/* VC投资人 · The Generalist 式极简编辑风（紫主色 + 橙辅助色） */
:root {
  --bg: #FAF9F6;
  --bg-soft: #F1EFE9;
  --ink: #16150F;
  --ink-soft: #57534A;
  --line: #E3E0D8;
  --accent: #6D28D9;        /* 主色调：紫 */
  --accent-deep: #5B21B6;
  --accent-soft: #F3EDFD;
  --accent2: #F97316;       /* 辅助色调：橙 */
  --accent2-deep: #EA580C;
  --accent2-soft: #FFF1E6;
  --serif: "Source Serif Pro", "Songti SC", "Noto Serif SC", "STSong", serif;
  --sans: Inter, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* Header */
header { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 10; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: .5px; }
.brand em { font-style: normal; color: var(--accent); }
.nav-links { display: flex; gap: 26px; font-size: 14.5px; }
.nav-links a { color: var(--ink-soft); padding: 4px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); border-color: var(--accent); }
.sub-btn { background: var(--ink); color: #fff; padding: 8px 18px; border-radius: 999px; font-size: 14px; border: none; cursor: pointer; }
.sub-btn:hover { background: var(--accent); }

/* Hero */
.hero { padding: 64px 0 48px; border-bottom: 1px solid var(--line); }
.kicker { font-size: 12.5px; letter-spacing: 2px; text-transform: uppercase; color: var(--accent2); font-weight: 600; margin-bottom: 14px; }
.hero h1 { font-family: var(--serif); font-size: 44px; line-height: 1.25; font-weight: 700; max-width: 720px; }
.hero p { margin-top: 16px; color: var(--ink-soft); max-width: 620px; font-size: 17px; }
.hero .sub-form { margin-top: 26px; display: flex; gap: 10px; max-width: 460px; }
.hero input { flex: 1; padding: 11px 16px; border: 1px solid var(--line); border-radius: 8px; font-size: 14.5px; background: #fff; }
.hero input:focus { outline: none; border-color: var(--accent); }

/* Section head */
.section { padding: 44px 0; }
.sec-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 24px; }
.sec-head h2 { font-family: var(--serif); font-size: 26px; }
.sec-head a { font-size: 14px; color: var(--accent); }

/* Article grid */
.grid { display: grid; grid-template-columns: 2fr 1fr; gap: 40px; align-items: start; }
.cards { display: grid; gap: 8px; }
.card { padding: 20px 16px; border-radius: 10px; transition: background .15s; }
.card:hover { background: var(--bg-soft); }
.card .meta { font-size: 12.5px; color: var(--ink-soft); margin-bottom: 6px; }
.card .meta .tag { color: var(--accent2); font-weight: 600; margin-right: 8px; }
.card h3 { font-family: var(--serif); font-size: 20px; line-height: 1.4; }
.card:hover h3 { color: var(--accent); }
.card p { font-size: 14.5px; color: var(--ink-soft); margin-top: 6px; }
.feature { background: #fff; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.feature .art { height: 200px; background: linear-gradient(135deg, #6D28D9 0%, #8B5CF6 45%, #F97316 100%); position: relative; }
.feature .art svg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .35; }
.feature .body { padding: 24px; }
.feature h3 { font-family: var(--serif); font-size: 26px; line-height: 1.35; margin-top: 8px; }
.feature h3 a:hover { color: var(--accent); }
.feature p { color: var(--ink-soft); margin-top: 10px; font-size: 15px; }

/* Sidebar */
.sidebar { display: grid; gap: 24px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.panel h4 { font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 14px; }
.theme-list { display: flex; flex-wrap: wrap; gap: 8px; }
.theme-list a { font-size: 13.5px; padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; }
.theme-list a:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.ad-slot { border: 1.5px dashed #C9C5BA; border-radius: 12px; padding: 18px; text-align: center; color: #A29D91; font-size: 12.5px; background: repeating-linear-gradient(45deg,#FBFAF7,#FBFAF7 12px,#F5F3EC 12px,#F5F3EC 24px); }

/* Briefings timeline */
.timeline { border-left: 2px solid var(--line); margin-left: 6px; padding-left: 26px; display: grid; gap: 28px; }
.tl-item { position: relative; }
.tl-item::before { content: ""; position: absolute; left: -33px; top: 8px; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.tl-item:nth-child(even)::before { background: var(--accent2); }
.tl-item .date { font-size: 12.5px; color: var(--ink-soft); letter-spacing: 1px; }
.tl-item h3 { font-family: var(--serif); font-size: 19px; margin-top: 4px; }
.tl-item h3:hover { color: var(--accent); }
.tl-item p { font-size: 14.5px; color: var(--ink-soft); margin-top: 4px; }

/* Themes grid */
.theme-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.theme-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 24px; transition: transform .15s, box-shadow .15s; }
.theme-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(109,40,217,.12); }
.theme-card .icon { font-size: 26px; }
.theme-card h3 { font-family: var(--serif); font-size: 19px; margin-top: 12px; }
.theme-card:hover h3 { color: var(--accent); }
.theme-card p { font-size: 13.5px; color: var(--ink-soft); margin-top: 6px; }
.theme-card .count { font-size: 12.5px; color: var(--accent2); margin-top: 10px; font-weight: 600; }

