/*
Theme Name: 针道 Zhenjiu
Author: 针道
Description: 面向中医针灸研习者的专业 WordPress 主题。以宣纸、水墨、朱砂为视觉基调，内置「经典文献」「针刺」「艾灸」三大内容板块，并附经络穴位图谱、条文背诵卡片、学习笔记与配穴方案库。
Version: 1.0.0
Requires at least: 6.2
Tested up to: 7.1
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: zhenjiu
Tags: education, blog, custom-menu, featured-images, translation-ready
*/

/* ============================================================
   1. 设计变量
   ============================================================ */
:root {
  --paper:       #f6efe3;
  --paper-2:     #fbf7f0;
  --paper-3:     #efe5d5;
  --ink:         #1f1b17;
  --ink-2:       #3c362f;
  --ink-3:       #6d655a;
  --ink-4:       #9a9188;

  --cinnabar:    #9e3b2c;
  --cinnabar-lt: #c05a45;
  --cinnabar-bg: #f8ebe6;
  --dai:         #3f5f57;
  --dai-bg:      #e8efec;
  --zhe:         #8a6a45;
  --zhe-bg:      #f5ece0;
  --gold:        #a8863f;

  --line:        #ded2bd;
  --line-2:      #cbbb9f;

  --nav-h:       68px;
  --max-w:       1240px;
  --radius:      4px;
  --radius-lg:   8px;

  --shadow-sm:   0 1px 3px rgba(60,45,30,.07);
  --shadow:      0 4px 18px rgba(60,45,30,.10);
  --shadow-lg:   0 14px 44px rgba(60,45,30,.16);

  --font-serif: "Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun","FangSong",serif;
  --font-sans:  "PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;

  --ease: cubic-bezier(.4,0,.2,1);
}

/* ============================================================
   2. Reset / Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-2);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 16% 18%, rgba(180,160,130,.07) 0, transparent 40%),
    radial-gradient(circle at 82% 62%, rgba(160,150,130,.06) 0, transparent 44%),
    radial-gradient(circle at 42% 92%, rgba(170,150,120,.05) 0, transparent 38%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.admin-bar .nav { top: 32px; }
@media screen and (max-width: 782px) { body.admin-bar .nav { top: 46px; } }

h1,h2,h3,h4,h5,h6 { margin: 0; font-weight: 600; color: var(--ink); line-height: 1.5; letter-spacing: .02em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.4em; }
li { margin-bottom: .3em; }
a { color: var(--cinnabar); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--cinnabar-lt); }
button { font-family: inherit; cursor: pointer; }
img, svg, video { max-width: 100%; height: auto; }
figure { margin: 0 0 1.4em; }
::selection { background: rgba(158,59,44,.18); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper-3); }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 5px; border: 2px solid var(--paper-3); }
::-webkit-scrollbar-thumb:hover { background: var(--ink-4); }

.screen-reader-text {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(1px,1px,1px,1px); white-space: nowrap;
}

/* ============================================================
   3. 顶部导航
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  height: var(--nav-h);
  display: flex; align-items: center; gap: 22px;
  padding: 0 max(24px, calc((100vw - var(--max-w)) / 2));
  background: rgba(251,247,240,.93);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.nav__brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.nav__seal {
  width: 40px; height: 40px; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--cinnabar); color: #fff;
  font-size: 20px; font-weight: 700; line-height: 1;
  border-radius: 5px;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.34);
  transition: transform .5s var(--ease);
}
.nav__brand:hover .nav__seal { transform: rotate(-6deg) scale(1.04); }
.nav__title { font-size: 19px; letter-spacing: 4px; color: var(--ink); line-height: 1.2; }
.nav__sub { display: block; font-size: 10.5px; letter-spacing: 2px; color: var(--ink-4); line-height: 1.4; font-family: var(--font-sans); }

