/* ===== XY-IOT 新站样式 · v2026-09 ===== */
:root {
  --c-primary: #0a7fd7;
  --c-primary-d: #0649b8;
  --c-primary-2: #1a63c4;
  /* 辅助色 · 红（主蓝 + 辅红） */
  --c-orange: #e03131;
  --c-orange-d: #c92a2a;
  --c-accent: #e03131;
  --c-accent-d: #c92a2a;
  --c-teal: #03d2c5;
  --c-bg: #ffffff;
  --c-bg-2: #f5f8fc;
  --c-bg-3: #eef3fa;
  --c-text: #1b2433;
  --c-text-2: #4a5566;
  --c-text-3: #7d8696;
  --c-border: #dbe4ee;
  --c-line: #e7edf3;
  --c-danger: #d9534f;
  --c-success: #4caf73;
  --shadow-sm: 0 1px 2px rgba(11,58,111,.06);
  --shadow-md: 0 6px 24px rgba(11,58,111,.08);
  --shadow-lg: 0 18px 48px rgba(11,58,111,.14);
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --maxw: 1200px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--c-primary-d); text-decoration: none; }
a:hover { color: var(--c-primary); }
img { max-width: 100%; display: block; }

/* ===== 顶部导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--c-line);
}
.nav-wrap {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 17px; color: var(--c-text); }
.brand .mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-d));
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 13px;
  box-shadow: var(--shadow-sm);
}
.nav-list { display: flex; gap: 28px; list-style: none; padding: 0; margin: 0; }
.nav-list a {
  color: var(--c-text-2); font-size: 14.5px; font-weight: 500;
  padding: 6px 0; position: relative;
}
.nav-list a:hover { color: var(--c-primary-d); }
.nav-list a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -16px;
  height: 2px; background: var(--c-primary);
}
.nav-cta {
  background: var(--c-primary); color: #fff !important;
  padding: 8px 18px; border-radius: var(--r-md); font-size: 14px;
  transition: background .2s;
}
.nav-cta:hover { background: var(--c-primary-d); color: #fff; }
.nav-toggle { display: none; background: none; border: 0; font-size: 22px; cursor: pointer; color: var(--c-text); }

@media (max-width: 860px) {
  .nav-list { display: none; }
  .nav-toggle { display: block; }
  .nav-list.open {
    display: flex; flex-direction: column; gap: 12px;
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; padding: 16px 24px; border-bottom: 1px solid var(--c-line);
  }
}

/* ===== 通用容器 ===== */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-tight { padding: 56px 0; }
.section-bg { background: var(--c-bg-2); }
.section-dark { background: #0b3a6f; color: #fff; }
.section-dark .h1, .section-dark .h2 { color: #fff; }
.h1 { font-size: 38px; font-weight: 700; line-height: 1.25; margin: 0 0 16px; }
.h2 { font-size: 28px; font-weight: 700; line-height: 1.3; margin: 0 0 14px; }
.h3 { font-size: 20px; font-weight: 600; line-height: 1.4; margin: 0 0 10px; }
.h4 { font-size: 16px; font-weight: 600; margin: 0 0 6px; }
.lead { font-size: 17px; color: var(--c-text-2); max-width: 720px; }
.eyebrow { color: var(--c-primary-d); font-weight: 600; font-size: 13px; letter-spacing: 1px; text-transform: uppercase; }
.muted { color: var(--c-text-3); }
.tag {
  display: inline-block; padding: 2px 10px; font-size: 12px;
  background: var(--c-bg-3); color: var(--c-primary-d);
  border-radius: 999px; margin-right: 6px;
}
.tag-warn { background: #fff3e0; color: #b76b00; }
.tag-ok { background: #e6f5ee; color: #1e7a4b; }

/* ===== 按钮 ===== */
.btn { display: inline-block; padding: 12px 26px; border-radius: var(--r-md); font-weight: 600; font-size: 15px; transition: all .2s; border: 0; cursor: pointer; }
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-d); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--c-primary-d); border: 1px solid var(--c-primary-d); }
.btn-ghost:hover { background: var(--c-primary-d); color: #fff; }
.btn-orange { background: var(--c-orange); color: #fff; }
.btn-orange:hover { background: var(--c-orange-d); color: #fff; }

