/* ============ ArayaQuant 门户 ============ */
:root {
  --bg: #0c0e14;
  --bg-2: #12141d;
  --surface: #171a26;
  --line: rgba(255,255,255,0.08);
  --ink: #f2f3f7;
  --ink-2: #9aa0b4;
  --ink-3: #62687c;
  --accent: #4c8dff;
  --accent-2: #7fb0ff;
  --danger: #ff6b6b;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink); min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  display: flex; flex-direction: column;
}
a { color: inherit; text-decoration: none; }
main { flex: 1; }

/* ---------- 顶栏 ---------- */
.topnav {
  display: flex; align-items: center; gap: 28px; padding: 16px 36px;
  border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20;
  background: rgba(12,14,20,0.85); backdrop-filter: blur(10px);
}
.brand { font-size: 19px; font-weight: 800; letter-spacing: 0.3px; }
.brand span { color: var(--accent); }
.topnav nav { display: flex; gap: 4px; }
.topnav nav a {
  font-size: 13.5px; color: var(--ink-2); padding: 6px 14px; border-radius: 8px;
}
.topnav nav a:hover { color: var(--ink); background: rgba(255,255,255,0.05); }
.topnav nav a.on { color: var(--ink); background: rgba(76,141,255,0.14); }
.who { margin-left: auto; display: flex; align-items: center; gap: 10px; font-size: 12px; }
.who-name { color: var(--accent-2); font-weight: 650; }
.who-exp { color: var(--ink-3); }

/* ---------- 首页 hero ---------- */
.hero { position: relative; padding: 88px 36px 64px; text-align: center; overflow: hidden; }
.hero-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
                    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 90% at 50% 0%, black 30%, transparent 75%);
  opacity: 0.5;
}
.hero-inner { position: relative; }
.kicker { font-size: 11.5px; letter-spacing: 3px; color: var(--ink-3); margin-bottom: 14px; }
.hero h1 { font-size: 52px; margin: 0 0 12px; font-weight: 800; letter-spacing: 0.5px; }
.hero h1 .accent { color: var(--accent); }
.hero .tag { color: var(--ink-2); font-size: 15px; margin: 0; }

/* ---------- 三卡片 ---------- */
.cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px; max-width: 1080px; margin: 8px auto 80px; padding: 0 36px;
}
.card {
  position: relative; background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  min-height: 230px; overflow: hidden; transition: transform .18s, border-color .18s;
}
.card:hover { transform: translateY(-3px); border-color: rgba(76,141,255,0.4); }
.card-body { padding: 28px 26px; height: 100%; display: flex; flex-direction: column; }
.card .icon {
  width: 44px; height: 44px; border-radius: 11px; display: flex; align-items: center; justify-content: center;
  background: rgba(76,141,255,0.13); color: var(--accent-2); font-size: 21px; font-weight: 700; margin-bottom: 16px;
}
.card h2 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--ink-2); font-size: 13px; line-height: 1.65; }
.card .enter { margin-top: auto; padding-top: 18px; color: var(--accent-2); font-size: 13px; font-weight: 600; }
.card-body.blurred { filter: blur(7px); opacity: 0.55; }
.lock-layer {
  position: absolute; inset: 0; display: flex; flex-direction: column; gap: 6px;
  align-items: center; justify-content: center; cursor: pointer;
}
.lock-ico { font-size: 30px; filter: drop-shadow(0 2px 10px rgba(0,0,0,0.5)); }
.lock-txt { font-size: 12.5px; color: var(--ink-2); background: rgba(12,14,20,0.7); padding: 3px 12px; border-radius: 14px; }

/* ---------- 内页 ---------- */
.page { max-width: 1080px; margin: 0 auto; padding: 44px 36px 80px; width: 100%; }
.page-head h1 { margin: 0 0 6px; font-size: 30px; }
.page-head p { margin: 0 0 30px; }

/* 看板方块 */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.tile {
  position: relative; background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px;
  min-height: 170px; display: flex; flex-direction: column; overflow: hidden;
  transition: transform .18s, border-color .18s;
}
.tile:hover { transform: translateY(-3px); border-color: rgba(76,141,255,0.45); }
.tile-glow {
  position: absolute; top: -60px; right: -60px; width: 160px; height: 160px; border-radius: 50%;
  background: radial-gradient(circle, rgba(76,141,255,0.22), transparent 70%);
}
.tile h2 { margin: 0 0 8px; font-size: 17.5px; }
.tile p { margin: 0; color: var(--ink-2); font-size: 12.5px; line-height: 1.6; }
.tile-tags { display: flex; gap: 6px; margin-top: 14px; flex-wrap: wrap; }
.tile-tags span {
  font-size: 10.5px; color: var(--accent-2); background: rgba(76,141,255,0.12);
  padding: 2px 9px; border-radius: 10px;
}
.tile .enter { margin-top: auto; padding-top: 16px; color: var(--accent-2); font-size: 13px; font-weight: 600; }
.ghost-tile { border-style: dashed; opacity: 0.55; justify-content: center; text-align: center; }
.ghost-tile h2 { color: var(--ink-2); }

