/* ==========================================================================
   东华理工大学统计协会 · 样式
   配色取自会徽：深藏蓝 (#0f3b7c) + 金 (#c8912f) + 少量竞赛绿 (#2e9e5b)
   ========================================================================== */

:root{
  --navy-900:#061a3a;
  --navy-800:#0a2a5c;
  --navy-700:#0f3b7c;
  --navy-600:#1a4f97;
  --navy-100:#e8eef7;
  --gold-600:#a5741f;
  --gold-500:#c8912f;
  --gold-400:#dcae52;
  --gold-100:#f6ecd8;
  --green:#2e9e5b;
  --ink:#16233a;
  --ink-soft:#4b5a72;
  --ink-mute:#7c8798;
  --line:#dfe5ee;
  --bg:#ffffff;
  --bg-alt:#f5f8fc;
  --radius:14px;
  --shadow-sm:0 2px 10px rgba(6,26,58,.06);
  --shadow:0 10px 34px rgba(6,26,58,.10);
  --shadow-lg:0 22px 60px rgba(6,26,58,.16);
  --ease:cubic-bezier(.22,.61,.36,1);
  --wrap:1180px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,
         "Segoe UI",Roboto,"Helvetica Neue",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth;scroll-padding-top:78px;-webkit-text-size-adjust:100%}

body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
ul,ol,dl,dd{margin:0;padding:0}
li{list-style:none}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}

.skip{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--navy-700);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;
}
.skip:focus{left:0}

:focus-visible{outline:3px solid var(--gold-500);outline-offset:3px;border-radius:4px}

/* ---------- 阅读进度条 ---------- */
.progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:120;
  background:transparent;pointer-events:none;
}
.progress span{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--gold-500),var(--gold-400),var(--green));
  transition:width .12s linear;
}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:110;
  background:rgba(6,26,58,.14);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.14);
  transition:background .35s var(--ease),box-shadow .35s var(--ease),
             border-color .35s var(--ease);
}
.nav.solid{
  background:rgba(255,255,255,.94);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-sm);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}

.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand img{width:42px;height:42px;object-fit:contain;filter:drop-shadow(0 2px 4px rgba(0,0,0,.18))}
.brand-txt{display:flex;flex-direction:column;line-height:1.2}
.brand-txt b{font-family:var(--serif);font-size:19px;letter-spacing:.06em;color:#fff;transition:color .35s}
.brand-txt i{font-style:normal;font-size:9.5px;letter-spacing:.16em;color:rgba(255,255,255,.72);transition:color .35s}
.nav.solid .brand-txt b{color:var(--navy-700)}
.nav.solid .brand-txt i{color:var(--ink-mute)}

.menu{display:flex;align-items:center;gap:4px}
.menu a{
  position:relative;padding:8px 11px;font-size:14.5px;color:rgba(255,255,255,.9);
  border-radius:8px;transition:color .25s,background .25s;white-space:nowrap;
}
.menu a::after{
  content:"";position:absolute;left:11px;right:11px;bottom:3px;height:2px;
  background:var(--gold-400);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.menu a:hover::after,.menu a.active::after{transform:scaleX(1)}
.nav.solid .menu a{color:var(--ink-soft)}
.nav.solid .menu a:hover,.nav.solid .menu a.active{color:var(--navy-700)}
.menu a.active{color:#fff;font-weight:600}

.menu a.cta-sm{
  margin-left:8px;background:linear-gradient(135deg,var(--gold-500),var(--gold-400));
  color:#fff;font-weight:600;padding:8px 17px;box-shadow:0 4px 14px rgba(165,116,31,.34);
}
.menu a.cta-sm::after{display:none}
.menu a.cta-sm:hover{transform:translateY(-1px);color:#fff}
.nav.solid .menu a.cta-sm{color:#fff}

.burger{
  display:none;width:42px;height:42px;border:0;background:transparent;
  cursor:pointer;padding:9px;border-radius:8px;
}
.burger span{
  display:block;height:2px;background:#fff;border-radius:2px;margin:4.5px 0;
  transition:transform .3s var(--ease),opacity .25s,background .35s;
}
.nav.solid .burger span{background:var(--navy-700)}
.burger.on span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.burger.on span:nth-child(2){opacity:0}
.burger.on span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
/* ---------- HERO ---------- */
.hero{
  position:relative;min-height:100vh;min-height:100svh;
  display:flex;align-items:center;justify-content:center;
  text-align:center;overflow:hidden;
  background:
    radial-gradient(120% 80% at 50% -10%,#1a4f97 0%,transparent 60%),
    linear-gradient(165deg,#0a2a5c 0%,#061a3a 55%,#04122a 100%);
  color:#fff;
}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.5}
.hero-glow{
  position:absolute;left:50%;top:44%;width:min(900px,92vw);aspect-ratio:1;
  transform:translate(-50%,-50%);pointer-events:none;
  background:radial-gradient(circle,rgba(200,145,47,.20) 0%,transparent 62%);
  animation:breathe 9s ease-in-out infinite;
}
@keyframes breathe{
  0%,100%{opacity:.55;transform:translate(-50%,-50%) scale(1)}
  50%{opacity:.95;transform:translate(-50%,-50%) scale(1.1)}
}
.hero-in{position:relative;z-index:2;padding-top:70px;padding-bottom:60px}

