/* ─────────────────────────────────────────────────────────
   Cassotis IME · 言泉输入法 — Site Styles
   月白为底 · 靛青为墨 · 朱砂作印 —— 青花瓷与印泥的配色
   ───────────────────────────────────────────────────────── */

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  /* Porcelain & ink — navy sampled from the brand mark */
  --paper:      #f3f6f8;
  --paper-soft: #eaf0f3;

  --ink:        #1d2740;
  --ink-soft:   #4c5670;
  --ink-faint:  #8890a3;

  --navy:       #2a4374;
  --navy-deep:  #1b2c50;
  --navy-night: #16223d;

  /* 朱砂 — seal-paste red, used sparingly like a stamp */
  --seal:       #b0432f;
  --seal-soft:  #cf8266;

  --line:       rgba(42, 67, 116, 0.16);
  --line-soft:  rgba(42, 67, 116, 0.09);

  --radius:     6px;
  --radius-card: 10px;
  --shadow-lift: 0 1px 2px rgba(22, 34, 61, 0.05), 0 22px 48px -24px rgba(22, 34, 61, 0.28);

  --max-w: 1080px;

  --serif-cn: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
  /* 西文标签里夹带的中文落到 Noto Serif SC，而不是系统默认宋体 */
  --serif-en: 'EB Garamond', 'Noto Serif SC', 'Georgia', 'Times New Roman', serif;
  --sans:     'Inter', 'PingFang SC', 'Microsoft YaHei UI', system-ui, sans-serif;
  --mono:     'Cascadia Mono', 'SFMono-Regular', Consolas, monospace;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  font-family: var(--sans);
  /* Inter 的上下文替换会把 “11 x64” 中的 x 渲染成乘号 */
  font-feature-settings: "calt" 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-width: 320px;
}

img { display: block; max-width: 100%; }
a   { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

h1, h2, h3, blockquote p { text-wrap: balance; }
p, li { text-wrap: pretty; }

.nowrap { white-space: nowrap; }

::selection { background: rgba(176, 67, 47, 0.18); }

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

/* In-text links */
p a {
  color: var(--navy);
  border-bottom: 1px solid rgba(42, 67, 116, 0.35);
  transition: border-color 0.15s, color 0.15s;
}
p a:hover { color: var(--navy-deep); border-color: var(--navy-deep); }

:not(pre) > code {
  padding: 0.08em 0.4em;
  border-radius: 4px;
  background: rgba(42, 67, 116, 0.07);
  font-family: var(--mono);
  font-size: 0.86em;
  color: var(--navy-deep);
}

.download-band :not(pre) > code {
  background: rgba(223, 231, 238, 0.1);
  color: #f1f5f9;
}

/* 浏览器默认等宽字体在中文页面里会落到新宋体 */
pre code {
  font-family: inherit;
  font-size: inherit;
}

/* ── Header ─────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(243, 246, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand img {
  width: 36px;
  height: 36px;
  /* 素材自带白底，multiply 使其融入月白底色 */
  mix-blend-mode: multiply;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }

.brand-text strong {
  font-family: var(--serif-en);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--navy-deep);
}

.brand-text span {
  font-family: var(--serif-cn);
  font-size: 0.78rem;
  color: var(--ink-soft);
  letter-spacing: 0.24em;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 26px;
  font-size: 0.88rem;
  color: var(--ink-soft);
  white-space: nowrap;
}

.site-nav a:not(.nav-github) {
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.site-nav a:not(.nav-github):hover {
  color: var(--navy-deep);
  border-color: var(--seal);
}

.site-nav .nav-platform {
  color: var(--navy-deep);
  font-weight: 500;
}

/* 章节锚点与其他平台版本之间的分隔线 */
.site-nav a:not(.nav-platform) + .nav-platform {
  position: relative;
  margin-left: 1px;
}

.site-nav a:not(.nav-platform) + .nav-platform::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -14px;
  width: 1px;
  height: 14px;
  background: var(--line);
  transform: translateY(-50%);
}

.nav-github {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--navy-deep);
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s;
}

