/* 算数·工程管家 官网样式 v1.16
   设计基线：深蓝商务 + 暖橙强调；无外链字体、无框架依赖 */

:root {
  --ink: #0b1b33;
  --ink-2: #22344f;
  --muted: #5b6b83;
  --muted-2: #8494a9;
  --line: #e4eaf3;
  --line-2: #eef3fa;
  --bg: #f6f9fe;
  --white: #fff;
  --brand: #1d4ed8;
  --brand-2: #2563eb;
  --brand-3: #3b82f6;
  --brand-soft: #eef4ff;
  --accent: #f59e0b;
  --accent-2: #fbbf24;
  --accent-soft: #fff7e6;
  --ok: #16a34a;
  --shadow-sm: 0 2px 8px rgba(13, 32, 61, .05);
  --shadow: 0 10px 30px rgba(13, 32, 61, .08);
  --shadow-lg: 0 22px 60px rgba(13, 32, 61, .12);
  --r-sm: 10px;
  --r: 16px;
  --r-lg: 24px;
  --wrap: 1180px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-2); }
h1, h2, h3, h4 { margin: 0; line-height: 1.28; letter-spacing: -.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
button { font: inherit; }
:focus-visible { outline: 2px solid var(--brand-3); outline-offset: 3px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 999;
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 8px;
  transition: top .2s;
}
.skip-link:focus { top: 12px; color: #fff; }

/* ---------- 顶栏 ---------- */
.site-head {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.head-inner {
  max-width: var(--wrap); margin: 0 auto; padding: 0 24px;
  height: 68px; display: flex; align-items: center; gap: 28px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; flex: none; }
.logo:hover { color: var(--ink); }
.logo-mark { width: 34px; height: 34px; flex: none; }
.logo-txt { display: flex; flex-direction: column; line-height: 1.15; }
.logo-txt b { font-size: 17px; letter-spacing: .02em; color: var(--ink); }
.logo-txt span { font-size: 10.5px; color: var(--muted-2); letter-spacing: .12em; }

.nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 14px; border-radius: 9px;
  color: var(--ink-2); font-size: 15px; font-weight: 500;
  white-space: nowrap;
}
.nav-link:hover, .nav-item.is-open > .nav-link { background: var(--brand-soft); color: var(--brand); }
.nav-link[aria-current="page"] { color: var(--brand); font-weight: 600; }
.caret {
  width: 6px; height: 6px; border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translateY(-2px); opacity: .55; transition: transform .2s;
}
.nav-item.is-open .caret { transform: rotate(225deg) translateY(-1px); }

/* 二级导航（mega panel） */
.nav-panel {
  position: absolute; left: 50%; top: calc(100% + 6px);
  transform: translate(-50%, 8px);
  width: 660px; max-width: calc(100vw - 40px);
  background: #fff; border: 1px solid var(--line);
  border-radius: 18px; box-shadow: var(--shadow-lg);
  padding: 18px; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .9fr); gap: 16px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .16s ease, transform .16s ease, visibility .16s;
}
.nav-item.is-open .nav-panel {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translate(-50%, 0);
}
.nav-panel--wide { width: 720px; }
.nav-panel::before {
  content: ""; position: absolute; left: 0; right: 0; top: -10px; height: 10px;
}
.nav-links { display: grid; gap: 2px; align-content: start; }
.nav-links a {
  display: block; padding: 9px 10px; border-radius: 10px; color: var(--ink-2);
}
.nav-links a:hover { background: var(--bg); }
.nav-links strong { display: block; font-size: 14px; font-weight: 600; }
.nav-links em {
  display: block; font-style: normal; font-size: 12px; color: var(--muted-2);
  line-height: 1.5; margin-top: 1px;
}
.nav-feature {
  display: flex; flex-direction: column; gap: 8px;
  padding: 12px; border-radius: 14px; background: linear-gradient(165deg, #f3f8ff, #eaf2ff);
  border: 1px solid #dfeafa;
}
.nav-feature img { width: 100%; height: 108px; object-fit: cover; border-radius: 9px; display: block; }
.nav-feature strong { font-size: 13.5px; }
.nav-feature em { font-style: normal; font-size: 12px; color: var(--muted); line-height: 1.55; }
.nav-feature .nav-cta { margin-top: auto; font-size: 12.5px; font-weight: 600; color: var(--brand); }

