/* ──────────────────────────────────────────────────────────────────────────
   VOOHU · About · Magazine corporate style
   ──────────────────────────────────────────────────────────────────────────
   Fonts self-hosted under ../fonts/about_new/ (Google Fonts blocked in CN).
   Only Latin subsets bundled — CJK falls back to system fonts (PingFang SC
   on Apple, Microsoft YaHei on Windows).
   ────────────────────────────────────────────────────────────────────────── */

@font-face {
  font-family: "Manrope"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/about_new/manrope-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope"; font-style: normal; font-weight: 500; font-display: swap;
  src: url("../fonts/about_new/manrope-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope"; font-style: normal; font-weight: 600; font-display: swap;
  src: url("../fonts/about_new/manrope-latin-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope"; font-style: normal; font-weight: 700; font-display: swap;
  src: url("../fonts/about_new/manrope-latin-700-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Manrope"; font-style: normal; font-weight: 800; font-display: swap;
  src: url("../fonts/about_new/manrope-latin-800-normal.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/about_new/jetbrains-mono-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono"; font-style: normal; font-weight: 500; font-display: swap;
  src: url("../fonts/about_new/jetbrains-mono-latin-500-normal.woff2") format("woff2");
}

:root {
  --bg:          #F5F5F5;
  --bg-2:        #EEEEEE;
  --surface:     #FFFFFF;
  --ink:         #1A1A1A;
  --ink-2:       #333333;
  --ink-mute:    #666666;
  --ink-soft:    #999999;
  --line:        #E5E5E5;
  --line-2:      #D5D5D5;
  --accent:      #C30D23;
  --accent-2:    #9A0A1B;
  --accent-soft: #FBE2E5;

  --f-sans:  "Manrope", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  --f-mono:  "JetBrains Mono", ui-monospace, "PingFang SC", "Microsoft YaHei", monospace;
  --f-disp:  "Manrope", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;

  --sidebar-w: 240px;
  --content-max: 1180px;
  --content-pad: 60px;
  --radius: 6px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body { min-height: 100vh; overflow-x: hidden; }

img { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ─── Shell ─────────────────────────────────────────────────────────────── */

.shell {
  display: block;
  min-height: 100vh;
  position: relative;
}

/* ─── Sidebar (floating in-page) ──────────────────────────────────────── */

.sidebar {
  position: fixed;
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  /* z-index 必须低于全站 header 的 z-index:10。header 自成 stacking context, 内含
     「产品中心 / 行业方案」下拉面板; 下拉面板的 z-index(即便很高)也只在 header 这层
     内部生效, escape 不出去。若本侧边栏 ≥ header(原先 30), 整个侧边栏层会盖在下拉之上
     (即下拉打开时被侧边栏遮挡)。设为 5: 低于 header(10) → 下拉/总菜单打开时盖住侧边栏;
     仍高于本页正文(z:auto) → 平时侧边栏照常浮在内容之上。 */
  z-index: 5;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 8px 28px rgba(0,0,0,0.06);
  padding: 12px 10px;
  width: 168px;
}

/* `.nav` / `.nav-item` 是与全站 common/header.html 下拉导航(`<nav class="nav">` >
   `<div class="nav-item">` 下拉面板)同名的通用类。本表晚于 nc.css 加载, 不加作用域
   会把 `display:grid` 等规则灌进 header 下拉面板, 导致「产品中心 / 行业方案」下拉空白。
   全部限定在 React 根容器 `#voohu-about-root` 内, 既修复 header 又不影响本页侧边栏。 */
#voohu-about-root .nav { display: flex; flex-direction: column; gap: 2px; }

