/* ===========================================================
   广州市泉溪通信科技有限公司 · 企业官网
   设计风格：简约大气 / 现代科技
   =========================================================== */

:root {
  /* 主色：深邃科技蓝 */
  --c-ink: #0e1b2e;          /* 近黑蓝，主文字 */
  --c-navy: #163a63;         /* 深蓝，区块底色 */
  --c-primary: #2f93e8;      /* 品牌蓝 */
  --c-primary-d: #1f7fcf;    /* 深品牌蓝（hover） */
  --c-accent: #7cc8ff;       /* 亮蓝点缀 */
  --c-line: #e6eaf0;         /* 描边/分割线 */
  --c-bg: #ffffff;           /* 页面底色 */
  --c-bg-soft: #f6f8fb;      /* 浅灰底 */
  --c-bg-soft2: #eef2f8;     /* 次浅底 */
  --c-text: #2a3342;         /* 正文 */
  --c-muted: #6b7787;        /* 次要文字 */
  --c-white: #ffffff;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(20, 41, 74, .06);
  --shadow-md: 0 14px 40px rgba(20, 41, 74, .10);
  --shadow-lg: 0 24px 60px rgba(20, 41, 74, .16);

  --maxw: 1200px;
  --header-h: 72px;

  --ff: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, system-ui, sans-serif;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 72px 0; }

/* ---------- 文字工具 ---------- */
h1, h2, h3, h4 { color: var(--c-ink); line-height: 1.25; font-weight: 700; letter-spacing: -.01em; }
.eyebrow {
  display: inline-block; font-size: 14px; font-weight: 600; letter-spacing: .14em;
  color: var(--c-primary); text-transform: uppercase; margin-bottom: 14px;
}
.section-title { font-size: clamp(26px, 3.4vw, 40px); margin-bottom: 16px; }
.section-lead { color: var(--c-muted); font-size: 17px; max-width: 640px; }
.center { text-align: center; }
.center .section-lead { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--c-primary); color: #fff; box-shadow: 0 10px 24px rgba(47,147,232,.28); }
.btn-primary:hover { background: var(--c-primary-d); transform: translateY(-2px); box-shadow: 0 16px 32px rgba(47,147,232,.34); }
.btn-ghost { background: transparent; color: var(--c-ink); border: 1px solid var(--c-line); }
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-light { background: #fff; color: var(--c-navy); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline-light { border: 1px solid rgba(255,255,255,.5); color: #fff; }
.btn-outline-light:hover { background: rgba(255,255,255,.12); }
.btn-outline-navy { border: 1px solid var(--c-navy); color: var(--c-navy); }
.btn-outline-navy:hover { background: rgba(22,58,99,.08); transform: translateY(-2px); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100; height: var(--header-h);
  background: rgba(255,255,255,.86); backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--c-line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; color: var(--c-ink); }
.brand .logo { width: 38px; height: 38px; flex: 0 0 auto; }
.brand .name { font-size: 17px; line-height: 1.15; }
.brand .name small { display: block; font-size: 11px; font-weight: 500; color: var(--c-muted); letter-spacing: .12em; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 9px 16px; border-radius: 999px; font-size: 15px; color: var(--c-text); font-weight: 500;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--c-primary); background: var(--c-bg-soft2); }
.nav-links a.active { color: var(--c-primary); background: var(--c-bg-soft2); }
.nav-cta { margin-left: 8px; }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 12px; border: 1px solid var(--c-line); }
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--c-ink); margin: 3px auto; transition: .25s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 500px at 78% -8%, rgba(124,200,255,.22), transparent 60%),
    radial-gradient(700px 480px at 8% 110%, rgba(47,147,232,.18), transparent 55%),
    linear-gradient(180deg, #f4f8fd 0%, #ffffff 100%);
  padding: 84px 0 96px;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(34px, 5vw, 58px); margin-bottom: 22px; }
.hero h1 .hl { color: var(--c-primary); }
.hero p.lead { font-size: 18px; color: var(--c-muted); max-width: 520px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 38px; margin-top: 46px; flex-wrap: wrap; }
.hero-stats .num { font-size: 30px; font-weight: 800; color: var(--c-ink); }
.hero-stats .lab { font-size: 14px; color: var(--c-muted); }
.hero-visual { position: relative; }
.hero-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: 20px; padding: 26px;
  box-shadow: var(--shadow-lg);
}
.hero-card .device { width: 100%; border-radius: 14px; background: var(--c-bg-soft2); aspect-ratio: 16/10; overflow: hidden; position: relative; }
.hero-card .device img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-carousel { position: relative; width: 100%; height: 100%; }
.hero-carousel img { position: absolute; inset: 0; opacity: 0; transition: opacity .9s ease; }
.hero-carousel img.active { opacity: 1; }

