/*
牛师傅主页主题（Apple 浅色 × rainzt 精致感）
字体：标题/引言 = 霞鹜文楷；正文 = 系统苹方；等宽 = SF Mono
*/

/* ===== 设计变量 ===== */
:root{
  --bg:#f5f5f7; --bg2:#ffffff; --fg:#1d1d1f; --fg2:#6e6e73; --fg3:#86868b;
  --line:rgba(0,0,0,.07); --accent:#0071e3; --accent-soft:rgba(0,113,227,.08);
  --kai:'LXGW WenKai','STKaiti','KaiTi','PingFang SC',sans-serif;
  --sans:-apple-system,BlinkMacSystemFont,'SF Pro SC','SF Pro Text','Helvetica Neue','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --mono:'SF Mono','JetBrains Mono',ui-monospace,Menlo,monospace;
  --shadow:0 1px 2px rgba(0,0,0,.04),0 8px 28px rgba(0,0,0,.07);
  --shadow-lg:0 2px 6px rgba(0,0,0,.05),0 18px 44px rgba(0,0,0,.12);
  --radius:16px;
}

/* ===== 基础 ===== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--fg);font-size:15px;line-height:1.8;-webkit-font-smoothing:antialiased;background-image:radial-gradient(ellipse 80% 50% at 50% -10%,rgba(0,113,227,.05),transparent)}
img{max-width:100%;height:auto}
a{color:var(--accent);text-decoration:none;transition:color .2s,opacity .2s}
a:hover{opacity:.8}
::selection{background:var(--accent);color:#fff}

/* ===== 顶部导航 ===== */
nav.site-nav{position:sticky;top:0;z-index:100;backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);background:color-mix(in srgb,var(--bg) 74%,transparent);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1020px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:12px 20px}
.nav-brand{font-family:var(--kai);font-size:17px;font-weight:600;color:var(--fg);letter-spacing:.04em}
.nav-brand em{font-style:normal;color:var(--accent)}
.nav-meta{display:flex;align-items:center;gap:18px}
.nav-clock{font-size:11.5px;color:var(--fg2);letter-spacing:.08em;font-family:var(--mono)}
.nav-meta a{color:var(--fg2);font-size:13px}
.nav-meta a:hover{color:var(--accent)}

/* ===== 一言 Banner ===== */
.home-banner{position:relative;margin:0 0 24px;padding:56px 30px;border-radius:24px;color:#fff;background:linear-gradient(128deg,#0a3f8f 0%,#0a64d1 34%,#2684e8 62%,#7cc6f8 100%);overflow:hidden;text-align:center;box-shadow:0 2px 8px rgba(0,90,200,.18),0 24px 60px rgba(0,90,200,.28)}
/* 装饰：光环 + 细环 */
.banner-ring{position:absolute;border:1px solid rgba(255,255,255,.22);border-radius:50%;animation:ringFloat 14s ease-in-out infinite}
.banner-ring.r1{width:340px;height:340px;top:-120px;right:-70px}
.banner-ring.r2{width:200px;height:200px;bottom:-60px;left:-40px;animation-delay:-7s}
.banner-glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;animation:glowFloat 9s ease-in-out infinite}
.banner-glow.b1{width:300px;height:300px;background:rgba(255,255,255,.32);top:-100px;left:-60px}
.banner-glow.b2{width:240px;height:240px;background:rgba(140,210,255,.5);bottom:-90px;right:-40px;animation-delay:-4.5s}
@keyframes glowFloat{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(26px,20px) scale(1.12)}}
@keyframes ringFloat{0%,100%{transform:translate(0,0) rotate(0deg)}50%{transform:translate(-14px,12px) rotate(8deg)}}
.banner-inner{position:relative;z-index:1}
.banner-kicker{display:inline-block;font-size:10.5px;letter-spacing:.5em;font-family:var(--mono);opacity:.85;padding:5px 14px;border:1px solid rgba(255,255,255,.35);border-radius:999px}
.banner-quote{font-family:var(--kai);font-size:clamp(22px,3.6vw,34px);font-weight:400;margin-top:22px;line-height:1.8;letter-spacing:.05em;text-shadow:0 2px 30px rgba(0,0,0,.22)}
.banner-from{margin-top:16px;font-size:13px;opacity:.85}

/* ===== 三栏布局（Hugo Stack 式：左 230 + 中自适应 + 右 280） ===== */
.home-grid{max-width:1120px;margin:0 auto;padding:26px 20px 20px;display:grid;grid-template-columns:230px minmax(0,1fr) 280px;gap:22px;align-items:start}
.home-main{min-width:0}
.home-side{display:flex;flex-direction:column;gap:14px;position:sticky;top:72px}

