/* ============================================================
   经管系团总支学生会 · 招新页 (深色 · 仿宋 · 一镜到底)
   ============================================================ */
:root{
  --bg:#0a0d12;
  --bg2:#0e121a;
  --card:#121722;
  --card2:#161c28;
  --line:rgba(233,230,221,.09);
  --ink:#ece9e1;
  --muted:rgba(233,230,221,.56);
  --faint:rgba(233,230,221,.34);
  --gold:#c8a15c;
  --gold-soft:#e3c58b;
  --ember:#c96a4a;
  --serif:"方正仿宋_GBK","方正仿宋","FangSong","FangSong_GB2312","STFangsong","仿宋","Noto Serif SC","Songti SC",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Segoe UI",sans-serif;
  --ease:cubic-bezier(.22,.61,.21,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--serif);
  line-height:1.9;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
b{font-weight:700}

/* 烟花画布 */
#fx{position:fixed;inset:0;z-index:800;pointer-events:none}

/* ---------- 顶栏 ---------- */
.topbar{
  position:fixed;inset:0 0 auto 0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px clamp(20px,5vw,60px);
  background:rgba(10,13,18,.6);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:border-color .4s;
}
.topbar.scrolled{border-bottom-color:var(--line)}
.brand{letter-spacing:.2em;font-size:14.5px;font-weight:700}
.brand i{font-style:normal;color:var(--gold);margin-left:6px;letter-spacing:.1em}
.nav{display:flex;gap:clamp(12px,2.4vw,28px);align-items:center;font-size:13.5px;letter-spacing:.18em;color:var(--muted)}
.nav a:not(.nav-cta){position:relative;transition:color .25s}
.nav a:not(.nav-cta):hover{color:var(--ink)}
.nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:-5px;width:0;height:1px;background:var(--gold);transition:width .3s var(--ease)}
.nav a:not(.nav-cta):hover::after{width:100%}
.nav-cta{color:#0b0d11;background:var(--gold);padding:7px 18px;border-radius:99px;letter-spacing:.22em;font-weight:700;transition:background .3s,transform .3s}
.nav-cta:hover{background:var(--gold-soft);transform:translateY(-1px)}
@media(max-width:720px){.nav a:not(.nav-cta){display:none}}

/* ---------- 板块一 HERO ---------- */
.hero{min-height:100svh;display:flex;align-items:center;justify-content:center;text-align:center;
  position:relative;overflow:hidden;padding:120px 22px 90px;background:var(--bg)}
.hero-bg{position:absolute;inset:0}
.bg-layer{position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;transition:opacity 1.8s var(--ease);filter:saturate(.82) brightness(.86)}
.bg-layer.on{opacity:.5}
.hero::before{content:"";position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(720px 460px at 50% 18%,rgba(200,161,92,.12),transparent 65%),
    linear-gradient(rgba(10,13,18,.25),rgba(10,13,18,.72) 78%,var(--bg));}
.hero-inner{position:relative;z-index:2;max-width:860px}
.hero-eyebrow{font-size:clamp(11px,1.5vw,13px);letter-spacing:.5em;text-indent:.5em;color:var(--gold-soft);margin-bottom:28px}
.hero-title{font-weight:700;font-size:clamp(40px,7.6vw,84px);line-height:1.4;letter-spacing:.12em;text-shadow:0 6px 40px rgba(0,0,0,.5)}
.hero-sub{margin:30px auto 0;color:var(--muted);font-size:clamp(14px,2vw,17px);line-height:2.35;letter-spacing:.1em;max-width:640px}
.hero-sub b{color:var(--gold-soft);font-weight:700}
.hero-actions{margin-top:44px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 34px;border-radius:99px;font-size:14px;letter-spacing:.3em;text-indent:.3em;transition:all .35s var(--ease)}
.btn-solid{background:var(--gold);color:#0b0d11;font-weight:700}
.btn-solid:hover{background:var(--gold-soft);transform:translateY(-2px);box-shadow:0 14px 34px -12px rgba(200,161,92,.5)}
.btn-ghost{border:1px solid rgba(233,230,221,.35);color:var(--ink)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-soft)}
.hero-scroll{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);z-index:2;width:1px;height:52px;
  background:linear-gradient(rgba(233,230,221,.5),transparent)}

