/* AIDA (Huizhou) · site.css — shared chrome. Uses tokens only. */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
.wrap { width: min(100% - 2 * var(--space), var(--maxw)); margin-inline: auto; }

/* ---------- type ---------- */
.h1 { font-size: clamp(34px, 4.4vw, 60px); line-height: 1.06; letter-spacing: -.035em; font-weight: 800; margin: 0; }
.h2 { font-size: clamp(24px, 2.6vw, 36px); line-height: 1.15; letter-spacing: -.025em; font-weight: 800; margin: 0; }
.h3 { font-size: clamp(17px, 1.4vw, 21px); line-height: 1.3; font-weight: 700; margin: 0; letter-spacing: -.01em; }
.lead { font-size: clamp(16px, 1.3vw, 19px); color: var(--muted); max-width: 62ch; margin: 0; }
.small { font-size: 13.5px; color: var(--muted); }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11.5px; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase; color: var(--pri-text);
}
.eyebrow::before { content: ""; width: 14px; height: 2px; background: var(--pri); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 84px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.brand-mark {
  width: 28px; height: 28px; border-radius: var(--radius-sm); display: grid; place-items: center;
  background: var(--ink); color: #fff; font-family: var(--mono); font-size: 13px; font-weight: 700;
}
.brand small { display: block; font-family: var(--mono); font-size: 9.5px; letter-spacing: .14em; color: var(--muted-2); font-weight: 600; }
.nav { display: flex; gap: 22px; margin-left: auto; font-size: 14px; font-weight: 600; }
.nav a { text-decoration: none; color: #3B4655; padding: 3px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--pri); }
.header-cta { margin-left: 4px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: var(--radius-sm); border: 1px solid transparent;
  background: var(--pri); color: var(--pri-ink); font-weight: 800; font-size: 14.5px;
  text-decoration: none; cursor: pointer; transition: background .15s, transform .15s, border-color .15s;
}
.btn:hover { background: var(--pri-dark); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--paper); }
.btn-sm { padding: 8px 14px; font-size: 13px; }

/* ---------- sections ---------- */
.section { padding-top: var(--section-y); }
.section-paper { padding-block: var(--section-y); background: var(--paper); border-block: 1px solid var(--line); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; flex-wrap: wrap; }
.section-head .lead { margin-top: 10px; }

/* ---------- hero ---------- */
.hero { padding-block: clamp(44px, 6vw, 88px) var(--section-y); background: linear-gradient(180deg, #FFFFFF 0%, #F7F9FC 100%); }
.hero-grid { display: grid; grid-template-columns: 1.06fr .94fr; gap: clamp(28px, 4vw, 56px); align-items: center; }
.hero h1 { margin: 16px 0 18px; }
.hero .lead { margin-bottom: 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-note { margin-top: 16px; font-family: var(--mono); font-size: 12px; color: var(--muted-2); letter-spacing: .04em; }

/* spec card (right side of hero) */
.spec-card {
  border: 1px solid var(--line-strong); border-radius: var(--radius); background: #fff;
  box-shadow: var(--shadow); overflow: hidden;
}
.spec-card header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--paper);
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; color: var(--muted);
}
.spec-card dl { margin: 0; display: grid; grid-template-columns: 1fr 1fr; }
.spec-card div.cell { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.spec-card div.cell:nth-child(odd) { border-right: 1px solid var(--line); }
.spec-card dt { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; color: var(--muted-2); text-transform: uppercase; }
.spec-card dd { margin: 4px 0 0; font-size: 15px; font-weight: 700; }
.spec-card dd span { font-weight: 400; color: var(--muted); font-size: 12px; }

/* ---------- process strip ---------- */
.strip { border-block: 1px solid var(--line); background: #fff; }
.strip-inner { display: flex; gap: 0; flex-wrap: wrap; }
.strip-item { flex: 1 1 180px; padding: 18px 20px; border-right: 1px solid var(--line); }
.strip-item:last-child { border-right: 0; }
.strip-item b { display: block; font-family: var(--mono); font-size: 11px; letter-spacing: .12em; color: var(--accent); }
.strip-item span { display: block; font-size: 14.5px; font-weight: 600; margin-top: 4px; }
.strip-item em { display: block; font-style: normal; font-size: 12.5px; color: var(--muted); }

/* ---------- grids & cards ---------- */
.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1000px) { .g3, .g4 { grid-template-columns: repeat(2, 1fr); } .hero-grid { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .g2, .g3, .g4 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; display: flex; flex-direction: column; gap: 8px; transition: border-color .15s, box-shadow .15s;
}
.card:hover { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.card .kicker { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: var(--pri-text); }
.card p { margin: 0; font-size: 14px; color: var(--muted); }
.card .more { margin-top: auto; font-size: 13px; font-weight: 700; color: var(--pri-text); text-decoration: none; }

