/* 老域名学堂 style.css —— 杂志/博客风 v2 */
:root{
  --paper:#FAF6EF; --card:#FFFDF9; --ink:#2B2118; --muted:#7C6B57;
  --amber:#B45309; --amber-deep:#8A3F06; --line:#E7DCC6; --soft:#F3EAD7;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.8;}
h1,h2,h3,h4{font-family:"Noto Serif SC","Songti SC","STSong",Georgia,"Times New Roman",serif;
  line-height:1.4;font-weight:700;color:var(--ink);}
a{color:var(--amber);text-decoration:none}
a:hover{color:var(--amber-deep);text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* 顶栏 */
.site-header{background:var(--card);border-bottom:2px solid var(--amber);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.brand{display:flex;align-items:baseline;gap:10px;color:var(--ink)}
.brand:hover{text-decoration:none;color:var(--ink)}
.brand-name{font-family:"Noto Serif SC","Songti SC",Georgia,serif;font-size:24px;font-weight:700;letter-spacing:2px}
.brand-name .dot{color:var(--amber)}
.brand-slogan{font-size:12px;color:var(--muted);letter-spacing:1px}
.main-nav{display:flex;gap:4px}
.main-nav a{color:var(--ink);font-size:15px;padding:8px 14px;border-radius:6px}
.main-nav a:hover{background:var(--soft);text-decoration:none;color:var(--amber-deep)}

/* Hero */
.hero{background:linear-gradient(180deg,#F6EDDC 0%,var(--paper) 100%);
  border-bottom:1px solid var(--line);padding:64px 0 56px;text-align:center}
.hero-kicker{display:inline-block;font-size:13px;letter-spacing:6px;color:var(--amber);
  border:1px solid var(--amber);border-radius:999px;padding:4px 18px;margin-bottom:18px;background:#fff8}
.hero h1{font-size:52px;letter-spacing:10px;margin-bottom:8px}
.hero-sub{font-size:19px;color:var(--muted);letter-spacing:4px;margin-bottom:16px}
.hero-desc{max-width:660px;margin:0 auto;color:var(--muted);font-size:15px}

/* 新手推荐条 */
.featured-strip{max-width:1120px;margin:26px auto 0;padding:0 20px}
.featured-strip a{display:flex;align-items:center;gap:14px;background:var(--card);
  border:1px solid var(--amber);border-radius:10px;padding:16px 22px;color:var(--ink)}
.featured-strip a:hover{text-decoration:none;box-shadow:0 6px 18px rgba(180,83,9,.12)}
.featured-strip .tag{background:var(--amber);color:#fff;font-size:12px;border-radius:4px;padding:2px 10px;white-space:nowrap}
.featured-strip strong{font-size:17px}
.featured-strip .go{margin-left:auto;color:var(--amber);font-weight:700;white-space:nowrap}

/* 专题卡片 */
.hub-section{padding:44px 0 8px}
.section-title{font-size:24px;margin:6px 0 18px;padding-bottom:10px;border-bottom:2px solid var(--amber);display:inline-block}
.section-sub{color:var(--muted);font-size:14.5px;margin:-8px 0 20px}
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.topic-card{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:24px 22px;display:flex;flex-direction:column;transition:transform .15s ease,box-shadow .15s ease}
.topic-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(180,83,9,.12)}
.topic-card h3{font-size:20px;color:var(--amber-deep);margin-bottom:8px}
.topic-card>p{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:12px}
.topic-card ul{list-style:none;margin-bottom:14px;flex:1}
.topic-card li{padding:7px 0;border-top:1px dashed var(--line);font-size:14.5px}
.topic-card li::before{content:"\25B8  ";color:var(--amber)}
.topic-card li a{color:var(--ink)}
.topic-card li a:hover{color:var(--amber-deep)}
.topic-card .more{font-weight:700;font-size:15px}

/* 工具箱卡片 */
.toolbox-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px 22px;
  display:flex;flex-direction:column}
.tool-card h3{font-size:18px;color:var(--amber-deep);margin-bottom:8px}
.tool-card p{font-size:14px;color:var(--muted);line-height:1.75;flex:1;margin-bottom:14px}
.tool-card .go{display:inline-block;background:var(--amber);color:#fff;font-weight:700;
  text-align:center;border-radius:8px;padding:10px 0;font-size:15px}
.tool-card .go:hover{background:var(--amber-deep);text-decoration:none;color:#fff}

/* 文章列表 */
.post-list{list-style:none}
.post-list li{background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:20px 22px;margin-bottom:14px}
.post-list h3{font-size:19px;margin:6px 0 8px}
.post-list h3 a{color:var(--ink)}
.post-list h3 a:hover{color:var(--amber-deep)}
.post-meta{font-size:12.5px;color:var(--muted)}
.post-meta .tag{display:inline-block;background:var(--soft);color:var(--amber-deep);
  border-radius:4px;padding:1px 8px;margin-right:8px;font-size:12px}
.post-excerpt{font-size:14.5px;color:var(--muted);margin-top:6px;line-height:1.75}

/* 版式 */
.layout{display:grid;grid-template-columns:1fr 300px;gap:36px;padding:40px 0}

/* 侧边栏 */
.sidebar aside{background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:20px;margin-bottom:20px}
.sidebar h3{font-size:17px;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.sidebar ul{list-style:none}
.sidebar li{padding:7px 0;border-bottom:1px dashed var(--line);font-size:14px}
.sidebar li:last-child{border-bottom:none}
.sidebar li a{color:var(--ink)}
.sidebar li a:hover{color:var(--amber-deep)}
.sidebar .n{float:right;color:var(--muted);font-size:12.5px}
.sidebar .hot-date{display:block;font-size:12px;color:var(--muted)}

