/* Budytech 官网样式
   色彩：品牌蓝取自矢量 Logo（#10218B），界面主色按官网方案使用 #172F8F；青色只用于时序/脉冲图形。 */

/* ── 1. Tokens ─────────────────────────────────────────── */
:root {
  /* primitive */
  --blue-900: #0c1a66;
  --blue-800: #10218b;   /* Logo 矢量取样 */
  --blue-700: #172f8f;   /* 方案品牌蓝 */
  --blue-100: #e3e8f8;
  --blue-50: #f1f4fc;
  --cyan-400: #3cc6d8;
  --cyan-500: #16afc4;
  --cyan-800: #0b6f7e;
  --graphite-950: #080b10;
  --graphite-900: #111823;
  --graphite-800: #1e293b;
  --graphite-600: #475569;
  --graphite-500: #5b6a80;
  --mist-300: #cbd5e1;
  --mist-200: #dbe3ec;
  --mist-100: #f2f6fa;
  --white: #fff;
  --red-700: #b42318;

  /* semantic */
  --c-brand: var(--blue-700);
  --c-brand-strong: var(--blue-800);
  --c-brand-hover: var(--blue-900);
  --c-signal: var(--cyan-500);
  --c-text: var(--graphite-800);
  --c-text-2: var(--graphite-600);
  --c-text-3: var(--graphite-500);
  --c-line: var(--mist-200);
  --c-line-strong: var(--mist-300);
  --c-bg: var(--white);
  --c-bg-tint: var(--mist-100);
  --c-stage: #000;
  --c-panel: var(--graphite-900);
  --c-danger: var(--red-700);

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  /* 型号、数值与标题中的西文：DIN 风格的系统字体，中文自动回落到上面的字体 */
  --font-data: "Bahnschrift", "DIN Alternate", "DIN 2014", "Roboto Condensed", "Arial Narrow", var(--font-sans);

  --wrap: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 68px;
  --radius: 4px;
  --radius-lg: 8px;
  --sec: clamp(56px, 8vw, 104px);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ── 2. Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 64px); }
body { margin: 0; font-family: var(--font-sans); font-size: 16px; line-height: 1.75; color: var(--c-text); background: var(--c-bg); -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
h1, h2, h3 { font-family: var(--font-data); font-weight: 700; line-height: 1.25; color: var(--graphite-900); text-wrap: balance; }
/* 中文标题优先在标点处换行，过长时才在字间断开 */
:lang(zh-CN) :is(h1, h2) { word-break: keep-all; overflow-wrap: anywhere; }
h1 { font-size: clamp(2rem, 1.2rem + 3vw, 3.25rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 1.1rem + 1.5vw, 2.125rem); }
h3 { font-size: 1.125rem; }
p { text-wrap: pretty; }
a { color: var(--c-brand); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--c-brand-hover); }
address { font-style: normal; }
:focus-visible { outline: 3px solid var(--cyan-500); outline-offset: 2px; border-radius: 2px; }
main:focus { outline: none; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; padding: 10px 16px; background: var(--c-brand); color: #fff; border-radius: var(--radius); }
.skip:focus { top: 12px; color: #fff; }
.wrap { width: 100%; max-width: calc(var(--wrap) + var(--gutter) * 2); margin-inline: auto; padding-inline: var(--gutter); }
.data { font-family: var(--font-data); font-variant-numeric: tabular-nums; letter-spacing: .01em; }
.icon { flex: none; }
.eyebrow { font-size: .875rem; font-weight: 600; color: var(--c-brand); letter-spacing: .04em; margin-bottom: 14px; }
.lead { font-size: clamp(1.0625rem, 1rem + .3vw, 1.1875rem); line-height: 1.8; color: var(--c-text-2); max-width: 44em; }
.src-note, .img-note, .table-note, .aside-note { font-size: .875rem; color: var(--c-text-3); line-height: 1.65; }

