/* ============================================================
   经管系学生会宣传部 · 招新页
   极简 · 暖纸白 × 墨 × 朱砂 —— 一点浪漫
   ============================================================ */
:root{
  --paper:#f6f2ea;
  --paper-2:#efe9dd;
  --ink:#171310;
  --muted:#4e463a;
  --line:rgba(23,19,16,.14);
  --accent:#b33f26;            /* 朱砂 */
  --accent-soft:#d99a6c;
  --dark:#141110;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,"SimSun",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(--paper);
  color:var(--ink);
  font-family:var(--sans);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
b{font-weight:600}

/* ---------- 顶栏 ---------- */
.topbar{
  position:fixed;inset:0 0 auto 0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,5vw,64px);
  background:rgba(246,242,234,.82);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .4s;
}
.topbar.scrolled{border-bottom-color:var(--line)}
.brand{font-family:var(--serif);font-weight:700;letter-spacing:.12em;font-size:15px}
.brand i{color:var(--accent);font-style:normal;margin:0 2px}
.nav{display:flex;gap:clamp(14px,2.6vw,30px);align-items:center;font-size:13.5px;letter-spacing:.08em;color:var(--muted)}
.nav a{transition:color .25s;position:relative}
.nav a:not(.nav-cta):hover{color:var(--ink)}
.nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:1px;background:var(--accent);transition:width .3s var(--ease)}
.nav a:not(.nav-cta):hover::after{width:100%}
.nav-cta{color:var(--paper);background:var(--ink);padding:7px 16px;border-radius:99px;letter-spacing:.14em}
.nav-cta:hover{background:var(--accent)}
@media(max-width:760px){.nav a:not(.nav-cta){display:none}}

/* ---------- HERO ---------- */
.hero{
  min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  align-items:center;text-align:center;
  padding:120px 24px 80px;
  background:var(--dark);
  color:var(--paper);
  position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(720px 420px at 78% -10%, rgba(179,63,38,.34), transparent 62%),
    radial-gradient(560px 380px at 12% 108%, rgba(217,156,106,.16), transparent 60%);
  pointer-events:none;
}
.hero-kicker{
  font-size:clamp(12px,1.6vw,14px);letter-spacing:.42em;text-indent:.42em;
  color:rgba(246,242,234,.62);margin-bottom:34px;position:relative;
}
.hero-title{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(56px,11vw,150px);
  line-height:1.05;letter-spacing:.04em;position:relative;
}
.hero-title .dot{color:var(--accent-soft)}
.hero-sub{
  margin-top:34px;font-size:clamp(15px,2.2vw,19px);
  color:rgba(246,242,234,.8);letter-spacing:.1em;line-height:2.2;position:relative;
}
.hero-cta{
  margin-top:56px;position:relative;
  border:1px solid rgba(246,242,234,.38);border-radius:99px;
  padding:13px 34px;font-size:14px;letter-spacing:.26em;text-indent:.26em;
  transition:all .35s var(--ease);
}
.hero-cta:hover{background:var(--paper);color:var(--dark);border-color:var(--paper)}
.hero-mark{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  width:1px;height:56px;
  background:linear-gradient(rgba(246,242,234,.55),transparent);
}

/* ---------- 通用 section ---------- */
.sec{max-width:1180px;margin:0 auto;padding:clamp(84px,11vh,150px) clamp(22px,5vw,60px)}
.sec-dark{max-width:none;background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:baseline;gap:8px 22px;flex-wrap:wrap;margin-bottom:clamp(40px,6vh,70px)}
.sec-head h2{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(30px,4.6vw,48px);letter-spacing:.06em;
}
.sec-dark .sec-head h2{color:var(--ink);}
.sec-note{flex-basis:100%;margin-left:0;color:#7d7466;font-size:11.5px;letter-spacing:.14em;line-height:1.7}

/* ---------- 关于 ---------- */
.prose{max-width:760px}
.prose p{color:var(--muted);font-size:clamp(15px,2vw,17px);letter-spacing:.04em}
.prose .lead{
  margin-top:26px;color:var(--ink);
  font-size:clamp(17px,2.5vw,22px);line-height:2;
  font-family:var(--serif);letter-spacing:.08em;
}

