:root {
  --color-bg: #071019;
  --color-bg-elevated: #0b1623;
  --color-surface: rgba(10, 21, 35, 0.82);
  --color-surface-strong: #0f1d2f;
  --color-text: #ecf5ff;
  --color-text-soft: #90a8c5;
  --color-rule: rgba(176, 197, 227, 0.14);
  --color-accent: #63e6ff;
  --color-accent-soft: #6aa6ff;
  --color-accent-fog: rgba(99, 230, 255, 0.12);
  --color-code-bg: #0d1d2d;
  --shadow-soft: 0 28px 80px rgba(0, 0, 0, 0.42);
  --shadow-card: 0 16px 36px rgba(0, 0, 0, 0.28);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;
  --shell-wide: 1240px;
  --shell-read: 760px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 5rem;
  --space-10: 7rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(99, 230, 255, 0.1), transparent 26%),
    radial-gradient(circle at 82% 14%, rgba(106, 166, 255, 0.12), transparent 20%),
    linear-gradient(180deg, #050c14 0%, var(--color-bg) 42%, #09121c 100%);
  min-height: 100vh;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.08;
  background-image:
    linear-gradient(to right, rgba(126, 175, 230, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(126, 175, 230, 0.08) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at center, black 48%, transparent 100%);
}

::selection {
  background: rgba(99, 230, 255, 0.18);
  color: var(--color-text);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.shell {
  width: min(calc(100% - 2rem), var(--shell-wide));
  margin: 0 auto;
}

.shell-read {
  width: min(calc(100% - 2rem), var(--shell-read));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(7, 16, 25, 0.78);
  border-bottom: 1px solid transparent;
  transition: border-color 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--color-rule);
  background: rgba(7, 16, 25, 0.92);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.brand-mark {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.75rem;
  display: grid;
  place-items: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0;
  letter-spacing: 0.08em;
  color: transparent;
  background-color: #0b1623;
  background-image: url("assets/brand/icon-192.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border: 1px solid rgba(176, 197, 227, 0.2);
  box-shadow: 0 8px 24px rgba(99, 230, 255, 0.18);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.brand-title {
  font-size: 0.96rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-subtitle {
  color: var(--color-text-soft);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.site-nav a {
  position: relative;
  padding: 0.35rem 0;
  color: var(--color-text-soft);
  font-size: 0.95rem;
  transition: color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1rem;
  width: 100%;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--color-text);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

main {
  display: block;
  padding-bottom: var(--space-10);
}

.section {
  padding: var(--space-9) 0 0;
}

.page-hero {
  padding: var(--space-10) 0 var(--space-8);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: var(--space-5);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-soft);
}

.kicker::before {
  content: "";
  width: 2rem;
  height: 1px;
  background: var(--color-accent-soft);
}

/* 左栏用「最大 40rem 的内容宽」+ 右栏占余下空间，避免 1.2fr 左轨很宽、标题却只有几 ch 时中间空一大块 */
.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, min(40rem, 100%)) minmax(0, 1fr);
  gap: var(--space-7);
  align-items: start;
}

.page-home .page-hero {
  padding-top: clamp(4rem, 9vw, 8rem);
}

.hero-title,
.page-title,
.section-title,
.card-title,
.feature-title,
.article-title,
.detail-title {
  font-family: "Manrope", "Helvetica Neue", Arial, sans-serif;
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.94;
}

.hero-title {
  font-size: clamp(3.4rem, 8vw, 5.5rem);
  /* 与下方 hero-body 同量级宽度，避免过窄 10ch 在左栏挤出大块中空 */
  max-width: min(40rem, 100%);
  margin: 0 0 var(--space-5);
}

.page-title {
  font-size: clamp(2.9rem, 7vw, 4.5rem);
  margin: 0 0 var(--space-4);
}

.hero-body,
.page-intro,
.lead-copy {
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
  color: var(--color-text-soft);
  max-width: 40rem;
}

.hero-points {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
  max-width: 38rem;
}

.hero-points li {
  display: grid;
  grid-template-columns: 0.7rem 1fr;
  gap: 0.8rem;
  align-items: start;
  color: var(--color-text-soft);
}

