/* ====================================================================
   青科山海志 · QUST GUIDE — 设计系统 v2
   概念：海边大学的独立杂志。天蓝纸底 + 深海蓝 + 日落珊瑚 / 海玻璃青 / 沙金 / 松绿
   字体：Geist / Geist Mono（拉丁与数字）+ Noto Sans SC（中文），非阻塞加载
   ==================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#0E2A44;          /* 深海蓝（文字与深色块） */
  --ink-2:#1B3D5F;
  --ink-3:#2A5579;
  --sky:#1387C0;          /* 晴空海蓝 */
  --sky-l:#6FC3E8;        /* 浅海蓝 */
  --sky-d:#0E6A9E;        /* 深海蓝 */
  --paper:#FAEDD1;        /* 奶油米白 */
  --paper-2:#F2E0BD;
  --surface:#FDF7EA;
  --surface-2:#F8EED8;
  --line:rgba(14,42,68,.14);
  --line-soft:rgba(14,42,68,.08);
  --line-ink:rgba(234,244,251,.18);
  --muted:#5A7186;
  --muted-2:#8BA3B8;
  --coral:#F4520D; /* 暖橙光 */
  --cyan:#25A8B5;
  --amber:#E0A32E;
  --pine:#3E7A5C;

  --font-sans:"Geist","Noto Sans SC","PingFang SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"Geist Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --fs-display:clamp(3.1rem,7.2vw,7.4rem);
  --fs-h1:clamp(2.2rem,4.6vw,4.4rem);
  --fs-h2:clamp(1.7rem,3.2vw,2.9rem);
  --fs-lead:clamp(1.05rem,1.4vw,1.25rem);

  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:72px;
  --r-sm:2px; --r:4px; --r-lg:8px;

  --sh-1:0 1px 2px rgba(14,42,68,.06);
  --sh-2:0 12px 32px rgba(14,42,68,.10);
  --sh-3:0 24px 64px rgba(14,42,68,.16);

  --ease:cubic-bezier(.25,1,.5,1);
  --ease-in:cubic-bezier(.16,1,.3,1);
  --nav-h:68px;
}

/* ---------- 2. 重置与全局 ---------- */
*,*::before,*::after{box-sizing:border-box}
/* scrollbar-gutter:stable —— 始终为滚动条保留槽位。
   否则内容高度变化（切页、列表筛选、弹窗）导致滚动条出现/消失时，
   视口可用宽度会突变，整页内容横向跳动一下。 */
html{scroll-behavior:smooth;scrollbar-color:var(--sky) var(--paper-2);scrollbar-gutter:stable}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--paper-2)}
::-webkit-scrollbar-thumb{background:var(--sky);border-radius:99px;border:2px solid var(--paper-2)}
::-webkit-scrollbar-thumb:hover{background:var(--sky-d)}
input,textarea{caret-color:var(--sky-d)}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font-sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  /* iOS 关键修复：优先用 clip 而非 hidden。
     按 CSS 规范，overflow-x:hidden 且 overflow-y:visible 时，overflow-y 会被计算为 auto，
     body 随之变成滚动容器 → iOS Safari 上 position:fixed 导航栏定位错乱、
     backdrop-filter 采样失效（背景不绘制，身后内容直接透出）。
     overflow:clip 同样裁剪横向溢出，但不创建滚动容器，从根上避免该问题。
     保留 hidden 作为不支持 clip 的旧版浏览器兜底。 */
  overflow-x:hidden;
  overflow-x:clip;
}
body::after{ /* 颗粒噪点 */
  content:"";position:fixed;inset:0;z-index:2147483000;pointer-events:none;
  opacity:.05;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
::selection{background:rgba(19,135,192,.28)}
:focus-visible{outline:2px solid var(--sky);outline-offset:3px;border-radius:var(--r-sm)}
h1,h2,h3,h4{line-height:1.18;text-wrap:balance;font-weight:650}
[data-split],.hero-title{text-wrap:auto}
p{text-wrap:pretty}
.num{font-family:var(--font-mono);font-feature-settings:"tnum" 1;font-variant-numeric:tabular-nums;letter-spacing:-.02em}

.wrap{max-width:1200px;margin:0 auto;padding:0 var(--sp-5)}
.wrap-wide{max-width:1400px;margin:0 auto;padding:0 var(--sp-5)}

/* 章节节奏：电影式分章 */
.sec{padding:var(--sp-8) 0}
@media(max-width:960px){.sec{padding:var(--sp-7) 0}}

/* ---------- 3. 排版构件 ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted);
}
.kicker::before{content:"";width:34px;height:1px;background:var(--sky)}
.kicker.on-dark{color:rgba(234,244,251,.6)}
.kicker.on-dark::before{background:rgba(234,244,251,.5)}

.disp{
  font-size:var(--fs-display);font-weight:700;letter-spacing:-.035em;
  line-height:1.02;margin:var(--sp-4) 0 0;
}
.h1{font-size:var(--fs-h1);font-weight:700;letter-spacing:-.028em;line-height:1.08;margin:0}
.h2{font-size:var(--fs-h2);font-weight:700;letter-spacing:-.02em;line-height:1.12;margin:0}
.lead{font-size:var(--fs-lead);color:var(--muted);line-height:1.8}
.ghost-num{ /* 描边大字数字，杂志式 */
  font-family:var(--font-mono);font-weight:700;font-size:clamp(4rem,10vw,9rem);
  line-height:.9;letter-spacing:-.04em;color:transparent;
  -webkit-text-stroke:1.5px rgba(19,135,192,.45);
  user-select:none;
}
.ghost-num.on-dark{-webkit-text-stroke:1.5px rgba(234,244,251,.4)}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 26px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:.92rem;font-weight:600;letter-spacing:.02em;line-height:1;
  transition:transform .5s var(--ease),background-color .3s,border-color .3s,color .3s;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn .arr{font-family:var(--font-mono);transition:transform .5s var(--ease)}
.btn:hover .arr{transform:translateX(5px)}
.btn-primary{background:var(--sky-d);color:#fff;border-color:var(--sky-d)}
.btn-primary:hover{background:var(--ink);border-color:var(--ink);transform:translateY(-2px)}
.btn-coral{background:var(--coral);color:#fff}
.btn-coral:hover{background:var(--ink)}
.btn-paper{background:#fff;color:var(--ink);border-color:rgba(234,244,251,.5)}
.btn-paper:hover{background:#fff;transform:translateY(-2px)}
.btn-ink{background:var(--sky-d);color:#fff;border-color:var(--sky-d)}
.btn-ink:hover{background:var(--sky-d);border-color:var(--sky-d);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn-lg{padding:18px 40px;font-size:1rem}
.btn-sm{padding:9px 18px;font-size:.85rem}

/* ---------- 5. 导航 ---------- */
.site-nav{
  position:fixed;top:0;left:0;right:0;z-index:900;height:var(--nav-h);
  transition:background-color .4s,box-shadow .4s,border-color .4s,transform .5s var(--ease);
  border-bottom:1px solid transparent;
}
.site-nav.scrolled{
  background:rgba(234,244,251,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line-soft);box-shadow:0 1px 0 rgba(14,42,68,.03);
}
.nav-inner{
  max-width:1400px;margin:0 auto;height:100%;padding:0 var(--sp-5);
  display:flex;align-items:center;gap:var(--sp-5);
}
.nav-brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:auto;height:34px;border-radius:var(--r-sm);
  display:grid;place-items:center;flex-shrink:0;overflow:hidden;
}
.brand-mark svg{width:18px;height:18px}
.brand-logo{height:27px;width:auto;display:block}
.brand-mark.mark-fallback{width:34px;background:var(--sky-d);color:#fff}
.brand-name{font-weight:700;letter-spacing:.01em;font-size:1.02rem;line-height:1.1}
.brand-name small{display:block;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.28em;color:var(--muted);font-weight:500}
.nav-links{
  display:flex;gap:2px;margin-left:auto;
}
.nav-links a{
  padding:9px 14px;font-size:.92rem;font-weight:500;color:var(--ink-2);
  border-radius:var(--r-sm);position:relative;
  transition:background-color .3s,color .3s;
}
.nav-links a:hover{background:rgba(14,42,68,.05)}
.nav-links a.active{color:var(--sky);font-weight:650}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--sky);
}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:var(--sp-3)}
.nav-burger{
  display:none;width:40px;height:40px;border:1px solid var(--line);background:transparent;border-radius:var(--r-sm);
  flex-direction:column;gap:5px;align-items:center;justify-content:center;
}
.nav-burger span{width:18px;height:1.5px;background:var(--ink);transition:transform .3s,opacity .3s}
body.nav-open .nav-burger span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
body.nav-open .nav-burger span:nth-child(2){opacity:0}
body.nav-open .nav-burger span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mobile-drawer{
  display:none;position:fixed;top:var(--nav-h);left:0;right:0;z-index:890;
  background:var(--paper);border-bottom:1px solid var(--line);
  padding:var(--sp-5);flex-direction:column;gap:4px;
  transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:transform .4s var(--ease),opacity .3s;
}
body.nav-open .mobile-drawer{transform:none;opacity:1;pointer-events:auto}
.mobile-drawer a{padding:14px 6px;font-size:1.05rem;font-weight:600;border-bottom:1px solid var(--line-soft)}
.mobile-drawer a.active{color:var(--coral)}

/* 浮于深蓝 Hero 之上的导航反白：首页与硕市生共用（两页 Hero 同为深蓝海面） */
body[data-page="index"] .site-nav:not(.scrolled) .nav-links a,
body[data-page="acm"] .site-nav:not(.scrolled) .nav-links a{color:rgba(255,255,255,.92)}
body[data-page="index"] .site-nav:not(.scrolled) .nav-links a:hover,
body[data-page="acm"] .site-nav:not(.scrolled) .nav-links a:hover{background:rgba(255,255,255,.12);color:#fff}
body[data-page="index"] .site-nav:not(.scrolled) .brand-name,
body[data-page="acm"] .site-nav:not(.scrolled) .brand-name{color:#fff}
body[data-page="index"] .site-nav:not(.scrolled) .brand-name small,
body[data-page="acm"] .site-nav:not(.scrolled) .brand-name small{color:rgba(255,255,255,.62)}
body[data-page="index"] .site-nav:not(.scrolled) .nav-burger,
body[data-page="acm"] .site-nav:not(.scrolled) .nav-burger{border-color:rgba(255,255,255,.55)}
body[data-page="index"] .site-nav:not(.scrolled) .nav-burger span,
body[data-page="acm"] .site-nav:not(.scrolled) .nav-burger span{background:#fff}

/* 硕市生：顶部未滚动时也保留一条淡白分隔线，避免导航整块浮在深蓝里没有边界 */
body[data-page="acm"] .site-nav:not(.scrolled){border-bottom-color:rgba(255,255,255,.28)}

/* ---------- 6. 首页 Hero（Artistic Asymmetry） ---------- */
.hero{
  position:relative;padding:calc(var(--nav-h) + var(--sp-8)) 0 var(--sp-8);
  overflow:hidden;min-height:100vh;display:flex;flex-direction:column;justify-content:center;
  background:linear-gradient(163deg,var(--sky-d) 0%,var(--sky) 52%,var(--sky-l) 112%);
}
.hero-wash{ /* 天蓝上的光晕 */
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(60% 50% at 82% 22%, rgba(255,255,255,.18), transparent 62%),
    radial-gradient(46% 42% at 8% 88%, rgba(127,196,240,.3), transparent 60%),
    radial-gradient(70% 60% at 50% 110%, rgba(14,42,68,.16), transparent 70%);
}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:88px 88px;
  -webkit-mask-image:radial-gradient(75% 70% at 50% 35%,#000 20%,transparent 100%);
  mask-image:radial-gradient(75% 70% at 50% 35%,#000 20%,transparent 100%);
}
.hero-inner{position:relative;width:100%;display:grid;grid-template-columns:minmax(0,58%) minmax(0,42%);align-items:center;gap:var(--sp-7)}
.hero-copy{position:relative;z-index:2;padding-left:calc((100vw - 1400px)/2 + 24px);max-width:860px}
@media(max-width:1500px){.hero-copy{padding-left:var(--sp-5)}}
.hero-title{
  font-size:clamp(2.4rem,4.6vw,4.4rem); /* 四行排版：字号相应收敛，避免撑破首屏 */
  font-weight:700;letter-spacing:-.01em;line-height:1.18;margin:var(--sp-5) 0 0;
  max-width:960px;
}
.hero-title{color:#fff}
.hero-kicker{color:rgba(255,255,255,.78)}
.hero-kicker::before{background:rgba(255,255,255,.55)}
.hero-title .line + .line{margin-top:.14em}
.hero-title .hl{color:var(--coral)}
.hero-title .hl-cyan{color:var(--cyan)}
.hero-title em{font-style:normal;position:relative;white-space:nowrap}
.hero-title em:empty{display:none} /* SplitText 跨行复制产生的空壳不渲染下划线 */
.hero-title em::after{
  content:"";position:absolute;left:-2%;right:-2%;bottom:.08em;height:.16em;
  background:var(--amber);z-index:-1;transform:rotate(-1.2deg);border-radius:2px;
}
.hero-lead{margin:var(--sp-5) 0 0;font-size:var(--fs-lead);color:rgba(255,255,255,.85);max-width:520px}
.hero-ctas{display:flex;gap:var(--sp-4);margin-top:var(--sp-6);flex-wrap:wrap}
.hero-ctas .btn-primary{background:#fff;color:var(--sky-d);border-color:#fff}
.hero-ctas .btn-primary:hover{background:var(--ink);color:#fff;border-color:var(--ink);transform:translateY(-2px)}
.hero-foot{
  margin-top:var(--sp-7);display:flex;align-items:center;gap:var(--sp-5);flex-wrap:wrap;
}
.hero-coord{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.18em;color:rgba(255,255,255,.62);text-transform:uppercase}
.hero-partner{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.8rem;font-weight:600;color:#fff;letter-spacing:.02em;
  border-right:1px solid rgba(255,255,255,.35);padding-right:var(--sp-5);
}
.hero-partner img{height:24px;width:auto}
.about-logo{height:48px;width:auto;margin-bottom:var(--sp-4);display:block;border-radius:2px}
.cta-logo{height:54px;width:auto;margin:0 auto var(--sp-4);display:block;filter:drop-shadow(0 3px 14px rgba(0,0,0,.4))}
.hero-art{position:relative;z-index:1;height:min(66vh,640px)}
.hero-img-main{
  position:absolute;right:-6%;top:4%;width:min(88%,560px);aspect-ratio:4/3;overflow:hidden;
  border-radius:var(--r-lg);box-shadow:var(--sh-3);
  clip-path:inset(0 0 100% 0); /* 由 GSAP 揭开 */
}
.hero-img-main img{width:100%;height:100%;object-fit:cover;filter:none}
.hero-img-main::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 70%,rgba(0,0,0,.22))}
.hero-img-float{
  position:absolute;left:0;bottom:4%;width:min(44%,260px);aspect-ratio:1;overflow:hidden;
  border-radius:50%;border:6px solid rgba(255,255,255,.9);box-shadow:var(--sh-2);
}
.hero-img-float img{width:100%;height:100%;object-fit:cover;filter:none}
/* 图片缺失时的优雅兜底：渐变占位，避免出现裂图图标 */
.hero-img-main.img-fail,.hero-img-float.img-fail{background:linear-gradient(200deg,#d3e7f1,#f3e4c6)}
.hero-img-main.img-fail img,.hero-img-float.img-fail img{opacity:0}
.hero-img-tag{
  position:absolute;right:2%;bottom:-12px;background:#fff;color:var(--sky-d);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;
  padding:8px 14px;border-radius:var(--r-sm);box-shadow:var(--sh-2);
}
.hero-scroll{
  position:absolute;left:calc((100vw - 1400px)/2 + 24px);bottom:36px;z-index:3;
  display:flex;align-items:center;gap:12px;color:rgba(255,255,255,.7);
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;
}
@media(max-width:1500px){.hero-scroll{left:var(--sp-5)}}
.hero-scroll i{display:block;width:1px;height:44px;background:linear-gradient(#fff,transparent);animation:scrollPulse 2.2s var(--ease) infinite;transform-origin:top}
@keyframes scrollPulse{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}55%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- 7. 章节头 ---------- */
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,380px);gap:var(--sp-6);align-items:end;margin-bottom:var(--sp-7)}
.sec-head .h2{margin-top:var(--sp-4)}
.sec-head .lead{margin:0 0 4px}
.sec-head .right{justify-self:end;text-align:right}
.link-line{
  display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:.95rem;
  border-bottom:1px solid var(--sky-d);padding-bottom:4px;color:var(--sky-d);
}
.link-line .arr{font-family:var(--font-mono);transition:transform .5s var(--ease)}
.link-line:hover .arr{transform:translateX(6px)}

