/* =========================================================
   中维创想 · 官方网站
   Static stylesheet · no external dependencies
   ========================================================= */

:root {
  --ink: #081b2b;
  --ink-2: #0c2538;
  --ink-3: #113047;
  --paper: #f5f2eb;
  --paper-soft: #faf8f3;
  --white: #ffffff;
  --text: #102432;
  --muted: #596b76;
  --mint: #74e6c4;
  --mint-deep: #24b58f;
  --blue: #6da9ff;
  --line: rgba(8, 27, 43, 0.13);
  --line-strong: rgba(8, 27, 43, 0.22);
  --line-light: rgba(255, 255, 255, 0.14);
  --container: 1180px;
  --radius: 22px;
  --font: "HarmonyOS Sans SC", "MiSans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", "Cascadia Code", Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(0.22, 0.7, 0.24, 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);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.menu-open {
  overflow: hidden;
}

h1,
h2,
h3,
p,
blockquote,
figure {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

address {
  font-style: normal;
}

button {
  font: inherit;
}

svg {
  display: block;
}

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

:focus-visible {
  outline: 2px solid var(--mint-deep);
  outline-offset: 4px;
  border-radius: 3px;
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 999;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--mint);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 0.25s var(--ease);
}

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

/* ---------------------------------
   Header
--------------------------------- */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  padding: 18px 0;
  color: var(--white);
  transition: padding 0.4s var(--ease), background 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  padding: 11px 0;
  background: rgba(8, 27, 43, 0.88);
  border-bottom-color: rgba(255, 255, 255, 0.08);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
}

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

.brand-mark {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  transition: transform 0.5s var(--ease);
}

.brand:hover .brand-mark {
  transform: rotate(-8deg);
}

.brand-text {
  display: block;
}

.brand-name {
  display: block;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.12em;
}

.brand-en {
  display: block;
  margin-top: 3px;
  font-family: var(--mono);
  font-size: 7px;
  line-height: 1.2;
  letter-spacing: 0.14em;
  opacity: 0.48;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-left: auto;
}

.primary-nav a:not(.nav-cta) {
  position: relative;
  padding: 6px 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13.5px;
  letter-spacing: 0.03em;
  transition: color 0.25s ease;
}

.primary-nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease);
}

.primary-nav a:not(.nav-cta):hover,
.primary-nav a.is-active {
  color: var(--white);
}

.primary-nav a:not(.nav-cta):hover::after,
.primary-nav a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 9px 20px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.04em;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.nav-cta:hover {
  border-color: var(--mint);
  background: var(--mint);
  color: var(--ink);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 50%;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  z-index: 120;
}

.menu-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.35s var(--ease);
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(4, 14, 22, 0.62);
  opacity: 0;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  transition: opacity 0.35s ease;
}

.nav-backdrop.is-visible {
  opacity: 1;
}

.nav-backdrop[hidden] {
  display: none;
}

/* ---------------------------------
   Hero
--------------------------------- */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100svh;
  padding: 150px 0 116px;
  overflow: hidden;
  background: var(--ink);
  color: var(--white);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.042) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.042) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 88%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 88%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  top: -18%;
  right: -10%;
  width: 72vw;
  height: 72vw;
  max-width: 980px;
  max-height: 980px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(32, 113, 178, 0.19), transparent 63%);
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  bottom: -28%;
  left: -8%;
  width: 62vw;
  height: 44vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(116, 230, 196, 0.09), transparent 66%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, 0.92fr);
  gap: 64px;
  align-items: center;
}

.hero-copy {
  max-width: 690px;
}

.hero-company {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.hero-company::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(116, 230, 196, 0.09);
}

.hero h1 {
  margin: 26px 0 30px;
  font-size: clamp(3.6rem, 6.3vw, 6.25rem);
  font-weight: 650;
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.hero h1 .accent {
  position: relative;
  color: var(--mint);
}

.hero h1 .accent::after {
  content: "";
  position: absolute;
  right: 0.03em;
  bottom: 0.06em;
  left: 0.03em;
  height: 2px;
  background: linear-gradient(90deg, var(--mint), transparent);
  opacity: 0.55;
}

