/*
Theme Name: Zhuokeji Cosy
Description: 自研主题 — 布局复刻 Cosy 风格：固定导航 + 幻灯片杂志头 + 多规格卡片栅格
Author: 小马
Version: 1.1
*/

:root {
  --zk-accent: #2f6bff;
  --zk-ink: #1c2330;
  --zk-muted: #86909c;
  --zk-bg: #f4f5f7;
  --zk-card: #ffffff;
  --zk-radius: 12px;
  --zk-shadow: 0 2px 12px rgba(28,35,48,.06);
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--zk-bg); color: var(--zk-ink);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  padding-top: 64px; /* fixed navbar */
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* ===== 固定导航 ===== */
.zk-navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: 64px;
  background: rgba(255,255,255,.92); backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(28,35,48,.06);
}
.zk-navbar .container { display: flex; align-items: center; height: 64px; gap: 24px; }
.zk-logo { font-size: 30px; font-weight: 700; color: var(--zk-accent); letter-spacing: 1.5px; flex-shrink: 0; }
.zk-logo img { height: 34px; width: auto; }
.zk-menu { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; flex: 1; }
.zk-menu li { position: relative; }
.zk-menu a {
  display: block; padding: 10px 18px; border-radius: 8px;
  font-size: 17px; font-weight: 500; color: var(--zk-ink); transition: all .18s;
}
.zk-menu a:hover, .zk-menu .current-menu-item > a { color: var(--zk-accent); background: rgba(47,107,255,.07); }
.zk-menu .sub-menu {
  display: none; position: absolute; top: 100%; left: 0; min-width: 160px; list-style: none;
  background: #fff; border-radius: 10px; box-shadow: var(--zk-shadow); padding: 6px; margin: 0; z-index: 101;
}
.zk-menu li:hover > .sub-menu { display: block; }
.zk-nav-toggle { display: none; background: none; border: 0; font-size: 24px; cursor: pointer; }

/* ===== 幻灯片杂志头 ===== */
.zk-hero { margin-top: 16px; }
.zk-hero-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; }
.zk-slider { position: relative; border-radius: var(--zk-radius); overflow: hidden; aspect-ratio: 2/1; box-shadow: var(--zk-shadow); }
.zk-slide { position: absolute; inset: 0; opacity: 0; transition: opacity .5s; }
.zk-slide.on { opacity: 1; position: relative; }
.zk-slide img { width: 100%; height: 100%; object-fit: cover; }
.zk-slide-cap {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 40px 20px 16px; color: #fff;
  background: linear-gradient(transparent, rgba(10,14,22,.78));
}
.zk-slide-cap h2 { margin: 0; font-size: 25px; line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.zk-hero-side { display: grid; gap: 16px; grid-template-rows: 1fr 1fr; }
.zk-hero-card { position: relative; border-radius: var(--zk-radius); overflow: hidden; box-shadow: var(--zk-shadow); }
.zk-hero-card img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.zk-hero-card .zk-slide-cap h3 { margin: 0; font-size: 18px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== 区块标题 ===== */
.zk-section { margin-top: 32px; }
.zk-sec-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; }
.zk-sec-head h2 { margin: 0; font-size: 22px; position: relative; padding-left: 14px; }
.zk-sec-head h2::before { content: ""; position: absolute; left: 0; top: 3px; bottom: 3px; width: 5px; border-radius: 3px; background: var(--zk-accent); }
.zk-sec-head a { font-size: 15px; color: var(--zk-muted); }
.zk-sec-head a:hover { color: var(--zk-accent); }

/* ===== 卡片栅格 ===== */
.zk-grid { display: grid; gap: 16px; }
.zk-grid-4 { grid-template-columns: repeat(4, 1fr); }
.zk-grid-2 { grid-template-columns: repeat(2, 1fr); }
.zk-card {
  background: var(--zk-card); border-radius: var(--zk-radius); overflow: hidden;
  box-shadow: var(--zk-shadow); transition: transform .2s, box-shadow .2s; display: flex; flex-direction: column;
}
.zk-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(28,35,48,.12); }
.zk-card-media { position: relative; padding-top: 66%; overflow: hidden; } /* 3x2 */
.zk-card-media.r169 { padding-top: 56.25%; }
.zk-card-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.zk-card:hover .zk-card-media img { transform: scale(1.05); }
.zk-badge-cat {
  position: absolute; top: 10px; left: 10px; z-index: 2; padding: 5px 14px; border-radius: 20px;
  background: rgba(47,107,255,.92); color: #fff; font-size: 14px; font-weight: 500;
}
.zk-card-body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.zk-card-title { margin: 0; font-size: 17px; line-height: 1.45; font-weight: 600; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.zk-card-title a:hover { color: var(--zk-accent); }
.zk-card-meta { display: flex; align-items: center; gap: 14px; margin-top: auto; color: var(--zk-muted); font-size: 14px; }
.zk-card-meta span { display: inline-flex; align-items: center; gap: 4px; }
.zk-featured-tag { color: var(--zk-accent); font-size: 14px; font-weight: 600; }

