:root {
  --ink: #1E293B;
  --sub: #64748B;
  --line: #E2E8F0;
  --blue: #2563EB;
  --cyan: #22D3EE;
  --bg: #F8FAFC;
  --grad: linear-gradient(90deg, #0F172A, #2563EB, #22D3EE);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif; color: var(--ink); background: var(--bg); }
a { text-decoration: none; color: inherit; }

/* 导航 */
.nav { display: flex; align-items: center; gap: 4px; padding: 14px 4vw; background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; flex-wrap: wrap; }
.nav .logo img { height: 42px; display: block; }
.nav .links { display: flex; gap: 2px; flex-wrap: wrap; margin-left: auto; }
.nav .links a { padding: 8px 13px; border-radius: 8px; font-size: 15px; color: var(--sub); }
.nav .links a:hover { background: #EFF6FF; color: var(--blue); }
.nav .links a.hot { color: var(--blue); font-weight: bold; }
/* 导航账号区 */
.nav .nav-acc { display: flex; align-items: center; gap: 10px; margin-left: 14px; }
.nav .acc-btn { padding: 8px 18px; border-radius: 8px; background: var(--grad); color: #fff; font-size: 14px; font-weight: bold; white-space: nowrap; }
.nav .acc-btn:hover { opacity: .9; }
.nav .acc-name { font-size: 14px; font-weight: bold; color: var(--ink); white-space: nowrap; }
.nav .acc-name:hover { color: var(--blue); }
.nav .acc-pts { font-size: 12.5px; color: var(--sub); background: #F1F5F9; padding: 4px 10px; border-radius: 20px; white-space: nowrap; }
.nav .acc-out { font-size: 13px; color: var(--sub); cursor: pointer; white-space: nowrap; }
.nav .acc-out:hover { color: var(--blue); }

/* 登录 / 注册页 */
.auth-wrap { min-height: 76vh; display: flex; align-items: center; justify-content: center; padding: 40px 16px; }
.auth-card { width: 100%; max-width: 430px; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 34px 30px 26px; box-shadow: 0 12px 40px rgba(15,23,42,.08); }
.auth-logo { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-bottom: 22px; }
.auth-logo img { height: 46px; }
.auth-logo span { font-size: 13px; color: var(--sub); }
.auth-tabs { display: flex; background: #F1F5F9; border-radius: 10px; padding: 4px; margin-bottom: 10px; }
.auth-tabs a { flex: 1; text-align: center; padding: 9px 0; border-radius: 8px; font-size: 15px; color: var(--sub); cursor: pointer; }
.auth-tabs a.on { background: #fff; color: var(--blue); font-weight: bold; box-shadow: 0 2px 8px rgba(15,23,42,.08); }
.auth-card form label { display: block; font-size: 13.5px; color: var(--sub); margin: 14px 0 6px; }
.auth-card form input { width: 100%; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px; font-size: 15px; outline: none; font-family: inherit; }
.auth-card form input:focus { border-color: var(--blue); }
.auth-submit { width: 100%; margin-top: 22px; padding: 13px 0; border: none; border-radius: 10px; background: var(--grad); color: #fff; font-size: 16px; font-weight: bold; cursor: pointer; font-family: inherit; }
.auth-submit:disabled { opacity: .6; cursor: default; }
.auth-msg { min-height: 18px; margin-top: 12px; font-size: 13.5px; color: #DC2626; text-align: center; }
.auth-msg.ok { color: #15803D; }
.auth-wechat { margin-top: 16px; text-align: center; }
.auth-wechat button { width: 100%; padding: 12px 0; border: 1.5px solid var(--line); border-radius: 10px; background: #fff; color: #94A3B8; font-size: 14.5px; cursor: not-allowed; font-family: inherit; }
.auth-wechat p { font-size: 12.5px; color: #94A3B8; margin-top: 8px; }
.auth-foot { margin-top: 18px; text-align: center; font-size: 13px; color: var(--sub); }

/* Hero */
.hero { padding: 72px 4vw 60px; text-align: center; background: radial-gradient(1200px 400px at 50% -80px, #DBEAFE, transparent), var(--bg); }
.hero h1 { font-size: 40px; line-height: 1.3; }
.hero h1 .g { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.sub { margin-top: 16px; font-size: 18px; color: var(--sub); }
.hero .cta { margin-top: 32px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 30px; border-radius: 10px; font-size: 16px; font-weight: bold; }
.btn.primary { background: var(--grad); color: #fff; }
.btn.ghost { border: 1.5px solid var(--blue); color: var(--blue); background: #fff; }

