/* ==========================================================
   广安须臾商贸有限公司 · 官网样式
   ========================================================== */
:root{
  --brand:#0F3D6E;
  --brand-2:#1B6BB0;
  --brand-soft:#EAF2FA;
  --accent:#E8590C;
  --accent-soft:#FDEEE4;
  --ink:#111827;
  --text:#2B3648;
  --muted:#66738A;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --border:#E2E8F0;
  --radius:14px;
  --shadow:0 6px 24px rgba(15,61,110,.08);
  --shadow-lg:0 16px 44px rgba(15,61,110,.14);
  --maxw:1160px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);background:var(--bg);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{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px;gap:12px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;color:var(--brand);font-size:19px;letter-spacing:.5px;flex:0 0 auto;white-space:nowrap}
.logo-mark{
  width:40px;height:40px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;box-shadow:0 4px 12px rgba(15,61,110,.28);
}
.logo small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1.6px}
.nav-links{display:flex;align-items:center;gap:6px;flex:0 0 auto}
.nav-links a{
  padding:9px 12px;border-radius:9px;font-size:15px;font-weight:600;color:var(--text);
  transition:.2s;white-space:nowrap;
}
.nav-links a:hover{background:var(--brand-soft);color:var(--brand)}
.nav-links a.active{background:var(--brand);color:#fff}
.nav-cta{
  display:inline-flex;align-items:center;gap:7px;background:var(--accent);color:#fff;
  padding:10px 18px;border-radius:10px;font-weight:700;font-size:15px;
  box-shadow:0 6px 16px rgba(232,89,12,.28);transition:.2s;white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 9px 22px rgba(232,89,12,.36)}
/* 顶部「在线咨询」主按钮：全站主入口 */
.nav-chat{
  display:inline-flex;align-items:center;gap:7px;
  background:linear-gradient(135deg,#0BC46A,#06A34F);color:#fff;
  padding:10px 20px;border-radius:10px;font-weight:800;font-size:16px;
  box-shadow:0 8px 20px rgba(7,193,96,.34);transition:.2s;white-space:nowrap;
}
.nav-chat:hover{transform:translateY(-1px);box-shadow:0 11px 26px rgba(7,193,96,.46)}
.nav-chat .nav-chat-ico{font-size:18px;line-height:1}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--border);background:#fff;
  border-radius:10px;cursor:pointer;font-size:22px;color:var(--brand);line-height:1;
}

/* ---------- 通用区块 ---------- */
.section{padding:72px 0}
.section.alt{background:#fff}
.section-head{text-align:center;max-width:760px;margin:0 auto 46px}
.section-head .eyebrow{
  display:inline-block;font-size:13px;font-weight:800;letter-spacing:2px;
  color:var(--accent);text-transform:uppercase;margin-bottom:12px;
}
.section-head h1,.section-head h2{font-size:32px;line-height:1.35;color:var(--brand);font-weight:800}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:11px;font-weight:700;font-size:16px;
  cursor:pointer;border:1px solid transparent;transition:.2s;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 22px rgba(232,89,12,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(232,89,12,.4)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(120deg,#0A2E52 0%,#0F3D6E 45%,#14538F 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:url("../assets/products/43空白无油印台.jpg") center/cover no-repeat;
  opacity:.22;mix-blend-mode:luminosity;
}
/* 左右两栏：左营销文案，右「在线咨询」大卡片（首屏最大的一块） */
.hero-grid{
  position:relative;z-index:2;display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);
  grid-template-areas:"head chat" "lead chat" "act chat";
  column-gap:54px;
  padding:76px 20px 54px;
}
.hero-head{grid-area:head}
.hero-lead{grid-area:lead}
.hero-grid .hero-actions{grid-area:act}
.hero .tag{
  display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.28);padding:7px 16px;border-radius:999px;
  font-size:13.5px;font-weight:700;letter-spacing:1px;margin-bottom:22px;
}
.hero h1{font-size:46px;line-height:1.28;font-weight:800;letter-spacing:.5px}
.hero h1 em{font-style:normal;color:#FFB26B}
.hero p.lead{margin-top:20px;font-size:18px;color:rgba(255,255,255,.88);max-width:660px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}