.nav__menu { display: flex; align-items: center; gap: 2px; margin-left: auto; list-style: none; padding: 0; }
.nav__menu > li { margin: 0; position: relative; }
.nav__menu > li > a {
  display: block; padding: 8px 14px;
  font-size: 15px; color: var(--ink-2); letter-spacing: 1.5px;
  border-radius: var(--radius);
  transition: all .2s var(--ease);
  white-space: nowrap;
}
.nav__menu > li > a:hover { color: var(--cinnabar); background: var(--cinnabar-bg); }
.nav__menu > li.current-menu-item > a,
.nav__menu > li.current-menu-parent > a,
.nav__menu > li.is-active > a { color: #fff; background: var(--cinnabar); }

/* 下拉子菜单 */
.nav__menu .sub-menu {
  position: absolute; top: calc(100% + 8px); left: 0;
  min-width: 190px; padding: 8px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  list-style: none; margin: 0;
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: all .22s var(--ease);
}
.nav__menu li:hover > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav__menu .sub-menu a { display: block; padding: 7px 12px; font-size: 14px; border-radius: var(--radius); color: var(--ink-2); letter-spacing: 1px; }
.nav__menu .sub-menu a:hover { background: var(--cinnabar-bg); color: var(--cinnabar); }

.nav__search { position: relative; flex-shrink: 0; width: 190px; transition: width .3s var(--ease); }
.nav__search:focus-within { width: 240px; }
.nav__search input {
  width: 100%; height: 36px;
  padding: 0 12px 0 34px;
  font-family: var(--font-serif); font-size: 14px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px; outline: none;
  transition: all .2s var(--ease);
}
.nav__search input::placeholder { color: var(--ink-4); }
.nav__search input:focus { border-color: var(--cinnabar); background: #fff; box-shadow: 0 0 0 3px rgba(158,59,44,.10); }
.nav__search-icon {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  width: 15px; height: 15px; color: var(--ink-4); pointer-events: none;
}

.nav__toggle {
  display: none; width: 40px; height: 40px;
  background: none; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0; place-items: center;
}
.nav__toggle span { display: block; width: 18px; height: 1.6px; background: var(--ink-2); margin: 4px auto; transition: .25s; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(5.6px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-5.6px) rotate(-45deg); }

/* ============================================================
   4. 布局
   ============================================================ */
.site { padding-top: var(--nav-h); min-height: 100vh; display: flex; flex-direction: column; }
.layout {
  display: flex; align-items: flex-start;
  width: 100%; max-width: var(--max-w);
  margin: 0 auto; flex: 1;
}
.layout--full { display: block; max-width: none; }
.side {
  width: 262px; flex-shrink: 0;
  position: sticky; top: var(--nav-h);
  max-height: calc(100vh - var(--nav-h));
  overflow-y: auto;
  padding: 28px 18px 60px 24px;
  border-right: 1px solid var(--line);
}
.side__head {
  font-size: 11.5px; letter-spacing: 2.5px; color: var(--ink-4);
  margin: 0 0 10px; font-family: var(--font-sans); font-weight: 600;
}
.side__group { margin-bottom: 24px; }
.side__menu { list-style: none; margin: 0; padding: 0; }
.side__menu li { margin: 0; }
.side__menu a {
  display: block; padding: 7px 12px;
  font-size: 14.5px; color: var(--ink-2);
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: all .18s var(--ease); line-height: 1.6;
}
.side__menu a:hover { color: var(--cinnabar); background: var(--cinnabar-bg); border-left-color: var(--cinnabar-lt); }
.side__menu .current-menu-item > a,
.side__menu .current_page_item > a { color: var(--cinnabar); border-left-color: var(--cinnabar); background: var(--cinnabar-bg); font-weight: 600; }
.side__menu .sub-menu { list-style: none; padding-left: 10px; margin: 2px 0 4px; }
.side__menu .sub-menu a { font-size: 13.5px; color: var(--ink-3); padding: 5px 12px; }