/* ===== Hero ===== */
.hero {
  padding: 80px 0 72px;
  background: radial-gradient(1200px 480px at 80% -10%, #e6f0fa 0%, transparent 60%),
              radial-gradient(800px 360px at 10% 30%, #ffecec 0%, transparent 50%),
              linear-gradient(180deg, #fff 0%, var(--c-bg-2) 100%);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.hero h1 { font-size: 44px; line-height: 1.2; margin: 12px 0 18px; font-weight: 700; }
.hero h1 span.hl { color: var(--c-primary-d); }
.hero h1 .slogan { display: block; font-size: .62em; line-height: 1.35; margin-top: 8px; font-weight: 600; letter-spacing: .5px; white-space: nowrap; }
.hero .sub { font-size: 17px; color: var(--c-text-2); margin-bottom: 28px; max-width: 540px; }
.hero-stats { display: flex; gap: 36px; margin-top: 28px; flex-wrap: wrap; }
.hero-stats .stat .num { font-size: 28px; font-weight: 700; color: var(--c-primary-d); }
.hero-stats .stat .lbl { font-size: 13px; color: var(--c-text-3); }
.hero-art {
  background: #fff; border-radius: var(--r-lg); box-shadow: var(--shadow-lg);
  padding: 20px; position: relative; overflow: hidden;
}
.hero-art img { width: 100%; border-radius: var(--r-md); }

@media (max-width: 860px) {
  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 30px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero .sub br { display: none; }
}

@media (max-width: 400px) {
  .hero h1 { font-size: 26px; }
  .hero h1 .slogan { white-space: normal; letter-spacing: 0; }
}

/* ===== 卡片网格 ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-lg);
  padding: 26px 24px; transition: all .2s;
}
.card:hover { border-color: var(--c-primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card .icon {
  width: 44px; height: 44px; border-radius: var(--r-md);
  background: linear-gradient(135deg, #e6f0fa, #d0e3f6);
  color: var(--c-primary-d); display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 14px; font-weight: 700;
}
.card .icon.orange { background: linear-gradient(135deg, #ffe3e3, #ffb3b3); color: #c92a2a; }
.card .icon.teal { background: linear-gradient(135deg, #e0faf8, #a4ece6); color: #066c66; }
.card .icon.red { background: linear-gradient(135deg, #fce7e7, #f5b7b7); color: #a32d2d; }

@media (max-width: 860px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}

/* ===== 四层防护 · 时间窗 ===== */
.tl-grid {
  display: grid; grid-template-columns: repeat(5, 1fr);
  border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--c-line);
}
.tl-col { position: relative; padding: 24px 14px 26px; text-align: center; background: #fff; }
.tl-col + .tl-col { border-left: 1px solid var(--c-line); }
.tl-col::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; }
.tl-col.c3::before { background: var(--c-orange); }
.tl-col.c4::before { background: #7f1d1d; }
.tl-col.c1::before { background: var(--c-primary); }
.tl-col.c2::before { background: var(--c-primary-2); }
.tl-col.c0 { background: var(--c-bg-2); }
.tl-col.c0::before { background: var(--c-text-3); }
.tl-phase { font-size: 12px; color: var(--c-text-3); letter-spacing: .5px; }
.tl-title { font-size: 15px; font-weight: 600; margin: 7px 0 13px; line-height: 1.5; }
.tl-who { font-size: 12px; font-weight: 600; padding: 4px 11px; border-radius: 999px; display: inline-block; }
.tl-col.c3 .tl-who { background: #ffe9e9; color: #c92a2a; }
.tl-col.c4 .tl-who { background: #c92a2a; color: #fff; }
.tl-col.c1 .tl-who { background: #e6f0fa; color: var(--c-primary-d); }
.tl-col.c2 .tl-who { background: #eef3fa; color: var(--c-primary-d); }
.tl-col.c0 .tl-who { background: #e4e9ef; color: var(--c-text-3); }
@media (max-width: 1000px) {
  .tl-grid { grid-template-columns: 1fr 1fr; }
  .tl-col:nth-child(odd) { border-left: 0; }
  .tl-col:nth-child(n+3) { border-top: 1px solid var(--c-line); }
  .tl-col:last-child { grid-column: 1 / -1; }
}

/* 层标签 */
.layer-tag {
  display: inline-block; font-size: 12px; font-weight: 600; padding: 3px 12px;
  border-radius: 999px; margin-bottom: 12px; letter-spacing: .5px;
}
.layer-tag.l1 { background: var(--c-primary); color: #fff; }
.layer-tag.l2 { background: #eef3fa; color: var(--c-primary-d); }
.layer-tag.l3 { background: #ffe9e9; color: #c92a2a; }
.layer-tag.l4 { background: var(--c-orange); color: #fff; }

