/* =========================================================
   绿岭 Luling — Solar / Energy Export Site
   Design language: clean international B2B (light, airy,
   restrained teal accent, real photography, generous space)
   Brand color lives in :root — change --brand to re-skin.
   ========================================================= */

:root {
  --ink: #0f172a;          /* slate-900, primary text */
  --ink-2: #475569;        /* slate-600, muted text */
  --ink-3: #94a3b8;        /* slate-400, subtle */
  --line: #e6eaf0;         /* hairline borders */
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --brand: #0f766e;        /* teal-700 — clean-energy accent */
  --brand-600: #0d9488;
  --brand-50: #ecfdf9;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(15,23,42,.04), 0 10px 30px rgba(15,23,42,.06);
  --shadow-lg: 0 12px 40px rgba(15,23,42,.12);
  --maxw: 1200px;
  --header-h: 70px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -.02em; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
  transition: background .25s, box-shadow .25s, border-color .25s;
}
.site-header.scrolled { box-shadow: 0 6px 24px rgba(15,23,42,.06); }
.nav { height: var(--header-h); display: flex; align-items: center; gap: 22px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--ink); }
.brand .logo {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--brand), var(--brand-600));
  display: grid; place-items: center; color: #fff; flex: 0 0 auto;
}
.brand .logo-img {
  height: 36px; width: auto; object-fit: contain; flex: 0 0 auto;
}
.site-footer .brand .logo-img { height: 32px; }
.brand .en { color: var(--ink-3); font-weight: 600; font-size: 12.5px; letter-spacing: .6px; }
.nav-links { display: flex; gap: 2px; margin-left: auto; align-items: center; }
.nav-links a {
  padding: 9px 14px; border-radius: 9px; color: var(--ink);
  font-weight: 600; font-size: 15px; transition: background .15s, color .15s;
}
.nav-links a:hover { background: var(--bg-soft); color: var(--brand); }
.nav-links a.active { color: var(--brand); }

.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; margin-left: 6px; }
.lang-switch button {
  border: 0; background: #fff; padding: 7px 13px; cursor: pointer;
  font-size: 13px; font-weight: 700; color: var(--ink-2);
}
.lang-switch button.active { background: var(--brand); color: #fff; }

/* Header conversion CTA (pattern from top peers: Sungrow/GoodWe/Deye all surface a quote/contact button) */
.nav-links a.nav-cta {
  padding: 9px 18px; border-radius: 9px; margin-left: 6px;
  background: var(--brand); color: #fff; box-shadow: 0 6px 16px rgba(15,118,110,.25);
}
.nav-links a.nav-cta:hover { background: #0c5f58; color: #fff; }
/* Nav-CTA 始终保持青绿色实色（hero 上方也保留高对比度） */
.header--overlay:not(.scrolled) .nav-links a.nav-cta { background: var(--brand); color: #fff; box-shadow: 0 6px 18px rgba(15,118,110,.40); border: 1px solid rgba(255,255,255,.18); }
.header--overlay:not(.scrolled) .nav-links a.nav-cta:hover { background: #0c5f58; color: #fff; }

.nav-toggle { display: none; background: none; border: 0; font-size: 26px; cursor: pointer; margin-left: auto; color: var(--ink); }

/* Header transparent over hero (homepage only) — subtle dark tint so white text always readable */
.site-header.header--overlay:not(.scrolled) { background: rgba(8,20,28,.45); border-bottom-color: rgba(255,255,255,.12); backdrop-filter: saturate(180%) blur(8px); }
.site-header.header--overlay:not(.scrolled) .brand,
.site-header.header--overlay:not(.scrolled) .brand .en,
.site-header.header--overlay:not(.scrolled) .nav-links a:not(.nav-cta) { color: #fff; }
.site-header.header--overlay:not(.scrolled) .nav-links a:hover { color: #9fe9d8; background: transparent; }
.site-header.header--overlay:not(.scrolled) .nav-toggle { color: #fff; }
.site-header.header--overlay:not(.scrolled) .lang-switch { border-color: rgba(255,255,255,.35); }
.site-header.header--overlay:not(.scrolled) .lang-switch button { background: transparent; color: rgba(255,255,255,.85); }
.site-header.header--overlay:not(.scrolled) .lang-switch button.active { background: #fff; color: var(--brand); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 14px 26px; border-radius: 11px; font-weight: 700; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: transform .12s, box-shadow .15s, background .15s, color .15s;
}
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 8px 20px rgba(15,118,110,.25); }
.btn-primary:hover { background: #0c5f58; transform: translateY(-1px); }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-ghost.on-dark { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.45); color: #fff; }
.btn-ghost.on-dark:hover { background: #fff; color: var(--brand); }