.hero-logo{
  width:clamp(120px,17vw,168px);margin:0 auto 26px;
  /* 会徽内环文字为深藏蓝，在深色首屏上需垫一层柔光才能看清 */
  background:radial-gradient(circle at 50% 47%,
    rgba(255,255,255,.94) 0 34%,
    rgba(255,255,255,.62) 48%,
    rgba(255,255,255,.16) 60%,
    transparent 70%);
  filter:drop-shadow(0 10px 30px rgba(0,0,0,.42));
  animation:logoIn 1.3s var(--ease) both;
}
@keyframes logoIn{
  from{opacity:0;transform:translateY(26px) scale(.9)}
  to{opacity:1;transform:none}
}

.hero-kicker{
  display:inline-flex;align-items:center;gap:11px;flex-wrap:wrap;justify-content:center;
  font-size:12.5px;letter-spacing:.24em;color:var(--gold-400);
  text-transform:uppercase;margin-bottom:18px;
  animation:up .9s .2s var(--ease) both;
}
.hero-kicker em{font-style:normal;opacity:.55}

.hero-title{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(34px,6.4vw,68px);letter-spacing:.03em;
  animation:up 1s .32s var(--ease) both;
}
.hero-title b{
  font-weight:700;
  background:linear-gradient(100deg,var(--gold-400),#f2d79a 45%,var(--gold-500));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

.hero-motto{
  font-family:var(--serif);
  font-size:clamp(17px,2.7vw,27px);letter-spacing:.16em;
  margin:22px 0 6px;min-height:1.6em;color:rgba(255,255,255,.95);
}
.hero-motto .cursor{
  display:inline-block;width:2px;height:1em;vertical-align:-.12em;
  margin-left:3px;background:var(--gold-400);animation:blink 1s step-end infinite;
}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}

.hero-slogan{
  font-size:15px;color:rgba(255,255,255,.7);margin-top:14px;line-height:2;
  animation:up 1s .5s var(--ease) both;
}
.hero-slogan i{font-style:normal;font-size:13.5px;color:rgba(255,255,255,.5)}

.hero-btns{
  display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:34px;
  animation:up 1s .62s var(--ease) both;
}
.btn{
  display:inline-block;padding:13px 34px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.06em;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),
             background .28s,border-color .28s;
}
.btn-gold{
  background:linear-gradient(135deg,var(--gold-500),var(--gold-400));
  color:#fff;box-shadow:0 10px 30px rgba(165,116,31,.42);
}
.btn-gold:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(165,116,31,.55)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.42);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-3px)}

.hero-model{
  display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:44px;
  animation:up 1s .76s var(--ease) both;
}
.hero-model li{
  display:flex;align-items:center;gap:10px;
  padding:8px 18px;border-radius:999px;font-size:13.5px;letter-spacing:.1em;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);
  backdrop-filter:blur(6px);
}
.hero-model li b{color:var(--gold-400);font-family:var(--serif);font-size:15px}

@keyframes up{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}

.scroll-cue{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  width:26px;height:42px;border:1.5px solid rgba(255,255,255,.4);
  border-radius:14px;z-index:3;
}
.scroll-cue span{
  position:absolute;left:50%;top:9px;width:3px;height:7px;border-radius:2px;
  background:var(--gold-400);transform:translateX(-50%);
  animation:cue 1.7s var(--ease) infinite;
}
@keyframes cue{
  0%{opacity:0;transform:translate(-50%,0)}
  35%{opacity:1}
  100%{opacity:0;transform:translate(-50%,17px)}
}
/* ---------- 区块通用 ---------- */
.sec{padding:96px 0;position:relative}
.sec-alt{background:var(--bg-alt)}
.sec-dark{
  background:linear-gradient(160deg,var(--navy-800),var(--navy-900));
  color:#fff;
}
.sec-dark .lead{color:rgba(255,255,255,.66)}
.sec-dark .eyebrow{color:var(--gold-400)}

.sec-head{max-width:740px;margin:0 auto 56px;text-align:center}
.eyebrow{
  font-size:12px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--gold-600);font-weight:600;margin-bottom:14px;
}
.sec-head h2{
  font-family:var(--serif);font-size:clamp(26px,4vw,40px);
  letter-spacing:.05em;color:var(--navy-800);position:relative;
  display:inline-block;padding-bottom:16px;
}
.sec-head h2::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:56px;height:3px;border-radius:2px;
  background:linear-gradient(90deg,var(--gold-500),var(--gold-400));
}
.lead{margin-top:16px;font-size:16px;color:var(--ink-soft)}