/* ---------- 8. 无缝 Bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);grid-auto-flow:dense;gap:var(--sp-4)}
.bento-cell{
  position:relative;background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:var(--sp-6);overflow:hidden;display:flex;flex-direction:column;min-height:220px;
  transition:transform .6s var(--ease),box-shadow .6s,border-color .4s;
}
.bento-cell:hover{transform:translateY(-6px);box-shadow:var(--sh-2);border-color:rgba(19,135,192,.45)}
.bento-cell .cell-num{
  position:absolute;top:var(--sp-5);right:var(--sp-6);font-family:var(--font-mono);
  font-size:.8rem;color:var(--muted-2);letter-spacing:.12em;
}
.bento-cell.dark{background:linear-gradient(150deg,var(--sky-d),var(--sky));color:#fff;border-color:var(--sky-d)}
.bento-cell.dark .kicker{color:rgba(234,244,251,.55)}
.bento-cell.dark .kicker::before{background:rgba(234,244,251,.5)}
.bento-cell.dark .muted{color:rgba(255,255,255,.72)}
.bento-cell.dark .stat .l{color:rgba(255,255,255,.72)}
.bento-cell.dark .stat .v .unit{color:rgba(255,255,255,.55)}
.cell-media{position:absolute;inset:0;z-index:0;border-radius:var(--r-lg);overflow:hidden}
.cell-media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease);filter:none}
.bento-cell:hover .cell-media img{transform:scale(1.06)}
/* 照片不加色罩：仅用中性黑底部渐变保证白字可读，避免整体泛蓝 */
.cell-media::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;background:linear-gradient(180deg,rgba(0,0,0,0) 48%,rgba(0,0,0,.45))}
/* 上半张照片完全保持原色，只在最底部文字区中性加暗，不用蓝色调；
   文字可读性主要靠白字双层投影，渐变仅作兜底，避免整张图发灰像加了滤镜 */
.cell-inkwash::after{background:linear-gradient(180deg,rgba(0,0,0,0) 52%,rgba(0,0,0,.55) 82%,rgba(0,0,0,.86) 100%)}
.bento-cell.media-cell{padding:0;justify-content:flex-end;min-height:300px}
.bento-cell.media-cell .cell-inner{position:relative;z-index:2;padding:var(--sp-6)}
/* 照片上的文字：统一纯白 + 双层投影，任何底图都清晰可读 */
.bento-cell.media-cell .cell-inner,
.bento-cell.media-cell .h3,
.bento-cell.media-cell .muted,
.bento-cell.media-cell .kicker,
.bento-cell.media-cell .cell-foot,
.bento-cell.media-cell .stat .l{color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.55),0 2px 14px rgba(0,0,0,.4)}
.bento-cell.media-cell .muted{color:rgba(255,255,255,.9)}
.bento-cell.media-cell .kicker{color:rgba(255,255,255,.85)}
.bento-cell.media-cell .kicker::before{background:rgba(255,255,255,.6)}
.bento-cell.media-cell .stat .v .unit{color:rgba(255,255,255,.75)}
.bento-cell .h3{font-size:1.5rem;font-weight:700;letter-spacing:-.02em;margin:var(--sp-4) 0 var(--sp-3);line-height:1.2}
.bento-cell .muted{color:var(--muted);font-size:.95rem;line-height:1.7;margin:0}
.cell-foot{margin-top:auto;padding-top:var(--sp-5)}
.stat-row{display:flex;gap:var(--sp-6);margin-top:var(--sp-5)}
.stat .v{font-family:var(--font-mono);font-size:2.2rem;font-weight:700;letter-spacing:-.03em;line-height:1}
.stat .v .unit{font-size:1rem;color:var(--muted-2);margin-left:2px}
.stat .l{font-size:.8rem;color:var(--muted);margin-top:6px;letter-spacing:.04em}
.cover-fallback{ /* 无图时的色块封面 */
  position:absolute;inset:0;border-radius:var(--r-lg);
  background:radial-gradient(90% 90% at 20% 15%,var(--acc,var(--coral)),transparent 55%),var(--ink);
  opacity:.9;
}
.bento .span-7{grid-column:span 7}.bento .span-5{grid-column:span 5}
.bento .span-8{grid-column:span 8}.bento .span-4{grid-column:span 4}
.bento .span-6{grid-column:span 6}.bento .span-12{grid-column:span 12}
.bento .row-2{grid-row:span 2}

/* ---------- 9. 钉住分栏（GSAP Split Pin） ---------- */
.split-pin{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:var(--sp-7)}
.pin-col{position:relative} /* 网格项默认撑满整行，给内层 sticky 提供完整高度 */
.pin-col-inner{position:sticky;top:calc(var(--nav-h) + 10px)} /* 始终紧挨顶部（导航栏下） */
.pin-drift{will-change:transform}
.pin-title{font-size:clamp(2rem,3.6vw,3.4rem);font-weight:700;letter-spacing:-.03em;line-height:1.1;margin:var(--sp-4) 0 0}
.pin-col .lead{margin-top:var(--sp-5)}
.pin-progress{width:100%;height:2px;background:var(--line);margin-top:var(--sp-5);overflow:hidden}
.pin-progress i{display:block;height:100%;width:100%;background:var(--sky);transform:scaleX(0);transform-origin:left}
.gallery-col{columns:2;column-gap:var(--sp-4)}
.gallery-item{
  display:flex;flex-direction:column;break-inside:avoid;margin-bottom:var(--sp-4);
  background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  overflow:hidden;transition:border-color .4s;
}
.gallery-item:hover{border-color:rgba(19,135,192,.45)}
.gallery-media{position:relative;overflow:hidden;aspect-ratio:4/3;flex-shrink:0}
.gallery-item:nth-child(3n) .gallery-media{aspect-ratio:4/5}
.gallery-item:nth-child(4n) .gallery-media{aspect-ratio:16/10}
.gallery-media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;filter:none;transition:transform 1.1s var(--ease)}
.gallery-item:hover .gallery-media img{transform:scale(1.07)}
.gallery-media .fallback{position:absolute;inset:0;background:radial-gradient(80% 80% at 30% 20%,var(--acc,var(--cyan)),transparent 60%),var(--ink-2)}
.gallery-body{padding:var(--sp-4) var(--sp-5) var(--sp-5)}
.gallery-body .g-cat{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--acc,var(--cyan))}
.gallery-body h3{margin:8px 0 6px;font-size:1.22rem;font-weight:700;letter-spacing:-.01em}
.gallery-body p{margin:0;color:var(--muted);font-size:.92rem;line-height:1.7}
.gallery-body .g-meta{margin-top:12px;display:flex;gap:14px;font-family:var(--font-mono);font-size:.74rem;color:var(--muted-2)}

/* ---------- 10. 卡片堆叠（Card Stacking） ---------- */
.stack-sec{position:relative}
.stack-item{position:sticky;top:calc(var(--nav-h) + 24px);margin-bottom:var(--sp-5)}
.stack-card{
  background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:var(--sp-6) var(--sp-7);display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,300px);
  gap:var(--sp-6);align-items:center;box-shadow:var(--sh-2);overflow:hidden;position:relative;
}
.stack-card .stack-idx{
  position:absolute;top:-14px;right:var(--sp-5);font-family:var(--font-mono);font-weight:700;
  font-size:7rem;color:transparent;-webkit-text-stroke:1px rgba(14,42,68,.14);line-height:1;user-select:none;
}
.stack-card h3{font-size:clamp(1.3rem,2.2vw,1.9rem);font-weight:700;letter-spacing:-.02em;margin:0 0 var(--sp-3)}
.stack-card .stack-meta{display:flex;gap:16px;flex-wrap:wrap;font-family:var(--font-mono);font-size:.76rem;color:var(--muted-2);margin-bottom:var(--sp-3)}
.stack-card p{margin:0;color:var(--muted);font-size:.96rem}
.stack-media{border-radius:var(--r);overflow:hidden;aspect-ratio:16/11;position:relative}
.stack-media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;filter:none}
.stack-media .fallback{position:absolute;inset:0;background:radial-gradient(80% 80% at 30% 20%,var(--acc,var(--coral)),transparent 60%),var(--ink-2)}

/* ---------- 11. 行内图打字（Inline Typography Images） ---------- */
.type-inline{font-size:clamp(2rem,4.4vw,3.9rem);font-weight:700;letter-spacing:-.03em;line-height:1.3}
.type-inline .t-img{
  display:inline-block;width:clamp(64px,8vw,120px);height:clamp(30px,3.6vw,54px);
  border-radius:999px;background-size:cover;background-position:center;
  vertical-align:middle;margin:0 .12em;border:1px solid var(--line-soft);
  transform:scale(.5);opacity:0; /* GSAP 揭示 */
}
.type-inline .t-img.bg-1{background-color:var(--coral)}
.type-inline .t-img.bg-2{background-color:var(--cyan)}
.type-inline .t-img.bg-3{background-color:var(--amber)}
.type-inline .t-line{display:block}

/* ---------- 11b. 山海三件事 + 青科地图（可点击放大） ---------- */
.type-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:var(--sp-8);align-items:center}
.type-copy{min-width:0}
.type-map{position:relative;min-width:0}
/* 地图标题（置于地图上方） */
.map-title{
  margin:0 0 var(--sp-3);font-size:.86rem;font-weight:600;letter-spacing:.16em;
  color:rgba(255,255,255,.88);
}
.map-ph{
  position:relative;display:block;width:100%;aspect-ratio:4/3;border-radius:var(--r-lg);overflow:hidden;
  padding:0;margin:0;font:inherit;color:inherit;cursor:zoom-in;
  border:1px solid rgba(255,255,255,.18);
  background:
    radial-gradient(120% 90% at 72% 16%,rgba(244,162,107,.22),transparent 55%),
    radial-gradient(90% 80% at 20% 84%,rgba(43,143,192,.24),transparent 60%),
    repeating-linear-gradient(0deg,transparent 0 27px,rgba(255,255,255,.06) 27px 28px),
    repeating-linear-gradient(90deg,transparent 0 27px,rgba(255,255,255,.06) 27px 28px),
    linear-gradient(160deg,#0E5A82,#0A2A3A);
  transition:border-color .35s var(--ease),box-shadow .35s var(--ease);
}
.map-ph:hover,.map-ph:focus-visible{
  border-color:rgba(255,255,255,.42);
  box-shadow:0 14px 40px rgba(4,26,38,.34);
}
.map-ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
/* 右下角「点击放大」提示 */
.map-zoom{
  position:absolute;right:12px;bottom:12px;display:inline-flex;align-items:center;gap:6px;
  font-size:.76rem;letter-spacing:.02em;color:rgba(255,255,255,.9);
  background:rgba(10,42,58,.55);backdrop-filter:blur(4px);
  padding:6px 11px;border-radius:999px;border:1px solid rgba(255,255,255,.16);
  transition:background .3s var(--ease);
}
.map-zoom svg{width:15px;height:15px;display:block}
.map-zoom i{font-style:normal;line-height:1}
.map-ph:hover .map-zoom{background:rgba(10,42,58,.78)}
@media (max-width:860px){
  .type-grid{grid-template-columns:1fr;gap:var(--sp-6);align-items:start}
  .type-map{order:-1}
}

/* ---------- 12. 横向手风琴（Horizontal Accordions） ---------- */
.h-acc{display:flex;gap:var(--sp-3);height:460px}
.h-acc-item{
  position:relative;flex:1;overflow:hidden;border-radius:var(--r-lg);cursor:pointer;
  background:var(--surface);border:1px solid var(--line-soft);
  transition:flex .8s var(--ease);display:flex;align-items:flex-end;
}
.h-acc-item.open{flex:4.2}
.h-acc-item .acc-num{
  position:absolute;top:var(--sp-4);left:var(--sp-5);font-family:var(--font-mono);
  font-size:.8rem;letter-spacing:.16em;color:var(--muted);z-index:2;
}
.h-acc-item .acc-bg{position:absolute;inset:0;z-index:0;opacity:0;transition:opacity .7s}
.h-acc-item .acc-bg img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;filter:none}
.h-acc-item .acc-bg::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;background:linear-gradient(200deg,rgba(0,0,0,0),rgba(0,0,0,.5))}
.h-acc-item.open .acc-bg{opacity:1}
.h-acc-item .acc-bg .fallback{position:absolute;inset:0;background:radial-gradient(80% 80% at 25% 20%,var(--acc),transparent 60%),var(--ink-2)}
.acc-title{
  position:relative;z-index:2;padding:var(--sp-5) var(--sp-6);
  writing-mode:vertical-rl;
  font-size:1.15rem;font-weight:700;letter-spacing:.06em;color:var(--ink);
  transition:color .5s,writing-mode 0s,transform .8s var(--ease);
  white-space:nowrap;height:calc(100% - 24px);
}
.h-acc-item.open .acc-title{writing-mode:horizontal-tb;transform:none;color:#F8FCFE;font-size:1.7rem;padding:var(--sp-6)}
.acc-body{
  position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;justify-content:flex-end;
  padding:var(--sp-6);opacity:0;transform:translateY(16px);transition:opacity .6s .15s,transform .7s .1s var(--ease);pointer-events:none;
}
.h-acc-item.open .acc-body{opacity:1;transform:none;pointer-events:auto}
.acc-body p{color:rgba(234,244,251,.85);font-size:.92rem;margin:0 0 var(--sp-4);max-width:420px}
.acc-body .btn{margin-top:var(--sp-2)}

