/* =========================================================
   弘名鋼模 — NEO edition
   Dark-first industrial / precision-tech visual system
   ========================================================= */

/* ===== Tokens =====
   淺色為預設（手機主要瀏覽情境），深色為 opt-in 覆蓋。
   文字色皆通過 WCAG AA（小字 ≥ 4.5:1）。 */
:root, [data-theme="light"] {
  color-scheme: light;

  --bg:            #f4f6f9;
  --bg-2:          #ffffff;
  --surface:       rgba(15,23,36,.04);
  --surface-2:     rgba(255,255,255,.92);
  --line:          rgba(15,23,36,.14);
  --line-strong:   rgba(15,23,36,.26);

  --text:          #0f1720;   /* 15.9:1 */
  --muted:         #4d5868;   /*  6.4:1 */
  --faint:         #5f6b7a;   /*  4.8:1 */

  --steel:         #15628f;   /*  5.8:1 — precision blue */
  --steel-soft:    #2f93d6;
  --copper:        #b4560f;   /* warm accent */
  --copper-soft:   #d97a2e;

  /* 白字在此漸層上 ≥ 4.6:1 */
  --grad: linear-gradient(100deg, #1f7ab5 0%, #15628f 36%, #4a35b0 64%, #9c4a0d 100%);
  --glow-steel:  0 0 0 1px rgba(21,98,143,.22), 0 14px 40px -16px rgba(21,98,143,.45);
  --glow-copper: 0 0 0 1px rgba(180,86,15,.22), 0 14px 40px -16px rgba(180,86,15,.40);

  --shadow-1: 0 2px 10px rgba(16,24,38,.08);
  --shadow-2: 0 18px 46px -20px rgba(16,24,38,.26);
  --shadow-3: 0 40px 90px -34px rgba(16,24,38,.32);

  --r-sm: 8px; --r-md: 14px; --r-lg: 22px; --r-xl: 30px; --r-full: 999px;

  --shell: 1240px;
  --ease: cubic-bezier(.16,1,.3,1);
  --dur: .55s;

  --font-en: 'Space Grotesk', system-ui, sans-serif;
  --font-zh: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  --font-display: 'Noto Serif TC', 'Songti TC', serif;

  /* 手機端最小值調高，小螢幕不再出現 11px 級的標籤字 */
  --t-xs: clamp(.75rem,.71rem + .2vw,.84rem);
  --t-sm: clamp(.88rem,.84rem + .25vw,.97rem);
  --t-base: clamp(1rem,.96rem + .25vw,1.1rem);
  --t-lg: clamp(1.15rem,1rem + .7vw,1.45rem);
  --t-h3: clamp(1.2rem,1.02rem + .8vw,1.55rem);
  --t-h2: clamp(1.95rem,1.35rem + 2.6vw,3.6rem);
  --t-h1: clamp(2.35rem,1.4rem + 4.6vw,5.4rem);
}

[data-theme="dark"] {
  color-scheme: dark;

  /* 提亮底色：原 #07090c 近純黑，小字對比僅 3.4:1 */
  --bg:            #0d1117;
  --bg-2:          #121924;
  --surface:       rgba(255,255,255,.05);
  --surface-2:     rgba(255,255,255,.08);
  --line:          rgba(255,255,255,.13);
  --line-strong:   rgba(255,255,255,.24);

  --text:          #e9edf3;   /* 14.8:1 */
  --muted:         #a3adbb;   /*  8.3:1 */
  --faint:         #7a8696;   /*  5.1:1 — 原 #5b6675 只有 3.4:1 */

  --steel:         #59b6f0;
  --steel-soft:    #a9dcff;
  --copper:        #ff9147;
  --copper-soft:   #ffc79b;

  --grad: linear-gradient(100deg, var(--steel-soft) 0%, var(--steel) 34%, #b48cff 62%, var(--copper) 100%);
  --glow-steel:  0 0 0 1px rgba(89,182,240,.30), 0 12px 40px -12px rgba(89,182,240,.55);
  --glow-copper: 0 0 0 1px rgba(255,145,71,.30), 0 12px 40px -12px rgba(255,145,71,.50);