.hero-points li::before {
  content: "";
  width: 0.52rem;
  height: 0.52rem;
  margin-top: 0.5rem;
  border-radius: 999px;
  background: var(--color-accent);
  box-shadow: 0 0 0 6px rgba(99, 230, 255, 0.08);
}

.hero-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: var(--space-6);
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.95rem 1.3rem;
  background: var(--color-accent);
  color: var(--color-bg-elevated);
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(99, 230, 255, 0.18);
}

.button.is-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: rgba(176, 197, 227, 0.18);
}

.button.is-secondary:hover {
  background: rgba(255, 255, 255, 0.04);
  box-shadow: none;
}

.hero-visual {
  position: relative;
  min-height: 33rem;
}

.hero-sheet {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-5);
  height: 100%;
  padding: 1.7rem;
}

.hero-sheet-label {
  display: inline-flex;
  margin-bottom: var(--space-4);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-soft);
}

.hero-sheet-title {
  max-width: 12ch;
  margin: 0;
  font-family: "Manrope", "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.98;
}

.hero-sheet-copy {
  margin: var(--space-4) 0 0;
  max-width: 24rem;
  color: var(--color-text-soft);
}

.hero-sheet-list {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.hero-sheet-item {
  padding: 0.95rem 1rem;
  min-width: 0;
  border-radius: 1rem;
  border: 1px solid rgba(176, 197, 227, 0.08);
  background: rgba(9, 18, 29, 0.9);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.hero-sheet-item strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 1rem;
  overflow-wrap: anywhere;
}

.hero-sheet-item small {
  display: block;
  color: var(--color-text-soft);
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.hero-sheet-foot {
  padding-top: var(--space-3);
  border-top: 1px solid rgba(176, 197, 227, 0.08);
  color: var(--color-text-soft);
}

.ambient-panel {
  position: relative;
  height: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(99, 230, 255, 0.14);
  background:
    radial-gradient(circle at top right, rgba(99, 230, 255, 0.16), transparent 22%),
    linear-gradient(180deg, rgba(11, 22, 35, 0.96), rgba(9, 18, 29, 0.96));
  box-shadow: var(--shadow-soft);
}

.ambient-panel::before,
.ambient-panel::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(2px);
}

.ambient-panel::before {
  width: 18rem;
  height: 18rem;
  background: rgba(99, 230, 255, 0.08);
  top: -6rem;
  right: -3rem;
}

.ambient-panel::after {
  width: 15rem;
  height: 15rem;
  background: rgba(106, 166, 255, 0.12);
  bottom: -5rem;
  left: -3rem;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  opacity: 0.16;
  background-image:
    linear-gradient(to right, rgba(130, 180, 230, 0.12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(130, 180, 230, 0.12) 1px, transparent 1px);
  background-size: 72px 72px;
}

.floating-note {
  position: absolute;
  padding: 1.15rem 1.15rem 1rem;
  border-radius: 1.25rem;
  background: rgba(10, 21, 35, 0.88);
  border: 1px solid rgba(176, 197, 227, 0.08);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.floating-note strong,
.metric-card strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.floating-note small,
.metric-card small,
.meta-line,
.card-meta {
  display: block;
  color: var(--color-text-soft);
  font-size: 0.85rem;
}

.note-a {
  top: 2rem;
  right: 2rem;
  width: 12rem;
}

.note-b {
  left: 2rem;
  bottom: 2rem;
  width: 13.5rem;
}

.note-c {
  right: 5rem;
  bottom: 9rem;
  width: 10rem;
}

.proof-grid,
.pillar-grid,
.card-grid,
.feature-grid,
.stack-grid,
.principles-grid,
.legal-grid {
  display: grid;
  gap: 1.25rem;
}

.proof-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card,
.panel-card,
.article-card,
.project-card,
.stack-card,
.principle-card,
.legal-card,
.detail-panel {
  padding: 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(176, 197, 227, 0.08);
  background: rgba(10, 21, 35, 0.82);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
}

.metric-value {
  font-family: "Manrope", "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 0.92;
  letter-spacing: -0.05em;
  margin-bottom: 0.4rem;
  font-weight: 800;
  color: var(--color-accent);
}