/* ---------- 13. 评价轮播（Testimonial Carousel） ---------- */
.voices{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:var(--sp-7);align-items:center}
.voice-stage{position:relative;min-height:300px}
.voice-slide{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;
  opacity:0;visibility:hidden;pointer-events:none;
}
.voice-slide.active{opacity:1;visibility:visible;pointer-events:auto}
.voice-mark{font-family:var(--font-mono);font-size:4rem;line-height:.6;color:var(--coral);opacity:.9}
.voice-quote{font-size:clamp(1.3rem,2.3vw,1.9rem);font-weight:650;letter-spacing:-.015em;line-height:1.5;margin:var(--sp-5) 0 var(--sp-5)}
.voice-who{display:flex;align-items:center;gap:var(--sp-3)}
.voice-who b{display:block;font-size:.98rem}
.voice-who span{font-size:.8rem;color:var(--muted)}
.voice-portraits{display:flex;justify-content:flex-end;flex-wrap:wrap}
.voice-avatar{
  width:86px;height:86px;border-radius:50%;border:4px solid var(--paper);overflow:hidden;
  margin-left:-26px;position:relative;transition:transform .5s var(--ease),opacity .4s;cursor:pointer;
  box-shadow:var(--sh-1);
}
.voice-avatar:first-child{margin-left:0}
.voice-avatar:hover{transform:translateY(-6px)}
.voice-avatar img{width:100%;height:100%;object-fit:cover;filter:none}
.voice-avatar .ini{
  position:absolute;inset:0;display:grid;place-items:center;font-weight:700;color:#F8FCFE;
  background:var(--ink);font-size:1.3rem;
}
.voice-avatar.current{border-color:var(--sky);transform:scale(1.08)}
.voice-nav{display:flex;gap:var(--sp-3);margin-top:var(--sp-6)}
.voice-btn{
  width:46px;height:46px;border:1px solid var(--line);border-radius:50%;background:transparent;
  display:grid;place-items:center;transition:background-color .3s,border-color .3s,transform .3s;
}
.voice-btn:hover{background:var(--ink);border-color:var(--ink);color:#F8FCFE;transform:translateY(-2px)}
.voice-btn svg{width:17px;height:17px}

/* ---------- 14. 列表页 ---------- */
.list-hero{padding:calc(var(--nav-h) + var(--sp-7)) 0 var(--sp-6);position:relative;overflow:hidden;
  background:linear-gradient(173deg,var(--acc-soft,rgba(127,196,240,.16)),transparent 58%)}
.list-hero .wash{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(50% 60% at 80% 10%,var(--acc-soft,transparent),transparent 65%)}
.list-title{font-size:clamp(2.6rem,5.6vw,5rem);font-weight:700;letter-spacing:-.035em;line-height:1.03;margin:var(--sp-3) 0 0}
.list-title .cnt{color:var(--acc,var(--coral));font-family:var(--font-mono)}
.list-desc{margin-top:var(--sp-4);color:var(--muted);font-size:var(--fs-lead);max-width:600px}
.filter-bar{display:flex;align-items:center;gap:var(--sp-3);flex-wrap:wrap;margin:var(--sp-6) 0 var(--sp-7)}
.filter-pill{
  padding:9px 20px;border-radius:999px;border:1px solid var(--line);background:transparent;
  font-size:.88rem;font-weight:500;color:var(--ink-2);transition:all .35s;
}
.filter-pill:hover{border-color:var(--sky);transform:translateY(-1px)}
.filter-pill.on{background:var(--sky);border-color:var(--sky);color:#fff}
.search-box{
  margin-left:auto;display:flex;align-items:center;gap:10px;
  border:1px solid var(--line);border-radius:999px;padding:0 18px;height:44px;min-width:240px;
  background:var(--surface);transition:border-color .3s,box-shadow .3s;
}
.search-box:focus-within{border-color:var(--sky);box-shadow:0 0 0 3px rgba(19,135,192,.14)}
.search-box svg{width:16px;height:16px;color:var(--muted);flex-shrink:0}
.search-box input{border:none;outline:none;background:transparent;font-family:inherit;font-size:.92rem;color:var(--ink);width:100%}
.count-line{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--sp-5)}
.card{
  background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);overflow:hidden;
  display:flex;flex-direction:column;position:relative;
  transition:transform .6s var(--ease),box-shadow .6s,border-color .4s;
}
.card:hover{transform:translateY(-8px);box-shadow:var(--sh-2);border-color:rgba(19,135,192,.45)}
.card-cover{position:relative;aspect-ratio:16/10;overflow:hidden}
.card-cover .fallback{
  position:absolute;inset:0;background:radial-gradient(90% 90% at 22% 14%,var(--acc),transparent 58%),var(--ink-2);
}
.card-cover img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;filter:none;transition:transform 1.2s var(--ease)}
.card:hover .card-cover img{transform:scale(1.07)}
.card-cover .cover-tint{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 62%,rgba(0,0,0,.3));pointer-events:none}
.pin-badge{
  position:absolute;top:14px;left:14px;z-index:2;background:var(--paper);color:var(--ink);
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;
  padding:5px 10px;border-radius:var(--r-sm);display:flex;align-items:center;gap:6px;
}
.pin-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--coral)}
.cat-chip{
  position:absolute;top:14px;right:14px;z-index:2;background:rgba(14,42,68,.72);color:#F8FCFE;
  font-size:.74rem;padding:5px 12px;border-radius:999px;backdrop-filter:blur(4px);
}
.card-body{padding:var(--sp-5);display:flex;flex-direction:column;flex:1}
.card-body h3{margin:0 0 8px;font-size:1.18rem;font-weight:700;letter-spacing:-.01em;line-height:1.35}
.card-body .ex{margin:0;color:var(--muted);font-size:.9rem;line-height:1.7;flex:1}
.card-meta{
  margin-top:var(--sp-4);display:flex;gap:14px;flex-wrap:wrap;align-items:center;
  font-family:var(--font-mono);font-size:.76rem;color:var(--muted-2);border-top:1px solid var(--line-soft);padding-top:var(--sp-3);
}
.card-meta .rate{color:var(--coral);font-weight:700}
.card-tags{margin-top:var(--sp-3);display:flex;gap:6px;flex-wrap:wrap}
.tag{
  font-size:.72rem;color:var(--muted);border:1px solid var(--line-soft);border-radius:999px;padding:3px 10px;
}
.empty-state{
  text-align:center;padding:var(--sp-8) var(--sp-5);border:1px dashed var(--line);border-radius:var(--r-lg);
}
.empty-state .es-art{font-family:var(--font-mono);font-size:3rem;color:var(--muted-2);line-height:1;margin-bottom:var(--sp-4)}
.empty-state h3{margin:0 0 8px;font-size:1.2rem}
.empty-state p{color:var(--muted);margin:0 0 var(--sp-5);font-size:.95rem}

/* ---------- 14b. 硕市生（社团活动） ---------- */
/* 晴空海蓝 #1387C0 打底，暖橙光 #F4520D 作唯一强调色，奶油米白 #FAEDD1 作纸面 */
body[data-page="acm"]{--acc:#1387C0;--acc-soft:rgba(19,135,192,.12)}

/* Hero：深蓝海面，与首页同一套语言但更紧凑，暖橙只留一处作强调 */
.acm-hero{
  position:relative;overflow:hidden;color:#fff;
  padding:calc(var(--nav-h) + var(--sp-8)) 0 var(--sp-8);
  background:linear-gradient(155deg,var(--sky-d) 0%,var(--sky) 68%,var(--sky-l) 132%);
}
.acm-hero .wash{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(58% 48% at 84% 18%,rgba(255,255,255,.16),transparent 62%),
    radial-gradient(46% 44% at 10% 92%,rgba(244,82,13,.16),transparent 60%);
}
.acm-hero .wrap{position:relative}
.acm-hero .kicker{color:rgba(255,255,255,.82)}
.acm-hero .kicker::before{background:rgba(255,255,255,.6)}
.acm-hero-title{
  font-size:clamp(2.5rem,5.2vw,4.4rem);font-weight:700;line-height:1.12;
  letter-spacing:-.035em;margin:var(--sp-5) 0 0;max-width:15ch;
  text-wrap:balance;
}
.acm-hero-title em{
  font-style:normal;color:var(--coral);position:relative;white-space:nowrap;
}
.acm-hero-lead{
  margin:var(--sp-5) 0 0;font-size:var(--fs-lead);line-height:1.8;
  color:rgba(255,255,255,.88);max-width:58ch;
}
.acm-hero-actions{display:flex;gap:var(--sp-4);flex-wrap:wrap;margin-top:var(--sp-6)}

/* 四大方向：编号用描边大字，hover 才填充——克制但有存在感 */
.acm-pillars{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:var(--sp-6) var(--sp-7);margin-top:var(--sp-7);
}
.pillar{padding-top:var(--sp-5);border-top:1px solid var(--line)}
.pillar .pn{
  display:block;font-family:var(--font-mono);font-weight:700;line-height:1;
  font-size:clamp(2.8rem,4.6vw,3.8rem);letter-spacing:-.05em;
  color:transparent;-webkit-text-stroke:1.5px var(--coral);
  transition:color .45s var(--ease,cubic-bezier(.25,1,.5,1));
}
.pillar:hover .pn{color:var(--coral)}
.pillar h3{margin:var(--sp-4) 0 6px;font-size:1.14rem;color:var(--ink);letter-spacing:-.01em}
.pillar p{margin:0;color:var(--muted);font-size:.92rem;max-width:36ch}

/* 活动天然按时间排序，行式列表比卡片网格更利于扫读日期与报名状态 */
/* 活动现场：公告板（置顶主推 feature + 紧凑卡，12 列无缝网格，末行自动补满） */
.ac-board{display:grid;grid-template-columns:repeat(12,1fr);grid-auto-flow:dense;gap:var(--sp-4);margin-top:var(--sp-6)}
.ac-feature{
  grid-column:span 8;grid-row:span 2;position:relative;overflow:hidden;
  background:linear-gradient(155deg,var(--sky-d) 0%,var(--sky) 70%,var(--sky-l) 120%);
  color:#fff;border-radius:var(--r-lg);padding:var(--sp-6) var(--sp-7);
  display:flex;flex-direction:column;min-height:430px;
  transition:transform .6s var(--ease),box-shadow .6s;
}
.ac-feature:hover{transform:translateY(-5px);box-shadow:var(--sh-2)}
.ac-feature.full{grid-column:span 12}
.ac-feature .wash{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(60% 60% at 85% 15%,rgba(255,255,255,.16),transparent 60%),
             radial-gradient(50% 60% at 5% 100%,rgba(244,82,13,.20),transparent 65%)}
.ac-feature>*{position:relative}
.ac-cat{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;color:var(--acc)}
.ac-feature .ac-cat{color:rgba(255,255,255,.75)}
.ac-date-hero{margin:var(--sp-5) 0 0;line-height:1}
.ac-date-hero .m{font-family:var(--font-mono);font-size:.85rem;letter-spacing:.3em;color:var(--coral)}
.ac-date-hero .d{font-family:var(--font-mono);font-weight:800;font-size:clamp(3.4rem,5.6vw,5rem);line-height:1;letter-spacing:-.04em;margin-top:3px}
.ac-feature h3{margin:var(--sp-4) 0 var(--sp-3);font-size:clamp(1.45rem,2.5vw,2.1rem);letter-spacing:-.02em;line-height:1.22}
.ac-feature .ac-ex{color:rgba(255,255,255,.82);font-size:.98rem;max-width:54ch;margin:0;line-height:1.8}
.ac-meta{display:flex;flex-wrap:wrap;gap:6px var(--sp-4);margin-top:var(--sp-4);font-size:.8rem;color:var(--muted)}
.ac-meta span{display:inline-flex;align-items:center;gap:5px}
.ac-meta b{color:var(--ink);font-weight:500}
.ac-feature .ac-meta{
  margin-top:auto;padding-top:var(--sp-4);border-top:1px solid rgba(255,255,255,.25);
  color:rgba(255,255,255,.62);
}
.ac-feature .ac-meta b{color:#fff}
.ac-card{
  grid-column:span 4;background:var(--surface);border:1px solid var(--line-soft);
  border-radius:var(--r-lg);padding:var(--sp-5);display:flex;flex-direction:column;min-height:232px;
  transition:transform .5s var(--ease),border-color .35s;
}
.ac-card:hover{transform:translateY(-4px);border-color:rgba(19,135,192,.45)}
.ac-card.wide{grid-column:span 12;flex-direction:row;align-items:center;gap:var(--sp-6);min-height:0}
.ac-card.wide .ac-main{flex:1}
.ac-card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--sp-3)}
.ac-date{display:flex;flex-direction:column;line-height:1}
.ac-date .m{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.2em;color:var(--acc)}
.ac-date .d{font-family:var(--font-mono);font-weight:800;font-size:2.1rem;letter-spacing:-.03em;color:var(--ink);margin-top:2px}
.ac-card h3{margin:0 0 var(--sp-2);font-size:1.15rem;line-height:1.35;letter-spacing:-.01em}
.ac-card .ac-ex{margin:0;color:var(--muted);font-size:.9rem;line-height:1.7;flex:1}
.ac-card .ac-meta{margin-top:var(--sp-4);padding-top:var(--sp-3);border-top:1px solid var(--line-soft)}
.ac-foot{display:flex;justify-content:space-between;align-items:center;margin-top:var(--sp-4);gap:var(--sp-3)}
.ac-arrow{font-family:var(--font-mono);font-size:1.05rem;transition:transform .45s var(--ease)}
.ac-card:hover .ac-arrow,.ac-feature:hover .ac-arrow{transform:translateX(6px)}
.ac-status{display:inline-flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:.74rem;letter-spacing:.06em}
.ac-status i{width:7px;height:7px;border-radius:50%;flex-shrink:0}
.ac-status.open{color:var(--coral)}
.ac-status.open i{background:var(--coral);box-shadow:0 0 0 3px rgba(244,82,13,.15)}
.ac-status.closed{color:var(--muted-2)}
.ac-status.closed i{border:1.5px solid currentColor;background:transparent}
.ac-feature .ac-status.closed{color:rgba(255,255,255,.55)}
.ac-pin{font-family:var(--font-mono);font-size:.66rem;color:var(--coral);border:1px solid rgba(244,82,13,.5);border-radius:999px;padding:2px 8px;white-space:nowrap}
@media(max-width:960px){
  .ac-feature{grid-column:span 12;min-height:380px}
  .ac-card,.ac-card.wide{grid-column:span 12 !important;flex-direction:column;align-items:flex-start;gap:0;min-height:0}
}