.head-actions { display: flex; align-items: center; gap: 10px; flex: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px; border: 1px solid transparent;
  font-size: 14.5px; font-weight: 600; line-height: 1.2;
  transition: transform .15s, box-shadow .2s, background .2s, color .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--brand), #1a3fbd); color: #fff; box-shadow: 0 6px 18px rgba(29, 78, 216, .22); }
.btn-primary:hover { color: #fff; box-shadow: 0 10px 24px rgba(29, 78, 216, .3); }
.btn-accent { background: linear-gradient(135deg, #ffb020, #f59e0b); color: #201400; box-shadow: 0 6px 18px rgba(245, 158, 11, .25); }
.btn-accent:hover { color: #201400; }
.btn-ghost { border-color: #cfdcef; color: var(--ink-2); background: #fff; }
.btn-ghost:hover { border-color: var(--brand-3); color: var(--brand); }
.btn-sm { padding: 9px 15px; font-size: 13.5px; border-radius: 9px; }
.btn-lg { padding: 14px 26px; font-size: 15.5px; border-radius: 12px; }

.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line);
  background: #fff; border-radius: 10px; align-items: center; justify-content: center;
  flex-direction: column; gap: 4px; cursor: pointer;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink-2); border-radius: 2px; transition: .2s; }

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section--tight { padding: 60px 0; }
.section--soft { background: var(--bg); }
.section--ink { background: #0a1729; color: #e8eefb; }
.section--ink .lead { color: #a7b7cf; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--brand); margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--accent); border-radius: 2px; }
.h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 700; letter-spacing: -.02em; }
.h3 { font-size: clamp(19px, 2vw, 23px); font-weight: 700; }
.lead { color: var(--muted); font-size: 16px; max-width: 720px; }
.sec-head { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; margin-bottom: 40px; }
.sec-head--center { align-items: center; text-align: center; }
.sec-head--center .lead { text-align: center; }
.sec-head-row {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 36px;
}
.sec-head-row .lead { max-width: 620px; }

.grid { display: grid; gap: 18px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r);
  padding: 24px; box-shadow: var(--shadow-sm);
  transition: box-shadow .2s, transform .2s, border-color .2s;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: #d6e2f4; }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14px; }
.card-ico {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: var(--brand-soft); color: var(--brand); margin-bottom: 14px;
}
.card-ico svg { width: 22px; height: 22px; }
.card-ico--accent { background: var(--accent-soft); color: #b45309; }