/* 区块 */
section { padding: 56px 4vw; max-width: 1200px; margin: 0 auto; }
h2.sec { font-size: 26px; text-align: center; margin-bottom: 8px; }
p.secdesc { text-align: center; color: var(--sub); margin-bottom: 32px; }

/* 赛道卡片 */
.tracks { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.track { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 26px 22px; transition: .15s; position: relative; }
.track:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(37,99,235,.10); border-color: #BFDBFE; }
.track .icon { font-size: 34px; }
.track h3 { margin: 12px 0 8px; font-size: 19px; }
.track p { font-size: 14px; color: var(--sub); line-height: 1.7; }
.track .go { display: inline-block; margin-top: 14px; font-size: 14px; font-weight: bold; color: var(--blue); }
.track.soon { opacity: .78; }
.track .tag { position: absolute; top: 14px; right: 14px; font-size: 12px; padding: 3px 9px; border-radius: 20px; background: #F1F5F9; color: var(--sub); }
.track .tag.live { background: #DCFCE7; color: #15803D; }

/* OPC 三步 */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.step { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 26px; }
.step .no { font-size: 15px; font-weight: bold; color: var(--blue); }
.step h3 { margin: 10px 0 8px; font-size: 18px; }
.step p { font-size: 14px; color: var(--sub); line-height: 1.8; }

/* 资讯 */
.news { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.news .item { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.news .item .date { font-size: 13px; color: #94A3B8; }
.news .item h4 { margin: 8px 0; font-size: 16px; line-height: 1.6; }
.news .item p { font-size: 14px; color: var(--sub); line-height: 1.7; }

/* 页脚 */
footer { border-top: 1px solid var(--line); padding: 34px 4vw; text-align: center; color: #94A3B8; font-size: 13px; background: #fff; }
footer .flinks { margin-bottom: 12px; }
footer .flinks a { margin: 0 10px; color: var(--sub); }
footer .icp { margin-top: 10px; font-size: 12px; }
footer .icp a { color: #94A3B8; text-decoration: none; }
footer .icp a:hover { color: var(--sub); text-decoration: underline; }

/* coming 页 */
.coming { min-height: 78vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 40px 4vw; }
.coming img { height: 52px; margin-bottom: 34px; }
.coming h1 { font-size: 32px; }
.coming .bar { width: 240px; height: 6px; border-radius: 6px; background: var(--grad); margin: 26px auto; opacity: .85; }
.coming p { color: var(--sub); max-width: 560px; line-height: 1.9; }
.coming .back { margin-top: 30px; }

/* ---- 创业资讯 ---- */
.newslist { max-width: 860px; margin: 0 auto; padding: 40px 20px 80px; }
.newslist .nitem { border: 1px solid var(--line); border-radius: 14px; padding: 22px 26px; margin-bottom: 18px; background: #fff; transition: box-shadow .15s; }
.newslist .nitem:hover { box-shadow: 0 6px 24px rgba(15,23,42,.08); }
.newslist .nmeta { font-size: 13px; color: var(--sub); margin-bottom: 6px; }
.newslist .nitem h3 { font-size: 19px; margin: 0 0 8px; }
.newslist .nitem h3 a { color: var(--ink); text-decoration: none; }
.newslist .nitem h3 a:hover { color: var(--blue); }
.newslist .nitem p { margin: 0; color: var(--sub); font-size: 14.5px; line-height: 1.7; }

.article { max-width: 760px; margin: 0 auto; padding: 40px 20px 80px; }
.article h1 { font-size: 28px; line-height: 1.35; margin: 18px 0 8px; }
.article .ameta { color: var(--sub); font-size: 13.5px; border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 26px; }
.article .prose h2 { font-size: 20px; margin: 30px 0 12px; }
.article .prose p { line-height: 1.9; font-size: 15.5px; color: #1e293b; margin: 12px 0; }
.article .prose li { line-height: 1.9; font-size: 15.5px; color: #1e293b; margin: 6px 0; }
.article .prose .card { background: #F0F9FF; border-left: 4px solid var(--blue); border-radius: 8px; padding: 14px 18px; margin: 18px 0; font-size: 14.5px; }
.article .prose strong { color: var(--blue); }