/* 如是有为 · 亮色主题（只做亮色，不做深色模式） */
:root{
  --bg:#fbfaf6;
  --paper:#ffffff;
  --ink:#1b1f27;
  --ink-2:#3d4350;
  --muted:#7a7f8a;
  --line:#e7e3d8;
  --line-soft:#f0ede4;
  --blue:#2445a8;
  --blue-soft:#eef2fc;
  --gold:#b58a3a;
  --gold-soft:#f8f1e2;
  --green:#2f7d5b;
  --green-soft:#ebf5ef;
  --serif:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --mono:"SF Mono","JetBrains Mono",Consolas,"Courier New",monospace;
  color-scheme:light;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;color:var(--ink);font:16px/1.8 var(--sans);
  background-color:var(--bg);
  /* 极淡的电路走线底纹 */
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Cg fill='none' stroke='%232445a8' stroke-opacity='.045' stroke-width='1.2'%3E%3Cpath d='M0 40h40l20 20h40l20-20h40M0 120h30l15-15h50l15 15h50M80 0v30l-15 15v30M120 160v-30l15-15V90'/%3E%3C/g%3E%3Cg fill='%232445a8' fill-opacity='.06'%3E%3Ccircle cx='60' cy='60' r='2.5'/%3E%3Ccircle cx='100' cy='60' r='2.5'/%3E%3Ccircle cx='65' cy='75' r='2.5'/%3E%3Ccircle cx='135' cy='90' r='2.5'/%3E%3C/g%3E%3C/svg%3E");
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
img{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}

/* 顶栏 */
.site-header{position:sticky;top:0;z-index:10;background:rgba(251,250,246,.88);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.site-header::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--blue) 0 62%,var(--gold) 62% 100%)}
.bar{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;color:var(--blue);font:700 20px/1 var(--serif);letter-spacing:.12em}
.brand:hover{text-decoration:none}
.brand-text{display:flex;flex-direction:row;align-items:baseline;gap:8px;flex-wrap:wrap}
.brand-title{color:var(--ink);font:700 20px/1 var(--serif);letter-spacing:.12em}
.brand-sub{font:500 15px/1 var(--serif);letter-spacing:.14em;color:var(--gold);white-space:nowrap}
.brand-sub::before{content:"·";margin-right:8px;color:var(--muted);font-weight:400}
.brand .brand-sub{color:var(--gold)}
.logo{width:30px;height:30px}
nav{display:flex;gap:4px}
nav a{color:var(--ink-2);padding:6px 10px;border-radius:6px;font-size:15px}
nav a:hover{background:var(--blue-soft);color:var(--blue);text-decoration:none}

/* 首页大图区 */
.hero{border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fff 0%,rgba(255,255,255,0) 100%)}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr auto;gap:40px;align-items:center;padding:56px 20px 60px}
.kicker{font:600 12px/1 var(--mono);letter-spacing:.22em;color:var(--gold);margin:0 0 14px;text-transform:uppercase}
.hero h1{font:700 64px/1.1 var(--serif);letter-spacing:.14em;margin:0}
.subtitle{font:500 20px/1.6 var(--serif);color:var(--blue);letter-spacing:.3em;margin:14px 0 18px}
.lead{color:var(--ink-2);font-size:16.5px;max-width:30em;margin:0 0 26px}
.hero-links{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:10px 20px;border-radius:999px;background:var(--blue);color:#fff;font-size:15px;box-shadow:0 6px 18px -8px rgba(36,69,168,.6)}
.btn:hover{text-decoration:none;background:#1d3a92}
.btn.ghost{background:transparent;color:var(--blue);border:1px solid #c8d3f0;box-shadow:none}
.btn.ghost:hover{background:var(--blue-soft)}
.hero-figure{margin:0}
/* 图片放进一个“芯片封装”框：四边引脚 */
.package{position:relative;padding:14px;border-radius:18px;background:#fff;border:1.5px solid #cfd8ef;box-shadow:0 30px 60px -30px rgba(27,31,39,.35)}
.package::before,.package::after{content:"";position:absolute;pointer-events:none}
.package::before{left:14%;right:14%;top:-9px;bottom:-9px;
  background:repeating-linear-gradient(90deg,#b9c5e6 0 3px,transparent 3px 22px) top/100% 8px no-repeat,
             repeating-linear-gradient(90deg,#b9c5e6 0 3px,transparent 3px 22px) bottom/100% 8px no-repeat}
.package::after{top:14%;bottom:14%;left:-9px;right:-9px;
  background:repeating-linear-gradient(180deg,#b9c5e6 0 3px,transparent 3px 22px) left/8px 100% no-repeat,
             repeating-linear-gradient(180deg,#b9c5e6 0 3px,transparent 3px 22px) right/8px 100% no-repeat}
.package img{display:block;border-radius:10px;width:100%;height:auto}
.sutra-vertical{writing-mode:vertical-rl;font:400 17px/2.1 var(--serif);letter-spacing:.3em;color:var(--ink-2);margin:0;padding:0 14px 0 0;border-right:1px solid var(--gold);height:12.5em;align-self:center}
.sutra-vertical span{display:block;margin-right:.8em;color:var(--gold);font-size:13px;letter-spacing:.25em;padding-top:5em}

