/* ============================================================
   TRANSVOX 官网 · 黑白极简设计系统
   单一真源样式表，供全站多页共享
   ============================================================ */

:root {
  --bg: #ffffff;
  --ink: #0a0a0a;
  --ink-2: #3f3f46;
  --muted: #71717a;
  --faint: #a1a1aa;
  --line: #e8e8ea;
  --line-2: #f0f0f1;
  --soft: #f7f7f8;
  --soft-2: #f1f1f3;
  --card: #ffffff;

  --ok: #16a34a;
  --warn: #b45309;
  --warn-bg: #fffbeb;
  --warn-line: #fde68a;
  --info-bg: #f4f4f5;

  --max: 1120px;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --ease: cubic-bezier(.16, 1, .3, 1);
  --dur: .2s;
  --dur-lg: .35s;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Roboto, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

/* ── Reset ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
::selection { background: var(--ink); color: #fff; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
main { flex: 1 0 auto; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.center { text-align: center; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px;
  font-size: 14px; font-weight: 500; line-height: 1;
  border: 1px solid transparent; cursor: pointer;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #262626; transform: translateY(-1px); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn-lg { padding: 13px 26px; font-size: 15px; }
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn:active { transform: scale(.985); }
.btn.is-disabled,
a.btn[aria-disabled="true"] {
  opacity: .45;
  pointer-events: none;
  cursor: not-allowed;
  transform: none;
}

/* ── Header ── */
header.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line-2);
}
header.site .bar { height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; letter-spacing: -.01em; color: var(--ink); flex: none; }
.brand .mark { width: 28px; height: 28px; border-radius: 7px; flex: none; }
.brand .sub { font-size: 11px; font-weight: 500; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px; letter-spacing: .02em; }

nav.top { display: flex; align-items: center; gap: 2px; margin-left: auto; }
nav.top a { padding: 8px 13px; border-radius: 8px; font-size: 14px; color: var(--ink-2); transition: background var(--dur), color var(--dur); }
nav.top a:hover { background: var(--soft); color: var(--ink); }
nav.top a.active { color: var(--ink); font-weight: 600; }

.header-cta { display: flex; align-items: center; gap: 10px; flex: none; }
.header-cta .ghostlink { font-size: 14px; color: var(--ink-2); padding: 8px 6px; transition: color var(--dur); }
.header-cta .ghostlink:hover { color: var(--ink); }

.nav-toggle { display: none; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 9px; background: #fff; cursor: pointer; align-items: center; justify-content: center; }
.nav-toggle svg { width: 18px; height: 18px; }
.mobile-nav { display: none; border-bottom: 1px solid var(--line-2); background: #fff; }
.mobile-nav.open { display: block; }
.mobile-nav a { display: block; padding: 13px 24px; font-size: 15px; color: var(--ink-2); border-top: 1px solid var(--line-2); }
.mobile-nav a:first-child { border-top: none; }
.mobile-nav a.active { color: var(--ink); font-weight: 600; }
.mobile-nav .m-cta { padding: 16px 24px; }

/* ── Hero ── */
.hero { padding: 84px 0 64px; text-align: center; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(60% 60% at 50% 0%, rgba(0, 0, 0, .04), transparent 70%); }
.badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; font-size: 13px; color: var(--ink-2); background: #fff; margin-bottom: 26px; }
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px rgba(22, 163, 74, .15); }
.hero h1 { font-size: clamp(34px, 5.4vw, 60px); line-height: 1.08; letter-spacing: -.025em; font-weight: 800; margin: 0 auto 22px; max-width: 16ch; }
.hero p.lead { font-size: clamp(15px, 1.8vw, 18px); color: var(--ink-2); max-width: 62ch; margin: 0 auto 34px; line-height: 1.75; }
.hero .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .platforms { margin-top: 22px; font-size: 13px; color: var(--muted); }

/* ── Stats strip ── */
.stats { border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); background: var(--soft); }
.stats .grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { text-align: center; padding: 34px 16px; border-left: 1px solid var(--line-2); }
.stat:first-child { border-left: none; }
.stat .num { font-size: 30px; font-weight: 800; letter-spacing: -.02em; }
.stat .cap { font-size: 13px; color: var(--muted); margin-top: 6px; }

