/* ============ 设计变量 ============ */
:root {
  --c-primary: #2563eb;        /* 技术蓝 */
  --c-primary-dark: #1d4ed8;
  --c-ink: #0f172a;            /* 近黑 */
  --c-slate: #475569;
  --c-muted: #94a3b8;
  --c-line: #e2e8f0;
  --c-bg: #ffffff;
  --c-tint: #f8fafc;
  --radius: 14px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);
  --shadow-md: 0 8px 30px rgba(15, 23, 42, .08);
  --font: "Inter", "Noto Sans SC", -apple-system, "PingFang SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
.container { width: min(1180px, 92%); margin: 0 auto; }

/* ============ 通用 ============ */
.section { padding: 110px 0; }
.section-tint { background: var(--c-tint); }
.section-head { max-width: 640px; margin-bottom: 56px; }
.eyebrow {
  font-size: 12px; letter-spacing: .22em; font-weight: 600;
  color: var(--c-primary); text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 700; letter-spacing: -.01em; }
.section-lead { color: var(--c-slate); margin-top: 14px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 30px; border-radius: 999px; font-size: 15px; font-weight: 500;
  border: 1px solid transparent; transition: all .25s ease;
}
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost { border-color: var(--c-line); color: var(--c-ink); }
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ============ Header ============ */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(255,255,255,.85); backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .3s, box-shadow .3s;
}
.site-header.scrolled { border-color: var(--c-line); box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark { width: 34px; height: 34px; color: var(--c-primary); }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-size: 16px; }
.logo-text small { font-size: 10px; letter-spacing: .18em; color: var(--c-muted); }
.main-nav { display: flex; gap: 34px; }
.main-nav a {
  font-size: 15px; font-weight: 500; color: var(--c-slate);
  position: relative; transition: color .2s;
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--c-primary); transition: width .25s ease;
}
.main-nav a:hover, .main-nav a.active { color: var(--c-ink); }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
.header-actions { display: flex; align-items: center; gap: 16px; }
.lang-switch {
  display: flex; border: 1px solid var(--c-line); border-radius: 999px; overflow: hidden;
}
.lang-btn {
  border: 0; background: transparent; padding: 6px 14px; font-size: 13px;
  color: var(--c-slate); transition: all .2s;
}
.lang-btn.active { background: var(--c-primary); color: #fff; }
.menu-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; padding: 6px; }
.menu-toggle span { width: 22px; height: 2px; background: var(--c-ink); transition: .3s; }

/* ============ Hero ============ */
.hero { position: relative; padding: 190px 0 90px; overflow: hidden; }
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--c-line) 1px, transparent 1px),
                    linear-gradient(90deg, var(--c-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 70% 30%, #000 20%, transparent 70%);
  opacity: .55;
}
.hero-inner {
  position: relative; display: grid; grid-template-columns: 1.1fr .9fr;
  gap: 60px; align-items: center;
}
.hero-copy h1 {
  font-size: clamp(34px, 5vw, 54px); font-weight: 700; line-height: 1.25;
  letter-spacing: -.015em; margin: 16px 0 22px;
}
.hero-lead { color: var(--c-slate); max-width: 540px; font-size: 17px; }
.hero-cta { display: flex; gap: 16px; margin-top: 36px; }
.hero-visual { display: flex; justify-content: center; }
.cad-figure { width: 100%; max-width: 440px; animation: float 7s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

.hero-stats {
  position: relative; display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; margin-top: 90px; padding-top: 40px; border-top: 1px solid var(--c-line);
}
.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 44px; font-weight: 700; color: var(--c-primary); line-height: 1; font-variant-numeric: tabular-nums; }
.stat-plus { font-size: 18px; font-weight: 600; color: var(--c-primary); }
.stat-label { color: var(--c-slate); margin-top: 8px; font-size: 15px; }