/* ---------- 卡片(日常) ---------- */
.cards{display:grid;grid-template-columns:1fr;gap:16px;max-width:720px;margin:0 auto}
.card{
  display:grid;grid-template-columns:auto 1fr;grid-template-areas:"ic h3" "ic p";
  column-gap:22px;row-gap:6px;align-items:center;
  border:1px solid var(--line);border-radius:18px;
  padding:clamp(26px,3.4vw,38px) clamp(22px,3vw,36px);
  background:rgba(255,255,255,.4);
  transition:transform .45s var(--ease),box-shadow .45s var(--ease),border-color .3s;
}
.card:hover{transform:translateY(-6px);box-shadow:0 22px 46px -26px rgba(23,19,16,.35);border-color:rgba(179,63,38,.35)}
.ic{grid-area:ic;width:52px;height:52px;fill:none;stroke:var(--accent);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;margin:0}
.card h3{grid-area:h3;font-family:var(--serif);font-size:clamp(28px,3.6vw,40px);letter-spacing:.16em;margin:0 0 6px;font-weight:800;color:var(--ink);line-height:1.25}
@supports ((-webkit-background-clip:text) or (background-clip:text)){.card h3{background:linear-gradient(100deg,#221c16 20%,#8f3a22 70%,#c24f30 120%);-webkit-background-clip:text;background-clip:text;color:transparent}}
.card p{grid-area:p;font-size:14.5px;color:var(--muted);line-height:1.95;max-width:34em}
.footnote{
  margin-top:clamp(34px,5vh,54px);text-align:center;color:var(--muted);
  font-size:clamp(13.5px,1.9vw,15.5px);letter-spacing:.06em;line-height:2.3;
}
.footnote b{color:var(--ink);border-bottom:1px solid var(--accent-soft);padding-bottom:2px}

/* ---------- 部长团 ---------- */
.people{
  display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,2.4vw,30px);
}
@media(max-width:760px){.people{grid-template-columns:1fr}}
.person{
  text-align:center;padding:clamp(30px,4vw,46px) 20px;
  border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.35);
  transition:all .4s var(--ease);
}
.person:hover{background:#fff}
.person.chief{border-color:rgba(179,63,38,.45);background:rgba(179,63,38,.05)}
.role{
  display:inline-block;font-size:12px;letter-spacing:.34em;text-indent:.34em;
  color:var(--accent);border:1px solid rgba(179,63,38,.4);
  padding:3px 12px;border-radius:99px;margin-bottom:18px;
}
.name{display:block;font-family:var(--serif);font-size:clamp(28px,3.6vw,36px);letter-spacing:.14em;font-weight:600;margin-bottom:10px}
.tagline{color:var(--muted);font-size:13.5px;letter-spacing:.12em}

/* ---------- 光影集(深底) ---------- */
.gal .gal-title{
  display:flex;align-items:baseline;gap:18px;flex-wrap:wrap;
  margin:clamp(44px,7vh,70px) 0 22px;
}
.gal .gal-title:first-child{margin-top:0}
.gal .gal-title h3{
  font-family:var(--serif);font-weight:600;color:var(--ink);
  font-size:clamp(19px,2.6vw,24px);letter-spacing:.14em;
}
.gal .gal-title span{color:var(--muted);font-size:13px;letter-spacing:.1em}
.masonry{columns:3;column-gap:14px}
.masonry figure{
  break-inside:avoid;margin-bottom:14px;border-radius:12px;overflow:hidden;
  position:relative;cursor:zoom-in;background:#000;
}
.masonry figure.wide{column-span:all}
.masonry img{width:100%;transition:transform .8s var(--ease);opacity:.94}
.masonry figure:hover img{transform:scale(1.03);opacity:1}
.masonry figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:26px 16px 12px;
  background:linear-gradient(transparent,rgba(0,0,0,.62));
  color:rgba(255,255,255,.92);font-size:12.5px;letter-spacing:.18em;text-indent:.18em;
  opacity:0;transition:opacity .35s;
}
.masonry figure:hover figcaption{opacity:1}
@media(max-width:920px){.masonry{columns:2}}
@media(max-width:560px){.masonry{columns:1}.masonry figure.wide{column-span:none}}

/* ---------- 故事(校园的光) ---------- */
.stories{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(16px,2.6vw,34px)}
@media(max-width:820px){.stories{grid-template-columns:1fr}}
.story{
  padding:clamp(24px,3.4vw,38px);border-radius:18px;
  border:1px solid var(--line);background:rgba(255,255,255,.4);
  transition:transform .4s var(--ease),border-color .3s;
  position:relative;
}
.story:hover{transform:translateY(-4px);border-color:rgba(179,63,38,.3)}
.story-no{
  font-family:var(--serif);font-size:13px;color:#a5642e;
  letter-spacing:.24em;display:block;margin-bottom:14px;
}
.story h3{font-family:var(--serif);font-size:clamp(19px,2.6vw,24px);font-weight:600;letter-spacing:.05em;margin-bottom:12px}
.story p{font-size:14.5px;color:var(--muted);line-height:2.05}
.story cite{display:block;margin-top:18px;font-size:12px;font-style:normal;color:#6b6150;letter-spacing:.1em}

