/* =========================================================
   江雨昕 · 个人作品集
   风格参考：onepagelove.com/pooja-jadav
   → 黑色底 + 彩色涂鸦 / 手绘感 / 强冲击力排版
   纯静态实现，无构建依赖
   ========================================================= */

/* ---------------------------------------------------------
   1. 设计变量
   --------------------------------------------------------- */
:root{
  /* 底色：黑 / 近黑分层 */
  --bg:#0B0B10;
  --bg-2:#101018;
  --bg-3:#16161F;
  --panel:#191922;
  --panel-2:#20202B;
  --line:rgba(255,255,255,.12);
  --line-2:rgba(255,255,255,.22);

  /* 文字 */
  --ink:#F6F4EF;
  --ink-2:#B9B7C4;
  --ink-3:#7E7C8C;

  /* 撞色（涂鸦色系） */
  --coral:#FF6B4A;
  --yellow:#FFD233;
  --mint:#2BD9B8;
  --violet:#8B7BFF;
  --blue:#4FB3F0;
  --pink:#FF7AA2;
  --lime:#C7F24A;

  /* 硬边投影（黑底上用浅色描边） */
  --shadow:8px 8px 0 rgba(255,255,255,.10);
  --shadow-sm:5px 5px 0 rgba(255,255,255,.10);
  --shadow-xs:3px 3px 0 rgba(255,255,255,.12);

  --radius:20px;
  --radius-sm:12px;
  --radius-lg:28px;

  --nav-h:70px;
  --wrap:1160px;

  --font-display:'Archivo','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --font-body:'Work Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;

  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-bounce:cubic-bezier(.34,1.56,.64,1);
}

/* ---------------------------------------------------------
   2. 重置与基础
   --------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 18px)}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.72;
  letter-spacing:.005em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.is-locked{overflow:hidden}
[hidden]{display:none !important}
img{max-width:100%;display:block}
svg{display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,h5,p,dl,dd,figure,ol,ul{margin:0;padding:0}
ul,ol{list-style:none}
mark{background:none;color:inherit}
table{border-collapse:collapse;width:100%}
b,strong{font-weight:700}
::selection{background:var(--yellow);color:#111}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip-link{
  position:fixed;left:16px;top:-100px;z-index:10002;
  background:var(--yellow);color:#111;font-weight:700;
  padding:10px 16px;border-radius:10px;transition:top .2s;
}
.skip-link:focus{top:14px}

/* 滚动条 */
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-track{background:#0B0B10}
::-webkit-scrollbar-thumb{background:#2A2A38;border-radius:8px;border:3px solid #0B0B10}
::-webkit-scrollbar-thumb:hover{background:#3B3B4E}

/* 顶部滚动进度 */
.progress{position:fixed;left:0;top:0;width:100%;height:3px;z-index:90;background:transparent;pointer-events:none}
.progress span{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--coral),var(--yellow) 40%,var(--mint) 70%,var(--violet));
  transition:width .1s linear;
}

/* ---------------------------------------------------------
   3. 通用组件：按钮 / 标签 / 贴纸 / 徽标
   --------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;
  font-weight:700;font-size:15px;line-height:1;
  border:2px solid var(--ink);
  background:transparent;
  transition:transform .22s var(--ease-bounce),box-shadow .22s var(--ease),background-color .22s,color .22s;
  white-space:nowrap;
}
.btn--primary{
  background:var(--yellow);color:#12121A;
  box-shadow:var(--shadow-xs);
}
.btn--primary:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(255,255,255,.16)}
.btn--ghost{
  border-color:var(--line-2);color:var(--ink);
}
.btn--ghost:hover{border-color:var(--ink);background:rgba(255,255,255,.07);transform:translate(-2px,-2px)}
.btn--sm{padding:9px 16px;font-size:13.5px}
.btn--wide{width:100%}
.btn:focus-visible,a:focus-visible,button:focus-visible,[tabindex]:focus-visible{
  outline:3px solid var(--violet);outline-offset:3px;border-radius:6px;
}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 15px;border-radius:999px;
  font-size:13px;font-weight:700;line-height:1.2;
  background:var(--yellow);color:#12121A;
  border:2px solid #12121A;
}
.chip--tilt{transform:rotate(-1.6deg)}
.chip--pink{background:var(--pink);color:#2B0B18}
.chip--yellow{background:var(--yellow);color:#12121A}
/* 可折叠经历卡片的容器与区域折叠组 */
.exp-card--collapsible{padding-bottom:22px}
.region-accordion{display:flex;flex-direction:column}

.tag{
  display:inline-block;padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1.5;
  border:1.5px solid var(--line-2);color:var(--ink-2);
}
.tag--c1{background:rgba(255,107,74,.14);border-color:rgba(255,107,74,.5);color:#FFB4A1}
.tag--c2{background:rgba(79,179,240,.14);border-color:rgba(79,179,240,.5);color:#A8DBFA}
.tag--c3{background:rgba(139,123,255,.16);border-color:rgba(139,123,255,.5);color:#C6BEFF}
.tag--c4{background:rgba(43,217,184,.14);border-color:rgba(43,217,184,.5);color:#9CF0DE}
.tag--time{border-color:var(--line-2);color:var(--ink-3);white-space:nowrap}

.tags{display:flex;flex-wrap:wrap;gap:8px}

.sticker{
  position:absolute;z-index:3;
  padding:9px 16px;border-radius:14px;
  font-weight:800;font-size:14px;
  border:2.5px solid #12121A;
  box-shadow:3px 3px 0 rgba(0,0,0,.5);
}
.sticker--mint{background:var(--mint);color:#062B23}
.sticker--violet{background:var(--violet);color:#F1EDFF}

.badge{
  padding:8px 14px;border-radius:10px;font-size:12.5px;font-weight:800;white-space:nowrap;
  border:2px dashed var(--line-2);color:var(--ink-2);
}
.badge--mock{background:rgba(255,210,51,.12);border-color:var(--yellow);color:var(--yellow)}

.hl{color:var(--yellow);font-weight:800}
.hlword{
  position:relative;display:inline-block;font-weight:800;color:var(--ink);
}
.hlword::after{
  content:'';position:absolute;left:-2px;right:-2px;bottom:1px;height:9px;z-index:-1;
  background:var(--coral);opacity:.42;border-radius:3px;transform:rotate(-.6deg);
}

/* 手绘波浪线 */
.squiggle{
  height:12px;width:180px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 12'%3E%3Cpath d='M2 7c8-8 14 8 22 0s14 8 22 0 14 8 22 0 14 8 22 0' fill='none' stroke='%23FF6B4A' stroke-width='3' stroke-linecap='round'/%3E%3C/svg%3E") repeat-x;
  background-size:120px 12px;
}

/* ---------------------------------------------------------
   4. 导航
   --------------------------------------------------------- */
.nav{
  position:fixed;left:0;top:0;width:100%;z-index:80;
  transition:background-color .28s,backdrop-filter .28s,border-color .28s;
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(11,11,16,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav__inner{height:var(--nav-h);display:flex;align-items:center;gap:20px;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand__mark{
  width:36px;height:36px;border-radius:11px;flex:none;
  display:grid;place-items:center;font-size:17px;font-weight:900;
  background:var(--coral);color:#150703;border:2px solid #12121A;
  transform:rotate(-5deg);
}
.brand__text{font-size:17px;display:flex;flex-direction:column;line-height:1.15}
.brand__text em{font-size:11px;font-style:normal;font-weight:600;color:var(--ink-3);letter-spacing:.02em}

.nav__links{display:flex;align-items:center;gap:4px}
.nav__links a{
  position:relative;padding:9px 14px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:color .2s,background-color .2s;
}
.nav__links a:hover{color:var(--ink);background:rgba(255,255,255,.06)}
.nav__links a.is-active{color:#12121A;background:var(--yellow);font-weight:700}
.nav__actions{display:flex;align-items:center;gap:10px}

