/* Rollin' Ace 开放平台 —— 单页静态站点样式
   纯静态、无构建、无外部依赖（不引 CDN 字体，保证离线与国内访问速度）。 */

:root {
  --green: #35a05e;
  --green-dark: #2d5a3d;
  --green-deep: #255f3a;
  --green-soft: #e6f3e8;
  --line: #d7e8da;
  --text: #2f5d3f;
  --muted: #6d8b79;
  --code-bg: #f3f8f4;
  --maxw: 968px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  background: #e9f4eb;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: radial-gradient(1200px 600px at 50% -10%, #f4faf5 0%, #e3f0e6 55%) fixed;
  min-height: 100vh;
  touch-action: manipulation;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }

/* ---------- 顶栏 ---------- */
.topnav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.topnav-inner { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; min-height: 56px; }
.brand {
  font-size: 18px; font-weight: 800; letter-spacing: -0.5px;
  color: var(--green-dark); text-decoration: none; white-space: nowrap;
}
.brand-tag {
  display: inline-block; margin-left: 8px; vertical-align: 2px;
  font-size: 10px; font-weight: 700; letter-spacing: 0.6px;
  color: var(--green-dark); background: var(--green-soft);
  border: 1px solid #cfe5d4; border-radius: 6px; padding: 2px 6px;
}
.navlinks { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.navlink {
  color: #3f7a54; text-decoration: none; font-size: 14px;
  padding: 6px 12px; border-radius: 999px; white-space: nowrap;
  transition: background .15s, color .15s;
}
.navlink:hover { background: var(--green-soft); color: var(--green-dark); }
.navlink.cta { background: var(--green); color: #fff; font-weight: 600; }
.navlink.cta:hover { background: #2f8f53; color: #fff; }

/* ---------- 内容区 ---------- */
main { padding: 20px 0 8px; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 8px 24px rgba(45, 90, 61, 0.08);
  padding: 26px 24px;
  margin-bottom: 20px;
}

h1 { font-size: 32px; line-height: 1.25; letter-spacing: -0.5px; color: var(--green-deep); }
h2 { font-size: 21px; line-height: 1.4; color: var(--green-deep); margin-bottom: 14px; }
h3 { font-size: 16px; color: var(--green-deep); }
p { margin-bottom: 10px; }
p:last-child { margin-bottom: 0; }
.muted { color: var(--muted); font-size: 14px; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
  white-space: nowrap;
}

pre.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  background: #f7fbf8;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 12px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  font-size: 13px;
  line-height: 1.65;
  color: #2a4f38;
}
pre.code code { background: none; border: 0; padding: 0; white-space: pre; font-size: inherit; }

.link { color: #2f8f53; text-decoration: none; font-weight: 600; }
.link:hover { text-decoration: underline; }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 44px 24px 38px; }
.hero .lead { max-width: 640px; margin: 14px auto 0; font-size: 15.5px; color: #3d6b50; }
.hero-actions { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-top: 22px; }

.btn {
  display: inline-block; text-decoration: none; font-weight: 600; font-size: 14px;
  padding: 10px 20px; border-radius: 999px;
  transition: background .15s, box-shadow .15s;
}
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 6px 16px rgba(53, 160, 94, .28); }
.btn-primary:hover { background: #2f8f53; }
.btn-ghost { background: #fff; color: var(--green-dark); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--green-soft); }

/* ---------- 能力卡 ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 16px; }
.feat { border: 1px solid var(--line); border-radius: 16px; padding: 18px; background: #fbfefc; }
.feat-off { background: #f7f9f8; }
.feat-off h3 { color: #5c7a68; }
.feat-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.badge {
  font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 999px;
  background: #eef2f0; color: var(--muted); border: 1px solid #e0e8e3; white-space: nowrap;
}
.badge-on { background: var(--green-soft); color: #2f8f53; border-color: #bfe3c9; }
.feat-endpoint { margin: 6px 0 10px; font-size: 14px; }
.feat-list { margin: 0 0 12px; padding-left: 20px; }
.feat-list li { margin: 4px 0; font-size: 14.5px; }
.feat-foot { display: flex; gap: 14px; flex-wrap: wrap; font-size: 14px; }

/* ---------- 步骤 ---------- */
.steps { list-style: none; counter-reset: step; padding: 0; margin: 0; }
.steps > li { position: relative; padding-left: 40px; margin-bottom: 18px; }
.steps > li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 3px;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--green-soft); color: #2f8f53; border: 1px solid #bfe3c9;
  font-size: 13px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.steps > li h3 { margin-bottom: 4px; }
.steps > li > :last-child { margin-bottom: 0; }

/* ---------- 表格 ---------- */
.table-scroll {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  margin: 12px 0; border: 1px solid var(--line); border-radius: 12px;
}
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 14px; background: #fff; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid #eaf3ec; vertical-align: top; }
th { background: #f6fbf7; font-weight: 700; color: var(--green-deep); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }

/* ---------- 申请区 ---------- */
.rules { padding-left: 20px; margin: 8px 0 0; }
.rules li { margin: 4px 0; font-size: 14.5px; }

.apply-box { border: 1px dashed #bfe3c9; background: #f8fdf9; border-radius: 16px; padding: 18px; margin-top: 16px; }
.apply-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.btn-copy {
  background: #fff; border: 1px solid var(--line); color: var(--green-dark);
  cursor: pointer; font: inherit; font-size: 14px; font-weight: 600;
  padding: 10px 18px; border-radius: 999px; transition: background .15s;
}
.btn-copy:hover { background: var(--green-soft); }

/* ---------- 页脚 ---------- */
.foot { padding: 8px 0 40px; text-align: center; color: var(--muted); font-size: 13px; }
.foot p { margin: 4px 0; }

/* ---------- 移动端 ---------- */
@media (max-width: 560px) {
  h1 { font-size: 26px; }
  h2 { font-size: 19px; }
  .card { padding: 20px 16px; border-radius: 16px; }
  .hero { padding: 34px 16px 30px; }
  .hero .lead { font-size: 15px; }
  .navlink { padding: 6px 10px; font-size: 13px; }
  pre.code { font-size: 12px; padding: 12px; }
  .steps > li { padding-left: 36px; }
}

/* ---------- 打印 ---------- */
@media print {
  .topnav, .hero-actions, .apply-actions { display: none; }
  body { background: #fff; }
  .card { box-shadow: none; break-inside: avoid; }
}