.main { flex: 1; min-width: 0; padding: 36px 40px 96px; }
.main--wide { padding: 36px 40px 96px; max-width: var(--max-w); margin: 0 auto; width: 100%; }

/* ============================================================
   5. 首页
   ============================================================ */
.hero {
  position: relative;
  padding: 78px 24px 86px;
  text-align: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(158,59,44,.055) 0, transparent 62%),
    linear-gradient(180deg, var(--paper-2) 0%, var(--paper) 100%);
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%;
  border: 1px solid rgba(158,59,44,.09);
  pointer-events: none;
}
.hero::before { width: 560px; height: 560px; top: -280px; left: 50%; transform: translateX(-50%); }
.hero::after  { width: 760px; height: 760px; top: -370px; left: 50%; transform: translateX(-50%); border-color: rgba(158,59,44,.055); }
.hero__inner { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; }
.hero__kicker {
  display: inline-block; font-size: 12px; letter-spacing: 5px;
  color: var(--cinnabar); margin-bottom: 22px; font-family: var(--font-sans);
}
.hero h1 {
  font-size: clamp(34px, 5.2vw, 54px);
  letter-spacing: .18em; line-height: 1.4;
  margin-bottom: 8px; text-indent: .18em;
}
.hero__latin {
  font-family: var(--font-sans); font-size: 12px; letter-spacing: 4px;
  color: var(--ink-4); text-transform: uppercase; margin-bottom: 26px;
}
.hero__lead {
  font-size: 16.5px; color: var(--ink-3); line-height: 2.05;
  max-width: 640px; margin: 0 auto 8px;
}
.hero__divider {
  display: flex; align-items: center; justify-content: center; gap: 14px;
  margin: 28px auto; max-width: 320px; color: var(--line-2);
}
.hero__divider::before, .hero__divider::after {
  content: ""; flex: 1; height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-2), transparent);
}
.hero__seal {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border: 1.5px solid var(--cinnabar); color: var(--cinnabar);
  font-size: 15px; font-weight: 700; letter-spacing: 1px; line-height: 1.15;
  border-radius: 3px; transform: rotate(-3deg);
  background: rgba(158,59,44,.03);
  text-align: center;
}

/* 三大板块入口 */
.pillars {
  width: 100%; max-width: var(--max-w); margin: -46px auto 0; padding: 0 24px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
  position: relative; z-index: 2;
}
.pillar {
  display: flex; flex-direction: column;
  padding: 30px 26px 26px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all .3s var(--ease);
  position: relative; overflow: hidden;
}
.pillar::after {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: var(--cinnabar); transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.pillar:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--line-2); }
.pillar:hover::after { transform: scaleX(1); }
.pillar__num {
  font-family: var(--font-sans); font-size: 11.5px; letter-spacing: 2.5px;
  color: var(--cinnabar); margin-bottom: 14px; font-weight: 600;
}
.pillar__title { font-size: 22px; letter-spacing: .08em; margin-bottom: 10px; }
.pillar__desc { font-size: 14.2px; color: var(--ink-3); line-height: 1.85; margin-bottom: 18px; flex: 1; }
.pillar__more { font-size: 13.5px; color: var(--cinnabar); letter-spacing: 1px; display: inline-flex; align-items: center; gap: 6px; }
.pillar:hover .pillar__more { gap: 10px; }
.pillar__arrow { transition: transform .3s var(--ease); }

/* 首页通用区块 */
/* .site 为纵向 flex 容器；带 auto 外边距的子项会退化为收缩宽度，
   故显式声明 width:100%，否则板块宽度会塌成内容宽。 */
.home-sec { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 66px 24px 0; }
/* 首页板块固定三列：与每个板块展示的 3 条最新内容一一对应 */
.home-sec .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.home-sec__head { display: flex; align-items: flex-end; gap: 16px; margin-bottom: 30px; }
.home-sec__title { font-size: 25px; letter-spacing: .1em; }
.home-sec__sub { font-size: 13px; color: var(--ink-4); letter-spacing: 1.5px; font-family: var(--font-sans); padding-bottom: 5px; }
.home-sec__line { flex: 1; height: 1px; background: var(--line); margin-bottom: 12px; }
.home-sec__more { font-size: 13px; letter-spacing: 1px; padding-bottom: 4px; white-space: nowrap; }

