/* ==========================================================================
   AnsHive — 产品介绍网站
   视觉方向：Modern minimal (Linear / Vercel 系)
   ========================================================================== */

:root {
  /* 基础令牌（方向库 modern-minimal，逐字绑定） */
  --bg:      oklch(99% 0.002 240);
  --surface: oklch(100% 0 0);
  --fg:      oklch(18% 0.012 250);
  --muted:   oklch(54% 0.012 250);
  --border:  oklch(92% 0.005 250);
  --accent:  oklch(58% 0.18 255);

  /* 派生令牌（oklch 生成，保证交互态对比度不下降） */
  --accent-ink:       oklch(48% 0.17 255);
  --accent-ink-hover: oklch(41% 0.15 255);
  --accent-weak:      oklch(96.5% 0.022 255);
  --on-accent:        oklch(100% 0 0);
  --success:          oklch(58% 0.13 158);
  --ink:              oklch(17% 0.012 250);
  --ink-soft:         oklch(24% 0.014 250);
  --on-ink:           oklch(97% 0.004 250);
  --on-ink-muted:     oklch(74% 0.012 250);
  --surface-subtle:   oklch(97.5% 0.004 250);

  /* 字体：方向库 display/body 栈 + 等宽数字栈 */
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI Variable Display', 'Segoe UI', system-ui, sans-serif;
  --font-body:    -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI Variable Text', 'Segoe UI', system-ui, sans-serif;
  --font-mono:    ui-monospace, 'SF Mono', 'Cascadia Code', 'JetBrains Mono', Consolas, 'Liberation Mono', monospace;

  --container: 1200px;
  --radius: 16px;
  --radius-sm: 10px;
  --nav-h: 66px;
  --hair: 1px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 28px;
}

.section { padding-block: 104px; }
.section--tight { padding-block: 72px; }
.section + .section { border-top: var(--hair) solid var(--border); }

.section-head { max-width: 720px; }
.section-head--center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 18px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: var(--hair);
  background: var(--muted);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.022em;
  margin: 0;
  color: var(--fg);
}

h1 { font-size: clamp(2.6rem, 5.4vw, 4.25rem); }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.75rem); }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }

.lede {
  font-size: 1.125rem;
  color: var(--muted);
  margin: 20px 0 0;
  max-width: 60ch;
}

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  border: var(--hair) solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--accent-ink);
  color: var(--on-accent);
}
.btn--primary:hover { background: var(--accent-ink-hover); }

.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--fg);
}
.btn--ghost:hover { background: var(--surface-subtle); border-color: color-mix(in oklch, var(--border) 50%, var(--fg)); }

.btn--on-ink {
  background: var(--on-ink);
  color: var(--ink);
}
.btn--on-ink:hover { background: oklch(90% 0.006 250); }

.btn--link {
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  color: var(--accent-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.btn--link:hover { color: var(--accent-ink-hover); }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

.text-link {
  color: var(--accent-ink);
  font-weight: 500;
  text-underline-offset: 3px;
}
.text-link:hover { color: var(--accent-ink-hover); text-decoration: underline; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: color-mix(in oklch, var(--bg) 78%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: var(--hair) solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand__mark { height: 26px; width: auto; }
.brand__name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav__links-wrap { display: contents; }
.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__link {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 0.94rem;
  color: var(--muted);
  transition: color .16s ease, background-color .16s ease;
}
.nav__link:hover { color: var(--fg); background: var(--surface-subtle); }
.nav__link[aria-current="page"] { color: var(--fg); font-weight: 500; }

.nav__actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: var(--hair) solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: var(--hair);
  background: var(--fg);
  position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: var(--hair);
  background: var(--fg);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ---------- 语言切换 ---------- */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 40px;
  padding: 0 14px;
  border: var(--hair) solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--fg);
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease;
}
.lang-toggle:hover {
  background: var(--surface-subtle);
  border-color: color-mix(in oklch, var(--border) 50%, var(--fg));
}

/* 语言应用前隐藏内容，避免首屏文案闪烁（脚本异常时由兜底超时解除） */
html.i18n-loading body { visibility: hidden; }

/* ---------- Hero ---------- */
.hero { padding-block: 84px 92px; }
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}
.hero h1 { margin-top: 4px; }
.hero__media {
  position: relative;
  border: var(--hair) solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 32px;
}
.hero__media img { width: 100%; height: auto; }