  --shadow-1: 0 1px 3px rgba(0,0,0,.35);
  --shadow-2: 0 18px 50px -18px rgba(0,0,0,.70);
  --shadow-3: 0 40px 90px -30px rgba(0,0,0,.80);
}

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
  -webkit-font-smoothing: antialiased;
  text-size-adjust: 100%;
}
body {
  min-height: 100dvh;
  font-family: var(--font-zh);
  font-size: var(--t-base);
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  transition: background .5s var(--ease), color .5s var(--ease);
}
body.is-loading { overflow: hidden; }
body.nav-open { overflow: hidden; }
img, svg, iframe, canvas { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
ul[role="list"] { list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
h1, h2, h3, h4 { line-height: 1.18; text-wrap: balance; font-weight: 700; }
p { text-wrap: pretty; }
::selection { background: var(--steel); color: #04070b; }
:focus-visible { outline: 2px solid var(--steel); outline-offset: 3px; border-radius: 6px; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; }

.shell { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: clamp(1.15rem, 4vw, 2.5rem); }

/* ===== Preloader ===== */
.loader {
  position: fixed; inset: 0; z-index: 999;
  display: grid; place-items: center;
  background: radial-gradient(120% 90% at 50% 40%, #101722 0%, #05070a 70%);
  color: var(--steel);
  transition: opacity .7s var(--ease), visibility .7s;
}
.loader.done { opacity: 0; visibility: hidden; }
.loader-inner { display: grid; justify-items: center; gap: .9rem; text-align: center; }
.loader-gear { width: 92px; height: 92px; }
.loader-gear svg { width: 100%; height: 100%; }
.gear-ring { transform-origin: 50% 50%; animation: spin 5s linear infinite; }
.gear-ring--rev { animation: spin 9s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.loader-word {
  font-family: var(--font-en); font-weight: 700; letter-spacing: .34em;
  font-size: clamp(1.1rem, 3.2vw, 1.7rem);
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.loader-sub { font-size: var(--t-xs); letter-spacing: .28em; color: var(--faint); }
.loader-bar { width: min(240px, 60vw); height: 2px; background: rgba(255,255,255,.1); border-radius: 2px; overflow: hidden; }
.loader-bar i { display: block; height: 100%; width: 0%; background: var(--grad); box-shadow: 0 0 14px rgba(89,182,240,.9); }
.loader-pct { font-family: var(--font-en); font-size: var(--t-xs); letter-spacing: .2em; color: var(--muted); }
.loader-pct small { opacity: .5; }

/* ===== Ambient layers ===== */
.grain {
  position: fixed; inset: 0; z-index: 400; pointer-events: none; opacity: .14; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}
[data-theme="dark"] .grain { opacity: .30; }

.spotlight {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(340px circle at var(--mx, 50%) var(--my, 25%), rgba(21,98,143,.10), transparent 62%);
  transition: opacity .4s;
}
[data-theme="dark"] .spotlight { background: radial-gradient(360px circle at var(--mx,50%) var(--my,25%), rgba(89,182,240,.14), transparent 62%); }

.scroll-progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 300; background: transparent; }
.scroll-progress i { display: block; height: 100%; width: 0%; background: var(--grad); box-shadow: 0 0 12px rgba(89,182,240,.7); }

/* ===== Header ===== */
.header {
  position: sticky; top: 0; z-index: 200;
  border-bottom: 1px solid transparent;
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s;
}
.header.stuck {
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom-color: var(--line);
}
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 1rem; }

.brand { display: flex; align-items: center; gap: .8rem; }
.brand-mark { width: 42px; height: 42px; color: var(--steel); flex: 0 0 auto; filter: drop-shadow(0 0 12px rgba(89,182,240,.45)); transition: transform .5s var(--ease); }
.brand:hover .brand-mark { transform: rotate(-8deg) scale(1.06); }
.brand-text { display: grid; line-height: 1.15; }
.brand-text b { font-family: var(--font-display); font-size: 1.15rem; letter-spacing: .06em; }
.brand-text i { font-family: var(--font-en); font-style: normal; font-size: .58rem; letter-spacing: .24em; color: var(--faint); }