/* ── 3. Buttons & links ────────────────────────────────── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 10px 22px; border: 1px solid transparent; border-radius: var(--radius); font: inherit; font-weight: 600; line-height: 1.3; text-decoration: none; cursor: pointer; transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease); }
.btn-sm { min-height: 40px; padding: 6px 16px; font-size: .9375rem; }
.btn-primary { background: var(--c-brand); color: #fff; }
.btn-primary:hover { background: var(--c-brand-hover); color: #fff; }
.btn-outline { border-color: var(--c-brand); color: var(--c-brand); background: transparent; }
.btn-outline:hover { background: var(--blue-50); }
.btn-quiet { color: var(--c-brand); background: transparent; padding-inline: 12px; }
.btn-quiet:hover { background: var(--blue-50); }
.btn-light { background: #fff; color: var(--c-brand-strong); }
.btn-light:hover { background: var(--blue-100); color: var(--c-brand-strong); }
.btn-ghost-light { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn-ghost-light:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.btn-meta { font-weight: 400; font-size: .8125rem; opacity: .85; padding-left: 8px; border-left: 1px solid rgba(255, 255, 255, .4); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.more { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; text-decoration: none; color: var(--c-brand); }
.more .icon { transition: transform .18s var(--ease); }
a:hover .more .icon, .more:hover .icon { transform: translateX(3px); }

/* ── 4. Header ─────────────────────────────────────────── */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .96); border-bottom: 1px solid var(--c-line); backdrop-filter: saturate(1.4) blur(8px); }
.header-in { display: flex; align-items: center; gap: 28px; height: var(--header-h); }
.brand { display: flex; align-items: center; flex: none; }
.brand img { width: 142px; height: auto; }
.nav { display: flex; align-items: center; flex: 1; gap: 20px; }
.nav > ul { display: flex; align-items: center; gap: 2px; flex: 1; }
.nav > ul > li { position: relative; }
.nav > ul > li > a { display: flex; align-items: center; height: var(--header-h); padding: 0 13px; color: var(--c-text); font-weight: 500; text-decoration: none; white-space: nowrap; border-bottom: 2px solid transparent; }
.nav > ul > li > a:hover { color: var(--c-brand); }
.nav > ul > li > a[aria-current="page"] { color: var(--c-brand); border-bottom-color: var(--c-brand); }
.nav-sub { position: absolute; left: 0; top: 100%; min-width: 180px; padding: 8px; background: #fff; border: 1px solid var(--c-line); border-radius: 0 0 var(--radius-lg) var(--radius-lg); box-shadow: 0 12px 28px rgba(16, 33, 139, .1); opacity: 0; visibility: hidden; transform: translateY(-4px); transition: opacity .16s var(--ease), transform .16s var(--ease), visibility .16s; }
.has-sub:hover .nav-sub, .has-sub:focus-within .nav-sub { opacity: 1; visibility: visible; transform: none; }
.nav-sub a { display: block; padding: 10px 12px; border-radius: var(--radius); color: var(--c-text); text-decoration: none; white-space: nowrap; }
.nav-sub a:hover { background: var(--blue-50); color: var(--c-brand); }
.nav-tools { display: flex; align-items: center; gap: 14px; flex: none; }
.lang { display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 0 8px; color: var(--c-text-2); font-size: .9375rem; text-decoration: none; border-radius: var(--radius); }
.lang:hover { color: var(--c-brand); background: var(--blue-50); }
.nav-toggle { display: none; margin-left: auto; width: 48px; height: 48px; align-items: center; justify-content: center; border: 1px solid var(--c-line); border-radius: var(--radius); background: #fff; color: var(--c-text); cursor: pointer; }
.nav-toggle-close { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle-open { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle-close { display: block; }

@media (max-width: 1039px) {
  .nav-toggle { display: inline-flex; }
  .nav { position: absolute; left: 0; right: 0; top: 100%; display: none; flex-direction: column; align-items: stretch; gap: 0; max-height: calc(100dvh - var(--header-h)); overflow-y: auto; padding: 8px var(--gutter) 24px; background: #fff; border-bottom: 1px solid var(--c-line); box-shadow: 0 18px 30px rgba(8, 11, 16, .12); }
  .nav.is-open { display: flex; }
  .nav > ul { flex-direction: column; align-items: stretch; gap: 0; }
  .nav > ul > li > a { height: auto; min-height: 52px; padding: 0 4px; border-bottom: 1px solid var(--c-line); font-size: 1.0625rem; }
  .nav > ul > li > a[aria-current="page"] { border-bottom-color: var(--c-line); }
  .nav-sub { position: static; opacity: 1; visibility: visible; transform: none; border: 0; box-shadow: none; padding: 0 0 0 16px; border-bottom: 1px solid var(--c-line); border-radius: 0; }
  .nav-sub a { min-height: 46px; display: flex; align-items: center; padding: 0 4px; color: var(--c-text-2); }
  .nav-tools { margin-top: 20px; justify-content: space-between; }
}

