/* =========================================================================
   上海财哥哥·财哥研学院 — PC 内容站主题
   暗金豪华基调，桌面优先、移动友好；语义化、GEO 友好
   ========================================================================= */

:root {
  --bg:        #0d0a08;
  --bg-2:      #120d09;
  --card:      #1a1310;
  --card-2:    #221913;
  --line:      #322418;
  --primary:   #ffb800;   /* 金 */
  --primary-d: #d99a00;
  --red:       #ff3b30;   /* A股涨 / 强调 */
  --green:     #00c853;   /* A股跌 */
  --text:      #f5ead8;
  --muted:     #b8a890;
  --muted-2:   #8a7a66;
  --radius:    14px;
  --maxw:      1180px;
  --shadow:    0 18px 50px rgba(0,0,0,.45);
  --font:      "PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(255,184,0,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(255,59,48,.06), transparent 55%),
    var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .15s; }
a:hover { color: #ffd34d; }
img { max-width: 100%; height: auto; display: block; }
h1,h2,h3,h4 { line-height: 1.3; color: #fff; font-weight: 700; }
h1 { font-size: 2.4rem; margin: 0 0 .5em; letter-spacing: .5px; }
h2 { font-size: 1.7rem; margin: 1.8em 0 .7em; }
h3 { font-size: 1.25rem; margin: 1.4em 0 .6em; }
p  { margin: 0 0 1.1em; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.muted { color: var(--muted); }
.up   { color: var(--red); }
.down { color: var(--green); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(10px);
  background: rgba(13,10,8,.82);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; color: #fff; font-size: 1.05rem; }
.brand .logo-img {
  width: 38px; height: 38px; border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 6px 18px rgba(255,184,0,.35);
}
.brand small { display:block; font-size:.72rem; color: var(--muted); font-weight:500; letter-spacing:1px; }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  color: var(--muted); padding: 8px 12px; border-radius: 9px; font-size: .94rem; white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active { color: #fff; background: var(--card-2); }
.nav-cta {
  background: linear-gradient(135deg, var(--primary), #ff8a1e);
  color: #1a1310 !important; font-weight: 800; padding: 9px 16px !important;
  box-shadow: 0 8px 20px rgba(255,184,0,.3);
}
.nav-cta:hover { color: #000 !important; filter: brightness(1.06); }
.nav-toggle { display: none; background: none; border: 0; color: #fff; font-size: 1.6rem; cursor: pointer; }

/* ---------- Hero ---------- */
.hero { padding: 78px 0 56px; }
.hero .eyebrow {
  display: inline-block; color: var(--primary); font-weight: 700; letter-spacing: 2px;
  font-size: .82rem; text-transform: uppercase; margin-bottom: 14px;
  border: 1px solid var(--line); padding: 5px 12px; border-radius: 999px; background: var(--card);
}
.hero h1 { max-width: 16em; }
.hero p.lead { font-size: 1.18rem; color: var(--muted); max-width: 40em; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.btn {
  display: inline-block; padding: 13px 26px; border-radius: 12px; font-weight: 800;
  border: 1px solid var(--line); cursor: pointer; font-size: 1rem;
}
.btn-primary { background: linear-gradient(135deg, var(--primary), #ff8a1e); color: #1a1310; border: 0; box-shadow: 0 10px 26px rgba(255,184,0,.32); }
.btn-primary:hover { color: #000; filter: brightness(1.05); }
.btn-ghost { background: var(--card); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); color: #fff; }

/* ---------- 区块 ---------- */
.section { padding: 56px 0; border-top: 1px solid var(--line); }
.section.alt { background: linear-gradient(180deg, var(--bg-2), transparent); }
.section-head { margin-bottom: 30px; }
.section-head .kicker { color: var(--primary); font-weight: 700; letter-spacing: 1.5px; font-size: .8rem; }
.section-head h2 { margin: .25em 0 .35em; }
.section-head p { color: var(--muted); max-width: 46em; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 24px;
  transition: transform .18s, border-color .18s, box-shadow .18s;
}
.card:hover { transform: translateY(-4px); border-color: var(--primary-d); box-shadow: var(--shadow); }
.card .ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(255,184,0,.12); color: var(--primary); font-size: 1.4rem; margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { color: var(--muted); font-size: .96rem; margin: 0 0 14px; }
.card .more { font-weight: 700; font-size: .92rem; }

/* 8 大雷达卡片配色点缀 */
.radar-card .ico { background: rgba(255,59,48,.12); color: var(--red); }