/* ============ Products ============ */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.filter-btn {
  padding: 9px 22px; border-radius: 999px; border: 1px solid var(--c-line);
  background: #fff; color: var(--c-slate); font-size: 14px; transition: all .2s;
}
.filter-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.filter-btn.active { background: var(--c-ink); border-color: var(--c-ink); color: #fff; }

.product-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.product-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  overflow: hidden; transition: transform .3s ease, box-shadow .3s ease;
  animation: cardIn .45s ease both;
}
@keyframes cardIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.product-thumb {
  aspect-ratio: 4/3; background: var(--c-tint); border-bottom: 1px solid var(--c-line);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.product-thumb img { width: 100%; height: 100%; object-fit: contain; background: #fff; transition: transform .4s ease; padding: 8px; box-sizing: border-box; }
.product-card:hover .product-thumb img { transform: scale(1.04); }
.product-body { padding: 22px 24px 26px; }
.product-tag {
  display: inline-block; font-size: 11px; letter-spacing: .1em; font-weight: 600;
  color: var(--c-primary); background: rgba(37,99,235,.07);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 12px;
}
.product-body h3 { font-size: 19px; font-weight: 600; }
.product-body p { color: var(--c-slate); font-size: 14px; margin-top: 8px; }

/* ============ Capabilities ============ */
.cap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.cap-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 32px 28px; transition: transform .3s, box-shadow .3s;
}
.cap-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.cap-icon {
  width: 52px; height: 52px; border-radius: 12px; background: rgba(37,99,235,.08);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.cap-icon svg { width: 26px; height: 26px; color: var(--c-primary); }
.cap-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 10px; }
.cap-card p { color: var(--c-slate); font-size: 14px; }

/* ============ Quality / About ============ */
.quality-inner, .about-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center;
}
.quality-copy h2, .about-copy h2 {
  font-size: clamp(26px, 3.4vw, 36px); font-weight: 700; margin-bottom: 24px; letter-spacing: -.01em;
}
.qc-list { list-style: none; }
.qc-list li {
  padding: 14px 0 14px 34px; border-bottom: 1px solid var(--c-line);
  position: relative; color: var(--c-slate);
}
.qc-list li::before {
  content: ""; position: absolute; left: 0; top: 24px; width: 16px; height: 16px;
  border: 2px solid var(--c-primary); border-radius: 50%;
  background: radial-gradient(circle, var(--c-primary) 0 4px, transparent 4px);
}
.quality-visual img, .about-visual img { border-radius: var(--radius); border: 1px solid var(--c-line); }
.about-copy p { color: var(--c-slate); margin-bottom: 16px; }

/* 关于我们：数据与愿景 */
.about-metrics {
  display: flex; gap: 0; margin-top: 34px; border-top: 1px solid var(--c-line);
}
.about-metric { flex: 1; padding: 22px 8px 0 0; }
.about-metric + .about-metric { padding-left: 28px; border-left: 1px solid var(--c-line); }
.about-metric-num {
  font-size: 34px; font-weight: 700; color: var(--c-primary); line-height: 1;
  font-variant-numeric: tabular-nums; letter-spacing: -.01em;
}
.about-metric-plus { font-size: 18px; font-weight: 600; margin-left: 2px; }
.about-metric-label { display: block; margin-top: 8px; color: var(--c-slate); font-size: 14px; }
.about-vision {
  margin-top: 90px; padding: 10px 0 10px 40px; border-left: 2px solid var(--c-primary);
  display: flex; flex-direction: column; gap: 14px;
}
.about-vision-eyebrow {
  font-size: 12px; letter-spacing: .24em; font-weight: 600; color: var(--c-muted);
  text-transform: uppercase;
}
.about-vision-text {
  color: var(--c-ink); font-size: clamp(19px, 2.4vw, 26px); font-weight: 600;
  line-height: 1.7; letter-spacing: .01em; max-width: 880px;
}
.about-vision-text em { font-style: normal; color: var(--c-primary); }
@media (max-width: 960px) {
  .about-metrics { flex-direction: column; gap: 18px; }
  .about-metric + .about-metric { padding-left: 0; border-left: 0; padding-top: 18px; border-top: 1px solid var(--c-line); }
  .about-vision { margin-top: 50px; padding-left: 26px; }
}