/* ── 5. Sections ───────────────────────────────────────── */
.section { padding-block: var(--sec); }
.section-tight { padding-block: clamp(44px, 6vw, 72px); }
.section-flush { padding-block: clamp(32px, 4vw, 48px) 0; }
.section-tint { background: var(--c-bg-tint); }
.sec-head { max-width: 46rem; margin-bottom: clamp(28px, 4vw, 44px); }
.sec-head p { margin-top: 12px; color: var(--c-text-2); }
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 6vw, 80px); align-items: start; }
.split > div > h2 { margin-bottom: 18px; }
.split > div > p + p { margin-top: 14px; }
.split > div > .btn { margin-top: 28px; }
.split-about { grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); }
.split-diagram { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); align-items: center; }
.narrow-grid { display: grid; grid-template-columns: minmax(0, 300px) minmax(0, 1fr); gap: clamp(24px, 5vw, 64px); align-items: start; }
.narrow-grid > div > h2 + p, .narrow-grid > div > p + p { margin-top: 12px; }
@media (max-width: 859px) {
  .split, .split-about, .split-diagram, .narrow-grid { grid-template-columns: minmax(0, 1fr); }
}

/* ── 6. Hero ───────────────────────────────────────────── */
.hero { padding-block: clamp(40px, 6vw, 84px) clamp(48px, 7vw, 96px); background: linear-gradient(180deg, var(--c-bg-tint), #fff 62%); }
.hero-in { display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero-copy h1 { margin-bottom: 22px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 2px 28px; margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--c-line); font-size: .9375rem; color: var(--c-text-2); }
.hero-meta span:first-child { color: var(--c-text); font-weight: 500; }
.bench { background: var(--c-panel); border-radius: var(--radius-lg); overflow: hidden; color: #c5d0de; }
.bench-photo { position: relative; background: var(--c-stage); }
.bench-photo img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: 50% 42%; }
.bench-tag { position: absolute; left: 16px; bottom: 12px; padding: 3px 10px; font-size: .8125rem; color: #e6ecf4; background: rgba(8, 11, 16, .62); border: 1px solid rgba(255, 255, 255, .16); border-radius: 2px; }
@media (max-width: 959px) { .hero-in { grid-template-columns: minmax(0, 1fr); } }

/* ── 7. Timing diagram（标志性元素：相机触发—曝光—闪光时序） ── */
.timing { padding: 18px 20px 20px; color: #c5d0de; }
.timing svg { width: 100%; height: auto; font-family: var(--font-sans); }
.timing figcaption { margin-top: 10px; font-size: .8125rem; line-height: 1.65; color: #93a3b8; }
.t-labels text { fill: #dbe4ef; font-size: 14px; font-weight: 500; }
.t-ann { fill: #93a3b8; font-size: 12px; }
.t-axis { fill: #7d8da3; }
.t-guide { stroke: #93a3b8; stroke-opacity: .5; stroke-width: 1; stroke-dasharray: 3 5; }
.t-line { fill: none; stroke: #b6c3d4; stroke-width: 2; stroke-linejoin: round; }
.t-pulse { stroke: var(--cyan-400); stroke-width: 2.5; }
.t-pulse-xe { stroke: #f1f5fb; }
.t-fill-led { fill: var(--cyan-500); fill-opacity: .22; }
.t-fill-xe { fill: #fff; fill-opacity: .16; }
.panel-dark { background: var(--c-panel); border-radius: var(--radius-lg); }
@media (prefers-reduced-motion: no-preference) {
  /* 默认状态即完整图形；动画只定义起始帧，动画不可用时图形照常显示 */
  .hero .t-pulse { stroke-dasharray: 1; animation: t-draw 1.3s .35s var(--ease) backwards; }
  .hero .t-pulse-xe { animation-delay: .7s; }
  .hero .t-fill { animation: t-fade .5s 1.5s ease-out backwards; }
}
@keyframes t-draw { from { stroke-dashoffset: 1; } }
@keyframes t-fade { from { opacity: 0; } }