/* ===== 四层防护 · 层卡（两列，留白更足） ===== */
.layer-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.layer-card { position: relative; padding: 26px 28px 26px 34px; }
.layer-card::before {
  content: ""; position: absolute; left: 0; top: 24px; bottom: 24px; width: 4px;
  border-radius: 0 999px 999px 0;
}
.layer-card.lc1::before { background: var(--c-primary); }
.layer-card.lc2::before { background: var(--c-primary-2); }
.layer-card.lc3::before { background: var(--c-orange); }
.layer-card.lc4::before { background: #7f1d1d; }
.layer-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 14px; }
.layer-head .layer-tag { margin-bottom: 0; }
.layer-num { font-size: 32px; font-weight: 800; line-height: 1; letter-spacing: -1px; color: #e3edf9; }
.layer-card.lc3 .layer-num { color: #fbe2e2; }
.layer-card.lc4 .layer-num { color: #f7dfda; }
.layer-card h3 { margin-bottom: 10px; }
.layer-card > p { line-height: 1.78; color: var(--c-text-2); }
.layer-note {
  font-size: 13px; color: var(--c-text-3); margin: 16px 0 0;
  padding-top: 14px; border-top: 1px dashed var(--c-line);
}
@media (max-width: 860px) { .layer-grid { grid-template-columns: 1fr; } }

/* ===== 补充提示块（与层卡同栅格对齐，但弱化为脚注语气） ===== */
.notes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.note {
  background: #f6f8fb;
  border: 1px dashed #d3dde9;
  border-radius: var(--r-md);
  padding: 17px 24px 18px;
  font-size: 13.5px; line-height: 1.85; color: var(--c-text-3);
}
.note-info { background: #eff6fe; border-color: #bfd9f1; }
.note-label {
  display: flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 600; color: var(--c-text-2);
  margin-bottom: 6px; letter-spacing: .2px;
}
.note-label svg { width: 15px; height: 15px; flex: none; color: #9aa6b6; }
.note-info .note-label { color: var(--c-primary-d); }
.note-info .note-label svg { color: var(--c-primary); }
.note p { margin: 0; }
@media (max-width: 860px) { .notes { grid-template-columns: 1fr; } }


/* ===== 对比表 ===== */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.compare-col { background: #fff; padding: 32px 28px; }
.compare-col.pro { background: linear-gradient(180deg, #f3f8fe 0%, #fff 60%); border-right: 1px solid var(--c-line); }
.compare-col.pro h3 { color: var(--c-primary-d); }
.compare-table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 14px; }
.compare-table td { padding: 10px 0; border-bottom: 1px dashed var(--c-line); vertical-align: top; }
.compare-table td:first-child { color: var(--c-text-3); width: 38%; }
.compare-table tr:last-child td { border-bottom: 0; }
.compare-price { font-size: 22px; color: var(--c-orange); font-weight: 700; margin-top: 16px; }
.compare-price small { font-size: 13px; color: var(--c-text-3); font-weight: 400; margin-left: 4px; }

/* ===== 时间线 / 步骤 ===== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: s; }
.step { position: relative; padding: 28px 22px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-lg); }
.step::before { counter-increment: s; content: counter(s); position: absolute; top: -16px; left: 22px;
  width: 32px; height: 32px; border-radius: 50%; background: var(--c-primary); color: #fff;
  font-weight: 700; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.step h4 { margin-top: 12px; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .steps { grid-template-columns: 1fr; } }

/* ===== 告警通道 ===== */
.channels { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.ch {
  background: #fff; border-radius: var(--r-lg); padding: 26px 22px;
  border-top: 4px solid var(--c-primary); box-shadow: var(--shadow-sm);
  transition: all .2s;
}
.ch:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.ch.wechat { border-color: #1aad19; }
.ch.voice { border-color: var(--c-accent); }
.ch.phone { border-color: var(--c-danger); }
.ch .ico {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--c-bg-3); color: var(--c-primary-d);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 12px; font-weight: 700;
}
.ch.wechat .ico { background: #e9f7e8; color: #1aad19; }
.ch.voice .ico { background: #ffe3e3; color: #c92a2a; }
.ch.phone .ico { background: #fce7e7; color: var(--c-danger); }
@media (max-width: 860px) { .channels { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .channels { grid-template-columns: 1fr; } }