/* 主体两栏 */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;padding:36px 0 20px}
.section-title{font:700 14px/1 var(--sans);letter-spacing:.2em;color:var(--muted);margin:6px 0 8px;display:flex;align-items:center;gap:12px}
.section-title::after{content:"";flex:1;height:1px;background:var(--line)}
.page-head{padding:34px 0 12px;border-bottom:1px solid var(--line);margin-bottom:6px}
.page-title{font:700 32px/1.3 var(--serif);margin:0 0 6px;letter-spacing:.04em}
.page-head .kicker{margin-bottom:10px}

/* 文章列表 */
.item{position:relative;padding:22px 0 22px 20px;border-bottom:1px solid var(--line-soft)}
.item::before{content:"";position:absolute;left:0;top:30px;width:7px;height:7px;border:1.5px solid var(--gold);border-radius:50%}
.item .date{font:500 12.5px/1 var(--mono);color:var(--gold);letter-spacing:.06em}
.item h2{font:700 20px/1.5 var(--serif);margin:8px 0 6px}
.item h2 a{color:var(--ink)}
.item h2 a:hover{color:var(--blue);text-decoration:none}
.desc{margin:0 0 10px;color:var(--ink-2);font-size:15px;line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 标签 */
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:12.5px;line-height:1;padding:6px 9px;border-radius:6px;border:1px solid transparent;white-space:nowrap}
.chip:hover{text-decoration:none;filter:brightness(.96)}
.chip small{font:11px/1 var(--mono);opacity:.65}
.chip.model{background:var(--blue-soft);color:var(--blue);font-family:var(--mono);letter-spacing:.02em}
.chip.company{background:var(--gold-soft);color:#8a6420}
.chip.tag{background:var(--green-soft);color:var(--green)}
.chip.more{background:#f3f2ee;color:var(--muted)}
.chips.big{gap:10px;padding:24px 0 40px}
.chips.big .chip{font-size:15px;padding:9px 13px}

/* 侧栏 */
.sidebar{display:flex;flex-direction:column;gap:18px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px 18px 16px;box-shadow:0 1px 0 rgba(0,0,0,.02)}
.card-title{display:flex;justify-content:space-between;align-items:baseline;font:700 16px/1.4 var(--serif);margin:0 0 10px;letter-spacing:.04em}
.more-link{font:400 12.5px var(--sans);letter-spacing:0}
.card .muted{font-size:14px;line-height:1.7;margin:0}
.about{display:flex;gap:14px;align-items:flex-start}
.avatar{width:72px;height:72px;border-radius:50%;object-fit:cover;flex:none;border:2px solid #fff;box-shadow:0 0 0 1.5px var(--gold)}
.qr-card{display:flex;gap:14px;align-items:center}
.qr-card img{width:108px;height:108px;flex:none;border-radius:8px;border:1px solid var(--line)}
.qr-card .card-title{margin-bottom:6px}

