/* ============================================================
   瑞美智能企业官网样式  style.css
   主色：工业蓝 #12467f  强调：科技青 #0e9f8a  警示红：#d9382e
   ============================================================ */
:root {
  --c-primary: #12467f;
  --c-primary-dark: #0d3560;
  --c-primary-light: #eaf2fb;
  --c-accent: #0e9f8a;
  --c-accent-light: #e6f7f4;
  --c-text: #1d2733;
  --c-text-2: #55636f;
  --c-text-3: #8a97a3;
  --c-line: #e4e9ef;
  --c-bg: #f5f7fa;
  --c-white: #fff;
  --c-danger: #d9382e;
  --c-price: #e0362c;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(16, 42, 80, .08);
  --shadow-lg: 0 8px 28px rgba(16, 42, 80, .14);
  --max: 1180px;
  font-size: 16px;
}
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
  color: var(--c-text); background: var(--c-white);
  line-height: 1.65; word-break: break-word;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 16px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ============ 顶部通栏 ============ */
.topbar { background: var(--c-primary-dark); color: #cfe0f2; font-size: 13px; }
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; min-height: 34px; gap: 12px; flex-wrap: wrap; }
.topbar a { color: #fff; }
@media (max-width: 768px) { .topbar .topbar-right { display: none; } }

/* ============ 导航 ============ */
.nav { position: sticky; top: 0; z-index: 100; background: #fff; box-shadow: 0 1px 0 var(--c-line), 0 2px 14px rgba(16,42,80,.06); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { width: 40px; height: 40px; flex: 0 0 40px; }
.logo-text { line-height: 1.15; }
.logo-text b { font-size: 19px; color: var(--c-primary); letter-spacing: 1px; display: block; }
.logo-text span { font-size: 11px; color: var(--c-text-3); letter-spacing: 2.5px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 8px 15px; border-radius: 8px; font-size: 15.5px; color: var(--c-text-2); transition: .18s; white-space: nowrap; }
.nav-links a:hover { color: var(--c-primary); background: var(--c-primary-light); }
.nav-links a.active { color: var(--c-primary); font-weight: 600; background: var(--c-primary-light); }
.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-phone { font-size: 14px; color: var(--c-text-2); text-align: right; line-height: 1.2; }
.nav-phone b { display: block; font-size: 17px; color: var(--c-primary); }
.burger { display: none; width: 44px; height: 44px; border-radius: 8px; align-items: center; justify-content: center; }
.burger svg { width: 26px; height: 26px; stroke: var(--c-primary); }
.m-menu { display: none; border-top: 1px solid var(--c-line); background: #fff; }
.m-menu.open { display: block; }
.m-menu a { display: block; padding: 13px 22px; font-size: 16px; border-bottom: 1px solid var(--c-line); color: var(--c-text); }
.m-menu a.active { color: var(--c-primary); font-weight: 600; background: var(--c-primary-light); }
@media (max-width: 900px) {
  .nav-links, .nav-cta .nav-phone { display: none; }
  .burger { display: flex; }
}