.nav { position: relative; display: none; gap: .2rem; padding: .3rem; border: 1px solid var(--line); border-radius: var(--r-full); background: var(--surface); }
@media (min-width: 940px) { .nav { display: flex; } }
.nav-link { position: relative; z-index: 1; padding: .5rem 1rem; border-radius: var(--r-full); font-size: var(--t-sm); color: var(--muted); transition: color .3s var(--ease); }
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-pill { position: absolute; z-index: 0; top: .3rem; bottom: .3rem; left: 0; width: 0; border-radius: var(--r-full); background: var(--surface-2); border: 1px solid var(--line); opacity: 0; transition: transform .45s var(--ease), width .45s var(--ease), opacity .3s; }

.header-actions { display: flex; align-items: center; gap: .55rem; }
.icon-btn {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: var(--r-full);
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  transition: border-color .3s, background .3s, transform .3s var(--ease);
}
.icon-btn:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.menu-btn { display: grid; gap: 4px; align-content: center; justify-items: center; }
@media (min-width: 940px) { .menu-btn { display: none; } .header-actions .btn-sm { display: inline-flex; } }
.menu-btn span { display: block; width: 16px; height: 1.6px; background: currentColor; border-radius: 2px; transition: transform .35s var(--ease), opacity .25s; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.6px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.6px) rotate(-45deg); }
@media (max-width: 939px) { .header-actions .btn-sm { display: none; } }

.mobile-nav {
  display: grid; overflow: hidden;
  max-height: 0; opacity: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: max-height .5s var(--ease), opacity .35s var(--ease), border-color .3s;
}
.mobile-nav.open { max-height: 340px; opacity: 1; border-bottom-color: var(--line); }
.mobile-nav a {
  padding: .95rem clamp(1.15rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
  font-size: var(--t-sm); color: var(--muted);
}
.mobile-nav a:hover { color: var(--text); background: var(--surface); }

/* ===== Buttons ===== */
.btn {
  position: relative; display: inline-flex; align-items: center; gap: .5rem;
  padding: .85rem 1.5rem; border-radius: var(--r-full);
  font-size: var(--t-sm); font-weight: 500; letter-spacing: .04em;
  border: 1px solid transparent; overflow: hidden; will-change: transform;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background .35s, color .35s, border-color .35s;
}
.btn-sm { padding: .55rem 1.1rem; font-size: var(--t-xs); }
.btn-glow { background: var(--grad); background-size: 200% 100%; color: #fff; box-shadow: var(--glow-steel); font-weight: 700; }
[data-theme="dark"] .btn-glow { color: #05080d; }  /* 深色主題的漸層是亮色，需反轉字色 */
.btn-glow:hover { background-position: 100% 0; box-shadow: 0 0 0 1px rgba(89,182,240,.5), 0 20px 50px -14px rgba(89,182,240,.7); }
.btn-glow svg { transition: transform .35s var(--ease); }
.btn-glow:hover svg { transform: translateX(4px); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--steel); color: var(--steel); box-shadow: var(--glow-steel); }

/* ===== Hero ===== */
.hero {
  position: relative; isolation: isolate;
  padding-block: clamp(3.5rem, 9vh, 7rem) clamp(4rem, 11vh, 8rem);
  overflow: hidden;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -3; opacity: .75; }
.hero-grid {
  position: absolute; inset: -20% -10% 0; z-index: -4;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 74px 74px;
  mask-image: radial-gradient(90% 70% at 50% 30%, #000 10%, transparent 78%);
  -webkit-mask-image: radial-gradient(90% 70% at 50% 30%, #000 10%, transparent 78%);
  animation: gridDrift 26s linear infinite;
}
@keyframes gridDrift { to { background-position: 74px 74px, 74px 74px; } }
.hero-orb { position: absolute; z-index: -5; border-radius: 50%; filter: blur(90px); opacity: .55; }
.hero-orb--a { width: 44vw; height: 44vw; max-width: 620px; max-height: 620px; top: -14%; right: -8%; background: radial-gradient(circle, rgba(47,147,214,.34), transparent 66%); animation: float1 16s ease-in-out infinite; }
.hero-orb--b { width: 36vw; height: 36vw; max-width: 480px; max-height: 480px; bottom: -18%; left: -10%; background: radial-gradient(circle, rgba(217,122,46,.26), transparent 66%); animation: float2 20s ease-in-out infinite; }
[data-theme="dark"] .hero-orb--a { background: radial-gradient(circle, rgba(89,182,240,.55), transparent 66%); }
[data-theme="dark"] .hero-orb--b { background: radial-gradient(circle, rgba(255,145,71,.42), transparent 66%); }
@keyframes float1 { 50% { transform: translate3d(-4%, 6%, 0) scale(1.08); } }
@keyframes float2 { 50% { transform: translate3d(6%, -5%, 0) scale(1.12); } }