/* ===== 列表页 / 分页 ===== */
.zk-page-head { margin: 20px 0; }
.zk-page-head h1 { font-size: 24px; margin: 0 0 4px; }
.zk-page-head p { color: var(--zk-muted); margin: 0; }
.zk-pagination { display: flex; gap: 8px; justify-content: center; margin: 32px 0; }
.zk-pagination .page-numbers {
  min-width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center;
  background: #fff; border-radius: 9px; box-shadow: var(--zk-shadow); font-size: 14px; padding: 0 10px;
}
.zk-pagination .current { background: var(--zk-accent); color: #fff; }

/* ===== 文章页 ===== */
.zk-single { background: var(--zk-card); border-radius: var(--zk-radius); box-shadow: var(--zk-shadow); padding: 32px 36px; margin-top: 20px; }
.zk-single-h1 { font-size: 28px; line-height: 1.4; margin: 8px 0 12px; }
.zk-single-meta { color: var(--zk-muted); font-size: 15px; display: flex; gap: 18px; padding-bottom: 18px; border-bottom: 1px solid #eef0f3; }
.zk-entry { font-size: 17px; line-height: 1.9; margin-top: 20px; }
.zk-entry p { margin: 0 0 1.2em; }
.zk-entry img { border-radius: 8px; margin: 8px auto; }
.zk-entry h2, .zk-entry h3 { margin: 1.4em 0 .6em; }
.zk-entry blockquote { margin: 1em 0; padding: 10px 18px; border-left: 4px solid var(--zk-accent); background: rgba(47,107,255,.05); border-radius: 0 8px 8px 0; color: #4a5568; }

/* ===== 页脚 ===== */
.zk-footer { margin-top: 48px; background: #fff; border-top: 1px solid #eef0f3; padding: 28px 0; color: var(--zk-muted); font-size: 14px; text-align: center; }
.zk-footer a:hover { color: var(--zk-accent); }

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .zk-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .zk-hero-grid { grid-template-columns: 1fr; }
  .zk-hero-side { grid-template-rows: none; grid-template-columns: 1fr 1fr; }
  .zk-hero-side .zk-hero-card { aspect-ratio: 2/1; min-height: 160px; }
}
@media (max-width: 768px) {
  .zk-nav-toggle { display: block; margin-left: auto; }
  .zk-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 8px 12px 12px; box-shadow: var(--zk-shadow); }
  .zk-menu.open { display: flex; }
  .zk-grid-2, .zk-hero-side { grid-template-columns: 1fr; }
  .zk-single { padding: 20px 18px; }
  .zk-slider { aspect-ratio: 16/9; }
  .zk-postnav { grid-template-columns: 1fr; }
  .zk-comments { padding: 18px; }
}

/* ===== 文章页补充 ===== */
.zk-single-cover { margin: 20px 0 4px; }
.zk-single-cover img { width: 100%; border-radius: 10px; }
.zk-single-tags { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 8px; }
.zk-single-tags a { font-size: 15px; color: var(--zk-muted); background: var(--zk-bg); padding: 6px 14px; border-radius: 20px; }
.zk-single-tags a:hover { color: #fff; background: var(--zk-accent); }
.zk-postnav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; }
.zk-postnav-item { background: #fff; border-radius: var(--zk-radius); box-shadow: var(--zk-shadow); padding: 14px 18px; display: flex; flex-direction: column; gap: 6px; }
.zk-postnav-item span { font-size: 13px; color: var(--zk-muted); }
.zk-postnav-item strong { font-size: 16px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.zk-postnav-item:hover strong { color: var(--zk-accent); }
.zk-comments { background: #fff; border-radius: var(--zk-radius); box-shadow: var(--zk-shadow); padding: 24px 36px; margin-top: 20px; }

/* ===== 小马修正：logo 尺寸 / 导航对齐 / 容器宽度（对齐 Cosy 演示站 1320） ===== */
.zk-navbar .container { max-width:1320px; width:100%; display:flex; align-items:center; gap:24px; height:64px; }
.zk-navbar .zk-logo { display:flex; align-items:center; height:64px; flex-shrink:0; font-size:26px; font-weight:800; color:#2f6bff; letter-spacing:1px; }
.zk-navbar .zk-logo img,
.zk-navbar .custom-logo { height:34px !important; width:auto !important; max-height:34px !important; display:block; }
@media (min-width:901px) {
  .zk-navbar .zk-menu { align-items:center; height:64px; flex-wrap:nowrap; }
  .zk-navbar .zk-menu > li { height:64px; display:flex; align-items:center; }
  .zk-navbar .zk-menu > li > a { line-height:64px; padding:0 14px; display:block; }
}
/* 固定导航不遮挡内容 */
body { padding-top:64px; }