/* ── Section scaffolding ── */
section.block { padding: 84px 0; }
section.block.tight { padding: 56px 0; }
.eyebrow { text-align: center; font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.title { text-align: center; font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; letter-spacing: -.02em; }
.subtitle { text-align: center; color: var(--ink-2); max-width: 54ch; margin: 14px auto 0; font-size: 15px; }
.soft-bg { background: var(--soft); border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); }

/* ── Page header (inner pages) ── */
.page-header { text-align: center; padding: 64px 0 8px; }
.page-header h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; letter-spacing: -.02em; }
.page-header p { color: var(--ink-2); max-width: 56ch; margin: 14px auto 0; font-size: 15px; }
.breadcrumb { font-size: 13px; color: var(--muted); text-align: center; margin-bottom: 8px; }
.breadcrumb a:hover { color: var(--ink); }

/* ── Feature cards ── */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 48px; }
.feature { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; background: var(--card); transition: border-color var(--dur-lg) var(--ease), transform var(--dur-lg) var(--ease), box-shadow var(--dur-lg) var(--ease); }
.feature:hover { border-color: #d4d4d8; transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0, 0, 0, .06); }
.feature .ic { width: 46px; height: 46px; border-radius: 12px; background: var(--ink); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.feature .ic svg { width: 24px; height: 24px; }
.feature h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; letter-spacing: -.01em; }
.feature h3 .en { font-size: 12px; font-weight: 600; color: var(--muted); margin-left: 8px; letter-spacing: .04em; }
.feature p { font-size: 14px; color: var(--ink-2); line-height: 1.75; }

/* ── Language showcase ── */
.lang-cloud { max-width: 860px; margin: 36px auto 0; text-align: center; }
.lang-cloud .note { margin-top: 14px; font-size: 13px; color: var(--muted); line-height: 1.7; }

/* ── Generic card grids ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; background: var(--card); transition: border-color var(--dur-lg) var(--ease), transform var(--dur-lg) var(--ease), box-shadow var(--dur-lg) var(--ease); }
.card:hover { border-color: #d4d4d8; transform: translateY(-2px); box-shadow: 0 10px 26px rgba(0, 0, 0, .05); }
.card .ico { font-size: 26px; margin-bottom: 14px; display: block; }
.card h3, .card h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.card p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }

/* ── Values mini ── */
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 44px; }
.value { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.value h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.value p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }

/* ── Sub-nav (tabs) ── */
.sub-nav { display: flex; gap: 4px; justify-content: center; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin: 28px 0 8px; }
.sub-nav a { padding: 12px 18px; font-size: 14px; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; transition: color var(--dur), border-color var(--dur); }
.sub-nav a:hover { color: var(--ink); }
.sub-nav a.active { color: var(--ink); font-weight: 600; border-bottom-color: var(--ink); }

/* ── Prose / content page ── */
.content { max-width: 760px; margin: 0 auto; padding: 24px 0 8px; }
.content h2 { font-size: 21px; font-weight: 700; margin: 40px 0 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line-2); letter-spacing: -.01em; }
.content h3 { font-size: 16px; font-weight: 700; margin: 26px 0 8px; }
.content p, .content li { font-size: 14.5px; color: var(--ink-2); line-height: 1.85; margin-bottom: 8px; }
.content ul, .content ol { padding-left: 22px; margin-bottom: 16px; }
.content strong { color: var(--ink); font-weight: 600; }
.content a { color: var(--ink); border-bottom: 1px solid var(--faint); transition: border-color var(--dur); }
.content a:hover { border-bottom-color: var(--ink); }
.content small { color: var(--muted); }

/* ── Timeline ── */
.timeline { position: relative; padding-left: 30px; margin-top: 20px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl-item { position: relative; margin-bottom: 22px; padding: 20px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: border-color var(--dur-lg), transform var(--dur-lg) var(--ease); }
.tl-item:hover { border-color: #d4d4d8; transform: translateX(3px); }
.tl-item::before { content: ""; position: absolute; left: -27px; top: 24px; width: 10px; height: 10px; border-radius: 50%; background: var(--ink); box-shadow: 0 0 0 4px var(--bg); }
.tl-item .date { font-size: 12px; font-weight: 600; color: var(--muted); letter-spacing: .04em; }
.tl-item h3 { font-size: 16px; font-weight: 700; margin: 4px 0 6px; }
.tl-item p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }

/* ── Steps ── */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 28px; }
.steps.steps-5 { grid-template-columns: repeat(5, 1fr); }
.step { text-align: center; padding: 0 6px; }
.step .n { width: 40px; height: 40px; border-radius: 50%; background: var(--ink); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-size: 15px; margin-bottom: 12px; }
.step h4 { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.step p { font-size: 12.5px; color: var(--muted); line-height: 1.6; }

/* ── FAQ accordion ── */
.faq-list { max-width: 760px; margin: 28px auto 0; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 10px; overflow: hidden; transition: border-color var(--dur); }
.faq-item.open { border-color: #d4d4d8; }
.faq-q { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 17px 20px; cursor: pointer; font-size: 15px; font-weight: 600; user-select: none; width: 100%; background: none; border: none; font-family: inherit; color: inherit; text-align: left; }
.faq-q .arrow { flex: none; transition: transform var(--dur-lg) var(--ease); color: var(--muted); }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height var(--dur-lg) var(--ease), padding var(--dur-lg) var(--ease); padding: 0 20px; }
.faq-item.open .faq-a { max-height: 1200px; padding: 0 20px 18px; }
.faq-a p { font-size: 14px; color: var(--ink-2); line-height: 1.8; }

/* ── Pricing ── */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 48px; align-items: stretch; }
.plan { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px 26px; background: #fff; display: flex; flex-direction: column; transition: border-color var(--dur-lg), transform var(--dur-lg) var(--ease), box-shadow var(--dur-lg); }
.plan:hover { border-color: #d4d4d8; transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0, 0, 0, .06); }
.plan.featured { border-color: var(--ink); box-shadow: 0 12px 34px rgba(0, 0, 0, .1); }
.plan .pname { font-size: 15px; font-weight: 700; }
.plan .ptag { display: inline-block; margin-left: 8px; font-size: 11px; font-weight: 600; color: #fff; background: var(--ink); border-radius: 999px; padding: 2px 9px; vertical-align: middle; }
.plan .price { font-size: 38px; font-weight: 800; letter-spacing: -.03em; margin: 16px 0 2px; }
.plan .price small { font-size: 14px; font-weight: 500; color: var(--muted); }
.plan .pdesc { font-size: 13px; color: var(--muted); min-height: 38px; }
.plan ul { list-style: none; margin: 18px 0 24px; }
.plan ul li { font-size: 13.5px; color: var(--ink-2); padding: 7px 0 7px 24px; position: relative; border-top: 1px solid var(--line-2); }
.plan ul li:first-child { border-top: none; }
.plan ul li::before { content: ""; position: absolute; left: 2px; top: 13px; width: 11px; height: 6px; border-left: 2px solid var(--ink); border-bottom: 2px solid var(--ink); transform: rotate(-45deg); }
.plan ul li.off { color: var(--faint); }
.plan ul li.off::before { border-color: var(--faint); transform: none; top: 14px; left: 3px; width: 9px; height: 0; border-bottom: 2px solid var(--faint); border-left: none; }
.plan .btn { margin-top: auto; width: 100%; }

