/* ============================================================
   shared.css — 香港眼科專科 Hong Kong Eye Specialist
   Mobile-first (<576px); desktop starts at min-width:577px
   Modern, professional redesign. No IE hacks.
   ============================================================ */

/* ---------- RESET ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:"Microsoft JhengHei","PingFang HK","Noto Sans TC",sans-serif;color:#4b3a68;background:#f7f5fa;line-height:1.7}
img{max-width:100%;height:auto;display:block}
a{color:#5b3a8c;text-decoration:none}

/* ---------- FOCUS ACCESSIBILITY ---------- */
a:focus-visible, button:focus-visible, summary:focus-visible{outline:2px solid #7a4fb3;outline-offset:2px;border-radius:3px}

/* ---------- STICKY HEADER + NAV WRAPPER ---------- */
.site-header-nav-wrap{position:sticky;top:0;z-index:99}

/* ---------- BRAND HEADER ---------- */
.site-header{display:flex;align-items:center;gap:8px;background:#fff;padding:6px 10px}
.site-header .logo-link{flex:none;width:36px;height:26px;display:flex;align-items:center}
.site-header .logo-link img{width:36px;height:26px;display:block}
.site-header .brand-text{line-height:1.15;min-width:0}
.site-header .brand-text .cn{font-size:15px;font-weight:700;color:#2b114c;letter-spacing:.3px;white-space:nowrap}
.site-header .brand-text .en{font-size:8px;color:#8a7aa5;letter-spacing:.3px;display:block}
.site-header .cta-contact{flex:none;display:inline-flex;align-items:center;gap:3px;background:linear-gradient(135deg,#5b3a8c,#7a4fb3);color:#fff;font-size:11px;font-weight:700;padding:5px 10px;border-radius:999px;text-decoration:none;white-space:nowrap;box-shadow:0 2px 6px rgba(91,58,140,.25)}
.site-header .cta-whatsapp{flex:none;margin-left:auto;width:30px;height:30px;display:flex;align-items:center;justify-content:center;gap:4px;background:#25D366;color:#fff;border-radius:999px;text-decoration:none;box-shadow:0 2px 6px rgba(37,211,102,.3)}
.site-header .cta-whatsapp svg{flex:none;width:14px;height:14px;fill:#fff}
.site-header .wa-num{display:none;font-size:12px;font-weight:700;white-space:nowrap}
.site-header .header-tagline{flex:1;text-align:center;display:flex;justify-content:center;gap:6px;line-height:1.2}
.site-header .header-tagline .tl-col{display:flex;flex-direction:column;flex:none}
.site-header .header-tagline .tl-col span{font-size:12px;color:#8a7aa5;white-space:nowrap;line-height:1.3}
.site-header .header-tagline .tl-col:first-child span:first-child{color:#5b3a8c;font-weight:600}
.site-header .header-loc{display:flex;flex-direction:row;gap:4px;flex:none;line-height:1.2}
.site-header .header-loc a{font-size:7.5px;color:#c8960c;white-space:nowrap;line-height:1.3;text-decoration:none}

/* Header inner wrapper — flex on both mobile and desktop */
.site-header-inner{display:flex;align-items:center;gap:6px;width:100%}

/* ---------- MAIN NAV (2 rows x 3 cols) ---------- */
.site-nav{background:#fff;border-bottom:1px solid #ece4f5;box-shadow:0 1px 6px rgba(43,17,76,.06)}
.site-nav ul{list-style:none;display:grid;grid-template-columns:repeat(3,1fr)}
.site-nav a{display:flex;align-items:center;justify-content:center;padding:10px 8px;font-size:14px;color:#4b3a68;text-decoration:none;min-height:44px;font-weight:500;border-radius:8px;margin:3px;cursor:pointer;background:#faf7fd;border:1px solid #ece4f5;transition:all .15s}
.site-nav a:hover{background:#fff;color:#5b3a8c;border-color:#d9c8ec;box-shadow:0 2px 8px rgba(91,58,140,.1);transform:translateY(-1px)}
.site-nav a.cur{color:#fff;font-weight:700;background:linear-gradient(135deg,#5b3a8c,#7a4fb3);border-color:transparent;box-shadow:0 2px 8px rgba(91,58,140,.2)}