/* 深色区块的标题需要在 .sec-head h2 之后覆盖，否则会被深蓝色盖住 */
.sec-dark .sec-head h2{color:#fff}
.sec-dark .sec-head h2::after{
  background:linear-gradient(90deg,var(--gold-400),#f2d79a);
}

.sub-head{
  font-family:var(--serif);font-size:22px;letter-spacing:.08em;
  color:var(--navy-800);text-align:center;margin:68px 0 26px;
}

/* 滚动进场 */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 简介 ---------- */
.about-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:40px;align-items:start}
.about-txt p{margin-bottom:20px;color:var(--ink-soft);font-size:15.5px;line-height:2}
.about-txt p:first-child{
  font-size:16.5px;color:var(--ink);
  border-left:3px solid var(--gold-500);padding-left:20px;
}

.about-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 28px;box-shadow:var(--shadow-sm);position:sticky;top:96px;
}
.about-card h3{
  font-family:var(--serif);font-size:19px;color:var(--navy-800);
  letter-spacing:.06em;margin-bottom:20px;padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.facts div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px dashed var(--line)}
.facts div:last-child{border-bottom:0}
.facts dt{font-size:13.5px;color:var(--ink-mute);white-space:nowrap}
.facts dd{font-size:13.5px;color:var(--ink);text-align:right;font-weight:500}

/* ---------- 数字 ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:64px;
}
.stats li{
  text-align:center;padding:30px 18px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s;
}
.stats li:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--gold-400)}
.stats .num{
  font-family:var(--serif);font-size:42px;font-weight:700;line-height:1;
  color:var(--navy-700);letter-spacing:.02em;
}
.stats .num i{font-style:normal;font-size:17px;margin-left:3px;color:var(--gold-500)}
.stats .lb{margin-top:11px;font-size:14.5px;font-weight:600;color:var(--ink)}
.stats .nt{margin-top:4px;font-size:12.5px;color:var(--ink-mute)}

/* ---------- 组织架构 ---------- */
.council{
  max-width:640px;margin:0 auto;text-align:center;padding:32px 30px;
  border-radius:var(--radius);color:#fff;
  background:linear-gradient(135deg,var(--navy-700),var(--navy-800));
  box-shadow:var(--shadow);
}
.council h3{font-family:var(--serif);font-size:24px;letter-spacing:.12em}
.council p{margin-top:12px;font-size:14px;color:rgba(255,255,255,.74);line-height:1.9}
.council ul{display:flex;gap:9px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.council li{
  padding:6px 15px;border-radius:999px;font-size:13px;
  background:rgba(220,174,82,.18);border:1px solid rgba(220,174,82,.4);
  color:var(--gold-400);
}

.org-line{display:flex;justify-content:center;height:46px}
.org-line i{
  display:block;width:2px;height:100%;
  background:linear-gradient(180deg,var(--navy-700),var(--gold-500));
}

.dept-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:22px}
.dept{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;position:relative;overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .38s var(--ease),box-shadow .38s var(--ease);
}
.dept::before{
  content:"";position:absolute;left:0;top:0;height:3px;width:100%;
  background:linear-gradient(90deg,var(--navy-700),var(--gold-500));
  transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease);
}
.dept:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg)}
.dept:hover::before{transform:scaleX(1)}
.dept-ic{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:var(--navy-100);color:var(--navy-700);margin-bottom:16px;
  transition:background .35s,color .35s,transform .45s var(--ease);
}
.dept:hover .dept-ic{background:var(--navy-700);color:var(--gold-400);transform:rotate(-6deg) scale(1.06)}
.dept-ic svg{width:23px;height:23px}
.dept h3{font-family:var(--serif);font-size:18.5px;color:var(--navy-800);letter-spacing:.05em}
.dept .duty{margin-top:12px;font-size:14px;color:var(--ink-soft);line-height:1.9}
.dept .need{
  margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--ink-mute);line-height:1.85;
}
.dept .need b{color:var(--gold-600);font-weight:600}
/* ---------- 指导教师 ---------- */
/* min() 包裹是必需的：裸 minmax(340px,…) 在 320px 窄屏会强撑出横向滚动 */
.teacher-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(340px,100%),1fr));gap:26px}
.teacher{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .38s var(--ease),box-shadow .38s var(--ease);
}
.teacher:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.teacher-top{
  display:flex;align-items:center;gap:18px;padding:26px 26px 22px;
  background:linear-gradient(135deg,var(--navy-700),var(--navy-800));color:#fff;
}
.avatar{
  width:62px;height:62px;border-radius:50%;flex-shrink:0;
  display:grid;place-items:center;font-family:var(--serif);font-size:25px;
  background:linear-gradient(135deg,var(--gold-500),var(--gold-400));
  color:#fff;box-shadow:0 6px 18px rgba(0,0,0,.28);
}
.teacher-top h3{font-family:var(--serif);font-size:21px;letter-spacing:.1em}
.teacher-top .tt{font-size:13px;color:var(--gold-400);margin-top:5px}
.teacher-top .ed{font-size:12.5px;color:rgba(255,255,255,.6);margin-top:3px}
.teacher-body{padding:22px 26px 26px;flex:1}
.teacher-field{
  font-size:13px;color:var(--navy-700);font-weight:600;
  padding-bottom:14px;margin-bottom:14px;border-bottom:1px dashed var(--line);
}
.teacher-body .bio{font-size:14px;color:var(--ink-soft);line-height:1.95}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tags li{
  font-size:12px;padding:5px 12px;border-radius:999px;
  background:var(--gold-100);color:var(--gold-600);border:1px solid #ecdcbe;
}