/* ── Download cards + install tabs ── */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 40px; }
.dl-card { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; text-align: center; background: #fff; transition: border-color var(--dur-lg), transform var(--dur-lg) var(--ease), box-shadow var(--dur-lg); }
.dl-card:hover { border-color: #d4d4d8; transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0, 0, 0, .06); }
.dl-card .ico { font-size: 34px; margin-bottom: 14px; }
.dl-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.dl-card p { font-size: 13px; color: var(--muted); margin-bottom: 16px; line-height: 1.6; }
.release-meta { display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 28px; margin-top: 18px; color: var(--muted); font-size: 13px; }
.release-notes { max-width: 680px; margin: 12px auto 0; color: var(--ink-2); font-size: 14px; line-height: 1.75; text-align: center; white-space: pre-line; }
.dl-card .dl-file { min-height: 42px; overflow-wrap: anywhere; }
.dl-card .dl-primary { min-width: 132px; }
.dl-channels { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px 14px; min-height: 20px; margin-top: 14px; }
.dl-channels a { color: var(--muted); font-size: 12px; border-bottom: 1px solid var(--line); }
.dl-channels a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.news-note a { color: var(--ink-2); border-bottom: 1px solid var(--line); }
.news-note a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.release-history-list { display: grid; gap: 18px; max-width: 920px; margin: 40px auto 0; }
.release-history-card { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; background: #fff; }
.release-history-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding-bottom: 18px; border-bottom: 1px solid var(--line-2); }
.release-history-version { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.release-history-version h2 { font-size: 24px; line-height: 1.2; letter-spacing: -.02em; }
.release-history-version .tag { margin: 0; }
.release-history-meta { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 6px 16px; color: var(--muted); font-size: 12.5px; text-align: right; }
.release-history-notes { margin-top: 18px; color: var(--ink-2); font-size: 14px; line-height: 1.75; white-space: pre-line; }
.release-assets { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 20px; }
.release-asset { position: relative; display: flex; flex-direction: column; gap: 7px; min-width: 0; padding: 16px 96px 16px 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--soft); transition: border-color var(--dur), background var(--dur); }
.release-asset:hover { border-color: #c7c7cc; background: #fff; }
.release-asset-heading { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 14px; }
.release-asset-heading .tag { margin: 0; padding: 2px 8px; font-size: 10px; }
.release-asset-meta { color: var(--muted); font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.release-asset-action { position: absolute; top: 50%; right: 18px; color: var(--ink); font-size: 13px; font-weight: 700; transform: translateY(-50%); }
.release-history-empty { margin-top: 18px; color: var(--muted); font-size: 13px; }
.release-history-state { padding: 54px 20px; border: 1px dashed var(--line); border-radius: var(--radius-lg); color: var(--muted); font-size: 14px; text-align: center; }
.release-history-state.is-error { color: var(--warn); border-color: var(--warn-line); background: var(--warn-bg); }
.tabs { display: flex; justify-content: center; gap: 4px; border-bottom: 1px solid var(--line); margin: 36px 0 0; }
.tab-btn { padding: 12px 22px; background: none; border: none; border-bottom: 2px solid transparent; margin-bottom: -1px; font-size: 14px; color: var(--muted); cursor: pointer; font-family: inherit; }
.tab-btn.active { color: var(--ink); font-weight: 600; border-bottom-color: var(--ink); }
.tab-panel { display: none; padding-top: 28px; }
.tab-panel.active { display: block; }

/* ── Alerts ── */
.alert { padding: 14px 18px; border-radius: var(--radius); font-size: 14px; line-height: 1.7; margin: 16px 0; }
.alert-info { background: var(--info-bg); border: 1px solid var(--line); color: var(--ink-2); }
.alert-warn { background: var(--warn-bg); border: 1px solid var(--warn-line); color: var(--warn); }
.alert strong { color: inherit; }

/* ── Tags ── */
.tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--ink-2); background: var(--soft); border: 1px solid var(--line); border-radius: 999px; padding: 3px 11px; margin: 0 4px 4px 0; }
.tag.solid { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ── News ── */
.news-toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; justify-content: space-between; margin: 28px 0 18px; }
.news-search { display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 10px; padding: 9px 14px; background: #fff; flex: 1; min-width: 200px; max-width: 360px; }
.news-search input { border: none; outline: none; font-size: 14px; font-family: inherit; width: 100%; background: none; color: var(--ink); }
.news-search svg { width: 16px; height: 16px; color: var(--muted); flex: none; }
.news-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font-size: 13px; color: var(--ink-2); background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 7px 14px; cursor: pointer; transition: all var(--dur); }
.chip:hover { border-color: var(--ink); }
.chip.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 8px; }
.news-card { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 22px; background: #fff; transition: border-color var(--dur-lg), transform var(--dur-lg) var(--ease), box-shadow var(--dur-lg); }
.news-card:hover { border-color: #d4d4d8; transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0, 0, 0, .06); }
.news-card .meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); margin-bottom: 12px; }
.news-card .meta .src { font-weight: 600; color: var(--ink-2); }
.news-card .meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--faint); }
.news-card h3 { font-size: 16px; font-weight: 700; line-height: 1.4; margin-bottom: 10px; letter-spacing: -.01em; }
.news-card h3 a { transition: opacity var(--dur); }
.news-card h3 a:hover { opacity: .65; }
.news-card p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; margin-bottom: 14px; flex: 1; }
.news-card .foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.news-card .read { font-size: 13px; font-weight: 600; color: var(--ink); display: inline-flex; align-items: center; gap: 4px; }
.news-empty { text-align: center; padding: 60px 20px; color: var(--muted); font-size: 14px; }
.news-note { text-align: center; font-size: 12.5px; color: var(--faint); margin-top: 26px; }

