/* ==========================================================================
   内页：页面头、项目、教育、资源、合作、关于
   ========================================================================== */

/* --------------------------------------------------------------------------
   Page hero
   -------------------------------------------------------------------------- */

.page-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(58px, 9vh, 108px));
  padding-bottom: clamp(54px, 7vw, 88px);
  background: var(--ink);
  color: var(--paper);
}

.page-hero--compact {
  padding-top: calc(var(--header-h) + clamp(44px, 7vh, 80px));
  padding-bottom: clamp(42px, 5vw, 66px);
}

.page-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 85% 90% at 40% 30%, #000, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 85% 90% at 40% 30%, #000, transparent 80%);
  pointer-events: none;
}

.page-hero__glow {
  position: absolute;
  top: -20%;
  right: -8%;
  width: 52vw;
  height: 52vw;
  max-width: 780px;
  max-height: 780px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 90, 31, 0.16), transparent 66%);
  pointer-events: none;
}

.page-hero__shell {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: clamp(28px, 4vw, 48px);
  color: rgba(255, 255, 255, 0.52);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.breadcrumb a {
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--orange);
}

.breadcrumb .icon {
  font-size: 10px;
  opacity: 0.5;
}

.page-hero__grid-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(280px, 0.62fr);
  gap: clamp(36px, 6vw, 90px);
  align-items: end;
}

.page-hero__title {
  max-width: 900px;
  color: var(--paper);
  font-size: clamp(50px, 7.4vw, 106px);
  font-weight: 700;
  letter-spacing: -0.065em;
  line-height: 0.99;
  text-wrap: balance;
}

.page-hero__title em {
  color: var(--orange);
  font-style: normal;
}

.page-hero__title .outline {
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.45);
}

.page-hero__lead {
  max-width: 620px;
  margin-top: clamp(20px, 2.6vw, 30px);
  color: rgba(255, 255, 255, 0.56);
  font-size: clamp(14px, 1.25vw, 16px);
  line-height: 1.9;
}

.page-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 34px;
  margin-top: clamp(30px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
  color: rgba(255, 255, 255, 0.56);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.09em;
}

.page-hero__meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-hero__meta span::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--orange);
}

.schematic {
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.025);
  padding: 15px;
}

.schematic::before,
.schematic::after {
  content: "";
  position: absolute;
  width: 9px;
  height: 9px;
  border-color: var(--orange);
  border-style: solid;
}

.schematic::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.schematic::after {
  right: -1px;
  bottom: -1px;
  border-width: 0 1px 1px 0;
}

.schematic__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 3px 3px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.34);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.12em;
}

.schematic__top span:last-child {
  color: var(--orange);
}

.schematic__body {
  position: relative;
  display: grid;
  min-height: 218px;
  place-items: center;
  padding: 16px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 26px 26px;
}

.schematic__body svg {
  width: min(100%, 230px);
  height: auto;
  color: rgba(255, 255, 255, 0.68);
}

.schematic__body .accent {
  color: var(--orange);
}

.schematic__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 3px 2px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.3);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.08em;
}

.schematic__foot b {
  color: rgba(255, 255, 255, 0.6);
  font-weight: 400;
}

/* --------------------------------------------------------------------------
   Shared page blocks
   -------------------------------------------------------------------------- */

.page-section {
  padding: clamp(68px, 8vw, 118px) 0;
}

.page-section--tight {
  padding: clamp(52px, 6vw, 82px) 0;
}

.page-section--dark {
  background: var(--ink);
  color: var(--paper);
}

.page-section--paper-2 {
  background: var(--paper-2);
}

.page-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(32px, 6vw, 92px);
  align-items: start;
}

.page-intro__copy {
  padding-top: 8px;
}

.page-intro__copy p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.95;
}

.page-intro__copy p + p {
  margin-top: 16px;
}

.page-intro__copy strong {
  color: var(--ink);
  font-weight: 600;
}

.page-intro__aside {
  max-width: 420px;
  justify-self: end;
}

.stat-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.stat-bar--dark {
  border-color: var(--line-dark);
}

.stat-bar__item {
  padding: 24px 20px;
  border-right: 1px solid var(--line);
}

.stat-bar--dark .stat-bar__item {
  border-color: var(--line-dark);
}

.stat-bar__item:first-child {
  padding-left: 0;
}

.stat-bar__item:last-child {
  border-right: 0;
}

.stat-bar__item strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-en);
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
}

.stat-bar--dark .stat-bar__item strong {
  color: var(--paper);
}

.stat-bar__item strong em {
  color: var(--orange-deep);
  font-family: var(--font-sans);
  font-size: 11px;
  font-style: normal;
  font-weight: 500;
}

.stat-bar--dark .stat-bar__item strong em {
  color: var(--orange);
}

.stat-bar__item p {
  margin-top: 9px;
  color: var(--muted);
  font-size: 11px;
}

.stat-bar--dark .stat-bar__item p {
  color: rgba(255, 255, 255, 0.42);
}

/* --------------------------------------------------------------------------
   Filter bar / chips
   -------------------------------------------------------------------------- */

.filter-bar {
  position: sticky;
  top: var(--header-h);
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(244, 241, 234, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  gap: 7px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.chip:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}

.chip.is-active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.chip span {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8px;
}

.chip.is-active span {
  color: rgba(255, 255, 255, 0.68);
}

.filter-result {
  flex: none;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.07em;
}