/* ── 8. Stage（产品图展示台：黑底影棚图直接融入） ───────── */
.stage { display: grid; place-items: center; aspect-ratio: 4 / 3; background: var(--c-stage); border-radius: var(--radius-lg); overflow: hidden; }
.stage img { width: 100%; height: 100%; object-fit: contain; }
.stage-light { background: #fff; border: 1px solid var(--c-line); }
.stage-light img { padding: 6%; }
.stage-draw { background: #fff; border: 1px solid var(--c-line); }
.stage-draw img { padding: 5%; }
.stage-empty { background: var(--c-bg-tint); border: 1px dashed var(--c-line-strong); color: var(--c-text-3); text-align: center; font-size: .9375rem; }
.stage-empty .data { font-size: 1.25rem; color: var(--c-text-2); }

/* ── 9. Home blocks ────────────────────────────────────── */
.route-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(20px, 3vw, 32px); }
.route { display: flex; flex-direction: column; border: 1px solid var(--c-line); border-radius: var(--radius-lg); background: #fff; overflow: hidden; }
.route-media .stage { aspect-ratio: 16 / 9; border-radius: 0; }
.route-media .stage img { object-fit: cover; }
.route-body { display: flex; flex-direction: column; gap: 14px; padding: clamp(22px, 3vw, 32px); flex: 1; }
.route-body h2, .route-body h3 { font-size: 1.5rem; }
.route-body p { color: var(--c-text-2); }
.route-body .more { margin-top: auto; padding-top: 6px; }
.route-count { font-size: .9375rem; }
.route-count .data { font-size: 1.25rem; font-weight: 700; color: var(--graphite-900); }
.ticks, .chips { display: flex; flex-wrap: wrap; gap: 8px; }
.ticks li, .chips li { padding: 3px 12px; font-size: .875rem; line-height: 1.7; color: var(--c-text-2); background: var(--c-bg-tint); border: 1px solid var(--c-line); border-radius: 2px; }
.section-tint .chips li { background: #fff; }

.app-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr) minmax(0, 1fr); gap: clamp(16px, 2.4vw, 24px); }
.app { display: flex; flex-direction: column; gap: 12px; padding: clamp(22px, 3vw, 32px); background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); color: var(--c-text-2); text-decoration: none; transition: border-color .18s var(--ease), box-shadow .18s var(--ease); }
.app:hover { color: var(--c-text-2); border-color: var(--c-brand); box-shadow: 0 10px 24px rgba(16, 33, 139, .08); }
.app h3 { font-size: 1.375rem; }
.app .more { margin-top: auto; padding-top: 8px; }
.app-lead { background: var(--c-brand-strong); border-color: var(--c-brand-strong); color: #dfe5fb; }
.app-lead:hover { color: #dfe5fb; border-color: var(--blue-900); }
.app-lead h3, .app-lead .more { color: #fff; }
.app-kicker { font-size: .8125rem; font-weight: 600; letter-spacing: .06em; color: var(--cyan-400); }
.aside-note { margin-top: 24px; max-width: 46rem; }
@media (max-width: 859px) { .route-grid, .app-grid { grid-template-columns: minmax(0, 1fr); } }

.steps { counter-reset: step; display: grid; gap: 0; }
.steps li { counter-increment: step; position: relative; padding: 0 0 26px 60px; }
.steps li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: -2px; width: 40px; font-family: var(--font-data); font-size: 1.375rem; font-weight: 700; color: var(--c-brand); }
.steps li::after { content: ""; position: absolute; left: 13px; top: 34px; bottom: 6px; width: 1px; background: var(--c-line-strong); }
.steps li:last-child { padding-bottom: 0; }
.steps li:last-child::after { display: none; }
.steps h3 { margin-bottom: 4px; }
.steps p { color: var(--c-text-2); font-size: .9375rem; }

.facts { border-top: 2px solid var(--graphite-900); }
.facts > div { display: grid; grid-template-columns: 6.5em minmax(0, 1fr); gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--c-line-strong); }
.facts dt { color: var(--c-text-3); font-size: .9375rem; }
.facts dd { font-weight: 500; }
.facts .data { font-size: 1.25rem; font-weight: 700; }

