/* ============================================================
   戴诚 · 个人作品集   纯 HTML/CSS/JS，无框架、无构建、无外链字体
   ============================================================ */

:root{
  --bg:#05060a;
  --fg:#f5f7fb;
  --muted:#8f97ab;
  --faint:#5d6479;
  --line:rgba(255,255,255,.09);
  --card:rgba(255,255,255,.035);
  --c1:#7c6cff;
  --c2:#25d4d4;
  --c3:#ff7a45;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"Cascadia Mono",Consolas,"SF Mono",Menlo,monospace;
  --ease:cubic-bezier(.22,.75,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--fg);font-family:var(--sans);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
  font-feature-settings:"kern" 1;
}
a{color:inherit;text-decoration:none}
.muted{color:var(--muted)}
.small{font-size:13px}

/* ============================================================
   背景：极光 + 网格 + 噪点
   ============================================================ */
.bg{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.aurora{position:absolute;border-radius:50%;filter:blur(110px);will-change:transform}
.a1{width:820px;height:620px;top:-240px;left:-160px;
    background:radial-gradient(circle,rgba(124,108,255,.55),transparent 70%);
    animation:float1 26s var(--ease) infinite}
.a2{width:700px;height:560px;top:-160px;right:-200px;
    background:radial-gradient(circle,rgba(37,212,212,.38),transparent 70%);
    animation:float2 32s var(--ease) infinite}
.a3{width:900px;height:640px;top:52%;left:26%;
    background:radial-gradient(circle,rgba(255,122,69,.18),transparent 70%);
    animation:float3 38s var(--ease) infinite}
@keyframes float1{0%,100%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(90px,70px,0) scale(1.16)}}
@keyframes float2{0%,100%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(-110px,90px,0) scale(1.1)}}
@keyframes float3{0%,100%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(70px,-80px,0) scale(1.2)}}

.grid{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),
                   linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:76px 76px;
  -webkit-mask-image:radial-gradient(120% 80% at 50% 0%,#000 20%,transparent 72%);
  mask-image:radial-gradient(120% 80% at 50% 0%,#000 20%,transparent 72%)}

.noise{position:absolute;inset:0;opacity:.055;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

.vignette{position:absolute;inset:0;
  background:radial-gradient(120% 90% at 50% 42%,transparent 42%,rgba(2,3,7,.72) 100%)}

/* 鼠标跟随光斑 */
.cursor-glow{position:fixed;z-index:1;width:520px;height:520px;border-radius:50%;
  left:0;top:0;pointer-events:none;opacity:0;transition:opacity .5s;
  background:radial-gradient(circle,rgba(124,108,255,.16),transparent 62%);
  transform:translate3d(-50%,-50%,0);will-change:transform}

/* ============================================================
   滚动进度条 + 顶栏
   ============================================================ */
.progress{position:fixed;z-index:60;left:0;top:0;height:2px;width:100%;background:transparent}
.progress i{display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--c1),var(--c2),var(--c3));
  box-shadow:0 0 14px rgba(124,108,255,.7)}

.nav{position:fixed;z-index:50;left:0;right:0;top:0;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 46px;transition:padding .4s var(--ease),background .4s,border-color .4s;
  border-bottom:1px solid transparent}
.nav.solid{padding:12px 46px;background:rgba(6,7,12,.72);
  border-bottom-color:var(--line);backdrop-filter:blur(18px) saturate(140%)}
.brand{font-family:var(--mono);font-size:16px;font-weight:600;letter-spacing:-.02em}
.brand span{background:linear-gradient(100deg,var(--c1),var(--c2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.nav nav{display:flex;gap:30px;font-size:14px;color:var(--muted)}
.nav nav a{position:relative;transition:color .3s}
.nav nav a:hover{color:var(--fg)}
.nav nav a:after{content:"";position:absolute;left:0;bottom:-6px;height:1px;width:0;
  background:linear-gradient(90deg,var(--c1),var(--c2));transition:width .35s var(--ease)}
.nav nav a:hover:after{width:100%}
.cta-mini{font-family:var(--mono);font-size:12.5px;color:var(--fg);
  border:1px solid var(--line);border-radius:999px;padding:8px 16px;
  background:rgba(255,255,255,.04);backdrop-filter:blur(12px);transition:.3s var(--ease)}
.cta-mini:hover{background:rgba(255,255,255,.1);transform:translateY(-1px)}