/* 文章页 */
.breadcrumb{font-size:13px;color:var(--muted);margin:26px 0 6px}
.breadcrumb a{color:var(--muted)}
.post-head h1{font-size:32px;margin:8px 0 12px;line-height:1.45}
.post-head .post-meta{margin-bottom:8px}
.author-line{font-size:13.5px;color:var(--muted);margin:10px 0 4px;padding-top:10px;
  border-top:1px dashed var(--line)}
.post-body{background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:34px 36px;margin:18px 0 26px;font-size:16.5px;line-height:1.95}
.post-body>p:first-of-type{font-size:17.5px;color:#4A3B2C;background:var(--soft);
  border-radius:8px;padding:16px 18px;margin-bottom:22px}
.post-body h2{font-size:23px;margin:34px 0 14px;padding-left:12px;border-left:4px solid var(--amber)}
.post-body h3{font-size:19px;margin:26px 0 10px;color:var(--amber-deep)}
.post-body p{margin:12px 0}
.post-body ul,.post-body ol{margin:12px 0 12px 24px}
.post-body li{margin:6px 0}
.post-body blockquote{border-left:3px solid var(--line);color:var(--muted);
  padding:6px 16px;margin:16px 0;background:#FCF9F2;border-radius:0 8px 8px 0}
.post-body strong{color:var(--amber-deep)}
.post-body hr{border:none;border-top:1px solid var(--line);margin:26px 0}
.fig{margin:22px 0;text-align:center}
.fig img{border:1px solid var(--line);border-radius:8px;background:#fff}
.fig figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.img-slot{border:2px dashed var(--amber);border-radius:10px;background:#FFFBF2;
  padding:26px 22px;margin:22px 0;text-align:center;color:var(--muted)}
.img-slot-title{font-size:16px;font-weight:700;color:var(--amber-deep);margin-bottom:6px}
.img-slot-note{font-size:12.5px;margin-top:8px}
.data-card{margin:26px 0;padding:20px 24px;border:2px solid #94a3b8;border-radius:12px;background:#f8fafc}
.data-card-title{font-weight:800;font-size:16px;margin:0 0 6px}
.data-card-meta{font-size:13.5px;color:#64748b;margin:0 0 12px}
.data-card-meta a{color:#2563eb}
.data-card-rows{display:grid;grid-template-columns:1fr 1fr;gap:4px 24px;margin:0 0 12px}
.data-card-row{display:flex;justify-content:space-between;gap:12px;border-bottom:1px dashed #e2e8f0;padding:7px 0;font-size:14.5px}
.data-card-row span{color:#475569}
.data-card-foot{font-size:13px;color:#94a3b8;margin:0}
@media(max-width:640px){.data-card-rows{grid-template-columns:1fr}}
.related{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:22px 24px;margin-bottom:26px}
.related h3{font-size:18px;margin-bottom:10px}
.related ul{list-style:none}
.related li{padding:6px 0;font-size:15px}
.related li::before{content:"\25B8 ";color:var(--amber)}

/* 工具推荐页 */
.tool-lead{background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:24px 26px;margin:20px 0;font-size:16px}
.cta{background:linear-gradient(135deg,#B45309,#8A3F06);color:#FFF7EA;border-radius:10px;
  padding:28px;text-align:center;margin:26px 0}
.cta h2{color:#fff;margin-bottom:10px}
.cta p{color:#FDEFD8;margin-bottom:16px}
.cta a.btn{display:inline-block;background:#fff;color:var(--amber-deep);font-weight:700;
  padding:12px 34px;border-radius:999px;font-size:17px}
.cta a.btn:hover{text-decoration:none;background:#FFF3DC}

/* 案例库字段规范 */
.case-spec{background:var(--card);border:1px solid var(--amber);border-radius:10px;
  padding:24px 26px;margin:0 0 24px;font-size:15px}
.case-spec h2{font-size:20px;color:var(--amber-deep);margin-bottom:12px}
.case-spec ol{margin:10px 0 10px 22px}
.case-spec li{margin:8px 0}
.case-spec li strong{color:var(--amber-deep)}
.case-spec .note{font-size:13.5px;color:var(--muted);margin-top:12px}

/* 关于页 */
.about-body{background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:34px 36px;margin:20px 0 30px;font-size:16px}
.about-body h2{font-size:22px;margin:26px 0 12px;padding-left:12px;border-left:4px solid var(--amber)}
.about-body h2:first-child{margin-top:0}
.about-body p{margin:10px 0}
.about-body ul{margin:10px 0 10px 22px}
.about-body li{margin:6px 0}

/* 页脚 */
.site-footer{background:#241A10;color:#CBB99E;margin-top:20px}
.site-footer .wrap{padding-top:36px;padding-bottom:26px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;margin-bottom:22px}
.foot-grid h4{color:#F5E9D2;font-size:15px;margin-bottom:10px;font-family:serif}
.foot-grid p,.foot-grid li{font-size:13.5px;line-height:1.9}
.foot-grid ul{list-style:none}
.foot-grid a{color:#CBB99E}
.foot-grid a:hover{color:#F5E9D2}
.copyright{border-top:1px solid #3A2C1C;padding-top:16px;font-size:12.5px;color:#8F7C60;text-align:center}

/* 响应式 */
@media (max-width:900px){
  .layout{grid-template-columns:1fr}
  .topic-grid,.toolbox-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:38px;letter-spacing:6px}
  .post-body{padding:24px 20px}
  .foot-grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  .main-nav a{padding:8px 8px;font-size:14px}
  .brand-slogan{display:none}
  .topic-grid,.toolbox-grid{grid-template-columns:1fr}
  .hero{padding:44px 0 36px}
}