.hero h1 .period {
  color: var(--mint);
}

.hero-lede {
  max-width: 610px;
  color: rgba(255, 255, 255, 0.63);
  font-size: 16.5px;
  line-height: 1.92;
}

.hero-lede strong {
  color: rgba(255, 255, 255, 0.94);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: transform 0.3s var(--ease), background 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

.btn svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.3s var(--ease);
}

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

.btn-primary {
  background: var(--mint);
  color: var(--ink);
  box-shadow: 0 12px 34px rgba(116, 230, 196, 0.14);
}

.btn-primary:hover {
  background: #8cf0d3;
  transform: translateY(-2px);
  box-shadow: 0 16px 38px rgba(116, 230, 196, 0.2);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--white);
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  max-width: 620px;
  margin-top: 46px;
  padding-top: 25px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-tags li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.hero-tags li::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--mint);
  opacity: 0.7;
}

/* Hero visual */

.hero-stage {
  position: relative;
  width: 100%;
  max-width: 560px;
  margin-left: auto;
}

.stage {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 30px;
  background:
    radial-gradient(circle at 66% 28%, rgba(42, 119, 160, 0.22), transparent 34%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.012));
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.stage::before {
  content: "";
  position: absolute;
  top: -16%;
  right: -12%;
  width: 58%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(116, 230, 196, 0.15), transparent 68%);
  filter: blur(10px);
}

.stage-grid {
  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: 42px 42px;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 20%, transparent 74%);
  mask-image: radial-gradient(circle at 50% 50%, #000 20%, transparent 74%);
}

.stage-topline,
.stage-bottom {
  position: absolute;
  right: 28px;
  left: 28px;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.33);
}

.stage-topline {
  top: 24px;
}

.stage-bottom {
  bottom: 24px;
}

.stage-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.stage-status i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(116, 230, 196, 0.08);
  animation: status-pulse 2.6s ease-in-out infinite;
}

.stage-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.stage-ring--outer {
  width: 78%;
  aspect-ratio: 1;
  border: 1px dashed rgba(116, 230, 196, 0.23);
  animation: orbit 56s linear infinite;
}

.stage-ring--inner {
  width: 58%;
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.11);
}

.stage-ring--inner::before,
.stage-ring--inner::after {
  content: "";
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 12px rgba(116, 230, 196, 0.5);
}

.stage-ring--inner::before {
  top: 10%;
  right: 17%;
}

.stage-ring--inner::after {
  bottom: 6%;
  left: 24%;
  width: 3px;
  height: 3px;
  opacity: 0.55;
}

.stage-core {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  width: 44%;
  aspect-ratio: 1;
  padding: 20px;
  border: 1px solid rgba(116, 230, 196, 0.35);
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 30%, rgba(116, 230, 196, 0.17), rgba(8, 27, 43, 0.92) 64%);
  box-shadow:
    0 0 75px rgba(116, 230, 196, 0.09),
    inset 0 0 40px rgba(116, 230, 196, 0.04);
  text-align: center;
  transform: translate(-50%, -50%);
}

.stage-core-label,
.stage-core-sub {
  color: rgba(255, 255, 255, 0.38);
  font-family: var(--mono);
  font-size: 6.5px;
  letter-spacing: 0.16em;
}

.stage-core strong {
  margin: 10px 0;
  font-size: clamp(20px, 2.4vw, 29px);
  font-weight: 550;
  line-height: 1.22;
  letter-spacing: 0.02em;
}

.stage-chip {
  position: absolute;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  background: rgba(8, 27, 43, 0.72);
  color: rgba(255, 255, 255, 0.72);
  font-size: 10px;
  letter-spacing: 0.06em;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  animation: chip-float 7s ease-in-out infinite;
}

