:root {
  --bg: #fff;
  --text: #111;
  --muted: #666;
  --line: #e7e7e7;
  --soft: #f7f7f7;
  --green: #39d36b;
  --green-dark: #0b1710;
  --green-line: #1c4d2b;
  --green-soft: #102319;
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-header {
  height: 72px;
  display: flex;
  align-items: center;
  gap: 36px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(12px);
}
.brand {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -.03em;
  margin-right: auto;
}
nav { display: flex; gap: 28px; font-size: 14px; color: #555; }
nav a:hover { color: #111; }
.nav-download {
  background: #111;
  color: white;
  border-radius: 9px;
  padding: 9px 15px;
  font-size: 13px;
}

.page { min-height: calc(100vh - 145px); }
.container { width: min(1120px, 90vw); margin: auto; }

.hero {
  min-height: 620px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 80px 0;
}
.eyebrow {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(48px, 8vw, 88px);
  line-height: .98;
  letter-spacing: -.065em;
  margin: 0;
}
.hero p {
  color: var(--muted);
  margin: 26px auto 34px;
  font-size: 16px;
}
.actions { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  padding: 12px 18px;
  border: 1px solid #111;
  border-radius: 10px;
  font-size: 14px;
  transition: .2s ease;
}
.btn.primary { background: #111; color: white; }
.btn:hover { transform: translateY(-2px); }
.btn.secondary { background: white; }

.section { padding: 70px 0; }
.section-title { margin-bottom: 28px; }
.section-title h2 { margin: 0; font-size: 28px; letter-spacing: -.04em; }
.section-title p { margin: 7px 0 0; color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  min-height: 245px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: .2s ease;
}
.card:hover { border-color: #aaa; transform: translateY(-3px); }
.icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border: 1px solid #ddd;
  border-radius: 12px;
  font-size: 20px;
}
.card h3 { margin: 22px 0 5px; font-size: 25px; letter-spacing: -.04em; }
.card p { margin: 0; color: var(--muted); }
.card-link { margin-top: 24px; font-size: 13px; font-weight: 600; }

.simple-page { padding: 100px 0; }
.simple-page h1 { font-size: clamp(42px, 7vw, 72px); line-height: 1; letter-spacing: -.06em; margin: 0 0 18px; }
.lead { color: var(--muted); font-size: 17px; max-width: 620px; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 50px;
}
.feature {
  border: 1px solid var(--line);
  padding: 22px;
  border-radius: 14px;
}
.feature strong { display: block; margin-bottom: 5px; }
.feature span { color: var(--muted); font-size: 13px; }

.sogame {
  --bg: #060907;
  --text: #f3f7f3;
  --muted: #9ba89e;
  --line: #1a241d;
  --green: #39d36b;
  background: var(--bg);
  color: var(--text);
}
.sogame .site-header {
  background: rgba(6,9,7,.94);
  border-color: var(--line);
}
.sogame .brand, .sogame nav a { color: var(--text); }
.sogame nav { color: var(--muted); }
.sogame .nav-download { background: var(--green); color: #041008; }
.sogame .site-footer { border-color: var(--line); }
.sogame .hero { text-align: left; min-height: 600px; }
.sogame .hero-inner { width: 100%; }
.sogame .hero h1 { font-size: clamp(52px, 8vw, 86px); max-width: 800px; }
.sogame .hero p { margin-left: 0; }
.sogame .btn.primary { background: var(--green); color: #061008; border-color: var(--green); }
.sogame .btn.secondary { background: transparent; color: var(--text); border-color: var(--green-line); }
.sogame .card, .sogame .feature { border-color: var(--line); background: #0a0f0c; }
.sogame .card:hover { border-color: #2b5938; }
.sogame .icon { border-color: var(--green-line); }
.sogame .card p, .sogame .lead, .sogame .section-title p { color: var(--muted); }
.sogame .download-panel {
  border: 1px solid var(--green-line);
  border-radius: var(--radius);
  padding: 32px;
  background: linear-gradient(135deg, #0a110c, #08100a);
}
.download-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 28px; }
.download-card {
  padding: 28px;
  border: 1px solid var(--green-line);
  border-radius: 14px;
  background: #0b120d;
}
.download-card h3 { margin: 0 0 5px; }
.download-card p { margin: 0 0 20px; color: var(--muted); font-size: 13px; }

.site-footer {
  min-height: 73px;
  border-top: 1px solid var(--line);
  padding: 22px 5vw;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 12px;
}
.site-footer div { display: flex; gap: 24px; }

@media (max-width: 760px) {
  .site-header { padding: 0 20px; gap: 16px; }
  nav { display: none; }
  .cards, .feature-grid, .download-options { grid-template-columns: 1fr; }
  .hero { min-height: 520px; padding: 60px 0; }
  .simple-page { padding: 70px 0; }
  .site-footer { flex-direction: column; }
  .sogame .hero { text-align: left; }
}

