/* ============================================================
   AgentCraft · 开物开发习作集 — 展示站骨架样式
   配色：琥珀 #F59E0B（强调）· 匠墨黑 #0F172A · 宣纸白 #F1F5F9
   ============================================================ */

:root {
  --amber: #F59E0B;
  --amber-soft: #FBBF24;
  --ink: #0F172A;
  --ink-2: #1E293B;
  --slate: #475569;
  --slate-2: #64748B;
  --paper: #F1F5F9;
  --paper-2: #E2E8F0;
  --white: #FFFFFF;
  --line: #E2E8F0;
  --radius: 14px;
  --wrap: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Microsoft YaHei", "Hiragino Sans GB", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

code {
  font-family: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 0.86em;
  color: var(--ink-2);
}

a { color: var(--ink); text-decoration: none; }

/* ===== 顶栏 ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; letter-spacing: 0.2px; }
.brand img { display: block; }
.nav-links { display: flex; gap: 26px; }
.nav-links a { color: var(--slate); font-size: 0.95rem; transition: color 0.15s; }
.nav-links a:hover { color: var(--amber); }

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(900px 420px at 50% -10%, rgba(245, 158, 11, 0.16), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  color: var(--paper);
  text-align: center;
  padding: 96px 24px 108px;
}
.hero-inner { max-width: 760px; margin: 0 auto; }
.hero-mark { margin-bottom: 26px; filter: drop-shadow(0 6px 20px rgba(245, 158, 11, 0.25)); }
.eyebrow {
  text-transform: none;
  letter-spacing: 3px;
  font-size: 0.8rem;
  color: var(--amber-soft);
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4rem);
  margin: 0 0 10px;
  letter-spacing: 0.5px;
  font-weight: 800;
}
.tagline { font-size: clamp(1.1rem, 2.4vw, 1.5rem); color: var(--paper-2); margin: 0 0 26px; font-weight: 500; }
.lead { font-size: 1.08rem; color: #CBD5E1; margin: 0 auto 34px; max-width: 640px; }
.lead strong { color: var(--amber-soft); font-weight: 600; }
.scroll-hint {
  display: inline-block;
  color: var(--paper);
  border: 1px solid rgba(241, 245, 249, 0.35);
  border-radius: 999px;
  padding: 9px 22px;
  font-size: 0.92rem;
  transition: all 0.18s;
}
.scroll-hint:hover { border-color: var(--amber); color: var(--amber-soft); }

/* ===== 通用 section ===== */
.section { padding: 84px 0; }
.section-alt { background: var(--paper); }
.section h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.2rem);
  margin: 0 0 14px;
  font-weight: 800;
  position: relative;
  padding-left: 16px;
}
.section h2::before {
  content: "";
  position: absolute; left: 0; top: 6px; bottom: 6px;
  width: 5px; border-radius: 3px; background: var(--amber);
}
.section-lead { font-size: 1.08rem; color: var(--slate); margin: 0 0 40px; max-width: 720px; }
.note { color: var(--slate-2); font-size: 0.92rem; margin-top: 28px; }

/* ===== 特性网格 ===== */
.feature-grid, .domain-grid, .example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.feature {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.18s, box-shadow 0.18s;
}
.feature:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08); }
.feature h3 { margin: 0 0 8px; font-size: 1.08rem; }
.feature p { margin: 0; color: var(--slate); font-size: 0.96rem; }

/* ===== 工作原理流程 ===== */
.flow {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.flow-step {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
  position: relative;
}
.flow-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 999px;
  background: var(--ink); color: var(--amber-soft);
  font-weight: 700; margin-bottom: 14px;
}
.flow-step h3 { margin: 0 0 8px; font-size: 1.05rem; }
.flow-step p { margin: 0; color: var(--slate); font-size: 0.94rem; }
.flow-arrow { display: none; }  /* 2×2 网格靠编号 1-4 表顺序，箭头不再悬空占位 */

/* ===== 能力域 ===== */
.domain {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--white);
}
.domain.supported { border-top: 3px solid var(--amber); }
.domain.roadmap { background: var(--paper); border-style: dashed; }
.domain h3 { margin: 12px 0 8px; font-size: 1.1rem; }
.domain p { margin: 0; color: var(--slate); font-size: 0.95rem; }
.pill {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.4px;
  padding: 3px 10px;
  border-radius: 999px;
}
.pill-ok { background: rgba(245, 158, 11, 0.14); color: #B45309; }
.pill-soon { background: var(--paper-2); color: var(--slate-2); }

/* ===== 愿景 · 引擎内全栈创作（清晰标注方向） ===== */
.vision {
  margin-top: 44px;
  padding: 30px 28px;
  border: 1.5px dashed var(--amber);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #FEFBF3 0%, var(--white) 100%);
}
.vision-head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.vision-head h3 { margin: 0; font-size: 1.25rem; }
.vision-lead { margin: 0 0 18px; color: var(--slate); font-size: 1rem; max-width: 760px; }
.vision-lead strong { color: #B45309; }
.vision-pills { display: flex; flex-wrap: wrap; gap: 10px; }
.vision-pills span {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 0.92rem;
  color: var(--ink-2);
  font-weight: 500;
}

/* ===== 示例 ===== */
.example {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
}
.example-thumb {
  height: 150px;
  background:
    repeating-linear-gradient(135deg, var(--paper) 0 12px, var(--paper-2) 12px 24px);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.example-thumb::after {
  content: attr(data-pending);
  font-size: 0.82rem;
  color: var(--slate-2);
  background: rgba(255, 255, 255, 0.75);
  padding: 4px 12px;
  border-radius: 999px;
}
.example h3 { margin: 16px 20px 6px; font-size: 1.02rem; }
.example p { margin: 0 20px 20px; color: var(--slate); font-size: 0.92rem; }

/* ===== 时间线 ===== */
.timeline { list-style: none; padding: 0; margin: 0; max-width: 760px; }
.timeline li {
  padding: 16px 0 16px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 1rem;
}
.timeline li:last-child { border-bottom: none; }
.t-tag {
  display: inline-block;
  background: var(--ink);
  color: var(--amber-soft);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
  margin-right: 12px;
  vertical-align: 1px;
}

/* ===== 页脚 ===== */
.footer { background: var(--ink); color: #94A3B8; padding: 48px 0 28px; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-brand { color: var(--paper); font-weight: 700; font-size: 1.1rem; margin: 0 0 4px; }
.footer-sub { margin: 0; font-size: 0.9rem; }
.footer-beian { text-align: right; font-size: 0.86rem; }
.footer-beian p { margin: 0 0 4px; }
.footer-beian a { color: #94A3B8; }
.footer-beian a:hover { color: var(--amber-soft); }
.footer-copy {
  text-align: center;
  font-size: 0.82rem;
  color: #64748B;
  margin: 32px 0 0;
  padding-top: 22px;
  border-top: 1px solid #1E293B;
}

/* ===== 响应式 ===== */
@media (max-width: 680px) {
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 0.86rem; }
  .flow { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
  .footer-beian { text-align: left; }
  .hero { padding: 72px 20px 84px; }
  .section { padding: 60px 0; }
}