/* ========== Daijin Light Tech Theme ==========
   Pure HTML/CSS/JS (no framework)
   - White base + soft gradients + glass cards
   - Responsive, accessible, fast
============================================== */

:root {
  --bg0: #ffffff;
  --bg1: #f6f8ff;
  --bg2: #eef3ff;

  --text: #0b1220;
  --muted: rgba(11, 18, 32, .72);
  --muted2: rgba(11, 18, 32, .55);

  --panel: rgba(255, 255, 255, .72);
  --panel2: rgba(255, 255, 255, .86);
  --stroke: rgba(11, 18, 32, .10);

  --accent: #2563eb;
  /* blue */
  --accent2: #7c3aed;
  /* purple */
  --good: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;

  --shadow: 0 18px 60px rgba(2, 6, 23, .12);
  --shadow2: 0 10px 30px rgba(2, 6, 23, .10);

  --radius: 18px;
  --radius2: 26px;
  --max: 1120px;

  --ring: 0 0 0 3px rgba(37, 99, 235, .22);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 520px at 12% 10%, rgba(37, 99, 235, .12), transparent 60%),
    radial-gradient(900px 520px at 85% 18%, rgba(124, 58, 237, .10), transparent 60%),
    radial-gradient(900px 520px at 70% 90%, rgba(22, 163, 74, .06), transparent 60%),
    linear-gradient(180deg, var(--bg0) 0%, var(--bg1) 45%, var(--bg2) 100%);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-color: rgba(37, 99, 235, .35) !important;
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

/* subtle grid */
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image:
    linear-gradient(to right, rgba(2, 6, 23, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(2, 6, 23, .05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(closest-side, rgba(0, 0, 0, 1), rgba(0, 0, 0, 0));
  -webkit-mask-image: radial-gradient(closest-side, rgba(0, 0, 0, 1), rgba(0, 0, 0, 0));
}

/* soft blobs (keep same HTML, but make them subtle) */
.orb {
  position: fixed;
  width: 540px;
  height: 540px;
  border-radius: 999px;
  filter: blur(70px);
  opacity: .22;
  pointer-events: none;
  mix-blend-mode: multiply;
}

.orb.a {
  left: -210px;
  top: -170px;
  background: radial-gradient(circle at 30% 30%, rgba(37, 99, 235, .85), rgba(37, 99, 235, 0) 65%);
}

.orb.b {
  right: -210px;
  top: 10px;
  background: radial-gradient(circle at 35% 30%, rgba(124, 58, 237, .80), rgba(124, 58, 237, 0) 65%);
}

.orb.c {
  right: 8%;
  bottom: -260px;
  background: radial-gradient(circle at 40% 40%, rgba(22, 163, 74, .60), rgba(22, 163, 74, 0) 65%);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, .70);
  border-bottom: 1px solid rgba(2, 6, 23, .08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  letter-spacing: .2px;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background:
    radial-gradient(circle at 30% 30%, rgba(37, 99, 235, .95), rgba(37, 99, 235, 0) 58%),
    radial-gradient(circle at 70% 70%, rgba(124, 58, 237, .90), rgba(124, 58, 237, 0) 60%),
    rgba(255, 255, 255, .78);
  border: 1px solid rgba(2, 6, 23, .10);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, .08), 0 12px 30px rgba(2, 6, 23, .10);
}

.brand small {
  display: block;
  font-weight: 800;
  color: var(--muted2);
  letter-spacing: .2px;
  margin-top: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  color: var(--muted);
  font-weight: 900;
  font-size: 14px;
}

.nav a:hover {
  background: rgba(2, 6, 23, .04);
  border-color: rgba(2, 6, 23, .06);
  color: var(--text);
}

.nav a.active {
  color: var(--text);
  background: linear-gradient(90deg, rgba(37, 99, 235, .12), rgba(124, 58, 237, .10));
  border-color: rgba(37, 99, 235, .22);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, .10);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 14px;
  border: 1px solid rgba(2, 6, 23, .10);
  background: rgba(255, 255, 255, .72);
  color: var(--text);
  font-weight: 900;
  font-size: 14px;
  box-shadow: var(--shadow2);
  cursor: pointer;
  user-select: none;
}