/* 空状态 */
.empty-state {
  text-align: center; padding: 70px 20px; border: 1px dashed var(--line); border-radius: var(--radius);
}
.empty-state .icon {
  width: 60px; height: 60px; margin: 0 auto 18px; border-radius: 15px; font-size: 28px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  background: rgba(76,141,255,0.12); color: var(--accent-2);
}
.empty-state h2 { margin: 0 0 8px; }
.empty-state .btn { margin-top: 22px; display: inline-block; }

/* ---------- 弹窗 / 按钮 ---------- */
.modal {
  position: fixed; inset: 0; background: rgba(5,6,10,0.72); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal[hidden] { display: none; }
.modal-box {
  width: 380px; max-width: calc(100vw - 40px); background: var(--surface);
  border: 1px solid var(--line); border-radius: 16px; padding: 26px 24px;
  box-shadow: 0 22px 70px rgba(0,0,0,0.55);
}
.modal-box h3 { margin: 0 0 6px; font-size: 17px; }
.modal-box p { margin: 0 0 16px; font-size: 12.5px; }
.modal-box input {
  width: 100%; padding: 11px 13px; border-radius: 9px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink); font-size: 14px; outline: none;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
}
.modal-box input:focus { border-color: var(--accent); }
.err { color: var(--danger); font-size: 12px; min-height: 18px; margin-top: 8px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 10px; }
.btn {
  border: 0; background: var(--accent); color: #fff; font-size: 13.5px; font-weight: 650;
  padding: 9px 20px; border-radius: 9px; cursor: pointer; font-family: inherit;
}
.btn:hover { background: #3d7ef5; }
.btn:disabled { opacity: 0.6; cursor: default; }
.btn.ghost { background: transparent; color: var(--ink-2); border: 1px solid var(--line); }
.btn.ghost:hover { color: var(--ink); }
.btn.tiny { padding: 3px 10px; font-size: 11px; }

/* ---------- 量化模型页 ---------- */
.model {
  background: linear-gradient(165deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: 16px; padding: 26px 28px; margin-bottom: 26px;
}
.model-head { margin-bottom: 4px; }
.model-title {
  margin: 0; font-size: 40px; font-weight: 800; letter-spacing: 0.4px; line-height: 1.1;
  background: linear-gradient(100deg, #5c9dff 0%, #8f83ff 42%, #b06bf0 72%, #d06fe6 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.model-en { font-size: 12.5px; color: var(--ink-3); letter-spacing: 0.6px; margin-top: 6px; text-transform: uppercase; }
.model-tagline { font-size: 15px; color: var(--ink); margin: 16px 0 10px; font-weight: 550; }
.model-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.meta-pill {
  font-size: 11.5px; color: var(--ink-2); background: rgba(255,255,255,0.05);
  border: 1px solid var(--line); border-radius: 20px; padding: 3px 11px;
}
.model-intro p { color: var(--ink-2); font-size: 13.5px; line-height: 1.8; margin: 0 0 10px; }

/* GitHub 按钮 */
.gh-btn {
  margin-left: auto; display: inline-flex; align-items: center; gap: 7px; flex-shrink: 0;
  background: #1c2030; border: 1px solid #30364a; color: var(--ink);
  font-size: 13px; font-weight: 600; padding: 8px 15px; border-radius: 9px; transition: all .16s;
}
.gh-btn:hover { background: #252a3d; border-color: #4c8dff; transform: translateY(-1px); }
.gh-btn svg { color: var(--ink); }

/* 架构图 */
.diagram-card { background: #0e111a; border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; margin: 20px 0; }
.diagram-title { font-size: 12.5px; color: var(--ink-2); font-weight: 650; margin-bottom: 10px; letter-spacing: 0.5px; }
.diagram-wrap { width: 100%; overflow-x: auto; }
.arch-svg { width: 100%; min-width: 640px; height: auto; display: block; }

/* 四子 Agent */
.sub-agents { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; margin: 22px 0; }
.sa { background: rgba(255,255,255,0.03); border: 1px solid var(--line); border-radius: 11px; padding: 14px 15px; }
.sa-k { font-size: 14.5px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.sa-k span { font-size: 12px; font-weight: 500; color: var(--accent-2); margin-left: 4px; }
.sa p { margin: 0; font-size: 12px; color: var(--ink-2); line-height: 1.65; }

.block-title { font-size: 15px; margin: 22px 0 12px; }
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 10px; }
.feat { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; background: rgba(255,255,255,0.02); }
.feat-t { font-size: 13px; font-weight: 650; color: var(--accent-2); margin-bottom: 4px; }
.feat-d { font-size: 12px; color: var(--ink-2); line-height: 1.6; }

.model-foot { display: flex; align-items: center; justify-content: space-between; gap: 28px; row-gap: 14px; margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.model-foot .dim { font-size: 12px; }
.model-foot .gh-btn { flex-shrink: 0; padding: 10px 20px; font-size: 13.5px; }

.dim { color: var(--ink-3); }
footer {
  display: flex; gap: 18px; justify-content: center; padding: 26px;
  border-top: 1px solid var(--line); font-size: 12px; color: var(--ink-3);
}
@media (max-width: 720px) {
  .topnav { padding: 12px 16px; gap: 12px; flex-wrap: wrap; }
  .hero { padding: 54px 16px 40px; }
  .hero h1 { font-size: 38px; }
  .cards, .page { padding-left: 16px; padding-right: 16px; }
}