.burger{display:none;width:42px;height:42px;border-radius:12px;border:2px solid var(--line-2);flex-direction:column;align-items:center;justify-content:center;gap:4px}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s,opacity .2s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------------------------------------------------------
   5. 引入界面（Splash）
   --------------------------------------------------------- */
.intro{
  position:fixed;inset:0;z-index:10000;
  background:radial-gradient(90% 70% at 50% 42%,#191926 0%,#0B0B10 62%);
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  overflow:hidden;
  transition:opacity .6s var(--ease),visibility .6s;
}
.intro::before{
  content:'';position:absolute;inset:0;
  background-image:
    radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px),
    radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);
  background-size:46px 46px,46px 46px;
  background-position:0 0,23px 23px;
  opacity:.5;pointer-events:none;
}
.intro.is-out{opacity:0;visibility:hidden}

.intro__stage{
  position:relative;flex:1;width:100%;max-width:var(--wrap);
  display:grid;place-items:end center;padding-top:calc(var(--nav-h) + 10px);
}

/* 文字置于上方独立图层，与人物完全错开：人物锚定底部，名字在上部区域 */
.intro__name{
  position:absolute;left:50%;top:24%;transform:translate(-50%,-50%);
  width:100%;text-align:center;
  font-family:var(--font-display);
  font-size:clamp(36px,9vw,132px);
  line-height:.96;font-weight:900;letter-spacing:-.02em;
  pointer-events:none;user-select:none;
}
.intro__name-hi{
  display:block;
  font-size:.32em;font-weight:700;letter-spacing:.18em;
  color:var(--ink-3);margin-bottom:.28em;
}
.intro__name b{
  color:transparent;
  -webkit-text-stroke:2px rgba(255,255,255,.55);
  text-stroke:2px rgba(255,255,255,.55);
  text-shadow:0 0 60px rgba(139,123,255,.28);
}

/* 人物 */
/* mix-blend-mode:screen 作用于整个人物按钮：视频的纯黑背景直接融入页面，
   文字/涂鸦在黑色区域自然透出（不再依赖视频 alpha，杜绝黑牙/穿模）。
   注意：z-index 会让按钮生成堆叠上下文导致混合失效，层级改由 DOM 顺序决定 */
.intro__person{
  position:relative;
  mix-blend-mode:screen;
  display:block;padding:0;
  width:min(58vw,430px);
  cursor:pointer;
  transform-origin:50% 100%;
  transition:filter .35s;
  -webkit-tap-highlight-color:transparent;
}
.intro__person img{
  width:100%;height:auto;
  filter:drop-shadow(0 26px 34px rgba(0,0,0,.62)) drop-shadow(0 0 26px rgba(139,123,255,.22));
  transition:filter .35s;
}
.intro__person:hover{transform:translateY(-6px) scale(1.02)}
.intro__person:hover img{filter:drop-shadow(0 32px 40px rgba(0,0,0,.66)) drop-shadow(0 0 40px rgba(255,210,51,.34))}
.intro__person:focus-visible{outline:3px solid var(--yellow);outline-offset:8px;border-radius:18px}

/* 点击后的三连动作：抬头 → 挥手 → 指向下方 */
.intro__person.is-greet{animation:introGreet 1.5s var(--ease) 1}
@keyframes introGreet{
  0%{transform:translateY(0) rotate(0) scale(1)}
  14%{transform:translateY(-16px) rotate(-3.4deg) scale(1.04)}
  34%{transform:translateY(-10px) rotate(2.4deg) scale(1.05)}
  52%{transform:translateY(-14px) rotate(-2deg) scale(1.045)}
  70%{transform:translateY(-8px) rotate(1.4deg) scale(1.04)}
  86%{transform:translateY(-4px) rotate(-.6deg) scale(1.02)}
  100%{transform:translateY(0) rotate(0) scale(1)}
}

/* 挥手 */
.intro__wave{
  position:absolute;right:6%;top:18%;z-index:4;
  font-size:min(9vw,58px);line-height:1;
  opacity:0;transform:scale(.5) rotate(-18deg);transform-origin:70% 80%;
}
.intro__person.is-greet .intro__wave{animation:waveHand 1.5s var(--ease-bounce) 1}
@keyframes waveHand{
  0%{opacity:0;transform:scale(.4) rotate(-14deg)}
  18%{opacity:1;transform:scale(1.06) rotate(8deg)}
  34%{transform:scale(1) rotate(-12deg)}
  50%{transform:rotate(14deg)}
  66%{transform:rotate(-10deg)}
  80%{transform:rotate(8deg)}
  100%{opacity:0;transform:scale(.94) rotate(0)}
}

/* 指向下方 */
.intro__down{
  position:absolute;left:50%;bottom:-6%;transform:translateX(-50%);
  z-index:4;font-size:min(7vw,40px);line-height:1;opacity:0;
}
.intro__person.is-greet .intro__down{animation:pointDown 1.7s var(--ease) .9s 1}
@keyframes pointDown{
  0%{opacity:0;transform:translate(-50%,-14px) scale(.7)}
  30%{opacity:1;transform:translate(-50%,0) scale(1.06)}
  55%{transform:translate(-50%,10px) scale(1)}
  75%{transform:translate(-50%,2px) scale(1.04)}
  100%{opacity:.9;transform:translate(-50%,7px) scale(1)}
}

/* 对话气泡 */
.intro__bubble{
  position:absolute;left:50%;top:-4%;transform:translate(-50%,-50%) scale(.7);
  z-index:5;opacity:0;pointer-events:none;
  padding:10px 20px;border-radius:999px;white-space:nowrap;
  background:var(--yellow);color:#12121A;
  font-weight:800;font-size:15px;border:2.5px solid #12121A;
  box-shadow:4px 4px 0 rgba(0,0,0,.45);
  transition:opacity .3s,transform .35s var(--ease-bounce);
}
.intro__person.is-greet .intro__bubble{opacity:1;transform:translate(-50%,-50%) scale(1) rotate(-2deg)}

/* 环绕涂鸦 */
.intro__ring{
  position:absolute;left:50%;top:52%;z-index:3;
  width:0;height:0;pointer-events:none;
}
.doodle{
  position:absolute;left:0;top:0;
  width:var(--s,26px);height:var(--s,26px);
  margin:calc(var(--s,26px) / -2) 0 0 calc(var(--s,26px) / -2);
  transform:translate(var(--x,0),var(--y,0)) rotate(var(--r,0deg));
  opacity:.92;
  animation:doodleFloat 5.6s var(--ease) infinite;
  animation-delay:var(--d,0s);
  filter:drop-shadow(0 0 14px rgba(255,255,255,.14));
}
.doodle svg{width:100%;height:100%;overflow:visible}
.doodle--wide{height:calc(var(--s,26px) * .42)}
@keyframes doodleFloat{
  0%,100%{transform:translate(var(--x,0),var(--y,0)) rotate(var(--r,0deg)) scale(1)}
  50%{transform:translate(var(--x,0),calc(var(--y,0) - 12px)) rotate(calc(var(--r,0deg) + 8deg)) scale(1.08)}
}

.intro__foot{
  position:relative;z-index:6;
  display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:0 24px calc(26px + env(safe-area-inset-bottom));
}
.intro__hint{
  font-size:14.5px;color:var(--ink-2);
  animation:hintPulse 2.4s ease-in-out infinite;
}
@keyframes hintPulse{0%,100%{opacity:.62}50%{opacity:1}}
.intro__enter{animation:riseIn .5s var(--ease-bounce) 1}
@keyframes riseIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.intro__skip{
  font-size:13px;color:var(--ink-3);
  border-bottom:1px dashed var(--line-2);padding-bottom:2px;
  transition:color .2s,border-color .2s;
}
.intro__skip:hover{color:var(--ink);border-color:var(--ink)}