/* ---------- 届次切换 ---------- */
.tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:36px}
.tab{
  display:flex;align-items:center;gap:9px;cursor:pointer;
  padding:10px 22px;border-radius:999px;font-size:14px;font-weight:600;
  background:#fff;border:1px solid var(--line);color:var(--ink-soft);
  transition:all .3s var(--ease);
}
.tab:hover{border-color:var(--gold-400);color:var(--navy-700)}
.tab.on{
  background:linear-gradient(135deg,var(--navy-700),var(--navy-800));
  border-color:transparent;color:#fff;box-shadow:0 8px 22px rgba(15,59,124,.3);
}
.tab small{font-size:11.5px;font-weight:400;opacity:.72}
.tab .badge{
  font-size:10.5px;padding:2px 8px;border-radius:999px;
  background:var(--green);color:#fff;font-weight:600;
}
.tab.on .badge{background:var(--gold-500)}

.term-panel{animation:fadeUp .55s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

/* ---------- 成员 ---------- */
.mem-note{
  max-width:820px;margin:0 auto 34px;text-align:center;
  font-size:13.5px;color:var(--ink-mute);line-height:1.9;
  padding:14px 20px;background:#fff;border:1px dashed var(--line);border-radius:10px;
}
.lead-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(178px,1fr));gap:16px;margin-bottom:40px}
.lead-card{
  text-align:center;padding:24px 16px;border-radius:var(--radius);
  background:linear-gradient(160deg,#fff,var(--navy-100));
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.lead-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.lead-card .role{
  font-family:var(--serif);font-size:17px;color:var(--navy-800);letter-spacing:.1em;
}
.lead-card .who{margin-top:10px;font-size:15px;font-weight:600;color:var(--navy-700)}
.lead-card .who.tbd{font-size:12.5px;font-weight:400;color:var(--ink-mute);font-style:italic}

.roster-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  flex-wrap:wrap;margin-bottom:16px;
}
.roster-head h4{font-family:var(--serif);font-size:18px;color:var(--navy-800);letter-spacing:.08em}
.roster-head span{font-size:13px;color:var(--ink-mute)}

.roster{display:grid;grid-template-columns:repeat(auto-fill,minmax(146px,1fr));gap:12px}
.mem{
  display:flex;align-items:center;gap:11px;padding:12px 14px;
  background:#fff;border:1px solid var(--line);border-radius:11px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s;
}
.mem:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--gold-400)}
.mem .ini{
  width:34px;height:34px;border-radius:9px;flex-shrink:0;
  display:grid;place-items:center;font-family:var(--serif);font-size:15px;
  background:var(--navy-100);color:var(--navy-700);
}
.mem.founder .ini{background:linear-gradient(135deg,var(--gold-500),var(--gold-400));color:#fff}
.mem .nm{font-size:14.5px;font-weight:600;line-height:1.35}
.mem .gr{font-size:11.5px;color:var(--ink-mute)}
.mem .star{margin-left:auto;color:var(--gold-500);font-size:12px}

.legend{
  display:flex;gap:18px;justify-content:center;flex-wrap:wrap;
  margin-top:24px;font-size:12.5px;color:var(--ink-mute);
}
.legend i{
  display:inline-block;width:11px;height:11px;border-radius:3px;
  vertical-align:-1px;margin-right:6px;
}
.legend .g{background:linear-gradient(135deg,var(--gold-500),var(--gold-400))}
.legend .b{background:var(--navy-100);border:1px solid var(--line)}
/* ---------- 活动时间轴 ---------- */
.timeline{position:relative;max-width:900px;margin:0 auto;padding-left:0}
.timeline::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;
  transform:translateX(-50%);
  background:linear-gradient(180deg,transparent,var(--line) 6%,var(--line) 94%,transparent);
}
.tl{position:relative;width:50%;padding:0 40px 34px 0;}
.tl:nth-child(even){margin-left:50%;padding:0 0 34px 40px}
.tl-dot{
  position:absolute;top:20px;right:-7px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--gold-500);z-index:2;
  transition:transform .35s var(--ease),background .35s,border-color .35s;
}
.tl:nth-child(even) .tl-dot{right:auto;left:-7px}
.tl:hover .tl-dot{background:var(--gold-500);transform:scale(1.3)}

