/* ============================================================
   金灏石材 · 官方网站
   响应式站点样式
   ============================================================ */

:root {
  --ink: #201d1b;
  --ink-2: #3a3330;
  --brown-900: #3a2415;
  --brown-800: #4c2f1d;
  --brown-700: #6a3e2b;
  --brown-500: #8b5e3c;
  --sand-100: #f7f3ec;
  --sand-200: #efe9df;
  --sand-300: #e3dacb;
  --gold: #b98a4f;
  --gold-2: #d4b183;
  --white: #ffffff;
  --muted: #7d746b;
  --line: rgba(32, 29, 27, .12);
  --shadow: 0 18px 50px rgba(58, 36, 21, .14);
  --radius: 14px;
  --maxw: 1240px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-en: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: min(var(--maxw), 92%); margin: 0 auto; }
::selection { background: var(--gold); color: #fff; }

/* ---------- 顶部信息条 ---------- */
.topbar {
  background: var(--brown-900);
  color: rgba(255,255,255,.82);
  font-size: 13px;
  letter-spacing: .04em;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; height: 36px; }
.topbar a { color: rgba(255,255,255,.82); }
.topbar a:hover { color: var(--gold-2); }
.topbar .tb-right { display: flex; gap: 22px; align-items: center; }
.topbar .tb-right .sep { opacity: .35; }

/* ---------- 主导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 200;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.header.scrolled { box-shadow: 0 8px 30px rgba(58,36,21,.10); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img.logo { height: 46px; width: auto; }
.brand .brand-txt { line-height: 1.15; }
.brand .brand-txt b { display: block; font-size: 20px; font-weight: 700; letter-spacing: .12em; color: var(--brown-900); }
.brand .brand-txt span { font-size: 11px; letter-spacing: .28em; color: var(--muted); }

.nav { display: flex; gap: 4px; }
.nav > li { position: relative; }
.nav > li > a {
  display: flex; align-items: center; gap: 5px;
  padding: 10px 15px;
  font-size: 15px; color: var(--ink);
  border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav > li > a:hover, .nav > li.active > a { color: var(--brown-700); background: var(--sand-100); }
.nav > li > a .arrow { font-size: 9px; color: var(--muted); transform: rotate(90deg); transition: transform .25s; }
.nav > li:hover > a .arrow { transform: rotate(-90deg); }

.nav .sub {
  position: absolute; top: calc(100% + 10px); left: 0;
  min-width: 210px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 8px;
  opacity: 0; visibility: hidden;
  transform: translateY(8px);
  transition: all .25s ease;
}
.nav > li:hover .sub, .nav > li:focus-within .sub { opacity: 1; visibility: visible; transform: translateY(0); }
.nav .sub a {
  display: block; padding: 9px 14px; font-size: 14px;
  border-radius: 6px; color: var(--ink-2);
}
.nav .sub a:hover { background: var(--sand-100); color: var(--brown-700); padding-left: 18px; }

.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-cta .btn { padding: 9px 20px; font-size: 14px; }
.nav-cta .lang { font-size: 13px; color: var(--muted); letter-spacing: .1em; }
.nav-cta .lang:hover { color: var(--brown-700); }

