:root {
  --c-primary: #0c447c;
  --c-primary-d: #083258;
  --c-accent: #0f6e56;
  --c-accent-l: #e1f5ee;
  --c-cta: #e8852b;
  --c-cta-d: #c66a14;
  --c-bg: #ffffff;
  --c-bg-2: #f4f7fb;
  --c-bg-3: #eaf1f9;
  --c-text: #1d2733;
  --c-muted: #5f6b7a;
  --c-border: #dbe3ee;
  --radius: 12px;
  --shadow: 0 6px 22px rgba(12, 68, 124, 0.08);
  --maxw: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, "Noto Sans", "Noto Sans Arabic", "Noto Sans Thai", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
  color: var(--c-text); background: var(--c-bg); line-height: 1.65; font-size: 16px;
}
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--c-primary); font-size: 18px; }
.brand .logo { width: 30px; height: 30px; border-radius: 7px; background: var(--c-primary); color: #fff; display: grid; place-items: center; font-size: 15px; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { color: var(--c-text); font-weight: 500; }
.nav-links a:hover { color: var(--c-primary); text-decoration: none; }
.nav-right { display: flex; align-items: center; gap: 12px; }

.lang-select { position: relative; }
.lang-select > button {
  background: var(--c-bg-2); border: 1px solid var(--c-border); color: var(--c-text);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 14px; display: flex; gap: 6px; align-items: center;
}
.lang-menu {
  position: absolute; right: 0; top: 110%; background: #fff; border: 1px solid var(--c-border);
  border-radius: 10px; box-shadow: var(--shadow); padding: 6px; min-width: 210px; display: none; grid-template-columns: 1fr 1fr;
}
.lang-menu.open { display: grid; }
.lang-menu a { padding: 8px 10px; border-radius: 6px; font-size: 14px; display: flex; gap: 8px; align-items: center; }
.lang-menu a:hover { background: var(--c-bg-3); text-decoration: none; }
.lang-flag { font-size: 16px; }

.btn { display: inline-block; padding: 12px 22px; border-radius: 9px; font-weight: 600; cursor: pointer; border: 0; font-size: 15px; }
.btn-primary { background: var(--c-cta); color: #fff; }
.btn-primary:hover { background: var(--c-cta-d); text-decoration: none; }
.btn-outline { background: transparent; border: 1px solid var(--c-primary); color: var(--c-primary); }
.btn-outline:hover { background: var(--c-bg-3); text-decoration: none; }

.hero { background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-d) 100%); color: #fff; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; right: -60px; top: -60px; width: 320px; height: 320px; border-radius: 50%; background: rgba(255, 255, 255, 0.06); }
.hero-inner { padding: 78px 0 86px; position: relative; z-index: 1; }
.hero .kicker { display: inline-block; background: rgba(255, 255, 255, 0.14); color: #cfe4ff; padding: 6px 14px; border-radius: 999px; font-size: 13px; letter-spacing: .3px; margin-bottom: 18px; }
.hero h1 { font-size: 40px; line-height: 1.18; margin: 0 0 18px; font-weight: 800; max-width: 760px; }
.hero p.sub { font-size: 18px; color: #dbe8f7; max-width: 660px; margin: 0 0 28px; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }

section { padding: 64px 0; }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; margin: 0 0 10px; color: var(--c-primary); }
.section-head p { color: var(--c-muted); margin: 0; font-size: 16px; }
.bg-soft { background: var(--c-bg-2); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.card .ic { width: 46px; height: 46px; border-radius: 10px; background: var(--c-accent-l); color: var(--c-accent); display: grid; place-items: center; font-size: 22px; margin-bottom: 14px; }
.card h3 { margin: 0 0 8px; font-size: 19px; color: var(--c-text); }
.card p { margin: 0; color: var(--c-muted); font-size: 15px; }

.product-card { display: flex; flex-direction: column; }
.product-card .tag { color: var(--c-accent); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .5px; }
.product-card h3 { font-size: 22px; margin: 6px 0 10px; }
.product-card p { flex: 1; }
.feat-list { list-style: none; padding: 0; margin: 14px 0 0; }
.feat-list li { padding: 6px 0 6px 24px; position: relative; color: var(--c-muted); font-size: 14px; }
.feat-list li::before { content: "✓"; position: absolute; left: 0; color: var(--c-accent); font-weight: 700; }

.cta-band { background: var(--c-accent); color: #fff; border-radius: var(--radius); padding: 42px; text-align: center; }
.cta-band h2 { margin: 0 0 10px; font-size: 26px; }
.cta-band p { margin: 0 0 22px; color: #d7f3ea; }