/* 博主资料卡 */
.profile-card{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:24px 16px;box-shadow:var(--shadow);text-align:center;transition:box-shadow .3s,transform .3s}
.profile-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.profile-avatar{width:76px;height:76px;margin:0 auto 12px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:38px;background:linear-gradient(135deg,#0071e3,#5ac8fa);box-shadow:0 8px 24px rgba(0,113,227,.3)}
.profile-name{font-family:var(--kai);font-size:17px;font-weight:600;color:var(--fg)}
.profile-desc{margin-top:8px;font-size:12px;color:var(--fg3);line-height:1.8}
.profile-links{margin-top:14px;display:flex;justify-content:center;gap:8px}
.profile-links a{border:1px solid var(--line);border-radius:999px;padding:4px 13px;font-size:11.5px;color:var(--fg2);opacity:1;transition:all .25s}
.profile-links a:hover{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.menu-list li b a{color:var(--accent);opacity:1;font-size:14px}

/* ===== 侧边栏卡片 ===== */
.side-card{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:box-shadow .3s,transform .3s}
.side-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.side-card h3{font-family:var(--kai);font-size:14.5px;font-weight:600;letter-spacing:.1em;color:var(--fg);margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-list{list-style:none}
.side-list li{display:flex;justify-content:space-between;align-items:center;padding:8px 0;font-size:13px}
.side-list li+li{border-top:1px dashed rgba(0,0,0,.05)}
.side-list li span{color:var(--fg3)}
.side-list li b{color:var(--fg);font-weight:500;text-align:right;max-width:62%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-list .mono{font-family:var(--mono);font-size:12px}
.season-word{font-family:var(--kai);font-size:24px;font-weight:600;color:var(--accent)}
.season-desc{margin-top:10px;font-size:13px;color:var(--fg2);line-height:1.9}
.season-poem{margin-top:12px;font-family:var(--kai);font-size:13.5px;color:var(--fg3);font-style:italic}
.side-links{display:flex;flex-wrap:wrap;gap:8px}
.side-links a,.side-links .niu-links a{border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-size:12px;color:var(--fg2);transition:all .25s;opacity:1}
.side-links a:hover,.side-links .niu-links a:hover{color:var(--accent);border-color:var(--accent);background:var(--accent-soft);opacity:1}
.side-links .niu-links{gap:8px}
.side-about{font-size:12.5px;color:var(--fg3);line-height:1.9;margin-bottom:12px}

/* ===== 区块标题 ===== */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px}
.sec-head h2{font-family:var(--kai);font-size:16px;font-weight:600;letter-spacing:.18em;color:var(--fg)}
.sec-head h2::before{content:'';display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-right:10px;vertical-align:2px}
.sec-head .more{font-size:12px;color:var(--fg3)}
.sec-head .more:hover{color:var(--accent)}

/* ===== 文章卡片 ===== */
.post-cards{display:flex;flex-direction:column;gap:16px}
.post-card{display:flex;background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:transform .3s,box-shadow .3s;animation:fadeUp .6s both;box-shadow:var(--shadow)}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.post-card-img{width:30%;min-height:150px;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.92);font-size:36px;position:relative;overflow:hidden}
.post-card-img::after{content:'';position:absolute;inset:0;background:linear-gradient(160deg,rgba(255,255,255,.22),transparent 45%)}
.post-card-emoji{filter:drop-shadow(0 6px 16px rgba(0,0,0,.3));position:relative;z-index:1}
.post-card-body{flex:1;padding:18px 22px;display:flex;flex-direction:column;min-width:0;justify-content:center}
.post-card-meta{display:flex;gap:12px;align-items:center;margin-bottom:10px}
.post-card-meta .tag{font-size:10.5px;color:var(--accent);background:var(--accent-soft);border-radius:999px;padding:2px 11px}
.post-card-meta .date{font-size:11.5px;color:var(--fg3);font-family:var(--mono)}
.post-card-title{font-family:var(--kai);font-size:18px;font-weight:600;letter-spacing:.02em;line-height:1.55;color:var(--fg);transition:color .25s}
.post-card:hover .post-card-title{color:var(--accent)}
.post-card-summary{margin-top:10px;font-size:13px;color:var(--fg3);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
/* 大图模式（有特色图，Stack 式：图上文下） */
.post-card.has-image{flex-direction:column}
.post-card.has-image .post-card-img{width:100%;min-height:auto;aspect-ratio:16/8}
.post-card.has-image .post-card-body{padding:18px 22px 20px}