/* 数字条 */
.metrics {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0; border: 1px solid var(--line); border-radius: var(--r);
  background: #fff; overflow: hidden; box-shadow: var(--shadow-sm);
}
.metric { padding: 22px 24px; border-right: 1px solid var(--line); }
.metric:last-child { border-right: 0; }
.metric b { display: block; font-size: 30px; font-weight: 750; letter-spacing: -.03em; color: var(--ink); line-height: 1.15; }
.metric b small { font-size: 15px; font-weight: 600; margin-left: 2px; color: var(--brand); }
.metric span { display: block; font-size: 13px; color: var(--muted); margin-top: 4px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 420px at 78% -10%, rgba(37, 99, 235, .10), transparent 65%),
    radial-gradient(700px 380px at 6% 12%, rgba(245, 158, 11, .10), transparent 60%),
    linear-gradient(180deg, #f2f7ff 0%, #ffffff 72%);
  border-bottom: 1px solid var(--line-2);
}
.hero-inner {
  max-width: var(--wrap); margin: 0 auto; padding: 68px 24px 76px;
  display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: 44px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px 6px 8px; border-radius: 999px;
  background: #fff; border: 1px solid #dbe7f8; box-shadow: var(--shadow-sm);
  font-size: 12.5px; color: var(--muted); margin-bottom: 20px;
}
.hero-badge i {
  font-style: normal; font-size: 11px; font-weight: 700; color: #8a5a00;
  background: var(--accent-soft); border-radius: 999px; padding: 2px 8px;
}
.hero h1 {
  font-size: clamp(30px, 4.1vw, 52px); font-weight: 800; letter-spacing: -.035em;
  line-height: 1.16; margin-bottom: 18px;
}
.hero h1 em { font-style: normal; color: var(--brand); position: relative; white-space: nowrap; }
.hero h1 em::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 4px; height: 10px;
  background: linear-gradient(90deg, rgba(245, 158, 11, .38), rgba(245, 158, 11, 0));
  z-index: -1; border-radius: 3px;
}
.hero-sub { font-size: 16.5px; color: var(--muted); max-width: 600px; line-height: 1.75; }
.hero-sub b { color: var(--ink-2); font-weight: 600; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 20px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; color: var(--muted); }
.hero-tags span { display: inline-flex; align-items: center; gap: 6px; }
.hero-tags span::before {
  content: "✓"; color: var(--ok); font-weight: 700; font-size: 12px;
}
.hero-visual { position: relative; }
.hero-visual .shot {
  display: block; width: 100%; border-radius: 18px; border: 1px solid #dfe9f7;
  box-shadow: 0 30px 70px rgba(16, 41, 84, .16); background: #f2f7ff;
}
.hero-visual .float {
  position: absolute; left: -22px; bottom: 26px;
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 12px 15px; box-shadow: var(--shadow); display: flex; gap: 10px; align-items: center;
  max-width: 250px;
}
.hero-visual .float b { display: block; font-size: 13px; }
.hero-visual .float span { display: block; font-size: 11.5px; color: var(--muted); line-height: 1.45; }
.float-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px rgba(22, 163, 74, .14); flex: none; }

/* 客户/场景条 */
.hero-strip { border-top: 1px solid var(--line-2); background: #fff; }
.hero-strip-inner {
  max-width: var(--wrap); margin: 0 auto; padding: 18px 24px;
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  font-size: 13px; color: var(--muted);
}
.hero-strip b { color: var(--ink-2); font-weight: 600; }
.hero-strip ul { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-strip li {
  padding: 4px 11px; border-radius: 999px; background: var(--bg);
  border: 1px solid var(--line); font-size: 12.5px;
}

/* ---------- 痛点 / 断裂链 ---------- */
.split { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 44px; align-items: start; }
.pain-list { display: grid; gap: 12px; }
.pain {
  display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 14px;
  padding: 16px 18px; background: #fff; border: 1px solid var(--line); border-radius: 12px;
}
.pain i {
  font-style: normal; width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  background: #fef2f2; color: #dc2626; font-weight: 700; font-size: 13px;
}
.pain b { display: block; font-size: 14.5px; margin-bottom: 2px; }
.pain span { font-size: 13px; color: var(--muted); }
.flow { display: grid; gap: 8px; }
.flow-step {
  display: grid; grid-template-columns: 78px minmax(0, 1fr) auto; align-items: center; gap: 14px;
  padding: 13px 16px; border-radius: 11px; background: #fff; border: 1px solid var(--line);
}
.flow-step b { font-size: 13.5px; }
.flow-step span { font-size: 12.5px; color: var(--muted); }
.flow-step em {
  font-style: normal; font-size: 11.5px; font-weight: 600; color: var(--brand);
  background: var(--brand-soft); padding: 3px 9px; border-radius: 999px; white-space: nowrap;
}
.flow-step--end em { color: #15803d; background: #ecfdf3; }

