@import url('https://fonts.googleapis.com/css2?family=Lexend:wght@300;400;500;600;700&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

:root {
  --mint: #99ffcc;
  --lime: #00ff41;
  --ink: #001e3c;
  --deep: #00121f;
  --snow: #eafff6;
  --dim: #9dcfbd;
  --line: rgba(153, 255, 204, 0.18);
  --glass: rgba(153, 255, 204, 0.06);
  --font-body: "Source Sans 3", "Lexend", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-head: "Lexend", "Source Sans 3", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  background: #00101c;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  color: var(--snow);
  background: linear-gradient(180deg, #001e3c 0%, #00162b 55%, #00101c 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: -22%;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(38% 30% at 20% 14%, rgba(153, 255, 204, 0.30), transparent 70%),
    radial-gradient(40% 34% at 84% 6%, rgba(0, 255, 65, 0.16), transparent 72%),
    radial-gradient(48% 42% at 62% 96%, rgba(0, 110, 170, 0.38), transparent 70%);
  filter: blur(46px);
  animation: breathe 15s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.68; }
  50% { transform: scale(1.14); opacity: 0.95; }
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 0 0 0.6em;
}

p { margin: 0 0 1.1em; }

a {
  color: var(--mint);
  text-decoration: none;
  transition: color 0.22s ease, border-color 0.22s ease;
}

a:hover { color: var(--lime); }

img { max-width: 100%; }

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

/* ---------- 顶栏 ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 20px;
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  min-height: 44px;
  padding: 2px 4px;
  color: var(--snow);
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.mark:hover { color: var(--mint); }

.mark-logo {
  width: 32px;
  height: 32px;
  display: block;
  flex: 0 0 auto;
  object-fit: contain;
}

.mark-txt {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.menu-wrap {
  position: relative;
  margin-left: auto;
}

.menu-pill {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--mint);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(0, 30, 60, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.22s ease, color 0.22s ease;
}

.menu-pill::-webkit-details-marker { display: none; }

.menu-pill:hover { color: var(--lime); border-color: rgba(0, 255, 65, 0.5); }

.menu-wrap[open] .menu-pill {
  color: #00281c;
  background: linear-gradient(120deg, var(--mint), var(--lime));
  border-color: transparent;
}

.menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  z-index: 60;
  min-width: 240px;
  margin: 0;
  padding: 10px;
  list-style: none;
  background: rgba(0, 25, 46, 0.96);
  border: 1px solid var(--line);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 26px 60px -30px rgba(0, 255, 65, 0.5);
}

.menu li { margin: 0; }

.menu a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--snow);
  border-left: 2px solid transparent;
}

.menu a:hover {
  color: var(--lime);
  border-left-color: var(--lime);
  background: rgba(153, 255, 204, 0.07);
}

.open-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  max-width: 42vw;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #00281c;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--mint), var(--lime));
  box-shadow: 0 12px 34px -16px rgba(0, 255, 65, 0.9);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.open-btn:hover {
  color: #00281c;
  transform: translateY(-2px);
  box-shadow: 0 18px 40px -16px rgba(0, 255, 65, 1);
}

/* ---------- 粘性锚点条 ---------- */

.rail {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(0, 22, 42, 0.78);
  border-top: 1px solid rgba(153, 255, 204, 0.1);
  border-bottom: 1px solid rgba(153, 255, 204, 0.14);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.rail-track {
  display: flex;
  gap: 8px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 8px 20px;
  overflow-x: auto;
  scrollbar-width: none;
}

.rail-track::-webkit-scrollbar { display: none; }

.rail-track a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--dim);
  border: 1px solid transparent;
  border-radius: 999px;
  white-space: nowrap;
  transition: color 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.rail-track a:hover {
  color: var(--lime);
  border-color: rgba(0, 255, 65, 0.45);
  background: rgba(0, 255, 65, 0.08);
}

/* ---------- 主栅格 ---------- */

.stage { padding: 26px 0 10px; }

.wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 296px;
  gap: 26px;
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

.col-main { min-width: 0; }

/* ---------- 玻璃正文片 ---------- */

.sheet {
  counter-reset: sec;
  padding: 0 30px 40px;
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 40px 90px -60px rgba(0, 255, 65, 0.6);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: center;
  min-height: 45vh;
  padding: 28px 0 34px;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--mint), var(--lime) 58%, transparent);
  clip-path: polygon(0 0, 100% 52%, 100% 100%, 0 48%);
}

.hero-copy { text-align: center; }

.hero h1 {
  font-size: clamp(2rem, 4.4vw, 3.1rem);
  letter-spacing: -0.025em;
  background: linear-gradient(100deg, #ffffff 12%, var(--mint) 62%, var(--lime));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.45em;
}

.lead {
  color: var(--dim);
  font-size: 17px;
  line-height: 1.75;
  max-width: 46ch;
  margin: 0 auto;
}

.hero-figure { margin: 0; }

.hero-media {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  clip-path: polygon(0 9%, 94% 0, 100% 87%, 7% 100%);
  filter: saturate(1.1);
}

