:root {
  --brand: #1a6cff;
  --brand-dark: #0b47c4;
  --brand-soft: #eaf1ff;
  --ink: #101828;
  --ink-2: #344054;
  --ink-3: #667085;
  --line: #e4e9f2;
  --bg: #ffffff;
  --bg-soft: #f6f9ff;
  --ok: #12a150;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(16, 24, 40, .07);
  --shadow-lg: 0 16px 48px rgba(16, 24, 40, .12);
  --maxw: 1180px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}

img { max-width: 100%; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 66px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--ink); }
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 10px; flex: 0 0 34px;
  background: linear-gradient(135deg, var(--brand), #6ea8ff);
  display: grid; place-items: center; color: #fff; font-size: 17px; font-weight: 800;
}
.logo-sub { font-size: 12px; font-weight: 500; color: var(--ink-3); display: block; line-height: 1; margin-top: 3px; letter-spacing: .5px; }

.main-nav { margin-left: auto; }
.main-nav ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.main-nav a {
  display: block; padding: 8px 12px; border-radius: 9px;
  color: var(--ink-2); font-size: 15px; white-space: nowrap;
}
.main-nav a:hover { background: var(--brand-soft); color: var(--brand-dark); text-decoration: none; }
.main-nav a.active { color: var(--brand); font-weight: 700; background: var(--brand-soft); }

.nav-toggle {
  display: none; margin-left: auto; width: 42px; height: 42px; border: 1px solid var(--line);
  background: #fff; border-radius: 10px; cursor: pointer; font-size: 20px; color: var(--ink);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; font-weight: 700; font-size: 16px;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s;
  text-align: center;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 8px 22px rgba(26, 108, 255, .28); }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { background: #fff; color: var(--brand-dark); border-color: #cfe0ff; }
.btn-ghost:hover { background: var(--brand-soft); }
.btn-lg { padding: 15px 34px; font-size: 17px; }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-block { display: flex; width: 100%; }
.btn-off {
  display: flex; width: 100%; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; font-weight: 700; font-size: 16px;
  background: #eef2f8; color: #667085; border: 1px dashed #cbd5e1; cursor: not-allowed;
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: linear-gradient(180deg, #f2f7ff 0%, #ffffff 78%); padding: 68px 0 60px; }
.hero::before {
  content: ""; position: absolute; width: 620px; height: 620px; right: -180px; top: -260px;
  background: radial-gradient(circle, rgba(26, 108, 255, .16), transparent 62%); pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; width: 520px; height: 520px; left: -200px; bottom: -280px;
  background: radial-gradient(circle, rgba(64, 200, 255, .14), transparent 62%); pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 52px; align-items: center; position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px;
  background: #fff; border: 1px solid #d9e6ff; color: var(--brand-dark); font-size: 13px; font-weight: 700;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }
.hero h1 { font-size: 44px; line-height: 1.24; margin: 20px 0 18px; letter-spacing: -.5px; }
.hero h1 .hl { color: var(--brand); }
.hero-lead { font-size: 17px; color: var(--ink-2); margin: 0 0 26px; max-width: 560px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 34px; margin-top: 38px; flex-wrap: wrap; }
.hero-stats .num { font-size: 27px; font-weight: 800; color: var(--brand-dark); line-height: 1.2; }
.hero-stats .lab { font-size: 13px; color: var(--ink-3); }

/* ---------- Console mock ---------- */
.console {
  background: #0d1526; border-radius: 20px; padding: 22px; box-shadow: var(--shadow-lg);
  border: 1px solid #1d2942;
}
.console-bar { display: flex; align-items: center; gap: 7px; padding-bottom: 16px; border-bottom: 1px solid #1d2942; }
.console-bar i { width: 10px; height: 10px; border-radius: 50%; background: #2c3a58; }
.console-bar i:nth-child(1) { background: #ff5f57; }
.console-bar i:nth-child(2) { background: #febc2e; }
.console-bar i:nth-child(3) { background: #28c840; }
.console-bar span { margin-left: auto; font-size: 12px; color: #6b7a99; }
.console-row { display: flex; justify-content: space-between; padding: 13px 0; border-bottom: 1px dashed #1d2942; font-size: 14px; color: #b9c5da; }
.console-row b { color: #fff; font-weight: 600; }
.tag-ok { color: #38d18b !important; }
.tag-go { color: #5aa2ff !important; }
.console-node { display: flex; align-items: center; gap: 10px; margin-top: 18px; font-size: 13px; color: #8c9bb8; }
.console-node .flag { font-size: 18px; }