.hero-shell { display: grid; gap: clamp(2.5rem, 6vw, 4.5rem); align-items: center; }
@media (min-width: 1000px) { .hero-shell { grid-template-columns: 1.05fr .95fr; } }

.tagline {
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .45rem 1rem; border-radius: var(--r-full);
  border: 1px solid var(--line); background: var(--surface);
  font-size: var(--t-xs); letter-spacing: .1em; color: var(--muted);
  backdrop-filter: blur(8px);
}
.tagline .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--copper); box-shadow: 0 0 0 0 rgba(255,145,71,.6); animation: pulse 2.4s ease-out infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 9px rgba(255,145,71,0); } 100% { box-shadow: 0 0 0 0 rgba(255,145,71,0); } }

.hero-title {
  margin-top: 1.4rem;
  font-family: var(--font-display);
  font-size: var(--t-h1); font-weight: 900; letter-spacing: .01em; line-height: 1.08;
}
.hero-title .line { display: block; }
/* 整行一起進場，不拆字 —— background-clip:text 的漸層無法穿透帶 transform 的
   inline-block 子元素，拆成 .ch 會讓整行變成看不見的透明字 */
.hero-title .grad {
  background: var(--grad); background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  opacity: 0; transform: translateY(.45em);
  animation: lineIn .85s var(--ease) .18s forwards, shimmer 7s linear infinite;
}
@keyframes lineIn { to { opacity: 1; transform: none; } }
@keyframes shimmer { to { background-position: 220% 0; } }
.hero-title .ch { display: inline-block; opacity: 0; transform: translateY(.7em) rotateX(-55deg); transform-origin: 50% 100%; animation: chIn .8s var(--ease) forwards; animation-delay: var(--cd, 0s); }
@keyframes chIn { to { opacity: 1; transform: none; } }

.hero-lede { margin-top: 1.5rem; max-width: 48ch; color: var(--muted); font-size: var(--t-lg); line-height: 1.85; font-weight: 300; }
.hero-cta { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: .8rem; }

.hero-stats { margin-top: 2.8rem; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; border-top: 1px solid var(--line); padding-top: 1.6rem; }
.hero-stats .num { font-family: var(--font-en); font-size: clamp(1.7rem, 1rem + 2.4vw, 2.7rem); font-weight: 700; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats .num-text { font-family: var(--font-display); }
.hero-stats dd { margin-top: .5rem; font-size: var(--t-xs); letter-spacing: .12em; color: var(--faint); }

/* Media frame */
.hero-visual { position: relative; }
.frame {
  position: relative; overflow: hidden; border-radius: var(--r-lg);
  border: 1px solid var(--line); background: var(--surface);
  box-shadow: var(--shadow-3);
  transform-style: preserve-3d; will-change: transform;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.frame::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(160deg, rgba(47,147,214,.10), transparent 45%, rgba(217,122,46,.08));
}
/* screen 混色在淺色底會把照片洗白，只用於深色主題 */
[data-theme="dark"] .frame::after {
  background: linear-gradient(160deg, rgba(89,182,240,.18), transparent 42%, rgba(255,145,71,.14));
  mix-blend-mode: screen;
}
.frame img { width: 100%; aspect-ratio: 4/3; object-fit: cover; transition: transform .8s var(--ease), filter .6s; filter: saturate(1.05) contrast(1.04); }
.frame--tall img { aspect-ratio: 4/5; }
.frame:hover img { transform: scale(1.05); }
.frame-scan {
  position: absolute; left: 0; right: 0; height: 34%; top: -34%;
  background: linear-gradient(180deg, transparent, rgba(89,182,240,.20), transparent);
  animation: scan 5.5s var(--ease) infinite;
  pointer-events: none;
}
@keyframes scan { 0% { top: -40%; } 60%, 100% { top: 110%; } }
.frame-hud {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; justify-content: space-between; gap: 1rem;
  padding: .7rem 1rem;
  font-family: var(--font-en); font-size: .62rem; letter-spacing: .22em; color: #fff;
  background: linear-gradient(0deg, rgba(4,7,11,.8), transparent);
}
[data-theme="dark"] .frame-hud { color: var(--steel-soft); }

