/* 紅康官網 — 視覺層（預覽稿，蘋果風格排版，非複製其資產或文案） */

:root{
  --ink:#1d1d1f;
  --ink-soft:#424245;
  --muted:#86868b;
  --line:rgba(0,0,0,.08);
  --paper:#ffffff;
  --mist:#fbfbfd;
  --soft:#f5f5f7;
  --dark:#000000;
  --dark-2:#1d1d1f;
  --blue:#0071e3;
  --blue-hover:#0077ed;
  --on-dark:#f5f5f7;
  --on-dark-muted:#a1a1a6;
  --max:980px;
  --max-wide:1080px;
  --radius:28px;
  --nav-h:48px;
  --ease:cubic-bezier(.25,.1,.25,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth; -webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:-apple-system,"SF Pro TC","PingFang TC","Noto Sans TC","Hiragino Sans CNS","Microsoft JhengHei",sans-serif;
  font-size:17px;
  line-height:1.47;
  letter-spacing:-.011em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%; height:auto; display:block}
a{color:var(--blue); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{width:100%; max-width:var(--max-wide); margin:0 auto; padding:0 20px}

/* ── 無 JS 時內容照常可見；有 JS 才做淡入 ── */
.js .reveal{opacity:0; transform:translateY(22px); transition:opacity .8s var(--ease), transform .8s var(--ease)}
.js .reveal.in{opacity:1; transform:none}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .js .reveal,.js .reveal.in{opacity:1; transform:none; transition:none}
}

/* ── 導覽 ── */
.topnav{
  position:sticky; top:0; z-index:50;
  height:var(--nav-h);
  background:rgba(22,22,23,.8);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.topnav .wrap{
  display:flex; align-items:center; gap:16px;
  height:var(--nav-h); max-width:var(--max-wide);
}
.brand{
  display:flex; align-items:center; gap:8px;
  color:var(--on-dark); text-decoration:none; font-weight:600;
  font-size:14px; letter-spacing:-.01em; white-space:nowrap; z-index:2;
}
.brand:hover{text-decoration:none; opacity:.85}
.brand .mark{
  width:22px; height:22px; border-radius:6px; background:#fff;
  color:#000; display:grid; place-items:center;
  font-size:12px; font-weight:700; line-height:1;
}
.brand-name{padding-top:1px}
.navlinks{display:flex; gap:20px; margin-left:auto; font-size:12px}
.navlinks a{
  color:rgba(255,255,255,.8); text-decoration:none; white-space:nowrap;
  padding:4px 0; font-weight:400;
}
.navlinks a:hover,.navlinks a.on{color:#fff; text-decoration:none}
.btn-nav{
  padding:5px 12px; font-size:12px; margin-left:4px;
  background:var(--blue); color:#fff;
}
.burger{
  display:none; margin-left:auto; width:40px; height:40px;
  border:0; background:transparent; cursor:pointer; padding:0;
  position:relative; z-index:2;
}
.burger span{
  display:block; width:16px; height:1px; background:#fff; margin:5px auto;
  transition:transform .25s var(--ease);
}
body.nav-open .burger span:first-child{transform:translateY(3px) rotate(45deg)}
body.nav-open .burger span:last-child{transform:translateY(-3px) rotate(-45deg)}

@media(max-width:834px){
  .burger{display:block}
  .topnav .btn.btn-nav{display:none}
  .navlinks{
    display:none; position:absolute; top:var(--nav-h); left:0; right:0;
    background:rgba(22,22,23,.96);
    backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px);
    flex-direction:column; gap:0; padding:8px 20px 28px;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .navlinks.open{display:flex}
  .navlinks a{padding:14px 0; font-size:17px; border-bottom:1px solid rgba(255,255,255,.08); color:#f5f5f7}
}
@media(min-width:835px){
  .wrap{padding:0 28px}
}

/* ── 按鈕 ── */
.btn{
  display:inline-block; background:var(--blue); color:#fff !important;
  text-decoration:none; padding:10px 20px; border-radius:980px;
  font-weight:500; font-size:17px; line-height:1.3;
  border:1px solid transparent; transition:background .2s var(--ease);
}
.btn:hover{background:var(--blue-hover); text-decoration:none}
.btn.ghost{
  background:var(--soft); color:var(--blue) !important; border-color:transparent;
}
.btn.ghost:hover{background:#e8e8ed; text-decoration:none}
.hero .btn.ghost, .phead .btn.ghost, .band-dark .btn.ghost{
  background:rgba(255,255,255,.12); color:#fff !important;
}
.hero .btn.ghost:hover, .phead .btn.ghost:hover, .band-dark .btn.ghost:hover{
  background:rgba(255,255,255,.2);
}
.cta, .band-cta{display:flex; gap:12px; flex-wrap:wrap; justify-content:center}
.band-cta{margin-top:40px}