.stage-chip i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--mint);
}

.chip-a {
  top: 18%;
  left: 5%;
}

.chip-b {
  top: 25%;
  right: 4%;
  animation-delay: -2.2s;
}

.chip-c {
  bottom: 22%;
  left: 4%;
  animation-delay: -4.4s;
}

.chip-d {
  right: 5%;
  bottom: 13%;
  animation-delay: -1.2s;
}

.hero-scroll {
  position: absolute;
  bottom: 24px;
  left: 50%;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.28);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.22em;
  transform: translateX(-50%);
}

.hero-scroll-line {
  position: relative;
  display: block;
  width: 58px;
  height: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.12);
}

.hero-scroll-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--mint);
  transform: translateX(-100%);
  animation: scroll-line 2.6s ease-in-out infinite;
}

/* ---------------------------------
   Overview strip
--------------------------------- */

.overview {
  position: relative;
  z-index: 4;
  margin-top: -54px;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 24px 60px rgba(8, 27, 43, 0.08);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.overview-item {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 154px;
  padding: 28px 30px 26px;
}

.overview-item + .overview-item {
  border-left: 1px solid var(--line);
}

.overview-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 30px;
  width: 22px;
  height: 2px;
  background: var(--mint-deep);
  opacity: 0.65;
}

.overview-label {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.overview-item strong {
  margin: 10px 0 8px;
  color: var(--ink);
  font-size: 37px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.045em;
}

.overview-item strong span {
  margin-left: 3px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0;
}

.overview-item .overview-place {
  font-size: 30px;
}

.overview-item .overview-place span {
  font-size: 18px;
}

.overview-meta {
  margin-top: auto;
  color: #8a979e;
  font-size: 10.5px;
  letter-spacing: 0.03em;
}

/* ---------------------------------
   Shared section styles
--------------------------------- */

.section {
  padding: 124px 0;
  scroll-margin-top: 84px;
}

.section-head {
  max-width: 800px;
  margin-bottom: 58px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}

.eyebrow--light {
  color: rgba(255, 255, 255, 0.5);
}

.section h2 {
  color: var(--ink);
  font-size: clamp(2.35rem, 4.4vw, 4.1rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.055em;
}

.section-lede {
  max-width: 650px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.92;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 34px;
  padding-bottom: 6px;
  border-bottom: 1px solid currentColor;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.text-link svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.3s var(--ease);
}

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

.text-link--light {
  color: var(--mint);
}

/* ---------------------------------
   Services
--------------------------------- */

.services {
  background:
    radial-gradient(circle at 90% 12%, rgba(36, 181, 143, 0.055), transparent 24%),
    var(--paper);
}

.services .section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.services .section-lede {
  margin-top: 24px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 302px;
  overflow: hidden;
  padding: 30px 29px 27px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.52);
  transition: transform 0.45s var(--ease), background 0.45s ease, box-shadow 0.45s ease, border-color 0.45s ease;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--mint-deep), var(--mint), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}

.service-card:hover {
  border-color: rgba(8, 27, 43, 0.2);
  background: var(--white);
  box-shadow: 0 22px 50px rgba(8, 27, 43, 0.075);
  transform: translateY(-5px);
}

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

.service-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(8, 27, 43, 0.09);
  border-radius: 50%;
  background: rgba(8, 27, 43, 0.035);
  color: var(--ink);
  transition: background 0.4s ease, border-color 0.4s ease;
}

.service-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.35;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-card:hover .service-icon {
  border-color: rgba(36, 181, 143, 0.35);
  background: rgba(116, 230, 196, 0.2);
}

.service-index {
  color: rgba(8, 27, 43, 0.3);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.service-card h3 {
  margin-bottom: 13px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.service-card p {
  color: var(--muted);
  font-size: 13.8px;
  line-height: 1.85;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 25px;
}

.service-tags li {
  padding: 5px 9px;
  border: 1px solid rgba(8, 27, 43, 0.09);
  border-radius: 999px;
  color: #6b7a83;
  font-size: 10px;
  letter-spacing: 0.02em;
}

/* ---------------------------------
   Solutions
--------------------------------- */

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

.solutions::before {
  content: "";
  position: absolute;
  top: -30%;
  left: 48%;
  width: 680px;
  height: 680px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(36, 181, 143, 0.1), transparent 66%);
  pointer-events: none;
}