/* ===== FAQ ===== */
.faq { max-width: 880px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-md); margin-bottom: 12px; padding: 18px 22px; }
.faq-item h4 { margin: 0 0 6px; color: var(--c-text); font-size: 15px; }
.faq-item p { margin: 0; color: var(--c-text-2); font-size: 14px; }

/* ===== 表单 ===== */
.form { max-width: 640px; margin: 0 auto; background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 36px 36px 30px; box-shadow: var(--shadow-md); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-row.single { grid-template-columns: 1fr; }
.form label { display: block; font-size: 13px; color: var(--c-text-2); margin-bottom: 6px; font-weight: 500; }
.form input, .form select, .form textarea {
  width: 100%; padding: 11px 14px; font-size: 14px;
  border: 1px solid var(--c-border); border-radius: var(--r-sm);
  background: #fff; font-family: inherit; color: var(--c-text);
  transition: border .15s, box-shadow .15s;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(10,127,215,.12);
}
.form textarea { min-height: 100px; resize: vertical; }
.form .hint { font-size: 12px; color: var(--c-text-3); margin-top: 4px; }
.form .row-code { display: flex; gap: 10px; }
.form .row-code input { flex: 1; }
.form .row-code button { padding: 0 16px; background: var(--c-bg-3); border: 1px solid var(--c-border); border-radius: var(--r-sm); color: var(--c-primary-d); font-size: 13px; cursor: pointer; }
.form .submit { width: 100%; padding: 14px; background: var(--c-primary); color: #fff; border: 0; border-radius: var(--r-md); font-size: 15px; font-weight: 600; cursor: pointer; transition: background .2s; }
.form .submit:hover { background: var(--c-primary-d); }
.form .legal { font-size: 12px; color: var(--c-text-3); margin-top: 14px; text-align: center; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } .form { padding: 24px 20px; } }

/* ===== 视频/媒体卡片 ===== */
.media-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.media-card { background: #fff; border-radius: var(--r-lg); overflow: hidden; border: 1px solid var(--c-line); transition: all .2s; }
.media-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.media-thumb { aspect-ratio: 16/9; background: #0b3a6f; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 32px; position: relative; }
.media-card .body { padding: 18px 20px; }
@media (max-width: 860px) { .media-grid { grid-template-columns: 1fr; } }

/* ===== 联系信息 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 26px; }
.contact-card h3 { margin-top: 0; }
.contact-row { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--c-line); }
.contact-row:last-child { border-bottom: 0; }
.contact-row .lbl { color: var(--c-text-3); min-width: 72px; font-size: 14px; }
.contact-row .val { color: var(--c-text); font-size: 14px; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }

/* ===== Footer ===== */
.footer { background: #0b2548; color: #cdd6e3; padding: 56px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 36px; }
.footer h5 { color: #fff; font-size: 14px; margin: 0 0 14px; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 8px; font-size: 13px; }
.footer a { color: #cdd6e3; }
.footer a:hover { color: #fff; }
.footer .brand { color: #fff; margin-bottom: 14px; }
.footer .desc { font-size: 13px; line-height: 1.7; color: #94a3bd; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08); padding-top: 22px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 12px; color: #7d8fa8;
}
.footer-bottom .icp a { color: #7d8fa8; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .footer-grid { grid-template-columns: 1fr; } }

/* ===== 实用 ===== */
.text-center { text-align: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; } .mt-48 { margin-top: 48px; } .mt-56 { margin-top: 56px; } .mt-64 { margin-top: 64px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; } .mb-32 { margin-bottom: 32px; }
.flex { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.flex-col { display: flex; flex-direction: column; gap: 12px; }
.callout {
  border-left: 4px solid var(--c-orange); background: #fff8ec;
  padding: 14px 18px; border-radius: 0 var(--r-md) var(--r-md) 0;
  font-size: 14px; color: #5b4300;
}
.callout.warn { border-color: var(--c-danger); background: #fdecec; color: #7a1f1f; }
.callout.info { border-color: var(--c-primary); background: #eaf3fb; color: #0b3a6f; }

/* 图片占位/容器 */
.device-frame { background: linear-gradient(135deg, #f4f8fd, #e7eef7); border-radius: var(--r-lg); padding: 30px; border: 1px solid var(--c-line); }
.device-frame img { width: 100%; height: auto; }
/* 深色区块内的图框（场景 07 综合园区）：结构与浅色版完全一致，只换底色与描边以适应深底 */
.device-frame.on-dark { background: rgba(255, 255, 255, .06); border-color: rgba(255, 255, 255, .16); }