.filter-result b {
  color: var(--ink);
  font-weight: 500;
}

.search-field {
  position: relative;
  display: flex;
  min-width: 260px;
  align-items: center;
  gap: 9px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--white);
}

.search-field .icon {
  color: var(--muted-2);
  font-size: 15px;
}

.search-field input {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 12px;
  outline: none;
}

.search-field input::placeholder {
  color: var(--muted-2);
}

.empty-state {
  display: grid;
  min-height: 220px;
  place-items: center;
  border: 1px dashed var(--line-strong);
  color: var(--muted);
  text-align: center;
}

.empty-state strong {
  display: block;
  color: var(--ink);
  font-size: 18px;
}

.empty-state p {
  margin-top: 6px;
  font-size: 12px;
}

/* --------------------------------------------------------------------------
   Project cards
   -------------------------------------------------------------------------- */

.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 32px;
}

.project-card {
  position: relative;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
  transition: border-color 0.3s ease, transform 0.35s var(--ease), box-shadow 0.35s ease;
}

.project-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-5px);
  box-shadow: 0 24px 54px rgba(11, 14, 21, 0.1);
}

.project-card.is-hidden {
  display: none;
}

.project-card__visual {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--ink-2);
}

.project-card__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.04);
  transition: transform 0.7s var(--ease), filter 0.4s ease;
}

.project-card:hover .project-card__visual img {
  transform: scale(1.035);
  filter: saturate(0.98) contrast(1.02);
}

.project-card__visual--diagram {
  display: grid;
  place-items: center;
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    var(--ink-2);
  background-size: 32px 32px;
}

.project-card__visual--diagram svg {
  width: 58%;
  height: auto;
  color: rgba(255, 255, 255, 0.72);
}

.project-card__visual--diagram .accent {
  color: var(--orange);
}

.project-card__badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 8px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(11, 14, 21, 0.55);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.06em;
  backdrop-filter: blur(6px);
}

.project-card__year {
  position: absolute;
  right: 14px;
  bottom: 12px;
  color: rgba(255, 255, 255, 0.62);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.project-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 23px 24px 22px;
}

.project-card__title {
  font-size: clamp(20px, 2vw, 25px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.35;
}

.project-card__desc {
  max-width: 530px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}

.project-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: auto;
  padding-top: 20px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.tag-list span {
  padding: 4px 7px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.03em;
}

.project-card__open {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 7px;
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
}

.project-card__open .icon {
  color: var(--orange-deep);
  font-size: 14px;
  transition: transform 0.25s var(--ease);
}

.project-card:hover .project-card__open .icon {
  transform: translate(2px, -2px);
}

/* --------------------------------------------------------------------------
   Case dialog
   -------------------------------------------------------------------------- */

.case-dialog {
  width: min(1020px, calc(100vw - 40px));
  max-width: none;
  max-height: min(88vh, 920px);
  padding: 0;
  border: 0;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 32px 100px rgba(0, 0, 0, 0.35);
}

.case-dialog::backdrop {
  background: rgba(5, 7, 11, 0.76);
  backdrop-filter: blur(7px);
}

.case-dialog__inner {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  max-height: inherit;
}

.case-dialog__media {
  position: relative;
  min-height: 480px;
  overflow: hidden;
  background: var(--ink);
}

.case-dialog__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.05);
}

.case-dialog__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(11, 14, 21, 0.7));
}

.case-dialog__media-label {
  position: absolute;
  z-index: 2;
  right: 18px;
  bottom: 18px;
  left: 18px;
  color: rgba(255, 255, 255, 0.64);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.case-dialog__body {
  position: relative;
  overflow-y: auto;
  padding: clamp(26px, 4vw, 44px);
}

.case-dialog__close {
  position: absolute;
  z-index: 4;
  top: 14px;
  right: 14px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  transition: background 0.2s ease, color 0.2s ease;
}

.case-dialog__close:hover {
  background: var(--ink);
  color: var(--paper);
}

.case-dialog__close .icon {
  font-size: 16px;
}

.case-dialog__eyebrow {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.case-dialog__title {
  margin-top: 8px;
  padding-right: 30px;
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.18;
}

.case-dialog__summary {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.case-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 24px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.case-meta div {
  padding: 11px 12px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.case-meta dt {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.08em;
}

.case-meta dd {
  margin-top: 4px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 500;
}

.case-section {
  margin-top: 24px;
}

.case-section h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.case-section h4::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--orange);
}

.case-section p,
.case-section li {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}

.case-section p {
  margin-top: 8px;
}

.case-section ul {
  margin-top: 8px;
}

.case-section li {
  position: relative;
  padding-left: 13px;
}

.case-section li + li {
  margin-top: 4px;
}

.case-section li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 4px;
  height: 1px;
  background: var(--orange);
}

.case-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 10px;
  border: 1px solid var(--line);
  background: var(--line);
}

.case-results div {
  padding: 12px;
  background: var(--white);
}

.case-results strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
}

.case-results span {
  display: block;
  margin-top: 5px;
  color: var(--muted-2);
  font-size: 8.5px;
  line-height: 1.4;
}

.case-dialog__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

/* --------------------------------------------------------------------------
   Audience tabs (education / cooperation)
   -------------------------------------------------------------------------- */

