@import url('https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@300;400;500;600;700&family=Rubik:wght@300;400;500;600;700&display=swap');

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

:root {
  --mint: #b4fde1;
  --sky: #add8e6;
  --ink: #172620;
  --paper: #f4fdf9;
  --paper2: #e7f8ef;
  --white: #ffffff;
  --tint: rgba(23, 38, 32, 0.13);
  --pop: inset -2px -2px 8px var(--tint), 5px 6px 14px rgba(23, 38, 32, 0.16);
  --pop-sm: inset -2px -2px 6px var(--tint), 3px 4px 9px rgba(23, 38, 32, 0.14);
  --b: 3px solid var(--ink);
}

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

body {
  margin: 0;
  font-family: 'Rubik', 'Nunito Sans', system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(1100px 480px at 4% -12%, var(--mint), rgba(180, 253, 225, 0) 70%),
    radial-gradient(880px 440px at 102% -4%, var(--sky), rgba(173, 216, 230, 0) 64%),
    var(--paper);
  background-attachment: fixed;
}

a { color: var(--ink); }
img { display: block; max-width: 100%; height: auto; }

h1, h2, h3, h4 { font-family: 'Rubik', 'Nunito Sans', system-ui, sans-serif; }

hr {
  border: 0;
  height: 4px;
  width: 64px;
  margin: 0 0 14px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--mint), var(--sky));
}

/* ---------- 顶部两行 ---------- */
.mast {
  position: relative;
  z-index: 30;
  padding-bottom: 10px;
  background: linear-gradient(180deg, var(--mint), var(--paper2));
  border-bottom: var(--b);
  box-shadow: 0 6px 18px rgba(23, 38, 32, 0.13);
}

.strip {
  margin: 0;
  padding: 7px 16px;
  text-align: center;
  font-size: 16px;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--mint);
  background: var(--ink);
}

.brandrow {
  display: flex;
  justify-content: center;
  padding: 12px 14px 8px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 7px 20px 7px 11px;
  text-decoration: none;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
  background: var(--white);
  border: var(--b);
  border-radius: 999px;
  box-shadow: var(--pop);
  transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.22s ease-out;
}

.brand:hover { transform: translateY(-2px) scale(1.02); background: var(--mint); }

.brand-dot {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: var(--b);
  background: conic-gradient(from 200deg, var(--mint), var(--sky), var(--mint));
  box-shadow: inset -2px -2px 6px var(--tint);
}

.menurow { padding: 0 12px; }

.menu ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.menu a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 8px 15px;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  border: var(--b);
  border-radius: 999px;
  background: var(--white);
  box-shadow: var(--pop-sm);
  transition: transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.18s ease-out;
}

.menu a::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  background: var(--sky);
}

.menu a:hover { background: var(--mint); transform: translateY(-2px); }

/* ---------- 容器 ---------- */
.wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 16px;
}

main { display: block; }

main section,
main article section { scroll-margin-top: 132px; }

/* ---------- 首屏 ---------- */
.hero {
  display: flex;
  align-items: center;
  min-height: 45vh;
  padding: 24px 0 8px;
}

.hero-body {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 22px;
  align-items: center;
}

.card {
  padding: 16px;
  background: var(--white);
  border: var(--b);
  border-radius: 0;
  box-shadow: var(--pop);
}

.hero-media {
  display: grid;
  place-items: center;
  min-height: 230px;
  padding: 10px;
  overflow: hidden;
  background: linear-gradient(155deg, var(--mint), var(--sky));
}

.hero-img {
  width: 100%;
  max-height: 340px;
  object-fit: cover;
  border: var(--b);
  border-radius: 0;
  box-shadow: var(--pop-sm);
}

.blob {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  border: var(--b);
  background: radial-gradient(circle at 34% 28%, #ffffff, var(--mint) 58%, var(--sky));
  box-shadow: var(--pop);
  animation: soft-bounce 3.6s cubic-bezier(0.34, 1.56, 0.64, 1) infinite;
}

@keyframes soft-bounce {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-10px) scale(1.03); }
}

.hero-txt {
  position: relative;
  overflow: hidden;
  padding: 10px 6px;
  text-align: center;
}

.hero-ghost {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(46px, 10vw, 118px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  white-space: nowrap;
  overflow: hidden;
  color: rgba(23, 38, 32, 0.1);
  pointer-events: none;
}

.hero-txt h1 {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-size: clamp(30px, 5.2vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.lead {
  position: relative;
  z-index: 1;
  max-width: 34ch;
  margin: 0 auto;
  font-size: 17px;
  color: #2b3f36;
}

/* ---------- 主体两栏 ---------- */
.cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 296px;
  gap: 22px;
  align-items: start;
  padding: 28px 0 12px;
}

.sheet {
  padding: 22px 20px;
  min-width: 0;
  background: var(--white);
  border: var(--b);
  border-radius: 22px;
  box-shadow: var(--pop);
}

.prose { overflow-wrap: break-word; }

.prose > section { padding: 4px 0; }

.prose > section + section {
  margin-top: 34px;
  padding-top: 28px;
  border-top: 3px dashed rgba(23, 38, 32, 0.18);
}

