/* 地学大数据创新中心 — visual polish */

:root {
  --ink: #142028;
  --ink-soft: #3c5160;
  --accent: #0d6e6c;
  --accent-hover: #0a5553;
  --accent-soft: rgba(13, 110, 108, 0.1);
  --ochre: #a68456;
  --ochre-soft: rgba(166, 132, 86, 0.16);
  --bg: #f3efe6;
  --bg-wash: #f8f5ef;
  --bg-elevated: #fffcf8;
  --line: #e3d9cc;
  --line-soft: rgba(20, 32, 40, 0.08);
  --viz-dark: #0c161c;
  --viz-mid: #163038;
  --muted: #6d7c86;
  --max: 1180px;
  --nav-h: 76px;
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-ui: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-soft: 0 16px 40px rgba(20, 32, 40, 0.07);
  --shadow-card: 0 22px 50px rgba(20, 32, 40, 0.12);
  --radius: 16px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  scrollbar-color: #c8b79a transparent;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 70% 42% at 100% -8%, rgba(13, 110, 108, 0.1), transparent 55%),
    radial-gradient(ellipse 48% 36% at -8% 16%, rgba(166, 132, 86, 0.12), transparent 50%),
    linear-gradient(180deg, var(--bg-wash) 0%, var(--bg) 38%, #efeae1 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: rgba(12, 111, 110, 0.22);
  color: var(--ink);
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--accent-hover);
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.28;
  margin: 0 0 0.55em;
  color: var(--ink);
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 1em;
  color: var(--ink-soft);
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
  color: var(--ink-soft);
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.8rem;
  left: 50%;
  z-index: 1000;
  padding: 0.6rem 1rem;
  color: #fff;
  background: var(--accent);
  border-radius: 3px;
  transform: translate(-50%, -160%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
  color: #fff;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(248, 245, 239, 0.72);
  backdrop-filter: blur(18px) saturate(1.3);
  border-bottom: 1px solid transparent;
  transition: border-color 0.35s, background 0.35s, box-shadow 0.35s;
}

.site-header.is-scrolled {
  border-bottom-color: transparent;
  background: rgba(255, 252, 248, 0.9);
  box-shadow: 0 10px 30px rgba(20, 32, 40, 0.06);
}

.site-header.is-scrolled::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(166, 132, 86, 0.75), rgba(13, 110, 108, 0.55), transparent);
}

.site-header .header-inner {
  width: min(100% - 2rem, 1360px);
}

.header-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--ink);
  min-width: 0;
}

.brand:hover {
  color: var(--ink);
}

.brand-logos {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.brand-logos img {
  display: block;
  height: 50px;
  width: auto;
}

.brand-logos img:first-child {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 14px rgba(20, 48, 110, 0.16);
}

.brand-mark {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background:
    linear-gradient(145deg, #1aa39a 0%, #0d6e6c 46%, #14343a 100%);
  position: relative;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.16),
    0 8px 18px rgba(13, 110, 108, 0.28);
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      -18deg,
      transparent 0 5px,
      rgba(255, 255, 255, 0.05) 5px 6px
    );
  border-radius: inherit;
  opacity: 0.7;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1.5px solid rgba(255, 255, 255, 0.62);
  border-radius: 1px;
  clip-path: polygon(0 38%, 100% 0, 100% 62%, 0 100%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  min-width: 0;
}

.brand-text strong {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text span {
  font-family: var(--font-ui);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text-full strong {
  font-size: 0.92rem;
  letter-spacing: 0;
  overflow: visible;
  text-overflow: unset;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  border-radius: 5px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.1rem;
}

.site-nav a {
  font-family: var(--font-ui);
  font-size: 0.84rem;
  color: var(--ink-soft);
  padding: 0.42rem 0.55rem;
  border-radius: 8px;
  white-space: nowrap;
  position: relative;
}

.site-nav a:not(.nav-login)::after {
  content: "";
  position: absolute;
  left: 0.58rem;
  right: 0.58rem;
  bottom: 0.28rem;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease);
}