/* ── Hero / 內頁頁首 ── */
.hero, .phead{
  background:var(--dark);
  color:var(--on-dark);
  text-align:center;
  padding:88px 0 96px;
  position:relative;
  overflow:hidden;
}
.hero::before, .phead::before{
  content:""; position:absolute; inset:0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(80,80,90,.45), transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 110%, rgba(0,113,227,.16), transparent 55%);
  pointer-events:none;
}
.hero .wrap, .phead .wrap{position:relative; z-index:1; max-width:var(--max)}
.eyebrow{
  color:var(--on-dark-muted);
  font-size:14px; font-weight:600; letter-spacing:.12em;
  margin:0 0 16px;
}
h1{
  font-size:clamp(2.5rem, 9vw, 4.5rem);
  line-height:1.08;
  margin:0 0 20px;
  letter-spacing:-.04em;
  font-weight:700;
  text-wrap:balance;
}
.lede, .phead p{
  font-size:clamp(1.05rem, 2.4vw, 1.3125rem);
  color:var(--on-dark-muted);
  max-width:640px;
  margin:0 auto 32px;
  font-weight:400;
  line-height:1.5;
}
.phead{padding:80px 0 88px}
.phead h1{font-size:clamp(2.1rem, 7vw, 3.5rem); margin-bottom:16px}
.hero .cta{margin-top:8px}

/* ── 區塊 ── */
.band, section{
  padding:88px 0;
  border:0;
}
.band .wrap{max-width:var(--max-wide)}
.band-light{background:var(--paper); color:var(--ink)}
.band-mist{background:var(--soft); color:var(--ink)}
.band-dark{
  background:var(--dark-2);
  color:var(--on-dark);
}
.kicker{
  color:var(--muted);
  font-size:13px; font-weight:600; letter-spacing:.14em;
  margin:0 0 12px; text-align:center;
}
h2{
  font-size:clamp(1.75rem, 5vw, 3rem);
  line-height:1.14;
  margin:0 0 14px;
  letter-spacing:-.03em;
  font-weight:700;
  text-align:center;
  text-wrap:balance;
}
h3{font-weight:600; letter-spacing:-.02em; margin:0}
.sub{
  color:var(--muted);
  max-width:620px;
  margin:0 auto 48px;
  font-size:18px;
  line-height:1.47;
  text-align:center;
}
.band-dark .kicker{color:var(--on-dark-muted)}
.band-dark .sub, .band-dark .note{color:var(--on-dark-muted)}
.band-dark h2, .band-dark h3{color:#fff}

.grid{display:grid; gap:16px}
.g2{grid-template-columns:1fr}
.g3{grid-template-columns:1fr}
.g4{grid-template-columns:1fr}
@media(min-width:640px){
  .g2{grid-template-columns:repeat(2,1fr)}
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .wrap{padding:0 28px}
  .band, section{padding:108px 0}
  .hero{padding:120px 0 128px}
}
@media(min-width:900px){
  .g3{grid-template-columns:repeat(3,1fr)}
  .g4{grid-template-columns:repeat(4,1fr)}
  .gap-wide{gap:20px}
}

/* ── 卡片／磁磚 ── */
.card, .case, .casefull, .biz, .svc, .ci, .fact{
  background:var(--paper);
  border:0;
  border-radius:var(--radius);
  padding:32px 28px;
  box-shadow:none;
}
.band-light .card, .band-light .case, .band-light .casefull, .band-light .biz, .band-light .svc, .band-light .fact{
  background:var(--soft);
}
.band-dark .card, .band-dark .ci{
  background:rgba(255,255,255,.08);
  color:#fff;
}
.band-dark .card p, .band-dark .card h3{color:inherit}
.band-dark .card p{color:var(--on-dark-muted)}
.card h3, .case h3{margin:0 0 8px; font-size:21px; letter-spacing:-.02em}
.card p, .case p{margin:0; color:var(--muted); font-size:16px; line-height:1.47}
.card .ico, .svc .ico, .biz .ico{
  width:44px; height:44px; border-radius:12px;
  background:var(--soft);
  display:grid; place-items:center;
  font-size:22px; margin-bottom:18px;
}
.band-light .card .ico, .band-light .svc .ico{background:var(--paper)}
.band-dark .card .ico{background:rgba(255,255,255,.1)}
.card a.more, a.more{
  display:inline-block; margin-top:16px;
  color:var(--blue); text-decoration:none;
  font-size:16px; font-weight:500;
}
.card a.more:hover, a.more:hover{text-decoration:underline}

