/*
Theme Name: KC Chang Theme
Theme URI: https://kcchang.com
Author: KC Chang Team
Description: 張光正醫師個人品牌網站主題 — SEO 優先、輕量、專業醫師形象設計
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.9
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: kcchang
*/

/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --color-primary:#1B2A4A;
  --color-accent:#C9A96E;
  --color-text:#333;
  --color-text-light:#666;
  --color-bg:#fff;
  --color-bg-alt:#F8F9FA;
  --color-border:#E5E7EB;
  --font-heading:'Noto Serif TC',serif;
  --font-body:'Noto Sans TC',sans-serif;
  --max-width:1100px;
  --gap:2rem;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--color-text);background:var(--color-bg);line-height:1.8;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--color-primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--color-accent)}
h1,h2,h3,h4{font-family:var(--font-heading);color:var(--color-primary);line-height:1.4;font-weight:700}
h1{font-size:2.2rem}h2{font-size:1.7rem}h3{font-size:1.3rem}h4{font-size:1.1rem}
p{margin-bottom:1rem}
ul,ol{padding-left:1.5rem;margin-bottom:1rem}
.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* === Header === */
.site-header{background:var(--color-primary);position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.1)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.site-brand{color:#fff;font-family:var(--font-heading);font-size:1.2rem;font-weight:700;letter-spacing:.05em}
.site-brand span{color:var(--color-accent)}
.site-nav{display:flex;gap:1.5rem;list-style:none;padding:0;margin:0}
.site-nav a{color:rgba(255,255,255,.85);font-size:.9rem;font-weight:500;padding:.3rem 0;border-bottom:2px solid transparent;transition:all .2s}
.site-nav a:hover,.site-nav .current-menu-item>a{color:#fff;border-bottom-color:var(--color-accent)}
.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* === Hero Split Screen === */
.hero-split{display:grid;grid-template-columns:1fr 1fr;min-height:calc(100vh - 64px);overflow:hidden}
.hero-content{background:linear-gradient(160deg,#0f1b33 0%,var(--color-primary) 50%,#2d4a7a 100%);color:#fff;display:flex;align-items:center;padding:3rem 4rem 3rem 3rem}
.hero-inner{max-width:480px;margin-left:auto}
.hero-label{color:var(--color-accent);font-size:.75rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;margin-bottom:1.5rem}
.hero-split h1{color:#fff;font-size:3rem;line-height:1.2;margin-bottom:.3rem}
.hero-split h1 span{display:block;font-size:1.5rem;font-weight:400;color:rgba(255,255,255,.7);margin-top:.2rem}
.hero-tagline{color:var(--color-accent);font-family:var(--font-heading);font-size:1.1rem;margin-bottom:1.2rem}
.hero-divider{width:48px;height:2px;background:var(--color-accent);margin-bottom:1.2rem}
.hero-desc{color:rgba(255,255,255,.75);font-size:.95rem;line-height:1.9;margin-bottom:2rem}
.hero-actions{display:flex;gap:.8rem;flex-wrap:wrap}
.btn-ghost{color:rgba(255,255,255,.8);font-weight:500;padding:.75rem 1.5rem;transition:color .2s}
.btn-ghost:hover{color:var(--color-accent)}
.hero-image{position:relative;background:#1a1a2e}
.hero-image img{width:100%;height:100%;object-fit:cover;object-position:top center;display:block}
.hero-image::before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,var(--color-primary) 0%,transparent 15%);z-index:1;pointer-events:none}
.btn{display:inline-block;padding:.75rem 2rem;border-radius:4px;font-weight:600;font-size:.95rem;transition:all .2s;cursor:pointer;border:none}
.btn-accent{background:var(--color-accent);color:#fff}
.btn-accent:hover{background:#b8983f;color:#fff}
.btn-outline{border:2px solid rgba(255,255,255,.5);color:#fff;margin-left:.5rem}
.btn-outline:hover{border-color:#fff;color:#fff}

/* === Sections === */
.section{padding:4rem 0}
.section-alt{background:var(--color-bg-alt)}
.section-title{text-align:center;margin-bottom:.5rem}
.section-subtitle{text-align:center;color:var(--color-text-light);margin-bottom:2.5rem;font-size:.95rem}