.nav-github:hover {
  border-color: var(--navy);
  background: rgba(42, 67, 116, 0.05);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 26px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn-solid {
  background: var(--navy-deep);
  color: #f1f5f9;
}
.btn-solid:hover { background: var(--navy); }

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--navy-deep);
}
.btn-ghost:hover {
  border-color: var(--navy);
  background: rgba(42, 67, 116, 0.05);
}

.btn-accent {
  background: var(--seal);
  color: #fff;
}
.btn-accent:hover { background: #983824; }

.btn-outline-light {
  border: 1px solid rgba(238, 243, 248, 0.35);
  color: #f1f5f9;
}
.btn-outline-light:hover {
  border-color: rgba(238, 243, 248, 0.7);
  background: rgba(238, 243, 248, 0.07);
}

.btn-badge {
  font-family: var(--serif-en);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  padding: 1px 8px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
}

/* ── Hero ───────────────────────────────────────────────── */
.hero {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 92px 24px 0;
  overflow: hidden;
}

/* 巨型「泉」字水印 */
.hero-seal {
  position: absolute;
  top: 8px;
  right: -30px;
  font-family: var(--serif-cn);
  font-weight: 400;
  font-size: clamp(280px, 36vw, 460px);
  line-height: 1;
  color: rgba(42, 67, 116, 0.05);
  pointer-events: none;
  user-select: none;
}

.hero-copy {
  position: relative;
  max-width: 620px;
}

.hero-meta {
  font-family: var(--serif-en);
  font-size: 0.86rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--seal);
  margin-bottom: 26px;
}

.hero h1 {
  font-family: var(--serif-cn);
  font-weight: 600;
  font-size: clamp(2rem, 4.6vw, 3.1rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--navy-deep);
  margin-bottom: 26px;
}

.hero-lead {
  font-size: 1.02rem;
  color: var(--ink-soft);
  line-height: 2;
  max-width: 34em;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* Snapshot */
.snapshot {
  position: relative;
  margin: 72px auto 0;
  width: 100%;
  max-width: 552px;
}

.snapshot-frame {
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  padding: 0;
  box-shadow: var(--shadow-lift);
}

.snapshot-frame img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  margin: 0 auto;
}

.snapshot figcaption {
  margin-top: 16px;
  font-size: 0.84rem;
  color: var(--ink-faint);
  text-align: center;
  letter-spacing: 0.04em;
}

/* 三条原则 */
.hero-tenets {
  margin-top: 80px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  border-top: 1px solid var(--line);
  padding-top: 36px;
}

.hero-tenets h3 {
  font-family: var(--serif-cn);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--navy-deep);
  margin-bottom: 10px;
}

.hero-tenets h3::before {
  content: '';
  display: block;
  width: 22px;
  height: 2px;
  background: var(--seal);
  margin-bottom: 14px;
}

.hero-tenets p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

/* ── Sections ───────────────────────────────────────────── */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 110px 24px 0;
}

.section-head { margin-bottom: 48px; }

.section-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--seal);
  border-radius: 50%;
  font-family: var(--serif-cn);
  font-size: 0.95rem;
  color: var(--seal);
  margin-bottom: 20px;
}

.section-head h2 {
  font-family: var(--serif-cn);
  font-weight: 600;
  font-size: clamp(1.5rem, 2.6vw, 1.95rem);
  line-height: 1.4;
  letter-spacing: 0.03em;
  color: var(--navy-deep);
}

.section-lead {
  max-width: 46em;
  margin-top: 14px;
  font-size: 0.94rem;
  color: var(--ink-soft);
  line-height: 1.9;
}

/* ── Features ───────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px 44px;
}

.feature-pair {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: inherit;
}

.feature {
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.feature-no {
  font-family: var(--serif-en);
  font-size: 0.85rem;
  font-style: italic;
  letter-spacing: 0.1em;
  color: var(--seal);
}

.feature h3 {
  font-family: var(--serif-cn);
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--navy-deep);
  margin: 10px 0 12px;
}

.feature p {
  font-size: 0.89rem;
  color: var(--ink-soft);
  line-height: 1.9;
}

.feature-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 42px minmax(150px, 210px) minmax(0, 1fr);
  align-items: start;
  column-gap: 22px;
}