.site-nav a:not(.nav-login):hover::after,
.site-nav a[aria-current="page"]:not(.nav-login)::after {
  transform: scaleX(1);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--accent);
}

.site-nav .nav-login {
  margin-left: 0.55rem;
  padding: 0.42rem 1.05rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(180deg, #14918c, #0c6a68);
  box-shadow: 0 8px 18px rgba(13, 110, 108, 0.24);
}

.site-nav .nav-login:hover {
  background: var(--accent-hover);
  color: #fff;
}

/* 在线服务暂不展示 */
a[href="services/index.html"],
a[href="../services/index.html"],
li:has(> a[href="services/index.html"]),
li:has(> a[href="../services/index.html"]),
.hidden-feature {
  display: none !important;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  padding: 0.84rem 1.45rem;
  border-radius: 10px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.btn-primary {
  background: linear-gradient(180deg, #15918c 0%, #0c6a68 100%);
  color: #fff;
  box-shadow: 0 12px 26px rgba(13, 110, 108, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #117e79 0%, #094f4d 100%);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(13, 110, 108, 0.32);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.38);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  min-height: calc(100dvh - var(--nav-h));
  display: flex;
  align-items: flex-end;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  transform: scale(1.06);
  animation: hero-drift 32s var(--ease) infinite alternate;
  will-change: transform;
}

@keyframes hero-drift {
  from {
    transform: scale(1.06) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.12) translate3d(-1.8%, -1.2%, 0);
  }
}

.hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse 55% 45% at 72% 48%, rgba(12, 111, 110, 0.08), transparent 62%),
    linear-gradient(180deg, rgba(8, 16, 20, 0.18) 0%, rgba(8, 18, 22, 0.12) 42%, rgba(8, 16, 20, 0.72) 100%),
    linear-gradient(100deg, rgba(6, 16, 20, 0.78) 0%, rgba(8, 24, 28, 0.28) 42%, transparent 68%);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image: url("../assets/topo.svg");
  background-size: 280px 186px;
  opacity: 0.08;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(100% - 2.5rem, var(--max));
  max-width: 760px;
  margin: 0 auto 10.6rem;
  margin-left: max(1.25rem, calc((100% - var(--max)) / 2));
  animation: rise-in 1s var(--ease) both;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-kicker {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(232, 238, 237, 0.72);
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.hero-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--ochre);
}

.hero h1 {
  font-size: clamp(2rem, 4.4vw, 3.15rem);
  color: #fff;
  margin-bottom: 0.9rem;
  text-wrap: balance;
  letter-spacing: 0.02em;
  text-shadow: 0 16px 40px rgba(0, 0, 0, 0.32);
}

.hero-lead {
  font-size: 1.08rem;
  color: rgba(232, 238, 237, 0.84);
  margin-bottom: 1.9rem;
  max-width: 34em;
  letter-spacing: 0.04em;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: -0.55rem 0 1.7rem;
}

.hero-meta span {
  padding: 0.32rem 0.78rem;
  color: rgba(255, 248, 238, 0.86);
  font-family: var(--font-ui);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.hero-scroll {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 1.4rem;
  transform: translateX(-50%);
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  animation: rise-in 1.2s 0.35s var(--ease) both;
}

.hero-scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), transparent);
  animation: scroll-pulse 2.2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%,
  100% {
    transform: scaleY(0.7);
    opacity: 0.45;
  }
  50% {
    transform: scaleY(1);
    opacity: 1;
  }
}

/* —— Trust strip (overlaps hero) —— */
.trust-strip {
  position: relative;
  z-index: 4;
  margin-top: -7rem;
  background: transparent;
  color: var(--ink-soft);
}

.trust-strip-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 0.35rem 0.2rem;
  background: rgba(255, 252, 248, 0.92);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: 18px;
  box-shadow: var(--shadow-card);
}

.trust-item {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  padding: 1rem 1.6rem;
  border-right: 1px solid var(--line);
}