/* ---------- 首屏在线咨询大卡片 ---------- */
.chat-hero{
  grid-area:chat;align-self:center;
  background:linear-gradient(180deg,#FFFFFF 0%,#F1FBF5 100%);
  border-radius:22px;padding:26px 26px 22px;color:var(--text);
  box-shadow:0 26px 60px rgba(2,18,38,.42),0 0 0 1px rgba(255,255,255,.55) inset;
}
.chat-hero-status{
  display:inline-flex;align-items:center;gap:7px;background:#E9F9EF;color:#0B8A47;
  border:1px solid #BCEBCB;padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:800;letter-spacing:.2px;
}
.chat-hero-status .dot{
  width:8px;height:8px;border-radius:50%;background:#07C160;
  animation:chatDot 1.8s infinite;
}
@keyframes chatDot{
  0%{box-shadow:0 0 0 0 rgba(7,193,96,.55)}
  70%{box-shadow:0 0 0 7px rgba(7,193,96,0)}
  100%{box-shadow:0 0 0 0 rgba(7,193,96,0)}
}
.chat-hero-avatar{
  width:58px;height:58px;border-radius:18px;margin:16px 0 12px;
  background:linear-gradient(135deg,#0BC46A,#04A34F);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:28px;
  box-shadow:0 10px 24px rgba(7,193,96,.35);
}
.chat-hero h2{font-size:25px;line-height:1.3;font-weight:800;color:var(--brand)}
.chat-hero p{margin-top:8px;font-size:14px;line-height:1.65;color:var(--muted)}
.chat-hero-btn{
  position:relative;width:100%;margin-top:18px;padding:15px 18px;
  display:flex;align-items:center;gap:12px;text-align:left;cursor:pointer;
  background:linear-gradient(135deg,#0BC46A,#06A34F);color:#fff;border:none;
  border-radius:15px;font-family:inherit;
  box-shadow:0 14px 30px rgba(7,193,96,.4);transition:.2s;
}
.chat-hero-btn:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(7,193,96,.52)}
.chat-hero-btn .ci{font-size:26px;line-height:1}
.chat-hero-btn .ct{flex:1;display:flex;flex-direction:column;font-size:21px;font-weight:800;line-height:1.25}
.chat-hero-btn .ct small{font-size:12.5px;font-weight:600;opacity:.92;margin-top:2px}
.chat-hero-btn .ar{font-size:30px;font-weight:400;line-height:1;opacity:.9}
.chat-hero-btn::after{
  content:"";position:absolute;inset:-1px;border-radius:16px;pointer-events:none;
  border:2px solid rgba(7,193,96,.55);animation:chatRing 2.4s ease-out infinite;
}
@keyframes chatRing{
  0%{transform:scale(1);opacity:.85}
  70%{transform:scale(1.05);opacity:0}
  100%{transform:scale(1.05);opacity:0}
}
.chat-hero-foot{margin-top:14px;font-size:12.5px;line-height:1.6;color:#7A8699;text-align:center}
.chat-hero-foot a{color:var(--brand-2);font-weight:800}
.hero-stats{
  position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-top:1px solid rgba(255,255,255,.18);
}
.hero-stats .st{padding:26px 10px;text-align:center;border-right:1px solid rgba(255,255,255,.14)}
.hero-stats .st:last-child{border-right:none}
.hero-stats b{display:block;font-size:30px;font-weight:800;color:#FFB26B}
.hero-stats span{font-size:14px;color:rgba(255,255,255,.82)}

/* ---------- 业务卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:22px}
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:30px 26px;box-shadow:var(--shadow);transition:.25s;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#cfe0f2}
.card .ico{
  width:54px;height:54px;border-radius:14px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px;
}
.card h3{font-size:19px;color:var(--brand);font-weight:800;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}