/* ============ Hero 首屏 ============ */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(118deg, var(--c-primary-dark) 0%, #14497e 46%, #0d6e6d 100%);
  color: #fff;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(700px 340px at 88% 8%, rgba(14, 159, 138, .30), transparent 60%),
    radial-gradient(560px 300px at 4% 96%, rgba(255, 255, 255, .10), transparent 60%);
}
.hero-inner { position: relative; padding: 74px 0 84px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; }
.hero-tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.25); padding: 6px 14px; border-radius: 999px; font-size: 13.5px; letter-spacing: 1px; }
.hero h1 { font-size: 40px; line-height: 1.3; margin: 18px 0 14px; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: #67e8d4; }
.hero p.lead { font-size: 16.5px; color: #d7e4f2; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 28px; border-radius: 10px; font-size: 16px; font-weight: 600; transition: .18s; min-height: 48px; }
.btn-accent { background: var(--c-accent); color: #fff; box-shadow: 0 6px 18px rgba(14,159,138,.4); }
.btn-accent:hover { background: #0c8a77; transform: translateY(-2px); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.55); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-dark); }
.btn-line { border: 1.5px solid var(--c-primary); color: var(--c-primary); background: #fff; }
.btn-line:hover { background: var(--c-primary-light); }
.hero-stats { position: relative; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.hero-stats .stat { background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.18); backdrop-filter: blur(4px); border-radius: var(--radius); padding: 20px 18px; }
.hero-stats .stat b { display: block; font-size: 26px; color: #fff; }
.hero-stats .stat span { font-size: 13.5px; color: #b9cde2; }
.hero-img { margin-top: 26px; border-radius: var(--radius); overflow: hidden; border: 1px solid rgba(255,255,255,.2); box-shadow: var(--shadow-lg); }
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; padding: 46px 0 54px; }
  .hero h1 { font-size: 29px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ============ 通用 Section ============ */
.sec { padding: 64px 0; }
.sec.bg { background: var(--c-bg); }
.sec-head { text-align: center; margin-bottom: 38px; }
.sec-head .en { font-size: 12.5px; letter-spacing: 3px; color: var(--c-accent); font-weight: 700; text-transform: uppercase; }
.sec-head h2 { font-size: 30px; color: var(--c-text); margin: 6px 0 10px; letter-spacing: 1px; }
.sec-head p { color: var(--c-text-2); max-width: 640px; margin: 0 auto; font-size: 15px; }
.sec-head::after { content: ""; display: block; width: 46px; height: 3.5px; background: var(--c-accent); border-radius: 2px; margin: 16px auto 0; }

/* ============ 能力四卡 ============ */
.cap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cap-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 28px 22px; transition: .2s; }
.sec.bg .cap-card { box-shadow: var(--shadow); }
.cap-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: transparent; }
.cap-icon { width: 52px; height: 52px; border-radius: 12px; background: var(--c-primary-light); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.cap-icon svg { width: 27px; height: 27px; stroke: var(--c-primary); }
.cap-card h3 { font-size: 17.5px; margin-bottom: 8px; }
.cap-card p { font-size: 14px; color: var(--c-text-2); }
@media (max-width: 980px) { .cap-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cap-grid { grid-template-columns: 1fr; } }

/* ============ 产品网格 ============ */
.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.prod-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; transition: .2s; display: flex; flex-direction: column; position: relative; }
.prod-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.prod-thumb { position: relative; aspect-ratio: 1 / 1; background: #fff; overflow: hidden; }
.prod-thumb img { width: 100%; height: 100%; object-fit: cover; transition: .35s; }
.prod-card:hover .prod-thumb img { transform: scale(1.05); }
.prod-badge { position: absolute; top: 10px; left: 10px; background: var(--c-danger); color: #fff; font-size: 12px; padding: 3px 9px; border-radius: 6px; letter-spacing: 1px; }
.prod-info { padding: 15px 16px 17px; flex: 1; display: flex; flex-direction: column; }
.prod-info h3 { font-size: 15.5px; line-height: 1.45; min-height: 45px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.prod-tags { display: flex; gap: 6px; flex-wrap: wrap; margin: 9px 0 12px; }
.prod-tags span { font-size: 12px; color: var(--c-accent); background: var(--c-accent-light); border-radius: 5px; padding: 2.5px 8px; }
.prod-bottom { margin-top: auto; display: flex; justify-content: space-between; align-items: center; border-top: 1px dashed var(--c-line); padding-top: 11px; }
.prod-price { color: var(--c-price); font-weight: 700; font-size: 17px; }
.prod-price small { font-size: 12px; font-weight: 400; color: var(--c-text-3); margin-left: 4px; }
.prod-more { font-size: 13px; color: var(--c-text-3); }
.prod-card:hover .prod-more { color: var(--c-primary); }
.sec-more { text-align: center; margin-top: 34px; }
@media (max-width: 980px) { .prod-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .prod-grid { gap: 12px; } .prod-info h3 { font-size: 14.5px; } }