/* === Specialty Cards === */
.specialty-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem}
.specialty-card{background:#fff;border:1px solid var(--color-border);border-radius:8px;padding:2rem 1.5rem;text-align:center;transition:box-shadow .2s}
.specialty-card:hover{box-shadow:0 4px 20px rgba(0,0,0,.08)}
.specialty-card .icon{font-size:2.5rem;margin-bottom:1rem}
.specialty-card h3{margin-bottom:.5rem;font-size:1.1rem}
.specialty-card p{color:var(--color-text-light);font-size:.9rem;line-height:1.7}

/* === Stats === */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;text-align:center}
.stat-item .number{font-size:2.5rem;font-weight:700;color:var(--color-accent);font-family:var(--font-heading)}
.stat-item .label{color:var(--color-text-light);font-size:.9rem;margin-top:.3rem}

/* === Posts Grid === */
.posts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}
.post-card{background:#fff;border:1px solid var(--color-border);border-radius:8px;overflow:hidden;transition:box-shadow .2s}
.post-card:hover{box-shadow:0 4px 20px rgba(0,0,0,.08)}
.post-card .card-body{padding:1.5rem}
.post-card .cat{color:var(--color-accent);font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.post-card h3{font-size:1.1rem;margin:.5rem 0}
.post-card h3 a{color:var(--color-primary)}
.post-card h3 a:hover{color:var(--color-accent)}
.post-card .excerpt{color:var(--color-text-light);font-size:.9rem;line-height:1.7}
.post-card .meta{color:var(--color-text-light);font-size:.8rem;margin-top:.8rem}

/* === CTA Section === */
.cta-section{background:var(--color-primary);color:#fff;text-align:center;padding:4rem 0}
.cta-section h2{color:#fff;margin-bottom:.5rem}
.cta-section p{color:rgba(255,255,255,.8);margin-bottom:1.5rem}

/* === Page Content === */
.page-hero{background:linear-gradient(135deg,var(--color-primary) 0%,#2d4a7a 100%);color:#fff;padding:3rem 0;text-align:center}
.page-hero h1{color:#fff;font-size:2rem;margin-bottom:.3rem}
.page-hero .page-desc{color:rgba(255,255,255,.7);font-size:1rem}
.page-content{padding:3rem 0}
.page-content .content-wrap{max-width:800px;margin:0 auto}
.page-content h2{margin:2rem 0 1rem;padding-bottom:.5rem;border-bottom:2px solid var(--color-accent)}
.page-content h3{margin:1.5rem 0 .8rem}
.page-content ul{margin-bottom:1.5rem}
.page-content li{margin-bottom:.3rem}
.page-content blockquote{border-left:4px solid var(--color-accent);padding:1rem 1.5rem;margin:1.5rem 0;background:var(--color-bg-alt);font-style:italic;color:var(--color-text-light)}

/* === About Page === */
.about-intro{display:grid;grid-template-columns:1fr 2fr;gap:3rem;align-items:start;margin-bottom:3rem}
.about-photo{border-radius:8px;box-shadow:0 4px 20px rgba(0,0,0,.1)}
.credential-list{list-style:none;padding:0}
.credential-list li{padding:.5rem 0;border-bottom:1px solid var(--color-border);font-size:.95rem}
.credential-list li::before{content:"▸ ";color:var(--color-accent);font-weight:700}
.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}
.book-card{background:var(--color-bg-alt);border-radius:8px;padding:1.5rem}
.book-card h4{margin-bottom:.5rem}
.book-card .book-type{color:var(--color-accent);font-size:.8rem;font-weight:600;text-transform:uppercase}

/* === Academic Page === */
.timeline{position:relative;padding-left:2rem}
.timeline::before{content:'';position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--color-accent)}
.timeline-item{position:relative;margin-bottom:2rem;padding-left:1.5rem}
.timeline-item::before{content:'';position:absolute;left:-2.35rem;top:.5rem;width:12px;height:12px;border-radius:50%;background:var(--color-accent);border:2px solid #fff;box-shadow:0 0 0 2px var(--color-accent)}
.timeline-item h4{margin-bottom:.3rem}
.timeline-item .venue{color:var(--color-text-light);font-size:.9rem}