.tl-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.tl:hover .tl-card{transform:translateY(-5px);box-shadow:var(--shadow)}
.tl-meta{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:11px}
.tl-phase{
  font-family:var(--serif);font-size:13px;font-weight:700;letter-spacing:.06em;
  color:var(--navy-700);padding:3px 11px;border-radius:6px;background:var(--navy-100);
}
.tl-tag{
  font-size:11.5px;padding:3px 10px;border-radius:999px;
  background:var(--gold-100);color:var(--gold-600);border:1px solid #ecdcbe;
}
.tl-card h3{font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:.04em}
.tl-when{margin-top:7px;font-size:12.5px;color:var(--ink-mute)}
.tl-card p.d{margin-top:11px;font-size:14px;color:var(--ink-soft);line-height:1.9}

/* ---------- 阶梯参赛体系 ---------- */
.ladder{display:grid;grid-template-columns:repeat(auto-fit,minmax(252px,1fr));gap:20px}
.rung{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .38s var(--ease),box-shadow .38s var(--ease);
}
.rung:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg)}
.rung .stage{
  display:inline-block;font-size:11.5px;letter-spacing:.12em;font-weight:600;
  padding:4px 12px;border-radius:999px;margin-bottom:14px;
  background:linear-gradient(135deg,var(--navy-700),var(--navy-600));color:#fff;
}
.rung h3{font-family:var(--serif);font-size:17px;color:var(--navy-800);line-height:1.55}
.rung .desc{margin-top:11px;font-size:13.5px;color:var(--ink-soft);line-height:1.9}
.rung .goal{
  margin-top:15px;padding-top:13px;border-top:1px dashed var(--line);
  font-size:12.5px;color:var(--gold-600);line-height:1.8;
}
.rung .goal b{font-weight:600}

/* ---------- 荣誉墙 ---------- */
.award-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr));gap:20px}
.award{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--gold-500);
  border-radius:12px;padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.award:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.award .top{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:10px}
.award .lv{
  font-size:11.5px;padding:3px 10px;border-radius:999px;
  background:var(--navy-700);color:#fff;
}
.award .pz{font-family:var(--serif);font-size:16px;font-weight:700;color:var(--gold-600)}
.award .yr{margin-left:auto;font-size:12.5px;color:var(--ink-mute)}
.award h4{font-size:15px;color:var(--ink);line-height:1.6}
.award .work{margin-top:8px;font-size:13.5px;color:var(--navy-700)}
.award .who{margin-top:10px;font-size:12.5px;color:var(--ink-mute);line-height:1.8}

.empty{
  max-width:660px;margin:0 auto;text-align:center;padding:52px 30px;
  border:1px dashed var(--line);border-radius:var(--radius);background:#fff;
}
.empty .ico{font-size:38px;margin-bottom:14px;opacity:.34}
.empty h4{font-family:var(--serif);font-size:19px;color:var(--navy-800);letter-spacing:.06em}
.empty p{margin-top:11px;font-size:14px;color:var(--ink-mute);line-height:1.95}
.empty code{
  font-size:12.5px;background:var(--bg-alt);padding:2px 7px;border-radius:5px;
  color:var(--gold-600);border:1px solid var(--line);
}

/* ---------- 培养体系 ---------- */
.curr-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(288px,100%),1fr));gap:22px}
.curr{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:28px 26px;overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .38s var(--ease),box-shadow .38s var(--ease);
}
.curr:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg)}
.curr .step{
  position:absolute;right:18px;top:12px;
  font-family:var(--serif);font-size:52px;font-weight:700;line-height:1;
  color:var(--navy-100);transition:color .38s;
}
.curr:hover .step{color:var(--gold-100)}
.curr h3{
  position:relative;font-family:var(--serif);font-size:18.5px;
  color:var(--navy-800);letter-spacing:.05em;margin-bottom:16px;
}
.curr ul{position:relative;display:flex;flex-direction:column;gap:9px}
.curr li{
  display:flex;gap:10px;font-size:14px;color:var(--ink-soft);line-height:1.75;
}
.curr li::before{
  content:"";width:6px;height:6px;border-radius:50%;flex-shrink:0;
  margin-top:9px;background:var(--gold-500);
}
.curr .note{
  margin-top:15px;padding-top:13px;border-top:1px dashed var(--line);
  font-size:12.5px;color:var(--ink-mute);
}
/* ---------- 发展蓝图 ---------- */
.goal-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr));gap:24px}
.goal{
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius);padding:30px 26px;
  backdrop-filter:blur(4px);
  transition:transform .4s var(--ease),background .4s,border-color .4s;
}
.goal:hover{transform:translateY(-7px);background:rgba(255,255,255,.1);border-color:rgba(220,174,82,.45)}
.goal .span{
  font-family:var(--serif);font-size:21px;letter-spacing:.1em;color:var(--gold-400);
}
.goal .range{
  display:inline-block;margin-top:9px;font-size:11.5px;letter-spacing:.14em;
  padding:3px 12px;border-radius:999px;
  background:rgba(220,174,82,.16);border:1px solid rgba(220,174,82,.36);color:var(--gold-400);
}
.goal ul{margin-top:20px;display:flex;flex-direction:column;gap:14px}
.goal li{
  display:flex;gap:12px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.78);
}
.goal li i{
  flex-shrink:0;width:20px;height:20px;border-radius:50%;margin-top:5px;
  display:grid;place-items:center;font-style:normal;font-size:11px;font-weight:700;
  background:rgba(220,174,82,.2);color:var(--gold-400);
}

