/* ============ 像素夜空 · 仅用深蓝 / 暗灰 / 纯白 ============ */
:root{
  --bg0:#070b16;
  --panel:rgba(11,16,30,.74);
  --line:#223357;
  --line-soft:#1a2745;
  --txt:#e9eef9;
  --dim:#96a5c6;
  --faint:#5d6d92;
  --white:#ffffff;
  --px:'Fusion Pixel','PingFang SC','Microsoft YaHei',sans-serif;
  --body:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
}
@font-face{
  font-family:'Fusion Pixel';
  src:url('assets/fonts/fusion-pixel.woff2') format('woff2');
  font-display:swap;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg0);
  color:var(--txt);
  font-family:var(--body);
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
}
::selection{background:#dbe6ff;color:#0a0f1e}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#0a0f1e}
::-webkit-scrollbar-thumb{background:#223357;border:2px solid #0a0f1e}
::-webkit-scrollbar-thumb:hover{background:#34487a}
a{color:var(--txt);text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px dashed #dbe6ff;outline-offset:3px}

/* ---- 背景画布与粒子画布 ---- */
#sky{
  position:fixed;inset:0;width:100%;height:100%;
  image-rendering:pixelated;image-rendering:crisp-edges;
  z-index:-1;display:block;
}
#dust{position:fixed;inset:0;width:100%;height:100%;z-index:60;pointer-events:none}

/* ---- 导航 ---- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  height:56px;padding:0 22px;
  background:rgba(7,11,22,.62);
  border-bottom:1px solid var(--line-soft);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.nav-logo{font-family:var(--px);font-size:12px;letter-spacing:2px;display:flex;align-items:center;gap:8px}
.nav-logo svg{flex:none}
.nav-links{display:flex;gap:4px}
.nav-links a{
  font-size:13px;color:var(--dim);padding:6px 12px;letter-spacing:1px;
  border:1px solid transparent;transition:color .2s,border-color .2s;
}
.nav-links a:hover{color:var(--white);border-color:var(--line)}

/* ---- 导航下拉「简历介绍」 ---- */
.nav-dd{position:relative}
.nav-dd-btn{
  font-family:inherit;font-size:13px;color:var(--dim);background:none;cursor:pointer;
  padding:6px 12px;letter-spacing:1px;border:1px solid transparent;
  display:flex;align-items:center;gap:7px;transition:color .2s,border-color .2s;
}
.nav-dd-btn:hover,.nav-dd.open .nav-dd-btn{color:var(--white);border-color:var(--line)}
.nav-dd-btn .caret{flex:none;transition:transform .2s}
.nav-dd.open .caret{transform:rotate(180deg)}
.nav-dd-menu{
  position:absolute;top:calc(100% + 8px);right:0;min-width:132px;z-index:70;
  background:rgba(9,13,25,.97);border:1px solid var(--line);
  display:none;flex-direction:column;padding:6px;
  box-shadow:0 8px 24px rgba(0,0,0,.45);
}
.nav-dd.open .nav-dd-menu{display:flex}
@media (hover:hover){
  .nav-dd:hover .nav-dd-menu{display:flex}
}
.nav-dd-menu a{
  font-size:13px;color:var(--dim);padding:8px 12px;letter-spacing:1px;
  display:flex;align-items:center;border:none;
}
.nav-dd-menu a::before{
  content:'';width:4px;height:4px;background:transparent;margin-right:10px;flex:none;
}
.nav-dd-menu a:hover{color:var(--white);background:rgba(34,51,87,.4)}
.nav-dd-menu a:hover::before{background:#dbe6ff}
.nav-page-cur{color:var(--white)!important;border-color:var(--line)!important}