/* === Contact === */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem}
.contact-info .info-item{display:flex;gap:1rem;margin-bottom:1.5rem;align-items:flex-start}
.contact-info .info-item .icon{font-size:1.3rem;color:var(--color-accent);min-width:1.5rem;text-align:center}
.contact-info .info-item h4{margin-bottom:.2rem;font-size:1rem}
.contact-info .info-item p{color:var(--color-text-light);font-size:.9rem;margin:0}
.contact-form .wpcf7 input[type="text"],.contact-form .wpcf7 input[type="email"],.contact-form .wpcf7 textarea{width:100%;padding:.7rem 1rem;border:1px solid var(--color-border);border-radius:4px;font-family:var(--font-body);font-size:.95rem;transition:border-color .2s}
.contact-form .wpcf7 input:focus,.contact-form .wpcf7 textarea:focus{outline:none;border-color:var(--color-accent)}
.contact-form .wpcf7 input[type="submit"]{background:var(--color-accent);color:#fff;border:none;padding:.75rem 2rem;border-radius:4px;font-weight:600;cursor:pointer;transition:background .2s}
.contact-form .wpcf7 input[type="submit"]:hover{background:#b8983f}

/* === Blog Archive === */
.archive-header{margin-bottom:2rem}
.cat-filter{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:2rem;list-style:none;padding:0}
.cat-filter a{display:inline-block;padding:.4rem 1rem;border:1px solid var(--color-border);border-radius:20px;font-size:.85rem;color:var(--color-text-light);transition:all .2s}
.cat-filter a:hover,.cat-filter .current-cat a{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}

/* === Single Post === */
.single-header{text-align:center;margin-bottom:2rem}
.single-header .cat{color:var(--color-accent);font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.single-header h1{font-size:2rem;margin:.5rem 0}
.single-header .meta{color:var(--color-text-light);font-size:.9rem}
.single-content{max-width:750px;margin:0 auto}
.single-content p{margin-bottom:1.2rem;line-height:2}
.single-content h2{margin:2.5rem 0 1rem}
.single-content h3{margin:2rem 0 .8rem}
.single-content img{border-radius:8px;margin:1.5rem 0}
.post-nav{display:flex;justify-content:space-between;margin-top:3rem;padding-top:2rem;border-top:1px solid var(--color-border)}
.post-nav a{color:var(--color-text-light);font-size:.9rem}
.post-nav a:hover{color:var(--color-accent)}

/* === Breadcrumb === */
.breadcrumb{font-size:.85rem;color:var(--color-text-light);padding:.8rem 0}
.breadcrumb a{color:var(--color-text-light)}
.breadcrumb a:hover{color:var(--color-accent)}
.breadcrumb .sep{margin:0 .4rem;opacity:.5}

/* === Footer === */
.site-footer{background:var(--color-primary);color:rgba(255,255,255,.7);padding:3rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem;margin-bottom:2rem}
.site-footer h4{color:#fff;font-size:1rem;margin-bottom:.8rem}
.site-footer a{color:rgba(255,255,255,.7);transition:color .2s}
.site-footer a:hover{color:var(--color-accent)}
.footer-nav{list-style:none;padding:0}
.footer-nav li{margin-bottom:.4rem}
.footer-nav a{font-size:.9rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:1.5rem;text-align:center;font-size:.85rem}

/* === Pagination === */
.pagination{display:flex;justify-content:center;gap:.5rem;margin-top:2rem}
.pagination a,.pagination span{display:inline-block;padding:.4rem .8rem;border:1px solid var(--color-border);border-radius:4px;font-size:.9rem}
.pagination .current{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}

/* === 404 === */
.error-404{text-align:center;padding:5rem 0}
.error-404 h1{font-size:5rem;color:var(--color-accent)}
.error-404 p{font-size:1.1rem;color:var(--color-text-light)}

/* === Responsive === */
@media(max-width:768px){
  .site-nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--color-primary);flex-direction:column;padding:1rem 1.5rem;gap:.5rem;box-shadow:0 4px 12px rgba(0,0,0,.2)}
  .site-nav.active{display:flex}
  .menu-toggle{display:block}
  .hero-split{grid-template-columns:1fr;min-height:auto}
  .hero-content{padding:2.5rem 1.5rem;text-align:center}
  .hero-inner{margin:0 auto}
  .hero-split h1{font-size:2rem}
  .hero-split h1 span{font-size:1.2rem}
  .hero-divider{margin:1.2rem auto}
  .hero-actions{justify-content:center}
  .hero-image{height:50vh;max-height:400px}
  .hero-image::before{background:linear-gradient(180deg,var(--color-primary) 0%,transparent 20%)}
  .about-intro{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .posts-grid{grid-template-columns:1fr}
  h1{font-size:1.8rem}h2{font-size:1.4rem}
}