.btn:hover {
  background: rgba(255, 255, 255, .92);
}

.btn.primary {
  border-color: rgba(37, 99, 235, .30);
  background: linear-gradient(90deg, rgba(37, 99, 235, .92), rgba(124, 58, 237, .88));
  color: #fff;
}

.btn.primary:hover {
  filter: brightness(1.03);
}

.btn.ghost {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  color: var(--muted);
}

.btn.ghost:hover {
  color: var(--text);
  background: rgba(2, 6, 23, .04);
}

.menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
}

@media (max-width: 860px) {
  .nav {
    display: none;
  }

  .menu-btn {
    display: inline-flex;
  }
}

/* Mobile drawer */
.drawer {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 60;
}

.drawer.open {
  display: block;
}

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, .35);
}

.drawer-panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: min(340px, 86vw);
  background: rgba(255, 255, 255, .88);
  border-left: 1px solid rgba(2, 6, 23, .10);
  backdrop-filter: blur(18px);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.drawer-panel .nav-col {
  display: grid;
  gap: 10px;
}

.drawer-panel .nav-col a {
  display: block;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(2, 6, 23, .10);
  background: rgba(255, 255, 255, .70);
  color: var(--muted);
  font-weight: 900;
}

.drawer-panel .nav-col a.active {
  color: var(--text);
  border-color: rgba(37, 99, 235, .28);
  background: linear-gradient(90deg, rgba(37, 99, 235, .12), rgba(124, 58, 237, .10));
}

.drawer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Sections */
.section {
  padding: 64px 0;
}

.section.tight {
  padding: 44px 0;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.h2 {
  margin: 0;
  font-size: 28px;
  letter-spacing: .2px;
}

.kicker {
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted2);
}

.p {
  margin: 10px 0 0 0;
  color: var(--muted);
  line-height: 1.75;
}

/* Cards / panels */
.panel {
  border-radius: var(--radius2);
  border: 1px solid rgba(2, 6, 23, .10);
  background: linear-gradient(180deg, rgba(255, 255, 255, .85), rgba(255, 255, 255, .62));
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}

.panel::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: radial-gradient(700px 220px at 20% 0%, rgba(37, 99, 235, .18), transparent 60%),
    radial-gradient(700px 220px at 80% 0%, rgba(124, 58, 237, .14), transparent 60%);
  opacity: .85;
  pointer-events: none;
}

.panel>* {
  position: relative;
}

.panel-inner {
  padding: 26px;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: 1.05fr .95fr;
}

.grid.three {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 980px) {
  .grid.two {
    grid-template-columns: 1fr;
  }

  .grid.three {
    grid-template-columns: 1fr;
  }
}

.hero {
  padding: 46px 0 18px;
}

.hero .panel-inner {
  padding: 34px 30px;
}

.hero-title {
  margin: 0;
  font-size: clamp(30px, 3.6vw, 48px);
  letter-spacing: .2px;
  line-height: 1.15;
}

.hero-sub {
  margin: 12px 0 18px;
  max-width: 60ch;
  color: var(--muted);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(2, 6, 23, .10);
  background: rgba(255, 255, 255, .72);
  color: var(--muted);
  font-weight: 900;
  font-size: 13px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .14);
}

.dot.purple {
  background: var(--accent2);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, .12);
}

.dot.green {
  background: var(--good);
  box-shadow: 0 0 0 4px rgba(22, 163, 74, .10);
}

/* Feature cards */
.feature {
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid rgba(2, 6, 23, .10);
  background: rgba(255, 255, 255, .70);
  box-shadow: 0 10px 26px rgba(2, 6, 23, .06);
}

.feature h3 {
  margin: 0;
  font-size: 16px;
  letter-spacing: .2px;
}

.feature p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

.icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 10px;
  border: 1px solid rgba(2, 6, 23, .10);
  background:
    radial-gradient(circle at 30% 30%, rgba(37, 99, 235, .18), rgba(37, 99, 235, 0) 60%),
    radial-gradient(circle at 70% 70%, rgba(124, 58, 237, .16), rgba(124, 58, 237, 0) 60%),
    rgba(255, 255, 255, .72);
}