/* ===== 文章列表（归档页） ===== */
.post-list{list-style:none}
.post-list li{display:flex;align-items:baseline;gap:18px;padding:16px 10px;border-bottom:1px solid var(--line);cursor:pointer;transition:background .25s,padding-left .25s;animation:fadeUp .6s both}
.post-list li:hover{background:var(--accent-soft);padding-left:16px}
.post-list .num{font-size:12px;color:var(--fg3);font-family:var(--mono);min-width:28px}
.post-list .title{font-family:var(--kai);font-size:15.5px;color:var(--fg);flex:1}
.post-list li:hover .title{color:var(--accent)}
.post-list .date{font-size:12px;color:var(--fg3);font-family:var(--mono);white-space:nowrap}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ===== 首页统计 ===== */
.stats{margin-top:34px;display:flex;gap:44px;font-size:12px;color:var(--fg3);padding:18px 6px 0;border-top:1px dashed var(--line)}
.stats b{display:block;font-family:var(--mono);font-size:23px;font-weight:600;color:var(--fg)}
.stats span{letter-spacing:.12em}

/* ===== 底部三栏 ===== */
.foot-msg{max-width:1020px;margin:44px auto 0;padding:38px 20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.foot-msg div{color:var(--fg2);font-size:14px}
.foot-msg b{font-family:var(--kai);color:var(--fg);font-weight:600;font-size:15px}
.foot-msg .sub{color:var(--fg3);font-size:10.5px;letter-spacing:.14em;margin-top:2px}

/* ===== 页脚 ===== */
footer.site-footer{max-width:1020px;margin:0 auto;padding:36px 20px 46px;text-align:center;color:var(--fg3);font-size:12px}
footer.site-footer .motto{font-family:var(--kai);font-size:15px;color:var(--fg2);margin-bottom:12px}
footer.site-footer .links{margin-top:10px;display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
footer.site-footer .links a{color:var(--fg3);opacity:1}
footer.site-footer .links a:hover{color:var(--accent)}

/* ===== 文章页 ===== */
.single-wrap{max-width:760px;margin:0 auto;padding:64px 20px 40px}
.single-wrap .post-title{font-family:var(--kai);font-size:clamp(28px,4.4vw,40px);font-weight:600;letter-spacing:.02em;line-height:1.45}
.single-wrap .post-meta{margin:16px 0 26px;color:var(--fg3);font-size:12.5px;font-family:var(--mono);display:flex;gap:18px;flex-wrap:wrap}
.single-wrap .post-meta .views{color:var(--accent)}
.niu-ai-summary{background:var(--accent-soft);border-left:3px solid var(--accent);padding:13px 18px;border-radius:8px;margin:0 0 26px;font-size:14px;line-height:1.9}
.single-wrap .entry-content{font-size:15.5px;line-height:2.1;color:var(--fg)}
.single-wrap .entry-content h2{font-family:var(--kai);font-size:23px;margin:40px 0 16px;letter-spacing:.03em}
.single-wrap .entry-content h3{font-family:var(--kai);font-size:19px;margin:30px 0 12px}
.single-wrap .entry-content p{margin:16px 0}
.single-wrap .entry-content blockquote{border-left:3px solid var(--accent);padding:10px 20px;color:var(--fg2);background:var(--bg2);border-radius:0 8px 8px 0;margin:20px 0;font-family:var(--kai)}
.single-wrap .entry-content pre,.single-wrap .entry-content code{font-family:var(--mono);background:var(--bg2);border-radius:6px}
.single-wrap .entry-content pre{padding:16px;overflow-x:auto;font-size:13px;line-height:1.7}
.single-wrap .entry-content code{padding:2px 7px;font-size:13px}
.single-wrap .entry-content img{border-radius:12px;margin:12px 0}
.single-wrap .entry-content a{border-bottom:1px solid var(--accent);opacity:1}
.single-wrap .entry-content ul,.single-wrap .entry-content ol{padding-left:26px;margin:16px 0}
.single-wrap .post-nav{margin-top:44px;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:var(--fg3);border-top:1px solid var(--line);padding-top:22px}
.single-wrap .post-nav a{color:var(--fg2);font-family:var(--kai)}
.single-wrap .post-nav a:hover{color:var(--accent)}

/* ===== 评论区 ===== */
.comments-wrap{max-width:760px;margin:0 auto;padding:20px 20px 64px}
.comments-wrap h3{font-family:var(--kai);font-size:17px;margin-bottom:20px}
.comment-list{list-style:none}
.comment-list li{border-bottom:1px solid var(--line);padding:18px 0}
.comment-list .comment-author{font-size:13px;font-weight:600}
.comment-list .comment-meta{font-size:11px;color:var(--fg3);margin:2px 0 10px}
.comment-list .comment-body{font-size:14px;line-height:1.9}
.comment-list .children{list-style:none;padding-left:38px;margin-top:14px}
#respond{margin-top:32px}
#respond input[type=text],#respond input[type=email],#respond textarea{width:100%;border:1px solid var(--line);background:var(--bg2);color:var(--fg);border-radius:10px;padding:11px 14px;font-size:14px;font-family:inherit;margin-bottom:12px;transition:border-color .2s}
#respond input:focus,#respond textarea:focus{outline:none;border-color:var(--accent)}
#respond textarea{min-height:130px}
#respond input[type=submit]{background:var(--accent);color:#fff;border:none;border-radius:999px;padding:11px 30px;font-size:14px;cursor:pointer;transition:opacity .2s,transform .2s}
#respond input[type=submit]:hover{opacity:.88;transform:translateY(-1px)}