.cta-band { background: var(--c-brand-strong); color: #dfe5fb; }
.cta-in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px 48px; padding-block: clamp(40px, 6vw, 64px); }
.cta-band h2 { color: #fff; font-size: clamp(1.375rem, 1.1rem + 1.1vw, 1.875rem); }
.cta-band p { margin-top: 8px; max-width: 38em; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* ── 10. Page head / crumbs / anchor nav ───────────────── */
.page-head { padding-block: clamp(28px, 4vw, 44px) clamp(36px, 5vw, 60px); background: var(--c-bg-tint); border-bottom: 1px solid var(--c-line); }
.page-head h1 { font-size: clamp(1.875rem, 1.3rem + 2.2vw, 2.75rem); max-width: 22em; }
.page-head .lead { margin-top: 18px; }
.crumbs { margin-bottom: clamp(20px, 3vw, 32px); font-size: .875rem; color: var(--c-text-3); }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 2px 0; }
.crumbs li + li::before { content: "/"; margin: 0 8px; color: var(--c-line-strong); }
.crumbs a { color: var(--c-text-2); text-decoration: none; }
.crumbs a:hover { color: var(--c-brand); text-decoration: underline; }
.anchor-nav { position: sticky; top: var(--header-h); z-index: 30; background: rgba(255, 255, 255, .97); border-bottom: 1px solid var(--c-line); }
.anchor-nav ul { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.anchor-nav ul::-webkit-scrollbar { display: none; }
.anchor-nav a { display: flex; align-items: center; min-height: 48px; padding: 0 14px; font-size: .9375rem; font-weight: 500; color: var(--c-text-2); text-decoration: none; white-space: nowrap; border-bottom: 2px solid transparent; }
.anchor-nav li:first-child a { padding-left: 0; }
.anchor-nav a:hover { color: var(--c-brand); border-bottom-color: var(--c-brand); }

/* ── 11. Products ──────────────────────────────────────── */
.confirm { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 12px 28px; align-items: center; padding: 20px 24px; border: 1px solid var(--c-line); border-radius: var(--radius-lg); }
.confirm h2 { font-size: 1.0625rem; }
.en-photos { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-block: 24px clamp(40px, 6vw, 72px); }
.en-photos .stage { aspect-ratio: 16 / 9; }
.en-photos .stage img { object-fit: cover; }
@media (max-width: 639px) { .confirm { grid-template-columns: minmax(0, 1fr); } .en-photos { grid-template-columns: minmax(0, 1fr); } }

.p-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: clamp(16px, 2.4vw, 28px); }
.p-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); overflow: hidden; transition: border-color .18s var(--ease), box-shadow .18s var(--ease); }
.p-card:hover { border-color: var(--c-brand); box-shadow: 0 10px 24px rgba(16, 33, 139, .08); }
.p-card-media .stage { border-radius: 0; border: 0; border-bottom: 1px solid var(--c-line); }
.p-card-body { display: flex; flex-direction: column; gap: 10px; padding: 22px 22px 24px; flex: 1; }
.p-card-series { font-size: .8125rem; color: var(--c-text-3); }
.p-card h3 { font-size: 1.375rem; }
.p-card h3 a { color: inherit; text-decoration: none; }
.p-card h3 a:hover { color: var(--c-brand); }
.p-card-body > p { color: var(--c-text-2); font-size: .9375rem; }
.p-card .more { margin-top: auto; padding-top: 6px; }
.kv { display: grid; gap: 0; border-top: 1px solid var(--c-line); }
.kv > div { display: flex; justify-content: space-between; gap: 16px; padding: 8px 0; border-bottom: 1px solid var(--c-line); font-size: .9375rem; }
.kv dt { color: var(--c-text-3); }
.kv dd { font-weight: 600; color: var(--graphite-900); text-align: right; }
.kv-lg { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; margin-top: 26px; border-top: 2px solid var(--graphite-900); }
.kv-lg > div { flex-direction: column; gap: 2px; padding: 14px 0; }
.kv-lg dd { text-align: left; font-size: 1.375rem; font-weight: 700; }

.pd-head { padding-block: clamp(24px, 3vw, 36px) clamp(36px, 5vw, 64px); }
.pd-top { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.pd-info h1 { font-size: clamp(2rem, 1.4rem + 2.4vw, 3rem); margin-bottom: 14px; }
.pd-info .img-note { margin-top: 14px; }
.gallery .img-note { margin-top: 10px; }
.thumbs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.thumb { display: block; width: 76px; height: 60px; padding: 0; border: 2px solid transparent; border-radius: var(--radius); background: #000; overflow: hidden; cursor: pointer; opacity: .72; transition: opacity .15s, border-color .15s; }
.thumb-light { background: #fff; border-color: var(--c-line); }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb:hover, .thumb[aria-current="true"] { opacity: 1; }
.thumb[aria-current="true"] { border-color: var(--c-brand); }
@media (max-width: 859px) { .pd-top { grid-template-columns: minmax(0, 1fr); } }