/* ---------- 通用 section ---------- */
.sec{padding:clamp(90px,13vh,150px) clamp(22px,5vw,60px)}
.sec-alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:clamp(40px,6vh,64px)}
.eyebrow{font-size:11.5px;letter-spacing:.5em;color:var(--gold);margin-bottom:16px;display:flex;align-items:center;gap:14px}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--gold);flex:none}
.sec-head h2{font-size:clamp(28px,4.4vw,46px);font-weight:700;letter-spacing:.14em}
.sec-note{margin-top:12px;color:var(--muted);font-size:13px;letter-spacing:.22em}

/* ---------- 板块二 领航 ---------- */
.leaders{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(16px,2.6vw,30px);max-width:1080px;margin:0 auto}
@media(max-width:860px){.leaders{grid-template-columns:1fr}}
.leader{
  display:flex;gap:clamp(24px,3.4vw,38px);align-items:stretch;
  background:linear-gradient(160deg,var(--card),var(--bg2));
  border:1px solid var(--line);border-radius:22px;padding:clamp(24px,3vw,34px);
  position:relative;overflow:hidden;transition:transform .5s var(--ease),border-color .4s,box-shadow .5s var(--ease);
}
.leader::after{content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(233,230,221,.05),transparent);
  transition:left 1s var(--ease);pointer-events:none}
.leader:hover{transform:translateY(-5px);border-color:rgba(200,161,92,.35);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.8),0 0 0 1px rgba(200,161,92,.08)}
.leader:hover::after{left:130%}
.l-photo{flex:none;width:clamp(168px,20vw,230px);border-radius:16px;overflow:hidden;position:relative;
  aspect-ratio:3/3.7;border:1px solid var(--line);box-shadow:0 18px 44px -22px rgba(0,0,0,.7)}
.l-photo img{width:100%;height:100%;object-fit:cover;object-position:center 22%;transition:transform .8s var(--ease)}
.leader:hover .l-photo img{transform:scale(1.05)}
.l-photo-missing{background:repeating-linear-gradient(45deg,rgba(200,161,92,.05) 0 12px,rgba(200,161,92,.11) 12px 24px);
  display:flex;align-items:center;justify-content:center}
.ph-missing{text-align:center;color:var(--faint);letter-spacing:.4em;font-size:13px;line-height:2.4}
.l-body{display:flex;flex-direction:column;justify-content:center;min-width:0}
.l-role{display:inline-block;align-self:flex-start;font-size:11px;letter-spacing:.42em;text-indent:.42em;
  color:var(--gold);border:1px solid rgba(200,161,92,.45);border-radius:99px;padding:3px 14px;margin-bottom:16px}
.l-name{font-size:clamp(24px,3vw,32px);font-weight:700;letter-spacing:.3em;margin-bottom:14px}
.l-quote{color:var(--muted);font-size:clamp(13px,1.7vw,15.5px);line-height:2.1;margin-bottom:18px;font-style:normal}
.l-tel{font-size:13.5px;letter-spacing:.1em;color:var(--gold-soft)}
@media(max-width:480px){.leader{flex-direction:column;text-align:center}
  .l-photo{align-self:center;width:150px}.l-role{align-self:center}}