/* ============ 关于/简介 ============ */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.about-txt h2 { font-size: 27px; margin-bottom: 16px; }
.about-txt p { color: var(--c-text-2); font-size: 15px; margin-bottom: 13px; text-align: justify; }
.about-points { margin: 16px 0 22px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.about-points li { display: flex; align-items: center; gap: 8px; font-size: 14.5px; color: var(--c-text); }
.about-points svg { width: 19px; height: 19px; stroke: var(--c-accent); flex: 0 0 19px; }
.about-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.about-imgs img { border-radius: var(--radius); aspect-ratio: 4/3; object-fit: cover; width: 100%; box-shadow: var(--shadow); }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; } }

/* ============ 定制流程 ============ */
.flow-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; counter-reset: flow; }
.flow-step { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 24px 16px 20px; text-align: center; position: relative; transition: .2s; }
.sec.bg .flow-step { box-shadow: var(--shadow); }
.flow-step:hover { border-color: var(--c-accent); transform: translateY(-4px); }
.flow-num { width: 40px; height: 40px; margin: 0 auto 12px; border-radius: 50%; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); color: #fff; font-weight: 700; font-size: 17px; display: flex; align-items: center; justify-content: center; }
.flow-step h3 { font-size: 16px; margin-bottom: 6px; }
.flow-step p { font-size: 13px; color: var(--c-text-2); }
@media (max-width: 900px) { .flow-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .flow-grid { grid-template-columns: 1fr 1fr; gap: 10px; } }

/* ============ 工厂 ============ */
.factory-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center; }
.factory-grid img.main { border-radius: var(--radius); box-shadow: var(--shadow-lg); aspect-ratio: 16/10; object-fit: cover; width: 100%; }
.factory-points li { display: flex; gap: 12px; align-items: flex-start; padding: 13px 0; border-bottom: 1px dashed var(--c-line); font-size: 15.5px; }
.factory-points li:last-child { border-bottom: none; }
.factory-points svg { width: 22px; height: 22px; stroke: var(--c-accent); flex: 0 0 22px; margin-top: 2px; }
@media (max-width: 900px) { .factory-grid { grid-template-columns: 1fr; } }

/* ============ 联系 CTA ============ */
.cta-band { background: linear-gradient(118deg, var(--c-primary-dark), var(--c-primary)); border-radius: 16px; color: #fff; padding: 40px 44px; display: flex; justify-content: space-between; align-items: center; gap: 22px; flex-wrap: wrap; }
.cta-band h2 { font-size: 24px; margin-bottom: 6px; }
.cta-band p { color: #c9dbef; font-size: 14.5px; }
.cta-band .btn-accent { padding: 14px 34px; }

/* ============ 页脚 ============ */
.footer { background: #0c2237; color: #8ba3ba; margin-top: 70px; }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 34px; padding: 52px 0 40px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 15px; letter-spacing: 1px; }
.footer p, .footer li { font-size: 13.8px; line-height: 1.9; }
.footer a:hover { color: #fff; }
.footer-col li { margin-bottom: 2px; }
.footer-contact li { display: flex; gap: 9px; align-items: flex-start; }
.footer-contact svg { width: 17px; height: 17px; stroke: #4d90c4; flex: 0 0 17px; margin-top: 5px; }
.footer-beian { border-top: 1px solid #1a3a58; padding: 17px 0 22px; text-align: center; font-size: 13px; display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.footer-beian a { color: #8ba3ba; }
.footer-beian a:hover { color: #fff; }
.footer-beian img { display: inline-block; width: 15px; height: 15px; vertical-align: -2px; margin-right: 4px; }
@media (max-width: 900px) { .footer-main { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .footer-main { grid-template-columns: 1fr; gap: 26px; } }

/* ============ 页头横幅（内页） ============ */
.page-hero { background: linear-gradient(118deg, var(--c-primary-dark), #14497e 60%, #0d6e6d); color: #fff; padding: 40px 0; }
.page-hero h1 { font-size: 27px; letter-spacing: 1px; }
.page-hero p { color: #c9dbef; font-size: 14px; margin-top: 6px; }
.crumbs { font-size: 13.5px; color: var(--c-text-3); padding: 14px 0 0; }
.crumbs a { color: var(--c-text-3); }
.crumbs a:hover { color: var(--c-primary); }

