/* ═══════════════════════════════════════════════════
   TouchSight Design System  v4.0  (Light / Sage)
   ═══════════════════════════════════════════════════ */

/* ── TOKENS ── */
:root {
  --bg:        #F4F8F5;
  --bg-alt:    #EBF1EE;
  --surface:   #FFFFFF;
  --surface-2: #F7FAF8;
  --line:      rgba(15,42,42,.07);
  --line-2:    rgba(15,42,42,.12);

  /* Ink (text) */
  --ink-900: #0F2A2A;
  --ink-800: #1B3838;
  --ink-700: #2E4E4E;
  --ink-600: #4A6464;
  --ink-500: #6B8282;
  --ink-400: #8C9FAA;
  --ink-300: #B2C4CC;

  /* Teal (primary brand) */
  --teal-50:  #E8F5F4;
  --teal-300: #5BBDB7;
  --teal-400: #4CBDB6;
  --teal-500: #2EA39C;
  --teal-600: #1B8A84;
  --teal-700: #157470;
  --teal-800: #0E5C59;

  /* Clay / Coral (accent) */
  --clay-100:  rgba(208,131,102,.10);
  --clay-500:  #D08366;
  --clay-600:  #BC6E52;
  --clay-700:  #A05A42;
  --coral-500: #D08366;
  --coral-600: #BC6E52;

  /* Amber / Navy */
  --amber-500: #D9A14A;
  --navy-600:  #2A3B5C;

  /* Typography */
  --font-sans:  'Inter','Noto Sans TC',system-ui,sans-serif;
  --font-serif: 'Instrument Serif','Source Serif 4',Georgia,serif;
  --font-mono:  'JetBrains Mono',monospace;

  /* Motion */
  --ease: cubic-bezier(.25,.46,.45,.94);

  /* Layout */
  --nav-h: 68px;
  --max-w: 1200px;
  --r:     14px;
}

/* ── RESET ── */
*,*::before,*::after { box-sizing:border-box;margin:0;padding:0 }
html { scroll-behavior:smooth;-webkit-font-smoothing:antialiased }
body {
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--ink-800);
  line-height:1.65;
  overflow-x:hidden;
}
a { text-decoration:none;color:inherit }
img { max-width:100%;display:block }
button { font:inherit;cursor:pointer;border:none;background:none;color:inherit }
ul { list-style:none;padding:0;margin:0 }

/* ── LANG ── */
[data-lang-key] { display:block }
span[data-lang-key] { display:inline }
body[data-lang="zh"] [data-lang-key="en"] { display:none!important }
body[data-lang="en"] [data-lang-key="zh"] { display:none!important }

/* ── LAYOUT ── */
.container {
  width:100%;max-width:var(--max-w);
  margin:0 auto;padding:0 32px;
}
section { padding:80px 0 }
section.tight { padding:40px 0 }

/* ── TYPOGRAPHY ── */
h1,h2,h3,h4,h5 {
  font-family:var(--font-serif);
  color:var(--ink-900);
  line-height:1.18;
  letter-spacing:-.025em;
}
h1 { font-size:clamp(36px,5vw,64px) }
h2 { font-size:clamp(28px,3.5vw,46px) }
h3 { font-size:clamp(20px,2vw,28px) }
h4 { font-size:18px }
h5 {
  font-size:13px;letter-spacing:.06em;
  text-transform:uppercase;font-family:var(--font-sans);
}
p { color:var(--ink-600);line-height:1.7 }
.lead { font-size:18px;color:var(--ink-600);line-height:1.75;max-width:68ch }
em { font-style:italic;font-family:var(--font-serif) }

