/* 电池厂商 ERP 宣传站样式
   页面配色沿用系统品牌深蓝；页脚布局与视觉对齐 sport-canguan/intro 最新版 */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: #0a1a2c; color: #e8eef6; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: #fff; color: #0f2233; padding: 6px 14px; border-radius: 0 0 8px 0;
  font-size: 13px; text-decoration: none;
}
.skip-link:focus { left: 0; }

/* ---------- 顶栏 ---------- */
.topbar { position: sticky; top: 0; z-index: 20; background: rgba(10, 26, 44, 0.9); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
.topbar-in { display: flex; align-items: center; gap: 12px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-logo {
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, #3f6ef6, #1c4e6f);
  display: flex; align-items: center; justify-content: center;
}
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: 0.5px; white-space: nowrap; }
.brand-badge { font-size: 11px; color: #9fc2ea; border: 1px solid rgba(127, 179, 255, 0.4); border-radius: 20px; padding: 1px 10px; white-space: nowrap; }
.spacer { flex: 1; }
.top-nav { display: flex; gap: 16px; margin-left: auto; align-items: center; flex-wrap: nowrap; }
.top-link { color: #c3ccd6; text-decoration: none; font-size: 13px; white-space: nowrap; }
.top-link:hover { color: #fff; }
.topbar .btn-primary { margin-left: 16px; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 6px; background: linear-gradient(135deg, #3f6ef6, #2f56d0);
  color: #fff; text-decoration: none; font-size: 14px; font-weight: 600; white-space: nowrap;
  padding: 9px 20px; border-radius: 8px; box-shadow: 0 6px 18px rgba(63, 110, 246, 0.35);
  transition: transform 0.12s, box-shadow 0.12s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(63, 110, 246, 0.45); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px; color: #dbe7f6; text-decoration: none; font-size: 14px; white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.35); padding: 9px 20px; border-radius: 8px; transition: all 0.12s;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.6); }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 72px 0 64px; background:
    radial-gradient(1100px 480px at 80% -12%, rgba(63, 110, 246, 0.28), transparent 62%),
    radial-gradient(800px 420px at 6% 112%, rgba(28, 78, 111, 0.5), transparent 60%),
    linear-gradient(160deg, #0f2233 0%, #0a1a2c 100%); }
.hero::after { content: ""; position: absolute; inset: 0; opacity: 0.5; pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 44px 44px; }
.hero-in { position: relative; z-index: 1; max-width: 1120px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr); gap: 44px; align-items: center; }
.hero-tag { display: inline-block; font-size: 12px; letter-spacing: 2px; color: #9fc2ea; border: 1px solid rgba(127, 179, 255, 0.35); padding: 4px 14px; border-radius: 20px; margin-bottom: 20px; background: rgba(63, 110, 246, 0.12); }
.hero h1 { font-size: 39px; line-height: 1.28; font-weight: 800; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: #7fb3ff; }
.hero-sub { margin-top: 16px; font-size: 15px; color: #b8c6d8; }
.hero-cta { margin-top: 28px; display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero-note { margin-top: 14px; font-size: 12px; color: #9ab0c8; }
.hero-note b { color: #7fb3ff; font-weight: 600; }
.hero-fig { position: relative; }
.hero-fig img { display: block; width: 100%; border-radius: 16px; border: 1px solid rgba(127, 179, 255, 0.25); box-shadow: 0 24px 60px rgba(2, 12, 27, 0.5); }
.hero-fig figcaption { margin-top: 10px; font-size: 12px; color: #7d90a8; text-align: center; }

/* ---------- 数据条 ---------- */
.strip { border-top: 1px solid rgba(255, 255, 255, 0.08); border-bottom: 1px solid rgba(255, 255, 255, 0.08); background: rgba(255, 255, 255, 0.03); }
.strip-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; padding: 20px 0; }
.strip-item { text-align: center; font-size: 12.5px; color: #c3ccd6; }
.strip-item b { display: block; font-size: 14px; color: #fff; margin-bottom: 2px; }
.strip-item b em { font-style: normal; color: #7fb3ff; }

/* ---------- 业务场景图片 ---------- */
.scenes { padding: 60px 0 26px; }
.sec-title { text-align: center; margin-bottom: 34px; }
.sec-title h2 { font-size: 27px; font-weight: 800; letter-spacing: 0.5px; }
.sec-title p { color: #8fa3b6; font-size: 14px; margin-top: 8px; }
.sec-title p em { color: #7fb3ff; font-style: normal; }
.scene-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.scene-card { margin: 0; border-radius: 14px; overflow: hidden; border: 1px solid rgba(255, 255, 255, 0.1); background: rgba(255, 255, 255, 0.03); transition: transform 0.15s, border-color 0.15s; }
.scene-card:hover { transform: translateY(-3px); border-color: rgba(127, 179, 255, 0.5); }
.scene-card img { display: block; width: 100%; height: 250px; object-fit: cover; transition: transform 0.3s; }
.scene-card:hover img { transform: scale(1.03); }
.scene-card figcaption { padding: 12px 16px 14px; }
.scene-card figcaption b { display: block; font-size: 14.5px; color: #fff; margin-bottom: 2px; }
.scene-card figcaption span { font-size: 12.5px; color: #a9b8cc; }

