:root{
  --bg:#f6f7f4;
  --ink:#141c1a;
  --ink-soft:#4c5754;
  --line:#d9ded9;
  --accent:#0e7c66;
  --accent-soft:#e3f0ea;
  --card:#ffffff;
  --radius:16px;
  --wrap:1120px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* 纸张颗粒感 */
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.35;
  background-image:radial-gradient(rgba(20,28,26,.055) 1px,transparent 1px);
  background-size:3px 3px;
}

.wrap{width:min(100% - 2.5rem,var(--wrap));margin-inline:auto;position:relative;z-index:2}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  background:rgba(246,247,244,.82);
  border-bottom:1px solid rgba(217,222,217,.7);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:600;letter-spacing:.08em;font-size:15px}
.brand span{color:var(--accent)}
.links{display:flex;gap:26px;font-size:14px;color:var(--ink-soft)}
.links a{position:relative;padding:4px 0}
.links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--accent);transition:width .25s ease}
.links a:hover{color:var(--ink)}
.links a:hover::after{width:100%}
.menu-btn{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  background:transparent;padding:0;cursor:pointer;position:relative;
}
.menu-btn span{position:absolute;left:11px;width:18px;height:1.5px;background:var(--ink);transition:.25s}
.menu-btn span:nth-child(1){top:15px}
.menu-btn span:nth-child(2){top:23px}
.menu-btn[aria-expanded="true"] span:nth-child(1){top:19px;transform:rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){top:19px;transform:rotate(-45deg)}

/* ---------- 首屏 ---------- */
.hero{
  display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
  padding:clamp(56px,8vw,104px) 0 clamp(48px,6vw,80px);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.04em;color:var(--ink-soft);
  border:1px solid var(--line);border-radius:999px;padding:5px 12px;background:rgba(255,255,255,.6);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
h1{
  font-size:clamp(2.1rem,5.2vw,3.6rem);line-height:1.18;letter-spacing:-.02em;
  margin:22px 0 0;font-weight:600;
}
h1 em{font-style:normal;color:var(--accent)}
.lede{margin:20px 0 0;max-width:34em;color:var(--ink-soft);font-size:clamp(15px,1.5vw,17px)}
.cta{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 22px;border-radius:999px;font-size:14px;font-weight:500;
  transition:transform .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn.primary{background:var(--ink);color:#f6f7f4}
.btn.primary:hover{background:var(--accent);transform:translateY(-2px)}
.btn.ghost{border:1px solid var(--line);color:var(--ink-soft)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.stats{display:flex;gap:32px;margin:44px 0 0;flex-wrap:wrap}
.stats div{display:flex;flex-direction:column;gap:2px}
.stats dt{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#8b9691}
.stats dd{margin:0;font-size:13.5px;font-weight:500}

/* 终端卡片 */
.hero-card{
  background:#101a17;border-radius:18px;color:#d7e5df;
  box-shadow:0 24px 60px -24px rgba(16,26,23,.45),0 2px 0 rgba(255,255,255,.04) inset;
  overflow:hidden;
}
.term-head{display:flex;align-items:center;gap:7px;padding:12px 16px;background:#16221e;border-bottom:1px solid rgba(255,255,255,.06)}
.term-head span{width:9px;height:9px;border-radius:50%;background:#3b4a45}
.term-head span:first-child{background:#e06c5a}
.term-head span:nth-child(2){background:#e0b45a}
.term-head span:nth-child(3){background:#5abe8a}
.term-head b{margin-left:auto;font:400 11px/1 ui-monospace,monospace;color:#7f938c;letter-spacing:.06em}
.term-body{margin:0;padding:20px 18px 22px;font:400 12.5px/1.9 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap;word-break:break-word}
.c-dim{color:#6c837b}
.c-ok{color:#5fd39a}
.caret{display:inline-block;width:7px;height:13px;background:#5fd39a;vertical-align:-2px;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.term-foot{padding:10px 18px;border-top:1px solid rgba(255,255,255,.06);font-size:11px;color:#7f938c;letter-spacing:.04em}

/* ---------- 通用 section ---------- */
.section{padding:clamp(48px,6vw,76px) 0;border-top:1px solid var(--line)}
.kicker{font:500 11px/1 ui-monospace,monospace;letter-spacing:.18em;color:var(--accent);text-transform:uppercase;margin:0 0 18px}
h2{font-size:clamp(1.5rem,3vw,2rem);line-height:1.3;letter-spacing:-.01em;margin:0 0 34px;font-weight:600}