.audience-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.audience-tab {
  position: relative;
  display: flex;
  min-height: 86px;
  align-items: center;
  gap: 13px;
  padding: 16px 18px;
  border-right: 1px solid var(--line);
  color: var(--muted);
  text-align: left;
  transition: background 0.25s ease, color 0.25s ease;
}

.audience-tab:last-child {
  border-right: 0;
}

.audience-tab span {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 9px;
}

.audience-tab strong {
  font-size: 14px;
  font-weight: 600;
}

.audience-tab::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transition: transform 0.3s var(--ease);
}

.audience-tab:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.24);
}

.audience-tab[aria-selected="true"] {
  background: var(--ink);
  color: var(--paper);
}

.audience-tab[aria-selected="true"] span {
  color: var(--orange);
}

.audience-tab[aria-selected="true"]::after {
  transform: scaleX(1);
}

.audience-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(32px, 5vw, 72px);
  padding-top: clamp(34px, 4vw, 52px);
}

.audience-panel__lead .display {
  max-width: 500px;
  font-size: clamp(30px, 3.5vw, 46px);
}

.audience-panel__lead p {
  max-width: 440px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}

.audience-panel__lead .btn {
  margin-top: 24px;
}

.audience-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.audience-fact {
  padding: 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.audience-fact dt {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.audience-fact dd {
  margin-top: 7px;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.6;
}

.audience-fact dd strong {
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Education stages / methods
   -------------------------------------------------------------------------- */

.stage-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 36px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.stage-card {
  position: relative;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 20px;
  padding: 26px 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background 0.3s ease;
}

.stage-card:hover {
  background: var(--white);
}

.stage-card__num {
  color: transparent;
  -webkit-text-stroke: 1px var(--line-strong);
  font-family: var(--font-en);
  font-size: 46px;
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.9;
}

.stage-card:hover .stage-card__num {
  color: var(--orange);
  -webkit-text-stroke: 0;
}

.stage-card__body h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.stage-card__body h3 span {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8.5px;
  font-weight: 400;
  letter-spacing: 0.04em;
}

.stage-card__body p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.75;
}

.stage-card__out {
  margin-top: 14px;
  padding-top: 11px;
  border-top: 1px solid var(--line);
  color: var(--muted-2);
  font-size: 10.5px;
  line-height: 1.65;
}

.stage-card__out b {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.stage-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 11px;
}

.stage-tags span {
  padding: 3px 6px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 7.5px;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 34px;
}

.method-card {
  padding: 25px 23px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.method-card__num {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 9px;
}

.method-card h3 {
  margin-top: 44px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.method-card p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}

.delivery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 34px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.delivery-card {
  padding: 22px 20px;
  border-right: 1px solid var(--line);
}

.delivery-card:first-child {
  padding-left: 0;
}

.delivery-card:last-child {
  border-right: 0;
}

.delivery-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.07em;
}

.delivery-card h3 {
  margin-top: 30px;
  font-size: 18px;
  font-weight: 600;
}

.delivery-card p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.75;
}

.delivery-card strong {
  display: block;
  margin-top: 12px;
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* --------------------------------------------------------------------------
   Resources
   -------------------------------------------------------------------------- */

.resource-toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.resource-toolbar__left {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.resource-toolbar .search-field {
  width: 320px;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.resource-card {
  display: flex;
  min-height: 288px;
  flex-direction: column;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--white);
  transition: border-color 0.25s ease, transform 0.3s var(--ease), box-shadow 0.3s ease;
}

.resource-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-4px);
  box-shadow: 0 20px 44px rgba(11, 14, 21, 0.07);
}

.resource-card.is-hidden {
  display: none;
}

.resource-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.resource-type {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 7px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.06em;
}

.resource-type::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--orange);
}

.resource-type--code::before {
  background: #4f7cff;
}

.resource-type--manual::before {
  background: #1e8e5a;
}

.resource-type--data::before {
  background: #b97919;
}

.resource-format {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.04em;
}

.resource-card__title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.45;
}

.resource-card__desc {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.resource-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 14px;
}

.resource-tags span {
  padding: 3px 6px;
  background: var(--paper);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 7px;
  letter-spacing: 0.03em;
}

.resource-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.resource-meta {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 7.5px;
  line-height: 1.5;
}

.resource-download {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  font-size: 10.5px;
  font-weight: 600;
}

.resource-download .icon {
  color: var(--orange-deep);
  font-size: 14px;
  transition: transform 0.2s ease;
}

.resource-download:hover .icon {
  transform: translateY(2px);
}

.resource-card.is-hidden {
  display: none;
}

.resource-empty {
  display: none;
  margin-top: 28px;
}

.resource-empty.is-visible {
  display: grid;
}

.license-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 68px);
  margin-top: 48px;
  padding: clamp(26px, 3.5vw, 38px);
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.license-panel h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.license-panel__text {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.85;
}

.license-panel__text p + p {
  margin-top: 9px;
}

.license-panel__text strong {
  color: var(--ink);
  font-weight: 600;
}

.contribute-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 32px;
}

.contribute-card {
  padding: 24px 22px;
  border-top: 2px solid var(--ink);
  background: var(--paper);
}

.contribute-card span {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 9px;
}

.contribute-card h3 {
  margin-top: 28px;
  font-size: 19px;
  font-weight: 600;
}

