/* =====================================================================
   云笺 · 天蓝云端主题（Light / Glassmorphism 2.0）
   性能约定：动效只用 transform + opacity；时长 150–300ms；
   悬停抬升用 transform，阴影静态；尊重 prefers-reduced-motion。
   ===================================================================== */
:root{
  /* 天蓝主色系 */
  --sky-50:#f0f9ff; --sky-100:#e0f2fe; --sky-200:#bae6fd; --sky-300:#7dd3fc;
  --sky-400:#38bdf8; --sky-500:#0ea5e9; --sky-600:#0284c7; --sky-700:#0369a1;
  /* 文字 */
  --ink:#0f172a; --ink-2:#334155; --muted:#64748b;
  /* 玻璃与线条 */
  --glass:rgba(255,255,255,.55);
  --glass-strong:rgba(255,255,255,.72);
  --line:rgba(255,255,255,.75);
  --line-soft:rgba(15,23,42,.08);
  /* 强调与阴影 */
  --grad:linear-gradient(135deg,#38bdf8,#0ea5e9);
  --grad-deep:linear-gradient(135deg,#7dd3fc,#38bdf8 45%,#0284c7);
  --shadow:0 12px 40px -14px rgba(14,116,233,.22),0 2px 10px rgba(15,23,42,.05);
  --shadow-hover:0 22px 50px -16px rgba(14,116,233,.32),0 6px 18px rgba(15,23,42,.07);
  --ring:0 0 0 3px rgba(14,165,233,.28);
  --ease:cubic-bezier(.4,0,.2,1);
  --spring:cubic-bezier(.34,1.56,.64,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  min-height:100vh;color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,
    "PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",Helvetica,Arial,sans-serif;
  font-size:15px;line-height:1.7;letter-spacing:-.003em;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background:
    radial-gradient(1100px 560px at 88% -8%,rgba(186,230,253,.85),transparent 60%),
    radial-gradient(900px 520px at -6% 18%,rgba(224,242,254,.95),transparent 55%),
    linear-gradient(180deg,#e8f4fe 0%,#f2f9ff 42%,#fbfdff 100%);
  background-attachment:fixed;
  overscroll-behavior-y:contain;
}
::selection{background:rgba(56,189,248,.35)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:12px}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-thumb{background:linear-gradient(#bae6fd,#7dd3fc);border-radius:99px;border:2px solid #eef7fe}
::-webkit-scrollbar-thumb:hover{background:var(--sky-400)}
::-webkit-scrollbar-track{background:transparent}

.ico{width:22px;height:22px;display:block;flex-shrink:0}
.xlogo{width:26px;height:26px;color:var(--sky-600);display:block}

/* ================= 天空背景（云与光斑） ================= */
.sky{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.7}
.b1{width:520px;height:520px;top:-140px;right:-120px;background:#bae6fd;
  animation:floatA 24s var(--ease) infinite alternate}
.b2{width:460px;height:460px;bottom:-160px;left:-120px;background:#cfe9ff;
  animation:floatB 30s var(--ease) infinite alternate}
.b3{width:340px;height:340px;top:38%;left:42%;background:#dff1ff;
  animation:floatA 20s var(--ease) infinite alternate-reverse}
.cloud{position:absolute;background:#fff;border-radius:999px;opacity:.5;
  filter:blur(2px);animation:drift linear infinite}
.c1{width:340px;height:64px;top:14%;left:-360px;animation-duration:68s}
.c2{width:220px;height:46px;top:30%;left:-260px;animation-duration:96s;animation-delay:12s}
.c3{width:280px;height:56px;top:8%;left:-320px;animation-duration:120s;animation-delay:30s}
@keyframes floatA{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(-60px,50px,0) scale(1.12)}}
@keyframes floatB{from{transform:translate3d(0,0,0) scale(1.05)}to{transform:translate3d(50px,-40px,0) scale(.95)}}
@keyframes drift{from{transform:translateX(0)}to{transform:translateX(calc(100vw + 700px))}}

