/* ==========================================================================
   云图科技 · 官网样式
   无外部字体与框架依赖，适配政企客户常见浏览器环境
   ========================================================================== */

:root {
  --ink: #06131b;
  --ink-2: #0a1d27;
  --ink-3: #0f2a35;
  --paper: #f5f7f4;
  --paper-2: #edf1ec;
  --white: #ffffff;
  --text: #16262e;
  --muted: #5b6d75;
  --muted-2: #7d8d93;
  --line: #dde5e1;
  --line-strong: #cbd7d2;
  --teal: #0c8f7d;
  --teal-deep: #07685b;
  --teal-bright: #3fe0c0;
  --sand: #e9e2d3;
  --amber: #c99a45;

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC",
    "Source Han Sans SC", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "Cascadia Mono", Consolas, "Liberation Mono",
    "Noto Sans Mono CJK SC", monospace;

  --container: 1200px;
  --gutter: 24px;
  --header-h: 76px;
  --radius: 4px;
  --ease: cubic-bezier(0.22, 0.68, 0.2, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

h1,
h2,
h3,
h4,
p,
figure,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--ink);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 5.2vw, 4.5rem);
  line-height: 1.12;
}

h2 {
  font-size: clamp(2rem, 3.6vw, 3.15rem);
  line-height: 1.18;
}

h3 {
  font-size: 1.35rem;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

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

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

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

::selection {
  background: var(--teal-bright);
  color: var(--ink);
}

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--white);
  color: var(--ink);
  font-size: 14px;
  transform: translateY(-160%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(var(--container), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.section {
  position: relative;
  padding: clamp(72px, 8.5vw, 124px) 0;
}

.section--white {
  background: var(--white);
}

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

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

.section--dark {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.68);
}

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

.section--flush-bottom {
  padding-bottom: 0;
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--white);
}

.section--dark .eyebrow {
  color: var(--teal-bright);
}

[data-anchor] {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

/* ---------- 通用文字 ---------- */

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1.4;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 26px;
  height: 1px;
  background: currentColor;
  content: "";
  flex: none;
}

.lead {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.section--dark .lead {
  color: rgba(255, 255, 255, 0.6);
}

.mono {
  font-family: var(--font-mono);
}

/* ---------- 按钮与链接 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  white-space: nowrap;
  min-height: 50px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease),
    color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn svg {
  width: 16px;
  height: 16px;
  flex: none;
  transition: transform 0.25s var(--ease);
}

.btn:hover svg {
  transform: translateX(3px);
}

.btn--primary {
  background: var(--teal);
  color: var(--white);
}

.btn--primary:hover {
  background: var(--teal-deep);
  transform: translateY(-1px);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.26);
  color: var(--white);
}

.btn--ghost:hover {
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.06);
}

.btn--dark {
  background: var(--ink);
  color: var(--white);
}

.btn--dark:hover {
  background: var(--ink-3);
  transform: translateY(-1px);
}

.btn--light {
  background: var(--white);
  color: var(--ink);
}

.btn--light:hover {
  background: var(--sand);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.link-arrow svg {
  width: 15px;
  height: 15px;
  transition: transform 0.25s var(--ease);
}

.link-arrow:hover svg {
  transform: translateX(4px);
}

.section--dark .link-arrow {
  color: var(--teal-bright);
}

/* ---------- 标签 ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--line);
  background: #fafbf9;
  color: #41545d;
  font-size: 12px;
  line-height: 1.6;
  white-space: nowrap;
}

.section--dark .tag {
  border-color: rgba(255, 255, 255, 0.16);
  background: transparent;
  color: rgba(255, 255, 255, 0.66);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 顶部导航 ---------- */

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 80;
  border-bottom: 1px solid transparent;
  color: var(--white);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease),
    backdrop-filter 0.3s var(--ease);
}

.site-header.is-scrolled,
.site-header.is-open {
  border-bottom-color: rgba(255, 255, 255, 0.09);
  background: rgba(6, 19, 27, 0.9);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 34px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-text strong {
  color: var(--white);
  font-size: 17px;
  font-weight: 650;
  letter-spacing: 0.08em;
  line-height: 1.3;
}

.brand-text em {
  color: rgba(255, 255, 255, 0.48);
  font-family: var(--font-mono);
  font-size: 8.5px;
  font-style: normal;
  letter-spacing: 0.24em;
  line-height: 1.4;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
}

