/* ============================================================
   智僚科技官网 · 设计系统
   品牌色取《智僚品牌视觉识别手册 v1.0》
   面向央国企客户：克制、专业、留白充足，不使用花哨动效
   ============================================================ */

:root {
  --brand:        #534AB7;
  --brand-light:  #7F77DD;
  --brand-pale:   #AFA9EC;
  --brand-deep:   #26215C;
  --brand-bg:     #F7F6FF;
  --brand-line:   #E4E2F2;
  --gold:         #C9A227;

  --ink:          #1B1B2B;
  --ink-2:        #55556A;
  --ink-3:        #8A8A9C;

  --bg:           #FFFFFF;
  --bg-soft:      #FAF9FE;

  --max:          1160px;
  --r-sm:         8px;
  --r:            14px;
  --r-lg:         20px;

  --shadow-sm:    0 1px 2px rgba(38, 33, 92, .06);
  --shadow:       0 6px 24px -8px rgba(38, 33, 92, .14);

  --font: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
          "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-deep); }

h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.3; letter-spacing: -.01em; }

p { margin: 0; }

img, svg { display: block; max-width: 100%; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部信息栏（第一行） ---------- */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--brand-line);
}
.topbar-inner {
  min-height: 46px; display: flex; align-items: center;
  gap: 16px; flex-wrap: wrap;
}
.topbar-brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.topbar-brand img { height: 24px; width: auto; }
.topbar-name { font-weight: 700; font-size: 15.5px; color: var(--ink); letter-spacing: .01em; }
.topbar-tag {
  font-size: 13.5px; color: var(--ink-3);
  padding-left: 14px; border-left: 1px solid var(--brand-line);
}
.topbar-contact {
  margin-left: auto; display: flex; align-items: center;
  gap: 22px; font-size: 13.5px;
}
.topbar-contact a { display: inline-flex; align-items: center; gap: 7px; color: var(--ink-2); white-space: nowrap; }
.topbar-contact a:hover { color: var(--brand); }
.topbar-contact svg { width: 15px; height: 15px; flex: 0 0 auto; }

/* ---------- 主导航（第二行 · 通栏） ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--brand-line);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 24px;
  min-height: 60px; display: flex; align-items: center;
  justify-content: center; gap: 8px;
}
.nav-logo { display: flex; align-items: center; flex: 0 0 auto; }
.nav-logo img { height: 34px; width: auto; }
.nav-links { display: flex; gap: 4px; flex-wrap: wrap; justify-content: center; }
.nav-links a {
  padding: 9px 16px; border-radius: var(--r-sm);
  font-size: 15px; color: var(--ink-2); font-weight: 500;
  transition: background .15s, color .15s;
}
.nav-links a:hover { background: var(--brand-bg); color: var(--brand-deep); }
.nav-links a.active { color: var(--brand); background: var(--brand-bg); }

.nav-toggle {
  display: none; margin-left: auto; width: 40px; height: 40px;
  border: 1px solid var(--brand-line); border-radius: var(--r-sm);
  background: #fff; cursor: pointer; padding: 0;
  align-items: center; justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px;
  position: relative;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; }
.section.soft { background: var(--bg-soft); }
.section.tight { padding: 64px 0; }