/* ================= 导航 ================= */
.nav{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.5);backdrop-filter:blur(18px) saturate(170%);-webkit-backdrop-filter:blur(18px) saturate(170%);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease);
}
.nav.scrolled{box-shadow:0 6px 28px -8px rgba(14,116,233,.16)}
.nav-inner{
  max-width:860px;margin:0 auto;padding:10px 20px;
  display:flex;align-items:center;gap:16px;
}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18px;letter-spacing:.01em}
.brand .mark{
  width:34px;height:34px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:var(--grad);color:#fff;box-shadow:0 6px 16px -6px rgba(14,165,233,.55);
}
.brand em{font-style:normal;background:var(--grad-deep);-webkit-background-clip:text;background-clip:text;color:transparent}
.navlinks{display:flex;gap:4px;margin-left:8px}
.navlinks a{
  padding:8px 15px;border-radius:999px;font-weight:600;font-size:14.5px;color:var(--ink-2);
  transition:color .18s,background .18s,transform .15s var(--spring);
}
.navlinks a:hover{color:var(--sky-700);background:rgba(255,255,255,.7)}
.navlinks a.active{color:#fff;background:var(--grad);box-shadow:0 6px 16px -6px rgba(14,165,233,.5)}
.navlinks a:active{transform:scale(.94)}
.nav-cta{margin-left:auto}

/* ================= 按钮 ================= */
.btn-primary{
  display:inline-flex;align-items:center;gap:7px;padding:10px 20px;border-radius:999px;
  background:var(--grad);color:#fff;font-weight:700;font-size:14.5px;
  box-shadow:0 10px 24px -8px rgba(14,165,233,.55);
  transition:transform .16s var(--spring),box-shadow .2s var(--ease),filter .2s;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px -10px rgba(14,165,233,.6);filter:brightness(1.05)}
.btn-primary:active{transform:scale(.96)}

/* ================= 页面骨架 ================= */
.page{max-width:760px;margin:0 auto;padding:28px 20px 80px}

/* 玻璃卡片基础 */
.glass-card{
  background:var(--glass);backdrop-filter:blur(18px) saturate(170%);-webkit-backdrop-filter:blur(18px) saturate(170%);
  border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}

/* ================= 页头（非首页标题） ================= */
.topbar{display:flex;align-items:center;gap:14px;padding:4px 4px 20px}
.topbar h1{font-size:26px;font-weight:800;letter-spacing:-.02em;line-height:1.2}
.topbar-sub{color:var(--muted);font-size:13px;display:block}
.back{
  display:flex;align-items:center;justify-content:center;width:40px;height:40px;flex-shrink:0;
  border-radius:50%;background:var(--glass);border:1px solid var(--line);
  box-shadow:0 4px 14px -6px rgba(14,116,233,.2);
  transition:transform .15s var(--spring),box-shadow .2s;
}
.back:hover{transform:translateX(-2px);box-shadow:0 8px 18px -6px rgba(14,116,233,.3)}
.back .ico{width:18px;height:18px}

