@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;700&family=Noto+Serif+SC:wght@600;700&display=swap");

:root {
  --bg: #f3f5fa;
  --surface: #ffffff;
  --surface-2: #f7f9fd;
  --text: #1c2433;
  --muted: #5c677d;
  --line: #dbe3f2;
  --line-strong: #b9c7e3;
  --primary: #2848c7;
  --primary-dark: #1f389e;
  --primary-soft: #e9efff;
  --accent: #12a6b5;
  --accent-soft: #e4f7fa;
  --radius-lg: 24px;
  --radius: 16px;
  --radius-sm: 12px;
  --shell: 1160px;
  --shadow: 0 18px 48px rgba(18, 34, 72, 0.1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.7;
  background:
    radial-gradient(1200px 680px at 92% -8%, rgba(40, 72, 199, 0.14), transparent 62%),
    radial-gradient(820px 480px at -8% 12%, rgba(18, 166, 181, 0.12), transparent 65%),
    linear-gradient(180deg, #f9fbff 0%, var(--bg) 100%);
  overflow-x: hidden;
}

a,
p,
li,
th,
td,
.footer-desc,
.metric .value {
  overflow-wrap: anywhere;
  word-break: break-word;
}

a {
  color: var(--primary-dark);
  text-decoration-color: rgba(40, 72, 199, 0.35);
}

a:hover {
  text-decoration-color: rgba(40, 72, 199, 0.82);
}

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

.shell {
  width: min(100% - 2rem, var(--shell));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  background: rgba(249, 252, 255, 0.9);
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: 0.72rem;
  padding: 0.86rem 0;
}

.brand {
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  flex-direction: column;
  min-width: 0;
}

.brand-main {
  font-family: "Noto Serif SC", serif;
  font-size: 1.02rem;
  letter-spacing: 0.01em;
}

.brand-sub {
  margin-top: 0.08rem;
  color: var(--muted);
  font-size: 0.79rem;
  font-family: "IBM Plex Sans", sans-serif;
}

.menu-toggle {
  display: none;
}

.nav-backdrop {
  display: none;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
}

.main-nav a {
  text-decoration: none;
  color: #2a3348;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.3rem 0.72rem;
  font-size: 0.9rem;
  transition: 0.18s ease;
}

.main-nav a:hover {
  border-color: var(--line);
  background: #fff;
}

.main-nav a[aria-current="page"] {
  color: var(--primary-dark);
  border-color: var(--line-strong);
  background: var(--primary-soft);
  font-weight: 600;
}

.page {
  padding: 1.28rem 0 2.6rem;
}

.hero {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 1.22rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(150deg, rgba(40, 72, 199, 0.08) 0%, rgba(18, 166, 181, 0.06) 46%, rgba(255, 255, 255, 0.95) 100%),
    #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  right: -140px;
  top: -110px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(40, 72, 199, 0.16), transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-block;
  border-radius: 999px;
  border: 1px solid rgba(40, 72, 199, 0.22);
  background: #f0f4ff;
  color: #2a428f;
  padding: 0.2rem 0.62rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: "IBM Plex Sans", sans-serif;
}

.hero h1,
.page-title {
  margin: 0.65rem 0 0;
  line-height: 1.3;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1.68rem, 1.18rem + 2vw, 2.66rem);
  max-width: 18ch;
}

.hero p {
  margin: 0.68rem 0 0;
  color: var(--muted);
  max-width: 64ch;
}

.section {
  margin-top: 1.06rem;
}

.section-head {
  margin: 0 0 0.62rem;
}

.section-title {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1.2rem, 1.02rem + 0.8vw, 1.72rem);
}

.section-intro {
  margin: 0.34rem 0 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 0.82rem;
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.grid-4 {
  grid-template-columns: 1fr;
}

.card {
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 0.96rem;
  box-shadow: 0 10px 28px rgba(22, 38, 74, 0.06);
}

.card h2,
.card h3 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
}

.card h3 {
  font-size: 1.06rem;
}

.card p {
  margin: 0.52rem 0 0;
  color: var(--muted);
}

.card ul {
  margin: 0.5rem 0 0;
  padding-left: 1.08rem;
}

.card li + li {
  margin-top: 0.32rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.86rem;
}

.btn,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: var(--radius-sm);
  padding: 0.54rem 0.9rem;
  font-size: 0.9rem;
  font-family: "IBM Plex Sans", sans-serif;
  transition: 0.2s ease;
}

.btn {
  color: #fff;
  border: 1px solid var(--primary);
  background: linear-gradient(130deg, var(--primary), #345ee6);
}

.btn:hover {
  border-color: var(--primary-dark);
  background: linear-gradient(130deg, var(--primary-dark), #2649bd);
}

.btn-outline {
  color: #34415e;
  border: 1px solid #cfd9ed;
  background: #fff;
}

.btn-outline:hover {
  border-color: #9bb1e0;
  color: var(--primary-dark);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.64rem;
}

.metric {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-2);
  padding: 0.7rem;
}

.metric .label {
  margin: 0;
  color: #67728a;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: "IBM Plex Sans", sans-serif;
}

.metric .value {
  margin: 0.26rem 0 0;
  font-size: 1.02rem;
  color: #233049;
  font-weight: 700;
}

.list {
  margin: 0.5rem 0 0;
  padding-left: 1.08rem;
}

.list li + li {
  margin-top: 0.32rem;
}

.process {
  counter-reset: step;
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
}