.primary-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: var(--header-h);
  color: rgba(255, 255, 255, 0.7);
  font-size: 14.5px;
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.primary-nav a::after {
  position: absolute;
  right: 0;
  bottom: 20px;
  left: 0;
  height: 1px;
  background: var(--teal-bright);
  content: "";
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s var(--ease);
}

.primary-nav a:hover {
  color: var(--white);
}

.primary-nav a:hover::after,
.primary-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.primary-nav a[aria-current="page"] {
  color: var(--white);
}

.header-cta {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  height: 38px;
  padding: 0 17px;
  border: 1px solid rgba(63, 224, 192, 0.45);
  border-radius: 2px;
  color: var(--teal-bright);
  font-size: 13.5px;
  font-weight: 600;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.header-cta:hover {
  border-color: var(--teal-bright);
  background: rgba(63, 224, 192, 0.09);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-left: auto;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
}

.nav-toggle span {
  position: relative;
  display: block;
  width: 18px;
  height: 1px;
  background: currentColor;
  transition: transform 0.25s var(--ease);
}

.nav-toggle span + span {
  margin-top: 6px;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* ---------- 首页首屏 ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding-top: 144px;
  background: var(--ink);
  color: var(--white);
}

.hero::before {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  content: "";
  mask-image: radial-gradient(ellipse 80% 70% at 60% 35%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 60% 35%, #000 20%, transparent 78%);
  pointer-events: none;
}

.hero::after {
  position: absolute;
  top: -240px;
  right: -180px;
  width: 820px;
  height: 820px;
  background: radial-gradient(circle, rgba(63, 224, 192, 0.13), transparent 62%);
  content: "";
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  align-items: center;
  min-height: 574px;
  padding-bottom: 56px;
}

.hero-copy {
  padding: 30px 0 16px;
}

.hero .eyebrow {
  color: rgba(63, 224, 192, 0.9);
}

.hero h1 {
  max-width: 720px;
  margin-top: 26px;
  color: var(--white);
  font-size: clamp(2.85rem, 5.1vw, 4.35rem);
  font-weight: 650;
  letter-spacing: -0.032em;
  line-height: 1.13;
}

.hero h1 .accent {
  position: relative;
  color: var(--teal-bright);
  white-space: nowrap;
}

.hero h1 .accent::after {
  position: absolute;
  right: 0;
  bottom: 0.02em;
  left: 0;
  height: 0.08em;
  background: rgba(63, 224, 192, 0.32);
  content: "";
}

.hero-lead {
  max-width: 560px;
  margin-top: 26px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 17px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 38px;
  color: rgba(255, 255, 255, 0.38);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.hero-note span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-note span::before {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--teal-bright);
  content: "";
  opacity: 0.7;
}

/* 首屏右侧地形图 */

.hero-visual {
  position: relative;
  justify-self: end;
  width: 100%;
  max-width: 548px;
  aspect-ratio: 1;
}

.map-art {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.map-art .map-grid line {
  stroke: rgba(255, 255, 255, 0.06);
  stroke-width: 1;
}

.map-art .contour {
  fill: none;
  stroke: rgba(130, 220, 202, 0.19);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.map-art .contour--bold {
  stroke: rgba(63, 224, 192, 0.62);
  stroke-width: 1.4;
}

.map-art .axis {
  stroke: rgba(255, 255, 255, 0.16);
  stroke-dasharray: 1 9;
  stroke-width: 1;
}

.map-art .orbit {
  fill: none;
  stroke: rgba(255, 255, 255, 0.16);
  stroke-dasharray: 1 15;
  stroke-width: 1;
  animation: dash 42s linear infinite;
}

.map-art .node {
  fill: var(--teal-bright);
}

.map-art .node-halo {
  fill: none;
  stroke: rgba(63, 224, 192, 0.45);
  stroke-width: 1;
  transform-box: fill-box;
  transform-origin: center;
  animation: halo 3.6s var(--ease) infinite;
}

.map-art .map-label {
  fill: rgba(255, 255, 255, 0.36);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.14em;
}

@keyframes dash {
  to {
    stroke-dashoffset: -560;
  }
}

@keyframes halo {
  0% {
    opacity: 0.8;
    transform: scale(0.55);
  }
  70%,
  100% {
    opacity: 0;
    transform: scale(1.5);
  }
}

