:root {
  --brand: #0d9f6e;
  --brand-deep: #087a54;
  --brand-soft: #e8f8f1;
  --ink: #14231c;
  --muted: #5b6b63;
  --line: #d7e5de;
  --paper: #f4faf7;
  --white: #ffffff;
  --warm: #c45c26;
  --max: 960px;
  --font: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  --display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font: 16px/1.7 var(--font);
  background:
    radial-gradient(1200px 480px at 10% -10%, #d9f3e8 0%, transparent 55%),
    radial-gradient(900px 420px at 100% 0%, #eef6f2 0%, transparent 50%),
    var(--paper);
  min-height: 100vh;
}

a {
  color: var(--brand-deep);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(244, 250, 247, 0.88);
  border-bottom: 1px solid rgba(215, 229, 222, 0.8);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.brand span {
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

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

/* Hero */
.hero {
  padding: 56px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  color: var(--brand-deep);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 0 0 16px;
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.25;
  font-weight: 700;
}

.hero .lead {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

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

.btn-primary:hover {
  background: var(--brand-deep);
  text-decoration: none;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--brand-deep);
  border-color: var(--line);
}

.btn-ghost:hover {
  background: var(--brand-soft);
  text-decoration: none;
}

.hero-panel {
  background: linear-gradient(160deg, #0d9f6e 0%, #0b6f4f 100%);
  color: #fff;
  border-radius: 20px;
  padding: 28px 24px;
  box-shadow: 0 18px 40px rgba(8, 122, 84, 0.22);
}

.hero-panel h2 {
  margin: 0 0 10px;
  font-size: 1.25rem;
}

.hero-panel p {
  margin: 0 0 18px;
  opacity: 0.92;
  font-size: 0.95rem;
}

.hero-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-panel li {
  position: relative;
  padding: 8px 0 8px 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.95rem;
}

.hero-panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #b8f0d6;
}

/* Sections */
.section {
  padding: 36px 0;
}

.section h2 {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: 1.55rem;
}

.section .sub {
  margin: 0 0 22px;
  color: var(--muted);
  max-width: 40em;
}

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

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 16px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  counter-reset: step;
}

.step {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 16px;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  margin-bottom: 8px;
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.step h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.info-box {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 18px;
}

.info-box dl {
  margin: 0;
  display: grid;
  gap: 12px;
}

.info-box dt {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0 0 2px;
}

.info-box dd {
  margin: 0;
  font-weight: 600;
}

/* Legal pages */
.page-hero {
  padding: 36px 0 10px;
}

.page-hero h1 {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
}

.page-hero p {
  margin: 0;
  color: var(--muted);
}

.prose {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 20px 28px;
  margin: 18px 0 40px;
}

.prose h2 {
  margin: 22px 0 10px;
  font-size: 1.08rem;
  border-left: 4px solid var(--brand);
  padding-left: 10px;
}

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

.prose h3 {
  margin: 16px 0 8px;
  font-size: 1rem;
}

.prose p,
.prose li {
  color: #24332c;
}

.prose ol {
  margin: 8px 0 14px;
  padding-left: 1.35em;
}

.prose li {
  margin-bottom: 8px;
}

.prose .meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.note {
  background: var(--brand-soft);
  border: 1px solid #b7eb8f;
  padding: 12px;
  border-radius: 8px;
  margin: 12px 0;
  font-size: 0.95rem;
  color: #135200;
}

.part-title {
  text-align: center;
  font-size: 1.12rem;
  font-weight: 700;
  margin: 28px 0 8px;
}

hr.sep {
  border: none;
  border-top: 1px solid var(--line);
  margin: 24px 0;
}

/* Footer */
.site-footer {
  margin-top: 20px;
  border-top: 1px solid var(--line);
  background: #ecf5f0;
  padding: 28px 0 34px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 20px;
}

.site-footer h3 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 0.95rem;
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li + li {
  margin-top: 6px;
}

.site-footer a {
  color: var(--muted);
}

.site-footer a:hover {
  color: var(--brand-deep);
}

.beian {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
}

@media (max-width: 820px) {
  .hero-grid,
  .cards,
  .steps,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 36px;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
  }
}