#voohu-about-root .nav-item {
  display: grid;
  grid-template-columns: 22px 1fr;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  text-align: left;
  border: 0;
  border-radius: 4px;
  color: var(--ink-mute);
  transition: background 0.2s ease, color 0.2s ease;
  position: relative;
}
#voohu-about-root .nav-item .num {
  font-family: var(--f-mono);
  font-size: 10px;
  color: var(--ink-soft);
}
#voohu-about-root .nav-item .lbl { font-size: 13px; font-weight: 500; }
#voohu-about-root .nav-item:hover { color: var(--ink); background: var(--bg); }
#voohu-about-root .nav-item:hover .num { color: var(--accent); }
#voohu-about-root .nav-item.active { color: var(--ink); background: var(--bg); }
#voohu-about-root .nav-item.active .num { color: var(--accent); font-weight: 600; }
#voohu-about-root .nav-item.active .lbl { font-weight: 600; }
#voohu-about-root .nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 16px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

/* ─── Content ──────────────────────────────────────────────────────────── */

.content { min-width: 0; background: var(--bg); }

/* ─── Hero banner ──────────────────────────────────────────────────────── */

.section-hero {
  position: relative;
  height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #fff;
  overflow: hidden;
  padding: 0 40px;
  background:
    radial-gradient(circle at 20% 30%, rgba(195,13,35,0.18), transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(80,140,220,0.22), transparent 50%),
    linear-gradient(135deg, #1a2433 0%, #2a3548 50%, #1f2937 100%);
}
.section-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(255,255,255,0.03) 0 2px, transparent 2px 18px);
  pointer-events: none;
  z-index: 1;
}
.section-hero .hero-inner { position: relative; z-index: 2; max-width: 720px; }
.section-hero .hero-kicker {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-bottom: 14px;
}
.section-hero h1 {
  font-size: 42px;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin-bottom: 18px;
}
.section-hero p {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255,255,255,0.78);
  max-width: 600px;
  margin: 0 auto;
}

.s-about  { --hero-grad: linear-gradient(135deg, #1f2937 0%, #2d3748 50%, #1a202c 100%); }
.s-path   { --hero-grad: linear-gradient(135deg, #1a3a52 0%, #2c4a6b 50%, #1e3a5f 100%); }
.s-values { --hero-grad: linear-gradient(135deg, #2a3548 0%, #1a2433 50%, #2a3548 100%); }
.s-phil   { --hero-grad: linear-gradient(135deg, #2c3e4f 0%, #3a4a5c 50%, #1f2937 100%); }
.s-future { --hero-grad: linear-gradient(135deg, #1a2433 0%, #324358 50%, #1a2433 100%); }
.s-prod   { --hero-grad: linear-gradient(135deg, #1a2030 0%, #2a3548 50%, #161b26 100%); }
.s-about .section-hero, .s-path .section-hero, .s-values .section-hero,
.s-phil .section-hero, .s-future .section-hero, .s-prod .section-hero {
  background:
    radial-gradient(circle at 20% 30%, rgba(195,13,35,0.18), transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(80,140,220,0.22), transparent 50%),
    var(--hero-grad);
}

/* ─── Section body ─────────────────────────────────────────────────────── */

.section-body {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 72px var(--content-pad);
}

.section-title { text-align: center; margin-bottom: 56px; }
.section-title h2 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 14px;
}
.section-title .rule {
  width: 36px;
  height: 3px;
  background: var(--accent);
  margin: 0 auto 18px;
  border-radius: 2px;
}
.section-title p {
  font-size: 14.5px;
  color: var(--ink-mute);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ─── Placeholders ─────────────────────────────────────────────────────── */

.ph {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(135deg, #3a4456 0%, #232a38 100%);
  display: flex;
  align-items: flex-end;
  padding: 16px 18px;
  min-height: 200px;
}
.ph::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 26px);
}
.ph-label {
  position: relative;
  z-index: 2;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}

.ph-product   { background: linear-gradient(135deg, #4a5468 0%, #2c3548 100%); }
.ph-showroom  { background: linear-gradient(135deg, #c30d23 0%, #8e0e1d 100%); }
.ph-people    { background: linear-gradient(135deg, #4a5468 0%, #2c3548 100%); }
.ph-nature    { background: linear-gradient(135deg, #3a5c5e 0%, #1f3a3d 100%); }
.ph-industrial{ background: linear-gradient(135deg, #2c3548 0%, #1a2030 100%); }
.ph-facility  { background: linear-gradient(135deg, #5a6478 0%, #3a4456 100%); }
.ph-showroom .ph-label { color: rgba(255,255,255,0.85); }