.hero-chip {
  position: absolute;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  background: rgba(8, 26, 35, 0.78);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: rgba(255, 255, 255, 0.52);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.hero-chip b {
  color: var(--teal-bright);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0;
}

.hero-chip i {
  color: rgba(255, 255, 255, 0.34);
  font-style: normal;
  font-size: 10px;
}

.hero-chip--a {
  top: 13%;
  right: -2%;
}

.hero-chip--b {
  top: 52%;
  left: -3%;
}

.hero-chip--c {
  right: 4%;
  bottom: 12%;
}

/* 首屏数据条 */

.hero-stats {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stats dl {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.hero-stats dl > div {
  padding: 28px 0 30px 26px;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-stats dl > div:first-child {
  padding-left: 0;
  border-left: 0;
}

.hero-stats dt {
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.hero-stats dd {
  margin-top: 6px;
  color: var(--white);
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 400;
  line-height: 1.1;
}

.hero-stats dd small {
  margin-left: 4px;
  color: var(--teal-bright);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.hero-domains {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 26px;
  padding: 18px 0 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.36);
  font-size: 12px;
}

.hero-domains span {
  color: rgba(255, 255, 255, 0.56);
}

.hero-domains em {
  color: rgba(63, 224, 192, 0.7);
  font-family: var(--font-mono);
  font-size: 10px;
  font-style: normal;
  letter-spacing: 0.14em;
}

/* ---------- 区块标题 ---------- */

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 48px;
  align-items: end;
  margin-bottom: clamp(40px, 5vw, 60px);
}

.section-head h2 {
  margin-top: 18px;
}

.section-head__aside {
  justify-self: end;
  max-width: 440px;
  padding-bottom: 6px;
}

.section-head__aside p {
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.9;
}

.section--dark .section-head__aside p {
  color: rgba(255, 255, 255, 0.58);
}

.section-foot {
  display: flex;
  justify-content: flex-start;
  margin-top: 36px;
}

/* ---------- 能力卡片 ---------- */

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.cap-card {
  position: relative;
  overflow: hidden;
  padding: 34px 36px 32px;
  border: 1px solid var(--line);
  background: var(--white);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease),
    transform 0.3s var(--ease);
}

.cap-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: var(--teal);
  content: "";
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.35s var(--ease);
}

.cap-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 26px 50px -42px rgba(6, 19, 27, 0.5);
  transform: translateY(-3px);
}

.cap-card:hover::before {
  transform: scaleX(1);
}

.cap-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cap-num {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.cap-icon {
  width: 46px;
  height: 46px;
  color: var(--teal);
}

.cap-card h3 {
  margin-top: 24px;
  font-size: 1.5rem;
}

.cap-card p {
  max-width: 460px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

.cap-card .tag-row {
  margin-top: 24px;
}

/* ---------- 解决方案列表 ---------- */

.sol-list {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.sol-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 0.92fr) minmax(0, 1.08fr) 36px;
  gap: 28px;
  align-items: start;
  padding: 34px 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.sol-row:hover {
  padding-left: 14px;
  background: rgba(255, 255, 255, 0.025);
}

.sol-num {
  padding-top: 5px;
  color: var(--teal-bright);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.sol-row h3 {
  font-size: clamp(1.35rem, 2vw, 1.7rem);
  font-weight: 600;
}

.sol-row__body {
  min-width: 0;
}

.sol-row__body p {
  color: rgba(255, 255, 255, 0.56);
  font-size: 14.5px;
  line-height: 1.85;
}

.sol-row .tag-row {
  margin-top: 16px;
}

.sol-row__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--teal-bright);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.sol-row__arrow svg {
  width: 15px;
  height: 15px;
}

.sol-row:hover .sol-row__arrow {
  border-color: var(--teal-bright);
  background: rgba(63, 224, 192, 0.1);
}

/* ---------- 交付方式 ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(44px, 7vw, 96px);
  align-items: start;
}

.split-sticky {
  position: sticky;
  top: calc(var(--header-h) + 40px);
}

.split-copy h2 {
  margin-top: 18px;
}

.split-copy .lead {
  margin-top: 22px;
}

.split-copy .btn {
  margin-top: 32px;
}

.steps {
  list-style: none;
}

.step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 22px;
  padding: 27px 0;
  border-top: 1px solid var(--line);
}