.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 700;
  letter-spacing: .12em; color: var(--brand);
  text-transform: uppercase; margin-bottom: 14px;
}
.sec-head { max-width: 760px; margin-bottom: 48px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head h2 { font-size: 34px; margin-bottom: 16px; }
.sec-head p { font-size: 17px; color: var(--ink-2); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: var(--r-sm);
  font-size: 15.5px; font-weight: 500; cursor: pointer;
  border: 1px solid transparent; transition: all .15s;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-deep); color: #fff; }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--brand-line); }
.btn-ghost:hover { border-color: var(--brand-pale); color: var(--brand-deep); }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(180deg, var(--brand-bg) 0%, #fff 100%);
  border-bottom: 1px solid var(--brand-line);
}
.hero::after {
  content: ""; position: absolute; right: -160px; top: -120px;
  width: 560px; height: 560px; border-radius: 50%;
  border: 1.5px solid var(--brand-line); opacity: .7; pointer-events: none;
}
.hero-inner {
  max-width: var(--max); margin: 0 auto; padding: 104px 24px 96px;
  position: relative; z-index: 1;
}
.hero h1 {
  font-size: 52px; line-height: 1.22; letter-spacing: -.02em;
  max-width: 15em; margin-bottom: 24px;
}
.hero h1 em { font-style: normal; color: var(--brand); }
.hero-sub {
  font-size: 19px; color: var(--ink-2); max-width: 640px;
  margin-bottom: 34px; line-height: 1.75;
}
.hero-note {
  margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--brand-line);
  display: flex; gap: 40px; flex-wrap: wrap;
}
.hero-note div { font-size: 14px; color: var(--ink-3); }
.hero-note b { display: block; font-size: 26px; color: var(--brand-deep); font-weight: 700; line-height: 1.3; }

/* ---------- 卡片栅格 ---------- */
.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--brand-line);
  border-radius: var(--r); padding: 28px; transition: all .18s;
}
.card:hover { border-color: var(--brand-pale); box-shadow: var(--shadow); }
.card h3 { font-size: 18.5px; margin-bottom: 10px; }
.card p { font-size: 14.8px; color: var(--ink-2); }
.card .num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: var(--r-sm);
  background: var(--brand-bg); color: var(--brand);
  font-size: 14px; font-weight: 700; margin-bottom: 14px;
}
.card .tagline {
  display: block; font-size: 13px; color: var(--brand);
  font-weight: 600; margin-top: 12px;
}

.card.plain { background: var(--bg-soft); }
.card.plain:hover { background: #fff; }

/* ---------- 三层缺口 / 价值链 ---------- */
.gap-list { display: grid; gap: 14px; }
.gap {
  display: grid; grid-template-columns: 132px 1fr 1fr;
  gap: 20px; align-items: start;
  padding: 22px 24px; border-radius: var(--r);
  background: #fff; border: 1px solid var(--brand-line);
}
.gap .name { font-weight: 700; color: var(--brand-deep); font-size: 16px; }
.gap .name small { display: block; font-weight: 400; font-size: 12.5px; color: var(--ink-3); margin-top: 3px; }
.gap .lbl { font-size: 12px; font-weight: 700; color: var(--ink-3); letter-spacing: .08em; display: block; margin-bottom: 5px; }
.gap .txt { font-size: 14.6px; color: var(--ink-2); }

/* ---------- 价值链 ---------- */
.chain { display: grid; gap: 10px; }
.chain-row {
  display: grid; grid-template-columns: 96px 1fr auto;
  gap: 22px; align-items: center;
  padding: 20px 26px; border-radius: var(--r);
  background: #fff; border: 1px solid var(--brand-line);
  border-left: 4px solid var(--brand-pale);
  transition: all .18s;
}
.chain-row:hover { border-left-color: var(--brand); box-shadow: var(--shadow); }
.chain-row .lvl {
  font-size: 12.5px; font-weight: 700; color: var(--brand);
  letter-spacing: .06em;
}
.chain-row .body h3 { font-size: 18px; margin-bottom: 5px; }
.chain-row .body p { font-size: 14.6px; color: var(--ink-2); }
.chain-row .mode {
  font-size: 13px; color: var(--ink-3); white-space: nowrap;
  padding: 6px 14px; border-radius: 999px; background: var(--brand-bg);
  color: var(--brand-deep);
}

/* ---------- 数据条 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--brand-line);
          border: 1px solid var(--brand-line); border-radius: var(--r); overflow: hidden; }
.stat { background: #fff; padding: 30px 24px; }
.stat b { display: block; font-size: 36px; color: var(--brand); font-weight: 700; line-height: 1.15; letter-spacing: -.02em; }
.stat span { display: block; font-size: 14.2px; color: var(--ink-2); margin-top: 8px; }