/* ---------------------------------------------------------
   6. 首屏打招呼
   --------------------------------------------------------- */
.section,.hero{position:relative}
.hero{padding:calc(var(--nav-h) + 62px) 0 0}
.hero__grid{
  display:grid;grid-template-columns:1.12fr .88fr;
  gap:56px;align-items:center;
}
.hero__main{position:relative}
.hero__name{
  font-family:var(--font-display);
  font-size:clamp(52px,7.6vw,96px);
  line-height:1;font-weight:900;letter-spacing:-.02em;
  margin:20px 0 18px;
}
.hero__name::after{
  content:'';display:block;width:132px;height:14px;margin-top:14px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 14'%3E%3Cpath d='M3 8c8-9 15 9 23 0s15 9 23 0 15 9 23 0 15 9 23 0' fill='none' stroke='%23FFD233' stroke-width='3.4' stroke-linecap='round'/%3E%3C/svg%3E") repeat-x;
  background-size:120px 14px;
}

.hero__schoolrow{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.hero__school{font-size:15.5px;color:var(--ink-2);position:relative}
.hero__school .hlword{margin:0 2px}

/* 拉出去的备注 */
.pull-note{
  position:relative;flex:none;
  padding:8px 14px 8px 16px;border-radius:12px;
  background:var(--panel);border:2px dashed var(--line-2);
  transform:rotate(-2.5deg);
  box-shadow:var(--shadow-xs);
}
.pull-note::before{
  content:'';position:absolute;left:-13px;top:50%;width:11px;height:2px;
  background:repeating-linear-gradient(90deg,var(--line-2) 0 3px,transparent 3px 6px);
}
.pull-note b{display:block;font-size:12.5px;line-height:1.4;color:var(--ink);white-space:nowrap}
.pull-note span{display:block;font-size:11.5px;line-height:1.4;color:var(--ink-3);white-space:nowrap}

.hero__statement{
  font-size:clamp(19px,2.3vw,25px);line-height:1.62;font-weight:700;
  color:var(--ink);max-width:38em;margin-bottom:14px;
}
.hero__statement b{
  color:#12121A;background:var(--yellow);
  padding:1px 6px;border-radius:6px;
  box-decoration-break:clone;-webkit-box-decoration-break:clone;
}
.hero__desc{font-size:15.5px;color:var(--ink-2);max-width:40em}
.hero__desc b{color:var(--ink);font-weight:700;border-bottom:2px solid var(--coral);padding-bottom:1px}

.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin:30px 0 0}

.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
  margin-top:38px;padding-top:28px;border-top:1px solid var(--line);
}
.stats__item dt{font-size:12.5px;color:var(--ink-3);line-height:1.5;margin-bottom:4px}
.stats__item dd{font-size:15px;font-weight:600;color:var(--ink-2)}
.stats__item dd b{
  display:block;font-family:var(--font-display);
  font-size:clamp(24px,2.6vw,32px);font-weight:900;color:var(--yellow);line-height:1.1;
}

/* 右侧人物 */
.hero__side{display:flex;justify-content:flex-end}
.hero__figure{position:relative;width:min(88%,340px);padding-bottom:20px}
.hero__blob{
  position:absolute;left:50%;top:8%;transform:translateX(-50%);
  width:112%;aspect-ratio:1/1;border-radius:50% 44% 54% 46% / 46% 52% 48% 54%;
  background:
    radial-gradient(circle at 34% 30%,rgba(139,123,255,.66),transparent 58%),
    radial-gradient(circle at 70% 66%,rgba(255,107,74,.6),transparent 58%),
    radial-gradient(circle at 50% 88%,rgba(43,217,184,.5),transparent 60%);
  filter:blur(6px);animation:blobSpin 18s linear infinite;
}
@keyframes blobSpin{
  0%,100%{transform:translateX(-50%) rotate(0) scale(1)}
  50%{transform:translateX(-50%) rotate(180deg) scale(1.06)}
}
.hero__figure img{position:relative;z-index:2;width:100%;filter:drop-shadow(0 22px 30px rgba(0,0,0,.55))}
.hero__figure .sticker--mint{left:-6%;top:16%;transform:rotate(-7deg)}
.hero__figure .sticker--violet{right:-4%;bottom:24%;transform:rotate(6deg)}

/* 走马灯 */
.marquee{
  margin-top:66px;padding:16px 0;overflow:hidden;
  background:var(--bg-2);
  border-top:1.5px solid var(--line);border-bottom:1.5px solid var(--line);
}
.marquee__track{display:flex;gap:26px;align-items:center;white-space:nowrap;width:max-content;animation:marquee 40s linear infinite}
.marquee__track span{font-weight:800;font-size:15px;color:var(--ink-2)}
.marquee__track i{color:var(--coral);font-style:normal;font-size:11px}
.marquee__track span:nth-child(6n+3){color:var(--yellow)}
.marquee__track span:nth-child(6n+6){color:var(--mint)}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.marquee:hover .marquee__track{animation-play-state:paused}

/* ---------------------------------------------------------
   7. 章节
   --------------------------------------------------------- */
.section{padding:96px 0}
.section--tint{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--dark{
  background:
    radial-gradient(60% 80% at 12% 8%,rgba(255,107,74,.24),transparent 60%),
    radial-gradient(60% 80% at 88% 84%,rgba(139,123,255,.28),transparent 62%),
    linear-gradient(150deg,#191138,#0E1533 52%,#2A0E2E);
}

.sec-head{
  display:grid;grid-template-columns:auto 1fr auto;align-items:end;gap:20px;
  padding-bottom:20px;margin-bottom:40px;border-bottom:1px solid var(--line);
}
.sec-head__no{
  font-family:var(--font-display);font-size:44px;font-weight:900;line-height:1;
  color:transparent;-webkit-text-stroke:1.6px var(--line-2);
}
.sec-head__title{font-family:var(--font-display);font-size:clamp(28px,3.6vw,42px);font-weight:900;line-height:1.1;letter-spacing:-.01em}
.sec-head__desc{font-size:14px;color:var(--ink-3);max-width:30em;text-align:right}
/* 单行变体：桌面端不换行，窄屏恢复常规折行 */
.sec-head__desc--oneline{max-width:none;white-space:nowrap}
@media (max-width:1080px){ .sec-head__desc--oneline{white-space:normal;text-align:left} }
.sec-head--light{border-bottom-color:rgba(255,255,255,.2)}
.sec-head--light .sec-head__desc{color:rgba(255,255,255,.74)}

.block-title{
  display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;
  font-size:19px;font-weight:800;margin:52px 0 20px;
}
.block-title__sub{font-size:12.5px;font-weight:600;color:var(--ink-3)}
.sec-row{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}
.sec-row .block-title{margin-bottom:20px}

/* ---------------------------------------------------------
   8. 卡片 / 键值 / 时间轴 / 技能
   --------------------------------------------------------- */
.card{
  background:var(--panel);border:1.5px solid var(--line);
  border-radius:var(--radius);padding:26px;
  transition:transform .25s var(--ease),border-color .25s,box-shadow .25s;
}
.card--flat{padding:20px;background:var(--bg-3)}
.card--flat:hover{transform:translateY(-4px);border-color:var(--line-2)}
.card--info{border-color:var(--line-2);background:linear-gradient(140deg,var(--panel-2),var(--bg-3))}
.card__title{font-size:17px;font-weight:800;margin-bottom:18px}
.card__mini{
  font-size:12.5px;font-weight:800;letter-spacing:.06em;
  color:var(--ink-3);text-transform:uppercase;margin-bottom:12px;
}

.kv{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--line);border-radius:var(--radius-sm);overflow:hidden}
.kv--wide{grid-template-columns:repeat(3,1fr)}
.kv li{
  background:var(--panel);padding:16px 18px;
  display:flex;flex-direction:column;gap:5px;
}
.kv li span{font-size:12px;color:var(--ink-3)}
.kv li b{font-size:15.5px;font-weight:700;color:var(--ink)}

.timeline{position:relative;padding-left:26px}
.timeline::before{content:'';position:absolute;left:6px;top:8px;bottom:8px;width:2px;background:var(--line-2)}
.timeline__item{position:relative;padding-bottom:28px}
.timeline__item:last-child{padding-bottom:0}
.timeline__dot{
  position:absolute;left:-26px;top:6px;width:14px;height:14px;border-radius:50%;
  background:var(--yellow);border:2.5px solid #12121A;
}
.timeline__row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:8px}
.timeline__row h4{font-size:16px;font-weight:700;line-height:1.5}
.timeline__body p{font-size:14.5px;color:var(--ink-2);margin-bottom:10px}