/* ================= Hero ================= */
.hero{position:relative;overflow:hidden;padding:44px 34px 38px;margin-bottom:22px;
  background:linear-gradient(135deg,rgba(255,255,255,.8),rgba(224,242,254,.55));
}
.hero::before{
  content:"";position:absolute;top:-70px;right:-50px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(125,211,252,.5),transparent 65%);
  animation:floatA 18s var(--ease) infinite alternate;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:7px;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.75);border:1px solid var(--line);
  font-size:13px;font-weight:600;color:var(--sky-700);box-shadow:0 2px 8px rgba(14,116,233,.08);
}
.hero-title{
  margin:18px 0 10px;font-size:clamp(2.1rem,6.5vw,3.3rem);font-weight:800;
  line-height:1.12;letter-spacing:-.03em;text-wrap:balance;
  background:var(--grad-deep);-webkit-background-clip:text;background-clip:text;color:transparent;
  background-size:200% 200%;animation:gradientMove 7s var(--ease) infinite alternate;
}
@keyframes gradientMove{from{background-position:0% 0%}to{background-position:100% 100%}}
.hero-sub{color:var(--ink-2);font-size:16px;max-width:520px;margin:0}
.hero-stats{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.stat{
  flex:1;min-width:110px;padding:16px 18px;border-radius:18px;
  background:rgba(255,255,255,.65);border:1px solid var(--line);
  transition:transform .2s var(--spring),box-shadow .2s;
}
.stat:hover{transform:translateY(-3px);box-shadow:0 14px 30px -14px rgba(14,116,233,.35)}
.stat b{display:block;font-size:26px;font-weight:800;background:var(--grad-deep);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums}
.stat span{color:var(--muted);font-size:13px;font-weight:600}

/* ================= 发帖框 ================= */
.compose{display:flex;flex-wrap:wrap;gap:0 14px;padding:20px;margin-bottom:22px}
.compose:focus-within{box-shadow:var(--shadow-hover);border-color:var(--sky-300)}
.compose-body{flex:1;min-width:0}
.compose textarea{
  width:100%;background:none;border:0;outline:none;resize:none;
  color:var(--ink);font:inherit;font-size:17px;line-height:1.6;
  padding:6px 0 12px;min-height:56px;overflow:hidden;
}
.compose textarea::placeholder{color:#94a3b8}
.compose-bar{width:100%;display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line-soft);padding-top:14px;margin-top:4px}
.tools{display:flex;gap:2px;color:var(--sky-600)}
.tools .ico{width:19px;height:19px;padding:8px;box-sizing:content-box;border-radius:12px;
  transition:background .16s,transform .15s var(--spring);cursor:pointer}
.tools .ico:hover{background:var(--sky-100)}
.tools .ico:active{transform:scale(.9)}
.send{display:flex;align-items:center;gap:14px}
.counter{color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums;transition:color .2s}
.counter.warn{color:#f59e0b}.counter.over{color:#ef4444;font-weight:700}
.reply-box{padding-top:14px}

/* ================= 帖子卡片 ================= */
.feed{display:flex;flex-direction:column;gap:18px}
.post{
  display:flex;gap:14px;padding:22px 22px 16px;cursor:pointer;
  background:var(--glass);backdrop-filter:blur(18px) saturate(170%);-webkit-backdrop-filter:blur(18px) saturate(170%);
  border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);
  content-visibility:auto;contain-intrinsic-size:auto 210px;
  animation:rise .45s var(--ease) both;
}
.post:nth-child(2){animation-delay:.05s}.post:nth-child(3){animation-delay:.1s}
.post:nth-child(4){animation-delay:.15s}.post:nth-child(5){animation-delay:.2s}
.post:nth-child(6){animation-delay:.25s}.post:nth-child(7){animation-delay:.3s}
.post:nth-child(8){animation-delay:.35s}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.post:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.post-body{flex:1;min-width:0}
.post-head{display:flex;align-items:center;gap:5px;flex-wrap:wrap}
.name{font-weight:700;display:inline-flex;align-items:center;gap:3px}
.name:hover{color:var(--sky-700)}
.badge{width:17px;height:17px;color:var(--sky-500);fill:rgba(14,165,233,.12)}
.handle,.dot,.time{color:var(--muted);font-weight:400}
.time:hover{color:var(--sky-600)}
.del{margin-left:auto}
.del button{display:flex;padding:6px;border-radius:12px;color:var(--muted);transition:.16s}
.del button:hover{color:#ef4444;background:#fef2f2}
.del .ico{width:15px;height:15px}
.post-text{display:block;margin-top:6px;font-size:15.5px;line-height:1.75;
  color:var(--ink-2);white-space:pre-wrap;word-break:break-word}