/* ---------- 痛点方案 ---------- */
.pain { padding: 60px 0 30px; }
.pain .sec-title em { color: #7fb3ff; font-style: normal; }
.pain-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pain-card { background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025)); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px; padding: 22px 22px 20px; transition: transform 0.15s, border-color 0.15s; }
.pain-card:hover { transform: translateY(-3px); border-color: rgba(127, 179, 255, 0.5); }
.pain-no { display: inline-block; font-size: 11px; letter-spacing: 1.5px; color: #7fb3ff; border: 1px solid rgba(127, 179, 255, 0.35); border-radius: 12px; padding: 2px 10px; margin-bottom: 10px; }
.pain-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.pain-card > p { font-size: 13px; color: #a9b8cc; margin-bottom: 14px; }
.pain-sol { background: rgba(63, 110, 246, 0.08); border: 1px solid rgba(127, 179, 255, 0.15); border-radius: 8px; padding: 14px 16px; }
.pain-sol b { font-size: 12px; color: #7fb3ff; letter-spacing: 1px; }
.pain-sol ul { list-style: none; margin: 8px 0 10px; }
.pain-sol li { font-size: 13px; color: #c3ccd6; padding: 3px 0; padding-left: 16px; position: relative; }
.pain-sol li::before { content: "✓"; position: absolute; left: 0; color: #7fb3ff; font-weight: 700; }
.pain-link { color: #7fb3ff; font-size: 13px; font-weight: 600; text-decoration: none; }
.pain-link:hover { text-decoration: underline; }

/* ---------- 业务流程闭环 ---------- */
.flow { padding: 56px 0 26px; }
.flow-img { display: block; width: 100%; border-radius: 14px; border: 1px solid rgba(255, 255, 255, 0.1); box-shadow: 0 18px 48px rgba(2, 12, 27, 0.4); }

/* ---------- 产品模块 ---------- */
.feat { padding: 60px 0 26px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025)); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px; padding: 20px 20px 18px; transition: transform 0.15s, border-color 0.15s, background 0.15s; }
.card:hover { transform: translateY(-3px); border-color: rgba(127, 179, 255, 0.5); background: rgba(255, 255, 255, 0.075); }
.card-ic { width: 40px; height: 40px; border-radius: 9px; display: flex; align-items: center; justify-content: center; font-size: 19px; background: linear-gradient(135deg, rgba(63, 110, 246, 0.35), rgba(28, 78, 111, 0.4)); margin-bottom: 12px; }
.card h3 { font-size: 15.5px; font-weight: 700; margin-bottom: 6px; }
.card p { font-size: 13px; color: #a9b8cc; }
.grid-note { text-align: center; margin-top: 22px; font-size: 12px; color: #6f8298; }
.grid-note a { color: #7fb3ff; text-decoration: none; }
.grid-note a:hover { text-decoration: underline; }

/* ---------- 对比表 ---------- */
.compare { padding: 60px 0 30px; }
.compare-wrap { overflow-x: auto; }
.compare-tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.compare-tbl th { background: rgba(63, 110, 246, 0.15); color: #fff; font-weight: 700; padding: 12px 16px; text-align: left; border-bottom: 2px solid rgba(127, 179, 255, 0.3); white-space: nowrap; }
.compare-tbl th.hl { color: #7fb3ff; }
.compare-tbl td { padding: 11px 16px; border-bottom: 1px solid rgba(255, 255, 255, 0.07); color: #b8c6d8; }
.compare-tbl td:first-child { color: #e8eef6; font-weight: 600; white-space: nowrap; }
.compare-tbl td.hl { color: #fff; font-weight: 500; }
.compare-tbl tr:hover td { background: rgba(255, 255, 255, 0.03); }