/* 汉堡按钮 */
.burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; background: none; border: 0; }
.burger span { width: 24px; height: 2px; background: var(--brown-900); border-radius: 2px; transition: .3s; }
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px; font-weight: 500;
  letter-spacing: .08em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .25s;
}
.btn-light { background: var(--white); color: var(--brown-900); }
.btn-light:hover { background: var(--gold-2); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-dark { background: var(--brown-900); color: #fff; }
.btn-dark:hover { background: var(--brown-700); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-ghost { border-color: rgba(255,255,255,.65); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.14); }
.btn-arrow::after { content: "→"; font-size: 16px; transition: transform .25s; }
.btn-arrow:hover::after { transform: translateX(5px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: min(78vh, 760px);
  display: flex; align-items: center;
  color: #fff;
  overflow: hidden;
  background: var(--brown-900);
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(32,20,12,.78) 0%, rgba(32,20,12,.45) 45%, rgba(32,20,12,.15) 100%);
}
.hero .container { position: relative; z-index: 2; padding: 90px 0; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 13px; letter-spacing: .42em;
  color: var(--gold-2);
  margin-bottom: 26px;
}
.hero .eyebrow::before { content: ""; width: 44px; height: 1px; background: var(--gold-2); }
.hero h1 {
  font-size: clamp(34px, 5.2vw, 64px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: .06em;
  max-width: 16em;
}
.hero h1 .accent { color: var(--gold-2); }
.hero p {
  margin-top: 22px;
  font-size: clamp(15px, 1.6vw, 19px);
  max-width: 34em;
  color: rgba(255,255,255,.88);
  letter-spacing: .05em;
}
.hero .actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero .hero-meta {
  margin-top: 56px;
  display: flex; gap: 44px; flex-wrap: wrap;
  border-top: 1px solid rgba(255,255,255,.22);
  padding-top: 26px;
}
.hero .hero-meta .hm b { display: block; font-family: var(--font-en); font-size: 30px; color: #fff; }
.hero .hero-meta .hm span { font-size: 13px; color: rgba(255,255,255,.72); letter-spacing: .1em; }
.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  z-index: 2; color: rgba(255,255,255,.75); font-size: 11px; letter-spacing: .3em;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.scroll-hint::after { content: ""; width: 1px; height: 34px; background: rgba(255,255,255,.5); animation: drop 1.6s infinite; }
@keyframes drop { 0% { transform: scaleY(0); transform-origin: top; } 45% { transform: scaleY(1); transform-origin: top; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section.sand { background: var(--sand-100); }
.section.dark { background: var(--brown-900); color: #fff; }
.section.dark .sec-sub { color: rgba(255,255,255,.62); }
.sec-head { margin-bottom: 54px; }
.sec-head.center { text-align: center; }
.sec-head .en {
  font-family: var(--font-en);
  font-size: 12px; letter-spacing: .5em;
  color: var(--gold);
  text-transform: uppercase;
}
.sec-head h2 {
  margin-top: 12px;
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 700; letter-spacing: .08em;
}
.sec-head h2 .thin { font-weight: 300; color: var(--muted); }
.sec-head .line { width: 52px; height: 3px; background: var(--gold); margin-top: 18px; }
.sec-head.center .line { margin-left: auto; margin-right: auto; }
.sec-sub { margin-top: 16px; color: var(--muted); max-width: 44em; }
.sec-head.center .sec-sub { margin-left: auto; margin-right: auto; }
.sec-head.row { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.sec-head.row .sec-sub { max-width: 34em; }

/* ---------- 业务板块卡片 ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.biz-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 4.6;
  color: #fff;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 30px 28px;
  isolation: isolate;
  transition: transform .35s ease, box-shadow .35s ease;
}
.biz-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform .6s ease; }
.biz-card::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(20,12,7,0) 30%, rgba(20,12,7,.88) 100%);
  transition: opacity .3s;
}
.biz-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.biz-card:hover img { transform: scale(1.06); }
.biz-card .b-en {
  font-family: var(--font-en); font-size: 11px; letter-spacing: .34em;
  color: var(--gold-2); text-transform: uppercase;
}
.biz-card h3 { font-size: 24px; font-weight: 700; letter-spacing: .14em; margin: 8px 0 10px; }
.biz-card p { font-size: 13.5px; color: rgba(255,255,255,.82); line-height: 1.8; }
.biz-card .b-more {
  margin-top: 18px; display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; letter-spacing: .18em; color: var(--gold-2);
}
.biz-card .b-more::after { content: "→"; transition: transform .25s; }
.biz-card:hover .b-more::after { transform: translateX(5px); }

/* ---------- 数据条 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.stat b {
  font-family: var(--font-en);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700; color: #fff;
  display: inline-flex; align-items: baseline; line-height: 1;
}
.stat b em { font-style: normal; font-size: .5em; color: var(--gold-2); margin-left: 4px; }
.stat span { display: block; margin-top: 12px; font-size: 14px; letter-spacing: .2em; color: rgba(255,255,255,.75); }
.stat + .stat { border-left: 1px solid rgba(255,255,255,.14); }