.trust-item:last-child {
  border-right: none;
}

.trust-item span {
  font-family: var(--font-ui);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--ochre);
}

.trust-item strong {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
}

/* —— Research framework —— */
.section-intelligence {
  padding: 5.6rem 0 5.3rem;
  overflow: hidden;
}

.intelligence-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2.5rem, 7vw, 7rem);
  align-items: center;
}

.intelligence-intro .section-index {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ochre);
}

.intelligence-intro h2 {
  margin-top: 0.7rem;
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  line-height: 1.42;
}

.intelligence-intro h2::after {
  content: "";
  display: block;
  width: 2.8rem;
  height: 2px;
  margin-top: 1rem;
  background: linear-gradient(90deg, var(--ochre), var(--accent));
}

.intelligence-intro p {
  max-width: 31rem;
  margin: 1.1rem 0 1.25rem;
}

.intelligence-path {
  position: relative;
  display: grid;
  gap: 0;
  padding: 0.25rem 0;
}

.intelligence-path::before {
  content: "";
  position: absolute;
  top: 1.7rem;
  bottom: 1.7rem;
  left: 2.25rem;
  width: 1px;
  background: linear-gradient(var(--accent), rgba(13, 110, 108, 0.08));
}

.path-item {
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 0.85rem;
  align-items: start;
  margin: 0 0 0.8rem;
  padding: 1.15rem 1.2rem;
  background: rgba(255, 252, 248, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(20, 32, 40, 0.05);
  transition: transform 0.25s var(--ease), background 0.25s, box-shadow 0.25s;
}

.path-item:last-child {
  margin-bottom: 0;
}

.path-item:hover {
  background: #fff;
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(20, 32, 40, 0.09);
}

.path-number {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  color: var(--accent);
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  background: #fff;
  border: 1px solid rgba(166, 132, 86, 0.5);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(166, 132, 86, 0.12);
}

.path-item h3 {
  margin: 0 0 0.22rem;
  font-size: 1.08rem;
}

.path-item p {
  margin: 0;
  font-size: 0.92rem;
}

/* —— Sections —— */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-head {
  margin-bottom: 2.6rem;
  max-width: 42rem;
}

.section-head .section-index {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ochre);
  margin-bottom: 0.7rem;
  display: block;
}

.section-head h2 {
  font-size: clamp(1.55rem, 2.6vw, 2rem);
  margin-bottom: 0.55rem;
  position: relative;
  display: inline-block;
}

.section-head h2::after {
  content: "";
  display: block;
  width: 2.6rem;
  height: 2px;
  margin-top: 0.75rem;
  background: linear-gradient(90deg, var(--ochre), var(--accent));
}

.section-head p {
  margin: 0.85rem 0 0;
  font-size: 1.02rem;
}

.section-head-row {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  flex-wrap: wrap;
  max-width: none;
}

.section-dark {
  background: var(--viz-dark);
  color: #e8eeed;
}

.section-dark h2,
.section-dark h3 {
  color: #fff;
}

.section-dark p,
.section-dark li {
  color: rgba(232, 238, 237, 0.78);
}

.section-light {
  background: linear-gradient(180deg, rgba(255, 252, 248, 0.55), rgba(255, 252, 248, 0.92));
  border-block: 1px solid rgba(166, 132, 86, 0.16);
}

.section-tight-top {
  padding-top: 0;
}

/* Capability list */
.capability-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.capability-item {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 2.4rem;
  align-items: center;
  padding: 2.4rem 0;
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.capability-item.is-visible {
  opacity: 1;
  transform: none;
}

.capability-item:nth-child(even) {
  direction: rtl;
}

.capability-item:nth-child(even) > * {
  direction: ltr;
}

.capability-copy {
  position: relative;
  padding-left: 3.2rem;
}

.capability-num {
  position: absolute;
  left: 0;
  top: 0.15rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.capability-copy h3 {
  font-size: 1.42rem;
  margin-bottom: 0.45rem;
}