.step:first-child {
  padding-top: 4px;
  border-top: 0;
}

.step:last-child {
  padding-bottom: 0;
}

.step__num {
  padding-top: 2px;
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.step h3 {
  font-size: 1.25rem;
}

.step p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

/* ---------- 案例 ---------- */

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.case-card {
  display: flex;
  flex-direction: column;
  min-height: 350px;
  padding: 30px 30px 28px;
  border: 1px solid var(--line);
  background: var(--white);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.case-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.case-card__tag {
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.case-card h3 {
  margin-top: 17px;
  font-size: 1.25rem;
  line-height: 1.45;
}

.case-card__desc {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.case-card__metric {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: auto;
  padding-top: 24px;
}

.case-card__metric strong {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 400;
  line-height: 1;
}

.case-card__metric span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

/* ---------- 为什么 ---------- */

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.why-item {
  padding: 28px 26px 6px 0;
  border-right: 1px solid var(--line);
}

.why-item:last-child {
  border-right: 0;
}

.why-item strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 400;
  line-height: 1.2;
}

.why-item h3 {
  margin-top: 14px;
  font-size: 1.02rem;
}

.why-item p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.8;
}

/* ---------- CTA ---------- */

.cta {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--white);
}

.cta::before {
  position: absolute;
  top: -320px;
  right: -180px;
  width: 760px;
  height: 760px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(63, 224, 192, 0.14), transparent 62%);
  content: "";
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 40px;
  align-items: center;
  padding: clamp(58px, 7vw, 88px) 0;
}

.cta h2 {
  color: var(--white);
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
}

.cta p {
  max-width: 560px;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 15.5px;
  line-height: 1.85;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

/* ---------- 页脚 ---------- */

.site-footer {
  padding: 68px 0 28px;
  background: #040d12;
  color: rgba(255, 255, 255, 0.55);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.62fr) minmax(0, 0.72fr) minmax(0, 0.86fr);
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.footer-brand p {
  max-width: 300px;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 13.5px;
  line-height: 1.85;
}

.footer-col h4 {
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.footer-col a {
  display: block;
  padding: 4px 0;
  color: rgba(255, 255, 255, 0.48);
  font-size: 13.5px;
  transition: color 0.2s var(--ease);
}

.footer-col a:hover {
  color: var(--teal-bright);
}

.footer-contact h4 {
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.footer-contact p {
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 13.5px;
  line-height: 1.75;
}

.footer-contact strong {
  display: block;
  margin-bottom: 4px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 15px;
  font-weight: 500;
}

.footer-contact a {
  display: inline;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.footer-contact a:hover {
  color: var(--teal-bright);
}

.footer-bottom--bare {
  padding-top: 0;
  border-top: 0;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 26px;
  padding-top: 24px;
  color: rgba(255, 255, 255, 0.36);
  font-size: 12px;
  line-height: 1.8;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 10px;
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.44);
}

.footer-legal a:hover {
  color: var(--teal-bright);
}

.footer-filings {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.footer-filings a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-filings a:hover {
  color: var(--teal-bright);
}

/* ---------- 内页首屏 ---------- */

.page-hero {
  position: relative;
  overflow: hidden;
  padding: 154px 0 70px;
  background: var(--ink);
  color: var(--white);
}

.page-hero::before {
  position: absolute;
  top: -260px;
  right: -140px;
  width: 760px;
  height: 760px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(63, 224, 192, 0.11), transparent 64%);
  content: "";
}

.page-hero::after {
  position: absolute;
  inset: 0;
  background-image: 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: 76px 76px;
  content: "";
  mask-image: linear-gradient(to bottom, #000, transparent 90%);
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 90%);
  pointer-events: none;
}

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

.page-hero__index {
  position: absolute;
  right: max(24px, calc((100vw - var(--container)) / 2));
  bottom: 24px;
  z-index: 0;
  color: rgba(255, 255, 255, 0.035);
  font-family: var(--font-mono);
  font-size: clamp(140px, 19vw, 260px);
  font-weight: 400;
  letter-spacing: -0.08em;
  line-height: 0.72;
  pointer-events: none;
  user-select: none;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.34);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

.breadcrumb span {
  color: rgba(255, 255, 255, 0.2);
}

.page-hero h1 {
  max-width: 900px;
  color: var(--white);
  font-size: clamp(2.35rem, 4.6vw, 3.8rem);
}

