/* ===== MagiSpeed Corporate Site — Theme Tokens =====
 * 4 sets of themes — switch via <html data-theme="white|editorial|minimal|dark">
 * URL: ?theme=white | editorial | minimal | dark    (persisted in localStorage)
 * Default = white  (corporate white, McKinsey/BCG vibe)
 */

:root,
:root[data-theme="white"] {
  /* === A · Corporate White (default) === */
  --bg: #fdfcfa;
  --bg-alt: #f3f1ec;
  --surface: #ffffff;
  --surface-2: #fafaf7;
  --ink: #0f1d36;
  --ink-soft: #3b4a66;
  --ink-mute: #7c8699;
  --brand: #1a2540;
  --brand-soft: #2b3a5c;
  --accent: #d97706;
  --accent-soft: #f59e0b;
  --line: #e6e3db;
  --line-strong: #cbc7be;
  --shadow-sm: 0 1px 2px rgba(15,29,54,0.04), 0 1px 4px rgba(15,29,54,0.04);
  --shadow-md: 0 4px 12px rgba(15,29,54,0.06), 0 2px 6px rgba(15,29,54,0.04);
  --shadow-lg: 0 12px 32px rgba(15,29,54,0.08), 0 4px 12px rgba(15,29,54,0.05);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --primary-on-brand: #ffffff;
  --invert-bg: #ffffff;
}

:root[data-theme="editorial"] {
  /* === B · Editorial Cream (Stripe / Linear) === */
  --bg: #f7f5ef;
  --bg-alt: #efebe1;
  --surface: #ffffff;
  --surface-2: #faf8f3;
  --ink: #1f2622;
  --ink-soft: #4a5550;
  --ink-mute: #7d8682;
  --brand: #0e3a2c;
  --brand-soft: #1e5a45;
  --accent: #a8412a;
  --accent-soft: #c75a40;
  --line: #e3ddce;
  --line-strong: #c9c1ad;
  --shadow-sm: 0 1px 2px rgba(31,38,34,0.04), 0 1px 4px rgba(31,38,34,0.04);
  --shadow-md: 0 4px 12px rgba(31,38,34,0.06), 0 2px 6px rgba(31,38,34,0.04);
  --shadow-lg: 0 12px 32px rgba(31,38,34,0.08), 0 4px 12px rgba(31,38,34,0.05);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --primary-on-brand: #ffffff;
  --invert-bg: #ffffff;
}

:root[data-theme="minimal"] {
  /* === C · Minimal Mono (Vercel / Anthropic Console) === */
  --bg: #ffffff;
  --bg-alt: #f5f5f4;
  --surface: #ffffff;
  --surface-2: #fafaf9;
  --ink: #1f1f1f;
  --ink-soft: #525252;
  --ink-mute: #909090;
  /* 用蓝色作为按钮主色，避免纯黑黑底视觉太重 */
  --brand: #2563eb;
  --brand-soft: #1d4ed8;
  --accent: #1f1f1f;
  --accent-soft: #404040;
  --line: #ececec;
  --line-strong: #d4d4d4;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --primary-on-brand: #ffffff;
  --invert-bg: #ffffff;
}

:root[data-theme="dark"] {
  /* === D · Dark Tech (legacy) === */
  --bg: #0a0e1a;
  --bg-alt: #111526;
  --surface: rgba(255,255,255,0.03);
  --surface-2: rgba(255,255,255,0.05);
  --ink: #e8ecf3;
  --ink-soft: #b0b9c9;
  --ink-mute: #7a8597;
  --brand: #4f8cff;
  --brand-soft: #6ba3ff;
  --accent: #00d4ff;
  --accent-soft: #38e3ff;
  --line: rgba(255,255,255,0.08);
  --line-strong: rgba(255,255,255,0.18);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --primary-on-brand: #ffffff;
  --invert-bg: #0a0e1a;
}