/* 社团理念：非对称双栏，右侧用带分隔线的要点列表，避免等高卡片堆叠 */
.acm-intro{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:var(--sp-8);align-items:start}
.acm-intro h2{margin:0 0 var(--sp-4);font-size:clamp(1.6rem,2.6vw,2.3rem);line-height:1.25;letter-spacing:-.02em}
.acm-intro p{color:var(--muted);margin:0;max-width:52ch}
.ac-tenets{list-style:none;margin:0;padding:0}
.ac-tenets li{
  padding:var(--sp-4) 0;border-top:1px solid var(--line);
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:var(--sp-4);align-items:baseline;
}
.ac-tenets li:last-child{border-bottom:1px solid var(--line)}
.ac-tenets .n{font-family:var(--font-mono);font-size:.78rem;color:var(--acc)}
.ac-tenets h4{margin:0 0 4px;font-size:1rem}
.ac-tenets p{margin:0;color:var(--muted);font-size:.9rem}

@media(max-width:820px){
  .ac-item{grid-template-columns:64px minmax(0,1fr);gap:var(--sp-4)}
  .ac-date{width:64px}
  .ac-date .d{font-size:1.4rem}
  .ac-side{grid-column:1 / -1;flex-direction:row;align-items:center;justify-content:flex-start;margin-top:6px}
  .acm-intro{grid-template-columns:1fr;gap:var(--sp-6)}
}

/* ---------- 15. 详情页 ---------- */
.art-hero{padding:calc(var(--nav-h) + var(--sp-7)) 0 var(--sp-6)}
.art-badge{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.72rem;
  letter-spacing:.18em;text-transform:uppercase;color:var(--acc,var(--coral));
}
.art-badge::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--acc,var(--coral))}
.art-title{font-size:clamp(2.1rem,4.6vw,4.2rem);font-weight:700;letter-spacing:-.03em;line-height:1.08;margin:var(--sp-4) 0 0;max-width:900px}
.art-meta-card{
  margin-top:var(--sp-6);display:flex;gap:var(--sp-6);flex-wrap:wrap;align-items:center;
  background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:var(--sp-4) var(--sp-5);
}
.art-meta-card .mi{font-family:var(--font-mono);font-size:.76rem;color:var(--muted);letter-spacing:.04em}
.art-meta-card .mi b{display:block;font-size:.92rem;color:var(--ink);letter-spacing:0}
.art-meta-card .mi .rate{color:var(--coral);font-family:var(--font-mono);font-size:1.1rem;font-weight:700}
.art-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:var(--sp-7);align-items:start}
.art-aside{position:sticky;top:calc(var(--nav-h) + 24px);display:flex;flex-direction:column;gap:var(--sp-4)}
.aside-box{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:var(--sp-5)}
.aside-box h4{margin:0 0 var(--sp-3);font-size:.8rem;font-family:var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.prose{font-size:1.02rem;line-height:1.95;color:var(--ink-2)}
.prose h4{margin:var(--sp-6) 0 var(--sp-3);font-size:1.25rem;color:var(--ink)}
.prose p{margin:var(--sp-3) 0}
.prose ul,.prose ol{margin:var(--sp-3) 0;padding-left:1.3em}
.prose li{margin:6px 0}
.prose li::marker{color:var(--coral)}
.prose strong{color:var(--ink);font-weight:700}
.prose blockquote{
  margin:var(--sp-5) 0;padding:var(--sp-4) var(--sp-5);border-left:3px solid var(--coral);
  background:var(--surface-2);border-radius:0 var(--r) var(--r) 0;color:var(--muted);
}
.prose table{width:100%;border-collapse:collapse;margin:var(--sp-5) 0;font-size:.9rem}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--surface-2);font-weight:650;white-space:nowrap}
.prose em{color:var(--muted)}
.art-prevnext{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-4);margin-top:var(--sp-7)}
.pn-card{
  background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:var(--sp-5);
  display:block;transition:transform .5s var(--ease),border-color .4s;
}
.pn-card:hover{transform:translateY(-4px);border-color:rgba(19,135,192,.45)}
.pn-card .dir{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted-2)}
.pn-card h3{margin:10px 0 0;font-size:1.05rem;font-weight:650;line-height:1.45}
.pn-card.next{text-align:right}

/* ---------- 16. 论坛 ---------- */
.forum-hero{padding:calc(var(--nav-h) + var(--sp-6)) 0 var(--sp-5)}
.forum-layout{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:var(--sp-6);align-items:start;padding-bottom:var(--sp-8)}
.forum-side{display:flex;flex-direction:column;gap:var(--sp-4);position:sticky;top:calc(var(--nav-h) + 24px)}
.side-box{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:var(--sp-5)}
.side-box h4{margin:0 0 var(--sp-3);font-size:.78rem;font-family:var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.board-link{
  display:flex;justify-content:space-between;align-items:center;padding:11px 4px;font-size:.95rem;
  border-bottom:1px solid var(--line-soft);transition:color .3s,padding-left .3s;
}
.board-link:last-child{border-bottom:none}
.board-link:hover{color:var(--sky);padding-left:8px}
.board-link .b-count{font-family:var(--font-mono);font-size:.74rem;color:var(--muted-2)}
.board-link.on{color:var(--sky);font-weight:650}
.hot-item{padding:10px 4px;border-bottom:1px solid var(--line-soft);display:flex;gap:10px;align-items:baseline}
.hot-item:last-child{border-bottom:none}
.hot-item .rank{font-family:var(--font-mono);font-weight:700;color:var(--coral);flex-shrink:0;width:18px}
.hot-item a{font-size:.88rem;line-height:1.5;color:var(--ink-2)}
.hot-item a:hover{color:var(--coral)}
.forum-main{display:flex;flex-direction:column;gap:var(--sp-4)}
.forum-toolbar{display:flex;gap:var(--sp-3);flex-wrap:wrap;align-items:center}
.forum-search{
  display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:999px;
  padding:0 16px;height:42px;background:var(--surface);flex:1;min-width:200px;max-width:380px;
}
.forum-search input{border:none;outline:none;background:transparent;font-family:inherit;font-size:.9rem;width:100%}
/* 排序条：左侧说明 + 胶囊切换 + 右侧总数。窄屏自动换行，总数独占一行右对齐。 */
.f-sortbar{display:flex;align-items:center;gap:var(--sp-3);flex-wrap:wrap}
.f-sortlabel{font-family:var(--font-mono);font-size:.72rem;color:var(--muted-2);flex-shrink:0}
.f-sortpills{display:flex;gap:6px;flex-wrap:wrap}
.f-sort{
  padding:5px 14px;border:1px solid var(--line);border-radius:999px;background:transparent;
  font-family:inherit;font-size:.82rem;color:var(--muted);cursor:pointer;line-height:1.6;
  transition:color .25s,border-color .25s,background .25s;
}
.f-sort:hover{color:var(--ink);border-color:var(--muted-2)}
.f-sort.on{color:#fff;background:var(--sky);border-color:var(--sky);font-weight:650}
.f-count{margin-left:auto;font-family:var(--font-mono);font-size:.74rem;color:var(--muted-2)}
.thread-row{
  background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:var(--sp-4) var(--sp-5);
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:var(--sp-3);align-items:center;
  transition:transform .4s var(--ease),border-color .3s;
  cursor:pointer;
}
.thread-row:hover{transform:translateX(4px);border-color:var(--line)}
.thread-row .t-title{font-weight:650;font-size:1.02rem;line-height:1.5;display:flex;gap:10px;align-items:center}
.thread-row .t-title .pin-mini{font-family:var(--font-mono);font-size:.62rem;color:var(--coral);border:1px solid var(--coral);border-radius:999px;padding:2px 8px;flex-shrink:0}
.thread-row .t-sub{display:flex;gap:14px;flex-wrap:wrap;font-family:var(--font-mono);font-size:.72rem;color:var(--muted-2);margin-top:8px}
.thread-row .t-stats{display:flex;gap:18px;text-align:center;font-family:var(--font-mono);font-size:.76rem;color:var(--muted-2)}
.thread-row .t-stats b{display:block;font-size:1.05rem;color:var(--ink)}
/* 列表尾部：加载更多按钮 / 已到底提示。两者互斥出现，不在同一屏。 */
.f-more{display:flex;justify-content:center;margin-top:var(--sp-5)}
.f-more .btn{min-width:160px}
.f-end{text-align:center;font-family:var(--font-mono);font-size:.76rem;color:var(--muted-2);margin:var(--sp-5) 0 0}
/* 可点元素统一手型指针：论坛帖子/热帖/板块筛选等非 <a>/<button> 的自定义可点元素
   靠属性选择器兜底，避免日后新增交互元素漏写 cursor 又退回箭头。 */
[data-open],[data-b],[data-del-reply],[role="button"]{cursor:pointer}
mark{background:rgba(244,82,13,.28);color:inherit;border-radius:2px;padding:0 2px}
.post-view{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);padding:var(--sp-6)}
.post-view .p-title{font-size:1.6rem;font-weight:700;letter-spacing:-.015em;margin:var(--sp-3) 0}
.post-view .p-body{color:var(--ink-2);line-height:1.9;white-space:pre-wrap;margin-top:var(--sp-4)}
.reply-list{margin-top:var(--sp-5);border-top:1px solid var(--line-soft);padding-top:var(--sp-4);display:flex;flex-direction:column;gap:var(--sp-4)}
.reply-item{display:flex;gap:var(--sp-3)}
.reply-ava{
  width:36px;height:36px;border-radius:50%;background:var(--sky-d);color:#fff;flex-shrink:0;
  display:grid;place-items:center;font-size:.85rem;font-weight:700;
}
.reply-main{flex:1}
.reply-main .r-meta{display:flex;gap:12px;align-items:baseline;font-family:var(--font-mono);font-size:.72rem;color:var(--muted-2)}
.reply-main .r-meta b{font-size:.9rem;color:var(--ink);font-family:var(--font-sans)}
.reply-main .r-text{margin-top:6px;font-size:.95rem;line-height:1.75}
.composer{margin-top:var(--sp-5);border-top:1px solid var(--line-soft);padding-top:var(--sp-4)}
.composer textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r);background:var(--surface-2);
  padding:var(--sp-3) var(--sp-4);font-family:inherit;font-size:.95rem;line-height:1.7;resize:vertical;min-height:88px;outline:none;
}
.composer textarea:focus{border-color:var(--ink)}
.composer .c-actions{display:flex;justify-content:flex-end;margin-top:var(--sp-3)}

/* ---------- 17. CTA / 页脚 ---------- */
.cta-sec{position:relative;background:linear-gradient(155deg,var(--sky-d) 0%,var(--sky) 78%,var(--sky-l) 130%);color:#fff;padding:var(--sp-8) 0;overflow:hidden;text-align:center}
.cta-sec .wash{
  position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(52% 60% at 50% 0%,rgba(244,82,13,.22),transparent 62%),
             radial-gradient(40% 50% at 85% 100%,rgba(37,168,181,.16),transparent 60%);
}
.cta-title{
  font-size:clamp(2.6rem,6.4vw,5.8rem);font-weight:700;letter-spacing:-.035em;line-height:1.02;
  margin:var(--sp-4) auto 0;max-width:1000px;
}
.cta-title .hl{color:var(--coral)}
.cta-sub{color:rgba(234,244,251,.62);max-width:560px;margin:var(--sp-5) auto 0}
.cta-actions{display:flex;gap:var(--sp-4);justify-content:center;margin-top:var(--sp-6);flex-wrap:wrap}
.site-footer{background:linear-gradient(160deg,var(--sky-d),#0A4D73);color:rgba(234,244,251,.78);padding:var(--sp-8) 0 var(--sp-6);border-top:1px solid var(--line-ink)}
.foot-grid{display:grid;grid-template-columns:2.2fr 1fr 1.4fr 1fr 1.2fr;gap:var(--sp-6);margin-bottom:var(--sp-7)}
.foot-wordmark{
  font-size:clamp(2rem,4vw,3.2rem);font-weight:700;letter-spacing:-.03em;color:#F8FCFE;
  line-height:1.05;margin:var(--sp-3) 0 var(--sp-4);
}
.foot-col h5{
  margin:0 0 var(--sp-4);font-family:var(--font-mono);font-size:.72rem;letter-spacing:.2em;
  text-transform:uppercase;color:rgba(234,244,251,.45);font-weight:500;
}
.foot-col a{display:block;padding:5px 0;font-size:.9rem;transition:color .3s,padding-left .3s}
.foot-col a:hover{color:var(--coral);padding-left:6px}
.foot-qr{width:96px;height:96px;border-radius:var(--r);background:#F8FCFE;padding:6px}
.foot-qr img{width:100%;height:100%;object-fit:contain}
.foot-qr-tip{font-size:.74rem;margin-top:10px;line-height:1.6}
.foot-bottom{
  border-top:1px solid var(--line-ink);padding-top:var(--sp-5);display:flex;gap:var(--sp-4);
  justify-content:space-between;flex-wrap:wrap;font-size:.8rem;
}
.foot-bottom .dim{color:rgba(234,244,251,.4)}
.foot-bottom a{color:rgba(234,244,251,.72)}
.foot-bottom a:hover{color:var(--coral)}