/* ============ 产品列表页 ============ */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin: 22px 0 26px; }
.filter-bar button { padding: 9px 20px; border-radius: 999px; border: 1.5px solid var(--c-line); background: #fff; color: var(--c-text-2); font-size: 14.5px; transition: .15s; min-height: 42px; }
.filter-bar button:hover { border-color: var(--c-primary); color: var(--c-primary); }
.filter-bar button.on { background: var(--c-primary); border-color: var(--c-primary); color: #fff; font-weight: 600; }

/* ============ 产品详情页（1688 风格） ============ */
.pd-top { display: grid; grid-template-columns: 430px 1fr; gap: 34px; margin-top: 22px; }
@media (max-width: 900px) { .pd-top { grid-template-columns: 1fr; gap: 20px; } }
.pd-gallery .main-img { border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; aspect-ratio: 1/1; background: #fafbfc; }
.pd-gallery .main-img img { width: 100%; height: 100%; object-fit: cover; cursor: zoom-in; }
.thumbs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 9px; margin-top: 11px; }
.thumbs img { aspect-ratio: 1/1; object-fit: cover; border: 2px solid transparent; border-radius: 8px; cursor: pointer; transition: .15s; }
.thumbs img.on, .thumbs img:hover { border-color: var(--c-primary); }
.pd-head h1 { font-size: 22px; line-height: 1.5; }
.pd-head .sub { color: var(--c-text-2); font-size: 14.5px; margin-top: 9px; }
.pd-head .tags { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 12px; }
.pd-head .tags span { font-size: 12.5px; color: var(--c-primary); background: var(--c-primary-light); padding: 3px 10px; border-radius: 6px; }
.pd-price-band { background: linear-gradient(102deg, #fdf2f1, #fff7f5); border: 1px solid #f7dcda; border-radius: 10px; padding: 15px 20px; margin-top: 17px; display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.pd-price-band .p1 b { color: var(--c-price); font-size: 25px; }
.pd-price-band .p1 small { color: var(--c-text-3); font-size: 12.5px; margin-left: 6px; }
.pd-price-band .p2, .pd-price-band .p3 { font-size: 13.5px; color: var(--c-text-2); }
.pd-price-band .p2 b, .pd-price-band .p3 b { color: var(--c-text); font-size: 15px; }
.pd-meta { margin-top: 17px; display: grid; grid-template-columns: 1fr 1fr; gap: 9px 22px; font-size: 14.5px; }
.pd-meta .row { display: flex; gap: 8px; }
.pd-meta .row .k { color: var(--c-text-3); flex: 0 0 72px; }
.pd-meta .row .v { color: var(--c-text); }
.pd-actions { margin-top: 22px; display: flex; gap: 13px; flex-wrap: wrap; }
.pd-actions .btn { min-width: 168px; }
.pd-service { margin-top: 20px; display: flex; gap: 20px; flex-wrap: wrap; font-size: 13.5px; color: var(--c-text-2); }
.pd-service span { display: inline-flex; align-items: center; gap: 6px; }
.pd-service svg { width: 17px; height: 17px; stroke: var(--c-accent); }