.capability-copy p {
  margin-bottom: 1rem;
  max-width: 34em;
}

.capability-media {
  overflow: hidden;
  border-radius: 18px;
  aspect-ratio: 16 / 10;
  background: var(--viz-dark);
  position: relative;
  box-shadow: var(--shadow-card);
}

.capability-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.capability-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--ease), filter 0.9s var(--ease);
  filter: saturate(1.05) contrast(1.02);
}

.capability-item:hover .capability-media img {
  transform: scale(1.05);
  filter: saturate(1.1) contrast(1.04);
}

.text-link {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.text-link::after {
  content: "→";
  transition: transform 0.25s var(--ease);
}

.text-link:hover::after {
  transform: translateX(4px);
}

/* Featured case strip */
.case-strip {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 0;
  min-height: 460px;
  background: linear-gradient(145deg, #101c22 0%, #16383a 100%);
  overflow: hidden;
  position: relative;
  border-radius: 20px;
  box-shadow: var(--shadow-card);
}

.case-strip::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.06);
  pointer-events: none;
  z-index: 2;
}

.case-strip-media {
  position: relative;
  min-height: 300px;
}

.case-strip-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transition: transform 1.1s var(--ease);
}

.case-strip:hover .case-strip-media img {
  transform: scale(1.04);
}

.case-strip-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 55%, rgba(12, 20, 24, 0.55));
  z-index: 1;
}

.case-strip-body {
  padding: 3.2rem 2.6rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.case-strip-body .eyebrow {
  font-family: var(--font-ui);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ochre);
  margin-bottom: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.case-strip-body .eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
}

.case-strip-body .btn {
  align-self: flex-start;
}

.case-strip-body h3 {
  font-size: 1.75rem;
  color: #fff;
  margin-bottom: 0.85rem;
}

.case-strip-body p {
  color: rgba(232, 238, 237, 0.76);
  margin-bottom: 1.7rem;
}

/* News list */
.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.news-list li {
  border-bottom: 1px solid var(--line);
}

.news-list a {
  display: grid;
  grid-template-columns: 7rem 1fr auto;
  gap: 1.25rem;
  align-items: baseline;
  padding: 1.25rem 0.85rem 1.25rem 0.9rem;
  color: var(--ink);
  position: relative;
  border-radius: 12px;
  transition: background 0.25s, padding-left 0.25s, color 0.25s;
}

.news-list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.9rem;
  bottom: 0.9rem;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transition: transform 0.28s var(--ease);
}

.news-list a:hover {
  color: var(--accent);
  background: rgba(12, 111, 110, 0.04);
  padding-left: 1rem;
}

.news-list a:hover::before {
  transform: scaleY(1);
}

.news-list time {
  font-family: var(--font-ui);
  font-size: 0.84rem;
  color: var(--ochre);
  letter-spacing: 0.03em;
}

.news-list span.tag {
  font-family: var(--font-ui);
  font-size: 0.74rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* Reveal utility */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* —— Page chrome —— */
.page-hero {
  padding: 4.5rem 0 3.5rem;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(105deg, rgba(8, 18, 22, 0.92) 0%, rgba(12, 52, 50, 0.78) 46%, rgba(16, 28, 34, 0.88) 100%),
    url("../assets/texture-rock.png") center / cover;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/topo.svg");
  background-size: 260px 173px;
  opacity: 0.12;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-size: clamp(1.85rem, 3.4vw, 2.45rem);
  margin-bottom: 0.45rem;
  color: #fff;
}

.page-hero h1::after {
  content: "";
  display: block;
  width: 3rem;
  height: 2px;
  margin-top: 0.85rem;
  background: linear-gradient(90deg, #c6a36a, transparent);
}

.page-hero p {
  margin: 0;
  max-width: 40rem;
  color: rgba(232, 238, 237, 0.78);
}

.breadcrumb {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: rgba(232, 238, 237, 0.55);
  margin-bottom: 0.95rem;
  letter-spacing: 0.04em;
}

.breadcrumb a {
  color: rgba(232, 238, 237, 0.65);
}

.breadcrumb a:hover {
  color: #fff;
}

/* About layout */
.about-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.75rem;
  padding: 2.9rem 0 4.5rem;
  align-items: start;
}

