/* ═══════════════════════════════════════════════════
   有德塗造漆 — 工業檔案風
   紙感底 × 墨黑 × 鉛丹紅（防鏽底漆色）
   實測 Lab 數據當設計元素
   ═══════════════════════════════════════════════════ */
:root {
  --paper: #f4f1ea;        /* 溫紙感，不是死白 */
  --paper-dim: #ebe7dd;
  --ink: #16181d;          /* 墨黑 */
  --ink-soft: #4a4d55;
  --red: #e34714;          /* 鉛丹紅：防鏽底漆的顏色 */
  --red-deep: #b93409;
  --line: #d8d2c4;
  --dark: #14161a;
  --dark-2: #1c1f25;
  --dark-line: #2e323a;
  --dark-text: #c9ccd2;
  --serif: "Noto Serif TC", serif;
  --sans: "Noto Sans TC", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.85;
  font-size: 15.5px;
  /* 紙纖維紋理 */
  background-image:
    radial-gradient(rgba(22,24,29,0.028) 1px, transparent 1px);
  background-size: 5px 5px;
}

.wrap { max-width: 1140px; margin: 0 auto; padding: 0 28px; }

::selection { background: var(--red); color: var(--paper); }

/* ── 頁緣色帶（實測色值） ── */
.color-rule { display: flex; height: 6px; }
.color-rule span { flex: 1; }

/* ── Header ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(244,241,234,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1.5px solid var(--ink);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  text-decoration: none; color: var(--ink);
}
.brand-chip {
  width: 14px; height: 14px; align-self: center;
  background: var(--red);
  box-shadow: 3px 3px 0 var(--ink);
}
.brand-name {
  font-family: var(--serif); font-weight: 900; font-size: 19px;
  letter-spacing: 0.06em;
}
.brand-en {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  color: var(--ink-soft);
}
.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav a {
  color: var(--ink); text-decoration: none; font-size: 14.5px; font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: border-color .15s;
}
.main-nav a:hover { border-bottom-color: var(--red); }
.nav-cta {
  background: var(--ink); color: var(--paper) !important;
  padding: 7px 18px;
  transition: background .15s;
}
.nav-cta:hover { background: var(--red); border-bottom-color: transparent !important; }

/* ── Hero ── */
.hero {
  border-bottom: 1.5px solid var(--ink);
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
  padding-top: 84px;
  padding-bottom: 64px;
}
.kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.22em;
  color: var(--red-deep);
  margin-bottom: 22px;
}
.hero h1 {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(52px, 7.2vw, 88px);
  line-height: 1.18;
  letter-spacing: 0.02em;
}
.hero-sub {
  margin-top: 28px;
  font-size: 16.5px;
  color: var(--ink-soft);
}
.hero-actions { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  background: var(--red); color: var(--paper);
  font-weight: 700; font-size: 15px;
  padding: 14px 30px;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform .12s, box-shadow .12s;
}
.btn:hover { transform: translate(-2px,-2px); box-shadow: 6px 6px 0 var(--ink); }
.btn:active { transform: translate(2px,2px); box-shadow: 1px 1px 0 var(--ink); }
.btn-ghost {
  display: inline-block;
  color: var(--ink); font-weight: 500; font-size: 15px;
  padding: 14px 20px;
  text-decoration: none;
  border: 1.5px solid var(--ink);
  transition: background .15s, color .15s;
}
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

/* Hero 調色域（九原色攪漆暈染＋檔案卡框；下方文字待老大想好再加） */
.hero-gamut {
  border: 2px solid var(--ink);
  background: var(--paper);
  box-shadow: 6px 6px 0 var(--red), 13px 13px 0 var(--ink);
  transform: rotate(1.6deg);
  transition: transform .25s, box-shadow .25s;
  max-width: 400px; justify-self: end; width: 100%;
}
.hero-gamut:hover {
  transform: rotate(0deg);
  box-shadow: 4px 4px 0 var(--red), 9px 9px 0 var(--ink);
}
.gamut-frame {
  padding: 20px;
  background-color: var(--paper-dim);
  /* 印刷對位角標：四角 L 形墨線 */
  background-image:
    linear-gradient(var(--ink), var(--ink)), linear-gradient(var(--ink), var(--ink)),
    linear-gradient(var(--ink), var(--ink)), linear-gradient(var(--ink), var(--ink)),
    linear-gradient(var(--ink), var(--ink)), linear-gradient(var(--ink), var(--ink)),
    linear-gradient(var(--ink), var(--ink)), linear-gradient(var(--ink), var(--ink));
  background-repeat: no-repeat;
  background-size: 16px 2px, 2px 16px, 16px 2px, 2px 16px,
                   16px 2px, 2px 16px, 16px 2px, 2px 16px;
  background-position:
    left 7px top 7px, left 7px top 7px,
    right 7px top 7px, right 7px top 7px,
    left 7px bottom 7px, left 7px bottom 7px,
    right 7px bottom 7px, right 7px bottom 7px;
}
.gamut-img {
  display: block;
  width: 100%;
  filter: drop-shadow(0 3px 10px rgba(22,24,29,0.16));
}
.chip-data { padding: 14px 18px; display: grid; gap: 3px; }
.chip-name { font-family: var(--serif); font-weight: 700; font-size: 17px; }
.chip-name em { font-style: normal; font-size: 12px; color: var(--ink-soft); margin-left: 6px; }
.chip-lab { font-family: var(--mono); font-size: 12.5px; color: var(--red-deep); }
.chip-note { font-size: 11px; color: var(--ink-soft); }