.feature-wide h3,
.feature-wide p {
  margin-top: 0;
}

/* 带截图的通栏特色：截图占右侧一列 */
.feature-wide.feature-figure {
  grid-template-columns: 42px minmax(150px, 210px) minmax(0, 1fr) auto;
}

.feature-shot {
  display: block;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  box-shadow: var(--shadow-lift);
}

/* ── Language model section ─────────────────────────────── */
.timeline {
  border-top: 1px solid var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 8px 44px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line-soft);
}

.timeline-stage {
  display: block;
  font-family: var(--serif-cn);
  font-size: 0.86rem;
  letter-spacing: 0.18em;
  color: var(--seal);
}

.timeline-range {
  display: block;
  margin-top: 6px;
  font-family: var(--serif-en);
  font-style: italic;
  font-synthesis-style: none;
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}

.timeline-body h3 {
  font-family: var(--serif-cn);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--navy-deep);
  margin-bottom: 10px;
}

.timeline-body p {
  max-width: 46em;
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.95;
}

.timeline-note {
  margin: 20px 0 72px;
  font-size: 0.84rem;
  color: var(--ink-faint);
}

.model-aside {
  max-width: 50em;
  margin-top: 48px;
  border-left: 2px solid var(--seal-soft);
  padding-left: 18px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 2;
}

/* ── Pull quote ─────────────────────────────────────────── */
.quote-section { max-width: 820px; }

.pull-quote {
  position: relative;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.pull-quote::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 3px;
  background: var(--seal);
}

.pull-quote p {
  font-family: var(--serif-cn);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 2.1;
  letter-spacing: 0.04em;
  color: var(--ink);
}

/* ── Benchmark ──────────────────────────────────────────── */
.benchmark-block + .benchmark-block { margin-top: 56px; }

.benchmark-title {
  font-family: var(--serif-cn);
  font-size: 1.16rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--navy-deep);
}

.benchmark-lead {
  max-width: 50em;
  margin: 10px 0 22px;
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.85;
}

.benchmark-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.benchmark-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.benchmark-table-wide { min-width: 900px; }

.benchmark-table th {
  text-align: right;
  padding: 10px 14px;
  font-family: var(--serif-en);
  font-weight: 500;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--navy-deep);
  white-space: nowrap;
}

.benchmark-table th:first-child { text-align: left; }

.benchmark-table td {
  text-align: right;
  padding: 11px 14px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-soft);
  white-space: nowrap;
}

.benchmark-table td:first-child {
  text-align: left;
  font-family: var(--serif-en);
  font-size: 0.92rem;
  letter-spacing: 0.05em;
  color: var(--ink);
}

/* 百分比是主读数，样本计数退为辅助的浅色小字 */
.benchmark-table td:has(> .pct) {
  font-size: 0.8rem;
  color: var(--ink-faint);
}

.benchmark-table .pct {
  display: inline-block;
  min-width: 4.4em;
  margin-left: 10px;
  text-align: right;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.benchmark-table-wide th,
.benchmark-table-wide td { padding-left: 10px; padding-right: 10px; }

.benchmark-table-wide .pct {
  display: block;
  min-width: 0;
  margin: 2px 0 0;
}

.benchmark-table-wide .pct + br { display: none; }

.benchmark-table .row-current td {
  color: var(--ink);
  font-weight: 500;
  background: rgba(255, 255, 255, 0.9);
}

.benchmark-table .row-current td:has(> .pct) { color: var(--ink-soft); }

.benchmark-table .row-current td:first-child {
  color: var(--seal);
  box-shadow: inset 3px 0 0 var(--seal);
}

.benchmark-table .row-current .pct {
  color: var(--seal);
  font-weight: 600;
}

.benchmark-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 13px 0;
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  background: none;
  font: inherit;
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--navy);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.benchmark-toggle:hover {
  color: var(--seal);
  background: rgba(42, 67, 116, 0.03);
}

.benchmark-toggle::after {
  content: '';
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 0.2s;
}

.benchmark-toggle[aria-expanded="true"]::after {
  transform: translateY(2px) rotate(-135deg);
}

.benchmark-note {
  max-width: 60em;
  margin-top: 16px;
  font-size: 0.82rem;
  color: var(--ink-faint);
  line-height: 1.8;
}