.skill-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}

/* ---------------------------------------------------------
   9. 科研成果（横向滑动）
   --------------------------------------------------------- */
.papers__nav{display:flex;gap:8px}
.paper-btn{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;font-size:17px;font-weight:700;
  background:var(--panel);border:2px solid var(--line-2);color:var(--ink);
  transition:transform .2s var(--ease-bounce),background-color .2s,color .2s,opacity .2s;
}
.paper-btn:hover{background:var(--yellow);color:#12121A;transform:translate(-2px,-2px)}
.paper-btn:disabled{opacity:.3;cursor:not-allowed;transform:none;background:var(--panel);color:var(--ink)}

.papers{position:relative}
.papers__track{
  display:flex;gap:18px;overflow-x:auto;padding:4px 4px 20px;
  scroll-snap-type:x mandatory;scroll-behavior:smooth;
  scrollbar-width:none;-ms-overflow-style:none;
}
.papers__track::-webkit-scrollbar{display:none}
.papers__track:focus-visible{outline:3px solid var(--violet);outline-offset:6px;border-radius:16px}
.paper{
  flex:0 0 clamp(270px,32%,360px);scroll-snap-align:start;
  position:relative;overflow:hidden;
  background:var(--panel);border:1.5px solid var(--line);border-radius:var(--radius);
  padding:22px;display:flex;flex-direction:column;gap:10px;
  transition:transform .25s var(--ease),border-color .25s,box-shadow .25s;
}
.paper::before{content:'';position:absolute;left:0;top:0;width:100%;height:5px;background:var(--violet)}
.paper:nth-child(3n+2)::before{background:var(--blue)}
.paper:nth-child(3n+3)::before{background:var(--mint)}
.paper:hover{transform:translateY(-6px);border-color:var(--line-2);box-shadow:var(--shadow-sm)}
.paper__top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.paper__rank{
  padding:3px 10px;border-radius:7px;font-size:12px;font-weight:900;
  background:var(--violet);color:#F1EDFF;
}
.paper__rank--t4{background:var(--panel-2);color:var(--ink-2);border:1.5px solid var(--line-2)}
.paper__date{font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.paper__venue{font-size:13.5px;font-weight:800;color:var(--blue);line-height:1.45}
.paper__title{font-size:14px;line-height:1.66;color:var(--ink-2);flex:1}
.paper__authors{font-size:12.5px;color:var(--ink-3);line-height:1.6}
.paper__authors mark{color:var(--yellow);font-weight:800;background:rgba(255,210,51,.12);padding:0 3px;border-radius:4px}
.paper__note{font-size:11.5px;color:var(--ink-3);border-top:1px dashed var(--line);padding-top:9px}

.papers__dots{display:flex;gap:7px;justify-content:center;margin-top:6px}
.papers__dots i{
  width:8px;height:8px;border-radius:50%;background:var(--line-2);
  transition:background-color .2s,transform .2s;
}
.papers__dots i.is-on{background:var(--yellow);transform:scale(1.3)}

/* ---------------------------------------------------------
   10. 标签页
   --------------------------------------------------------- */
.tabs{
  display:inline-flex;gap:6px;padding:6px;margin-bottom:28px;
  background:var(--bg-3);border:1.5px solid var(--line);border-radius:999px;
  flex-wrap:wrap;
}
.tabs__btn{
  padding:11px 22px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:background-color .2s,color .2s,transform .2s;
  white-space:nowrap;
}
.tabs__btn:hover{color:var(--ink);background:rgba(255,255,255,.06)}
.tabs__btn.is-active{background:var(--ink);color:#12121A;font-weight:800}
.tabs--big .tabs__btn{padding:14px 26px;font-size:15.5px}
.tabs__k{
  display:inline-block;margin-right:8px;padding:2px 8px;border-radius:6px;
  font-size:11.5px;font-weight:900;letter-spacing:.04em;
  background:var(--panel-2);color:var(--ink-2);
}
.tabs__btn.is-active .tabs__k{background:#12121A;color:var(--yellow)}
.tabs__panel{animation:fadeUp .38s var(--ease) 1}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------------------------------------------------------
   11. 经历卡片
   --------------------------------------------------------- */
.exp-card{
  background:var(--panel);border:1.5px solid var(--line);border-radius:var(--radius);
  padding:30px;margin-bottom:20px;
  transition:border-color .25s;
}
.exp-card:hover{border-color:var(--line-2)}
.exp-card__head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:10px}
.exp-card__org{font-size:20px;font-weight:800;line-height:1.4}
.exp-card__role{font-size:14px;color:var(--coral);font-weight:700;margin-top:3px}
.exp-card__project{
  font-size:14px;color:var(--ink-2);padding:11px 15px;border-radius:var(--radius-sm);
  background:var(--bg-3);border-left:3px solid var(--blue);margin:14px 0 6px;
}
.exp-card__lede{font-size:15px;color:var(--ink-2);max-width:52em;margin:8px 0 4px}

.exp-list{display:flex;flex-direction:column;gap:2px;margin-top:18px}
.exp-item{
  display:grid;grid-template-columns:auto 1fr;gap:16px;
  padding:18px 0;border-top:1px solid var(--line);
}
.exp-item:first-child{border-top:0;padding-top:6px}
.exp-item__no{
  font-family:var(--font-display);font-size:22px;font-weight:900;line-height:1;
  color:transparent;-webkit-text-stroke:1.4px var(--line-2);
  padding-top:2px;
}
.exp-item__title{font-size:15.5px;font-weight:800;margin-bottom:6px;color:var(--yellow)}
.exp-item p{font-size:14.8px;color:var(--ink-2);line-height:1.78}
.exp-more{display:flex;flex-direction:column;margin-top:8px}

.exp-card__foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:22px;padding-top:20px;border-top:1px dashed var(--line);
}
.link-toggle{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;font-weight:700;color:var(--yellow);
  padding:8px 16px;border-radius:999px;border:1.5px solid rgba(255,210,51,.45);
  transition:background-color .2s,transform .2s;
}
.link-toggle:hover{background:rgba(255,210,51,.14);transform:translateY(-2px)}

/* ---------------------------------------------------------
   12. 校园经历
   --------------------------------------------------------- */
.campus{
  background:linear-gradient(150deg,var(--panel-2),var(--bg-3));
  border:1.5px solid var(--line-2);border-radius:var(--radius-lg);
  padding:34px;position:relative;overflow:hidden;
}
.campus::after{
  content:'DANCE';position:absolute;right:-14px;bottom:-30px;
  font-family:var(--font-display);font-size:150px;font-weight:900;line-height:1;
  color:transparent;-webkit-text-stroke:2px rgba(255,255,255,.07);
  pointer-events:none;user-select:none;
}
.campus__head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:26px}
.campus__name{font-family:var(--font-display);font-size:clamp(28px,3.4vw,40px);font-weight:900;line-height:1.15}
.campus__role{font-size:14px;color:var(--pink);font-weight:700;margin-top:6px}

.campus__stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:30px}
.cstat{
  position:relative;padding:20px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.04);border:1.5px solid var(--line);
  transition:transform .25s var(--ease-bounce),border-color .25s;
}
.cstat:hover{transform:translateY(-5px);border-color:var(--acc,var(--line-2))}
.cstat__num{
  display:block;font-family:var(--font-display);
  font-size:clamp(30px,4vw,46px);font-weight:900;line-height:1;
  color:var(--acc,var(--yellow));margin-bottom:8px;
  font-variant-numeric:tabular-nums;
}
.cstat__k{font-size:13px;color:var(--ink-2)}

.campus__what{margin-bottom:24px}
.campus__what h4{font-size:15px;font-weight:800;color:var(--ink-3);letter-spacing:.06em;margin-bottom:6px}
.campus__what p{font-size:clamp(18px,2.2vw,23px);font-weight:800;line-height:1.5}