/* ---------- 统计条 ---------- */
.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; text-align: center; }
.stat .num { font-size: 2.1rem; font-weight: 900; color: var(--primary); }
.stat .lab { color: var(--muted); font-size: .92rem; }

/* ---------- 步骤 / 列表 ---------- */
.feat-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.feat-list li {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px;
}
.feat-list .n {
  flex: 0 0 30px; width: 30px; height: 30px; border-radius: 8px; background: var(--primary); color: #1a1310;
  font-weight: 900; display: grid; place-items: center;
}
.feat-list b { color: #fff; }

/* ---------- FAQ ---------- */
.faq details {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 4px 20px; margin-bottom: 12px;
}
.faq summary {
  cursor: pointer; font-weight: 700; color: #fff; padding: 16px 0; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--primary); font-size: 1.5rem; font-weight: 700; }
.faq details[open] summary::after { content: "–"; }
.faq details[open] summary { border-bottom: 1px solid var(--line); }
.faq .ans { color: var(--muted); padding: 14px 0 18px; }

/* ---------- 面包屑 ---------- */
.breadcrumb { color: var(--muted-2); font-size: .85rem; padding: 18px 0 0; }
.breadcrumb a { color: var(--muted); }
.breadcrumb span.sep { margin: 0 8px; opacity: .6; }

/* ---------- 风险提示条 ---------- */
.risk {
  border: 1px solid rgba(255,59,48,.4); background: rgba(255,59,48,.07);
  border-radius: 12px; padding: 14px 18px; color: #ffd9d6; font-size: .92rem;
}
.risk b { color: #fff; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-2); padding: 48px 0 28px; margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.footer-grid h4 { font-size: .98rem; margin: 0 0 14px; color: #fff; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.footer-grid a { color: var(--muted); font-size: .92rem; }
.footer-grid a:hover { color: var(--primary); }
.footer-brand p { color: var(--muted); font-size: .92rem; max-width: 30em; }
.footer-bottom {
  margin-top: 38px; padding-top: 20px; border-top: 1px solid var(--line);
  color: var(--muted-2); font-size: .84rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}
.footer-bottom a { color: var(--muted-2); }

/* ---------- 服务号关注 ---------- */
.footer-follow { margin-top: 36px; }
.follow-card {
  display: flex; align-items: center; gap: 22px;
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 26px;
  max-width: 520px;
}
.follow-card .qrcode { width: 110px; height: 110px; border-radius: 10px; flex: 0 0 110px; }
.follow-card .follow-info h4 { margin: 0 0 8px; color: var(--primary); font-size: 1.05rem; }
.follow-card .follow-info p { color: var(--muted); font-size: .94rem; margin: 0 0 10px; }
.follow-hint { display: inline-block; color: var(--primary); font-weight: 700; font-size: .85rem; letter-spacing: .5px; }

.follow-cta {
  display: flex; align-items: center; gap: 28px;
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 32px;
  max-width: 720px; margin: 0 auto;
}
.follow-cta .qrcode-lg { width: 140px; height: 140px; border-radius: 12px; flex: 0 0 140px; }
.follow-cta-info h2 { margin: 0 0 10px; }
.follow-cta-info p { color: var(--muted); margin: 0 0 14px; }

@media (max-width: 720px) {
  .follow-card, .follow-cta { flex-direction: column; text-align: center; }
  .follow-cta .qrcode-lg { width: 120px; height: 120px; }
}

/* ---------- 文章正文（Pillar/Guide） ---------- */
.article { max-width: 820px; margin: 0 auto; }
.article .meta { color: var(--muted-2); font-size: .9rem; margin-bottom: 8px; }
.article h2 { border-left: 4px solid var(--primary); padding-left: 14px; }
.article blockquote {
  border-left: 4px solid var(--primary); background: var(--card); margin: 1.4em 0;
  padding: 14px 18px; border-radius: 0 12px 12px 0; color: var(--text);
}
.callout {
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid var(--primary-d); border-radius: 14px; padding: 22px 24px; margin: 1.6em 0;
}
.callout h3 { margin-top: 0; color: var(--primary); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .grid-3 { grid-template-columns: repeat(2,1fr); }
  .stats { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  h1 { font-size: 1.9rem; }
  .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; flex-direction: column;
    background: var(--bg-2); border-bottom: 1px solid var(--line); padding: 10px 16px; gap: 2px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 10px; }
  .nav-toggle { display: block; }
  .hero { padding: 48px 0 36px; }
  .grid-2,.grid-3,.grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}