/*
Theme Name: PHKB Magazine
Theme URI: https://pinpophoto.com/
Author: Pinpo
Description: 全球摄影专业知识库 V1 原生区块主题。
Version: 0.1.3
Requires at least: 6.8
Requires PHP: 8.1
Text Domain: phkb-magazine
*/

:root {
  --phkb-paper: #fbfaf6;
  --phkb-paper-muted: #f4f0e7;
  --phkb-ink: #191816;
  --phkb-ink-soft: #3a3834;
  --phkb-muted: #6f6b63;
  --phkb-line: #d8d2c6;
  --phkb-accent: #9a3f2b;
  --phkb-info: #315f73;
  --phkb-warning: #8b5a23;
  --phkb-content: 720px;
  --phkb-archive: 1200px;
  --phkb-wide: 1600px;
  --phkb-edge: clamp(20px, 5.56vw, 80px);
  --phkb-serif: "Noto Serif SC", "Songti SC", "STSong", Georgia, serif;
  --phkb-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --phkb-latin: Inter, ui-sans-serif, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--phkb-ink);
  background: var(--phkb-paper);
  font-family: var(--phkb-sans);
  -webkit-font-smoothing: antialiased;
}
body.admin-bar .phkb-site-header { top: 32px; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .2em; }
button, input, select { font: inherit; }
img { max-width: 100%; height: auto; }
:focus-visible { outline: 3px solid var(--phkb-info); outline-offset: 3px; }
.screen-reader-text {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link:focus { width: auto; height: auto; clip: auto; margin: 12px; padding: 12px 16px; background: #fff; z-index: 9999; }

.phkb-site-header {
  position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--phkb-line);
  background: color-mix(in srgb, var(--phkb-paper) 94%, transparent);
  backdrop-filter: blur(14px);
}
.phkb-header-inner, .phkb-footer-inner {
  width: min(calc(100% - (2 * var(--phkb-edge))), var(--phkb-archive)); margin: 0 auto;
}
.phkb-header-inner { min-height: 88px; display: flex; align-items: center; gap: 32px; }
.phkb-brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; min-height: 48px; }
.phkb-brand img { display: block; width: 48px; height: 48px; flex: 0 0 48px; }
.phkb-brand-copy { display: grid; gap: 1px; }
.phkb-brand-copy strong { font: 600 15px/1.2 var(--phkb-latin); letter-spacing: .16em; }
.phkb-brand-copy small { color: var(--phkb-muted); font-size: 11px; letter-spacing: .08em; white-space: nowrap; }
.phkb-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.phkb-nav a { padding: 14px 13px; min-height: 48px; display: inline-flex; align-items: center; text-decoration: none; font-size: 14px; }
.phkb-nav a:hover { color: var(--phkb-accent); }
.phkb-menu-button { display: none; margin-left: auto; min-width: 48px; min-height: 48px; border: 1px solid var(--phkb-line); background: transparent; color: var(--phkb-ink); }

.phkb-main { min-height: 70vh; }
.phkb-shell { width: 100%; overflow: clip; }
.phkb-wrap { width: min(calc(100% - (2 * var(--phkb-edge))), var(--phkb-archive)); margin-inline: auto; }
.phkb-reading { width: min(calc(100% - (2 * var(--phkb-edge))), var(--phkb-content)); margin-inline: auto; }
.phkb-section { padding-block: clamp(64px, 8vw, 120px); border-bottom: 1px solid var(--phkb-line); }
.phkb-section--muted { background: var(--phkb-paper-muted); }
.phkb-kicker { margin: 0 0 18px; color: var(--phkb-accent); font-size: 12px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
.phkb-display { margin: 0; max-width: 1050px; font: 500 clamp(46px, 6.3vw, 92px)/1.04 var(--phkb-serif); letter-spacing: -.025em; }
.phkb-display--detail { font-size: clamp(44px, 5.3vw, 76px); }
.phkb-lead { margin: 28px 0 0; max-width: 760px; color: var(--phkb-ink-soft); font: 400 clamp(18px, 1.7vw, 24px)/1.65 var(--phkb-serif); }
.phkb-meta-line { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--phkb-muted); font-size: 13px; }
.phkb-rule-title { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.phkb-rule-title h2 { margin: 0; font: 500 clamp(30px, 3.2vw, 48px)/1.18 var(--phkb-serif); }
.phkb-rule-title span { color: var(--phkb-muted); font: 13px/1.4 var(--phkb-latin); letter-spacing: .08em; }