/* ---------- 资源库 ---------- */
.res-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(262px,1fr));gap:20px}
.res{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .38s var(--ease),box-shadow .38s var(--ease),border-color .38s;
}
.res:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--gold-400)}
.res .pf{
  display:inline-block;font-size:11.5px;letter-spacing:.1em;font-weight:600;
  padding:3px 11px;border-radius:6px;margin-bottom:13px;
  background:var(--navy-100);color:var(--navy-700);
}
.res h3{font-family:var(--serif);font-size:17.5px;color:var(--navy-800);letter-spacing:.05em}
.res p{margin-top:11px;font-size:13.5px;color:var(--ink-soft);line-height:1.9}
.res .go{
  margin-top:16px;font-size:13px;font-weight:600;color:var(--gold-600);
  display:inline-flex;align-items:center;gap:6px;
}
.res .go span{transition:transform .3s var(--ease)}
.res:hover .go span{transform:translateX(5px)}
.res .soon{margin-top:16px;font-size:12.5px;color:var(--ink-mute);font-style:italic}

/* ---------- 加入我们 ---------- */
.join-steps{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(196px,1fr));
  gap:18px;margin-bottom:44px;counter-reset:js;
}
.join-steps li{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 22px 22px;box-shadow:var(--shadow-sm);
  counter-increment:js;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.join-steps li:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.join-steps li::before{
  content:counter(js,decimal-leading-zero);
  display:block;font-family:var(--serif);font-size:15px;font-weight:700;
  color:var(--gold-500);letter-spacing:.08em;margin-bottom:11px;
}
.join-steps h3{font-size:15.5px;color:var(--navy-800);line-height:1.55}
.join-steps p{margin-top:9px;font-size:13.5px;color:var(--ink-soft);line-height:1.85}

.join-two{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.join-box{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;box-shadow:var(--shadow-sm);
}
.join-box h3{
  font-family:var(--serif);font-size:19px;color:var(--navy-800);letter-spacing:.06em;
  padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid var(--line);
}
.tick{display:flex;flex-direction:column;gap:12px}
.tick li{display:flex;gap:11px;font-size:14.5px;color:var(--ink-soft);line-height:1.8}
.tick li::before{
  content:"✓";flex-shrink:0;width:20px;height:20px;border-radius:50%;
  display:grid;place-items:center;font-size:11px;font-weight:700;margin-top:4px;
  background:var(--gold-100);color:var(--gold-600);
}

.join-note{
  margin-top:30px;text-align:center;font-size:13.5px;color:var(--ink-mute);
  line-height:1.95;padding:18px 24px;border-radius:10px;
  background:#fff;border:1px dashed var(--line);
}

/* ---------- 页脚 ---------- */
.foot{
  background:linear-gradient(165deg,var(--navy-800),var(--navy-900));
  color:rgba(255,255,255,.72);padding-top:64px;position:relative;
}
.foot-in{display:grid;grid-template-columns:1fr 2fr;gap:44px;padding-bottom:48px}
.foot-brand img{width:96px;margin-bottom:18px;filter:drop-shadow(0 6px 18px rgba(0,0,0,.4))}
.foot-motto{
  font-family:var(--serif);font-size:16px;line-height:2;letter-spacing:.12em;
  color:var(--gold-400);
}
.foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.foot-cols h4{
  font-size:14.5px;color:#fff;letter-spacing:.1em;margin-bottom:16px;
  padding-bottom:11px;border-bottom:1px solid rgba(255,255,255,.14);
}
.foot-cols a,.foot-cols p{
  display:block;font-size:13.5px;line-height:2.1;color:rgba(255,255,255,.62);
  transition:color .25s,transform .25s var(--ease);
}
.foot-cols a:hover{color:var(--gold-400);transform:translateX(4px)}

.foot-bar{border-top:1px solid rgba(255,255,255,.11);padding:20px 0}
.foot-bar-in{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.44);
}

.top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;z-index:100;
  display:grid;place-items:center;border-radius:50%;font-size:19px;color:#fff;
  background:linear-gradient(135deg,var(--navy-700),var(--navy-800));
  box-shadow:var(--shadow);opacity:0;visibility:hidden;
  transform:translateY(14px);
  transition:opacity .35s var(--ease),transform .35s var(--ease),visibility .35s;
}
.top.show{opacity:1;visibility:visible;transform:none}
.top:hover{background:linear-gradient(135deg,var(--gold-500),var(--gold-400))}
/* ==========================================================================
   响应式
   ========================================================================== */