/* ---- 首屏 ---- */
.hero{
  min-height:100svh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:96px 24px 64px;position:relative;
}
.hero-micro{
  font-family:var(--px);font-size:12px;color:var(--dim);letter-spacing:4px;
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px 12px;
  max-width:100%;margin-bottom:28px;
}
.hero-name{
  font-family:var(--px);font-weight:400;
  font-size:clamp(36px,7vw,72px);
  line-height:1.3;letter-spacing:.14em;color:var(--white);
  text-shadow:0 0 18px rgba(220,232,255,.28);
}
.hero-roman{
  font-family:var(--px);font-size:12px;color:var(--faint);
  letter-spacing:6px;margin-top:16px;
}
.hero-sub{margin-top:22px;font-size:17px;color:var(--dim);letter-spacing:2px;width:100%;max-width:34em}
.hero-mail{
  margin-top:34px;display:inline-flex;align-items:center;gap:10px;
  font-family:var(--px);font-size:12px;letter-spacing:1px;
  padding:12px 20px;border:1px solid var(--line);background:var(--panel);
  transition:border-color .2s,box-shadow .2s;
}
.hero-mail:hover{border-color:#dbe6ff;box-shadow:0 0 14px rgba(219,230,255,.18)}
.hero-mail svg{flex:none}
.scroll-cue{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  font-family:var(--px);font-size:12px;color:var(--faint);letter-spacing:3px;
  display:flex;flex-direction:column;align-items:center;gap:8px;
}
.scroll-cue .arr{animation:bob 2.4s steps(4) infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(6px)}}

/* ---- 区块通用 ---- */
.section{padding:110px 24px 40px;max-width:860px;margin:0 auto}
.sec-title{
  font-family:var(--px);font-weight:400;font-size:24px;letter-spacing:.12em;
  display:flex;align-items:center;gap:14px;margin-bottom:14px;color:var(--white);
}
.sec-title em{
  font-style:normal;font-size:12px;color:var(--faint);letter-spacing:4px;
}
.sec-rule{height:8px;margin:0 0 42px;
  background:repeating-conic-gradient(var(--line) 0% 25%,transparent 0% 50%);
  background-size:4px 4px;opacity:.45;
  -webkit-mask-image:linear-gradient(90deg,#000 0 64%,transparent);
  mask-image:linear-gradient(90deg,#000 0 64%,transparent);
}
.card{
  background:var(--panel);border:1px solid var(--line);
  padding:26px 28px;position:relative;
}
.card::before,.card::after{
  content:'';position:absolute;width:5px;height:5px;background:var(--line);
}
.card::before{top:-1px;left:-1px}
.card::after{bottom:-1px;right:-1px}

/* ---- 关于 ---- */
.about-text{color:var(--dim);max-width:46em}
.about-text b{color:var(--txt);font-weight:600}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:26px}
.stat{border:1px solid var(--line);background:var(--panel);padding:16px 12px;text-align:center}
.stat .n{font-family:var(--px);font-size:24px;color:var(--white);line-height:1.4}
.stat .l{font-size:12px;color:var(--faint);margin-top:6px;letter-spacing:1px}

/* ---- 时间线（教育 / 实习） ---- */
.tl{border-left:2px solid var(--line-soft);display:flex;flex-direction:column;gap:30px}
.tl-item{position:relative;padding-left:30px}
.tl-item::before{
  content:'';position:absolute;left:-7px;top:8px;width:12px;height:12px;
  background:var(--line);
}
.tl-item.now::before{background:var(--white);box-shadow:0 0 10px rgba(255,255,255,.55)}
.tl-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 14px}
.tl-head h3{font-family:var(--px);font-weight:400;font-size:18px;letter-spacing:.08em;color:var(--white)}
.tl-role{font-size:14px;color:var(--dim)}
.tl-time{font-family:var(--px);font-size:12px;color:var(--faint);letter-spacing:1px;margin-left:auto}
.tag{
  font-family:var(--px);font-size:12px;color:var(--dim);
  border:1px solid var(--line);padding:2px 8px;letter-spacing:1px;white-space:nowrap;
}
.tl-body{margin-top:12px;color:var(--dim);font-size:15px}
.tl-body ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.tl-body li{position:relative;padding-left:18px}
.tl-body li::before{
  content:'';position:absolute;left:0;top:.72em;width:6px;height:6px;background:var(--faint);
}
.tl-body b{color:var(--txt);font-weight:600}
.tl-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.tl-stats span{
  font-family:var(--px);font-size:12px;color:var(--txt);
  border:1px solid var(--line);background:rgba(17,26,48,.6);
  padding:6px 12px;letter-spacing:1px;
}
.tl-sub{color:var(--faint);font-size:14px;margin-top:6px}
.courses{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.courses span{font-size:13px;color:var(--dim);border:1px solid var(--line-soft);padding:3px 10px}