.ph-tall { min-height: 280px; }
.ph-wide { min-height: 120px; }

/* ─── About Us · Video thumb + modal ───────────────────────────────────── */

.video-thumb {
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.video-thumb:hover,
.video-thumb:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  outline: none;
}
.video-thumb-cover {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}
.video-thumb-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  pointer-events: none;
  opacity: 0.9;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.video-thumb:hover .video-thumb-play,
.video-thumb:focus-visible .video-thumb-play {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.08);
}

.video-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4vw;
  animation: video-modal-fade 0.18s ease-out;
}
@keyframes video-modal-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.video-modal-inner {
  width: min(1200px, 100%);
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.video-modal-inner video {
  width: 100%;
  max-height: 90vh;
  background: #000;
  border-radius: 4px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
}
.video-modal-close {
  position: absolute;
  top: 16px;
  right: 24px;
  width: 44px;
  height: 44px;
  border: none;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
  transition: background 0.2s ease;
}
.video-modal-close:hover { background: rgba(255,255,255,0.25); }

/* ─── About Us · Two-column ────────────────────────────────────────────── */

.about-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  align-items: stretch;
}
.about-imgcol {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-self: stretch;
  min-height: 0;
}
.about-imgcol > .ph {
  flex: 1 1 0;
  min-height: 160px;
}
.about-imgcol > .ph-tall { flex: 1.8 1 0; }
.about-imgcol > .brand-callout { flex: 0 0 auto; }

.brand-callout {
  background: var(--accent);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.brand-callout::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(255,255,255,0.05) 0 1px, transparent 1px 20px);
}
.brand-callout .bc-logo {
  font-family: var(--f-disp);
  font-size: 36px;
  font-weight: 800;
  letter-spacing: 0.08em;
  position: relative;
  z-index: 2;
}
.brand-callout .bc-sub {
  font-size: 12px;
  letter-spacing: 0.18em;
  margin-top: 6px;
  text-transform: uppercase;
  opacity: 0.85;
  position: relative;
  z-index: 2;
}

.about-textcol h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--ink);
  margin-bottom: 18px;
}
.about-textcol p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
  margin-bottom: 20px;
}

.callout-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 28px 0;
}
.callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  padding: 14px 18px;
  border-radius: 4px;
}
.callout .ck {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 4px;
}
.callout .cv {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 64px 0 0;
  padding: 32px 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.ss {
  text-align: center;
  border-right: 1px solid var(--line);
  padding: 0 8px;
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
.ss:last-child { border-right: 0; }
.stat-strip.in-view .ss {
  opacity: 1;
  transform: translateY(0);
}
.ss .n {
  display: block;
  font-family: var(--f-disp);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.ss .lab {
  display: block;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  margin-top: 8px;
}

/* ─── Development Path · horizontal timeline ──────────────────────────── */

.path-display { position: relative; }

.path-content {
  display: grid;
  grid-template-columns: 44px 1fr 1fr 44px;
  gap: 36px;
  align-items: center;
  min-height: 300px;
  margin-bottom: 96px;
}

.path-nav {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.path-nav:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface);
}

.path-text { padding: 0 8px; animation: content-fade 0.45s ease-out both; }
.path-img { min-height: 280px; aspect-ratio: 4/3; animation: content-fade 0.45s ease-out both; }
@keyframes content-fade {
  0%   { opacity: 0; transform: translateY(8px); }
  100% { opacity: 1; transform: translateY(0); }
}
.path-tag {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-weight: 600;
  padding: 4px 10px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.path-text h4 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 18px;
}
.path-text ul { display: flex; flex-direction: column; gap: 10px; }
.path-text li {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-mute);
  padding-left: 18px;
  position: relative;
}
.path-text li::before {
  content: "·";
  position: absolute; left: 4px;
  color: var(--accent);
  font-weight: 700;
  font-size: 20px;
  line-height: 1;
  top: 2px;
}