.float-chip {
  position: absolute; padding: .5rem .9rem; border-radius: var(--r-full);
  font-family: var(--font-en); font-size: .68rem; letter-spacing: .16em;
  border: 1px solid var(--line-strong); color: var(--text);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(10px); box-shadow: var(--shadow-2);
}
.float-chip--1 { top: 8%; left: -4%; animation: bob 6s ease-in-out infinite; }
.float-chip--2 { bottom: 10%; right: -4%; animation: bob 7.5s ease-in-out infinite reverse; }
@keyframes bob { 50% { transform: translateY(-12px); } }

.scroll-hint {
  position: absolute; left: 50%; bottom: 1.2rem; transform: translateX(-50%);
  display: grid; justify-items: center; gap: .5rem;
  font-family: var(--font-en); font-size: .6rem; letter-spacing: .34em; color: var(--faint);
}
.scroll-hint span { display: block; width: 1px; height: 42px; background: linear-gradient(var(--steel), transparent); }
.scroll-hint span::after { content: ''; display: block; width: 3px; height: 3px; margin-left: -1px; border-radius: 50%; background: var(--steel); animation: drop 2.2s var(--ease) infinite; }
@keyframes drop { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(40px); opacity: 0; } }
@media (max-width: 999px) { .scroll-hint { display: none; } }

/* ===== Marquee ===== */
.marquee {
  position: relative; overflow: hidden; padding-block: 1.1rem;
  border-block: 1px solid var(--line);
  background: linear-gradient(90deg, transparent, var(--surface), transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track { display: flex; align-items: center; gap: 2.2rem; width: max-content; animation: slide 34s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span { font-size: var(--t-sm); letter-spacing: .14em; color: var(--muted); white-space: nowrap; }
/* 只針對分隔符 — 舊的 [aria-hidden] 選擇器會把複製那half的客戶名也縮成 8px */
.marquee-track .sep { color: var(--steel); font-size: .55rem; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ===== Sections ===== */
.section { position: relative; padding-block: clamp(4.5rem, 12vh, 9rem); }
.section--alt { background: linear-gradient(180deg, transparent, var(--bg-2) 18%, var(--bg-2) 82%, transparent); }
.section-head { max-width: 760px; margin-bottom: clamp(2.5rem, 6vw, 4rem); }
.eyebrow { display: inline-flex; align-items: center; gap: .6rem; font-family: var(--font-en); font-size: var(--t-xs); letter-spacing: .3em; text-transform: uppercase; color: var(--steel); }
.eyebrow i { display: block; width: 26px; height: 1px; background: currentColor; }
.h2 { margin-top: .9rem; font-family: var(--font-display); font-size: var(--t-h2); font-weight: 900; letter-spacing: .01em; }
.h2 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-lede { margin-top: 1.1rem; color: var(--muted); max-width: 56ch; font-weight: 300; }

/* ===== About ===== */
.about { display: grid; gap: clamp(2.5rem, 6vw, 4.5rem); align-items: center; }
@media (min-width: 940px) { .about { grid-template-columns: .85fr 1.15fr; } }
.about-media { position: relative; }
.year-badge {
  position: absolute; right: -.75rem; bottom: -1.5rem;
  display: grid; justify-items: center; gap: .1rem;
  padding: 1.1rem 1.4rem; border-radius: var(--r-md);
  border: 1px solid var(--line-strong); box-shadow: var(--shadow-2);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
}
.year-badge b { font-family: var(--font-en); font-size: 1.9rem; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.year-badge span { font-size: var(--t-xs); letter-spacing: .18em; color: var(--faint); }
.about-copy p { margin-top: 1.2rem; color: var(--muted); font-weight: 300; }