.phkb-grid { display: grid; gap: 24px; }
.phkb-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.phkb-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.phkb-card { min-width: 0; border-top: 1px solid var(--phkb-ink); padding-top: 18px; }
.phkb-card a { display: block; text-decoration: none; }
.phkb-card a:hover h3 { color: var(--phkb-accent); }
.phkb-media-placeholder { aspect-ratio: 4/3; display: grid; place-items: center; margin-bottom: 20px; border: 1px solid var(--phkb-line); background: linear-gradient(135deg, #f8f5ef, #eee8dc); color: var(--phkb-muted); text-align: center; }
.phkb-media-placeholder span { max-width: 180px; font-size: 12px; letter-spacing: .08em; line-height: 1.6; }
.phkb-card h3 { margin: 0; font: 500 25px/1.3 var(--phkb-serif); transition: color .2s ease; }
.phkb-card .phkb-latin-name { margin: 5px 0 0; color: var(--phkb-muted); font: 500 12px/1.5 var(--phkb-latin); letter-spacing: .08em; }
.phkb-card p { margin: 16px 0 0; color: var(--phkb-ink-soft); font: 15px/1.75 var(--phkb-serif); }
.phkb-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.phkb-tag { display: inline-flex; align-items: center; min-height: 28px; padding: 4px 9px; border: 1px solid var(--phkb-line); border-radius: 99px; color: var(--phkb-muted); font-size: 12px; }
.phkb-tag--member { border-color: color-mix(in srgb, var(--phkb-accent) 50%, var(--phkb-line)); color: var(--phkb-accent); }
.phkb-index-number { display: block; margin-bottom: 10px; color: var(--phkb-muted); font: 12px/1 var(--phkb-latin); }

.phkb-entry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.phkb-entry { position: relative; min-height: 360px; padding: clamp(28px, 4vw, 52px); border: 1px solid var(--phkb-line); text-decoration: none; }
.phkb-entry:hover { border-color: var(--phkb-ink); }
.phkb-entry h2 { margin: 0; max-width: 520px; font: 500 clamp(34px, 4vw, 58px)/1.12 var(--phkb-serif); }
.phkb-entry p { max-width: 520px; margin-top: 24px; color: var(--phkb-muted); font: 16px/1.75 var(--phkb-serif); }
.phkb-entry .phkb-arrow { position: absolute; right: 32px; bottom: 28px; font-size: 28px; }

.phkb-filter-bar { margin-bottom: 38px; padding: 24px; border: 1px solid var(--phkb-line); background: #fff; }
.phkb-filter-form { display: grid; grid-template-columns: minmax(220px, 2fr) repeat(3, minmax(140px, 1fr)) auto; gap: 12px; align-items: end; }
.phkb-field { display: grid; gap: 7px; }
.phkb-field label { font-size: 12px; font-weight: 600; color: var(--phkb-muted); }
.phkb-field input, .phkb-field select { width: 100%; min-height: 48px; border: 1px solid var(--phkb-line); border-radius: 0; background: var(--phkb-paper); color: var(--phkb-ink); padding: 0 13px; }
.phkb-button { min-height: 48px; padding: 11px 20px; border: 1px solid var(--phkb-ink); background: var(--phkb-ink); color: #fff; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }
.phkb-button:hover { background: var(--phkb-accent); border-color: var(--phkb-accent); }
.phkb-button--secondary { background: transparent; color: var(--phkb-ink); border-color: var(--phkb-line); }
.phkb-button--secondary:hover { color: #fff; }
.phkb-filter-toggle { display: none; width: 100%; }
.phkb-result-meta { margin: 0 0 24px; color: var(--phkb-muted); font-size: 13px; }