/* ---------- 客户/信任条 ---------- */
.trustbar { border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); background: var(--c-bg-soft); }
.trustbar .container { display: flex; align-items: center; gap: 36px; padding: 22px 24px; flex-wrap: wrap; }
.trustbar .label { font-size: 13px; color: var(--c-muted); letter-spacing: .08em; }
.trustbar .logos { display: flex; gap: 30px; align-items: center; flex-wrap: wrap; }
.trustbar .logos span { font-weight: 700; color: #9aa6b6; font-size: 17px; letter-spacing: .02em; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.feature-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 32px 28px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.feature-card .ic {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, #eaf2ff, #d6e6ff); color: var(--c-primary); margin-bottom: 20px;
}
.feature-card h3 { font-size: 19px; margin-bottom: 10px; }
.feature-card p { color: var(--c-muted); font-size: 15px; }

/* ---------- 产品预览 ---------- */
.prod-preview { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.prod-card {
  position: relative; border-radius: var(--radius); overflow: hidden; color: var(--c-navy);
  min-height: 280px; padding: 30px; display: flex; flex-direction: column; justify-content: flex-end;
  transition: transform .3s ease, box-shadow .3s ease;
}
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.prod-card .bg { position: absolute; inset: 0; z-index: 0; }
.prod-card .bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(22,58,99,0) 0%, rgba(22,58,99,.12) 100%); }
.prod-card > * { position: relative; z-index: 1; }
.prod-card .kicker { font-size: 13px; letter-spacing: .14em; opacity: .8; }
.prod-card h3 { color: var(--c-navy); font-size: 23px; margin: 8px 0 8px; }
.prod-card p { color: rgba(22,58,99,.85); font-size: 14px; }
.prod-card .more { margin-top: 16px; font-weight: 600; color: var(--c-navy); display: inline-flex; gap: 6px; align-items: center; }

/* ---------- 应用场景 ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.scene {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 30px 26px; transition: background .25s, border-color .25s, box-shadow .2s, transform .25s ease;
}
.scene:hover { background: #fff; border-color: var(--c-primary); box-shadow: var(--shadow-sm); transform: translateY(-4px); }
.scene .ic {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, #eaf2ff, #d6e6ff); color: var(--c-primary); margin-bottom: 16px;
}
.scene h3 { font-size: 18px; margin-bottom: 8px; }
.scene p { color: var(--c-muted); font-size: 14.5px; }

/* ---------- CTA 区（与产品矩阵同浅蓝调） ---------- */
.cta {
  background: linear-gradient(135deg, #eef5ff 0%, #cfe6ff 100%);
  color: var(--c-navy); border-radius: 24px; padding: 64px 56px; text-align: center; position: relative; overflow: hidden;
}
.cta::before { content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%; background: radial-gradient(circle, rgba(255,255,255,.45), transparent 70%); top: -160px; right: -120px; }
.cta h2 { color: var(--c-navy); font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 14px; position: relative; }
.cta p { color: rgba(22,58,99,.85); max-width: 560px; margin: 0 auto 28px; position: relative; }
.cta .hero-actions { justify-content: center; position: relative; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--c-ink); color: #c7d0dd; padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.3fr; gap: 40px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: .04em; }
.site-footer .brand .name { color: #fff; }
.site-footer .brand .name small { color: #8b97a8; }
.footer-about { color: #aab4c2; font-size: 14.5px; max-width: 300px; margin-top: 16px; }
.footer-links a { display: block; padding: 6px 0; color: #aab4c2; font-size: 14.5px; transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; padding: 7px 0; font-size: 14.5px; color: #aab4c2; }
.footer-contact .ic { color: var(--c-accent); flex: 0 0 auto; margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 44px; padding-top: 22px; font-size: 13px; color: #8b97a8; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- 关于我们 ---------- */
.page-hero { background: linear-gradient(135deg, #ffffff, #7cc8ff); color: var(--c-navy); padding: 120px 0 90px; position: relative; overflow: hidden; }
.page-hero::after { content: ""; position: absolute; inset: 0; background: radial-gradient(600px 300px at 80% 0, rgba(255,255,255,.55), transparent 60%); }
.page-hero .container { position: relative; }
.page-hero h1 { color: var(--c-navy); font-size: clamp(30px, 4.4vw, 50px); margin-bottom: 16px; }
.page-hero p { color: rgba(22,58,99,.85); font-size: 18px; max-width: 640px; }
.breadcrumb { font-size: 14px; color: rgba(22,58,99,.7); margin-bottom: 18px; }
.breadcrumb a { color: var(--c-primary); }
.breadcrumb a:hover { color: var(--c-primary-d); }