/* Big year overlay — translates with the track */
.path-bigs-clip {
  position: relative;
  overflow: hidden;
  height: 52px;
  margin-bottom: 28px;
}
.path-bigs {
  display: grid;
  height: 100%;
  transition: transform 0.5s cubic-bezier(0.33, 1, 0.68, 1);
}
.path-bigs.no-transition {
  transition: none;
}
.path-bigs.no-transition .path-big-text {
  transition: none;
}
.path-big-cell {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  height: 100%;
}
.path-big-text {
  font-family: var(--f-disp);
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.01em;
  white-space: nowrap;
  pointer-events: none;
  transform-origin: center bottom;
  transform: scale(0.34);
  opacity: 0;
  transition:
    opacity 0.45s cubic-bezier(0.33, 1, 0.68, 1),
    transform 0.45s cubic-bezier(0.33, 1, 0.68, 1);
}
.path-big-text.active {
  opacity: 1;
  transform: scale(1);
}

/* Timeline track */
.path-track {
  position: relative;
  padding: 0;
  overflow: hidden;
}
.path-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 14px;
  border-top: 1px dashed var(--line-2);
  z-index: 0;
}
.path-nodes {
  display: grid;
  position: relative;
  z-index: 1;
  width: 100%;
  transition: transform 0.5s cubic-bezier(0.33, 1, 0.68, 1);
}
.path-nodes.no-transition {
  transition: none;
}
.path-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 8px 0 4px;
  background: none;
  border: 0;
  cursor: pointer;
}
.path-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 1.5px solid var(--line-2);
  position: relative;
  z-index: 2;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.path-label {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  transition: color 0.25s ease, font-weight 0.25s ease;
}
.path-node:hover .path-dot {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.path-node:hover .path-label { color: var(--ink); }

.path-node.active .path-dot {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 5px rgba(195, 13, 35, 0.14);
}
.path-node.active .path-label {
  visibility: hidden;
  position: relative;
}

/* Triangle arrow ▲ — replaces the year label, centered on the same x/y */
.path-node.active .path-label::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 0;
  height: 0;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-bottom: 9px solid var(--accent);
  visibility: visible;
}

/* Remove the old top triangle */
.path-node.active::before { display: none; }
.path-node.active::after { display: none; }

/* ─── Brand Value · alternating image+text rows ────────────────────────── */

.rows { display: flex; flex-direction: column; gap: 36px; }
.row-imgtext {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.row-imgtext.reverse { grid-template-columns: 1fr 1fr; }
.row-imgtext.reverse .row-img { order: 2; }
.row-imgtext.reverse .row-text { order: 1; }

.row-img { min-height: 240px; }

.row-text { padding: 0 8px; }
.row-num {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--accent);
}
.row-text h4 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 14px;
}
.row-text p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-mute);
}

/* ─── Future Plans · vertical alternating ──────────────────────────────── */

.future-list { display: flex; flex-direction: column; gap: 32px; }
.fut-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.fut-row.reverse .fut-img { order: 2; }
.fut-row.reverse .fut-text { order: 1; }
.fut-img { min-height: 220px; }

.fut-year {
  display: inline-block;
  font-family: var(--f-disp);
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent);
  margin-bottom: 6px;
  line-height: 1;
}
.fut-text h4 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--ink);
  margin: 6px 0 16px;
}
.fut-text ul { display: flex; flex-direction: column; gap: 8px; }
.fut-text li {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-mute);
  padding-left: 18px;
  position: relative;
}
.fut-text li::before {
  content: "→";
  position: absolute; left: 0;
  color: var(--accent);
  font-weight: 600;
}

/* ─── Production · tabs + base rows ────────────────────────────────────── */

.prod-tabs {
  display: flex;
  justify-content: center;
  gap: 36px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}
.prod-tab {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-mute);
  padding: 8px 4px;
  position: relative;
  transition: color 0.2s ease;
}
.prod-tab:hover { color: var(--ink); }
.prod-tab.active { color: var(--accent); font-weight: 600; }
.prod-tab.active::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 0; right: 0;
  height: 2px;
  background: var(--accent);
}

