:root{
  --ink:#0f1115; --ink-2:#171a21; --ink-3:#232733;
  --amber:#d9a441; --amber-2:#f0c46a; --amber-dim:#8a6a2a;
  --paper:#faf8f4; --paper-2:#f2eee6; --line:#e3ddd1; --line-dark:#2c313d;
  --tx:#1a1d24; --tx-2:#5f6675; --tx-inv:#e8e4dc;
  --r:14px; --maxw:1180px;
}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--tx);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,sans-serif;
  font-size:15.5px;line-height:1.85;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:60;background:rgba(15,17,21,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line-dark)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:baseline;gap:9px;color:var(--amber);font-size:18px;font-weight:800;letter-spacing:.5px}
.brand span{font-size:10.5px;color:var(--tx-2);letter-spacing:2.4px;font-weight:500;text-transform:uppercase}
.topnav{display:flex;gap:26px;list-style:none;margin:0 0 0 auto;padding:0}
.topnav a{color:#b9bfcc;font-size:14px;padding:4px 0;border-bottom:2px solid transparent;transition:.18s}
.topnav a:hover,.topnav a.on{color:var(--amber-2);border-color:var(--amber)}
@media(max-width:860px){.topnav{display:none}.btn-ai{margin-left:auto}}

/* 首屏 */
.hero{background:linear-gradient(150deg,#0f1115 0%,#191d26 55%,#232733 100%);color:var(--tx-inv);
  padding:74px 0 78px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-70px;top:-70px;width:340px;height:340px;
  border-radius:50%;background:radial-gradient(circle,rgba(217,164,65,.16),transparent 68%)}
.hero .wrap{display:grid;grid-template-columns:1.18fr .82fr;gap:48px;align-items:center;position:relative;z-index:2}
@media(max-width:900px){.hero .wrap{grid-template-columns:1fr;gap:34px}}
.eyebrow{font-size:11px;letter-spacing:3.2px;color:var(--amber);text-transform:uppercase;margin-bottom:16px;font-weight:600}
.hero h1{font-size:clamp(30px,4.4vw,46px);line-height:1.24;margin:0 0 18px;font-weight:800;letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:var(--amber-2)}
.hero p{color:#b9bfcc;font-size:15.5px;line-height:1.95;margin:0 0 26px;max-width:44em}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:9px;font-size:14.5px;font-weight:600;transition:.18s}
.btn-a{background:var(--amber);color:#1a1508}
.btn-a:hover{background:var(--amber-2)}
.btn-b{border:1px solid #3a4050;color:var(--tx-inv)}
.btn-b:hover{border-color:var(--amber);color:var(--amber-2)}
.entry{background:rgba(255,255,255,.045);border:1px solid #2d323e;border-radius:var(--r);padding:8px}
.entry a{display:flex;gap:14px;align-items:flex-start;padding:15px 16px;border-radius:10px;transition:.18s}
.entry a:hover{background:rgba(217,164,65,.09)}
.entry .no{color:var(--amber);font-size:13px;font-weight:800;font-variant-numeric:tabular-nums;padding-top:2px;min-width:22px}
.entry b{display:block;font-size:14.5px;color:var(--tx-inv);font-weight:600;margin-bottom:2px}
.entry small{color:#868d9c;font-size:12.5px;line-height:1.6}

/* 通用分区 */
.sec{padding:64px 0}
.sec.alt{background:var(--paper-2)}
.sec-head{margin-bottom:34px}
.sec-head .eyebrow{color:var(--amber-dim)}
.sec-head h2{font-size:clamp(21px,2.7vw,27px);margin:0 0 8px;font-weight:800;letter-spacing:-.3px;
  padding-left:14px;border-left:4px solid var(--amber)}
.sec-head p{color:var(--tx-2);margin:0;font-size:14.5px;padding-left:18px}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:900px){.grid-2,.grid-3{grid-template-columns:1fr}}
.box{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.box-h{background:var(--ink);color:var(--amber-2);font-size:14px;font-weight:700;padding:12px 20px;
  display:flex;align-items:center;gap:8px}
.box-b{padding:20px 22px 24px}
.box-b p{margin:0 0 12px}
.box-b p:last-child{margin-bottom:0}
.rank{list-style:none;counter-reset:r;margin:0;padding:0}
.rank li{counter-increment:r;display:flex;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.rank li:last-child{border:0}
.rank li::before{content:counter(r);color:var(--amber-dim);font-weight:800;font-size:12.5px;
  min-width:20px;text-align:right;font-variant-numeric:tabular-nums;padding-top:3px}
.rank b{color:var(--tx);margin-right:.5em}
.rank span{color:var(--tx-2);font-size:14px}
.flow{list-style:none;margin:0;padding:0}
.flow li{padding:9px 0 9px 20px;border-left:2px solid var(--line);position:relative;font-size:14.5px}
.flow li::before{content:"";position:absolute;left:-5px;top:17px;width:8px;height:8px;border-radius:50%;
  background:var(--amber);border:2px solid #fff}
.flow li:last-child{border-left-color:transparent}
.flow b{color:var(--tx);margin-right:.5em}
.note{margin:16px 0 0;padding:13px 16px;background:var(--paper-2);border-radius:9px;
  font-size:14px;color:var(--tx-2);line-height:1.8}