/* ---------- 正文区块 ---------- */

.sheet > article {
  counter-increment: sec;
  padding: 38px 0;
  border-top: 1px solid rgba(153, 255, 204, 0.14);
  scroll-margin-top: 130px;
}

.sheet > article > h2::before {
  content: counter(sec, decimal-leading-zero);
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--lime);
}

.sheet h2 {
  font-size: clamp(1.42rem, 2.6vw, 1.92rem);
  color: #ffffff;
}

.sheet h3 {
  font-size: 1.16rem;
  color: var(--mint);
  margin-top: 1.5em;
}

.sheet p { max-width: 68ch; }

.sheet ul,
.sheet ol { padding-left: 1.25em; margin: 0 0 1.2em; max-width: 68ch; }

.sheet li { margin: 0.4em 0; }

.sheet li::marker { color: var(--lime); }

.sheet strong { color: var(--mint); }

.sheet img {
  display: block;
  margin: 24px 0;
  border: 1px solid var(--line);
}

.sheet blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 3px solid var(--lime);
  background: rgba(0, 255, 65, 0.07);
  color: var(--dim);
}

.sheet blockquote p:last-child { margin-bottom: 0; }

.sheet table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 16px;
}

.sheet th,
.sheet td {
  padding: 10px 12px;
  border: 1px solid rgba(153, 255, 204, 0.22);
  text-align: left;
}

.sheet th { background: rgba(153, 255, 204, 0.1); color: var(--mint); }

.sheet code {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.94em;
  padding: 1px 5px;
  background: rgba(0, 255, 65, 0.12);
  color: var(--lime);
}

.sheet hr {
  border: 0;
  height: 1px;
  margin: 30px 0;
  background: linear-gradient(90deg, var(--mint), transparent);
}

/* ---------- 右侧栏 ---------- */

.col-side {
  position: sticky;
  top: 78px;
}

.side-card {
  padding: 22px;
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.side-title {
  font-size: 14px;
  letter-spacing: 0.3em;
  font-weight: 500;
  color: var(--lime);
  margin-bottom: 12px;
}

.subtitle {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--dim);
}

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

.side-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 2px;
  font-size: 15px;
  color: var(--snow);
  border-bottom: 1px solid rgba(153, 255, 204, 0.1);
}

.side-list li:last-child a { border-bottom: 0; }

.side-list a:hover { color: var(--lime); }

/* ---------- 页脚 ---------- */

.foot {
  margin-top: 62px;
  border-top: 1px solid var(--line);
  background: rgba(0, 16, 28, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.foot article { display: block; }

.foot-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 52px 20px 34px;
}

.foot-cta h2 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  background: linear-gradient(100deg, var(--mint), var(--lime));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn-big {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 600;
  color: #00281c;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--mint), var(--lime));
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.btn-big:hover {
  color: #00281c;
  transform: translateY(-2px);
  box-shadow: 0 18px 40px -18px rgba(0, 255, 65, 1);
}

.foot-cols {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 26px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 30px 20px 36px;
  border-top: 1px solid rgba(153, 255, 204, 0.12);
}

.foot-col { min-width: 0; }

.foot-col h3 {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--mint);
}

.foot-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--dim);
}

.foot-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.foot-col a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 15px;
  color: var(--snow);
}

.foot-col a:hover { color: var(--lime); }

.foot-base {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 20px 34px;
  border-top: 1px solid rgba(153, 255, 204, 0.12);
  text-align: center;
  font-size: 14px;
  color: var(--dim);
}

.foot-base p { margin: 0; }

/* ---------- 断点 ---------- */

@media (max-width: 900px) {
  .wrap { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .col-side { position: static; order: 2; }
  .hero { grid-template-columns: minmax(0, 1fr); min-height: 0; gap: 20px; }
  .hero-copy { text-align: left; }
  .lead { margin: 0; max-width: 60ch; }
  .hero-figure { max-width: 420px; }
  .foot-cols { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .topbar { padding: 12px 14px; gap: 10px; }
  .mark { font-size: 15px; }
  .mark-logo { width: 28px; height: 28px; }
  .menu-pill { padding: 10px 14px; font-size: 14px; }
  .open-btn { padding: 10px 14px; font-size: 14px; }
  .rail-track { padding: 8px 14px; }
  .wrap { padding: 0 14px; }
  .stage { padding: 18px 0 6px; }
  .sheet { padding: 0 16px 30px; }
  .hero { padding: 20px 0 26px; }
  .hero h1 { font-size: clamp(1.72rem, 8.4vw, 2.3rem); }
  .lead { font-size: 16px; }
  .sheet > article { padding: 30px 0; scroll-margin-top: 116px; }
  .sheet h2 { font-size: 1.34rem; }
  .side-card { padding: 18px; }
  .foot-cta { padding: 38px 14px 26px; }
  .foot-cols { grid-template-columns: minmax(0, 1fr); padding: 24px 14px 28px; gap: 18px; }
  .foot-base { padding: 14px 14px 28px; }
  .menu { right: -1px; left: auto; min-width: 62vw; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body::before { animation: none; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

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