/* dark theme: 完全恢复线上原视觉 */
:root[data-theme="dark"] .nav {
  background: rgba(10,14,26,0.65);
  border-bottom-color: rgba(255,255,255,0.06);
}
:root[data-theme="dark"] body {
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1a2247 0%, #0a0e1a 55%);
}
:root[data-theme="dark"] .hero {
  border-bottom-color: rgba(255,255,255,0.06);
}
:root[data-theme="dark"] .section {
  border-bottom-color: rgba(255,255,255,0.06);
}
:root[data-theme="dark"] .title .grad {
  background: linear-gradient(135deg, #4f8cff 0%, #00d4ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
:root[data-theme="dark"] .badge {
  background: rgba(79,140,255,0.08);
  border: 1px solid rgba(79,140,255,0.25);
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--accent);
}
:root[data-theme="dark"] .card-icon {
  background: linear-gradient(135deg, rgba(79,140,255,0.15), rgba(0,212,255,0.15));
  color: var(--accent);
}
:root[data-theme="dark"] .card { backdrop-filter: blur(8px); }
:root[data-theme="dark"] .stats { background: rgba(255,255,255,0.02); backdrop-filter: blur(8px); }
:root[data-theme="dark"] .contact-form { background: rgba(255,255,255,0.02); backdrop-filter: blur(8px); }
:root[data-theme="dark"] .field input,
:root[data-theme="dark"] .field select,
:root[data-theme="dark"] .field textarea,
:root[data-theme="dark"] .kv-row input,
:root[data-theme="dark"] .kv-row textarea {
  background: rgba(255,255,255,0.04);
  border-color: var(--line);
  color: var(--ink);
}
:root[data-theme="dark"] .field input:focus,
:root[data-theme="dark"] .field select:focus,
:root[data-theme="dark"] .field textarea:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.06);
}
:root[data-theme="dark"] .why-item,
:root[data-theme="dark"] .career-card { background: rgba(255,255,255,0.03); backdrop-filter: blur(8px); }
:root[data-theme="dark"] .cta-banner {
  background: linear-gradient(135deg, var(--brand) 0%, #2b54a8 100%);
  border: 1px solid rgba(255,255,255,0.1);
}
:root[data-theme="dark"] .cta-banner .btn-primary {
  background: #fff !important;
  color: var(--brand) !important;
  border-color: #fff !important;
}
:root[data-theme="dark"] footer { border-top-color: rgba(255,255,255,0.06); background: transparent; }
:root[data-theme="dark"] .foot-bottom { border-top-color: rgba(255,255,255,0.06); }

.foot-bottom { border-top-color: rgba(255,255,255,0.06); }
:root[data-theme="dark"] .career-badge.fulltime {
  background: linear-gradient(135deg, rgba(79,140,255,0.25), rgba(0,212,255,0.25));
  color: var(--accent);
  border: 1px solid rgba(0,212,255,0.4);
}
:root[data-theme="dark"] .career-badge.intern {
  background: rgba(255,255,255,0.04);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
:root[data-theme="dark"] .career-tag {
  background: rgba(255,255,255,0.04);
  color: var(--ink-soft);
  border-color: var(--line);
}
:root[data-theme="dark"] .career-headcount .hc-value {
  background: rgba(0,212,255,0.10);
  color: var(--accent);
  border-color: rgba(0,212,255,0.25);
}
:root[data-theme="dark"] .lang-switch {
  background: rgba(255,255,255,0.04);
  border-color: var(--line);
}
:root[data-theme="dark"] .lang-switch .lang-btn.active {
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #fff;
}
:root[data-theme="dark"] .btn-ghost {
  border-color: rgba(255,255,255,0.18);
  color: var(--ink);
}
:root[data-theme="dark"] .btn-ghost:hover {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.3);
  color: var(--ink);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Inter", "PingFang SC", "PingFang TC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* container */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 28px;
}

