@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --g: #00ff80;
  --b: #0000ff;
  --k: #000000;
  --w: #ffffff;
  --line: #2b2b2b;
  --ink: #e9fff4;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding-bottom: 100px;
  background: var(--k);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
}

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

a {
  color: var(--g);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--g);
  color: var(--k);
  font-weight: 800;
  padding: 12px 18px;
  text-decoration: none;
}

.skip:focus {
  left: 0;
}

/* 顶栏 */
.topline {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 3px solid var(--g);
}

.mark {
  background: var(--g);
  color: var(--k);
  font-weight: 800;
  padding: 5px 10px;
  letter-spacing: -0.01em;
}

.topline-note {
  align-self: center;
  color: var(--g);
  font-size: 13px;
  letter-spacing: 0.16em;
}

/* 首屏 */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  min-height: 45vh;
  border-bottom: 3px solid var(--g);
  overflow: hidden;
}

.hero-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--b);
  border-right: 3px solid var(--g);
  overflow: hidden;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-fallback {
  font-size: clamp(46px, 9vw, 118px);
  font-weight: 800;
  letter-spacing: -0.06em;
  color: var(--w);
  line-height: 1;
}

.hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  gap: 14px;
  padding: clamp(16px, 4vw, 40px);
  text-align: right;
}

.eyebrow {
  margin: 0;
  border: 2px solid var(--g);
  color: var(--g);
  font-size: 13px;
  letter-spacing: 0.2em;
  padding: 4px 9px;
}

h1 {
  margin: 0;
  color: var(--w);
  font-size: clamp(28px, 5.2vw, 54px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.hero-lead {
  margin: 0;
  max-width: 36ch;
  color: #cdf6e2;
  font-size: 16px;
}

.hero-jump {
  display: inline-block;
  min-height: 44px;
  padding: 12px 18px;
  background: var(--g);
  color: var(--k);
  border: 3px solid var(--g);
  font-weight: 800;
  text-decoration: none;
}

.hero-jump:hover {
  background: var(--k);
  color: var(--g);
}

.hero-word {
  position: absolute;
  right: -0.05em;
  bottom: -0.16em;
  z-index: 1;
  font-size: clamp(76px, 17vw, 210px);
  font-weight: 800;
  line-height: 0.8;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(0, 255, 128, 0.35);
  pointer-events: none;
}

/* 主体骨架 */
main {
  display: grid;
  grid-template-columns: minmax(0, 250px) minmax(0, 1fr);
  max-width: 1180px;
  margin: 0 auto;
}

.rail {
  position: sticky;
  top: 0;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px 16px;
  border-right: 3px solid var(--line);
}

.rail-card {
  border: 3px solid var(--g);
  border-bottom-width: 8px;
  border-radius: 4px;
  background: #080808;
  padding: 12px;
}

.rail-label {
  margin: 0 0 6px;
  color: var(--g);
  font-size: 13px;
  letter-spacing: 0.18em;
}

.rail-card p:last-child {
  margin: 0;
  font-size: 15px;
  color: #d6ffe9;
}

.rail-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rail-index a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  min-height: 40px;
  padding: 9px 4px;
  color: var(--ink);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px dashed #333;
}

.rail-index .num {
  color: var(--g);
  font-weight: 800;
  font-size: 13px;
}

.rail-index a:hover {
  background: var(--g);
  color: var(--k);
}

.rail-index a:hover .num {
  color: var(--k);
}

/* 正文 */
.doc {
  padding: clamp(18px, 3vw, 34px);
  min-width: 0;
}

.doc-head {
  border-bottom: 3px solid var(--g);
  padding-bottom: 14px;
  margin-bottom: 6px;
}

h2 {
  margin: 0 0 10px;
  padding-left: 12px;
  border-left: 10px solid var(--g);
  color: var(--w);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
}

p.subtitle {
  margin: 0 0 4px;
  padding-left: 22px;
  color: var(--g);
  font-size: 16px;
}

.doc h3 {
  margin: 22px 0 10px;
  color: var(--w);
  font-size: 20px;
  font-weight: 800;
  border-bottom: 2px solid var(--line);
  padding-bottom: 6px;
}

.doc > article {
  padding: 26px 0 30px;
  border-top: 3px solid var(--line);
  scroll-margin-top: 18px;
}

.doc > article:first-of-type {
  border-top: 0;
  padding-top: 18px;
}

.doc p {
  margin: 0 0 14px;
  max-width: 68ch;
}

.doc ul,
.doc ol {
  margin: 0 0 16px;
  padding-left: 1.35em;
}

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

.doc a {
  color: var(--g);
  text-decoration: none;
  border-bottom: 2px solid var(--g);
}

.doc a:hover {
  background: var(--g);
  color: var(--k);
}

.doc strong {
  color: var(--w);
  background: linear-gradient(transparent 62%, rgba(0, 255, 128, 0.35) 0);
}