/* ---------- 产品分类 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(320px,100%),1fr));gap:26px}
.cat{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.25s;
}
.cat:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.cat-media{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--brand-soft)}
.cat-media img{width:100%;height:100%;object-fit:contain;transition:.5s;background:#fff}
.cat:hover .cat-media img{transform:scale(1.06)}
.cat-body{padding:24px 24px 26px;flex:1;display:flex;flex-direction:column}
.cat-body h3{font-size:20px;color:var(--brand);font-weight:800;margin-bottom:6px}
.cat-body .sub{font-size:13px;color:var(--accent);font-weight:700;letter-spacing:1px;margin-bottom:14px}
.cat-body ul{margin-top:4px}
.cat-body li{
  position:relative;padding-left:20px;font-size:14.5px;color:var(--text);margin-bottom:9px;
}
.cat-body li::before{
  content:"";position:absolute;left:2px;top:10px;width:7px;height:7px;border-radius:2px;
  background:var(--brand-2);
}
.cat-body li b{color:var(--brand)}
.cat-body li span{display:block;color:var(--muted);font-size:13.5px;line-height:1.55}
.cat-badge{
  position:absolute;top:14px;left:14px;background:var(--accent);color:#fff;
  font-size:12.5px;font-weight:700;padding:5px 12px;border-radius:999px;
  box-shadow:0 4px 12px rgba(0,0,0,.18);
}

/* ---------- 优势 ---------- */
.adv{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
.adv-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow)}
.adv-item .n{font-size:15px;font-weight:800;color:var(--accent);letter-spacing:1px}
.adv-item h4{font-size:18px;color:var(--brand);font-weight:800;margin:10px 0 8px}
.adv-item p{color:var(--muted);font-size:14.5px}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:14px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--border)}
th{background:var(--brand-soft);color:var(--brand);font-weight:800;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#FAFCFF}
td strong{color:var(--brand)}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
.about-grid h1,.about-grid h2{font-size:30px;color:var(--brand);font-weight:800;line-height:1.4;margin-bottom:18px}
.about-grid p{color:var(--muted);margin-bottom:14px}
.about-media img{border-radius:var(--radius);box-shadow:var(--shadow-lg);aspect-ratio:4/3;object-fit:contain;width:100%;background:#fff}
.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px}
.fact{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px 18px}
.fact b{display:block;color:var(--brand);font-size:16px}
.fact span{font-size:13px;color:var(--muted)}

/* ---------- 联系 ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.contact-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.contact-card h3{font-size:20px;color:var(--brand);font-weight:800;margin-bottom:20px}
.contact-line{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px dashed var(--border)}
.contact-line:last-child{border-bottom:none}
.contact-line .ci{
  width:42px;height:42px;flex:0 0 auto;border-radius:11px;background:var(--brand-soft);
  color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:19px;
}
.contact-line .ct b{display:block;font-size:15px;color:var(--ink)}
.contact-line .ct span{color:var(--muted);font-size:14.5px;word-break:break-all}
.contact-line .ct a{color:var(--brand-2);font-weight:700}

.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:14px;font-weight:700;color:var(--ink);margin-bottom:7px}
.form-row input,.form-row textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;
  font-size:15px;font-family:inherit;color:var(--text);background:#fff;transition:.2s;
}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:var(--brand-2);box-shadow:0 0 0 3px var(--brand-soft)}
.form-row textarea{resize:vertical;min-height:110px}
.form-note{font-size:13px;color:var(--muted);margin-top:12px}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:linear-gradient(120deg,#0F3D6E,#1B6BB0);color:#fff;border-radius:18px;
  padding:46px 40px;display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between;
  box-shadow:var(--shadow-lg);
}
.cta-band h3{font-size:26px;font-weight:800}
.cta-band p{color:rgba(255,255,255,.85);margin-top:6px}
.cta-band-txt{max-width:540px}
.cta-band-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cta-chat{
  background:linear-gradient(135deg,#0BC46A,#06A34F);color:#fff;border:none;
  font-size:19px;padding:15px 30px;box-shadow:0 10px 26px rgba(7,193,96,.4);
}
.cta-chat:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(7,193,96,.52)}