.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.wa-card { background: var(--c-accent-l); border: 1px solid #bfe6d6; border-radius: var(--radius); padding: 30px; text-align: center; }
.wa-card .wa-btn { display: inline-flex; gap: 10px; align-items: center; background: #25d366; color: #fff; padding: 14px 26px; border-radius: 10px; font-weight: 700; font-size: 16px; }
.wa-card .wa-btn:hover { background: #1ebe5b; text-decoration: none; }
form .field { margin-bottom: 16px; }
form label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
form input, form textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--c-border); border-radius: 8px; font-size: 15px; font-family: inherit; color: var(--c-text); }
form input:focus, form textarea:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-bg-3); }
.note { color: var(--c-muted); font-size: 14px; margin-top: 14px; }

.site-footer { background: var(--c-primary-d); color: #cfe0f2; padding: 40px 0 30px; margin-top: 20px; }
.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.site-footer a { color: #cfe0f2; }
.site-footer .copy { font-size: 14px; }
.site-footer .tag { font-size: 13px; color: #9db8d6; }

.wa-float { position: fixed; right: 22px; bottom: 22px; z-index: 60; background: #25d366; color: #fff; width: 58px; height: 58px; border-radius: 50%; display: grid; place-items: center; box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45); font-size: 30px; }
.wa-float:hover { background: #1ebe5b; text-decoration: none; }

.lang-chooser { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-d) 100%); padding: 40px 20px; }
.lang-chooser .box { background: #fff; border-radius: 16px; padding: 44px; max-width: 720px; width: 100%; box-shadow: var(--shadow); }
.lang-chooser h1 { color: var(--c-primary); text-align: center; margin: 0 0 8px; }
.lang-chooser p { text-align: center; color: var(--c-muted); margin: 0 0 28px; }
.lang-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.lang-grid a { display: flex; align-items: center; gap: 10px; padding: 16px; border: 1px solid var(--c-border); border-radius: 10px; font-weight: 600; color: var(--c-text); }
.lang-grid a:hover { border-color: var(--c-primary); background: var(--c-bg-3); text-decoration: none; }

.page-hero { background: var(--c-bg-3); padding: 46px 0; border-bottom: 1px solid var(--c-border); }
.page-hero h1 { margin: 0 0 8px; color: var(--c-primary); font-size: 34px; }
.page-hero p { margin: 0; color: var(--c-muted); max-width: 720px; }

.spec-note { background: #fff7e6; border: 1px solid #f3d28a; color: #8a5a00; border-radius: 8px; padding: 12px 16px; font-size: 14px; margin-top: 18px; }

@media (max-width: 860px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .nav-links { display: none; }
  .lang-grid { grid-template-columns: repeat(2, 1fr); }
}

[dir="rtl"] body { direction: rtl; text-align: right; }
[dir="rtl"] .nav { flex-direction: row-reverse; }
[dir="rtl"] .nav-links { flex-direction: row-reverse; }
[dir="rtl"] .lang-menu { left: 0; right: auto; }
[dir="rtl"] .feat-list li { padding: 6px 24px 6px 0; }
[dir="rtl"] .feat-list li::before { left: auto; right: 0; }
[dir="rtl"] .wa-float { right: auto; left: 22px; }
[dir="rtl"] form label, [dir="rtl"] .card .ic { text-align: right; }

/* Simplified Chinese tuning: CJK has no uppercase, needs looser leading and no letter tracking */
:lang(zh) body { line-height: 1.8; }
:lang(zh) .hero .kicker,
:lang(zh) .product-card .tag { letter-spacing: 0; text-transform: none; }
:lang(zh) .hero h1 { font-size: 38px; letter-spacing: -0.5px; }
:lang(zh) .hero p.sub { line-height: 1.85; }
:lang(zh) .btn { letter-spacing: 0; }

/* Application / industry blocks */
.kicker-line {
  display: inline-block; background: #fff; border: 1px solid var(--c-border); color: var(--c-accent);
  padding: 5px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; margin-bottom: 14px;
}
.page-hero .actions { margin-top: 20px; display: flex; gap: 12px; flex-wrap: wrap; }
.app-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.app-card {
  display: flex; gap: 14px; align-items: flex-start; padding: 18px; background: #fff;
  border: 1px solid var(--c-border); border-radius: var(--radius); box-shadow: var(--shadow);
  color: var(--c-text); transition: border-color .15s, transform .15s;
}
.app-card:hover { border-color: var(--c-primary); text-decoration: none; transform: translateY(-2px); }
.app-emoji { font-size: 24px; line-height: 1; }
.app-card-text { display: flex; flex-direction: column; gap: 4px; }
.app-card-text strong { font-size: 16px; color: var(--c-primary); }
.app-card-text small { color: var(--c-muted); font-size: 13px; line-height: 1.55; }
.card.pain .ic { background: #fdf1e0; color: #c66a14; }
.card.fit .ic { background: var(--c-accent-l); color: var(--c-accent); font-weight: 700; }
#apps { scroll-margin-top: 78px; }