/* ---------- 板块三 部门 ---------- */
.depts{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,1.8vw,22px);max-width:1200px;margin:0 auto}
@media(max-width:1024px){.depts{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.depts{grid-template-columns:1fr}}
.dept{
  background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:clamp(20px,2.4vw,26px);display:flex;flex-direction:column;gap:14px;
  transition:transform .45s var(--ease),border-color .35s,background .4s;
}
.dept:hover{transform:translateY(-4px);border-color:rgba(200,161,92,.32);background:var(--card2)}
.dept-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.dept-top h3{font-size:clamp(19px,2vw,23px);font-weight:700;letter-spacing:.3em}
.tag{font-family:var(--sans);font-size:10px;letter-spacing:.18em;color:var(--gold);
  border:1px solid rgba(200,161,92,.5);border-radius:99px;padding:2px 10px;white-space:nowrap;font-weight:600}
.tag-red{color:#e08d6d;border-color:rgba(224,141,109,.55)}
.tag-outline{color:var(--faint);border-color:var(--line)}
.dept-desc{color:var(--muted);font-size:13.5px;line-height:2;min-height:0}
.dept-want{color:var(--muted);font-size:12.5px;line-height:1.9;border-left:2px solid rgba(200,161,92,.4);padding-left:10px}
.dept-person{margin-top:auto;display:flex;gap:14px;align-items:center;border-top:1px dashed var(--line);padding-top:16px}
.dept-person img{width:74px;height:100px;object-fit:cover;object-position:center 20%;border-radius:12px;flex:none;border:1px solid var(--line);box-shadow:0 10px 26px -14px rgba(0,0,0,.8)}
.dp-info{min-width:0;font-size:13.5px;line-height:2.1;color:var(--ink)}
.dp-info b{color:var(--gold);font-weight:700;letter-spacing:.1em;margin-right:2px}
.tel{color:var(--ink);border-bottom:1px dotted rgba(233,230,221,.35);transition:color .25s}
.tel:hover{color:var(--gold-soft)}
.wx{color:var(--faint);font-size:11px}
.dp-staff{color:var(--muted);font-size:11.5px}
.dept-ghost{border-style:dashed;background:transparent;justify-content:center}
.dept-ghost:hover{border-color:rgba(200,161,92,.4);background:rgba(200,161,92,.03);transform:none}
.dept-ghost .dept-desc,.dept-ghost .dept-want{text-align:center}

/* ---------- 板块四 光影 ---------- */
.lifes{columns:3;column-gap:16px;max-width:1200px;margin:0 auto}
@media(max-width:960px){.lifes{columns:2}}
@media(max-width:560px){.lifes{columns:1}}
.lf{break-inside:avoid;margin-bottom:16px;border-radius:14px;overflow:hidden;
  position:relative;cursor:zoom-in;background:#05070b;border:1px solid var(--line)}
.lf img{width:100%;transition:transform .9s var(--ease),opacity .5s;opacity:.92}
.lf:hover img{transform:scale(1.04);opacity:1}
.lf figcaption{position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:38px 16px 13px;font-size:12px;letter-spacing:.12em;color:rgba(236,233,225,.92);
  background:linear-gradient(transparent,rgba(3,4,6,.82))}
.lf.wide{column-span:all}

/* ---------- 板块五 加入 ---------- */
.sec-final{background:
  radial-gradient(720px 380px at 50% -4%,rgba(200,161,92,.13),transparent 66%),
  radial-gradient(560px 340px at 85% 110%,rgba(201,106,74,.1),transparent 60%),
  var(--bg);
  position:relative;overflow:hidden}
.final-inner{max-width:820px;margin:0 auto;text-align:center;display:flex;flex-direction:column;align-items:center}
.final-eyebrow{font-size:11.5px;letter-spacing:.6em;text-indent:.6em;color:var(--gold);margin-bottom:20px}
.final-title{font-size:clamp(30px,5vw,52px);font-weight:700;letter-spacing:.16em;margin-bottom:18px}
.final-lead{color:var(--muted);font-size:clamp(13.5px,1.9vw,16px);line-height:2.3;letter-spacing:.1em;margin-bottom:36px}
.final-qr{background:#f4f1e9;padding:14px;border-radius:18px;box-shadow:0 34px 80px -30px rgba(0,0,0,.8)}
.final-qr img{width:min(200px,54vw);height:auto;display:block;border-radius:8px}
.qr-caption{margin-top:12px;font-size:11px;letter-spacing:.34em;text-indent:.34em;color:rgba(10,13,18,.55)}
.final-group{margin-top:26px;display:flex;flex-direction:column;align-items:center}
.g-copy{display:inline-flex;align-items:center;justify-content:center;
  border:1.5px solid rgba(200,161,92,.55);border-radius:999px;background:rgba(200,161,92,.06);
  cursor:pointer;font-family:inherit;padding:10px 52px;min-width:min(320px,82vw);
  transition:all .35s var(--ease)}
.g-copy:hover{border-color:var(--gold);background:rgba(200,161,92,.14);transform:translateY(-2px)}
.g-num{font-size:clamp(26px,4.2vw,38px);font-weight:700;letter-spacing:.18em;text-indent:.18em;color:var(--gold-soft);line-height:1.3}
.g-copy:hover .g-num{color:#f0d9a8}
.g-copy.copied{border-color:rgba(126,166,96,.7);background:rgba(126,166,96,.14)}
.g-copy.copied .g-num{color:#a8cf85}
.g-hint{margin-top:12px;font-size:11.5px;letter-spacing:.4em;text-indent:.4em;color:var(--faint)}
.g-copy:hover ~ .g-hint,.g-copy.copied ~ .g-hint{color:var(--muted)}
.final-hint{margin-top:24px;font-size:12px;letter-spacing:.5em;text-indent:.5em;color:rgba(233,230,221,.3)}