/* ---------- 18. 弹窗 / Toast / 灯箱 ---------- */
.modal-backdrop{
  position:fixed;inset:0;z-index:1200;background:rgba(14,42,68,.55);backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;padding:var(--sp-5);
  opacity:0;pointer-events:none;transition:opacity .35s;
}
.modal-backdrop.open{opacity:1;pointer-events:auto}
.modal{
  background:var(--paper);border-radius:var(--r-lg);max-width:520px;width:100%;max-height:88vh;overflow:auto;
  padding:var(--sp-6);position:relative;box-shadow:var(--sh-3);
  transform:translateY(18px) scale(.98);transition:transform .45s var(--ease);
}
.modal-backdrop.open .modal{transform:none}
.modal h3{margin:0 0 4px;font-size:1.4rem;letter-spacing:-.01em}
.modal .m-sub{color:var(--muted);font-size:.9rem;margin:0 0 var(--sp-5)}
.modal-close{
  position:absolute;top:var(--sp-4);right:var(--sp-4);width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);background:transparent;display:grid;place-items:center;color:var(--muted);
}
.modal-close:hover{background:var(--ink);color:#F8FCFE;border-color:var(--ink)}
.field{margin-bottom:var(--sp-4)}
.field label{display:block;font-size:.82rem;font-weight:600;margin-bottom:7px;letter-spacing:.02em}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);
  padding:11px 14px;font-family:inherit;font-size:.95rem;color:var(--ink);outline:none;
  transition:border-color .3s,box-shadow .3s;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--ink);box-shadow:0 0 0 3px rgba(14,42,68,.05)}
.field .hint{font-size:.76rem;color:var(--muted-2);margin-top:5px}
/* 密码框 + 右侧眼睛：容器负责相对定位，眼睛绝对居右 */
.field-pw{position:relative}
.field-pw input{padding-right:44px}
.pw-eye{
  position:absolute;top:50%;right:8px;transform:translateY(-50%);
  width:30px;height:30px;padding:0;border:none;border-radius:50%;
  background:transparent;color:var(--muted-2);cursor:pointer;
  display:grid;place-items:center;
  transition:color .2s,background-color .2s;
}
.pw-eye svg{width:18px;height:18px;display:block}
.pw-eye:hover{color:var(--ink);background:rgba(14,42,68,.06)}
.pw-eye:focus-visible{outline:2px solid var(--sky);outline-offset:2px}
.pw-eye.on{color:var(--sky)}
/* 字段级错误：就近显示在出错的输入框下方，替代顶部通栏提示 */
.field .f-err{font-size:.78rem;color:#B3382C;margin-top:6px;line-height:1.5}
.field input.is-bad,
.field select.is-bad,
.field textarea.is-bad{border-color:#D9513F;box-shadow:0 0 0 3px rgba(179,56,44,.1)}
.field input.is-bad:focus{border-color:#B3382C;box-shadow:0 0 0 3px rgba(179,56,44,.16)}
.field .req{color:var(--coral)}
.form-actions{display:flex;gap:var(--sp-3);justify-content:flex-end;margin-top:var(--sp-5)}
.toast-stack{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:1300;display:flex;flex-direction:column;gap:10px;align-items:center;pointer-events:none}
.toast{
  background:var(--sky-d);color:#fff;padding:12px 22px;border-radius:999px;font-size:.9rem;
  box-shadow:var(--sh-2);opacity:0;transform:translateY(12px);transition:opacity .4s,transform .4s var(--ease);
}
.toast.show{opacity:1;transform:none}
.toast.err{background:#B3382C}
.lightbox{
  position:fixed;inset:0;z-index:1400;background:rgba(14,42,68,.86);display:grid;place-items:center;
  padding:var(--sp-6);opacity:0;pointer-events:none;transition:opacity .35s;
}
.lightbox.open{opacity:1;pointer-events:auto}
.lightbox img{max-width:min(92vw,560px);max-height:82vh;border-radius:var(--r-lg);background:#fff;padding:10px}
/* 大图模式（地图等需要看清细节的图）：铺得更开、不留白边 */
.lightbox.lb-wide img{
  max-width:min(95vw,1180px);max-height:90vh;padding:0;background:transparent;
  border-radius:var(--r-lg);object-fit:contain;box-shadow:0 30px 80px rgba(4,26,38,.5);
}
.lightbox .lb-close{position:absolute;top:24px;right:28px;color:#fff;background:transparent;border:none;font-size:1.6rem;line-height:1;width:44px;height:44px}
/* ---------- 地图查看器：滚轮 / 双指缩放 + 拖拽平移 ---------- */
.lightbox.map-view{padding:0;background:rgba(6,26,38,.94)}
.map-view .mv-stage{
  position:absolute;inset:0;overflow:hidden;touch-action:none;
  display:grid;place-items:center;cursor:grab;
}
.map-view.dragging .mv-stage{cursor:grabbing}
.map-view .mv-img{
  max-width:min(92vw,1180px);max-height:82vh;padding:0;background:transparent;
  object-fit:contain;border-radius:var(--r-lg);box-shadow:0 30px 80px rgba(4,26,38,.5);
  transform:translate3d(0,0,0) scale(1);transform-origin:center center;
  will-change:transform;transition:none;
  user-select:none;-webkit-user-select:none;-webkit-user-drag:none;touch-action:none;
}
.map-view .mv-img.mv-anim{transition:transform .32s var(--ease)}
.map-view .mv-hint{
  position:absolute;left:0;right:0;top:calc(18px + env(safe-area-inset-top,0));z-index:2;
  margin:0;text-align:center;font-size:.78rem;letter-spacing:.04em;
  color:rgba(255,255,255,.58);pointer-events:none;
}
.map-view .mv-bar{
  position:absolute;left:50%;transform:translateX(-50%);z-index:3;
  bottom:calc(22px + env(safe-area-inset-bottom,0));
  display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:999px;
  background:rgba(10,42,58,.62);border:1px solid rgba(255,255,255,.16);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.mv-btn{
  width:38px;height:38px;border-radius:50%;border:none;cursor:pointer;
  background:rgba(255,255,255,.14);color:#fff;font-size:1.2rem;line-height:1;
  display:grid;place-items:center;transition:background .25s var(--ease);
}
.mv-btn:hover{background:rgba(255,255,255,.3)}
.mv-btn.mv-reset{width:auto;height:34px;padding:0 14px;border-radius:999px;font-size:.82rem;font-weight:600}
.mv-scale{min-width:58px;text-align:center;font-family:var(--font-mono);font-size:.82rem;color:rgba(255,255,255,.92)}
@media(max-width:760px){
  .map-view .mv-img{max-width:94vw;max-height:74vh}
  .map-view .mv-hint{display:none}
  .map-view .mv-bar{bottom:calc(14px + env(safe-area-inset-bottom,0))}
}
/* 地图查看器打开时锁定背景滚动：html 与 body 同时 overflow:hidden，
   避免仅锁 html 时滚动权落到 body（body 仍可被滚轮滚动）。
   地图弹层覆盖全屏且固定在最上层，锁定期间用户看不到 body，关闭即还原，不影响 iOS 导航修复。 */
html.mv-lock, html.mv-lock body{overflow:hidden}
/* 锁期间强制 scroll-behavior:auto，否则 html{scroll-behavior:smooth} 会让「滚动钉」
   的 window.scrollTo 变成平滑动画，触发循环：滚轮→page scroll→pin 触发→scrollTo 平滑滚回→
   再次产生 scroll 事件→再钉回……视觉上背景就会一路往下"跟随"再回弹。 */
html.mv-lock{scroll-behavior:auto !important}

/* ---------- 19. 账号胶囊 ---------- */
.acct-capsule{
  display:inline-flex;align-items:center;gap:10px;padding:5px 14px 5px 6px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);cursor:pointer;
  transition:border-color .3s,box-shadow .3s,transform .3s;font-size:.88rem;font-weight:600;
}
.acct-capsule:hover{border-color:var(--sky);box-shadow:0 0 0 3px rgba(19,135,192,.14);transform:translateY(-1px)}
.acct-ava{
  width:28px;height:28px;border-radius:50%;background:var(--sky-d);color:#fff;
  display:grid;place-items:center;font-size:.8rem;font-weight:700;flex-shrink:0;
}
.acct-lv{font-family:var(--font-mono);font-size:.66rem;color:var(--coral);border:1px solid rgba(244,82,13,.5);border-radius:999px;padding:1px 7px}
.acct-float{position:fixed;top:16px;right:20px;z-index:1000}
.acct-panel{
  position:absolute;top:calc(100% + 12px);right:0;width:320px;background:var(--paper);
  border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-3);padding:var(--sp-5);
  opacity:0;transform:translateY(-8px);pointer-events:none;transition:opacity .3s,transform .4s var(--ease);
}
.acct-slot{position:relative}
.acct-slot.open .acct-panel{opacity:1;transform:none;pointer-events:auto}
.acct-panel .ap-head{display:flex;align-items:center;gap:var(--sp-3);margin-bottom:var(--sp-4)}
.acct-panel .ap-ava{width:46px;height:46px;border-radius:50%;background:var(--ink);color:#F8FCFE;display:grid;place-items:center;font-size:1.1rem;font-weight:700}
.acct-panel .ap-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:var(--sp-4) 0}
.ap-stat{background:var(--surface-2);border-radius:var(--r);padding:10px;text-align:center}
.ap-stat b{display:block;font-family:var(--font-mono);font-size:1.15rem}
.ap-stat span{font-size:.7rem;color:var(--muted)}
.acct-panel .ap-links{display:flex;gap:var(--sp-2);flex-wrap:wrap}
.acct-panel .ap-edit{display:flex;gap:8px}
.acct-panel .ap-edit input{
  flex:1;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);
  padding:8px 12px;font-family:inherit;font-size:.88rem;outline:none;
}
/* 改昵称的就近报错（重名等）：紧贴输入框下方 */
.acct-panel .ap-err{
  margin:6px 0 0;font-size:.78rem;line-height:1.5;color:#B3382C;
}
.acct-panel .ap-err:not([hidden]) ~ .ap-stats{margin-top:var(--sp-3)}
/* 未登录态：胶囊退化为「登录 / 注册」入口（同样是 <a>，但视觉一致） */
a.acct-capsule{text-decoration:none;color:inherit}
.acct-capsule .acct-ava svg{width:15px;height:15px;display:block}
a.acct-capsule.acct-guest .acct-ava{background:var(--ink-3)}
.acct-panel .ap-out{
  margin-top:var(--sp-4);padding-top:var(--sp-4);border-top:1px solid var(--line-soft);
  display:flex;gap:var(--sp-2);flex-wrap:wrap;
}
.acct-panel .ap-out .btn{flex:1;justify-content:center}

/* ---------- 20. 动画基态 ---------- */
.anim-ready [data-reveal]{opacity:0;transform:translateY(30px)}
.anim-ready [data-reveal="fade"]{transform:none}
.anim-ready [data-split]{opacity:0}
.anim-ready [data-split] .line{display:block}
html.gsap-reduce [data-reveal],html.gsap-reduce [data-split]{opacity:1;transform:none}
html.gsap-reduce .hero-img-main{clip-path:none}
html.gsap-reduce .type-inline .t-img{transform:none;opacity:1}
.no-js .anim-ready [data-reveal],.no-js .anim-ready [data-split]{opacity:1;transform:none}

/* ---------- 21. 页面切换过渡：三条蓝带横扫 + ACM（无阴影） ---------- */
.page-bands{position:fixed;inset:0;z-index:2200;pointer-events:none}
.page-bands.hide{display:none}
.page-bands .band{
  position:absolute;left:0;right:0;height:33.3334%;
  background:var(--sky);
  transform:none; /* 位移完全交给 GSAP，避免与 CSS 默认值叠加 */
  will-change:transform;
}
.page-bands .b1{top:0}
.page-bands .b2{top:33.3334%}
.page-bands .b3{top:66.6668%}
.page-bands.cover .band{transform:translateX(0)}
.band-letters{
  position:absolute;inset:0;display:grid;place-items:center;
  /* 系统等宽字体：不依赖 WebFont，杜绝过渡瞬间字体替换抖动 */
  font-family:Consolas,"SF Mono",Menlo,"Liberation Mono","Courier New",monospace;
  font-weight:800;color:#fff;
  font-size:clamp(8rem,24vw,24rem);letter-spacing:-.05em;line-height:.85;
  opacity:0;user-select:none;will-change:transform,opacity;
}
.page-bands.cover .band-letters{opacity:1}

/* 版本水印（排查缓存用） */
.ver-badge{
  display:inline-block;margin-left:8px;font-family:var(--font-mono);font-size:.62rem;
  color:rgba(244,82,13,.9);border:1px solid rgba(244,82,13,.5);border-radius:999px;
  padding:1px 8px;vertical-align:middle;
}

/* ---------- 22. 响应式 ---------- */
@media(max-width:1120px){
  .hero-inner{grid-template-columns:1fr;gap:var(--sp-6)}
  .hero-art{height:420px;margin-top:var(--sp-5)}
  .hero-img-main{right:4%;width:min(64%,480px)}
  .hero-img-float{left:10%}
  .sec-head{grid-template-columns:1fr;gap:var(--sp-4)}
  .sec-head .right{justify-self:start;text-align:left}
  .voices{grid-template-columns:1fr;gap:var(--sp-6)}
  .voice-portraits{justify-content:flex-start}
  .art-layout{grid-template-columns:1fr}
  .art-aside{position:static;flex-direction:row;flex-wrap:wrap}
  .art-aside .aside-box{flex:1;min-width:220px}
  .foot-grid{grid-template-columns:1fr 1fr 1fr}
  .forum-layout{grid-template-columns:1fr}
  .forum-side{position:static;flex-direction:row;flex-wrap:wrap}
  .forum-side .side-box{flex:1;min-width:240px}
}
@media(max-width:960px){
  .bento .span-7,.bento .span-5,.bento .span-8,.bento .span-4,.bento .span-6{grid-column:span 12}
  .split-pin{grid-template-columns:1fr;gap:var(--sp-6)}
  .pin-col{height:auto}
  .h-acc{height:auto;flex-direction:column}
  .h-acc-item{height:64px}
  .h-acc-item.open{height:340px}
  .acc-title{writing-mode:horizontal-tb;transform:none;height:auto;padding:18px var(--sp-5)}
  /* 移动端标题变为水平排版，与左上角的数字徽章发生重叠（开合两态都受影响）。
     把徽章移到右上角，与左对齐的标题各占一侧；既有"序号"装饰，又消除遮挡。 */
  .h-acc-item .acc-num{left:auto;right:var(--sp-4)}
  .stack-card{grid-template-columns:1fr;gap:var(--sp-4)}
  .stack-media{order:-1}
  .art-prevnext{grid-template-columns:1fr}
}
@media(max-width:720px){
  .nav-links{display:none}
  .nav-burger{display:flex}
  .mobile-drawer{display:flex}
  /* 只隐藏导航条里「立即报名」这类直接子按钮。
     ⚠️ 原来写的是 `.nav-actions .btn`（后代选择器），会把账号面板里的
     .ap-out 退出登录、.ap-links 我的发帖/回复一并 display:none —— 手机端
     面板里看不到退出按钮的真凶就是它。故改为 `>` 直接子元素并排除 .acct-slot。 */
  .nav-actions > .btn{display:none}
  .nav-actions > .acct-slot .btn{display:inline-flex}
  .hero{min-height:auto;padding-top:calc(var(--nav-h) + var(--sp-7))}
  .hero-img-float{display:none}
  .hero-art{height:320px}
  .hero-img-main{right:0;width:86%}
  .cta-title{letter-spacing:-.02em}
  .foot-grid{grid-template-columns:1fr 1fr}
  .search-box{min-width:100%;order:3;margin-left:0}
  .card-grid{grid-template-columns:1fr}
  .gallery-col{columns:1}
  .modal{padding:var(--sp-5)}
}

/* 招募流程条 */
.acm-flow{display:flex;align-items:center;gap:var(--sp-4);margin-top:var(--sp-7);padding-top:var(--sp-5);border-top:1px solid var(--line)}
.flow-step{display:flex;align-items:center;gap:var(--sp-3);flex:1}
.fs-num{width:34px;height:34px;border-radius:50%;background:var(--sky);color:#fff;display:grid;place-items:center;font-size:.95rem;flex-shrink:0}
.flow-step b{display:block;font-size:.95rem}
.flow-step span:last-child{font-size:.78rem;color:var(--muted)}
.flow-arrow{font-family:var(--font-mono);color:var(--muted-2);font-size:1.1rem}
@media(max-width:720px){
  .acm-flow{flex-direction:column;align-items:flex-start;gap:var(--sp-3)}
  .flow-arrow{transform:rotate(90deg);margin-left:14px}
}