/* ── Origin ─────────────────────────────────────────────── */
.origin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 64px;
}

.origin-col { position: relative; }

.origin-col + .origin-col { border-left: 1px solid var(--line); padding-left: 64px; }

.origin-title-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 500;
  font-size: 1.9rem;
  letter-spacing: 0.03em;
  color: var(--navy-deep);
  margin-bottom: 20px;
}

.origin-title-cn {
  font-family: var(--serif-cn);
  font-weight: 600;
  font-size: 1.7rem;
  letter-spacing: 0.28em;
  color: var(--navy-deep);
  margin-bottom: 20px;
}

.origin-col p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 2;
  margin-bottom: 16px;
}

.origin-aside {
  border-left: 2px solid var(--seal-soft);
  padding-left: 14px;
  font-size: 0.85rem !important;
  color: var(--ink-faint) !important;
}

/* ── Status ─────────────────────────────────────────────── */
.status-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 64px;
}

.status-col h3 {
  font-family: var(--serif-cn);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--navy-deep);
  margin-bottom: 18px;
}

.status-col h3::before {
  content: '';
  display: block;
  width: 22px;
  height: 2px;
  background: var(--seal);
  margin-bottom: 14px;
}

.status-col ul { display: grid; gap: 12px; }

.status-col li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

.status-col li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--seal-soft);
}

.status-note {
  margin-top: 40px;
  font-size: 0.88rem;
  color: var(--ink-faint);
}

/* ── Linux edition ─────────────────────────────────────── */
.linux-snapshot {
  max-width: 602px;
}

.linux-snapshot-frame {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.linux-snapshot-frame img {
  width: 600px;
  height: 282px;
  max-width: none;
  margin: 0;
}

.linux-quote { padding-top: 92px; }

/* ── macOS edition ─────────────────────────────────────── */
.edition-note {
  margin-top: 18px;
  font-size: 0.8rem;
  color: var(--ink-faint);
  line-height: 1.8;
}

.mac-snapshot { max-width: 602px; }

.mac-snapshot-frame {
  border-radius: 20px;
  overflow: hidden;
}

.mac-snapshot-frame img,
.mac-installer-frame img {
  width: 100%;
  height: auto;
}

.mac-benchmark {
  scroll-margin-top: 90px;
  margin-top: 48px;
}

.mac-installer {
  max-width: 762px;
  margin-top: 40px;
}

.mac-installer-frame {
  border-radius: 16px;
  overflow: hidden;
}

.mac-shortcuts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 40px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.mac-shortcuts dt {
  color: var(--ink-soft);
  line-height: 2.5;
}

.mac-shortcuts kbd {
  display: inline-block;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fbfcfe;
  box-shadow: 0 2px 0 var(--line-soft);
  font-family: var(--sans);
  font-size: 0.84rem;
  line-height: 1.9;
  color: var(--navy-deep);
}

.mac-shortcuts dd {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 0.84rem;
}

.framework-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.framework-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: rgba(251, 252, 254, 0.72);
}

.framework-title {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-soft);
}

.framework-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--seal-soft);
  border-radius: 50%;
  font-family: var(--serif-en);
  font-style: italic;
  color: var(--seal);
}

.framework-title h3 {
  font-family: var(--serif-en);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--navy-deep);
  letter-spacing: 0.04em;
}

.framework-title p {
  font-size: 0.75rem;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
}

.framework-card ul {
  display: grid;
  gap: 11px;
  margin-top: 20px;
}

.framework-card li {
  position: relative;
  padding-left: 18px;
  font-size: 0.87rem;
  color: var(--ink-soft);
  line-height: 1.75;
}

.framework-card li::before {
  content: '';
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border: 1px solid var(--seal-soft);
  transform: rotate(45deg);
}

.shared-core-strip {
  display: block;
  margin-top: 28px;
  padding: 24px 28px;
  border-left: 3px solid var(--seal);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  background: var(--paper-soft);
}

.shared-core-strip strong {
  display: block;
  margin-top: 5px;
  font-family: var(--serif-cn);
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy-deep);
}