/* ===== 平台一瞥 · 截图墙（四张同尺寸 16:9，等比等高） ===== */
.platform-grid .device-frame { padding: 14px; }
.platform-grid .device-frame img {
  display: block; border-radius: 10px;
  box-shadow: 0 6px 18px rgba(10, 60, 120, .12);
}

/* ===== 产品矩阵 · 双版本并排 ===== */
.product-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; position: relative; }
.product-card { position: relative; background: linear-gradient(135deg, #f4f8fd, #e7eef7); border-radius: var(--r-lg); padding: 24px; border: 1px solid var(--c-line); overflow: hidden; }
.product-card img { width: 100%; height: auto; display: block; border-radius: var(--r-sm); }
.product-card .tag { position: absolute; top: 12px; left: 12px; background: var(--c-orange); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 999px; letter-spacing: .5px; box-shadow: 0 2px 6px rgba(224,49,49,.3); z-index: 2; }
@media (max-width: 640px) { .product-grid { grid-template-columns: 1fr; } }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

/* ===== Logo ===== */
.brand .logo-img { height: 32px; width: auto; display: block; }
.footer .brand .logo-img { height: 26px; background: #fff; padding: 5px 10px; border-radius: 6px; }

/* ===== 二维码 ===== */
.qr-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.qr-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-lg);
  padding: 24px 20px; text-align: center; transition: all .2s;
}
.qr-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--c-primary); }
.qr-card img { width: 150px; height: 150px; object-fit: contain; margin: 0 auto 14px; }
.qr-card h4 { margin: 0 0 4px; font-size: 15px; }
.qr-card .desc { font-size: 13px; color: var(--c-text-3); margin: 0; }
@media (max-width: 860px) { .qr-grid { grid-template-columns: 1fr; } }

/* ===== 资质墙 ===== */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cert-item, .cert-wide {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-lg);
  padding: 16px; text-align: center; transition: all .2s;
}
.cert-item:hover, .cert-wide:hover { box-shadow: var(--shadow-md); border-color: var(--c-primary); }
.cert-item img {
  width: 100%; height: 360px; object-fit: contain;
  background: #fff; border: 1px solid #edf1f6; border-radius: var(--r-md); margin-bottom: 14px;
}
.cert-wide img {
  width: 100%; height: auto; display: block;
  background: #fff; border: 1px solid #edf1f6; border-radius: var(--r-md); margin-bottom: 14px;
}
.cert-item h4, .cert-wide h4 { margin: 0 0 4px; font-size: 14px; }
.cert-item p, .cert-wide p { margin: 0; font-size: 12px; color: var(--c-text-3); }
.cert-wide { margin-top: 24px; }
@media (max-width: 860px) { .cert-grid { grid-template-columns: 1fr 1fr; } .cert-item img { height: 300px; } }
@media (max-width: 540px) { .cert-grid { grid-template-columns: 1fr; } .cert-item img { height: 340px; } }

/* ===== 视频封面 ===== */
.media-thumb { aspect-ratio: 16/9; overflow: hidden; position: relative; }
.media-thumb img { width: 100%; height: 100%; object-fit: cover; }
.media-thumb .play {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(11,58,111,.35); color: #fff; font-size: 40px; transition: background .2s;
}
.media-card:hover .play { background: rgba(11,58,111,.55); }

/* ===== 操作视频集（微信公众号合集卡片） ===== */
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card {
  display: block; background: #fff; border: 1px solid var(--c-line);
  border-radius: var(--r-lg); overflow: hidden; text-decoration: none; color: inherit;
  transition: box-shadow .2s, transform .2s, border-color .2s;
}
.video-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); border-color: var(--c-primary); }
.video-thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #0b3a6f; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.video-card:hover .video-thumb img { transform: scale(1.04); }
.video-thumb::after {
  content: ''; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(180deg, rgba(6,30,60,.10) 0%, rgba(6,30,60,0) 38%, rgba(6,30,60,.42) 100%);
}
.video-play {
  position: absolute; left: 10px; bottom: 10px; z-index: 2;
  display: inline-flex; align-items: center; gap: 5px;
  background: rgba(255,255,255,.94); color: var(--c-primary-d);
  font-size: 12px; font-weight: 700; padding: 4px 11px 4px 9px;
  border-radius: 999px; transition: background .2s, color .2s;
}
.video-play svg { width: 13px; height: 13px; flex: none; }
.video-card:hover .video-play { background: var(--c-orange); color: #fff; }
.video-idx {
  position: absolute; left: 10px; top: 10px; z-index: 2;
  background: rgba(255,255,255,.93); color: var(--c-primary-d);
  font-size: 12px; font-weight: 700; letter-spacing: .5px;
  padding: 3px 9px; border-radius: 999px;
}
.video-dur {
  position: absolute; right: 10px; bottom: 10px; z-index: 2;
  background: rgba(6,30,60,.76); color: #fff; font-size: 12px;
  padding: 3px 9px; border-radius: 999px; font-variant-numeric: tabular-nums;
}
.video-card .body { padding: 16px 18px 18px; }
.video-card h3 { font-size: 15px; line-height: 1.55; margin: 0; font-weight: 600; }
.video-card .muted { font-size: 12px; margin: 6px 0 0; }
.video-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.video-actions .muted { font-size: 13px; margin: 0; }
@media (max-width: 980px) { .video-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .video-grid { grid-template-columns: 1fr; } }