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 72px;
  border-top: var(--hair) solid var(--border);
}
.stat {
  padding: 24px 24px 4px;
  border-left: var(--hair) solid var(--border);
}
.stat:first-child { border-left: 0; padding-left: 0; }
.stat__value {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat__label {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---------- 卡片网格 ---------- */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 56px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 56px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 56px;
}

.card {
  background: var(--surface);
  border: var(--hair) solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px 30px;
  transition: border-color .18s ease, background-color .18s ease;
}
.card:hover { border-color: color-mix(in oklch, var(--border) 55%, var(--fg)); }
.card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.card h3 { margin: 20px 0 0; }
.card p { margin: 12px 0 0; color: var(--muted); font-size: 0.95rem; }

/* ---------- 图文分栏 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.split--media-right .split__media { order: 2; }

.frame {
  border: var(--hair) solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}
.frame img { width: 100%; height: 100%; object-fit: contain; }
.split__media > img { margin-inline: auto; }
.split__media--flush > img { width: 100%; height: auto; }

.split--media-right .split__media,
.split__media {
  border: var(--hair) solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 28px;
}
.split__media--flush { padding: 0; }

.bullet-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.bullet-list li {
  position: relative;
  padding-left: 22px;
  color: var(--fg);
  font-size: 0.98rem;
}
.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border: var(--hair) solid var(--accent);
  border-radius: 2px;
}
.bullet-list li span { color: var(--muted); }

/* ---------- 图库 ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.gallery__item { margin: 0; }
.gallery__frame {
  border: var(--hair) solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}
.gallery__frame img { width: 100%; height: 100%; object-fit: cover; }
.gallery__item figcaption { margin-top: 14px; }
.gallery__title { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; }
.gallery__desc { margin-top: 4px; font-size: 0.9rem; color: var(--muted); }
.gallery__item--wide { grid-column: span 2; }

/* 对比标注 */
.compare-tag {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border: var(--hair) solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
}

/* ---------- 拓扑阶段 ---------- */
.phase {
  background: var(--surface);
  border: var(--hair) solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
}
.phase__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.phase__value {
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.phase p { margin: 14px 0 0; color: var(--muted); font-size: 0.93rem; }

/* ---------- 深色带 ---------- */
.band-ink {
  background: var(--ink);
  color: var(--on-ink);
  border-top: 0;
}
.band-ink h2, .band-ink h3 { color: var(--on-ink); }
.band-ink .eyebrow { color: var(--on-ink-muted); }
.band-ink .eyebrow::before { background: var(--on-ink-muted); }
.band-ink .lede { color: var(--on-ink-muted); }
.band-ink p { color: var(--on-ink-muted); }

.ink-feature {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 44px;
  margin-top: 52px;
  border-top: var(--hair) solid oklch(30% 0.012 250);
  padding-top: 44px;
}
.ink-feature h3 { font-size: 1.05rem; }
.ink-feature p { font-size: 0.93rem; margin-top: 10px; }
.ink-feature__num { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; color: var(--on-ink-muted); }

.band-ink .split__media { background: var(--ink-soft); border-color: oklch(30% 0.012 250); }

/* ---------- CTA 带 ---------- */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding: 64px 0 0;
}
.cta-band h2 { font-size: clamp(1.7rem, 3vw, 2.35rem); max-width: 620px; }

/* ---------- 表格 ---------- */
.table-wrap { margin-top: 40px; }
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}
.spec-table caption {
  text-align: left;
  font-size: 0.85rem;
  color: var(--muted);
  padding-bottom: 16px;
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 15px 16px;
  border-bottom: var(--hair) solid var(--border);
  font-size: 0.93rem;
}
.spec-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom-color: color-mix(in oklch, var(--border) 55%, var(--fg));
}
.spec-table tbody tr { transition: background-color .15s ease; }
.spec-table tbody tr:hover { background: var(--surface-subtle); }
.spec-table td:first-child { font-weight: 500; white-space: nowrap; }
.spec-table .price { font-family: var(--font-mono); }
.spec-table .price--ask { color: var(--muted); }