.side-nav {
  position: sticky;
  top: calc(var(--nav-h) + 1rem);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.7rem 0.35rem;
  border-left: 2px solid rgba(166, 132, 86, 0.45);
  border-radius: 0 14px 14px 0;
  background: rgba(255, 252, 248, 0.78);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(8px);
}

.side-nav a {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding: 0.48rem 0.9rem;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.side-nav a:hover,
.side-nav a[aria-current="page"],
.side-nav a.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-soft);
}

.content-block + .content-block {
  margin-top: 2.75rem;
  padding-top: 2.75rem;
  border-top: 1px solid var(--line);
}

.content-block h2 {
  font-size: 1.4rem;
}

.content-block figure,
.section figure {
  margin: 1.5rem 0 0;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.content-block figure img {
  width: 100%;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.5rem;
  margin: 1.25rem 0 1.4rem;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.meta-row span {
  padding: 0.42rem 0.85rem;
  background: rgba(255, 252, 248, 0.9);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.meta-row strong {
  color: var(--ink);
  font-weight: 600;
  margin-right: 0.35rem;
}

.research-grid {
  display: grid;
  gap: 1.35rem;
}

.research-block {
  padding: 1.3rem 1.4rem;
  background: rgba(255, 252, 248, 0.86);
  border-left: 3px solid var(--accent);
  border-radius: 0 14px 14px 0;
  box-shadow: var(--shadow-soft);
}

.research-block h3 {
  font-size: 1.08rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.org-tree {
  font-family: var(--font-ui);
  font-size: 0.92rem;
  padding: 1.35rem 1.5rem;
  background: rgba(255, 252, 248, 0.86);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.org-tree ul {
  list-style: none;
  padding-left: 1.1rem;
  border-left: 1px solid var(--line);
  margin: 0.4rem 0;
}

.org-tree > ul {
  padding-left: 0;
  border-left: none;
}

.org-tree li {
  margin: 0.35rem 0;
  color: var(--ink-soft);
}

.org-tree .node {
  color: var(--ink);
  font-weight: 600;
}

.partner-list {
  display: grid;
  gap: 1.15rem;
}

.partner-item {
  padding: 1.3rem 1.4rem;
  background: rgba(255, 252, 248, 0.86);
  border-top: 2px solid var(--ochre);
  border-radius: 0 0 14px 14px;
  box-shadow: var(--shadow-soft);
}

.partner-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.faculty-names {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.6rem;
  margin: 0.35rem 0 1rem;
}

.faculty-hint {
  margin: 0 0 0.4rem;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--muted, #6b7280);
}

.faculty-name {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-ui);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent);
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  padding: 0;
  cursor: pointer;
  text-decoration: underline dashed;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

.faculty-name::before {
  content: "▸";
  font-size: 0.85em;
  transition: transform 0.2s ease;
}

.faculty-name:hover,
.faculty-name:focus,
.faculty-name:focus-visible,
.faculty-name[aria-expanded="true"] {
  background: none;
  color: var(--accent-hover);
  border: 0;
  box-shadow: none;
  outline: none;
  text-decoration: underline solid;
  text-decoration-thickness: 2px;
}

.faculty-name[aria-expanded="true"]::before {
  transform: rotate(90deg);
}

.faculty-bio[hidden] {
  display: none;
}

/* Products / services */
.split-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.2rem;
  margin-bottom: 3rem;
  align-items: center;
}

.split-intro img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: var(--shadow-card);
}

.feature-rows {
  display: grid;
  gap: 0;
}

.feature-row {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 1.5rem;
  padding: 1.4rem 0;
  border-top: 1px solid var(--line);
  transition: background 0.25s, padding-left 0.25s;
}

.feature-row:last-child {
  border-bottom: 1px solid var(--line);
}

.feature-row:hover {
  background: rgba(13, 110, 108, 0.05);
  padding-left: 0.7rem;
  border-radius: 10px;
}