/* ---------- 分栏 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split h2 { font-size: 32px; margin-bottom: 18px; }
.split p { font-size: 16.5px; color: var(--ink-2); }
.split p + p { margin-top: 14px; }

/* ---------- 列表 ---------- */
ul.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
ul.ticks li {
  position: relative; padding-left: 28px;
  font-size: 15.4px; color: var(--ink-2);
}
ul.ticks li::before {
  content: ""; position: absolute; left: 4px; top: .62em;
  width: 8px; height: 8px; border-radius: 2px; background: var(--brand-pale);
}
ul.ticks li b { color: var(--ink); }

/* ---------- 提示框 ---------- */
.note {
  padding: 22px 26px; border-radius: var(--r);
  background: var(--brand-bg); border-left: 4px solid var(--brand);
  font-size: 15px; color: var(--ink-2);
}
.note b { color: var(--brand-deep); }
.note.gold { background: #FFFBF0; border-left-color: var(--gold); }
.note.gold b { color: #8A6D0B; }

/* ---------- CTA ---------- */
.cta {
  background: var(--brand-deep); color: #fff;
  border-radius: var(--r-lg); padding: 60px 56px;
  display: grid; grid-template-columns: 1.4fr auto; gap: 40px; align-items: center;
}
.cta h2 { font-size: 30px; color: #fff; margin-bottom: 12px; }
.cta p { color: #C9C5E8; font-size: 16.5px; }
.cta .btn-primary { background: #fff; color: var(--brand-deep); }
.cta .btn-primary:hover { background: var(--brand-pale); color: var(--brand-deep); }

/* ---------- 页脚 ---------- */
.footer { background: var(--brand-deep); color: #B9B5D8; padding: 60px 0 28px; font-size: 14.2px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 44px; }
.footer h4 { color: #fff; font-size: 14.5px; margin-bottom: 16px; letter-spacing: .02em; }
.footer a { color: #B9B5D8; display: block; padding: 4px 0; }
.footer a:hover { color: #fff; }
.footer .brand-desc { color: #9C97C4; font-size: 13.8px; line-height: 1.7; margin-top: 14px; max-width: 300px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); padding-top: 22px;
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  font-size: 13px; color: #8F8ABB;
}
.footer-logo { height: 32px; width: auto; }

/* ---------- 页面头（内页） ---------- */
.page-head {
  background: var(--brand-bg); border-bottom: 1px solid var(--brand-line);
  padding: 64px 0 56px;
}
.page-head h1 { font-size: 40px; margin-bottom: 14px; }
.page-head p { font-size: 17.5px; color: var(--ink-2); max-width: 720px; }

/* ---------- 服务分层（services） ---------- */
.layer {
  display: grid; grid-template-columns: 220px 1fr; gap: 40px;
  padding: 40px 0; border-bottom: 1px solid var(--brand-line);
}
.layer:last-child { border-bottom: 0; }
.layer-side h3 { font-size: 21px; margin-bottom: 8px; }
.layer-side .lvl { font-size: 12.5px; font-weight: 700; color: var(--brand); letter-spacing: .08em; display: block; margin-bottom: 10px; }
.layer-side .mode {
  display: inline-block; margin-top: 14px; padding: 6px 14px;
  border-radius: 999px; background: var(--brand-bg); color: var(--brand-deep); font-size: 13px;
}
.layer-body { display: grid; gap: 16px; }
.layer-body .row { display: grid; grid-template-columns: 84px 1fr; gap: 16px; }
.layer-body .k { font-size: 13.5px; font-weight: 700; color: var(--ink-3); padding-top: 3px; }
.layer-body .v { font-size: 15.2px; color: var(--ink-2); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.info-card { background: #fff; border: 1px solid var(--brand-line); border-radius: var(--r); padding: 26px 28px; }
.info-card h4 { font-size: 14px; color: var(--ink-3); font-weight: 600; margin-bottom: 8px; letter-spacing: .02em; }
.info-card .val { font-size: 19px; color: var(--ink); font-weight: 600; }
.info-card .val.mono { font-family: Consolas, "Cascadia Mono", monospace; letter-spacing: -.01em; }
.info-card p { font-size: 14.2px; color: var(--ink-2); margin-top: 6px; }