.accent-coral {
  background:linear-gradient(135deg,var(--coral-500),var(--clay-700));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ── NAV ── */
.ts-nav {
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--nav-h);
  transition:background .3s,box-shadow .3s;
}
.ts-nav.scrolled {
  background:rgba(244,248,245,.92);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:0 1px 0 var(--line);
}
.ts-nav-inner {
  max-width:var(--max-w);margin:0 auto;padding:0 32px;
  height:100%;display:flex;align-items:center;gap:28px;
}
.ts-logo {
  display:flex;align-items:center;gap:10px;
  font-size:17px;font-weight:800;color:var(--ink-900);letter-spacing:-.025em;
  white-space:nowrap;
}
.ts-logo-mark {
  width:32px;height:32px;border-radius:8px;
  background:linear-gradient(135deg,var(--teal-600),var(--teal-800));
  color:#fff;font-size:12px;font-weight:900;
  display:grid;place-items:center;letter-spacing:.04em;
  box-shadow:0 4px 12px rgba(21,116,112,.35);
}
.ts-nav-links {
  display:flex;align-items:center;gap:2px;flex:1;
}
.ts-nav-links a {
  padding:7px 13px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--ink-600);
  transition:color .2s,background .2s;
}
.ts-nav-links a:hover  { color:var(--ink-900);background:rgba(15,42,42,.04) }
.ts-nav-links a.active { color:var(--teal-700);background:rgba(46,163,156,.10) }
.ts-nav-cta { display:flex;align-items:center;gap:12px;margin-left:auto }
.ts-lang {
  display:flex;align-items:center;gap:2px;
  background:rgba(15,42,42,.04);border-radius:8px;padding:3px;
  border:1px solid var(--line);
}
.ts-lang button {
  padding:5px 10px;border-radius:6px;font-size:12px;font-weight:700;
  color:var(--ink-600);transition:all .2s;
}
.ts-lang button.active { background:var(--teal-500);color:#fff }

/* ── BUTTONS ── */
.btn {
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:10px;
  font-size:14px;font-weight:600;
  transition:all .2s var(--ease);
  cursor:pointer;white-space:nowrap;
}
.btn svg { flex-shrink:0 }
.btn-primary {
  background:linear-gradient(135deg,var(--teal-500),var(--teal-700));
  color:#fff;
  box-shadow:0 4px 16px rgba(21,116,112,.28);
}
.btn-primary:hover { transform:translateY(-1px);box-shadow:0 8px 24px rgba(21,116,112,.38) }
.btn-ghost {
  background:rgba(15,42,42,.04);
  border:1px solid var(--line-2);
  color:var(--ink-700);
}
.btn-ghost:hover { background:rgba(15,42,42,.08) }
.btn-coral {
  background:linear-gradient(135deg,var(--clay-500),var(--clay-700));
  color:#fff;
  box-shadow:0 4px 16px rgba(160,90,66,.25);
}
.btn-coral:hover { transform:translateY(-1px);box-shadow:0 8px 24px rgba(160,90,66,.35) }

/* ── EYEBROW / SECTION HEAD ── */
.eyebrow {
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  color:var(--teal-700);letter-spacing:.14em;text-transform:uppercase;
  margin-bottom:18px;
}
.dot {
  width:6px;height:6px;border-radius:50%;
  background:var(--teal-500);
  box-shadow:0 0 10px rgba(46,163,156,.6);
  animation:pulse 2s ease-in-out infinite;
}
.section-head { margin-bottom:48px;max-width:780px }
.section-head h2 { margin-bottom:14px }
.section-head p { color:var(--ink-600);font-size:16px }

/* ── CARDS ── */
.card {
  padding:28px 26px;border-radius:16px;
  background:var(--surface);
  border:1px solid var(--line);
  transition:transform .3s var(--ease),box-shadow .3s,border-color .3s;
}
.card:hover {
  transform:translateY(-3px);
  box-shadow:0 20px 40px -20px rgba(15,42,42,.14);
  border-color:var(--line-2);
}
.card.coral {
  border-color:rgba(208,131,102,.25);
  background:linear-gradient(180deg,rgba(208,131,102,.04),var(--surface));
}
.card .ic {
  width:42px;height:42px;border-radius:10px;
  background:rgba(46,163,156,.10);
  border:1px solid rgba(46,163,156,.25);
  display:grid;place-items:center;color:var(--teal-700);
  margin-bottom:18px;flex-shrink:0;
}
.card.coral .ic { background:rgba(208,131,102,.10);border-color:rgba(208,131,102,.3);color:var(--clay-700) }
.card h3 { margin-bottom:10px }
.card p  { font-size:14px;line-height:1.65 }

/* ── GRID ── */
.grid-3 { display:grid;grid-template-columns:repeat(3,1fr);gap:20px }
@media(max-width:900px) { .grid-3 { grid-template-columns:1fr 1fr } }
@media(max-width:580px) { .grid-3 { grid-template-columns:1fr } }