.solutions::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -220px;
  width: 500px;
  height: 500px;
  border: 1px solid rgba(255, 255, 255, 0.055);
  border-radius: 50%;
  pointer-events: none;
}

.solutions .container {
  position: relative;
  z-index: 2;
}

.solutions-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
  gap: 88px;
  align-items: start;
}

.solutions-intro {
  position: sticky;
  top: 130px;
}

.solutions h2 {
  color: var(--white);
}

.solutions .section-lede {
  color: rgba(255, 255, 255, 0.53);
}

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

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

.solution summary {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto 28px;
  gap: 18px;
  align-items: center;
  min-height: 91px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
}

.solution summary::-webkit-details-marker {
  display: none;
}

.solution summary::marker {
  content: "";
}

.solution-num {
  color: rgba(116, 230, 196, 0.62);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.solution-title {
  color: rgba(255, 255, 255, 0.85);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.015em;
  transition: color 0.3s ease;
}

.solution summary:hover .solution-title,
.solution[open] .solution-title {
  color: var(--white);
}

.solution-meta {
  color: rgba(255, 255, 255, 0.26);
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.14em;
}

.solution-toggle {
  position: relative;
  display: block;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.solution-toggle::before,
.solution-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1px;
  background: rgba(255, 255, 255, 0.7);
  transition: transform 0.35s var(--ease);
}

.solution-toggle::before {
  transform: translate(-50%, -50%);
}

.solution-toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.solution[open] .solution-toggle {
  border-color: rgba(116, 230, 196, 0.45);
  background: rgba(116, 230, 196, 0.08);
}

.solution[open] .solution-toggle::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.solution-body {
  max-width: 650px;
  margin-left: 56px;
  padding: 0 0 32px;
  animation: detail-in 0.4s var(--ease) both;
}

.solution-body p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13.8px;
  line-height: 1.9;
}

.solution-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 18px;
}

.solution-tags li {
  padding: 5px 9px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.46);
  font-size: 10px;
}

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

.about {
  background:
    radial-gradient(circle at 8% 12%, rgba(109, 169, 255, 0.045), transparent 22%),
    var(--paper-soft);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 78px;
  align-items: start;
}

.about-visual {
  position: sticky;
  top: 128px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 570px;
  overflow: hidden;
  padding: 32px;
  border-radius: 24px;
  background:
    radial-gradient(circle at 78% 20%, rgba(49, 135, 178, 0.23), transparent 35%),
    linear-gradient(155deg, #0d2b41, var(--ink) 68%);
  color: var(--white);
}

.about-visual::before {
  content: "";
  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: 48px 48px;
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 82%);
  mask-image: linear-gradient(to bottom, #000, transparent 82%);
  pointer-events: none;
}

.about-visual::after {
  content: "";
  position: absolute;
  top: 23%;
  left: 50%;
  width: 340px;
  height: 340px;
  border: 1px solid rgba(116, 230, 196, 0.12);
  border-radius: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}

.about-visual-top,
.about-visual-bottom,
.about-monogram {
  position: relative;
  z-index: 2;
}

.about-visual-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: rgba(255, 255, 255, 0.35);
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.16em;
}

.about-monogram {
  align-self: center;
  color: transparent;
  font-size: clamp(8rem, 14vw, 12rem);
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.08em;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.15);
  -webkit-user-select: none;
  user-select: none;
}

.about-visual-bottom {
  max-width: 330px;
}

.about-rule {
  display: block;
  width: 34px;
  height: 2px;
  margin-bottom: 22px;
  background: var(--mint);
}

.about-visual blockquote {
  color: rgba(255, 255, 255, 0.92);
  font-size: 23px;
  font-weight: 450;
  line-height: 1.5;
  letter-spacing: -0.02em;
}

.about-est {
  display: block;
  margin-top: 28px;
  color: rgba(255, 255, 255, 0.32);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.18em;
}

.about-copy {
  padding-top: 10px;
}

.about-copy h2 {
  margin-bottom: 30px;
}

.about-text {
  max-width: 600px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.98;
}