/* ---------- BREADCRUMBS ---------- */
.breadcrumbs{font-size:11px;color:#b79ad9;padding:2px 10px;background:#fff;border-bottom:1px solid #f4effa;display:flex;align-items:center;gap:4px;justify-content:space-between}
.breadcrumbs .bc-left{display:flex;align-items:center;gap:4px;flex:none}
.breadcrumbs .bc-left a{color:#8a7aa5;text-decoration:none}
.breadcrumbs .bc-left a:hover{color:#5b3a8c}
.breadcrumbs .bc-left .sep{color:#d9c8ec}
.breadcrumbs .bc-left .cur{color:#5b3a8c;font-weight:600}
.breadcrumbs .bc-right{display:flex;gap:8px;flex:none;margin-left:auto;align-items:center;line-height:1.2}
.breadcrumbs .bc-right .bc-tagline{display:flex;flex-direction:column}
.breadcrumbs .bc-right .bc-tagline span{font-size:11px;color:#8a7aa5;white-space:nowrap;line-height:1.3}
.breadcrumbs .bc-right .bc-tagline span:first-child{color:#5b3a8c;font-weight:600}
.breadcrumbs .bc-right .bc-loc{display:flex;flex-direction:row;gap:4px}
.breadcrumbs .bc-right .bc-loc a{font-size:13px;color:#c8960c;white-space:nowrap;line-height:1.3;text-decoration:none}

/* ---------- PAGE HERO SLIDESHOW ---------- */
.hero-slideshow{position:relative;overflow:hidden;background:#2b114c;aspect-ratio:918/209}
.hero-slides{display:flex;width:200%;height:100%;animation:heroSlide 12s infinite}
.hero-slides img{width:50%;height:100%;flex:none;display:block;object-fit:cover;object-position:50% 30%}
.hero-slides:hover{animation-play-state:paused}
@keyframes heroSlide{0%,42%{transform:translateX(0)}50%,92%{transform:translateX(-50%)}100%{transform:translateX(0)}}
.hero-dots{position:absolute;bottom:8px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:2}
.hero-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.4);animation:heroDotBlink 12s infinite}
.hero-dot:nth-child(1){animation-delay:0s}
.hero-dot:nth-child(2){animation-delay:6s}
@keyframes heroDotBlink{0%,42%{background:rgba(255,255,255,.9)}50%,100%{background:rgba(255,255,255,.4)}}
.hero-caption{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,rgba(0,0,0,.55));color:#fff;padding:32px 16px 14px;text-align:center;z-index:1}
.hero-caption h1{font-size:18px;font-weight:700;letter-spacing:1px;margin:0}
.hero-caption .sub{font-size:12px;opacity:.85;margin-top:3px;font-weight:400}

/* ---------- PILL BAR (14 disease chips: scroll on mobile, wrap on desktop) ---------- */
.pill-bar{background:#f7f5fa;padding:8px 12px;display:flex;flex-wrap:nowrap;gap:6px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.pill-bar::-webkit-scrollbar{display:none}
.pill-bar a{flex:none;padding:7px 15px;background:#fff;border:1px solid #ddd0ec;border-radius:999px;font-size:14px;color:#5b3a8c;text-decoration:none;white-space:nowrap;min-height:36px;display:flex;align-items:center;transition:transform .15s,box-shadow .15s}
.pill-bar a:hover{transform:scale(1.05);box-shadow:0 2px 8px rgba(91,58,140,.15)}
.pill-bar a.cur{cursor:default}
.pill-bar a.cur:hover{transform:none;box-shadow:none}
.pill-bar a.cur{background:linear-gradient(135deg,#5b3a8c,#7a4fb3);color:#fff;border-color:transparent;font-weight:700}

/* ---------- COLLAPSIBLE FULL LIST ("查看全部14種") ---------- */
.full-list{margin:0 12px 14px}
.full-list summary{list-style:none;font-size:14px;color:#7a4fb3;font-weight:700;padding:10px 0;cursor:pointer;display:flex;align-items:center;gap:4px}
.full-list summary::-webkit-details-marker{display:none}
.full-list summary .chev{transition:transform .2s;font-size:10px;display:inline-block}
.full-list[open] summary .chev{transform:rotate(180deg)}
.full-list-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding-bottom:4px}
.full-list-grid a{display:flex;align-items:center;gap:6px;background:#fff;border:1px solid #e6dff0;border-radius:8px;padding:9px 10px;font-size:14px;color:#3d2b57;text-decoration:none;min-height:38px}
.full-list-grid a .dot{flex:none;width:6px;height:6px;border-radius:50%;background:#b79ad9}
.full-list-grid a.cur{background:linear-gradient(135deg,#5b3a8c,#7a4fb3);color:#fff;border-color:transparent;font-weight:700}
.full-list-grid a.cur .dot{background:#fff}

/* Desktop: pill bar wraps */
@media(min-width:577px){
  .pill-bar{flex-wrap:wrap;justify-content:center;overflow-x:visible;padding:10px 24px;max-width:960px;margin:0 auto}
    .pill-bar a{font-size:14px;padding:8px 18px}
  .full-list-grid{grid-template-columns:repeat(4,1fr)}
}
/* ---------- SUB-NAV PILL STRIP ---------- */
.sub-nav{background:#f7f5fa;padding:6px 12px;display:flex;flex-wrap:nowrap;gap:6px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.sub-nav::-webkit-scrollbar{display:none}
.sub-nav a{flex:none;padding:6px 14px;background:#fff;border:1px solid #ddd0ec;border-radius:999px;font-size:13px;color:#5b3a8c;text-decoration:none;white-space:nowrap;min-height:32px;display:flex;align-items:center;transition:all .15s}
.sub-nav a:hover{background:#5b3a8c;color:#fff;border-color:transparent}
.sub-nav a.cur{background:linear-gradient(135deg,#5b3a8c,#7a4fb3);color:#fff;border-color:transparent;font-weight:700}
@media(min-width:577px){
  .sub-nav{flex-wrap:wrap;justify-content:center;overflow-x:visible;padding:8px 24px;max-width:960px;margin:0 auto}
}