/* ---------- Hero (homepage) ---------- */
.hero {
  position: relative; min-height: clamp(560px, 88vh, 780px);
  display: flex; align-items: center;
  background-image:
    linear-gradient(180deg, rgba(8,20,28,.60) 0%, rgba(8,20,28,.40) 50%, rgba(8,20,28,.72) 100%),
    url(../assets/hero-residential.jpg);
  background-size: cover; background-position: center;
  color: #fff;
}
.hero-inner { max-width: 760px; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.30);
  border-radius: 999px; padding: 7px 15px; font-size: 13px; font-weight: 700; margin-bottom: 22px;
  backdrop-filter: blur(4px);
}
.hero h1 { font-size: clamp(32px, 5.4vw, 56px); margin: 0 0 18px; font-weight: 800; text-shadow: 0 2px 18px rgba(0,0,0,.25); }
.hero .lead { font-size: clamp(16px, 2vw, 19px); color: rgba(255,255,255,.9); max-width: 620px; margin: 0 0 30px; }
.hero .cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 44px; margin-top: 48px; flex-wrap: wrap; }
.hero-stats .stat .num { font-size: clamp(26px, 3vw, 36px); font-weight: 800; color: #fff; }
.hero-stats .stat .lbl { font-size: 14px; color: rgba(255,255,255,.82); }

/* ---------- Trust strip (certifications) ---------- */
.trust-strip { border-bottom: 1px solid var(--line); background: #fff; padding: 20px 0; }
.trust-strip .inner { display: flex; gap: 30px; justify-content: center; align-items: center; flex-wrap: wrap; }
.trust-strip .lab { font-size: 13px; font-weight: 700; color: var(--ink-3); text-transform: uppercase; letter-spacing: 1px; margin-right: 4px; }
.trust-strip .tt { font-weight: 800; color: var(--ink-2); letter-spacing: .4px; font-size: 15px; }

/* ---------- Sections ---------- */
.section { padding: clamp(64px, 9vw, 108px) 0; }
.section.soft { background: var(--bg-soft); }
.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.section-head .kicker { color: var(--brand); font-weight: 800; font-size: 13px; letter-spacing: 1.6px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(26px, 3.6vw, 40px); margin: 12px 0 12px; }
.section-head p { color: var(--ink-2); font-size: 17px; margin: 0; }

/* ---------- Value / why-us cards ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.value {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s;
}
.value:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.value .num { font-size: 14px; font-weight: 800; color: var(--brand); letter-spacing: 1px; }
.value h3 { margin: 12px 0 8px; font-size: 19px; }
.value p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* ---------- Split (image + text) ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split .media img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
.split.reverse .media { order: 2; }
.split h2 { font-size: clamp(24px, 3vw, 34px); margin: 0 0 16px; }
.split p { color: var(--ink-2); margin: 0 0 14px; }
.split .mini-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 12px; }
.split .mini-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--ink); }
.split .mini-list .dot { color: var(--brand); font-weight: 800; }

/* ---------- Products ---------- */
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s;
  display: flex; flex-direction: column;
}
.product:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.product .thumb { aspect-ratio: 4 / 3; background: var(--bg-soft); overflow: hidden; display: grid; place-items: center; }
.product .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.product:hover .thumb img { transform: scale(1.06); }
.product .thumb-emoji { font-size: 52px; }
.product .body { padding: 22px; display: flex; flex-direction: column; gap: 9px; flex: 1; }
.product h3 { margin: 0; font-size: 18px; }
.product .desc { color: var(--ink-2); font-size: 14px; margin: 0; flex: 1; }
.product .meta { font-size: 13px; color: var(--brand); font-weight: 700; }
.product .certs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 2px; }
.cert-tag {
  font-size: 11px; font-weight: 700; letter-spacing: .3px;
  color: var(--brand); background: var(--brand-50);
  border: 1px solid #cdeee7; border-radius: 999px; padding: 3px 9px;
}
.product .more { margin-top: 6px; align-self: flex-start; color: var(--brand-600); font-weight: 700; font-size: 14px; }