/* === Navigation === */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(253, 252, 250, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.2px;
  color: var(--ink);
  text-decoration: none;
}
.logo span {
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.15s;
}
.logo.brand-ready span { opacity: 1; }
:lang(zh-CN) .logo span,
:lang(zh-TW) .logo span,
html[lang="zh-CN"] .logo span,
html[lang="zh-TW"] .logo span {
  font-size: 16px;
  letter-spacing: 0.4px;
}
.logo-img {
  width: 34px;
  height: 34px;
  object-fit: contain;
  display: block;
}
.foot-col .logo .logo-img { width: 30px; height: 30px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--ink); }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  font-family: inherit;
  line-height: 1;
}
.btn-primary {
  background: var(--brand);
  color: var(--primary-on-brand, #fff) !important;
  border-color: var(--brand);
  font-weight: 600;
}
.btn-primary:hover {
  background: var(--brand-soft);
  border-color: var(--brand-soft);
  color: var(--primary-on-brand, #fff) !important;
}
/* nav 右上角迷你 CTA — 强制视觉权重 */
.nav .btn-primary {
  font-weight: 600;
  letter-spacing: 0.02em;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover {
  background: var(--surface);
  border-color: var(--ink);
  color: var(--ink);
}

/* === Language switch === */
.lang-switch {
  display: inline-flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
.lang-switch .lang-btn {
  border: none;
  background: transparent;
  color: var(--ink-mute);
  padding: 5px 13px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.lang-switch .lang-btn:hover { color: var(--ink); }
.lang-switch .lang-btn.active {
  color: #fff;
  background: var(--ink);
}

/* === Hero (centered, like the original dark layout) === */
.hero {
  padding: 110px 0 84px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}
.hero .container { max-width: 1080px; }
.eyebrow,
.section-eyebrow,
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  background: transparent;
  border: none;
  padding: 0;
  margin-bottom: 22px;
}
.badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
h1.title {
  font-size: clamp(34px, 5.4vw, 60px);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 auto 22px;
  max-width: 900px;
}
.title .grad {
  /* "渐变" 不再渐变，仅作语义占位 */
  color: var(--brand);
}
.subtitle {
  max-width: 680px;
  color: var(--ink-soft);
  font-size: 18px;
  margin: 0 auto 36px;
  line-height: 1.65;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* trust */
.trust {
  margin-top: 72px;
  text-align: center;
}
.trust-label {
  color: var(--ink-mute);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 18px;
  font-weight: 600;
}
.trust-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: center;
  justify-content: center;
}
.trust-logos span {
  font-weight: 600;
  font-size: 15px;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
}

/* === Section (centered headers like dark layout) === */
.section { padding: 96px 0; border-bottom: 1px solid var(--line); }
.section:last-of-type { border-bottom: none; }
.section-head {
  text-align: center;
  margin: 0 auto 56px;
  max-width: 720px;
}
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.section-title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--ink);
}
.section-sub {
  color: var(--ink-soft);
  font-size: 16px;
  margin: 0;
  line-height: 1.6;
}

/* === Cards (business) === */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--bg-alt);
  color: var(--brand);
  display: grid;
  place-items: center;
  margin-bottom: 22px;
}
.card-icon svg { width: 22px; height: 22px; }
.card h3 {
  font-size: 20px;
  margin: 0 0 8px;
  font-weight: 700;
  color: var(--ink);
}
.card .tagline {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 20px;
  line-height: 1.6;
}
.card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}
.card ul li {
  padding-left: 20px;
  position: relative;
  font-size: 14px;
  margin-bottom: 10px;
  color: var(--ink);
  line-height: 1.55;
}
.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.card a.more {
  color: var(--brand);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color 0.15s;
}
.card a.more:hover { border-bottom-color: var(--brand); }

/* === Why us grid === */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.why-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px;
}
.why-item .num {
  display: inline-block;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}
.why-item h4 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}
.why-item p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.6;
}

/* === Stats === */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat {
  padding: 36px 24px;
  text-align: center;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: none; }
.stat .v {
  font-size: 38px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat .l {
  color: var(--ink-mute);
  font-size: 13px;
  margin-top: 8px;
  letter-spacing: 0.02em;
}