.campus__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;position:relative;z-index:2}
.campus__item-title{font-size:16px;font-weight:800;margin:16px 0 8px;color:var(--yellow)}
.campus__item p{font-size:14.6px;color:var(--ink-2);line-height:1.78}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.campus__grid .campus__item:first-child .ph{aspect-ratio:1/1}

/* ---------------------------------------------------------
   13. 声明条
   --------------------------------------------------------- */
.notice{
  display:grid;grid-template-columns:auto 1fr;gap:16px;
  padding:20px 24px;border-radius:var(--radius);
  background:rgba(255,210,51,.09);border:1.5px dashed rgba(255,210,51,.5);
  margin-bottom:34px;
}
.notice--inline{margin:20px 0;padding:16px 20px;border-radius:var(--radius-sm)}
.notice__icon{
  width:30px;height:30px;border-radius:50%;flex:none;
  display:grid;place-items:center;font-weight:900;font-size:17px;
  background:var(--yellow);color:#12121A;
}
.notice p{font-size:14.2px;color:var(--ink-2);line-height:1.8}
.notice p b{color:var(--ink)}

/* ---------------------------------------------------------
   14. 作品
   --------------------------------------------------------- */
.work{
  position:relative;
  background:var(--panel);border:1.5px solid var(--line);border-radius:var(--radius-lg);
  padding:36px;overflow:hidden;
}
.work::before{
  content:'';position:absolute;left:0;top:0;width:100%;height:5px;
  background:linear-gradient(90deg,var(--acc),transparent);
}
.work__head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:18px}
.work__no{font-size:11.5px;font-weight:800;letter-spacing:.14em;color:var(--ink-3)}
.work__title{font-family:var(--font-display);font-size:clamp(24px,3vw,34px);font-weight:900;line-height:1.24;margin:8px 0 6px}
.work__sub{font-size:14.5px;color:var(--acc);font-weight:700}
.work__desc{font-size:15.4px;color:var(--ink-2);line-height:1.82;max-width:56em}
.work__desc b{color:var(--ink)}
.work__tags{margin-top:18px}
.work__meta{min-width:0}
.work__foot{margin-top:30px}

.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:26px}
.kpi{
  padding:20px;border-radius:var(--radius-sm);
  background:var(--bg-3);border:1.5px solid var(--line);
  transition:transform .25s var(--ease-bounce),border-color .25s;
}
.kpi:hover{transform:translateY(-4px);border-color:var(--acc,var(--line-2))}
.kpi__label{display:block;font-size:12.5px;color:var(--ink-3);line-height:1.5;margin-bottom:10px}
.kpi__value{
  display:block;font-family:var(--font-display);
  font-size:clamp(26px,3.4vw,38px);font-weight:900;line-height:1.06;color:var(--ink);
}
.kpi__value span{font-size:.5em;font-weight:700;margin-left:3px;color:var(--ink-2)}
.kpi__delta{display:inline-block;margin-top:10px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:700;background:var(--panel-2);color:var(--ink-2)}
/* 中国股市习惯：涨用红、跌用绿 */
.kpi__delta.is-up{background:rgba(255,90,60,.16);color:#FF9A80}
.kpi__delta.is-down{background:rgba(43,217,184,.16);color:#8CEBD8}
.kpis__note{font-size:12.5px;color:var(--ink-3);margin-top:12px}

.board{margin-top:30px}
.board__head{display:flex;align-items:baseline;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.board__head h4{font-size:16px;font-weight:800}
.board__hint{font-size:12.5px;color:var(--ink-3)}
.video-wrap{
  border-radius:var(--radius);overflow:hidden;
  border:2px solid var(--line-2);background:#000;box-shadow:var(--shadow-sm);
}
.video-wrap video{width:100%;display:block;aspect-ratio:16/9;background:#000}
.board__cap{font-size:12.5px;color:var(--ink-3);margin-top:12px}

.ability{margin-top:34px}
.ability__title{font-size:17px;font-weight:800;margin-bottom:18px}
.ability__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.ability__item{
  padding:20px;border-radius:var(--radius-sm);
  background:var(--bg-3);border:1.5px solid var(--line);
  transition:transform .25s var(--ease),border-color .25s;
}
.ability__item:hover{transform:translateY(-5px);border-color:var(--acc,var(--line-2))}
.ability__ico{font-size:22px;display:block;margin-bottom:10px}
.ability__item b{display:block;font-size:15px;margin-bottom:8px}
.ability__item p{font-size:13.5px;color:var(--ink-2);line-height:1.72}

/* 实验分组 */
.arms{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:26px}
.arm{
  padding:20px;border-radius:var(--radius-sm);
  background:var(--bg-3);border:1.5px solid var(--line);
  display:flex;flex-direction:column;gap:8px;
}
.arm--b{border-color:rgba(79,179,240,.55);background:rgba(79,179,240,.08)}
.arm--c{border-color:rgba(255,107,74,.55);background:rgba(255,107,74,.08)}
.arm__k{font-size:11.5px;font-weight:900;letter-spacing:.08em;color:var(--ink-3)}
.arm b{font-size:15px;line-height:1.55}
.arm small{font-size:12.5px;color:var(--ink-3);line-height:1.6}

/* 结论 */
.findings{display:flex;flex-direction:column;gap:2px;margin-top:30px}
.finding{display:grid;grid-template-columns:auto 1fr;gap:16px;padding:18px 0;border-top:1px solid var(--line)}
.finding:first-child{border-top:0}
.finding__no{
  font-family:var(--font-display);font-size:20px;font-weight:900;
  color:var(--acc,var(--yellow));line-height:1.2;
}
.finding p{font-size:14.8px;color:var(--ink-2);line-height:1.8}
.finding p b{color:var(--ink)}

/* ---------------------------------------------------------
   15. 联系我 / 页脚
   --------------------------------------------------------- */
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.contact-card{
  display:flex;flex-direction:column;gap:6px;
  padding:24px;border-radius:var(--radius);
  background:rgba(255,255,255,.055);border:1.5px solid rgba(255,255,255,.2);
  transition:transform .25s var(--ease-bounce),background-color .25s,border-color .25s;
}
.contact-card:hover{transform:translate(-3px,-3px);background:rgba(255,255,255,.1);border-color:#fff}
.contact-card--copy{cursor:pointer}
.contact-card--static{cursor:default}
.contact-card__ico{font-size:22px}
.contact-card__k{font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.6);font-weight:700}
.contact-card__v{font-size:16px;font-weight:800;word-break:break-all;line-height:1.5}
.contact-card__hint{font-size:12px;color:rgba(255,255,255,.6)}

.closing{margin-top:60px;text-align:center}
.closing__title{
  font-family:var(--font-display);
  font-size:clamp(22px,3vw,34px);font-weight:900;line-height:1.5;
}
.closing__sub{margin-top:14px;font-size:14px;color:rgba(255,255,255,.68)}

.footer{
  margin-top:56px;padding-top:26px;border-top:1px solid rgba(255,255,255,.16);
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.62);
}
.footer__note{max-width:44em;line-height:1.7}