/* === Academy Page === */
.academy-hero{background:linear-gradient(150deg,#0f1e38 0%,#1B2A4A 60%,#2a3f6a 100%);color:#fff;padding:5rem 0 4rem;text-align:center;position:relative;overflow:hidden}
.academy-hero::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
.academy-hero__badge{display:inline-block;background:rgba(201,169,110,.2);border:1px solid rgba(201,169,110,.4);color:var(--color-accent);font-size:.75rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:.35rem 1rem;border-radius:2rem;margin-bottom:1.5rem}
.academy-hero__title{font-family:var(--font-heading);font-size:2.8rem;color:#fff;margin-bottom:.75rem;letter-spacing:.05em}
.academy-hero__subtitle{color:var(--color-accent);font-size:1.1rem;margin-bottom:1.25rem;font-style:italic}
.academy-hero__desc{color:rgba(255,255,255,.7);font-size:.95rem;max-width:640px;margin:0 auto;line-height:1.8}

.academy-about{padding:4rem 0;background:var(--color-bg)}
.academy-about__grid{display:grid;grid-template-columns:1fr 280px;gap:3rem;align-items:start}
.academy-about__text h2{font-family:var(--font-heading);color:var(--color-primary);margin-bottom:1.25rem}
.academy-about__text p{color:var(--color-text);line-height:1.9;margin-bottom:1rem}
.academy-quote{border-left:3px solid var(--color-accent);padding:1rem 1.5rem;margin:1.5rem 0 0;background:var(--color-bg-alt);border-radius:0 6px 6px 0;font-style:italic;color:var(--color-text)}
.academy-quote cite{display:block;margin-top:.5rem;font-size:.85rem;color:var(--color-text-light);font-style:normal}
.academy-about__stats{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.academy-stat{background:var(--color-bg-alt);border:1px solid var(--color-border);border-radius:8px;padding:1.25rem 1rem;text-align:center}
.academy-stat__num{display:block;font-family:var(--font-heading);font-size:2rem;color:var(--color-primary);font-weight:700}
.academy-stat__label{display:block;font-size:.8rem;color:var(--color-text-light);margin-top:.25rem}

.academy-principles{padding:4rem 0;background:var(--color-bg-alt)}
.section-title{font-family:var(--font-heading);color:var(--color-primary);font-size:1.6rem;margin-bottom:.5rem;text-align:center}
.section-desc{color:var(--color-text-light);text-align:center;margin-bottom:2.5rem;font-size:.95rem}
.academy-principles__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;margin-top:2rem}
.academy-principle-card{background:#fff;border:1px solid var(--color-border);border-radius:10px;padding:2rem 1.5rem;text-align:center;transition:box-shadow .2s,transform .2s}
.academy-principle-card:hover{box-shadow:0 6px 24px rgba(0,0,0,.08);transform:translateY(-2px)}
.academy-principle-card__icon{font-size:2.2rem;margin-bottom:1rem}
.academy-principle-card h3{font-size:1rem;color:var(--color-primary);margin-bottom:.6rem}
.academy-principle-card p{font-size:.875rem;color:var(--color-text-light);line-height:1.75}

.academy-journals{padding:4rem 0;background:var(--color-bg)}
.academy-journals__header{text-align:center;margin-bottom:2.5rem}
.academy-journals__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.75rem}
.journal-card{background:#fff;border:1px solid var(--color-border);border-radius:10px;overflow:hidden;transition:box-shadow .2s}
.journal-card:hover{box-shadow:0 6px 24px rgba(0,0,0,.08)}
.journal-card__thumb{display:block;overflow:hidden;aspect-ratio:16/9}
.journal-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.journal-card:hover .journal-card__thumb img{transform:scale(1.04)}
.journal-card__body{padding:1.5rem}
.journal-card__meta{color:var(--color-text-light);font-size:.8rem;margin-bottom:.5rem}
.journal-card__title{font-size:1rem;margin-bottom:.6rem;line-height:1.5}
.journal-card__title a{color:var(--color-primary);text-decoration:none}
.journal-card__title a:hover{color:var(--color-accent)}
.journal-card__excerpt{font-size:.875rem;color:var(--color-text-light);line-height:1.75;margin-bottom:1rem}
.journal-card__link{font-size:.85rem;color:var(--color-accent);font-weight:600;text-decoration:none}
.journal-card__link:hover{text-decoration:underline}
.academy-empty{text-align:center;padding:3rem;color:var(--color-text-light);background:var(--color-bg-alt);border-radius:10px;border:1px dashed var(--color-border)}