/* ---------- 业务域卡片 ---------- */
.domain {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden;
  transition: box-shadow .2s, transform .2s;
}
.domain:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.domain-img { width: 100%; height: 132px; object-fit: cover; display: block; background: #eef4ff; }
.domain-body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.domain-body h3 { font-size: 16.5px; display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.domain-body h3 i { font-style: normal; font-size: 11.5px; font-weight: 600; color: var(--brand); background: var(--brand-soft); padding: 2px 8px; border-radius: 999px; }
.domain-body p { font-size: 13px; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.chips span {
  font-size: 11.5px; color: var(--ink-2); background: var(--bg);
  border: 1px solid var(--line-2); border-radius: 6px; padding: 2px 7px;
}

/* ---------- 联动 / 步骤 ---------- */
.link-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.link-item {
  padding: 16px 18px; border-radius: 12px; background: #fff; border: 1px solid var(--line);
  display: flex; gap: 11px; align-items: flex-start;
}
.link-item i {
  flex: none; width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center;
  background: var(--accent-soft); color: #b45309; font-size: 11px; font-weight: 700; font-style: normal;
}
.link-item b { display: block; font-size: 13.5px; font-weight: 600; }
.link-item span { display: block; font-size: 12px; color: var(--muted); line-height: 1.5; }

.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; counter-reset: s; }
.step { position: relative; padding: 0 22px 0 0; }
.step::before {
  counter-increment: s; content: "0" counter(s);
  display: inline-grid; place-items: center;
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: 14px;
  background: var(--brand-soft); color: var(--brand); font-weight: 750; font-size: 15px;
}
.step:not(:last-child)::after {
  content: ""; position: absolute; top: 22px; left: 54px; right: 8px; height: 1px;
  background: repeating-linear-gradient(90deg, #c9d8ee 0 6px, transparent 6px 12px);
}
.step b { display: block; font-size: 15px; margin-bottom: 5px; }
.step span { font-size: 13px; color: var(--muted); }

/* ---------- 表格 ---------- */
.table-wrap {
  border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: #fff;
  box-shadow: var(--shadow-sm);
}
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td { padding: 13px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line-2); }
table.data thead th {
  background: #f7faff; font-size: 12.5px; font-weight: 600; color: var(--muted);
  letter-spacing: .04em; white-space: nowrap; position: sticky; top: 68px; z-index: 2;
}
table.data tbody tr:hover { background: #fbfdff; }
table.data tbody tr:last-child td { border-bottom: 0; }
table.data td b { font-weight: 600; }
.tag { display: inline-block; font-size: 11.5px; padding: 2px 8px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); }
.tag--accent { background: var(--accent-soft); color: #b45309; }
.tag--ok { background: #ecfdf3; color: #15803d; }
.tag--muted { background: #f1f5fa; color: var(--muted); }
.mono { font-variant-numeric: tabular-nums; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 10px; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 0 20px;
}
.faq summary {
  cursor: pointer; list-style: none; padding: 17px 0; font-size: 15px; font-weight: 600;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-size: 20px; font-weight: 400; color: var(--brand); line-height: 1; flex: none;
}
.faq details[open] summary::after { content: "–"; }
.faq .faq-body { padding: 0 0 18px; font-size: 14px; color: var(--muted); }
.faq .faq-body p + p { margin-top: 8px; }

/* ---------- 下载中心 ---------- */
.dl-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.dl-card {
  display: flex; flex-direction: column; gap: 6px; padding: 22px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r);
  box-shadow: var(--shadow-sm); transition: box-shadow .2s, transform .2s;
}
.dl-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.dl-top { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.dl-type {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  font-size: 11px; font-weight: 750; letter-spacing: .02em; flex: none;
}
.dl-type--xls { background: #e9f7ef; color: #15803d; }
.dl-type--ppt { background: #fff1e8; color: #c2410c; }
.dl-type--doc { background: #eaf1ff; color: #1d4ed8; }
.dl-top b { font-size: 15px; }
.dl-top span { display: block; font-size: 12px; color: var(--muted-2); }
.dl-card p { font-size: 13px; color: var(--muted); }
.dl-file {
  font-size: 12px; color: var(--muted-2); background: var(--bg); border-radius: 7px;
  padding: 6px 9px; margin: 8px 0 12px; word-break: break-all;
}
.dl-card .btn { margin-top: auto; width: 100%; }
.dl-note { font-size: 12.5px; color: var(--muted-2); margin-top: 18px; }