/* ---------- 图文板块 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split .media { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.split .media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.split .media .tag {
  position: absolute; left: 18px; top: 18px;
  background: rgba(255,255,255,.9); color: var(--brown-900);
  font-size: 12px; letter-spacing: .2em; padding: 6px 14px; border-radius: 999px;
}
.split .txt .en-label { font-family: var(--font-en); font-size: 12px; letter-spacing: .4em; color: var(--gold); text-transform: uppercase; }
.split .txt h2 { font-size: clamp(24px, 2.6vw, 34px); margin: 14px 0 20px; letter-spacing: .06em; line-height: 1.4; }
.split .txt p { color: var(--ink-2); margin-bottom: 14px; font-size: 15px; }
.split .txt ul.features { margin: 18px 0 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; }
.split .txt ul.features li { display: flex; gap: 10px; font-size: 14px; color: var(--ink-2); }
.split .txt ul.features li::before { content: "✓"; color: var(--gold); font-weight: 700; }

/* ---------- 产品 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.prod-card { position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 3/4; color: #fff; display: flex; align-items: flex-end; }
.prod-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.prod-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,12,7,0) 45%, rgba(20,12,7,.8) 100%); }
.prod-card:hover img { transform: scale(1.07); }
.prod-card .p-info { position: relative; z-index: 1; padding: 26px 24px; width: 100%; }
.prod-card .p-no { font-family: var(--font-en); font-size: 13px; letter-spacing: .3em; color: var(--gold-2); }
.prod-card .p-name { font-size: 22px; font-weight: 700; letter-spacing: .12em; margin-top: 6px; }
.prod-card .p-en { font-family: var(--font-en); font-size: 12px; letter-spacing: .2em; color: rgba(255,255,255,.75); text-transform: uppercase; margin-top: 4px; }
.prod-card .p-more { position: absolute; right: 22px; bottom: 30px; width: 42px; height: 42px; border-radius: 50%; border: 1px solid rgba(255,255,255,.5); display: grid; place-items: center; transition: all .3s; }
.prod-card:hover .p-more { background: var(--gold-2); border-color: var(--gold-2); transform: translateX(4px); }

/* ---------- 品牌条 ---------- */
.brand-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.brand-item {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; padding: 26px 18px; text-align: center;
  transition: all .3s;
}
.brand-item:hover { border-color: var(--gold); transform: translateY(-5px); box-shadow: var(--shadow); }
.brand-item b { display: block; font-size: 17px; letter-spacing: .1em; color: var(--brown-900); }
.brand-item span { font-size: 12px; color: var(--muted); letter-spacing: .14em; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { border-radius: var(--radius); overflow: hidden; background: #fff; border: 1px solid var(--line); transition: all .3s; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.news-card .n-img { aspect-ratio: 16/9; overflow: hidden; }
.news-card .n-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .n-img img { transform: scale(1.06); }
.news-card .n-body { padding: 22px 24px 26px; }
.news-card .n-date { font-family: var(--font-en); font-size: 12px; letter-spacing: .16em; color: var(--gold); }
.news-card h3 { font-size: 17px; margin: 8px 0 10px; line-height: 1.55; font-weight: 600; }
.news-card p { font-size: 13.5px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .n-more { margin-top: 14px; font-size: 13px; color: var(--brown-700); display: inline-flex; align-items: center; gap: 6px; }
.news-card .n-more::after { content: "→"; }

/* ---------- 时间线 ---------- */
.timeline { position: relative; max-width: 880px; margin: 0 auto; padding-left: 0; }
.timeline::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: var(--line); transform: translateX(-50%); }
.tl-item { position: relative; width: 50%; padding: 0 44px 54px; }
.tl-item:nth-child(odd) { left: 0; text-align: right; }
.tl-item:nth-child(even) { left: 50%; text-align: left; }
.tl-item::before {
  content: ""; position: absolute; top: 6px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--gold); border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--gold);
}
.tl-item:nth-child(odd)::before { right: -8px; }
.tl-item:nth-child(even)::before { left: -7px; }
.tl-item .tl-year { font-family: var(--font-en); font-size: 26px; font-weight: 700; color: var(--brown-700); }
.tl-item h4 { font-size: 17px; margin: 6px 0 8px; letter-spacing: .05em; }
.tl-item p { font-size: 14px; color: var(--muted); }