@media(max-width:900px){
  .academy-about__grid{grid-template-columns:1fr}
  .academy-principles__grid{grid-template-columns:repeat(2,1fr)}
  .academy-journals__grid{grid-template-columns:repeat(2,1fr)}
  .academy-hero__title{font-size:2rem}
}
@media(max-width:600px){
  .academy-principles__grid{grid-template-columns:1fr}
  .academy-journals__grid{grid-template-columns:1fr}
  .academy-about__stats{grid-template-columns:repeat(2,1fr)}
}

/* Search */
.search-toggle{background:none;border:none;color:rgba(255,255,255,.85);cursor:pointer;padding:.4rem;display:flex;align-items:center;border-radius:4px;transition:color .2s,background .2s;flex-shrink:0;margin-left:.5rem}
.search-toggle:hover{color:#fff;background:rgba(255,255,255,.1)}
.search-bar{background:var(--color-primary);border-top:1px solid rgba(255,255,255,.12);max-height:0;overflow:hidden;transition:max-height .25s ease,padding .25s ease}
.search-bar.open{max-height:80px;padding:.75rem 0}
.search-bar .container{display:flex;gap:.5rem;align-items:center}
.search-bar form{display:flex;gap:.5rem;align-items:center;width:100%}
.search-bar input[type=search]{flex:1;padding:.5rem .9rem;border:1px solid rgba(255,255,255,.25);border-radius:4px;background:rgba(255,255,255,.1);color:#fff;font-size:.95rem;outline:none;transition:border-color .2s,background .2s}
.search-bar input[type=search]::placeholder{color:rgba(255,255,255,.45)}
.search-bar input[type=search]:focus{border-color:var(--color-accent);background:rgba(255,255,255,.15)}
.search-bar button.submit{padding:.5rem 1.1rem;background:var(--color-accent);color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:.9rem;white-space:nowrap;transition:opacity .2s}
.search-bar button.submit:hover{opacity:.85}
.search-bar button.close-btn{background:none;border:none;color:rgba(255,255,255,.6);cursor:pointer;font-size:1.1rem;padding:.4rem;line-height:1;transition:color .2s}
.search-bar button.close-btn:hover{color:#fff}

/* ── 懸浮目錄 ── */
.single-layout{display:flex;gap:48px;align-items:flex-start;max-width:1060px;margin:0 auto}
.single-layout .single-content{flex:1;min-width:0;max-width:750px;margin:0}
.toc-sidebar{position:sticky;top:88px;width:200px;flex-shrink:0;max-height:calc(100vh - 108px);overflow-y:auto;padding:18px 14px;background:#fff;border-radius:8px;border-left:3px solid #c9b99a;box-shadow:0 2px 12px rgba(0,0,0,.06);order:-1}
.toc-sidebar::-webkit-scrollbar{width:3px}
.toc-sidebar::-webkit-scrollbar-thumb{background:#ddd;border-radius:2px}
.toc-sidebar .toc-label{font-size:10px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#aaa;margin-bottom:12px;font-family:-apple-system,sans-serif}
.toc-sidebar ul{list-style:none;margin:0;padding:0}
.toc-sidebar li{margin:2px 0}
.toc-sidebar a{display:block;font-size:12.5px;color:#777;text-decoration:none;padding:5px 8px;border-radius:4px;transition:all .18s ease;font-family:-apple-system,"Noto Sans TC",sans-serif;line-height:1.4}
.toc-sidebar a:hover{color:#2a2a2a;background:#f5f3f0}
.toc-sidebar a.toc-active{color:#2c5f8a;font-weight:600;background:#eef4fa;border-left:2px solid #2c5f8a;padding-left:10px}
@media(max-width:1024px){.toc-sidebar{display:none}.single-layout .single-content{max-width:750px;margin:0 auto}}