/* ============ 新增:补全部分的样式 ============ */

/* 首页黑白分屏 hero */
.split-hero {
  display: flex;
  min-height: calc(100vh - 72px); /* 整屏高,扣除 72px 顶部导航 */
}
.split-half {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center; /* 标题+卡片成组居中,彼此靠近 */
  gap: 28px;
  padding: 6vh 5vw;
}
.split-half.light {
  /* 白底 + 极淡的斜向细线,增加生气 */
  background-color: #fff;
  background-image: repeating-linear-gradient(115deg, rgba(17,17,17,.05) 0 1px, transparent 1px 140px);
  color: #111;
}
.split-half.dark {
  /* 黑底 + 品牌绿的细线 */
  background-color: #060907;
  background-image: repeating-linear-gradient(115deg, rgba(57,211,107,.08) 0 1px, transparent 1px 160px);
  color: #f3f7f3;
}
/* 标题在各自半区内居中 */
.split-title-wrap {
  display: grid;
  place-items: center;
}
.split-title {
  margin: 0;
  position: relative;
  /* 志莽行书:带行书笔意的同时保持辨识度;失败时回退楷体 */
  font-family: "Zhi Mang Xing", "Ma Shan Zheng", "Noto Serif SC", "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-weight: 400;
  font-size: clamp(56px, 7.5vw, 112px);
  letter-spacing: .08em;
  line-height: 1.15;
  text-align: center;
}
/* 标题下加一笔微微倾斜的手写线条,呼应草书气质 */
.split-title::after {
  content: "";
  display: block;
  width: 62%;
  height: 3px;
  margin: 14px auto 0;
  border-radius: 2px;
  transform: rotate(-1.2deg);
}
.split-half.light .split-title::after { background: rgba(17,17,17,.75); }
.split-half.dark .split-title::after { background: #39d36b; }
.split-card {
  display: block;
  max-width: 460px;
  width: 100%;
  border: 1px solid #e7e7e7;
  border-radius: 18px;
  padding: 28px;
  background: #fff;
  transition: .2s ease;
}
.split-card .icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border: 1px solid #ddd;
  border-radius: 12px;
  font-size: 20px;
}
.split-card h3 { margin: 18px 0 6px; font-size: 24px; letter-spacing: -.03em; }
.split-card p { margin: 0 0 18px; color: #666; }
.split-card .card-link { font-size: 13px; font-weight: 600; }
.split-half.light .split-card:hover {
  border-color: #111;
  transform: translateY(-3px);
}
.split-half.dark .split-card {
  background: #0a0f0c;
  border-color: #1a241d;
  color: #f3f7f3;
}
.split-half.dark .split-card .icon { border-color: #1c4d2b; }
.split-half.dark .split-card p { color: #9ba89e; }
.split-half.dark .split-card:hover {
  border-color: #2b5938;
  transform: translateY(-3px);
}
@media (max-width: 860px) {
  /* 窄屏:上下堆叠,白在上黑在下 */
  .split-hero { flex-direction: column; }
  .split-half { min-height: 60vh; padding: 7vh 6vw; }
}

/* noscript 降级提示 */
.noscript-notice {
  padding: 14px 5vw;
  background: #fff8e6;
  border-bottom: 1px solid #f0e0b0;
  color: #7a5b00;
  font-size: 13px;
  text-align: center;
}

/* 禁用态按钮(如 macOS 即将推出) */
button.btn[disabled], .btn.disabled {
  opacity: .45;
  cursor: not-allowed;
  transform: none;
}
button.btn[disabled]:hover { transform: none; }

/* 变灰的卡片(macOS 占位) */
.download-card.dim { opacity: .6; }

/* 下载页的补充说明与 SHA256 */
.download-note { margin-top: 26px; color: var(--muted); font-size: 13px; }
.download-note a { text-decoration: underline; }
.sha { margin: 16px 0 0; font-size: 12px; color: var(--muted); word-break: break-all; }
.sha code { font-family: ui-monospace, Consolas, monospace; font-size: 11px; }

/* 使用教程步骤列表 */
.steps { list-style: none; padding: 0; margin: 40px 0 0; counter-reset: step; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 18px 0 18px 64px;
  border-bottom: 1px solid var(--line);
}
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 16px;
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-weight: 700;
  font-size: 15px;
}
.sogame .steps li::before { border-color: var(--green-line); color: var(--green); }
.steps li strong { display: block; margin-bottom: 4px; }
.steps li span { color: var(--muted); font-size: 14px; }
.steps a { text-decoration: underline; }
.guide-note { margin-top: 34px; padding: 20px; border: 1px solid var(--line); border-radius: 14px; }
.guide-note p { margin: 6px 0 0; color: var(--muted); font-size: 14px; }
.guide-note a { text-decoration: underline; }

/* 更新日志 */
.changelog { margin-top: 36px; }
.changelog .release { padding: 24px 0; border-bottom: 1px solid var(--line); }
.changelog .release h3 { margin: 0 0 12px; font-size: 19px; }
.changelog .release ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.changelog .release p { margin: 0; color: var(--muted); font-size: 14px; }
.changelog a { text-decoration: underline; }

/* 可点击的 feature 卡片(联系页入口) */
.feature.linkable { transition: .2s ease; }
.feature.linkable:hover { border-color: #aaa; transform: translateY(-2px); }

/* 404 页内的路径显示 */
.simple-page code {
  font-family: ui-monospace, Consolas, monospace;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 13px;
}
.sogame .simple-page code { background: #0a0f0c; }