.contribute-card p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.resource-update {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.resource-update p {
  color: var(--muted);
  font-size: 12px;
}

.resource-update code {
  padding: 3px 6px;
  background: var(--paper-2);
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 10px;
}

/* --------------------------------------------------------------------------
   Cooperation
   -------------------------------------------------------------------------- */

.solution-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.solution-tab {
  scroll-margin-top: calc(var(--header-h) + 24px);
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 15px 20px;
  border-right: 1px solid var(--line);
  color: var(--muted);
  text-align: left;
  transition: background 0.25s ease, color 0.25s ease;
}

.solution-tab:last-child {
  border-right: 0;
}

.solution-tab span {
  font-family: var(--font-mono);
  font-size: 8px;
}

.solution-tab strong {
  display: block;
  margin-top: 3px;
  font-size: 16px;
  font-weight: 600;
}

.solution-tab .icon {
  color: var(--muted-2);
  font-size: 16px;
}

.solution-tab[aria-selected="true"] {
  background: var(--ink);
  color: var(--paper);
}

.solution-tab[aria-selected="true"] .icon {
  color: var(--orange);
}

.solution-panel {
  padding-top: clamp(30px, 4vw, 48px);
}

.solution-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(30px, 5vw, 70px);
  align-items: end;
  margin-bottom: 30px;
}

.solution-intro .display {
  max-width: 560px;
  font-size: clamp(30px, 3.8vw, 48px);
}

.solution-intro p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.9;
}

.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.solution-card {
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--white);
}

.solution-card__num {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 9px;
}

.solution-card h3 {
  margin-top: 27px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.solution-card p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}

.solution-card ul {
  margin-top: 16px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
}

.solution-card li {
  position: relative;
  padding-left: 13px;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.8;
}

.solution-card li::before {
  content: "";
  position: absolute;
  top: 0.78em;
  left: 0;
  width: 4px;
  height: 1px;
  background: var(--orange);
}

.model-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 34px;
}

.model-card {
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--paper);
}

.model-card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 15px;
}

.model-card__head span {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 9px;
}

.model-card__head em {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8px;
  font-style: normal;
  letter-spacing: 0.04em;
}

.model-card h3 {
  margin-top: 34px;
  font-size: clamp(21px, 2.2vw, 26px);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.model-card p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}

.model-card__specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 20px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.model-card__specs div {
  padding: 11px 12px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.model-card__specs dt {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.06em;
}

.model-card__specs dd {
  margin-top: 4px;
  color: var(--ink);
  font-size: 11.5px;
}

.model-card__link {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
}

.model-card__link .icon {
  color: var(--orange-deep);
  font-size: 13px;
}

.process-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin-top: 34px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.process-step {
  position: relative;
  padding: 23px 18px;
  border-right: 1px solid var(--line);
}

.process-step:first-child {
  padding-left: 0;
}

.process-step:last-child {
  border-right: 0;
}

.process-step__num {
  display: inline-flex;
  width: 25px;
  height: 25px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 8px;
}

.process-step h3 {
  margin-top: 24px;
  font-size: 16px;
  font-weight: 600;
}

.process-step p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 32px;
}

.scope-card {
  padding: 24px;
  border-top: 2px solid var(--line-strong);
  background: var(--paper);
}

.scope-card--do {
  border-color: var(--orange);
}

.scope-card h3 {
  font-size: 17px;
  font-weight: 600;
}

.scope-card p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.scope-card ul {
  margin-top: 15px;
}

.scope-card li {
  position: relative;
  padding-left: 14px;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.8;
}

.scope-card li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--orange-deep);
  font-weight: 700;
}

.contact-section {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
}

.contact-section__glow {
  position: absolute;
  right: -10%;
  bottom: -30%;
  width: 55vw;
  height: 55vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 90, 31, 0.18), transparent 65%);
  pointer-events: none;
}

.contact-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(38px, 6vw, 92px);
  align-items: start;
}

.contact-copy .display {
  max-width: 520px;
  color: var(--paper);
  font-size: clamp(36px, 4.8vw, 62px);
}

.contact-copy > p {
  max-width: 430px;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 14px;
  line-height: 1.9;
}

.contact-details {
  margin-top: 34px;
  border-top: 1px solid var(--line-dark);
}

.contact-detail {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-dark);
}

.contact-detail dt {
  color: var(--muted-dark);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.contact-detail dd {
  color: rgba(255, 255, 255, 0.66);
  font-size: 12.5px;
  line-height: 1.7;
}

.contact-detail dd a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--orange);
}

.contact-detail dd .icon {
  font-size: 12px;
}

.contact-form-wrap .form-card {
  background: var(--paper);
}

.contact-form-wrap .field input,
.contact-form-wrap .field select,
.contact-form-wrap .field textarea {
  background: var(--white);
}

.contact-form-wrap .field input:focus,
.contact-form-wrap .field select:focus,
.contact-form-wrap .field textarea:focus {
  background: var(--white);
}

.contact-response {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  padding: 12px 14px;
  border: 1px solid var(--line-dark);
  color: var(--muted-dark);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.06em;
}

.contact-response i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
  animation: pulse 2.6s ease-in-out infinite;
}

/* --------------------------------------------------------------------------
   FAQ accordion
   -------------------------------------------------------------------------- */

.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(34px, 6vw, 100px);
  align-items: start;
}