/* ============================================================
   首屏
   ============================================================ */
main{position:relative;z-index:2}
/* position:relative 不能少 —— 少了这行，"SCROLL" 提示会跑到 main 的最底下 */
.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;padding:130px 24px 90px}
.hero-inner{max-width:960px}
.pill{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);
  font-size:12px;letter-spacing:.12em;color:#cfd3e6;
  border:1px solid rgba(124,108,255,.4);border-radius:999px;padding:8px 18px;
  background:linear-gradient(180deg,rgba(124,108,255,.2),rgba(124,108,255,.05));
  box-shadow:0 0 34px rgba(124,108,255,.3)}
.dot{width:7px;height:7px;border-radius:50%;background:#2fd07a;
  box-shadow:0 0 0 4px rgba(47,208,122,.16)}
.hero h1{margin:34px 0 0;font-size:clamp(48px,7.4vw,104px);line-height:1.06;
  letter-spacing:-.045em;font-weight:800}
.hero h1 .line{display:block}
.hero h1 .grad{background:linear-gradient(100deg,#fff 6%,#b9b2ff 42%,#5ee7e4 78%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lede{margin:30px auto 0;max-width:640px;font-size:17.5px;line-height:1.9;color:var(--muted)}
.hero-btns{display:flex;gap:14px;justify-content:center;margin:44px 0 0;flex-wrap:wrap}
.btn{font-size:15px;font-weight:600;border-radius:13px;padding:15px 32px;
  transition:transform .35s var(--ease),box-shadow .35s,background .35s}
.btn-main{color:#0a0a12;background:linear-gradient(100deg,#b3a8ff,#5ee7e4);
  box-shadow:0 14px 42px rgba(124,108,255,.42)}
.btn-main:hover{transform:translateY(-3px);box-shadow:0 20px 54px rgba(124,108,255,.6)}
.btn-ghost{color:var(--fg);background:rgba(255,255,255,.05);
  border:1px solid var(--line);backdrop-filter:blur(12px)}
.btn-ghost:hover{background:rgba(255,255,255,.11);transform:translateY(-3px)}

.scroll-cue{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:12px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.3em;color:var(--faint)}
.scroll-cue i{display:block;width:1px;height:46px;
  background:linear-gradient(180deg,transparent,var(--c1));
  animation:cue 2.2s ease-in-out infinite}
@keyframes cue{0%{transform:scaleY(.25);transform-origin:top;opacity:0}
  45%{opacity:1}100%{transform:scaleY(1);transform-origin:top;opacity:0}}

/* 首屏入场（只在 JS 可用时隐藏，否则内容必须直接可读） */
html.js [data-hero]{opacity:0;transform:translateY(26px);
  animation:heroIn 1.1s var(--ease) forwards;animation-delay:calc(var(--i) * 110ms + 120ms)}
@keyframes heroIn{to{opacity:1;transform:none}}

/* ============================================================
   通用区块
   ============================================================ */
.section{max-width:1180px;margin:0 auto;padding:110px 40px}
.sec-head{display:flex;align-items:center;gap:22px;margin-bottom:44px}
.sec-head h2{font-family:var(--mono);font-size:12.5px;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.sec-head .rule{flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}
.sec-head em{font-family:var(--mono);font-style:normal;font-size:11.5px;color:var(--faint)}

/* 滚动显现 */
html.js [data-reveal]{opacity:0;transform:translateY(34px);filter:blur(6px);
  transition:opacity .95s var(--ease),transform .95s var(--ease),filter .95s var(--ease);
  transition-delay:calc(var(--d,0) * 110ms)}
/* 注意：这里的权重必须压过上面的 html.js [data-reveal]，不然显现不了 */
html.js [data-reveal].in{opacity:1;transform:none;filter:none}