/* ---------- 关于 / 联系 ---------- */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 40px; }
.contact-card {
  background: linear-gradient(165deg, #12315e, #0b1b33);
  color: #e8eefb; border-radius: var(--r-lg); padding: 30px;
}
.contact-card h3 { color: #fff; font-size: 20px; margin-bottom: 8px; }
.contact-card p { color: #a9bad3; font-size: 13.5px; }
.contact-card .qr {
  display: flex; gap: 16px; align-items: center; margin-top: 22px;
  padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .12);
}
.contact-card .qr img { width: 104px; height: 104px; border-radius: 10px; background: #fff; padding: 5px; }
.contact-card .qr b { display: block; font-size: 14px; color: #fff; }
.contact-card .qr a { color: #ffd479; font-size: 19px; font-weight: 700; font-variant-numeric: tabular-nums; }
.contact-card .qr span { display: block; font-size: 12px; color: #a9bad3; }
.contact-list { display: grid; gap: 14px; margin-top: 24px; }
.contact-list div { display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 10px; font-size: 13.5px; }
.contact-list dt { color: #8fa4c2; }
.contact-list dd { margin: 0; color: #e8eefb; }

.stat-bars { display: grid; gap: 18px; margin-top: 24px; }
.stat-bar b { display: flex; justify-content: space-between; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.stat-bar i { display: block; height: 8px; border-radius: 999px; background: #eaf0fa; overflow: hidden; }
.stat-bar i::after { content: ""; display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, #3b82f6, #1d4ed8); width: var(--w, 60%); }

/* 内页头部 */
.page-head {
  background:
    radial-gradient(800px 320px at 82% -20%, rgba(37, 99, 235, .12), transparent 60%),
    linear-gradient(180deg, #f3f8ff, #ffffff);
  border-bottom: 1px solid var(--line-2);
  padding: 54px 0 46px;
}
.crumb { font-size: 12.5px; color: var(--muted-2); margin-bottom: 14px; display: flex; gap: 8px; flex-wrap: wrap; }
.crumb a { color: var(--muted-2); }
.crumb a:hover { color: var(--brand); }
.page-head h1 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 780; letter-spacing: -.03em; margin-bottom: 12px; }
.page-head .lead { font-size: 15.5px; }

