:root{
  --bg:#f7f8fa; --card:#ffffff; --text:#1f2937; --muted:#6b7280;
  --accent:#2563eb; --accent-dark:#1e40af; --line:#e5e7eb;
  --radius:14px; --shadow:0 6px 24px rgba(15,23,42,.07);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg); color:var(--text); line-height:1.75; font-size:16px;
}
.wrap{max-width:1020px;margin:0 auto;padding:0 20px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-weight:800;font-size:20px;color:var(--text);letter-spacing:1px}
.brand:hover{text-decoration:none}
.links{display:flex;gap:26px}
.links a{color:var(--text);font-size:15px}
.links a:hover{color:var(--accent);text-decoration:none}
.menu-btn{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:var(--text)}

/* Hero */
.hero{background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 60%,#1d4ed8 100%);color:#fff;padding:84px 0 72px}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:14px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.dot{width:8px;height:8px;border-radius:50%;background:#4ade80;box-shadow:0 0 8px #4ade80}
.hero h1{font-size:clamp(34px,6vw,52px);line-height:1.25;font-weight:800;margin-bottom:14px}
.hero h1 .accent{color:#93c5fd}
.hero-sub{font-size:18px;color:#dbeafe;max-width:640px}
.hero-goal{margin-top:18px;font-size:16px;color:#e0e7ff}
.hero-goal strong{color:#fff;background:rgba(255,255,255,.14);padding:2px 10px;border-radius:6px;font-weight:600}
.hero-btns{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 28px;border-radius:10px;font-weight:600;font-size:16px;transition:transform .15s,box-shadow .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn.primary{background:#fff;color:var(--accent-dark);box-shadow:0 8px 20px rgba(0,0,0,.18)}
.btn.ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff}

/* 通用区块 */
.section{padding:64px 0}
.section.alt{background:#fff}
.section h2{font-size:26px;margin-bottom:28px;position:relative;padding-left:14px}
.section h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--accent)}
.section h2.mt{margin-top:44px}
.muted{color:var(--muted)}
.center{text-align:center}

/* 关于 */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:start}
.about-text p{margin-bottom:14px}
.fact-list{list-style:none;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.fact-list li{display:flex;padding:12px 18px;border-bottom:1px solid var(--line);font-size:15px}
.fact-list li:last-child{border-bottom:none}
.fact-list li span{width:88px;flex-shrink:0;color:var(--muted)}

/* 卡片 */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s}
.section.alt .card{background:var(--bg)}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(15,23,42,.12)}
.card h3{font-size:18px;margin-bottom:14px}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tags span{font-size:13px;background:#eef2ff;color:#3730a3;padding:4px 12px;border-radius:999px}
.section.alt .tags span{background:#e0e7ff}

/* 项目 */
.project .proj-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.project .proj-top h3{margin-bottom:0}
.badge{font-size:12px;color:#047857;background:#d1fae5;padding:3px 10px;border-radius:999px;white-space:nowrap}
.proj-desc{font-size:15px;color:#374151;margin-bottom:14px}
.proj-link{margin-top:14px;font-weight:600}
.card.featured{border:1.5px solid var(--accent)}

/* 时间线 */
.timeline{list-style:none;position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:var(--line)}
.timeline li{position:relative;margin-bottom:30px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow)}
.section.alt .timeline li{background:var(--bg)}
.timeline li::before{content:"";position:absolute;left:-24px;top:28px;width:12px;height:12px;border-radius:50%;background:var(--accent);border:3px solid #dbeafe}
.timeline .time{font-size:13px;color:var(--muted);margin-bottom:4px}
.timeline h3{font-size:17px;margin-bottom:6px}

.bullets{list-style:none;margin-top:8px}
.bullets li{position:relative;padding-left:18px;margin-bottom:6px;font-size:15px;color:#374151}
.bullets li::before{content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.tags.big span{font-size:15px;padding:8px 18px}

/* 联系 */
.contact-cards .card{text-align:center}
.contact-cards .card p{font-size:16px}

/* 页脚 */
footer{border-top:1px solid var(--line);padding:26px 0;color:var(--muted);font-size:14px;text-align:center;background:#fff}

/* 移动端 */
@media (max-width:720px){
  .about-grid{grid-template-columns:1fr}
  .menu-btn{display:block}
  .links{position:absolute;top:60px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line);display:none}
  .links.open{display:flex}
  .links a{padding:14px 20px;border-top:1px solid var(--line)}
  .hero{padding:64px 0 56px}
  .section{padding:48px 0}
}

/* ===== v20261012c 优化新增 ===== */
.brand{display:flex;align-items:center;gap:10px}
.brand-avatar{width:34px;height:34px;border-radius:50%;object-fit:cover;border:2px solid var(--accent)}
.hero-inner{display:flex;gap:30px;align-items:center}
.avatar{width:132px;height:132px;border-radius:50%;object-fit:cover;flex-shrink:0;border:4px solid rgba(255,255,255,.85);box-shadow:0 10px 28px rgba(0,0,0,.3)}
.hero-main{flex:1;min-width:0}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:44px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);padding:22px 10px}
.stats div{text-align:center}
.stats dt{font-size:30px;font-weight:800;color:#fff}
.stats dd{font-size:13px;color:#c7d2fe;margin:4px 0 0}

/* 滚动显现 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* 导航高亮 */
.links a.active{color:var(--accent);font-weight:700}

/* 作品二维码 */
.work-flex{display:flex;gap:20px;align-items:flex-start;justify-content:space-between}
.work-flex>div{flex:1;min-width:0}
.qr{flex-shrink:0;text-align:center;margin:0}
.qr img{width:110px;height:110px;border:1px solid var(--line);border-radius:8px;background:#fff}
.qr figcaption{font-size:12px;color:var(--muted);margin-top:6px}

/* 大联系按钮 */
.contact-big{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-top:26px}
.contact-btn{display:flex;flex-direction:column;gap:4px;background:var(--card);border:1.5px solid var(--line);border-radius:var(--radius);padding:20px 24px;box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.contact-btn:hover{text-decoration:none;transform:translateY(-3px);border-color:var(--accent)}
.cb-label{font-size:14px;color:var(--muted)}
.cb-value{font-size:20px;font-weight:700;color:var(--text);word-break:break-all}

/* 回到顶部 */
.back-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;border:none;background:var(--accent);color:#fff;font-size:20px;cursor:pointer;box-shadow:0 8px 20px rgba(37,99,235,.4);opacity:0;pointer-events:none;transition:opacity .3s;z-index:60}
.back-top.show{opacity:1;pointer-events:auto}

@media (max-width:720px){
  .hero-inner{flex-direction:column;text-align:center}
  .hero-btns{justify-content:center}
  .stats{grid-template-columns:repeat(2,1fr);gap:18px}
  .stats dt{font-size:24px}
  .work-flex{flex-direction:column}
  .qr{align-self:center}
}

/* 打印：HR 打印成纸质版也好看 */
@media print{
  .nav,.hero-btns,.menu-btn,.back-top,.qr{display:none}
  .hero{background:none;color:#000;padding:20px 0}
  .hero h1,.hero h1 .accent,.hero-sub,.hero-goal,.hero-goal strong,.hero-kicker{color:#000}
  .hero-kicker,.hero-goal strong{border:1px solid #999;background:none}
  .stats{background:none;border:1px solid #999}
  .stats dt,.stats dd{color:#000}
  .section{padding:24px 0}
  .card,.fact-list li,.timeline li{box-shadow:none;break-inside:avoid}
  .reveal{opacity:1;transform:none}
  a{color:#000;text-decoration:none}
  footer{border-top:1px solid #999}
}