/* ---------- CONTENT AREA ---------- */
.content{padding:16px 16px 32px;background:#fff;font-size:18px;line-height:1.9;color:#4a3f5c}
.content h2{font-size:26px;color:#2b114c;margin:24px 0 10px;padding-bottom:6px;border-bottom:2px solid #ece4f5}
.content h2:first-child{margin-top:0}
.content h3{font-size:18px;color:#5b3a8c;margin:18px 0 6px;font-weight:700}
.content p{margin:8px 0 14px}
.content img{margin:14px auto;border-radius:8px;box-shadow:0 2px 10px rgba(43,17,76,.08)}
.content ol,.content ul{margin:8px 0 14px;padding-left:0;list-style:none}
.content li{margin-bottom:10px;padding-left:28px;position:relative;line-height:1.7}
.content li::before{content:attr(data-n);position:absolute;left:0;top:1px;width:20px;height:20px;border-radius:50%;background:linear-gradient(135deg,#5b3a8c,#7a4fb3);color:#fff;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1}
.content b,.content strong{color:#2b114c}
.content a{color:#5b3a8c;text-decoration:underline;text-underline-offset:3px}

/* Quick facts box */
.facts-box{background:linear-gradient(135deg,#faf7fd,#f0eaf7);border:1px solid #d9c8ec;border-radius:12px;padding:14px 16px;margin:12px 0 18px;display:grid;grid-template-columns:1fr 1fr;gap:6px 16px;box-shadow:0 2px 6px rgba(91,58,140,.08)}
.facts-box .fact{font-size:15px;line-height:1.6}
.facts-box .fact b{color:#5b3a8c;font-weight:700}
.facts-box .fact .val{color:#2b114c}

/* Card section */
.card-section{background:#faf7fd;border:1px solid #d9c8ec;border-radius:12px;padding:16px 18px 12px;margin:16px 0;box-shadow:0 2px 6px rgba(91,58,140,.06)}
.card-section h3{margin-top:0!important;font-size:16px;border-bottom:1px solid #e6dff0;padding-bottom:8px;margin-bottom:10px}

/* ---------- BACK TO TOP ---------- */
.back-to-top{position:fixed;bottom:24px;right:16px;width:44px;height:44px;background:linear-gradient(135deg,#5b3a8c,#7a4fb3);color:#fff;border:none;border-radius:50%;font-size:20px;cursor:pointer;box-shadow:0 2px 10px rgba(91,58,140,.3);z-index:98;opacity:0;transform:translateY(20px);transition:opacity .3s,transform .3s;pointer-events:none}
.back-to-top.visible{opacity:1;transform:translateY(0);pointer-events:auto}
.back-to-top:hover{background:#7a4fb3;transform:translateY(-2px)}

/* ---------- PAGE FOOTER ---------- */
.site-footer{background:#2b114c;color:#c9a9e8;font-size:13px;padding:16px;text-align:center;line-height:1.8}
.site-footer a{color:#d9c8ec;text-decoration:none}
.site-footer a:hover{color:#fff}
.site-footer .copy{margin-top:8px;font-size:10px;color:#8a7aa5}

/* ========================
   DESKTOP 577px+
   ======================== */
@media(min-width:577px){
  .site-header{padding:10px 24px;display:flex;justify-content:center}
  .site-header-inner{display:flex;align-items:center;gap:10px;max-width:960px;width:100%}
  .site-header .brand-text .cn{font-size:20px}
  .site-header .brand-text .en{font-size:10px}
  .site-header .cta-whatsapp{width:auto;height:auto;border-radius:999px;padding:6px 14px}
  .site-header .cta-whatsapp svg{width:16px;height:16px}
  .site-header .wa-num{display:inline}
  .header-tagline .tl-col span{font-size:13px!important}
  .header-loc a{font-size:12px!important}
  .site-nav ul{display:flex;max-width:960px;margin:0 auto}
    .site-nav a{padding:12px 18px;font-size:15px;min-height:48px}
  .hero-slideshow{max-width:960px;margin:0 auto}
  .hero-caption h1{font-size:18px}
  .content{max-width:960px;margin:0 auto;padding:20px 24px 40px}
  .breadcrumbs{padding:3px 24px;display:flex;justify-content:space-between;max-width:960px;margin:0 auto}
  .breadcrumbs .bc-right{gap:12px}
  .full-list{display:none}
}