.faq-aside {
  position: sticky;
  top: calc(var(--header-h) + 30px);
}

.faq-aside .display {
  font-size: clamp(34px, 4.4vw, 54px);
}

.faq-aside p {
  max-width: 330px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.faq-aside a {
  color: var(--orange-deep);
  font-weight: 600;
}

.accordion {
  border-top: 1px solid var(--line-strong);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-question {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
}

.faq-question:hover {
  color: var(--orange-deep);
}

.faq-icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex: none;
  border: 1px solid var(--line);
  color: var(--muted);
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 1px;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform 0.25s ease;
}

.faq-item.is-open .faq-icon {
  border-color: var(--orange);
  background: var(--orange);
  color: var(--ink);
}

.faq-item.is-open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(0);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s var(--ease);
}

.faq-answer > div {
  overflow: hidden;
}

.faq-answer p {
  max-width: 720px;
  padding: 0 0 20px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.faq-item.is-open .faq-answer {
  grid-template-rows: 1fr;
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */

.about-story {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(36px, 6vw, 92px);
  align-items: center;
}

.about-story__visual {
  position: relative;
}

.about-story__visual img {
  width: 100%;
  aspect-ratio: 4 / 3.4;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.03);
}

.about-story__visual::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  pointer-events: none;
}

.about-story__caption {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 12px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
}

.about-story__copy .display {
  font-size: clamp(32px, 4.2vw, 54px);
}

.about-story__copy p {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.95;
}

.about-story__copy strong {
  color: var(--ink);
  font-weight: 600;
}

.about-quote {
  margin-top: 28px;
  padding: 20px 22px;
  border-left: 3px solid var(--orange);
  background: var(--paper-2);
  color: var(--ink);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.7;
}

.timeline {
  position: relative;
  margin-top: 34px;
  border-top: 1px solid var(--line-strong);
}

.timeline__item {
  display: grid;
  grid-template-columns: 120px 1fr minmax(160px, 0.6fr);
  gap: 24px;
  align-items: start;
  padding: 21px 0;
  border-bottom: 1px solid var(--line);
}

.timeline__year {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.timeline__title {
  font-size: 16px;
  font-weight: 600;
}

.timeline__desc {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
  text-align: right;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 32px;
}

.value-card {
  padding: 25px 23px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.value-card__num {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 9px;
}

.value-card h3 {
  margin-top: 42px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.value-card p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 34px;
}

.gallery figure {
  position: relative;
  overflow: hidden;
  background: var(--ink);
}

.gallery img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.76) contrast(1.03);
  transition: transform 0.6s var(--ease);
}

.gallery figure:hover img {
  transform: scale(1.035);
}

.gallery figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 58%, rgba(11, 14, 21, 0.62));
  pointer-events: none;
}

.gallery figcaption {
  position: absolute;
  z-index: 2;
  right: 12px;
  bottom: 10px;
  left: 12px;
  color: rgba(255, 255, 255, 0.78);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.05em;
}

.capability {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(34px, 6vw, 90px);
}

.capability-list {
  border-top: 1px solid var(--line-strong);
}

.capability-item {
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.capability-item__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
}

.capability-item h3 {
  font-size: 14px;
  font-weight: 600;
}

.capability-item span {
  color: var(--muted-dark);
  font-family: var(--font-mono);
  font-size: 8px;
}

.capability-bar {
  height: 4px;
  margin-top: 10px;
  background: var(--paper-3);
}

.capability-bar i {
  display: block;
  height: 100%;
  background: var(--orange);
}

.base-card {
  padding: 26px;
  border: 1px solid var(--line-dark);
  background: rgba(255, 255, 255, 0.025);
}

.base-card__label {
  color: rgba(255, 255, 255, 0.52);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.1em;
}

.base-card h3 {
  margin-top: 18px;
  color: var(--paper);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.base-card p {
  margin-top: 9px;
  color: rgba(255, 255, 255, 0.46);
  font-size: 12px;
  line-height: 1.8;
}

.base-card__coords {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--line-dark);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.06em;
}

/* --------------------------------------------------------------------------
   Inner responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1120px) {
  .page-hero__grid-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(250px, 0.6fr);
  }

  .project-grid {
    gap: 14px;
  }

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

  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-step:nth-child(3) {
    border-right: 0;
  }

  .process-step:nth-child(-n + 3) {
    border-bottom: 1px solid var(--line);
  }

  .timeline__item {
    grid-template-columns: 90px 1fr minmax(150px, 0.6fr);
  }
}

@media (max-width: 960px) {
  .page-hero__grid-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    align-items: start;
  }

  .page-hero__title {
    font-size: clamp(46px, 9vw, 84px);
  }

  .schematic {
    width: min(100%, 420px);
  }

  .schematic__body {
    min-height: 150px;
  }

  .page-intro,
  .audience-panel,
  .license-panel,
  .contact-grid,
  .faq-grid,
  .about-story,
  .capability {
    grid-template-columns: 1fr;
  }

  .page-intro__aside {
    max-width: none;
    justify-self: start;
  }

  .stat-bar {
    grid-template-columns: 1fr 1fr;
  }

  .stat-bar__item:nth-child(2) {
    border-right: 0;
  }

  .stat-bar__item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .stat-bar__item:nth-child(3) {
    padding-left: 0;
  }