/* ===== 通用 ===== */
table.spec { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--r-md); overflow: hidden; box-shadow: var(--shadow-sm); }
table.spec th, table.spec td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--c-line); font-size: 14px; }
table.spec th { background: var(--c-bg-3); color: var(--c-text-2); font-weight: 600; }
table.spec tr:last-child td { border-bottom: 0; }

/* ===== 京东选购卡片 ===== */
.buy-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
@media (max-width: 860px) { .buy-grid { grid-template-columns: 1fr; } }
.buy-card {
  position: relative; background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: 30px 28px 26px; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; transition: all .2s;
}
.buy-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--c-primary); }
.buy-card.featured { border-color: var(--c-primary); box-shadow: var(--shadow-md); }
.buy-tag {
  position: absolute; top: -13px; left: 28px; background: var(--c-orange); color: #fff;
  font-size: 12px; font-weight: 600; padding: 4px 14px; border-radius: 999px; letter-spacing: .5px;
}
.buy-card h3 { margin: 0 0 4px; font-size: 20px; }
.buy-spec { margin: 0 0 2px; font-size: 13px; color: var(--c-text-3); }
.buy-desc { margin: 10px 0 0; font-size: 14px; color: var(--c-text-2); }
.buy-list {
  list-style: none; padding: 0; margin: 18px 0 22px; flex: 1;
  font-size: 14px; line-height: 2.1; color: var(--c-text-2);
}
.buy-list li::before { content: "✓"; color: var(--c-primary); font-weight: 700; margin-right: 9px; }
.buy-card .btn { width: 100%; text-align: center; display: block; }
.buy-note { margin: 12px 0 0; font-size: 12px; color: var(--c-text-3); text-align: center; }
.buy-card .jd-badge {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  font-size: 12px; color: var(--c-text-3); margin-bottom: 14px;
}
.buy-card .jd-badge i {
  font-style: normal; background: var(--c-orange); color: #fff;
  padding: 1px 7px; border-radius: 4px; font-weight: 700; font-size: 12px;
}

/* ===== 联系我们 · 大按钮入口 ===== */
.entry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 860px) { .entry-grid { grid-template-columns: 1fr; } }
.entry-card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--r-lg);
  padding: 28px 24px; text-align: center; box-shadow: var(--shadow-sm); transition: all .2s;
}
.entry-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--c-primary); }
.entry-card .ei { font-size: 30px; line-height: 1; margin-bottom: 14px; }
.entry-card h4 { margin: 0 0 8px; font-size: 17px; }
.entry-card p { margin: 0 0 18px; font-size: 13px; color: var(--c-text-2); }

/* ===== 合作加盟 · 首页招商条 ===== */
.cta-band {
  display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center;
  background: linear-gradient(135deg, #f3f8fe 0%, #fff 58%);
  border: 1px solid var(--c-line); border-left: 4px solid var(--c-primary);
  border-radius: var(--r-lg); padding: 30px 36px; box-shadow: var(--shadow-sm);
}
.cta-band h3 { margin: 6px 0 8px; font-size: 21px; font-weight: 700; line-height: 1.4; }
.cta-band p { margin: 0; font-size: 14.5px; line-height: 1.8; color: var(--c-text-2); max-width: 760px; }
.cta-band .btn { white-space: nowrap; }
@media (max-width: 860px) {
  .cta-band { grid-template-columns: 1fr; gap: 20px; padding: 24px 22px; }
  .cta-band .btn { display: block; text-align: center; }
}