.process li {
  position: relative;
  padding: 0 0 0.9rem 2.2rem;
}

.process li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.02rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  border: 1px solid #9fb2df;
  background: #f2f6ff;
  color: #2f488d;
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 700;
}

.process li:last-child {
  padding-bottom: 0;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.58rem;
}

.table th,
.table td {
  border-bottom: 1px solid #e7edf8;
  padding: 0.54rem 0.46rem;
  text-align: left;
  vertical-align: top;
}

.table th {
  width: 32%;
  color: #607089;
  font-size: 0.87rem;
  font-weight: 600;
}

.table td {
  font-size: 0.92rem;
  color: #263148;
}

.note {
  margin-top: 0.68rem;
  border-radius: 10px;
  border: 1px solid #d9e6ff;
  background: #f5f9ff;
  color: #455a7d;
  padding: 0.7rem;
}

.policy-meta {
  margin-top: 0.44rem;
  color: #5f6d85;
}

.policy-stack {
  display: grid;
  gap: 0.72rem;
}

.policy-block {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 14px;
  padding: 0.86rem;
}

.policy-block h2 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: 1.05rem;
}

.policy-block p {
  margin: 0.5rem 0 0;
  color: #55637b;
}

.policy-block ul {
  margin: 0.48rem 0 0;
  padding-left: 1.08rem;
}

.policy-block li + li {
  margin-top: 0.3rem;
}

.footer {
  border-top: 1px solid var(--line);
  background: #f1f4fa;
}

.footer-inner {
  padding: 1.14rem 0 1.42rem;
}

.footer-grid {
  display: grid;
  gap: 0.84rem;
}

.footer-brand {
  font-family: "Noto Serif SC", serif;
  color: #25324a;
}

.footer-desc,
.footer-copy {
  margin: 0.38rem 0 0;
  color: #5f6878;
  font-size: 0.9rem;
  line-height: 1.56;
}

.footer-title {
  margin: 0;
  color: #3a485f;
  font-size: 0.94rem;
}

.footer-links {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0;
}

.footer-links li + li {
  margin-top: 0.26rem;
}

.footer-links a {
  text-decoration: none;
  color: #516079;
}

.footer-links a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

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

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 760px) {
  .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .hero {
    padding: 1.34rem;
  }

  .hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: end;
  }

  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.18fr 0.86fr 0.86fr;
  }
}

@media (max-width: 759px) {
  .shell {
    width: min(100% - 1.4rem, var(--shell));
  }

  .header-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    row-gap: 0.55rem;
    column-gap: 0.48rem;
    padding: 0.7rem 0;
  }

  .brand-main {
    font-size: 0.9rem;
  }

  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.24rem;
    width: 2.2rem;
    height: 2.2rem;
    border: 1px solid #cfd9ed;
    background: #fff;
    border-radius: 10px;
    cursor: pointer;
    padding: 0.45rem;
  }

  .menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: #2f3f61;
  }

  .main-nav {
    grid-column: 1 / -1;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    padding: 0.72rem;
    border: 1px solid #d4def1;
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 10px 26px rgba(24, 40, 78, 0.12);
    position: relative;
    z-index: 40;
  }

  .site-header.nav-ready .main-nav {
    display: none;
  }

  .site-header.nav-ready.menu-open .main-nav {
    display: flex;
  }

  .main-nav a {
    display: block;
    border-radius: 10px;
    border: 1px solid transparent;
    padding: 0.56rem 0.64rem;
    font-size: 0.95rem;
  }

  .nav-backdrop {
    display: none;
  }

  .site-header.nav-ready.menu-open .nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(10, 20, 40, 0.24);
    z-index: 20;
  }

  .hero {
    padding: 0.95rem;
    border-radius: 16px;
  }

  .hero::before {
    right: -190px;
    top: -170px;
    width: 300px;
    height: 300px;
    opacity: 0.7;
  }

  .hero h1,
  .page-title {
    max-width: 100%;
    font-size: clamp(1.38rem, 5.4vw, 1.92rem);
  }

  .cta-row {
    gap: 0.48rem;
  }

  .cta-row .btn,
  .cta-row .btn-outline {
    width: 100%;
  }

  .card,
  .policy-block {
    padding: 0.82rem;
  }

  .footer-inner {
    padding: 1rem 0 1.3rem;
  }

  .footer-grid {
    gap: 0.68rem;
  }

  .table,
  .table tbody,
  .table tr,
  .table th,
  .table td {
    display: block;
    width: 100%;
  }

  .table th,
  .table td {
    border-bottom: none;
    padding-left: 0;
    padding-right: 0;
  }

  .table tr + tr {
    border-top: 1px solid #e7edf8;
  }
}

@media (max-width: 430px) {
  .shell {
    width: min(100% - 1rem, var(--shell));
  }

  .header-inner {
    padding: 0.6rem 0;
  }

  .brand-main {
    font-size: 0.84rem;
  }

  .main-nav a {
    font-size: 0.92rem;
  }

  .hero {
    padding: 0.86rem;
  }

  .section {
    margin-top: 0.86rem;
  }

  .footer-desc,
  .footer-copy {
    font-size: 0.84rem;
  }
}

@media (min-width: 431px) and (max-width: 759px) {
  .hero {
    padding: 1.02rem;
  }

  .main-nav {
    padding: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(8px);
    animation: rise 0.5s ease forwards;
  }

  .delay-1 {
    animation-delay: 0.08s;
  }

  .delay-2 {
    animation-delay: 0.16s;
  }
}

:focus-visible {
  outline: 2px solid #355cda;
  outline-offset: 2px;
}