/* 头像 */
.avatar{
  width:42px;height:42px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:17px;color:#fff;
  box-shadow:inset 0 0 0 2px rgba(255,255,255,.55),0 4px 12px -4px rgba(2,132,199,.4);
}
.av-0{background:linear-gradient(135deg,#7dd3fc,#0284c7)}
.av-1{background:linear-gradient(135deg,#38bdf8,#6366f1)}
.av-2{background:linear-gradient(135deg,#22d3ee,#0ea5e9)}
.av-3{background:linear-gradient(135deg,#a5b4fc,#38bdf8)}
.av-4{background:linear-gradient(135deg,#67e8f9,#0891b2)}

/* 操作栏 */
.actions{display:flex;align-items:center;justify-content:space-between;max-width:430px;
  margin:12px -6px 0;color:var(--muted);font-size:13px}
.act{display:inline-flex;align-items:center;gap:3px;padding:7px;border-radius:999px;
  transition:color .16s,background .16s,transform .15s var(--spring)}
.act .ico{width:18px;height:18px}
.act em{font-style:normal;font-variant-numeric:tabular-nums;min-width:1ch;padding:0 5px}
.act:active{transform:scale(.9)}
.act.reply:hover{color:var(--sky-600);background:var(--sky-100)}
.act.repost:hover{color:#059669;background:#ecfdf5}
.act.views:hover{color:var(--sky-600);background:var(--sky-100)}
.act.group{display:inline-flex;align-items:center}
.act.group .ico{padding:6px;width:18px;height:18px;box-sizing:content-box;border-radius:50%}
.act.group .ico:hover{color:var(--sky-600);background:var(--sky-100)}
.post .act.like:hover{color:#ec4899;background:#fdf2f8}
.act.like.on{color:#ec4899}
.act.like.on .fillable{fill:#ec4899;stroke:#ec4899}
.act.like.bump .fillable{animation:pop .4s var(--spring)}
@keyframes pop{0%{transform:scale(1)}45%{transform:scale(1.4)}70%{transform:scale(.88)}100%{transform:scale(1)}}

/* ================= 帖子详情 ================= */
.post.detail{display:block;padding:26px 26px 20px;cursor:default}
.post.detail:hover{transform:none}
.detail-head{display:flex;align-items:center;gap:14px}
.avatar.big{width:48px;height:48px;font-size:19px}
.detail-head .name{font-size:16px}
.detail-head .handle{display:block;color:var(--muted)}
.detail-text{font-size:20px;line-height:1.75;letter-spacing:-.01em;margin:16px 0;white-space:pre-wrap;word-break:break-word}
.detail-time{color:var(--muted);font-size:14px;padding-bottom:16px;border-bottom:1px solid var(--line-soft)}
.detail-stats{display:flex;gap:20px;flex-wrap:wrap;padding:16px 0;color:var(--muted);font-size:14px;
  border-bottom:1px solid var(--line-soft)}
.detail-stats b{color:var(--ink);margin-right:5px;font-weight:700}
.detail-actions{max-width:none;justify-content:space-around;font-size:15px;padding:6px 0;margin:0}