/* ---------------------------------------------------------
   16. 详情层
   --------------------------------------------------------- */
.detail{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:24px}
.detail__backdrop{position:absolute;inset:0;background:rgba(5,5,9,.82);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);animation:fadeIn .25s ease 1}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.detail__sheet{
  position:relative;z-index:2;
  width:100%;max-width:920px;max-height:calc(100vh - 48px);
  display:flex;flex-direction:column;
  background:var(--bg-2);border:1.5px solid var(--line-2);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.6);
  animation:sheetIn .4s var(--ease) 1;
}
@keyframes sheetIn{from{opacity:0;transform:translateY(26px) scale(.97)}to{opacity:1;transform:none}}
.detail__sheet::before{
  content:'';position:absolute;left:0;top:0;width:100%;height:5px;z-index:3;
  background:linear-gradient(90deg,var(--acc),transparent);
}
.detail__head{
  display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:26px 30px 18px;border-bottom:1px solid var(--line);flex:none;
}
.detail__no{font-size:11.5px;font-weight:800;letter-spacing:.14em;color:var(--ink-3)}
.detail__title{font-family:var(--font-display);font-size:clamp(20px,2.6vw,28px);font-weight:900;line-height:1.3;margin:7px 0 5px}
.detail__sub{font-size:13px;color:var(--ink-3)}
.detail__close{
  width:40px;height:40px;flex:none;border-radius:50%;
  display:grid;place-items:center;font-size:17px;
  background:var(--panel);border:1.5px solid var(--line-2);
  transition:background-color .2s,transform .2s;
}
.detail__close:hover{background:var(--coral);color:#150703;transform:rotate(90deg)}
.detail__tabs{
  margin:0;border:0;border-radius:0;background:transparent;
  padding:14px 26px 12px;border-bottom:1px solid var(--line);
  display:flex;gap:6px;overflow-x:auto;flex:none;
  scrollbar-width:none;
}
.detail__tabs::-webkit-scrollbar{display:none}
.detail__tabs .tabs__btn{padding:9px 17px;font-size:13.8px;border:1.5px solid transparent}
.detail__tabs .tabs__btn:not(.is-active){border-color:var(--line)}
.detail__body{padding:28px 30px 40px;overflow-y:auto;overscroll-behavior:contain}

.d-block{padding-bottom:26px;margin-bottom:26px;border-bottom:1px solid var(--line)}
.d-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.d-title{font-size:16.5px;font-weight:800;margin-bottom:12px;color:var(--ink)}
.d-block p{font-size:14.8px;color:var(--ink-2);line-height:1.86}
.d-block p b{color:var(--ink)}
.d-quote{
  font-size:15.5px !important;font-weight:700;color:var(--ink) !important;
  padding:16px 20px;border-radius:var(--radius-sm);
  background:rgba(139,123,255,.12);border-left:4px solid var(--violet);
}
.d-note{font-size:12.6px !important;color:var(--ink-3) !important;margin-top:12px}

.d-list{display:flex;flex-direction:column;gap:12px}
.d-list li{position:relative;padding-left:20px;font-size:14.8px;color:var(--ink-2);line-height:1.84}
.d-list li::before{content:'';position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:2px;background:var(--acc,var(--yellow));transform:rotate(45deg)}
.d-list li b{color:var(--ink)}

.d-steps{display:flex;flex-direction:column;gap:12px;counter-reset:s}
.d-steps li{display:grid;grid-template-columns:auto 1fr;gap:3px 14px;align-items:start}
.d-steps li b{grid-column:2;display:block;font-size:14.5px;color:var(--ink);margin:0}
.d-steps li span{grid-column:2;font-size:14px;color:var(--ink-2);line-height:1.8}
.d-steps li::before{
  counter-increment:s;content:counter(s,decimal-leading-zero);
  font-family:var(--font-display);font-size:16px;font-weight:900;
  color:var(--acc,var(--yellow));padding-top:2px;
}

.table-wrap{overflow-x:auto;border-radius:var(--radius-sm);border:1.5px solid var(--line)}
.d-table{min-width:520px;font-size:13.6px}
.d-table th{
  text-align:left;padding:12px 15px;font-weight:800;font-size:12.5px;
  background:var(--panel-2);color:var(--ink);white-space:nowrap;
}
.d-table td{padding:12px 15px;color:var(--ink-2);border-top:1px solid var(--line);line-height:1.7}
.d-table td b{color:var(--ink)}

.flow{display:flex;flex-direction:column;gap:8px}
.flow__step{padding:16px 20px;border-radius:var(--radius-sm);background:var(--bg-3);border:1.5px solid var(--line)}
.flow__step--hl{border-color:var(--acc,var(--yellow));background:rgba(255,210,51,.1)}
.flow__k{display:block;font-size:11.5px;font-weight:900;letter-spacing:.1em;color:var(--ink-3);margin-bottom:6px}
.flow__step p{font-size:14.5px;color:var(--ink-2)}
.flow__arrow{text-align:center;color:var(--ink-3);font-size:15px;line-height:1}

.checklist{display:flex;flex-direction:column;gap:10px}
.checklist__row{display:grid;grid-template-columns:auto 1fr;gap:16px;padding:14px 18px;border-radius:var(--radius-sm);background:var(--bg-3);border:1.5px solid var(--line)}
.checklist__k{font-size:11.5px;font-weight:900;letter-spacing:.06em;color:#12121A;background:var(--yellow);padding:4px 10px;border-radius:999px;height:fit-content;white-space:nowrap}
.checklist__row p{font-size:14.3px;color:var(--ink-2);line-height:1.78}
.checklist__row p b{color:var(--ink)}

.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.metric{padding:20px;border-radius:var(--radius-sm);background:var(--bg-3);border:1.5px solid var(--line);display:flex;flex-direction:column;gap:8px}
.metric--north{border-color:var(--yellow);background:rgba(255,210,51,.09)}
.metric--guard{border-color:rgba(43,217,184,.5)}
.metric__k{font-size:11.5px;font-weight:900;letter-spacing:.06em;color:var(--ink-3)}
.metric b{font-size:15.5px;line-height:1.5}
.metric p{font-size:13.6px;color:var(--ink-2);line-height:1.72;flex:1}
.metric small{font-size:12.2px;color:var(--ink-3);line-height:1.6;border-top:1px dashed var(--line);padding-top:9px}

.sample{display:flex;flex-direction:column;gap:1px;background:var(--line);border-radius:var(--radius-sm);overflow:hidden;border:1.5px solid var(--line)}
.sample__row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 18px;background:var(--bg-3);font-size:14px}
.sample__row span{color:var(--ink-3)}
.sample__row b{color:var(--ink);font-weight:800;text-align:right}
.sample__row--hl{background:rgba(139,123,255,.16)}
.sample__row--hl b{color:#C6BEFF}

.risk-list{display:flex;flex-direction:column;gap:12px}
.risk{padding:18px 20px;border-radius:var(--radius-sm);background:var(--bg-3);border:1.5px solid var(--line);border-left:4px solid var(--coral)}
.risk b{display:block;font-size:15px;margin-bottom:7px}
.risk p{font-size:14.2px;color:var(--ink-2);line-height:1.8}

.acc{border:1.5px solid var(--line);border-radius:var(--radius-sm);margin-bottom:12px;background:var(--bg-3);overflow:hidden}
.acc summary{
  padding:16px 20px;cursor:pointer;list-style:none;
  font-size:14.8px;font-weight:700;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  transition:background-color .2s;
}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{content:'＋';font-size:17px;color:var(--acc,var(--yellow));flex:none;transition:transform .25s}
.acc[open] summary::after{transform:rotate(135deg)}
.acc summary:hover{background:rgba(255,255,255,.045)}
.acc__body{padding:0 20px 20px}
.acc__body p{font-size:14.2px;color:var(--ink-2);line-height:1.8;margin-bottom:14px}
.acc__pill{font-size:11.5px;font-weight:800;padding:3px 10px;border-radius:999px;background:var(--acc,var(--violet));color:#12121A}

.steps4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.steps4__item{padding:18px;border-radius:var(--radius-sm);background:var(--bg-3);border:1.5px solid var(--line)}
.steps4__item span{font-family:var(--font-display);font-size:15px;font-weight:900;color:var(--acc,var(--violet));display:block;margin-bottom:8px}
.steps4__item b{display:block;font-size:14.5px;margin-bottom:6px}
.steps4__item p{font-size:13.4px;color:var(--ink-2);line-height:1.7}