.page-hero .lead {
  max-width: 660px;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 16.5px;
}

.page-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.4);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.page-hero__meta b {
  margin-left: 6px;
  color: rgba(255, 255, 255, 0.76);
  font-weight: 500;
}

/* ---------- 服务页 ---------- */

.intro-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 44px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro-strip > div {
  padding: 24px 28px;
  border-left: 1px solid var(--line);
}

.intro-strip > div:first-child {
  padding-left: 0;
  border-left: 0;
}

.intro-strip dt {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
}

.intro-strip dd {
  margin-top: 6px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 500;
}

.service-block {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(40px, 6vw, 80px);
  padding: clamp(48px, 6vw, 72px) 0;
  border-top: 1px solid var(--line);
}

.service-block:first-of-type {
  border-top: 0;
}

.service-aside {
  position: sticky;
  top: calc(var(--header-h) + 40px);
  align-self: start;
}

.service-index {
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.service-aside h2 {
  margin-top: 14px;
  font-size: clamp(1.75rem, 2.6vw, 2.3rem);
}

.service-aside .en {
  display: block;
  margin-top: 10px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.service-aside .link-arrow {
  margin-top: 24px;
}

.service-body > p {
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.95;
}

.service-body > p + p {
  margin-top: 14px;
}

.deliverables {
  margin-top: 32px;
}

.deliverables h3 {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.deliverable-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px 24px;
  list-style: none;
}

.deliverable-list li {
  position: relative;
  padding-left: 16px;
  color: #40535c;
  font-size: 14px;
  line-height: 1.75;
}

.deliverable-list li::before {
  position: absolute;
  top: 0.74em;
  left: 0;
  width: 6px;
  height: 1px;
  background: var(--teal);
  content: "";
}

.scenarios {
  margin-top: 28px;
}

.scenarios h3 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.engagement-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.engagement-card {
  padding: 28px 28px 26px;
  border: 1px solid var(--line);
  background: var(--white);
}

.engagement-card h3 {
  font-size: 1.15rem;
}

.engagement-card p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.engagement-card ul {
  margin-top: 16px;
  list-style: none;
}

.engagement-card li {
  position: relative;
  padding: 4px 0 4px 15px;
  color: #40535c;
  font-size: 13px;
}

.engagement-card li::before {
  position: absolute;
  top: 0.86em;
  left: 0;
  width: 5px;
  height: 1px;
  background: var(--teal);
  content: "";
}

/* ---------- 解决方案页 ---------- */

.solution-detail {
  padding: clamp(50px, 6.5vw, 80px) 0;
  border-top: 1px solid var(--line);
}

.solution-detail:first-of-type {
  border-top: 0;
}

.solution-head {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 26px;
  align-items: baseline;
  margin-bottom: 34px;
}

.solution-head .sol-index {
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.solution-head h2 {
  font-size: clamp(1.8rem, 2.8vw, 2.4rem);
}

.solution-head p {
  max-width: 720px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.9;
}

.solution-body {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(36px, 6vw, 72px);
  align-items: start;
}

.outcomes {
  list-style: none;
}

.outcomes li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: #40535c;
}

.outcomes li:first-child {
  border-top: 0;
}

.outcomes b {
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding-top: 4px;
}

.solution-note {
  margin-top: 24px;
  padding: 16px 18px;
  border-left: 2px solid var(--teal);
  background: var(--paper);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.stack {
  border: 1px solid var(--line);
  background: var(--white);
}

.stack-row {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 17px 20px;
  border-bottom: 1px solid var(--line);
}

.stack-row:last-child {
  border-bottom: 0;
}

.stack-label {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

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

.stack-chip {
  padding: 6px 10px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: #40535c;
  font-size: 12.5px;
  line-height: 1.4;
}

.stack-row--highlight {
  background: #eff8f5;
}

.stack-row--highlight .stack-chip {
  border-color: #cfe8e1;
  background: var(--white);
}

/* ---------- 关于页 ---------- */

.about-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(40px, 7vw, 96px);
  align-items: start;
}

.about-intro h2 {
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
}

.about-copy p {
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.95;
}

.about-copy p + p {
  margin-top: 16px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 56px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.about-stats > div {
  padding: 28px 26px;
  border-left: 1px solid var(--line);
}