/* 时间线 */
.timeline { position: relative; margin-top: 20px; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--c-line); }
.timeline li { position: relative; padding-bottom: 34px; }
.timeline li::before { content: ""; position: absolute; left: -29px; top: 5px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--c-primary); }
.timeline .yr { font-weight: 800; color: var(--c-primary); font-size: 18px; }
.timeline h4 { font-size: 17px; margin: 4px 0 6px; }
.timeline p { color: var(--c-muted); font-size: 15px; }

/* 价值观 */
.value-card { text-align: center; padding: 34px 26px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); }
.value-card .ic { width: 56px; height: 56px; margin: 0 auto 18px; border-radius: 16px; display: grid; place-items: center; background: var(--c-bg-soft2); color: var(--c-primary); }
.value-card h3 { font-size: 18px; margin-bottom: 8px; }
.value-card p { color: var(--c-muted); font-size: 14.5px; }

/* 资质 */
.badges { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 10px; }
.badge { border: 1px solid var(--c-line); border-radius: 999px; padding: 9px 18px; font-size: 14px; color: var(--c-text); background: #fff; display: inline-flex; gap: 8px; align-items: center; }
.badge .ic { color: var(--c-primary); }

/* 数据块 */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; padding: 30px 18px; background: var(--c-bg-soft); border-radius: var(--radius); }
.stat .num { font-size: 40px; font-weight: 800; color: var(--c-primary); line-height: 1; }
.stat .lab { color: var(--c-muted); margin-top: 10px; font-size: 14.5px; }

/* ---------- 产品服务页 ---------- */
.cat-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 30px; }
.cat-head .ic { width: 56px; height: 56px; flex: 0 0 auto; border-radius: 16px; display: grid; place-items: center; background: linear-gradient(135deg, #eaf2ff, #d6e6ff); color: var(--c-primary); }
.cat-head h2 { font-size: 26px; margin-bottom: 6px; }
.cat-head p { color: var(--c-muted); font-size: 15px; }

.product-row { padding: 56px 0; border-bottom: 1px solid var(--c-line); }
.product-row:last-child { border-bottom: none; }
.product-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 8px; }
.p-item { border: 1px solid var(--c-line); border-radius: var(--radius); padding: 26px; background: #fff; transition: border-color .25s, box-shadow .25s, transform .25s; }
.p-item:hover { border-color: var(--c-primary); box-shadow: var(--shadow-sm); transform: translateY(-4px); }
.p-item .pic { height: 170px; border-radius: var(--radius-sm); background: #f3f6fb; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; overflow: hidden; }
.p-item .pic img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; display: block; }
.p-item .pic.pic--cover { padding: 0; }
.p-item .pic.pic--cover img { width: 100%; height: 100%; object-fit: cover; }
.p-item h3 { font-size: 18px; margin-bottom: 8px; }
.p-item p { color: var(--c-muted); font-size: 14px; margin-bottom: 14px; }
.p-item .specs { display: flex; flex-wrap: wrap; gap: 8px; }
.p-item .specs span { font-size: 12.5px; color: var(--c-primary); background: var(--c-bg-soft2); padding: 4px 10px; border-radius: 999px; }
.p-item { position: relative; }
.qr-pop {
  position: absolute; inset: 0; z-index: 5; border-radius: inherit;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  padding: 18px; text-align: center;
  background: rgba(15, 38, 68, .93);
  opacity: 0; visibility: hidden; transition: opacity .25s ease, visibility .25s ease;
}
.qr-pop img { width: 124px; height: 124px; background: #fff; border-radius: 8px; padding: 6px; box-shadow: 0 6px 18px rgba(0,0,0,.25); }
.qr-pop .qr-text { color: #eaf4ff; font-size: 14px; font-weight: 500; }
.qr-pop .qr-sub { color: #9fc3ee; font-size: 12.5px; }
.p-item:hover .qr-pop, .solution-card:hover .qr-pop { opacity: 1; visibility: visible; }