/* === CTA banner === */
.cta-banner {
  margin: 0 auto;
  max-width: 1080px;
  background: var(--brand);
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  color: #fff;
  text-align: center;
}
.cta-banner h2 {
  font-size: clamp(24px, 3vw, 32px);
  margin: 0 0 10px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}
.cta-banner p {
  color: rgba(255, 255, 255, 0.78);
  margin: 0 0 24px;
  font-size: 16px;
}
.cta-banner .btn-primary {
  background: #fff !important;
  color: var(--brand) !important;
  border-color: #fff !important;
  font-weight: 700;
}
.cta-banner .btn-primary:hover {
  background: var(--bg) !important;
  color: var(--brand) !important;
  border-color: var(--bg) !important;
}

/* === Contact === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}
.contact-info { padding-top: 4px; }
.contact-info p {
  color: var(--ink-soft);
  font-size: 15px;
  margin: 6px 0 0;
  line-height: 1.6;
}
.contact-info .label {
  color: var(--ink);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 26px;
  margin-bottom: 6px;
}
.contact-info .label:first-child { margin-top: 0; }
.contact-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.field { margin-bottom: 16px; }
.field label {
  display: block;
  color: var(--ink-soft);
  font-size: 13px;
  margin-bottom: 6px;
  font-weight: 500;
}
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  color: var(--ink);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--brand);
  background: var(--surface);
}
.field textarea { min-height: 110px; resize: vertical; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* === Footer === */
footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 28px;
  background: var(--bg);
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.foot-col h5 {
  font-size: 12px;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0 0 14px;
  font-weight: 700;
}
.foot-col a {
  display: block;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 10px;
  transition: color 0.15s;
}
.foot-col a:hover { color: var(--brand); }
.foot-bottom {
  display: flex;
  /* 原来是 space-between（给左右两端用的），但一直只有版权信息一个子元素，等于没生效。
     备案栏挪进来之后 space-between 会把它推到最右端、跟版权信息分居两侧 ——
     要的是「版权 | 备案号」连排一行，所以改成靠左。 */
  justify-content: flex-start;
  align-items: baseline;
  border-top: 1px solid var(--line);
  padding-top: 24px;
  color: var(--ink-mute);
  font-size: 13px;
  flex-wrap: wrap;
  /* 行间距 6px 用于窄屏换行；列间距 12px 是竖线分隔符左侧的留白，
     右侧留白由 .beian-bar::before 的 margin-right 给，两边对称。 */
  gap: 6px 12px;
}

/* === Responsive === */
@media (max-width: 768px) {
  .nav-links { gap: 12px; }
  .nav-links > a:not(.btn-primary) { display: none; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .row-2 { grid-template-columns: 1fr; }
  .stat { border-right: none; border-bottom: 1px solid var(--line); }
  .stat:last-child { border-bottom: none; }
  .cta-banner { padding: 40px 28px; }
  .lang-switch { padding: 2px; }
  .lang-switch .lang-btn { padding: 4px 9px; font-size: 11px; }
  html[lang="zh-CN"] .logo span,
  html[lang="zh-TW"] .logo span { font-size: 14px; letter-spacing: 0.2px; }
}

/* Reveal on scroll - subtle fade only */
.reveal { opacity: 0; transition: opacity 0.6s ease; }
.reveal.visible { opacity: 1; }

/* === Admin (kept dark-on-light, calmer) === */
.admin-wrap {
  max-width: 920px;
  margin: 56px auto;
  padding: 0 24px;
}
.admin-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.admin-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.admin-tabs button {
  background: transparent;
  border: none;
  color: var(--ink-mute);
  padding: 10px 16px;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  border-bottom: 2px solid transparent;
}
.admin-tabs button.active {
  color: var(--brand);
  border-color: var(--brand);
}
.kv-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 12px;
  margin-bottom: 12px;
  align-items: center;
}
.kv-row label { color: var(--ink-soft); font-size: 13px; }
.kv-row input, .kv-row textarea {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--ink);
  font-size: 13px;
  font-family: inherit;
  width: 100%;
}
.flash {
  padding: 12px 16px;
  background: rgba(14, 58, 44, 0.06);
  border: 1px solid rgba(14, 58, 44, 0.2);
  border-radius: var(--radius-md);
  color: var(--brand);
  margin-bottom: 16px;
  font-size: 14px;
  display: none;
}
.flash.show { display: block; }