/* ---------- 加入我们 (最后一屏 · 居中仪式感) ---------- */
.sec-final{background:var(--dark);color:var(--paper);max-width:none;position:relative;overflow:hidden;
  padding-top:clamp(64px,9vh,104px);padding-bottom:clamp(64px,9vh,104px)}
.sec-final::before{content:"";position:absolute;inset:0;background:
  radial-gradient(620px 340px at 50% -6%,rgba(179,63,38,.20),transparent 66%),
  radial-gradient(560px 320px at 50% 108%,rgba(217,156,106,.12),transparent 64%);
  pointer-events:none}
.final-inner{position:relative;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:rgba(246,242,234,.5);margin-bottom:18px}
.final-title{font-family:var(--serif);font-weight:600;
  font-size:clamp(28px,4.8vw,46px);line-height:1.45;letter-spacing:.1em;margin:0 0 16px}
.final-lead{color:rgba(246,242,234,.72);font-size:clamp(13.5px,1.8vw,15.5px);
  line-height:2.05;letter-spacing:.07em;margin:0 auto 30px}
.final-qr{background:var(--paper);padding:13px;border-radius:16px;
  box-shadow:0 28px 66px -28px rgba(0,0,0,.6)}
.final-qr img{width:min(172px,50vw);height:auto;display:block;border-radius:6px}
.qr-caption{margin-top:12px;text-align:center;font-size:11px;
  letter-spacing:.32em;text-indent:.32em;color:var(--muted)}
.final-group{margin-top:22px;display:flex;flex-direction:column;align-items:center}
.g-copy{
  display:inline-flex;align-items:center;justify-content:center;
  border:1.5px solid rgba(246,242,234,.42);border-radius:999px;
  background:rgba(246,242,234,.04);cursor:pointer;font-family:inherit;
  padding:10px 54px;min-width:min(300px,78vw);
  transition:all .35s var(--ease);
}
.g-copy:hover{border-color:var(--accent-soft);background:rgba(246,242,234,.09);transform:translateY(-2px)}
.g-copy:active{transform:translateY(0)}
.g-num{font-family:var(--serif);font-size:clamp(28px,4.2vw,38px);font-weight:700;
  letter-spacing:.16em;text-indent:.16em;color:var(--paper);line-height:1.25;
  transition:color .3s}
.g-copy:hover .g-num{color:var(--accent-soft)}
.g-copy.copied{border-color:rgba(127,160,91,.7);background:rgba(127,160,91,.14)}
.g-copy.copied .g-num{color:#a7d17f}
.g-hint{margin-top:11px;font-size:11.5px;letter-spacing:.36em;text-indent:.36em;
  color:rgba(246,242,234,.46)}
.g-copy:hover ~ .g-hint,.g-copy.copied ~ .g-hint{color:rgba(246,242,234,.72)}
.final-hint{margin-top:20px;font-size:12px;letter-spacing:.28em;text-indent:.28em;
  color:rgba(246,242,234,.4)}
/* ---------- footer ---------- */
.footer{
  background:var(--dark);color:rgba(246,242,234,.5);
  text-align:center;padding:44px 20px 60px;border-top:1px solid rgba(246,242,234,.08);
  font-size:13px;letter-spacing:.12em;line-height:2.3;
}
.foot-sub{color:rgba(246,242,234,.32);font-size:11.5px;letter-spacing:.2em}
.foot-soft{margin-top:10px;font-family:var(--serif);color:rgba(217,156,106,.55);font-size:12px;letter-spacing:.3em}

/* ---------- 灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:100;background:rgba(10,8,7,.92);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:6vh 4vw;backdrop-filter:blur(6px);
}
.lightbox[hidden]{display:none}
.lightbox img{max-width:92vw;max-height:80vh;border-radius:10px;box-shadow:0 30px 90px rgba(0,0,0,.6)}
.lb-cap{margin-top:18px;color:rgba(255,255,255,.7);font-size:13px;letter-spacing:.2em}
.lb-close{
  position:absolute;top:22px;right:30px;background:none;border:none;
  color:#fff;font-size:40px;line-height:1;cursor:pointer;opacity:.7;transition:opacity .2s;
}
.lb-close:hover{opacity:1}

/* ---------- 入场动画 (仅 JS 可用时隐藏初始态, 防整页不可见) ---------- */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s 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}
}

/* 正文两端对齐, 让整页文字右缘整齐 */
.prose p, .card p, .story p, .final-text p { text-align: justify; }

@media(max-width:430px){.card{grid-template-columns:1fr;grid-template-areas:"ic" "h3" "p";row-gap:10px}.ic{margin-top:0}.card p{max-width:none}}