/* 为什么加入：非对称图版 + 数字 + 悬停清单 + 视差图带 */
.why-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:var(--sp-7);align-items:start;margin-top:var(--sp-6)}
.why-left{display:flex;flex-direction:column;gap:var(--sp-5)}
.why-plate{position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:4/5;
  background:linear-gradient(155deg,var(--sky-d),var(--sky))}
.why-plate img{width:100%;height:100%;object-fit:cover;filter:none;clip-path:inset(0 0 100% 0)}
.why-plate figcaption{position:absolute;left:var(--sp-4);bottom:var(--sp-4);background:#fff;color:var(--sky-d);
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;padding:7px 14px;border-radius:var(--r-sm)}
.why-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-3)}
.wstat{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r);padding:var(--sp-4) var(--sp-2);text-align:center}
.wstat b{display:block;font-family:var(--font-mono);font-size:1.9rem;font-weight:800;letter-spacing:-.03em;color:var(--sky)}
.wstat span{font-size:.75rem;color:var(--muted)}
.why-tenets li{padding:var(--sp-4) var(--sp-3);border-top:1px solid var(--line);transition:background-color .35s,padding-left .35s}
.why-tenets li:hover{background:var(--surface);padding-left:var(--sp-5)}
.why-tenets .n{transition:color .35s,transform .35s}
.why-tenets li:hover .n{color:var(--coral);transform:translateX(3px)}
.why-tenets h4{display:flex;align-items:center;gap:8px}
.why-tenets h4::after{content:'→';font-family:var(--font-mono);margin-left:auto;opacity:0;transform:translateX(-6px);
  transition:opacity .35s,transform .35s;color:var(--sky)}
.why-tenets li:hover h4::after{opacity:1;transform:none}
.why-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-4);margin-top:var(--sp-7)}
.why-strip figure{position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/10;background:var(--paper-2)}
.why-strip img{width:100%;height:100%;object-fit:cover;filter:none;will-change:transform}
.why-strip figcaption{position:absolute;left:var(--sp-3);bottom:var(--sp-3);background:rgba(14,42,68,.65);color:#fff;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;padding:6px 12px;border-radius:var(--r-sm)}
@media(max-width:960px){.why-grid{grid-template-columns:1fr}.why-strip{grid-template-columns:1fr}}

/* 活动回顾：7+5 大图拼板 */
.retro-grid{display:grid;grid-template-columns:repeat(12,1fr);grid-auto-flow:dense;gap:var(--sp-4);margin-top:var(--sp-6)}
.retro-item{position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;background:var(--paper-2);aspect-ratio:16/10}
.retro-item.big{grid-column:span 7}
.retro-item.small{grid-column:span 5}
.retro-item img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;filter:none;transition:transform 1.1s var(--ease)}
.retro-item:hover img{transform:scale(1.06)}
.retro-item figcaption{position:absolute;left:var(--sp-3);bottom:var(--sp-3);background:rgba(14,42,68,.68);color:#fff;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;padding:6px 12px;border-radius:var(--r-sm)}

/* 代言人海报：3:4 立版画廊 */
.poster-row{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-4);margin-top:var(--sp-6)}
.poster{position:relative;z-index:0;margin:0;aspect-ratio:3/4;border-radius:var(--r);overflow:hidden;
  background:linear-gradient(160deg,var(--ink-2),var(--sky-d));
  transition:transform .5s var(--ease),box-shadow .5s}
.poster:hover{transform:translateY(-6px) rotate(-.6deg);box-shadow:var(--sh-2)}
.poster img{width:100%;height:100%;object-fit:cover;filter:none}
.poster::after{content:'';position:absolute;inset:0;z-index:2;pointer-events:none;background:linear-gradient(180deg,rgba(0,0,0,0) 55%,rgba(0,0,0,.5) 100%)}
.poster figcaption{position:absolute;left:var(--sp-3);right:var(--sp-3);bottom:var(--sp-3);z-index:3;color:#fff}
.poster figcaption b{display:block;font-size:.95rem}
.poster figcaption span{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;color:rgba(255,255,255,.75)}

/* 社团活动：图片卡 */
.act-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--sp-4);margin-top:var(--sp-6)}
.act-card{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-lg);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .5s var(--ease),border-color .35s}
.act-card:hover{transform:translateY(-6px);border-color:rgba(19,135,192,.45)}
.act-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--paper-2)}
.act-media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;filter:none;transition:transform 1.1s var(--ease)}
.act-card:hover .act-media img{transform:scale(1.07)}
.act-body{padding:var(--sp-4);flex:1;display:flex;flex-direction:column}
.act-body h3{margin:0 0 6px;font-size:1.08rem}
.act-body p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.7;flex:1}
.act-body .ac-meta{margin-top:var(--sp-3)}

@media(max-width:960px){
  .retro-item.big,.retro-item.small{grid-column:span 12}
  .poster-row{grid-template-columns:repeat(3,1fr)}
  .act-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:720px){.act-grid{grid-template-columns:1fr}}

/* ---------- Lenis 平滑滚动接管（覆盖 html{scroll-behavior:smooth}） ---------- */
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
.lenis.lenis-smooth [data-lenis-prevent]{overscroll-behavior:contain}
.lenis.lenis-stopped{overflow:hidden}
.lenis.lenis-smooth iframe{pointer-events:none}

/* ==================================================================
   青科山海志 · 首页叙事章节 obs-hero（滚动蒙版观测）
   技法源自 TERRA OBSERVATORY：SVG mask 窗口 + 单一滚动进度驱动 CSS 变量
   层序：backdrop → mask(窗口) → grid → markers → content → hud/progress
   配色：晴空海蓝 #1387C0 / 暖橙光 #F4520D / 奶油米白 #FAEDD1 / 深蓝 #0A2A3A
   ================================================================== */
.obs-hero{
  --mask-scale:1; --mask-inv:1;
  --img-sat:.85; --img-bright:.9; --img-scale:1; --overlay:.3;
  --img-y:0px; --backdrop-y:0px; --sun-y:0px;
  --grid-opacity:0; --grid-scale:1; --marker-opacity:0;
  --obs-accent:#1387C0; --obs-ember:#F4520D;
  --obs-dark:#0A2A3A; --obs-light:#FAEDD1;
  --obs-line:rgba(250,237,209,.16);
  --f-mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  position:relative; height:100vh; height:100svh; overflow:hidden;
  background:var(--obs-dark); isolation:isolate; color:var(--obs-light);
}
.obs-layer{position:absolute;inset:0;width:100%;height:100%;background-size:cover;background-position:center 62%;background-repeat:no-repeat}
.obs-layer--sky{background-image:linear-gradient(180deg,#0A2A3A 0%,#0E5A82 36%,#1387C0 50%,#F4A26B 76%,#FAEDD1 100%)}
.obs-layer--photo{object-fit:cover;object-position:center center;background-image:none;background-position:center center}
.obs-backdrop{position:absolute;inset:0;overflow:hidden;z-index:0}
.obs-backdrop__inner{position:absolute;inset:-30%;transform:translate3d(0,var(--img-y),0);filter:blur(8px) saturate(.9) brightness(.95);will-change:transform;background-image:url('../assets/qust-aerial.jpg');background-size:cover;background-position:center center}
/* 深蓝底：窗口小（初始 / 收缩）时显深蓝，窗口放大铺满时淡出为实景照片 */
.obs-backdrop__veil{position:absolute;inset:0;z-index:1;background:var(--obs-dark);opacity:var(--veil,0);will-change:opacity;pointer-events:none}
.obs-mask{position:absolute;inset:0;z-index:1;transform:scale(var(--mask-scale));transform-origin:center;will-change:transform;
  -webkit-mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1000 1000'%3E%3Crect x='190' y='330' width='620' height='340' rx='18' fill='%23fff'/%3E%3C/svg%3E");
  mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1000 1000'%3E%3Crect x='190' y='330' width='620' height='340' rx='18' fill='%23fff'/%3E%3C/svg%3E");
  -webkit-mask-size:cover;mask-size:cover;-webkit-mask-position:center;mask-position:center;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat}
.obs-mask-inner{position:absolute;inset:0;transform:scale(var(--mask-inv));transform-origin:center;will-change:transform}
.obs-images{position:absolute;inset:0;transform:translate3d(0,var(--img-y),0);will-change:transform}
.obs-image{position:absolute;inset:0;transform:scale(var(--img-scale));transform-origin:center;filter:saturate(var(--img-sat)) brightness(var(--img-bright));will-change:transform,filter}
.obs-image-overlay{position:absolute;inset:0;opacity:var(--overlay);pointer-events:none;background:radial-gradient(ellipse 85% 75% at 50% 50%,rgba(4,6,8,0) 0%,rgba(4,6,8,.45) 100%),linear-gradient(to bottom,rgba(4,6,8,.22) 0%,rgba(4,6,8,.04) 50%,rgba(4,6,8,.32) 100%)}
.obs-grid{position:absolute;inset:0;z-index:2;opacity:var(--grid-opacity);transform:scale(var(--grid-scale));pointer-events:none;
  background-image:linear-gradient(to right,rgba(19,135,192,.18) 1px,transparent 1px),linear-gradient(to bottom,rgba(19,135,192,.18) 1px,transparent 1px),linear-gradient(to right,rgba(250,237,209,.05) 1px,transparent 1px),linear-gradient(to bottom,rgba(250,237,209,.05) 1px,transparent 1px);
  background-size:160px 160px,160px 160px,32px 32px,32px 32px;background-position:center;
  -webkit-mask-image:radial-gradient(ellipse 72% 62% at 50% 50%,#000 25%,transparent 80%);mask-image:radial-gradient(ellipse 72% 62% at 50% 50%,#000 25%,transparent 80%)}
.obs-markers{position:absolute;inset:0;z-index:3;opacity:var(--marker-opacity);pointer-events:none}
.obs-marker{position:absolute;transform:translate(-50%,-50%);display:flex;align-items:center;gap:12px}
.obs-marker__dot{position:relative;flex:none;width:9px;height:9px;border-radius:50%;background:var(--obs-accent);box-shadow:0 0 14px rgba(19,135,192,.9)}
.obs-marker--ember .obs-marker__dot{background:var(--obs-ember);box-shadow:0 0 14px rgba(244,82,13,.9)}
.obs-marker__dot::before,.obs-marker__dot::after{content:"";position:absolute;inset:0;border-radius:50%;border:1px solid var(--obs-accent);animation:obs-marker-pulse 2.6s cubic-bezier(.22,.61,.36,1) infinite}
.obs-marker__dot::after{animation-delay:1.3s}
.obs-marker--ember .obs-marker__dot::before,.obs-marker--ember .obs-marker__dot::after{border-color:var(--obs-ember)}
@keyframes obs-marker-pulse{0%{transform:scale(1);opacity:.85}70%{opacity:0}100%{transform:scale(5.5);opacity:0}}
.obs-marker__label{display:flex;align-items:baseline;gap:10px;font-family:var(--f-mono);font-size:10.5px;letter-spacing:.14em;color:rgba(250,237,209,.82);text-shadow:0 1px 12px rgba(0,0,0,.9);white-space:nowrap}
.obs-marker__label em{font-style:normal;font-weight:500;color:var(--obs-accent)}
.obs-marker--ember .obs-marker__label em{color:var(--obs-ember)}
.obs-hud{position:absolute;top:0;left:0;right:0;z-index:5;display:flex;align-items:center;justify-content:space-between;padding:clamp(18px,3vw,34px) var(--gutter,32px);font-family:var(--f-mono);font-size:11px;letter-spacing:.16em;color:rgba(250,237,209,.72);pointer-events:none}
.obs-hud__brand span{color:var(--obs-accent);margin:0 2px}
.obs-hud__meta{display:flex;align-items:center;gap:14px}
.obs-hud__rule{display:block;width:34px;height:1px;background:var(--obs-line)}
.obs-hud{padding-right:calc(var(--gutter,32px) + 60px)}
.obs-lock{position:absolute;top:92px;right:var(--gutter,32px);z-index:6;width:44px;height:44px;display:grid;place-items:center;border:1px solid rgba(250,237,209,.4);border-radius:50%;background:rgba(10,42,58,.8);color:#FAEDD1;cursor:pointer;touch-action:manipulation;transition:background .2s,border-color .2s}
.obs-lock svg{width:23px;height:23px;pointer-events:none}
.obs-lock:hover,.obs-lock[aria-pressed="true"]{background:#1387C0;border-color:#FAEDD1}
.obs-lock:focus-visible{outline:3px solid #FAEDD1;outline-offset:4px}
.obs-content{position:absolute;top:0;left:0;width:100%;z-index:4;display:flex;flex-direction:column;gap:clamp(180px,26vh,340px);padding:38vh var(--gutter,32px) 38vh;will-change:transform}
.obs-block{max-width:min(560px,100%);will-change:transform,opacity}
.obs-block--center{align-self:center;text-align:center}
.obs-block--left{align-self:flex-start;text-align:left}
.obs-block--right{align-self:flex-end;text-align:right}
.obs-block__phase{margin:0 0 18px;font-family:var(--f-mono);font-size:11px;font-weight:400;letter-spacing:.2em;text-transform:uppercase;color:var(--obs-accent);text-shadow:0 1px 16px rgba(0,0,0,.9)}
.obs-block__title{margin:0 0 20px;font-size:clamp(30px,5vw,68px);font-weight:500;line-height:1.08;letter-spacing:-.022em;color:var(--obs-light);text-shadow:0 4px 48px rgba(0,0,0,.65)}
.obs-block__copy{margin:0;font-size:clamp(14px,1.15vw,17px);font-weight:300;line-height:1.8;color:rgba(250,237,209,.66);text-shadow:0 2px 24px rgba(0,0,0,.85);max-width:44ch}
.obs-block--center .obs-block__copy{margin:0 auto;max-width:46ch}
.obs-block--right .obs-block__copy{margin-left:auto}
.obs-progress{position:absolute;left:0;right:0;bottom:0;z-index:5;display:flex;align-items:flex-end;justify-content:space-between;padding:0 var(--gutter,32px) 16px;font-family:var(--f-mono);font-size:10.5px;letter-spacing:.16em;pointer-events:none}
.obs-progress__stages{display:flex;gap:22px}
.obs-stage{color:rgba(250,237,209,.3);transition:color .45s ease}
.obs-stage i{font-style:normal;opacity:.65;margin-right:2px}
.obs-stage.is-active{color:var(--obs-accent)}
.obs-progress__pct{color:rgba(250,237,209,.72);font-variant-numeric:tabular-nums}
.obs-progress__track{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(250,237,209,.12)}
.obs-progress__fill{height:100%;background:var(--obs-accent);transform:scaleX(0);transform-origin:left center;will-change:transform}
@media(max-width:768px){
  .obs-hud__meta span:last-child,.obs-hud__rule{display:none}
  .obs-marker__label{display:none}
  .obs-content{gap:clamp(150px,22vh,260px);padding:36vh var(--gutter,24px) 36vh}
  .obs-block{max-width:100%}
  /* 窗口缩小时：背景虚化照撤下，露出深蓝底，避免窄屏被照片挤压变形 */
  .obs-backdrop__inner{background-image:none}
}
/* 降级：减少动态 / 无 GSAP —— 静态合成一屏（跳过电影化体验） */
.obs-reduce{height:auto;overflow:visible;background:linear-gradient(180deg,#0A2A3A 0%,#0E5A82 48%,#1387C0 70%,#FAEDD1 100%)}
.obs-reduce .obs-mask,.obs-reduce .obs-backdrop,.obs-reduce .obs-grid,.obs-reduce .obs-markers,.obs-reduce .obs-hud,.obs-reduce .obs-progress{display:none}
.obs-reduce .obs-content{position:relative;padding:20vh var(--gutter,24px) 14vh;gap:44px}
.obs-reduce .obs-block{opacity:1!important;transform:none!important;max-width:640px;margin:0 auto;text-align:center}
@media(prefers-reduced-motion:reduce){
  .obs-marker__dot::before,.obs-marker__dot::after{animation:none}
}