/* ---------- 荣誉 ---------- */
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.honor {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 22px; text-align: center; background: #fff;
  transition: all .3s;
}
.honor:hover { border-color: var(--gold); transform: translateY(-5px); box-shadow: var(--shadow); }
.honor .h-icon { font-size: 34px; }
.honor b { display: block; margin: 14px 0 8px; font-size: 15px; letter-spacing: .06em; }
.honor span { font-size: 13px; color: var(--muted); }

/* ---------- 联系表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; }
.c-info .ci-item { display: flex; gap: 18px; margin-bottom: 30px; }
.c-info .ci-item .ci-ico {
  width: 52px; height: 52px; flex: none;
  border-radius: 12px; background: var(--sand-100);
  display: grid; place-items: center; font-size: 20px;
  border: 1px solid var(--line);
}
.c-info .ci-item b { display: block; font-size: 15px; letter-spacing: .05em; }
.c-info .ci-item span, .c-info .ci-item a { font-size: 14px; color: var(--muted); }
.c-info .ci-item a:hover { color: var(--brown-700); }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form .full { grid-column: 1 / -1; }
.form input, .form select, .form textarea {
  width: 100%; padding: 13px 16px;
  border: 1px solid var(--line); border-radius: 10px;
  font-family: var(--font); font-size: 14px;
  background: #fff; color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(185,138,79,.18);
}
.form textarea { resize: vertical; min-height: 120px; }
.form .btn { justify-content: center; }

/* ---------- 页脚 ---------- */
.footer { background: #16120e; color: rgba(255,255,255,.72); }
.footer-top { padding: 70px 0 44px; display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; }
.footer h4 { color: #fff; font-size: 15px; letter-spacing: .18em; margin-bottom: 20px; font-weight: 600; }
.footer ul li { margin-bottom: 10px; font-size: 13.5px; }
.footer ul a:hover { color: var(--gold-2); }
.footer .f-brand .logo { height: 40px; margin-bottom: 18px; }
.footer .f-brand p { font-size: 13.5px; line-height: 2; max-width: 26em; }
.footer .f-contact li { display: flex; gap: 10px; margin-bottom: 14px; font-size: 13.5px; }
.footer .f-qr { display: flex; gap: 20px; }
.footer .f-qr .qr-box { text-align: center; }
.footer .f-qr img { width: 108px; height: 108px; border-radius: 10px; background: #fff; padding: 6px; }
.footer .f-qr span { display: block; margin-top: 8px; font-size: 12px; letter-spacing: .1em; }
.footer .f-social { display: flex; gap: 12px; margin-top: 22px; }
.footer .f-social a {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.22);
  display: grid; place-items: center; font-size: 14px;
  transition: all .25s;
}
.footer .f-social a:hover { background: var(--gold); border-color: var(--gold); color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 22px 0; font-size: 12.5px; color: rgba(255,255,255,.5); }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-bottom a:hover { color: var(--gold-2); }

/* ---------- 内页横幅 ---------- */
.page-hero {
  position: relative; color: #fff; overflow: hidden;
  background: var(--brown-900);
  padding: 110px 0 90px;
}
.page-hero img.bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .55; }
.page-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(26,16,10,.35), rgba(26,16,10,.8)); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero .crumb { font-size: 13px; letter-spacing: .2em; color: rgba(255,255,255,.7); margin-bottom: 16px; }
.page-hero .crumb a:hover { color: var(--gold-2); }
.page-hero h1 { font-size: clamp(30px, 4vw, 46px); letter-spacing: .1em; font-weight: 700; }
.page-hero p { margin-top: 14px; max-width: 40em; color: rgba(255,255,255,.82); font-size: 15px; }

/* ---------- 面包屑下工具条 ---------- */
.subnav { border-bottom: 1px solid var(--line); background: var(--sand-100); }
.subnav .container { display: flex; gap: 6px; overflow-x: auto; padding: 14px 0; }
.subnav a { flex: none; padding: 8px 18px; font-size: 14px; border-radius: 999px; color: var(--ink-2); }
.subnav a:hover, .subnav a.active { background: var(--brown-900); color: #fff; }