  .stat-bar--dark .stat-bar__item:nth-child(-n + 2) {
    border-bottom-color: var(--line-dark);
  }

  .filter-bar {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .filter-result {
    align-self: flex-end;
  }

  .resource-toolbar {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }

  .resource-toolbar .search-field {
    width: 100%;
  }

  .audience-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .audience-tab:nth-child(2) {
    border-right: 0;
  }

  .audience-tab:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .solution-tabs {
    grid-template-columns: 1fr;
  }

  .solution-tab {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .solution-tab:last-child {
    border-bottom: 0;
  }

  .solution-intro {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .stage-card {
    border-right: 1px solid var(--line);
  }

  .method-grid,
  .delivery-grid,
  .contribute-grid,
  .value-grid,
  .scope-grid {
    grid-template-columns: 1fr 1fr;
  }

  .delivery-card:nth-child(2) {
    border-right: 0;
  }

  .delivery-card:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .delivery-card:nth-child(3) {
    padding-left: 0;
  }

  .method-card:last-child,
  .contribute-card:last-child,
  .value-card:last-child,
  .scope-card:last-child {
    grid-column: 1 / -1;
  }

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

  .process-timeline {
    grid-template-columns: 1fr 1fr;
  }

  .process-step:nth-child(2n) {
    border-right: 0;
  }

  .process-step:nth-child(3) {
    border-right: 1px solid var(--line);
  }

  .process-step:nth-child(-n + 4) {
    border-bottom: 1px solid var(--line);
  }

  .faq-aside {
    position: static;
  }

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

  .timeline__item {
    grid-template-columns: 80px 1fr;
  }

  .timeline__desc {
    grid-column: 2;
    text-align: left;
  }

  .case-dialog__inner {
    grid-template-columns: 1fr;
  }

  .case-dialog__media {
    min-height: 220px;
    max-height: 260px;
  }

  .case-dialog__body {
    max-height: calc(88vh - 240px);
  }
}

@media (max-width: 640px) {
  .page-hero {
    padding-top: calc(var(--header-h) + 43px);
    padding-bottom: 44px;
  }

  .breadcrumb {
    margin-bottom: 25px;
  }

  .page-hero__title {
    font-size: clamp(40px, 11.5vw, 60px);
    letter-spacing: -0.05em;
  }

  .page-hero__lead {
    margin-top: 17px;
    font-size: 13.5px;
  }

  .page-hero__meta {
    margin-top: 25px;
    gap: 10px 18px;
    font-size: 7.5px;
  }

  .schematic {
    display: none;
  }

  .stat-bar__item {
    padding: 18px 12px;
  }

  .stat-bar__item strong {
    font-size: 27px;
  }

  .stat-bar__item p {
    font-size: 9.5px;
  }

  .filter-bar {
    position: static;
  }

  .chips {
    gap: 5px;
  }

  .chip {
    min-height: 32px;
    padding: 0 9px;
    font-size: 10.5px;
  }

  .project-grid {
    grid-template-columns: 1fr;
    margin-top: 24px;
  }

  .project-card__body {
    padding: 19px 18px 18px;
  }

  .project-card__foot {
    align-items: flex-start;
    flex-direction: column;
    gap: 13px;
  }

  .audience-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .audience-tab {
    min-height: 72px;
    padding: 12px;
  }

  .audience-tab strong {
    font-size: 12.5px;
  }

  .audience-facts {
    grid-template-columns: 1fr;
  }

  .stage-card {
    grid-template-columns: 48px 1fr;
    gap: 14px;
    padding: 20px 16px;
  }

  .stage-card__num {
    font-size: 34px;
  }

  .stage-card__body h3 {
    font-size: 18px;
  }

  .method-grid,
  .delivery-grid,
  .contribute-grid,
  .value-grid,
  .scope-grid {
    grid-template-columns: 1fr;
  }

  .method-card:last-child,
  .contribute-card:last-child,
  .value-card:last-child,
  .scope-card:last-child {
    grid-column: auto;
  }

  .delivery-card {
    padding: 18px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .delivery-card:last-child {
    border-bottom: 0;
  }

  .delivery-card:nth-child(2) {
    border-bottom: 1px solid var(--line);
  }

  .delivery-card h3 {
    margin-top: 18px;
  }

  .resource-grid {
    grid-template-columns: 1fr;
    margin-top: 22px;
  }

  .resource-card {
    min-height: 0;
  }

  .license-panel {
    padding: 20px;
  }

  .resource-update {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

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

  .model-card__specs {
    grid-template-columns: 1fr;
  }

  .process-timeline {
    grid-template-columns: 1fr;
  }

  .process-step {
    padding: 18px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .process-step:nth-child(3) {
    border-right: 0;
  }

  .process-step:last-child {
    border-bottom: 0;
  }

  .contact-copy .display {
    font-size: clamp(34px, 9vw, 48px);
  }

  .contact-detail {
    grid-template-columns: 64px 1fr;
    gap: 10px;
  }

  .form-card {
    padding: 22px 18px;
  }

  .form-head {
    flex-direction: column;
    gap: 10px;
  }

  .form-foot {
    align-items: stretch;
    flex-direction: column;
  }

  .form-foot .btn {
    width: 100%;
  }

  .faq-question {
    padding: 17px 0;
    font-size: 14px;
  }

  .about-story__copy .display {
    font-size: clamp(30px, 8.5vw, 42px);
  }

  .timeline__item {
    grid-template-columns: 62px 1fr;
    gap: 13px;
    padding: 17px 0;
  }