.solution-card { background: linear-gradient(135deg, #eef5ff 0%, #cfe6ff 100%); color: var(--c-navy); border-radius: var(--radius); padding: 30px; position: relative; overflow: hidden; transition: transform .3s ease, box-shadow .3s ease; }
.solution-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.solution-card h3 { color: var(--c-navy); font-size: 23px; margin-bottom: 12px; }
.solution-card p { color: rgba(22,58,99,.8); font-size: 14.5px; margin-bottom: 18px; }
.solution-card ul li { display: flex; gap: 10px; padding: 7px 0; color: rgba(22,58,99,.85); font-size: 14.5px; }
.solution-card ul .ic { color: var(--c-primary); flex: 0 0 auto; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: start; }
.info-card { display: flex; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--c-line); }
.info-card:last-child { border-bottom: none; }
.info-card .ic { width: 48px; height: 48px; flex: 0 0 auto; border-radius: 12px; display: grid; place-items: center; background: var(--c-bg-soft2); color: var(--c-primary); }
.info-card .t { font-weight: 600; color: var(--c-ink); }
.info-card .v { color: var(--c-muted); font-size: 15px; }

/* 科技感背景面板 */
.contact-tech {
  position: relative;
  min-height: 480px;
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(120% 100% at 85% 0%, rgba(56,182,255,.28), transparent 60%),
    radial-gradient(120% 120% at 0% 100%, rgba(31,95,214,.36), transparent 55%),
    linear-gradient(135deg, #14335c 0%, #1c4572 52%, #12365d 100%);
  border: 1px solid rgba(120,200,255,.22);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 40px;
  color: #eaf4ff;
}
.contact-tech::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(120,200,255,.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,200,255,.10) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(130% 100% at 50% 20%, #000 35%, transparent 100%);
  mask-image: radial-gradient(130% 100% at 50% 20%, #000 35%, transparent 100%);
  pointer-events: none;
}
.contact-tech::after {
  content: "";
  position: absolute; width: 340px; height: 340px; border-radius: 50%;
  top: -90px; right: -90px;
  background: radial-gradient(circle, rgba(56,182,255,.40), transparent 70%);
  filter: blur(6px);
  animation: ctGlow 7s ease-in-out infinite;
  pointer-events: none;
}
@keyframes ctGlow { 0%,100% { transform: translate(0,0); opacity: .9; } 50% { transform: translate(-26px,38px); opacity: .6; } }
.ct-badge {
  position: absolute; top: 26px; left: 40px;
  font-size: 12.5px; letter-spacing: 2px; font-weight: 600; color: #8fd4ff;
  padding: 6px 14px; border: 1px solid rgba(120,200,255,.3); border-radius: 999px;
  background: rgba(120,200,255,.06);
}
.ct-eq {
  position: absolute; left: 0; right: 0; top: 30%;
  display: flex; align-items: flex-end; justify-content: center;
  gap: 7px; height: 130px; padding: 0 44px;
  pointer-events: none;
}
.ct-eq span {
  width: 8px; height: 100%; border-radius: 6px;
  background: linear-gradient(180deg, #9bdcff, #2f93e8);
  transform: scaleY(.18); transform-origin: bottom;
  box-shadow: 0 0 14px rgba(56,182,255,.5);
  animation: ctEq 1.5s ease-in-out infinite;
}
.ct-eq span:nth-child(2n) { animation-delay: .15s; }
.ct-eq span:nth-child(3n) { animation-delay: .32s; }
.ct-eq span:nth-child(4n) { animation-delay: .48s; }
.ct-eq span:nth-child(5n) { animation-delay: .62s; }
.ct-eq span:nth-child(7n) { animation-delay: .78s; }
@keyframes ctEq { 0%,100% { transform: scaleY(.18); } 50% { transform: scaleY(.95); } }
.ct-quote { position: relative; z-index: 2; }
.ct-quote p { font-size: 19px; line-height: 1.6; color: #eaf4ff; font-weight: 500; margin: 0 0 12px; }
.ct-quote__by { font-size: 13.5px; color: #8fd4ff; letter-spacing: .5px; }
.ct-dot { position: absolute; border-radius: 50%; background: #38b6ff; box-shadow: 0 0 12px rgba(56,182,255,.8); pointer-events: none; }
.ct-dot--1 { width: 9px; height: 9px; top: 33%; left: 18%; animation: ctPulse 3s ease-in-out infinite; }
.ct-dot--2 { width: 7px; height: 7px; top: 24%; right: 22%; background: #7cc8ff; animation: ctPulse 3.6s ease-in-out infinite .4s; }
.ct-dot--3 { width: 6px; height: 6px; bottom: 30%; left: 30%; animation: ctPulse 3.2s ease-in-out infinite .8s; }
@keyframes ctPulse { 0%,100% { transform: scale(1); opacity: .5; } 50% { transform: scale(1.6); opacity: 1; } }