/* ============ Contact ============ */
.contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 60px; }
.form-row { position: relative; margin-bottom: 22px; }
.form-row input, .form-row textarea {
  width: 100%; padding: 15px 16px; border: 1px solid var(--c-line); border-radius: 10px;
  font: inherit; font-size: 15px; background: #fff; transition: border-color .2s, box-shadow .2s;
  resize: vertical;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.form-row label {
  position: absolute; left: 12px; top: 15px; padding: 0 6px;
  color: var(--c-muted); font-size: 15px; background: #fff;
  transition: all .18s ease; pointer-events: none;
}
.form-row input:focus + label, .form-row input:not(:placeholder-shown) + label,
.form-row textarea:focus + label, .form-row textarea:not(:placeholder-shown) + label {
  top: -9px; font-size: 12px; color: var(--c-primary);
}
.form-note { margin-top: 14px; font-size: 14px; color: var(--c-primary); min-height: 1.5em; }
.info-item { padding: 20px 0; border-bottom: 1px solid var(--c-line); }
.info-item h4 { font-size: 13px; letter-spacing: .1em; color: var(--c-muted); font-weight: 600; margin-bottom: 6px; }
.info-item p { color: var(--c-slate); }
.info-item a { color: var(--c-slate); border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
.info-item a:hover { color: var(--c-primary); border-color: var(--c-primary); }

/* ============ Footer ============ */
.site-footer { background: var(--c-ink); color: #cbd5e1; padding: 60px 0 40px; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; align-items: flex-start; }
.footer-brand { display: flex; flex-direction: column; gap: 6px; }
.footer-brand strong { color: #fff; font-size: 18px; }
.footer-brand span { font-size: 13px; color: var(--c-muted); }
.footer-nav { display: flex; gap: 28px; }
.footer-nav a { font-size: 14px; color: #cbd5e1; transition: color .2s; }
.footer-nav a:hover { color: #fff; }
.footer-copy { width: 100%; margin-top: 30px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); font-size: 13px; color: var(--c-muted); }
.footer-icp { width: 100%; margin-top: 8px; font-size: 12px; color: var(--c-muted); }
.footer-icp a { color: var(--c-muted); border-bottom: 1px dashed rgba(148,163,184,.5); transition: color .2s; }
.footer-icp a:hover { color: #fff; border-color: #fff; }

/* ============ 滚动动画 ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: .1s; } .delay-2 { transition-delay: .2s; } .delay-3 { transition-delay: .3s; }

/* ============ 产品大类卡片 ============ */
.category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.category-card {
  display: block; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  overflow: hidden; transition: transform .35s ease, box-shadow .35s ease, border-color .35s;
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.category-thumb {
  aspect-ratio: 16/9; background: #fff; border-bottom: 1px solid var(--c-line);
  overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.category-thumb img { width: 100%; height: 100%; object-fit: contain; padding: 14px; box-sizing: border-box; transition: transform .5s ease; }
.category-card:hover .category-thumb img { transform: scale(1.05); }
.category-body { display: flex; gap: 22px; padding: 28px 30px 32px; align-items: flex-start; }
.category-index {
  font-family: "Menlo", monospace; font-size: 15px; color: var(--c-muted);
  padding-top: 6px; letter-spacing: .05em;
}
.category-card:hover .category-index { color: var(--c-primary); }
.category-body h3 { font-size: 21px; font-weight: 600; }
.category-body p { color: var(--c-slate); font-size: 14px; margin-top: 8px; }
.category-meta {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 16px;
  font-size: 13px; font-weight: 600; color: var(--c-primary);
}
.category-meta .arrow { transition: transform .3s ease; font-style: normal; }
.category-card:hover .category-meta .arrow { transform: translateX(6px); }