.doc blockquote {
  margin: 0 0 16px;
  padding: 8px 0 8px 14px;
  border-left: 10px solid var(--b);
  color: #d8ffe9;
}

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

.doc table {
  width: 100%;
  margin: 0 0 18px;
  border-collapse: collapse;
  font-size: 15px;
}

.doc th {
  background: var(--b);
  color: var(--w);
  text-align: left;
  padding: 10px;
  border: 2px solid var(--w);
  font-weight: 800;
}

.doc td {
  padding: 10px;
  border: 2px solid #333;
  vertical-align: top;
}

.doc figure {
  margin: 0 0 18px;
}

.doc figcaption {
  font-size: 14px;
  color: #9fc9b6;
  padding-top: 6px;
}

.card {
  border: 3px solid var(--g);
  border-bottom-width: 8px;
  border-radius: 4px;
  background: #080808;
  padding: 14px;
}

/* 页脚 */
.foot {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 3px solid var(--g);
  background: #050505;
  margin-top: 24px;
}

.foot article {
  padding: 22px 18px;
  border-right: 3px solid var(--line);
  min-width: 0;
}

.foot article:first-child {
  background: var(--b);
}

.foot-mark {
  margin: 0 0 8px;
  color: var(--w);
  font-size: 19px;
  font-weight: 800;
}

.foot article p {
  margin: 0 0 10px;
  font-size: 15px;
  color: #bcd9cb;
}

.foot article:first-child p {
  color: #dfe4ff;
}

.foot-h {
  margin: 0 0 10px !important;
  color: var(--g) !important;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.14em;
}

.foot nav dl {
  margin: 0;
}

.foot nav dt {
  margin-bottom: 6px;
  color: var(--g);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.foot nav dd {
  margin: 0;
}

.foot nav a {
  display: block;
  min-height: 40px;
  padding: 8px 0;
  color: var(--ink);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px dashed #333;
}

.foot nav a:hover {
  background: var(--g);
  color: var(--k);
}

.subform {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.subform input {
  flex: 1 1 120px;
  min-width: 0;
  min-height: 44px;
  padding: 10px;
  background: var(--k);
  color: var(--w);
  border: 3px solid var(--g);
  border-radius: 4px;
  font: inherit;
  font-size: 15px;
}

.subform input::placeholder {
  color: #7fb99e;
}

.subform button {
  min-height: 44px;
  padding: 10px 18px;
  background: var(--g);
  color: var(--k);
  border: 3px solid var(--g);
  border-radius: 4px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.subform button:hover {
  background: var(--k);
  color: var(--g);
}

.copy {
  grid-column: 1 / -1;
  margin: 0;
  padding: 12px 18px;
  border-top: 3px solid var(--line);
  color: #94b7a7;
  font-size: 14px;
}

/* 底部固定导航 */
.dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
  padding: 8px 10px;
  background: var(--k);
  border-top: 3px solid var(--g);
}

.dock-brand {
  flex: 0 0 auto;
  padding: 8px 12px;
  background: var(--g);
  color: var(--k);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.dock-list {
  display: flex;
  flex: 1 1 auto;
  gap: 6px;
  margin: 0;
  padding: 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.dock-list::-webkit-scrollbar {
  display: none;
}

.dock-list a {
  display: inline-block;
  min-height: 44px;
  padding: 11px 14px;
  border: 2px solid var(--g);
  border-radius: 999px;
  color: var(--g);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.1;
  text-decoration: none;
  white-space: nowrap;
}

.dock-list a:hover {
  background: var(--g);
  color: var(--k);
}

/* 滚动显现 */
.rv {
  opacity: 0;
  transform: translateY(14px);
}

.rv.on {
  opacity: 1;
  transform: none;
  transition: opacity 0.2s steps(3), transform 0.2s steps(3);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .rv {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (max-width: 900px) {
  main {
    grid-template-columns: 1fr;
  }
  .rail {
    position: static;
    border-right: 0;
    border-bottom: 3px solid var(--line);
    gap: 14px;
    padding: 18px 16px;
  }
  .rail-index ol {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 12px;
  }
  .foot {
    grid-template-columns: 1fr 1fr;
  }
  .foot article:nth-child(2n) {
    border-right: 0;
  }
  .foot article {
    border-bottom: 3px solid var(--line);
  }
}

@media (max-width: 620px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .hero-media {
    height: 92px;
    border-right: 0;
    border-bottom: 3px solid var(--g);
  }
  .hero-fallback {
    font-size: 44px;
  }
  .hero-copy {
    padding: 16px;
  }
  .hero-word {
    font-size: clamp(52px, 19vw, 88px);
    bottom: -0.1em;
  }
  .foot {
    grid-template-columns: 1fr;
  }
  .foot article {
    border-right: 0;
  }
  .rail-index ol {
    grid-template-columns: 1fr;
  }
  .doc {
    padding: 16px;
  }
  .hero-lead {
    max-width: none;
  }
}

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