.about-text + .about-text {
  margin-top: 18px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
  margin: 44px 0 0;
  border-top: 1px solid var(--line);
}

.facts > div {
  padding: 19px 0 20px;
  border-bottom: 1px solid var(--line);
}

.facts dt {
  margin-bottom: 7px;
  color: #8a979e;
  font-size: 9.5px;
  letter-spacing: 0.06em;
}

.facts dd {
  margin: 0;
  color: var(--ink);
  font-size: 13.5px;
  line-height: 1.65;
}

.facts-code {
  font-family: var(--mono);
  font-size: 11.5px !important;
  letter-spacing: -0.02em;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  margin-top: 100px;
  padding-top: 44px;
  border-top: 1px solid var(--line);
}

.principle {
  padding-right: 32px;
}

.principle + .principle {
  padding-left: 34px;
  border-left: 1px solid var(--line);
}

.principle-num {
  display: block;
  margin-bottom: 20px;
  color: var(--mint-deep);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.principle h3 {
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 600;
}

.principle p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.85;
}

/* ---------------------------------
   Process
--------------------------------- */

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

.process-head {
  max-width: 700px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  border-radius: 18px;
}

.process-step {
  position: relative;
  min-height: 238px;
  padding: 32px 31px 34px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.32);
  transition: background 0.4s ease;
}

.process-step:hover {
  background: rgba(255, 255, 255, 0.78);
}

.process-step::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--mint-deep);
  transition: width 0.5s var(--ease);
}

.process-step:hover::after {
  width: 100%;
}

.process-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 28px;
  border: 1px solid rgba(8, 27, 43, 0.12);
  border-radius: 50%;
  color: #86939b;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.05em;
}

.process-step h3 {
  margin-bottom: 11px;
  color: var(--ink);
  font-size: 19.5px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.process-step p {
  max-width: 300px;
  color: var(--muted);
  font-size: 13.3px;
  line-height: 1.85;
}

/* ---------------------------------
   Contact
--------------------------------- */

.contact {
  padding: 0 0 124px;
  background: var(--paper);
  scroll-margin-top: 84px;
}

.contact-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: 78px;
  overflow: hidden;
  padding: 72px;
  border-radius: 28px;
  background: var(--ink);
  color: var(--white);
}

.contact-panel::before {
  content: "";
  position: absolute;
  top: -36%;
  right: -8%;
  width: 680px;
  height: 680px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(116, 230, 196, 0.14), transparent 65%);
  pointer-events: none;
}

.contact-panel::after {
  content: "";
  position: absolute;
  right: -110px;
  bottom: -240px;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  pointer-events: none;
}

.contact-copy,
.contact-info {
  position: relative;
  z-index: 2;
}

.contact h2 {
  margin-bottom: 25px;
  color: var(--white);
}

.contact-lede {
  max-width: 520px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 14.5px;
  line-height: 1.9;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 33px;
}

.contact-info {
  align-self: end;
}

.contact-item {
  padding: 19px 0 21px;
  border-top: 1px solid var(--line-light);
}

.contact-item:last-child {
  padding-bottom: 0;
}

.contact-label {
  display: block;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.32);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.15em;
}

.contact-value {
  color: rgba(255, 255, 255, 0.9);
  font-size: 21px;
  font-weight: 450;
  letter-spacing: 0.01em;
  transition: color 0.25s ease;
}

a.contact-value:hover {
  color: var(--mint);
}

.contact-address {
  display: block;
  font-size: 13.5px;
  line-height: 1.8;
}

.contact-note {
  display: block;
  margin-top: 9px;
  color: rgba(255, 255, 255, 0.3);
  font-size: 10px;
}

/* ---------------------------------
   Footer
--------------------------------- */

.site-footer {
  background: var(--ink);
  color: var(--white);
  padding: 62px 0 28px;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.75fr);
  gap: 50px;
  align-items: start;
}

.footer-slogan {
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.38);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 13px 30px;
  padding-top: 9px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.52);
  font-size: 12px;
  transition: color 0.25s ease;
}