/* 1121–1240px：横向导航仍显示但余量偏紧，收窄链接内边距。
   注意此范围不可与下方版式断点合并——1120px 以下已切汉堡，导航规则在那里是死代码。 */
@media (min-width:1121px) and (max-width:1240px){
  .menu{gap:2px}
  .menu a{padding:8px 9px;font-size:13.5px}
  .menu a::after{left:9px;right:9px}
}

@media (max-width:1080px){
  .about-grid{grid-template-columns:1fr}
  .about-card{position:static}
  .stats{grid-template-columns:repeat(2,1fr)}
}

/* 1120px 以下横向导航（9 项 + 按钮）会挤到 20px 间距，直接切汉堡菜单 */
@media (max-width:1120px){
  .burger{display:block}
  .menu{
    position:fixed;top:70px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    /* 必须完全不透明：半透明时首屏标题会透过菜单，文字互相叠压 */
    background:#fff;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    padding:10px 20px 22px;
    max-height:0;overflow:hidden;opacity:0;visibility:hidden;
    transition:max-height .42s var(--ease),opacity .3s,visibility .3s,padding .3s;
  }
  .menu.open{max-height:calc(100vh - 70px);opacity:1;visibility:visible;overflow-y:auto}
  .menu a{
    color:var(--ink-soft);padding:14px 6px;border-bottom:1px solid var(--line);
    border-radius:0;font-size:15px;
  }
  .menu a::after{display:none}
  .menu a:last-child{border-bottom:0}
  .menu a.active{color:var(--navy-700)}
  .menu a.cta-sm{
    margin:14px 0 0;text-align:center;border-radius:999px;padding:13px;
  }
}

/* 以下为版式收窄，与导航切换分开，避免平板横屏提前变单列 */
@media (max-width:860px){
  .sec{padding:70px 0}
  .sec-head{margin-bottom:42px}

  /* 时间轴改为单列左对齐 */
  .timeline::before{left:7px;transform:none}
  .tl,.tl:nth-child(even){
    width:100%;margin-left:0;padding:0 0 26px 32px;
  }
  .tl-dot,.tl:nth-child(even) .tl-dot{left:1px;right:auto;top:18px}

  .join-two{grid-template-columns:1fr}
  .foot-in{grid-template-columns:1fr;gap:34px}
  .foot-cols{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:560px){
  body{font-size:15.5px}
  .wrap{padding:0 18px}
  .hero-in{padding-top:60px}
  .hero-kicker{font-size:11px;letter-spacing:.16em}
  .hero-motto{letter-spacing:.1em}
  .hero-btns{flex-direction:column;align-items:stretch}
  .btn{text-align:center}
  .hero-model{gap:8px}
  .hero-model li{padding:7px 14px;font-size:12.5px}

  .stats{grid-template-columns:1fr;gap:14px}
  .stats li{display:flex;align-items:center;gap:16px;text-align:left;padding:20px 22px}
  .stats .num{font-size:34px}
  .stats .lb,.stats .nt{margin-top:0}
  .stats .txt{flex:1}

  .roster{grid-template-columns:repeat(auto-fill,minmax(132px,1fr));gap:10px}
  .foot-cols{grid-template-columns:1fr}
  .foot-bar-in{flex-direction:column;gap:8px}
  .top{right:14px;bottom:14px;width:40px;height:40px}
}

/* 极窄屏（iPhone SE 等 320px）：教师卡文字列仅剩 150px，
   "概率论与数理统计 博士" 会断成难看的两行。改为头像上置、文字占满整行。 */
@media (max-width:370px){
  .teacher-top{flex-direction:column;align-items:center;text-align:center;gap:14px;padding:24px 20px 20px}
  .teacher-body{padding:20px}
  .teacher-field{padding:14px 16px}
}

/* 尊重系统的减少动效偏好 */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .reveal{opacity:1;transform:none}
  .hero-canvas{display:none}
}

/* ==========================================================================
   查看详情：卡片按钮 + 弹窗 + 照片画廊 + 大图
   数据里写了 detail 或 photos 的条目才会出现按钮，见 assets/data/ 注释
   ========================================================================== */
.more-btn{
  margin-top:14px;display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border:1px solid var(--line);border-radius:999px;
  background:#fff;color:var(--navy-700);font-family:var(--sans);
  font-size:12.5px;letter-spacing:.04em;cursor:pointer;
  transition:background .22s var(--ease),border-color .22s var(--ease),
             color .22s var(--ease),transform .22s var(--ease);
}
.more-btn::after{content:"›";font-size:15px;line-height:1}
.more-btn:hover{
  background:var(--navy-700);border-color:var(--navy-700);color:#fff;
  transform:translateX(2px);
}
.more-btn:focus-visible{outline:2px solid var(--gold-500);outline-offset:2px}
.more-btn .cam{
  font-size:11.5px;color:var(--gold-600);letter-spacing:.06em;
}
.more-btn:hover .cam{color:var(--gold-400)}