.spec-grid { margin-top: 2.2rem; display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1px; border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; background: var(--line); }
.spec { display: grid; gap: .25rem; padding: 1rem 1.15rem; background: var(--bg); transition: background .35s, transform .35s var(--ease); }
.spec:hover { background: var(--surface-2); }
.spec--wide { grid-column: 1 / -1; }
.spec span { font-size: var(--t-xs); letter-spacing: .16em; color: var(--faint); }
.spec b { font-weight: 500; font-size: var(--t-sm); }

/* ===== Philosophy ===== */
.phil { display: grid; gap: clamp(2rem, 5vw, 3.5rem); }
@media (min-width: 940px) { .phil { grid-template-columns: 1.25fr .75fr; align-items: start; } }
.phil-list { list-style: none; display: grid; gap: 1rem; }
.phil-item {
  position: relative; display: grid; grid-template-columns: auto 1fr; gap: 1.4rem;
  padding: 1.6rem clamp(1.2rem, 3vw, 2rem);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--surface); overflow: hidden;
  transition: border-color .45s var(--ease), transform .45s var(--ease), box-shadow .45s var(--ease);
}
.phil-item::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--grad); transform: scaleY(0); transform-origin: top; transition: transform .55s var(--ease);
}
.phil-item:hover { border-color: var(--line-strong); transform: translateX(6px); box-shadow: var(--shadow-2); }
.phil-item:hover::before { transform: scaleY(1); }
.phil-num { font-family: var(--font-en); font-size: 2.1rem; font-weight: 700; line-height: 1; color: transparent; -webkit-text-stroke: 1px var(--line-strong); transition: color .45s; }
.phil-item:hover .phil-num { color: var(--steel); -webkit-text-stroke-color: transparent; }
.phil-body h3 { font-family: var(--font-display); font-size: var(--t-h3); }
.phil-body p { margin-top: .55rem; color: var(--muted); font-size: var(--t-sm); font-weight: 300; }

.phil-card {
  position: relative; overflow: hidden;
  padding: clamp(1.8rem, 4vw, 2.6rem);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background:
    radial-gradient(120% 80% at 80% 0%, rgba(89,182,240,.16), transparent 60%),
    radial-gradient(90% 70% at 10% 100%, rgba(255,145,71,.14), transparent 60%),
    var(--surface);
  box-shadow: var(--shadow-2);
}
.phil-quote { font-family: var(--font-display); font-size: clamp(1.7rem, 1rem + 2.4vw, 2.6rem); font-weight: 900; line-height: 1.25; }
.phil-quote em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.phil-card p { margin-top: 1.1rem; color: var(--muted); font-size: var(--t-sm); font-weight: 300; }
.phil-badge { margin-top: 1.6rem; display: inline-flex; align-items: center; gap: .55rem; padding: .45rem 1rem; border-radius: var(--r-full); border: 1px solid var(--line-strong); font-family: var(--font-en); font-size: var(--t-xs); letter-spacing: .22em; }
.phil-badge span { width: 6px; height: 6px; border-radius: 50%; background: var(--copper); box-shadow: 0 0 10px var(--copper); }

/* ===== Product cards ===== */
.cards { display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.card {
  position: relative; overflow: hidden; isolation: isolate;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--surface);
  transform-style: preserve-3d; will-change: transform;
  transition: transform .5s var(--ease), border-color .45s, box-shadow .5s var(--ease);
}
.card:hover { border-color: var(--line-strong); box-shadow: var(--shadow-3); }
.card-media { position: relative; overflow: hidden; }
.card-media::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, color-mix(in srgb, var(--bg) 85%, transparent)); }
.card-media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; transition: transform .8s var(--ease), filter .6s; }
.card:hover .card-media img { transform: scale(1.07); filter: saturate(1.15); }
.card-body { position: relative; padding: 1.4rem clamp(1.2rem, 3vw, 1.7rem) 1.8rem; }
.chip { display: inline-block; padding: .3rem .75rem; border-radius: var(--r-full); border: 1px solid var(--line-strong); font-size: var(--t-xs); letter-spacing: .14em; color: var(--steel); }
.card-body h3 { margin-top: .9rem; font-family: var(--font-display); font-size: var(--t-h3); }
.card-body p { margin-top: .6rem; color: var(--muted); font-size: var(--t-sm); font-weight: 300; }
.card-sheen {
  position: absolute; inset: 0; z-index: 2; pointer-events: none; opacity: 0;
  background: radial-gradient(240px circle at var(--px, 50%) var(--py, 50%), rgba(21,98,143,.12), transparent 60%);
  transition: opacity .4s;
}
.card:hover .card-sheen { opacity: 1; }
[data-theme="dark"] .card-sheen { background: radial-gradient(240px circle at var(--px,50%) var(--py,50%), rgba(255,255,255,.16), transparent 60%); }