/* ── 數字 ── */
.stats{
  display:grid; grid-template-columns:1fr;
  gap:28px; margin:0 0 56px; text-align:center;
  border:0;
}
.stat{padding:0}
.stat .n{
  font-size:clamp(3rem, 8vw, 4.5rem);
  font-weight:700; letter-spacing:-.04em; line-height:1;
  color:var(--ink);
}
.stat .n span{font-size:.55em; color:var(--muted); margin-left:2px}
.stat .l{color:var(--muted); font-size:15px; margin-top:8px}
.band-dark .stat .n{color:#fff}
@media(min-width:640px){
  .stats{grid-template-columns:repeat(3,1fr); gap:20px}
}

/* ── 支柱 ── */
.pillar{
  display:flex; gap:20px; padding:28px 0;
  border-top:1px solid var(--line);
  max-width:780px; margin:0 auto;
}
.pillar:last-child{border-bottom:1px solid var(--line)}
.pillar .num{font-size:13px; font-weight:600; color:var(--muted); min-width:36px; padding-top:6px; letter-spacing:.08em}
.pillar h3{margin:0 0 6px; font-size:21px}
.pillar p{margin:0; color:var(--muted); font-size:16px}
.band-dark .pillar{border-color:rgba(255,255,255,.12)}
.band-dark .pillar p, .band-dark .pillar .num{color:var(--on-dark-muted)}

/* ── 服務詳細 ── */
.svc{
  display:grid; grid-template-columns:1fr; gap:24px;
  padding:36px 32px; margin:0 0 16px;
}
.svc h3{margin:0 0 10px; font-size:24px}
.svc .lede2{color:var(--muted); margin:0 0 16px; font-size:16px}
.svc ul{margin:0; padding-left:0; list-style:none}
.svc li{position:relative; padding-left:22px; margin-bottom:10px; font-size:16px; color:var(--ink-soft)}
.svc li::before{content:""; position:absolute; left:0; top:.62em; width:6px; height:6px; border-radius:50%; background:var(--blue)}
.svc .fit{margin-top:18px; padding-top:16px; border-top:1px solid var(--line); font-size:14px; color:var(--muted)}
.svc .fit b{color:var(--ink)}
@media(min-width:820px){ .svc{grid-template-columns:1fr 1fr; gap:40px; padding:44px 40px} }

/* ── 案例 ── */
.case{display:flex; flex-direction:column; gap:10px; padding:28px}
.tags{display:flex; gap:8px; flex-wrap:wrap}
.tag{
  font-size:12px; color:var(--ink-soft); background:var(--soft);
  padding:4px 10px; border-radius:980px; border:0;
}
.tag.live{color:#155e3a; background:#e4f5ea; font-weight:600}
.casefull{padding:32px; margin:0 0 16px}
.casefull h3{margin:10px 0 20px; font-size:22px}
.qa{display:grid; grid-template-columns:1fr; gap:22px}
.qa .k{font-size:12px; font-weight:600; letter-spacing:.1em; color:var(--muted); margin-bottom:8px}
.qa p{margin:0; color:var(--ink-soft); font-size:16px}
@media(min-width:760px){ .qa{grid-template-columns:1fr 1fr; gap:32px} }

.note{
  margin-top:32px; font-size:14px; color:var(--muted);
  background:transparent; border:0; padding:0;
  max-width:720px; margin-left:auto; margin-right:auto;
  text-align:center; line-height:1.5;
}
.band-dark .note{color:var(--on-dark-muted)}

/* ── 事業體 ── */
.biz{overflow:hidden; display:flex; flex-direction:column; padding:0}
.biz .top{padding:28px 28px 0}
.biz .top .ico{font-size:26px; margin-bottom:14px}
.biz h3{margin:0 0 4px; font-size:21px}
.biz .tagline{color:var(--blue); font-size:13px; font-weight:600; margin-bottom:14px}
.biz p{margin:0 0 20px; color:var(--muted); font-size:16px; padding:0 28px}
.biz .foot{
  margin-top:auto; border-top:1px solid var(--line);
  background:transparent; padding:14px 28px 22px;
  font-size:13px; color:var(--muted);
}