/* ---------- 页脚占位说明 ---------- */
.pending {
  display: inline-block; padding: 2px 9px; border-radius: 5px;
  background: #FFF8E8; color: #8A6D0B; font-size: 12.5px; font-weight: 600;
}

/* ---------- 面包屑 ---------- */
.crumbs { font-size: 13.5px; color: var(--ink-3); margin-bottom: 14px; }
.crumbs a { color: var(--ink-3); }
.crumbs a:hover { color: var(--brand); }
.crumbs span { margin: 0 7px; color: var(--brand-line); }

/* ---------- FAQ 折叠（原生 details，无 JS 依赖） ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  background: #fff; border: 1px solid var(--brand-line);
  border-radius: var(--r); padding: 0; overflow: hidden;
}
.faq details[open] { border-color: var(--brand-pale); }
.faq summary {
  cursor: pointer; padding: 18px 24px; font-size: 16.5px; font-weight: 600;
  color: var(--ink); list-style: none; display: flex; align-items: flex-start; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; margin-left: auto; color: var(--brand);
  font-size: 20px; line-height: 1.2; font-weight: 400; flex: 0 0 auto;
}
.faq details[open] summary::after { content: "–"; }
.faq summary:hover { color: var(--brand-deep); }
.faq .ans { padding: 0 24px 20px; font-size: 15.2px; color: var(--ink-2); }
.faq .ans p + p { margin-top: 10px; }
.faq .ans b { color: var(--ink); }

/* ---------- 留言表单 ---------- */
.lead-form { display: grid; gap: 16px; }
.field { display: grid; gap: 7px; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.field label .req { color: #C0392B; margin-left: 3px; }
.field input, .field select, .field textarea {
  width: 100%; font-family: inherit; font-size: 15px; color: var(--ink);
  padding: 11px 14px; border: 1px solid var(--brand-line); border-radius: var(--r-sm);
  background: #fff; transition: border-color .15s, box-shadow .15s;
}
.field textarea { min-height: 104px; resize: vertical; line-height: 1.7; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(83, 74, 183, .12);
}
.field .hint { font-size: 12.5px; color: var(--ink-3); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-foot { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.form-foot .btn { border: 0; font-family: inherit; }
.form-note { font-size: 12.8px; color: var(--ink-3); }
.form-msg { font-size: 14.5px; border-radius: var(--r-sm); padding: 12px 16px; display: none; }
.form-msg.show { display: block; }
.form-msg.ok { background: #EDF7EE; color: #1E6B32; border: 1px solid #BFE3C6; }
.form-msg.warn { background: #FFF8E8; color: #8A6D0B; border: 1px solid #F0DFAE; }
.form-msg.err { background: #FDEEEE; color: #A3271F; border: 1px solid #F3C9C6; }

/* ---------- 浮动客服 / 快捷联系 ---------- */
.contact-fab {
  position: fixed; right: 22px; bottom: 22px; z-index: 60;
  display: flex; flex-direction: column; align-items: flex-end; gap: 12px;
}
.fab-panel {
  display: none; width: 268px; background: #fff; border: 1px solid var(--brand-line);
  border-radius: var(--r); box-shadow: 0 16px 44px -14px rgba(38, 33, 92, .3);
  padding: 20px 22px;
}
.contact-fab.open .fab-panel { display: block; }
.fab-panel h4 { font-size: 15px; margin-bottom: 4px; }
.fab-panel .sub { font-size: 13px; color: var(--ink-3); margin-bottom: 14px; }
.fab-panel a {
  display: flex; align-items: center; gap: 10px; padding: 9px 0;
  font-size: 14.5px; color: var(--ink-2); border-top: 1px solid var(--brand-line);
}
.fab-panel a:first-of-type { border-top: 0; }
.fab-panel a:hover { color: var(--brand); }
.fab-panel svg { width: 16px; height: 16px; flex: 0 0 auto; }
.fab-btn {
  width: 54px; height: 54px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--brand); color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px -8px rgba(38, 33, 92, .5); transition: background .15s, transform .15s;
}
.fab-btn:hover { background: var(--brand-deep); transform: translateY(-2px); }
.fab-btn svg { width: 24px; height: 24px; }
.fab-btn .fab-close { display: none; }
.contact-fab.open .fab-btn .fab-icon { display: none; }
.contact-fab.open .fab-btn .fab-close { display: block; }