/* ---------- Cases / Case studies ---------- */
.note-banner {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--brand-50); border: 1px solid #cdeee7; border-radius: var(--radius-sm);
  padding: 16px 18px; color: #0c5f58; font-size: 14.5px;
}
.note-banner .nb-ic { font-size: 20px; line-height: 1.4; }
.note-banner p { margin: 0; }

.cases { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.cases.cases--preview { grid-template-columns: repeat(3, 1fr); }
.case-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s;
  display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-card .thumb { aspect-ratio: 16 / 9; overflow: hidden; background: var(--bg-soft); }
.case-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.case-card:hover .thumb img { transform: scale(1.05); }
.case-card .body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 11px; flex: 1; }
.case-card .sector { font-size: 12px; font-weight: 800; color: var(--brand); letter-spacing: 1.2px; text-transform: uppercase; }
.case-card h3 { margin: 0; font-size: 19px; line-height: 1.3; }
.case-card .row { margin: 0; font-size: 14.5px; color: var(--ink-2); }
.case-card .row b { color: var(--brand); font-weight: 800; }
.case-card .outcome { list-style: none; padding: 0; margin: 4px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.case-card .outcome li { font-size: 12.5px; font-weight: 700; color: var(--brand); background: var(--brand-50); border: 1px solid #cdeee7; border-radius: 999px; padding: 4px 11px; }
.case-card .more { margin-top: 4px; align-self: flex-start; color: var(--brand-600); font-weight: 700; font-size: 14px; }

/* ---------- Stats band (dark teal) ---------- */
.stat-band {
  background: linear-gradient(120deg, #0c5f58, #0d9488); color: #fff;
  border-radius: 22px; padding: clamp(38px, 5vw, 58px);
}
.stat-band .grid { gap: 26px; }
.stat-band .num { font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.stat-band .lbl { color: rgba(255,255,255,.85); font-size: 14px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, #0b2724, #0f766e); color: #fff;
  border-radius: 22px; padding: clamp(40px, 6vw, 66px); text-align: center;
}
.cta-band h2 { font-size: clamp(24px, 3.4vw, 38px); margin: 0 0 12px; }
.cta-band p { color: rgba(255,255,255,.85); max-width: 620px; margin: 0 auto 26px; }
.cta-band .cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Page hero (sub pages) ---------- */
.page-hero {
  position: relative;
  background-image: linear-gradient(180deg, rgba(8,20,28,.55), rgba(8,20,28,.66)), url(../assets/prod-cabinet-factory.jpg);
  background-size: cover; background-position: center; color: #fff;
  padding: clamp(72px, 10vw, 120px) 0;
}
.page-hero .kicker { color: #9fe9d8; font-weight: 800; font-size: 13px; letter-spacing: 1.6px; text-transform: uppercase; }
.page-hero h1 { font-size: clamp(28px, 4.6vw, 48px); margin: 12px 0 12px; }
.page-hero p { color: rgba(255,255,255,.85); max-width: 660px; margin: 0; }

/* ---------- Video (production / interviews) ---------- */
.video-feature { display: grid; grid-template-columns: 1.45fr 1fr; gap: 40px; align-items: center; }
.video-feature .vf-text h3 { font-size: clamp(22px, 3vw, 32px); margin: 0 0 14px; }
.video-feature .vf-text p { color: var(--ink-2); margin: 0 0 18px; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; margin-top: 8px; }
.video-embed {
  position: relative; width: 100%; aspect-ratio: 16 / 9;
  background: #0b1b2a; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-placeholder { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 9px; text-align: center; padding: 22px;
  background: radial-gradient(120% 120% at 50% 0%, #123042, #0a1c29); }
.video-placeholder .vp-ic { font-size: 40px; }
.video-placeholder .vp-t { font-weight: 800; color: #eaf3ee; font-size: 17px; }
.video-placeholder .vp-hint { font-size: 13px; color: #9bc1ff; }