/* ===== 小马修正2：顶栏加高（81px）+ logo 加大（49px，比导航文字大） ===== */
.zk-navbar, .zk-navbar .container, .zk-navbar .zk-logo { height:81px; }
.zk-navbar .zk-logo { font-size:30px; }
.zk-navbar .zk-logo img,
.zk-navbar .custom-logo { height:49px !important; max-height:49px !important; width:auto !important; }
body { padding-top:81px; }
@media (min-width:901px) {
  .zk-navbar .zk-menu { height:81px; }
  .zk-navbar .zk-menu > li { height:81px; }
  .zk-navbar .zk-menu > li > a { line-height:81px; font-size:16px; padding:0 16px; }
}
@media (max-width:900px) {
  .zk-menu { top:81px !important; }
  .zk-navbar .zk-logo img, .zk-navbar .custom-logo { height:40px !important; max-height:40px !important; }
}

/* ===== 小马修正3：logo 放大到 56px，网址清晰可见 ===== */
.zk-navbar .zk-logo img,
.zk-navbar .custom-logo { height:56px !important; max-height:56px !important; width:auto !important; }
@media (max-width:900px) {
  .zk-navbar .zk-logo img, .zk-navbar .custom-logo { height:44px !important; max-height:44px !important; }
}

/* ===== 3.4：站内搜索框 ===== */
.zk-nav-main { display:flex; align-items:center; gap:10px; flex:1; min-width:0; }
.zk-search {
  display:flex; align-items:center; gap:2px; height:42px; width:230px; flex-shrink:0;
  background:var(--zk-bg); border:1px solid #e6e9ee; border-radius:999px; padding:0 5px 0 16px;
  transition:border-color .18s, background .18s;
}
.zk-search:focus-within { background:#fff; border-color:var(--zk-accent); }
.zk-search input {
  flex:1; min-width:0; border:0; background:none; outline:none;
  font-size:15px; color:var(--zk-ink); font-family:inherit;
}
.zk-search input::placeholder { color:#a9b1bd; }
.zk-search button {
  border:0; background:none; cursor:pointer; color:var(--zk-muted);
  display:flex; align-items:center; justify-content:center; padding:8px; border-radius:50%; flex-shrink:0;
}
.zk-search button:hover { color:var(--zk-accent); background:rgba(47,107,255,.1); }
.zk-search-m { display:none; }

/* 404 大搜索框 */
.zk-search-lg {
  width:100%; max-width:460px; height:50px; margin:18px auto 0; padding:0 6px 0 20px;
  background:#fff; border-color:#dfe3e9; border-radius:999px;
}
.zk-search-lg input { font-size:16px; }
.zk-search-lg button {
  width:auto; padding:0 22px; height:38px; border-radius:999px;
  background:var(--zk-accent); color:#fff; font-size:15px; font-weight:600; font-family:inherit;
}
.zk-search-lg button:hover { background:#1f57e0; color:#fff; }

/* 移动端：搜索框跟着菜单一起展开 */
@media (max-width:900px) {
  .zk-search-d { display:none; }
  .zk-nav-toggle { display:block; }
  .zk-nav-main {
    display:none; position:absolute; top:81px; left:0; right:0; flex-direction:column;
    align-items:stretch; gap:6px; background:#fff; padding:8px 12px 12px; box-shadow:var(--zk-shadow);
  }
  .zk-nav-main.open { display:flex; }
  .zk-nav-main .zk-menu { display:flex; position:static; top:auto; left:auto; right:auto; background:none; box-shadow:none; padding:0; }
  .zk-search-m { display:flex; width:100%; }
}

/* ===== 3.4：404 页面 ===== */
.zk-404 { text-align:center; padding:40px 0 6px; }
.zk-404-code { font-size:82px; font-weight:800; line-height:1; color:var(--zk-accent); letter-spacing:4px; opacity:.16; }
.zk-404-title { font-size:26px; margin:6px 0 10px; }
.zk-404-desc { color:var(--zk-muted); font-size:16px; margin:0 auto; max-width:520px; line-height:1.7; }
.zk-404-back { margin:22px 0 0; }
.zk-btn {
  display:inline-block; padding:11px 26px; border-radius:999px;
  background:var(--zk-accent); color:#fff; font-size:15px; font-weight:600;
}
.zk-btn:hover { background:#1f57e0; }