.feature-row h3 {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0;
  color: var(--accent);
}

.feature-row p {
  margin: 0;
}

.service-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.service-group {
  background: var(--bg-elevated);
  padding: 1.6rem 1.35rem 1.45rem;
  transition: background 0.25s, transform 0.25s;
}

.service-group:hover {
  background: #fafcfb;
  transform: translateY(-2px);
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-soft);
}

.service-group h3 {
  font-size: 1.05rem;
  margin-bottom: 0.8rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}

.service-group h3::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 0.55rem;
  background: var(--ochre);
  transform: rotate(45deg);
  vertical-align: 1px;
}

.service-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.service-group li {
  font-size: 0.92rem;
  padding: 0.38rem 0;
  color: var(--ink-soft);
}

.service-group li.soon {
  color: var(--muted);
}

.service-group li.soon::after {
  content: " · 即将开放";
  font-size: 0.74rem;
  color: var(--ochre);
}

/* Cases */
.case-index {
  display: grid;
  gap: 0;
}

.case-index a {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 1.6rem;
  align-items: center;
  padding: 1.55rem 0.4rem;
  border-bottom: 1px solid var(--line);
  color: inherit;
  transition: background 0.25s, padding-left 0.25s;
}

.case-index a:first-child {
  border-top: 1px solid var(--line);
}

.case-index a:hover {
  background: rgba(13, 110, 108, 0.05);
  padding-left: 0.75rem;
  border-radius: 12px;
}

.case-index a:hover h3 {
  color: var(--accent);
}

.case-index-thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--viz-dark);
  border-radius: 14px;
  box-shadow: var(--shadow-soft);
}

.case-index-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}

.case-index a:hover .case-index-thumb img {
  transform: scale(1.05);
}

.case-index h3 {
  font-size: 1.22rem;
  margin-bottom: 0.35rem;
  transition: color 0.2s;
}

.case-index p {
  margin: 0;
  font-size: 0.95rem;
}

.prose {
  max-width: 42rem;
}

.prose h2 {
  font-size: 1.3rem;
  margin-top: 2.1rem;
}

.prose h3 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
}

.prose figure {
  margin: 1.75rem 0;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.prose figure img {
  width: 100%;
}

.prose figcaption {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.55rem;
}

/* News / contact */
.news-page-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-page-list li {
  padding: 1.45rem 0.35rem;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s, padding-left 0.25s;
}

.news-page-list li:first-child {
  border-top: 1px solid var(--line);
}

.news-page-list li:hover {
  background: rgba(13, 110, 108, 0.05);
  padding-left: 0.75rem;
  border-radius: 12px;
}

.news-page-list .meta {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
  letter-spacing: 0.03em;
}

.news-page-list h2 {
  font-size: 1.18rem;
  margin-bottom: 0.35rem;
}

.news-page-list p {
  margin: 0;
  font-size: 0.95rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  padding: 2.9rem 0 4.5rem;
}

.contact-info {
  padding: 1.7rem 1.7rem;
  background: rgba(255, 252, 248, 0.88);
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
}

.contact-info dt {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.contact-info dt:first-child {
  margin-top: 0;
}

.contact-info dd {
  margin: 0.25rem 0 0;
  color: var(--ink);
}

.contact-form {
  display: grid;
  gap: 0.95rem;
  padding: 1.7rem 1.7rem;
  background: rgba(255, 252, 248, 0.92);
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  box-shadow: var(--shadow-card);
}

.contact-form label {
  display: grid;
  gap: 0.35rem;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  font: inherit;
  padding: 0.78rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(12, 111, 110, 0.14);
}

.contact-form textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0;
}

/* Footer */
.site-footer {
  position: relative;
  background:
    radial-gradient(ellipse 50% 80% at 0% 100%, rgba(13, 110, 108, 0.35), transparent 60%),
    radial-gradient(ellipse 40% 70% at 100% 0%, rgba(166, 132, 86, 0.18), transparent 55%),
    linear-gradient(180deg, #122028, #0c161c);
  color: rgba(255, 255, 255, 0.72);
  padding: 3.6rem 0 2.1rem;
  margin-top: auto;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #c6a36a, #1aa39a, #c6a36a, transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.45fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.6rem;
}