/* ---------------------------------------------------------
   17. 图片占位（把图片丢进 assets/img/ 即自动显示）
   --------------------------------------------------------- */
.ph{
  position:relative;margin:0;border:2px dashed var(--line-2);border-radius:var(--radius-sm);
  overflow:hidden;background:var(--bg-3);
}
/* 图片默认直接显示；占位提示框默认隐藏，仅当 JS 检测到加载失败才显示。
   这样即使 JS 被缓存/拦截，照片也一定可见。 */
.ph__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.ph.is-broken .ph__img{display:none}
.ph.is-broken .ph__ph{display:flex}
.ph__ph{
  position:absolute;inset:0;
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  text-align:center;padding:14px;
}
.ph__icon{font-size:24px;opacity:.5}
.ph__ph strong{font-size:14px;color:var(--ink-2)}
.ph__ph code{
  font-size:11.5px;color:var(--yellow);background:rgba(255,210,51,.1);
  padding:3px 8px;border-radius:6px;word-break:break-all;
}
.ph__ph small{font-size:11.5px;color:var(--ink-3);max-width:34em;line-height:1.6}

/* ---------------------------------------------------------
   18. 工具元素
   --------------------------------------------------------- */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;font-size:18px;font-weight:800;
  background:var(--yellow);color:#12121A;border:2px solid #12121A;
  box-shadow:3px 3px 0 rgba(255,255,255,.16);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .3s,transform .3s,visibility .3s;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{transform:translate(-2px,-2px)}

.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,16px);
  z-index:10001;padding:12px 22px;border-radius:999px;
  background:var(--ink);color:#12121A;font-size:14px;font-weight:700;
  opacity:0;transition:opacity .28s,transform .28s;pointer-events:none;
  box-shadow:0 10px 28px rgba(0,0,0,.5);max-width:88vw;text-align:center;
}
.toast.is-show{opacity:1;transform:translate(-50%,0)}

/* ---------------------------------------------------------
   19. 滚动入场
   --------------------------------------------------------- */
html.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
html.js .reveal.is-in{opacity:1;transform:none}

/* ---------------------------------------------------------
   20. 响应式
   --------------------------------------------------------- */
@media (max-width:1080px){
  .hero__grid{grid-template-columns:1fr;gap:44px}
  .hero__side{order:-1}
  .hero__figure{width:min(62%,300px)}
  .ability__grid,.skill-grid,.metric-grid,.steps4{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .campus__grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(3,1fr)}
}

@media (max-width:860px){
  :root{--nav-h:62px}
  .nav__links{
    position:fixed;left:16px;right:16px;top:calc(var(--nav-h) + 8px);
    flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(16,16,24,.97);border:1.5px solid var(--line-2);
    border-radius:var(--radius);padding:10px;
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    box-shadow:0 20px 50px rgba(0,0,0,.55);
    opacity:0;visibility:hidden;transform:translateY(-12px);
    transition:opacity .25s,transform .25s,visibility .25s;
  }
  .nav__links.is-open{opacity:1;visibility:visible;transform:none}
  .nav__links a{padding:13px 16px;font-size:15.5px;border-radius:12px}
  .burger{display:flex}
  .nav__actions .btn--ghost{display:none}
  .brand__text em{display:none}

  .section{padding:70px 0}
  .hero{padding-top:calc(var(--nav-h) + 34px)}
  .sec-head{grid-template-columns:auto 1fr;align-items:center;gap:14px}
  .sec-head__no{font-size:32px}
  .sec-head__desc{grid-column:1 / -1;text-align:left}
  .stats{grid-template-columns:repeat(2,1fr)}
  .kv,.kv--wide{grid-template-columns:repeat(2,1fr)}
  .ability__grid,.metric-grid,.steps4,.arms,.campus__stats{grid-template-columns:1fr}
  .kpis{grid-template-columns:1fr}
  .exp-card,.work,.campus{padding:24px}
  .detail{padding:0}
  .detail__sheet{max-width:100%;max-height:100%;height:100%;border-radius:0;border:0}
  .detail__body{padding:22px 20px 40px}
  .detail__head{padding:20px 20px 14px}
  .detail__tabs{padding:12px 16px 10px}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .campus__grid .campus__item:first-child .gallery .ph:last-child{display:none}
  .contact-grid{grid-template-columns:1fr}
  .footer{flex-direction:column}
  .wrap{padding:0 18px}
}

@media (max-width:640px){
  body{font-size:15.5px}
  .hero__name{font-size:clamp(44px,15vw,64px)}
  .intro__person{width:min(74vw,340px)}
  .intro__name{top:40%}
  .doodle{opacity:.8}
  .stats{grid-template-columns:1fr 1fr;gap:10px}
  .kv li{padding:13px 14px}
  .paper{flex:0 0 84%}
  .tabs{width:100%;justify-content:flex-start}
  .tabs--big{flex-direction:column;border-radius:var(--radius)}
  .tabs--big .tabs__btn{text-align:left}
  .exp-item,.finding,.checklist__row{grid-template-columns:1fr;gap:8px}
  .exp-item__no{font-size:18px}
  .work__head{flex-direction:column-reverse;align-items:flex-start}
  .gallery{grid-template-columns:1fr 1fr}
  .to-top{right:14px;bottom:14px}
}

/* ---------------------------------------------------------
   21. 无障碍 / 动效偏好 / 打印
   --------------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html.js .reveal{opacity:1;transform:none}
}

@media print{
  .nav,.progress,.to-top,.marquee,.toast,.intro{display:none !important}
  body{background:#fff;color:#111}
  .section{padding:20px 0;break-inside:avoid}
}

/* 未启用 JS 时：隐藏引入界面，保证内容可读 */
html:not(.js) .intro{display:none !important}
html:not(.js) body.is-locked{overflow:auto !important}

/* ---------------------------------------------------------
   22. 引入界面：双视频人物（默认状态 / 打招呼）
   --------------------------------------------------------- */
/* 黑底 mp4 直接铺在黑背景上：object-fit:cover 裁掉两侧纯黑区域，
   黑背景与页面黑底融为一体（混合在 .intro__person 上做），彻底告别 alpha 通道问题（不再黑牙） */
.intro__person{aspect-ratio:720 / 680}
.intro__person .intro__video{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;object-position:39% 50%;
  transition:opacity .16s linear;
  pointer-events:none;
}
.intro__person .intro__video--greet{opacity:0}
/* 视频就绪前用静态首帧图即时呈现人物（首屏零等待）；
   视频真正开播后淡出图片，无缝接管。视频解码失败则保留图片，人物永不消失 */
.intro__person .intro__still{opacity:1;transition:opacity .3s linear}
.intro__person.is-live .intro__still{opacity:0}
.intro__person.is-greet .intro__video--greet{opacity:1}
/* 打招呼视频真正开始播放后才隐藏默认状态，避免素材未就绪时人物消失 */
.intro__person.is-playing-greet .intro__video--default{opacity:0}
/* 真实视频已呈现抬头/挥手/指向，去掉叠加的整体位移动画 */
.intro__person.is-greet{animation:none}
/* 视频不可用时的兜底：仍用 CSS 动作动画给出反馈 */
.intro__person.is-greet-fallback{animation:introGreet 1.5s var(--ease) 1}
.intro__person.is-greet .intro__bubble{animation:bubblePop .45s var(--ease-bounce) both}
@keyframes bubblePop{
  from{opacity:0;transform:translate(-50%,-50%) scale(.7)}
  to{opacity:1;transform:translate(-50%,-50%) scale(1) rotate(-2deg)}
}

/* ---------------------------------------------------------
   23. 首屏照片书（叠放 + 自动翻页）
   --------------------------------------------------------- */
.book{
  position:relative;z-index:2;
  width:100%;aspect-ratio:3 / 4;
  cursor:pointer;
  -webkit-tap-highlight-color:transparent;
}
.book .book__card{
  position:absolute;left:0;top:0;width:100%;height:100%;
  object-fit:cover;border-radius:18px;
  border:3px solid rgba(255,255,255,.92);
  background:var(--bg-3);
  box-shadow:0 20px 38px rgba(0,0,0,.55);
  transform-origin:24% 100%;
  transition:transform .62s cubic-bezier(.22,1,.36,1),opacity .42s linear;
  backface-visibility:hidden;
}
.book .book__card[data-pos="0"]{transform:translate(0,0) rotate(0) scale(1);z-index:5;opacity:1}
.book .book__card[data-pos="1"]{transform:translate(-14px,12px) rotate(-3.2deg) scale(.965);z-index:4;opacity:1}
.book .book__card[data-pos="2"]{transform:translate(-28px,24px) rotate(-6.4deg) scale(.93);z-index:3;opacity:1}
.book .book__card[data-pos="3"]{transform:translate(-42px,36px) rotate(-9.6deg) scale(.895);z-index:2;opacity:1}
.book .book__card.is-fly{
  transform:translate(-62%,6%) rotate(-17deg) scale(.94);
  opacity:0;z-index:6;
}
.book .book__card.is-snap{transition:none !important}
.book__hint{
  position:absolute;left:50%;bottom:-34px;transform:translateX(-50%);
  font-size:12px;color:var(--ink-3);white-space:nowrap;pointer-events:none;
}