/* ==================== 硬规则：实拍照片零滤镜、零色罩 ====================
   用 !important 锁死：阻止任何 JS 动画（GSAP）、内联样式或后续规则
   重新给照片加滤镜，也防止占位色块露出后被误认为「加了滤镜」。
   照片上的文字可读性一律靠「纯白 + 双层投影 + 底部中性黑渐变」保证，
   不使用品牌蓝罩、不使用 saturate/contrast/brightness 等任何调色。 */
.cell-media img,
#bentoFeatureImg,
#artCover,
.hero-img-main img,
.hero-img-float img,
.gallery-media img,
.stack-media img,
.card-cover img,
.h-acc-item .acc-bg img,
.voice-avatar img,
.why-plate img,
.why-strip img,
.retro-item img,
.poster img,
.act-media img{
  filter:none !important;
  -webkit-filter:none !important;
}
/* 真实照片已到位：占位渐变色块不再出现（它是色块，不是滤镜，但观感相近） */
.cell-media .cover-fallback{display:none !important}
/* 防止历史 onerror 把真实照片隐藏后露出卡片底色 */
#bentoFeatureImg{display:block !important;opacity:1 !important}
/* 关键：占位色块是 position:absolute，未定位的 <img> 会按 CSS 绘制顺序被它盖住，
   表现为「照片只在悬停（transform 创建层叠上下文）时可见，移开后恢复成深蓝色块」。
   强制给照片定位并置顶，保证任何情况下都绘制在占位色块之上。 */
.cell-media img,
#bentoFeatureImg,
.hero-img-main img,
.hero-img-float img,
.gallery-media img,
.stack-media img,
.card-cover img,
.h-acc-item .acc-bg img,
.voice-avatar img,
.why-plate img,
.why-strip img,
.retro-item img,
.poster img,
.act-media img{
  position:relative !important;
  z-index:1 !important;
}

/* 浮动返回按钮：右上角、明显、带悬停/点击动效（点击触发蓝色条带过渡在 shared.js） */
.back-fab{
  position:fixed;top:72px;right:20px;z-index:95;
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 24px;border:none;border-radius:999px;cursor:pointer;
  font:700 1.05rem/1 var(--font-ui,system-ui,sans-serif);color:#fff;letter-spacing:.02em;
  background:var(--sky,#1387C0);
  box-shadow:0 14px 34px rgba(19,135,192,.5);
  transition:transform .26s var(--ease,ease),box-shadow .26s var(--ease,ease),background .26s;
  animation:backPulse 2.6s ease-in-out infinite;
}
@keyframes backPulse{
  0%,100%{box-shadow:0 14px 34px rgba(19,135,192,.5)}
  50%{box-shadow:0 14px 34px rgba(19,135,192,.5),0 0 0 10px rgba(19,135,192,.14)}
}
.back-fab:hover{transform:translateY(-3px) scale(1.06);box-shadow:0 20px 44px rgba(19,135,192,.58);background:#0f74a8;animation:none}
.back-fab:active{transform:scale(.95)}
.back-fab .bf-arrow{font-size:1.35rem;line-height:1;transition:transform .26s var(--ease,ease)}
.back-fab:hover .bf-arrow{transform:translateX(-4px)}
@media(max-width:560px){
  .back-fab{top:64px;right:12px;padding:12px 18px}
  .back-fab .bf-label{display:none}
}

/* ==================== 论坛封禁占位页（静态站阶段）====================
   forum.html 被访问时，由 js/shared.js 给 <html> 加 .forum-off，
   隐藏论坛正文并展示下方「开发中」占位区块。恢复论坛只需在
   js/shared.js 把 FORUM_DISABLED 改回 false，无需改动本文件。 */
.forum-off main.page{display:none}
.dev-hold{
  padding-top:clamp(72px,12vh,140px);padding-bottom:clamp(72px,12vh,140px);
  background:linear-gradient(180deg,var(--paper-2),var(--paper));
  border-top:1px solid rgba(46,143,208,.18);border-bottom:1px solid rgba(46,143,208,.18);
}
.dev-hold-inner{text-align:center;max-width:720px}
.dev-hold-inner .kicker{display:inline-block;margin-bottom:var(--sp-3)}
.dev-hold-actions{
  display:flex;gap:var(--sp-3);justify-content:center;flex-wrap:wrap;margin-top:var(--sp-6);
}

/* ==================== 移动端底部导航（覆盖汉堡菜单）==================== */
.bottom-nav{display:none}
.nav-scrim{display:none}

/* 2026-09-18 顶部导航新增「游戏」栏目后共 8 项，实测横排导航在 <1170px 会折行
   （此前 7 项时 720–1110px 区间本就存在同类折行，属既有问题）。
   统一收口：<1220px 收起横排导航，改用汉堡 + 抽屉（平板端为顶部下拉面板，
   移动端 ≤760px 仍为底部浮层，见下方 media 块）。 */
@media(max-width:1220px){
  .nav-links{display:none}
  .nav-burger{display:flex}
  .mobile-drawer{display:flex}
  .nav-scrim{
    display:block;position:fixed;inset:0;z-index:880;
    background:rgba(14,42,68,.45);opacity:0;pointer-events:none;
    transition:opacity .3s;
  }
  body.nav-open .nav-scrim{opacity:1;pointer-events:auto}
}

@media(max-width:760px){
  /* 同根元素修复：移动端必须用 clip，避免 body 变成滚动容器破坏 fixed + backdrop-filter */
  html{overflow-x:hidden;overflow-x:clip}
  body{overflow-x:hidden;overflow-x:clip}
  /* 顶部导航栏：毛玻璃。底色不透明度 ~.55，留住"看到模糊光斑"的层次感。
     关键：blur(36px) 让身后文字/图标被严重模糊、不可识别——视觉上等于"被遮挡"，
     但依然能透出区域色块，体现毛玻璃材质。
     删除 saturate()：在 iOS Safari 18 上 saturate 会让颜色饱和度爆炸，
     视觉上反而推向磨砂实色。 */
  /* 顶部导航栏：v43 — 用户明确要求「固定菜单完全遮挡身上方内容」。
     .92 高不透明 + blur(20px)：
       - .92 在 iOS Safari 跳帧 / backdrop-filter 失效的极端场景下，几乎完全挡住后面内容（视觉上跟 .94 实色无法区分）；
       - 同时 blur(20px) + .08 透出保留「玻璃」层次感，边缘能看到下方深蓝光晕流动；
       - transform: translateZ(0) 让 nav 进入独立 GPU 合成层，从根上避免 iOS 的「fixed + backdrop-filter 跳帧」穿透。
     保留的「半透明毛玻璃效果」= 模糊光晕流动；已消除的「穿透感」= 文字/图标清晰可见。 */
  .site-nav{
    background:rgba(250,237,209,.92) !important;
    -webkit-backdrop-filter:blur(20px);
    backdrop-filter:blur(20px);
    border-bottom:1px solid rgba(14,42,68,.20) !important;
    border-bottom-color:rgba(14,42,68,.20) !important;
    display:flex;align-items:flex-end;justify-content:center;
    height:calc(var(--nav-h) + env(safe-area-inset-top,0));
    padding-top:env(safe-area-inset-top,0);
    transform:translateZ(0);
    -webkit-transform:translateZ(0);
  }
  .site-nav .nav-inner{height:var(--nav-h);width:100%}
  .site-nav{box-shadow:0 1px 0 rgba(14,42,68,.10),0 6px 22px rgba(14,42,68,.08)}
  body[data-page="index"] .site-nav:not(.scrolled) .brand-name,
  body[data-page="acm"] .site-nav:not(.scrolled) .brand-name{color:var(--ink) !important}
  body[data-page="index"] .site-nav:not(.scrolled) .brand-name small,
  body[data-page="acm"] .site-nav:not(.scrolled) .brand-name small{color:var(--muted) !important}
  body[data-page="index"] .site-nav:not(.scrolled) .nav-burger,
  body[data-page="acm"] .site-nav:not(.scrolled) .nav-burger{border-color:rgba(14,42,68,.35) !important}
  body[data-page="index"] .site-nav:not(.scrolled) .nav-burger span,
  body[data-page="acm"] .site-nav:not(.scrolled) .nav-burger span{background:var(--ink) !important}

  /* 底部导航栏：v43 — 同步策略，底色 .94 比顶部更强。
     因为底部要遮挡的是动态滚过的彩色图片和大段文字内容，反差比顶部更大，更需要兜底。 */
  .bottom-nav{
    position:fixed;left:0;right:0;bottom:0;z-index:920;
    display:flex;justify-content:space-around;align-items:stretch;
    height:calc(56px + env(safe-area-inset-bottom,0));
    padding-bottom:env(safe-area-inset-bottom,0);
    background:rgba(250,237,209,.94);
    -webkit-backdrop-filter:blur(20px);
    backdrop-filter:blur(20px);
    border-top:1px solid rgba(14,42,68,.20);
    box-shadow:0 -1px 0 rgba(14,42,68,.10),0 -6px 22px rgba(14,42,68,.08);
    transform:translateZ(0);
    -webkit-transform:translateZ(0);
  }
  .bottom-tab,
  .bottom-tab button{
    flex:1;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:3px;padding:6px 2px;color:var(--muted);font-size:10px;font-weight:600;line-height:1.2;
    text-decoration:none;background:transparent;border:none;cursor:pointer;-webkit-tap-highlight-color:transparent;
    transition:color .2s,transform .2s;
  }
  .bottom-tab svg{width:23px;height:23px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  .bottom-tab.active{color:var(--sky)}
  .bottom-tab:active{transform:scale(.92)}

  /* 中心凸起按钮（硕市生）：图标做圆形品牌色徽章，上凸出底栏，强调正中位置 */
  .bottom-tab.is-center{margin-top:-14px;color:var(--ink-2)}
  .bottom-tab.is-center svg{
    width:30px;height:30px;padding:7px;border-radius:50%;
    background:var(--coral);color:#fff;stroke:#fff;
    box-shadow:0 6px 18px rgba(244,82,13,.32),0 1px 0 rgba(14,42,68,.08);
    transition:transform .25s var(--ease),background .25s var(--ease);
  }
  .bottom-tab.is-center span{font-weight:700;color:var(--ink);font-size:10.5px;margin-top:3px;letter-spacing:.04em}
  .bottom-tab.is-center.active svg{background:var(--sky-d)}
  .bottom-tab.is-center:active svg{transform:scale(.94)}

  /* 噪点层改为普通混合：mix-blend-mode 会干扰 iOS 上 backdrop-filter 的采样管线，
     而 5% 的颗粒几乎不可见，去掉混合模式无视觉损失 */
  body::after{mix-blend-mode:normal;opacity:.04}

  /* 页面内容留出顶部刘海/灵动岛安全区，底部栏高度 + 100px 缓冲
     (用户截图验证：56px 缓冲在 ACM 页面的"04 公益行动"那段仍被 tabbar 部分挡住,
     加大到 100px 后任何最后一段文字都能在 tabbar 上方完整显示) */
  body{padding-top:env(safe-area-inset-top,0);padding-bottom:calc(56px + env(safe-area-inset-bottom,0) + 100px)}

  /* ===== Hero 移动端布局：让 navbar 后面只剩渐变色块 =====
     用户明确要求："固定菜单应完全遮挡住身上方的文字和图片" —
     v44 加大幅度：hero 内容起始位置从 nav 底部再推 +24 → +80px，
     避免 nav 边界紧贴 hero 顶部图层产生的"硬边缘感"。 */
  .hero,
  .acm-hero{
    min-height:100vh !important;
    padding-top:calc(var(--nav-h) + env(safe-area-inset-top,0) + var(--sp-7) + 80px) !important;
    justify-content:flex-start !important;
  }
  .hero-copy,
  .acm-hero .wrap{padding-top:var(--sp-4) !important}
  /* hero 顶部加一层柔和的"为毛玻璃而生"的蒙层——模糊后看着像光晕，弱化内容穿透感 */
  .hero::before{
    content:"";position:absolute;left:0;right:0;top:0;
    height:calc(var(--nav-h) + env(safe-area-inset-top,0) + 40px);
    background:linear-gradient(to bottom,var(--sky-d) 0%,var(--sky) 60%,transparent 100%);
    pointer-events:none;z-index:1;
  }

  /* 顶部导航精简：隐藏汉堡和报名按钮（已在 720px 媒体查询隐藏），胶囊变头像 */
  .nav-burger{display:none!important}
  .acct-capsule{padding:4px;border-radius:50%}
  .acct-capsule .acct-name,
  .acct-capsule .acct-lv{display:none}
  .acct-capsule .acct-ava{margin:0}

  /* 账号面板窄屏适配：胶囊此时只剩一个圆头像贴在右侧，
     桌面端 width:320px + right:0 会以头像右缘为基准向左推 320px → 溢出屏幕
     （左右都被切、退出登录按钮被挤出可视区）。
     ⚠️ 不用 position:fixed：祖先 .site-nav.scrolled 带 backdrop-filter，
     会给内部 fixed 建立包含块，panel 会相对导航条而非视口定位。
     做法：让槽位脱离定位（static），面板改为相对 .site-nav 定位——
     .site-nav 是 position:fixed;left:0;right:0，本身即视口宽度，right:16px 就是距屏幕右边 16px。
     宽度 min(320px, 视口-32px) 保证 320px 窄屏也留边距；限高可滚动确保「退出登录」可达。 */
  .acct-slot{position:static}
  .acct-panel{
    left:16px;right:16px;width:auto;
    top:calc(var(--nav-h) + env(safe-area-inset-top,0) + 8px);
    /* 只给 top 与 max-height（不给 bottom，避免被拉伸成满高）。
       max-height = 视口高 − 面板顶偏移 − 底部留白（底部 tab 72px + 安全区 + 8px 间隙）。
       内容超出时面板内部滚动，「退出登录」始终可滚到。 */
    max-height:calc(100vh - var(--nav-h) - env(safe-area-inset-top,0) - 8px - 72px - env(safe-area-inset-bottom,0) - 8px);
    overflow-y:auto;-webkit-overflow-scrolling:touch;
    overscroll-behavior:contain;
  }