@media (max-width: 1040px) {
  .nav-links { gap: 14px; font-size: 14px; }
  .nav-links a { font-size: 14px; }
}
@media (max-width: 860px) {
  .app-grid { grid-template-columns: 1fr; }
}

/* Series cards */
.series-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.series-card { display: flex; flex-direction: column; color: var(--c-text); }
.series-card:hover { border-color: var(--c-primary); text-decoration: none; }
.series-card h3 { color: var(--c-primary); }
.series-card .feat-list { flex: 1; }
.series-more { margin-top: 14px; font-weight: 600; font-size: 14px; color: var(--c-accent); }

/* Factory key figures */
.fact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 14px; }
.fact {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 18px 16px; text-align: center;
}
.fact strong { display: block; font-size: 26px; line-height: 1.15; color: var(--c-primary); font-weight: 700; }
.fact span { display: block; margin-top: 6px; font-size: 13px; color: var(--c-muted); }
:lang(zh) .fact strong { font-size: 24px; letter-spacing: 0; }

/* Spec table */
.spec-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius); background: #fff; -webkit-overflow-scrolling: touch; }
.spec-table { border-collapse: collapse; width: 100%; min-width: 820px; font-size: 14px; }
.spec-table th, .spec-table td { padding: 12px 14px; text-align: start; border-bottom: 1px solid var(--c-border); vertical-align: top; }
.spec-table thead th { background: var(--c-bg-3); color: var(--c-primary); font-weight: 600; white-space: nowrap; }
.spec-table thead th:not(:first-child) { text-align: center; }
.spec-table td { text-align: center; }
.spec-table tbody th { font-weight: 500; color: var(--c-text); width: 22%; white-space: nowrap; }
.spec-table tbody tr:last-child th, .spec-table tbody tr:last-child td { border-bottom: 0; }
.spec-table .unit { color: var(--c-muted); font-size: 12px; font-weight: 400; }
.spec-table .pending { color: #a8873f; background: #fff7e6; border: 1px solid #f3d28a; border-radius: 5px; padding: 1px 7px; font-size: 12px; white-space: nowrap; }
/* Keep the parameter name visible while scrolling 6 model columns on a phone. */
@media (max-width: 900px) {
  .spec-table tbody th, .spec-table thead th:first-child {
    position: sticky; inset-inline-start: 0; z-index: 2; background: #fff;
  }
  .spec-table thead th:first-child { background: var(--c-bg-3); }
}


/* Evidence tiles */
.ev-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.ev-tile { margin: 0; border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; background: #fff; }
.ev-tile img { width: 100%; height: 150px; object-fit: cover; display: block; }
.ev-tile figcaption { padding: 10px 14px; font-size: 13px; color: var(--c-muted); }
.ev-ph { height: 150px; display: grid; place-items: center; background: var(--c-bg-2); border-bottom: 1px dashed var(--c-border); color: #9aa7b6; font-size: 13px; text-align: center; padding: 0 12px; }
.ev-tile.ev-icon { display: flex; flex-direction: column; }
.ev-tile.ev-icon .ev-ic { height: 150px; display: grid; place-items: center; font-size: 46px; line-height: 1; background: linear-gradient(135deg, var(--c-accent-l), #fff); border-bottom: 1px solid var(--c-border); }
.ev-tile.ev-icon figcaption { font-weight: 600; color: var(--c-text); font-size: 14px; text-align: center; }
/* Local-only edit shortcut (auto-hidden on non-localhost) */
.edit-fab { position: fixed; inset-inline-start: 18px; bottom: 18px; z-index: 60; background: #111827; color: #fff; font-size: 13px; font-weight: 600; padding: 10px 16px; border-radius: 999px; text-decoration: none; box-shadow: 0 8px 24px rgba(0,0,0,.18); opacity: .82; transition: opacity .15s, transform .15s; }
.edit-fab:hover { opacity: 1; transform: translateY(-2px); text-decoration: none; color: #fff; }