.tile{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px 24px 26px;transition:.2s}
.tile:hover{border-color:var(--amber);box-shadow:0 6px 22px rgba(20,16,6,.07);transform:translateY(-2px)}
.tile .ico{width:38px;height:38px;border-radius:10px;background:var(--paper-2);display:flex;
  align-items:center;justify-content:center;font-size:19px;margin-bottom:14px}
.tile h3{margin:0 0 9px;font-size:16px;font-weight:700}
.tile p{margin:0;color:var(--tx-2);font-size:14.3px;line-height:1.85}

details.qa{background:#fff;border:1px solid var(--line);border-radius:11px;margin-bottom:11px;overflow:hidden}
details.qa summary{padding:15px 20px;cursor:pointer;font-weight:600;font-size:15px;list-style:none;
  display:flex;justify-content:space-between;gap:14px;align-items:center}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{content:"+";color:var(--amber-dim);font-size:19px;font-weight:400;flex:none}
details.qa[open] summary::after{content:"−"}
details.qa[open] summary{background:var(--paper-2)}
details.qa .a{padding:15px 20px 19px;color:var(--tx-2);font-size:14.4px;line-height:1.9;border-top:1px solid var(--line)}

.cta{background:var(--ink);color:var(--tx-inv);padding:56px 0;text-align:center}
.cta h2{font-size:clamp(20px,2.6vw,26px);margin:0 0 12px;font-weight:800}
.cta h2 em{font-style:normal;color:var(--amber-2)}
.cta p{color:#9aa1b0;margin:0 auto 24px;max-width:38em;font-size:14.8px}

.foot{background:var(--ink-2);color:#9aa1b0;padding:44px 0 0;font-size:14px;border-top:1px solid var(--line-dark)}
.foot .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:32px}
@media(max-width:900px){.foot .cols{grid-template-columns:1fr 1fr}}
.foot h4{color:var(--tx-inv);font-size:14.5px;margin:0 0 14px;font-weight:700}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin-bottom:9px}
.foot a:hover{color:var(--amber-2)}
.foot .brand{margin-bottom:12px}
.foot .bot{border-top:1px solid var(--line-dark);padding:18px 0;text-align:center;font-size:13px;color:#6d7484}

/* ═══════════ 内页：面包屑 / 文章 / 归档 ═══════════ */
.crumb{font-size:13px;color:var(--tx-2);padding:22px 0 0}
.crumb a:hover{color:var(--amber-dim)}
.crumb i{font-style:normal;margin:0 7px;color:var(--line)}

.page-hd{background:linear-gradient(150deg,#0f1115,#1c212b);color:var(--tx-inv);padding:44px 0 46px;margin-bottom:0}
.page-hd .eyebrow{color:var(--amber)}
.page-hd h1{font-size:clamp(23px,3.2vw,34px);line-height:1.35;margin:0;font-weight:800;letter-spacing:-.4px}
.page-hd .meta{margin-top:14px;color:#8b92a1;font-size:13.5px;display:flex;gap:18px;flex-wrap:wrap}
.page-hd .meta span{display:inline-flex;align-items:center;gap:6px}
.page-hd .tag{display:inline-block;background:rgba(217,164,65,.14);color:var(--amber-2);
  border:1px solid rgba(217,164,65,.3);border-radius:5px;padding:2px 10px;font-size:12.5px}

