/* 序境游戏科技 — 浅色科技风 PC 官网。品牌位为文字，不使用图片。 */

:root {
  --bg: #f3f6fb;
  --card: #ffffff;
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --line: rgba(15, 23, 42, 0.08);
  --line-strong: rgba(15, 23, 42, 0.16);
  --accent: #2563eb;
  --accent-deep: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.1);
  --footer: #0b1220;
  --footer-text: #e2e8f0;
  --max: 1160px;
  --nav-h: 72px;
  --radius: 12px;
  --sans: "PingFang SC", "Hiragino Sans GB", "Segoe UI", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", "Menlo", "Consolas", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 1200px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  background:
    radial-gradient(720px 360px at 92% -4%, rgba(37, 99, 235, 0.16), transparent 62%),
    radial-gradient(520px 280px at 0% 18%, rgba(14, 165, 233, 0.08), transparent 60%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: var(--max);
  margin: 0 auto;
}

.topbar {
  height: 34px;
  background: var(--footer);
  color: #cbd5e1;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.topbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar strong {
  font-weight: 500;
  color: #f8fafc;
}

.topbar span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #94a3b8;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(12px);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

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

.brand {
  display: flex;
  align-items: center;
}

.brand-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  min-height: 42px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  line-height: 1;
}

.brand-text strong {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.brand-text span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav a {
  position: relative;
  font-size: 14px;
  color: var(--ink-soft);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

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

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

.nav .nav-cta {
  margin-left: 4px;
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
}

.nav .nav-cta::after {
  display: none;
}

.nav .nav-cta:hover,
.nav .nav-cta.is-active {
  background: var(--accent-deep);
  color: #fff;
}

.home-hero {
  padding: 64px 0 28px;
}

.home-hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 56px;
  align-items: center;
}

.home-hero-copy .hero-lead {
  margin-top: 18px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
}

.hero-desc {
  max-width: 520px;
  margin: 12px 0 0;
  color: var(--ink-soft);
}

.home-board {
  background: linear-gradient(165deg, #152033 0%, #0b1220 70%);
  color: #e2e8f0;
  border-radius: 20px;
  padding: 26px 28px 8px;
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.16);
}

.home-board-label {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #93c5fd;
}

.home-board ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.home-board li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 8px;
  align-items: start;
  padding: 20px 0;
  border-top: 1px solid rgba(226, 232, 240, 0.12);
}

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

.home-board em {
  font-family: var(--mono);
  font-style: normal;
  font-size: 14px;
  color: #60a5fa;
  padding-top: 3px;
}

.home-board strong {
  display: block;
  color: #fff;
  font-size: 20px;
  font-weight: 650;
}

.home-board li span {
  display: block;
  margin-top: 4px;
  color: #94a3b8;
  font-size: 14px;
}

.home-intro {
  padding: 12px 0 8px;
}

.home-intro-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 36px;
  align-items: start;
  padding: 36px 0 8px;
  border-top: 1px solid var(--line);
}

.home-intro h2 {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
}

.home-intro p {
  margin: 0 0 12px;
  color: var(--ink-soft);
  font-size: 16px;
}

.home-intro p:last-child {
  margin-bottom: 0;
}

.home-section {
  padding: 52px 0 8px;
}

.home-section-last {
  padding-bottom: 72px;
}

.home-head {
  margin-bottom: 20px;
}

.home-head h2 {
  margin: 0;
  font-size: 32px;
  font-weight: 700;
}

.home-head p {
  margin: 8px 0 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 15px;
}

.principle-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

.principle-strip article {
  padding: 26px 22px 24px;
  border-right: 1px solid var(--line);
}

.principle-strip article:last-child {
  border-right: 0;
}

.principle-strip span {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.principle-strip h3 {
  margin: 14px 0 8px;
  font-size: 18px;
  font-weight: 650;
}

.principle-strip p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.home-contact {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: stretch;
  margin-top: 28px;
  padding: 36px 40px;
  border-radius: 20px;
  background: #0f172a;
  color: #e2e8f0;
}

.home-contact h2 {
  margin: 0 0 10px;
  color: #fff;
  font-size: 32px;
  font-weight: 700;
}

.home-contact > div > p {
  margin: 0 0 22px;
  color: #94a3b8;
}

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

.home-links a {
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  color: #e2e8f0;
  font-size: 13px;
}

.home-links a:hover {
  border-color: #93c5fd;
  color: #fff;
}

.home-contact .contact-list {
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
  margin: 0;
}

.home-contact .contact-list li {
  flex: 1;
  align-items: center;
  min-height: 92px;
  padding: 16px 0;
  border-top-color: rgba(226, 232, 240, 0.14);
}

.home-contact .contact-list .v {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
}

.home-contact .contact-list .k {
  color: #94a3b8;
}

.home-contact .contact-list a {
  color: #93c5fd;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 4px 10px 4px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.kicker i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

.hero h1 {
  margin: 0;
  font-size: 64px;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.02em;
}

.hero-legal {
  margin: 14px 0 0;
  font-size: 18px;
  font-weight: 600;
}

.hero-lead {
  max-width: 560px;
  margin: 16px 0 0;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-deep);
  border-color: var(--accent-deep);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.registry {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px 24px 8px;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.06);
}

.registry-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.registry-head strong {
  font-size: 16px;
  font-weight: 650;
}

.status-chip {
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.registry dl {
  margin: 0;
}

.registry dl div {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.registry dl div:last-child {
  border-bottom: 0;
}

.registry dt {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.registry dd {
  margin: 0;
  font-size: 14px;
  font-weight: 550;
}

.fact-strip {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.fact-strip article {
  padding: 18px 18px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.fact-strip span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
}

