/* WorkHand 官网 — 视觉层
   主题: 工业蓝图 (paper / ink / blueprint / amber)
   强调色只有琥珀一个，其余全部走中性色。 */

:root {
  --paper:      #F4F5F3;
  --paper-2:    #FFFFFF;
  --ink:        #0F1720;
  --blueprint:  #132C44;
  --amber:      #E9A21B;
  --steel:      #6E7A85;
  --rule:       #D8DCDD;

  --shell:      1180px;
  --gutter:     24px;
  --measure:    62ch;

  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
          "Segoe UI", "Hiragino Sans GB", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; font-weight: 650; letter-spacing: -0.02em; line-height: 1.2; }
p { margin: 0; }
ul, ol, dl { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 2px;
}

.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: #fff; padding: 10px 16px; z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}
.btn-lg { height: 48px; padding: 0 26px; font-size: 15px; }

.btn-solid { background: var(--amber); color: #1A1206; }
.btn-solid:hover { background: #D0910F; }

.btn-outline { border-color: rgba(255,255,255,.55); color: #fff; }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.08); }

.btn-ghost { border-color: var(--rule); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); }

/* ---------- 顶栏 ---------- */

.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(244,245,243,.86);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background-color .2s ease;
}
.topbar.is-stuck { border-bottom-color: var(--rule); background: rgba(244,245,243,.97); }

.topbar-inner {
  display: flex; align-items: center; gap: 32px;
  height: 64px;
}

.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); }
.brand-mark { width: 26px; height: 26px; flex: none; }
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }

.topnav { display: flex; gap: 26px; margin-left: auto; }
.topnav a { font-size: 14.5px; color: var(--steel); font-weight: 500; }
.topnav a:hover { color: var(--ink); }

.topbar-cta { display: flex; align-items: center; gap: 10px; }

/* ---------- Hero ---------- */

.hero { padding: 92px 0 56px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: 12.5px; letter-spacing: .04em; color: var(--steel);
  text-transform: none;
  margin-bottom: 26px;
}
.eyebrow::before {
  content: ""; width: 28px; height: 2px; background: var(--amber);
}

.hero-title {
  font-size: clamp(2.1rem, 4.6vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
  max-width: 20ch;
}

.hero-lede {
  margin-top: 26px;
  max-width: var(--measure);
  font-size: 17px;
  color: #3C4854;
}

.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero-actions .btn-outline { border-color: #B9BFBF; color: var(--ink); }
.hero-actions .btn-outline:hover { border-color: var(--ink); background: rgba(15,23,32,.04); }

.figures {
  margin-top: 64px;
  padding-top: 26px;
  border-top: 1px solid var(--rule);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.figures dt {
  font-size: 34px; font-weight: 700; letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}
.figures dd { margin: 2px 0 0; font-size: 14px; color: var(--steel); }

/* ---------- 流程轨 ---------- */

.rail { padding: 8px 0 76px; }
.rail-svg { display: block; width: 100%; height: auto; }
.rail-nodes circle { fill: var(--ink); }
.rail-nodes circle.node-accent { fill: var(--amber); }
.rail-nodes text {
  fill: var(--steel);
  font-size: 13px;
  text-anchor: middle;
  font-family: var(--sans);
}

/* ---------- 通用区块 ---------- */

.section { padding: 84px 0; }

.section-head { max-width: 780px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(1.6rem, 2.6vw, 2.1rem); }
.section-head p { margin-top: 14px; max-width: var(--measure); color: var(--steel); font-size: 16px; }

/* ---------- 能力清单（规格表样式） ---------- */

.spec li {
  display: grid;
  grid-template-columns: 64px 200px 1fr;
  gap: 20px;
  align-items: baseline;
  padding: 22px 12px 22px 0;
  border-top: 1px solid var(--rule);
  transition: background-color .18s ease;
}
.spec li:last-child { border-bottom: 1px solid var(--rule); }
.spec li:hover { background: rgba(15,23,32,.028); }

.spec-index {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}
.spec h3 { font-size: 17px; font-weight: 650; }
.spec p { color: var(--steel); font-size: 15.5px; }

/* ---------- 制造场景（蓝图深底） ---------- */

.factory {
  background-color: var(--blueprint);
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 34px 34px;
  color: #fff;
}
.factory .section-head p { color: rgba(255,255,255,.72); }

.expert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.14);
}

.expert {
  background: rgba(19,44,68,.72);
  backdrop-filter: blur(2px);
  padding: 30px 30px 34px;
  transition: background-color .2s ease;
}
.expert:hover { background: rgba(19,44,68,.95); }

.expert-icon { display: block; font-size: 22px; margin-bottom: 14px; }
.expert h3 { font-size: 19px; }
.expert p { margin-top: 12px; color: rgba(255,255,255,.74); font-size: 15px; max-width: 46ch; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tags li {
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 4px 9px;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 2px;
  color: rgba(255,255,255,.82);
}

.note {
  margin-top: 20px;
  font-size: 13px;
  color: rgba(255,255,255,.5);
}

/* ---------- 上线路径 ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  padding-top: 16px;
  border-top: 2px solid var(--ink);
}
.steps li::before {
  content: "0" counter(step);
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--amber);
  margin-bottom: 10px;
}
.steps h3 { font-size: 16.5px; }
.steps p { margin-top: 10px; font-size: 14px; color: var(--steel); }

/* ---------- 路线图 ---------- */

.roadmap { background: var(--paper-2); border-top: 1px solid var(--rule); }

.timeline li {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 24px;
  align-items: baseline;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
}
.timeline li:last-child { border-bottom: 1px solid var(--rule); }

.ver {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}
.timeline h3 { font-size: 17px; }
.timeline p { margin-top: 8px; font-size: 15px; color: var(--steel); max-width: var(--measure); }

.state {
  font-size: 12.5px;
  padding: 3px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--steel);
  white-space: nowrap;
}
.state-done { border-color: var(--amber); color: #8A6207; background: rgba(233,162,27,.1); }

/* ---------- CTA ---------- */

.cta {
  background: var(--blueprint);
  color: #fff;
  padding: 88px 0;
}
.cta-inner { max-width: 760px; }
.cta h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }
.cta p { margin-top: 16px; color: rgba(255,255,255,.74); font-size: 16px; max-width: var(--measure); }
.cta-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 页脚 ---------- */

.footer { background: var(--ink); color: rgba(255,255,255,.72); padding: 52px 0 28px; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-start; }
.footer-brand .brand-name { color: #fff; font-size: 17px; font-weight: 700; }
.footer-brand p { font-size: 14px; margin-top: 4px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 22px; }
.footer-nav a { font-size: 14px; }
.footer-nav a:hover { color: #fff; }
.footer-bottom { margin-top: 34px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,.5); }

/* ---------- 响应式 ---------- */

@media (max-width: 980px) {
  .spec li { grid-template-columns: 48px 1fr; }
  .spec p { grid-column: 2; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .timeline li { grid-template-columns: 80px 1fr; }
  .state { grid-column: 2; justify-self: start; }
}

@media (max-width: 720px) {
  .topnav { display: none; }
  .topbar-cta { margin-left: auto; }
  .hero { padding: 64px 0 40px; }
  .rail { display: none; }
  .figures { grid-template-columns: repeat(2, 1fr); gap: 24px 16px; }
  .figures dt { font-size: 28px; }
  .expert-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .btn-lg { height: 46px; padding: 0 20px; }
}