/* SYNHEJU 前台样式：响应式 + RTL */
:root {
  --primary: #0F4C81;
  --primary-dark: #0A3559;
  --accent: #F59E0B;
  --text: #1F2937;
  --muted: #6B7280;
  --bg: #F7F9FC;
  --card: #FFFFFF;
  --border: #E5E7EB;
  --radius: 10px;
  --shadow: 0 4px 16px rgba(15, 76, 129, .08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans", Arial, sans-serif;
  color: var(--text); background: var(--bg); line-height: 1.6;
}
[dir="rtl"] body { font-family: "Segoe UI", Tahoma, "Noto Sans Arabic", Arial, sans-serif; }
a { color: var(--primary); text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.btn {
  display: inline-block; padding: 12px 28px; border-radius: 6px; font-weight: 600;
  background: var(--accent); color: #1F2937; border: none; cursor: pointer;
  transition: transform .15s, box-shadow .15s; font-size: 15px;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(245, 158, 11, .35); }
.btn-outline { background: transparent; border: 2px solid #fff; color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.12); box-shadow: none; }
.section { padding: 56px 0; }
.section-title { font-size: 28px; color: var(--primary-dark); text-align: center; margin-bottom: 8px; }
.section-sub { text-align: center; color: var(--muted); margin-bottom: 36px; }

/* 顶栏 */
.topbar { background: var(--primary-dark); color: #CBD5E1; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; height: 36px; gap: 12px; }
.topbar a { color: #CBD5E1; margin-inline-start: 14px; }
.topbar a:hover { color: #fff; }
.topbar .topbar-contact { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }

/* 主导航 */
.navbar { background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,.06); position: sticky; top: 0; z-index: 100; }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--primary); }
.logo img { width: 36px; height: 36px; }
.logo small { display: block; font-size: 11px; color: var(--muted); font-weight: 400; line-height: 1.1; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a { display: block; padding: 8px 14px; color: var(--text); font-weight: 500; border-radius: 6px; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: #EFF6FF; }
.nav-cta { margin-inline-start: 8px; padding: 8px 18px !important; background: var(--accent); color: #1F2937 !important; font-weight: 600; border-radius: 6px; }
.lang-wrap { position: relative; margin-inline-start: 8px; }
.lang-btn { background: none; border: 1px solid var(--border); border-radius: 6px; padding: 7px 12px; cursor: pointer; font-size: 14px; color: var(--text); }
.lang-menu {
  display: none; position: absolute; inset-inline-end: 0; top: 110%; background: #fff; border: 1px solid var(--border);
  border-radius: 8px; box-shadow: var(--shadow); min-width: 160px; max-height: 320px; overflow: auto; z-index: 200;
}
.lang-menu.open { display: block; }
.lang-menu a { display: block; padding: 9px 14px; color: var(--text); font-size: 14px; }
.lang-menu a:hover { background: #EFF6FF; }
.lang-menu a.current { color: var(--primary); font-weight: 600; }
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; transition: .2s; }

/* 轮播 */
.hero { position: relative; overflow: hidden; background: var(--primary-dark); }
.hero-slide { position: relative; display: none; min-height: 420px; align-items: center; }
.hero-slide.active { display: flex; }
.hero-slide .hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .45; }
.hero-slide .container { position: relative; z-index: 2; padding-top: 64px; padding-bottom: 64px; }
.hero-slide h1 { color: #fff; font-size: 38px; line-height: 1.25; max-width: 640px; margin-bottom: 14px; text-shadow: 0 2px 12px rgba(0,0,0,.35); }
.hero-slide p { color: #E2E8F0; font-size: 18px; max-width: 560px; margin-bottom: 26px; text-shadow: 0 1px 8px rgba(0,0,0,.35); }
.hero-dots { position: absolute; bottom: 18px; inset-inline-start: 50%; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; }
[dir="rtl"] .hero-dots { transform: translateX(50%); }
.hero-dots button { width: 10px; height: 10px; border-radius: 50%; border: none; background: rgba(255,255,255,.45); cursor: pointer; }
.hero-dots button.active { background: var(--accent); }

/* 统计条 */
.stats { background: var(--primary); color: #fff; }
.stats .container { display: grid; grid-template-columns: repeat(3, 1fr); text-align: center; padding-top: 28px; padding-bottom: 28px; gap: 12px; }
.stats .num { font-size: 34px; font-weight: 800; color: var(--accent); }
.stats .label { font-size: 14px; opacity: .9; }

/* 卡片网格 */
.grid { display: grid; gap: 24px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: transform .2s; display: flex; flex-direction: column; }
.card:hover { transform: translateY(-4px); }
.card .card-img { aspect-ratio: 4/3; object-fit: cover; width: 100%; background: #E2E8F0; }
.card .card-body { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.card h3 { font-size: 17px; color: var(--primary-dark); margin-bottom: 8px; }
.card .card-text { color: var(--muted); font-size: 14px; flex: 1; }
.card .card-link { margin-top: 12px; font-weight: 600; font-size: 14px; }