/* CTA 横幅 */
.cta-band {
  background:
    radial-gradient(700px 260px at 12% 0%, rgba(59, 130, 246, .25), transparent 60%),
    radial-gradient(600px 240px at 88% 100%, rgba(245, 158, 11, .18), transparent 60%),
    #0b1b33;
  color: #fff; border-radius: var(--r-lg); padding: 40px 44px;
  display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(21px, 2.6vw, 30px); color: #fff; letter-spacing: -.02em; }
.cta-band p { color: #a9bad3; font-size: 14.5px; margin-top: 7px; max-width: 640px; }
.cta-band .cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 页脚（对齐 zhubao.zerocod.cn 布局） ---------- */
.site-footer {
  position: relative; margin-top: 0; padding: 0 0 20px;
  background: linear-gradient(180deg, #0e1e35 0%, #060d18 100%);
  color: #cfdcee; overflow: hidden;
}
.footer-top-line {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(245, 158, 11, .35) 20%, rgba(245, 158, 11, .6) 50%, rgba(245, 158, 11, .35) 80%, transparent 100%);
}
.footer-shell { position: relative; max-width: 1020px; margin: 0 auto; padding: 38px 24px 22px; }
.footer-main {
  display: grid; grid-template-columns: minmax(190px, 236px) minmax(0, 1fr) auto;
  gap: 26px 40px; align-items: start;
}
.footer-brand-col { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.footer-logo-link { display: block; line-height: 0; }
.footer-logo { display: block; width: auto; height: 40px; max-width: 200px; }
.footer-slogan { font-size: 12.5px; color: #93a6c1; line-height: 1.6; max-width: 230px; }
.footer-cta {
  display: inline-flex; align-items: center; margin-top: 2px; padding: 8px 16px;
  border-radius: 999px; font-size: 12.5px; font-weight: 600; color: #201400;
  background: linear-gradient(135deg, #ffc247, #f59e0b);
  box-shadow: 0 4px 14px rgba(245, 158, 11, .22);
}
.footer-cta:hover { color: #201400; filter: brightness(1.06); }
.footer-nav-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px 26px; }
.footer-col h4 {
  font-size: 12px; letter-spacing: .1em; color: #ffc247; margin: 0 0 10px; font-weight: 600;
}
.footer-col-list { display: grid; gap: 1px; }
.footer-col-list a {
  display: block; font-size: 12.5px; color: #9db0ca; padding: 4px 0; line-height: 1.45;
}
.footer-col-list a:hover { color: #ffe0a3; }
.footer-qr-col { align-self: center; justify-self: end; }
.footer-qr {
  display: flex; flex-direction: column; align-items: flex-start; gap: 6px; margin: 0;
}
.footer-qr img {
  width: 76px; height: 76px; border-radius: 8px; background: #fff; padding: 4px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, .3); display: block;
}
.footer-qr figcaption { font-size: 11.5px; color: #93a6c1; line-height: 1.4; }
.footer-qr figcaption strong { display: block; color: #ffd479; font-size: 11.5px; font-weight: 600; }

.footer-trust-bar {
  max-width: 900px; margin: 0 auto; padding: 18px 24px 12px;
  border-top: 1px solid rgba(255, 255, 255, .07); text-align: center;
}
.footer-trust-line, .footer-trust-badges, .footer-trust-meta { max-width: 860px; margin-inline: auto; }
.footer-trust-line { font-size: 12.5px; color: #9db0ca; line-height: 1.6; margin: 0 auto 10px; }
.footer-trust-line strong { color: #ffc247; font-weight: 600; }
.footer-trust-sep { margin: 0 5px; opacity: .35; }
.footer-trust-badges {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 0 auto 10px;
}
.footer-trust-badges li {
  font-size: 11.5px; color: #ffca5c; background: rgba(245, 158, 11, .08);
  border: 1px solid rgba(245, 158, 11, .2); padding: 3px 10px; border-radius: 999px; white-space: nowrap;
}
.footer-trust-meta { font-size: 12.5px; color: #93a6c1; line-height: 1.7; margin: 0 auto; }
.footer-trust-meta a { color: #9db0ca; }
.footer-trust-meta a:hover { color: #ffe0a3; }
.footer-bottom {
  max-width: 1020px; margin: 0 auto; padding: 14px 24px 4px; text-align: center;
}
.footer-copyright { font-size: 12px; color: #7d90ab; line-height: 1.6; }
.footer-copyright a { color: #a9bcd6; }
.footer-copyright a:hover { color: #ffd479; }

/* 移动端快捷联系条 */
.mobile-contact-bar {
  display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
  background: #fff; border-top: 1px solid var(--line);
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  box-shadow: 0 -6px 20px rgba(13, 32, 61, .08);
}
.mobile-contact-bar-btn {
  flex: 1; display: inline-flex; flex-direction: column; align-items: center; gap: 2px;
  font-size: 11.5px; color: var(--ink-2); padding: 4px 0;
}
.mobile-contact-bar-btn--cta { color: var(--brand); font-weight: 600; }