/* ── METRIC ── */
.metric {
  position:relative;
  padding:24px 22px;border-radius:16px;
  background:#FFFFFF;
  border:1px solid var(--line);
  transition:transform .25s var(--ease),border-color .25s,box-shadow .25s;
}
.metric:hover{transform:translateY(-2px);border-color:var(--teal-400);box-shadow:0 14px 30px -18px rgba(15,42,42,.15)}
.metric .v {
  font-size:38px;font-weight:800;
  color:var(--ink-900);letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;
  line-height:1;margin-bottom:10px;
}
.metric .v small { font-size:18px;font-weight:700;color:var(--teal-700);margin-left:2px }
.metric .l { font-size:12px;color:var(--ink-500);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;line-height:1.5 }
.metric .l span{display:block;font-family:'Noto Sans TC',sans-serif;font-size:13px;color:var(--ink-700);text-transform:none;letter-spacing:0;margin-top:4px;font-weight:500}

/* ── FADE-UP ANIMATION ── */
.fade-up {
  opacity:0;
  transform:translateY(28px);
  transition:opacity .65s var(--ease),transform .65s var(--ease);
}
.fade-up.visible {
  opacity:1;
  transform:translateY(0);
}

/* ── FOOTER ── */
.ts-footer {
  background:var(--ink-900);
  color:rgba(255,255,255,.55);
  padding:60px 0 36px;
  margin-top:80px;
}
.ts-footer .ts-logo { color:#fff }
.ts-footer .ts-logo-mark { background:rgba(255,255,255,.12);box-shadow:none }
.foot-grid {
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  margin-bottom:48px;
}
@media(max-width:860px) { .foot-grid { grid-template-columns:1fr 1fr } }
@media(max-width:500px) { .foot-grid { grid-template-columns:1fr } }
.foot-tag { font-size:13px;color:rgba(255,255,255,.35);margin-top:14px;line-height:1.7 }
.ts-footer h5 { color:rgba(255,255,255,.5);font-size:11px;margin-bottom:14px }
.ts-footer ul li { margin-bottom:10px }
.ts-footer ul a { font-size:14px;color:rgba(255,255,255,.45);transition:color .2s }
.ts-footer ul a:hover { color:#fff }
.ts-footer ul li { font-size:14px;color:rgba(255,255,255,.35) }
.foot-bottom {
  border-top:1px solid rgba(255,255,255,.06);
  padding-top:24px;
  display:flex;gap:24px;flex-wrap:wrap;
  font-size:12px;color:rgba(255,255,255,.25);
}

/* ── AUTH MODAL ── */
#ts-auth-overlay {
  position:fixed;inset:0;background:rgba(7,14,20,.88);
  backdrop-filter:blur(12px);z-index:500;
  display:none;place-items:center;padding:24px;
}
#ts-auth-overlay.open { display:grid }
#ts-auth-card {
  position:relative;max-width:400px;width:100%;
  background:linear-gradient(180deg,#0F1828,#0A1020);
  border:1px solid rgba(255,255,255,.1);border-radius:20px;
  padding:36px 32px;color:#fff;
  animation:fadeIn .3s var(--ease);
}
#ts-auth-card .ts-logo { margin-bottom:24px }
#ts-auth-card h3 { font-size:22px;margin-bottom:8px;color:#fff }
#ts-auth-card > p { color:rgba(255,255,255,.5);font-size:14px;margin-bottom:24px }
#ts-auth-card input,
#ts-auth-card select {
  width:100%;padding:11px 14px;border-radius:10px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);
  color:#fff;font:inherit;font-size:14px;margin-bottom:12px;
  outline:none;transition:border-color .2s;
  -webkit-appearance:none;
}
#ts-auth-card input::placeholder { color:rgba(255,255,255,.3) }
#ts-auth-card input:focus,
#ts-auth-card select:focus { border-color:rgba(46,163,156,.5) }
#ts-auth-card select { margin-bottom:20px }
#ts-auth-card select option { background:#0F1828;color:#fff }
.ts-auth-btns { display:flex;gap:10px }
.ts-auth-btns .btn { flex:1;justify-content:center }
.ts-auth-close {
  position:absolute;top:14px;right:14px;
  width:32px;height:32px;border-radius:8px;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.5);
  display:grid;place-items:center;cursor:pointer;
  transition:background .2s;
}
.ts-auth-close:hover { background:rgba(255,255,255,.14);color:#fff }