.footer-nav a:hover {
  color: var(--mint);
}

.footer-contact {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 10px;
  padding-top: 4px;
  text-align: right;
}

.footer-contact a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  transition: color 0.25s ease;
}

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

.footer-contact span {
  color: rgba(255, 255, 255, 0.34);
  font-size: 10.5px;
  line-height: 1.6;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 22px;
  margin-top: 54px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  color: rgba(255, 255, 255, 0.3);
  font-size: 9.5px;
  letter-spacing: 0.02em;
}

.footer-bottom a {
  transition: color 0.25s ease;
}

.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.7);
}

.footer-code {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.03em;
}

/* ---------------------------------
   Reveal animation
--------------------------------- */

.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  will-change: opacity, transform;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes orbit {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@keyframes chip-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

@keyframes scroll-line {
  0% { transform: translateX(-100%); }
  55%, 100% { transform: translateX(100%); }
}

@keyframes detail-in {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------------------------------
   Error page
--------------------------------- */

.error-page {
  display: grid;
  min-height: 100svh;
  padding: 40px 24px;
  place-items: center;
  background:
    radial-gradient(circle at 76% 28%, rgba(36, 181, 143, 0.13), transparent 32%),
    var(--ink);
  color: var(--white);
}

.error-inner {
  max-width: 640px;
  text-align: center;
}

.error-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 58px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.error-code {
  color: var(--mint);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.25em;
}

.error-inner h1 {
  margin: 18px 0 20px;
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.055em;
}

.error-inner p {
  max-width: 460px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.48);
  font-size: 14px;
  line-height: 1.9;
}

.error-inner .btn {
  margin-top: 32px;
}

/* ---------------------------------
   Responsive
--------------------------------- */

@media (max-width: 1120px) {
  .hero-inner {
    gap: 42px;
  }

  .solutions-layout {
    gap: 58px;
  }

  .about-grid {
    gap: 52px;
  }

  .contact-panel {
    gap: 52px;
    padding: 58px;
  }
}

@media (max-width: 960px) {
  .hero {
    min-height: auto;
    padding: 140px 0 120px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 58px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-stage {
    max-width: 470px;
    margin: 0 auto;
  }

  .hero-scroll {
    display: none;
  }

  .solutions-layout {
    grid-template-columns: 1fr;
    gap: 46px;
  }

  .solutions-intro {
    position: static;
    max-width: 720px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .about-visual {
    position: relative;
    top: auto;
    min-height: 480px;
  }

  .about-monogram {
    font-size: 10rem;
  }

  .principles {
    margin-top: 72px;
  }

  .contact-panel {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 56px;
  }

  .contact-info {
    max-width: 640px;
  }

  .contact-item {
    padding: 17px 0 19px;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
  }

  .footer-contact {
    align-items: flex-start;
    grid-column: 1 / -1;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px 24px;
    text-align: left;
  }

  .footer-contact span {
    flex-basis: 100%;
  }

  .footer-bottom {
    flex-wrap: wrap;
    gap: 10px 24px;
  }
}

@media (max-width: 900px) {
  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 110;
    display: flex;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    width: min(86vw, 370px);
    margin: 0;
    padding: 108px 30px 38px;
    background: var(--ink);
    box-shadow: -30px 0 80px rgba(0, 0, 0, 0.28);
    transform: translateX(103%);
    visibility: hidden;
    transition: transform 0.45s var(--ease), visibility 0.45s;
  }

  .primary-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .primary-nav a:not(.nav-cta) {
    padding: 17px 0;
    border-bottom: 1px solid var(--line-light);
    color: rgba(255, 255, 255, 0.72);
    font-size: 19px;
  }

  .primary-nav a:not(.nav-cta)::after {
    display: none;
  }

  .primary-nav .nav-cta {
    min-height: 50px;
    margin-top: 28px;
    border-color: var(--mint);
    background: var(--mint);
    color: var(--ink);
    font-size: 14px;
  }

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

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

  .principles {
    grid-template-columns: 1fr;
    gap: 0;
    padding-top: 0;
  }