.feature-list { display: grid; gap: 0; border-top: 1px solid var(--c-line-strong); }
.feature-list li { position: relative; padding: 14px 0 14px 28px; border-bottom: 1px solid var(--c-line); }
.feature-list li::before { content: ""; position: absolute; left: 4px; top: 1.65em; width: 12px; height: 2px; background: var(--c-signal); }
.wiring { display: grid; gap: 32px; }
.wire h3 { margin-bottom: 12px; }
.notes { margin-top: 12px; display: grid; gap: 6px; font-size: .9375rem; color: var(--c-text-2); }
.notes li { position: relative; padding-left: 16px; }
.notes li::before { content: ""; position: absolute; left: 2px; top: .8em; width: 5px; height: 5px; border-radius: 50%; background: var(--c-line-strong); }
.drawing { display: block; position: relative; padding: 16px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); }
.drawing img { margin-inline: auto; max-height: 460px; width: auto; }
.drawing span { position: absolute; right: 12px; bottom: 10px; padding: 2px 8px; font-size: .8125rem; background: rgba(255, 255, 255, .92); border: 1px solid var(--c-line); border-radius: 2px; }
.docs-col h3 { margin: 28px 0 12px; }
.docs-col h3:first-child { margin-top: 0; }
.doc-list a { display: flex; align-items: center; gap: 14px; padding: 14px 16px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); text-decoration: none; color: var(--c-text); }
.doc-list a:hover { border-color: var(--c-brand); color: var(--c-brand); }
.doc-list span { flex: 1; display: grid; }
.doc-list small { color: var(--c-text-3); font-size: .8125rem; }
.related { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 12px; margin-top: 20px; }
.related-col { grid-template-columns: minmax(0, 1fr); margin-top: 12px; }
.related a { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 2px 12px; padding: 14px 16px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); text-decoration: none; color: var(--graphite-900); }
.related a > span { font-weight: 700; font-size: 1.0625rem; }
.related a small { grid-column: 1; color: var(--c-text-3); font-size: .8125rem; }
.related a .icon { grid-column: 2; grid-row: 1 / span 2; color: var(--c-brand); }
.related a:hover { border-color: var(--c-brand); }

/* ── 12. Tables ────────────────────────────────────────── */
.table-scroll { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--radius-lg); background: #fff; }
.table-title { margin: 32px 0 12px; }
.table-title:first-of-type { margin-top: 0; }
.table-note { margin-top: 10px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .9375rem; line-height: 1.6; font-variant-numeric: tabular-nums; }
.spec-table th, .spec-table td { padding: 12px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--c-line); }
.spec-table tbody tr:last-child > * { border-bottom: 0; }
.spec-table thead th { background: var(--c-bg-tint); font-size: .8125rem; font-weight: 600; color: var(--c-text-2); white-space: nowrap; border-bottom-color: var(--c-line-strong); }
.spec-table tbody th { font-weight: 600; color: var(--graphite-900); }
.spec-table.kvt tbody th { width: 34%; font-weight: 500; color: var(--c-text-2); background: #fafcfe; }
.spec-table.compare { min-width: 820px; }
.spec-table.compare tbody th { white-space: nowrap; }
.spec-table.compare tbody th a { text-decoration: none; font-size: 1rem; }
.spec-table.compare tbody th a:hover { text-decoration: underline; }
.spec-table.pins { text-align: center; }
.spec-table.pins th, .spec-table.pins td { text-align: center; border-right: 1px solid var(--c-line); }
.spec-table.pins th:last-child, .spec-table.pins td:last-child { border-right: 0; }
.spec-table.pins thead th { background: var(--graphite-800); color: #fff; font-size: .875rem; border-color: var(--graphite-600); }
.dl { display: inline-flex; align-items: center; gap: 6px; min-height: 32px; font-size: .875rem; white-space: nowrap; text-decoration: none; font-weight: 500; }
.dl:hover { text-decoration: underline; }
.dl-ask { color: var(--c-text-2); text-decoration: underline; }