.phkb-facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--phkb-line); border-bottom: 1px solid var(--phkb-line); }
.phkb-fact { padding: 24px 18px 24px 0; }
.phkb-fact dt { color: var(--phkb-muted); font-size: 12px; }
.phkb-fact dd { margin: 8px 0 0; font: 17px/1.5 var(--phkb-serif); }
.phkb-article-layout { display: grid; grid-template-columns: 220px minmax(0, var(--phkb-content)); justify-content: center; gap: 64px; }
.phkb-toc { position: sticky; top: 120px; align-self: start; padding-left: 16px; border-left: 1px solid var(--phkb-line); }
.phkb-toc strong { display: block; margin-bottom: 12px; font-size: 12px; letter-spacing: .1em; }
.phkb-toc a { display: flex; min-height: 44px; align-items: center; padding: 7px 0; color: var(--phkb-muted); font-size: 13px; text-decoration: none; }
.phkb-prose { min-width: 0; }
.phkb-prose h2 { scroll-margin-top: 130px; margin: 72px 0 20px; font: 500 34px/1.3 var(--phkb-serif); }
.phkb-prose h2:first-child { margin-top: 0; }
.phkb-prose h3 { margin: 36px 0 14px; font: 500 23px/1.4 var(--phkb-serif); }
.phkb-prose p, .phkb-prose li { font: 17px/1.76 var(--phkb-serif); }
.phkb-prose p { margin: 0 0 22px; }
.phkb-prose ul, .phkb-prose ol { padding-left: 1.4em; }
.phkb-prose blockquote { margin: 36px 0; padding: 2px 0 2px 24px; border-left: 3px solid var(--phkb-accent); color: var(--phkb-ink-soft); }
.phkb-source-list { border-top: 1px solid var(--phkb-line); }
.phkb-source-row { display: grid; grid-template-columns: 1.5fr .7fr 1fr; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--phkb-line); font-size: 13px; }
.phkb-source-row a { overflow-wrap: anywhere; }

.phkb-member-gate { margin-top: 64px; padding: clamp(28px, 4vw, 52px); border: 1px solid var(--phkb-line); background: var(--phkb-paper-muted); }
.phkb-member-gate h2 { margin: 0; font: 500 clamp(28px, 3vw, 40px)/1.25 var(--phkb-serif); }
.phkb-member-gate p { max-width: 620px; color: var(--phkb-ink-soft); font: 16px/1.75 var(--phkb-serif); }
.phkb-member-gate .phkb-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.phkb-member-content { padding: 36px; border-left: 4px solid var(--phkb-accent); background: #fff; }
.phkb-rights-note { margin: 28px 0 0; padding: 16px 18px; border: 1px solid #d8c3a2; color: var(--phkb-warning); font-size: 13px; line-height: 1.65; }

.phkb-login-grid { display: grid; grid-template-columns: 1fr minmax(360px, 520px); gap: clamp(48px, 8vw, 120px); align-items: start; }
.phkb-login-card { padding: clamp(28px, 4vw, 48px); border: 1px solid var(--phkb-line); background: #fff; }
.phkb-login-card h2 { margin: 0 0 24px; font: 500 32px/1.3 var(--phkb-serif); }
.phkb-login-card .phkb-field { margin-bottom: 18px; }
.phkb-login-card .phkb-button { width: 100%; }
.phkb-form-note { margin: 18px 0 0; color: var(--phkb-muted); font-size: 13px; line-height: 1.65; }
.phkb-notice { margin-bottom: 18px; padding: 14px 16px; border-left: 3px solid var(--phkb-info); background: #edf4f6; font-size: 14px; }

.phkb-empty, .phkb-error { padding: 52px 24px; border: 1px solid var(--phkb-line); text-align: center; }
.phkb-empty h2, .phkb-error h2 { margin: 0 0 12px; font: 500 30px/1.3 var(--phkb-serif); }
.phkb-empty p, .phkb-error p { color: var(--phkb-muted); }
.phkb-skeleton { min-height: 260px; border-top: 1px solid var(--phkb-line); background: linear-gradient(90deg, var(--phkb-paper-muted) 25%, #fff 37%, var(--phkb-paper-muted) 63%); background-size: 400% 100%; animation: phkb-shimmer 1.4s ease infinite; }
@keyframes phkb-shimmer { to { background-position: -100% 0; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }

.phkb-site-footer { padding-block: 48px; background: var(--phkb-ink); color: #fff; }
.phkb-footer-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.phkb-footer-inner p { margin: 0; color: #bbb6ad; font-size: 13px; line-height: 1.7; }
.phkb-footer-inner nav { justify-self: end; display: flex; flex-wrap: wrap; gap: 18px; }
.phkb-footer-inner a { min-height: 44px; display: inline-flex; align-items: center; }

@media (max-width: 1199px) {
  :root { --phkb-edge: 40px; }
  .phkb-header-inner { min-height: 80px; }
  .phkb-nav a:nth-child(4) { display: none; }
  .phkb-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .phkb-filter-form { grid-template-columns: 2fr repeat(2, 1fr) auto; }
  .phkb-filter-form .phkb-field--region { display: none; }
  .phkb-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .phkb-article-layout { grid-template-columns: minmax(0, var(--phkb-content)); }
  .phkb-toc { position: static; display: flex; gap: 14px; overflow-x: auto; padding: 0 0 14px; border-left: 0; border-bottom: 1px solid var(--phkb-line); }
  .phkb-toc strong { display: none; }
  .phkb-toc a { flex: 0 0 auto; }
}

@media (max-width: 767px) {
  :root { --phkb-edge: 20px; }
  body.admin-bar .phkb-site-header { top: 46px; }
  .phkb-header-inner { min-height: 72px; }
  .phkb-brand img { width: 44px; height: 44px; flex-basis: 44px; }
  .phkb-brand-copy small { display: none; }
  .phkb-menu-button { display: inline-flex; align-items: center; justify-content: center; }
  .phkb-nav { position: absolute; inset: 72px 0 auto; display: none; padding: 16px 20px 24px; border-bottom: 1px solid var(--phkb-line); background: var(--phkb-paper); }
  .phkb-nav[data-open="true"] { display: grid; }
  .phkb-nav a, .phkb-nav a:nth-child(4) { display: flex; min-height: 48px; padding: 10px 0; border-bottom: 1px solid var(--phkb-line); }
  .phkb-section { padding-block: 64px; }
  .phkb-display { font-size: clamp(42px, 13vw, 58px); }
  .phkb-lead { font-size: 18px; line-height: 1.65; }
  .phkb-rule-title { align-items: flex-start; margin-bottom: 28px; }
  .phkb-grid--3, .phkb-grid--2, .phkb-entry-grid, .phkb-login-grid { grid-template-columns: 1fr; }
  .phkb-entry { min-height: 300px; }
  .phkb-filter-toggle { display: inline-flex; margin-bottom: 12px; }
  .phkb-filter-panel[hidden] { display: none; }
  .phkb-filter-form { grid-template-columns: 1fr; }
  .phkb-filter-form .phkb-field--region { display: grid; }
  .phkb-filter-form .phkb-button { width: 100%; }
  .phkb-facts { grid-template-columns: 1fr; }
  .phkb-fact { padding-right: 0; border-bottom: 1px solid var(--phkb-line); }
  .phkb-fact:last-child { border-bottom: 0; }
  .phkb-toc { display: none; }
  .phkb-prose h2 { margin-top: 56px; font-size: 29px; }
  .phkb-prose p, .phkb-prose li { font-size: 17px; line-height: 1.76; }
  .phkb-source-row { grid-template-columns: 1fr; gap: 7px; }
  .phkb-member-content { padding: 24px 20px; }
  .phkb-login-grid { gap: 36px; }
  .phkb-footer-inner { grid-template-columns: 1fr; }
  .phkb-footer-inner nav { justify-self: start; }
}

@media (max-width: 420px) {
  .phkb-brand-copy strong { font-size: 14px; }
  .phkb-card h3 { font-size: 23px; }
  .phkb-member-gate .phkb-actions { display: grid; }
}