/* 优势 */
.adv-card { text-align: center; padding: 30px 20px; }
.adv-icon { width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 14px; background: #EFF6FF; display: flex; align-items: center; justify-content: center; }
.adv-icon svg { width: 28px; height: 28px; stroke: var(--primary); }

/* 工厂区 */
.factory { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.factory img { border-radius: var(--radius); box-shadow: var(--shadow); }
.factory h2 { color: var(--primary-dark); font-size: 26px; margin-bottom: 12px; }
.factory p { color: var(--muted); }

/* CTA */
.cta { background: linear-gradient(120deg, var(--primary-dark), var(--primary)); color: #fff; text-align: center; }
.cta h2 { font-size: 28px; margin-bottom: 10px; }
.cta p { color: #CBD5E1; margin-bottom: 24px; }

/* 页脚 */
.footer { background: #0B2440; color: #94A3B8; padding: 48px 0 0; font-size: 14px; }
.footer .grid { grid-template-columns: 2fr 1fr 1fr; gap: 36px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 8px; }
.footer a { color: #94A3B8; }
.footer a:hover { color: #fff; }
.footer .brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 18px; margin-bottom: 12px; }
.footer .copyright { border-top: 1px solid rgba(255,255,255,.1); margin-top: 36px; padding: 18px 0; text-align: center; font-size: 13px; }

/* 页面标题 */
.page-head { background: linear-gradient(120deg, var(--primary-dark), var(--primary)); color: #fff; padding: 44px 0; }
.page-head h1 { font-size: 30px; }
.page-head .crumb { font-size: 13px; opacity: .8; margin-top: 6px; }
.page-head .crumb a { color: #E2E8F0; }

/* 产品列表 */
.cat-filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.cat-filter a { padding: 8px 18px; border-radius: 999px; border: 1px solid var(--border); background: #fff; color: var(--text); font-size: 14px; }
.cat-filter a.active, .cat-filter a:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 产品详情 */
.pd { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.pd-gallery .main-img { border-radius: var(--radius); box-shadow: var(--shadow); aspect-ratio: 4/3; object-fit: cover; width: 100%; background: #E2E8F0; }
.pd-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.pd-thumbs img { width: 80px; height: 60px; object-fit: cover; border-radius: 6px; cursor: pointer; border: 2px solid transparent; }
.pd-thumbs img.active { border-color: var(--accent); }
.pd-info h1 { font-size: 26px; color: var(--primary-dark); margin-bottom: 12px; }
.pd-info .pd-cat { display: inline-block; background: #EFF6FF; color: var(--primary); font-size: 13px; padding: 4px 12px; border-radius: 999px; margin-bottom: 14px; }
.pd-summary { color: var(--muted); margin-bottom: 22px; }
.pd-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.spec-table th, .spec-table td { padding: 12px 16px; text-align: start; border-bottom: 1px solid var(--border); font-size: 14px; }
.spec-table th { background: #F1F5F9; width: 40%; color: var(--primary-dark); }
.prose { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; white-space: pre-line; color: var(--text); }

/* 表单 */
.form-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: var(--primary-dark); }
.form-row input, .form-row textarea, .form-row select {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 15px; font-family: inherit; background: #fff;
}
.form-row input:focus, .form-row textarea:focus { outline: 2px solid rgba(15,76,129,.25); border-color: var(--primary); }
.form-msg { margin-top: 14px; padding: 12px 16px; border-radius: 8px; font-size: 14px; display: none; }
.form-msg.ok { display: block; background: #ECFDF5; color: #047857; border: 1px solid #A7F3D0; }
.form-msg.err { display: block; background: #FEF2F2; color: #B91C1C; border: 1px solid #FECACA; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 32px; align-items: start; }
.contact-item { display: flex; gap: 12px; margin-bottom: 18px; align-items: flex-start; }
.contact-item svg { width: 22px; height: 22px; stroke: var(--primary); flex-shrink: 0; margin-top: 3px; }
.contact-item b { display: block; color: var(--primary-dark); font-size: 14px; }

/* 新闻 */
.news-list .card { flex-direction: row; }
.news-list .card .card-img { width: 260px; aspect-ratio: auto; flex-shrink: 0; }
.news-date { font-size: 13px; color: var(--muted); margin-bottom: 6px; }