/* ============ 路由进度线 & 页面过渡 ============ */
.route-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 200;
  background: var(--c-primary); transform: scaleX(0); transform-origin: left;
}
.route-progress.active { animation: progressSweep .55s ease forwards; }
@keyframes progressSweep {
  0% { transform: scaleX(0); opacity: 1; }
  60% { transform: scaleX(1); }
  100% { transform: scaleX(1); opacity: 0; }
}
.page-leave { opacity: 0; transform: translateY(18px); transition: opacity .26s ease, transform .26s ease; }
.page-enter { opacity: 0; transform: translateY(26px); transition: opacity .5s ease, transform .5s ease; }
.page-view { min-height: 60vh; }

/* ============ 面包屑 ============ */
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 13px; margin-bottom: 36px; flex-wrap: wrap; }
.breadcrumb a { color: var(--c-muted); transition: color .2s; }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb span { color: var(--c-ink); font-weight: 500; }
.breadcrumb i { color: var(--c-line); font-style: normal; }

/* ============ 子页头部 ============ */
.detail-hero { padding: 150px 0 70px; background: var(--c-tint); border-bottom: 1px solid var(--c-line); }
.cat-head { max-width: 720px; }
.cat-count {
  display: inline-block; margin-top: 22px; font-size: 13px; font-weight: 600;
  color: var(--c-primary); background: rgba(37,99,235,.07); padding: 5px 14px; border-radius: 999px;
}
.detail-title { font-size: clamp(28px, 4vw, 42px); font-weight: 700; letter-spacing: -.01em; line-height: 1.3; }
.detail-desc { color: var(--c-slate); margin-top: 16px; font-size: 16px; max-width: 640px; }

/* ============ 产品实拍图集 ============ */
.gallery-section { padding-top: 90px; }
.gallery {
  display: grid; grid-template-columns: 1.6fr .72fr; gap: 48px;
  align-items: start; max-width: 1240px;
}
.gallery-media { min-width: 0; }
.gallery-main {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--c-line); background: #fff; cursor: zoom-in;
  display: flex; align-items: center; justify-content: center;
}
.gallery-main img {
  width: 100%; aspect-ratio: 4/3; object-fit: contain; background: #fff;
  transition: opacity .24s ease, translate .24s ease;
}
.gallery-main img.is-swapping { opacity: 0; translate: -18px 0; }
.gallery-zoom {
  position: absolute; right: 16px; bottom: 16px; width: 42px; height: 42px;
  border-radius: 50%; background: rgba(255,255,255,.92); box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: center; color: var(--c-ink);
  opacity: 0; transform: translateY(6px); transition: all .3s ease; pointer-events: none;
}
.gallery-main:hover .gallery-zoom { opacity: 1; transform: none; }
.gallery-zoom svg { width: 20px; height: 20px; }
.gallery-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 14px; }
.gallery-thumb {
  border: 2px solid transparent; border-radius: 10px; overflow: hidden; padding: 0;
  background: none; transition: border-color .25s ease, transform .25s ease; line-height: 0;
}
.gallery-thumb img { width: 100%; aspect-ratio: 4/3; object-fit: contain; background: #fff; }
.gallery-thumb:hover { transform: translateY(-3px); }
.gallery-thumb.active { border-color: var(--c-primary); }