.site-footer h3 {
  font-family: var(--font-ui);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
  margin-bottom: 0.9rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.78);
}

.site-footer a:hover {
  color: #fff;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.08rem;
  color: #fff;
  margin-bottom: 0.65rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.footer-links a {
  display: inline-flex;
  transition: color 0.2s, transform 0.2s var(--ease);
}

.footer-links a:hover {
  transform: translateX(3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.3rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.45);
}

/* Transfer / research lists */
.outcome-stack {
  counter-reset: outcome;
}

.outcome-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.outcome-list li {
  counter-increment: outcome;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.75rem;
  padding: 1rem 0.25rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  transition: background 0.2s, padding-left 0.2s;
}

.outcome-list li:hover {
  background: rgba(13, 110, 108, 0.05);
  padding-left: 0.55rem;
  border-radius: 10px;
}

.outcome-list li::before {
  content: counter(outcome, decimal-leading-zero);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--ochre);
  padding-top: 0.15rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
}

.pill {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  padding: 0.38rem 0.75rem;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  border-radius: 999px;
  background: rgba(255, 252, 248, 0.85);
}

.product-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
  margin-top: 2.2rem;
}

.product-gallery figure {
  margin: 0;
  background: #fff;
}

.product-gallery img {
  width: 100%;
  height: auto;
}

.product-gallery figcaption {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--muted);
  padding: 0.65rem 0.85rem 0.8rem;
}

/* Responsive */
@media (max-width: 960px) {
  .capability-item,
  .capability-item:nth-child(even),
  .case-strip,
  .about-layout,
  .split-intro,
  .contact-grid,
  .footer-grid,
  .case-index a,
  .feature-row,
  .service-matrix,
  .intelligence-layout,
  .product-gallery {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .section-intelligence {
    padding: 4.4rem 0;
  }

  .capability-copy {
    padding-left: 2.6rem;
  }

  .side-nav {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    border-left: none;
    border-bottom: 1px solid var(--line);
    border-radius: 14px;
    padding: 0.55rem;
    margin-bottom: 0.5rem;
    gap: 0.25rem;
    box-shadow: none;
  }

  .side-nav a {
    border-left: none;
    margin-left: 0;
    border-radius: 8px;
    padding: 0.4rem 0.7rem;
  }

  .side-nav a:hover,
  .side-nav a[aria-current="page"],
  .side-nav a.is-active {
    border-left-color: transparent;
  }

  .case-strip-media::after {
    background: linear-gradient(180deg, transparent 40%, rgba(12, 20, 24, 0.7));
  }

  .case-strip-body {
    padding: 2rem 1.5rem 2.5rem;
  }

  .news-list a {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .hero-content {
    margin-bottom: 3.6rem;
  }

  .trust-strip {
    margin-top: 1.15rem;
  }

  .trust-strip-inner {
    grid-template-columns: 1fr;
    padding: 0.35rem 1.15rem;
  }

  .trust-item,
  .trust-item:last-child {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 0.95rem 0.2rem;
  }

  .trust-item:last-child {
    border-bottom: none;
  }
}

@media (max-width: 1100px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(255, 252, 248, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1.25rem 1rem;
    gap: 0.15rem;
    box-shadow: 0 16px 36px rgba(22, 36, 44, 0.1);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a:not(.nav-login)::after {
    display: none;
  }

  .site-nav .nav-login {
    margin: 0.5rem 0 0;
    text-align: center;
  }

  .brand-text span {
    display: none;
  }

  .hero-meta {
    margin-bottom: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-media img,
  .hero-scroll-line {
    animation: none;
  }

  .capability-item,
  .hero-content,
  .hero-scroll,
  .reveal {
    animation: none;
    opacity: 1;
    transform: none;
    transition: none;
  }
}