/* ---------- 面包屑 ---------- */
.crumb{background:#fff;border-bottom:1px solid var(--border);padding:16px 0;font-size:14px;color:var(--muted)}
.crumb a{color:var(--brand-2);font-weight:600}
.crumb span{margin:0 8px;opacity:.5}

/* ---------- 页脚 ---------- */
.site-footer{background:#0A2540;color:rgba(255,255,255,.72);padding:56px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
.site-footer h4{color:#fff;font-size:16px;font-weight:800;margin-bottom:16px}
.site-footer a{color:rgba(255,255,255,.72);font-size:14.5px;display:block;margin-bottom:10px;transition:.2s}
.site-footer a:hover{color:#FFB26B}
.site-footer p{font-size:14.5px;margin-bottom:10px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;color:#fff;font-weight:800;font-size:18px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);margin-top:38px;padding-top:20px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13.5px;
}

/* ---------- 商品网格（淘宝商品实拍图） ---------- */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:16px;margin-top:26px}
.p-item{background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);transition:.25s}
.p-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.p-item img{width:100%;aspect-ratio:1/1;object-fit:contain;background:#fff;display:block}
.p-item .p-name{padding:11px 12px;font-size:14px;font-weight:700;color:var(--brand);text-align:center;line-height:1.45;border-top:1px solid var(--border)}

/* ---------- 微信（大） / 电话（小） ---------- */
.wx-copy{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;
  background:#07C160;color:#fff;padding:13px 24px;border-radius:11px;
  font-size:19px;font-weight:800;border:1px solid transparent;
  box-shadow:0 8px 22px rgba(7,193,96,.3);transition:.2s;white-space:nowrap;
}
.wx-copy:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(7,193,96,.42)}
.wx-copy .wx-icon{font-size:22px;line-height:1}
.wx-copy .wx-empty{font-size:15px;font-weight:600;opacity:.85}
.tel-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  background:#fff;color:var(--brand);border:1px solid var(--border);
  padding:9px 16px;border-radius:10px;font-size:13.5px;font-weight:600;transition:.2s;white-space:nowrap;
}
.tel-btn:hover{border-color:var(--brand-2);color:var(--brand-2)}
.wx-big{font-size:20px;font-weight:800;color:#07C160;cursor:pointer}
.wx-item{
  display:inline-block;background:rgba(7,193,96,.12);color:#07C160;
  border:1px dashed #7BD9A4;border-radius:8px;padding:2px 10px;margin:2px 0;
  font-weight:800;cursor:pointer;transition:.15s;vertical-align:baseline;
}
.wx-item:hover{background:#07C160;color:#fff;border-style:solid}
/* 绿色按钮/深色导航背景内的微信号：白底深绿字，保证清晰可辨 */
.wx-copy .wx-item,.nav-wx .wx-item{background:#fff;color:#07C160;border:1px solid #fff;box-shadow:0 1px 4px rgba(0,0,0,.15)}
.wx-copy .wx-item:hover,.nav-wx .wx-item:hover{background:#E6F9EC;color:#047A45}
.wx-sep{color:rgba(7,193,96,.55);font-weight:700;margin:0 2px}
.wx-copy .wx-sep{color:#fff}
.tel-small{font-size:14px;font-weight:600;color:var(--brand-2)}
.nav-wx{
  display:inline-flex;align-items:center;gap:6px;background:var(--brand-soft);color:#07C160;
  padding:9px 14px;border-radius:10px;font-weight:800;font-size:16px;cursor:pointer;
  border:1px solid #BDEBCB;transition:.2s;white-space:nowrap;
}
.nav-wx:hover{background:#E6F9EC}
.site-footer .wx-big{color:#3DDC84;display:inline-block;line-height:1.5}
.site-footer .wx-big:hover{color:#6FE7A3}
.site-footer .tel-small{color:rgba(255,255,255,.85);font-weight:700}
.wx-tip{margin:8px 0 0;font-size:12.5px;color:#8A94A6;line-height:1.6}