.hero-foot {
  display: flex; gap: 14px; flex-wrap: wrap;
  padding-top: 18px; padding-bottom: 22px;
  border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.hero-foot i { color: var(--red); font-style: normal; }

/* 進場動畫 */
.anim { opacity: 0; transform: translateY(16px); animation: rise .7s cubic-bezier(.2,.7,.3,1) forwards; }
.a1 { animation-delay: .05s; } .a2 { animation-delay: .15s; }
.a3 { animation-delay: .3s; }  .a4 { animation-delay: .45s; }
.a5 { animation-delay: .6s; }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .anim { animation: none; opacity: 1; transform: none; } }

/* ── 通用 section ── */
.sec { padding: 96px 0; }
.sec-head {
  display: flex; align-items: baseline; gap: 18px;
  margin-bottom: 52px;
  border-bottom: 1.5px solid var(--ink);
  padding-bottom: 14px;
}
.sec-chip {
  width: 14px; height: 14px;
  background: var(--red);
  box-shadow: 3px 3px 0 var(--ink);
  align-self: center;
  flex: none;
}
.sec-tech .sec-chip, .sec-contact .sec-chip { box-shadow: 3px 3px 0 rgba(244,241,234,0.35); }
.sec-head h2 {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(30px, 3.6vw, 42px);
  letter-spacing: 0.04em;
}
.sec-tag {
  margin-left: auto;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em;
  color: var(--ink-soft);
}

/* ── 01 關於 ── */
.about-grid {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px;
  align-items: start;
}
.lede {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.6;
  border-left: 5px solid var(--red);
  padding-left: 24px;
}
.about-body p { color: var(--ink-soft); margin-bottom: 18px; }
.fact-row {
  display: flex; gap: 40px; margin-top: 30px;
  border-top: 1px solid var(--line); padding-top: 22px;
}
.fact-row dt {
  font-family: var(--mono); font-weight: 600; font-size: 22px;
  color: var(--red-deep);
}
.fact-row dd { font-size: 12.5px; color: var(--ink-soft); }

/* ── 02 產品 ── */
.sec-products { background: var(--paper-dim); border-top: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink); }
.prod-list {
  list-style: none;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1.5px solid var(--ink);
  background: var(--ink);   /* 縫線 */
  gap: 1.5px;
}
.prod {
  background: var(--paper);
  padding: 30px 26px 34px;
  border-top: 6px solid var(--bar, var(--ink));
  position: relative;
  transition: background .15s;
}
.prod:hover { background: #fffdf6; }
.prod-idx {
  font-family: var(--mono); font-size: 11px; color: var(--ink-soft);
  letter-spacing: 0.15em;
}
.prod h3 {
  font-family: var(--serif); font-weight: 700; font-size: 19px;
  margin: 8px 0 10px;
}
.prod h3 em {
  font-style: normal; font-family: var(--mono); font-size: 10.5px;
  color: var(--red-deep); border: 1px solid var(--red-deep);
  padding: 1px 6px; margin-left: 8px; vertical-align: 3px;
}
.prod p { font-size: 14px; color: var(--ink-soft); }
.prod-hl { background: #fdf3ec; }
.prod-hl:hover { background: #fdeee2; }

/* ── 03 色彩品管（暗） ── */
.sec-tech {
  background: var(--dark);
  color: var(--dark-text);
  /* 細網格：工程紙 */
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 44px 44px;
}
.sec-tech .sec-head { border-bottom-color: var(--dark-line); }
.sec-tech h2 { color: var(--paper); }
.sec-tech .sec-no { color: var(--red); }
.tech-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  align-items: start;
}
.tpoint { margin-bottom: 34px; }
.tpoint h3 {
  font-family: var(--serif); font-weight: 700; font-size: 20px;
  color: var(--paper);
  margin-bottom: 8px;
}
.tpoint h3::before {
  content: "▸"; color: var(--red); margin-right: 10px;
}
.tpoint p { font-size: 14.5px; }