/* Auth chip in nav */
[data-auth-slot] .ts-user-chip {
  display:flex;align-items:center;gap:8px;
  padding:6px 12px 6px 6px;border-radius:10px;
  background:rgba(46,163,156,.1);border:1px solid rgba(46,163,156,.2);
  font-size:13px;font-weight:600;color:var(--teal-700);cursor:pointer;
  transition:all .2s;
}
[data-auth-slot] .ts-user-chip:hover { background:rgba(46,163,156,.18) }
[data-auth-slot] .ts-user-chip .av {
  width:26px;height:26px;border-radius:6px;
  background:linear-gradient(135deg,var(--teal-600),var(--teal-800));
  color:#fff;font-size:10px;font-weight:800;
  display:grid;place-items:center;
}
[data-auth-slot] .ts-signin-btn {
  padding:7px 16px;border-radius:9px;font-size:13px;font-weight:600;
  background:var(--teal-500);color:#fff;cursor:pointer;
  box-shadow:0 3px 12px rgba(21,116,112,.25);
  transition:all .2s;
}
[data-auth-slot] .ts-signin-btn:hover { background:var(--teal-600) }

/* ── KEYFRAMES ── */
@keyframes pulse {
  0%,100% { opacity:1;transform:scale(1) }
  50%      { opacity:.6;transform:scale(1.3) }
}
@keyframes fadeIn {
  from { opacity:0;transform:translateY(12px) }
  to   { opacity:1;transform:translateY(0) }
}

/* ── SECTION SCROLL OFFSET ── */
section[id] { scroll-margin-top:calc(var(--nav-h) + 20px) }

/* ── RESPONSIVE ── */
@media(max-width:640px) {
  section { padding:56px 0 }
  .container { padding:0 20px }
  .ts-nav-inner { padding:0 16px;gap:12px }
  .ts-nav-links { display:none }
  .ts-nav-cta { gap:8px }
  .ts-lang button { padding:4px 8px }
  .ts-nav-cta .btn-sm { padding:8px 10px!important;font-size:12px!important }
  h1 { font-size:32px }
  h2 { font-size:26px }
}

@media(max-width:420px) {
  .ts-nav-cta .btn-sm { display:none }
}

/* ── PRODUCT SHOWCASE ── */
.product-showcase { background:linear-gradient(180deg,#FFFFFF,#F4F1EC) }
.ps-grid {
  display:grid;grid-template-columns:1.05fr 1fr;gap:24px;
  margin-top:36px;
}
@media(max-width:920px){.ps-grid{grid-template-columns:1fr}}
.ps-side { display:flex;flex-direction:column;gap:24px }

.ps-card {
  position:relative;overflow:hidden;border-radius:20px;
  background:#0A1628;border:1px solid var(--line-2);
  box-shadow:0 18px 50px -28px rgba(15,42,42,.25);
}
.ps-card img {
  display:block;width:100%;height:100%;object-fit:cover;
  transition:transform .8s var(--ease);
}
.ps-card:hover img { transform:scale(1.03) }

.ps-card--exploded {
  background:#FFFFFF;
  display:flex;flex-direction:column;
  min-height:520px;
}
.ps-card--exploded img {
  flex:1;min-height:0;object-fit:contain;padding:32px 0 12px;
  background:linear-gradient(180deg,#FFFFFF,#F8F6F2);
}
.ps-card--use { aspect-ratio:16/11 }

.ps-card-meta {
  padding:20px 24px;
  background:linear-gradient(180deg,rgba(10,22,40,0),rgba(10,22,40,.92));
  position:absolute;left:0;right:0;bottom:0;
  color:#fff;
}
.ps-card--exploded .ps-card-meta {
  position:relative;background:#FFFFFF;color:var(--ink-900);
  border-top:1px solid var(--line);
}
.ps-card-eyebrow {
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--teal-500);margin-bottom:6px;
}
.ps-card--exploded .ps-card-eyebrow { color:var(--teal-700) }
.ps-card-title { font-size:20px;font-weight:700;line-height:1.3;margin-bottom:6px }
.ps-card-text { font-size:13.5px;line-height:1.55;color:rgba(255,255,255,.78);max-width:46ch }
.ps-card--exploded .ps-card-text { color:var(--ink-600) }