/* ============================================================
   作品卡片
   ============================================================ */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:20px;padding:16px 16px 22px;backdrop-filter:blur(16px);
  box-shadow:0 26px 70px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .5s var(--ease),border-color .5s,box-shadow .5s;
  transform-style:preserve-3d}
.card:hover{border-color:rgba(255,255,255,.2);
  box-shadow:0 34px 90px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.1)}
/* 卡片跟随鼠标的高光 */
.card:before{content:"";position:absolute;inset:0;border-radius:20px;opacity:0;
  transition:opacity .4s;pointer-events:none;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),
             rgba(255,255,255,.11),transparent 62%)}
.card:hover:before{opacity:1}

.cover{height:176px;border-radius:13px;margin-bottom:20px;position:relative;
  overflow:hidden;border:1px solid rgba(255,255,255,.09)}
.cover:after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 42%,rgba(4,4,10,.62))}
.cover .no{position:absolute;z-index:2;right:16px;top:8px;font-size:64px;line-height:1;
  font-weight:800;letter-spacing:-.05em;color:rgba(255,255,255,.26)}
.cover b{position:absolute;z-index:2;left:16px;bottom:14px;font-family:var(--mono);
  font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.92)}
.c1{background:linear-gradient(135deg,#3b2f8f,#7c6cff 46%,#25d4d4)}
.c2{background:linear-gradient(135deg,#0e3b39,#2f8f86 50%,#9ff2e8)}
.c3{background:linear-gradient(135deg,#4a2440,#b8402a 52%,#ffb08a)}
.cover{transition:transform .7s var(--ease)}
.card:hover .cover{transform:scale(1.035)}

.card h3{font-size:18px;font-weight:650;letter-spacing:-.015em;padding:0 4px}
.card p{margin:10px 0 0;padding:0 4px;font-size:13.5px;line-height:1.75;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px;padding:0 4px}
.chips i{font-style:normal;font-family:var(--mono);font-size:10.5px;color:#cdd2e4;
  background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:7px;padding:4px 9px}
.chips.big i{font-size:11.5px;padding:6px 12px;border-radius:999px}

/* ============================================================
   粘性叙事
   ============================================================ */
.narr{max-width:1180px;margin:0 auto;padding:60px 40px 110px;
  display:grid;grid-template-columns:1fr 1.05fr;gap:80px}
.sticky{position:sticky;top:130px}
.kicker{font-family:var(--mono);font-size:11.5px;letter-spacing:.28em;
  color:#a79fff;margin-bottom:22px}
.narr h2{font-size:clamp(34px,4vw,52px);line-height:1.16;letter-spacing:-.035em;font-weight:800}
.narr h2+p{margin-top:24px;font-size:15.5px;line-height:1.95;color:var(--muted)}
.narr-right{display:flex;flex-direction:column;gap:22px;padding-top:12px}
.item{position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:18px;padding:30px 30px 32px;backdrop-filter:blur(14px);
  transition:transform .5s var(--ease),border-color .5s}
.item:hover{transform:translateX(8px);border-color:rgba(124,108,255,.45)}
.item .idx{font-family:var(--mono);font-size:11.5px;color:var(--faint);letter-spacing:.16em}
.item h4{margin:12px 0 0;font-size:20px;font-weight:650;letter-spacing:-.02em}
.item p{margin:11px 0 0;font-size:14px;line-height:1.8;color:var(--muted)}

/* ============================================================
   数字
   ============================================================ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:20px}
.stat b{display:block;font-size:clamp(38px,4.4vw,58px);font-weight:800;
  letter-spacing:-.045em;line-height:1;
  background:linear-gradient(170deg,#fff,#9fa6c8);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{display:block;margin-top:12px;font-size:13px;color:var(--muted)}