/* ---------- Sections ---------- */
.section { padding: 72px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { max-width: 760px; margin: 0 auto 46px; text-align: center; }
.section-head .kicker { color: var(--brand); font-weight: 800; font-size: 13px; letter-spacing: 1.4px; text-transform: uppercase; }
.section-head h2 { font-size: 32px; margin: 12px 0 12px; line-height: 1.35; }
.section-head p { color: var(--ink-3); margin: 0; font-size: 16px; }

.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s, border-color .18s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: #cfe0ff; text-decoration: none; }
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--ink-3); font-size: 15px; }
.card .ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: var(--brand-soft); color: var(--brand-dark); font-size: 22px; margin-bottom: 15px;
}
.card .ico.green { background: #e6f7ee; color: #0d7a3e; }
.card .ico.purple { background: #f1ebff; color: #6235c9; }
.card .ico.orange { background: #fff2e2; color: #b76b00; }
.card .ico.cyan { background: #e4f7fb; color: #0a7d95; }
.card ul { margin: 12px 0 0; padding-left: 18px; color: var(--ink-3); font-size: 15px; }
.card ul li { margin-bottom: 6px; }

/* ---------- Split / feature rows ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.feature-list { list-style: none; margin: 0; padding: 0; }
.feature-list li { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--line); }
.feature-list li:last-child { border-bottom: 0; }
.feature-list .tick {
  flex: 0 0 26px; height: 26px; border-radius: 8px; background: #e6f7ee; color: #0d7a3e;
  display: grid; place-items: center; font-size: 14px; font-weight: 800; margin-top: 3px;
}
.feature-list h3 { margin: 0 0 4px; font-size: 16px; }
.feature-list p { margin: 0; color: var(--ink-3); font-size: 14px; }

/* ---------- Stat band ---------- */
.band { background: linear-gradient(120deg, var(--brand-dark), #2f7bff); color: #fff; padding: 52px 0; }
.band-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; text-align: center; }
.band .num { font-size: 34px; font-weight: 800; }
.band .lab { opacity: .88; font-size: 14px; }

/* ---------- Trust / compliance strip ---------- */
.pill-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 18px; border-radius: 999px;
  background: #fff; border: 1px solid var(--line); font-size: 14px; color: var(--ink-2); font-weight: 600;
}
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); }

/* ---------- Platform cards ---------- */
.platform { text-align: center; }
.platform .ico { margin: 0 auto 16px; }
.platform .ver { font-size: 12px; color: var(--ink-3); margin-top: 10px; }

/* ---------- Download cards ---------- */
.dl-card {
  display: flex; flex-direction: column; gap: 12px; align-items: flex-start;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); position: relative;
}
.dl-card .dl-head { display: flex; align-items: center; gap: 12px; }
.dl-card h3 { margin: 0; font-size: 20px; }
.dl-card .meta { font-size: 13px; color: var(--ink-3); }
.dl-card .spacer { flex: 1; }
.dl-card .badge {
  position: absolute; top: 22px; right: 22px; font-size: 11px; font-weight: 700;
  background: #e6f7ee; color: #0d7a3e; padding: 3px 10px; border-radius: 999px;
}

/* ---------- Steps ---------- */
.steps { counter-reset: step; display: grid; gap: 20px; }
.step { display: flex; gap: 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.step::before {
  counter-increment: step; content: counter(step); flex: 0 0 42px; height: 42px; border-radius: 12px;
  background: var(--brand); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 18px;
}
.step h3 { margin: 2px 0 6px; font-size: 18px; }
.step p { margin: 0; color: var(--ink-3); font-size: 15px; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; min-width: 620px; }
th, td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--line); font-size: 15px; }
th { background: var(--bg-soft); font-weight: 700; color: var(--ink); white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: #fafcff; }

/* ---------- FAQ ---------- */
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 12px; box-shadow: var(--shadow); }
.faq-item summary { cursor: pointer; list-style: none; padding: 18px 22px; font-weight: 700; font-size: 16px; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); color: var(--brand); font-size: 22px; font-weight: 400; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-body { padding: 0 22px 20px; color: var(--ink-3); font-size: 15px; }
.faq-body p { margin: 0 0 10px; }