.shared-core-label {
  font-family: var(--serif-en);
  font-size: 0.7rem;
  color: var(--seal);
  letter-spacing: 0.16em;
}

.shared-core-strip p {
  margin-top: 10px;
  max-width: 880px;
  font-size: 0.84rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

.install-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.install-step {
  min-height: 190px;
  padding: 24px;
  border-top: 2px solid var(--navy-deep);
  border-radius: 0 0 var(--radius-card) var(--radius-card);
  background: rgba(251, 252, 254, 0.58);
}

.install-no {
  font-family: var(--serif-en);
  font-size: 0.78rem;
  font-style: italic;
  color: var(--seal);
  letter-spacing: 0.1em;
}

.install-step h3 {
  margin: 17px 0 10px;
  font-family: var(--serif-cn);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--navy-deep);
}

.install-step p {
  font-size: 0.84rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.command-block {
  margin-top: 28px;
  border: 1px solid rgba(22, 34, 61, 0.45);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--navy-night);
  box-shadow: var(--shadow-lift);
}

.command-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 18px;
  border-bottom: 1px solid rgba(223, 231, 238, 0.12);
  font-family: var(--serif-en);
  font-size: 0.72rem;
  color: rgba(223, 231, 238, 0.5);
  letter-spacing: 0.08em;
}

.command-block pre {
  padding: 22px 24px;
  overflow-x: auto;
  color: #edf2f7;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.85;
}

.install-notes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  margin-top: 26px;
}

.install-notes p {
  padding-left: 16px;
  border-left: 1px solid var(--seal-soft);
  font-size: 0.84rem;
  color: var(--ink-soft);
  line-height: 1.85;
}

.install-notes strong { color: var(--navy-deep); }

.install-user {
  scroll-margin-top: 80px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.install-user > h3 {
  margin-bottom: 16px;
  font-family: var(--serif-cn);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--navy-deep);
}

.install-user > p {
  margin-top: 20px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.9;
}

.install-user code { overflow-wrap: anywhere; }

.install-user > .hero-actions { margin-top: 22px; }

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.support-card {
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: rgba(251, 252, 254, 0.58);
}

.support-card.support-primary {
  border-color: rgba(176, 67, 47, 0.35);
  background: rgba(255, 255, 255, 0.9);
}

.support-state {
  font-family: var(--serif-en);
  font-size: 0.67rem;
  letter-spacing: 0.14em;
  color: var(--seal);
}

.support-card h3 {
  margin-top: 14px;
  font-family: var(--serif-en);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--navy-deep);
}

.support-card p {
  margin-top: 3px;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.support-card small {
  display: block;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.75rem;
  line-height: 1.75;
  color: var(--ink-faint);
}

/* ── Download band ──────────────────────────────────────── */
.download-band {
  margin-top: 120px;
  background: var(--navy-night);
  color: #dfe7ee;
}

.download-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 76px 24px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 56px;
}

.section-no-light {
  border-color: var(--seal-soft);
  color: var(--seal-soft);
}

.download-info h2 {
  font-family: var(--serif-cn);
  font-weight: 600;
  font-size: 1.7rem;
  letter-spacing: 0.06em;
  color: #f1f5f9;
  margin-bottom: 16px;
}

.download-info p {
  font-size: 0.92rem;
  color: rgba(223, 231, 238, 0.72);
  line-height: 2;
  max-width: 30em;
}

.download-info p a {
  color: #f1f5f9;
  border-bottom-color: rgba(223, 231, 238, 0.35);
}
.download-info p a:hover { color: #fff; border-color: #f1f5f9; }

.download-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 14px;
  flex-shrink: 0;
  min-width: 240px;
  padding-top: 60px;
}

.download-note {
  font-size: 0.8rem;
  color: rgba(223, 231, 238, 0.45);
  text-align: right;
}

.download-note a {
  color: rgba(223, 231, 238, 0.7);
  border-bottom: 1px solid rgba(223, 231, 238, 0.3);
}
.download-note a:hover { color: #f1f5f9; border-color: #f1f5f9; }

/* ── Footer ─────────────────────────────────────────────── */
.site-footer {
  background: var(--navy-night);
  border-top: 1px solid rgba(223, 231, 238, 0.1);
  padding: 36px 24px 30px;
}