/* ===== 归档 / 页面 / 404 ===== */
.archive-wrap,.page-wrap{max-width:760px;margin:0 auto;padding:64px 20px 44px}
.archive-wrap h1,.page-wrap h1{font-family:var(--kai);font-size:30px;font-weight:600;margin-bottom:26px;letter-spacing:.04em}
.page-wrap .entry-content{margin-top:22px}
.page-404{text-align:center;padding-top:110px}
.page-404 h1{font-size:64px;font-weight:700;color:var(--accent);font-family:var(--mono)}
.page-404 p{color:var(--fg3);margin-top:12px}
.page-404 a{margin-top:22px;display:inline-block}

/* ===== 欢迎弹窗（rainzt 式毛玻璃 toast） ===== */
.welcome-toast{position:fixed;right:max(1.25rem,env(safe-area-inset-right));bottom:max(1.25rem,env(safe-area-inset-bottom));z-index:1000;display:grid;width:min(24rem,calc(100vw - 2rem));padding:1rem 2.6rem 1rem 1rem;border:1px solid color-mix(in srgb,var(--accent) 24%,transparent);border-radius:1rem;grid-template-columns:auto 1fr;align-items:center;gap:.85rem;background:color-mix(in srgb,var(--bg2) 88%,transparent);box-shadow:0 1rem 2.5rem rgba(15,23,42,.16),inset 0 1px rgba(255,255,255,.35);opacity:0;pointer-events:none;transform:translateY(calc(100% + 2rem)) scale(.96);backdrop-filter:blur(18px) saturate(1.2);-webkit-backdrop-filter:blur(18px) saturate(1.2);transition:opacity .32s,transform .45s cubic-bezier(.22,1,.36,1)}
.welcome-toast.show{opacity:1;pointer-events:auto;transform:translateY(0) scale(1)}
.toast-ico{font-size:26px}
.toast-title{font-family:var(--kai);font-size:14.5px;font-weight:600;color:var(--fg)}
.toast-sub{font-size:12px;color:var(--fg3);margin-top:2px}
.toast-close{position:absolute;top:.55rem;right:.7rem;border:none;background:none;color:var(--fg3);font-size:13px;cursor:pointer;padding:4px;border-radius:50%;transition:color .2s}
.toast-close:hover{color:var(--fg)}

/* 公告卡 */
.announce-card h3{color:#e8590c}
.announce-card{border-left:3px solid #ff922b}
.announce-body{font-size:12.5px;color:var(--fg2);line-height:1.9}
.announce-body p{margin:4px 0}

/* ===== 响应式 ===== */
@media(max-width:1080px){
  .home-grid{grid-template-columns:230px minmax(0,1fr)}
  .right-side{grid-column:1 / -1;display:flex;flex-direction:row;flex-wrap:wrap;position:static}
  .right-side .side-card{flex:1 1 240px}
}
@media(max-width:760px){
  .home-grid{grid-template-columns:1fr}
  .home-side{position:static;order:2;flex-direction:column}
  .left-side .side-card{width:100%}
  .home-main{order:1}
  .right-side{order:3}
  .right-side .side-card{flex:1 1 100%}
}
@media(max-width:640px){
  .nav-inner{padding:10px 16px}
  .nav-brand{font-size:15px}
  .nav-meta .nav-link{display:none}
  .home-grid{padding:18px 14px 20px;gap:14px}
  .side-card{padding:16px}
  .profile-card{padding:20px 14px}
  .post-card,.post-card.has-image{flex-direction:column}
  .post-card-img,.post-card.has-image .post-card-img{width:100%;min-height:110px;aspect-ratio:16/7}
  .post-card-body{padding:14px 16px 16px}
  .post-list li{flex-wrap:wrap;gap:6px}
  .post-list .date{margin-left:46px}
  .foot-msg{flex-direction:column;padding:30px 16px}
  .home-banner{padding:42px 18px;border-radius:18px}
  .banner-kicker{font-size:9.5px}
  .welcome-toast{right:max(.75rem,env(safe-area-inset-right));bottom:max(.75rem,env(safe-area-inset-bottom));width:min(20rem,calc(100vw - 1.5rem))}
  footer.site-footer{padding:30px 16px 40px}
}