/* ---------- 电话（3 个随机显示，小字）与投诉电话 ---------- */
.tel-item{
  color:var(--brand-2);font-weight:700;text-decoration:none;white-space:nowrap;
}
a.tel-item:hover{color:var(--accent);text-decoration:underline}
.tel-sep{color:var(--muted);margin:0 4px;font-weight:400}
.complaint-item{color:#8A94A6;font-weight:600;text-decoration:none;white-space:nowrap}
a.complaint-item:hover{color:var(--accent);text-decoration:underline}
.hero .tel-item{color:#FFD9A8;font-weight:800;font-size:15px}
.hero .tel-sep{color:rgba(255,255,255,.55)}
.hero .complaint-item{color:rgba(255,255,255,.75)}
.site-footer .tel-item{color:#F5B86E;font-weight:700}
.site-footer .tel-sep{color:rgba(255,255,255,.4)}
.site-footer .complaint-item{color:rgba(255,255,255,.6)}

/* ---------- 商品卡：添加微信 / 购买商品 ---------- */
.p-buy{
  display:flex;gap:8px;padding:0 10px 12px;border-top:1px solid var(--border);
  padding-top:10px;background:#fff;border-radius:0 0 12px 12px;
}
.buy-wx{
  flex:1;display:inline-flex;align-items:center;justify-content:center;gap:4px;
  background:#fff;color:#07C160;border:1.5px solid #07C160;border-radius:9px;
  padding:7px 4px;font-size:13.5px;font-weight:800;cursor:pointer;transition:.15s;
}
.buy-wx:hover{background:#07C160;color:#fff}
.buy-tel{
  flex:1;display:inline-flex;align-items:center;justify-content:center;gap:4px;
  background:var(--brand);color:#fff;border-radius:9px;padding:7px 6px;
  font-size:13px;font-weight:700;cursor:pointer;transition:.15s;white-space:normal;
  line-height:1.35;word-break:break-all;text-align:center;min-height:34px;
}
.buy-tel:hover{background:var(--brand-2)}

/* ---------- 留言板 ---------- */
.msg-board{
  background:linear-gradient(135deg,#F0F7FF 0%,#FFFFFF 100%);
  border:2px solid var(--brand-soft);border-radius:var(--radius);
  padding:36px 34px;margin-top:46px;box-shadow:var(--shadow);
}
.msg-board .msg-title{font-size:26px;color:var(--brand);font-weight:800;margin-bottom:6px}
.msg-board .msg-sub{color:var(--muted);font-size:14.5px;margin-bottom:22px}
.msg-board .msg-form{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.msg-board input,.msg-board textarea{
  width:100%;border:1px solid var(--border);border-radius:10px;padding:12px 14px;
  font-size:15px;font-family:inherit;background:#fff;color:var(--text);
}
.msg-board input:focus,.msg-board textarea:focus{outline:none;border-color:var(--brand-2)}
.msg-board textarea{grid-column:1/-1;min-height:110px;resize:vertical}
.msg-board .msg-btn{
  grid-column:1/-1;background:var(--brand);color:#fff;border:none;border-radius:12px;
  padding:14px;font-size:17px;font-weight:800;cursor:pointer;transition:.2s;
}
.msg-board .msg-btn:hover{background:var(--brand-2)}
.msg-board .msg-note{margin-top:12px;font-size:14px;font-weight:600;min-height:20px}
@media (max-width:640px){
  .msg-board .msg-form{grid-template-columns:1fr}
  .msg-board{padding:26px 20px}
}