/* 聊天浮窗 */
.chat-fab {
  position: fixed; bottom: 22px; inset-inline-end: 22px; z-index: 900;
  width: 58px; height: 58px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--primary); box-shadow: 0 6px 20px rgba(15,76,129,.4);
  display: flex; align-items: center; justify-content: center; transition: transform .15s;
}
.chat-fab:hover { transform: scale(1.06); }
.chat-fab svg { width: 28px; height: 28px; stroke: #fff; }
.chat-panel {
  position: fixed; bottom: 92px; inset-inline-end: 22px; z-index: 901;
  width: 360px; max-width: calc(100vw - 32px); height: 480px; max-height: calc(100vh - 120px);
  background: #fff; border-radius: 14px; box-shadow: 0 12px 40px rgba(0,0,0,.18);
  display: none; flex-direction: column; overflow: hidden;
}
.chat-panel.open { display: flex; }
.chat-head { background: var(--primary); color: #fff; padding: 14px 16px; display: flex; justify-content: space-between; align-items: center; }
.chat-head b { font-size: 15px; }
.chat-head small { display: block; font-size: 12px; opacity: .8; font-weight: 400; }
.chat-head button { background: none; border: none; color: #fff; font-size: 20px; cursor: pointer; line-height: 1; }
.chat-messages { flex: 1; overflow-y: auto; padding: 14px; background: #F1F5F9; }
.chat-msg { max-width: 80%; margin-bottom: 10px; padding: 9px 13px; border-radius: 12px; font-size: 14px; word-break: break-word; white-space: pre-line; }
.chat-msg.visitor { margin-inline-start: auto; background: var(--primary); color: #fff; border-end-end-radius: 4px; }
.chat-msg.admin { margin-inline-end: auto; background: #fff; border: 1px solid var(--border); border-end-start-radius: 4px; }
.chat-msg .tr { display: block; margin-top: 5px; padding-top: 5px; border-top: 1px dashed rgba(0,0,0,.12); font-size: 12px; opacity: .75; }
.chat-msg.visitor .tr { border-top-color: rgba(255,255,255,.3); }
.chat-time { font-size: 11px; color: var(--muted); text-align: center; margin: 8px 0; }
.chat-input { display: flex; border-top: 1px solid var(--border); }
.chat-input input { flex: 1; border: none; padding: 13px 14px; font-size: 14px; outline: none; }
.chat-input button { border: none; background: var(--primary); color: #fff; padding: 0 20px; cursor: pointer; font-size: 14px; }
.chat-start { padding: 22px 18px; }
.chat-start input { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 12px; font-size: 14px; }
.chat-start .btn { width: 100%; }
.chat-wa { text-align: center; padding: 8px; font-size: 12px; border-top: 1px solid var(--border); background: #FAFAFA; }
.chat-wa a { color: #25D366; font-weight: 600; }

/* 微信二维码：点击弹窗 */
.wechat-qr { position: relative; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.wechat-qr .qr-pop {
  position: absolute; bottom: 130%; left: 50%; transform: translateX(-50%);
  background: #fff; padding: 10px; border: 1px solid var(--border); border-radius: 10px;
  box-shadow: 0 6px 20px rgba(0,0,0,.14); z-index: 9999; text-align: center;
  width: 220px; display: none;
}
/* 顶栏：弹窗向下 */
.wechat-qr--down .qr-pop { bottom: auto; top: 130%; }
.wechat-qr .qr-pop img { width: 200px; height: 200px; object-fit: contain; display: block; border-radius: 6px; }
.wechat-qr .qr-pop small { display: block; margin-top: 6px; color: var(--muted); font-size: 12px; }
.wechat-qr.open .qr-pop { display: block; }
.wechat-qr .qr-tip { color: var(--primary); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
/* 顶栏深色背景：放大并使用白色文字 */
.topbar .wechat-qr { font-size: 13px; }
.topbar .wechat-qr .qr-tip { color: #fff; text-decoration-color: rgba(255,255,255,.6); }
/* 聊天面板内：弹窗 fixed 居中，避开 overflow 裁剪 */
.chat-panel .wechat-qr { display: inline-flex; }
.chat-panel .qr-pop {
  position: fixed; top: 50%; left: 50%; bottom: auto; transform: translate(-50%, -50%);
  width: 240px; z-index: 9999;
}
.chat-panel .qr-pop img { width: 220px; height: 220px; }
.chat-wa { text-align: center; padding: 8px; font-size: 12px; border-top: 1px solid var(--border); background: #FAFAFA; }

/* 响应式 */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .factory, .pd, .contact-grid { grid-template-columns: 1fr; }
  .news-list .card { flex-direction: column; }
  .news-list .card .card-img { width: 100%; aspect-ratio: 16/9; }
}
@media (max-width: 720px) {
  .hamburger { display: block; }
  .nav-links {
    display: none; position: absolute; top: 64px; inset-inline-start: 0; inset-inline-end: 0;
    background: #fff; flex-direction: column; align-items: stretch; padding: 10px 16px 16px;
    box-shadow: 0 8px 16px rgba(0,0,0,.08); gap: 2px;
  }
  .nav-links.open { display: flex; }
  .nav-cta { margin: 8px 0 0; text-align: center; }
  .lang-wrap { margin: 8px 0 0; }
  .lang-btn { width: 100%; }
  .hero-slide { min-height: 340px; }
  .hero-slide h1 { font-size: 26px; }
  .hero-slide p { font-size: 15px; }
  .section { padding: 40px 0; }
  .section-title { font-size: 23px; }
  .stats .num { font-size: 26px; }
  .topbar .topbar-contact span.hide-m { display: none; }
  .footer .grid { grid-template-columns: 1fr; gap: 24px; }
  .chat-panel { inset-inline-end: 16px; bottom: 88px; height: 65vh; }
}
@media (max-width: 480px) {
  .grid-4, .grid-3 { grid-template-columns: 1fr; }
  .stats .container { grid-template-columns: repeat(3, 1fr); gap: 6px; }
}