/* 关于 */
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.about-grid h2{margin:0;font-size:clamp(1.35rem,2.4vw,1.85rem)}
.about-text p{margin:0 0 16px;color:var(--ink-soft)}
.about-text p:last-child{margin-bottom:0}

/* 技能 */
.skill-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.skill-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.skill-card:hover{transform:translateY(-4px);border-color:#bcd6ca;box-shadow:0 16px 32px -20px rgba(14,124,102,.35)}
.skill-card h3{margin:0 0 8px;font-size:15px;font-weight:600;letter-spacing:.01em}
.skill-card p{margin:0 0 14px;font-size:13.5px;line-height:1.65;color:var(--ink-soft)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none}
.chips li{font-size:11.5px;padding:3px 9px;border-radius:999px;background:var(--accent-soft);color:#0b5d4e;letter-spacing:.02em}

/* 项目 */
.work-list{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line)}
.work{padding:26px 0;border-bottom:1px solid var(--line);transition:padding-left .25s ease}
.work:hover{padding-left:10px}
.work-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap}
.work-head .idx{font:400 11px/1 ui-monospace,monospace;color:#93a09b;letter-spacing:.1em}
.work-head h3{margin:0;font-size:clamp(1rem,1.8vw,1.18rem);font-weight:600;flex:1 1 auto}
.tag{font-size:11px;padding:3px 9px;border-radius:999px;border:1px solid var(--line);color:var(--ink-soft);white-space:nowrap}
.tag:first-letter{color:var(--accent)}
.work p{margin:10px 0 14px;max-width:62em;font-size:14px;color:var(--ink-soft)}

/* 时间线 */
.timeline{list-style:none;margin:0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:74px;top:6px;bottom:6px;width:1px;background:var(--line)}
.timeline li{display:grid;grid-template-columns:74px 1fr;gap:28px;padding:0 0 32px;position:relative}
.timeline li:last-child{padding-bottom:0}
.timeline .t{font:400 11px/1.6 ui-monospace,monospace;color:#93a09b;letter-spacing:.08em;padding-top:2px}
.timeline li>div{position:relative;padding-left:0}
.timeline li>div::before{
  content:"";position:absolute;left:-32px;top:7px;width:7px;height:7px;border-radius:50%;
  background:var(--bg);border:1.5px solid var(--accent);
}
.timeline h3{margin:0 0 4px;font-size:15px;font-weight:600}
.timeline p{margin:0;font-size:13.5px;color:var(--ink-soft);max-width:56em}

/* 联系 */
.contact{border-bottom:1px solid var(--line)}
.contact h2{margin-bottom:14px}
.contact-lede{max-width:38em;color:var(--ink-soft);margin:0 0 28px}
.contact-links{display:flex;flex-wrap:wrap;gap:14px}
.contact-links a{
  font:500 14px/1 ui-monospace,monospace;padding:13px 20px;border-radius:12px;
  background:var(--card);border:1px solid var(--line);transition:.25s ease;letter-spacing:.02em;
}
.contact-links a:hover{background:var(--ink);color:#f6f7f4;border-color:var(--ink);transform:translateY(-2px)}
.contact-note{margin:18px 0 0;font-size:12px;color:#93a09b}

/* 页脚 */
.foot{display:flex;justify-content:space-between;gap:16px;padding:26px 0 40px;font-size:12px;color:#93a09b;flex-wrap:wrap}

/* 首屏入场（仅视觉，不影响内容可见性） */
.hero-copy{animation:rise .7s ease both}
.hero-card{animation:rise .7s .12s ease both}
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .hero{grid-template-columns:1fr;gap:40px;padding-top:48px}
  .hero-card{transform:none}
  .about-grid{grid-template-columns:1fr;gap:20px}
  .skill-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .links{
    position:absolute;top:64px;left:0;right:0;
    flex-direction:column;gap:0;padding:8px 20px 16px;
    background:rgba(246,247,244,.98);border-bottom:1px solid var(--line);
    display:none;
  }
  .links.open{display:flex}
  .links a{padding:12px 0;border-bottom:1px solid rgba(217,222,217,.6);font-size:15px}
  .links a:last-child{border-bottom:0}
  .links a::after{display:none}
  .menu-btn{display:block}
  .skill-grid{grid-template-columns:1fr}
  .stats{gap:22px}
  .stats div{min-width:84px}
  .timeline::before{left:56px}
  .timeline li{grid-template-columns:56px 1fr;gap:20px}
  .timeline li>div::before{left:-24px}
  .term-body{font-size:11.5px}
  h1{font-size:2rem}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}