.pd-body { display: grid; grid-template-columns: 1fr 320px; gap: 26px; margin-top: 34px; align-items: start; }
@media (max-width: 980px) { .pd-body { grid-template-columns: 1fr; } }
.panel { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; }
.panel-head { padding: 15px 22px; border-bottom: 1px solid var(--c-line); font-size: 16.5px; font-weight: 600; display: flex; align-items: center; gap: 9px; }
.panel-head::before { content: ""; width: 4px; height: 17px; background: var(--c-accent); border-radius: 2px; }
.panel-body { padding: 20px 22px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.spec-table tr:nth-child(odd) { background: var(--c-bg); }
.spec-table th, .spec-table td { padding: 11px 16px; text-align: left; border: 1px solid #eef1f5; }
.spec-table th { color: var(--c-text-3); font-weight: 500; width: 34%; }
.spec-table td { color: var(--c-text); font-weight: 500; }
.pd-desc { font-size: 15px; color: var(--c-text-2); line-height: 1.9; text-align: justify; }
.pd-desc-imgs { margin-top: 18px; display: grid; gap: 14px; }
.pd-desc-imgs img { border-radius: 10px; border: 1px solid var(--c-line); width: 100%; }
.side-panel { position: sticky; top: 84px; }
.side-contact { background: linear-gradient(160deg, var(--c-primary-dark), var(--c-primary)); color: #fff; border-radius: var(--radius); padding: 24px 22px; text-align: center; }
.side-contact h3 { font-size: 17.5px; margin-bottom: 5px; }
.side-contact .tip { font-size: 13px; color: #b9cde2; margin-bottom: 16px; }
.side-contact .tel { font-size: 23px; font-weight: 700; letter-spacing: 1px; margin: 4px 0 2px; }
.side-contact .mail { font-size: 13.5px; color: #cfe0f2; margin-bottom: 16px; }
.side-contact .btn { width: 100%; margin-top: 8px; }
.side-rel { margin-top: 18px; }
.side-rel ul li { display: flex; gap: 11px; padding: 12px 0; border-bottom: 1px dashed var(--c-line); align-items: center; }
.side-rel ul li:last-child { border-bottom: none; }
.side-rel img { width: 56px; height: 56px; border-radius: 8px; object-fit: cover; flex: 0 0 56px; }
.side-rel .t { font-size: 13.5px; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.side-rel li:hover .t { color: var(--c-primary); }

/* ============ 联系页 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin-top: 26px; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 30px 28px; }
.contact-card h3 { font-size: 18px; margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.contact-card h3 svg { width: 22px; height: 22px; stroke: var(--c-accent); }
.contact-card .row { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px dashed var(--c-line); font-size: 15px; align-items: flex-start; }
.contact-card .row:last-child { border-bottom: none; }
.contact-card .k { color: var(--c-text-3); flex: 0 0 66px; }
.big-tel { font-size: 27px; font-weight: 700; color: var(--c-primary); letter-spacing: 1px; }

/* ============ 关于页 ============ */
.about-sec { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 30px 32px; margin-top: 24px; box-shadow: var(--shadow); }
.about-sec h2 { font-size: 21px; margin-bottom: 14px; padding-left: 13px; border-left: 4px solid var(--c-accent); line-height: 1.3; }
.about-sec p { color: var(--c-text-2); font-size: 15px; margin-bottom: 11px; text-align: justify; }
.val-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 8px; }
@media (max-width: 860px) { .val-grid { grid-template-columns: 1fr; } }
.val-card { background: var(--c-bg); border-radius: 10px; padding: 20px; }
.val-card b { display: block; font-size: 16px; margin-bottom: 6px; color: var(--c-primary); }
.val-card span { font-size: 13.8px; color: var(--c-text-2); }
.factory-photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; margin-top: 14px; }
@media (max-width: 700px) { .factory-photo-grid { grid-template-columns: repeat(2, 1fr); } }
.factory-photo-grid img { border-radius: 10px; aspect-ratio: 4/3; object-fit: cover; width: 100%; border: 1px solid var(--c-line); }

/* ============ 返回顶部 ============ */
#toTop { position: fixed; right: 22px; bottom: 90px; width: 46px; height: 46px; border-radius: 50%; background: #fff; border: 1px solid var(--c-line); box-shadow: var(--shadow); display: none; align-items: center; justify-content: center; z-index: 90; }
#toTop.show { display: flex; }
#toTop svg { width: 22px; height: 22px; stroke: var(--c-primary); }

/* ============ 悬浮咨询条（移动端） ============ */
.m-fix { position: fixed; left: 0; right: 0; bottom: 0; z-index: 95; background: #fff; border-top: 1px solid var(--c-line); display: none; padding: 8px 12px calc(8px + env(safe-area-inset-bottom)); gap: 10px; }
.m-fix .btn { flex: 1; min-height: 44px; padding: 8px 10px; font-size: 15px; }
@media (max-width: 768px) { .m-fix { display: flex; } body.has-mfix { padding-bottom: 68px; } }

/* ============ 工具类 ============ */
.empty-tip { text-align: center; color: var(--c-text-3); padding: 60px 0; font-size: 15px; }
.reveal { opacity: 1; }
.reveal.pre { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.reveal.pre.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal.pre { opacity: 1; transform: none; transition: none; } }