.interview { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.interview .video-embed { border-radius: 0; }
.interview .body { padding: 16px 18px 18px; }
.interview .body h4 { margin: 0 0 4px; font-size: 16px; }
.interview .body p { margin: 0; color: var(--ink-2); font-size: 14px; }
.interview .role { color: var(--brand); font-weight: 700; font-size: 13px; }

/* ---------- Cert chips (about page) ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cert-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 22px; text-align: center; box-shadow: var(--shadow); }
.cert-card .code { font-size: 22px; font-weight: 800; color: var(--brand); }
.cert-card .desc { font-size: 13px; color: var(--ink-2); margin-top: 4px; }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 700; }
.field input, .field select, .field textarea {
  padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  font: inherit; background: #fff; color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--brand-50); border-color: var(--brand); }
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 13px; color: var(--ink-2); }
.form-ok { display: none; background: var(--brand-50); border: 1px solid #b7e6da; color: #0c5f58; padding: 14px 16px; border-radius: 10px; font-weight: 600; }

.contact-wrap { display: grid; grid-template-columns: 1fr 1.15fr; gap: 44px; align-items: start; }
.info-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; }
.info-list li { display: flex; gap: 14px; align-items: flex-start; }
.info-list .ic { width: 42px; height: 42px; border-radius: 11px; background: var(--brand-50); color: var(--brand); display: grid; place-items: center; font-size: 18px; flex: 0 0 auto; }
.info-list .t { font-weight: 700; }
.info-list .s { color: var(--ink-2); font-size: 14px; word-break: break-word; }

/* ---------- Footer ---------- */
.site-footer { background: #0b1620; color: #c3d0d8; padding: 60px 0 30px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; font-size: 15px; margin: 0 0 14px; }
.site-footer a { color: #c3d0d8; display: block; padding: 5px 0; font-size: 14px; transition: color .15s; }
.site-footer a:hover { color: #fff; }
.footer-brand p { color: #93a7b2; font-size: 14px; max-width: 320px; }
.footer-contact { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 16px; }
.footer-contact a { color: #cfe9e6; font-size: 13.5px; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.footer-contact a:hover { color: #fff; }
.social-links { display: flex; gap: 10px; margin-top: 16px; }
.social-links a { width: 40px; height: 40px; border-radius: 11px; background: rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center; transition: background .18s, transform .18s; }
.social-links a:hover { background: var(--brand-600); transform: translateY(-2px); }
.social-links svg { display: block; }
.footer-bottom { border-top: 1px solid #1c2c39; margin-top: 38px; padding-top: 20px; font-size: 13px; color: #7f95a1; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- Bilingual (SEO: both languages in DOM) ---------- */
.t-zh { display: inline; }
.t-en { display: none; }
html[lang="en"] .t-zh { display: none; }
html[lang="en"] .t-en { display: inline; }
/* block-level bilingual wrappers */
.bi-zh { display: block; } .bi-en { display: none; }
html[lang="en"] .bi-zh { display: none; }
html[lang="en"] .bi-en { display: block; }

img[loading="lazy"] { background: #eef2f5; }

/* ---------- About band / scenario tags / timeline / service list ---------- */
.about-band .cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

.scenario-tags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.scenario-tags a {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; border: 1px solid var(--line); border-radius: 999px;
  font-weight: 700; font-size: 15px; color: var(--ink); background: #fff;
  transition: border-color .15s, color .15s, transform .12s, box-shadow .15s;
}
.scenario-tags a:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); box-shadow: var(--shadow); }
.scenario-tags a::before { content: "→"; color: var(--brand); font-weight: 800; }