/* ---------- 无障碍：仅读屏可见 ---------- */
.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;
}
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

/* ---------- 信任条（内页通用） ---------- */
.trust-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--brand-line); border: 1px solid var(--brand-line);
  border-radius: var(--r); overflow: hidden;
}
.trust-bar > div { background: #fff; padding: 20px 22px; }
.trust-bar b { display: block; font-size: 15.5px; color: var(--brand-deep); margin-bottom: 4px; }
.trust-bar span { font-size: 13.5px; color: var(--ink-2); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero h1 { font-size: 40px; }
  .hero-inner { padding: 72px 24px 68px; }
  .sec-head h2 { font-size: 28px; }
  .g4, .g3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .gap { grid-template-columns: 1fr; gap: 12px; }
  .layer { grid-template-columns: 1fr; gap: 20px; }
  .cta { grid-template-columns: 1fr; padding: 44px 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
  .chain-row { grid-template-columns: 76px 1fr; gap: 16px; }
  .chain-row .mode { grid-column: 2; justify-self: start; }
  .trust-bar { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .topbar-tag { display: none; }
  .topbar-inner { min-height: 42px; gap: 10px; }
  .topbar-name { font-size: 14.5px; }
  .topbar-contact { gap: 14px; font-size: 13px; }
  .topbar-contact .tb-mail { display: none; }

  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-inner { justify-content: flex-end; min-height: 56px; }
  .nav.open .nav-links {
    display: flex; flex-direction: column; position: absolute;
    left: 0; right: 0; top: 100%; background: #fff;
    border-bottom: 1px solid var(--brand-line); padding: 12px 24px 20px; gap: 2px;
    justify-content: flex-start;
  }
  .nav.open .nav-links a { padding: 12px 14px; }

  .form-row { grid-template-columns: 1fr; }
  .trust-bar { grid-template-columns: 1fr; }
  .contact-fab { right: 16px; bottom: 16px; }
  .fab-panel { width: calc(100vw - 44px); max-width: 300px; }
  .faq summary { padding: 16px 18px; font-size: 15.5px; }
  .faq .ans { padding: 0 18px 18px; }

  .section { padding: 60px 0; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 17px; }
  .hero-note { gap: 26px; }
  .hero-note b { font-size: 22px; }
  .g4, .g3, .g2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat b { font-size: 28px; }
  .page-head { padding: 44px 0 40px; }
  .page-head h1 { font-size: 30px; }
  .layer-body .row { grid-template-columns: 1fr; gap: 2px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .card { padding: 22px; }
}

/* ---------- 极窄屏（≤340px，如 iPhone SE 一代）----------
   320px 下两处溢出：① .chain-row 的 nowrap 药丸被 1fr 列撑出容器；
   ② 联系页长邮箱 contact@zhiliaolab.com 无法断行。 */
@media (max-width: 340px) {
  .chain-row { grid-template-columns: 1fr; gap: 10px; }
  .chain-row .lvl, .chain-row .body, .chain-row .mode { grid-column: 1; justify-self: start; }
  .chain-row .mode { white-space: normal; }
  .info-card .val.mono { word-break: break-all; }
}

@media print {
  .nav, .cta, .footer { display: none; }
}