/* ---- 项目与荣誉 ---- */
.award-list{list-style:none;margin-top:22px;display:flex;flex-direction:column;gap:0}
.award-list li{
  display:flex;gap:16px;align-items:baseline;
  padding:13px 4px;border-bottom:1px dashed var(--line-soft);font-size:15px;
}
.award-list li:last-child{border-bottom:none}
.award-list .d{font-family:var(--px);font-size:12px;color:var(--faint);flex:none;width:74px;letter-spacing:1px}
.award-list .n{color:var(--txt)}
.award-list .r{color:var(--dim);margin-left:auto;text-align:right;font-size:14px}

/* ---- 技能 ---- */
.skill-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.skill{border:1px solid var(--line);background:var(--panel);padding:18px 20px;display:flex;align-items:baseline;gap:16px}
.skill .k{font-family:var(--px);font-size:12px;color:var(--faint);letter-spacing:2px;flex:none;width:44px}
.skill .v{font-size:15px;color:var(--txt)}

/* ---- 联络 / 页脚 ---- */
.contact-box{text-align:center;padding:60px 28px}
.contact-mail{
  font-family:var(--px);font-size:clamp(14px,3vw,24px);letter-spacing:2px;color:var(--white);
  display:inline-flex;align-items:center;gap:14px;padding:18px 30px;
  border:1px solid var(--line);background:var(--panel);
  transition:border-color .2s,box-shadow .2s;
}
.contact-mail:hover{border-color:#dbe6ff;box-shadow:0 0 20px rgba(219,230,255,.2)}
.contact-note{margin-top:20px;color:var(--faint);font-size:14px;letter-spacing:1px}
.footer{
  margin-top:100px;padding:34px 24px 42px;text-align:center;
  border-top:1px solid var(--line-soft);color:var(--faint);font-size:13px;
  display:flex;flex-direction:column;gap:10px;align-items:center;
}
.footer .px{font-family:var(--px);font-size:12px;letter-spacing:2px}
.footer a{color:var(--dim)}
.footer a:hover{color:var(--white)}

/* ---- 入场动画（steps 营造 8-bit 顿挫感） ---- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s steps(8),transform .6s steps(8)}
.reveal.in{opacity:1;transform:none}

@media (max-width:720px){
  .nav{padding:0 14px}
  .nav-logo{letter-spacing:1px}
  .nav-links a,.nav-dd-btn{font-size:12px;padding:6px 8px}
  .nav-dd-menu{min-width:118px}
  .hero-micro{letter-spacing:2px}
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .skill-grid{grid-template-columns:1fr}
  .tl-time{margin-left:0;width:100%}
  .section{padding:84px 18px 30px}
  .award-list li{flex-wrap:wrap}
  .award-list .r{margin-left:0;width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{transition:none;opacity:1;transform:none}
  .scroll-cue .arr{animation:none}
}

/* ================= 作品集页 ================= */
.pf-hero{padding:150px 24px 20px;max-width:860px;margin:0 auto}
.pf-hero h1{
  font-family:var(--px);font-weight:400;font-size:clamp(28px,5vw,44px);
  letter-spacing:.12em;color:var(--white);text-shadow:0 0 16px rgba(220,232,255,.25);
}
.pf-hero .en{font-family:var(--px);font-size:12px;color:var(--faint);letter-spacing:5px;margin-top:14px}
.pf-hero .desc{color:var(--dim);margin-top:16px;font-size:15px;max-width:34em}
.pf-intro{color:var(--dim);font-size:15px;margin:-24px 0 24px;max-width:38em}
.pf-intro b{color:var(--txt);font-weight:600}

.work-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.work-grid.single{grid-template-columns:1fr}
.work{
  border:1px solid var(--line);background:var(--panel);padding:10px;margin:0;
  cursor:zoom-in;transition:border-color .2s;
}
.work:hover{border-color:#5d6d92}
.work img{display:block;width:100%;height:auto}
.work figcaption{font-size:13px;color:var(--faint);padding:10px 4px 2px;letter-spacing:1px}

/* ---- 灯箱 ---- */
.lightbox{
  position:fixed;inset:0;z-index:90;background:rgba(5,8,16,.93);
  display:none;align-items:center;justify-content:center;padding:20px;cursor:zoom-out;
}
.lightbox.show{display:flex}
.lightbox img{max-width:96vw;max-height:92vh;border:1px solid var(--line)}

@media (max-width:720px){
  .pf-hero{padding:120px 18px 12px}
  .work-grid{grid-template-columns:1fr}
}