/* ---------------------------------------------------------
   24. 首页备注虚线箭头（SVG，由 JS 按实际位置绘制）
   --------------------------------------------------------- */
.note-arrow{
  position:absolute;inset:0;width:100%;height:100%;
  overflow:visible;pointer-events:none;z-index:1;
}
.note-arrow path{
  fill:none;stroke:var(--yellow);stroke-width:2;
  stroke-dasharray:7 7;stroke-linecap:round;
  animation:arrowDash 1.6s linear infinite;
}
@keyframes arrowDash{to{stroke-dashoffset:-28}}
.note-arrow .note-arrow__head{fill:var(--yellow);stroke:none}
@media (max-width:900px){ .note-arrow{display:none} }
/* 桌面端给箭头留出向下的弧线空间 */
@media (min-width:901px){ .hero__schoolrow{margin-bottom:44px} }

/* ---------------------------------------------------------
   25. 作品展示：并列双卡
   --------------------------------------------------------- */
.works-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:30px;
}
.works-grid .work{display:flex;flex-direction:column}
.works-grid .work__foot{margin-top:auto;padding-top:26px}
.btn--wide{width:100%;justify-content:center}

/* ---------------------------------------------------------
   26. 详情层新增：编号标题 / 分支流程 / 统计框 / 折叠详细内容
   --------------------------------------------------------- */
.d-no{
  display:inline-grid;place-items:center;
  min-width:30px;height:23px;padding:0 7px;margin-right:10px;
  border-radius:7px;background:var(--acc,var(--yellow));color:#12121A;
  font-family:var(--font-display);font-size:12.5px;font-weight:900;
  letter-spacing:.02em;vertical-align:2px;
}
.d-block--tail{border-bottom:0;margin-bottom:0;padding-bottom:0}
.d-more{
  margin-top:28px;padding-top:28px;
  border-top:1px dashed var(--line-2);
  animation:dMoreIn .4s var(--ease) 1;
}
@keyframes dMoreIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

.d-branch{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.d-branch__card{
  padding:20px 18px;border-radius:var(--radius-sm);
  background:var(--bg-3);border:1.5px solid var(--line);
  text-align:center;transition:transform .25s var(--ease),border-color .25s;
}
.d-branch__card:hover{transform:translateY(-4px);border-color:var(--acc,var(--line-2))}
.d-branch__card--alt{background:var(--bg-3)}
.d-branch__num{
  display:block;font-family:var(--font-display);
  font-size:clamp(30px,4.2vw,46px);font-weight:900;line-height:1;
  color:var(--acc,var(--yellow));
}
.d-branch__card--alt .d-branch__num{color:var(--ink-2)}
.d-branch__k{display:block;margin:9px 0 6px;font-size:13.5px;font-weight:800;color:var(--ink)}
.d-branch__card p{font-size:13.2px;color:var(--ink-2);line-height:1.7}
.d-branch__card p b{color:var(--ink)}

.stat-callout{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:18px 22px;border-radius:var(--radius-sm);
  background:rgba(139,123,255,.12);border:1.5px solid rgba(139,123,255,.5);
}
.stat-callout__k{display:block;font-size:12px;font-weight:800;letter-spacing:.06em;color:var(--ink-3);margin-bottom:7px}
.stat-callout__main b{
  font-family:var(--font-display);
  font-size:clamp(24px,3vw,33px);font-weight:900;color:var(--ink);line-height:1.1;
}
.stat-callout__meta{
  display:flex;flex-direction:column;gap:5px;align-items:flex-end;
  font-size:13px;color:var(--ink-2);
}
.stat-callout__tag{
  padding:3px 10px;border-radius:999px;font-size:11.8px;font-weight:800;
  background:rgba(255,107,74,.18);color:#FF9A80;
}

@media (max-width:1080px){
  .works-grid{grid-template-columns:1fr;gap:18px}
}
@media (max-width:640px){
  .d-branch{grid-template-columns:1fr}
  .stat-callout__meta{align-items:flex-start;text-align:left}
  .book .book__card[data-pos="1"]{transform:translate(-10px,9px) rotate(-3.2deg) scale(.965)}
  .book .book__card[data-pos="2"]{transform:translate(-20px,18px) rotate(-6.4deg) scale(.93)}
  .book .book__card[data-pos="3"]{transform:translate(-30px,27px) rotate(-9.6deg) scale(.895)}
}


/* ---------------------------------------------------------
   23. 作品B详情：双栏要点 / 公式框 / 表格滚动 / 组间差异
   --------------------------------------------------------- */
.fact-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:12px;
}
.fact-grid__item{
  padding:16px 20px;border-radius:var(--radius-sm);
  background:var(--bg-3);border:1.5px solid var(--line);
}
.fact-grid__item .fact-grid__k{
  display:block;font-size:11.5px;font-weight:900;letter-spacing:.1em;
  color:var(--acc,var(--yellow));margin-bottom:8px;
}
.fact-grid__item p{font-size:14px;color:var(--ink-2);line-height:1.85;margin:0}
@media (max-width:760px){ .fact-grid{grid-template-columns:1fr} }

.d-formula{
  display:flex;align-items:center;justify-content:center;
  padding:20px 18px;border-radius:var(--radius-sm);
  background:rgba(139,123,255,.10);border:1.5px dashed rgba(139,123,255,.55);
}
.d-formula__eq{
  font-family:'Cambria Math','STIX Two Math',Georgia,'Times New Roman',serif;
  font-size:19px;color:var(--ink);letter-spacing:.02em;white-space:nowrap;
}
.d-formula__eq sub{font-size:.62em;color:var(--ink-2)}
@media (max-width:560px){ .d-formula__eq{font-size:15px} }

.table-scroll{overflow-x:auto;margin-top:10px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--panel)}
.stat-callout__side{font-size:13.5px;color:var(--ink-2);line-height:1.75;text-align:right}

/* ---------------------------------------------------------
   24. 作品B详情：指标大字号 / 灰色决策原则 / 假设分组竖排
   --------------------------------------------------------- */
/* 关键指标：三个指标名比正文更大、加粗 */
.metric-flow .flow__k{
  font-size:18px;font-weight:900;letter-spacing:.01em;
  color:var(--ink);margin-bottom:10px;
}
.metric-flow .flow__step p{font-size:14.2px}

/* 指标决策原则：取消加粗、灰色弱化 */
.d-quote--muted{
  font-weight:400;color:var(--ink-2) !important;
  background:var(--panel);border-left-color:var(--line-2);
}
.d-quote--muted b{font-weight:400;color:inherit}

/* 实验假设：三个分组竖排，卡片紧凑化 */
.d-branch--stack{grid-template-columns:1fr;gap:10px}
.d-branch--stack .d-branch__card{
  display:grid;grid-template-columns:auto 1fr;align-items:baseline;
  column-gap:14px;row-gap:5px;
  padding:13px 18px;text-align:left;
}
.d-branch--stack .d-branch__num{font-size:22px}
.d-branch--stack .d-branch__k{
  justify-self:start;margin:0;font-size:14px;
  padding:2px 12px;border-radius:999px;
  background:rgba(255,210,51,.13);color:var(--yellow);
  border:1px solid rgba(255,210,51,.42);
}
.d-branch--stack .d-branch__card p{grid-column:2;margin:0;font-size:13.2px}