.lab-wall {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px;
}
.lab-chip {
  background: var(--c);
  color: var(--ink);
  min-height: 118px;
  padding: 12px 14px;
  display: flex; flex-direction: column; justify-content: flex-end;
  border: 1px solid rgba(255,255,255,0.14);
  transition: transform .18s;
}
.lab-chip:hover { transform: translateY(-4px); }
.lab-chip b {
  font-family: var(--serif); font-size: 15.5px;
  color: var(--ink, #1a1c20);
}
.lab-chip b, .lab-chip span { color: var(--ink); }
.lab-chip span {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.02em;
  opacity: 0.85;
}
.lab-note {
  grid-column: 1 / -1;
  font-size: 11.5px; color: #7c828c;
}

/* ── 04 流程 ── */
.flow {
  list-style: none;
  display: grid; grid-template-columns: repeat(4, 1fr);
  counter-reset: step;
}
.flow li {
  padding: 6px 26px 0 0;
  position: relative;
}
.flow li + li { padding-left: 26px; border-left: 1px solid var(--line); }
.flow-no {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  font-family: var(--mono); font-weight: 600; font-size: 16px;
  background: var(--ink); color: var(--paper);
  margin-bottom: 16px;
}
.flow li:nth-child(4) .flow-no { background: var(--red); }
.flow h3 {
  font-family: var(--serif); font-weight: 700; font-size: 19px;
  margin-bottom: 8px;
}
.flow p { font-size: 13.5px; color: var(--ink-soft); }

/* ── 05 聯絡（暗紅底收尾） ── */
.sec-contact {
  background: var(--dark);
  color: var(--dark-text);
  border-top: 6px solid var(--red);
}
.sec-contact .sec-head { border-bottom-color: var(--dark-line); }
.sec-contact h2 { color: var(--paper); }
.sec-contact .sec-no { color: var(--red); }
.contact-grid {
  display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 60px;
  align-items: start;
}
.contact-big p:first-child {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.55;
  color: var(--paper);
}
.tel-link {
  color: var(--red);
  font-family: var(--mono);
  text-decoration: none;
  border-bottom: 3px solid var(--red);
  transition: color .15s, border-color .15s;
}
.tel-link:hover { color: var(--paper); border-bottom-color: var(--paper); }
.contact-hint { margin-top: 18px; font-size: 14.5px; }
.contact-list { display: grid; gap: 0; border-top: 1px solid var(--dark-line); }
.contact-list > div {
  display: grid; grid-template-columns: 64px 1fr; gap: 16px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--dark-line);
}
.contact-list dt {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em;
  color: #7c828c; align-self: center;
}
.contact-list dd { font-size: 15px; color: var(--paper); }
.contact-list dd a { color: var(--paper); text-decoration: none; border-bottom: 1px solid var(--red); }
.line-btn {
  display: inline-block;
  background: #06C755; color: #fff !important;
  font-weight: 700; font-size: 14px;
  padding: 8px 18px;
  border-radius: 6px;
  border-bottom: none !important;
  transition: filter .15s;
}
.line-btn:hover { filter: brightness(1.1); }
.line-id { font-size: 12px; color: #7c828c; margin-left: 8px; }
.btn-line {
  display: inline-block;
  background: #06C755; color: var(--white);
  font-weight: 700; font-size: 15px;
  padding: 14px 26px;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform .12s, box-shadow .12s;
}
.btn-line:hover { transform: translate(-2px,-2px); box-shadow: 6px 6px 0 var(--ink); }

/* ── Footer ── */
.site-footer { background: var(--dark); }
.foot-inner {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 10px; padding-bottom: 26px;
  font-size: 12.5px; color: #7c828c;
  border-top: 1px solid var(--dark-line);
}
.foot-mono { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.18em; }

/* ── RWD ── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; padding-top: 56px; }
  .hero-gamut { max-width: 320px; justify-self: start; }
  .about-grid, .tech-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .prod-list { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr 1fr; gap: 28px 0; }
  .flow li:nth-child(3) { border-left: none; padding-left: 0; }
  .sec { padding: 64px 0; }
  .brand-en { display: none; }
  .main-nav { gap: 16px; }
  .main-nav a { font-size: 13.5px; }
}
@media (max-width: 560px) {
  .header-inner { flex-direction: column; height: auto; padding: 12px 0; gap: 8px; }
  .flow { grid-template-columns: 1fr; }
  .flow li + li { border-left: none; padding-left: 0; }
  .fact-row { flex-wrap: wrap; gap: 22px; }
  .lab-wall { grid-template-columns: 1fr 1fr; }
}