/* ---------- 合规条 ---------- */
.comp { margin: 44px 0 0; padding: 30px 0; background: linear-gradient(120deg, rgba(63, 110, 246, 0.16), rgba(28, 78, 111, 0.22)); border-top: 1px solid rgba(127, 179, 255, 0.25); border-bottom: 1px solid rgba(127, 179, 255, 0.25); }
.comp-in { max-width: 1120px; margin: 0 auto; padding: 0 24px; display: flex; gap: 28px; flex-wrap: wrap; align-items: center; justify-content: space-between; }
.comp-txt b { font-size: 17px; color: #fff; }
.comp-txt p { font-size: 13px; color: #a9b8cc; margin-top: 6px; max-width: 680px; }
.comp-tags { display: flex; gap: 10px; flex-wrap: wrap; }
.comp-tag { font-size: 12px; color: #dbe7f6; border: 1px solid rgba(255, 255, 255, 0.3); border-radius: 20px; padding: 3px 12px; }

/* ---------- 驾驶舱大屏场景横幅 ---------- */
.cockpit { position: relative; overflow: hidden; padding: 72px 0; }
.cockpit-bg { position: absolute; inset: 0; }
.cockpit-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.32; }
.cockpit::before { content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(10, 26, 44, 0.97) 4%, rgba(10, 26, 44, 0.9) 42%, rgba(10, 26, 44, 0.62) 78%, rgba(10, 26, 44, 0.5) 100%),
    linear-gradient(180deg, rgba(10, 26, 44, 0.9), transparent 30%, transparent 70%, rgba(10, 26, 44, 0.94)); }
.cockpit-in { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 48px; align-items: center; }
.cockpit-tag { display: inline-block; font-size: 12px; letter-spacing: 2px; color: #9fc2ea; border: 1px solid rgba(127, 179, 255, 0.35); padding: 4px 14px; border-radius: 20px; margin-bottom: 16px; background: rgba(63, 110, 246, 0.16); }
.cockpit-copy h2 { font-size: 30px; font-weight: 800; line-height: 1.3; letter-spacing: 0.5px; }
.cockpit-copy h2 em { font-style: normal; color: #7fb3ff; }
.cockpit-copy > p { margin-top: 14px; font-size: 14px; color: #b8c6d8; }
.cockpit-cta { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.cockpit-cards { display: flex; flex-direction: column; gap: 14px; }
.cockpit-card { background: rgba(13, 32, 52, 0.82); border: 1px solid rgba(127, 179, 255, 0.28); border-radius: 14px; padding: 16px 18px; backdrop-filter: blur(6px); }
.cockpit-card h3 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.cockpit-card h3 span { margin-right: 8px; }
.cockpit-card p { font-size: 12.5px; color: #a9b8cc; }

/* ---------- 双端使用 ---------- */
.duo { padding: 56px 0 30px; }
.duo-in { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.duo-card { background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025)); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px; padding: 24px; }
.duo-card h3 { font-size: 17px; margin-bottom: 8px; }
.duo-card p { font-size: 13px; color: #a9b8cc; margin-bottom: 16px; }

/* ---------- 角色登录 ---------- */
.roles { padding: 60px 0 30px; }
.roles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.role-card { background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025)); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px; padding: 22px 20px; text-align: center; transition: transform 0.15s, border-color 0.15s; }
.role-card:hover { transform: translateY(-3px); border-color: rgba(127, 179, 255, 0.5); }
.role-ic { font-size: 30px; margin-bottom: 8px; }
.role-tag { display: inline-block; font-size: 11px; letter-spacing: 1px; color: #7fb3ff; border: 1px solid rgba(127, 179, 255, 0.35); border-radius: 12px; padding: 2px 10px; margin-bottom: 8px; }
.role-card h3 { font-size: 15.5px; font-weight: 700; margin-bottom: 6px; }
.role-card p { font-size: 12.5px; color: #a9b8cc; margin-bottom: 10px; min-height: 56px; }
.role-card ul { list-style: none; font-size: 12px; color: #8fa3b6; margin-bottom: 14px; }
.role-card li { padding: 2px 0; }
.role-card .btn-primary { width: 100%; justify-content: center; font-size: 13px; padding: 8px 16px; }

/* ---------- 部署流程 ---------- */
.deploy { padding: 56px 0 20px; }
.deploy-steps { display: flex; align-items: flex-start; justify-content: center; gap: 0; }
.step { flex: 1; max-width: 300px; text-align: center; padding: 0 16px; }
.step-no { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, #3f6ef6, #2f56d0); color: #fff; font-size: 20px; font-weight: 800; margin-bottom: 12px; box-shadow: 0 6px 18px rgba(63, 110, 246, 0.35); }
.step h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.step p { font-size: 13px; color: #a9b8cc; }
.step-arrow { color: #3f6ef6; font-size: 28px; padding-top: 10px; font-weight: 300; flex-shrink: 0; }