.about-stats > div:first-child {
  padding-left: 0;
  border-left: 0;
}

.about-stats dt {
  color: var(--muted-2);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.about-stats dd {
  margin-top: 6px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 2.8vw, 2.25rem);
  line-height: 1.15;
}

.about-stats dd small {
  margin-left: 4px;
  color: var(--teal);
  font-family: var(--font-sans);
  font-size: 12px;
}

.timeline {
  position: relative;
  margin-top: 12px;
}

.timeline::before {
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 76px;
  width: 1px;
  background: var(--line);
  content: "";
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 60px;
  padding: 20px 0;
}

.timeline-item::before {
  position: absolute;
  top: 29px;
  left: 72px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--white);
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 1px var(--teal);
  content: "";
}

.timeline-year {
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.timeline-item h3 {
  font-size: 1.08rem;
}

.timeline-item p {
  margin-top: 5px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.value-card {
  padding: 30px 30px 28px;
  border: 1px solid var(--line);
  background: var(--white);
}

.value-card span {
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.value-card h3 {
  margin-top: 18px;
  font-size: 1.25rem;
}

.value-card p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.team-item {
  padding: 28px 24px 26px 0;
  border-right: 1px solid var(--line);
}

.team-item:last-child {
  border-right: 0;
}

.team-item strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 400;
}

.section--dark .team-item {
  border-right-color: rgba(255, 255, 255, 0.12);
}

.section--dark .team-item strong {
  color: var(--white);
}

.section--dark .team-item p {
  color: rgba(255, 255, 255, 0.5);
}

.team-item h3 {
  margin-top: 10px;
  font-size: 1rem;
}

.team-item p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.qual-block {
  margin-top: 52px;
}

.qual-block h3 {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.quals {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.qual {
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

/* ---------- 联系页 ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(36px, 6vw, 72px);
  align-items: start;
}

.contact-cards {
  display: grid;
  gap: 12px;
}

.contact-card {
  padding: 22px 24px;
  border: 1px solid var(--line);
  background: var(--white);
}

.contact-card__label {
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.contact-card strong {
  display: block;
  margin-top: 8px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.contact-card p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.75;
}

.contact-card a:hover {
  color: var(--teal);
}

.form-card {
  padding: clamp(26px, 3.4vw, 38px);
  border: 1px solid var(--line);
  background: var(--white);
}

.form-card h2 {
  font-size: 1.6rem;
}

.form-card > p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.form {
  margin-top: 26px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  margin-bottom: 7px;
  color: #33464f;
  font-size: 13px;
  font-weight: 600;
}

.field label em {
  color: var(--teal);
  font-style: normal;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 13px;
  border: 1px solid #d3ddd8;
  border-radius: 2px;
  background: #fbfcfa;
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.field textarea {
  min-height: 112px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--teal);
  outline: none;
  box-shadow: 0 0 0 3px rgba(12, 143, 125, 0.1);
}

.field input::placeholder,
.field textarea::placeholder {
  color: #a6b3b6;
}

.form .btn {
  width: 100%;
  margin-top: 4px;
}

.form-note {
  margin-top: 14px;
  color: var(--muted-2);
  font-size: 12px;
  line-height: 1.75;
}

.form-status {
  display: none;
  margin-top: 14px;
  padding: 11px 14px;
  border-left: 2px solid var(--teal);
  background: #eff8f5;
  color: #285c52;
  font-size: 13px;
  line-height: 1.8;
}

.form-status.is-visible {
  display: block;
}

.location {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  border: 1px solid var(--line);
  background: var(--white);
}

.map-figure {
  position: relative;
  min-height: 360px;
  overflow: hidden;
  background: var(--ink);
}

.map-figure svg {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}

.map-figure .map-note {
  position: absolute;
  right: 20px;
  bottom: 18px;
  left: 20px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: rgba(255, 255, 255, 0.38);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
}

.visit-info {
  padding: 32px 34px;
}

.visit-info h2 {
  font-size: 1.45rem;
}

.visit-info h3 {
  margin-top: 24px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.visit-info p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

.biz-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.biz-step {
  padding: 26px 26px 28px;
  border-left: 1px solid var(--line);
}

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

.biz-step span {
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.biz-step h3 {
  margin-top: 12px;
  font-size: 1.05rem;
}