/* ── 公司資料 / 聯絡 ── */
.fact{padding:24px 26px}
.fact-k{font-size:12px; color:var(--muted); margin-bottom:6px; letter-spacing:.04em}
.fact-v{font-weight:600; font-size:16px; letter-spacing:-.01em; word-break:break-word}
.cinfo{display:grid; gap:16px; grid-template-columns:1fr; margin-bottom:32px}
.cinfo + .btn{display:table; margin:0 auto}
.ci{padding:24px}
.ci .k{font-size:13px; color:var(--on-dark-muted); margin-bottom:6px}
.ci .v{font-size:17px; font-weight:600; word-break:break-all}
.ci a{color:#2997ff}
.ci a:hover{text-decoration:underline}
@media(min-width:640px){
  .cinfo{grid-template-columns:repeat(3,1fr)}
}

/* ── 收尾 CTA ── */
.endcta{
  background:var(--dark);
  color:#fff;
  padding:108px 0;
  text-align:center;
  border:0;
  position:relative;
  overflow:hidden;
}
.endcta::before{
  content:""; position:absolute; inset:0;
  background:radial-gradient(ellipse 60% 50% at 50% 120%, rgba(0,113,227,.18), transparent 60%);
  pointer-events:none;
}
.endcta .wrap{position:relative; z-index:1; max-width:var(--max)}
.endcta h2{margin-bottom:12px; color:#fff}
.endcta p{color:var(--on-dark-muted); margin:0 auto 28px; max-width:560px}

/* ── 頁尾 ── */
footer{
  background:var(--soft);
  color:var(--muted);
  font-size:12px;
  line-height:1.5;
  padding:28px 0 40px;
  border-top:1px solid var(--line);
}
footer .wrap{
  display:grid;
  gap:16px;
}
.foot-legal{color:var(--ink); font-weight:600; font-size:13px; margin-bottom:4px}
.foot-meta, .foot-copy{color:var(--muted)}
footer .fnav{display:flex; gap:16px; flex-wrap:wrap}
footer a{color:var(--ink-soft)}
footer a:hover{color:var(--ink); text-decoration:underline}
@media(min-width:700px){
  footer .wrap{
    grid-template-columns:1fr auto;
    align-items:start;
  }
  .foot-copy{grid-column:1 / -1}
}

/* ── 截圖牆 ── */
.shots{margin-top:28px; padding-top:24px; border-top:1px solid var(--line)}
.shots-k{font-size:12px; font-weight:600; letter-spacing:.1em; color:var(--muted); margin-bottom:14px}
.shots-grid{display:grid; gap:14px; grid-template-columns:1fr}
.shot{
  margin:0; cursor:zoom-in; border:0; border-radius:18px; overflow:hidden;
  background:var(--paper);
}
.shot:hover,.shot:focus{outline:none}
.shot img{
  width:100%; height:220px; object-fit:contain; object-position:center;
  background:#fff; padding:8px;
}
.shot figcaption{padding:10px 14px; font-size:13px; color:var(--muted); background:transparent}
.shots-note{margin-top:12px; font-size:12px; color:var(--muted); text-align:left}
@media(min-width:640px){ .shots-grid{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))} }

/* ── 燈箱 ── */
#lb{position:fixed; inset:0; z-index:200; background:rgba(0,0,0,.86); display:none;
    align-items:center; justify-content:center; padding:24px; cursor:zoom-out}
#lb.open{display:flex}
#lb figure{margin:0; max-width:1100px; max-height:100%; display:flex; flex-direction:column; gap:14px}
#lb img{max-width:100%; max-height:78vh; object-fit:contain; border-radius:16px}
#lb figcaption{color:#a1a1a6; font-size:14px; text-align:center}
#lb .x{
  position:absolute; top:16px; right:16px; color:#fff;
  background:rgba(255,255,255,.12); border:0; border-radius:980px;
  width:36px; height:36px; font-size:18px; cursor:pointer; line-height:1;
}

/* ── FAQ ── */
.faqs{border-top:1px solid var(--line); max-width:780px; margin:0 auto}
.faq{border-bottom:1px solid var(--line); padding:0}
.faq summary{
  cursor:pointer; padding:20px 40px 20px 0; font-weight:600; font-size:18px;
  list-style:none; position:relative; letter-spacing:-.02em;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+"; position:absolute; right:0; top:20px;
  color:var(--muted); font-weight:400; font-size:22px;
}
.faq[open] summary::after{content:"–"}
.faq summary:hover{color:var(--blue)}
.faq p{margin:0 0 22px; color:var(--muted); font-size:16px; max-width:680px; padding-right:40px}

@media (prefers-reduced-motion: reduce){
  .btn, .burger span{transition:none}
}