/* ── 13. Applications / custom / about ─────────────────── */
.app-block { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.app-text h2 { margin-bottom: 18px; }
.app-text h3 { margin: 28px 0 12px; }
.app-text .btn { margin-top: 28px; }
.app-side { display: grid; gap: 20px; }
.side-card { padding: 24px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); }
.side-card h3 { margin-bottom: 8px; }
.side-card p { color: var(--c-text-2); font-size: .9375rem; }
.side-card .src-note { margin-top: 12px; }
.side-card .more { margin-top: 12px; }
.checks { display: grid; gap: 10px; }
.checks li { position: relative; padding-left: 26px; color: var(--c-text-2); }
.checks li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 12px; height: 7px; border-left: 2px solid var(--c-brand); border-bottom: 2px solid var(--c-brand); transform: rotate(-45deg); }
.checks strong { color: var(--graphite-900); font-weight: 600; }
.split .checks { margin-top: 18px; }
.narrow-grid .checks { margin-block: 14px; }
.scope-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border: 1px solid var(--c-line); border-radius: var(--radius-lg); background: #fff; overflow: hidden; }
.scope-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.scope { padding: clamp(20px, 2.6vw, 28px); border-right: 1px solid var(--c-line); }
.scope:last-child { border-right: 0; }
.scope h3 { margin-bottom: 10px; padding-bottom: 10px; border-bottom: 2px solid var(--c-signal); display: inline-block; }
.scope p { color: var(--c-text-2); font-size: .9375rem; }
.scope .src-note { margin-top: 10px; }
.prose h2 { margin: 36px 0 14px; }
.prose h2:first-child { margin-top: 0; }
.prose p + p { margin-top: 14px; }
.motto { font-family: var(--font-data); font-size: 1.5rem; font-weight: 700; color: var(--c-brand-strong); }
.about-photos { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.about-photos .stage { aspect-ratio: 1; }
.about-photos .stage img { object-fit: cover; }
@media (max-width: 959px) {
  .app-block { grid-template-columns: minmax(0, 1fr); }
  .scope-grid, .scope-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scope { border-bottom: 1px solid var(--c-line); }
  .scope:nth-child(2n) { border-right: 0; }
}
@media (max-width: 559px) {
  .scope-grid, .scope-3 { grid-template-columns: minmax(0, 1fr); }
  .scope { border-right: 0; }
  .scope:last-child { border-bottom: 0; }
}

/* ── 14. FAQ ───────────────────────────────────────────── */
.faq { border-top: 1px solid var(--c-line-strong); }
.faq details { border-bottom: 1px solid var(--c-line); }
.faq summary { position: relative; display: block; padding: 16px 44px 16px 0; font-weight: 600; color: var(--graphite-900); cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before, .faq summary::after { content: ""; position: absolute; right: 8px; top: 50%; width: 14px; height: 2px; background: var(--c-brand); transition: transform .2s var(--ease); }
.faq summary::after { transform: rotate(90deg); }
.faq details[open] summary::after { transform: rotate(0); }
.faq summary:hover { color: var(--c-brand); }
.faq details p { padding: 0 44px 18px 0; color: var(--c-text-2); }

/* ── 15. Contact & forms ───────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.contact-grid h2 { font-size: 1.5rem; margin-bottom: 18px; }
.contact-card { padding: clamp(22px, 3vw, 32px); background: var(--c-bg-tint); border: 1px solid var(--c-line); border-radius: var(--radius-lg); }
.contact-list > div { display: grid; grid-template-columns: 4em minmax(0, 1fr); gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--c-line-strong); }
.contact-list > div:first-child { border-top: 1px solid var(--c-line-strong); }
.contact-list dt { color: var(--c-text-3); font-size: .9375rem; }
.contact-list dd { font-weight: 500; overflow-wrap: anywhere; }
.contact-list .data { font-size: 1.25rem; font-weight: 700; text-decoration: none; }
.contact-mini { display: grid; gap: 4px; margin-top: 20px; }
.contact-row { display: flex; flex-wrap: wrap; gap: 4px 28px; margin-block: 16px 20px; }
.contact-mini a { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; font-weight: 600; text-decoration: none; }
@media (max-width: 859px) { .contact-grid { grid-template-columns: minmax(0, 1fr); } }