/* Calculator */
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.calc-panel { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.calc-panel select { width: 100%; padding: 12px 14px; border: 1px solid var(--c-border); border-radius: 8px; font-size: 15px; font-family: inherit; background: #fff; color: var(--c-text); }
.corr { border: 1px solid var(--c-border); border-radius: 10px; padding: 12px 16px; margin: 4px 0 20px; }
.corr legend { font-size: 13px; font-weight: 600; padding: 0 6px; color: var(--c-muted); }
.corr label { display: flex; gap: 8px; align-items: center; font-weight: 400; font-size: 14px; margin: 8px 0; }
.corr input { width: auto; }
.calc-result { background: var(--c-bg-2); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 26px; }
.calc-result.is-done { border-color: var(--c-accent); background: var(--c-accent-l); }
.cr-label { font-size: 13px; color: var(--c-muted); text-transform: uppercase; letter-spacing: .4px; }
.cr-value { font-size: 30px; font-weight: 800; color: var(--c-primary); margin: 2px 0 0; }
.cr-sub { color: var(--c-muted); font-size: 14px; margin-bottom: 18px; }
.cr-rec { font-size: 18px; font-weight: 600; margin: 2px 0 20px; }
.cr-rec a { color: var(--c-accent); }
.cr-rec a:hover { text-decoration: underline; }
.calc-result .btn { display: inline-block; }

/* Cases */
.case-card h3 { color: var(--c-primary); font-size: 18px; }
.case-dl { margin: 12px 0 0; }
.case-dl dt { font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--c-accent); font-weight: 600; margin-top: 12px; }
.case-dl dd { margin: 2px 0 0; color: var(--c-muted); font-size: 15px; }

/* Lead form */
.grid-2-tight { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.lead-form { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.lp-form-wrap { max-width: 620px; margin: 0 auto; }
#lead { scroll-margin-top: 78px; }

@media (max-width: 860px) {
  .calc-grid { grid-template-columns: 1fr; }
  .grid-2-tight { grid-template-columns: 1fr; }
  .nav-links { gap: 12px; }
}
@media (max-width: 1100px) {
  .nav-links { gap: 13px; }
  .nav-links a { font-size: 14px; }
  .nav-right .btn-primary { padding: 10px 14px; font-size: 14px; }
}

/* ===== 工厂证据卡 内联编辑器（localhost 专用） ===== */
.ev-tile.ev-editable { position: relative; cursor: pointer; }
.ev-badge {
  position: absolute; top: 8px; right: 8px; z-index: 3;
  border: 0; border-radius: 999px; padding: 5px 11px; cursor: pointer;
  background: rgba(17,24,39,.82); color: #fff; font-size: 12.5px; font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,0,0,.25); backdrop-filter: blur(2px);
}
.ev-badge:hover { background: #111827; }
.ev-modal {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: rgba(15,23,42,.5); padding: 16px;
}
.ev-box {
  width: min(440px, 94vw); background: #fff; border-radius: 16px;
  overflow: hidden; box-shadow: 0 24px 60px rgba(15,23,42,.35);
  font: 14px/1.5 system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.ev-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; font-weight: 700; font-size: 15px;
  background: #0f172a; color: #fff;
}
.ev-x { background: transparent; border: 0; color: #fff; font-size: 22px; line-height: 1; cursor: pointer; }
.ev-body { padding: 16px 18px; }
.ev-body label { display: block; font-size: 12.5px; color: #475569; margin: 12px 0 4px; font-weight: 600; }
.ev-body input[type=text] {
  width: 100%; padding: 9px 11px; border: 1px solid #d3dae3; border-radius: 9px;
  font: inherit; box-sizing: border-box;
}
.ev-thumb {
  height: 140px; border-radius: 10px; border: 1px dashed #cbd5e1;
  display: grid; place-items: center; color: #94a3b8; font-size: 13px;
  background: #f8fafc; overflow: hidden;
}
.ev-actions { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.ev-btn {
  padding: 8px 14px; border-radius: 9px; border: 1px solid #d3dae3; background: #fff;
  cursor: pointer; font: inherit; font-size: 13px;
}
.ev-btn:hover { background: #f1f5f9; }
.ev-danger { color: #b42318; border-color: #f1c4bd; }
.ev-primary { background: #16a34a; color: #fff; border-color: #16a34a; font-weight: 600; }
.ev-primary:hover { background: #15803d; }
.ev-msg { margin-top: 12px; font-size: 12.5px; min-height: 16px; }
.ev-foot {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 14px 18px; border-top: 1px solid #eef2f7; background: #fbfdff;
}