/* ================= 个人资料 ================= */
.banner{
  height:200px;position:relative;overflow:hidden;border-radius:24px;margin-bottom:22px;
  background:
    radial-gradient(500px 240px at 12% 0%,rgba(255,255,255,.55),transparent 60%),
    radial-gradient(520px 300px at 88% 30%,rgba(255,255,255,.4),transparent 60%),
    linear-gradient(120deg,#7dd3fc 0%,#38bdf8 45%,#0ea5e9 80%,#0369a1 100%);
  box-shadow:var(--shadow);
}
.banner::before,.banner::after{content:"";position:absolute;background:#fff;border-radius:999px;opacity:.5;filter:blur(2px)}
.banner::before{width:220px;height:42px;left:26%;bottom:34%;animation:drift 70s linear infinite}
.banner::after{width:140px;height:30px;left:64%;bottom:14%;animation:drift 100s linear infinite reverse}
.profile-head{display:flex;align-items:flex-end;justify-content:space-between;padding:0 8px;margin-top:-78px;position:relative;z-index:2}
.avatar.huge{width:132px;height:132px;font-size:52px;font-weight:800;
  border:5px solid #eef7fe;box-shadow:0 10px 28px -8px rgba(2,132,199,.45)}
.btn-outline{
  border:1px solid var(--sky-200);border-radius:999px;padding:9px 20px;margin-bottom:12px;
  font-weight:700;font-size:14.5px;color:var(--sky-700);background:var(--glass-strong);
  backdrop-filter:blur(10px);transition:.18s var(--ease);
}
.btn-outline:hover{background:#fff;box-shadow:0 8px 20px -8px rgba(14,165,233,.4)}
.profile-info{padding:14px 8px 0}
.profile-info h2{font-size:22px;font-weight:800;display:flex;align-items:center;gap:5px}
.profile-info .handle{color:var(--muted);margin:2px 0 12px}
.bio{white-space:pre-wrap;margin:0 0 14px;font-size:15px;line-height:1.7;color:var(--ink-2)}
.meta{color:var(--muted);display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:0 0 14px;font-size:14px}
.meta .ico{width:17px;height:17px}
.meta .sep{margin:0 3px}
.follows{margin:0 0 8px;color:var(--muted);font-size:14px}
.follows b{color:var(--ink);font-weight:800}

/* 标签页 → 胶囊 */
.tabs{display:flex;gap:8px;padding:4px 0 20px;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;padding:9px 18px;border-radius:999px;font-weight:600;font-size:14px;
  color:var(--ink-2);background:rgba(255,255,255,.5);border:1px solid var(--line);
  transition:color .18s,background .18s,transform .15s var(--spring),box-shadow .2s;
}
.tab:hover{background:#fff;transform:translateY(-1px)}
.tab.active{color:#fff;background:var(--grad);border-color:transparent;
  box-shadow:0 8px 18px -8px rgba(14,165,233,.55)}
.tab:active{transform:scale(.94)}
.profile-tabs{flex-wrap:nowrap}

/* ================= 空状态 / 404 ================= */
.empty{padding:56px 20px;text-align:center;color:var(--muted)}
.nf{text-align:center;padding:60px 24px}
.nf h2{font-size:30px;font-weight:800;background:var(--grad-deep);
  -webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:10px}
.nf p{color:var(--muted);margin-bottom:26px}
.nf .btn-primary{display:inline-flex;height:44px;padding:0 26px}

/* ================= 页脚 ================= */
.foot{
  max-width:760px;margin:0 auto;padding:0 20px 40px;text-align:center;
  color:var(--muted);font-size:13px;
}
.foot a:hover{color:var(--sky-600)}

/* ================= 移动端 ================= */
.tabbar{display:none}
.fab{display:none}

@media (max-width:700px){
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}
  .page{padding:20px 14px 40px}

  .nav-inner{padding:8px 12px;gap:10px}
  .brand .text{display:none}
  .navlinks{flex:1;justify-content:space-around;margin:0}
  .navlinks a{padding:7px 12px;font-size:13.5px}
  .nav-cta{display:none}

  .hero{padding:32px 22px 28px}
  .hero-title{font-size:clamp(1.8rem,9vw,2.4rem)}
  .hero-sub{font-size:15px}
  .stat{min-width:92px;padding:13px 12px}
  .stat b{font-size:22px}

  .compose{padding:16px 14px}
  .compose textarea{font-size:16px}
  .counter{display:none}
  .tools .ico{padding:7px}

  .post{padding:18px 16px 12px;gap:12px}
  .post-text{font-size:15px}
  .actions{justify-content:space-between;max-width:none;font-size:12px}
  .act{padding:6px}
  .act .ico{width:17px;height:17px}
  .act.group .ico{padding:5px;width:17px;height:17px}
  .act .views em{display:none}