.biz-step p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.8;
}

/* ---------- 法务页 ---------- */

.legal-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}

.legal-nav {
  position: sticky;
  top: calc(var(--header-h) + 40px);
}

.legal-nav h2 {
  margin-bottom: 12px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.legal-nav a {
  display: block;
  padding: 7px 0;
  color: var(--muted);
  font-size: 13.5px;
}

.legal-nav a:hover {
  color: var(--teal);
}

.prose {
  max-width: 800px;
}

.prose h2 {
  margin-top: 44px;
  font-size: 1.45rem;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin-top: 26px;
  font-size: 1.06rem;
}

.prose p,
.prose li {
  margin-top: 12px;
  color: #40535c;
  font-size: 14.5px;
  line-height: 1.95;
}

.prose ul {
  margin-top: 10px;
  padding-left: 20px;
}

.prose li {
  margin-top: 6px;
}

.prose a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose .updated {
  margin-top: 18px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

/* ---------- 404 ---------- */

.error-page {
  display: flex;
  align-items: center;
  min-height: 100vh;
  padding: 120px 0 80px;
  background: var(--ink);
  color: var(--white);
}

body.page-404 {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--ink);
}

body.page-404 main {
  display: flex;
  flex: 1 0 auto;
}

body.page-404 .error-page {
  flex: 1;
  width: 100%;
  min-height: 0;
}

.error-inner {
  max-width: 620px;
}

.error-page .error-code {
  color: var(--teal-bright);
  font-family: var(--font-mono);
  font-size: clamp(4rem, 10vw, 7rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 1;
}

.error-page h1 {
  margin-top: 20px;
  color: var(--white);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
}

.error-page p {
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 15.5px;
  line-height: 1.9;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---------- 滚动出现 ---------- */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.js [data-reveal][data-delay="1"] {
  transition-delay: 0.08s;
}

.js [data-reveal][data-delay="2"] {
  transition-delay: 0.16s;
}

.js [data-reveal][data-delay="3"] {
  transition-delay: 0.24s;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1100px) {
  .hero-inner {
    gap: 36px;
  }

  .hero-chip--a {
    right: 0;
  }

  .hero-chip--b {
    left: 0;
  }

  .footer-top {
    grid-template-columns: 1.2fr 0.6fr 0.7fr 0.8fr;
    gap: 30px;
  }
}

@media (max-width: 960px) {
  :root {
    --header-h: 68px;
  }

  .primary-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 10px 24px 26px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(6, 19, 27, 0.98);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
  }

  .primary-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .primary-nav a {
    height: auto;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    font-size: 16px;
  }

  .primary-nav a::after {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-cta {
    display: none;
  }

  .hero {
    padding-top: 112px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-bottom: 24px;
  }

  .hero-copy {
    padding-top: 18px;
  }

  .hero-visual {
    justify-self: center;
    width: min(440px, 82vw);
    margin: 12px auto 8px;
    opacity: 0.86;
  }

  .hero h1 {
    font-size: clamp(2.55rem, 7.2vw, 3.6rem);
  }

  .hero-lead {
    max-width: 620px;
  }

  .section-head,
  .split,
  .about-intro,
  .contact-grid,
  .solution-body,
  .service-block {
    grid-template-columns: 1fr;
  }

  .section-head {
    gap: 18px;
  }

  .section-head__aside {
    justify-self: start;
    max-width: 620px;
  }

  .split-sticky,
  .service-aside,
  .legal-nav {
    position: static;
  }

  .split-copy .btn {
    margin-top: 26px;
  }

  .sol-row {
    grid-template-columns: 38px minmax(0, 1fr) 32px;
    gap: 18px;
  }

  .sol-row h3 {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
  }

  .sol-row__body {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
    margin-top: -6px;
  }

  .sol-row__arrow {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
  }

  .case-grid,
  .engagement-grid,
  .value-grid {
    grid-template-columns: 1fr 1fr;
  }

  .case-card:last-child,
  .engagement-card:last-child {
    grid-column: span 2;
  }

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

  .why-item:nth-child(2) {
    border-right: 0;
  }

  .why-item:nth-child(1),
  .why-item:nth-child(2) {
    border-bottom: 1px solid var(--line);
  }

  .why-item:nth-child(3) {
    padding-top: 26px;
  }

  .why-item:nth-child(4) {
    padding-top: 26px;
  }

  .cta-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .cta-actions {
    justify-content: flex-start;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px 30px;
  }