.shell{display:grid;grid-template-columns:minmax(0,1fr) 268px;gap:44px;
  max-width:var(--maxw);margin:0 auto;padding:38px 26px 60px;align-items:start}
@media(max-width:960px){.shell{grid-template-columns:1fr;gap:34px}}

.post{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:34px 40px 40px;min-width:0}
@media(max-width:640px){.post{padding:24px 20px 30px}}
.post .cover{margin:-6px 0 26px;border-radius:10px;overflow:hidden;background:var(--paper-2)}
.post .cover img{width:100%;height:auto;display:block}
.post-body{font-size:15.8px;line-height:1.95;color:#23262e}
.post-body>*:first-child{margin-top:0}
.post-body p{margin:0 0 17px}
.post-body h2{font-size:20px;font-weight:800;margin:34px 0 14px;padding-left:13px;
  border-left:4px solid var(--amber);letter-spacing:-.2px;line-height:1.45}
.post-body h3{font-size:17px;font-weight:700;margin:26px 0 11px;color:#2b3038}
.post-body h4{font-size:15.5px;font-weight:700;margin:20px 0 9px;color:var(--tx-2)}
.post-body ul,.post-body ol{margin:0 0 17px;padding-left:1.5em}
.post-body li{margin-bottom:7px}
.post-body img{max-width:100%;height:auto;border-radius:9px;display:block;margin:22px auto}
.post-body figure{margin:22px 0}
.post-body figcaption{text-align:center;font-size:13px;color:var(--tx-2);margin-top:9px}
.post-body blockquote{margin:22px 0;padding:16px 20px;background:var(--paper-2);
  border-left:3px solid var(--amber);border-radius:0 9px 9px 0;color:var(--tx-2);font-size:15px}
.post-body blockquote p:last-child{margin-bottom:0}
.post-body a{color:var(--amber-dim);border-bottom:1px solid rgba(138,106,42,.34)}
.post-body a:hover{color:#6b5220;border-color:#6b5220}
.post-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px}
.post-body th,.post-body td{border:1px solid var(--line);padding:9px 13px;text-align:left}
.post-body th{background:var(--paper-2);font-weight:700}
.post-body code{background:var(--paper-2);padding:2px 6px;border-radius:4px;font-size:14px}
.post-body hr{border:0;border-top:1px solid var(--line);margin:30px 0}

.side{position:sticky;top:82px;display:flex;flex-direction:column;gap:18px}
@media(max-width:960px){.side{position:static}}
.side .box-b{font-size:14px}
.side .list{list-style:none;margin:0;padding:0}
.side .list li{padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px;line-height:1.6}
.side .list li:last-child{border:0}
.side .list a:hover{color:var(--amber-dim)}
.side .cats{display:flex;flex-wrap:wrap;gap:8px}
.side .cats a{background:var(--paper-2);border:1px solid var(--line);border-radius:20px;
  padding:5px 13px;font-size:13px;color:var(--tx-2);transition:.16s}
.side .cats a:hover{background:var(--ink);color:var(--amber-2);border-color:var(--ink)}
.side-cta{background:var(--ink);color:var(--tx-inv);border-radius:var(--r);padding:22px}
.side-cta b{display:block;color:var(--amber-2);font-size:15.5px;margin-bottom:8px}
.side-cta p{margin:0 0 14px;font-size:13.6px;color:#9aa1b0;line-height:1.8}
.side-cta .btn{padding:9px 18px;font-size:13.5px}

.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
@media(max-width:640px){.post-nav{grid-template-columns:1fr}}
.post-nav a{background:#fff;border:1px solid var(--line);border-radius:11px;padding:15px 18px;transition:.18s}
.post-nav a:hover{border-color:var(--amber)}
.post-nav small{color:var(--tx-2);font-size:12.5px;display:block;margin-bottom:5px}
.post-nav b{font-size:14.5px;font-weight:600;line-height:1.6;display:block}