.prose h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 2.9vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.prose h3 {
  margin: 22px 0 8px;
  font-size: 20px;
  line-height: 1.35;
}

.prose h2 + hr,
.prose h3 + hr { margin: 0 0 16px; }

.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { margin: 0 0 14px; padding-left: 1.35em; }
.prose li { margin: 0 0 6px; }

.prose a {
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.prose blockquote {
  margin: 0 0 16px;
  padding: 12px 16px;
  border-left: 6px solid var(--sky);
  border-radius: 0 16px 16px 0;
  background: var(--paper2);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  font-size: 16px;
}

.prose th, .prose td {
  padding: 9px 10px;
  border: 2px solid rgba(23, 38, 32, 0.28);
  text-align: left;
}

.prose img { margin: 0 0 16px; border: var(--b); border-radius: 0; }

/* ---------- 侧栏 ---------- */
.side {
  position: sticky;
  top: 132px;
  display: grid;
  gap: 14px;
}

.side-h {
  margin: 0 0 10px;
  font-size: 20px;
  letter-spacing: 0.02em;
}

.side-card hr { margin: 0 0 12px; }

.side-nav ul {
  list-style: none;
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.side-nav a {
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 8px 11px;
  font-size: 16px;
  text-decoration: none;
  border: 3px solid transparent;
  background: var(--paper2);
  box-shadow: inset -2px -2px 6px rgba(23, 38, 32, 0.08);
  transition: transform 0.18s ease-out, background 0.18s ease-out, border-color 0.18s ease-out;
}

.side-nav a:hover {
  background: var(--mint);
  border-color: var(--ink);
  transform: translateX(3px);
}

.top-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 14px;
  font-weight: 600;
  text-decoration: none;
  color: var(--mint);
  background: var(--ink);
  box-shadow: 3px 4px 9px rgba(23, 38, 32, 0.28);
  transition: transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.top-link:hover { transform: translateY(-2px); }

/* ---------- 页脚 ---------- */
.base {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 18px 20px;
  margin-top: 36px;
  padding: 26px 20px 14px;
  border-top: var(--b);
  border-radius: 26px 26px 0 0;
  background: linear-gradient(175deg, var(--paper2), var(--mint));
  box-shadow: inset 0 9px 20px rgba(23, 38, 32, 0.09);
}

.f-mark { grid-column: 1 / -1; }

.f-big {
  margin: 0;
  font-size: clamp(38px, 8.6vw, 82px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.035em;
  color: var(--ink);
  opacity: 0.92;
  overflow-wrap: break-word;
}

.f-h {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.14em;
  opacity: 0.72;
}

.f-list {
  list-style: none;
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
}

.f-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 3px 0;
  font-size: 16px;
  text-decoration: none;
}

.f-list a:hover { text-decoration: underline; text-underline-offset: 4px; }

.f-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 16px;
  font-weight: 600;
  text-decoration: none;
  background: var(--white);
  border: var(--b);
  box-shadow: var(--pop-sm);
  transition: transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.18s ease-out;
}

.f-top:hover { transform: translateY(-2px); background: var(--sky); }

.f-logo {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  margin-top: 8px;
  padding: 4px 0;
  font-weight: 700;
  text-decoration: none;
}

.f-legal {
  grid-column: 1 / -1;
  margin-top: 4px;
  padding-top: 10px;
  border-top: 3px solid rgba(23, 38, 32, 0.32);
}

.f-legal p { margin: 0; font-size: 16px; }

/* ---------- 滚动显现 ---------- */
[data-rev] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease-out, transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-rev].rv-in { opacity: 1; transform: none; }

/* ---------- 断点 ---------- */
@media (min-width: 900px) {
  .mast { position: sticky; top: 0; }
  main section,
  main article section { scroll-margin-top: 150px; }
  .side { top: 150px; }
}

@media (max-width: 880px) {
  .hero { min-height: 0; padding: 18px 0 4px; }
  .hero-body { grid-template-columns: 1fr; gap: 16px; }
  .hero-media { min-height: 178px; }
  .hero-img { max-height: 240px; }
  .cols { grid-template-columns: 1fr; padding-top: 20px; }
  .side { position: static; }
  .sheet { padding: 18px 15px; border-radius: 20px; }
  .base { grid-template-columns: 1fr 1fr; }
  .f-mark { grid-column: 1 / -1; }
  .f-col:last-of-type { grid-column: 1 / -1; }
}

@media (max-width: 700px) {
  .menu ul {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }
  .menu ul::-webkit-scrollbar { display: none; }
  .menu a { white-space: nowrap; }
}

@media (max-width: 460px) {
  .base { grid-template-columns: 1fr; }
  .f-col:last-of-type { grid-column: auto; }
  .brand { font-size: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-rev] { opacity: 1; transform: none; transition: none; }
  .blob { animation: none; }
  * { transition-duration: 0.01ms !important; }
}

button[aria-expanded]{min-width:44px;min-height:44px}