.metric-head {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.7rem;
}

.metric-icon {
  width: 1rem;
  height: 1rem;
  color: var(--color-accent);
}

.metric-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-soft);
}

.metric-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.metric-card strong {
  margin-bottom: 0.05rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-6);
  align-items: end;
  margin-bottom: var(--space-7);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin: 0 0 var(--space-3);
}

.section-intro {
  max-width: 36rem;
  color: var(--color-text-soft);
}

.section-link {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.pillar-grid,
.card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel-card {
  min-height: 16rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-5);
}

.card-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.85rem;
  display: grid;
  place-items: center;
  background: rgba(99, 230, 255, 0.08);
  color: var(--color-accent);
}

.card-title,
.feature-title,
.article-title,
.detail-title {
  font-size: clamp(1.55rem, 3vw, 2rem);
  margin: 0 0 var(--space-3);
}

.card-copy,
.card-list,
.project-summary,
.feature-copy,
.article-summary,
.detail-copy,
.stack-copy,
.principle-copy {
  color: var(--color-text-soft);
}

.card-list {
  margin: 0;
  padding-left: 1rem;
}

.chips,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chip,
.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(176, 197, 227, 0.1);
  border-radius: 999px;
  padding: 0.45rem 0.78rem;
  background: rgba(255, 255, 255, 0.03);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  color: var(--color-text-soft);
}

.spotlight {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(290px, 0.72fr);
  gap: var(--space-7);
  align-items: start;
}

.spotlight-card {
  min-height: 100%;
}

.note-block {
  padding: 1.5rem;
  border-left: 2px solid var(--color-accent);
  background: rgba(99, 230, 255, 0.05);
}

.note-block p:last-child {
  margin-bottom: 0;
}

.journal-list,
.project-list,
.related-grid {
  display: grid;
  gap: 1.15rem;
}

.article-card,
.project-card,
.legal-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.project-card.is-portfolio-card {
  min-height: 19rem;
}

.product-showcase {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(0, 1.1fr);
  gap: var(--space-7);
  padding: 1.6rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(176, 197, 227, 0.08);
  background: rgba(10, 21, 35, 0.82);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.2);
}

.product-showcase + .product-showcase {
  margin-top: var(--space-6);
}

.product-copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.product-header {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

.product-icon {
  width: 5rem;
  height: 5rem;
  border-radius: 1.2rem;
  overflow: hidden;
  border: 1px solid rgba(176, 197, 227, 0.1);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  flex: 0 0 auto;
  background: rgba(255, 255, 255, 0.04);
}

.product-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-name {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
}

.product-kicker {
  margin: 0 0 0.25rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.product-lead {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 1.02rem;
}

.product-grid {
  display: grid;
  gap: 0.9rem;
}

.product-fact {
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(176, 197, 227, 0.08);
}

.product-fact strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.92rem;
  color: var(--color-text);
}

.product-fact span {
  display: block;
  color: var(--color-text-soft);
  line-height: 1.55;
}

/* 手机竖屏图：等比例、contain 显示整屏，避免首张「跨两行 + cover」造成裁切像被撕成两截。四图 2×2；五图首行 3 张、次行 2 张并居中。 */
.product-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  align-content: start;
}

/* 恰为 5 张时：3 + 2（底行两列在 6 列网格中居中） */
.product-gallery:has(> :nth-child(5):last-child) {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.product-gallery:has(> :nth-child(5):last-child) .product-shot {
  grid-column: span 2;
}

.product-gallery:has(> :nth-child(5):last-child) .product-shot:nth-child(4) {
  grid-column: 2 / span 2;
}

.product-gallery:has(> :nth-child(5):last-child) .product-shot:nth-child(5) {
  grid-column: 4 / span 2;
}

.product-shot {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 1.1rem;
  overflow: hidden;
  border: 1px solid rgba(176, 197, 227, 0.08);
  background: rgba(0, 0, 0, 0.22);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18);
  min-height: 0;
  padding: 0.4rem;
  box-sizing: border-box;
}

.product-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: min(32rem, 70vh);
  object-fit: contain;
  object-position: center;
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: var(--space-2);
}

.product-secondary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.article-meta,
.project-meta,
.detail-meta {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-soft);
}

.link-row {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--color-accent);
  font-weight: 700;
}

.split-columns {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: var(--space-8);
  align-items: start;
}