.arch-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:960px){.arch-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.arch-grid{grid-template-columns:1fr}}
.arch-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  display:flex;flex-direction:column;transition:.2s}
.arch-card:hover{border-color:var(--amber);box-shadow:0 8px 24px rgba(20,16,6,.08);transform:translateY(-3px)}
.arch-card .thumb{aspect-ratio:16/9;background:var(--paper-2);overflow:hidden}
.arch-card .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.arch-card .in{padding:17px 19px 20px;display:flex;flex-direction:column;flex:1}
.arch-card .cat{font-size:11.5px;color:var(--amber-dim);letter-spacing:1px;margin-bottom:8px;font-weight:600}
.arch-card h3{font-size:15.6px;font-weight:700;line-height:1.6;margin:0 0 9px}
.arch-card p{font-size:13.8px;color:var(--tx-2);line-height:1.8;margin:0 0 13px;flex:1}
.arch-card time{font-size:12.5px;color:#9aa0ab}

.pager{display:flex;justify-content:center;gap:9px;margin-top:34px;flex-wrap:wrap}
.pager a,.pager span{min-width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:9px;background:#fff;font-size:14px;padding:0 12px}
.pager .current{background:var(--ink);color:var(--amber-2);border-color:var(--ink)}
.pager a:hover{border-color:var(--amber);color:var(--amber-dim)}
.empty{text-align:center;padding:70px 20px;color:var(--tx-2)}


/* ── 2026-08-12 补图：首页主图带（中上部位）+ 正文中图 ── */
.leadfig{background:var(--paper-2);border-bottom:1px solid var(--line);padding:34px 0}
.leadfig figure{margin:0 auto;max-width:800px;padding:0 26px}
.leadfig img{width:100%;height:auto;display:block;border-radius:var(--r);border:1px solid var(--line)}
.leadfig figcaption{margin-top:13px;text-align:center;font-size:13.6px;line-height:1.85;color:var(--tx-2)}
.leadfig figcaption b{color:var(--tx);font-weight:700}

.midfig{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:28px;align-items:center;margin-top:28px}
.midfig > *{min-width:0}
.midfig.rev > figure{order:2}
.midfig figure{margin:0}
.midfig img{width:100%;height:auto;display:block;border-radius:12px;border:1px solid var(--line)}
.midfig .cap h4{margin:0 0 9px;font-size:16.5px;font-weight:800;color:var(--tx)}
.midfig .cap p{margin:0 0 9px;font-size:14.6px;line-height:1.95;color:var(--tx-2)}
.midfig .cap p:last-child{margin-bottom:0}
.midfig .cap b{color:var(--amber-dim);font-weight:700}
@media(max-width:900px){.midfig{grid-template-columns:1fr;gap:16px}.midfig.rev > figure{order:0}}

/* ── 2026-08-13 顶栏「AI 辅助」按钮 ──
   刻意不放进 .topnav：该导航在 860px 以下整体 display:none，
   放进去手机端就没了。做成 .wrap 的独立子元素，两端布局照常成立。 */
.topbar .wrap{gap:18px}
.btn-ai{display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;
  background:var(--amber);color:#1a1508;font-size:13.5px;font-weight:800;letter-spacing:.3px;
  padding:8px 17px;border-radius:7px;white-space:nowrap;transition:.18s}
.btn-ai::before{content:"\2726";font-size:12px;line-height:1}
.btn-ai:hover{background:var(--amber-2);transform:translateY(-1px)}
@media(max-width:420px){.btn-ai{font-size:12.6px;padding:7px 13px}
  .brand span{display:none}}

/* ── 2026-08-13 页脚：备案号与免责说明 ── */
.foot .bot p{margin:0}
.foot .bot p + p{margin-top:8px}
.foot .bot .icp{color:var(--tx-2);font-size:12.8px;letter-spacing:.2px}

.cta-top{display:inline-flex;align-items:center;gap:.38em;
 padding:.5em 1.15em;border:1.5px solid currentColor;border-radius:999px;
 font-size:.85rem;font-weight:700;line-height:1.15;white-space:nowrap;
 text-decoration:none;color:var(--amber-2);opacity:.92;transition:opacity .2s,transform .2s}
.cta-top:hover{opacity:1;transform:translateY(-1px)}
.cta-top .dot{width:.42em;height:.42em;border-radius:50%;background:currentColor;
 display:inline-block;flex:none}
@media(max-width:820px){.cta-top{padding:.44em .9em;font-size:.8rem}}
@media(max-width:560px){.cta-top{padding:.4em .78em;font-size:.75rem;gap:.3em}
 .cta-top .dot{width:.36em;height:.36em}}
@media(max-width:380px){.cta-top{padding:.36em .66em;font-size:.72rem}}