  .timeline__desc {
    font-size: 11px;
  }

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

  .case-dialog {
    width: calc(100vw - 20px);
    max-height: 92vh;
  }

  .case-dialog__media {
    min-height: 180px;
    max-height: 200px;
  }

  .case-dialog__body {
    max-height: calc(92vh - 200px);
    padding: 22px 18px;
  }

  .case-meta {
    grid-template-columns: 1fr;
  }

  .case-results {
    grid-template-columns: 1fr;
  }
}


/* --------------------------------------------------------------------------
   Case diagram / consent / small refinements
   -------------------------------------------------------------------------- */

.case-dialog__diagram {
  display: grid;
  width: 100%;
  height: 100%;
  min-height: 480px;
  place-items: center;
  padding: 34px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    var(--ink);
  background-size: 34px 34px;
}

.case-dialog__diagram svg {
  width: min(100%, 330px);
  height: auto;
  color: rgba(255, 255, 255, 0.74);
}

.consent {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 4px 0 16px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
}

.consent input {
  width: 14px;
  height: 14px;
  margin-top: 2px;
  flex: none;
  accent-color: var(--orange);
}

.consent a {
  color: var(--orange-deep);
  border-bottom: 1px solid currentColor;
}

.consent.has-error {
  color: #b42318;
}

.case-dialog .tag-list {
  margin-top: 10px;
}

@media (max-width: 960px) {
  .case-dialog__diagram {
    min-height: 220px;
    padding: 18px;
  }
}


.copy-address {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.copy-address .icon {
  font-size: 14px;
}

@media (max-width: 640px) {
  .solution-tab {
    min-height: 66px;
    padding: 12px 14px;
  }

  .solution-tab strong {
    font-size: 14px;
  }
}

/* --------------------------------------------------------------------------
   Legal / privacy
   -------------------------------------------------------------------------- */

.legal {
  max-width: 840px;
  margin: 0 auto;
}

.legal__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.06em;
}

.legal h2 {
  margin-top: 42px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 600;
  letter-spacing: -0.025em;
}

.legal h3 {
  margin-top: 26px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.legal p,
.legal li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.95;
}

.legal p {
  margin-top: 14px;
}

.legal ul {
  margin-top: 12px;
  padding-left: 1.15em;
  list-style: disc;
}

.legal li + li {
  margin-top: 6px;
}

.legal p a,
.legal li a {
  color: var(--orange-deep);
  border-bottom: 1px solid currentColor;
}

.legal .btn {
  border-bottom: 0;
}

.legal .legal__note {
  margin-top: 34px;
  padding: 18px 20px;
  border-left: 3px solid var(--orange);
  background: var(--paper-2);
  color: var(--ink);
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   External open-source ecosystem
   -------------------------------------------------------------------------- */

.oss-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.oss-card {
  display: flex;
  min-height: 242px;
  flex-direction: column;
  padding: 18px 19px 16px;
  border: 1px solid var(--line);
  background: var(--white);
  transition: transform 0.3s var(--ease), border-color 0.25s ease, box-shadow 0.3s ease;
}

.oss-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 18px 40px rgba(11, 14, 21, 0.08);
}

.oss-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 22px;
}

.oss-card__cat {
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.07em;
}

.oss-card__stars {
  flex: none;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.oss-card__repo {
  margin-bottom: 7px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.01em;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.oss-card h3 {
  color: var(--ink);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.oss-card p {
  flex: 1;
  margin-top: 7px;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.72;
}

.oss-card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px 7px;
  margin-top: 16px;
  padding-top: 11px;
  border-top: 1px solid var(--line);
}

.oss-card__license {
  padding: 3px 5px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 6.8px;
  letter-spacing: 0.01em;
}

.oss-card__lang {
  margin-left: auto;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 6.8px;
  letter-spacing: 0.01em;
}

.oss-card__level {
  padding-left: 7px;
  border-left: 1px solid var(--line);
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 6.8px;
  letter-spacing: 0.02em;
}

.oss-card.is-hidden,
.oss-card.is-archived {
  display: none;
}


@media (max-width: 1100px) {
  .oss-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 700px) {
  .oss-grid {
    grid-template-columns: 1fr;
  }

  .oss-card {
    min-height: 0;
  }

  .oss-card__head {
    margin-bottom: 16px;
  }
}


.oss-load-more {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

.oss-load-more[hidden] {
  display: none;
}


@media (max-width: 1100px) {
  .resource-toolbar[data-oss-filters] {
    flex-direction: column;
    align-items: stretch;
  }

  .resource-toolbar[data-oss-filters] .search-field {
    width: 100%;
  }
}

/* Contact / enterprise WeChat card */

.contact-wechat-wrap {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.wechat-card {
  width: min(100%, 410px);
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: var(--paper);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.24);
}

.wechat-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 2px 2px 12px;
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.04em;
}

.wechat-card__head span:last-child {
  color: var(--muted-2);
}

.wechat-card__image {
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}

.wechat-card__image img {
  display: block;
  width: 100%;
  height: auto;
}

.wechat-card__body {
  padding: 16px 2px 0;
}

.wechat-card__body h3 {
  color: var(--ink);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.wechat-card__body p {
  margin-top: 7px;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.7;
}