/* timeline (company milestone) */
.timeline { display: grid; gap: 0; max-width: 880px; margin: 0 auto; }
.tl-item { display: grid; grid-template-columns: 130px 1fr; gap: 24px; padding: 22px 0; border-top: 1px solid var(--line); }
.tl-item:first-child { border-top: 0; }
.tl-year { font-weight: 800; color: var(--brand); font-size: 18px; }
.tl-body h3 { margin: 0 0 6px; font-size: 18px; }
.tl-body p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* service list (contact page "what we can do for you") */
.service-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 14px; }
.service-list li {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: #fff;
}
.service-list .si { font-size: 22px; line-height: 1.2; }
.service-list .st { font-weight: 700; }
.service-list .ss { color: var(--ink-2); font-size: 14px; margin-top: 2px; }
.service-list a { color: var(--brand); font-weight: 700; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid-3, .grid-4, .products, .cert-grid, .cases.cases--preview { grid-template-columns: repeat(2, 1fr); }
  .split, .video-feature, .contact-wrap { grid-template-columns: 1fr; }
  .split.reverse .media { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--line); padding: 12px; gap: 2px;
    transform: translateY(-130%); transition: transform .2s; box-shadow: var(--shadow); z-index: 49;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { color: var(--ink) !important; }
  .nav-links a.nav-cta { color: #fff !important; background: var(--brand) !important; margin: 6px 0 2px; text-align: center; }
  .nav-toggle { display: block; }
  .grid-3, .grid-4, .products, .cert-grid, .grid-2, .form-grid, .cases, .cases.cases--preview { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: 78vh; }
  .hero-stats { gap: 26px; }
}

/* ---------- Gallery / image wall (真实产品图墙) ---------- */
.gallery-band { padding: clamp(56px, 8vw, 96px) 0; }
.gallery-band.alt { background: var(--bg-soft); }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}
.gallery-grid .gi {
  position: relative; aspect-ratio: 1/1;
  border-radius: 14px; overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer; background: #0f172a;
}
.gallery-grid .gi img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .35s ease;
}
.gallery-grid .gi:hover img { transform: scale(1.06); }
.gallery-grid .gi::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(8,20,28,.78) 0%, rgba(8,20,28,.0) 55%);
}
.gallery-grid .gi .gl {
  position: absolute; left: 14px; right: 14px; bottom: 12px;
  z-index: 1; color: #fff;
  font-weight: 700; font-size: 13px;
  text-shadow: 0 1px 6px rgba(0,0,0,.4);
}
.gallery-grid .gi .gt {
  position: absolute; left: 14px; top: 12px; z-index: 1;
  display: inline-block; padding: 4px 10px;
  background: rgba(255,255,255,.92); color: var(--brand);
  border-radius: 999px; font-size: 11px; font-weight: 800;
  letter-spacing: .4px;
}
@media (max-width: 980px) {
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
}

/* ---------- Big feature image (about page 单张大图) ---------- */
.feature-image {
  position: relative; border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-lg);
}
.feature-image img { width: 100%; height: auto; display: block; }
.feature-image .fi-caption {
  position: absolute; left: 24px; bottom: 22px; right: 24px;
  color: #fff; z-index: 1;
  text-shadow: 0 1px 12px rgba(0,0,0,.5);
}
.feature-image .fi-caption .kicker { color: #9fe9d8; font-weight: 800; font-size: 12px; letter-spacing: 1.6px; text-transform: uppercase; margin-bottom: 6px; }
.feature-image .fi-caption h3 { margin: 0 0 6px; font-size: clamp(22px, 3vw, 30px); }
.feature-image .fi-caption p { margin: 0; font-size: 15px; color: rgba(255,255,255,.92); max-width: 540px; }
.feature-image::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(8,20,28,.10) 30%, rgba(8,20,28,.78) 100%);
  pointer-events: none;
}

/* cases 页 顶部大图横幅 */
.cases-hero {
  position: relative; overflow: hidden;
  height: clamp(280px, 38vh, 420px);
  margin-bottom: 0;
  background-size: cover; background-position: center;
}
.cases-hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(8,20,28,.35) 0%, rgba(8,20,28,.78) 100%);
}
.cases-hero .ch-inner {
  position: relative; z-index: 1;
  height: 100%; display: flex; align-items: center;
  color: #fff;
}
.cases-hero .ch-inner h2 { color: #fff; margin: 8px 0 8px; font-size: clamp(26px, 4vw, 38px); }
.cases-hero .ch-inner p { color: rgba(255,255,255,.92); max-width: 640px; margin: 0; }
.cases-hero .ch-inner .kicker { color: #9fe9d8; font-weight: 800; font-size: 13px; letter-spacing: 1.6px; text-transform: uppercase; }