/* ---------- footer ---------- */
.footer{text-align:center;padding:38px 20px 54px;border-top:1px solid var(--line);
  color:var(--faint);font-size:12.5px;letter-spacing:.3em;line-height:2.4}
.foot-sub{color:rgba(233,230,221,.28);font-size:11px;letter-spacing:.2em}
.foot-soft{color:rgba(200,161,92,.45);font-size:11.5px;letter-spacing:.4em;margin-top:8px}

/* ---------- 灯箱 ---------- */
.lightbox{position:fixed;inset:0;z-index:900;background:rgba(4,5,8,.92);backdrop-filter:blur(8px);
  display:flex;flex-direction:column;align-items:center;justify-content:center;padding:5vh 4vw}
.lightbox[hidden]{display:none}
.lightbox img{max-width:90vw;max-height:78vh;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.6)}
.lb-cap{margin-top:16px;color:var(--muted);font-size:12.5px;letter-spacing:.2em}
.lb-close{position:absolute;top:20px;right:28px;background:none;border:none;color:#fff;font-size:38px;line-height:1;cursor:pointer;opacity:.7}
.lb-close:hover{opacity:1}

/* ---------- 入场动画 ---------- */
.js .reveal{opacity:0;transform:translateY(30px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* 部门卡: 官方职责列表 + 寄语引用 */
.dept-duties{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.dept-duties li{position:relative;padding-left:15px;font-size:13px;line-height:1.85;color:var(--muted)}
.dept-duties li::before{content:"·";position:absolute;left:1px;top:0;color:var(--gold);font-weight:700}
.dept-quote{margin:0;font-style:normal;font-size:12.5px;line-height:2.05;
  color:rgba(233,230,221,.68);border-left:2px solid rgba(200,161,92,.38);
  padding:2px 0 2px 12px;letter-spacing:.02em}
.dept-quote + .dept-quote{margin-top:4px}

/* 部长照片角标 */
.dept-person .ph{position:relative;flex:none;line-height:0;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);box-shadow:0 10px 26px -14px rgba(0,0,0,.8)}
.dept-person .ph img{width:74px;height:100px;object-fit:cover;object-position:center 20%;border:none;box-shadow:none;border-radius:0}
.ph i{position:absolute;left:0;right:0;bottom:0;font-style:normal;text-align:center;
  font-size:10px;letter-spacing:.42em;text-indent:.42em;color:#efe9de;
  background:linear-gradient(transparent,rgba(5,6,9,.78));padding:22px 0 5px;font-family:var(--sans);font-weight:600}

/* 加入QQ群 · 大按钮 */
.final-group{margin-top:30px}
.join-qq{
  display:inline-flex;flex-direction:column;align-items:center;gap:2px;
  background:linear-gradient(135deg,#e3b96e,#c8a15c 55%,#b08a45);
  border:none;border-radius:18px;cursor:pointer;font-family:inherit;
  padding:16px 52px;min-width:min(330px,84vw);
  box-shadow:0 18px 44px -18px rgba(200,161,92,.55);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s;
}
.join-qq:hover{transform:translateY(-3px);filter:brightness(1.06);
  box-shadow:0 26px 56px -18px rgba(200,161,92,.7)}
.join-qq:active{transform:translateY(0)}
.jq-title{font-size:clamp(18px,2.6vw,24px);font-weight:700;letter-spacing:.34em;text-indent:.34em;color:#191205;line-height:1.4}
.jq-sub{font-size:11.5px;letter-spacing:.2em;color:rgba(25,18,5,.62);font-weight:600}

.join-qq{text-decoration:none;color:inherit}

/* 移动端/微信: 去掉点击高亮与焦点蓝框 (保留键盘 :focus-visible 可访问性) */
*{-webkit-tap-highlight-color:transparent}
a:focus,button:focus,.join-qq:focus,.g-copy:focus{outline:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:2px}