color .2s var(--ease);
}

.toggle:hover{color:var(--ink)}

.toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.toggle svg{width:17px;height:17px;display:block}

.row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin:18px 0 22px;
  font-size:13px;
}

.keep{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--muted);
  cursor:pointer;
  user-select:none;
}

.keep input{
  appearance:none;
  -webkit-appearance:none;
  width:16px;height:16px;
  margin:0;
  border:1px solid var(--line);
  border-radius:5px;
  background:rgba(255,255,255,.04);
  cursor:pointer;
  position:relative;
  transition:background .2s var(--ease), border-color .2s var(--ease);
}

.keep input:checked{
  background:var(--accent);
  border-color:var(--accent);
}

.keep input:checked::after{
  content:"";
  position:absolute;
  left:5px;top:1.5px;
  width:4px;height:8px;
  border:solid #0a1428;
  border-width:0 1.6px 1.6px 0;
  transform:rotate(42deg);
}

.keep input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

a{
  color:var(--muted);
  text-decoration:none;
  transition:color .2s var(--ease);
}

a:hover{color:var(--accent)}

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

/* 按钮 */
.btn{
  display:block;
  width:100%;
  padding:13px 18px;
  font:inherit;
  font-size:14.5px;
  font-weight:500;
  text-align:center;
  color:#0a1428;
  background:var(--accent);
  border:none;
  border-radius:999px;
  cursor:pointer;
  transition:transform .2s var(--ease), box-shadow .25s var(--ease);
}

.btn:hover{
  transform:translateY(-1px);
  box-shadow:0 10px 26px rgba(232,200,122,.24);
}

.btn:active{transform:translateY(0)}

.btn:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

.btn-ghost{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  margin-top:12px;
  color:var(--ink);
  background:transparent;
  border:1px solid var(--line);
}

.btn-ghost:hover{
  border-color:rgba(240,230,210,.34);
  box-shadow:none;
  transform:none;
}

.btn-ghost svg{width:17px;height:17px;display:block;flex:none}

.sep{
  display:flex;
  align-items:center;
  gap:12px;
  margin:20px 0 12px;
  font-size:11.5px;
  color:rgba(240,230,210,.4);
}

.sep::before,.sep::after{
  content:"";
  flex:1;
  height:1px;
  background:var(--line);
}

.foot{
  margin-top:22px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
  text-align:center;
}

.foot a{color:var(--ink);font-weight:500}

/* ---------- 内页：首页 ---------- */

.page{
  position:relative;
  z-index:2;
  max-width:960px;
  margin:0 auto;
  padding:56px 24px 90px;
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:18px 24px;
  position:relative;
  z-index:3;
}

.nav .brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:500;
  color:var(--ink);
}

.nav .brand .mark{
  width:26px;height:26px;
  margin:0;
  flex:none;
}

.nav .brand .mark::before{inset:6px}

.nav .brand .mark::after{display:none}

.nav ul{
  display:flex;
  gap:26px;
  margin:0;padding:0;
  list-style:none;
  font-size:14px;
}

.nav ul a.on{color:var(--accent)}

.nav .mini{
  padding:8px 16px;
  font-size:13px;
  color:var(--ink);
  border:1px solid var(--line);
  border-radius:999px;
  transition:border-color .2s var(--ease), background .2s var(--ease);
}

.nav .mini:hover{
  border-color:var(--accent);
  background:var(--accent-soft);
  color:var(--ink);
}

.hero h2{
  margin:34px 0 14px;
  font-size:clamp(30px,5vw,46px);
  font-weight:500;
  line-height:1.32;
  letter-spacing:.01em;
}

.hero p.lede{
  max-width:44ch;
  margin:0 0 30px;
  font-size:16px;
  color:var(--muted);
}

.eyebrow{
  display:inline-block;
  margin-bottom:14px;
  padding:5px 13px;
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--accent);
  border:1px solid var(--accent);
  border-radius:999px;
}

/* 固定两列：auto-fit 在 ~1000px 会塌成三列，第四张孤零零换行 */
.grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
  margin-top:34px;
}

.cell{
  padding:24px 22px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(255,255,255,.03);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:border-color .3s var(--ease), transform .3s var(--ease);
}

.cell:hover{
  border-color:rgba(232,200,122,.4);
  transform:translateY(-3px);
}

.cell h3{
  margin:0 0 8px;
  font-size:17px;
  font-weight:500;
}

.cell p{
  margin:0;
  font-size:13.5px;
  color:var(--muted);
  line-height:1.72;
}

.cell .num{
  display:block;
  margin-bottom:14px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent);
  opacity:.8;
}

.cta{
  display:inline-block;
  width:auto;
  margin-top:34px;
  padding:12px 26px;
}

.note{
  margin-top:40px;
  padding-top:22px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:rgba(240,230,210,.42);
}

/* 滚动淡入 */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .7s var(--ease), transform .7s var(--ease);
}

.reveal.in{opacity:1;transform:none}

@media (max-width:720px){
  .grid{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:640px){
  .nav ul{gap:16px;font-size:13px}
  .nav{padding:14px 16px;flex-wrap:wrap}
  .card{padding:30px 22px 24px}
  .page{padding:36px 18px 70px}
  .moon{width:92px;height:92px;top:3.5vh;right:5%}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
}