/* ===== Contact ===== */
.contact { display: grid; gap: clamp(2.5rem, 6vw, 4rem); align-items: center; }
@media (min-width: 940px) { .contact { grid-template-columns: 1fr 1fr; } }
.contact-list { margin-top: 2.2rem; display: grid; gap: .8rem; }
.contact-item {
  display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 1rem;
  padding: 1rem 1.2rem; border: 1px solid var(--line); border-radius: var(--r-md);
  background: var(--surface);
  transition: border-color .35s, transform .4s var(--ease), box-shadow .4s var(--ease);
}
a.contact-item:hover { border-color: var(--steel); transform: translateY(-3px); box-shadow: var(--glow-steel); }
.contact-ico { display: grid; place-items: center; width: 42px; height: 42px; border-radius: var(--r-full); background: var(--surface-2); border: 1px solid var(--line); color: var(--steel); }
.contact-ico svg { width: 19px; height: 19px; }
.contact-item small { display: block; font-size: var(--t-xs); letter-spacing: .16em; color: var(--faint); }
.contact-item b { font-weight: 500; font-size: var(--t-sm); }

.map { position: relative; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-3); }
.map iframe { width: 100%; height: clamp(320px, 46vh, 470px); border: 0; filter: grayscale(.35) contrast(1.05); }
[data-theme="dark"] .map iframe { filter: invert(.92) hue-rotate(185deg) saturate(.75) contrast(.92); }

/* ===== Footer ===== */
.footer { position: relative; padding-top: clamp(3.5rem, 8vh, 5.5rem); padding-bottom: 2rem; border-top: 1px solid var(--line); overflow: hidden; }
.footer-top { display: grid; gap: 2.5rem; }
@media (min-width: 800px) { .footer-top { grid-template-columns: 1fr 1fr; } }
.footer-brand { font-family: var(--font-display); font-size: 1.6rem; font-weight: 900; }
.footer-en { margin-top: .2rem; font-family: var(--font-en); font-size: .62rem; letter-spacing: .28em; color: var(--faint); }
.footer-tag { margin-top: 1rem; color: var(--muted); font-size: var(--t-sm); font-weight: 300; }
.footer-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 2rem; }
.footer-cols h4 { font-size: var(--t-xs); letter-spacing: .22em; color: var(--steel); }
.footer-cols ul { margin-top: 1rem; display: grid; gap: .6rem; }
.footer-cols li { font-size: var(--t-sm); color: var(--muted); }
.footer-cols a { transition: color .3s, padding-left .3s var(--ease); }
.footer-cols a:hover { color: var(--text); padding-left: .3rem; }

.footer-wordmark {
  margin-top: clamp(2.5rem, 7vw, 4.5rem);
  font-family: var(--font-en); font-weight: 700;
  font-size: clamp(3rem, 14vw, 12rem); line-height: .85; letter-spacing: -.02em;
  text-align: center; color: transparent;
  background: linear-gradient(180deg, var(--line-strong), transparent 82%);
  -webkit-background-clip: text; background-clip: text;
  user-select: none;
}
.footer-bottom { margin-top: 1.5rem; padding-top: 1.4rem; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: .6rem 1.5rem; justify-content: space-between; font-size: var(--t-xs); color: var(--faint); }