  .footer-brand {
    grid-column: span 2;
  }

  .footer-brand p {
    max-width: 440px;
  }

  .footer-contact {
    grid-column: 1 / -1;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  .about-stats > div:nth-child(3) {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .about-stats > div:nth-child(4) {
    border-top: 1px solid var(--line);
  }

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

  .team-item:nth-child(2) {
    border-right: 0;
  }

  .team-item:nth-child(1),
  .team-item:nth-child(2) {
    border-bottom: 1px solid var(--line);
  }

  .team-item:nth-child(3),
  .team-item:nth-child(4) {
    padding-top: 24px;
  }

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

  .map-figure {
    min-height: 300px;
  }

  .biz-steps {
    grid-template-columns: 1fr;
  }

  .biz-step {
    padding: 22px 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .biz-step:first-child {
    border-top: 0;
  }

  .legal-layout {
    grid-template-columns: 1fr;
  }

  .legal-nav {
    display: none;
  }

  .page-hero {
    padding: 126px 0 56px;
  }

  .page-hero__index {
    display: none;
  }

  .intro-strip {
    grid-template-columns: 1fr;
  }

  .intro-strip > div {
    padding: 18px 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .intro-strip > div:first-child {
    border-top: 0;
  }
}

@media (max-width: 680px) {
  :root {
    --gutter: 20px;
  }

  body {
    font-size: 15.5px;
  }

  .hero {
    padding-top: 104px;
  }

  .hero h1 {
    margin-top: 20px;
    font-size: clamp(2.2rem, 10.4vw, 2.9rem);
  }

  .hero-lead {
    margin-top: 20px;
    font-size: 15.5px;
  }

  .hero-actions {
    margin-top: 28px;
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .hero-visual {
    width: min(360px, 92vw);
    margin-top: 20px;
  }

  .hero-chip {
    padding: 8px 10px;
    font-size: 10.5px;
  }

  .hero-chip b {
    font-size: 14px;
  }

  .hero-chip--a {
    top: 8%;
  }

  .hero-chip--b {
    top: 54%;
  }

  .hero-chip--c {
    bottom: 7%;
  }

  .hero-stats dl {
    grid-template-columns: 1fr 1fr;
  }

  .hero-stats dl > div {
    padding: 20px 0 20px 18px;
  }

  .hero-stats dl > div:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .hero-stats dl > div:nth-child(n + 3) {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .hero-stats dd {
    font-size: 1.75rem;
  }

  .hero-domains {
    gap: 8px 16px;
    line-height: 1.9;
  }

  .section {
    padding: 62px 0;
  }

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

  .cap-card {
    padding: 26px 24px;
  }

  .cap-card h3 {
    font-size: 1.3rem;
  }

  .sol-row {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 14px;
    padding: 26px 0;
  }

  .sol-row__body {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
    margin-top: 0;
  }

  .sol-row__arrow {
    display: none;
  }

  .case-grid,
  .engagement-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }

  .case-card:last-child,
  .engagement-card:last-child {
    grid-column: auto;
  }

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

  .case-card__metric {
    margin-top: 22px;
  }

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

  .why-item {
    padding: 22px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .why-item:last-child {
    border-bottom: 0;
  }

  .why-item:nth-child(3),
  .why-item:nth-child(4) {
    padding-top: 22px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 30px 22px;
  }

  .footer-brand {
    grid-column: span 2;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .page-hero {
    padding: 112px 0 46px;
  }

  .page-hero h1 {
    font-size: clamp(2rem, 8.4vw, 2.7rem);
  }

  .page-hero__meta {
    gap: 10px 20px;
  }

  .service-block {
    padding: 38px 0;
  }

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

  .solution-head {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .stack-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  .about-stats > div {
    padding: 20px 18px;
  }

  .timeline::before {
    left: 59px;
  }

  .timeline-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 44px;
  }

  .timeline-item::before {
    left: 55px;
  }

  .timeline-year {
    font-size: 12.5px;
  }

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

  .team-item {
    padding: 20px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .team-item:last-child {
    border-bottom: 0;
  }

  .team-item:nth-child(3),
  .team-item:nth-child(4) {
    padding-top: 20px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .visit-info {
    padding: 26px 24px;
  }

  .map-figure {
    min-height: 250px;
  }

  .legal-layout {
    gap: 24px;
  }

  .prose h2 {
    margin-top: 34px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}