/* ---------- 复制提示 ---------- */
.copy-toast{
  position:fixed;bottom:90px;left:50%;transform:translateX(-50%);
  background:rgba(17,24,39,.94);color:#fff;padding:13px 26px;border-radius:12px;
  font-size:15px;font-weight:600;z-index:9999;box-shadow:0 12px 32px rgba(0,0,0,.35);
  opacity:0;pointer-events:none;transition:opacity .3s;max-width:90vw;text-align:center;
}
.copy-toast.show{opacity:1}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .nav-wx{display:none}
}
@media (max-width:980px){
  .nav-cta{display:none}
}
@media (max-width:860px){
  /* 导航收进 ☰，只留「在线咨询」这一颗大按钮在右上角 */
  .nav-toggle{display:block;order:3}
  .nav-chat{order:2;margin-left:auto;margin-right:4px;padding:9px 12px;font-size:14px}
  .logo{font-size:16px;gap:8px}
  .logo-mark{width:34px;height:34px;border-radius:9px;font-size:17px}
  .logo small{font-size:9.5px;letter-spacing:1.1px}
  .nav-links{
    position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;gap:2px;padding:12px 16px 18px;border-bottom:1px solid var(--border);
    box-shadow:0 14px 26px rgba(15,61,110,.12);display:none;flex:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 14px}
  .nav-cta{display:none}
}
@media (max-width:920px){
  .about-grid,.contact-wrap{grid-template-columns:1fr;gap:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .hero-grid{
    grid-template-columns:1fr;
    grid-template-areas:"head" "chat" "lead" "act";
    row-gap:0;padding:48px 20px 42px;
  }
  .chat-hero{margin-top:26px;max-width:620px}
  .hero h1{font-size:34px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .hero-stats .st:nth-child(2){border-right:none}
  .hero-stats .st:nth-child(1),.hero-stats .st:nth-child(2){border-bottom:1px solid rgba(255,255,255,.14)}
  .section{padding:56px 0}
  .section-head h2{font-size:26px}
}
@media (max-width:760px){
  .hero-grid{padding:32px 20px 28px}
  .hero .tag{font-size:12.5px;padding:6px 13px;margin-bottom:16px}
  .hero h1{font-size:28px}
  .hero p.lead{font-size:16px;margin-top:16px}
  .hero-actions{margin-top:22px}
  .hero-actions .btn{flex:1 1 100%}
  /* 联系页：微信号大块在窄屏会撑出屏幕，允许折行 */
  .contact-wrap,.contact-card,.contact-line .ct{min-width:0}
  .contact-line .wx-big{width:100%;flex-wrap:wrap;white-space:normal;font-size:15px;padding:10px 14px;gap:4px}
  .contact-line .wx-big .wx-item{font-size:14px}
  .contact-card .btn{max-width:100%;white-space:normal;word-break:break-all}
  .chat-hero{padding:20px;border-radius:18px;margin-top:22px}
  .chat-hero-avatar{width:50px;height:50px;border-radius:15px;font-size:24px;margin:13px 0 10px}
  .chat-hero h2{font-size:21px}
  .chat-hero p{font-size:13.5px}
  .chat-hero-btn{padding:13px 14px;gap:10px;margin-top:16px}
  .chat-hero-btn .ct{font-size:19px}
  .chat-hero-btn .ct small{font-size:12px}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:30px 22px}
  .cta-band h3{font-size:22px}
  .cta-band-txt{max-width:none}
  .cta-band-actions{width:100%;flex-direction:column;align-items:stretch;gap:10px}
  .cta-band-actions .btn{width:100%;max-width:100%;white-space:normal;word-break:break-all}
  .cta-band-actions .wx-copy{display:none}
  .section-head h2{font-size:23px}
}
@media (max-width:380px){
  /* 超小屏（320~380）：顶部只保留 logo + 在线咨询 + ☰，不能撑出横向滚动 */
  .nav{gap:8px}
  .logo{font-size:14px;gap:6px;letter-spacing:0}
  .logo-mark{width:30px;height:30px;border-radius:8px;font-size:15px}
  .logo small{display:none}
  .nav-chat{padding:8px 10px;font-size:13px;gap:5px}
  .nav-chat .nav-chat-ico{font-size:16px}
  .nav-toggle{width:40px;height:40px;font-size:20px}
}