.stack-grid,
.principles-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stack-card h3,
.principle-card h3,
.legal-card h3,
.detail-panel h3 {
  margin: 0 0 var(--space-3);
  font-size: 1.08rem;
}

.stack-card ul,
.principle-card ul,
.legal-card ul,
.detail-panel ul {
  margin: 0;
  padding-left: 1rem;
  color: var(--color-text-soft);
}

.detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-7);
}

.prose {
  color: var(--color-text-soft);
  font-size: 1.03rem;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote {
  margin: 0 0 var(--space-5);
}

.prose h2,
.prose h3 {
  color: var(--color-text);
  font-family: "Manrope", "Helvetica Neue", Arial, sans-serif;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.prose h2 {
  font-size: clamp(1.85rem, 3vw, 2.5rem);
  margin: var(--space-8) 0 var(--space-4);
}

.prose h3 {
  font-size: 1.4rem;
  margin: var(--space-6) 0 var(--space-3);
}

.prose blockquote {
  margin-left: 0;
  padding: 1.2rem 1.4rem;
  border-left: 2px solid var(--color-accent);
  background: rgba(99, 230, 255, 0.05);
  color: var(--color-text);
}

.article-layout .prose .table-wrapper {
  margin: 0 0 1.5rem;
  overflow-x: auto;
  border: 1px solid rgba(176, 197, 227, 0.16);
  border-radius: 12px;
  background: rgba(6, 14, 24, 0.75);
}

.article-layout .prose table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.article-layout .prose th,
.article-layout .prose td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid rgba(176, 197, 227, 0.16);
  text-align: left;
  vertical-align: top;
}

.article-layout .prose thead th {
  color: var(--color-text);
  background: rgba(99, 230, 255, 0.08);
  font-weight: 700;
}

.article-layout .prose tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.meta-pill {
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(176, 197, 227, 0.08);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  color: var(--color-text-soft);
}

.article-layout {
  padding-top: var(--space-10);
}

.article-layout .page-title,
.detail-hero .page-title {
  max-width: min(24ch, 100%);
  line-height: 1;
  overflow-wrap: anywhere;
}

.article-layout .page-intro {
  max-width: min(58ch, 100%);
}

.article-layout .section:first-of-type {
  padding-top: var(--space-6);
}

.article-layout .prose pre {
  margin: 0 0 var(--space-5);
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(176, 197, 227, 0.12);
  background: var(--color-code-bg);
  overflow-x: auto;
}

.article-layout .prose code {
  font-family: "IBM Plex Mono", monospace;
}

.article-layout .prose p,
.article-layout .prose li {
  overflow-wrap: anywhere;
}

.article-layout .prose {
  max-width: 68ch;
  margin: 0 auto;
  font-size: clamp(1.02rem, 1.22vw, 1.14rem);
  line-height: 1.86;
}

.article-layout .prose p {
  margin: 0 0 1.25rem;
}

.article-layout .prose h2 {
  margin: 3rem 0 1rem;
  line-height: 1.08;
}

.article-layout .prose h3 {
  margin: 2rem 0 0.8rem;
  line-height: 1.14;
}

.article-layout .prose ul,
.article-layout .prose ol {
  margin: 0 0 1.35rem;
  padding-left: 1.3rem;
}

.article-layout .prose li + li {
  margin-top: 0.45rem;
}

.article-layout .prose blockquote {
  margin: 0 0 1.5rem;
  padding: 1rem 1.15rem;
  border-left-width: 3px;
}

.article-layout .prose img,
.article-layout .prose svg {
  display: block;
  width: 100%;
  height: auto;
}

.article-layout .prose figure {
  margin: 2rem 0;
  padding: 1rem;
  border: 1px solid rgba(176, 197, 227, 0.14);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.035);
}

.article-layout .prose figcaption {
  margin-top: 0.85rem;
  color: var(--color-text-muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.55;
}

.article-layout .prose .article-figure svg {
  color: var(--color-text);
}

.article-layout .prose hr {
  border: 0;
  border-top: 1px solid rgba(176, 197, 227, 0.2);
  margin: 2rem 0 1.5rem;
}