  .detail-text{font-size:18px}
  .banner{height:140px;border-radius:20px}
  .profile-head{margin-top:-52px}
  .avatar.huge{width:104px;height:104px;font-size:42px}
  .topbar h1{font-size:22px}

  /* 底部导航（毛玻璃浅色） */
  .tabbar{
    display:flex;position:fixed;left:10px;right:10px;bottom:10px;z-index:70;
    background:rgba(255,255,255,.7);backdrop-filter:blur(20px) saturate(170%);-webkit-backdrop-filter:blur(20px) saturate(170%);
    border:1px solid var(--line);border-radius:22px;
    box-shadow:0 12px 34px -10px rgba(14,116,233,.3);
    padding:7px 6px calc(7px + env(safe-area-inset-bottom));justify-content:space-around;
  }
  .tabbar a{
    display:flex;flex-direction:column;align-items:center;gap:3px;color:var(--muted);
    padding:5px 13px;border-radius:14px;transition:color .18s,background .18s;
  }
  .tabbar a.active{color:var(--sky-600);background:var(--sky-100)}
  .tabbar .ico{width:22px;height:22px}
  .tabbar .nav-label{font-size:10px;font-weight:600;line-height:1}

  /* 悬浮发帖 */
  .fab{
    display:flex;position:fixed;right:18px;bottom:calc(88px + env(safe-area-inset-bottom));z-index:75;
    width:56px;height:56px;border-radius:50%;align-items:center;justify-content:center;
    background:var(--grad);color:#fff;font-size:28px;line-height:1;
    box-shadow:0 12px 28px -8px rgba(14,165,233,.6);
    transition:transform .18s var(--spring),box-shadow .2s;
  }
  .fab:hover{transform:scale(1.06);box-shadow:0 16px 32px -8px rgba(14,165,233,.65)}
  .fab:active{transform:scale(.92)}
}

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

/* ================= 页面切换动效 ================= */
/* 1) 跨文档视图过渡：Chromium 原生，零 JS，最流畅 */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vtOut .3s var(--ease) both; }
::view-transition-new(root) { animation: vtIn .38s var(--ease) both; }
@keyframes vtOut { to { opacity: 0; transform: translateY(-10px); } }
@keyframes vtIn  { from { opacity: 0; transform: translateY(12px); } }

/* 2) 非原生支持的浏览器：JS 回退（淡出 + 页面入场） */
html.no-vt .page { animation: pageIn .38s var(--ease) both; }
@keyframes pageIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
html.no-vt { transition: opacity .2s var(--ease), transform .2s var(--ease); }
html.no-vt.leaving { opacity: 0; transform: translateY(-6px); }

@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}

/* ================= 媒体网格（模仿 X） ================= */
.media{
  margin-top:12px;display:grid;gap:2px;border-radius:16px;overflow:hidden;
  background:rgba(15,23,42,.06);border:1px solid rgba(255,255,255,.6);
}
.media .mi{display:block;position:relative;overflow:hidden;min-width:0;min-height:0;background:#0b1220}
.media .mi img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .45s var(--ease)}
.media .mi:hover img{transform:scale(1.015)}
.media.n1{grid-template-columns:1fr}
.media.n1 .mi img{max-height:520px;object-fit:cover}
.media.n1 .mi.vid video{width:100%;max-height:520px;background:#000}
.media.n2{grid-template-columns:1fr 1fr;aspect-ratio:2 / 1}
.media.n3{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;aspect-ratio:1 / 1}
.media.n3 .mi:first-child{grid-row:1 / 3}
.media.n4{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;aspect-ratio:1 / 1}
.media.n2 .mi,.media.n3 .mi,.media.n4 .mi{height:100%}
.media video{width:100%;height:100%;object-fit:contain;background:#000;display:block}