  /* 抽屉改为底部浮层 */
  .mobile-drawer{
    top:auto !important;left:8px;right:8px;
    bottom:calc(56px + env(safe-area-inset-bottom,0));
    max-height:calc(100vh - 56px - env(safe-area-inset-bottom,0) - 16px);
    overflow-y:auto;-webkit-overflow-scrolling:touch;
    display:flex;flex-direction:column;border-radius:18px 18px 0 0;
    padding:18px 20px calc(12px + env(safe-area-inset-bottom,0));
    background:var(--paper);
    box-shadow:0 -10px 42px rgba(14,42,68,.18);
    transform:translateY(calc(100% + 80px));
    opacity:0;visibility:hidden;pointer-events:none;
    transition:transform .35s var(--ease),opacity .25s,visibility .25s;
  }
  .mobile-drawer::before{
    content:"";position:absolute;top:10px;left:50%;transform:translateX(-50%);
    width:36px;height:4px;border-radius:99px;background:var(--line-soft);
  }
  body.nav-open .mobile-drawer{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto}

  /* 遮罩层 */
  .nav-scrim{
    display:block;position:fixed;inset:0;z-index:880;
    background:rgba(14,42,68,.45);
    opacity:0;pointer-events:none;
    transition:opacity .3s;
  }
  body.nav-open .nav-scrim{opacity:1;pointer-events:auto}

  /* 返回按钮移到右下角，避免与顶部导航和底部栏冲突 */
  .back-fab{top:auto;bottom:calc(72px + env(safe-area-inset-bottom,0));right:14px;padding:14px}
  .back-fab .bf-label{display:none}
}

/* 小屏进一步紧凑（与 760px 规则叠加） */
@media(max-width:560px){
  .bottom-tab span{font-size:9.5px}
}

/* Forum images and reactions */
.forum-reactions,.reply-reactions{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}
.forum-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0}
.forum-gallery:empty{display:none}
.forum-gallery>a{grid-column:1/-1}
.forum-photo{padding:0;border:0;border-radius:12px;overflow:hidden;background:var(--paper);cursor:zoom-in;justify-self:start;align-self:start;max-width:100%}
.forum-photo img{width:auto;max-width:100%;height:auto;aspect-ratio:auto;object-fit:contain;display:block}
.forum-image-preview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:12px}
.forum-image-preview img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:8px;display:block}
.forum-image-preview button{margin-top:6px;padding:6px 10px;cursor:pointer}
.forum-reactions [aria-pressed=true],.reply-reactions [aria-pressed=true]{border-color:var(--coral);color:var(--coral)}
/* Forum reading layout: compact navigation, quiet rows and explicit reaction states. */
.forum-page main .wrap{max-width:1180px}
.forum-page #forumGate[hidden],.forum-page #backListBtn[hidden],.forum-page #forumAdminLink[hidden]{display:none}
.forum-page .forum-hero{padding-bottom:32px}
.forum-page .forum-hero .h1{font-size:clamp(2rem,3.6vw,3.1rem);line-height:1.3}
.forum-page .forum-hero .lead{font-size:1rem;color:var(--muted)}
.forum-page .forum-layout{grid-template-columns:210px minmax(0,1fr);gap:40px}
.forum-page .side-box{background:transparent;border:0;border-radius:0;padding:16px 0}
.forum-page .side-box h4{font-family:var(--font-sans);letter-spacing:.04em;font-size:.78rem;font-weight:600;margin-bottom:12px}
.forum-page .board-link{padding:10px 12px;border:0;border-radius:6px;font-size:.88rem}
.forum-page .board-link:hover{background:rgba(14,42,68,.04)}
.forum-page .board-link.on{background:rgba(19,135,192,.09);color:var(--sky-d)}
.forum-page .hot-item{padding:12px 8px;font-size:.82rem}
.forum-page .forum-toolbar{margin-bottom:8px;gap:12px}
.forum-page .forum-search{max-width:none;border-radius:8px;height:44px}
.forum-page .f-sortbar{padding:12px 0 18px;margin-bottom:0;border-bottom:1px solid var(--line)}
.forum-page .f-sortlabel{display:none}
.forum-page .f-sort{border:0;border-radius:6px;font-size:.85rem;padding:6px 12px}
.forum-page .f-sort.on{background:rgba(19,135,192,.1);color:var(--sky-d)}
.forum-page .thread-row{grid-template-columns:42px minmax(0,1fr) auto;gap:16px;border:0;border-bottom:1px solid var(--line-soft);border-radius:0;padding:24px 8px;background:transparent;transition:background .18s}
.forum-page .thread-row:hover{transform:none;background:rgba(253,247,234,.75)}
.thread-avatar{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:var(--surface-2);color:var(--ink-3);font-size:.95rem;font-weight:600}
.thread-summary{min-width:0}
.forum-page .thread-row .t-title{font-size:1rem;font-weight:600;overflow-wrap:anywhere;flex-wrap:wrap;gap:8px}
.forum-page .thread-row .t-sub{font-family:var(--font-sans);font-size:.77rem;color:var(--muted);gap:12px;margin-top:8px}
.thread-board{color:var(--sky-d)}
.forum-page .thread-row .t-stats{gap:20px;font-family:var(--font-sans);font-size:.72rem;min-width:62px}
.forum-page .thread-row .t-stats b{font-size:.95rem;font-weight:500;font-variant-numeric:tabular-nums}
.forum-page .thread-row:focus-visible{outline:2px solid var(--sky);outline-offset:-2px}
.forum-page .post-view{padding:32px 36px;border-radius:12px;background:var(--surface);border-color:var(--line-soft)}
.post-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}
.post-board{font-size:.78rem;font-weight:500;color:var(--sky-d)}
.post-delete{border:0;background:transparent;color:var(--muted);font:inherit;font-size:.75rem;min-height:44px;padding:0 8px;cursor:pointer;border-radius:6px}
.post-delete:hover{background:var(--surface-2);color:#a63a14}
.forum-page .post-view .p-title{font-size:clamp(1.5rem,2.5vw,2rem);line-height:1.4;font-weight:650;margin:8px 0 22px;overflow-wrap:anywhere}
.post-author{display:flex;gap:12px;align-items:center;padding-bottom:24px;border-bottom:1px solid var(--line-soft)}
.post-author b{font-size:.86rem;font-weight:600}
.post-time{font-size:.74rem;color:var(--muted)}
.forum-page .reply-ava{background:rgba(19,135,192,.09);color:var(--sky-d);border-radius:10px;width:38px;height:38px}
.forum-page .post-view .p-body{font-size:1rem;line-height:1.95;margin-top:28px;max-width:70ch;overflow-wrap:anywhere}
.forum-page .forum-reactions{gap:8px;margin:24px 0 0;padding:18px 0;border-top:1px solid var(--line-soft)}
.forum-page .forum-gallery:has(.forum-photo:only-child){grid-template-columns:minmax(0,520px)}
.forum-page .forum-gallery:has(.forum-photo:nth-child(2):last-child){grid-template-columns:repeat(2,minmax(0,1fr))}
.reaction-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 14px;border:1px solid var(--line-soft);border-radius:8px;background:transparent;color:var(--muted);font:inherit;font-size:.84rem;line-height:1.4;cursor:pointer;transition:background .18s,color .18s,border-color .18s;white-space:nowrap;font-variant-numeric:tabular-nums}
.reaction-button svg{flex-shrink:0;transition:fill .18s}
.reaction-button:hover:not(:disabled){background:var(--surface-2);color:var(--ink)}
.reaction-button[aria-pressed=true]{background:rgba(19,135,192,.08);border-color:rgba(19,135,192,.2);color:var(--sky-d)}
.reaction-button[aria-pressed=true] svg{fill:rgba(19,135,192,.18)}
.reaction-button:disabled{opacity:.55;cursor:default}
.reaction-button:focus-visible,.post-delete:focus-visible{outline:2px solid var(--sky);outline-offset:3px}
.discussion-heading{margin:16px 0 0;padding:24px 0 18px;border-top:1px solid var(--line);font-size:.95rem;font-weight:600}
.forum-page .reply-list{margin-top:0;border-top:0;padding-top:0;gap:0}
.forum-page .reply-item{padding:20px 0;border-bottom:1px solid var(--line-soft)}
.forum-page .reply-main{min-width:0}
.forum-page .reply-main .r-meta{font-family:var(--font-sans);font-size:.73rem;flex-wrap:wrap;gap:8px 12px;color:var(--muted)}
.forum-page .reply-main .r-meta b{font-size:.84rem;font-weight:600}
.forum-page .reply-main .r-text{margin-top:10px;line-height:1.85;white-space:pre-wrap;overflow-wrap:anywhere}
.forum-page .reply-reactions{margin:8px 0 0;gap:8px}
.reply-reactions .reaction-button{border-color:transparent;padding:0 10px;margin-left:-10px;font-size:.76rem}
.reply-empty{color:var(--muted);font-size:.88rem;padding:12px 0 24px;margin:0}
.forum-page .composer{margin-top:28px;border:0;padding-top:0}
.forum-page .composer textarea{border-radius:8px;padding:16px;font-size:.9rem;min-height:130px}
@media(max-width:900px){
 .forum-page .forum-layout{grid-template-columns:1fr;gap:20px}
 .forum-page .forum-side{position:static;flex-direction:column;gap:0;min-width:0}
 .forum-page .side-box{padding:0;margin:0;min-width:0;flex:auto}
 .forum-page .side-box h4{display:none}
 .forum-page .side-box:nth-child(2){display:none}
 .forum-page #boardList{display:flex;gap:6px;overflow-x:auto;padding-bottom:10px}
 .forum-page #boardList .board-link{flex-shrink:0;gap:10px;white-space:nowrap}
 .forum-page .side-box:last-child{display:flex;gap:8px;border-top:1px solid var(--line-soft);padding-top:6px;flex-wrap:wrap}
 .forum-page .side-box:last-child .board-link{font-size:.78rem;padding:8px 12px}
}
@media(max-width:600px){
 .forum-page .forum-hero{padding-top:calc(var(--nav-h) + 28px);padding-bottom:20px}
 .forum-page .forum-hero .lead{font-size:.87rem;line-height:1.7}
 .forum-page .forum-toolbar{gap:8px}
 .forum-page .forum-search{min-width:0;flex-basis:calc(100% - 105px)}
 .forum-page .f-sortbar{gap:6px;padding-bottom:12px}
 .forum-page .f-sort{padding:6px 10px}
 .forum-page .f-count{font-size:.7rem}
 .forum-page .thread-row{grid-template-columns:34px minmax(0,1fr);gap:12px;padding:18px 0}
 .thread-avatar{width:34px;height:34px;border-radius:9px;font-size:.8rem}
 .forum-page .thread-row .t-stats{grid-column:2;gap:16px;text-align:left}
 .forum-page .thread-row .t-stats div{display:flex;gap:5px;align-items:center}
 .forum-page .thread-row .t-stats b{font-size:.78rem}
 .forum-page .thread-row .t-sub{gap:6px 10px;font-size:.72rem}
 .forum-page .post-view{padding:20px 18px;border-radius:10px}
 .forum-page .post-view .p-title{font-size:1.45rem}
 .forum-page .post-view .p-body{font-size:.94rem;margin-top:22px}
 .forum-page .forum-reactions{margin-top:22px;padding:14px 0}
 .forum-page .reply-item{gap:10px}
 .forum-page .reply-ava{width:32px;height:32px;border-radius:9px;font-size:.76rem}
}
@media(prefers-reduced-motion:reduce){.reaction-button,.reaction-button svg,.forum-page .thread-row{transition:none}}
.forum-lightbox{position:fixed;inset:0;margin:0;width:100vw;height:100%;height:100dvh;max-width:none;max-height:none;border:0;border-radius:0;padding:0;background:transparent;color:#38434b;overflow:hidden;overscroll-behavior:none}
.forum-lightbox[open]{display:block}
.forum-lightbox::backdrop{background:rgba(242,244,245,.5);backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px);animation:forum-viewer-fade-in .28s ease-out both}
.forum-viewer-bar{position:absolute;top:16px;right:20px;z-index:2;display:flex;align-items:center;padding:5px;border:1px solid rgba(46,60,70,.1);border-radius:28px;background:rgba(255,255,255,.9);box-shadow:0 3px 16px rgba(36,48,57,.08);animation:forum-viewer-fade-in .22s ease-out both}
.forum-viewer-title{display:none}
.forum-viewer-tools{display:flex;align-items:center;gap:6px}
.forum-lightbox button{display:grid;place-items:center;width:40px;height:40px;padding:0;border:1px solid transparent;border-radius:50%;background:transparent;color:inherit;cursor:pointer;transition:background .16s}
.forum-lightbox button:hover{background:#e9edef}
.forum-lightbox button:focus-visible{outline:2px solid var(--sky-l);outline-offset:2px}
.forum-lightbox button:disabled{color:#a4adb3;cursor:default;background:transparent}
.forum-lightbox .forum-viewer-close{margin-left:6px;border-color:rgba(46,60,70,.1)}
.forum-viewer-zoom{min-width:54px;text-align:center;font-size:13px;font-variant-numeric:tabular-nums;color:#38434b}
.forum-viewer-stage{position:absolute;inset:56px 24px 24px;overflow:hidden;touch-action:none;user-select:none}
.forum-viewer-stage.is-zoomed{cursor:grab}
.forum-viewer-stage.is-dragging{cursor:grabbing}
.forum-lightbox img{position:absolute;left:50%;top:50%;display:block;max-width:none;max-height:none;object-fit:contain;opacity:0;transform-origin:center;user-select:none;border-radius:5px;box-shadow:0 12px 42px rgba(30,42,52,.14);transition:opacity .18s;will-change:transform}
.forum-lightbox img.is-ready{opacity:1}
.forum-viewer-status{position:absolute;inset:0;display:grid;place-items:center;margin:0;padding:24px;text-align:center;color:#65727c}
.forum-viewer-hint{position:absolute;bottom:max(14px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);margin:0;max-width:calc(100% - 24px);white-space:nowrap;text-align:center;padding:7px 14px;border-radius:20px;background:rgba(255,255,255,.7);font-size:12px;color:#65727c;pointer-events:none}
.forum-lightbox .forum-viewer-hint{display:none}
.forum-lightbox.is-closing .forum-viewer-bar,.forum-lightbox.is-closing .forum-viewer-hint,.forum-lightbox.is-closing::backdrop{animation:forum-viewer-fade-out .26s ease-in both}
@keyframes forum-viewer-fade-in{from{opacity:0}to{opacity:1}}
@keyframes forum-viewer-fade-out{from{opacity:1}to{opacity:0}}
@media(max-width:600px){.forum-viewer-bar{top:12px;right:12px;padding:4px}.forum-viewer-tools{gap:2px}.forum-lightbox button{width:40px;height:40px}.forum-lightbox .forum-viewer-close{margin-left:4px}.forum-viewer-zoom{min-width:45px}.forum-viewer-stage{inset:64px 8px 16px}.forum-viewer-hint{font-size:11px}}
@media(prefers-reduced-motion:reduce){.forum-lightbox::backdrop,.forum-lightbox .forum-viewer-stage,.forum-lightbox .forum-viewer-bar,.forum-lightbox .forum-viewer-hint{animation:none!important}.forum-lightbox img,.forum-lightbox button{transition:none}}
@media(max-width:600px){.forum-gallery{grid-template-columns:repeat(2,minmax(0,1fr))}.forum-image-preview{grid-template-columns:repeat(2,minmax(0,1fr))}}