/* ============================================================
   文章
   ============================================================ */
.posts{border-top:1px solid var(--line)}
/* 注意：这里有 4 个子元素（日期 / 标题 / 简介 / 箭头），
   用 areas 显式排，别用 3 列的隐式流 —— 隐式流会把简介塞进 40px 的箭头列。 */
.post{display:grid;
  grid-template-columns:130px 1fr 40px;
  grid-template-areas:"date title arrow" "date text arrow";
  column-gap:28px;row-gap:8px;
  align-items:center;
  padding:28px 8px;border-bottom:1px solid var(--line);position:relative;
  transition:padding .45s var(--ease),background .45s}
.post .date{grid-area:date}
.post h4{grid-area:title}
.post p{grid-area:text}
.post .arrow{grid-area:arrow}
.post:hover{padding-left:22px;background:linear-gradient(90deg,rgba(124,108,255,.09),transparent)}
.post .date{font-family:var(--mono);font-size:11.5px;color:var(--faint);letter-spacing:.06em}
.post h4{font-size:19px;font-weight:600;letter-spacing:-.02em;transition:color .35s}
.post:hover h4{color:#c9c2ff}
.post p{margin:0;font-size:13.5px;line-height:1.7;color:var(--muted)}
.post .arrow{font-size:20px;color:var(--faint);justify-self:end;
  transition:transform .45s var(--ease),color .35s}
.post:hover .arrow{transform:translateX(7px);color:var(--c2)}

/* 文章占位：没有链接，就别给它 hover 反馈 */
.post.placeholder{pointer-events:none;opacity:.62}

/* ============================================================
   关于
   ============================================================ */
.about-grid{display:grid;grid-template-columns:240px 1fr;gap:60px}
.about-grid h3{font-size:26px;font-weight:750;letter-spacing:-.03em}
.about-grid p{font-size:15px;line-height:1.95;color:var(--muted);max-width:640px}
.about-grid p+p{margin-top:16px}
.about-grid .chips{margin-top:26px;padding:0}

/* ============================================================
   跑马灯
   ============================================================ */
.marquee{overflow:hidden;border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);padding:26px 0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent)}
.track{display:flex;align-items:center;gap:34px;width:max-content;
  font-size:34px;font-weight:800;letter-spacing:-.03em;color:rgba(255,255,255,.13);
  animation:slide 26s linear infinite}
.track em{color:rgba(124,108,255,.5);font-style:normal}
@keyframes slide{to{transform:translateX(-50%)}}

/* ============================================================
   页脚
   ============================================================ */
footer{position:relative;z-index:2;border-top:1px solid var(--line);
  background:rgba(4,5,9,.6);backdrop-filter:blur(14px)}
.foot-inner{max-width:1180px;margin:0 auto;padding:52px 40px 34px;
  display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.foot-inner .brand{font-size:17px}
.foot-inner .muted{margin-top:14px;line-height:1.8}
.foot-links{display:flex;gap:28px;font-size:14px;color:var(--muted);align-items:flex-start}
.foot-links a{transition:color .3s}
.foot-links a:hover{color:var(--fg)}
.foot-bottom{max-width:1180px;margin:0 auto;padding:20px 40px 40px;
  display:flex;justify-content:space-between;font-family:var(--mono);
  font-size:11.5px;color:var(--faint);border-top:1px solid var(--line)}
.foot-bottom a{color:var(--faint);transition:color .3s}
.foot-bottom a:hover{color:var(--muted)}

/* ============================================================
   静态模式（截图 / 打印 / 无动画）：把入场动画全部关掉
   ============================================================ */
html.static [data-hero],
html.static [data-reveal]{opacity:1;transform:none;filter:none;animation:none}
html.static .aurora,html.static .scroll-cue i,html.static .track{animation:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .cards{grid-template-columns:1fr 1fr}
  .narr{grid-template-columns:1fr;gap:40px}
  .sticky{position:static}
  .stats{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:720px){
  .nav{padding:14px 20px}.nav.solid{padding:10px 20px}
  .nav nav{display:none}
  .section,.narr{padding-left:22px;padding-right:22px}
  .cards{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr;gap:22px}
  .post{grid-template-columns:1fr;gap:8px}
  .post .arrow{display:none}
  .foot-inner,.foot-bottom{padding-left:22px;padding-right:22px}
  .aurora{filter:blur(80px)}
  .cursor-glow{display:none}
}

/* 尊重系统的"减少动态效果" */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;transition-duration:.001s!important}
  html{scroll-behavior:auto}
}