/* ---------- FAQ ---------- */
.faq { padding: 56px 0 20px; }
.faq-in { max-width: 860px; }
.faq details { background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 10px; margin-bottom: 10px; padding: 4px 18px; }
.faq summary { cursor: pointer; padding: 12px 0; font-size: 14.5px; font-weight: 600; color: #e8eef6; list-style: none; position: relative; padding-right: 26px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 2px; top: 50%; transform: translateY(-50%); color: #7fb3ff; font-size: 18px; transition: transform 0.15s; }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 2px 0 14px; font-size: 13.5px; color: #b8c6d8; }
.faq details a { color: #7fb3ff; }

/* ---------- CTA ---------- */
.cta { padding: 56px 0 64px; }
.cta h2 { font-size: 26px; font-weight: 800; }
.cta p { color: #8fa3b6; font-size: 14px; margin: 10px 0 26px; }

/* ---------- 页脚（完全对齐 sport-canguan/intro 最新布局） ---------- */
footer { background: #151515; color: #bbb; padding: 48px 0 28px; font-size: 0.88rem; }
footer a:hover { color: #fff; }
.foot-main {
  display: grid;
  grid-template-columns: 1.2fr 2fr 1fr;
  gap: 36px 40px;
  margin-bottom: 28px;
}
.foot-brand h4, .foot-cols h4 { color: #fff; margin: 0 0 12px; font-size: 0.95rem; }
.foot-brand p { margin: 0 0 8px; line-height: 1.6; }
.foot-brand .foot-org { color: #6f8298; font-size: 0.8rem; }
.foot-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.foot-cols ul { margin: 0; padding: 0; list-style: none; }
.foot-cols li { margin: 8px 0; }
.foot-cols a { text-decoration: none; color: #bbb; }
.foot-contact h4 { color: #fff; margin: 0 0 12px; font-size: 0.95rem; }
.foot-phone { margin: 0; line-height: 1.6; }
.foot-phone a { color: #7fb3ff; font-weight: 700; font-size: 1.08rem; text-decoration: none; }
.foot-phone a:hover { color: #fff; }
.foot-wecom { margin: 14px 0 0; text-align: center; }
.foot-wecom img { width: 112px; height: 112px; border-radius: 12px; background: #fff; padding: 6px; display: block; margin: 0 auto; }
.foot-wecom figcaption { margin-top: 8px; font-size: 0.78rem; color: #888; }
.copy {
  border-top: 1px solid #2a2a2a; padding-top: 16px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  color: #777; font-size: 0.8rem;
}
.copy a { color: #999; text-decoration: none; }
.copy a:hover { color: #fff; text-decoration: underline; }

/* ---------- 演示水印 ---------- */
.demo-wm {
  position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(4, 1fr);
  overflow: hidden;
}
.demo-wm__item {
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; color: rgba(255, 255, 255, 0.045); white-space: nowrap;
  letter-spacing: 2px; user-select: none;
  transform: rotate(-20deg) scale(1.15);
}

/* ---------- 底部悬浮 dock ---------- */
.dock {
  position: fixed; right: 16px; bottom: 16px; z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
}
.dock a {
  display: flex; align-items: center; gap: 6px;
  background: rgba(15, 34, 51, 0.92); border: 1px solid rgba(127, 179, 255, 0.4);
  color: #e8eef6; font-size: 12px; text-decoration: none;
  padding: 8px 12px; border-radius: 999px;
  box-shadow: 0 8px 20px rgba(2, 12, 27, 0.45); backdrop-filter: blur(8px);
  transition: background 0.12s;
}
.dock a:hover { background: rgba(63, 110, 246, 0.9); }
.dock .ico { font-size: 14px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card, .btn-primary, .btn-ghost { transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .top-nav { display: none; }
}
@media (max-width: 980px) {
  .hero-in, .cockpit-in { grid-template-columns: 1fr; gap: 28px; }
  .hero h1 { font-size: 30px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .foot-main { grid-template-columns: 1fr 1fr; }
  .roles-grid { grid-template-columns: 1fr 1fr; }
  .deploy-steps { flex-direction: column; align-items: center; gap: 10px; }
  .step-arrow { transform: rotate(90deg); padding: 4px 0; }
  .step { max-width: 100%; }
}
@media (max-width: 640px) {
  .strip-in { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .grid, .duo-in { grid-template-columns: 1fr; }
  .foot-main, .foot-cols { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn-primary, .hero-cta .btn-ghost { justify-content: center; }
  .demo-wm__item { font-size: 10px; letter-spacing: 1px; }
  .roles-grid { grid-template-columns: 1fr; }
  .scene-card img { height: 200px; }
  .compare-tbl { font-size: 12px; }
  .compare-tbl th, .compare-tbl td { padding: 8px 10px; }
  .foot-contact .foot-wecom img { width: 96px; height: 96px; }
}