/* ── CTA band ── */
.cta { text-align: center; }
.cta .box { margin-top: 12px; border: 1px solid var(--line); border-radius: var(--radius-xl); padding: 56px 32px; background: linear-gradient(180deg, #fff, var(--soft)); }
.cta .box h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; letter-spacing: -.02em; }
.cta .box p { color: var(--ink-2); max-width: 52ch; margin: 12px auto 26px; }

/* ── Contact box ── */
.contact { text-align: center; }
.contact .box { margin-top: 40px; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 44px 32px; background: var(--card); }
.contact .box .mail { font-size: clamp(18px, 2.6vw, 26px); font-weight: 700; letter-spacing: -.01em; margin: 10px 0 4px; }
.contact .box .hint { font-size: 13px; color: var(--muted); }

/* ── Footer ── */
footer.site { flex: none; border-top: 1px solid var(--line); padding: 56px 0 32px; background: #fff; }
footer.site .cols-wrap { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 40px; }
footer.site .desc { max-width: 34ch; font-size: 13px; color: var(--muted); margin-top: 12px; line-height: 1.7; }
footer.site .col h5 { font-size: 13px; font-weight: 700; margin-bottom: 14px; }
footer.site .col a { display: block; font-size: 13px; color: var(--muted); padding: 5px 0; transition: color var(--dur); }
footer.site .col a:hover { color: var(--ink); }
footer.site .bottom { margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line-2); display: flex; align-items: center; justify-content: center; gap: 8px 18px; flex-wrap: wrap; text-align: center; }
footer.site .bottom p, footer.site .bottom a { font-size: 12.5px; color: var(--muted); }
footer.site .bottom a:hover { color: var(--ink); }
footer.site .bottom .beian { display: inline-flex; align-items: center; gap: 6px; }
footer.site .bottom .beian img { width: 16px; height: 16px; display: block; }

/* ── Reveal on scroll ── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .06s; }
.reveal.d2 { transition-delay: .12s; }
.reveal.d3 { transition-delay: .18s; }
.reveal.d4 { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ── Responsive ── */
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .plans { grid-template-columns: 1fr; max-width: 440px; margin-left: auto; margin-right: auto; }
  .dl-grid { grid-template-columns: 1fr; max-width: 420px; margin-left: auto; margin-right: auto; }
  .release-assets { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  nav.top, .header-cta .ghostlink, .header-cta .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .cards { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .values { grid-template-columns: 1fr; }
  .stats .grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(odd) { border-left: none; }
  .stat:nth-child(3), .stat:nth-child(4) { border-top: 1px solid var(--line-2); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  section.block { padding: 60px 0; }
  .hero { padding: 60px 0 48px; }
  footer.site .cols-wrap { grid-template-columns: 1fr 1fr; gap: 28px; }
  .news-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .grid-2 { grid-template-columns: 1fr; }
  .stats .grid { grid-template-columns: 1fr; }
  .stat { border-left: none; border-top: 1px solid var(--line-2); }
  .stat:first-child { border-top: none; }
  .steps { grid-template-columns: 1fr; }
  .release-history-card { padding: 22px 18px; }
  .release-history-head { display: block; }
  .release-history-meta { justify-content: flex-start; margin-top: 10px; text-align: left; }
  .release-asset { padding-right: 18px; }
  .release-asset-action { position: static; margin-top: 3px; transform: none; }
  .brand .sub { display: none; }
  footer.site .cols-wrap { grid-template-columns: 1fr; }
}