/* ---------- 回到顶部 ---------- */
#toTop {
  position: fixed; right: 26px; bottom: 26px; z-index: 150;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--brown-900); color: #fff; border: 0; cursor: pointer;
  font-size: 16px; display: grid; place-items: center;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .3s;
  box-shadow: var(--shadow);
}
#toTop.show { opacity: 1; visibility: visible; transform: translateY(0); }
#toTop:hover { background: var(--brown-700); }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .biz-grid, .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 860px) {
  .topbar { display: none; }
  .nav {
    position: fixed; top: 76px; left: 0; right: 0; bottom: 0; z-index: 190;
    flex-direction: column; background: #fff;
    padding: 24px 6vw 60px; overflow-y: auto;
    transform: translateX(100%); transition: transform .35s ease;
  }
  .nav.open { transform: translateX(0); box-shadow: -20px 0 60px rgba(0,0,0,.12); }
  .nav > li > a { font-size: 17px; padding: 14px 12px; border-bottom: 1px solid var(--line); }
  .nav .sub { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding: 0 0 6px 22px; min-width: 0; display: none; }
  .nav > li.open .sub { display: block; }
  .nav > li > a .arrow { transform: rotate(0); }
  .nav > li.open > a .arrow { transform: rotate(90deg); }
  .nav-cta .lang { display: none; }
  .burger { display: flex; }
  .stats { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .stat + .stat { border-left: 0; }
  .brand-strip { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline::before { left: 8px; }
  .tl-item, .tl-item:nth-child(odd), .tl-item:nth-child(even) { width: 100%; left: 0; text-align: left; padding: 0 0 40px 36px; }
  .tl-item::before, .tl-item:nth-child(odd)::before, .tl-item:nth-child(even)::before { left: 0; right: auto; }
  .section { padding: 68px 0; }
}
@media (max-width: 560px) {
  .biz-grid, .prod-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 34px; }
  .form { grid-template-columns: 1fr; }
  .split .txt ul.features { grid-template-columns: 1fr; }
  .brand-strip { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: 1fr; }
}

/* ===== Language switch ===== */
.nav-cta .lang-switch {
  font-size: 13px; color: var(--muted); letter-spacing: .1em; text-decoration: none;
  border: 1px solid var(--line); padding: 5px 11px; border-radius: 999px;
  transition: all .25s; white-space: nowrap;
}
.nav-cta .lang-switch:hover { color: var(--brown-700); border-color: var(--gold); }

/* ===== RTL support (Arabic) ===== */
html[dir="rtl"] body,
html[dir="rtl"] input,
html[dir="rtl"] select,
html[dir="rtl"] textarea,
html[dir="rtl"] button {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Arabic", "Helvetica Neue", Arial, sans-serif;
}
html[dir="rtl"] body,
html[dir="rtl"] .container,
html[dir="rtl"] .txt,
html[dir="rtl"] .sec-head,
html[dir="rtl"] .page-hero .container,
html[dir="rtl"] .c-info,
html[dir="rtl"] .f-contact { text-align: right; }
html[dir="rtl"] .split .media .tag { left: auto; right: 18px; }
html[dir="rtl"] .btn-arrow::after,
html[dir="rtl"] .biz-card .b-more::after,
html[dir="rtl"] .news-card .n-more::after { content: "←"; }
html[dir="rtl"] .btn-arrow:hover::after { transform: translateX(-5px); }
html[dir="rtl"] .biz-card:hover .b-more::after { transform: translateX(-5px); }
html[dir="rtl"] .tl-item:nth-child(odd) { left: auto; right: 0; text-align: left; }
html[dir="rtl"] .tl-item:nth-child(even) { left: auto; right: 50%; text-align: right; }
html[dir="rtl"] .tl-item:nth-child(odd)::before { right: auto; left: -8px; }
html[dir="rtl"] .tl-item:nth-child(even)::before { left: auto; right: -7px; }
html[dir="rtl"] .hm b,
html[dir="rtl"] .stat b,
html[dir="rtl"] .tl-year,
html[dir="rtl"] .p-no,
html[dir="rtl"] .n-date { direction: ltr; unicode-bidi: isolate; }