.article-layout .meta-strip {
  margin-top: 1.1rem;
}

.embla {
  overflow: hidden;
}

.embla__container {
  display: flex;
  gap: 1rem;
}

.embla__slide {
  min-width: min(100%, 24rem);
  flex: 0 0 min(100%, 24rem);
}

.carousel-card {
  height: 100%;
}

.project-card-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.project-accent {
  height: 0.9rem;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(99, 230, 255, 0.08), rgba(99, 230, 255, 0.46), rgba(106, 166, 255, 0.32));
}

.site-footer {
  border-top: 1px solid var(--color-rule);
  padding: var(--space-7) 0;
  background: rgba(8, 16, 25, 0.84);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-5);
  align-items: end;
}

.footer-copy {
  color: var(--color-text-soft);
  max-width: 32rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.95rem;
  justify-content: flex-end;
}

.footer-links a {
  color: var(--color-text-soft);
  font-size: 0.94rem;
}

.footer-links a:hover {
  color: var(--color-text);
}

.copyright {
  margin-top: var(--space-3);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-soft);
}

.contact-block {
  display: grid;
  gap: var(--space-4);
  padding: 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(176, 197, 227, 0.08);
  background: rgba(10, 21, 35, 0.82);
}

.contact-note {
  color: var(--color-text-soft);
}

.subtle-divider {
  height: 1px;
  background: var(--color-rule);
}

.legal-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.reveal {
  opacity: 1;
  transform: none;
}

.reveal.reveal-ready:not(.is-visible) {
  opacity: 0;
  transform: translateY(18px);
}

.reveal.reveal-ready.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 680ms ease, transform 680ms ease;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal.reveal-ready:not(.is-visible) {
    opacity: 1;
    transform: none;
  }
}

/* 注意：不要把 .hero-layout 写进下面的规则 —— 否则在常见笔电宽度 (≤1120px) 上首屏会一直是单栏，你看不到两栏与间距调整 */
@media (max-width: 1120px) {
  .product-showcase,
  .spotlight,
  .split-columns,
  .detail-grid,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 到更窄的视口才叠成单栏，避免 1000～1120 区间误以为「改 CSS 没效果」 */
@media (max-width: 960px) {
  .hero-layout {
    grid-template-columns: 1fr;
  }

  .hero-sheet-list {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 28rem;
  }
}

@media (max-width: 860px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    gap: 1rem 1.25rem;
  }

  .pillar-grid,
  .card-grid,
  .product-secondary-grid,
  .stack-grid,
  .principles-grid,
  .legal-grid {
    grid-template-columns: 1fr;
  }

  .section-header {
    flex-direction: column;
    align-items: start;
  }

  .hero-title,
  .page-title {
    max-width: none;
  }
}

@media (max-width: 640px) {
  body::before {
    background-size: 44px 44px;
  }

  .shell,
  .shell-read {
    width: min(calc(100% - 1.2rem), var(--shell-wide));
  }

  .section,
  .page-hero {
    padding-top: var(--space-8);
  }

  .hero-actions,
  .inline-actions,
  .footer-links {
    align-items: stretch;
  }

  .button {
    width: 100%;
    justify-content: center;
  }

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

  .hero-visual {
    min-height: 22rem;
  }

  .product-gallery:has(> :nth-child(5):last-child) {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-gallery:has(> :nth-child(5):last-child) .product-shot,
  .product-gallery:has(> :nth-child(5):last-child) .product-shot:nth-child(4),
  .product-gallery:has(> :nth-child(5):last-child) .product-shot:nth-child(5) {
    grid-column: auto;
  }

  .product-gallery {
    grid-template-columns: 1fr;
  }

  .product-shot img {
    max-height: min(28rem, 60vh);
  }

  .note-a,
  .note-b,
  .note-c {
    width: auto;
    max-width: 12rem;
  }

  .note-a {
    top: 1rem;
    right: 1rem;
  }

  .note-b {
    left: 1rem;
    bottom: 1rem;
  }

  .note-c {
    right: 1.5rem;
    bottom: 7rem;
  }

  .article-layout .prose .table-wrapper {
    margin: 0 0 1.2rem;
  }

  .article-layout .prose table {
    min-width: 560px;
    font-size: 0.92rem;
  }

  .article-layout .prose th,
  .article-layout .prose td {
    padding: 0.62rem 0.68rem;
  }
}