/* 正文 */
.post{max-width:760px;margin:0 auto;padding:44px 0 10px}
.post-head{padding-bottom:22px;margin-bottom:30px;border-bottom:1px solid var(--line)}
.post-head .date{font:500 13px/1 var(--mono);color:var(--gold);letter-spacing:.06em}
.post-title{font:700 32px/1.45 var(--serif);margin:12px 0 16px;letter-spacing:.02em}
.orig{font-size:13.5px;margin:14px 0 0}
.content{font:400 17px/1.95 var(--sans);overflow-wrap:break-word;color:#23272f}
.content p{margin:0 0 1.05em}
.content h2{font:650 23px/1.55 var(--sans);margin:2em 0 .7em;padding-left:14px;border-left:4px solid var(--blue)}
.content h3{font:650 19px/1.55 var(--sans);margin:1.7em 0 .6em}
.content h4{font-size:17px;margin:1.4em 0 .5em}
.content strong{color:#111;background:linear-gradient(transparent 62%,var(--gold-soft) 62%)}
.content img{display:block;max-width:100%;height:auto;margin:22px auto;border-radius:8px}
.content blockquote{margin:1.4em 0;padding:12px 18px;background:var(--gold-soft);border-left:3px solid var(--gold);border-radius:0 8px 8px 0;color:var(--ink-2)}
.content blockquote p:last-child{margin-bottom:0}
.content pre,.content code{font-family:var(--mono);font-size:14px}
.content code{background:#f2f1ec;padding:2px 5px;border-radius:4px}
.content pre{background:#f7f6f2;border:1px solid var(--line);padding:14px;border-radius:8px;overflow-x:auto}
.content pre code{background:none;padding:0}
.content table{border-collapse:collapse;display:block;max-width:100%;overflow-x:auto;font:400 15px/1.7 var(--sans);margin:1.3em 0;overscroll-behavior-x:contain}
.content th,.content td{border:1px solid var(--line);padding:9px 12px;min-width:7em;max-width:26em;text-align:left;vertical-align:top;overflow-wrap:break-word}
.content th{background:#f6f4ee;font-weight:650}
.content tbody tr:nth-child(even){background:#fcfbf8}
.content math{font-family:"STIX Two Math","Cambria Math","Latin Modern Math",math;font-size:1.08em;line-height:normal}
/* Preserve the UA's block math layout; plain display:block breaks the inferred row. */
.content math[display="block"]{max-width:100%;overflow-x:auto;padding:12px 4px;margin:1.2em 0;overflow-wrap:normal}
.content sub,.content sup{font-size:.75em;line-height:0;position:relative;vertical-align:baseline}
.content sub{bottom:-.25em}.content sup{top:-.5em}
.content hr{border:0;height:1px;background:var(--line);margin:2em 0}
.end-mark{display:flex;align-items:center;gap:16px;margin:48px 0 28px;color:var(--gold);font:15px/1 var(--serif);letter-spacing:.5em}
.end-mark::before,.end-mark::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,transparent,var(--gold),transparent)}
.post .qr-card{max-width:460px;margin:0 auto}
.prevnext{max-width:760px;margin:36px auto 10px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.prevnext a{display:block;min-width:0;white-space:normal;overflow-wrap:anywhere;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);font:600 15px/1.55 var(--serif)}
.prevnext a:hover{border-color:#c8d3f0;text-decoration:none}
.prevnext small{display:block;font:12px/1.4 var(--sans);color:var(--muted);margin-bottom:4px}
.prevnext .r{text-align:right}

/* 分页与归档 */
.pager{display:flex;justify-content:space-between;align-items:center;margin:30px 0;font-size:15px}
.year h2{font:700 22px/1 var(--serif);margin:34px 0 10px;display:flex;align-items:baseline;gap:10px}
.count{font:13px var(--sans);color:var(--muted)}
.year ul{list-style:none;padding:0;margin:0;max-width:820px}
.year li{display:flex;gap:18px;padding:9px 0;border-bottom:1px dashed var(--line);line-height:1.6}
.year li time{font:13px/1.9 var(--mono);color:var(--gold);flex:none}
.year li a{color:var(--ink)}
.year li a:hover{color:var(--blue)}

/* 页脚 */
.site-footer{margin-top:60px;border-top:1px solid var(--line);background:#fff}
.foot{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:28px 20px}
.sutra-foot{font:16px/1.8 var(--serif);letter-spacing:.2em;color:var(--ink-2);margin:0 0 6px}
.foot .muted{font-size:13px;margin:0}
.foot-qr{width:88px;height:88px;border-radius:6px;border:1px solid var(--line);flex:none}

/* 窄屏 */
@media (max-width:980px){
  .hero .hero-grid{grid-template-columns:1fr;gap:28px;padding:36px 16px 40px}
  .sutra-vertical{writing-mode:horizontal-tb;border-right:0;border-left:0;border-top:1px solid var(--gold);padding:14px 0 0;letter-spacing:.15em;font-size:15px}
  .sutra-vertical span{display:inline;margin:0 0 0 .6em}
  .layout{grid-template-columns:1fr;gap:28px}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .bar{height:54px}
  .brand-title{white-space:nowrap}
  nav a{padding:6px 7px;font-size:14px}
  .hero h1{font-size:44px}
  .subtitle{font-size:17px;letter-spacing:.2em}
  .post{padding-top:28px}
  .post-title{font-size:25px}
  .content{font-size:16.5px}
  .prevnext{grid-template-columns:1fr}
  .prevnext .r{text-align:left}
  .foot{flex-direction:column;align-items:flex-start}
}