.inquiry { padding: clamp(20px, 3vw, 32px); border: 1px solid var(--c-line); border-radius: var(--radius-lg); background: #fff; }
.form-progress { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-bottom: 24px; counter-reset: fp; }
.form-progress li { counter-increment: fp; padding-top: 10px; border-top: 3px solid var(--c-line); font-size: .875rem; color: var(--c-text-3); }
.form-progress li::before { content: counter(fp) ". "; font-family: var(--font-data); }
.form-progress li.is-on { border-top-color: var(--c-brand); color: var(--c-brand); font-weight: 600; }
.form-step { margin: 0 0 8px; padding: 0; border: 0; min-width: 0; }
.form-step legend { padding: 0; margin-bottom: 14px; font-family: var(--font-data); font-size: 1.125rem; font-weight: 700; color: var(--graphite-900); }
.inquiry:not(.is-steps) .form-step + .form-step { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--c-line); }
.step-no { color: var(--c-brand); margin-right: 6px; }
.fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 20px; }
.field-wide, .fields .field:only-child { grid-column: 1 / -1; }
.field label { display: block; margin-bottom: 6px; font-size: .9375rem; font-weight: 600; color: var(--graphite-900); }
.field .req { font-weight: 400; color: var(--c-text-3); font-size: .8125rem; }
.field input, .field textarea { width: 100%; min-height: 48px; padding: 10px 12px; font: inherit; font-size: 16px; color: var(--c-text); background: #fff; border: 1px solid var(--c-line-strong); border-radius: var(--radius); transition: border-color .15s, box-shadow .15s; }
.field textarea { resize: vertical; line-height: 1.6; }
.field input::placeholder, .field textarea::placeholder { color: #8a97a8; }
.field input:hover, .field textarea:hover { border-color: var(--graphite-500); }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--c-brand); box-shadow: 0 0 0 3px rgba(23, 47, 143, .18); }
.field [aria-invalid="true"] { border-color: var(--c-danger); }
.field-err { margin-top: 6px; font-size: .875rem; color: var(--c-danger); }
.form-nav { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.form-status { margin-top: 18px; padding: 12px 14px; font-size: .9375rem; background: var(--blue-50); border-left: 3px solid var(--c-brand); border-radius: 0 var(--radius) var(--radius) 0; }
.form-status.is-error { background: #fef3f2; border-left-color: var(--c-danger); color: var(--c-danger); }
.form-note { margin-top: 12px; font-size: .8125rem; line-height: 1.65; color: var(--c-text-3); }
@media (max-width: 559px) { .fields { grid-template-columns: minmax(0, 1fr); } }

/* ── 16. Footer & mobile dock ──────────────────────────── */
.site-footer { background: var(--c-bg-tint); border-top: 1px solid var(--c-line); font-size: .9375rem; color: var(--c-text-2); }
.footer-in { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 2fr); gap: clamp(28px, 5vw, 72px); padding-block: clamp(40px, 5vw, 64px) 36px; }
.footer-brand p { margin: 14px 0 12px; font-weight: 600; color: var(--graphite-900); }
.footer-brand address { display: grid; gap: 2px; }
.footer-brand address > * { display: flex; align-items: flex-start; gap: 10px; padding: 5px 0; color: var(--c-text-2); text-decoration: none; }
.footer-brand address .icon { margin-top: 3px; width: 18px; height: 18px; color: var(--c-text-3); }
.footer-brand address a:hover { color: var(--c-brand); }
.footer-nav { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 24px; }
.footer-nav h2 { font-family: var(--font-sans); font-size: .875rem; font-weight: 600; color: var(--graphite-900); margin-bottom: 10px; }
.footer-nav a { display: inline-flex; align-items: center; min-height: 34px; color: var(--c-text-2); text-decoration: none; }
.footer-nav a:hover { color: var(--c-brand); text-decoration: underline; }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 24px; padding-block: 18px 22px; border-top: 1px solid var(--c-line-strong); font-size: .8125rem; color: var(--c-text-3); }
.dock { display: none; }
@media (max-width: 859px) {
  .footer-in { grid-template-columns: minmax(0, 1fr); }
  body { padding-bottom: calc(60px + env(safe-area-inset-bottom)); }
  .dock { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 10px; padding: 8px var(--gutter) calc(8px + env(safe-area-inset-bottom)); background: rgba(255, 255, 255, .97); border-top: 1px solid var(--c-line); }
  .dock a { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; border: 1px solid var(--c-brand); border-radius: var(--radius); color: var(--c-brand); font-weight: 600; text-decoration: none; }
  .dock .dock-primary { background: var(--c-brand); color: #fff; }
}

/* ── 17. Motion preferences / print ────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-delay: 0s !important; }
}
@media print {
  .site-header, .dock, .cta-band, .anchor-nav, .nav-toggle { display: none !important; }
  body { padding: 0; }
  .section { padding-block: 24px; }
}