/* Info blocks */
.info {
  display: grid;
  gap: 10px;
}

.info-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(2, 6, 23, .10);
  background: rgba(255, 255, 255, .72);
}

.info-row b {
  font-size: 14px;
}

.info-row span {
  color: var(--muted);
  font-size: 14px;
  text-align: right;
}

/* Contact form */
.form {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 8px;
}

label {
  font-weight: 900;
  letter-spacing: .2px;
  font-size: 13px;
  color: var(--muted);
}

input,
textarea {
  width: 100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(2, 6, 23, .12);
  background: rgba(255, 255, 255, .78);
  color: var(--text);
  font-size: 14px;
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.note {
  color: var(--muted2);
  font-size: 13px;
  line-height: 1.6;
}

/* Footer */
.footer {
  padding: 34px 0 44px;
  color: var(--muted2);
  border-top: 1px solid rgba(2, 6, 23, .08);
  background: rgba(255, 255, 255, .55);
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer a {
  color: var(--muted);
}

.footer a:hover {
  color: var(--text);
}

.sep {
  opacity: .45;
  padding: 0 10px;
}

.small {
  font-size: 12px;
  color: var(--muted2);
}

.hr {
  height: 1px;
  background: rgba(2, 6, 23, .10);
  margin: 16px 0;
}

/* Page title panel */
.page-title {
  padding: 38px 0 14px;
}

.breadcrumb {
  color: var(--muted2);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: .08em;
}


/* ══════════════════════════════════════
   產品頁樣式
   ══════════════════════════════════════ */

/* ── 系列頁籤 ── */
.series-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.series-tab {
  padding: 10px 22px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  border: 1px solid rgba(11, 18, 32, 0.10);
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  transition: all 0.25s ease;
  user-select: none;
}

.series-tab:hover {
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  border-color: rgba(11, 18, 32, 0.16);
}

.series-tab.active {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.25);
}

/* ── 系列內容區 ── */
.series-content {
  display: none;
}

.series-content.active {
  display: block;
  animation: fadeUp 0.4s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.series-title {
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 800;
  margin-bottom: 6px;
}

.series-desc {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 28px;
}

/* ── 子系列（直式/橫式）頁籤 ── */
.sub-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 24px;
}

.sub-tab {
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid rgba(11, 18, 32, 0.08);
  background: transparent;
  color: var(--muted2);
  transition: all 0.2s ease;
}

.sub-tab:hover {
  color: var(--text);
  background: rgba(11, 18, 32, 0.03);
}

.sub-tab.active {
  background: rgba(11, 18, 32, 0.06);
  color: var(--text);
  border-color: rgba(11, 18, 32, 0.14);
}

.sub-content {
  display: none;
}

.sub-content.active {
  display: block;
  animation: fadeUp 0.3s ease;
}

/* ── 產品卡片網格 ── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.product-card {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(11, 18, 32, 0.08);
  border-radius: 14px;
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: default;
  box-shadow: 0 4px 14px rgba(2, 6, 23, 0.05);
}

.product-card:hover {
  border-color: rgba(37, 99, 235, 0.3);
  background: rgba(255, 255, 255, 0.92);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(2, 6, 23, 0.12);
}

.product-card-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: rgba(11, 18, 32, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid rgba(11, 18, 32, 0.06);
}

.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-card:hover .product-card-img img {
  transform: scale(1.05);
}

.product-card-img .placeholder {
  font-size: 36px;
  opacity: 0.2;
}

.product-card-body {
  padding: 16px 18px;
}

.product-card-body h4 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 4px;
}

.product-card-body p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
}

.no-sub-note {
  font-size: 14px;
  color: var(--muted2);
  margin-bottom: 24px;
  font-style: italic;
}

/* ── 產品頁 RWD ── */
@media (max-width: 600px) {
  .series-tabs {
    gap: 6px;
  }

  .series-tab {
    padding: 8px 14px;
    font-size: 13px;
  }

  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
  }
}

.product-card-img img {
  cursor: zoom-in;
}