.base-list { display: flex; flex-direction: column; gap: 28px; margin-bottom: 56px; }
.base-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.base-row:last-child { border-bottom: 0; }
.base-label {
  font-size: 13px;
  color: var(--ink-mute);
  padding-top: 4px;
  font-weight: 500;
}
.base-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}
.base-content .addr {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-mute);
  margin-bottom: 8px;
}
.base-content .tel {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 18px;
}
.base-img { width: 100%; max-width: 450px; aspect-ratio: 16/9; object-fit: cover; }

.prod-certs {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
}
.prod-certs h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  text-align: center;
  margin-bottom: 4px;
}
.prod-certs .sub {
  font-size: 13px;
  color: var(--ink-mute);
  text-align: center;
  margin-bottom: 24px;
}
.cert-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.cert {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px 12px;
  text-align: center;
  transition: border-color 0.2s ease;
}
.cert:hover { border-color: var(--accent); }
.cert .name {
  font-family: var(--f-disp);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.cert .desc {
  font-size: 11px;
  color: var(--ink-mute);
  margin-top: 4px;
}

/* ─── Footer ───────────────────────────────────────────────────────────── */

.foot {
  padding: 36px var(--content-pad);
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-mute);
}
.foot .links { display: flex; gap: 24px; }
.foot a:hover { color: var(--accent); }

/* ─── Responsive ───────────────────────────────────────────────────────── */

@media (max-width: 1100px) {
  :root { --content-pad: 40px; }
  .section-hero h1 { font-size: 34px; }
  .about-layout { grid-template-columns: 260px 1fr; gap: 32px; }
  .timeline-list .tl-row { grid-template-columns: 80px 200px 1fr; gap: 20px; }
}

@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    bottom: 0; left: 0; right: 0; top: auto;
    transform: none;
    width: auto;
    height: auto;
    padding: 10px 12px;
    border: 0;
    border-top: 1px solid var(--line);
    border-radius: 0;
    box-shadow: 0 -4px 16px rgba(0,0,0,0.06);
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(8px);
  }
  #voohu-about-root .nav { flex-direction: row; gap: 4px; overflow-x: auto; flex-wrap: nowrap; }
  #voohu-about-root .nav-item { padding: 8px 12px; white-space: nowrap; border-radius: 999px; grid-template-columns: auto auto; }
  #voohu-about-root .nav-item.active::before { display: none; }
  #voohu-about-root .nav-item.active { background: var(--ink); color: #fff; }
  #voohu-about-root .nav-item.active .num { color: #ff8a99; }
  #voohu-about-root .nav-item .lbl { font-size: 12px; }

  .section-hero { height: 240px; }
  .section-hero h1 { font-size: 26px; }
  .section-body { padding: 48px 20px; }

  .about-layout { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); gap: 16px 0; }
  .ss { border-right: 0; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
  .ss:nth-child(odd) { border-right: 1px solid var(--line); }
  .ss:nth-last-child(-n+2) { border-bottom: 0; }
  .callout-row { grid-template-columns: 1fr; }

  .path-content {
    grid-template-columns: 1fr;
    gap: 18px;
    min-height: 0;
  }
  .path-nav { display: none; }
  .path-year-big { display: none; }
  .path-track { overflow-x: auto; padding-bottom: 12px; }
  .path-nodes { min-width: 520px; }

  .row-imgtext, .fut-row {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .row-imgtext.reverse .row-img, .fut-row.reverse .fut-img { order: 0; }
  .row-imgtext.reverse .row-text, .fut-row.reverse .fut-text { order: 0; }

  .prod-tabs { gap: 16px; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 10px; }
  .prod-tab { white-space: nowrap; font-size: 13px; }
  .base-row { grid-template-columns: 1fr; gap: 16px; }
  .cert-row { grid-template-columns: repeat(2, 1fr); }
  .foot { padding: 24px 20px 80px; flex-direction: column; gap: 12px; }
}

/* Hide only the legacy page banner; keep header spacers so the hero starts below nav. */
.nhnavs { display: none !important; }