/* ===== 设计令牌 ===== */
:root{
  --bg:#0f1115;
  --bg-alt:#161a22;
  --surface:#1c212b;
  --surface-2:#232a36;
  --text:#e8eaf0;
  --text-dim:#a3acbd;
  --text-faint:#6b7488;
  --accent:#6ea8fe;
  --accent-2:#9d8cff;
  --accent-grad:linear-gradient(120deg,#6ea8fe,#9d8cff);
  --line:rgba(255,255,255,.08);
  --radius:16px;
  --maxw:1080px;
  --serif:"Noto Serif SC",serif;
  --sans:"Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-weight:300;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
strong{color:var(--text);font-weight:700}
em{font-style:normal;color:var(--text-faint);font-size:.88em}

/* ===== 导航 ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  backdrop-filter:blur(12px);
  background:rgba(15,17,21,.55);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s;
}
.nav.scrolled{background:rgba(15,17,21,.9);border-bottom-color:var(--line)}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 24px;
}
.logo{font-family:var(--serif);font-weight:700;font-size:1.4rem;letter-spacing:1px}
.logo span{color:var(--accent)}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:.92rem;color:var(--text-dim);transition:color .2s;position:relative}
.nav-links a:hover{color:var(--text)}
.nav-links a:not(.nav-cta)::after{
  content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;
  background:var(--accent-grad);transition:width .25s;
}
.nav-links a:not(.nav-cta):hover::after{width:100%}
.nav-cta{
  padding:8px 18px;border-radius:999px;
  background:var(--accent-grad);color:#0f1115!important;font-weight:500;
}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer}

/* ===== 首屏 ===== */
.hero{
  position:relative;min-height:100vh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:120px 24px 80px;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(60% 60% at 20% 20%,rgba(110,168,254,.18),transparent 60%),
    radial-gradient(50% 50% at 85% 30%,rgba(157,140,255,.16),transparent 60%),
    radial-gradient(40% 40% at 50% 90%,rgba(110,168,254,.10),transparent 60%);
  animation:floatbg 14s ease-in-out infinite alternate;
}
@keyframes floatbg{from{transform:translateY(0) scale(1)}to{transform:translateY(-20px) scale(1.05)}}
.hero-content{position:relative;z-index:1;max-width:780px}
.hero-photo{
  width:140px;height:140px;margin:0 auto 26px;border-radius:50%;
  padding:4px;background:var(--accent-grad);
  box-shadow:0 12px 40px rgba(110,168,254,.35);
  animation:photoIn .9s ease both;
}
.hero-photo img{
  width:100%;height:100%;border-radius:50%;object-fit:cover;
  object-position:center top;border:3px solid var(--bg);display:block;
}
@keyframes photoIn{from{opacity:0;transform:translateY(-16px) scale(.85)}to{opacity:1;transform:none}}
.hero-eyebrow{
  color:var(--accent);letter-spacing:4px;font-size:.8rem;font-weight:500;
  text-transform:uppercase;margin-bottom:18px;
}
.hero-name{
  font-family:var(--serif);font-weight:700;
  font-size:clamp(3rem,9vw,6rem);line-height:1;letter-spacing:4px;
  background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;margin-bottom:22px;
}
.hero-title{font-size:1.25rem;color:var(--text);font-weight:400;margin-bottom:6px}
.hero-sub{color:var(--text-dim);font-size:1rem;margin-bottom:36px}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.btn{padding:13px 30px;border-radius:999px;font-weight:500;font-size:.95rem;transition:transform .2s,box-shadow .2s,background .2s}
.btn-primary{background:var(--accent-grad);color:#0f1115;box-shadow:0 8px 30px rgba(110,168,254,.3)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 38px rgba(110,168,254,.45)}
.btn-ghost{border:1px solid var(--line);color:var(--text)}
.btn-ghost:hover{background:var(--surface);transform:translateY(-3px)}
.hero-tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.hero-tags span{
  font-size:.8rem;color:var(--text-dim);
  padding:6px 14px;border:1px solid var(--line);border-radius:999px;
  background:rgba(255,255,255,.02);
}
.scroll-cue{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  z-index:1;font-size:1.4rem;color:var(--text-faint);animation:bob 1.8s ease-in-out infinite;
}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,10px)}}

/* ===== 区块通用 ===== */
.section{max-width:var(--maxw);margin:0 auto;padding:100px 24px}
.section-alt{background:var(--bg-alt);max-width:none}
.section-alt > *{max-width:var(--maxw);margin-left:auto;margin-right:auto}
.section-head{display:flex;align-items:baseline;gap:16px;margin-bottom:50px}
.section-head.center{justify-content:center}
.section-no{font-family:var(--serif);color:var(--accent);font-size:1rem;opacity:.7}
.section-head h2{
  font-family:var(--serif);font-weight:700;font-size:clamp(1.7rem,4vw,2.6rem);
  letter-spacing:2px;
}