.footer-inner {
  max-width: calc(var(--max-w) - 48px);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand { display: flex; align-items: center; gap: 14px; }

.footer-brand img {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  opacity: 0.9;
}

.footer-name {
  font-family: var(--serif-en);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: rgba(223, 231, 238, 0.85);
}

.footer-name span {
  font-family: var(--serif-cn);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  margin-left: 6px;
}

.footer-meta {
  font-size: 0.76rem;
  color: rgba(223, 231, 238, 0.4);
  letter-spacing: 0.04em;
  margin-top: 3px;
}

.footer-links { display: flex; flex-wrap: wrap; gap: 12px 24px; font-size: 0.85rem; }

.footer-links a {
  color: rgba(223, 231, 238, 0.55);
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.footer-links a:hover {
  color: #f1f5f9;
  border-color: var(--seal-soft);
}

.footer-copy {
  max-width: calc(var(--max-w) - 48px);
  margin: 28px auto 0;
  padding-top: 22px;
  border-top: 1px solid rgba(223, 231, 238, 0.08);
  font-size: 0.78rem;
  color: rgba(223, 231, 238, 0.3);
  letter-spacing: 0.04em;
}

.footer-copy em { font-family: var(--serif-en); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 960px) {
  .site-nav a:not(.nav-github):not(.nav-platform) { display: none; }
  .site-nav a:not(.nav-platform) + .nav-platform::before { display: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-seal { font-size: 300px; right: -80px; opacity: 0.7; }

  .support-grid {
    grid-template-columns: 1fr 1fr;
  }

}

@media (max-width: 760px) {
  .hero { padding-top: 64px; }
  .hero-tenets { grid-template-columns: 1fr; gap: 28px; }

  .origin-grid { grid-template-columns: 1fr; gap: 48px; }
  .origin-col + .origin-col {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 48px;
  }

  .status-grid { grid-template-columns: 1fr; }

  .framework-grid,
  .shared-core-strip,
  .install-notes {
    grid-template-columns: 1fr;
  }

  .install-grid {
    grid-template-columns: 1fr;
  }

  .install-step { min-height: 0; }

  .download-inner {
    flex-direction: column;
    gap: 36px;
    padding: 56px 24px;
  }
  .download-actions { padding-top: 0; align-items: flex-start; min-width: 0; width: 100%; max-width: 320px; }
  .download-actions .btn { width: 100%; }
  .download-note { text-align: left; }
}

@media (max-width: 640px) {
  .header-inner { padding: 0 16px; gap: 12px; }
  .brand { gap: 8px; }
  .brand-text span { display: none; }
  .site-nav a:not(.nav-github):not(.nav-platform) { display: none; }
  .site-nav { gap: 10px; }
  .nav-github { padding: 7px 10px; }
  .nav-platform { font-size: 0.8rem; }

  .section { padding-top: 80px; }
  .download-band { margin-top: 90px; }

  .feature-grid,
  .feature-pair { grid-template-columns: 1fr; gap: 36px; }

  .feature-wide {
    display: block;
  }

  .feature-wide h3 {
    margin-top: 10px;
  }

  .feature-shot {
    margin-top: 18px;
  }

  .hero-meta { letter-spacing: 0.12em; }
  .hero-actions .btn { flex: 1 1 100%; }

  .hero-seal { display: none; }

  .timeline-item { grid-template-columns: 1fr; padding: 24px 0; }
  .timeline-meta { display: flex; align-items: baseline; gap: 12px; }
  .timeline-range { margin-top: 0; }

  .benchmark-table { font-size: 0.82rem; }
  .benchmark-table .pct { display: block; margin-left: 0; min-width: 0; }
  .benchmark-wrap { overflow-x: auto; }

  .support-grid { grid-template-columns: 1fr; }
  .support-card.support-primary { grid-column: auto; }
  .command-head { flex-direction: column; gap: 2px; }
}

@media (max-width: 400px) {
  .site-nav .nav-github svg { display: none; }
  .brand-text { display: none; }
  .mac-shortcuts { grid-template-columns: 1fr; gap: 20px; }
  .footer-name span { display: block; margin: 4px 0 0; }
}