/* 右侧文字栏 */
.gallery-copy { position: relative; padding-top: 6px; }
.gallery-copy-eyebrow {
  font-size: 12px; letter-spacing: .18em; font-weight: 600; color: var(--c-primary);
  text-transform: uppercase;
}
.gallery-copy-title { font-size: 24px; font-weight: 700; margin: 12px 0 14px; letter-spacing: -.01em; }
.gallery-copy-desc { color: var(--c-slate); font-size: 15px; }
.gallery-caption {
  margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--c-line);
  transition: opacity .24s ease, translate .24s ease;
}
.gallery-caption.is-swapping { opacity: 0; translate: -18px 0; }
.gallery-caption-idx {
  font-family: "Menlo", monospace; font-size: 13px; color: var(--c-muted); letter-spacing: .06em;
}
.gallery-caption-text { margin-top: 10px; color: var(--c-ink); font-size: 16px; font-weight: 500; }
@media (max-width: 960px) {
  .gallery { grid-template-columns: 1fr; gap: 30px; }
}

/* ============ 灯箱 ============ */
.lightbox {
  position: fixed; inset: 0; z-index: 300; background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  animation: lbIn .3s ease; padding: 60px;
}
@keyframes lbIn { from { opacity: 0; } to { opacity: 1; } }
.lightbox img {
  max-width: min(1000px, 100%); max-height: 100%; border-radius: var(--radius);
  box-shadow: var(--shadow-md); animation: lbZoom .35s ease;
}
@keyframes lbZoom { from { transform: scale(.96); opacity: 0; } to { transform: none; opacity: 1; } }
.lightbox-close {
  position: absolute; top: 28px; right: 32px; width: 46px; height: 46px;
  border-radius: 50%; border: 1px solid var(--c-line); background: #fff;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: all .25s; color: var(--c-ink);
}
.lightbox-close:hover { border-color: var(--c-primary); color: var(--c-primary); transform: rotate(90deg); }
.lightbox-close svg { width: 20px; height: 20px; }

/* ============ 产品详情页 ============ */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.detail-visual img { border-radius: var(--radius); border: 1px solid var(--c-line); background: #fff; }
.detail-cta { margin-top: 30px; }
.detail-sub { font-size: 15px; font-weight: 600; margin: 30px 0 12px; }
.detail-features { list-style: none; }
.detail-features li {
  padding: 9px 0 9px 26px; position: relative; color: var(--c-slate); font-size: 15px;
}
.detail-features li::before {
  content: ""; position: absolute; left: 2px; top: 17px; width: 12px; height: 7px;
  border-left: 2px solid var(--c-primary); border-bottom: 2px solid var(--c-primary);
  transform: rotate(-45deg);
}
.detail-sub-lg { font-size: 24px; font-weight: 700; margin-bottom: 26px; letter-spacing: -.01em; }
.specs-note { color: var(--c-muted); font-size: 13px; margin-bottom: 20px; }
.spec-table {
  width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--c-line);
  border-radius: var(--radius); overflow: hidden;
}
.spec-table th, .spec-table td { padding: 14px 22px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--c-line); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { color: var(--c-muted); font-weight: 500; width: 40%; background: var(--c-tint); }
.spec-table td { color: var(--c-ink); font-weight: 500; font-variant-numeric: tabular-nums; }
.related { margin-top: 80px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.detail-back { margin-top: 56px; }
.product-card { animation: cardIn .45s ease both; }

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .hero-inner, .quality-inner, .about-inner, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .cap-grid, .product-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: 1fr; }
  .detail-grid, .related-grid { grid-template-columns: 1fr; gap: 34px; }
  .detail-hero { padding: 120px 0 50px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .main-nav {
    position: fixed; top: 72px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: #fff; border-bottom: 1px solid var(--c-line); padding: 0 5%;
    max-height: 0; overflow: hidden; transition: max-height .35s ease;
  }
  .main-nav.open { max-height: 420px; }
  .main-nav a { padding: 16px 0; border-bottom: 1px solid var(--c-tint); }
  .menu-toggle { display: flex; }
}
@media (max-width: 600px) {
  .section { padding: 72px 0; }
  .hero { padding: 140px 0 70px; }
  .cap-grid, .product-grid { grid-template-columns: 1fr; }
  .category-grid, .related-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
}