/* 分类导航卡 */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 16px; }
.tile {
  display: block; padding: 22px 20px;
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); transition: all .25s var(--ease);
}
.tile:hover { border-color: var(--cinnabar); background: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.tile__name { font-size: 17px; color: var(--ink); letter-spacing: .06em; margin-bottom: 6px; }
.tile__meta { font-size: 12.5px; color: var(--ink-4); font-family: var(--font-sans); }
.tile__count { color: var(--cinnabar); }

/* ============================================================
   6. 页脚
   ============================================================ */
.footer {
  margin-top: 80px;
  border-top: 1px solid var(--line);
  background: var(--paper-3);
}
.footer__inner {
  width: 100%; max-width: var(--max-w); margin: 0 auto;
  padding: 54px 24px 26px;
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px;
}
.footer__brand { display: flex; align-items: center; gap: 11px; margin-bottom: 14px; }
.footer__desc { font-size: 13.5px; color: var(--ink-3); line-height: 1.9; max-width: 330px; margin: 0; }
.footer__head { font-size: 13.5px; color: var(--ink); letter-spacing: 2px; margin-bottom: 14px; font-weight: 600; }
.footer__links { list-style: none; margin: 0; padding: 0; }
.footer__links li { margin-bottom: 9px; }
.footer__links a { font-size: 13.5px; color: var(--ink-3); }
.footer__links a:hover { color: var(--cinnabar); }
.footer__bottom {
  border-top: 1px solid var(--line);
  padding: 18px 24px;
  text-align: center;
  font-size: 12.5px; color: var(--ink-4);
  font-family: var(--font-sans);
}
.footer__disclaimer {
  width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px 22px;
  font-size: 12px; color: var(--ink-4); line-height: 1.8; text-align: center;
}

/* ============================================================
   双语
   ============================================================ */

/* 语言切换器：贴在检索框左侧，不参与菜单的自动外边距 */
.lang-switch {
  display: flex; align-items: center; gap: 2px;
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .06em;
  white-space: nowrap;
}
.lang-switch__item {
  padding: 4px 6px;
  color: var(--ink-4);
  border-radius: var(--radius);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.lang-switch__item:hover { color: var(--ink); background: var(--paper-3); }
.lang-switch__item.is-active { color: var(--cinnabar); font-weight: 700; }
.lang-switch__sep { color: var(--line-2); font-size: 11px; }

/* 英文界面换用西文衬线，中文字体栈里的宋体对拉丁字母偏窄 */
body.lang-en {
  --font-serif: "Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Source Han Serif SC","Noto Serif SC",serif;
}

/* 中文排版靠字距拉开气韵，英文若沿用会散架，逐处收紧 */
.lang-en .nav__title { letter-spacing: .04em; }
.lang-en .nav__sub { letter-spacing: 1.2px; }
.lang-en .nav__menu > li > a { letter-spacing: .02em; }
.lang-en .hero h1 { font-size: 54px; letter-spacing: .01em; text-indent: 0; line-height: 1.1; }
.lang-en .hero__kicker { letter-spacing: .24em; font-size: 10.5px; }
.lang-en .hero__lead { font-size: 16px; line-height: 1.8; max-width: 660px; }
.lang-en .footer__head { letter-spacing: .04em; }
.lang-en .footer__desc { max-width: 380px; }

@media (max-width: 1080px) {
  .lang-switch { font-size: 11.5px; }
  .lang-en .hero h1 { font-size: 40px; }
}
@media (max-width: 720px) {
  .lang-switch { gap: 0; }
  .lang-switch__item { padding: 4px 4px; }
  .lang-en .hero h1 { font-size: 32px; }
}