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }
.step { padding: 18px 16px; border-right: 1px solid var(--line); background: #fff; }
.step:last-child { border-right: 0; }
.step b { font-family: var(--mono); font-size: 11px; color: var(--accent); letter-spacing: .1em; }
.step h3 { font-size: 15px; margin: 6px 0 4px; }
.step p { margin: 0; font-size: 12.5px; color: var(--muted); }

/* ---------- table ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 14px; background: #fff; }
.table th, .table td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); }
.table th { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted-2); font-weight: 700; background: var(--paper); }
.table td { color: #334155; }
.table td:first-child { font-weight: 600; color: var(--ink); }
.table tr:hover td { background: #FAFBFD; }

/* ---------- callout ---------- */
.callout { border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--radius-sm);
  background: #FFFDF9; padding: 16px 18px; font-size: 14px; color: #4A3B2A; }

/* ---------- cta ---------- */
.cta-band { background: var(--ink); color: #fff; border-radius: var(--radius); padding: clamp(26px, 3.4vw, 44px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; max-width: 24ch; }
.cta-band p { color: #AEB9C7; margin: 8px 0 0; }
.cta-band .btn { background: #fff; color: var(--ink); }
.cta-band .btn:hover { background: #E9EEF5; }

/* ---------- form ---------- */
.field { display: grid; gap: 6px; }
.field label { font-size: 12.5px; font-weight: 600; color: #3B4655; font-family: var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.field input, .field textarea, .field select {
  font: inherit; font-size: 15px; padding: 11px 13px; border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); background: #fff; color: var(--ink);
}
.field input:focus, .field textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: #fff; padding-block: 44px 26px; margin-top: var(--section-y); }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(4, 1fr); gap: 26px; }
@media (max-width: 1000px) { .footer-grid { grid-template-columns: 1fr 1fr 1fr; } }
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.site-footer h4 { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-2); margin: 0 0 12px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-size: 13.5px; }
.site-footer a { text-decoration: none; color: #3B4655; }
.site-footer a:hover { color: var(--pri-text); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  border-top: 1px solid var(--line); margin-top: 30px; padding-top: 16px; font-size: 12px; color: var(--muted-2); }

/* ---------- a11y / mobile ---------- */
:focus-visible { outline: 2px solid var(--pri); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
@media (max-width: 860px) {
  .nav { gap: 15px; overflow-x: auto; flex-wrap: nowrap; white-space: nowrap; padding-bottom: 2px; scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  .header-cta { display: none; }
  .strip-item { flex: 1 1 50%; border-bottom: 1px solid var(--line); }
  .spec-card dl { grid-template-columns: 1fr; }
  .spec-card div.cell:nth-child(odd) { border-right: 0; }
}

/* ---------- 中文站排版覆盖 ---------- */
body { line-height: 1.75; }
.h1 { letter-spacing: -.01em; line-height: 1.22; }
.h2 { letter-spacing: 0; line-height: 1.35; }
.h3 { letter-spacing: 0; line-height: 1.5; }
.lead { line-height: 1.85; }
.eyebrow { letter-spacing: .1em; }
.btn { letter-spacing: .02em; }
/* 中文标签不要大字距 */
.site-footer h4 { letter-spacing: .04em; text-transform: none; }
.field label { letter-spacing: .02em; text-transform: none; }
.strip-item b { letter-spacing: .06em; }
/* ---------- logo ---------- */
.brand { display: inline-flex; align-items: center; }
.brand-logo { height: 56px; width: auto; display: block; }
.site-footer .brand-logo { height: 64px; }
@media (max-width: 640px) { .brand-logo { height: 34px; } .header-inner { height: 64px; } }

/* 中文站：logo 旁边的公司名 */
.brand-name {
  font-size: 13px; font-weight: 700; color: #334155;
  margin-left: 12px; padding-left: 12px; border-left: 1px solid var(--line);
  line-height: 1.25; letter-spacing: .01em;
}
@media (max-width: 640px) { .brand-name { display: none; } }

/* ---------- 配图 ---------- */
.figure { margin: 0 0 26px; }
.figure img { width: 100%; border-radius: var(--radius); border: 1px solid var(--line); }
.figure figcaption { margin-top: 10px; font-size: 12.5px; color: var(--muted); letter-spacing: .01em; }