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .footer-main { grid-template-columns: minmax(0, 1fr) auto; }
  .footer-nav-grid { grid-column: 1 / -1; grid-row: 2; }
  .footer-brand-col { grid-column: 1; }
  .footer-qr-col { grid-column: 2; }
}
@media (max-width: 980px) {
  .nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .head-actions .btn-ghost { display: none; }
  .hero-inner { grid-template-columns: 1fr; gap: 34px; padding: 44px 24px 54px; }
  .hero-visual { order: -1; }
  .hero-visual .float { display: none; }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .about-grid { grid-template-columns: 1fr; }
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .link-grid, .dl-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }
  .step::after { display: none; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .mobile-contact-bar { display: flex; }
  body { padding-bottom: 62px; }
  .site-footer { padding-bottom: 62px; }
  .section { padding: 60px 0; }
}
@media (max-width: 720px) {
  .head-inner { height: 62px; gap: 12px; }
  .logo-txt span { display: none; }
  .head-actions .btn { display: none; }
  .head-actions .btn-primary { display: inline-flex; padding: 9px 13px; font-size: 13px; }
  .g2, .g3, .g4, .link-grid, .dl-grid { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .sec-head-row { flex-direction: column; align-items: flex-start; }
  .cta-band { padding: 28px 24px; border-radius: 18px; }
  .footer-shell { padding: 30px 20px 18px; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-qr-col { justify-self: start; }
  .footer-nav-grid { grid-template-columns: 1fr 1fr; }
  .footer-trust-bar, .footer-bottom { padding-left: 20px; padding-right: 20px; }
  .table-wrap { border-radius: 12px; }
  table.data { font-size: 13px; }
  table.data th, table.data td { padding: 10px 12px; }
  table.data thead th { position: static; }
  .steps { grid-template-columns: 1fr; }
  .hero h1 { letter-spacing: -.02em; }
}

/* 移动端抽屉 */
.drawer {
  position: fixed; inset: 0; z-index: 200; display: none;
}
.drawer.is-open { display: block; }
.drawer-mask { position: absolute; inset: 0; background: rgba(6, 13, 24, .55); }
.drawer-panel {
  position: absolute; right: 0; top: 0; bottom: 0; width: min(86vw, 340px);
  background: #fff; padding: 18px 20px 30px; overflow-y: auto;
  box-shadow: -18px 0 50px rgba(6, 13, 24, .25);
}
.drawer-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.drawer-close {
  width: 36px; height: 36px; border-radius: 9px; border: 1px solid var(--line);
  background: #fff; color: var(--ink-2); font-size: 18px; cursor: pointer;
}
.drawer-group { border-bottom: 1px solid var(--line-2); }
.drawer-group > button {
  width: 100%; background: none; border: 0; display: flex; align-items: center; justify-content: space-between;
  padding: 13px 0; font-size: 15px; font-weight: 600; color: var(--ink); cursor: pointer;
}
.drawer-group > button i { font-style: normal; color: var(--muted-2); font-size: 12px; }
.drawer-sub { display: none; padding: 0 0 10px 4px; }
.drawer-group.is-open .drawer-sub { display: block; }
.drawer-sub a { display: block; padding: 7px 0; font-size: 13.5px; color: var(--muted); }
.drawer-cta { display: grid; gap: 10px; margin-top: 20px; }

/* 细节增强 */
.hr-soft { height: 1px; background: var(--line-2); border: 0; margin: 0; }
.badge-soft {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--brand);
  background: var(--brand-soft); border: 1px solid #dde9fb; padding: 3px 10px; border-radius: 999px;
}
.quote {
  border-left: 3px solid var(--accent); background: #fffdf7; padding: 16px 18px; border-radius: 0 12px 12px 0;
  font-size: 13.5px; color: var(--ink-2);
}
.kv { display: grid; grid-template-columns: 118px minmax(0, 1fr); gap: 8px 14px; font-size: 13.5px; }
.kv dt { color: var(--muted-2); }
.kv dd { margin: 0; color: var(--ink-2); }