.map { margin-top: 30px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--c-line); background: var(--c-bg-soft2); }
.map .map-inner { height: 320px; position: relative; background:
    linear-gradient(rgba(47,147,232,.05), rgba(47,147,232,.05)),
    repeating-linear-gradient(0deg, #e9eef5 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, #e9eef5 0 1px, transparent 1px 40px),
    #f6f8fb; }
.map .pin { position: absolute; top: 46%; left: 52%; transform: translate(-50%, -100%); text-align: center; }
.map .pin .mk { width: 30px; height: 30px; background: var(--c-primary); border-radius: 50% 50% 50% 0; transform: rotate(-45deg); margin: 0 auto; box-shadow: 0 8px 18px rgba(47,147,232,.4); }
.map .pin .mk::after { content: ""; position: absolute; inset: 0; margin: auto; width: 10px; height: 10px; background: #fff; border-radius: 50%; transform: rotate(45deg) translate(0, 0); }
.map .pin .addr { margin-top: 8px; background: #fff; padding: 6px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--c-ink); box-shadow: var(--shadow-sm); white-space: nowrap; }
.map .cap { padding: 12px 16px; background: #fff; border-top: 1px solid var(--c-line); font-size: 13.5px; color: var(--c-muted); }

/* toast */
.toast { position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%) translateY(20px); background: var(--c-ink); color: #fff; padding: 14px 22px; border-radius: 999px; font-size: 14.5px; box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: .3s; z-index: 200; display: flex; gap: 10px; align-items: center; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast .ic { color: #49d17a; }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .grid-3, .grid-4, .prod-preview, .scene-grid, .product-list, .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .nav-links { position: fixed; inset: var(--header-h) 0 auto 0; background: #fff; flex-direction: column; align-items: stretch; padding: 14px 20px 22px; gap: 4px; border-bottom: 1px solid var(--c-line); box-shadow: var(--shadow-md); transform: translateY(-130%); transition: transform .3s; }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 12px 14px; }
  .nav-cta { margin: 6px 0 0; }
  .nav-toggle { display: block; }
  .grid-3, .grid-4, .prod-preview, .scene-grid, .product-list, .stat-grid, .field-row { grid-template-columns: 1fr; }
  .contact-tech { min-height: 340px; padding: 28px 26px; }
  .ct-eq { top: 26%; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta { padding: 48px 26px; }
  .hero-stats { gap: 24px; }
}

/* ---------- 左右悬浮客服条（垂直居中） ---------- */
.side-widget {
  position: fixed; top: 50%; transform: translateY(-50%); z-index: 9999;
  display: flex; flex-direction: column; gap: 14px;
}
.side-widget--right { right: 18px; }
.side-widget--left { left: 18px; }
.side-widget__item { position: relative; }
.side-widget__btn {
  width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: var(--c-primary); color: #fff; box-shadow: 0 6px 18px rgba(47,147,232,.35);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease; cursor: pointer;
}
.side-widget__btn:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(47,147,232,.45); background: var(--c-navy); }
.side-widget__panel {
  position: absolute; top: 50%; transform: translateY(-50%) translateX(8px); opacity: 0; visibility: hidden;
  min-width: 210px; padding: 18px 20px; border-radius: 14px; background: var(--c-primary); color: #fff;
  box-shadow: 0 8px 24px rgba(47,147,232,.35); text-align: center; white-space: nowrap;
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
}
.side-widget--right .side-widget__panel { right: 58px; }
.side-widget--left .side-widget__panel { left: 58px; right: auto; transform: translateY(-50%) translateX(-8px); }
.side-widget__item:hover .side-widget__panel { opacity: 1; visibility: visible; transform: translateY(-50%) translateX(0); }
.side-widget__panel h4 { color: #fff; font-size: 16px; margin-bottom: 6px; }
.side-widget__panel p { color: rgba(255,255,255,.9); font-size: 13px; margin-bottom: 12px; }
.side-widget__panel a {
  display: inline-block; background: #fff; color: var(--c-primary); padding: 7px 18px; border-radius: 20px;
  font-size: 13px; font-weight: 600; transition: transform .2s ease, box-shadow .2s ease;
}
.side-widget__panel a:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,.12); }
.side-widget__qr {
  width: 130px; height: 130px; background: #fff; border-radius: 8px; margin: 0 auto 10px;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.side-widget__qr img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 640px) {
  .side-widget--right { right: 12px; }
  .side-widget--left { left: 12px; }
  .side-widget__btn { width: 44px; height: 44px; }
  .side-widget--right .side-widget__panel { right: 52px; }
  .side-widget--left .side-widget__panel { left: 52px; }
  .side-widget__panel { min-width: 180px; padding: 14px 16px; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
}