/* 帖子右上角菜单 */
.post-menu{margin-left:auto;display:flex;align-items:center}
.menu-btn{display:flex;padding:6px;border-radius:12px;color:var(--muted);transition:.16s}
.menu-btn:hover{background:var(--sky-100);color:var(--sky-700)}
.menu-btn .ico{width:16px;height:16px}

/* ================= 发帖工具栏 ================= */
.tool-btn{display:flex;cursor:pointer;color:var(--sky-600);border-radius:12px;transition:background .16s}
.tool-btn .ico{width:19px;height:19px;padding:8px;box-sizing:content-box;border-radius:12px}
.tool-btn:hover{background:var(--sky-100)}
.tool-btn:active .ico{transform:scale(.92)}

/* 预览网格 */
.previews{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:8px 0 10px}
.pv{position:relative;aspect-ratio:1 / 1;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);background:#0b1220}
.pv img,.pv video{width:100%;height:100%;object-fit:cover;display:block}
.pv .rm{position:absolute;top:4px;right:4px;width:22px;height:22px;border-radius:50%;
  background:rgba(15,23,42,.72);color:#fff;display:grid;place-items:center;font-size:13px;line-height:1}
.pv .rm:hover{background:#ef4444}
.pv .vtag{position:absolute;left:4px;bottom:4px;font-size:10px;font-weight:600;
  background:rgba(0,0,0,.62);color:#fff;padding:1px 5px;border-radius:6px}

/* 上传进度条 */
.up-bar{height:4px;border-radius:99px;background:rgba(15,23,42,.08);overflow:hidden;margin:2px 0 10px}
.up-bar i{display:block;height:100%;width:0;background:var(--grad);transition:width .18s var(--ease)}

/* 字数环 */
.ring{--p:0;width:30px;height:30px;border-radius:50%;position:relative;flex-shrink:0;
  background:conic-gradient(var(--sky-500) calc(var(--p) * 1%), #dbeafe 0);
  transition:background .15s linear}
.ring b{position:absolute;inset:3px;border-radius:50%;background:#fff;display:grid;place-items:center;
  font-size:11px;font-weight:700;color:var(--muted);font-variant-numeric:tabular-nums}
.ring.warn b{color:#f59e0b}
.ring.over b{color:#ef4444}

/* ================= 首屏进度 / 提示 ================= */
.splash{
  position:fixed;inset:0;z-index:200;display:grid;place-items:center;
  background:linear-gradient(180deg,#e8f4fe,#f8fcff);
  transition:opacity .45s var(--ease),visibility .45s;
}
.splash.hide{opacity:0;visibility:hidden;pointer-events:none}
.splash-inner{text-align:center;width:min(280px,72vw)}
.splash-logo{font-size:46px;animation:bob 2.2s var(--ease) infinite alternate}
@keyframes bob{from{transform:translateY(0)}to{transform:translateY(-9px)}}
.splash-name{font-weight:800;font-size:19px;margin:12px 0 20px;letter-spacing:.01em}
.splash-name em{font-style:normal;background:var(--grad-deep);-webkit-background-clip:text;background-clip:text;color:transparent}
.splash-bar{height:6px;border-radius:99px;background:rgba(15,23,42,.09);overflow:hidden}
.splash-bar i{display:block;height:100%;width:0;border-radius:99px;background:var(--grad);
  transition:width .25s var(--ease)}
.splash-tip{margin-top:11px;font-size:12.5px;color:var(--muted)}

/* 轻提示 */
.toast{
  position:fixed;left:50%;top:18px;z-index:150;
  background:rgba(15,23,42,.9);color:#fff;padding:10px 18px;border-radius:999px;
  font-size:14px;box-shadow:0 14px 34px rgba(15,23,42,.28);
  animation:toastIn .32s var(--ease) both;
}
@keyframes toastIn{from{opacity:0;transform:translate(-50%,-10px)}to{opacity:1;transform:translate(-50%,0)}}

@media (max-width:700px){
  .media.n1 .mi img{max-height:420px}
  .previews{grid-template-columns:repeat(3,1fr)}
}