/* ===== 关于 ===== */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:50px;align-items:center}
.about-text p{color:var(--text-dim);margin-bottom:18px;font-size:1.02rem}
.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.stat{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 18px;text-align:center;transition:transform .25s,border-color .25s;
}
.stat:hover{transform:translateY(-4px);border-color:rgba(110,168,254,.4)}
.stat-num{
  display:block;font-family:var(--serif);font-weight:700;font-size:2rem;
  background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.stat-label{display:block;color:var(--text-faint);font-size:.82rem;margin-top:4px}

/* ===== 教育 ===== */
.edu-card{
  display:flex;justify-content:space-between;align-items:flex-start;gap:24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;border-left:3px solid var(--accent);
}
.edu-main h3{font-family:var(--serif);font-size:1.3rem;font-weight:700;margin-bottom:8px}
.edu-degree{color:var(--text);font-weight:400;margin-bottom:6px}
.edu-meta{color:var(--text-dim);font-size:.9rem}
.edu-date{color:var(--accent);font-size:.9rem;white-space:nowrap;font-weight:500}

/* ===== 时间线 ===== */
.timeline{position:relative;padding-left:34px}
.timeline::before{
  content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--accent),var(--accent-2),transparent);
}
.tl-item{position:relative;margin-bottom:34px}
.tl-dot{
  position:absolute;left:-34px;top:26px;width:14px;height:14px;border-radius:50%;
  background:var(--bg);border:3px solid var(--accent);box-shadow:0 0 0 4px rgba(110,168,254,.12);
}
.tl-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 28px;transition:transform .25s,border-color .25s;
}
.tl-card:hover{transform:translateX(6px);border-color:rgba(110,168,254,.35)}
.tl-top{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap}
.tl-top h3{font-family:var(--serif);font-size:1.2rem;font-weight:700}
.tl-date{color:var(--accent);font-size:.85rem;white-space:nowrap}
.tl-role{color:var(--accent-2);font-weight:500;margin:4px 0 14px;font-size:.95rem}
.tl-card ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.tl-card li{position:relative;padding-left:20px;color:var(--text-dim);font-size:.95rem}
.tl-card li::before{content:"▹";position:absolute;left:0;color:var(--accent)}

/* ===== 卡片网格（领导力）===== */
.card-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.lead-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;transition:transform .25s,border-color .25s;
}
.lead-card:hover{transform:translateY(-5px);border-color:rgba(157,140,255,.4)}
.lead-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:4px}
.lead-top h3{font-family:var(--serif);font-size:1.15rem;font-weight:700}
.badge{
  background:rgba(157,140,255,.15);color:var(--accent-2);
  font-size:.75rem;padding:4px 12px;border-radius:999px;white-space:nowrap;
}
.lead-date{color:var(--text-faint);font-size:.82rem;display:block;margin-bottom:16px}
.lead-card ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.lead-card li{position:relative;padding-left:20px;color:var(--text-dim);font-size:.93rem}
.lead-card li::before{content:"▹";position:absolute;left:0;color:var(--accent-2)}

/* ===== 技能 ===== */
.skills-wrap{display:flex;flex-direction:column;gap:30px}
.skill-group h4{font-size:.95rem;color:var(--text-faint);margin-bottom:14px;letter-spacing:1px}
.chips{display:flex;flex-wrap:wrap;gap:12px}
.chip{
  padding:9px 18px;border-radius:10px;font-size:.9rem;color:var(--text);
  background:var(--surface);border:1px solid var(--line);transition:.22s;
}
.chip:hover{background:var(--surface-2);border-color:var(--accent);transform:translateY(-3px)}

/* ===== 荣誉 ===== */
.awards-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.awards-list li{display:flex;align-items:center;gap:14px;color:var(--text-dim);font-size:1rem}
.aw-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-grad);flex-shrink:0}

/* ===== 联系 ===== */
.contact{text-align:center}
.contact-lead{color:var(--text-dim);margin-bottom:36px;font-size:1.05rem}
.contact-links{display:flex;gap:24px;justify-content:center;flex-wrap:wrap}
.contact-card{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 40px;min-width:260px;transition:transform .25s,border-color .25s;
}
.contact-card:hover{transform:translateY(-5px);border-color:var(--accent)}
.contact-icon{font-size:1.6rem;color:var(--accent)}
.contact-label{color:var(--text-faint);font-size:.8rem}
.contact-val{color:var(--text);font-weight:400}

/* ===== 页脚 ===== */
.footer{text-align:center;padding:40px 24px;color:var(--text-faint);font-size:.85rem;border-top:1px solid var(--line)}

/* ===== 进入动画 ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:860px){
  .about-grid{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
}
@media(max-width:680px){
  .nav-links{
    position:fixed;top:62px;right:0;flex-direction:column;
    background:rgba(15,17,21,.97);backdrop-filter:blur(12px);
    padding:24px 28px;gap:18px;border-left:1px solid var(--line);border-bottom:1px solid var(--line);
    border-bottom-left-radius:16px;transform:translateX(110%);transition:transform .3s;
  }
  .nav-links.open{transform:translateX(0)}
  .nav-toggle{display:block}
  .edu-card{flex-direction:column;gap:12px}
  .section{padding:70px 20px}
}