/* ---------- 说明卡 ---------- */
.note-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.note {
  border: var(--hair) solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--surface-subtle);
}
.note h3 { font-size: 1rem; }
.note p { margin: 10px 0 0; font-size: 0.92rem; color: var(--muted); }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.news-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: var(--hair) solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .18s ease, transform .18s ease;
}
.news-card:hover { border-color: color-mix(in oklch, var(--border) 55%, var(--fg)); }
.news-card__media { aspect-ratio: 3 / 2; overflow: hidden; background: var(--surface-subtle); }
.news-card__media img { width: 100%; height: 100%; object-fit: cover; }
.news-card__body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.news-card__cat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.news-card h3 { margin-top: 14px; font-size: 1.12rem; line-height: 1.28; }
.news-card p { margin: 12px 0 0; font-size: 0.92rem; color: var(--muted); }
.news-card__meta {
  margin-top: auto;
  padding-top: 22px;
  font-size: 0.82rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 56px; }
.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 14px;
  border: var(--hair) solid var(--border);
  border-radius: 10px;
  font-size: 0.9rem;
  color: var(--muted);
  transition: border-color .16s ease, color .16s ease;
}
.pagination a:hover { color: var(--fg); border-color: color-mix(in oklch, var(--border) 55%, var(--fg)); }
.pagination a[aria-current="page"] { color: var(--fg); border-color: var(--fg); font-weight: 500; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--ink);
  color: var(--on-ink);
  padding-block: 72px 40px;
  margin-top: 0;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer__tagline { color: var(--on-ink-muted); margin: 20px 0 0; max-width: 34ch; font-size: 0.95rem; }
.footer__logo { height: 30px; width: auto; filter: brightness(0) invert(1); opacity: .92; }
.footer h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--on-ink-muted);
  font-weight: 500;
  margin: 0 0 18px;
}
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.footer a { color: var(--on-ink); font-size: 0.93rem; }
.footer a:hover { color: var(--on-ink); text-decoration: underline; text-underline-offset: 3px; }
.footer__bottom {
  margin-top: 64px;
  padding-top: 26px;
  border-top: var(--hair) solid oklch(30% 0.012 250);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--on-ink-muted);
}
.status { display: inline-flex; align-items: center; gap: 8px; }
.status__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--success) 24%, transparent);
}

/* ---------- 页面标题区 ---------- */
.page-hero { padding-block: 72px 0; }
.page-hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: var(--hair) solid var(--border);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.85rem;
  background: var(--surface);
}
.chip b { font-weight: 500; }
.chip span { color: var(--muted); }

/* ---------- 滚动进场 ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card, .news-card, .nav__link, .pagination a { transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .ink-feature { grid-template-columns: repeat(2, 1fr); gap: 36px; }
  .note-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 860px) {
  .section { padding-block: 72px; }
  .nav__links, .nav__actions .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .lang-toggle { height: 44px; min-width: 44px; }
  .hero__grid, .page-hero__grid, .split { grid-template-columns: 1fr; gap: 40px; }
  .split--media-right .split__media { order: 0; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; padding-left: 0; }
  .stat { border-top: var(--hair) solid var(--border); }
  .stat:nth-child(1), .stat:nth-child(2) { border-top: 0; }
  .grid-3, .news-grid, .note-grid, .ink-feature { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .gallery__item--wide { grid-column: span 1; }

  /* 移动端菜单 */
  .site-header.is-open { height: auto; }
  .site-header.is-open .nav { flex-wrap: wrap; padding-block: 14px; }
  .site-header.is-open .nav__links {
    display: grid;
    order: 3;
    width: 100%;
    gap: 2px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: var(--hair) solid var(--border);
  }
  .site-header.is-open .nav__link { height: 44px; border-radius: 10px; padding: 0 12px; }
}

@media (max-width: 620px) {
  .container { padding-inline: 20px; }
  .hero { padding-block: 56px 64px; }
  .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: 1fr; }
  .stat { border-left: 0; padding-left: 0; }
  .stat:nth-child(2) { border-top: var(--hair) solid var(--border); }
  .spec-table thead { display: none; }
  .spec-table, .spec-table tbody, .spec-table tr, .spec-table td { display: block; width: 100%; }
  .spec-table tr {
    border: var(--hair) solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    padding: 6px 4px;
    background: var(--surface);
  }
  .spec-table td {
    border: 0;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 9px 14px;
  }
  .spec-table td::before {
    content: attr(data-label);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .spec-table td:first-child { white-space: normal; }
  .footer__top { grid-template-columns: 1fr; }
}