.wechat-card__foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px;
  margin-top: 14px;
  padding-top: 11px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 7.5px;
}

.wechat-card__foot a {
  color: var(--orange-deep);
}

@media (max-width: 640px) {
  .wechat-card {
    width: 100%;
  }
}

/* National base section */

.base-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  margin-top: clamp(28px, 4vw, 48px);
}

.base-copy .display {
  font-size: clamp(36px, 4.3vw, 58px);
  line-height: 1.12;
}

.base-copy .display em {
  color: var(--orange-deep);
}

.base-copy > p {
  max-width: 520px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.base-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 24px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.base-stats div {
  padding: 15px 12px 14px 0;
  border-right: 1px solid var(--line);
}

.base-stats div + div {
  padding-left: 14px;
}

.base-stats div:last-child {
  border-right: 0;
}

.base-stats strong {
  display: block;
  font-size: clamp(25px, 2.4vw, 34px);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1;
}

.base-stats strong em {
  color: var(--orange-deep);
  font-style: normal;
  font-size: 0.55em;
  margin-left: 1px;
}

.base-stats span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 7px;
  letter-spacing: 0.03em;
}

.base-source {
  margin-top: 12px !important;
  font-size: 9px !important;
  color: var(--muted) !important;
}

.base-source a {
  color: var(--orange-deep);
  border-bottom: 1px solid rgba(185, 55, 4, 0.3);
}

.base-source span {
  margin: 0 4px;
}

.base-visual {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink);
}

.base-visual img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.03);
}

.base-visual figcaption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  color: rgba(255, 255, 255, 0.68);
  font-family: var(--font-mono);
  font-size: 7px;
  letter-spacing: 0.04em;
}

@media (max-width: 900px) {
  .base-grid {
    grid-template-columns: 1fr;
  }
}

/* Collaboration directions */

.collab-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 30px;
}

.collab-card {
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  background: var(--white);
  min-height: 170px;
}

.collab-card span {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--orange-deep);
  letter-spacing: 0.08em;
}

.collab-card h3 {
  margin-top: 22px;
  font-size: 22px;
  letter-spacing: -0.035em;
}

.collab-card p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

.collab-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.collab-foot p {
  color: var(--muted);
  font-size: 11px;
}

@media (max-width: 900px) {
  .collab-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .collab-grid {
    grid-template-columns: 1fr;
  }

  .collab-foot {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* --------------------------------------------------------------------------
   About hero — building image with gradient / blur
   -------------------------------------------------------------------------- */

.page-hero--about {
  min-height: clamp(620px, 67vh, 730px);
}

.about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.35) 18%, #000 48%, #000 100%);
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.35) 18%, #000 48%, #000 100%);
}

.about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% 52%;
  filter: blur(2.4px) saturate(0.8) contrast(0.95) brightness(0.82);
  transform: scale(1.04);
}

.about-hero__shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(11, 14, 21, 0.98) 0%, rgba(11, 14, 21, 0.94) 26%, rgba(11, 14, 21, 0.68) 52%, rgba(11, 14, 21, 0.32) 78%, rgba(11, 14, 21, 0.44) 100%),
    linear-gradient(180deg, rgba(11, 14, 21, 0.55) 0%, rgba(11, 14, 21, 0.05) 36%, rgba(11, 14, 21, 0.82) 100%);
}

.page-hero--about .page-hero__grid {
  z-index: 1;
  opacity: 0.65;
}

.page-hero--about .page-hero__glow {
  display: none;
}

.page-hero--about .page-hero__grid-inner {
  display: block;
  max-width: 960px;
}

.page-hero--about .page-hero__title {
  max-width: 880px;
}

.page-hero--about .page-hero__lead {
  max-width: 600px;
}

@media (max-width: 960px) {
  .page-hero--about {
    min-height: 600px;
  }

  .about-hero__media img {
    object-position: 60% 52%;
    filter: blur(2.8px) saturate(0.8) contrast(0.95) brightness(0.8);
  }

  .about-hero__shade {
    background:
      linear-gradient(90deg, rgba(11, 14, 21, 0.98) 0%, rgba(11, 14, 21, 0.92) 42%, rgba(11, 14, 21, 0.55) 78%, rgba(11, 14, 21, 0.48) 100%),
      linear-gradient(180deg, rgba(11, 14, 21, 0.64) 0%, rgba(11, 14, 21, 0.16) 36%, rgba(11, 14, 21, 0.88) 100%);
  }

  .page-hero--about .page-hero__grid-inner {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .page-hero--about {
    min-height: 540px;
    padding-top: calc(var(--header-h) + 64px);
  }

  .about-hero__media {
    -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.45) 0%, #000 38%, #000 100%);
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.45) 0%, #000 38%, #000 100%);
  }

  .about-hero__media img {
    object-position: 60% 50%;
    filter: blur(3px) saturate(0.78) contrast(0.94) brightness(0.74);
  }

  .about-hero__shade {
    background:
      linear-gradient(180deg, rgba(11, 14, 21, 0.74) 0%, rgba(11, 14, 21, 0.55) 30%, rgba(11, 14, 21, 0.88) 74%, rgba(11, 14, 21, 0.97) 100%),
      linear-gradient(90deg, rgba(11, 14, 21, 0.35), rgba(11, 14, 21, 0.08));
  }
}