.fact-strip strong {
  display: block;
  font-size: 15px;
  font-weight: 650;
  line-height: 1.45;
}

.section {
  padding: 72px 0;
}

.section-head {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  margin-bottom: 28px;
  align-items: end;
}

.section-head .label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-head h2 {
  margin: 0;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.section-head p {
  margin: 8px 0 0;
  max-width: 680px;
  color: var(--ink-soft);
}

.biz-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.biz-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  min-height: 220px;
  padding: 28px 24px 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.biz-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #38bdf8);
}

.biz-item em {
  font-family: var(--mono);
  font-style: normal;
  font-size: 18px;
  font-weight: 650;
  color: var(--accent);
}

.biz-item h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 650;
}

.biz-item p {
  margin: 0;
  color: var(--ink-soft);
}

.value-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.value-item {
  min-height: 196px;
  padding: 22px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.value-item h3 {
  margin: 18px 0 8px;
  font-size: 18px;
  font-weight: 650;
}

.value-item p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.value-item span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.contact-band {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 28px 24px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
}

.panel h3 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 700;
}

.panel > p {
  margin: 0 0 16px;
  color: var(--ink-soft);
}

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

.contact-list li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.contact-list .k {
  color: var(--muted);
  font-size: 13px;
}

.contact-list a {
  color: var(--accent-deep);
}

.contact-list a:hover {
  text-decoration: underline;
}

.panel-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.page-hero {
  padding: 48px 0 28px;
}

.page-hero h1 {
  margin: 0;
  font-size: 42px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-hero p {
  max-width: 720px;
  margin: 12px 0 0;
  color: var(--ink-soft);
}

.page-hero p.is-full {
  max-width: none;
}

.page-section {
  padding: 12px 0 80px;
}

.split,
.contact-layout {
  display: grid;
  gap: 16px;
  align-items: start;
}

.split {
  grid-template-columns: 1.15fr 0.85fr;
}

.about-pair {
  grid-template-columns: 1fr 1fr;
  align-items: stretch;
}

.about-card-title {
  margin: 0 0 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
}

.about-card .prose h3 {
  margin: 22px 0 10px;
  font-size: 16px;
  font-weight: 650;
  color: var(--ink);
}

.about-pair aside.about-card {
  display: flex;
  flex-direction: column;
}

.about-pair aside.about-card .info-table,
.about-pair aside.about-card .info-table tbody {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
}

.about-pair aside.about-card .info-table tr {
  display: grid;
  grid-template-columns: 108px 1fr;
  align-items: center;
  flex: 0 0 auto;
  min-height: 72px;
  border-bottom: 1px solid var(--line);
}

.about-note {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  margin-top: 16px;
  padding: 20px 22px;
  border-radius: 12px;
  background: var(--accent-soft);
}

.about-note strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 650;
}

.about-note p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.about-pair aside.about-card .info-table tr:last-child {
  border-bottom: 0;
}

.about-pair aside.about-card .info-table th,
.about-pair aside.about-card .info-table td {
  padding: 10px 0;
  border-bottom: 0;
}

.contact-layout {
  grid-template-columns: 0.9fr 1.1fr;
  align-items: stretch;
}

.contact-layout .contact-info {
  display: flex;
  flex-direction: column;
}

.contact-layout .contact-info .contact-list {
  flex: 0 0 auto;
}

.contact-layout .contact-info .contact-list li {
  align-items: center;
  min-height: 84px;
  padding: 16px 0;
}

.contact-layout .contact-info .contact-list .v {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
}

.contact-note {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  margin-top: 8px;
  padding: 22px 22px;
  border-radius: 12px;
  background: var(--accent-soft);
}

.contact-note strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 650;
}

.contact-note p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.prose h2,
.legal h2 {
  margin: 28px 0 10px;
  font-size: 22px;
  font-weight: 700;
}

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

.prose p,
.legal p,
.prose ul,
.legal ul {
  margin: 0 0 12px;
  color: var(--ink-soft);
}

.prose ul,
.legal ul {
  padding-left: 1.2em;
}

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

.info-table {
  width: 100%;
  border-collapse: collapse;
}

.info-table th,
.info-table td {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-weight: 400;
}

.info-table th {
  width: 132px;
  color: var(--muted);
  font-size: 13px;
}

.legal {
  max-width: 860px;
}

.legal-meta {
  margin-bottom: 20px;
  padding: 14px 16px;
  border-radius: 10px;
  background: var(--accent-soft);
}

.legal-meta p {
  margin: 0 0 4px;
  color: var(--ink);
}

.legal h3 {
  margin: 16px 0 8px;
  font-size: 16px;
  font-weight: 650;
  color: var(--ink);
}

.form-field {
  margin-bottom: 14px;
}

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

.form-field label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--muted);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #f8fafc;
  outline: none;
}

.form-field textarea {
  min-height: 120px;
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-hint {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 13px;
}

.form-msg {
  min-height: 1.4em;
  margin-top: 12px;
  font-size: 14px;
}

.form-msg.is-ok {
  color: #15803d;
}

.form-msg.is-err {
  color: #dc2626;
}

.site-footer {
  background: var(--footer);
  color: var(--footer-text);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 1fr;
  gap: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.12);
}

.footer-brand strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 650;
}

.footer-brand p,
.footer-col p {
  margin: 0;
  color: #94a3b8;
  font-size: 14px;
}

.footer-col h4 {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #64748b;
}

.footer-col a {
  display: block;
  margin: 6px 0;
  color: var(--footer-text);
  font-size: 14px;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  color: #94a3b8;
  font-size: 13px;
}

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

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}