/* ===== To top ===== */
.to-top {
  position: fixed; right: 1.2rem; bottom: 1.2rem; z-index: 210;
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: var(--r-full);
  border: 1px solid var(--line-strong); color: var(--text);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(12px); box-shadow: var(--shadow-2);
  opacity: 0; pointer-events: none; transform: translateY(14px) scale(.9);
  transition: opacity .4s var(--ease), transform .4s var(--ease), border-color .3s, box-shadow .3s;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { border-color: var(--steel); box-shadow: var(--glow-steel); }

/* ===== Scroll reveal ===== */
[data-anim] { opacity: 0; transition: opacity .9s var(--ease) var(--d, 0s), transform .9s var(--ease) var(--d, 0s), filter .9s var(--ease) var(--d, 0s); }
[data-anim="fade"] { transform: translateY(18px); }
[data-anim="rise"] { transform: translateY(46px) scale(.97); filter: blur(6px); }
[data-anim].in { opacity: 1; transform: none; filter: none; }

/* =========================================================
   手機調校 (< 768px)
   1. 壓低裝飾層 — 是「太暗／太糊」的主因，也最耗效能
   2. 觸控目標 ≥ 44px
   3. 縮小 blur 半徑 — backdrop-filter 在手機 GPU 上很貴
   ========================================================= */
@media (max-width: 767px) {
  .grain { opacity: .08; }
  [data-theme="dark"] .grain { opacity: .18; }
  .hero-orb { filter: blur(60px); opacity: .34; }
  .hero-canvas { opacity: .42; }
  .hero-grid { background-size: 56px 56px; }

  .hero { padding-block: 2.25rem 3.25rem; }
  .section { padding-block: clamp(3.25rem, 9vh, 5rem); }

  /* 觸控目標 */
  .icon-btn { width: 44px; height: 44px; }
  .mobile-nav a { padding-block: 1.05rem; }
  .contact-item { padding: 1.05rem 1.1rem; }
  .nav-link { padding: .65rem 1rem; }

  /* blur 減半 */
  .header.stuck, .mobile-nav { backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
  .float-chip, .year-badge, .to-top, .tagline { backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }

  .hero-title { margin-top: 1.15rem; }
  .hero-lede { margin-top: 1.15rem; line-height: 1.8; }
  .hero-cta { margin-top: 1.6rem; }
  .hero-cta .btn { flex: 1 1 auto; justify-content: center; }

  .hero-stats { margin-top: 2rem; padding-top: 1.25rem; gap: .5rem; }
  .hero-stats .num { font-size: 1.5rem; }
  .hero-stats dd { margin-top: .35rem; letter-spacing: .06em; }

  .float-chip { font-size: .62rem; padding: .4rem .7rem; }
  .float-chip--1 { left: 0; }
  .float-chip--2 { right: 0; }

  .year-badge { right: 0; bottom: -1rem; padding: .85rem 1.1rem; }
  .year-badge b { font-size: 1.5rem; }

  .phil-item { gap: 1rem; padding: 1.3rem 1.15rem; }
  .phil-num { font-size: 1.7rem; }
  .phil-item:hover { transform: none; }   /* 觸控裝置沒有 hover，避免點擊後卡住位移 */

  .spec { padding: .9rem 1.05rem; }
  .map iframe { height: 300px; }

  /* 小字下限：9px 級的英文標籤在手機上讀不了 */
  .brand-text i { font-size: .66rem; }
  .footer-en { font-size: .68rem; }
  .float-chip { font-size: .66rem; }
  .frame-hud { font-size: .66rem; }

  /* 頁尾連結原本只有 21px 高，撐不到可點擊的尺寸 */
  .footer-cols a { display: inline-block; padding-block: .5rem; }
  .footer-cols ul { gap: .2rem; }

  .to-top { right: .9rem; bottom: .9rem; width: 44px; height: 44px; }
  .footer-wordmark { margin-top: 2.25rem; }
  .footer-bottom { font-size: var(--t-xs); }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  [data-anim] { opacity: 1 !important; transform: none !important; filter: none !important; }
  .hero-title .ch { opacity: 1; transform: none; }
  .hero-title .grad { opacity: 1 !important; transform: none !important; }
  .marquee-track { animation: none; }
}