/* ---------- Reviews ---------- */
.review { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.stars { color: #ff9500; letter-spacing: 2px; font-size: 15px; }
.review p { margin: 12px 0 16px; color: var(--ink-2); font-size: 15px; }
.reviewer { display: flex; align-items: center; gap: 12px; }
.avatar {
  width: 40px; height: 40px; border-radius: 50%; background: var(--brand-soft); color: var(--brand-dark);
  display: grid; place-items: center; font-weight: 800; flex: 0 0 40px;
}
.reviewer b { display: block; font-size: 15px; }
.reviewer span { font-size: 12px; color: var(--ink-3); }

/* ---------- CTA ---------- */
.cta { background: linear-gradient(135deg, #0b47c4, #2f7bff); color: #fff; border-radius: 22px; padding: 48px 40px; text-align: center; box-shadow: var(--shadow-lg); }
.cta h2 { margin: 0 0 12px; font-size: 30px; }
.cta p { margin: 0 auto 26px; max-width: 620px; opacity: .92; }
.cta .btn-ghost { background: rgba(255, 255, 255, .14); color: #fff; border-color: rgba(255, 255, 255, .4); }
.cta .btn-white { background: #fff; color: var(--brand-dark); }

/* ---------- Breadcrumb / page head ---------- */
.page-head { background: linear-gradient(180deg, #f2f7ff, #ffffff); padding: 46px 0 40px; border-bottom: 1px solid var(--line); }
.crumb { font-size: 13px; color: var(--ink-3); margin-bottom: 14px; }
.crumb a { color: var(--ink-3); }
.crumb a:hover { color: var(--brand); }
.page-head h1 { font-size: 36px; margin: 0 0 14px; line-height: 1.3; }
.page-head .lead { margin: 0; color: var(--ink-2); font-size: 16px; max-width: 800px; }

/* ---------- Prose ---------- */
.prose { max-width: 860px; }
.prose h2 { font-size: 26px; margin: 40px 0 14px; }
.prose h3 { font-size: 20px; margin: 28px 0 10px; }
.prose p { color: var(--ink-2); margin: 0 0 14px; }
.prose ul, .prose ol { color: var(--ink-2); padding-left: 22px; margin: 0 0 16px; }
.prose li { margin-bottom: 8px; }
.prose strong { color: var(--ink); }
.tip { background: var(--brand-soft); border-left: 4px solid var(--brand); border-radius: 8px; padding: 16px 20px; margin: 18px 0; color: var(--ink-2); font-size: 15px; }

/* ---------- Footer ---------- */
.site-footer { background: #0d1526; color: #97a5be; padding: 56px 0 0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 34px; padding-bottom: 40px; }
.site-footer h4 { color: #fff; font-size: 15px; margin: 0 0 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 9px; }
.site-footer a { color: #97a5be; font-size: 14px; }
.site-footer a:hover { color: #fff; }
.footer-brand .logo { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin: 14px 0 0; max-width: 380px; }
.footer-bottom { border-top: 1px solid #1d2942; padding: 20px 0 26px; font-size: 13px; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.footer-bottom a { color: #97a5be; }

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; left: 0; right: 0; top: 66px; background: #fff;
    border-bottom: 1px solid var(--line); padding: 10px 20px 18px; box-shadow: var(--shadow);
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 2px; }
  .main-nav a {
    display: flex; align-items: center; min-height: 44px; padding: 11px 12px;
  }
  /* 移动端可点击元素统一不小于 44×44 CSS px，满足触控目标尺寸要求 */
  .btn, .btn-sm, .btn-lg { min-height: 44px; }
  .btn-sm { padding: 10px 18px; }
  .main-nav .btn { width: 100%; justify-content: center; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .band-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 54px 0; }
  .hero { padding: 44px 0 46px; }
  .hero h1 { font-size: 28px; }
  .page-head h1 { font-size: 27px; }
  .section-head h2 { font-size: 25px; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta { padding: 36px 22px; }
  .cta h2 { font-size: 24px; }
  .hero-stats { gap: 22px; }
  /* 表格小屏：启用触摸惯性滚动并给出边界阴影提示 */
  .table-wrap {
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    background:
      linear-gradient(to right, #fff 30%, rgba(255,255,255,0)) left center / 34px 100% no-repeat local,
      linear-gradient(to left, #fff 30%, rgba(255,255,255,0)) right center / 34px 100% no-repeat local,
      radial-gradient(farthest-side at 0 50%, rgba(26,108,255,.16), rgba(26,108,255,0)) left center / 14px 100% no-repeat scroll,
      radial-gradient(farthest-side at 100% 50%, rgba(26,108,255,.16), rgba(26,108,255,0)) right center / 14px 100% no-repeat scroll,
      #fff;
  }
}