/* Deep dives */
.dive { display: flex; gap: 20px; padding: 22px 16px; border-radius: 12px; align-items: baseline; }
.dive:hover { background: var(--bg-soft); }
.dive .no { font-family: var(--serif); font-size: 26px; color: var(--accent); min-width: 44px; font-weight: 700; }
.dive:nth-child(even) .no { color: var(--accent2); }
.dive h3 { font-family: var(--serif); font-size: 21px; }
.dive:hover h3 { color: var(--accent); }
.dive p { font-size: 14px; color: var(--ink-soft); margin-top: 4px; }
.dive .len { font-size: 12.5px; color: var(--ink-soft); margin-top: 6px; }

/* Article page */
.article-wrap { max-width: 760px; margin: 0 auto; padding: 48px 24px; }
.article-wrap .kicker { margin-bottom: 10px; }
.article-wrap h1 { font-family: var(--serif); font-size: 36px; line-height: 1.3; }
.article-meta { display: flex; gap: 16px; font-size: 13.5px; color: var(--ink-soft); margin: 18px 0 8px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.article-body { padding-top: 26px; font-size: 17px; }
.article-body h2 { font-family: var(--serif); font-size: 24px; margin: 34px 0 14px; }
.article-body h2::after { content: ""; display: block; width: 36px; height: 3px; background: var(--accent2); border-radius: 2px; margin-top: 8px; }
.article-body p { margin-bottom: 18px; color: #2A2822; }
.article-body blockquote { border-left: 3px solid var(--accent); padding: 4px 0 4px 18px; color: var(--ink-soft); margin: 22px 0; font-style: italic; }
.article-body .pull { background: var(--accent-soft); border-radius: 10px; padding: 18px 22px; font-family: var(--serif); font-size: 19px; line-height: 1.6; margin: 26px 0; color: var(--accent-deep); }

/* Action bar: tip / share / comment */
.action-bar { margin-top: 40px; border-top: 1px solid var(--line); padding-top: 28px; display: grid; gap: 24px; }
.tip-box { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 24px; text-align: center; }
.tip-box h4 { font-family: var(--serif); font-size: 19px; }
.tip-box h4::before, .tip-box h4::after { content: "❦"; color: var(--accent2); font-size: 14px; margin: 0 8px; }
.tip-box p { font-size: 13.5px; color: var(--ink-soft); margin-top: 4px; }
.qr-row { display: flex; gap: 28px; justify-content: center; margin-top: 18px; }
.qr { text-align: center; }
.qr .img { width: 128px; height: 128px; border: 1px solid var(--line); border-radius: 10px; display: flex; align-items: center; justify-content: center; background: #fff; }
.qr:hover .img { border-color: var(--accent); }
.qr .label { font-size: 12.5px; color: var(--ink-soft); margin-top: 8px; }
.bmc { display: inline-block; margin-top: 18px; font-size: 14px; padding: 9px 20px; border-radius: 999px; background: var(--accent); color: #fff; }
.bmc:hover { background: var(--accent-deep); }
.share-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.share-row span.lbl { font-size: 13.5px; color: var(--ink-soft); margin-right: 4px; }
.share-btn { font-size: 13.5px; padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px; background: #fff; cursor: pointer; }
.share-btn:hover { border-color: var(--accent); color: var(--accent); }
.comment-box { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.comment-box h4 { font-family: var(--serif); font-size: 18px; margin-bottom: 14px; }
.comment { display: flex; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--bg-soft); }
.comment:last-child { border-bottom: none; }
.comment .avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; flex-shrink: 0; }
.comment:nth-child(even) .avatar { background: var(--accent2-soft); color: var(--accent2-deep); }
.comment .who { font-size: 13.5px; font-weight: 600; }
.comment .who .t { font-weight: 400; color: var(--ink-soft); font-size: 12px; margin-left: 8px; }
.comment p { font-size: 14px; color: #2A2822; margin-top: 2px; }
.comment-hint { font-size: 12.5px; color: #A29D91; margin-top: 12px; text-align: center; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 30px; }
.contact-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 30px; text-align: center; }
.contact-card:hover { border-color: var(--accent); }
.contact-card h3 { font-family: var(--serif); font-size: 20px; margin: 10px 0 6px; }
.contact-card p { font-size: 14px; color: var(--ink-soft); }
.contact-card .qr .img { margin: 18px auto 0; }

/* Footer */
footer { border-top: 1px solid var(--line); margin-top: 56px; padding: 32px 0 48px; }
.foot { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--ink-soft); flex-wrap: wrap; gap: 12px; }
.foot a { color: var(--ink-soft); margin-left: 18px; }
.foot a:hover { color: var(--accent); }

@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
  .theme-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .nav-links { display: none; }
}