body.locked{overflow:hidden}

.modal{position:fixed;inset:0;z-index:300;display:flex;
  align-items:center;justify-content:center;padding:26px 18px}
.modal[hidden]{display:none}
.modal-back{
  position:absolute;inset:0;background:rgba(6,26,58,.62);
  backdrop-filter:blur(3px);opacity:0;transition:opacity .2s var(--ease);
}
.modal.on .modal-back{opacity:1}
.modal-box{
  position:relative;width:min(760px,100%);max-height:88vh;overflow-y:auto;
  background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-lg);
  padding:34px 34px 30px;
  opacity:0;transform:translateY(14px) scale(.985);
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.modal.on .modal-box{opacity:1;transform:none}
.modal-x{
  position:absolute;top:12px;right:14px;width:34px;height:34px;
  display:grid;place-items:center;border:0;border-radius:50%;
  background:transparent;color:var(--ink-mute);font-size:24px;line-height:1;
  cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease);
}
.modal-x:hover{background:var(--bg-alt);color:var(--ink)}
.modal-x:focus-visible{outline:2px solid var(--gold-500);outline-offset:2px}
.modal-meta{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:12px}
.modal-meta .lv{
  padding:3px 11px;border-radius:999px;background:var(--navy-100);
  color:var(--navy-700);font-size:12px;letter-spacing:.06em;
}
.modal-meta .pz{
  padding:3px 11px;border-radius:999px;background:var(--gold-100);
  color:var(--gold-600);font-size:12px;letter-spacing:.06em;
}
.modal-meta .yr{margin-left:auto;font-size:12.5px;color:var(--ink-mute)}
.modal-box h3{
  margin:0;font-family:var(--serif);font-size:22px;color:var(--navy-800);
  letter-spacing:.04em;line-height:1.5;padding-right:30px;
}
.modal-sub{margin:8px 0 0;font-size:13px;color:var(--ink-mute)}
.modal-text{
  margin-top:18px;padding-top:18px;border-top:1px solid var(--line);
}
.modal-text p{margin:0 0 12px;font-size:14.5px;color:var(--ink-soft);line-height:2}
.modal-text p:last-child{margin-bottom:0}

.shots{
  margin-top:22px;display:grid;gap:14px;
  grid-template-columns:repeat(auto-fill,minmax(min(200px,100%),1fr));
}
.shot{
  margin:0;border-radius:10px;overflow:hidden;background:var(--bg-alt);
  border:1px solid var(--line);cursor:zoom-in;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.shot:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.shot:focus-visible{outline:2px solid var(--gold-500);outline-offset:2px}
.shot img{display:block;width:100%;height:150px;object-fit:cover}
.shot figcaption{
  padding:8px 11px;font-size:12px;color:var(--ink-mute);line-height:1.6;
  background:#fff;border-top:1px solid var(--line);
}

.lb{
  position:fixed;inset:0;z-index:320;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:14px;padding:34px 20px;
  background:rgba(6,26,58,.92);cursor:zoom-out;
  opacity:0;transition:opacity .18s var(--ease);
}
.lb[hidden]{display:none}
.lb.on{opacity:1}
.lb img{max-width:min(1100px,100%);max-height:80vh;object-fit:contain;
  border-radius:8px;box-shadow:var(--shadow-lg)}
.lb-cap{margin:0;color:#e8eef7;font-size:13.5px;letter-spacing:.04em;text-align:center}
.lb-x{
  position:absolute;top:18px;right:22px;width:40px;height:40px;
  display:grid;place-items:center;border:0;border-radius:50%;
  background:rgba(255,255,255,.12);color:#fff;font-size:26px;line-height:1;
  cursor:pointer;transition:background .2s var(--ease);
}
.lb-x:hover{background:rgba(255,255,255,.24)}
.lb-x:focus-visible{outline:2px solid var(--gold-400);outline-offset:2px}

@media (max-width:640px){
  .modal{padding:0}
  .modal-box{
    width:100%;max-height:100vh;height:100%;border-radius:0;
    padding:52px 20px 28px;
  }
  .modal-box h3{font-size:19px}
  .shot img{height:128px}
  .lb{padding:18px 12px}
  .lb-x{top:10px;right:12px}
}

@media (prefers-reduced-motion:reduce){
  .modal-back,.modal-box,.lb{transition:none}
  .modal-box{opacity:1;transform:none}
  .lb{opacity:1}
  .more-btn:hover,.shot:hover{transform:none}
}

/* 打印 */
@media print{
  .modal,.lb,.more-btn{display:none !important}
  .nav,.progress,.top,.scroll-cue,.hero-canvas,.hero-glow,.burger{display:none !important}
  body{color:#000}
  .hero{min-height:auto;background:#fff;color:#000}
  .hero-title,.hero-title b{color:#000;-webkit-text-fill-color:#000}
  .sec,.sec-alt,.sec-dark{background:#fff;color:#000;padding:24px 0;page-break-inside:avoid}
  .sec-dark .goal li,.sec-dark .lead{color:#000}
  .reveal{opacity:1;transform:none}
}