  .principle {
    padding: 26px 0;
    border-top: 1px solid var(--line);
  }

  .principle + .principle {
    padding-left: 0;
    border-left: 0;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 40px), var(--container));
  }

  .hero {
    padding: 126px 0 92px;
  }

  .hero h1 {
    font-size: clamp(3.05rem, 12vw, 4.3rem);
    letter-spacing: -0.06em;
  }

  .hero-lede {
    font-size: 15.5px;
  }

  .hero-stage {
    display: none;
  }

  .hero-company {
    font-size: 10px;
    letter-spacing: 0.12em;
  }

  .hero-tags {
    margin-top: 38px;
  }

  .overview {
    margin-top: -42px;
  }

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

  .overview-item {
    min-height: 132px;
    padding: 23px 22px 21px;
  }

  .overview-item + .overview-item {
    border-left: 0;
  }

  .overview-item:nth-child(even) {
    border-left: 1px solid var(--line);
  }

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

  .overview-item::after {
    left: 22px;
  }

  .overview-item strong {
    font-size: 31px;
  }

  .overview-item .overview-place {
    font-size: 25px;
  }

  .section {
    padding: 88px 0;
  }

  .section-head {
    margin-bottom: 42px;
  }

  .section h2 {
    font-size: clamp(2.15rem, 8.5vw, 3.3rem);
  }

  .section-lede {
    margin-top: 20px;
    font-size: 14.5px;
  }

  .eyebrow {
    margin-bottom: 18px;
    font-size: 8.5px;
  }

  .service-card {
    min-height: 280px;
  }

  .solution summary {
    grid-template-columns: 30px minmax(0, 1fr) 26px;
    gap: 12px;
    min-height: 84px;
  }

  .solution-meta {
    display: none;
  }

  .solution-title {
    font-size: 17px;
  }

  .solution-body {
    margin-left: 0;
    padding: 0 0 28px 42px;
  }

  .about-visual {
    min-height: 430px;
    padding: 26px;
  }

  .about-visual blockquote {
    font-size: 21px;
  }

  .about-monogram {
    font-size: 8.5rem;
  }

  .principles {
    margin-top: 60px;
  }

  .contact {
    padding-bottom: 88px;
  }

  .contact-panel {
    gap: 42px;
    padding: 42px 34px;
    border-radius: 22px;
  }

  .contact h2 {
    margin-bottom: 21px;
  }

  .contact-value {
    font-size: 19px;
  }

  .site-footer {
    padding-top: 50px;
  }

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

  .footer-contact {
    grid-column: auto;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    margin-top: 40px;
  }
}

@media (max-width: 620px) {
  .services-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }

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

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

  .facts > div {
    padding: 17px 0 18px;
  }

  .facts > div:last-child {
    border-bottom: 0;
  }

  .contact-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-actions .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .site-header {
    padding: 13px 0;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .brand-name {
    font-size: 16px;
  }

  .brand-en {
    font-size: 6.5px;
  }

  .hero {
    padding-top: 112px;
  }

  .hero h1 {
    margin: 22px 0 24px;
    font-size: clamp(2.8rem, 13vw, 3.5rem);
  }

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

  .hero-tags {
    gap: 11px 18px;
    padding-top: 20px;
  }

  .overview-item {
    padding: 20px 18px;
  }

  .overview-item strong {
    font-size: 28px;
  }

  .overview-item .overview-place {
    font-size: 22px;
  }

  .overview-meta {
    font-size: 9.5px;
  }

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

  .solution-body {
    padding-left: 0;
  }

  .about-visual {
    min-height: 380px;
    padding: 22px;
  }

  .about-monogram {
    font-size: 7rem;
  }

  .about-visual blockquote {
    font-size: 19px;
  }

  .contact-panel {
    padding: 36px 24px;
  }

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

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

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

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

/* 2026-10-26 删除企业注册信息后的布局适配 */
.overview-item:only-child {
  grid-column: 1 / -1;
  border-left: 0;
  border-bottom: 0;
}

.contact-copy:only-child {
  grid-column: 1 / -1;
  max-width: 720px;
}