.ps-spec {
  background:#FFFFFF;border:1px solid var(--line-2);border-radius:20px;
  padding:6px 22px;
}
.ps-spec-row {
  display:flex;justify-content:space-between;align-items:center;
  padding:14px 0;border-top:1px solid var(--line);
  font-size:13px;
}
.ps-spec-row:first-child { border-top:0 }
.ps-spec-k { font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--ink-500) }
.ps-spec-v { color:var(--ink-900);font-weight:600 }

/* ── ZH-CN LANGUAGE ── */
body[data-lang="zh-CN"] [data-lang-key="en"] { display:none!important }

/* ── COOKIE BANNER ── */
#ts-cookie-banner {
  position:fixed;bottom:0;left:0;right:0;z-index:400;
  padding:16px;
  transform:translateY(100%);
  transition:transform .38s cubic-bezier(.4,0,.2,1);
}
#ts-cookie-banner.tsc-in { transform:translateY(0) }

.tsc-wrap {
  max-width:720px;margin:0 auto;
  background:#0B1628;border:1px solid rgba(27,138,132,.35);
  border-radius:14px;padding:20px 24px;
  display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  box-shadow:0 -4px 32px rgba(0,0,0,.45);
}
.tsc-body { flex:1;min-width:220px }
.tsc-title { font-weight:700;font-size:15px;color:#e2e8f0;margin:0 0 4px }
.tsc-desc  { font-size:13px;color:#94a3b8;margin:0;line-height:1.5 }

.tsc-cats {
  display:none;flex-direction:column;gap:10px;
  margin-top:12px;border-top:1px solid rgba(255,255,255,.08);padding-top:12px;
}
.tsc-cat {
  display:flex;align-items:center;gap:10px;cursor:pointer;
  font-size:13px;color:#cbd5e1;
}
.tsc-cat-l { flex:1 }
.tsc-alw   { font-size:11px;color:#1B8A84;margin-right:4px }

/* toggle switch */
.tsc-cat input[type=checkbox] { display:none }
.tsc-tog {
  width:36px;height:20px;background:#334155;border-radius:10px;
  position:relative;transition:background .2s;flex-shrink:0;
}
.tsc-tog::after {
  content:'';position:absolute;top:3px;left:3px;
  width:14px;height:14px;border-radius:50%;background:#fff;
  transition:transform .2s;
}
.tsc-cat input:checked + .tsc-tog { background:#1B8A84 }
.tsc-cat input:checked + .tsc-tog::after { transform:translateX(16px) }
.tsc-cat input:disabled + .tsc-tog { background:#1B8A84;opacity:.7;cursor:not-allowed }
.tsc-cat input:disabled + .tsc-tog::after { transform:translateX(16px) }

.tsc-actions {
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  flex-shrink:0;
}
.tsc-btn { font-size:13px;padding:8px 16px;white-space:nowrap }
.tsc-link {
  background:none!important;border:none!important;
  color:#94a3b8!important;text-decoration:underline;padding:8px 4px;
}
.tsc-link:hover { color:#e2e8f0!important }
.tsc-policy {
  display:block;width:100%;text-align:center;
  font-size:12px;color:#64748b;margin-top:4px;
}
.tsc-policy:hover { color:#94a3b8 }

@media(max-width:640px) {
  .tsc-wrap { flex-direction:column;align-items:stretch;gap:12px }
  .tsc-actions { justify-content:stretch }
  .tsc-btn { flex:1;text-align:center }
}

/* ── A11Y / MOBILE ── */
/* 行動裝置 / 觸控不顯示 cursor glow（無滑鼠指標可追） */
@media (pointer: coarse) {
  .cursor-glow { display:none!important }
}
/* 尊重使用者「減少動態」設定：停用裝飾性動畫與 fade-up 過渡 */
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after {
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  .fade-up { opacity:1!important;transform:none!important }
  .cursor-glow { display:none!important }
}