/* === Careers === */
.careers-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
}
.career-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.career-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}
.career-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}
.career-head h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}
.career-badge {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.career-badge.fulltime {
  background: var(--brand);
  color: #fff;
}
.career-badge.intern {
  background: var(--bg-alt);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.career-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.career-tag {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 4px;
  background: var(--bg-alt);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.career-section h4 {
  margin: 0 0 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
}
.career-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.career-section ul li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.6;
}
.career-section ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.career-headcount {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  font-size: 12px;
}
.career-headcount .hc-label {
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}
.career-headcount .hc-value {
  color: var(--brand);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
}

/* === Theme Switcher (dev preview only) === */
.theme-switcher {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 100;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
  box-shadow: var(--shadow-md);
  display: flex;
  gap: 2px;
  font-size: 11px;
  font-family: inherit;
}
.theme-switcher button {
  border: none;
  background: transparent;
  color: var(--ink-soft);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: 0.02em;
  transition: all 0.15s;
}
.theme-switcher button:hover { color: var(--ink); }
.theme-switcher button.active {
  background: var(--brand);
  color: var(--primary-on-brand);
}
.theme-switcher .label {
  padding: 6px 10px;
  color: var(--ink-mute);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  align-self: center;
}

/* === Contact QR card === */
.qr-card {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.qr-card img {
  width: 140px;
  height: 140px;
  object-fit: contain;
  display: block;
  border-radius: var(--radius-sm);
}
.qr-card span {
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}
:root[data-theme="dark"] .qr-card {
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(8px);
}


/* ---------- 备案栏 ----------
   独立成一行，不并进左右分栏（space-between）的 .foot-bottom ——
   并进去会被 space-between 推到右端，跟版权信息分居两侧。
   左对齐（2026-08-25 改）：与上面那行版权信息左边缘对齐，两行读作同一块。
   此前是居中，依据是部分接入商文档里「主页底部的中央位置」这句表述；
   实际管局核查的是「首页底部标明备案号并链接工信部」，左对齐是绝大多数
   已备案站点的做法。要改回居中就把 text-align 换成 center。
   字号压到 12px：不抢版面，但必须可见、可点、可跳转。 */
.beian-bar {
  margin-top: 10px;
  padding-bottom: 4px;
  text-align: left;
  font-size: 12px;
  line-height: 1.9;
  /* 用 --ink-soft 而不是页脚其它文字那个 --ink-mute：备案号是法定必须「显著」展示的，
     --ink-mute 在浅色主题下对比度只有 3.7:1，12px 字号下偏弱。--ink-soft 约 8.9:1。 */
  color: var(--ink-soft);
}
/* 同一行形态：备案栏在 .foot-bottom 里时，跟版权信息连排，中间一条竖线分隔
   （参照多数已备案站点的页脚写法：版权 | ICP 备案号 | 公安备案号）。
   字号与行高跟随版权行，不再压到 12px —— 同一行里两种字号会显得是没对齐。
   颜色仍用 .beian-bar 自己的 --ink-soft（比版权信息的 --ink-mute 深）：
   备案号是法定必须「显著」展示的，这点比视觉统一优先。
   注意这些规则挂在 .foot-bottom 后代选择器上：万一某个页面漏了插槽，
   beian.js 会兜底注入到 </footer> 前，那时落在容器外、回到上面独立一行的样式。 */
.foot-bottom .beian-bar {
  margin-top: 0;
  padding-bottom: 0;
  font-size: inherit;
  line-height: inherit;
}
.foot-bottom .beian-bar::before {
  content: "|";
  margin-right: 12px;
  color: var(--ink-mute);
  opacity: .55;
}

.beian-bar .beian-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.beian-bar a.beian-link:hover {
  color: var(--accent);
  border-bottom-color: currentColor;
}
.beian-bar .beian-link.is-plain { cursor: default; }
.beian-bar .beian-sep { margin: 0 8px; opacity: .45; }